diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/Makefile.in | 318 | ||||
| -rw-r--r-- | gcc/cp/call.c | 4205 | ||||
| -rw-r--r-- | gcc/cp/class.c | 5048 | ||||
| -rw-r--r-- | gcc/cp/class.h | 161 | ||||
| -rw-r--r-- | gcc/cp/cp-tree.def | 92 | ||||
| -rw-r--r-- | gcc/cp/cp-tree.h | 2228 | ||||
| -rw-r--r-- | gcc/cp/cvt.c | 1997 | ||||
| -rw-r--r-- | gcc/cp/decl.c | 12087 | ||||
| -rw-r--r-- | gcc/cp/decl.h | 59 | ||||
| -rw-r--r-- | gcc/cp/decl2.c | 2823 | ||||
| -rw-r--r-- | gcc/cp/errfn.c | 217 | ||||
| -rw-r--r-- | gcc/cp/error.c | 1339 | ||||
| -rw-r--r-- | gcc/cp/except.c | 1224 | ||||
| -rw-r--r-- | gcc/cp/expr.c | 268 | ||||
| -rw-r--r-- | gcc/cp/gxx.gperf | 91 | ||||
| -rw-r--r-- | gcc/cp/gxxint.texi | 1030 | ||||
| -rw-r--r-- | gcc/cp/hash.h | 207 | ||||
| -rw-r--r-- | gcc/cp/init.c | 4181 | ||||
| -rw-r--r-- | gcc/cp/input.c | 184 | ||||
| -rw-r--r-- | gcc/cp/lex.c | 4783 | ||||
| -rw-r--r-- | gcc/cp/lex.h | 124 | ||||
| -rw-r--r-- | gcc/cp/method.c | 1651 | ||||
| -rw-r--r-- | gcc/cp/parse.y | 4099 | ||||
| -rw-r--r-- | gcc/cp/pt.c | 2311 | ||||
| -rw-r--r-- | gcc/cp/ptree.c | 163 | ||||
| -rw-r--r-- | gcc/cp/search.c | 3308 | ||||
| -rw-r--r-- | gcc/cp/sig.c | 998 | ||||
| -rw-r--r-- | gcc/cp/spew.c | 1141 | ||||
| -rw-r--r-- | gcc/cp/tree.c | 1797 | ||||
| -rw-r--r-- | gcc/cp/typeck.c | 6926 | ||||
| -rw-r--r-- | gcc/cp/typeck2.c | 1827 | ||||
| -rw-r--r-- | gcc/cp/xref.c | 827 |
32 files changed, 67714 insertions, 0 deletions
diff --git a/gcc/cp/Makefile.in b/gcc/cp/Makefile.in new file mode 100644 index 0000000..686b5b5 --- /dev/null +++ b/gcc/cp/Makefile.in @@ -0,0 +1,318 @@ +# Makefile for GNU C++ compiler. +# Copyright (C) 1987, 88, 90, 91, 92, 93, 1994 Free Software Foundation, Inc. + +#This file is part of GNU CC. + +#GNU CC is free software; you can redistribute it and/or modify +#it under the terms of the GNU General Public License as published by +#the Free Software Foundation; either version 2, or (at your option) +#any later version. + +#GNU CC is distributed in the hope that it will be useful, +#but WITHOUT ANY WARRANTY; without even the implied warranty of +#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +#GNU General Public License for more details. + +#You should have received a copy of the GNU General Public License +#along with GNU CC; see the file COPYING. If not, write to +#the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +# The targets for external use include: +# all, doc, TAGS, mostlyclean, clean, distclean, realclean, + +# Suppress smart makes who think they know how to automake Yacc files +.y.c: + +# Variables that exist for you to override. +# See below for how to change them for certain systems. + +INCLUDES = -I. -I.. -I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../config + +# Various ways of specifying flags for compilations: +# CFLAGS is for the user to override to, e.g., do a bootstrap with -O2. +# BOOT_CFLAGS is the value of CFLAGS to pass +# to the stage2 and stage3 compilations +# XCFLAGS is used for most compilations but not when using the GCC just built. +XCFLAGS = +CFLAGS = -g +BOOT_CFLAGS = -O $(CFLAGS) +# These exists to be overridden by the x-* and t-* files, respectively. +X_CFLAGS = +T_CFLAGS = + +X_CPPFLAGS = +T_CPPFLAGS = + +CC = cc +# CYGNUS LOCAL: we use byacc instead of bison, DO NOT SEND TO RMS +BISON = `if [ -f ../../byacc/byacc ] ; then echo ../../byacc/byacc ; else echo byacc ; fi` +BISONFLAGS = +LEX = `if [ -f ../../flex/flex ] ; then echo ../../flex/flex ; else echo flex ; fi` +LEXFLAGS= +AR = ar +OLDAR_FLAGS = qc +AR_FLAGS = rc +SHELL = /bin/sh +MAKEINFO = makeinfo +TEXI2DVI = texi2dvi + +# Define this as & to perform parallel make on a Sequent. +# Note that this has some bugs, and it seems currently necessary +# to compile all the gen* files first by hand to avoid erroneous results. +P = + +# This is used instead of ALL_CFLAGS when compiling with GCC_FOR_TARGET. +# It omits XCFLAGS, and specifies -B./. +# It also specifies -B$(tooldir)/ to find as and ld for a cross compiler. +GCC_CFLAGS=$(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(CFLAGS) + +# Tools to use when building a cross-compiler. +# These are used because `configure' appends `cross-make' +# to the makefile when making a cross-compiler. + +# CYGNUS LOCAL: we don't use cross-make. Instead we use the tools +# from the build tree, if they are available. +# program_transform_name and objdir are set by configure.in. +program_transform_name = +objdir = . + +target= ... `configure' substitutes actual target name here. +xmake_file= ... `configure' substitutes actual x- file name here. +tmake_file= ... `configure' substitutes actual t- file name here. +#version=`sed -e 's/.*\"\([^ \"]*\)[ \"].*/\1/' < $(srcdir)/version.c` +#mainversion=`sed -e 's/.*\"\([0-9]*\.[0-9]*\).*/\1/' < $(srcdir)/version.c` + +# Directory where sources are, from where we are. +srcdir = . + +# Change this to a null string if obstacks are installed in the +# system library. +OBSTACK=obstack.o + +# Directory to link to, when using the target `maketest'. +DIR = ../gcc + +# Choose the real default target. +ALL=all + +# End of variables for you to override. + +# Definition of `all' is here so that new rules inserted by sed +# do not specify the default target. +all: all.indirect + +# This tells GNU Make version 3 not to put all variables in the environment. +.NOEXPORT: + +# sed inserts variable overrides after the following line. +####target overrides +####host overrides +####cross overrides +####build overrides +####site overrides + +# Now figure out from those variables how to compile and link. + +all.indirect: Makefile ../cc1plus + +# IN_GCC tells obstack.h to use gstddef.h. +INTERNAL_CFLAGS = $(CROSS) -DIN_GCC + +# This is the variable actually used when we compile. +ALL_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(CFLAGS) $(XCFLAGS) + +# Likewise. +ALL_CPPFLAGS = $(CPPFLAGS) $(X_CPPFLAGS) $(T_CPPFLAGS) + +SUBDIR_OBSTACK = `if [ x$(OBSTACK) != x ]; then echo ../$(OBSTACK); else true; fi` +SUBDIR_USE_ALLOCA = `if [ x$(USE_ALLOCA) != x ]; then echo ../$(USE_ALLOCA); else true; fi` +SUBDIR_MALLOC = `if [ x$(MALLOC) != x ]; then echo ../$(MALLOC); else true; fi` + +# How to link with both our special library facilities +# and the system's installed libraries. +LIBS = $(SUBDIR_OBSTACK) $(SUBDIR_USE_ALLOCA) $(SUBDIR_MALLOC) $(CLIB) + +# Always use -I$(srcdir)/config when compiling. +.c.o: + $(CC) -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $< + +# This tells GNU make version 3 not to export all the variables +# defined in this file into the environment. +.NOEXPORT: + +# Lists of files for various purposes. + +# Language-specific object files for g++ + +CXX_OBJS = call.o decl.o errfn.o expr.o pt.o sig.o typeck2.o \ + class.o decl2.o error.o gc.o lex.o parse.o ptree.o spew.o typeck.o cvt.o \ + edsel.o except.o init.o method.o search.o tree.o xref.o + +# Files specific to the C interpreter bytecode compiler(s). +BC_OBJS = ../bc-emit.o ../bc-optab.o + +# Language-independent object files. +OBJS = ../toplev.o ../version.o ../tree.o ../print-tree.o ../stor-layout.o ../fold-const.o \ + ../function.o ../stmt.o ../expr.o ../calls.o ../expmed.o ../explow.o ../optabs.o ../varasm.o \ + ../rtl.o ../print-rtl.o ../rtlanal.o ../emit-rtl.o ../real.o \ + ../dbxout.o ../sdbout.o ../dwarfout.o ../xcoffout.o \ + ../integrate.o ../jump.o ../cse.o ../loop.o ../unroll.o ../flow.o ../stupid.o ../combine.o \ + ../regclass.o ../local-alloc.o ../global.o ../reload.o ../reload1.o ../caller-save.o \ + ../insn-peep.o ../reorg.o ../sched.o ../final.o ../recog.o ../reg-stack.o \ + ../insn-opinit.o ../insn-recog.o ../insn-extract.o ../insn-output.o ../insn-emit.o \ + ../insn-attrtab.o ../aux-output.o ../getpwd.o ../convert.o \ + ../c-common.o + +compiler: ../cc1plus +../cc1plus: $(P) $(CXX_OBJS) $(OBJS) $(BC_OBJS) $(LIBDEPS) + $(CC) $(ALL_CFLAGS) $(LDFLAGS) -o ../cc1plus \ + $(CXX_OBJS) $(OBJS) $(BC_OBJS) $(LIBS) + + +Makefile: $(srcdir)/Makefile.in $(srcdir)/../configure + cd ..; $(SHELL) config.status + +native: config.status ../cc1plus + +# Really, really stupid make features, such as SUN's KEEP_STATE, may force +# a target to build even if it is up-to-date. So we must verify that +# config.status does not exist before failing. +config.status: + @if [ ! -f config.status ] ; then \ + echo You must configure gcc. Look at the ../INSTALL file for details.; \ + false; \ + else \ + true; \ + fi + + +# Compiling object files from source files. + +# Note that dependencies on obstack.h are not written +# because that file is not part of GCC. +# Dependencies on gvarargs.h are not written +# because all that file does, when not compiling with GCC, +# is include the system varargs.h. + +# C++ language specific files. + +TREE_H = ../tree.h ../real.h ../tree.def ../machmode.h ../machmode.def +CXX_TREE_H = $(TREE_H) cp-tree.h tree.def + +parse.o : $(srcdir)/parse.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h lex.h + $(CC) -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $(BIG_SWITCHFLAG) \ + `echo $(srcdir)/parse.c | sed 's,^\./,,'` + +$(srcdir)/parse.c $(srcdir)/parse.h : $(srcdir)/parse.y + @echo expect 28 shift/reduce conflicts, 14 reduce/reduce conflicts. + cd $(srcdir); $(BISON) $(BISONFLAGS) -d -o parse.c parse.y + cd $(srcdir); grep '^#define[ ]*YYEMPTY' parse.c >>parse.h + +# hash.h really depends on $(srcdir)/gxx.gperf. +# But this would screw things for people that don't have gperf, +# if gxx.gpref got touched, say. +# Thus you have to remove hash.h to force it to be re-made. +$(srcdir)/hash.h: + gperf -p -j1 -g -o -t -N is_reserved_word '-k1,4,7,$$' \ + $(srcdir)/gxx.gperf >$(srcdir)/hash.h + +spew.o : spew.c $(CONFIG_H) $(CXX_TREE_H) \ + parse.h ../flags.h lex.h +lex.o : lex.c $(CONFIG_H) $(CXX_TREE_H) \ + parse.h input.c ../flags.h hash.h lex.h +decl.o : decl.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h \ + lex.h decl.h ../stack.h +decl2.o : decl2.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h \ + lex.h decl.h +typeck2.o : typeck2.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h +typeck.o : typeck.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h $(RTL_H) +class.o : class.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h +call.o : call.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h class.h +init.o : init.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h $(RTL_H) +method.o : method.c $(CONFIG_H) $(CXX_TREE_H) class.h +cvt.o : cvt.c $(CONFIG_H) $(CXX_TREE_H) class.h +search.o : search.c $(CONFIG_H) $(CXX_TREE_H) ../stack.h ../flags.h +tree.o : tree.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h +ptree.o : ptree.c $(CONFIG_H) $(CXX_TREE_H) +gc.o : gc.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h +except.o : except.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h $(RTL_H) +expr.o : expr.c $(CONFIG_H) $(CXX_TREE_H) $(RTL_H) ../flags.h \ + ../expr.h ../insn-codes.h +edsel.o : edsel.c $(CONFIG_H) $(CXX_TREE_H) ../stack.h ../flags.h +xref.o : xref.c $(CONFIG_H) $(CXX_TREE_H) ../input.h +pt.o : pt.c $(CONFIG_H) $(CXX_TREE_H) decl.h parse.h +error.o : error.c $(CONFIG_H) $(CXX_TREE_H) +errfn.o : errfn.c $(CONFIG_H) $(CXX_TREE_H) +sig.o : sig.c $(CONFIG_H) $(CXX_TREE_H) ../flags.h + +doc: info +info: + +dvi: + + +# Deletion of files made during compilation. +# There are four levels of this: +# `mostlyclean', `clean', `distclean' and `realclean'. +# `mostlyclean' is useful while working on a particular type of machine. +# It deletes most, but not all, of the files made by compilation. +# It does not delete libgcc.a or its parts, so it won't have to be recompiled. +# `clean' deletes everything made by running `make all'. +# `distclean' also deletes the files made by config. +# `realclean' also deletes everything that could be regenerated automatically. + + +mostlyclean: +# Delete the stamp files. + -rm -f stamp-* tmp-* +# Delete debugging dump files. + -rm -f *.greg *.lreg *.combine *.flow *.cse *.jump *.rtl *.tree *.loop + -rm -f *.dbr *.jump2 *.sched *.cse2 *.sched2 *.stack +# Delete unwanted output files from TeX. + -rm -f *.toc *.log *.vr *.fn *.cp *.tp *.ky *.pg +# Delete sorted indices we don't actually use. + -rm -f gcc.vrs gcc.kys gcc.tps gcc.pgs gcc.fns + -rm -f *.o ../cc1plus + +# Delete all files made by compilation +# that don't exist in the distribution. +clean: mostlyclean + -rm -f *.dvi + +# Delete all files that users would normally create +# while building and installing GCC. +distclean: clean + -rm -f config.status Makefile *.oaux + -rm -f parse.output + +# Delete anything likely to be found in the source directory +# that shouldn't be in the distribution. +extraclean: distclean + -rm -rf =* ./"#"* *~* + -rm -f patch* *.orig *.rej + -rm -f *.dvi *.oaux *.d *.[zZ] *.gz + -rm -f *.s *.s[0-9] *.i + +# Get rid of every file that's generated from some other file. +# Most of these files ARE PRESENT in the GCC distribution. +realclean: distclean + -rm -f TAGS + -rm -f parse.c parse.h parse.output + +# These exist for maintenance purposes. + +# This target creates the files that can be rebuilt, but go in the +# distribution anyway. +distdir: parse.c hash.h + +# Update the tags table. +TAGS: force + cd $(srcdir) ; \ + etags *.c *.h ; \ + echo 'l' | tr 'l' '\f' >> TAGS ; \ + echo 'parse.y,0' >> TAGS ; \ + etags -a ../*.h ../*.c; + +.PHONY: clean realclean TAGS + +force: diff --git a/gcc/cp/call.c b/gcc/cp/call.c new file mode 100644 index 0000000..02fc964 --- /dev/null +++ b/gcc/cp/call.c @@ -0,0 +1,4205 @@ +/* Functions related to invoking methods and overloaded functions. + Copyright (C) 1987, 1992, 1993 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) and + hacked by Brendan Kehoe (brendan@cygnus.com). + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* High-level class interface. */ + +#include "config.h" +#include "tree.h" +#include <stdio.h> +#include "cp-tree.h" +#include "class.h" +#include "flags.h" + +#include "obstack.h" +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +extern void sorry (); + +extern int inhibit_warnings; +extern int flag_assume_nonnull_objects; +extern tree ctor_label, dtor_label; + +/* From cp-typeck.c: */ +extern tree unary_complex_lvalue (); + +/* Compute the ease with which a conversion can be performed + between an expected and the given type. */ +static int convert_harshness_old (); +static struct harshness_code convert_harshness_ansi (); + +/* OLD METHOD */ +/* Note the old method also uses USER_HARSHNESS, BASE_DERIVED_HARSHNESS, + CONST_HARSHNESS. */ +#define EVIL 1 +#define TRIVIAL 0 +#define EVIL_HARSHNESS(ARG) ((ARG) & 1) +#define ELLIPSIS_HARSHNESS(ARG) ((ARG) & 2) +#define CONTRAVARIANT_HARSHNESS(ARG) ((ARG) & 8) +#define INT_TO_BD_HARSHNESS(ARG) (((ARG) << 5) | 16) +#define INT_FROM_BD_HARSHNESS(ARG) ((ARG) >> 5) +#define INT_TO_EASY_HARSHNESS(ARG) ((ARG) << 5) +#define INT_FROM_EASY_HARSHNESS(ARG) ((ARG) >> 5) +#define ONLY_EASY_HARSHNESS(ARG) (((ARG) & 31) == 0) + + +/* NEW METHOD */ +#define EVIL_RETURN(ARG) ((ARG).code = EVIL_CODE, (ARG)) +#define QUAL_RETURN(ARG) ((ARG).code = QUAL_CODE, (ARG)) +#define TRIVIAL_RETURN(ARG) ((ARG).code = TRIVIAL_CODE, (ARG)) +#define ZERO_RETURN(ARG) ((ARG).code = 0, (ARG)) + +#define USER_HARSHNESS(ARG) ((ARG) & 4) +#define BASE_DERIVED_HARSHNESS(ARG) ((ARG) & 16) +#define CONST_HARSHNESS(ARG) ((ARG) & 2048) + +/* Ordering function for overload resolution. Compare two candidates + by gross quality. */ +int +rank_for_overload_ansi (x, y) + struct candidate *x, *y; +{ + if (y->h.code & (EVIL_CODE|ELLIPSIS_CODE|USER_CODE)) + return y->h.code - x->h.code; + if (x->h.code & (EVIL_CODE|ELLIPSIS_CODE|USER_CODE)) + return -1; + + /* This is set by compute_conversion_costs, for calling a non-const + member function from a const member function. */ + if ((y->v.ansi_harshness[0].code & CONST_CODE) ^ (x->v.ansi_harshness[0].code & CONST_CODE)) + return y->v.ansi_harshness[0].code - x->v.ansi_harshness[0].code; + + if (y->h.code & STD_CODE) + { + if (x->h.code & STD_CODE) + return y->h.distance - x->h.distance; + return 1; + } + if (x->h.code & STD_CODE) + return -1; + + return y->h.code - x->h.code; +} + +int +rank_for_overload_old (x, y) + struct candidate *x, *y; +{ + if (y->evil - x->evil) + return y->evil - x->evil; + if (CONST_HARSHNESS (y->v.old_harshness[0]) ^ CONST_HARSHNESS (x->v.old_harshness[0])) + return y->v.old_harshness[0] - x->v.old_harshness[0]; + if (y->ellipsis - x->ellipsis) + return y->ellipsis - x->ellipsis; + if (y->user - x->user) + return y->user - x->user; + if (y->b_or_d - x->b_or_d) + return y->b_or_d - x->b_or_d; + return y->easy - x->easy; +} + +int +rank_for_overload (x, y) + struct candidate *x, *y; +{ + if (flag_ansi_overloading) + return rank_for_overload_ansi (x, y); + else + return rank_for_overload_old (x, y); +} + +/* Compare two candidates, argument by argument. */ +int +rank_for_ideal (x, y) + struct candidate *x, *y; +{ + int i; + + if (x->h_len != y->h_len) + abort (); + + for (i = 0; i < x->h_len; i++) + { + if (y->v.ansi_harshness[i].code - x->v.ansi_harshness[i].code) + return y->v.ansi_harshness[i].code - x->v.ansi_harshness[i].code; + if ((y->v.ansi_harshness[i].code & STD_CODE) + && (y->v.ansi_harshness[i].distance - x->v.ansi_harshness[i].distance)) + return y->v.ansi_harshness[i].distance - x->v.ansi_harshness[i].distance; + + /* They're both the same code. Now see if we're dealing with an + integral promotion that needs a finer grain of accuracy. */ + if (y->v.ansi_harshness[0].code & PROMO_CODE + && (y->v.ansi_harshness[i].int_penalty ^ x->v.ansi_harshness[i].int_penalty)) + return y->v.ansi_harshness[i].int_penalty - x->v.ansi_harshness[i].int_penalty; + } + return 0; +} + +/* TYPE is the type we wish to convert to. PARM is the parameter + we have to work with. We use a somewhat arbitrary cost function + to measure this conversion. */ +static struct harshness_code +convert_harshness_ansi (type, parmtype, parm) + register tree type, parmtype; + tree parm; +{ + struct harshness_code h; + register enum tree_code codel; + register enum tree_code coder; + + h.code = 0; + h.distance = 0; + h.int_penalty = 0; + +#ifdef GATHER_STATISTICS + n_convert_harshness++; +#endif + + if (TYPE_PTRMEMFUNC_P (type)) + type = TYPE_PTRMEMFUNC_FN_TYPE (type); + if (TYPE_PTRMEMFUNC_P (parmtype)) + parmtype = TYPE_PTRMEMFUNC_FN_TYPE (parmtype); + + codel = TREE_CODE (type); + coder = TREE_CODE (parmtype); + + if (TYPE_MAIN_VARIANT (parmtype) == TYPE_MAIN_VARIANT (type)) + return ZERO_RETURN (h); + + if (coder == ERROR_MARK) + return EVIL_RETURN (h); + + if (codel == POINTER_TYPE && fntype_p (parmtype)) + { + tree p1, p2; + struct harshness_code h1, h2; + + /* Get to the METHOD_TYPE or FUNCTION_TYPE that this might be. */ + type = TREE_TYPE (type); + + if (coder == POINTER_TYPE) + { + parmtype = TREE_TYPE (parmtype); + coder = TREE_CODE (parmtype); + } + + if (coder != TREE_CODE (type)) + return EVIL_RETURN (h); + + /* We allow the default conversion between function type + and pointer-to-function type for free. */ + if (type == parmtype) + return ZERO_RETURN (h); + + /* Compare return types. */ + p1 = TREE_TYPE (type); + p2 = TREE_TYPE (parmtype); + h2 = convert_harshness_ansi (p1, p2, NULL_TREE); + if (h2.code & EVIL_CODE) + return h2; + + h1.code = TRIVIAL_CODE; + h1.distance = 0; + + if (h2.distance != 0) + { + tree binfo; + + /* This only works for pointers. */ + if (TREE_CODE (p1) != POINTER_TYPE + && TREE_CODE (p1) != REFERENCE_TYPE) + return EVIL_RETURN (h); + + p1 = TREE_TYPE (p1); + p2 = TREE_TYPE (p2); + /* Don't die if we happen to be dealing with void*. */ + if (!IS_AGGR_TYPE (p1) || !IS_AGGR_TYPE (p2)) + return EVIL_RETURN (h); + if (h2.distance < 0) + binfo = get_binfo (p2, p1, 0); + else + binfo = get_binfo (p1, p2, 0); + + if (! BINFO_OFFSET_ZEROP (binfo)) + { + static int explained = 0; + if (h2.distance < 0) + message_2_types (sorry, "cannot cast `%d' to `%d' at function call site", p2, p1); + else + message_2_types (sorry, "cannot cast `%d' to `%d' at function call site", p1, p2); + + if (! explained++) + sorry ("(because pointer values change during conversion)"); + return EVIL_RETURN (h); + } + } + + h1.code |= h2.code; + if (h2.distance > h1.distance) + h1.distance = h2.distance; + + p1 = TYPE_ARG_TYPES (type); + p2 = TYPE_ARG_TYPES (parmtype); + while (p1 && TREE_VALUE (p1) != void_type_node + && p2 && TREE_VALUE (p2) != void_type_node) + { + h2 = convert_harshness_ansi (TREE_VALUE (p1), TREE_VALUE (p2), + NULL_TREE); + if (h2.code & EVIL_CODE) + return h2; + + if (h2.distance) + { + /* This only works for pointers and references. */ + if (TREE_CODE (TREE_VALUE (p1)) != POINTER_TYPE + && TREE_CODE (TREE_VALUE (p1)) != REFERENCE_TYPE) + return EVIL_RETURN (h); + h2.distance = - h2.distance; + } + + h1.code |= h2.code; + if (h2.distance > h1.distance) + h1.distance = h2.distance; + p1 = TREE_CHAIN (p1); + p2 = TREE_CHAIN (p2); + } + if (p1 == p2) + return h1; + if (p2) + { + if (p1) + return EVIL_RETURN (h); + h1.code |= ELLIPSIS_CODE; + return h1; + } + if (p1) + { + if (TREE_PURPOSE (p1) == NULL_TREE) + h1.code |= EVIL_CODE; + return h1; + } + } + else if (codel == POINTER_TYPE && coder == OFFSET_TYPE) + { + /* Get to the OFFSET_TYPE that this might be. */ + type = TREE_TYPE (type); + + if (coder != TREE_CODE (type)) + return EVIL_RETURN (h); + + if (TYPE_OFFSET_BASETYPE (type) == TYPE_OFFSET_BASETYPE (parmtype)) + h.code = 0; + else if (UNIQUELY_DERIVED_FROM_P (TYPE_OFFSET_BASETYPE (type), + TYPE_OFFSET_BASETYPE (parmtype))) + { + h.code = STD_CODE; + h.distance = 1; + } + else if (UNIQUELY_DERIVED_FROM_P (TYPE_OFFSET_BASETYPE (parmtype), + TYPE_OFFSET_BASETYPE (type))) + { + h.code = STD_CODE; + h.distance = -1; + } + else + return EVIL_RETURN (h); + /* Now test the OFFSET_TYPE's target compatibility. */ + type = TREE_TYPE (type); + parmtype = TREE_TYPE (parmtype); + } + + if (coder == UNKNOWN_TYPE) + { + if (codel == FUNCTION_TYPE + || codel == METHOD_TYPE + || (codel == POINTER_TYPE + && (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE))) + return TRIVIAL_RETURN (h); + return EVIL_RETURN (h); + } + + if (coder == VOID_TYPE) + return EVIL_RETURN (h); + + if (codel == ENUMERAL_TYPE || codel == INTEGER_TYPE) + { + /* Control equivalence of ints an enums. */ + + if (codel == ENUMERAL_TYPE + && flag_int_enum_equivalence == 0) + { + /* Enums can be converted to ints, but not vice-versa. */ + if (coder != ENUMERAL_TYPE + || TYPE_MAIN_VARIANT (type) != TYPE_MAIN_VARIANT (parmtype)) + return EVIL_RETURN (h); + } + + /* else enums and ints (almost) freely interconvert. */ + + if (coder == INTEGER_TYPE || coder == ENUMERAL_TYPE) + { + if ((TREE_UNSIGNED (type) ^ TREE_UNSIGNED (parmtype)) + || codel != coder + || TYPE_MODE (type) != TYPE_MODE (parmtype)) + { + /* Make sure a value-preserving condition [from a smaller type to + a larger type] is preferred to a possibly value-destroying + standard conversion [from a larger type to a smaller type]. */ + if (TYPE_PRECISION (type) >= TYPE_PRECISION (parmtype)) + { + h.code = PROMO_CODE; + /* A char, short, wchar_t, etc., should promote to an int if + it can handle it, otherwise to an unsigned. So we'll make + an unsigned. */ + if (type != integer_type_node) + h.int_penalty = 1; + } + else + h.code = STD_CODE; + } + + /* If the three above conditions didn't trigger, we have found two + very similar types. On systems where they're the same size, we + can end up here with TYPE as `long' and PARMTYPE as `int'. Make + sure we realize that, even though they're the same mode, we will + have to do some sort of integral promotion on the type, since + they're not the same. */ + if (! comptypes (type, parmtype, 1) && h.code == 0) + { + /* This call to common_type will return the best type for the + combination. If it matches TYPE, that means we'll be converting + from a so-called smaller type (in PARMTYPE) to the larger in TYPE, + thus an integral promotion. Otherwise, it must be going from a + larger type in PARMTYPE to a smaller expected type in TYPE, so we + make it a standard conversion instead. */ + if (common_type (type, parmtype) == type) + h.code = PROMO_CODE; + else + h.code = STD_CODE; + } + + return h; + } + else if (coder == REAL_TYPE) + { + h.code = STD_CODE; + h.distance = 0; + return h; + } + } + + if (codel == REAL_TYPE) + { + if (coder == REAL_TYPE) + { + /* Shun converting among float, double, and long double if a + choice exists. */ + h.code = PROMO_CODE; + return h; + } + else if (coder == INTEGER_TYPE || coder == ENUMERAL_TYPE) + { + h.code = STD_CODE; + h.distance = 0; + return h; + } + } + + /* Convert arrays which have not previously been converted. */ + if (codel == ARRAY_TYPE) + codel = POINTER_TYPE; + if (coder == ARRAY_TYPE) + coder = POINTER_TYPE; + + /* Conversions among pointers */ + if (codel == POINTER_TYPE && coder == POINTER_TYPE) + { + register tree ttl = TYPE_MAIN_VARIANT (TREE_TYPE (type)); + register tree ttr = TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)); + int penalty = 4 * (ttl != ttr); + + /* Anything converts to void *. void * converts to anything. + Since these may be `const void *' (etc.) use VOID_TYPE + instead of void_type_node. Otherwise, the targets must be the same, + except that we do allow (at some cost) conversion between signed and + unsigned pointer types. */ + + if ((TREE_CODE (ttl) == METHOD_TYPE + || TREE_CODE (ttl) == FUNCTION_TYPE) + && TREE_CODE (ttl) == TREE_CODE (ttr)) + { + if (comptypes (ttl, ttr, -1)) + { + h.code = penalty ? STD_CODE : 0; + h.distance = 0; + } + else + h.code = EVIL_CODE; + return h; + } + +#if 1 + if (TREE_CODE (ttl) != VOID_TYPE && TREE_CODE (ttr) != VOID_TYPE) + { + if (TREE_UNSIGNED (ttl) != TREE_UNSIGNED (ttr)) + { + ttl = unsigned_type (ttl); + ttr = unsigned_type (ttr); + penalty = 10; + } + if (! comp_target_types (ttl, ttr, 0)) + return EVIL_RETURN (h); + } +#else + if (!(TREE_CODE (ttl) == VOID_TYPE + || TREE_CODE (ttr) == VOID_TYPE + || (TREE_UNSIGNED (ttl) ^ TREE_UNSIGNED (ttr) + && (ttl = unsigned_type (ttl), + ttr = unsigned_type (ttr), + penalty = 10, 0)) + || (comp_target_types (ttl, ttr, 0)))) + return EVIL_RETURN (h); +#endif + + if (penalty == 10 || ttr == ttl) + { + tree tmp1 = TREE_TYPE (type), tmp2 = TREE_TYPE (parmtype); + + /* If one was unsigned but the other wasn't, then we need to + do a standard conversion from T to unsigned T. */ + if (penalty == 10) + h.code = PROMO_CODE; /* was STD_CODE */ + else + h.code = 0; + + /* Note conversion from `T*' to `const T*', + or `T*' to `volatile T*'. */ + if (ttl == ttr + && ((TYPE_READONLY (tmp1) != TREE_READONLY (tmp2)) + || (TYPE_VOLATILE (tmp1) != TYPE_VOLATILE (tmp2)))) + h.code |= QUAL_CODE; + + h.distance = 0; + return h; + } + + + if (TREE_CODE (ttl) == RECORD_TYPE && TREE_CODE (ttr) == RECORD_TYPE) + { + int b_or_d = get_base_distance (ttl, ttr, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (ttr, ttl, 0, 0); + if (b_or_d < 0) + return EVIL_RETURN (h); + h.distance = -b_or_d; + } + else + h.distance = b_or_d; + h.code = STD_CODE; + return h; + } + + /* If converting from a `class*' to a `void*', make it + less favorable than any inheritance relationship. */ + if (TREE_CODE (ttl) == VOID_TYPE && IS_AGGR_TYPE (ttr)) + { + h.code = STD_CODE; + h.distance = CLASSTYPE_MAX_DEPTH (ttr)+1; + return h; + } + h.code = penalty ? STD_CODE : PROMO_CODE; + return h; + } + + if (codel == POINTER_TYPE && coder == INTEGER_TYPE) + { + /* This is not a bad match, but don't let it beat + integer-enum combinations. */ + if (parm && integer_zerop (parm)) + { + h.code = STD_CODE; + h.distance = 0; + return h; + } + } + + /* C++: one of the types must be a reference type. */ + { + tree ttl, ttr; + register tree intype = TYPE_MAIN_VARIANT (parmtype); + register enum tree_code form = TREE_CODE (intype); + int penalty; + + if (codel == REFERENCE_TYPE || coder == REFERENCE_TYPE) + { + ttl = TYPE_MAIN_VARIANT (type); + + if (codel == REFERENCE_TYPE) + { + ttl = TREE_TYPE (ttl); + + /* When passing a non-const argument into a const reference, + dig it a little, so a non-const reference is preferred over + this one. (mrs) */ + if (parm && TREE_READONLY (ttl) && ! TREE_READONLY (parm)) + penalty = 2; + else + penalty = 0; + + ttl = TYPE_MAIN_VARIANT (ttl); + + if (form == OFFSET_TYPE) + { + intype = TREE_TYPE (intype); + form = TREE_CODE (intype); + } + + if (form == REFERENCE_TYPE) + { + intype = TYPE_MAIN_VARIANT (TREE_TYPE (intype)); + + if (ttl == intype) + return ZERO_RETURN (h); + penalty = 2; + } + else + { + /* Can reference be built up? */ + if (ttl == intype && penalty == 0) { + /* Because the READONLY and VIRTUAL bits are not always in + the type, this extra check is necessary. The problem + should be fixed someplace else, and this extra code + removed. + + Also, if type if a reference, the readonly bits could + either be in the outer type (with reference) or on the + inner type (the thing being referenced). (mrs) */ + if (parm + && ((TREE_READONLY (parm) + && ! (TYPE_READONLY (type) + || (TREE_CODE (type) == REFERENCE_TYPE + && TYPE_READONLY (TREE_TYPE (type))))) + || (TREE_SIDE_EFFECTS (parm) + && ! (TYPE_VOLATILE (type) + || (TREE_CODE (type) == REFERENCE_TYPE + && TYPE_VOLATILE (TREE_TYPE (type))))))) + penalty = 2; + else + return ZERO_RETURN (h); + } + else + penalty = 2; + } + } + else if (form == REFERENCE_TYPE) + { + if (parm) + { + tree tmp = convert_from_reference (parm); + intype = TYPE_MAIN_VARIANT (TREE_TYPE (tmp)); + } + else + { + intype = parmtype; + do + intype = TREE_TYPE (intype); + while (TREE_CODE (intype) == REFERENCE_TYPE); + intype = TYPE_MAIN_VARIANT (intype); + } + + if (ttl == intype) + return ZERO_RETURN (h); + else + penalty = 2; + } + + if (TREE_UNSIGNED (ttl) ^ TREE_UNSIGNED (intype)) + { + ttl = unsigned_type (ttl); + intype = unsigned_type (intype); + penalty += 2; + } + + ttr = intype; + + /* If the initializer is not an lvalue, then it does not + matter if we make life easier for the programmer + by creating a temporary variable with which to + hold the result. */ + if (parm && (coder == INTEGER_TYPE + || coder == ENUMERAL_TYPE + || coder == REAL_TYPE) + && ! lvalue_p (parm)) + { + h = convert_harshness_ansi (ttl, ttr, NULL_TREE); + if (penalty > 2 || h.code != 0) + h.code |= STD_CODE; + else + h.code |= TRIVIAL_CODE; + h.distance = 0; + return h; + } + + if (ttl == ttr) + { + if (penalty > 2) + { + h.code = STD_CODE; + h.distance = 0; + } + else + { + h.code = TRIVIAL_CODE; + /* We set this here so that build_overload_call_real will be + able to see the penalty we found, rather than just looking + at a TRIVIAL_CODE with no other information. */ + h.int_penalty = penalty; + } + return h; + } + + /* Pointers to voids always convert for pointers. But + make them less natural than more specific matches. */ + if (TREE_CODE (ttl) == POINTER_TYPE && TREE_CODE (ttr) == POINTER_TYPE) + { + if (TREE_TYPE (ttl) == void_type_node + || TREE_TYPE (ttr) == void_type_node) + { + h.code = STD_CODE; + h.distance = 0; + return h; + } + } + + if (parm && codel != REFERENCE_TYPE) + { + h = convert_harshness_ansi (ttl, ttr, NULL_TREE); + if (penalty) + h.code |= STD_CODE; + h.distance = 0; + return h; + } + + /* Here it does matter. If this conversion is from derived to base, + allow it. Otherwise, types must be compatible in the strong sense. */ + if (TREE_CODE (ttl) == RECORD_TYPE && TREE_CODE (ttr) == RECORD_TYPE) + { + int b_or_d = get_base_distance (ttl, ttr, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (ttr, ttl, 0, 0); + if (b_or_d < 0) + return EVIL_RETURN (h); + h.distance = -b_or_d; + } + /* Say that this conversion is relatively painless. + If it turns out that there is a user-defined X(X&) + constructor, then that will be invoked, but that's + preferable to dealing with other user-defined conversions + that may produce surprising results. */ + else + h.distance = b_or_d; + h.code = STD_CODE; + return h; + } + + if (comp_target_types (ttl, intype, 1)) + { + if (penalty) + h.code = STD_CODE; + h.distance = 0; + return h; + } + } + } + if (codel == RECORD_TYPE && coder == RECORD_TYPE) + { + int b_or_d = get_base_distance (type, parmtype, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (parmtype, type, 0, 0); + if (b_or_d < 0) + return EVIL_RETURN (h); + h.distance = -b_or_d; + } + else + h.distance = b_or_d; + h.code = STD_CODE; + return h; + } + return EVIL_RETURN (h); +} + +/* TYPE is the type we wish to convert to. PARM is the parameter + we have to work with. We use a somewhat arbitrary cost function + to measure this conversion. */ +static int +convert_harshness_old (type, parmtype, parm) + register tree type, parmtype; + tree parm; +{ + register enum tree_code codel; + register enum tree_code coder; + +#ifdef GATHER_STATISTICS + n_convert_harshness++; +#endif + + if (TYPE_PTRMEMFUNC_P (type)) + type = TYPE_PTRMEMFUNC_FN_TYPE (type); + if (TYPE_PTRMEMFUNC_P (parmtype)) + parmtype = TYPE_PTRMEMFUNC_FN_TYPE (parmtype); + + codel = TREE_CODE (type); + coder = TREE_CODE (parmtype); + + if (TYPE_MAIN_VARIANT (parmtype) == TYPE_MAIN_VARIANT (type)) + return TRIVIAL; + + if (coder == ERROR_MARK) + return EVIL; + + if (codel == POINTER_TYPE && fntype_p (parmtype)) + { + tree p1, p2; + int harshness, new_harshness; + + /* Get to the METHOD_TYPE or FUNCTION_TYPE that this might be. */ + type = TREE_TYPE (type); + + if (coder == POINTER_TYPE) + { + parmtype = TREE_TYPE (parmtype); + coder = TREE_CODE (parmtype); + } + + if (coder != TREE_CODE (type)) + return EVIL; + + harshness = 0; + + /* We allow the default conversion between function type + and pointer-to-function type for free. */ + if (type == parmtype) + return TRIVIAL; + + /* Compare return types. */ + p1 = TREE_TYPE (type); + p2 = TREE_TYPE (parmtype); + new_harshness = convert_harshness_old (p1, p2, NULL_TREE); + if (EVIL_HARSHNESS (new_harshness)) + return EVIL; + + if (BASE_DERIVED_HARSHNESS (new_harshness)) + { + tree binfo; + + /* This only works for pointers. */ + if (TREE_CODE (p1) != POINTER_TYPE + && TREE_CODE (p1) != REFERENCE_TYPE) + return EVIL; + + p1 = TREE_TYPE (p1); + p2 = TREE_TYPE (p2); + /* Don't die if we happen to be dealing with void*. */ + if (!IS_AGGR_TYPE (p1) || !IS_AGGR_TYPE (p2)) + return EVIL; + if (CONTRAVARIANT_HARSHNESS (new_harshness)) + binfo = get_binfo (p2, p1, 0); + else + binfo = get_binfo (p1, p2, 0); + + if (! BINFO_OFFSET_ZEROP (binfo)) + { + static int explained = 0; + if (CONTRAVARIANT_HARSHNESS (new_harshness)) + message_2_types (sorry, "cannot cast `%d' to `%d' at function call site", p2, p1); + else + message_2_types (sorry, "cannot cast `%d' to `%d' at function call site", p1, p2); + + if (! explained++) + sorry ("(because pointer values change during conversion)"); + return EVIL; + } + } + + harshness |= new_harshness; + + p1 = TYPE_ARG_TYPES (type); + p2 = TYPE_ARG_TYPES (parmtype); + while (p1 && TREE_VALUE (p1) != void_type_node + && p2 && TREE_VALUE (p2) != void_type_node) + { + new_harshness = convert_harshness_old (TREE_VALUE (p1), + TREE_VALUE (p2), NULL_TREE); + if (EVIL_HARSHNESS (new_harshness)) + return EVIL; + + if (BASE_DERIVED_HARSHNESS (new_harshness)) + { + /* This only works for pointers and references. */ + if (TREE_CODE (TREE_VALUE (p1)) != POINTER_TYPE + && TREE_CODE (TREE_VALUE (p1)) != REFERENCE_TYPE) + return EVIL; + new_harshness ^= CONTRAVARIANT_HARSHNESS (new_harshness); + harshness |= new_harshness; + } + /* This trick allows use to accumulate easy type + conversions without messing up the bits that encode + info about more involved things. */ + else if (ONLY_EASY_HARSHNESS (new_harshness)) + harshness += new_harshness; + else + harshness |= new_harshness; + p1 = TREE_CHAIN (p1); + p2 = TREE_CHAIN (p2); + } + if (p1 == p2) + return harshness; + if (p2) + return p1 ? EVIL : (harshness | ELLIPSIS_HARSHNESS (-1)); + if (p1) + return harshness | (TREE_PURPOSE (p1) == NULL_TREE); + } + else if (codel == POINTER_TYPE && coder == OFFSET_TYPE) + { + /* XXX: Note this is set a few times, but it's never actually + used! (bpk) */ + int harshness; + + /* Get to the OFFSET_TYPE that this might be. */ + type = TREE_TYPE (type); + + if (coder != TREE_CODE (type)) + return EVIL; + + harshness = 0; + + if (TYPE_OFFSET_BASETYPE (type) == TYPE_OFFSET_BASETYPE (parmtype)) + harshness = 0; + else if (UNIQUELY_DERIVED_FROM_P (TYPE_OFFSET_BASETYPE (type), + TYPE_OFFSET_BASETYPE (parmtype))) + harshness = INT_TO_BD_HARSHNESS (1); + else if (UNIQUELY_DERIVED_FROM_P (TYPE_OFFSET_BASETYPE (parmtype), + TYPE_OFFSET_BASETYPE (type))) + harshness = CONTRAVARIANT_HARSHNESS (-1); + else + return EVIL; + /* Now test the OFFSET_TYPE's target compatibility. */ + type = TREE_TYPE (type); + parmtype = TREE_TYPE (parmtype); + } + + if (coder == UNKNOWN_TYPE) + { + if (codel == FUNCTION_TYPE + || codel == METHOD_TYPE + || (codel == POINTER_TYPE + && (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE))) + return TRIVIAL; + return EVIL; + } + + if (coder == VOID_TYPE) + return EVIL; + + if (codel == ENUMERAL_TYPE || codel == INTEGER_TYPE) + { + /* Control equivalence of ints an enums. */ + + if (codel == ENUMERAL_TYPE + && flag_int_enum_equivalence == 0) + { + /* Enums can be converted to ints, but not vice-versa. */ + if (coder != ENUMERAL_TYPE + || TYPE_MAIN_VARIANT (type) != TYPE_MAIN_VARIANT (parmtype)) + return EVIL; + } + + /* else enums and ints (almost) freely interconvert. */ + + if (coder == INTEGER_TYPE || coder == ENUMERAL_TYPE) + { + int easy = TREE_UNSIGNED (type) ^ TREE_UNSIGNED (parmtype); + if (codel != coder) + easy += 1; + if (TYPE_MODE (type) != TYPE_MODE (parmtype)) + easy += 2; + return INT_TO_EASY_HARSHNESS (easy); + } + else if (coder == REAL_TYPE) + return INT_TO_EASY_HARSHNESS (4); + } + + if (codel == REAL_TYPE) + if (coder == REAL_TYPE) + /* Shun converting between float and double if a choice exists. */ + { + if (TYPE_MODE (type) != TYPE_MODE (parmtype)) + return INT_TO_EASY_HARSHNESS (2); + return TRIVIAL; + } + else if (coder == INTEGER_TYPE || coder == ENUMERAL_TYPE) + return INT_TO_EASY_HARSHNESS (4); + + /* convert arrays which have not previously been converted. */ + if (codel == ARRAY_TYPE) + codel = POINTER_TYPE; + if (coder == ARRAY_TYPE) + coder = POINTER_TYPE; + + /* Conversions among pointers */ + if (codel == POINTER_TYPE && coder == POINTER_TYPE) + { + register tree ttl = TYPE_MAIN_VARIANT (TREE_TYPE (type)); + register tree ttr = TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)); + int penalty = 4 * (ttl != ttr); + /* Anything converts to void *. void * converts to anything. + Since these may be `const void *' (etc.) use VOID_TYPE + instead of void_type_node. + Otherwise, the targets must be the same, + except that we do allow (at some cost) conversion + between signed and unsinged pointer types. */ + + if ((TREE_CODE (ttl) == METHOD_TYPE + || TREE_CODE (ttl) == FUNCTION_TYPE) + && TREE_CODE (ttl) == TREE_CODE (ttr)) + { + if (comptypes (ttl, ttr, -1)) + return INT_TO_EASY_HARSHNESS (penalty); + return EVIL; + } + + if (!(TREE_CODE (ttl) == VOID_TYPE + || TREE_CODE (ttr) == VOID_TYPE + || (TREE_UNSIGNED (ttl) ^ TREE_UNSIGNED (ttr) + && (ttl = unsigned_type (ttl), + ttr = unsigned_type (ttr), + penalty = 10, 0)) + || (comp_target_types (ttl, ttr, 0)))) + return EVIL; + + if (penalty == 10) + return INT_TO_EASY_HARSHNESS (10); + if (ttr == ttl) + return INT_TO_BD_HARSHNESS (0); + + if (TREE_CODE (ttl) == RECORD_TYPE && TREE_CODE (ttr) == RECORD_TYPE) + { + int b_or_d = get_base_distance (ttl, ttr, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (ttr, ttl, 0, 0); + if (b_or_d < 0) + return EVIL; + return CONTRAVARIANT_HARSHNESS (-1); + } + return INT_TO_BD_HARSHNESS (b_or_d); + } + /* If converting from a `class*' to a `void*', make it + less favorable than any inheritance relationship. */ + if (TREE_CODE (ttl) == VOID_TYPE && IS_AGGR_TYPE (ttr)) + return INT_TO_BD_HARSHNESS (CLASSTYPE_MAX_DEPTH (ttr)+1); + return INT_TO_EASY_HARSHNESS (penalty); + } + + if (codel == POINTER_TYPE && coder == INTEGER_TYPE) + { + /* This is not a bad match, but don't let it beat + integer-enum combinations. */ + if (parm && integer_zerop (parm)) + return INT_TO_EASY_HARSHNESS (4); + } + + /* C++: Since the `this' parameter of a signature member function + is represented as a signature pointer to handle default implementations + correctly, we can have the case that `type' is a signature pointer + while `parmtype' is a pointer to a signature table. We don't really + do any conversions in this case, so just return 0. */ + + if (codel == RECORD_TYPE && coder == POINTER_TYPE + && IS_SIGNATURE_POINTER (type) && IS_SIGNATURE (TREE_TYPE (parmtype))) + return 0; + + /* C++: one of the types must be a reference type. */ + { + tree ttl, ttr; + register tree intype = TYPE_MAIN_VARIANT (parmtype); + register enum tree_code form = TREE_CODE (intype); + int penalty; + + if (codel == REFERENCE_TYPE || coder == REFERENCE_TYPE) + { + ttl = TYPE_MAIN_VARIANT (type); + + if (codel == REFERENCE_TYPE) + { + ttl = TREE_TYPE (ttl); + + /* When passing a non-const argument into a const reference, + dig it a little, so a non-const reference is preferred over + this one. (mrs) */ + if (parm && TREE_READONLY (ttl) && ! TREE_READONLY (parm)) + penalty = 2; + else + penalty = 0; + + ttl = TYPE_MAIN_VARIANT (ttl); + + if (form == OFFSET_TYPE) + { + intype = TREE_TYPE (intype); + form = TREE_CODE (intype); + } + + if (form == REFERENCE_TYPE) + { + intype = TYPE_MAIN_VARIANT (TREE_TYPE (intype)); + + if (ttl == intype) + return TRIVIAL; + penalty = 2; + } + else + { + /* Can reference be built up? */ + if (ttl == intype && penalty == 0) { + /* Because the READONLY bits and VIRTUAL bits are not always + in the type, this extra check is necessary. The problem + should be fixed someplace else, and this extra code + removed. + + Also, if type if a reference, the readonly bits could + either be in the outer type (with reference) or on the + inner type (the thing being referenced). (mrs) */ + if (parm + && ((TREE_READONLY (parm) + && ! (TYPE_READONLY (type) + || (TREE_CODE (type) == REFERENCE_TYPE + && TYPE_READONLY (TREE_TYPE (type))))) + || (TREE_SIDE_EFFECTS (parm) + && ! (TYPE_VOLATILE (type) + || (TREE_CODE (type) == REFERENCE_TYPE + && TYPE_VOLATILE (TREE_TYPE (type))))))) + penalty = 2; + else + return TRIVIAL; + } + else + penalty = 2; + } + } + else if (form == REFERENCE_TYPE) + { + if (parm) + { + tree tmp = convert_from_reference (parm); + intype = TYPE_MAIN_VARIANT (TREE_TYPE (tmp)); + } + else + { + intype = parmtype; + do + { + intype = TREE_TYPE (intype); + } + while (TREE_CODE (intype) == REFERENCE_TYPE); + intype = TYPE_MAIN_VARIANT (intype); + } + + if (ttl == intype) + return TRIVIAL; + else + penalty = 2; + } + + if (TREE_UNSIGNED (ttl) ^ TREE_UNSIGNED (intype)) + { + ttl = unsigned_type (ttl); + intype = unsigned_type (intype); + penalty += 2; + } + + ttr = intype; + + /* If the initializer is not an lvalue, then it does not + matter if we make life easier for the programmer + by creating a temporary variable with which to + hold the result. */ + if (parm && (coder == INTEGER_TYPE + || coder == ENUMERAL_TYPE + || coder == REAL_TYPE) + && ! lvalue_p (parm)) + return (convert_harshness_old (ttl, ttr, NULL_TREE) + | INT_TO_EASY_HARSHNESS (penalty)); + + if (ttl == ttr) + { + if (penalty) + return INT_TO_EASY_HARSHNESS (penalty); + return INT_TO_BD_HARSHNESS (0); + } + + /* Pointers to voids always convert for pointers. But + make them less natural than more specific matches. */ + if (TREE_CODE (ttl) == POINTER_TYPE && TREE_CODE (ttr) == POINTER_TYPE) + if (TREE_TYPE (ttl) == void_type_node + || TREE_TYPE (ttr) == void_type_node) + return INT_TO_EASY_HARSHNESS (penalty+1); + + if (parm && codel != REFERENCE_TYPE) + return (convert_harshness_old (ttl, ttr, NULL_TREE) + | INT_TO_EASY_HARSHNESS (penalty)); + + /* Here it does matter. If this conversion is from + derived to base, allow it. Otherwise, types must + be compatible in the strong sense. */ + if (TREE_CODE (ttl) == RECORD_TYPE && TREE_CODE (ttr) == RECORD_TYPE) + { + int b_or_d = get_base_distance (ttl, ttr, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (ttr, ttl, 0, 0); + if (b_or_d < 0) + return EVIL; + return CONTRAVARIANT_HARSHNESS (-1); + } + /* Say that this conversion is relatively painless. + If it turns out that there is a user-defined X(X&) + constructor, then that will be invoked, but that's + preferable to dealing with other user-defined conversions + that may produce surprising results. */ + return INT_TO_BD_HARSHNESS (b_or_d); + } + + if (comp_target_types (ttl, intype, 1)) + return INT_TO_EASY_HARSHNESS (penalty); + } + } + if (codel == RECORD_TYPE && coder == RECORD_TYPE) + { + int b_or_d = get_base_distance (type, parmtype, 0, 0); + if (b_or_d < 0) + { + b_or_d = get_base_distance (parmtype, type, 0, 0); + if (b_or_d < 0) + return EVIL; + return CONTRAVARIANT_HARSHNESS (-1); + } + return INT_TO_BD_HARSHNESS (b_or_d); + } + return EVIL; +} + +#ifdef DEBUG_MATCHING +static char * +print_harshness (h) + struct harshness_code *h; +{ + static char buf[1024]; + char tmp[1024]; + + bzero (buf, 1024 * sizeof (char)); + strcat (buf, "codes=["); + if (h->code & EVIL_CODE) + strcat (buf, "EVIL"); + if (h->code & CONST_CODE) + strcat (buf, " CONST"); + if (h->code & ELLIPSIS_CODE) + strcat (buf, " ELLIPSIS"); + if (h->code & USER_CODE) + strcat (buf, " USER"); + if (h->code & STD_CODE) + strcat (buf, " STD"); + if (h->code & PROMO_CODE) + strcat (buf, " PROMO"); + if (h->code & QUAL_CODE) + strcat (buf, " QUAL"); + if (h->code & TRIVIAL_CODE) + strcat (buf, " TRIVIAL"); + if (buf[0] == '\0') + strcat (buf, "0"); + + sprintf (tmp, "] distance=%d int_penalty=%d", h->distance, h->int_penalty); + + strcat (buf, tmp); + + return buf; +} +#endif + +/* Algorithm: For each argument, calculate how difficult it is to + make FUNCTION accept that argument. If we can easily tell that + FUNCTION won't be acceptable to one of the arguments, then we + don't need to compute the ease of converting the other arguments, + since it will never show up in the intersection of all arguments' + favorite functions. + + Conversions between builtin and user-defined types are allowed, but + no function involving such a conversion is preferred to one which + does not require such a conversion. Furthermore, such conversions + must be unique. */ + +void +compute_conversion_costs_ansi (function, tta_in, cp, arglen) + tree function; + tree tta_in; + struct candidate *cp; + int arglen; +{ + tree ttf_in = TYPE_ARG_TYPES (TREE_TYPE (function)); + tree ttf = ttf_in; + tree tta = tta_in; + + /* Start out with no strikes against. */ + int evil_strikes = 0; + int ellipsis_strikes = 0; + int user_strikes = 0; + int b_or_d_strikes = 0; + int easy_strikes = 0; + + int strike_index = 0, win; + struct harshness_code lose; + +#ifdef GATHER_STATISTICS + n_compute_conversion_costs++; +#endif + + cp->function = function; + cp->arg = tta ? TREE_VALUE (tta) : NULL_TREE; + cp->u.bad_arg = 0; /* optimistic! */ + + cp->h.code = 0; + cp->h.distance = 0; + cp->h.int_penalty = 0; + bzero (cp->v.ansi_harshness, + (cp->h_len + 1) * sizeof (struct harshness_code)); + + while (ttf && tta) + { + struct harshness_code h; + + if (ttf == void_list_node) + break; + + if (type_unknown_p (TREE_VALUE (tta))) + { + /* Must perform some instantiation here. */ + tree rhs = TREE_VALUE (tta); + tree lhstype = TREE_VALUE (ttf); + + /* Keep quiet about possible contravariance violations. */ + int old_inhibit_warnings = inhibit_warnings; + inhibit_warnings = 1; + + /* @@ This is to undo what `grokdeclarator' does to + parameter types. It really should go through + something more general. */ + + TREE_TYPE (tta) = unknown_type_node; + rhs = instantiate_type (lhstype, rhs, 0); + inhibit_warnings = old_inhibit_warnings; + + if (TREE_CODE (rhs) == ERROR_MARK) + h.code = EVIL_CODE; + else + h = convert_harshness_ansi (lhstype, TREE_TYPE (rhs), rhs); + } + else + { +#ifdef DEBUG_MATCHING + static tree old_function = NULL_TREE; + + if (!old_function || function != old_function) + { + cp_error ("trying %D", function); + old_function = function; + } + + cp_error (" doing (%T) %E against arg %T", + TREE_TYPE (TREE_VALUE (tta)), TREE_VALUE (tta), + TREE_VALUE (ttf)); +#endif + + h = convert_harshness_ansi (TREE_VALUE (ttf), + TREE_TYPE (TREE_VALUE (tta)), + TREE_VALUE (tta)); + +#ifdef DEBUG_MATCHING + cp_error (" evaluated %s", print_harshness (&h)); +#endif + } + + cp->v.ansi_harshness[strike_index] = h; + if ((h.code & EVIL_CODE) + || ((h.code & STD_CODE) && h.distance < 0)) + { + cp->u.bad_arg = strike_index; + evil_strikes = 1; + } + else if (h.code & ELLIPSIS_CODE) + ellipsis_strikes += 1; +#if 0 + /* This is never set by `convert_harshness_ansi'. */ + else if (h.code & USER_CODE) + { + user_strikes += 1; + } +#endif + else + { + if ((h.code & STD_CODE) && h.distance) + { + if (h.distance > b_or_d_strikes) + b_or_d_strikes = h.distance; + } + else + easy_strikes += (h.code & (STD_CODE|PROMO_CODE|TRIVIAL_CODE)); + cp->h.code |= h.code; + /* Make sure we communicate this. */ + cp->h.int_penalty += h.int_penalty; + } + + ttf = TREE_CHAIN (ttf); + tta = TREE_CHAIN (tta); + strike_index += 1; + } + + if (tta) + { + /* ran out of formals, and parmlist is fixed size. */ + if (ttf /* == void_type_node */) + { + cp->h.code = EVIL_CODE; + cp->u.bad_arg = -1; + return; + } + else + { + struct harshness_code h; + int l = list_length (tta); + ellipsis_strikes += l; + h.code = ELLIPSIS_CODE; + h.distance = 0; + h.int_penalty = 0; + for (; l; --l) + cp->v.ansi_harshness[strike_index++] = h; + } + } + else if (ttf && ttf != void_list_node) + { + /* ran out of actuals, and no defaults. */ + if (TREE_PURPOSE (ttf) == NULL_TREE) + { + cp->h.code = EVIL_CODE; + cp->u.bad_arg = -2; + return; + } + /* Store index of first default. */ + cp->v.ansi_harshness[arglen].distance = strike_index+1; + } + else + cp->v.ansi_harshness[arglen].distance = 0; + + /* Argument list lengths work out, so don't need to check them again. */ + if (evil_strikes) + { + /* We do not check for derived->base conversions here, since in + no case would they give evil strike counts, unless such conversions + are somehow ambiguous. */ + + /* See if any user-defined conversions apply. + But make sure that we do not loop. */ + static int dont_convert_types = 0; + + if (dont_convert_types) + { + cp->h.code = EVIL_CODE; + return; + } + + win = 0; /* Only get one chance to win. */ + ttf = TYPE_ARG_TYPES (TREE_TYPE (function)); + tta = tta_in; + strike_index = 0; + evil_strikes = 0; + + while (ttf && tta) + { + if (ttf == void_list_node) + break; + + lose = cp->v.ansi_harshness[strike_index]; + if ((lose.code & EVIL_CODE) + || ((lose.code & STD_CODE) && lose.distance < 0)) + { + tree actual_type = TREE_TYPE (TREE_VALUE (tta)); + tree formal_type = TREE_VALUE (ttf); + + dont_convert_types = 1; + + if (TREE_CODE (formal_type) == REFERENCE_TYPE) + formal_type = TREE_TYPE (formal_type); + if (TREE_CODE (actual_type) == REFERENCE_TYPE) + actual_type = TREE_TYPE (actual_type); + + if (formal_type != error_mark_node + && actual_type != error_mark_node) + { + formal_type = TYPE_MAIN_VARIANT (formal_type); + actual_type = TYPE_MAIN_VARIANT (actual_type); + + if (TYPE_HAS_CONSTRUCTOR (formal_type)) + { + /* If it has a constructor for this type, + try to use it. */ + /* @@ There is no way to save this result yet, so + success is a NULL_TREE for now. */ + if (convert_to_aggr (formal_type, TREE_VALUE (tta), 0, 1) + != error_mark_node) + win++; + } + if (TYPE_LANG_SPECIFIC (actual_type) + && TYPE_HAS_CONVERSION (actual_type)) + { + if (TREE_CODE (formal_type) == INTEGER_TYPE + && TYPE_HAS_INT_CONVERSION (actual_type)) + win++; + else if (TREE_CODE (formal_type) == REAL_TYPE + && TYPE_HAS_REAL_CONVERSION (actual_type)) + win++; + else + { + tree conv; + /* Don't issue warnings since we're only groping + around for the right answer, we haven't yet + committed to going with this solution. */ + int old_inhibit_warnings = inhibit_warnings; + + inhibit_warnings = 1; + conv = build_type_conversion (CALL_EXPR, TREE_VALUE (ttf), TREE_VALUE (tta), 0); + inhibit_warnings = old_inhibit_warnings; + + if (conv) + { + if (conv == error_mark_node) + win += 2; + else + win++; + } + else if (TREE_CODE (TREE_VALUE (ttf)) == REFERENCE_TYPE) + { + conv = build_type_conversion (CALL_EXPR, formal_type, TREE_VALUE (tta), 0); + if (conv) + { + if (conv == error_mark_node) + win += 2; + else + win++; + } + } + } + } + } + dont_convert_types = 0; + + if (win == 1) + { + user_strikes += 1; + cp->v.ansi_harshness[strike_index].code = USER_CODE; + win = 0; + } + else + { + if (cp->u.bad_arg > strike_index) + cp->u.bad_arg = strike_index; + + evil_strikes = win ? 2 : 1; + break; + } + } + + ttf = TREE_CHAIN (ttf); + tta = TREE_CHAIN (tta); + strike_index += 1; + } + } + + /* Const member functions get a small penalty because defaulting + to const is less useful than defaulting to non-const. */ + /* This is bogus, it does not correspond to anything in the ARM. + This code will be fixed when this entire section is rewritten + to conform to the ARM. (mrs) */ + if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE) + { + tree this_parm = TREE_VALUE (ttf_in); + + if (TREE_CODE (this_parm) == RECORD_TYPE /* Is `this' a sig ptr? */ + ? TYPE_READONLY (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (this_parm)))) + : TYPE_READONLY (TREE_TYPE (this_parm))) + { + cp->v.ansi_harshness[0].code |= TRIVIAL_CODE; + ++easy_strikes; + } + else + { + /* Calling a non-const member function from a const member function + is probably invalid, but for now we let it only draw a warning. + We indicate that such a mismatch has occurred by setting the + harshness to a maximum value. */ + if (TREE_CODE (TREE_TYPE (TREE_VALUE (tta_in))) == POINTER_TYPE + && (TYPE_READONLY (TREE_TYPE (TREE_TYPE (TREE_VALUE (tta_in)))))) + cp->v.ansi_harshness[0].code |= CONST_CODE; + } + } + + if (evil_strikes) + cp->h.code = EVIL_CODE; + if (ellipsis_strikes) + cp->h.code |= ELLIPSIS_CODE; + if (user_strikes) + cp->h.code |= USER_CODE; +#ifdef DEBUG_MATCHING + cp_error ("final eval %s", print_harshness (&cp->h)); +#endif +} + +void +compute_conversion_costs_old (function, tta_in, cp, arglen) + tree function; + tree tta_in; + struct candidate *cp; + int arglen; +{ + tree ttf_in = TYPE_ARG_TYPES (TREE_TYPE (function)); + tree ttf = ttf_in; + tree tta = tta_in; + + /* Start out with no strikes against. */ + int evil_strikes = 0; + int ellipsis_strikes = 0; + int user_strikes = 0; + int b_or_d_strikes = 0; + int easy_strikes = 0; + + int strike_index = 0, win, lose; + +#ifdef GATHER_STATISTICS + n_compute_conversion_costs++; +#endif + + cp->function = function; + cp->arg = tta ? TREE_VALUE (tta) : NULL_TREE; + cp->u.bad_arg = 0; /* optimistic! */ + + bzero (cp->v.old_harshness, (cp->h_len + 1) * sizeof (unsigned short)); + + while (ttf && tta) + { + int harshness; + + if (ttf == void_list_node) + break; + + if (type_unknown_p (TREE_VALUE (tta))) + { + /* Must perform some instantiation here. */ + tree rhs = TREE_VALUE (tta); + tree lhstype = TREE_VALUE (ttf); + + /* Keep quiet about possible contravariance violations. */ + int old_inhibit_warnings = inhibit_warnings; + inhibit_warnings = 1; + + /* @@ This is to undo what `grokdeclarator' does to + parameter types. It really should go through + something more general. */ + + TREE_TYPE (tta) = unknown_type_node; + rhs = instantiate_type (lhstype, rhs, 0); + inhibit_warnings = old_inhibit_warnings; + + if (TREE_CODE (rhs) == ERROR_MARK) + harshness = 1; + else + { + harshness = convert_harshness_old (lhstype, TREE_TYPE (rhs), + rhs); + /* harshness |= 2; */ + } + } + else + harshness = convert_harshness_old (TREE_VALUE (ttf), + TREE_TYPE (TREE_VALUE (tta)), + TREE_VALUE (tta)); + + cp->v.old_harshness[strike_index] = harshness; + if (EVIL_HARSHNESS (harshness) + || CONTRAVARIANT_HARSHNESS (harshness)) + { + cp->u.bad_arg = strike_index; + evil_strikes = 1; + } + else if (ELLIPSIS_HARSHNESS (harshness)) + { + ellipsis_strikes += 1; + } +#if 0 + /* This is never set by `convert_harshness_old'. */ + else if (USER_HARSHNESS (harshness)) + { + user_strikes += 1; + } +#endif + else if (BASE_DERIVED_HARSHNESS (harshness)) + { + b_or_d_strikes += INT_FROM_BD_HARSHNESS (harshness); + } + else + easy_strikes += INT_FROM_EASY_HARSHNESS (harshness); + ttf = TREE_CHAIN (ttf); + tta = TREE_CHAIN (tta); + strike_index += 1; + } + + if (tta) + { + /* ran out of formals, and parmlist is fixed size. */ + if (ttf /* == void_type_node */) + { + cp->evil = 1; + cp->u.bad_arg = -1; + return; + } + else ellipsis_strikes += list_length (tta); + } + else if (ttf && ttf != void_list_node) + { + /* ran out of actuals, and no defaults. */ + if (TREE_PURPOSE (ttf) == NULL_TREE) + { + cp->evil = 1; + cp->u.bad_arg = -2; + return; + } + /* Store index of first default. */ + cp->v.old_harshness[arglen] = strike_index+1; + } + else + cp->v.old_harshness[arglen] = 0; + + /* Argument list lengths work out, so don't need to check them again. */ + if (evil_strikes) + { + /* We do not check for derived->base conversions here, since in + no case would they give evil strike counts, unless such conversions + are somehow ambiguous. */ + + /* See if any user-defined conversions apply. + But make sure that we do not loop. */ + static int dont_convert_types = 0; + + if (dont_convert_types) + { + cp->evil = 1; + return; + } + + win = 0; /* Only get one chance to win. */ + ttf = TYPE_ARG_TYPES (TREE_TYPE (function)); + tta = tta_in; + strike_index = 0; + evil_strikes = 0; + + while (ttf && tta) + { + if (ttf == void_list_node) + break; + + lose = cp->v.old_harshness[strike_index]; + if (EVIL_HARSHNESS (lose) + || CONTRAVARIANT_HARSHNESS (lose)) + { + tree actual_type = TREE_TYPE (TREE_VALUE (tta)); + tree formal_type = TREE_VALUE (ttf); + + dont_convert_types = 1; + + if (TREE_CODE (formal_type) == REFERENCE_TYPE) + formal_type = TREE_TYPE (formal_type); + if (TREE_CODE (actual_type) == REFERENCE_TYPE) + actual_type = TREE_TYPE (actual_type); + + if (formal_type != error_mark_node + && actual_type != error_mark_node) + { + formal_type = TYPE_MAIN_VARIANT (formal_type); + actual_type = TYPE_MAIN_VARIANT (actual_type); + + if (TYPE_HAS_CONSTRUCTOR (formal_type)) + { + /* If it has a constructor for this type, try to use it. */ + if (convert_to_aggr (formal_type, TREE_VALUE (tta), 0, 1) + != error_mark_node) + { + /* @@ There is no way to save this result yet. + @@ So success is NULL_TREE for now. */ + win++; + } + } + if (TYPE_LANG_SPECIFIC (actual_type) && TYPE_HAS_CONVERSION (actual_type)) + { + if (TREE_CODE (formal_type) == INTEGER_TYPE + && TYPE_HAS_INT_CONVERSION (actual_type)) + win++; + else if (TREE_CODE (formal_type) == REAL_TYPE + && TYPE_HAS_REAL_CONVERSION (actual_type)) + win++; + else + { + tree conv = build_type_conversion (CALL_EXPR, TREE_VALUE (ttf), TREE_VALUE (tta), 0); + if (conv) + { + if (conv == error_mark_node) + win += 2; + else + win++; + } + else if (TREE_CODE (TREE_VALUE (ttf)) == REFERENCE_TYPE) + { + conv = build_type_conversion (CALL_EXPR, formal_type, TREE_VALUE (tta), 0); + if (conv) + { + if (conv == error_mark_node) + win += 2; + else + win++; + } + } + } + } + } + dont_convert_types = 0; + + if (win == 1) + { + user_strikes += 1; + cp->v.old_harshness[strike_index] = USER_HARSHNESS (-1); + win = 0; + } + else + { + if (cp->u.bad_arg > strike_index) + cp->u.bad_arg = strike_index; + + evil_strikes = win ? 2 : 1; + break; + } + } + + ttf = TREE_CHAIN (ttf); + tta = TREE_CHAIN (tta); + strike_index += 1; + } + } + + /* Const member functions get a small penalty because defaulting + to const is less useful than defaulting to non-const. */ + /* This is bogus, it does not correspond to anything in the ARM. + This code will be fixed when this entire section is rewritten + to conform to the ARM. (mrs) */ + if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE) + { + tree this_parm = TREE_VALUE (ttf_in); + + if (TREE_CODE (this_parm) == RECORD_TYPE /* Is `this' a sig ptr? */ + ? TYPE_READONLY (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (this_parm)))) + : TYPE_READONLY (TREE_TYPE (this_parm))) + { + cp->v.old_harshness[0] += INT_TO_EASY_HARSHNESS (1); + ++easy_strikes; + } + else + { + /* Calling a non-const member function from a const member function + is probably invalid, but for now we let it only draw a warning. + We indicate that such a mismatch has occurred by setting the + harshness to a maximum value. */ + if (TREE_CODE (TREE_TYPE (TREE_VALUE (tta_in))) == POINTER_TYPE + && (TYPE_READONLY (TREE_TYPE (TREE_TYPE (TREE_VALUE (tta_in)))))) + cp->v.old_harshness[0] |= CONST_HARSHNESS (-1); + } + } + + cp->evil = evil_strikes; + cp->ellipsis = ellipsis_strikes; + cp->user = user_strikes; + cp->b_or_d = b_or_d_strikes; + cp->easy = easy_strikes; +} + +void +compute_conversion_costs (function, tta_in, cp, arglen) + tree function; + tree tta_in; + struct candidate *cp; + int arglen; +{ + if (flag_ansi_overloading) + compute_conversion_costs_ansi (function, tta_in, cp, arglen); + else + compute_conversion_costs_old (function, tta_in, cp, arglen); +} + +/* When one of several possible overloaded functions and/or methods + can be called, choose the best candidate for overloading. + + BASETYPE is the context from which we start method resolution + or NULL if we are comparing overloaded functions. + CANDIDATES is the array of candidates we have to choose from. + N_CANDIDATES is the length of CANDIDATES. + PARMS is a TREE_LIST of parameters to the function we'll ultimately + choose. It is modified in place when resolving methods. It is not + modified in place when resolving overloaded functions. + LEN is the length of the parameter list. */ + +static struct candidate * +ideal_candidate_old (basetype, candidates, n_candidates, parms, len) + tree basetype; + struct candidate *candidates; + int n_candidates; + tree parms; + int len; +{ + struct candidate *cp = candidates + n_candidates; + int index, i; + tree ttf; + + qsort (candidates, /* char *base */ + n_candidates, /* int nel */ + sizeof (struct candidate), /* int width */ + rank_for_overload); /* int (*compar)() */ + + /* If the best candidate requires user-defined conversions, + and its user-defined conversions are a strict subset + of all other candidates requiring user-defined conversions, + then it is, in fact, the best. */ + for (i = -1; cp + i != candidates; i--) + if (cp[i].user == 0) + break; + + if (i < -1) + { + tree ttf0; + + /* Check that every other candidate requires those conversions + as a strict subset of their conversions. */ + if (cp[i].user == cp[-1].user) + goto non_subset; + + /* Look at subset relationship more closely. */ + while (i != -1) + { + for (ttf = TYPE_ARG_TYPES (TREE_TYPE (cp[i].function)), + ttf0 = TYPE_ARG_TYPES (TREE_TYPE (cp[-1].function)), + index = 0; index < len; index++) + { + if (USER_HARSHNESS (cp[i].v.old_harshness[index])) + { + /* If our "best" candidate also needs a conversion, + it must be the same one. */ + if (USER_HARSHNESS (cp[-1].v.old_harshness[index]) + && TREE_VALUE (ttf) != TREE_VALUE (ttf0)) + goto non_subset; + } + ttf = TREE_CHAIN (ttf); + ttf0 = TREE_CHAIN (ttf0); + /* Handle `...' gracefully. */ + if (ttf == NULL_TREE || ttf0 == NULL_TREE) + break; + } + i++; + } + /* The best was the best. */ + return cp - 1; + non_subset: + /* Use other rules for determining "bestness". */ + ; + } + + /* If the best two candidates we find require user-defined + conversions, we may need to report and error message. */ + if (cp[-1].user && cp[-2].user + && (cp[-1].b_or_d || cp[-2].b_or_d == 0)) + { + /* If the best two methods found involved user-defined + type conversions, then we must see whether one + of them is exactly what we wanted. If not, then + we have an ambiguity. */ + int best = 0; + tree tta = parms; + tree f1; +#if 0 + /* for LUCID */ + tree p1; +#endif + + /* Stash all of our parameters in safe places + so that we can perform type conversions in place. */ + while (tta) + { + TREE_PURPOSE (tta) = TREE_VALUE (tta); + tta = TREE_CHAIN (tta); + } + + i = 0; + do + { + int exact_conversions = 0; + + i -= 1; + tta = parms; + if (DECL_STATIC_FUNCTION_P (cp[i].function)) + tta = TREE_CHAIN (tta); + /* special note, we don't go through len parameters, because we + may only need len-1 parameters because of a call to a static + member. */ + for (ttf = TYPE_ARG_TYPES (TREE_TYPE (cp[i].function)), index = 0; + tta; + tta = TREE_CHAIN (tta), ttf = TREE_CHAIN (ttf), index++) + { + /* If this is a varargs function, there's no conversion to do, + but don't accept an arg that needs a copy ctor. */ + if (ttf == NULL_TREE) + { + /* FIXME: verify that we cannot get here with an + arg that needs a ctor. */ + break; + } + + if (USER_HARSHNESS (cp[i].v.old_harshness[index])) + { + tree this_parm = build_type_conversion (CALL_EXPR, TREE_VALUE (ttf), TREE_PURPOSE (tta), 2); + if (basetype != NULL_TREE) + TREE_VALUE (tta) = this_parm; + if (this_parm) + { + if (TREE_CODE (this_parm) != CONVERT_EXPR + && (TREE_CODE (this_parm) != NOP_EXPR + || comp_target_types (TREE_TYPE (this_parm), + TREE_TYPE (TREE_OPERAND (this_parm, 0)), 1))) + exact_conversions += 1; + } + else if (PROMOTES_TO_AGGR_TYPE (TREE_VALUE (ttf), REFERENCE_TYPE)) + { + /* To get here we had to have succeeded via + a constructor. */ + TREE_VALUE (tta) = TREE_PURPOSE (tta); + exact_conversions += 1; + } + } + } + if (exact_conversions == cp[i].user) + { + if (best == 0) + { + best = i; + f1 = cp[best].function; +#if 0 + /* For LUCID */ + p1 = TYPE_ARG_TYPES (TREE_TYPE (f1)); +#endif + } + else + { + /* Don't complain if next best is from base class. */ + tree f2 = cp[i].function; + + if (TREE_CODE (TREE_TYPE (f1)) == METHOD_TYPE + && TREE_CODE (TREE_TYPE (f2)) == METHOD_TYPE + && BASE_DERIVED_HARSHNESS (cp[i].v.old_harshness[0]) + && cp[best].v.old_harshness[0] < cp[i].v.old_harshness[0]) + { +#if 0 + tree p2 = TYPE_ARG_TYPES (TREE_TYPE (f2)); + /* For LUCID. */ + if (! compparms (TREE_CHAIN (p1), TREE_CHAIN (p2), 1)) + goto ret0; + else +#endif + continue; + } + else + { + /* Ensure that there's nothing ambiguous about these + two fns. */ + int identical = 1; + for (index = 0; index < len; index++) + { + /* Type conversions must be piecewise equivalent. */ + if (USER_HARSHNESS (cp[best].v.old_harshness[index]) + != USER_HARSHNESS (cp[i].v.old_harshness[index])) + goto ret0; + /* If there's anything we like better about the + other function, consider it ambiguous. */ + if (cp[i].v.old_harshness[index] < cp[best].v.old_harshness[index]) + goto ret0; + /* If any single one it diffent, then the whole is + not identical. */ + if (cp[i].v.old_harshness[index] != cp[best].v.old_harshness[index]) + identical = 0; + } + + /* If we can't tell the difference between the two, it + is ambiguous. */ + if (identical) + goto ret0; + + /* If we made it to here, it means we're satisfied that + BEST is still best. */ + continue; + } + } + } + } while (cp + i != candidates); + + if (best) + { + int exact_conversions = cp[best].user; + tta = parms; + if (DECL_STATIC_FUNCTION_P (cp[best].function)) + tta = TREE_CHAIN (parms); + for (ttf = TYPE_ARG_TYPES (TREE_TYPE (cp[best].function)), index = 0; + exact_conversions > 0; + tta = TREE_CHAIN (tta), ttf = TREE_CHAIN (ttf), index++) + { + if (USER_HARSHNESS (cp[best].v.old_harshness[index])) + { + /* We must now fill in the slot we left behind. + @@ This could be optimized to use the value previously + @@ computed by build_type_conversion in some cases. */ + if (basetype != NULL_TREE) + TREE_VALUE (tta) = convert (TREE_VALUE (ttf), TREE_PURPOSE (tta)); + exact_conversions -= 1; + } + else + TREE_VALUE (tta) = TREE_PURPOSE (tta); + } + return cp + best; + } + goto ret0; + } + /* If the best two candidates we find both use default parameters, + we may need to report and error. Don't need to worry if next-best + candidate is forced to use user-defined conversion when best is not. */ + if (cp[-2].user == 0 + && cp[-1].v.old_harshness[len] != 0 && cp[-2].v.old_harshness[len] != 0) + { + tree tt1 = TYPE_ARG_TYPES (TREE_TYPE (cp[-1].function)); + tree tt2 = TYPE_ARG_TYPES (TREE_TYPE (cp[-2].function)); + unsigned i = cp[-1].v.old_harshness[len]; + + if (cp[-2].v.old_harshness[len] < i) + i = cp[-2].v.old_harshness[len]; + while (--i > 0) + { + if (TYPE_MAIN_VARIANT (TREE_VALUE (tt1)) + != TYPE_MAIN_VARIANT (TREE_VALUE (tt2))) + /* These lists are not identical, so we can choose our best candidate. */ + return cp - 1; + tt1 = TREE_CHAIN (tt1); + tt2 = TREE_CHAIN (tt2); + } + /* To get here, both lists had the same parameters up to the defaults + which were used. This is an ambiguous request. */ + goto ret0; + } + + /* Otherwise, return our best candidate. Note that if we get candidates + from independent base classes, we have an ambiguity, even if one + argument list look a little better than another one. */ + if (cp[-1].b_or_d && basetype && TYPE_USES_MULTIPLE_INHERITANCE (basetype)) + { + int i = n_candidates - 1, best = i; + tree base1 = NULL_TREE; + + if (TREE_CODE (TREE_TYPE (candidates[i].function)) == FUNCTION_TYPE) + return cp - 1; + + for (; i >= 0 && candidates[i].user == 0 && candidates[i].evil == 0; i--) + { + if (TREE_CODE (TREE_TYPE (candidates[i].function)) == METHOD_TYPE) + { + tree newbase = DECL_CLASS_CONTEXT (candidates[i].function); + + if (base1 != NULL_TREE) + { + /* newbase could be a base or a parent of base1 */ + if (newbase != base1 && ! UNIQUELY_DERIVED_FROM_P (newbase, base1) + && ! UNIQUELY_DERIVED_FROM_P (base1, newbase)) + { + cp_error ("ambiguous request for function from distinct base classes of type `%T'", basetype); + cp_error_at (" first candidate is `%#D'", + candidates[best].function); + cp_error_at (" second candidate is `%#D'", + candidates[i].function); + cp[-1].evil = 1; + return cp - 1; + } + } + else + { + best = i; + base1 = newbase; + } + } + else + return cp - 1; + } + } + + /* Don't accept a candidate as being ideal if it's indistinguishable + from another candidate. */ + if (rank_for_overload (cp-1, cp-2) == 0) + { + /* If the types are distinguishably different (like + `long' vs. `unsigned long'), that's ok. But if they are arbitrarily + different, such as `int (*)(void)' vs. `void (*)(int)', + that's not ok. */ + tree p1 = TYPE_ARG_TYPES (TREE_TYPE (cp[-1].function)); + tree p2 = TYPE_ARG_TYPES (TREE_TYPE (cp[-2].function)); + while (p1 && p2) + { + if (TREE_CODE (TREE_VALUE (p1)) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (TREE_VALUE (p1))) == FUNCTION_TYPE + && TREE_VALUE (p1) != TREE_VALUE (p2)) + return NULL; + p1 = TREE_CHAIN (p1); + p2 = TREE_CHAIN (p2); + } + if (p1 || p2) + return NULL; + } + + return cp - 1; + + ret0: + /* In the case where there is no ideal candidate, restore + TREE_VALUE slots of PARMS from TREE_PURPOSE slots. */ + while (parms) + { + TREE_VALUE (parms) = TREE_PURPOSE (parms); + parms = TREE_CHAIN (parms); + } + return NULL; +} + +/* Subroutine of ideal_candidate. See if X or Y is a better match + than the other. */ +static int +strictly_better (x, y) + unsigned short x, y; +{ + unsigned short xor; + + if (x == y) + return 0; + + xor = x ^ y; + if (xor >= x || xor >= y) + return 1; + return 0; +} + +static struct candidate * +ideal_candidate_ansi (basetype, candidates, n_candidates, parms, len) + tree basetype; + struct candidate *candidates; + int n_candidates; + tree parms; + int len; +{ + struct candidate *cp = candidates+n_candidates; + int i, j = -1, best_code; + + /* For each argument, sort the functions from best to worst for the arg. + For each function that's not best for this arg, set its overall + harshness to EVIL so that other args won't like it. The candidate + list for the last argument is the intersection of all the best-liked + functions. */ + +#if 0 + for (i = 0; i < len; i++) + { + qsort (candidates, n_candidates, sizeof (struct candidate), + rank_for_overload); + best_code = cp[-1].h.code; + + /* To find out functions that are worse than that represented + by BEST_CODE, we can't just do a comparison like h.code>best_code. + The total harshness for the "best" fn may be 8|8 for two args, and + the harshness for the next-best may be 8|2. If we just compared, + that would be checking 8>10, which would lead to the next-best + being disqualified. What we actually want to do is get rid + of functions that are definitely worse than that represented + by best_code, i.e. those which have bits set higher than the + highest in best_code. Sooooo, what we do is clear out everything + represented by best_code, and see if we still come up with something + higher. If so (e.g., 8|8 vs 8|16), it'll disqualify it properly. */ + for (j = n_candidates-2; j >= 0; j--) + if ((candidates[j].h.code & ~best_code) > best_code) + candidates[j].h.code = EVIL_CODE; + } + + if (cp[-1].h.code & EVIL_CODE) + return NULL; +#else + qsort (candidates, n_candidates, sizeof (struct candidate), + rank_for_overload); + best_code = cp[-1].h.code; +#endif + + /* If they're at least as good as each other, do an arg-by-arg check. */ + if (! strictly_better (cp[-1].h.code, cp[-2].h.code)) + { + int better = 0; + int worse = 0; + + for (j = 0; j < n_candidates; j++) + if (! strictly_better (candidates[j].h.code, best_code)) + break; + + qsort (candidates+j, n_candidates-j, sizeof (struct candidate), + rank_for_ideal); + for (i = 0; i < len; i++) + { + if (cp[-1].v.ansi_harshness[i].code < cp[-2].v.ansi_harshness[i].code) + better = 1; + else if (cp[-1].v.ansi_harshness[i].code > cp[-2].v.ansi_harshness[i].code) + worse = 1; + else if (cp[-1].v.ansi_harshness[i].code & STD_CODE) + { + /* If it involves a standard conversion, let the + inheritance lattice be the final arbiter. */ + if (cp[-1].v.ansi_harshness[i].distance > cp[-2].v.ansi_harshness[i].distance) + worse = 1; + else if (cp[-1].v.ansi_harshness[i].distance < cp[-2].v.ansi_harshness[i].distance) + better = 1; + } + else if (cp[-1].v.ansi_harshness[i].code & PROMO_CODE) + { + /* For integral promotions, take into account a finer + granularity for determining which types should be favored + over others in such promotions. */ + if (cp[-1].v.ansi_harshness[i].int_penalty > cp[-2].v.ansi_harshness[i].int_penalty) + worse = 1; + else if (cp[-1].v.ansi_harshness[i].int_penalty < cp[-2].v.ansi_harshness[i].int_penalty) + better = 1; + } + } + + if (! better || worse) + return NULL; + } + return cp-1; +} + +static struct candidate * +ideal_candidate (basetype, candidates, n_candidates, parms, len) + tree basetype; + struct candidate *candidates; + int n_candidates; + tree parms; + int len; +{ + if (flag_ansi_overloading) + return ideal_candidate_ansi (basetype, candidates, n_candidates, parms, + len); + else + return ideal_candidate_old (basetype, candidates, n_candidates, parms, + len); +} + +/* Assume that if the class referred to is not in the + current class hierarchy, that it may be remote. + PARENT is assumed to be of aggregate type here. */ +static int +may_be_remote (parent) + tree parent; +{ + if (TYPE_OVERLOADS_METHOD_CALL_EXPR (parent) == 0) + return 0; + + if (current_class_type == NULL_TREE) + return 0; + + if (parent == current_class_type) + return 0; + + if (UNIQUELY_DERIVED_FROM_P (parent, current_class_type)) + return 0; + return 1; +} + +tree +build_vfield_ref (datum, type) + tree datum, type; +{ + tree rval; + int old_assume_nonnull_objects = flag_assume_nonnull_objects; + + if (datum == error_mark_node) + return error_mark_node; + + /* Vtable references are always made from non-null objects. */ + flag_assume_nonnull_objects = 1; + if (TREE_CODE (TREE_TYPE (datum)) == REFERENCE_TYPE) + datum = convert_from_reference (datum); + + if (! TYPE_USES_COMPLEX_INHERITANCE (type)) + rval = build (COMPONENT_REF, TREE_TYPE (CLASSTYPE_VFIELD (type)), + datum, CLASSTYPE_VFIELD (type)); + else + rval = build_component_ref (datum, DECL_NAME (CLASSTYPE_VFIELD (type)), 0, 0); + flag_assume_nonnull_objects = old_assume_nonnull_objects; + + return rval; +} + +/* Build a call to a member of an object. I.e., one that overloads + operator ()(), or is a pointer-to-function or pointer-to-method. */ +static tree +build_field_call (basetype_path, instance_ptr, name, parms) + tree basetype_path, instance_ptr, name, parms; +{ + tree field, instance; + + if (instance_ptr == current_class_decl) + { + /* Check to see if we really have a reference to an instance variable + with `operator()()' overloaded. */ + field = IDENTIFIER_CLASS_VALUE (name); + + if (field == NULL_TREE) + { + cp_error ("`this' has no member named `%D'", name); + return error_mark_node; + } + + if (TREE_CODE (field) == FIELD_DECL) + { + /* If it's a field, try overloading operator (), + or calling if the field is a pointer-to-function. */ + instance = build_component_ref_1 (C_C_D, field, 0); + if (instance == error_mark_node) + return error_mark_node; + + if (TYPE_LANG_SPECIFIC (TREE_TYPE (instance)) + && TYPE_OVERLOADS_CALL_EXPR (TREE_TYPE (instance))) + return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, instance, parms, NULL_TREE); + + if (TREE_CODE (TREE_TYPE (instance)) == POINTER_TYPE) + { + if (TREE_CODE (TREE_TYPE (TREE_TYPE (instance))) == FUNCTION_TYPE) + return build_function_call (instance, parms); + else if (TREE_CODE (TREE_TYPE (TREE_TYPE (instance))) == METHOD_TYPE) + return build_function_call (instance, tree_cons (NULL_TREE, current_class_decl, parms)); + } + } + return NULL_TREE; + } + + /* Check to see if this is not really a reference to an instance variable + with `operator()()' overloaded. */ + field = lookup_field (basetype_path, name, 1, 0); + + /* This can happen if the reference was ambiguous or for access + violations. */ + if (field == error_mark_node) + return error_mark_node; + + if (field) + { + tree basetype; + tree ftype = TREE_TYPE (field); + + if (TREE_CODE (ftype) == REFERENCE_TYPE) + ftype = TREE_TYPE (ftype); + + if (TYPE_LANG_SPECIFIC (ftype) && TYPE_OVERLOADS_CALL_EXPR (ftype)) + { + /* Make the next search for this field very short. */ + basetype = DECL_FIELD_CONTEXT (field); + instance_ptr = convert_pointer_to (basetype, instance_ptr); + + instance = build_indirect_ref (instance_ptr, NULL_PTR); + return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, + build_component_ref_1 (instance, field, 0), + parms, NULL_TREE); + } + if (TREE_CODE (ftype) == POINTER_TYPE) + { + if (TREE_CODE (TREE_TYPE (ftype)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (ftype)) == METHOD_TYPE) + { + /* This is a member which is a pointer to function. */ + tree ref + = build_component_ref_1 (build_indirect_ref (instance_ptr, + NULL_PTR), + field, LOOKUP_COMPLAIN); + if (ref == error_mark_node) + return error_mark_node; + return build_function_call (ref, parms); + } + } + else if (TREE_CODE (ftype) == METHOD_TYPE) + { + error ("invalid call via pointer-to-member function"); + return error_mark_node; + } + else + return NULL_TREE; + } + return NULL_TREE; +} + +tree +find_scoped_type (type, inner_name, inner_types) + tree type, inner_name, inner_types; +{ + tree tags = CLASSTYPE_TAGS (type); + + while (tags) + { + /* The TREE_PURPOSE of an enum tag (which becomes a member of the + enclosing class) is set to the name for the enum type. So, if + inner_name is `bar', and we strike `baz' for `enum bar { baz }', + then this test will be true. */ + if (TREE_PURPOSE (tags) == inner_name) + { + if (inner_types == NULL_TREE) + return DECL_NESTED_TYPENAME (TYPE_NAME (TREE_VALUE (tags))); + return resolve_scope_to_name (TREE_VALUE (tags), inner_types); + } + tags = TREE_CHAIN (tags); + } + +#if 0 + /* XXX This needs to be fixed better. */ + if (TREE_CODE (type) == UNINSTANTIATED_P_TYPE) + { + sorry ("nested class lookup in template type"); + return NULL_TREE; + } +#endif + + /* Look for a TYPE_DECL. */ + for (tags = TYPE_FIELDS (type); tags; tags = TREE_CHAIN (tags)) + if (TREE_CODE (tags) == TYPE_DECL && DECL_NAME (tags) == inner_name) + { + /* Code by raeburn. */ + if (inner_types == NULL_TREE) + return DECL_NESTED_TYPENAME (tags); + return resolve_scope_to_name (TREE_TYPE (tags), inner_types); + } + + return NULL_TREE; +} + +/* Resolve an expression NAME1::NAME2::...::NAMEn to + the name that names the above nested type. INNER_TYPES + is a chain of nested type names (held together by SCOPE_REFs); + OUTER_TYPE is the type we know to enclose INNER_TYPES. + Returns NULL_TREE if there is an error. */ +tree +resolve_scope_to_name (outer_type, inner_stuff) + tree outer_type, inner_stuff; +{ + register tree tmp; + tree inner_name, inner_type; + + if (outer_type == NULL_TREE && current_class_type != NULL_TREE) + { + /* We first try to look for a nesting in our current class context, + then try any enclosing classes. */ + tree type = current_class_type; + + while (type && (TREE_CODE (type) == RECORD_TYPE + || TREE_CODE (type) == UNION_TYPE)) + { + tree rval = resolve_scope_to_name (type, inner_stuff); + + if (rval != NULL_TREE) + return rval; + type = DECL_CONTEXT (TYPE_NAME (type)); + } + } + + if (TREE_CODE (inner_stuff) == SCOPE_REF) + { + inner_name = TREE_OPERAND (inner_stuff, 0); + inner_type = TREE_OPERAND (inner_stuff, 1); + } + else + { + inner_name = inner_stuff; + inner_type = NULL_TREE; + } + + if (outer_type == NULL_TREE) + { + /* If we have something that's already a type by itself, + use that. */ + if (IDENTIFIER_HAS_TYPE_VALUE (inner_name)) + { + if (inner_type) + return resolve_scope_to_name (IDENTIFIER_TYPE_VALUE (inner_name), + inner_type); + return inner_name; + } + return NULL_TREE; + } + + if (! IS_AGGR_TYPE (outer_type)) + return NULL_TREE; + + /* Look for member classes or enums. */ + tmp = find_scoped_type (outer_type, inner_name, inner_type); + + /* If it's not a type in this class, then go down into the + base classes and search there. */ + if (! tmp && TYPE_BINFO (outer_type)) + { + tree binfos = TYPE_BINFO_BASETYPES (outer_type); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tmp = resolve_scope_to_name (BINFO_TYPE (base_binfo), inner_stuff); + if (tmp) + return tmp; + } + tmp = NULL_TREE; + } + + return tmp; +} + +/* Build a method call of the form `EXP->SCOPES::NAME (PARMS)'. + This is how virtual function calls are avoided. */ +tree +build_scoped_method_call (exp, scopes, name, parms) + tree exp, scopes, name, parms; +{ + /* Because this syntactic form does not allow + a pointer to a base class to be `stolen', + we need not protect the derived->base conversion + that happens here. + + @@ But we do have to check access privileges later. */ + tree basename = resolve_scope_to_name (NULL_TREE, scopes); + tree basetype, binfo, decl; + tree type = TREE_TYPE (exp); + + if (type == error_mark_node + || basename == NULL_TREE) + return error_mark_node; + + basetype = IDENTIFIER_TYPE_VALUE (basename); + + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + /* Destructors can be "called" for simple types; see 5.2.4 and 12.4 Note + that explicit ~int is caught in the parser; this deals with typedefs + and template parms. */ + if (TREE_CODE (name) == BIT_NOT_EXPR && ! is_aggr_typedef (basename, 0)) + { + if (type != basetype) + cp_error ("type of `%E' does not match destructor type `%T' (type was `%T')", + exp, basetype, type); + name = IDENTIFIER_TYPE_VALUE (TREE_OPERAND (name, 0)); + if (basetype != name) + cp_error ("qualified type `%T' does not match destructor type `%T'", + basetype, name); + return void_zero_node; + } + + if (! is_aggr_typedef (basename, 1)) + return error_mark_node; + + if (! IS_AGGR_TYPE (type)) + { + cp_error ("base object `%E' of scoped method call is of non-aggregate type `%T'", + exp, type); + return error_mark_node; + } + + if (binfo = binfo_or_else (basetype, type)) + { + if (binfo == error_mark_node) + return error_mark_node; + if (TREE_CODE (exp) == INDIRECT_REF) + decl = build_indirect_ref (convert_pointer_to (binfo, + build_unary_op (ADDR_EXPR, exp, 0)), NULL_PTR); + else + decl = build_scoped_ref (exp, scopes); + + /* Call to a destructor. */ + if (TREE_CODE (name) == BIT_NOT_EXPR) + { + /* Explicit call to destructor. */ + name = TREE_OPERAND (name, 0); + if (TREE_TYPE (decl) != + (IDENTIFIER_CLASS_VALUE (name) + ? IDENTIFIER_CLASS_TYPE_VALUE (name) + : IDENTIFIER_TYPE_VALUE (name))) + { + cp_error + ("qualified type `%T' does not match destructor type `%T'", + TREE_TYPE (decl), name); + return error_mark_node; + } + if (! TYPE_HAS_DESTRUCTOR (TREE_TYPE (decl))) + return void_zero_node; + + return build_delete (TREE_TYPE (decl), decl, integer_two_node, + LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, + 0); + } + + /* Call to a method. */ + return build_method_call (decl, name, parms, NULL_TREE, + LOOKUP_NORMAL|LOOKUP_NONVIRTUAL); + } + return error_mark_node; +} + +static void +print_candidates (candidates) + tree candidates; +{ + cp_error_at ("candidates are: %D", TREE_VALUE (candidates)); + candidates = TREE_CHAIN (candidates); + + while (candidates) + { + cp_error_at (" %D", TREE_VALUE (candidates)); + candidates = TREE_CHAIN (candidates); + } +} + +static void +print_n_candidates (candidates, n) + struct candidate *candidates; + int n; +{ + int i; + + cp_error_at ("candidates are: %D", candidates[0].function); + for (i = 1; i < n; i++) + cp_error_at (" %D", candidates[i].function); +} + +/* Build something of the form ptr->method (args) + or object.method (args). This can also build + calls to constructors, and find friends. + + Member functions always take their class variable + as a pointer. + + INSTANCE is a class instance. + + NAME is the name of the method desired, usually an IDENTIFIER_NODE. + + PARMS help to figure out what that NAME really refers to. + + BASETYPE_PATH, if non-NULL, contains a chain from the type of INSTANCE + down to the real instance type to use for access checking. We need this + information to get protected accesses correct. This parameter is used + by build_member_call. + + FLAGS is the logical disjunction of zero or more LOOKUP_ + flags. See cp-tree.h for more info. + + If this is all OK, calls build_function_call with the resolved + member function. + + This function must also handle being called to perform + initialization, promotion/coercion of arguments, and + instantiation of default parameters. + + Note that NAME may refer to an instance variable name. If + `operator()()' is defined for the type of that field, then we return + that result. */ +tree +build_method_call (instance, name, parms, basetype_path, flags) + tree instance, name, parms, basetype_path; + int flags; +{ + register tree function, fntype, value_type; + register tree basetype, save_basetype; + register tree baselink, result, method_name, parmtypes, parm; + tree last; + int pass; + enum access_type access = access_public; + + /* Range of cases for vtable optimization. */ + enum vtable_needs { not_needed, maybe_needed, unneeded, needed }; + enum vtable_needs need_vtbl = not_needed; + + char *name_kind; + int ever_seen = 0; + tree instance_ptr = NULL_TREE; + int all_virtual = flag_all_virtual; + int static_call_context = 0; + tree found_fns = NULL_TREE; + + /* Keep track of `const' and `volatile' objects. */ + int constp, volatilep; + +#ifdef GATHER_STATISTICS + n_build_method_call++; +#endif + + if (instance == error_mark_node + || name == error_mark_node + || parms == error_mark_node + || (instance != NULL_TREE && TREE_TYPE (instance) == error_mark_node)) + return error_mark_node; + + /* This is the logic that magically deletes the second argument to + operator delete, if it is not needed. */ + if (name == ansi_opname[(int) DELETE_EXPR] && list_length (parms)==2) + { + tree save_last = TREE_CHAIN (parms); + tree result; + /* get rid of unneeded argument */ + TREE_CHAIN (parms) = NULL_TREE; + result = build_method_call (instance, name, parms, basetype_path, + (LOOKUP_SPECULATIVELY|flags) + &~LOOKUP_COMPLAIN); + /* If it works, return it. */ + if (result && result != error_mark_node) + return build_method_call (instance, name, parms, basetype_path, flags); + /* If it doesn't work, two argument delete must work */ + TREE_CHAIN (parms) = save_last; + } + + if (TREE_CODE (name) == BIT_NOT_EXPR) + { + flags |= LOOKUP_DESTRUCTOR; + name = TREE_OPERAND (name, 0); + if (parms) + error ("destructors take no parameters"); + basetype = get_type_value (name); + if (basetype == NULL_TREE) + { + cp_error ("call to destructor for non-type `%D'", name); + return void_zero_node; + } + if (! TYPE_HAS_DESTRUCTOR (basetype)) + return void_zero_node; + instance = default_conversion (instance); + instance_ptr = build_unary_op (ADDR_EXPR, instance, 0); + return build_delete (build_pointer_type (basetype), + instance_ptr, integer_two_node, + LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0); + } + + { + char *xref_name; + + /* Initialize name for error reporting. */ + if (IDENTIFIER_OPNAME_P (name) && ! IDENTIFIER_TYPENAME_P (name)) + { + char *p = operator_name_string (name); + xref_name = (char *)alloca (strlen (p) + 10); + sprintf (xref_name, "operator %s", p); + } + else if (TREE_CODE (name) == SCOPE_REF) + xref_name = IDENTIFIER_POINTER (TREE_OPERAND (name, 1)); + else + xref_name = IDENTIFIER_POINTER (name); + + GNU_xref_call (current_function_decl, xref_name); + } + + if (instance == NULL_TREE) + { + basetype = NULL_TREE; + /* Check cases where this is really a call to raise + an exception. */ + if (current_class_type && TREE_CODE (name) == IDENTIFIER_NODE) + { + basetype = purpose_member (name, CLASSTYPE_TAGS (current_class_type)); + if (basetype) + basetype = TREE_VALUE (basetype); + } + else if (TREE_CODE (name) == SCOPE_REF + && TREE_CODE (TREE_OPERAND (name, 0)) == IDENTIFIER_NODE) + { + if (! is_aggr_typedef (TREE_OPERAND (name, 0), 1)) + return error_mark_node; + basetype = purpose_member (TREE_OPERAND (name, 1), + CLASSTYPE_TAGS (IDENTIFIER_TYPE_VALUE (TREE_OPERAND (name, 0)))); + if (basetype) + basetype = TREE_VALUE (basetype); + } + + if (basetype != NULL_TREE) + ; + /* call to a constructor... */ + else if (IDENTIFIER_HAS_TYPE_VALUE (name)) + { + basetype = IDENTIFIER_TYPE_VALUE (name); + name = constructor_name_full (basetype); + } + else + { + tree typedef_name = lookup_name (name, 1); + if (typedef_name && TREE_CODE (typedef_name) == TYPE_DECL) + { + /* Canonicalize the typedef name. */ + basetype = TREE_TYPE (typedef_name); + name = TYPE_IDENTIFIER (basetype); + } + else + { + cp_error ("no constructor named `%T' in scope", + name); + return error_mark_node; + } + } + + if (! IS_AGGR_TYPE (basetype)) + { + non_aggr_error: + if ((flags & LOOKUP_COMPLAIN) && TREE_CODE (basetype) != ERROR_MARK) + cp_error ("request for member `%D' in `%E', which is of non-aggregate type `%T'", + name, instance, basetype); + + return error_mark_node; + } + } + else if (instance == C_C_D || instance == current_class_decl) + { + /* When doing initialization, we side-effect the TREE_TYPE of + C_C_D, hence we cannot set up BASETYPE from CURRENT_CLASS_TYPE. */ + basetype = TREE_TYPE (C_C_D); + + /* Anything manifestly `this' in constructors and destructors + has a known type, so virtual function tables are not needed. */ + if (TYPE_VIRTUAL_P (basetype) + && !(flags & LOOKUP_NONVIRTUAL)) + need_vtbl = (dtor_label || ctor_label) + ? unneeded : maybe_needed; + + instance = C_C_D; + instance_ptr = current_class_decl; + result = build_field_call (TYPE_BINFO (current_class_type), + instance_ptr, name, parms); + + if (result) + return result; + } + else if (TREE_CODE (instance) == RESULT_DECL) + { + basetype = TREE_TYPE (instance); + /* Should we ever have to make a virtual function reference + from a RESULT_DECL, know that it must be of fixed type + within the scope of this function. */ + if (!(flags & LOOKUP_NONVIRTUAL) && TYPE_VIRTUAL_P (basetype)) + need_vtbl = maybe_needed; + instance_ptr = build1 (ADDR_EXPR, TYPE_POINTER_TO (basetype), instance); + } + else if (instance == current_exception_object) + { + instance_ptr = build1 (ADDR_EXPR, TYPE_POINTER_TO (current_exception_type), + TREE_OPERAND (current_exception_object, 0)); + mark_addressable (TREE_OPERAND (current_exception_object, 0)); + result = build_field_call (TYPE_BINFO (current_exception_type), + instance_ptr, name, parms); + if (result) + return result; + cp_error ("exception member `%D' cannot be invoked", name); + return error_mark_node; + } + else + { + /* The MAIN_VARIANT of the type that `instance_ptr' winds up being. */ + tree inst_ptr_basetype; + + static_call_context = + (TREE_CODE (instance) == INDIRECT_REF + && TREE_CODE (TREE_OPERAND (instance, 0)) == NOP_EXPR + && TREE_OPERAND (TREE_OPERAND (instance, 0), 0) == error_mark_node); + + /* the base type of an instance variable is pointer to class */ + basetype = TREE_TYPE (instance); + + if (TREE_CODE (basetype) == REFERENCE_TYPE) + { + basetype = TYPE_MAIN_VARIANT (TREE_TYPE (basetype)); + if (! IS_AGGR_TYPE (basetype)) + goto non_aggr_error; + /* Call to convert not needed because we are remaining + within the same type. */ + instance_ptr = build1 (NOP_EXPR, TYPE_POINTER_TO (basetype), instance); + inst_ptr_basetype = basetype; + } + else + { + if (! IS_AGGR_TYPE (basetype)) + goto non_aggr_error; + + if (IS_SIGNATURE_POINTER (basetype) + || IS_SIGNATURE_REFERENCE (basetype)) + basetype = SIGNATURE_TYPE (basetype); + + if ((IS_SIGNATURE (basetype) + && (instance_ptr = build_optr_ref (instance))) + || (lvalue_p (instance) + && (instance_ptr = build_unary_op (ADDR_EXPR, instance, 0))) + || (instance_ptr = unary_complex_lvalue (ADDR_EXPR, instance))) + { + if (instance_ptr == error_mark_node) + return error_mark_node; + } + else if (TREE_CODE (instance) == NOP_EXPR + || TREE_CODE (instance) == CONSTRUCTOR) + { + /* A cast is not an lvalue. Initialize a fresh temp + with the value we are casting from, and proceed with + that temporary. We can't cast to a reference type, + so that simplifies the initialization to something + we can manage. */ + tree temp = get_temp_name (TREE_TYPE (instance), 0); + if (IS_AGGR_TYPE (TREE_TYPE (instance))) + expand_aggr_init (temp, instance, 0); + else + { + store_init_value (temp, instance); + expand_decl_init (temp); + } + instance = temp; + instance_ptr = build_unary_op (ADDR_EXPR, instance, 0); + } + else + { + if (TREE_CODE (instance) != CALL_EXPR) + my_friendly_abort (125); + if (TYPE_NEEDS_CONSTRUCTING (basetype)) + instance = build_cplus_new (basetype, instance, 0); + else + { + instance = get_temp_name (basetype, 0); + TREE_ADDRESSABLE (instance) = 1; + } + instance_ptr = build_unary_op (ADDR_EXPR, instance, 0); + } + /* @@ Should we call comp_target_types here? */ + inst_ptr_basetype = TREE_TYPE (TREE_TYPE (instance_ptr)); + if (TYPE_MAIN_VARIANT (basetype) == TYPE_MAIN_VARIANT (inst_ptr_basetype)) + basetype = inst_ptr_basetype; + else + { + instance_ptr = convert (TYPE_POINTER_TO (basetype), instance_ptr); + if (instance_ptr == error_mark_node) + return error_mark_node; + } + } + + /* After converting `instance_ptr' above, `inst_ptr_basetype' was + not updated, so we use `basetype' instead. */ + if (basetype_path == NULL_TREE + && IS_SIGNATURE (basetype)) + basetype_path = TYPE_BINFO (basetype); + else if (basetype_path == NULL_TREE || + BINFO_TYPE (basetype_path) != TYPE_MAIN_VARIANT (inst_ptr_basetype)) + basetype_path = TYPE_BINFO (inst_ptr_basetype); + + result = build_field_call (basetype_path, instance_ptr, name, parms); + if (result) + return result; + + if (!(flags & LOOKUP_NONVIRTUAL) && TYPE_VIRTUAL_P (basetype)) + { + if (TREE_SIDE_EFFECTS (instance_ptr)) + { + /* This action is needed because the instance is needed + for providing the base of the virtual function table. + Without using a SAVE_EXPR, the function we are building + may be called twice, or side effects on the instance + variable (such as a post-increment), may happen twice. */ + instance_ptr = save_expr (instance_ptr); + instance = build_indirect_ref (instance_ptr, NULL_PTR); + } + else if (TREE_CODE (TREE_TYPE (instance)) == POINTER_TYPE) + { + /* This happens when called for operator new (). */ + instance = build_indirect_ref (instance, NULL_PTR); + } + + need_vtbl = maybe_needed; + } + } + + if (TYPE_SIZE (basetype) == 0) + { + /* This is worth complaining about, I think. */ + cp_error ("cannot lookup method in incomplete type `%T'", basetype); + return error_mark_node; + } + + save_basetype = basetype; + +#if 0 + if (all_virtual == 1 + && (! strncmp (IDENTIFIER_POINTER (name), OPERATOR_METHOD_FORMAT, + OPERATOR_METHOD_LENGTH) + || instance_ptr == NULL_TREE + || (TYPE_OVERLOADS_METHOD_CALL_EXPR (basetype) == 0))) + all_virtual = 0; +#endif + + last = NULL_TREE; + for (parmtypes = NULL_TREE, parm = parms; parm; parm = TREE_CHAIN (parm)) + { + tree t = TREE_TYPE (TREE_VALUE (parm)); + if (TREE_CODE (t) == OFFSET_TYPE) + { + /* Convert OFFSET_TYPE entities to their normal selves. */ + TREE_VALUE (parm) = resolve_offset_ref (TREE_VALUE (parm)); + t = TREE_TYPE (TREE_VALUE (parm)); + } + if (TREE_CODE (t) == ARRAY_TYPE) + { + /* Perform the conversion from ARRAY_TYPE to POINTER_TYPE in place. + This eliminates needless calls to `compute_conversion_costs'. */ + TREE_VALUE (parm) = default_conversion (TREE_VALUE (parm)); + t = TREE_TYPE (TREE_VALUE (parm)); + } + if (t == error_mark_node) + return error_mark_node; + last = build_tree_list (NULL_TREE, t); + parmtypes = chainon (parmtypes, last); + } + + if (instance) + { + constp = TREE_READONLY (instance); + volatilep = TREE_THIS_VOLATILE (instance); + parms = tree_cons (NULL_TREE, instance_ptr, parms); + } + else + { + /* Raw constructors are always in charge. */ + if (TYPE_USES_VIRTUAL_BASECLASSES (basetype) + && ! (flags & LOOKUP_HAS_IN_CHARGE)) + { + flags |= LOOKUP_HAS_IN_CHARGE; + parms = tree_cons (NULL_TREE, integer_one_node, parms); + parmtypes = tree_cons (NULL_TREE, integer_type_node, parmtypes); + } + + if (flag_this_is_variable > 0) + { + constp = 0; + volatilep = 0; + parms = tree_cons (NULL_TREE, build1 (NOP_EXPR, TYPE_POINTER_TO (basetype), integer_zero_node), parms); + } + else + { + constp = 0; + volatilep = 0; + instance_ptr = build_new (NULL_TREE, basetype, void_type_node, 0); + if (instance_ptr == error_mark_node) + return error_mark_node; + instance_ptr = save_expr (instance_ptr); + TREE_CALLS_NEW (instance_ptr) = 1; + instance = build_indirect_ref (instance_ptr, NULL_PTR); + + /* If it's a default argument initialized from a ctor, what we get + from instance_ptr will match the arglist for the FUNCTION_DECL + of the constructor. */ + if (parms && TREE_CODE (TREE_VALUE (parms)) == CALL_EXPR + && TREE_OPERAND (TREE_VALUE (parms), 1) + && TREE_CALLS_NEW (TREE_VALUE (TREE_OPERAND (TREE_VALUE (parms), 1)))) + parms = build_tree_list (NULL_TREE, instance_ptr); + else + parms = tree_cons (NULL_TREE, instance_ptr, parms); + } + } + parmtypes = tree_cons (NULL_TREE, + build_pointer_type (build_type_variant (basetype, constp, volatilep)), + parmtypes); + if (last == NULL_TREE) + last = parmtypes; + + /* Look up function name in the structure type definition. */ + + if ((IDENTIFIER_HAS_TYPE_VALUE (name) + && IS_AGGR_TYPE (IDENTIFIER_TYPE_VALUE (name)) + && TREE_CODE(IDENTIFIER_TYPE_VALUE (name)) != UNINSTANTIATED_P_TYPE) + || name == constructor_name (basetype)) + { + tree tmp = NULL_TREE; + if (IDENTIFIER_TYPE_VALUE (name) == basetype + || name == constructor_name (basetype)) + tmp = TYPE_BINFO (basetype); + else + tmp = get_binfo (IDENTIFIER_TYPE_VALUE (name), basetype, 0); + + if (tmp != NULL_TREE) + { + name_kind = "constructor"; + + if (TYPE_USES_VIRTUAL_BASECLASSES (basetype) + && ! (flags & LOOKUP_HAS_IN_CHARGE)) + { + /* Constructors called for initialization + only are never in charge. */ + tree tmplist; + + flags |= LOOKUP_HAS_IN_CHARGE; + tmplist = tree_cons (NULL_TREE, integer_zero_node, + TREE_CHAIN (parms)); + TREE_CHAIN (parms) = tmplist; + tmplist = tree_cons (NULL_TREE, integer_type_node, TREE_CHAIN (parmtypes)); + TREE_CHAIN (parmtypes) = tmplist; + } + basetype = BINFO_TYPE (tmp); + } + else + name_kind = "method"; + } + else + name_kind = "method"; + + if (basetype_path == NULL_TREE + || BINFO_TYPE (basetype_path) != TYPE_MAIN_VARIANT (basetype)) + basetype_path = TYPE_BINFO (basetype); + result = lookup_fnfields (basetype_path, name, + (flags & LOOKUP_COMPLAIN)); + if (result == error_mark_node) + return error_mark_node; + + + /* Now, go look for this method name. We do not find destructors here. + + Putting `void_list_node' on the end of the parmtypes + fakes out `build_decl_overload' into doing the right thing. */ + TREE_CHAIN (last) = void_list_node; + method_name = build_decl_overload (name, parmtypes, + 1 + (name == constructor_name (save_basetype) + || name == constructor_name_full (save_basetype))); + TREE_CHAIN (last) = NULL_TREE; + + for (pass = 0; pass < 2; pass++) + { + struct candidate *candidates; + struct candidate *cp; + int len; + unsigned best = 1; + + /* This increments every time we go up the type hierarchy. + The idea is to prefer a function of the derived class if possible. */ + int b_or_d = 0; + + baselink = result; + + if (pass > 0) + { + candidates + = (struct candidate *) alloca ((ever_seen+1) + * sizeof (struct candidate)); + bzero (candidates, (ever_seen + 1) * sizeof (struct candidate)); + cp = candidates; + len = list_length (parms); + ever_seen = 0; + + /* First see if a global function has a shot at it. */ + if (flags & LOOKUP_GLOBAL) + { + tree friend_parms; + tree parm = TREE_VALUE (parms); + + if (TREE_CODE (TREE_TYPE (parm)) == REFERENCE_TYPE) + friend_parms = parms; + else if (TREE_CODE (TREE_TYPE (parm)) == POINTER_TYPE) + { + tree new_type; + parm = build_indirect_ref (parm, "friendifying parms (compiler error)"); + new_type = build_reference_type (TREE_TYPE (parm)); + /* It is possible that this should go down a layer. */ + new_type = build_type_variant (new_type, + TREE_READONLY (parm), + TREE_THIS_VOLATILE (parm)); + parm = convert (new_type, parm); + friend_parms = tree_cons (NULL_TREE, parm, TREE_CHAIN (parms)); + } + else + my_friendly_abort (167); + + cp->h_len = len; + if (flag_ansi_overloading) + cp->v.ansi_harshness = (struct harshness_code *) + alloca ((len + 1) * sizeof (struct harshness_code)); + else + cp->v.old_harshness = (unsigned short *) + alloca ((len + 1) * sizeof (unsigned short)); + + result = build_overload_call (name, friend_parms, 0, cp); + /* If it turns out to be the one we were actually looking for + (it was probably a friend function), the return the + good result. */ + if (TREE_CODE (result) == CALL_EXPR) + return result; + + if (flag_ansi_overloading) + while ((cp->h.code & EVIL_CODE) == 0) + { + /* non-standard uses: set the field to 0 to indicate + we are using a non-member function. */ + cp->u.field = 0; + if (cp->v.ansi_harshness[len].distance == 0 + && cp->h.code < best) + best = cp->h.code; + cp += 1; + } + else + while (cp->evil == 0) + { + /* non-standard uses: set the field to 0 to indicate + we are using a non-member function. */ + cp->u.field = 0; + if (cp->v.old_harshness[len] == 0 + && cp->v.old_harshness[len] == 0 + && cp->ellipsis == 0 && cp->user == 0 && cp->b_or_d == 0 + && cp->easy < best) + best = cp->easy; + cp += 1; + } + } + } + + while (baselink) + { + /* We have a hit (of sorts). If the parameter list is + "error_mark_node", or some variant thereof, it won't + match any methods. Since we have verified that the is + some method vaguely matching this one (in name at least), + silently return. + + Don't stop for friends, however. */ + basetype_path = TREE_PURPOSE (baselink); + + function = TREE_VALUE (baselink); + if (TREE_CODE (basetype_path) == TREE_LIST) + basetype_path = TREE_VALUE (basetype_path); + basetype = BINFO_TYPE (basetype_path); + + /* Cast the instance variable to the appropriate type. */ + TREE_VALUE (parms) = convert_force (TYPE_POINTER_TO (basetype), + instance_ptr); + /* FIXME: this is the wrong place to get an error. Hopefully + the access-control rewrite will make this change more cleanly. */ + if (TREE_VALUE (parms) == error_mark_node) + return error_mark_node; + + if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (function))) + function = DECL_CHAIN (function); + + for (; function; function = DECL_CHAIN (function)) + { +#ifdef GATHER_STATISTICS + n_inner_fields_searched++; +#endif + ever_seen++; + if (pass > 0) + found_fns = tree_cons (NULL_TREE, function, found_fns); + + /* Not looking for friends here. */ + if (TREE_CODE (TREE_TYPE (function)) == FUNCTION_TYPE + && ! DECL_STATIC_FUNCTION_P (function)) + continue; + + if (pass == 0 + && DECL_ASSEMBLER_NAME (function) == method_name) + goto found; + + if (pass > 0) + { + tree these_parms = parms; + +#ifdef GATHER_STATISTICS + n_inner_fields_searched++; +#endif + cp->h_len = len; + if (flag_ansi_overloading) + cp->v.ansi_harshness = (struct harshness_code *) + alloca ((len + 1) * sizeof (struct harshness_code)); + else + cp->v.old_harshness = (unsigned short *) + alloca ((len + 1) * sizeof (unsigned short)); + + if (DECL_STATIC_FUNCTION_P (function)) + these_parms = TREE_CHAIN (these_parms); + compute_conversion_costs (function, these_parms, cp, len); + + if (!flag_ansi_overloading) + cp->b_or_d += b_or_d; + + if ((flag_ansi_overloading && (cp->h.code & EVIL_CODE) == 0) + || (!flag_ansi_overloading && cp->evil == 0)) + { + cp->u.field = function; + cp->function = function; + cp->basetypes = basetype_path; + + /* No "two-level" conversions. */ + if (flags & LOOKUP_NO_CONVERSION + && ((flag_ansi_overloading + && (cp->h.code & USER_CODE)) + || (!flag_ansi_overloading + && cp->user != 0))) + continue; + + /* If we used default parameters, we must + check to see whether anyone else might + use them also, and report a possible + ambiguity. */ + if (! TYPE_USES_MULTIPLE_INHERITANCE (save_basetype) + && ((flag_ansi_overloading + && cp->v.ansi_harshness[len].distance == 0 + && cp->h.code < best) + || (!flag_ansi_overloading + && cp->v.old_harshness[len] == 0 + && CONST_HARSHNESS (cp->v.old_harshness[0]) == 0 + && cp->ellipsis == 0 && cp->user == 0 && cp->b_or_d == 0 + && cp->easy < best))) + { + if (! DECL_STATIC_FUNCTION_P (function)) + TREE_VALUE (parms) = cp->arg; + if (best == 1) + goto found_and_maybe_warn; + } + cp++; + } + } + } + /* Now we have run through one link's member functions. + arrange to head-insert this link's links. */ + baselink = next_baselink (baselink); + b_or_d += 1; + /* Don't grab functions from base classes. lookup_fnfield will + do the work to get us down into the right place. */ + baselink = NULL_TREE; + } + if (pass == 0) + { + tree igv = IDENTIFIER_GLOBAL_VALUE (name); + + /* No exact match could be found. Now try to find match + using default conversions. */ + if ((flags & LOOKUP_GLOBAL) && igv) + { + if (TREE_CODE (igv) == FUNCTION_DECL) + ever_seen += 1; + else if (TREE_CODE (igv) == TREE_LIST) + ever_seen += count_functions (igv); + } + + if (ever_seen == 0) + { + if ((flags & (LOOKUP_SPECULATIVELY|LOOKUP_COMPLAIN)) + == LOOKUP_SPECULATIVELY) + return NULL_TREE; + + TREE_CHAIN (last) = void_list_node; + if (flags & LOOKUP_GLOBAL) + cp_error ("no global or member function `%D(%A)' defined", + name, parmtypes); + else + cp_error ("no member function `%T::%D(%A)' defined", + save_basetype, name, TREE_CHAIN (parmtypes)); + return error_mark_node; + } + continue; + } + + if (cp - candidates != 0) + { + /* Rank from worst to best. Then cp will point to best one. + Private fields have their bits flipped. For unsigned + numbers, this should make them look very large. + If the best alternate has a (signed) negative value, + then all we ever saw were private members. */ + if (cp - candidates > 1) + { + cp = ideal_candidate (save_basetype, candidates, + cp - candidates, parms, len); + if (cp == (struct candidate *)0) + { + cp_error ("ambiguous type conversion requested for %s `%D'", + name_kind, name); + return error_mark_node; + } + if ((flag_ansi_overloading && (cp->h.code & EVIL_CODE)) + || (!flag_ansi_overloading && cp->evil)) + return error_mark_node; + } + else if ((flag_ansi_overloading && (cp[-1].h.code & EVIL_CODE)) + || (!flag_ansi_overloading && cp[-1].evil == 2)) + { + cp_error ("ambiguous type conversion requested for %s `%D'", + name_kind, name); + return error_mark_node; + } + else + cp--; + + /* The global function was the best, so use it. */ + if (cp->u.field == 0) + { + /* We must convert the instance pointer into a reference type. + Global overloaded functions can only either take + aggregate objects (which come for free from references) + or reference data types anyway. */ + TREE_VALUE (parms) = copy_node (instance_ptr); + TREE_TYPE (TREE_VALUE (parms)) = build_reference_type (TREE_TYPE (TREE_TYPE (instance_ptr))); + return build_function_call (cp->function, parms); + } + + function = cp->function; + basetype_path = cp->basetypes; + if (! DECL_STATIC_FUNCTION_P (function)) + TREE_VALUE (parms) = cp->arg; + goto found_and_maybe_warn; + } + + if ((flags & ~LOOKUP_GLOBAL) & (LOOKUP_COMPLAIN|LOOKUP_SPECULATIVELY)) + { + if ((flags & (LOOKUP_SPECULATIVELY|LOOKUP_COMPLAIN)) + == LOOKUP_SPECULATIVELY) + return NULL_TREE; + + if (DECL_STATIC_FUNCTION_P (cp->function)) + parms = TREE_CHAIN (parms); + if (ever_seen) + { + if (flags & LOOKUP_SPECULATIVELY) + return NULL_TREE; + if (static_call_context + && TREE_CODE (TREE_TYPE (cp->function)) == METHOD_TYPE) + cp_error ("object missing in call to `%D'", cp->function); + else if (ever_seen > 1) + { + TREE_CHAIN (last) = void_list_node; + cp_error ("no matching function for call to `%T::%D (%A)'", + TREE_TYPE (TREE_TYPE (instance_ptr)), + name, TREE_CHAIN (parmtypes)); + TREE_CHAIN (last) = NULL_TREE; + print_candidates (found_fns); + } + else + report_type_mismatch (cp, parms, name_kind); + return error_mark_node; + } + + if ((flags & (LOOKUP_SPECULATIVELY|LOOKUP_COMPLAIN)) + == LOOKUP_COMPLAIN) + { + cp_error ("%T has no method named %D", save_basetype, name); + return error_mark_node; + } + return NULL_TREE; + } + continue; + + found_and_maybe_warn: + if ((flag_ansi_overloading + && (cp->v.ansi_harshness[0].code & CONST_CODE)) + || (!flag_ansi_overloading + && CONST_HARSHNESS (cp->v.old_harshness[0]))) + { + if (flags & LOOKUP_COMPLAIN) + { + cp_error_at ("non-const member function `%D'", cp->function); + error ("called for const object at this point in file"); + } + /* Not good enough for a match. */ + else + return error_mark_node; + } + goto found; + } + /* Silently return error_mark_node. */ + return error_mark_node; + + found: + if (flags & LOOKUP_PROTECT) + access = compute_access (basetype_path, function); + + if (access == access_private) + { + if (flags & LOOKUP_COMPLAIN) + { + cp_error_at ("%s `%+#D' is %s", name_kind, function, + TREE_PRIVATE (function) ? "private" + : "from private base class"); + error ("within this context"); + } + return error_mark_node; + } + else if (access == access_protected) + { + if (flags & LOOKUP_COMPLAIN) + { + cp_error_at ("%s `%+#D' %s", name_kind, function, + TREE_PROTECTED (function) ? "is protected" + : "has protected accessibility"); + error ("within this context"); + } + return error_mark_node; + } + + /* From here on down, BASETYPE is the type that INSTANCE_PTR's + type (if it exists) is a pointer to. */ + + if (IS_SIGNATURE (basetype) && static_call_context) + { + cp_error ("cannot call signature member function `%T::%D' without signature pointer/reference", + basetype, name); + return error_mark_node; + } + else if (IS_SIGNATURE (basetype)) + return build_signature_method_call (basetype, instance, function, parms); + + function = DECL_MAIN_VARIANT (function); + /* Declare external function if necessary. */ + assemble_external (function); + + fntype = TREE_TYPE (function); + if (TREE_CODE (fntype) == POINTER_TYPE) + fntype = TREE_TYPE (fntype); + basetype = DECL_CLASS_CONTEXT (function); + + /* If we are referencing a virtual function from an object + of effectively static type, then there is no need + to go through the virtual function table. */ + if (need_vtbl == maybe_needed) + { + int fixed_type = resolves_to_fixed_type_p (instance, 0); + + if (all_virtual == 1 + && DECL_VINDEX (function) + && may_be_remote (basetype)) + need_vtbl = needed; + else if (DECL_VINDEX (function)) + need_vtbl = fixed_type ? unneeded : needed; + else + need_vtbl = not_needed; + } + + if (TREE_CODE (fntype) == METHOD_TYPE && static_call_context + && !DECL_CONSTRUCTOR_P (function)) + { + /* Let's be nice to the user for now, and give reasonable + default behavior. */ + instance_ptr = current_class_decl; + if (instance_ptr) + { + if (basetype != current_class_type) + { + tree binfo = get_binfo (basetype, current_class_type, 1); + if (binfo == NULL_TREE) + { + error_not_base_type (function, current_class_type); + return error_mark_node; + } + else if (basetype == error_mark_node) + return error_mark_node; + } + } + /* Only allow a static member function to call another static member + function. */ + else if (DECL_LANG_SPECIFIC (function) + && !DECL_STATIC_FUNCTION_P (function)) + { + cp_error ("cannot call member function `%D' without object", + function); + return error_mark_node; + } + } + + value_type = TREE_TYPE (fntype) ? TREE_TYPE (fntype) : void_type_node; + + if (TYPE_SIZE (value_type) == 0) + { + if (flags & LOOKUP_COMPLAIN) + incomplete_type_error (0, value_type); + return error_mark_node; + } + + /* We do not pass FUNCTION into `convert_arguments', because by + now everything should be ok. If not, then we have a serious error. */ + if (DECL_STATIC_FUNCTION_P (function)) + parms = convert_arguments (NULL_TREE, TYPE_ARG_TYPES (fntype), + TREE_CHAIN (parms), NULL_TREE, LOOKUP_NORMAL); + else if (need_vtbl == unneeded) + { + int sub_flags = DECL_CONSTRUCTOR_P (function) ? flags : LOOKUP_NORMAL; + basetype = TREE_TYPE (instance); + if (TYPE_METHOD_BASETYPE (TREE_TYPE (function)) != TYPE_MAIN_VARIANT (basetype) + && TYPE_USES_COMPLEX_INHERITANCE (basetype)) + { + basetype = DECL_CLASS_CONTEXT (function); + instance_ptr = convert_pointer_to (basetype, instance_ptr); + instance = build_indirect_ref (instance_ptr, NULL_PTR); + } + parms = tree_cons (NULL_TREE, instance_ptr, + convert_arguments (NULL_TREE, TREE_CHAIN (TYPE_ARG_TYPES (fntype)), TREE_CHAIN (parms), NULL_TREE, sub_flags)); + } + else + { + if ((flags & LOOKUP_NONVIRTUAL) == 0) + basetype = DECL_CONTEXT (function); + + /* First parm could be integer_zerop with casts like + ((Object*)0)->Object::IsA() */ + if (!integer_zerop (TREE_VALUE (parms))) + { + /* Since we can't have inheritance with a union, doing get_binfo + on it won't work. We do all the convert_pointer_to_real + stuff to handle MI correctly...for unions, that's not + an issue, so we must short-circuit that extra work here. */ + tree tmp = TREE_TYPE (TREE_TYPE (TREE_VALUE (parms))); + if (tmp != NULL_TREE && TREE_CODE (tmp) == UNION_TYPE) + instance_ptr = TREE_VALUE (parms); + else + { + tree binfo = get_binfo (basetype, + TREE_TYPE (TREE_TYPE (TREE_VALUE (parms))), + 0); + instance_ptr = convert_pointer_to_real (binfo, TREE_VALUE (parms)); + } + instance_ptr + = convert_pointer_to (build_type_variant (basetype, + constp, volatilep), + instance_ptr); + + if (TREE_CODE (instance_ptr) == COND_EXPR) + { + instance_ptr = save_expr (instance_ptr); + instance = build_indirect_ref (instance_ptr, NULL_PTR); + } + else if (TREE_CODE (instance_ptr) == NOP_EXPR + && TREE_CODE (TREE_OPERAND (instance_ptr, 0)) == ADDR_EXPR + && TREE_OPERAND (TREE_OPERAND (instance_ptr, 0), 0) == instance) + ; + /* The call to `convert_pointer_to' may return error_mark_node. */ + else if (TREE_CODE (instance_ptr) == ERROR_MARK) + return instance_ptr; + else if (instance == NULL_TREE + || TREE_CODE (instance) != INDIRECT_REF + || TREE_OPERAND (instance, 0) != instance_ptr) + instance = build_indirect_ref (instance_ptr, NULL_PTR); + } + parms = tree_cons (NULL_TREE, instance_ptr, + convert_arguments (NULL_TREE, TREE_CHAIN (TYPE_ARG_TYPES (fntype)), TREE_CHAIN (parms), NULL_TREE, LOOKUP_NORMAL)); + } + +#if 0 + /* Constructors do not overload method calls. */ + else if (TYPE_OVERLOADS_METHOD_CALL_EXPR (basetype) + && name != TYPE_IDENTIFIER (basetype) + && (TREE_CODE (function) != FUNCTION_DECL + || strncmp (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (function)), + OPERATOR_METHOD_FORMAT, + OPERATOR_METHOD_LENGTH)) + && (may_be_remote (basetype) || instance != C_C_D)) + { + tree fn_as_int; + + parms = TREE_CHAIN (parms); + + if (!all_virtual && TREE_CODE (function) == FUNCTION_DECL) + fn_as_int = build_unary_op (ADDR_EXPR, function, 0); + else + fn_as_int = convert (TREE_TYPE (default_conversion (function)), DECL_VINDEX (function)); + if (all_virtual == 1) + fn_as_int = convert (integer_type_node, fn_as_int); + + result = build_opfncall (METHOD_CALL_EXPR, LOOKUP_NORMAL, instance, fn_as_int, parms); + + if (result == NULL_TREE) + { + compiler_error ("could not overload `operator->()(...)'"); + return error_mark_node; + } + else if (result == error_mark_node) + return error_mark_node; + +#if 0 + /* Do this if we want the result of operator->() to inherit + the type of the function it is subbing for. */ + TREE_TYPE (result) = value_type; +#endif + + return result; + } +#endif + + if (need_vtbl == needed) + { + function = build_vfn_ref (&TREE_VALUE (parms), instance, DECL_VINDEX (function)); + TREE_TYPE (function) = build_pointer_type (fntype); + } + + if (TREE_CODE (function) == FUNCTION_DECL) + GNU_xref_call (current_function_decl, + IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (function))); + + { + int is_constructor; + + if (TREE_CODE (function) == FUNCTION_DECL) + { + is_constructor = DECL_CONSTRUCTOR_P (function); + if (DECL_INLINE (function)) + function = build1 (ADDR_EXPR, build_pointer_type (fntype), function); + else + { + assemble_external (function); + TREE_USED (function) = 1; + function = default_conversion (function); + } + } + else + { + is_constructor = 0; + function = default_conversion (function); + } + + result = build_nt (CALL_EXPR, function, parms, NULL_TREE); + + TREE_TYPE (result) = value_type; + TREE_SIDE_EFFECTS (result) = 1; + TREE_RAISES (result) + = TYPE_RAISES_EXCEPTIONS (fntype) || (parms && TREE_RAISES (parms)); + TREE_HAS_CONSTRUCTOR (result) = is_constructor; + return result; + } +} + +/* Similar to `build_method_call', but for overloaded non-member functions. + The name of this function comes through NAME. The name depends + on PARMS. + + Note that this function must handle simple `C' promotions, + as well as variable numbers of arguments (...), and + default arguments to boot. + + If the overloading is successful, we return a tree node which + contains the call to the function. + + If overloading produces candidates which are probable, but not definite, + we hold these candidates. If FINAL_CP is non-zero, then we are free + to assume that final_cp points to enough storage for all candidates that + this function might generate. The `harshness' array is preallocated for + the first candidate, but not for subsequent ones. + + Note that the DECL_RTL of FUNCTION must be made to agree with this + function's new name. */ + +tree +build_overload_call_real (fnname, parms, flags, final_cp, buildxxx) + tree fnname, parms; + int flags; + struct candidate *final_cp; + int buildxxx; +{ + /* must check for overloading here */ + tree overload_name, functions, function, parm; + tree parmtypes = NULL_TREE, last = NULL_TREE; + register tree outer; + int length; + int parmlength = list_length (parms); + + struct candidate *candidates, *cp; + + if (final_cp) + { + if (flag_ansi_overloading) + { + final_cp[0].h.code = 0; + final_cp[0].h.distance = 0; + final_cp[0].function = 0; + /* end marker. */ + final_cp[1].h.code = EVIL_CODE; + } + else + { + final_cp[0].evil = 0; + final_cp[0].user = 0; + final_cp[0].b_or_d = 0; + final_cp[0].easy = 0; + final_cp[0].function = 0; + /* end marker. */ + final_cp[1].evil = 1; + } + } + + for (parm = parms; parm; parm = TREE_CHAIN (parm)) + { + register tree t = TREE_TYPE (TREE_VALUE (parm)); + + if (t == error_mark_node) + { + if (final_cp) + { + if (flag_ansi_overloading) + final_cp->h.code = EVIL_CODE; + else + final_cp->evil = 1; + } + return error_mark_node; + } + if (TREE_CODE (t) == ARRAY_TYPE || TREE_CODE (t) == OFFSET_TYPE) + { + /* Perform the conversion from ARRAY_TYPE to POINTER_TYPE in place. + Also convert OFFSET_TYPE entities to their normal selves. + This eliminates needless calls to `compute_conversion_costs'. */ + TREE_VALUE (parm) = default_conversion (TREE_VALUE (parm)); + t = TREE_TYPE (TREE_VALUE (parm)); + } + last = build_tree_list (NULL_TREE, t); + parmtypes = chainon (parmtypes, last); + } + if (last) + TREE_CHAIN (last) = void_list_node; + else + parmtypes = void_list_node; + + if (! flag_ansi_overloading) + { + /* This is a speed improvement that ends up not working properly in + the situation of fns with and without default parameters. I turned + this off in the new method so it'll go through the argument matching + code to properly diagnose a match/failure. (bpk) */ + overload_name = build_decl_overload (fnname, parmtypes, 0); + + /* Now check to see whether or not we can win. + Note that if we are called from `build_method_call', + then we cannot have a mis-match, because we would have + already found such a winning case. */ + + if (IDENTIFIER_GLOBAL_VALUE (overload_name)) + if (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (overload_name)) != TREE_LIST) + return build_function_call (DECL_MAIN_VARIANT (IDENTIFIER_GLOBAL_VALUE (overload_name)), parms); + } + + functions = IDENTIFIER_GLOBAL_VALUE (fnname); + + if (functions == NULL_TREE) + { + if (flags & LOOKUP_SPECULATIVELY) + return NULL_TREE; + if (flags & LOOKUP_COMPLAIN) + error ("only member functions apply"); + if (final_cp) + { + if (flag_ansi_overloading) + final_cp->h.code = EVIL_CODE; + else + final_cp->evil = 1; + } + return error_mark_node; + } + + if (! TREE_OVERLOADED (fnname)) + { + functions = DECL_MAIN_VARIANT (functions); + if (final_cp) + { + /* We are just curious whether this is a viable alternative or + not. */ + compute_conversion_costs (functions, parms, final_cp, parmlength); + return functions; + } + else + return build_function_call_real (functions, parms, 1, flags); + } + + if (TREE_CODE (functions) == TREE_LIST + && TREE_VALUE (functions) == NULL_TREE) + { + if (flags & LOOKUP_SPECULATIVELY) + return NULL_TREE; + + if (flags & LOOKUP_COMPLAIN) + cp_error ("function `%D' declared overloaded, but no instances of that function declared", + TREE_PURPOSE (functions)); + if (final_cp) + { + if (flag_ansi_overloading) + final_cp->h.code = EVIL_CODE; + else + final_cp->evil = 1; + } + return error_mark_node; + } + + length = count_functions (functions); + + if (final_cp) + candidates = final_cp; + else + { + candidates + = (struct candidate *)alloca ((length+1) * sizeof (struct candidate)); + bzero (candidates, (length + 1) * sizeof (struct candidate)); + } + + cp = candidates; + + my_friendly_assert (is_overloaded_fn (functions), 169); + + functions = get_first_fn (functions); + + /* OUTER is the list of FUNCTION_DECLS, in a TREE_LIST. */ + for (outer = functions; outer; outer = DECL_CHAIN (outer)) + { + int template_cost = 0; + function = outer; + if (TREE_CODE (function) != FUNCTION_DECL + && ! (TREE_CODE (function) == TEMPLATE_DECL + && ! DECL_TEMPLATE_IS_CLASS (function) + && TREE_CODE (DECL_TEMPLATE_RESULT (function)) == FUNCTION_DECL)) + { + enum tree_code code = TREE_CODE (function); + if (code == TEMPLATE_DECL) + code = TREE_CODE (DECL_TEMPLATE_RESULT (function)); + if (code == CONST_DECL) + cp_error_at + ("enumeral value `%D' conflicts with function of same name", + function); + else if (code == VAR_DECL) + { + if (TREE_STATIC (function)) + cp_error_at + ("variable `%D' conflicts with function of same name", + function); + else + cp_error_at + ("constant field `%D' conflicts with function of same name", + function); + } + else if (code == TYPE_DECL) + continue; + else + my_friendly_abort (2); + error ("at this point in file"); + continue; + } + if (TREE_CODE (function) == TEMPLATE_DECL) + { + int ntparms = TREE_VEC_LENGTH (DECL_TEMPLATE_PARMS (function)); + tree *targs = (tree *) alloca (sizeof (tree) * ntparms); + int i; + + i = type_unification (DECL_TEMPLATE_PARMS (function), targs, + TYPE_ARG_TYPES (TREE_TYPE (function)), + parms, &template_cost, 0); + if (i == 0) + { + struct candidate *cp2; + + function = instantiate_template (function, targs); + /* Now check that the template instantiated for this is not + the same as a function that's in the list due to some + previous instantiation. */ + cp2 = candidates; + while (cp2 != cp) + if (cp2->function == function) + break; + else + cp2 += 1; + if (cp2->function == function) + continue; + } + } + + if (TREE_CODE (function) == TEMPLATE_DECL) + { + /* Unconverted template -- failed match. */ + cp->function = function; + cp->u.bad_arg = -4; + if (flag_ansi_overloading) + cp->h.code = EVIL_CODE; + else + cp->evil = 1; + } + else + { + function = DECL_MAIN_VARIANT (function); + + /* Can't use alloca here, since result might be + passed to calling function. */ + cp->h_len = parmlength; + if (flag_ansi_overloading) + cp->v.ansi_harshness = (struct harshness_code *) + oballoc ((parmlength + 1) * sizeof (struct harshness_code)); + else + cp->v.old_harshness = (unsigned short *) + oballoc ((parmlength + 1) * sizeof (unsigned short)); + + compute_conversion_costs (function, parms, cp, parmlength); + + if (flag_ansi_overloading) + /* Make sure this is clear as well. */ + cp->h.int_penalty += template_cost; + else + /* Should really add another field... */ + cp->easy = cp->easy * 128 + template_cost; + + /* It seemed easier to have both if stmts in here, rather + than excluding the hell out of it with flag_ansi_overloading + everywhere. (bpk) */ + if (flag_ansi_overloading) + { + if ((cp[0].h.code & EVIL_CODE) == 0) + { + cp[1].h.code = EVIL_CODE; + + /* int_penalty is set by convert_harshness_ansi for cases + where we need to know about any penalties that would + otherwise make a TRIVIAL_CODE pass. */ + if (final_cp + && template_cost == 0 + && cp[0].h.code <= TRIVIAL_CODE + && cp[0].h.int_penalty == 0) + { + final_cp[0].h = cp[0].h; + return function; + } + cp++; + } + } + else + { + if (cp[0].evil == 0) + { + cp[1].evil = 1; + if (final_cp + && cp[0].user == 0 && cp[0].b_or_d == 0 + && template_cost == 0 + && cp[0].easy <= 1) + { + final_cp[0].easy = cp[0].easy; + return function; + } + cp++; + } + } + } + } + + if (cp - candidates) + { + tree rval = error_mark_node; + + /* Leave marker. */ + if (flag_ansi_overloading) + cp[0].h.code = EVIL_CODE; + else + cp[0].evil = 1; + if (cp - candidates > 1) + { + struct candidate *best_cp + = ideal_candidate (NULL_TREE, candidates, + cp - candidates, parms, parmlength); + if (best_cp == (struct candidate *)0) + { + if (flags & LOOKUP_COMPLAIN) + { + cp_error ("call of overloaded `%D' is ambiguous", fnname); + print_n_candidates (candidates, cp - candidates); + } + return error_mark_node; + } + else + rval = best_cp->function; + } + else + { + cp -= 1; + if ((flag_ansi_overloading && (cp->h.code & EVIL_CODE)) + || (!flag_ansi_overloading && cp->evil > 1)) + { + if (flags & LOOKUP_COMPLAIN) + error ("type conversion ambiguous"); + } + else + rval = cp->function; + } + + if (final_cp) + return rval; + + return buildxxx ? build_function_call_real (rval, parms, 0, flags) + : build_function_call_real (rval, parms, 1, flags); + } + + if (flags & LOOKUP_SPECULATIVELY) + return NULL_TREE; + + if (flags & LOOKUP_COMPLAIN) + report_type_mismatch (cp, parms, "function", + decl_as_string (cp->function, 1)); + + return error_mark_node; +} + +tree +build_overload_call (fnname, parms, flags, final_cp) + tree fnname, parms; + int flags; + struct candidate *final_cp; +{ + return build_overload_call_real (fnname, parms, flags, final_cp, 0); +} + +tree +build_overload_call_maybe (fnname, parms, flags, final_cp) + tree fnname, parms; + int flags; + struct candidate *final_cp; +{ + return build_overload_call_real (fnname, parms, flags, final_cp, 1); +} diff --git a/gcc/cp/class.c b/gcc/cp/class.c new file mode 100644 index 0000000..e640010 --- /dev/null +++ b/gcc/cp/class.c @@ -0,0 +1,5048 @@ +/* Functions related to building classes and their related objects. + Copyright (C) 1987, 1992, 1993, 1994 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* High-level class interface. */ + +#include "config.h" +#include "tree.h" +#include <stdio.h> +#include "cp-tree.h" +#include "flags.h" + +#include "obstack.h" +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +extern struct obstack permanent_obstack; + +/* This is how we tell when two virtual member functions are really the + same. */ +#define SAME_FN(FN1DECL, FN2DECL) (DECL_ASSEMBLER_NAME (FN1DECL) == DECL_ASSEMBLER_NAME (FN2DECL)) + +extern void set_class_shadows PROTO ((tree)); + +/* Way of stacking class types. */ +static tree *current_class_base, *current_class_stack; +static int current_class_stacksize; +int current_class_depth; + +struct class_level +{ + /* The previous class level. */ + struct class_level *level_chain; + + /* The class instance variable, as a PARM_DECL. */ + tree decl; + /* The class instance variable, as an object. */ + tree object; + /* The virtual function table pointer + for the class instance variable. */ + tree vtable_decl; + + /* Name of the current class. */ + tree name; + /* Type of the current class. */ + tree type; + + /* Flags for this class level. */ + int this_is_variable; + int memoized_lookups; + int save_memoized; + int unused; +}; + +tree current_class_decl, C_C_D; /* PARM_DECL: the class instance variable */ +tree current_vtable_decl; + +/* The following two can be derived from the previous one */ +tree current_class_name; /* IDENTIFIER_NODE: name of current class */ +tree current_class_type; /* _TYPE: the type of the current class */ +tree previous_class_type; /* _TYPE: the previous type that was a class */ +tree previous_class_values; /* TREE_LIST: copy of the class_shadowed list + when leaving an outermost class scope. */ +static tree get_vfield_name PROTO((tree)); +tree the_null_vtable_entry; + +/* Way of stacking language names. */ +tree *current_lang_base, *current_lang_stack; +static int current_lang_stacksize; + +/* Names of languages we recognize. */ +tree lang_name_c, lang_name_cplusplus; +tree current_lang_name; + +/* When layout out an aggregate type, the size of the + basetypes (virtual and non-virtual) is passed to layout_record + via this node. */ +static tree base_layout_decl; + +/* Variables shared between cp-class.c and cp-call.c. */ + +int n_vtables = 0; +int n_vtable_entries = 0; +int n_vtable_searches = 0; +int n_vtable_elems = 0; +int n_convert_harshness = 0; +int n_compute_conversion_costs = 0; +int n_build_method_call = 0; +int n_inner_fields_searched = 0; + +/* Virtual baseclass things. */ +tree +build_vbase_pointer (exp, type) + tree exp, type; +{ + char *name; + + name = (char *) alloca (TYPE_NAME_LENGTH (type) + sizeof (VBASE_NAME) + 1); + sprintf (name, VBASE_NAME_FORMAT, TYPE_NAME_STRING (type)); + return build_component_ref (exp, get_identifier (name), 0, 0); +} + +/* Is the type of the EXPR, the complete type of the object? + If we are going to be wrong, we must be conservative, and return 0. */ +int +complete_type_p (expr) + tree expr; +{ + tree type = TYPE_MAIN_VARIANT (TREE_TYPE (expr)); + while (1) + { + switch (TREE_CODE (expr)) + { + case SAVE_EXPR: + case INDIRECT_REF: + case ADDR_EXPR: + case NOP_EXPR: + case CONVERT_EXPR: + expr = TREE_OPERAND (expr, 0); + continue; + + case CALL_EXPR: + if (! TREE_HAS_CONSTRUCTOR (expr)) + break; + /* fall through... */ + case VAR_DECL: + case FIELD_DECL: + if (TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE + && IS_AGGR_TYPE (TREE_TYPE (TREE_TYPE (expr))) + && TYPE_MAIN_VARIANT (TREE_TYPE (expr)) == type) + return 1; + /* fall through... */ + case TARGET_EXPR: + case PARM_DECL: + if (IS_AGGR_TYPE (TREE_TYPE (expr)) + && TYPE_MAIN_VARIANT (TREE_TYPE (expr)) == type) + return 1; + /* fall through... */ + case PLUS_EXPR: + default: + break; + } + break; + } + return 0; +} + +/* Build multi-level access to EXPR using hierarchy path PATH. + CODE is PLUS_EXPR if we are going with the grain, + and MINUS_EXPR if we are not (in which case, we cannot traverse + virtual baseclass links). + + TYPE is the type we want this path to have on exit. + + ALIAS_THIS is non-zero if EXPR in an expression involving `this'. */ +tree +build_vbase_path (code, type, expr, path, alias_this) + enum tree_code code; + tree type, expr, path; + int alias_this; +{ + register int changed = 0; + tree last = NULL_TREE, last_virtual = NULL_TREE; + int nonnull = 0; + int fixed_type_p = resolves_to_fixed_type_p (expr, &nonnull); + tree null_expr = 0, nonnull_expr; + tree basetype; + tree offset = integer_zero_node; + + /* We need additional logic to convert back to the unconverted type + (the static type of the complete object), and then convert back + to the type we want. Until that is done, or until we can + recognize when that is, we cannot do the short cut logic. (mrs) */ + /* Do this, until we can undo any previous convertions. See net35.C + for a testcase. */ + fixed_type_p = complete_type_p (expr); + + if (!fixed_type_p && TREE_SIDE_EFFECTS (expr)) + expr = save_expr (expr); + nonnull_expr = expr; + + if (BINFO_INHERITANCE_CHAIN (path)) + { + tree reverse_path = NULL_TREE; + + while (path) + { + tree r = copy_node (path); + BINFO_INHERITANCE_CHAIN (r) = reverse_path; + reverse_path = r; + path = BINFO_INHERITANCE_CHAIN (path); + } + path = reverse_path; + } + + basetype = BINFO_TYPE (path); + + while (path) + { + if (TREE_VIA_VIRTUAL (path)) + { + last_virtual = BINFO_TYPE (path); + if (code == PLUS_EXPR) + { + changed = ! fixed_type_p; + + if (changed) + { + extern int flag_assume_nonnull_objects; + tree ind; + + /* We already check for ambiguous things in the caller, just + find a path. */ + if (last) + { + tree binfo = get_binfo (last, TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (nonnull_expr))), 0); + nonnull_expr = convert_pointer_to_real (binfo, nonnull_expr); + } + ind = build_indirect_ref (nonnull_expr, NULL_PTR); + nonnull_expr = build_vbase_pointer (ind, last_virtual); + if (nonnull == 0 && !flag_assume_nonnull_objects + && null_expr == NULL_TREE) + { + null_expr = build1 (NOP_EXPR, TYPE_POINTER_TO (last_virtual), integer_zero_node); + expr = build (COND_EXPR, TYPE_POINTER_TO (last_virtual), + build (EQ_EXPR, integer_type_node, expr, + integer_zero_node), + null_expr, nonnull_expr); + } + } + /* else we'll figure out the offset below. */ + + /* Happens in the case of parse errors. */ + if (nonnull_expr == error_mark_node) + return error_mark_node; + } + else + { + cp_error ("cannot cast up from virtual baseclass `%T'", + last_virtual); + return error_mark_node; + } + } + last = path; + path = BINFO_INHERITANCE_CHAIN (path); + } + /* LAST is now the last basetype assoc on the path. */ + + /* A pointer to a virtual base member of a non-null object + is non-null. Therefore, we only need to test for zeroness once. + Make EXPR the canonical expression to deal with here. */ + if (null_expr) + { + TREE_OPERAND (expr, 2) = nonnull_expr; + TREE_TYPE (TREE_OPERAND (expr, 1)) = TREE_TYPE (nonnull_expr); + } + else + expr = nonnull_expr; + + /* If we go through any virtual base pointers, make sure that + casts to BASETYPE from the last virtual base class use + the right value for BASETYPE. */ + if (changed) + { + tree intype = TREE_TYPE (TREE_TYPE (expr)); + if (TYPE_MAIN_VARIANT (intype) == BINFO_TYPE (last)) + basetype = intype; + else + { + tree binfo = get_binfo (last, TYPE_MAIN_VARIANT (intype), 0); + basetype = last; + offset = BINFO_OFFSET (binfo); + } + } + else + { + if (last_virtual) + { + offset = BINFO_OFFSET (binfo_member (last_virtual, + CLASSTYPE_VBASECLASSES (basetype))); + offset = size_binop (PLUS_EXPR, offset, BINFO_OFFSET (last)); + } + else + offset = BINFO_OFFSET (last); + } + + if (TREE_INT_CST_LOW (offset)) + { + /* For multiple inheritance: if `this' can be set by any + function, then it could be 0 on entry to any function. + Preserve such zeroness here. Otherwise, only in the + case of constructors need we worry, and in those cases, + it will be zero, or initialized to some legal value to + which we may add. */ + if (nonnull == 0 && (alias_this == 0 || flag_this_is_variable > 0)) + { + if (null_expr) + TREE_TYPE (null_expr) = type; + else + null_expr = build1 (NOP_EXPR, type, integer_zero_node); + if (TREE_SIDE_EFFECTS (expr)) + expr = save_expr (expr); + + return build (COND_EXPR, type, + build (EQ_EXPR, integer_type_node, expr, integer_zero_node), + null_expr, + build (code, type, expr, offset)); + } + else return build (code, type, expr, offset); + } + + /* Cannot change the TREE_TYPE of a NOP_EXPR here, since it may + be used multiple times in initialization of multiple inheritance. */ + if (null_expr) + { + TREE_TYPE (expr) = type; + return expr; + } + else + return build1 (NOP_EXPR, type, expr); +} + +/* Virtual function things. */ + +/* Virtual functions to be dealt with after laying out our + base classes. Usually this is used only when classes have virtual + baseclasses, but it can happen also when classes have non-virtual + baseclasses if the derived class overrides baseclass functions + at different offsets. */ +static tree pending_hard_virtuals; +static int doing_hard_virtuals; + +/* XXX This is set but never used. (bpk) */ +#if 0 +/* Temporary binfo list to memoize lookups of the left-most non-virtual + baseclass B in a lattice topped by T. B can appear multiple times + in the lattice. + TREE_PURPOSE is B's TYPE_MAIN_VARIANT. + TREE_VALUE is the path by which B is reached from T. + TREE_TYPE is B's real type. + + If TREE_TYPE is NULL_TREE, it means that B was reached via + a virtual baseclass. + N.B.: This list consists of nodes on the temporary obstack. */ +static tree leftmost_baseclasses; +#endif + +/* Build an entry in the virtual function table. + DELTA is the offset for the `this' pointer. + PFN is an ADDR_EXPR containing a pointer to the virtual function. + Note that the index (DELTA2) in the virtual function table + is always 0. */ +tree +build_vtable_entry (delta, pfn) + tree delta, pfn; +{ + extern int flag_huge_objects; + tree elems = tree_cons (NULL_TREE, delta, + tree_cons (NULL_TREE, integer_zero_node, + build_tree_list (NULL_TREE, pfn))); + tree entry = build (CONSTRUCTOR, vtable_entry_type, NULL_TREE, elems); + + /* DELTA is constructed by `size_int', which means it may be an + unsigned quantity on some platforms. Therefore, we cannot use + `int_fits_type_p', because when DELTA is really negative, + `force_fit_type' will make it look like a very large number. */ + + if ((TREE_INT_CST_LOW (TYPE_MAX_VALUE (delta_type_node)) + < TREE_INT_CST_LOW (delta)) + || (TREE_INT_CST_LOW (delta) + < TREE_INT_CST_LOW (TYPE_MIN_VALUE (delta_type_node)))) + if (flag_huge_objects) + sorry ("object size exceeds built-in limit for virtual function table implementation"); + else + sorry ("object size exceeds normal limit for virtual function table implementation, recompile all source and use -fhuge-objects"); + + TREE_CONSTANT (entry) = 1; + TREE_STATIC (entry) = 1; + TREE_READONLY (entry) = 1; + +#ifdef GATHER_STATISTICS + n_vtable_entries += 1; +#endif + + return entry; +} + +/* Given an object INSTANCE, return an expression which yields the + virtual function corresponding to INDEX. There are many special + cases for INSTANCE which we take care of here, mainly to avoid + creating extra tree nodes when we don't have to. */ +tree +build_vfn_ref (ptr_to_instptr, instance, idx) + tree *ptr_to_instptr, instance; + tree idx; +{ + extern int building_cleanup; + tree vtbl, aref; + tree basetype = TREE_TYPE (instance); + + if (TREE_CODE (basetype) == REFERENCE_TYPE) + basetype = TREE_TYPE (basetype); + + if (instance == C_C_D) + { + if (current_vtable_decl == NULL_TREE + || current_vtable_decl == error_mark_node + || !UNIQUELY_DERIVED_FROM_P (DECL_FCONTEXT (CLASSTYPE_VFIELD (current_class_type)), basetype)) + vtbl = build_indirect_ref (build_vfield_ref (instance, basetype), NULL_PTR); + else + vtbl = current_vtable_decl; + } + else + { + if (optimize) + { + /* Try to figure out what a reference refers to, and + access its virtual function table directly. */ + tree ref = NULL_TREE; + + if (TREE_CODE (instance) == INDIRECT_REF + && TREE_CODE (TREE_TYPE (TREE_OPERAND (instance, 0))) == REFERENCE_TYPE) + ref = TREE_OPERAND (instance, 0); + else if (TREE_CODE (TREE_TYPE (instance)) == REFERENCE_TYPE) + ref = instance; + + if (ref && TREE_CODE (ref) == VAR_DECL + && DECL_INITIAL (ref)) + { + tree init = DECL_INITIAL (ref); + + while (TREE_CODE (init) == NOP_EXPR + || TREE_CODE (init) == NON_LVALUE_EXPR) + init = TREE_OPERAND (init, 0); + if (TREE_CODE (init) == ADDR_EXPR) + { + init = TREE_OPERAND (init, 0); + if (IS_AGGR_TYPE (TREE_TYPE (init)) + && (TREE_CODE (init) == PARM_DECL + || TREE_CODE (init) == VAR_DECL)) + instance = init; + } + } + } + + if (IS_AGGR_TYPE (TREE_TYPE (instance)) + && !IS_SIGNATURE_POINTER (TREE_TYPE (instance)) + && !IS_SIGNATURE_REFERENCE (TREE_TYPE (instance)) + && (TREE_CODE (instance) == RESULT_DECL + || TREE_CODE (instance) == PARM_DECL + || TREE_CODE (instance) == VAR_DECL)) + vtbl = TYPE_BINFO_VTABLE (basetype); + else + vtbl = build_indirect_ref (build_vfield_ref (instance, basetype), + NULL_PTR); + } + assemble_external (vtbl); + aref = build_array_ref (vtbl, idx); + + /* Save the intermediate result in a SAVE_EXPR so we don't have to + compute each component of the virtual function pointer twice. */ + if (!building_cleanup && TREE_CODE (aref) == INDIRECT_REF) + TREE_OPERAND (aref, 0) = save_expr (TREE_OPERAND (aref, 0)); + + *ptr_to_instptr + = build (PLUS_EXPR, TREE_TYPE (*ptr_to_instptr), + *ptr_to_instptr, + convert (ptrdiff_type_node, + build_component_ref (aref, delta_identifier, 0, 0))); + return build_component_ref (aref, pfn_identifier, 0, 0); +} + +/* Set TREE_PUBLIC and/or TREE_EXTERN on the vtable DECL, + based on TYPE and other static flags. + + Note that anything public is tagged TREE_PUBLIC, whether + it's public in this file or in another one. */ + +static void +import_export_vtable (decl, type) + tree decl, type; +{ + if (write_virtuals >= 2) + { + if (CLASSTYPE_INTERFACE_KNOWN (type)) + { + TREE_PUBLIC (decl) = 1; + DECL_EXTERNAL (decl) = ! CLASSTYPE_VTABLE_NEEDS_WRITING (type); + } + } + else if (write_virtuals != 0) + { + TREE_PUBLIC (decl) = 1; + if (write_virtuals < 0) + DECL_EXTERNAL (decl) = 1; + } +} + +/* Return the name of the virtual function table (as an IDENTIFIER_NODE) + for the given TYPE. */ +static tree +get_vtable_name (type) + tree type; +{ + tree type_id = build_typename_overload (type); + char *buf = (char *)alloca (sizeof (VTABLE_NAME_FORMAT) + + IDENTIFIER_LENGTH (type_id) + 2); + char *ptr = IDENTIFIER_POINTER (type_id); + int i; + for (i = 0; ptr[i] == OPERATOR_TYPENAME_FORMAT[i]; i++) ; +#if 0 + /* We don't take off the numbers; prepare_fresh_vtable uses the + DECL_ASSEMBLER_NAME for the type, which includes the number + in `3foo'. If we were to pull them off here, we'd end up with + something like `_vt.foo.3bar', instead of a uniform definition. */ + while (ptr[i] >= '0' && ptr[i] <= '9') + i += 1; +#endif + sprintf (buf, VTABLE_NAME_FORMAT, ptr+i); + return get_identifier (buf); +} + +/* Build a virtual function for type TYPE. + If BINFO is non-NULL, build the vtable starting with the initial + approximation that it is the same as the one which is the head of + the association list. */ +static tree +build_vtable (binfo, type) + tree binfo, type; +{ + tree name = get_vtable_name (type); + tree virtuals, decl; + + if (binfo) + { + virtuals = copy_list (BINFO_VIRTUALS (binfo)); + decl = build_decl (VAR_DECL, name, TREE_TYPE (BINFO_VTABLE (binfo))); + } + else + { + virtuals = NULL_TREE; + decl = build_decl (VAR_DECL, name, void_type_node); + } + +#ifdef GATHER_STATISTICS + n_vtables += 1; + n_vtable_elems += list_length (virtuals); +#endif + + /* Set TREE_PUBLIC and TREE_EXTERN as appropriate. */ + import_export_vtable (decl, type); + + IDENTIFIER_GLOBAL_VALUE (name) = decl = pushdecl_top_level (decl); + /* Initialize the association list for this type, based + on our first approximation. */ + TYPE_BINFO_VTABLE (type) = decl; + TYPE_BINFO_VIRTUALS (type) = virtuals; + + TREE_STATIC (decl) = 1; +#ifndef WRITABLE_VTABLES + /* Make them READONLY by default. (mrs) */ + TREE_READONLY (decl) = 1; +#endif + /* At one time the vtable info was grabbed 2 words at a time. This + fails on sparc unless you have 8-byte alignment. (tiemann) */ + DECL_ALIGN (decl) = MAX (TYPE_ALIGN (double_type_node), + DECL_ALIGN (decl)); + + /* Why is this conditional? (mrs) */ + if (binfo && write_virtuals >= 0) + DECL_VIRTUAL_P (decl) = 1; +#if 0 + /* Remember which class this vtable is really for. */ + if (binfo) + DECL_VPARENT (decl) = BINFO_TYPE (binfo); + else + DECL_VPARENT (decl) = type; +#endif + DECL_CONTEXT (decl) = type; + + binfo = TYPE_BINFO (type); + SET_BINFO_VTABLE_PATH_MARKED (binfo); + SET_BINFO_NEW_VTABLE_MARKED (binfo); + return decl; +} + +/* Given a base type PARENT, and a derived type TYPE, build + a name which distinguishes exactly the PARENT member of TYPE's type. + + FORMAT is a string which controls how sprintf formats the name + we have generated. + + For example, given + + class A; class B; class C : A, B; + + it is possible to distinguish "A" from "C's A". And given + + class L; + class A : L; class B : L; class C : A, B; + + it is possible to distinguish "L" from "A's L", and also from + "C's L from A". + + Make sure to use the DECL_ASSEMBLER_NAME of the TYPE_NAME of the + type, as template have DECL_NAMEs like: X<int>, whereas the + DECL_ASSEMBLER_NAME is set to be something the assembler can handle. + */ +static tree +build_type_pathname (format, parent, type) + char *format; + tree parent, type; +{ + extern struct obstack temporary_obstack; + char *first, *base, *name; + int i; + tree id; + + parent = TYPE_MAIN_VARIANT (parent); + + /* Remember where to cut the obstack to. */ + first = obstack_base (&temporary_obstack); + + /* Put on TYPE+PARENT. */ + obstack_grow (&temporary_obstack, + TYPE_ASSEMBLER_NAME_STRING (type), + TYPE_ASSEMBLER_NAME_LENGTH (type)); +#ifdef JOINER + obstack_1grow (&temporary_obstack, JOINER); +#else + obstack_1grow (&temporary_obstack, '_'); +#endif + obstack_grow0 (&temporary_obstack, + TYPE_ASSEMBLER_NAME_STRING (parent), + TYPE_ASSEMBLER_NAME_LENGTH (parent)); + i = obstack_object_size (&temporary_obstack); + base = obstack_base (&temporary_obstack); + obstack_finish (&temporary_obstack); + + /* Put on FORMAT+TYPE+PARENT. */ + obstack_blank (&temporary_obstack, strlen (format) + i + 1); + name = obstack_base (&temporary_obstack); + sprintf (name, format, base); + id = get_identifier (name); + obstack_free (&temporary_obstack, first); + + return id; +} + +/* Give TYPE a new virtual function table which is initialized + with a skeleton-copy of its original initialization. The only + entry that changes is the `delta' entry, so we can really + share a lot of structure. + + FOR_TYPE is the derived type which caused this table to + be needed. + + BINFO is the type association which provided TYPE for FOR_TYPE. + + The way we update BASE_BINFO's vtable information is just to change the + association information in FOR_TYPE's association list. */ +static void +prepare_fresh_vtable (binfo, base_binfo, for_type) + tree binfo, base_binfo, for_type; +{ + tree basetype = BINFO_TYPE (binfo); + tree orig_decl = BINFO_VTABLE (binfo); + tree name = build_type_pathname (VTABLE_NAME_FORMAT, basetype, for_type); + tree new_decl = build_decl (VAR_DECL, name, TREE_TYPE (orig_decl)); + tree path; + int result; + + /* Remember which class this vtable is really for. */ +#if 0 + DECL_VPARENT (new_decl) = BINFO_TYPE (base_binfo); +#endif + DECL_CONTEXT (new_decl) = for_type; + + TREE_STATIC (new_decl) = 1; + BINFO_VTABLE (binfo) = pushdecl_top_level (new_decl); + DECL_VIRTUAL_P (new_decl) = 1; +#ifndef WRITABLE_VTABLES + /* Make them READONLY by default. (mrs) */ + TREE_READONLY (new_decl) = 1; +#endif + DECL_ALIGN (new_decl) = DECL_ALIGN (orig_decl); + + /* Make fresh virtual list, so we can smash it later. */ + BINFO_VIRTUALS (binfo) = copy_list (BINFO_VIRTUALS (binfo)); + /* Install the value for `headof' if that's what we're doing. */ + if (flag_dossier) + TREE_VALUE (TREE_CHAIN (BINFO_VIRTUALS (binfo))) + = build_vtable_entry (size_binop (MINUS_EXPR, integer_zero_node, BINFO_OFFSET (binfo)), + FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (TREE_CHAIN (BINFO_VIRTUALS (binfo))))); + +#ifdef GATHER_STATISTICS + n_vtables += 1; + n_vtable_elems += list_length (BINFO_VIRTUALS (binfo)); +#endif + + /* Set TREE_PUBLIC and TREE_EXTERN as appropriate. */ + import_export_vtable (new_decl, for_type); + + if (TREE_VIA_VIRTUAL (binfo)) + my_friendly_assert (binfo == binfo_member (BINFO_TYPE (binfo), + CLASSTYPE_VBASECLASSES (current_class_type)), + 170); + SET_BINFO_NEW_VTABLE_MARKED (binfo); + SET_BINFO_VTABLE_PATH_MARKED (binfo); + + /* Mark all types between FOR_TYPE and TYPE as having been + touched, so that if we change virtual function table entries, + new vtables will be initialized. We may reach the virtual + baseclass via ambiguous intervening baseclasses. This + loop makes sure we get through to the actual baseclass we marked. + + Also, update the vtable entries to reflect the overrides + of the top-most class (short of the top type). */ + + do + { + result = get_base_distance (basetype, for_type, 0, &path); + for_type = path; + while (path) + { + tree path_binfo = path; + tree path_type = BINFO_TYPE (path); + + if (TREE_VIA_VIRTUAL (path)) + path_binfo = binfo_member (path_type, + CLASSTYPE_VBASECLASSES (current_class_type)); + + SET_BINFO_VTABLE_PATH_MARKED (path_binfo); + if (BINFO_INHERITANCE_CHAIN (path) + && CLASSTYPE_VFIELD (path_type) != NULL_TREE + && (DECL_NAME (CLASSTYPE_VFIELD (BINFO_TYPE (binfo))) + == DECL_NAME (CLASSTYPE_VFIELD (path_type))) + /* This is the baseclass just before the original FOR_TYPE. */ + && BINFO_INHERITANCE_CHAIN (BINFO_INHERITANCE_CHAIN (path)) == NULL_TREE) + { + tree old_virtuals = TREE_CHAIN (BINFO_VIRTUALS (binfo)); + tree new_virtuals = TREE_CHAIN (BINFO_VIRTUALS (path_binfo)); + if (flag_dossier) + { + old_virtuals = TREE_CHAIN (old_virtuals); + new_virtuals = TREE_CHAIN (new_virtuals); + } + while (old_virtuals) + { + TREE_VALUE (old_virtuals) = TREE_VALUE (new_virtuals); + old_virtuals = TREE_CHAIN (old_virtuals); + new_virtuals = TREE_CHAIN (new_virtuals); + } + } + path = BINFO_INHERITANCE_CHAIN (path); + } + } + while (result == -2); +} + +/* Access the virtual function table entry that logically + contains BASE_FNDECL. VIRTUALS is the virtual function table's + initializer. */ +static tree +get_vtable_entry (virtuals, base_fndecl) + tree virtuals, base_fndecl; +{ + unsigned HOST_WIDE_INT i = (HOST_BITS_PER_WIDE_INT >= BITS_PER_WORD +#ifdef VTABLE_USES_MASK + && 0 +#endif + ? (TREE_INT_CST_LOW (DECL_VINDEX (base_fndecl)) + & (((unsigned HOST_WIDE_INT)1<<(BITS_PER_WORD-1))-1)) + : TREE_INT_CST_LOW (DECL_VINDEX (base_fndecl))); + +#ifdef GATHER_STATISTICS + n_vtable_searches += i; +#endif + + while (i > 0) + { + virtuals = TREE_CHAIN (virtuals); + i -= 1; + } + return virtuals; +} + +/* Put new entry ENTRY into virtual function table initializer + VIRTUALS. + + Also update DECL_VINDEX (FNDECL). */ + +static void +modify_vtable_entry (old_entry_in_list, new_entry, fndecl) + tree old_entry_in_list, new_entry, fndecl; +{ + tree base_pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (old_entry_in_list)); + tree vindex; + +#ifdef NOTQUITE + cp_warning ("replaced %D with %D", DECL_ASSEMBLER_NAME (TREE_OPERAND (base_pfn, 0)), DECL_ASSEMBLER_NAME (fndecl)); +#endif + /* We can't put in the really right offset information + here, since we have not yet laid out the class to + take into account virtual base classes. */ + TREE_VALUE (old_entry_in_list) = new_entry; + vindex = DECL_VINDEX (TREE_OPERAND (base_pfn, 0)); + if (TREE_CODE (DECL_VINDEX (fndecl)) != INTEGER_CST) + DECL_VINDEX (fndecl) = vindex; + else + { + if (! tree_int_cst_equal (DECL_VINDEX (fndecl), vindex)) + { + tree elts = CONSTRUCTOR_ELTS (new_entry); + + if (! doing_hard_virtuals) + { + pending_hard_virtuals + = tree_cons (fndecl, FNADDR_FROM_VTABLE_ENTRY (new_entry), + pending_hard_virtuals); + TREE_TYPE (pending_hard_virtuals) = TREE_OPERAND (base_pfn, 0); + return; + } + } + } +} + +/* Check to ensure that the virtual function table slot in VFIELD, + found by DECL_VINDEX of the BASE_FNDECL is in fact from a parent + virtual function table that is the same parent as for the + BASE_FNDECL given to us. */ + +static int +related_vslot (base_fndecl, vfields, type) + tree base_fndecl, vfields, type; +{ + tree base_context = TYPE_MAIN_VARIANT (DECL_CONTEXT (base_fndecl)); + tree base; + tree path; + int distance; + + if (TREE_CODE (vfields) != TREE_LIST) + abort (); + base = VF_NORMAL_VALUE (vfields); + if (base == NULL_TREE) + base = VF_BASETYPE_VALUE (vfields); + + /* The simple right way to do this is to ensure that the context of + the base virtual function is found along the leftmost path + between the most derived type associated with the vfield and the + current type. */ + distance = get_base_distance (base, type, 0, &path); + if (distance == -1) + abort (); + while (path) + { + if (BINFO_TYPE (path) == base_context) + return 1; + path = BINFO_INHERITANCE_CHAIN (path); + } + + /* given: + Rr + / \ + Mm Hh + \ / + P + + make sure we fill in P's vtable for H with overrides of r, + but be cautious of virtual base classes. */ + /* Combine the two below after debugging. */ + if (get_base_distance (base_context, base, 0, &path) != -1) + { + while (path) + { + if (TREE_VIA_VIRTUAL (path)) + return 0; + path = BINFO_INHERITANCE_CHAIN (path); + } + /* Make sure that: + + RRB + | + RL RR + \ / + L R + \ / + C + + returns 0. VF_BASETYPE_VALUE is RL, base_context is RRB, type is C, + and the vfield we are checking is R. */ + if (VF_BASETYPE_VALUE (vfields) + && get_base_distance (base_context, VF_BASETYPE_VALUE (vfields), 0, &path) == -1 + && get_base_distance (VF_BASETYPE_VALUE (vfields), base_context, 0, &path) == -1) + return 0; + return 1; + } + return 0; +} + +static void modify_vtable_entries (); + +/* Access the virtual function table entry i. VIRTUALS is the virtual + function table's initializer. */ +static tree +get_vtable_entry_n (virtuals, i) + tree virtuals; + unsigned HOST_WIDE_INT i; +{ + while (i > 0) + { + virtuals = TREE_CHAIN (virtuals); + i -= 1; + } + return virtuals; +} + +#if 0 +/* Find the vfield (in the CLASSTYPE_VFIELDS chain) of the given binfo. */ +static tree +find_associated_vfield (binfo, t) + tree t, binfo; +{ + tree vfields; + tree save_vfields = 0; + for (vfields = CLASSTYPE_VFIELDS (t); vfields; vfields = TREE_CHAIN (vfields)) + { + if (VF_BINFO_VALUE (vfields) == binfo) + return vfields; + } + for (vfields = CLASSTYPE_VFIELDS (t); vfields; vfields = TREE_CHAIN (vfields)) + { + tree path; + get_base_distance (VF_BASETYPE_VALUE (vfields), t, 0, &path); + while (path) + { + if (path == binfo) + return vfields; + path = BINFO_INHERITANCE_CHAIN (path); + } + } + /* This is from a virtual base class's vtable, hopefully. */ + return 0; +} +#endif + + +/* Returns != 0 is the BINFO is the normal one for the main vfield, 0 + otherwise. We don't have to worry about the finding BINFO in + CLASSTYPE_VBASECLASSES, if it is virtual, as we never inherit + vtables from virtual base classes. */ +static int +is_normal (binfo, t) + tree t, binfo; +{ + tree binfo2; + int i = CLASSTYPE_VFIELD_PARENT (t); + if (i != -1) + { + tree base_binfo = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (t)), i); + if (base_binfo == binfo) + return 1; + } + return 0; +} + +/* Modify virtual function tables in lattice topped by T to place + FNDECL in tables which previously held BASE_FNDECL. This marches + through the vtables directly, looking for exact mactes to + modify. */ +static void +modify_other_vtable_entries (t, binfo, fndecl, base_fndecl, pfn) + tree t, binfo; + tree fndecl, base_fndecl, pfn; +{ + tree vfields, virtuals; + tree binfos; + int i, n_baselinks; + unsigned HOST_WIDE_INT n; + + virtuals = BINFO_VIRTUALS (binfo); + n = 0; + while (virtuals) + { + tree current_fndecl = TREE_VALUE (virtuals); + tree *binfo2_ptr; + current_fndecl = FNADDR_FROM_VTABLE_ENTRY (current_fndecl); + current_fndecl = TREE_OPERAND (current_fndecl, 0); + if (current_fndecl && SAME_FN (current_fndecl, base_fndecl)) + { + /* Most of the below was copied from + modify_vtable_entries (t, fndecl, base_fndecl, pfn); */ + tree base_offset, offset; + tree context = DECL_CLASS_CONTEXT (fndecl); + tree vfield = CLASSTYPE_VFIELD (t); + int normal = 1; + tree binfo2, this_offset; + tree base, path; + + offset = integer_zero_node; + if (context != t && TYPE_USES_COMPLEX_INHERITANCE (t)) + { + offset = virtual_offset (context, CLASSTYPE_VBASECLASSES (t), offset); + if (offset == NULL_TREE) + { + tree binfo = get_binfo (context, t, 0); + offset = BINFO_OFFSET (binfo); + } + } + + /* Get the path starting from the deepest base class CONTEXT + of T (i.e., first defn of BASE_FNDECL). */ + get_base_distance (binfo, t, 0, &path); + binfo2_ptr = 0; + + /* Get our best approximation of what to use for constructing + the virtual function table for T. */ + do + { + /* Walk from base toward derived, stopping at the + most derived baseclass that matters. That baseclass + is exactly the one which provides the vtable along + the VFIELD spine, but no more. */ + if (TREE_VIA_VIRTUAL (path)) + { + base = path; + binfo2 = binfo_member (BINFO_TYPE (base), CLASSTYPE_VBASECLASSES (t)); + /* This should never have TREE_USED set. */ + binfo2_ptr = 0; + break; + } + if (BINFO_INHERITANCE_CHAIN (path) == NULL_TREE + || (BINFO_TYPE (BINFO_BASETYPE (BINFO_INHERITANCE_CHAIN (path), 0)) + != BINFO_TYPE (path)) + || BINFO_INHERITANCE_CHAIN (BINFO_INHERITANCE_CHAIN (path)) == NULL_TREE) + { + base = path; + binfo2 = base; + binfo2_ptr = 0; + break; + } + path = BINFO_INHERITANCE_CHAIN (path); + binfo2_ptr = &BINFO_INHERITANCE_CHAIN (path); + } + while (1); + + /* Find the right offset for the this pointer based on the base + class we just found. */ + base_offset = BINFO_OFFSET (binfo2); + this_offset = size_binop (MINUS_EXPR, offset, base_offset); + + /* Make sure we can modify the derived association with immunity. */ + if (TREE_USED (binfo2)) { + my_friendly_assert (*binfo2_ptr == binfo2, 999); + *binfo2_ptr = copy_binfo (binfo2); + } + +#if 0 + vfields = find_associated_vfield (binfo2, t); + + /* We call this case NORMAL iff this virtual function table + pointer field has its storage reserved in this class. + This is normally the case without virtual baseclasses + or off-center multiple baseclasses. */ + normal = (vfields && vfield != NULL_TREE + && VF_BASETYPE_VALUE (vfields) == DECL_FCONTEXT (vfield) + && (VF_BINFO_VALUE (vfields) == NULL_TREE + || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields)))); + + if (normal && VF_BINFO_VALUE (vfields)) + /* Everything looks normal so far...check that we are really + working from VFIELD's basetype, and not some other appearance + of that basetype in the lattice. */ + normal = (VF_BINFO_VALUE (vfields) + == get_binfo (VF_BASETYPE_VALUE (vfields), t, 0)); +#else + normal = is_normal (binfo2, t); +#endif + + if (normal) + { + /* In this case, it is *type*'s vtable we are modifying. + We start with the approximation that it's vtable is that + of the immediate base class. */ + binfo2 = TYPE_BINFO (t); + if (! BINFO_NEW_VTABLE_MARKED (binfo2)) + build_vtable (TYPE_BINFO (DECL_CONTEXT (vfield)), t); + } + else + { + /* This is our very own copy of `basetype' to play with. + Later, we will fill in all the virtual functions + that override the virtual functions in these base classes + which are not defined by the current type. */ + if (! BINFO_NEW_VTABLE_MARKED (binfo2)) + prepare_fresh_vtable (binfo2, base, t); + } + +#ifdef NOTQUITE + cp_warning ("in %D", DECL_NAME (BINFO_VTABLE (binfo2))); +#endif + modify_vtable_entry (get_vtable_entry_n (BINFO_VIRTUALS (binfo2), n), + build_vtable_entry (this_offset, pfn), + fndecl); + } else if (current_fndecl && DECL_NAME (current_fndecl) == DECL_NAME (base_fndecl)) + { +#ifdef NOTQUITE + cp_warning ("%D not replaced (looking for %D) in %D", DECL_ASSEMBLER_NAME (current_fndecl), DECL_ASSEMBLER_NAME (base_fndecl), DECL_NAME (BINFO_VTABLE (binfo))); +#endif + } + ++n; + virtuals = TREE_CHAIN (virtuals); + } + binfos = BINFO_BASETYPES (binfo); + n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + /* Don't modify virtual bases, as we share them down this way. */ + /* We hope that other places will get things down this direction. */ + if (TREE_VIA_VIRTUAL (base_binfo)) + continue; + modify_other_vtable_entries (t, base_binfo, fndecl, base_fndecl, pfn); + } +} + +/* Modify virtual function tables in lattice topped by T to + place FNDECL in tables which previously held BASE_FNDECL. + PFN is just FNDECL wrapped in an ADDR_EXPR, so that it + is suitable for placement directly into an initializer. + + All distinct virtual function tables that this type uses + must be updated. */ +static void +modify_vtable_entries (t, fndecl, base_fndecl, pfn) + tree t; + tree fndecl, base_fndecl, pfn; +{ + tree base_offset, offset; + tree base_context = DECL_CONTEXT (base_fndecl); + tree context = DECL_CLASS_CONTEXT (fndecl); + tree vfield = CLASSTYPE_VFIELD (t); + tree vfields, vbases; + tree saved_pfn; + +#ifdef NOTQUITE + cp_warning ("modifing all %D into %D for %T", base_fndecl, fndecl, t); + if (DECL_CONTEXT (fndecl) != DECL_CONTEXT (base_fndecl)) + { + cp_warning ("switching contexts from %T to %T for %x", + DECL_CONTEXT (fndecl), + DECL_CONTEXT (base_fndecl), fndecl); + cp_warning ("base was %D, new is %D", DECL_ASSEMBLER_NAME (base_fndecl), + DECL_ASSEMBLER_NAME(fndecl)); + } +#endif + DECL_CONTEXT (fndecl) = DECL_CONTEXT (base_fndecl); + + offset = integer_zero_node; + if (context != t && TYPE_USES_COMPLEX_INHERITANCE (t)) + { + offset = virtual_offset (context, CLASSTYPE_VBASECLASSES (t), offset); + if (offset == NULL_TREE) + { + tree binfo = get_binfo (context, t, 0); + offset = BINFO_OFFSET (binfo); + } + } + + /* For each layer of base class (i.e., the first base class, and each + virtual base class from that one), modify the virtual function table + of the derived class to contain the new virtual function. + A class has as many vfields as it has virtual base classes (total). */ + for (vfields = CLASSTYPE_VFIELDS (t); vfields; vfields = TREE_CHAIN (vfields)) + { + int normal = 1; + tree binfo, this_offset; + tree base, path; + + if (!related_vslot (base_fndecl, vfields, t)) + continue; + + /* Find the right base class for this derived class, call it BASE. */ + base = VF_BASETYPE_VALUE (vfields); + + /* Get the path starting from the deepest base class CONTEXT + of T (i.e., first defn of BASE_FNDECL). */ + get_base_distance (DECL_CONTEXT (base_fndecl), t, 0, &path); + + /* Get our best approximation of what to use for constructing + the virtual function table for T. */ + do + { + /* Walk from base toward derived, stopping at the + most derived baseclass that matters. That baseclass + is exactly the one which provides the vtable along + the VFIELD spine, but no more. */ + if (TREE_VIA_VIRTUAL (path)) + { + base = path; + binfo = binfo_member (BINFO_TYPE (base), CLASSTYPE_VBASECLASSES (t)); + break; + } + if (BINFO_INHERITANCE_CHAIN (path) == NULL_TREE + || (BINFO_TYPE (BINFO_BASETYPE (BINFO_INHERITANCE_CHAIN (path), 0)) + != BINFO_TYPE (path)) + || BINFO_INHERITANCE_CHAIN (BINFO_INHERITANCE_CHAIN (path)) == NULL_TREE) + { + base = path; + binfo = base; + break; + } + path = BINFO_INHERITANCE_CHAIN (path); + } + while (1); + + /* Find the right offset for the this pointer based on the base + class we just found. */ + base_offset = BINFO_OFFSET (binfo); + this_offset = size_binop (MINUS_EXPR, offset, base_offset); + + /* Make sure we can modify the derived association with immunity. */ + if (TREE_USED (TYPE_BINFO (t))) + TYPE_BINFO (t) = copy_binfo (TYPE_BINFO (t)); + + /* We call this case NORMAL iff this virtual function table + pointer field has its storage reserved in this class. + This is normally the case without virtual baseclasses + or off-center multiple baseclasses. */ + normal = (vfield != NULL_TREE + && VF_BASETYPE_VALUE (vfields) == DECL_FCONTEXT (vfield) + && (VF_BINFO_VALUE (vfields) == NULL_TREE + || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields)))); + + if (normal && VF_BINFO_VALUE (vfields)) + /* Everything looks normal so far...check that we are really + working from VFIELD's basetype, and not some other appearance + of that basetype in the lattice. */ + normal = (VF_BINFO_VALUE (vfields) + == get_binfo (VF_BASETYPE_VALUE (vfields), t, 0)); + + if (normal) + { + /* In this case, it is *type*'s vtable we are modifying. + We start with the approximation that it's vtable is that + of the immediate base class. */ + base_context = t; + binfo = TYPE_BINFO (t); + if (! BINFO_NEW_VTABLE_MARKED (binfo)) + build_vtable (TYPE_BINFO (DECL_CONTEXT (vfield)), t); + } + else + { + /* This is our very own copy of `basetype' to play with. + Later, we will fill in all the virtual functions + that override the virtual functions in these base classes + which are not defined by the current type. */ + if (! BINFO_NEW_VTABLE_MARKED (binfo)) + prepare_fresh_vtable (binfo, base, t); + } + + saved_pfn = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (get_vtable_entry (BINFO_VIRTUALS (binfo), base_fndecl))), 0); +#ifdef NOTQUITE + cp_warning ("in %D", DECL_NAME (BINFO_VTABLE (binfo))); +#endif + /* The this_offset can be wrong, if we try and modify an entry + that had been modified once before. */ + if (! SAME_FN (saved_pfn, fndecl)) + { + modify_vtable_entry (get_vtable_entry (BINFO_VIRTUALS (binfo), base_fndecl), + build_vtable_entry (this_offset, pfn), + fndecl); + modify_other_vtable_entries (t, TYPE_BINFO (t), fndecl, saved_pfn, pfn); + } + } + for (vbases = CLASSTYPE_VBASECLASSES (t); vbases; vbases = TREE_CHAIN (vbases)) + { + tree this_offset; + tree base, path; + + if (! BINFO_VTABLE (vbases)) + /* There are only two ways that a type can fail to have + virtual functions: neither it nor any of its base + types define virtual functions (in which case + no updating need be done), or virtual functions + accessible to it come from virtual base classes + (in which case we have or will get them modified + in other passes of this loop). */ + continue; + + base = BINFO_TYPE (vbases); + path = NULL_TREE; + + if (base != base_context + && get_base_distance (base_context, base, 0, &path) == -1) + continue; + + if (path) + this_offset = size_binop (MINUS_EXPR, offset, BINFO_OFFSET (path)); + else + this_offset = offset; + + /* Doesn't matter if not actually from this virtual base class, + but shouldn't come from deeper virtual baseclasses. The enclosing + loop should take care of such baseclasses. */ + while (path) + { + if (TREE_VIA_VIRTUAL (path)) + goto skip; + path = BINFO_INHERITANCE_CHAIN (path); + } + + base_offset = BINFO_OFFSET (vbases); + this_offset = size_binop (MINUS_EXPR, this_offset, base_offset); + + /* Make sure we can modify the derived association with immunity. */ + if (TREE_USED (TYPE_BINFO (t))) + TYPE_BINFO (t) = copy_binfo (TYPE_BINFO (t)); + + /* This is our very own copy of `basetype' to play with. */ + if (! BINFO_NEW_VTABLE_MARKED (vbases)) + { + tree context_binfo = binfo_value (base_context, base); + prepare_fresh_vtable (vbases, context_binfo, t); + } + saved_pfn = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (get_vtable_entry (BINFO_VIRTUALS (vbases), base_fndecl))), 0); +#ifdef NOTQUITE + cp_warning ("in %D", DECL_NAME (BINFO_VTABLE (vbases))); +#endif + /* The this_offset can be wrong, if we try and modify an entry + that had been modified once before. */ + if (! SAME_FN (saved_pfn, fndecl)) + { + modify_vtable_entry (get_vtable_entry (BINFO_VIRTUALS (vbases), + base_fndecl), + build_vtable_entry (this_offset, pfn), + fndecl); + modify_other_vtable_entries (t, TYPE_BINFO (t), fndecl, saved_pfn, pfn); + } + skip: {} + } +} + +static tree +add_virtual_function (pending_virtuals, has_virtual, x, t) + tree pending_virtuals; + int *has_virtual; + tree x; + tree t; /* Structure type. */ +{ + int debug_vbase = 1; + + /* FUNCTION_TYPEs and OFFSET_TYPEs no longer freely + convert to void *. Make such a conversion here. */ + tree vfn = build1 (ADDR_EXPR, ptr_type_node, x); + TREE_CONSTANT (vfn) = 1; + + /* current_class_type may be NULL_TREE in case of error. */ + if (current_class_type) + TREE_ADDRESSABLE (x) = CLASSTYPE_VTABLE_NEEDS_WRITING (current_class_type); + + /* If the virtual function is a redefinition of a prior one, + figure out in which base class the new definition goes, + and if necessary, make a fresh virtual function table + to hold that entry. */ + if (DECL_VINDEX (x) == error_mark_node) + { + tree entry = build_vtable_entry (integer_zero_node, vfn); + + if (flag_dossier && *has_virtual == 0) + { + /* CLASSTYPE_DOSSIER is only used as a Boolean (NULL or not). */ + CLASSTYPE_DOSSIER (t) = integer_one_node; + *has_virtual = 1; + } + + /* Build a new INT_CST for this DECL_VINDEX. */ +#ifdef VTABLE_USES_MASK + SET_DECL_VINDEX (x, build_int_2 (++(*has_virtual), 0)); +#else + { + static tree index_table[256]; + tree index; + int i = ++(*has_virtual); + + if (i >= 256 || index_table[i] == 0) + { + index = build_int_2 (i, 0); + if (i < 256) + index_table[i] = index; + } + else + index = index_table[i]; + + DECL_VINDEX (x) = index; + } +#endif + pending_virtuals = tree_cons (DECL_VINDEX (x), entry, pending_virtuals); + } + /* Happens if declared twice in class or we're not in a class definition. + We will give error later or we've already given it. */ + else if (TREE_CODE (DECL_VINDEX (x)) == INTEGER_CST + || current_class_type == NULL_TREE) + return pending_virtuals; + else if (debug_vbase && TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) + { + /* Need an entry in some other virtual function table. + Deal with this after we have laid out our virtual base classes. */ + pending_hard_virtuals = temp_tree_cons (x, vfn, pending_hard_virtuals); + } + else + { + /* Need an entry in some other virtual function table. + We can do this now. */ + tree base_fndecl_list = DECL_VINDEX (x), base_fndecls, prev = 0; + tree vtable_context = DECL_FCONTEXT (CLASSTYPE_VFIELD (current_class_type)); + tree true_base_fndecl = 0; + + /* First assign DECL_VINDEX from the base vfn with which + we share our vtable. */ + base_fndecls = base_fndecl_list; + while (base_fndecls) + { + if (TREE_CHAIN (base_fndecls) == NULL_TREE + || DECL_FCONTEXT (CLASSTYPE_VFIELD (DECL_CLASS_CONTEXT (TREE_VALUE (base_fndecls)))) == vtable_context) + { + true_base_fndecl = TREE_VALUE (base_fndecls); + modify_vtable_entries (current_class_type, x, + true_base_fndecl, vfn); + if (prev) + TREE_CHAIN (prev) = TREE_CHAIN (base_fndecls); + else + base_fndecl_list = prev; + break; + } + prev = base_fndecls; + base_fndecls = TREE_CHAIN (base_fndecls); + } + + /* Now fill in the rest of the vtables. */ + base_fndecls = base_fndecl_list; + while (base_fndecls) + { + /* If we haven't found one we like, first one wins. */ + if (true_base_fndecl == 0) + true_base_fndecl = TREE_VALUE (base_fndecls); + + modify_vtable_entries (current_class_type, x, + TREE_VALUE (base_fndecls), vfn); + base_fndecls = TREE_CHAIN (base_fndecls); + } + + DECL_CONTEXT (x) = DECL_CONTEXT (true_base_fndecl); + } + return pending_virtuals; +} + +/* Obstack on which to build the vector of class methods. */ +struct obstack class_obstack; +extern struct obstack *current_obstack; + +/* Add method METHOD to class TYPE. This is used when a method + has been defined which did not initially appear in the class definition, + and helps cut down on spurious error messages. + + FIELDS is the entry in the METHOD_VEC vector entry of the class type where + the method should be added. */ +void +add_method (type, fields, method) + tree type, *fields, method; +{ + /* We must make a copy of METHOD here, since we must be sure that + we have exclusive title to this method's DECL_CHAIN. */ + tree decl; + + push_obstacks (&permanent_obstack, &permanent_obstack); + { + decl = copy_node (method); + if (DECL_RTL (decl) == 0 + && (!processing_template_decl + || !uses_template_parms (decl))) + { + make_function_rtl (decl); + DECL_RTL (method) = DECL_RTL (decl); + } + } + + if (fields && *fields) + { + /* Take care not to hide destructor. */ + DECL_CHAIN (decl) = DECL_CHAIN (*fields); + DECL_CHAIN (*fields) = decl; + } + else if (CLASSTYPE_METHOD_VEC (type) == 0) + { + tree method_vec = make_node (TREE_VEC); + if (TYPE_IDENTIFIER (type) == DECL_NAME (decl)) + { + TREE_VEC_ELT (method_vec, 0) = decl; + TREE_VEC_LENGTH (method_vec) = 1; + } + else + { + /* ??? Is it possible for there to have been enough room in the + current chunk for the tree_vec structure but not a tree_vec + plus a tree*? Will this work in that case? */ + obstack_free (current_obstack, method_vec); + obstack_blank (current_obstack, sizeof (struct tree_vec) + sizeof (tree *)); + TREE_VEC_ELT (method_vec, 1) = decl; + TREE_VEC_LENGTH (method_vec) = 2; + obstack_finish (current_obstack); + } + CLASSTYPE_METHOD_VEC (type) = method_vec; + } + else + { + tree method_vec = CLASSTYPE_METHOD_VEC (type); + int len = TREE_VEC_LENGTH (method_vec); + + /* Adding a new ctor or dtor. This is easy because our + METHOD_VEC always has a slot for such entries. */ + if (TYPE_IDENTIFIER (type) == DECL_NAME (decl)) + { + /* TREE_VEC_ELT (method_vec, 0) = decl; */ + if (decl != TREE_VEC_ELT (method_vec, 0)) + { + DECL_CHAIN (decl) = TREE_VEC_ELT (method_vec, 0); + TREE_VEC_ELT (method_vec, 0) = decl; + } + } + else + { + /* This is trickier. We try to extend the TREE_VEC in-place, + but if that does not work, we copy all its data to a new + TREE_VEC that's large enough. */ + struct obstack *ob = &class_obstack; + tree *end = (tree *)obstack_next_free (ob); + + if (end != TREE_VEC_END (method_vec)) + { + ob = current_obstack; + TREE_VEC_LENGTH (method_vec) += 1; + TREE_VEC_ELT (method_vec, len) = NULL_TREE; + method_vec = copy_node (method_vec); + TREE_VEC_LENGTH (method_vec) -= 1; + } + else + { + tree tmp_vec = (tree) obstack_base (ob); + if (obstack_room (ob) < sizeof (tree)) + { + obstack_blank (ob, sizeof (struct tree_common) + + tree_code_length[(int) TREE_VEC] + * sizeof (char *) + + len * sizeof (tree)); + tmp_vec = (tree) obstack_base (ob); + bcopy (method_vec, tmp_vec, + (sizeof (struct tree_common) + + tree_code_length[(int) TREE_VEC] * sizeof (char *) + + (len-1) * sizeof (tree))); + method_vec = tmp_vec; + } + else + obstack_blank (ob, sizeof (tree)); + } + + obstack_finish (ob); + TREE_VEC_ELT (method_vec, len) = decl; + TREE_VEC_LENGTH (method_vec) = len + 1; + CLASSTYPE_METHOD_VEC (type) = method_vec; + + if (TYPE_BINFO_BASETYPES (type) && CLASSTYPE_BASELINK_VEC (type)) + { + /* ??? May be better to know whether these can be extended? */ + tree baselink_vec = CLASSTYPE_BASELINK_VEC (type); + + TREE_VEC_LENGTH (baselink_vec) += 1; + CLASSTYPE_BASELINK_VEC (type) = copy_node (baselink_vec); + TREE_VEC_LENGTH (baselink_vec) -= 1; + + TREE_VEC_ELT (CLASSTYPE_BASELINK_VEC (type), len) = 0; + } + } + } + DECL_CONTEXT (decl) = type; + DECL_CLASS_CONTEXT (decl) = type; + + pop_obstacks (); +} + +/* Subroutines of finish_struct. */ + +/* Look through the list of fields for this struct, deleting + duplicates as we go. This must be recursive to handle + anonymous unions. + + FIELD is the field which may not appear anywhere in FIELDS. + FIELD_PTR, if non-null, is the starting point at which + chained deletions may take place. + The value returned is the first acceptable entry found + in FIELDS. + + Note that anonymous fields which are not of UNION_TYPE are + not duplicates, they are just anonymous fields. This happens + when we have unnamed bitfields, for example. */ +static tree +delete_duplicate_fields_1 (field, field_ptr, fields) + tree field, *field_ptr, fields; +{ + tree x; + tree prev = field_ptr ? *field_ptr : 0; + if (DECL_NAME (field) == 0) + { + if (TREE_CODE (TREE_TYPE (field)) != UNION_TYPE) + return fields; + + for (x = TYPE_FIELDS (TREE_TYPE (field)); x; x = TREE_CHAIN (x)) + fields = delete_duplicate_fields_1 (x, field_ptr, fields); + if (prev) + TREE_CHAIN (prev) = fields; + return fields; + } + else + { + for (x = fields; x; prev = x, x = TREE_CHAIN (x)) + { + if (DECL_NAME (x) == 0) + { + if (TREE_CODE (TREE_TYPE (x)) != UNION_TYPE) + continue; + TYPE_FIELDS (TREE_TYPE (x)) + = delete_duplicate_fields_1 (field, (tree *)0, TYPE_FIELDS (TREE_TYPE (x))); + if (TYPE_FIELDS (TREE_TYPE (x)) == 0) + { + if (prev == 0) + fields = TREE_CHAIN (fields); + else + TREE_CHAIN (prev) = TREE_CHAIN (x); + } + } + else + { + if (DECL_NAME (field) == DECL_NAME (x)) + { + if (TREE_CODE (field) == CONST_DECL + && TREE_CODE (x) == CONST_DECL) + cp_error_at ("duplicate enum value `%D'", x); + else if (TREE_CODE (field) == CONST_DECL + || TREE_CODE (x) == CONST_DECL) + cp_error_at ("duplicate field `%D' (as enum and non-enum)", + x); + else if (TREE_CODE (field) == TYPE_DECL + && TREE_CODE (x) == TYPE_DECL) + cp_error_at ("duplicate class scope type `%D'", x); + else if (TREE_CODE (field) == TYPE_DECL + || TREE_CODE (x) == TYPE_DECL) + cp_error_at ("duplicate field `%D' (as type and non-type)", + x); + else + cp_error_at ("duplicate member `%D'", x); + if (prev == 0) + fields = TREE_CHAIN (fields); + else + TREE_CHAIN (prev) = TREE_CHAIN (x); + } + } + } + } + return fields; +} + +static void +delete_duplicate_fields (fields) + tree fields; +{ + tree x; + for (x = fields; x && TREE_CHAIN (x); x = TREE_CHAIN (x)) + TREE_CHAIN (x) = delete_duplicate_fields_1 (x, &x, TREE_CHAIN (x)); +} + +/* Change the access of FDECL to ACCESS in T. + Return 1 if change was legit, otherwise return 0. */ +static int +alter_access (t, fdecl, access) + tree t; + tree fdecl; + enum access_type access; +{ + tree elem = purpose_member (t, DECL_ACCESS (fdecl)); + if (elem && TREE_VALUE (elem) != (tree)access) + { + if (TREE_CODE (TREE_TYPE (fdecl)) == FUNCTION_DECL) + { + cp_error_at ("conflicting access specifications for method `%D', ignored", TREE_TYPE (fdecl)); + } + else + error ("conflicting access specifications for field `%s', ignored", + IDENTIFIER_POINTER (DECL_NAME (fdecl))); + } + else if (TREE_PRIVATE (fdecl) && access != access_private) + cp_error_at ("cannot make private `%D' non-private", fdecl); + else if (TREE_PROTECTED (fdecl)) + { + if (access == access_public) + cp_error_at ("cannot make protected `%D' public", fdecl); + goto alter; + } + /* ARM 11.3: an access declaration may not be used to restrict access + to a member that is accessible in the base class. */ + else if (TREE_PUBLIC (fdecl) + && (access == access_private + || access == access_protected)) + cp_error_at ("cannot reduce access of public member `%D'", fdecl); + else if (elem == NULL_TREE) + { + alter: + DECL_ACCESS (fdecl) = tree_cons (t, (tree)access, + DECL_ACCESS (fdecl)); + return 1; + } + return 0; +} + +static tree +get_vfield_offset (binfo) + tree binfo; +{ + return size_binop (PLUS_EXPR, + DECL_FIELD_BITPOS (CLASSTYPE_VFIELD (BINFO_TYPE (binfo))), + BINFO_OFFSET (binfo)); +} + +/* If FOR_TYPE needs to reinitialize virtual function table pointers + for TYPE's sub-objects, add such reinitializations to BASE_INIT_LIST. + Returns BASE_INIT_LIST appropriately modified. */ + +static tree +maybe_fixup_vptrs (for_type, binfo, base_init_list) + tree for_type, binfo, base_init_list; +{ + /* Now reinitialize any slots that don't fall under our virtual + function table pointer. */ + tree vfields = CLASSTYPE_VFIELDS (BINFO_TYPE (binfo)); + while (vfields) + { + tree basetype = VF_NORMAL_VALUE (vfields) + ? TYPE_MAIN_VARIANT (VF_NORMAL_VALUE (vfields)) + : VF_BASETYPE_VALUE (vfields); + + tree base_binfo = get_binfo (basetype, for_type, 0); + /* Punt until this is implemented. */ + if (1 /* BINFO_MODIFIED (base_binfo) */) + { + tree base_offset = get_vfield_offset (base_binfo); + if (! tree_int_cst_equal (base_offset, get_vfield_offset (TYPE_BINFO (for_type))) + && ! tree_int_cst_equal (base_offset, get_vfield_offset (binfo))) + base_init_list = tree_cons (error_mark_node, base_binfo, + base_init_list); + } + vfields = TREE_CHAIN (vfields); + } + return base_init_list; +} + +/* If TYPE does not have a constructor, then the compiler must + manually deal with all of the initialization this type requires. + + If a base initializer exists only to fill in the virtual function + table pointer, then we mark that fact with the TREE_VIRTUAL bit. + This way, we avoid multiple initializations of the same field by + each virtual function table up the class hierarchy. + + Virtual base class pointers are not initialized here. They are + initialized only at the "top level" of object creation. If we + initialized them here, we would have to skip a lot of work. */ + +static void +build_class_init_list (type) + tree type; +{ + tree base_init_list = NULL_TREE; + tree member_init_list = NULL_TREE; + + /* Since we build member_init_list and base_init_list using + tree_cons, backwards fields the all through work. */ + tree x; + tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); + int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (x = TYPE_FIELDS (type); x; x = TREE_CHAIN (x)) + { + if (TREE_CODE (x) != FIELD_DECL) + continue; + + if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (x)) + || DECL_INITIAL (x) != NULL_TREE) + member_init_list = tree_cons (x, type, member_init_list); + } + member_init_list = nreverse (member_init_list); + + /* We will end up doing this last. Need special marker + to avoid infinite regress. */ + if (TYPE_VIRTUAL_P (type)) + { + base_init_list = build_tree_list (error_mark_node, TYPE_BINFO (type)); + if (CLASSTYPE_NEEDS_VIRTUAL_REINIT (type) == 0) + TREE_VALUE (base_init_list) = NULL_TREE; + TREE_ADDRESSABLE (base_init_list) = 1; + } + + /* Each base class which needs to have initialization + of some kind gets to make such requests known here. */ + for (i = n_baseclasses-1; i >= 0; i--) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree blist; + + /* Don't initialize virtual baseclasses this way. */ + if (TREE_VIA_VIRTUAL (base_binfo)) + continue; + + if (TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (base_binfo))) + { + /* ...and the last shall come first... */ + base_init_list = maybe_fixup_vptrs (type, base_binfo, base_init_list); + base_init_list = tree_cons (NULL_TREE, base_binfo, base_init_list); + continue; + } + + if ((blist = CLASSTYPE_BASE_INIT_LIST (BINFO_TYPE (base_binfo))) == NULL_TREE) + /* Nothing to initialize. */ + continue; + + /* ...ditto... */ + base_init_list = maybe_fixup_vptrs (type, base_binfo, base_init_list); + + /* This is normally true for single inheritance. + The win is we can shrink the chain of initializations + to be done by only converting to the actual type + we are interested in. */ + if (TREE_VALUE (blist) + && TREE_CODE (TREE_VALUE (blist)) == TREE_VEC + && tree_int_cst_equal (BINFO_OFFSET (base_binfo), + BINFO_OFFSET (TREE_VALUE (blist)))) + { + if (base_init_list) + { + /* Does it do more than just fill in a + virtual function table pointer? */ + if (! TREE_ADDRESSABLE (blist)) + base_init_list = build_tree_list (blist, base_init_list); + /* Can we get by just with the virtual function table + pointer that it fills in? */ + else if (TREE_ADDRESSABLE (base_init_list) + && TREE_VALUE (base_init_list) == 0) + base_init_list = blist; + /* Maybe, but it is not obvious as the previous case. */ + else if (! CLASSTYPE_NEEDS_VIRTUAL_REINIT (type)) + { + tree last = tree_last (base_init_list); + while (TREE_VALUE (last) + && TREE_CODE (TREE_VALUE (last)) == TREE_LIST) + last = tree_last (TREE_VALUE (last)); + if (TREE_VALUE (last) == 0) + base_init_list = build_tree_list (blist, base_init_list); + } + } + else + base_init_list = blist; + } + else + { + /* The function expand_aggr_init knows how to do the + initialization of `basetype' without getting + an explicit `blist'. */ + if (base_init_list) + base_init_list = tree_cons (NULL_TREE, base_binfo, base_init_list); + else + base_init_list = CLASSTYPE_BINFO_AS_LIST (BINFO_TYPE (base_binfo)); + } + } + + if (base_init_list) + if (member_init_list) + CLASSTYPE_BASE_INIT_LIST (type) = build_tree_list (base_init_list, member_init_list); + else + CLASSTYPE_BASE_INIT_LIST (type) = base_init_list; + else if (member_init_list) + CLASSTYPE_BASE_INIT_LIST (type) = member_init_list; +} + +struct base_info +{ + int has_virtual; + int max_has_virtual; + int n_ancestors; + tree vfield; + tree vfields; + char cant_have_default_ctor; + char cant_have_const_ctor; + char cant_synth_copy_ctor; + char cant_synth_asn_ref; + char no_const_asn_ref; + char needs_virtual_dtor; +}; + +/* Record information about type T derived from its base classes. + Store most of that information in T itself, and place the + remaining information in the struct BASE_INFO. + + Propagate basetype offsets throughout the lattice. Note that the + lattice topped by T is really a pair: it's a DAG that gives the + structure of the derivation hierarchy, and it's a list of the + virtual baseclasses that appear anywhere in the DAG. When a vbase + type appears in the DAG, it's offset is 0, and it's children start + their offsets from that point. When a vbase type appears in the list, + its offset is the offset it has in the hierarchy, and its children's + offsets include that offset in theirs. + + Returns the index of the first base class to have virtual functions, + or -1 if no such base class. + + Note that at this point TYPE_BINFO (t) != t_binfo. */ + +static int +finish_base_struct (t, b, t_binfo) + tree t; + struct base_info *b; + tree t_binfo; +{ + tree binfos = BINFO_BASETYPES (t_binfo); + int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; + int first_vfn_base_index = -1; + bzero (b, sizeof (struct base_info)); + + for (i = 0; i < n_baseclasses; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree basetype = BINFO_TYPE (base_binfo); + + /* If the type of basetype is incomplete, then + we already complained about that fact + (and we should have fixed it up as well). */ + if (TYPE_SIZE (basetype) == 0) + { + int j; + /* The base type is of incomplete type. It is + probably best to pretend that it does not + exist. */ + if (i == n_baseclasses-1) + TREE_VEC_ELT (binfos, i) = NULL_TREE; + TREE_VEC_LENGTH (binfos) -= 1; + n_baseclasses -= 1; + for (j = i; j+1 < n_baseclasses; j++) + TREE_VEC_ELT (binfos, j) = TREE_VEC_ELT (binfos, j+1); + } + + if (TYPE_HAS_INIT_REF (basetype) + && !TYPE_HAS_CONST_INIT_REF (basetype)) + b->cant_have_const_ctor = 1; + if (! TYPE_HAS_INIT_REF (basetype) + || (TYPE_HAS_NONPUBLIC_CTOR (basetype) == 2 + && ! is_friend_type (t, basetype))) + b->cant_synth_copy_ctor = 1; + + if (TYPE_HAS_CONSTRUCTOR (basetype) + && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (basetype)) + { + b->cant_have_default_ctor = 1; + if (! TYPE_HAS_CONSTRUCTOR (t)) + { + cp_pedwarn ("base `%T' with only non-default constructor", + basetype); + cp_pedwarn ("in class without a constructor"); + } + } + + if (TYPE_HAS_ASSIGN_REF (basetype) + && !TYPE_HAS_CONST_ASSIGN_REF (basetype)) + b->no_const_asn_ref = 1; + if (! TYPE_HAS_ASSIGN_REF (basetype) + || (TYPE_HAS_NONPUBLIC_ASSIGN_REF (basetype) == 2 + && ! is_friend_type (t, basetype))) + b->cant_synth_asn_ref = 1; + + b->n_ancestors += CLASSTYPE_N_SUPERCLASSES (basetype); + TYPE_NEEDS_CONSTRUCTING (t) |= TYPE_NEEDS_CONSTRUCTING (basetype); + TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_NEEDS_DESTRUCTOR (basetype); + TYPE_HAS_COMPLEX_ASSIGN_REF (t) |= TYPE_HAS_COMPLEX_ASSIGN_REF (basetype); + TYPE_HAS_COMPLEX_INIT_REF (t) |= (TYPE_HAS_COMPLEX_INIT_REF (basetype) + || TYPE_NEEDS_CONSTRUCTING (basetype)); + + TYPE_OVERLOADS_CALL_EXPR (t) |= TYPE_OVERLOADS_CALL_EXPR (basetype); + TYPE_OVERLOADS_ARRAY_REF (t) |= TYPE_OVERLOADS_ARRAY_REF (basetype); + TYPE_OVERLOADS_ARROW (t) |= TYPE_OVERLOADS_ARROW (basetype); + + if (! TREE_VIA_VIRTUAL (base_binfo) +#if 0 + /* This cannot be done, as prepare_fresh_vtable wants to modify + binfos associated with vfields anywhere in the hierarchy, not + just immediate base classes. Due to unsharing, the compiler + might consume 3% more memory on a real program. + */ + && ! BINFO_OFFSET_ZEROP (base_binfo) +#endif + && BINFO_BASETYPES (base_binfo)) + { + tree base_binfos = BINFO_BASETYPES (base_binfo); + tree chain = NULL_TREE; + int j; + + /* Now unshare the structure beneath BASE_BINFO. */ + for (j = TREE_VEC_LENGTH (base_binfos)-1; + j >= 0; j--) + { + tree base_base_binfo = TREE_VEC_ELT (base_binfos, j); + if (! TREE_VIA_VIRTUAL (base_base_binfo)) + TREE_VEC_ELT (base_binfos, j) + = make_binfo (BINFO_OFFSET (base_base_binfo), + BINFO_TYPE (base_base_binfo), + BINFO_VTABLE (base_base_binfo), + BINFO_VIRTUALS (base_base_binfo), + chain); + chain = TREE_VEC_ELT (base_binfos, j); + TREE_VIA_PUBLIC (chain) = TREE_VIA_PUBLIC (base_base_binfo); + TREE_VIA_PROTECTED (chain) = TREE_VIA_PROTECTED (base_base_binfo); + } + + /* Completely unshare potentially shared data, and + update what is ours. */ + propagate_binfo_offsets (base_binfo, BINFO_OFFSET (base_binfo)); + } + + if (! TREE_VIA_VIRTUAL (base_binfo)) + CLASSTYPE_N_SUPERCLASSES (t) += 1; + + if (TYPE_VIRTUAL_P (basetype)) + { + /* If there's going to be a destructor needed, make + sure it will be virtual. */ + b->needs_virtual_dtor = 1; + + /* Don't borrow virtuals from virtual baseclasses. */ + if (TREE_VIA_VIRTUAL (base_binfo)) + continue; + + if (first_vfn_base_index < 0) + { + tree vfields; + first_vfn_base_index = i; + + b->has_virtual = CLASSTYPE_VSIZE (basetype); + b->vfield = CLASSTYPE_VFIELD (basetype); + b->vfields = copy_list (CLASSTYPE_VFIELDS (basetype)); + vfields = b->vfields; + while (vfields) + { + if (VF_BINFO_VALUE (vfields) == NULL_TREE + || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields))) + { + tree value = VF_BASETYPE_VALUE (vfields); + if (DECL_NAME (CLASSTYPE_VFIELD (value)) + == DECL_NAME (CLASSTYPE_VFIELD (basetype))) + VF_NORMAL_VALUE (b->vfields) = basetype; + else + VF_NORMAL_VALUE (b->vfields) = VF_NORMAL_VALUE (vfields); + } + vfields = TREE_CHAIN (vfields); + } + CLASSTYPE_VFIELD (t) = b->vfield; + } + else + { + /* Only add unique vfields, and flatten them out as we go. */ + tree vfields = CLASSTYPE_VFIELDS (basetype); + while (vfields) + { + if (VF_BINFO_VALUE (vfields) == NULL_TREE + || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields))) + { + tree value = VF_BASETYPE_VALUE (vfields); + b->vfields = tree_cons (base_binfo, value, b->vfields); + if (DECL_NAME (CLASSTYPE_VFIELD (value)) + == DECL_NAME (CLASSTYPE_VFIELD (basetype))) + VF_NORMAL_VALUE (b->vfields) = basetype; + else + VF_NORMAL_VALUE (b->vfields) = VF_NORMAL_VALUE (vfields); + } + vfields = TREE_CHAIN (vfields); + } + + if (b->has_virtual == 0) + { + first_vfn_base_index = i; + b->has_virtual = CLASSTYPE_VSIZE (basetype); + b->vfield = CLASSTYPE_VFIELD (basetype); + CLASSTYPE_VFIELD (t) = b->vfield; + /* When we install the first one, set the VF_NORMAL_VALUE + to be the current class, as this it is the most derived + class. Hopefully, this is not set to something else + later. (mrs) */ + vfields = b->vfields; + while (vfields) + { + if (DECL_NAME (CLASSTYPE_VFIELD (t)) + == DECL_NAME (CLASSTYPE_VFIELD (basetype))) + { + VF_NORMAL_VALUE (vfields) = t; + /* There should only be one of them! And it should + always be found, if we get into here. (mrs) */ + break; + } + vfields = TREE_CHAIN (vfields); + } + } + } + } + } + + /* Must come after offsets are fixed for all bases. */ + for (i = 0; i < n_baseclasses; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree basetype = BINFO_TYPE (base_binfo); + + if (get_base_distance (basetype, t_binfo, 0, (tree*)0) == -2) + { + cp_warning ("direct base `%T' inaccessible in `%T' due to ambiguity", + basetype, t); + b->cant_synth_asn_ref = 1; + b->cant_synth_copy_ctor = 1; + } + } + + { + tree vfields; + /* Find the base class with the largest number of virtual functions. */ + for (vfields = b->vfields; vfields; vfields = TREE_CHAIN (vfields)) + { + if (CLASSTYPE_VSIZE (VF_BASETYPE_VALUE (vfields)) > b->max_has_virtual) + b->max_has_virtual = CLASSTYPE_VSIZE (VF_BASETYPE_VALUE (vfields)); + if (VF_DERIVED_VALUE (vfields) + && CLASSTYPE_VSIZE (VF_DERIVED_VALUE (vfields)) > b->max_has_virtual) + b->max_has_virtual = CLASSTYPE_VSIZE (VF_DERIVED_VALUE (vfields)); + } + } + + if (b->vfield == 0) + /* If all virtual functions come only from virtual baseclasses. */ + return -1; + return first_vfn_base_index; +} + +static int +typecode_p (type, code) + tree type; + enum tree_code code; +{ + return (TREE_CODE (type) == code + || (TREE_CODE (type) == REFERENCE_TYPE + && TREE_CODE (TREE_TYPE (type)) == code)); +} + +/* Set memoizing fields and bits of T (and its variants) for later use. + MAX_HAS_VIRTUAL is the largest size of any T's virtual function tables. */ +static void +finish_struct_bits (t, max_has_virtual) + tree t; + int max_has_virtual; +{ + int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (t); + tree method_vec = CLASSTYPE_METHOD_VEC (t); + + /* Fix up variants (if any). */ + tree variants = TYPE_NEXT_VARIANT (t); + while (variants) + { + /* These fields are in the _TYPE part of the node, not in + the TYPE_LANG_SPECIFIC component, so they are not shared. */ + TYPE_HAS_CONSTRUCTOR (variants) = TYPE_HAS_CONSTRUCTOR (t); + TYPE_HAS_DESTRUCTOR (variants) = TYPE_HAS_DESTRUCTOR (t); + TYPE_NEEDS_CONSTRUCTING (variants) = TYPE_NEEDS_CONSTRUCTING (t); + TYPE_NEEDS_DESTRUCTOR (variants) = TYPE_NEEDS_DESTRUCTOR (t); + + TYPE_USES_COMPLEX_INHERITANCE (variants) = TYPE_USES_COMPLEX_INHERITANCE (t); + TYPE_VIRTUAL_P (variants) = TYPE_VIRTUAL_P (t); + TYPE_USES_VIRTUAL_BASECLASSES (variants) = TYPE_USES_VIRTUAL_BASECLASSES (t); + /* Copy whatever these are holding today. */ + TYPE_MIN_VALUE (variants) = TYPE_MIN_VALUE (t); + TYPE_MAX_VALUE (variants) = TYPE_MAX_VALUE (t); + variants = TYPE_NEXT_VARIANT (variants); + } + + if (n_baseclasses && max_has_virtual) + { + /* Done by `finish_struct' for classes without baseclasses. */ + int has_abstract_virtuals = CLASSTYPE_ABSTRACT_VIRTUALS (t) != 0; + tree binfos = TYPE_BINFO_BASETYPES (t); + for (i = n_baseclasses-1; i >= 0; i--) + { + has_abstract_virtuals + |= (CLASSTYPE_ABSTRACT_VIRTUALS (BINFO_TYPE (TREE_VEC_ELT (binfos, i))) != 0); + if (has_abstract_virtuals) + break; + } + if (has_abstract_virtuals) + CLASSTYPE_ABSTRACT_VIRTUALS (t) = get_abstract_virtuals (t); + } + + if (n_baseclasses) + { + /* Notice whether this class has type conversion functions defined. */ + tree binfo = TYPE_BINFO (t); + tree binfos = BINFO_BASETYPES (binfo); + tree basetype; + + for (i = n_baseclasses-1; i >= 0; i--) + { + basetype = BINFO_TYPE (TREE_VEC_ELT (binfos, i)); + + if (TYPE_HAS_CONVERSION (basetype)) + { + TYPE_HAS_CONVERSION (t) = 1; + TYPE_HAS_INT_CONVERSION (t) |= TYPE_HAS_INT_CONVERSION (basetype); + TYPE_HAS_REAL_CONVERSION (t) |= TYPE_HAS_REAL_CONVERSION (basetype); + } + if (CLASSTYPE_MAX_DEPTH (basetype) >= CLASSTYPE_MAX_DEPTH (t)) + CLASSTYPE_MAX_DEPTH (t) = CLASSTYPE_MAX_DEPTH (basetype) + 1; + } + } + + /* Need to test METHOD_VEC here in case all methods + (conversions and otherwise) are inherited. */ + if (TYPE_HAS_CONVERSION (t) && method_vec != NULL_TREE) + { + tree first_conversions[last_conversion_type]; + tree last_conversions[last_conversion_type]; + enum conversion_type conv_index; + tree *tmp; + int i; + + bzero (first_conversions, sizeof (first_conversions)); + bzero (last_conversions, sizeof (last_conversions)); + for (tmp = &TREE_VEC_ELT (method_vec, 1); + tmp != TREE_VEC_END (method_vec); tmp += 1) + { + /* ??? This should compare DECL_NAME (*tmp) == ansi_opname[TYPE_EXPR]. */ + if (IDENTIFIER_TYPENAME_P (DECL_ASSEMBLER_NAME (*tmp))) + { + tree fntype = TREE_TYPE (*tmp); + tree return_type = TREE_TYPE (fntype); + my_friendly_assert (TREE_CODE (fntype) == METHOD_TYPE, 171); + + if (typecode_p (return_type, POINTER_TYPE)) + { + if (TYPE_READONLY (TREE_TYPE (return_type))) + conv_index = constptr_conv; + else + conv_index = ptr_conv; + } + else if (typecode_p (return_type, INTEGER_TYPE)) + { + TYPE_HAS_INT_CONVERSION (t) = 1; + conv_index = int_conv; + } + else if (typecode_p (return_type, REAL_TYPE)) + { + TYPE_HAS_REAL_CONVERSION (t) = 1; + conv_index = real_conv; + } + else + continue; + + if (first_conversions[(int) conv_index] == NULL_TREE) + first_conversions[(int) conv_index] = *tmp; + last_conversions[(int) conv_index] = *tmp; + } + } + + for (i = 0; i < (int) last_conversion_type; i++) + if (first_conversions[i] != last_conversions[i]) + CLASSTYPE_CONVERSION (t, i) = error_mark_node; + else + CLASSTYPE_CONVERSION (t, i) = first_conversions[i]; + } + + /* If this type has constructors, force its mode to be BLKmode, + and force its TREE_ADDRESSABLE bit to be nonzero. */ + if (TYPE_NEEDS_CONSTRUCTING (t) || TYPE_NEEDS_DESTRUCTOR (t)) + { + tree variants = t; + + if (TREE_CODE (TYPE_NAME (t)) == TYPE_DECL) + DECL_MODE (TYPE_NAME (t)) = BLKmode; + while (variants) + { + TYPE_MODE (variants) = BLKmode; + TREE_ADDRESSABLE (variants) = 1; + variants = TYPE_NEXT_VARIANT (variants); + } + } +} + +/* Warn about duplicate methods in fn_fields. Also compact method + lists so that lookup can be made faster. + + Algorithm: Outer loop builds lists by method name. Inner loop + checks for redundant method names within a list. + + Data Structure: List of method lists. The outer list is a + TREE_LIST, whose TREE_PURPOSE field is the field name and the + TREE_VALUE is the TREE_CHAIN of the FUNCTION_DECLs. Friends are + chained in the same way as member functions, but they live in the + TREE_TYPE field of the outer list. That allows them to be quickly + deleted, and requires no extra storage. + + If there are any constructors/destructors, they are moved to the + front of the list. This makes pushclass more efficient. + + We also link each field which has shares a name with its baseclass + to the head of the list of fields for that base class. This allows + us to reduce search time in places like `build_method_call' to + consider only reasonably likely functions. */ + +static tree +finish_struct_methods (t, fn_fields, nonprivate_method) + tree t; + tree fn_fields; + int nonprivate_method; +{ + tree method_vec; + tree name = constructor_name (t); + int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (t); + + /* Now prepare to gather fn_fields into vector. */ + struct obstack *ambient_obstack = current_obstack; + current_obstack = &class_obstack; + method_vec = make_node (TREE_VEC); + /* Room has been saved for constructors and destructors. */ + current_obstack = ambient_obstack; + /* Now make this a live vector. */ + obstack_free (&class_obstack, method_vec); + obstack_blank (&class_obstack, sizeof (struct tree_vec)); + + while (fn_fields) + { + /* NEXT Pointer, TEST Pointer, and BASE Pointer. */ + tree nextp, *testp; + tree fn_name = DECL_NAME (fn_fields); + if (fn_name == NULL_TREE) + fn_name = name; + + nextp = TREE_CHAIN (fn_fields); + TREE_CHAIN (fn_fields) = NULL_TREE; + + /* Clear out this flag. + + @@ Doug may figure out how to break + @@ this with nested classes and friends. */ + DECL_IN_AGGR_P (fn_fields) = 0; + + /* Note here that a copy ctor is private, so we don't dare generate + a default copy constructor for a class that has a member + of this type without making sure they have access to it. */ + if (fn_name == name) + { + tree parmtypes = FUNCTION_ARG_CHAIN (fn_fields); + tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node; + + if (TREE_CODE (parmtype) == REFERENCE_TYPE + && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == t) + { + if (TREE_CHAIN (parmtypes) == NULL_TREE + || TREE_CHAIN (parmtypes) == void_list_node + || TREE_PURPOSE (TREE_CHAIN (parmtypes))) + { + if (TREE_PROTECTED (fn_fields)) + TYPE_HAS_NONPUBLIC_CTOR (t) = 1; + else if (TREE_PRIVATE (fn_fields)) + TYPE_HAS_NONPUBLIC_CTOR (t) = 2; + } + } + } + else if (fn_name == ansi_opname[(int) MODIFY_EXPR]) + { + tree parmtype = TREE_VALUE (FUNCTION_ARG_CHAIN (fn_fields)); + + if (TREE_CODE (parmtype) == REFERENCE_TYPE + && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == t) + { + if (TREE_PROTECTED (fn_fields)) + TYPE_HAS_NONPUBLIC_ASSIGN_REF (t) = 1; + else if (TREE_PRIVATE (fn_fields)) + TYPE_HAS_NONPUBLIC_ASSIGN_REF (t) = 2; + } + } + + /* Constructors are handled easily in search routines. + Besides, we know we won't find any, so do not bother looking. */ + if (fn_name == name && TREE_VEC_ELT (method_vec, 0) == 0) + TREE_VEC_ELT (method_vec, 0) = fn_fields; + else + { + testp = &TREE_VEC_ELT (method_vec, 0); + if (*testp == NULL_TREE) + testp++; + while (((HOST_WIDE_INT) testp + < (HOST_WIDE_INT) obstack_next_free (&class_obstack)) + && DECL_NAME (*testp) != fn_name) + testp++; + if ((HOST_WIDE_INT) testp + < (HOST_WIDE_INT) obstack_next_free (&class_obstack)) + { + tree x, prev_x; + + for (x = *testp; x; x = DECL_CHAIN (x)) + { + if (DECL_NAME (fn_fields) == ansi_opname[(int) DELETE_EXPR]) + { + /* ANSI C++ June 5 1992 WP 12.5.5.1 */ + cp_error_at ("`%D' overloaded", fn_fields); + cp_error_at ("previous declaration as `%D' here", x); + } + if (DECL_ASSEMBLER_NAME (fn_fields)==DECL_ASSEMBLER_NAME (x)) + { + /* We complain about multiple destructors on sight, + so we do not repeat the warning here. Friend-friend + ambiguities are warned about outside this loop. */ + if (!DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (fn_fields))) + cp_error_at ("ambiguous method `%#D' in structure", + fn_fields); + break; + } + prev_x = x; + } + if (x == 0) + { + if (*testp) + DECL_CHAIN (prev_x) = fn_fields; + else + *testp = fn_fields; + } + } + else + { + obstack_ptr_grow (&class_obstack, fn_fields); + method_vec = (tree)obstack_base (&class_obstack); + } + } + fn_fields = nextp; + } + + TREE_VEC_LENGTH (method_vec) = (tree *)obstack_next_free (&class_obstack) + - (&TREE_VEC_ELT (method_vec, 0)); + obstack_finish (&class_obstack); + CLASSTYPE_METHOD_VEC (t) = method_vec; + + if (nonprivate_method == 0 + && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE + && DECL_FRIENDLIST (TYPE_NAME (t)) == NULL_TREE) + { + tree binfos = BINFO_BASETYPES (TYPE_BINFO (t)); + for (i = 0; i < n_baseclasses; i++) + if (TREE_VIA_PUBLIC (TREE_VEC_ELT (binfos, i)) + || TREE_VIA_PROTECTED (TREE_VEC_ELT (binfos, i))) + { + nonprivate_method = 1; + break; + } + if (nonprivate_method == 0) + cp_warning ("all member functions in class `%T' are private", t); + } + + /* If there are constructors (and destructors), they are at the + front. Place destructors at very front. Also warn if all + constructors and/or destructors are private (in which case this + class is effectively unusable. */ + if (TYPE_HAS_DESTRUCTOR (t)) + { + tree dtor, prev; + + for (dtor = TREE_VEC_ELT (method_vec, 0); + dtor; + prev = dtor, dtor = DECL_CHAIN (dtor)) + { + if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (dtor))) + { + if (TREE_PRIVATE (dtor) + && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE + && DECL_FRIENDLIST (TYPE_NAME (t)) == NULL_TREE + && warn_ctor_dtor_privacy) + warning ("class `%s' only defines a private destructor and has no friends", + TYPE_NAME_STRING (t)); + break; + } + } + + /* Wild parse errors can cause this to happen. */ + if (dtor == NULL_TREE) + TYPE_HAS_DESTRUCTOR (t) = 0; + else if (dtor != TREE_VEC_ELT (method_vec, 0)) + { + DECL_CHAIN (prev) = DECL_CHAIN (dtor); + DECL_CHAIN (dtor) = TREE_VEC_ELT (method_vec, 0); + TREE_VEC_ELT (method_vec, 0) = dtor; + } + } + + /* Now for each member function (except for constructors and + destructors), compute where member functions of the same + name reside in base classes. */ + if (n_baseclasses != 0 + && TREE_VEC_LENGTH (method_vec) > 1) + { + int len = TREE_VEC_LENGTH (method_vec); + tree baselink_vec = make_tree_vec (len); + int any_links = 0; + tree baselink_binfo = build_tree_list (NULL_TREE, TYPE_BINFO (t)); + + for (i = 1; i < len; i++) + { + TREE_VEC_ELT (baselink_vec, i) + = get_baselinks (baselink_binfo, t, DECL_NAME (TREE_VEC_ELT (method_vec, i))); + if (TREE_VEC_ELT (baselink_vec, i) != 0) + any_links = 1; + } + if (any_links != 0) + CLASSTYPE_BASELINK_VEC (t) = baselink_vec; + else + obstack_free (current_obstack, baselink_vec); + } + + /* Now add the methods to the TYPE_METHODS of T, arranged in a chain. */ + { + tree x, last_x = NULL_TREE; + int limit = TREE_VEC_LENGTH (method_vec); + + for (i = 1; i < limit; i++) + { + for (x = TREE_VEC_ELT (method_vec, i); x; x = DECL_CHAIN (x)) + { + if (last_x != NULL_TREE) + TREE_CHAIN (last_x) = x; + last_x = x; + } + } + + /* Put ctors and dtors at the front of the list. */ + x = TREE_VEC_ELT (method_vec, 0); + if (x) + { + while (DECL_CHAIN (x)) + { + /* Let's avoid being circular about this. */ + if (x == DECL_CHAIN (x)) + break; + TREE_CHAIN (x) = DECL_CHAIN (x); + x = DECL_CHAIN (x); + } + if (TREE_VEC_LENGTH (method_vec) > 1) + TREE_CHAIN (x) = TREE_VEC_ELT (method_vec, 1); + else + TREE_CHAIN (x) = NULL_TREE; + } + } + +#if 0 + TYPE_METHODS (t) = TREE_VEC_ELT (method_vec, 0) + ? TREE_VEC_ELT (method_vec, 0) : TREE_VEC_ELT (method_vec, 1); +#else + TYPE_METHODS (t) = method_vec; +#endif + + return method_vec; +} + +/* Emit error when a duplicate definition of a type is seen. Patch up. */ + +void +duplicate_tag_error (t) + tree t; +{ + cp_error ("redefinition of `%#T'", t); + + /* Pretend we haven't defined this type. */ + + /* All of the component_decl's were TREE_CHAINed together in the parser. + finish_struct_methods walks these chains and assembles all methods with + the same base name into DECL_CHAINs. Now we don't need the parser chains + anymore, so we unravel them. + */ + /* + * This used to be in finish_struct, but it turns out that the + * TREE_CHAIN is used by dbxout_type_methods and perhaps some other things... + */ + if (CLASSTYPE_METHOD_VEC(t)) + { + tree tv = CLASSTYPE_METHOD_VEC(t); + int i, len = TREE_VEC_LENGTH (tv); + for (i = 0; i < len; i++) + { + tree unchain = TREE_VEC_ELT (tv, i); + while (unchain != NULL_TREE) + { + TREE_CHAIN (unchain) = NULL_TREE; + unchain = DECL_CHAIN(unchain); + } + } + } + + if (TYPE_LANG_SPECIFIC (t)) + { + tree as_list = CLASSTYPE_AS_LIST (t); + tree binfo = TYPE_BINFO (t); + tree binfo_as_list = CLASSTYPE_BINFO_AS_LIST (t); + int interface_only = CLASSTYPE_INTERFACE_ONLY (t); + int interface_unknown = CLASSTYPE_INTERFACE_UNKNOWN (t); + + bzero (TYPE_LANG_SPECIFIC (t), sizeof (struct lang_type)); + BINFO_BASETYPES(binfo) = NULL_TREE; + + CLASSTYPE_AS_LIST (t) = as_list; + TYPE_BINFO (t) = binfo; + CLASSTYPE_BINFO_AS_LIST (t) = binfo_as_list; + CLASSTYPE_INTERFACE_ONLY (t) = interface_only; + SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown); + CLASSTYPE_VBASE_SIZE (t) = integer_zero_node; + TYPE_REDEFINED (t) = 1; + } + TYPE_SIZE (t) = NULL_TREE; + TYPE_MODE (t) = VOIDmode; + TYPE_FIELDS (t) = NULL_TREE; + TYPE_METHODS (t) = NULL_TREE; + TYPE_VFIELD (t) = NULL_TREE; + TYPE_CONTEXT (t) = NULL_TREE; +} + +/* Create a RECORD_TYPE or UNION_TYPE node for a C struct or union declaration + (or C++ class declaration). + + For C++, we must handle the building of derived classes. + Also, C++ allows static class members. The way that this is + handled is to keep the field name where it is (as the DECL_NAME + of the field), and place the overloaded decl in the DECL_FIELD_BITPOS + of the field. layout_record and layout_union will know about this. + + More C++ hair: inline functions have text in their + DECL_PENDING_INLINE_INFO nodes which must somehow be parsed into + meaningful tree structure. After the struct has been laid out, set + things up so that this can happen. + + And still more: virtual functions. In the case of single inheritance, + when a new virtual function is seen which redefines a virtual function + from the base class, the new virtual function is placed into + the virtual function table at exactly the same address that + it had in the base class. When this is extended to multiple + inheritance, the same thing happens, except that multiple virtual + function tables must be maintained. The first virtual function + table is treated in exactly the same way as in the case of single + inheritance. Additional virtual function tables have different + DELTAs, which tell how to adjust `this' to point to the right thing. + + LIST_OF_FIELDLISTS is just that. The elements of the list are + TREE_LIST elements, whose TREE_PURPOSE field tells what access + the list has, and the TREE_VALUE slot gives the actual fields. + + If flag_all_virtual == 1, then we lay all functions into + the virtual function table, as though they were declared + virtual. Constructors do not lay down in the virtual function table. + + If flag_all_virtual == 2, then we lay all functions into + the virtual function table, such that virtual functions + occupy a space by themselves, and then all functions + of the class occupy a space by themselves. This is illustrated + in the following diagram: + + class A; class B : A; + + Class A's vtbl: Class B's vtbl: + -------------------------------------------------------------------- + | A's virtual functions| | B's virtual functions | + | | | (may inherit some from A). | + -------------------------------------------------------------------- + | All of A's functions | | All of A's functions | + | (such as a->A::f). | | (such as b->A::f) | + -------------------------------------------------------------------- + | B's new virtual functions | + | (not defined in A.) | + ------------------------------- + | All of B's functions | + | (such as b->B::f) | + ------------------------------- + + this allows the program to make references to any function, virtual + or otherwise in a type-consistent manner. */ + +tree +finish_struct (t, list_of_fieldlists, warn_anon) + tree t; + tree list_of_fieldlists; + int warn_anon; +{ + extern int interface_only, interface_unknown; + extern tree EHS_type; + + int old; + int round_up_size = 1; + + enum tree_code code = TREE_CODE (t); + register tree x, last_x, method_vec; + int needs_virtual_dtor; + tree name = TYPE_NAME (t), fields, fn_fields, tail; + enum access_type access; + int all_virtual; + int has_virtual; + int max_has_virtual; + tree pending_virtuals = NULL_TREE; + tree abstract_virtuals = NULL_TREE; + tree vfield; + tree vfields; + int cant_have_default_ctor; + int cant_have_const_ctor; + int cant_synth_copy_ctor; + int cant_synth_asn_ref; + int no_const_asn_ref; + + /* The index of the first base class which has virtual + functions. Only applied to non-virtual baseclasses. */ + int first_vfn_base_index; + + int n_baseclasses; + int any_default_members = 0; + int const_sans_init = 0; + int ref_sans_init = 0; + int do_mem_init = 0; + int nonprivate_method = 0; + tree t_binfo = TYPE_BINFO (t); + tree access_decls = 0; + + if (TREE_CODE (name) == TYPE_DECL) + { +#if 0 /* Maybe later. -jason */ + struct tinst_level *til = tinst_for_decl(); + + if (til) + { + DECL_SOURCE_FILE (name) = til->file; + if (DECL_SOURCE_LINE (name)) + DECL_SOURCE_LINE (name) = til->line; + } + else +#endif + { + extern int lineno; + + DECL_SOURCE_FILE (name) = input_filename; + /* For TYPE_DECL that are not typedefs (those marked with a line + number of zero, we don't want to mark them as real typedefs. + If this fails one needs to make sure real typedefs have a + previous line number, even if it is wrong, that way the below + will fill in the right line number. (mrs) */ + if (DECL_SOURCE_LINE (name)) + DECL_SOURCE_LINE (name) = lineno; + } + name = DECL_NAME (name); + } + + if (warn_anon && code != UNION_TYPE && ANON_AGGRNAME_P (name)) + warning ("anonymous class type not used to declare any objects"); + +#if 0 + /* This is set here, but it's never actually used anywhere. (bpk) */ + leftmost_baseclasses = NULL_TREE; +#endif + if (TYPE_SIZE (t)) + { + if (IS_AGGR_TYPE (t)) + cp_error ("redefinition of `%#T'", t); + else + my_friendly_abort (172); + popclass (0); + return t; + } + + /* Append the fields we need for constructing signature tables. */ + if (IS_SIGNATURE (t)) + append_signature_fields (list_of_fieldlists); + + GNU_xref_decl (current_function_decl, t); + + /* If this type was previously laid out as a forward reference, + make sure we lay it out again. */ + + TYPE_SIZE (t) = 0; + CLASSTYPE_GOT_SEMICOLON (t) = 0; + + /* A signature type will contain the fields of the signature table. + Therefore, it's not only an interface. */ + if (IS_SIGNATURE (t)) + { + CLASSTYPE_INTERFACE_ONLY (t) = 0; + SET_CLASSTYPE_INTERFACE_KNOWN (t); + } + else + { + CLASSTYPE_INTERFACE_ONLY (t) = interface_only; + SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown); + } + + if (flag_dossier) + build_t_desc (t, 0); + + TYPE_BINFO (t) = NULL_TREE; + + old = suspend_momentary (); + + /* Install struct as DECL_FIELD_CONTEXT of each field decl. + Also process specified field sizes. + Set DECL_FIELD_SIZE to the specified size, or 0 if none specified. + The specified size is found in the DECL_INITIAL. + Store 0 there, except for ": 0" fields (so we can find them + and delete them, below). */ + + if (t_binfo && BINFO_BASETYPES (t_binfo)) + n_baseclasses = TREE_VEC_LENGTH (BINFO_BASETYPES (t_binfo)); + else + n_baseclasses = 0; + + if (n_baseclasses > 0) + { + struct base_info base_info; + + /* If using multiple inheritance, this may cause variants of our + basetypes to be used (instead of their canonical forms). */ + fields = layout_basetypes (t, BINFO_BASETYPES (t_binfo)); + last_x = tree_last (fields); + + first_vfn_base_index = finish_base_struct (t, &base_info, t_binfo); + /* Remember where we got our vfield from */ + CLASSTYPE_VFIELD_PARENT (t) = first_vfn_base_index; + has_virtual = base_info.has_virtual; + max_has_virtual = base_info.max_has_virtual; + CLASSTYPE_N_SUPERCLASSES (t) += base_info.n_ancestors; + vfield = base_info.vfield; + vfields = base_info.vfields; + cant_have_default_ctor = base_info.cant_have_default_ctor; + cant_have_const_ctor = base_info.cant_have_const_ctor; + cant_synth_copy_ctor = base_info.cant_synth_copy_ctor; + cant_synth_asn_ref = base_info.cant_synth_asn_ref; + no_const_asn_ref = base_info.no_const_asn_ref; + needs_virtual_dtor = base_info.needs_virtual_dtor; + n_baseclasses = TREE_VEC_LENGTH (BINFO_BASETYPES (t_binfo)); + } + else + { + first_vfn_base_index = -1; + has_virtual = 0; + max_has_virtual = has_virtual; + vfield = NULL_TREE; + vfields = NULL_TREE; + fields = NULL_TREE; + last_x = NULL_TREE; + cant_have_default_ctor = 0; + cant_have_const_ctor = 0; + cant_synth_copy_ctor = 0; + cant_synth_asn_ref = 0; + no_const_asn_ref = 0; + needs_virtual_dtor = 0; + } + + if (write_virtuals == 3 && CLASSTYPE_INTERFACE_KNOWN (t) + && current_lang_name == lang_name_cplusplus && ! IS_SIGNATURE (t)) + { + CLASSTYPE_INTERFACE_ONLY (t) = interface_only; + CLASSTYPE_VTABLE_NEEDS_WRITING (t) = ! interface_only; + } + else if (IS_SIGNATURE (t)) + CLASSTYPE_VTABLE_NEEDS_WRITING (t) = 0; + + /* The three of these are approximations which may later be + modified. Needed at this point to make add_virtual_function + and modify_vtable_entries work. */ + TREE_CHAIN (t_binfo) = TYPE_BINFO (t); + TYPE_BINFO (t) = t_binfo; + CLASSTYPE_VFIELDS (t) = vfields; + CLASSTYPE_VFIELD (t) = vfield; + + fn_fields = NULL_TREE; + tail = NULL_TREE; + if (last_x && list_of_fieldlists) + TREE_CHAIN (last_x) = TREE_VALUE (list_of_fieldlists); + + if (IS_SIGNATURE (t)) + all_virtual = 0; + else if (flag_all_virtual == 1 && TYPE_OVERLOADS_METHOD_CALL_EXPR (t)) + all_virtual = 1; + else + all_virtual = 0; + + /* For signatures, we made all methods `public' in the parser and + reported an error if a access specifier was used. */ + if (CLASSTYPE_DECLARED_CLASS (t) == 0) + { + nonprivate_method = 1; + if (list_of_fieldlists + && TREE_PURPOSE (list_of_fieldlists) == (tree)access_default) + TREE_PURPOSE (list_of_fieldlists) = (tree)access_public; + } + else if (list_of_fieldlists + && TREE_PURPOSE (list_of_fieldlists) == (tree)access_default) + TREE_PURPOSE (list_of_fieldlists) = (tree)access_private; + + while (list_of_fieldlists) + { + access = (enum access_type)TREE_PURPOSE (list_of_fieldlists); + + for (x = TREE_VALUE (list_of_fieldlists); x; x = TREE_CHAIN (x)) + { + TREE_PRIVATE (x) = access == access_private; + TREE_PROTECTED (x) = access == access_protected; + GNU_xref_member (current_class_name, x); + + if (TREE_CODE (x) == TYPE_DECL) + { + /* Make sure we set this up. In find_scoped_type, it explicitly + looks for a TYPE_DECL in the TYPE_FIELDS list. If we don't + do this here, we'll miss including this TYPE_DECL in the + list. */ + if (! fields) + fields = x; + last_x = x; + DECL_CONTEXT (x) = t; + continue; + } + + + if (TREE_CODE (x) == FUNCTION_DECL) + { + nonprivate_method |= ! TREE_PRIVATE (x); + + /* If this was an evil function, don't keep it in class. */ + if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (x))) + continue; + + if (last_x) + TREE_CHAIN (last_x) = TREE_CHAIN (x); + if (! fn_fields) + fn_fields = x; + else + TREE_CHAIN (tail) = x; + tail = x; + +#if 0 + /* ??? What if we have duplicate declarations + in T's definition? */ + if (DECL_CLASS_CONTEXT (x)) + continue; +#endif + DECL_CLASS_CONTEXT (x) = t; + + DECL_FIELD_SIZE (x) = 0; + + /* The name of the field is the original field name + Save this in auxiliary field for later overloading. */ + if (DECL_VINDEX (x) + || (all_virtual == 1 && ! DECL_CONSTRUCTOR_P (x))) + { + pending_virtuals = add_virtual_function (pending_virtuals, + &has_virtual, x, t); + if (DECL_ABSTRACT_VIRTUAL_P (x)) + abstract_virtuals = tree_cons (NULL_TREE, x, abstract_virtuals); + } + continue; + } + + /* Handle access declarations. */ + if (DECL_NAME (x) && TREE_CODE (DECL_NAME (x)) == SCOPE_REF) + { + tree fdecl = TREE_OPERAND (DECL_NAME (x), 1); + + if (last_x) + TREE_CHAIN (last_x) = TREE_CHAIN (x); + access_decls = tree_cons ((tree) access, fdecl, access_decls); + continue; + } + + /* If we've gotten this far, it's a data member, possibly static, + or an enumerator. */ + + DECL_FIELD_CONTEXT (x) = t; + + /* ``A local class cannot have static data members.'' ARM 9.4 */ + if (current_function_decl && TREE_STATIC (x)) + cp_error_at ("field `%D' in local class cannot be static", x); + + /* Perform error checking that did not get done in + grokdeclarator. */ + if (TREE_CODE (TREE_TYPE (x)) == FUNCTION_TYPE) + { + cp_error_at ("field `%D' invalidly declared function type", + x); + TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); + } + else if (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE) + { + cp_error_at ("field `%D' invalidly declared method type", x); + TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); + } + else if (TREE_CODE (TREE_TYPE (x)) == OFFSET_TYPE) + { + cp_error_at ("field `%D' invalidly declared offset type", x); + TREE_TYPE (x) = build_pointer_type (TREE_TYPE (x)); + } + + if (TREE_TYPE (x) == error_mark_node) + continue; + + if (! fields) + fields = x; + last_x = x; + + DECL_FIELD_SIZE (x) = 0; + + /* When this goes into scope, it will be a non-local reference. */ + DECL_NONLOCAL (x) = 1; + + if (TREE_CODE (x) == CONST_DECL) + continue; + + if (TREE_CODE (x) == VAR_DECL) + { + if (TREE_CODE (t) == UNION_TYPE) + /* Unions cannot have static members. */ + cp_error_at ("field `%D' declared static in union", x); + + continue; + } + + /* Now it can only be a FIELD_DECL. */ + + /* If this is of reference type, check if it needs an init. + Also do a little ANSI jig if necessary. */ + if (TREE_CODE (TREE_TYPE (x)) == REFERENCE_TYPE) + { + if (DECL_INITIAL (x) == NULL_TREE) + ref_sans_init = 1; + + /* ARM $12.6.2: [A member initializer list] is the only + way to initialize a nonstatic const and reference + [member]. */ + cant_synth_asn_ref = 1; + cant_have_default_ctor = 1; + TYPE_HAS_COMPLEX_INIT_REF (t) = 1; + + if (! TYPE_HAS_CONSTRUCTOR (t)) + { + if (DECL_NAME (x)) + cp_pedwarn_at ("non-static reference `%#D' in class without a constructor", x); + else + cp_pedwarn_at ("non-static reference in class without a constructor", x); + } + } + + /* If any field is const, the structure type is pseudo-const. */ + if (TREE_READONLY (x)) + { + C_TYPE_FIELDS_READONLY (t) = 1; + if (DECL_INITIAL (x) == NULL_TREE) + const_sans_init = 1; + + /* ARM $12.6.2: [A member initializer list] is the only + way to initialize a nonstatic const and reference + [member]. */ + cant_synth_asn_ref = 1; + cant_have_default_ctor = 1; + TYPE_HAS_COMPLEX_INIT_REF (t) = 1; + + if (! TYPE_HAS_CONSTRUCTOR (t) && !IS_SIGNATURE (t)) + { + if (DECL_NAME (x)) + cp_pedwarn_at ("non-static const member `%#D' in class without a constructor", x); + else + cp_pedwarn_at ("non-static const member in class without a constructor", x); + } + } + else + { + /* A field that is pseudo-const makes the structure + likewise. */ + tree t1 = TREE_TYPE (x); + while (TREE_CODE (t1) == ARRAY_TYPE) + t1 = TREE_TYPE (t1); + if (IS_AGGR_TYPE (t1)) + { + if (C_TYPE_FIELDS_READONLY (t1)) + C_TYPE_FIELDS_READONLY (t) = 1; + if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (t1)) + const_sans_init = 1; + } + } + + /* We set DECL_BIT_FIELD tentatively in grokbitfield. + If the type and width are valid, we'll keep it set. + Otherwise, the flag is cleared. */ + if (DECL_BIT_FIELD (x)) + { + DECL_BIT_FIELD (x) = 0; + /* Invalid bit-field size done by grokfield. */ + /* Detect invalid bit-field type. */ + if (DECL_INITIAL (x) + && TREE_CODE (TREE_TYPE (x)) != INTEGER_TYPE + && TREE_CODE (TREE_TYPE (x)) != ENUMERAL_TYPE) + { + cp_error_at ("bit-field `%D' has invalid type", x); + DECL_INITIAL (x) = NULL; + } + + /* Detect and ignore out of range field width. */ + if (DECL_INITIAL (x)) + { + register int width = TREE_INT_CST_LOW (DECL_INITIAL (x)); + + if (width < 0) + { + DECL_INITIAL (x) = NULL; + cp_error_at ("negative width in bit-field `%D'", x); + } + else if (width == 0 && DECL_NAME (x) != 0) + { + DECL_INITIAL (x) = NULL; + cp_error_at ("zero width for bit-field `%D'", x); + } + else if ((unsigned)width > TYPE_PRECISION (TREE_TYPE (x))) + { + DECL_INITIAL (x) = NULL; + cp_error_at ("width of `%D' exceeds its type", x); + } + } + + /* Process valid field width. */ + if (DECL_INITIAL (x)) + { + register int width = TREE_INT_CST_LOW (DECL_INITIAL (x)); + + if (width == 0) + { +#ifdef EMPTY_FIELD_BOUNDARY + /* field size 0 => mark following field as "aligned" */ + if (TREE_CHAIN (x)) + DECL_ALIGN (TREE_CHAIN (x)) + = MAX (DECL_ALIGN (TREE_CHAIN (x)), EMPTY_FIELD_BOUNDARY); + /* field of size 0 at the end => round up the size. */ + else + round_up_size = EMPTY_FIELD_BOUNDARY; +#endif +#ifdef PCC_BITFIELD_TYPE_MATTERS + DECL_ALIGN (x) = MAX (DECL_ALIGN (x), + TYPE_ALIGN (TREE_TYPE (x))); +#endif + } + else + { + DECL_INITIAL (x) = NULL_TREE; + DECL_FIELD_SIZE (x) = width; + DECL_BIT_FIELD (x) = 1; + /* Traditionally a bit field is unsigned + even if declared signed. */ + if (flag_traditional + && TREE_CODE (TREE_TYPE (x)) == INTEGER_TYPE) + TREE_TYPE (x) = unsigned_type_node; + } + } + else + /* Non-bit-fields are aligned for their type. */ + DECL_ALIGN (x) = MAX (DECL_ALIGN (x), TYPE_ALIGN (TREE_TYPE (x))); + } + else + { + tree type = TREE_TYPE (x); + + if (TREE_CODE (type) == ARRAY_TYPE) + type = TREE_TYPE (type); + + if (TYPE_LANG_SPECIFIC (type) && ! ANON_UNION_P (x)) + { + /* Never let anything with uninheritable virtuals + make it through without complaint. */ + if (CLASSTYPE_ABSTRACT_VIRTUALS (type)) + abstract_virtuals_error (x, type); + + /* Don't let signatures make it through either. */ + if (IS_SIGNATURE (type)) + signature_error (x, type); + + if (code == UNION_TYPE) + { + char * fie = 0; + if (TYPE_NEEDS_CONSTRUCTING (type)) + fie = "constructor"; + else if (TYPE_NEEDS_DESTRUCTOR (type)) + fie = "destructor"; + else if (TYPE_HAS_REAL_ASSIGNMENT (type)) + fie = "assignment operator"; + if (fie) + cp_error_at ("member `%#D' with %s not allowed in union", x, + fie); + } + else + { + TYPE_NEEDS_CONSTRUCTING (t) |= TYPE_NEEDS_CONSTRUCTING (type); + TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_NEEDS_DESTRUCTOR (type); + TYPE_HAS_COMPLEX_ASSIGN_REF (t) |= TYPE_HAS_COMPLEX_ASSIGN_REF (type); + TYPE_HAS_COMPLEX_INIT_REF (t) + |= (TYPE_HAS_COMPLEX_INIT_REF (type) + || TYPE_NEEDS_CONSTRUCTING (type)); + } + + if (! TYPE_HAS_INIT_REF (type) + || (TYPE_HAS_NONPUBLIC_CTOR (type) + && ! is_friend (t, type))) + cant_synth_copy_ctor = 1; + else if (!TYPE_HAS_CONST_INIT_REF (type)) + cant_have_const_ctor = 1; + + if (! TYPE_HAS_ASSIGN_REF (type) + || (TYPE_HAS_NONPUBLIC_ASSIGN_REF (type) + && ! is_friend (t, type))) + cant_synth_asn_ref = 1; + else if (!TYPE_HAS_CONST_ASSIGN_REF (type)) + no_const_asn_ref = 1; + + if (TYPE_HAS_CONSTRUCTOR (type) + && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) + { + cant_have_default_ctor = 1; + if (! TYPE_HAS_CONSTRUCTOR (t)) + { + if (DECL_NAME (x)) + cp_pedwarn_at ("member `%#D' with only non-default constructor", x); + else + cp_pedwarn_at ("member with only non-default constructor", x); + cp_pedwarn_at ("in class without a constructor", + x); + } + } + } + if (DECL_INITIAL (x) != NULL_TREE) + { + /* `build_class_init_list' does not recognize + non-FIELD_DECLs. */ + if (code == UNION_TYPE && any_default_members != 0) + cp_error_at ("multiple fields in union `%T' initialized"); + any_default_members = 1; + } + } + } + list_of_fieldlists = TREE_CHAIN (list_of_fieldlists); + /* link the tail while we have it! */ + if (last_x) + { + TREE_CHAIN (last_x) = NULL_TREE; + + if (list_of_fieldlists + && TREE_VALUE (list_of_fieldlists) + && TREE_CODE (TREE_VALUE (list_of_fieldlists)) != FUNCTION_DECL) + TREE_CHAIN (last_x) = TREE_VALUE (list_of_fieldlists); + } + } + + if (tail) TREE_CHAIN (tail) = NULL_TREE; + + /* If this type has any constant members which did not come + with their own initialization, mark that fact here. It is + not an error here, since such types can be saved either by their + constructors, or by fortuitous initialization. */ + CLASSTYPE_READONLY_FIELDS_NEED_INIT (t) = const_sans_init; + CLASSTYPE_REF_FIELDS_NEED_INIT (t) = ref_sans_init; + CLASSTYPE_ABSTRACT_VIRTUALS (t) = abstract_virtuals; + + if (TYPE_NEEDS_DESTRUCTOR (t) && !TYPE_HAS_DESTRUCTOR (t) + && !IS_SIGNATURE (t)) + { + /* Here we must cons up a destructor on the fly. */ + tree dtor = cons_up_default_function (t, name, fields, + needs_virtual_dtor != 0); + + /* If we couldn't make it work, then pretend we didn't need it. */ + if (dtor == void_type_node) + TYPE_NEEDS_DESTRUCTOR (t) = 0; + else + { + if (! fn_fields) + fn_fields = dtor; + else + TREE_CHAIN (tail) = dtor; + tail = dtor; + + if (DECL_VINDEX (dtor) == NULL_TREE + && ! CLASSTYPE_DECLARED_EXCEPTION (t) + && (needs_virtual_dtor + || pending_virtuals != NULL_TREE + || pending_hard_virtuals != NULL_TREE)) + DECL_VINDEX (dtor) = error_mark_node; + if (DECL_VINDEX (dtor)) + pending_virtuals = add_virtual_function (pending_virtuals, + &has_virtual, dtor, NULL_TREE); + nonprivate_method = 1; + } + } + + TYPE_NEEDS_DESTRUCTOR (t) |= TYPE_HAS_DESTRUCTOR (t); + + /* Synthesize any needed methods. Note that methods will be synthesized + for anonymous unions; grok_x_components undoes that. */ + + if (! fn_fields) + nonprivate_method = 1; + + TYPE_HAS_COMPLEX_INIT_REF (t) + |= (TYPE_HAS_INIT_REF (t) || TYPE_USES_VIRTUAL_BASECLASSES (t) + || has_virtual || any_default_members || first_vfn_base_index >= 0); + TYPE_NEEDS_CONSTRUCTING (t) + |= (TYPE_HAS_CONSTRUCTOR (t) || TYPE_USES_VIRTUAL_BASECLASSES (t) + || has_virtual || any_default_members || first_vfn_base_index >= 0); + + /* ARM $12.1: A default constructor will be generated for a class X + only if no constructor has been declared for class X. So we + check TYPE_HAS_CONSTRUCTOR also, to make sure we don't generate + one if they declared a constructor in this class. */ + if (! TYPE_HAS_CONSTRUCTOR (t) && ! cant_have_default_ctor) + { + tree default_fn = cons_up_default_function (t, name, fields, 2); + TREE_CHAIN (default_fn) = fn_fields; + fn_fields = default_fn; + } + + /* Create default copy constructor, if needed. Don't do it for + the exception handler. */ + if (! TYPE_HAS_INIT_REF (t) && ! cant_synth_copy_ctor && t != EHS_type) + { + /* ARM 12.18: You get either X(X&) or X(const X&), but + not both. --Chip */ + tree default_fn = + cons_up_default_function (t, name, fields, + cant_have_const_ctor ? 4 : 3); + TREE_CHAIN (default_fn) = fn_fields; + fn_fields = default_fn; + } + + TYPE_HAS_REAL_ASSIGNMENT (t) |= TYPE_HAS_ASSIGNMENT (t); + TYPE_HAS_REAL_ASSIGN_REF (t) |= TYPE_HAS_ASSIGN_REF (t); + TYPE_HAS_COMPLEX_ASSIGN_REF (t) + |= (TYPE_HAS_ASSIGN_REF (t) || TYPE_USES_VIRTUAL_BASECLASSES (t) + || has_virtual || first_vfn_base_index >= 0); + + if (! TYPE_HAS_ASSIGN_REF (t) && ! cant_synth_asn_ref) + { + tree default_fn = + cons_up_default_function (t, name, fields, + no_const_asn_ref ? 6 : 5); + TREE_CHAIN (default_fn) = fn_fields; + fn_fields = default_fn; + } + + if (fn_fields) + { + method_vec = finish_struct_methods (t, fn_fields, nonprivate_method); + + if (TYPE_HAS_CONSTRUCTOR (t) + && ! CLASSTYPE_DECLARED_EXCEPTION (t) + && CLASSTYPE_FRIEND_CLASSES (t) == NULL_TREE + && DECL_FRIENDLIST (TYPE_NAME (t)) == NULL_TREE) + { + int nonprivate_ctor = 0; + tree ctor; + + for (ctor = TREE_VEC_ELT (method_vec, 0); + ctor; + ctor = DECL_CHAIN (ctor)) + if (! TREE_PRIVATE (ctor)) + { + nonprivate_ctor = 1; + break; + } + + if (nonprivate_ctor == 0 && warn_ctor_dtor_privacy) + cp_warning ("`%#T' only defines private constructors and has no friends", + t); + } + } + else + { + method_vec = 0; + + /* Just in case these got accidentally + filled in by syntax errors. */ + TYPE_HAS_CONSTRUCTOR (t) = 0; + TYPE_HAS_DESTRUCTOR (t) = 0; + } + + { + int n_methods = TREE_VEC_LENGTH (method_vec); + + for (access_decls = nreverse (access_decls); access_decls; + access_decls = TREE_CHAIN (access_decls)) + { + tree fdecl = TREE_VALUE (access_decls); + tree flist = NULL_TREE; + tree name; + enum access_type access = (enum access_type)TREE_PURPOSE(access_decls); + int i = 0; + tree tmp; + + if (TREE_CODE (fdecl) == TREE_LIST) + { + flist = fdecl; + fdecl = TREE_VALUE (flist); + } + + name = DECL_NAME (fdecl); + + for (; i < n_methods; i++) + if (DECL_NAME (TREE_VEC_ELT (method_vec, i)) == name) + { + cp_error ("cannot adjust access to `%#D' in `%#T'", fdecl, t); + cp_error_at ("because of local method `%#D' with same name", + TREE_VEC_ELT (method_vec, i)); + fdecl = 0; + break; + } + + if (! fdecl) + continue; + + for (tmp = fields; tmp; tmp = TREE_CHAIN (tmp)) + if (DECL_NAME (tmp) == name) + { + cp_error ("cannot adjust access to `%#D' in `%#T'", fdecl, t); + cp_error_at ("because of local field `%#D' with same name", tmp); + fdecl = 0; + break; + } + + if (!fdecl) + continue; + + /* Make type T see field decl FDECL with access ACCESS.*/ + if (flist) + { + fdecl = TREE_VALUE (flist); + while (fdecl) + { + if (alter_access (t, fdecl, access) == 0) + break; + fdecl = DECL_CHAIN (fdecl); + } + } + else + alter_access (t, fdecl, access); + } + + } + + if (vfield == NULL_TREE && has_virtual) + { + /* We build this decl with ptr_type_node, and + change the type when we know what it should be. */ + vfield = build_lang_field_decl (FIELD_DECL, get_vfield_name (t), + ptr_type_node); + /* If you change any of the below, take a look at all the + other VFIELD_BASEs and VTABLE_BASEs in the code, and change + them too. */ + DECL_ASSEMBLER_NAME (vfield) = get_identifier (VFIELD_BASE); + CLASSTYPE_VFIELD (t) = vfield; + DECL_VIRTUAL_P (vfield) = 1; + DECL_FIELD_CONTEXT (vfield) = t; + DECL_CLASS_CONTEXT (vfield) = t; + DECL_FCONTEXT (vfield) = t; + DECL_FIELD_SIZE (vfield) = 0; + DECL_ALIGN (vfield) = TYPE_ALIGN (ptr_type_node); + if (CLASSTYPE_DOSSIER (t)) + { + /* vfield is always first entry in structure. */ + TREE_CHAIN (vfield) = fields; + fields = vfield; + } + else if (last_x) + { + my_friendly_assert (TREE_CHAIN (last_x) == 0, 175); + TREE_CHAIN (last_x) = vfield; + last_x = vfield; + } + else + fields = vfield; + vfields = chainon (vfields, CLASSTYPE_AS_LIST (t)); + } + + /* Now DECL_INITIAL is null on all members except for zero-width bit-fields. + And they have already done their work. + + C++: maybe we will support default field initialization some day... */ + + /* Delete all zero-width bit-fields from the front of the fieldlist */ + while (fields && DECL_BIT_FIELD (fields) + && DECL_INITIAL (fields)) + fields = TREE_CHAIN (fields); + /* Delete all such fields from the rest of the fields. */ + for (x = fields; x;) + { + if (TREE_CHAIN (x) && DECL_BIT_FIELD (TREE_CHAIN (x)) + && DECL_INITIAL (TREE_CHAIN (x))) + TREE_CHAIN (x) = TREE_CHAIN (TREE_CHAIN (x)); + else + x = TREE_CHAIN (x); + } + /* Delete all duplicate fields from the fields */ + delete_duplicate_fields (fields); + + /* Now we have the final fieldlist for the data fields. Record it, + then lay out the structure or union (including the fields). */ + + TYPE_FIELDS (t) = fields; + + /* If there's a :0 field at the end, round the size to the + EMPTY_FIELD_BOUNDARY. */ + TYPE_ALIGN (t) = round_up_size; + + /* Pass layout information about base classes to layout_type, if any. */ + + { + tree field; + for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field)) + { + if (TREE_STATIC (field)) + continue; + if (TREE_CODE (field) != FIELD_DECL) + continue; + + /* If this field is an anonymous union, + give each union-member the same position as the union has. + + ??? This is a real kludge because it makes the structure + of the types look strange. This feature is only used by + C++, which should have build_component_ref build two + COMPONENT_REF operations, one for the union and one for + the inner field. We set the offset of this field to zero + so that either the old or the correct method will work. + Setting DECL_FIELD_CONTEXT is wrong unless the inner fields are + moved into the type of this field, but nothing seems to break + by doing this. */ + + if (DECL_NAME (field) == 0 + && TREE_CODE (TREE_TYPE (field)) == UNION_TYPE) + { + tree uelt = TYPE_FIELDS (TREE_TYPE (field)); + for (; uelt; uelt = TREE_CHAIN (uelt)) + { + DECL_FIELD_CONTEXT (uelt) = DECL_FIELD_CONTEXT (field); + DECL_FIELD_BITPOS (uelt) = DECL_FIELD_BITPOS (field); + } + + DECL_FIELD_BITPOS (field) = integer_zero_node; + } + } + } + + if (n_baseclasses) + { + tree pseudo_basetype = TREE_TYPE (base_layout_decl); + + TREE_CHAIN (base_layout_decl) = TYPE_FIELDS (t); + TYPE_FIELDS (t) = base_layout_decl; + + TYPE_SIZE (pseudo_basetype) = CLASSTYPE_SIZE (t); + TYPE_MODE (pseudo_basetype) = TYPE_MODE (t); + TYPE_ALIGN (pseudo_basetype) = CLASSTYPE_ALIGN (t); + DECL_ALIGN (base_layout_decl) = TYPE_ALIGN (pseudo_basetype); + /* Don't re-use old size. */ + DECL_SIZE (base_layout_decl) = 0; + } + + layout_type (t); + + { + tree field; + for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field)) + { + if (TREE_STATIC (field)) + continue; + if (TREE_CODE (field) != FIELD_DECL) + continue; + + /* If this field is an anonymous union, + give each union-member the same position as the union has. + + ??? This is a real kludge because it makes the structure + of the types look strange. This feature is only used by + C++, which should have build_component_ref build two + COMPONENT_REF operations, one for the union and one for + the inner field. We set the offset of this field to zero + so that either the old or the correct method will work. + Setting DECL_FIELD_CONTEXT is wrong unless the inner fields are + moved into the type of this field, but nothing seems to break + by doing this. */ + + if (DECL_NAME (field) == 0 + && TREE_CODE (TREE_TYPE (field)) == UNION_TYPE) + { + tree uelt = TYPE_FIELDS (TREE_TYPE (field)); + for (; uelt; uelt = TREE_CHAIN (uelt)) + { + DECL_FIELD_CONTEXT (uelt) = DECL_FIELD_CONTEXT (field); + DECL_FIELD_BITPOS (uelt) = DECL_FIELD_BITPOS (field); + } + + DECL_FIELD_BITPOS (field) = integer_zero_node; + } + } + } + + if (n_baseclasses) + TYPE_FIELDS (t) = TREE_CHAIN (TYPE_FIELDS (t)); + + /* C++: do not let empty structures exist. */ + if (integer_zerop (TYPE_SIZE (t))) + TYPE_SIZE (t) = TYPE_SIZE (char_type_node); + + /* Set the TYPE_DECL for this type to contain the right + value for DECL_OFFSET, so that we can use it as part + of a COMPONENT_REF for multiple inheritance. */ + + if (TREE_CODE (TYPE_NAME (t)) == TYPE_DECL) + layout_decl (TYPE_NAME (t), 0); + + /* Now fix up any virtual base class types that we + left lying around. We must get these done + before we try to lay out the virtual function table. */ + doing_hard_virtuals = 1; + pending_hard_virtuals = nreverse (pending_hard_virtuals); + + if (TYPE_USES_VIRTUAL_BASECLASSES (t)) + { + tree vbases; + + max_has_virtual = layout_vbasetypes (t, max_has_virtual); + vbases = CLASSTYPE_VBASECLASSES (t); + CLASSTYPE_N_VBASECLASSES (t) = list_length (vbases); + + while (vbases) + { + /* Update dossier info with offsets for virtual baseclasses. */ + if (flag_dossier && ! BINFO_NEW_VTABLE_MARKED (vbases)) + prepare_fresh_vtable (vbases, vbases, t); + + vbases = TREE_CHAIN (vbases); + } + } + +#ifdef NOTQUITE + cp_warning ("Doing hard virtuals for %T...", t); +#endif + while (pending_hard_virtuals) + { + /* Need an entry in some other virtual function table. */ + if (TREE_TYPE (pending_hard_virtuals)) + { + /* This is how we modify entries when a vfn's index changes + between derived and base type. */ + modify_vtable_entries (t, TREE_PURPOSE (pending_hard_virtuals), + TREE_TYPE (pending_hard_virtuals), + TREE_VALUE (pending_hard_virtuals)); + } + else + { + /* This is how we modify entries when a vfn comes from + a virtual baseclass. */ + tree base_fndecls = DECL_VINDEX (TREE_PURPOSE (pending_hard_virtuals)); + /* Only do this, if it was missed before. */ + if (TREE_CODE (base_fndecls) != INTEGER_CST) + { + my_friendly_assert (base_fndecls != error_mark_node, 176); + while (base_fndecls) + { + modify_vtable_entries (t, TREE_PURPOSE (pending_hard_virtuals), + TREE_VALUE (base_fndecls), + TREE_VALUE (pending_hard_virtuals)); + modify_other_vtable_entries (t, TYPE_BINFO (t), + TREE_PURPOSE (pending_hard_virtuals), + TREE_VALUE (base_fndecls), + TREE_VALUE (pending_hard_virtuals)); + base_fndecls = TREE_CHAIN (base_fndecls); + } + } else { +#ifdef NOTQUITE + cp_warning ("missed bases for `%D'", TREE_PURPOSE (pending_hard_virtuals)); +#endif + } + } + pending_hard_virtuals = TREE_CHAIN (pending_hard_virtuals); + } + + if (TYPE_USES_VIRTUAL_BASECLASSES (t)) + { + tree vbases; + + vbases = CLASSTYPE_VBASECLASSES (t); + CLASSTYPE_N_VBASECLASSES (t) = list_length (vbases); + + /* This loop makes all the entries in the virtual function tables + of interest contain the "latest" version of the functions + we have defined. */ + + while (vbases) + { + tree virtuals = BINFO_VIRTUALS (vbases); + + if (virtuals) + { + /* Get past the `null' vtable entry... */ + virtuals = TREE_CHAIN (virtuals); + /* and the `dossier' vtable entry if we're doing dossiers. */ + if (flag_dossier) + virtuals = TREE_CHAIN (virtuals); + } + + while (virtuals != NULL_TREE) + { + tree pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (virtuals)); + tree base_fndecl = TREE_OPERAND (pfn, 0); + tree decl = get_first_matching_virtual (TYPE_BINFO (t), base_fndecl, + DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (base_fndecl))); + tree context = DECL_CLASS_CONTEXT (decl); + if (! SAME_FN (decl, base_fndecl)) + { + tree base_context = DECL_CLASS_CONTEXT (base_fndecl); + tree binfo = NULL_TREE, these_virtuals; +#if 0 + unsigned HOST_WIDE_INT i + = (TREE_INT_CST_LOW (DECL_VINDEX (base_fndecl)) + & (((unsigned HOST_WIDE_INT)1<<(BITS_PER_WORD-1))-1)); +#endif + + if (TYPE_USES_VIRTUAL_BASECLASSES (context)) + binfo = virtual_member (base_context, + CLASSTYPE_VBASECLASSES (context)); + if (binfo == NULL_TREE) + binfo = binfo_value (base_context, context); + if (binfo != NULL_TREE) + { +#if 1 + pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (get_vtable_entry (BINFO_VIRTUALS (binfo), base_fndecl))); +#else + these_virtuals = BINFO_VIRTUALS (binfo); + + while (i-- > 0) + these_virtuals = TREE_CHAIN (these_virtuals); + pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (these_virtuals)); +#endif + pfn = build1 (ADDR_EXPR, ptr_type_node, decl); + TREE_CONSTANT (pfn) = 1; + modify_vtable_entries (t, decl, base_fndecl, pfn); + } + } + virtuals = TREE_CHAIN (virtuals); + } + + vbases = TREE_CHAIN (vbases); + } + } + doing_hard_virtuals = 0; + + /* Under our model of GC, every C++ class gets its own virtual + function table, at least virtually. */ + if (pending_virtuals || CLASSTYPE_DOSSIER (t)) + { + pending_virtuals = nreverse (pending_virtuals); + /* We must enter these virtuals into the table. */ + if (first_vfn_base_index < 0) + { + if (flag_dossier) + pending_virtuals = tree_cons (NULL_TREE, + build_vtable_entry (integer_zero_node, + build_t_desc (t, 0)), + pending_virtuals); + pending_virtuals = tree_cons (NULL_TREE, the_null_vtable_entry, + pending_virtuals); + build_vtable (NULL_TREE, t); + } + else + { + /* Here we know enough to change the type of our virtual + function table, but we will wait until later this function. */ + + if (! BINFO_NEW_VTABLE_MARKED (TYPE_BINFO (t))) + build_vtable (TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), first_vfn_base_index), t); + + /* Update the dossier pointer for this class. */ + if (flag_dossier) + TREE_VALUE (TREE_CHAIN (TYPE_BINFO_VIRTUALS (t))) + = build_vtable_entry (integer_zero_node, build_t_desc (t, 0)); + } + + /* If this type has basetypes with constructors, then those + constructors might clobber the virtual function table. But + they don't if the derived class shares the exact vtable of the base + class. */ + + CLASSTYPE_NEEDS_VIRTUAL_REINIT (t) = 1; + } + else if (first_vfn_base_index >= 0) + { + tree binfo = TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), first_vfn_base_index); +#if 0 + /* For testing. */ + tree binfo1 = get_binfo (DECL_FIELD_CONTEXT (vfield), t, 0); + if (binfo != binfo1) + warning ("binfos are different in vtable creation"); +#endif + + /* This class contributes nothing new to the virtual function + table. However, it may have declared functions which + went into the virtual function table "inherited" from the + base class. If so, we grab a copy of those updated functions, + and pretend they are ours. */ + + /* See if we should steal the virtual info from base class. */ + if (TYPE_BINFO_VTABLE (t) == NULL_TREE) + TYPE_BINFO_VTABLE (t) = BINFO_VTABLE (binfo); + if (TYPE_BINFO_VIRTUALS (t) == NULL_TREE) + TYPE_BINFO_VIRTUALS (t) = BINFO_VIRTUALS (binfo); + if (TYPE_BINFO_VTABLE (t) != BINFO_VTABLE (binfo)) + CLASSTYPE_NEEDS_VIRTUAL_REINIT (t) = 1; + } + + if (has_virtual > max_has_virtual) + max_has_virtual = has_virtual; + if (max_has_virtual || first_vfn_base_index >= 0) + { +#ifdef VTABLE_USES_MASK + if (max_has_virtual >= VINDEX_MAX) + { + cp_error ("too many virtual functions for `%#T' (VINDEX_MAX < %d)", + t, has_virtual); + } +#endif + TYPE_VIRTUAL_P (t) = 1; + CLASSTYPE_VSIZE (t) = has_virtual; + if (first_vfn_base_index >= 0) + { + if (pending_virtuals) + TYPE_BINFO_VIRTUALS (t) = chainon (TYPE_BINFO_VIRTUALS (t), + pending_virtuals); + } + else if (has_virtual) + { + TYPE_BINFO_VIRTUALS (t) = pending_virtuals; + if (write_virtuals >= 0) + DECL_VIRTUAL_P (TYPE_BINFO_VTABLE (t)) = 1; + } + } + + /* Now lay out the virtual function table. */ + if (has_virtual) + { + tree atype, itype; + + if (TREE_TYPE (vfield) == ptr_type_node) + { + /* We must create a pointer to this table because + the one inherited from base class does not exist. + We will fill in the type when we know what it + should really be. Use `size_int' so values are memoized + in common cases. */ + itype = build_index_type (size_int (has_virtual)); + atype = build_array_type (vtable_entry_type, itype); + layout_type (atype); + TREE_TYPE (vfield) = build_pointer_type (atype); + } + else + { + atype = TREE_TYPE (TREE_TYPE (vfield)); + + if (has_virtual != TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (atype)))) + { + /* We must extend (or create) the boundaries on this array, + because we picked up virtual functions from multiple + base classes. */ + itype = build_index_type (size_int (has_virtual)); + atype = build_array_type (vtable_entry_type, itype); + layout_type (atype); + vfield = copy_node (vfield); + TREE_TYPE (vfield) = build_pointer_type (atype); + } + } + + CLASSTYPE_VFIELD (t) = vfield; + if (TREE_TYPE (TYPE_BINFO_VTABLE (t)) != atype) + { + TREE_TYPE (TYPE_BINFO_VTABLE (t)) = atype; + layout_decl (TYPE_BINFO_VTABLE (t), 0); + /* At one time the vtable info was grabbed 2 words at a time. This + fails on sparc unless you have 8-byte alignment. (tiemann) */ + DECL_ALIGN (TYPE_BINFO_VTABLE (t)) + = MAX (TYPE_ALIGN (double_type_node), + DECL_ALIGN (TYPE_BINFO_VTABLE (t))); + } + } + else if (first_vfn_base_index >= 0) + CLASSTYPE_VFIELD (t) = vfield; + CLASSTYPE_VFIELDS (t) = vfields; + + finish_struct_bits (t, max_has_virtual); + + /* Promote each bit-field's type to int if it is narrower than that. + There's more: complete the rtl for any static member objects which + is of the same type we're working on. */ + for (x = fields; x; x = TREE_CHAIN (x)) + { + if (DECL_BIT_FIELD (x) + && (C_PROMOTING_INTEGER_TYPE_P (TREE_TYPE (x)) + || DECL_FIELD_SIZE (x) < TYPE_PRECISION (integer_type_node))) + { + tree type = TREE_TYPE (x); + + /* Preserve unsignedness if traditional or if not really getting + any wider. */ + if (TREE_UNSIGNED (type) + && (flag_traditional + || + (TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node) + && DECL_FIELD_SIZE (x) == TYPE_PRECISION (integer_type_node)))) + TREE_TYPE (x) = unsigned_type_node; + else + TREE_TYPE (x) = integer_type_node; + } + + if (TREE_CODE (x) == VAR_DECL && TREE_STATIC (x) + && TREE_TYPE (x) == t) + { + DECL_MODE (x) = TYPE_MODE (t); + make_decl_rtl (x, NULL, 0); + } + } + + /* Now add the tags, if any, to the list of TYPE_DECLs + defined for this type. */ + if (CLASSTYPE_TAGS (t)) + { + x = CLASSTYPE_TAGS (t); + last_x = tree_last (TYPE_FIELDS (t)); + while (x) + { + tree tag = build_lang_decl (TYPE_DECL, TREE_PURPOSE (x), TREE_VALUE (x)); +#ifdef DWARF_DEBUGGING_INFO + if (write_symbols == DWARF_DEBUG) + { + /* Notify dwarfout.c that this TYPE_DECL node represent a + gratuitous typedef. */ + DECL_IGNORED_P (tag) = 1; + } +#endif /* DWARF_DEBUGGING_INFO */ + DECL_CONTEXT (tag) = t; + DECL_CLASS_CONTEXT (tag) = t; + x = TREE_CHAIN (x); + last_x = chainon (last_x, tag); + } + if (TYPE_FIELDS (t) == 0) + TYPE_FIELDS (t) = last_x; + CLASSTYPE_LOCAL_TYPEDECLS (t) = 1; + } + + if (TYPE_HAS_CONSTRUCTOR (t)) + { + tree vfields = CLASSTYPE_VFIELDS (t); + + while (vfields) + { + /* Mark the fact that constructor for T + could affect anybody inheriting from T + who wants to initialize vtables for VFIELDS's type. */ + if (VF_DERIVED_VALUE (vfields)) + TREE_ADDRESSABLE (vfields) = 1; + vfields = TREE_CHAIN (vfields); + } + if (any_default_members != 0) + build_class_init_list (t); + } + else if (TYPE_NEEDS_CONSTRUCTING (t)) + build_class_init_list (t); + + if (current_lang_name == lang_name_cplusplus) + { + if (! CLASSTYPE_DECLARED_EXCEPTION (t) + && ! IS_SIGNATURE (t)) + embrace_waiting_friends (t); + + /* Write out inline function definitions. */ + do_inline_function_hair (t, CLASSTYPE_INLINE_FRIENDS (t)); + CLASSTYPE_INLINE_FRIENDS (t) = 0; + } + + if (CLASSTYPE_VSIZE (t) != 0) + { + if ((flag_this_is_variable & 1) == 0) + { + tree vtbl_ptr = build_decl (VAR_DECL, get_identifier (VPTR_NAME), + TREE_TYPE (vfield)); + DECL_REGISTER (vtbl_ptr) = 1; + CLASSTYPE_VTBL_PTR (t) = vtbl_ptr; + } + if (DECL_FIELD_CONTEXT (vfield) != t) + { + tree binfo = get_binfo (DECL_FIELD_CONTEXT (vfield), t, 0); + tree offset = BINFO_OFFSET (binfo); + + vfield = copy_node (vfield); + copy_lang_decl (vfield); + + if (! integer_zerop (offset)) + offset = size_binop (MULT_EXPR, offset, size_int (BITS_PER_UNIT)); + DECL_FIELD_CONTEXT (vfield) = t; + DECL_CLASS_CONTEXT (vfield) = t; + DECL_FIELD_BITPOS (vfield) + = size_binop (PLUS_EXPR, offset, DECL_FIELD_BITPOS (vfield)); + CLASSTYPE_VFIELD (t) = vfield; + } + + /* In addition to this one, all the other vfields should be listed. */ + /* Before that can be done, we have to have FIELD_DECLs for them, and + a place to find them. */ + TYPE_NONCOPIED_PARTS (t) = build_tree_list (default_conversion (TYPE_BINFO_VTABLE (t)), vfield); + + if (warn_nonvdtor && TYPE_HAS_DESTRUCTOR (t) + && DECL_VINDEX (TREE_VEC_ELT (method_vec, 0)) == NULL_TREE) + cp_warning ("`%#T' has virtual functions but non-virtual destructor", + t); + } + + /* Make the rtl for any new vtables we have created, and unmark + the base types we marked. */ + unmark_finished_struct (t); + TYPE_BEING_DEFINED (t) = 0; + + if (flag_dossier && CLASSTYPE_VTABLE_NEEDS_WRITING (t)) + { + tree variants; + tree tdecl; + + /* Now instantiate its type descriptors. */ + tdecl = TREE_OPERAND (build_t_desc (t, 1), 0); + variants = TYPE_POINTER_TO (t); + build_type_variant (variants, 1, 0); + while (variants) + { + build_t_desc (variants, 1); + variants = TYPE_NEXT_VARIANT (variants); + } + variants = build_reference_type (t); + build_type_variant (variants, 1, 0); + while (variants) + { + build_t_desc (variants, 1); + variants = TYPE_NEXT_VARIANT (variants); + } +#if 0 + DECL_VPARENT (tdecl) = t; +#endif + DECL_CONTEXT (tdecl) = t; + } + /* Still need to instantiate this C struct's type descriptor. */ + else if (flag_dossier && ! CLASSTYPE_DOSSIER (t)) + build_t_desc (t, 1); + + if (TYPE_NAME (t) && TYPE_IDENTIFIER (t)) + undo_template_name_overload (TYPE_IDENTIFIER (t), 1); + if (current_class_type) + popclass (0); + else + error ("trying to finish struct, but kicked out due to previous parse errors."); + + hack_incomplete_structures (t); + + resume_momentary (old); + + if (flag_cadillac) + cadillac_finish_struct (t); + +#if 0 + /* This has to be done after we have sorted out what to do with + the enclosing type. */ + if (write_symbols != DWARF_DEBUG) + { + /* Be smarter about nested classes here. If a type is nested, + only output it if we would output the enclosing type. */ + if (DECL_CONTEXT (TYPE_NAME (t)) + && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (TYPE_NAME (t)))) == 't') + DECL_IGNORED_P (TYPE_NAME (t)) = TREE_ASM_WRITTEN (TYPE_NAME (t)); + } +#endif + + if (write_symbols != DWARF_DEBUG) + { + /* If the type has methods, we want to think about cutting down + the amount of symbol table stuff we output. The value stored in + the TYPE_DECL's DECL_IGNORED_P slot is a first approximation. + For example, if a member function is seen and we decide to + write out that member function, then we can change the value + of the DECL_IGNORED_P slot, and the type will be output when + that member function's debug info is written out. */ + if (CLASSTYPE_METHOD_VEC (t)) + { + extern tree pending_vtables; + + /* Don't output full info about any type + which does not have its implementation defined here. */ + if (TYPE_VIRTUAL_P (t) && write_virtuals == 2) + DECL_IGNORED_P (TYPE_NAME (t)) + = (value_member (TYPE_IDENTIFIER (t), pending_vtables) == 0); + else if (CLASSTYPE_INTERFACE_ONLY (t)) + DECL_IGNORED_P (TYPE_NAME (t)) = 1; + else if (CLASSTYPE_INTERFACE_UNKNOWN (t)) + /* Only a first approximation! */ + DECL_IGNORED_P (TYPE_NAME (t)) = 1; + } + else if (CLASSTYPE_INTERFACE_ONLY (t)) + DECL_IGNORED_P (TYPE_NAME (t)) = 1; + } + + /* Finish debugging output for this type. */ + rest_of_type_compilation (t, global_bindings_p ()); + + return t; +} + +/* Return non-zero if the effective type of INSTANCE is static. + Used to determine whether the virtual function table is needed + or not. + + *NONNULL is set iff INSTANCE can be known to be nonnull, regardless + of our knowledge of its type. */ +int +resolves_to_fixed_type_p (instance, nonnull) + tree instance; + int *nonnull; +{ + switch (TREE_CODE (instance)) + { + case INDIRECT_REF: + /* Check that we are not going through a cast of some sort. */ + if (TREE_TYPE (instance) + == TREE_TYPE (TREE_TYPE (TREE_OPERAND (instance, 0)))) + instance = TREE_OPERAND (instance, 0); + /* fall through... */ + case CALL_EXPR: + /* This is a call to a constructor, hence it's never zero. */ + if (TREE_HAS_CONSTRUCTOR (instance)) + { + if (nonnull) + *nonnull = 1; + return 1; + } + return 0; + + case SAVE_EXPR: + /* This is a call to a constructor, hence it's never zero. */ + if (TREE_HAS_CONSTRUCTOR (instance)) + { + if (nonnull) + *nonnull = 1; + return 1; + } + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + + case RTL_EXPR: + /* This is a call to `new', hence it's never zero. */ + if (TREE_CALLS_NEW (instance)) + { + if (nonnull) + *nonnull = 1; + return 1; + } + return 0; + + case PLUS_EXPR: + case MINUS_EXPR: + if (TREE_CODE (TREE_OPERAND (instance, 1)) == INTEGER_CST) + /* Propagate nonnull. */ + resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + if (TREE_CODE (TREE_OPERAND (instance, 0)) == ADDR_EXPR) + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + return 0; + + case NOP_EXPR: + case CONVERT_EXPR: + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + + case ADDR_EXPR: + if (nonnull) + *nonnull = 1; + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + + case COMPONENT_REF: + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 1), nonnull); + + case WITH_CLEANUP_EXPR: + if (TREE_CODE (TREE_OPERAND (instance, 0)) == ADDR_EXPR) + return resolves_to_fixed_type_p (TREE_OPERAND (instance, 0), nonnull); + /* fall through... */ + case VAR_DECL: + case FIELD_DECL: + if (TREE_CODE (TREE_TYPE (instance)) == ARRAY_TYPE + && IS_AGGR_TYPE (TREE_TYPE (TREE_TYPE (instance)))) + { + if (nonnull) + *nonnull = 1; + return 1; + } + /* fall through... */ + case TARGET_EXPR: + case PARM_DECL: + if (IS_AGGR_TYPE (TREE_TYPE (instance))) + { + if (nonnull) + *nonnull = 1; + return 1; + } + else if (nonnull) + { + if (instance == current_class_decl + && flag_this_is_variable <= 0) + { + /* Some people still use `this = 0' inside destructors. */ + *nonnull = ! DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (current_function_decl)); + /* In a constructor, we know our type. */ + if (flag_this_is_variable < 0) + return 1; + } + else if (TREE_CODE (TREE_TYPE (instance)) == REFERENCE_TYPE) + /* Reference variables should be references to objects. */ + *nonnull = 1; + } + return 0; + + default: + return 0; + } +} + +void +init_class_processing () +{ + current_class_depth = 0; + current_class_stacksize = 10; + current_class_base = (tree *)xmalloc(current_class_stacksize * sizeof (tree)); + current_class_stack = current_class_base; + + current_lang_stacksize = 10; + current_lang_base = (tree *)xmalloc(current_lang_stacksize * sizeof (tree)); + current_lang_stack = current_lang_base; + + /* Keep these values lying around. */ + the_null_vtable_entry = build_vtable_entry (integer_zero_node, integer_zero_node); + base_layout_decl = build_lang_field_decl (FIELD_DECL, NULL_TREE, error_mark_node); + TREE_TYPE (base_layout_decl) = make_node (RECORD_TYPE); + + gcc_obstack_init (&class_obstack); +} + +/* Set current scope to NAME. CODE tells us if this is a + STRUCT, UNION, or ENUM environment. + + NAME may end up being NULL_TREE if this is an anonymous or + late-bound struct (as in "struct { ... } foo;") */ + +/* Set global variables CURRENT_CLASS_NAME and CURRENT_CLASS_TYPE to + appropriate values, found by looking up the type definition of + NAME (as a CODE). + + If MODIFY is 1, we set IDENTIFIER_CLASS_VALUE's of names + which can be seen locally to the class. They are shadowed by + any subsequent local declaration (including parameter names). + + If MODIFY is 2, we set IDENTIFIER_CLASS_VALUE's of names + which have static meaning (i.e., static members, static + member functions, enum declarations, etc). + + If MODIFY is 3, we set IDENTIFIER_CLASS_VALUE of names + which can be seen locally to the class (as in 1), but + know that we are doing this for declaration purposes + (i.e. friend foo::bar (int)). + + So that we may avoid calls to lookup_name, we cache the _TYPE + nodes of local TYPE_DECLs in the TREE_TYPE field of the name. + + For multiple inheritance, we perform a two-pass depth-first search + of the type lattice. The first pass performs a pre-order search, + marking types after the type has had its fields installed in + the appropriate IDENTIFIER_CLASS_VALUE slot. The second pass merely + unmarks the marked types. If a field or member function name + appears in an ambiguous way, the IDENTIFIER_CLASS_VALUE of + that name becomes `error_mark_node'. */ + +void +pushclass (type, modify) + tree type; + int modify; +{ + push_memoized_context (type, modify); + + current_class_depth++; + *current_class_stack++ = current_class_name; + *current_class_stack++ = current_class_type; + if (current_class_stack >= current_class_base + current_class_stacksize) + { + current_class_base = + (tree *)xrealloc (current_class_base, + sizeof (tree) * (current_class_stacksize + 10)); + current_class_stack = current_class_base + current_class_stacksize; + current_class_stacksize += 10; + } + + current_class_name = TYPE_NAME (type); + if (TREE_CODE (current_class_name) == TYPE_DECL) + current_class_name = DECL_NAME (current_class_name); + current_class_type = type; + + if (previous_class_type != NULL_TREE + && (type != previous_class_type || TYPE_SIZE (previous_class_type) == NULL_TREE) + && current_class_depth == 1) + { + /* Forcibly remove any old class remnants. */ + popclass (-1); + previous_class_type = NULL_TREE; + } + + pushlevel_class (); + + if (modify) + { + tree tags; + tree this_fndecl = current_function_decl; + + if (current_function_decl + && DECL_CONTEXT (current_function_decl) + && TREE_CODE (DECL_CONTEXT (current_function_decl)) == FUNCTION_DECL) + current_function_decl = DECL_CONTEXT (current_function_decl); + else + current_function_decl = NULL_TREE; + + if (TREE_CODE (type) == UNINSTANTIATED_P_TYPE) + { + declare_uninstantiated_type_level (); + overload_template_name (current_class_name, 0); + } + else if (type != previous_class_type || current_class_depth > 1) + { + build_mi_matrix (type); + push_class_decls (type); + free_mi_matrix (); + if (current_class_depth == 1) + previous_class_type = type; + } + else + { + tree item; + + /* Hooray, our cacheing was successful, let's just install the + cached class_shadowed list, and walk through it to get the + IDENTIFIER_TYPE_VALUEs correct. */ + set_class_shadows (previous_class_values); + for (item = previous_class_values; item; item = TREE_CHAIN (item)) + { + tree id = TREE_PURPOSE (item); + tree decl = IDENTIFIER_CLASS_VALUE (id); + + if (TREE_CODE (decl) == TYPE_DECL) + set_identifier_type_value (id, TREE_TYPE (decl)); + } + unuse_fields (type); + } + + for (tags = CLASSTYPE_TAGS (type); tags; tags = TREE_CHAIN (tags)) + { + TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 1; + if (! TREE_PURPOSE (tags)) + continue; + pushtag (TREE_PURPOSE (tags), TREE_VALUE (tags), 0); + } + + current_function_decl = this_fndecl; + } + + if (flag_cadillac) + cadillac_push_class (type); +} + +/* Get out of the current class scope. If we were in a class scope + previously, that is the one popped to. The flag MODIFY tells + whether the current scope declarations needs to be modified + as a result of popping to the previous scope. */ +void +popclass (modify) + int modify; +{ + if (flag_cadillac) + cadillac_pop_class (); + + if (modify < 0) + { + /* Back this old class out completely. */ + tree tags = CLASSTYPE_TAGS (previous_class_type); + tree t; + + /* This code can be seen as a cache miss. When we've cached a + class' scope's bindings and we can't use them, we need to reset + them. This is it! */ + for (t = previous_class_values; t; t = TREE_CHAIN(t)) + IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (t)) = NULL_TREE; + while (tags) + { + TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 0; + tags = TREE_CHAIN (tags); + } + goto ret; + } + + if (modify) + { + /* Just remove from this class what didn't make + it into IDENTIFIER_CLASS_VALUE. */ + tree tags = CLASSTYPE_TAGS (current_class_type); + + while (tags) + { + TREE_NONLOCAL_FLAG (TREE_VALUE (tags)) = 0; + tags = TREE_CHAIN (tags); + } + } + if (TREE_CODE (current_class_type) == UNINSTANTIATED_P_TYPE) + undo_template_name_overload (current_class_name, 0); + + poplevel_class (); + + /* Since poplevel_class does the popping of class decls nowadays, + this really only frees the obstack used for these decls. + That's why it had to be moved down here. */ + if (modify) + pop_class_decls (current_class_type); + + current_class_depth--; + current_class_type = *--current_class_stack; + current_class_name = *--current_class_stack; + + if (current_class_type) + { + if (CLASSTYPE_VTBL_PTR (current_class_type)) + { + current_vtable_decl = lookup_name (DECL_NAME (CLASSTYPE_VTBL_PTR (current_class_type)), 0); + if (current_vtable_decl) + current_vtable_decl = build_indirect_ref (current_vtable_decl, + NULL_PTR); + } + current_class_decl = lookup_name (this_identifier, 0); + if (current_class_decl) + { + if (TREE_CODE (TREE_TYPE (current_class_decl)) == POINTER_TYPE) + { + tree temp; + /* Can't call build_indirect_ref here, because it has special + logic to return C_C_D given this argument. */ + C_C_D = build1 (INDIRECT_REF, current_class_type, current_class_decl); + temp = TREE_TYPE (TREE_TYPE (current_class_decl)); + TREE_READONLY (C_C_D) = TYPE_READONLY (temp); + TREE_SIDE_EFFECTS (C_C_D) = TYPE_VOLATILE (temp); + TREE_THIS_VOLATILE (C_C_D) = TYPE_VOLATILE (temp); + } + else + C_C_D = current_class_decl; + } + else + C_C_D = NULL_TREE; + } + else + { + current_class_decl = NULL_TREE; + current_vtable_decl = NULL_TREE; + C_C_D = NULL_TREE; + } + + pop_memoized_context (modify); + + ret: + ; +} + +/* When entering a class scope, all enclosing class scopes' names with + static meaning (static variables, static functions, types and enumerators) + have to be visible. This recursive function calls pushclass for all + enclosing class contexts until global or a local scope is reached. + TYPE is the enclosed class and MODIFY is equivalent with the pushclass + formal of the same name. */ + +void +push_nested_class (type, modify) + tree type; + int modify; +{ + tree context = DECL_CONTEXT (TYPE_NAME (type)); + + if (context && TREE_CODE (context) == RECORD_TYPE) + push_nested_class (context, 2); + pushclass (type, modify); +} + +/* Undoes a push_nested_class call. MODIFY is passed on to popclass. */ + +void +pop_nested_class (modify) + int modify; +{ + tree context = DECL_CONTEXT (TYPE_NAME (current_class_type)); + + popclass (modify); + if (context && TREE_CODE (context) == RECORD_TYPE) + pop_nested_class (modify); +} + +/* Set global variables CURRENT_LANG_NAME to appropriate value + so that behavior of name-mangling machinery is correct. */ + +void +push_lang_context (name) + tree name; +{ + *current_lang_stack++ = current_lang_name; + if (current_lang_stack >= current_lang_base + current_lang_stacksize) + { + current_lang_base = + (tree *)xrealloc (current_lang_base, + sizeof (tree) * (current_lang_stacksize + 10)); + current_lang_stack = current_lang_base + current_lang_stacksize; + current_lang_stacksize += 10; + } + + if (name == lang_name_cplusplus) + { + strict_prototype = strict_prototypes_lang_cplusplus; + current_lang_name = name; + } + else if (name == lang_name_c) + { + strict_prototype = strict_prototypes_lang_c; + current_lang_name = name; + } + else + error ("language string `\"%s\"' not recognized", IDENTIFIER_POINTER (name)); + + if (flag_cadillac) + cadillac_push_lang (name); +} + +/* Get out of the current language scope. */ +void +pop_lang_context () +{ + if (flag_cadillac) + cadillac_pop_lang (); + + current_lang_name = *--current_lang_stack; + if (current_lang_name == lang_name_cplusplus) + strict_prototype = strict_prototypes_lang_cplusplus; + else if (current_lang_name == lang_name_c) + strict_prototype = strict_prototypes_lang_c; +} + +int +root_lang_context_p () +{ + return current_lang_stack == current_lang_base; +} + +/* Type instantiation routines. */ + +/* This function will instantiate the type of the expression given + in RHS to match the type of LHSTYPE. If LHSTYPE is NULL_TREE, + or other errors exist, the TREE_TYPE of RHS will be ERROR_MARK_NODE. + + This function is used in build_modify_expr, convert_arguments, + build_c_cast, and compute_conversion_costs. */ +tree +instantiate_type (lhstype, rhs, complain) + tree lhstype, rhs; + int complain; +{ + if (TREE_CODE (lhstype) == UNKNOWN_TYPE) + { + if (complain) + error ("not enough type information"); + return error_mark_node; + } + + if (TREE_TYPE (rhs) != NULL_TREE && ! (type_unknown_p (rhs))) + return rhs; + + /* This should really only be used when attempting to distinguish + what sort of a pointer to function we have. For now, any + arithmetic operation which is not supported on pointers + is rejected as an error. */ + + switch (TREE_CODE (rhs)) + { + case TYPE_EXPR: + case CONVERT_EXPR: + case SAVE_EXPR: + case CONSTRUCTOR: + case BUFFER_REF: + my_friendly_abort (177); + return error_mark_node; + + case INDIRECT_REF: + case ARRAY_REF: + TREE_TYPE (rhs) = lhstype; + lhstype = build_pointer_type (lhstype); + TREE_OPERAND (rhs, 0) + = instantiate_type (lhstype, TREE_OPERAND (rhs, 0), complain); + if (TREE_OPERAND (rhs, 0) == error_mark_node) + return error_mark_node; + + return rhs; + + case NOP_EXPR: + rhs = copy_node (TREE_OPERAND (rhs, 0)); + TREE_TYPE (rhs) = unknown_type_node; + return instantiate_type (lhstype, rhs, complain); + + case COMPONENT_REF: + { + tree field = TREE_OPERAND (rhs, 1); + if (TREE_CODE (field) == TREE_LIST) + { + tree function = instantiate_type (lhstype, field, complain); + if (function == error_mark_node) + return error_mark_node; + my_friendly_assert (TREE_CODE (function) == FUNCTION_DECL, 185); + if (DECL_VINDEX (function)) + { + tree base = TREE_OPERAND (rhs, 0); + tree base_ptr = build_unary_op (ADDR_EXPR, base, 0); + if (base_ptr == error_mark_node) + return error_mark_node; + base_ptr = convert_pointer_to (DECL_CONTEXT (function), base_ptr); + if (base_ptr == error_mark_node) + return error_mark_node; + return build_vfn_ref (&base_ptr, base, DECL_VINDEX (function)); + } + return function; + } + + my_friendly_assert (TREE_CODE (field) == FIELD_DECL, 178); + my_friendly_assert (!(TREE_CODE (TREE_TYPE (field)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (field)) == METHOD_TYPE), + 179); + + TREE_TYPE (rhs) = lhstype; + /* First look for an exact match */ + + while (field && TREE_TYPE (field) != lhstype) + field = TREE_CHAIN (field); + if (field) + { + TREE_OPERAND (rhs, 1) = field; + return rhs; + } + + /* No exact match found, look for a compatible function. */ + field = TREE_OPERAND (rhs, 1); + while (field && ! comptypes (lhstype, TREE_TYPE (field), 0)) + field = TREE_CHAIN (field); + if (field) + { + TREE_OPERAND (rhs, 1) = field; + field = TREE_CHAIN (field); + while (field && ! comptypes (lhstype, TREE_TYPE (field), 0)) + field = TREE_CHAIN (field); + if (field) + { + if (complain) + error ("ambiguous overload for COMPONENT_REF requested"); + return error_mark_node; + } + } + else + { + if (complain) + error ("no appropriate overload exists for COMPONENT_REF"); + return error_mark_node; + } + return rhs; + } + + case TREE_LIST: + { + tree elem, baselink, name; + int globals = overloaded_globals_p (rhs); + +#if 0 /* obsolete */ + /* If there's only one function we know about, return that. */ + if (globals > 0 && TREE_CHAIN (rhs) == NULL_TREE) + return TREE_VALUE (rhs); +#endif + + /* First look for an exact match. Search either overloaded + functions or member functions. May have to undo what + `default_conversion' might do to lhstype. */ + + if (TREE_CODE (lhstype) == POINTER_TYPE) + if (TREE_CODE (TREE_TYPE (lhstype)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (lhstype)) == METHOD_TYPE) + lhstype = TREE_TYPE (lhstype); + else + { + if (complain) + error ("invalid type combination for overload"); + return error_mark_node; + } + + if (TREE_CODE (lhstype) != FUNCTION_TYPE && globals > 0) + { + if (complain) + cp_error ("cannot resolve overloaded function `%D' based on non-function type", + TREE_PURPOSE (rhs)); + return error_mark_node; + } + + if (globals > 0) + { + elem = get_first_fn (rhs); + while (elem) + if (TREE_TYPE (elem) != lhstype) + elem = DECL_CHAIN (elem); + else + return elem; + /* No exact match found, look for a compatible function. */ + elem = get_first_fn (rhs); + while (elem && ! comp_target_types (lhstype, TREE_TYPE (elem), 1)) + elem = DECL_CHAIN (elem); + if (elem) + { + tree save_elem = elem; + elem = DECL_CHAIN (elem); + while (elem && ! comp_target_types (lhstype, TREE_TYPE (elem), + 0)) + elem = DECL_CHAIN (elem); + if (elem) + { + if (complain) + { + cp_error ("cannot resolve overload to target type `%#T';", lhstype); + cp_error_at ("ambiguity between `%#D'", save_elem); + cp_error_at ("and `%#D', at least", elem); + } + return error_mark_node; + } + if (TREE_CODE (save_elem) == TEMPLATE_DECL) + { + int ntparms = TREE_VEC_LENGTH + (DECL_TEMPLATE_PARMS (save_elem)); + tree *targs = (tree *) alloca (sizeof (tree) * ntparms); + int i, dummy; + i = type_unification + (DECL_TEMPLATE_PARMS (save_elem), targs, + TYPE_ARG_TYPES (TREE_TYPE (save_elem)), + TYPE_ARG_TYPES (lhstype), &dummy, 0); + save_elem = instantiate_template (save_elem, targs); + } + return save_elem; + } + if (complain) + { + cp_error ("cannot resolve overload to target type `%#T';", + lhstype); + cp_error ("no suitable overload of function `%D' exists", + TREE_PURPOSE (rhs)); + } + return error_mark_node; + } + + if (TREE_NONLOCAL_FLAG (rhs)) + { + /* Got to get it as a baselink. */ + rhs = lookup_fnfields (TYPE_BINFO (current_class_type), + TREE_PURPOSE (rhs), 0); + } + else + { + my_friendly_assert (TREE_CHAIN (rhs) == NULL_TREE, 181); + if (TREE_CODE (TREE_VALUE (rhs)) == TREE_LIST) + rhs = TREE_VALUE (rhs); + my_friendly_assert (TREE_CODE (TREE_VALUE (rhs)) == FUNCTION_DECL, + 182); + } + + for (baselink = rhs; baselink; + baselink = next_baselink (baselink)) + { + elem = TREE_VALUE (baselink); + while (elem) + if (TREE_TYPE (elem) != lhstype) + elem = TREE_CHAIN (elem); + else + return elem; + } + + /* No exact match found, look for a compatible method. */ + for (baselink = rhs; baselink; + baselink = next_baselink (baselink)) + { + elem = TREE_VALUE (baselink); + while (elem && ! comp_target_types (lhstype, TREE_TYPE (elem), 1)) + elem = TREE_CHAIN (elem); + if (elem) + { + tree save_elem = elem; + elem = TREE_CHAIN (elem); + while (elem && ! comp_target_types (lhstype, TREE_TYPE (elem), 0)) + elem = TREE_CHAIN (elem); + if (elem) + { + if (complain) + error ("ambiguous overload for overloaded method requested"); + return error_mark_node; + } + return save_elem; + } + name = DECL_NAME (TREE_VALUE (rhs)); + if (TREE_CODE (lhstype) == FUNCTION_TYPE && globals < 0) + { + /* Try to instantiate from non-member functions. */ + rhs = IDENTIFIER_GLOBAL_VALUE (name); + if (rhs && TREE_CODE (rhs) == TREE_LIST) + { + /* This code seems to be missing a `return'. */ + my_friendly_abort (4); + instantiate_type (lhstype, rhs, complain); + } + } + } + if (complain) + error ("no static member functions named `%s'", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + + case CALL_EXPR: + /* This is too hard for now. */ + my_friendly_abort (183); + return error_mark_node; + + case PLUS_EXPR: + case MINUS_EXPR: + case COMPOUND_EXPR: + TREE_OPERAND (rhs, 0) = instantiate_type (lhstype, TREE_OPERAND (rhs, 0), complain); + if (TREE_OPERAND (rhs, 0) == error_mark_node) + return error_mark_node; + TREE_OPERAND (rhs, 1) = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); + if (TREE_OPERAND (rhs, 1) == error_mark_node) + return error_mark_node; + + TREE_TYPE (rhs) = lhstype; + return rhs; + + case MULT_EXPR: + case TRUNC_DIV_EXPR: + case FLOOR_DIV_EXPR: + case CEIL_DIV_EXPR: + case ROUND_DIV_EXPR: + case RDIV_EXPR: + case TRUNC_MOD_EXPR: + case FLOOR_MOD_EXPR: + case CEIL_MOD_EXPR: + case ROUND_MOD_EXPR: + case FIX_ROUND_EXPR: + case FIX_FLOOR_EXPR: + case FIX_CEIL_EXPR: + case FIX_TRUNC_EXPR: + case FLOAT_EXPR: + case NEGATE_EXPR: + case ABS_EXPR: + case MAX_EXPR: + case MIN_EXPR: + case FFS_EXPR: + + case BIT_AND_EXPR: + case BIT_IOR_EXPR: + case BIT_XOR_EXPR: + case LSHIFT_EXPR: + case RSHIFT_EXPR: + case LROTATE_EXPR: + case RROTATE_EXPR: + + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + if (complain) + error ("illegal operation on uninstantiated type"); + return error_mark_node; + + case TRUTH_AND_EXPR: + case TRUTH_OR_EXPR: + case TRUTH_XOR_EXPR: + case LT_EXPR: + case LE_EXPR: + case GT_EXPR: + case GE_EXPR: + case EQ_EXPR: + case NE_EXPR: + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: + case TRUTH_NOT_EXPR: + if (complain) + error ("not enough type information"); + return error_mark_node; + + case COND_EXPR: + if (type_unknown_p (TREE_OPERAND (rhs, 0))) + { + if (complain) + error ("not enough type information"); + return error_mark_node; + } + TREE_OPERAND (rhs, 1) = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); + if (TREE_OPERAND (rhs, 1) == error_mark_node) + return error_mark_node; + TREE_OPERAND (rhs, 2) = instantiate_type (lhstype, TREE_OPERAND (rhs, 2), complain); + if (TREE_OPERAND (rhs, 2) == error_mark_node) + return error_mark_node; + + TREE_TYPE (rhs) = lhstype; + return rhs; + + case MODIFY_EXPR: + TREE_OPERAND (rhs, 1) = instantiate_type (lhstype, TREE_OPERAND (rhs, 1), complain); + if (TREE_OPERAND (rhs, 1) == error_mark_node) + return error_mark_node; + + TREE_TYPE (rhs) = lhstype; + return rhs; + + case ADDR_EXPR: + if (TREE_CODE (lhstype) != POINTER_TYPE) + { + if (complain) + error ("type for resolving address of overloaded function must be pointer type"); + return error_mark_node; + } + TREE_TYPE (rhs) = lhstype; + lhstype = TREE_TYPE (lhstype); + TREE_OPERAND (rhs, 0) = instantiate_type (lhstype, TREE_OPERAND (rhs, 0), complain); + if (TREE_OPERAND (rhs, 0) == error_mark_node) + return error_mark_node; + + mark_addressable (TREE_OPERAND (rhs, 0)); + return rhs; + + case ENTRY_VALUE_EXPR: + my_friendly_abort (184); + return error_mark_node; + + case ERROR_MARK: + return error_mark_node; + + default: + my_friendly_abort (185); + return error_mark_node; + } +} + +/* Return the name of the virtual function pointer field + (as an IDENTIFIER_NODE) for the given TYPE. Note that + this may have to look back through base types to find the + ultimate field name. (For single inheritance, these could + all be the same name. Who knows for multiple inheritance). */ +static tree +get_vfield_name (type) + tree type; +{ + tree binfo = TYPE_BINFO (type); + char *buf; + + while (BINFO_BASETYPES (binfo) + && TYPE_VIRTUAL_P (BINFO_TYPE (BINFO_BASETYPE (binfo, 0))) + && ! TREE_VIA_VIRTUAL (BINFO_BASETYPE (binfo, 0))) + binfo = BINFO_BASETYPE (binfo, 0); + + type = BINFO_TYPE (binfo); + buf = (char *)alloca (sizeof (VFIELD_NAME_FORMAT) + + TYPE_NAME_LENGTH (type) + 2); + sprintf (buf, VFIELD_NAME_FORMAT, TYPE_NAME_STRING (type)); + return get_identifier (buf); +} + +void +print_class_statistics () +{ +#ifdef GATHER_STATISTICS + fprintf (stderr, "convert_harshness = %d\n", n_convert_harshness); + fprintf (stderr, "compute_conversion_costs = %d\n", n_compute_conversion_costs); + fprintf (stderr, "build_method_call = %d (inner = %d)\n", + n_build_method_call, n_inner_fields_searched); + if (n_vtables) + { + fprintf (stderr, "vtables = %d; vtable searches = %d\n", + n_vtables, n_vtable_searches); + fprintf (stderr, "vtable entries = %d; vtable elems = %d\n", + n_vtable_entries, n_vtable_elems); + } +#endif +} + +/* Push an obstack which is sufficiently long-lived to hold such class + decls that may be cached in the previous_class_values list. For now, let's + use the permanent obstack, later we may create a dedicated obstack just + for this purpose. The effect is undone by pop_obstacks. */ +void +maybe_push_cache_obstack () +{ + push_obstacks_nochange (); + if (current_class_depth == 1) + current_obstack = &permanent_obstack; +} diff --git a/gcc/cp/class.h b/gcc/cp/class.h new file mode 100644 index 0000000..fb25a5f --- /dev/null +++ b/gcc/cp/class.h @@ -0,0 +1,161 @@ +/* Variables and structures for overloading rules. + Copyright (C) 1993 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* The following structure is used when comparing various alternatives + for overloading. The unsigned quantity `strikes.i' is used + for fast comparison of two possibilities. This number is an + aggregate of four constituents: + + EVIL: if this is non-zero, then the candidate should not be considered + ELLIPSIS: if this is non-zero, then some actual argument has been matched + against an ellipsis + USER: if this is non-zero, then a user-defined type conversion is needed + B_OR_D: if this is non-zero, then use a base pointer instead of the + type of the pointer we started with. + EASY: if this is non-zero, then we have a builtin conversion + (such as int to long, int to float, etc) to do. + + If two candidates require user-defined type conversions, and the + type conversions are not identical, then an ambiguity error + is reported. + + If two candidates agree on user-defined type conversions, + and one uses pointers of strictly higher type (derived where + another uses base), then that alternative is silently chosen. + + If two candidates have a non-monotonic derived/base pointer + relationship, and/or a non-monotonic easy conversion relationship, + then a warning is emitted to show which paths are possible, and + which one is being chosen. + + For example: + + int i; + double x; + + overload f; + int f (int, int); + double f (double, double); + + f (i, x); // draws a warning + + struct B + { + f (int); + } *bb; + struct D : B + { + f (double); + } *dd; + + dd->f (x); // exact match + dd->f (i); // draws warning + + Note that this technique really only works for 255 arguments. Perhaps + this is not enough. */ + +/* These macros and harshness_code are used by the NEW METHOD. */ +#define EVIL_CODE (1<<7) +#define CONST_CODE (1<<6) +#define ELLIPSIS_CODE (1<<5) +#define USER_CODE (1<<4) +#define STD_CODE (1<<3) +#define PROMO_CODE (1<<2) +#define QUAL_CODE (1<<1) +#define TRIVIAL_CODE (1<<0) + +struct harshness_code +{ + /* What kind of conversion is involved. */ + unsigned short code; + + /* The inheritance distance. */ + short distance; + + /* For a PROMO_CODE, Any special penalties involved in integral conversions. + This exists because $4.1 of the ARM states that something like + `short unsigned int' should promote to `int', not `unsigned int'. + If, for example, it tries to match two fns, f(int) and f(unsigned), + f(int) should be a better match than f(unsigned) by this rule. Without + this extra metric, they both only appear as "integral promotions", which + will lead to an ambiguity. + For a TRIVIAL_CODE, This is also used by build_overload_call_real and + convert_harshness to keep track of other information we need. */ + unsigned short int_penalty; +}; + +struct candidate +{ + /* OLD METHOD */ + unsigned char evil; /* !0 if this will never convert. */ + unsigned char ellipsis; /* !0 if a match against an ellipsis occurred */ + unsigned char user; /* !0 if at least one user-defined type conv. */ + unsigned short b_or_d; /* count number of derived->base or + base->derived conv. */ + unsigned short easy; /* count number of builtin type conv. */ + + /* NEW METHOD */ + struct harshness_code h; /* Used for single-argument conversions. */ + + int h_len; /* The length of the harshness vector. */ + + /* Both methods. */ + tree function; /* A FUNCTION_DECL */ + tree basetypes; /* The path to function. */ + tree arg; /* first parm to function. */ + + /* This union is only here while we maintain both the old and new + argument matching schemes. When it goes away, all v.ansi_harshness + references will be just `harshness'. */ + union + { + /* Indexed by argument number, encodes evil, user, d_to_b, and easy + strikes for that argument. At end of array, we store the index+1 + of where we started using default parameters, or 0 if there are + none. */ + struct harshness_code *ansi_harshness; /* NEW METHOD */ + unsigned short *old_harshness; /* OLD METHOD */ + } v; + + union + { + tree field; /* If no evil strikes, the FUNCTION_DECL of + the function (if a member function). */ + int bad_arg; /* the index of the first bad argument: + 0 if no bad arguments + > 0 is first bad argument + -1 if extra actual arguments + -2 if too few actual arguments. + -3 if const/non const method mismatch. + -4 if type unification failed. + -5 if contravariance violation. */ + } u; +}; +int rank_for_overload (); + +/* Variables shared between cp-class.c and cp-call.c. */ + +extern int n_vtables; +extern int n_vtable_entries; +extern int n_vtable_searches; +extern int n_vtable_elems; +extern int n_convert_harshness; +extern int n_compute_conversion_costs; +extern int n_build_method_call; +extern int n_inner_fields_searched; diff --git a/gcc/cp/cp-tree.def b/gcc/cp/cp-tree.def new file mode 100644 index 0000000..dc4bbda --- /dev/null +++ b/gcc/cp/cp-tree.def @@ -0,0 +1,92 @@ +/* This file contains the definitions and documentation for the + additional tree codes used in the GNU C++ compiler (see tree.def + for the standard codes). + Copyright (C) 1987, 1988, 1990, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* Reference to the contents of an offset + (a value whose type is an OFFSET_TYPE). + Operand 0 is the object within which the offset is taken. + Operand 1 is the offset. The language independent OFFSET_REF + just won't work for us. */ +DEFTREECODE (CP_OFFSET_REF, "cp_offset_ref", "r", 2) + +/* For DELETE_EXPR, operand 0 is the store to be destroyed. + Operand 1 is the value to pass to the destroying function + saying whether the store should be deallocated as well. */ +DEFTREECODE (DELETE_EXPR, "dl_expr", "e", 2) + +/* Value is reference to particular overloaded class method. + Operand 0 is the class name (an IDENTIFIER_NODE); + operand 1 is the field (also an IDENTIFIER_NODE). + The COMPLEXITY field holds the class level (usually 0). */ +DEFTREECODE (SCOPE_REF, "scope_ref", "r", 2) + +/* When composing an object with a member, this is the result. + Operand 0 is the object. Operand 1 is the member (usually + a dereferenced pointer to member). */ +DEFTREECODE (MEMBER_REF, "member_ref", "r", 2) + +/* Type conversion operator in C++. TREE_TYPE is type that this + operator converts to. Operand is expression to be converted. */ +DEFTREECODE (TYPE_EXPR, "type_expr", "e", 1) + +/* For CPLUS_NEW_EXPR, operand 0 is function which performs initialization, + operand 1 is argument list to initialization function, + and operand 2 is the slot which was allocated for this expression. */ +DEFTREECODE (NEW_EXPR, "nw_expr", "e", 3) + +/* Distinguish variables that are only used to identify exceptions + that were caught. Only the DECL_NAME (and TREE_CHAIN) + is really used. */ +DEFTREECODE (CPLUS_CATCH_DECL, "catch_decl", "d", 0) + +/* Template definition. The following fields have the specified uses, + although there are other macros in cp-tree.h that should be used for + accessing this data. + DECL_ARGUMENTS template parm vector + DECL_TEMPLATE_INFO template text &c + DECL_VINDEX list of instantiations already produced; + only done for functions so far + For class template: + DECL_INITIAL associated templates (methods &c) + DECL_RESULT null + For non-class templates: + TREE_TYPE type of object to be constructed + DECL_RESULT decl for object to be created + (e.g., FUNCTION_DECL with tmpl parms used) + */ +DEFTREECODE (TEMPLATE_DECL, "template_decl", "d", 0) + +/* Index into a template parameter list. This parameter must be a type. + Use TYPE_FIELDS to find parmlist and index. */ +DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", "t", 0) + +/* Index into a template parameter list. This parameter must not be a + type. */ +DEFTREECODE (TEMPLATE_CONST_PARM, "template_const_parm", "c", 2) + +/* For uninstantiated parameterized types. + TYPE_VALUES tree list: + TREE_PURPOSE template decl + TREE_VALUE parm vector + TREE_CHAIN null + Other useful fields to be defined later. */ +DEFTREECODE (UNINSTANTIATED_P_TYPE, "uninstantiated_p_type", "t", 0) diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h new file mode 100644 index 0000000..b431e16 --- /dev/null +++ b/gcc/cp/cp-tree.h @@ -0,0 +1,2228 @@ +/* Definitions for C++ parsing and type checking. + Copyright (C) 1987, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifndef _CP_TREE_H +#define _CP_TREE_H + +/* Borrow everything that is C from c-tree.h, + but do so by copy, not by inclusion, since c-tree.h defines + lang_identifier. */ + +#ifndef STDIO_PROTO +#ifdef BUFSIZ +#define STDIO_PROTO(ARGS) PROTO(ARGS) +#else +#define STDIO_PROTO(ARGS) () +#endif +#endif + +/* Language-dependent contents of an identifier. */ + +struct lang_identifier +{ + struct tree_identifier ignore; + tree global_value, local_value; + tree class_value; + tree class_template_info; + struct lang_id2 *x; +}; + +struct lang_id2 +{ + tree label_value, implicit_decl; + tree type_desc, as_list, error_locus; +}; + +/* To identify to the debug emitters if it should pay attention to the + flag `-Wtemplate-debugging'. */ +#define HAVE_TEMPLATES 1 + +/* Macros for access to language-specific slots in an identifier. */ + +#define IDENTIFIER_GLOBAL_VALUE(NODE) \ + (((struct lang_identifier *)(NODE))->global_value) +#define IDENTIFIER_CLASS_VALUE(NODE) \ + (((struct lang_identifier *)(NODE))->class_value) +#define IDENTIFIER_LOCAL_VALUE(NODE) \ + (((struct lang_identifier *)(NODE))->local_value) +#define IDENTIFIER_TEMPLATE(NODE) \ + (((struct lang_identifier *)(NODE))->class_template_info) + +#define IDENTIFIER_TYPE_VALUE(NODE) (TREE_TYPE (NODE)) +#define SET_IDENTIFIER_TYPE_VALUE(NODE,TYPE) (TREE_TYPE (NODE) = TYPE) +#define IDENTIFIER_HAS_TYPE_VALUE(NODE) (TREE_TYPE (NODE) ? 1 : 0) +#define IDENTIFIER_HAS_CLASS_TYPE_VALUE(NODE) \ + (IDENTIFIER_CLASS_VALUE (NODE) && TREE_TYPE (IDENTIFIER_CLASS_VALUE (NODE))) +#define IDENTIFIER_CLASS_TYPE_VALUE(NODE) \ + TREE_TYPE (IDENTIFIER_CLASS_VALUE (NODE)) + +#define LANG_ID_FIELD(NAME,NODE) \ + (((struct lang_identifier *)(NODE))->x \ + ? ((struct lang_identifier *)(NODE))->x->NAME : 0) +#define SET_LANG_ID(NODE,VALUE,NAME) \ + (((struct lang_identifier *)(NODE))->x == 0 \ + ? ((struct lang_identifier *)(NODE))->x \ + = (struct lang_id2 *)perm_calloc (1, sizeof (struct lang_id2)) : 0, \ + ((struct lang_identifier *)(NODE))->x->NAME = (VALUE)) + +#define IDENTIFIER_LABEL_VALUE(NODE) LANG_ID_FIELD(label_value, NODE) +#define SET_IDENTIFIER_LABEL_VALUE(NODE,VALUE) \ + SET_LANG_ID(NODE, VALUE, label_value) + +#define IDENTIFIER_IMPLICIT_DECL(NODE) LANG_ID_FIELD(implicit_decl, NODE) +#define SET_IDENTIFIER_IMPLICIT_DECL(NODE,VALUE) \ + SET_LANG_ID(NODE, VALUE, implicit_decl) + +#define IDENTIFIER_AS_DESC(NODE) LANG_ID_FIELD(type_desc, NODE) +#define SET_IDENTIFIER_AS_DESC(NODE,DESC) \ + SET_LANG_ID(NODE, DESC, type_desc) + +#define IDENTIFIER_AS_LIST(NODE) LANG_ID_FIELD(as_list, NODE) +#define SET_IDENTIFIER_AS_LIST(NODE,LIST) \ + SET_LANG_ID(NODE, LIST, as_list) + +#define IDENTIFIER_ERROR_LOCUS(NODE) LANG_ID_FIELD(error_locus, NODE) +#define SET_IDENTIFIER_ERROR_LOCUS(NODE,VALUE) \ + SET_LANG_ID(NODE, VALUE, error_locus) + + +#define IDENTIFIER_VIRTUAL_P(NODE) TREE_LANG_FLAG_1(NODE) + +/* Nonzero if this identifier is the prefix for a mangled C++ operator name. */ +#define IDENTIFIER_OPNAME_P(NODE) TREE_LANG_FLAG_2(NODE) + +#define IDENTIFIER_TYPENAME_P(NODE) \ + (! strncmp (IDENTIFIER_POINTER (NODE), \ + IDENTIFIER_POINTER (ansi_opname[(int) TYPE_EXPR]), \ + IDENTIFIER_LENGTH (ansi_opname[(int) TYPE_EXPR]))) + +/* Nonzero means reject anything that ANSI standard C forbids. */ +extern int pedantic; + +/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ +#define C_TYPE_FIELDS_READONLY(type) TYPE_LANG_FLAG_0 (type) + +/* If non-zero, a VAR_DECL whose cleanup will cause a throw to the + next exception handler. */ +extern tree exception_throw_decl; + +extern tree double_type_node, long_double_type_node, float_type_node; +extern tree char_type_node, unsigned_char_type_node, signed_char_type_node; +extern tree ptrdiff_type_node; + +extern tree short_integer_type_node, short_unsigned_type_node; +extern tree long_integer_type_node, long_unsigned_type_node; +extern tree long_long_integer_type_node, long_long_unsigned_type_node; +extern tree unsigned_type_node; +extern tree string_type_node, char_array_type_node, int_array_type_node; +extern tree wchar_array_type_node; +extern tree wchar_type_node, signed_wchar_type_node, unsigned_wchar_type_node; +extern tree intQI_type_node, unsigned_intQI_type_node; +extern tree intHI_type_node, unsigned_intHI_type_node; +extern tree intSI_type_node, unsigned_intSI_type_node; +extern tree intDI_type_node, unsigned_intDI_type_node; + +extern int current_function_returns_value; +extern int current_function_returns_null; +extern tree current_function_return_value; + +extern tree ridpointers[]; +extern tree ansi_opname[]; +extern tree ansi_assopname[]; + +/* Nonzero means `$' can be in an identifier. */ + +extern int dollars_in_ident; + +/* Nonzero means allow type mismatches in conditional expressions; + just make their values `void'. */ + +extern int flag_cond_mismatch; + +/* Nonzero means don't recognize the keyword `asm'. */ + +extern int flag_no_asm; + +/* For cross referencing. */ + +extern int flag_gnu_xref; + +/* For environments where you can use GNU binutils (as, ld in particular). */ + +extern int flag_gnu_binutils; + +/* Nonzero means ignore `#ident' directives. */ + +extern int flag_no_ident; + +/* Nonzero means warn about implicit declarations. */ + +extern int warn_implicit; + +/* Nonzero means warn when all ctors or dtors are private, and the class + has no friends. */ + +extern int warn_ctor_dtor_privacy; + +/* Nonzero means warn about function definitions that default the return type + or that use a null return and have a return-type other than void. */ + +extern int warn_return_type; + +/* Nonzero means give string constants the type `const char *' + to get extra warnings from them. These warnings will be too numerous + to be useful, except in thoroughly ANSIfied programs. */ + +extern int warn_write_strings; + +/* Nonzero means warn about sizeof(function) or addition/subtraction + of function pointers. */ + +extern int warn_pointer_arith; + +/* Nonzero means warn for all old-style non-prototype function decls. */ + +extern int warn_strict_prototypes; + +/* Nonzero means warn about suggesting putting in ()'s. */ + +extern int warn_parentheses; + +/* Nonzero means warn about multiple (redundant) decls for the same single + variable or function. */ + +extern int warn_redundant_decls; + +/* Warn if initializer is not completely bracketed. */ + +extern int warn_missing_braces; + +/* Warn about a subscript that has type char. */ + +extern int warn_char_subscripts; + +/* Nonzero means warn about pointer casts that can drop a type qualifier + from the pointer target type. */ + +extern int warn_cast_qual; + +/* Warn about traditional constructs whose meanings changed in ANSI C. */ + +extern int warn_traditional; + +/* Warn about *printf or *scanf format/argument anomalies. */ + +extern int warn_format; + +/* Nonzero means warn about non virtual destructors in classes that have + virtual functions. */ + +extern int warn_nonvdtor; + +/* Non-zero means warn when a function is declared extern and later inline. */ +extern int warn_extern_inline; + +/* Nonzero means do some things the same way PCC does. */ + +extern int flag_traditional; + +/* Nonzero means to treat bitfields as unsigned unless they say `signed'. */ + +extern int flag_signed_bitfields; + +/* 3 means write out only virtuals function tables `defined' + in this implementation file. + 2 means write out only specific virtual function tables + and give them (C) public access. + 1 means write out virtual function tables and give them + (C) public access. + 0 means write out virtual function tables and give them + (C) static access (default). + -1 means declare virtual function tables extern. */ + +extern int write_virtuals; + +/* INTERFACE_ONLY nonzero means that we are in an "interface" + section of the compiler. INTERFACE_UNKNOWN nonzero means + we cannot trust the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN + is zero and INTERFACE_ONLY is zero, it means that we are responsible + for exporting definitions that others might need. */ +extern int interface_only, interface_unknown; + +/* Nonzero means we should attempt to elide constructors when possible. */ + +extern int flag_elide_constructors; + +/* Nonzero means recognize and handle exception handling constructs. */ + +extern int flag_handle_exceptions; + +/* Nonzero means recognize and handle ansi-style exception handling constructs. */ + +extern int flag_ansi_exceptions; + +/* Nonzero means do argument matching for overloading according to the + ANSI rules, rather than what g++ used to believe to be correct. */ + +extern int flag_ansi_overloading; + +/* Nonzero means recognize and handle signature language constructs. */ + +extern int flag_handle_signatures; + +/* Nonzero means that member functions defined in class scope are + inline by default. */ + +extern int flag_default_inline; + +/* Nonzero means emit cadillac protocol. */ + +extern int flag_cadillac; + +/* C++ language-specific tree codes. */ +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM, +enum cplus_tree_code { + __DUMMY = LAST_AND_UNUSED_TREE_CODE, +#include "tree.def" + LAST_CPLUS_TREE_CODE +}; +#undef DEFTREECODE + +/* Override OFFSET_REFs from the back-end, as we want our very own. */ +/* Allow complex pointer to members to work correctly. */ +#define OFFSET_REF CP_OFFSET_REF + +enum languages { lang_c, lang_cplusplus }; + +/* Macros to make error reporting functions' lives easier. */ +#define TYPE_IDENTIFIER(NODE) (DECL_NAME (TYPE_NAME (NODE))) +#define TYPE_NAME_STRING(NODE) (IDENTIFIER_POINTER (TYPE_IDENTIFIER (NODE))) +#define TYPE_NAME_LENGTH(NODE) (IDENTIFIER_LENGTH (TYPE_IDENTIFIER (NODE))) + +#define TYPE_ASSEMBLER_NAME_STRING(NODE) (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (TYPE_NAME (NODE)))) +#define TYPE_ASSEMBLER_NAME_LENGTH(NODE) (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (TYPE_NAME (NODE)))) + +#define IS_AGGR_TYPE(t) (TYPE_LANG_FLAG_5 (t)) +#define IS_AGGR_TYPE_CODE(t) (t == RECORD_TYPE || t == UNION_TYPE) +#define IS_AGGR_TYPE_2(TYPE1,TYPE2) \ + (TREE_CODE (TYPE1) == TREE_CODE (TYPE2) \ + && IS_AGGR_TYPE (TYPE1)&IS_AGGR_TYPE (TYPE2)) + +/* In a *_TYPE, nonzero means a built-in type. */ +#define TYPE_BUILT_IN(NODE) TYPE_LANG_FLAG_6(NODE) + +/* Macros which might want to be replaced by function calls. */ + +#if 1 +/* Virtual function addresses can be gotten from a virtual function + table entry using this macro. */ +#define FNADDR_FROM_VTABLE_ENTRY(ENTRY) \ + TREE_VALUE (TREE_CHAIN (TREE_CHAIN (CONSTRUCTOR_ELTS (ENTRY)))) +#define SET_FNADDR_FROM_VTABLE_ENTRY(ENTRY,VALUE) \ + (TREE_VALUE (TREE_CHAIN (TREE_CHAIN (CONSTRUCTOR_ELTS (ENTRY)))) = (VALUE)) + +#define FUNCTION_ARG_CHAIN(NODE) (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (NODE)))) +#define PROMOTES_TO_AGGR_TYPE(NODE,CODE) \ + (((CODE) == TREE_CODE (NODE) \ + && IS_AGGR_TYPE (TREE_TYPE (NODE))) \ + || IS_AGGR_TYPE (NODE)) + +#else +#define FNADDR_FROM_VTABLE_ENTRY(ENTRY) (fnaddr_from_vtable_entry (ENTRY)) +#define SET_FNADDR_FROM_VTABLE_ENTRY(ENTRY,VALUE) \ + (set_fnaddr_from_vtable_entry (ENTRY, VALUE)) +/* #define TYPE_NAME_STRING(NODE) (type_name_string (NODE)) */ +#define FUNCTION_ARG_CHAIN(NODE) (function_arg_chain (NODE)) +#define PROMOTES_TO_AGGR_TYPE(NODE,CODE) (promotes_to_aggr_type (NODE, CODE)) +/* #define IS_AGGR_TYPE_2(TYPE1, TYPE2) (is_aggr_type_2 (TYPE1, TYPE2)) */ +#endif +/* Nonzero iff TYPE is uniquely derived from PARENT. Under MI, PARENT can + be an ambiguous base class of TYPE, and this macro will be false. */ +#define UNIQUELY_DERIVED_FROM_P(PARENT, TYPE) (get_base_distance (PARENT, TYPE, 0, (tree *)0) >= 0) +#define ACCESSIBLY_DERIVED_FROM_P(PARENT, TYPE) (get_base_distance (PARENT, TYPE, -1, (tree *)0) >= 0) +#define ACCESSIBLY_UNIQUELY_DERIVED_P(PARENT, TYPE) (get_base_distance (PARENT, TYPE, 1, (tree *)0) >= 0) + +enum conversion_type { ptr_conv, constptr_conv, int_conv, + real_conv, last_conversion_type }; + +/* Statistics show that while the GNU C++ compiler may generate + thousands of different types during a compilation run, it + generates relatively few (tens) of classtypes. Because of this, + it is not costly to store a generous amount of information + in classtype nodes. This struct must fill out to a multiple of 4 bytes. */ +struct lang_type +{ + struct + { + unsigned has_type_conversion : 1; + unsigned has_int_conversion : 1; + unsigned has_float_conversion : 1; + unsigned has_init_ref : 1; + unsigned gets_init_aggr : 1; + unsigned has_assignment : 1; + unsigned has_default_ctor : 1; + unsigned uses_multiple_inheritance : 1; + + unsigned has_nonpublic_ctor : 2; + unsigned has_nonpublic_assign_ref : 2; + unsigned const_needs_init : 1; + unsigned ref_needs_init : 1; + unsigned has_const_assign_ref : 1; + unsigned vtable_needs_writing : 1; + + unsigned has_assign_ref : 1; + unsigned gets_new : 1; + unsigned gets_placed_new : 1; + unsigned gets_delete : 1; + unsigned has_call_overloaded : 1; + unsigned has_array_ref_overloaded : 1; + unsigned has_arrow_overloaded : 1; + unsigned local_typedecls : 1; + + unsigned interface_only : 1; + unsigned interface_unknown : 1; + unsigned needs_virtual_reinit : 1; + unsigned declared_exception : 1; + unsigned declared_class : 1; + unsigned being_defined : 1; + unsigned redefined : 1; + unsigned no_globalize : 1; + + unsigned marked : 1; + unsigned marked2 : 1; + unsigned marked3 : 1; + unsigned marked4 : 1; + unsigned marked5 : 1; + unsigned marked6 : 1; + unsigned use_template : 2; + + unsigned debug_requested : 1; + unsigned has_method_call_overloaded : 1; + unsigned private_attr : 1; + unsigned got_semicolon : 1; + unsigned ptrmemfunc_flag : 1; + unsigned is_signature : 1; + unsigned is_signature_pointer : 1; + unsigned is_signature_reference : 1; + + unsigned has_default_implementation : 1; + unsigned grokking_typedef : 1; + unsigned has_opaque_typedecls : 1; + unsigned sigtable_has_been_generated : 1; + unsigned was_anonymous : 1; + unsigned has_real_assignment : 1; + unsigned has_real_assign_ref : 1; + unsigned has_const_init_ref : 1; + + unsigned has_complex_init_ref : 1; + unsigned has_complex_assign_ref : 1; + + /* The MIPS compiler gets it wrong if this struct also + does not fill out to a multiple of 4 bytes. Add a + member `dummy' with new bits if you go over the edge. */ + unsigned dummy : 22; + + unsigned n_vancestors : 16; + } type_flags; + + int cid; + int n_ancestors; + int vsize; + int max_depth; + int vfield_parent; + + union tree_node *vbinfo[2]; + union tree_node *baselink_vec; + union tree_node *vfields; + union tree_node *vbases; + union tree_node *vbase_size; + + union tree_node *tags; + char *memoized_table_entry; + + char *search_slot; + +#ifdef ONLY_INT_FIELDS + unsigned int mode : 8; +#else + enum machine_mode mode : 8; +#endif + + unsigned char size_unit; + unsigned char align; + unsigned char sep_unit; + + union tree_node *sep; + union tree_node *size; + + union tree_node *base_init_list; + union tree_node *abstract_virtuals; + union tree_node *as_list; + union tree_node *id_as_list; + union tree_node *binfo_as_list; + union tree_node *vtbl_ptr; + union tree_node *instance_variable; + union tree_node *friend_classes; + + char *mi_matrix; + union tree_node *conversions[last_conversion_type]; + + union tree_node *dossier; + + union tree_node *signature; + union tree_node *signature_pointer_to; + union tree_node *signature_reference_to; +}; + +/* Indicates whether a template should be (or has been) expanded for this + class definition. 0=do, 1=did, 2=don't, 3=didn't. */ +#define CLASSTYPE_USE_TEMPLATE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.use_template) + +/* Fields used for storing information before the class is defined. + After the class is defined, these fields hold other information. */ + +/* List of friends which were defined inline in this class definition. */ +#define CLASSTYPE_INLINE_FRIENDS(NODE) (TYPE_NONCOPIED_PARTS (NODE)) + +/* Nonzero for _CLASSTYPE means that the _CLASSTYPE either has + a special meaning for the assignment operator ("operator="), + or one of its fields (or base members) has a special meaning + defined. */ +#define TYPE_HAS_ASSIGNMENT(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_assignment) +#define TYPE_HAS_REAL_ASSIGNMENT(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_real_assignment) + +/* Nonzero for _CLASSTYPE means that operator new and delete are defined, + respectively. */ +#define TREE_GETS_NEW(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.gets_new) +#define TREE_GETS_PLACED_NEW(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.gets_placed_new) +#define TREE_GETS_DELETE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.gets_delete) + +/* Nonzero for TREE_LIST or _TYPE node means that this node is class-local. */ +#define TREE_NONLOCAL_FLAG(NODE) (TREE_LANG_FLAG_0 (NODE)) + +/* Nonzero for a _CLASSTYPE node which we know to be private. */ +#define TYPE_PRIVATE_P(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.private_attr) + +/* Nonzero means that this _CLASSTYPE node defines ways of converting + itself to other types. */ +#define TYPE_HAS_CONVERSION(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_type_conversion) + +/* Nonzero means that this _CLASSTYPE node can convert itself to an + INTEGER_TYPE. */ +#define TYPE_HAS_INT_CONVERSION(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_int_conversion) + +/* Nonzero means that this _CLASSTYPE node can convert itself to an + REAL_TYPE. */ +#define TYPE_HAS_REAL_CONVERSION(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_float_conversion) + +/* Nonzero means that this _CLASSTYPE node overloads operator=(X&). */ +#define TYPE_HAS_ASSIGN_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_assign_ref) +#define TYPE_HAS_CONST_ASSIGN_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_const_assign_ref) + +/* Nonzero means that this _CLASSTYPE node has an X(X&) constructor. */ +#define TYPE_HAS_INIT_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_init_ref) +#define TYPE_HAS_CONST_INIT_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_const_init_ref) + +/* Nonzero means that this _CLASSTYPE node has an X(X ...) constructor. + Note that there must be other arguments, or this constructor is flagged + as being erroneous. */ +#define TYPE_GETS_INIT_AGGR(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.gets_init_aggr) + +/* Nonzero means that this type is being defined. I.e., the left brace + starting the definition of this type has been seen. */ +#define TYPE_BEING_DEFINED(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.being_defined) +/* Nonzero means that this type has been redefined. In this case, if + convenient, don't reprocess any methods that appear in its redefinition. */ +#define TYPE_REDEFINED(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.redefined) + +/* Nonzero means that this _CLASSTYPE node overloads the method call + operator. In this case, all method calls go through `operator->()(...). */ +#define TYPE_OVERLOADS_METHOD_CALL_EXPR(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_method_call_overloaded) + +/* Nonzero means that this type is a signature. */ +# define IS_SIGNATURE(NODE) (TYPE_LANG_SPECIFIC(NODE)?TYPE_LANG_SPECIFIC(NODE)->type_flags.is_signature:0) +# define SET_SIGNATURE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.is_signature=1) +# define CLEAR_SIGNATURE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.is_signature=0) + +/* Nonzero means that this type is a signature pointer type. */ +# define IS_SIGNATURE_POINTER(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.is_signature_pointer) + +/* Nonzero means that this type is a signature reference type. */ +# define IS_SIGNATURE_REFERENCE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.is_signature_reference) + +/* Nonzero means that this signature type has a default implementation. */ +# define HAS_DEFAULT_IMPLEMENTATION(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_default_implementation) + +/* Nonzero means that grokdeclarator works on a signature-local typedef. */ +#define SIGNATURE_GROKKING_TYPEDEF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.grokking_typedef) + +/* Nonzero means that this signature contains opaque type declarations. */ +#define SIGNATURE_HAS_OPAQUE_TYPEDECLS(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_opaque_typedecls) + +/* Nonzero means that a signature table has been generated + for this signature. */ +#define SIGTABLE_HAS_BEEN_GENERATED(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.sigtable_has_been_generated) + +/* If NODE is a class, this is the signature type that contains NODE's + signature after it has been computed using sigof(). */ +#define CLASSTYPE_SIGNATURE(NODE) (TYPE_LANG_SPECIFIC(NODE)->signature) + +/* If NODE is a signature pointer or signature reference, this is the + signature type the pointer/reference points to. */ +#define SIGNATURE_TYPE(NODE) (TYPE_LANG_SPECIFIC(NODE)->signature) + +/* If NODE is a signature, this is a vector of all methods defined + in the signature or in its base types together with their default + implementations. */ +#define SIGNATURE_METHOD_VEC(NODE) (TYPE_LANG_SPECIFIC(NODE)->signature) + +/* If NODE is a signature, this is the _TYPE node that contains NODE's + signature pointer type. */ +#define SIGNATURE_POINTER_TO(NODE) (TYPE_LANG_SPECIFIC(NODE)->signature_pointer_to) + +/* If NODE is a signature, this is the _TYPE node that contains NODE's + signature reference type. */ +#define SIGNATURE_REFERENCE_TO(NODE) (TYPE_LANG_SPECIFIC(NODE)->signature_reference_to) + +/* The is the VAR_DECL that contains NODE's dossier. */ +#define CLASSTYPE_DOSSIER(NODE) (TYPE_LANG_SPECIFIC(NODE)->dossier) + +/* Nonzero means that this _CLASSTYPE node overloads operator(). */ +#define TYPE_OVERLOADS_CALL_EXPR(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_call_overloaded) + +/* Nonzero means that this _CLASSTYPE node overloads operator[]. */ +#define TYPE_OVERLOADS_ARRAY_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_array_ref_overloaded) + +/* Nonzero means that this _CLASSTYPE node overloads operator->. */ +#define TYPE_OVERLOADS_ARROW(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_arrow_overloaded) + +/* Nonzero means that this _CLASSTYPE (or one of its ancestors) uses + multiple inheritance. If this is 0 for the root of a type + hierarchy, then we can use more efficient search techniques. */ +#define TYPE_USES_MULTIPLE_INHERITANCE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.uses_multiple_inheritance) + +/* Nonzero means that this _CLASSTYPE (or one of its ancestors) uses + virtual base classes. If this is 0 for the root of a type + hierarchy, then we can use more efficient search techniques. */ +#define TYPE_USES_VIRTUAL_BASECLASSES(NODE) (TREE_LANG_FLAG_3(NODE)) + +/* List of lists of member functions defined in this class. */ +#define CLASSTYPE_METHOD_VEC(NODE) TYPE_METHODS(NODE) + +/* Pointer from any member function to the head of the list of + member functions of the type that member function belongs to. */ +#define CLASSTYPE_BASELINK_VEC(NODE) (TYPE_LANG_SPECIFIC(NODE)->baselink_vec) + +/* Mark bits for depth-first and breath-first searches. */ +#define CLASSTYPE_MARKED(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked) +#define CLASSTYPE_MARKED2(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked2) +#define CLASSTYPE_MARKED3(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked3) +#define CLASSTYPE_MARKED4(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked4) +#define CLASSTYPE_MARKED5(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked5) +#define CLASSTYPE_MARKED6(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.marked6) +/* Macros to modify the above flags */ +#define SET_CLASSTYPE_MARKED(NODE) (CLASSTYPE_MARKED(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED(NODE) (CLASSTYPE_MARKED(NODE) = 0) +#define SET_CLASSTYPE_MARKED2(NODE) (CLASSTYPE_MARKED2(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED2(NODE) (CLASSTYPE_MARKED2(NODE) = 0) +#define SET_CLASSTYPE_MARKED3(NODE) (CLASSTYPE_MARKED3(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED3(NODE) (CLASSTYPE_MARKED3(NODE) = 0) +#define SET_CLASSTYPE_MARKED4(NODE) (CLASSTYPE_MARKED4(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED4(NODE) (CLASSTYPE_MARKED4(NODE) = 0) +#define SET_CLASSTYPE_MARKED5(NODE) (CLASSTYPE_MARKED5(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED5(NODE) (CLASSTYPE_MARKED5(NODE) = 0) +#define SET_CLASSTYPE_MARKED6(NODE) (CLASSTYPE_MARKED6(NODE) = 1) +#define CLEAR_CLASSTYPE_MARKED6(NODE) (CLASSTYPE_MARKED6(NODE) = 0) + +#define CLASSTYPE_TAGS(NODE) (TYPE_LANG_SPECIFIC(NODE)->tags) + +/* If this class has any bases, this is the number of the base class from + which our VFIELD is based, -1 otherwise. If this class has no base + classes, this is not used. + In D : B1, B2, PARENT would be 0, if D's vtable came from B1, + 1, if D's vtable came from B2. */ +#define CLASSTYPE_VFIELD_PARENT(NODE) (TYPE_LANG_SPECIFIC(NODE)->vfield_parent) + +/* Remove when done merging. */ +#define CLASSTYPE_VFIELD(NODE) TYPE_VFIELD(NODE) + +/* The number of virtual functions defined for this + _CLASSTYPE node. */ +#define CLASSTYPE_VSIZE(NODE) (TYPE_LANG_SPECIFIC(NODE)->vsize) +/* The virtual base classes that this type uses. */ +#define CLASSTYPE_VBASECLASSES(NODE) (TYPE_LANG_SPECIFIC(NODE)->vbases) +/* The virtual function pointer fields that this type contains. */ +#define CLASSTYPE_VFIELDS(NODE) (TYPE_LANG_SPECIFIC(NODE)->vfields) + +/* Number of baseclasses defined for this type. + 0 means no base classes. */ +#define CLASSTYPE_N_BASECLASSES(NODE) \ + (TYPE_BINFO_BASETYPES (NODE) ? TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES(NODE)) : 0) + +/* Memoize the number of super classes (base classes) tha this node + has. That way we can know immediately (albeit conservatively how + large a multiple-inheritance matrix we need to build to find + derivation information. */ +#define CLASSTYPE_N_SUPERCLASSES(NODE) (TYPE_LANG_SPECIFIC(NODE)->n_ancestors) +#define CLASSTYPE_N_VBASECLASSES(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.n_vancestors) + +/* Record how deep the inheritance is for this class so `void*' conversions + are less favorable than a conversion to the most base type. */ +#define CLASSTYPE_MAX_DEPTH(NODE) (TYPE_LANG_SPECIFIC(NODE)->max_depth) + +/* Used for keeping search-specific information. Any search routine + which uses this must define what exactly this slot is used for. */ +#define CLASSTYPE_SEARCH_SLOT(NODE) (TYPE_LANG_SPECIFIC(NODE)->search_slot) + +/* Entry for keeping memoization tables for this type to + hopefully speed up search routines. Since it is a pointer, + it can mean almost anything. */ +#define CLASSTYPE_MTABLE_ENTRY(NODE) (TYPE_LANG_SPECIFIC(NODE)->memoized_table_entry) + +/* This is the total size of the baseclasses defined for this type. + Needed because it is desirable to layout such information + before beginning to process the class itself, and we + don't want to compute it second time when actually laying + out the type for real. */ +#define CLASSTYPE_SIZE(NODE) (TYPE_LANG_SPECIFIC(NODE)->size) +#define CLASSTYPE_SIZE_UNIT(NODE) (TYPE_LANG_SPECIFIC(NODE)->size_unit) +#define CLASSTYPE_MODE(NODE) (TYPE_LANG_SPECIFIC(NODE)->mode) +#define CLASSTYPE_ALIGN(NODE) (TYPE_LANG_SPECIFIC(NODE)->align) + +/* This is the space needed for virtual base classes. NULL if + there are no virtual basetypes. */ +#define CLASSTYPE_VBASE_SIZE(NODE) (TYPE_LANG_SPECIFIC(NODE)->vbase_size) + +/* A cons list of structure elements which either have constructors + to be called, or virtual function table pointers which + need initializing. Depending on what is being initialized, + the TREE_PURPOSE and TREE_VALUE fields have different meanings: + + Member initialization: <FIELD_DECL, TYPE> + Base class construction: <NULL_TREE, BASETYPE> + Base class initialization: <BASE_INITIALIZATION, THESE_INITIALIZATIONS> + Whole type: <MEMBER_INIT, BASE_INIT>. */ +#define CLASSTYPE_BASE_INIT_LIST(NODE) (TYPE_LANG_SPECIFIC(NODE)->base_init_list) + +/* A cons list of virtual functions which cannot be inherited by + derived classes. When deriving from this type, the derived + class must provide its own definition for each of these functions. */ +#define CLASSTYPE_ABSTRACT_VIRTUALS(NODE) (TYPE_LANG_SPECIFIC(NODE)->abstract_virtuals) + +/* Nonzero means that this aggr type has been `closed' by a semicolon. */ +#define CLASSTYPE_GOT_SEMICOLON(NODE) (TYPE_LANG_SPECIFIC (NODE)->type_flags.got_semicolon) + +/* Nonzero means that the main virtual function table pointer needs to be + set because base constructors have placed the wrong value there. + If this is zero, it means that they placed the right value there, + and there is no need to change it. */ +#define CLASSTYPE_NEEDS_VIRTUAL_REINIT(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.needs_virtual_reinit) + +/* Nonzero means that if this type has virtual functions, that + the virtual function table will be written out. */ +#define CLASSTYPE_VTABLE_NEEDS_WRITING(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.vtable_needs_writing) + +/* Nonzero means that this type defines its own local type declarations. */ +#define CLASSTYPE_LOCAL_TYPEDECLS(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.local_typedecls) + +/* Nonzero means that this type has an X() constructor. */ +#define TYPE_HAS_DEFAULT_CONSTRUCTOR(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_default_ctor) + +/* Nonzero means the type declared a ctor as private or protected. We + use this to make sure we don't try to generate a copy ctor for a + class that has a member of type NODE. */ +#define TYPE_HAS_NONPUBLIC_CTOR(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_nonpublic_ctor) + +/* Ditto, for operator=. */ +#define TYPE_HAS_NONPUBLIC_ASSIGN_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_nonpublic_assign_ref) + +/* Many routines need to cons up a list of basetypes for access + checking. This field contains a TREE_LIST node whose TREE_VALUE + is the main variant of the type, and whose TREE_VIA_PUBLIC + and TREE_VIA_VIRTUAL bits are correctly set. */ +#define CLASSTYPE_AS_LIST(NODE) (TYPE_LANG_SPECIFIC(NODE)->as_list) +/* Same, but cache a list whose value is the name of this type. */ +#define CLASSTYPE_ID_AS_LIST(NODE) (TYPE_LANG_SPECIFIC(NODE)->id_as_list) +/* Same, but cache a list whose value is the binfo of this type. */ +#define CLASSTYPE_BINFO_AS_LIST(NODE) (TYPE_LANG_SPECIFIC(NODE)->binfo_as_list) + +/* Slot in which to cache a copy of the local vtable pointer. */ +#define CLASSTYPE_VTBL_PTR(NODE) (TYPE_LANG_SPECIFIC(NODE)->vtbl_ptr) + +/* Hold the instance object associated with this method. */ +#define CLASSTYPE_INST_VAR(NODE) (TYPE_LANG_SPECIFIC(NODE)->instance_variable) + +/* A list of class types with which this type is a friend. */ +#define CLASSTYPE_FRIEND_CLASSES(NODE) (TYPE_LANG_SPECIFIC(NODE)->friend_classes) + +/* Keep an inheritance lattice around so we can quickly tell whether + a type is derived from another or not. */ +#define CLASSTYPE_MI_MATRIX(NODE) (TYPE_LANG_SPECIFIC(NODE)->mi_matrix) + +/* If there is exactly one conversion to a non-void, non-const pointer type, + remember that here. If there are more than one, put + `error_mark_node' here. If there are none, this holds NULL_TREE. */ +#define CLASSTYPE_CONVERSION(NODE,KIND) \ + (TYPE_LANG_SPECIFIC(NODE)->conversions[(int) KIND]) + +/* Say whether this node was declared as a "class" or a "struct". */ +#define CLASSTYPE_DECLARED_CLASS(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.declared_class) +/* Say whether this node was declared as a "class" or a "struct". */ +#define CLASSTYPE_DECLARED_EXCEPTION(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.declared_exception) +/* whether this can be globalized. */ +#define CLASSTYPE_NO_GLOBALIZE(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.no_globalize) + +/* Nonzero if this class has const members which have no specified initialization. */ +#define CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.const_needs_init) + +/* Nonzero if this class has ref members which have no specified initialization. */ +#define CLASSTYPE_REF_FIELDS_NEED_INIT(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.ref_needs_init) + +/* Nonzero if this class is included from a header file which employs + `#pragma interface', and it is not included in its implementation file. */ +#define CLASSTYPE_INTERFACE_ONLY(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_only) + +/* Same as above, but for classes whose purpose we do not know. */ +#define CLASSTYPE_INTERFACE_UNKNOWN(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_unknown) +#define CLASSTYPE_INTERFACE_KNOWN(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_unknown == 0) +#define SET_CLASSTYPE_INTERFACE_UNKNOWN_X(NODE,X) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_unknown = !!(X)) +#define SET_CLASSTYPE_INTERFACE_UNKNOWN(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_unknown = 1) +#define SET_CLASSTYPE_INTERFACE_KNOWN(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.interface_unknown = 0) + +/* Nonzero if a _DECL node requires us to output debug info for this class. */ +#define CLASSTYPE_DEBUG_REQUESTED(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.debug_requested) + +/* Additional macros for inheritance information. */ + +#define CLASSTYPE_VBINFO(NODE,VIA_PUBLIC) \ + (TYPE_LANG_SPECIFIC (NODE)->vbinfo[VIA_PUBLIC]) + +/* When following an binfo-specific chain, this is the cumulative + via-public flag. */ +#define BINFO_VIA_PUBLIC(NODE) TREE_LANG_FLAG_5 (NODE) + +/* When building a matrix to determine by a single lookup + whether one class is derived from another or not, + this field is the index of the class in the table. */ +#define CLASSTYPE_CID(NODE) (TYPE_LANG_SPECIFIC(NODE)->cid) +#define BINFO_CID(NODE) CLASSTYPE_CID(BINFO_TYPE(NODE)) + +/* Nonzero means marked by DFS or BFS search, including searches + by `get_binfo' and `get_base_distance'. */ +#define BINFO_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLASSTYPE_MARKED(BINFO_TYPE(NODE)):TREE_LANG_FLAG_0(NODE)) +/* Macros needed because of C compilers that don't allow conditional + expressions to be lvalues. Grr! */ +#define SET_BINFO_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?SET_CLASSTYPE_MARKED(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_0(NODE)=1)) +#define CLEAR_BINFO_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLEAR_CLASSTYPE_MARKED(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_0(NODE)=0)) + +/* Nonzero means marked in building initialization list. */ +#define BINFO_BASEINIT_MARKED(NODE) CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) +/* Modifier macros */ +#define SET_BINFO_BASEINIT_MARKED(NODE) SET_CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) +#define CLEAR_BINFO_BASEINIT_MARKED(NODE) CLEAR_CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) + +/* Nonzero means marked in search through virtual inheritance hierarchy. */ +#define BINFO_VBASE_MARKED(NODE) CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) +/* Modifier macros */ +#define SET_BINFO_VBASE_MARKED(NODE) SET_CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) +#define CLEAR_BINFO_VBASE_MARKED(NODE) CLEAR_CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)) + +/* Nonzero means marked in search for members or member functions. */ +#define BINFO_FIELDS_MARKED(NODE) \ + (TREE_VIA_VIRTUAL(NODE)?CLASSTYPE_MARKED2 (BINFO_TYPE (NODE)):TREE_LANG_FLAG_2(NODE)) +#define SET_BINFO_FIELDS_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?SET_CLASSTYPE_MARKED2(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_2(NODE)=1)) +#define CLEAR_BINFO_FIELDS_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLEAR_CLASSTYPE_MARKED2(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_2(NODE)=0)) + +/* Nonzero means that this class is on a path leading to a new vtable. */ +#define BINFO_VTABLE_PATH_MARKED(NODE) \ + (TREE_VIA_VIRTUAL(NODE)?CLASSTYPE_MARKED3(BINFO_TYPE(NODE)):TREE_LANG_FLAG_3(NODE)) +#define SET_BINFO_VTABLE_PATH_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?SET_CLASSTYPE_MARKED3(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_3(NODE)=1)) +#define CLEAR_BINFO_VTABLE_PATH_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLEAR_CLASSTYPE_MARKED3(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_3(NODE)=0)) + +/* Nonzero means that this class has a new vtable. */ +#define BINFO_NEW_VTABLE_MARKED(NODE) \ + (TREE_VIA_VIRTUAL(NODE)?CLASSTYPE_MARKED4(BINFO_TYPE(NODE)):TREE_LANG_FLAG_4(NODE)) +#define SET_BINFO_NEW_VTABLE_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?SET_CLASSTYPE_MARKED4(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_4(NODE)=1)) +#define CLEAR_BINFO_NEW_VTABLE_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLEAR_CLASSTYPE_MARKED4(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_4(NODE)=0)) + +/* Nonzero means this class has initialized its virtual baseclasses. */ +#define BINFO_VBASE_INIT_MARKED(NODE) \ + (TREE_VIA_VIRTUAL(NODE)?CLASSTYPE_MARKED5(BINFO_TYPE(NODE)):TREE_LANG_FLAG_5(NODE)) +#define SET_BINFO_VBASE_INIT_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?SET_CLASSTYPE_MARKED5(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_5(NODE)=1)) +#define CLEAR_BINFO_VBASE_INIT_MARKED(NODE) (TREE_VIA_VIRTUAL(NODE)?CLEAR_CLASSTYPE_MARKED5(BINFO_TYPE(NODE)):(TREE_LANG_FLAG_5(NODE)=0)) + +/* Accessor macros for the vfield slots in structures. */ + +/* Get the assoc info that caused this vfield to exist. */ +#define VF_BINFO_VALUE(NODE) TREE_PURPOSE (NODE) + +/* Get that same information as a _TYPE. */ +#define VF_BASETYPE_VALUE(NODE) TREE_VALUE (NODE) + +/* Get the value of the top-most type dominating the non-`normal' vfields. */ +#define VF_DERIVED_VALUE(NODE) (VF_BINFO_VALUE (NODE) ? BINFO_TYPE (VF_BINFO_VALUE (NODE)) : NULL_TREE) + +/* Get the value of the top-most type that's `normal' for the vfield. */ +#define VF_NORMAL_VALUE(NODE) TREE_TYPE (NODE) + +/* Nonzero for TREE_LIST node means that this list of things + is a list of parameters, as opposed to a list of expressions. */ +#define TREE_PARMLIST(NODE) ((NODE)->common.unsigned_flag) /* overloaded! */ + +/* For FUNCTION_TYPE or METHOD_TYPE, a list of the exceptions that + this type can raise. */ +#define TYPE_RAISES_EXCEPTIONS(NODE) TYPE_NONCOPIED_PARTS (NODE) + +struct lang_decl_flags +{ +#ifdef ONLY_INT_FIELDS + int language : 8; +#else + enum languages language : 8; +#endif + + unsigned operator_attr : 1; + unsigned constructor_attr : 1; + unsigned returns_first_arg : 1; + unsigned preserves_first_arg : 1; + unsigned friend_attr : 1; + unsigned static_function : 1; + unsigned const_memfunc : 1; + unsigned volatile_memfunc : 1; + + unsigned abstract_virtual : 1; + unsigned permanent_attr : 1 ; + unsigned constructor_for_vbase_attr : 1; + unsigned mutable_flag : 1; + unsigned is_default_implementation : 1; + unsigned synthesized : 1; + unsigned dummy : 10; + + tree access; + tree context; + tree memfunc_pointer_to; +}; + +struct lang_decl +{ + struct lang_decl_flags decl_flags; + + struct template_info *template_info; + tree main_decl_variant; + struct pending_inline *pending_inline_info; + tree vbase_init_list; + tree chain; +}; + +/* Non-zero if NODE is a _DECL with TREE_READONLY set. */ +#define TREE_READONLY_DECL_P(NODE) \ + (TREE_READONLY (NODE) && TREE_CODE_CLASS (TREE_CODE (NODE)) == 'd') + +/* For FUNCTION_DECLs: return the language in which this decl + was declared. */ +#define DECL_LANGUAGE(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.language) + +/* For FUNCTION_DECLs: nonzero means that this function is a constructor. */ +#define DECL_CONSTRUCTOR_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.constructor_attr) +/* For FUNCTION_DECLs: nonzero means that this function is a constructor + for an object with virtual baseclasses. */ +#define DECL_CONSTRUCTOR_FOR_VBASE_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.constructor_for_vbase_attr) + +/* For FUNCTION_DECLs: nonzero means that this function is a default + implementation of a signature method. */ +#define IS_DEFAULT_IMPLEMENTATION(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.is_default_implementation) + +/* For FUNCTION_DECLs: nonzero means that the constructor + is known to return a non-zero `this' unchanged. */ +#define DECL_RETURNS_FIRST_ARG(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.returns_first_arg) + +/* Nonzero for FUNCTION_DECL means that this constructor is known to + not make any assignment to `this', and therefore can be trusted + to return it unchanged. Otherwise, we must re-assign `current_class_decl' + after performing base initializations. */ +#define DECL_PRESERVES_THIS(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.preserves_first_arg) + +/* Nonzero for _DECL means that this decl appears in (or will appear + in) as a member in a RECORD_TYPE or UNION_TYPE node. It is also for + detecting circularity in case members are multiply defined. In the + case of a VAR_DECL, it is also used to determine how program storage + should be allocated. */ +#define DECL_IN_AGGR_P(NODE) (DECL_LANG_FLAG_3(NODE)) + +/* Nonzero for FUNCTION_DECL means that this decl is just a + friend declaration, and should not be added to the list of + member functions for this class. */ +#define DECL_FRIEND_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.friend_attr) + +/* Nonzero for FUNCTION_DECL means that this decl is a static + member function. */ +#define DECL_STATIC_FUNCTION_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.static_function) + +/* Nonzero for FUNCTION_DECL means that this member function + has `this' as const X *const. */ +#define DECL_CONST_MEMFUNC_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.const_memfunc) + +/* Nonzero for FUNCTION_DECL means that this member function + has `this' as volatile X *const. */ +#define DECL_VOLATILE_MEMFUNC_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.volatile_memfunc) + +/* Nonzero for _DECL means that this member object type + is mutable. */ +#define DECL_MUTABLE_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.mutable_flag) + +/* Nonzero for FUNCTION_DECL means that this member function + exists as part of an abstract class's interface. */ +#define DECL_ABSTRACT_VIRTUAL_P(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.abstract_virtual) + +/* Nonzero if allocated on permanent_obstack. */ +#define LANG_DECL_PERMANENT(LANGDECL) ((LANGDECL)->decl_flags.permanent_attr) + +/* The _TYPE context in which this _DECL appears. This field is used + only to compute access information. */ +#define DECL_CLASS_CONTEXT(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.context) + +/* For a FUNCTION_DECL: the chain through which the next method + in the method chain is found. We now use TREE_CHAIN to + link into the FIELD_DECL chain. */ +#if 1 +#define DECL_CHAIN(NODE) (DECL_LANG_SPECIFIC(NODE)->chain) +#else +#define DECL_CHAIN(NODE) (TREE_CHAIN (NODE)) +#endif + +/* Points back to the decl which caused this lang_decl to be allocated. */ +#define DECL_MAIN_VARIANT(NODE) (DECL_LANG_SPECIFIC(NODE)->main_decl_variant) + +/* For a FUNCTION_DECL: if this function was declared inline inside of + a class declaration, this is where the text for the function is + squirreled away. */ +#define DECL_PENDING_INLINE_INFO(NODE) (DECL_LANG_SPECIFIC(NODE)->pending_inline_info) + +/* For a FUNCTION_DECL: if this function was declared inside a signature + declaration, this is the corresponding member function pointer that was + created for it. */ +#define DECL_MEMFUNC_POINTER_TO(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.memfunc_pointer_to) + +/* For a FIELD_DECL: this points to the signature member function from + which this signature member function pointer was created. */ +#define DECL_MEMFUNC_POINTING_TO(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.memfunc_pointer_to) + +/* Holds information about how virtual base classes should be initialized + by this constructor *if* this constructor is the one to perform + such initialization. */ +#define DECL_VBASE_INIT_LIST(NODE) (DECL_LANG_SPECIFIC(NODE)->vbase_init_list) + +/* For a TEMPLATE_DECL: template-specific information. */ +#define DECL_TEMPLATE_INFO(NODE) (DECL_LANG_SPECIFIC(NODE)->template_info) + +/* Nonzero in INT_CST means that this int is negative by dint of + using a twos-complement negated operand. */ +#define TREE_NEGATED_INT(NODE) (TREE_LANG_FLAG_0 (NODE)) + +/* Nonzero in any kind of _EXPR or _REF node means that it is a call + to a storage allocation routine. If, later, alternate storage + is found to hold the object, this call can be ignored. */ +#define TREE_CALLS_NEW(NODE) (TREE_LANG_FLAG_1 (NODE)) + +/* Nonzero in any kind of _TYPE that uses multiple inheritance + or virtual baseclasses. */ +#define TYPE_USES_COMPLEX_INHERITANCE(NODE) (TREE_LANG_FLAG_1 (NODE)) + +/* Nonzero in IDENTIFIER_NODE means that this name is overloaded, and + should be looked up in a non-standard way. */ +#define TREE_OVERLOADED(NODE) (TREE_LANG_FLAG_0 (NODE)) +#define DECL_OVERLOADED(NODE) (DECL_LANG_FLAG_4 (NODE)) + +/* Nonzero if this (non-TYPE)_DECL has its virtual attribute set. + For a FUNCTION_DECL, this is when the function is a virtual function. + For a VAR_DECL, this is when the variable is a virtual function table. + For a FIELD_DECL, when the field is the field for the virtual function table. + For an IDENTIFIER_NODE, nonzero if any function with this name + has been declared virtual. + + For a _TYPE if it uses virtual functions (or is derived from + one that does). */ +#define TYPE_VIRTUAL_P(NODE) (TREE_LANG_FLAG_2 (NODE)) + +#if 0 +/* Same, but tells if this field is private in current context. */ +#define DECL_PRIVATE(NODE) (DECL_LANG_FLAG_5 (NODE)) + +/* Same, but tells if this field is private in current context. */ +#define DECL_PROTECTED(NODE) (DECL_LANG_FLAG_6 (NODE)) + +#define DECL_PUBLIC(NODE) (DECL_LANG_FLAG_7 (NODE)) +#endif + +/* This method was synthesized by cons_up_default_function. */ +#define DECL_SYNTHESIZED(NODE) (DECL_LANG_SPECIFIC (NODE)->decl_flags.synthesized) + +/* Record whether a typedef for type `int' was actually `signed int'. */ +#define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp)) + +/* Nonzero if the type T promotes to itself. + ANSI C states explicitly the list of types that promote; + in particular, short promotes to int even if they have the same width. */ +#define C_PROMOTING_INTEGER_TYPE_P(t) \ + (TREE_CODE ((t)) == INTEGER_TYPE \ + && (TYPE_MAIN_VARIANT (t) == char_type_node \ + || TYPE_MAIN_VARIANT (t) == signed_char_type_node \ + || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \ + || TYPE_MAIN_VARIANT (t) == short_integer_type_node \ + || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node)) + +/* Mark which labels are explicitly declared. + These may be shadowed, and may be referenced from nested functions. */ +#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) + +/* Record whether a type or decl was written with nonconstant size. + Note that TYPE_SIZE may have simplified to a constant. */ +#define C_TYPE_VARIABLE_SIZE(type) TREE_LANG_FLAG_4 (type) +#define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_8 (type) + +/* Nonzero for _TYPE means that the _TYPE defines + at least one constructor. */ +#define TYPE_HAS_CONSTRUCTOR(NODE) (TYPE_LANG_FLAG_1(NODE)) + +/* When appearing in an INDIRECT_REF, it means that the tree structure + underneath is actually a call to a constructor. This is needed + when the constructor must initialize local storage (which can + be automatically destroyed), rather than allowing it to allocate + space from the heap. + + When appearing in a SAVE_EXPR, it means that underneath + is a call to a constructor. + + When appearing in a CONSTRUCTOR, it means that it was + a GNU C constructor expression. + + When appearing in a FIELD_DECL, it means that this field + has been duly initialized in its constructor. */ +#define TREE_HAS_CONSTRUCTOR(NODE) (TREE_LANG_FLAG_4(NODE)) + +/* Indicates that a NON_LVALUE_EXPR came from a C++ reference. + Used to generate more helpful error message in case somebody + tries to take its address. */ +#define TREE_REFERENCE_EXPR(NODE) (TREE_LANG_FLAG_3(NODE)) + +/* Nonzero for _TYPE means that the _TYPE defines a destructor. */ +#define TYPE_HAS_DESTRUCTOR(NODE) (TYPE_LANG_FLAG_2(NODE)) + +/* Nonzero for _TYPE node means that creating an object of this type + will involve a call to a constructor. This can apply to objects + of ARRAY_TYPE if the type of the elements needs a constructor. */ +#define TYPE_NEEDS_CONSTRUCTING(NODE) (TYPE_LANG_FLAG_3(NODE)) + +/* Nonzero if there is a user-defined X::op=(x&) for this class. */ +#define TYPE_HAS_REAL_ASSIGN_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_real_assign_ref) +#define TYPE_HAS_COMPLEX_ASSIGN_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_complex_assign_ref) +#define TYPE_HAS_COMPLEX_INIT_REF(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.has_complex_init_ref) + +/* Nonzero for _TYPE node means that destroying an object of this type + will involve a call to a destructor. This can apply to objects + of ARRAY_TYPE is the type of the elements needs a destructor. */ +#define TYPE_NEEDS_DESTRUCTOR(NODE) (TYPE_LANG_FLAG_4(NODE)) + +/* Nonzero for _TYPE node means that this type is a pointer to member + function type. */ +#define TYPE_PTRMEMFUNC_P(NODE) (TREE_CODE(NODE) == RECORD_TYPE && TYPE_LANG_SPECIFIC(NODE)->type_flags.ptrmemfunc_flag) +#define TYPE_PTRMEMFUNC_FLAG(NODE) (TYPE_LANG_SPECIFIC(NODE)->type_flags.ptrmemfunc_flag) +/* Get the POINTER_TYPE to the METHOD_TYPE associated with this + pointer to member function. TYPE_PTRMEMFUNC_P _must_ be true, + before using this macro. */ +#define TYPE_PTRMEMFUNC_FN_TYPE(NODE) (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (TREE_CHAIN (TREE_CHAIN (TYPE_FIELDS (NODE))))))) +/* These are use to manipulate the the canonical RECORD_TYPE from the + hashed POINTER_TYPE, and can only be used on the POINTER_TYPE. */ +#define TYPE_GET_PTRMEMFUNC_TYPE(NODE) ((tree)TYPE_LANG_SPECIFIC(NODE)) +#define TYPE_SET_PTRMEMFUNC_TYPE(NODE, VALUE) (TYPE_LANG_SPECIFIC(NODE) = ((struct lang_type *)(void*)(VALUE))) +/* These are to get the delta2 and pfn fields from a TYPE_PTRMEMFUNC_P. */ +#define DELTA2_FROM_PTRMEMFUNC(NODE) (build_component_ref (build_component_ref ((NODE), pfn_or_delta2_identifier, 0, 0), delta2_identifier, 0, 0)) +#define PFN_FROM_PTRMEMFUNC(NODE) (build_component_ref (build_component_ref ((NODE), pfn_or_delta2_identifier, 0, 0), pfn_identifier, 0, 0)) + +/* Nonzero for VAR_DECL node means that `external' was specified in + its declaration. */ +#define DECL_THIS_EXTERN(NODE) (DECL_LANG_FLAG_2(NODE)) + +/* Nonzero for SAVE_EXPR if used to initialize a PARM_DECL. */ +#define PARM_DECL_EXPR(NODE) (TREE_LANG_FLAG_2(NODE)) + +/* Nonzero in FUNCTION_DECL means it is really an operator. + Just used to communicate formatting information to dbxout.c. */ +#define DECL_OPERATOR(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.operator_attr) + +#define ANON_UNION_P(NODE) (DECL_NAME (NODE) == 0) + +#define UNKNOWN_TYPE LANG_TYPE + +/* Define fields and accessors for nodes representing declared names. */ + +#if 0 +/* C++: A derived class may be able to directly use the virtual + function table of a base class. When it does so, it may + still have a decl node used to access the virtual function + table (so that variables of this type can initialize their + virtual function table pointers by name). When such thievery + is committed, know exactly which base class's virtual function + table is the one being stolen. This effectively computes the + transitive closure. */ +#define DECL_VPARENT(NODE) ((NODE)->decl.arguments) +#endif + +/* Make a slot so we can implement nested types. This slot holds + the IDENTIFIER_NODE that uniquely names the nested type. This + is for TYPE_DECLs only. */ +#define DECL_NESTED_TYPENAME(NODE) ((NODE)->decl.arguments) +#define TYPE_NESTED_NAME(NODE) (DECL_NESTED_TYPENAME (TYPE_NAME (NODE))) + +#define TYPE_WAS_ANONYMOUS(NODE) (TYPE_LANG_SPECIFIC (NODE)->type_flags.was_anonymous) + +/* C++: all of these are overloaded! These apply only to TYPE_DECLs. */ +#define DECL_FRIENDLIST(NODE) (DECL_INITIAL (NODE)) +#if 0 +#define DECL_UNDEFINED_FRIENDS(NODE) ((NODE)->decl.result) +#endif +#define DECL_WAITING_FRIENDS(NODE) ((tree)(NODE)->decl.rtl) +#define SET_DECL_WAITING_FRIENDS(NODE,VALUE) \ + ((NODE)->decl.rtl=(struct rtx_def*)VALUE) + +/* The DECL_ACCESS is used to record under which context + special access rules apply. */ +#define DECL_ACCESS(NODE) (DECL_LANG_SPECIFIC(NODE)->decl_flags.access) + +/* C++: all of these are overloaded! + These apply to PARM_DECLs and VAR_DECLs. */ +#define DECL_REFERENCE_SLOT(NODE) ((tree)(NODE)->decl.arguments) +#define SET_DECL_REFERENCE_SLOT(NODE,VAL) ((NODE)->decl.arguments=VAL) + +/* For local VAR_DECLs, holds index into gc-protected obstack. */ +#define DECL_GC_OFFSET(NODE) ((NODE)->decl.result) + +/* Accessor macros for C++ template decl nodes. */ +#define DECL_TEMPLATE_IS_CLASS(NODE) (DECL_RESULT(NODE) == NULL_TREE) +#define DECL_TEMPLATE_PARMS(NODE) DECL_ARGUMENTS(NODE) +/* For class templates. */ +#define DECL_TEMPLATE_MEMBERS(NODE) DECL_INITIAL(NODE) +/* For function, method, class-data templates. */ +#define DECL_TEMPLATE_RESULT(NODE) DECL_RESULT(NODE) +#define DECL_TEMPLATE_INSTANTIATIONS(NODE) DECL_VINDEX(NODE) + +/* ...and for unexpanded-parameterized-type nodes. */ +#define UPT_TEMPLATE(NODE) TREE_PURPOSE(TYPE_VALUES(NODE)) +#define UPT_PARMS(NODE) TREE_VALUE(TYPE_VALUES(NODE)) + +/* An enumeration of the kind of tags that C++ accepts. */ +enum tag_types { record_type, class_type, union_type, enum_type, + exception_type, signature_type }; + +/* Zero means prototype weakly, as in ANSI C (no args means nothing). + Each language context defines how this variable should be set. */ +extern int strict_prototype; +extern int strict_prototypes_lang_c, strict_prototypes_lang_cplusplus; + +/* Non-zero means that if a label exists, and no other identifier + applies, use the value of the label. */ +extern int flag_labels_ok; + +/* Non-zero means to collect statistics which might be expensive + and to print them when we are done. */ +extern int flag_detailed_statistics; + +/* Non-zero means warn in function declared in derived class has the + same name as a virtual in the base class, but fails to match the + type signature of any virtual function in the base class. */ +extern int warn_overloaded_virtual; + +/* in c-common.c */ +extern void declare_function_name PROTO((void)); +extern void decl_attributes PROTO((tree, tree)); +extern void init_function_format_info PROTO((void)); +extern void record_function_format PROTO((tree, tree, int, int, int)); +extern void check_function_format PROTO((tree, tree, tree)); +/* Print an error message for invalid operands to arith operation CODE. + NOP_EXPR is used as a special case (see truthvalue_conversion). */ +extern void binary_op_error PROTO((enum tree_code)); +extern void c_expand_expr_stmt PROTO((tree)); +/* Validate the expression after `case' and apply default promotions. */ +extern tree check_case_value PROTO((tree)); +/* Concatenate a list of STRING_CST nodes into one STRING_CST. */ +extern tree combine_strings PROTO((tree)); +extern void constant_expression_warning PROTO((tree)); +extern tree convert_and_check PROTO((tree, tree)); +extern void overflow_warning PROTO((tree)); +extern void unsigned_conversion_warning PROTO((tree, tree)); +/* Read the rest of the current #-directive line. */ +extern char *get_directive_line STDIO_PROTO((FILE *)); +/* Subroutine of build_binary_op, used for comparison operations. + See if the operands have both been converted from subword integer types + and, if so, perhaps change them both back to their original type. */ +extern tree shorten_compare PROTO((tree *, tree *, tree *, enum tree_code *)); +/* Prepare expr to be an argument of a TRUTH_NOT_EXPR, + or validate its data type for an `if' or `while' statement or ?..: exp. */ +extern tree truthvalue_conversion PROTO((tree)); +extern tree type_for_mode PROTO((enum machine_mode, int)); +extern tree type_for_size PROTO((unsigned, int)); + +/* in cp-decl{2}.c */ +extern tree void_list_node; +extern tree void_zero_node; +extern tree default_function_type; +extern tree vtable_entry_type; +extern tree sigtable_entry_type; +extern tree __t_desc_type_node, __i_desc_type_node, __m_desc_type_node; +extern tree Type_info_type_node; +extern tree class_star_type_node; +extern tree this_identifier; +extern tree pfn_identifier; +extern tree index_identifier; +extern tree delta_identifier; +extern tree delta2_identifier; +extern tree pfn_or_delta2_identifier; + +/* A node that is a list (length 1) of error_mark_nodes. */ +extern tree error_mark_list; + +extern tree ptr_type_node, const_ptr_type_node; +extern tree class_type_node, record_type_node, union_type_node, enum_type_node; +extern tree exception_type_node, unknown_type_node; +extern tree opaque_type_node, signature_type_node; + +/* The largest size a virtual function table can be. + Must be a (power of 2). */ +#ifndef VINDEX_MAX +#define VINDEX_MAX ((unsigned)128) +/* This is the integer ~ (vindex_max - 1). */ +#endif +extern tree vtbl_mask; + +/* Array type `(void *)[]' */ +extern tree vtbl_type_node; +extern tree delta_type_node; + +extern tree long_long_integer_type_node, long_long_unsigned_type_node; +/* For building calls to `delete'. */ +extern tree integer_two_node, integer_three_node; + +/* in cp-except.c */ +extern tree current_exception_type; +extern tree current_exception_decl; +extern tree current_exception_object; + +/* in cp-pt.c */ +/* PARM_VEC is a vector of template parameters, either IDENTIFIER_NODEs or + PARM_DECLs. BINDINGS, if non-null, is a vector of bindings for those + parameters. */ +struct template_info { + /* Vector of template parameters, either PARM_DECLs or IDENTIFIER_NODEs. */ + tree parm_vec; + /* If non-null, a vector of bindings for the template parms. */ + tree bindings; + + /* Text of template, and length. */ + char *text; + int length; + /* Where it came from. */ + char *filename; + int lineno; + + /* What kind of aggregate -- struct, class, or null. */ + tree aggr; +}; +extern int processing_template_decl, processing_template_defn; + +/* The template currently being instantiated, and where the instantiation + was triggered. */ +struct tinst_level +{ + tree classname; + int line; + char *file; + struct tinst_level *next; +}; + +extern struct tinst_level *current_tinst_level; + +/* in cp-class.c */ +extern tree current_class_name; +extern tree current_class_type; +extern tree previous_class_type; + +extern tree current_lang_name, lang_name_cplusplus, lang_name_c; + +/* Points to the name of that function. May not be the DECL_NAME + of CURRENT_FUNCTION_DECL due to overloading */ +extern tree original_function_name; + +extern tree current_class_name, current_class_type, current_class_decl, C_C_D; +extern tree current_vtable_decl; + +/* in cp-init.c */ +extern tree global_base_init_list; +extern tree current_base_init_list, current_member_init_list; + +extern int current_function_assigns_this; +extern int current_function_just_assigned_this; +extern int current_function_parms_stored; + +/* Here's where we control how name mangling takes place. */ + +#define OPERATOR_ASSIGN_FORMAT "__a%s" +#define OPERATOR_FORMAT "__%s" +#define OPERATOR_TYPENAME_FORMAT "__op" +#define OPERATOR_TYPENAME_P(ID_NODE) \ + (IDENTIFIER_POINTER (ID_NODE)[0] == '_' \ + && IDENTIFIER_POINTER (ID_NODE)[1] == '_' \ + && IDENTIFIER_POINTER (ID_NODE)[2] == 'o' \ + && IDENTIFIER_POINTER (ID_NODE)[3] == 'p') + + +/* Cannot use '$' up front, because this confuses gdb + (names beginning with '$' are gdb-local identifiers). + + Note that all forms in which the '$' is significant are long enough + for direct indexing (meaning that if we know there is a '$' + at a particular location, we can index into the string at + any other location that provides distinguishing characters). */ + +/* Define NO_DOLLAR_IN_LABEL in your favorite tm file if your assembler + doesn't allow '$' in symbol names. */ +#ifndef NO_DOLLAR_IN_LABEL + +#define JOINER '$' + +#define VPTR_NAME "$v" +#define THROW_NAME "$eh_throw" +#define DESTRUCTOR_DECL_PREFIX "_$_" +#define AUTO_VTABLE_NAME "__vtbl$me__" +#define AUTO_TEMP_NAME "_$tmp_" +#define AUTO_TEMP_FORMAT "_$tmp_%d" +#define VTABLE_BASE "$vb" +#define VTABLE_NAME_FORMAT "_vt$%s" +#define VFIELD_BASE "$vf" +#define VFIELD_NAME "_vptr$" +#define VFIELD_NAME_FORMAT "_vptr$%s" +#define VBASE_NAME "_vb$" +#define VBASE_NAME_FORMAT "_vb$%s" +#define STATIC_NAME_FORMAT "_%s$%s" +#define ANON_AGGRNAME_FORMAT "$_%d" + +#else /* NO_DOLLAR_IN_LABEL */ + +#ifndef NO_DOT_IN_LABEL + +#define JOINER '.' + +#define VPTR_NAME ".v" +#define THROW_NAME ".eh_throw" +#define DESTRUCTOR_DECL_PREFIX "_._" +#define AUTO_VTABLE_NAME "__vtbl.me__" +#define AUTO_TEMP_NAME "_.tmp_" +#define AUTO_TEMP_FORMAT "_.tmp_%d" +#define VTABLE_BASE ".vb" +#define VTABLE_NAME_FORMAT "_vt.%s" +#define VFIELD_BASE ".vf" +#define VFIELD_NAME "_vptr." +#define VFIELD_NAME_FORMAT "_vptr.%s" +#define VBASE_NAME "_vb." +#define VBASE_NAME_FORMAT "_vb.%s" +#define STATIC_NAME_FORMAT "_%s.%s" + +#define ANON_AGGRNAME_FORMAT "._%d" + +#else /* NO_DOT_IN_LABEL */ + +#define VPTR_NAME "__vptr" +#define VPTR_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), VPTR_NAME, sizeof (VPTR_NAME) - 1)) +#define THROW_NAME "__eh_throw" +#define DESTRUCTOR_DECL_PREFIX "__destr_" +#define DESTRUCTOR_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), DESTRUCTOR_DECL_PREFIX, \ + sizeof (DESTRUCTOR_DECL_PREFIX) - 1)) +#define IN_CHARGE_NAME "__in_chrg" +#define AUTO_VTABLE_NAME "__vtbl_me__" +#define AUTO_TEMP_NAME "__tmp_" +#define TEMP_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, \ + sizeof (AUTO_TEMP_NAME) - 1)) +#define AUTO_TEMP_FORMAT "__tmp_%d" +#define VTABLE_BASE "__vtb" +#define VTABLE_NAME "__vt_" +#define VTABLE_NAME_FORMAT "__vt_%s" +#define VTABLE_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), VTABLE_NAME, \ + sizeof (VTABLE_NAME) - 1)) +#define VFIELD_BASE "__vfb" +#define VFIELD_NAME "__vptr_" +#define VFIELD_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, \ + sizeof (VFIELD_NAME) - 1)) +#define VFIELD_NAME_FORMAT "_vptr_%s" +#define VBASE_NAME "__vb_" +#define VBASE_NAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), VBASE_NAME, \ + sizeof (VBASE_NAME) - 1)) +#define VBASE_NAME_FORMAT "__vb_%s" +#define STATIC_NAME_FORMAT "__static_%s_%s" + +#define ANON_AGGRNAME_PREFIX "__anon_" +#define ANON_AGGRNAME_P(ID_NODE) \ + (!strncmp (IDENTIFIER_POINTER (ID_NODE), ANON_AGGRNAME_PREFIX, \ + sizeof (ANON_AGGRNAME_PREFIX) - 1)) +#define ANON_AGGRNAME_FORMAT "__anon_%d" +#define ANON_PARMNAME_FORMAT "__%d" +#define ANON_PARMNAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[0] == '_' \ + && IDENTIFIER_POINTER (ID_NODE)[1] == '_' \ + && IDENTIFIER_POINTER (ID_NODE)[2] <= '9') + +#endif /* NO_DOT_IN_LABEL */ +#endif /* NO_DOLLAR_IN_LABEL */ + +#define THIS_NAME "this" +#define DESTRUCTOR_NAME_FORMAT "~%s" +#define FILE_FUNCTION_PREFIX_LEN 9 + +#define IN_CHARGE_NAME "__in_chrg" + +#define VTBL_PTR_TYPE "__vtbl_ptr_type" +#define VTABLE_DELTA_NAME "__delta" +#define VTABLE_INDEX_NAME "__index" +#define VTABLE_PFN_NAME "__pfn" +#define VTABLE_DELTA2_NAME "__delta2" + +#define SIGNATURE_FIELD_NAME "__s_" +#define SIGNATURE_FIELD_NAME_FORMAT "__s_%s" +#define SIGNATURE_OPTR_NAME "__optr" +#define SIGNATURE_SPTR_NAME "__sptr" +#define SIGNATURE_VPTR_NAME "__vptr" +#define SIGNATURE_POINTER_NAME "__sp_" +#define SIGNATURE_POINTER_NAME_FORMAT "__%s%ssp_%s" +#define SIGNATURE_REFERENCE_NAME "__sr_" +#define SIGNATURE_REFERENCE_NAME_FORMAT "__%s%ssr_%s" + +#define SIGTABLE_PTR_TYPE "__sigtbl_ptr_type" +#define SIGTABLE_NAME_FORMAT "__st_%s_%s" +#define SIGTABLE_NAME_FORMAT_LONG "__st_%s_%s_%d" +#define SIGTABLE_CODE_NAME "__code" +#define SIGTABLE_OFFSET_NAME "__offset" +#define SIGTABLE_PFN_NAME "__pfn" +#define EXCEPTION_CLEANUP_NAME "exception cleanup" + +#define THIS_NAME_P(ID_NODE) (strcmp(IDENTIFIER_POINTER (ID_NODE), "this") == 0) + +#if !defined(NO_DOLLAR_IN_LABEL) || !defined(NO_DOT_IN_LABEL) + +#define VPTR_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[0] == JOINER \ + && IDENTIFIER_POINTER (ID_NODE)[1] == 'v') +#define DESTRUCTOR_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[1] == JOINER \ + && IDENTIFIER_POINTER (ID_NODE)[2] == '_') + +#define VTABLE_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[1] == 'v' \ + && IDENTIFIER_POINTER (ID_NODE)[2] == 't' \ + && IDENTIFIER_POINTER (ID_NODE)[3] == JOINER) + +#define VBASE_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[1] == 'v' \ + && IDENTIFIER_POINTER (ID_NODE)[2] == 'b' \ + && IDENTIFIER_POINTER (ID_NODE)[3] == JOINER) + +#define TEMP_NAME_P(ID_NODE) (!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, sizeof (AUTO_TEMP_NAME)-1)) +#define VFIELD_NAME_P(ID_NODE) (!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, sizeof(VFIELD_NAME)-1)) + +/* For anonymous aggregate types, we need some sort of name to + hold on to. In practice, this should not appear, but it should + not be harmful if it does. */ +#define ANON_AGGRNAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[0] == JOINER \ + && IDENTIFIER_POINTER (ID_NODE)[1] == '_') +#define ANON_PARMNAME_FORMAT "_%d" +#define ANON_PARMNAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[0] == '_' \ + && IDENTIFIER_POINTER (ID_NODE)[1] <= '9') +#endif /* !defined(NO_DOLLAR_IN_LABEL) || !defined(NO_DOT_IN_LABEL) */ + +/* Define the sets of attributes that member functions and baseclasses + can have. These are sensible combinations of {public,private,protected} + cross {virtual,non-virtual}. */ + +enum access_type { + access_default, + access_public, + access_protected, + access_private, + access_default_virtual, + access_public_virtual, + access_private_virtual +}; + +/* in cp-lex.c */ +extern tree current_unit_name, current_unit_language; + +/* Things for handling inline functions. */ + +struct pending_inline +{ + struct pending_inline *next; /* pointer to next in chain */ + int lineno; /* line number we got the text from */ + char *filename; /* name of file we were processing */ + tree fndecl; /* FUNCTION_DECL that brought us here */ + int token; /* token we were scanning */ + int token_value; /* value of token we were scanning (YYSTYPE) */ + + char *buf; /* pointer to character stream */ + int len; /* length of stream */ + tree parm_vec, bindings; /* in case this is derived from a template */ + unsigned int can_free : 1; /* free this after we're done with it? */ + unsigned int deja_vu : 1; /* set iff we don't want to see it again. */ + unsigned int interface : 2; /* 0=interface 1=unknown 2=implementation */ +}; + +/* in cp-method.c */ +extern struct pending_inline *pending_inlines; + +/* 1 for -fall-virtual: make every member function (except + constructors) lay down in the virtual function table. + Calls can then either go through the virtual function table or not, + depending on whether we know what function will actually be called. */ + +extern int flag_all_virtual; + +/* Positive values means that we cannot make optimizing assumptions about + `this'. Negative values means we know `this' to be of static type. */ + +extern int flag_this_is_variable; + +/* Controls whether enums and ints freely convert. + 1 means with complete freedom. + 0 means enums can convert to ints, but not vice-versa. */ + +extern int flag_int_enum_equivalence; + +/* Nonzero means layout structures so that we can do garbage collection. */ + +extern int flag_gc; + +/* Nonzero means generate 'dossiers' that give run-time type information. */ + +extern int flag_dossier; + +/* Nonzero means templates obey #pragma interface and implementation. */ + +extern int flag_external_templates; + +/* Nonzero means templates are emitted where they are instantiated. */ + +extern int flag_alt_external_templates; + +/* Current end of entries in the gc obstack for stack pointer variables. */ + +extern int current_function_obstack_index; + +/* Flag saying whether we have used the obstack in this function or not. */ + +extern int current_function_obstack_usage; + +enum overload_flags { NO_SPECIAL = 0, DTOR_FLAG, OP_FLAG, TYPENAME_FLAG }; + +extern tree current_class_decl, C_C_D; /* PARM_DECL: the class instance variable */ + +/* The following two can be derived from the previous one */ +extern tree current_class_name; /* IDENTIFIER_NODE: name of current class */ +extern tree current_class_type; /* _TYPE: the type of the current class */ + +/* Some macros for char-based bitfields. */ +#define B_SET(a,x) (a[x>>3] |= (1 << (x&7))) +#define B_CLR(a,x) (a[x>>3] &= ~(1 << (x&7))) +#define B_TST(a,x) (a[x>>3] & (1 << (x&7))) + +/* These are uses as bits in flags passed to build_method_call + to control its error reporting behavior. + + LOOKUP_PROTECT means flag access violations. + LOOKUP_COMPLAIN mean complain if no suitable member function + matching the arguments is found. + LOOKUP_NORMAL is just a combination of these two. + LOOKUP_AGGR requires the instance to be of aggregate type. + LOOKUP_NONVIRTUAL means make a direct call to the member function found + LOOKUP_GLOBAL means search through the space of overloaded functions, + as well as the space of member functions. + LOOKUP_HAS_IN_CHARGE means that the "in charge" variable is already + in the parameter list. + LOOKUP_NO_CONVERSION means that user-defined conversions are not + permitted. Built-in conversions are permitted. + LOOKUP_DESTRUCTOR means explicit call to destructor. */ + +#define LOOKUP_PROTECT (1) +#define LOOKUP_COMPLAIN (2) +#define LOOKUP_NORMAL (3) +#define LOOKUP_AGGR (4) +#define LOOKUP_NONVIRTUAL (8) +#define LOOKUP_GLOBAL (16) +#define LOOKUP_HAS_IN_CHARGE (32) +#define LOOKUP_SPECULATIVELY (64) +/* 128 & 256 are free */ +#define LOOKUP_NO_CONVERSION (512) +#define LOOKUP_DESTRUCTOR (512) + +/* Anatomy of a DECL_FRIENDLIST (which is a TREE_LIST): + purpose = friend name (IDENTIFIER_NODE); + value = TREE_LIST of FUNCTION_DECLS; + chain, type = EMPTY; */ +#define FRIEND_NAME(LIST) (TREE_PURPOSE (LIST)) +#define FRIEND_DECLS(LIST) (TREE_VALUE (LIST)) + +/* These macros are for accessing the fields of TEMPLATE...PARM nodes. */ +#define TEMPLATE_TYPE_TPARMLIST(NODE) TREE_PURPOSE (TYPE_FIELDS (NODE)) +#define TEMPLATE_TYPE_IDX(NODE) TREE_INT_CST_LOW (TREE_VALUE (TYPE_FIELDS (NODE))) +#define TEMPLATE_TYPE_SET_INFO(NODE,P,I) \ + (TYPE_FIELDS (NODE) = build_tree_list (P, build_int_2 (I, 0))) +#define TEMPLATE_CONST_TPARMLIST(NODE) (*(tree*)&TREE_INT_CST_LOW(NODE)) +#define TEMPLATE_CONST_IDX(NODE) (TREE_INT_CST_HIGH(NODE)) +#define TEMPLATE_CONST_SET_INFO(NODE,P,I) \ + (TEMPLATE_CONST_TPARMLIST (NODE) = saved_parmlist, \ + TEMPLATE_CONST_IDX (NODE) = I) + +/* in cp-lex.c */ +/* Indexed by TREE_CODE, these tables give C-looking names to + operators represented by TREE_CODES. For example, + opname_tab[(int) MINUS_EXPR] == "-". */ +extern char **opname_tab, **assignop_tab; + +/* in c-common.c */ +extern tree convert_and_check PROTO((tree, tree)); +extern void overflow_warning PROTO((tree)); +extern void unsigned_conversion_warning PROTO((tree, tree)); + +/* in cp-call.c */ +extern struct candidate *ansi_c_bullshit; + +extern int rank_for_overload PROTO((struct candidate *, struct candidate *)); +extern void compute_conversion_costs PROTO((tree, tree, struct candidate *, int)); +extern int get_arglist_len_in_bytes PROTO((tree)); +extern tree build_vfield_ref PROTO((tree, tree)); +extern tree find_scoped_type PROTO((tree, tree, tree)); +extern tree resolve_scope_to_name PROTO((tree, tree)); +extern tree build_scoped_method_call PROTO((tree, tree, tree, tree)); +extern tree build_method_call PROTO((tree, tree, tree, tree, int)); +extern tree build_overload_call_real PROTO((tree, tree, int, struct candidate *, int)); +extern tree build_overload_call PROTO((tree, tree, int, struct candidate *)); +extern tree build_overload_call_maybe PROTO((tree, tree, int, struct candidate *)); + +/* in cp-class.c */ +extern tree build_vbase_pointer PROTO((tree, tree)); +extern tree build_vbase_path PROTO((enum tree_code, tree, tree, tree, int)); +extern tree build_vtable_entry PROTO((tree, tree)); +extern tree build_vfn_ref PROTO((tree *, tree, tree)); +extern void add_method PROTO((tree, tree *, tree)); +extern void duplicate_tag_error PROTO((tree)); +extern tree finish_struct PROTO((tree, tree, int)); +extern int resolves_to_fixed_type_p PROTO((tree, int *)); +extern void init_class_processing PROTO((void)); +extern void pushclass PROTO((tree, int)); +extern void popclass PROTO((int)); +extern void push_nested_class PROTO((tree, int)); +extern void pop_nested_class PROTO((int)); +extern void push_lang_context PROTO((tree)); +extern void pop_lang_context PROTO((void)); +extern int root_lang_context_p PROTO((void)); +extern tree instantiate_type PROTO((tree, tree, int)); +extern void print_class_statistics PROTO((void)); +extern void maybe_push_cache_obstack PROTO((void)); + +/* in cp-cvt.c */ +extern tree convert_to_reference PROTO((tree, tree, tree, tree, int, char *, int, int)); +extern tree convert_from_reference PROTO((tree)); +extern tree convert_to_aggr PROTO((tree, tree, char **, int)); +extern tree convert_pointer_to PROTO((tree, tree)); +extern tree convert_pointer_to_real PROTO((tree, tree)); +extern tree convert_pointer_to_vbase PROTO((tree, tree)); +extern tree convert PROTO((tree, tree)); +extern tree convert_force PROTO((tree, tree)); +extern tree build_type_conversion PROTO((enum tree_code, tree, tree, int)); +extern int build_default_binary_type_conversion PROTO((enum tree_code, tree *, tree *)); +extern int build_default_unary_type_conversion PROTO((enum tree_code, tree *)); + +/* cp-decl.c */ +extern int global_bindings_p PROTO((void)); +extern void keep_next_level PROTO((void)); +extern int kept_level_p PROTO((void)); +extern void declare_parm_level PROTO((void)); +extern void declare_implicit_exception PROTO((void)); +extern int have_exceptions_p PROTO((void)); +extern void declare_uninstantiated_type_level PROTO((void)); +extern int uninstantiated_type_level_p PROTO((void)); +extern void declare_pseudo_global_level PROTO((void)); +extern int pseudo_global_level_p PROTO((void)); +extern void pushlevel PROTO((int)); +extern void pushlevel_temporary PROTO((int)); +extern tree poplevel PROTO((int, int, int)); +extern void delete_block PROTO((tree)); +extern void insert_block PROTO((tree)); +extern void add_block_current_level PROTO((tree)); +extern void set_block PROTO((tree)); +extern void pushlevel_class PROTO((void)); +extern tree poplevel_class PROTO((void)); +/* skip print_other_binding_stack and print_binding_level */ +extern void print_binding_stack PROTO((void)); +extern void push_to_top_level PROTO((void)); +extern void pop_from_top_level PROTO((void)); +extern void set_identifier_type_value PROTO((tree, tree)); +extern tree make_type_decl PROTO((tree, tree)); +extern void pushtag PROTO((tree, tree, int)); +extern tree make_anon_name PROTO((void)); +extern void clear_anon_tags PROTO((void)); +extern tree pushdecl PROTO((tree)); +extern tree pushdecl_top_level PROTO((tree)); +extern void push_class_level_binding PROTO((tree, tree)); +extern void push_overloaded_decl_top_level PROTO((tree, int)); +extern tree pushdecl_class_level PROTO((tree)); +extern int overloaded_globals_p PROTO((tree)); +extern tree push_overloaded_decl PROTO((tree, int)); +extern tree implicitly_declare PROTO((tree)); +extern tree lookup_label PROTO((tree)); +extern tree shadow_label PROTO((tree)); +extern tree define_label PROTO((char *, int, tree)); +extern void define_case_label PROTO((tree)); +extern tree getdecls PROTO((void)); +extern tree gettags PROTO((void)); +extern void set_current_level_tags_transparency PROTO((int)); +extern tree typedecl_for_tag PROTO((tree)); +extern tree lookup_name PROTO((tree, int)); +extern tree lookup_name_current_level PROTO((tree)); +extern void init_decl_processing PROTO((void)); +/* skipped define_function */ +extern void shadow_tag PROTO((tree)); +extern void grok_ctor_properties PROTO((tree, tree)); +extern tree groktypename PROTO((tree)); +extern tree start_decl PROTO((tree, tree, int, tree)); +extern void finish_decl PROTO((tree, tree, tree, int)); +extern void expand_static_init PROTO((tree, tree)); +extern int complete_array_type PROTO((tree, tree, int)); +extern tree build_ptrmemfunc_type PROTO((tree)); +extern tree grokdeclarator (); /* PROTO((tree, tree, enum decl_context, int, tree)); */ +extern tree xref_defn_tag PROTO((tree, tree, tree)); +extern tree xref_tag PROTO((tree, tree, tree, int)); +extern tree start_enum PROTO((tree)); +extern tree finish_enum PROTO((tree, tree)); +extern tree build_enumerator PROTO((tree, tree)); +extern tree grok_enum_decls PROTO((tree, tree)); +extern int start_function PROTO((tree, tree, tree, int)); +extern void store_parm_decls PROTO((void)); +extern void store_return_init PROTO((tree, tree)); +extern void finish_function PROTO((int, int)); +extern tree start_method PROTO((tree, tree, tree)); +extern tree finish_method PROTO((tree)); +extern void hack_incomplete_structures PROTO((tree)); +extern tree maybe_build_cleanup PROTO((tree)); +extern void cplus_expand_expr_stmt PROTO((tree)); +extern void finish_stmt PROTO((void)); +extern void pop_implicit_try_blocks PROTO((tree)); +extern void push_exception_cleanup PROTO((tree)); +extern void revert_static_member_fn PROTO((tree *, tree *, tree *)); + +/* in cp-decl2.c */ +extern int lang_decode_option PROTO((char *)); +extern tree grok_method_quals PROTO((tree, tree, tree)); +extern void grokclassfn PROTO((tree, tree, tree, enum overload_flags, tree)); +extern tree grok_alignof PROTO((tree)); +extern tree grok_array_decl PROTO((tree, tree)); +extern tree delete_sanity PROTO((tree, tree, int, int)); +extern void check_classfn PROTO((tree, tree, tree)); +extern tree grokfield PROTO((tree, tree, tree, tree, tree)); +extern tree grokbitfield PROTO((tree, tree, tree)); +extern tree groktypefield PROTO((tree, tree)); +extern tree grokoptypename PROTO((tree, int)); +extern tree build_push_scope PROTO((tree, tree)); +extern tree constructor_name_full PROTO((tree)); +extern tree constructor_name PROTO((tree)); +extern void setup_vtbl_ptr PROTO((void)); +extern void mark_inline_for_output PROTO((tree)); +extern void clear_temp_name PROTO((void)); +extern tree get_temp_name PROTO((tree, int)); +extern tree get_temp_regvar PROTO((tree, tree)); +extern void finish_anon_union PROTO((tree)); +extern tree finish_table PROTO((tree, tree, tree, int)); +extern void finish_builtin_type PROTO((tree, char *, tree *, int, tree)); +extern tree coerce_new_type PROTO((tree)); +extern tree coerce_delete_type PROTO((tree)); +extern void walk_vtables PROTO((void (*)(), void (*)())); +extern void finish_file PROTO((void)); +extern void warn_if_unknown_interface PROTO((void)); +extern tree grok_x_components PROTO((tree, tree)); + +/* in cp-edsel.c */ + +/* in cp-except.c */ +extern tree lookup_exception_cname PROTO((tree, tree, tree)); +extern tree lookup_exception_tname PROTO((tree)); +extern tree lookup_exception_object PROTO((tree, tree, int)); +extern tree lookup_exception_type PROTO((tree, tree, tree)); +extern tree finish_exception PROTO((tree, tree)); +extern void finish_exception_decl PROTO((tree, tree)); +extern void end_exception_decls PROTO((void)); +extern void cplus_expand_start_try PROTO((int)); +extern tree cplus_expand_end_try PROTO((int)); +extern void cplus_expand_start_except PROTO((tree, tree)); +extern void cplus_expand_end_except PROTO((tree)); +extern void cplus_expand_raise PROTO((tree, tree, tree, int)); +extern tree ansi_exception_object_lookup PROTO((tree)); +extern void cplus_expand_throw PROTO((tree)); +extern tree cplus_expand_start_catch PROTO((tree)); +extern tree ansi_expand_start_catch PROTO((tree)); +extern void cplus_expand_end_catch PROTO((int)); +extern void cplus_expand_reraise PROTO((tree)); +extern void setup_exception_throw_decl PROTO((void)); +extern void init_exception_processing PROTO((void)); +extern void init_exception_processing_1 PROTO((void)); + +/* in cp-expr.c */ +/* skip cplus_expand_expr */ +extern void init_cplus_expand PROTO((void)); +extern void fixup_result_decl PROTO((tree, struct rtx_def *)); +extern int decl_in_memory_p PROTO((tree)); + +/* in cp-gc.c */ +extern int type_needs_gc_entry PROTO((tree)); +extern int value_safe_from_gc PROTO((tree, tree)); +extern void build_static_gc_entry PROTO((tree, tree)); +extern tree protect_value_from_gc PROTO((tree, tree)); +extern tree build_headof PROTO((tree)); +extern tree build_classof PROTO((tree)); +extern tree build_t_desc PROTO((tree, int)); +extern tree build_i_desc PROTO((tree)); +extern tree build_m_desc PROTO((tree)); +extern void expand_gc_prologue_and_epilogue PROTO((void)); +extern void lang_expand_end_bindings PROTO((struct rtx_def *, struct rtx_def *)); +extern void init_gc_processing PROTO((void)); +extern tree build_typeid PROTO((tree)); +extern tree get_typeid PROTO((tree)); +extern tree build_dynamic_cast PROTO((tree, tree)); + +/* in cp-init.c */ +extern void emit_base_init PROTO((tree, int)); +extern void check_base_init PROTO((tree)); +extern tree build_virtual_init PROTO((tree, tree, tree)); +extern void init_vtbl_ptrs PROTO((tree, int, int)); +extern void do_member_init PROTO((tree, tree, tree)); +extern void expand_member_init PROTO((tree, tree, tree)); +extern void expand_aggr_init PROTO((tree, tree, int)); +extern int is_aggr_typedef PROTO((tree, int)); +extern tree get_aggr_from_typedef PROTO((tree, int)); +extern tree get_type_value PROTO((tree)); +extern tree build_member_call PROTO((tree, tree, tree)); +extern tree build_offset_ref PROTO((tree, tree)); +extern tree get_member_function PROTO((tree *, tree, tree)); +extern tree get_member_function_from_ptrfunc PROTO((tree *, tree, tree)); +extern tree resolve_offset_ref PROTO((tree)); +extern tree decl_constant_value PROTO((tree)); +extern int is_friend_type PROTO((tree, tree)); +extern int is_friend PROTO((tree, tree)); +extern void make_friend_class PROTO((tree, tree)); +extern tree do_friend PROTO((tree, tree, tree, tree, enum overload_flags, tree)); +extern void embrace_waiting_friends PROTO((tree)); +extern tree build_builtin_call PROTO((tree, tree, tree)); +extern tree build_new PROTO((tree, tree, tree, int)); +extern tree expand_vec_init PROTO((tree, tree, tree, tree, int)); +extern tree build_x_delete PROTO((tree, tree, int, tree)); +extern tree build_delete PROTO((tree, tree, tree, int, int)); +extern tree build_vbase_delete PROTO((tree, tree)); +extern tree build_vec_delete PROTO((tree, tree, tree, tree, tree, tree)); + +/* in cp-input.c */ + +/* in cp-lex.c */ +extern tree make_pointer_declarator PROTO((tree, tree)); +extern tree make_reference_declarator PROTO((tree, tree)); +extern char *operator_name_string PROTO((tree)); +extern void lang_init PROTO((void)); +extern void lang_finish PROTO((void)); +extern void init_filename_times PROTO((void)); +extern void reinit_lang_specific PROTO((void)); +extern void init_lex PROTO((void)); +extern void reinit_parse_for_function PROTO((void)); +extern int *init_parse PROTO((void)); +extern void print_parse_statistics PROTO((void)); +extern void extract_interface_info PROTO((void)); +extern void set_vardecl_interface_info PROTO((tree, tree)); +extern void do_pending_inlines PROTO((void)); +extern void process_next_inline PROTO((tree)); +/* skip restore_pending_input */ +extern void yyungetc PROTO((int, int)); +extern void reinit_parse_for_method PROTO((int, tree)); +#if 0 +extern void reinit_parse_for_block PROTO((int, struct obstack *, int)); +#endif +extern tree cons_up_default_function PROTO((tree, tree, tree, int)); +extern void check_for_missing_semicolon PROTO((tree)); +extern void note_got_semicolon PROTO((tree)); +extern void note_list_got_semicolon PROTO((tree)); +extern int check_newline PROTO((void)); +extern void dont_see_typename PROTO((void)); +extern int identifier_type PROTO((tree)); +extern void see_typename PROTO((void)); +extern tree do_identifier PROTO((tree)); +extern tree identifier_typedecl_value PROTO((tree)); +extern int real_yylex PROTO((void)); +extern tree build_lang_decl PROTO((enum tree_code, tree, tree)); +extern tree build_lang_field_decl PROTO((enum tree_code, tree, tree)); +extern void copy_lang_decl PROTO((tree)); +extern tree make_lang_type PROTO((enum tree_code)); +extern void copy_decl_lang_specific PROTO((tree)); +extern void dump_time_statistics PROTO((void)); +/* extern void compiler_error PROTO((char *, HOST_WIDE_INT, HOST_WIDE_INT)); */ +extern void compiler_error_with_decl PROTO((tree, char *)); +extern void yyerror PROTO((char *)); + +/* in cp-error.c */ +extern void init_error PROTO((void)); +extern char *fndecl_as_string PROTO((tree, tree, int)); +extern char *type_as_string PROTO((tree, int)); +extern char *args_as_string PROTO((tree, int)); +extern char *decl_as_string PROTO((tree, int)); +extern char *expr_as_string PROTO((tree, int)); +extern char *code_as_string PROTO((enum tree_code, int)); +extern char *language_as_string PROTO((enum languages, int)); +extern char *parm_as_string PROTO((int, int)); +extern char *op_as_string PROTO((enum tree_code, int)); + +/* in cp-method.c */ +extern void init_method PROTO((void)); +extern tree make_anon_parm_name PROTO((void)); +extern void clear_anon_parm_name PROTO((void)); +extern void do_inline_function_hair PROTO((tree, tree)); +/* skip report_type_mismatch */ +extern char *build_overload_name PROTO((tree, int, int)); +extern tree cplus_exception_name PROTO((tree)); +extern tree build_decl_overload PROTO((tree, tree, int)); +extern tree build_typename_overload PROTO((tree)); +extern tree build_t_desc_overload PROTO((tree)); +extern void declare_overloaded PROTO((tree)); +#ifdef NO_AUTO_OVERLOAD +extern int is_overloaded PROTO((tree)); +#endif +extern tree build_opfncall PROTO((enum tree_code, int, tree, tree, tree)); +extern tree hack_identifier PROTO((tree, tree, int)); +extern tree build_component_type_expr PROTO((tree, tree, tree, int)); + +/* in cp-pt.c */ +extern void begin_template_parm_list PROTO((void)); +extern tree process_template_parm PROTO((tree, tree)); +extern tree end_template_parm_list PROTO((tree)); +extern void end_template_decl PROTO((tree, tree, tree)); +extern tree lookup_template_class PROTO((tree, tree, tree)); +extern void push_template_decls PROTO((tree, tree, int)); +extern void pop_template_decls PROTO((tree, tree, int)); +extern int uses_template_parms PROTO((tree)); +extern void instantiate_member_templates PROTO((tree)); +extern tree instantiate_class_template PROTO((tree, int)); +extern tree instantiate_template PROTO((tree, tree *)); +extern void undo_template_name_overload PROTO((tree, int)); +extern void overload_template_name PROTO((tree, int)); +extern void end_template_instantiation PROTO((tree)); +extern void reinit_parse_for_template PROTO((int, tree, tree)); +extern int type_unification PROTO((tree, tree *, tree, tree, int *, int)); +extern int do_pending_expansions PROTO((void)); +extern void do_pending_templates PROTO((void)); +struct tinst_level *tinst_for_decl PROTO((void)); +extern void do_function_instantiation PROTO((tree, tree)); + +/* in cp-search.c */ +extern tree make_memoized_table_entry PROTO((tree, tree, int)); +extern void push_memoized_context PROTO((tree, int)); +extern void pop_memoized_context PROTO((int)); +extern tree get_binfo PROTO((tree, tree, int)); +extern int get_base_distance PROTO((tree, tree, int, tree *)); +extern enum access_type check_access PROTO((tree, tree)); +extern tree lookup_field PROTO((tree, tree, int, int)); +extern tree lookup_nested_field PROTO((tree, int)); +extern tree lookup_fnfields PROTO((tree, tree, int)); +extern HOST_WIDE_INT breadth_first_search PROTO((tree, int (*)(), int (*)())); +extern int tree_needs_constructor_p PROTO((tree, int)); +extern int tree_has_any_destructor_p PROTO((tree, int)); +extern tree get_first_matching_virtual PROTO((tree, tree, int)); +extern tree get_abstract_virtuals PROTO((tree)); +extern tree get_baselinks PROTO((tree, tree, tree)); +extern tree next_baselink PROTO((tree)); +extern tree init_vbase_pointers PROTO((tree, tree)); +extern tree build_vbase_vtables_init PROTO((tree, tree, tree, tree, int)); +extern void clear_search_slots PROTO((tree)); +extern tree get_vbase_types PROTO((tree)); +extern void build_mi_matrix PROTO((tree)); +extern void free_mi_matrix PROTO((void)); +extern void build_mi_virtuals PROTO((int, int)); +extern void add_mi_virtuals PROTO((int, tree)); +extern void report_ambiguous_mi_virtuals PROTO((int, tree)); +extern void note_debug_info_needed PROTO((tree)); +extern void push_class_decls PROTO((tree)); +extern void pop_class_decls PROTO((tree)); +extern void unuse_fields PROTO((tree)); +extern void unmark_finished_struct PROTO((tree)); +extern void print_search_statistics PROTO((void)); +extern void init_search_processing PROTO((void)); +extern void reinit_search_statistics PROTO((void)); +extern tree current_scope PROTO((void)); + +/* in cp-sig.c */ +extern tree build_signature_pointer_type PROTO((tree, int, int)); +extern tree build_signature_reference_type PROTO((tree, int, int)); +extern tree build_signature_pointer_constructor PROTO((tree, tree)); +extern tree build_signature_method_call PROTO((tree, tree, tree, tree)); +extern tree build_optr_ref PROTO((tree)); +extern tree build_sptr_ref PROTO((tree)); +extern tree build_vptr_ref PROTO((tree)); + +/* in cp-spew.c */ +extern void init_spew PROTO((void)); +extern int yylex PROTO((void)); +extern tree arbitrate_lookup PROTO((tree, tree, tree)); + +/* in cp-tree.c */ +extern int lvalue_p PROTO((tree)); +extern int lvalue_or_else PROTO((tree, char *)); +extern tree build_cplus_new PROTO((tree, tree, int)); +extern tree break_out_cleanups PROTO((tree)); +extern tree break_out_calls PROTO((tree)); +extern tree build_cplus_method_type PROTO((tree, tree, tree)); +extern tree build_cplus_staticfn_type PROTO((tree, tree, tree)); +extern tree build_cplus_array_type PROTO((tree, tree)); +extern void propagate_binfo_offsets PROTO((tree, tree)); +extern int layout_vbasetypes PROTO((tree, int)); +extern tree layout_basetypes PROTO((tree, tree)); +extern int list_hash PROTO((tree)); +extern tree list_hash_lookup PROTO((int, tree)); +extern void list_hash_add PROTO((int, tree)); +extern tree list_hash_canon PROTO((int, tree)); +extern tree hash_tree_cons PROTO((int, int, int, tree, tree, tree)); +extern tree hash_tree_chain PROTO((tree, tree)); +extern tree hash_chainon PROTO((tree, tree)); +extern tree get_decl_list PROTO((tree)); +extern tree list_hash_lookup_or_cons PROTO((tree)); +extern tree make_binfo PROTO((tree, tree, tree, tree, tree)); +extern tree copy_binfo PROTO((tree)); +extern tree binfo_value PROTO((tree, tree)); +extern tree reverse_path PROTO((tree)); +extern tree virtual_member PROTO((tree, tree)); +extern tree virtual_offset PROTO((tree, tree, tree)); +extern void debug_binfo PROTO((tree)); +extern int decl_list_length PROTO((tree)); +extern tree decl_value_member PROTO((tree, tree)); +extern int is_overloaded_fn PROTO((tree)); +extern tree get_first_fn PROTO((tree)); +extern tree fnaddr_from_vtable_entry PROTO((tree)); +extern void set_fnaddr_from_vtable_entry PROTO((tree, tree)); +extern tree function_arg_chain PROTO((tree)); +extern int promotes_to_aggr_type PROTO((tree, enum tree_code)); +extern int is_aggr_type_2 PROTO((tree, tree)); +extern void message_2_types PROTO((void (*)(), char *, tree, tree)); +extern char *lang_printable_name PROTO((tree)); +extern tree build_exception_variant PROTO((tree, tree, tree)); +extern tree copy_to_permanent PROTO((tree)); +extern void print_lang_statistics PROTO((void)); +/* skip __eprintf */ +extern tree array_type_nelts_total PROTO((tree)); +extern tree array_type_nelts_top PROTO((tree)); + +/* in cp-typeck.c */ +extern tree target_type PROTO((tree)); +extern tree require_complete_type PROTO((tree)); +extern int type_unknown_p PROTO((tree)); +extern int fntype_p PROTO((tree)); +extern tree require_instantiated_type PROTO((tree, tree, tree)); +extern tree commonparms PROTO((tree, tree)); +extern tree common_type PROTO((tree, tree)); +extern int compexcepttypes PROTO((tree, tree, int)); +extern int comptypes PROTO((tree, tree, int)); +extern int comp_target_types PROTO((tree, tree, int)); +extern tree common_base_types PROTO((tree, tree)); +extern int compparms PROTO((tree, tree, int)); +extern int comp_target_types PROTO((tree, tree, int)); +extern tree unsigned_type PROTO((tree)); +extern tree signed_type PROTO((tree)); +extern tree signed_or_unsigned_type PROTO((int, tree)); +extern tree c_sizeof PROTO((tree)); +extern tree c_sizeof_nowarn PROTO((tree)); +extern tree c_alignof PROTO((tree)); +extern tree default_conversion PROTO((tree)); +extern tree build_object_ref PROTO((tree, tree, tree)); +extern tree build_component_ref_1 PROTO((tree, tree, int)); +extern tree build_component_ref PROTO((tree, tree, tree, int)); +extern tree build_x_indirect_ref PROTO((tree, char *)); +extern tree build_indirect_ref PROTO((tree, char *)); +extern tree build_x_array_ref PROTO((tree, tree)); +extern tree build_array_ref PROTO((tree, tree)); +extern tree build_x_function_call PROTO((tree, tree, tree)); +extern tree build_function_call_real PROTO((tree, tree, int, int)); +extern tree build_function_call PROTO((tree, tree)); +extern tree build_function_call_maybe PROTO((tree, tree)); +extern tree convert_arguments PROTO((tree, tree, tree, tree, int)); +extern tree build_x_binary_op PROTO((enum tree_code, tree, tree)); +extern tree build_binary_op PROTO((enum tree_code, tree, tree, int)); +extern tree build_binary_op_nodefault PROTO((enum tree_code, tree, tree, enum tree_code)); +extern tree build_component_addr PROTO((tree, tree, char *)); +extern tree build_x_unary_op PROTO((enum tree_code, tree)); +extern tree build_unary_op PROTO((enum tree_code, tree, int)); +extern tree unary_complex_lvalue PROTO((enum tree_code, tree)); +extern int mark_addressable PROTO((tree)); +extern tree build_x_conditional_expr PROTO((tree, tree, tree)); +extern tree build_conditional_expr PROTO((tree, tree, tree)); +extern tree build_x_compound_expr PROTO((tree)); +extern tree build_compound_expr PROTO((tree)); +extern tree build_c_cast PROTO((tree, tree)); +extern tree build_modify_expr PROTO((tree, enum tree_code, tree)); +extern int language_lvalue_valid PROTO((tree)); +extern void warn_for_assignment PROTO((char *, char *, char *, tree, int, int)); +extern tree convert_for_initialization PROTO((tree, tree, tree, int, char *, tree, int)); +extern void c_expand_asm_operands PROTO((tree, tree, tree, tree, int, char *, int)); +extern void c_expand_return PROTO((tree)); +extern tree c_expand_start_case PROTO((tree)); +extern tree build_component_ref PROTO((tree, tree, tree, int)); +extern tree build_ptrmemfunc PROTO((tree, tree, int)); + +/* in cp-type2.c */ +extern tree error_not_base_type PROTO((tree, tree)); +extern tree binfo_or_else PROTO((tree, tree)); +extern void error_with_aggr_type (); /* PROTO((tree, char *, HOST_WIDE_INT)); */ +extern void readonly_error PROTO((tree, char *, int)); +extern void abstract_virtuals_error PROTO((tree, tree)); +extern void incomplete_type_error PROTO((tree, tree)); +extern void my_friendly_abort PROTO((int)); +extern void my_friendly_assert PROTO((int, int)); +extern tree store_init_value PROTO((tree, tree)); +extern tree digest_init PROTO((tree, tree, tree *)); +extern tree build_scoped_ref PROTO((tree, tree)); +extern tree build_x_arrow PROTO((tree)); +extern tree build_m_component_ref PROTO((tree, tree)); +extern tree build_functional_cast PROTO((tree, tree)); +extern char *enum_name_string PROTO((tree, tree)); +extern void report_case_error PROTO((int, tree, tree, tree)); + +/* in cp-xref.c */ +extern void GNU_xref_begin PROTO((char *)); +extern void GNU_xref_end PROTO((int)); +extern void GNU_xref_file PROTO((char *)); +extern void GNU_xref_start_scope PROTO((HOST_WIDE_INT)); +extern void GNU_xref_end_scope PROTO((HOST_WIDE_INT, HOST_WIDE_INT, int, int, int)); +extern void GNU_xref_def PROTO((tree, char *)); +extern void GNU_xref_decl PROTO((tree, tree)); +extern void GNU_xref_call PROTO((tree, char *)); +extern void GNU_xref_function PROTO((tree, tree)); +extern void GNU_xref_assign PROTO((tree)); +extern void GNU_xref_hier PROTO((char *, char *, int, int, int)); +extern void GNU_xref_member PROTO((tree, tree)); + +/* -- end of C++ */ + +#endif /* not _CP_TREE_H */ diff --git a/gcc/cp/cvt.c b/gcc/cp/cvt.c new file mode 100644 index 0000000..347a901 --- /dev/null +++ b/gcc/cp/cvt.c @@ -0,0 +1,1997 @@ +/* Language-level data type conversion for GNU C++. + Copyright (C) 1987, 1988, 1992, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This file contains the functions for converting C expressions + to different data types. The only entry point is `convert'. + Every language front end must have a `convert' function + but what kind of conversions it does will depend on the language. */ + +#include "config.h" +#include "tree.h" +#include "flags.h" +#include "cp-tree.h" +#include "class.h" +#include "convert.h" + +#undef NULL +#define NULL (char *)0 + +/* Change of width--truncation and extension of integers or reals-- + is represented with NOP_EXPR. Proper functioning of many things + assumes that no other conversions can be NOP_EXPRs. + + Conversion between integer and pointer is represented with CONVERT_EXPR. + Converting integer to real uses FLOAT_EXPR + and real to integer uses FIX_TRUNC_EXPR. + + Here is a list of all the functions that assume that widening and + narrowing is always done with a NOP_EXPR: + In convert.c, convert_to_integer. + In c-typeck.c, build_binary_op_nodefault (boolean ops), + and truthvalue_conversion. + In expr.c: expand_expr, for operands of a MULT_EXPR. + In fold-const.c: fold. + In tree.c: get_narrower and get_unwidened. + + C++: in multiple-inheritance, converting between pointers may involve + adjusting them by a delta stored within the class definition. */ + +/* Subroutines of `convert'. */ + +/* Build a thunk. What it is, is an entry point that when called will + adjust the this pointer (the first argument) by offset, and then + goto the real address of the function given by REAL_ADDR that we + would like called. What we return is the address of the thunk. */ +static tree +build_thunk (offset, real_addr) + tree offset, real_addr; +{ + if (TREE_CODE (real_addr) != ADDR_EXPR + || TREE_CODE (TREE_OPERAND (real_addr, 0)) != FUNCTION_DECL) + { + sorry ("MI pointer to member conversion too complex"); + return error_mark_node; + } + sorry ("MI pointer to member conversion too complex"); + return error_mark_node; +} + +/* Convert a `pointer to member' (POINTER_TYPE to METHOD_TYPE) into + another `pointer to method'. This may involved the creation of + a thunk to handle the this offset calculation. */ +static tree +convert_fn_ptr (type, expr) + tree type, expr; +{ + tree binfo = get_binfo (TYPE_METHOD_BASETYPE (TREE_TYPE (TREE_TYPE (expr))), + TYPE_METHOD_BASETYPE (TREE_TYPE (type)), + 1); + if (binfo == error_mark_node) + { + error (" in pointer to member conversion"); + return error_mark_node; + } + if (binfo == NULL_TREE) + { + /* ARM 4.8 restriction. */ + error ("invalid pointer to member conversion"); + return error_mark_node; + } + if (BINFO_OFFSET_ZEROP (binfo)) + return build1 (NOP_EXPR, type, expr); + return build1 (NOP_EXPR, type, build_thunk (BINFO_OFFSET (binfo), expr)); +} + +/* if converting pointer to pointer + if dealing with classes, check for derived->base or vice versa + else if dealing with method pointers, delegate + else convert blindly + else if converting class, pass off to build_type_conversion + else try C-style pointer conversion */ +static tree +cp_convert_to_pointer (type, expr) + tree type, expr; +{ + register tree intype = TREE_TYPE (expr); + register enum tree_code form = TREE_CODE (intype); + + if (form == POINTER_TYPE) + { + intype = TYPE_MAIN_VARIANT (intype); + + if (TYPE_MAIN_VARIANT (type) != intype + && TREE_CODE (TREE_TYPE (type)) == RECORD_TYPE + && TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE) + { + enum tree_code code = PLUS_EXPR; + tree binfo = get_binfo (TREE_TYPE (type), TREE_TYPE (intype), 1); + if (binfo == error_mark_node) + return error_mark_node; + if (binfo == NULL_TREE) + { + binfo = get_binfo (TREE_TYPE (intype), TREE_TYPE (type), 1); + if (binfo == error_mark_node) + return error_mark_node; + code = MINUS_EXPR; + } + if (binfo) + { + if (TYPE_USES_VIRTUAL_BASECLASSES (TREE_TYPE (type)) + || TYPE_USES_VIRTUAL_BASECLASSES (TREE_TYPE (intype)) + || ! BINFO_OFFSET_ZEROP (binfo)) + { + /* Need to get the path we took. */ + tree path; + + if (code == PLUS_EXPR) + get_base_distance (TREE_TYPE (type), TREE_TYPE (intype), 0, &path); + else + get_base_distance (TREE_TYPE (intype), TREE_TYPE (type), 0, &path); + return build_vbase_path (code, type, expr, path, 0); + } + } + } + if (TYPE_MAIN_VARIANT (type) != intype + && TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE + && TREE_CODE (type) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (intype)) == METHOD_TYPE) + return convert_fn_ptr (type, expr); + + return build1 (NOP_EXPR, type, expr); + } + + my_friendly_assert (form != OFFSET_TYPE, 186); + + if (TYPE_LANG_SPECIFIC (intype) + && (IS_SIGNATURE_POINTER (intype) || IS_SIGNATURE_REFERENCE (intype))) + return convert_to_pointer (type, build_optr_ref (expr)); + + if (IS_AGGR_TYPE (intype)) + { + tree rval; + rval = build_type_conversion (CONVERT_EXPR, type, expr, 1); + if (rval) + { + if (rval == error_mark_node) + cp_error ("conversion of `%E' from `%T' to `%T' is ambiguous", + expr, intype, type); + return rval; + } + } + + if (integer_zerop (expr)) + { + if (type == TREE_TYPE (null_pointer_node)) + return null_pointer_node; + expr = build_int_2 (0, 0); + TREE_TYPE (expr) = type; + return expr; + } + + if (form == INTEGER_TYPE || form == ENUMERAL_TYPE) + { + if (type_precision (intype) == POINTER_SIZE) + return build1 (CONVERT_EXPR, type, expr); + expr = convert (type_for_size (POINTER_SIZE, 0), expr); + /* Modes may be different but sizes should be the same. */ + if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (expr))) + != GET_MODE_SIZE (TYPE_MODE (type))) + /* There is supposed to be some integral type + that is the same width as a pointer. */ + abort (); + return convert_to_pointer (type, expr); + } + + cp_error ("cannot convert `%E' from type `%T' to type `%T'", + expr, intype, type); + return error_mark_node; +} + +/* Like convert, except permit conversions to take place which + are not normally allowed due to access restrictions + (such as conversion from sub-type to private super-type). */ +static tree +convert_to_pointer_force (type, expr) + tree type, expr; +{ + register tree intype = TREE_TYPE (expr); + register enum tree_code form = TREE_CODE (intype); + + if (integer_zerop (expr)) + { + if (type == TREE_TYPE (null_pointer_node)) + return null_pointer_node; + expr = build_int_2 (0, 0); + TREE_TYPE (expr) = type; + return expr; + } + + /* Convert signature pointer/reference to `void *' first. */ + if (form == RECORD_TYPE + && (IS_SIGNATURE_POINTER (intype) || IS_SIGNATURE_REFERENCE (intype))) + { + expr = build_optr_ref (expr); + intype = TREE_TYPE (expr); + form = TREE_CODE (intype); + } + + if (form == POINTER_TYPE) + { + intype = TYPE_MAIN_VARIANT (intype); + + if (TYPE_MAIN_VARIANT (type) != intype + && TREE_CODE (TREE_TYPE (type)) == RECORD_TYPE + && TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE) + { + enum tree_code code = PLUS_EXPR; + tree path; + int distance = get_base_distance (TREE_TYPE (type), + TREE_TYPE (intype), 0, &path); + if (distance == -2) + { + ambig: + cp_error ("type `%T' is ambiguous baseclass of `%s'", TREE_TYPE (type), + TYPE_NAME_STRING (TREE_TYPE (intype))); + return error_mark_node; + } + if (distance == -1) + { + distance = get_base_distance (TREE_TYPE (intype), + TREE_TYPE (type), 0, &path); + if (distance == -2) + goto ambig; + if (distance < 0) + /* Doesn't need any special help from us. */ + return build1 (NOP_EXPR, type, expr); + + code = MINUS_EXPR; + } + return build_vbase_path (code, type, expr, path, 0); + } + return build1 (NOP_EXPR, type, expr); + } + + return cp_convert_to_pointer (type, expr); +} + +/* We are passing something to a function which requires a reference. + The type we are interested in is in TYPE. The initial + value we have to begin with is in ARG. + + FLAGS controls how we manage access checking. + CHECKCONST controls if we report error messages on const subversion. */ +static tree +build_up_reference (type, arg, flags, checkconst) + tree type, arg; + int flags, checkconst; +{ + tree rval, targ; + int literal_flag = 0; + tree argtype = TREE_TYPE (arg), basetype = argtype; + tree target_type = TREE_TYPE (type); + tree binfo = NULL_TREE; + + my_friendly_assert (TREE_CODE (type) == REFERENCE_TYPE, 187); + if (flags != 0 + && TYPE_MAIN_VARIANT (argtype) != TYPE_MAIN_VARIANT (target_type) + && IS_AGGR_TYPE (argtype) + && IS_AGGR_TYPE (target_type)) + { + binfo = get_binfo (target_type, argtype, 1); + if ((flags & LOOKUP_PROTECT) && binfo == error_mark_node) + return error_mark_node; + if (binfo == NULL_TREE) + return error_not_base_type (target_type, argtype); + basetype = BINFO_TYPE (binfo); + } + + /* Pass along const and volatile down into the type. */ + if (TYPE_READONLY (type) || TYPE_VOLATILE (type)) + target_type = build_type_variant (target_type, TYPE_READONLY (type), + TYPE_VOLATILE (type)); + targ = arg; + if (TREE_CODE (targ) == SAVE_EXPR) + targ = TREE_OPERAND (targ, 0); + + switch (TREE_CODE (targ)) + { + case INDIRECT_REF: + /* This is a call to a constructor which did not know what it was + initializing until now: it needs to initialize a temporary. */ + if (TREE_HAS_CONSTRUCTOR (targ)) + { + tree temp = build_cplus_new (argtype, TREE_OPERAND (targ, 0), 1); + TREE_HAS_CONSTRUCTOR (targ) = 0; + return build_up_reference (type, temp, flags, 1); + } + /* Let &* cancel out to simplify resulting code. + Also, throw away intervening NOP_EXPRs. */ + arg = TREE_OPERAND (targ, 0); + if (TREE_CODE (arg) == NOP_EXPR || TREE_CODE (arg) == NON_LVALUE_EXPR + || (TREE_CODE (arg) == CONVERT_EXPR && TREE_REFERENCE_EXPR (arg))) + arg = TREE_OPERAND (arg, 0); + + /* in doing a &*, we have to get rid of the const'ness on the pointer + value. Haven't thought about volatile here. Pointers come to mind + here. */ + if (TREE_READONLY (arg)) + { + arg = copy_node (arg); + TREE_READONLY (arg) = 0; + } + + rval = build1 (CONVERT_EXPR, type, arg); + TREE_REFERENCE_EXPR (rval) = 1; + + /* propagate the const flag on something like: + + class Base { + public: + int foo; + }; + + class Derived : public Base { + public: + int bar; + }; + + void func(Base&); + + void func2(const Derived& d) { + func(d); + } + + on the d parameter. The below could have been avoided, if the flags + were down in the tree, not sure why they are not. (mrs) */ + /* The below code may have to be propagated to other parts of this + switch. */ + if (TREE_READONLY (targ) && !TREE_READONLY (arg) + && (TREE_CODE (arg) == PARM_DECL || TREE_CODE (arg) == VAR_DECL) + && TREE_CODE (TREE_TYPE (arg)) == REFERENCE_TYPE + && (TYPE_READONLY (target_type) && checkconst)) + { + arg = copy_node (arg); + TREE_READONLY (arg) = TREE_READONLY (targ); + } + literal_flag = TREE_CONSTANT (arg); + + goto done_but_maybe_warn; + + /* Get this out of a register if we happened to be in one by accident. + Also, build up references to non-lvalues it we must. */ + /* For &x[y], return (&) x+y */ + case ARRAY_REF: + if (mark_addressable (TREE_OPERAND (targ, 0)) == 0) + return error_mark_node; + rval = build_binary_op (PLUS_EXPR, TREE_OPERAND (targ, 0), + TREE_OPERAND (targ, 1), 1); + TREE_TYPE (rval) = type; + if (TREE_CONSTANT (TREE_OPERAND (targ, 1)) + && staticp (TREE_OPERAND (targ, 0))) + TREE_CONSTANT (rval) = 1; + goto done; + + case SCOPE_REF: + /* Could be a reference to a static member. */ + { + tree field = TREE_OPERAND (targ, 1); + if (TREE_STATIC (field)) + { + rval = build1 (ADDR_EXPR, type, field); + literal_flag = 1; + goto done; + } + } + + /* We should have farmed out member pointers above. */ + my_friendly_abort (188); + + case COMPONENT_REF: + rval = build_component_addr (targ, build_pointer_type (argtype), + "attempt to make a reference to bit-field structure member `%s'"); + TREE_TYPE (rval) = type; + literal_flag = staticp (TREE_OPERAND (targ, 0)); + + goto done_but_maybe_warn; + + /* Anything not already handled and not a true memory reference + needs to have a reference built up. Do so silently for + things like integers and return values from function, + but complain if we need a reference to something declared + as `register'. */ + + case RESULT_DECL: + if (staticp (targ)) + literal_flag = 1; + TREE_ADDRESSABLE (targ) = 1; + put_var_into_stack (targ); + break; + + case PARM_DECL: + if (targ == current_class_decl) + { + error ("address of `this' not available"); +#if 0 + /* This code makes the following core dump the compiler on a sun4, + if the code below is used. + + class e_decl; + class a_decl; + typedef a_decl* a_ref; + + class a_s { + public: + a_s(); + void* append(a_ref& item); + }; + class a_decl { + public: + a_decl (e_decl *parent); + a_s generic_s; + a_s decls; + e_decl* parent; + }; + + class e_decl { + public: + e_decl(); + a_s implementations; + }; + + void foobar(void *); + + a_decl::a_decl(e_decl *parent) { + parent->implementations.append(this); + } + */ + + TREE_ADDRESSABLE (targ) = 1; /* so compiler doesn't die later */ + put_var_into_stack (targ); + break; +#else + return error_mark_node; +#endif + } + /* Fall through. */ + case VAR_DECL: + case CONST_DECL: + if (DECL_REGISTER (targ) && !TREE_ADDRESSABLE (targ)) + warning ("address needed to build reference for `%s', which is declared `register'", + IDENTIFIER_POINTER (DECL_NAME (targ))); + else if (staticp (targ)) + literal_flag = 1; + + TREE_ADDRESSABLE (targ) = 1; + put_var_into_stack (targ); + break; + + case COMPOUND_EXPR: + { + tree real_reference = build_up_reference (type, TREE_OPERAND (targ, 1), + LOOKUP_PROTECT, checkconst); + rval = build (COMPOUND_EXPR, type, TREE_OPERAND (targ, 0), real_reference); + TREE_CONSTANT (rval) = staticp (TREE_OPERAND (targ, 1)); + return rval; + } + + case MODIFY_EXPR: + case INIT_EXPR: + { + tree real_reference = build_up_reference (type, TREE_OPERAND (targ, 0), + LOOKUP_PROTECT, checkconst); + rval = build (COMPOUND_EXPR, type, arg, real_reference); + TREE_CONSTANT (rval) = staticp (TREE_OPERAND (targ, 0)); + return rval; + } + + case COND_EXPR: + return build (COND_EXPR, type, + TREE_OPERAND (targ, 0), + build_up_reference (type, TREE_OPERAND (targ, 1), + LOOKUP_PROTECT, checkconst), + build_up_reference (type, TREE_OPERAND (targ, 2), + LOOKUP_PROTECT, checkconst)); + + case WITH_CLEANUP_EXPR: + return build (WITH_CLEANUP_EXPR, type, + build_up_reference (type, TREE_OPERAND (targ, 0), + LOOKUP_PROTECT, checkconst), + 0, TREE_OPERAND (targ, 2)); + + case BIND_EXPR: + arg = TREE_OPERAND (targ, 1); + if (arg == NULL_TREE) + { + compiler_error ("({ ... }) expression not expanded when needed for reference"); + return error_mark_node; + } + rval = build1 (ADDR_EXPR, type, arg); + TREE_REFERENCE_EXPR (rval) = 1; + return rval; + + default: + break; + } + + if (TREE_ADDRESSABLE (targ) == 0) + { + tree temp; + + if (TREE_CODE (targ) == CALL_EXPR && IS_AGGR_TYPE (argtype)) + { + temp = build_cplus_new (argtype, targ, 1); + rval = build1 (ADDR_EXPR, type, temp); + goto done; + } + else + { + temp = get_temp_name (argtype, 0); + if (global_bindings_p ()) + { + /* Give this new temp some rtl and initialize it. */ + DECL_INITIAL (temp) = targ; + TREE_STATIC (temp) = 1; + finish_decl (temp, targ, NULL_TREE, 0); + /* Do this after declaring it static. */ + rval = build_unary_op (ADDR_EXPR, temp, 0); + TREE_TYPE (rval) = type; + literal_flag = TREE_CONSTANT (rval); + goto done; + } + else + { + rval = build_unary_op (ADDR_EXPR, temp, 0); + if (binfo && !BINFO_OFFSET_ZEROP (binfo)) + rval = convert_pointer_to (target_type, rval); + else + TREE_TYPE (rval) = type; + + temp = build (MODIFY_EXPR, argtype, temp, arg); + TREE_SIDE_EFFECTS (temp) = 1; + return build (COMPOUND_EXPR, type, temp, rval); + } + } + } + else + rval = build1 (ADDR_EXPR, type, arg); + + done_but_maybe_warn: + if (checkconst && TREE_READONLY (arg) && ! TYPE_READONLY (target_type)) + readonly_error (arg, "conversion to reference", 1); + + done: + if (TYPE_USES_COMPLEX_INHERITANCE (argtype)) + { + TREE_TYPE (rval) = TYPE_POINTER_TO (argtype); + rval = convert_pointer_to (target_type, rval); + TREE_TYPE (rval) = type; + } + TREE_CONSTANT (rval) = literal_flag; + return rval; +} + +/* For C++: Only need to do one-level references, but cannot + get tripped up on signed/unsigned differences. + + If DECL is NULL_TREE it means convert as though casting (by force). + If it is ERROR_MARK_NODE, it means the conversion is implicit, + and that temporaries may be created. + Make sure the use of user-defined conversion operators is un-ambiguous. + Otherwise, DECL is a _DECL node which can be used in error reporting. + + FNDECL, PARMNUM, and ERRTYPE are only used when checking for use of + volatile or const references where they aren't desired. */ + +tree +convert_to_reference (decl, reftype, expr, fndecl, parmnum, + errtype, strict, flags) + tree decl; + tree reftype, expr; + tree fndecl; + int parmnum; + char *errtype; + int strict, flags; +{ + register tree type = TYPE_MAIN_VARIANT (TREE_TYPE (reftype)); + register tree intype = TREE_TYPE (expr); + register enum tree_code form = TREE_CODE (intype); + tree rval = NULL_TREE; + + if (TREE_CODE(type) == ARRAY_TYPE) + type = build_pointer_type (TREE_TYPE(type)); + if (form == REFERENCE_TYPE) + intype = TREE_TYPE (intype); + intype = TYPE_MAIN_VARIANT (intype); + + if (IS_AGGR_TYPE (intype) + && (rval = build_type_conversion (CONVERT_EXPR, reftype, expr, 1))) + { + if (rval == error_mark_node) + cp_error ("conversion from `%T' to `%T' is ambiguous", + intype, reftype); + return rval; + } + + if (comptypes (type, intype, strict)) + { + /* Section 13. */ + if (flags & LOOKUP_COMPLAIN) + { + /* Since convert_for_initialization didn't call convert_for_assignment, + we have to do this checking here. FIXME: We should have a common + routine between here and convert_for_assignment. */ + if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE) + { + register tree ttl = TREE_TYPE (reftype); + register tree ttr = TREE_TYPE (TREE_TYPE (expr)); + + if (! TYPE_READONLY (ttl) && TYPE_READONLY (ttr)) + { + if (fndecl) + cp_pedwarn ("passing `%T' as argument %P of `%D' discards const", + TREE_TYPE (expr), parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' discards const", + errtype, reftype, TREE_TYPE (expr)); + } + if (! TYPE_VOLATILE (ttl) && TYPE_VOLATILE (ttr)) + { + if (fndecl) + cp_pedwarn ("passing `%T' as argument %P of `%D' discards volatile", + TREE_TYPE (expr), parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' discards volatile", + errtype, reftype, TREE_TYPE (expr)); + } + } else if (TREE_CODE (reftype) == REFERENCE_TYPE + && ! TREE_READONLY (TREE_TYPE (reftype)) + && ! lvalue_p (expr)) + { + /* Ensure semantics of 8.4.3 */ + if (fndecl) + cp_pedwarn ("ANSI C++ forbids passing non-lvalue `%T' as argument %P of `%D' into non-const &", + TREE_TYPE (expr), parmnum, fndecl); + else + cp_pedwarn ("ANSI C++ forbids %s to `%T' from non-lvalue `%T'", + errtype, reftype, TREE_TYPE (expr)); + } + } + + /* If EXPR is of aggregate type, and is really a CALL_EXPR, + then we don't need to convert it to reference type if + it is only being used to initialize DECL which is also + of the same aggregate type. */ + if (form == REFERENCE_TYPE + || (decl != NULL_TREE && decl != error_mark_node + && IS_AGGR_TYPE (type) + && TREE_CODE (expr) == CALL_EXPR + && TYPE_MAIN_VARIANT (type) == intype)) + { + if (decl && decl != error_mark_node) + { + tree e1 = build (INIT_EXPR, void_type_node, decl, expr); + tree e2; + + TREE_SIDE_EFFECTS (e1) = 1; + if (form == REFERENCE_TYPE) + e2 = build1 (NOP_EXPR, reftype, decl); + else + { + e2 = build_unary_op (ADDR_EXPR, decl, 0); + TREE_TYPE (e2) = reftype; + TREE_REFERENCE_EXPR (e2) = 1; + } + return build_compound_expr (tree_cons (NULL_TREE, e1, + build_tree_list (NULL_TREE, e2))); + } + expr = copy_node (expr); + TREE_TYPE (expr) = reftype; + return expr; + } + return build_up_reference (reftype, expr, flags, decl!=NULL_TREE); + } + + if (decl == error_mark_node) + { + tree rval_as_conversion = NULL_TREE; + tree rval_as_ctor = NULL_TREE; + + if (IS_AGGR_TYPE (intype) + && (rval = build_type_conversion (CONVERT_EXPR, type, expr, 1))) + { + if (rval == error_mark_node) + return rval; + + rval_as_conversion = build_up_reference (reftype, rval, flags, 1); + } + + /* Definitely need to go through a constructor here. */ + if (TYPE_HAS_CONSTRUCTOR (type) + && (rval = build_method_call + (NULL_TREE, constructor_name_full (type), + build_tree_list (NULL_TREE, expr), TYPE_BINFO (type), + LOOKUP_NO_CONVERSION|LOOKUP_SPECULATIVELY))) + { + tree init; + + if (global_bindings_p ()) + { + extern tree static_aggregates; + decl = get_temp_name (type, global_bindings_p ()); + init = build_method_call (decl, constructor_name_full (type), + build_tree_list (NULL_TREE, expr), + TYPE_BINFO (type), LOOKUP_NORMAL|LOOKUP_NO_CONVERSION); + + if (init == error_mark_node) + return error_mark_node; + + make_decl_rtl (decl, NULL_PTR, 1); + static_aggregates = perm_tree_cons (expr, decl, static_aggregates); + rval = build_unary_op (ADDR_EXPR, decl, 0); + } + else + { + init = build_method_call (NULL_TREE, constructor_name_full (type), + build_tree_list (NULL_TREE, expr), + TYPE_BINFO (type), LOOKUP_NORMAL|LOOKUP_NO_CONVERSION); + + if (init == error_mark_node) + return error_mark_node; + + rval = build_cplus_new (type, init, 1); + rval = build_up_reference (reftype, rval, flags, 1); + } + rval_as_ctor = rval; + } + + if (rval_as_ctor && rval_as_conversion) + { + cp_error ("ambiguous conversion from `%T' to `%T'; both user-defined conversion and constructor apply", + intype, reftype); + return error_mark_node; + } + else if (rval_as_ctor) + rval = rval_as_ctor; + else if (rval_as_conversion) + rval = rval_as_conversion; + else if (! IS_AGGR_TYPE (type) && ! IS_AGGR_TYPE (intype)) + { + rval = convert (type, expr); + if (rval == error_mark_node) + return error_mark_node; + + rval = build_up_reference (reftype, rval, flags, 1); + } + + if (rval && ! TYPE_READONLY (TREE_TYPE (reftype))) + cp_pedwarn ("converting `%T' to non-const `%T' will use a temporary", + intype, reftype); + } + + if (rval) + { + /* If we found a way to convert earlier, then use it. */ + return rval; + } + + my_friendly_assert (form != OFFSET_TYPE, 189); + + if ((flags & (LOOKUP_COMPLAIN|LOOKUP_SPECULATIVELY)) == LOOKUP_COMPLAIN) + cp_error ("cannot convert type `%T' to type `%T'", intype, reftype); + + if (flags & LOOKUP_SPECULATIVELY) + return NULL_TREE; + + return error_mark_node; +} + +/* We are using a reference VAL for its value. Bash that reference all the + way down to its lowest form. */ +tree +convert_from_reference (val) + tree val; +{ + tree type = TREE_TYPE (val); + + if (TREE_CODE (type) == OFFSET_TYPE) + type = TREE_TYPE (type); + if (TREE_CODE (type) == REFERENCE_TYPE) + { + tree target_type = TREE_TYPE (type); + tree nval; + + /* This can happen if we cast to a reference type. */ + if (TREE_CODE (val) == ADDR_EXPR) + { + nval = build1 (NOP_EXPR, build_pointer_type (target_type), val); + nval = build_indirect_ref (nval, NULL_PTR); + /* The below was missing, are other important flags missing too? */ + TREE_SIDE_EFFECTS (nval) = TREE_SIDE_EFFECTS (val); + return nval; + } + + nval = build1 (INDIRECT_REF, TYPE_MAIN_VARIANT (target_type), val); + + TREE_THIS_VOLATILE (nval) = TYPE_VOLATILE (target_type); + TREE_SIDE_EFFECTS (nval) = TYPE_VOLATILE (target_type); + TREE_READONLY (nval) = TYPE_READONLY (target_type); + /* The below was missing, are other important flags missing too? */ + TREE_SIDE_EFFECTS (nval) |= TREE_SIDE_EFFECTS (val); + return nval; + } + return val; +} + +/* See if there is a constructor of type TYPE which will convert + EXPR. The reference manual seems to suggest (8.5.6) that we need + not worry about finding constructors for base classes, then converting + to the derived class. + + MSGP is a pointer to a message that would be an appropriate error + string. If MSGP is NULL, then we are not interested in reporting + errors. */ +tree +convert_to_aggr (type, expr, msgp, protect) + tree type, expr; + char **msgp; + int protect; +{ + tree basetype = type; + tree name = TYPE_IDENTIFIER (basetype); + tree function, fndecl, fntype, parmtypes, parmlist, result; + tree method_name; + enum access_type access; + int can_be_private, can_be_protected; + + if (! TYPE_HAS_CONSTRUCTOR (basetype)) + { + if (msgp) + *msgp = "type `%s' does not have a constructor"; + return error_mark_node; + } + + access = access_public; + can_be_private = 0; + can_be_protected = IDENTIFIER_CLASS_VALUE (name) || name == current_class_name; + + parmlist = build_tree_list (NULL_TREE, expr); + parmtypes = tree_cons (NULL_TREE, TREE_TYPE (expr), void_list_node); + + if (TYPE_USES_VIRTUAL_BASECLASSES (basetype)) + { + parmtypes = tree_cons (NULL_TREE, integer_type_node, parmtypes); + parmlist = tree_cons (NULL_TREE, integer_one_node, parmlist); + } + + /* The type of the first argument will be filled in inside the loop. */ + parmlist = tree_cons (NULL_TREE, integer_zero_node, parmlist); + parmtypes = tree_cons (NULL_TREE, TYPE_POINTER_TO (basetype), parmtypes); + + method_name = build_decl_overload (name, parmtypes, 1); + + /* constructors are up front. */ + fndecl = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0); + if (TYPE_HAS_DESTRUCTOR (basetype)) + fndecl = DECL_CHAIN (fndecl); + + while (fndecl) + { + if (DECL_ASSEMBLER_NAME (fndecl) == method_name) + { + function = fndecl; + if (protect) + { + if (TREE_PRIVATE (fndecl)) + { + can_be_private = + (basetype == current_class_type + || is_friend (basetype, current_function_decl) + || purpose_member (basetype, DECL_ACCESS (fndecl))); + if (! can_be_private) + goto found; + } + else if (TREE_PROTECTED (fndecl)) + { + if (! can_be_protected) + goto found; + } + } + goto found_and_ok; + } + fndecl = DECL_CHAIN (fndecl); + } + + /* No exact conversion was found. See if an approximate + one will do. */ + fndecl = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0); + if (TYPE_HAS_DESTRUCTOR (basetype)) + fndecl = DECL_CHAIN (fndecl); + + { + int saw_private = 0; + int saw_protected = 0; + struct candidate *candidates = + (struct candidate *) alloca ((decl_list_length (fndecl)+1) * sizeof (struct candidate)); + struct candidate *cp = candidates; + + while (fndecl) + { + function = fndecl; + cp->h_len = 2; + if (flag_ansi_overloading) + cp->v.ansi_harshness = (struct harshness_code *) + alloca (3 * sizeof (struct harshness_code)); + else + cp->v.old_harshness = (unsigned short *) + alloca (3 * sizeof (short)); + + compute_conversion_costs (fndecl, parmlist, cp, 2); + if ((flag_ansi_overloading && (cp->h.code & EVIL_CODE) == 0) + || (!flag_ansi_overloading && cp->evil == 0)) + { + cp->u.field = fndecl; + if (protect) + { + if (TREE_PRIVATE (fndecl)) + access = access_private; + else if (TREE_PROTECTED (fndecl)) + access = access_protected; + else + access = access_public; + } + else + access = access_public; + + if (access == access_private + ? (basetype == current_class_type + || is_friend (basetype, cp->function) + || purpose_member (basetype, DECL_ACCESS (fndecl))) + : access == access_protected + ? (can_be_protected + || purpose_member (basetype, DECL_ACCESS (fndecl))) + : 1) + { + if ((flag_ansi_overloading && cp->h.code <= TRIVIAL_CODE) + || (!flag_ansi_overloading + && cp->user == 0 && cp->b_or_d == 0 + && cp->easy <= 1)) + goto found_and_ok; + cp++; + } + else + { + if (access == access_private) + saw_private = 1; + else + saw_protected = 1; + } + } + fndecl = DECL_CHAIN (fndecl); + } + if (cp - candidates) + { + /* Rank from worst to best. Then cp will point to best one. + Private fields have their bits flipped. For unsigned + numbers, this should make them look very large. + If the best alternate has a (signed) negative value, + then all we ever saw were private members. */ + if (cp - candidates > 1) + qsort (candidates, /* char *base */ + cp - candidates, /* int nel */ + sizeof (struct candidate), /* int width */ + rank_for_overload); /* int (*compar)() */ + + --cp; + if ((flag_ansi_overloading && (cp->h.code & EVIL_CODE)) + || (!flag_ansi_overloading && cp->evil > 1)) + { + if (msgp) + *msgp = "ambiguous type conversion possible for `%s'"; + return error_mark_node; + } + + function = cp->function; + fndecl = cp->u.field; + goto found_and_ok; + } + else if (msgp) + { + if (saw_private) + if (saw_protected) + *msgp = "only private and protected conversions apply"; + else + *msgp = "only private conversions apply"; + else if (saw_protected) + *msgp = "only protected conversions apply"; + } + return error_mark_node; + } + /* NOTREACHED */ + + not_found: + if (msgp) *msgp = "no appropriate conversion to type `%s'"; + return error_mark_node; + found: + if (access == access_private) + if (! can_be_private) + { + if (msgp) + *msgp = TREE_PRIVATE (fndecl) + ? "conversion to type `%s' is private" + : "conversion to type `%s' is from private base class"; + return error_mark_node; + } + if (access == access_protected) + if (! can_be_protected) + { + if (msgp) + *msgp = TREE_PRIVATE (fndecl) + ? "conversion to type `%s' is protected" + : "conversion to type `%s' is from protected base class"; + return error_mark_node; + } + function = fndecl; + found_and_ok: + + /* It will convert, but we don't do anything about it yet. */ + if (msgp == 0) + return NULL_TREE; + + fntype = TREE_TYPE (function); + if (DECL_INLINE (function) && TREE_CODE (function) == FUNCTION_DECL) + function = build1 (ADDR_EXPR, build_pointer_type (fntype), function); + else + function = default_conversion (function); + + result = build_nt (CALL_EXPR, function, + convert_arguments (NULL_TREE, TYPE_ARG_TYPES (fntype), + parmlist, NULL_TREE, LOOKUP_NORMAL), + NULL_TREE); + TREE_TYPE (result) = TREE_TYPE (fntype); + TREE_SIDE_EFFECTS (result) = 1; + TREE_RAISES (result) = !! TYPE_RAISES_EXCEPTIONS (fntype); + return result; +} + +/* Call this when we know (for any reason) that expr is not, in fact, + zero. This routine is like convert_pointer_to, but it pays + attention to which specific instance of what type we want to + convert to. This routine should eventually become + convert_to_pointer after all references to convert_to_pointer + are removed. */ +tree +convert_pointer_to_real (binfo, expr) + tree binfo, expr; +{ + register tree intype = TREE_TYPE (expr); + tree ptr_type; + tree type, rval; + + if (TREE_CODE (binfo) == TREE_VEC) + type = BINFO_TYPE (binfo); + else if (IS_AGGR_TYPE (binfo)) + { + type = binfo; + } + else + { + type = binfo; + binfo = NULL_TREE; + } + + ptr_type = build_pointer_type (type); + if (ptr_type == TYPE_MAIN_VARIANT (intype)) + return expr; + + if (intype == error_mark_node) + return error_mark_node; + + my_friendly_assert (!integer_zerop (expr), 191); + + if (TREE_CODE (type) == RECORD_TYPE + && TREE_CODE (TREE_TYPE (intype)) == RECORD_TYPE + && type != TYPE_MAIN_VARIANT (TREE_TYPE (intype))) + { + tree path; + int distance + = get_base_distance (binfo, TYPE_MAIN_VARIANT (TREE_TYPE (intype)), + 0, &path); + + /* This function shouldn't be called with unqualified arguments + but if it is, give them an error message that they can read. */ + if (distance < 0) + { + cp_error ("cannot convert a pointer of type `%T'", + TREE_TYPE (intype)); + cp_error ("to a pointer of type `%T'", type); + + if (distance == -2) + cp_error ("because `%T' is an ambiguous base class", type); + return error_mark_node; + } + + return build_vbase_path (PLUS_EXPR, ptr_type, expr, path, 1); + } + rval = build1 (NOP_EXPR, ptr_type, + TREE_CODE (expr) == NOP_EXPR ? TREE_OPERAND (expr, 0) : expr); + TREE_CONSTANT (rval) = TREE_CONSTANT (expr); + return rval; +} + +/* Call this when we know (for any reason) that expr is + not, in fact, zero. This routine gets a type out of the first + argument and uses it to search for the type to convert to. If there + is more than one instance of that type in the expr, the conversion is + ambiguous. This routine should eventually go away, and all + callers should use convert_to_pointer_real. */ +tree +convert_pointer_to (binfo, expr) + tree binfo, expr; +{ + tree type; + + if (TREE_CODE (binfo) == TREE_VEC) + type = BINFO_TYPE (binfo); + else if (IS_AGGR_TYPE (binfo)) + type = binfo; + else + type = binfo; + return convert_pointer_to_real (type, expr); +} + +/* Same as above, but don't abort if we get an "ambiguous" baseclass. + There's only one virtual baseclass we are looking for, and once + we find one such virtual baseclass, we have found them all. */ + +tree +convert_pointer_to_vbase (binfo, expr) + tree binfo; + tree expr; +{ + tree intype = TREE_TYPE (TREE_TYPE (expr)); + tree binfos = TYPE_BINFO_BASETYPES (intype); + int i; + + for (i = TREE_VEC_LENGTH (binfos)-1; i >= 0; i--) + { + tree basetype = BINFO_TYPE (TREE_VEC_ELT (binfos, i)); + if (BINFO_TYPE (binfo) == basetype) + return convert_pointer_to (binfo, expr); + if (binfo_member (BINFO_TYPE (binfo), CLASSTYPE_VBASECLASSES (basetype))) + return convert_pointer_to_vbase (binfo, convert_pointer_to (basetype, expr)); + } + my_friendly_abort (6); + /* NOTREACHED */ + return NULL_TREE; +} + +/* Create an expression whose value is that of EXPR, + converted to type TYPE. The TREE_TYPE of the value + is always TYPE. This function implements all reasonable + conversions; callers should filter out those that are + not permitted by the language being compiled. */ + +tree +convert (type, expr) + tree type, expr; +{ + register tree e = expr; + register enum tree_code code = TREE_CODE (type); + + if (type == TREE_TYPE (expr) + || TREE_CODE (expr) == ERROR_MARK) + return expr; + if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (expr))) + return fold (build1 (NOP_EXPR, type, expr)); + if (TREE_CODE (TREE_TYPE (expr)) == ERROR_MARK) + return error_mark_node; + if (TREE_CODE (TREE_TYPE (expr)) == VOID_TYPE) + { + error ("void value not ignored as it ought to be"); + return error_mark_node; + } + if (code == VOID_TYPE) + { + /* We're converting to a void type; see if they have an + `operator void'. */ + tree rval = build_type_conversion (NOP_EXPR, type, e, 0); + /* If we can convert to void type via a type conversion, do so. */ + if (rval) + return rval; + return build1 (CONVERT_EXPR, type, e); + } +#if 0 + /* This is incorrect. A truncation can't be stripped this way. + Extensions will be stripped by the use of get_unwidened. */ + if (TREE_CODE (expr) == NOP_EXPR) + return convert (type, TREE_OPERAND (expr, 0)); +#endif + + /* Just convert to the type of the member. */ + if (code == OFFSET_TYPE) + { + type = TREE_TYPE (type); + code = TREE_CODE (type); + } + + /* C++ */ + if (code == REFERENCE_TYPE) + return fold (convert_to_reference (error_mark_node, type, e, NULL_TREE, + -1, "conversion", -1, LOOKUP_NORMAL)); + else if (TREE_CODE (TREE_TYPE (e)) == REFERENCE_TYPE) + e = convert_from_reference (e); + + if (code == INTEGER_TYPE || code == ENUMERAL_TYPE) + { + tree intype = TREE_TYPE (expr); + enum tree_code form = TREE_CODE (intype); + /* enum = enum, enum = int, enum = float are all errors. */ + if (flag_int_enum_equivalence == 0 + && TREE_CODE (type) == ENUMERAL_TYPE + && (form == INTEGER_TYPE || form == REAL_TYPE + || form == ENUMERAL_TYPE)) + { + cp_pedwarn ("conversion from `%#T' to `%#T'", intype, type); + + if (flag_pedantic_errors) + return error_mark_node; + } + if (form == OFFSET_TYPE) + cp_error_at ("pointer-to-member expression object not composed with type `%D' object", + TYPE_NAME (TYPE_OFFSET_BASETYPE (intype))); + else if (IS_AGGR_TYPE (intype)) + { + tree rval; + rval = build_type_conversion (CONVERT_EXPR, type, expr, 1); + if (rval) return rval; + cp_error ("`%#T' used where an `int' was expected", intype); + return error_mark_node; + } + return fold (convert_to_integer (type, e)); + } + if (code == POINTER_TYPE) + return fold (cp_convert_to_pointer (type, e)); + if (code == REAL_TYPE) + { + if (IS_AGGR_TYPE (TREE_TYPE (e))) + { + tree rval; + rval = build_type_conversion (CONVERT_EXPR, type, e, 1); + if (rval) + return rval; + else + cp_error ("`%#T' used where a floating point value was expected", + TREE_TYPE (e)); + } + return fold (convert_to_real (type, e)); + } + + /* New C++ semantics: since assignment is now based on + memberwise copying, if the rhs type is derived from the + lhs type, then we may still do a conversion. */ + if (IS_AGGR_TYPE_CODE (code)) + { + tree dtype = TREE_TYPE (e); + + if (TREE_CODE (dtype) == REFERENCE_TYPE) + { + e = convert_from_reference (e); + dtype = TREE_TYPE (e); + } + dtype = TYPE_MAIN_VARIANT (dtype); + + /* Conversion of object pointers or signature pointers/references + to signature pointers/references. */ + + if (TYPE_LANG_SPECIFIC (type) + && (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type))) + { + tree constructor = build_signature_pointer_constructor (type, expr); + tree sig_ty = SIGNATURE_TYPE (type); + tree sig_ptr; + + if (constructor == error_mark_node) + return error_mark_node; + + sig_ptr = get_temp_name (type, 1); + DECL_INITIAL (sig_ptr) = constructor; + CLEAR_SIGNATURE (sig_ty); + finish_decl (sig_ptr, constructor, 0, 0); + SET_SIGNATURE (sig_ty); + TREE_READONLY (sig_ptr) = 1; + + return sig_ptr; + } + + /* Conversion between aggregate types. New C++ semantics allow + objects of derived type to be cast to objects of base type. + Old semantics only allowed this between pointers. + + There may be some ambiguity between using a constructor + vs. using a type conversion operator when both apply. */ + + else if (IS_AGGR_TYPE (dtype)) + { + tree binfo; + + tree conversion = TYPE_HAS_CONVERSION (dtype) + ? build_type_conversion (CONVERT_EXPR, type, e, 1) : NULL_TREE; + + if (TYPE_HAS_CONSTRUCTOR (type)) + { + tree rval = build_method_call (NULL_TREE, constructor_name_full (type), + build_tree_list (NULL_TREE, e), + TYPE_BINFO (type), + conversion ? LOOKUP_NO_CONVERSION : 0); + + if (rval != error_mark_node) + { + if (conversion) + { + error ("both constructor and type conversion operator apply"); + return error_mark_node; + } + /* call to constructor successful. */ + rval = build_cplus_new (type, rval, 0); + return rval; + } + } + /* Type conversion successful/applies. */ + if (conversion) + { + if (conversion == error_mark_node) + error ("ambiguous pointer conversion"); + return conversion; + } + + /* now try normal C++ assignment semantics. */ + binfo = TYPE_BINFO (dtype); + if (BINFO_TYPE (binfo) == type + || (binfo = get_binfo (type, dtype, 1))) + { + if (binfo == error_mark_node) + return error_mark_node; + } + if (binfo != NULL_TREE) + { + if (lvalue_p (e)) + { + e = build_unary_op (ADDR_EXPR, e, 0); + + if (! BINFO_OFFSET_ZEROP (binfo)) + e = build (PLUS_EXPR, TYPE_POINTER_TO (type), + e, BINFO_OFFSET (binfo)); + return build1 (INDIRECT_REF, type, e); + } + + sorry ("addressable aggregates"); + return error_mark_node; + } + error ("conversion between incompatible aggregate types requested"); + return error_mark_node; + } + /* conversion from non-aggregate to aggregate type requires + constructor. */ + else if (TYPE_HAS_CONSTRUCTOR (type)) + { + tree rval; + tree init = build_method_call (NULL_TREE, constructor_name_full (type), + build_tree_list (NULL_TREE, e), + TYPE_BINFO (type), LOOKUP_NORMAL); + if (init == error_mark_node) + { + cp_error ("in conversion to type `%T'", type); + return error_mark_node; + } + rval = build_cplus_new (type, init, 0); + return rval; + } + } + + /* If TYPE or TREE_TYPE (EXPR) is not on the permanent_obstack, + then the it won't be hashed and hence compare as not equal, + even when it is. */ + if (code == ARRAY_TYPE + && TREE_TYPE (TREE_TYPE (expr)) == TREE_TYPE (type) + && index_type_equal (TYPE_DOMAIN (TREE_TYPE (expr)), TYPE_DOMAIN (type))) + return expr; + + cp_error ("conversion from `%T' to non-scalar type `%T' requested", + TREE_TYPE (expr), type); + return error_mark_node; +} + +/* Like convert, except permit conversions to take place which + are not normally allowed due to access restrictions + (such as conversion from sub-type to private super-type). */ +tree +convert_force (type, expr) + tree type; + tree expr; +{ + register tree e = expr; + register enum tree_code code = TREE_CODE (type); + + if (code == REFERENCE_TYPE) + return fold (convert_to_reference (0, type, e, NULL_TREE, -1, + NULL, -1, 0)); + else if (TREE_CODE (TREE_TYPE (e)) == REFERENCE_TYPE) + e = convert_from_reference (e); + + if (code == POINTER_TYPE) + return fold (convert_to_pointer_force (type, e)); + + /* From cp-typeck.c convert_for_assignment */ + if (((TREE_CODE (TREE_TYPE (e)) == POINTER_TYPE && TREE_CODE (e) == ADDR_EXPR + && TREE_CODE (TREE_TYPE (e)) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (TREE_TYPE (e))) == METHOD_TYPE) + || integer_zerop (e)) + && TYPE_PTRMEMFUNC_P (type)) + { + /* compatible pointer to member functions. */ + e = build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), e, 1); + if (e == 0) + return error_mark_node; + return digest_init (type, e, (tree *)0); + } + { + int old_equiv = flag_int_enum_equivalence; + flag_int_enum_equivalence = 1; + e = convert (type, e); + flag_int_enum_equivalence = old_equiv; + } + return e; +} + +/* Subroutine of build_type_conversion. */ +static tree +build_type_conversion_1 (xtype, basetype, expr, typename, for_sure) + tree xtype, basetype; + tree expr; + tree typename; + int for_sure; +{ + tree first_arg = expr; + tree rval; + int flags; + + if (for_sure == 0) + { + if (! lvalue_p (expr)) + first_arg = build1 (NOP_EXPR, TYPE_POINTER_TO (basetype), integer_zero_node); + flags = LOOKUP_PROTECT; + } + else + flags = LOOKUP_NORMAL; + + rval = build_method_call (first_arg, constructor_name_full (typename), + NULL_TREE, NULL_TREE, flags); + if (rval == error_mark_node) + { + if (for_sure == 0) + return NULL_TREE; + return error_mark_node; + } + if (first_arg != expr) + { + expr = build_up_reference (build_reference_type (TREE_TYPE (expr)), expr, + LOOKUP_COMPLAIN, 1); + TREE_VALUE (TREE_OPERAND (rval, 1)) = build_unary_op (ADDR_EXPR, expr, 0); + } + if (TREE_CODE (TREE_TYPE (rval)) == REFERENCE_TYPE + && TREE_CODE (xtype) != REFERENCE_TYPE) + rval = default_conversion (rval); + + if (warn_cast_qual + && TREE_TYPE (xtype) + && (TREE_READONLY (TREE_TYPE (TREE_TYPE (rval))) + > TREE_READONLY (TREE_TYPE (xtype)))) + warning ("user-defined conversion casting away `const'"); + return convert (xtype, rval); +} + +/* Convert an aggregate EXPR to type XTYPE. If a conversion + exists, return the attempted conversion. This may + return ERROR_MARK_NODE if the conversion is not + allowed (references private members, etc). + If no conversion exists, NULL_TREE is returned. + + If (FOR_SURE & 1) is non-zero, then we allow this type conversion + to take place immediately. Otherwise, we build a SAVE_EXPR + which can be evaluated if the results are ever needed. + + If FOR_SURE >= 2, then we only look for exact conversions. + + TYPE may be a reference type, in which case we first look + for something that will convert to a reference type. If + that fails, we will try to look for something of the + reference's target type, and then return a reference to that. */ +tree +build_type_conversion (code, xtype, expr, for_sure) + enum tree_code code; + tree xtype, expr; + int for_sure; +{ + /* C++: check to see if we can convert this aggregate type + into the required scalar type. */ + tree type, type_default; + tree typename = build_typename_overload (xtype), *typenames; + int n_variants = 0; + tree basetype, save_basetype; + tree rval; + int exact_conversion = for_sure >= 2; + for_sure &= 1; + + if (expr == error_mark_node) + return error_mark_node; + + basetype = TREE_TYPE (expr); + if (TREE_CODE (basetype) == REFERENCE_TYPE) + basetype = TREE_TYPE (basetype); + + basetype = TYPE_MAIN_VARIANT (basetype); + if (! TYPE_LANG_SPECIFIC (basetype) || ! TYPE_HAS_CONVERSION (basetype)) + return NULL_TREE; + + if (TREE_CODE (xtype) == POINTER_TYPE + || TREE_CODE (xtype) == REFERENCE_TYPE) + { + /* Prepare to match a variant of this type. */ + type = TYPE_MAIN_VARIANT (TREE_TYPE (xtype)); + for (n_variants = 0; type; type = TYPE_NEXT_VARIANT (type)) + n_variants++; + typenames = (tree *)alloca (n_variants * sizeof (tree)); + for (n_variants = 0, type = TYPE_MAIN_VARIANT (TREE_TYPE (xtype)); + type; n_variants++, type = TYPE_NEXT_VARIANT (type)) + { + if (type == TREE_TYPE (xtype)) + typenames[n_variants] = typename; + else if (TREE_CODE (xtype) == POINTER_TYPE) + typenames[n_variants] = build_typename_overload (build_pointer_type (type)); + else + typenames[n_variants] = build_typename_overload (build_reference_type (type)); + } + } + + save_basetype = basetype; + type = xtype; + + while (TYPE_HAS_CONVERSION (basetype)) + { + int i; + if (lookup_fnfields (TYPE_BINFO (basetype), typename, 0)) + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + for (i = 0; i < n_variants; i++) + if (typenames[i] != typename + && lookup_fnfields (TYPE_BINFO (basetype), typenames[i], 0)) + return build_type_conversion_1 (xtype, basetype, expr, typenames[i], for_sure); + + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + + if (TREE_CODE (type) == REFERENCE_TYPE) + { + tree first_arg = expr; + type = TYPE_MAIN_VARIANT (TREE_TYPE (type)); + basetype = save_basetype; + + /* May need to build a temporary for this. */ + while (TYPE_HAS_CONVERSION (basetype)) + { + if (lookup_fnfields (TYPE_BINFO (basetype), typename, 0)) + { + int flags; + + if (for_sure == 0) + { + if (! lvalue_p (expr)) + first_arg = build1 (NOP_EXPR, TYPE_POINTER_TO (basetype), integer_zero_node); + flags = LOOKUP_PROTECT; + } + else + flags = LOOKUP_NORMAL; + rval = build_method_call (first_arg, constructor_name_full (typename), + NULL_TREE, NULL_TREE, flags); + if (rval == error_mark_node) + { + if (for_sure == 0) + return NULL_TREE; + return error_mark_node; + } + TREE_VALUE (TREE_OPERAND (rval, 1)) = expr; + + if (IS_AGGR_TYPE (type)) + { + tree init = build_method_call (NULL_TREE, + constructor_name_full (type), + build_tree_list (NULL_TREE, rval), NULL_TREE, LOOKUP_NORMAL); + tree temp = build_cplus_new (type, init, 1); + return build_up_reference (TYPE_REFERENCE_TO (type), temp, + LOOKUP_COMPLAIN, 1); + } + return convert (xtype, rval); + } + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + /* No free conversions for reference types, right?. */ + return NULL_TREE; + } + + if (exact_conversion) + return NULL_TREE; + + /* No perfect match found, try default. */ +#if 0 /* This is wrong; there is no standard conversion from void* to + anything. -jason */ + if (code == CONVERT_EXPR && TREE_CODE (type) == POINTER_TYPE) + type_default = ptr_type_node; + else +#endif + if (type == void_type_node) + return NULL_TREE; + else + { + tree tmp = default_conversion (build1 (NOP_EXPR, type, integer_zero_node)); + if (tmp == error_mark_node) + return NULL_TREE; + type_default = TREE_TYPE (tmp); + } + + basetype = save_basetype; + + if (type_default != type) + { + type = type_default; + typename = build_typename_overload (type); + + while (TYPE_HAS_CONVERSION (basetype)) + { + if (lookup_fnfields (TYPE_BINFO (basetype), typename, 0)) + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + } + + try_pointer: + + if (type == ptr_type_node) + { + /* Try converting to some other pointer type + with which void* is compatible, or in situations + in which void* is appropriate (such as &&,||, and !). */ + + while (TYPE_HAS_CONVERSION (basetype)) + { + if (CLASSTYPE_CONVERSION (basetype, ptr_conv) != 0) + { + if (CLASSTYPE_CONVERSION (basetype, ptr_conv) == error_mark_node) + return error_mark_node; + typename = DECL_NAME (CLASSTYPE_CONVERSION (basetype, ptr_conv)); + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + } + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + } + if (TREE_CODE (type) == POINTER_TYPE + && TYPE_READONLY (TREE_TYPE (type)) + && TYPE_MAIN_VARIANT (TREE_TYPE (type)) == void_type_node) + { + /* Try converting to some other pointer type + with which const void* is compatible. */ + + while (TYPE_HAS_CONVERSION (basetype)) + { + if (CLASSTYPE_CONVERSION (basetype, constptr_conv) != 0) + { + if (CLASSTYPE_CONVERSION (basetype, constptr_conv) == error_mark_node) + return error_mark_node; + typename = DECL_NAME (CLASSTYPE_CONVERSION (basetype, constptr_conv)); + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + } + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + } + /* Use the longer or shorter conversion that is appropriate. Have + to check against 0 because the conversion may come from a baseclass. */ + if (TREE_CODE (type) == INTEGER_TYPE + && TYPE_HAS_INT_CONVERSION (basetype) + && CLASSTYPE_CONVERSION (basetype, int_conv) != 0 + && CLASSTYPE_CONVERSION (basetype, int_conv) != error_mark_node) + { + typename = DECL_NAME (CLASSTYPE_CONVERSION (basetype, int_conv)); + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + } + + if (TREE_CODE (type) == REAL_TYPE + && TYPE_HAS_REAL_CONVERSION (basetype) + && CLASSTYPE_CONVERSION (basetype, real_conv) != 0 + && CLASSTYPE_CONVERSION (basetype, real_conv) != error_mark_node) + { + /* Only accept using an operator double() if there isn't a conflicting + operator int(). */ + if (flag_ansi_overloading && TYPE_HAS_INT_CONVERSION (basetype)) + { + error ("two possible conversions for type `%s'", + TYPE_NAME_STRING (type)); + return error_mark_node; + } + + typename = DECL_NAME (CLASSTYPE_CONVERSION (basetype, real_conv)); + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + } + + /* THIS IS A KLUDGE. */ + if (TREE_CODE (type) != POINTER_TYPE + && (code == TRUTH_ANDIF_EXPR + || code == TRUTH_ORIF_EXPR + || code == TRUTH_NOT_EXPR)) + { + /* Here's when we can convert to a pointer. */ + type = ptr_type_node; + goto try_pointer; + } + + /* THESE ARE TOTAL KLUDGES. */ + /* Default promotion yields no new alternatives, try + conversions which are anti-default, such as + + double -> float or int -> unsigned or unsigned -> long + + */ + if (type_default == type + && (TREE_CODE (type) == INTEGER_TYPE || TREE_CODE (type) == REAL_TYPE)) + { + int not_again = 0; + + if (type == double_type_node) + typename = build_typename_overload (float_type_node); + else if (type == integer_type_node) + typename = build_typename_overload (unsigned_type_node); + else if (type == unsigned_type_node) + typename = build_typename_overload (long_integer_type_node); + + again: + basetype = save_basetype; + while (TYPE_HAS_CONVERSION (basetype)) + { + if (lookup_fnfields (TYPE_BINFO (basetype), typename, 0)) + return build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + if (! not_again) + { + if (type == integer_type_node) + { + typename = build_typename_overload (long_integer_type_node); + not_again = 1; + goto again; + } + else + { + typename = build_typename_overload (integer_type_node); + not_again = 1; + goto again; + } + } + } + + /* Now, try C promotions... + + float -> int + int -> float, void * + void * -> int + + Truthvalue conversions let us try to convert + to pointer if we were going for int, and to int + if we were looking for pointer. */ + + basetype = save_basetype; + if (TREE_CODE (type) == REAL_TYPE + || (TREE_CODE (type) == POINTER_TYPE + && (code == TRUTH_ANDIF_EXPR + || code == TRUTH_ORIF_EXPR + || code == TRUTH_NOT_EXPR))) + type = integer_type_node; + else if (TREE_CODE (type) == INTEGER_TYPE) + if (TYPE_HAS_REAL_CONVERSION (basetype)) + type = double_type_node; + else + return NULL_TREE; + else + return NULL_TREE; + + typename = build_typename_overload (type); + while (TYPE_HAS_CONVERSION (basetype)) + { + if (lookup_fnfields (TYPE_BINFO (basetype), typename, 0)) + { + rval = build_type_conversion_1 (xtype, basetype, expr, typename, for_sure); + return rval; + } + if (TYPE_BINFO_BASETYPES (basetype)) + basetype = TYPE_BINFO_BASETYPE (basetype, 0); + else + break; + } + + return NULL_TREE; +} + +/* Must convert two aggregate types to non-aggregate type. + Attempts to find a non-ambiguous, "best" type conversion. + + Return 1 on success, 0 on failure. + + @@ What are the real semantics of this supposed to be??? */ +int +build_default_binary_type_conversion (code, arg1, arg2) + enum tree_code code; + tree *arg1, *arg2; +{ + tree type1 = TREE_TYPE (*arg1); + tree type2 = TREE_TYPE (*arg2); + + if (TREE_CODE (type1) == REFERENCE_TYPE + || TREE_CODE (type1) == POINTER_TYPE) + type1 = TREE_TYPE (type1); + if (TREE_CODE (type2) == REFERENCE_TYPE + || TREE_CODE (type2) == POINTER_TYPE) + type2 = TREE_TYPE (type2); + + if (TREE_CODE (TYPE_NAME (type1)) != TYPE_DECL) + { + tree decl = typedecl_for_tag (type1); + if (decl) + error ("type conversion nonexistent for type `%s'", + IDENTIFIER_POINTER (DECL_NAME (decl))); + else + error ("type conversion nonexistent for non-C++ type"); + return 0; + } + if (TREE_CODE (TYPE_NAME (type2)) != TYPE_DECL) + { + tree decl = typedecl_for_tag (type2); + if (decl) + error ("type conversion nonexistent for type `%s'", + IDENTIFIER_POINTER (decl)); + else + error ("type conversion nonexistent for non-C++ type"); + return 0; + } + + if (!IS_AGGR_TYPE (type1) || !TYPE_HAS_CONVERSION (type1)) + { + if (!IS_AGGR_TYPE (type2) || !TYPE_HAS_CONVERSION (type2)) + cp_error ("no conversion from `%T' and `%T' to types with default `%O' ", + type1, type2, code); + else + cp_error ("no conversion from `%T' to type with default `%O'", + type1, code); + return 0; + } + else if (!IS_AGGR_TYPE (type2) || !TYPE_HAS_CONVERSION (type2)) + { + cp_error ("no conversion from `%T' to type with default `%O'", + type2, code); + return 0; + } + + if (TYPE_HAS_INT_CONVERSION (type1) && TYPE_HAS_REAL_CONVERSION (type1)) + cp_warning ("ambiguous type conversion for type `%T', defaulting to int", + type1); + if (TYPE_HAS_INT_CONVERSION (type1)) + { + *arg1 = build_type_conversion (code, integer_type_node, *arg1, 1); + *arg2 = build_type_conversion (code, integer_type_node, *arg2, 1); + } + else if (TYPE_HAS_REAL_CONVERSION (type1)) + { + *arg1 = build_type_conversion (code, double_type_node, *arg1, 1); + *arg2 = build_type_conversion (code, double_type_node, *arg2, 1); + } + else + { + *arg1 = build_type_conversion (code, ptr_type_node, *arg1, 1); + if (*arg1 == error_mark_node) + error ("ambiguous pointer conversion"); + *arg2 = build_type_conversion (code, ptr_type_node, *arg2, 1); + if (*arg1 != error_mark_node && *arg2 == error_mark_node) + error ("ambiguous pointer conversion"); + } + if (*arg1 == 0) + { + if (*arg2 == 0 && type1 != type2) + cp_error ("default type conversion for types `%T' and `%T' failed", + type1, type2); + else + cp_error ("default type conversion for type `%T' failed", type1); + return 0; + } + else if (*arg2 == 0) + { + cp_error ("default type conversion for type `%T' failed", type2); + return 0; + } + return 1; +} + +/* Must convert two aggregate types to non-aggregate type. + Attempts to find a non-ambiguous, "best" type conversion. + + Return 1 on success, 0 on failure. + + The type of the argument is expected to be of aggregate type here. + + @@ What are the real semantics of this supposed to be??? */ +int +build_default_unary_type_conversion (code, arg) + enum tree_code code; + tree *arg; +{ + tree type = TREE_TYPE (*arg); + tree id = TREE_CODE (TYPE_NAME (type)) == TYPE_DECL + ? TYPE_IDENTIFIER (type) : TYPE_NAME (type); + char *name = IDENTIFIER_POINTER (id); + + if (! TYPE_HAS_CONVERSION (type)) + { + error ("type conversion required for type `%s'", name); + return 0; + } + + if (TYPE_HAS_INT_CONVERSION (type) && TYPE_HAS_REAL_CONVERSION (type)) + warning ("ambiguous type conversion for type `%s', defaulting to int", + name); + if (TYPE_HAS_INT_CONVERSION (type)) + *arg = build_type_conversion (code, integer_type_node, *arg, 1); + else if (TYPE_HAS_REAL_CONVERSION (type)) + *arg = build_type_conversion (code, double_type_node, *arg, 1); + else + { + *arg = build_type_conversion (code, ptr_type_node, *arg, 1); + if (*arg == error_mark_node) + error ("ambiguous pointer conversion"); + } + if (*arg == NULL_TREE) + { + error ("default type conversion for type `%s' failed", name); + return 0; + } + return 1; +} diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c new file mode 100644 index 0000000..9a31201 --- /dev/null +++ b/gcc/cp/decl.c @@ -0,0 +1,12087 @@ +/* Process declarations and variables for C compiler. + Copyright (C) 1988, 1992, 1993, 1994 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* Process declarations and symbol lookup for C front end. + Also constructs types; the standard scalar types at initialization, + and structure, union, array and enum types when they are declared. */ + +/* ??? not all decl nodes are given the most useful possible + line numbers. For example, the CONST_DECLs for enum values. */ + +#include <stdio.h> +#include "config.h" +#include "tree.h" +#include "rtl.h" +#include "flags.h" +#include "cp-tree.h" +#include "decl.h" +#include "lex.h" +#include <sys/types.h> +#include <signal.h> +#include "obstack.h" + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +extern struct obstack permanent_obstack; + +extern int current_class_depth; + +/* Stack of places to restore the search obstack back to. */ + +/* Obstack used for remembering local class declarations (like + enums and static (const) members. */ +#include "stack.h" +static struct obstack decl_obstack; +static struct stack_level *decl_stack; + +#ifndef CHAR_TYPE_SIZE +#define CHAR_TYPE_SIZE BITS_PER_UNIT +#endif + +#ifndef SHORT_TYPE_SIZE +#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2)) +#endif + +#ifndef INT_TYPE_SIZE +#define INT_TYPE_SIZE BITS_PER_WORD +#endif + +#ifndef LONG_TYPE_SIZE +#define LONG_TYPE_SIZE BITS_PER_WORD +#endif + +#ifndef LONG_LONG_TYPE_SIZE +#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2) +#endif + +#ifndef WCHAR_UNSIGNED +#define WCHAR_UNSIGNED 0 +#endif + +#ifndef FLOAT_TYPE_SIZE +#define FLOAT_TYPE_SIZE BITS_PER_WORD +#endif + +#ifndef DOUBLE_TYPE_SIZE +#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) +#endif + +#ifndef LONG_DOUBLE_TYPE_SIZE +#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) +#endif + +/* We let tm.h override the types used here, to handle trivial differences + such as the choice of unsigned int or long unsigned int for size_t. + When machines start needing nontrivial differences in the size type, + it would be best to do something here to figure out automatically + from other information what type to use. */ + +#ifndef SIZE_TYPE +#define SIZE_TYPE "long unsigned int" +#endif + +#ifndef PTRDIFF_TYPE +#define PTRDIFF_TYPE "long int" +#endif + +#ifndef WCHAR_TYPE +#define WCHAR_TYPE "int" +#endif + +#define builtin_function(NAME, TYPE, CODE, LIBNAME) \ + define_function (NAME, TYPE, CODE, (void (*)())pushdecl, LIBNAME) +#define auto_function(NAME, TYPE, CODE) \ + do { \ + tree __name = NAME; \ + tree __type = TYPE; \ + define_function (IDENTIFIER_POINTER (__name), __type, CODE, \ + (void (*)())push_overloaded_decl_1, \ + IDENTIFIER_POINTER (build_decl_overload (__name, TYPE_ARG_TYPES (__type), 0)));\ + } while (0) + +static tree grokparms PROTO((tree, int)); +static tree lookup_nested_type PROTO((tree, tree)); +static char *redeclaration_error_message PROTO((tree, tree)); +static void grok_op_properties PROTO((tree, int, int)); +static void deactivate_exception_cleanups PROTO((void)); + +tree define_function + PROTO((char *, tree, enum built_in_function, void (*)(), char *)); + +/* a node which has tree code ERROR_MARK, and whose type is itself. + All erroneous expressions are replaced with this node. All functions + that accept nodes as arguments should avoid generating error messages + if this node is one of the arguments, since it is undesirable to get + multiple error messages from one error in the input. */ + +tree error_mark_node; + +/* Erroneous argument lists can use this *IFF* they do not modify it. */ +tree error_mark_list; + +/* INTEGER_TYPE and REAL_TYPE nodes for the standard data types */ + +tree short_integer_type_node; +tree integer_type_node; +tree long_integer_type_node; +tree long_long_integer_type_node; + +tree short_unsigned_type_node; +tree unsigned_type_node; +tree long_unsigned_type_node; +tree long_long_unsigned_type_node; + +tree ptrdiff_type_node; + +tree unsigned_char_type_node; +tree signed_char_type_node; +tree char_type_node; +tree wchar_type_node; +tree signed_wchar_type_node; +tree unsigned_wchar_type_node; + +tree float_type_node; +tree double_type_node; +tree long_double_type_node; + +tree intQI_type_node; +tree intHI_type_node; +tree intSI_type_node; +tree intDI_type_node; + +tree unsigned_intQI_type_node; +tree unsigned_intHI_type_node; +tree unsigned_intSI_type_node; +tree unsigned_intDI_type_node; + +/* a VOID_TYPE node, and the same, packaged in a TREE_LIST. */ + +tree void_type_node, void_list_node; +tree void_zero_node; + +/* Nodes for types `void *' and `const void *'. */ + +tree ptr_type_node, const_ptr_type_node; + +/* Nodes for types `char *' and `const char *'. */ + +tree string_type_node, const_string_type_node; + +/* Type `char[256]' or something like it. + Used when an array of char is needed and the size is irrelevant. */ + +tree char_array_type_node; + +/* Type `int[256]' or something like it. + Used when an array of int needed and the size is irrelevant. */ + +tree int_array_type_node; + +/* Type `wchar_t[256]' or something like it. + Used when a wide string literal is created. */ + +tree wchar_array_type_node; + +/* type `int ()' -- used for implicit declaration of functions. */ + +tree default_function_type; + +/* function types `double (double)' and `double (double, double)', etc. */ + +tree double_ftype_double, double_ftype_double_double; +tree int_ftype_int, long_ftype_long; + +/* Function type `void (void *, void *, int)' and similar ones. */ + +tree void_ftype_ptr_ptr_int, int_ftype_ptr_ptr_int, void_ftype_ptr_int_int; + +/* Function type `char *(char *, char *)' and similar ones */ +tree string_ftype_ptr_ptr, int_ftype_string_string; + +/* Function type `size_t (const char *)' */ +tree sizet_ftype_string; + +/* Function type `int (const void *, const void *, size_t)' */ +tree int_ftype_cptr_cptr_sizet; + +/* C++ extensions */ +tree vtable_entry_type; +tree delta_type_node; +tree __t_desc_type_node, __i_desc_type_node, __m_desc_type_node; +tree __t_desc_array_type, __i_desc_array_type, __m_desc_array_type; +tree class_star_type_node; +tree class_type_node, record_type_node, union_type_node, enum_type_node; +tree exception_type_node, unknown_type_node; +tree opaque_type_node, signature_type_node; +tree sigtable_entry_type; +tree maybe_gc_cleanup; + +/* Used for virtual function tables. */ +tree vtbl_mask; + +/* Array type `vtable_entry_type[]' */ +tree vtbl_type_node; + +/* Static decls which do not have static initializers have no + initializers as far as GNU C is concerned. EMPTY_INIT_NODE + is a static initializer which makes varasm code place the decl + in data rather than in bss space. Such gymnastics are necessary + to avoid the problem that the linker will not include a library + file if all the library appears to contribute are bss variables. */ + +tree empty_init_node; + +/* In a destructor, the point at which all derived class destroying + has been done, just before any base class destroying will be done. */ + +tree dtor_label; + +/* In a constructor, the point at which we are ready to return + the pointer to the initialized object. */ + +tree ctor_label; + +/* A FUNCTION_DECL which can call `unhandled_exception'. + Not necessarily the one that the user will declare, + but sufficient to be called by routines that want to abort the program. */ + +tree unhandled_exception_fndecl; + +/* A FUNCTION_DECL which can call `abort'. Not necessarily the + one that the user will declare, but sufficient to be called + by routines that want to abort the program. */ + +tree abort_fndecl; + +extern rtx cleanup_label, return_label; + +/* If original DECL_RESULT of current function was a register, + but due to being an addressable named return value, would up + on the stack, this variable holds the named return value's + original location. */ +rtx original_result_rtx; + +/* Sequence of insns which represents base initialization. */ +rtx base_init_insns; + +/* C++: Keep these around to reduce calls to `get_identifier'. + Identifiers for `this' in member functions and the auto-delete + parameter for destructors. */ +tree this_identifier, in_charge_identifier; +/* Used in pointer to member functions, and in vtables. */ +tree pfn_identifier, index_identifier, delta_identifier, delta2_identifier; +tree pfn_or_delta2_identifier; + +/* A list (chain of TREE_LIST nodes) of named label uses. + The TREE_PURPOSE field is the list of variables defined + the the label's scope defined at the point of use. + The TREE_VALUE field is the LABEL_DECL used. + The TREE_TYPE field holds `current_binding_level' at the + point of the label's use. + + Used only for jumps to as-yet undefined labels, since + jumps to defined labels can have their validity checked + by stmt.c. */ + +static tree named_label_uses; + +/* A list of objects which have constructors or destructors + which reside in the global scope. The decl is stored in + the TREE_VALUE slot and the initializer is stored + in the TREE_PURPOSE slot. */ +tree static_aggregates; + +/* A list of functions which were declared inline, but later had their + address taken. Used only for non-virtual member functions, since we can + find other functions easily enough. */ +tree pending_addressable_inlines; + +/* A list of overloaded functions which we should forget ever + existed, such as functions declared in a function's scope, + once we leave that function's scope. */ +static tree overloads_to_forget; + +/* -- end of C++ */ + +/* Two expressions that are constants with value zero. + The first is of type `int', the second of type `void *'. */ + +tree integer_zero_node; +tree null_pointer_node; + +/* A node for the integer constants 1, 2, and 3. */ + +tree integer_one_node, integer_two_node, integer_three_node; + +/* Nonzero if we have seen an invalid cross reference + to a struct, union, or enum, but not yet printed the message. */ + +tree pending_invalid_xref; +/* File and line to appear in the eventual error message. */ +char *pending_invalid_xref_file; +int pending_invalid_xref_line; + +/* While defining an enum type, this is 1 plus the last enumerator + constant value. */ + +static tree enum_next_value; + +/* Parsing a function declarator leaves a list of parameter names + or a chain or parameter decls here. */ + +tree last_function_parms; + +/* Parsing a function declarator leaves here a chain of structure + and enum types declared in the parmlist. */ + +static tree last_function_parm_tags; + +/* After parsing the declarator that starts a function definition, + `start_function' puts here the list of parameter names or chain of decls. + `store_parm_decls' finds it here. */ + +static tree current_function_parms; + +/* Similar, for last_function_parm_tags. */ +static tree current_function_parm_tags; + +/* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function + that have names. Here so we can clear out their names' definitions + at the end of the function. */ + +static tree named_labels; + +/* A list of LABEL_DECLs from outer contexts that are currently shadowed. */ + +static tree shadowed_labels; + +#if 0 /* Not needed by C++ */ +/* Nonzero when store_parm_decls is called indicates a varargs function. + Value not meaningful after store_parm_decls. */ + +static int c_function_varargs; +#endif + +/* The FUNCTION_DECL for the function currently being compiled, + or 0 if between functions. */ +tree current_function_decl; + +/* Set to 0 at beginning of a function definition, set to 1 if + a return statement that specifies a return value is seen. */ + +int current_function_returns_value; + +/* Set to 0 at beginning of a function definition, set to 1 if + a return statement with no argument is seen. */ + +int current_function_returns_null; + +/* Set to 0 at beginning of a function definition, and whenever + a label (case or named) is defined. Set to value of expression + returned from function when that value can be transformed into + a named return value. */ + +tree current_function_return_value; + +/* Set to nonzero by `grokdeclarator' for a function + whose return type is defaulted, if warnings for this are desired. */ + +static int warn_about_return_type; + +/* Nonzero when starting a function declared `extern inline'. */ + +static int current_extern_inline; + +/* Nonzero means give `double' the same size as `float'. */ + +extern int flag_short_double; + +/* Nonzero means don't recognize any builtin functions. */ + +extern int flag_no_builtin; + +/* Nonzero means do emit exported implementations of functions even if + they can be inlined. */ + +extern int flag_implement_inlines; + +/* Nonzero means handle things in ANSI, instead of GNU fashion. This + flag should be tested for language behavior that's different between + ANSI and GNU, but not so horrible as to merit a PEDANTIC label. */ + +extern int flag_ansi; + +/* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes) + objects. */ +extern int flag_huge_objects; + +/* Nonzero if we want to conserve space in the .o files. We do this + by putting uninitialized data and runtime initialized data into + .common instead of .data at the expense of not flaging multiple + definitions. */ +extern int flag_conserve_space; + +/* Pointers to the base and current top of the language name stack. */ + +extern tree *current_lang_base, *current_lang_stack; + +/* C and C++ flags are in cp-decl2.c. */ + +/* Set to 0 at beginning of a constructor, set to 1 + if that function does an allocation before referencing its + instance variable. */ +int current_function_assigns_this; +int current_function_just_assigned_this; + +/* Set to 0 at beginning of a function. Set non-zero when + store_parm_decls is called. Don't call store_parm_decls + if this flag is non-zero! */ +int current_function_parms_stored; + +/* Current end of entries in the gc obstack for stack pointer variables. */ + +int current_function_obstack_index; + +/* Flag saying whether we have used the obstack in this function or not. */ + +int current_function_obstack_usage; + +/* Flag used when debugging cp-spew.c */ + +extern int spew_debug; + +/* This is a copy of the class_shadowed list of the previous class binding + contour when at global scope. It's used to reset IDENTIFIER_CLASS_VALUEs + when entering another class scope (i.e. a cache miss). */ +extern tree previous_class_values; + + +/* Allocate a level of searching. */ +struct stack_level * +push_decl_level (stack, obstack) + struct stack_level *stack; + struct obstack *obstack; +{ + struct stack_level tem; + tem.prev = stack; + + return push_stack_level (obstack, (char *)&tem, sizeof (tem)); +} + +/* For each binding contour we allocate a binding_level structure + * which records the names defined in that contour. + * Contours include: + * 0) the global one + * 1) one for each function definition, + * where internal declarations of the parameters appear. + * 2) one for each compound statement, + * to record its declarations. + * + * The current meaning of a name can be found by searching the levels from + * the current one out to the global one. + * + * Off to the side, may be the class_binding_level. This exists + * only to catch class-local declarations. It is otherwise + * nonexistent. + * + * Also there may be binding levels that catch cleanups that + * must be run when exceptions occur. + */ + +/* Note that the information in the `names' component of the global contour + is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */ + +struct binding_level + { + /* A chain of _DECL nodes for all variables, constants, functions, + * and typedef types. These are in the reverse of the order supplied. + */ + tree names; + + /* A list of structure, union and enum definitions, + * for looking up tag names. + * It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name, + * or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE, + * or ENUMERAL_TYPE node. + * + * C++: the TREE_VALUE nodes can be simple types for component_bindings. + * + */ + tree tags; + + /* For each level, a list of shadowed outer-level local definitions + to be restored when this level is popped. + Each link is a TREE_LIST whose TREE_PURPOSE is an identifier and + whose TREE_VALUE is its old definition (a kind of ..._DECL node). */ + tree shadowed; + + /* Same, for IDENTIFIER_CLASS_VALUE. */ + tree class_shadowed; + + /* Same, for IDENTIFIER_TYPE_VALUE. */ + tree type_shadowed; + + /* For each level (except not the global one), + a chain of BLOCK nodes for all the levels + that were entered and exited one level down. */ + tree blocks; + + /* The BLOCK node for this level, if one has been preallocated. + If 0, the BLOCK is allocated (if needed) when the level is popped. */ + tree this_block; + + /* The binding level which this one is contained in (inherits from). */ + struct binding_level *level_chain; + + /* Number of decls in `names' that have incomplete + structure or union types. */ + unsigned short n_incomplete; + + /* 1 for the level that holds the parameters of a function. + 2 for the level that holds a class declaration. + 3 for levels that hold parameter declarations. */ + unsigned parm_flag : 4; + + /* 1 means make a BLOCK for this level regardless of all else. + 2 for temporary binding contours created by the compiler. */ + unsigned keep : 3; + + /* Nonzero if this level "doesn't exist" for tags. */ + unsigned tag_transparent : 1; + + /* Nonzero if this level can safely have additional + cleanup-needing variables added to it. */ + unsigned more_cleanups_ok : 1; + unsigned have_cleanups : 1; + + /* Nonzero if this level can safely have additional + exception-raising statements added to it. */ + unsigned more_exceptions_ok : 1; + unsigned have_exceptions : 1; + + /* Nonzero if we should accept any name as an identifier in + this scope. This happens in some template definitions. */ + unsigned accept_any : 1; + + /* Nonzero if this level is for completing a template class definition + inside a binding level that temporarily binds the parameters. This + means that definitions here should not be popped off when unwinding + this binding level. (Not actually implemented this way, + unfortunately.) */ + unsigned pseudo_global : 1; + + /* Two bits left for this word. */ + +#if defined(DEBUG_CP_BINDING_LEVELS) + /* Binding depth at which this level began. */ + unsigned binding_depth; +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + }; + +#define NULL_BINDING_LEVEL ((struct binding_level *) NULL) + +/* The (non-class) binding level currently in effect. */ + +static struct binding_level *current_binding_level; + +/* The binding level of the current class, if any. */ + +static struct binding_level *class_binding_level; + +/* The current (class or non-class) binding level currently in effect. */ + +#define inner_binding_level \ + (class_binding_level ? class_binding_level : current_binding_level) + +/* A chain of binding_level structures awaiting reuse. */ + +static struct binding_level *free_binding_level; + +/* The outermost binding level, for names of file scope. + This is created when the compiler is started and exists + through the entire run. */ + +static struct binding_level *global_binding_level; + +/* Binding level structures are initialized by copying this one. */ + +static struct binding_level clear_binding_level; + +/* Nonzero means unconditionally make a BLOCK for the next level pushed. */ + +static int keep_next_level_flag; + +#if defined(DEBUG_CP_BINDING_LEVELS) +static int binding_depth = 0; +static int is_class_level = 0; + +static void +indent () +{ + register unsigned i; + + for (i = 0; i < binding_depth*2; i++) + putc (' ', stderr); +} +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + +static tree pushdecl_with_scope PROTO((tree, struct binding_level *)); + +static void +push_binding_level (newlevel, tag_transparent, keep) + struct binding_level *newlevel; + int tag_transparent, keep; +{ + /* Add this level to the front of the chain (stack) of levels that + are active. */ + *newlevel = clear_binding_level; + if (class_binding_level) + { + newlevel->level_chain = class_binding_level; + class_binding_level = (struct binding_level *)0; + } + else + { + newlevel->level_chain = current_binding_level; + } + current_binding_level = newlevel; + newlevel->tag_transparent = tag_transparent; + newlevel->more_cleanups_ok = 1; + newlevel->more_exceptions_ok = 1; + newlevel->keep = keep; +#if defined(DEBUG_CP_BINDING_LEVELS) + newlevel->binding_depth = binding_depth; + indent (); + fprintf (stderr, "push %s level 0x%08x line %d\n", + (is_class_level) ? "class" : "block", newlevel, lineno); + is_class_level = 0; + binding_depth++; +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ +} + +static void +pop_binding_level () +{ + if (class_binding_level) + current_binding_level = class_binding_level; + + if (global_binding_level) + { + /* cannot pop a level, if there are none left to pop. */ + if (current_binding_level == global_binding_level) + my_friendly_abort (123); + } + /* Pop the current level, and free the structure for reuse. */ +#if defined(DEBUG_CP_BINDING_LEVELS) + binding_depth--; + indent (); + fprintf (stderr, "pop %s level 0x%08x line %d\n", + (is_class_level) ? "class" : "block", + current_binding_level, lineno); + if (is_class_level != (current_binding_level == class_binding_level)) +#if 0 /* XXX Don't abort when we're watching how things are being managed. */ + abort (); +#else + { + indent (); + fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n"); + } +#endif + is_class_level = 0; +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + { + register struct binding_level *level = current_binding_level; + current_binding_level = current_binding_level->level_chain; + level->level_chain = free_binding_level; +#if 0 /* defined(DEBUG_CP_BINDING_LEVELS) */ + if (level->binding_depth != binding_depth) + abort (); +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + free_binding_level = level; + + class_binding_level = current_binding_level; + if (class_binding_level->parm_flag != 2) + class_binding_level = 0; + while (current_binding_level->parm_flag == 2) + current_binding_level = current_binding_level->level_chain; + } +} + +/* Nonzero if we are currently in the global binding level. */ + +int +global_bindings_p () +{ + return current_binding_level == global_binding_level; +} + +void +keep_next_level () +{ + keep_next_level_flag = 1; +} + +/* Nonzero if the current level needs to have a BLOCK made. */ + +int +kept_level_p () +{ + return (current_binding_level->blocks != NULL_TREE + || current_binding_level->keep + || current_binding_level->names != NULL_TREE + || (current_binding_level->tags != NULL_TREE + && !current_binding_level->tag_transparent)); +} + +/* Identify this binding level as a level of parameters. */ + +void +declare_parm_level () +{ + current_binding_level->parm_flag = 1; +} + +/* Identify this binding level as a level of a default exception handler. */ + +void +declare_implicit_exception () +{ + current_binding_level->parm_flag = 3; +} + +/* Nonzero if current binding contour contains expressions + that might raise exceptions. */ + +int +have_exceptions_p () +{ + return current_binding_level->have_exceptions; +} + +void +declare_uninstantiated_type_level () +{ + current_binding_level->accept_any = 1; +} + +int +uninstantiated_type_level_p () +{ + return current_binding_level->accept_any; +} + +void +declare_pseudo_global_level () +{ + current_binding_level->pseudo_global = 1; +} + +int +pseudo_global_level_p () +{ + return current_binding_level->pseudo_global; +} + +void +set_class_shadows (shadows) + tree shadows; +{ + class_binding_level->class_shadowed = shadows; +} + +/* Enter a new binding level. + If TAG_TRANSPARENT is nonzero, do so only for the name space of variables, + not for that of tags. */ + +void +pushlevel (tag_transparent) + int tag_transparent; +{ + register struct binding_level *newlevel = NULL_BINDING_LEVEL; + + /* If this is the top level of a function, + just make sure that NAMED_LABELS is 0. + They should have been set to 0 at the end of the previous function. */ + + if (current_binding_level == global_binding_level) + my_friendly_assert (named_labels == NULL_TREE, 134); + + /* Reuse or create a struct for this binding level. */ + +#if defined(DEBUG_CP_BINDING_LEVELS) + if (0) +#else /* !defined(DEBUG_CP_BINDING_LEVELS) */ + if (free_binding_level) +#endif /* !defined(DEBUG_CP_BINDING_LEVELS) */ + { + newlevel = free_binding_level; + free_binding_level = free_binding_level->level_chain; + } + else + { + /* Create a new `struct binding_level'. */ + newlevel = (struct binding_level *) xmalloc (sizeof (struct binding_level)); + } + push_binding_level (newlevel, tag_transparent, keep_next_level_flag); + GNU_xref_start_scope ((HOST_WIDE_INT) newlevel); + keep_next_level_flag = 0; +} + +void +pushlevel_temporary (tag_transparent) + int tag_transparent; +{ + pushlevel (tag_transparent); + current_binding_level->keep = 2; + clear_last_expr (); + + /* Note we don't call push_momentary() here. Otherwise, it would cause + cleanups to be allocated on the momentary obstack, and they will be + overwritten by the next statement. */ + + expand_start_bindings (0); +} + +/* Exit a binding level. + Pop the level off, and restore the state of the identifier-decl mappings + that were in effect when this level was entered. + + If KEEP == 1, this level had explicit declarations, so + and create a "block" (a BLOCK node) for the level + to record its declarations and subblocks for symbol table output. + + If KEEP == 2, this level's subblocks go to the front, + not the back of the current binding level. This happens, + for instance, when code for constructors and destructors + need to generate code at the end of a function which must + be moved up to the front of the function. + + If FUNCTIONBODY is nonzero, this level is the body of a function, + so create a block as if KEEP were set and also clear out all + label names. + + If REVERSE is nonzero, reverse the order of decls before putting + them into the BLOCK. */ + +tree +poplevel (keep, reverse, functionbody) + int keep; + int reverse; + int functionbody; +{ + register tree link; + /* The chain of decls was accumulated in reverse order. + Put it into forward order, just for cleanliness. */ + tree decls; + int tmp = functionbody; + int implicit_try_block = current_binding_level->parm_flag == 3; + int real_functionbody = current_binding_level->keep == 2 + ? ((functionbody = 0), tmp) : functionbody; + tree tags = functionbody >= 0 ? current_binding_level->tags : 0; + tree subblocks = functionbody >= 0 ? current_binding_level->blocks : 0; + tree block = NULL_TREE; + tree decl; + int block_previously_created; + + GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level, + (HOST_WIDE_INT) current_binding_level->level_chain, + current_binding_level->parm_flag, + current_binding_level->keep, + current_binding_level->tag_transparent); + + if (current_binding_level->keep == 1) + keep = 1; + + /* This warning is turned off because it causes warnings for + declarations like `extern struct foo *x'. */ +#if 0 + /* Warn about incomplete structure types in this level. */ + for (link = tags; link; link = TREE_CHAIN (link)) + if (TYPE_SIZE (TREE_VALUE (link)) == NULL_TREE) + { + tree type = TREE_VALUE (link); + char *errmsg; + switch (TREE_CODE (type)) + { + case RECORD_TYPE: + errmsg = "`struct %s' incomplete in scope ending here"; + break; + case UNION_TYPE: + errmsg = "`union %s' incomplete in scope ending here"; + break; + case ENUMERAL_TYPE: + errmsg = "`enum %s' incomplete in scope ending here"; + break; + } + if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) + error (errmsg, IDENTIFIER_POINTER (TYPE_NAME (type))); + else + /* If this type has a typedef-name, the TYPE_NAME is a TYPE_DECL. */ + error (errmsg, TYPE_NAME_STRING (type)); + } +#endif /* 0 */ + + /* Get the decls in the order they were written. + Usually current_binding_level->names is in reverse order. + But parameter decls were previously put in forward order. */ + + if (reverse) + current_binding_level->names + = decls = nreverse (current_binding_level->names); + else + decls = current_binding_level->names; + + /* Output any nested inline functions within this block + if they weren't already output. */ + + for (decl = decls; decl; decl = TREE_CHAIN (decl)) + if (TREE_CODE (decl) == FUNCTION_DECL + && ! TREE_ASM_WRITTEN (decl) + && DECL_INITIAL (decl) != NULL_TREE + && TREE_ADDRESSABLE (decl)) + { + /* If this decl was copied from a file-scope decl + on account of a block-scope extern decl, + propagate TREE_ADDRESSABLE to the file-scope decl. */ + if (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE) + TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1; + else + { + push_function_context (); + output_inline_function (decl); + pop_function_context (); + } + } + + /* If there were any declarations or structure tags in that level, + or if this level is a function body, + create a BLOCK to record them for the life of this function. */ + + block = NULL_TREE; + block_previously_created = (current_binding_level->this_block != NULL_TREE); + if (block_previously_created) + block = current_binding_level->this_block; + else if (keep == 1 || functionbody) + block = make_node (BLOCK); + if (block != NULL_TREE) + { + BLOCK_VARS (block) = decls; + BLOCK_TYPE_TAGS (block) = tags; + BLOCK_SUBBLOCKS (block) = subblocks; + /* If we created the block earlier on, and we are just diddling it now, + then it already should have a proper BLOCK_END_NOTE value associated + with it, so avoid trashing that. Otherwise, for a new block, install + a new BLOCK_END_NOTE value. */ + if (! block_previously_created) + remember_end_note (block); + } + + /* In each subblock, record that this is its superior. */ + + if (keep >= 0) + for (link = subblocks; link; link = TREE_CHAIN (link)) + BLOCK_SUPERCONTEXT (link) = block; + + /* Clear out the meanings of the local variables of this level. */ + + for (link = decls; link; link = TREE_CHAIN (link)) + { + if (DECL_NAME (link) != NULL_TREE) + { + /* If the ident. was used or addressed via a local extern decl, + don't forget that fact. */ + if (DECL_EXTERNAL (link)) + { + if (TREE_USED (link)) + TREE_USED (DECL_ASSEMBLER_NAME (link)) = 1; + if (TREE_ADDRESSABLE (link)) + TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (link)) = 1; + } + IDENTIFIER_LOCAL_VALUE (DECL_NAME (link)) = NULL_TREE; + } + } + + /* Restore all name-meanings of the outer levels + that were shadowed by this level. */ + + for (link = current_binding_level->shadowed; link; link = TREE_CHAIN (link)) + IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + for (link = current_binding_level->class_shadowed; + link; link = TREE_CHAIN (link)) + IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + for (link = current_binding_level->type_shadowed; + link; link = TREE_CHAIN (link)) + IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + + /* If the level being exited is the top level of a function, + check over all the labels. */ + + if (functionbody) + { + /* If this is the top level block of a function, + the vars are the function's parameters. + Don't leave them in the BLOCK because they are + found in the FUNCTION_DECL instead. */ + + BLOCK_VARS (block) = 0; + + /* Clear out the definitions of all label names, + since their scopes end here. */ + + for (link = named_labels; link; link = TREE_CHAIN (link)) + { + register tree label = TREE_VALUE (link); + + if (DECL_INITIAL (label) == NULL_TREE) + { + cp_error_at ("label `%D' used but not defined", label); + /* Avoid crashing later. */ + define_label (input_filename, 1, DECL_NAME (label)); + } + else if (warn_unused && !TREE_USED (label)) + cp_warning_at ("label `%D' defined but not used", label); + SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), NULL_TREE); + + /* Put the labels into the "variables" of the + top-level block, so debugger can see them. */ + TREE_CHAIN (label) = BLOCK_VARS (block); + BLOCK_VARS (block) = label; + } + + named_labels = NULL_TREE; + } + + /* Any uses of undefined labels now operate under constraints + of next binding contour. */ + { + struct binding_level *level_chain; + level_chain = current_binding_level->level_chain; + if (level_chain) + { + tree labels; + for (labels = named_label_uses; labels; labels = TREE_CHAIN (labels)) + if (TREE_TYPE (labels) == (tree)current_binding_level) + { + TREE_TYPE (labels) = (tree)level_chain; + TREE_PURPOSE (labels) = level_chain->names; + } + } + } + + tmp = current_binding_level->keep; + + pop_binding_level (); + if (functionbody) + DECL_INITIAL (current_function_decl) = block; + else if (block) + { + if (!block_previously_created) + current_binding_level->blocks + = chainon (current_binding_level->blocks, block); + } + /* If we did not make a block for the level just exited, + any blocks made for inner levels + (since they cannot be recorded as subblocks in that level) + must be carried forward so they will later become subblocks + of something else. */ + else if (subblocks) + { + if (keep == 2) + current_binding_level->blocks + = chainon (subblocks, current_binding_level->blocks); + else + current_binding_level->blocks + = chainon (current_binding_level->blocks, subblocks); + } + + /* Take care of compiler's internal binding structures. */ + if (tmp == 2 && !implicit_try_block) + { +#if 0 + /* We did not call push_momentary for this + binding contour, so there is nothing to pop. */ + pop_momentary (); +#endif + expand_end_bindings (getdecls (), keep, 1); + /* Each and every BLOCK node created here in `poplevel' is important + (e.g. for proper debugging information) so if we created one + earlier, mark it as "used". */ + if (block) + TREE_USED (block) = 1; + block = poplevel (keep, reverse, real_functionbody); + } + + /* Each and every BLOCK node created here in `poplevel' is important + (e.g. for proper debugging information) so if we created one + earlier, mark it as "used". */ + if (block) + TREE_USED (block) = 1; + return block; +} + +/* Delete the node BLOCK from the current binding level. + This is used for the block inside a stmt expr ({...}) + so that the block can be reinserted where appropriate. */ + +void +delete_block (block) + tree block; +{ + tree t; + if (current_binding_level->blocks == block) + current_binding_level->blocks = TREE_CHAIN (block); + for (t = current_binding_level->blocks; t;) + { + if (TREE_CHAIN (t) == block) + TREE_CHAIN (t) = TREE_CHAIN (block); + else + t = TREE_CHAIN (t); + } + TREE_CHAIN (block) = NULL_TREE; + /* Clear TREE_USED which is always set by poplevel. + The flag is set again if insert_block is called. */ + TREE_USED (block) = 0; +} + +/* Insert BLOCK at the end of the list of subblocks of the + current binding level. This is used when a BIND_EXPR is expanded, + to handle the BLOCK node inside the BIND_EXPR. */ + +void +insert_block (block) + tree block; +{ + TREE_USED (block) = 1; + current_binding_level->blocks + = chainon (current_binding_level->blocks, block); +} + +/* Add BLOCK to the current list of blocks for this binding contour. */ +void +add_block_current_level (block) + tree block; +{ + current_binding_level->blocks + = chainon (current_binding_level->blocks, block); +} + +/* Set the BLOCK node for the innermost scope + (the one we are currently in). */ + +void +set_block (block) + register tree block; +{ + current_binding_level->this_block = block; +} + +/* Do a pushlevel for class declarations. */ +void +pushlevel_class () +{ + register struct binding_level *newlevel; + + /* Reuse or create a struct for this binding level. */ +#if defined(DEBUG_CP_BINDING_LEVELS) + if (0) +#else /* !defined(DEBUG_CP_BINDING_LEVELS) */ + if (free_binding_level) +#endif /* !defined(DEBUG_CP_BINDING_LEVELS) */ + { + newlevel = free_binding_level; + free_binding_level = free_binding_level->level_chain; + } + else + { + /* Create a new `struct binding_level'. */ + newlevel = (struct binding_level *) xmalloc (sizeof (struct binding_level)); + } + +#if defined(DEBUG_CP_BINDING_LEVELS) + is_class_level = 1; +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + + push_binding_level (newlevel, 0, 0); + + decl_stack = push_decl_level (decl_stack, &decl_obstack); + class_binding_level = current_binding_level; + class_binding_level->parm_flag = 2; + /* We have just pushed into a new binding level. Now, fake out the rest + of the compiler. Set the `current_binding_level' back to point to + the most closely containing non-class binding level. */ + do + { + current_binding_level = current_binding_level->level_chain; + } + while (current_binding_level->parm_flag == 2); +} + +/* ...and a poplevel for class declarations. */ +tree +poplevel_class () +{ + register struct binding_level *level = class_binding_level; + tree block = NULL_TREE; + tree shadowed; + + my_friendly_assert (level != 0, 354); + + decl_stack = pop_stack_level (decl_stack); + for (shadowed = level->shadowed; shadowed; shadowed = TREE_CHAIN (shadowed)) + IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (shadowed)) = TREE_VALUE (shadowed); + /* If we're leaving a toplevel class, don't bother to do the setting + of IDENTIFER_CLASS_VALUE to NULL_TREE, since first of all this slot + shouldn't even be used when current_class_type isn't set, and second, + if we don't touch it here, we're able to use the caching effect if the + next time we're entering a class scope, it is the same class. */ + if (current_class_depth != 1) + for (shadowed = level->class_shadowed; + shadowed; + shadowed = TREE_CHAIN (shadowed)) + IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (shadowed)) = TREE_VALUE (shadowed); + else + /* Remember to save what IDENTIFIER's were bound in this scope so we + can recover from cache misses. */ + previous_class_values = class_binding_level->class_shadowed; + for (shadowed = level->type_shadowed; + shadowed; + shadowed = TREE_CHAIN (shadowed)) + IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (shadowed)) = TREE_VALUE (shadowed); + + GNU_xref_end_scope ((HOST_WIDE_INT) class_binding_level, + (HOST_WIDE_INT) class_binding_level->level_chain, + class_binding_level->parm_flag, + class_binding_level->keep, + class_binding_level->tag_transparent); + + if (class_binding_level->parm_flag != 2) + class_binding_level = (struct binding_level *)0; + + /* Now, pop out of the the binding level which we created up in the + `pushlevel_class' routine. */ +#if defined(DEBUG_CP_BINDING_LEVELS) + is_class_level = 1; +#endif /* defined(DEBUG_CP_BINDING_LEVELS) */ + + pop_binding_level (); + + return block; +} + +/* For debugging. */ +int no_print_functions = 0; +int no_print_builtins = 0; + +void +print_binding_level (lvl) + struct binding_level *lvl; +{ + tree t; + int i = 0, len; + fprintf (stderr, " blocks="); + fprintf (stderr, HOST_PTR_PRINTF, lvl->blocks); + fprintf (stderr, " n_incomplete=%d parm_flag=%d keep=%d", + lvl->n_incomplete, lvl->parm_flag, lvl->keep); + if (lvl->tag_transparent) + fprintf (stderr, " tag-transparent"); + if (lvl->more_cleanups_ok) + fprintf (stderr, " more-cleanups-ok"); + if (lvl->have_cleanups) + fprintf (stderr, " have-cleanups"); + if (lvl->more_exceptions_ok) + fprintf (stderr, " more-exceptions-ok"); + if (lvl->have_exceptions) + fprintf (stderr, " have-exceptions"); + fprintf (stderr, "\n"); + if (lvl->names) + { + fprintf (stderr, " names:\t"); + /* We can probably fit 3 names to a line? */ + for (t = lvl->names; t; t = TREE_CHAIN (t)) + { + if (no_print_functions && (TREE_CODE(t) == FUNCTION_DECL)) + continue; + if (no_print_builtins + && (TREE_CODE(t) == TYPE_DECL) + && (!strcmp(DECL_SOURCE_FILE(t),"<built-in>"))) + continue; + + /* Function decls tend to have longer names. */ + if (TREE_CODE (t) == FUNCTION_DECL) + len = 3; + else + len = 2; + i += len; + if (i > 6) + { + fprintf (stderr, "\n\t"); + i = len; + } + print_node_brief (stderr, "", t, 0); + if (TREE_CODE (t) == ERROR_MARK) + break; + } + if (i) + fprintf (stderr, "\n"); + } + if (lvl->tags) + { + fprintf (stderr, " tags:\t"); + i = 0; + for (t = lvl->tags; t; t = TREE_CHAIN (t)) + { + if (TREE_PURPOSE (t) == NULL_TREE) + len = 3; + else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t))) + len = 2; + else + len = 4; + i += len; + if (i > 5) + { + fprintf (stderr, "\n\t"); + i = len; + } + if (TREE_PURPOSE (t) == NULL_TREE) + { + print_node_brief (stderr, "<unnamed-typedef", TREE_VALUE (t), 0); + fprintf (stderr, ">"); + } + else if (TREE_PURPOSE (t) == TYPE_IDENTIFIER (TREE_VALUE (t))) + print_node_brief (stderr, "", TREE_VALUE (t), 0); + else + { + print_node_brief (stderr, "<typedef", TREE_PURPOSE (t), 0); + print_node_brief (stderr, "", TREE_VALUE (t), 0); + fprintf (stderr, ">"); + } + } + if (i) + fprintf (stderr, "\n"); + } + if (lvl->shadowed) + { + fprintf (stderr, " shadowed:"); + for (t = lvl->shadowed; t; t = TREE_CHAIN (t)) + { + fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t))); + } + fprintf (stderr, "\n"); + } + if (lvl->class_shadowed) + { + fprintf (stderr, " class-shadowed:"); + for (t = lvl->class_shadowed; t; t = TREE_CHAIN (t)) + { + fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t))); + } + fprintf (stderr, "\n"); + } + if (lvl->type_shadowed) + { + fprintf (stderr, " type-shadowed:"); + for (t = lvl->type_shadowed; t; t = TREE_CHAIN (t)) + { +#if 0 + fprintf (stderr, "\n\t"); + print_node_brief (stderr, "<", TREE_PURPOSE (t), 0); + if (TREE_VALUE (t)) + print_node_brief (stderr, " ", TREE_VALUE (t), 0); + else + fprintf (stderr, " (none)"); + fprintf (stderr, ">"); +#else + fprintf (stderr, " %s ", IDENTIFIER_POINTER (TREE_PURPOSE (t))); +#endif + } + fprintf (stderr, "\n"); + } +} + +void +print_other_binding_stack (stack) + struct binding_level *stack; +{ + struct binding_level *level; + for (level = stack; level != global_binding_level; level = level->level_chain) + { + fprintf (stderr, "binding level "); + fprintf (stderr, HOST_PTR_PRINTF, level); + fprintf (stderr, "\n"); + print_binding_level (level); + } +} + +void +print_binding_stack () +{ + struct binding_level *b; + fprintf (stderr, "current_binding_level="); + fprintf (stderr, HOST_PTR_PRINTF, current_binding_level); + fprintf (stderr, "\nclass_binding_level="); + fprintf (stderr, HOST_PTR_PRINTF, class_binding_level); + fprintf (stderr, "\nglobal_binding_level="); + fprintf (stderr, HOST_PTR_PRINTF, global_binding_level); + fprintf (stderr, "\n"); + if (class_binding_level) + { + for (b = class_binding_level; b; b = b->level_chain) + if (b == current_binding_level) + break; + if (b) + b = class_binding_level; + else + b = current_binding_level; + } + else + b = current_binding_level; + print_other_binding_stack (b); + fprintf (stderr, "global:\n"); + print_binding_level (global_binding_level); +} + +/* Subroutines for reverting temporarily to top-level for instantiation + of templates and such. We actually need to clear out the class- and + local-value slots of all identifiers, so that only the global values + are at all visible. Simply setting current_binding_level to the global + scope isn't enough, because more binding levels may be pushed. */ +struct saved_scope { + struct binding_level *old_binding_level; + tree old_bindings; + struct saved_scope *prev; + tree class_name, class_type, class_decl, function_decl; + struct binding_level *class_bindings; + tree previous_class_type; +}; +static struct saved_scope *current_saved_scope; +extern tree prev_class_type; + +void +push_to_top_level () +{ + struct saved_scope *s = + (struct saved_scope *) xmalloc (sizeof (struct saved_scope)); + struct binding_level *b = current_binding_level; + tree old_bindings = NULL_TREE; + + /* Have to include global_binding_level, because class-level decls + aren't listed anywhere useful. */ + for (; b; b = b->level_chain) + { + tree t; + + if (b == global_binding_level) + continue; + + for (t = b->names; t; t = TREE_CHAIN (t)) + { + tree binding, t1, t2 = t; + tree id = DECL_ASSEMBLER_NAME (t2); + + if (!id + || (!IDENTIFIER_LOCAL_VALUE (id) + && !IDENTIFIER_CLASS_VALUE (id))) + continue; + + for (t1 = old_bindings; t1; t1 = TREE_CHAIN (t1)) + if (TREE_VEC_ELT (t1, 0) == id) + goto skip_it; + + binding = make_tree_vec (4); + if (id) + { + my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 135); + TREE_VEC_ELT (binding, 0) = id; + TREE_VEC_ELT (binding, 1) = IDENTIFIER_TYPE_VALUE (id); + TREE_VEC_ELT (binding, 2) = IDENTIFIER_LOCAL_VALUE (id); + TREE_VEC_ELT (binding, 3) = IDENTIFIER_CLASS_VALUE (id); + IDENTIFIER_LOCAL_VALUE (id) = NULL_TREE; + IDENTIFIER_CLASS_VALUE (id) = NULL_TREE; + } + TREE_CHAIN (binding) = old_bindings; + old_bindings = binding; + skip_it: + ; + } + /* Unwind type-value slots back to top level. */ + for (t = b->type_shadowed; t; t = TREE_CHAIN (t)) + SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (t), TREE_VALUE (t)); + } + /* Clear out class-level bindings cache. */ + if (current_binding_level == global_binding_level + && previous_class_type != NULL_TREE) + { + popclass (-1); + previous_class_type = NULL_TREE; + } + + s->old_binding_level = current_binding_level; + current_binding_level = global_binding_level; + + s->class_name = current_class_name; + s->class_type = current_class_type; + s->class_decl = current_class_decl; + s->function_decl = current_function_decl; + s->class_bindings = class_binding_level; + s->previous_class_type = previous_class_type; + current_class_name = current_class_type = current_class_decl = NULL_TREE; + current_function_decl = NULL_TREE; + class_binding_level = (struct binding_level *)0; + previous_class_type = NULL_TREE; + + s->prev = current_saved_scope; + s->old_bindings = old_bindings; + current_saved_scope = s; +} + +void +pop_from_top_level () +{ + struct saved_scope *s = current_saved_scope; + tree t; + + if (previous_class_type) + previous_class_type = NULL_TREE; + + current_binding_level = s->old_binding_level; + current_saved_scope = s->prev; + for (t = s->old_bindings; t; t = TREE_CHAIN (t)) + { + tree id = TREE_VEC_ELT (t, 0); + if (id) + { + IDENTIFIER_TYPE_VALUE (id) = TREE_VEC_ELT (t, 1); + IDENTIFIER_LOCAL_VALUE (id) = TREE_VEC_ELT (t, 2); + IDENTIFIER_CLASS_VALUE (id) = TREE_VEC_ELT (t, 3); + } + } + current_class_name = s->class_name; + current_class_type = s->class_type; + current_class_decl = s->class_decl; + if (current_class_type) + C_C_D = CLASSTYPE_INST_VAR (current_class_type); + else + C_C_D = NULL_TREE; + current_function_decl = s->function_decl; + class_binding_level = s->class_bindings; + previous_class_type = s->previous_class_type; + free (s); +} + +/* Push a definition of struct, union or enum tag "name". + into binding_level "b". "type" should be the type node, + We assume that the tag "name" is not already defined. + + Note that the definition may really be just a forward reference. + In that case, the TYPE_SIZE will be a NULL_TREE. + + C++ gratuitously puts all these tags in the name space. */ + +/* When setting the IDENTIFIER_TYPE_VALUE field of an identifier ID, + record the shadowed value for this binding contour. TYPE is + the type that ID maps to. */ + +static void +set_identifier_type_value_with_scope (id, type, b) + tree id; + tree type; + struct binding_level *b; +{ + if (b != global_binding_level) + { + tree old_type_value = IDENTIFIER_TYPE_VALUE (id); + b->type_shadowed + = tree_cons (id, old_type_value, b->type_shadowed); + } + SET_IDENTIFIER_TYPE_VALUE (id, type); +} + +/* As set_identifier_type_value_with_scope, but using inner_binding_level. */ + +void +set_identifier_type_value (id, type) + tree id; + tree type; +{ + set_identifier_type_value_with_scope (id, type, inner_binding_level); +} + +/* Subroutine "set_nested_typename" builds the nested-typename of + the type decl in question. (Argument CLASSNAME can actually be + a function as well, if that's the smallest containing scope.) */ + +static void +set_nested_typename (decl, classname, name, type) + tree decl, classname, name, type; +{ + my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 136); + if (classname != NULL_TREE) + { + char *buf; + my_friendly_assert (TREE_CODE (classname) == IDENTIFIER_NODE, 137); + my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 138); + buf = (char *) alloca (4 + IDENTIFIER_LENGTH (classname) + + IDENTIFIER_LENGTH (name)); + sprintf (buf, "%s::%s", IDENTIFIER_POINTER (classname), + IDENTIFIER_POINTER (name)); + DECL_NESTED_TYPENAME (decl) = get_identifier (buf); + + /* This is a special usage of IDENTIFIER_TYPE_VALUE which have no + correspondence in any binding_level. This is ok since the + DECL_NESTED_TYPENAME is just a convenience identifier whose + IDENTIFIER_TYPE_VALUE will remain constant from now on. */ + SET_IDENTIFIER_TYPE_VALUE (DECL_NESTED_TYPENAME (decl), type); + } + else + DECL_NESTED_TYPENAME (decl) = name; +} + +#if 0 /* not yet, should get fixed properly later */ +/* Create a TYPE_DECL node with the correct DECL_ASSEMBLER_NAME. + Other routines shouldn't use build_decl directly; they'll produce + incorrect results with `-g' unless they duplicate this code. + + This is currently needed mainly for dbxout.c, but we can make + use of it in cp-method.c later as well. */ +tree +make_type_decl (name, type) + tree name, type; +{ + tree decl, id; + decl = build_decl (TYPE_DECL, name, type); + if (TYPE_NAME (type) == name) + /* Class/union/enum definition, or a redundant typedef for same. */ + { + id = get_identifier (build_overload_name (type, 1, 1)); + DECL_ASSEMBLER_NAME (decl) = id; + } + else if (TYPE_NAME (type) != NULL_TREE) + /* Explicit typedef, or implicit typedef for template expansion. */ + DECL_ASSEMBLER_NAME (decl) = DECL_ASSEMBLER_NAME (TYPE_NAME (type)); + else + { + /* XXX: Typedef for unnamed struct; some other situations. + TYPE_NAME is null; what's right here? */ + } + return decl; +} +#endif + +/* Push a tag name NAME for struct/class/union/enum type TYPE. + Normally put into into the inner-most non-tag-tranparent scope, + but if GLOBALIZE is true, put it in the inner-most non-class scope. + The latter is needed for implicit declarations. */ + +void +pushtag (name, type, globalize) + tree name, type; + int globalize; +{ + register struct binding_level *b; + tree t_context = 0; + + b = inner_binding_level; + while (b->tag_transparent + || (globalize && b->parm_flag == 2)) + b = b->level_chain; + + if (b == global_binding_level) + b->tags = perm_tree_cons (name, type, b->tags); + else + b->tags = saveable_tree_cons (name, type, b->tags); + + if (name) + { + t_context = type ? TYPE_CONTEXT(type) : NULL_TREE; + if (!t_context && !globalize) + t_context = current_class_type; + + /* Record the identifier as the type's name if it has none. */ + if (TYPE_NAME (type) == NULL_TREE) + TYPE_NAME (type) = name; + + /* Do C++ gratuitous typedefing. */ + if (IDENTIFIER_TYPE_VALUE (name) != type + && (TREE_CODE (type) != RECORD_TYPE + || b->parm_flag != 2 + || !CLASSTYPE_DECLARED_EXCEPTION (type))) + { + register tree d; + int newdecl = 0; + + if (b->parm_flag != 2 + || TYPE_SIZE (current_class_type) != NULL_TREE) + { + if (current_lang_name == lang_name_cplusplus) + d = lookup_nested_type (type, + t_context ? TYPE_NAME (t_context) : NULL_TREE); + else + d = NULL_TREE; + + if (d == NULL_TREE) + { + newdecl = 1; +#if 0 /* not yet, should get fixed properly later */ + d = make_type_decl (name, type); +#else + d = build_decl (TYPE_DECL, name, type); +#endif +#ifdef DWARF_DEBUGGING_INFO + if (write_symbols == DWARF_DEBUG) + { + /* Mark the TYPE_DECL node we created just above as an + gratuitous one. We need to do this so that dwarfout.c + will understand that it is not supposed to output a + TAG_typedef DIE for it. */ + DECL_IGNORED_P (d) = 1; + } +#endif /* DWARF_DEBUGGING_INFO */ + set_identifier_type_value_with_scope (name, type, b); + } + else + d = TYPE_NAME (d); + + /* If it is anonymous, then we are called from pushdecl, + and we don't want to infinitely recurse. Also, if the + name is already in scope, we don't want to push it + again--pushdecl is only for pushing new decls. */ + if (! ANON_AGGRNAME_P (name) + && TYPE_NAME (type) + && (TREE_CODE (TYPE_NAME (type)) != TYPE_DECL + || lookup_name (name, 1) != TYPE_NAME (type))) + { + if (b->parm_flag == 2) + d = pushdecl_class_level (d); + else + d = pushdecl_with_scope (d, b); + } + } + else + { + /* Make nested declarations go into class-level scope. */ + newdecl = 1; + d = build_lang_field_decl (TYPE_DECL, name, type); +#ifdef DWARF_DEBUGGING_INFO + if (write_symbols == DWARF_DEBUG) + { + /* Mark the TYPE_DECL node we created just above as an + gratuitous one. We need to do this so that dwarfout.c + will understand that it is not supposed to output a + TAG_typedef DIE for it. */ + DECL_IGNORED_P (d) = 1; + } +#endif /* DWARF_DEBUGGING_INFO */ + /* Make sure we're in this type's scope when we push the + decl for a template, otherwise class_binding_level will + be NULL and we'll end up dying inside of + push_class_level_binding. */ + if (TREE_CODE (type) == UNINSTANTIATED_P_TYPE) + pushclass (type, 0); + d = pushdecl_class_level (d); + if (TREE_CODE (type) == UNINSTANTIATED_P_TYPE) + popclass (0); + } + if (write_symbols != DWARF_DEBUG) + { + if (ANON_AGGRNAME_P (name)) + DECL_IGNORED_P (d) = 1; + } + TYPE_NAME (type) = d; + + if ((t_context == NULL_TREE + && current_function_decl == NULL_TREE) + || current_lang_name != lang_name_cplusplus) + /* Non-nested class. */ + DECL_NESTED_TYPENAME (d) = name; + else if (current_function_decl != NULL_TREE) + { + /* Function-nested class. */ + set_nested_typename (d, + DECL_ASSEMBLER_NAME (current_function_decl), name, type); + /* This builds the links for classes nested in fn scope. */ + DECL_CONTEXT (d) = current_function_decl; + } +/* else if (TYPE_SIZE (current_class_type) == NULL_TREE) +*/ + else if (t_context && TREE_CODE (t_context) == RECORD_TYPE) + { + /* Class-nested class. */ + set_nested_typename (d, + DECL_NESTED_TYPENAME (TYPE_NAME (t_context)), name, type); + /* This builds the links for classes nested in type scope. */ + DECL_CONTEXT (d) = t_context; + DECL_CLASS_CONTEXT (d) = t_context; + } + TYPE_CONTEXT (type) = DECL_CONTEXT (d); + if (newdecl) + DECL_ASSEMBLER_NAME (d) + = get_identifier (build_overload_name (type, 1, 1)); + } + if (b->parm_flag == 2) + { + TREE_NONLOCAL_FLAG (type) = 1; + if (TYPE_SIZE (current_class_type) == NULL_TREE) + CLASSTYPE_TAGS (current_class_type) = b->tags; + } + } + + if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL) + /* Use the canonical TYPE_DECL for this node. */ + TYPE_STUB_DECL (type) = TYPE_NAME (type); + else + { + /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE + will be the tagged type we just added to the current + binding level. This fake NULL-named TYPE_DECL node helps + dwarfout.c to know when it needs to output a + representation of a tagged type, and it also gives us a + convenient place to record the "scope start" address for + the tagged type. */ + +#if 0 /* not yet, should get fixed properly later */ + tree d = make_type_decl (NULL_TREE, type); +#else + tree d = build_decl (TYPE_DECL, NULL_TREE, type); +#endif + TYPE_STUB_DECL (type) = pushdecl_with_scope (d, b); + } +} + +/* Counter used to create anonymous type names. */ +static int anon_cnt = 0; + +/* Return an IDENTIFIER which can be used as a name for + anonymous structs and unions. */ +tree +make_anon_name () +{ + char buf[32]; + + sprintf (buf, ANON_AGGRNAME_FORMAT, anon_cnt++); + return get_identifier (buf); +} + +/* Clear the TREE_PURPOSE slot of tags which have anonymous typenames. + This keeps dbxout from getting confused. */ +void +clear_anon_tags () +{ + register struct binding_level *b; + register tree tags; + static int last_cnt = 0; + + /* Fast out if no new anon names were declared. */ + if (last_cnt == anon_cnt) + return; + + b = current_binding_level; + while (b->tag_transparent) + b = b->level_chain; + tags = b->tags; + while (tags) + { + /* A NULL purpose means we have already processed all tags + from here to the end of the list. */ + if (TREE_PURPOSE (tags) == NULL_TREE) + break; + if (ANON_AGGRNAME_P (TREE_PURPOSE (tags))) + TREE_PURPOSE (tags) = NULL_TREE; + tags = TREE_CHAIN (tags); + } + last_cnt = anon_cnt; +} + +/* Subroutine of duplicate_decls: return truthvalue of whether + or not types of these decls match. + + For C++, we must compare the parameter list so that `int' can match + `int&' in a parameter position, but `int&' is not confused with + `const int&'. */ +static int +decls_match (newdecl, olddecl) + tree newdecl, olddecl; +{ + int types_match; + + if (TREE_CODE (newdecl) == FUNCTION_DECL && TREE_CODE (olddecl) == FUNCTION_DECL) + { + tree f1 = TREE_TYPE (newdecl); + tree f2 = TREE_TYPE (olddecl); + tree p1 = TYPE_ARG_TYPES (f1); + tree p2 = TYPE_ARG_TYPES (f2); + + /* When we parse a static member function definition, + we put together a FUNCTION_DECL which thinks its type + is METHOD_TYPE. Change that to FUNCTION_TYPE, and + proceed. */ + if (TREE_CODE (f1) == METHOD_TYPE && DECL_STATIC_FUNCTION_P (olddecl)) + revert_static_member_fn (&f1, &newdecl, &p1); + else if (TREE_CODE (f2) == METHOD_TYPE + && DECL_STATIC_FUNCTION_P (newdecl)) + revert_static_member_fn (&f2, &olddecl, &p2); + + /* Here we must take care of the case where new default + parameters are specified. Also, warn if an old + declaration becomes ambiguous because default + parameters may cause the two to be ambiguous. */ + if (TREE_CODE (f1) != TREE_CODE (f2)) + { + if (TREE_CODE (f1) == OFFSET_TYPE) + cp_compiler_error ("`%D' redeclared as member function", newdecl); + else + cp_compiler_error ("`%D' redeclared as non-member function", newdecl); + return 0; + } + + if (comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (f1)), + TYPE_MAIN_VARIANT (TREE_TYPE (f2)), 2)) + types_match = compparms (p1, p2, 2); + else + types_match = 0; + } + else + { + if (TREE_TYPE (newdecl) == error_mark_node) + types_match = TREE_TYPE (olddecl) == error_mark_node; + else if (TREE_TYPE (olddecl) == NULL_TREE) + types_match = TREE_TYPE (newdecl) == NULL_TREE; + else + types_match = comptypes (TREE_TYPE (newdecl), TREE_TYPE (olddecl), 1); + } + + return types_match; +} + +/* If NEWDECL is `static' and an `extern' was seen previously, + warn about it. (OLDDECL may be NULL_TREE; NAME contains + information about previous usage as an `extern'.) + + Note that this does not apply to the C++ case of declaring + a variable `extern const' and then later `const'. + + Don't complain if -traditional, since traditional compilers + don't complain. + + Don't complain about built-in functions, since they are beyond + the user's control. */ + +static void +warn_extern_redeclared_static (newdecl, olddecl) + tree newdecl, olddecl; +{ + tree name; + + static char *explicit_extern_static_warning + = "`%D' was declared `extern' and later `static'"; + static char *implicit_extern_static_warning + = "`%D' was declared implicitly `extern' and later `static'"; + + if (flag_traditional + || TREE_CODE (newdecl) == TYPE_DECL + || (! warn_extern_inline + && DECL_INLINE (newdecl))) + return; + + name = DECL_ASSEMBLER_NAME (newdecl); + if (TREE_PUBLIC (name) && ! TREE_PUBLIC (newdecl)) + { + /* It's okay to redeclare an ANSI built-in function as static, + or to declare a non-ANSI built-in function as anything. */ + if (! (TREE_CODE (newdecl) == FUNCTION_DECL + && olddecl != NULL_TREE + && TREE_CODE (olddecl) == FUNCTION_DECL + && (DECL_BUILT_IN (olddecl) + || DECL_BUILT_IN_NONANSI (olddecl)))) + { + cp_warning (IDENTIFIER_IMPLICIT_DECL (name) + ? implicit_extern_static_warning + : explicit_extern_static_warning, newdecl); + if (olddecl != NULL_TREE) + cp_warning_at ("previous declaration of `%D'", olddecl); + } + } +} + +/* Handle when a new declaration NEWDECL has the same name as an old + one OLDDECL in the same binding contour. Prints an error message + if appropriate. + + If safely possible, alter OLDDECL to look like NEWDECL, and return 1. + Otherwise, return 0. */ + +static int +duplicate_decls (newdecl, olddecl) + register tree newdecl, olddecl; +{ + extern struct obstack permanent_obstack; + unsigned olddecl_uid = DECL_UID (olddecl); + int olddecl_friend = 0, types_match = 0; + int new_defines_function; + tree previous_c_decl = NULL_TREE; + + if (TREE_CODE (newdecl) == FUNCTION_DECL + && is_overloaded_fn (olddecl)) + { + olddecl = get_first_fn (olddecl); + + while (olddecl) + { + if (DECL_LANGUAGE (olddecl) == lang_c) + previous_c_decl = olddecl; + + /* Redeclaration. */ + if (decls_match (newdecl, olddecl)) + { + types_match = 1; + break; + } + /* Ambiguous overload. */ + else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)), + TYPE_ARG_TYPES (TREE_TYPE (olddecl)), 2)) + break; + + /* Attempt to define multiple C-binding fns. */ + if (previous_c_decl) + break; + + olddecl = DECL_CHAIN (olddecl); + } + if (!olddecl) + { + /* If we found no match, make this join the other + overloaded decls. */ + DECL_OVERLOADED (newdecl) = 1; + return 1; + } + } + else + types_match = decls_match (newdecl, olddecl); + + if (TREE_CODE (olddecl) != TREE_LIST) + olddecl_friend = DECL_LANG_SPECIFIC (olddecl) && DECL_FRIEND_P (olddecl); + + /* If either the type of the new decl or the type of the old decl is an + error_mark_node, then that implies that we have already issued an + error (earlier) for some bogus type specification, and in that case, + it is rather pointless to harass the user with yet more error message + about the same declaration, so well just pretent the types match here. */ + if ((TREE_TYPE (newdecl) + && TREE_CODE (TREE_TYPE (newdecl)) == ERROR_MARK) + || (TREE_TYPE (olddecl) + && TREE_CODE (TREE_TYPE (olddecl)) == ERROR_MARK)) + types_match = 1; + + if (TREE_CODE (olddecl) != TREE_CODE (newdecl)) + { + cp_error ("`%#D' redeclared as different kind of symbol", newdecl); + if (TREE_CODE (olddecl) == TREE_LIST) + olddecl = TREE_VALUE (olddecl); + cp_error_at ("previous declaration of `%#D'", olddecl); + + /* New decl is completely inconsistent with the old one => + tell caller to replace the old one. */ + + return 0; + } + + if (flag_traditional && TREE_CODE (newdecl) == FUNCTION_DECL + && IDENTIFIER_IMPLICIT_DECL (DECL_ASSEMBLER_NAME (newdecl)) == olddecl) + /* If -traditional, avoid error for redeclaring fcn + after implicit decl. */ + ; + else if (TREE_CODE (olddecl) == FUNCTION_DECL + && (DECL_BUILT_IN (olddecl) + || DECL_BUILT_IN_NONANSI (olddecl))) + { + /* If you declare a built-in or predefined function name as static, + the old definition is overridden, + but optionally warn this was a bad choice of name. */ + if (! TREE_PUBLIC (newdecl)) + { + if (warn_shadow) + cp_warning ("shadowing %s function `%#D'", + DECL_BUILT_IN (olddecl) ? "built-in" : "library", + newdecl); + /* Discard the old built-in function. */ + return 0; + } + /* Likewise, if the built-in is not ansi, then programs can + override it even globally without an error. */ + else if (! DECL_BUILT_IN (olddecl)) + cp_warning ("library function `%#D' declared as non-function", + newdecl); + + if (!types_match) + { + cp_warning ("declaration of `%#D'", newdecl); + cp_warning ("conflicts with built-in declaration `%#D'", + olddecl); + return 0; + } + } + else if (!types_match && previous_c_decl + && DECL_LANGUAGE (newdecl) == lang_c) + { + cp_error ("declaration of C function `%#D' conflicts with", newdecl); + cp_error_at ("previous declaration `%#D' here", previous_c_decl); + } + else if (!types_match) + { + tree oldtype = TREE_TYPE (olddecl); + tree newtype = TREE_TYPE (newdecl); + int give_error = 0; + + /* Already complained about this, so don't do so again. */ + if (current_class_type == NULL_TREE + || IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl)) != current_class_type) + { + give_error = 1; + + /* Since we're doing this before finish_struct can set the + line number on NEWDECL, we just do a regular error here. */ + if (DECL_SOURCE_LINE (newdecl) == 0) + cp_error ("conflicting types for `%#D'", newdecl); + else + cp_error_at ("conflicting types for `%#D'", newdecl); + } + + /* Check for function type mismatch + involving an empty arglist vs a nonempty one. */ + if (TREE_CODE (olddecl) == FUNCTION_DECL + && comptypes (TREE_TYPE (oldtype), + TREE_TYPE (newtype), 1) + && ((TYPE_ARG_TYPES (oldtype) == NULL_TREE + && DECL_INITIAL (olddecl) == NULL_TREE) + || (TYPE_ARG_TYPES (newtype) == NULL_TREE + && DECL_INITIAL (newdecl) == NULL_TREE))) + { + /* Classify the problem further. */ + register tree t = TYPE_ARG_TYPES (oldtype); + + if (t == NULL_TREE) + t = TYPE_ARG_TYPES (newtype); + for (; t; t = TREE_CHAIN (t)) + { + register tree type = TREE_VALUE (t); + + if (TREE_CHAIN (t) == NULL_TREE && type != void_type_node) + { + give_error = 1; + error ("A parameter list with an ellipsis can't match"); + error ("an empty parameter name list declaration."); + break; + } + + if (TYPE_MAIN_VARIANT (type) == float_type_node + || C_PROMOTING_INTEGER_TYPE_P (type)) + { + give_error = 1; + error ("An argument type that has a default promotion"); + error ("can't match an empty parameter name list declaration."); + break; + } + } + } + if (give_error) + cp_error_at ("previous declaration as `%#D'", olddecl); + + /* There is one thing GNU C++ cannot tolerate: a constructor + which takes the type of object being constructed. + Farm that case out here. */ + if (TREE_CODE (newdecl) == FUNCTION_DECL + && DECL_CONSTRUCTOR_P (newdecl)) + { + tree tmp = TREE_CHAIN (TYPE_ARG_TYPES (newtype)); + + if (tmp != NULL_TREE + && (TYPE_MAIN_VARIANT (TREE_VALUE (tmp)) + == TYPE_METHOD_BASETYPE (newtype))) + { + tree parm = TREE_CHAIN (DECL_ARGUMENTS (newdecl)); + tree argtypes + = hash_tree_chain (build_reference_type (TREE_VALUE (tmp)), + TREE_CHAIN (tmp)); + + DECL_ARG_TYPE (parm) + = TREE_TYPE (parm) + = TYPE_REFERENCE_TO (TREE_VALUE (tmp)); + + TREE_TYPE (newdecl) = newtype + = build_cplus_method_type (TYPE_METHOD_BASETYPE (newtype), + TREE_TYPE (newtype), argtypes); + error ("constructor cannot take as argument the type being constructed"); + SET_IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (newdecl), current_class_type); + } + } + } + else + { + char *errmsg = redeclaration_error_message (newdecl, olddecl); + if (errmsg) + { + error_with_decl (newdecl, errmsg); + if (DECL_NAME (olddecl) != NULL_TREE) + cp_error_at ((DECL_INITIAL (olddecl) + && current_binding_level == global_binding_level) + ? "`%#D' previously defined here" + : "`%#D' previously declared here", olddecl); + } + else if (TREE_CODE (olddecl) == FUNCTION_DECL + && DECL_INITIAL (olddecl) != NULL_TREE + && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE + && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE) + { + /* Prototype decl follows defn w/o prototype. */ + cp_warning_at ("prototype for `%#D'", newdecl); + cp_warning_at ("follows non-prototype definition here", olddecl); + } + else if (TREE_CODE (olddecl) == FUNCTION_DECL + && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl)) + /* extern "C" int foo (); + int foo () { bar (); } + is OK. */ + if (current_lang_stack == current_lang_base) + DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl); + else + { + cp_error_at ("previous declaration of `%#D' with %L linkage", + olddecl, DECL_LANGUAGE (olddecl)); + cp_error ("conflicts with new declaration with %L linkage", + DECL_LANGUAGE (newdecl)); + } + + /* These bits are logically part of the type. */ + if (pedantic + && (TREE_READONLY (newdecl) != TREE_READONLY (olddecl) + || TREE_THIS_VOLATILE (newdecl) != TREE_THIS_VOLATILE (olddecl))) + cp_error_at ("type qualifiers for `%D' conflict with previous decl", newdecl); + } + + /* If new decl is `static' and an `extern' was seen previously, + warn about it. */ + warn_extern_redeclared_static (newdecl, olddecl); + + /* We have committed to returning 1 at this point. */ + if (TREE_CODE (newdecl) == FUNCTION_DECL) + { + /* Now that functions must hold information normally held + by field decls, there is extra work to do so that + declaration information does not get destroyed during + definition. */ + if (DECL_VINDEX (olddecl)) + DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl); + if (DECL_CONTEXT (olddecl)) + DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl); + if (DECL_CLASS_CONTEXT (olddecl)) + DECL_CLASS_CONTEXT (newdecl) = DECL_CLASS_CONTEXT (olddecl); + if (DECL_CHAIN (newdecl) == NULL_TREE) + DECL_CHAIN (newdecl) = DECL_CHAIN (olddecl); + if (DECL_PENDING_INLINE_INFO (newdecl) == (struct pending_inline *)0) + DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl); + } + + /* Deal with C++: must preserve virtual function table size. */ + if (TREE_CODE (olddecl) == TYPE_DECL) + { + register tree newtype = TREE_TYPE (newdecl); + register tree oldtype = TREE_TYPE (olddecl); + + if (newtype != error_mark_node && oldtype != error_mark_node + && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype)) + { + CLASSTYPE_VSIZE (newtype) = CLASSTYPE_VSIZE (oldtype); + CLASSTYPE_FRIEND_CLASSES (newtype) + = CLASSTYPE_FRIEND_CLASSES (oldtype); + } + /* why assert here? Just because debugging information is + messed up? (mrs) */ + /* it happens on something like: + typedef struct Thing { + Thing(); + int x; + } Thing; + */ +#if 0 + my_friendly_assert (DECL_IGNORED_P (olddecl) == DECL_IGNORED_P (newdecl), 139); +#endif + } + + /* Special handling ensues if new decl is a function definition. */ + new_defines_function = (TREE_CODE (newdecl) == FUNCTION_DECL + && DECL_INITIAL (newdecl) != NULL_TREE); + + /* Optionally warn about more than one declaration for the same name, + but don't warn about a function declaration followed by a definition. */ + if (warn_redundant_decls + && DECL_SOURCE_LINE (olddecl) != 0 + && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE) + /* Don't warn about extern decl followed by (tentative) definition. */ + && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))) + { + cp_warning ("redundant redeclaration of `%D' in same scope", newdecl); + cp_warning ("previous declaration of `%D'", olddecl); + } + + /* Copy all the DECL_... slots specified in the new decl + except for any that we copy here from the old type. */ + + if (types_match) + { + /* Automatically handles default parameters. */ + tree oldtype = TREE_TYPE (olddecl); + /* Merge the data types specified in the two decls. */ + tree newtype = common_type (TREE_TYPE (newdecl), TREE_TYPE (olddecl)); + + if (TREE_CODE (newdecl) == VAR_DECL) + DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl); + /* Do this after calling `common_type' so that default + parameters don't confuse us. */ + else if (TREE_CODE (newdecl) == FUNCTION_DECL + && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)) + != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)))) + { + tree ctype = NULL_TREE; + ctype = DECL_CLASS_CONTEXT (newdecl); + TREE_TYPE (newdecl) = build_exception_variant (ctype, newtype, + TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))); + TREE_TYPE (olddecl) = build_exception_variant (ctype, newtype, + TYPE_RAISES_EXCEPTIONS (oldtype)); + + if (! compexcepttypes (TREE_TYPE (newdecl), TREE_TYPE(olddecl), 0)) + { + cp_error ("declaration of `%D' raises different exceptions...", newdecl); + cp_error_at ("...from previous declaration here", olddecl); + } + } + TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype; + + /* Lay the type out, unless already done. */ + if (oldtype != TREE_TYPE (newdecl)) + { + if (TREE_TYPE (newdecl) != error_mark_node) + layout_type (TREE_TYPE (newdecl)); + if (TREE_CODE (newdecl) != FUNCTION_DECL + && TREE_CODE (newdecl) != TYPE_DECL + && TREE_CODE (newdecl) != CONST_DECL) + layout_decl (newdecl, 0); + } + else + { + /* Since the type is OLDDECL's, make OLDDECL's size go with. */ + DECL_SIZE (newdecl) = DECL_SIZE (olddecl); + } + + /* Merge the type qualifiers. */ + if (TREE_READONLY (newdecl)) + TREE_READONLY (olddecl) = 1; + if (TREE_THIS_VOLATILE (newdecl)) + TREE_THIS_VOLATILE (olddecl) = 1; + + /* Merge the initialization information. */ + if (DECL_INITIAL (newdecl) == NULL_TREE) + DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); + /* Keep the old rtl since we can safely use it, unless it's the + call to abort() used for abstract virtuals. */ + if ((DECL_LANG_SPECIFIC (olddecl) + && !DECL_ABSTRACT_VIRTUAL_P (olddecl)) + || DECL_RTL (olddecl) != DECL_RTL (abort_fndecl)) + DECL_RTL (newdecl) = DECL_RTL (olddecl); + } + /* If cannot merge, then use the new type and qualifiers, + and don't preserve the old rtl. */ + else + { + /* Clean out any memory we had of the old declaration. */ + tree oldstatic = value_member (olddecl, static_aggregates); + if (oldstatic) + TREE_VALUE (oldstatic) = error_mark_node; + + TREE_TYPE (olddecl) = TREE_TYPE (newdecl); + TREE_READONLY (olddecl) = TREE_READONLY (newdecl); + TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl); + TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl); + } + + /* Merge the storage class information. */ + if (DECL_EXTERNAL (newdecl)) + { + TREE_STATIC (newdecl) = TREE_STATIC (olddecl); + DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl); + + /* For functions, static overrides non-static. */ + if (TREE_CODE (newdecl) == FUNCTION_DECL) + { + TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl); + /* This is since we don't automatically + copy the attributes of NEWDECL into OLDDECL. */ + TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); + /* If this clears `static', clear it in the identifier too. */ + if (! TREE_PUBLIC (olddecl)) + TREE_PUBLIC (DECL_ASSEMBLER_NAME (olddecl)) = 0; + } + else + TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl); + } + else + { + TREE_STATIC (olddecl) = TREE_STATIC (newdecl); + /* A `const' which was not declared `extern' and is + in static storage is invisible. */ + if (TREE_CODE (newdecl) == VAR_DECL + && TREE_READONLY (newdecl) && TREE_STATIC (newdecl) + && ! DECL_THIS_EXTERN (newdecl)) + TREE_PUBLIC (newdecl) = 0; + TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl); + } + + /* If either decl says `inline', this fn is inline, + unless its definition was passed already. */ + if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE) + DECL_INLINE (olddecl) = 1; + DECL_INLINE (newdecl) = DECL_INLINE (olddecl); + + if (TREE_CODE (newdecl) == FUNCTION_DECL) + { + if (new_defines_function) + /* If defining a function declared with other language + linkage, use the previously declared language linkage. */ + DECL_LANGUAGE (newdecl) = DECL_LANGUAGE (olddecl); + else + { + /* If redeclaring a builtin function, and not a definition, + it stays built in. */ + if (DECL_BUILT_IN (olddecl)) + { + DECL_BUILT_IN (newdecl) = 1; + DECL_SET_FUNCTION_CODE (newdecl, DECL_FUNCTION_CODE (olddecl)); + /* If we're keeping the built-in definition, keep the rtl, + regardless of declaration matches. */ + DECL_RTL (newdecl) = DECL_RTL (olddecl); + } + else + DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl); + + DECL_RESULT (newdecl) = DECL_RESULT (olddecl); + if (DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl)) + /* Previously saved insns go together with + the function's previous definition. */ + DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl); + /* Don't clear out the arguments if we're redefining a function. */ + if (DECL_ARGUMENTS (olddecl)) + DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl); + } + } + + /* Now preserve various other info from the definition. */ + TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl); + TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl); + DECL_COMMON (newdecl) = DECL_COMMON (olddecl); + + /* Don't really know how much of the language-specific + values we should copy from old to new. */ + if (DECL_LANG_SPECIFIC (olddecl)) + { + DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl); + DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl); + } + + if (TREE_CODE (newdecl) == FUNCTION_DECL) + { + int function_size; + struct lang_decl *ol = DECL_LANG_SPECIFIC (olddecl); + struct lang_decl *nl = DECL_LANG_SPECIFIC (newdecl); + + function_size = sizeof (struct tree_decl); + + bcopy ((char *) newdecl + sizeof (struct tree_common), + (char *) olddecl + sizeof (struct tree_common), + function_size - sizeof (struct tree_common)); + + /* Can we safely free the storage used by newdecl? */ + +#define ROUND(x) ((x + obstack_alignment_mask (&permanent_obstack)) \ + & ~ obstack_alignment_mask (&permanent_obstack)) + + if ((char *)newdecl + ROUND (function_size) + + ROUND (sizeof (struct lang_decl)) + == obstack_next_free (&permanent_obstack)) + { + DECL_MAIN_VARIANT (newdecl) = olddecl; + DECL_LANG_SPECIFIC (olddecl) = ol; + bcopy ((char *)nl, (char *)ol, sizeof (struct lang_decl)); + + obstack_free (&permanent_obstack, newdecl); + } + else if (LANG_DECL_PERMANENT (ol)) + { + if (DECL_MAIN_VARIANT (olddecl) == olddecl) + { + /* Save these lang_decls that would otherwise be lost. */ + extern tree free_lang_decl_chain; + tree free_lang_decl = (tree) ol; + TREE_CHAIN (free_lang_decl) = free_lang_decl_chain; + free_lang_decl_chain = free_lang_decl; + } + else + { + /* Storage leak. */ + } + } + } + else + { + bcopy ((char *) newdecl + sizeof (struct tree_common), + (char *) olddecl + sizeof (struct tree_common), + sizeof (struct tree_decl) - sizeof (struct tree_common) + + tree_code_length [(int)TREE_CODE (newdecl)] * sizeof (char *)); + } + + DECL_UID (olddecl) = olddecl_uid; + if (olddecl_friend) + DECL_FRIEND_P (olddecl) = 1; + + return 1; +} + +/* Record a decl-node X as belonging to the current lexical scope. + Check for errors (such as an incompatible declaration for the same + name already seen in the same scope). + + Returns either X or an old decl for the same name. + If an old decl is returned, it may have been smashed + to agree with what X says. */ + +tree +pushdecl (x) + tree x; +{ + register tree t; +#if 0 /* not yet, should get fixed properly later */ + register tree name; +#else + register tree name = DECL_ASSEMBLER_NAME (x); +#endif + register struct binding_level *b = current_binding_level; + +#if 0 + static int nglobals; int len; + + len = list_length (global_binding_level->names); + if (len < nglobals) + my_friendly_abort (8); + else if (len > nglobals) + nglobals = len; +#endif + + /* Don't change DECL_CONTEXT of virtual methods. */ + if (x != current_function_decl + && (TREE_CODE (x) != FUNCTION_DECL + || !DECL_VIRTUAL_P (x)) + && ! DECL_CONTEXT (x)) + DECL_CONTEXT (x) = current_function_decl; + /* A local declaration for a function doesn't constitute nesting. */ + if (TREE_CODE (x) == FUNCTION_DECL && DECL_INITIAL (x) == 0) + DECL_CONTEXT (x) = 0; + +#if 0 /* not yet, should get fixed properly later */ + /* For functions and class static data, we currently look up the encoded + form of the name. For types, we want the real name. The former will + probably be changed soon, according to MDT. */ + if (TREE_CODE (x) == FUNCTION_DECL || TREE_CODE (x) == VAR_DECL) + name = DECL_ASSEMBLER_NAME (x); + else + name = DECL_NAME (x); +#else + /* Type are looked up using the DECL_NAME, as that is what the rest of the + compiler wants to use. */ + if (TREE_CODE (x) == TYPE_DECL) + name = DECL_NAME (x); +#endif + + if (name) + { + char *file; + int line; + + t = lookup_name_current_level (name); + if (t == error_mark_node) + { + /* error_mark_node is 0 for a while during initialization! */ + t = NULL_TREE; + cp_error_at ("`%#D' used prior to declaration", x); + } + + if (t != NULL_TREE) + { + if (TREE_CODE (t) == PARM_DECL) + { + if (DECL_CONTEXT (t) == NULL_TREE) + fatal ("parse errors have confused me too much"); + } + file = DECL_SOURCE_FILE (t); + line = DECL_SOURCE_LINE (t); + } + + if (t != NULL_TREE + && (TREE_CODE (t) != TREE_CODE (x) || is_overloaded_fn (t))) + { + if (TREE_CODE (t) == TYPE_DECL || TREE_CODE (x) == TYPE_DECL) + { + /* We do nothing special here, because C++ does such nasty + things with TYPE_DECLs. Instead, just let the TYPE_DECL + get shadowed, and know that if we need to find a TYPE_DECL + for a given name, we can look in the IDENTIFIER_TYPE_VALUE + slot of the identifier. */ + ; + } + else if (duplicate_decls (x, t)) + return t; + } + else if (t != NULL_TREE && duplicate_decls (x, t)) + { +#if 0 + /* This is turned off until I have time to do it right (bpk). */ + + /* Also warn if they did a prototype with `static' on it, but + then later left the `static' off. */ + else if (! TREE_PUBLIC (name) && TREE_PUBLIC (x)) + { + if (DECL_LANG_SPECIFIC (t) && DECL_FRIEND_P (t)) + return t; + + if (extra_warnings) + { + cp_warning ("`static' missing from declaration of `%D'", t); + warning_with_file_and_line (file, line, + "previous declaration of `%s'", + decl_as_string (t, 0)); + } + + /* Now fix things so it'll do what they expect. */ + if (current_function_decl) + TREE_PUBLIC (current_function_decl) = 0; + } +#endif + + /* Due to interference in memory reclamation (X may be + obstack-deallocated at this point), we must guard against + one really special case. */ + if (current_function_decl == x) + current_function_decl = t; + + return t; + } + + /* If declaring a type as a typedef, and the type has no known + typedef name, install this TYPE_DECL as its typedef name. */ + if (TREE_CODE (x) == TYPE_DECL) + { + tree type = TREE_TYPE (x); + tree name = (type != error_mark_node) ? TYPE_NAME (type) : x; + + if (name == NULL_TREE || TREE_CODE (name) != TYPE_DECL) + { + /* If these are different names, and we're at the global + binding level, make two equivalent definitions. */ + name = x; + if (global_bindings_p ()) + TYPE_NAME (type) = x; + } + else + { + tree tname = DECL_NAME (name); + + if (global_bindings_p () && ANON_AGGRNAME_P (tname)) + { + /* do gratuitous C++ typedefing, and make sure that + we access this type either through TREE_TYPE field + or via the tags list. */ + TYPE_NAME (TREE_TYPE (x)) = x; + pushtag (tname, TREE_TYPE (x), 0); + } + } + my_friendly_assert (TREE_CODE (name) == TYPE_DECL, 140); + + if (DECL_NAME (name) && !DECL_NESTED_TYPENAME (name)) + set_nested_typename (x, current_class_name, + DECL_NAME (name), type); + + if (type != error_mark_node + && TYPE_NAME (type) + && TYPE_IDENTIFIER (type)) + set_identifier_type_value_with_scope (DECL_NAME (x), type, b); + } + + /* Multiple external decls of the same identifier ought to match. + + We get warnings about inline functions where they are defined. + Avoid duplicate warnings where they are used. */ + if (TREE_PUBLIC (x) && !DECL_INLINE (x)) + { + tree decl; + + if (IDENTIFIER_GLOBAL_VALUE (name) != NULL_TREE + && (DECL_EXTERNAL (IDENTIFIER_GLOBAL_VALUE (name)) + || TREE_PUBLIC (IDENTIFIER_GLOBAL_VALUE (name)))) + decl = IDENTIFIER_GLOBAL_VALUE (name); + else + decl = NULL_TREE; + + if (decl && ! comptypes (TREE_TYPE (x), TREE_TYPE (decl), 1) + /* If different sort of thing, we already gave an error. */ + && TREE_CODE (decl) == TREE_CODE (x) + /* If old decl is built-in, we already warned if we should. */ + && !DECL_BUILT_IN (decl)) + { + cp_pedwarn ("type mismatch with previous external decl", x); + cp_pedwarn_at ("previous external decl of `%D'", decl); + } + } + + /* In PCC-compatibility mode, extern decls of vars with no current decl + take effect at top level no matter where they are. */ + if (flag_traditional && DECL_EXTERNAL (x) + && lookup_name (name, 0) == NULL_TREE) + b = global_binding_level; + + /* This name is new in its binding level. + Install the new declaration and return it. */ + if (b == global_binding_level) + { + /* Install a global value. */ + + /* Rule for VAR_DECLs, but not for other kinds of _DECLs: + A `const' which was not declared `extern' is invisible. */ + if (TREE_CODE (x) == VAR_DECL + && TREE_READONLY (x) && ! DECL_THIS_EXTERN (x)) + TREE_PUBLIC (x) = 0; + + /* If the first global decl has external linkage, + warn if we later see static one. */ + if (IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE && TREE_PUBLIC (x)) + TREE_PUBLIC (name) = 1; + + /* Don't install a TYPE_DECL if we already have another + sort of _DECL with that name. */ + if (TREE_CODE (x) != TYPE_DECL + || t == NULL_TREE + || TREE_CODE (t) == TYPE_DECL) + IDENTIFIER_GLOBAL_VALUE (name) = x; + + /* Don't forget if the function was used via an implicit decl. */ + if (IDENTIFIER_IMPLICIT_DECL (name) + && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name))) + TREE_USED (x) = 1; + + /* Don't forget if its address was taken in that way. */ + if (IDENTIFIER_IMPLICIT_DECL (name) + && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name))) + TREE_ADDRESSABLE (x) = 1; + + /* Warn about mismatches against previous implicit decl. */ + if (IDENTIFIER_IMPLICIT_DECL (name) != NULL_TREE + /* If this real decl matches the implicit, don't complain. */ + && ! (TREE_CODE (x) == FUNCTION_DECL + && TREE_TYPE (TREE_TYPE (x)) == integer_type_node)) + cp_warning + ("`%D' was previously implicitly declared to return `int'", x); + + /* If new decl is `static' and an `extern' was seen previously, + warn about it. */ + warn_extern_redeclared_static (x, t); + } + else + { + /* Here to install a non-global value. */ + tree oldlocal = IDENTIFIER_LOCAL_VALUE (name); + tree oldglobal = IDENTIFIER_GLOBAL_VALUE (name); + + b->shadowed = tree_cons (name, oldlocal, b->shadowed); + IDENTIFIER_LOCAL_VALUE (name) = x; + + /* If this is a TYPE_DECL, push it into the type value slot. */ + if (TREE_CODE (x) == TYPE_DECL) + set_identifier_type_value_with_scope (name, TREE_TYPE (x), b); + + /* If this is an extern function declaration, see if we + have a global definition or declaration for the function. */ + if (oldlocal == NULL_TREE + && DECL_EXTERNAL (x) && !DECL_INLINE (x) + && oldglobal != NULL_TREE + && TREE_CODE (x) == FUNCTION_DECL + && TREE_CODE (oldglobal) == FUNCTION_DECL) + { + /* We have one. Their types must agree. */ + if (! comptypes (TREE_TYPE (x), TREE_TYPE (oldglobal), 1)) + { + cp_warning ("extern declaration of `%#D' doesn't match", x); + cp_warning_at ("global declaration `%#D'", oldglobal); + } + else + { + /* Inner extern decl is inline if global one is. + Copy enough to really inline it. */ + if (DECL_INLINE (oldglobal)) + { + DECL_INLINE (x) = DECL_INLINE (oldglobal); + DECL_INITIAL (x) = (current_function_decl == oldglobal + ? NULL_TREE : DECL_INITIAL (oldglobal)); + DECL_SAVED_INSNS (x) = DECL_SAVED_INSNS (oldglobal); + DECL_FRAME_SIZE (x) = DECL_FRAME_SIZE (oldglobal); + DECL_ARGUMENTS (x) = DECL_ARGUMENTS (oldglobal); + DECL_RESULT (x) = DECL_RESULT (oldglobal); + TREE_ASM_WRITTEN (x) = TREE_ASM_WRITTEN (oldglobal); + DECL_ABSTRACT_ORIGIN (x) = oldglobal; + } + /* Inner extern decl is built-in if global one is. */ + if (DECL_BUILT_IN (oldglobal)) + { + DECL_BUILT_IN (x) = DECL_BUILT_IN (oldglobal); + DECL_SET_FUNCTION_CODE (x, DECL_FUNCTION_CODE (oldglobal)); + } + /* Keep the arg types from a file-scope fcn defn. */ + if (TYPE_ARG_TYPES (TREE_TYPE (oldglobal)) != NULL_TREE + && DECL_INITIAL (oldglobal) + && TYPE_ARG_TYPES (TREE_TYPE (x)) == NULL_TREE) + TREE_TYPE (x) = TREE_TYPE (oldglobal); + } + } + /* If we have a local external declaration, + and no file-scope declaration has yet been seen, + then if we later have a file-scope decl it must not be static. */ + if (oldlocal == NULL_TREE + && oldglobal == NULL_TREE + && DECL_EXTERNAL (x) + && TREE_PUBLIC (x)) + { + TREE_PUBLIC (name) = 1; + } + + if (DECL_FROM_INLINE (x)) + /* Inline decls shadow nothing. */; + + /* Warn if shadowing an argument at the top level of the body. */ + else if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x) + && TREE_CODE (oldlocal) == PARM_DECL + && TREE_CODE (x) != PARM_DECL) + { + /* Go to where the parms should be and see if we + find them there. */ + struct binding_level *b = current_binding_level->level_chain; + + if (cleanup_label) + b = b->level_chain; + + /* ARM $8.3 */ + if (b->parm_flag == 1) + cp_error ("declaration of `%#D' shadows a parameter", name); + } + /* Maybe warn if shadowing something else. */ + else if (warn_shadow && !DECL_EXTERNAL (x) + /* No shadow warnings for internally generated vars. */ + && DECL_SOURCE_LINE (x) != 0 + /* No shadow warnings for vars made for inlining. */ + && ! DECL_FROM_INLINE (x)) + { + char *warnstring = NULL; + + if (oldlocal != NULL_TREE && TREE_CODE (oldlocal) == PARM_DECL) + warnstring = "declaration of `%s' shadows a parameter"; + else if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE + && !TREE_STATIC (name)) + warnstring = "declaration of `%s' shadows a member of `this'"; + else if (oldlocal != NULL_TREE) + warnstring = "declaration of `%s' shadows previous local"; + else if (oldglobal != NULL_TREE) + warnstring = "declaration of `%s' shadows global declaration"; + + if (warnstring) + warning (warnstring, IDENTIFIER_POINTER (name)); + } + + /* If storing a local value, there may already be one (inherited). + If so, record it for restoration when this binding level ends. */ + if (oldlocal != NULL_TREE) + b->shadowed = tree_cons (name, oldlocal, b->shadowed); + } + + /* Keep count of variables in this level with incomplete type. */ + if (TREE_CODE (x) != TEMPLATE_DECL + && TREE_CODE (x) != CPLUS_CATCH_DECL + && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE + && PROMOTES_TO_AGGR_TYPE (TREE_TYPE (x), ARRAY_TYPE)) + { + if (++b->n_incomplete == 0) + error ("too many incomplete variables at this point"); + } + } + + if (TREE_CODE (x) == TYPE_DECL && name != NULL_TREE) + { + if (current_class_name) + { + if (!DECL_NESTED_TYPENAME (x)) + set_nested_typename (x, current_class_name, DECL_NAME (x), + TREE_TYPE (x)); + } + } + + /* Put decls on list in reverse order. + We will reverse them later if necessary. */ + TREE_CHAIN (x) = b->names; + b->names = x; + if (! (b != global_binding_level || TREE_PERMANENT (x))) + my_friendly_abort (124); + + return x; +} + +/* Same as pushdecl, but define X in binding-level LEVEL. */ + +static tree +pushdecl_with_scope (x, level) + tree x; + struct binding_level *level; +{ + register struct binding_level *b = current_binding_level; + + current_binding_level = level; + x = pushdecl (x); + current_binding_level = b; + return x; +} + +/* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL, + if appropriate. */ +tree +pushdecl_top_level (x) + tree x; +{ + register struct binding_level *b = inner_binding_level; + register tree t = pushdecl_with_scope (x, global_binding_level); + + /* Now, the type_shadowed stack may screw us. Munge it so it does + what we want. */ + if (TREE_CODE (x) == TYPE_DECL) + { + tree name = DECL_NAME (x); + tree newval; + tree *ptr = (tree *)0; + for (; b != global_binding_level; b = b->level_chain) + { + tree shadowed = b->type_shadowed; + for (; shadowed; shadowed = TREE_CHAIN (shadowed)) + if (TREE_PURPOSE (shadowed) == name) + { + ptr = &TREE_VALUE (shadowed); + /* Can't break out of the loop here because sometimes + a binding level will have duplicate bindings for + PT names. It's gross, but I haven't time to fix it. */ + } + } + newval = TREE_TYPE (x); + if (ptr == (tree *)0) + { + /* @@ This shouldn't be needed. My test case "zstring.cc" trips + up here if this is changed to an assertion. --KR */ + SET_IDENTIFIER_TYPE_VALUE (name, newval); + } + else + { +#if 0 + /* Disabled this 11/10/92, since there are many cases which + behave just fine when *ptr doesn't satisfy either of these. + For example, nested classes declared as friends of their enclosing + class will not meet this criteria. (bpk) */ + my_friendly_assert (*ptr == NULL_TREE || *ptr == newval, 141); +#endif + *ptr = newval; + } + } + return t; +} + +/* Like push_overloaded_decl, only it places X in GLOBAL_BINDING_LEVEL, + if appropriate. */ +void +push_overloaded_decl_top_level (x, forget) + tree x; + int forget; +{ + struct binding_level *b = current_binding_level; + + current_binding_level = global_binding_level; + push_overloaded_decl (x, forget); + current_binding_level = b; +} + +/* Make the declaration of X appear in CLASS scope. */ +tree +pushdecl_class_level (x) + tree x; +{ + /* Don't use DECL_ASSEMBLER_NAME here! Everything that looks in class + scope looks for the pre-mangled name. */ + register tree name = DECL_NAME (x); + + if (name) + { + push_class_level_binding (name, x); + if (TREE_CODE (x) == TYPE_DECL) + { + set_identifier_type_value (name, TREE_TYPE (x)); + if (!DECL_NESTED_TYPENAME (x)) + set_nested_typename (x, current_class_name, name, TREE_TYPE (x)); + } + } + return x; +} + +/* Make the declaration(s) of X appear in CLASS scope + under the name NAME. */ +void +push_class_level_binding (name, x) + tree name; + tree x; +{ + maybe_push_cache_obstack (); + class_binding_level->class_shadowed + = tree_cons (name, IDENTIFIER_CLASS_VALUE (name), + class_binding_level->class_shadowed); + pop_obstacks (); + IDENTIFIER_CLASS_VALUE (name) = x; + obstack_ptr_grow (&decl_obstack, x); +} + +/* Tell caller how to interpret a TREE_LIST which contains + chains of FUNCTION_DECLS. */ +int +overloaded_globals_p (list) + tree list; +{ + my_friendly_assert (TREE_CODE (list) == TREE_LIST, 142); + + /* Don't commit caller to seeing them as globals. */ + if (TREE_NONLOCAL_FLAG (list)) + return -1; + /* Do commit caller to seeing them as globals. */ + if (TREE_CODE (TREE_PURPOSE (list)) == IDENTIFIER_NODE) + return 1; + /* Do commit caller to not seeing them as globals. */ + return 0; +} + +/* DECL is a FUNCTION_DECL which may have other definitions already in place. + We get around this by making IDENTIFIER_GLOBAL_VALUE (DECL_NAME (DECL)) + point to a list of all the things that want to be referenced by that name. + It is then up to the users of that name to decide what to do with that + list. + + DECL may also be a TEMPLATE_DECL, with a FUNCTION_DECL in its DECL_RESULT + slot. It is dealt with the same way. + + The value returned may be a previous declaration if we guessed wrong + about what language DECL should belong to (C or C++). Otherwise, + it's always DECL (and never something that's not a _DECL). */ +tree +push_overloaded_decl (decl, forgettable) + tree decl; + int forgettable; +{ + tree orig_name = DECL_NAME (decl); + tree glob = IDENTIFIER_GLOBAL_VALUE (orig_name); + + DECL_OVERLOADED (decl) = 1; + + if (forgettable + && ! flag_traditional + && (glob == NULL_TREE || TREE_PERMANENT (glob) == 1) + && !global_bindings_p () + && !pseudo_global_level_p ()) + overloads_to_forget = tree_cons (orig_name, glob, overloads_to_forget); + + if (glob) + { + if (DECL_LANGUAGE (decl) == lang_c) + { + tree decls = get_first_fn (glob); + while (decls && DECL_LANGUAGE (decls) == lang_cplusplus) + decls = DECL_CHAIN (decls); + if (decls) + { + cp_error_at ("C-language function `%#D'", decls); + cp_error ("overloaded as `%#D'", decl); + } + } + + /* We cache the value of builtin functions as ADDR_EXPRs + in the name space. Convert it to some kind of _DECL after + remembering what to forget. */ + if (TREE_CODE (glob) == ADDR_EXPR) + glob = TREE_OPERAND (glob, 0); + + else if (TREE_CODE (decl) == TEMPLATE_DECL) + { + tree tmp; + + for (tmp = get_first_fn (glob); tmp; tmp = DECL_CHAIN (tmp)) + if (decl == tmp) + return decl; + } + else if (TREE_CODE (glob) == VAR_DECL) + { + cp_error_at ("previous non-function declaration `%#D'", glob); + cp_error ("conflicts with function declaration `%#D'", decl); + return error_mark_node; + } + else if (is_overloaded_fn (glob)) + { + tree name = DECL_ASSEMBLER_NAME (decl); + tree tmp; + + for (tmp = get_first_fn (glob); tmp; tmp = DECL_CHAIN (tmp)) + { + if (TREE_CODE (tmp) == FUNCTION_DECL + && comptypes (TREE_TYPE (tmp), TREE_TYPE (decl), 2)) + { + if (DECL_LANGUAGE (tmp) != DECL_LANGUAGE (decl)) + { + if (current_lang_stack == current_lang_base) + { + DECL_LANGUAGE (decl) = DECL_LANGUAGE (tmp); + return tmp; + } + cp_error_at ("previous declaration of `%#D' with %L linkage", + tmp, DECL_LANGUAGE (tmp)); + cp_error ("conflicts with new %L-language declaration", + DECL_LANGUAGE (decl)); + } + else if (TREE_CODE (tmp) != TEMPLATE_DECL + && DECL_ASSEMBLER_NAME (tmp) != name) + { + cp_error ("new declaration `%#D'", decl); + cp_error_at ("ambiguates old declaration `%#D'", tmp); + } + } + /* If we really have seen this before, then if it ambiguates + something, we've already given an error before. */ + if (TREE_CODE (tmp) != TEMPLATE_DECL + && DECL_ASSEMBLER_NAME (tmp) == name) + return decl; + } + } + } + if (glob || TREE_CODE (decl) == TEMPLATE_DECL) + { + if (glob && is_overloaded_fn (glob)) + DECL_CHAIN (decl) = get_first_fn (glob); + else + DECL_CHAIN (decl) = NULL_TREE; + glob = tree_cons (orig_name, decl, NULL_TREE); + TREE_TYPE (glob) = unknown_type_node; + } + else + /* orig_name is not ambiguous. */ + glob = decl; + + IDENTIFIER_GLOBAL_VALUE (orig_name) = glob; + return decl; +} + +/* Generate an implicit declaration for identifier FUNCTIONID + as a function of type int (). Print a warning if appropriate. */ + +tree +implicitly_declare (functionid) + tree functionid; +{ + register tree decl; + int temp = allocation_temporary_p (); + + push_obstacks_nochange (); + + /* Save the decl permanently so we can warn if definition follows. + In ANSI C, warn_implicit is usually false, so the saves little space. + But in C++, it's usually true, hence the extra code. */ + if (temp && (flag_traditional || !warn_implicit + || current_binding_level == global_binding_level)) + end_temporary_allocation (); + + /* We used to reuse an old implicit decl here, + but this loses with inline functions because it can clobber + the saved decl chains. */ + decl = build_lang_decl (FUNCTION_DECL, functionid, default_function_type); + + DECL_EXTERNAL (decl) = 1; + TREE_PUBLIC (decl) = 1; + + /* ANSI standard says implicit declarations are in the innermost block. + So we record the decl in the standard fashion. + If flag_traditional is set, pushdecl does it top-level. */ + pushdecl (decl); + rest_of_decl_compilation (decl, NULL_PTR, 0, 0); + + if (warn_implicit + /* Only one warning per identifier. */ + && IDENTIFIER_IMPLICIT_DECL (functionid) == NULL_TREE) + { + cp_pedwarn ("implicit declaration of function `%#D'", decl); + } + + SET_IDENTIFIER_IMPLICIT_DECL (functionid, decl); + + pop_obstacks (); + + return decl; +} + +/* Return zero if the declaration NEWDECL is valid + when the declaration OLDDECL (assumed to be for the same name) + has already been seen. + Otherwise return an error message format string with a %s + where the identifier should go. */ + +static char * +redeclaration_error_message (newdecl, olddecl) + tree newdecl, olddecl; +{ + if (TREE_CODE (newdecl) == TYPE_DECL) + { + /* Because C++ can put things into name space for free, + constructs like "typedef struct foo { ... } foo" + would look like an erroneous redeclaration. */ + if (comptypes (newdecl, olddecl, 0)) + return 0; + else + return "redefinition of `%s'"; + } + else if (TREE_CODE (newdecl) == FUNCTION_DECL) + { + /* If this is a pure function, its olddecl will actually be + the original initialization to `0' (which we force to call + abort()). Don't complain about redefinition in this case. */ + if (DECL_LANG_SPECIFIC (olddecl) && DECL_ABSTRACT_VIRTUAL_P (olddecl)) + return 0; + + /* Declarations of functions can insist on internal linkage + but they can't be inconsistent with internal linkage, + so there can be no error on that account. + However defining the same name twice is no good. */ + if (DECL_INITIAL (olddecl) != NULL_TREE + && DECL_INITIAL (newdecl) != NULL_TREE + /* However, defining once as extern inline and a second + time in another way is ok. */ + && !(DECL_INLINE (olddecl) && DECL_EXTERNAL (olddecl) + && !(DECL_INLINE (newdecl) && DECL_EXTERNAL (newdecl)))) + { + if (DECL_NAME (olddecl) == NULL_TREE) + return "`%s' not declared in class"; + else + return "redefinition of `%s'"; + } + return 0; + } + else if (current_binding_level == global_binding_level) + { + /* Objects declared at top level: */ + /* If at least one is a reference, it's ok. */ + if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl)) + return 0; + /* Reject two definitions. */ + if (DECL_INITIAL (olddecl) != NULL_TREE + && DECL_INITIAL (newdecl) != NULL_TREE) + return "redefinition of `%s'"; + /* Now we have two tentative defs, or one tentative and one real def. */ + /* Insist that the linkage match. */ + if (TREE_PUBLIC (olddecl) != TREE_PUBLIC (newdecl)) + return "conflicting declarations of `%s'"; + return 0; + } + else + { + /* Objects declared with block scope: */ + /* Reject two definitions, and reject a definition + together with an external reference. */ + if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl))) + return "redeclaration of `%s'"; + return 0; + } +} + +/* Get the LABEL_DECL corresponding to identifier ID as a label. + Create one if none exists so far for the current function. + This function is called for both label definitions and label references. */ + +tree +lookup_label (id) + tree id; +{ + register tree decl = IDENTIFIER_LABEL_VALUE (id); + + if (current_function_decl == NULL_TREE) + { + error ("label `%s' referenced outside of any function", + IDENTIFIER_POINTER (id)); + return NULL_TREE; + } + + if ((decl == NULL_TREE + || DECL_SOURCE_LINE (decl) == 0) + && (named_label_uses == NULL_TREE + || TREE_PURPOSE (named_label_uses) != current_binding_level->names + || TREE_VALUE (named_label_uses) != decl)) + { + named_label_uses + = tree_cons (current_binding_level->names, decl, named_label_uses); + TREE_TYPE (named_label_uses) = (tree)current_binding_level; + } + + /* Use a label already defined or ref'd with this name. */ + if (decl != NULL_TREE) + { + /* But not if it is inherited and wasn't declared to be inheritable. */ + if (DECL_CONTEXT (decl) != current_function_decl + && ! C_DECLARED_LABEL_FLAG (decl)) + return shadow_label (id); + return decl; + } + + decl = build_decl (LABEL_DECL, id, void_type_node); + + /* A label not explicitly declared must be local to where it's ref'd. */ + DECL_CONTEXT (decl) = current_function_decl; + + DECL_MODE (decl) = VOIDmode; + + /* Say where one reference is to the label, + for the sake of the error if it is not defined. */ + DECL_SOURCE_LINE (decl) = lineno; + DECL_SOURCE_FILE (decl) = input_filename; + + SET_IDENTIFIER_LABEL_VALUE (id, decl); + + named_labels = tree_cons (NULL_TREE, decl, named_labels); + TREE_VALUE (named_label_uses) = decl; + + return decl; +} + +/* Make a label named NAME in the current function, + shadowing silently any that may be inherited from containing functions + or containing scopes. + + Note that valid use, if the label being shadowed + comes from another scope in the same function, + requires calling declare_nonlocal_label right away. */ + +tree +shadow_label (name) + tree name; +{ + register tree decl = IDENTIFIER_LABEL_VALUE (name); + + if (decl != NULL_TREE) + { + shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels); + SET_IDENTIFIER_LABEL_VALUE (name, NULL_TREE); + SET_IDENTIFIER_LABEL_VALUE (decl, NULL_TREE); + } + + return lookup_label (name); +} + +/* Define a label, specifying the location in the source file. + Return the LABEL_DECL node for the label, if the definition is valid. + Otherwise return 0. */ + +tree +define_label (filename, line, name) + char *filename; + int line; + tree name; +{ + tree decl = lookup_label (name); + + /* After labels, make any new cleanups go into their + own new (temporary) binding contour. */ + current_binding_level->more_cleanups_ok = 0; + + /* If label with this name is known from an outer context, shadow it. */ + if (decl != NULL_TREE && DECL_CONTEXT (decl) != current_function_decl) + { + shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels); + SET_IDENTIFIER_LABEL_VALUE (name, NULL_TREE); + decl = lookup_label (name); + } + + if (DECL_INITIAL (decl) != NULL_TREE) + { + cp_error ("duplicate label `%D'", decl); + return 0; + } + else + { + tree uses, prev; + + /* Mark label as having been defined. */ + DECL_INITIAL (decl) = error_mark_node; + /* Say where in the source. */ + DECL_SOURCE_FILE (decl) = filename; + DECL_SOURCE_LINE (decl) = line; + + for (prev = NULL_TREE, uses = named_label_uses; + uses; + prev = uses, uses = TREE_CHAIN (uses)) + if (TREE_VALUE (uses) == decl) + { + struct binding_level *b = current_binding_level; + while (b) + { + tree new_decls = b->names; + tree old_decls = ((tree)b == TREE_TYPE (uses) + ? TREE_PURPOSE (uses) : NULL_TREE); + while (new_decls != old_decls) + { + if (TREE_CODE (new_decls) == VAR_DECL + /* Don't complain about crossing initialization + of internal entities. They can't be accessed, + and they should be cleaned up + by the time we get to the label. */ + && DECL_SOURCE_LINE (new_decls) != 0 + && ((DECL_INITIAL (new_decls) != NULL_TREE + && DECL_INITIAL (new_decls) != error_mark_node) + || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (new_decls)))) + { + if (IDENTIFIER_ERROR_LOCUS (decl) == NULL_TREE) + cp_error ("invalid jump to label `%D'", decl); + SET_IDENTIFIER_ERROR_LOCUS (decl, current_function_decl); + cp_error ("crosses initialization of `%D'", new_decls); + } + new_decls = TREE_CHAIN (new_decls); + } + if ((tree)b == TREE_TYPE (uses)) + break; + b = b->level_chain; + } + + if (prev) + TREE_CHAIN (prev) = TREE_CHAIN (uses); + else + named_label_uses = TREE_CHAIN (uses); + } + current_function_return_value = NULL_TREE; + return decl; + } +} + +/* Same, but for CASE labels. If DECL is NULL_TREE, it's the default. */ +/* XXX Note decl is never actually used. (bpk) */ +void +define_case_label (decl) + tree decl; +{ + tree cleanup = last_cleanup_this_contour (); + if (cleanup) + { + static int explained = 0; + cp_error_at ("destructor needed for `%#D'", TREE_PURPOSE (cleanup)); + error ("where case label appears here"); + if (!explained) + { + error ("(enclose actions of previous case statements requiring"); + error ("destructors in their own binding contours.)"); + explained = 1; + } + } + + /* After labels, make any new cleanups go into their + own new (temporary) binding contour. */ + + current_binding_level->more_cleanups_ok = 0; + current_function_return_value = NULL_TREE; +} + +/* Return the list of declarations of the current level. + Note that this list is in reverse order unless/until + you nreverse it; and when you do nreverse it, you must + store the result back using `storedecls' or you will lose. */ + +tree +getdecls () +{ + return current_binding_level->names; +} + +/* Return the list of type-tags (for structs, etc) of the current level. */ + +tree +gettags () +{ + return current_binding_level->tags; +} + +/* Store the list of declarations of the current level. + This is done for the parameter declarations of a function being defined, + after they are modified in the light of any missing parameters. */ + +static void +storedecls (decls) + tree decls; +{ + current_binding_level->names = decls; +} + +/* Similarly, store the list of tags of the current level. */ + +static void +storetags (tags) + tree tags; +{ + current_binding_level->tags = tags; +} + +/* Given NAME, an IDENTIFIER_NODE, + return the structure (or union or enum) definition for that name. + Searches binding levels from BINDING_LEVEL up to the global level. + If THISLEVEL_ONLY is nonzero, searches only the specified context + (but skips any tag-transparent contexts to find one that is + meaningful for tags). + FORM says which kind of type the caller wants; + it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE. + If the wrong kind of type is found, and it's not a template, an error is + reported. */ + +static tree +lookup_tag (form, name, binding_level, thislevel_only) + enum tree_code form; + struct binding_level *binding_level; + tree name; + int thislevel_only; +{ + register struct binding_level *level; + + for (level = binding_level; level; level = level->level_chain) + { + register tree tail; + if (ANON_AGGRNAME_P (name)) + for (tail = level->tags; tail; tail = TREE_CHAIN (tail)) + { + /* There's no need for error checking here, because + anon names are unique throughout the compilation. */ + if (TYPE_IDENTIFIER (TREE_VALUE (tail)) == name) + return TREE_VALUE (tail); + } + else + for (tail = level->tags; tail; tail = TREE_CHAIN (tail)) + { + if (TREE_PURPOSE (tail) == name) + { + enum tree_code code = TREE_CODE (TREE_VALUE (tail)); + /* Should tighten this up; it'll probably permit + UNION_TYPE and a struct template, for example. */ + if (code != form + && !(form != ENUMERAL_TYPE + && (code == TEMPLATE_DECL + || code == UNINSTANTIATED_P_TYPE))) + + { + /* Definition isn't the kind we were looking for. */ + cp_error ("`%#D' redeclared as %C", TREE_VALUE (tail), + form); + } + return TREE_VALUE (tail); + } + } + if (thislevel_only && ! level->tag_transparent) + return NULL_TREE; + if (current_class_type && level->level_chain == global_binding_level) + { + /* Try looking in this class's tags before heading into + global binding level. */ + tree context = current_class_type; + while (context) + { + switch (TREE_CODE_CLASS (TREE_CODE (context))) + { + tree these_tags; + case 't': + these_tags = CLASSTYPE_TAGS (context); + if (ANON_AGGRNAME_P (name)) + while (these_tags) + { + if (TYPE_IDENTIFIER (TREE_VALUE (these_tags)) + == name) + return TREE_VALUE (tail); + these_tags = TREE_CHAIN (these_tags); + } + else + while (these_tags) + { + if (TREE_PURPOSE (these_tags) == name) + { + if (TREE_CODE (TREE_VALUE (these_tags)) != form) + { + cp_error ("`%#D' redeclared as %C in class scope", + TREE_VALUE (tail), form); + } + return TREE_VALUE (tail); + } + these_tags = TREE_CHAIN (these_tags); + } + /* If this type is not yet complete, then don't + look at its context. */ + if (TYPE_SIZE (context) == NULL_TREE) + goto no_context; + /* Go to next enclosing type, if any. */ + context = DECL_CONTEXT (TYPE_NAME (context)); + break; + case 'd': + context = DECL_CONTEXT (context); + break; + default: + my_friendly_abort (10); + } + continue; + no_context: + break; + } + } + } + return NULL_TREE; +} + +void +set_current_level_tags_transparency (tags_transparent) + int tags_transparent; +{ + current_binding_level->tag_transparent = tags_transparent; +} + +/* Given a type, find the tag that was defined for it and return the tag name. + Otherwise return 0. However, the value can never be 0 + in the cases in which this is used. + + C++: If NAME is non-zero, this is the new name to install. This is + done when replacing anonymous tags with real tag names. */ + +static tree +lookup_tag_reverse (type, name) + tree type; + tree name; +{ + register struct binding_level *level; + + for (level = current_binding_level; level; level = level->level_chain) + { + register tree tail; + for (tail = level->tags; tail; tail = TREE_CHAIN (tail)) + { + if (TREE_VALUE (tail) == type) + { + if (name) + TREE_PURPOSE (tail) = name; + return TREE_PURPOSE (tail); + } + } + } + return NULL_TREE; +} + +/* Given type TYPE which was not declared in C++ language context, + attempt to find a name by which it is referred. */ +tree +typedecl_for_tag (tag) + tree tag; +{ + struct binding_level *b = current_binding_level; + + if (TREE_CODE (TYPE_NAME (tag)) == TYPE_DECL) + return TYPE_NAME (tag); + + while (b) + { + tree decls = b->names; + while (decls) + { + if (TREE_CODE (decls) == TYPE_DECL && TREE_TYPE (decls) == tag) + break; + decls = TREE_CHAIN (decls); + } + if (decls) + return decls; + b = b->level_chain; + } + return NULL_TREE; +} + +/* Lookup TYPE in CONTEXT (a chain of nested types or a FUNCTION_DECL). + Return the type value, or NULL_TREE if not found. */ +static tree +lookup_nested_type (type, context) + tree type; + tree context; +{ + if (context == NULL_TREE) + return NULL_TREE; + while (context) + { + switch (TREE_CODE (context)) + { + case TYPE_DECL: + { + tree ctype = TREE_TYPE (context); + tree match = value_member (type, CLASSTYPE_TAGS (ctype)); + if (match) + return TREE_VALUE (match); + context = DECL_CONTEXT (context); + + /* When we have a nested class whose member functions have + local types (e.g., a set of enums), we'll arrive here + with the DECL_CONTEXT as the actual RECORD_TYPE node for + the enclosing class. Instead, we want to make sure we + come back in here with the TYPE_DECL, not the RECORD_TYPE. */ + if (context && TREE_CODE (context) == RECORD_TYPE) + context = TREE_CHAIN (context); + } + break; + case FUNCTION_DECL: + return TYPE_IDENTIFIER (type) ? lookup_name (TYPE_IDENTIFIER (type), 1) : NULL_TREE; + break; + default: + my_friendly_abort (12); + } + } + return NULL_TREE; +} + +/* Look up NAME in the current binding level and its superiors in the + namespace of variables, functions and typedefs. Return a ..._DECL + node of some kind representing its definition if there is only one + such declaration, or return a TREE_LIST with all the overloaded + definitions if there are many, or return 0 if it is undefined. + + If PREFER_TYPE is > 0, we prefer TYPE_DECLs. + If PREFER_TYPE is = 0, we prefer non-TYPE_DECLs. + If PREFER_TYPE is < 0, we arbitrate according to lexical context. */ + +tree +lookup_name (name, prefer_type) + tree name; + int prefer_type; +{ + register tree val; + + if (current_binding_level != global_binding_level + && IDENTIFIER_LOCAL_VALUE (name)) + val = IDENTIFIER_LOCAL_VALUE (name); + /* In C++ class fields are between local and global scope, + just before the global scope. */ + else if (current_class_type) + { + val = IDENTIFIER_CLASS_VALUE (name); + if (val == NULL_TREE + && TYPE_SIZE (current_class_type) == NULL_TREE + && CLASSTYPE_LOCAL_TYPEDECLS (current_class_type)) + { + /* Try to find values from base classes + if we are presently defining a type. + We are presently only interested in TYPE_DECLs. */ + val = lookup_field (current_class_type, name, 0, prefer_type < 0); + if (val == error_mark_node) + return val; + if (val && TREE_CODE (val) != TYPE_DECL) + val = NULL_TREE; + } + + /* yylex() calls this with -2, since we should never start digging for + the nested name at the point where we haven't even, for example, + created the COMPONENT_REF or anything like that. */ + if (val == NULL_TREE) + val = lookup_nested_field (name, prefer_type != -2); + + if (val == NULL_TREE) + val = IDENTIFIER_GLOBAL_VALUE (name); + } + else + val = IDENTIFIER_GLOBAL_VALUE (name); + + if (val) + { + extern int looking_for_typename; + + /* Arbitrate between finding a TYPE_DECL and finding + other kinds of _DECLs. */ + if (TREE_CODE (val) == TYPE_DECL || looking_for_typename < 0) + return val; + + if (IDENTIFIER_HAS_TYPE_VALUE (name)) + { + register tree val_as_type = TYPE_NAME (IDENTIFIER_TYPE_VALUE (name)); + + if (val == val_as_type || prefer_type > 0 + || looking_for_typename > 0) + return val_as_type; + if (prefer_type == 0) + return val; + return arbitrate_lookup (name, val, val_as_type); + } + if (TREE_TYPE (val) == error_mark_node) + return error_mark_node; + } + + return val; +} + +/* Similar to `lookup_name' but look only at current binding level. */ + +tree +lookup_name_current_level (name) + tree name; +{ + register tree t = NULL_TREE; + + if (current_binding_level == global_binding_level) + { + t = IDENTIFIER_GLOBAL_VALUE (name); + + /* extern "C" function() */ + if (t != NULL_TREE && TREE_CODE (t) == TREE_LIST) + t = TREE_VALUE (t); + } + else if (IDENTIFIER_LOCAL_VALUE (name) != NULL_TREE) + { + for (t = current_binding_level->names; t; t = TREE_CHAIN (t)) + if (DECL_NAME (t) == name) + break; + } + + return t; +} + +/* Arrange for the user to get a source line number, even when the + compiler is going down in flames, so that she at least has a + chance of working around problems in the compiler. We used to + call error(), but that let the segmentation fault continue + through; now, it's much more passive by asking them to send the + maintainers mail about the problem. */ + +static void +signal_catch (sig) + int sig; +{ + signal (SIGSEGV, SIG_DFL); +#ifdef SIGIOT + signal (SIGIOT, SIG_DFL); +#endif +#ifdef SIGILL + signal (SIGILL, SIG_DFL); +#endif +#ifdef SIGABRT + signal (SIGABRT, SIG_DFL); +#endif +#ifdef SIGBUS + signal (SIGBUS, SIG_DFL); +#endif + my_friendly_abort (0); +} + +/* Array for holding types considered "built-in". These types + are output in the module in which `main' is defined. */ +static tree *builtin_type_tdescs_arr; +static int builtin_type_tdescs_len, builtin_type_tdescs_max; + +/* Push the declarations of builtin types into the namespace. + RID_INDEX, if < RID_MAX is the index of the builtin type + in the array RID_POINTERS. NAME is the name used when looking + up the builtin type. TYPE is the _TYPE node for the builtin type. */ + +static void +record_builtin_type (rid_index, name, type) + enum rid rid_index; + char *name; + tree type; +{ + tree rname = NULL_TREE, tname = NULL_TREE; + tree tdecl; + + if ((int) rid_index < (int) RID_MAX) + rname = ridpointers[(int) rid_index]; + if (name) + tname = get_identifier (name); + + TYPE_BUILT_IN (type) = 1; + + if (tname) + { +#if 0 /* not yet, should get fixed properly later */ + tdecl = pushdecl (make_type_decl (tname, type)); +#else + tdecl = pushdecl (build_decl (TYPE_DECL, tname, type)); +#endif + set_identifier_type_value (tname, NULL_TREE); + if ((int) rid_index < (int) RID_MAX) + IDENTIFIER_GLOBAL_VALUE (tname) = tdecl; + } + if (rname != NULL_TREE) + { + if (tname != NULL_TREE) + { + set_identifier_type_value (rname, NULL_TREE); + IDENTIFIER_GLOBAL_VALUE (rname) = tdecl; + } + else + { +#if 0 /* not yet, should get fixed properly later */ + tdecl = pushdecl (make_type_decl (rname, type)); +#else + tdecl = pushdecl (build_decl (TYPE_DECL, rname, type)); +#endif + set_identifier_type_value (rname, NULL_TREE); + } + } + + if (flag_dossier) + { + if (builtin_type_tdescs_len+5 >= builtin_type_tdescs_max) + { + builtin_type_tdescs_max *= 2; + builtin_type_tdescs_arr + = (tree *)xrealloc (builtin_type_tdescs_arr, + builtin_type_tdescs_max * sizeof (tree)); + } + builtin_type_tdescs_arr[builtin_type_tdescs_len++] = type; + if (TREE_CODE (type) != POINTER_TYPE) + { + builtin_type_tdescs_arr[builtin_type_tdescs_len++] + = build_pointer_type (type); + builtin_type_tdescs_arr[builtin_type_tdescs_len++] + = build_type_variant (TYPE_POINTER_TO (type), 1, 0); + } + if (TREE_CODE (type) != VOID_TYPE) + { + builtin_type_tdescs_arr[builtin_type_tdescs_len++] + = build_reference_type (type); + builtin_type_tdescs_arr[builtin_type_tdescs_len++] + = build_type_variant (TYPE_REFERENCE_TO (type), 1, 0); + } + } +} + +static void +output_builtin_tdesc_entries () +{ + extern struct obstack permanent_obstack; + + /* If there's more than one main in this file, don't crash. */ + if (builtin_type_tdescs_arr == 0) + return; + + push_obstacks (&permanent_obstack, &permanent_obstack); + while (builtin_type_tdescs_len > 0) + { + tree type = builtin_type_tdescs_arr[--builtin_type_tdescs_len]; + tree tdesc = build_t_desc (type, 0); + TREE_ASM_WRITTEN (tdesc) = 0; + build_t_desc (type, 2); + } + free (builtin_type_tdescs_arr); + builtin_type_tdescs_arr = 0; + pop_obstacks (); +} + +/* Push overloaded decl, in global scope, with one argument so it + can be used as a callback from define_function. */ +static void +push_overloaded_decl_1 (x) + tree x; +{ + push_overloaded_decl (x, 0); +} + +/* Create the predefined scalar types of C, + and some nodes representing standard constants (0, 1, (void *)0). + Initialize the global binding level. + Make definitions for built-in primitive functions. */ + +void +init_decl_processing () +{ + tree decl; + register tree endlink, int_endlink, double_endlink, ptr_endlink; + tree fields[20]; + /* Either char* or void*. */ + tree traditional_ptr_type_node; + /* Data type of memcpy. */ + tree memcpy_ftype; +#if 0 /* Not yet. */ + /* Data type of strncpy. */ + tree strncpy_ftype; +#endif + int wchar_type_size; + tree temp; + tree array_domain_type; + + /* Have to make these distinct before we try using them. */ + lang_name_cplusplus = get_identifier ("C++"); + lang_name_c = get_identifier ("C"); + + /* Initially, C. */ + current_lang_name = lang_name_c; + + current_function_decl = NULL_TREE; + named_labels = NULL_TREE; + named_label_uses = NULL_TREE; + current_binding_level = NULL_BINDING_LEVEL; + free_binding_level = NULL_BINDING_LEVEL; + + /* Because most segmentation signals can be traced back into user + code, catch them and at least give the user a chance of working + around compiler bugs. */ + signal (SIGSEGV, signal_catch); + + /* We will also catch aborts in the back-end through signal_catch and + give the user a chance to see where the error might be, and to defeat + aborts in the back-end when there have been errors previously in their + code. */ +#ifdef SIGIOT + signal (SIGIOT, signal_catch); +#endif +#ifdef SIGILL + signal (SIGILL, signal_catch); +#endif +#ifdef SIGABRT + signal (SIGABRT, signal_catch); +#endif +#ifdef SIGBUS + signal (SIGBUS, signal_catch); +#endif + + gcc_obstack_init (&decl_obstack); + if (flag_dossier) + { + builtin_type_tdescs_max = 100; + builtin_type_tdescs_arr = (tree *)xmalloc (100 * sizeof (tree)); + } + + /* Must lay these out before anything else gets laid out. */ + error_mark_node = make_node (ERROR_MARK); + TREE_PERMANENT (error_mark_node) = 1; + TREE_TYPE (error_mark_node) = error_mark_node; + error_mark_list = build_tree_list (error_mark_node, error_mark_node); + TREE_TYPE (error_mark_list) = error_mark_node; + + pushlevel (0); /* make the binding_level structure for global names. */ + global_binding_level = current_binding_level; + + this_identifier = get_identifier (THIS_NAME); + in_charge_identifier = get_identifier (IN_CHARGE_NAME); + pfn_identifier = get_identifier (VTABLE_PFN_NAME); + index_identifier = get_identifier (VTABLE_INDEX_NAME); + delta_identifier = get_identifier (VTABLE_DELTA_NAME); + delta2_identifier = get_identifier (VTABLE_DELTA2_NAME); + pfn_or_delta2_identifier = get_identifier ("__pfn_or_delta2"); + + /* Define `int' and `char' first so that dbx will output them first. */ + + integer_type_node = make_signed_type (INT_TYPE_SIZE); + record_builtin_type (RID_INT, NULL_PTR, integer_type_node); + + /* Define `char', which is like either `signed char' or `unsigned char' + but not the same as either. */ + + char_type_node = + (flag_signed_char + ? make_signed_type (CHAR_TYPE_SIZE) + : make_unsigned_type (CHAR_TYPE_SIZE)); + record_builtin_type (RID_CHAR, "char", char_type_node); + + long_integer_type_node = make_signed_type (LONG_TYPE_SIZE); + record_builtin_type (RID_LONG, "long int", long_integer_type_node); + + unsigned_type_node = make_unsigned_type (INT_TYPE_SIZE); + record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node); + + long_unsigned_type_node = make_unsigned_type (LONG_TYPE_SIZE); + record_builtin_type (RID_MAX, "long unsigned int", long_unsigned_type_node); + record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node); + + long_long_integer_type_node = make_signed_type (LONG_LONG_TYPE_SIZE); + record_builtin_type (RID_MAX, "long long int", long_long_integer_type_node); + + long_long_unsigned_type_node = make_unsigned_type (LONG_LONG_TYPE_SIZE); + record_builtin_type (RID_MAX, "long long unsigned int", + long_long_unsigned_type_node); + record_builtin_type (RID_MAX, "long long unsigned", + long_long_unsigned_type_node); + + /* `unsigned long' is the standard type for sizeof. + Traditionally, use a signed type. + Note that stddef.h uses `unsigned long', + and this must agree, even of long and int are the same size. */ + sizetype + = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE))); + if (flag_traditional && TREE_UNSIGNED (sizetype)) + sizetype = signed_type (sizetype); + + ptrdiff_type_node + = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE))); + + TREE_TYPE (TYPE_SIZE (integer_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (char_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (unsigned_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (long_unsigned_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (long_integer_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (long_long_integer_type_node)) = sizetype; + TREE_TYPE (TYPE_SIZE (long_long_unsigned_type_node)) = sizetype; + + short_integer_type_node = make_signed_type (SHORT_TYPE_SIZE); + record_builtin_type (RID_SHORT, "short int", short_integer_type_node); + short_unsigned_type_node = make_unsigned_type (SHORT_TYPE_SIZE); + record_builtin_type (RID_MAX, "short unsigned int", short_unsigned_type_node); + record_builtin_type (RID_MAX, "unsigned short", short_unsigned_type_node); + + /* Define both `signed char' and `unsigned char'. */ + signed_char_type_node = make_signed_type (CHAR_TYPE_SIZE); + record_builtin_type (RID_MAX, "signed char", signed_char_type_node); + unsigned_char_type_node = make_unsigned_type (CHAR_TYPE_SIZE); + record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node); + + /* These are types that type_for_size and type_for_mode use. */ + intQI_type_node = make_signed_type (GET_MODE_BITSIZE (QImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node)); + intHI_type_node = make_signed_type (GET_MODE_BITSIZE (HImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node)); + intSI_type_node = make_signed_type (GET_MODE_BITSIZE (SImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node)); + intDI_type_node = make_signed_type (GET_MODE_BITSIZE (DImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node)); + unsigned_intQI_type_node = make_unsigned_type (GET_MODE_BITSIZE (QImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node)); + unsigned_intHI_type_node = make_unsigned_type (GET_MODE_BITSIZE (HImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node)); + unsigned_intSI_type_node = make_unsigned_type (GET_MODE_BITSIZE (SImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node)); + unsigned_intDI_type_node = make_unsigned_type (GET_MODE_BITSIZE (DImode)); + pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node)); + + float_type_node = make_node (REAL_TYPE); + TYPE_PRECISION (float_type_node) = FLOAT_TYPE_SIZE; + record_builtin_type (RID_FLOAT, NULL_PTR, float_type_node); + layout_type (float_type_node); + + double_type_node = make_node (REAL_TYPE); + if (flag_short_double) + TYPE_PRECISION (double_type_node) = FLOAT_TYPE_SIZE; + else + TYPE_PRECISION (double_type_node) = DOUBLE_TYPE_SIZE; + record_builtin_type (RID_DOUBLE, NULL_PTR, double_type_node); + layout_type (double_type_node); + + long_double_type_node = make_node (REAL_TYPE); + TYPE_PRECISION (long_double_type_node) = LONG_DOUBLE_TYPE_SIZE; + record_builtin_type (RID_MAX, "long double", long_double_type_node); + layout_type (long_double_type_node); + + integer_zero_node = build_int_2 (0, 0); + TREE_TYPE (integer_zero_node) = integer_type_node; + integer_one_node = build_int_2 (1, 0); + TREE_TYPE (integer_one_node) = integer_type_node; + integer_two_node = build_int_2 (2, 0); + TREE_TYPE (integer_two_node) = integer_type_node; + integer_three_node = build_int_2 (3, 0); + TREE_TYPE (integer_three_node) = integer_type_node; + empty_init_node = build_nt (CONSTRUCTOR, NULL_TREE, NULL_TREE); + + /* These are needed by stor-layout.c. */ + size_zero_node = size_int (0); + size_one_node = size_int (1); + + void_type_node = make_node (VOID_TYPE); + record_builtin_type (RID_VOID, NULL_PTR, void_type_node); + layout_type (void_type_node); /* Uses integer_zero_node. */ + void_list_node = build_tree_list (NULL_TREE, void_type_node); + TREE_PARMLIST (void_list_node) = 1; + + null_pointer_node = build_int_2 (0, 0); + TREE_TYPE (null_pointer_node) = build_pointer_type (void_type_node); + layout_type (TREE_TYPE (null_pointer_node)); + + /* Used for expressions that do nothing, but are not errors. */ + void_zero_node = build_int_2 (0, 0); + TREE_TYPE (void_zero_node) = void_type_node; + + string_type_node = build_pointer_type (char_type_node); + const_string_type_node = build_pointer_type (build_type_variant (char_type_node, 1, 0)); + record_builtin_type (RID_MAX, NULL_PTR, string_type_node); + + /* Make a type to be the domain of a few array types + whose domains don't really matter. + 200 is small enough that it always fits in size_t + and large enough that it can hold most function names for the + initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */ + array_domain_type = build_index_type (build_int_2 (200, 0)); + + /* make a type for arrays of characters. + With luck nothing will ever really depend on the length of this + array type. */ + char_array_type_node + = build_array_type (char_type_node, array_domain_type); + /* Likewise for arrays of ints. */ + int_array_type_node + = build_array_type (integer_type_node, array_domain_type); + + /* This is just some anonymous class type. Nobody should ever + need to look inside this envelope. */ + class_star_type_node = build_pointer_type (make_lang_type (RECORD_TYPE)); + + default_function_type + = build_function_type (integer_type_node, NULL_TREE); + build_pointer_type (default_function_type); + + ptr_type_node = build_pointer_type (void_type_node); + const_ptr_type_node = build_pointer_type (build_type_variant (void_type_node, 1, 0)); + record_builtin_type (RID_MAX, NULL_PTR, ptr_type_node); + endlink = void_list_node; + int_endlink = tree_cons (NULL_TREE, integer_type_node, endlink); + double_endlink = tree_cons (NULL_TREE, double_type_node, endlink); + ptr_endlink = tree_cons (NULL_TREE, ptr_type_node, endlink); + + double_ftype_double + = build_function_type (double_type_node, double_endlink); + + double_ftype_double_double + = build_function_type (double_type_node, + tree_cons (NULL_TREE, double_type_node, double_endlink)); + + int_ftype_int + = build_function_type (integer_type_node, int_endlink); + + long_ftype_long + = build_function_type (long_integer_type_node, + tree_cons (NULL_TREE, long_integer_type_node, endlink)); + + void_ftype_ptr_ptr_int + = build_function_type (void_type_node, + tree_cons (NULL_TREE, ptr_type_node, + tree_cons (NULL_TREE, ptr_type_node, + int_endlink))); + + int_ftype_cptr_cptr_sizet + = build_function_type (integer_type_node, + tree_cons (NULL_TREE, const_ptr_type_node, + tree_cons (NULL_TREE, const_ptr_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink)))); + + void_ftype_ptr_int_int + = build_function_type (void_type_node, + tree_cons (NULL_TREE, ptr_type_node, + tree_cons (NULL_TREE, integer_type_node, + int_endlink))); + + string_ftype_ptr_ptr /* strcpy prototype */ + = build_function_type (string_type_node, + tree_cons (NULL_TREE, string_type_node, + tree_cons (NULL_TREE, + const_string_type_node, + endlink))); + +#if 0 + /* Not yet. */ + strncpy_ftype /* strncpy prototype */ + = build_function_type (string_type_node, + tree_cons (NULL_TREE, string_type_node, + tree_cons (NULL_TREE, const_string_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink)))); +#endif + + int_ftype_string_string /* strcmp prototype */ + = build_function_type (integer_type_node, + tree_cons (NULL_TREE, const_string_type_node, + tree_cons (NULL_TREE, + const_string_type_node, + endlink))); + + sizet_ftype_string /* strlen prototype */ + = build_function_type (sizetype, + tree_cons (NULL_TREE, const_string_type_node, + endlink)); + + traditional_ptr_type_node + = (flag_traditional ? string_type_node : ptr_type_node); + + memcpy_ftype /* memcpy prototype */ + = build_function_type (traditional_ptr_type_node, + tree_cons (NULL_TREE, ptr_type_node, + tree_cons (NULL_TREE, const_ptr_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink)))); + + if (flag_huge_objects) + delta_type_node = long_integer_type_node; + else + delta_type_node = short_integer_type_node; + + builtin_function ("__builtin_constant_p", int_ftype_int, + BUILT_IN_CONSTANT_P, NULL_PTR); + + builtin_function ("__builtin_alloca", + build_function_type (ptr_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink)), + BUILT_IN_ALLOCA, "alloca"); +#if 0 + builtin_function ("alloca", + build_function_type (ptr_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink)), + BUILT_IN_ALLOCA, NULL_PTR); +#endif + + builtin_function ("__builtin_abs", int_ftype_int, + BUILT_IN_ABS, NULL_PTR); + builtin_function ("__builtin_fabs", double_ftype_double, + BUILT_IN_FABS, NULL_PTR); + builtin_function ("__builtin_labs", long_ftype_long, + BUILT_IN_LABS, NULL_PTR); + builtin_function ("__builtin_ffs", int_ftype_int, + BUILT_IN_FFS, NULL_PTR); + builtin_function ("__builtin_fsqrt", double_ftype_double, + BUILT_IN_FSQRT, NULL_PTR); + builtin_function ("__builtin_sin", double_ftype_double, + BUILT_IN_SIN, "sin"); + builtin_function ("__builtin_cos", double_ftype_double, + BUILT_IN_COS, "cos"); + builtin_function ("__builtin_saveregs", + build_function_type (ptr_type_node, NULL_TREE), + BUILT_IN_SAVEREGS, NULL_PTR); +/* EXPAND_BUILTIN_VARARGS is obsolete. */ +#if 0 + builtin_function ("__builtin_varargs", + build_function_type (ptr_type_node, + tree_cons (NULL_TREE, + integer_type_node, + endlink)), + BUILT_IN_VARARGS, NULL_PTR); +#endif + builtin_function ("__builtin_classify_type", default_function_type, + BUILT_IN_CLASSIFY_TYPE, NULL_PTR); + builtin_function ("__builtin_next_arg", + build_function_type (ptr_type_node, endlink), + BUILT_IN_NEXT_ARG, NULL_PTR); + builtin_function ("__builtin_args_info", + build_function_type (integer_type_node, + tree_cons (NULL_TREE, + integer_type_node, + endlink)), + BUILT_IN_ARGS_INFO, NULL_PTR); + + /* Untyped call and return. */ + builtin_function ("__builtin_apply_args", + build_function_type (ptr_type_node, NULL_TREE), + BUILT_IN_APPLY_ARGS, NULL_PTR); + + temp = tree_cons (NULL_TREE, + build_pointer_type (build_function_type (void_type_node, + NULL_TREE)), + tree_cons (NULL_TREE, + ptr_type_node, + tree_cons (NULL_TREE, + sizetype, + endlink))); + builtin_function ("__builtin_apply", + build_function_type (ptr_type_node, temp), + BUILT_IN_APPLY, NULL_PTR); + builtin_function ("__builtin_return", + build_function_type (void_type_node, + tree_cons (NULL_TREE, + ptr_type_node, + endlink)), + BUILT_IN_RETURN, NULL_PTR); + + /* Currently under experimentation. */ + builtin_function ("__builtin_memcpy", memcpy_ftype, + BUILT_IN_MEMCPY, "memcpy"); + builtin_function ("__builtin_memcmp", int_ftype_cptr_cptr_sizet, + BUILT_IN_MEMCMP, "memcmp"); + builtin_function ("__builtin_strcmp", int_ftype_string_string, + BUILT_IN_STRCMP, "strcmp"); + builtin_function ("__builtin_strcpy", string_ftype_ptr_ptr, + BUILT_IN_STRCPY, "strcpy"); +#if 0 + /* Not yet. */ + builtin_function ("__builtin_strncpy", strncpy_ftype, + BUILT_IN_STRNCPY, "strncpy"); +#endif + builtin_function ("__builtin_strlen", sizet_ftype_string, + BUILT_IN_STRLEN, "strlen"); + + if (!flag_no_builtin) + { +#if 0 /* These do not work well with libg++. */ + builtin_function ("abs", int_ftype_int, BUILT_IN_ABS, NULL_PTR); + builtin_function ("fabs", double_ftype_double, BUILT_IN_FABS, NULL_PTR); + builtin_function ("labs", long_ftype_long, BUILT_IN_LABS, NULL_PTR); +#endif + builtin_function ("memcpy", memcpy_ftype, BUILT_IN_MEMCPY, NULL_PTR); + builtin_function ("memcmp", int_ftype_cptr_cptr_sizet, BUILT_IN_MEMCMP, + NULL_PTR); + builtin_function ("strcmp", int_ftype_string_string, BUILT_IN_STRCMP, NULL_PTR); + builtin_function ("strcpy", string_ftype_ptr_ptr, BUILT_IN_STRCPY, NULL_PTR); +#if 0 + /* Not yet. */ + builtin_function ("strncpy", strncpy_ftype, BUILT_IN_STRNCPY, NULL_PTR); +#endif + builtin_function ("strlen", sizet_ftype_string, BUILT_IN_STRLEN, NULL_PTR); + builtin_function ("sin", double_ftype_double, BUILT_IN_SIN, NULL_PTR); + builtin_function ("cos", double_ftype_double, BUILT_IN_COS, NULL_PTR); + } + +#if 0 + /* Support for these has not been written in either expand_builtin + or build_function_call. */ + builtin_function ("__builtin_div", default_ftype, BUILT_IN_DIV, 0); + builtin_function ("__builtin_ldiv", default_ftype, BUILT_IN_LDIV, 0); + builtin_function ("__builtin_ffloor", double_ftype_double, BUILT_IN_FFLOOR, 0); + builtin_function ("__builtin_fceil", double_ftype_double, BUILT_IN_FCEIL, 0); + builtin_function ("__builtin_fmod", double_ftype_double_double, BUILT_IN_FMOD, 0); + builtin_function ("__builtin_frem", double_ftype_double_double, BUILT_IN_FREM, 0); + builtin_function ("__builtin_memset", ptr_ftype_ptr_int_int, BUILT_IN_MEMSET, 0); + builtin_function ("__builtin_getexp", double_ftype_double, BUILT_IN_GETEXP, 0); + builtin_function ("__builtin_getman", double_ftype_double, BUILT_IN_GETMAN, 0); +#endif + + /* C++ extensions */ + + unknown_type_node = make_node (UNKNOWN_TYPE); +#if 0 /* not yet, should get fixed properly later */ + pushdecl (make_type_decl (get_identifier ("unknown type"), + unknown_type_node)); +#else + decl = pushdecl (build_decl (TYPE_DECL, get_identifier ("unknown type"), + unknown_type_node)); + /* Make sure the "unknown type" typedecl gets ignored for debug info. */ + DECL_IGNORED_P (decl) = 1; +#endif + TYPE_SIZE (unknown_type_node) = TYPE_SIZE (void_type_node); + TYPE_ALIGN (unknown_type_node) = 1; + TYPE_MODE (unknown_type_node) = TYPE_MODE (void_type_node); + /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */ + TREE_TYPE (unknown_type_node) = unknown_type_node; + /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same result. */ + TYPE_POINTER_TO (unknown_type_node) = unknown_type_node; + TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node; + + /* This is for handling opaque types in signatures. */ + opaque_type_node = copy_node (ptr_type_node); + TYPE_MAIN_VARIANT (opaque_type_node) = opaque_type_node; + record_builtin_type (RID_MAX, 0, opaque_type_node); + + /* This is special for C++ so functions can be overloaded. */ + wchar_type_node + = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (WCHAR_TYPE))); + wchar_type_size = TYPE_PRECISION (wchar_type_node); + signed_wchar_type_node = make_signed_type (wchar_type_size); + unsigned_wchar_type_node = make_unsigned_type (wchar_type_size); + wchar_type_node + = TREE_UNSIGNED (wchar_type_node) + ? unsigned_wchar_type_node + : signed_wchar_type_node; + record_builtin_type (RID_WCHAR, "__wchar_t", wchar_type_node); + + /* This is for wide string constants. */ + wchar_array_type_node + = build_array_type (wchar_type_node, array_domain_type); + + /* This is a hack that should go away when we deliver the + real gc code. */ + if (flag_gc) + { + builtin_function ("__gc_main", default_function_type, NOT_BUILT_IN, 0); + pushdecl (lookup_name (get_identifier ("__gc_main"), 0)); + } + + /* Simplify life by making a "vtable_entry_type". Give its + fields names so that the debugger can use them. */ + + vtable_entry_type = make_lang_type (RECORD_TYPE); + fields[0] = build_lang_field_decl (FIELD_DECL, delta_identifier, delta_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, index_identifier, delta_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, pfn_identifier, ptr_type_node); + finish_builtin_type (vtable_entry_type, VTBL_PTR_TYPE, fields, 2, + double_type_node); + + /* Make this part of an invisible union. */ + fields[3] = copy_node (fields[2]); + TREE_TYPE (fields[3]) = delta_type_node; + DECL_NAME (fields[3]) = delta2_identifier; + DECL_MODE (fields[3]) = TYPE_MODE (delta_type_node); + DECL_SIZE (fields[3]) = TYPE_SIZE (delta_type_node); + TREE_UNSIGNED (fields[3]) = 0; + TREE_CHAIN (fields[2]) = fields[3]; + vtable_entry_type = build_type_variant (vtable_entry_type, 1, 0); + record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type); + +#ifdef VTABLE_USES_MASK + /* This is primarily for virtual function definition. We + declare an array of `void *', which can later be + converted to the appropriate function pointer type. + To do pointers to members, we need a mask which can + distinguish an index value into a virtual function table + from an address. */ + vtbl_mask = build_int_2 (~((HOST_WIDE_INT) VINDEX_MAX - 1), -1); +#endif + + vtbl_type_node + = build_array_type (vtable_entry_type, NULL_TREE); + layout_type (vtbl_type_node); + vtbl_type_node = build_type_variant (vtbl_type_node, 1, 0); + record_builtin_type (RID_MAX, NULL_PTR, vtbl_type_node); + + /* Simplify life by making a "sigtable_entry_type". Give its + fields names so that the debugger can use them. */ + + if (flag_handle_signatures) + { + sigtable_entry_type = make_lang_type (RECORD_TYPE); + fields[0] = build_lang_field_decl (FIELD_DECL, get_identifier (SIGTABLE_CODE_NAME), short_integer_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, get_identifier (SIGTABLE_OFFSET_NAME), short_integer_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, get_identifier (SIGTABLE_PFN_NAME), ptr_type_node); + finish_builtin_type (sigtable_entry_type, SIGTABLE_PTR_TYPE, fields, 2, + double_type_node); + sigtable_entry_type = build_type_variant (sigtable_entry_type, 1, 0); + record_builtin_type (RID_MAX, SIGTABLE_PTR_TYPE, sigtable_entry_type); + } + + if (flag_dossier) + { + /* Must build __t_desc type. Currently, type descriptors look like this: + + struct __t_desc + { + const char *name; + int size; + int bits; + struct __t_desc *points_to; + int ivars_count, meths_count; + struct __i_desc *ivars[]; + struct __m_desc *meths[]; + struct __t_desc *parents[]; + struct __t_desc *vbases[]; + int offsets[]; + }; + + ...as per Linton's paper. */ + + __t_desc_type_node = make_lang_type (RECORD_TYPE); + __i_desc_type_node = make_lang_type (RECORD_TYPE); + __m_desc_type_node = make_lang_type (RECORD_TYPE); + __t_desc_array_type = build_array_type (TYPE_POINTER_TO (__t_desc_type_node), NULL_TREE); + __i_desc_array_type = build_array_type (TYPE_POINTER_TO (__i_desc_type_node), NULL_TREE); + __m_desc_array_type = build_array_type (TYPE_POINTER_TO (__m_desc_type_node), NULL_TREE); + + fields[0] = build_lang_field_decl (FIELD_DECL, get_identifier ("name"), + string_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, get_identifier ("size"), + unsigned_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, get_identifier ("bits"), + unsigned_type_node); + fields[3] = build_lang_field_decl (FIELD_DECL, get_identifier ("points_to"), + TYPE_POINTER_TO (__t_desc_type_node)); + fields[4] = build_lang_field_decl (FIELD_DECL, + get_identifier ("ivars_count"), + integer_type_node); + fields[5] = build_lang_field_decl (FIELD_DECL, + get_identifier ("meths_count"), + integer_type_node); + fields[6] = build_lang_field_decl (FIELD_DECL, get_identifier ("ivars"), + build_pointer_type (__i_desc_array_type)); + fields[7] = build_lang_field_decl (FIELD_DECL, get_identifier ("meths"), + build_pointer_type (__m_desc_array_type)); + fields[8] = build_lang_field_decl (FIELD_DECL, get_identifier ("parents"), + build_pointer_type (__t_desc_array_type)); + fields[9] = build_lang_field_decl (FIELD_DECL, get_identifier ("vbases"), + build_pointer_type (__t_desc_array_type)); + fields[10] = build_lang_field_decl (FIELD_DECL, get_identifier ("offsets"), + build_pointer_type (integer_type_node)); + finish_builtin_type (__t_desc_type_node, "__t_desc", fields, 10, integer_type_node); + + /* ivar descriptors look like this: + + struct __i_desc + { + const char *name; + int offset; + struct __t_desc *type; + }; + */ + + fields[0] = build_lang_field_decl (FIELD_DECL, get_identifier ("name"), + string_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, get_identifier ("offset"), + integer_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, get_identifier ("type"), + TYPE_POINTER_TO (__t_desc_type_node)); + finish_builtin_type (__i_desc_type_node, "__i_desc", fields, 2, integer_type_node); + + /* method descriptors look like this: + + struct __m_desc + { + const char *name; + int vindex; + struct __t_desc *vcontext; + struct __t_desc *return_type; + void (*address)(); + short parm_count; + short required_parms; + struct __t_desc *parm_types[]; + }; + */ + + fields[0] = build_lang_field_decl (FIELD_DECL, get_identifier ("name"), + string_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, get_identifier ("vindex"), + integer_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, get_identifier ("vcontext"), + TYPE_POINTER_TO (__t_desc_type_node)); + fields[3] = build_lang_field_decl (FIELD_DECL, get_identifier ("return_type"), + TYPE_POINTER_TO (__t_desc_type_node)); + fields[4] = build_lang_field_decl (FIELD_DECL, get_identifier ("address"), + build_pointer_type (default_function_type)); + fields[5] = build_lang_field_decl (FIELD_DECL, get_identifier ("parm_count"), + short_integer_type_node); + fields[6] = build_lang_field_decl (FIELD_DECL, get_identifier ("required_parms"), + short_integer_type_node); + fields[7] = build_lang_field_decl (FIELD_DECL, get_identifier ("parm_types"), + build_pointer_type (build_array_type (TYPE_POINTER_TO (__t_desc_type_node), NULL_TREE))); + finish_builtin_type (__m_desc_type_node, "__m_desc", fields, 7, integer_type_node); + } + + /* Now, C++. */ + current_lang_name = lang_name_cplusplus; + if (flag_dossier) + { + int i = builtin_type_tdescs_len; + while (i > 0) + { + tree tdesc = build_t_desc (builtin_type_tdescs_arr[--i], 0); + TREE_ASM_WRITTEN (tdesc) = 1; + TREE_PUBLIC (TREE_OPERAND (tdesc, 0)) = 1; + } + } + + auto_function (ansi_opname[(int) NEW_EXPR], + build_function_type (ptr_type_node, + tree_cons (NULL_TREE, sizetype, + void_list_node)), + NOT_BUILT_IN); + auto_function (ansi_opname[(int) DELETE_EXPR], + build_function_type (void_type_node, + tree_cons (NULL_TREE, ptr_type_node, + void_list_node)), + NOT_BUILT_IN); + + abort_fndecl + = define_function ("abort", + build_function_type (void_type_node, void_list_node), + NOT_BUILT_IN, 0, 0); + + unhandled_exception_fndecl + = define_function ("__unhandled_exception", + build_function_type (void_type_node, NULL_TREE), + NOT_BUILT_IN, 0, 0); + + /* Perform other language dependent initializations. */ + init_class_processing (); + init_init_processing (); + init_search_processing (); + + if (flag_handle_exceptions) + { + if (flag_handle_exceptions == 2) + /* Too much trouble to inline all the trys needed for this. */ + flag_this_is_variable = 2; + init_exception_processing (); + } + if (flag_gc) + init_gc_processing (); + if (flag_no_inline) + { + flag_inline_functions = 0; +#if 0 + /* This causes uneccessary emission of inline functions. */ + flag_default_inline = 0; +#endif + } + if (flag_cadillac) + init_cadillac (); + + /* Create the global bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */ + declare_function_name (); + + /* Prepare to check format strings against argument lists. */ + init_function_format_info (); +} + +/* Make a definition for a builtin function named NAME and whose data type + is TYPE. TYPE should be a function type with argument types. + FUNCTION_CODE tells later passes how to compile calls to this function. + See tree.h for its possible values. + + If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME, + the name to be called if we can't opencode the function. */ + +tree +define_function (name, type, function_code, pfn, library_name) + char *name; + tree type; + enum built_in_function function_code; + void (*pfn)(); + char *library_name; +{ + tree decl = build_lang_decl (FUNCTION_DECL, get_identifier (name), type); + DECL_EXTERNAL (decl) = 1; + TREE_PUBLIC (decl) = 1; + + /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME, + we cannot change DECL_ASSEMBLER_NAME until we have installed this + function in the namespace. */ + if (pfn) (*pfn) (decl); + if (library_name) + DECL_ASSEMBLER_NAME (decl) = get_identifier (library_name); + make_function_rtl (decl); + if (function_code != NOT_BUILT_IN) + { + DECL_BUILT_IN (decl) = 1; + DECL_SET_FUNCTION_CODE (decl, function_code); + } + return decl; +} + +/* Called when a declaration is seen that contains no names to declare. + If its type is a reference to a structure, union or enum inherited + from a containing scope, shadow that tag name for the current scope + with a forward reference. + If its type defines a new named structure or union + or defines an enum, it is valid but we need not do anything here. + Otherwise, it is an error. + + C++: may have to grok the declspecs to learn about static, + complain for anonymous unions. */ + +void +shadow_tag (declspecs) + tree declspecs; +{ + int found_tag = 0; + int warned = 0; + int static_or_extern = 0; + register tree link; + register enum tree_code code, ok_code = ERROR_MARK; + register tree t = NULL_TREE; + + for (link = declspecs; link; link = TREE_CHAIN (link)) + { + register tree value = TREE_VALUE (link); + + code = TREE_CODE (value); + if (IS_AGGR_TYPE_CODE (code) || code == ENUMERAL_TYPE) + /* Used to test also that TYPE_SIZE (value) != 0. + That caused warning for `struct foo;' at top level in the file. */ + { + register tree name = TYPE_NAME (value); + + if (name == NULL_TREE) + name = lookup_tag_reverse (value, NULL_TREE); + + if (name && TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + + t = lookup_tag (code, name, inner_binding_level, 1); + + if (t == NULL_TREE) + { + push_obstacks (&permanent_obstack, &permanent_obstack); + if (IS_AGGR_TYPE_CODE (code)) + t = make_lang_type (code); + else + t = make_node (code); + pushtag (name, t, 0); + pop_obstacks (); + ok_code = code; + break; + } + else if (name != NULL_TREE || code == ENUMERAL_TYPE) + ok_code = code; + + if (ok_code != ERROR_MARK) + found_tag++; + else + { + if (!warned) + pedwarn ("useless keyword or type name in declaration"); + warned = 1; + } + } + else if (value == ridpointers[(int) RID_STATIC] + || value == ridpointers[(int) RID_EXTERN]) + static_or_extern = 1; + } + + /* This is where the variables in an anonymous union are + declared. An anonymous union declaration looks like: + union { ... } ; + because there is no declarator after the union, the parser + sends that declaration here. */ + if (ok_code == UNION_TYPE + && t != NULL_TREE + && ((TREE_CODE (TYPE_NAME (t)) == IDENTIFIER_NODE + && ANON_AGGRNAME_P (TYPE_NAME (t))) + || (TREE_CODE (TYPE_NAME (t)) == TYPE_DECL + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))))) + { + /* ANSI C++ June 5 1992 WP 9.5.3. Anonymous unions may not have + function members. */ + if (TYPE_FIELDS (t)) + { + tree decl = grokdeclarator (NULL_TREE, declspecs, NORMAL, 0, NULL_TREE); + finish_anon_union (decl); + } + else + error ("anonymous union cannot have a function member"); + } + else + { + /* Anonymous unions are objects, that's why we only check for + static/extern specifiers in this branch. */ + if (static_or_extern) + error ("static/extern can only be specified for objects and functions"); + + if (ok_code == RECORD_TYPE + && found_tag == 1 + && TYPE_LANG_SPECIFIC (t) + && CLASSTYPE_DECLARED_EXCEPTION (t)) + { + if (TYPE_SIZE (t)) + cp_error ("redeclaration of exception `%T'", t); + else + { + tree ename, decl; + + push_obstacks (&permanent_obstack, &permanent_obstack); + + pushclass (t, 0); + finish_exception (t, NULL_TREE); + + ename = TYPE_NAME (t); + if (TREE_CODE (ename) == TYPE_DECL) + ename = DECL_NAME (ename); + decl = build_lang_field_decl (VAR_DECL, ename, t); + finish_exception_decl (current_class_name, decl); + end_exception_decls (); + + pop_obstacks (); + } + } + else if (!warned && found_tag > 1) + warning ("multiple types in one declaration"); + } +} + +/* Decode a "typename", such as "int **", returning a ..._TYPE node. */ + +tree +groktypename (typename) + tree typename; +{ + if (TREE_CODE (typename) != TREE_LIST) + return typename; + return grokdeclarator (TREE_VALUE (typename), + TREE_PURPOSE (typename), + TYPENAME, 0, NULL_TREE); +} + +/* Decode a declarator in an ordinary declaration or data definition. + This is called as soon as the type information and variable name + have been parsed, before parsing the initializer if any. + Here we create the ..._DECL node, fill in its type, + and put it on the list of decls for the current context. + The ..._DECL node is returned as the value. + + Exception: for arrays where the length is not specified, + the type is left null, to be filled in by `finish_decl'. + + Function definitions do not come here; they go to start_function + instead. However, external and forward declarations of functions + do go through here. Structure field declarations are done by + grokfield and not through here. */ + +/* Set this to zero to debug not using the temporary obstack + to parse initializers. */ +int debug_temp_inits = 1; + +tree +start_decl (declarator, declspecs, initialized, raises) + tree declarator, declspecs; + int initialized; + tree raises; +{ + register tree decl; + register tree type, tem; + tree context; + extern int have_extern_spec; + extern int used_extern_spec; + + int init_written = initialized; + + /* This should only be done once on the top most decl. */ + if (have_extern_spec && !used_extern_spec) + { + declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"), declspecs); + used_extern_spec = 1; + } + + decl = grokdeclarator (declarator, declspecs, NORMAL, initialized, raises); + if (decl == NULL_TREE || decl == void_type_node) + return NULL_TREE; + + type = TREE_TYPE (decl); + + /* Don't lose if destructors must be executed at file-level. */ + if (TREE_STATIC (decl) + && TYPE_NEEDS_DESTRUCTOR (type) + && !TREE_PERMANENT (decl)) + { + push_obstacks (&permanent_obstack, &permanent_obstack); + decl = copy_node (decl); + if (TREE_CODE (type) == ARRAY_TYPE) + { + tree itype = TYPE_DOMAIN (type); + if (itype && ! TREE_PERMANENT (itype)) + { + itype = build_index_type (copy_to_permanent (TYPE_MAX_VALUE (itype))); + type = build_cplus_array_type (TREE_TYPE (type), itype); + TREE_TYPE (decl) = type; + } + } + pop_obstacks (); + } + + /* Interesting work for this is done in `finish_exception_decl'. */ + if (TREE_CODE (type) == RECORD_TYPE + && CLASSTYPE_DECLARED_EXCEPTION (type)) + return decl; + + /* Corresponding pop_obstacks is done in `finish_decl'. */ + push_obstacks_nochange (); + + context + = (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl)) + ? DECL_CLASS_CONTEXT (decl) + : DECL_CONTEXT (decl); + + if (processing_template_decl) + { + tree d; + if (TREE_CODE (decl) == FUNCTION_DECL) + { + /* Declarator is a call_expr; extract arguments from it, since + grokdeclarator didn't do it. */ + tree args; + args = copy_to_permanent (last_function_parms); + if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE) + { + tree t = TREE_TYPE (decl); + + t = TYPE_METHOD_BASETYPE (t); /* type method belongs to */ + if (TREE_CODE (t) != UNINSTANTIATED_P_TYPE) + { + t = build_pointer_type (t); /* base type of `this' */ +#if 1 + /* I suspect this is wrong. */ + t = build_type_variant (t, flag_this_is_variable <= 0, + 0); /* type of `this' */ +#else + t = build_type_variant (t, 0, 0); /* type of `this' */ +#endif + t = build (PARM_DECL, t, this_identifier); + TREE_CHAIN (t) = args; + args = t; + } + } + DECL_ARGUMENTS (decl) = args; + } + d = build_lang_decl (TEMPLATE_DECL, DECL_NAME (decl), TREE_TYPE (decl)); + if (interface_unknown && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (decl)) + warn_if_unknown_interface (); + TREE_PUBLIC (d) = TREE_PUBLIC (decl) = flag_external_templates && !interface_unknown; + TREE_STATIC (d) = TREE_STATIC (decl); + DECL_EXTERNAL (d) = (DECL_EXTERNAL (decl) + && !(context && !DECL_THIS_EXTERN (decl))); + DECL_TEMPLATE_RESULT (d) = decl; + DECL_OVERLOADED (d) = 1; + decl = d; + } + + if (context && TYPE_SIZE (context) != NULL_TREE) + { + /* If it was not explicitly declared `extern', + revoke any previous claims of DECL_EXTERNAL. */ + if (DECL_THIS_EXTERN (decl) == 0) + DECL_EXTERNAL (decl) = 0; + if (DECL_LANG_SPECIFIC (decl)) + DECL_IN_AGGR_P (decl) = 0; + pushclass (context, 2); + } + + /* If this type of object needs a cleanup, and control may + jump past it, make a new binding level so that it is cleaned + up only when it is initialized first. */ + if (TYPE_NEEDS_DESTRUCTOR (type) + && current_binding_level->more_cleanups_ok == 0) + pushlevel_temporary (1); + + if (initialized) + /* Is it valid for this decl to have an initializer at all? + If not, set INITIALIZED to zero, which will indirectly + tell `finish_decl' to ignore the initializer once it is parsed. */ + switch (TREE_CODE (decl)) + { + case TYPE_DECL: + /* typedef foo = bar means give foo the same type as bar. + We haven't parsed bar yet, so `finish_decl' will fix that up. + Any other case of an initialization in a TYPE_DECL is an error. */ + if (pedantic || list_length (declspecs) > 1) + { + cp_error ("typedef `%D' is initialized", decl); + initialized = 0; + } + break; + + case FUNCTION_DECL: + cp_error ("function `%#D' is initialized like a variable", decl); + initialized = 0; + break; + + default: + /* Don't allow initializations for incomplete types except for + arrays which might be completed by the initialization. */ + if (TYPE_SIZE (type) != NULL_TREE) + ; /* A complete type is ok. */ + else if (TREE_CODE (type) != ARRAY_TYPE) + { + cp_error ("variable `%#D' has initializer but incomplete type", + decl); + initialized = 0; + } + else if (TYPE_SIZE (TREE_TYPE (type)) == NULL_TREE) + { + cp_error ("elements of array `%#D' have incomplete type", decl); + initialized = 0; + } + } + + if (!initialized + && TREE_CODE (decl) != TYPE_DECL + && TREE_CODE (decl) != TEMPLATE_DECL + && IS_AGGR_TYPE (type) && ! DECL_EXTERNAL (decl)) + { + if (TYPE_SIZE (type) == NULL_TREE) + { + cp_error ("aggregate `%#D' has incomplete type and cannot be initialized", + decl); + /* Change the type so that assemble_variable will give + DECL an rtl we can live with: (mem (const_int 0)). */ + TREE_TYPE (decl) = error_mark_node; + type = error_mark_node; + } + else + { + /* If any base type in the hierarchy of TYPE needs a constructor, + then we set initialized to 1. This way any nodes which are + created for the purposes of initializing this aggregate + will live as long as it does. This is necessary for global + aggregates which do not have their initializers processed until + the end of the file. */ + initialized = TYPE_NEEDS_CONSTRUCTING (type); + } + } + + if (initialized) + { + if (current_binding_level != global_binding_level + && DECL_EXTERNAL (decl)) + cp_warning ("declaration of `%#D' has `extern' and is initialized", + decl); + DECL_EXTERNAL (decl) = 0; + if (current_binding_level == global_binding_level) + TREE_STATIC (decl) = 1; + + /* Tell `pushdecl' this is an initialized decl + even though we don't yet have the initializer expression. + Also tell `finish_decl' it may store the real initializer. */ + DECL_INITIAL (decl) = error_mark_node; + } + + /* Add this decl to the current binding level, but not if it + comes from another scope, e.g. a static member variable. + TEM may equal DECL or it may be a previous decl of the same name. */ + if ((TREE_CODE (decl) != PARM_DECL && DECL_CONTEXT (decl) != NULL_TREE) + || (TREE_CODE (decl) == TEMPLATE_DECL && !global_bindings_p ()) + || TREE_CODE (type) == LANG_TYPE) + tem = decl; + else + { + tem = pushdecl (decl); + if (is_overloaded_fn (tem)) + { + tree tem2; + tem = get_first_fn (tem); + tem2 = decl_value_member (decl, tem); + + if (tem2 != NULL_TREE) + tem = tem2; + else + { + while (tem && ! decls_match (decl, tem)) + tem = DECL_CHAIN (tem); + if (tem == NULL_TREE) + tem = decl; + } + } + } + + /* Tell the back-end to use or not use .common as appropriate. */ + DECL_COMMON (tem) = flag_conserve_space; + +#if 0 + /* We don't do this yet for GNU C++. */ + /* For a local variable, define the RTL now. */ + if (current_binding_level != global_binding_level + /* But not if this is a duplicate decl + and we preserved the rtl from the previous one + (which may or may not happen). */ + && DECL_RTL (tem) == NULL_RTX) + { + if (TYPE_SIZE (TREE_TYPE (tem)) != NULL_TREE) + expand_decl (tem); + else if (TREE_CODE (TREE_TYPE (tem)) == ARRAY_TYPE + && DECL_INITIAL (tem) != NULL_TREE) + expand_decl (tem); + } +#endif + + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_OVERLOADED (decl)) + /* @@ Also done in start_function. */ + tem = push_overloaded_decl (tem, 1); + else if (TREE_CODE (decl) == TEMPLATE_DECL) + { + tree result = DECL_TEMPLATE_RESULT (decl); + if (DECL_CONTEXT (result) != NULL_TREE) + { + tree type; + type = DECL_CONTEXT (result); + + if (TREE_CODE (type) != UNINSTANTIATED_P_TYPE) + { + cp_error ("declaration of `%D' in non-template type `%T'", + decl, type); + return NULL_TREE; + } + + if (/* TREE_CODE (result) == VAR_DECL */ 1) + { +#if 0 + tree tmpl = UPT_TEMPLATE (type); + + fprintf (stderr, "%s:%d: adding ", __FILE__, __LINE__); + print_node_brief (stderr, "", DECL_NAME (tem), 0); + fprintf (stderr, " to class %s\n", + IDENTIFIER_POINTER (DECL_NAME (tmpl))); + DECL_TEMPLATE_MEMBERS (tmpl) + = perm_tree_cons (DECL_NAME (tem), tem, + DECL_TEMPLATE_MEMBERS (tmpl)); +#endif + return tem; + } + my_friendly_abort (13); + } + else if (TREE_CODE (result) == FUNCTION_DECL) + tem = push_overloaded_decl (tem, 0); + else if (TREE_CODE (result) == VAR_DECL + || TREE_CODE (result) == TYPE_DECL) + { + cp_error ("invalid template `%#D'", result); + return NULL_TREE; + } + else + my_friendly_abort (14); + } + + if (init_written + && ! (TREE_CODE (tem) == PARM_DECL + || (TREE_READONLY (tem) + && (TREE_CODE (tem) == VAR_DECL + || TREE_CODE (tem) == FIELD_DECL)))) + { + /* When parsing and digesting the initializer, + use temporary storage. Do this even if we will ignore the value. */ + if (current_binding_level == global_binding_level && debug_temp_inits) + { + if (TYPE_NEEDS_CONSTRUCTING (type) || TREE_CODE (type) == REFERENCE_TYPE) + /* In this case, the initializer must lay down in permanent + storage, since it will be saved until `finish_file' is run. */ + ; + else + temporary_allocation (); + } + } + + if (flag_cadillac) + cadillac_start_decl (tem); + + return tem; +} + +static void +make_temporary_for_reference (decl, ctor_call, init, cleanupp) + tree decl, ctor_call, init; + tree *cleanupp; +{ + tree type = TREE_TYPE (decl); + tree target_type = TREE_TYPE (type); + tree tmp, tmp_addr; + + if (ctor_call) + { + tmp_addr = TREE_VALUE (TREE_OPERAND (ctor_call, 1)); + if (TREE_CODE (tmp_addr) == NOP_EXPR) + tmp_addr = TREE_OPERAND (tmp_addr, 0); + my_friendly_assert (TREE_CODE (tmp_addr) == ADDR_EXPR, 146); + tmp = TREE_OPERAND (tmp_addr, 0); + } + else + { + tmp = get_temp_name (target_type, + current_binding_level == global_binding_level); + tmp_addr = build_unary_op (ADDR_EXPR, tmp, 0); + } + + TREE_TYPE (tmp_addr) = build_pointer_type (target_type); + DECL_INITIAL (decl) = convert (TYPE_POINTER_TO (target_type), tmp_addr); + TREE_TYPE (DECL_INITIAL (decl)) = type; + if (TYPE_NEEDS_CONSTRUCTING (target_type)) + { + if (current_binding_level == global_binding_level) + { + /* lay this variable out now. Otherwise `output_addressed_constants' + gets confused by its initializer. */ + make_decl_rtl (tmp, NULL_PTR, 1); + static_aggregates = perm_tree_cons (init, tmp, static_aggregates); + } + else + { + if (ctor_call != NULL_TREE) + init = ctor_call; + else + init = build_method_call (tmp, constructor_name_full (target_type), + build_tree_list (NULL_TREE, init), + NULL_TREE, LOOKUP_NORMAL); + DECL_INITIAL (decl) = build (COMPOUND_EXPR, type, init, + DECL_INITIAL (decl)); + *cleanupp = maybe_build_cleanup (tmp); + } + } + else + { + DECL_INITIAL (tmp) = init; + TREE_STATIC (tmp) = current_binding_level == global_binding_level; + finish_decl (tmp, init, 0, 0); + } + if (TREE_STATIC (tmp)) + preserve_initializer (); +} + +/* Handle initialization of references. + These three arguments from from `finish_decl', and have the + same meaning here that they do there. */ +/* quotes on semantics can be found in ARM 8.4.3. */ +static void +grok_reference_init (decl, type, init, cleanupp) + tree decl, type, init; + tree *cleanupp; +{ + char *errstr = NULL; + int is_reference; + tree tmp; + tree this_ptr_type, actual_init = NULL_TREE; + + if (init == NULL_TREE) + { + if (DECL_LANG_SPECIFIC (decl) == 0 + || DECL_IN_AGGR_P (decl) == 0) + { + cp_error ("`%D' declared as reference but not initialized", decl); + if (TREE_CODE (decl) == VAR_DECL) + SET_DECL_REFERENCE_SLOT (decl, error_mark_node); + } + return; + } + + if (init == error_mark_node) + return; + + if (TREE_CODE (type) == REFERENCE_TYPE + && TREE_CODE (init) == CONSTRUCTOR) + { + cp_error ("ANSI C++ forbids use of initializer list to initialize reference `%D'", decl); + return; + } + + if (TREE_CODE (init) == TREE_LIST) + init = build_compound_expr (init); + is_reference = TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE; + tmp = is_reference ? convert_from_reference (init) : init; + + if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE + && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE) + { + /* Note: default conversion is only called in very + special cases. */ + init = default_conversion (init); + } + + /* Can we just enreference this lvalue? */ + if ((is_reference || lvalue_p (init) + || (actual_init = unary_complex_lvalue (ADDR_EXPR, init))) + && comptypes (TYPE_MAIN_VARIANT (TREE_TYPE (type)), + TYPE_MAIN_VARIANT (TREE_TYPE (tmp)), 0)) + { + /* This section implements ANSI C++ June 5 1992 WP 8.4.3.5. */ + + /* A reference to a volatile T cannot be initialized with + a const T, and vice-versa. */ + if (TYPE_VOLATILE (TREE_TYPE (type)) && TREE_READONLY (init)) + errstr = "cannot initialize a reference to a volatile `%T' with a const `%T'"; + else if (TYPE_READONLY (TREE_TYPE (type)) && TREE_THIS_VOLATILE (init)) + errstr = "cannot initialize a reference to a const `%T' with a volatile `%T'"; + /* A reference to a plain T can be initialized only with a plain T. */ + else if (!TYPE_VOLATILE (TREE_TYPE (type)) + && !TYPE_READONLY (TREE_TYPE (type))) + { + if (TREE_READONLY (init)) + errstr = "cannot initialize a reference to `%T' with a const `%T'"; + else if (TREE_THIS_VOLATILE (init)) + errstr = "cannot initialize a reference to `%T' with a volatile `%T'"; + } + if (errstr) + { + cp_error (errstr, TREE_TYPE (type), TREE_TYPE (tmp)); + goto fail; + } + } + /* OK, can we generate a reference then? */ + else if ((actual_init = convert_to_reference + (decl, type, init, 0, 0, "initialization", 0, + LOOKUP_SPECULATIVELY|LOOKUP_NORMAL))) + { + if (actual_init == error_mark_node) + goto fail; + + init = actual_init; + is_reference = 1; + } + /* OK, try going through a temporary. */ + else if ((actual_init = convert_to_reference + (error_mark_node, type, init, 0, 0, "initialization", + 0, LOOKUP_NORMAL))) + { + if (actual_init == error_mark_node) + goto fail; + + init = actual_init; + is_reference = 1; + + if (TREE_CODE (init) == WITH_CLEANUP_EXPR) + { + /* Associate the cleanup with the reference so that we + don't get burned by "aggressive" cleanup policy. */ + *cleanupp = TREE_OPERAND (init, 2); + TREE_OPERAND (init, 2) = error_mark_node; + } + } + else + { + cp_error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init)); + goto fail; + } + + /* In the case of initialization, it is permissible + to assign one reference to another. */ + this_ptr_type = build_pointer_type (TREE_TYPE (type)); + + if (is_reference) + { + if (TREE_SIDE_EFFECTS (init)) + DECL_INITIAL (decl) = save_expr (init); + else + DECL_INITIAL (decl) = init; + } + else if (lvalue_p (init)) + { + tmp = build_unary_op (ADDR_EXPR, init, 0); + if (TREE_CODE (tmp) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (tmp, 0)) == WITH_CLEANUP_EXPR) + { + if (*cleanupp) my_friendly_abort (1); + *cleanupp = TREE_OPERAND (TREE_OPERAND (tmp, 0), 2); + TREE_OPERAND (TREE_OPERAND (tmp, 0), 2) = error_mark_node; + } + if (IS_AGGR_TYPE (TREE_TYPE (this_ptr_type))) + DECL_INITIAL (decl) = convert_pointer_to (TREE_TYPE (this_ptr_type), tmp); + else + DECL_INITIAL (decl) = convert (this_ptr_type, tmp); + + DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl)); + if (DECL_INITIAL (decl) == current_class_decl) + DECL_INITIAL (decl) = copy_node (current_class_decl); + TREE_TYPE (DECL_INITIAL (decl)) = type; + } + /* If actual_init is set here, it is set from the first check above. */ + else if (actual_init) + { + /* The initializer for this decl goes into its + DECL_REFERENCE_SLOT. Make sure that we can handle + multiple evaluations without ill effect. */ + if (TREE_CODE (actual_init) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (actual_init, 0)) == TARGET_EXPR) + actual_init = save_expr (actual_init); + DECL_INITIAL (decl) = convert_pointer_to (TREE_TYPE (this_ptr_type), actual_init); + DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl)); + TREE_TYPE (DECL_INITIAL (decl)) = type; + } + else + my_friendly_abort (1); + + done: + /* ?? Can this be optimized in some cases to + hand back the DECL_INITIAL slot?? */ + if (TYPE_SIZE (TREE_TYPE (type))) + { + init = convert_from_reference (decl); + if (TREE_PERMANENT (decl)) + init = copy_to_permanent (init); + SET_DECL_REFERENCE_SLOT (decl, init); + } + + if (TREE_STATIC (decl) && ! TREE_CONSTANT (DECL_INITIAL (decl))) + { + expand_static_init (decl, DECL_INITIAL (decl)); + DECL_INITIAL (decl) = NULL_TREE; + } + return; + + fail: + if (TREE_CODE (decl) == VAR_DECL) + SET_DECL_REFERENCE_SLOT (decl, error_mark_node); + return; +} + +/* Finish processing of a declaration; + install its line number and initial value. + If the length of an array type is not known before, + it must be determined now, from the initial value, or it is an error. + + Call `pop_obstacks' iff NEED_POP is nonzero. + + For C++, `finish_decl' must be fairly evasive: it must keep initializers + for aggregates that have constructors alive on the permanent obstack, + so that the global initializing functions can be written at the end. + + INIT0 holds the value of an initializer that should be allowed to escape + the normal rules. + + For functions that take default parameters, DECL points to its + "maximal" instantiation. `finish_decl' must then also declared its + subsequently lower and lower forms of instantiation, checking for + ambiguity as it goes. This can be sped up later. */ + +void +finish_decl (decl, init, asmspec_tree, need_pop) + tree decl, init; + tree asmspec_tree; + int need_pop; +{ + register tree type; + tree cleanup = NULL_TREE, ttype; + int was_incomplete; + int temporary = allocation_temporary_p (); + char *asmspec = NULL; + int was_readonly = 0; + + /* If this is 0, then we did not change obstacks. */ + if (! decl) + { + if (init) + error ("assignment (not initialization) in declaration"); + return; + } + + if (asmspec_tree) + { + asmspec = TREE_STRING_POINTER (asmspec_tree); + /* Zero out old RTL, since we will rewrite it. */ + DECL_RTL (decl) = NULL_RTX; + } + + /* If the type of the thing we are declaring either has + a constructor, or has a virtual function table pointer, + AND its initialization was accepted by `start_decl', + then we stayed on the permanent obstack through the + declaration, otherwise, changed obstacks as GCC would. */ + + type = TREE_TYPE (decl); + + was_incomplete = (DECL_SIZE (decl) == NULL_TREE); + + /* Take care of TYPE_DECLs up front. */ + if (TREE_CODE (decl) == TYPE_DECL) + { + if (init && DECL_INITIAL (decl)) + { + /* typedef foo = bar; store the type of bar as the type of foo. */ + TREE_TYPE (decl) = type = TREE_TYPE (init); + DECL_INITIAL (decl) = init = NULL_TREE; + } + if (IS_AGGR_TYPE (type) && DECL_NAME (decl)) + { + if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type) + cp_warning ("shadowing previous type declaration of `%#D'", decl); + set_identifier_type_value (DECL_NAME (decl), type); + CLASSTYPE_GOT_SEMICOLON (type) = 1; + } + GNU_xref_decl (current_function_decl, decl); + rest_of_decl_compilation (decl, NULL_PTR, + DECL_CONTEXT (decl) == NULL_TREE, 0); + goto finish_end; + } + if (type != error_mark_node && IS_AGGR_TYPE (type) + && CLASSTYPE_DECLARED_EXCEPTION (type)) + { + finish_exception_decl (NULL_TREE, decl); + CLASSTYPE_GOT_SEMICOLON (type) = 1; + goto finish_end; + } + if (TREE_CODE (decl) != FUNCTION_DECL) + { + ttype = target_type (type); +#if 0 /* WTF? -KR + Leave this out until we can figure out why it was + needed/desirable in the first place. Then put a comment + here explaining why. Or just delete the code if no ill + effects arise. */ + if (TYPE_NAME (ttype) + && TREE_CODE (TYPE_NAME (ttype)) == TYPE_DECL + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (ttype))) + { + tree old_id = TYPE_IDENTIFIER (ttype); + char *newname = (char *)alloca (IDENTIFIER_LENGTH (old_id) + 2); + /* Need to preserve template data for UPT nodes. */ + tree old_template = IDENTIFIER_TEMPLATE (old_id); + newname[0] = '_'; + bcopy (IDENTIFIER_POINTER (old_id), newname + 1, + IDENTIFIER_LENGTH (old_id) + 1); + old_id = get_identifier (newname); + lookup_tag_reverse (ttype, old_id); + TYPE_IDENTIFIER (ttype) = old_id; + IDENTIFIER_TEMPLATE (old_id) = old_template; + } +#endif + } + + if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl) + && TYPE_NEEDS_CONSTRUCTING (type)) + { + + /* Currently, GNU C++ puts constants in text space, making them + impossible to initialize. In the future, one would hope for + an operating system which understood the difference between + initialization and the running of a program. */ + was_readonly = 1; + TREE_READONLY (decl) = 0; + } + + if (TREE_CODE (decl) == FIELD_DECL) + { + if (init && init != error_mark_node) + my_friendly_assert (TREE_PERMANENT (init), 147); + + if (asmspec) + { + /* This must override the asm specifier which was placed + by grokclassfn. Lay this out fresh. + + @@ Should emit an error if this redefines an asm-specified + @@ name, or if we have already used the function's name. */ + DECL_RTL (TREE_TYPE (decl)) = NULL_RTX; + DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec); + make_decl_rtl (decl, asmspec, 0); + } + } + /* If `start_decl' didn't like having an initialization, ignore it now. */ + else if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE) + init = NULL_TREE; + else if (DECL_EXTERNAL (decl)) + ; + else if (TREE_CODE (type) == REFERENCE_TYPE + || (TYPE_LANG_SPECIFIC (type) && IS_SIGNATURE_REFERENCE (type))) + { + grok_reference_init (decl, type, init, &cleanup); + init = NULL_TREE; + } + + GNU_xref_decl (current_function_decl, decl); + + if (TREE_CODE (decl) == FIELD_DECL || DECL_EXTERNAL (decl)) + ; + else if (TREE_CODE (decl) == CONST_DECL) + { + my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148); + + DECL_INITIAL (decl) = init; + + /* This will keep us from needing to worry about our obstacks. */ + my_friendly_assert (init != NULL_TREE, 149); + init = NULL_TREE; + } + else if (init) + { + if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type)) + { + if (TREE_CODE (type) == ARRAY_TYPE) + init = digest_init (type, init, (tree *) 0); + else if (TREE_CODE (init) == CONSTRUCTOR + && CONSTRUCTOR_ELTS (init) != NULL_TREE) + { + if (TYPE_NEEDS_CONSTRUCTING (type)) + { + cp_error ("`%D' must be initialized by constructor, not by `{...}'", decl); + init = error_mark_node; + } + else + goto dont_use_constructor; + } +#if 0 + /* fix this in `build_functional_cast' instead. + Here's the trigger code: + + struct ostream + { + ostream (); + ostream (int, char *); + ostream (char *); + operator char *(); + ostream (void *); + operator void *(); + operator << (int); + }; + int buf_size = 1024; + static char buf[buf_size]; + const char *debug(int i) { + char *b = &buf[0]; + ostream o = ostream(buf_size, b); + o << i; + return buf; + } + */ + + else if (TREE_CODE (init) == TARGET_EXPR + && TREE_CODE (TREE_OPERAND (init, 1) == NEW_EXPR)) + { + /* User wrote something like `foo x = foo (args)' */ + my_friendly_assert (TREE_CODE (TREE_OPERAND (init, 0)) == VAR_DECL, 150); + my_friendly_assert (DECL_NAME (TREE_OPERAND (init, 0)) == NULL_TREE, 151); + + /* User wrote exactly `foo x = foo (args)' */ + if (TYPE_MAIN_VARIANT (type) == TREE_TYPE (init)) + { + init = build (CALL_EXPR, TREE_TYPE (init), + TREE_OPERAND (TREE_OPERAND (init, 1), 0), + TREE_OPERAND (TREE_OPERAND (init, 1), 1), 0); + TREE_SIDE_EFFECTS (init) = 1; + } + } +#endif + + /* We must hide the initializer so that expand_decl + won't try to do something it does not understand. */ + if (current_binding_level == global_binding_level) + { + tree value; + if (flag_conserve_space) + /* If we say -fconserve-space, we want this to save + space, at the expense of wrong semantics. */ + /* Should this be a NULL_TREE? */ + value = error_mark_node; + else + /* If we say -fno-conserve-space, we want this to + produce errors about redefs, to do this we make it + go in the data space */ + value = digest_init (type, empty_init_node, (tree *) 0); + DECL_INITIAL (decl) = value; + } + else + DECL_INITIAL (decl) = error_mark_node; + } + else + { + dont_use_constructor: + if (TREE_CODE (init) != TREE_VEC) + init = store_init_value (decl, init); + + if (init) + /* Don't let anyone try to initialize this variable + until we are ready to do so. */ + DECL_INITIAL (decl) = error_mark_node; + } + } + else if (TREE_CODE_CLASS (TREE_CODE (type)) == 't' + && (IS_AGGR_TYPE (type) || TYPE_NEEDS_CONSTRUCTING (type))) + { + tree ctype = type; + while (TREE_CODE (ctype) == ARRAY_TYPE) + ctype = TREE_TYPE (ctype); + if (! TYPE_NEEDS_CONSTRUCTING (ctype)) + { + if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (ctype)) + cp_error ("structure `%D' with uninitialized const members", decl); + if (CLASSTYPE_REF_FIELDS_NEED_INIT (ctype)) + cp_error ("structure `%D' with uninitialized reference members", decl); + } + + if (TREE_CODE (decl) == VAR_DECL + && !DECL_INITIAL (decl) + && !TYPE_NEEDS_CONSTRUCTING (type) + && (TYPE_READONLY (type) || TREE_READONLY (decl))) + cp_error ("uninitialized const `%D'", decl); + + /* Initialize variables in need of static initialization + with `empty_init_node' to keep assemble_variable from putting them + in the wrong program space. (Common storage is okay for non-public + uninitialized data; the linker can't match it with storage from other + files, and we may save some disk space.) */ + if (flag_pic == 0 + && TREE_STATIC (decl) + && TREE_PUBLIC (decl) + && ! DECL_EXTERNAL (decl) + && TREE_CODE (decl) == VAR_DECL + && TYPE_NEEDS_CONSTRUCTING (type) + && (DECL_INITIAL (decl) == NULL_TREE + || DECL_INITIAL (decl) == error_mark_node) + /* If we say -fconserve-space, we want this to save space, + at the expense of wrong semantics. */ + && ! flag_conserve_space) + { + tree value = digest_init (type, empty_init_node, (tree *) 0); + DECL_INITIAL (decl) = value; + } + } + else if (TREE_CODE (decl) == VAR_DECL + && TREE_CODE (type) != REFERENCE_TYPE + && (TYPE_READONLY (type) || TREE_READONLY (decl))) + { + /* ``Unless explicitly declared extern, a const object does not have + external linkage and must be initialized. ($8.4; $12.1)'' ARM 7.1.6 + However, if it's `const int foo = 1; const int foo;', don't complain + about the second decl, since it does have an initializer before. + We deliberately don't complain about arrays, because they're + supposed to be initialized by a constructor. */ + if (! DECL_INITIAL (decl) + && TREE_CODE (type) != ARRAY_TYPE + && (!pedantic || !current_class_type)) + cp_error ("uninitialized const `%#D'", decl); + } + + /* For top-level declaration, the initial value was read in + the temporary obstack. MAXINDEX, rtl, etc. to be made below + must go in the permanent obstack; but don't discard the + temporary data yet. */ + + if (current_binding_level == global_binding_level && temporary) + end_temporary_allocation (); + + /* Deduce size of array from initialization, if not already known. */ + + if (TREE_CODE (type) == ARRAY_TYPE + && TYPE_DOMAIN (type) == NULL_TREE + && TREE_CODE (decl) != TYPE_DECL) + { + int do_default + = (TREE_STATIC (decl) + /* Even if pedantic, an external linkage array + may have incomplete type at first. */ + ? pedantic && ! DECL_EXTERNAL (decl) + : !DECL_EXTERNAL (decl)); + tree initializer = init ? init : DECL_INITIAL (decl); + int failure = complete_array_type (type, initializer, do_default); + + if (failure == 1) + cp_error ("initializer fails to determine size of `%D'", decl); + + if (failure == 2) + { + if (do_default) + cp_error ("array size missing in `%D'", decl); + /* If a `static' var's size isn't known, make it extern as + well as static, so it does not get allocated. If it's not + `static', then don't mark it extern; finish_incomplete_decl + will give it a default size and it will get allocated. */ + else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl)) + DECL_EXTERNAL (decl) = 1; + } + + if (pedantic && TYPE_DOMAIN (type) != NULL_TREE + && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), + integer_zero_node)) + cp_error ("zero-size array `%D'", decl); + + layout_decl (decl, 0); + } + + if (TREE_CODE (decl) == VAR_DECL) + { + if (DECL_SIZE (decl) == NULL_TREE + && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) + layout_decl (decl, 0); + + if (TREE_STATIC (decl) && DECL_SIZE (decl) == NULL_TREE) + { + /* A static variable with an incomplete type: + that is an error if it is initialized. + Otherwise, let it through, but if it is not `extern' + then it may cause an error message later. */ + if (DECL_INITIAL (decl) != NULL_TREE) + cp_error ("storage size of `%D' isn't known", decl); + init = NULL_TREE; + } + else if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE) + { + /* An automatic variable with an incomplete type: that is an error. + Don't talk about array types here, since we took care of that + message in grokdeclarator. */ + cp_error ("storage size of `%D' isn't known", decl); + TREE_TYPE (decl) = error_mark_node; + } + else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype)) + /* Let debugger know it should output info for this type. */ + note_debug_info_needed (ttype); + + if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl)) + && DECL_SIZE (decl) != NULL_TREE + && ! TREE_CONSTANT (DECL_SIZE (decl))) + { + if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST) + constant_expression_warning (DECL_SIZE (decl)); + else + cp_error ("storage size of `%D' isn't constant", decl); + } + + if (!DECL_EXTERNAL (decl) && TYPE_NEEDS_DESTRUCTOR (type)) + { + int yes = suspend_momentary (); + + /* If INIT comes from a functional cast, use the cleanup + we built for that. Otherwise, make our own cleanup. */ + if (init && TREE_CODE (init) == WITH_CLEANUP_EXPR + && comptypes (TREE_TYPE (decl), TREE_TYPE (init), 1)) + { + cleanup = TREE_OPERAND (init, 2); + init = TREE_OPERAND (init, 0); + current_binding_level->have_cleanups = 1; + current_binding_level->more_exceptions_ok = 0; + } + else + cleanup = maybe_build_cleanup (decl); + resume_momentary (yes); + } + } + /* PARM_DECLs get cleanups, too. */ + else if (TREE_CODE (decl) == PARM_DECL && TYPE_NEEDS_DESTRUCTOR (type)) + { + if (temporary) + end_temporary_allocation (); + cleanup = maybe_build_cleanup (decl); + if (temporary) + resume_temporary_allocation (); + } + + /* Output the assembler code and/or RTL code for variables and functions, + unless the type is an undefined structure or union. + If not, it will get done when the type is completed. */ + + if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL + || TREE_CODE (decl) == RESULT_DECL) + { + /* ??? FIXME: What about nested classes? */ + int toplev = (current_binding_level == global_binding_level + || pseudo_global_level_p ()); + int was_temp + = ((flag_traditional + || (TREE_STATIC (decl) && TYPE_NEEDS_DESTRUCTOR (type))) + && allocation_temporary_p ()); + + if (was_temp) + end_temporary_allocation (); + + /* If we are in need of a cleanup, get out of any implicit + handlers that have been established so far. */ + if (cleanup && current_binding_level->parm_flag == 3) + { + pop_implicit_try_blocks (decl); + current_binding_level->more_exceptions_ok = 0; + } + + if (TREE_CODE (decl) == VAR_DECL + && current_binding_level != global_binding_level + && ! TREE_STATIC (decl) + && type_needs_gc_entry (type)) + DECL_GC_OFFSET (decl) = size_int (++current_function_obstack_index); + + if (TREE_CODE (decl) == VAR_DECL && DECL_VIRTUAL_P (decl)) + make_decl_rtl (decl, NULL_PTR, toplev); + else if (TREE_CODE (decl) == VAR_DECL + && TREE_READONLY (decl) + && DECL_INITIAL (decl) != NULL_TREE + && DECL_INITIAL (decl) != error_mark_node + && DECL_INITIAL (decl) != empty_init_node) + { + DECL_INITIAL (decl) = save_expr (DECL_INITIAL (decl)); + + if (asmspec) + DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec); + + if (! toplev + && TREE_STATIC (decl) + && ! TREE_SIDE_EFFECTS (decl) + && ! TREE_PUBLIC (decl) + && ! DECL_EXTERNAL (decl) + && ! TYPE_NEEDS_DESTRUCTOR (type) + && DECL_MODE (decl) != BLKmode) + { + /* If this variable is really a constant, then fill its DECL_RTL + slot with something which won't take up storage. + If something later should take its address, we can always give + it legitimate RTL at that time. */ + DECL_RTL (decl) = gen_reg_rtx (DECL_MODE (decl)); + store_expr (DECL_INITIAL (decl), DECL_RTL (decl), 0); + TREE_ASM_WRITTEN (decl) = 1; + } + else if (toplev) + { + /* Keep GCC from complaining that this variable + is defined but never used. */ + TREE_USED (decl) = 1; + /* If this is a static const, change its apparent linkage + if it belongs to a #pragma interface. */ + if (TREE_STATIC (decl) && !interface_unknown) + { + TREE_PUBLIC (decl) = 1; + DECL_EXTERNAL (decl) = interface_only; + } + make_decl_rtl (decl, asmspec, toplev); + } + else + rest_of_decl_compilation (decl, asmspec, toplev, 0); + } + else if (TREE_CODE (decl) == VAR_DECL + && DECL_LANG_SPECIFIC (decl) + && DECL_IN_AGGR_P (decl)) + { + if (TREE_STATIC (decl)) + { + if (init == NULL_TREE +#ifdef DEFAULT_STATIC_DEFS + /* If this code is dead, then users must + explicitly declare static member variables + outside the class def'n as well. */ + && TYPE_NEEDS_CONSTRUCTING (type) +#endif + ) + { + DECL_EXTERNAL (decl) = 1; + make_decl_rtl (decl, asmspec, 1); + } + else + rest_of_decl_compilation (decl, asmspec, toplev, 0); + } + else + /* Just a constant field. Should not need any rtl. */ + goto finish_end0; + } + else + rest_of_decl_compilation (decl, asmspec, toplev, 0); + + if (was_temp) + resume_temporary_allocation (); + + if (type != error_mark_node + && TYPE_LANG_SPECIFIC (type) + && CLASSTYPE_ABSTRACT_VIRTUALS (type)) + abstract_virtuals_error (decl, type); + else if ((TREE_CODE (type) == FUNCTION_TYPE + || TREE_CODE (type) == METHOD_TYPE) + && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) + && CLASSTYPE_ABSTRACT_VIRTUALS (TREE_TYPE (type))) + abstract_virtuals_error (decl, TREE_TYPE (type)); + + if (TYPE_LANG_SPECIFIC (type) && IS_SIGNATURE (type)) + signature_error (decl, type); + else if ((TREE_CODE (type) == FUNCTION_TYPE + || TREE_CODE (type) == METHOD_TYPE) + && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) + && IS_SIGNATURE (TREE_TYPE (type))) + signature_error (decl, TREE_TYPE (type)); + + if (TREE_CODE (decl) == FUNCTION_DECL) + { + /* C++: Handle overloaded functions with default parameters. */ + if (DECL_OVERLOADED (decl)) + { + tree parmtypes = TYPE_ARG_TYPES (type); + tree prev = NULL_TREE; + tree original_name = DECL_NAME (decl); + struct lang_decl *tmp_lang_decl = DECL_LANG_SPECIFIC (decl); + /* All variants will share an uncollectible lang_decl. */ + copy_decl_lang_specific (decl); + + while (parmtypes && parmtypes != void_list_node) + { + /* The default value for the parameter in parmtypes is + stored in the TREE_PURPOSE of the TREE_LIST. */ + if (TREE_PURPOSE (parmtypes)) + { + tree fnname, fndecl; + tree *argp; + + argp = prev ? & TREE_CHAIN (prev) + : & TYPE_ARG_TYPES (type); + + *argp = NULL_TREE; + fnname = build_decl_overload (original_name, TYPE_ARG_TYPES (type), 0); + *argp = parmtypes; + fndecl = build_decl (FUNCTION_DECL, fnname, type); + DECL_EXTERNAL (fndecl) = DECL_EXTERNAL (decl); + TREE_PUBLIC (fndecl) = TREE_PUBLIC (decl); + DECL_INLINE (fndecl) = DECL_INLINE (decl); + /* Keep G++ from thinking this function is unused. + It is only used to speed up search in name space. */ + TREE_USED (fndecl) = 1; + TREE_ASM_WRITTEN (fndecl) = 1; + DECL_INITIAL (fndecl) = NULL_TREE; + DECL_LANG_SPECIFIC (fndecl) = DECL_LANG_SPECIFIC (decl); + fndecl = pushdecl (fndecl); + DECL_INITIAL (fndecl) = error_mark_node; + DECL_RTL (fndecl) = DECL_RTL (decl); + } + prev = parmtypes; + parmtypes = TREE_CHAIN (parmtypes); + } + DECL_LANG_SPECIFIC (decl) = tmp_lang_decl; + } + } + else if (DECL_EXTERNAL (decl)) + ; + else if (TREE_STATIC (decl) && type != error_mark_node) + { + /* Cleanups for static variables are handled by `finish_file'. */ + if (TYPE_NEEDS_CONSTRUCTING (type) || init != NULL_TREE) + expand_static_init (decl, init); + else if (TYPE_NEEDS_DESTRUCTOR (type)) + static_aggregates = perm_tree_cons (NULL_TREE, decl, + static_aggregates); + + /* Make entry in appropriate vector. */ + if (flag_gc && type_needs_gc_entry (type)) + build_static_gc_entry (decl, type); + } + else if (! toplev) + { + /* This is a declared decl which must live until the + end of the binding contour. It may need a cleanup. */ + + /* Recompute the RTL of a local array now + if it used to be an incomplete type. */ + if (was_incomplete && ! TREE_STATIC (decl)) + { + /* If we used it already as memory, it must stay in memory. */ + TREE_ADDRESSABLE (decl) = TREE_USED (decl); + /* If it's still incomplete now, no init will save it. */ + if (DECL_SIZE (decl) == NULL_TREE) + DECL_INITIAL (decl) = NULL_TREE; + expand_decl (decl); + } + else if (! TREE_ASM_WRITTEN (decl) + && (TYPE_SIZE (type) != NULL_TREE + || TREE_CODE (type) == ARRAY_TYPE)) + { + /* Do this here, because we did not expand this decl's + rtl in start_decl. */ + if (DECL_RTL (decl) == NULL_RTX) + expand_decl (decl); + else if (cleanup) + { + expand_decl_cleanup (NULL_TREE, cleanup); + /* Cleanup used up here. */ + cleanup = NULL_TREE; + } + } + + if (DECL_SIZE (decl) && type != error_mark_node) + { + /* Compute and store the initial value. */ + expand_decl_init (decl); + + if (init || TYPE_NEEDS_CONSTRUCTING (type)) + { + emit_line_note (DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl)); + expand_aggr_init (decl, init, 0); + } + + /* Set this to 0 so we can tell whether an aggregate + which was initialized was ever used. */ + if (TYPE_NEEDS_CONSTRUCTING (type)) + TREE_USED (decl) = 0; + + /* Store the cleanup, if there was one. */ + if (cleanup) + { + if (! expand_decl_cleanup (decl, cleanup)) + cp_error ("parser lost in parsing declaration of `%D'", decl); + } + } + } + finish_end0: + + /* Undo call to `pushclass' that was done in `start_decl' + due to initialization of qualified member variable. + I.e., Foo::x = 10; */ + { + tree context = DECL_CONTEXT (decl); + if (context + && TREE_CODE_CLASS (TREE_CODE (context)) == 't' + && (TREE_CODE (decl) == VAR_DECL + /* We also have a pushclass done that we need to undo here + if we're at top level and declare a method. */ + || (TREE_CODE (decl) == FUNCTION_DECL + /* If size hasn't been set, we're still defining it, + and therefore inside the class body; don't pop + the binding level.. */ + && TYPE_SIZE (context) != NULL_TREE + /* The binding level gets popped elsewhere for a + friend declaration inside another class. */ + /* + && TYPE_IDENTIFIER (context) == current_class_name + */ + && context == current_class_type + ))) + popclass (1); + } + } + + finish_end: + + if (need_pop) + { + /* Resume permanent allocation, if not within a function. */ + /* The corresponding push_obstacks_nochange is in start_decl, + start_method, groktypename, and in grokfield. */ + pop_obstacks (); + } + + if (was_readonly) + TREE_READONLY (decl) = 1; + + if (flag_cadillac) + cadillac_finish_decl (decl); +} + +void +expand_static_init (decl, init) + tree decl; + tree init; +{ + tree oldstatic = value_member (decl, static_aggregates); + if (oldstatic) + { + if (TREE_PURPOSE (oldstatic) && init != NULL_TREE) + cp_error ("multiple initializations given for `%D'", decl); + } + else if (current_binding_level != global_binding_level) + { + /* Emit code to perform this initialization but once. */ + tree temp; + + /* Remember this information until end of file. */ + push_obstacks (&permanent_obstack, &permanent_obstack); + + /* Emit code to perform this initialization but once. */ + temp = get_temp_name (integer_type_node, 1); + rest_of_decl_compilation (temp, NULL_PTR, 0, 0); + expand_start_cond (build_binary_op (EQ_EXPR, temp, + integer_zero_node, 1), 0); + expand_assignment (temp, integer_one_node, 0, 0); + if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))) + { + expand_aggr_init (decl, init, 0); + do_pending_stack_adjust (); + } + else + expand_assignment (decl, init, 0, 0); + expand_end_cond (); + if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (decl))) + { + static_aggregates = perm_tree_cons (temp, decl, static_aggregates); + TREE_STATIC (static_aggregates) = 1; + } + + /* Resume old (possibly temporary) allocation. */ + pop_obstacks (); + } + else + { + /* This code takes into account memory allocation + policy of `start_decl'. Namely, if TYPE_NEEDS_CONSTRUCTING + does not hold for this object, then we must make permanent + the storage currently in the temporary obstack. */ + if (! TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))) + preserve_initializer (); + static_aggregates = perm_tree_cons (init, decl, static_aggregates); + } +} + +/* Make TYPE a complete type based on INITIAL_VALUE. + Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered, + 2 if there was no information (in which case assume 1 if DO_DEFAULT). */ + +int +complete_array_type (type, initial_value, do_default) + tree type, initial_value; + int do_default; +{ + register tree maxindex = NULL_TREE; + int value = 0; + + if (initial_value) + { + /* Note MAXINDEX is really the maximum index, + one less than the size. */ + if (TREE_CODE (initial_value) == STRING_CST) + maxindex = build_int_2 (TREE_STRING_LENGTH (initial_value) - 1, 0); + else if (TREE_CODE (initial_value) == CONSTRUCTOR) + { + register int nelts + = list_length (CONSTRUCTOR_ELTS (initial_value)); + maxindex = build_int_2 (nelts - 1, - (nelts == 0)); + } + else + { + /* Make an error message unless that happened already. */ + if (initial_value != error_mark_node) + value = 1; + + /* Prevent further error messages. */ + maxindex = build_int_2 (0, 0); + } + } + + if (!maxindex) + { + if (do_default) + maxindex = build_int_2 (0, 0); + value = 2; + } + + if (maxindex) + { + TYPE_DOMAIN (type) = build_index_type (maxindex); + if (!TREE_TYPE (maxindex)) + TREE_TYPE (maxindex) = TYPE_DOMAIN (type); + } + + /* Lay out the type now that we can get the real answer. */ + + layout_type (type); + + return value; +} + +/* Return zero if something is declared to be a member of type + CTYPE when in the context of CUR_TYPE. STRING is the error + message to print in that case. Otherwise, quietly return 1. */ +static int +member_function_or_else (ctype, cur_type, string) + tree ctype, cur_type; + char *string; +{ + if (ctype && ctype != cur_type) + { + error (string, TYPE_NAME_STRING (ctype)); + return 0; + } + return 1; +} + +/* Subroutine of `grokdeclarator'. */ + +/* Generate errors possibly applicable for a given set of specifiers. + This is for ARM $7.1.2. */ +static void +bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises) + tree object; + char *type; + int virtualp, quals, friendp, raises, inlinep; +{ + if (virtualp) + cp_error ("`%D' declared as a `virtual' %s", object, type); + if (inlinep) + cp_error ("`%D' declared as an `inline' %s", object, type); + if (quals) + cp_error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration", object, type); + if (friendp) + cp_error_at ("invalid friend declaration", object); + if (raises) + cp_error_at ("invalid raises declaration", object); +} + +/* CTYPE is class type, or null if non-class. + TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE + or METHOD_TYPE. + DECLARATOR is the function's name. + VIRTUALP is truthvalue of whether the function is virtual or not. + FLAGS are to be passed through to `grokclassfn'. + QUALS are qualifiers indicating whether the function is `const' + or `volatile'. + RAISES is a list of exceptions that this function can raise. + CHECK is 1 if we must find this method in CTYPE, 0 if we should + not look, and -1 if we should not call `grokclassfn' at all. */ +static tree +grokfndecl (ctype, type, declarator, virtualp, flags, quals, raises, check, publicp) + tree ctype, type; + tree declarator; + int virtualp; + enum overload_flags flags; + tree quals, raises; + int check, publicp; +{ + tree cname, decl; + int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE; + + if (ctype) + cname = TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL + ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype); + else + cname = NULL_TREE; + + if (raises) + { + type = build_exception_variant (ctype, type, raises); + raises = TYPE_RAISES_EXCEPTIONS (type); + } + decl = build_lang_decl (FUNCTION_DECL, declarator, type); + /* propagate volatile out from type to decl */ + if (TYPE_VOLATILE (type)) + TREE_THIS_VOLATILE (decl) = 1; + + /* Should probably propagate const out from type to decl I bet (mrs). */ + if (staticp) + { + DECL_STATIC_FUNCTION_P (decl) = 1; + DECL_CONTEXT (decl) = ctype; + DECL_CLASS_CONTEXT (decl) = ctype; + } + + if (publicp) + TREE_PUBLIC (decl) = 1; + + DECL_EXTERNAL (decl) = 1; + if (quals != NULL_TREE && TREE_CODE (type) == FUNCTION_TYPE) + { + cp_error ("%smember function `%D' cannot have `%T' method qualifier", + (ctype ? "static " : "non-"), decl, TREE_VALUE (quals)); + quals = NULL_TREE; + } + + if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))) + grok_op_properties (decl, virtualp, check < 0); + + /* Caller will do the rest of this. */ + if (check < 0) + return decl; + + if (flags == NO_SPECIAL && ctype && constructor_name (cname) == declarator) + { + tree tmp; + /* Just handle constructors here. We could do this + inside the following if stmt, but I think + that the code is more legible by breaking this + case out. See comments below for what each of + the following calls is supposed to do. */ + DECL_CONSTRUCTOR_P (decl) = 1; + + grokclassfn (ctype, declarator, decl, flags, quals); + if (check) + check_classfn (ctype, declarator, decl); + grok_ctor_properties (ctype, decl); + if (check == 0) + { + /* FIXME: this should only need to look at IDENTIFIER_GLOBAL_VALUE. */ + tmp = lookup_name (DECL_ASSEMBLER_NAME (decl), 0); + if (tmp == NULL_TREE) + IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (decl)) = decl; + else if (TREE_CODE (tmp) != TREE_CODE (decl)) + cp_error ("inconsistent declarations for `%D'", decl); + else + { + duplicate_decls (decl, tmp); + decl = tmp; + /* avoid creating circularities. */ + DECL_CHAIN (decl) = NULL_TREE; + } + make_decl_rtl (decl, NULL_PTR, 1); + } + } + else + { + tree tmp; + + /* Function gets the ugly name, field gets the nice one. + This call may change the type of the function (because + of default parameters)! */ + if (ctype != NULL_TREE) + grokclassfn (ctype, cname, decl, flags, quals); + + if (ctype != NULL_TREE && check) + check_classfn (ctype, cname, decl); + + if (ctype == NULL_TREE || check) + return decl; + + /* Now install the declaration of this function so that + others may find it (esp. its DECL_FRIENDLIST). + Pretend we are at top level, we will get true + reference later, perhaps. + + FIXME: This should only need to look at IDENTIFIER_GLOBAL_VALUE. */ + tmp = lookup_name (DECL_ASSEMBLER_NAME (decl), 0); + if (tmp == NULL_TREE) + IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (decl)) = decl; + else if (TREE_CODE (tmp) != TREE_CODE (decl)) + cp_error ("inconsistent declarations for `%D'", decl); + else + { + duplicate_decls (decl, tmp); + decl = tmp; + /* avoid creating circularities. */ + DECL_CHAIN (decl) = NULL_TREE; + } + make_decl_rtl (decl, NULL_PTR, 1); + + /* If this declaration supersedes the declaration of + a method declared virtual in the base class, then + mark this field as being virtual as well. */ + { + tree binfos = BINFO_BASETYPES (TYPE_BINFO (ctype)); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + if (TYPE_VIRTUAL_P (BINFO_TYPE (base_binfo)) || flag_all_virtual == 1) + { + tmp = get_first_matching_virtual (base_binfo, decl, + flags == DTOR_FLAG); + if (tmp) + { + /* If this function overrides some virtual in some base + class, then the function itself is also necessarily + virtual, even if the user didn't explicitly say so. */ + DECL_VIRTUAL_P (decl) = 1; + + /* The TMP we really want is the one from the deepest + baseclass on this path, taking care not to + duplicate if we have already found it (via another + path to its virtual baseclass. */ + if (staticp) + { + cp_error ("method `%D' may not be declared static", decl); + cp_error_at ("(since `%D' declared virtual in base class.)", tmp); + break; + } + virtualp = 1; + +#if 0 + /* Disable this as we want the most recent fndecl, not the most + base fndecl. */ + if ((TYPE_USES_VIRTUAL_BASECLASSES (BINFO_TYPE (base_binfo)) + || TYPE_USES_MULTIPLE_INHERITANCE (ctype)) + && BINFO_TYPE (base_binfo) != DECL_CONTEXT (tmp)) + tmp = get_first_matching_virtual (TYPE_BINFO (DECL_CONTEXT (tmp)), + decl, flags == DTOR_FLAG); +#endif + if (value_member (tmp, DECL_VINDEX (decl)) == NULL_TREE) + { + /* The argument types may have changed... */ + tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl)); + tree base_variant = TREE_TYPE (TREE_VALUE (argtypes)); + + argtypes = commonparms (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (tmp))), + TREE_CHAIN (argtypes)); + /* But the return type has not. */ + type = build_cplus_method_type (base_variant, TREE_TYPE (type), argtypes); + if (raises) + { + type = build_exception_variant (ctype, type, raises); + raises = TYPE_RAISES_EXCEPTIONS (type); + } + TREE_TYPE (decl) = type; + DECL_VINDEX (decl) + = tree_cons (NULL_TREE, tmp, DECL_VINDEX (decl)); + } + } + } + } + } + if (virtualp) + { + if (DECL_VINDEX (decl) == NULL_TREE) + DECL_VINDEX (decl) = error_mark_node; + IDENTIFIER_VIRTUAL_P (DECL_NAME (decl)) = 1; + if (ctype && CLASSTYPE_VTABLE_NEEDS_WRITING (ctype) + /* If this function is derived from a template, don't + make it public. This shouldn't be here, but there's + no good way to override the interface pragmas for one + function or class only. Bletch. */ + && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (ctype)) == NULL_TREE + && (write_virtuals == 2 + || (write_virtuals == 3 + && CLASSTYPE_INTERFACE_KNOWN (ctype)))) + TREE_PUBLIC (decl) = 1; + } + } + return decl; +} + +static tree +grokvardecl (type, declarator, specbits, initialized) + tree type; + tree declarator; + RID_BIT_TYPE specbits; + int initialized; +{ + tree decl; + + if (TREE_CODE (type) == OFFSET_TYPE) + { + /* If you declare a static member so that it + can be initialized, the code will reach here. */ + tree field = lookup_field (TYPE_OFFSET_BASETYPE (type), + declarator, 0, 0); + if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL) + { + tree basetype = TYPE_OFFSET_BASETYPE (type); + error ("`%s' is not a static member of class `%s'", + IDENTIFIER_POINTER (declarator), + TYPE_NAME_STRING (basetype)); + type = TREE_TYPE (type); + decl = build_lang_field_decl (VAR_DECL, declarator, type); + DECL_CONTEXT (decl) = basetype; + DECL_CLASS_CONTEXT (decl) = basetype; + } + else + { + tree f_type = TREE_TYPE (field); + tree o_type = TREE_TYPE (type); + + if (TYPE_SIZE (f_type) == NULL_TREE) + { + if (TREE_CODE (f_type) != TREE_CODE (o_type) + || (TREE_CODE (f_type) == ARRAY_TYPE + && TREE_TYPE (f_type) != TREE_TYPE (o_type))) + error ("redeclaration of type for `%s'", + IDENTIFIER_POINTER (declarator)); + else if (TYPE_SIZE (o_type) != NULL_TREE) + TREE_TYPE (field) = type; + } + else if (f_type != o_type) + error ("redeclaration of type for `%s'", + IDENTIFIER_POINTER (declarator)); + decl = field; + if (initialized && DECL_INITIAL (decl) + /* Complain about multiply-initialized + member variables, but don't be faked + out if initializer is faked up from `empty_init_node'. */ + && (TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR + || CONSTRUCTOR_ELTS (DECL_INITIAL (decl)) != NULL_TREE)) + error_with_aggr_type (DECL_CONTEXT (decl), + "multiple initializations of static member `%s::%s'", + IDENTIFIER_POINTER (DECL_NAME (decl))); + } + } + else + decl = build_decl (VAR_DECL, declarator, type); + + if (RIDBIT_SETP (RID_EXTERN, specbits)) + { + DECL_THIS_EXTERN (decl) = 1; + DECL_EXTERNAL (decl) = !initialized; + } + + /* In class context, static means one per class, + public access, and static storage. */ + if (DECL_FIELD_CONTEXT (decl) != NULL_TREE + && IS_AGGR_TYPE (DECL_FIELD_CONTEXT (decl))) + { + TREE_PUBLIC (decl) = 1; + TREE_STATIC (decl) = 1; + DECL_EXTERNAL (decl) = !initialized; + } + /* At top level, either `static' or no s.c. makes a definition + (perhaps tentative), and absence of `static' makes it public. */ + else if (current_binding_level == global_binding_level) + { + TREE_PUBLIC (decl) = RIDBIT_NOTSETP (RID_STATIC, specbits); + TREE_STATIC (decl) = ! DECL_EXTERNAL (decl); + } + /* Not at top level, only `static' makes a static definition. */ + else + { + TREE_STATIC (decl) = !! RIDBIT_SETP (RID_STATIC, specbits); + TREE_PUBLIC (decl) = DECL_EXTERNAL (decl); + } + return decl; +} + +/* Create a canonical pointer to member function type. */ + +tree +build_ptrmemfunc_type (type) + tree type; +{ + tree fields[4]; + tree t; + tree u; + + /* If a canonical type already exists for this type, use it. We use + this method instead of type_hash_canon, because it only does a + simple equality check on the list of field members. */ + + if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type))) + return t; + + push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type)); + + u = make_lang_type (UNION_TYPE); + fields[0] = build_lang_field_decl (FIELD_DECL, pfn_identifier, type); + fields[1] = build_lang_field_decl (FIELD_DECL, delta2_identifier, delta_type_node); + finish_builtin_type (u, "__ptrmemfunc_type", fields, 1, ptr_type_node); + TYPE_NAME (u) = NULL_TREE; + + t = make_lang_type (RECORD_TYPE); + + /* Let the front-end know this is a pointer to member function. */ + TYPE_PTRMEMFUNC_FLAG(t) = 1; + + fields[0] = build_lang_field_decl (FIELD_DECL, delta_identifier, delta_type_node); + fields[1] = build_lang_field_decl (FIELD_DECL, index_identifier, delta_type_node); + fields[2] = build_lang_field_decl (FIELD_DECL, pfn_or_delta2_identifier, u); + finish_builtin_type (t, "__ptrmemfunc_type", fields, 2, ptr_type_node); + + pop_obstacks (); + + /* Zap out the name so that the back-end will give us the debugging + information for this anonymous RECORD_TYPE. */ + TYPE_NAME (t) = NULL_TREE; + + TYPE_SET_PTRMEMFUNC_TYPE (type, t); + + /* Seems to be wanted. */ + CLASSTYPE_GOT_SEMICOLON (t) = 1; + return t; +} + +/* Given declspecs and a declarator, + determine the name and type of the object declared + and construct a ..._DECL node for it. + (In one case we can return a ..._TYPE node instead. + For invalid input we sometimes return 0.) + + DECLSPECS is a chain of tree_list nodes whose value fields + are the storage classes and type specifiers. + + DECL_CONTEXT says which syntactic context this declaration is in: + NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL. + FUNCDEF for a function definition. Like NORMAL but a few different + error messages in each case. Return value may be zero meaning + this definition is too screwy to try to parse. + MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to + handle member functions (which have FIELD context). + Return value may be zero meaning this definition is too screwy to + try to parse. + PARM for a parameter declaration (either within a function prototype + or before a function body). Make a PARM_DECL, or return void_type_node. + TYPENAME if for a typename (in a cast or sizeof). + Don't make a DECL node; just return the ..._TYPE node. + FIELD for a struct or union field; make a FIELD_DECL. + BITFIELD for a field with specified width. + INITIALIZED is 1 if the decl has an initializer. + + In the TYPENAME case, DECLARATOR is really an absolute declarator. + It may also be so in the PARM case, for a prototype where the + argument type is specified but not the name. + + This function is where the complicated C meanings of `static' + and `extern' are interpreted. + + For C++, if there is any monkey business to do, the function which + calls this one must do it, i.e., prepending instance variables, + renaming overloaded function names, etc. + + Note that for this C++, it is an error to define a method within a class + which does not belong to that class. + + Except in the case where SCOPE_REFs are implicitly known (such as + methods within a class being redundantly qualified), + declarations which involve SCOPE_REFs are returned as SCOPE_REFs + (class_name::decl_name). The caller must also deal with this. + + If a constructor or destructor is seen, and the context is FIELD, + then the type gains the attribute TREE_HAS_x. If such a declaration + is erroneous, NULL_TREE is returned. + + QUALS is used only for FUNCDEF and MEMFUNCDEF cases. For a member + function, these are the qualifiers to give to the `this' pointer. + + May return void_type_node if the declarator turned out to be a friend. + See grokfield for details. */ + +enum return_types { return_normal, return_ctor, return_dtor, return_conversion }; + +tree +grokdeclarator (declarator, declspecs, decl_context, initialized, raises) + tree declspecs; + tree declarator; + enum decl_context decl_context; + int initialized; + tree raises; +{ + RID_BIT_TYPE specbits; + int nclasses = 0; + tree spec; + tree type = NULL_TREE; + int longlong = 0; + int constp; + int volatilep; + int virtualp, friendp, inlinep, staticp; + int explicit_int = 0; + int explicit_char = 0; + int opaque_typedef = 0; + tree typedef_decl = NULL_TREE; + char *name; + tree typedef_type = NULL_TREE; + int funcdef_flag = 0; + enum tree_code innermost_code = ERROR_MARK; + int bitfield = 0; + int size_varies = 0; + /* Set this to error_mark_node for FIELD_DECLs we could not handle properly. + All FIELD_DECLs we build here have `init' put into their DECL_INITIAL. */ + tree init = NULL_TREE; + + /* Keep track of what sort of function is being processed + so that we can warn about default return values, or explicit + return values which do not match prescribed defaults. */ + enum return_types return_type = return_normal; + + tree dname = NULL_TREE; + tree ctype = current_class_type; + tree ctor_return_type = NULL_TREE; + enum overload_flags flags = NO_SPECIAL; + int seen_scope_ref = 0; + tree quals = NULL_TREE; + + RIDBIT_RESET_ALL (specbits); + if (decl_context == FUNCDEF) + funcdef_flag = 1, decl_context = NORMAL; + else if (decl_context == MEMFUNCDEF) + funcdef_flag = -1, decl_context = FIELD; + else if (decl_context == BITFIELD) + bitfield = 1, decl_context = FIELD; + + if (flag_traditional && allocation_temporary_p ()) + end_temporary_allocation (); + + /* Look inside a declarator for the name being declared + and get it as a string, for an error message. */ + { + tree type, last = NULL_TREE; + register tree decl = declarator; + name = NULL; + + while (decl) + switch (TREE_CODE (decl)) + { + case COND_EXPR: + ctype = NULL_TREE; + decl = TREE_OPERAND (decl, 0); + break; + + case BIT_NOT_EXPR: /* for C++ destructors! */ + { + tree name = TREE_OPERAND (decl, 0); + tree rename = NULL_TREE; + + my_friendly_assert (flags == NO_SPECIAL, 152); + flags = DTOR_FLAG; + return_type = return_dtor; + my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 153); + if (ctype == NULL_TREE) + { + if (current_class_type == NULL_TREE) + { + error ("destructors must be member functions"); + flags = NO_SPECIAL; + } + else + { + tree t = constructor_name (current_class_name); + if (t != name) + rename = t; + } + } + else + { + tree t = constructor_name (ctype); + if (t != name) + rename = t; + } + + if (rename) + { + error ("destructor `%s' must match class name `%s'", + IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (rename)); + TREE_OPERAND (decl, 0) = rename; + } + decl = name; + } + break; + + case ADDR_EXPR: /* C++ reference declaration */ + /* fall through */ + case ARRAY_REF: + case INDIRECT_REF: + ctype = NULL_TREE; + innermost_code = TREE_CODE (decl); + last = decl; + decl = TREE_OPERAND (decl, 0); + break; + + case CALL_EXPR: + if (parmlist_is_exprlist (TREE_OPERAND (decl, 1))) + { + /* This is actually a variable declaration using constructor + syntax. We need to call start_decl and finish_decl so we + can get the variable initialized... */ + + if (last) + /* We need to insinuate ourselves into the declarator in place + of the CALL_EXPR. */ + TREE_OPERAND (last, 0) = TREE_OPERAND (decl, 0); + else + declarator = TREE_OPERAND (decl, 0); + + init = TREE_OPERAND (decl, 1); + + decl = start_decl (declarator, declspecs, 1, NULL_TREE); + finish_decl (decl, init, NULL_TREE, 1); + return 0; + } + innermost_code = TREE_CODE (decl); + decl = TREE_OPERAND (decl, 0); + if (decl_context == FIELD && ctype == NULL_TREE) + ctype = current_class_type; + if (ctype != NULL_TREE + && decl != NULL_TREE && flags != DTOR_FLAG + && decl == constructor_name (ctype)) + { + return_type = return_ctor; + ctor_return_type = ctype; + } + ctype = NULL_TREE; + break; + + case IDENTIFIER_NODE: + dname = decl; + name = IDENTIFIER_POINTER (decl); + decl = NULL_TREE; + break; + + case RECORD_TYPE: + case UNION_TYPE: + case ENUMERAL_TYPE: + /* Parse error puts this typespec where + a declarator should go. */ + error ("declarator name missing"); + dname = TYPE_NAME (decl); + if (dname && TREE_CODE (dname) == TYPE_DECL) + dname = DECL_NAME (dname); + name = dname ? IDENTIFIER_POINTER (dname) : "<nameless>"; + declspecs = temp_tree_cons (NULL_TREE, decl, declspecs); + decl = NULL_TREE; + break; + + case TYPE_EXPR: + my_friendly_assert (flags == NO_SPECIAL, 154); + flags = TYPENAME_FLAG; + name = "operator <typename>"; /* We don't know the type yet. */ + /* Go to the absdcl. */ + decl = TREE_OPERAND (decl, 0); + return_type = return_conversion; + break; + + /* C++ extension */ + case SCOPE_REF: +/* + if (seen_scope_ref == 1) + error ("multiple `::' terms in declarator invalid"); +*/ + seen_scope_ref += 1; + { + /* Perform error checking, and convert class names to types. + We may call grokdeclarator multiple times for the same + tree structure, so only do the conversion once. In this + case, we have exactly what we want for `ctype'. */ + tree cname = TREE_OPERAND (decl, 0); + if (cname == NULL_TREE) + ctype = NULL_TREE; + /* Can't use IS_AGGR_TYPE because CNAME might not be a type. */ + else if (IS_AGGR_TYPE_CODE (TREE_CODE (cname)) + || TREE_CODE (cname) == UNINSTANTIATED_P_TYPE) + ctype = cname; + else if (! is_aggr_typedef (cname, 1)) + { + TREE_OPERAND (decl, 0) = NULL_TREE; + } + /* Must test TREE_OPERAND (decl, 1), in case user gives + us `typedef (class::memfunc)(int); memfunc *memfuncptr;' */ + else if (TREE_OPERAND (decl, 1) + && TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF) + { + TREE_OPERAND (decl, 0) = IDENTIFIER_TYPE_VALUE (cname); + } + else if (ctype == NULL_TREE) + { + ctype = IDENTIFIER_TYPE_VALUE (cname); + TREE_OPERAND (decl, 0) = ctype; + } + else if (TREE_COMPLEXITY (decl) == current_class_depth) + TREE_OPERAND (decl, 0) = ctype; + else + { + if (! UNIQUELY_DERIVED_FROM_P (IDENTIFIER_TYPE_VALUE (cname), + ctype)) + { + cp_error ("type `%T' is not derived from type `%T'", + IDENTIFIER_TYPE_VALUE (cname), ctype); + TREE_OPERAND (decl, 0) = NULL_TREE; + } + else + { + ctype = IDENTIFIER_TYPE_VALUE (cname); + TREE_OPERAND (decl, 0) = ctype; + } + } + + decl = TREE_OPERAND (decl, 1); + if (ctype) + { + if (TREE_CODE (decl) == IDENTIFIER_NODE + && constructor_name (ctype) == decl) + { + return_type = return_ctor; + ctor_return_type = ctype; + } + else if (TREE_CODE (decl) == BIT_NOT_EXPR + && TREE_CODE (TREE_OPERAND (decl, 0)) == IDENTIFIER_NODE + && constructor_name (ctype) == TREE_OPERAND (decl, 0)) + { + return_type = return_dtor; + ctor_return_type = ctype; + flags = DTOR_FLAG; + decl = TREE_OPERAND (decl, 0); + } + } + } + break; + + case ERROR_MARK: + decl = NULL_TREE; + break; + + default: + return 0; /* We used to do a 155 abort here. */ + } + if (name == NULL) + name = "type name"; + } + + /* A function definition's declarator must have the form of + a function declarator. */ + + if (funcdef_flag && innermost_code != CALL_EXPR) + return 0; + + /* Anything declared one level down from the top level + must be one of the parameters of a function + (because the body is at least two levels down). */ + + /* This heuristic cannot be applied to C++ nodes! Fixed, however, + by not allowing C++ class definitions to specify their parameters + with xdecls (must be spec.d in the parmlist). + + Since we now wait to push a class scope until we are sure that + we are in a legitimate method context, we must set oldcname + explicitly (since current_class_name is not yet alive). */ + + if (decl_context == NORMAL + && current_binding_level->level_chain == global_binding_level) + decl_context = PARM; + + /* Look through the decl specs and record which ones appear. + Some typespecs are defined as built-in typenames. + Others, the ones that are modifiers of other types, + are represented by bits in SPECBITS: set the bits for + the modifiers that appear. Storage class keywords are also in SPECBITS. + + If there is a typedef name or a type, store the type in TYPE. + This includes builtin typedefs such as `int'. + + Set EXPLICIT_INT if the type is `int' or `char' and did not + come from a user typedef. + + Set LONGLONG if `long' is mentioned twice. + + For C++, constructors and destructors have their own fast treatment. */ + + for (spec = declspecs; spec; spec = TREE_CHAIN (spec)) + { + register int i; + register tree id; + + /* Certain parse errors slip through. For example, + `int class;' is not caught by the parser. Try + weakly to recover here. */ + if (TREE_CODE (spec) != TREE_LIST) + return 0; + + id = TREE_VALUE (spec); + + if (TREE_CODE (id) == IDENTIFIER_NODE) + { + if (id == ridpointers[(int) RID_INT]) + { + if (type) + error ("extraneous `int' ignored"); + else + { + explicit_int = 1; + type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id)); + } + goto found; + } + if (id == ridpointers[(int) RID_CHAR]) + { + if (type) + error ("extraneous `char' ignored"); + else + { + explicit_char = 1; + type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id)); + } + goto found; + } + if (id == ridpointers[(int) RID_WCHAR]) + { + if (type) + error ("extraneous `__wchar_t' ignored"); + else + { + type = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (id)); + } + goto found; + } + /* C++ aggregate types. */ + if (IDENTIFIER_HAS_TYPE_VALUE (id)) + { + if (type) + cp_error ("multiple declarations `%T' and `%T'", type, id); + else + type = IDENTIFIER_TYPE_VALUE (id); + goto found; + } + + for (i = (int) RID_FIRST_MODIFIER; i < (int) RID_MAX; i++) + { + if (ridpointers[i] == id) + { + if (i == (int) RID_LONG && RIDBIT_SETP (i, specbits)) + { +#if 0 + if (pedantic) + pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id)); + else +#endif + if (longlong) + error ("`long long long' is too long for GCC"); + else + longlong = 1; + } + else if (RIDBIT_SETP (i, specbits)) + warning ("duplicate `%s'", IDENTIFIER_POINTER (id)); + RIDBIT_SET (i, specbits); + goto found; + } + } + } + if (type) + error ("two or more data types in declaration of `%s'", name); + else if (TREE_CODE (id) == IDENTIFIER_NODE) + { + register tree t = lookup_name (id, 1); + if (!t || TREE_CODE (t) != TYPE_DECL) + error ("`%s' fails to be a typedef or built in type", + IDENTIFIER_POINTER (id)); + else + { + type = TREE_TYPE (t); + typedef_decl = t; + } + } + else if (TREE_CODE (id) != ERROR_MARK) + /* Can't change CLASS nodes into RECORD nodes here! */ + type = id; + + found: ; + } + + typedef_type = type; + + /* No type at all: default to `int', and set EXPLICIT_INT + because it was not a user-defined typedef. + Except when we have a `typedef' inside a signature, in + which case the type defaults to `unknown type' and is + instantiated when assigning to a signature pointer or ref. */ + + if (type == NULL_TREE) + { + explicit_int = -1; + if (return_type == return_dtor) + type = void_type_node; + else if (return_type == return_ctor) + type = TYPE_POINTER_TO (ctor_return_type); + else if (current_class_type + && IS_SIGNATURE (current_class_type) + && (RIDBIT_SETP (RID_TYPEDEF, specbits) + || SIGNATURE_GROKKING_TYPEDEF (current_class_type)) + && (decl_context == FIELD || decl_context == NORMAL)) + { + explicit_int = 0; + opaque_typedef = 1; + type = copy_node (opaque_type_node); + } + else + { + if (funcdef_flag && warn_return_type + && return_type == return_normal + && ! (RIDBIT_SETP (RID_SIGNED, specbits) + || RIDBIT_SETP (RID_UNSIGNED, specbits) + || RIDBIT_SETP (RID_LONG, specbits) + || RIDBIT_SETP (RID_SHORT, specbits))) + warn_about_return_type = 1; + /* Save warning until we know what is really going on. */ + type = integer_type_node; + } + } + else if (return_type == return_dtor) + { + error ("return type specification for destructor invalid"); + type = void_type_node; + } + else if (return_type == return_ctor) + { + error ("return type specification for constructor invalid"); + type = TYPE_POINTER_TO (ctor_return_type); + } + + ctype = NULL_TREE; + + /* Now process the modifiers that were specified + and check for invalid combinations. */ + + /* Long double is a special combination. */ + + if (RIDBIT_SETP (RID_LONG, specbits) + && TYPE_MAIN_VARIANT (type) == double_type_node) + { + RIDBIT_RESET (RID_LONG, specbits); + type = build_type_variant (long_double_type_node, TYPE_READONLY (type), + TYPE_VOLATILE (type)); + } + + /* Check all other uses of type modifiers. */ + + if (RIDBIT_SETP (RID_UNSIGNED, specbits) + || RIDBIT_SETP (RID_SIGNED, specbits) + || RIDBIT_SETP (RID_LONG, specbits) + || RIDBIT_SETP (RID_SHORT, specbits)) + { + int ok = 0; + + if (TREE_CODE (type) == REAL_TYPE) + error ("short, signed or unsigned invalid for `%s'", name); + else if (TREE_CODE (type) != INTEGER_TYPE || type == wchar_type_node) + error ("long, short, signed or unsigned invalid for `%s'", name); + else if (RIDBIT_SETP (RID_LONG, specbits) + && RIDBIT_SETP (RID_SHORT, specbits)) + error ("long and short specified together for `%s'", name); + else if ((RIDBIT_SETP (RID_LONG, specbits) + || RIDBIT_SETP (RID_SHORT, specbits)) + && explicit_char) + error ("long or short specified with char for `%s'", name); + else if ((RIDBIT_SETP (RID_LONG, specbits) + || RIDBIT_SETP (RID_SHORT, specbits)) + && TREE_CODE (type) == REAL_TYPE) + error ("long or short specified with floating type for `%s'", name); + else if (RIDBIT_SETP (RID_SIGNED, specbits) + && RIDBIT_SETP (RID_UNSIGNED, specbits)) + error ("signed and unsigned given together for `%s'", name); + else + { + ok = 1; + if (!explicit_int && !explicit_char && pedantic) + { + pedwarn ("long, short, signed or unsigned used invalidly for `%s'", + name); + if (flag_pedantic_errors) + ok = 0; + } + } + + /* Discard the type modifiers if they are invalid. */ + if (! ok) + { + RIDBIT_RESET (RID_UNSIGNED, specbits); + RIDBIT_RESET (RID_SIGNED, specbits); + RIDBIT_RESET (RID_LONG, specbits); + RIDBIT_RESET (RID_SHORT, specbits); + longlong = 0; + } + } + + /* Decide whether an integer type is signed or not. + Optionally treat bitfields as signed by default. */ + if (RIDBIT_SETP (RID_UNSIGNED, specbits) + /* Traditionally, all bitfields are unsigned. */ + || (bitfield && flag_traditional) + || (bitfield && ! flag_signed_bitfields + && (explicit_int || explicit_char + /* A typedef for plain `int' without `signed' + can be controlled just like plain `int'. */ + || ! (typedef_decl != NULL_TREE + && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))) + && TREE_CODE (type) != ENUMERAL_TYPE + && RIDBIT_NOTSETP (RID_SIGNED, specbits))) + { + if (longlong) + type = long_long_unsigned_type_node; + else if (RIDBIT_SETP (RID_LONG, specbits)) + type = long_unsigned_type_node; + else if (RIDBIT_SETP (RID_SHORT, specbits)) + type = short_unsigned_type_node; + else if (type == char_type_node) + type = unsigned_char_type_node; + else if (typedef_decl) + type = unsigned_type (type); + else + type = unsigned_type_node; + } + else if (RIDBIT_SETP (RID_SIGNED, specbits) + && type == char_type_node) + type = signed_char_type_node; + else if (longlong) + type = long_long_integer_type_node; + else if (RIDBIT_SETP (RID_LONG, specbits)) + type = long_integer_type_node; + else if (RIDBIT_SETP (RID_SHORT, specbits)) + type = short_integer_type_node; + + /* Set CONSTP if this declaration is `const', whether by + explicit specification or via a typedef. + Likewise for VOLATILEP. */ + + constp = !! RIDBIT_SETP (RID_CONST, specbits) + TYPE_READONLY (type); + volatilep = !! RIDBIT_SETP (RID_VOLATILE, specbits) + TYPE_VOLATILE (type); + staticp = 0; + inlinep = !! RIDBIT_SETP (RID_INLINE, specbits); + if (constp > 1) + warning ("duplicate `const'"); + if (volatilep > 1) + warning ("duplicate `volatile'"); + virtualp = RIDBIT_SETP (RID_VIRTUAL, specbits); + + /* operators new and delete are implicitly static. */ + if (RIDBIT_SETP (RID_STATIC, specbits)) + staticp = 1 + (decl_context == FIELD); + + if (virtualp && staticp == 2) + { + cp_error ("member `%D' cannot be declared both virtual and static", + dname); + staticp = 0; + } + friendp = RIDBIT_SETP (RID_FRIEND, specbits); + RIDBIT_RESET (RID_VIRTUAL, specbits); + RIDBIT_RESET (RID_FRIEND, specbits); + + if (RIDBIT_SETP (RID_MUTABLE, specbits)) + { + if (decl_context == PARM) + { + error ("non-member `%s' cannot be declared mutable", name); + RIDBIT_RESET (RID_MUTABLE, specbits); + } + else if (friendp || decl_context == TYPENAME) + { + error ("non-object member `%s' cannot be declared mutable", name); + RIDBIT_RESET (RID_MUTABLE, specbits); + } + else if (staticp) + { + error ("static `%s' cannot be declared mutable", name); + RIDBIT_RESET (RID_MUTABLE, specbits); + } +#if 0 + if (RIDBIT_SETP (RID_TYPEDEF, specbits)) + { + error ("non-object member `%s' cannot be declared mutable", name); + RIDBIT_RESET (RID_MUTABLE, specbits); + } + /* Because local typedefs are parsed twice, we don't want this + message here. */ + else if (decl_context != FIELD) + { + error ("non-member `%s' cannot be declared mutable", name); + RIDBIT_RESET (RID_MUTABLE, specbits); + } +#endif + } + + /* Warn if two storage classes are given. Default to `auto'. */ + + if (RIDBIT_ANY_SET (specbits)) + { + if (RIDBIT_SETP (RID_STATIC, specbits)) nclasses++; + if (RIDBIT_SETP (RID_EXTERN, specbits)) nclasses++; + if (decl_context == PARM && nclasses > 0) + error ("storage class specifiers invalid in parameter declarations"); + if (RIDBIT_SETP (RID_TYPEDEF, specbits)) + { + if (decl_context == PARM) + error ("typedef declaration invalid in parameter declaration"); + nclasses++; + } + if (RIDBIT_SETP (RID_AUTO, specbits)) nclasses++; + if (RIDBIT_SETP (RID_REGISTER, specbits)) nclasses++; + } + + /* Give error if `virtual' is used outside of class declaration. */ + if (virtualp && current_class_name == NULL_TREE) + { + error ("virtual outside class declaration"); + virtualp = 0; + } + if (current_class_name == NULL_TREE && RIDBIT_SETP (RID_MUTABLE, specbits)) + { + error ("only members can be declared mutable"); + RIDBIT_RESET (RID_MUTABLE, specbits); + } + + /* Static anonymous unions are dealt with here. */ + if (staticp && decl_context == TYPENAME + && TREE_CODE (declspecs) == TREE_LIST + && TREE_CODE (TREE_VALUE (declspecs)) == UNION_TYPE + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (TREE_VALUE (declspecs)))) + decl_context = FIELD; + + /* Give error if `const,' `volatile,' `inline,' `friend,' or `virtual' + is used in a signature member function declaration. */ + if (decl_context == FIELD + && IS_SIGNATURE (current_class_type) + && RIDBIT_NOTSETP(RID_TYPEDEF, specbits) + && !SIGNATURE_GROKKING_TYPEDEF (current_class_type)) + { + if (constp) + { + error ("`const' specified for signature member function `%s'", name); + constp = 0; + } + if (volatilep) + { + error ("`volatile' specified for signature member function `%s'", name); + volatilep = 0; + } + if (inlinep) + { + error ("`inline' specified for signature member function `%s'", name); + /* Later, we'll make signature member functions inline. */ + inlinep = 0; + } + if (friendp) + { + error ("`friend' declaration in signature definition"); + friendp = 0; + } + if (virtualp) + { + error ("`virtual' specified for signature member function `%s'", name); + /* Later, we'll make signature member functions virtual. */ + virtualp = 0; + } + } + + /* Warn about storage classes that are invalid for certain + kinds of declarations (parameters, typenames, etc.). */ + + if (nclasses > 1) + error ("multiple storage classes in declaration of `%s'", name); + else if (decl_context != NORMAL && nclasses > 0) + { + if (decl_context == PARM + && (RIDBIT_SETP (RID_REGISTER, specbits) + || RIDBIT_SETP (RID_AUTO, specbits))) + ; + else if (decl_context == FIELD + && RIDBIT_SETP (RID_TYPEDEF, specbits)) + { + /* Processing a typedef declaration nested within a class type + definition. */ + register tree scanner; + register tree previous_declspec; + tree loc_typedecl; + + if (initialized) + error ("typedef declaration includes an initializer"); + + /* To process a class-local typedef declaration, we descend down + the chain of declspecs looking for the `typedef' spec. When we + find it, we splice it out of the chain of declspecs, and then + recursively call `grokdeclarator' with the original declarator + and with the newly adjusted declspecs. This call should return + a FIELD_DECL node with the TREE_TYPE (and other parts) set + appropriately. We can then just change the TREE_CODE on that + from FIELD_DECL to TYPE_DECL and we're done. */ + + for (previous_declspec = NULL_TREE, scanner = declspecs; + scanner; + previous_declspec = scanner, scanner = TREE_CHAIN (scanner)) + { + if (TREE_VALUE (scanner) == ridpointers[(int) RID_TYPEDEF]) + break; + } + if (previous_declspec) + TREE_CHAIN (previous_declspec) = TREE_CHAIN (scanner); + else + declspecs = TREE_CHAIN (scanner); + + /* In the recursive call to grokdeclarator we need to know + whether we are working on a signature-local typedef. */ + if (IS_SIGNATURE (current_class_type)) + SIGNATURE_GROKKING_TYPEDEF (current_class_type) = 1; + + loc_typedecl = + grokdeclarator (declarator, declspecs, FIELD, 0, NULL_TREE); + + if (loc_typedecl != error_mark_node) + { + register int i = sizeof (struct lang_decl_flags) / sizeof (int); + register int *pi; + + TREE_SET_CODE (loc_typedecl, TYPE_DECL); + + pi = (int *) permalloc (sizeof (struct lang_decl_flags)); + while (i > 0) + pi[--i] = 0; + DECL_LANG_SPECIFIC (loc_typedecl) = (struct lang_decl *) pi; + } + + if (IS_SIGNATURE (current_class_type)) + { + SIGNATURE_GROKKING_TYPEDEF (current_class_type) = 0; + if (loc_typedecl != error_mark_node && opaque_typedef) + SIGNATURE_HAS_OPAQUE_TYPEDECLS (current_class_type) = 1; + } + + return loc_typedecl; + } + else if (decl_context == FIELD + && (! IS_SIGNATURE (current_class_type)) + /* C++ allows static class elements */ + && RIDBIT_SETP (RID_STATIC, specbits)) + /* C++ also allows inlines and signed and unsigned elements, + but in those cases we don't come in here. */ + ; + else + { + if (decl_context == FIELD) + { + tree tmp = TREE_OPERAND (declarator, 0); + register int op = IDENTIFIER_OPNAME_P (tmp); + error ("storage class specified for %s `%s'", + IS_SIGNATURE (current_class_type) + ? (op + ? "signature member operator" + : "signature member function") + : (op ? "member operator" : "structure field"), + op ? operator_name_string (tmp) : name); + } + else + error ((decl_context == PARM + ? "storage class specified for parameter `%s'" + : "storage class specified for typename"), name); + RIDBIT_RESET (RID_REGISTER, specbits); + RIDBIT_RESET (RID_AUTO, specbits); + RIDBIT_RESET (RID_EXTERN, specbits); + + if (decl_context == FIELD && IS_SIGNATURE (current_class_type)) + { + RIDBIT_RESET (RID_STATIC, specbits); + staticp = 0; + } + } + } + else if (RIDBIT_SETP (RID_EXTERN, specbits) && initialized && !funcdef_flag) + { + if (current_binding_level == global_binding_level) + { + /* It's common practice (and completely legal) to have a const + be initialized and declared extern. */ + if (! constp) + warning ("`%s' initialized and declared `extern'", name); + } + else + error ("`%s' has both `extern' and initializer", name); + } + else if (RIDBIT_SETP (RID_EXTERN, specbits) && funcdef_flag + && current_binding_level != global_binding_level) + error ("nested function `%s' declared `extern'", name); + else if (current_binding_level == global_binding_level) + { + if (RIDBIT_SETP (RID_AUTO, specbits)) + error ("top-level declaration of `%s' specifies `auto'", name); +#if 0 + if (RIDBIT_SETP (RID_REGISTER, specbits)) + error ("top-level declaration of `%s' specifies `register'", name); +#endif +#if 0 + /* I'm not sure under what circumstances we should turn + on the extern bit, and under what circumstances we should + warn if other bits are turned on. */ + if (decl_context == NORMAL + && RIDBIT_NOSETP (RID_EXTERN, specbits) + && ! root_lang_context_p ()) + { + RIDBIT_SET (RID_EXTERN, specbits); + } +#endif + } + + /* Now figure out the structure of the declarator proper. + Descend through it, creating more complex types, until we reach + the declared identifier (or NULL_TREE, in an absolute declarator). */ + + while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE) + { + /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]), + an INDIRECT_REF (for *...), + a CALL_EXPR (for ...(...)), + an identifier (for the name being declared) + or a null pointer (for the place in an absolute declarator + where the name was omitted). + For the last two cases, we have just exited the loop. + + For C++ it could also be + a SCOPE_REF (for class :: ...). In this case, we have converted + sensible names to types, and those are the values we use to + qualify the member name. + an ADDR_EXPR (for &...), + a BIT_NOT_EXPR (for destructors) + a TYPE_EXPR (for operator typenames) + + At this point, TYPE is the type of elements of an array, + or for a function to return, or for a pointer to point to. + After this sequence of ifs, TYPE is the type of the + array or function or pointer, and DECLARATOR has had its + outermost layer removed. */ + + if (TREE_CODE (type) == ERROR_MARK) + { + if (TREE_CODE (declarator) == SCOPE_REF) + declarator = TREE_OPERAND (declarator, 1); + else + declarator = TREE_OPERAND (declarator, 0); + continue; + } + if (quals != NULL_TREE + && (declarator == NULL_TREE + || TREE_CODE (declarator) != SCOPE_REF)) + { + if (ctype == NULL_TREE && TREE_CODE (type) == METHOD_TYPE) + ctype = TYPE_METHOD_BASETYPE (type); + if (ctype != NULL_TREE) + { +#if 0 /* not yet, should get fixed properly later */ + tree dummy = make_type_decl (NULL_TREE, type); +#else + tree dummy = build_decl (TYPE_DECL, NULL_TREE, type); +#endif + ctype = grok_method_quals (ctype, dummy, quals); + type = TREE_TYPE (dummy); + quals = NULL_TREE; + } + } + switch (TREE_CODE (declarator)) + { + case ARRAY_REF: + { + register tree itype = NULL_TREE; + register tree size = TREE_OPERAND (declarator, 1); + + declarator = TREE_OPERAND (declarator, 0); + + /* Check for some types that there cannot be arrays of. */ + + if (TYPE_MAIN_VARIANT (type) == void_type_node) + { + cp_error ("declaration of `%D' as array of voids", dname); + type = error_mark_node; + } + + if (TREE_CODE (type) == FUNCTION_TYPE) + { + cp_error ("declaration of `%D' as array of functions", dname); + type = error_mark_node; + } + + /* ARM $8.4.3: Since you can't have a pointer to a reference, + you can't have arrays of references. If we allowed them, + then we'd be saying x[i] is legal for an array x, but + then you'd have to ask: what does `*(x + i)' mean? */ + if (TREE_CODE (type) == REFERENCE_TYPE) + { + if (decl_context == TYPENAME) + cp_error ("cannot make arrays of references"); + else + cp_error ("declaration of `%D' as array of references", + dname); + type = error_mark_node; + } + + if (TREE_CODE (type) == OFFSET_TYPE) + { + cp_error ("declaration of `%D' as array of data members", + dname); + type = error_mark_node; + } + + if (TREE_CODE (type) == METHOD_TYPE) + { + cp_error ("declaration of `%D' as array of function members", + dname); + type = error_mark_node; + } + + if (size == error_mark_node) + type = error_mark_node; + + if (type == error_mark_node) + continue; + + if (size) + { + /* Must suspend_momentary here because the index + type may need to live until the end of the function. + For example, it is used in the declaration of a + variable which requires destructing at the end of + the function; then build_vec_delete will need this + value. */ + int yes = suspend_momentary (); + /* might be a cast */ + if (TREE_CODE (size) == NOP_EXPR + && TREE_TYPE (size) == TREE_TYPE (TREE_OPERAND (size, 0))) + size = TREE_OPERAND (size, 0); + + /* If this is a template parameter, it'll be constant, but + we don't know what the value is yet. */ + if (TREE_CODE (size) == TEMPLATE_CONST_PARM) + goto dont_grok_size; + + if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE + && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE) + { + cp_error ("size of array `%D' has non-integer type", + dname); + size = integer_one_node; + } + if (TREE_READONLY_DECL_P (size)) + size = decl_constant_value (size); + if (pedantic && integer_zerop (size)) + cp_pedwarn ("ANSI C++ forbids zero-size array `%D'", dname); + if (TREE_CONSTANT (size)) + { + constant_expression_warning (size); + if (INT_CST_LT (size, integer_zero_node)) + { + cp_error ("size of array `%D' is negative", dname); + size = integer_one_node; + } + itype = build_index_type (size_binop (MINUS_EXPR, size, + integer_one_node)); + } + else + { + if (pedantic) + cp_pedwarn ("ANSI C++ forbids variable-size array `%D'", dname); + dont_grok_size: + itype = + build_binary_op (MINUS_EXPR, size, integer_one_node, 1); + /* Make sure the array size remains visibly nonconstant + even if it is (eg) a const variable with known value. */ + size_varies = 1; + itype = variable_size (itype); + itype = build_index_type (itype); + } + resume_momentary (yes); + } + + /* Build the array type itself, then merge any constancy or + volatility into the target type. We must do it in this order + to ensure that the TYPE_MAIN_VARIANT field of the array type + is set correctly. */ + + type = build_cplus_array_type (type, itype); + if (constp || volatilep) + /* Should this be c_build_type_variant? -jason */ + type = build_type_variant (type, constp, volatilep); + + ctype = NULL_TREE; + } + break; + + case CALL_EXPR: + { + tree arg_types; + + /* Declaring a function type. + Make sure we have a valid type for the function to return. */ +#if 0 + /* Is this an error? Should they be merged into TYPE here? */ + if (pedantic && (constp || volatilep)) + pedwarn ("function declared to return const or volatile result"); +#else + /* Merge any constancy or volatility into the target type + for the pointer. */ + + if (constp || volatilep) + { + type = build_type_variant (type, constp, volatilep); + if (IS_AGGR_TYPE (type)) + build_pointer_type (type); + constp = 0; + volatilep = 0; + } +#endif + + /* Warn about some types functions can't return. */ + + if (TREE_CODE (type) == FUNCTION_TYPE) + { + error ("`%s' declared as function returning a function", name); + type = integer_type_node; + } + if (TREE_CODE (type) == ARRAY_TYPE) + { + error ("`%s' declared as function returning an array", name); + type = integer_type_node; + } + + if (ctype == NULL_TREE + && decl_context == FIELD + && (friendp == 0 || dname == current_class_name)) + ctype = current_class_type; + + if (ctype && flags == TYPENAME_FLAG) + TYPE_HAS_CONVERSION (ctype) = 1; + if (ctype && constructor_name (ctype) == dname) + { + /* We are within a class's scope. If our declarator name + is the same as the class name, and we are defining + a function, then it is a constructor/destructor, and + therefore returns a void type. */ + + if (flags == DTOR_FLAG) + { + /* ANSI C++ June 5 1992 WP 12.4.1. A destructor may + not be declared const or volatile. A destructor + may not be static. */ + if (staticp == 2) + error ("destructor cannot be static member function"); + if (TYPE_READONLY (type)) + { + error ("destructors cannot be declared `const'"); + return void_type_node; + } + if (TYPE_VOLATILE (type)) + { + error ("destructors cannot be declared `volatile'"); + return void_type_node; + } + if (decl_context == FIELD) + { + if (! member_function_or_else (ctype, current_class_type, + "destructor for alien class `%s' cannot be a member")) + return void_type_node; + } + } + else /* it's a constructor. */ + { + /* ANSI C++ June 5 1992 WP 12.1.2. A constructor may + not be declared const or volatile. A constructor may + not be virtual. A constructor may not be static. */ + if (staticp == 2) + error ("constructor cannot be static member function"); + if (virtualp) + { + pedwarn ("constructors cannot be declared virtual"); + virtualp = 0; + } + if (TYPE_READONLY (type)) + { + error ("constructors cannot be declared `const'"); + return void_type_node; + } + if (TYPE_VOLATILE (type)) + { + error ("constructors cannot be declared `volatile'"); + return void_type_node; + } + { + int inlinep, staticp; + inlinep = RIDBIT_SETP (RID_INLINE, specbits); + staticp = RIDBIT_SETP (RID_STATIC, specbits); + RIDBIT_RESET (RID_INLINE, specbits); + RIDBIT_RESET (RID_STATIC, specbits); + if (RIDBIT_ANY_SET (specbits)) + error ("return value type specifier for constructor ignored"); + if (inlinep) + RIDBIT_SET (RID_INLINE, specbits); + if (staticp) + RIDBIT_SET (RID_STATIC, specbits); + } + type = TYPE_POINTER_TO (ctype); + if (decl_context == FIELD && + IS_SIGNATURE (current_class_type)) + { + error ("constructor not allowed in signature"); + return void_type_node; + } + else if (decl_context == FIELD) + { + if (! member_function_or_else (ctype, current_class_type, + "constructor for alien class `%s' cannot be member")) + return void_type_node; + TYPE_HAS_CONSTRUCTOR (ctype) = 1; + if (return_type != return_ctor) + return NULL_TREE; + } + } + if (decl_context == FIELD) + staticp = 0; + } + else if (friendp && virtualp) + { + /* Cannot be both friend and virtual. */ + error ("virtual functions cannot be friends"); + RIDBIT_RESET (RID_FRIEND, specbits); + friendp = 0; + } + + if (decl_context == NORMAL && friendp) + error ("friend declaration not in class definition"); + + /* Pick up type qualifiers which should be applied to `this'. */ + quals = TREE_OPERAND (declarator, 2); + + /* Traditionally, declaring return type float means double. */ + + if (flag_traditional + && TYPE_MAIN_VARIANT (type) == float_type_node) + { + type = build_type_variant (double_type_node, + TYPE_READONLY (type), + TYPE_VOLATILE (type)); + } + + /* Construct the function type and go to the next + inner layer of declarator. */ + + { + int funcdef_p; + tree inner_parms = TREE_OPERAND (declarator, 1); + tree inner_decl = TREE_OPERAND (declarator, 0); + + declarator = TREE_OPERAND (declarator, 0); + + if (inner_decl && TREE_CODE (inner_decl) == SCOPE_REF) + inner_decl = TREE_OPERAND (inner_decl, 1); + + /* Say it's a definition only for the CALL_EXPR + closest to the identifier. */ + funcdef_p = + (inner_decl && + (TREE_CODE (inner_decl) == IDENTIFIER_NODE + || TREE_CODE (inner_decl) == TYPE_EXPR)) ? funcdef_flag : 0; + + /* FIXME: This is where default args should be fully + processed. */ + + arg_types = grokparms (inner_parms, funcdef_p); + } + + if (declarator) + { + /* Get past destructors, etc. + We know we have one because FLAGS will be non-zero. + + Complain about improper parameter lists here. */ + if (TREE_CODE (declarator) == BIT_NOT_EXPR) + { + declarator = TREE_OPERAND (declarator, 0); + + if (strict_prototype == 0 && arg_types == NULL_TREE) + arg_types = void_list_node; + else if (arg_types == NULL_TREE + || arg_types != void_list_node) + { + error ("destructors cannot be specified with parameters"); + arg_types = void_list_node; + } + } + } + + /* ANSI seems to say that `const int foo ();' + does not make the function foo const. */ + type = build_function_type (type, + flag_traditional ? 0 : arg_types); + } + break; + + case ADDR_EXPR: + case INDIRECT_REF: + /* Filter out pointers-to-references and references-to-references. + We can get these if a TYPE_DECL is used. */ + + if (TREE_CODE (type) == REFERENCE_TYPE) + { + error ("cannot declare %s to references", + TREE_CODE (declarator) == ADDR_EXPR + ? "references" : "pointers"); + declarator = TREE_OPERAND (declarator, 0); + continue; + } + + /* Merge any constancy or volatility into the target type + for the pointer. */ + + if (constp || volatilep) + { + /* A const or volatile signature pointer/reference is + pointing to a const or volatile object, i.e., the + `optr' is const or volatile, respectively, not the + signature pointer/reference itself. */ + if (! IS_SIGNATURE (type)) + { + type = build_type_variant (type, constp, volatilep); + if (IS_AGGR_TYPE (type)) + build_pointer_type (type); + constp = 0; + volatilep = 0; + } + } + + if (IS_SIGNATURE (type)) + { + if (TREE_CODE (declarator) == ADDR_EXPR) + { + if (CLASSTYPE_METHOD_VEC (type) == NULL_TREE) + warning ("empty signature `%s' used in signature reference declaration", + TYPE_NAME_STRING(type)); +#if 0 + type = build_signature_reference_type (type, + constp, volatilep); +#else + sorry ("signature reference"); + return NULL_TREE; +#endif + } + else + { + if (CLASSTYPE_METHOD_VEC (type) == NULL_TREE) + warning ("empty signature `%s' used in signature pointer declaration", + TYPE_NAME_STRING(type)); + type = build_signature_pointer_type (type, + constp, volatilep); + } + constp = 0; + volatilep = 0; + } + else if (TREE_CODE (declarator) == ADDR_EXPR) + { + if (TREE_CODE (type) == FUNCTION_TYPE) + { + error ("cannot declare references to functions; use pointer to function instead"); + type = build_pointer_type (type); + } + else + { + if (TYPE_MAIN_VARIANT (type) == void_type_node) + error ("invalid type: `void &'"); + else + type = build_reference_type (type); + } + } + else if (TREE_CODE (type) == METHOD_TYPE) + { + type = build_ptrmemfunc_type (build_pointer_type (type)); + } + else + type = build_pointer_type (type); + + /* Process a list of type modifier keywords (such as + const or volatile) that were given inside the `*' or `&'. */ + + if (TREE_TYPE (declarator)) + { + register tree typemodlist; + int erred = 0; + for (typemodlist = TREE_TYPE (declarator); typemodlist; + typemodlist = TREE_CHAIN (typemodlist)) + { + if (TREE_VALUE (typemodlist) == ridpointers[(int) RID_CONST]) + constp++; + else if (TREE_VALUE (typemodlist) == ridpointers[(int) RID_VOLATILE]) + volatilep++; + else if (!erred) + { + erred = 1; + error ("invalid type modifier within %s declarator", + TREE_CODE (declarator) == ADDR_EXPR + ? "reference" : "pointer"); + } + } + if (constp > 1) + warning ("duplicate `const'"); + if (volatilep > 1) + warning ("duplicate `volatile'"); + } + declarator = TREE_OPERAND (declarator, 0); + ctype = NULL_TREE; + break; + + case SCOPE_REF: + { + /* We have converted type names to NULL_TREE if the + name was bogus, or to a _TYPE node, if not. + + The variable CTYPE holds the type we will ultimately + resolve to. The code here just needs to build + up appropriate member types. */ + tree sname = TREE_OPERAND (declarator, 1); + /* Destructors can have their visibilities changed as well. */ + if (TREE_CODE (sname) == BIT_NOT_EXPR) + sname = TREE_OPERAND (sname, 0); + + if (TREE_COMPLEXITY (declarator) == 0) + /* This needs to be here, in case we are called + multiple times. */ ; + else if (friendp && (TREE_COMPLEXITY (declarator) < 2)) + /* don't fall out into global scope. Hides real bug? --eichin */ ; + else if (TREE_COMPLEXITY (declarator) == current_class_depth) + { + /* I'm not really sure what pushclass calls this popclass + corresponds to. One is in build_push_scope and that has + been changed to a push_nested_class call, that's why I + try to use pop_nested_class here instead. + -niklas@appli.se */ + pop_nested_class (1); + TREE_COMPLEXITY (declarator) = current_class_depth; + } + else + my_friendly_abort (16); + + if (TREE_OPERAND (declarator, 0) == NULL_TREE) + { + /* We had a reference to a global decl, or + perhaps we were given a non-aggregate typedef, + in which case we cleared this out, and should just + keep going as though it wasn't there. */ + declarator = sname; + continue; + } + ctype = TREE_OPERAND (declarator, 0); + + if (sname == NULL_TREE) + goto done_scoping; + + if (TREE_CODE (sname) == IDENTIFIER_NODE) + { + /* This is the `standard' use of the scoping operator: + basetype :: member . */ + + if (TREE_CODE (type) == FUNCTION_TYPE) + { + if (current_class_type == NULL_TREE + || TYPE_MAIN_VARIANT (ctype) == current_class_type + || friendp) + type = build_cplus_method_type (build_type_variant (ctype, constp, volatilep), + TREE_TYPE (type), TYPE_ARG_TYPES (type)); + else + { + error ("cannot declare member function `%s::%s' within this class", + TYPE_NAME_STRING (ctype), name); + return void_type_node; + } + } + else if (TYPE_MAIN_VARIANT (ctype) == current_class_type) + { + if (extra_warnings) + warning ("extra qualification `%s' on member `%s' ignored", + TYPE_NAME_STRING (ctype), name); + type = build_offset_type (ctype, type); + } + else if (TYPE_SIZE (ctype) != NULL_TREE + || (RIDBIT_SETP (RID_TYPEDEF, specbits))) + { + tree t; + /* have to move this code elsewhere in this function. + this code is used for i.e., typedef int A::M; M *pm; */ + + if (explicit_int == -1 && decl_context == FIELD + && funcdef_flag == 0) + { + /* The code in here should only be used to build + stuff that will be grokked as access decls. */ + t = lookup_field (ctype, sname, 0, 0); + if (t) + { + t = build_lang_field_decl (FIELD_DECL, build_nt (SCOPE_REF, ctype, t), type); + DECL_INITIAL (t) = init; + return t; + } + /* No such field, try member functions. */ + t = lookup_fnfields (TYPE_BINFO (ctype), sname, 0); + if (t) + { + if (flags == DTOR_FLAG) + t = TREE_VALUE (t); + else if (CLASSTYPE_METHOD_VEC (ctype) + && TREE_VALUE (t) == TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (ctype), 0)) + { + /* Don't include destructor with constructors. */ + t = DECL_CHAIN (TREE_VALUE (t)); + if (t == NULL_TREE) + error ("class `%s' does not have any constructors", IDENTIFIER_POINTER (sname)); + t = build_tree_list (NULL_TREE, t); + } + t = build_lang_field_decl (FIELD_DECL, build_nt (SCOPE_REF, ctype, t), type); + DECL_INITIAL (t) = init; + return t; + } + + if (flags == TYPENAME_FLAG) + cp_error ("type conversion is not a member of structure `%T'", ctype); + else + cp_error + ("field `%D' is not a member of structure `%T'", + sname, ctype); + } + + if (current_class_type) + { + if (TYPE_MAIN_VARIANT (ctype) != current_class_type) + { + cp_error ("cannot declare member `%T::%s' within `%T'", + ctype, name, current_class_type); + return void_type_node; + } + else if (extra_warnings) + cp_warning ("extra qualification `%T' on member `%s' ignored", + ctype, name); + } + type = build_offset_type (ctype, type); + } + else if (uses_template_parms (ctype)) + { + enum tree_code c; + if (TREE_CODE (type) == FUNCTION_TYPE) + { + type = build_cplus_method_type (build_type_variant (ctype, constp, volatilep), + TREE_TYPE (type), + TYPE_ARG_TYPES (type)); + c = FUNCTION_DECL; + } + } + else + { + cp_error ("structure `%T' not yet defined", ctype); + return error_mark_node; + } + + declarator = sname; + } + else if (TREE_CODE (sname) == TYPE_EXPR) + { + /* A TYPE_EXPR will change types out from under us. + So do the TYPE_EXPR now, and make this SCOPE_REF + inner to the TYPE_EXPR's CALL_EXPR. + + This does not work if we don't get a CALL_EXPR back. + I did not think about error recovery, hence the + my_friendly_abort. */ + + /* Get the CALL_EXPR. */ + sname = grokoptypename (sname, 0); + my_friendly_assert (TREE_CODE (sname) == CALL_EXPR, 157); + type = TREE_TYPE (TREE_OPERAND (sname, 0)); + /* Scope the CALL_EXPR's name. */ + TREE_OPERAND (declarator, 1) = TREE_OPERAND (sname, 0); + /* Put the SCOPE_EXPR in the CALL_EXPR's innermost position. */ + TREE_OPERAND (sname, 0) = declarator; + /* Now work from the CALL_EXPR. */ + declarator = sname; + continue; + } + else if (TREE_CODE (sname) == SCOPE_REF) + my_friendly_abort (17); + else + { + done_scoping: + declarator = TREE_OPERAND (declarator, 1); + if (declarator && TREE_CODE (declarator) == CALL_EXPR) + /* In this case, we will deal with it later. */ + ; + else + { + if (TREE_CODE (type) == FUNCTION_TYPE) + type = build_cplus_method_type (build_type_variant (ctype, constp, volatilep), TREE_TYPE (type), TYPE_ARG_TYPES (type)); + else + type = build_offset_type (ctype, type); + } + } + } + break; + + case BIT_NOT_EXPR: + declarator = TREE_OPERAND (declarator, 0); + break; + + case TYPE_EXPR: + declarator = grokoptypename (declarator, 0); + if (explicit_int != -1) + { + tree stype = TREE_TYPE (TREE_OPERAND (declarator, 0)); + if (comp_target_types (type, stype, 1) == 0) + cp_error ("`operator %T' declared to return `%T'", stype, + type); + else + cp_pedwarn ("return type specified for `operator %T'", type); + } + dname = declarator; + type = TREE_TYPE (TREE_OPERAND (declarator, 0)); + break; + + case RECORD_TYPE: + case UNION_TYPE: + case ENUMERAL_TYPE: + declarator = NULL_TREE; + break; + + case ERROR_MARK: + declarator = NULL_TREE; + break; + + default: + my_friendly_abort (158); + } + } + + /* Now TYPE has the actual type. */ + + /* If this is declaring a typedef name, return a TYPE_DECL. */ + + if (RIDBIT_SETP (RID_TYPEDEF, specbits)) + { + tree decl; + + /* Note that the grammar rejects storage classes + in typenames, fields or parameters. */ + if (constp || volatilep) + type = build_type_variant (type, constp, volatilep); + + /* If the user declares "struct {...} foo" then `foo' will have + an anonymous name. Fill that name in now. Nothing can + refer to it, so nothing needs know about the name change. + The TYPE_NAME field was filled in by build_struct_xref. */ + if (type != error_mark_node + && TYPE_NAME (type) + && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))) + { + /* replace the anonymous name with the real name everywhere. */ + lookup_tag_reverse (type, declarator); + TYPE_IDENTIFIER (type) = declarator; + + if (TYPE_LANG_SPECIFIC (type)) + TYPE_WAS_ANONYMOUS (type) = 1; + + { + tree d = TYPE_NAME (type), c = DECL_CONTEXT (d); + + if (!c) + set_nested_typename (d, 0, declarator, type); + else if (TREE_CODE (c) == FUNCTION_DECL) + set_nested_typename (d, DECL_ASSEMBLER_NAME (c), + declarator, type); + else + set_nested_typename (d, TYPE_NESTED_NAME (c), declarator, type); + } + } + +#if 0 /* not yet, should get fixed properly later */ + decl = make_type_decl (declarator, type); +#else + decl = build_decl (TYPE_DECL, declarator, type); +#endif + if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == METHOD_TYPE) + { + cp_error_at ("typedef name may not be class-qualified", decl); + TREE_TYPE (decl) = error_mark_node; + } + else if (quals) + { + if (ctype == NULL_TREE) + { + if (TREE_CODE (type) != METHOD_TYPE) + cp_error_at ("invalid type qualifier for non-method type", decl); + else + ctype = TYPE_METHOD_BASETYPE (type); + } + if (ctype != NULL_TREE) + grok_method_quals (ctype, decl, quals); + } + + if (RIDBIT_SETP (RID_SIGNED, specbits) + || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))) + C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1; + + if (RIDBIT_SETP (RID_MUTABLE, specbits)) + { + error ("non-object member `%s' cannot be declared mutable", name); + } + + return decl; + } + + /* Detect the case of an array type of unspecified size + which came, as such, direct from a typedef name. + We must copy the type, so that each identifier gets + a distinct type, so that each identifier's size can be + controlled separately by its own initializer. */ + + if (type == typedef_type && TREE_CODE (type) == ARRAY_TYPE + && TYPE_DOMAIN (type) == NULL_TREE) + { + type = build_cplus_array_type (TREE_TYPE (type), TYPE_DOMAIN (type)); + } + + /* If this is a type name (such as, in a cast or sizeof), + compute the type and return it now. */ + + if (decl_context == TYPENAME) + { + /* Note that the grammar rejects storage classes + in typenames, fields or parameters. */ + if (constp || volatilep) + if (IS_SIGNATURE (type)) + error ("`const' or `volatile' specified with signature type"); + else + type = build_type_variant (type, constp, volatilep); + + /* Special case: "friend class foo" looks like a TYPENAME context. */ + if (friendp) + { + /* A friendly class? */ + if (current_class_type) + make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type)); + else + error("trying to make class `%s' a friend of global scope", + TYPE_NAME_STRING (type)); + type = void_type_node; + } + else if (quals) + { +#if 0 /* not yet, should get fixed properly later */ + tree dummy = make_type_decl (declarator, type); +#else + tree dummy = build_decl (TYPE_DECL, declarator, type); +#endif + if (ctype == NULL_TREE) + { + my_friendly_assert (TREE_CODE (type) == METHOD_TYPE, 159); + ctype = TYPE_METHOD_BASETYPE (type); + } + grok_method_quals (ctype, dummy, quals); + type = TREE_TYPE (dummy); + } + + return type; + } + else if (declarator == NULL_TREE && decl_context != PARM + && TREE_CODE (type) != UNION_TYPE + && ! bitfield) + { + cp_error ("abstract declarator `%T' used as declaration", type); + declarator = make_anon_name (); + } + + /* `void' at top level (not within pointer) + is allowed only in typedefs or type names. + We don't complain about parms either, but that is because + a better error message can be made later. */ + + if (TYPE_MAIN_VARIANT (type) == void_type_node && decl_context != PARM) + { + if (TREE_CODE (declarator) == IDENTIFIER_NODE) + { + if (IDENTIFIER_OPNAME_P (declarator)) +#if 0 /* How could this happen? */ + error ("operator `%s' declared void", + operator_name_string (declarator)); +#else + my_friendly_abort (356); +#endif + else + error ("variable or field `%s' declared void", name); + } + else + error ("variable or field declared void"); + type = integer_type_node; + } + + /* Now create the decl, which may be a VAR_DECL, a PARM_DECL + or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */ + + { + register tree decl; + + if (decl_context == PARM) + { + tree parmtype = type; + + if (ctype) + error ("cannot use `::' in parameter declaration"); + + /* A parameter declared as an array of T is really a pointer to T. + One declared as a function is really a pointer to a function. + One declared as a member is really a pointer to member. + + Don't be misled by references. */ + + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + if (TREE_CODE (type) == ARRAY_TYPE) + { + if (parmtype == type) + { + /* Transfer const-ness of array into that of type + pointed to. */ + type = build_pointer_type + (build_type_variant (TREE_TYPE (type), constp, volatilep)); + volatilep = constp = 0; + } + else + type = build_pointer_type (TREE_TYPE (type)); + } + else if (TREE_CODE (type) == FUNCTION_TYPE) + type = build_pointer_type (type); + else if (TREE_CODE (type) == OFFSET_TYPE) + type = build_pointer_type (type); + + if (TREE_CODE (parmtype) == REFERENCE_TYPE) + { + /* Transfer const-ness of reference into that of type pointed to. */ + type = build_type_variant (build_reference_type (type), constp, volatilep); + constp = volatilep = 0; + } + + decl = build_decl (PARM_DECL, declarator, type); + + bad_specifiers (decl, "parameter", virtualp, quals != NULL_TREE, + inlinep, friendp, raises != NULL_TREE); + if (current_class_type + && IS_SIGNATURE (current_class_type)) + { + if (inlinep) + error ("parameter of signature member function declared `inline'"); + if (RIDBIT_SETP (RID_AUTO, specbits)) + error ("parameter of signature member function declared `auto'"); + if (RIDBIT_SETP (RID_REGISTER, specbits)) + error ("parameter of signature member function declared `register'"); + } + + /* Compute the type actually passed in the parmlist, + for the case where there is no prototype. + (For example, shorts and chars are passed as ints.) + When there is a prototype, this is overridden later. */ + + DECL_ARG_TYPE (decl) = type; + if (TYPE_MAIN_VARIANT (type) == float_type_node) + DECL_ARG_TYPE (decl) = build_type_variant (double_type_node, + TYPE_READONLY (type), + TYPE_VOLATILE (type)); + else if (C_PROMOTING_INTEGER_TYPE_P (type)) + { + tree argtype; + + /* Retain unsignedness if traditional or if not really + getting wider. */ + if (TREE_UNSIGNED (type) + && (flag_traditional + || TYPE_PRECISION (type) + == TYPE_PRECISION (integer_type_node))) + argtype = unsigned_type_node; + else + argtype = integer_type_node; + DECL_ARG_TYPE (decl) = build_type_variant (argtype, + TYPE_READONLY (type), + TYPE_VOLATILE (type)); + } + } + else if (decl_context == FIELD) + { + if (type == error_mark_node) + { + /* Happens when declaring arrays of sizes which + are error_mark_node, for example. */ + decl = NULL_TREE; + } + else if (TREE_CODE (type) == FUNCTION_TYPE) + { + int publicp = 0; + + if (friendp == 0) + { + if (ctype == NULL_TREE) + ctype = current_class_type; + + if (ctype == NULL_TREE) + { + cp_error ("can't make `%D' into a method -- not in a class", + declarator); + return void_type_node; + } + + /* ``A union may [ ... ] not [ have ] virtual functions.'' + ARM 9.5 */ + if (virtualp && TREE_CODE (ctype) == UNION_TYPE) + { + cp_error ("function `%D' declared virtual inside a union", + declarator); + return void_type_node; + } + + if (declarator == ansi_opname[(int) NEW_EXPR] + || declarator == ansi_opname[(int) DELETE_EXPR]) + { + if (virtualp) + { + cp_error ("`%D' cannot be declared virtual, since it is always static", + declarator); + virtualp = 0; + } + } + else if (staticp < 2) + type = build_cplus_method_type (build_type_variant (ctype, constp, volatilep), + TREE_TYPE (type), TYPE_ARG_TYPES (type)); + } + + /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */ + publicp = (RIDBIT_SETP (RID_EXTERN, specbits) + || (ctype != NULL_TREE && funcdef_flag >= 0) + || (friendp + && ! funcdef_flag + && RIDBIT_NOTSETP (RID_STATIC, specbits) + && RIDBIT_NOTSETP (RID_INLINE, specbits))); + decl = grokfndecl (ctype, type, declarator, + virtualp, flags, quals, + raises, friendp ? -1 : 0, publicp); + DECL_INLINE (decl) = inlinep; + } + else if (TREE_CODE (type) == METHOD_TYPE) + { + /* All method decls are public, so tell grokfndecl to set + TREE_PUBLIC, also. */ + decl = grokfndecl (ctype, type, declarator, + virtualp, flags, quals, + raises, friendp ? -1 : 0, 1); + DECL_INLINE (decl) = inlinep; + } + else if (TREE_CODE (type) == RECORD_TYPE + && CLASSTYPE_DECLARED_EXCEPTION (type)) + { + /* Handle a class-local exception declaration. */ + decl = build_lang_field_decl (VAR_DECL, declarator, type); + if (ctype == NULL_TREE) + ctype = current_class_type; + finish_exception_decl (TREE_CODE (TYPE_NAME (ctype)) == TYPE_DECL + ? TYPE_IDENTIFIER (ctype) : TYPE_NAME (ctype), decl); + return void_type_node; + } + else if (TYPE_SIZE (type) == NULL_TREE && !staticp + && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0)) + { + error ("field `%s' has incomplete type", + IDENTIFIER_POINTER (declarator)); + + /* If we're instantiating a template, tell them which + instantiation made the field's type be incomplete. */ + if (current_class_type + && TYPE_NAME (current_class_type) + && IDENTIFIER_TEMPLATE (DECL_NAME (TYPE_NAME (current_class_type))) + && declspecs && TREE_VALUE (declspecs) + && TREE_TYPE (TREE_VALUE (declspecs)) == type) + error (" in instantiation of template `%s'", + TYPE_NAME_STRING (current_class_type)); + + type = error_mark_node; + decl = NULL_TREE; + } + else + { + if (friendp) + { + error ("`%s' is neither function nor method; cannot be declared friend", + IDENTIFIER_POINTER (declarator)); + friendp = 0; + } + decl = NULL_TREE; + } + + if (friendp) + { + /* Friends are treated specially. */ + if (ctype == current_class_type) + warning ("member functions are implicitly friends of their class"); + else + { + tree t = NULL_TREE; + if (decl && DECL_NAME (decl)) + t = do_friend (ctype, declarator, decl, + last_function_parms, flags, quals); + if (t && funcdef_flag) + return t; + + return void_type_node; + } + } + + /* Structure field. It may not be a function, except for C++ */ + + if (decl == NULL_TREE) + { + /* ANSI C++ June 5 1992 WP 9.2.2 and 9.4.2. A member-declarator + cannot have an initializer, and a static member declaration must + be defined elsewhere. */ + if (initialized) + { + if (staticp) + error ("static member `%s' must be defined separately from its declaration", + IDENTIFIER_POINTER (declarator)); + /* Note that initialization of const members is prohibited + by the draft ANSI standard, though it appears to be in + common practice. 12.6.2: The argument list is used to + initialize the named nonstatic member.... This (or an + aggregate) is the only way to initialize nonstatic const + and reference members. */ + else + pedwarn ("ANSI C++ forbids initialization of %s `%s'", + constp ? "const member" : "member", + IDENTIFIER_POINTER (declarator)); + } + + if (staticp || (constp && initialized)) + { + /* C++ allows static class members. + All other work for this is done by grokfield. + This VAR_DECL is built by build_lang_field_decl. + All other VAR_DECLs are built by build_decl. */ + decl = build_lang_field_decl (VAR_DECL, declarator, type); + if (staticp || TREE_CODE (type) == ARRAY_TYPE) + TREE_STATIC (decl) = 1; + /* In class context, static means public access. */ + TREE_PUBLIC (decl) = 1; + DECL_EXTERNAL (decl) = !initialized; + } + else + { + decl = build_lang_field_decl (FIELD_DECL, declarator, type); + if (RIDBIT_SETP (RID_MUTABLE, specbits)) + { + DECL_MUTABLE_P (decl) = 1; + RIDBIT_RESET (RID_MUTABLE, specbits); + } + } + + bad_specifiers (decl, "field", virtualp, quals != NULL_TREE, + inlinep, friendp, raises != NULL_TREE); + } + } + else if (TREE_CODE (type) == FUNCTION_TYPE || TREE_CODE (type) == METHOD_TYPE) + { + int was_overloaded = 0; + tree original_name = declarator; + int publicp = 0; + + if (! declarator) + return NULL_TREE; + + if (RIDBIT_SETP (RID_AUTO, specbits) + || RIDBIT_SETP (RID_REGISTER, specbits)) + error ("invalid storage class for function `%s'", name); + + /* Function declaration not at top level. + Storage classes other than `extern' are not allowed + and `extern' makes no difference. */ + if (current_binding_level != global_binding_level + && (RIDBIT_SETP (RID_STATIC, specbits) || RIDBIT_SETP (RID_INLINE, specbits)) + && pedantic) + pedwarn ("invalid storage class for function `%s'", name); + + if (ctype == NULL_TREE) + { + if (virtualp) + { + error ("virtual non-class function `%s'", name); + virtualp = 0; + } + + if (current_lang_name == lang_name_cplusplus + && ! (IDENTIFIER_LENGTH (original_name) == 4 + && IDENTIFIER_POINTER (original_name)[0] == 'm' + && strcmp (IDENTIFIER_POINTER (original_name), "main") == 0) + && ! (IDENTIFIER_LENGTH (original_name) > 10 + && IDENTIFIER_POINTER (original_name)[0] == '_' + && IDENTIFIER_POINTER (original_name)[1] == '_' + && strncmp (IDENTIFIER_POINTER (original_name)+2, "builtin_", 8) == 0)) + { + /* Plain overloading: will not be grok'd by grokclassfn. */ + declarator = build_decl_overload (dname, TYPE_ARG_TYPES (type), 0); + was_overloaded = 1; + } + } + else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2) + type = build_cplus_method_type (build_type_variant (ctype, constp, volatilep), + TREE_TYPE (type), TYPE_ARG_TYPES (type)); + + /* Record presence of `static'. In C++, `inline' is like `static'. + Methods of classes should be public, unless we're dropping them + into some other file, so we don't clear TREE_PUBLIC for them. */ + publicp + = ((ctype + && CLASSTYPE_INTERFACE_KNOWN (ctype) + && ! CLASSTYPE_INTERFACE_ONLY (ctype)) + || !(RIDBIT_SETP (RID_STATIC, specbits) + || RIDBIT_SETP (RID_INLINE, specbits))); + + decl = grokfndecl (ctype, type, original_name, + virtualp, flags, quals, + raises, + processing_template_decl ? 0 : friendp ? 2 : 1, + publicp); + + if (ctype == NULL_TREE && DECL_LANGUAGE (decl) != lang_c) + DECL_ASSEMBLER_NAME (decl) = declarator; + + if (staticp == 1) + { + int illegal_static = 0; + + /* Don't allow a static member function in a class, and forbid + declaring main to be static. */ + if (TREE_CODE (type) == METHOD_TYPE) + { + cp_error_at ("cannot declare member function `%D' to have static linkage", decl); + illegal_static = 1; + } + else if (! was_overloaded + && ! ctype + && IDENTIFIER_LENGTH (original_name) == 4 + && IDENTIFIER_POINTER (original_name)[0] == 'm' + && ! strcmp (IDENTIFIER_POINTER (original_name), "main")) + { + error ("cannot declare function `main' to have static linkage"); + illegal_static = 1; + } + else if (current_function_decl) + { + /* FIXME need arm citation */ + error ("cannot declare static function inside another function"); + illegal_static = 1; + } + + if (illegal_static) + { + staticp = 0; + RIDBIT_RESET (RID_STATIC, specbits); + } + } + + /* Record presence of `inline', if it is reasonable. */ + if (inlinep) + { + tree last = tree_last (TYPE_ARG_TYPES (type)); + + if (! was_overloaded + && ! ctype + && ! strcmp (IDENTIFIER_POINTER (original_name), "main")) + error ("cannot inline function `main'"); + else if (last && last != void_list_node) + cp_warning ("cannot inline function `%D' which takes `...'", original_name); + else + /* Assume that otherwise the function can be inlined. */ + DECL_INLINE (decl) = 1; + + if (RIDBIT_SETP (RID_EXTERN, specbits)) + { + current_extern_inline = 1; + if (flag_ansi || pedantic || flag_pedantic_errors) + pedwarn ("ANSI C++ does not permit `extern inline'"); + } + } + if (was_overloaded) + DECL_OVERLOADED (decl) = 1; + } + else + { + /* It's a variable. */ + + /* An uninitialized decl with `extern' is a reference. */ + decl = grokvardecl (type, declarator, specbits, initialized); + bad_specifiers (decl, "variable", virtualp, quals != NULL_TREE, + inlinep, friendp, raises != NULL_TREE); + + if (ctype) + { + if (staticp == 1) + { + cp_error ("static member `%D' re-declared as static", + decl); + staticp = 0; + RIDBIT_RESET (RID_STATIC, specbits); + } + if (RIDBIT_SETP (RID_EXTERN, specbits)) + { + cp_error ("cannot explicitly declare member `%#D' to have extern linkage", + decl); + RIDBIT_RESET (RID_EXTERN, specbits); + } + } + } + + if (RIDBIT_SETP (RID_MUTABLE, specbits)) + { + error ("`%s' cannot be declared mutable", name); + } + + /* Record `register' declaration for warnings on & + and in case doing stupid register allocation. */ + + if (RIDBIT_SETP (RID_REGISTER, specbits)) + DECL_REGISTER (decl) = 1; + + /* Record constancy and volatility. */ + + if (constp) + TREE_READONLY (decl) = TREE_CODE (type) != REFERENCE_TYPE; + if (volatilep) + { + TREE_SIDE_EFFECTS (decl) = 1; + TREE_THIS_VOLATILE (decl) = 1; + } + + return decl; + } +} + +/* Tell if a parmlist/exprlist looks like an exprlist or a parmlist. + An empty exprlist is a parmlist. An exprlist which + contains only identifiers at the global level + is a parmlist. Otherwise, it is an exprlist. */ +int +parmlist_is_exprlist (exprs) + tree exprs; +{ + if (exprs == NULL_TREE || TREE_PARMLIST (exprs)) + return 0; + + if (current_binding_level == global_binding_level) + { + /* At the global level, if these are all identifiers, + then it is a parmlist. */ + while (exprs) + { + if (TREE_CODE (TREE_VALUE (exprs)) != IDENTIFIER_NODE) + return 1; + exprs = TREE_CHAIN (exprs); + } + return 0; + } + return 1; +} + +/* Subroutine of `grokparms'. In a fcn definition, arg types must + be complete. + + C++: also subroutine of `start_function'. */ +static void +require_complete_types_for_parms (parms) + tree parms; +{ + while (parms) + { + tree type = TREE_TYPE (parms); + if (TYPE_SIZE (type) == NULL_TREE) + { + if (DECL_NAME (parms)) + error ("parameter `%s' has incomplete type", + IDENTIFIER_POINTER (DECL_NAME (parms))); + else + error ("parameter has incomplete type"); + TREE_TYPE (parms) = error_mark_node; + } +#if 0 + /* If the arg types are incomplete in a declaration, + they must include undefined tags. + These tags can never be defined in the scope of the declaration, + so the types can never be completed, + and no call can be compiled successfully. */ + /* This is not the right behavior for C++, but not having + it is also probably wrong. */ + else + { + /* Now warn if is a pointer to an incomplete type. */ + while (TREE_CODE (type) == POINTER_TYPE + || TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + type = TYPE_MAIN_VARIANT (type); + if (TYPE_SIZE (type) == NULL_TREE) + { + if (DECL_NAME (parm) != NULL_TREE) + warning ("parameter `%s' points to incomplete type", + IDENTIFIER_POINTER (DECL_NAME (parm))); + else + warning ("parameter points to incomplete type"); + } + } +#endif + parms = TREE_CHAIN (parms); + } +} + +/* Decode the list of parameter types for a function type. + Given the list of things declared inside the parens, + return a list of types. + + The list we receive can have three kinds of elements: + an IDENTIFIER_NODE for names given without types, + a TREE_LIST node for arguments given as typespecs or names with typespecs, + or void_type_node, to mark the end of an argument list + when additional arguments are not permitted (... was not used). + + FUNCDEF_FLAG is nonzero for a function definition, 0 for + a mere declaration. A nonempty identifier-list gets an error message + when FUNCDEF_FLAG is zero. + If FUNCDEF_FLAG is 1, then parameter types must be complete. + If FUNCDEF_FLAG is -1, then parameter types may be incomplete. + + If all elements of the input list contain types, + we return a list of the types. + If all elements contain no type (except perhaps a void_type_node + at the end), we return a null list. + If some have types and some do not, it is an error, and we + return a null list. + + Also set last_function_parms to either + a list of names (IDENTIFIER_NODEs) or a chain of PARM_DECLs. + A list of names is converted to a chain of PARM_DECLs + by store_parm_decls so that ultimately it is always a chain of decls. + + Note that in C++, parameters can take default values. These default + values are in the TREE_PURPOSE field of the TREE_LIST. It is + an error to specify default values which are followed by parameters + that have no default values, or an ELLIPSES. For simplicities sake, + only parameters which are specified with their types can take on + default values. */ + +static tree +grokparms (first_parm, funcdef_flag) + tree first_parm; + int funcdef_flag; +{ + tree result = NULL_TREE; + tree decls = NULL_TREE; + + if (first_parm != NULL_TREE + && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE) + { + if (! funcdef_flag) + pedwarn ("parameter names (without types) in function declaration"); + last_function_parms = first_parm; + return NULL_TREE; + } + else if (first_parm != NULL_TREE + && TREE_CODE (TREE_VALUE (first_parm)) != TREE_LIST + && TREE_VALUE (first_parm) != void_type_node) + my_friendly_abort (145); + else + { + /* Types were specified. This is a list of declarators + each represented as a TREE_LIST node. */ + register tree parm, chain; + int any_init = 0, any_error = 0, saw_void = 0; + + if (first_parm != NULL_TREE) + { + tree last_result = NULL_TREE; + tree last_decl = NULL_TREE; + + for (parm = first_parm; parm != NULL_TREE; parm = chain) + { + tree type, list_node = parm; + register tree decl = TREE_VALUE (parm); + tree init = TREE_PURPOSE (parm); + + chain = TREE_CHAIN (parm); + /* @@ weak defense against parse errors. */ + if (decl != void_type_node && TREE_CODE (decl) != TREE_LIST) + { + /* Give various messages as the need arises. */ + if (TREE_CODE (decl) == STRING_CST) + error ("invalid string constant `%s'", + TREE_STRING_POINTER (decl)); + else if (TREE_CODE (decl) == INTEGER_CST) + error ("invalid integer constant in parameter list, did you forget to give parameter name?"); + continue; + } + + if (decl != void_type_node) + { + /* @@ May need to fetch out a `raises' here. */ + decl = grokdeclarator (TREE_VALUE (decl), + TREE_PURPOSE (decl), + PARM, init != NULL_TREE, NULL_TREE); + if (! decl) + continue; + type = TREE_TYPE (decl); + if (TYPE_MAIN_VARIANT (type) == void_type_node) + decl = void_type_node; + else if (TREE_CODE (type) == METHOD_TYPE) + { + if (DECL_NAME (decl)) + /* Cannot use `error_with_decl' here because + we don't have DECL_CONTEXT set up yet. */ + error ("parameter `%s' invalidly declared method type", + IDENTIFIER_POINTER (DECL_NAME (decl))); + else + error ("parameter invalidly declared method type"); + type = build_pointer_type (type); + TREE_TYPE (decl) = type; + } + else if (TREE_CODE (type) == OFFSET_TYPE) + { + if (DECL_NAME (decl)) + error ("parameter `%s' invalidly declared offset type", + IDENTIFIER_POINTER (DECL_NAME (decl))); + else + error ("parameter invalidly declared offset type"); + type = build_pointer_type (type); + TREE_TYPE (decl) = type; + } + else if (TREE_CODE (type) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (type) + && CLASSTYPE_ABSTRACT_VIRTUALS (type)) + { + abstract_virtuals_error (decl, type); + any_error = 1; /* seems like a good idea */ + } + else if (TREE_CODE (type) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (type) + && IS_SIGNATURE (type)) + { + signature_error (decl, type); + any_error = 1; /* seems like a good idea */ + } + } + + if (decl == void_type_node) + { + if (result == NULL_TREE) + { + result = void_list_node; + last_result = result; + } + else + { + TREE_CHAIN (last_result) = void_list_node; + last_result = void_list_node; + } + saw_void = 1; + if (chain + && (chain != void_list_node || TREE_CHAIN (chain))) + error ("`void' in parameter list must be entire list"); + break; + } + + /* Since there is a prototype, args are passed in their own types. */ + DECL_ARG_TYPE (decl) = TREE_TYPE (decl); +#ifdef PROMOTE_PROTOTYPES + if ((TREE_CODE (type) == INTEGER_TYPE + || TREE_CODE (type) == ENUMERAL_TYPE) + && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) + DECL_ARG_TYPE (decl) = integer_type_node; +#endif + if (!any_error) + { + if (init) + { + any_init++; + if (TREE_CODE (init) == SAVE_EXPR) + PARM_DECL_EXPR (init) = 1; + else if (TREE_CODE (init) == VAR_DECL) + { + if (IDENTIFIER_LOCAL_VALUE (DECL_NAME (init))) + { + /* ``Local variables may not be used in default + argument expressions.'' dpANSI C++ 8.2.6 */ + /* If extern int i; within a function is not + considered a local variable, then this code is + wrong. */ + cp_error ("local variable `%D' may not be used as a default argument", init); + any_error = 1; + } + else if (TREE_READONLY_DECL_P (init)) + init = decl_constant_value (init); + } + else + init = require_instantiated_type (type, init, integer_zero_node); + } + else if (any_init) + { + error ("all trailing parameters must have default arguments"); + any_error = 1; + } + } + else + init = NULL_TREE; + + if (decls == NULL_TREE) + { + decls = decl; + last_decl = decls; + } + else + { + TREE_CHAIN (last_decl) = decl; + last_decl = decl; + } + if (TREE_PERMANENT (list_node)) + { + TREE_PURPOSE (list_node) = init; + TREE_VALUE (list_node) = type; + TREE_CHAIN (list_node) = NULL_TREE; + } + else + list_node = saveable_tree_cons (init, type, NULL_TREE); + if (result == NULL_TREE) + { + result = list_node; + last_result = result; + } + else + { + TREE_CHAIN (last_result) = list_node; + last_result = list_node; + } + } + if (last_result) + TREE_CHAIN (last_result) = NULL_TREE; + /* If there are no parameters, and the function does not end + with `...', then last_decl will be NULL_TREE. */ + if (last_decl != NULL_TREE) + TREE_CHAIN (last_decl) = NULL_TREE; + } + } + + last_function_parms = decls; + + /* In a fcn definition, arg types must be complete. */ + if (funcdef_flag > 0) + require_complete_types_for_parms (last_function_parms); + + return result; +} + +/* These memoizing functions keep track of special properties which + a class may have. `grok_ctor_properties' notices whether a class + has a constructor of the form X(X&), and also complains + if the class has a constructor of the form X(X). + `grok_op_properties' takes notice of the various forms of + operator= which are defined, as well as what sorts of type conversion + may apply. Both functions take a FUNCTION_DECL as an argument. */ +void +grok_ctor_properties (ctype, decl) + tree ctype, decl; +{ + tree parmtypes = FUNCTION_ARG_CHAIN (decl); + tree parmtype = parmtypes ? TREE_VALUE (parmtypes) : void_type_node; + + /* When a type has virtual baseclasses, a magical first int argument is + added to any ctor so we can tell if the class has been initialized + yet. This could screw things up in this function, so we deliberately + ignore the leading int if we're in that situation. */ + if (parmtypes + && TREE_VALUE (parmtypes) == integer_type_node + && TYPE_USES_VIRTUAL_BASECLASSES (ctype)) + { + parmtypes = TREE_CHAIN (parmtypes); + parmtype = TREE_VALUE (parmtypes); + } + + if (TREE_CODE (parmtype) == REFERENCE_TYPE + && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) == ctype) + { + if (TREE_CHAIN (parmtypes) == NULL_TREE + || TREE_CHAIN (parmtypes) == void_list_node + || TREE_PURPOSE (TREE_CHAIN (parmtypes))) + { + TYPE_HAS_INIT_REF (ctype) = 1; + if (TYPE_READONLY (TREE_TYPE (parmtype))) + TYPE_HAS_CONST_INIT_REF (ctype) = 1; + } + else + TYPE_GETS_INIT_AGGR (ctype) = 1; + } + else if (TYPE_MAIN_VARIANT (parmtype) == ctype) + { + if (TREE_CHAIN (parmtypes) != NULL_TREE + && TREE_CHAIN (parmtypes) == void_list_node) + cp_error ("invalid constructor; you probably meant `%T (%T&)'", + ctype, ctype); + SET_IDENTIFIER_ERROR_LOCUS (DECL_NAME (decl), ctype); + TYPE_GETS_INIT_AGGR (ctype) = 1; + } + else if (TREE_CODE (parmtype) == VOID_TYPE + || TREE_PURPOSE (parmtypes) != NULL_TREE) + TYPE_HAS_DEFAULT_CONSTRUCTOR (ctype) = 1; +} + +/* An operator with this name can be either unary or binary. */ +int ambi_op_p (name) + tree name; +{ + return (name == ansi_opname [(int) INDIRECT_REF] + || name == ansi_opname [(int) ADDR_EXPR] + || name == ansi_opname [(int) NEGATE_EXPR] + || name == ansi_opname[(int) POSTINCREMENT_EXPR] + || name == ansi_opname[(int) POSTDECREMENT_EXPR] + || name == ansi_opname [(int) CONVERT_EXPR]); +} + +/* An operator with this name can only be unary. */ +int unary_op_p (name) + tree name; +{ + return (name == ansi_opname [(int) TRUTH_NOT_EXPR] + || name == ansi_opname [(int) BIT_NOT_EXPR] + || name == ansi_opname [(int) COMPONENT_REF] + || OPERATOR_TYPENAME_P (name)); +} + +/* Do a little sanity-checking on how they declared their operator. */ +static void +grok_op_properties (decl, virtualp, friendp) + tree decl; + int virtualp, friendp; +{ + tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl)); + int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE); + tree name = DECL_NAME (decl); + tree t; + + if (! friendp) + for (t = current_class_type; t; t = TYPE_NEXT_VARIANT (t)) + { + if (name == ansi_opname[(int) MODIFY_EXPR]) + TYPE_HAS_ASSIGNMENT (t) = 1; + else if (name == ansi_opname[(int) CALL_EXPR]) + TYPE_OVERLOADS_CALL_EXPR (t) = 1; + else if (name == ansi_opname[(int) ARRAY_REF]) + TYPE_OVERLOADS_ARRAY_REF (t) = 1; + else if (name == ansi_opname[(int) COMPONENT_REF] + || name == ansi_opname[(int) MEMBER_REF]) + TYPE_OVERLOADS_ARROW (t) = 1; + else if (name == ansi_opname[(int) NEW_EXPR]) + { + if (TREE_CHAIN (argtypes) == void_list_node) + TREE_GETS_NEW (t) = 1; + else + TREE_GETS_PLACED_NEW (t) = 1; + } + else if (name == ansi_opname[(int) DELETE_EXPR]) + TREE_GETS_DELETE (t) = 1; +#if 0 + else if (name == ansi_opname[(int) VEC_NEW_EXPR]) + TREE_GETS_NEW (t) = 1; + else if (name == ansi_opname[(int) VEC_DELETE_EXPR]) + TREE_GETS_DELETE (t) = 1; +#endif + } + + if (name == ansi_opname[(int) NEW_EXPR]) + { +#if 0 + /* When the compiler encounters the definition of A::operator new, it + doesn't look at the class declaration to find out if it's static. */ + my_friendly_assert (!methodp, 355); +#endif + + /* Take care of function decl if we had syntax errors. */ + if (argtypes == NULL_TREE) + TREE_TYPE (decl) = + build_function_type (ptr_type_node, + hash_tree_chain (integer_type_node, + void_list_node)); + else + decl = coerce_new_type (TREE_TYPE (decl)); + } +#if 0 + else if (name == ansi_opname[(int) VEC_NEW_EXPR]) + { + } +#endif + else if (name == ansi_opname[(int) DELETE_EXPR]) + { +#if 0 + my_friendly_assert (!methodp, 355); +#endif + + if (argtypes == NULL_TREE) + TREE_TYPE (decl) = + build_function_type (void_type_node, + hash_tree_chain (ptr_type_node, + void_list_node)); + else + decl = coerce_delete_type (TREE_TYPE (decl)); + } +#if 0 + else if (name == ansi_opname[(int) VEC_DELETE_EXPR]) + { + } +#endif + else + { + /* An operator function must either be a non-static member function + or have at least one parameter of a class, a reference to a class, + an enumeration, or a reference to an enumeration. 13.4.0.6 */ + if (! methodp) + { + if (OPERATOR_TYPENAME_P (name) + || name == ansi_opname[(int) CALL_EXPR] + || name == ansi_opname[(int) MODIFY_EXPR] + || name == ansi_opname[(int) COMPONENT_REF] + || name == ansi_opname[(int) ARRAY_REF]) + cp_error ("`%D' must be a nonstatic member function", decl); + else + { + tree p = argtypes; + + if (p) + for (; TREE_VALUE (p) != void_type_node ; p = TREE_CHAIN (p)) + { + tree arg = TREE_VALUE (p); + if (TREE_CODE (arg) == REFERENCE_TYPE) + arg = TREE_TYPE (arg); + + /* This lets bad template code slip through. */ + if (IS_AGGR_TYPE (arg) + || TREE_CODE (arg) == ENUMERAL_TYPE + || TREE_CODE (arg) == TEMPLATE_TYPE_PARM) + goto foundaggr; + } + cp_error + ("`%D' must have an argument of class or enumerated type", + decl); + foundaggr: + ; + } + } + + if (name == ansi_opname[(int) CALL_EXPR] + || name == ansi_opname[(int) METHOD_CALL_EXPR]) + return; /* no restrictions on args */ + + if (name == ansi_opname[(int) MODIFY_EXPR]) + { + tree parmtype; + + if (list_length (argtypes) != 3 && methodp) + { + cp_error ("`%D' must take exactly one argument", decl); + return; + } + parmtype = TREE_VALUE (TREE_CHAIN (argtypes)); + + if (TREE_CODE (parmtype) == REFERENCE_TYPE + && TYPE_MAIN_VARIANT (TREE_TYPE (parmtype)) + == current_class_type) + { + TYPE_HAS_ASSIGN_REF (current_class_type) = 1; + if (TYPE_READONLY (TREE_TYPE (parmtype))) + TYPE_HAS_CONST_ASSIGN_REF (current_class_type) = 1; + } + } + else if (name == ansi_opname[(int) COND_EXPR]) + { + /* 13.4.0.3 */ + pedwarn ("ANSI C++ prohibits overloading operator ?:"); + if (list_length (argtypes) != 4) + cp_error ("`%D' must take exactly three arguments", decl); + } + else if (ambi_op_p (name)) + { + if (list_length (argtypes) == 2) + /* prefix */; + else if (list_length (argtypes) == 3) + { + if ((name == ansi_opname[(int) POSTINCREMENT_EXPR] + || name == ansi_opname[(int) POSTDECREMENT_EXPR]) + && TREE_VALUE (TREE_CHAIN (argtypes)) != integer_type_node) + { + if (methodp) + cp_error ("postfix `%D' must take `int' as its argument", + decl); + else + cp_error + ("postfix `%D' must take `int' as its second argument", + decl); + } + } + else + { + if (methodp) + cp_error ("`%D' must take either zero or one argument", decl); + else + cp_error ("`%D' must take either one or two arguments", decl); + } + } + else if (unary_op_p (name)) + { + if (list_length (argtypes) != 2) + { + if (methodp) + cp_error ("`%D' must take `void'", decl); + else + cp_error ("`%D' must take exactly one argument", decl); + } + } + else /* if (binary_op_p (name)) */ + { + if (list_length (argtypes) != 3) + { + if (methodp) + cp_error ("`%D' must take exactly one argument", decl); + else + cp_error ("`%D' must take exactly two arguments", decl); + } + } + + /* 13.4.0.8 */ + if (argtypes) + for (; argtypes != void_list_node ; argtypes = TREE_CHAIN (argtypes)) + if (TREE_PURPOSE (argtypes)) + { + TREE_PURPOSE (argtypes) = NULL_TREE; + if (name == ansi_opname[(int) POSTINCREMENT_EXPR] + || name == ansi_opname[(int) POSTDECREMENT_EXPR]) + { + if (pedantic) + cp_pedwarn ("`%D' cannot have default arguments", decl); + } + else + cp_error ("`%D' cannot have default arguments", decl); + } + } +} + +/* Get the struct, enum or union (CODE says which) with tag NAME. + Define the tag as a forward-reference if it is not defined. + + C++: If a class derivation is given, process it here, and report + an error if multiple derivation declarations are not identical. + + If this is a definition, come in through xref_tag and only look in + the current frame for the name (since C++ allows new names in any + scope.) */ + +/* avoid rewriting all callers of xref_tag */ +static int xref_next_defn = 0; + +tree +xref_defn_tag (code_type_node, name, binfo) + tree code_type_node; + tree name, binfo; +{ + tree rv, ncp; + xref_next_defn = 1; + + if (class_binding_level) + { + tree n1; + char *buf; + /* we need to build a new IDENTIFIER_NODE for name which nukes + * the pieces... */ +/* + n1 = IDENTIFIER_LOCAL_VALUE (current_class_name); + if (n1) + n1 = DECL_NAME (n1); + else + n1 = current_class_name; +*/ + n1 = TYPE_NAME(current_class_type); + if (n1) + n1 = DECL_NESTED_TYPENAME(n1); + else + n1 = current_class_name; + + buf = (char *) alloca (4 + IDENTIFIER_LENGTH (n1) + + IDENTIFIER_LENGTH (name)); + + sprintf (buf, "%s::%s", IDENTIFIER_POINTER (n1), + IDENTIFIER_POINTER (name)); + ncp = get_identifier (buf); +#ifdef SPEW_DEBUG + if (spew_debug) + printf("*** %s ***\n", IDENTIFIER_POINTER (ncp)); +#endif +#if 0 + IDENTIFIER_LOCAL_VALUE (name) = + build_lang_decl (TYPE_DECL, ncp, NULL_TREE); +#endif + rv = xref_tag (code_type_node, name, binfo, 0); + if (! ANON_AGGRNAME_P (name)) + { + register tree type_decl = build_lang_decl (TYPE_DECL, ncp, rv); +#ifdef DWARF_DEBUGGING_INFO + /* Mark the TYPE_DECL node created just above as a gratuitous one + so that dwarfout.c will know not to generate a TAG_typedef DIE + for it. */ + if (write_symbols == DWARF_DEBUG) + DECL_IGNORED_P (type_decl) = 1; +#endif /* DWARF_DEBUGGING_INFO */ + pushdecl_top_level (type_decl); + } + } + else + { + rv = xref_tag (code_type_node, name, binfo, 0); + } + xref_next_defn = 0; + return rv; +} + +tree +xref_tag (code_type_node, name, binfo, globalize) + tree code_type_node; + tree name, binfo; + int globalize; +{ + enum tag_types tag_code; + enum tree_code code; + int temp = 0; + int i, len; + register tree ref, t; + struct binding_level *b = inner_binding_level; + + tag_code = (enum tag_types) TREE_INT_CST_LOW (code_type_node); + switch (tag_code) + { + case record_type: + case class_type: + case exception_type: + case signature_type: + code = RECORD_TYPE; + len = list_length (binfo); + break; + case union_type: + code = UNION_TYPE; + if (binfo) + { + cp_error ("derived union `%T' invalid", name); + binfo = NULL_TREE; + } + len = 0; + break; + case enum_type: + code = ENUMERAL_TYPE; + break; + default: + my_friendly_abort (18); + } + + /* If a cross reference is requested, look up the type + already defined for this tag and return it. */ + if (t = IDENTIFIER_TYPE_VALUE(name)) + { + if (TREE_CODE(t) != code) t = NULL_TREE; + } + if (xref_next_defn) + { + /* If we know we are defining this tag, only look it up in this scope + * and don't try to find it as a type. */ + xref_next_defn = 0; + if (t && TYPE_CONTEXT(t) && strstr(IDENTIFIER_POINTER(name), "::")) + ref = t; + else + ref = lookup_tag (code, name, b, 1); + } + else + { + if (t) + ref = t; + else + ref = lookup_tag (code, name, b, 0); + + if (! ref) + { + /* Try finding it as a type declaration. If that wins, use it. */ + ref = lookup_name (name, 1); + if (ref && TREE_CODE (ref) == TYPE_DECL + && TREE_CODE (TREE_TYPE (ref)) == code) + ref = TREE_TYPE (ref); + else + ref = NULL_TREE; + } + } + + push_obstacks_nochange (); + + if (! ref) + { + /* If no such tag is yet defined, create a forward-reference node + and record it as the "definition". + When a real declaration of this type is found, + the forward-reference will be altered into a real type. */ + + /* In C++, since these migrate into the global scope, we must + build them on the permanent obstack. */ + + temp = allocation_temporary_p (); + if (temp) + end_temporary_allocation (); + + if (code == ENUMERAL_TYPE) + { + ref = make_node (ENUMERAL_TYPE); + + /* Give the type a default layout like unsigned int + to avoid crashing if it does not get defined. */ + TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node); + TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node); + TREE_UNSIGNED (ref) = 1; + TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node); + TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node); + TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node); + + /* Enable us to recognize when a type is created in class context. + To do nested classes correctly, this should probably be cleared + out when we leave this classes scope. Currently this in only + done in `start_enum'. */ + + pushtag (name, ref, globalize); + if (flag_cadillac) + cadillac_start_enum (ref); + } + else if (tag_code == exception_type) + { + ref = make_lang_type (code); + /* Enable us to recognize when an exception type is created in + class context. To do nested classes correctly, this should + probably be cleared out when we leave this class's scope. */ + CLASSTYPE_DECLARED_EXCEPTION (ref) = 1; + pushtag (name, ref, globalize); + if (flag_cadillac) + cadillac_start_struct (ref); + } + else + { + extern tree pending_vtables; + struct binding_level *old_b = class_binding_level; + int needs_writing; + + ref = make_lang_type (code); + + /* A signature type will contain the fields of the signature + table. Therefore, it's not only an interface. */ + if (tag_code == signature_type) + { + SET_SIGNATURE (ref); + CLASSTYPE_INTERFACE_ONLY (ref) = 0; + CLASSTYPE_INTERFACE_UNKNOWN (ref) = 0; + } + + /* Record how to set the access of this class's + virtual functions. If write_virtuals == 2 or 3, then + inline virtuals are ``extern inline''. */ + switch (write_virtuals) + { + case 0: + case 1: + needs_writing = 1; + break; + case 2: + needs_writing = !! value_member (name, pending_vtables); + break; + case 3: + needs_writing = ! CLASSTYPE_INTERFACE_ONLY (ref) + && CLASSTYPE_INTERFACE_KNOWN (ref); + break; + default: + needs_writing = 0; + } + + /* Signatures don't have a vtable. As long as we don't have default + implementations, they behave as if `write_virtuals' were 3. */ + if (tag_code == signature_type) + CLASSTYPE_VTABLE_NEEDS_WRITING (ref) = 0; + else + CLASSTYPE_VTABLE_NEEDS_WRITING (ref) = needs_writing; + +#ifdef NONNESTED_CLASSES + /* Class types don't nest the way enums do. */ + class_binding_level = (struct binding_level *)0; +#endif + pushtag (name, ref, globalize); + class_binding_level = old_b; + + if (flag_cadillac) + cadillac_start_struct (ref); + } + } + else + { + if (IS_AGGR_TYPE_CODE (code)) + { + if (IS_AGGR_TYPE (ref) + && ((tag_code == exception_type) + != (CLASSTYPE_DECLARED_EXCEPTION (ref) == 1))) + { + cp_error ("type `%T' is both exception and aggregate type", ref); + CLASSTYPE_DECLARED_EXCEPTION (ref) = (tag_code == exception_type); + } + } + + /* If it no longer looks like a nested type, make sure it's + in global scope. */ + if (b == global_binding_level && !class_binding_level + && IDENTIFIER_GLOBAL_VALUE (name) == NULL_TREE) + IDENTIFIER_GLOBAL_VALUE (name) = TYPE_NAME (ref); + + if (binfo) + { + tree tt1 = binfo; + tree tt2 = TYPE_BINFO_BASETYPES (ref); + + if (TYPE_BINFO_BASETYPES (ref)) + for (i = 0; tt1; i++, tt1 = TREE_CHAIN (tt1)) + if (TREE_VALUE (tt1) != TYPE_IDENTIFIER (BINFO_TYPE (TREE_VEC_ELT (tt2, i)))) + { + cp_error ("redeclaration of derivation chain of type `%#T'", + ref); + break; + } + + if (tt1 == NULL_TREE) + /* The user told us something we already knew. */ + goto just_return; + + /* In C++, since these migrate into the global scope, we must + build them on the permanent obstack. */ + end_temporary_allocation (); + } + } + + if (binfo) + { + /* In the declaration `A : X, Y, ... Z' we mark all the types + (A, X, Y, ..., Z) so we can check for duplicates. */ + tree binfos; + + SET_CLASSTYPE_MARKED (ref); + BINFO_BASETYPES (TYPE_BINFO (ref)) = binfos = make_tree_vec (len); + + for (i = 0; binfo; binfo = TREE_CHAIN (binfo)) + { + /* The base of a derived struct is public by default. */ + int via_public + = (TREE_PURPOSE (binfo) == (tree)access_public + || TREE_PURPOSE (binfo) == (tree)access_public_virtual + || (tag_code != class_type + && (TREE_PURPOSE (binfo) == (tree)access_default + || TREE_PURPOSE (binfo) == (tree)access_default_virtual))); + int via_protected = TREE_PURPOSE (binfo) == (tree)access_protected; + int via_virtual + = (TREE_PURPOSE (binfo) == (tree)access_private_virtual + || TREE_PURPOSE (binfo) == (tree)access_public_virtual + || TREE_PURPOSE (binfo) == (tree)access_default_virtual); + tree basetype = TREE_TYPE (TREE_VALUE (binfo)); + tree base_binfo; + + GNU_xref_hier (IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (TREE_VALUE (binfo)), + via_public, via_virtual, 0); + + if (basetype && TREE_CODE (basetype) == TYPE_DECL) + basetype = TREE_TYPE (basetype); + if (!basetype || TREE_CODE (basetype) != RECORD_TYPE) + { + error ("base type `%s' fails to be a struct or class type", + IDENTIFIER_POINTER (TREE_VALUE (binfo))); + continue; + } +#if 1 + /* This code replaces similar code in layout_basetypes. */ + else if (TYPE_SIZE (basetype) == NULL_TREE) + { + cp_error ("base class `%T' has incomplete type", basetype); + continue; + } +#endif + else + { + if (CLASSTYPE_MARKED (basetype)) + { + if (basetype == ref) + cp_error ("recursive type `%T' undefined", basetype); + else + cp_error ("duplicate base type `%T' invalid", basetype); + continue; + } + + /* Note that the BINFO records which describe individual + inheritances are *not* shared in the lattice! They + cannot be shared because a given baseclass may be + inherited with different `accessibility' by different + derived classes. (Each BINFO record describing an + individual inheritance contains flags which say what + the `accessibility' of that particular inheritance is.) */ + + base_binfo = make_binfo (integer_zero_node, basetype, + TYPE_BINFO_VTABLE (basetype), + TYPE_BINFO_VIRTUALS (basetype), 0); + + TREE_VEC_ELT (binfos, i) = base_binfo; + TREE_VIA_PUBLIC (base_binfo) = via_public; + TREE_VIA_PROTECTED (base_binfo) = via_protected; + TREE_VIA_VIRTUAL (base_binfo) = via_virtual; + + SET_CLASSTYPE_MARKED (basetype); +#if 0 +/* XYZZY TEST VIRTUAL BASECLASSES */ +if (CLASSTYPE_N_BASECLASSES (basetype) == NULL_TREE + && TYPE_HAS_DEFAULT_CONSTRUCTOR (basetype) + && via_virtual == 0) + { + warning ("making type `%s' a virtual baseclass", + TYPE_NAME_STRING (basetype)); + via_virtual = 1; + } +#endif + /* We are free to modify these bits because they are meaningless + at top level, and BASETYPE is a top-level type. */ + if (via_virtual || TYPE_USES_VIRTUAL_BASECLASSES (basetype)) + { + TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1; + TYPE_USES_COMPLEX_INHERITANCE (ref) = 1; + } + + TYPE_OVERLOADS_METHOD_CALL_EXPR (ref) |= TYPE_OVERLOADS_METHOD_CALL_EXPR (basetype); + TREE_GETS_NEW (ref) |= TREE_GETS_NEW (basetype); + TREE_GETS_PLACED_NEW (ref) |= TREE_GETS_PLACED_NEW (basetype); + TREE_GETS_DELETE (ref) |= TREE_GETS_DELETE (basetype); + CLASSTYPE_LOCAL_TYPEDECLS (ref) |= CLASSTYPE_LOCAL_TYPEDECLS (basetype); + i += 1; + } + } + if (i) + TREE_VEC_LENGTH (binfos) = i; + else + BINFO_BASETYPES (TYPE_BINFO (ref)) = NULL_TREE; + + if (i > 1) + TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1; + else if (i == 1) + TYPE_USES_MULTIPLE_INHERITANCE (ref) + = TYPE_USES_MULTIPLE_INHERITANCE (BINFO_TYPE (TREE_VEC_ELT (binfos, 0))); + if (TYPE_USES_MULTIPLE_INHERITANCE (ref)) + TYPE_USES_COMPLEX_INHERITANCE (ref) = 1; + + /* Unmark all the types. */ + while (--i >= 0) + CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (TREE_VEC_ELT (binfos, i))); + CLEAR_CLASSTYPE_MARKED (ref); + } + + just_return: + + /* Until the type is defined, tentatively accept whatever + structure tag the user hands us. */ + if (TYPE_SIZE (ref) == NULL_TREE + && ref != current_class_type + /* Have to check this, in case we have contradictory tag info. */ + && IS_AGGR_TYPE_CODE (TREE_CODE (ref))) + { + if (tag_code == class_type) + CLASSTYPE_DECLARED_CLASS (ref) = 1; + else if (tag_code == record_type || tag_code == signature_type) + CLASSTYPE_DECLARED_CLASS (ref) = 0; + } + + pop_obstacks (); + + return ref; +} + +static tree current_local_enum = NULL_TREE; + +/* Begin compiling the definition of an enumeration type. + NAME is its name (or null if anonymous). + Returns the type object, as yet incomplete. + Also records info about it so that build_enumerator + may be used to declare the individual values as they are read. */ + +tree +start_enum (name) + tree name; +{ + register tree enumtype = NULL_TREE; + struct binding_level *b = inner_binding_level; + + /* If this is the real definition for a previous forward reference, + fill in the contents in the same object that used to be the + forward reference. */ + + if (name != NULL_TREE) + enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1); + + if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE) + cp_error ("multiple definition of enum `%T'", enumtype); + else + { + enumtype = make_node (ENUMERAL_TYPE); + pushtag (name, enumtype, 0); + } + + if (current_class_type) + TREE_ADDRESSABLE (b->tags) = 1; + current_local_enum = NULL_TREE; + + if (TYPE_VALUES (enumtype) != NULL_TREE) + /* Completely replace its old definition. + The old enumerators remain defined, however. */ + TYPE_VALUES (enumtype) = NULL_TREE; + + /* Initially, set up this enum as like `int' + so that we can create the enumerators' declarations and values. + Later on, the precision of the type may be changed and + it may be laid out again. */ + + TYPE_PRECISION (enumtype) = TYPE_PRECISION (integer_type_node); + TYPE_SIZE (enumtype) = NULL_TREE; + fixup_unsigned_type (enumtype); + + /* We copy this value because enumerated type constants + are really of the type of the enumerator, not integer_type_node. */ + enum_next_value = copy_node (integer_zero_node); + + GNU_xref_decl (current_function_decl, enumtype); + return enumtype; +} + +/* After processing and defining all the values of an enumeration type, + install their decls in the enumeration type and finish it off. + ENUMTYPE is the type object and VALUES a list of name-value pairs. + Returns ENUMTYPE. */ + +tree +finish_enum (enumtype, values) + register tree enumtype, values; +{ + register tree pair, tem; + register HOST_WIDE_INT maxvalue = 0; + register HOST_WIDE_INT minvalue = 0; + register HOST_WIDE_INT i; + + TYPE_VALUES (enumtype) = values; + + /* Calculate the maximum value of any enumerator in this type. */ + + if (values) + { + /* Speed up the main loop by performing some precalculations */ + + HOST_WIDE_INT value = TREE_INT_CST_LOW (TREE_VALUE (values)); + TREE_TYPE (TREE_VALUE (values)) = enumtype; + minvalue = maxvalue = value; + + for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair)) + { + value = TREE_INT_CST_LOW (TREE_VALUE (pair)); + if (value > maxvalue) + maxvalue = value; + else if (value < minvalue) + minvalue = value; + TREE_TYPE (TREE_VALUE (pair)) = enumtype; + } + } + + if (flag_short_enums) + { + /* Determine the precision this type needs, lay it out, and define it. */ + + for (i = maxvalue; i; i >>= 1) + TYPE_PRECISION (enumtype)++; + + if (!TYPE_PRECISION (enumtype)) + TYPE_PRECISION (enumtype) = 1; + + /* Cancel the laying out previously done for the enum type, + so that fixup_unsigned_type will do it over. */ + TYPE_SIZE (enumtype) = NULL_TREE; + + fixup_unsigned_type (enumtype); + } + + TREE_INT_CST_LOW (TYPE_MAX_VALUE (enumtype)) = maxvalue; + + /* An enum can have some negative values; then it is signed. */ + if (minvalue < 0) + { + TREE_INT_CST_LOW (TYPE_MIN_VALUE (enumtype)) = minvalue; + TREE_INT_CST_HIGH (TYPE_MIN_VALUE (enumtype)) = -1; + TREE_UNSIGNED (enumtype) = 0; + } + if (flag_cadillac) + cadillac_finish_enum (enumtype); + + /* Fix up all variant types of this enum type. */ + for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem)) + { + TYPE_VALUES (tem) = TYPE_VALUES (enumtype); + TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype); + TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype); + TYPE_SIZE (tem) = TYPE_SIZE (enumtype); + TYPE_MODE (tem) = TYPE_MODE (enumtype); + TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype); + TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype); + TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype); + } + + /* Finish debugging output for this type. */ +#if 0 + /* @@ Do we ever generate generate ENUMERAL_TYPE nodes for which debugging + information should *not* be generated? I think not. */ + if (! DECL_IGNORED_P (TYPE_NAME (enumtype))) +#endif + rest_of_type_compilation (enumtype, global_bindings_p ()); + + return enumtype; +} + +/* Build and install a CONST_DECL for one value of the + current enumeration type (one that was begun with start_enum). + Return a tree-list containing the name and its value. + Assignment of sequential values by default is handled here. */ + +tree +build_enumerator (name, value) + tree name, value; +{ + tree decl, result; + /* Change this to zero if we find VALUE is not shareable. */ + int shareable = 1; + + /* Remove no-op casts from the value. */ + if (value) + STRIP_TYPE_NOPS (value); + + /* Validate and default VALUE. */ + if (value != NULL_TREE) + { + if (TREE_READONLY_DECL_P (value)) + { + value = decl_constant_value (value); + shareable = 0; + } + + if (TREE_CODE (value) == INTEGER_CST) + { + value = default_conversion (value); + constant_expression_warning (value); + } + else + { + error ("enumerator value for `%s' not integer constant", + IDENTIFIER_POINTER (name)); + value = NULL_TREE; + } + } + + /* The order of things is reversed here so that we + can check for possible sharing of enum values, + to keep that from happening. */ + /* Default based on previous value. */ + if (value == NULL_TREE) + value = enum_next_value; + + /* Remove no-op casts from the value. */ + if (value) + STRIP_TYPE_NOPS (value); + + /* Make up for hacks in cp-lex.c. */ + if (value == integer_zero_node) + value = build_int_2 (0, 0); + else if (value == integer_one_node) + value = build_int_2 (1, 0); + else if (TREE_CODE (value) == INTEGER_CST + && (shareable == 0 + || TREE_CODE (TREE_TYPE (value)) == ENUMERAL_TYPE)) + { + value = copy_node (value); + TREE_TYPE (value) = integer_type_node; + } + + result = saveable_tree_cons (name, value, NULL_TREE); + + /* C++ associates enums with global, function, or class declarations. */ + + /* There are a number of cases we need to be aware of here: + current_class_type current_function_decl + * global enums NULL NULL + * fn-local enum NULL SET + * class-local enum SET NULL + * class->fn->enum SET SET + * fn->class->enum SET SET + + Those last two make life interesting. If it's a fn-local enum which is + itself inside a class, we need the enum to go into the fn's decls (our + second case below). But if it's a class-local enum and the class itself + is inside a function, we need that enum to go into the decls for the + class. To achieve this last goal, we must see if, when both + current_class_decl and current_function_decl are set, the class was + declared inside that function. If so, we know to put the enum into + the class's scope. */ + + if ((current_class_type && ! current_function_decl) + || (current_class_type && current_function_decl + && TYPE_CONTEXT (current_class_type) == current_function_decl)) + { + /* This enum declaration is local to the class, so we must put + it in that class's list of decls. */ + decl = build_lang_field_decl (CONST_DECL, name, integer_type_node); + DECL_INITIAL (decl) = value; + TREE_READONLY (decl) = 1; + pushdecl_class_level (decl); + TREE_CHAIN (decl) = current_local_enum; + current_local_enum = decl; + } + else + { + /* It's a global enum, or it's local to a function. (Note local to + a function could mean local to a class method. */ + decl = build_decl (CONST_DECL, name, integer_type_node); + DECL_INITIAL (decl) = value; + + pushdecl (decl); + GNU_xref_decl (current_function_decl, decl); + } + + /* Set basis for default for next value. */ + enum_next_value = build_binary_op_nodefault (PLUS_EXPR, value, + integer_one_node, PLUS_EXPR); + if (enum_next_value == integer_one_node) + enum_next_value = copy_node (enum_next_value); + + return result; +} + +tree +grok_enum_decls (type, decl) + tree type, decl; +{ + tree d = current_local_enum; + + if (d == NULL_TREE) + return decl; + + while (1) + { + TREE_TYPE (d) = type; + if (TREE_CHAIN (d) == NULL_TREE) + { + TREE_CHAIN (d) = decl; + break; + } + d = TREE_CHAIN (d); + } + + decl = current_local_enum; + current_local_enum = NULL_TREE; + + return decl; +} + +/* Create the FUNCTION_DECL for a function definition. + DECLSPECS and DECLARATOR are the parts of the declaration; + they describe the function's name and the type it returns, + but twisted together in a fashion that parallels the syntax of C. + + This function creates a binding context for the function body + as well as setting up the FUNCTION_DECL in current_function_decl. + + Returns 1 on success. If the DECLARATOR is not suitable for a function + (it defines a datum instead), we return 0, which tells + yyparse to report a parse error. + + For C++, we must first check whether that datum makes any sense. + For example, "class A local_a(1,2);" means that variable local_a + is an aggregate of type A, which should have a constructor + applied to it with the argument list [1, 2]. + + @@ There is currently no way to retrieve the storage + @@ allocated to FUNCTION (or all of its parms) if we return + @@ something we had previously. */ + +int +start_function (declspecs, declarator, raises, pre_parsed_p) + tree declarator, declspecs, raises; + int pre_parsed_p; +{ + extern tree EHS_decl; + tree decl1, olddecl; + tree ctype = NULL_TREE; + tree fntype; + tree restype; + extern int have_extern_spec; + extern int used_extern_spec; + int doing_friend = 0; + + if (flag_handle_exceptions && EHS_decl == NULL_TREE) + init_exception_processing_1 (); + + /* Sanity check. */ + my_friendly_assert (TREE_VALUE (void_list_node) == void_type_node, 160); + my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161); + + /* Assume, until we see it does. */ + current_function_returns_value = 0; + current_function_returns_null = 0; + warn_about_return_type = 0; + current_extern_inline = 0; + current_function_assigns_this = 0; + current_function_just_assigned_this = 0; + current_function_parms_stored = 0; + original_result_rtx = NULL_RTX; + current_function_obstack_index = 0; + current_function_obstack_usage = 0; + + clear_temp_name (); + + /* This should only be done once on the top most decl. */ + if (have_extern_spec && !used_extern_spec) + { + declspecs = decl_tree_cons (NULL_TREE, get_identifier ("extern"), declspecs); + used_extern_spec = 1; + } + + if (pre_parsed_p) + { + decl1 = declarator; + + if (! DECL_ARGUMENTS (decl1) + && !DECL_STATIC_FUNCTION_P (decl1) + && DECL_CONTEXT (decl1) + && DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl1))) + && IDENTIFIER_TEMPLATE (DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl1))))) + { + cp_error ("redeclaration of `%#D'", decl1); + if (IDENTIFIER_CLASS_VALUE (DECL_NAME (decl1))) + cp_error_at ("previous declaration here", IDENTIFIER_CLASS_VALUE (DECL_NAME (decl1))); + else if (IDENTIFIER_GLOBAL_VALUE (DECL_NAME (decl1))) + cp_error_at ("previous declaration here", IDENTIFIER_GLOBAL_VALUE (DECL_NAME (decl1))); + } + + last_function_parms = DECL_ARGUMENTS (decl1); + last_function_parm_tags = NULL_TREE; + fntype = TREE_TYPE (decl1); + if (TREE_CODE (fntype) == METHOD_TYPE) + ctype = TYPE_METHOD_BASETYPE (fntype); + + /* ANSI C++ June 5 1992 WP 11.4.5. A friend function defined in a + class is in the (lexical) scope of the class in which it is + defined. */ + if (!ctype && DECL_FRIEND_P (decl1)) + { + ctype = DECL_CLASS_CONTEXT (decl1); + + /* CTYPE could be null here if we're dealing with a template; + for example, `inline friend float foo()' inside a template + will have no CTYPE set. */ + if (ctype && TREE_CODE (ctype) != RECORD_TYPE) + ctype = NULL_TREE; + else + doing_friend = 1; + } + + if ( !(DECL_VINDEX (decl1) + && write_virtuals >= 2 + && CLASSTYPE_VTABLE_NEEDS_WRITING (ctype))) + current_extern_inline = TREE_PUBLIC (decl1) && DECL_INLINE (decl1); + + raises = TYPE_RAISES_EXCEPTIONS (fntype); + + /* In a fcn definition, arg types must be complete. */ + require_complete_types_for_parms (last_function_parms); + } + else + { + decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, raises); + /* If the declarator is not suitable for a function definition, + cause a syntax error. */ + if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL) return 0; + + fntype = TREE_TYPE (decl1); + + restype = TREE_TYPE (fntype); + if (IS_AGGR_TYPE (restype) && ! TYPE_PTRMEMFUNC_P (restype) + && ! CLASSTYPE_GOT_SEMICOLON (restype)) + { + cp_error ("semicolon missing after declaration of `%#T'", restype); + shadow_tag (build_tree_list (NULL_TREE, restype)); + CLASSTYPE_GOT_SEMICOLON (restype) = 1; + if (TREE_CODE (fntype) == FUNCTION_TYPE) + fntype = build_function_type (integer_type_node, + TYPE_ARG_TYPES (fntype)); + else + fntype = build_cplus_method_type (build_type_variant (TYPE_METHOD_BASETYPE (fntype), TREE_READONLY (decl1), TREE_SIDE_EFFECTS (decl1)), + integer_type_node, + TYPE_ARG_TYPES (fntype)); + TREE_TYPE (decl1) = fntype; + } + + if (TREE_CODE (fntype) == METHOD_TYPE) + ctype = TYPE_METHOD_BASETYPE (fntype); + else if (IDENTIFIER_LENGTH (DECL_NAME (decl1)) == 4 + && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (decl1)), "main") + && DECL_CONTEXT (decl1) == NULL_TREE) + { + /* If this doesn't return integer_type, complain. */ + if (TREE_TYPE (TREE_TYPE (decl1)) != integer_type_node) + { + warning ("return type for `main' changed to integer type"); + TREE_TYPE (decl1) = fntype = default_function_type; + } + warn_about_return_type = 0; + } + } + + /* Warn if function was previously implicitly declared + (but not if we warned then). */ + if (! warn_implicit + && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)) != NULL_TREE) + cp_warning_at ("`%D' implicitly declared before its definition", IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1))); + + current_function_decl = decl1; + + if (flag_cadillac) + cadillac_start_function (decl1); + else + announce_function (decl1); + + if (TYPE_SIZE (TREE_TYPE (fntype)) == NULL_TREE) + { + if (IS_AGGR_TYPE (TREE_TYPE (fntype))) + error_with_aggr_type (TREE_TYPE (fntype), + "return-type `%s' is an incomplete type"); + else + error ("return-type is an incomplete type"); + + /* Make it return void instead, but don't change the + type of the DECL_RESULT, in case we have a named return value. */ + if (ctype) + TREE_TYPE (decl1) + = build_cplus_method_type (build_type_variant (ctype, + TREE_READONLY (decl1), + TREE_SIDE_EFFECTS (decl1)), + void_type_node, + FUNCTION_ARG_CHAIN (decl1)); + else + TREE_TYPE (decl1) + = build_function_type (void_type_node, + TYPE_ARG_TYPES (TREE_TYPE (decl1))); + DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, TREE_TYPE (fntype)); + } + + if (warn_about_return_type) + warning ("return-type defaults to `int'"); + + /* Make the init_value nonzero so pushdecl knows this is not tentative. + error_mark_node is replaced below (in poplevel) with the BLOCK. */ + DECL_INITIAL (decl1) = error_mark_node; + + /* Didn't get anything from C. */ + olddecl = NULL_TREE; + + /* This function exists in static storage. + (This does not mean `static' in the C sense!) */ + TREE_STATIC (decl1) = 1; + + /* If this function belongs to an interface, it is public. + If it belongs to someone else's interface, it is also external. + It doesn't matter whether it's inline or not. */ + if (interface_unknown == 0) + { + TREE_PUBLIC (decl1) = 1; + DECL_EXTERNAL (decl1) = (interface_only + || (DECL_INLINE (decl1) + && ! flag_implement_inlines)); + } + else + /* This is a definition, not a reference. + So normally clear DECL_EXTERNAL. + However, `extern inline' acts like a declaration except for + defining how to inline. So set DECL_EXTERNAL in that case. */ + DECL_EXTERNAL (decl1) = current_extern_inline; + + /* Now see if this is the implementation of a declared function. */ + if (ctype == NULL_TREE && current_lang_name == lang_name_cplusplus + && !DECL_CONTEXT (decl1)) + { + olddecl = lookup_name_current_level (DECL_NAME (decl1)); + if (olddecl && TREE_CODE (olddecl) != FUNCTION_DECL) + olddecl = NULL_TREE; + if (olddecl && DECL_NAME (decl1) != DECL_NAME (olddecl)) + { + /* Collision between user and internal naming scheme. */ + olddecl = lookup_name_current_level (DECL_ASSEMBLER_NAME (decl1)); + if (olddecl == NULL_TREE) + olddecl = decl1; + } + if (olddecl && olddecl != decl1 + && DECL_NAME (decl1) == DECL_NAME (olddecl)) + { + if (TREE_CODE (olddecl) == FUNCTION_DECL + && decls_match (decl1, olddecl)) + { + olddecl = DECL_MAIN_VARIANT (olddecl); + /* The following copy is needed to handle forcing a function's + linkage to obey the linkage of the original decl. */ + DECL_ASSEMBLER_NAME (decl1) = DECL_ASSEMBLER_NAME (olddecl); + DECL_OVERLOADED (decl1) = DECL_OVERLOADED (olddecl); + if (! DECL_BUILT_IN (olddecl) && DECL_INITIAL (olddecl)) + redeclaration_error_message (decl1, olddecl); + if (duplicate_decls (decl1, olddecl)) + decl1 = olddecl; + else + olddecl = NULL_TREE; + } + else + olddecl = NULL_TREE; + } + } + + /* Record the decl so that the function name is defined. + If we already have a decl for this name, and it is a FUNCTION_DECL, + use the old decl. */ + + if (olddecl) + current_function_decl = olddecl; + else if (pre_parsed_p == 0) + { + current_function_decl = pushdecl (decl1); + if (TREE_CODE (current_function_decl) == TREE_LIST) + { + /* @@ revert to modified original declaration. */ + decl1 = DECL_MAIN_VARIANT (decl1); + current_function_decl = decl1; + } + else + { + decl1 = current_function_decl; + DECL_MAIN_VARIANT (decl1) = decl1; + } + fntype = TREE_TYPE (decl1); + } + else + current_function_decl = decl1; + + if (DECL_OVERLOADED (decl1)) + decl1 = push_overloaded_decl (decl1, 1); + + if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)) + { + if (TREE_CODE (fntype) == METHOD_TYPE) + TREE_TYPE (decl1) = fntype + = build_function_type (TREE_TYPE (fntype), + TREE_CHAIN (TYPE_ARG_TYPES (fntype))); + last_function_parms = TREE_CHAIN (last_function_parms); + DECL_ARGUMENTS (decl1) = last_function_parms; + ctype = NULL_TREE; + } + restype = TREE_TYPE (fntype); + + pushlevel (0); + current_binding_level->parm_flag = 1; + + /* Save the parm names or decls from this function's declarator + where store_parm_decls will find them. */ + current_function_parms = last_function_parms; + current_function_parm_tags = last_function_parm_tags; + + GNU_xref_function (decl1, current_function_parms); + + make_function_rtl (decl1); + + if (ctype) + { + push_nested_class (ctype, 1); + + /* If we're compiling a friend function, neither of the variables + current_class_decl nor current_class_type will have values. */ + if (! doing_friend) + { + /* We know that this was set up by `grokclassfn'. + We do not wait until `store_parm_decls', since evil + parse errors may never get us to that point. Here + we keep the consistency between `current_class_type' + and `current_class_decl'. */ + current_class_decl = last_function_parms; + my_friendly_assert (current_class_decl != NULL_TREE + && TREE_CODE (current_class_decl) == PARM_DECL, 162); + if (TREE_CODE (TREE_TYPE (current_class_decl)) == POINTER_TYPE) + { + tree variant = TREE_TYPE (TREE_TYPE (current_class_decl)); + if (CLASSTYPE_INST_VAR (ctype) == NULL_TREE) + { + /* Can't call build_indirect_ref here, because it has special + logic to return C_C_D given this argument. */ + C_C_D = build1 (INDIRECT_REF, current_class_type, current_class_decl); + CLASSTYPE_INST_VAR (ctype) = C_C_D; + } + else + { + C_C_D = CLASSTYPE_INST_VAR (ctype); + /* `current_class_decl' is different for every + function we compile. */ + TREE_OPERAND (C_C_D, 0) = current_class_decl; + } + TREE_READONLY (C_C_D) = TYPE_READONLY (variant); + TREE_SIDE_EFFECTS (C_C_D) = TYPE_VOLATILE (variant); + TREE_THIS_VOLATILE (C_C_D) = TYPE_VOLATILE (variant); + } + else + C_C_D = current_class_decl; + } + } + else + { + if (DECL_STATIC_FUNCTION_P (decl1)) + push_nested_class (DECL_CONTEXT (decl1), 2); + else + push_memoized_context (0, 1); + } + + /* Allocate further tree nodes temporarily during compilation + of this function only. Tiemann moved up here from bottom of fn. */ + temporary_allocation (); + + /* Promote the value to int before returning it. */ + if (C_PROMOTING_INTEGER_TYPE_P (restype)) + { + /* It retains unsignedness if traditional or if it isn't + really getting wider. */ + if (TREE_UNSIGNED (restype) + && (flag_traditional + || TYPE_PRECISION (restype) + == TYPE_PRECISION (integer_type_node))) + restype = unsigned_type_node; + else + restype = integer_type_node; + } + if (DECL_RESULT (decl1) == NULL_TREE) + DECL_RESULT (decl1) = build_decl (RESULT_DECL, 0, restype); + + if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl1))) + { + dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + ctor_label = NULL_TREE; + } + else + { + dtor_label = NULL_TREE; + if (DECL_CONSTRUCTOR_P (decl1)) + ctor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + } + + /* If this fcn was already referenced via a block-scope `extern' decl + (or an implicit decl), propagate certain information about the usage. */ + if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl1))) + TREE_ADDRESSABLE (decl1) = 1; + + return 1; +} + +/* Store the parameter declarations into the current function declaration. + This is called after parsing the parameter declarations, before + digesting the body of the function. + + Also install to binding contour return value identifier, if any. */ + +void +store_parm_decls () +{ + register tree fndecl = current_function_decl; + register tree parm; + int parms_have_cleanups = 0; + tree eh_decl; + + /* This is either a chain of PARM_DECLs (when a prototype is used). */ + tree specparms = current_function_parms; + + /* This is a list of types declared among parms in a prototype. */ + tree parmtags = current_function_parm_tags; + + /* This is a chain of any other decls that came in among the parm + declarations. If a parm is declared with enum {foo, bar} x; + then CONST_DECLs for foo and bar are put here. */ + tree nonparms = NULL_TREE; + + if (current_binding_level == global_binding_level) + fatal ("parse errors have confused me too much"); + + /* Initialize RTL machinery. */ + init_function_start (fndecl, input_filename, lineno); + + /* Declare __FUNCTION__ and __PRETTY_FUNCTION__ for this function. */ + declare_function_name (); + + /* Create a binding level for the parms. */ + expand_start_bindings (0); + + /* Prepare to catch raises, if appropriate. */ + if (flag_handle_exceptions) + { + /* Get this cleanup to be run last, since it + is a call to `longjmp'. */ + setup_exception_throw_decl (); + eh_decl = current_binding_level->names; + current_binding_level->names = TREE_CHAIN (current_binding_level->names); + } + if (flag_handle_exceptions) + expand_start_try (integer_one_node, 0, 1); + + if (specparms != NULL_TREE) + { + /* This case is when the function was defined with an ANSI prototype. + The parms already have decls, so we need not do anything here + except record them as in effect + and complain if any redundant old-style parm decls were written. */ + + register tree next; + + /* Must clear this because it might contain TYPE_DECLs declared + at class level. */ + storedecls (NULL_TREE); + for (parm = nreverse (specparms); parm; parm = next) + { + next = TREE_CHAIN (parm); + if (TREE_CODE (parm) == PARM_DECL) + { + tree cleanup = maybe_build_cleanup (parm); + if (DECL_NAME (parm) == NULL_TREE) + { +#if 0 + cp_error_at ("parameter name omitted", parm); +#else + /* for C++, this is not an error. */ + pushdecl (parm); +#endif + } + else if (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) == void_type_node) + cp_error ("parameter `%D' declared void", parm); + else + { + /* Now fill in DECL_REFERENCE_SLOT for any of the parm decls. + A parameter is assumed not to have any side effects. + If this should change for any reason, then this + will have to wrap the bashed reference type in a save_expr. + + Also, if the parameter type is declared to be an X + and there is an X(X&) constructor, we cannot lay it + into the stack (any more), so we make this parameter + look like it is really of reference type. Functions + which pass parameters to this function will know to + create a temporary in their frame, and pass a reference + to that. */ + + if (TREE_CODE (TREE_TYPE (parm)) == REFERENCE_TYPE + && TYPE_SIZE (TREE_TYPE (TREE_TYPE (parm)))) + SET_DECL_REFERENCE_SLOT (parm, convert_from_reference (parm)); + + pushdecl (parm); + } + if (cleanup) + { + expand_decl (parm); + expand_decl_cleanup (parm, cleanup); + parms_have_cleanups = 1; + } + } + else + { + /* If we find an enum constant or a type tag, + put it aside for the moment. */ + TREE_CHAIN (parm) = NULL_TREE; + nonparms = chainon (nonparms, parm); + } + } + + /* Get the decls in their original chain order + and record in the function. This is all and only the + PARM_DECLs that were pushed into scope by the loop above. */ + DECL_ARGUMENTS (fndecl) = getdecls (); + + storetags (chainon (parmtags, gettags ())); + } + else + DECL_ARGUMENTS (fndecl) = NULL_TREE; + + /* Now store the final chain of decls for the arguments + as the decl-chain of the current lexical scope. + Put the enumerators in as well, at the front so that + DECL_ARGUMENTS is not modified. */ + + storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl))); + + /* Initialize the RTL code for the function. */ + DECL_SAVED_INSNS (fndecl) = NULL_RTX; + expand_function_start (fndecl, parms_have_cleanups); + + if (flag_handle_exceptions) + { + /* Make the throw decl visible at this level, just + not in the way of the parameters. */ + pushdecl (eh_decl); + expand_decl_init (eh_decl); + } + + /* Create a binding contour which can be used to catch + cleanup-generated temporaries. Also, if the return value needs or + has initialization, deal with that now. */ + if (parms_have_cleanups) + { + pushlevel (0); + expand_start_bindings (0); + } + + current_function_parms_stored = 1; + + if (flag_gc) + { + maybe_gc_cleanup = build_tree_list (NULL_TREE, error_mark_node); + expand_decl_cleanup (NULL_TREE, maybe_gc_cleanup); + } + + /* If this function is `main', emit a call to `__main' + to run global initializers, etc. */ + if (DECL_NAME (fndecl) + && IDENTIFIER_LENGTH (DECL_NAME (fndecl)) == 4 + && strcmp (IDENTIFIER_POINTER (DECL_NAME (fndecl)), "main") == 0 + && DECL_CONTEXT (fndecl) == NULL_TREE) + { + expand_main_function (); + + if (flag_gc) + expand_expr (build_function_call (lookup_name (get_identifier ("__gc_main"), 0), NULL_TREE), + 0, VOIDmode, 0); + + if (flag_dossier) + output_builtin_tdesc_entries (); + } +} + +/* Bind a name and initialization to the return value of + the current function. */ +void +store_return_init (return_id, init) + tree return_id, init; +{ + tree decl = DECL_RESULT (current_function_decl); + + if (pedantic) + /* Give this error as many times as there are occurrences, + so that users can use Emacs compilation buffers to find + and fix all such places. */ + error ("ANSI C++ does not permit named return values"); + + if (return_id != NULL_TREE) + { + if (DECL_NAME (decl) == NULL_TREE) + { + DECL_NAME (decl) = return_id; + DECL_ASSEMBLER_NAME (decl) = return_id; + } + else + error ("return identifier `%s' already in place", + IDENTIFIER_POINTER (DECL_NAME (decl))); + } + + /* Can't let this happen for constructors. */ + if (DECL_CONSTRUCTOR_P (current_function_decl)) + { + error ("can't redefine default return value for constructors"); + return; + } + + /* If we have a named return value, put that in our scope as well. */ + if (DECL_NAME (decl) != NULL_TREE) + { + /* If this named return value comes in a register, + put it in a pseudo-register. */ + if (DECL_REGISTER (decl)) + { + original_result_rtx = DECL_RTL (decl); + DECL_RTL (decl) = gen_reg_rtx (DECL_MODE (decl)); + } + + /* Let `finish_decl' know that this initializer is ok. */ + DECL_INITIAL (decl) = init; + pushdecl (decl); + finish_decl (decl, init, 0, 0); + } +} + +#if 0 +/* Generate code for default X() constructor. */ +static void +build_default_constructor (fndecl) + tree fndecl; +{ + int i = CLASSTYPE_N_BASECLASSES (current_class_type); + tree parm = TREE_CHAIN (DECL_ARGUMENTS (fndecl)); + tree fields = TYPE_FIELDS (current_class_type); + tree binfos = TYPE_BINFO_BASETYPES (current_class_type); + + if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) + parm = TREE_CHAIN (parm); + parm = DECL_REFERENCE_SLOT (parm); + + while (--i >= 0) + { + tree basetype = TREE_VEC_ELT (binfos, i); + if (TYPE_HAS_INIT_REF (basetype)) + { + tree name = TYPE_NAME (basetype); + if (TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + current_base_init_list = tree_cons (name, parm, current_base_init_list); + } + } + for (; fields; fields = TREE_CHAIN (fields)) + { + tree name, init; + if (TREE_STATIC (fields)) + continue; + if (TREE_CODE (fields) != FIELD_DECL) + continue; + if (DECL_NAME (fields)) + { + if (VFIELD_NAME_P (DECL_NAME (fields))) + continue; + if (VBASE_NAME_P (DECL_NAME (fields))) + continue; + + /* True for duplicate members. */ + if (IDENTIFIER_CLASS_VALUE (DECL_NAME (fields)) != fields) + continue; + } + + init = build (COMPONENT_REF, TREE_TYPE (fields), parm, fields); + init = build_tree_list (NULL_TREE, init); + + current_member_init_list + = tree_cons (DECL_NAME (fields), init, current_member_init_list); + } +} +#endif + +/* Finish up a function declaration and compile that function + all the way to assembler language output. The free the storage + for the function definition. + + This is called after parsing the body of the function definition. + LINENO is the current line number. + + C++: CALL_POPLEVEL is non-zero if an extra call to poplevel + (and expand_end_bindings) must be made to take care of the binding + contour for the base initializers. This is only relevant for + constructors. */ + +void +finish_function (lineno, call_poplevel) + int lineno; + int call_poplevel; +{ + register tree fndecl = current_function_decl; + tree fntype, ctype = NULL_TREE; + rtx head, last_parm_insn, mark; + extern int sets_exception_throw_decl; + /* Label to use if this function is supposed to return a value. */ + tree no_return_label = NULL_TREE; + tree decls = NULL_TREE; + + /* When we get some parse errors, we can end up without a + current_function_decl, so cope. */ + if (fndecl == NULL_TREE) + return; + + fntype = TREE_TYPE (fndecl); + +/* TREE_READONLY (fndecl) = 1; + This caused &foo to be of type ptr-to-const-function + which then got a warning when stored in a ptr-to-function variable. */ + + /* This happens on strange parse errors. */ + if (! current_function_parms_stored) + { + call_poplevel = 0; + store_parm_decls (); + } + + if (write_symbols != NO_DEBUG && TREE_CODE (fntype) != METHOD_TYPE) + { + tree ttype = target_type (fntype); + tree parmdecl; + + if (IS_AGGR_TYPE (ttype)) + /* Let debugger know it should output info for this type. */ + note_debug_info_needed (ttype); + + for (parmdecl = DECL_ARGUMENTS (fndecl); parmdecl; parmdecl = TREE_CHAIN (parmdecl)) + { + ttype = target_type (TREE_TYPE (parmdecl)); + if (IS_AGGR_TYPE (ttype)) + /* Let debugger know it should output info for this type. */ + note_debug_info_needed (ttype); + } + } + + /* Clean house because we will need to reorder insns here. */ + do_pending_stack_adjust (); + + if (dtor_label) + { + tree binfo = TYPE_BINFO (current_class_type); + tree cond = integer_one_node; + tree exprstmt, vfields; + tree in_charge_node = lookup_name (in_charge_identifier, 0); + tree virtual_size; + int ok_to_optimize_dtor = 0; + + if (current_function_assigns_this) + cond = build (NE_EXPR, integer_type_node, + current_class_decl, integer_zero_node); + else + { + int n_baseclasses = CLASSTYPE_N_BASECLASSES (current_class_type); + + /* If this destructor is empty, then we don't need to check + whether `this' is NULL in some cases. */ + mark = get_last_insn (); + last_parm_insn = get_first_nonparm_insn (); + + if ((flag_this_is_variable & 1) == 0) + ok_to_optimize_dtor = 1; + else if (mark == last_parm_insn) + ok_to_optimize_dtor + = (n_baseclasses == 0 + || (n_baseclasses == 1 + && TYPE_HAS_DESTRUCTOR (TYPE_BINFO_BASETYPE (current_class_type, 0)))); + } + + /* These initializations might go inline. Protect + the binding level of the parms. */ + pushlevel (0); + expand_start_bindings (0); + + if (current_function_assigns_this) + { + current_function_assigns_this = 0; + current_function_just_assigned_this = 0; + } + + /* Generate the code to call destructor on base class. + If this destructor belongs to a class with virtual + functions, then set the virtual function table + pointer to represent the type of our base class. */ + + /* This side-effect makes call to `build_delete' generate the + code we have to have at the end of this destructor. */ + TYPE_HAS_DESTRUCTOR (current_class_type) = 0; + + /* These are two cases where we cannot delegate deletion. */ + if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type) + || TREE_GETS_DELETE (current_class_type)) + exprstmt = build_delete (current_class_type, C_C_D, integer_zero_node, + LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); + else + exprstmt = build_delete (current_class_type, C_C_D, in_charge_node, + LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); + + /* If we did not assign to this, then `this' is non-zero at + the end of a destructor. As a special optimization, don't + emit test if this is an empty destructor. If it does nothing, + it does nothing. If it calls a base destructor, the base + destructor will perform the test. */ + + if (exprstmt != error_mark_node + && (TREE_CODE (exprstmt) != NOP_EXPR + || TREE_OPERAND (exprstmt, 0) != integer_zero_node + || TYPE_USES_VIRTUAL_BASECLASSES (current_class_type))) + { + expand_label (dtor_label); + if (cond != integer_one_node) + expand_start_cond (cond, 0); + if (exprstmt != void_zero_node) + /* Don't call `expand_expr_stmt' if we're not going to do + anything, since -Wall will give a diagnostic. */ + expand_expr_stmt (exprstmt); + + /* Run destructor on all virtual baseclasses. */ + if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) + { + tree vbases = nreverse (copy_list (CLASSTYPE_VBASECLASSES (current_class_type))); + expand_start_cond (build (BIT_AND_EXPR, integer_type_node, + in_charge_node, integer_two_node), 0); + while (vbases) + { + if (TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (vbases))) + { + tree ptr = convert_pointer_to_vbase (vbases, current_class_decl); + expand_expr_stmt (build_delete (TYPE_POINTER_TO (BINFO_TYPE (vbases)), + ptr, integer_zero_node, + LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR|LOOKUP_HAS_IN_CHARGE, 0)); + } + vbases = TREE_CHAIN (vbases); + } + expand_end_cond (); + } + + do_pending_stack_adjust (); + if (cond != integer_one_node) + expand_end_cond (); + } + + TYPE_HAS_DESTRUCTOR (current_class_type) = 1; + + virtual_size = c_sizeof (current_class_type); + + /* At the end, call delete if that's what's requested. */ + if (TREE_GETS_DELETE (current_class_type)) + /* This NOP_EXPR means we are in a static call context. */ + exprstmt = + build_method_call + (build_indirect_ref + (build1 (NOP_EXPR, TYPE_POINTER_TO (current_class_type), + error_mark_node), + NULL_PTR), + ansi_opname[(int) DELETE_EXPR], + tree_cons (NULL_TREE, current_class_decl, + build_tree_list (NULL_TREE, virtual_size)), + NULL_TREE, LOOKUP_NORMAL); + else if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) + exprstmt = build_x_delete (ptr_type_node, current_class_decl, 0, + virtual_size); + else + exprstmt = NULL_TREE; + + if (exprstmt) + { + cond = build (BIT_AND_EXPR, integer_type_node, + in_charge_node, integer_one_node); + expand_start_cond (cond, 0); + expand_expr_stmt (exprstmt); + expand_end_cond (); + } + + /* End of destructor. */ + expand_end_bindings (NULL_TREE, getdecls() != NULL_TREE, 0); + poplevel (2, 0, 0); /* XXX change to 1 */ + + /* Back to the top of destructor. */ + /* Dont execute destructor code if `this' is NULL. */ + mark = get_last_insn (); + last_parm_insn = get_first_nonparm_insn (); + if (last_parm_insn == NULL_RTX) + last_parm_insn = mark; + else + last_parm_insn = previous_insn (last_parm_insn); + + /* Make all virtual function table pointers in non-virtual base + classes point to CURRENT_CLASS_TYPE's virtual function + tables. */ + init_vtbl_ptrs (binfo, 1, 0); + if (TYPE_USES_VIRTUAL_BASECLASSES (current_class_type)) + expand_expr_stmt (build_vbase_vtables_init (binfo, binfo, + C_C_D, current_class_decl, 0)); + if (! ok_to_optimize_dtor) + { + cond = build_binary_op (NE_EXPR, + current_class_decl, integer_zero_node, 1); + expand_start_cond (cond, 0); + } + if (mark != get_last_insn ()) + reorder_insns (next_insn (mark), get_last_insn (), last_parm_insn); + if (! ok_to_optimize_dtor) + expand_end_cond (); + } + else if (current_function_assigns_this) + { + /* Does not need to call emit_base_init, because + that is done (if needed) just after assignment to this + is seen. */ + + if (DECL_CONSTRUCTOR_P (current_function_decl)) + { + expand_label (ctor_label); + ctor_label = NULL_TREE; + + if (call_poplevel) + { + decls = getdecls (); + if (flag_handle_exceptions == 2) + deactivate_exception_cleanups (); + expand_end_bindings (decls, decls != NULL_TREE, 0); + poplevel (decls != NULL_TREE, 0, 0); + } + c_expand_return (current_class_decl); + } + else if (TYPE_MAIN_VARIANT (TREE_TYPE ( + DECL_RESULT (current_function_decl))) != void_type_node + && return_label != NULL_RTX) + no_return_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + + current_function_assigns_this = 0; + current_function_just_assigned_this = 0; + base_init_insns = NULL_RTX; + } + else if (DECL_CONSTRUCTOR_P (fndecl)) + { + tree allocated_this; + tree cond, thenclause; + /* Allow constructor for a type to get a new instance of the object + using `build_new'. */ + tree abstract_virtuals = CLASSTYPE_ABSTRACT_VIRTUALS (current_class_type); + CLASSTYPE_ABSTRACT_VIRTUALS (current_class_type) = NULL_TREE; + + DECL_RETURNS_FIRST_ARG (fndecl) = 1; + + if (flag_this_is_variable > 0) + { + cond = build_binary_op (EQ_EXPR, + current_class_decl, integer_zero_node, 1); + thenclause = build_modify_expr (current_class_decl, NOP_EXPR, + build_new (NULL_TREE, current_class_type, void_type_node, 0)); + if (flag_handle_exceptions == 2) + { + tree cleanup, cleanup_deallocate; + tree virtual_size; + + /* This is the size of the virtual object pointed to by + allocated_this. In this case, it is simple. */ + virtual_size = c_sizeof (current_class_type); + + allocated_this = build_decl (VAR_DECL, NULL_TREE, ptr_type_node); + DECL_REGISTER (allocated_this) = 1; + DECL_INITIAL (allocated_this) = error_mark_node; + expand_decl (allocated_this); + expand_decl_init (allocated_this); + /* How we cleanup `this' if an exception was raised before + we are ready to bail out. */ + cleanup = TREE_GETS_DELETE (current_class_type) + ? build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, allocated_this, virtual_size, NULL_TREE) + /* The size of allocated_this is wrong, and hence the + second argument to operator delete will be wrong. */ + : build_delete (TREE_TYPE (allocated_this), allocated_this, + integer_three_node, + LOOKUP_NORMAL|LOOKUP_HAS_IN_CHARGE, 1); + cleanup_deallocate + = build_modify_expr (current_class_decl, NOP_EXPR, integer_zero_node); + cleanup = tree_cons (NULL_TREE, cleanup, + build_tree_list (NULL_TREE, cleanup_deallocate)); + + expand_decl_cleanup (allocated_this, + build (COND_EXPR, integer_type_node, + build (NE_EXPR, integer_type_node, + allocated_this, integer_zero_node), + build_compound_expr (cleanup), + integer_zero_node)); + } + } + + CLASSTYPE_ABSTRACT_VIRTUALS (current_class_type) = abstract_virtuals; + + /* must keep the first insn safe. */ + head = get_insns (); + + /* this note will come up to the top with us. */ + mark = get_last_insn (); + + if (flag_this_is_variable > 0) + { + expand_start_cond (cond, 0); + expand_expr_stmt (thenclause); + if (flag_handle_exceptions == 2) + expand_assignment (allocated_this, current_class_decl, 0, 0); + expand_end_cond (); + } + +#if 0 + if (DECL_NAME (fndecl) == NULL_TREE + && TREE_CHAIN (DECL_ARGUMENTS (fndecl)) != NULL_TREE) + build_default_constructor (fndecl); +#endif + + /* Emit insns from `emit_base_init' which sets up virtual + function table pointer(s). */ + emit_insns (base_init_insns); + base_init_insns = NULL_RTX; + + /* This is where the body of the constructor begins. + If there were no insns in this function body, then the + last_parm_insn is also the last insn. + + If optimization is enabled, last_parm_insn may move, so + we don't hold on to it (across emit_base_init). */ + last_parm_insn = get_first_nonparm_insn (); + if (last_parm_insn == NULL_RTX) + last_parm_insn = mark; + else + last_parm_insn = previous_insn (last_parm_insn); + + if (mark != get_last_insn ()) + reorder_insns (next_insn (mark), get_last_insn (), last_parm_insn); + + /* This is where the body of the constructor ends. */ + expand_label (ctor_label); + ctor_label = NULL_TREE; + if (flag_handle_exceptions == 2) + { + expand_assignment (allocated_this, integer_zero_node, 0, 0); + if (call_poplevel) + deactivate_exception_cleanups (); + } + + pop_implicit_try_blocks (NULL_TREE); + + if (call_poplevel) + { + expand_end_bindings (decls = getdecls (), decls != NULL_TREE, 0); + poplevel (decls != NULL_TREE, 1, 0); + } + + c_expand_return (current_class_decl); + + current_function_assigns_this = 0; + current_function_just_assigned_this = 0; + } + else if (IDENTIFIER_LENGTH (DECL_NAME (fndecl)) == 4 + && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (fndecl)), "main") + && DECL_CONTEXT (fndecl) == NULL_TREE) + { + /* Make it so that `main' always returns 0 by default. */ +#ifdef VMS + c_expand_return (integer_one_node); +#else + c_expand_return (integer_zero_node); +#endif + } + else if (return_label != NULL_RTX + && current_function_return_value == NULL_TREE + && ! DECL_NAME (DECL_RESULT (current_function_decl))) + no_return_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + + if (flag_gc) + expand_gc_prologue_and_epilogue (); + + /* That's the end of the vtable decl's life. Need to mark it such + if doing stupid register allocation. + + Note that current_vtable_decl is really an INDIRECT_REF + on top of a VAR_DECL here. */ + if (obey_regdecls && current_vtable_decl) + use_variable (DECL_RTL (TREE_OPERAND (current_vtable_decl, 0))); + + /* If this function is supposed to return a value, ensure that + we do not fall into the cleanups by mistake. The end of our + function will look like this: + + user code (may have return stmt somewhere) + goto no_return_label + cleanup_label: + cleanups + goto return_label + no_return_label: + NOTE_INSN_FUNCTION_END + return_label: + things for return + + If the user omits a return stmt in the USER CODE section, we + will have a control path which reaches NOTE_INSN_FUNCTION_END. + Otherwise, we won't. */ + if (no_return_label) + { + DECL_CONTEXT (no_return_label) = fndecl; + DECL_INITIAL (no_return_label) = error_mark_node; + DECL_SOURCE_FILE (no_return_label) = input_filename; + DECL_SOURCE_LINE (no_return_label) = lineno; + expand_goto (no_return_label); + } + + if (cleanup_label) + { + /* remove the binding contour which is used + to catch cleanup-generated temporaries. */ + expand_end_bindings (0, 0, 0); + poplevel (0, 0, 0); + } + + if (cleanup_label) + /* Emit label at beginning of cleanup code for parameters. */ + emit_label (cleanup_label); + +#if 1 + /* Cheap hack to get better code from GNU C++. Remove when cse is fixed. */ + if (exception_throw_decl && sets_exception_throw_decl == 0) + expand_assignment (exception_throw_decl, integer_zero_node, 0, 0); +#endif + + if (flag_handle_exceptions) + { + expand_end_try (); + expand_start_except (0, 0); + expand_end_except (); + } + + /* Get return value into register if that's where it's supposed to be. */ + if (original_result_rtx) + fixup_result_decl (DECL_RESULT (fndecl), original_result_rtx); + + /* Finish building code that will trigger warnings if users forget + to make their functions return values. */ + if (no_return_label || cleanup_label) + emit_jump (return_label); + if (no_return_label) + { + /* We don't need to call `expand_*_return' here because we + don't need any cleanups here--this path of code is only + for error checking purposes. */ + expand_label (no_return_label); + } + + /* reset scope for C++: if we were in the scope of a class, + then when we finish this function, we are not longer so. + This cannot be done until we know for sure that no more + class members will ever be referenced in this function + (i.e., calls to destructors). */ + if (current_class_name) + { + ctype = current_class_type; + pop_nested_class (1); + } + else + pop_memoized_context (1); + + /* Forget about all overloaded functions defined in + this scope which go away. */ + while (overloads_to_forget) + { + IDENTIFIER_GLOBAL_VALUE (TREE_PURPOSE (overloads_to_forget)) + = TREE_VALUE (overloads_to_forget); + overloads_to_forget = TREE_CHAIN (overloads_to_forget); + } + + /* Generate rtl for function exit. */ + expand_function_end (input_filename, lineno, 1); + + /* This must come after expand_function_end because cleanups might + have declarations (from inline functions) that need to go into + this function's blocks. */ + if (current_binding_level->parm_flag != 1) + my_friendly_abort (122); + poplevel (1, 0, 1); + + /* Must mark the RESULT_DECL as being in this function. */ + DECL_CONTEXT (DECL_RESULT (fndecl)) = DECL_INITIAL (fndecl); + + /* Obey `register' declarations if `setjmp' is called in this fn. */ + if (flag_traditional && current_function_calls_setjmp) + setjmp_protect (DECL_INITIAL (fndecl)); + + /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point + to the FUNCTION_DECL node itself. */ + BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; + + /* So we can tell if jump_optimize sets it to 1. */ + can_reach_end = 0; + + /* ??? Compensate for Sun brain damage in dealing with data segments + of PIC code. */ + if (flag_pic + && (DECL_CONSTRUCTOR_P (fndecl) + || DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (fndecl))) + && CLASSTYPE_NEEDS_VIRTUAL_REINIT (TYPE_METHOD_BASETYPE (fntype))) + DECL_INLINE (fndecl) = 0; + + if (DECL_EXTERNAL (fndecl) + /* This function is just along for the ride. If we can make + it inline, that's great. Otherwise, just punt it. */ + && (DECL_INLINE (fndecl) == 0 + || flag_no_inline + || function_cannot_inline_p (fndecl))) + { + extern int rtl_dump_and_exit; + int old_rtl_dump_and_exit = rtl_dump_and_exit; + int inline_spec = DECL_INLINE (fndecl); + + /* This throws away the code for FNDECL. */ + rtl_dump_and_exit = 1; + /* This throws away the memory of the code for FNDECL. */ + if (flag_no_inline) + DECL_INLINE (fndecl) = 0; + rest_of_compilation (fndecl); + rtl_dump_and_exit = old_rtl_dump_and_exit; + DECL_INLINE (fndecl) = inline_spec; + } + else + { + /* Run the optimizers and output the assembler code for this + function. */ + rest_of_compilation (fndecl); + } + + if (ctype && TREE_ASM_WRITTEN (fndecl)) + note_debug_info_needed (ctype); + + current_function_returns_null |= can_reach_end; + + /* Since we don't normally go through c_expand_return for constructors, + this normally gets the wrong value. + Also, named return values have their return codes emitted after + NOTE_INSN_FUNCTION_END, confusing jump.c. */ + if (DECL_CONSTRUCTOR_P (fndecl) + || DECL_NAME (DECL_RESULT (fndecl)) != NULL_TREE) + current_function_returns_null = 0; + + if (TREE_THIS_VOLATILE (fndecl) && current_function_returns_null) + cp_warning ("`noreturn' function `%D' does return", fndecl); + else if ((warn_return_type || pedantic) + && current_function_returns_null + && TYPE_MAIN_VARIANT (TREE_TYPE (fntype)) != void_type_node) + { + /* If this function returns non-void and control can drop through, + complain. */ + cp_pedwarn ("control reaches end of non-void function `%D'", fndecl); + } + /* With just -W, complain only if function returns both with + and without a value. */ + else if (extra_warnings + && current_function_returns_value && current_function_returns_null) + warning ("this function may return with or without a value"); + + /* Free all the tree nodes making up this function. */ + /* Switch back to allocating nodes permanently + until we start another function. */ + permanent_allocation (); + + if (flag_cadillac) + cadillac_finish_function (fndecl); + + if (DECL_SAVED_INSNS (fndecl) == NULL_RTX) + { + /* Stop pointing to the local nodes about to be freed. */ + /* But DECL_INITIAL must remain nonzero so we know this + was an actual function definition. */ + DECL_INITIAL (fndecl) = error_mark_node; + if (! DECL_CONSTRUCTOR_P (fndecl) + || !TYPE_USES_VIRTUAL_BASECLASSES (TYPE_METHOD_BASETYPE (fntype))) + DECL_ARGUMENTS (fndecl) = NULL_TREE; + } + + /* Let the error reporting routines know that we're outside a function. */ + current_function_decl = NULL_TREE; + named_label_uses = NULL_TREE; +} + +/* Create the FUNCTION_DECL for a function definition. + LINE1 is the line number that the definition absolutely begins on. + LINE2 is the line number that the name of the function appears on. + DECLSPECS and DECLARATOR are the parts of the declaration; + they describe the return type and the name of the function, + but twisted together in a fashion that parallels the syntax of C. + + This function creates a binding context for the function body + as well as setting up the FUNCTION_DECL in current_function_decl. + + Returns a FUNCTION_DECL on success. + + If the DECLARATOR is not suitable for a function (it defines a datum + instead), we return 0, which tells yyparse to report a parse error. + + May return void_type_node indicating that this method is actually + a friend. See grokfield for more details. + + Came here with a `.pushlevel' . + + DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING + CHANGES TO CODE IN `grokfield'. */ +tree +start_method (declspecs, declarator, raises) + tree declarator, declspecs, raises; +{ + tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0, raises); + + /* Something too ugly to handle. */ + if (fndecl == NULL_TREE) + return NULL_TREE; + + /* Pass friends other than inline friend functions back. */ + if (TYPE_MAIN_VARIANT (fndecl) == void_type_node) + return fndecl; + + if (TREE_CODE (fndecl) != FUNCTION_DECL) + /* Not a function, tell parser to report parse error. */ + return NULL_TREE; + + if (IS_SIGNATURE (current_class_type)) + { + IS_DEFAULT_IMPLEMENTATION (fndecl) = 1; + /* In case we need this info later. */ + HAS_DEFAULT_IMPLEMENTATION (current_class_type) = 1; + } + + if (DECL_IN_AGGR_P (fndecl)) + { + if (IDENTIFIER_ERROR_LOCUS (DECL_ASSEMBLER_NAME (fndecl)) != current_class_type) + { + if (DECL_CONTEXT (fndecl)) + cp_error ("`%D' is already defined in class %s", fndecl, + TYPE_NAME_STRING (DECL_CONTEXT (fndecl))); + } + return void_type_node; + } + + /* If we're expanding a template, a function must be explicitly declared + inline if we're to compile it now. If it isn't, we have to wait to see + whether it's needed, and whether an override exists. */ + if (flag_default_inline && !processing_template_defn) + DECL_INLINE (fndecl) = 1; + + /* We read in the parameters on the maybepermanent_obstack, + but we won't be getting back to them until after we + may have clobbered them. So the call to preserve_data + will keep them safe. */ + preserve_data (); + + if (! DECL_FRIEND_P (fndecl)) + { + if (DECL_CHAIN (fndecl) != NULL_TREE) + { + /* Need a fresh node here so that we don't get circularity + when we link these together. If FNDECL was a friend, then + `pushdecl' does the right thing, which is nothing wrt its + current value of DECL_CHAIN. */ + fndecl = copy_node (fndecl); + } + if (TREE_CHAIN (fndecl)) + { + fndecl = copy_node (fndecl); + TREE_CHAIN (fndecl) = NULL_TREE; + } + + if (DECL_CONSTRUCTOR_P (fndecl)) + grok_ctor_properties (current_class_type, fndecl); + else if (IDENTIFIER_OPNAME_P (DECL_NAME (fndecl))) + grok_op_properties (fndecl, DECL_VIRTUAL_P (fndecl), 0); + } + + finish_decl (fndecl, NULL_TREE, NULL_TREE, 0); + + /* Make a place for the parms */ + pushlevel (0); + current_binding_level->parm_flag = 1; + + DECL_IN_AGGR_P (fndecl) = 1; + return fndecl; +} + +/* Go through the motions of finishing a function definition. + We don't compile this method until after the whole class has + been processed. + + FINISH_METHOD must return something that looks as though it + came from GROKFIELD (since we are defining a method, after all). + + This is called after parsing the body of the function definition. + STMTS is the chain of statements that makes up the function body. + + DECL is the ..._DECL that `start_method' provided. */ + +tree +finish_method (decl) + tree decl; +{ + register tree fndecl = decl; + tree old_initial; + tree context = DECL_CONTEXT (fndecl); + + register tree link; + + if (TYPE_MAIN_VARIANT (decl) == void_type_node) + return decl; + + old_initial = DECL_INITIAL (fndecl); + + /* Undo the level for the parms (from start_method). + This is like poplevel, but it causes nothing to be + saved. Saving information here confuses symbol-table + output routines. Besides, this information will + be correctly output when this method is actually + compiled. */ + + /* Clear out the meanings of the local variables of this level; + also record in each decl which block it belongs to. */ + + for (link = current_binding_level->names; link; link = TREE_CHAIN (link)) + { + if (DECL_NAME (link) != NULL_TREE) + IDENTIFIER_LOCAL_VALUE (DECL_NAME (link)) = 0; + my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163); + DECL_CONTEXT (link) = NULL_TREE; + } + + /* Restore all name-meanings of the outer levels + that were shadowed by this level. */ + + for (link = current_binding_level->shadowed; link; link = TREE_CHAIN (link)) + IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + for (link = current_binding_level->class_shadowed; + link; link = TREE_CHAIN (link)) + IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + for (link = current_binding_level->type_shadowed; + link; link = TREE_CHAIN (link)) + IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link); + + GNU_xref_end_scope ((HOST_WIDE_INT) current_binding_level, + (HOST_WIDE_INT) current_binding_level->level_chain, + current_binding_level->parm_flag, + current_binding_level->keep, + current_binding_level->tag_transparent); + + poplevel (0, 0, 0); + + DECL_INITIAL (fndecl) = old_initial; + + /* We used to check if the context of FNDECL was different from + current_class_type as another way to get inside here. This didn't work + for String.cc in libg++. */ + if (DECL_FRIEND_P (fndecl)) + { + CLASSTYPE_INLINE_FRIENDS (current_class_type) + = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type)); + decl = void_type_node; + } + + return decl; +} + +/* Called when a new struct TYPE is defined. + If this structure or union completes the type of any previous + variable declaration, lay it out and output its rtl. */ + +void +hack_incomplete_structures (type) + tree type; +{ + tree decl; + + if (current_binding_level->n_incomplete == 0) + return; + + if (!type) /* Don't do this for class templates. */ + return; + + for (decl = current_binding_level->names; decl; decl = TREE_CHAIN (decl)) + if (TREE_TYPE (decl) == type + || (TREE_TYPE (decl) + && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE + && TREE_TYPE (TREE_TYPE (decl)) == type)) + { + if (TREE_CODE (decl) == TYPE_DECL) + layout_type (TREE_TYPE (decl)); + else + { + int toplevel = global_binding_level == current_binding_level; + if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE + && TREE_TYPE (TREE_TYPE (decl)) == type) + layout_type (TREE_TYPE (decl)); + layout_decl (decl, 0); + rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0); + if (! toplevel) + { + expand_decl (decl); + expand_decl_cleanup (decl, maybe_build_cleanup (decl)); + expand_decl_init (decl); + } + } + my_friendly_assert (current_binding_level->n_incomplete > 0, 164); + --current_binding_level->n_incomplete; + } +} + +/* Nonzero if presently building a cleanup. Needed because + SAVE_EXPRs are not the right things to use inside of cleanups. + They are only ever evaluated once, where the cleanup + might be evaluated several times. In this case, a later evaluation + of the cleanup might fill in the SAVE_EXPR_RTL, and it will + not be valid for an earlier cleanup. */ + +int building_cleanup; + +/* If DECL is of a type which needs a cleanup, build that cleanup here. + We don't build cleanups if just going for syntax checking, since + fixup_cleanups does not know how to not handle them. + + Don't build these on the momentary obstack; they must live + the life of the binding contour. */ +tree +maybe_build_cleanup (decl) + tree decl; +{ + tree type = TREE_TYPE (decl); + if (TYPE_NEEDS_DESTRUCTOR (type)) + { + int temp = 0, flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR; + tree rval; + int old_building_cleanup = building_cleanup; + building_cleanup = 1; + + if (TREE_CODE (decl) != PARM_DECL) + temp = suspend_momentary (); + + if (TREE_CODE (type) == ARRAY_TYPE) + rval = decl; + else + { + mark_addressable (decl); + rval = build_unary_op (ADDR_EXPR, decl, 0); + } + + /* Optimize for space over speed here. */ + if (! TYPE_USES_VIRTUAL_BASECLASSES (type) + || flag_expensive_optimizations) + flags |= LOOKUP_NONVIRTUAL; + + /* Use TYPE_MAIN_VARIANT so we don't get a warning about + calling delete on a `const' variable. */ + if (TYPE_READONLY (TREE_TYPE (TREE_TYPE (rval)))) + rval = build1 (NOP_EXPR, TYPE_POINTER_TO (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (rval)))), rval); + + rval = build_delete (TREE_TYPE (rval), rval, integer_two_node, flags, 0); + + if (TYPE_USES_VIRTUAL_BASECLASSES (type) + && ! TYPE_HAS_DESTRUCTOR (type)) + rval = build_compound_expr (tree_cons (NULL_TREE, rval, + build_tree_list (NULL_TREE, build_vbase_delete (type, decl)))); + + current_binding_level->have_cleanups = 1; + current_binding_level->more_exceptions_ok = 0; + + if (TREE_CODE (decl) != PARM_DECL) + resume_momentary (temp); + + building_cleanup = old_building_cleanup; + + return rval; + } + return 0; +} + +/* Expand a C++ expression at the statement level. + This is needed to ferret out nodes which have UNKNOWN_TYPE. + The C++ type checker should get all of these out when + expressions are combined with other, type-providing, expressions, + leaving only orphan expressions, such as: + + &class::bar; / / takes its address, but does nothing with it. + + */ +void +cplus_expand_expr_stmt (exp) + tree exp; +{ + if (TREE_TYPE (exp) == unknown_type_node) + { + if (TREE_CODE (exp) == ADDR_EXPR || TREE_CODE (exp) == TREE_LIST) + error ("address of overloaded function with no contextual type information"); + else if (TREE_CODE (exp) == COMPONENT_REF) + warning ("useless reference to a member function name, did you forget the ()?"); + } + else + { + int remove_implicit_immediately = 0; + + if (TREE_CODE (exp) == FUNCTION_DECL) + { + cp_warning ("reference, not call, to function `%D'", exp); + warning ("at this point in file"); + } + if (TREE_RAISES (exp)) + { + my_friendly_assert (flag_handle_exceptions, 165); + if (flag_handle_exceptions == 2) + { + if (! current_binding_level->more_exceptions_ok) + { + extern struct nesting *nesting_stack, *block_stack; + + remove_implicit_immediately + = (nesting_stack != block_stack); + cplus_expand_start_try (1); + } + current_binding_level->have_exceptions = 1; + } + } + + expand_expr_stmt (break_out_cleanups (exp)); + + if (remove_implicit_immediately) + pop_implicit_try_blocks (NULL_TREE); + } + + /* Clean up any pending cleanups. This happens when a function call + returns a cleanup-needing value that nobody uses. */ + expand_cleanups_to (NULL_TREE); +} + +/* When a stmt has been parsed, this function is called. + + Currently, this function only does something within a + constructor's scope: if a stmt has just assigned to this, + and we are in a derived class, we call `emit_base_init'. */ + +void +finish_stmt () +{ + extern struct nesting *cond_stack, *loop_stack, *case_stack; + + + if (current_function_assigns_this + || ! current_function_just_assigned_this) + return; + if (DECL_CONSTRUCTOR_P (current_function_decl)) + { + /* Constructors must wait until we are out of control + zones before calling base constructors. */ + if (cond_stack || loop_stack || case_stack) + return; + emit_insns (base_init_insns); + check_base_init (current_class_type); + } + current_function_assigns_this = 1; + + if (flag_cadillac) + cadillac_finish_stmt (); +} + +void +pop_implicit_try_blocks (decl) + tree decl; +{ + if (decl) + { + my_friendly_assert (current_binding_level->parm_flag == 3, 166); + current_binding_level->names = TREE_CHAIN (decl); + } + + while (current_binding_level->parm_flag == 3) + { + tree name = get_identifier ("(compiler error)"); + tree orig_ex_type = current_exception_type; + tree orig_ex_decl = current_exception_decl; + tree orig_ex_obj = current_exception_object; + tree decl = cplus_expand_end_try (2); + + /* @@ It would be nice to make all these point + to exactly the same handler. */ + /* Start hidden EXCEPT. */ + cplus_expand_start_except (name, decl); + /* reraise ALL. */ + cplus_expand_reraise (NULL_TREE); + current_exception_type = orig_ex_type; + current_exception_decl = orig_ex_decl; + current_exception_object = orig_ex_obj; + /* This will reraise for us. */ + cplus_expand_end_except (error_mark_node); + } + + if (decl) + { + TREE_CHAIN (decl) = current_binding_level->names; + current_binding_level->names = decl; + } +} + +/* Push a cleanup onto the current binding contour that will cause + ADDR to be cleaned up, in the case that an exception propagates + through its binding contour. */ + +void +push_exception_cleanup (addr) + tree addr; +{ + tree decl = build_decl (VAR_DECL, get_identifier (EXCEPTION_CLEANUP_NAME), ptr_type_node); + tree cleanup; + + decl = pushdecl (decl); + DECL_REGISTER (decl) = 1; + store_init_value (decl, addr); + expand_decl (decl); + expand_decl_init (decl); + + cleanup = build (COND_EXPR, integer_type_node, + build (NE_EXPR, integer_type_node, + decl, integer_zero_node), + build_delete (TREE_TYPE (addr), decl, + lookup_name (in_charge_identifier, 0), + LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0), + integer_zero_node); + expand_decl_cleanup (decl, cleanup); +} + +/* For each binding contour, emit code that deactivates the + exception cleanups. All other cleanups are left as they were. */ + +static void +deactivate_exception_cleanups () +{ + struct binding_level *b = current_binding_level; + tree xyzzy = get_identifier (EXCEPTION_CLEANUP_NAME); + while (b != class_binding_level) + { + if (b->parm_flag == 3) + { + tree decls = b->names; + while (decls) + { + if (DECL_NAME (decls) == xyzzy) + expand_assignment (decls, integer_zero_node, 0, 0); + decls = TREE_CHAIN (decls); + } + } + b = b->level_chain; + } +} + +/* Change a static member function definition into a FUNCTION_TYPE, instead + of the METHOD_TYPE that we create when it's originally parsed. */ +void +revert_static_member_fn (fn, decl, argtypes) + tree *fn, *decl, *argtypes; +{ + tree tmp, function = *fn; + + *argtypes = TREE_CHAIN (*argtypes); + tmp = build_function_type (TREE_TYPE (function), *argtypes); + tmp = build_type_variant (tmp, TYPE_READONLY (function), + TYPE_VOLATILE (function)); + tmp = build_exception_variant (TYPE_METHOD_BASETYPE (function), tmp, + TYPE_RAISES_EXCEPTIONS (function)); + TREE_TYPE (*decl) = tmp; + *fn = tmp; + DECL_STATIC_FUNCTION_P (*decl) = 1; +} diff --git a/gcc/cp/decl.h b/gcc/cp/decl.h new file mode 100644 index 0000000..aabfa2f --- /dev/null +++ b/gcc/cp/decl.h @@ -0,0 +1,59 @@ +/* Variables and structures for declaration processing. + Copyright (C) 1993 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* In grokdeclarator, distinguish syntactic contexts of declarators. */ +enum decl_context +{ NORMAL, /* Ordinary declaration */ + FUNCDEF, /* Function definition */ + PARM, /* Declaration of parm before function body */ + FIELD, /* Declaration inside struct or union */ + BITFIELD, /* Likewise but with specified width */ + TYPENAME, /* Typename (inside cast or sizeof) */ + MEMFUNCDEF /* Member function definition */ +}; + +/* C++: Keep these around to reduce calls to `get_identifier'. + Identifiers for `this' in member functions and the auto-delete + parameter for destructors. */ +extern tree this_identifier, in_charge_identifier; + +/* Parsing a function declarator leaves a list of parameter names + or a chain or parameter decls here. */ +extern tree last_function_parms; + +/* A list of static class variables. This is needed, because a + static class variable can be declared inside the class without + an initializer, and then initialized, staticly, outside the class. */ +extern tree pending_statics; + +/* A list of objects which have constructors or destructors + which reside in the global scope. The decl is stored in + the TREE_VALUE slot and the initializer is stored + in the TREE_PURPOSE slot. */ +extern tree static_aggregates; + +/* A list of functions which were declared inline, but later had their + address taken. Used only for non-virtual member functions, since we can + find other functions easily enough. */ +extern tree pending_addressable_inlines; + +#ifdef DEBUG_CP_BINDING_LEVELS +/* Purely for debugging purposes. */ +extern int debug_bindings_indentation; +#endif diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c new file mode 100644 index 0000000..201dcf7 --- /dev/null +++ b/gcc/cp/decl2.c @@ -0,0 +1,2823 @@ +/* Process declarations and variables for C compiler. + Copyright (C) 1988, 1992, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* Process declarations and symbol lookup for C front end. + Also constructs types; the standard scalar types at initialization, + and structure, union, array and enum types when they are declared. */ + +/* ??? not all decl nodes are given the most useful possible + line numbers. For example, the CONST_DECLs for enum values. */ + +#include "config.h" +#include <stdio.h> +#include "tree.h" +#include "rtl.h" +#include "flags.h" +#include "cp-tree.h" +#include "decl.h" +#include "lex.h" + +extern tree grokdeclarator (); +extern tree get_file_function_name (); +static void grok_function_init (); + +/* A list of virtual function tables we must make sure to write out. */ +tree pending_vtables; + +/* A list of static class variables. This is needed, because a + static class variable can be declared inside the class without + an initializer, and then initialized, staticly, outside the class. */ +tree pending_statics; + +extern tree pending_addressable_inlines; + +/* Used to help generate temporary names which are unique within + a function. Reset to 0 by start_function. */ + +static int temp_name_counter; + +/* Same, but not reset. Local temp variables and global temp variables + can have the same name. */ +static int global_temp_name_counter; + +/* Flag used when debugging cp-spew.c */ + +extern int spew_debug; + +/* C (and C++) language-specific option variables. */ + +/* Nonzero means allow type mismatches in conditional expressions; + just make their values `void'. */ + +int flag_cond_mismatch; + +/* Nonzero means give `double' the same size as `float'. */ + +int flag_short_double; + +/* Nonzero means don't recognize the keyword `asm'. */ + +int flag_no_asm; + +/* Nonzero means don't recognize the non-ANSI builtin functions. */ + +int flag_no_builtin; + +/* Nonzero means do some things the same way PCC does. */ + +int flag_traditional; + +/* Nonzero means to treat bitfields as unsigned unless they say `signed'. */ + +int flag_signed_bitfields = 1; + +/* Nonzero means handle `#ident' directives. 0 means ignore them. */ + +int flag_no_ident = 0; + +/* Nonzero means handle things in ANSI, instead of GNU fashion. This + flag should be tested for language behavior that's different between + ANSI and GNU, but not so horrible as to merit a PEDANTIC label. */ + +int flag_ansi = 0; + +/* Nonzero means do argument matching for overloading according to the + ANSI rules, rather than what g++ used to believe to be correct. */ + +int flag_ansi_overloading = 1; + +/* Nonzero means do emit exported implementations of functions even if + they can be inlined. */ + +int flag_implement_inlines = 1; + +/* Nonzero means do emit exported implementations of templates, instead of + multiple static copies in each file that needs a definition. */ + +int flag_external_templates = 0; + +/* Nonzero means that the decision to emit or not emit the implementation of a + template depends on where the template is instantiated, rather than where + it is defined. */ + +int flag_alt_external_templates = 0; + +/* Nonzero means warn about implicit declarations. */ + +int warn_implicit = 1; + +/* Nonzero means warn when all ctors or dtors are private, and the class + has no friends. */ + +int warn_ctor_dtor_privacy = 1; + +/* Nonzero means give string constants the type `const char *' + to get extra warnings from them. These warnings will be too numerous + to be useful, except in thoroughly ANSIfied programs. */ + +int warn_write_strings; + +/* Nonzero means warn about pointer casts that can drop a type qualifier + from the pointer target type. */ + +int warn_cast_qual; + +/* Nonzero means warn that dbx info for template class methods isn't fully + supported yet. */ + +int warn_template_debugging; + +/* Warn about traditional constructs whose meanings changed in ANSI C. */ + +int warn_traditional; + +/* Nonzero means warn about sizeof(function) or addition/subtraction + of function pointers. */ + +int warn_pointer_arith; + +/* Nonzero means warn for non-prototype function decls + or non-prototyped defs without previous prototype. */ + +int warn_strict_prototypes; + +/* Nonzero means warn for any function def without prototype decl. */ + +int warn_missing_prototypes; + +/* Nonzero means warn about multiple (redundant) decls for the same single + variable or function. */ + +int warn_redundant_decls; + +/* Warn if initializer is not completely bracketed. */ + +int warn_missing_braces; + +/* Warn about *printf or *scanf format/argument anomalies. */ + +int warn_format; + +/* Warn about a subscript that has type char. */ + +int warn_char_subscripts; + +/* Warn if a type conversion is done that might have confusing results. */ + +int warn_conversion; + +/* Warn if adding () is suggested. */ + +int warn_parentheses = 1; + +/* Non-zero means warn in function declared in derived class has the + same name as a virtual in the base class, but fails to match the + type signature of any virtual function in the base class. */ +int warn_overloaded_virtual; + +/* Non-zero means warn when declaring a class that has a non virtual + destructor, when it really ought to have a virtual one. */ +int warn_nonvdtor = 1; + +/* Non-zero means warn when a function is declared extern and later inline. */ +int warn_extern_inline; + +/* Nonzero means `$' can be in an identifier. + See cccp.c for reasons why this breaks some obscure ANSI C programs. */ + +#ifndef DOLLARS_IN_IDENTIFIERS +#define DOLLARS_IN_IDENTIFIERS 1 +#endif +int dollars_in_ident = DOLLARS_IN_IDENTIFIERS; + +/* Nonzero for -no-strict-prototype switch: do not consider empty + argument prototype to mean function takes no arguments. */ + +int strict_prototype = 1; +int strict_prototypes_lang_c, strict_prototypes_lang_cplusplus = 1; + +/* Nonzero means that labels can be used as first-class objects */ + +int flag_labels_ok; + +/* Non-zero means to collect statistics which might be expensive + and to print them when we are done. */ +int flag_detailed_statistics; + +/* C++ specific flags. */ +/* Nonzero for -fall-virtual: make every member function (except + constructors) lay down in the virtual function table. Calls + can then either go through the virtual function table or not, + depending. */ + +int flag_all_virtual; + +/* Zero means that `this' is a *const. This gives nice behavior in the + 2.0 world. 1 gives 1.2-compatible behavior. 2 gives Spring behavior. + -2 means we're constructing an object and it has fixed type. */ + +int flag_this_is_variable; + +/* Nonzero means memoize our member lookups. */ + +int flag_memoize_lookups; int flag_save_memoized_contexts; + +/* 3 means write out only virtuals function tables `defined' + in this implementation file. + 2 means write out only specific virtual function tables + and give them (C) public access. + 1 means write out virtual function tables and give them + (C) public access. + 0 means write out virtual function tables and give them + (C) static access (default). + -1 means declare virtual function tables extern. */ + +int write_virtuals; + +/* Nonzero means we should attempt to elide constructors when possible. */ + +int flag_elide_constructors; + +/* Nonzero means recognize and handle exception handling constructs. + 2 means handle exceptions the way Spring wants them handled. */ + +int flag_handle_exceptions; + +/* Nonzero means recognize and handle exception handling constructs. + Use ansi syntax and semantics. WORK IN PROGRESS! + 2 means handle exceptions the way Spring wants them handled. */ + +int flag_ansi_exceptions; + +/* Nonzero means recognize and handle signature language constructs. */ + +int flag_handle_signatures; + +/* Nonzero means that member functions defined in class scope are + inline by default. */ + +int flag_default_inline = 1; + +/* Controls whether enums and ints freely convert. + 1 means with complete freedom. + 0 means enums can convert to ints, but not vice-versa. */ +int flag_int_enum_equivalence; + +/* Controls whether compiler is operating under LUCID's Cadillac + system. 1 means yes, 0 means no. */ +int flag_cadillac; + +/* Controls whether compiler generates code to build objects + that can be collected when they become garbage. */ +int flag_gc; + +/* Controls whether compiler generates 'dossiers' that give + run-time type information. */ +int flag_dossier; + +/* Nonzero if we wish to output cross-referencing information + for the GNU class browser. */ +extern int flag_gnu_xref; + +/* Nonzero if compiler can make `reasonable' assumptions about + references and objects. For example, the compiler must be + conservative about the following and not assume that `a' is nonnull: + + obj &a = g (); + a.f (2); + + In general, it is `reasonable' to assume that for many programs, + and better code can be generated in that case. */ + +int flag_assume_nonnull_objects; + +/* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes) + objects. */ +int flag_huge_objects; + +/* Nonzero if we want to conserve space in the .o files. We do this + by putting uninitialized data and runtime initialized data into + .common instead of .data at the expense of not flaging multiple + definitions. */ +int flag_conserve_space; + +/* Table of language-dependent -f options. + STRING is the option name. VARIABLE is the address of the variable. + ON_VALUE is the value to store in VARIABLE + if `-fSTRING' is seen as an option. + (If `-fno-STRING' is seen as an option, the opposite value is stored.) */ + +static struct { char *string; int *variable; int on_value;} lang_f_options[] = +{ + {"signed-char", &flag_signed_char, 1}, + {"unsigned-char", &flag_signed_char, 0}, + {"signed-bitfields", &flag_signed_bitfields, 1}, + {"unsigned-bitfields", &flag_signed_bitfields, 0}, + {"short-enums", &flag_short_enums, 1}, + {"short-double", &flag_short_double, 1}, + {"cond-mismatch", &flag_cond_mismatch, 1}, + {"asm", &flag_no_asm, 0}, + {"builtin", &flag_no_builtin, 0}, + {"ident", &flag_no_ident, 0}, + {"labels-ok", &flag_labels_ok, 1}, + {"stats", &flag_detailed_statistics, 1}, + {"this-is-variable", &flag_this_is_variable, 1}, + {"strict-prototype", &strict_prototypes_lang_cplusplus, 1}, + {"all-virtual", &flag_all_virtual, 1}, + {"memoize-lookups", &flag_memoize_lookups, 1}, + {"elide-constructors", &flag_elide_constructors, 1}, + {"handle-exceptions", &flag_handle_exceptions, 1}, + {"ansi-exceptions", &flag_ansi_exceptions, 1}, + {"handle-signatures", &flag_handle_signatures, 1}, + {"spring-exceptions", &flag_handle_exceptions, 2}, + {"default-inline", &flag_default_inline, 1}, + {"dollars-in-identifiers", &dollars_in_ident, 1}, + {"enum-int-equiv", &flag_int_enum_equivalence, 1}, + {"gc", &flag_gc, 1}, + {"dossier", &flag_dossier, 1}, + {"xref", &flag_gnu_xref, 1}, + {"nonnull-objects", &flag_assume_nonnull_objects, 1}, + {"implement-inlines", &flag_implement_inlines, 1}, + {"external-templates", &flag_external_templates, 1}, + {"ansi-overloading", &flag_ansi_overloading, 1}, + {"huge-objects", &flag_huge_objects, 1}, + {"conserve-space", &flag_conserve_space, 1}, +}; + +/* Decode the string P as a language-specific option. + Return 1 if it is recognized (and handle it); + return 0 if not recognized. */ + +int +lang_decode_option (p) + char *p; +{ + if (!strcmp (p, "-ftraditional") || !strcmp (p, "-traditional")) + flag_traditional = 1, dollars_in_ident = 1, flag_writable_strings = 1, + flag_this_is_variable = 1; + /* The +e options are for cfront compatibility. They come in as + `-+eN', to kludge around gcc.c's argument handling. */ + else if (p[0] == '-' && p[1] == '+' && p[2] == 'e') + { + int old_write_virtuals = write_virtuals; + if (p[3] == '1') + write_virtuals = 1; + else if (p[3] == '0') + write_virtuals = -1; + else if (p[3] == '2') + write_virtuals = 2; + else error ("invalid +e option"); + if (old_write_virtuals != 0 + && write_virtuals != old_write_virtuals) + error ("conflicting +e options given"); + } + else if (p[0] == '-' && p[1] == 'f') + { + /* Some kind of -f option. + P's value is the option sans `-f'. + Search for it in the table of options. */ + int found = 0, j; + + p += 2; + /* Try special -f options. */ + + if (!strcmp (p, "save-memoized")) + { + flag_memoize_lookups = 1; + flag_save_memoized_contexts = 1; + found = 1; + } + if (!strcmp (p, "no-save-memoized")) + { + flag_memoize_lookups = 0; + flag_save_memoized_contexts = 0; + found = 1; + } + else if (! strncmp (p, "cadillac", 8)) + { + flag_cadillac = atoi (p+9); + found = 1; + } + else if (! strncmp (p, "no-cadillac", 11)) + { + flag_cadillac = 0; + found = 1; + } + else if (! strcmp (p, "gc")) + { + flag_gc = 1; + /* This must come along for the ride. */ + flag_dossier = 1; + found = 1; + } + else if (! strcmp (p, "no-gc")) + { + flag_gc = 0; + /* This must come along for the ride. */ + flag_dossier = 0; + found = 1; + } + else if (! strcmp (p, "alt-external-templates")) + { + flag_external_templates = 1; + flag_alt_external_templates = 1; + found = 1; + } + else if (! strcmp (p, "no-alt-external-templates")) + { + flag_alt_external_templates = 0; + found = 1; + } + else for (j = 0; + !found && j < sizeof (lang_f_options) / sizeof (lang_f_options[0]); + j++) + { + if (!strcmp (p, lang_f_options[j].string)) + { + *lang_f_options[j].variable = lang_f_options[j].on_value; + /* A goto here would be cleaner, + but breaks the vax pcc. */ + found = 1; + } + if (p[0] == 'n' && p[1] == 'o' && p[2] == '-' + && ! strcmp (p+3, lang_f_options[j].string)) + { + *lang_f_options[j].variable = ! lang_f_options[j].on_value; + found = 1; + } + } + return found; + } + else if (p[0] == '-' && p[1] == 'W') + { + int setting = 1; + + /* The -W options control the warning behavior of the compiler. */ + p += 2; + + if (p[0] == 'n' && p[1] == 'o' && p[2] == '-') + setting = 0, p += 3; + + if (!strcmp (p, "implicit")) + warn_implicit = setting; + else if (!strcmp (p, "return-type")) + warn_return_type = setting; + else if (!strcmp (p, "ctor-dtor-privacy")) + warn_ctor_dtor_privacy = setting; + else if (!strcmp (p, "write-strings")) + warn_write_strings = setting; + else if (!strcmp (p, "cast-qual")) + warn_cast_qual = setting; + else if (!strcmp (p, "traditional")) + warn_traditional = setting; + else if (!strcmp (p, "char-subscripts")) + warn_char_subscripts = setting; + else if (!strcmp (p, "pointer-arith")) + warn_pointer_arith = setting; + else if (!strcmp (p, "strict-prototypes")) + warn_strict_prototypes = setting; + else if (!strcmp (p, "missing-prototypes")) + warn_missing_prototypes = setting; + else if (!strcmp (p, "redundant-decls")) + warn_redundant_decls = setting; + else if (!strcmp (p, "missing-braces")) + warn_missing_braces = setting; + else if (!strcmp (p, "format")) + warn_format = setting; + else if (!strcmp (p, "conversion")) + warn_conversion = setting; + else if (!strcmp (p, "parentheses")) + warn_parentheses = setting; + else if (!strcmp (p, "extern-inline")) + warn_extern_inline = setting; + else if (!strcmp (p, "comment")) + ; /* cpp handles this one. */ + else if (!strcmp (p, "comments")) + ; /* cpp handles this one. */ + else if (!strcmp (p, "trigraphs")) + ; /* cpp handles this one. */ + else if (!strcmp (p, "import")) + ; /* cpp handles this one. */ + else if (!strcmp (p, "all")) + { + extra_warnings = setting; + warn_return_type = setting; + warn_unused = setting; + warn_implicit = setting; + warn_ctor_dtor_privacy = setting; + warn_switch = setting; + warn_format = setting; + warn_missing_braces = setting; + warn_extern_inline = setting; + /* We save the value of warn_uninitialized, since if they put + -Wuninitialized on the command line, we need to generate a + warning about not using it without also specifying -O. */ + if (warn_uninitialized != 1) + warn_uninitialized = (setting ? 2 : 0); + warn_template_debugging = setting; + } + + else if (!strcmp (p, "overloaded-virtual")) + warn_overloaded_virtual = setting; + else return 0; + } + else if (!strcmp (p, "-ansi")) + flag_no_asm = 1, dollars_in_ident = 0, flag_ansi = 1; +#ifdef SPEW_DEBUG + /* Undocumented, only ever used when you're invoking cc1plus by hand, since + it's probably safe to assume no sane person would ever want to use this + under normal circumstances. */ + else if (!strcmp (p, "-spew-debug")) + spew_debug = 1; +#endif + else + return 0; + + return 1; +} + +/* Incorporate `const' and `volatile' qualifiers for member functions. + FUNCTION is a TYPE_DECL or a FUNCTION_DECL. + QUALS is a list of qualifiers. */ +tree +grok_method_quals (ctype, function, quals) + tree ctype, function, quals; +{ + tree fntype = TREE_TYPE (function); + tree raises = TYPE_RAISES_EXCEPTIONS (fntype); + + do + { + extern tree ridpointers[]; + + if (TREE_VALUE (quals) == ridpointers[(int)RID_CONST]) + { + if (TYPE_READONLY (ctype)) + error ("duplicate `%s' %s", + IDENTIFIER_POINTER (TREE_VALUE (quals)), + (TREE_CODE (function) == FUNCTION_DECL + ? "for member function" : "in type declaration")); + ctype = build_type_variant (ctype, 1, TYPE_VOLATILE (ctype)); + build_pointer_type (ctype); + } + else if (TREE_VALUE (quals) == ridpointers[(int)RID_VOLATILE]) + { + if (TYPE_VOLATILE (ctype)) + error ("duplicate `%s' %s", + IDENTIFIER_POINTER (TREE_VALUE (quals)), + (TREE_CODE (function) == FUNCTION_DECL + ? "for member function" : "in type declaration")); + ctype = build_type_variant (ctype, TYPE_READONLY (ctype), 1); + build_pointer_type (ctype); + } + else + my_friendly_abort (20); + quals = TREE_CHAIN (quals); + } + while (quals); + fntype = build_cplus_method_type (ctype, TREE_TYPE (fntype), + (TREE_CODE (fntype) == METHOD_TYPE + ? TREE_CHAIN (TYPE_ARG_TYPES (fntype)) + : TYPE_ARG_TYPES (fntype))); + if (raises) + fntype = build_exception_variant (ctype, fntype, raises); + + TREE_TYPE (function) = fntype; + return ctype; +} + +/* This routine replaces cryptic DECL_NAMEs with readable DECL_NAMEs. + It leaves DECL_ASSEMBLER_NAMEs with the correct value. */ +/* This does not yet work with user defined conversion operators + It should. */ +static void +substitute_nice_name (decl) + tree decl; +{ + if (DECL_NAME (decl) && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE) + { + char *n = decl_as_string (DECL_NAME (decl), 1); + if (n[strlen (n) - 1] == ' ') + n[strlen (n) - 1] = 0; + DECL_NAME (decl) = get_identifier (n); + } +} + +/* Warn when -fexternal-templates is used and #pragma + interface/implementation is not used all the times it should be, + inform the user. */ +void +warn_if_unknown_interface () +{ + static int already_warned = 0; + if (++already_warned == 1) + warning ("templates that are built with -fexternal-templates should be in files that have #pragma interface/implementation"); +} + +/* A subroutine of the parser, to handle a component list. */ +tree +grok_x_components (specs, components) + tree specs, components; +{ + register tree t, x, tcode; + + /* We just got some friends. They have been recorded elsewhere. */ + if (components == void_type_node) + return NULL_TREE; + + if (components == NULL_TREE) + { + t = groktypename (build_decl_list (specs, NULL_TREE)); + + if (t == NULL_TREE) + { + error ("error in component specification"); + return NULL_TREE; + } + + switch (TREE_CODE (t)) + { + case VAR_DECL: + /* Static anonymous unions come out as VAR_DECLs. */ + if (TREE_CODE (TREE_TYPE (t)) == UNION_TYPE + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (TREE_TYPE (t)))) + return t; + + /* We return SPECS here, because in the parser it was ending + up with not doing anything to $$, which is what SPECS + represents. */ + return specs; + break; + + case RECORD_TYPE: + /* This code may be needed for UNION_TYPEs as + well. */ + tcode = record_type_node; + if (CLASSTYPE_DECLARED_CLASS(t)) + tcode = class_type_node; + else if (IS_SIGNATURE(t)) + tcode = signature_type_node; + else if (CLASSTYPE_DECLARED_EXCEPTION(t)) + tcode = exception_type_node; + + t = xref_defn_tag(tcode, TYPE_IDENTIFIER(t), NULL_TREE); + if (TYPE_CONTEXT(t)) + CLASSTYPE_NO_GLOBALIZE(t) = 1; + if (TYPE_LANG_SPECIFIC (t) + && CLASSTYPE_DECLARED_EXCEPTION (t)) + shadow_tag (specs); + return NULL_TREE; + break; + + case UNION_TYPE: + case ENUMERAL_TYPE: + if (TREE_CODE(t) == UNION_TYPE) + tcode = union_type_node; + else + tcode = enum_type_node; + + t = xref_defn_tag(tcode, TYPE_IDENTIFIER(t), NULL_TREE); + if (TREE_CODE(t) == UNION_TYPE && TYPE_CONTEXT(t)) + CLASSTYPE_NO_GLOBALIZE(t) = 1; + if (TREE_CODE (t) == UNION_TYPE + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))) + { + struct pending_inline **p; + x = build_lang_field_decl (FIELD_DECL, NULL_TREE, t); + + /* Wipe out memory of synthesized methods */ + TYPE_HAS_CONSTRUCTOR (t) = 0; + TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0; + TYPE_HAS_INIT_REF (t) = 0; + TYPE_HAS_CONST_INIT_REF (t) = 0; + TYPE_HAS_ASSIGN_REF (t) = 0; + TYPE_HAS_ASSIGNMENT (t) = 0; + TYPE_HAS_CONST_ASSIGN_REF (t) = 0; + + p = &pending_inlines; + for (; *p; *p = (*p)->next) + if (DECL_CONTEXT ((*p)->fndecl) != t) + break; + } + else if (TREE_CODE (t) == ENUMERAL_TYPE) + x = grok_enum_decls (t, NULL_TREE); + else + x = NULL_TREE; + return x; + break; + + default: + if (t != void_type_node) + error ("empty component declaration"); + return NULL_TREE; + } + } + else + { + t = TREE_TYPE (components); + if (TREE_CODE (t) == ENUMERAL_TYPE && TREE_NONLOCAL_FLAG (t)) + return grok_enum_decls (t, components); + else + return components; + } +} + +/* Classes overload their constituent function names automatically. + When a function name is declared in a record structure, + its name is changed to it overloaded name. Since names for + constructors and destructors can conflict, we place a leading + '$' for destructors. + + CNAME is the name of the class we are grokking for. + + FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'. + + FLAGS contains bits saying what's special about today's + arguments. 1 == DESTRUCTOR. 2 == OPERATOR. + + If FUNCTION is a destructor, then we must add the `auto-delete' field + as a second parameter. There is some hair associated with the fact + that we must "declare" this variable in the manner consistent with the + way the rest of the arguments were declared. + + QUALS are the qualifiers for the this pointer. */ + +void +grokclassfn (ctype, cname, function, flags, quals) + tree ctype, cname, function; + enum overload_flags flags; + tree quals; +{ + tree fn_name = DECL_NAME (function); + tree arg_types; + tree parm; + + if (fn_name == NULL_TREE) + { + error ("name missing for member function"); + fn_name = get_identifier ("<anonymous>"); + DECL_NAME (function) = fn_name; + } + + if (quals) + ctype = grok_method_quals (ctype, function, quals); + + arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); + if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE) + { + /* Must add the class instance variable up front. */ + /* Right now we just make this a pointer. But later + we may wish to make it special. */ + tree type = TREE_VALUE (arg_types); + + if (flags == DTOR_FLAG) + type = TYPE_MAIN_VARIANT (type); + else if (DECL_CONSTRUCTOR_P (function)) + { + if (TYPE_USES_VIRTUAL_BASECLASSES (ctype)) + { + DECL_CONSTRUCTOR_FOR_VBASE_P (function) = 1; + /* In this case we need "in-charge" flag saying whether + this constructor is responsible for initialization + of virtual baseclasses or not. */ + parm = build_decl (PARM_DECL, in_charge_identifier, integer_type_node); + /* Mark the artificial `__in_chrg' parameter as "artificial". */ + DECL_SOURCE_LINE (parm) = 0; + DECL_ARG_TYPE (parm) = integer_type_node; + DECL_REGISTER (parm) = 1; + TREE_CHAIN (parm) = last_function_parms; + last_function_parms = parm; + } + } + + parm = build_decl (PARM_DECL, this_identifier, type); + /* Mark the artificial `this' parameter as "artificial". */ + DECL_SOURCE_LINE (parm) = 0; + DECL_ARG_TYPE (parm) = type; + /* We can make this a register, so long as we don't + accidentally complain if someone tries to take its address. */ + DECL_REGISTER (parm) = 1; +#if 0 + /* it is wrong to flag the object as readonly, when + flag_this_is_variable is 0. */ + if (flags != DTOR_FLAG + && (flag_this_is_variable <= 0 || TYPE_READONLY (type))) +#else + if (flags != DTOR_FLAG && TYPE_READONLY (type)) +#endif + TREE_READONLY (parm) = 1; + TREE_CHAIN (parm) = last_function_parms; + last_function_parms = parm; + } + + if (flags == DTOR_FLAG) + { + char *buf, *dbuf; + tree const_integer_type = build_type_variant (integer_type_node, 1, 0); + int len = sizeof (DESTRUCTOR_DECL_PREFIX)-1; + + arg_types = hash_tree_chain (const_integer_type, void_list_node); + TREE_SIDE_EFFECTS (arg_types) = 1; + /* Build the overload name. It will look like `7Example'. */ + if (IDENTIFIER_TYPE_VALUE (cname)) + dbuf = build_overload_name (IDENTIFIER_TYPE_VALUE (cname), 1, 1); + else if (IDENTIFIER_LOCAL_VALUE (cname)) + dbuf = build_overload_name (TREE_TYPE (IDENTIFIER_LOCAL_VALUE (cname)), 1, 1); + else + /* Using ctype fixes the `X::Y::~Y()' crash. The cname has no type when + it's defined out of the class definition, since poplevel_class wipes + it out. This used to be internal error 346. */ + dbuf = build_overload_name (ctype, 1, 1); + buf = (char *) alloca (strlen (dbuf) + sizeof (DESTRUCTOR_DECL_PREFIX)); + bcopy (DESTRUCTOR_DECL_PREFIX, buf, len); + buf[len] = '\0'; + strcat (buf, dbuf); + DECL_ASSEMBLER_NAME (function) = get_identifier (buf); + parm = build_decl (PARM_DECL, in_charge_identifier, const_integer_type); + /* Mark the artificial `__in_chrg' parameter as "artificial". */ + DECL_SOURCE_LINE (parm) = 0; + TREE_USED (parm) = 1; +#if 0 + /* We don't need to mark the __in_chrg parameter itself as `const' + since its type is already `const int'. In fact we MUST NOT mark + it as `const' cuz that will screw up the debug info (causing it + to say that the type of __in_chrg is `const const int'). */ + TREE_READONLY (parm) = 1; +#endif + DECL_ARG_TYPE (parm) = const_integer_type; + /* This is the same chain as DECL_ARGUMENTS (...). */ + TREE_CHAIN (last_function_parms) = parm; + + TREE_TYPE (function) = build_cplus_method_type (ctype, void_type_node, + arg_types); + TYPE_HAS_DESTRUCTOR (ctype) = 1; + } + else + { + tree these_arg_types; + + if (DECL_CONSTRUCTOR_FOR_VBASE_P (function)) + { + arg_types = hash_tree_chain (integer_type_node, + TREE_CHAIN (arg_types)); + TREE_TYPE (function) + = build_cplus_method_type (ctype, + TREE_TYPE (TREE_TYPE (function)), + arg_types); + arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); + } + + these_arg_types = arg_types; + + if (TREE_CODE (TREE_TYPE (function)) == FUNCTION_TYPE) + /* Only true for static member functions. */ + these_arg_types = hash_tree_chain (TYPE_POINTER_TO (ctype), arg_types); + + DECL_ASSEMBLER_NAME (function) + = build_decl_overload (fn_name, these_arg_types, + 1 + DECL_CONSTRUCTOR_P (function)); + +#if 0 + /* This code is going into the compiler, but currently, it makes + libg++/src/Interger.cc not compile. The problem is that the nice name + winds up going into the symbol table, and conversion operations look + for the manged name. */ + substitute_nice_name (function); +#endif + } + + DECL_ARGUMENTS (function) = last_function_parms; + /* First approximations. */ + DECL_CONTEXT (function) = ctype; + DECL_CLASS_CONTEXT (function) = ctype; +} + +/* Work on the expr used by alignof (this is only called by the parser). */ +tree +grok_alignof (expr) + tree expr; +{ + tree best, t; + int bestalign; + + if (TREE_CODE (expr) == COMPONENT_REF + && DECL_BIT_FIELD (TREE_OPERAND (expr, 1))) + error ("`__alignof__' applied to a bit-field"); + + if (TREE_CODE (expr) == INDIRECT_REF) + { + best = t = TREE_OPERAND (expr, 0); + bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); + + while (TREE_CODE (t) == NOP_EXPR + && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) + { + int thisalign; + t = TREE_OPERAND (t, 0); + thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); + if (thisalign > bestalign) + best = t, bestalign = thisalign; + } + return c_alignof (TREE_TYPE (TREE_TYPE (best))); + } + else + { + /* ANSI says arrays and fns are converted inside comma. + But we can't convert them in build_compound_expr + because that would break commas in lvalues. + So do the conversion here if operand was a comma. */ + if (TREE_CODE (expr) == COMPOUND_EXPR + && (TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE)) + expr = default_conversion (expr); + return c_alignof (TREE_TYPE (expr)); + } +} + +/* Create an ARRAY_REF, checking for the user doing things backwards + along the way. */ +tree +grok_array_decl (array_expr, index_exp) + tree array_expr, index_exp; +{ + tree type = TREE_TYPE (array_expr); + + if (type == error_mark_node || index_exp == error_mark_node) + return error_mark_node; + if (type == NULL_TREE) + { + /* Something has gone very wrong. Assume we are mistakenly reducing + an expression instead of a declaration. */ + error ("parser may be lost: is there a '{' missing somewhere?"); + return NULL_TREE; + } + + if (TREE_CODE (type) == OFFSET_TYPE + || TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + /* If they have an `operator[]', use that. */ + if (TYPE_LANG_SPECIFIC (type) + && TYPE_OVERLOADS_ARRAY_REF (type)) + return build_opfncall (ARRAY_REF, LOOKUP_NORMAL, + array_expr, index_exp, NULL_TREE); + + /* Otherwise, create an ARRAY_REF for a pointer or array type. */ + if (TREE_CODE (type) == POINTER_TYPE + || TREE_CODE (type) == ARRAY_TYPE) + return build_array_ref (array_expr, index_exp); + + /* Woops, looks like they did something like `5[a]' instead of `a[5]'. + We don't emit a warning or error for this, since it's allowed + by ARM $8.2.4. */ + + type = TREE_TYPE (index_exp); + + if (TREE_CODE (type) == OFFSET_TYPE + || TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + if (TYPE_LANG_SPECIFIC (type) + && TYPE_OVERLOADS_ARRAY_REF (type)) + error ("array expression backwards"); + else if (TREE_CODE (type) == POINTER_TYPE + || TREE_CODE (type) == ARRAY_TYPE) + return build_array_ref (index_exp, array_expr); + else + error("`[]' applied to non-pointer type"); + + /* We gave an error, so give an error. Huh? */ + return error_mark_node; +} + +/* Given the cast expression EXP, checking out its validity. Either return + an error_mark_node if there was an unavoidable error, return a cast to + void for trying to delete a pointer w/ the value 0, or return the + call to delete. If DOING_VEC is 1, we handle things differently + for doing an array delete. If DOING_VEC is 2, they gave us the + array size as an argument to delete. + Implements ARM $5.3.4. This is called from the parser. */ +tree +delete_sanity (exp, size, doing_vec, use_global_delete) + tree exp, size; + int doing_vec, use_global_delete; +{ + tree t = stabilize_reference (convert_from_reference (exp)); + tree type = TREE_TYPE (t); + enum tree_code code = TREE_CODE (type); + /* For a regular vector delete (aka, no size argument) we will pass + this down as a NULL_TREE into build_vec_delete. */ + tree maxindex = NULL_TREE; + /* This is used for deleting arrays. */ + tree elt_size; + + switch (doing_vec) + { + case 2: + maxindex = build_binary_op (MINUS_EXPR, size, integer_one_node, 1); + if (! flag_traditional) + pedwarn ("ANSI C++ forbids array size in vector delete"); + /* Fall through. */ + case 1: + elt_size = c_sizeof (type); + break; + default: + if (code != POINTER_TYPE) + { + cp_error ("type `%#T' argument given to `delete', expected pointer", + type); + return error_mark_node; + } + + /* Deleting a pointer with the value zero is legal and has no effect. */ + if (integer_zerop (t)) + return build1 (NOP_EXPR, void_type_node, t); + } + + /* You can't delete a pointer to constant. */ + if (code == POINTER_TYPE && TREE_READONLY (TREE_TYPE (type))) + { + error ("`const *' cannot be deleted"); + return error_mark_node; + } + + /* If the type has no destructor, then we should build a regular + delete, instead of a vector delete. Otherwise, we would end + up passing a bogus offset into __builtin_delete, which is + not expecting it. */ + if (doing_vec + && TREE_CODE (type) == POINTER_TYPE + && !TYPE_HAS_DESTRUCTOR (TREE_TYPE (type))) + doing_vec = 0; + + if (doing_vec) + return build_vec_delete (t, maxindex, elt_size, NULL_TREE, + integer_one_node, integer_two_node); + else + return build_delete (type, t, integer_three_node, + LOOKUP_NORMAL|LOOKUP_HAS_IN_CHARGE, + use_global_delete + || TYPE_HAS_DESTRUCTOR (TREE_TYPE (type))); +} + +/* Sanity check: report error if this function FUNCTION is not + really a member of the class (CTYPE) it is supposed to belong to. + CNAME is the same here as it is for grokclassfn above. */ + +void +check_classfn (ctype, cname, function) + tree ctype, cname, function; +{ + tree fn_name = DECL_NAME (function); + tree fndecl; + int need_quotes = 0; + tree method_vec = CLASSTYPE_METHOD_VEC (ctype); + tree *methods = 0; + tree *end = 0; + + if (method_vec != 0) + { + methods = &TREE_VEC_ELT (method_vec, 0); + end = TREE_VEC_END (method_vec); + + /* First suss out ctors and dtors. */ + if (*methods && fn_name == cname) + goto got_it; + + while (++methods != end) + { + if (fn_name == DECL_NAME (*methods)) + { + got_it: + fndecl = *methods; + while (fndecl) + { + if (DECL_ASSEMBLER_NAME (function) == DECL_ASSEMBLER_NAME (fndecl)) + return; + fndecl = DECL_CHAIN (fndecl); + } + break; /* loser */ + } + } + } + + if (methods != end) + cp_error ("argument list for `%D' does not match any in class `%T'", + fn_name, ctype); + else + { + methods = 0; + cp_error ("no `%D' member function declared in class `%T'", + fn_name, ctype); + } + + /* If we did not find the method in the class, add it to + avoid spurious errors. */ + add_method (ctype, methods, function); +} + +/* Process the specs, declarator (NULL if omitted) and width (NULL if omitted) + of a structure component, returning a FIELD_DECL node. + QUALS is a list of type qualifiers for this decl (such as for declaring + const member functions). + + This is done during the parsing of the struct declaration. + The FIELD_DECL nodes are chained together and the lot of them + are ultimately passed to `build_struct' to make the RECORD_TYPE node. + + C++: + + If class A defines that certain functions in class B are friends, then + the way I have set things up, it is B who is interested in permission + granted by A. However, it is in A's context that these declarations + are parsed. By returning a void_type_node, class A does not attempt + to incorporate the declarations of the friends within its structure. + + DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING + CHANGES TO CODE IN `start_method'. */ + +tree +grokfield (declarator, declspecs, raises, init, asmspec_tree) + tree declarator, declspecs, raises, init, asmspec_tree; +{ + register tree value; + char *asmspec = 0; + + /* Convert () initializers to = initializers. */ + if (init == NULL_TREE && declarator != NULL_TREE + && TREE_CODE (declarator) == CALL_EXPR + && TREE_OPERAND (declarator, 0) + && (TREE_CODE (TREE_OPERAND (declarator, 0)) == IDENTIFIER_NODE + || TREE_CODE (TREE_OPERAND (declarator, 0)) == SCOPE_REF) + && parmlist_is_exprlist (TREE_OPERAND (declarator, 1))) + { + init = TREE_OPERAND (declarator, 1); + declarator = TREE_OPERAND (declarator, 0); + } + + if (init + && TREE_CODE (init) == TREE_LIST + && TREE_VALUE (init) == error_mark_node + && TREE_CHAIN (init) == NULL_TREE) + init = NULL_TREE; + + value = grokdeclarator (declarator, declspecs, FIELD, init != 0, raises); + if (! value) + return NULL_TREE; /* friends went bad. */ + + /* Pass friendly classes back. */ + if (TREE_CODE (value) == VOID_TYPE) + return void_type_node; + + if (DECL_NAME (value) != NULL_TREE + && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_' + && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr")) + cp_error ("member `%D' conflicts with virtual function table field name", value); + + /* Stash away type declarations. */ + if (TREE_CODE (value) == TYPE_DECL) + { + DECL_NONLOCAL (value) = 1; + CLASSTYPE_LOCAL_TYPEDECLS (current_class_type) = 1; + pushdecl_class_level (value); + return value; + } + + if (IS_SIGNATURE (current_class_type) + && TREE_CODE (value) != FUNCTION_DECL) + { + error ("field declaration not allowed in signature"); + return void_type_node; + } + + if (DECL_IN_AGGR_P (value)) + { + cp_error ("`%D' is already defined in the class %T", value, + DECL_CONTEXT (value)); + return void_type_node; + } + + if (flag_cadillac) + cadillac_start_decl (value); + + if (asmspec_tree) + asmspec = TREE_STRING_POINTER (asmspec_tree); + + if (init) + { + if (IS_SIGNATURE (current_class_type) + && TREE_CODE (value) == FUNCTION_DECL) + { + error ("function declarations cannot have initializers in signature"); + init = NULL_TREE; + } + else if (TREE_CODE (value) == FUNCTION_DECL) + { + grok_function_init (value, init); + init = NULL_TREE; + } + else if (pedantic) + { + if (DECL_NAME (value)) + pedwarn ("ANSI C++ forbids initialization of member `%s'", + IDENTIFIER_POINTER (DECL_NAME (value))); + else + pedwarn ("ANSI C++ forbids initialization of fields"); + + init = NULL_TREE; + } + else + { + /* We allow initializers to become parameters to base initializers. */ + if (TREE_CODE (init) == TREE_LIST) + { + if (TREE_CHAIN (init) == NULL_TREE) + init = TREE_VALUE (init); + else + init = digest_init (TREE_TYPE (value), init, (tree *)0); + } + + if (TREE_CODE (init) == CONST_DECL) + init = DECL_INITIAL (init); + else if (TREE_READONLY_DECL_P (init)) + init = decl_constant_value (init); + else if (TREE_CODE (init) == CONSTRUCTOR) + init = digest_init (TREE_TYPE (value), init, (tree *)0); + my_friendly_assert (TREE_PERMANENT (init), 192); + if (init == error_mark_node) + /* We must make this look different than `error_mark_node' + because `decl_const_value' would mis-interpret it + as only meaning that this VAR_DECL is defined. */ + init = build1 (NOP_EXPR, TREE_TYPE (value), init); + else if (! TREE_CONSTANT (init)) + { + /* We can allow references to things that are effectively + static, since references are initialized with the address. */ + if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE + || (TREE_STATIC (init) == 0 + && (TREE_CODE_CLASS (TREE_CODE (init)) != 'd' + || DECL_EXTERNAL (init) == 0))) + { + error ("field initializer is not constant"); + init = error_mark_node; + } + } + } + } + + /* The corresponding pop_obstacks is in finish_decl. */ + push_obstacks_nochange (); + + if (TREE_CODE (value) == VAR_DECL) + { + /* We cannot call pushdecl here, because that would + fill in the value of our TREE_CHAIN. Instead, we + modify finish_decl to do the right thing, namely, to + put this decl out straight away. */ + if (TREE_STATIC (value)) + { + /* current_class_type can be NULL_TREE in case of error. */ + if (asmspec == 0 && current_class_type) + { + tree name; + char *buf, *buf2; + + buf2 = build_overload_name (current_class_type, 1, 1); + buf = (char *)alloca (IDENTIFIER_LENGTH (DECL_NAME (value)) + + sizeof (STATIC_NAME_FORMAT) + + strlen (buf2)); + sprintf (buf, STATIC_NAME_FORMAT, buf2, + IDENTIFIER_POINTER (DECL_NAME (value))); + name = get_identifier (buf); + TREE_PUBLIC (value) = 1; + DECL_INITIAL (value) = error_mark_node; + DECL_ASSEMBLER_NAME (value) = name; + } + pending_statics = perm_tree_cons (NULL_TREE, value, pending_statics); + + /* Static consts need not be initialized in the class definition. */ + if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (value))) + { + static int explanation = 0; + + error ("initializer invalid for static member with constructor"); + if (explanation++ == 0) + error ("(you really want to initialize it separately)"); + init = 0; + } + /* Force the compiler to know when an uninitialized static + const member is being used. */ + if (TYPE_READONLY (value) && init == 0) + TREE_USED (value) = 1; + } + DECL_INITIAL (value) = init; + DECL_IN_AGGR_P (value) = 1; + + finish_decl (value, init, asmspec_tree, 1); + pushdecl_class_level (value); + return value; + } + if (TREE_CODE (value) == FIELD_DECL) + { + if (asmspec) + DECL_ASSEMBLER_NAME (value) = get_identifier (asmspec); + if (DECL_INITIAL (value) == error_mark_node) + init = error_mark_node; + finish_decl (value, init, asmspec_tree, 1); + DECL_INITIAL (value) = init; + DECL_IN_AGGR_P (value) = 1; + return value; + } + if (TREE_CODE (value) == FUNCTION_DECL) + { + /* grokdeclarator defers setting this. */ + TREE_PUBLIC (value) = 1; + if (DECL_CHAIN (value) != NULL_TREE) + { + /* Need a fresh node here so that we don't get circularity + when we link these together. */ + value = copy_node (value); + /* When does this happen? */ + my_friendly_assert (init == NULL_TREE, 193); + } + finish_decl (value, init, asmspec_tree, 1); + + /* Pass friends back this way. */ + if (DECL_FRIEND_P (value)) + return void_type_node; + + DECL_IN_AGGR_P (value) = 1; + return value; + } + my_friendly_abort (21); + /* NOTREACHED */ + return NULL_TREE; +} + +/* Like `grokfield', but for bitfields. + WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */ + +tree +grokbitfield (declarator, declspecs, width) + tree declarator, declspecs, width; +{ + register tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL_TREE); + + if (! value) return NULL_TREE; /* friends went bad. */ + + /* Pass friendly classes back. */ + if (TREE_CODE (value) == VOID_TYPE) + return void_type_node; + + if (TREE_CODE (value) == TYPE_DECL) + { + cp_error ("cannot declare `%D' to be a bitfield type", value); + return NULL_TREE; + } + + if (IS_SIGNATURE (current_class_type)) + { + error ("field declaration not allowed in signature"); + return void_type_node; + } + + if (DECL_IN_AGGR_P (value)) + { + cp_error ("`%D' is already defined in the class %T", value, + DECL_CONTEXT (value)); + return void_type_node; + } + + GNU_xref_member (current_class_name, value); + + if (TREE_STATIC (value)) + { + cp_error ("static member `%D' cannot be a bitfield", value); + return NULL_TREE; + } + finish_decl (value, NULL_TREE, NULL_TREE, 0); + + if (width != error_mark_node) + { + /* detect invalid field size. */ + if (TREE_CODE (width) == CONST_DECL) + width = DECL_INITIAL (width); + else if (TREE_READONLY_DECL_P (width)) + width = decl_constant_value (width); + if (TREE_CODE (width) != INTEGER_CST) + { + cp_error ("structure field `%D' width not an integer constant", + value); + DECL_INITIAL (value) = NULL_TREE; + } + else + { + constant_expression_warning (width); + DECL_INITIAL (value) = width; + DECL_BIT_FIELD (value) = 1; + } + } + + DECL_IN_AGGR_P (value) = 1; + return value; +} + +/* Like GROKFIELD, except that the declarator has been + buried in DECLSPECS. Find the declarator, and + return something that looks like it came from + GROKFIELD. */ +tree +groktypefield (declspecs, parmlist) + tree declspecs; + tree parmlist; +{ + tree spec = declspecs; + tree prev = NULL_TREE; + + tree type_id = NULL_TREE; + tree quals = NULL_TREE; + tree lengths = NULL_TREE; + tree decl = NULL_TREE; + + while (spec) + { + register tree id = TREE_VALUE (spec); + + if (TREE_CODE (spec) != TREE_LIST) + /* Certain parse errors slip through. For example, + `int class ();' is not caught by the parser. Try + weakly to recover here. */ + return NULL_TREE; + + if (TREE_CODE (id) == TYPE_DECL + || (TREE_CODE (id) == IDENTIFIER_NODE && TREE_TYPE (id))) + { + /* We have a constructor/destructor or + conversion operator. Use it. */ + if (prev) + TREE_CHAIN (prev) = TREE_CHAIN (spec); + else + declspecs = TREE_CHAIN (spec); + + type_id = id; + goto found; + } + prev = spec; + spec = TREE_CHAIN (spec); + } + + /* Nope, we have a conversion operator to a scalar type or something + else, that includes things like constructor declarations for + templates. */ + spec = declspecs; + while (spec) + { + tree id = TREE_VALUE (spec); + + if (TREE_CODE (id) == IDENTIFIER_NODE) + { + if (id == ridpointers[(int)RID_INT] + || id == ridpointers[(int)RID_DOUBLE] + || id == ridpointers[(int)RID_FLOAT] + || id == ridpointers[(int)RID_WCHAR]) + { + if (type_id) + error ("extra `%s' ignored", + IDENTIFIER_POINTER (id)); + else + type_id = id; + } + else if (id == ridpointers[(int)RID_LONG] + || id == ridpointers[(int)RID_SHORT] + || id == ridpointers[(int)RID_CHAR]) + { + lengths = tree_cons (NULL_TREE, id, lengths); + } + else if (id == ridpointers[(int)RID_VOID]) + { + if (type_id) + error ("spurious `void' type ignored"); + else + error ("conversion to `void' type invalid"); + } + else if (id == ridpointers[(int)RID_AUTO] + || id == ridpointers[(int)RID_REGISTER] + || id == ridpointers[(int)RID_TYPEDEF] + || id == ridpointers[(int)RID_CONST] + || id == ridpointers[(int)RID_VOLATILE]) + { + error ("type specifier `%s' used invalidly", + IDENTIFIER_POINTER (id)); + } + else if (id == ridpointers[(int)RID_FRIEND] + || id == ridpointers[(int)RID_VIRTUAL] + || id == ridpointers[(int)RID_INLINE] + || id == ridpointers[(int)RID_UNSIGNED] + || id == ridpointers[(int)RID_SIGNED] + || id == ridpointers[(int)RID_STATIC] + || id == ridpointers[(int)RID_EXTERN]) + { + quals = tree_cons (NULL_TREE, id, quals); + } + else + { + /* Happens when we have a global typedef + and a class-local member function with + the same name. */ + type_id = id; + goto found; + } + } + else if (TREE_CODE (id) == RECORD_TYPE) + { + type_id = TYPE_NAME (id); + if (TREE_CODE (type_id) == TYPE_DECL) + type_id = DECL_NAME (type_id); + if (type_id == NULL_TREE) + error ("identifier for aggregate type conversion omitted"); + } + else if (TREE_CODE_CLASS (TREE_CODE (id)) == 't') + error ("`operator' missing on conversion operator or tag missing from type"); + else + my_friendly_abort (194); + spec = TREE_CHAIN (spec); + } + + if (type_id) + declspecs = chainon (lengths, quals); + else if (lengths) + { + if (TREE_CHAIN (lengths)) + error ("multiple length specifiers"); + type_id = ridpointers[(int)RID_INT]; + declspecs = chainon (lengths, quals); + } + else if (quals) + { + error ("no type given, defaulting to `operator int ...'"); + type_id = ridpointers[(int)RID_INT]; + declspecs = quals; + } + else + return NULL_TREE; + + found: + decl = grokdeclarator (build_parse_node (CALL_EXPR, type_id, parmlist, NULL_TREE), + declspecs, FIELD, 0, NULL_TREE); + if (decl == NULL_TREE) + return NULL_TREE; + + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_CHAIN (decl) != NULL_TREE) + { + /* Need a fresh node here so that we don't get circularity + when we link these together. */ + decl = copy_node (decl); + } + + if (decl == void_type_node + || (TREE_CODE (decl) == FUNCTION_DECL + && TREE_CODE (TREE_TYPE (decl)) != METHOD_TYPE)) + /* bunch of friends. */ + return decl; + + if (DECL_IN_AGGR_P (decl)) + { + cp_error ("`%D' already defined in the class ", decl); + return void_type_node; + } + + finish_decl (decl, NULL_TREE, NULL_TREE, 0); + + /* If this declaration is common to another declaration + complain about such redundancy, and return NULL_TREE + so that we don't build a circular list. */ + if (DECL_CHAIN (decl)) + { + cp_error ("function `%D' declared twice in class %T", decl, + DECL_CONTEXT (decl)); + return NULL_TREE; + } + DECL_IN_AGGR_P (decl) = 1; + return decl; +} + +/* The precedence rules of this grammar (or any other deterministic LALR + grammar, for that matter), place the CALL_EXPR somewhere where we + may not want it. The solution is to grab the first CALL_EXPR we see, + pretend that that is the one that belongs to the parameter list of + the type conversion function, and leave everything else alone. + We pull it out in place. + + CALL_REQUIRED is non-zero if we should complain if a CALL_EXPR + does not appear in DECL. */ +tree +grokoptypename (decl, call_required) + tree decl; + int call_required; +{ + tree tmp, last; + + my_friendly_assert (TREE_CODE (decl) == TYPE_EXPR, 195); + + tmp = TREE_OPERAND (decl, 0); + last = NULL_TREE; + + while (tmp) + { + switch (TREE_CODE (tmp)) + { + case CALL_EXPR: + { + tree parms = TREE_OPERAND (tmp, 1); + + if (last) + TREE_OPERAND (last, 0) = TREE_OPERAND (tmp, 0); + else + TREE_OPERAND (decl, 0) = TREE_OPERAND (tmp, 0); + + last = grokdeclarator (TREE_OPERAND (decl, 0), + TREE_TYPE (decl), + TYPENAME, 0, NULL_TREE); + TREE_OPERAND (tmp, 0) = build_typename_overload (last); + TREE_TYPE (TREE_OPERAND (tmp, 0)) = last; + + if (parms + && TREE_CODE (TREE_VALUE (parms)) == TREE_LIST) + TREE_VALUE (parms) + = grokdeclarator (TREE_VALUE (TREE_VALUE (parms)), + TREE_PURPOSE (TREE_VALUE (parms)), + TYPENAME, 0, NULL_TREE); + if (parms) + { + if (TREE_VALUE (parms) != void_type_node) + cp_error ("`operator %T' requires empty parameter list", + last); + else + /* Canonicalize parameter lists. */ + TREE_OPERAND (tmp, 1) = void_list_node; + } + + return tmp; + } + + case INDIRECT_REF: + case ADDR_EXPR: + case ARRAY_REF: + break; + + case SCOPE_REF: + /* This is legal when declaring a conversion to + something of type pointer-to-member. */ + if (TREE_CODE (TREE_OPERAND (tmp, 1)) == INDIRECT_REF) + { + tmp = TREE_OPERAND (tmp, 1); + } + else + { +#if 0 + /* We may need to do this if grokdeclarator cannot handle this. */ + error ("type `member of class %s' invalid return type", + TYPE_NAME_STRING (TREE_OPERAND (tmp, 0))); + TREE_OPERAND (tmp, 1) = build_parse_node (INDIRECT_REF, TREE_OPERAND (tmp, 1)); +#endif + tmp = TREE_OPERAND (tmp, 1); + } + break; + + default: + my_friendly_abort (196); + } + last = tmp; + tmp = TREE_OPERAND (tmp, 0); + } + + last = grokdeclarator (TREE_OPERAND (decl, 0), + TREE_TYPE (decl), + TYPENAME, 0, NULL_TREE); + + if (call_required) + cp_error ("`operator %T' construct requires parameter list", last); + + tmp = build_parse_node (CALL_EXPR, build_typename_overload (last), + void_list_node, NULL_TREE); + TREE_TYPE (TREE_OPERAND (tmp, 0)) = last; + return tmp; +} + +/* When a function is declared with an initializer, + do the right thing. Currently, there are two possibilities: + + class B + { + public: + // initialization possibility #1. + virtual void f () = 0; + int g (); + }; + + class D1 : B + { + public: + int d1; + // error, no f (); + }; + + class D2 : B + { + public: + int d2; + void f (); + }; + + class D3 : B + { + public: + int d3; + // initialization possibility #2 + void f () = B::f; + }; + +*/ + +static void +grok_function_init (decl, init) + tree decl; + tree init; +{ + /* An initializer for a function tells how this function should + be inherited. */ + tree type = TREE_TYPE (decl); + extern tree abort_fndecl; + + if (TREE_CODE (type) == FUNCTION_TYPE) + cp_error ("initializer specified for non-member function `%D'", decl); + else if (DECL_VINDEX (decl) == NULL_TREE) + cp_error ("initializer specified for non-virtual method `%D'", decl); + else if (integer_zerop (init)) + { + /* Mark this function as being "defined". */ + DECL_INITIAL (decl) = error_mark_node; + /* pure virtual destructors must be defined. */ + if (!DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl))) + { + /* Give this node rtl from `abort'. */ + DECL_RTL (decl) = DECL_RTL (abort_fndecl); + } + DECL_ABSTRACT_VIRTUAL_P (decl) = 1; + } + else if (TREE_CODE (init) == OFFSET_REF + && TREE_OPERAND (init, 0) == NULL_TREE + && TREE_CODE (TREE_TYPE (init)) == METHOD_TYPE) + { + tree basetype = DECL_CLASS_CONTEXT (init); + tree basefn = TREE_OPERAND (init, 1); + if (TREE_CODE (basefn) != FUNCTION_DECL) + cp_error ("non-method initializer invalid for method `%D'", decl); + else if (! BINFO_OFFSET_ZEROP (TYPE_BINFO (DECL_CLASS_CONTEXT (basefn)))) + sorry ("base member function from other than first base class"); + else + { + tree binfo = get_binfo (basetype, TYPE_METHOD_BASETYPE (type), 1); + if (binfo == error_mark_node) + ; + else if (binfo == 0) + error_not_base_type (TYPE_METHOD_BASETYPE (TREE_TYPE (init)), + TYPE_METHOD_BASETYPE (type)); + else + { + /* Mark this function as being defined, + and give it new rtl. */ + DECL_INITIAL (decl) = error_mark_node; + DECL_RTL (decl) = DECL_RTL (basefn); + } + } + } + else + cp_error ("invalid initializer for virtual method `%D'", decl); +} + +/* When we get a declaration of the form + + type cname::fname ... + + the node for `cname::fname' gets built here in a special way. + Namely, we push into `cname's scope. When this declaration is + processed, we pop back out. */ +tree +build_push_scope (cname, name) + tree cname; + tree name; +{ + extern int current_class_depth; + tree ctype, rval; + int is_ttp = 0; + + if (cname == error_mark_node) + return error_mark_node; + + ctype = IDENTIFIER_TYPE_VALUE (cname); + + if (TREE_CODE (ctype) == TEMPLATE_TYPE_PARM) + is_ttp = 1; + else if (ctype == NULL_TREE || ! IS_AGGR_TYPE (ctype)) + { + cp_error ("`%T' not defined as aggregate type", cname); + return name; + } + else if (IS_SIGNATURE (ctype)) + { + error ("cannot push into signature scope, scope resolution operator ignored"); + return name; + } + + rval = build_parse_node (SCOPE_REF, cname, name); + + /* Don't need to push the scope if we're already in it. + We also don't need to push the scope for a ptr-to-member/method. */ + + if (ctype == current_class_type || TREE_CODE (name) != IDENTIFIER_NODE + || is_ttp) + return rval; + + /* We do need to push the scope in this case, since CTYPE helps + determine subsequent intializers (i.e., Foo::Bar x = foo_enum_1;). */ + + push_nested_class (ctype, 3); + TREE_COMPLEXITY (rval) = current_class_depth; + return rval; +} + +void cplus_decl_attributes (decl, attributes) + tree decl, attributes; +{ + if (decl) + decl_attributes (decl, attributes); +} + +/* CONSTRUCTOR_NAME: + Return the name for the constructor (or destructor) for the + specified class. Argument can be RECORD_TYPE, TYPE_DECL, or + IDENTIFIER_NODE. When given a template, this routine doesn't + lose the specialization. */ +tree +constructor_name_full (thing) + tree thing; +{ + tree t; + if (TREE_CODE (thing) == UNINSTANTIATED_P_TYPE) + return DECL_NAME (UPT_TEMPLATE (thing)); + if (IS_AGGR_TYPE_CODE (TREE_CODE (thing))) + { + if (TYPE_WAS_ANONYMOUS (thing) && TYPE_HAS_CONSTRUCTOR (thing)) + thing = DECL_NAME (TREE_VEC_ELT (TYPE_METHODS (thing), 0)); + else + thing = TYPE_NAME (thing); + } + if (TREE_CODE (thing) == TYPE_DECL + || (TREE_CODE (thing) == TEMPLATE_DECL + && DECL_TEMPLATE_IS_CLASS (thing))) + thing = DECL_NAME (thing); + my_friendly_assert (TREE_CODE (thing) == IDENTIFIER_NODE, 197); + return thing; +} + +/* CONSTRUCTOR_NAME: + Return the name for the constructor (or destructor) for the + specified class. Argument can be RECORD_TYPE, TYPE_DECL, or + IDENTIFIER_NODE. When given a template, return the plain + unspecialized name. */ +tree +constructor_name (thing) + tree thing; +{ + tree t; + thing = constructor_name_full (thing); + t = IDENTIFIER_TEMPLATE (thing); + if (!t) + return thing; + t = TREE_PURPOSE (t); + return DECL_NAME (t); +} + +/* Cache the value of this class's main virtual function table pointer + in a register variable. This will save one indirection if a + more than one virtual function call is made this function. */ +void +setup_vtbl_ptr () +{ + extern rtx base_init_insns; + + if (base_init_insns == 0 + && DECL_CONSTRUCTOR_P (current_function_decl)) + emit_base_init (current_class_type, 0); + +#if 0 + /* This has something a little wrong with it. + + On a sun4, code like: + + be L6 + ld [%i0],%o1 + + is generated, when the below is used when -O4 is given. The delay + slot it filled with an instruction that is safe, when this isn't + used, like in: + + be L6 + sethi %hi(LC1),%o0 + ld [%i0],%o1 + + on code like: + + struct A { + virtual void print() { printf("xxx"); } + void f(); + }; + + void A::f() { + if (this) { + print(); + } else { + printf("0"); + } + } + + And that is why this is disabled for now. (mrs) + */ + + if ((flag_this_is_variable & 1) == 0 + && optimize + && current_class_type + && CLASSTYPE_VSIZE (current_class_type) + && ! DECL_STATIC_FUNCTION_P (current_function_decl)) + { + tree vfield = build_vfield_ref (C_C_D, current_class_type); + current_vtable_decl = CLASSTYPE_VTBL_PTR (current_class_type); + DECL_RTL (current_vtable_decl) = 0; + DECL_INITIAL (current_vtable_decl) = error_mark_node; + /* Have to cast the initializer, since it may have come from a + more base class then we ascribe CURRENT_VTABLE_DECL to be. */ + finish_decl (current_vtable_decl, convert_force (TREE_TYPE (current_vtable_decl), vfield), 0, 0); + current_vtable_decl = build_indirect_ref (current_vtable_decl, NULL_PTR); + } + else +#endif + current_vtable_decl = NULL_TREE; +} + +/* Record the existence of an addressable inline function. */ +void +mark_inline_for_output (decl) + tree decl; +{ + if (DECL_PENDING_INLINE_INFO (decl) != 0 + && ! DECL_PENDING_INLINE_INFO (decl)->deja_vu) + { + struct pending_inline *t = pending_inlines; + my_friendly_assert (DECL_SAVED_INSNS (decl) == 0, 198); + while (t) + { + if (t == DECL_PENDING_INLINE_INFO (decl)) + break; + t = t->next; + } + if (t == 0) + { + t = DECL_PENDING_INLINE_INFO (decl); + t->next = pending_inlines; + pending_inlines = t; + } + DECL_PENDING_INLINE_INFO (decl) = 0; + } + pending_addressable_inlines = perm_tree_cons (NULL_TREE, decl, + pending_addressable_inlines); +} + +void +clear_temp_name () +{ + temp_name_counter = 0; +} + +/* Hand off a unique name which can be used for variable we don't really + want to know about anyway, for example, the anonymous variables which + are needed to make references work. Declare this thing so we can use it. + The variable created will be of type TYPE. + + STATICP is nonzero if this variable should be static. */ + +tree +get_temp_name (type, staticp) + tree type; + int staticp; +{ + char buf[sizeof (AUTO_TEMP_FORMAT) + 20]; + tree decl; + int toplev = global_bindings_p (); + + push_obstacks_nochange (); + if (toplev || staticp) + { + end_temporary_allocation (); + sprintf (buf, AUTO_TEMP_FORMAT, global_temp_name_counter++); + decl = pushdecl_top_level (build_decl (VAR_DECL, get_identifier (buf), type)); + } + else + { + sprintf (buf, AUTO_TEMP_FORMAT, temp_name_counter++); + decl = pushdecl (build_decl (VAR_DECL, get_identifier (buf), type)); + } + TREE_USED (decl) = 1; + TREE_STATIC (decl) = staticp; + + /* If this is a local variable, then lay out its rtl now. + Otherwise, callers of this function are responsible for dealing + with this variable's rtl. */ + if (! toplev) + { + expand_decl (decl); + expand_decl_init (decl); + } + pop_obstacks (); + + return decl; +} + +/* Get a variable which we can use for multiple assignments. + It is not entered into current_binding_level, because + that breaks things when it comes time to do final cleanups + (which take place "outside" the binding contour of the function). */ +tree +get_temp_regvar (type, init) + tree type, init; +{ + static char buf[sizeof (AUTO_TEMP_FORMAT) + 20] = { '_' }; + tree decl; + + sprintf (buf+1, AUTO_TEMP_FORMAT, temp_name_counter++); + decl = build_decl (VAR_DECL, get_identifier (buf), type); + TREE_USED (decl) = 1; + DECL_REGISTER (decl) = 1; + + if (init) + store_init_value (decl, init); + + /* We can expand these without fear, since they cannot need + constructors or destructors. */ + expand_decl (decl); + expand_decl_init (decl); + + if (type_needs_gc_entry (type)) + DECL_GC_OFFSET (decl) = size_int (++current_function_obstack_index); + + return decl; +} + +/* Make the macro TEMP_NAME_P available to units which do not + include c-tree.h. */ +int +temp_name_p (decl) + tree decl; +{ + return TEMP_NAME_P (decl); +} + +/* Finish off the processing of a UNION_TYPE structure. + If there are static members, then all members are + static, and must be laid out together. If the + union is an anonymous union, we arrange for that + as well. PUBLIC_P is nonzero if this union is + not declared static. */ +void +finish_anon_union (anon_union_decl) + tree anon_union_decl; +{ + tree type = TREE_TYPE (anon_union_decl); + tree field, main_decl = NULL_TREE; + tree elems = NULL_TREE; + int public_p = TREE_PUBLIC (anon_union_decl); + int static_p = TREE_STATIC (anon_union_decl); + int external_p = DECL_EXTERNAL (anon_union_decl); + + if ((field = TYPE_FIELDS (type)) == NULL_TREE) + return; + + if (public_p) + { + error ("global anonymous unions must be declared static"); + return; + } + + while (field) + { + tree decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field)); + /* tell `pushdecl' that this is not tentative. */ + DECL_INITIAL (decl) = error_mark_node; + TREE_PUBLIC (decl) = public_p; + TREE_STATIC (decl) = static_p; + DECL_EXTERNAL (decl) = external_p; + decl = pushdecl (decl); + + /* Only write out one anon union element--choose the one that + can hold them all. */ + if (main_decl == NULL_TREE + && simple_cst_equal (DECL_SIZE (decl), DECL_SIZE (anon_union_decl))) + { + main_decl = decl; + } + else + { + /* ??? This causes there to be no debug info written out + about this decl. */ + TREE_ASM_WRITTEN (decl) = 1; + } + + DECL_INITIAL (decl) = NULL_TREE; + /* If there's a cleanup to do, it belongs in the + TREE_PURPOSE of the following TREE_LIST. */ + elems = tree_cons (NULL_TREE, decl, elems); + TREE_TYPE (elems) = type; + field = TREE_CHAIN (field); + } + if (static_p) + { + make_decl_rtl (main_decl, 0, global_bindings_p ()); + DECL_RTL (anon_union_decl) = DECL_RTL (main_decl); + } + + /* The following call assumes that there are never any cleanups + for anonymous unions--a reasonable assumption. */ + expand_anon_union_decl (anon_union_decl, NULL_TREE, elems); + + if (flag_cadillac) + cadillac_finish_anon_union (anon_union_decl); +} + +/* Finish and output a table which is generated by the compiler. + NAME is the name to give the table. + TYPE is the type of the table entry. + INIT is all the elements in the table. + PUBLICP is non-zero if this table should be given external access. */ +tree +finish_table (name, type, init, publicp) + tree name, type, init; + int publicp; +{ + tree itype, atype, decl; + static tree empty_table; + int is_empty = 0; + tree asmspec; + + itype = build_index_type (size_int (list_length (init) - 1)); + atype = build_cplus_array_type (type, itype); + layout_type (atype); + + if (TREE_VALUE (init) == integer_zero_node + && TREE_CHAIN (init) == NULL_TREE) + { + if (empty_table == NULL_TREE) + { + empty_table = get_temp_name (atype, 1); + init = build (CONSTRUCTOR, atype, NULL_TREE, init); + TREE_CONSTANT (init) = 1; + TREE_STATIC (init) = 1; + DECL_INITIAL (empty_table) = init; + asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (empty_table)), + IDENTIFIER_POINTER (DECL_NAME (empty_table))); + finish_decl (empty_table, init, asmspec, 0); + } + is_empty = 1; + } + + if (name == NULL_TREE) + { + if (is_empty) + return empty_table; + decl = get_temp_name (atype, 1); + } + else + { + decl = build_decl (VAR_DECL, name, atype); + decl = pushdecl (decl); + TREE_STATIC (decl) = 1; + } + + if (is_empty == 0) + { + TREE_PUBLIC (decl) = publicp; + init = build (CONSTRUCTOR, atype, NULL_TREE, init); + TREE_CONSTANT (init) = 1; + TREE_STATIC (init) = 1; + DECL_INITIAL (decl) = init; + asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (decl)), + IDENTIFIER_POINTER (DECL_NAME (decl))); + } + else + { + /* This will cause DECL to point to EMPTY_TABLE in rtl-land. */ + DECL_EXTERNAL (decl) = 1; + TREE_STATIC (decl) = 0; + init = 0; + asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (empty_table)), + IDENTIFIER_POINTER (DECL_NAME (empty_table))); + } + + finish_decl (decl, init, asmspec, 0); + return decl; +} + +/* Finish processing a builtin type TYPE. It's name is NAME, + its fields are in the array FIELDS. LEN is the number of elements + in FIELDS minus one, or put another way, it is the maximum subscript + used in FIELDS. + + It is given the same alignment as ALIGN_TYPE. */ +void +finish_builtin_type (type, name, fields, len, align_type) + tree type; + char *name; + tree fields[]; + int len; + tree align_type; +{ + register int i; + + TYPE_FIELDS (type) = fields[0]; + for (i = 0; i < len; i++) + { + layout_type (TREE_TYPE (fields[i])); + DECL_FIELD_CONTEXT (fields[i]) = type; + TREE_CHAIN (fields[i]) = fields[i+1]; + } + DECL_FIELD_CONTEXT (fields[i]) = type; + DECL_CLASS_CONTEXT (fields[i]) = type; + TYPE_ALIGN (type) = TYPE_ALIGN (align_type); + layout_type (type); +#if 0 /* not yet, should get fixed properly later */ + TYPE_NAME (type) = make_type_decl (get_identifier (name), type); +#else + TYPE_NAME (type) = build_decl (TYPE_DECL, get_identifier (name), type); +#endif + layout_decl (TYPE_NAME (type), 0); +} + +/* Auxiliary functions to make type signatures for + `operator new' and `operator delete' correspond to + what compiler will be expecting. */ + +extern tree sizetype; + +tree +coerce_new_type (type) + tree type; +{ + int e1 = 0, e2 = 0; + + if (TREE_CODE (type) == METHOD_TYPE) + type = build_function_type (TREE_TYPE (type), TREE_CHAIN (TYPE_ARG_TYPES (type))); + if (TREE_TYPE (type) != ptr_type_node) + e1 = 1, error ("`operator new' must return type `void *'"); + + /* Technically the type must be `size_t', but we may not know + what that is. */ + if (TYPE_ARG_TYPES (type) == NULL_TREE) + e1 = 1, error ("`operator new' takes type `size_t' parameter"); + else if (TREE_CODE (TREE_VALUE (TYPE_ARG_TYPES (type))) != INTEGER_TYPE + || TYPE_PRECISION (TREE_VALUE (TYPE_ARG_TYPES (type))) != TYPE_PRECISION (sizetype)) + e2 = 1, error ("`operator new' takes type `size_t' as first parameter"); + if (e2) + type = build_function_type (ptr_type_node, tree_cons (NULL_TREE, sizetype, TREE_CHAIN (TYPE_ARG_TYPES (type)))); + else if (e1) + type = build_function_type (ptr_type_node, TYPE_ARG_TYPES (type)); + return type; +} + +tree +coerce_delete_type (type) + tree type; +{ + int e1 = 0, e2 = 0, e3 = 0; + tree arg_types = TYPE_ARG_TYPES (type); + + if (TREE_CODE (type) == METHOD_TYPE) + { + type = build_function_type (TREE_TYPE (type), TREE_CHAIN (arg_types)); + arg_types = TREE_CHAIN (arg_types); + } + if (TREE_TYPE (type) != void_type_node) + e1 = 1, error ("`operator delete' must return type `void'"); + if (arg_types == NULL_TREE + || TREE_VALUE (arg_types) != ptr_type_node) + e2 = 1, error ("`operator delete' takes type `void *' as first parameter"); + + if (arg_types + && TREE_CHAIN (arg_types) + && TREE_CHAIN (arg_types) != void_list_node) + { + /* Again, technically this argument must be `size_t', but again + we may not know what that is. */ + tree t2 = TREE_VALUE (TREE_CHAIN (arg_types)); + if (TREE_CODE (t2) != INTEGER_TYPE + || TYPE_PRECISION (t2) != TYPE_PRECISION (sizetype)) + e3 = 1, error ("second argument to `operator delete' must be of type `size_t'"); + else if (TREE_CHAIN (TREE_CHAIN (arg_types)) != void_list_node) + { + e3 = 1; + if (TREE_CHAIN (TREE_CHAIN (arg_types))) + error ("too many arguments in declaration of `operator delete'"); + else + error ("`...' invalid in specification of `operator delete'"); + } + } + if (e3) + arg_types = tree_cons (NULL_TREE, ptr_type_node, build_tree_list (NULL_TREE, sizetype)); + else if (e3 |= e2) + { + if (arg_types == NULL_TREE) + arg_types = void_list_node; + else + arg_types = tree_cons (NULL_TREE, ptr_type_node, TREE_CHAIN (arg_types)); + } + else e3 |= e1; + + if (e3) + type = build_function_type (void_type_node, arg_types); + + return type; +} + +static void +write_vtable_entries (decl) + tree decl; +{ + tree entries = TREE_CHAIN (CONSTRUCTOR_ELTS (DECL_INITIAL (decl))); + + if (flag_dossier) + entries = TREE_CHAIN (entries); + + for (; entries; entries = TREE_CHAIN (entries)) + { + tree fnaddr = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (entries)); + tree fn = TREE_OPERAND (fnaddr, 0); + if (! DECL_EXTERNAL (fn) && ! TREE_ASM_WRITTEN (fn) + && DECL_SAVED_INSNS (fn)) + { + if (TREE_PUBLIC (DECL_CLASS_CONTEXT (fn))) + TREE_PUBLIC (fn) = 1; + TREE_ADDRESSABLE (fn) = 1; + temporary_allocation (); + output_inline_function (fn); + permanent_allocation (); + } + else + assemble_external (fn); + } +} + +/* Note even though prev is never used in here, walk_vtables + expects this to have two arguments, so concede. */ +static void +finish_vtable_typedecl (prev, vars) + tree prev, vars; +{ + tree decl = TYPE_BINFO_VTABLE (TREE_TYPE (vars)); + + /* If we are controlled by `+e2', obey. */ + if (write_virtuals == 2) + { + tree binfo = value_member (DECL_NAME (vars), pending_vtables); + if (binfo) + TREE_PURPOSE (binfo) = void_type_node; + else + decl = NULL_TREE; + } + /* If this type has inline virtual functions, then + write those functions out now. */ + if (decl && write_virtuals >= 0 + && ! DECL_EXTERNAL (decl) && (TREE_PUBLIC (decl) || TREE_USED (decl))) + write_vtable_entries (decl); +} + +static void +finish_vtable_vardecl (prev, vars) + tree prev, vars; +{ + if (write_virtuals >= 0 + && ! DECL_EXTERNAL (vars) && (TREE_PUBLIC (vars) || TREE_USED (vars))) + { + extern tree the_null_vtable_entry; + + /* Stuff this virtual function table's size into + `pfn' slot of `the_null_vtable_entry'. */ + tree nelts = array_type_nelts (TREE_TYPE (vars)); + SET_FNADDR_FROM_VTABLE_ENTRY (the_null_vtable_entry, nelts); + /* Kick out the dossier before writing out the vtable. */ + if (flag_dossier) + rest_of_decl_compilation (TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (TREE_CHAIN (CONSTRUCTOR_ELTS (DECL_INITIAL (vars))))), 0), 0, 1, 1); + + /* Write it out. */ + write_vtable_entries (vars); + if (TREE_TYPE (DECL_INITIAL (vars)) == 0) + store_init_value (vars, DECL_INITIAL (vars)); + +#ifdef DWARF_DEBUGGING_INFO + if (write_symbols == DWARF_DEBUG) + { + /* Mark the VAR_DECL node representing the vtable itself as a + "gratuitous" one, thereby forcing dwarfout.c to ignore it. + It is rather important that such things be ignored because + any effort to actually generate DWARF for them will run + into trouble when/if we encounter code like: + + #pragma interface + struct S { virtual void member (); }; + + because the artificial declaration of the vtable itself (as + manufactured by the g++ front end) will say that the vtable + is a static member of `S' but only *after* the debug output + for the definition of `S' has already been output. This causes + grief because the DWARF entry for the definition of the vtable + will try to refer back to an earlier *declaration* of the + vtable as a static member of `S' and there won't be one. + We might be able to arrange to have the "vtable static member" + attached to the member list for `S' before the debug info for + `S' get written (which would solve the problem) but that would + require more intrusive changes to the g++ front end. */ + + DECL_IGNORED_P (vars) = 1; + } +#endif /* DWARF_DEBUGGING_INFO */ + + rest_of_decl_compilation (vars, 0, 1, 1); + } + /* We know that PREV must be non-zero here. */ + TREE_CHAIN (prev) = TREE_CHAIN (vars); +} + +void +walk_vtables (typedecl_fn, vardecl_fn) + register void (*typedecl_fn)(); + register void (*vardecl_fn)(); +{ + tree prev, vars; + + for (prev = 0, vars = getdecls (); vars; vars = TREE_CHAIN (vars)) + { + register tree type = TREE_TYPE (vars); + + if (TREE_CODE (vars) == TYPE_DECL + && type != error_mark_node + && TYPE_LANG_SPECIFIC (type) + && CLASSTYPE_VSIZE (type)) + { + if (typedecl_fn) (*typedecl_fn) (prev, vars); + } + else if (TREE_CODE (vars) == VAR_DECL && DECL_VIRTUAL_P (vars)) + { + if (vardecl_fn) (*vardecl_fn) (prev, vars); + } + else + prev = vars; + } +} + +extern int parse_time, varconst_time; + +#define TIMEVAR(VAR, BODY) \ +do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0) + +/* This routine is called from the last rule in yyparse (). + Its job is to create all the code needed to initialize and + destroy the global aggregates. We do the destruction + first, since that way we only need to reverse the decls once. */ + +void +finish_file () +{ + extern int lineno; + int start_time, this_time; + + tree fnname; + tree vars = static_aggregates; + int needs_cleaning = 0, needs_messing_up = 0; + + if (flag_detailed_statistics) + dump_tree_statistics (); + + /* Bad parse errors. Just forget about it. */ + if (! global_bindings_p () || current_class_type) + return; + + start_time = get_run_time (); + + /* Push into C language context, because that's all + we'll need here. */ + push_lang_context (lang_name_c); + + /* Set up the name of the file-level functions we may need. */ + /* Use a global object (which is already required to be unique over + the program) rather than the file name (which imposes extra + constraints). -- Raeburn@MIT.EDU, 10 Jan 1990. */ + + /* See if we really need the hassle. */ + while (vars && needs_cleaning == 0) + { + tree decl = TREE_VALUE (vars); + tree type = TREE_TYPE (decl); + if (TYPE_NEEDS_DESTRUCTOR (type)) + { + needs_cleaning = 1; + needs_messing_up = 1; + break; + } + else + needs_messing_up |= TYPE_NEEDS_CONSTRUCTING (type); + vars = TREE_CHAIN (vars); + } + if (needs_cleaning == 0) + goto mess_up; + + /* Otherwise, GDB can get confused, because in only knows + about source for LINENO-1 lines. */ + lineno -= 1; + + fnname = get_file_function_name ('D'); + start_function (void_list_node, build_parse_node (CALL_EXPR, fnname, void_list_node, NULL_TREE), 0, 0); + fnname = DECL_ASSEMBLER_NAME (current_function_decl); + store_parm_decls (); + + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + + /* These must be done in backward order to destroy, + in which they happen to be! */ + while (vars) + { + tree decl = TREE_VALUE (vars); + tree type = TREE_TYPE (decl); + tree temp = TREE_PURPOSE (vars); + + if (TYPE_NEEDS_DESTRUCTOR (type)) + { + if (TREE_STATIC (vars)) + expand_start_cond (build_binary_op (NE_EXPR, temp, integer_zero_node, 1), 0); + if (TREE_CODE (type) == ARRAY_TYPE) + temp = decl; + else + { + mark_addressable (decl); + temp = build1 (ADDR_EXPR, TYPE_POINTER_TO (type), decl); + } + temp = build_delete (TREE_TYPE (temp), temp, + integer_two_node, LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); + expand_expr_stmt (temp); + + if (TREE_STATIC (vars)) + expand_end_cond (); + } + vars = TREE_CHAIN (vars); + } + + expand_end_bindings (getdecls(), 1, 0); + poplevel (1, 0, 0); + pop_momentary (); + + finish_function (lineno, 0); + + assemble_destructor (IDENTIFIER_POINTER (fnname)); + + /* if it needed cleaning, then it will need messing up: drop through */ + + mess_up: + /* Must do this while we think we are at the top level. */ + vars = nreverse (static_aggregates); + if (vars != NULL_TREE) + { + fnname = get_file_function_name ('I'); + start_function (void_list_node, build_parse_node (CALL_EXPR, fnname, void_list_node, NULL_TREE), 0, 0); + fnname = DECL_ASSEMBLER_NAME (current_function_decl); + store_parm_decls (); + + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + + while (vars) + { + tree decl = TREE_VALUE (vars); + tree init = TREE_PURPOSE (vars); + + /* If this was a static attribute within some function's scope, + then don't initialize it here. Also, don't bother + with initializers that contain errors. */ + if (TREE_STATIC (vars) + || (init && TREE_CODE (init) == TREE_LIST + && value_member (error_mark_node, init))) + { + vars = TREE_CHAIN (vars); + continue; + } + + if (TREE_CODE (decl) == VAR_DECL) + { + /* Set these global variables so that GDB at least puts + us near the declaration which required the initialization. */ + input_filename = DECL_SOURCE_FILE (decl); + lineno = DECL_SOURCE_LINE (decl); + emit_note (input_filename, lineno); + + if (init) + { + if (TREE_CODE (init) == VAR_DECL) + { + /* This behavior results when there are + multiple declarations of an aggregate, + the last of which defines it. */ + if (DECL_RTL (init) == DECL_RTL (decl)) + { + my_friendly_assert (DECL_INITIAL (decl) == error_mark_node + || (TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR + && CONSTRUCTOR_ELTS (DECL_INITIAL (decl)) == NULL_TREE), + 199); + init = DECL_INITIAL (init); + if (TREE_CODE (init) == CONSTRUCTOR + && CONSTRUCTOR_ELTS (init) == NULL_TREE) + init = NULL_TREE; + } +#if 0 + else if (TREE_TYPE (decl) == TREE_TYPE (init)) + { +#if 1 + my_friendly_abort (200); +#else + /* point to real decl's rtl anyway. */ + DECL_RTL (init) = DECL_RTL (decl); + my_friendly_assert (DECL_INITIAL (decl) == error_mark_node, + 201); + init = DECL_INITIAL (init); +#endif /* 1 */ + } +#endif /* 0 */ + } + } + if (IS_AGGR_TYPE (TREE_TYPE (decl)) + || init == 0 + || TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) + { +#if 0 + /* Set this up so is_friend() works properly on _GLOBAL_ + fns. */ + tree old_dcc = DECL_CLASS_CONTEXT (current_function_decl); + if (old_dcc == NULL_TREE && IS_AGGR_TYPE (TREE_TYPE (decl))) + DECL_CLASS_CONTEXT (current_function_decl) = TREE_TYPE (decl); + expand_aggr_init (decl, init, 0); + DECL_CLASS_CONTEXT (current_function_decl) = old_dcc; +#else + expand_aggr_init (decl, init, 0); +#endif + } + else if (TREE_CODE (init) == TREE_VEC) + { + expand_expr (expand_vec_init (decl, TREE_VEC_ELT (init, 0), + TREE_VEC_ELT (init, 1), + TREE_VEC_ELT (init, 2), 0), + const0_rtx, VOIDmode, 0); + free_temp_slots (); + } + else + expand_assignment (decl, init, 0, 0); + } + else if (TREE_CODE (decl) == SAVE_EXPR) + { + if (! PARM_DECL_EXPR (decl)) + { + /* a `new' expression at top level. */ + expand_expr (decl, const0_rtx, VOIDmode, 0); + free_temp_slots (); + expand_aggr_init (build_indirect_ref (decl, NULL_PTR), init, 0); + } + } + else if (decl == error_mark_node) + ; + else my_friendly_abort (22); + vars = TREE_CHAIN (vars); + } + + expand_end_bindings (getdecls(), 1, 0); + poplevel (1, 0, 0); + pop_momentary (); + + finish_function (lineno, 0); + assemble_constructor (IDENTIFIER_POINTER (fnname)); + } + + /* Done with C language context needs. */ + pop_lang_context (); + + /* Now write out any static class variables (which may have since + learned how to be initialized). */ + while (pending_statics) + { + tree decl = TREE_VALUE (pending_statics); + if (TREE_USED (decl) == 1 + || TREE_READONLY (decl) == 0 + || DECL_INITIAL (decl) == 0) + rest_of_decl_compilation (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), 1, 1); + pending_statics = TREE_CHAIN (pending_statics); + } + + this_time = get_run_time (); + parse_time -= this_time - start_time; + varconst_time += this_time - start_time; + + /* Now write out inline functions which had their addresses taken + and which were not declared virtual and which were not declared + `extern inline'. */ + while (pending_addressable_inlines) + { + tree decl = TREE_VALUE (pending_addressable_inlines); + if (! TREE_ASM_WRITTEN (decl) + && ! DECL_EXTERNAL (decl) + && DECL_SAVED_INSNS (decl)) + { + temporary_allocation (); + output_inline_function (decl); + permanent_allocation (); + } + pending_addressable_inlines = TREE_CHAIN (pending_addressable_inlines); + } + + start_time = get_run_time (); + + /* Now delete from the chain of variables all virtual function tables. + We output them all ourselves, because each will be treated specially. */ + +#if 1 + /* The reason for pushing garbage onto the global_binding_level is to + ensure that we can slice out _DECLs which pertain to virtual function + tables. If the last thing pushed onto the global_binding_level was a + virtual function table, then slicing it out would slice away all the + decls (i.e., we lose the head of the chain). + + There are several ways of getting the same effect, from changing the + way that iterators over the chain treat the elements that pertain to + virtual function tables, moving the implementation of this code to + cp-decl.c (where we can manipulate global_binding_level directly), + popping the garbage after pushing it and slicing away the vtable + stuff, or just leaving it alone. */ + + /* Make last thing in global scope not be a virtual function table. */ +#if 0 /* not yet, should get fixed properly later */ + vars = make_type_decl (get_identifier (" @%$#@!"), integer_type_node); +#else + vars = build_decl (TYPE_DECL, get_identifier (" @%$#@!"), integer_type_node); +#endif + DECL_IGNORED_P (vars) = 1; + DECL_SOURCE_LINE (vars) = 0; + pushdecl (vars); +#endif + + walk_vtables (finish_vtable_typedecl, finish_vtable_vardecl); + + if (write_virtuals == 2) + { + /* Now complain about an virtual function tables promised + but not delivered. */ + while (pending_vtables) + { + if (TREE_PURPOSE (pending_vtables) == NULL_TREE) + error ("virtual function table for `%s' not defined", + IDENTIFIER_POINTER (TREE_VALUE (pending_vtables))); + pending_vtables = TREE_CHAIN (pending_vtables); + } + } + + permanent_allocation (); + this_time = get_run_time (); + parse_time -= this_time - start_time; + varconst_time += this_time - start_time; + + if (flag_detailed_statistics) + dump_time_statistics (); +} diff --git a/gcc/cp/errfn.c b/gcc/cp/errfn.c new file mode 100644 index 0000000..21feb77 --- /dev/null +++ b/gcc/cp/errfn.c @@ -0,0 +1,217 @@ +/* Provide a call-back mechanism for handling error output. + Copyright (C) 1993 Free Software Foundation, Inc. + Contributed by Jason Merrill (jason@cygnus.com) + + This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "config.h" +#include "tree.h" +#include <ctype.h> + +/* cp_printer is the type of a function which converts an argument into + a string for digestion by printf. The cp_printer function should deal + with all memory management; the functions in this file will not free + the char*s returned. See cp-error.c for an example use of this code. */ + +typedef char* cp_printer PROTO((HOST_WIDE_INT, int)); +extern cp_printer * cp_printers[256]; + +typedef void errorfn (); /* deliberately vague */ + +extern char* cp_file_of PROTO((tree)); +extern int cp_line_of PROTO((tree)); + +#define STRDUP(f) (ap = (char *) alloca (strlen (f) +1), strcpy (ap, (f)), ap) + +#define NARGS 3 +#define arglist a1, a2, a3 +#define arglist_dcl HOST_WIDE_INT a1, a2, a3; +#define ARGSINIT args[0] = a1; args[1] = a2; args[2] = a3; +#define ARGSLIST args[0], args[1], args[2] + +static void +cp_thing (errfn, atarg1, format, arglist) + errorfn *errfn; + int atarg1; + char *format; + arglist_dcl +{ + char *fmt; + char *f; + char *ap; + int arg; + HOST_WIDE_INT atarg = atarg1 ? a1 : 0; + HOST_WIDE_INT args[NARGS]; + ARGSINIT + + fmt = STRDUP(format); + + for (f = fmt, arg = 0; *f; ++f) + { + cp_printer * function; + int alternate; + int maybe_here; + + /* ignore text */ + if (*f != '%') continue; + + ++f; + + alternate = 0; + maybe_here = 0; + + /* ignore most flags */ + while (*f == ' ' || *f == '-' || *f == '+' || *f == '#') + { + if (*f == '+') + maybe_here = 1; + else if (*f == '#') + alternate = 1; + ++f; + } + + /* ignore field width */ + if (*f == '*') + { + ++f; + ++arg; + } + else + while (isdigit (*f)) + ++f; + + /* ignore precision */ + if (*f == '.') + { + ++f; + if (*f == '*') + { + ++f; + ++arg; + } + else + while (isdigit (*f)) + ++f; + } + + /* ignore "long" */ + if (*f == 'l') + ++f; + + function = cp_printers[*f]; + + if (function) + { + char *p; + + if (arg >= NARGS) abort (); + + if (maybe_here && atarg) + atarg = args[arg]; + + /* Must use a temporary to avoid calling *function twice */ + p = (*function) (args[arg], alternate); + args[arg] = (HOST_WIDE_INT) STRDUP(p); + *f = 's'; + } + + ++arg; /* Assume valid format string */ + + } + + if (atarg) + { + char *file = cp_file_of ((tree) atarg); + int line = cp_line_of ((tree) atarg); + (*errfn) (file, line, fmt, ARGSLIST); + } + else + (*errfn) (fmt, ARGSLIST); + +} + +void +cp_error (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn error; + cp_thing (error, 0, format, arglist); +} + +void +cp_warning (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn warning; + cp_thing (warning, 0, format, arglist); +} + +void +cp_pedwarn (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn pedwarn; + cp_thing (pedwarn, 0, format, arglist); +} + +void +cp_compiler_error (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn compiler_error; + cp_thing (compiler_error, 0, format, arglist); +} + +void +cp_sprintf (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn sprintf; + cp_thing (sprintf, 0, format, arglist); +} + +void +cp_error_at (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn error_with_file_and_line; + cp_thing (error_with_file_and_line, 1, format, arglist); +} + +void +cp_warning_at (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn warning_with_file_and_line; + cp_thing (warning_with_file_and_line, 1, format, arglist); +} + +void +cp_pedwarn_at (format, arglist) + char *format; + arglist_dcl +{ + extern errorfn pedwarn_with_file_and_line; + cp_thing (pedwarn_with_file_and_line, 1, format, arglist); +} diff --git a/gcc/cp/error.c b/gcc/cp/error.c new file mode 100644 index 0000000..75167fcd --- /dev/null +++ b/gcc/cp/error.c @@ -0,0 +1,1339 @@ +/* Call-backs for C++ error reporting. + This code is non-reentrant. + Copyright (C) 1993 Free Software Foundation, Inc. + + This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "config.h" +#include "tree.h" +#include "cp-tree.h" +#include "obstack.h" +#include <ctype.h> + +typedef char* cp_printer (); + +#define A args_as_string +#define C code_as_string +#define D decl_as_string +#define E expr_as_string +#define L language_as_string +#define O op_as_string +#define P parm_as_string +#define T type_as_string + +#define _ (cp_printer *) 0 +cp_printer * cp_printers[256] = +{ +/*0 1 2 3 4 5 6 7 8 9 A B C D E F */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x00 */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x10 */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x20 */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x30 */ + _, A, _, C, D, E, _, _, _, _, _, _, L, _, _, O, /* 0x40 */ + P, _, _, _, T, _, _, _, _, _, _, _, _, _, _, _, /* 0x50 */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x60 */ + _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0x70 */ +}; +#undef C +#undef D +#undef E +#undef L +#undef O +#undef P +#undef T +#undef _ + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +/* Obstack where we build text strings for overloading, etc. */ +static struct obstack scratch_obstack; +static char *scratch_firstobj; + +# define OB_INIT() (scratch_firstobj ? (obstack_free (&scratch_obstack, scratch_firstobj), 0) : 0) +# define OB_PUTC(C) (obstack_1grow (&scratch_obstack, (C))) +# define OB_PUTC2(C1,C2) \ + (obstack_1grow (&scratch_obstack, (C1)), obstack_1grow (&scratch_obstack, (C2))) +# define OB_PUTS(S) (obstack_grow (&scratch_obstack, (S), sizeof (S) - 1)) +# define OB_PUTID(ID) \ + (obstack_grow (&scratch_obstack, IDENTIFIER_POINTER (ID), \ + IDENTIFIER_LENGTH (ID))) +# define OB_PUTCP(S) (obstack_grow (&scratch_obstack, (S), strlen (S))) +# define OB_FINISH() (obstack_1grow (&scratch_obstack, '\0')) +# define OB_PUTI(CST) do { sprintf (digit_buffer, "%d", (CST)); \ + OB_PUTCP (digit_buffer); } while (0) + +# define NEXT_CODE(t) (TREE_CODE (TREE_TYPE (t))) + +static void dump_type (), dump_decl (), dump_function_decl (); +static void dump_expr (), dump_unary_op (), dump_binary_op (); +static void dump_aggr_type (), dump_type_prefix (), dump_type_suffix (); +static void dump_function_name (); + +void +init_error () +{ + gcc_obstack_init (&scratch_obstack); + scratch_firstobj = (char *)obstack_alloc (&scratch_obstack, 0); +} + +/* Counter to help build parameter names in case they were omitted. */ +static int dummy_name; + +enum pad { none, before, after }; + +static void +dump_readonly_or_volatile (t, p) + tree t; + enum pad p; +{ + if (TYPE_READONLY (t) || TYPE_VOLATILE (t)) + { + if (p == before) OB_PUTC (' '); + if (TYPE_READONLY (t)) + OB_PUTS ("const"); + if (TYPE_VOLATILE (t)) + OB_PUTS ("volatile"); + if (p == after) OB_PUTC (' '); + } +} + +/* This must be large enough to hold any printed integer or floating-point + value. */ +static char digit_buffer[128]; + +/* Dump into the obstack a human-readable equivalent of TYPE. */ +static void +dump_type (t, v) + tree t; + int v; /* verbose? */ +{ + if (t == NULL_TREE) + return; + + if (TYPE_PTRMEMFUNC_P (t)) + goto offset_type; + + switch (TREE_CODE (t)) + { + case ERROR_MARK: + OB_PUTS ("<error>"); + break; + + case UNKNOWN_TYPE: + OB_PUTS ("<unknown type>"); + break; + + case TREE_LIST: + /* i.e. function taking no arguments */ + if (t != void_list_node) + { + dump_type (TREE_VALUE (t), v); + /* Can this happen other than for default arguments? */ + if (TREE_PURPOSE (t) && v) + { + OB_PUTS (" = "); + dump_expr (TREE_PURPOSE (t)); + } + if (TREE_CHAIN (t)) + { + if (TREE_CHAIN (t) != void_list_node) + { + OB_PUTC2 (',', ' '); + dump_type (TREE_CHAIN (t), v); + } + } + else OB_PUTS (" ..."); + } + break; + + case IDENTIFIER_NODE: + OB_PUTID (t); + break; + + case TREE_VEC: + dump_type (BINFO_TYPE (t), v); + break; + + case RECORD_TYPE: + case UNION_TYPE: + case ENUMERAL_TYPE: + if (TYPE_LANG_SPECIFIC (t) + && (IS_SIGNATURE_POINTER (t) || IS_SIGNATURE_REFERENCE (t))) + { + if (TYPE_READONLY (t) | TYPE_VOLATILE (t)) + dump_readonly_or_volatile (t); + dump_type (SIGNATURE_TYPE (t), v); + if (IS_SIGNATURE_POINTER (t)) + OB_PUTC ('*'); + else + OB_PUTC ('&'); + } + else + dump_aggr_type (t, v); + break; + + case TYPE_DECL: + dump_readonly_or_volatile (t, after); + OB_PUTID (DECL_NAME (t)); + break; + + case INTEGER_TYPE: + if (!TREE_UNSIGNED (TYPE_MAIN_VARIANT (t)) && TREE_UNSIGNED (t)) + OB_PUTS ("unsigned "); + else if (TREE_UNSIGNED (TYPE_MAIN_VARIANT (t)) && !TREE_UNSIGNED (t)) + OB_PUTS ("signed "); + + /* fall through. */ + case REAL_TYPE: + case VOID_TYPE: + dump_readonly_or_volatile (t, after); + OB_PUTID (TYPE_IDENTIFIER (t)); + break; + + case TEMPLATE_TYPE_PARM: + OB_PUTS ("<template type parm "); + OB_PUTID (TYPE_IDENTIFIER (t)); + OB_PUTC ('>'); + break; + + case UNINSTANTIATED_P_TYPE: + OB_PUTID (DECL_NAME (UPT_TEMPLATE (t))); + OB_PUTS ("<...>"); + break; + + /* This is not always necessary for pointers and such, but doing this + reduces code size. */ + case ARRAY_TYPE: + case POINTER_TYPE: + case REFERENCE_TYPE: + case OFFSET_TYPE: + offset_type: + case FUNCTION_TYPE: + case METHOD_TYPE: + dump_type_prefix (t, v); + dump_type_suffix (t, v); + break; + + default: + my_friendly_abort (68); + + } +} + +/* Print out a class declaration, in the form `class foo'. */ +static void +dump_aggr_type (t, v) + tree t; + int v; /* verbose? */ +{ + tree name; + char *variety; + + if (TREE_CODE (t) == ENUMERAL_TYPE) + variety = "enum"; + else if (TREE_CODE (t) == UNION_TYPE) + variety = "union"; + else if (TYPE_LANG_SPECIFIC (t) && CLASSTYPE_DECLARED_CLASS (t)) + variety = "class"; + else if (TYPE_LANG_SPECIFIC (t) && IS_SIGNATURE (t)) + variety = "signature"; + else + variety = "struct"; + + dump_readonly_or_volatile (t, after); + + if (v > 0) + { + OB_PUTCP (variety); + OB_PUTC (' '); + } + + name = TYPE_NAME (t); + + if (DECL_CONTEXT (name)) + { + /* FUNCTION_DECL or RECORD_TYPE */ + dump_decl (DECL_CONTEXT (name), 0); + OB_PUTC2 (':', ':'); + } + + /* kludge around wierd behavior on g++.brendan/line1.C */ + if (TREE_CODE (name) != IDENTIFIER_NODE) + name = DECL_NAME (name); + + if (ANON_AGGRNAME_P (name)) + { + OB_PUTS ("<anonymous"); + if (!v) + { + OB_PUTC (' '); + OB_PUTCP (variety); + } + OB_PUTC ('>'); + } + else + OB_PUTID (name); +} + +/* Dump into the obstack the initial part of the output for a given type. + This is necessary when dealing with things like functions returning + functions. Examples: + + return type of `int (* fee ())()': pointer -> function -> int. Both + pointer (and reference and offset) and function (and member) types must + deal with prefix and suffix. + + Arrays must also do this for DECL nodes, like int a[], and for things like + int *[]&. */ + +static void +dump_type_prefix (t, v) + tree t; + int v; /* verbosity */ +{ + if (TYPE_PTRMEMFUNC_P (t)) + { + t = TYPE_PTRMEMFUNC_FN_TYPE (t); + goto offset_type; + } + + switch (TREE_CODE (t)) + { + case POINTER_TYPE: + { + tree sub = TREE_TYPE (t); + + dump_type_prefix (sub, v); + /* A tree for a member pointer looks like pointer to offset, + so let the OFFSET_TYPE case handle it. */ + if (TREE_CODE (sub) != OFFSET_TYPE) + { + switch (TREE_CODE (sub)) + { + /* We don't want int ( *)() */ + case FUNCTION_TYPE: + case METHOD_TYPE: + break; + + case POINTER_TYPE: + /* We don't want "char * *" */ + if (! (TYPE_READONLY (sub) || TYPE_VOLATILE (sub))) + break; + /* But we do want "char *const *" */ + + default: + OB_PUTC (' '); + } + OB_PUTC ('*'); + dump_readonly_or_volatile (t, none); + } + } + break; + + case REFERENCE_TYPE: + { + tree sub = TREE_TYPE (t); + dump_type_prefix (sub, v); + + switch (TREE_CODE (sub)) + { + case POINTER_TYPE: + /* We don't want "char * &" */ + if (! (TYPE_READONLY (sub) || TYPE_VOLATILE (sub))) + break; + /* But we do want "char *const &" */ + + default: + OB_PUTC (' '); + } + } + OB_PUTC ('&'); + dump_readonly_or_volatile (t, none); + break; + + case OFFSET_TYPE: + offset_type: + dump_type_prefix (TREE_TYPE (t), v); + if (NEXT_CODE (t) != FUNCTION_TYPE && NEXT_CODE (t) != METHOD_TYPE) + OB_PUTC (' '); + if (TREE_CODE (t) == OFFSET_TYPE) + dump_type (TYPE_OFFSET_BASETYPE (t), 0); + else /* pointer to member function */ + dump_type (TYPE_METHOD_BASETYPE (TREE_TYPE (t)), 0); + OB_PUTC2 (':', ':'); + OB_PUTC ('*'); + dump_readonly_or_volatile (t, none); + break; + + /* Can only be reached through function pointer -- this would not be + correct if FUNCTION_DECLs used it. */ + case FUNCTION_TYPE: + dump_type_prefix (TREE_TYPE (t), v); + OB_PUTC2 (' ', '('); + break; + + case METHOD_TYPE: + dump_type_prefix (TREE_TYPE (t), v); + OB_PUTC2 (' ', '('); + dump_aggr_type (TYPE_METHOD_BASETYPE (t), 0); + OB_PUTC2 (':', ':'); + break; + + case ARRAY_TYPE: + dump_type_prefix (TREE_TYPE (t), v); + break; + + case ENUMERAL_TYPE: + case ERROR_MARK: + case IDENTIFIER_NODE: + case INTEGER_TYPE: + case REAL_TYPE: + case RECORD_TYPE: + case TEMPLATE_TYPE_PARM: + case TREE_LIST: + case TYPE_DECL: + case TREE_VEC: + case UNINSTANTIATED_P_TYPE: + case UNION_TYPE: + case UNKNOWN_TYPE: + case VOID_TYPE: + dump_type (t, v); + break; + + default: + my_friendly_abort (65); + } +} + +static void +dump_type_suffix (t, v) + tree t; + int v; /* verbose? */ +{ + if (TYPE_PTRMEMFUNC_P (t)) + t = TYPE_PTRMEMFUNC_FN_TYPE (t); + + switch (TREE_CODE (t)) + { + case POINTER_TYPE: + case REFERENCE_TYPE: + case OFFSET_TYPE: + dump_type_suffix (TREE_TYPE (t), v); + break; + + /* Can only be reached through function pointer */ + case FUNCTION_TYPE: + case METHOD_TYPE: + { + tree arg; + OB_PUTC2 (')', '('); + arg = TYPE_ARG_TYPES (t); + if (TREE_CODE (t) == METHOD_TYPE) + arg = TREE_CHAIN (arg); + + if (arg) + dump_type (arg, v); + else + OB_PUTS ("..."); + OB_PUTC (')'); + if (TREE_CODE (t) == METHOD_TYPE) + dump_readonly_or_volatile + (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))), before); + dump_type_suffix (TREE_TYPE (t), v); + break; + } + + case ARRAY_TYPE: + OB_PUTC ('['); + if (TYPE_DOMAIN (t)) + OB_PUTI (TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (t))) + 1); + OB_PUTC (']'); + dump_type_suffix (TREE_TYPE (t), v); + break; + + case ENUMERAL_TYPE: + case ERROR_MARK: + case IDENTIFIER_NODE: + case INTEGER_TYPE: + case REAL_TYPE: + case RECORD_TYPE: + case TEMPLATE_TYPE_PARM: + case TREE_LIST: + case TYPE_DECL: + case TREE_VEC: + case UNINSTANTIATED_P_TYPE: + case UNION_TYPE: + case UNKNOWN_TYPE: + case VOID_TYPE: + break; + + default: + my_friendly_abort (67); + } +} + +/* Return a function declaration which corresponds to the IDENTIFIER_NODE + argument. */ +tree +ident_fndecl (t) + tree t; +{ + tree n = IDENTIFIER_GLOBAL_VALUE (t); + + if (TREE_CODE (n) == FUNCTION_DECL) + return n; + else if (TREE_CODE (n) == TREE_LIST + && TREE_CODE (TREE_VALUE (n)) == FUNCTION_DECL) + return TREE_VALUE (n); + else + my_friendly_abort (66); +} + +#ifndef NO_DOLLAR_IN_LABEL +# define GLOBAL_THING "_GLOBAL_$" +#else +# ifndef NO_DOT_IN_LABEL +# define GLOBAL_THING "_GLOBAL_." +# else +# define GLOBAL_THING "_GLOBAL__" +# endif +#endif + +#define GLOBAL_IORD_P(NODE) \ + !strncmp(IDENTIFIER_POINTER(NODE),GLOBAL_THING,sizeof(GLOBAL_THING)-1) + +void +dump_global_iord (t) + tree t; +{ + char *name = IDENTIFIER_POINTER (t); + + OB_PUTS ("(static "); + if (name [sizeof (GLOBAL_THING) - 1] == 'I') + OB_PUTS ("initializers"); + else if (name [sizeof (GLOBAL_THING) - 1] == 'D') + OB_PUTS ("destructors"); + else + my_friendly_abort (352); + + OB_PUTS (" for "); + OB_PUTCP (input_filename); + OB_PUTC (')'); +} + +static void +dump_decl (t, v) + tree t; + int v; /* verbosity */ +{ + if (t == NULL_TREE) + return; + + switch (TREE_CODE (t)) + { + case ERROR_MARK: + OB_PUTS (" /* decl error */ "); + break; + + case VAR_DECL: + if (VTABLE_NAME_P (DECL_NAME (t))) + { + OB_PUTS ("vtable for "); + dump_type (DECL_CONTEXT (t), v); + break; + } + /* else fall through */ + case FIELD_DECL: + case PARM_DECL: + if (v > 0) + { + dump_type_prefix (TREE_TYPE (t), v); + OB_PUTC(' '); + } + /* DECL_CLASS_CONTEXT isn't being set in some cases. Hmm... */ + if (TREE_CODE (t) == FIELD_DECL + || (TREE_CODE (t) == VAR_DECL && DECL_CONTEXT (t) + && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (t))) == 't')) + { + dump_type (DECL_CONTEXT (t), 0); + OB_PUTC2(':', ':'); + } + if (DECL_NAME (t)) + dump_decl (DECL_NAME (t), v); + else + OB_PUTS ("<anon>"); + if (v > 0) dump_type_suffix (TREE_TYPE (t), v); + break; + + case ARRAY_REF: + dump_decl (TREE_OPERAND (t, 0), v); + OB_PUTC ('['); + dump_decl (TREE_OPERAND (t, 1), v); + OB_PUTC (']'); + break; + + /* So that we can do dump_decl in dump_aggr_type and have it work for + both class and function scope. */ + case RECORD_TYPE: + case UNION_TYPE: + case ENUMERAL_TYPE: + dump_type (t, v); + break; + + case TYPE_DECL: + dump_type (TREE_TYPE (t), v); + break; + + case TYPE_EXPR: + my_friendly_abort (69); + break; + + /* These special cases are duplicated here so that other functions + can feed identifiers to cp_error and get them demangled properly. */ + case IDENTIFIER_NODE: + if (DESTRUCTOR_NAME_P (t)) + { + OB_PUTC ('~'); + dump_decl (DECL_NAME (ident_fndecl (t)), 0); + } + else if (IDENTIFIER_TYPENAME_P (t)) + { + OB_PUTS ("operator "); + /* Not exactly IDENTIFIER_TYPE_VALUE. */ + dump_type (TREE_TYPE (t), 0); + break; + } + else if (IDENTIFIER_OPNAME_P (t)) + { + char *name_string = operator_name_string (t); + OB_PUTS ("operator "); + OB_PUTCP (name_string); + } + else + OB_PUTID (t); + break; + + case FUNCTION_DECL: + if (GLOBAL_IORD_P (DECL_ASSEMBLER_NAME (t))) + dump_global_iord (DECL_ASSEMBLER_NAME (t)); + else + dump_function_decl (t, v); + break; + + case TEMPLATE_DECL: + switch (NEXT_CODE (t)) + { + case METHOD_TYPE: + case FUNCTION_TYPE: + dump_function_decl (t, v); + break; + + default: + my_friendly_abort (353); + } + break; + + case LABEL_DECL: + OB_PUTID (DECL_NAME (t)); + break; + + case CONST_DECL: + if (NEXT_CODE (t) == ENUMERAL_TYPE) + { + if (DECL_CONTEXT (t)) + { + dump_decl (DECL_CONTEXT (t), 0); + OB_PUTC2 (':', ':'); + } + OB_PUTID (DECL_NAME (t)); + } + else + dump_expr (DECL_INITIAL (t), 0); + break; + + default: + my_friendly_abort (70); + } +} + +/* Pretty printing for announce_function. T is the declaration of the + function we are interested in seeing. V is non-zero if we should print + the type that this function returns. */ + +static void +dump_function_decl (t, v) + tree t; + int v; +{ + tree name = DECL_ASSEMBLER_NAME (t); + tree fntype = TREE_TYPE (t); + tree parmtypes = TYPE_ARG_TYPES (fntype); + tree cname = NULL_TREE; + int spaces = 0; + + /* Friends have DECL_CLASS_CONTEXT set, but not DECL_CONTEXT. */ + if (DECL_CONTEXT (t)) + cname = DECL_CLASS_CONTEXT (t); + /* this is for partially instantiated template methods */ + else if (TREE_CODE (fntype) == METHOD_TYPE) + cname = TREE_TYPE (TREE_VALUE (parmtypes)); + + v = (v > 0); + + if (v) + { + if (DECL_STATIC_FUNCTION_P (t)) + OB_PUTS ("static "); + + if (! IDENTIFIER_TYPENAME_P (name) + && ! DECL_CONSTRUCTOR_P (t) + && ! DESTRUCTOR_NAME_P (name)) + { + dump_type_prefix (TREE_TYPE (fntype), 1); + OB_PUTC (' '); + } + } + + if (cname) + { + dump_type (cname, 0); + OB_PUTC2 (':', ':'); + if (TREE_CODE (fntype) == METHOD_TYPE && parmtypes) + parmtypes = TREE_CHAIN (parmtypes); + if (DECL_CONSTRUCTOR_FOR_VBASE_P (t)) + /* Skip past "in_charge" identifier. */ + parmtypes = TREE_CHAIN (parmtypes); + } + + if (DESTRUCTOR_NAME_P (name)) + parmtypes = TREE_CHAIN (parmtypes); + + dump_function_name (t); + + OB_PUTC ('('); + + if (parmtypes) + dump_type (parmtypes, v); + else + OB_PUTS ("..."); + + OB_PUTC (')'); + + if (v && ! IDENTIFIER_TYPENAME_P (name)) + dump_type_suffix (TREE_TYPE (fntype), 1); + + if (TREE_CODE (fntype) == METHOD_TYPE) + { + if (IS_SIGNATURE (cname)) + /* We look at the type pointed to by the `optr' field of `this.' */ + dump_readonly_or_volatile + (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_VALUE (TYPE_ARG_TYPES (fntype))))), before); + else + dump_readonly_or_volatile + (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype))), before); + } +} + +/* Handle the function name for a FUNCTION_DECL node, grokking operators + and destructors properly. */ +static void +dump_function_name (t) + tree t; +{ + tree name = DECL_NAME (t); + + /* There ought to be a better way to find out whether or not something is + a destructor. */ + if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (t))) + { + OB_PUTC ('~'); + dump_decl (name, 0); + } + else if (IDENTIFIER_TYPENAME_P (name)) + { + /* This cannot use the hack that the operator's return + type is stashed off of its name because it may be + used for error reporting. In the case of conflicting + declarations, both will have the same name, yet + the types will be different, hence the TREE_TYPE field + of the first name will be clobbered by the second. */ + OB_PUTS ("operator "); + dump_type (TREE_TYPE (TREE_TYPE (t)), 0); + } + else if (IDENTIFIER_OPNAME_P (name)) + { + char *name_string = operator_name_string (name); + OB_PUTS ("operator "); + OB_PUTCP (name_string); + } + else + dump_decl (name, 0); +} + +static void +dump_char (c) + char c; +{ + switch (c) + { + case '\n': + OB_PUTS ("\\n"); + break; + case '\t': + OB_PUTS ("\\t"); + break; + case '\v': + OB_PUTS ("\\v"); + break; + case '\b': + OB_PUTS ("\\b"); + break; + case '\r': + OB_PUTS ("\\r"); + break; + case '\f': + OB_PUTS ("\\f"); + break; + case '\a': + OB_PUTS ("\\a"); + break; + case '\\': + OB_PUTS ("\\\\"); + break; + case '\'': + OB_PUTS ("\\'"); + break; + case '\"': + OB_PUTS ("\\\""); + break; + default: + if (isprint (c)) + OB_PUTC (c); + else + { + sprintf (digit_buffer, "\\%03o", (int) c); + OB_PUTCP (digit_buffer); + } + } +} + +/* Print out a list of initializers (subr of dump_expr) */ +static void +dump_expr_list (l) + tree l; +{ + while (l) + { + dump_expr (TREE_VALUE (l), 0); + if (TREE_CHAIN (l)) + OB_PUTC2 (',', ' '); + l = TREE_CHAIN (l); + } +} + +/* Print out an expression */ +static void +dump_expr (t, nop) + tree t; + int nop; /* suppress parens */ +{ + switch (TREE_CODE (t)) + { + case VAR_DECL: + case PARM_DECL: + case FIELD_DECL: + case CONST_DECL: + case FUNCTION_DECL: + dump_decl (t, -1); + break; + + case INTEGER_CST: + { + tree type = TREE_TYPE (t); + my_friendly_assert (type != 0, 81); + + /* If it's an enum, output its tag, rather than its value. */ + if (TREE_CODE (type) == ENUMERAL_TYPE) + { + char *p = enum_name_string (t, type); + OB_PUTCP (p); + } + else if (type == char_type_node + || type == signed_char_type_node + || type == unsigned_char_type_node) + { + OB_PUTC ('\''); + dump_char (TREE_INT_CST_LOW (t)); + OB_PUTC ('\''); + } + else if (TREE_INT_CST_HIGH (t) + != (TREE_INT_CST_LOW (t) >> (HOST_BITS_PER_WIDE_INT - 1))) + { + tree val = t; + if (TREE_INT_CST_HIGH (val) < 0) + { + OB_PUTC ('-'); + val = build_int_2 (~TREE_INT_CST_LOW (val), + -TREE_INT_CST_HIGH (val)); + } + /* Would "%x%0*x" or "%x%*0x" get zero-padding on all + systems? */ + { + static char format[10]; /* "%x%09999x\0" */ + if (!format[0]) + sprintf (format, "%%x%%0%dx", HOST_BITS_PER_INT / 4); + sprintf (digit_buffer, format, TREE_INT_CST_HIGH (val), + TREE_INT_CST_LOW (val)); + OB_PUTCP (digit_buffer); + } + } + else + OB_PUTI (TREE_INT_CST_LOW (t)); + } + break; + + case REAL_CST: +#ifndef REAL_IS_NOT_DOUBLE + sprintf (digit_buffer, "%g", TREE_REAL_CST (t)); +#else + { + unsigned char *p = (unsigned char *) &TREE_REAL_CST (t); + int i; + strcpy (digit_buffer, "0x"); + for (i = 0; i < sizeof TREE_REAL_CST (t); i++) + sprintf (digit_buffer + 2 + 2*i, "%02x", *p++); + } +#endif + OB_PUTCP (digit_buffer); + break; + + case STRING_CST: + { + char *p = TREE_STRING_POINTER (t); + int len = TREE_STRING_LENGTH (t) - 1; + int i; + + OB_PUTC ('\"'); + for (i = 0; i < len; i++) + dump_char (p[i]); + OB_PUTC ('\"'); + } + break; + + case COMPOUND_EXPR: + dump_binary_op (",", t); + break; + + case COND_EXPR: + OB_PUTC ('('); + dump_expr (TREE_OPERAND (t, 0), 0); + OB_PUTS (" ? "); + dump_expr (TREE_OPERAND (t, 1), 0); + OB_PUTS (" : "); + dump_expr (TREE_OPERAND (t, 2), 0); + OB_PUTC (')'); + break; + + case SAVE_EXPR: + if (TREE_HAS_CONSTRUCTOR (t)) + { + OB_PUTS ("new "); + dump_type (TREE_TYPE (TREE_TYPE (t)), 0); + PARM_DECL_EXPR (t) = 1; + } + else + { + sorry ("operand of SAVE_EXPR not understood"); + goto error; + } + break; + + case NEW_EXPR: + OB_PUTID (TYPE_IDENTIFIER (TREE_TYPE (t))); + OB_PUTC ('('); + dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1))); + OB_PUTC (')'); + break; + + case CALL_EXPR: + { + tree fn = TREE_OPERAND (t, 0); + tree args = TREE_OPERAND (t, 1); + + if (TREE_CODE (fn) == ADDR_EXPR) + fn = TREE_OPERAND (fn, 0); + + if (NEXT_CODE (fn) == METHOD_TYPE) + { + tree ob = TREE_VALUE (args); + if (TREE_CODE (ob) == ADDR_EXPR) + { + dump_expr (TREE_OPERAND (ob, 0), 0); + OB_PUTC ('.'); + } + else if (TREE_CODE (ob) != PARM_DECL + || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this")) + { + dump_expr (ob, 0); + OB_PUTC2 ('-', '>'); + } + args = TREE_CHAIN (args); + } + dump_expr (fn, 0); + OB_PUTC('('); + dump_expr_list (args); + OB_PUTC (')'); + } + break; + + case WITH_CLEANUP_EXPR: + /* Note that this only works for G++ cleanups. If somebody + builds a general cleanup, there's no way to represent it. */ + dump_expr (TREE_OPERAND (t, 0), 0); + break; + + case TARGET_EXPR: + /* Note that this only works for G++ target exprs. If somebody + builds a general TARGET_EXPR, there's no way to represent that + it initializes anything other that the parameter slot for the + default argument. Note we may have cleared out the first + operand in expand_expr, so don't go killing ourselves. */ + if (TREE_OPERAND (t, 1)) + dump_expr (TREE_OPERAND (t, 1), 0); + break; + + case MODIFY_EXPR: + case PLUS_EXPR: + case MINUS_EXPR: + case MULT_EXPR: + case TRUNC_DIV_EXPR: + case TRUNC_MOD_EXPR: + case MIN_EXPR: + case MAX_EXPR: + case LSHIFT_EXPR: + case RSHIFT_EXPR: + case BIT_IOR_EXPR: + case BIT_XOR_EXPR: + case BIT_AND_EXPR: + case BIT_ANDTC_EXPR: + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: + case LT_EXPR: + case LE_EXPR: + case GT_EXPR: + case GE_EXPR: + case EQ_EXPR: + case NE_EXPR: + dump_binary_op (opname_tab[(int) TREE_CODE (t)], t); + break; + + case CEIL_DIV_EXPR: + case FLOOR_DIV_EXPR: + case ROUND_DIV_EXPR: + dump_binary_op ("/", t); + break; + + case CEIL_MOD_EXPR: + case FLOOR_MOD_EXPR: + case ROUND_MOD_EXPR: + dump_binary_op ("%", t); + break; + + case COMPONENT_REF: + { + tree ob = TREE_OPERAND (t, 0); + if (TREE_CODE (ob) == INDIRECT_REF) + { + ob = TREE_OPERAND (ob, 0); + if (TREE_CODE (ob) != PARM_DECL + || strcmp (IDENTIFIER_POINTER (DECL_NAME (ob)), "this")) + { + dump_expr (ob, 0); + OB_PUTC2 ('-', '>'); + } + } + else + { + dump_expr (ob, 0); + OB_PUTC ('.'); + } + dump_expr (TREE_OPERAND (t, 1), 1); + } + break; + + case CONVERT_EXPR: + dump_unary_op ("+", t, nop); + break; + + case ADDR_EXPR: + if (TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL + || TREE_CODE (TREE_OPERAND (t, 0)) == STRING_CST) + dump_expr (TREE_OPERAND (t, 0), 0); + else + dump_unary_op ("&", t, nop); + break; + + case INDIRECT_REF: + if (TREE_HAS_CONSTRUCTOR (t)) + { + t = TREE_OPERAND (t, 0); + my_friendly_assert (TREE_CODE (t) == CALL_EXPR, 237); + dump_expr (TREE_OPERAND (t, 0), 0); + OB_PUTC ('('); + dump_expr_list (TREE_CHAIN (TREE_OPERAND (t, 1))); + OB_PUTC (')'); + } + else + { + if (NEXT_CODE (TREE_OPERAND (t, 0)) == REFERENCE_TYPE) + dump_expr (TREE_OPERAND (t, 0), nop); + else + dump_unary_op ("*", t, nop); + } + break; + + case NEGATE_EXPR: + case BIT_NOT_EXPR: + case TRUTH_NOT_EXPR: + case PREDECREMENT_EXPR: + case PREINCREMENT_EXPR: + dump_unary_op (opname_tab [(int)TREE_CODE (t)], t, nop); + break; + + case POSTDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + OB_PUTC ('('); + dump_expr (TREE_OPERAND (t, 0), 0); + OB_PUTCP (opname_tab[(int)TREE_CODE (t)]); + OB_PUTC (')'); + break; + + case NON_LVALUE_EXPR: + /* FIXME: This is a KLUDGE workaround for a parsing problem. There + should be another level of INDIRECT_REF so that I don't have to do + this. */ + if (NEXT_CODE (t) == POINTER_TYPE) + { + tree next = TREE_TYPE (TREE_TYPE (t)); + + while (TREE_CODE (next) == POINTER_TYPE) + next = TREE_TYPE (next); + + if (TREE_CODE (next) == FUNCTION_TYPE) + { + if (!nop) OB_PUTC ('('); + OB_PUTC ('*'); + dump_expr (TREE_OPERAND (t, 0), 1); + if (!nop) OB_PUTC (')'); + break; + } + /* else FALLTHRU */ + } + dump_expr (TREE_OPERAND (t, 0), 0); + break; + + case NOP_EXPR: + dump_expr (TREE_OPERAND (t, 0), nop); + break; + + case CONSTRUCTOR: + OB_PUTC ('{'); + dump_expr_list (CONSTRUCTOR_ELTS (t), 0); + OB_PUTC ('}'); + break; + + /* This list is incomplete, but should suffice for now. + It is very important that `sorry' does not call + `report_error_function'. That could cause an infinite loop. */ + default: + sorry ("`%s' not supported by dump_expr", + tree_code_name[(int) TREE_CODE (t)]); + + /* fall through to ERROR_MARK... */ + case ERROR_MARK: + error: + OB_PUTCP ("/* error */"); + break; + } +} + +static void +dump_binary_op (opstring, t) + char *opstring; + tree t; +{ + OB_PUTC ('('); + dump_expr (TREE_OPERAND (t, 0), 1); + OB_PUTC (' '); + OB_PUTCP (opstring); + OB_PUTC (' '); + dump_expr (TREE_OPERAND (t, 1), 1); + OB_PUTC (')'); +} + +static void +dump_unary_op (opstring, t, nop) + char *opstring; + tree t; + int nop; +{ + if (!nop) OB_PUTC ('('); + OB_PUTCP (opstring); + dump_expr (TREE_OPERAND (t, 0), 1); + if (!nop) OB_PUTC (')'); +} + +char * +fndecl_as_string (cname, fndecl, print_ret_type_p) + tree cname, fndecl; + int print_ret_type_p; +{ + return decl_as_string (fndecl, print_ret_type_p); +} + +/* Same, but handtype a _TYPE. + Called from convert_to_reference, mangle_class_name_for_template, + build_unary_op, and GNU_xref_decl. */ +char * +type_as_string (typ, v) + tree typ; + int v; +{ + OB_INIT (); + + dump_type (typ, v); + + OB_FINISH (); + + return (char *)obstack_base (&scratch_obstack); +} + +char * +expr_as_string (decl, v) + tree decl; + int v; +{ + OB_INIT (); + + dump_expr (decl, 1); + + OB_FINISH (); + + return (char *)obstack_base (&scratch_obstack); +} + +/* A cross between type_as_string and fndecl_as_string. + Only called from substitute_nice_name. */ +char * +decl_as_string (decl, v) + tree decl; + int v; +{ + OB_INIT (); + + dump_decl (decl, v); + + OB_FINISH (); + + return (char *)obstack_base (&scratch_obstack); +} + +char * +cp_file_of (t) + tree t; +{ + if (TREE_CODE (t) == PARM_DECL) + return DECL_SOURCE_FILE (DECL_CONTEXT (t)); + else if (TREE_CODE_CLASS (TREE_CODE (t)) == 't') + return DECL_SOURCE_FILE (TYPE_NAME (t)); + else + return DECL_SOURCE_FILE (t); +} + +int +cp_line_of (t) + tree t; +{ + if (TREE_CODE (t) == PARM_DECL) + return DECL_SOURCE_LINE (DECL_CONTEXT (t)); + else if (TREE_CODE_CLASS (TREE_CODE (t)) == 't') + return DECL_SOURCE_LINE (TYPE_NAME (t)); + else + return DECL_SOURCE_LINE (t); +} + +char * +code_as_string (c, v) + enum tree_code c; + int v; +{ + return tree_code_name [c]; +} + +char * +language_as_string (c, v) + enum languages c; +{ + switch (c) + { + case lang_c: + return "C"; + + case lang_cplusplus: + return "C++"; + + default: + my_friendly_abort (355); + } +} + +/* Return the proper printed version of a parameter to a C++ function. */ +char * +parm_as_string (p, v) + int p; +{ + if (p < 0) + return "`this'"; + + sprintf (digit_buffer, "%d", p+1); + return digit_buffer; +} + +char * +op_as_string (p, v) + enum tree_code p; +{ + static char buf[] = "operator "; + + if (p == 0) + return "<unknown>"; + + strcpy (buf + 9, opname_tab [p]); + return buf; +} + +char * +args_as_string (p, v) + tree p; + int v; +{ + if (p == NULL_TREE) + return "..."; + + return type_as_string (p, v); +} diff --git a/gcc/cp/except.c b/gcc/cp/except.c new file mode 100644 index 0000000..4d956fc --- /dev/null +++ b/gcc/cp/except.c @@ -0,0 +1,1224 @@ +/* Handle exceptional things in C++. + Copyright (C) 1989, 1992, 1993 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* High-level class interface. */ + +#include "config.h" +#include "tree.h" +#include "rtl.h" +#include "cp-tree.h" +#include "flags.h" +/* On Suns this can get you to the right definition if you + set the right value for TARGET. */ +#include <setjmp.h> +#ifdef sequent +/* Can you believe they forgot this? */ +#define _JBLEN 11 +#endif + +#ifndef _JBLEN +#define _JBLEN (sizeof(jmp_buf)/sizeof(int)) +#endif + +#undef NULL +#define NULL (char *)0 + +/* This should be part of `ansi_opname', or at least be defined by the std. */ +#define EXCEPTION_NAME_PREFIX "__ex" +#define EXCEPTION_NAME_LENGTH 4 + +void init_exception_processing (); +void init_exception_processing_1 (); + +/* If non-zero, a VAR_DECL whose cleanup will cause a throw to the + next exception handler. Its value says whether to throw or not. + In the case of functions which do not issue a RAISE, it should be + possible to optimize away this VAR_DECL (and overhead associated + with it). */ +tree exception_throw_decl; +/* Use this to know that we did not set `exception_throw_decl', + until GCC optimizer is smart enough to figure it out for itself. */ +int sets_exception_throw_decl; + +/* The exception `type' currently in scope, or NULL_TREE if none. */ +tree current_exception_type; + +/* The exception handler object for the given scope. */ +tree current_exception_decl; +rtx current_exception_name_as_rtx; +rtx current_exception_parms_as_rtx; + +/* The ``object'' view of the current exception parameters. + We cast up from the `parms' field to `current_exception_type'. */ +tree current_exception_object; + +/* Cache `setjmp', `longjmp', `raise_exception', and `unhandled_exception' + after default conversion. Maybe later they will get built-in. */ +static tree BISJ, BILJ, BIR, BIUE; + +/* Local variables which give the appearance that exception + handling is part of the language and the execution model. */ + +/* The type of the exception handler stack. */ +tree EHS_type; + +/* The global handler stack. */ +tree EHS_decl; + +/* Cached component refs to fields of `EHS_decl'. */ +static tree EHS_prev, EHS_handler, EHS_parms, EHS_name; +static rtx EHS_parms_as_rtx, EHS_name_as_rtx; + +/* The parameter names of this exception type. */ + +static tree last_exception_fields; +static tree last_exception_field_types; + +/* When ID is VOID_TYPE_NODE, it means ``raise all''. + Cannot be inline, since it uses `alloca', and that + breaks code which pushes the result of this function + on the stack. */ +static tree +exception_object_name (prefix, id) + tree prefix; + tree id; +{ + /* First, cons up the `name' of this exception. */ + char *name; + int length = (id == void_type_node ? 3 : IDENTIFIER_LENGTH (id)) + EXCEPTION_NAME_LENGTH; + + if (prefix) + length += IDENTIFIER_LENGTH (prefix) + 2; + + name = (char *)alloca (length); + strcpy (name, EXCEPTION_NAME_PREFIX); + length = EXCEPTION_NAME_LENGTH; + if (prefix) + { + strcpy (name + length, IDENTIFIER_POINTER (prefix)); +#ifdef JOINER + name[length + IDENTIFIER_LENGTH (prefix)] = JOINER; +#else + name[length + IDENTIFIER_LENGTH (prefix)] = '_'; +#endif + length += IDENTIFIER_LENGTH (prefix) + 1; + } + if (id == void_type_node) + strcpy (name + length, "all"); + else + strcpy (name + length, IDENTIFIER_POINTER (id)); + return get_identifier (name); +} + +tree +lookup_exception_cname (ctype, cname, raise_id) + tree ctype, cname; + tree raise_id; +{ + tree this_cname = TREE_PURPOSE (raise_id); + if (this_cname == NULL_TREE) + { + if (cname) + { + tree name = TREE_VALUE (raise_id); + if (purpose_member (name, CLASSTYPE_TAGS (ctype))) + this_cname = cname; + } + } + else if (this_cname == void_type_node) + this_cname = NULL_TREE; + else if (TREE_CODE (this_cname) != IDENTIFIER_NODE) + { + sorry ("multiple scope refs in `cplus_expand_raise_stmt'"); + this_cname = error_mark_node; + } + return this_cname; +} + +tree +lookup_exception_tname (oname) + tree oname; +{ + return get_identifier (IDENTIFIER_POINTER (oname) + EXCEPTION_NAME_LENGTH); +} + +tree +lookup_exception_object (cname, name, complain) + tree cname, name; + int complain; +{ + tree oname; + tree decl; + + if (cname == void_type_node) + cname = NULL_TREE; + else if (cname && TREE_CODE (cname) != IDENTIFIER_NODE) + { + sorry ("multiple scope refs in `lookup_exception_object'"); + cname = NULL_TREE; + } + oname = exception_object_name (cname, name); + decl = IDENTIFIER_GLOBAL_VALUE (oname); + if (decl == NULL_TREE || TREE_CODE (decl) != VAR_DECL) + { + if (complain) + { + push_obstacks_nochange (); + + if (cname) + error ("no exception name object for name `%s::%s'", + IDENTIFIER_POINTER (cname), + IDENTIFIER_POINTER (name)); + else + error ("no exception name object for name `%s'", + IDENTIFIER_POINTER (name)); + end_temporary_allocation (); + /* Avoid further error messages. */ + pushdecl_top_level (build_lang_field_decl (VAR_DECL, + exception_object_name (cname, name), + error_mark_node)); + pop_obstacks (); + } + return NULL_TREE; + } + return decl; +} + +tree +lookup_exception_type (ctype, cname, raise_id) + tree ctype, cname; + tree raise_id; +{ + tree name = TREE_VALUE (raise_id); + tree purpose = TREE_PURPOSE (raise_id); + + if (cname && purpose == NULL_TREE) + purpose = cname; + + if (purpose && purpose != void_type_node) + { + tree link = NULL_TREE; + + if (TREE_CODE (purpose) != IDENTIFIER_NODE) + { + sorry ("multiple scope refs in `lookup_exception_type'"); + TREE_PURPOSE (raise_id) = NULL_TREE; + return NULL_TREE; + } + if (! is_aggr_typedef (purpose, 1)) + return NULL_TREE; + ctype = IDENTIFIER_TYPE_VALUE (purpose); + link = purpose_member (name, CLASSTYPE_TAGS (ctype)); + if (link) + return TREE_VALUE (link); + } + + ctype = lookup_name (name, 1); + if (ctype && TREE_CODE (ctype) == TYPE_DECL) + ctype = TREE_TYPE (ctype); + if (ctype && TREE_CODE (ctype) == RECORD_TYPE + && CLASSTYPE_DECLARED_EXCEPTION (ctype)) + return ctype; + return NULL_TREE; +} + +tree +finish_exception (e, list_of_fieldlists) + tree e; + tree list_of_fieldlists; +{ + tree parmtypes = NULL_TREE, name_field; + tree cname = TYPE_NAME (e); + + if (TREE_CODE (cname) == TYPE_DECL) + cname = DECL_NAME (cname); + + if (last_exception_fields) + error ("cannot declare exceptions within exceptions"); + if (list_of_fieldlists && ! ANON_AGGRNAME_P (cname)) + cp_error ("exception name `%T' must follow body declaration", e); + if (list_of_fieldlists) + { + tree prev, field; + + /* Note: no public, private, or protected allowed. */ + if (TREE_CHAIN (list_of_fieldlists)) + error ("access declarations invalid in exception declaration"); + else if (TREE_PURPOSE (list_of_fieldlists) != (tree)access_default) + error ("access declarations invalid in exception declaration"); + TREE_PURPOSE (list_of_fieldlists) = (tree)access_default; + + /* Note also: no member function declarations allowed. */ + for (prev = 0, field = TREE_VALUE (list_of_fieldlists); + field; prev = field, field = TREE_CHAIN (field)) + { + switch (TREE_CODE (field)) + { + case FIELD_DECL: + /* ok. */ + parmtypes = tree_cons (NULL_TREE, TREE_TYPE (field), parmtypes); + continue; + case FUNCTION_DECL: + cp_error ("declaration of function `%D' in exception invalid", + field); + break; + case VAR_DECL: + if (TREE_STATIC (field)) + cp_error ("declaration of static variable `%D' in exception invalid", field); + else + cp_error ("declaration of constant field `%D' in exception invalid", field); + break; + case CONST_DECL: + cp_error ("declaration of enum value `%D' in exception invalid", field); + break; + case SCOPE_REF: + error ("use of `::' in exception context invalid"); + break; + } + if (prev) + TREE_CHAIN (prev) = TREE_CHAIN (field); + else + TREE_VALUE (list_of_fieldlists) = TREE_CHAIN (field); + } + } + + /* Now that we've cleaned up the fields, add a name identifier at front. */ + name_field = build_lang_field_decl (FIELD_DECL, get_identifier ("__name"), + ptr_type_node); + if (list_of_fieldlists) + { + TREE_CHAIN (name_field) = TREE_VALUE (list_of_fieldlists); + TREE_VALUE (list_of_fieldlists) = name_field; + } + else + list_of_fieldlists = build_tree_list (NULL_TREE, name_field); + + last_exception_fields = TREE_VALUE (list_of_fieldlists); + if (parmtypes) + { + last_exception_field_types = nreverse (parmtypes); + /* Set the TREE_CHAIN of what is now at the end of the + list to `void_list_node'. */ + TREE_CHAIN (parmtypes) = void_list_node; + } + else + last_exception_field_types = void_list_node; + + popclass (0); + +#if 0 + /* Remove aggregate types from the list of tags, + since these appear at global scope. */ + while (x && IS_AGGR_TYPE (TREE_VALUE (x))) + x = TREE_CHAIN (x); + CLASSTYPE_TAGS (t) = x; + y = x; + while (x) + { + if (IS_AGGR_TYPE (TREE_VALUE (x))) + TREE_CHAIN (y) = TREE_CHAIN (x); + x = TREE_CHAIN (x); + } +#endif + + if (flag_cadillac) + cadillac_finish_exception (e); + + return e; +} + +void +finish_exception_decl (cname, decl) + tree cname, decl; +{ + /* In cp-decl.h. */ + extern tree last_function_parms; + + /* An exception declaration. */ + tree t, ctor; + tree parmdecls = NULL_TREE, fields; + tree list_of_fieldlists = temp_tree_cons (NULL_TREE, + copy_list (last_exception_fields), + NULL_TREE); + tree edecl = build_lang_field_decl (VAR_DECL, + exception_object_name (cname, DECL_NAME (decl)), + ptr_type_node); + + DECL_LANGUAGE (edecl) = lang_c; + TREE_STATIC (edecl) = 1; + TREE_PUBLIC (edecl) = 1; + finish_decl (pushdecl (edecl), NULL_TREE, NULL_TREE, 0); + + /* Now instantiate the exception decl. */ + t = xref_tag (exception_type_node, DECL_NAME (decl), NULL_TREE, 0); + + /* finish_struct will pop this. */ + pushclass (t, 0); + + /* Now add a constructor which takes as parameters all the types we + just defined. */ + ctor = build_lang_decl (FUNCTION_DECL, DECL_NAME (decl), + build_cplus_method_type (t, TYPE_POINTER_TO (t), + last_exception_field_types)); + /* Don't take `name'. The constructor handles that. */ + fields = TREE_CHAIN (TREE_VALUE (list_of_fieldlists)); + while (fields) + { + tree parm = build_decl (PARM_DECL, DECL_NAME (fields), TREE_TYPE (fields)); + /* Since there is a prototype, args are passed in their own types. */ + DECL_ARG_TYPE (parm) = TREE_TYPE (parm); +#ifdef PROMOTE_PROTOTYPES + if ((TREE_CODE (TREE_TYPE (fields)) == INTEGER_TYPE + || TREE_CODE (TREE_TYPE (fields)) == ENUMERAL_TYPE) + && TYPE_PRECISION (TREE_TYPE (fields)) < TYPE_PRECISION (integer_type_node)) + DECL_ARG_TYPE (parm) = integer_type_node; +#endif + TREE_CHAIN (parm) = parmdecls; + parmdecls = parm; + fields = TREE_CHAIN (fields); + } + fields = TREE_VALUE (list_of_fieldlists); + last_function_parms = nreverse (parmdecls); + + DECL_CONSTRUCTOR_P (ctor) = 1; + TYPE_HAS_CONSTRUCTOR (t) = 1; + grokclassfn (t, DECL_NAME (decl), ctor, NO_SPECIAL, NULL_TREE); + DECL_EXTERNAL (ctor) = 1; + TREE_STATIC (ctor) = 1; + TREE_PUBLIC (ctor) = 0; + DECL_INLINE (ctor) = 1; + make_decl_rtl (ctor, NULL_PTR, 1); + finish_decl (ctor, NULL_TREE, NULL_TREE, 0); + TREE_CHAIN (ctor) = TREE_VALUE (list_of_fieldlists); + TREE_VALUE (list_of_fieldlists) = ctor; + + finish_struct (t, list_of_fieldlists, 0); + + if (current_function_decl) + error ("cannot define exception inside function scope"); + else + { + enum debug_info_type old_write_symbols = write_symbols; + write_symbols = NO_DEBUG; + + /* Now build the constructor for this exception. */ + parmdecls = DECL_ARGUMENTS (ctor); + start_function (NULL_TREE, ctor, 0, 1); + store_parm_decls (); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + + /* Move all the parameters to the fields, skipping `this'. */ + parmdecls = TREE_CHAIN (parmdecls); + /* Install `name' of this exception handler. */ + DECL_INITIAL (fields) = build_unary_op (ADDR_EXPR, edecl, 0); + fields = TREE_CHAIN (fields); + /* Install all the values. */ + while (fields) + { + /* Set up the initialization for this field. */ + DECL_INITIAL (fields) = parmdecls; + fields = TREE_CHAIN (fields); + parmdecls = TREE_CHAIN (parmdecls); + } + emit_base_init (t, 0); + + finish_function (DECL_SOURCE_LINE (ctor), 1); + write_symbols = old_write_symbols; + } +} + +void +end_exception_decls () +{ + last_exception_field_types = NULL_TREE; + last_exception_fields = NULL_TREE; +} + +/* Statement-level exception semantics. */ + +void +cplus_expand_start_try (implicit) + int implicit; +{ + tree call_to_setjmp; + tree handler, ref; + + /* Start a new block enclosing the whole handler. */ + if (implicit) + { + pushlevel_temporary (1); + } + else + { + pushlevel (0); + clear_last_expr (); + push_momentary (); + + /* Encompass whole exception handler in one big binding contour. + If RAISE should throw out of the whole TRY/EXCEPT block, call + `expand_start_bindings' with argument of 1. */ + expand_start_bindings (0); + } + + /* Allocate handler in that block. It's real name will come later. + Note that it will be the first name in this binding contour. */ + handler = get_temp_name (EHS_type, 0); + DECL_INITIAL (handler) = error_mark_node; + finish_decl (handler, NULL_TREE, NULL_TREE, 0); + + /* Must come after call to `finish_decl', else the cleanup for the temp + for the handler will cause the contour we just created to be popped. */ + if (implicit) + declare_implicit_exception (); + + /* Catch via `setjmp'. */ + ref = build_component_ref (handler, get_identifier ("handler"), NULL_TREE, 0); + call_to_setjmp = build_function_call (BISJ, build_tree_list (NULL_TREE, ref)); + + /* RAISE throws to EXCEPT part. */ + expand_start_try (build_binary_op (EQ_EXPR, call_to_setjmp, integer_zero_node, 1), 0, 1); +} + +/* If KEEP is 1, then declarations in the TRY statement are worth keeping. + If KEEP is 2, then the TRY statement was generated by the compiler. + If KEEP is 0, the declarations in the TRY statement contain errors. */ + +tree +cplus_expand_end_try (keep) + int keep; +{ + tree decls, decl, block; + + if (keep < 2) + pop_implicit_try_blocks (NULL_TREE); + + decls = getdecls (); + + /* Emit code to avoid falling through into a default + handler that might come later. */ + expand_end_try (); + + /* Pops binding contour local to TRY, and get the exception handler + object built by `...start_try'. */ + switch (keep) + { + case 0: + expand_end_bindings (decls, 0, 1); + block = poplevel (0, 0, 0); + pop_momentary (); + decl = getdecls (); + break; + + case 1: + expand_end_bindings (decls, 1, 1); + block = poplevel (1, 1, 0); + pop_momentary (); + decl = getdecls (); + break; + + default: + decl = tree_last (decls); + block = NULL_TREE; + break; + } + + my_friendly_assert (TREE_CODE (decl) == VAR_DECL + && TREE_TYPE (decl) == EHS_type, 203); + if (block) + { + BLOCK_HANDLER_BLOCK (block) = 1; + TREE_USED (block) = 1; + } + + /* Pass it back so that its rtl can be bound to its name + (or vice versa). */ + return decl; +} + +void +cplus_expand_start_except (name, decl) + tree name, decl; +{ + int yes; + tree tmp, init; + + expand_start_except (0, 1); + + /* This is internal `eh'. */ + current_exception_decl = decl; + current_exception_name_as_rtx + = expand_expr (build (COMPONENT_REF, ptr_type_node, + current_exception_decl, TREE_OPERAND (EHS_name, 1)), + 0, 0, 0); + init = build (COMPONENT_REF, ptr_type_node, decl, TREE_OPERAND (EHS_parms, 1)); + current_exception_parms_as_rtx = expand_expr (init, 0, 0, 0); + + if (name) + { + /* Get the exception object into scope (user declared `ex'). */ + tmp = pushdecl (build_decl (VAR_DECL, name, ptr_type_node)); + DECL_INITIAL (tmp) = error_mark_node; + finish_decl (tmp, init, 0, 0); + } + current_exception_type = NULL_TREE; + yes = suspend_momentary (); + if (name) + { + /* From now on, send the user to our faked-up object. */ + current_exception_object = build1 (INDIRECT_REF, void_type_node, tmp); + IDENTIFIER_LOCAL_VALUE (name) = current_exception_object; + } + resume_momentary (yes); + + /* Pop exception handler stack. */ + expand_assignment (EHS_decl, EHS_prev, 0, 0); +} + +/* Generate the call to `unhandled_exception' that is appropriate + for this particular unhandled exception. */ +static tree +call_to_unhandled_exception () +{ + extern int lineno; + extern tree combine_strings (); + tree parms = tree_cons (NULL_TREE, + combine_strings (build_string (strlen (input_filename + 1), input_filename)), + build_tree_list (NULL_TREE, build_int_2 (lineno, 0))); + return build_function_call (BIUE, parms); +} + +/* Note that this must be mirror image of `...start_try'. + DFAULT is the default clause, if there was one. + DFAULT is ERROR_MARK_NODE when this ends an implicit handler. */ +void +cplus_expand_end_except (dfault) + tree dfault; +{ + extern tree expand_end_except (); /* stmt.c. */ + tree decls, raised; + + if (dfault == NULL_TREE) + { + /* Uncaught exception at outermost level. If raised locally, + reraise the exception. Otherwise, generate code to call `abort'. */ + if (in_try_block (1) == 0) + { + expand_start_cond (build (EQ_EXPR, integer_type_node, + exception_throw_decl, integer_zero_node), 0); + expand_expr (call_to_unhandled_exception (), 0, VOIDmode, 0); + expand_end_cond (); + } + /* Try the next handler. */ + if (! expand_escape_except ()) + compiler_error ("except nesting botch"); + } + + raised = expand_end_except (); + + decls = getdecls (); + expand_end_bindings (decls, decls != 0, 1); + poplevel (decls != 0, 1, 0); + + /* Implicit handlers do not use the momentary obstack. */ + if (dfault != error_mark_node) + pop_momentary (); + + if (! in_try_block (1)) + { + /* Check that this function is not raising exceptions + it is not supposed to. */ + while (raised) + { + cp_error ("exception `%D' raised but not declared raisable", + TREE_VALUE (raised)); + raised = TREE_CHAIN (raised); + } + } + else if (dfault == NULL_TREE || dfault == error_mark_node) + { + expand_start_cond (build (NE_EXPR, integer_type_node, + exception_throw_decl, + integer_zero_node), 0); + /* We fell off the end of this try block. Try going to the next. + The escape_label will be the beginning of the next try block. */ + if (! expand_escape_except ()) + compiler_error ("except nesting botch"); + expand_end_cond (); + } +} + +/* Generate code to raise exception RAISE_ID. + If EXP is NULL_TREE, then PARMS is the list of parameters to use + for constructing this exception. + If EXP is non-NULL, then it is an already constructed object + of the kind that we want. + + FOR_RERAISE is non-zero if this raise is called by reraise. In + this case we do not need to emit extra gotos to avoid warning messages; + the caller will do that once after all the exceptions it reraises + are handled and raised. */ +void +cplus_expand_raise (raise_id, parms, exp, for_reraise) + tree raise_id; + tree parms; + tree exp; + int for_reraise; +{ + /* Allocate new exception of appropriate type, passing + PARMS to its constructor. */ + tree cname, name; + tree decl; + tree xexp = exp; + + cname = lookup_exception_cname (current_class_type, current_class_name, raise_id); + if (cname == error_mark_node) + return; + name = TREE_VALUE (raise_id); + + decl = lookup_exception_object (cname, name, 1); + if (decl == NULL_TREE) + return; + + if (exp == NULL_TREE) + { + exp = build_method_call (NULL_TREE, name, parms, NULL_TREE, LOOKUP_COMPLAIN); + if (exp == error_mark_node) + return; + } + + if (in_try_block (1)) + { + expand_raise (decl); + } + else if (! current_function_decl) + { + if (xexp == NULL_TREE) + cp_error ("invalid raise of `%D' outside of functions", decl); + else + cp_error ("invalid reraise of `%D' outside of functions", decl); + } + else + { + /* Test this raise against what this function permits. */ + tree names = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)); + while (names) + { + if (decl == TREE_TYPE (names)) + break; + names = TREE_CHAIN (names); + } + if (names == NULL_TREE) + { + error ("current function not declared to raise exception `%s'", + IDENTIFIER_POINTER (name)); + return; + } + } + + store_expr (exp, EHS_parms_as_rtx, 0); + + /* Set the global exception handler stack's NAME field + to the `name' of this exception. The global exception + handler stack is the container for the exception object + we just built. + + We go through a function call to make life easier when debugging. */ +#if 0 + expand_assignment (EHS_name, build_unary_op (ADDR_EXPR, decl, 0), 0, 0); +#else + parms = tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, EHS_name, 0), + build_tree_list (NULL_TREE, + build_unary_op (ADDR_EXPR, decl, 0))); + expand_expr (build_function_call (BIR, parms), 0, 0, 0); +#endif + + /* Activate thrower. If we are inside a TRY statement, + we can cheat and not do this, saving a longjmp. */ + if (in_try_block (1) == 0) + { + sets_exception_throw_decl = 1; + emit_move_insn (DECL_RTL (exception_throw_decl), const1_rtx); + } + + if (xexp == NULL_TREE) + { + /* Invoke destructors for current procedure or handler. */ + if (! expand_escape_except ()) + compiler_error ("except nesting botch"); + /* Throw via `longjmp'... Done as side-effect of goto. */ + } + /* To avoid spurious warning messages, we add a goto to the end + of the function. This code is dead, and the compiler should + know how to delete it, but for now, we are stuck with it. */ + if (! for_reraise + && TREE_TYPE (DECL_RESULT (current_function_decl)) != void_type_node) + expand_null_return (); +} + +extern tree cplus_exception_name (); + +tree +ansi_exception_object_lookup (type) + tree type; +{ + tree raise_id = cplus_exception_name (type); + tree decl; + + decl = IDENTIFIER_GLOBAL_VALUE (raise_id); + if (decl == NULL_TREE || TREE_CODE (decl) != VAR_DECL) + { + push_obstacks_nochange (); + end_temporary_allocation (); + decl = build_decl (VAR_DECL, raise_id, ptr_type_node); + TREE_PUBLIC (decl) = 1; + TREE_STATIC (decl) = 1; + pushdecl_top_level (decl); + make_decl_rtl (decl, (char*)0, 1); + pop_obstacks (); + } + return decl; +} + +/* Generate code to throw an exception using EXP. + Usng ANSI syntax and semantics. + If EXP is NULL_TREE< re-raise instead. */ + +void +cplus_expand_throw (exp) + tree exp; +{ + tree parms; + int for_reraise; + /* Allocate new exception of appropriate type, passing + PARMS to its constructor. */ + tree decl = ansi_exception_object_lookup (TREE_TYPE (exp)); + tree xexp = exp; + + if (in_try_block (1)) + { +#if 1 + my_friendly_abort (35); +#else + expand_raise (decl); +#endif + } + else if (! current_function_decl) + error ("invalid throw outside of functions"); + else + { +#if 0 + /* Test this raise against what this function permits. */ + tree names = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)); + while (names) + { + if (decl == TREE_TYPE (names)) + break; + names = TREE_CHAIN (names); + } + if (names == NULL_TREE) + { + error ("current function not declared to raise exception `%s'", + IDENTIFIER_POINTER (name)); + return; + } +#endif + } + + store_expr (exp, EHS_parms_as_rtx, 0); + + /* Set the global exception handler stack's NAME field + to the `name' of this exception. The global exception + handler stack is the container for the exception object + we just built. + + We go through a function call to make life easier when debugging. */ +#if 0 + expand_assignment (EHS_name, build_unary_op (ADDR_EXPR, decl, 0), 0, 0); +#else + parms = tree_cons (NULL_TREE, build_unary_op (ADDR_EXPR, EHS_name, 0), + build_tree_list (NULL_TREE, + build_unary_op (ADDR_EXPR, decl, 0))); + expand_expr (build_function_call (BIR, parms), 0, 0, 0); +#endif + + /* Activate thrower. If we are inside a TRY statement, + we can cheat and not do this, saving a longjmp. */ + if (in_try_block (1) == 0) + { + sets_exception_throw_decl = 1; + emit_move_insn (DECL_RTL (exception_throw_decl), const1_rtx); + } + + if (xexp == NULL_TREE) + { + /* Invoke destructors for current procedure or handler. */ + if (! expand_escape_except ()) + compiler_error ("except nesting botch"); + /* Throw via `longjmp'... Done as side-effect of goto. */ + } + + /* XXX: for_reraise is never set above here. */ + /* To avoid spurious warning messages, we add a goto to the end + of the function. This code is dead, and the compiler should + know how to delete it, but for now, we are stuck with it. */ + if (! for_reraise + && TREE_TYPE (DECL_RESULT (current_function_decl)) != void_type_node) + expand_null_return (); +} + +tree +cplus_expand_start_catch (raise_id) + tree raise_id; +{ + tree cname = lookup_exception_cname (current_class_type, current_class_name, raise_id); + tree decl; + tree cond; + + if (cname == error_mark_node) + { + decl = error_mark_node; + cond = error_mark_node; + } + else + { + decl = lookup_exception_object (cname, TREE_VALUE (raise_id), 1); + if (decl == NULL_TREE) + cond = error_mark_node; + else + cond = build_binary_op (EQ_EXPR, build_unary_op (ADDR_EXPR, decl, 0), + build (COMPONENT_REF, ptr_type_node, + current_exception_decl, + TREE_OPERAND (EHS_name, 1)), + 1); + } + expand_start_cond (cond, 0); + + /* Does nothing right now. */ + expand_catch (decl); + if (current_exception_type + && TYPE_NEEDS_DESTRUCTOR (current_exception_type)) + { + /* Make a cleanup for the name-specific exception object now in scope. */ + tree cleanup = maybe_build_cleanup (current_exception_object); + expand_start_bindings (0); + expand_decl_cleanup (NULL_TREE, cleanup); + } + return decl; +} +tree +ansi_expand_start_catch (raise_type) + tree raise_type; +{ + tree decl = ansi_exception_object_lookup (raise_type); + tree cond; + + if (decl == NULL_TREE) + cond = error_mark_node; + else + cond = build_binary_op (EQ_EXPR, build_unary_op (ADDR_EXPR, decl, 0), + build (COMPONENT_REF, ptr_type_node, + current_exception_decl, + TREE_OPERAND (EHS_name, 1)), + 1); + expand_start_cond (cond, 0); + + /* Does nothing right now. */ + expand_catch (decl); + return decl; +} + +void +cplus_expand_end_catch (for_reraise) + int for_reraise; +{ + if (current_exception_type + && TYPE_NEEDS_DESTRUCTOR (current_exception_type)) + { + /* Destroy the specific exception object now in scope. */ + expand_end_bindings (getdecls (), 0, 1); + } + if (for_reraise) + { + if (! expand_escape_except ()) + my_friendly_abort (36); + } + else + { + if (! expand_end_catch ()) + my_friendly_abort (37); + } + expand_end_cond (); +} + +/* Reraise an exception. + If EXCEPTIONS is NULL_TREE, it means reraise whatever exception was caught. + If EXCEPTIONS is an IDENTIFIER_NODE, it means reraise the exception + object named by EXCEPTIONS. This must be a variable declared in + an `except' clause. + If EXCEPTIONS is a TREE_LIST, it is the list of exceptions we are + willing to reraise. */ + +void +cplus_expand_reraise (exceptions) + tree exceptions; +{ + tree ex_ptr; + tree ex_object = current_exception_object; + rtx ex_ptr_as_rtx; + + if (exceptions && TREE_CODE (exceptions) == IDENTIFIER_NODE) + { + /* Don't get tripped up if its TREE_TYPE is `error_mark_node'. */ + ex_object = IDENTIFIER_LOCAL_VALUE (exceptions); + if (ex_object == NULL_TREE || TREE_CODE (ex_object) != INDIRECT_REF) + { + error ("`%s' is not an exception decl", IDENTIFIER_POINTER (exceptions)); + return; + } + my_friendly_assert (TREE_CODE (TREE_OPERAND (ex_object, 0)) == VAR_DECL, + 204); + exceptions = NULL_TREE; + } + + ex_ptr = build1 (NOP_EXPR, ptr_type_node, TREE_OPERAND (ex_object, 0)); + ex_ptr_as_rtx = expand_expr (ex_ptr, 0, 0, 0); + + /* reraise ALL, used by compiler. */ + if (exceptions == NULL_TREE) + { + /* Now treat reraise like catch/raise. */ + expand_catch (error_mark_node); + expand_raise (error_mark_node); + emit_move_insn (EHS_name_as_rtx, current_exception_name_as_rtx); + store_expr ((tree) EHS_parms_as_rtx, current_exception_parms_as_rtx, 0); + if (in_try_block (1) == 0) + { + sets_exception_throw_decl = 1; + emit_move_insn (DECL_RTL (exception_throw_decl), const1_rtx); + } + /* Set to zero so that destructor will not be called. */ + emit_move_insn (ex_ptr_as_rtx, const0_rtx); + if (! expand_escape_except ()) + my_friendly_abort (38); + + /* To avoid spurious warning messages, we add a goto to the end + of the function. This code is dead, and the compiler should + know how to delete it, but for now, we are stuck with it. */ + if (TREE_TYPE (DECL_RESULT (current_function_decl)) != void_type_node) + expand_null_return (); + + return; + } + + /* reraise from a list of exceptions. */ + while (exceptions) + { + tree type = lookup_exception_type (current_class_type, current_class_name, + exceptions); + if (type == NULL_TREE) + { + error ("`%s' is not an exception type", + IDENTIFIER_POINTER (TREE_VALUE (exceptions))); + current_exception_type = NULL_TREE; + TREE_TYPE (ex_object) = error_mark_node; + TREE_TYPE (ex_ptr) = error_mark_node; + } + else + { + current_exception_type = type; + /* In-place union. */ + TREE_TYPE (ex_object) = type; + TREE_TYPE (ex_ptr) = TYPE_POINTER_TO (type); + } + + /* Now treat reraise like catch/raise. */ + cplus_expand_start_catch (exceptions); + cplus_expand_raise (exceptions, NULL_TREE, ex_ptr, 1); + /* Set to zero so that destructor will not be called. */ + if (TREE_TYPE (ex_ptr) != error_mark_node) + emit_move_insn (ex_ptr_as_rtx, const0_rtx); + cplus_expand_end_catch (1); + exceptions = TREE_CHAIN (exceptions); + } + /* Don't propagate any unhandled exceptions. */ + expand_expr (call_to_unhandled_exception (), 0, VOIDmode, 0); + + /* To avoid spurious warning messages, we add a goto to the end + of the function. This code is dead, and the compiler should + know how to delete it, but for now, we are stuck with it. */ + if (TREE_TYPE (DECL_RESULT (current_function_decl)) != void_type_node) + expand_null_return (); +} + +void +setup_exception_throw_decl () +{ + tree call_to_longjmp, parms; + + int old = suspend_momentary (); + + exception_throw_decl = build_decl (VAR_DECL, get_identifier (THROW_NAME), integer_type_node); + pushdecl (exception_throw_decl); + parms = tree_cons (NULL_TREE, EHS_handler, + build_tree_list (0, integer_one_node)); + call_to_longjmp = build_function_call (BILJ, parms); + + expand_decl (exception_throw_decl); + expand_decl_cleanup (exception_throw_decl, + build (COND_EXPR, void_type_node, + exception_throw_decl, + call_to_longjmp, integer_zero_node)); + DECL_INITIAL (exception_throw_decl) = integer_zero_node; + sets_exception_throw_decl = 0; + resume_momentary (old); + + /* Cache these, since they won't change throughout the function. */ + EHS_parms_as_rtx = expand_expr (EHS_parms, 0, 0, 0); + EHS_name_as_rtx = expand_expr (EHS_name, 0, 0, 0); +} + +void +init_exception_processing () +{ + extern tree build_function_type (), define_function (); + extern tree unhandled_exception_fndecl; + tree cname = get_identifier ("ExceptionHandler"); + tree field, chain; + tree ctor, dtor; + tree jmp_buf_type = build_array_type (integer_type_node, + build_index_type (build_int_2 (_JBLEN-1, 0))); + tree jmp_buf_arg_type = build_pointer_type (integer_type_node); + + tree parmtypes = hash_tree_chain (jmp_buf_arg_type, void_list_node); + tree setjmp_fndecl, longjmp_fndecl, raise_fndecl; + + int old_interface_only = interface_only; + int old_interface_unknown = interface_unknown; + interface_only = 1; + interface_unknown = 0; + EHS_type = xref_tag (record_type_node, cname, NULL_TREE, 0); + push_lang_context (lang_name_c); + setjmp_fndecl = define_function ("setjmp", + build_function_type (integer_type_node, + parmtypes), + NOT_BUILT_IN, pushdecl, 0); + BISJ = default_conversion (setjmp_fndecl); + parmtypes = hash_tree_chain (jmp_buf_arg_type, + hash_tree_chain (integer_type_node, void_list_node)); + longjmp_fndecl = define_function ("longjmp", + build_function_type (void_type_node, parmtypes), + NOT_BUILT_IN, pushdecl, 0); + raise_fndecl = define_function ("__raise_exception", + build_function_type (void_type_node, + hash_tree_chain (ptr_type_node, + hash_tree_chain (build_pointer_type (ptr_type_node), void_list_node))), + NOT_BUILT_IN, pushdecl, 0); + BILJ = default_conversion (longjmp_fndecl); + BIR = default_conversion (raise_fndecl); + BIUE = default_conversion (unhandled_exception_fndecl); + + pop_lang_context (); + + /* finish_struct will pop this. */ + pushclass (EHS_type, 0); + field = build_lang_field_decl (FIELD_DECL, get_identifier ("parms"), ptr_type_node); + chain = field; + field = build_lang_field_decl (FIELD_DECL, get_identifier ("name"), + build_pointer_type (default_function_type)); + TREE_CHAIN (field) = chain; + chain = field; + field = build_lang_field_decl (FIELD_DECL, get_identifier ("handler"), jmp_buf_type); + TREE_CHAIN (field) = chain; + chain = field; + field = build_lang_field_decl (FIELD_DECL, get_identifier ("prev"), + TYPE_POINTER_TO (EHS_type)); + TREE_CHAIN (field) = chain; + chain = field; + + ctor = build_lang_decl (FUNCTION_DECL, cname, + build_cplus_method_type (EHS_type, TYPE_POINTER_TO (EHS_type), void_list_node)); + DECL_CONSTRUCTOR_P (ctor) = 1; + TREE_STATIC (ctor) = 1; + TREE_PUBLIC (ctor) = 1; + DECL_EXTERNAL (ctor) = 1; + grokclassfn (EHS_type, cname, ctor, NO_SPECIAL, 0); + grok_ctor_properties (EHS_type, ctor); + finish_decl (pushdecl (ctor), NULL_TREE, NULL_TREE, 0); + /* Must copy the node here because the FUNCTION_DECL + used inside the struct ain't the same as the + FUNCTION_DECL we stick into the global binding + contour. */ + ctor = copy_node (ctor); + TREE_CHAIN (ctor) = chain; + chain = ctor; + dtor = build_lang_decl (FUNCTION_DECL, cname, + build_cplus_method_type (EHS_type, TYPE_POINTER_TO (EHS_type), void_list_node)); + TREE_STATIC (dtor) = 1; + TREE_PUBLIC (dtor) = 1; + DECL_EXTERNAL (dtor) = 1; + grokclassfn (EHS_type, cname, dtor, DTOR_FLAG, 0); + finish_decl (pushdecl (dtor), NULL_TREE, NULL_TREE, 0); + /* Copy for the same reason as copying ctor. */ + dtor = copy_node (dtor); + TREE_CHAIN (dtor) = chain; + chain = dtor; + TYPE_HAS_CONSTRUCTOR (EHS_type) = 1; + TYPE_HAS_DESTRUCTOR (EHS_type) = 1; + finish_struct (EHS_type, temp_tree_cons (NULL_TREE, chain, NULL_TREE), 0); + interface_only = old_interface_only; + interface_unknown = old_interface_unknown; +} + +void +init_exception_processing_1 () +{ + register tree EHS_id = get_identifier ("exceptionHandlerStack"); + + EHS_decl = IDENTIFIER_GLOBAL_VALUE (EHS_id); + + /* If we have no other definition, default to library implementation. */ + if (EHS_decl == NULL_TREE) + { + EHS_decl = build_decl (VAR_DECL, EHS_id, TYPE_POINTER_TO (EHS_type)); + /* If we don't push this, its definition, should it be encountered, + will not be seen. */ + EHS_decl = pushdecl (EHS_decl); + DECL_EXTERNAL (EHS_decl) = 1; + TREE_STATIC (EHS_decl) = 1; + TREE_PUBLIC (EHS_decl) = 1; + finish_decl (EHS_decl, NULL_TREE, NULL_TREE, 0); + } + else if (TREE_CODE (EHS_decl) != VAR_DECL + || TREE_TYPE (EHS_decl) != TYPE_POINTER_TO (EHS_type)) + fatal ("exception handling declarations conflict with compiler's internal model"); + + if (EHS_prev == NULL_TREE) + { + register tree EHS_DECL = build1 (INDIRECT_REF, EHS_type, EHS_decl); + EHS_prev = build_component_ref (EHS_DECL, get_identifier ("prev"), 0, 0); + EHS_handler = build_component_ref (EHS_DECL, get_identifier ("handler"), 0, 0); + EHS_parms = build_component_ref (EHS_DECL, get_identifier ("parms"), 0, 0); + EHS_name = build_component_ref (EHS_DECL, get_identifier ("name"), 0, 0); + } +} diff --git a/gcc/cp/expr.c b/gcc/cp/expr.c new file mode 100644 index 0000000..c606ef0 --- /dev/null +++ b/gcc/cp/expr.c @@ -0,0 +1,268 @@ +/* Convert language-specific tree expression to rtl instructions, + for GNU compiler. + Copyright (C) 1988, 1992, 1993 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#include "config.h" +#include "rtl.h" +#include "tree.h" +#include "flags.h" +#include "expr.h" +#include "cp-tree.h" + +#undef NULL +#define NULL 0 + +/* Hook used by expand_expr to expand language-specific tree codes. */ + +rtx +cplus_expand_expr (exp, target, tmode, modifier) + tree exp; + rtx target; + enum machine_mode tmode; + enum expand_modifier modifier; +{ + tree type = TREE_TYPE (exp); + register enum machine_mode mode = TYPE_MODE (type); + register enum tree_code code = TREE_CODE (exp); + rtx original_target = target; + int ignore = target == const0_rtx; + + if (ignore) + target = 0, original_target = 0; + + /* No sense saving up arithmetic to be done + if it's all in the wrong mode to form part of an address. + And force_operand won't know whether to sign-extend or zero-extend. */ + + if (mode != Pmode && modifier == EXPAND_SUM) + modifier = EXPAND_NORMAL; + + switch (code) + { + case NEW_EXPR: + { + /* Something needs to be initialized, but we didn't know + where that thing was when building the tree. For example, + it could be the return value of a function, or a parameter + to a function which lays down in the stack, or a temporary + variable which must be passed by reference. + + Cleanups are handled in a language-specific way: they + might be run by the called function (true in GNU C++ + for parameters with cleanups), or they might be + run by the caller, after the call (true in GNU C++ + for other cleanup needs). */ + + tree func = TREE_OPERAND (exp, 0); + tree args = TREE_OPERAND (exp, 1); + tree type = TREE_TYPE (exp), slot; + tree fn_type = TREE_TYPE (TREE_TYPE (func)); + tree return_type = TREE_TYPE (fn_type); + tree call_exp; + rtx call_target, return_target; + int pcc_struct_return = 0; + + /* The expression `init' wants to initialize what + `target' represents. SLOT holds the slot for TARGET. */ + slot = TREE_OPERAND (exp, 2); + + if (target == 0) + { + /* Should always be called with a target in BLKmode case. */ + my_friendly_assert (mode != BLKmode, 205); + my_friendly_assert (DECL_RTL (slot) != 0, 206); + + target = gen_reg_rtx (mode); + } + + /* The target the initializer will initialize (CALL_TARGET) + must now be directed to initialize the target we are + supposed to initialize (TARGET). The semantics for + choosing what CALL_TARGET is is language-specific, + as is building the call which will perform the + initialization. It is left here to show the choices that + exist for C++. */ + + if (TREE_CODE (func) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (func, 0)) == FUNCTION_DECL + && DECL_CONSTRUCTOR_P (TREE_OPERAND (func, 0))) + { + type = TYPE_POINTER_TO (type); + /* Don't clobber a value that might be part of a default + parameter value. */ + if (TREE_PERMANENT (args)) + args = tree_cons (0, build1 (ADDR_EXPR, type, slot), + TREE_CHAIN (args)); + else + TREE_VALUE (args) = build1 (ADDR_EXPR, type, slot); + call_target = 0; + } + else if (TREE_CODE (return_type) == REFERENCE_TYPE) + { + type = return_type; + call_target = 0; + } + else + { +#ifdef PCC_STATIC_STRUCT_RETURN + pcc_struct_return = 1; + call_target = 0; +#else + call_target = target; +#endif + } + if (call_target) + { + preserve_temp_slots (call_target); + + /* Make this a valid memory address now. The code below assumes + that it can compare rtx and make assumptions based on the + result. The assumptions are true only if the address was + valid to begin with. */ + call_target = validize_mem (call_target); + } + + preserve_temp_slots (DECL_RTL (slot)); + call_exp = build (CALL_EXPR, type, func, args, 0); + TREE_SIDE_EFFECTS (call_exp) = 1; + return_target = expand_expr (call_exp, call_target, mode, 0); + free_temp_slots (); + if (call_target == 0) + { + if (pcc_struct_return) + { + tree init = build (RTL_EXPR, type, 0, return_target); + TREE_ADDRESSABLE (init) = 1; + expand_aggr_init (slot, init, 0); + if (TYPE_NEEDS_DESTRUCTOR (type)) + { + init = build (RTL_EXPR, build_reference_type (type), 0, + XEXP (return_target, 0)); + init = maybe_build_cleanup (convert_from_reference (init)); + if (init != NULL_TREE) + expand_expr (init, 0, 0, 0); + } + call_target = return_target = DECL_RTL (slot); + } + else + call_target = return_target; + } + + if (call_target != return_target) + { + my_friendly_assert (! TYPE_NEEDS_CONSTRUCTING (type), 317); + if (GET_MODE (return_target) == BLKmode) + emit_block_move (call_target, return_target, expr_size (exp), + TYPE_ALIGN (type) / BITS_PER_UNIT); + else + emit_move_insn (call_target, return_target); + } + + if (TREE_CODE (return_type) == REFERENCE_TYPE) + { + tree init; + + if (GET_CODE (call_target) == REG + && REGNO (call_target) < FIRST_PSEUDO_REGISTER) + my_friendly_abort (39); + + type = TREE_TYPE (exp); + + init = build (RTL_EXPR, return_type, 0, call_target); + /* We got back a reference to the type we want. Now initialize + target with that. */ + expand_aggr_init (slot, init, 0); + } + + if (DECL_RTL (slot) != target) + emit_move_insn (DECL_RTL (slot), target); + return DECL_RTL (slot); + } + + case OFFSET_REF: + { +#if 1 + return expand_expr (default_conversion (resolve_offset_ref (exp)), + target, tmode, EXPAND_NORMAL); +#else + /* This is old crusty code, and does not handle all that the + resolve_offset_ref function does. (mrs) */ + tree base = build_unary_op (ADDR_EXPR, TREE_OPERAND (exp, 0), 0); + tree offset = build_unary_op (ADDR_EXPR, TREE_OPERAND (exp, 1), 0); + return expand_expr (build (PLUS_EXPR, TREE_TYPE (exp), base, offset), + target, tmode, EXPAND_NORMAL); +#endif + } + + default: + break; + } + my_friendly_abort (40); + /* NOTREACHED */ + return NULL; +} + +void +init_cplus_expand () +{ + lang_expand_expr = cplus_expand_expr; +} + +/* If DECL had its rtl moved from where callers expect it + to be, fix it up. RESULT is the nominal rtl for the RESULT_DECL, + which may be a pseudo instead of a hard register. */ + +void +fixup_result_decl (decl, result) + tree decl; + rtx result; +{ + if (REG_P (result)) + { + if (REGNO (result) >= FIRST_PSEUDO_REGISTER) + { + rtx real_decl_result; + +#ifdef FUNCTION_OUTGOING_VALUE + real_decl_result + = FUNCTION_OUTGOING_VALUE (TREE_TYPE (decl), current_function_decl); +#else + real_decl_result + = FUNCTION_VALUE (TREE_TYPE (decl), current_function_decl); +#endif + REG_FUNCTION_VALUE_P (real_decl_result) = 1; + result = real_decl_result; + } + emit_move_insn (result, DECL_RTL (decl)); + emit_insn (gen_rtx (USE, VOIDmode, result)); + } +} + +/* Return nonzero iff DECL is memory-based. The DECL_RTL of + certain const variables might be a CONST_INT, or a REG + in some cases. We cannot use `memory_operand' as a test + here because on most RISC machines, a variable's address + is not, by itself, a legitimate address. */ +int +decl_in_memory_p (decl) + tree decl; +{ + return DECL_RTL (decl) != 0 && GET_CODE (DECL_RTL (decl)) == MEM; +} diff --git a/gcc/cp/gxx.gperf b/gcc/cp/gxx.gperf new file mode 100644 index 0000000..20eadb6 --- /dev/null +++ b/gcc/cp/gxx.gperf @@ -0,0 +1,91 @@ +%{ +/* Command-line: gperf -p -j1 -g -o -t -N is_reserved_word -k1,4,$,7 gplus.gperf */ +%} +struct resword { char *name; short token; enum rid rid;}; +%% +__alignof, ALIGNOF, NORID +__alignof__, ALIGNOF, NORID +__asm, GCC_ASM_KEYWORD, NORID +__asm__, GCC_ASM_KEYWORD, NORID +__attribute, ATTRIBUTE, NORID +__attribute__, ATTRIBUTE, NORID +__classof, CLASSOF, NORID +__classof__, CLASSOF, NORID +__const, TYPE_QUAL, RID_CONST +__const__, TYPE_QUAL, RID_CONST +__extension__, EXTENSION, NORID +__headof, HEADOF, NORID +__headof__, HEADOF, NORID +__inline, SCSPEC, RID_INLINE +__inline__, SCSPEC, RID_INLINE +__label__, LABEL, NORID +__signed, TYPESPEC, RID_SIGNED +__signed__, TYPESPEC, RID_SIGNED +__typeof, TYPEOF, NORID +__typeof__, TYPEOF, NORID +__volatile, TYPE_QUAL, RID_VOLATILE +__volatile__, TYPE_QUAL, RID_VOLATILE +__wchar_t, TYPESPEC, RID_WCHAR /* Unique to ANSI C++ */, +all, ALL, NORID /* Extension */, +except, EXCEPT, NORID /* Extension */, +exception, AGGR, RID_EXCEPTION /* Extension */, +raise, RAISE, NORID /* Extension */, +raises, RAISES, NORID /* Extension */, +reraise, RERAISE, NORID /* Extension */, +throw, THROW, NORID /* Extension */, +try, TRY, NORID /* Extension */, +asm, ASM_KEYWORD, NORID, +auto, SCSPEC, RID_AUTO, +break, BREAK, NORID, +case, CASE, NORID, +catch, CATCH, NORID, +char, TYPESPEC, RID_CHAR, +class, AGGR, RID_CLASS, +classof, CLASSOF, NORID, +const, TYPE_QUAL, RID_CONST, +continue, CONTINUE, NORID, +default, DEFAULT, NORID, +delete, DELETE, NORID, +do, DO, NORID, +double, TYPESPEC, RID_DOUBLE, +dynamic_cast, DYNAMIC_CAST, NORID, +else, ELSE, NORID, +enum, ENUM, NORID, +extern, SCSPEC, RID_EXTERN, +float, TYPESPEC, RID_FLOAT, +for, FOR, NORID, +friend, SCSPEC, RID_FRIEND, +goto, GOTO, NORID, +headof, HEADOF, NORID, +if, IF, NORID, +inline, SCSPEC, RID_INLINE, +int, TYPESPEC, RID_INT, +long, TYPESPEC, RID_LONG, +mutable, SCSPEC, RID_MUTABLE, +new, NEW, NORID, +operator, OPERATOR, NORID, +overload, OVERLOAD, NORID, +private, VISSPEC, RID_PRIVATE, +protected, VISSPEC, RID_PROTECTED, +public, VISSPEC, RID_PUBLIC, +register, SCSPEC, RID_REGISTER, +return, RETURN, NORID, +short, TYPESPEC, RID_SHORT, +signature, AGGR, RID_SIGNATURE /* Extension */, +signed, TYPESPEC, RID_SIGNED, +sigof, SIGOF, NORID /* Extension */, +sizeof, SIZEOF, NORID, +static, SCSPEC, RID_STATIC, +struct, AGGR, RID_RECORD, +switch, SWITCH, NORID, +this, THIS, NORID, +template, TEMPLATE, NORID, +typedef, SCSPEC, RID_TYPEDEF, +typeof, TYPEOF, NORID, +typeid, TYPEID, NORID, +union, AGGR, RID_UNION, +unsigned, TYPESPEC, RID_UNSIGNED, +virtual, SCSPEC, RID_VIRTUAL, +void, TYPESPEC, RID_VOID, +volatile, TYPE_QUAL, RID_VOLATILE, +while, WHILE, NORID, diff --git a/gcc/cp/gxxint.texi b/gcc/cp/gxxint.texi new file mode 100644 index 0000000..ef49109 --- /dev/null +++ b/gcc/cp/gxxint.texi @@ -0,0 +1,1030 @@ +\input texinfo @c -*-texinfo-*- +@c %**start of header +@setfilename g++int.info +@settitle G++ internals +@setchapternewpage odd +@c %**end of header + +@node Top, Limitations of g++, (dir), (dir) +@chapter Internal Architecture of the Compiler + +This is meant to describe the C++ frontend for gcc in detail. +Questions and comments to mrs@@cygnus.com. + +@menu +* Limitations of g++:: +* Routines:: +* Implementation Specifics:: +* Glossary:: +* Macros:: +* Typical Behavior:: +* Coding Conventions:: +* Templates:: +* Access Control:: +* Error Reporting:: +* Concept Index:: +@end menu + +@node Limitations of g++, Routines, Top, Top +@section Limitations of g++ + +@itemize @bullet +@item +Limitations on input source code: 240 nesting levels with the parser +stacksize (YYSTACKSIZE) set to 500 (the default), and requires around +16.4k swap space per nesting level. The parser needs about 2.09 * +number of nesting levels worth of stackspace. + +@cindex pushdecl_class_level +@item +I suspect there are other uses of pushdecl_class_level that do not call +set_identifier_type_value in tandem with the call to +pushdecl_class_level. It would seem to be an omission. + +@cindex delete, two argument +@item +For two argument delete, the second argument is always calculated by +``virtual_size ='' in the source. It currently has a problem, in that +object size is not calculated by the virtual destructor and passed back +for the second parameter to delete. Destructors need to return a value +just like constructors. ANSI C++ Jun 5 92 wp 12.5.6 + +The second argument is magically deleted in build_method_call, if it is +not used. It needs to be deleted for global operator delete also. + +@cindex access checking +@item +Access checking in general is unimplemented, there are a few cases +where it is implemented. grok_enum_decls should be used in more places +to do access checking, but this is only the tip of a bigger problem. + +@cindex @code{volatile} +@item +@code{volatile} is not implemented in general. + +@cindex pointers to members +@item +Pointers to members are only minimally supported, and there are places +where the grammar doesn't even properly accept them yet. + +@cindex multiple inheritance +@item +@code{this} will be wrong in virtual members functions defined in a +virtual base class, when they are overridden in a derived class, when +called via a non-left most object. + +An example would be: + +@example +extern "C" int printf(const char*, ...); +struct A { virtual void f() { } }; +struct B : virtual A { int b; B() : b(0) {} void f() { b++; } }; +struct C : B {}; +struct D : B {}; +struct E : C, D {}; +int main() +{ + E e; + C& c = e; D& d = e; + c.f(); d.f(); + printf ("C::b = %d, D::b = %d\n", e.C::b, e.D::b); + return 0; +} +@end example + +This will print out 2, 0, instead of 1,1. + +@end itemize + +@node Routines, Implementation Specifics, Limitations of g++, Top +@section Routines + +This section describes some of the routines used in the C++ front-end. + +@code{build_vtable} and @code{prepare_fresh_vtable} is used only within +the @file{cp-class.c} file, and only in @code{finish_struct} and +@code{modify_vtable_entries}. + +@code{build_vtable}, @code{prepare_fresh_vtable}, and +@code{finish_struct} are the only routines that set @code{DECL_VPARENT}. + +@code{finish_struct} can steal the virtual function table from parents, +this prohibits related_vslot from working. When finish_struct steals, +we know that + +@example +get_binfo (DECL_FIELD_CONTEXT (CLASSTYPE_VFIELD (t)), t, 0) +@end example + +@noindent +will get the related binfo. + +@code{layout_basetypes} does something with the VIRTUALS. + +Supposedly (according to Tiemann) most of the breadth first searching +done, like in @code{get_base_distance} and in @code{get_binfo} was not +because of any design decision. I have since found out the at least one +part of the compiler needs the notion of depth first binfo searching, I +am going to try and convert the whole thing, it should just work. The +term left-most refers to the depth first left-most node. It uses +@code{MAIN_VARIANT == type} as the condition to get left-most, because +the things that have @code{BINFO_OFFSET}s of zero are shared and will +have themselves as their own @code{MAIN_VARIANT}s. The non-shared right +ones, are copies of the left-most one, hence if it is its own +@code{MAIN_VARIENT}, we know it IS a left-most one, if it is not, it is +a non-left-most one. + +@code{get_base_distance}'s path and distance matters in its use in: + +@itemize @bullet +@item +@code{prepare_fresh_vtable} (the code is probably wrong) +@item +@code{init_vfields} Depends upon distance probably in a safe way, +build_offset_ref might use partial paths to do further lookups, +hack_identifier is probably not properly checking access. + +@item +@code{get_first_matching_virtual} probably should check for +@code{get_base_distance} returning -2. + +@item +@code{resolve_offset_ref} should be called in a more deterministic +manner. Right now, it is called in some random contexts, like for +arguments at @code{build_method_call} time, @code{default_conversion} +time, @code{convert_arguments} time, @code{build_unary_op} time, +@code{build_c_cast} time, @code{build_modify_expr} time, +@code{convert_for_assignment} time, and +@code{convert_for_initialization} time. + +But, there are still more contexts it needs to be called in, one was the +ever simple: + +@example +if (obj.*pmi != 7) + @dots{} +@end example + +Seems that the problems were due to the fact that @code{TREE_TYPE} of +the @code{OFFSET_REF} was not a @code{OFFSET_TYPE}, but rather the type +of the referent (like @code{INTEGER_TYPE}). This problem was fixed by +changing @code{default_conversion} to check @code{TREE_CODE (x)}, +instead of only checking @code{TREE_CODE (TREE_TYPE (x))} to see if it +was @code{OFFSET_TYPE}. + +@end itemize + +@node Implementation Specifics, Glossary, Routines, Top +@section Implementation Specifics + +@itemize @bullet +@item Explicit Initialization + +The global list @code{current_member_init_list} contains the list of +mem-initializers specified in a constructor declaration. For example: + +@example +foo::foo() : a(1), b(2) @{@} +@end example + +@noindent +will initialize @samp{a} with 1 and @samp{b} with 2. +@code{expand_member_init} places each initialization (a with 1) on the +global list. Then, when the fndecl is being processed, +@code{emit_base_init} runs down the list, initializing them. It used to +be the case that g++ first ran down @code{current_member_init_list}, +then ran down the list of members initializing the ones that weren't +explicitly initialized. Things were rewritten to perform the +initializations in order of declaration in the class. So, for the above +example, @samp{a} and @samp{b} will be initialized in the order that +they were declared: + +@example +class foo @{ public: int b; int a; foo (); @}; +@end example + +@noindent +Thus, @samp{b} will be initialized with 2 first, then @samp{a} will be +initialized with 1, regardless of how they're listed in the mem-initializer. + +@item Argument Matching + +In early 1993, the argument matching scheme in @sc{gnu} C++ changed +significantly. The original code was completely replaced with a new +method that will, hopefully, be easier to understand and make fixing +specific cases much easier. + +The @samp{-fansi-overloading} option is used to enable the new code; at +some point in the future, it will become the default behavior of the +compiler. + +The file @file{cp-call.c} contains all of the new work, in the functions +@code{rank_for_overload}, @code{compute_harshness}, +@code{compute_conversion_costs}, and @code{ideal_candidate}. + +Instead of using obscure numerical values, the quality of an argument +match is now represented by clear, individual codes. The new data +structure @code{struct harshness} (it used to be an @code{unsigned} +number) contains: + +@enumerate a +@item the @samp{code} field, to signify what was involved in matching two +arguments; +@item the @samp{distance} field, used in situations where inheritance +decides which function should be called (one is ``closer'' than +another); +@item and the @samp{int_penalty} field, used by some codes as a tie-breaker. +@end enumerate + +The @samp{code} field is a number with a given bit set for each type of +code, OR'd together. The new codes are: + +@itemize @bullet +@item @code{EVIL_CODE} +The argument was not a permissible match. + +@item @code{CONST_CODE} +Currently, this is only used by @code{compute_conversion_costs}, to +distinguish when a non-@code{const} member function is called from a +@code{const} member function. + +@item @code{ELLIPSIS_CODE} +A match against an ellipsis @samp{...} is considered worse than all others. + +@item @code{USER_CODE} +Used for a match involving a user-defined conversion. + +@item @code{STD_CODE} +A match involving a standard conversion. + +@item @code{PROMO_CODE} +A match involving an integral promotion. For these, the +@code{int_penalty} field is used to handle the ARM's rule (XXX cite) +that a smaller @code{unsigned} type should promote to a @code{int}, not +to an @code{unsigned int}. + +@item @code{QUAL_CODE} +Used to mark use of qualifiers like @code{const} and @code{volatile}. + +@item @code{TRIVIAL_CODE} +Used for trivial conversions. The @samp{int_penalty} field is used by +@code{convert_harshness} to communicate further penalty information back +to @code{build_overload_call_real} when deciding which function should +be call. +@end itemize + +The functions @code{convert_to_aggr} and @code{build_method_call} use +@code{compute_conversion_costs} to rate each argument's suitability for +a given candidate function (that's how we get the list of candidates for +@code{ideal_candidate}). + +@end itemize + +@node Glossary, Macros, Implementation Specifics, Top +@section Glossary + +@table @r +@item binfo +The main data structure in the compiler used to represent the +inheritance relationships between classes. The data in the binfo can be +accessed by the BINFO_ accessor macros. + +@item vtable +@itemx virtual function table + +The virtual function table holds information used in virtual function +dispatching. In the compiler, they are usually referred to as vtables, +or vtbls. The first index is not used in the normal way, I believe it +is probably used for the virtual destructor. + +@item vfield + +vfields can be thought of as the base information needed to build +vtables. For every vtable that exists for a class, there is a vfield. +See also vtable and virtual function table pointer. When a type is used +as a base class to another type, the virtual function table for the +derived class can be based upon the vtable for the base class, just +extended to include the additional virtual methods declared in the +derived class. The virtual function table from a virtual base class is +never reused in a derived class. @code{is_normal} depends upon this. + +@item virtual function table pointer + +These are @code{FIELD_DECL}s that are pointer types that point to +vtables. See also vtable and vfield. +@end table + +@node Macros, Typical Behavior, Glossary, Top +@section Macros + +This section describes some of the macros used on trees. The list +should be alphabetical. Eventually all macros should be documented +here. There are some postscript drawings that can be used to better +understnad from of the more complex data structures, contact Mike Stump +(@code{mrs@@cygnus.com}) for information about them. + +@table @code +@item BINFO_BASETYPES +A vector of additional binfos for the types inherited by this basetype. +The binfos are fully unshared (except for virtual bases, in which +case the binfo structure is shared). + + If this basetype describes type D as inherited in C, + and if the basetypes of D are E anf F, + then this vector contains binfos for inheritance of E and F by C. + +Has values of: + + TREE_VECs + + +@item BINFO_INHERITANCE_CHAIN +Temporarily used to represent specific inheritances. It usually points +to the binfo associated with the lesser derived type, but it can be +reversed by reverse_path. For example: + +@example + Z ZbY least derived + | + Y YbX + | + X Xb most derived + +TYPE_BINFO (X) == Xb +BINFO_INHERITANCE_CHAIN (Xb) == YbX +BINFO_INHERITANCE_CHAIN (Yb) == ZbY +BINFO_INHERITANCE_CHAIN (Zb) == 0 +@end example + +Not sure is the above is really true, get_base_distance has is point +towards the most derived type, opposite from above. + +Set by build_vbase_path, recursive_bounded_basetype_p, +get_base_distance, lookup_field, lookup_fnfields, and reverse_path. + +What things can this be used on: + + TREE_VECs that are binfos + + +@item BINFO_OFFSET +The offset where this basetype appears in its containing type. +BINFO_OFFSET slot holds the offset (in bytes) from the base of the +complete object to the base of the part of the object that is allocated +on behalf of this `type'. This is always 0 except when there is +multiple inheritance. + +Used on TREE_VEC_ELTs of the binfos BINFO_BASETYPES (...) for example. + + +@item BINFO_VIRTUALS +A unique list of functions for the virtual function table. See also +TYPE_BINFO_VIRTUALS. + +What things can this be used on: + + TREE_VECs that are binfos + + +@item BINFO_VTABLE +Used to find the VAR_DECL that is the virtual function table associated +with this binfo. See also TYPE_BINFO_VTABLE. To get the virtual +function table pointer, see CLASSTYPE_VFIELD. + +What things can this be used on: + + TREE_VECs that are binfos + +Has values of: + + VAR_DECLs that are virtual function tables + + +@item BLOCK_SUPERCONTEXT +In the outermost scope of each function, it points to the FUNCTION_DECL +node. It aids in better DWARF support of inline functions. + + +@item CLASSTYPE_TAGS +CLASSTYPE_TAGS is a linked (via TREE_CHAIN) list of member classes of a +class. TREE_PURPOSE is the name, TREE_VALUE is the type (pushclass scans +these and calls pushtag on them.) + +finish_struct scans these to produce TYPE_DECLs to add to the +TYPE_FIELDS of the type. + +It is expected that name found in the TREE_PURPOSE slot is unique, +resolve_scope_to_name is one such place that depends upon this +uniqueness. + + +@item CLASSTYPE_METHOD_VEC +The following is true after finish_struct has been called (on the +class?) but not before. Before finish_struct is called, things are +different to some extent. Contains a TREE_VEC of methods of the class. +The TREE_VEC_LENGTH is the number of differently named methods plus one +for the 0th entry. The 0th entry is always allocated, and reserved for +ctors and dtors. If there are none, TREE_VEC_ELT(N,0) == NULL_TREE. +Each entry of the TREE_VEC is a FUNCTION_DECL. For each FUNCTION_DECL, +there is a DECL_CHAIN slot. If the FUNCTION_DECL is the last one with a +given name, the DECL_CHAIN slot is NULL_TREE. Otherwise it is the next +method that has the same name (but a different signature). It would +seem that it is not true that because the DECL_CHAIN slot is used in +this way, we cannot call pushdecl to put the method in the global scope +(cause that would overwrite the TREE_CHAIN slot), because they use +different _CHAINs. finish_struct_methods setups up one version of the +TREE_CHAIN slots on the FUNCTION_DECLs. + +friends are kept in TREE_LISTs, so that there's no need to use their +TREE_CHAIN slot for anything. + +Has values of: + + TREE_VECs + + +@item CLASSTYPE_VFIELD +Seems to be in the process of being renamed TYPE_VFIELD. Use on types +to get the main virtual function table pointer. To get the virtual +function table use BINFO_VTABLE (TYPE_BINFO ()). + +Has values of: + + FIELD_DECLs that are virtual function table pointers + +What things can this be used on: + + RECORD_TYPEs + + +@item DECL_CLASS_CONTEXT +Identifies the context that the _DECL was found in. For virtual function +tables, it points to the type associated with the virtual function +table. See also DECL_CONTEXT, DECL_FIELD_CONTEXT and DECL_FCONTEXT. + +The difference between this and DECL_CONTEXT, is that for virtuals +functions like: + +@example +struct A +@{ + virtual int f (); +@}; + +struct B : A +@{ + int f (); +@}; + +DECL_CONTEXT (A::f) == A +DECL_CLASS_CONTEXT (A::f) == A + +DECL_CONTEXT (B::f) == A +DECL_CLASS_CONTEXT (B::f) == B +@end example + +Has values of: + + RECORD_TYPEs, or UNION_TYPEs + +What things can this be used on: + + TYPE_DECLs, _DECLs + + +@item DECL_CONTEXT +Identifies the context that the _DECL was found in. Can be used on +virtual function tables to find the type associated with the virtual +function table, but since they are FIELD_DECLs, DECL_FIELD_CONTEXT is a +better access method. Internally the same as DECL_FIELD_CONTEXT, so +don't us both. See also DECL_FIELD_CONTEXT, DECL_FCONTEXT and +DECL_CLASS_CONTEXT. + +Has values of: + + RECORD_TYPEs + + +What things can this be used on: + +@display +VAR_DECLs that are virtual function tables +_DECLs +@end display + + +@item DECL_FIELD_CONTEXT +Identifies the context that the FIELD_DECL was found in. Internally the +same as DECL_CONTEXT, so don't us both. See also DECL_CONTEXT, +DECL_FCONTEXT and DECL_CLASS_CONTEXT. + +Has values of: + + RECORD_TYPEs + +What things can this be used on: + +@display +FIELD_DECLs that are virtual function pointers +FIELD_DECLs +@end display + + +@item DECL_NESTED_TYPENAME +Holds the fully qualified type name. Example, Base::Derived. + +Has values of: + + IDENTIFIER_NODEs + +What things can this be used on: + + TYPE_DECLs + + +@item DECL_NAME + +Has values of: + +@display +0 for things that don't have names +IDENTIFIER_NODEs for TYPE_DECLs +@end display + +@item DECL_IGNORED_P +A bit that can be set to inform the debug information output routines in +the backend that a certain _DECL node should be totally ignored. + +Used in cases where it is known that the debugging information will be +output in another file, or where a sub-type is known not to be needed +because the enclosing type is not needed. + +A compiler constructed virtual destructor in derived classes that do not +define an exlicit destructor that was defined exlicit in a base class +has this bit set as well. Also used on __FUNCTION__ and +__PRETTY_FUNCTION__ to mark they are ``compiler generated.'' c-decl and +c-lex.c both want DECL_IGNORED_P set for ``internally generated vars,'' +and ``user-invisible variable.'' + +Functions built by the C++ front-end such as default destructors, +virtual desctructors and default constructors want to be marked that +they are compiler generated, but unsure why. + +Currently, it is used in an absolute way in the C++ front-end, as an +optimization, to tell the debug information output routines to not +generate debugging information that will be output by another separately +compiled file. + + +@item DECL_VIRTUAL_P +A flag used on FIELD_DECLs and VAR_DECLs. (Documentation in tree.h is +wrong.) Used in VAR_DECLs to indicate that the variable is a vtable. +It is also used in FIELD_DECLs for vtable pointers. + +What things can this be used on: + + FIELD_DECLs and VAR_DECLs + + +@item DECL_VPARENT +Used to point to the parent type of the vtable if there is one, else it +is just the type associated with the vtable. Because of the sharing of +virtual function tables that goes on, this slot is not very useful, and +is in fact, not used in the compiler at all. It can be removed. + +What things can this be used on: + + VAR_DECLs that are virtual function tables + +Has values of: + + RECORD_TYPEs maybe UNION_TYPEs + + +@item DECL_FCONTEXT +Used to find the first baseclass in which this FIELD_DECL is defined. +See also DECL_CONTEXT, DECL_FIELD_CONTEXT and DECL_CLASS_CONTEXT. + +How it is used: + + Used when writing out debugging information about vfield and + vbase decls. + +What things can this be used on: + + FIELD_DECLs that are virtual function pointers + FIELD_DECLs + + +@item DECL_REFERENCE_SLOT +Used to hold the initialize for the reference. + +What things can this be used on: + + PARM_DECLs and VAR_DECLs that have a reference type + + +@item DECL_VINDEX +Used for FUNCTION_DECLs in two different ways. Before the structure +containing the FUNCTION_DECL is laid out, DECL_VINDEX may point to a +FUNCTION_DECL in a base class which is the FUNCTION_DECL which this +FUNCTION_DECL will replace as a virtual function. When the class is +laid out, this pointer is changed to an INTEGER_CST node which is +suitable to find an index into the virtual function table. See +get_vtable_entry as to how one can find the right index into the virtual +function table. The first index 0, of a virtual function table it not +used in the normal way, so the first real index is 1. + +DECL_VINDEX may be a TREE_LIST, that would seem to be a list of +overridden FUNCTION_DECLs. add_virtual_function has code to deal with +this when it uses the variable base_fndecl_list, but it would seem that +somehow, it is possible for the TREE_LIST to pursist until method_call, +and it should not. + + +What things can this be used on: + + FUNCTION_DECLs + + +@item DECL_SOURCE_FILE +Identifies what source file a particular declaration was found in. + +Has values of: + + "<built-in>" on TYPE_DECLs to mean the typedef is built in + + +@item DECL_SOURCE_LINE +Identifies what source line number in the source file the declaration +was found at. + +Has values of: + +@display +0 for an undefined label + +0 for TYPE_DECLs that are internally generated + +0 for FUNCTION_DECLs for functions generated by the compiler + (not yet, but should be) + +0 for ``magic'' arguments to functions, that the user has no + control over +@end display + + +@item TREE_USED + +Has values of: + + 0 for unused labels + + +@item TREE_ADDRESSABLE +A flag that is set for any type that has a constructor. + + +@item TREE_COMPLEXITY +They seem a kludge way to track recursion, poping, and pushing. They only +appear in cp-decl.c and cp-decl2.c, so the are a good candidate for +proper fixing, and removal. + + +@item TREE_PRIVATE +Set for FIELD_DECLs by finish_struct. But not uniformly set. + +The following routines do something with PRIVATE access: +build_method_call, alter_access, finish_struct_methods, +finish_struct, convert_to_aggr, CWriteLanguageDecl, CWriteLanguageType, +CWriteUseObject, compute_access, lookup_field, dfs_pushdecl, +GNU_xref_member, dbxout_type_fields, dbxout_type_method_1 + + +@item TREE_PROTECTED +The following routines do something with PROTECTED access: +build_method_call, alter_access, finish_struct, convert_to_aggr, +CWriteLanguageDecl, CWriteLanguageType, CWriteUseObject, +compute_access, lookup_field, GNU_xref_member, dbxout_type_fields, +dbxout_type_method_1 + + +@item TYPE_BINFO +Used to get the binfo for the type. + +Has values of: + + TREE_VECs that are binfos + +What things can this be used on: + + RECORD_TYPEs + + +@item TYPE_BINFO_BASETYPES +See also BINFO_BASETYPES. + +@item TYPE_BINFO_VIRTUALS +A unique list of functions for the virtual function table. See also +BINFO_VIRTUALS. + +What things can this be used on: + + RECORD_TYPEs + + +@item TYPE_BINFO_VTABLE +Points to the virtual function table associated with the given type. +See also BINFO_VTABLE. + +What things can this be used on: + + RECORD_TYPEs + +Has values of: + + VAR_DECLs that are virtual function tables + + +@item TYPE_NAME +Names the type. + +Has values of: + +@display +0 for things that don't have names. +should be IDENTIFIER_NODE for RECORD_TYPEs UNION_TYPEs and + ENUM_TYPEs. +TYPE_DECL for RECORD_TYPEs, UNION_TYPEs and ENUM_TYPEs, but + shouldn't be. +TYPE_DECL for typedefs, unsure why. +@end display + +What things can one use this on: + +@display +TYPE_DECLs +RECORD_TYPEs +UNION_TYPEs +ENUM_TYPEs +@end display + +History: + + It currently points to the TYPE_DECL for RECORD_TYPEs, + UNION_TYPEs and ENUM_TYPEs, but it should be history soon. + + +@item TYPE_METHODS +Synonym for @code{CLASSTYPE_METHOD_VEC}. Chained together with +@code{TREE_CHAIN}. @file{dbxout.c} uses this to get at the methods of a +class. + + +@item TYPE_DECL +Used to represent typedefs, and used to represent bindings layers. + +Components: + + DECL_NAME is the name of the typedef. For example, foo would + be found in the DECL_NAME slot when @code{typedef int foo;} is + seen. + + DECL_SOURCE_LINE identifies what source line number in the + source file the declaration was found at. A value of 0 + indicates that this TYPE_DECL is just an internal binding layer + marker, and does not correspond to a user suppiled typedef. + + DECL_SOURCE_FILE + +@item TYPE_FIELDS +A linked list (via @code{TREE_CHAIN}) of member types of a class. The +list can contain @code{TYPE_DECL}s, but there can also be other things +in the list apparently. See also @code{CLASSTYPE_TAGS}. + + +@item TYPE_VIRTUAL_P +A flag used on a @code{FIELD_DECL} or a @code{VAR_DECL}, indicates it is +a virtual function table or a pointer to one. When used on a +@code{FUNCTION_DECL}, indicates that it is a virtual function. When +used on an @code{IDENTIFIER_NODE}, indicates that a function with this +same name exists and has been declared virtual. + +When used on types, it indicates that the type has virtual functions, or +is derived from one that does. + +Not sure if the above about virtual function tables is still true. See +also info on @code{DECL_VIRTUAL_P}. + +What things can this be used on: + + FIELD_DECLs, VAR_DECLs, FUNCTION_DECLs, IDENTIFIER_NODEs + + +@item VF_BASETYPE_VALUE +Get the associated type from the binfo that caused the given vfield to +exist. This is the least derived class (the most parent class) that +needed a virtual function table. It is probably the case that all uses +of this field are misguided, but they need to be examined on a +case-by-case basis. See history for more information on why the +previous statement was made. + +Set at @code{finish_base_struct} time. + +What things can this be used on: + + TREE_LISTs that are vfields + +History: + + This field was used to determine if a virtual function table's + slot should be filled in with a certain virtual function, by + checking to see if the type returned by VF_BASETYPE_VALUE was a + parent of the context in which the old virtual function existed. + This incorrectly assumes that a given type _could_ not appear as + a parent twice in a given inheritance lattice. For single + inheritance, this would in fact work, because a type could not + possibly appear more than once in an inheritance lattice, but + with multiple inheritance, a type can appear more than once. + + +@item VF_BINFO_VALUE +Identifies the binfo that caused this vfield to exist. If this vfield +is from the first direct base class that has a virtual function table, +then VF_BINFO_VALUE is NULL_TREE, otherwise it will be the binfo of the +direct base where the vfield came from. Can use @code{TREE_VIA_VIRTUAL} +on result to find out if it is a virtual base class. Related to the +binfo found by + +@example +get_binfo (VF_BASETYPE_VALUE (vfield), t, 0) +@end example + +@noindent +where @samp{t} is the type that has the given vfield. + +@example +get_binfo (VF_BASETYPE_VALUE (vfield), t, 0) +@end example + +@noindent +will return the binfo for the the given vfield. + +May or may not be set at @code{modify_vtable_entries} time. Set at +@code{finish_base_struct} time. + +What things can this be used on: + + TREE_LISTs that are vfields + + +@item VF_DERIVED_VALUE +Identifies the type of the most derived class of the vfield, excluding +the the class this vfield is for. + +Set at @code{finish_base_struct} time. + +What things can this be used on: + + TREE_LISTs that are vfields + + +@item VF_NORMAL_VALUE +Identifies the type of the most derived class of the vfield, including +the class this vfield is for. + +Set at @code{finish_base_struct} time. + +What things can this be used on: + + TREE_LISTs that are vfields + + +@item WRITABLE_VTABLES +This is a option that can be defined when building the compiler, that +will cause the compiler to output vtables into the data segment so that +the vtables maybe written. This is undefined by default, because +normally the vtables should be unwritable. People that implement object +I/O facilities may, or people that want to change the dynamic type of +objects may want to have the vtables writable. Another way of achieving +this would be to make a copy of the vtable into writable memory, but the +drawback there is that that method only changes the type for one object. + +@end table + +@node Typical Behavior, Coding Conventions, Macros, Top +@section Typical Behavior + +@cindex parse errors + +Whenever seemingly normal code fails with errors like +@code{syntax error at `\@{'}, it's highly likely that grokdeclarator is +returning a NULL_TREE for whatever reason. + +@node Coding Conventions, Templates, Typical Behavior, Top +@section Coding Conventions + +It should never be that case that trees are modified in-place by the +back-end, @emph{unless} it is guaranteed that the semantics are the same +no matter how shared the tree structure is. @file{fold-const.c} still +has some cases where this is not true, but rms hypothesizes that this +will never be a problem. + +@node Templates, Access Control, Coding Conventions, Top +@section Templates + +g++ uses the simple approach to instantiating templates: it blindly +generates the code for each instantiation as needed. For class +templates, g++ pushes the template parameters into the namespace for the +duration of the instantiation; for function templates, it's a simple +search and replace. + +This approach does not support any of the template definition-time error +checking that is being bandied about by X3J16. It makes no attempt to deal +with name binding in a consistent way. + +Instantiation of a class template is triggered by the use of a template +class anywhere but in a straight declaration like @code{class A<int>}. +This is wrong; in fact, it should not be triggered by typedefs or +declarations of pointers. Now that explicit instantiation is supported, +this misfeature is not necessary. + +Important functions: + +@table @code +@item instantiate_class_template +This function +@end table + +@node Access Control, Error Reporting, Templates, Top +@section Access Control +The function compute_access returns one of three values: + +@table @code +@item access_public +means that the field can be accessed by the current lexical scope. + +@item access_protected +means that the field cannot be accessed by the current lexical scope +because it is protected. + +@item access_private +means that the field cannot be accessed by the current lexical scope +because it is private. +@end table + +DECL_ACCESS is used for access declarations; alter_access creates a list +of types and accesses for a given decl. + +Formerly, DECL_@{PUBLIC,PROTECTED,PRIVATE@} corresponded to the return +codes of compute_access and were used as a cache for compute_access. +Now they are not used at all. + +TREE_PROTECTED and TREE_PRIVATE are used to record the access levels +granted by the containing class. BEWARE: TREE_PUBLIC means something +completely unrelated to access control! + +@node Error Reporting, Concept Index, Access Control, Top +@section Error Reporting + +The C++ frontend uses a call-back mechanism to allow functions to print +out reasonable strings for types and functions without putting extra +logic in the functions where errors are found. The interface is through +the @code{cp_error} function (or @code{cp_warning}, etc.). The +syntax is exactly like that of @code{error}, except that a few more +conversions are supported: + +@itemize @bullet +@item +%C indicates a value of `enum tree_code'. +@item +%D indicates a *_DECL node. +@item +%E indicates a *_EXPR node. +@item +%L indicates a value of `enum languages'. +@item +%P indicates the name of a parameter (i.e. "this", "1", "2", ...) +@item +%T indicates a *_TYPE node. +@item +%O indicates the name of an operator (MODIFY_EXPR -> "operator ="). + +@end itemize + +There is some overlap between these; for instance, any of the node +options can be used for printing an identifier (though only @code{%D} +tries to decipher function names). + +For a more verbose message (@code{class foo} as opposed to just @code{foo}, +including the return type for functions), use @code{%#c}. +To have the line number on the error message indicate the line of the +DECL, use @code{cp_error_at} and its ilk; to indicate which argument you want, +use @code{%+D}, or it will default to the first. + +@node Concept Index, , Error Reporting, Top +@section Concept Index + +@printindex cp + +@bye diff --git a/gcc/cp/hash.h b/gcc/cp/hash.h new file mode 100644 index 0000000..fceaa63 --- /dev/null +++ b/gcc/cp/hash.h @@ -0,0 +1,207 @@ +/* C code produced by gperf version 2.5 (GNU C++ version) */ +/* Command-line: gperf -p -j1 -g -o -t -N is_reserved_word -k1,4,7,$ ../../../devo/gcc/cp/gxx.gperf */ +/* Command-line: gperf -p -j1 -g -o -t -N is_reserved_word -k1,4,$,7 gplus.gperf */ +struct resword { char *name; short token; enum rid rid;}; + +#define TOTAL_KEYWORDS 86 +#define MIN_WORD_LENGTH 2 +#define MAX_WORD_LENGTH 13 +#define MIN_HASH_VALUE 4 +#define MAX_HASH_VALUE 196 +/* maximum key range = 193, duplicates = 0 */ + +#ifdef __GNUC__ +inline +#endif +static unsigned int +hash (str, len) + register char *str; + register int unsigned len; +{ + static unsigned char asso_values[] = + { + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 197, 197, 197, 197, 197, + 197, 197, 197, 197, 197, 0, 197, 93, 3, 35, + 3, 0, 71, 8, 4, 78, 197, 3, 30, 6, + 29, 18, 37, 197, 55, 0, 4, 11, 7, 20, + 0, 8, 197, 197, 197, 197, 197, 197, + }; + register int hval = len; + + switch (hval) + { + default: + case 7: + hval += asso_values[str[6]]; + case 6: + case 5: + case 4: + hval += asso_values[str[3]]; + case 3: + case 2: + case 1: + hval += asso_values[str[0]]; + } + return hval + asso_values[str[len - 1]]; +} + +#ifdef __GNUC__ +inline +#endif +struct resword * +is_reserved_word (str, len) + register char *str; + register unsigned int len; +{ + static struct resword wordlist[] = + { + {"",}, {"",}, {"",}, {"",}, + {"else", ELSE, NORID,}, + {"",}, {"",}, + {"__asm__", GCC_ASM_KEYWORD, NORID}, + {"this", THIS, NORID,}, + {"delete", DELETE, NORID,}, + {"except", EXCEPT, NORID /* Extension */,}, + {"__asm", GCC_ASM_KEYWORD, NORID}, + {"double", TYPESPEC, RID_DOUBLE,}, + {"typeid", TYPEID, NORID,}, + {"switch", SWITCH, NORID,}, + {"try", TRY, NORID /* Extension */,}, + {"enum", ENUM, NORID,}, + {"void", TYPESPEC, RID_VOID,}, + {"",}, {"",}, {"",}, + {"struct", AGGR, RID_RECORD,}, + {"",}, + {"do", DO, NORID,}, + {"",}, {"",}, {"",}, {"",}, + {"__headof__", HEADOF, NORID}, + {"",}, {"",}, + {"__const__", TYPE_QUAL, RID_CONST}, + {"__volatile", TYPE_QUAL, RID_VOLATILE}, + {"__const", TYPE_QUAL, RID_CONST}, + {"__volatile__", TYPE_QUAL, RID_VOLATILE}, + {"extern", SCSPEC, RID_EXTERN,}, + {"__typeof__", TYPEOF, NORID}, + {"",}, + {"signed", TYPESPEC, RID_SIGNED,}, + {"case", CASE, NORID,}, + {"class", AGGR, RID_CLASS,}, + {"__classof__", CLASSOF, NORID}, + {"__extension__", EXTENSION, NORID}, + {"",}, + {"const", TYPE_QUAL, RID_CONST,}, + {"static", SCSPEC, RID_STATIC,}, + {"",}, + {"throw", THROW, NORID /* Extension */,}, + {"goto", GOTO, NORID,}, + {"signature", AGGR, RID_SIGNATURE /* Extension */,}, + {"long", TYPESPEC, RID_LONG,}, + {"private", VISSPEC, RID_PRIVATE,}, + {"new", NEW, NORID,}, + {"template", TEMPLATE, NORID,}, + {"",}, + {"while", WHILE, NORID,}, + {"",}, + {"protected", VISSPEC, RID_PROTECTED,}, + {"continue", CONTINUE, NORID,}, + {"",}, + {"raise", RAISE, NORID /* Extension */,}, + {"raises", RAISES, NORID /* Extension */,}, + {"",}, + {"union", AGGR, RID_UNION,}, + {"short", TYPESPEC, RID_SHORT,}, + {"",}, + {"__inline", SCSPEC, RID_INLINE}, + {"",}, + {"__inline__", SCSPEC, RID_INLINE}, + {"",}, + {"__alignof__", ALIGNOF, NORID}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"sizeof", SIZEOF, NORID,}, + {"virtual", SCSPEC, RID_VIRTUAL,}, + {"catch", CATCH, NORID,}, + {"friend", SCSPEC, RID_FRIEND,}, + {"typeof", TYPEOF, NORID,}, + {"",}, {"",}, + {"headof", HEADOF, NORID,}, + {"int", TYPESPEC, RID_INT,}, + {"",}, {"",}, + {"__signed__", TYPESPEC, RID_SIGNED}, + {"__signed", TYPESPEC, RID_SIGNED}, + {"",}, {"",}, {"",}, + {"__attribute", ATTRIBUTE, NORID}, + {"sigof", SIGOF, NORID /* Extension */,}, + {"__attribute__", ATTRIBUTE, NORID}, + {"",}, + {"__headof", HEADOF, NORID}, + {"",}, {"",}, + {"unsigned", TYPESPEC, RID_UNSIGNED,}, + {"return", RETURN, NORID,}, + {"asm", ASM_KEYWORD, NORID,}, + {"__wchar_t", TYPESPEC, RID_WCHAR /* Unique to ANSI C++ */,}, + {"break", BREAK, NORID,}, + {"__typeof", TYPEOF, NORID}, + {"mutable", SCSPEC, RID_MUTABLE,}, + {"",}, + {"public", VISSPEC, RID_PUBLIC,}, + {"",}, + {"__classof", CLASSOF, NORID}, + {"default", DEFAULT, NORID,}, + {"",}, {"",}, {"",}, {"",}, + {"exception", AGGR, RID_EXCEPTION /* Extension */,}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"all", ALL, NORID /* Extension */,}, + {"",}, {"",}, + {"for", FOR, NORID,}, + {"",}, {"",}, + {"__label__", LABEL, NORID}, + {"auto", SCSPEC, RID_AUTO,}, + {"",}, {"",}, {"",}, {"",}, + {"volatile", TYPE_QUAL, RID_VOLATILE,}, + {"__alignof", ALIGNOF, NORID}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"dynamic_cast", DYNAMIC_CAST, NORID,}, + {"",}, + {"char", TYPESPEC, RID_CHAR,}, + {"",}, + {"if", IF, NORID,}, + {"",}, + {"typedef", SCSPEC, RID_TYPEDEF,}, + {"operator", OPERATOR, NORID,}, + {"reraise", RERAISE, NORID /* Extension */,}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"inline", SCSPEC, RID_INLINE,}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"",}, + {"float", TYPESPEC, RID_FLOAT,}, + {"",}, {"",}, {"",}, + {"overload", OVERLOAD, NORID,}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"classof", CLASSOF, NORID,}, + {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, + {"",}, {"",}, + {"register", SCSPEC, RID_REGISTER,}, + }; + + if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH) + { + register int key = hash (str, len); + + if (key <= MAX_HASH_VALUE && key >= 0) + { + register char *s = wordlist[key].name; + + if (*s == *str && !strcmp (str + 1, s + 1)) + return &wordlist[key]; + } + } + return 0; +} diff --git a/gcc/cp/init.c b/gcc/cp/init.c new file mode 100644 index 0000000..12e0a64 --- /dev/null +++ b/gcc/cp/init.c @@ -0,0 +1,4181 @@ +/* Handle initialization things in C++. + Copyright (C) 1987, 1989, 1992, 1993, 1994 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* High-level class interface. */ + +#include "config.h" +#include "tree.h" +#include "rtl.h" +#include "cp-tree.h" +#include "flags.h" + +#undef NULL +#define NULL 0 + +/* In C++, structures with well-defined constructors are initialized by + those constructors, unasked. CURRENT_BASE_INIT_LIST + holds a list of stmts for a BASE_INIT term in the grammar. + This list has one element for each base class which must be + initialized. The list elements are [basename, init], with + type basetype. This allows the possibly anachronistic form + (assuming d : a, b, c) "d (int a) : c(a+5), b (a-4), a (a+3)" + where each successive term can be handed down the constructor + line. Perhaps this was not intended. */ +tree current_base_init_list, current_member_init_list; + +void emit_base_init (); +void check_base_init (); +static void expand_aggr_vbase_init (); +void expand_member_init (); +void expand_aggr_init (); + +static void expand_aggr_init_1 (); +static void expand_recursive_init_1 (); +static void expand_recursive_init (); +tree expand_vec_init (); +tree build_vec_delete (); + +static void add_friend (), add_friends (); + +/* Cache _builtin_new and _builtin_delete exprs. */ +static tree BIN, BID; + +/* Cache the identifier nodes for the two magic field of a new cookie. */ +static tree nc_nelts_field_id; +static tree nc_ptr_2comp_field_id; + +static tree minus_one; + +/* Set up local variable for this file. MUST BE CALLED AFTER + INIT_DECL_PROCESSING. */ + +tree BI_header_type, BI_header_size; + +void init_init_processing () +{ + tree fields[1]; + + /* Define implicit `operator new' and `operator delete' functions. */ + BIN = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) NEW_EXPR]))); + TREE_USED (TREE_OPERAND (BIN, 0)) = 0; + BID = default_conversion (get_first_fn (IDENTIFIER_GLOBAL_VALUE (ansi_opname[(int) DELETE_EXPR]))); + TREE_USED (TREE_OPERAND (BID, 0)) = 0; + minus_one = build_int_2 (-1, -1); + + /* Define the structure that holds header information for + arrays allocated via operator new. */ + BI_header_type = make_lang_type (RECORD_TYPE); + nc_nelts_field_id = get_identifier ("nelts"); + fields[0] = build_lang_field_decl (FIELD_DECL, nc_nelts_field_id, sizetype); + finish_builtin_type (BI_header_type, "__new_cookie", fields, + 0, double_type_node); + BI_header_size = size_in_bytes (BI_header_type); +} + +/* Subroutine of emit_base_init. For BINFO, initialize all the + virtual function table pointers, except those that come from + virtual base classes. Initialize binfo's vtable pointer, if + INIT_SELF is true. CAN_ELIDE is true when we know that all virtual + function table pointers in all bases have been initialized already, + probably because their constructors have just be run. */ +void +init_vtbl_ptrs (binfo, init_self, can_elide) + tree binfo; + int init_self, can_elide; +{ + tree vfields; + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + int is_not_base_vtable = + i != CLASSTYPE_VFIELD_PARENT (BINFO_TYPE (binfo)); + if (! TREE_VIA_VIRTUAL (base_binfo)) + init_vtbl_ptrs (base_binfo, is_not_base_vtable, can_elide); + } +#if 0 + /* Before turning this on, make sure it is correct. */ + if (can_elide && ! BINFO_MODIFIED (binfo)) + return; +#endif + /* Should we use something besides CLASSTYPE_VFIELDS? */ + if (init_self && CLASSTYPE_VFIELDS (BINFO_TYPE (binfo))) + { + tree base_ptr = convert_pointer_to_real (binfo, current_class_decl); + expand_expr_stmt (build_virtual_init (binfo, binfo, base_ptr)); + } +} + +/* 348 - 351 */ +/* Subroutine of emit_base_init. */ +static void +perform_member_init (member, name, init, explicit) + tree member, name, init; + int explicit; +{ + tree decl; + tree type = TREE_TYPE (member); + + if (TYPE_NEEDS_CONSTRUCTING (type) + || (init && TYPE_HAS_CONSTRUCTOR (type))) + { + /* Since `init' is already a TREE_LIST on the current_member_init_list, + only build it into one if we aren't already a list. */ + if (init != NULL_TREE && TREE_CODE (init) != TREE_LIST) + init = build_tree_list (NULL_TREE, init); + + decl = build_component_ref (C_C_D, name, 0, explicit); + + if (explicit + && TREE_CODE (type) == ARRAY_TYPE + && init != NULL_TREE + && TREE_CHAIN (init) == NULL_TREE + && TREE_CODE (TREE_TYPE (TREE_VALUE (init))) == ARRAY_TYPE) + { + /* Initialization of one array from another. */ + expand_vec_init (TREE_OPERAND (decl, 1), decl, + array_type_nelts (type), TREE_VALUE (init), 1); + } + else + expand_aggr_init (decl, init, 0); + } + else + { + if (init == NULL_TREE) + { + if (explicit) + { + cp_error ("incomplete initializer for member `%D' of class `%T' which has no constructor", + member, current_class_type); + init = error_mark_node; + } + /* member traversal: note it leaves init NULL */ + else if (TREE_CODE (TREE_TYPE (member)) == REFERENCE_TYPE) + cp_pedwarn ("uninitialized reference member `%D'", member); + } + else if (TREE_CODE (init) == TREE_LIST) + { + /* There was an explicit member initialization. Do some + work in that case. */ + if (TREE_CHAIN (init)) + { + warning ("initializer list treated as compound expression"); + init = build_compound_expr (init); + } + else + init = TREE_VALUE (init); + } + + /* We only build this with a null init if we got it from the + current_member_init_list. */ + if (init || explicit) + { + decl = build_component_ref (C_C_D, name, 0, explicit); + expand_expr_stmt (build_modify_expr (decl, INIT_EXPR, init)); + } + } + + if (flag_handle_exceptions == 2 && TYPE_NEEDS_DESTRUCTOR (type)) + { + cplus_expand_start_try (1); + push_exception_cleanup (build_unary_op (ADDR_EXPR, decl, 0)); + } +} + +/* Subroutine of emit_member_init. */ +static tree +sort_member_init (t) + tree t; +{ + tree x, member, name, field, init; + tree init_list = NULL_TREE; + tree fields_to_unmark = NULL_TREE; + int found; + + for (member = TYPE_FIELDS (t); member ; member = TREE_CHAIN (member)) + { + found = 0; + for (x = current_member_init_list ; x ; x = TREE_CHAIN (x)) + { + /* If we cleared this out, then pay no attention to it. */ + if (TREE_PURPOSE (x) == NULL_TREE) + continue; + name = TREE_PURPOSE (x); + +#if 0 + field = (TREE_CODE (name) == COMPONENT_REF + ? TREE_OPERAND (name, 1) : IDENTIFIER_CLASS_VALUE (name)); +#else + /* Let's find out when this happens. */ + my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 348); + field = IDENTIFIER_CLASS_VALUE (name); +#endif + + /* If one member shadows another, get the outermost one. */ + if (TREE_CODE (field) == TREE_LIST) + field = TREE_VALUE (field); + + if (field == member) + { + /* See if we already found an initializer for this field. */ + if (found) + { + if (DECL_NAME (field)) + cp_error ("multiple initializations given for member `%D'", + field); + continue; + } + + init_list = chainon (init_list, + build_tree_list (name, TREE_VALUE (x))); + /* Make sure we won't try to work on this init again. */ + TREE_PURPOSE (x) = NULL_TREE; + found = 1; + break; + } + } + + /* If we didn't find MEMBER in the list, create a dummy entry + so the two lists (INIT_LIST and the list of members) will be + symmetrical. */ + if (! found) + init_list = chainon (init_list, build_tree_list (NULL_TREE, NULL_TREE)); + } + + for (x = current_member_init_list ; x ; x = TREE_CHAIN (x)) + { + if (TREE_PURPOSE (x)) + { + name = TREE_PURPOSE (x); + init = TREE_VALUE (x); + /* XXX: this may need the COMPONENT_REF operand 0 check if + it turns out we actually get them. */ + field = IDENTIFIER_CLASS_VALUE (name); + + /* If one member shadows another, get the outermost one. */ + if (TREE_CODE (field) == TREE_LIST) + { + field = TREE_VALUE (field); + if (decl_type_context (field) != current_class_type) + cp_error ("field `%D' not in immediate context", field); + } + +#if 0 + /* It turns out if you have an anonymous union in the + class, a member from it can end up not being on the + list of fields (rather, the type is), and therefore + won't be seen by the for loop above. */ + + /* The code in this for loop is derived from a general loop + which had this check in it. Theoretically, we've hit + every initialization for the list of members in T, so + we shouldn't have anything but these left in this list. */ + my_friendly_assert (DECL_FIELD_CONTEXT (field) != t, 351); +#endif + + if (TREE_HAS_CONSTRUCTOR (field)) + { + if (DECL_NAME (field)) + error ("multiple initializations given for member `%s'", + IDENTIFIER_POINTER (DECL_NAME (field))); + continue; + } + + TREE_HAS_CONSTRUCTOR (field) = 1; + fields_to_unmark = tree_cons (NULL_TREE, field, fields_to_unmark); + + perform_member_init (field, name, init, 1); + TREE_PURPOSE (x) = NULL_TREE; + } + } + + /* Unmark fields which are initialized for the base class. */ + while (fields_to_unmark) + { + TREE_HAS_CONSTRUCTOR (TREE_VALUE (fields_to_unmark)) = 0; + /* XXX is this a memory leak? */ + fields_to_unmark = TREE_CHAIN (fields_to_unmark); + } + + return init_list; +} + +/* Perform whatever initializations have yet to be done on the base + class of the class variable. These actions are in the global + variable CURRENT_BASE_INIT_LIST. Such an action could be + NULL_TREE, meaning that the user has explicitly called the base + class constructor with no arguments. + + If there is a need for a call to a constructor, we must surround + that call with a pushlevel/poplevel pair, since we are technically + at the PARM level of scope. + + Argument IMMEDIATELY, if zero, forces a new sequence to be + generated to contain these new insns, so it can be emitted later. + This sequence is saved in the global variable BASE_INIT_INSNS. + Otherwise, the insns are emitted into the current sequence. + + Note that emit_base_init does *not* initialize virtual base + classes. That is done specially, elsewhere. */ + +void +emit_base_init (t, immediately) + tree t; + int immediately; +{ + extern tree in_charge_identifier; + + tree member, decl, vbases; + tree init_list, member_init; + int pass, start; + tree t_binfo = TYPE_BINFO (t); + tree binfos = BINFO_BASETYPES (t_binfo); + int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; + tree fields_to_unmark = NULL_TREE; + int have_init_list = 0, from_init_list; + + if (! immediately) + { + do_pending_stack_adjust (); + start_sequence (); + } + + if (write_symbols == NO_DEBUG) + /* As a matter of principle, `start_sequence' should do this. */ + emit_note (0, -1); + else + /* Always emit a line number note so we can step into constructors. */ + emit_line_note_force (DECL_SOURCE_FILE (current_function_decl), + DECL_SOURCE_LINE (current_function_decl)); + + /* In this case, we always need IN_CHARGE_NODE, because we have + to know whether to deallocate or not before exiting. */ + if (flag_handle_exceptions == 2 + && lookup_name (in_charge_identifier, 0) == NULL_TREE) + { + tree in_charge_node = pushdecl (build_decl (VAR_DECL, in_charge_identifier, + integer_type_node)); + store_init_value (in_charge_node, build (EQ_EXPR, integer_type_node, + current_class_decl, + integer_zero_node)); + expand_decl (in_charge_node); + expand_decl_init (in_charge_node); + } + + start = ! TYPE_USES_VIRTUAL_BASECLASSES (t); + for (pass = start; pass < 2; pass++) + { + tree vbase_init_list = NULL_TREE; + + for (init_list = current_base_init_list; init_list; + init_list = TREE_CHAIN (init_list)) + { + tree basename = TREE_PURPOSE (init_list); + tree binfo; + tree init = TREE_VALUE (init_list); + + if (basename == NULL_TREE) + { + /* Initializer for single base class. Must not + use multiple inheritance or this is ambiguous. */ + switch (n_baseclasses) + { + case 0: + error ("type `%s' does not have a base class to initialize", + IDENTIFIER_POINTER (current_class_name)); + return; + case 1: + break; + default: + error ("unnamed initializer ambiguous for type `%s' which uses multiple inheritance", IDENTIFIER_POINTER (current_class_name)); + return; + } + binfo = TREE_VEC_ELT (binfos, 0); + } + else if (is_aggr_typedef (basename, 1)) + { + binfo = binfo_or_else (IDENTIFIER_TYPE_VALUE (basename), t); + if (binfo == NULL_TREE) + continue; + + /* Virtual base classes are special cases. Their initializers + are recorded with this constructor, and they are used when + this constructor is the top-level constructor called. */ + if (! TREE_VIA_VIRTUAL (binfo)) + { + /* Otherwise, if it is not an immediate base class, complain. */ + for (i = n_baseclasses-1; i >= 0; i--) + if (BINFO_TYPE (binfo) == BINFO_TYPE (TREE_VEC_ELT (binfos, i))) + break; + if (i < 0) + { + error ("type `%s' is not an immediate base class of type `%s'", + IDENTIFIER_POINTER (basename), + IDENTIFIER_POINTER (current_class_name)); + continue; + } + } + } + else + continue; + + /* The base initialization list goes up to the first + base class which can actually use it. */ + + if (pass == start) + { + char *msgp = (! TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (binfo))) + ? "cannot pass initialization up to class `%s'" : 0; + + while (! TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (binfo)) + && BINFO_BASETYPES (binfo) != NULL_TREE + && TREE_VEC_LENGTH (BINFO_BASETYPES (binfo)) == 1) + { + /* ?? This should be fixed in RENO by forcing + default constructors to exist. */ + SET_BINFO_BASEINIT_MARKED (binfo); + binfo = BINFO_BASETYPE (binfo, 0); + } + + /* We used to give an error if this wasn't true, saying that + there's no constructor for the initialization of basename. + This turned out to be incorrect---it should use the + default constructor, since a user could try to initialize + the class in a derived class's base initializer list. */ + if (TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (binfo))) + { + if (msgp) + { + if (pedantic) + error_with_aggr_type (binfo, msgp); + else + msgp = NULL; + } + } + + if (BINFO_BASEINIT_MARKED (binfo)) + { + msgp = "class `%s' initializer already specified"; + error (msgp, IDENTIFIER_POINTER (basename)); + } + + if (msgp) + continue; + + SET_BINFO_BASEINIT_MARKED (binfo); + if (TREE_VIA_VIRTUAL (binfo)) + { + vbase_init_list = tree_cons (init, BINFO_TYPE (binfo), + vbase_init_list); + continue; + } + if (pass == 0) + continue; + } + else if (TREE_VIA_VIRTUAL (binfo)) + continue; + + member = convert_pointer_to (binfo, current_class_decl); + expand_aggr_init_1 (t_binfo, 0, + build_indirect_ref (member, NULL_PTR), init, + BINFO_OFFSET_ZEROP (binfo), LOOKUP_COMPLAIN); + if (flag_handle_exceptions == 2 && TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (binfo))) + { + cplus_expand_start_try (1); + push_exception_cleanup (member); + } + } + + if (pass == 0) + { + tree first_arg = TREE_CHAIN (DECL_ARGUMENTS (current_function_decl)); + tree vbases; + + if (DECL_NAME (current_function_decl) == NULL_TREE + && TREE_CHAIN (first_arg) != NULL_TREE) + { + /* If there are virtual baseclasses without initialization + specified, and this is a default X(X&) constructor, + build the initialization list so that each virtual baseclass + of the new object is initialized from the virtual baseclass + of the incoming arg. */ + tree init_arg = build_unary_op (ADDR_EXPR, TREE_CHAIN (first_arg), 0); + for (vbases = CLASSTYPE_VBASECLASSES (t); + vbases; vbases = TREE_CHAIN (vbases)) + { + if (BINFO_BASEINIT_MARKED (vbases) == 0) + { + member = convert_pointer_to (vbases, init_arg); + if (member == init_arg) + member = TREE_CHAIN (first_arg); + else + TREE_TYPE (member) = build_reference_type (BINFO_TYPE (vbases)); + vbase_init_list = tree_cons (convert_from_reference (member), + vbases, vbase_init_list); + SET_BINFO_BASEINIT_MARKED (vbases); + } + } + } + expand_start_cond (first_arg, 0); + expand_aggr_vbase_init (t_binfo, C_C_D, current_class_decl, + vbase_init_list); + expand_end_cond (); + } + } + current_base_init_list = NULL_TREE; + + /* Now, perform default initialization of all base classes which + have not yet been initialized, and unmark baseclasses which + have been initialized. */ + for (i = 0; i < n_baseclasses; i++) + { + tree base = current_class_decl; + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if (TYPE_NEEDS_CONSTRUCTING (BINFO_TYPE (base_binfo))) + { + if (! TREE_VIA_VIRTUAL (base_binfo) + && ! BINFO_BASEINIT_MARKED (base_binfo)) + { + tree ref; + + if (BINFO_OFFSET_ZEROP (base_binfo)) + base = build1 (NOP_EXPR, + TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), + current_class_decl); + else + base = build (PLUS_EXPR, + TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), + current_class_decl, BINFO_OFFSET (base_binfo)); + + ref = build_indirect_ref (base, NULL_PTR); + expand_aggr_init_1 (t_binfo, 0, ref, NULL_TREE, + BINFO_OFFSET_ZEROP (base_binfo), + LOOKUP_COMPLAIN); + if (flag_handle_exceptions == 2 + && TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) + { + cplus_expand_start_try (1); + push_exception_cleanup (base); + } + } + } + CLEAR_BINFO_BASEINIT_MARKED (base_binfo); + + if (! TYPE_USES_VIRTUAL_BASECLASSES (t)) + { + while (! TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (base_binfo)) + && BINFO_BASETYPES (base_binfo) != NULL_TREE + && TREE_VEC_LENGTH (BINFO_BASETYPES (base_binfo)) == 1) + { + /* ?? This should be fixed in RENO by forcing + default constructors to exist. It is needed for symmetry + with code above. */ + base_binfo = BINFO_BASETYPE (base_binfo, 0); + CLEAR_BINFO_BASEINIT_MARKED (base_binfo); + } + } + } + + /* Initialize all the virtual function table fields that + do come from virtual base classes. */ + if (TYPE_USES_VIRTUAL_BASECLASSES (t)) + expand_expr_stmt (build_vbase_vtables_init (t_binfo, t_binfo, + C_C_D, current_class_decl, 0)); + for (vbases = CLASSTYPE_VBASECLASSES (t); vbases; vbases = TREE_CHAIN (vbases)) + CLEAR_BINFO_BASEINIT_MARKED (vbases); + + /* Initialize all the virtual function table fields that + do not come from virtual base classes. */ + init_vtbl_ptrs (t_binfo, 0, 1); + + if (CLASSTYPE_NEEDS_VIRTUAL_REINIT (t)) + expand_expr_stmt (build_virtual_init (TYPE_BINFO (t), t, + current_class_decl)); + + if (current_member_init_list) + { + init_list = sort_member_init (t); + have_init_list = 1; + } + + for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) + { + tree init, name; + from_init_list = 0; + + /* See if we had a user-specified member initialization. */ + if (have_init_list) + { + if (TREE_PURPOSE (init_list)) + { + name = TREE_PURPOSE (init_list); + init = TREE_VALUE (init_list); + from_init_list = 1; + + if (TREE_STATIC (member)) + { + error_with_aggr_type (DECL_FIELD_CONTEXT (member), + "field `%s::%s' is static; only point of initialization is its declaration", + IDENTIFIER_POINTER (TREE_PURPOSE (init_list))); + continue; + } + + /* Also see if it's ever a COMPONENT_REF here. If it is, we + need to do `expand_assignment (name, init, 0, 0);' and + a continue. */ + my_friendly_assert (TREE_CODE (name) != COMPONENT_REF, 349); + } + + init_list = TREE_CHAIN (init_list); + } + + if (! from_init_list) + { + /* member could be, for example, a CONST_DECL for an enumerated + tag; we don't want to try to initialize that, since it already + has a value. */ + if (TREE_CODE (member) != FIELD_DECL) + continue; + + name = DECL_NAME (member); + init = DECL_INITIAL (member); + } + + perform_member_init (member, name, init, from_init_list); + } + + current_member_init_list = NULL_TREE; + + /* It is possible for the initializers to need cleanups. + Expand those cleanups now that all the initialization + has been done. */ + expand_cleanups_to (NULL_TREE); + + if (! immediately) + { + extern rtx base_init_insns; + + do_pending_stack_adjust (); + my_friendly_assert (base_init_insns == 0, 207); + base_init_insns = get_insns (); + end_sequence (); + } + + /* All the implicit try blocks we built up will be zapped + when we come to a real binding contour boundary. */ +} + +/* Check that all fields are properly initialized after + an assignment to `this'. */ +void +check_base_init (t) + tree t; +{ + tree member; + for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) + if (DECL_NAME (member) && TREE_USED (member)) + cp_error ("field `%D' used before initialized (after assignment to `this')", + member); +} + +/* This code sets up the virtual function tables appropriate for + the pointer DECL. It is a one-ply initialization. + + BINFO is the exact type that DECL is supposed to be. In + multiple inheritance, this might mean "C's A" if C : A, B. */ +tree +build_virtual_init (main_binfo, binfo, decl) + tree main_binfo, binfo; + tree decl; +{ + tree type; + tree vtbl, vtbl_ptr; + tree vtype, vtype_binfo; + + if (TREE_CODE (binfo) == TREE_VEC) + type = BINFO_TYPE (binfo); + else if (TREE_CODE (binfo) == RECORD_TYPE) + { + type = binfo; + binfo = TYPE_BINFO (type); + } + else + my_friendly_abort (46); + + vtype = DECL_CONTEXT (CLASSTYPE_VFIELD (type)); + vtype_binfo = get_binfo (vtype, TREE_TYPE (TREE_TYPE (decl)), 0); +#if 0 + /* This code suggests that it's time to rewrite how we handle + replicated baseclasses in G++. */ + if (get_base_distance (vtype, TREE_TYPE (TREE_TYPE (decl)), + 0, (tree *) 0) == -2) + { + tree binfos = TYPE_BINFO_BASETYPES (TREE_TYPE (TREE_TYPE (decl))); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + tree result = NULL_TREE; + + for (i = n_baselinks-1; i >= 0; i--) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree this_decl; + + if (get_base_distance (vtype, BINFO_TYPE (base_binfo), 0, 0) == -1) + continue; + + if (TREE_VIA_VIRTUAL (base_binfo)) + this_decl = build_vbase_pointer (build_indirect_ref (decl, NULL_PTR), BINFO_TYPE (base_binfo)); + else if (BINFO_OFFSET_ZEROP (base_binfo)) + this_decl = build1 (NOP_EXPR, TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), + decl); + else + this_decl = build (PLUS_EXPR, TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), + decl, BINFO_OFFSET (base_binfo)); + result = tree_cons (NULL_TREE, build_virtual_init (main_binfo, base_binfo, this_decl), result); + } + return build_compound_expr (result); + } +#endif + + { +#if 1 +#if 1 + vtbl = BINFO_VTABLE (binfo_value (DECL_FIELD_CONTEXT (CLASSTYPE_VFIELD (type)), binfo)); +#else + /* The below does not work when we have to step through the + vfield, on our way down to the most base class for the + vfield. */ + vtbl = BINFO_VTABLE (binfo_value (DECL_FIELD_CONTEXT (CLASSTYPE_VFIELD (type)), + BINFO_TYPE (main_binfo))); +#endif +#else + my_friendly_assert (BINFO_TYPE (main_binfo) == BINFO_TYPE (binfo), 208); + vtbl = BINFO_VTABLE (main_binfo); +#endif /* 1 */ + assemble_external (vtbl); + TREE_USED (vtbl) = 1; + vtbl = build1 (ADDR_EXPR, TYPE_POINTER_TO (TREE_TYPE (vtbl)), vtbl); + } + decl = convert_pointer_to_real (vtype_binfo, decl); + vtbl_ptr = build_vfield_ref (build_indirect_ref (decl, NULL_PTR), vtype); + if (vtbl_ptr == error_mark_node) + return error_mark_node; + + /* Have to convert VTBL since array sizes may be different. */ + return build_modify_expr (vtbl_ptr, NOP_EXPR, + convert (TREE_TYPE (vtbl_ptr), vtbl)); +} + +/* Subroutine of `expand_aggr_vbase_init'. + BINFO is the binfo of the type that is being initialized. + INIT_LIST is the list of initializers for the virtual baseclass. */ +static void +expand_aggr_vbase_init_1 (binfo, exp, addr, init_list) + tree binfo, exp, addr, init_list; +{ + tree init = value_member (BINFO_TYPE (binfo), init_list); + tree ref = build_indirect_ref (addr, NULL_PTR); + if (init) + init = TREE_PURPOSE (init); + /* Call constructors, but don't set up vtables. */ + expand_aggr_init_1 (binfo, exp, ref, init, 0, + LOOKUP_COMPLAIN|LOOKUP_SPECULATIVELY); + CLEAR_BINFO_VBASE_INIT_MARKED (binfo); +} + +/* Initialize this object's virtual base class pointers. This must be + done only at the top-level of the object being constructed. + + INIT_LIST is list of initialization for constructor to perform. */ +static void +expand_aggr_vbase_init (binfo, exp, addr, init_list) + tree binfo; + tree exp; + tree addr; + tree init_list; +{ + tree type = BINFO_TYPE (binfo); + + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + tree result = init_vbase_pointers (type, addr); + tree vbases; + + if (result) + expand_expr_stmt (build_compound_expr (result)); + + /* Mark everything as having an initializer + (either explicit or default). */ + for (vbases = CLASSTYPE_VBASECLASSES (type); + vbases; vbases = TREE_CHAIN (vbases)) + SET_BINFO_VBASE_INIT_MARKED (vbases); + + /* First, initialize baseclasses which could be baseclasses + for other virtual baseclasses. */ + for (vbases = CLASSTYPE_VBASECLASSES (type); + vbases; vbases = TREE_CHAIN (vbases)) + /* Don't initialize twice. */ + if (BINFO_VBASE_INIT_MARKED (vbases)) + { + tree tmp = result; + + while (BINFO_TYPE (vbases) != BINFO_TYPE (TREE_PURPOSE (tmp))) + tmp = TREE_CHAIN (tmp); + expand_aggr_vbase_init_1 (vbases, exp, + TREE_OPERAND (TREE_VALUE (tmp), 0), + init_list); + } + + /* Now initialize the baseclasses which don't have virtual baseclasses. */ + for (; result; result = TREE_CHAIN (result)) + /* Don't initialize twice. */ + if (BINFO_VBASE_INIT_MARKED (TREE_PURPOSE (result))) + { + my_friendly_abort (47); + expand_aggr_vbase_init_1 (TREE_PURPOSE (result), exp, + TREE_OPERAND (TREE_VALUE (result), 0), + init_list); + } + } +} + +/* Subroutine to perform parser actions for member initialization. + S_ID is the scoped identifier. + NAME is the name of the member. + INIT is the initializer, or `void_type_node' if none. */ +void +do_member_init (s_id, name, init) + tree s_id, name, init; +{ + tree binfo, base; + + if (current_class_type == NULL_TREE + || ! is_aggr_typedef (s_id, 1)) + return; + binfo = get_binfo (IDENTIFIER_TYPE_VALUE (s_id), + current_class_type, 1); + if (binfo == error_mark_node) + return; + if (binfo == 0) + { + error_not_base_type (IDENTIFIER_TYPE_VALUE (s_id), current_class_type); + return; + } + + base = convert_pointer_to (binfo, current_class_decl); + expand_member_init (build_indirect_ref (base, NULL_PTR), name, init); +} + +/* Function to give error message if member initialization specification + is erroneous. FIELD is the member we decided to initialize. + TYPE is the type for which the initialization is being performed. + FIELD must be a member of TYPE, or the base type from which FIELD + comes must not need a constructor. + + MEMBER_NAME is the name of the member. */ + +static int +member_init_ok_or_else (field, type, member_name) + tree field; + tree type; + char *member_name; +{ + if (field == error_mark_node) + return 0; + if (field == NULL_TREE) + { + cp_error ("class `%T' does not have any field named `%s'", type, + member_name); + return 0; + } + if (DECL_CONTEXT (field) != type + && TYPE_NEEDS_CONSTRUCTING (DECL_CONTEXT (field))) + { + cp_error ("member `%D' comes from base class needing constructor", + field); + return 0; + } + return 1; +} + +/* If NAME is a viable field name for the aggregate DECL, + and PARMS is a viable parameter list, then expand an _EXPR + which describes this initialization. + + Note that we do not need to chase through the class's base classes + to look for NAME, because if it's in that list, it will be handled + by the constructor for that base class. + + We do not yet have a fixed-point finder to instantiate types + being fed to overloaded constructors. If there is a unique + constructor, then argument types can be got from that one. + + If INIT is non-NULL, then it the initialization should + be placed in `current_base_init_list', where it will be processed + by `emit_base_init'. */ +void +expand_member_init (exp, name, init) + tree exp, name, init; +{ + extern tree ptr_type_node; /* should be in tree.h */ + + tree basetype = NULL_TREE, field; + tree parm; + tree rval, type; + tree actual_name; + + if (exp == NULL_TREE) + return; /* complain about this later */ + + type = TYPE_MAIN_VARIANT (TREE_TYPE (exp)); + + if (name == NULL_TREE && IS_AGGR_TYPE (type)) + switch (CLASSTYPE_N_BASECLASSES (type)) + { + case 0: + error ("base class initializer specified, but no base class to initialize"); + return; + case 1: + basetype = TYPE_BINFO_BASETYPE (type, 0); + break; + default: + error ("initializer for unnamed base class ambiguous"); + cp_error ("(type `%T' uses multiple inheritance)", type); + return; + } + + if (init) + { + /* The grammar should not allow fields which have names + that are TYPENAMEs. Therefore, if the field has + a non-NULL TREE_TYPE, we may assume that this is an + attempt to initialize a base class member of the current + type. Otherwise, it is an attempt to initialize a + member field. */ + + if (init == void_type_node) + init = NULL_TREE; + + if (name == NULL_TREE || IDENTIFIER_HAS_TYPE_VALUE (name)) + { + tree base_init; + + if (name == NULL_TREE) + { +/* + if (basetype) + name = TYPE_IDENTIFIER (basetype); + else + { + error ("no base class to initialize"); + return; + } +*/ + } + else + { + basetype = IDENTIFIER_TYPE_VALUE (name); + if (basetype != type + && ! binfo_member (basetype, TYPE_BINFO (type)) + && ! binfo_member (basetype, CLASSTYPE_VBASECLASSES (type))) + { + if (IDENTIFIER_CLASS_VALUE (name)) + goto try_member; + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + error ("type `%s' is not an immediate or virtual basetype for `%s'", + IDENTIFIER_POINTER (name), + TYPE_NAME_STRING (type)); + else + error ("type `%s' is not an immediate basetype for `%s'", + IDENTIFIER_POINTER (name), + TYPE_NAME_STRING (type)); + return; + } + } + + if (purpose_member (name, current_base_init_list)) + { + error ("base class `%s' already initialized", + IDENTIFIER_POINTER (name)); + return; + } + + base_init = build_tree_list (name, init); + TREE_TYPE (base_init) = basetype; + current_base_init_list = chainon (current_base_init_list, base_init); + } + else + { + tree member_init; + + try_member: + field = lookup_field (type, name, 1, 0); + + if (! member_init_ok_or_else (field, type, IDENTIFIER_POINTER (name))) + return; + + if (purpose_member (name, current_member_init_list)) + { + error ("field `%s' already initialized", IDENTIFIER_POINTER (name)); + return; + } + + member_init = build_tree_list (name, init); + TREE_TYPE (member_init) = TREE_TYPE (field); + current_member_init_list = chainon (current_member_init_list, member_init); + } + return; + } + else if (name == NULL_TREE) + { + compiler_error ("expand_member_init: name == NULL_TREE"); + return; + } + + basetype = type; + field = lookup_field (basetype, name, 0, 0); + + if (! member_init_ok_or_else (field, basetype, IDENTIFIER_POINTER (name))) + return; + + /* now see if there is a constructor for this type + which will take these args. */ + + if (TYPE_HAS_CONSTRUCTOR (TREE_TYPE (field))) + { + tree parmtypes, fndecl; + + if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) + { + /* just know that we've seen something for this node */ + DECL_INITIAL (exp) = error_mark_node; + TREE_USED (exp) = 1; + } + type = TYPE_MAIN_VARIANT (TREE_TYPE (field)); + actual_name = TYPE_IDENTIFIER (type); + parm = build_component_ref (exp, name, 0, 0); + + /* Now get to the constructor. */ + fndecl = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0); + /* Get past destructor, if any. */ + if (TYPE_HAS_DESTRUCTOR (type)) + fndecl = DECL_CHAIN (fndecl); + + if (fndecl) + my_friendly_assert (TREE_CODE (fndecl) == FUNCTION_DECL, 209); + + /* If the field is unique, we can use the parameter + types to guide possible type instantiation. */ + if (DECL_CHAIN (fndecl) == NULL_TREE) + { + /* There was a confusion here between + FIELD and FNDECL. The following code + should be correct, but abort is here + to make sure. */ + my_friendly_abort (48); + parmtypes = FUNCTION_ARG_CHAIN (fndecl); + } + else + { + parmtypes = NULL_TREE; + fndecl = NULL_TREE; + } + + init = convert_arguments (parm, parmtypes, NULL_TREE, fndecl, LOOKUP_NORMAL); + if (init == NULL_TREE || TREE_TYPE (init) != error_mark_node) + rval = build_method_call (NULL_TREE, actual_name, init, NULL_TREE, LOOKUP_NORMAL); + else + return; + + if (rval != error_mark_node) + { + /* Now, fill in the first parm with our guy */ + TREE_VALUE (TREE_OPERAND (rval, 1)) + = build_unary_op (ADDR_EXPR, parm, 0); + TREE_TYPE (rval) = ptr_type_node; + TREE_SIDE_EFFECTS (rval) = 1; + } + } + else if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (field))) + { + parm = build_component_ref (exp, name, 0, 0); + expand_aggr_init (parm, NULL_TREE, 0); + rval = error_mark_node; + } + + /* Now initialize the member. It does not have to + be of aggregate type to receive initialization. */ + if (rval != error_mark_node) + expand_expr_stmt (rval); +} + +/* This is like `expand_member_init', only it stores one aggregate + value into another. + + INIT comes in two flavors: it is either a value which + is to be stored in EXP, or it is a parameter list + to go to a constructor, which will operate on EXP. + If `init' is a CONSTRUCTOR, then we emit a warning message, + explaining that such initializations are illegal. + + ALIAS_THIS is nonzero iff we are initializing something which is + essentially an alias for C_C_D. In this case, the base constructor + may move it on us, and we must keep track of such deviations. + + If INIT resolves to a CALL_EXPR which happens to return + something of the type we are looking for, then we know + that we can safely use that call to perform the + initialization. + + The virtual function table pointer cannot be set up here, because + we do not really know its type. + + Virtual baseclass pointers are also set up here. + + This never calls operator=(). + + When initializing, nothing is CONST. + + A default copy constructor may have to be used to perform the + initialization. + + A constructor or a conversion operator may have to be used to + perform the initialization, but not both, as it would be ambiguous. + */ + +void +expand_aggr_init (exp, init, alias_this) + tree exp, init; + int alias_this; +{ + tree type = TREE_TYPE (exp); + int was_const = TREE_READONLY (exp); + + if (init == error_mark_node) + return; + + TREE_READONLY (exp) = 0; + + if (TREE_CODE (type) == ARRAY_TYPE) + { + /* Must arrange to initialize each element of EXP + from elements of INIT. */ + int was_const_elts = TYPE_READONLY (TREE_TYPE (type)); + tree itype = init ? TREE_TYPE (init) : NULL_TREE; + if (was_const_elts) + { + tree atype = build_cplus_array_type (TYPE_MAIN_VARIANT (TREE_TYPE (type)), + TYPE_DOMAIN (type)); + if (init && (TREE_TYPE (exp) == TREE_TYPE (init))) + TREE_TYPE (init) = atype; + TREE_TYPE (exp) = atype; + } + if (init && TREE_TYPE (init) == NULL_TREE) + { + /* Handle bad initializers like: + class COMPLEX { + public: + double re, im; + COMPLEX(double r = 0.0, double i = 0.0) {re = r; im = i;}; + ~COMPLEX() {}; + }; + + int main(int argc, char **argv) { + COMPLEX zees(1.0, 0.0)[10]; + } + */ + error ("bad array initializer"); + return; + } + expand_vec_init (exp, exp, array_type_nelts (type), init, + init && comptypes (TREE_TYPE (init), TREE_TYPE (exp), 1)); + TREE_READONLY (exp) = was_const; + TREE_TYPE (exp) = type; + if (init) TREE_TYPE (init) = itype; + return; + } + + if (TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == PARM_DECL) + /* just know that we've seen something for this node */ + TREE_USED (exp) = 1; + +#if 0 + /* If initializing from a GNU C CONSTRUCTOR, consider the elts in the + constructor as parameters to an implicit GNU C++ constructor. */ + if (init && TREE_CODE (init) == CONSTRUCTOR + && TYPE_HAS_CONSTRUCTOR (type) + && TREE_TYPE (init) == type) + init = CONSTRUCTOR_ELTS (init); +#endif + expand_aggr_init_1 (TYPE_BINFO (type), exp, exp, + init, alias_this, LOOKUP_NORMAL); + TREE_READONLY (exp) = was_const; +} + +static void +expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags) + tree binfo; + tree true_exp, exp; + tree type; + tree init; + int alias_this; + int flags; +{ + /* It fails because there may not be a constructor which takes + its own type as the first (or only parameter), but which does + take other types via a conversion. So, if the thing initializing + the expression is a unit element of type X, first try X(X&), + followed by initialization by X. If neither of these work + out, then look hard. */ + tree rval; + tree parms; + int xxref_init_possible; + + if (init == NULL_TREE || TREE_CODE (init) == TREE_LIST) + { + parms = init; + if (parms) init = TREE_VALUE (parms); + } + else if (TREE_CODE (init) == INDIRECT_REF && TREE_HAS_CONSTRUCTOR (init)) + { + rval = convert_for_initialization (exp, type, init, 0, 0, 0, 0); + expand_expr_stmt (rval); + return; + } + else + parms = build_tree_list (NULL_TREE, init); + + if (TYPE_HAS_INIT_REF (type) + || init == NULL_TREE + || TREE_CHAIN (parms) != NULL_TREE) + xxref_init_possible = 0; + else + { + xxref_init_possible = LOOKUP_SPECULATIVELY; + flags &= ~LOOKUP_COMPLAIN; + } + + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + if (true_exp == exp) + parms = tree_cons (NULL_TREE, integer_one_node, parms); + else + parms = tree_cons (NULL_TREE, integer_zero_node, parms); + flags |= LOOKUP_HAS_IN_CHARGE; + } + + rval = build_method_call (exp, constructor_name_full (type), + parms, binfo, flags|xxref_init_possible); + if (rval == NULL_TREE && xxref_init_possible) + { + /* It is an error to implement a default copy constructor if + (see ARM 12.8 for details) ... one case being if another + copy constructor already exists. */ + tree init_type = TREE_TYPE (init); + if (TREE_CODE (init_type) == REFERENCE_TYPE) + init_type = TREE_TYPE (init_type); + if (TYPE_MAIN_VARIANT (init_type) == TYPE_MAIN_VARIANT (type) + || (IS_AGGR_TYPE (init_type) + && UNIQUELY_DERIVED_FROM_P (type, init_type))) + { + if (type == BINFO_TYPE (binfo) + && TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + tree addr = build_unary_op (ADDR_EXPR, exp, 0); + expand_aggr_vbase_init (binfo, exp, addr, NULL_TREE); + + expand_expr_stmt (build_vbase_vtables_init (binfo, binfo, + exp, addr, 1)); + } + expand_expr_stmt (build_modify_expr (exp, INIT_EXPR, init)); + return; + } + else + rval = build_method_call (exp, constructor_name_full (type), parms, + binfo, flags); + } + + /* Private, protected, or otherwise unavailable. */ + if (rval == error_mark_node && (flags&LOOKUP_COMPLAIN)) + cp_error ("in base initialization for class `%T'", binfo); + /* A valid initialization using constructor. */ + else if (rval != error_mark_node && rval != NULL_TREE) + { + /* p. 222: if the base class assigns to `this', then that + value is used in the derived class. */ + if ((flag_this_is_variable & 1) && alias_this) + { + TREE_TYPE (rval) = TREE_TYPE (current_class_decl); + expand_assignment (current_class_decl, rval, 0, 0); + } + else + expand_expr_stmt (rval); + } + else if (parms && TREE_CHAIN (parms) == NULL_TREE) + { + /* If we are initializing one aggregate value + from another, and though there are constructors, + and none accept the initializer, just do a bitwise + copy. + + The above sounds wrong, ``If a class has any copy + constructor defined, the default copy constructor will + not be generated.'' 12.8 Copying Class Objects (mrs) + + @@ This should reject initializer which a constructor + @@ rejected on access gounds, but there is + @@ no way right now to recognize that case with + @@ just `error_mark_node'. */ + tree itype; + init = TREE_VALUE (parms); + itype = TREE_TYPE (init); + if (TREE_CODE (itype) == REFERENCE_TYPE) + { + init = convert_from_reference (init); + itype = TREE_TYPE (init); + } + itype = TYPE_MAIN_VARIANT (itype); + + /* This is currently how the default X(X&) constructor + is implemented. */ + if (comptypes (TYPE_MAIN_VARIANT (type), itype, 0)) + { +#if 0 + warning ("bitwise copy in initialization of type `%s'", + TYPE_NAME_STRING (type)); +#endif + rval = build (INIT_EXPR, type, exp, init); + expand_expr_stmt (rval); + } + else + { + cp_error ("in base initialization for class `%T',", binfo); + cp_error ("invalid initializer to constructor for type `%T'", type); + return; + } + } + else + { + if (init == NULL_TREE) + my_friendly_assert (parms == NULL_TREE, 210); + if (parms == NULL_TREE && TREE_VIA_VIRTUAL (binfo)) + cp_error ("virtual baseclass `%T' does not have default initializer", binfo); + else + { + cp_error ("in base initialization for class `%T',", binfo); + /* This will make an error message for us. */ + build_method_call (exp, constructor_name_full (type), parms, binfo, + (TYPE_USES_VIRTUAL_BASECLASSES (type) + ? LOOKUP_NORMAL|LOOKUP_HAS_IN_CHARGE + : LOOKUP_NORMAL)); + } + return; + } + /* Constructor has been called, but vtables may be for TYPE + rather than for FOR_TYPE. */ +} + +/* This function is responsible for initializing EXP with INIT + (if any). + + BINFO is the binfo of the type for who we are performing the + initialization. For example, if W is a virtual base class of A and B, + and C : A, B. + If we are initializing B, then W must contain B's W vtable, whereas + were we initializing C, W must contain C's W vtable. + + TRUE_EXP is nonzero if it is the true expression being initialized. + In this case, it may be EXP, or may just contain EXP. The reason we + need this is because if EXP is a base element of TRUE_EXP, we + don't necessarily know by looking at EXP where its virtual + baseclass fields should really be pointing. But we do know + from TRUE_EXP. In constructors, we don't know anything about + the value being initialized. + + ALIAS_THIS serves the same purpose it serves for expand_aggr_init. + + FLAGS is just passes to `build_method_call'. See that function for + its description. */ + +static void +expand_aggr_init_1 (binfo, true_exp, exp, init, alias_this, flags) + tree binfo; + tree true_exp, exp; + tree init; + int alias_this; + int flags; +{ + tree type = TREE_TYPE (exp); + tree init_type = NULL_TREE; + tree rval; + + my_friendly_assert (init != error_mark_node && type != error_mark_node, 211); + + /* Use a function returning the desired type to initialize EXP for us. + If the function is a constructor, and its first argument is + NULL_TREE, know that it was meant for us--just slide exp on + in and expand the constructor. Constructors now come + as TARGET_EXPRs. */ + if (init) + { + tree init_list = NULL_TREE; + + if (TREE_CODE (init) == TREE_LIST) + { + init_list = init; + if (TREE_CHAIN (init) == NULL_TREE) + init = TREE_VALUE (init); + } + + init_type = TREE_TYPE (init); + + if (TREE_CODE (init) != TREE_LIST) + { + if (TREE_CODE (init_type) == ERROR_MARK) + return; + +#if 0 + /* These lines are found troublesome 5/11/89. */ + if (TREE_CODE (init_type) == REFERENCE_TYPE) + init_type = TREE_TYPE (init_type); +#endif + + /* This happens when we use C++'s functional cast notation. + If the types match, then just use the TARGET_EXPR + directly. Otherwise, we need to create the initializer + separately from the object being initialized. */ + if (TREE_CODE (init) == TARGET_EXPR) + { + if (init_type == type) + { + if (TREE_CODE (exp) == VAR_DECL + || TREE_CODE (exp) == RESULT_DECL) + /* Unify the initialization targets. */ + DECL_RTL (TREE_OPERAND (init, 0)) = DECL_RTL (exp); + else + DECL_RTL (TREE_OPERAND (init, 0)) = expand_expr (exp, NULL_RTX, 0, 0); + + expand_expr_stmt (init); + return; + } + else + { + init = TREE_OPERAND (init, 1); + init = build (CALL_EXPR, init_type, + TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), 0); + TREE_SIDE_EFFECTS (init) = 1; +#if 0 + TREE_RAISES (init) = ?? +#endif + if (init_list) + TREE_VALUE (init_list) = init; + } + } + + if (init_type == type && TREE_CODE (init) == CALL_EXPR +#if 0 + /* It is legal to directly initialize from a CALL_EXPR + without going through X(X&), apparently. */ + && ! TYPE_GETS_INIT_REF (type) +#endif + ) + { + /* A CALL_EXPR is a legitimate form of initialization, so + we should not print this warning message. */ +#if 0 + /* Should have gone away due to 5/11/89 change. */ + if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE) + init = convert_from_reference (init); +#endif + expand_assignment (exp, init, 0, 0); + if (exp == DECL_RESULT (current_function_decl)) + { + /* Failing this assertion means that the return value + from receives multiple initializations. */ + my_friendly_assert (DECL_INITIAL (exp) == NULL_TREE + || DECL_INITIAL (exp) == error_mark_node, + 212); + DECL_INITIAL (exp) = init; + } + return; + } + else if (init_type == type + && TREE_CODE (init) == COND_EXPR) + { + /* Push value to be initialized into the cond, where possible. + Avoid spurious warning messages when initializing the + result of this function. */ + TREE_OPERAND (init, 1) + = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 1)); + if (exp == DECL_RESULT (current_function_decl)) + DECL_INITIAL (exp) = NULL_TREE; + TREE_OPERAND (init, 2) + = build_modify_expr (exp, INIT_EXPR, TREE_OPERAND (init, 2)); + if (exp == DECL_RESULT (current_function_decl)) + DECL_INITIAL (exp) = init; + TREE_SIDE_EFFECTS (init) = 1; + expand_expr (init, const0_rtx, VOIDmode, 0); + free_temp_slots (); + return; + } + } + + /* We did not know what we were initializing before. Now we do. */ + if (TREE_CODE (init) == TARGET_EXPR) + { + tree tmp = TREE_OPERAND (TREE_OPERAND (init, 1), 1); + + if (TREE_CODE (TREE_VALUE (tmp)) == NOP_EXPR + && TREE_OPERAND (TREE_VALUE (tmp), 0) == integer_zero_node) + { + /* In order for this to work for RESULT_DECLs, if their + type has a constructor, then they must be BLKmode + so that they will be meaningfully addressable. */ + tree arg = build_unary_op (ADDR_EXPR, exp, 0); + init = TREE_OPERAND (init, 1); + init = build (CALL_EXPR, build_pointer_type (TREE_TYPE (init)), + TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), 0); + TREE_SIDE_EFFECTS (init) = 1; +#if 0 + TREE_RAISES (init) = ?? +#endif + TREE_VALUE (TREE_OPERAND (init, 1)) + = convert_pointer_to (TREE_TYPE (TREE_TYPE (TREE_VALUE (tmp))), arg); + + if (alias_this) + { + expand_assignment (current_function_decl, init, 0, 0); + return; + } + if (exp == DECL_RESULT (current_function_decl)) + { + if (DECL_INITIAL (DECL_RESULT (current_function_decl))) + fatal ("return value from function receives multiple initializations"); + DECL_INITIAL (exp) = init; + } + expand_expr_stmt (init); + return; + } + } + + if (TREE_CODE (exp) == VAR_DECL + && TREE_CODE (init) == CONSTRUCTOR + && TREE_HAS_CONSTRUCTOR (init)) + { + tree t = store_init_value (exp, init); + if (!t) + { + expand_decl_init (exp); + return; + } + t = build (INIT_EXPR, type, exp, init); + TREE_SIDE_EFFECTS (t) = 1; + expand_expr_stmt (t); + return; + } + + /* Handle this case: when calling a constructor: xyzzy foo(bar); + which really means: xyzzy foo = bar; Ugh! + + More useful for this case: xyzzy *foo = new xyzzy (bar); */ + + if (! TYPE_NEEDS_CONSTRUCTING (type) && ! IS_AGGR_TYPE (type)) + { + if (init_list && TREE_CHAIN (init_list)) + { + warning ("initializer list being treated as compound expression"); + init = convert (type, build_compound_expr (init_list)); + if (init == error_mark_node) + return; + } + + expand_assignment (exp, init, 0, 0); + + return; + } + /* See whether we can go through a type conversion operator. + This wins over going through a non-existent constructor. If + there is a constructor, it is ambiguous. */ + if (TREE_CODE (init) != TREE_LIST) + { + tree ttype = TREE_CODE (init_type) == REFERENCE_TYPE + ? TREE_TYPE (init_type) : init_type; + + if (ttype != type && IS_AGGR_TYPE (ttype)) + { + tree rval = build_type_conversion (CONVERT_EXPR, type, init, 0); + + if (rval) + { + /* See if there is a constructor for``type'' that takes a + ``ttype''-typed object. */ + tree parms = build_tree_list (NULL_TREE, init); + tree as_cons = NULL_TREE; + if (TYPE_HAS_CONSTRUCTOR (type)) + as_cons = build_method_call (exp, constructor_name_full (type), + parms, binfo, + LOOKUP_SPECULATIVELY|LOOKUP_NO_CONVERSION); + if (as_cons != NULL_TREE && as_cons != error_mark_node) + /* ANSI C++ June 5 1992 WP 12.3.2.6.1 */ + cp_error ("ambiguity between conversion to `%T' and constructor", + type); + else + expand_assignment (exp, rval, 0, 0); + return; + } + } + } + } + + /* Handle default copy constructors here, does not matter if there is + a constructor or not. */ + if (type == init_type && IS_AGGR_TYPE (type) + && init && TREE_CODE (init) != TREE_LIST) + expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags); + /* Not sure why this is here... */ + else if (TYPE_HAS_CONSTRUCTOR (type)) + expand_default_init (binfo, true_exp, exp, type, init, alias_this, flags); + else if (TREE_CODE (type) == ARRAY_TYPE) + { + if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (type))) + expand_vec_init (exp, exp, array_type_nelts (type), init, 0); + else if (TYPE_VIRTUAL_P (TREE_TYPE (type))) + sorry ("arrays of objects with virtual functions but no constructors"); + } + else + expand_recursive_init (binfo, true_exp, exp, init, + CLASSTYPE_BASE_INIT_LIST (type), alias_this); +} + +/* A pointer which holds the initializer. First call to + expand_aggr_init gets this value pointed to, and sets it to init_null. */ +static tree *init_ptr, init_null; + +/* Subroutine of expand_recursive_init: + + ADDR is the address of the expression being initialized. + INIT_LIST is the cons-list of initializations to be performed. + ALIAS_THIS is its same, lovable self. */ +static void +expand_recursive_init_1 (binfo, true_exp, addr, init_list, alias_this) + tree binfo, true_exp, addr; + tree init_list; + int alias_this; +{ + while (init_list) + { + if (TREE_PURPOSE (init_list)) + { + if (TREE_CODE (TREE_PURPOSE (init_list)) == FIELD_DECL) + { + tree member = TREE_PURPOSE (init_list); + tree subexp = build_indirect_ref (convert_pointer_to (TREE_VALUE (init_list), addr), NULL_PTR); + tree member_base = build (COMPONENT_REF, TREE_TYPE (member), subexp, member); + if (IS_AGGR_TYPE (TREE_TYPE (member))) + expand_aggr_init (member_base, DECL_INITIAL (member), 0); + else if (TREE_CODE (TREE_TYPE (member)) == ARRAY_TYPE + && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (member))) + { + member_base = save_expr (default_conversion (member_base)); + expand_vec_init (member, member_base, + array_type_nelts (TREE_TYPE (member)), + DECL_INITIAL (member), 0); + } + else + expand_expr_stmt (build_modify_expr (member_base, INIT_EXPR, DECL_INITIAL (member))); + } + else if (TREE_CODE (TREE_PURPOSE (init_list)) == TREE_LIST) + { + expand_recursive_init_1 (binfo, true_exp, addr, TREE_PURPOSE (init_list), alias_this); + expand_recursive_init_1 (binfo, true_exp, addr, TREE_VALUE (init_list), alias_this); + } + else if (TREE_CODE (TREE_PURPOSE (init_list)) == ERROR_MARK) + { + /* Only initialize the virtual function tables if we + are initializing the ultimate users of those vtables. */ + if (TREE_VALUE (init_list)) + { + /* We have to ensure that the second argment to + build_virtual_init is in binfo's hierarchy. */ + expand_expr_stmt (build_virtual_init (binfo, + get_binfo (TREE_VALUE (init_list), binfo, 0), + addr)); + if (TREE_VALUE (init_list) == binfo + && TYPE_USES_VIRTUAL_BASECLASSES (BINFO_TYPE (binfo))) + expand_expr_stmt (build_vbase_vtables_init (binfo, binfo, true_exp, addr, 1)); + } + } + else + my_friendly_abort (49); + } + else if (TREE_VALUE (init_list) + && TREE_CODE (TREE_VALUE (init_list)) == TREE_VEC) + { + tree subexp = build_indirect_ref (convert_pointer_to (TREE_VALUE (init_list), addr), NULL_PTR); + expand_aggr_init_1 (binfo, true_exp, subexp, *init_ptr, + alias_this && BINFO_OFFSET_ZEROP (TREE_VALUE (init_list)), + LOOKUP_COMPLAIN); + + /* INIT_PTR is used up. */ + init_ptr = &init_null; + } + else + my_friendly_abort (50); + init_list = TREE_CHAIN (init_list); + } +} + +/* Initialize EXP with INIT. Type EXP does not have a constructor, + but it has a baseclass with a constructor or a virtual function + table which needs initializing. + + INIT_LIST is a cons-list describing what parts of EXP actually + need to be initialized. INIT is given to the *unique*, first + constructor within INIT_LIST. If there are multiple first + constructors, such as with multiple inheritance, INIT must + be zero or an ambiguity error is reported. + + ALIAS_THIS is passed from `expand_aggr_init'. See comments + there. */ + +static void +expand_recursive_init (binfo, true_exp, exp, init, init_list, alias_this) + tree binfo, true_exp, exp, init; + tree init_list; + int alias_this; +{ + tree *old_init_ptr = init_ptr; + tree addr = build_unary_op (ADDR_EXPR, exp, 0); + init_ptr = &init; + + if (true_exp == exp && TYPE_USES_VIRTUAL_BASECLASSES (BINFO_TYPE (binfo))) + { + expand_aggr_vbase_init (binfo, exp, addr, init_list); + expand_expr_stmt (build_vbase_vtables_init (binfo, binfo, true_exp, addr, 1)); + } + expand_recursive_init_1 (binfo, true_exp, addr, init_list, alias_this); + + if (*init_ptr) + { + tree type = TREE_TYPE (exp); + + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + if (IS_AGGR_TYPE (type)) + cp_error ("unexpected argument to constructor `%T'", type); + else + error ("unexpected argument to constructor"); + } + init_ptr = old_init_ptr; +} + +/* Report an error if NAME is not the name of a user-defined, + aggregate type. If OR_ELSE is nonzero, give an error message. */ +int +is_aggr_typedef (name, or_else) + tree name; + int or_else; +{ + tree type; + + if (name == error_mark_node) + return 0; + + if (IDENTIFIER_HAS_TYPE_VALUE (name)) + type = IDENTIFIER_TYPE_VALUE (name); + else if (IDENTIFIER_HAS_CLASS_TYPE_VALUE (name)) + type = IDENTIFIER_CLASS_TYPE_VALUE (name); + else + { + if (or_else) + cp_error ("`%T' fails to be an aggregate typedef", name); + return 0; + } + + if (! IS_AGGR_TYPE (type) + && TREE_CODE (type) != TEMPLATE_TYPE_PARM) + { + if (or_else) + cp_error ("type `%T' is of non-aggregate type", type); + return 0; + } + return 1; +} + +/* Like is_aggr_typedef, but returns typedef if successful. */ +tree +get_aggr_from_typedef (name, or_else) + tree name; + int or_else; +{ + tree type; + + if (name == error_mark_node) + return NULL_TREE; + + if (IDENTIFIER_HAS_TYPE_VALUE (name)) + type = IDENTIFIER_TYPE_VALUE (name); + else if (IDENTIFIER_HAS_CLASS_TYPE_VALUE (name)) + type = IDENTIFIER_CLASS_TYPE_VALUE (name); + else + { + if (or_else) + cp_error ("`%T' fails to be an aggregate typedef", name); + return NULL_TREE; + } + + if (! IS_AGGR_TYPE (type) + && TREE_CODE (type) != TEMPLATE_TYPE_PARM) + { + if (or_else) + cp_error ("type `%T' is of non-aggregate type", type); + return NULL_TREE; + } + return type; +} + +tree +get_type_value (name) + tree name; +{ + tree type; + + if (name == error_mark_node) + return NULL_TREE; + + if (IDENTIFIER_HAS_TYPE_VALUE (name)) + return IDENTIFIER_TYPE_VALUE (name); + else if (IDENTIFIER_CLASS_VALUE (name)) + return IDENTIFIER_CLASS_TYPE_VALUE (name); + else + return NULL_TREE; +} + + +/* This code could just as well go in `cp-class.c', but is placed here for + modularity. */ + +/* For an expression of the form CNAME :: NAME (PARMLIST), build + the appropriate function call. */ +tree +build_member_call (cname, name, parmlist) + tree cname, name, parmlist; +{ + tree type, t; + tree method_name = name; + int dtor = 0; + int dont_use_this = 0; + tree basetype_path, decl; + + if (TREE_CODE (method_name) == BIT_NOT_EXPR) + { + method_name = TREE_OPERAND (method_name, 0); + dtor = 1; + } + + if (TREE_CODE (cname) == SCOPE_REF) + cname = resolve_scope_to_name (NULL_TREE, cname); + + if (cname == NULL_TREE || ! (type = get_aggr_from_typedef (cname, 1))) + return error_mark_node; + + /* An operator we did not like. */ + if (name == NULL_TREE) + return error_mark_node; + + if (dtor) + { +#if 0 + /* Everything can explicitly call a destructor; see 12.4 */ + if (! TYPE_HAS_DESTRUCTOR (type)) + cp_error ("type `%#T' does not have a destructor", type); + else +#endif + cp_error ("cannot call destructor `%T::~%T' without object", type, + method_name); + return error_mark_node; + } + + /* No object? Then just fake one up, and let build_method_call + figure out what to do. */ + if (current_class_type == 0 + || get_base_distance (type, current_class_type, 0, &basetype_path) == -1) + dont_use_this = 1; + + if (dont_use_this) + { + basetype_path = NULL_TREE; + decl = build1 (NOP_EXPR, TYPE_POINTER_TO (type), error_mark_node); + } + else if (current_class_decl == 0) + { + dont_use_this = 1; + decl = build1 (NOP_EXPR, TYPE_POINTER_TO (type), error_mark_node); + } + else + { + tree olddecl = current_class_decl; + tree oldtype = TREE_TYPE (TREE_TYPE (olddecl)); + if (oldtype != type) + { + tree newtype = build_type_variant (type, TYPE_READONLY (oldtype), + TYPE_VOLATILE (oldtype)); + decl = convert_force (TYPE_POINTER_TO (newtype), olddecl); + } + else + decl = olddecl; + } + + decl = build_indirect_ref (decl, NULL_PTR); + + if (t = lookup_fnfields (TYPE_BINFO (type), method_name, 0)) + return build_method_call (decl, method_name, parmlist, basetype_path, + LOOKUP_NORMAL|LOOKUP_NONVIRTUAL); + if (TREE_CODE (name) == IDENTIFIER_NODE + && (t = lookup_field (TYPE_BINFO (type), name, 1, 0))) + { + if (t == error_mark_node) + return error_mark_node; + if (TREE_CODE (t) == FIELD_DECL) + { + if (dont_use_this) + { + cp_error ("invalid use of non-static field `%D'", t); + return error_mark_node; + } + decl = build (COMPONENT_REF, TREE_TYPE (t), decl, t); + } + else if (TREE_CODE (t) == VAR_DECL) + decl = t; + else + { + cp_error ("invalid use of member `%D'", t); + return error_mark_node; + } + if (TYPE_LANG_SPECIFIC (TREE_TYPE (decl)) + && TYPE_OVERLOADS_CALL_EXPR (TREE_TYPE (decl))) + return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, decl, parmlist, NULL_TREE); + return build_function_call (decl, parmlist); + } + else + { + cp_error ("no method `%T::%D'", type, name); + return error_mark_node; + } +} + +/* Build a reference to a member of an aggregate. This is not a + C++ `&', but really something which can have its address taken, + and then act as a pointer to member, for example CNAME :: FIELD + can have its address taken by saying & CNAME :: FIELD. + + @@ Prints out lousy diagnostics for operator <typename> + @@ fields. + + @@ This function should be rewritten and placed in cp-search.c. */ +tree +build_offset_ref (cname, name) + tree cname, name; +{ + tree decl, type, fnfields, fields, t = error_mark_node; + tree basetypes = NULL_TREE; + int dtor = 0; + + if (TREE_CODE (cname) == SCOPE_REF) + cname = resolve_scope_to_name (NULL_TREE, cname); + + if (cname == NULL_TREE || ! is_aggr_typedef (cname, 1)) + return error_mark_node; + + type = IDENTIFIER_TYPE_VALUE (cname); + + if (TREE_CODE (name) == BIT_NOT_EXPR) + { + dtor = 1; + name = TREE_OPERAND (name, 0); + } + + if (TYPE_SIZE (type) == 0) + { + t = IDENTIFIER_CLASS_VALUE (name); + if (t == 0) + { + cp_error ("incomplete type `%T' does not have member `%D'", type, + name); + return error_mark_node; + } + if (TREE_CODE (t) == TYPE_DECL) + { + cp_error ("member `%D' is just a type declaration", t); + return error_mark_node; + } + if (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == CONST_DECL) + { + TREE_USED (t) = 1; + return t; + } + if (TREE_CODE (t) == FIELD_DECL) + sorry ("use of member in incomplete aggregate type"); + else if (TREE_CODE (t) == FUNCTION_DECL) + sorry ("use of member function in incomplete aggregate type"); + else + my_friendly_abort (52); + return error_mark_node; + } + + if (TREE_CODE (name) == TYPE_EXPR) + /* Pass a TYPE_DECL to build_component_type_expr. */ + return build_component_type_expr (TYPE_NAME (TREE_TYPE (cname)), + name, NULL_TREE, 1); + + fnfields = lookup_fnfields (TYPE_BINFO (type), name, 1); + fields = lookup_field (type, name, 0, 0); + + if (fields == error_mark_node || fnfields == error_mark_node) + return error_mark_node; + + if (current_class_type == 0 + || get_base_distance (type, current_class_type, 0, &basetypes) == -1) + { + basetypes = TYPE_BINFO (type); + decl = build1 (NOP_EXPR, + IDENTIFIER_TYPE_VALUE (cname), + error_mark_node); + } + else if (current_class_decl == 0) + decl = build1 (NOP_EXPR, IDENTIFIER_TYPE_VALUE (cname), + error_mark_node); + else + decl = C_C_D; + + /* A lot of this logic is now handled in lookup_field and + lookup_fnfield. */ + if (fnfields) + { + basetypes = TREE_PURPOSE (fnfields); + + /* Go from the TREE_BASELINK to the member function info. */ + t = TREE_VALUE (fnfields); + + if (fields) + { + if (DECL_FIELD_CONTEXT (fields) == DECL_FIELD_CONTEXT (t)) + { + error ("ambiguous member reference: member `%s' defined as both field and function", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + if (UNIQUELY_DERIVED_FROM_P (DECL_FIELD_CONTEXT (fields), DECL_FIELD_CONTEXT (t))) + ; + else if (UNIQUELY_DERIVED_FROM_P (DECL_FIELD_CONTEXT (t), DECL_FIELD_CONTEXT (fields))) + t = fields; + else + { + error ("ambiguous member reference: member `%s' derives from distinct classes in multiple inheritance lattice"); + return error_mark_node; + } + } + + if (t == TREE_VALUE (fnfields)) + { + extern int flag_save_memoized_contexts; + + /* This does not handle access checking yet. */ + if (DECL_CHAIN (t) == NULL_TREE || dtor) + { + enum access_type access; + + /* unique functions are handled easily. */ + unique: + access = compute_access (basetypes, t); + if (access == access_protected) + { + cp_error_at ("member function `%#D' is protected", t); + error ("in this context"); + return error_mark_node; + } + if (access == access_private) + { + cp_error_at ("member function `%#D' is private", t); + error ("in this context"); + return error_mark_node; + } + assemble_external (t); + return build (OFFSET_REF, TREE_TYPE (t), decl, t); + } + + /* overloaded functions may need more work. */ + if (cname == name) + { + if (TYPE_HAS_DESTRUCTOR (type) + && DECL_CHAIN (DECL_CHAIN (t)) == NULL_TREE) + { + t = DECL_CHAIN (t); + goto unique; + } + } + /* FNFIELDS is most likely allocated on the search_obstack, + which will go away after this class scope. If we need + to save this value for later (either for memoization + or for use as an initializer for a static variable), then + do so here. + + ??? The smart thing to do for the case of saving initializers + is to resolve them before we're done with this scope. */ + if (!TREE_PERMANENT (fnfields) + && ((flag_save_memoized_contexts && global_bindings_p ()) + || ! allocation_temporary_p ())) + fnfields = copy_list (fnfields); + t = build_tree_list (error_mark_node, fnfields); + TREE_TYPE (t) = build_offset_type (type, unknown_type_node); + return t; + } + } + + /* Now that we know we are looking for a field, see if we + have access to that field. Lookup_field will give us the + error message. */ + + t = lookup_field (basetypes, name, 1, 0); + + if (t == error_mark_node) + return error_mark_node; + + if (t == NULL_TREE) + { + cp_error ("`%D' is not a member of type `%T'", name, + IDENTIFIER_TYPE_VALUE (cname)); + return error_mark_node; + } + + if (TREE_CODE (t) == TYPE_DECL) + { + cp_error ("member `%D' is just a type declaration", t); + return error_mark_node; + } + /* static class members and class-specific enum + values can be returned without further ado. */ + if (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == CONST_DECL) + { + assemble_external (t); + TREE_USED (t) = 1; + return t; + } + + /* static class functions too. */ + if (TREE_CODE (t) == FUNCTION_DECL && TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE) + my_friendly_abort (53); + + /* In member functions, the form `cname::name' is no longer + equivalent to `this->cname::name'. */ + return build (OFFSET_REF, build_offset_type (type, TREE_TYPE (t)), decl, t); +} + +/* Given an object EXP and a member function reference MEMBER, + return the address of the actual member function. */ +tree +get_member_function (exp_addr_ptr, exp, member) + tree *exp_addr_ptr; + tree exp, member; +{ + tree ctype = TREE_TYPE (exp); + tree function = save_expr (build_unary_op (ADDR_EXPR, member, 0)); + + if (TYPE_VIRTUAL_P (ctype) + || (flag_all_virtual == 1 && TYPE_OVERLOADS_METHOD_CALL_EXPR (ctype))) + { + tree e0, e1, e3; + tree exp_addr; + + /* Save away the unadulterated `this' pointer. */ + exp_addr = save_expr (*exp_addr_ptr); + + /* Cast function to signed integer. */ + e0 = build1 (NOP_EXPR, integer_type_node, function); + +#ifdef VTABLE_USES_MASK + /* If we are willing to limit the number of + virtual functions a class may have to some + *small* number, then if, for a function address, + we are passed some small number, we know that + it is a virtual function index, and work from there. */ + e1 = build (BIT_AND_EXPR, integer_type_node, e0, vtbl_mask); +#else + /* There is a hack here that takes advantage of + twos complement arithmetic, and the fact that + there are more than one UNITS to the WORD. + If the high bit is set for the `function', + then we pretend it is a virtual function, + and the array indexing will knock this bit + out the top, leaving a valid index. */ + if (UNITS_PER_WORD <= 1) + my_friendly_abort (54); + + e1 = build (GT_EXPR, integer_type_node, e0, integer_zero_node); + e1 = build_compound_expr (tree_cons (NULL_TREE, exp_addr, + build_tree_list (NULL_TREE, e1))); + e1 = save_expr (e1); +#endif + + if (TREE_SIDE_EFFECTS (*exp_addr_ptr)) + { + exp = build_indirect_ref (exp_addr, NULL_PTR); + *exp_addr_ptr = exp_addr; + } + + /* This is really hairy: if the function pointer is a pointer + to a non-virtual member function, then we can't go mucking + with the `this' pointer (any more than we already have to + this point). If it is a pointer to a virtual member function, + then we have to adjust the `this' pointer according to + what the virtual function table tells us. */ + + e3 = build_vfn_ref (exp_addr_ptr, exp, e0); + my_friendly_assert (e3 != error_mark_node, 213); + + /* Change this pointer type from `void *' to the + type it is really supposed to be. */ + TREE_TYPE (e3) = TREE_TYPE (function); + + /* If non-virtual, use what we had originally. Otherwise, + use the value we get from the virtual function table. */ + *exp_addr_ptr = build_conditional_expr (e1, exp_addr, *exp_addr_ptr); + + function = build_conditional_expr (e1, function, e3); + } + return build_indirect_ref (function, NULL_PTR); +} + +/* If a OFFSET_REF made it through to here, then it did + not have its address taken. */ + +tree +resolve_offset_ref (exp) + tree exp; +{ + tree type = TREE_TYPE (exp); + tree base = NULL_TREE; + tree member; + tree basetype, addr; + + if (TREE_CODE (exp) == TREE_LIST) + return build_unary_op (ADDR_EXPR, exp, 0); + + if (TREE_CODE (exp) != OFFSET_REF) + { + my_friendly_assert (TREE_CODE (type) == OFFSET_TYPE, 214); + if (TYPE_OFFSET_BASETYPE (type) != current_class_type) + { + error ("object missing in use of pointer-to-member construct"); + return error_mark_node; + } + member = exp; + type = TREE_TYPE (type); + base = C_C_D; + } + else + { + member = TREE_OPERAND (exp, 1); + base = TREE_OPERAND (exp, 0); + } + + if ((TREE_CODE (member) == VAR_DECL + && ! TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) + || TREE_CODE (TREE_TYPE (member)) == FUNCTION_TYPE) + { + /* These were static members. */ + if (mark_addressable (member) == 0) + return error_mark_node; + return member; + } + + /* Syntax error can cause a member which should + have been seen as static to be grok'd as non-static. */ + if (TREE_CODE (member) == FIELD_DECL && C_C_D == NULL_TREE) + { + if (TREE_ADDRESSABLE (member) == 0) + { + cp_error_at ("member `%D' is non-static in static member function context", member); + error ("at this point in file"); + TREE_ADDRESSABLE (member) = 1; + } + return error_mark_node; + } + + /* The first case is really just a reference to a member of `this'. */ + if (TREE_CODE (member) == FIELD_DECL + && (base == C_C_D + || (TREE_CODE (base) == NOP_EXPR + && TREE_OPERAND (base, 0) == error_mark_node))) + { + tree basetype_path; + enum access_type access; + + if (TREE_CODE (exp) == OFFSET_REF && TREE_CODE (type) == OFFSET_TYPE) + { + basetype = TYPE_OFFSET_BASETYPE (type); + base = convert_pointer_to (basetype, current_class_decl); + } + else + base = current_class_decl; + basetype = DECL_CONTEXT (member); + + if (get_base_distance (basetype, TREE_TYPE (TREE_TYPE (base)), 0, &basetype_path) < 0) + { + error_not_base_type (basetype, TREE_TYPE (TREE_TYPE (base))); + return error_mark_node; + } + addr = convert_pointer_to (basetype, base); + access = compute_access (basetype_path, member); + if (access == access_public) + return build (COMPONENT_REF, TREE_TYPE (member), + build_indirect_ref (addr, NULL_PTR), member); + if (access == access_protected) + { + cp_error_at ("member `%D' is protected", member); + error ("in this context"); + return error_mark_node; + } + if (access == access_private) + { + cp_error_at ("member `%D' is private", member); + error ("in this context"); + return error_mark_node; + } + my_friendly_abort (55); + } + + /* If this is a reference to a member function, then return + the address of the member function (which may involve going + through the object's vtable), otherwise, return an expression + for the dereferenced pointer-to-member construct. */ + addr = build_unary_op (ADDR_EXPR, base, 0); + + if (TREE_CODE (TREE_TYPE (member)) == METHOD_TYPE) + { + basetype = DECL_CLASS_CONTEXT (member); + addr = convert_pointer_to (basetype, addr); + return build_unary_op (ADDR_EXPR, get_member_function (&addr, build_indirect_ref (addr, NULL_PTR), member), 0); + } + else if (TREE_CODE (TREE_TYPE (member)) == OFFSET_TYPE) + { + basetype = TYPE_OFFSET_BASETYPE (TREE_TYPE (member)); + addr = convert_pointer_to (basetype, addr); + member = convert (ptr_type_node, build_unary_op (ADDR_EXPR, member, 0)); + return build1 (INDIRECT_REF, type, + build (PLUS_EXPR, ptr_type_node, addr, member)); + } + else if (TYPE_PTRMEMFUNC_P (TREE_TYPE (member))) + { + return get_member_function_from_ptrfunc (&addr, base, member); + } + my_friendly_abort (56); + /* NOTREACHED */ + return NULL_TREE; +} + +/* Return either DECL or its known constant value (if it has one). */ + +tree +decl_constant_value (decl) + tree decl; +{ + if (! TREE_THIS_VOLATILE (decl) +#if 0 + /* These may be necessary for C, but they break C++. */ + ! TREE_PUBLIC (decl) + /* Don't change a variable array bound or initial value to a constant + in a place where a variable is invalid. */ + && ! pedantic +#endif /* 0 */ + && DECL_INITIAL (decl) != 0 + && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK + /* This is invalid if initial value is not constant. + If it has either a function call, a memory reference, + or a variable, then re-evaluating it could give different results. */ + && TREE_CONSTANT (DECL_INITIAL (decl)) + /* Check for cases where this is sub-optimal, even though valid. */ + && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR +#if 0 + /* We must allow this to work outside of functions so that + static constants can be used for array sizes. */ + && current_function_decl != 0 + && DECL_MODE (decl) != BLKmode +#endif + ) + return DECL_INITIAL (decl); + return decl; +} + +/* Friend handling routines. */ +/* Friend data structures: + + Lists of friend functions come from TYPE_DECL nodes. Since all + aggregate types are automatically typedef'd, these nodes are guaranteed + to exist. + + The TREE_PURPOSE of a friend list is the name of the friend, + and its TREE_VALUE is another list. + + For each element of that list, either the TREE_VALUE or the TREE_PURPOSE + will be filled in, but not both. The TREE_VALUE of that list is an + individual function which is a friend. The TREE_PURPOSE of that list + indicates a type in which all functions by that name are friends. + + Lists of friend classes come from _TYPE nodes. Love that consistency + thang. */ + +int +is_friend_type (type1, type2) + tree type1, type2; +{ + return is_friend (type1, type2); +} + +int +is_friend (type, supplicant) + tree type, supplicant; +{ + int declp; + register tree list; + + if (supplicant == NULL_TREE || type == NULL_TREE) + return 0; + + declp = (TREE_CODE_CLASS (TREE_CODE (supplicant)) == 'd'); + + if (declp) + /* It's a function decl. */ + { + tree list = DECL_FRIENDLIST (TYPE_NAME (type)); + tree name = DECL_NAME (supplicant); + tree ctype = DECL_CLASS_CONTEXT (supplicant); + for (; list ; list = TREE_CHAIN (list)) + { + if (name == TREE_PURPOSE (list)) + { + tree friends = TREE_VALUE (list); + name = DECL_ASSEMBLER_NAME (supplicant); + for (; friends ; friends = TREE_CHAIN (friends)) + { + if (ctype == TREE_PURPOSE (friends)) + return 1; + if (name == DECL_ASSEMBLER_NAME (TREE_VALUE (friends))) + return 1; + } + break; + } + } + } + else + /* It's a type. */ + { + if (type == supplicant) + return 1; + + list = CLASSTYPE_FRIEND_CLASSES (TREE_TYPE (TYPE_NAME (type))); + for (; list ; list = TREE_CHAIN (list)) + if (supplicant == TREE_VALUE (list)) + return 1; + } + + { + tree context = declp ? DECL_CLASS_CONTEXT (supplicant) + : DECL_CONTEXT (TYPE_NAME (supplicant)); + + if (context) + return is_friend (type, context); + } + + return 0; +} + +/* Add a new friend to the friends of the aggregate type TYPE. + DECL is the FUNCTION_DECL of the friend being added. */ +static void +add_friend (type, decl) + tree type, decl; +{ + tree typedecl = TYPE_NAME (type); + tree list = DECL_FRIENDLIST (typedecl); + tree name = DECL_NAME (decl); + + while (list) + { + if (name == TREE_PURPOSE (list)) + { + tree friends = TREE_VALUE (list); + for (; friends ; friends = TREE_CHAIN (friends)) + { + if (decl == TREE_VALUE (friends)) + { + cp_pedwarn_at ("`%D' is already a friend of class `%T'", + decl, type); + return; + } + } + TREE_VALUE (list) = tree_cons (error_mark_node, decl, + TREE_VALUE (list)); + return; + } + list = TREE_CHAIN (list); + } + DECL_FRIENDLIST (typedecl) + = tree_cons (DECL_NAME (decl), build_tree_list (error_mark_node, decl), + DECL_FRIENDLIST (typedecl)); + if (DECL_NAME (decl) == ansi_opname[(int) MODIFY_EXPR]) + { + tree parmtypes = TYPE_ARG_TYPES (TREE_TYPE (decl)); + TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; + if (parmtypes && TREE_CHAIN (parmtypes)) + { + tree parmtype = TREE_VALUE (TREE_CHAIN (parmtypes)); + if (TREE_CODE (parmtype) == REFERENCE_TYPE + && TREE_TYPE (parmtypes) == TREE_TYPE (typedecl)) + TYPE_HAS_ASSIGN_REF (TREE_TYPE (typedecl)) = 1; + } + } +} + +/* Declare that every member function NAME in FRIEND_TYPE + (which may be NULL_TREE) is a friend of type TYPE. */ +static void +add_friends (type, name, friend_type) + tree type, name, friend_type; +{ + tree typedecl = TYPE_NAME (type); + tree list = DECL_FRIENDLIST (typedecl); + + while (list) + { + if (name == TREE_PURPOSE (list)) + { + tree friends = TREE_VALUE (list); + while (friends && TREE_PURPOSE (friends) != friend_type) + friends = TREE_CHAIN (friends); + if (friends) + if (friend_type) + warning ("method `%s::%s' is already a friend of class", + TYPE_NAME_STRING (friend_type), + IDENTIFIER_POINTER (name)); + else + warning ("function `%s' is already a friend of class `%s'", + IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (DECL_NAME (typedecl))); + else + TREE_VALUE (list) = tree_cons (friend_type, NULL_TREE, + TREE_VALUE (list)); + return; + } + list = TREE_CHAIN (list); + } + DECL_FRIENDLIST (typedecl) = + tree_cons (name, + build_tree_list (friend_type, NULL_TREE), + DECL_FRIENDLIST (typedecl)); + if (! strncmp (IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR]), + strlen (IDENTIFIER_POINTER (ansi_opname[(int) MODIFY_EXPR])))) + { + TYPE_HAS_ASSIGNMENT (TREE_TYPE (typedecl)) = 1; + sorry ("declaring \"friend operator =\" will not find \"operator = (X&)\" if it exists"); + } +} + +/* Set up a cross reference so that type TYPE will make member function + CTYPE::DECL a friend when CTYPE is finally defined. For more than + one, set up a cross reference so that functions with the name DECL + and type CTYPE know that they are friends of TYPE. */ +static void +xref_friend (type, decl, ctype) + tree type, decl, ctype; +{ + tree typedecl = TYPE_NAME (type); + tree friend_decl = TYPE_NAME (ctype); +#if 0 + tree t = tree_cons (NULL_TREE, ctype, DECL_UNDEFINED_FRIENDS (typedecl)); + + DECL_UNDEFINED_FRIENDS (typedecl) = t; +#else + tree t = 0; +#endif + SET_DECL_WAITING_FRIENDS (friend_decl, + tree_cons (type, t, + DECL_WAITING_FRIENDS (friend_decl))); + TREE_TYPE (DECL_WAITING_FRIENDS (friend_decl)) = decl; +} + +/* Make FRIEND_TYPE a friend class to TYPE. If FRIEND_TYPE has already + been defined, we make all of its member functions friends of + TYPE. If not, we make it a pending friend, which can later be added + when its definition is seen. If a type is defined, then its TYPE_DECL's + DECL_UNDEFINED_FRIENDS contains a (possibly empty) list of friend + classes that are not defined. If a type has not yet been defined, + then the DECL_WAITING_FRIENDS contains a list of types + waiting to make it their friend. Note that these two can both + be in use at the same time! */ +void +make_friend_class (type, friend_type) + tree type, friend_type; +{ + tree classes; + + if (IS_SIGNATURE (type)) + { + error ("`friend' declaration in signature definition"); + return; + } + if (IS_SIGNATURE (friend_type)) + { + error ("signature type `%s' declared `friend'", + IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (friend_type)))); + return; + } + if (type == friend_type) + { + warning ("class `%s' is implicitly friends with itself", + TYPE_NAME_STRING (type)); + return; + } + + GNU_xref_hier (TYPE_NAME_STRING (type), + TYPE_NAME_STRING (friend_type), 0, 0, 1); + + classes = CLASSTYPE_FRIEND_CLASSES (type); + while (classes && TREE_VALUE (classes) != friend_type) + classes = TREE_CHAIN (classes); + if (classes) + warning ("class `%s' is already friends with class `%s'", + TYPE_NAME_STRING (TREE_VALUE (classes)), TYPE_NAME_STRING (type)); + else + { + CLASSTYPE_FRIEND_CLASSES (type) + = tree_cons (NULL_TREE, friend_type, CLASSTYPE_FRIEND_CLASSES (type)); + } +} + +/* Main friend processor. This is large, and for modularity purposes, + has been removed from grokdeclarator. It returns `void_type_node' + to indicate that something happened, though a FIELD_DECL is + not returned. + + CTYPE is the class this friend belongs to. + + DECLARATOR is the name of the friend. + + DECL is the FUNCTION_DECL that the friend is. + + In case we are parsing a friend which is part of an inline + definition, we will need to store PARM_DECL chain that comes + with it into the DECL_ARGUMENTS slot of the FUNCTION_DECL. + + FLAGS is just used for `grokclassfn'. + + QUALS say what special qualifies should apply to the object + pointed to by `this'. */ +tree +do_friend (ctype, declarator, decl, parmdecls, flags, quals) + tree ctype, declarator, decl, parmdecls; + enum overload_flags flags; + tree quals; +{ + /* first, lets find out if what we are making a friend needs overloading */ + tree previous_decl; + int was_c_linkage = 0; + + /* Every decl that gets here is a friend of something. */ + DECL_FRIEND_P (decl) = 1; + + /* If we find something in scope, let see if it has extern "C" linkage. */ + /* This code is pretty general and should be ripped out and reused + as a separate function. */ + if (DECL_NAME (decl)) + { + previous_decl = lookup_name (DECL_NAME (decl), 0); + if (previous_decl && TREE_CODE (previous_decl) == TREE_LIST) + { + do + { + if (TREE_TYPE (TREE_VALUE (previous_decl)) == TREE_TYPE (decl)) + { + previous_decl = TREE_VALUE (previous_decl); + break; + } + previous_decl = TREE_CHAIN (previous_decl); + } + while (previous_decl); + } + + /* It had extern "C" linkage, so don't overload this. */ + if (previous_decl && TREE_CODE (previous_decl) == FUNCTION_DECL + && TREE_TYPE (decl) == TREE_TYPE (previous_decl) + && DECL_LANGUAGE (previous_decl) == lang_c) + was_c_linkage = 1; + } + + if (ctype) + { + tree cname = TYPE_NAME (ctype); + if (TREE_CODE (cname) == TYPE_DECL) + cname = DECL_NAME (cname); + + /* A method friend. */ + if (TREE_CODE (decl) == FUNCTION_DECL) + { + if (flags == NO_SPECIAL && ctype && declarator == cname) + DECL_CONSTRUCTOR_P (decl) = 1; + + /* This will set up DECL_ARGUMENTS for us. */ + grokclassfn (ctype, cname, decl, flags, quals); + if (TYPE_SIZE (ctype) != 0) + check_classfn (ctype, cname, decl); + + if (TREE_TYPE (decl) != error_mark_node) + { + if (TYPE_SIZE (ctype)) + { + /* We don't call pushdecl here yet, or ever on this + actual FUNCTION_DECL. We must preserve its TREE_CHAIN + until the end. */ + make_decl_rtl (decl, NULL_PTR, 1); + add_friend (current_class_type, decl); + } + else + { + register char *classname + = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (ctype))); + + error ("member declared as friend before type `%s' defined", + classname); + } + } + } + else + { + /* Possibly a bunch of method friends. */ + + /* Get the class they belong to. */ + tree ctype = IDENTIFIER_TYPE_VALUE (cname); + + /* This class is defined, use its methods now. */ + if (TYPE_SIZE (ctype)) + { + tree fields = lookup_fnfields (TYPE_BINFO (ctype), declarator, 0); + if (fields) + add_friends (current_class_type, declarator, ctype); + else + error ("method `%s' is not a member of class `%s'", + IDENTIFIER_POINTER (declarator), + IDENTIFIER_POINTER (cname)); + } + else + /* Note: DECLARATOR actually has more than one; in this + case, we're making sure that fns with the name DECLARATOR + and type CTYPE know they are friends of the current + class type. */ + xref_friend (current_class_type, declarator, ctype); + decl = void_type_node; + } + } + /* never overload C functions */ + else if (TREE_CODE (decl) == FUNCTION_DECL + && ((IDENTIFIER_LENGTH (declarator) == 4 + && IDENTIFIER_POINTER (declarator)[0] == 'm' + && ! strcmp (IDENTIFIER_POINTER (declarator), "main")) + || (IDENTIFIER_LENGTH (declarator) > 10 + && IDENTIFIER_POINTER (declarator)[0] == '_' + && IDENTIFIER_POINTER (declarator)[1] == '_' + && strncmp (IDENTIFIER_POINTER (declarator)+2, + "builtin_", 8) == 0) + || was_c_linkage)) + { + /* raw "main", and builtin functions never gets overloaded, + but they can become friends. */ + TREE_PUBLIC (decl) = 1; + add_friend (current_class_type, decl); + DECL_FRIEND_P (decl) = 1; + if (IDENTIFIER_POINTER (declarator)[0] == '_') + { + if (! strcmp (IDENTIFIER_POINTER (declarator)+10, "new")) + TREE_GETS_NEW (current_class_type) = 0; + else if (! strcmp (IDENTIFIER_POINTER (declarator)+10, "delete")) + TREE_GETS_DELETE (current_class_type) = 0; + } + decl = void_type_node; + } + /* A global friend. + @@ or possibly a friend from a base class ?!? */ + else if (TREE_CODE (decl) == FUNCTION_DECL) + { + /* Friends must all go through the overload machinery, + even though they may not technically be overloaded. + + Note that because classes all wind up being top-level + in their scope, their friend wind up in top-level scope as well. */ + DECL_ASSEMBLER_NAME (decl) + = build_decl_overload (declarator, TYPE_ARG_TYPES (TREE_TYPE (decl)), + TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE); + DECL_ARGUMENTS (decl) = parmdecls; + DECL_CLASS_CONTEXT (decl) = current_class_type; + + /* We can call pushdecl here, because the TREE_CHAIN of this + FUNCTION_DECL is not needed for other purposes. */ + decl = pushdecl_top_level (decl); + + make_decl_rtl (decl, NULL_PTR, 1); + add_friend (current_class_type, decl); + + if (! TREE_OVERLOADED (declarator) + && IDENTIFIER_GLOBAL_VALUE (declarator) + && TREE_CODE (IDENTIFIER_GLOBAL_VALUE (declarator)) == FUNCTION_DECL) + { + error ("friend `%s' implicitly overloaded", + IDENTIFIER_POINTER (declarator)); + cp_error_at ("after declaration of non-overloaded `%D'", IDENTIFIER_GLOBAL_VALUE (declarator)); + } + DECL_FRIEND_P (decl) = 1; + DECL_OVERLOADED (decl) = 1; + TREE_OVERLOADED (declarator) = 1; + decl = push_overloaded_decl (decl, 1); + } + else + { + /* @@ Should be able to ingest later definitions of this function + before use. */ + tree decl = IDENTIFIER_GLOBAL_VALUE (declarator); + if (decl == NULL_TREE) + { + warning ("implicitly declaring `%s' as struct", + IDENTIFIER_POINTER (declarator)); + decl = xref_tag (record_type_node, declarator, NULL_TREE, 1); + decl = TYPE_NAME (decl); + } + + /* Allow abbreviated declarations of overloaded functions, + but not if those functions are really class names. */ + if (TREE_CODE (decl) == TREE_LIST && TREE_TYPE (TREE_PURPOSE (decl))) + { + warning ("`friend %s' archaic, use `friend class %s' instead", + IDENTIFIER_POINTER (declarator), + IDENTIFIER_POINTER (declarator)); + decl = TREE_TYPE (TREE_PURPOSE (decl)); + } + + if (TREE_CODE (decl) == TREE_LIST) + add_friends (current_class_type, TREE_PURPOSE (decl), NULL_TREE); + else + make_friend_class (current_class_type, TREE_TYPE (decl)); + decl = void_type_node; + } + return decl; +} + +/* TYPE has now been defined. It may, however, have a number of things + waiting make make it their friend. We resolve these references + here. */ +void +embrace_waiting_friends (type) + tree type; +{ + tree decl = TYPE_NAME (type); + tree waiters; + + if (TREE_CODE (decl) != TYPE_DECL) + return; + + for (waiters = DECL_WAITING_FRIENDS (decl); waiters; + waiters = TREE_CHAIN (waiters)) + { + tree waiter = TREE_PURPOSE (waiters); +#if 0 + tree waiter_prev = TREE_VALUE (waiters); +#endif + tree decl = TREE_TYPE (waiters); + tree name = decl ? (TREE_CODE (decl) == IDENTIFIER_NODE + ? decl : DECL_NAME (decl)) : NULL_TREE; + if (name) + { + /* @@ There may be work to be done since we have not verified + @@ consistency between original and friend declarations + @@ of the functions waiting to become friends. */ + tree field = lookup_fnfields (TYPE_BINFO (type), name, 0); + if (field) + if (decl == name) + add_friends (waiter, name, type); + else + add_friend (waiter, decl); + else + error_with_file_and_line (DECL_SOURCE_FILE (TYPE_NAME (waiter)), + DECL_SOURCE_LINE (TYPE_NAME (waiter)), + "no method `%s' defined in class `%s' to be friend", + IDENTIFIER_POINTER (DECL_NAME (TREE_TYPE (waiters))), + TYPE_NAME_STRING (type)); + } + else + make_friend_class (type, waiter); + +#if 0 + if (TREE_CHAIN (waiter_prev)) + TREE_CHAIN (waiter_prev) = TREE_CHAIN (TREE_CHAIN (waiter_prev)); + else + DECL_UNDEFINED_FRIENDS (TYPE_NAME (waiter)) = NULL_TREE; +#endif + } +} + +/* Common subroutines of build_new and build_vec_delete. */ + +/* Common interface for calling "builtin" functions that are not + really builtin. */ + +tree +build_builtin_call (type, node, arglist) + tree type; + tree node; + tree arglist; +{ + tree rval = build (CALL_EXPR, type, node, arglist, 0); + TREE_SIDE_EFFECTS (rval) = 1; + assemble_external (TREE_OPERAND (node, 0)); + TREE_USED (TREE_OPERAND (node, 0)) = 1; + return rval; +} + +/* Generate a C++ "new" expression. DECL is either a TREE_LIST + (which needs to go through some sort of groktypename) or it + is the name of the class we are newing. INIT is an initialization value. + It is either an EXPRLIST, an EXPR_NO_COMMAS, or something in braces. + If INIT is void_type_node, it means do *not* call a constructor + for this instance. + + For types with constructors, the data returned is initialized + by the appropriate constructor. + + Whether the type has a constructor or not, if it has a pointer + to a virtual function table, then that pointer is set up + here. + + Unless I am mistaken, a call to new () will return initialized + data regardless of whether the constructor itself is private or + not. + + Note that build_new does nothing to assure that any special + alignment requirements of the type are met. Rather, it leaves + it up to malloc to do the right thing. Otherwise, folding to + the right alignment cal cause problems if the user tries to later + free the memory returned by `new'. + + PLACEMENT is the `placement' list for user-defined operator new (). */ + +tree +build_new (placement, decl, init, use_global_new) + tree placement; + tree decl, init; + int use_global_new; +{ + tree type, true_type, size, rval; + tree init1 = NULL_TREE, nelts; + int has_call = 0, has_array = 0; + + tree pending_sizes = NULL_TREE; + + if (decl == error_mark_node) + return error_mark_node; + + if (TREE_CODE (decl) == TREE_LIST) + { + tree absdcl = TREE_VALUE (decl); + tree last_absdcl = NULL_TREE; + int old_immediate_size_expand; + + if (current_function_decl + && DECL_CONSTRUCTOR_P (current_function_decl)) + { + old_immediate_size_expand = immediate_size_expand; + immediate_size_expand = 0; + } + + nelts = integer_one_node; + + if (absdcl && TREE_CODE (absdcl) == CALL_EXPR) + { + /* probably meant to be a call */ + has_call = 1; + init1 = TREE_OPERAND (absdcl, 1); + absdcl = TREE_OPERAND (absdcl, 0); + TREE_VALUE (decl) = absdcl; + } + while (absdcl && TREE_CODE (absdcl) == INDIRECT_REF) + { + last_absdcl = absdcl; + absdcl = TREE_OPERAND (absdcl, 0); + } + + if (absdcl && TREE_CODE (absdcl) == ARRAY_REF) + { + /* probably meant to be a vec new */ + tree this_nelts; + + has_array = 1; + this_nelts = TREE_OPERAND (absdcl, 1); + if (this_nelts != error_mark_node) + { + if (this_nelts == NULL_TREE) + error ("new of array type fails to specify size"); + else + { + this_nelts = save_expr (this_nelts); + absdcl = TREE_OPERAND (absdcl, 0); + if (this_nelts == integer_zero_node) + { + warning ("zero size array reserves no space"); + nelts = integer_zero_node; + } + else + nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); + } + } + else + nelts = integer_zero_node; + } + + if (last_absdcl) + TREE_OPERAND (last_absdcl, 0) = absdcl; + else + TREE_VALUE (decl) = absdcl; + + type = true_type = groktypename (decl); + if (! type || type == error_mark_node + || true_type == error_mark_node) + { + immediate_size_expand = old_immediate_size_expand; + return error_mark_node; + } + + /* ``A reference cannot be created by the new operator. A reference + is not an object (8.2.2, 8.4.3), so a pointer to it could not be + returned by new.'' ARM 5.3.3 */ + if (TREE_CODE (type) == REFERENCE_TYPE) + error ("new cannot be applied to a reference type"); + + type = TYPE_MAIN_VARIANT (type); + if (type == void_type_node) + { + error ("invalid type: `void []'"); + return error_mark_node; + } + if (current_function_decl + && DECL_CONSTRUCTOR_P (current_function_decl)) + { + pending_sizes = get_pending_sizes (); + immediate_size_expand = old_immediate_size_expand; + } + } + else if (TREE_CODE (decl) == IDENTIFIER_NODE) + { + if (IDENTIFIER_HAS_TYPE_VALUE (decl)) + { + /* An aggregate type. */ + type = IDENTIFIER_TYPE_VALUE (decl); + decl = TYPE_NAME (type); + } + else + { + /* A builtin type. */ + decl = lookup_name (decl, 1); + my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 215); + type = TREE_TYPE (decl); + } + true_type = type; + } + else if (TREE_CODE (decl) == TYPE_DECL) + { + type = TREE_TYPE (decl); + true_type = type; + } + else + { + type = decl; + true_type = type; + decl = TYPE_NAME (type); + } + + if (TYPE_SIZE (type) == 0) + { + if (type == void_type_node) + error ("invalid type for new: `void'"); + else + incomplete_type_error (0, type); + return error_mark_node; + } + + if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_ABSTRACT_VIRTUALS (type)) + { + abstract_virtuals_error (NULL_TREE, type); + return error_mark_node; + } + + if (TYPE_LANG_SPECIFIC (type) && IS_SIGNATURE (type)) + { + signature_error (NULL_TREE, type); + return error_mark_node; + } + + /* If our base type is an array, then make sure we know how many elements + it has. */ + while (TREE_CODE (true_type) == ARRAY_TYPE) + { + tree this_nelts = array_type_nelts_top (true_type); + if (nelts == integer_one_node) + { + has_array = 1; + nelts = this_nelts; + } + else + { + my_friendly_assert (has_array != 0, 216); + nelts = build_binary_op (MULT_EXPR, nelts, this_nelts, 1); + } + true_type = TREE_TYPE (true_type); + } + if (has_array) + size = fold (build_binary_op (MULT_EXPR, size_in_bytes (true_type), + nelts, 1)); + else + size = size_in_bytes (type); + + if (has_call) + init = init1; + + /* Get a little extra space to store a couple of things before the new'ed + array. */ + if (has_array && TYPE_NEEDS_DESTRUCTOR (true_type)) + { + tree extra = BI_header_size; + + size = size_binop (PLUS_EXPR, size, extra); + } + + /* Allocate the object. */ + if (TYPE_LANG_SPECIFIC (true_type) + && (TREE_GETS_NEW (true_type) || TREE_GETS_PLACED_NEW (true_type)) + && !use_global_new) + rval = build_opfncall (NEW_EXPR, LOOKUP_NORMAL, + TYPE_POINTER_TO (true_type), size, placement); + else if (placement) + { + rval = build_opfncall (NEW_EXPR, LOOKUP_GLOBAL|LOOKUP_COMPLAIN, + ptr_type_node, size, placement); + rval = convert (TYPE_POINTER_TO (true_type), rval); + } + else if (flag_this_is_variable > 0 + && TYPE_HAS_CONSTRUCTOR (true_type) && init != void_type_node) + { + if (init == NULL_TREE || TREE_CODE (init) == TREE_LIST) + rval = NULL_TREE; + else + { + error ("constructors take parameter lists"); + return error_mark_node; + } + } + else + { + rval = build_builtin_call (build_pointer_type (true_type), + BIN, build_tree_list (NULL_TREE, size)); +#if 0 + /* See comment above as to why this is disabled. */ + if (alignment) + { + rval = build (PLUS_EXPR, TYPE_POINTER_TO (true_type), rval, + alignment); + rval = build (BIT_AND_EXPR, TYPE_POINTER_TO (true_type), + rval, build1 (BIT_NOT_EXPR, integer_type_node, + alignment)); + } +#endif + TREE_CALLS_NEW (rval) = 1; + TREE_SIDE_EFFECTS (rval) = 1; + } + + /* if rval is NULL_TREE I don't have to allocate it, but are we totally + sure we have some extra bytes in that case for the BI_header_size + cookies? And how does that interact with the code below? (mrs) */ + /* Finish up some magic for new'ed arrays */ + if (has_array && TYPE_NEEDS_DESTRUCTOR (true_type) && rval != NULL_TREE) + { + tree extra = BI_header_size; + tree cookie, exp1; + rval = convert (ptr_type_node, rval); /* convert to void * first */ + rval = convert (string_type_node, rval); /* lets not add void* and ints */ + rval = save_expr (build_binary_op (PLUS_EXPR, rval, extra, 1)); + /* Store header info. */ + cookie = build_indirect_ref (build (MINUS_EXPR, TYPE_POINTER_TO (BI_header_type), + rval, extra), NULL_PTR); + exp1 = build (MODIFY_EXPR, void_type_node, + build_component_ref (cookie, nc_nelts_field_id, 0, 0), + nelts); + TREE_SIDE_EFFECTS (exp1) = 1; + rval = convert (build_pointer_type (true_type), rval); + TREE_CALLS_NEW (rval) = 1; + TREE_SIDE_EFFECTS (rval) = 1; + rval = build_compound_expr (tree_cons (NULL_TREE, exp1, + build_tree_list (NULL_TREE, rval))); + } + + /* We've figured out where the allocation is to go. + If we're not eliding constructors, then if a constructor + is defined, we must go through it. */ + if (!has_array && (rval == NULL_TREE || !flag_elide_constructors) + && TYPE_HAS_CONSTRUCTOR (true_type) && init != void_type_node) + { + tree newrval; + /* Constructors are never virtual. If it has an initialization, we + need to complain if we aren't allowed to use the ctor that took + that argument. */ + int flags = LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_COMPLAIN; + + /* If a copy constructor might work, set things up so that we can + try that after this. We deliberately don't clear LOOKUP_COMPLAIN + any more, since that would make it impossible to rationally use + the access of a constructor that matches perfectly. */ +#if 0 + if (rval != NULL_TREE) + flags |= LOOKUP_SPECULATIVELY; +#endif + + if (rval && TYPE_USES_VIRTUAL_BASECLASSES (true_type)) + { + init = tree_cons (NULL_TREE, integer_one_node, init); + flags |= LOOKUP_HAS_IN_CHARGE; + } + + { + tree tmp = rval; + + if (TREE_CODE (TREE_TYPE (tmp)) == POINTER_TYPE) + tmp = build_indirect_ref (tmp, NULL_PTR); + + newrval = build_method_call (tmp, constructor_name_full (true_type), + init, NULL_TREE, flags); + } + + if (newrval) + { + rval = newrval; + TREE_HAS_CONSTRUCTOR (rval) = 1; + } + else + rval = error_mark_node; + goto done; + } + + if (rval == error_mark_node) + return error_mark_node; + rval = save_expr (rval); + TREE_HAS_CONSTRUCTOR (rval) = 1; + + /* Don't call any constructors or do any initialization. */ + if (init == void_type_node) + goto done; + + if (TYPE_NEEDS_CONSTRUCTING (type) + || (has_call || init)) + { + if (! TYPE_NEEDS_CONSTRUCTING (type) && ! IS_AGGR_TYPE (type)) + { + /* New 2.0 interpretation: `new int (10)' means + allocate an int, and initialize it with 10. */ + + init = build_c_cast (type, init); + rval = build (COMPOUND_EXPR, TREE_TYPE (rval), + build_modify_expr (build_indirect_ref (rval, NULL_PTR), + NOP_EXPR, init), + rval); + TREE_SIDE_EFFECTS (rval) = 1; + TREE_CALLS_NEW (rval) = 1; + } + else if (current_function_decl == NULL_TREE) + { + extern tree static_aggregates; + + /* In case of static initialization, SAVE_EXPR is good enough. */ + init = copy_to_permanent (init); + rval = copy_to_permanent (rval); + static_aggregates = perm_tree_cons (init, rval, static_aggregates); + } + else + { + /* Have to wrap this in RTL_EXPR for two cases: + in base or member initialization and if we + are a branch of a ?: operator. Since we + can't easily know the latter, just do it always. */ + tree xval = make_node (RTL_EXPR); + + TREE_TYPE (xval) = TREE_TYPE (rval); + do_pending_stack_adjust (); + start_sequence_for_rtl_expr (xval); + + /* As a matter of principle, `start_sequence' should do this. */ + emit_note (0, -1); + + if (has_array) + rval = expand_vec_init (decl, rval, + build_binary_op (MINUS_EXPR, nelts, integer_one_node, 1), + init, 0); + else + expand_aggr_init (build_indirect_ref (rval, NULL_PTR), init, 0); + + do_pending_stack_adjust (); + + TREE_SIDE_EFFECTS (xval) = 1; + TREE_CALLS_NEW (xval) = 1; + RTL_EXPR_SEQUENCE (xval) = get_insns (); + end_sequence (); + + if (TREE_CODE (rval) == SAVE_EXPR) + { + /* Errors may cause this to not get evaluated. */ + if (SAVE_EXPR_RTL (rval) == 0) + SAVE_EXPR_RTL (rval) = const0_rtx; + RTL_EXPR_RTL (xval) = SAVE_EXPR_RTL (rval); + } + else + { + my_friendly_assert (TREE_CODE (rval) == VAR_DECL, 217); + RTL_EXPR_RTL (xval) = DECL_RTL (rval); + } + rval = xval; + } + } + done: + if (pending_sizes) + rval = build_compound_expr (chainon (pending_sizes, + build_tree_list (NULL_TREE, rval))); + + if (flag_gc) + { + extern tree gc_visible; + tree objbits; + tree update_expr; + + rval = save_expr (rval); + /* We don't need a `headof' operation to do this because + we know where the object starts. */ + objbits = build1 (INDIRECT_REF, unsigned_type_node, + build (MINUS_EXPR, ptr_type_node, + rval, c_sizeof_nowarn (unsigned_type_node))); + update_expr = build_modify_expr (objbits, BIT_IOR_EXPR, gc_visible); + rval = build_compound_expr (tree_cons (NULL_TREE, rval, + tree_cons (NULL_TREE, update_expr, + build_tree_list (NULL_TREE, rval)))); + } + + return save_expr (rval); +} + +/* `expand_vec_init' performs initialization of a vector of aggregate + types. + + DECL is passed only for error reporting, and provides line number + and source file name information. + BASE is the space where the vector will be. + MAXINDEX is the maximum index of the array (one less than the + number of elements). + INIT is the (possibly NULL) initializer. + + FROM_ARRAY is 0 if we should init everything with INIT + (i.e., every element initialized from INIT). + FROM_ARRAY is 1 if we should index into INIT in parallel + with initialization of DECL. + FROM_ARRAY is 2 if we should index into INIT in parallel, + but use assignment instead of initialization. */ + +tree +expand_vec_init (decl, base, maxindex, init, from_array) + tree decl, base, maxindex, init; + int from_array; +{ + tree rval; + tree iterator, base2 = NULL_TREE; + tree type = TREE_TYPE (TREE_TYPE (base)); + tree size; + + maxindex = convert (integer_type_node, maxindex); + if (maxindex == error_mark_node) + return error_mark_node; + + if (current_function_decl == NULL_TREE) + { + rval = make_tree_vec (3); + TREE_VEC_ELT (rval, 0) = base; + TREE_VEC_ELT (rval, 1) = maxindex; + TREE_VEC_ELT (rval, 2) = init; + return rval; + } + + size = size_in_bytes (type); + + /* Set to zero in case size is <= 0. Optimizer will delete this if + it is not needed. */ + rval = get_temp_regvar (TYPE_POINTER_TO (type), + convert (TYPE_POINTER_TO (type), null_pointer_node)); + base = default_conversion (base); + base = convert (TYPE_POINTER_TO (type), base); + expand_assignment (rval, base, 0, 0); + base = get_temp_regvar (TYPE_POINTER_TO (type), base); + + if (init != NULL_TREE + && TREE_CODE (init) == CONSTRUCTOR + && TREE_TYPE (init) == TREE_TYPE (decl)) + { + /* Initialization of array from {...}. */ + tree elts = CONSTRUCTOR_ELTS (init); + tree baseref = build1 (INDIRECT_REF, type, base); + tree baseinc = build (PLUS_EXPR, TYPE_POINTER_TO (type), base, size); + int host_i = TREE_INT_CST_LOW (maxindex); + + if (IS_AGGR_TYPE (type)) + { + while (elts) + { + host_i -= 1; + expand_aggr_init (baseref, TREE_VALUE (elts), 0); + + expand_assignment (base, baseinc, 0, 0); + elts = TREE_CHAIN (elts); + } + /* Initialize any elements by default if possible. */ + if (host_i >= 0) + { + if (TYPE_NEEDS_CONSTRUCTING (type) == 0) + { + if (obey_regdecls) + use_variable (DECL_RTL (base)); + goto done_init; + } + + iterator = get_temp_regvar (integer_type_node, + build_int_2 (host_i, 0)); + init = NULL_TREE; + goto init_by_default; + } + } + else + while (elts) + { + expand_assignment (baseref, TREE_VALUE (elts), 0, 0); + + expand_assignment (base, baseinc, 0, 0); + elts = TREE_CHAIN (elts); + } + + if (obey_regdecls) + use_variable (DECL_RTL (base)); + } + else + { + tree itype; + + iterator = get_temp_regvar (integer_type_node, maxindex); + + init_by_default: + + /* If initializing one array from another, + initialize element by element. */ + if (from_array) + { + /* We rely upon the below calls the do argument checking */ + if (decl == NULL_TREE) + { + sorry ("initialization of array from dissimilar array type"); + return error_mark_node; + } + if (init) + { + base2 = default_conversion (init); + itype = TREE_TYPE (base2); + base2 = get_temp_regvar (itype, base2); + itype = TREE_TYPE (itype); + } + else if (TYPE_LANG_SPECIFIC (type) + && TYPE_NEEDS_CONSTRUCTING (type) + && ! TYPE_HAS_DEFAULT_CONSTRUCTOR (type)) + { + error ("initializer ends prematurely"); + return error_mark_node; + } + } + + expand_start_cond (build (GE_EXPR, integer_type_node, + iterator, integer_zero_node), 0); + expand_start_loop_continue_elsewhere (1); + + if (from_array) + { + tree to = build1 (INDIRECT_REF, type, base); + tree from; + + if (base2) + from = build1 (INDIRECT_REF, itype, base2); + else + from = NULL_TREE; + + if (from_array == 2) + expand_expr_stmt (build_modify_expr (to, NOP_EXPR, from)); + else if (TYPE_NEEDS_CONSTRUCTING (type)) + expand_aggr_init (to, from, 0); + else if (from) + expand_assignment (to, from, 0, 0); + else + my_friendly_abort (57); + } + else if (TREE_CODE (type) == ARRAY_TYPE) + { + if (init != 0) + sorry ("cannot initialize multi-dimensional array with initializer"); + expand_vec_init (decl, build1 (NOP_EXPR, TYPE_POINTER_TO (TREE_TYPE (type)), base), + array_type_nelts (type), 0, 0); + } + else + expand_aggr_init (build1 (INDIRECT_REF, type, base), init, 0); + + expand_assignment (base, + build (PLUS_EXPR, TYPE_POINTER_TO (type), base, size), + 0, 0); + if (base2) + expand_assignment (base2, + build (PLUS_EXPR, TYPE_POINTER_TO (type), base2, size), 0, 0); + expand_loop_continue_here (); + expand_exit_loop_if_false (0, build (NE_EXPR, integer_type_node, + build (PREDECREMENT_EXPR, integer_type_node, iterator, integer_one_node), minus_one)); + + if (obey_regdecls) + { + use_variable (DECL_RTL (base)); + if (base2) + use_variable (DECL_RTL (base2)); + } + expand_end_loop (); + expand_end_cond (); + if (obey_regdecls) + use_variable (DECL_RTL (iterator)); + } + done_init: + + if (obey_regdecls) + use_variable (DECL_RTL (rval)); + return rval; +} + +/* Free up storage of type TYPE, at address ADDR. + + TYPE is a POINTER_TYPE and can be ptr_type_node for no special type + of pointer. + + VIRTUAL_SIZE is the amount of storage that was allocated, and is + used as the second argument to operator delete. It can include + things like padding and magic size cookies. It has virtual in it, + because if you have a base pointer and you delete through a virtual + destructor, it should be the size of the dynamic object, not the + static object, see Free Store 12.5 ANSI C++ WP. + + This does not call any destructors. */ +tree +build_x_delete (type, addr, use_global_delete, virtual_size) + tree type, addr; + int use_global_delete; + tree virtual_size; +{ + tree rval; + + if (!use_global_delete + && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) + && TREE_GETS_DELETE (TREE_TYPE (type))) + rval = build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, + virtual_size, NULL_TREE); + else + rval = build_builtin_call (void_type_node, BID, + build_tree_list (NULL_TREE, addr)); + return rval; +} + +/* Generate a call to a destructor. TYPE is the type to cast ADDR to. + ADDR is an expression which yields the store to be destroyed. + AUTO_DELETE is nonzero if a call to DELETE should be made or not. + If in the program, (AUTO_DELETE & 2) is non-zero, we tear down the + virtual baseclasses. + If in the program, (AUTO_DELETE & 1) is non-zero, then we deallocate. + + FLAGS is the logical disjunction of zero or more LOOKUP_ + flags. See cp-tree.h for more info. + + This function does not delete an object's virtual base classes. */ +tree +build_delete (type, addr, auto_delete, flags, use_global_delete) + tree type, addr; + tree auto_delete; + int flags; + int use_global_delete; +{ + tree function, parms; + tree member; + tree expr; + tree ref; + int ptr; + + if (addr == error_mark_node) + return error_mark_node; + + /* Can happen when CURRENT_EXCEPTION_OBJECT gets its type + set to `error_mark_node' before it gets properly cleaned up. */ + if (type == error_mark_node) + return error_mark_node; + + type = TYPE_MAIN_VARIANT (type); + + if (TREE_CODE (type) == POINTER_TYPE) + { + type = TREE_TYPE (type); + if (TYPE_SIZE (type) == 0) + { + incomplete_type_error (0, type); + return error_mark_node; + } + if (TREE_CODE (type) == ARRAY_TYPE) + goto handle_array; + if (! IS_AGGR_TYPE (type)) + { + /* Call the builtin operator delete. */ + return build_builtin_call (void_type_node, BID, + build_tree_list (NULL_TREE, addr)); + } + if (TREE_SIDE_EFFECTS (addr)) + addr = save_expr (addr); + ref = build_indirect_ref (addr, NULL_PTR); + ptr = 1; + } + else if (TREE_CODE (type) == ARRAY_TYPE) + { + handle_array: + if (TREE_SIDE_EFFECTS (addr)) + addr = save_expr (addr); + return build_vec_delete (addr, array_type_nelts (type), + c_sizeof_nowarn (TREE_TYPE (type)), + NULL_TREE, auto_delete, integer_two_node); + } + else + { + /* Don't check PROTECT here; leave that decision to the + destructor. If the destructor is accessible, call it, + else report error. */ + addr = build_unary_op (ADDR_EXPR, addr, 0); + if (TREE_SIDE_EFFECTS (addr)) + addr = save_expr (addr); + + if (TREE_CONSTANT (addr)) + addr = convert_pointer_to (type, addr); + else + addr = convert_force (build_pointer_type (type), addr); + + if (TREE_CODE (addr) == NOP_EXPR + && TREE_OPERAND (addr, 0) == current_class_decl) + ref = C_C_D; + else + ref = build_indirect_ref (addr, NULL_PTR); + ptr = 0; + } + + my_friendly_assert (IS_AGGR_TYPE (type), 220); + + if (! TYPE_NEEDS_DESTRUCTOR (type)) + { + tree virtual_size; + + if (auto_delete == integer_zero_node) + return void_zero_node; + + /* Pass the size of the object down to the operator delete() in + addition to the ADDR. */ + if (TREE_GETS_DELETE (type) && !use_global_delete) + { + /* This is probably wrong. It should be the size of the virtual + object being deleted. */ + tree virtual_size = c_sizeof_nowarn (type); + return build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, + virtual_size, NULL_TREE); + } + + /* Call the builtin operator delete. */ + return build_builtin_call (void_type_node, BID, + build_tree_list (NULL_TREE, addr)); + } + parms = build_tree_list (NULL_TREE, addr); + + /* Below, we will reverse the order in which these calls are made. + If we have a destructor, then that destructor will take care + of the base classes; otherwise, we must do that here. */ + if (TYPE_HAS_DESTRUCTOR (type)) + { + tree dtor = DECL_MAIN_VARIANT (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0)); + tree basetypes = TYPE_BINFO (type); + + if (flags & LOOKUP_PROTECT) + { + enum access_type access = compute_access (basetypes, dtor); + + if (access == access_private) + { + if (flags & LOOKUP_COMPLAIN) + cp_error ("destructor for type `%T' is private in this scope", type); + return error_mark_node; + } + else if (access == access_protected) + { + if (flags & LOOKUP_COMPLAIN) + cp_error ("destructor for type `%T' is protected in this scope", type); + return error_mark_node; + } + } + + /* Once we are in a destructor, try not going through + the virtual function table to find the next destructor. */ + if (DECL_VINDEX (dtor) + && ! (flags & LOOKUP_NONVIRTUAL) + && TREE_CODE (auto_delete) != PARM_DECL + && (ptr == 1 || ! resolves_to_fixed_type_p (ref, 0))) + { + tree binfo, basetype; + /* The code below is probably all broken. See call.c for the + complete right way to do this. this offsets may not be right + in the below. (mrs) */ + /* This destructor must be called via virtual function table. */ + dtor = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (DECL_CONTEXT (dtor)), 0); + basetype = DECL_CLASS_CONTEXT (dtor); + binfo = get_binfo (basetype, + TREE_TYPE (TREE_TYPE (TREE_VALUE (parms))), + 0); + expr = convert_pointer_to_real (binfo, TREE_VALUE (parms)); + if (expr != TREE_VALUE (parms)) + { + expr = fold (expr); + ref = build_indirect_ref (expr, NULL_PTR); + TREE_VALUE (parms) = expr; + } + function = build_vfn_ref (&TREE_VALUE (parms), ref, DECL_VINDEX (dtor)); + if (function == error_mark_node) + return error_mark_node; + TREE_TYPE (function) = build_pointer_type (TREE_TYPE (dtor)); + TREE_CHAIN (parms) = build_tree_list (NULL_TREE, auto_delete); + expr = build_function_call (function, parms); + if (ptr && (flags & LOOKUP_DESTRUCTOR) == 0) + { + /* Handle the case where a virtual destructor is + being called on an item that is 0. + + @@ Does this really need to be done? */ + tree ifexp = build_binary_op(NE_EXPR, addr, integer_zero_node,1); +#if 0 + if (TREE_CODE (ref) == VAR_DECL + || TREE_CODE (ref) == COMPONENT_REF) + warning ("losing in build_delete"); +#endif + expr = build (COND_EXPR, void_type_node, + ifexp, expr, void_zero_node); + } + } + else + { + tree ifexp; + + if ((flags & LOOKUP_DESTRUCTOR) + || TREE_CODE (ref) == VAR_DECL + || TREE_CODE (ref) == PARM_DECL + || TREE_CODE (ref) == COMPONENT_REF + || TREE_CODE (ref) == ARRAY_REF) + /* These can't be 0. */ + ifexp = integer_one_node; + else + /* Handle the case where a non-virtual destructor is + being called on an item that is 0. */ + ifexp = build_binary_op (NE_EXPR, addr, integer_zero_node, 1); + + /* Used to mean that this destructor was known to be empty, + but that's now obsolete. */ + my_friendly_assert (DECL_INITIAL (dtor) != void_type_node, 221); + + TREE_CHAIN (parms) = build_tree_list (NULL_TREE, auto_delete); + expr = build_function_call (dtor, parms); + + if (ifexp != integer_one_node) + expr = build (COND_EXPR, void_type_node, + ifexp, expr, void_zero_node); + } + return expr; + } + else + { + /* This can get visibilities wrong. */ + tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); + int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; + tree base_binfo = n_baseclasses > 0 ? TREE_VEC_ELT (binfos, 0) : NULL_TREE; + tree exprstmt = NULL_TREE; + tree parent_auto_delete = auto_delete; + tree cond; + + /* If this type does not have a destructor, but does have + operator delete, call the parent parent destructor (if any), + but let this node do the deleting. Otherwise, it is ok + to let the parent destructor do the deleting. */ + if (TREE_GETS_DELETE (type) && !use_global_delete) + { + parent_auto_delete = integer_zero_node; + if (auto_delete == integer_zero_node) + cond = NULL_TREE; + else + { + tree virtual_size; + + /* This is probably wrong. It should be the size of the + virtual object being deleted. */ + virtual_size = c_sizeof_nowarn (type); + + expr = build_opfncall (DELETE_EXPR, LOOKUP_NORMAL, addr, + virtual_size, NULL_TREE); + if (expr == error_mark_node) + return error_mark_node; + if (auto_delete != integer_one_node) + cond = build (COND_EXPR, void_type_node, + build (BIT_AND_EXPR, integer_type_node, + auto_delete, integer_one_node), + expr, void_zero_node); + else + cond = expr; + } + } + else if (base_binfo == NULL_TREE + || (TREE_VIA_VIRTUAL (base_binfo) == 0 + && ! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)))) + { + tree virtual_size; + + /* This is probably wrong. It should be the size of the virtual + object being deleted. */ + virtual_size = c_sizeof_nowarn (type); + + cond = build (COND_EXPR, void_type_node, + build (BIT_AND_EXPR, integer_type_node, auto_delete, integer_one_node), + build_builtin_call (void_type_node, BID, + build_tree_list (NULL_TREE, addr)), + void_zero_node); + } + else + cond = NULL_TREE; + + if (cond) + exprstmt = build_tree_list (NULL_TREE, cond); + + if (base_binfo + && ! TREE_VIA_VIRTUAL (base_binfo) + && TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo))) + { + tree this_auto_delete; + + if (BINFO_OFFSET_ZEROP (base_binfo)) + this_auto_delete = parent_auto_delete; + else + this_auto_delete = integer_zero_node; + + expr = build_delete (TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), addr, + this_auto_delete, flags, 0); + exprstmt = tree_cons (NULL_TREE, expr, exprstmt); + } + + /* Take care of the remaining baseclasses. */ + for (i = 1; i < n_baseclasses; i++) + { + base_binfo = TREE_VEC_ELT (binfos, i); + if (! TYPE_NEEDS_DESTRUCTOR (BINFO_TYPE (base_binfo)) + || TREE_VIA_VIRTUAL (base_binfo)) + continue; + + /* May be zero offset if other baseclasses are virtual. */ + expr = fold (build (PLUS_EXPR, TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), + addr, BINFO_OFFSET (base_binfo))); + + expr = build_delete (TYPE_POINTER_TO (BINFO_TYPE (base_binfo)), expr, + integer_zero_node, + flags, 0); + + exprstmt = tree_cons (NULL_TREE, expr, exprstmt); + } + + for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member)) + { + if (TREE_CODE (member) != FIELD_DECL) + continue; + if (TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (member))) + { + tree this_member = build_component_ref (ref, DECL_NAME (member), 0, 0); + tree this_type = TREE_TYPE (member); + expr = build_delete (this_type, this_member, integer_two_node, flags, 0); + exprstmt = tree_cons (NULL_TREE, expr, exprstmt); + } + } + + if (exprstmt) + return build_compound_expr (exprstmt); + /* Virtual base classes make this function do nothing. */ + return void_zero_node; + } +} + +/* For type TYPE, delete the virtual baseclass objects of DECL. */ + +tree +build_vbase_delete (type, decl) + tree type, decl; +{ + tree vbases = CLASSTYPE_VBASECLASSES (type); + tree result = NULL_TREE; + tree addr = build_unary_op (ADDR_EXPR, decl, 0); + + my_friendly_assert (addr != error_mark_node, 222); + + while (vbases) + { + tree this_addr = convert_force (TYPE_POINTER_TO (BINFO_TYPE (vbases)), + addr); + result = tree_cons (NULL_TREE, + build_delete (TREE_TYPE (this_addr), this_addr, + integer_zero_node, + LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0), + result); + vbases = TREE_CHAIN (vbases); + } + return build_compound_expr (nreverse (result)); +} + +/* Build a C++ vector delete expression. + MAXINDEX is the number of elements to be deleted. + ELT_SIZE is the nominal size of each element in the vector. + BASE is the expression that should yield the store to be deleted. + DTOR_DUMMY is a placeholder for a destructor. The library function + __builtin_vec_delete has a pointer to function in this position. + This function expands (or synthesizes) these calls itself. + AUTO_DELETE_VEC says whether the container (vector) should be deallocated. + AUTO_DELETE say whether each item in the container should be deallocated. + + This also calls delete for virtual baseclasses of elements of the vector. + + Update: MAXINDEX is no longer needed. The size can be extracted from the + start of the vector for pointers, and from the type for arrays. We still + use MAXINDEX for arrays because it happens to already have one of the + values we'd have to extract. (We could use MAXINDEX with pointers to + confirm the size, and trap if the numbers differ; not clear that it'd + be worth bothering.) */ +tree +build_vec_delete (base, maxindex, elt_size, dtor_dummy, auto_delete_vec, auto_delete) + tree base, maxindex, elt_size; + tree dtor_dummy; + tree auto_delete_vec, auto_delete; +{ + tree ptype = TREE_TYPE (base); + tree type; + tree virtual_size; + /* Temporary variables used by the loop. */ + tree tbase, size_exp, tbase_init; + + /* This is the body of the loop that implements the deletion of a + single element, and moves temp variables to next elements. */ + tree body; + + /* This is the LOOP_EXPR that governs the deletion of the elements. */ + tree loop; + + /* This is the thing that governs what to do after the loop has run. */ + tree deallocate_expr = 0; + + /* This is the BIND_EXPR which holds the outermost iterator of the + loop. It is convenient to set this variable up and test it before + executing any other code in the loop. + This is also the containing expression returned by this function. */ + tree controller = NULL_TREE; + + /* This is the BLOCK to record the symbol binding for debugging. */ + tree block; + + base = stabilize_reference (base); + + /* Since we can use base many times, save_expr it. */ + if (TREE_SIDE_EFFECTS (base)) + base = save_expr (base); + + if (TREE_CODE (ptype) == POINTER_TYPE) + { + /* Step back one from start of vector, and read dimension. */ + tree cookie_addr = build (MINUS_EXPR, TYPE_POINTER_TO (BI_header_type), + base, BI_header_size); + tree cookie = build_indirect_ref (cookie_addr, NULL_PTR); + maxindex = build_component_ref (cookie, nc_nelts_field_id, 0, 0); + do + ptype = TREE_TYPE (ptype); + while (TREE_CODE (ptype) == ARRAY_TYPE); + } + else if (TREE_CODE (ptype) == ARRAY_TYPE) + { + /* get the total number of things in the array, maxindex is a bad name */ + maxindex = array_type_nelts_total (ptype); + while (TREE_CODE (ptype) == ARRAY_TYPE) + ptype = TREE_TYPE (ptype); + base = build_unary_op (ADDR_EXPR, base, 1); + } + else + { + error ("type to vector delete is neither pointer or array type"); + return error_mark_node; + } + type = ptype; + ptype = TYPE_POINTER_TO (type); + + size_exp = size_in_bytes (type); + + if (! IS_AGGR_TYPE (type) || ! TYPE_NEEDS_DESTRUCTOR (type)) + { + loop = integer_zero_node; + goto no_destructor; + } + + /* The below is short by BI_header_size */ + virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); + + tbase = build_decl (VAR_DECL, NULL_TREE, ptype); + tbase_init = build_modify_expr (tbase, NOP_EXPR, + fold (build (PLUS_EXPR, ptype, + base, + virtual_size))); + DECL_REGISTER (tbase) = 1; + controller = build (BIND_EXPR, void_type_node, tbase, 0, 0); + TREE_SIDE_EFFECTS (controller) = 1; + block = build_block (tbase, 0, 0, 0, 0); + add_block_current_level (block); + + if (auto_delete != integer_zero_node + && auto_delete != integer_two_node) + { + tree base_tbd = convert (ptype, + build_binary_op (MINUS_EXPR, + convert (ptr_type_node, base), + BI_header_size, + 1)); + /* This is the real size */ + virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); + body = build_tree_list (NULL_TREE, + build_x_delete (ptr_type_node, base_tbd, 0, + virtual_size)); + body = build (COND_EXPR, void_type_node, + build (BIT_AND_EXPR, integer_type_node, + auto_delete, integer_one_node), + body, integer_zero_node); + } + else + body = NULL_TREE; + + body = tree_cons (NULL_TREE, + build_delete (ptype, tbase, auto_delete, + LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0), + body); + + body = tree_cons (NULL_TREE, + build_modify_expr (tbase, NOP_EXPR, build (MINUS_EXPR, ptype, tbase, size_exp)), + body); + + body = tree_cons (NULL_TREE, + build (EXIT_EXPR, void_type_node, + build (EQ_EXPR, integer_type_node, base, tbase)), + body); + + loop = build (LOOP_EXPR, void_type_node, build_compound_expr (body)); + + loop = tree_cons (NULL_TREE, tbase_init, + tree_cons (NULL_TREE, loop, NULL_TREE)); + loop = build_compound_expr (loop); + + no_destructor: + /* If the delete flag is one, or anything else with the low bit set, + delete the storage. */ + if (auto_delete_vec == integer_zero_node + || auto_delete_vec == integer_two_node) + deallocate_expr = integer_zero_node; + else + { + tree base_tbd; + + /* The below is short by BI_header_size */ + virtual_size = fold (size_binop (MULT_EXPR, size_exp, maxindex)); + + if (loop == integer_zero_node) + /* no header */ + base_tbd = base; + else + { + base_tbd = convert (ptype, + build_binary_op (MINUS_EXPR, + convert (string_type_node, base), + BI_header_size, + 1)); + /* True size with header. */ + virtual_size = size_binop (PLUS_EXPR, virtual_size, BI_header_size); + } + deallocate_expr = build_x_delete (ptr_type_node, base_tbd, 1, + virtual_size); + if (auto_delete_vec != integer_one_node) + deallocate_expr = build (COND_EXPR, void_type_node, + build (BIT_AND_EXPR, integer_type_node, + auto_delete_vec, integer_one_node), + deallocate_expr, integer_zero_node); + } + + if (loop && deallocate_expr != integer_zero_node) + { + body = tree_cons (NULL_TREE, loop, + tree_cons (NULL_TREE, deallocate_expr, NULL_TREE)); + body = build_compound_expr (body); + } + else + body = loop; + + /* Outermost wrapper: If pointer is null, punt. */ + body = build (COND_EXPR, void_type_node, + build (NE_EXPR, integer_type_node, base, integer_zero_node), + body, integer_zero_node); + body = build1 (NOP_EXPR, void_type_node, body); + + if (controller) + { + TREE_OPERAND (controller, 1) = body; + return controller; + } + else + return convert (void_type_node, body); +} diff --git a/gcc/cp/input.c b/gcc/cp/input.c new file mode 100644 index 0000000..1252aed --- /dev/null +++ b/gcc/cp/input.c @@ -0,0 +1,184 @@ +/* Input handling for G++. + Copyright (C) 1992, 1993 Free Software Foundation, Inc. + Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* G++ needs to do enough saving and re-parsing of text that it is + necessary to abandon the simple FILE* model and use a mechanism where + we can pre-empt one input stream with another derived from saved text; + we may need to do this arbitrarily often, and cannot depend on having + the GNU library available, so FILE objects just don't cut it. + + This file is written as a separate module, but can be included by + cp-lex.c for very minor efficiency gains (primarily in function + inlining). */ + +#include <stdio.h> +#include "obstack.h" + +extern FILE *finput; + +struct pending_input *save_pending_input (); +void restore_pending_input (); + +struct input_source { + /* saved string */ + char *str; + int length; + /* current position, when reading as input */ + int offset; + /* obstack to free this input string from when finished, if any */ + struct obstack *obstack; + /* linked list maintenance */ + struct input_source *next; + /* values to restore after reading all of current string */ + char *filename; + int lineno; + struct pending_input *input; + int putback_char; +}; + +static struct input_source *input, *free_inputs; + +extern char *input_filename; +extern int lineno; + +#ifdef __GNUC__ +#define inline __inline__ +#else +#define inline +#endif + +static inline struct input_source * +allocate_input () +{ + struct input_source *inp; + if (free_inputs) + { + inp = free_inputs; + free_inputs = inp->next; + inp->next = 0; + return inp; + } + inp = (struct input_source *) xmalloc (sizeof (struct input_source)); + inp->next = 0; + inp->obstack = 0; + return inp; +} + +static inline void +free_input (inp) + struct input_source *inp; +{ + if (inp->obstack) + obstack_free (inp->obstack, inp->str); + inp->obstack = 0; + inp->str = 0; + inp->length = 0; + inp->next = free_inputs; + free_inputs = inp; +} + +static int putback_char = -1; + +/* Some of these external functions are declared inline in case this file + is included in cp-lex.c. */ + +inline +void +feed_input (str, len, delete) + char *str; + int len; + struct obstack *delete; +{ + struct input_source *inp = allocate_input (); + + /* This shouldn't be necessary. */ + while (len && !str[len-1]) + len--; + + inp->str = str; + inp->length = len; + inp->obstack = delete; + inp->offset = 0; + inp->next = input; + inp->filename = input_filename; + inp->lineno = lineno; + inp->input = save_pending_input (); + inp->putback_char = putback_char; + putback_char = -1; + input = inp; +} + +struct pending_input *to_be_restored; /* XXX */ +extern int end_of_file; + +int +getch () +{ + if (putback_char != -1) + { + int ch = putback_char; + putback_char = -1; + return ch; + } + if (input) + { + if (input->offset == input->length) + { + struct input_source *inp = input; + my_friendly_assert (putback_char == -1, 223); + to_be_restored = inp->input; + input->offset++; + return EOF; + } + else if (input->offset > input->length) + { + struct input_source *inp = input; + + end_of_file = 0; + input = inp->next; + input_filename = inp->filename; + lineno = inp->lineno; + /* Get interface/implementation back in sync. */ + extract_interface_info (); + putback_char = inp->putback_char; + free_input (inp); + return getch (); + } + if (input) + return input->str[input->offset++]; + } + return getc (finput); +} + +inline +void +put_back (ch) + int ch; +{ + my_friendly_assert (putback_char == -1, 224); + putback_char = ch; +} + +inline +int +input_redirected () +{ + return input != 0; +} diff --git a/gcc/cp/lex.c b/gcc/cp/lex.c new file mode 100644 index 0000000..233a33b --- /dev/null +++ b/gcc/cp/lex.c @@ -0,0 +1,4783 @@ +/* Separate lexical analyzer for GNU C++. + Copyright (C) 1987, 1989, 1992, 1993, 1994 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This file is the lexical analyzer for GNU C++. */ + +#if defined(GATHER_STATISTICS) || defined(SPEW_DEBUG) +#undef YYDEBUG +#define YYDEBUG 1 +#endif + +#include <sys/types.h> +#include <stdio.h> +#include <errno.h> +#include <setjmp.h> +#include "config.h" +#include "input.h" +#include "tree.h" +#include "lex.h" +#include "parse.h" +#include "cp-tree.h" +#include "flags.h" +#include "obstack.h" + +#ifdef MULTIBYTE_CHARS +#include <stdlib.h> +#include <locale.h> +#endif + +#ifndef errno +extern int errno; /* needed for VAX. */ +#endif +extern jmp_buf toplevel; + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +extern struct obstack *expression_obstack, permanent_obstack; +extern struct obstack *current_obstack, *saveable_obstack; + +extern double atof (); + +extern char *get_directive_line (); /* In c-common.c */ + +/* Given a file name X, return the nondirectory portion. + Keep in mind that X can be computed more than once. */ +#ifndef FILE_NAME_NONDIRECTORY +#define FILE_NAME_NONDIRECTORY(X) \ + (rindex (X, '/') != 0 ? rindex (X, '/') + 1 : X) +#endif + +extern char *index (); +extern char *rindex (); + +void extract_interface_info (); +void yyerror (); + +/* This obstack is needed to hold text. It is not safe to use + TOKEN_BUFFER because `check_newline' calls `yylex'. */ +struct obstack inline_text_obstack; +static char *inline_text_firstobj; + +int end_of_file; + +/* Pending language change. + Positive is push count, negative is pop count. */ +int pending_lang_change = 0; + +/* Wrap the current header file in extern "C". */ +static int c_header_level = 0; + +extern int first_token; +extern struct obstack token_obstack; + +/* ??? Don't really know where this goes yet. */ +#if 1 +#include "input.c" +#else +extern void put_back (/* int */); +extern int input_redirected (); +extern void feed_input (/* char *, int, struct obstack * */); +#endif + +/* Holds translations from TREE_CODEs to operator name strings, + i.e., opname_tab[PLUS_EXPR] == "+". */ +char **opname_tab; +char **assignop_tab; + +extern int yychar; /* the lookahead symbol */ +extern YYSTYPE yylval; /* the semantic value of the */ + /* lookahead symbol */ + +#if 0 +YYLTYPE yylloc; /* location data for the lookahead */ + /* symbol */ +#endif + + +/* the declaration found for the last IDENTIFIER token read in. + yylex must look this up to detect typedefs, which get token type TYPENAME, + so it is left around in case the identifier is not a typedef but is + used in a context which makes it a reference to a variable. */ +tree lastiddecl; + +/* The elements of `ridpointers' are identifier nodes + for the reserved type names and storage classes. + It is indexed by a RID_... value. */ +tree ridpointers[(int) RID_MAX]; + +/* We may keep statistics about how long which files took to compile. */ +static int header_time, body_time; +static tree get_time_identifier (); +static tree filename_times; +static tree this_filename_time; + +/* For implementing #pragma unit. */ +tree current_unit_name; +tree current_unit_language; + +/* Array for holding counts of the numbers of tokens seen. */ +extern int *token_count; + +/* Textual definition used for default functions. */ +static void default_copy_constructor_body (); +static void default_assign_ref_body (); + +/* Return something to represent absolute declarators containing a *. + TARGET is the absolute declarator that the * contains. + TYPE_QUALS is a list of modifiers such as const or volatile + to apply to the pointer type, represented as identifiers. + + We return an INDIRECT_REF whose "contents" are TARGET + and whose type is the modifier list. */ + +tree +make_pointer_declarator (type_quals, target) + tree type_quals, target; +{ + if (target && TREE_CODE (target) == IDENTIFIER_NODE + && ANON_AGGRNAME_P (target)) + error ("type name expected before `*'"); + target = build_parse_node (INDIRECT_REF, target); + TREE_TYPE (target) = type_quals; + return target; +} + +/* Return something to represent absolute declarators containing a &. + TARGET is the absolute declarator that the & contains. + TYPE_QUALS is a list of modifiers such as const or volatile + to apply to the reference type, represented as identifiers. + + We return an ADDR_EXPR whose "contents" are TARGET + and whose type is the modifier list. */ + +tree +make_reference_declarator (type_quals, target) + tree type_quals, target; +{ + if (target) + { + if (TREE_CODE (target) == ADDR_EXPR) + { + error ("cannot declare references to references"); + return target; + } + if (TREE_CODE (target) == INDIRECT_REF) + { + error ("cannot declare pointers to references"); + return target; + } + if (TREE_CODE (target) == IDENTIFIER_NODE && ANON_AGGRNAME_P (target)) + error ("type name expected before `&'"); + } + target = build_parse_node (ADDR_EXPR, target); + TREE_TYPE (target) = type_quals; + return target; +} + +/* Build names and nodes for overloaded operators. */ + +tree ansi_opname[LAST_CPLUS_TREE_CODE]; +tree ansi_assopname[LAST_CPLUS_TREE_CODE]; + +char * +operator_name_string (name) + tree name; +{ + char *opname = IDENTIFIER_POINTER (name) + 2; + tree *opname_table; + int i, assign; + + /* Works for builtin and user defined types. */ + if (IDENTIFIER_GLOBAL_VALUE (name) + && TREE_CODE (IDENTIFIER_GLOBAL_VALUE (name)) == TYPE_DECL) + return IDENTIFIER_POINTER (name); + + if (opname[0] == 'a' && opname[2] != '\0' && opname[2] != '_') + { + opname += 1; + assign = 1; + opname_table = ansi_assopname; + } + else + { + assign = 0; + opname_table = ansi_opname; + } + + for (i = 0; i < (int) LAST_CPLUS_TREE_CODE; i++) + { + if (opname[0] == IDENTIFIER_POINTER (opname_table[i])[2+assign] + && opname[1] == IDENTIFIER_POINTER (opname_table[i])[3+assign]) + break; + } + + if (i == LAST_CPLUS_TREE_CODE) + return "<invalid operator>"; + + if (assign) + return assignop_tab[i]; + else + return opname_tab[i]; +} + +int interface_only; /* whether or not current file is only for + interface definitions. */ +int interface_unknown; /* whether or not we know this class + to behave according to #pragma interface. */ + +/* lexical analyzer */ + +/* File used for outputting assembler code. */ +extern FILE *asm_out_file; + +#ifndef WCHAR_TYPE_SIZE +#ifdef INT_TYPE_SIZE +#define WCHAR_TYPE_SIZE INT_TYPE_SIZE +#else +#define WCHAR_TYPE_SIZE BITS_PER_WORD +#endif +#endif + +/* Number of bytes in a wide character. */ +#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT) + +static int maxtoken; /* Current nominal length of token buffer. */ +char *token_buffer; /* Pointer to token buffer. + Actual allocated length is maxtoken + 2. */ + +#include "hash.h" + +int check_newline (); + +/* Nonzero tells yylex to ignore \ in string constants. */ +static int ignore_escape_flag = 0; + +static int skip_white_space (); + +static tree +get_time_identifier (name) + char *name; +{ + tree time_identifier; + int len = strlen (name); + char *buf = (char *) alloca (len + 6); + strcpy (buf, "file "); + bcopy (name, buf+5, len); + buf[len+5] = '\0'; + time_identifier = get_identifier (buf); + if (IDENTIFIER_LOCAL_VALUE (time_identifier) == NULL_TREE) + { + push_obstacks_nochange (); + end_temporary_allocation (); + IDENTIFIER_LOCAL_VALUE (time_identifier) = build_int_2 (0, 0); + IDENTIFIER_CLASS_VALUE (time_identifier) = build_int_2 (0, 1); + IDENTIFIER_GLOBAL_VALUE (time_identifier) = filename_times; + filename_times = time_identifier; + pop_obstacks (); + } + return time_identifier; +} + +#ifdef __GNUC__ +__inline +#endif +static int +my_get_run_time () +{ + int old_quiet_flag = quiet_flag; + int this_time; + quiet_flag = 0; + this_time = get_run_time (); + quiet_flag = old_quiet_flag; + return this_time; +} + +/* Table indexed by tree code giving a string containing a character + classifying the tree code. Possibilities are + t, d, s, c, r, <, 1 and 2. See cp-tree.def for details. */ + +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, + +char *cplus_tree_code_type[] = { + "x", +#include "tree.def" +}; +#undef DEFTREECODE + +/* Table indexed by tree code giving number of expression + operands beyond the fixed part of the node structure. + Not used for types or decls. */ + +#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH, + +int cplus_tree_code_length[] = { + 0, +#include "tree.def" +}; +#undef DEFTREECODE + +/* Names of tree components. + Used for printing out the tree and error messages. */ +#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME, + +char *cplus_tree_code_name[] = { + "@@dummy", +#include "tree.def" +}; +#undef DEFTREECODE + +/* toplev.c needs to call these. */ + +void +lang_init () +{ + /* the beginning of the file is a new line; check for # */ + /* With luck, we discover the real source file's name from that + and put it in input_filename. */ + put_back (check_newline ()); + + if (flag_cadillac) + cadillac_start (); + if (flag_gnu_xref) GNU_xref_begin (input_filename); +} + +void +lang_finish () +{ + extern int errorcount, sorrycount; + if (flag_gnu_xref) GNU_xref_end (errorcount+sorrycount); +} + +char * +lang_identify () +{ + return "cplusplus"; +} + +void +init_filename_times () +{ + this_filename_time = get_time_identifier ("<top level>"); + if (flag_detailed_statistics) + { + header_time = 0; + body_time = my_get_run_time (); + TREE_INT_CST_LOW (IDENTIFIER_LOCAL_VALUE (this_filename_time)) = body_time; + } +} + +/* Change by Bryan Boreham, Kewill, Thu Jul 27 09:46:05 1989. + Stuck this hack in to get the files open correctly; this is called + in place of init_lex if we are an unexec'd binary. */ +void +reinit_lang_specific () +{ + init_filename_times (); + reinit_search_statistics (); +} + +void +init_lex () +{ + extern char *(*decl_printable_name) (); + + int i; + + /* Initialize the lookahead machinery. */ + init_spew (); + + /* Make identifier nodes long enough for the language-specific slots. */ + set_identifier_size (sizeof (struct lang_identifier)); + decl_printable_name = lang_printable_name; + + init_cplus_expand (); + + tree_code_type + = (char **) realloc (tree_code_type, + sizeof (char *) * LAST_CPLUS_TREE_CODE); + tree_code_length + = (int *) realloc (tree_code_length, + sizeof (int) * LAST_CPLUS_TREE_CODE); + tree_code_name + = (char **) realloc (tree_code_name, + sizeof (char *) * LAST_CPLUS_TREE_CODE); + bcopy ((char *)cplus_tree_code_type, + (char *)(tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE), + (LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *)); + bcopy ((char *)cplus_tree_code_length, + (char *)(tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE), + (LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int)); + bcopy ((char *)cplus_tree_code_name, + (char *)(tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE), + (LAST_CPLUS_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *)); + + opname_tab = (char **)oballoc ((int)LAST_CPLUS_TREE_CODE * sizeof (char *)); + bzero ((char *)opname_tab, (int)LAST_CPLUS_TREE_CODE * sizeof (char *)); + assignop_tab = (char **)oballoc ((int)LAST_CPLUS_TREE_CODE * sizeof (char *)); + bzero ((char *)assignop_tab, (int)LAST_CPLUS_TREE_CODE * sizeof (char *)); + + ansi_opname[0] = get_identifier ("<invalid operator>"); + for (i = 0; i < (int) LAST_CPLUS_TREE_CODE; i++) + { + ansi_opname[i] = ansi_opname[0]; + ansi_assopname[i] = ansi_opname[0]; + } + + ansi_opname[(int) MULT_EXPR] = get_identifier ("__ml"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MULT_EXPR]) = 1; + ansi_opname[(int) INDIRECT_REF] = ansi_opname[(int) MULT_EXPR]; + ansi_assopname[(int) MULT_EXPR] = get_identifier ("__aml"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) MULT_EXPR]) = 1; + ansi_assopname[(int) INDIRECT_REF] = ansi_assopname[(int) MULT_EXPR]; + ansi_opname[(int) TRUNC_MOD_EXPR] = get_identifier ("__md"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUNC_MOD_EXPR]) = 1; + ansi_assopname[(int) TRUNC_MOD_EXPR] = get_identifier ("__amd"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) TRUNC_MOD_EXPR]) = 1; + ansi_opname[(int) CEIL_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR]; + ansi_opname[(int) FLOOR_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR]; + ansi_opname[(int) ROUND_MOD_EXPR] = ansi_opname[(int) TRUNC_MOD_EXPR]; + ansi_opname[(int) MINUS_EXPR] = get_identifier ("__mi"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MINUS_EXPR]) = 1; + ansi_opname[(int) NEGATE_EXPR] = ansi_opname[(int) MINUS_EXPR]; + ansi_assopname[(int) MINUS_EXPR] = get_identifier ("__ami"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) MINUS_EXPR]) = 1; + ansi_assopname[(int) NEGATE_EXPR] = ansi_assopname[(int) MINUS_EXPR]; + ansi_opname[(int) RSHIFT_EXPR] = get_identifier ("__rs"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) RSHIFT_EXPR]) = 1; + ansi_assopname[(int) RSHIFT_EXPR] = get_identifier ("__ars"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) RSHIFT_EXPR]) = 1; + ansi_opname[(int) NE_EXPR] = get_identifier ("__ne"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) NE_EXPR]) = 1; + ansi_opname[(int) GT_EXPR] = get_identifier ("__gt"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) GT_EXPR]) = 1; + ansi_opname[(int) GE_EXPR] = get_identifier ("__ge"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) GE_EXPR]) = 1; + ansi_opname[(int) BIT_IOR_EXPR] = get_identifier ("__or"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_IOR_EXPR]) = 1; + ansi_assopname[(int) BIT_IOR_EXPR] = get_identifier ("__aor"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_IOR_EXPR]) = 1; + ansi_opname[(int) TRUTH_ANDIF_EXPR] = get_identifier ("__aa"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_ANDIF_EXPR]) = 1; + ansi_opname[(int) TRUTH_NOT_EXPR] = get_identifier ("__nt"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_NOT_EXPR]) = 1; + ansi_opname[(int) PREINCREMENT_EXPR] = get_identifier ("__pp"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) PREINCREMENT_EXPR]) = 1; + ansi_opname[(int) POSTINCREMENT_EXPR] = ansi_opname[(int) PREINCREMENT_EXPR]; + ansi_opname[(int) MODIFY_EXPR] = get_identifier ("__as"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MODIFY_EXPR]) = 1; + ansi_assopname[(int) NOP_EXPR] = ansi_opname[(int) MODIFY_EXPR]; + ansi_opname[(int) COMPOUND_EXPR] = get_identifier ("__cm"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) COMPOUND_EXPR]) = 1; + ansi_opname[(int) EXACT_DIV_EXPR] = get_identifier ("__dv"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) EXACT_DIV_EXPR]) = 1; + ansi_assopname[(int) EXACT_DIV_EXPR] = get_identifier ("__adv"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) EXACT_DIV_EXPR]) = 1; + ansi_opname[(int) TRUNC_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR]; + ansi_opname[(int) CEIL_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR]; + ansi_opname[(int) FLOOR_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR]; + ansi_opname[(int) ROUND_DIV_EXPR] = ansi_opname[(int) EXACT_DIV_EXPR]; + ansi_opname[(int) PLUS_EXPR] = get_identifier ("__pl"); + ansi_assopname[(int) TRUNC_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR]; + ansi_assopname[(int) CEIL_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR]; + ansi_assopname[(int) FLOOR_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR]; + ansi_assopname[(int) ROUND_DIV_EXPR] = ansi_assopname[(int) EXACT_DIV_EXPR]; + IDENTIFIER_OPNAME_P (ansi_opname[(int) PLUS_EXPR]) = 1; + ansi_assopname[(int) PLUS_EXPR] = get_identifier ("__apl"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) PLUS_EXPR]) = 1; + ansi_opname[(int) CONVERT_EXPR] = ansi_opname[(int) PLUS_EXPR]; + ansi_assopname[(int) CONVERT_EXPR] = ansi_assopname[(int) PLUS_EXPR]; + ansi_opname[(int) LSHIFT_EXPR] = get_identifier ("__ls"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) LSHIFT_EXPR]) = 1; + ansi_assopname[(int) LSHIFT_EXPR] = get_identifier ("__als"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) LSHIFT_EXPR]) = 1; + ansi_opname[(int) EQ_EXPR] = get_identifier ("__eq"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) EQ_EXPR]) = 1; + ansi_opname[(int) LT_EXPR] = get_identifier ("__lt"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) LT_EXPR]) = 1; + ansi_opname[(int) LE_EXPR] = get_identifier ("__le"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) LE_EXPR]) = 1; + ansi_opname[(int) BIT_AND_EXPR] = get_identifier ("__ad"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_AND_EXPR]) = 1; + ansi_assopname[(int) BIT_AND_EXPR] = get_identifier ("__aad"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_AND_EXPR]) = 1; + ansi_opname[(int) ADDR_EXPR] = ansi_opname[(int) BIT_AND_EXPR]; + ansi_assopname[(int) ADDR_EXPR] = ansi_assopname[(int) BIT_AND_EXPR]; + ansi_opname[(int) BIT_XOR_EXPR] = get_identifier ("__er"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_XOR_EXPR]) = 1; + ansi_assopname[(int) BIT_XOR_EXPR] = get_identifier ("__aer"); + IDENTIFIER_OPNAME_P (ansi_assopname[(int) BIT_XOR_EXPR]) = 1; + ansi_opname[(int) TRUTH_ORIF_EXPR] = get_identifier ("__oo"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) TRUTH_ORIF_EXPR]) = 1; + ansi_opname[(int) BIT_NOT_EXPR] = get_identifier ("__co"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) BIT_NOT_EXPR]) = 1; + ansi_opname[(int) PREDECREMENT_EXPR] = get_identifier ("__mm"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) PREDECREMENT_EXPR]) = 1; + ansi_opname[(int) POSTDECREMENT_EXPR] = ansi_opname[(int) PREDECREMENT_EXPR]; + ansi_opname[(int) COMPONENT_REF] = get_identifier ("__rf"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) COMPONENT_REF]) = 1; + ansi_opname[(int) MEMBER_REF] = get_identifier ("__rm"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MEMBER_REF]) = 1; + ansi_opname[(int) CALL_EXPR] = get_identifier ("__cl"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) CALL_EXPR]) = 1; + ansi_opname[(int) ARRAY_REF] = get_identifier ("__vc"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) ARRAY_REF]) = 1; + ansi_opname[(int) NEW_EXPR] = get_identifier ("__nw"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) NEW_EXPR]) = 1; + ansi_opname[(int) DELETE_EXPR] = get_identifier ("__dl"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) DELETE_EXPR]) = 1; + ansi_opname[(int) TYPE_EXPR] = get_identifier ("__op"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) TYPE_EXPR]) = 1; + + /* This is not true: these operators are not defined in ANSI, + but we need them anyway. */ + ansi_opname[(int) MIN_EXPR] = get_identifier ("__mn"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MIN_EXPR]) = 1; + ansi_opname[(int) MAX_EXPR] = get_identifier ("__mx"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) MAX_EXPR]) = 1; + ansi_opname[(int) COND_EXPR] = get_identifier ("__cn"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) COND_EXPR]) = 1; + ansi_opname[(int) METHOD_CALL_EXPR] = get_identifier ("__wr"); + IDENTIFIER_OPNAME_P (ansi_opname[(int) METHOD_CALL_EXPR]) = 1; + + init_method (); + init_error (); + gcc_obstack_init (&inline_text_obstack); + inline_text_firstobj = (char *) obstack_alloc (&inline_text_obstack, 0); + + /* Start it at 0, because check_newline is called at the very beginning + and will increment it to 1. */ + lineno = 0; + input_filename = "<internal>"; + current_function_decl = NULL; + + maxtoken = 40; + token_buffer = (char *) xmalloc (maxtoken + 2); + + ridpointers[(int) RID_INT] = get_identifier ("int"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_INT], + build_tree_list (NULL_TREE, ridpointers[(int) RID_INT])); + ridpointers[(int) RID_CHAR] = get_identifier ("char"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_CHAR], + build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR])); + ridpointers[(int) RID_VOID] = get_identifier ("void"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_VOID], + build_tree_list (NULL_TREE, ridpointers[(int) RID_VOID])); + ridpointers[(int) RID_FLOAT] = get_identifier ("float"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_FLOAT], + build_tree_list (NULL_TREE, ridpointers[(int) RID_FLOAT])); + ridpointers[(int) RID_DOUBLE] = get_identifier ("double"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_DOUBLE], + build_tree_list (NULL_TREE, ridpointers[(int) RID_DOUBLE])); + ridpointers[(int) RID_SHORT] = get_identifier ("short"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_SHORT], + build_tree_list (NULL_TREE, ridpointers[(int) RID_SHORT])); + ridpointers[(int) RID_LONG] = get_identifier ("long"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_LONG], + build_tree_list (NULL_TREE, ridpointers[(int) RID_LONG])); + ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_UNSIGNED], + build_tree_list (NULL_TREE, ridpointers[(int) RID_UNSIGNED])); + ridpointers[(int) RID_SIGNED] = get_identifier ("signed"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_SIGNED], + build_tree_list (NULL_TREE, ridpointers[(int) RID_SIGNED])); + ridpointers[(int) RID_INLINE] = get_identifier ("inline"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_INLINE], + build_tree_list (NULL_TREE, ridpointers[(int) RID_INLINE])); + ridpointers[(int) RID_CONST] = get_identifier ("const"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_CONST], + build_tree_list (NULL_TREE, ridpointers[(int) RID_CONST])); + ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_VOLATILE], + build_tree_list (NULL_TREE, ridpointers[(int) RID_VOLATILE])); + ridpointers[(int) RID_AUTO] = get_identifier ("auto"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_AUTO], + build_tree_list (NULL_TREE, ridpointers[(int) RID_AUTO])); + ridpointers[(int) RID_STATIC] = get_identifier ("static"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_STATIC], + build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC])); + ridpointers[(int) RID_EXTERN] = get_identifier ("extern"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_EXTERN], + build_tree_list (NULL_TREE, ridpointers[(int) RID_EXTERN])); + ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_TYPEDEF], + build_tree_list (NULL_TREE, ridpointers[(int) RID_TYPEDEF])); + ridpointers[(int) RID_REGISTER] = get_identifier ("register"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_REGISTER], + build_tree_list (NULL_TREE, ridpointers[(int) RID_REGISTER])); + + /* C++ extensions. These are probably not correctly named. */ + ridpointers[(int) RID_WCHAR] = get_identifier ("__wchar_t"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_WCHAR], + build_tree_list (NULL_TREE, ridpointers[(int) RID_WCHAR])); + class_type_node = build_int_2 (class_type, 0); + TREE_TYPE (class_type_node) = class_type_node; + ridpointers[(int) RID_CLASS] = class_type_node; + + record_type_node = build_int_2 (record_type, 0); + TREE_TYPE (record_type_node) = record_type_node; + ridpointers[(int) RID_RECORD] = record_type_node; + + union_type_node = build_int_2 (union_type, 0); + TREE_TYPE (union_type_node) = union_type_node; + ridpointers[(int) RID_UNION] = union_type_node; + + enum_type_node = build_int_2 (enum_type, 0); + TREE_TYPE (enum_type_node) = enum_type_node; + ridpointers[(int) RID_ENUM] = enum_type_node; + + ridpointers[(int) RID_VIRTUAL] = get_identifier ("virtual"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_VIRTUAL], + build_tree_list (NULL_TREE, ridpointers[(int) RID_VIRTUAL])); + ridpointers[(int) RID_FRIEND] = get_identifier ("friend"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_FRIEND], + build_tree_list (NULL_TREE, ridpointers[(int) RID_FRIEND])); + + ridpointers[(int) RID_PUBLIC] = get_identifier ("public"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_PUBLIC], + build_tree_list (NULL_TREE, ridpointers[(int) RID_PUBLIC])); + ridpointers[(int) RID_PRIVATE] = get_identifier ("private"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_PRIVATE], + build_tree_list (NULL_TREE, ridpointers[(int) RID_PRIVATE])); + ridpointers[(int) RID_PROTECTED] = get_identifier ("protected"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_PROTECTED], + build_tree_list (NULL_TREE, ridpointers[(int) RID_PROTECTED])); + /* This is for ANSI C++. */ + ridpointers[(int) RID_MUTABLE] = get_identifier ("mutable"); + SET_IDENTIFIER_AS_LIST (ridpointers[(int) RID_MUTABLE], + build_tree_list (NULL_TREE, ridpointers[(int) RID_MUTABLE])); + + /* Exception handling extensions. */ + exception_type_node = build_int_2 (exception_type, 0); + TREE_TYPE (exception_type_node) = exception_type_node; + ridpointers[(int) RID_EXCEPTION] = exception_type_node; + + /* Signature handling extensions. */ + signature_type_node = build_int_2 (signature_type, 0); + TREE_TYPE (signature_type_node) = signature_type_node; + ridpointers[(int) RID_SIGNATURE] = signature_type_node; + + opname_tab[(int) COMPONENT_REF] = "->"; + opname_tab[(int) MEMBER_REF] = "->*"; + opname_tab[(int) METHOD_CALL_EXPR] = "->()"; + opname_tab[(int) INDIRECT_REF] = "(unary *)"; + opname_tab[(int) ARRAY_REF] = "[]"; + opname_tab[(int) MODIFY_EXPR] = "="; + opname_tab[(int) NEW_EXPR] = "new"; + opname_tab[(int) DELETE_EXPR] = "delete"; + opname_tab[(int) COND_EXPR] = "... ? ... : ..."; + opname_tab[(int) CALL_EXPR] = "()"; + opname_tab[(int) PLUS_EXPR] = "+"; + opname_tab[(int) MINUS_EXPR] = "-"; + opname_tab[(int) MULT_EXPR] = "*"; + opname_tab[(int) TRUNC_DIV_EXPR] = "/"; + opname_tab[(int) CEIL_DIV_EXPR] = "(ceiling /)"; + opname_tab[(int) FLOOR_DIV_EXPR] = "(floor /)"; + opname_tab[(int) ROUND_DIV_EXPR] = "(round /)"; + opname_tab[(int) TRUNC_MOD_EXPR] = "%"; + opname_tab[(int) CEIL_MOD_EXPR] = "(ceiling %)"; + opname_tab[(int) FLOOR_MOD_EXPR] = "(floor %)"; + opname_tab[(int) ROUND_MOD_EXPR] = "(round %)"; + opname_tab[(int) NEGATE_EXPR] = "-"; + opname_tab[(int) MIN_EXPR] = "<?"; + opname_tab[(int) MAX_EXPR] = ">?"; + opname_tab[(int) ABS_EXPR] = "abs"; + opname_tab[(int) FFS_EXPR] = "ffs"; + opname_tab[(int) LSHIFT_EXPR] = "<<"; + opname_tab[(int) RSHIFT_EXPR] = ">>"; + opname_tab[(int) BIT_IOR_EXPR] = "|"; + opname_tab[(int) BIT_XOR_EXPR] = "^"; + opname_tab[(int) BIT_AND_EXPR] = "&"; + opname_tab[(int) BIT_ANDTC_EXPR] = "&~"; + opname_tab[(int) BIT_NOT_EXPR] = "~"; + opname_tab[(int) TRUTH_ANDIF_EXPR] = "&&"; + opname_tab[(int) TRUTH_ORIF_EXPR] = "||"; + opname_tab[(int) TRUTH_AND_EXPR] = "strict &&"; + opname_tab[(int) TRUTH_OR_EXPR] = "strict ||"; + opname_tab[(int) TRUTH_NOT_EXPR] = "!"; + opname_tab[(int) LT_EXPR] = "<"; + opname_tab[(int) LE_EXPR] = "<="; + opname_tab[(int) GT_EXPR] = ">"; + opname_tab[(int) GE_EXPR] = ">="; + opname_tab[(int) EQ_EXPR] = "=="; + opname_tab[(int) NE_EXPR] = "!="; + opname_tab[(int) IN_EXPR] = "in"; + opname_tab[(int) RANGE_EXPR] = ".."; + opname_tab[(int) CONVERT_EXPR] = "(unary +)"; + opname_tab[(int) ADDR_EXPR] = "(unary &)"; + opname_tab[(int) PREDECREMENT_EXPR] = "--"; + opname_tab[(int) PREINCREMENT_EXPR] = "++"; + opname_tab[(int) POSTDECREMENT_EXPR] = "--"; + opname_tab[(int) POSTINCREMENT_EXPR] = "++"; + opname_tab[(int) COMPOUND_EXPR] = ","; + + assignop_tab[(int) NOP_EXPR] = "="; + assignop_tab[(int) PLUS_EXPR] = "+="; + assignop_tab[(int) CONVERT_EXPR] = "+="; + assignop_tab[(int) MINUS_EXPR] = "-="; + assignop_tab[(int) NEGATE_EXPR] = "-="; + assignop_tab[(int) MULT_EXPR] = "*="; + assignop_tab[(int) INDIRECT_REF] = "*="; + assignop_tab[(int) TRUNC_DIV_EXPR] = "/="; + assignop_tab[(int) EXACT_DIV_EXPR] = "(exact /=)"; + assignop_tab[(int) CEIL_DIV_EXPR] = "(ceiling /=)"; + assignop_tab[(int) FLOOR_DIV_EXPR] = "(floor /=)"; + assignop_tab[(int) ROUND_DIV_EXPR] = "(round /=)"; + assignop_tab[(int) TRUNC_MOD_EXPR] = "%="; + assignop_tab[(int) CEIL_MOD_EXPR] = "(ceiling %=)"; + assignop_tab[(int) FLOOR_MOD_EXPR] = "(floor %=)"; + assignop_tab[(int) ROUND_MOD_EXPR] = "(round %=)"; + assignop_tab[(int) MIN_EXPR] = "<?="; + assignop_tab[(int) MAX_EXPR] = ">?="; + assignop_tab[(int) LSHIFT_EXPR] = "<<="; + assignop_tab[(int) RSHIFT_EXPR] = ">>="; + assignop_tab[(int) BIT_IOR_EXPR] = "|="; + assignop_tab[(int) BIT_XOR_EXPR] = "^="; + assignop_tab[(int) BIT_AND_EXPR] = "&="; + assignop_tab[(int) ADDR_EXPR] = "&="; + + init_filename_times (); + + /* Some options inhibit certain reserved words. + Clear those words out of the hash table so they won't be recognized. */ +#define UNSET_RESERVED_WORD(STRING) \ + do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \ + if (s) s->name = ""; } while (0) + + if (flag_ansi_exceptions) + flag_handle_exceptions = 2; + + if (!flag_ansi_exceptions) + { + UNSET_RESERVED_WORD ("catch"); + } + + if (! flag_handle_exceptions) + { + /* Easiest way to not recognize exception + handling extensions... */ + UNSET_RESERVED_WORD ("all"); + UNSET_RESERVED_WORD ("except"); + UNSET_RESERVED_WORD ("exception"); + UNSET_RESERVED_WORD ("raise"); + UNSET_RESERVED_WORD ("raises"); + UNSET_RESERVED_WORD ("reraise"); + UNSET_RESERVED_WORD ("try"); + UNSET_RESERVED_WORD ("throw"); + } + else if (flag_ansi_exceptions) + { + /* Easiest way to not recognize exception + handling extensions... */ + UNSET_RESERVED_WORD ("exception"); + UNSET_RESERVED_WORD ("all"); + UNSET_RESERVED_WORD ("except"); + UNSET_RESERVED_WORD ("raise"); + UNSET_RESERVED_WORD ("raises"); + UNSET_RESERVED_WORD ("reraise"); + is_reserved_word ("try", sizeof ("try") - 1)->token = ANSI_TRY; + is_reserved_word ("throw", sizeof ("throw") - 1)->token = ANSI_THROW; + } + if (! (flag_gc || flag_dossier)) + { + UNSET_RESERVED_WORD ("classof"); + UNSET_RESERVED_WORD ("headof"); + } + if (! flag_handle_signatures) + { + /* Easiest way to not recognize signature + handling extensions... */ + UNSET_RESERVED_WORD ("signature"); + UNSET_RESERVED_WORD ("sigof"); + } + if (flag_no_asm) + UNSET_RESERVED_WORD ("asm"); + if (flag_no_asm || flag_traditional) + UNSET_RESERVED_WORD ("typeof"); + + token_count = init_parse (); + interface_unknown = 1; +} + +void +reinit_parse_for_function () +{ + current_base_init_list = NULL_TREE; + current_member_init_list = NULL_TREE; +} + +#ifdef __GNUC__ +__inline +#endif +void +yyprint (file, yychar, yylval) + FILE *file; + int yychar; + YYSTYPE yylval; +{ + tree t; + switch (yychar) + { + case IDENTIFIER: + case TYPENAME: + case TYPESPEC: + case PTYPENAME: + case IDENTIFIER_DEFN: + case TYPENAME_DEFN: + case PTYPENAME_DEFN: + case TYPENAME_COLON: + case TYPENAME_ELLIPSIS: + case SCOPED_TYPENAME: + case SCOPED_NAME: + case SCSPEC: + case PRE_PARSED_CLASS_DECL: + t = yylval.ttype; + my_friendly_assert (TREE_CODE (t) == IDENTIFIER_NODE, 224); + if (IDENTIFIER_POINTER (t)) + fprintf (file, " `%s'", IDENTIFIER_POINTER (t)); + break; + case AGGR: + if (yylval.ttype == class_type_node) + fprintf (file, " `class'"); + else if (yylval.ttype == record_type_node) + fprintf (file, " `struct'"); + else if (yylval.ttype == union_type_node) + fprintf (file, " `union'"); + else if (yylval.ttype == enum_type_node) + fprintf (file, " `enum'"); + else if (yylval.ttype == signature_type_node) + fprintf (file, " `signature'"); + else + my_friendly_abort (80); + break; + } +} + +static int *reduce_count; +int *token_count; + +#define REDUCE_LENGTH (sizeof (yyr2) / sizeof (yyr2[0])) +#define TOKEN_LENGTH (256 + sizeof (yytname) / sizeof (yytname[0])) + +int * +init_parse () +{ +#ifdef GATHER_STATISTICS + reduce_count = (int *)malloc (sizeof (int) * (REDUCE_LENGTH + 1)); + bzero (reduce_count, sizeof (int) * (REDUCE_LENGTH + 1)); + reduce_count += 1; + token_count = (int *)malloc (sizeof (int) * (TOKEN_LENGTH + 1)); + bzero (token_count, sizeof (int) * (TOKEN_LENGTH + 1)); + token_count += 1; +#endif + return token_count; +} + +#ifdef GATHER_STATISTICS +void +yyhook (yyn) + int yyn; +{ + reduce_count[yyn] += 1; +} +#endif + +static int +reduce_cmp (p, q) + int *p, *q; +{ + return reduce_count[*q] - reduce_count[*p]; +} + +static int +token_cmp (p, q) + int *p, *q; +{ + return token_count[*q] - token_count[*p]; +} + +void +print_parse_statistics () +{ +#ifdef GATHER_STATISTICS +#if YYDEBUG != 0 + int i; + int maxlen = REDUCE_LENGTH; + unsigned *sorted; + + if (reduce_count[-1] == 0) + return; + + if (TOKEN_LENGTH > REDUCE_LENGTH) + maxlen = TOKEN_LENGTH; + sorted = (unsigned *) alloca (sizeof (int) * maxlen); + + for (i = 0; i < TOKEN_LENGTH; i++) + sorted[i] = i; + qsort (sorted, TOKEN_LENGTH, sizeof (int), token_cmp); + for (i = 0; i < TOKEN_LENGTH; i++) + { + int index = sorted[i]; + if (token_count[index] == 0) + break; + if (token_count[index] < token_count[-1]) + break; + fprintf (stderr, "token %d, `%s', count = %d\n", + index, yytname[YYTRANSLATE (index)], token_count[index]); + } + fprintf (stderr, "\n"); + for (i = 0; i < REDUCE_LENGTH; i++) + sorted[i] = i; + qsort (sorted, REDUCE_LENGTH, sizeof (int), reduce_cmp); + for (i = 0; i < REDUCE_LENGTH; i++) + { + int index = sorted[i]; + if (reduce_count[index] == 0) + break; + if (reduce_count[index] < reduce_count[-1]) + break; + fprintf (stderr, "rule %d, line %d, count = %d\n", + index, yyrline[index], reduce_count[index]); + } + fprintf (stderr, "\n"); +#endif +#endif +} + +/* Sets the value of the 'yydebug' variable to VALUE. + This is a function so we don't have to have YYDEBUG defined + in order to build the compiler. */ +void +set_yydebug (value) + int value; +{ +#if YYDEBUG != 0 + extern int yydebug; + yydebug = value; +#else + warning ("YYDEBUG not defined."); +#endif +} + +#ifdef SPEW_DEBUG +const char * +debug_yytranslate (value) + int value; +{ + return yytname[YYTRANSLATE (value)]; +} + +#endif + +/* Functions and data structures for #pragma interface. + + `#pragma implementation' means that the main file being compiled + is considered to implement (provide) the classes that appear in + its main body. I.e., if this is file "foo.cc", and class `bar' + is defined in "foo.cc", then we say that "foo.cc implements bar". + + All main input files "implement" themselves automagically. + + `#pragma interface' means that unless this file (of the form "foo.h" + is not presently being included by file "foo.cc", the + CLASSTYPE_INTERFACE_ONLY bit gets set. The effect is that none + of the vtables nor any of the inline functions defined in foo.h + will ever be output. + + There are cases when we want to link files such as "defs.h" and + "main.cc". In this case, we give "defs.h" a `#pragma interface', + and "main.cc" has `#pragma implementation "defs.h"'. */ + +struct impl_files +{ + char *filename; + struct impl_files *next; +}; + +static struct impl_files *impl_file_chain; + +/* Helper function to load global variables with interface + information. */ +void +extract_interface_info () +{ + tree fileinfo = 0; + + if (flag_alt_external_templates) + { + struct tinst_level *til = tinst_for_decl (); + + if (til) + fileinfo = get_time_identifier (til->file); + } + if (!fileinfo) + fileinfo = get_time_identifier (input_filename); + fileinfo = IDENTIFIER_CLASS_VALUE (fileinfo); + interface_only = TREE_INT_CST_LOW (fileinfo); + if (!processing_template_defn || flag_external_templates) + interface_unknown = TREE_INT_CST_HIGH (fileinfo); +} + +/* Return nonzero if S and T are not considered part of an + INTERFACE/IMPLEMENTATION pair. Otherwise, return 0. */ +static int +interface_strcmp (s) + char *s; +{ + /* Set the interface/implementation bits for this scope. */ + struct impl_files *ifiles; + char *s1; + + s = FILE_NAME_NONDIRECTORY (s); + + for (ifiles = impl_file_chain; ifiles; ifiles = ifiles->next) + { + char *t1 = ifiles->filename; + s1 = s; + + if (*s1 != *t1 || *s1 == 0) + continue; + + while (*s1 == *t1 && *s1 != 0) + s1++, t1++; + + /* A match. */ + if (*s1 == *t1) + return 0; + + /* Don't get faked out by xxx.yyy.cc vs xxx.zzz.cc. */ + if (index (s1, '.') || index (t1, '.')) + continue; + + if (*s1 == '\0' || s1[-1] != '.' || t1[-1] != '.') + continue; + + /* A match. */ + return 0; + } + + /* No matches. */ + return 1; +} + +void +set_typedecl_interface_info (prev, vars) + tree prev, vars; +{ + tree id = get_time_identifier (DECL_SOURCE_FILE (vars)); + tree fileinfo = IDENTIFIER_CLASS_VALUE (id); + tree type = TREE_TYPE (vars); + + CLASSTYPE_INTERFACE_ONLY (type) = TREE_INT_CST_LOW (fileinfo) + = interface_strcmp (DECL_SOURCE_FILE (vars)); +} + +void +set_vardecl_interface_info (prev, vars) + tree prev, vars; +{ + tree type = DECL_CONTEXT (vars); + + if (CLASSTYPE_INTERFACE_KNOWN (type)) + { + if (CLASSTYPE_INTERFACE_ONLY (type)) + set_typedecl_interface_info (prev, TYPE_NAME (type)); + else + CLASSTYPE_VTABLE_NEEDS_WRITING (type) = 1; + DECL_EXTERNAL (vars) = CLASSTYPE_INTERFACE_ONLY (type); + TREE_PUBLIC (vars) = 1; + } +} + +/* Called from the top level: if there are any pending inlines to + do, set up to process them now. This function sets up the first function + to be parsed; after it has been, the rule for fndef in cp-parse.y will + call process_next_inline to start working on the next one. */ +void +do_pending_inlines () +{ + struct pending_inline *prev = 0, *tail; + struct pending_inline *t; + + /* Oops, we're still dealing with the last batch. */ + if (yychar == PRE_PARSED_FUNCTION_DECL) + return; + + /* Reverse the pending inline functions, since + they were cons'd instead of appended. */ + + for (t = pending_inlines; t; t = tail) + { + t->deja_vu = 1; + tail = t->next; + t->next = prev; + prev = t; + } + /* Reset to zero so that if the inline functions we are currently + processing define inline functions of their own, that is handled + correctly. ??? This hasn't been checked in a while. */ + pending_inlines = 0; + + /* Now start processing the first inline function. */ + t = prev; + my_friendly_assert ((t->parm_vec == NULL_TREE) == (t->bindings == NULL_TREE), + 226); + if (t->parm_vec) + push_template_decls (t->parm_vec, t->bindings, 0); + if (t->len > 0) + { + feed_input (t->buf, t->len, t->can_free ? &inline_text_obstack : 0); + lineno = t->lineno; +#if 0 + if (input_filename != t->filename) + { + input_filename = t->filename; + /* Get interface/implementation back in sync. */ + extract_interface_info (); + } +#else + input_filename = t->filename; + interface_unknown = t->interface == 1; + interface_only = t->interface == 0; +#endif + yychar = PRE_PARSED_FUNCTION_DECL; + } + /* Pass back a handle on the rest of the inline functions, so that they + can be processed later. */ + yylval.ttype = build_tree_list ((tree) t, t->fndecl); + if (flag_default_inline && t->fndecl + /* If we're working from a template, don't change + the `inline' state. */ + && t->parm_vec == NULL_TREE) + DECL_INLINE (t->fndecl) = 1; + DECL_PENDING_INLINE_INFO (t->fndecl) = 0; +} + +extern struct pending_input *to_be_restored; +static int nextchar = -1; + +/* Called from the fndecl rule in the parser when the function just parsed + was declared using a PRE_PARSED_FUNCTION_DECL (i.e. came from + do_pending_inlines). */ +void +process_next_inline (t) + tree t; +{ + struct pending_inline *i = (struct pending_inline *) TREE_PURPOSE (t); + my_friendly_assert ((i->parm_vec == NULL_TREE) == (i->bindings == NULL_TREE), + 227); + if (i->parm_vec) + pop_template_decls (i->parm_vec, i->bindings, 0); + i = i->next; + if (yychar == YYEMPTY) + yychar = yylex (); + if (yychar != END_OF_SAVED_INPUT) + { + error ("parse error at end of saved function text"); + /* restore_pending_input will abort unless yychar is either + * END_OF_SAVED_INPUT or YYEMPTY; since we already know we're + * hosed, feed back YYEMPTY. + * We also need to discard nextchar, since that may have gotten + * set as well. + */ + nextchar = -1; + } + yychar = YYEMPTY; + if (to_be_restored == 0) + my_friendly_abort (123); + restore_pending_input (to_be_restored); + to_be_restored = 0; + if (i && i->fndecl != NULL_TREE) + { + my_friendly_assert ((i->parm_vec == NULL_TREE) == (i->bindings == NULL_TREE), + 228); + if (i->parm_vec) + push_template_decls (i->parm_vec, i->bindings, 0); + feed_input (i->buf, i->len, i->can_free ? &inline_text_obstack : 0); + lineno = i->lineno; + input_filename = i->filename; + yychar = PRE_PARSED_FUNCTION_DECL; + yylval.ttype = build_tree_list ((tree) i, i->fndecl); + if (flag_default_inline + /* If we're working from a template, don't change + the `inline' state. */ + && i->parm_vec == NULL_TREE) + DECL_INLINE (i->fndecl) = 1; + DECL_PENDING_INLINE_INFO (i->fndecl) = 0; + } + if (i) + { + interface_unknown = i->interface == 1; + interface_only = i->interface == 0; + } + else + extract_interface_info (); +} + +/* Since inline methods can refer to text which has not yet been seen, + we store the text of the method in a structure which is placed in the + DECL_PENDING_INLINE_INFO field of the FUNCTION_DECL. + After parsing the body of the class definition, the FUNCTION_DECL's are + scanned to see which ones have this field set. Those are then digested + one at a time. + + This function's FUNCTION_DECL will have a bit set in its common so + that we know to watch out for it. */ + +static void +consume_string (this_obstack, matching_char) + register struct obstack *this_obstack; + int matching_char; +{ + register int c; + int starting_lineno = lineno; + do + { + c = getch (); + if (c == EOF) + { + int save_lineno = lineno; + lineno = starting_lineno; + if (matching_char == '"') + error ("end of file encountered inside string constant"); + else + error ("end of file encountered inside character constant"); + lineno = save_lineno; + return; + } + if (c == '\\') + { + obstack_1grow (this_obstack, c); + c = getch (); + obstack_1grow (this_obstack, c); + + /* Make sure we continue the loop */ + c = 0; + continue; + } + if (c == '\n') + { + if (pedantic) + pedwarn ("ANSI C++ forbids newline in string constant"); + lineno++; + } + obstack_1grow (this_obstack, c); + } + while (c != matching_char); +} + +static int nextyychar = YYEMPTY; +static YYSTYPE nextyylval; + +struct pending_input { + int nextchar, yychar, nextyychar, eof; + YYSTYPE yylval, nextyylval; + struct obstack token_obstack; + int first_token; +}; + +struct pending_input * +save_pending_input () +{ + struct pending_input *p; + p = (struct pending_input *) xmalloc (sizeof (struct pending_input)); + p->nextchar = nextchar; + p->yychar = yychar; + p->nextyychar = nextyychar; + p->yylval = yylval; + p->nextyylval = nextyylval; + p->eof = end_of_file; + yychar = nextyychar = YYEMPTY; + nextchar = -1; + p->first_token = first_token; + p->token_obstack = token_obstack; + + first_token = 0; + gcc_obstack_init (&token_obstack); + end_of_file = 0; + return p; +} + +void +restore_pending_input (p) + struct pending_input *p; +{ + my_friendly_assert (nextchar == -1, 229); + nextchar = p->nextchar; + my_friendly_assert (yychar == YYEMPTY || yychar == END_OF_SAVED_INPUT, 230); + yychar = p->yychar; + my_friendly_assert (nextyychar == YYEMPTY, 231); + nextyychar = p->nextyychar; + yylval = p->yylval; + nextyylval = p->nextyylval; + first_token = p->first_token; + obstack_free (&token_obstack, (char *) 0); + token_obstack = p->token_obstack; + end_of_file = p->eof; + free (p); +} + +/* Return next non-whitespace input character, which may come + from `finput', or from `nextchar'. */ +static int +yynextch () +{ + int c; + + if (nextchar >= 0) + { + c = nextchar; + nextchar = -1; + } + else c = getch (); + return skip_white_space (c); +} + +/* Unget character CH from the input stream. + If RESCAN is non-zero, then we want to `see' this + character as the next input token. */ +void +yyungetc (ch, rescan) + int ch; + int rescan; +{ + /* Unget a character from the input stream. */ + if (yychar == YYEMPTY || rescan == 0) + { + if (nextchar >= 0) + put_back (nextchar); + nextchar = ch; + } + else + { + my_friendly_assert (nextyychar == YYEMPTY, 232); + nextyychar = yychar; + nextyylval = yylval; + yychar = ch; + } +} + +/* This function stores away the text for an inline function that should + be processed later. It decides how much later, and may need to move + the info between obstacks; therefore, the caller should not refer to + the T parameter after calling this function. + + This function also stores the list of template-parameter bindings that + will be needed for expanding the template, if any. */ + +static void +store_pending_inline (decl, t) + tree decl; + struct pending_inline *t; +{ + extern int processing_template_defn; + int delay_to_eof = 0; + struct pending_inline **inlines; + + t->fndecl = decl; + /* Default: compile right away, and no extra bindings are needed. */ + t->parm_vec = t->bindings = 0; + if (processing_template_defn) + { + tree type = current_class_type; + /* Assumption: In this (possibly) nested class sequence, only + one name will have template parms. */ + while (type && TREE_CODE_CLASS (TREE_CODE (type)) == 't') + { + tree decl = TYPE_NAME (type); + tree tmpl = IDENTIFIER_TEMPLATE (DECL_NAME (decl)); + if (tmpl) + { + t->parm_vec = DECL_TEMPLATE_INFO (TREE_PURPOSE (tmpl))->parm_vec; + t->bindings = TREE_VALUE (tmpl); + } + type = DECL_CONTEXT (decl); + } + if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE + || TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE) + { + if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE) + my_friendly_assert (TYPE_MAX_VALUE (TREE_TYPE (decl)) == current_class_type, + 233); + + /* Inline functions can be compiled immediately. Other functions + will be output separately, so if we're in interface-only mode, + punt them now, or output them now if we're doing implementations + and we know no overrides will exist. Otherwise, we delay until + end-of-file, to see if the definition is really required. */ + if (DECL_INLINE (decl)) + /* delay_to_eof == 0 */; + else if (current_class_type && !interface_unknown) + { + if (interface_only) + { +#if 0 + print_node_brief (stderr, "\ndiscarding text for ", decl, 0); +#endif + if (t->can_free) + obstack_free (&inline_text_obstack, t->buf); + DECL_PENDING_INLINE_INFO (decl) = 0; + return; + } + } + /* Don't delay the processing of virtual functions. */ + else if (DECL_VINDEX (decl) == NULL_TREE) + delay_to_eof = 1; + } + else + my_friendly_abort (58); + } + + if (delay_to_eof) + { + extern struct pending_inline *pending_template_expansions; + + if (t->can_free) + { + char *free_to = t->buf; + t->buf = (char *) obstack_copy (&permanent_obstack, t->buf, + t->len + 1); + t = (struct pending_inline *) obstack_copy (&permanent_obstack, + (char *)t, sizeof (*t)); + obstack_free (&inline_text_obstack, free_to); + } + inlines = &pending_template_expansions; + t->can_free = 0; + } + else + { + inlines = &pending_inlines; + DECL_PENDING_INLINE_INFO (decl) = t; + } + + /* Because we use obstacks, we must process these in precise order. */ + t->next = *inlines; + *inlines = t; +} + +void reinit_parse_for_block (); + +void +reinit_parse_for_method (yychar, decl) + int yychar; + tree decl; +{ + int len; + int starting_lineno = lineno; + char *starting_filename = input_filename; + + reinit_parse_for_block (yychar, &inline_text_obstack, 0); + + len = obstack_object_size (&inline_text_obstack); + current_base_init_list = NULL_TREE; + current_member_init_list = NULL_TREE; + if (decl == void_type_node + || (current_class_type && TYPE_REDEFINED (current_class_type))) + { + /* Happens when we get two declarations of the same + function in the same scope. */ + char *buf = obstack_finish (&inline_text_obstack); + obstack_free (&inline_text_obstack, buf); + return; + } + else + { + struct pending_inline *t; + char *buf = obstack_finish (&inline_text_obstack); + + t = (struct pending_inline *) obstack_alloc (&inline_text_obstack, + sizeof (struct pending_inline)); + t->lineno = starting_lineno; + t->filename = starting_filename; + t->token = YYEMPTY; + t->token_value = 0; + t->buf = buf; + t->len = len; + t->can_free = 1; + t->deja_vu = 0; + if (interface_unknown && processing_template_defn && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (decl)) + warn_if_unknown_interface (); + t->interface = (interface_unknown ? 1 : (interface_only ? 0 : 2)); + store_pending_inline (decl, t); + } +} + +/* Consume a block -- actually, a method or template definition beginning + with `:' or `{' -- and save it away on the specified obstack. + + Argument IS_TEMPLATE indicates which set of error messages should be + output if something goes wrong. This should really be cleaned up somehow, + without loss of clarity. */ +void +reinit_parse_for_block (yychar, obstackp, is_template) + int yychar; + struct obstack *obstackp; + int is_template; +{ + register int c = 0; + int blev = 1; + int starting_lineno = lineno; + char *starting_filename = input_filename; + int len; + int look_for_semicolon = 0; + int look_for_lbrac = 0; + + if (yychar == '{') + obstack_1grow (obstackp, '{'); + else if (yychar == '=') + look_for_semicolon = 1; + else if (yychar != ':' && (yychar != RETURN || is_template)) + { + yyerror (is_template + ? "parse error in template specification" + : "parse error in method specification"); + obstack_1grow (obstackp, '{'); + } + else + { + obstack_1grow (obstackp, yychar); + look_for_lbrac = 1; + blev = 0; + } + + if (nextchar != EOF) + { + c = nextchar; + nextchar = EOF; + } + else + c = getch (); + + while (c != EOF) + { + int this_lineno = lineno; + + c = skip_white_space (c); + + /* Don't lose our cool if there are lots of comments. */ + if (lineno == this_lineno + 1) + obstack_1grow (obstackp, '\n'); + else if (lineno == this_lineno) + ; + else if (lineno - this_lineno < 10) + { + int i; + for (i = lineno - this_lineno; i > 0; i--) + obstack_1grow (obstackp, '\n'); + } + else + { + char buf[16]; + sprintf (buf, "\n# %d \"", lineno); + len = strlen (buf); + obstack_grow (obstackp, buf, len); + + len = strlen (input_filename); + obstack_grow (obstackp, input_filename, len); + obstack_1grow (obstackp, '\"'); + obstack_1grow (obstackp, '\n'); + } + + while (c > ' ') /* ASCII dependent... */ + { + obstack_1grow (obstackp, c); + if (c == '{') + { + look_for_lbrac = 0; + blev++; + } + else if (c == '}') + { + blev--; + if (blev == 0 && !look_for_semicolon) + goto done; + } + else if (c == '\\') + { + /* Don't act on the next character...e.g, doing an escaped + double-quote. */ + c = getch (); + if (c == EOF) + { + error_with_file_and_line (starting_filename, + starting_lineno, + "end of file read inside definition"); + goto done; + } + obstack_1grow (obstackp, c); + } + else if (c == '\"') + consume_string (obstackp, c); + else if (c == '\'') + consume_string (obstackp, c); + else if (c == ';') + { + if (look_for_lbrac) + { + error (is_template + ? "template body missing" + : "function body for constructor missing"); + obstack_1grow (obstackp, '{'); + obstack_1grow (obstackp, '}'); + len += 2; + goto done; + } + else if (look_for_semicolon && blev == 0) + goto done; + } + c = getch (); + } + + if (c == EOF) + { + error_with_file_and_line (starting_filename, + starting_lineno, + "end of file read inside definition"); + goto done; + } + else if (c != '\n') + { + obstack_1grow (obstackp, c); + c = getch (); + } + } + done: + obstack_1grow (obstackp, '\0'); +} + +/* Build a default function named NAME for type TYPE. + KIND says what to build. + + When KIND == 0, build default destructor. + When KIND == 1, build virtual destructor. + When KIND == 2, build default constructor. + When KIND == 3, build default X(const X&) constructor. + When KIND == 4, build default X(X&) constructor. + When KIND == 5, build default operator = (const X&). + When KIND == 6, build default operator = (X&). */ + +tree +cons_up_default_function (type, name, fields, kind) + tree type, name, fields; + int kind; +{ + extern tree void_list_node; + char *func_buf = NULL; + int func_len = 0; + tree declspecs = NULL_TREE; + tree fn, args; + tree argtype; + int retref = 0; + + name = constructor_name (name); + switch (kind) + { + /* Destructors. */ + case 1: + declspecs = build_decl_list (NULL_TREE, ridpointers [(int) RID_VIRTUAL]); + /* Fall through... */ + case 0: + name = build_parse_node (BIT_NOT_EXPR, name); + /* Fall through... */ + case 2: + /* Default constructor. */ + args = void_list_node; + { + if (declspecs) + declspecs = decl_tree_cons (NULL_TREE, + ridpointers [(int) RID_INLINE], + declspecs); + else + declspecs = build_decl_list (NULL_TREE, ridpointers [(int) RID_INLINE]); + } + break; + + case 3: + type = build_type_variant (type, 1, 0); + /* Fall through... */ + case 4: + /* According to ARM $12.8, the default copy ctor will be declared, but + not defined, unless it's needed. So we mark this as `inline'; that + way, if it's never used it won't be emitted. */ + declspecs = build_decl_list (NULL_TREE, ridpointers [(int) RID_INLINE]); + + argtype = build_reference_type (type); + args = tree_cons (NULL_TREE, + build_tree_list (hash_tree_chain (argtype, NULL_TREE), + get_identifier ("_ctor_arg")), + void_list_node); + default_copy_constructor_body (&func_buf, &func_len, type, fields); + break; + + case 5: + type = build_type_variant (type, 1, 0); + /* Fall through... */ + case 6: + retref = 1; + declspecs = + decl_tree_cons (NULL_TREE, name, + decl_tree_cons (NULL_TREE, + ridpointers [(int) RID_INLINE], + NULL_TREE)); + + name = ansi_opname [(int) MODIFY_EXPR]; + + argtype = build_reference_type (type); + args = tree_cons (NULL_TREE, + build_tree_list (hash_tree_chain (argtype, NULL_TREE), + get_identifier ("_ctor_arg")), + void_list_node); + default_assign_ref_body (&func_buf, &func_len, type, fields); + break; + + default: + my_friendly_abort (59); + } + + if (!func_buf) + { + func_len = 2; + func_buf = obstack_alloc (&inline_text_obstack, func_len); + strcpy (func_buf, "{}"); + } + + TREE_PARMLIST (args) = 1; + + { + tree declarator = build_parse_node (CALL_EXPR, name, args, NULL_TREE); + if (retref) + declarator = build_parse_node (ADDR_EXPR, declarator); + + fn = start_method (declspecs, declarator, NULL_TREE); + } + + if (fn == void_type_node) + return fn; + + current_base_init_list = NULL_TREE; + current_member_init_list = NULL_TREE; + + { + struct pending_inline *t; + + t = (struct pending_inline *) obstack_alloc (&inline_text_obstack, + sizeof (struct pending_inline)); + t->lineno = lineno; + +#if 1 + t->filename = input_filename; +#else /* This breaks; why? */ +#define MGMSG "(synthetic code at) " + t->filename = obstack_alloc (&inline_text_obstack, + strlen (input_filename) + sizeof (MGMSG) + 1); + strcpy (t->filename, MGMSG); + strcat (t->filename, input_filename); +#endif + t->token = YYEMPTY; + t->token_value = 0; + t->buf = func_buf; + t->len = func_len; + t->can_free = 1; + t->deja_vu = 0; + if (interface_unknown && processing_template_defn && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (fn)) + warn_if_unknown_interface (); + t->interface = (interface_unknown ? 1 : (interface_only ? 0 : 2)); + store_pending_inline (fn, t); + if (interface_unknown) + TREE_PUBLIC (fn) = 0; + else + { + TREE_PUBLIC (fn) = 1; + DECL_EXTERNAL (fn) = interface_only; + } + } + + finish_method (fn); + +#ifdef DEBUG_DEFAULT_FUNCTIONS + { char *fn_type = NULL; + tree t = name; + switch (kind) + { + case 0: fn_type = "default destructor"; break; + case 1: fn_type = "virtual destructor"; break; + case 2: fn_type = "default constructor"; break; + case 3: fn_type = "default X(const X&)"; break; + case 4: fn_type = "default X(X&)"; break; + } + if (fn_type) + { + if (TREE_CODE (name) == BIT_NOT_EXPR) + t = TREE_OPERAND (name, 0); + fprintf (stderr, "[[[[ %s for %s:\n%s]]]]\n", fn_type, + IDENTIFIER_POINTER (t), func_buf); + } + } +#endif /* DEBUG_DEFAULT_FUNCTIONS + + DECL_CLASS_CONTEXT (fn) = type; + + /* Show that this function was generated by the compiler. */ +#if 0 + DECL_SOURCE_LINE (fn) = 0; +#else + DECL_SYNTHESIZED (fn) = 1; +#endif + + return fn; +} + +/* Used by default_copy_constructor_body. For the anonymous union + in TYPE, return the member that is at least as large as the rest + of the members, so we can copy it. */ +static tree +largest_union_member (type) + tree type; +{ + tree f, type_size = TYPE_SIZE (type); + + for (f = TYPE_FIELDS (type); f; f = TREE_CHAIN (f)) + if (simple_cst_equal (DECL_SIZE (f), type_size)) + return f; + + /* We should always find one. */ + my_friendly_abort (323); +} + +/* Construct the body of a default assignment operator. + Mostly copied directly from default_copy_constructor_body. */ +static void +default_assign_ref_body (bufp, lenp, type, fields) + char **bufp; + int *lenp; + tree type, fields; +{ + static struct obstack body; + static int inited = FALSE; + int n_bases = CLASSTYPE_N_BASECLASSES (type); + char *tbuf; + int tgot, tneed; + + if (!inited) + { + obstack_init (&body); + inited = TRUE; + } + body.next_free = body.object_base; + + obstack_1grow (&body, '{'); + + /* Small buffer for sprintf(). */ + + tgot = 100; + tbuf = (char *) alloca (tgot); + + /* If we don't need a real op=, just do a bitwise copy. */ + if (! TYPE_HAS_COMPLEX_ASSIGN_REF (type)) + { + tbuf = "{__builtin_memcpy(this,&_ctor_arg,sizeof(_ctor_arg));return *this;}"; + *lenp = strlen (tbuf); + *bufp = obstack_alloc (&inline_text_obstack, *lenp + 1); + strcpy (*bufp, tbuf); + return; + } + + if (TREE_CODE (type) == UNION_TYPE) + { + if (fields) + { + tree main = fields; + char * s; + tree f; + + for (f = TREE_CHAIN (fields); f; f = TREE_CHAIN (f)) + if (tree_int_cst_lt (TYPE_SIZE (TREE_TYPE (main)), + TYPE_SIZE (TREE_TYPE (f)))) + main = f; + + s = IDENTIFIER_POINTER (DECL_NAME (main)); + + tneed = (2 * strlen (s)) + 28; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, "{%s=_ctor_arg.%s;return *this;}", s, s); + } + else + tbuf = "{}"; + + *lenp = strlen (tbuf); + *bufp = obstack_alloc (&inline_text_obstack, *lenp + 1); + strcpy (*bufp, tbuf); + return; + } + + /* Construct base classes... + FIXME: Does not deal with multiple inheritance and virtual bases + correctly. See g++.old-deja/g++.jason/opeq5.C for a testcase. + We need to do wacky things if everything between us and the virtual + base (by all paths) has a "complex" op=. */ + + if (n_bases) + { + tree bases = TYPE_BINFO_BASETYPES (type); + int i = 0; + + for (i = 0; i < n_bases; i++) + { + tree binfo = TREE_VEC_ELT (bases, i); + tree btype, name; + char *s, *p; + + btype = BINFO_TYPE (binfo); + name = TYPE_NESTED_NAME (btype); + if (!name) name = DECL_NAME(TYPE_NAME(btype)); + s = IDENTIFIER_POINTER (name); + + tneed = (2 * strlen (s)) + 33; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, "%s::operator=((%s%s&)_ctor_arg);", s, + TYPE_READONLY (type) ? "const " : "", s); + obstack_grow (&body, tbuf, strlen (tbuf)); + } + } + + /* Construct fields. */ + + if (fields) + { + tree f; + + for (f = fields; f; f = TREE_CHAIN (f)) + { + if (TREE_CODE (f) == FIELD_DECL && ! DECL_VIRTUAL_P (f)) + { + char *s, *p; + tree x; + tree t = TREE_TYPE (f); + + if (DECL_NAME (f)) + x = f; + else if (t != NULL_TREE + && TREE_CODE (t) == UNION_TYPE + && ((TREE_CODE (TYPE_NAME (t)) == IDENTIFIER_NODE + && ANON_AGGRNAME_P (TYPE_NAME (t))) + || (TREE_CODE (TYPE_NAME (t)) == TYPE_DECL + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))) + && TYPE_FIELDS (t) != NULL_TREE) + x = largest_union_member (t); + else + continue; + + s = IDENTIFIER_POINTER (DECL_NAME (x)); + tneed = (2 * strlen (s)) + 13; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, "%s=_ctor_arg.%s;", s, s); + obstack_grow (&body, tbuf, strlen (tbuf)); + } + } + } + + obstack_grow (&body, "return *this;}", 15); + + *lenp = obstack_object_size (&body) - 1; + *bufp = obstack_alloc (&inline_text_obstack, *lenp); + + strcpy (*bufp, body.object_base); +} + +/* Construct the body of a default copy constructor. */ +static void +default_copy_constructor_body (bufp, lenp, type, fields) + char **bufp; + int *lenp; + tree type, fields; +{ + static struct obstack prologue; + static int inited = FALSE; + int n_bases = CLASSTYPE_N_BASECLASSES (type); + char sep = ':'; + char *tbuf; + int tgot, tneed; + + /* Create a buffer to call base class constructors and construct members + (fields). */ + + if (!inited) + { + obstack_init (&prologue); + inited = TRUE; + } + prologue.next_free = prologue.object_base; + + /* If we don't need a real copy ctor, just do a bitwise copy. */ + if (! TYPE_HAS_COMPLEX_INIT_REF (type)) + { + tbuf = "{__builtin_memcpy(this,&_ctor_arg,sizeof(_ctor_arg));}"; + *lenp = strlen (tbuf); + *bufp = obstack_alloc (&inline_text_obstack, *lenp + 1); + strcpy (*bufp, tbuf); + return; + } + + /* Small buffer for sprintf(). */ + + tgot = 100; + tbuf = (char *) alloca (tgot); + + if (TREE_CODE (type) == UNION_TYPE) + { + if (fields) + { + tree main = fields; + char * s; + tree f; + + for (f = TREE_CHAIN (fields); f; f = TREE_CHAIN (f)) + if (tree_int_cst_lt (TYPE_SIZE (TREE_TYPE (main)), + TYPE_SIZE (TREE_TYPE (f)))) + main = f; + + s = IDENTIFIER_POINTER (DECL_NAME (main)); + tneed = (2 * strlen (s)) + 16; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, ":%s(_ctor_arg.%s){}", s, s); + } + else + tbuf = "{}"; + + *lenp = strlen (tbuf); + *bufp = obstack_alloc (&inline_text_obstack, *lenp + 1); + strcpy (*bufp, tbuf); + return; + } + + /* Construct base classes... */ + + if (n_bases) + { + /* Note that CLASSTYPE_VBASECLASSES isn't set yet... */ + tree v = get_vbase_types (type); + tree bases = TYPE_BINFO_BASETYPES (type); + int i = 0; + + for (;;) + { + tree binfo, btype, name; + char *s, *p; + + if (v) + { + binfo = v; + v = TREE_CHAIN (v); + } + else if (i < n_bases) + { + binfo = TREE_VEC_ELT (bases, i++); + if (TREE_VIA_VIRTUAL (binfo)) + continue; + } + else + break; + + btype = BINFO_TYPE (binfo); + name = TYPE_NESTED_NAME (btype); + if (!name) name = DECL_NAME(TYPE_NAME(btype)); + s = IDENTIFIER_POINTER (name); + + tneed = (2 * strlen (s)) + 30; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, "%c%s((%s%s&)_ctor_arg)", sep, s, + TYPE_READONLY (type) ? "const " : "", s); + sep = ','; + obstack_grow (&prologue, tbuf, strlen (tbuf)); + } + } + + /* Construct fields. */ + + if (fields) + { + tree f; + + for (f = fields; f; f = TREE_CHAIN (f)) + { + if (TREE_CODE (f) == FIELD_DECL && ! DECL_VIRTUAL_P (f)) + { + char *s, *p; + tree x; + tree t = TREE_TYPE (f); + + if (DECL_NAME (f)) + x = f; + else if (t != NULL_TREE + && TREE_CODE (t) == UNION_TYPE + && ((TREE_CODE (TYPE_NAME (t)) == IDENTIFIER_NODE + && ANON_AGGRNAME_P (TYPE_NAME (t))) + || (TREE_CODE (TYPE_NAME (t)) == TYPE_DECL + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))) + && TYPE_FIELDS (t) != NULL_TREE) + x = largest_union_member (t); + else + continue; + + s = IDENTIFIER_POINTER (DECL_NAME (x)); + tneed = (2 * strlen (s)) + 30; + if (tgot < tneed) + { + tgot = tneed; + tbuf = (char *) alloca (tgot); + } + + sprintf (tbuf, "%c%s(_ctor_arg.%s)", sep, s, s); + sep = ','; + obstack_grow (&prologue, tbuf, strlen (tbuf)); + } + } + } + + /* Concatenate constructor body to prologue. */ + + *lenp = obstack_object_size (&prologue) + 2; + *bufp = obstack_alloc (&inline_text_obstack, *lenp + 1); + + obstack_1grow (&prologue, '\0'); + + strcpy (*bufp, prologue.object_base); + strcat (*bufp, "{}"); +} + +/* Heuristic to tell whether the user is missing a semicolon + after a struct or enum declaration. Emit an error message + if we know the user has blown it. */ +void +check_for_missing_semicolon (type) + tree type; +{ + if (yychar < 0) + yychar = yylex (); + + if (yychar > 255 + && yychar != SCSPEC + && yychar != IDENTIFIER + && yychar != TYPENAME) + { + if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (type))) + error ("semicolon missing after %s declaration", + TREE_CODE (type) == ENUMERAL_TYPE ? "enum" : "struct"); + else + error ("semicolon missing after declaration of `%s'", + TYPE_NAME_STRING (type)); + shadow_tag (build_tree_list (0, type)); + } + /* Could probably also hack cases where class { ... } f (); appears. */ + clear_anon_tags (); +} + +void +note_got_semicolon (type) + tree type; +{ + if (TREE_CODE_CLASS (TREE_CODE (type)) != 't') + my_friendly_abort (60); + if (IS_AGGR_TYPE (type)) + CLASSTYPE_GOT_SEMICOLON (type) = 1; +} + +void +note_list_got_semicolon (declspecs) + tree declspecs; +{ + tree link; + + for (link = declspecs; link; link = TREE_CHAIN (link)) + { + tree type = TREE_VALUE (link); + if (TREE_CODE_CLASS (TREE_CODE (type)) == 't') + note_got_semicolon (type); + } + clear_anon_tags (); +} + +/* If C is not whitespace, return C. + Otherwise skip whitespace and return first nonwhite char read. */ + +static int +skip_white_space (c) + register int c; +{ + for (;;) + { + switch (c) + { + case '\n': + c = check_newline (); + break; + + case ' ': + case '\t': + case '\f': + case '\r': + case '\v': + case '\b': + do + c = getch (); + while (c == ' ' || c == '\t'); + break; + + case '\\': + c = getch (); + if (c == '\n') + lineno++; + else + error ("stray '\\' in program"); + c = getch (); + break; + + default: + return (c); + } + } +} + + + +/* Make the token buffer longer, preserving the data in it. + P should point to just beyond the last valid character in the old buffer. + The value we return is a pointer to the new buffer + at a place corresponding to P. */ + +static char * +extend_token_buffer (p) + char *p; +{ + int offset = p - token_buffer; + + maxtoken = maxtoken * 2 + 10; + token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2); + + return token_buffer + offset; +} + +static int +get_last_nonwhite_on_line () +{ + register int c; + + /* Is this the last nonwhite stuff on the line? */ + if (nextchar >= 0) + c = nextchar, nextchar = -1; + else + c = getch (); + + while (c == ' ' || c == '\t') + c = getch (); + return c; +} + +/* At the beginning of a line, increment the line number + and process any #-directive on this line. + If the line is a #-directive, read the entire line and return a newline. + Otherwise, return the line's first non-whitespace character. */ + +int +check_newline () +{ + register int c; + register int token; + + lineno++; + + /* Read first nonwhite char on the line. */ + + do + c = getch (); + while (c == ' ' || c == '\t'); + + if (c != '#') + { + /* If not #, return it so caller will use it. */ + return c; + } + + /* Read first nonwhite char after the `#'. */ + + do + c = getch (); + while (c == ' ' || c == '\t'); + + /* If a letter follows, then if the word here is `line', skip + it and ignore it; otherwise, ignore the line, with an error + if the word isn't `pragma'. */ + + if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) + { + if (c == 'p') + { + if (getch () == 'r' + && getch () == 'a' + && getch () == 'g' + && getch () == 'm' + && getch () == 'a') + { + /* Read first nonwhite char after the `#pragma'. */ + + do + c = getch (); + while (c == ' ' || c == '\t'); + + if (c == 'v' + && getch () == 't' + && getch () == 'a' + && getch () == 'b' + && getch () == 'l' + && getch () == 'e' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { + extern tree pending_vtables; + + /* More follows: it must be a string constant (class name). */ + token = real_yylex (); + if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) + { + error ("invalid #pragma vtable"); + goto skipline; + } + if (write_virtuals != 2) + { + warning ("use `+e2' option to enable #pragma vtable"); + goto skipline; + } + pending_vtables = perm_tree_cons (NULL_TREE, get_identifier (TREE_STRING_POINTER (yylval.ttype)), pending_vtables); + if (nextchar < 0) + nextchar = getch (); + c = nextchar; + if (c != '\n') + warning ("trailing characters ignored"); + } + else if (c == 'u' + && getch () == 'n' + && getch () == 'i' + && getch () == 't' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { + /* More follows: it must be a string constant (unit name). */ + token = real_yylex (); + if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) + { + error ("invalid #pragma unit"); + goto skipline; + } + current_unit_name = get_identifier (TREE_STRING_POINTER (yylval.ttype)); + current_unit_language = current_lang_name; + if (nextchar < 0) + nextchar = getch (); + c = nextchar; + if (c != '\n') + warning ("trailing characters ignored"); + } + else if (c == 'i') + { + tree fileinfo = IDENTIFIER_CLASS_VALUE (get_time_identifier (input_filename)); + c = getch (); + + if (c == 'n' + && getch () == 't' + && getch () == 'e' + && getch () == 'r' + && getch () == 'f' + && getch () == 'a' + && getch () == 'c' + && getch () == 'e' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { + int warned_interface = 0; + + /* Read to newline. */ + + while (c != '\n') + { + c = getch (); + if (!warned_interface && extra_warnings + && c != ' ' && c != '\t' && c != '\n') + { + warning ("garbage after `#pragma interface' ignored"); + warned_interface = 1; + } + } + + write_virtuals = 3; + + if (impl_file_chain == 0) + { + char *filename; + tree fi; + + /* If this is zero at this point, then we are + auto-implementing. */ + if (main_input_filename == 0) + main_input_filename = input_filename; + + filename = FILE_NAME_NONDIRECTORY (main_input_filename); + fi = get_time_identifier (filename); + fi = IDENTIFIER_CLASS_VALUE (fi); + TREE_INT_CST_LOW (fi) = 0; + TREE_INT_CST_HIGH (fi) = 1; + /* Get default. */ + impl_file_chain = (struct impl_files *)permalloc (sizeof (struct impl_files)); + impl_file_chain->filename = filename; + impl_file_chain->next = 0; + } + + interface_only = interface_strcmp (input_filename); + interface_unknown = 0; + TREE_INT_CST_LOW (fileinfo) = interface_only; + TREE_INT_CST_HIGH (fileinfo) = interface_unknown; + } + else if (c == 'm' + && getch () == 'p' + && getch () == 'l' + && getch () == 'e' + && getch () == 'm' + && getch () == 'e' + && getch () == 'n' + && getch () == 't' + && getch () == 'a' + && getch () == 't' + && getch () == 'i' + && getch () == 'o' + && getch () == 'n' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { + char *main_filename = main_input_filename ? main_input_filename : input_filename; + + while (c == ' ' || c == '\t') + c = getch (); + if (c != '\n') + { + put_back (c); + token = real_yylex (); + if (token != STRING + || TREE_CODE (yylval.ttype) != STRING_CST) + { + error ("invalid `#pragma implementation'"); + goto skipline; + } + main_filename = TREE_STRING_POINTER (yylval.ttype); + } + main_filename = FILE_NAME_NONDIRECTORY (main_filename); + + /* read to newline. */ + while (c != '\n') + c = getch (); + + if (write_virtuals == 3) + { + struct impl_files *ifiles = impl_file_chain; + while (ifiles) + { + if (! strcmp (ifiles->filename, main_filename)) + break; + ifiles = ifiles->next; + } + if (ifiles == 0) + { + ifiles = (struct impl_files*) permalloc (sizeof (struct impl_files)); + ifiles->filename = main_filename; + ifiles->next = impl_file_chain; + impl_file_chain = ifiles; + } + } + else if ((main_input_filename != 0 + && ! strcmp (main_input_filename, input_filename)) + || ! strcmp (input_filename, main_filename)) + { + write_virtuals = 3; + if (impl_file_chain == 0) + { + impl_file_chain = (struct impl_files*) permalloc (sizeof (struct impl_files)); + impl_file_chain->filename = main_filename; + impl_file_chain->next = 0; + } + } + else + error ("`#pragma implementation' can only appear at top-level"); + interface_only = 0; + /* We make this non-zero so that we infer decl linkage + in the impl file only for variables first declared + in the interface file. */ + interface_unknown = 1; + TREE_INT_CST_LOW (fileinfo) = interface_only; + TREE_INT_CST_HIGH (fileinfo) = interface_unknown; + } + } + } + goto skipline; + } + else if (c == 'd') + { + if (getch () == 'e' + && getch () == 'f' + && getch () == 'i' + && getch () == 'n' + && getch () == 'e' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { +#ifdef DWARF_DEBUGGING_INFO + if ((debug_info_level == DINFO_LEVEL_VERBOSE) + && (write_symbols == DWARF_DEBUG)) + dwarfout_define (lineno, get_directive_line (finput)); +#endif /* DWARF_DEBUGGING_INFO */ + goto skipline; + } + } + else if (c == 'u') + { + if (getch () == 'n' + && getch () == 'd' + && getch () == 'e' + && getch () == 'f' + && ((c = getch ()) == ' ' || c == '\t' || c == '\n')) + { +#ifdef DWARF_DEBUGGING_INFO + if ((debug_info_level == DINFO_LEVEL_VERBOSE) + && (write_symbols == DWARF_DEBUG)) + dwarfout_undef (lineno, get_directive_line (finput)); +#endif /* DWARF_DEBUGGING_INFO */ + goto skipline; + } + } + else if (c == 'l') + { + if (getch () == 'i' + && getch () == 'n' + && getch () == 'e' + && ((c = getch ()) == ' ' || c == '\t')) + goto linenum; + } + else if (c == 'i') + { + if (getch () == 'd' + && getch () == 'e' + && getch () == 'n' + && getch () == 't' + && ((c = getch ()) == ' ' || c == '\t')) + { +#ifdef ASM_OUTPUT_IDENT + extern FILE *asm_out_file; +#endif + /* #ident. The pedantic warning is now in cccp.c. */ + + /* Here we have just seen `#ident '. + A string constant should follow. */ + + while (c == ' ' || c == '\t') + c = getch (); + + /* If no argument, ignore the line. */ + if (c == '\n') + return c; + + put_back (c); + token = real_yylex (); + if (token != STRING + || TREE_CODE (yylval.ttype) != STRING_CST) + { + error ("invalid #ident"); + goto skipline; + } + + if (! flag_no_ident) + { +#ifdef ASM_OUTPUT_IDENT + ASM_OUTPUT_IDENT (asm_out_file, + TREE_STRING_POINTER (yylval.ttype)); +#endif + } + + /* Skip the rest of this line. */ + goto skipline; + } + } + else if (c == 'n') + { + if (getch () == 'e' + && getch () == 'w' + && getch () == 'w' + && getch () == 'o' + && getch () == 'r' + && getch () == 'l' + && getch () == 'd' + && ((c = getch ()) == ' ' || c == '\t')) + { + /* Used to test incremental compilation. */ + sorry ("#pragma newworld"); + goto skipline; + } + } + error ("undefined or invalid # directive"); + goto skipline; + } + +linenum: + /* Here we have either `#line' or `# <nonletter>'. + In either case, it should be a line number; a digit should follow. */ + + while (c == ' ' || c == '\t') + c = getch (); + + /* If the # is the only nonwhite char on the line, + just ignore it. Check the new newline. */ + if (c == '\n') + return c; + + /* Something follows the #; read a token. */ + + put_back (c); + token = real_yylex (); + + if (token == CONSTANT + && TREE_CODE (yylval.ttype) == INTEGER_CST) + { + int old_lineno = lineno; + enum { act_none, act_push, act_pop } action = act_none; + int entering_system_header = 0; + int entering_c_header = 0; + + /* subtract one, because it is the following line that + gets the specified number */ + + int l = TREE_INT_CST_LOW (yylval.ttype) - 1; + c = get_last_nonwhite_on_line (); + if (c == '\n') + { + /* No more: store the line number and check following line. */ + lineno = l; + return c; + } + put_back (c); + + /* More follows: it must be a string constant (filename). */ + + /* Read the string constant, but don't treat \ as special. */ + ignore_escape_flag = 1; + token = real_yylex (); + ignore_escape_flag = 0; + + if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST) + { + error ("invalid #line"); + goto skipline; + } + + /* Changing files again. This means currently collected time + is charged against header time, and body time starts back + at 0. */ + if (flag_detailed_statistics) + { + int this_time = my_get_run_time (); + tree time_identifier = get_time_identifier (TREE_STRING_POINTER (yylval.ttype)); + header_time += this_time - body_time; + TREE_INT_CST_LOW (IDENTIFIER_LOCAL_VALUE (this_filename_time)) + += this_time - body_time; + this_filename_time = time_identifier; + body_time = this_time; + } + + if (flag_cadillac) + cadillac_note_source (); + + input_filename + = (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1); + strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype)); + lineno = l; + GNU_xref_file (input_filename); + + if (main_input_filename == 0) + { + struct impl_files *ifiles = impl_file_chain; + + if (ifiles) + { + while (ifiles->next) + ifiles = ifiles->next; + ifiles->filename = FILE_NAME_NONDIRECTORY (input_filename); + } + + main_input_filename = input_filename; + if (write_virtuals == 3) + walk_vtables (set_typedecl_interface_info, set_vardecl_interface_info); + } + + extract_interface_info (); + + c = get_last_nonwhite_on_line (); + if (c != '\n') + { + put_back (c); + + token = real_yylex (); + + /* `1' after file name means entering new file. + `2' after file name means just left a file. */ + + if (token == CONSTANT + && TREE_CODE (yylval.ttype) == INTEGER_CST) + { + if (TREE_INT_CST_LOW (yylval.ttype) == 1) + action = act_push; + else if (TREE_INT_CST_LOW (yylval.ttype) == 2) + action = act_pop; + + if (action) + { + c = get_last_nonwhite_on_line (); + if (c != '\n') + { + put_back (c); + token = real_yylex (); + } + } + } + + /* `3' after file name means this is a system header file. */ + + if (token == CONSTANT + && TREE_CODE (yylval.ttype) == INTEGER_CST + && TREE_INT_CST_LOW (yylval.ttype) == 3) + { + entering_system_header = 1; + + c = get_last_nonwhite_on_line (); + if (c != '\n') + { + put_back (c); + token = real_yylex (); + } + } + + /* `4' after file name means this is a C header file. */ + + if (token == CONSTANT + && TREE_CODE (yylval.ttype) == INTEGER_CST + && TREE_INT_CST_LOW (yylval.ttype) == 4) + { + entering_c_header = 1; + + c = get_last_nonwhite_on_line (); + if (c != '\n') + { + put_back (c); + token = real_yylex (); + } + } + + /* Do the actions implied by the preceeding numbers. */ + + if (action == act_push) + { + /* Pushing to a new file. */ + struct file_stack *p; + + p = (struct file_stack *) xmalloc (sizeof (struct file_stack)); + input_file_stack->line = old_lineno; + p->next = input_file_stack; + p->name = input_filename; + input_file_stack = p; + input_file_stack_tick++; +#ifdef DWARF_DEBUGGING_INFO + if (debug_info_level == DINFO_LEVEL_VERBOSE + && write_symbols == DWARF_DEBUG) + dwarfout_start_new_source_file (input_filename); +#endif /* DWARF_DEBUGGING_INFO */ + if (flag_cadillac) + cadillac_push_source (); + in_system_header = entering_system_header; + if (c_header_level) + ++c_header_level; + else if (entering_c_header) + { + c_header_level = 1; + ++pending_lang_change; + } + } + else if (action == act_pop) + { + /* Popping out of a file. */ + if (input_file_stack->next) + { + struct file_stack *p; + + if (c_header_level && --c_header_level == 0) + { + if (entering_c_header) + warning ("Badly nested C headers from preprocessor"); + --pending_lang_change; + } + if (flag_cadillac) + cadillac_pop_source (); + in_system_header = entering_system_header; + + p = input_file_stack; + input_file_stack = p->next; + free (p); + input_file_stack_tick++; +#ifdef DWARF_DEBUGGING_INFO + if (debug_info_level == DINFO_LEVEL_VERBOSE + && write_symbols == DWARF_DEBUG) + dwarfout_resume_previous_source_file (input_file_stack->line); +#endif /* DWARF_DEBUGGING_INFO */ + } + else + error ("#-lines for entering and leaving files don't match"); + } + else + { + in_system_header = entering_system_header; + if (flag_cadillac) + cadillac_switch_source (-1); + } + } + + /* If NEXTCHAR is not end of line, we don't care what it is. */ + if (nextchar == '\n') + return '\n'; + } + else + error ("invalid #-line"); + + /* skip the rest of this line. */ + skipline: + if (c == '\n') + return c; + while ((c = getch ()) != EOF && c != '\n'); + return c; +} + +void +do_pending_lang_change () +{ + for (; pending_lang_change > 0; --pending_lang_change) + push_lang_context (lang_name_c); + for (; pending_lang_change < 0; ++pending_lang_change) + pop_lang_context (); +} + +#if 0 +#define isalnum(char) (char >= 'a' ? char <= 'z' : char >= '0' ? char <= '9' || (char >= 'A' && char <= 'Z') : 0) +#define isdigit(char) (char >= '0' && char <= '9') +#else +#include <ctype.h> +#endif + +#define ENDFILE -1 /* token that represents end-of-file */ + +/* Read an escape sequence, returning its equivalent as a character, + or store 1 in *ignore_ptr if it is backslash-newline. */ + +static int +readescape (ignore_ptr) + int *ignore_ptr; +{ + register int c = getch (); + register int code; + register unsigned count; + unsigned firstdig; + int nonnull; + + switch (c) + { + case 'x': + if (warn_traditional) + warning ("the meaning of `\\x' varies with -traditional"); + + if (flag_traditional) + return c; + + code = 0; + count = 0; + nonnull = 0; + while (1) + { + c = getch (); + if (! isxdigit (c)) + { + put_back (c); + break; + } + code *= 16; + if (c >= 'a' && c <= 'f') + code += c - 'a' + 10; + if (c >= 'A' && c <= 'F') + code += c - 'A' + 10; + if (c >= '0' && c <= '9') + code += c - '0'; + if (code != 0 || count != 0) + { + if (count == 0) + firstdig = code; + count++; + } + nonnull = 1; + } + if (! nonnull) + error ("\\x used with no following hex digits"); + else if (count == 0) + /* Digits are all 0's. Ok. */ + ; + else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node) + || (count > 1 + && ((1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4)) + <= firstdig))) + pedwarn ("hex escape out of range"); + return code; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': + code = 0; + count = 0; + while ((c <= '7') && (c >= '0') && (count++ < 3)) + { + code = (code * 8) + (c - '0'); + c = getch (); + } + put_back (c); + return code; + + case '\\': case '\'': case '"': + return c; + + case '\n': + lineno++; + *ignore_ptr = 1; + return 0; + + case 'n': + return TARGET_NEWLINE; + + case 't': + return TARGET_TAB; + + case 'r': + return TARGET_CR; + + case 'f': + return TARGET_FF; + + case 'b': + return TARGET_BS; + + case 'a': + if (warn_traditional) + warning ("the meaning of `\\a' varies with -traditional"); + + if (flag_traditional) + return c; + return TARGET_BELL; + + case 'v': + return TARGET_VT; + + case 'e': + case 'E': + if (pedantic) + pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c); + return 033; + + case '?': + return c; + + /* `\(', etc, are used at beginning of line to avoid confusing Emacs. */ + case '(': + case '{': + case '[': + /* `\%' is used to prevent SCCS from getting confused. */ + case '%': + if (pedantic) + pedwarn ("unknown escape sequence `\\%c'", c); + return c; + } + if (c >= 040 && c < 0177) + pedwarn ("unknown escape sequence `\\%c'", c); + else + pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c); + return c; +} + +/* Value is 1 if we should try to make the next identifier look like a + typename (when it may be a local variable or a class variable). + Value is 0 if we treat this name in a default fashion. + Value is -1 if we must not see a type name. */ +int looking_for_typename = 0; + +void +dont_see_typename () +{ + looking_for_typename = -1; + if (yychar == TYPENAME || yychar == PTYPENAME) + { + yychar = IDENTIFIER; + lastiddecl = 0; + } +} + +#ifdef __GNUC__ +extern __inline int identifier_type (); +__inline +#endif +int +identifier_type (decl) + tree decl; +{ + if (TREE_CODE (decl) == TEMPLATE_DECL + && DECL_TEMPLATE_IS_CLASS (decl)) + return PTYPENAME; + if (TREE_CODE (decl) != TYPE_DECL) + return IDENTIFIER; + return TYPENAME; +} + +void +see_typename () +{ + looking_for_typename = 0; + if (yychar == IDENTIFIER) + { + lastiddecl = lookup_name (yylval.ttype, -1); + if (lastiddecl == 0) + { + if (flag_labels_ok) + lastiddecl = IDENTIFIER_LABEL_VALUE (yylval.ttype); + } + else + yychar = identifier_type (lastiddecl); + } +} + +tree +do_identifier (token) + register tree token; +{ + register tree id = lastiddecl; + + if (yychar == YYEMPTY) + yychar = yylex (); + /* Scope class declarations before global + declarations. */ + if (id == IDENTIFIER_GLOBAL_VALUE (token) + && current_class_type != 0 + && TYPE_SIZE (current_class_type) == 0 + && TREE_CODE (current_class_type) != UNINSTANTIATED_P_TYPE) + { + /* Could be from one of the base classes. */ + tree field = lookup_field (current_class_type, token, 1, 0); + if (field == 0) + ; + else if (field == error_mark_node) + /* We have already generated the error message. + But we still want to return this value. */ + id = lookup_field (current_class_type, token, 0, 0); + else if (TREE_CODE (field) == VAR_DECL + || TREE_CODE (field) == CONST_DECL) + id = field; + else if (TREE_CODE (field) != FIELD_DECL) + my_friendly_abort (61); + else + { + cp_error ("invalid use of member `%D' from base class `%T'", field, + DECL_FIELD_CONTEXT (field)); + id = error_mark_node; + return id; + } + } + + if (!id || id == error_mark_node) + { + if (id == error_mark_node && current_class_type != NULL_TREE) + { + id = lookup_nested_field (token, 1); + /* In lookup_nested_field(), we marked this so we can gracefully + leave this whole mess. */ + if (id && id != error_mark_node && TREE_TYPE (id) == error_mark_node) + return id; + } + if (yychar == '(' || yychar == LEFT_RIGHT) + { + id = implicitly_declare (token); + } + else if (current_function_decl == 0) + { + cp_error ("`%D' was not declared in this scope", token); + id = error_mark_node; + } + else + { + if (IDENTIFIER_GLOBAL_VALUE (token) != error_mark_node + || IDENTIFIER_ERROR_LOCUS (token) != current_function_decl) + { + static int undeclared_variable_notice; + + cp_error ("`%D' undeclared (first use this function)", token); + + if (! undeclared_variable_notice) + { + error ("(Each undeclared identifier is reported only once"); + error ("for each function it appears in.)"); + undeclared_variable_notice = 1; + } + } + id = error_mark_node; + /* Prevent repeated error messages. */ + IDENTIFIER_GLOBAL_VALUE (token) = error_mark_node; + SET_IDENTIFIER_ERROR_LOCUS (token, current_function_decl); + } + } + /* TREE_USED is set in `hack_identifier'. */ + if (TREE_CODE (id) == CONST_DECL) + { + if (IDENTIFIER_CLASS_VALUE (token) == id) + { + /* Check access. */ + enum access_type access + = compute_access (TYPE_BINFO (current_class_type), id); + if (access == access_private) + cp_error ("enum `%D' is private", id); + /* protected is OK, since it's an enum of `this'. */ + } + id = DECL_INITIAL (id); + } + else + id = hack_identifier (id, token, yychar); + return id; +} + +tree +identifier_typedecl_value (node) + tree node; +{ + tree t, type; + type = IDENTIFIER_TYPE_VALUE (node); + if (type == NULL_TREE) + return NULL_TREE; +#define do(X) \ + { \ + t = (X); \ + if (t && TREE_CODE (t) == TYPE_DECL && TREE_TYPE (t) == type) \ + return t; \ + } + do (IDENTIFIER_LOCAL_VALUE (node)); + do (IDENTIFIER_CLASS_VALUE (node)); + do (IDENTIFIER_GLOBAL_VALUE (node)); +#undef do + /* Will this one ever happen? */ + if (TYPE_NAME (type)) + return TYPE_NAME (type); + + /* We used to do an internal error of 62 here, but instead we will + handle the return of a null appropriately in the callers. */ + return NULL_TREE; +} + +struct try_type +{ + tree *node_var; + char unsigned_flag; + char long_flag; + char long_long_flag; +}; + +struct try_type type_sequence[] = +{ + { &integer_type_node, 0, 0, 0}, + { &unsigned_type_node, 1, 0, 0}, + { &long_integer_type_node, 0, 1, 0}, + { &long_unsigned_type_node, 1, 1, 0}, + { &long_long_integer_type_node, 0, 1, 1}, + { &long_long_unsigned_type_node, 1, 1, 1} +}; + +int +real_yylex () +{ + register int c; + register int value; + int wide_flag = 0; + int dollar_seen = 0; + int i; + + if (nextchar >= 0) + c = nextchar, nextchar = -1; + else + c = getch (); + + /* Effectively do c = skip_white_space (c) + but do it faster in the usual cases. */ + while (1) + switch (c) + { + case ' ': + case '\t': + case '\f': + case '\v': + case '\b': + c = getch (); + break; + + case '\r': + /* Call skip_white_space so we can warn if appropriate. */ + + case '\n': + case '/': + case '\\': + c = skip_white_space (c); + default: + goto found_nonwhite; + } + found_nonwhite: + + token_buffer[0] = c; + token_buffer[1] = 0; + +/* yylloc.first_line = lineno; */ + + switch (c) + { + case EOF: + token_buffer[0] = '\0'; + end_of_file = 1; + if (input_redirected ()) + value = END_OF_SAVED_INPUT; + else if (do_pending_expansions ()) + /* this will set yychar for us */ + return yychar; + else + value = ENDFILE; + break; + + case '$': + if (dollars_in_ident) + { + dollar_seen = 1; + goto letter; + } + value = '$'; + goto done; + + case 'L': + /* Capital L may start a wide-string or wide-character constant. */ + { + register int c = getch (); + if (c == '\'') + { + wide_flag = 1; + goto char_constant; + } + if (c == '"') + { + wide_flag = 1; + goto string_constant; + } + put_back (c); + } + + case 'A': case 'B': case 'C': case 'D': case 'E': + case 'F': case 'G': case 'H': case 'I': case 'J': + case 'K': case 'M': case 'N': case 'O': + case 'P': case 'Q': case 'R': case 'S': case 'T': + case 'U': case 'V': case 'W': case 'X': case 'Y': + case 'Z': + case 'a': case 'b': case 'c': case 'd': case 'e': + case 'f': case 'g': case 'h': case 'i': case 'j': + case 'k': case 'l': case 'm': case 'n': case 'o': + case 'p': case 'q': case 'r': case 's': case 't': + case 'u': case 'v': case 'w': case 'x': case 'y': + case 'z': + case '_': + letter: + { + register char *p; + + p = token_buffer; + if (input == 0) + { + /* We know that `token_buffer' can hold at least on char, + so we install C immediately. + We may have to read the value in `putback_char', so call + `getch' once. */ + *p++ = c; + c = getch (); + + /* Make this run fast. We know that we are reading straight + from FINPUT in this case (since identifiers cannot straddle + input sources. */ + while (isalnum (c) || (c == '_') || c == '$') + { + if (c == '$' && ! dollars_in_ident) + break; + if (p >= token_buffer + maxtoken) + p = extend_token_buffer (p); + + *p++ = c; + c = getc (finput); + } + } + else + { + /* We know that `token_buffer' can hold at least on char, + so we install C immediately. */ + *p++ = c; + c = getch (); + + while (isalnum (c) || (c == '_') || c == '$') + { + if (c == '$' && ! dollars_in_ident) + break; + if (p >= token_buffer + maxtoken) + p = extend_token_buffer (p); + + *p++ = c; + c = getch (); + } + } + + *p = 0; + nextchar = c; + + value = IDENTIFIER; + yylval.itype = 0; + + /* Try to recognize a keyword. Uses minimum-perfect hash function */ + + { + register struct resword *ptr; + + if (ptr = is_reserved_word (token_buffer, p - token_buffer)) + { + if (ptr->rid) + { + tree old_ttype = ridpointers[(int) ptr->rid]; + + /* If this provides a type for us, then revert lexical + state to standard state. */ + if (TREE_CODE (old_ttype) == IDENTIFIER_NODE + && IDENTIFIER_GLOBAL_VALUE (old_ttype) != 0 + && TREE_CODE (IDENTIFIER_GLOBAL_VALUE (old_ttype)) == TYPE_DECL) + looking_for_typename = 0; + else if (ptr->token == AGGR || ptr->token == ENUM) + looking_for_typename = 1; + + /* Check if this is a language-type declaration. + Just glimpse the next non-white character. */ + nextchar = skip_white_space (nextchar); + if (nextchar == '"') + { + /* We are looking at a string. Complain + if the token before the string is no `extern'. + + Could cheat some memory by placing this string + on the temporary_, instead of the saveable_ + obstack. */ + + if (ptr->rid != RID_EXTERN) + error ("invalid modifier `%s' for language string", + ptr->name); + real_yylex (); + value = EXTERN_LANG_STRING; + yylval.ttype = get_identifier (TREE_STRING_POINTER (yylval.ttype)); + break; + } + if (ptr->token == VISSPEC) + { + switch (ptr->rid) + { + case RID_PUBLIC: + yylval.itype = access_public; + break; + case RID_PRIVATE: + yylval.itype = access_private; + break; + case RID_PROTECTED: + yylval.itype = access_protected; + break; + default: + my_friendly_abort (63); + } + } + else + yylval.ttype = old_ttype; + } + value = (int) ptr->token; + } + } + + /* If we did not find a keyword, look for an identifier + (or a typename). */ + + if (strcmp ("catch", token_buffer) == 0 + || strcmp ("throw", token_buffer) == 0 + || strcmp ("try", token_buffer) == 0) + pedwarn ("`catch', `throw', and `try' are all C++ reserved words"); + + if (value == IDENTIFIER || value == TYPESPEC) + GNU_xref_ref (current_function_decl, token_buffer); + + if (value == IDENTIFIER) + { + register tree tmp = get_identifier (token_buffer); + +#if !defined(VMS) && defined(JOINER) + /* Make sure that user does not collide with our internal + naming scheme. */ + if (JOINER == '$' + && dollar_seen + && (THIS_NAME_P (tmp) + || VPTR_NAME_P (tmp) + || DESTRUCTOR_NAME_P (tmp) + || VTABLE_NAME_P (tmp) + || TEMP_NAME_P (tmp) + || ANON_AGGRNAME_P (tmp) + || ANON_PARMNAME_P (tmp))) + warning ("identifier name `%s' conflicts with GNU C++ internal naming strategy", + token_buffer); +#endif + + yylval.ttype = tmp; + + /* A user-invisible read-only initialized variable + should be replaced by its value. We only handle strings + since that's the only case used in C (and C++). */ + /* Note we go right after the local value for the identifier + (e.g., __FUNCTION__ or __PRETTY_FUNCTION__). We used to + call lookup_name, but that could result in an error about + ambiguities. */ + tmp = IDENTIFIER_LOCAL_VALUE (yylval.ttype); + if (tmp != NULL_TREE + && TREE_CODE (tmp) == VAR_DECL + && DECL_IGNORED_P (tmp) + && TREE_READONLY (tmp) + && DECL_INITIAL (tmp) != NULL_TREE + && TREE_CODE (DECL_INITIAL (tmp)) == STRING_CST) + { + yylval.ttype = DECL_INITIAL (tmp); + value = STRING; + } + } + if (value == NEW && ! global_bindings_p ()) + { + looking_for_typename = 1; + value = NEW; + goto done; + } + } + break; + + case '.': + { + register int c1 = getch (); + token_buffer[0] = c; + token_buffer[1] = c1; + if (c1 == '*') + { + value = DOT_STAR; + token_buffer[2] = 0; + goto done; + } + if (c1 == '.') + { + c1 = getch (); + if (c1 == '.') + { + token_buffer[2] = c1; + token_buffer[3] = 0; + value = ELLIPSIS; + goto done; + } + nextchar = c1; + token_buffer[2] = '\0'; + value = RANGE; + goto done; + } + if (isdigit (c1)) + { + put_back (c1); + goto resume_numerical_scan; + } + nextchar = c1; + value = '.'; + token_buffer[1] = 0; + goto done; + } + case '0': case '1': + /* Optimize for most frequent case. */ + { + register int c1 = getch (); + if (! isalnum (c1) && c1 != '.') + { + /* Terminate string. */ + token_buffer[0] = c; + token_buffer[1] = 0; + if (c == '0') + yylval.ttype = integer_zero_node; + else + yylval.ttype = integer_one_node; + nextchar = c1; + value = CONSTANT; + goto done; + } + put_back (c1); + } + /* fall through... */ + case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + resume_numerical_scan: + { + register char *p; + int base = 10; + int count = 0; + int largest_digit = 0; + int numdigits = 0; + /* for multi-precision arithmetic, + we actually store only HOST_BITS_PER_CHAR bits in each part. + The number of parts is chosen so as to be sufficient to hold + the enough bits to fit into the two HOST_WIDE_INTs that contain + the integer value (this is always at least as many bits as are + in a target `long long' value, but may be wider). */ +#define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2 + 2) + int parts[TOTAL_PARTS]; + int overflow = 0; + + enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS} floatflag + = NOT_FLOAT; + + p = token_buffer; + *p++ = c; + + for (count = 0; count < TOTAL_PARTS; count++) + parts[count] = 0; + + if (c == '0') + { + *p++ = (c = getch ()); + if ((c == 'x') || (c == 'X')) + { + base = 16; + *p++ = (c = getch ()); + } + /* Leading 0 forces octal unless the 0 is the only digit. */ + else if (c >= '0' && c <= '9') + { + base = 8; + numdigits++; + } + else + numdigits++; + } + + /* Read all the digits-and-decimal-points. */ + + while (c == '.' + || (isalnum (c) && (c != 'l') && (c != 'L') + && (c != 'u') && (c != 'U') + && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F'))))) + { + if (c == '.') + { + if (base == 16) + error ("floating constant may not be in radix 16"); + if (floatflag == AFTER_POINT) + { + error ("malformed floating constant"); + floatflag = TOO_MANY_POINTS; + } + else + floatflag = AFTER_POINT; + + base = 10; + *p++ = c = getch (); + /* Accept '.' as the start of a floating-point number + only when it is followed by a digit. + Otherwise, unread the following non-digit + and use the '.' as a structural token. */ + if (p == token_buffer + 2 && !isdigit (c)) + { + if (c == '.') + { + c = getch (); + if (c == '.') + { + *p++ = '.'; + *p = '\0'; + value = ELLIPSIS; + goto done; + } + nextchar = c; + token_buffer[2] = '\0'; + value = RANGE; + goto done; + } + nextchar = c; + token_buffer[1] = '\0'; + value = '.'; + goto done; + } + } + else + { + /* It is not a decimal point. + It should be a digit (perhaps a hex digit). */ + + if (isdigit (c)) + { + c = c - '0'; + } + else if (base <= 10) + { + if (c == 'e' || c == 'E') + { + base = 10; + floatflag = AFTER_POINT; + break; /* start of exponent */ + } + error ("nondigits in number and not hexadecimal"); + c = 0; + } + else if (c >= 'a') + { + c = c - 'a' + 10; + } + else + { + c = c - 'A' + 10; + } + if (c >= largest_digit) + largest_digit = c; + numdigits++; + + for (count = 0; count < TOTAL_PARTS; count++) + { + parts[count] *= base; + if (count) + { + parts[count] + += (parts[count-1] >> HOST_BITS_PER_CHAR); + parts[count-1] + &= (1 << HOST_BITS_PER_CHAR) - 1; + } + else + parts[0] += c; + } + + /* If the extra highest-order part ever gets anything in it, + the number is certainly too big. */ + if (parts[TOTAL_PARTS - 1] != 0) + overflow = 1; + + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = (c = getch ()); + } + } + + if (numdigits == 0) + error ("numeric constant with no digits"); + + if (largest_digit >= base) + error ("numeric constant contains digits beyond the radix"); + + /* Remove terminating char from the token buffer and delimit the string */ + *--p = 0; + + if (floatflag != NOT_FLOAT) + { + tree type = double_type_node; + char f_seen = 0; + char l_seen = 0; + int garbage_chars = 0; + REAL_VALUE_TYPE value; + jmp_buf handler; + + /* Read explicit exponent if any, and put it in tokenbuf. */ + + if ((c == 'e') || (c == 'E')) + { + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = c; + c = getch (); + if ((c == '+') || (c == '-')) + { + *p++ = c; + c = getch (); + } + if (! isdigit (c)) + error ("floating constant exponent has no digits"); + while (isdigit (c)) + { + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = c; + c = getch (); + } + } + + *p = 0; + errno = 0; + + /* Convert string to a double, checking for overflow. */ + if (setjmp (handler)) + { + error ("floating constant out of range"); + value = dconst0; + } + else + { + set_float_handler (handler); + /* The second argument, machine_mode, of REAL_VALUE_ATOF + tells the desired precision of the binary result of + decimal-to-binary conversion. */ + + /* Read the suffixes to choose a data type. */ + switch (c) + { + case 'f': case 'F': + type = float_type_node; + value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); + garbage_chars = -1; + break; + + case 'l': case 'L': + type = long_double_type_node; + value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); + garbage_chars = -1; + break; + + default: + value = REAL_VALUE_ATOF (token_buffer, TYPE_MODE (type)); + } + set_float_handler (NULL_PTR); + } + if (pedantic + && (REAL_VALUE_ISINF (value) +#ifdef ERANGE + || (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT + && errno == ERANGE + /* ERANGE is also reported for underflow, so test the + value to distinguish overflow from that. */ + && (REAL_VALUES_LESS (dconst1, value) + || REAL_VALUES_LESS (value, dconstm1))) +#endif + )) + { + pedwarn ("floating point number exceeds range of `%s'", + IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)))); + } + /* Note: garbage_chars is -1 if first char is *not* garbage. */ + while (isalnum (c)) + { + if (c == 'f' || c == 'F') + { + if (f_seen) + error ("two `f's in floating constant"); + f_seen = 1; + } + if (c == 'l' || c == 'L') + { + if (l_seen) + error ("two `l's in floating constant"); + l_seen = 1; + } + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = c; + c = getch (); + garbage_chars++; + } + + if (garbage_chars > 0) + error ("garbage at end of number"); + + /* Create a node with determined type and value. */ + yylval.ttype = build_real (type, value); + + put_back (c); + *p = 0; + } + else + { + tree type; + HOST_WIDE_INT high, low; + int spec_unsigned = 0; + int spec_long = 0; + int spec_long_long = 0; + int bytes, warn; + + while (1) + { + if (c == 'u' || c == 'U') + { + if (spec_unsigned) + error ("two `u's in integer constant"); + spec_unsigned = 1; + } + else if (c == 'l' || c == 'L') + { + if (spec_long) + { + if (spec_long_long) + error ("three `l's in integer constant"); + else if (pedantic) + pedwarn ("ANSI C++ forbids long long integer constants"); + spec_long_long = 1; + } + spec_long = 1; + } + else + { + if (isalnum (c)) + { + error ("garbage at end of number"); + while (isalnum (c)) + { + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = c; + c = getch (); + } + } + break; + } + if (p >= token_buffer + maxtoken - 3) + p = extend_token_buffer (p); + *p++ = c; + c = getch (); + } + + put_back (c); + + /* If the constant is not long long and it won't fit in an + unsigned long, or if the constant is long long and won't fit + in an unsigned long long, then warn that the constant is out + of range. */ + + /* ??? This assumes that long long and long integer types are + a multiple of 8 bits. This better than the original code + though which assumed that long was exactly 32 bits and long + long was exactly 64 bits. */ + + if (spec_long_long) + bytes = TYPE_PRECISION (long_long_integer_type_node) / 8; + else + bytes = TYPE_PRECISION (long_integer_type_node) / 8; + + warn = overflow; + for (i = bytes; i < TOTAL_PARTS; i++) + if (parts[i]) + warn = 1; + if (warn) + pedwarn ("integer constant out of range"); + + /* This is simplified by the fact that our constant + is always positive. */ + high = low = 0; + + for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++) + { + high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT + / HOST_BITS_PER_CHAR)] + << (i * HOST_BITS_PER_CHAR)); + low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR); + } + + + yylval.ttype = build_int_2 (low, high); + TREE_TYPE (yylval.ttype) = long_long_unsigned_type_node; + +#if 0 + /* Find the first allowable type that the value fits in. */ + type = 0; + for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); + i++) + if (!(spec_long && !type_sequence[i].long_flag) + && !(spec_long_long && !type_sequence[i].long_long_flag) + && !(spec_unsigned && !type_sequence[i].unsigned_flag) + /* A hex or octal constant traditionally is unsigned. */ + && !(base != 10 && flag_traditional + && !type_sequence[i].unsigned_flag) + /* A decimal constant can't be unsigned int + unless explicitly specified. */ + && !(base == 10 && !spec_unsigned + && *type_sequence[i].node_var == unsigned_type_node)) + if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) + { + type = *type_sequence[i].node_var; + break; + } + if (flag_traditional && type == long_unsigned_type_node + && !spec_unsigned) + type = long_integer_type_node; + + if (type == 0) + { + type = long_long_integer_type_node; + warning ("integer constant out of range"); + } + + /* Warn about some cases where the type of a given constant + changes from traditional C to ANSI C. */ + if (warn_traditional) + { + tree other_type = 0; + + /* This computation is the same as the previous one + except that flag_traditional is used backwards. */ + for (i = 0; i < sizeof (type_sequence) / sizeof (type_sequence[0]); + i++) + if (!(spec_long && !type_sequence[i].long_flag) + && !(spec_long_long && !type_sequence[i].long_long_flag) + && !(spec_unsigned && !type_sequence[i].unsigned_flag) + /* A hex or octal constant traditionally is unsigned. */ + && !(base != 10 && !flag_traditional + && !type_sequence[i].unsigned_flag) + /* A decimal constant can't be unsigned int + unless explicitly specified. */ + && !(base == 10 && !spec_unsigned + && *type_sequence[i].node_var == unsigned_type_node)) + if (int_fits_type_p (yylval.ttype, *type_sequence[i].node_var)) + { + other_type = *type_sequence[i].node_var; + break; + } + if (!flag_traditional && type == long_unsigned_type_node + && !spec_unsigned) + type = long_integer_type_node; + + if (other_type != 0 && other_type != type) + { + if (flag_traditional) + warning ("type of integer constant would be different without -traditional"); + else + warning ("type of integer constant would be different with -traditional"); + } + } + +#else /* 1 */ + if (!spec_long && !spec_unsigned + && !(flag_traditional && base != 10) + && int_fits_type_p (yylval.ttype, integer_type_node)) + { +#if 0 + if (warn_traditional && base != 10) + warning ("small nondecimal constant becomes signed in ANSI C++"); +#endif + type = integer_type_node; + } + else if (!spec_long && (base != 10 || spec_unsigned) + && int_fits_type_p (yylval.ttype, unsigned_type_node)) + { + /* Nondecimal constants try unsigned even in traditional C. */ + type = unsigned_type_node; + } + + else if (!spec_unsigned && !spec_long_long + && int_fits_type_p (yylval.ttype, long_integer_type_node)) + type = long_integer_type_node; + + else if (! spec_long_long + && int_fits_type_p (yylval.ttype, + long_unsigned_type_node)) + { +#if 0 + if (warn_traditional && !spec_unsigned) + warning ("large integer constant becomes unsigned in ANSI C++"); +#endif + if (flag_traditional && !spec_unsigned) + type = long_integer_type_node; + else + type = long_unsigned_type_node; + } + + else if (! spec_unsigned + /* Verify value does not overflow into sign bit. */ + && TREE_INT_CST_HIGH (yylval.ttype) >= 0 + && int_fits_type_p (yylval.ttype, + long_long_integer_type_node)) + type = long_long_integer_type_node; + + else if (int_fits_type_p (yylval.ttype, + long_long_unsigned_type_node)) + { +#if 0 + if (warn_traditional && !spec_unsigned) + warning ("large nondecimal constant is unsigned in ANSI C++"); +#endif + + if (flag_traditional && !spec_unsigned) + type = long_long_integer_type_node; + else + type = long_long_unsigned_type_node; + } + + else + { + type = long_long_integer_type_node; + warning ("integer constant out of range"); + + if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type)) + warning ("decimal integer constant is so large that it is unsigned"); + } +#endif + + TREE_TYPE (yylval.ttype) = type; + *p = 0; + } + + value = CONSTANT; break; + } + + case '\'': + char_constant: + { + register int result = 0; + register int num_chars = 0; + unsigned width = TYPE_PRECISION (char_type_node); + int max_chars; + + if (wide_flag) + { + width = WCHAR_TYPE_SIZE; +#ifdef MULTIBYTE_CHARS + max_chars = MB_CUR_MAX; +#else + max_chars = 1; +#endif + } + else + max_chars = TYPE_PRECISION (integer_type_node) / width; + + while (1) + { + tryagain: + + c = getch (); + + if (c == '\'' || c == EOF) + break; + + if (c == '\\') + { + int ignore = 0; + c = readescape (&ignore); + if (ignore) + goto tryagain; + if (width < HOST_BITS_PER_INT + && (unsigned) c >= (1 << width)) + pedwarn ("escape sequence out of range for character"); +#ifdef MAP_CHARACTER + if (isprint (c)) + c = MAP_CHARACTER (c); +#endif + } + else if (c == '\n') + { + if (pedantic) + pedwarn ("ANSI C++ forbids newline in character constant"); + lineno++; + } +#ifdef MAP_CHARACTER + else + c = MAP_CHARACTER (c); +#endif + + num_chars++; + if (num_chars > maxtoken - 4) + extend_token_buffer (token_buffer); + + token_buffer[num_chars] = c; + + /* Merge character into result; ignore excess chars. */ + if (num_chars < max_chars + 1) + { + if (width < HOST_BITS_PER_INT) + result = (result << width) | (c & ((1 << width) - 1)); + else + result = c; + } + } + + token_buffer[num_chars + 1] = '\''; + token_buffer[num_chars + 2] = 0; + + if (c != '\'') + error ("malformatted character constant"); + else if (num_chars == 0) + error ("empty character constant"); + else if (num_chars > max_chars) + { + num_chars = max_chars; + error ("character constant too long"); + } + else if (num_chars != 1 && ! flag_traditional) + warning ("multi-character character constant"); + + /* If char type is signed, sign-extend the constant. */ + if (! wide_flag) + { + int num_bits = num_chars * width; + if (num_bits == 0) + /* We already got an error; avoid invalid shift. */ + yylval.ttype = build_int_2 (0, 0); + else if (TREE_UNSIGNED (char_type_node) + || ((result >> (num_bits - 1)) & 1) == 0) + yylval.ttype + = build_int_2 (result & ((unsigned HOST_WIDE_INT) ~0 + >> (HOST_BITS_PER_INT - num_bits)), + 0); + else + yylval.ttype + = build_int_2 (result | ~((unsigned HOST_WIDE_INT) ~0 + >> (HOST_BITS_PER_INT - num_bits)), + -1); + if (num_chars<=1) + TREE_TYPE (yylval.ttype) = char_type_node; + else + TREE_TYPE (yylval.ttype) = integer_type_node; + } + else + { +#ifdef MULTIBYTE_CHARS + /* Set the initial shift state and convert the next sequence. */ + result = 0; + /* In all locales L'\0' is zero and mbtowc will return zero, + so don't use it. */ + if (num_chars > 1 + || (num_chars == 1 && token_buffer[1] != '\0')) + { + wchar_t wc; + (void) mbtowc (NULL, NULL, 0); + if (mbtowc (& wc, token_buffer + 1, num_chars) == num_chars) + result = wc; + else + warning ("Ignoring invalid multibyte character"); + } +#endif + yylval.ttype = build_int_2 (result, 0); + TREE_TYPE (yylval.ttype) = wchar_type_node; + } + + value = CONSTANT; + break; + } + + case '"': + string_constant: + { + register char *p; + + c = getch (); + p = token_buffer + 1; + + while (c != '"' && c >= 0) + { + /* ignore_escape_flag is set for reading the filename in #line. */ + if (!ignore_escape_flag && c == '\\') + { + int ignore = 0; + c = readescape (&ignore); + if (ignore) + goto skipnewline; + if (!wide_flag + && TYPE_PRECISION (char_type_node) < HOST_BITS_PER_INT + && c >= ((unsigned) 1 << TYPE_PRECISION (char_type_node))) + pedwarn ("escape sequence out of range for character"); + } + else if (c == '\n') + { + if (pedantic) + pedwarn ("ANSI C++ forbids newline in string constant"); + lineno++; + } + + if (p == token_buffer + maxtoken) + p = extend_token_buffer (p); + *p++ = c; + + skipnewline: + c = getch (); + if (c == EOF) { + error("Unterminated string"); + break; + } + } + *p = 0; + + /* We have read the entire constant. + Construct a STRING_CST for the result. */ + + if (wide_flag) + { + /* If this is a L"..." wide-string, convert the multibyte string + to a wide character string. */ + char *widep = (char *) alloca ((p - token_buffer) * WCHAR_BYTES); + int len; + +#ifdef MULTIBYTE_CHARS + len = mbstowcs ((wchar_t *) widep, token_buffer + 1, p - token_buffer); + if (len < 0 || len >= (p - token_buffer)) + { + warning ("Ignoring invalid multibyte string"); + len = 0; + } + bzero (widep + (len * WCHAR_BYTES), WCHAR_BYTES); +#else + { + union { long l; char c[sizeof (long)]; } u; + int big_endian; + char *wp, *cp; + + /* Determine whether host is little or big endian. */ + u.l = 1; + big_endian = u.c[sizeof (long) - 1]; + wp = widep + (big_endian ? WCHAR_BYTES - 1 : 0); + + bzero (widep, (p - token_buffer) * WCHAR_BYTES); + for (cp = token_buffer + 1; cp < p; cp++) + *wp = *cp, wp += WCHAR_BYTES; + len = p - token_buffer - 1; + } +#endif + yylval.ttype = build_string ((len + 1) * WCHAR_BYTES, widep); + TREE_TYPE (yylval.ttype) = wchar_array_type_node; + } + else + { + yylval.ttype = build_string (p - token_buffer, token_buffer + 1); + TREE_TYPE (yylval.ttype) = char_array_type_node; + } + + *p++ = '"'; + *p = 0; + + value = STRING; break; + } + + case '+': + case '-': + case '&': + case '|': + case '<': + case '>': + case '*': + case '/': + case '%': + case '^': + case '!': + case '=': + { + register int c1; + + combine: + + switch (c) + { + case '+': + yylval.code = PLUS_EXPR; break; + case '-': + yylval.code = MINUS_EXPR; break; + case '&': + yylval.code = BIT_AND_EXPR; break; + case '|': + yylval.code = BIT_IOR_EXPR; break; + case '*': + yylval.code = MULT_EXPR; break; + case '/': + yylval.code = TRUNC_DIV_EXPR; break; + case '%': + yylval.code = TRUNC_MOD_EXPR; break; + case '^': + yylval.code = BIT_XOR_EXPR; break; + case LSHIFT: + yylval.code = LSHIFT_EXPR; break; + case RSHIFT: + yylval.code = RSHIFT_EXPR; break; + case '<': + yylval.code = LT_EXPR; break; + case '>': + yylval.code = GT_EXPR; break; + } + + token_buffer[1] = c1 = getch (); + token_buffer[2] = 0; + + if (c1 == '=') + { + switch (c) + { + case '<': + value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done; + case '>': + value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done; + case '!': + value = EQCOMPARE; yylval.code = NE_EXPR; goto done; + case '=': + value = EQCOMPARE; yylval.code = EQ_EXPR; goto done; + } + value = ASSIGN; goto done; + } + else if (c == c1) + switch (c) + { + case '+': + value = PLUSPLUS; goto done; + case '-': + value = MINUSMINUS; goto done; + case '&': + value = ANDAND; goto done; + case '|': + value = OROR; goto done; + case '<': + c = LSHIFT; + goto combine; + case '>': + c = RSHIFT; + goto combine; + } + else if ((c == '-') && (c1 == '>')) + { + nextchar = skip_white_space (getch ()); + if (nextchar == '*') + { + nextchar = -1; + value = POINTSAT_STAR; + } + else + value = POINTSAT; + goto done; + } + else if (c1 == '?' && (c == '<' || c == '>')) + { + token_buffer[3] = 0; + + c1 = getch (); + yylval.code = (c == '<' ? MIN_EXPR : MAX_EXPR); + if (c1 == '=') + { + /* <?= or >?= expression. */ + token_buffer[2] = c1; + value = ASSIGN; + } + else + { + value = MIN_MAX; + nextchar = c1; + } + if (pedantic) + error ("use of `operator %s' is not standard C++", + token_buffer); + goto done; + } + + nextchar = c1; + token_buffer[1] = 0; + + value = c; + goto done; + } + + case ':': + c = getch (); + if (c == ':') + { + token_buffer[1] = ':'; + token_buffer[2] = '\0'; + value = SCOPE; + yylval.itype = 1; + } + else + { + nextchar = c; + value = ':'; + } + break; + + case 0: + /* Don't make yyparse think this is eof. */ + value = 1; + break; + + case '(': + /* try, weakly, to handle casts to pointers to functions. */ + nextchar = skip_white_space (getch ()); + if (nextchar == '*') + { + int next_c = skip_white_space (getch ()); + if (next_c == ')') + { + nextchar = -1; + yylval.ttype = build1 (INDIRECT_REF, 0, 0); + value = PAREN_STAR_PAREN; + } + else + { + put_back (next_c); + value = c; + } + } + else if (nextchar == ')') + { + nextchar = -1; + yylval.ttype = NULL_TREE; + value = LEFT_RIGHT; + } + else value = c; + break; + + default: + value = c; + } + +done: +/* yylloc.last_line = lineno; */ +#ifdef GATHER_STATISTICS + token_count[value] += 1; +#endif + + return value; +} + +typedef enum +{ + d_kind, t_kind, s_kind, r_kind, e_kind, c_kind, + id_kind, op_id_kind, perm_list_kind, temp_list_kind, + vec_kind, x_kind, lang_decl, lang_type, all_kinds +} tree_node_kind; +extern int tree_node_counts[]; +extern int tree_node_sizes[]; +extern char *tree_node_kind_names[]; + +/* Place to save freed lang_decls which were allocated on the + permanent_obstack. @@ Not currently used. */ +tree free_lang_decl_chain; + +tree +build_lang_decl (code, name, type) + enum tree_code code; + tree name; + tree type; +{ + register tree t = build_decl (code, name, type); + struct obstack *obstack = current_obstack; + register int i = sizeof (struct lang_decl) / sizeof (int); + register int *pi; + + if (! TREE_PERMANENT (t)) + obstack = saveable_obstack; + else + /* Could be that saveable is permanent and current is not. */ + obstack = &permanent_obstack; + + if (free_lang_decl_chain && obstack == &permanent_obstack) + { + pi = (int *)free_lang_decl_chain; + free_lang_decl_chain = TREE_CHAIN (free_lang_decl_chain); + } + else + pi = (int *) obstack_alloc (obstack, sizeof (struct lang_decl)); + + while (i > 0) + pi[--i] = 0; + + DECL_LANG_SPECIFIC (t) = (struct lang_decl *) pi; + LANG_DECL_PERMANENT ((struct lang_decl *) pi) + = obstack == &permanent_obstack; + my_friendly_assert (LANG_DECL_PERMANENT ((struct lang_decl *) pi) + == TREE_PERMANENT (t), 234); + DECL_MAIN_VARIANT (t) = t; + if (current_lang_name == lang_name_cplusplus) + { + DECL_LANGUAGE (t) = lang_cplusplus; +#ifndef NO_AUTO_OVERLOAD + if (code == FUNCTION_DECL && name != 0 + && ! (IDENTIFIER_LENGTH (name) == 4 + && IDENTIFIER_POINTER (name)[0] == 'm' + && strcmp (IDENTIFIER_POINTER (name), "main") == 0) + && ! (IDENTIFIER_LENGTH (name) > 10 + && IDENTIFIER_POINTER (name)[0] == '_' + && IDENTIFIER_POINTER (name)[1] == '_' + && strncmp (IDENTIFIER_POINTER (name)+2, "builtin_", 8) == 0)) + TREE_OVERLOADED (name) = 1; +#endif + } + else if (current_lang_name == lang_name_c) + DECL_LANGUAGE (t) = lang_c; + else my_friendly_abort (64); + +#if 0 /* not yet, should get fixed properly later */ + if (code == TYPE_DECL) + { + tree id; + id = get_identifier (build_overload_name (type, 1, 1)); + DECL_ASSEMBLER_NAME (t) = id; + } + +#endif +#ifdef GATHER_STATISTICS + tree_node_counts[(int)lang_decl] += 1; + tree_node_sizes[(int)lang_decl] += sizeof(struct lang_decl); +#endif + + return t; +} + +tree +build_lang_field_decl (code, name, type) + enum tree_code code; + tree name; + tree type; +{ + extern struct obstack *current_obstack, *saveable_obstack; + register tree t = build_decl (code, name, type); + struct obstack *obstack = current_obstack; + register int i = sizeof (struct lang_decl_flags) / sizeof (int); + register int *pi; +#if 0 /* not yet, should get fixed properly later */ + + if (code == TYPE_DECL) + { + tree id; + id = get_identifier (build_overload_name (type, 1, 1)); + DECL_ASSEMBLER_NAME (t) = id; + } +#endif + + if (! TREE_PERMANENT (t)) + obstack = saveable_obstack; + else + my_friendly_assert (obstack == &permanent_obstack, 235); + + pi = (int *) obstack_alloc (obstack, sizeof (struct lang_decl_flags)); + while (i > 0) + pi[--i] = 0; + + DECL_LANG_SPECIFIC (t) = (struct lang_decl *) pi; + return t; +} + +void +copy_lang_decl (node) + tree node; +{ + int size; + int *pi; + + if (TREE_CODE (node) == FIELD_DECL) + size = sizeof (struct lang_decl_flags); + else + size = sizeof (struct lang_decl); + pi = (int *)obstack_alloc (&permanent_obstack, size); + bcopy ((char *)DECL_LANG_SPECIFIC (node), (char *)pi, size); + DECL_LANG_SPECIFIC (node) = (struct lang_decl *)pi; +} + +tree +make_lang_type (code) + enum tree_code code; +{ + extern struct obstack *current_obstack, *saveable_obstack; + register tree t = make_node (code); + struct obstack *obstack = current_obstack; + register int i = sizeof (struct lang_type) / sizeof (int); + register int *pi; + + /* Set up some flags that give proper default behavior. */ + IS_AGGR_TYPE (t) = 1; + + if (! TREE_PERMANENT (t)) + obstack = saveable_obstack; + else + my_friendly_assert (obstack == &permanent_obstack, 236); + + pi = (int *) obstack_alloc (obstack, sizeof (struct lang_type)); + while (i > 0) + pi[--i] = 0; + + TYPE_LANG_SPECIFIC (t) = (struct lang_type *) pi; + CLASSTYPE_AS_LIST (t) = build_tree_list (NULL_TREE, t); + SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown); + CLASSTYPE_INTERFACE_ONLY (t) = interface_only; + CLASSTYPE_VBASE_SIZE (t) = integer_zero_node; + TYPE_BINFO (t) = make_binfo (integer_zero_node, t, 0, 0, 0); + CLASSTYPE_BINFO_AS_LIST (t) = build_tree_list (NULL_TREE, TYPE_BINFO (t)); + + /* Make sure this is laid out, for ease of use later. + In the presence of parse errors, the normal was of assuring + this might not ever get executed, so we lay it out *immediately*. */ + build_pointer_type (t); + +#ifdef GATHER_STATISTICS + tree_node_counts[(int)lang_type] += 1; + tree_node_sizes[(int)lang_type] += sizeof(struct lang_type); +#endif + + return t; +} + +void +copy_decl_lang_specific (decl) + tree decl; +{ + extern struct obstack *current_obstack, *saveable_obstack; + register int *old = (int *)DECL_LANG_SPECIFIC (decl); + struct obstack *obstack = current_obstack; + register int i = sizeof (struct lang_decl) / sizeof (int); + register int *pi; + + if (! TREE_PERMANENT (decl)) + obstack = saveable_obstack; + else + my_friendly_assert (obstack == &permanent_obstack, 237); + + pi = (int *) obstack_alloc (obstack, sizeof (struct lang_decl)); + while (i-- > 0) + pi[i] = old[i]; + + DECL_LANG_SPECIFIC (decl) = (struct lang_decl *) pi; + +#ifdef GATHER_STATISTICS + tree_node_counts[(int)lang_decl] += 1; + tree_node_sizes[(int)lang_decl] += sizeof(struct lang_decl); +#endif +} + +void +dump_time_statistics () +{ + register tree prev = 0, decl, next; + int this_time = my_get_run_time (); + TREE_INT_CST_LOW (IDENTIFIER_LOCAL_VALUE (this_filename_time)) + += this_time - body_time; + + fprintf (stderr, "\n******\n"); + print_time ("header files (total)", header_time); + print_time ("main file (total)", this_time - body_time); + fprintf (stderr, "ratio = %g : 1\n", + (double)header_time / (double)(this_time - body_time)); + fprintf (stderr, "\n******\n"); + + for (decl = filename_times; decl; decl = next) + { + next = IDENTIFIER_GLOBAL_VALUE (decl); + IDENTIFIER_GLOBAL_VALUE (decl) = prev; + prev = decl; + } + + for (decl = prev; decl; decl = IDENTIFIER_GLOBAL_VALUE (decl)) + print_time (IDENTIFIER_POINTER (decl), + TREE_INT_CST_LOW (IDENTIFIER_LOCAL_VALUE (decl))); +} + +void +compiler_error (s, v, v2) + char *s; + HOST_WIDE_INT v, v2; /* @@also used as pointer */ +{ + char buf[1024]; + sprintf (buf, s, v, v2); + error_with_file_and_line (input_filename, lineno, "%s (compiler error)", buf); +} + +void +compiler_error_with_decl (decl, s) + tree decl; + char *s; +{ + char *name; + count_error (0); + + report_error_function (0); + + if (TREE_CODE (decl) == PARM_DECL) + fprintf (stderr, "%s:%d: ", + DECL_SOURCE_FILE (DECL_CONTEXT (decl)), + DECL_SOURCE_LINE (DECL_CONTEXT (decl))); + else + fprintf (stderr, "%s:%d: ", + DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl)); + + name = lang_printable_name (decl); + if (name) + fprintf (stderr, s, name); + else + fprintf (stderr, s, "((anonymous))"); + fprintf (stderr, " (compiler error)\n"); +} + +void +yyerror (string) + char *string; +{ + extern int end_of_file; + char buf[200]; + + strcpy (buf, string); + + /* We can't print string and character constants well + because the token_buffer contains the result of processing escapes. */ + if (end_of_file) + strcat (buf, input_redirected () + ? " at end of saved text" + : " at end of input"); + else if (token_buffer[0] == 0) + strcat (buf, " at null character"); + else if (token_buffer[0] == '"') + strcat (buf, " before string constant"); + else if (token_buffer[0] == '\'') + strcat (buf, " before character constant"); + else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177) + sprintf (buf + strlen (buf), " before character 0%o", + (unsigned char) token_buffer[0]); + else + strcat (buf, " before `%s'"); + + error (buf, token_buffer); +} diff --git a/gcc/cp/lex.h b/gcc/cp/lex.h new file mode 100644 index 0000000..a212f5c --- /dev/null +++ b/gcc/cp/lex.h @@ -0,0 +1,124 @@ +/* Define constants and variables for communication with cp-parse.y. + Copyright (C) 1987, 1992, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + and by Brendan Kehoe (brendan@cygnus.com). + +This file is part of GNU CC. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY. No author or distributor +accepts responsibility to anyone for the consequences of using it +or for whether it serves any particular purpose or works at all, +unless he says so in writing. Refer to the GNU CC General Public +License for full details. + +Everyone is granted permission to copy, modify and redistribute +GNU CC, but only under the conditions described in the +GNU CC General Public License. A copy of this license is +supposed to have been given to you along with GNU CC so you +can know your rights and responsibilities. It should be in a +file named COPYING. Among other things, the copyright notice +and this notice must be preserved on all copies. */ + + + +enum rid +{ + RID_UNUSED, + RID_INT, + RID_CHAR, + RID_WCHAR, + RID_FLOAT, + RID_DOUBLE, + RID_VOID, + + /* C++ extension */ + RID_CLASS, + RID_RECORD, + RID_UNION, + RID_ENUM, + RID_LONGLONG, + + /* This is where grokdeclarator starts its search when setting the specbits. + The first seven are in the order of most frequently used, as found + building libg++. */ + + RID_EXTERN, + RID_CONST, + RID_LONG, + RID_TYPEDEF, + RID_UNSIGNED, + RID_SHORT, + RID_INLINE, + + RID_STATIC, + + RID_REGISTER, + RID_VOLATILE, + RID_FRIEND, + RID_VIRTUAL, + RID_PUBLIC, + RID_PRIVATE, + RID_PROTECTED, + RID_SIGNED, + RID_EXCEPTION, + RID_RAISES, + RID_AUTO, + RID_MUTABLE, + RID_SIGNATURE, + /* Before adding enough to get up to 64, the RIDBIT_* macros + will have to be changed a little. */ + RID_MAX +}; + +#define NORID RID_UNUSED + +#define RID_FIRST_MODIFIER RID_EXTERN + +/* The type that can represent all values of RIDBIT. */ +/* We assume that we can stick in at least 32 bits into this. */ +typedef struct { unsigned long idata[2]; } + RID_BIT_TYPE; + +/* Be careful, all these modify N twice. */ +#define RIDBIT_SETP(N, V) (((unsigned long)1 << (int) ((N)%32)) \ + & (V).idata[(N)/32]) +#define RIDBIT_NOTSETP(NN, VV) (! RIDBIT_SETP (NN, VV)) +#define RIDBIT_SET(N, V) do { \ + (V).idata[(N)/32] \ + |= ((unsigned long)1 << (int) ((N)%32)); \ + } while (0) +#define RIDBIT_RESET(N, V) do { \ + (V).idata[(N)/32] \ + &= ~((unsigned long)1 << (int) ((N)%32)); \ + } while (0) +#define RIDBIT_RESET_ALL(V) do { \ + (V).idata[0] = 0; \ + (V).idata[1] = 0; \ + } while (0) +#define RIDBIT_ANY_SET(V) ((V).idata[0] || (V).idata[1]) + +/* The elements of `ridpointers' are identifier nodes + for the reserved type names and storage classes. + It is indexed by a RID_... value. */ +extern tree ridpointers[(int) RID_MAX]; + +/* the declaration found for the last IDENTIFIER token read in. + yylex must look this up to detect typedefs, which get token type TYPENAME, + so it is left around in case the identifier is not a typedef but is + used in a context which makes it a reference to a variable. */ +extern tree lastiddecl; + +extern char *token_buffer; /* Pointer to token buffer. */ + +/* Back-door communication channel to the lexer. */ +extern int looking_for_typename; + +/* Pending language change. + Positive is push count, negative is pop count. */ +extern int pending_lang_change; + +extern tree make_pointer_declarator (), make_reference_declarator (); +extern void reinit_parse_for_function (); +extern void reinit_parse_for_method (); +extern int yylex (); diff --git a/gcc/cp/method.c b/gcc/cp/method.c new file mode 100644 index 0000000..8375043 --- /dev/null +++ b/gcc/cp/method.c @@ -0,0 +1,1651 @@ +/* Handle the hair of processing (but not expanding) inline functions. + Also manage function and variable name overloading. + Copyright (C) 1987, 1989, 1992, 1993 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + + This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#ifndef PARM_CAN_BE_ARRAY_TYPE +#define PARM_CAN_BE_ARRAY_TYPE 1 +#endif + +/* Handle method declarations. */ +#include <stdio.h> +#include "config.h" +#include "tree.h" +#include "cp-tree.h" +#include "class.h" +#include "obstack.h" +#include <ctype.h> + +/* TREE_LIST of the current inline functions that need to be + processed. */ +struct pending_inline *pending_inlines; + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +/* Obstack where we build text strings for overloading, etc. */ +static struct obstack scratch_obstack; +static char *scratch_firstobj; + +# define OB_INIT() (scratch_firstobj ? (obstack_free (&scratch_obstack, scratch_firstobj), 0) : 0) +# define OB_PUTC(C) (obstack_1grow (&scratch_obstack, (C))) +# define OB_PUTC2(C1,C2) \ + (obstack_1grow (&scratch_obstack, (C1)), obstack_1grow (&scratch_obstack, (C2))) +# define OB_PUTS(S) (obstack_grow (&scratch_obstack, (S), sizeof (S) - 1)) +# define OB_PUTID(ID) \ + (obstack_grow (&scratch_obstack, IDENTIFIER_POINTER (ID), \ + IDENTIFIER_LENGTH (ID))) +# define OB_PUTCP(S) (obstack_grow (&scratch_obstack, (S), strlen (S))) +# define OB_FINISH() (obstack_1grow (&scratch_obstack, '\0')) + +#ifdef NO_AUTO_OVERLOAD +int is_overloaded (); +#endif + +void +init_method () +{ + gcc_obstack_init (&scratch_obstack); + scratch_firstobj = (char *)obstack_alloc (&scratch_obstack, 0); +} + +/* This must be large enough to hold any printed integer or floating-point + value. */ +static char digit_buffer[128]; + +/* Move inline function definitions out of structure so that they + can be processed normally. CNAME is the name of the class + we are working from, METHOD_LIST is the list of method lists + of the structure. We delete friend methods here, after + saving away their inline function definitions (if any). */ + +void +do_inline_function_hair (type, friend_list) + tree type, friend_list; +{ + tree method = TYPE_METHODS (type); + + if (method && TREE_CODE (method) == TREE_VEC) + { + if (TREE_VEC_ELT (method, 0)) + method = TREE_VEC_ELT (method, 0); + else + method = TREE_VEC_ELT (method, 1); + } + + while (method) + { + /* Do inline member functions. */ + struct pending_inline *info = DECL_PENDING_INLINE_INFO (method); + if (info) + { + tree args; + + my_friendly_assert (info->fndecl == method, 238); + args = DECL_ARGUMENTS (method); + while (args) + { + DECL_CONTEXT (args) = method; + args = TREE_CHAIN (args); + } + + /* Allow this decl to be seen in global scope */ + IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (method)) = method; + } + method = TREE_CHAIN (method); + } + while (friend_list) + { + tree fndecl = TREE_VALUE (friend_list); + struct pending_inline *info = DECL_PENDING_INLINE_INFO (fndecl); + if (info) + { + tree args; + + my_friendly_assert (info->fndecl == fndecl, 239); + args = DECL_ARGUMENTS (fndecl); + while (args) + { + DECL_CONTEXT (args) = fndecl; + args = TREE_CHAIN (args); + } + + /* Allow this decl to be seen in global scope */ + IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (fndecl)) = fndecl; + } + + friend_list = TREE_CHAIN (friend_list); + } +} + +/* Report an argument type mismatch between the best declared function + we could find and the current argument list that we have. */ +void +report_type_mismatch (cp, parmtypes, name_kind) + struct candidate *cp; + tree parmtypes; + char *name_kind; +{ + int i = cp->u.bad_arg; + tree ttf, tta; + char *tmp_firstobj; + + switch (i) + { + case -4: + my_friendly_assert (TREE_CODE (cp->function) == TEMPLATE_DECL, 240); + cp_error ("type unification failed for function template `%#D'", + cp->function); + return; + + case -3: + if (TYPE_READONLY (TREE_TYPE (TREE_VALUE (parmtypes)))) + cp_error ("call to const %s `%#D' with non-const object", name_kind, + cp->function); + else + cp_error ("call to non-const %s `%#D' with const object", name_kind, + cp->function); + return; + case -2: + cp_error ("too few arguments for %s `%#D'", name_kind, cp->function); + return; + case -1: + cp_error ("too many arguments for %s `%#D'", name_kind, cp->function); + return; + case 0: + if (TREE_CODE (TREE_TYPE (cp->function)) == METHOD_TYPE) + { + /* Happens when we have an ambiguous base class. */ + my_friendly_assert (get_binfo (DECL_CLASS_CONTEXT (cp->function), + TREE_TYPE (TREE_TYPE (TREE_VALUE (parmtypes))), 1) == error_mark_node, + 241); + return; + } + } + + ttf = TYPE_ARG_TYPES (TREE_TYPE (cp->function)); + tta = parmtypes; + + while (i-- > 0) + { + ttf = TREE_CHAIN (ttf); + tta = TREE_CHAIN (tta); + } + + OB_INIT (); + OB_PUTS ("bad argument "); + sprintf (digit_buffer, "%d", cp->u.bad_arg + - (TREE_CODE (TREE_TYPE (cp->function)) == METHOD_TYPE) + + 1); + OB_PUTCP (digit_buffer); + + OB_PUTS (" for function `"); + OB_PUTCP (decl_as_string (cp->function, 1)); + OB_PUTS ("' (type was "); + + /* Reset `i' so that type printing routines do the right thing. */ + if (tta) + { + enum tree_code code = TREE_CODE (TREE_TYPE (TREE_VALUE (tta))); + if (code == ERROR_MARK) + OB_PUTS ("(failed type instantiation)"); + else + { + i = (code == FUNCTION_TYPE || code == METHOD_TYPE); + OB_PUTCP (type_as_string (TREE_TYPE (TREE_VALUE (tta)), 1)); + } + } + else OB_PUTS ("void"); + OB_PUTC (')'); + OB_FINISH (); + + tmp_firstobj = (char *)alloca (obstack_object_size (&scratch_obstack)); + bcopy (obstack_base (&scratch_obstack), tmp_firstobj, + obstack_object_size (&scratch_obstack)); + error (tmp_firstobj); +} + +/* Here is where overload code starts. */ + +/* Array of types seen so far in top-level call to `build_overload_name'. + Allocated and deallocated by caller. */ +static tree *typevec; + +/* Number of types interned by `build_overload_name' so far. */ +static int maxtype; + +/* Number of occurrences of last type seen. */ +static int nrepeats; + +/* Nonzero if we should not try folding parameter types. */ +static int nofold; + +#define ALLOCATE_TYPEVEC(PARMTYPES) \ + do { maxtype = 0, nrepeats = 0; \ + typevec = (tree *)alloca (list_length (PARMTYPES) * sizeof (tree)); } while (0) + +#define DEALLOCATE_TYPEVEC(PARMTYPES) \ + do { tree t = (PARMTYPES); \ + while (t) { TREE_USED (TREE_VALUE (t)) = 0; t = TREE_CHAIN (t); } \ + } while (0) + +/* Code to concatenate an asciified integer to a string. */ +static +#ifdef __GNUC__ +__inline +#endif +void +icat (i) + int i; +{ + /* Handle this case first, to go really quickly. For many common values, + the result of i/10 below is 1. */ + if (i == 1) + { + OB_PUTC ('1'); + return; + } + + if (i < 0) + { + OB_PUTC ('m'); + i = -i; + } + if (i < 10) + OB_PUTC ('0' + i); + else + { + icat (i / 10); + OB_PUTC ('0' + (i % 10)); + } +} + +static +#ifdef __GNUC__ +__inline +#endif +void +flush_repeats (type) + tree type; +{ + int tindex = 0; + + while (typevec[tindex] != type) + tindex++; + + if (nrepeats > 1) + { + OB_PUTC ('N'); + icat (nrepeats); + if (nrepeats > 9) + OB_PUTC ('_'); + } + else + OB_PUTC ('T'); + nrepeats = 0; + icat (tindex); + if (tindex > 9) + OB_PUTC ('_'); +} + +static void build_overload_identifier (); + +static void +build_overload_nested_name (context) + tree context; +{ + /* We use DECL_NAME here, because pushtag now sets the DECL_ASSEMBLER_NAME. */ + tree name = DECL_NAME (context); + if (DECL_CONTEXT (context)) + { + context = DECL_CONTEXT (context); + if (TREE_CODE_CLASS (TREE_CODE (context)) == 't') + context = TYPE_NAME (context); + build_overload_nested_name (context); + } + build_overload_identifier (name); +} + +static void +build_overload_value (type, value) + tree type, value; +{ + while (TREE_CODE (value) == NON_LVALUE_EXPR + || TREE_CODE (value) == NOP_EXPR) + value = TREE_OPERAND (value, 0); + my_friendly_assert (TREE_CODE (type) == PARM_DECL, 242); + type = TREE_TYPE (type); + switch (TREE_CODE (type)) + { + case INTEGER_TYPE: + case ENUMERAL_TYPE: + { + my_friendly_assert (TREE_CODE (value) == INTEGER_CST, 243); + if (TYPE_PRECISION (value) == 2 * HOST_BITS_PER_WIDE_INT) + { + if (tree_int_cst_lt (value, integer_zero_node)) + { + OB_PUTC ('m'); + value = build_int_2 (~ TREE_INT_CST_LOW (value), + - TREE_INT_CST_HIGH (value)); + } + if (TREE_INT_CST_HIGH (value) + != (TREE_INT_CST_LOW (value) >> (HOST_BITS_PER_WIDE_INT - 1))) + { + /* need to print a DImode value in decimal */ + sorry ("conversion of long long as PT parameter"); + } + /* else fall through to print in smaller mode */ + } + /* Wordsize or smaller */ + icat (TREE_INT_CST_LOW (value)); + return; + } +#ifndef REAL_IS_NOT_DOUBLE + case REAL_TYPE: + { + REAL_VALUE_TYPE val; + char *bufp = digit_buffer; + extern char *index (); + + my_friendly_assert (TREE_CODE (value) == REAL_CST, 244); + val = TREE_REAL_CST (value); + if (val < 0) + { + val = -val; + *bufp++ = 'm'; + } + sprintf (bufp, "%e", val); + bufp = (char *) index (bufp, 'e'); + if (!bufp) + strcat (digit_buffer, "e0"); + else + { + char *p; + bufp++; + if (*bufp == '-') + { + *bufp++ = 'm'; + } + p = bufp; + if (*p == '+') + p++; + while (*p == '0') + p++; + if (*p == 0) + { + *bufp++ = '0'; + *bufp = 0; + } + else if (p != bufp) + { + while (*p) + *bufp++ = *p++; + *bufp = 0; + } + } + OB_PUTCP (digit_buffer); + return; + } +#endif + case POINTER_TYPE: + value = TREE_OPERAND (value, 0); + if (TREE_CODE (value) == VAR_DECL) + { + my_friendly_assert (DECL_NAME (value) != 0, 245); + build_overload_identifier (DECL_NAME (value)); + return; + } + else if (TREE_CODE (value) == FUNCTION_DECL) + { + my_friendly_assert (DECL_NAME (value) != 0, 246); + build_overload_identifier (DECL_NAME (value)); + return; + } + else + my_friendly_abort (71); + break; /* not really needed */ + + default: + sorry ("conversion of %s as template parameter", + tree_code_name [(int) TREE_CODE (type)]); + my_friendly_abort (72); + } +} + +static void +build_overload_identifier (name) + tree name; +{ + if (IDENTIFIER_TEMPLATE (name)) + { + tree template, parmlist, arglist, tname; + int i, nparms; + template = IDENTIFIER_TEMPLATE (name); + arglist = TREE_VALUE (template); + template = TREE_PURPOSE (template); + tname = DECL_NAME (template); + parmlist = DECL_ARGUMENTS (template); + nparms = TREE_VEC_LENGTH (parmlist); + OB_PUTC ('t'); + icat (IDENTIFIER_LENGTH (tname)); + OB_PUTID (tname); + icat (nparms); + for (i = 0; i < nparms; i++) + { + tree parm = TREE_VEC_ELT (parmlist, i); + tree arg = TREE_VEC_ELT (arglist, i); + if (TREE_CODE (parm) == IDENTIFIER_NODE) + { + /* This parameter is a type. */ + OB_PUTC ('Z'); + build_overload_name (arg, 0, 0); + } + else + { + /* It's a PARM_DECL. */ + build_overload_name (TREE_TYPE (parm), 0, 0); + build_overload_value (parm, arg); + } + } + } + else + { + icat (IDENTIFIER_LENGTH (name)); + OB_PUTID (name); + } +} + +/* Given a list of parameters in PARMTYPES, create an unambiguous + overload string. Should distinguish any type that C (or C++) can + distinguish. I.e., pointers to functions are treated correctly. + + Caller must deal with whether a final `e' goes on the end or not. + + Any default conversions must take place before this function + is called. + + BEGIN and END control initialization and finalization of the + obstack where we build the string. */ + +char * +build_overload_name (parmtypes, begin, end) + tree parmtypes; + int begin, end; +{ + int just_one; + tree parmtype; + + if (begin) OB_INIT (); + + if (just_one = (TREE_CODE (parmtypes) != TREE_LIST)) + { + parmtype = parmtypes; + goto only_one; + } + + while (parmtypes) + { + parmtype = TREE_VALUE (parmtypes); + + only_one: + + if (! nofold) + { + if (! just_one) + /* Every argument gets counted. */ + typevec[maxtype++] = parmtype; + + if (TREE_USED (parmtype)) + { + if (! just_one && parmtype == typevec[maxtype-2]) + nrepeats++; + else + { + if (nrepeats) + flush_repeats (parmtype); + if (! just_one && TREE_CHAIN (parmtypes) + && parmtype == TREE_VALUE (TREE_CHAIN (parmtypes))) + nrepeats++; + else + { + int tindex = 0; + + while (typevec[tindex] != parmtype) + tindex++; + OB_PUTC ('T'); + icat (tindex); + if (tindex > 9) + OB_PUTC ('_'); + } + } + goto next; + } + if (nrepeats) + flush_repeats (typevec[maxtype-2]); + if (! just_one + /* Only cache types which take more than one character. */ + && (parmtype != TYPE_MAIN_VARIANT (parmtype) + || (TREE_CODE (parmtype) != INTEGER_TYPE + && TREE_CODE (parmtype) != REAL_TYPE))) + TREE_USED (parmtype) = 1; + } + + if (TYPE_PTRMEMFUNC_P (parmtype)) + parmtype = TYPE_PTRMEMFUNC_FN_TYPE (parmtype); + + if (TREE_READONLY (parmtype)) + OB_PUTC ('C'); + if (TREE_CODE (parmtype) == INTEGER_TYPE + && TYPE_MAIN_VARIANT (parmtype) == unsigned_type (TYPE_MAIN_VARIANT (parmtype))) + OB_PUTC ('U'); + if (TYPE_VOLATILE (parmtype)) + OB_PUTC ('V'); + + switch (TREE_CODE (parmtype)) + { + case OFFSET_TYPE: + OB_PUTC ('O'); + build_overload_name (TYPE_OFFSET_BASETYPE (parmtype), 0, 0); + OB_PUTC ('_'); + build_overload_name (TREE_TYPE (parmtype), 0, 0); + break; + + case REFERENCE_TYPE: + OB_PUTC ('R'); + goto more; + + case ARRAY_TYPE: +#if PARM_CAN_BE_ARRAY_TYPE + { + tree length; + + OB_PUTC ('A'); + if (TYPE_DOMAIN (parmtype) == NULL_TREE) + { + error ("parameter type with unspecified array bounds invalid"); + icat (1); + } + else + { + length = array_type_nelts (parmtype); + if (TREE_CODE (length) == INTEGER_CST) + icat (TREE_INT_CST_LOW (length) + 1); + } + OB_PUTC ('_'); + goto more; + } +#else + OB_PUTC ('P'); + goto more; +#endif + + case POINTER_TYPE: + OB_PUTC ('P'); + more: + build_overload_name (TREE_TYPE (parmtype), 0, 0); + break; + + case FUNCTION_TYPE: + case METHOD_TYPE: + { + tree firstarg = TYPE_ARG_TYPES (parmtype); + /* Otherwise have to implement reentrant typevecs, + unmark and remark types, etc. */ + int old_nofold = nofold; + nofold = 1; + + if (nrepeats) + flush_repeats (typevec[maxtype-1]); + + /* @@ It may be possible to pass a function type in + which is not preceded by a 'P'. */ + if (TREE_CODE (parmtype) == FUNCTION_TYPE) + { + OB_PUTC ('F'); + if (firstarg == NULL_TREE) + OB_PUTC ('e'); + else if (firstarg == void_list_node) + OB_PUTC ('v'); + else + build_overload_name (firstarg, 0, 0); + } + else + { + int constp = TYPE_READONLY (TREE_TYPE (TREE_VALUE (firstarg))); + int volatilep = TYPE_VOLATILE (TREE_TYPE (TREE_VALUE (firstarg))); + OB_PUTC ('M'); + firstarg = TREE_CHAIN (firstarg); + + build_overload_name (TYPE_METHOD_BASETYPE (parmtype), 0, 0); + if (constp) + OB_PUTC ('C'); + if (volatilep) + OB_PUTC ('V'); + + /* For cfront 2.0 compatibility. */ + OB_PUTC ('F'); + + if (firstarg == NULL_TREE) + OB_PUTC ('e'); + else if (firstarg == void_list_node) + OB_PUTC ('v'); + else + build_overload_name (firstarg, 0, 0); + } + + /* Separate args from return type. */ + OB_PUTC ('_'); + build_overload_name (TREE_TYPE (parmtype), 0, 0); + nofold = old_nofold; + break; + } + + case INTEGER_TYPE: + parmtype = TYPE_MAIN_VARIANT (parmtype); + if (parmtype == integer_type_node + || parmtype == unsigned_type_node) + OB_PUTC ('i'); + else if (parmtype == long_integer_type_node + || parmtype == long_unsigned_type_node) + OB_PUTC ('l'); + else if (parmtype == short_integer_type_node + || parmtype == short_unsigned_type_node) + OB_PUTC ('s'); + else if (parmtype == signed_char_type_node) + { + OB_PUTC ('S'); + OB_PUTC ('c'); + } + else if (parmtype == char_type_node + || parmtype == unsigned_char_type_node) + OB_PUTC ('c'); + else if (parmtype == wchar_type_node) + OB_PUTC ('w'); + else if (parmtype == long_long_integer_type_node + || parmtype == long_long_unsigned_type_node) + OB_PUTC ('x'); +#if 0 + /* it would seem there is no way to enter these in source code, + yet. (mrs) */ + else if (parmtype == long_long_long_integer_type_node + || parmtype == long_long_long_unsigned_type_node) + OB_PUTC ('q'); +#endif + else + my_friendly_abort (73); + break; + + case REAL_TYPE: + parmtype = TYPE_MAIN_VARIANT (parmtype); + if (parmtype == long_double_type_node) + OB_PUTC ('r'); + else if (parmtype == double_type_node) + OB_PUTC ('d'); + else if (parmtype == float_type_node) + OB_PUTC ('f'); + else my_friendly_abort (74); + break; + + case VOID_TYPE: + if (! just_one) + { +#if 0 + extern tree void_list_node; + + /* See if anybody is wasting memory. */ + my_friendly_assert (parmtypes == void_list_node, 247); +#endif + /* This is the end of a parameter list. */ + if (end) OB_FINISH (); + return (char *)obstack_base (&scratch_obstack); + } + OB_PUTC ('v'); + break; + + case ERROR_MARK: /* not right, but nothing is anyway */ + break; + + /* have to do these */ + case UNION_TYPE: + case RECORD_TYPE: + if (! just_one) + /* Make this type signature look incompatible + with AT&T. */ + OB_PUTC ('G'); + goto common; + case ENUMERAL_TYPE: + common: + { + tree name = TYPE_NAME (parmtype); + int i = 1; + + if (TREE_CODE (name) == TYPE_DECL) + { + tree context = name; + while (DECL_CONTEXT (context)) + { + i += 1; + context = DECL_CONTEXT (context); + if (TREE_CODE_CLASS (TREE_CODE (context)) == 't') + context = TYPE_NAME (context); + } + name = DECL_NAME (name); + } + my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 248); + if (i > 1) + { + OB_PUTC ('Q'); + if (i > 9) + OB_PUTC ('_'); + icat (i); + if (i > 9) + OB_PUTC ('_'); + build_overload_nested_name (TYPE_NAME (parmtype)); + } + else + build_overload_identifier (name); + break; + } + + case UNKNOWN_TYPE: + /* This will take some work. */ + OB_PUTC ('?'); + break; + + case TEMPLATE_TYPE_PARM: + case TEMPLATE_CONST_PARM: + case UNINSTANTIATED_P_TYPE: + /* We don't ever want this output, but it's inconvenient not to + be able to build the string. This should cause assembler + errors we'll notice. */ + { + static int n; + sprintf (digit_buffer, " *%d", n++); + OB_PUTCP (digit_buffer); + } + break; + + default: + my_friendly_abort (75); + } + + next: + if (just_one) break; + parmtypes = TREE_CHAIN (parmtypes); + } + if (! just_one) + { + if (nrepeats) + flush_repeats (typevec[maxtype-1]); + + /* To get here, parms must end with `...'. */ + OB_PUTC ('e'); + } + + if (end) OB_FINISH (); + return (char *)obstack_base (&scratch_obstack); +} + +/* Generate an identifier that encodes the (ANSI) exception TYPE. */ + +/* This should be part of `ansi_opname', or at least be defined by the std. */ +#define EXCEPTION_NAME_PREFIX "__ex" +#define EXCEPTION_NAME_LENGTH 4 + +tree +cplus_exception_name (type) + tree type; +{ + OB_INIT (); + OB_PUTS (EXCEPTION_NAME_PREFIX); + return get_identifier (build_overload_name (type, 0, 1)); +} + +/* Change the name of a function definition so that it may be + overloaded. NAME is the name of the function to overload, + PARMS is the parameter list (which determines what name the + final function obtains). + + FOR_METHOD is 1 if this overload is being performed + for a method, rather than a function type. It is 2 if + this overload is being performed for a constructor. */ +tree +build_decl_overload (dname, parms, for_method) + tree dname; + tree parms; + int for_method; +{ + char *name = IDENTIFIER_POINTER (dname); + + if (dname == ansi_opname[(int) NEW_EXPR] + && parms != NULL_TREE + && TREE_CODE (parms) == TREE_LIST + && TREE_VALUE (parms) == sizetype + && TREE_CHAIN (parms) == void_list_node) + return get_identifier ("__builtin_new"); + else if (dname == ansi_opname[(int) DELETE_EXPR] + && parms != NULL_TREE + && TREE_CODE (parms) == TREE_LIST + && TREE_VALUE (parms) == ptr_type_node + && TREE_CHAIN (parms) == void_list_node) + return get_identifier ("__builtin_delete"); + else if (dname == ansi_opname[(int) DELETE_EXPR] + && parms != NULL_TREE + && TREE_CODE (parms) == TREE_LIST + && TREE_VALUE (parms) == ptr_type_node + && TREE_CHAIN (parms) != NULL_TREE + && TREE_CODE (TREE_CHAIN (parms)) == TREE_LIST + && TREE_VALUE (TREE_CHAIN (parms)) == sizetype + && TREE_CHAIN (TREE_CHAIN (parms)) == void_list_node) + return get_identifier ("__builtin_delete"); + + OB_INIT (); + if (for_method != 2) + OB_PUTCP (name); + /* Otherwise, we can divine that this is a constructor, + and figure out its name without any extra encoding. */ + + OB_PUTC2 ('_', '_'); + if (for_method) + { +#if 0 + /* We can get away without doing this. */ + OB_PUTC ('M'); +#endif + { + tree this_type = TREE_VALUE (parms); + + if (TREE_CODE (this_type) == RECORD_TYPE) /* a signature pointer */ + parms = temp_tree_cons (NULL_TREE, SIGNATURE_TYPE (this_type), + TREE_CHAIN (parms)); + else + parms = temp_tree_cons (NULL_TREE, TREE_TYPE (this_type), + TREE_CHAIN (parms)); + } + } + else + OB_PUTC ('F'); + + if (parms == NULL_TREE) + OB_PUTC2 ('e', '\0'); + else if (parms == void_list_node) + OB_PUTC2 ('v', '\0'); + else + { + ALLOCATE_TYPEVEC (parms); + nofold = 0; + if (for_method) + { + build_overload_name (TREE_VALUE (parms), 0, 0); + + typevec[maxtype++] = TREE_VALUE (parms); + TREE_USED (TREE_VALUE (parms)) = 1; + + if (TREE_CHAIN (parms)) + build_overload_name (TREE_CHAIN (parms), 0, 1); + else + OB_PUTC2 ('e', '\0'); + } + else + build_overload_name (parms, 0, 1); + DEALLOCATE_TYPEVEC (parms); + } + { + tree n = get_identifier (obstack_base (&scratch_obstack)); + if (IDENTIFIER_OPNAME_P (dname)) + IDENTIFIER_OPNAME_P (n) = 1; + return n; + } +} + +/* Build an overload name for the type expression TYPE. */ +tree +build_typename_overload (type) + tree type; +{ + tree id; + + OB_INIT (); + OB_PUTID (ansi_opname[(int) TYPE_EXPR]); + nofold = 1; + build_overload_name (type, 0, 1); + id = get_identifier (obstack_base (&scratch_obstack)); + IDENTIFIER_OPNAME_P (id) = 1; + return id; +} + +#ifndef NO_DOLLAR_IN_LABEL +#define T_DESC_FORMAT "TD$" +#define I_DESC_FORMAT "ID$" +#define M_DESC_FORMAT "MD$" +#else +#if !defined(NO_DOT_IN_LABEL) +#define T_DESC_FORMAT "TD." +#define I_DESC_FORMAT "ID." +#define M_DESC_FORMAT "MD." +#else +#define T_DESC_FORMAT "__t_desc_" +#define I_DESC_FORMAT "__i_desc_" +#define M_DESC_FORMAT "__m_desc_" +#endif +#endif + +/* Build an overload name for the type expression TYPE. */ +tree +build_t_desc_overload (type) + tree type; +{ + OB_INIT (); + OB_PUTS (T_DESC_FORMAT); + nofold = 1; + +#if 0 + /* Use a different format if the type isn't defined yet. */ + if (TYPE_SIZE (type) == NULL_TREE) + { + char *p; + int changed; + + for (p = tname; *p; p++) + if (isupper (*p)) + { + changed = 1; + *p = tolower (*p); + } + /* If there's no change, we have an inappropriate T_DESC_FORMAT. */ + my_friendly_assert (changed != 0, 249); + } +#endif + + build_overload_name (type, 0, 1); + return get_identifier (obstack_base (&scratch_obstack)); +} + +/* Top-level interface to explicit overload requests. Allow NAME + to be overloaded. Error if NAME is already declared for the current + scope. Warning if function is redundantly overloaded. */ + +void +declare_overloaded (name) + tree name; +{ +#ifdef NO_AUTO_OVERLOAD + if (is_overloaded (name)) + warning ("function `%s' already declared overloaded", + IDENTIFIER_POINTER (name)); + else if (IDENTIFIER_GLOBAL_VALUE (name)) + error ("overloading function `%s' that is already defined", + IDENTIFIER_POINTER (name)); + else + { + TREE_OVERLOADED (name) = 1; + IDENTIFIER_GLOBAL_VALUE (name) = build_tree_list (name, NULL_TREE); + TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (name)) = unknown_type_node; + } +#else + if (current_lang_name == lang_name_cplusplus) + { + if (0) + warning ("functions are implicitly overloaded in C++"); + } + else if (current_lang_name == lang_name_c) + error ("overloading function `%s' cannot be done in C language context"); + else + my_friendly_abort (76); +#endif +} + +#ifdef NO_AUTO_OVERLOAD +/* Check to see if NAME is overloaded. For first approximation, + check to see if its TREE_OVERLOADED is set. This is used on + IDENTIFIER nodes. */ +int +is_overloaded (name) + tree name; +{ + /* @@ */ + return (TREE_OVERLOADED (name) + && (! IDENTIFIER_CLASS_VALUE (name) || current_class_type == 0) + && ! IDENTIFIER_LOCAL_VALUE (name)); +} +#endif + +/* Given a tree_code CODE, and some arguments (at least one), + attempt to use an overloaded operator on the arguments. + + For unary operators, only the first argument need be checked. + For binary operators, both arguments may need to be checked. + + Member functions can convert class references to class pointers, + for one-level deep indirection. More than that is not supported. + Operators [](), ()(), and ->() must be member functions. + + We call function call building calls with LOOKUP_COMPLAIN if they + are our only hope. This is true when we see a vanilla operator + applied to something of aggregate type. If this fails, we are free + to return `error_mark_node', because we will have reported the + error. + + Operators NEW and DELETE overload in funny ways: operator new takes + a single `size' parameter, and operator delete takes a pointer to the + storage being deleted. When overloading these operators, success is + assumed. If there is a failure, report an error message and return + `error_mark_node'. */ + +/* NOSTRICT */ +tree +build_opfncall (code, flags, xarg1, xarg2, arg3) + enum tree_code code; + int flags; + tree xarg1, xarg2, arg3; +{ + tree rval = 0; + tree arg1, arg2; + tree type1, type2, fnname; + tree fields1 = 0, parms = 0; + tree global_fn; + int try_second; + int binary_is_unary; + + if (xarg1 == error_mark_node) + return error_mark_node; + + if (code == COND_EXPR) + { + if (TREE_CODE (xarg2) == ERROR_MARK + || TREE_CODE (arg3) == ERROR_MARK) + return error_mark_node; + } + if (code == COMPONENT_REF) + if (TREE_CODE (TREE_TYPE (xarg1)) == POINTER_TYPE) + return rval; + + /* First, see if we can work with the first argument */ + type1 = TREE_TYPE (xarg1); + + /* Some tree codes have length > 1, but we really only want to + overload them if their first argument has a user defined type. */ + switch (code) + { + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + case COMPONENT_REF: + binary_is_unary = 1; + try_second = 0; + break; + + /* ARRAY_REFs and CALL_EXPRs must overload successfully. + If they do not, return error_mark_node instead of NULL_TREE. */ + case ARRAY_REF: + if (xarg2 == error_mark_node) + return error_mark_node; + case CALL_EXPR: + rval = error_mark_node; + binary_is_unary = 0; + try_second = 0; + break; + + case NEW_EXPR: + { + fnname = ansi_opname[(int) NEW_EXPR]; + if (flags & LOOKUP_GLOBAL) + return build_overload_call (fnname, tree_cons (NULL_TREE, xarg2, arg3), + flags & LOOKUP_COMPLAIN, + (struct candidate *)0); + + rval = build_method_call + (build_indirect_ref (build1 (NOP_EXPR, xarg1, error_mark_node), + "new"), + fnname, tree_cons (NULL_TREE, xarg2, arg3), + NULL_TREE, flags); + if (rval == error_mark_node) + /* User might declare fancy operator new, but invoke it + like standard one. */ + return rval; + + TREE_TYPE (rval) = xarg1; + TREE_CALLS_NEW (rval) = 1; + return rval; + } + break; + + case DELETE_EXPR: + { + fnname = ansi_opname[(int) DELETE_EXPR]; + if (flags & LOOKUP_GLOBAL) + return build_overload_call (fnname, + tree_cons (NULL_TREE, xarg1, + build_tree_list (NULL_TREE, xarg2)), + flags & LOOKUP_COMPLAIN, + (struct candidate *)0); + + rval = build_method_call + (build_indirect_ref (build1 (NOP_EXPR, TREE_TYPE (xarg1), + error_mark_node), + NULL_PTR), + fnname, tree_cons (NULL_TREE, xarg1, + build_tree_list (NULL_TREE, xarg2)), + NULL_TREE, flags); + /* This happens when the user mis-declares `operator delete'. + Should now be impossible. */ + my_friendly_assert (rval != error_mark_node, 250); + TREE_TYPE (rval) = void_type_node; + return rval; + } + break; + + default: + binary_is_unary = 0; + try_second = tree_code_length [(int) code] == 2; + if (try_second && xarg2 == error_mark_node) + return error_mark_node; + break; + } + + if (try_second && xarg2 == error_mark_node) + return error_mark_node; + + /* What ever it was, we do not know how to deal with it. */ + if (type1 == NULL_TREE) + return rval; + + if (TREE_CODE (type1) == OFFSET_TYPE) + type1 = TREE_TYPE (type1); + + if (TREE_CODE (type1) == REFERENCE_TYPE) + { + arg1 = convert_from_reference (xarg1); + type1 = TREE_TYPE (arg1); + } + else + { + arg1 = xarg1; + } + + if (!IS_AGGR_TYPE (type1) || TYPE_PTRMEMFUNC_P (type1)) + { + /* Try to fail. First, fail if unary */ + if (! try_second) + return rval; + /* Second, see if second argument is non-aggregate. */ + type2 = TREE_TYPE (xarg2); + if (TREE_CODE (type2) == OFFSET_TYPE) + type2 = TREE_TYPE (type2); + if (TREE_CODE (type2) == REFERENCE_TYPE) + { + arg2 = convert_from_reference (xarg2); + type2 = TREE_TYPE (arg2); + } + else + { + arg2 = xarg2; + } + + if (!IS_AGGR_TYPE (type2)) + return rval; + try_second = 0; + } + + if (try_second) + { + /* First arg may succeed; see whether second should. */ + type2 = TREE_TYPE (xarg2); + if (TREE_CODE (type2) == OFFSET_TYPE) + type2 = TREE_TYPE (type2); + if (TREE_CODE (type2) == REFERENCE_TYPE) + { + arg2 = convert_from_reference (xarg2); + type2 = TREE_TYPE (arg2); + } + else + { + arg2 = xarg2; + } + + if (! IS_AGGR_TYPE (type2)) + try_second = 0; + } + + if (type1 == unknown_type_node + || (try_second && TREE_TYPE (xarg2) == unknown_type_node)) + { + /* This will not be implemented in the foreseeable future. */ + return rval; + } + + if (code == MODIFY_EXPR) + fnname = ansi_assopname[(int) TREE_CODE (arg3)]; + else + fnname = ansi_opname[(int) code]; + + global_fn = IDENTIFIER_GLOBAL_VALUE (fnname); + + /* This is the last point where we will accept failure. This + may be too eager if we wish an overloaded operator not to match, + but would rather a normal operator be called on a type-converted + argument. */ + + if (IS_AGGR_TYPE (type1)) + { + fields1 = lookup_fnfields (TYPE_BINFO (type1), fnname, 0); + /* ARM $13.4.7, prefix/postfix ++/--. */ + if (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR) + { + xarg2 = integer_zero_node; + binary_is_unary = 0; + + if (fields1) + { + tree t, t2; + int have_postfix = 0; + + /* Look for an `operator++ (int)'. If they didn't have + one, then we fall back to the old way of doing things. */ + for (t = TREE_VALUE (fields1); t ; t = TREE_CHAIN (t)) + { + t2 = TYPE_ARG_TYPES (TREE_TYPE (t)); + if (TREE_CHAIN (t2) != NULL_TREE + && TREE_VALUE (TREE_CHAIN (t2)) == integer_type_node) + { + have_postfix = 1; + break; + } + } + + if (! have_postfix) + { + char *op = POSTINCREMENT_EXPR ? "++" : "--"; + + /* There's probably a LOT of code in the world that + relies upon this old behavior. So we'll only give this + warning when we've been given -pedantic. A few + releases after 2.4, we'll convert this to be a pedwarn + or something else more appropriate. */ + if (pedantic) + warning ("no `operator%s (int)' declared for postfix `%s'", + op, op); + xarg2 = NULL_TREE; + binary_is_unary = 1; + } + } + } + } + + if (fields1 == NULL_TREE && global_fn == NULL_TREE) + return rval; + + /* If RVAL winds up being `error_mark_node', we will return + that... There is no way that normal semantics of these + operators will succeed. */ + + /* This argument may be an uncommitted OFFSET_REF. This is + the case for example when dealing with static class members + which are referenced from their class name rather than + from a class instance. */ + if (TREE_CODE (xarg1) == OFFSET_REF + && TREE_CODE (TREE_OPERAND (xarg1, 1)) == VAR_DECL) + xarg1 = TREE_OPERAND (xarg1, 1); + if (try_second && xarg2 && TREE_CODE (xarg2) == OFFSET_REF + && TREE_CODE (TREE_OPERAND (xarg2, 1)) == VAR_DECL) + xarg2 = TREE_OPERAND (xarg2, 1); + + if (global_fn) + flags |= LOOKUP_GLOBAL; + + if (code == CALL_EXPR) + { + /* This can only be a member function. */ + return build_method_call (xarg1, fnname, xarg2, + NULL_TREE, LOOKUP_NORMAL); + } + else if (tree_code_length[(int) code] == 1 || binary_is_unary) + { + parms = NULL_TREE; + rval = build_method_call (xarg1, fnname, NULL_TREE, NULL_TREE, flags); + } + else if (code == COND_EXPR) + { + parms = tree_cons (0, xarg2, build_tree_list (NULL_TREE, arg3)); + rval = build_method_call (xarg1, fnname, parms, NULL_TREE, flags); + } + else if (code == METHOD_CALL_EXPR) + { + /* must be a member function. */ + parms = tree_cons (NULL_TREE, xarg2, arg3); + return build_method_call (xarg1, fnname, parms, NULL_TREE, + LOOKUP_NORMAL); + } + else if (fields1) + { + parms = build_tree_list (NULL_TREE, xarg2); + rval = build_method_call (xarg1, fnname, parms, NULL_TREE, flags); + } + else + { + parms = tree_cons (NULL_TREE, xarg1, + build_tree_list (NULL_TREE, xarg2)); + rval = build_overload_call (fnname, parms, flags, + (struct candidate *)0); + } + + return rval; +} + +/* This function takes an identifier, ID, and attempts to figure out what + it means. There are a number of possible scenarios, presented in increasing + order of hair: + + 1) not in a class's scope + 2) in class's scope, member name of the class's method + 3) in class's scope, but not a member name of the class + 4) in class's scope, member name of a class's variable + + NAME is $1 from the bison rule. It is an IDENTIFIER_NODE. + VALUE is $$ from the bison rule. It is the value returned by lookup_name ($1) + yychar is the pending input character (suitably encoded :-). + + As a last ditch, try to look up the name as a label and return that + address. + + Values which are declared as being of REFERENCE_TYPE are + automatically dereferenced here (as a hack to make the + compiler faster). */ + +tree +hack_identifier (value, name, yychar) + tree value, name; + int yychar; +{ + tree type; + + if (TREE_CODE (value) == ERROR_MARK) + { + if (current_class_name) + { + tree fields = lookup_fnfields (TYPE_BINFO (current_class_type), name, 1); + if (fields == error_mark_node) + return error_mark_node; + if (fields) + { + tree fndecl; + + fndecl = TREE_VALUE (fields); + my_friendly_assert (TREE_CODE (fndecl) == FUNCTION_DECL, 251); + if (DECL_CHAIN (fndecl) == NULL_TREE) + { + warning ("methods cannot be converted to function pointers"); + return fndecl; + } + else + { + error ("ambiguous request for method pointer `%s'", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + } + } + if (flag_labels_ok && IDENTIFIER_LABEL_VALUE (name)) + { + return IDENTIFIER_LABEL_VALUE (name); + } + return error_mark_node; + } + + type = TREE_TYPE (value); + if (TREE_CODE (value) == FIELD_DECL) + { + if (current_class_decl == NULL_TREE) + { + error ("request for member `%s' in static member function", + IDENTIFIER_POINTER (DECL_NAME (value))); + return error_mark_node; + } + TREE_USED (current_class_decl) = 1; + if (yychar == '(') + if (! ((TYPE_LANG_SPECIFIC (type) + && TYPE_OVERLOADS_CALL_EXPR (type)) + || (TREE_CODE (type) == REFERENCE_TYPE + && TYPE_LANG_SPECIFIC (TREE_TYPE (type)) + && TYPE_OVERLOADS_CALL_EXPR (TREE_TYPE (type)))) + && TREE_CODE (type) != FUNCTION_TYPE + && TREE_CODE (type) != METHOD_TYPE + && !TYPE_PTRMEMFUNC_P (type) + && (TREE_CODE (type) != POINTER_TYPE + || (TREE_CODE (TREE_TYPE (type)) != FUNCTION_TYPE + && TREE_CODE (TREE_TYPE (type)) != METHOD_TYPE))) + { + error ("component `%s' is not a method", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + /* Mark so that if we are in a constructor, and then find that + this field was initialized by a base initializer, + we can emit an error message. */ + TREE_USED (value) = 1; + return build_component_ref (C_C_D, name, 0, 1); + } + + if (TREE_CODE (value) == TREE_LIST) + { + tree t = value; + while (t && TREE_CODE (t) == TREE_LIST) + { + assemble_external (TREE_VALUE (t)); + TREE_USED (t) = 1; + t = TREE_CHAIN (t); + } + } + else + { + assemble_external (value); + TREE_USED (value) = 1; + } + + if (TREE_CODE_CLASS (TREE_CODE (value)) == 'd' && DECL_NONLOCAL (value)) + { + if (DECL_LANG_SPECIFIC (value) + && DECL_CLASS_CONTEXT (value) != current_class_type) + { + tree path; + enum access_type access; + register tree context + = (TREE_CODE (value) == FUNCTION_DECL && DECL_VIRTUAL_P (value)) + ? DECL_CLASS_CONTEXT (value) + : DECL_CONTEXT (value); + + get_base_distance (context, current_class_type, 0, &path); + if (path) + { + access = compute_access (path, value); + if (access != access_public) + { + if (TREE_CODE (value) == VAR_DECL) + error ("static member `%s' is %s", + IDENTIFIER_POINTER (name), + TREE_PRIVATE (value) ? "private" : + "from a private base class"); + else + error ("enum `%s' is from private base class", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + } + } + return value; + } + if (TREE_CODE (value) == TREE_LIST && TREE_NONLOCAL_FLAG (value)) + { + if (type == 0) + { + error ("request for member `%s' is ambiguous in multiple inheritance lattice", + IDENTIFIER_POINTER (name)); + return error_mark_node; + } + + return value; + } + + if (TREE_CODE (type) == REFERENCE_TYPE) + { + my_friendly_assert (TREE_CODE (value) == VAR_DECL + || TREE_CODE (value) == PARM_DECL + || TREE_CODE (value) == RESULT_DECL, 252); + if (DECL_REFERENCE_SLOT (value)) + return DECL_REFERENCE_SLOT (value); + } + return value; +} + + +/* Given an object OF, and a type conversion operator COMPONENT + build a call to the conversion operator, if a call is requested, + or return the address (as a pointer to member function) if one is not. + + OF can be a TYPE_DECL or any kind of datum that would normally + be passed to `build_component_ref'. It may also be NULL_TREE, + in which case `current_class_type' and `current_class_decl' + provide default values. + + BASETYPE_PATH, if non-null, is the path of basetypes + to go through before we get the the instance of interest. + + PROTECT says whether we apply C++ scoping rules or not. */ +tree +build_component_type_expr (of, component, basetype_path, protect) + tree of, component, basetype_path; + int protect; +{ + tree cname = NULL_TREE; + tree tmp, last; + tree name; + int flags = protect ? LOOKUP_NORMAL : LOOKUP_COMPLAIN; + + if (of) + my_friendly_assert (IS_AGGR_TYPE (TREE_TYPE (of)), 253); + my_friendly_assert (TREE_CODE (component) == TYPE_EXPR, 254); + + tmp = TREE_OPERAND (component, 0); + last = NULL_TREE; + + while (tmp) + { + switch (TREE_CODE (tmp)) + { + case CALL_EXPR: + if (last) + TREE_OPERAND (last, 0) = TREE_OPERAND (tmp, 0); + else + TREE_OPERAND (component, 0) = TREE_OPERAND (tmp, 0); + + last = groktypename (build_tree_list (TREE_TYPE (component), + TREE_OPERAND (component, 0))); + name = build_typename_overload (last); + TREE_TYPE (name) = last; + + if (TREE_OPERAND (tmp, 0) + && TREE_OPERAND (tmp, 0) != void_list_node) + { + cp_error ("`operator %T' requires empty parameter list", last); + TREE_OPERAND (tmp, 0) = NULL_TREE; + } + + if (of && TREE_CODE (of) != TYPE_DECL) + return build_method_call (of, name, NULL_TREE, NULL_TREE, flags); + else if (of) + { + tree this_this; + + if (current_class_decl == NULL_TREE) + { + cp_error ("object required for `operator %T' call", + TREE_TYPE (name)); + return error_mark_node; + } + + this_this = convert_pointer_to (TREE_TYPE (of), + current_class_decl); + this_this = build_indirect_ref (this_this, NULL_PTR); + return build_method_call (this_this, name, NULL_TREE, + NULL_TREE, flags | LOOKUP_NONVIRTUAL); + } + else if (current_class_decl) + return build_method_call (tmp, name, NULL_TREE, NULL_TREE, flags); + + cp_error ("object required for `operator %T' call", + TREE_TYPE (name)); + return error_mark_node; + + case INDIRECT_REF: + case ADDR_EXPR: + case ARRAY_REF: + break; + + case SCOPE_REF: + my_friendly_assert (cname == 0, 255); + cname = TREE_OPERAND (tmp, 0); + tmp = TREE_OPERAND (tmp, 1); + break; + + default: + my_friendly_abort (77); + } + last = tmp; + tmp = TREE_OPERAND (tmp, 0); + } + + last = groktypename (build_tree_list (TREE_TYPE (component), TREE_OPERAND (component, 0))); + name = build_typename_overload (last); + TREE_TYPE (name) = last; + if (of && TREE_CODE (of) == TYPE_DECL) + { + if (cname == NULL_TREE) + { + cname = DECL_NAME (of); + of = NULL_TREE; + } + else my_friendly_assert (cname == DECL_NAME (of), 256); + } + + if (of) + { + tree this_this; + + if (current_class_decl == NULL_TREE) + { + cp_error ("object required for `operator %T' call", + TREE_TYPE (name)); + return error_mark_node; + } + + this_this = convert_pointer_to (TREE_TYPE (of), current_class_decl); + return build_component_ref (this_this, name, 0, protect); + } + else if (cname) + return build_offset_ref (cname, name); + else if (current_class_name) + return build_offset_ref (current_class_name, name); + + cp_error ("object required for `operator %T' member reference", + TREE_TYPE (name)); + return error_mark_node; +} diff --git a/gcc/cp/parse.y b/gcc/cp/parse.y new file mode 100644 index 0000000..933cd44 --- /dev/null +++ b/gcc/cp/parse.y @@ -0,0 +1,4099 @@ +/* YACC parser for C++ syntax. + Copyright (C) 1988, 1989, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This grammar is based on the GNU CC grammar. */ + +/* Note: Bison automatically applies a default action of "$$ = $1" for + all derivations; this is applied before the explicit action, if one + is given. Keep this in mind when reading the actions. */ + +/* Also note: this version contains experimental exception + handling features. They could break, change, disappear, + or otherwise exhibit volatile behavior. Don't depend on + me (Michael Tiemann) to protect you from any negative impact + this may have on your professional, personal, or spiritual life. + + NEWS FLASH: This version now supports the exception handling + syntax of Stroustrup's 2nd edition, if -fansi-exceptions is given. + THIS IS WORK IN PROGRESS!!! The type of the 'throw' and the + 'catch' much match EXACTLY (no inheritance support or coercions). + Also, throw-specifications of functions don't work. + Destructors aren't called correctly. Etc, etc. --Per Bothner. + */ + +%{ +#if defined(GATHER_STATISTICS) || defined(SPEW_DEBUG) +#undef YYDEBUG +#define YYDEBUG 1 +#endif + +#include "config.h" + +#include <stdio.h> +#include <errno.h> + +#include "tree.h" +#include "input.h" +#include "flags.h" +#include "lex.h" +#include "cp-tree.h" + +/* Since parsers are distinct for each language, put the language string + definition here. (fnf) */ +char *language_string = "GNU C++"; + +extern tree void_list_node; +extern struct obstack permanent_obstack; + +#ifndef errno +extern int errno; +#endif + +extern int end_of_file; + +void yyerror (); + +/* Like YYERROR but do call yyerror. */ +#define YYERROR1 { yyerror ("syntax error"); YYERROR; } + +static void position_after_white_space (); + +/* Contains the statement keyword (if/while/do) to include in an + error message if the user supplies an empty conditional expression. */ +static char *cond_stmt_keyword; + +/* Nonzero if we have an `extern "C"' acting as an extern specifier. */ +int have_extern_spec; +int used_extern_spec; + +void yyhook (); + +/* Cons up an empty parameter list. */ +#ifdef __GNUC__ +__inline +#endif +static tree +empty_parms () +{ + tree parms; + + if (strict_prototype) + parms = void_list_node; + else + parms = NULL_TREE; + return parms; +} +%} + +%start program + +%union {long itype; tree ttype; char *strtype; enum tree_code code; } + +/* All identifiers that are not reserved words + and are not declared typedefs in the current block */ +%token IDENTIFIER + +/* All identifiers that are declared typedefs in the current block. + In some contexts, they are treated just like IDENTIFIER, + but they can also serve as typespecs in declarations. */ +%token TYPENAME + +/* Qualified identifiers that end in a TYPENAME. */ +%token SCOPED_TYPENAME + +/* Qualified identifiers that end in a IDENTIFIER. */ +%token SCOPED_NAME + +/* Reserved words that specify storage class. + yylval contains an IDENTIFIER_NODE which indicates which one. */ +%token SCSPEC + +/* Reserved words that specify type. + yylval contains an IDENTIFIER_NODE which indicates which one. */ +%token TYPESPEC + +/* Reserved words that qualify type: "const" or "volatile". + yylval contains an IDENTIFIER_NODE which indicates which one. */ +%token TYPE_QUAL + +/* Character or numeric constants. + yylval is the node for the constant. */ +%token CONSTANT + +/* String constants in raw form. + yylval is a STRING_CST node. */ +%token STRING + +/* "...", used for functions with variable arglists. */ +%token ELLIPSIS + +/* the reserved words */ +/* SCO include files test "ASM", so use something else. */ +%token SIZEOF ENUM /* STRUCT UNION */ IF ELSE WHILE DO FOR SWITCH CASE DEFAULT +%token BREAK CONTINUE RETURN GOTO ASM_KEYWORD GCC_ASM_KEYWORD TYPEOF ALIGNOF +%token HEADOF CLASSOF SIGOF +%token ATTRIBUTE EXTENSION LABEL + +/* the reserved words... C++ extensions */ +%token <ttype> AGGR +%token <itype> VISSPEC +%token DELETE NEW OVERLOAD THIS OPERATOR +%token LEFT_RIGHT TEMPLATE +%token TYPEID DYNAMIC_CAST +%token <itype> SCOPE + +/* Special token created by the lexer to separate TYPENAME + from an ABSDCL. This allows us to parse `foo (*pf)()'. */ + +%token START_DECLARATOR + +/* Define the operator tokens and their precedences. + The value is an integer because, if used, it is the tree code + to use in the expression made from the operator. */ + +%left EMPTY /* used to resolve s/r with epsilon */ + +%left error + +/* Add precedence rules to solve dangling else s/r conflict */ +%nonassoc IF +%nonassoc ELSE + +%left IDENTIFIER TYPENAME PTYPENAME TYPENAME_COLON SCSPEC TYPESPEC TYPE_QUAL ENUM AGGR ELLIPSIS + +%left '{' ',' ';' + +%right <code> ASSIGN '=' +%right <code> '?' ':' RANGE +%left <code> OROR +%left <code> ANDAND +%left <code> '|' +%left <code> '^' +%left <code> '&' +%left <code> MIN_MAX +%left <code> EQCOMPARE +%left <code> ARITHCOMPARE '<' '>' +%left <code> LSHIFT RSHIFT +%left <code> '+' '-' +%left <code> '*' '/' '%' +%right <code> UNARY PLUSPLUS MINUSMINUS +%left HYPERUNARY +%left <ttype> PAREN_STAR_PAREN LEFT_RIGHT +%left <code> POINTSAT POINTSAT_STAR '.' DOT_STAR '(' '[' + +%right SCOPE /* C++ extension */ +%nonassoc NEW DELETE RAISE RAISES RERAISE TRY EXCEPT CATCH THROW +%nonassoc ANSI_TRY ANSI_THROW + +%type <code> unop + +%type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist +%type <ttype> optional_identifier paren_expr_or_null +%type <ttype> expr_no_commas cast_expr unary_expr primary string STRING +%type <ttype> typed_declspecs reserved_declspecs +%type <ttype> typed_typespecs reserved_typespecquals +%type <ttype> declmods typespec typespecqual_reserved +%type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual +%type <itype> initdecls notype_initdecls initdcl /* C++ modification */ +%type <ttype> init initlist maybeasm +%type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers +%type <ttype> maybe_attribute attribute_list attrib +%type <ttype> abs_member_declarator after_type_member_declarator + +%type <ttype> compstmt except_stmts ansi_except_stmts implicitly_scoped_stmt + +%type <ttype> declarator notype_declarator after_type_declarator + +%type <ttype> structsp opt.component_decl_list component_decl_list +%type <ttype> component_decl components component_declarator +%type <ttype> enumlist enumerator +%type <ttype> typename absdcl absdcl1 type_quals abs_or_notype_decl +%type <ttype> xexpr see_typename parmlist parms parm bad_parm +%type <ttype> identifiers_or_typenames + +/* C++ extensions */ +%type <ttype> typename_scope +%token <ttype> TYPENAME_COLON TYPENAME_ELLIPSIS +%token <ttype> PTYPENAME SCOPED_TYPENAME SCOPED_NAME +%token <ttype> PRE_PARSED_FUNCTION_DECL EXTERN_LANG_STRING ALL +%token <ttype> PRE_PARSED_CLASS_DECL +%type <ttype> fn.def1 /* Not really! */ +%type <ttype> fn.def2 return_id +%type <ttype> named_class_head named_class_head_sans_basetype +%type <ttype> unnamed_class_head +%type <ttype> class_head base_class_list +%type <itype> base_class_access_list +%type <ttype> base_class maybe_base_class_list base_class.1 +%type <ttype> after_type_declarator_no_typename +%type <ttype> maybe_raises raise_identifier raise_identifiers ansi_raise_identifier ansi_raise_identifiers +%type <ttype> component_declarator0 id_scope scoped_typename scoped_base_class +%type <ttype> forhead.1 identifier_or_opname operator_name +%type <ttype> new delete object object_star aggr +/* %type <ttype> primary_no_id */ +%type <ttype> nonmomentary_expr +%type <itype> forhead.2 initdcl0 notype_initdcl0 member_init_list +%type <itype> .scope try ansi_try +%type <ttype> template_header template_parm_list template_parm +%type <ttype> template_type template_arg_list template_arg +%type <ttype> template_instantiation template_type_name tmpl.1 tmpl.2 +%type <ttype> template_instantiate_once template_instantiate_some +%type <itype> fn_tmpl_end +/* %type <itype> try_for_typename */ +%type <ttype> condition partially_scoped_stmt xcond paren_cond_or_null +%type <strtype> .kindof_pushlevel + +/* in order to recognize aggr tags as defining and thus shadowing. */ +%token TYPENAME_DEFN IDENTIFIER_DEFN PTYPENAME_DEFN +%type <ttype> named_class_head_sans_basetype_defn +%type <ttype> identifier_defn IDENTIFIER_DEFN TYPENAME_DEFN PTYPENAME_DEFN + +%type <strtype> .pushlevel + +/* cp-spew.c depends on this being the last token. Define + any new tokens before this one! */ +%token END_OF_SAVED_INPUT + +%{ +/* List of types and structure classes of the current declaration. */ +static tree current_declspecs; + +/* When defining an aggregate, this is the most recent one being defined. */ +static tree current_aggr; + +/* Tell yyparse how to print a token's value, if yydebug is set. */ + +#define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL) +extern void yyprint (); +extern tree combine_strings PROTO((tree)); +extern tree truthvalue_conversion PROTO((tree)); +%} + +%% +program: /* empty */ + | extdefs + { + /* In case there were missing closebraces, + get us back to the global binding level. */ + while (! global_bindings_p ()) + poplevel (0, 0, 0); + finish_file (); + } + ; + +/* the reason for the strange actions in this rule + is so that notype_initdecls when reached via datadef + can find a valid list of type and sc specs in $0. */ + +extdefs: + { $<ttype>$ = NULL_TREE; } lang_extdef + { $<ttype>$ = NULL_TREE; } + | extdefs lang_extdef + { $<ttype>$ = NULL_TREE; } + ; + +.hush_warning: + { have_extern_spec = 1; + used_extern_spec = 0; + $<ttype>$ = NULL_TREE; } + ; +.warning_ok: + { have_extern_spec = 0; } + ; + +asm_keyword: + ASM_KEYWORD { if (pedantic) + pedwarn ("ANSI C++ forbids use of `asm' keyword"); } + | GCC_ASM_KEYWORD + ; + +lang_extdef: + { if (pending_lang_change) do_pending_lang_change(); } + extdef + ; + +extdef: + fndef + { if (pending_inlines) do_pending_inlines (); } + | datadef + { if (pending_inlines) do_pending_inlines (); } + | template_def + { if (pending_inlines) do_pending_inlines (); } + | overloaddef + | asm_keyword '(' string ')' ';' + { if (TREE_CHAIN ($3)) $3 = combine_strings ($3); + assemble_asm ($3); } + | extern_lang_string '{' extdefs '}' + { pop_lang_context (); } + | extern_lang_string '{' '}' + { pop_lang_context (); } + | extern_lang_string .hush_warning fndef .warning_ok + { if (pending_inlines) do_pending_inlines (); + pop_lang_context (); } + | extern_lang_string .hush_warning datadef .warning_ok + { if (pending_inlines) do_pending_inlines (); + pop_lang_context (); } + ; + +extern_lang_string: + EXTERN_LANG_STRING + { push_lang_context ($1); } + ; + +template_header: + TEMPLATE '<' + { begin_template_parm_list (); } + template_parm_list '>' + { $$ = end_template_parm_list ($4); } + ; + +template_parm_list: + template_parm + { $$ = process_template_parm (NULL_TREE, $1); } + | template_parm_list ',' template_parm + { $$ = process_template_parm ($1, $3); } + ; + +template_parm: + /* The following rules introduce a new reduce/reduce + conflict: they are valid prefixes for a `structsp', + which means they could match a nameless parameter. + By putting them before the `parm' rule, we get + their match before considering them nameless parameter + declarations. */ + aggr identifier + { + if ($1 == signature_type_node) + sorry ("signature as template type parameter"); + else if ($1 != class_type_node) + error ("template type parameter must use keyword `class'"); + $$ = build_tree_list ($2, NULL_TREE); + } + | aggr identifier_defn ':' base_class.1 + { + if ($1 == signature_type_node) + sorry ("signature as template type parameter"); + else if ($1 != class_type_node) + error ("template type parameter must use keyword `class'"); + warning ("restricted template type parameters not yet implemented"); + $$ = build_tree_list ($2, $4); + } + | aggr TYPENAME_COLON base_class.1 + { + if ($1 == signature_type_node) + sorry ("signature as template type parameter"); + else if ($1 != class_type_node) + error ("template type parameter must use keyword `class'"); + warning ("restricted template type parameters not yet implemented"); + $$ = build_tree_list ($2, $3); + } + | parm + ; + +overloaddef: + OVERLOAD ov_identifiers ';' + { warning ("use of `overload' is an anachronism"); } + ; + +ov_identifiers: IDENTIFIER + { declare_overloaded ($1); } + | ov_identifiers ',' IDENTIFIER + { declare_overloaded ($3); } + ; + +template_def: + /* Class template declarations go here; they aren't normal class + declarations, because we can't process the bodies yet. */ + template_header named_class_head_sans_basetype '{' + { yychar = '{'; goto template1; } + ';' + | template_header named_class_head_sans_basetype_defn '{' + { yychar = '{'; goto template1; } + ';' + | template_header named_class_head_sans_basetype ':' + { yychar = ':'; goto template1; } + ';' + | template_header named_class_head_sans_basetype_defn ':' + { + yychar = ':'; + template1: + if (current_aggr == exception_type_node) + error ("template type must define an aggregate or union"); + else if (current_aggr == signature_type_node) + sorry ("template type defining a signature"); + /* Maybe pedantic warning for union? + How about an enum? :-) */ + end_template_decl ($1, $2, current_aggr); + reinit_parse_for_template (yychar, $1, $2); + yychar = YYEMPTY; + } + ';' + | template_header named_class_head_sans_basetype ';' + { + end_template_decl ($1, $2, current_aggr); + /* declare $2 as template name with $1 parm list */ + } + | template_header named_class_head_sans_basetype_defn ';' + { + end_template_decl ($1, $2, current_aggr); + /* declare $2 as template name with $1 parm list */ + } + | template_header /* notype_initdcl0 ';' */ + notype_declarator maybe_raises maybeasm maybe_attribute + fn_tmpl_end + { + tree d; + int momentary; + momentary = suspend_momentary (); + d = start_decl ($<ttype>2, /*current_declspecs*/NULL_TREE, 0, $3); + cplus_decl_attributes (d, $5); + finish_decl (d, NULL_TREE, $4, 0); + end_template_decl ($1, d, 0); + if ($6 != ';') + reinit_parse_for_template ((int) $6, $1, d); + resume_momentary (momentary); + } + | template_header typed_declspecs /*initdcl0*/ + declarator maybe_raises maybeasm maybe_attribute + fn_tmpl_end + { + tree d; + int momentary; + + current_declspecs = $2; + momentary = suspend_momentary (); + d = start_decl ($<ttype>3, current_declspecs, + 0, $<ttype>4); + cplus_decl_attributes (d, $6); + finish_decl (d, NULL_TREE, $5, 0); + end_exception_decls (); + end_template_decl ($1, d, 0); + if ($7 != ';') + { + reinit_parse_for_template ((int) $7, $1, d); + yychar = YYEMPTY; + } + note_list_got_semicolon ($<ttype>2); + resume_momentary (momentary); + } + | template_header declmods declarator fn_tmpl_end + { + tree d = start_decl ($<ttype>3, $<ttype>2, 0, NULL_TREE); + finish_decl (d, NULL_TREE, NULL_TREE, 0); + end_template_decl ($1, d, 0); + if ($4 != ';') + reinit_parse_for_template ((int) $4, $1, d); + } + /* Try to recover from syntax errors in templates. */ + | template_header error '}' { end_template_decl ($1, 0, 0); } + | template_header error ';' { end_template_decl ($1, 0, 0); } + ; + +fn_tmpl_end: '{' { $$ = '{'; } + | ':' { $$ = ':'; } + | ';' { $$ = ';'; } + | '=' { $$ = '='; } + | RETURN { $$ = RETURN; } + ; + +datadef: + notype_initdecls ';' + { if (pedantic) + pedwarn ("ANSI C++ forbids data definition with no type or storage class"); + else if (! flag_traditional && ! have_extern_spec) + warning ("data definition has no type or storage class"); } + | declmods notype_initdecls ';' + {} + /* Normal case to make fast: "int i;". */ + | declmods declarator ';' + { tree d; + d = start_decl ($<ttype>2, $<ttype>$, 0, NULL_TREE); + finish_decl (d, NULL_TREE, NULL_TREE, 0); + } + | typed_declspecs initdecls ';' + { + end_exception_decls (); + note_list_got_semicolon ($<ttype>$); + } + /* Normal case: make this fast. */ + | typed_declspecs declarator ';' + { tree d; + d = start_decl ($<ttype>2, $<ttype>$, 0, NULL_TREE); + finish_decl (d, NULL_TREE, NULL_TREE, 0); + end_exception_decls (); + note_list_got_semicolon ($<ttype>$); + } + | declmods ';' + { pedwarn ("empty declaration"); } + | explicit_instantiation ';' + | typed_declspecs ';' + { + tree t = $<ttype>$; + shadow_tag (t); + if (TREE_CODE (t) == TREE_LIST + && TREE_PURPOSE (t) == NULL_TREE) + { + t = TREE_VALUE (t); + if (TREE_CODE (t) == RECORD_TYPE) + { + if (CLASSTYPE_USE_TEMPLATE (t) == 0) + CLASSTYPE_USE_TEMPLATE (t) = 2; + else if (CLASSTYPE_USE_TEMPLATE (t) == 1) + error ("override declaration for already-expanded template"); + } + else if (TREE_CODE (t) == ENUMERAL_TYPE + && !TYPE_SIZE (t)) + cp_error ("forward declaration of `%#T'", t); + else if (TREE_CODE (t) == IDENTIFIER_NODE) + { + tree v = lookup_name (t, 1); + cp_error ("abstract declarator `%T' used as declaration", + v); + } + } + note_list_got_semicolon ($<ttype>$); + } + | error ';' + | error '}' + | ';' + ; + +fndef: + fn.def1 base_init compstmt_or_error + { + finish_function (lineno, 1); + /* finish_function performs these three statements: + + expand_end_bindings (getdecls (), 1, 0); + poplevel (1, 1, 0); + + expand_end_bindings (0, 0, 0); + poplevel (0, 0, 1); + */ + if ($<ttype>$) process_next_inline ($<ttype>$); + } + | fn.def1 return_init base_init compstmt_or_error + { + finish_function (lineno, 1); + /* finish_function performs these three statements: + + expand_end_bindings (getdecls (), 1, 0); + poplevel (1, 1, 0); + + expand_end_bindings (0, 0, 0); + poplevel (0, 0, 1); + */ + if ($<ttype>$) process_next_inline ($<ttype>$); + } + | fn.def1 nodecls compstmt_or_error + { finish_function (lineno, 0); + if ($<ttype>$) process_next_inline ($<ttype>$); } + | fn.def1 return_init ';' nodecls compstmt_or_error + { finish_function (lineno, 0); + if ($<ttype>$) process_next_inline ($<ttype>$); } + | fn.def1 return_init nodecls compstmt_or_error + { finish_function (lineno, 0); + if ($<ttype>$) process_next_inline ($<ttype>$); } + | typed_declspecs declarator error + {} + | declmods notype_declarator error + {} + | notype_declarator error + {} + ; + +fn.def1: + typed_declspecs declarator maybe_raises + { if (! start_function ($$, $2, $3, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | declmods notype_declarator maybe_raises + { if (! start_function ($$, $2, $3, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | notype_declarator maybe_raises + { if (! start_function (NULL_TREE, $$, $2, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | TYPENAME '(' parmlist ')' type_quals maybe_raises + { if (! start_function (NULL_TREE, build_parse_node (CALL_EXPR, $$, $3, $5), $6, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | scoped_typename '(' parmlist ')' type_quals maybe_raises + { if (! start_function (NULL_TREE, build_parse_node (CALL_EXPR, $$, $3, $5), $6, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | TYPENAME LEFT_RIGHT type_quals maybe_raises + { if (! start_function (NULL_TREE, build_parse_node (CALL_EXPR, $$, empty_parms (), $3), $4, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | scoped_typename LEFT_RIGHT type_quals maybe_raises + { if (! start_function (NULL_TREE, build_parse_node (CALL_EXPR, $$, empty_parms (), $3), $4, 0)) + YYERROR1; + reinit_parse_for_function (); + $$ = NULL_TREE; } + | PRE_PARSED_FUNCTION_DECL + { start_function (NULL_TREE, TREE_VALUE ($$), NULL_TREE, 1); + reinit_parse_for_function (); } + ; + +/* more C++ complexity */ +fn.def2: + typed_declspecs '(' parmlist ')' type_quals maybe_raises + { + tree decl = build_parse_node (CALL_EXPR, TREE_VALUE ($$), $3, $5); + $$ = start_method (TREE_CHAIN ($$), decl, $6); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | typed_declspecs LEFT_RIGHT type_quals maybe_raises + { + tree decl = build_parse_node (CALL_EXPR, TREE_VALUE ($$), empty_parms (), $3); + $$ = start_method (TREE_CHAIN ($$), decl, $4); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | typed_declspecs declarator maybe_raises + { $$ = start_method ($$, $2, $3); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | declmods '(' parmlist ')' type_quals maybe_raises + { + tree decl = build_parse_node (CALL_EXPR, TREE_VALUE ($$), $3, $5); + $$ = start_method (TREE_CHAIN ($$), decl, $6); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | declmods LEFT_RIGHT type_quals maybe_raises + { + tree decl = build_parse_node (CALL_EXPR, TREE_VALUE ($$), empty_parms (), $3); + $$ = start_method (TREE_CHAIN ($$), decl, $4); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | declmods declarator maybe_raises + { $$ = start_method ($$, $2, $3); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + | notype_declarator maybe_raises + { $$ = start_method (NULL_TREE, $$, $2); + if (! $$) + YYERROR1; + if (yychar == YYEMPTY) + yychar = YYLEX; + reinit_parse_for_method (yychar, $$); } + ; + +return_id: RETURN IDENTIFIER + { + if (! current_function_parms_stored) + store_parm_decls (); + $$ = $2; + } + ; + +return_init: return_id + { store_return_init ($<ttype>$, NULL_TREE); } + | return_id '=' init + { store_return_init ($<ttype>$, $3); } + | return_id '(' nonnull_exprlist ')' + { store_return_init ($<ttype>$, $3); } + | return_id LEFT_RIGHT + { store_return_init ($<ttype>$, NULL_TREE); } + ; + +base_init: + ':' .set_base_init member_init_list + { + if ($3 == 0) + error ("no base initializers given following ':'"); + setup_vtbl_ptr (); + /* Always keep the BLOCK node associated with the outermost + pair of curley braces of a function. These are needed + for correct operation of dwarfout.c. */ + keep_next_level (); + } + ; + +.set_base_init: + /* empty */ + { + if (! current_function_parms_stored) + store_parm_decls (); + + /* Flag that we are processing base and member initializers. */ + current_vtable_decl = error_mark_node; + + if (DECL_CONSTRUCTOR_P (current_function_decl)) + { + /* Make a contour for the initializer list. */ + pushlevel (0); + clear_last_expr (); + expand_start_bindings (0); + } + else if (current_class_type == NULL_TREE) + error ("base initializers not allowed for non-member functions"); + else if (! DECL_CONSTRUCTOR_P (current_function_decl)) + error ("only constructors take base initializers"); + } + ; + +member_init_list: + /* empty */ + { $$ = 0; } + | member_init + { $$ = 1; } + | member_init_list ',' member_init + | member_init_list error + ; + +member_init: '(' nonnull_exprlist ')' + { + if (current_class_name && !flag_traditional) + pedwarn ("anachronistic old style base class initializer"); + expand_member_init (C_C_D, NULL_TREE, $2); + } + | LEFT_RIGHT + { + if (current_class_name && !flag_traditional) + pedwarn ("anachronistic old style base class initializer"); + expand_member_init (C_C_D, NULL_TREE, void_type_node); + } + | identifier '(' nonnull_exprlist ')' + { + expand_member_init (C_C_D, $<ttype>$, $3); + } + | identifier LEFT_RIGHT + { expand_member_init (C_C_D, $<ttype>$, void_type_node); } + | template_type_name '(' nonnull_exprlist ')' + { expand_member_init (C_C_D, $<ttype>$, $3); } + | template_type_name LEFT_RIGHT + { expand_member_init (C_C_D, $<ttype>$, void_type_node); } + | scoped_typename '(' nonnull_exprlist ')' + { expand_member_init (C_C_D, $<ttype>$, $3); } + | scoped_typename LEFT_RIGHT + { expand_member_init (C_C_D, $<ttype>$, void_type_node); } + | id_scope identifier '(' nonnull_exprlist ')' + { + do_member_init ($<ttype>$, $2, $4); + } + | id_scope identifier LEFT_RIGHT + { + do_member_init ($<ttype>$, $2, void_type_node); + } + ; + +identifier: + IDENTIFIER + | TYPENAME + | PTYPENAME + ; + +identifier_defn: + IDENTIFIER_DEFN + | TYPENAME_DEFN + | PTYPENAME_DEFN + ; + +identifier_or_opname: + IDENTIFIER + | TYPENAME + | PTYPENAME +/* | '~' TYPENAME + { $$ = build_parse_node (BIT_NOT_EXPR, $2); }*/ + /* get rid of the next line, replace it with the above */ + | '~' identifier { $$ = build_parse_node (BIT_NOT_EXPR,$2);} + | operator_name + ; + +explicit_instantiation: + TEMPLATE aggr template_type + | TEMPLATE typed_declspecs declarator + { do_function_instantiation ($2, $3); } + ; + +template_type: + template_type_name tmpl.1 template_instantiation + { + extern tree template_type_seen_before_scope; + + if ($3) + $$ = $3; + else if ($$ != error_mark_node) + $$ = IDENTIFIER_TYPE_VALUE ($$); + /* This is a kludge: In order to detect nested types inside + * template classes, we have to tell the lexer that it should + * try to replace a following SCOPE token with the correct + * SCOPED_TYPENAME for the nested type. This SCOPED_TYPENAME + * token will be handled in the rule "scoped_typename". + * - niklas@appli.se */ + if (yychar == SCOPE) + { + /* We set template_type_seen_before_scope to be + an error_mark_node so we can avoid meaningless + and unhelpful syntax errors later. */ + if ($$ != error_mark_node) + template_type_seen_before_scope = TYPE_IDENTIFIER ($$); + else + template_type_seen_before_scope = error_mark_node; + yychar = YYLEX; + } + } + ; + +template_type_name: + PTYPENAME '<' template_arg_list '>' + { $$ = lookup_template_class ($$, $3, NULL_TREE); } + | TYPENAME '<' template_arg_list '>' + { $$ = lookup_template_class ($$, $3, NULL_TREE); } + ; + +tmpl.1: + /* Expansion of template may be required, unless we're followed by + a class definition. */ + '{' { yyungetc ('{', 1); $$ = 0; } + | ':' { yyungetc (':', 1); $$ = 0; } + | /* empty */ %prec EMPTY + { $$ = instantiate_class_template ($<ttype>0, 1); } + ; + +tmpl.2: + /* Always do expansion if it hasn't been done already. */ + { $$ = instantiate_class_template ($<ttype>0, 1); } + ; + +template_arg_list: + template_arg + { $$ = build_tree_list (NULL_TREE, $$); } + | template_arg_list ',' template_arg + { $$ = chainon ($$, build_tree_list (NULL_TREE, $3)); } + ; + +template_arg: + typename + { $$ = groktypename ($$); } + | expr_no_commas %prec UNARY + ; + +template_instantiate_once: + PRE_PARSED_CLASS_DECL maybe_base_class_list + { + tree t, decl, tmpl; + + tmpl = TREE_PURPOSE (IDENTIFIER_TEMPLATE ($1)); + t = xref_tag (DECL_TEMPLATE_INFO (tmpl)->aggr, $1, $2, 0); + set_current_level_tags_transparency (1); + my_friendly_assert (TREE_CODE (t) == RECORD_TYPE + || TREE_CODE (t) == UNION_TYPE, 257); + $<ttype>$ = t; + + /* Now, put a copy of the decl in global scope, to avoid + recursive expansion. */ + decl = IDENTIFIER_LOCAL_VALUE ($1); + if (!decl) + decl = IDENTIFIER_CLASS_VALUE ($1); + /* Now, put a copy of the decl in global scope, to avoid + recursive expansion. */ + if (decl) + { + /* Need to copy it to clear the chain pointer, + and need to get it into permanent storage. */ + my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 258); + push_obstacks (&permanent_obstack, &permanent_obstack); + decl = copy_node (decl); + if (DECL_LANG_SPECIFIC (decl)) + copy_lang_decl (decl); + pop_obstacks (); + pushdecl_top_level (decl); + } + } + left_curly opt.component_decl_list '}' + { + $$ = finish_struct ($<ttype>3, $5, 0); + + pop_obstacks (); + end_template_instantiation ($1); + + /* Now go after the methods & class data. */ + instantiate_member_templates ($1); + + pop_tinst_level(); + + CLASSTYPE_GOT_SEMICOLON ($$) = 1; + } + ; + +template_instantiation: + /* empty */ + { $$ = NULL_TREE; } + | template_instantiate_once + { $$ = $1; } + ; + +template_instantiate_some: + /* empty */ + { $$ = NULL_TREE; /* never used from here... */} + | template_instantiate_once template_instantiate_some + { $$ = $1; /*???*/ } + ; + +unop: '-' + { $$ = NEGATE_EXPR; } + | '+' + { $$ = CONVERT_EXPR; } + | PLUSPLUS + { $$ = PREINCREMENT_EXPR; } + | MINUSMINUS + { $$ = PREDECREMENT_EXPR; } + | '!' + { $$ = TRUTH_NOT_EXPR; } + ; + +expr: nonnull_exprlist + { $$ = build_x_compound_expr ($$); } + /* Ugly, but faster. */ + | expr_no_commas + ; + +paren_expr_or_null: + LEFT_RIGHT + { error ("ANSI C++ forbids an empty condition for `%s'", + cond_stmt_keyword); + $$ = integer_zero_node; } + | '(' expr ')' + { $$ = $2; } + ; + +paren_cond_or_null: + LEFT_RIGHT + { error ("ANSI C++ forbids an empty condition for `%s'", + cond_stmt_keyword); + $$ = integer_zero_node; } + | '(' condition ')' + { $$ = $2; } + ; + +xcond: + /* empty */ + { $$ = NULL_TREE; } + | condition + | error + { $$ = NULL_TREE; } + ; + +condition: + typed_typespecs declarator maybe_raises maybeasm maybe_attribute '=' + { { + tree d; + for (d = getdecls (); d; d = TREE_CHAIN (d)) + if (TREE_CODE (d) == TYPE_DECL) { + tree s = TREE_TYPE (d); + if (TREE_CODE (s) == RECORD_TYPE) + cp_error ("definition of class `%T' in condition", s); + else if (TREE_CODE (s) == ENUMERAL_TYPE) + cp_error ("definition of enum `%T' in condition", s); + } + } + current_declspecs = $1; + $<itype>6 = suspend_momentary (); + $<ttype>$ = start_decl ($<ttype>2, current_declspecs, 1, $3); + cplus_decl_attributes ($<ttype>$, $5); + } + init + { + finish_decl ($<ttype>7, $8, $5, 0); + resume_momentary ($<itype>6); + $$ = $<ttype>7; + if (TREE_CODE (TREE_TYPE ($$)) == ARRAY_TYPE) + cp_error ("definition of array `%#D' in condition", $$); + } + | expr + ; + +/* Used for the blocks controlled by a condition, to add any DECLs in + the condition to the controlled block. */ +.kindof_pushlevel: /* empty */ + { tree d = getdecls (); + emit_line_note (input_filename, lineno); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + if (d) pushdecl (d); + } + ; + +/* Like implicitly_scoped_stmt, but uses .kindof_pushlevel */ +partially_scoped_stmt: + '{' .kindof_pushlevel '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); + finish_stmt (); } + | '{' .kindof_pushlevel maybe_label_decls stmts '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); + finish_stmt (); } + | '{' .kindof_pushlevel maybe_label_decls error '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + $$ = poplevel (kept_level_p (), 0, 0); + pop_momentary (); + finish_stmt (); } + | .kindof_pushlevel simple_stmt + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); } + ; + +already_scoped_stmt: + '{' '}' + { finish_stmt (); } + | '{' maybe_label_decls stmts '}' + { finish_stmt (); } + | '{' maybe_label_decls error '}' + { finish_stmt (); } + | simple_stmt + ; + +nonnull_exprlist: + expr_no_commas + { $$ = build_tree_list (NULL_TREE, $$); } + | nonnull_exprlist ',' expr_no_commas + { chainon ($$, build_tree_list (NULL_TREE, $3)); } + | nonnull_exprlist ',' error + { chainon ($$, build_tree_list (NULL_TREE, error_mark_node)); } + ; + +unary_expr: + primary %prec UNARY + { + if (TREE_CODE ($$) == TYPE_EXPR) + $$ = build_component_type_expr (C_C_D, $$, NULL_TREE, 1); + } + /* __extension__ turns off -pedantic for following primary. */ + | EXTENSION + { $<itype>1 = pedantic; + pedantic = 0; } + cast_expr %prec UNARY + { $$ = $3; + pedantic = $<itype>1; } + | '*' cast_expr %prec UNARY + { $$ = build_x_indirect_ref ($2, "unary *"); } + | '&' cast_expr %prec UNARY + { $$ = build_x_unary_op (ADDR_EXPR, $2); } + | '~' cast_expr %prec UNARY + { $$ = build_x_unary_op (BIT_NOT_EXPR, $2); } + | unop cast_expr %prec UNARY + { $$ = build_x_unary_op ((enum tree_code) $$, $2); + if ($1 == NEGATE_EXPR && TREE_CODE ($2) == INTEGER_CST) + TREE_NEGATED_INT ($$) = 1; + overflow_warning ($$); + } + /* Refer to the address of a label as a pointer. */ + | ANDAND identifier + { tree label = lookup_label ($2); + if (label == NULL_TREE) + $$ = null_pointer_node; + else + { + TREE_USED (label) = 1; + $$ = build1 (ADDR_EXPR, ptr_type_node, label); + TREE_CONSTANT ($$) = 1; + } + } + | SIZEOF unary_expr %prec UNARY + { if (TREE_CODE ($2) == COMPONENT_REF + && DECL_BIT_FIELD (TREE_OPERAND ($2, 1))) + error ("sizeof applied to a bit-field"); + /* ANSI says arrays and functions are converted inside comma. + But we can't really convert them in build_compound_expr + because that would break commas in lvalues. + So do the conversion here if operand was a comma. */ + if (TREE_CODE ($2) == COMPOUND_EXPR + && (TREE_CODE (TREE_TYPE ($2)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE ($2)) == FUNCTION_TYPE)) + $2 = default_conversion ($2); + else if (TREE_CODE ($2) == TREE_LIST) + { + tree t = TREE_VALUE ($2); + if (t != NULL_TREE + && TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids using sizeof() on a function"); + } + $$ = c_sizeof (TREE_TYPE ($2)); } + | SIZEOF '(' typename ')' %prec HYPERUNARY + { $$ = c_sizeof (groktypename ($3)); } + | ALIGNOF unary_expr %prec UNARY + { $$ = grok_alignof ($2); } + | ALIGNOF '(' typename ')' %prec HYPERUNARY + { $$ = c_alignof (groktypename ($3)); } + + | .scope new typename %prec '=' + { $$ = build_new ($2, $3, NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' typename %prec '=' + { $$ = build_new ($4, $6, NULL_TREE, $$ != NULL_TREE); } + | .scope new typespec '(' nonnull_exprlist ')' + { $$ = build_new ($2, $3, $5, $$ != NULL_TREE); } + | .scope new typespec '(' typespec ')' + { cp_error ("`%T' is not a valid expression", $5); + $$ = error_mark_node; } + | .scope new '(' nonnull_exprlist ')' typespec '(' nonnull_exprlist ')' + { $$ = build_new ($4, $6, $8, $$ != NULL_TREE); } + | .scope new typespec LEFT_RIGHT + { $$ = build_new ($2, $3, NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' typespec LEFT_RIGHT + { $$ = build_new ($4, $6, NULL_TREE, $$ != NULL_TREE); } + | .scope new typename '=' init %prec '=' + { $$ = build_new ($2, $3, $5, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' typename '=' init %prec '=' + { $$ = build_new ($4, $6, $8, $$ != NULL_TREE); } + + /* I am not going to add placement syntax to the below complex rules + because Ken says the syntax is illegal. (mrs) */ + /* I'm not sure why this is disallowed. But since it is, and it + doesn't seem difficult to catch it, let's give a message, so + the programmer can fix it. --Ken Raeburn */ + | .scope new '(' typed_typespecs absdcl ')' '[' nonmomentary_expr ']' + { + tree absdcl, typename; + + illegal_new_array: + absdcl = build_parse_node (ARRAY_REF, $5, $8); + typename = build_decl_list ($4, absdcl); + pedwarn ("ANSI C++ forbids array dimensions with parenthesized type"); + $$ = build_new ($2, typename, NULL_TREE, $$ != NULL_TREE); + } + | .scope new '(' nonempty_type_quals absdcl ')' '[' nonmomentary_expr ']' + { goto illegal_new_array; } + + | .scope new '(' typed_typespecs absdcl ')' + { $$ = build_new ($2, build_decl_list ($4, $5), NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' '(' typed_typespecs absdcl ')' + { $$ = build_new ($4, build_decl_list ($7, $8), NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonempty_type_quals absdcl ')' + { $$ = build_new ($2, build_decl_list ($4, $5), NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' '(' nonempty_type_quals absdcl ')' + { $$ = build_new ($4, build_decl_list ($7, $8), NULL_TREE, $$ != NULL_TREE); } + /* Unswallow a ':' which is probably meant for ?: expression. */ + | .scope new TYPENAME_COLON + { yyungetc (':', 1); $$ = build_new ($2, $3, NULL_TREE, $$ != NULL_TREE); } + | .scope new '(' nonnull_exprlist ')' TYPENAME_COLON + { yyungetc (':', 1); $$ = build_new ($4, $6, NULL_TREE, $$ != NULL_TREE); } + + | delete cast_expr %prec UNARY + { $$ = delete_sanity ($2, NULL_TREE, 0, $$ != NULL_TREE); } + | delete '[' ']' cast_expr %prec UNARY + { $$ = delete_sanity ($4, NULL_TREE, 1, $$ != NULL_TREE); + if (yychar == YYEMPTY) + yychar = YYLEX; } + | delete '[' expr ']' cast_expr %prec UNARY + { $$ = delete_sanity ($5, $3, 2, $$ != NULL_TREE); + if (yychar == YYEMPTY) + yychar = YYLEX; } + ; + +cast_expr: + unary_expr + | '(' typename ')' expr_no_commas %prec UNARY + { tree type = groktypename ($2); + $$ = build_c_cast (type, $4); } + | '(' typename ')' '{' initlist maybecomma '}' %prec UNARY + { tree type = groktypename ($2); + + if (IS_SIGNATURE (type)) + { + error ("cast specifies signature type"); + $$ = error_mark_node; + } + else + { + tree init; + init = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($5)); + if (pedantic) + pedwarn ("ANSI C++ forbids constructor-expressions"); + /* Indicate that this was a GNU C constructor expression. */ + TREE_HAS_CONSTRUCTOR (init) = 1; + $$ = digest_init (type, init, (tree *) 0); + if (TREE_CODE (type) == ARRAY_TYPE + && TYPE_SIZE (type) == 0) + { + int failure = complete_array_type (type, $$, 1); + if (failure) + my_friendly_abort (78); + } + } + } + | HEADOF '(' expr ')' + { $$ = build_headof ($3); } + | CLASSOF '(' expr ')' + { $$ = build_classof ($3); } + | CLASSOF '(' TYPENAME ')' + { if (is_aggr_typedef ($3, 1)) + { + tree type = IDENTIFIER_TYPE_VALUE ($3); + if (! IS_SIGNATURE(type)) + $$ = CLASSTYPE_DOSSIER (type); + else + { + sorry ("signature name as argument of `classof'"); + $$ = error_mark_node; + } + } + else + $$ = error_mark_node; + } + ; + +expr_no_commas: + cast_expr + | expr_no_commas '+' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '-' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '*' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '/' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '%' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas LSHIFT expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas RSHIFT expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas ARITHCOMPARE expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '<' expr_no_commas + { $$ = build_x_binary_op (LT_EXPR, $$, $3); } + | expr_no_commas '>' expr_no_commas + { $$ = build_x_binary_op (GT_EXPR, $$, $3); } + | expr_no_commas EQCOMPARE expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas MIN_MAX expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '&' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '|' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas '^' expr_no_commas + { $$ = build_x_binary_op ($2, $$, $3); } + | expr_no_commas ANDAND expr_no_commas + { $$ = build_x_binary_op (TRUTH_ANDIF_EXPR, $$, $3); } + | expr_no_commas OROR expr_no_commas + { $$ = build_x_binary_op (TRUTH_ORIF_EXPR, $$, $3); } + | expr_no_commas '?' xexpr ':' expr_no_commas + { $$ = build_x_conditional_expr ($$, $3, $5); } + | expr_no_commas '=' expr_no_commas + { $$ = build_modify_expr ($$, NOP_EXPR, $3); } + | expr_no_commas ASSIGN expr_no_commas + { register tree rval; + if (rval = build_opfncall (MODIFY_EXPR, LOOKUP_NORMAL, $$, $3, + make_node ($2))) + $$ = rval; + else + $$ = build_modify_expr ($$, $2, $3); } + | primary DOT_STAR expr_no_commas %prec UNARY + { $$ = build_m_component_ref ($$, $3); } + /* Handle general members. */ + | object_star expr_no_commas %prec UNARY + { $$ = build_x_binary_op (MEMBER_REF, $$, $2); } +/* These extensions are not defined. The second arg to build_m_component_ref + is old, build_m_component_ref now does an implicit + build_indirect_ref (x, NULL_PTR) on the second argument. + | object '&' expr_no_commas %prec UNARY + { $$ = build_m_component_ref ($$, build_x_unary_op (ADDR_EXPR, $3)); } + | object unop expr_no_commas %prec UNARY + { $$ = build_m_component_ref ($$, build_x_unary_op ($2, $3)); } + | object '(' typename ')' expr_no_commas %prec UNARY + { tree type = groktypename ($3); + $$ = build_m_component_ref ($$, build_c_cast (type, $5)); } + | object primary_no_id %prec UNARY + { $$ = build_m_component_ref ($$, $2); } +*/ + ; + +primary: + IDENTIFIER + { $$ = do_identifier ($$); } + | operator_name + { + tree op = $$; + if (TREE_CODE (op) != IDENTIFIER_NODE) + $$ = op; + else + { + $$ = lookup_name (op, 0); + if ($$ == NULL_TREE) + { + if (op != ansi_opname[ERROR_MARK]) + error ("operator %s not defined", + operator_name_string (op)); + $$ = error_mark_node; + } + } + } + | CONSTANT + | string + { $$ = combine_strings ($$); } + | '(' expr ')' + { $$ = $2; } + | '(' error ')' + { $$ = error_mark_node; } + | '(' + { if (current_function_decl == 0) + { + error ("braced-group within expression allowed only inside a function"); + YYERROR; + } + keep_next_level (); + $<ttype>$ = expand_start_stmt_expr (); } + compstmt ')' + { tree rtl_exp; + if (pedantic) + pedwarn ("ANSI C++ forbids braced-groups within expressions"); + rtl_exp = expand_end_stmt_expr ($<ttype>2); + /* The statements have side effects, so the group does. */ + TREE_SIDE_EFFECTS (rtl_exp) = 1; + + if (TREE_CODE ($3) == BLOCK) + { + /* Make a BIND_EXPR for the BLOCK already made. */ + $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp), + NULL_TREE, rtl_exp, $3); + /* Remove the block from the tree at this point. + It gets put back at the proper place + when the BIND_EXPR is expanded. */ + delete_block ($3); + } + else + $$ = $3; + } + | primary '(' nonnull_exprlist ')' + { /* [eichin:19911016.1902EST] */ + $<ttype>$ = build_x_function_call ($1, $3, current_class_decl); + /* here we instantiate_class_template as needed... */ + do_pending_templates (); + } template_instantiate_some { + if (TREE_CODE ($<ttype>5) == CALL_EXPR + && TREE_TYPE ($<ttype>5) != void_type_node) + $$ = require_complete_type ($<ttype>5); + else + $$ = $<ttype>5; + } + | primary LEFT_RIGHT + { + $$ = build_x_function_call ($$, NULL_TREE, current_class_decl); + if (TREE_CODE ($$) == CALL_EXPR + && TREE_TYPE ($$) != void_type_node) + $$ = require_complete_type ($$); + } + | primary '[' expr ']' + { do_array: + $$ = grok_array_decl ($$, $3); } + | object identifier_or_opname %prec UNARY + { $$ = build_component_ref ($$, $2, NULL_TREE, 1); } + | object id_scope identifier_or_opname %prec UNARY + { $$ = build_object_ref ($$, $2, $3); } + | primary PLUSPLUS + { /* If we get an OFFSET_REF, turn it into what it really + means (e.g., a COMPONENT_REF). This way if we've got, + say, a reference to a static member that's being operated + on, we don't end up trying to find a member operator for + the class it's in. */ + if (TREE_CODE ($$) == OFFSET_REF) + $$ = resolve_offset_ref ($$); + $$ = build_x_unary_op (POSTINCREMENT_EXPR, $$); } + | primary MINUSMINUS + { if (TREE_CODE ($$) == OFFSET_REF) + $$ = resolve_offset_ref ($$); + $$ = build_x_unary_op (POSTDECREMENT_EXPR, $$); } + /* C++ extensions */ + | THIS + { if (current_class_decl) + { +#ifdef WARNING_ABOUT_CCD + TREE_USED (current_class_decl) = 1; +#endif + $$ = current_class_decl; + } + else if (current_function_decl + && DECL_STATIC_FUNCTION_P (current_function_decl)) + { + error ("`this' is unavailable for static member functions"); + $$ = error_mark_node; + } + else + { + if (current_function_decl) + error ("invalid use of `this' in non-member function"); + else + error ("invalid use of `this' at top level"); + $$ = error_mark_node; + } + } + | TYPE_QUAL '(' nonnull_exprlist ')' + { + tree type; + tree id = $$; + + /* This is a C cast in C++'s `functional' notation. */ + if ($3 == error_mark_node) + { + $$ = error_mark_node; + break; + } +#if 0 + if ($3 == NULL_TREE) + { + error ("cannot cast null list to type `%s'", + IDENTIFIER_POINTER (TYPE_NAME (id))); + $$ = error_mark_node; + break; + } +#endif +#if 0 + /* type is not set! (mrs) */ + if (type == error_mark_node) + $$ = error_mark_node; + else +#endif + { + if (id == ridpointers[(int) RID_CONST]) + type = build_type_variant (integer_type_node, 1, 0); + else if (id == ridpointers[(int) RID_VOLATILE]) + type = build_type_variant (integer_type_node, 0, 1); +#if 0 + /* should not be able to get here (mrs) */ + else if (id == ridpointers[(int) RID_FRIEND]) + { + error ("cannot cast expression to `friend' type"); + $$ = error_mark_node; + break; + } +#endif + else my_friendly_abort (79); + $$ = build_c_cast (type, build_compound_expr ($3)); + } + } + | typespec '(' nonnull_exprlist ')' + { $$ = build_functional_cast ($$, $3); } + | typespec LEFT_RIGHT + { $$ = build_functional_cast ($$, NULL_TREE); } + /* Stroustrup RTTI */ + | DYNAMIC_CAST '<' typename '>' '(' expr ')' + { tree type = groktypename ($3); + $$ = build_dynamic_cast (type, $6); } + | TYPEID '(' expr ')' + { $$ = build_typeid ($3); } + | TYPEID '(' typename ')' + { tree type = groktypename ($3); + $$ = get_typeid (type); } + | SCOPE typespec '(' nonnull_exprlist ')' + { $$ = build_functional_cast ($2, $4); } + | SCOPE typespec LEFT_RIGHT + { $$ = build_functional_cast ($2, NULL_TREE); } + | SCOPE IDENTIFIER + { + do_scoped_id: + $$ = IDENTIFIER_GLOBAL_VALUE ($2); + if (yychar == YYEMPTY) + yychar = YYLEX; + if (! $$) + { + if (yychar == '(' || yychar == LEFT_RIGHT) + $$ = implicitly_declare ($2); + else + { + if (IDENTIFIER_GLOBAL_VALUE ($2) != error_mark_node) + error ("undeclared variable `%s' (first use here)", + IDENTIFIER_POINTER ($2)); + $$ = error_mark_node; + /* Prevent repeated error messages. */ + IDENTIFIER_GLOBAL_VALUE ($2) = error_mark_node; + } + } + else + { + if (TREE_CODE ($$) == ADDR_EXPR) + assemble_external (TREE_OPERAND ($$, 0)); + else + assemble_external ($$); + TREE_USED ($$) = 1; + } + if (TREE_CODE ($$) == CONST_DECL) + { + /* XXX CHS - should we set TREE_USED of the constant? */ + $$ = DECL_INITIAL ($$); + /* This is to prevent an enum whose value is 0 + from being considered a null pointer constant. */ + $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$); + TREE_CONSTANT ($$) = 1; + } + + } + | SCOPE operator_name + { + if (TREE_CODE ($2) == IDENTIFIER_NODE) + goto do_scoped_id; + do_scoped_operator: + $$ = $2; + } + | id_scope identifier_or_opname %prec HYPERUNARY + { $$ = build_offset_ref ($$, $2); } + | id_scope identifier_or_opname '(' nonnull_exprlist ')' + { $$ = build_member_call ($$, $2, $4); } + | id_scope identifier_or_opname LEFT_RIGHT + { $$ = build_member_call ($$, $2, NULL_TREE); } + | object identifier_or_opname '(' nonnull_exprlist ')' + { +#if 0 + /* This is a future direction of this code, but because + build_x_function_call cannot always undo what is done + in build_component_ref entirely yet, we cannot do this. */ + $$ = build_x_function_call (build_component_ref ($$, $2, NULL_TREE, 1), $4, $$); + if (TREE_CODE ($$) == CALL_EXPR + && TREE_TYPE ($$) != void_type_node) + $$ = require_complete_type ($$); +#else + $$ = build_method_call ($$, $2, $4, NULL_TREE, + (LOOKUP_NORMAL|LOOKUP_AGGR)); +#endif + } + | object identifier_or_opname LEFT_RIGHT + { +#if 0 + /* This is a future direction of this code, but because + build_x_function_call cannot always undo what is done + in build_component_ref entirely yet, we cannot do this. */ + $$ = build_x_function_call (build_component_ref ($$, $2, NULL_TREE, 1), NULL_TREE, $$); + if (TREE_CODE ($$) == CALL_EXPR + && TREE_TYPE ($$) != void_type_node) + $$ = require_complete_type ($$); +#else + $$ = build_method_call ($$, $2, NULL_TREE, NULL_TREE, + (LOOKUP_NORMAL|LOOKUP_AGGR)); +#endif + } + | object id_scope identifier_or_opname '(' nonnull_exprlist ')' + { + if (IS_SIGNATURE (IDENTIFIER_TYPE_VALUE ($2))) + { + warning ("signature name in scope resolution ignored"); + $$ = build_method_call ($$, $3, $5, NULL_TREE, + (LOOKUP_NORMAL|LOOKUP_AGGR)); + } + else + $$ = build_scoped_method_call ($$, $2, $3, $5); + } + | object id_scope identifier_or_opname LEFT_RIGHT + { + if (IS_SIGNATURE (IDENTIFIER_TYPE_VALUE ($2))) + { + warning ("signature name in scope resolution ignored"); + $$ = build_method_call ($$, $3, NULL_TREE, NULL_TREE, + (LOOKUP_NORMAL|LOOKUP_AGGR)); + } + else + $$ = build_scoped_method_call ($$, $2, $3, NULL_TREE); + } + /* p->int::~int() is valid -- 12.4 */ + | object '~' TYPESPEC LEFT_RIGHT + { + if (TREE_CODE (TREE_TYPE ($1)) + != TREE_CODE (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE ($3)))) + cp_error ("`%E' is not of type `%T'", $1, $3); + $$ = void_zero_node; + } + | object TYPESPEC SCOPE '~' TYPESPEC LEFT_RIGHT + { + if ($2 != $5) + cp_error ("destructor specifier `%T::~%T()' must have matching names", $2, $5); + if (TREE_CODE (TREE_TYPE ($1)) + != TREE_CODE (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE ($2)))) + cp_error ("`%E' is not of type `%T'", $1, $2); + $$ = void_zero_node; + } + ; + +/* Not needed for now. + +primary_no_id: + '(' expr ')' + { $$ = $2; } + | '(' error ')' + { $$ = error_mark_node; } + | '(' + { if (current_function_decl == 0) + { + error ("braced-group within expression allowed only inside a function"); + YYERROR; + } + $<ttype>$ = expand_start_stmt_expr (); } + compstmt ')' + { if (pedantic) + pedwarn ("ANSI C++ forbids braced-groups within expressions"); + $$ = expand_end_stmt_expr ($<ttype>2); } + | primary_no_id '(' nonnull_exprlist ')' + { $$ = build_x_function_call ($$, $3, current_class_decl); } + | primary_no_id LEFT_RIGHT + { $$ = build_x_function_call ($$, NULL_TREE, current_class_decl); } + | primary_no_id '[' expr ']' + { goto do_array; } + | primary_no_id PLUSPLUS + { $$ = build_x_unary_op (POSTINCREMENT_EXPR, $$); } + | primary_no_id MINUSMINUS + { $$ = build_x_unary_op (POSTDECREMENT_EXPR, $$); } + | SCOPE IDENTIFIER + { goto do_scoped_id; } + | SCOPE operator_name + { if (TREE_CODE ($2) == IDENTIFIER_NODE) + goto do_scoped_id; + goto do_scoped_operator; + } + ; +*/ + +new: NEW + { $$ = NULL_TREE; } + | NEW '{' nonnull_exprlist '}' + { + $$ = $3; + pedwarn ("old style placement syntax, use () instead"); + } + ; + +.scope: + /* empty */ + { $$ = 0; } + | SCOPE + { $$ = 1; } + ; + +delete: DELETE + { $$ = NULL_TREE; } + | SCOPE delete + { if ($2) + error ("extra `::' before `delete' ignored"); + $$ = error_mark_node; + } + ; + +/* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */ +string: + STRING + | string STRING + { $$ = chainon ($$, $2); } + ; + +nodecls: + /* empty */ + { + if (! current_function_parms_stored) + store_parm_decls (); + setup_vtbl_ptr (); + /* Always keep the BLOCK node associated with the outermost + pair of curley braces of a function. These are needed + for correct operation of dwarfout.c. */ + keep_next_level (); + } + ; + +object: primary '.' + | primary POINTSAT + { + $$ = build_x_arrow ($$); + } + ; + +object_star: primary POINTSAT_STAR + ; + +decl: + typed_declspecs initdecls ';' + { + resume_momentary ($2); + note_list_got_semicolon ($<ttype>$); + } + /* Normal case: make this fast. */ + | typed_declspecs declarator ';' + { tree d; + int yes = suspend_momentary (); + d = start_decl ($<ttype>2, $<ttype>$, 0, NULL_TREE); + finish_decl (d, NULL_TREE, NULL_TREE, 0); + resume_momentary (yes); + note_list_got_semicolon ($<ttype>$); + } + | declmods notype_initdecls ';' + { resume_momentary ((int) $<itype>2); } + /* Normal case: make this fast. */ + | declmods declarator ';' + { tree d; + int yes = suspend_momentary (); + d = start_decl ($<ttype>2, $<ttype>$, 0, NULL_TREE); + finish_decl (d, NULL_TREE, NULL_TREE, 0); + resume_momentary (yes); + } + | typed_declspecs ';' + { + shadow_tag ($<ttype>$); + note_list_got_semicolon ($<ttype>$); + } + | declmods ';' + { warning ("empty declaration"); } + ; + +/* Any kind of declarator (thus, all declarators allowed + after an explicit typespec). */ + +declarator: + after_type_declarator + | notype_declarator + | START_DECLARATOR after_type_declarator + { $$ = $2; } + | START_DECLARATOR notype_declarator + { $$ = $2; } + ; + +/* Declspecs which contain at least one type specifier or typedef name. + (Just `const' or `volatile' is not enough.) + A typedef'd name following these is taken as a name to be declared. */ + +typed_declspecs: + typespec %prec HYPERUNARY + { if ($$) $$ = list_hash_lookup_or_cons ($$); } + | declmods typespec + { $$ = hash_tree_chain ($2, $$); } + | typespec reserved_declspecs %prec HYPERUNARY + { $$ = hash_tree_chain ($$, $2); } + | declmods typespec reserved_declspecs + { $$ = hash_tree_chain ($2, hash_chainon ($3, $$)); } + ; + +reserved_declspecs: /* empty + { $$ = NULL_TREE; } */ + typespecqual_reserved + { $$ = build_decl_list (NULL_TREE, $$); } + | SCSPEC + { if (extra_warnings) + warning ("`%s' is not at beginning of declaration", + IDENTIFIER_POINTER ($$)); + $$ = build_decl_list (NULL_TREE, $$); } + | reserved_declspecs typespecqual_reserved + { $$ = decl_tree_cons (NULL_TREE, $2, $$); } + | reserved_declspecs SCSPEC + { if (extra_warnings) + warning ("`%s' is not at beginning of declaration", + IDENTIFIER_POINTER ($2)); + $$ = decl_tree_cons (NULL_TREE, $2, $$); } + ; + +/* List of just storage classes and type modifiers. + A declaration can start with just this, but then it cannot be used + to redeclare a typedef-name. */ + +declmods: + TYPE_QUAL + { $$ = IDENTIFIER_AS_LIST ($$); + TREE_STATIC ($$) = 1; } + | SCSPEC + { $$ = IDENTIFIER_AS_LIST ($$); } + | declmods TYPE_QUAL + { $$ = hash_tree_chain ($2, $$); + TREE_STATIC ($$) = 1; } + | declmods SCSPEC + { if (extra_warnings && TREE_STATIC ($$)) + warning ("`%s' is not at beginning of declaration", + IDENTIFIER_POINTER ($2)); + $$ = hash_tree_chain ($2, $$); + TREE_STATIC ($$) = TREE_STATIC ($1); } + ; + + +/* Used instead of declspecs where storage classes are not allowed + (that is, for typenames and structure components). + + C++ can takes storage classes for structure components. + Don't accept a typedef-name if anything but a modifier precedes it. */ + +typed_typespecs: + typespec %prec EMPTY + { $$ = get_decl_list ($$); } + | nonempty_type_quals typespec + { $$ = decl_tree_cons (NULL_TREE, $2, $$); } + | typespec reserved_typespecquals + { $$ = decl_tree_cons (NULL_TREE, $$, $2); } + | nonempty_type_quals typespec reserved_typespecquals + { $$ = decl_tree_cons (NULL_TREE, $2, hash_chainon ($3, $$)); } + ; + +reserved_typespecquals: + typespecqual_reserved + { $$ = get_decl_list ($$); } + | reserved_typespecquals typespecqual_reserved + { $$ = decl_tree_cons (NULL_TREE, $2, $$); } + ; + +/* A typespec (but not a type qualifier). + Once we have seen one of these in a declaration, + if a typedef name appears then it is being redeclared. */ + +typespec: structsp + | TYPESPEC %prec EMPTY + | TYPENAME %prec EMPTY + | scoped_typename + | TYPEOF '(' expr ')' + { $$ = TREE_TYPE ($3); + if (pedantic) + pedwarn ("ANSI C++ forbids `typeof'"); } + | TYPEOF '(' typename ')' + { $$ = groktypename ($3); + if (pedantic) + pedwarn ("ANSI C++ forbids `typeof'"); } + | SIGOF '(' expr ')' + { tree type = TREE_TYPE ($3); + + if (IS_AGGR_TYPE (type)) + { + sorry ("sigof type specifier"); + $$ = type; + } + else + { + error ("`sigof' applied to non-aggregate expression"); + $$ = error_mark_node; + } + } + | SIGOF '(' typename ')' + { tree type = groktypename ($3); + + if (IS_AGGR_TYPE (type)) + { + sorry ("sigof type specifier"); + $$ = type; + } + else + { + error("`sigof' applied to non-aggregate type"); + $$ = error_mark_node; + } + } + | template_type %prec EMPTY + ; + +/* A typespec that is a reserved word, or a type qualifier. */ + +typespecqual_reserved: TYPESPEC + | TYPE_QUAL + | structsp + ; + +initdecls: + initdcl0 + | initdecls ',' initdcl + ; + +notype_initdecls: + notype_initdcl0 + | notype_initdecls ',' initdcl + ; + +maybeasm: + /* empty */ + { $$ = NULL_TREE; } + | asm_keyword '(' string ')' + { if (TREE_CHAIN ($3)) $3 = combine_strings ($3); $$ = $3; } + ; + +initdcl0: + declarator maybe_raises maybeasm maybe_attribute '=' + { current_declspecs = $<ttype>0; + $<itype>5 = suspend_momentary (); + $<ttype>$ = start_decl ($<ttype>1, current_declspecs, 1, $2); + cplus_decl_attributes ($<ttype>$, $4); } + init +/* Note how the declaration of the variable is in effect while its init is parsed! */ + { finish_decl ($<ttype>6, $7, $3, 0); + $$ = $<itype>5; } + | declarator maybe_raises maybeasm maybe_attribute + { tree d; + current_declspecs = $<ttype>0; + $$ = suspend_momentary (); + d = start_decl ($<ttype>1, current_declspecs, 0, $2); + cplus_decl_attributes (d, $4); + finish_decl (d, NULL_TREE, $3, 0); } + ; + +initdcl: + declarator maybe_raises maybeasm maybe_attribute '=' + { $<ttype>$ = start_decl ($<ttype>1, current_declspecs, 1, $2); + cplus_decl_attributes ($<ttype>$, $4); } + init +/* Note how the declaration of the variable is in effect while its init is parsed! */ + { finish_decl ($<ttype>6, $7, $3, 0); } + | declarator maybe_raises maybeasm maybe_attribute + { tree d = start_decl ($<ttype>1, current_declspecs, 0, $2); + cplus_decl_attributes ($<ttype>$, $4); + finish_decl (d, NULL_TREE, $3, 0); } + ; + +notype_initdcl0: + notype_declarator maybe_raises maybeasm maybe_attribute '=' + { current_declspecs = $<ttype>0; + $<itype>5 = suspend_momentary (); + $<ttype>$ = start_decl ($<ttype>1, current_declspecs, 1, $2); + cplus_decl_attributes ($<ttype>$, $4); } + init +/* Note how the declaration of the variable is in effect while its init is parsed! */ + { finish_decl ($<ttype>6, $7, $3, 0); + $$ = $<itype>5; } + | notype_declarator maybe_raises maybeasm maybe_attribute + { tree d; + current_declspecs = $<ttype>0; + $$ = suspend_momentary (); + d = start_decl ($<ttype>1, current_declspecs, 0, $2); + cplus_decl_attributes (d, $4); + finish_decl (d, NULL_TREE, $3, 0); } + ; + +/* the * rules are dummies to accept the Apollo extended syntax + so that the header files compile. */ +maybe_attribute: + /* empty */ + { $$ = NULL_TREE; } + | maybe_attribute ATTRIBUTE '(' '(' attribute_list ')' ')' + { $$ = chainon ($5, $1); } + ; + +attribute_list + : attrib + { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); } + | attribute_list ',' attrib + { $$ = tree_cons (NULL_TREE, $3, $1); } + ; + +attrib + : TYPE_QUAL + | IDENTIFIER + { if (strcmp (IDENTIFIER_POINTER ($1), "packed") + && strcmp (IDENTIFIER_POINTER ($1), "noreturn")) + warning ("`%s' attribute directive ignored", + IDENTIFIER_POINTER ($1)); + $$ = $1; } + | IDENTIFIER '(' IDENTIFIER ')' + { /* If not "mode (m)", then issue warning. */ + if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0) + { + warning ("`%s' attribute directive ignored", + IDENTIFIER_POINTER ($1)); + $$ = $1; + } + else + $$ = tree_cons ($1, $3, NULL_TREE); } + | IDENTIFIER '(' CONSTANT ')' + { /* if not "aligned(n)", then issue warning */ + if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0 + || TREE_CODE ($3) != INTEGER_CST) + { + warning ("`%s' attribute directive ignored", + IDENTIFIER_POINTER ($1)); + $$ = $1; + } + else + $$ = tree_cons ($1, $3, NULL_TREE); } + | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')' + { /* if not "format(...)", then issue warning */ + if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0 + || TREE_CODE ($5) != INTEGER_CST + || TREE_CODE ($7) != INTEGER_CST) + { + warning ("`%s' attribute directive ignored", + IDENTIFIER_POINTER ($1)); + $$ = $1; + } + else + $$ = tree_cons ($1, tree_cons ($3, tree_cons ($5, $7, NULL_TREE), NULL_TREE), NULL_TREE); } + ; + +/* A nonempty list of identifiers, including typenames. */ +identifiers_or_typenames: + identifier + { $$ = build_tree_list (NULL_TREE, $1); } + | identifiers_or_typenames ',' identifier + { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); } + ; + +init: + expr_no_commas %prec '=' + | '{' '}' + { $$ = build_nt (CONSTRUCTOR, NULL_TREE, NULL_TREE); + TREE_HAS_CONSTRUCTOR ($$) = 1; + if (pedantic) + pedwarn ("ANSI C++ forbids empty initializer braces"); } + | '{' initlist '}' + { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); + TREE_HAS_CONSTRUCTOR ($$) = 1; } + | '{' initlist ',' '}' + { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); + TREE_HAS_CONSTRUCTOR ($$) = 1; } + | error + { $$ = NULL_TREE; } + ; + +/* This chain is built in reverse order, + and put in forward order where initlist is used. */ +initlist: + init + { $$ = build_tree_list (NULL_TREE, $$); } + | initlist ',' init + { $$ = tree_cons (NULL_TREE, $3, $$); } + /* These are for labeled elements. */ + | '[' expr_no_commas ']' init + { $$ = build_tree_list ($2, $4); } + | initlist ',' CASE expr_no_commas ':' init + { $$ = tree_cons ($4, $6, $$); } + | identifier ':' init + { $$ = build_tree_list ($$, $3); } + | initlist ',' identifier ':' init + { $$ = tree_cons ($3, $5, $$); } + ; + +structsp: + ENUM identifier '{' + { $<itype>3 = suspend_momentary (); + $$ = start_enum ($2); } + enumlist maybecomma_warn '}' + { $$ = finish_enum ($<ttype>4, $5); + resume_momentary ((int) $<itype>3); + check_for_missing_semicolon ($<ttype>4); } + | ENUM identifier '{' '}' + { $$ = finish_enum (start_enum ($2), NULL_TREE); + check_for_missing_semicolon ($$); } + | ENUM '{' + { $<itype>2 = suspend_momentary (); + $$ = start_enum (make_anon_name ()); } + enumlist maybecomma_warn '}' + { $$ = finish_enum ($<ttype>3, $4); + resume_momentary ((int) $<itype>1); + check_for_missing_semicolon ($<ttype>3); } + | ENUM '{' '}' + { $$ = finish_enum (start_enum (make_anon_name()), NULL_TREE); + check_for_missing_semicolon ($$); } + | ENUM identifier + { $$ = xref_tag (enum_type_node, $2, NULL_TREE, 0); } + + /* C++ extensions, merged with C to avoid shift/reduce conflicts */ + | class_head left_curly opt.component_decl_list '}' + { + int semi; + tree id; + +#if 0 + /* Need to rework class nesting in the + presence of nested classes, etc. */ + shadow_tag (CLASSTYPE_AS_LIST ($$)); */ +#endif + if (yychar == YYEMPTY) + yychar = YYLEX; + semi = yychar == ';'; + /* finish_struct nukes this anyway; if + finish_exception does too, then it can go. */ + if (semi) + note_got_semicolon ($$); + + if (TREE_CODE ($$) == ENUMERAL_TYPE) + /* $$ = $1 from default rule. */; + else if (CLASSTYPE_DECLARED_EXCEPTION ($$)) + { + if (! semi) + $$ = finish_exception ($$, $3); + else + warning ("empty exception declaration\n"); + } + else + { + $$ = finish_struct ($$, $3, semi); + if (semi) note_got_semicolon ($$); + } + + pop_obstacks (); + + id = TYPE_IDENTIFIER ($$); + if (id && IDENTIFIER_TEMPLATE (id)) + { + tree decl; + + /* I don't know if the copying of this TYPE_DECL is + * really needed. However, it's such a small per- + * formance penalty that the extra safety is a bargain. + * - niklas@appli.se + */ + push_obstacks (&permanent_obstack, &permanent_obstack); + decl = copy_node (lookup_name (id, 0)); + if (DECL_LANG_SPECIFIC (decl)) + copy_lang_decl (decl); + pop_obstacks (); + undo_template_name_overload (id, 0); + pushdecl_top_level (decl); + } + if (! semi) + check_for_missing_semicolon ($$); } + | class_head %prec EMPTY + { +#if 0 + /* It's no longer clear what the following error is supposed to + accomplish. If it turns out to be needed, add a comment why. */ + if (TYPE_BINFO_BASETYPES ($$) && !TYPE_SIZE ($$)) + { + error ("incomplete definition of type `%s'", + TYPE_NAME_STRING ($$)); + $$ = error_mark_node; + } +#endif + } + ; + +maybecomma: + /* empty */ + | ',' + ; + +maybecomma_warn: + /* empty */ + | ',' + { if (pedantic) pedwarn ("comma at end of enumerator list"); } + ; + +aggr: AGGR + | aggr SCSPEC + { error ("storage class specifier `%s' not allowed after struct or class", IDENTIFIER_POINTER ($2)); } + | aggr TYPESPEC + { error ("type specifier `%s' not allowed after struct or class", IDENTIFIER_POINTER ($2)); } + | aggr TYPE_QUAL + { error ("type qualifier `%s' not allowed after struct or class", IDENTIFIER_POINTER ($2)); } + | aggr AGGR + { error ("no body nor ';' separates two class, struct or union declarations"); } + ; + +named_class_head_sans_basetype: + aggr identifier + { aggr1: current_aggr = $$; $$ = $2; } + | aggr template_type_name %prec EMPTY + { current_aggr = $$; $$ = $2; } + | aggr TYPENAME_COLON + { yyungetc (':', 1); goto aggr1; } + | aggr template_type_name '{' + { yyungetc ('{', 1); + aggr2: + current_aggr = $$; + $$ = $2; + overload_template_name ($$, 0); } + | aggr template_type_name ':' + { yyungetc (':', 1); goto aggr2; } + ; + +named_class_head_sans_basetype_defn: + aggr identifier_defn + { current_aggr = $$; $$ = $2; } + ; + +named_class_head: + named_class_head_sans_basetype + { + $<ttype>$ = xref_tag (current_aggr, $1, NULL_TREE, 1); + } + maybe_base_class_list %prec EMPTY + { + if ($3) + $$ = xref_tag (current_aggr, $1, $3, 1); + else + $$ = $<ttype>2; + } + | + named_class_head_sans_basetype_defn + { + $<ttype>$ = xref_defn_tag (current_aggr, $1, NULL_TREE); + } + maybe_base_class_list %prec EMPTY + { + if ($3) + $$ = xref_defn_tag (current_aggr, $1, $3); + else + $$ = $<ttype>2; + } + ; + +unnamed_class_head: aggr '{' + { $$ = xref_tag ($$, make_anon_name (), NULL_TREE, 0); + yyungetc ('{', 1); } + ; + +class_head: unnamed_class_head | named_class_head ; + +maybe_base_class_list: + %prec EMPTY /* empty */ + { $$ = NULL_TREE; } + | ':' %prec EMPTY + { yyungetc(':', 1); $$ = NULL_TREE; } + | ':' base_class_list %prec EMPTY + { $$ = $2; } + ; + +base_class_list: + base_class + | base_class_list ',' base_class + { $$ = chainon ($$, $3); } + ; + +base_class: + base_class.1 + { + tree type; + do_base_class1: + type = IDENTIFIER_TYPE_VALUE ($$); + if (! is_aggr_typedef ($$, 1)) + $$ = NULL_TREE; + else if (current_aggr == signature_type_node + && (! type) && (! IS_SIGNATURE (type))) + { + error ("class name not allowed as base signature"); + $$ = NULL_TREE; + } + else if (current_aggr == signature_type_node) + { + sorry ("signature inheritance, base type `%s' ignored", + IDENTIFIER_POINTER ($$)); + $$ = build_tree_list ((tree)access_public, $$); + } + else if (type && IS_SIGNATURE (type)) + { + error ("signature name not allowed as base class"); + $$ = NULL_TREE; + } + else + $$ = build_tree_list ((tree)access_default, $$); + } + | scoped_base_class + { + goto do_base_class1; + } + | base_class_access_list base_class.1 + { + tree type; + do_base_class2: + type = IDENTIFIER_TYPE_VALUE ($2); + if (current_aggr == signature_type_node) + error ("access and source specifiers not allowed in signature"); + if (! is_aggr_typedef ($2, 1)) + $$ = NULL_TREE; + else if (current_aggr == signature_type_node + && (! type) && (! IS_SIGNATURE (type))) + { + error ("class name not allowed as base signature"); + $$ = NULL_TREE; + } + else if (current_aggr == signature_type_node) + { + sorry ("signature inheritance, base type `%s' ignored", + IDENTIFIER_POINTER ($$)); + $$ = build_tree_list ((tree)access_public, $2); + } + else if (type && IS_SIGNATURE (type)) + { + error ("signature name not allowed as base class"); + $$ = NULL_TREE; + } + else + $$ = build_tree_list ((tree) $$, $2); + } + | base_class_access_list scoped_base_class + { + goto do_base_class2; + } + ; + +scoped_base_class: + base_class.1 SCOPED_TYPENAME + { + /* Kludge!!! See rule "template_type" and the code + * dealing with "template_type_seen_before_scope" in + * yylex(). */ + $$ = $2; + } + ; +base_class.1: + template_type_name tmpl.2 template_instantiation + { + extern tree template_type_seen_before_scope; + tree id = $3 ? TYPE_IDENTIFIER ($3) : $1; + + /* Check the rule template_type to get this... */ + if (yychar == YYEMPTY) + yychar = YYLEX; + if (yychar == SCOPE) { + template_type_seen_before_scope = id; + yychar = YYLEX; + } + } + | identifier + | SIGOF '(' expr ')' + { + if (current_aggr == signature_type_node) + { + if (IS_AGGR_TYPE (TREE_TYPE ($3))) + { + sorry ("`sigof' as base signature specifier"); + /* need to return some dummy signature identifier */ + $$ = $3; + } + else + { + error ("`sigof' applied to non-aggregate expression"); + $$ = error_mark_node; + } + } + else + { + error ("`sigof' in struct or class declaration"); + $$ = error_mark_node; + } + } + | SIGOF '(' typename ')' + { + if (current_aggr == signature_type_node) + { + if (IS_AGGR_TYPE (groktypename ($3))) + { + sorry ("`sigof' as base signature specifier"); + /* need to return some dummy signature identifier */ + $$ = $3; + } + else + { + error ("`sigof' applied to non-aggregate expression"); + $$ = error_mark_node; + } + } + else + { + error ("`sigof' in struct or class declaration"); + $$ = error_mark_node; + } + } + ; + +base_class_access_list: + VISSPEC + | SCSPEC + { if ($<ttype>$ != ridpointers[(int)RID_VIRTUAL]) + sorry ("non-virtual access"); + $$ = access_default_virtual; } + | base_class_access_list VISSPEC + { int err = 0; + if ($2 == access_protected) + { + warning ("`protected' access not implemented"); + $2 = access_public; + err++; + } + else if ($2 == access_public) + { + if ($1 == access_private) + { + mixed: + error ("base class cannot be public and private"); + } + else if ($1 == access_default_virtual) + $$ = access_public_virtual; + } + else /* $2 == access_private */ + { + if ($1 == access_public) + goto mixed; + else if ($1 == access_default_virtual) + $$ = access_private_virtual; + } + } + | base_class_access_list SCSPEC + { if ($2 != ridpointers[(int)RID_VIRTUAL]) + sorry ("non-virtual access"); + if ($$ == access_public) + $$ = access_public_virtual; + else if ($$ == access_private) + $$ = access_private_virtual; } + ; + +left_curly: '{' + { tree t; + push_obstacks_nochange (); + end_temporary_allocation (); + + if (! IS_AGGR_TYPE ($<ttype>0)) + { + $<ttype>0 = make_lang_type (RECORD_TYPE); + TYPE_NAME ($<ttype>0) = get_identifier ("erroneous type"); + } + if (TYPE_SIZE ($<ttype>0)) + duplicate_tag_error ($<ttype>0); + if (TYPE_SIZE ($<ttype>0) || TYPE_BEING_DEFINED ($<ttype>0)) + { + t = make_lang_type (TREE_CODE ($<ttype>0)); + pushtag (TYPE_IDENTIFIER ($<ttype>0), t, 0); + $<ttype>0 = t; + } + pushclass ($<ttype>0, 0); + TYPE_BEING_DEFINED ($<ttype>0) = 1; + t = TYPE_IDENTIFIER ($<ttype>0); + if (t && IDENTIFIER_TEMPLATE (t)) + overload_template_name (t, 1); + } + ; + +opt.component_decl_list: + /* empty */ + { $$ = NULL_TREE; } + | component_decl_list + { + if (current_aggr == signature_type_node) + $$ = build_tree_list ((tree) access_public, $$); + else + $$ = build_tree_list ((tree) access_default, $$); + } + | opt.component_decl_list VISSPEC ':' component_decl_list + { + tree visspec = (tree) $2; + + if (current_aggr == signature_type_node) + { + error ("access specifier not allowed in signature"); + visspec = (tree) access_public; + } + $$ = chainon ($$, build_tree_list (visspec, $4)); + } + | opt.component_decl_list VISSPEC ':' + { + if (current_aggr == signature_type_node) + error ("access specifier not allowed in signature"); + } + ; + +/* Note: we no longer warn about the semicolon after a component_decl_list. + ARM $9.2 says that the semicolon is optional, and therefore allowed. */ +component_decl_list: + component_decl + { if ($$ == void_type_node) $$ = NULL_TREE; + } + | component_decl_list component_decl + { /* In pushdecl, we created a reverse list of names + in this binding level. Make sure that the chain + of what we're trying to add isn't the item itself + (which can happen with what pushdecl's doing). */ + if ($2 != NULL_TREE && $2 != void_type_node) + { + if (TREE_CHAIN ($2) != $$) + $$ = chainon ($$, $2); + else + $$ = $2; + } + } + | component_decl_list ';' + ; + +component_decl: + typed_declspecs components ';' + { + $$ = grok_x_components ($$, $2); + end_exception_decls (); + } + | typed_declspecs '(' parmlist ')' ';' + { $$ = groktypefield ($$, $3); } + | typed_declspecs '(' parmlist ')' '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = groktypefield ($$, $3); } + | typed_declspecs LEFT_RIGHT ';' + { $$ = groktypefield ($$, empty_parms ()); } + | typed_declspecs LEFT_RIGHT '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = groktypefield ($$, empty_parms ()); } + | declmods components ';' + { + $$ = grok_x_components ($$, $2); + end_exception_decls (); + } + /* Normal case: make this fast. */ + | declmods declarator ';' + { $$ = grokfield ($<ttype>2, $<ttype>$, + NULL_TREE, NULL_TREE, NULL_TREE); } + | declmods components '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = grok_x_components ($$, $2); + end_exception_decls (); + } + | declmods '(' parmlist ')' ';' + { $$ = groktypefield ($$, $3); } + | declmods '(' parmlist ')' '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = groktypefield ($$, $3); } + | declmods LEFT_RIGHT ';' + { $$ = groktypefield ($$, empty_parms ()); } + | declmods LEFT_RIGHT '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = groktypefield ($$, empty_parms ()); } + | ':' expr_no_commas ';' + { $$ = grokbitfield (NULL_TREE, NULL_TREE, $2); } + | ':' expr_no_commas '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = grokbitfield (NULL_TREE, NULL_TREE, $2); } + | error + { $$ = NULL_TREE; } + + /* C++: handle constructors, destructors and inline functions */ + /* note that INLINE is like a TYPESPEC */ + | fn.def2 ':' /* base_init compstmt */ + { $$ = finish_method ($$); } + | fn.def2 '{' /* nodecls compstmt */ + { $$ = finish_method ($$); } + | notype_declarator maybe_raises ';' + { $$ = grokfield ($$, NULL_TREE, $2, NULL_TREE, NULL_TREE); } + | notype_declarator maybe_raises '}' + { error ("missing ';' before right brace"); + yyungetc ('}', 0); + $$ = grokfield ($$, NULL_TREE, $2, NULL_TREE, NULL_TREE); } + ; + +components: + /* empty: possibly anonymous */ + { $$ = NULL_TREE; } + | component_declarator0 + | components ',' component_declarator + { + /* In this context, void_type_node encodes + friends. They have been recorded elsewhere. */ + if ($$ == void_type_node) + $$ = $3; + else + $$ = chainon ($$, $3); + } + ; + +component_declarator0: + declarator maybe_raises maybeasm maybe_attribute + { current_declspecs = $<ttype>0; + $$ = grokfield ($$, current_declspecs, $2, NULL_TREE, $3); + cplus_decl_attributes ($$, $4); } + | declarator maybe_raises maybeasm maybe_attribute '=' init + { current_declspecs = $<ttype>0; + $$ = grokfield ($$, current_declspecs, $2, $6, $3); + cplus_decl_attributes ($$, $4); } + | IDENTIFIER ':' expr_no_commas maybe_attribute + { current_declspecs = $<ttype>0; + $$ = grokbitfield ($$, current_declspecs, $3); + cplus_decl_attributes ($$, $4); } + | TYPENAME ':' expr_no_commas maybe_attribute + { current_declspecs = $<ttype>0; + $$ = grokbitfield ($$, current_declspecs, $3); + cplus_decl_attributes ($$, $4); } + | ':' expr_no_commas maybe_attribute + { current_declspecs = $<ttype>0; + $$ = grokbitfield (NULL_TREE, NULL_TREE, $2); + cplus_decl_attributes ($$, $3); } + ; + +component_declarator: + declarator maybe_raises maybeasm maybe_attribute + { $$ = grokfield ($$, current_declspecs, $2, NULL_TREE, $3); + cplus_decl_attributes ($$, $4); } + | declarator maybe_raises maybeasm maybe_attribute '=' init + { $$ = grokfield ($$, current_declspecs, $2, $6, $3); + cplus_decl_attributes ($$, $4); } + | IDENTIFIER ':' expr_no_commas maybe_attribute + { $$ = grokbitfield ($$, current_declspecs, $3); + cplus_decl_attributes ($$, $4); } + | TYPENAME ':' expr_no_commas maybe_attribute + { $$ = grokbitfield ($$, current_declspecs, $3); + cplus_decl_attributes ($$, $4); } + | ':' expr_no_commas maybe_attribute + { $$ = grokbitfield (NULL_TREE, NULL_TREE, $2); + cplus_decl_attributes ($$, $3); } + ; + +/* We chain the enumerators in reverse order. + Because of the way enums are built, the order is + insignificant. Take advantage of this fact. */ + +enumlist: + enumerator + | enumlist ',' enumerator + { TREE_CHAIN ($3) = $$; $$ = $3; } + ; + +enumerator: + identifier + { $$ = build_enumerator ($$, NULL_TREE); } + | identifier '=' expr_no_commas + { $$ = build_enumerator ($$, $3); } + ; + +/* ANSI type-id (8.1) */ +typename: + typed_typespecs absdcl + { $$ = build_decl_list ($$, $2); } + | nonempty_type_quals absdcl + { $$ = build_decl_list ($$, $2); } + ; + +/* ANSI abstract-declarator (8.1) */ +absdcl: /* an abstract declarator */ + /* empty */ %prec EMPTY + { $$ = NULL_TREE; } + | absdcl1 %prec EMPTY + | START_DECLARATOR absdcl1 %prec EMPTY + { $$ = $2; } + ; + +nonempty_type_quals: + TYPE_QUAL + { $$ = IDENTIFIER_AS_LIST ($$); } + | nonempty_type_quals TYPE_QUAL + { $$ = decl_tree_cons (NULL_TREE, $2, $$); } + ; + +type_quals: + /* empty */ + { $$ = NULL_TREE; } + | type_quals TYPE_QUAL + { $$ = decl_tree_cons (NULL_TREE, $2, $$); } + ; + +/* These rules must follow the rules for function declarations + and component declarations. That way, longer rules are preferred. */ + +/* An expression which will not live on the momentary obstack. */ +nonmomentary_expr: + { $<itype>$ = suspend_momentary (); } expr + { resume_momentary ((int) $<itype>1); $$ = $2; } + +/* A declarator that is allowed only after an explicit typespec. */ +/* may all be followed by prec '.' */ +after_type_declarator: + after_type_declarator '(' nonnull_exprlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | after_type_declarator '(' parmlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | after_type_declarator LEFT_RIGHT type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, empty_parms (), $3); } + | after_type_declarator '(' error ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, NULL_TREE, NULL_TREE); } + | after_type_declarator '[' nonmomentary_expr ']' + { $$ = build_parse_node (ARRAY_REF, $$, $3); } + | after_type_declarator '[' ']' + { $$ = build_parse_node (ARRAY_REF, $$, NULL_TREE); } + | '(' after_type_declarator_no_typename ')' + { $$ = $2; } + | '(' '*' type_quals after_type_declarator ')' + { $$ = make_pointer_declarator ($3, $4); } + | PAREN_STAR_PAREN + { see_typename (); } + | after_type_member_declarator + | '(' '&' type_quals after_type_declarator ')' + { $$ = make_reference_declarator ($3, $4); } + | '*' type_quals after_type_declarator %prec UNARY + { $$ = make_pointer_declarator ($2, $3); } + | '&' type_quals after_type_declarator %prec UNARY + { $$ = make_reference_declarator ($2, $3); } + | TYPENAME %prec EMPTY + ; + +after_type_declarator_no_typename: + after_type_declarator_no_typename '(' nonnull_exprlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | after_type_declarator_no_typename '(' parmlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | after_type_declarator_no_typename LEFT_RIGHT type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, empty_parms (), $3); } + | after_type_declarator_no_typename '(' error ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, NULL_TREE, NULL_TREE); } + | after_type_declarator_no_typename '[' nonmomentary_expr ']' + { $$ = build_parse_node (ARRAY_REF, $$, $3); } + | after_type_declarator_no_typename '[' ']' + { $$ = build_parse_node (ARRAY_REF, $$, NULL_TREE); } + | '(' after_type_declarator_no_typename ')' + { $$ = $2; } + | PAREN_STAR_PAREN + { see_typename (); } + | after_type_member_declarator + | '*' type_quals after_type_declarator %prec UNARY + { $$ = make_pointer_declarator ($2, $3); } + | '&' type_quals after_type_declarator %prec UNARY + { $$ = make_reference_declarator ($2, $3); } + ; + +/* A declarator allowed whether or not there has been + an explicit typespec. These cannot redeclare a typedef-name. */ + +notype_declarator: + notype_declarator '(' nonnull_exprlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | notype_declarator '(' parmlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | notype_declarator LEFT_RIGHT type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, empty_parms (), $3); } + | notype_declarator '(' error ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, NULL_TREE, NULL_TREE); } + | '(' notype_declarator ')' + { $$ = $2; } + | '*' type_quals notype_declarator %prec UNARY + { $$ = make_pointer_declarator ($2, $3); } + | '&' type_quals notype_declarator %prec UNARY + { $$ = make_reference_declarator ($2, $3); } + | notype_declarator '[' nonmomentary_expr ']' + { $$ = build_parse_node (ARRAY_REF, $$, $3); } + | notype_declarator '[' ']' + { $$ = build_parse_node (ARRAY_REF, $$, NULL_TREE); } + | IDENTIFIER + { see_typename (); } + + /* C++ extensions. */ + | operator_name + { see_typename (); } + + | '~' TYPENAME + { + destructor_name: + see_typename (); + $$ = build_parse_node (BIT_NOT_EXPR, $2); + } + | '~' IDENTIFIER + { goto destructor_name; } + | '~' PTYPENAME + { goto destructor_name; } + | id_scope see_typename notype_declarator %prec '(' + { see_typename (); + if (TREE_CODE ($$) != SCOPE_REF) + $$ = build_push_scope ($$, $3); + else if (TREE_OPERAND ($$, 1) == NULL_TREE) + TREE_OPERAND ($$, 1) = $3; + else + $$ = build_parse_node (SCOPE_REF, $$, $3); + } + | id_scope see_typename TYPENAME %prec '(' + { $$ = build_push_scope ($$, $3); } + | id_scope see_typename TYPENAME '(' nonnull_exprlist ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, $5, $7)); } + | id_scope see_typename TYPENAME '(' parmlist ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, $5, $7)); } + | id_scope see_typename TYPENAME LEFT_RIGHT type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, empty_parms (), $5)); } + | id_scope see_typename TYPENAME '(' error ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, NULL_TREE, NULL_TREE)); } + /* For constructor templates. */ + | id_scope see_typename PTYPENAME %prec '(' + { $$ = build_push_scope ($$, $3); } + | id_scope see_typename PTYPENAME '(' nonnull_exprlist ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, $5, $7)); } + | id_scope see_typename PTYPENAME '(' parmlist ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, $5, $7)); } + | id_scope see_typename PTYPENAME LEFT_RIGHT type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, empty_parms (), $5)); } + | id_scope see_typename PTYPENAME '(' error ')' type_quals %prec '.' + { $$ = build_push_scope ($$, build_parse_node (CALL_EXPR, $3, NULL_TREE, NULL_TREE)); } + | SCOPE see_typename notype_declarator + { $$ = build_parse_node (SCOPE_REF, NULL_TREE, $3); } + | template_type SCOPED_NAME + { $$ = $2; } + ; + +id_scope: typename_scope + { tree t; + do_id_scope: + + t = resolve_scope_to_name (NULL_TREE, $$); + if (t == NULL_TREE) + { + cp_error ("`%T' is not a valid scope", $$); + $$ = error_mark_node; + } + else + $$ = t; + } + | IDENTIFIER SCOPE + { goto do_id_scope; } + | template_type SCOPE /* try_for_typename %prec EMPTY */ + { + if ($$ == error_mark_node) + /* leave it alone */; + else + { + $$ = resolve_scope_to_name (NULL_TREE, TYPE_IDENTIFIER ($$)); + if ($$ == NULL_TREE) + { + error ("undefined explicitly scoped type"); + $$ = error_mark_node; + } + } +/* if ($3) popclass (1); */ + } + ; + +typename_scope: + TYPENAME SCOPE; + +scoped_typename: SCOPED_TYPENAME + | template_type SCOPED_TYPENAME + { + /* Kludge!!! See rule "template_type" and the code + * dealing with "template_type_seen_before_scope" in + * yylex(). */ + $$ = $2; + } +/* | template_type SCOPE try_for_typename TYPENAME + { + if ($$ == error_mark_node) + ; + else + { + $$ = build_parse_node (SCOPE_REF, + TYPE_IDENTIFIER ($$), + $4); + } + if ($3) popclass (1); + } */ + ; + +absdcl1: /* a nonempty abstract declarator */ + '(' absdcl1 ')' + { see_typename (); + $$ = $2; } + /* `(typedef)1' is `int'. */ + | '*' type_quals absdcl1 %prec EMPTY + { $$ = make_pointer_declarator ($2, $3); } + | '*' type_quals %prec EMPTY + { $$ = make_pointer_declarator ($2, NULL_TREE); } +/* + | id_scope '*' type_quals absdcl1 %prec EMPTY + { $3 = make_pointer_declarator ($3, $4); + $$ = build_parse_node (SCOPE_REF, $$, $3); } + | id_scope '*' type_quals %prec EMPTY + { $3 = make_pointer_declarator ($3, NULL_TREE); + $$ = build_parse_node (SCOPE_REF, $$, $3); } +*/ + | PAREN_STAR_PAREN + { see_typename (); } + | '(' abs_member_declarator ')' + { $$ = $2; } + | '&' type_quals absdcl1 %prec EMPTY + { $$ = make_reference_declarator ($2, $3); } + | '&' type_quals %prec EMPTY + { $$ = make_reference_declarator ($2, NULL_TREE); } + | absdcl1 '(' parmlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, $3, $5); } + | absdcl1 LEFT_RIGHT type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, $$, empty_parms (), $3); } + | absdcl1 '[' nonmomentary_expr ']' %prec '.' + { $$ = build_parse_node (ARRAY_REF, $$, $3); } + | absdcl1 '[' ']' %prec '.' + { $$ = build_parse_node (ARRAY_REF, $$, NULL_TREE); } + | '(' parmlist ')' type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, NULL_TREE, $2, $4); } + | LEFT_RIGHT type_quals %prec '.' + { $$ = build_parse_node (CALL_EXPR, NULL_TREE, empty_parms (), $2); } + | '[' nonmomentary_expr ']' %prec '.' + { $$ = build_parse_node (ARRAY_REF, NULL_TREE, $2); } + | '[' ']' %prec '.' + { $$ = build_parse_node (ARRAY_REF, NULL_TREE, NULL_TREE); } + ; + +abs_member_declarator: + id_scope see_typename '*' type_quals + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (INDIRECT_REF, 0); + } + | id_scope see_typename '*' type_quals absdcl1 + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (INDIRECT_REF, $5); + } + | id_scope see_typename '&' type_quals + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (ADDR_EXPR, 0); + } + | id_scope see_typename '&' type_quals absdcl1 + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (ADDR_EXPR, $5); + } + ; + +after_type_member_declarator: + id_scope see_typename '*' type_quals after_type_declarator + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (INDIRECT_REF, $5); + } + | id_scope see_typename '&' type_quals after_type_declarator + { tree t; + t = $$; + while (TREE_OPERAND (t, 1)) + t = TREE_OPERAND (t, 1); + TREE_OPERAND (t, 1) = build_parse_node (ADDR_EXPR, $5); + } + ; + +/* For C++, decls and stmts can be intermixed, so we don't need to + have a special rule that won't start parsing the stmt section + until we have a stmt that parses without errors. */ + +stmts: + stmt + | errstmt + | stmts stmt + | stmts errstmt + ; + +errstmt: error ';' + ; + +/* build the LET_STMT node before parsing its contents, + so that any LET_STMTs within the context can have their display pointers + set up to point at this one. */ + +.pushlevel: /* empty */ + { emit_line_note (input_filename, lineno); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); } + ; + +/* Read zero or more forward-declarations for labels + that nested functions can jump to. */ +maybe_label_decls: + /* empty */ + | label_decls + { if (pedantic) + pedwarn ("ANSI C++ forbids label declarations"); } + ; + +label_decls: + label_decl + | label_decls label_decl + ; + +label_decl: + LABEL identifiers_or_typenames ';' + { tree link; + for (link = $2; link; link = TREE_CHAIN (link)) + { + tree label = shadow_label (TREE_VALUE (link)); + C_DECLARED_LABEL_FLAG (label) = 1; + declare_nonlocal_label (label); + } + } + ; + +/* This is the body of a function definition. + It causes syntax errors to ignore to the next openbrace. */ +compstmt_or_error: + compstmt + {} + | error compstmt + ; + +compstmt: '{' .pushlevel '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p(), 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); } + | '{' .pushlevel maybe_label_decls stmts '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p(), 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); } + | '{' .pushlevel maybe_label_decls error '}' + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p(), 1); + $$ = poplevel (kept_level_p (), 0, 0); + pop_momentary (); } + ; + +simple_if: + IF + { cond_stmt_keyword = "if"; } + .pushlevel paren_cond_or_null + { emit_line_note (input_filename, lineno); + expand_start_cond (truthvalue_conversion ($4), 0); } + partially_scoped_stmt + ; + +implicitly_scoped_stmt: + compstmt + { finish_stmt (); } + | .pushlevel simple_stmt + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), getdecls() != NULL_TREE, 1); + $$ = poplevel (kept_level_p (), 1, 0); + pop_momentary (); } + ; + +stmt: + compstmt + { finish_stmt (); } + | simple_stmt + ; + +simple_stmt: + decl + { finish_stmt (); } + | expr ';' + { + tree expr = $1; + emit_line_note (input_filename, lineno); + /* Do default conversion if safe and possibly important, + in case within ({...}). */ + if ((TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE + && lvalue_p (expr)) + || TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE) + expr = default_conversion (expr); + cplus_expand_expr_stmt (expr); + clear_momentary (); + finish_stmt (); } + | simple_if ELSE + { expand_start_else (); } + partially_scoped_stmt + { expand_end_cond (); + pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + finish_stmt (); } + | simple_if %prec IF + { expand_end_cond (); + pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + finish_stmt (); } + | WHILE + { emit_nop (); + emit_line_note (input_filename, lineno); + expand_start_loop (1); + cond_stmt_keyword = "while"; } + .pushlevel paren_cond_or_null + { expand_exit_loop_if_false (0, truthvalue_conversion ($4)); } + already_scoped_stmt + { pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + expand_end_loop (); + finish_stmt (); } + | DO + { emit_nop (); + emit_line_note (input_filename, lineno); + expand_start_loop_continue_elsewhere (1); } + implicitly_scoped_stmt WHILE + { expand_loop_continue_here (); + cond_stmt_keyword = "do"; } + paren_expr_or_null ';' + { emit_line_note (input_filename, lineno); + expand_exit_loop_if_false (0, truthvalue_conversion ($6)); + expand_end_loop (); + clear_momentary (); + finish_stmt (); } + | forhead.1 + { emit_nop (); + emit_line_note (input_filename, lineno); + if ($1) cplus_expand_expr_stmt ($1); + expand_start_loop_continue_elsewhere (1); } + .pushlevel xcond ';' + { emit_line_note (input_filename, lineno); + if ($4) expand_exit_loop_if_false (0, truthvalue_conversion ($4)); } + xexpr ')' + /* Don't let the tree nodes for $7 be discarded + by clear_momentary during the parsing of the next stmt. */ + { push_momentary (); } + already_scoped_stmt + { emit_line_note (input_filename, lineno); + pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + expand_loop_continue_here (); + if ($7) cplus_expand_expr_stmt ($7); + pop_momentary (); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + expand_end_loop (); + finish_stmt (); } + | forhead.2 + { emit_nop (); + emit_line_note (input_filename, lineno); + expand_start_loop_continue_elsewhere (1); } + .pushlevel xcond ';' + { emit_line_note (input_filename, lineno); + if ($4) expand_exit_loop_if_false (0, truthvalue_conversion ($4)); } + xexpr ')' + /* Don't let the tree nodes for $7 be discarded + by clear_momentary during the parsing of the next stmt. */ + { push_momentary (); + $<itype>8 = lineno; } + already_scoped_stmt + { emit_line_note (input_filename, (int) $<itype>8); + pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + expand_loop_continue_here (); + if ($7) cplus_expand_expr_stmt ($7); + pop_momentary (); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + expand_end_loop (); + finish_stmt (); + } + | SWITCH .pushlevel '(' condition ')' + { emit_line_note (input_filename, lineno); + c_expand_start_case ($4); + /* Don't let the tree nodes for $4 be discarded by + clear_momentary during the parsing of the next stmt. */ + push_momentary (); } + partially_scoped_stmt + { expand_end_case ($4); + pop_momentary (); + pop_implicit_try_blocks (NULL_TREE); + expand_end_bindings (getdecls (), kept_level_p (), 1); + poplevel (kept_level_p (), 1, 0); + pop_momentary (); + finish_stmt (); } + | CASE expr_no_commas ':' + { register tree value = $2; + register tree label + = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value) == NOP_EXPR + && TREE_TYPE (value) == TREE_TYPE (TREE_OPERAND (value, 0))) + value = TREE_OPERAND (value, 0); + + if (TREE_READONLY_DECL_P (value)) + { + value = decl_constant_value (value); + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value) == NOP_EXPR + && TREE_TYPE (value) == TREE_TYPE (TREE_OPERAND (value, 0))) + value = TREE_OPERAND (value, 0); + } + value = fold (value); + + if (TREE_CODE (value) != INTEGER_CST + && value != error_mark_node) + { + cp_error ("case label `%E' does not reduce to an integer constant", $2); + value = error_mark_node; + } + else + /* Promote char or short to int. */ + value = default_conversion (value); + if (value != error_mark_node) + { + tree duplicate; + int success = pushcase (value, convert_and_check, + label, &duplicate); + if (success == 1) + cp_error ("case label `%E' not within a switch statement", $2); + else if (success == 2) + { + cp_error ("duplicate case value `%E'", $2); + cp_error_at ("`%E' previously used here", duplicate); + } + else if (success == 3) + warning ("case value out of range"); + else if (success == 5) + cp_error ("case label `%E' within scope of cleanup or variable array", $2); + } + define_case_label (label); + } + stmt + | CASE expr_no_commas RANGE expr_no_commas ':' + { register tree value1 = $2; + register tree value2 = $4; + register tree label + = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + + if (pedantic) + pedwarn ("ANSI C++ forbids range expressions in switch statement"); + + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value1) == NOP_EXPR + && TREE_TYPE (value1) == TREE_TYPE (TREE_OPERAND (value1, 0))) + value1 = TREE_OPERAND (value1, 0); + + if (TREE_READONLY_DECL_P (value1)) + { + value1 = decl_constant_value (value1); + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value1) == NOP_EXPR + && TREE_TYPE (value1) == TREE_TYPE (TREE_OPERAND (value1, 0))) + value1 = TREE_OPERAND (value1, 0); + } + value1 = fold (value1); + + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value2) == NOP_EXPR + && TREE_TYPE (value2) == TREE_TYPE (TREE_OPERAND (value2, 0))) + value2 = TREE_OPERAND (value2, 0); + + if (TREE_READONLY_DECL_P (value2)) + { + value2 = decl_constant_value (value2); + /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. + Strip such NOP_EXPRs. */ + if (TREE_CODE (value2) == NOP_EXPR + && TREE_TYPE (value2) == TREE_TYPE (TREE_OPERAND (value2, 0))) + value2 = TREE_OPERAND (value2, 0); + } + value2 = fold (value2); + + + if (TREE_CODE (value1) != INTEGER_CST + && value1 != error_mark_node) + { + error ("case label does not reduce to an integer constant"); + value1 = error_mark_node; + } + if (TREE_CODE (value2) != INTEGER_CST + && value2 != error_mark_node) + { + error ("case label does not reduce to an integer constant"); + value2 = error_mark_node; + } + if (value1 != error_mark_node + && value2 != error_mark_node) + { + tree duplicate; + int success = pushcase_range (value1, value2, + convert_and_check, label, + &duplicate); + if (success == 1) + error ("case label not within a switch statement"); + else if (success == 2) + { + error ("duplicate (or overlapping) case value"); + error_with_decl (duplicate, "this is the first entry overlapping that value"); + } + else if (success == 3) + warning ("case value out of range"); + else if (success == 4) + warning ("empty range specified"); + else if (success == 5) + error ("case label within scope of cleanup or variable array"); + } + define_case_label (label); + } + stmt + | DEFAULT ':' + { + tree duplicate; + register tree label + = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); + int success = pushcase (NULL_TREE, 0, label, &duplicate); + if (success == 1) + error ("default label not within a switch statement"); + else if (success == 2) + { + error ("multiple default labels in one switch"); + error_with_decl (duplicate, "this is the first default label"); + } + define_case_label (NULL_TREE); + } + stmt + | BREAK ';' + { emit_line_note (input_filename, lineno); + if ( ! expand_exit_something ()) + error ("break statement not within loop or switch"); } + | CONTINUE ';' + { emit_line_note (input_filename, lineno); + if (! expand_continue_loop (0)) + error ("continue statement not within a loop"); } + | RETURN ';' + { emit_line_note (input_filename, lineno); + c_expand_return (NULL_TREE); } + | RETURN expr ';' + { emit_line_note (input_filename, lineno); + c_expand_return ($2); + finish_stmt (); + } + | asm_keyword maybe_type_qual '(' string ')' ';' + { if (TREE_CHAIN ($4)) $4 = combine_strings ($4); + emit_line_note (input_filename, lineno); + expand_asm ($4); + finish_stmt (); + } + /* This is the case with just output operands. */ + | asm_keyword maybe_type_qual '(' string ':' asm_operands ')' ';' + { if (TREE_CHAIN ($4)) $4 = combine_strings ($4); + emit_line_note (input_filename, lineno); + c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE, + $2 == ridpointers[(int)RID_VOLATILE], + input_filename, lineno); + finish_stmt (); + } + /* This is the case with input operands as well. */ + | asm_keyword maybe_type_qual '(' string ':' asm_operands ':' asm_operands ')' ';' + { if (TREE_CHAIN ($4)) $4 = combine_strings ($4); + emit_line_note (input_filename, lineno); + c_expand_asm_operands ($4, $6, $8, NULL_TREE, + $2 == ridpointers[(int)RID_VOLATILE], + input_filename, lineno); + finish_stmt (); + } + /* This is the case with clobbered registers as well. */ + | asm_keyword maybe_type_qual '(' string ':' asm_operands ':' + asm_operands ':' asm_clobbers ')' ';' + { if (TREE_CHAIN ($4)) $4 = combine_strings ($4); + emit_line_note (input_filename, lineno); + c_expand_asm_operands ($4, $6, $8, $10, + $2 == ridpointers[(int)RID_VOLATILE], + input_filename, lineno); + finish_stmt (); + } + | GOTO '*' expr ';' + { emit_line_note (input_filename, lineno); + expand_computed_goto ($3); } + | GOTO identifier ';' + { tree decl; + emit_line_note (input_filename, lineno); + decl = lookup_label ($2); + TREE_USED (decl) = 1; + expand_goto (decl); } + | label_colon stmt + { finish_stmt (); } + | label_colon '}' + { error ("label must be followed by statement"); + yyungetc ('}', 0); + finish_stmt (); } + | ';' + { finish_stmt (); } + + /* Exception handling extensions. */ + | ANSI_THROW ';' { cplus_expand_throw (NULL_TREE); } + | ANSI_THROW expr ';' { cplus_expand_throw ($2); } + | THROW raise_identifier '(' nonnull_exprlist ')' ';' + { cplus_expand_raise ($2, $4, NULL_TREE, 0); + finish_stmt (); } + | THROW raise_identifier LEFT_RIGHT ';' + { cplus_expand_raise ($2, NULL_TREE, NULL_TREE, 0); + finish_stmt (); } + | RAISE raise_identifier '(' nonnull_exprlist ')' ';' + { cplus_expand_raise ($2, $4, NULL_TREE, 0); + finish_stmt (); } + | RAISE raise_identifier LEFT_RIGHT ';' + { cplus_expand_raise ($2, NULL_TREE, NULL_TREE, 0); + finish_stmt (); } + | RAISE identifier ';' + { cplus_expand_reraise ($2); + finish_stmt (); } + | try EXCEPT identifier '{' + { + tree decl = cplus_expand_end_try ($1); + $<ttype>2 = current_exception_type; + $<ttype>4 = current_exception_decl; + $<ttype>$ = current_exception_object; + cplus_expand_start_except ($3, decl); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + } + except_stmts '}' + { + tree decls = getdecls (); + /* If there is a default exception to handle, + handle it here. */ + if ($6) + { + tree decl = build_decl (CPLUS_CATCH_DECL, NULL_TREE, 0); + tree block; + + pushlevel (1); + expand_start_bindings (0); + expand_expr ($6, 0, 0, 0); + expand_end_bindings (0, 1, 0); + block = poplevel (1, 0, 0); + + /* This is a catch block. */ + TREE_LANG_FLAG_2 (block) = 1; + BLOCK_VARS (block) = decl; + } + + expand_end_bindings (decls, decls != 0, 1); + poplevel (decls != 0, 1, 0); + pop_momentary (); + current_exception_type = $<ttype>2; + current_exception_decl = $<ttype>4; + current_exception_object = $<ttype>5; + cplus_expand_end_except ($6); + } + | try error + { + cplus_expand_end_try ($1); + /* These are the important actions of + `cplus_expand_end_except' which we must emulate. */ + if (expand_escape_except ()) + expand_end_except (); + expand_end_bindings (0, 0, 1); + poplevel (0, 0, 0); + } + | ansi_try ansi_dummy ansi_dummy + { + tree decl = cplus_expand_end_try ($1); + $<ttype>2 = current_exception_type; + $<ttype>3 = current_exception_decl; + $<ttype>$ = current_exception_object; + cplus_expand_start_except (NULL, decl); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + } + ansi_except_stmts + { + tree decls = getdecls (); + /* If there is a default exception to handle, + handle it here. */ + if ($5) + { + tree decl = build_decl (CPLUS_CATCH_DECL, NULL_TREE, 0); + tree block; + + pushlevel (1); + expand_start_bindings (0); + expand_expr ($5, 0, 0, 0); + expand_end_bindings (0, 1, 0); + block = poplevel (1, 0, 0); + + /* This is a catch block. */ + TREE_LANG_FLAG_2 (block) = 1; + BLOCK_VARS (block) = decl; + } + + expand_end_bindings (decls, decls != 0, 1); + poplevel (decls != 0, 1, 0); + pop_momentary (); + current_exception_type = $<ttype>2; + current_exception_decl = $<ttype>3; + current_exception_object = $<ttype>4; + cplus_expand_end_except ($5); + } + | try RERAISE raise_identifiers /* ';' checked for at bottom. */ + { tree name = get_identifier ("(compiler error)"); + tree orig_ex_type = current_exception_type; + tree orig_ex_decl = current_exception_decl; + tree orig_ex_obj = current_exception_object; + tree decl = cplus_expand_end_try ($1), decls; + + /* Start hidden EXCEPT. */ + cplus_expand_start_except (name, decl); + pushlevel (0); + clear_last_expr (); + push_momentary (); + expand_start_bindings (0); + + /* This sets up the reraise. */ + cplus_expand_reraise ($3); + + decls = getdecls (); + expand_end_bindings (decls, decls != 0, 1); + poplevel (decls != 0, 1, 0); + pop_momentary (); + current_exception_type = orig_ex_type; + current_exception_decl = orig_ex_decl; + current_exception_object = orig_ex_obj; + /* This will reraise for us. */ + cplus_expand_end_except (error_mark_node); + if (yychar == YYEMPTY) + yychar = YYLEX; + if (yychar != ';') + error ("missing ';' after reraise statement"); + } + | try %prec EMPTY + { yyerror ("`except' missing after `try' statement"); + /* Terminate the binding contour started by special + code in `.pushlevel'. Automagically pops off + the conditional we started for `try' stmt. */ + cplus_expand_end_try ($1); + expand_end_bindings (0, 0, 1); + poplevel (0, 0, 0); + pop_momentary (); + YYERROR; } + ; + +try: try_head '}' + /* An empty try block is degenerate, but it's better to + do extra work here than to do all the special-case work + everywhere else. */ + { + $$ = 1; + pop_implicit_try_blocks (NULL_TREE); + } + | try_head stmts '}' + { + $$ = 1; + pop_implicit_try_blocks (NULL_TREE); + } + | try_head error '}' + { + $$ = 0; + pop_implicit_try_blocks (NULL_TREE); + } + ; + +label_colon: + IDENTIFIER ':' + { tree label; + do_label: + label = define_label (input_filename, lineno, $1); + if (label) + expand_label (label); + } + | PTYPENAME ':' + { goto do_label; } + | TYPENAME_COLON + { tree label = define_label (input_filename, lineno, $1); + if (label) + expand_label (label); + } + ; + +try_head: TRY '{' { cplus_expand_start_try (0); } .pushlevel + +ansi_try: ansi_try_head '}' + /* An empty try block is degenerate, but it's better to + do extra work here than to do all the special-case work + everywhere else. */ + { + $$ = 1; + pop_implicit_try_blocks (NULL_TREE); + } + | ansi_try_head stmts '}' + { + $$ = 1; + pop_implicit_try_blocks (NULL_TREE); + } + | ansi_try_head error '}' + { + $$ = 0; + pop_implicit_try_blocks (NULL_TREE); + } + ; + +ansi_dummy: ; /* Temporary place-holder. */ +ansi_try_head: ANSI_TRY '{' { cplus_expand_start_try (0); } .pushlevel + +except_stmts: + /* empty */ + { $$ = NULL_TREE; } + | except_stmts raise_identifier + { + tree type = lookup_exception_type (current_class_type, current_class_name, $2); + if (type == NULL_TREE) + { + error ("`%s' is not an exception type", + IDENTIFIER_POINTER (TREE_VALUE ($2))); + current_exception_type = NULL_TREE; + TREE_TYPE (current_exception_object) = error_mark_node; + } + else + { + current_exception_type = type; + /* In-place union. */ + TREE_TYPE (current_exception_object) = type; + } + $2 = cplus_expand_start_catch ($2); + pushlevel (1); + expand_start_bindings (0); + } + compstmt + { + expand_end_bindings (0, 1, 0); + $4 = poplevel (1, 0, 0); + + cplus_expand_end_catch (0); + + /* Mark this as a catch block. */ + TREE_LANG_FLAG_2 ($4) = 1; + if ($2 != error_mark_node) + { + tree decl = build_decl (CPLUS_CATCH_DECL, DECL_NAME ($2), 0); + DECL_RTL (decl) = DECL_RTL ($2); + TREE_CHAIN (decl) = BLOCK_VARS ($4); + BLOCK_VARS ($4) = decl; + } + } + | except_stmts DEFAULT + { + if ($1) + error ("duplicate default in exception handler"); + current_exception_type = NULL_TREE; + /* Takes it right out of scope. */ + TREE_TYPE (current_exception_object) = error_mark_node; + + if (! expand_catch_default ()) + compiler_error ("default catch botch"); + + /* The default exception is handled as the + last in the chain of exceptions handled. */ + do_pending_stack_adjust (); + $1 = make_node (RTL_EXPR); + TREE_TYPE ($1) = void_type_node; + start_sequence_for_rtl_expr ($1); + } + compstmt + { + extern struct rtx_def *get_insns (); + do_pending_stack_adjust (); + if (! expand_catch (NULL_TREE)) + compiler_error ("except nesting botch"); + if (! expand_end_catch ()) + compiler_error ("except nesting botch"); + RTL_EXPR_SEQUENCE ($1) = get_insns (); + if ($4) + { + /* Mark this block as the default catch block. */ + TREE_LANG_FLAG_1 ($4) = 1; + TREE_LANG_FLAG_2 ($4) = 1; + } + end_sequence (); + } + ; + +optional_identifier: + /* empty */ + { $$ = NULL_TREE; } + | identifier ; + +ansi_except_stmts: + /* empty */ + { $$ = NULL_TREE; } + | ansi_except_stmts CATCH '(' typename optional_identifier ')' + { + tree type = groktypename ($4); + if (IS_SIGNATURE (type)) + { + error ("exception cannot be of signature type"); + type = error_mark_node; + } + current_exception_type = type; + /* In-place union. */ + if ($5) + { + tree tmp; + tmp = pushdecl (build_decl (VAR_DECL, $5, type)); + current_exception_object = + build1 (INDIRECT_REF, type, tmp); + } + $4 = ansi_expand_start_catch(type); + pushlevel (1); + expand_start_bindings (0); + } + compstmt + { + expand_end_bindings (0, 1, 0); + $8 = poplevel (1, 0, 0); + + cplus_expand_end_catch (0); + + /* Mark this as a catch block. */ + TREE_LANG_FLAG_2 ($8) = 1; + if ($4 != error_mark_node) + { + tree decl = build_decl (CPLUS_CATCH_DECL, DECL_NAME ($4), 0); + DECL_RTL (decl) = DECL_RTL ($4); + TREE_CHAIN (decl) = BLOCK_VARS ($8); + BLOCK_VARS ($8) = decl; + } + } + ; + +forhead.1: + FOR '(' ';' + { $$ = NULL_TREE; } + | FOR '(' expr ';' + { $$ = $3; } + | FOR '(' '{' '}' + { $$ = NULL_TREE; } + ; + +forhead.2: + FOR '(' decl + { $$ = 0; } + | FOR '(' error ';' + { $$ = 0; } + | FOR '(' '{' .pushlevel stmts '}' + { $$ = 1; } + | FOR '(' '{' .pushlevel error '}' + { $$ = -1; } + ; + +/* Either a type-qualifier or nothing. First thing in an `asm' statement. */ + +maybe_type_qual: + /* empty */ + { emit_line_note (input_filename, lineno); + $$ = NULL_TREE; } + | TYPE_QUAL + { emit_line_note (input_filename, lineno); } + ; + +xexpr: + /* empty */ + { $$ = NULL_TREE; } + | expr + | error + { $$ = NULL_TREE; } + ; + +/* These are the operands other than the first string and colon + in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */ +asm_operands: /* empty */ + { $$ = NULL_TREE; } + | nonnull_asm_operands + ; + +nonnull_asm_operands: + asm_operand + | nonnull_asm_operands ',' asm_operand + { $$ = chainon ($$, $3); } + ; + +asm_operand: + STRING '(' expr ')' + { $$ = build_tree_list ($$, $3); } + ; + +asm_clobbers: + STRING + { $$ = tree_cons (NULL_TREE, $$, NULL_TREE); } + | asm_clobbers ',' STRING + { $$ = tree_cons (NULL_TREE, $3, $$); } + ; + +/* This is what appears inside the parens in a function declarator. + Its value is represented in the format that grokdeclarator expects. + + In C++, declaring a function with no parameters + means that that function takes *no* parameters. */ +parmlist: /* empty */ + { + if (strict_prototype) + $$ = void_list_node; + else + $$ = NULL_TREE; + } + | parms + { + $$ = chainon ($$, void_list_node); + TREE_PARMLIST ($$) = 1; + } + | parms ',' ELLIPSIS + { + TREE_PARMLIST ($$) = 1; + } + /* C++ allows an ellipsis without a separating ',' */ + | parms ELLIPSIS + { + TREE_PARMLIST ($$) = 1; + } + | ELLIPSIS + { + /* ARM $8.2.5 has this as a boxed-off comment. */ + if (pedantic) + warning ("use of `...' without a first argument is non-portable"); + $$ = NULL_TREE; + } + | TYPENAME_ELLIPSIS + { + TREE_PARMLIST ($$) = 1; + } + | parms TYPENAME_ELLIPSIS + { + TREE_PARMLIST ($$) = 1; + } + | parms ':' + { + /* This helps us recover from really nasty + parse errors, for example, a missing right + parenthesis. */ + yyerror ("possibly missing ')'"); + $$ = chainon ($$, void_list_node); + TREE_PARMLIST ($$) = 1; + yyungetc (':', 0); + yychar = ')'; + } + ; + +/* A nonempty list of parameter declarations or type names. */ +parms: + parm + { $$ = build_tree_list (NULL_TREE, $$); } + | parm '=' init + { $$ = build_tree_list ($3, $$); } + | parms ',' parm + { $$ = chainon ($$, build_tree_list (NULL_TREE, $3)); } + | parms ',' parm '=' init + { $$ = chainon ($$, build_tree_list ($5, $3)); } + | parms ',' bad_parm + { $$ = chainon ($$, build_tree_list (NULL_TREE, $3)); } + | parms ',' bad_parm '=' init + { $$ = chainon ($$, build_tree_list ($5, $3)); } + ; + +/* A single parameter declaration or parameter type name, + as found in a parmlist. The first four cases make up for 10% + of the time spent parsing C++. We cannot use them because + of `int id[]' which won't get parsed properly. */ +parm: +/* + typed_declspecs dont_see_typename '*' IDENTIFIER + { $$ = build_tree_list ($$, build_parse_node (INDIRECT_REF, $4)); + see_typename (); } + | typed_declspecs dont_see_typename '&' IDENTIFIER + { $$ = build_tree_list ($$, build_parse_node (ADDR_EXPR, $4)); + see_typename (); } + | TYPENAME IDENTIFIER + { $$ = build_tree_list (list_hash_lookup_or_cons ($$), $2); } + | TYPESPEC IDENTIFIER + { $$ = build_tree_list (list_hash_lookup_or_cons ($$), $2); } + | */ + typed_declspecs dont_see_typename abs_or_notype_decl + { $$ = build_tree_list ($$, $3); + see_typename (); } + | declmods dont_see_typename abs_or_notype_decl + { $$ = build_tree_list ($$, $3); + see_typename (); } + ; + +abs_or_notype_decl: absdcl + | notype_declarator + | START_DECLARATOR notype_declarator + { $$ = $2; } + ; + +see_typename: type_quals + { see_typename (); } + ; + +dont_see_typename: %prec EMPTY /* empty */ + { dont_see_typename (); } + ; + +/* +try_for_typename: + { + if ($<ttype>-1 == error_mark_node) + $$ = 0; + else + { + $$ = 1; + pushclass ($<ttype>-1, 1); + } + } + ; +*/ + +bad_parm: + abs_or_notype_decl + { + warning ("type specifier omitted for parameter"); + $$ = build_tree_list (TREE_PURPOSE (TREE_VALUE ($<ttype>-1)), $$); + } + ; + +maybe_raises: + %prec EMPTY /* empty */ + { $$ = NULL_TREE; } + | RAISES raise_identifiers %prec EMPTY + { $$ = $2; } + | ANSI_THROW '(' ansi_raise_identifiers ')' %prec EMPTY + { $$ = $3; } + ; + +raise_identifier: + ALL + { $$ = void_list_node; } + | IDENTIFIER + { $$ = build_decl_list (NULL_TREE, $$); } + | TYPENAME + { $$ = build_decl_list (NULL_TREE, $$); } + | SCOPE IDENTIFIER + { $$ = build_decl_list (void_type_node, $2); } + | SCOPE TYPENAME + { $$ = build_decl_list (void_type_node, $2); } + | id_scope IDENTIFIER + { $$ = build_decl_list ($$, $2); } + | scoped_typename + ; + +ansi_raise_identifier: + typename + { $$ = build_decl_list (NULL_TREE, $$); } + ; + +raise_identifiers: + raise_identifier + | raise_identifiers ',' raise_identifier + { + TREE_CHAIN ($3) = $$; + $$ = $3; + } + ; + +ansi_raise_identifiers: + ansi_raise_identifier + | ansi_raise_identifiers ',' ansi_raise_identifier + { + TREE_CHAIN ($3) = $$; + $$ = $3; + } + ; + +operator_name: + OPERATOR '*' + { $$ = ansi_opname[MULT_EXPR]; } + | OPERATOR '/' + { $$ = ansi_opname[TRUNC_DIV_EXPR]; } + | OPERATOR '%' + { $$ = ansi_opname[TRUNC_MOD_EXPR]; } + | OPERATOR '+' + { $$ = ansi_opname[PLUS_EXPR]; } + | OPERATOR '-' + { $$ = ansi_opname[MINUS_EXPR]; } + | OPERATOR '&' + { $$ = ansi_opname[BIT_AND_EXPR]; } + | OPERATOR '|' + { $$ = ansi_opname[BIT_IOR_EXPR]; } + | OPERATOR '^' + { $$ = ansi_opname[BIT_XOR_EXPR]; } + | OPERATOR '~' + { $$ = ansi_opname[BIT_NOT_EXPR]; } + | OPERATOR ',' + { $$ = ansi_opname[COMPOUND_EXPR]; } + | OPERATOR ARITHCOMPARE + { $$ = ansi_opname[$2]; } + | OPERATOR '<' + { $$ = ansi_opname[LT_EXPR]; } + | OPERATOR '>' + { $$ = ansi_opname[GT_EXPR]; } + | OPERATOR EQCOMPARE + { $$ = ansi_opname[$2]; } + | OPERATOR ASSIGN + { $$ = ansi_assopname[$2]; } + | OPERATOR '=' + { $$ = ansi_opname [MODIFY_EXPR]; } + | OPERATOR LSHIFT + { $$ = ansi_opname[$2]; } + | OPERATOR RSHIFT + { $$ = ansi_opname[$2]; } + | OPERATOR PLUSPLUS + { $$ = ansi_opname[POSTINCREMENT_EXPR]; } + | OPERATOR MINUSMINUS + { $$ = ansi_opname[PREDECREMENT_EXPR]; } + | OPERATOR ANDAND + { $$ = ansi_opname[TRUTH_ANDIF_EXPR]; } + | OPERATOR OROR + { $$ = ansi_opname[TRUTH_ORIF_EXPR]; } + | OPERATOR '!' + { $$ = ansi_opname[TRUTH_NOT_EXPR]; } + | OPERATOR '?' ':' + { $$ = ansi_opname[COND_EXPR]; } + | OPERATOR MIN_MAX + { $$ = ansi_opname[$2]; } + | OPERATOR POINTSAT %prec EMPTY + { $$ = ansi_opname[COMPONENT_REF]; } + | OPERATOR POINTSAT_STAR %prec EMPTY + { $$ = ansi_opname[MEMBER_REF]; } + | OPERATOR LEFT_RIGHT + { $$ = ansi_opname[CALL_EXPR]; } + | OPERATOR '[' ']' + { $$ = ansi_opname[ARRAY_REF]; } + | OPERATOR NEW + { $$ = ansi_opname[NEW_EXPR]; } +/* + | OPERATOR NEW '[' ']' + { $$ = ansi_opname[VEC_NEW_EXPR]; } +*/ + | OPERATOR DELETE + { $$ = ansi_opname[DELETE_EXPR]; } +/* + | OPERATOR DELETE '[' ']' + { $$ = ansi_opname[VEC_DELETE_EXPR]; } +*/ + + /* These should do `groktypename' and set up TREE_HAS_X_CONVERSION + here, rather than doing it in class.c . */ + | OPERATOR typed_typespecs absdcl + { $$ = build1 (TYPE_EXPR, $2, $3); } + | OPERATOR error + { $$ = ansi_opname[ERROR_MARK]; } + ; + +%% diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c new file mode 100644 index 0000000..0727e9a --- /dev/null +++ b/gcc/cp/pt.c @@ -0,0 +1,2311 @@ +/* Handle parameterized types (templates) for GNU C++. + Copyright (C) 1992, 1993 Free Software Foundation, Inc. + Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Known bugs or deficiencies include: + * templates for class static data don't work (methods only) + * duplicated method templates can crash the compiler + * interface/impl data is taken from file defining the template + * all methods must be provided in header files; can't use a source + file that contains only the method templates and "just win" + * method templates must be seen before the expansion of the + class template is done + */ + +#include "config.h" +#include <stdio.h> +#include "obstack.h" + +#include "tree.h" +#include "flags.h" +#include "cp-tree.h" +#include "decl.h" +#include "parse.h" + +extern struct obstack permanent_obstack; +extern tree grokdeclarator (); + +extern int lineno; +extern char *input_filename; +struct pending_inline *pending_template_expansions; + +int processing_template_decl; +int processing_template_defn; + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +static int unify (); +static void add_pending_template (); + +void overload_template_name (), pop_template_decls (); + +/* We've got a template header coming up; set obstacks up to save the + nodes created permanently. (There might be cases with nested templates + where we don't have to do this, but they aren't implemented, and it + probably wouldn't be worth the effort.) */ +void +begin_template_parm_list () +{ + pushlevel (0); + push_obstacks (&permanent_obstack, &permanent_obstack); + pushlevel (0); +} + +/* Process information from new template parameter NEXT and append it to the + LIST being built. The rules for use of a template parameter type name + by later parameters are not well-defined for us just yet. However, the + only way to avoid having to parse expressions of unknown complexity (and + with tokens of unknown types) is to disallow it completely. So for now, + that is what is assumed. */ +tree +process_template_parm (list, next) + tree list, next; +{ + tree parm; + tree decl = 0; + int is_type; + parm = next; + my_friendly_assert (TREE_CODE (parm) == TREE_LIST, 259); + is_type = TREE_CODE (TREE_PURPOSE (parm)) == IDENTIFIER_NODE; + if (!is_type) + { + tree tinfo = 0; + int idx = 0; + parm = TREE_PURPOSE (parm); + my_friendly_assert (TREE_CODE (parm) == TREE_LIST, 260); + parm = TREE_VALUE (parm); + /* is a const-param */ + parm = grokdeclarator (TREE_VALUE (next), TREE_PURPOSE (next), + PARM, 0, NULL_TREE); + /* A template parameter is not modifiable. */ + TREE_READONLY (parm) = 1; + if (TREE_CODE (TREE_TYPE (parm)) == RECORD_TYPE + || TREE_CODE (TREE_TYPE (parm)) == UNION_TYPE) + { + sorry ("aggregate template parameter types"); + TREE_TYPE (parm) = void_type_node; + } + tinfo = make_node (TEMPLATE_CONST_PARM); + my_friendly_assert (TREE_PERMANENT (tinfo), 260.5); + if (TREE_PERMANENT (parm) == 0) + { + parm = copy_node (parm); + TREE_PERMANENT (parm) = 1; + } + TREE_TYPE (tinfo) = TREE_TYPE (parm); + decl = build_decl (CONST_DECL, DECL_NAME (parm), TREE_TYPE (parm)); + DECL_INITIAL (decl) = tinfo; + DECL_INITIAL (parm) = tinfo; + } + else + { + tree t = make_node (TEMPLATE_TYPE_PARM); + decl = build_lang_decl (TYPE_DECL, TREE_PURPOSE (parm), t); + TYPE_NAME (t) = decl; + TREE_VALUE (parm) = t; + } + pushdecl (decl); + return chainon (list, parm); +} + +/* The end of a template parameter list has been reached. Process the + tree list into a parameter vector, converting each parameter into a more + useful form. Type parameters are saved as IDENTIFIER_NODEs, and others + as PARM_DECLs. */ + +tree +end_template_parm_list (parms) + tree parms; +{ + int nparms = 0; + tree saved_parmlist; + tree parm; + for (parm = parms; parm; parm = TREE_CHAIN (parm)) + nparms++; + saved_parmlist = make_tree_vec (nparms); + + for (parm = parms, nparms = 0; parm; parm = TREE_CHAIN (parm), nparms++) + { + tree p = parm; + if (TREE_CODE (p) == TREE_LIST) + { + tree t = TREE_VALUE (p); + TREE_VALUE (p) = NULL_TREE; + p = TREE_PURPOSE (p); + my_friendly_assert (TREE_CODE (p) == IDENTIFIER_NODE, 261); + TEMPLATE_TYPE_SET_INFO (t, saved_parmlist, nparms); + } + else + { + tree tinfo = DECL_INITIAL (p); + DECL_INITIAL (p) = NULL_TREE; + TEMPLATE_CONST_SET_INFO (tinfo, saved_parmlist, nparms); + } + TREE_VEC_ELT (saved_parmlist, nparms) = p; + } + set_current_level_tags_transparency (1); + processing_template_decl++; + return saved_parmlist; +} + +/* end_template_decl is called after a template declaration is seen. + D1 is template header; D2 is class_head_sans_basetype or a + TEMPLATE_DECL with its DECL_RESULT field set. */ +void +end_template_decl (d1, d2, is_class) + tree d1, d2, is_class; +{ + tree decl; + struct template_info *tmpl; + + tmpl = (struct template_info *) obstack_alloc (&permanent_obstack, + sizeof (struct template_info)); + tmpl->text = 0; + tmpl->length = 0; + tmpl->aggr = is_class; + + /* cloned from reinit_parse_for_template */ + tmpl->filename = input_filename; + tmpl->lineno = lineno; + tmpl->parm_vec = d1; /* [eichin:19911015.2306EST] */ + + if (d2 == NULL_TREE || d2 == error_mark_node) + { + decl = 0; + goto lose; + } + + if (is_class) + { + decl = build_lang_decl (TEMPLATE_DECL, d2, NULL_TREE); + } + else + { + if (TREE_CODE (d2) == TEMPLATE_DECL) + decl = d2; + else + { + /* Class destructor templates and operator templates are + slipping past as non-template nodes. Process them here, since + I haven't figured out where to catch them earlier. I could + go do that, but it's a choice between getting that done and + staying only N months behind schedule. Sorry.... */ + enum tree_code code; + my_friendly_assert (TREE_CODE (d2) == CALL_EXPR, 263); + code = TREE_CODE (TREE_OPERAND (d2, 0)); + my_friendly_assert (code == BIT_NOT_EXPR + || code == OP_IDENTIFIER + || code == SCOPE_REF, 264); + d2 = grokdeclarator (d2, NULL_TREE, MEMFUNCDEF, 0, NULL_TREE); + decl = build_lang_decl (TEMPLATE_DECL, DECL_NAME (d2), + TREE_TYPE (d2)); + DECL_TEMPLATE_RESULT (decl) = d2; + DECL_CONTEXT (decl) = DECL_CONTEXT (d2); + DECL_CLASS_CONTEXT (decl) = DECL_CLASS_CONTEXT (d2); + DECL_NAME (decl) = DECL_NAME (d2); + TREE_TYPE (decl) = TREE_TYPE (d2); + if (interface_unknown && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (decl)) + warn_if_unknown_interface (); + TREE_PUBLIC (decl) = TREE_PUBLIC (d2) = flag_external_templates && !interface_unknown; + DECL_EXTERNAL (decl) = (DECL_EXTERNAL (d2) + && !(DECL_CLASS_CONTEXT (d2) + && !DECL_THIS_EXTERN (d2))); + } + + /* All routines creating TEMPLATE_DECL nodes should now be using + build_lang_decl, which will have set this up already. */ + my_friendly_assert (DECL_LANG_SPECIFIC (decl) != 0, 265); + + /* @@ Somewhere, permanent allocation isn't being used. */ + if (! DECL_TEMPLATE_IS_CLASS (decl) + && TREE_CODE (DECL_TEMPLATE_RESULT (decl)) == FUNCTION_DECL) + { + tree result = DECL_TEMPLATE_RESULT (decl); + /* Will do nothing if allocation was already permanent. */ + DECL_ARGUMENTS (result) = copy_to_permanent (DECL_ARGUMENTS (result)); + } + + /* If this is for a method, there's an extra binding level here. */ + if (! DECL_TEMPLATE_IS_CLASS (decl) + && DECL_CONTEXT (DECL_TEMPLATE_RESULT (decl)) != NULL_TREE) + { + /* @@ Find out where this should be getting set! */ + tree r = DECL_TEMPLATE_RESULT (decl); + if (DECL_CLASS_CONTEXT (r) == NULL_TREE) + DECL_CLASS_CONTEXT (r) = DECL_CONTEXT (r); + } + } + DECL_TEMPLATE_INFO (decl) = tmpl; + DECL_TEMPLATE_PARMS (decl) = d1; +lose: + if (decl) + { + /* If context of decl is non-null (i.e., method template), add it + to the appropriate class template, and pop the binding levels. */ + if (! DECL_TEMPLATE_IS_CLASS (decl) + && DECL_CONTEXT (DECL_TEMPLATE_RESULT (decl)) != NULL_TREE) + { + tree ctx = DECL_CONTEXT (DECL_TEMPLATE_RESULT (decl)); + tree tmpl; + my_friendly_assert (TREE_CODE (ctx) == UNINSTANTIATED_P_TYPE, 266); + tmpl = UPT_TEMPLATE (ctx); + DECL_TEMPLATE_MEMBERS (tmpl) = + perm_tree_cons (DECL_NAME (decl), decl, + DECL_TEMPLATE_MEMBERS (tmpl)); + poplevel (0, 0, 0); + poplevel (0, 0, 0); + } + /* Otherwise, go back to top level first, and push the template decl + again there. */ + else + { + poplevel (0, 0, 0); + poplevel (0, 0, 0); + if (TREE_TYPE (decl) + && IDENTIFIER_GLOBAL_VALUE (DECL_NAME (decl)) != NULL_TREE) + push_overloaded_decl (decl, 0); + else + pushdecl (decl); + } + } +#if 0 /* It happens sometimes, with syntactic or semantic errors. + + One specific case: + template <class A, int X, int Y> class Foo { ... }; + template <class A, int X, int y> Foo<X,Y>::method (Foo& x) { ... } + Note the missing "A" in the class containing "method". */ + my_friendly_assert (global_bindings_p (), 267); +#else + while (! global_bindings_p ()) + poplevel (0, 0, 0); +#endif + pop_obstacks (); + processing_template_decl--; + (void) get_pending_sizes (); +} + +/* If TYPE contains a template parm type, then substitute that type + with its actual type that is found in TVEC. */ +static void +grok_template_type (tvec, type) + tree tvec; + tree* type; +{ + switch (TREE_CODE (*type)) + { + case TEMPLATE_TYPE_PARM: + if (*type != TYPE_MAIN_VARIANT (*type)) + { + /* we are here for cases like const T* etc. */ + grok_template_type (tvec, &TYPE_MAIN_VARIANT (*type)); + *type = build_type_variant (TYPE_MAIN_VARIANT (*type), + TYPE_READONLY (*type), + TYPE_VOLATILE (*type)); + } + else + *type = TREE_VEC_ELT (tvec, TEMPLATE_TYPE_IDX (*type)); + return; + case POINTER_TYPE: + case REFERENCE_TYPE: + grok_template_type (tvec, &TREE_TYPE (*type)); + return; + case FUNCTION_TYPE: + { + tree p; + + /* take care of function's return type first */ + grok_template_type (tvec, &TREE_TYPE (*type)); + + /* take care of function's arguments */ + for (p = TYPE_ARG_TYPES (*type); p; p = TREE_CHAIN (p)) + grok_template_type (tvec, &TREE_VALUE (p)); + return; + } + default: + break; + } + return; +} + +/* Convert all template arguments to their appropriate types, and return + a vector containing the resulting values. If any error occurs, return + error_mark_node. */ +static tree +coerce_template_parms (parms, arglist, in_decl) + tree parms, arglist; + tree in_decl; +{ + int nparms, i, lost = 0; + tree vec; + + if (TREE_CODE (arglist) == TREE_VEC) + nparms = TREE_VEC_LENGTH (arglist); + else + nparms = list_length (arglist); + if (nparms != TREE_VEC_LENGTH (parms)) + { + error ("incorrect number of parameters (%d, should be %d)", + nparms, TREE_VEC_LENGTH (parms)); + if (in_decl) + cp_error_at ("in template expansion for decl `%D'", in_decl); + return error_mark_node; + } + + if (TREE_CODE (arglist) == TREE_VEC) + vec = copy_node (arglist); + else + { + vec = make_tree_vec (nparms); + for (i = 0; i < nparms; i++) + { + tree arg = arglist; + arglist = TREE_CHAIN (arglist); + if (arg == error_mark_node) + lost++; + else + arg = TREE_VALUE (arg); + TREE_VEC_ELT (vec, i) = arg; + } + } + for (i = 0; i < nparms; i++) + { + tree arg = TREE_VEC_ELT (vec, i); + tree parm = TREE_VEC_ELT (parms, i); + tree val = 0; + int is_type, requires_type; + + is_type = TREE_CODE_CLASS (TREE_CODE (arg)) == 't'; + requires_type = TREE_CODE (parm) == IDENTIFIER_NODE; + if (is_type != requires_type) + { + if (in_decl) + cp_error_at ("type/value mismatch in template parameter list for `%D'", in_decl); + lost++; + TREE_VEC_ELT (vec, i) = error_mark_node; + continue; + } + if (is_type) + val = groktypename (arg); + else if (TREE_CODE (arg) == STRING_CST) + { + cp_error ("string literal %E is not a valid template argument", arg); + error ("because it is the address of an object with static linkage"); + val = error_mark_node; + } + else + { + grok_template_type (vec, &TREE_TYPE (parm)); + val = digest_init (TREE_TYPE (parm), arg, (tree *) 0); + + if (val == error_mark_node) + ; + + /* 14.2: Other template-arguments must be constant-expressions, + addresses of objects or functions with external linkage, or of + static class members. */ + else if (!TREE_CONSTANT (val)) + { + cp_error ("non-const `%E' cannot be used as template argument", + arg); + val = error_mark_node; + } + else if (TREE_CODE (val) == ADDR_EXPR) + { + tree a = TREE_OPERAND (val, 0); + if ((TREE_CODE (a) == VAR_DECL + || TREE_CODE (a) == FUNCTION_DECL) + && !TREE_PUBLIC (a)) + { + cp_error ("address of non-extern `%E' cannot be used as template argument", a); + val = error_mark_node; + } + } + } + + if (val == error_mark_node) + lost++; + + TREE_VEC_ELT (vec, i) = val; + } + if (lost) + return error_mark_node; + return vec; +} + +/* Given class template name and parameter list, produce a user-friendly name + for the instantiation. */ +static char * +mangle_class_name_for_template (name, parms, arglist) + char *name; + tree parms, arglist; +{ + static struct obstack scratch_obstack; + static char *scratch_firstobj; + int i, nparms; + char ibuf[100]; + + if (!scratch_firstobj) + { + gcc_obstack_init (&scratch_obstack); + scratch_firstobj = obstack_alloc (&scratch_obstack, 1); + } + else + obstack_free (&scratch_obstack, scratch_firstobj); + +#if 0 +#define buflen sizeof(buf) +#define check if (bufp >= buf+buflen-1) goto too_long +#define ccat(c) *bufp++=(c); check +#define advance bufp+=strlen(bufp); check +#define cat(s) strncpy(bufp, s, buf+buflen-bufp-1); advance +#else +#define check +#define ccat(c) obstack_1grow (&scratch_obstack, (c)); +#define advance +#define cat(s) obstack_grow (&scratch_obstack, (s), strlen (s)) +#endif +#define icat(n) sprintf(ibuf,"%d",(n)); cat(ibuf) +#define xcat(n) sprintf(ibuf,"%ux",n); cat(ibuf) + + cat (name); + ccat ('<'); + nparms = TREE_VEC_LENGTH (parms); + my_friendly_assert (nparms == TREE_VEC_LENGTH (arglist), 268); + for (i = 0; i < nparms; i++) + { + tree parm = TREE_VEC_ELT (parms, i), arg = TREE_VEC_ELT (arglist, i); + + if (i) + ccat (','); + + if (TREE_CODE (parm) == IDENTIFIER_NODE) + { + cat (type_as_string (arg, 0)); + continue; + } + else + my_friendly_assert (TREE_CODE (parm) == PARM_DECL, 269); + + if (TREE_CODE (arg) == TREE_LIST) + { + /* New list cell was built because old chain link was in + use. */ + my_friendly_assert (TREE_PURPOSE (arg) == NULL_TREE, 270); + arg = TREE_VALUE (arg); + } + /* No need to check arglist against parmlist here; we did that + in coerce_template_parms, called from lookup_template_class. */ + cat (expr_as_string (arg, 0)); + } + { + char *bufp = obstack_next_free (&scratch_obstack); + int offset = 0; + while (bufp[offset - 1] == ' ') + offset--; + obstack_blank_fast (&scratch_obstack, offset); + + /* B<C<char> >, not B<C<char>> */ + if (bufp[offset - 1] == '>') + ccat (' '); + } + ccat ('>'); + ccat ('\0'); + return (char *) obstack_base (&scratch_obstack); + + too_long: + fatal ("out of (preallocated) string space creating template instantiation name"); + /* NOTREACHED */ + return NULL; +} + +/* Given an IDENTIFIER_NODE (type TEMPLATE_DECL) and a chain of + parameters, find the desired type. + + D1 is the PTYPENAME terminal, and ARGLIST is the list of arguments. + Since ARGLIST is build on the decl_obstack, we must copy it here + to keep it from being reclaimed when the decl storage is reclaimed. + + IN_DECL, if non-NULL, is the template declaration we are trying to + instantiate. */ +tree +lookup_template_class (d1, arglist, in_decl) + tree d1, arglist; + tree in_decl; +{ + tree template, parmlist; + char *mangled_name; + tree id; + + my_friendly_assert (TREE_CODE (d1) == IDENTIFIER_NODE, 272); + template = IDENTIFIER_GLOBAL_VALUE (d1); /* XXX */ + if (! template) + template = IDENTIFIER_CLASS_VALUE (d1); + /* With something like `template <class T> class X class X { ... };' + we could end up with D1 having nothing but an IDENTIFIER_LOCAL_VALUE. + We don't want to do that, but we have to deal with the situation, so + let's give them some syntax errors to chew on instead of a crash. */ + if (! template) + return error_mark_node; + if (TREE_CODE (template) != TEMPLATE_DECL) + { + cp_error ("non-template type `%T' used as a template", d1); + if (in_decl) + cp_error_at ("for template declaration `%D'", in_decl); + return error_mark_node; + } + parmlist = DECL_TEMPLATE_PARMS (template); + + arglist = coerce_template_parms (parmlist, arglist, in_decl); + if (arglist == error_mark_node) + return error_mark_node; + if (uses_template_parms (arglist)) + { + tree t = make_lang_type (UNINSTANTIATED_P_TYPE); + tree d; + id = make_anon_name (); + d = build_lang_decl (TYPE_DECL, id, t); + TYPE_NAME (t) = d; + TYPE_VALUES (t) = build_tree_list (template, arglist); + pushdecl_top_level (d); + } + else + { + mangled_name = mangle_class_name_for_template (IDENTIFIER_POINTER (d1), + parmlist, arglist); + id = get_identifier (mangled_name); + } + if (!IDENTIFIER_TEMPLATE (id)) + { + arglist = copy_to_permanent (arglist); + IDENTIFIER_TEMPLATE (id) = perm_tree_cons (template, arglist, NULL_TREE); + } + return id; +} + +void +push_template_decls (parmlist, arglist, class_level) + tree parmlist, arglist; + int class_level; +{ + int i, nparms; + + /* Don't want to push values into global context. */ + if (!class_level) + pushlevel (0); + nparms = TREE_VEC_LENGTH (parmlist); + + for (i = 0; i < nparms; i++) + { + int requires_type, is_type; + tree parm = TREE_VEC_ELT (parmlist, i); + tree arg = TREE_VEC_ELT (arglist, i); + tree decl = 0; + + requires_type = TREE_CODE (parm) == IDENTIFIER_NODE; + is_type = TREE_CODE_CLASS (TREE_CODE (arg)) == 't'; + if (is_type) + { + /* add typename to namespace */ + if (!requires_type) + { + error ("template use error: type provided where value needed"); + continue; + } + decl = arg; + my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl)) == 't', 273); + decl = build_lang_decl (TYPE_DECL, parm, decl); + } + else + { + /* add const decl to namespace */ + tree val; + if (requires_type) + { + error ("template use error: value provided where type needed"); + continue; + } + val = digest_init (TREE_TYPE (parm), arg, (tree *) 0); + if (val != error_mark_node) + { + decl = build_decl (VAR_DECL, DECL_NAME (parm), TREE_TYPE (parm)); + DECL_INITIAL (decl) = val; + TREE_READONLY (decl) = 1; + } + } + if (decl != 0) + { + layout_decl (decl, 0); + if (class_level) + pushdecl_class_level (decl); + else + pushdecl (decl); + } + } + if (!class_level) + set_current_level_tags_transparency (1); +} + +void +pop_template_decls (parmlist, arglist, class_level) + tree parmlist, arglist; + int class_level; +{ + if (!class_level) + poplevel (0, 0, 0); +} + +/* Should be defined in cp-parse.h. */ +extern int yychar; + +int +uses_template_parms (t) + tree t; +{ + if (!t) + return 0; + switch (TREE_CODE (t)) + { + case INDIRECT_REF: + case COMPONENT_REF: + /* We assume that the object must be instantiated in order to build + the COMPONENT_REF, so we test only whether the type of the + COMPONENT_REF uses template parms. */ + return uses_template_parms (TREE_TYPE (t)); + + case IDENTIFIER_NODE: + if (!IDENTIFIER_TEMPLATE (t)) + return 0; + return uses_template_parms (TREE_VALUE (IDENTIFIER_TEMPLATE (t))); + + /* aggregates of tree nodes */ + case TREE_VEC: + { + int i = TREE_VEC_LENGTH (t); + while (i--) + if (uses_template_parms (TREE_VEC_ELT (t, i))) + return 1; + return 0; + } + case TREE_LIST: + if (uses_template_parms (TREE_PURPOSE (t)) + || uses_template_parms (TREE_VALUE (t))) + return 1; + return uses_template_parms (TREE_CHAIN (t)); + + /* constructed type nodes */ + case POINTER_TYPE: + case REFERENCE_TYPE: + return uses_template_parms (TREE_TYPE (t)); + case RECORD_TYPE: + case UNION_TYPE: + if (!TYPE_NAME (t)) + return 0; + if (!TYPE_IDENTIFIER (t)) + return 0; + return uses_template_parms (TYPE_IDENTIFIER (t)); + case FUNCTION_TYPE: + if (uses_template_parms (TYPE_ARG_TYPES (t))) + return 1; + return uses_template_parms (TREE_TYPE (t)); + case ARRAY_TYPE: + if (uses_template_parms (TYPE_DOMAIN (t))) + return 1; + return uses_template_parms (TREE_TYPE (t)); + case OFFSET_TYPE: + if (uses_template_parms (TYPE_OFFSET_BASETYPE (t))) + return 1; + return uses_template_parms (TREE_TYPE (t)); + case METHOD_TYPE: + if (uses_template_parms (TYPE_OFFSET_BASETYPE (t))) + return 1; + if (uses_template_parms (TYPE_ARG_TYPES (t))) + return 1; + return uses_template_parms (TREE_TYPE (t)); + + /* decl nodes */ + case TYPE_DECL: + return uses_template_parms (DECL_NAME (t)); + case FUNCTION_DECL: + if (uses_template_parms (TREE_TYPE (t))) + return 1; + /* fall through */ + case VAR_DECL: + case PARM_DECL: + /* ??? What about FIELD_DECLs? */ + /* The type of a decl can't use template parms if the name of the + variable doesn't, because it's impossible to resolve them. So + ignore the type field for now. */ + if (DECL_CONTEXT (t) && uses_template_parms (DECL_CONTEXT (t))) + return 1; + if (uses_template_parms (TREE_TYPE (t))) + { + error ("template parms used where they can't be resolved"); + } + return 0; + + case CALL_EXPR: + return uses_template_parms (TREE_TYPE (t)); + case ADDR_EXPR: + return uses_template_parms (TREE_OPERAND (t, 0)); + + /* template parm nodes */ + case TEMPLATE_TYPE_PARM: + case TEMPLATE_CONST_PARM: + return 1; + + /* simple type nodes */ + case INTEGER_TYPE: + if (uses_template_parms (TYPE_MIN_VALUE (t))) + return 1; + return uses_template_parms (TYPE_MAX_VALUE (t)); + + case REAL_TYPE: + case VOID_TYPE: + case ENUMERAL_TYPE: + return 0; + + /* constants */ + case INTEGER_CST: + case REAL_CST: + case STRING_CST: + return 0; + + case ERROR_MARK: + /* Non-error_mark_node ERROR_MARKs are bad things. */ + my_friendly_assert (t == error_mark_node, 274); + /* NOTREACHED */ + return 0; + + case UNINSTANTIATED_P_TYPE: + return 1; + + default: + switch (TREE_CODE_CLASS (TREE_CODE (t))) + { + case '1': + case '2': + case '3': + case '<': + { + int i; + for (i = tree_code_length[(int) TREE_CODE (t)]; --i >= 0;) + if (uses_template_parms (TREE_OPERAND (t, i))) + return 1; + return 0; + } + default: + break; + } + sorry ("testing %s for template parms", + tree_code_name [(int) TREE_CODE (t)]); + my_friendly_abort (82); + /* NOTREACHED */ + return 0; + } +} + +void +instantiate_member_templates (classname) + tree classname; +{ + tree t; + tree id = classname; + tree members = DECL_TEMPLATE_MEMBERS (TREE_PURPOSE (IDENTIFIER_TEMPLATE (id))); + + for (t = members; t; t = TREE_CHAIN (t)) + { + tree parmvec, type, classparms, tdecl, t2; + int nparms, xxx = 0, i; + + my_friendly_assert (TREE_VALUE (t) != NULL_TREE, 275); + my_friendly_assert (TREE_CODE (TREE_VALUE (t)) == TEMPLATE_DECL, 276); + /* @@ Should verify that class parm list is a list of + distinct template parameters, and covers all the template + parameters. */ + tdecl = TREE_VALUE (t); + type = DECL_CONTEXT (DECL_TEMPLATE_RESULT (tdecl)); + classparms = UPT_PARMS (type); + nparms = TREE_VEC_LENGTH (classparms); + parmvec = make_tree_vec (nparms); + for (i = 0; i < nparms; i++) + TREE_VEC_ELT (parmvec, i) = NULL_TREE; + switch (unify (DECL_TEMPLATE_PARMS (tdecl), + &TREE_VEC_ELT (parmvec, 0), nparms, + type, IDENTIFIER_TYPE_VALUE (classname), + &xxx)) + { + case 0: + /* Success -- well, no inconsistency, at least. */ + for (i = 0; i < nparms; i++) + if (TREE_VEC_ELT (parmvec, i) == NULL_TREE) + goto failure; + t2 = instantiate_template (tdecl, + &TREE_VEC_ELT (parmvec, 0)); + type = IDENTIFIER_TYPE_VALUE (id); + my_friendly_assert (type != 0, 277); + if (CLASSTYPE_INTERFACE_UNKNOWN (type)) + { + DECL_EXTERNAL (t2) = 0; + TREE_PUBLIC (t2) = 0; + } + else + { + DECL_EXTERNAL (t2) = CLASSTYPE_INTERFACE_ONLY (type); + TREE_PUBLIC (t2) = 1; + } + break; + case 1: + /* Failure. */ + failure: + cp_error ("type unification error instantiating %T::%D", + classname, tdecl); + cp_error_at ("for template declaration `%D'", tdecl); + + continue /* loop of members */; + default: + /* Eek, a bug. */ + my_friendly_abort (83); + } + } +} + +struct tinst_level *current_tinst_level = 0; +struct tinst_level *free_tinst_level = 0; + +void +push_tinst_level (name) + tree name; +{ + struct tinst_level *new; + tree global = IDENTIFIER_GLOBAL_VALUE (name); + + if (free_tinst_level) + { + new = free_tinst_level; + free_tinst_level = new->next; + } + else + new = (struct tinst_level *) xmalloc (sizeof (struct tinst_level)); + + new->classname = name; + if (global) + { + new->line = DECL_SOURCE_LINE (global); + new->file = DECL_SOURCE_FILE (global); + } + else + { + new->line = lineno; + new->file = input_filename; + } + new->next = current_tinst_level; + current_tinst_level = new; +} + +void +pop_tinst_level () +{ + struct tinst_level *old = current_tinst_level; + + current_tinst_level = old->next; + old->next = free_tinst_level; + free_tinst_level = old; +} + +struct tinst_level * +tinst_for_decl () +{ + struct tinst_level *p = current_tinst_level; + + if (p) + for (; p->next ; p = p->next ) + ; + return p; +} + +tree +instantiate_class_template (classname, setup_parse) + tree classname; + int setup_parse; +{ + struct template_info *template_info; + tree template, t1; + + if (classname == error_mark_node) + return error_mark_node; + + my_friendly_assert (TREE_CODE (classname) == IDENTIFIER_NODE, 278); + template = IDENTIFIER_TEMPLATE (classname); + + if (IDENTIFIER_HAS_TYPE_VALUE (classname)) + { + tree type = IDENTIFIER_TYPE_VALUE (classname); + if (TREE_CODE (type) == UNINSTANTIATED_P_TYPE) + return type; + if (TYPE_BEING_DEFINED (type) + || TYPE_SIZE (type) + || CLASSTYPE_USE_TEMPLATE (type) != 0) + return type; + } + + /* If IDENTIFIER_LOCAL_VALUE is already set on this template classname + (it's something like `foo<int>'), that means we're already working on + the instantiation for it. Normally, a classname comes in with nothing + but its IDENTIFIER_TEMPLATE slot set. If we were to try to instantiate + this again, we'd get a redeclaration error. Since we're already working + on it, we'll pass back this classname's TYPE_DECL (it's the value of + the classname's IDENTIFIER_LOCAL_VALUE). Only do this if we're setting + things up for the parser, though---if we're just trying to instantiate + it (e.g., via tsubst) we can trip up cuz it may not have an + IDENTIFIER_TYPE_VALUE when it will need one. */ + if (setup_parse && IDENTIFIER_LOCAL_VALUE (classname)) + return IDENTIFIER_LOCAL_VALUE (classname); + + if (uses_template_parms (classname)) + { + if (!TREE_TYPE (classname)) + { + tree t = make_lang_type (RECORD_TYPE); + tree d = build_lang_decl (TYPE_DECL, classname, t); + DECL_NAME (d) = classname; + TYPE_NAME (t) = d; + pushdecl (d); + } + return NULL_TREE; + } + + t1 = TREE_PURPOSE (template); + my_friendly_assert (TREE_CODE (t1) == TEMPLATE_DECL, 279); + + /* If a template is declared but not defined, accept it; don't crash. + Later uses requiring the definition will be flagged as errors by + other code. Thanks to niklas@appli.se for this bug fix. */ + if (DECL_TEMPLATE_INFO (t1)->text == 0) + setup_parse = 0; + + push_to_top_level (); + template_info = DECL_TEMPLATE_INFO (t1); + if (setup_parse) + { + push_tinst_level (classname); + push_template_decls (DECL_TEMPLATE_PARMS (TREE_PURPOSE (template)), + TREE_VALUE (template), 0); + set_current_level_tags_transparency (1); + feed_input (template_info->text, template_info->length, (struct obstack *)0); + lineno = template_info->lineno; + input_filename = template_info->filename; + /* Get interface/implementation back in sync. */ + extract_interface_info (); + overload_template_name (classname, 0); + yychar = PRE_PARSED_CLASS_DECL; + yylval.ttype = classname; + processing_template_defn++; + if (!flag_external_templates) + interface_unknown++; + } + else + { + tree t, decl, id, tmpl; + + id = classname; + tmpl = TREE_PURPOSE (IDENTIFIER_TEMPLATE (id)); + t = xref_tag (DECL_TEMPLATE_INFO (tmpl)->aggr, id, NULL_TREE, 0); + my_friendly_assert (TREE_CODE (t) == RECORD_TYPE + || TREE_CODE (t) == UNION_TYPE, 280); + + /* Now, put a copy of the decl in global scope, to avoid + * recursive expansion. */ + decl = IDENTIFIER_LOCAL_VALUE (id); + if (!decl) + decl = IDENTIFIER_CLASS_VALUE (id); + if (decl) + { + my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 281); + /* We'd better make sure we're on the permanent obstack or else + * we'll get a "friendly" abort 124 in pushdecl. Perhaps a + * copy_to_permanent would be sufficient here, but then a + * sharing problem might occur. I don't know -- niklas@appli.se */ + push_obstacks (&permanent_obstack, &permanent_obstack); + pushdecl_top_level (copy_node (decl)); + pop_obstacks (); + } + pop_from_top_level (); + } + + return NULL_TREE; +} + +static int +list_eq (t1, t2) + tree t1, t2; +{ + if (t1 == NULL_TREE) + return t2 == NULL_TREE; + if (t2 == NULL_TREE) + return 0; + /* Don't care if one declares its arg const and the other doesn't -- the + main variant of the arg type is all that matters. */ + if (TYPE_MAIN_VARIANT (TREE_VALUE (t1)) + != TYPE_MAIN_VARIANT (TREE_VALUE (t2))) + return 0; + return list_eq (TREE_CHAIN (t1), TREE_CHAIN (t2)); +} + +static tree +lookup_nested_type_by_name (ctype, name) + tree ctype, name; +{ + tree t; + + t = TREE_VALUE(CLASSTYPE_TAGS(ctype)); + while (t) + { + if (strcmp(IDENTIFIER_POINTER(name), IDENTIFIER_POINTER(TYPE_IDENTIFIER(t))) + == 0) + return t; + else + t = TREE_CHAIN(t); + } + return NULL_TREE; +} + +static tree +search_nested_type_in_tmpl (tmpl, type) + tree tmpl, type; +{ + tree t; + + if (tmpl == NULL || TYPE_CONTEXT(type) == NULL) + return tmpl; + t = search_nested_type_in_tmpl (tmpl, TYPE_CONTEXT(type)); + if (t == NULL) return t; + t = lookup_nested_type_by_name(t, DECL_NAME(TYPE_NAME(type))); + return t; +} + +static tree +tsubst (t, args, nargs, in_decl) + tree t, *args; + int nargs; + tree in_decl; +{ + tree type; + + if (t == NULL_TREE || t == error_mark_node) + return t; + + type = TREE_TYPE (t); + if (type + /* Minor optimization. + ?? Are these really the most frequent cases? Is the savings + significant? */ + && type != integer_type_node + && type != void_type_node + && type != char_type_node) + type = build_type_variant (tsubst (type, args, nargs, in_decl), + TYPE_READONLY (type), + TYPE_VOLATILE (type)); + switch (TREE_CODE (t)) + { + case RECORD_TYPE: + if (TYPE_PTRMEMFUNC_P (t)) + return build_ptrmemfunc_type + (tsubst (TYPE_PTRMEMFUNC_FN_TYPE (t), args, nargs, in_decl)); + + /* else fall through */ + + case ERROR_MARK: + case IDENTIFIER_NODE: + case OP_IDENTIFIER: + case VOID_TYPE: + case REAL_TYPE: + case ENUMERAL_TYPE: + case INTEGER_CST: + case REAL_CST: + case STRING_CST: + case UNION_TYPE: + return t; + + case INTEGER_TYPE: + if (t == integer_type_node) + return t; + + if (TREE_CODE (TYPE_MIN_VALUE (t)) == INTEGER_CST + && TREE_CODE (TYPE_MAX_VALUE (t)) == INTEGER_CST) + return t; + return build_index_2_type + (tsubst (TYPE_MIN_VALUE (t), args, nargs, in_decl), + tsubst (TYPE_MAX_VALUE (t), args, nargs, in_decl)); + + case TEMPLATE_TYPE_PARM: + return build_type_variant (args[TEMPLATE_TYPE_IDX (t)], + TYPE_READONLY (t), + TYPE_VOLATILE (t)); + + case TEMPLATE_CONST_PARM: + return args[TEMPLATE_CONST_IDX (t)]; + + case FUNCTION_DECL: + { + tree r; + tree fnargs, result; + + if (type == TREE_TYPE (t) + && (DECL_CONTEXT (t) == NULL_TREE + || TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (t))) != 't')) + return t; + fnargs = tsubst (DECL_ARGUMENTS (t), args, nargs, t); + result = tsubst (DECL_RESULT (t), args, nargs, t); + if (DECL_CONTEXT (t) != NULL_TREE + && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (t))) == 't') + { + /* Look it up in that class, and return the decl node there, + instead of creating a new one. */ + tree ctx, methods, name, method; + int n_methods; + int i, found = 0; + + name = DECL_NAME (t); + ctx = tsubst (DECL_CONTEXT (t), args, nargs, t); + methods = CLASSTYPE_METHOD_VEC (ctx); + if (methods == NULL_TREE) + /* No methods at all -- no way this one can match. */ + goto no_match; + n_methods = TREE_VEC_LENGTH (methods); + + r = NULL_TREE; + + if (!strncmp (OPERATOR_TYPENAME_FORMAT, + IDENTIFIER_POINTER (name), + sizeof (OPERATOR_TYPENAME_FORMAT) - 1)) + { + /* Type-conversion operator. Reconstruct the name, in + case it's the name of one of the template's parameters. */ + name = build_typename_overload (TREE_TYPE (type)); + } + + if (DECL_CONTEXT (t) != NULL_TREE + && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (t))) == 't' + && constructor_name (DECL_CONTEXT (t)) == DECL_NAME (t)) + name = constructor_name (ctx); +#if 0 + fprintf (stderr, "\nfor function %s in class %s:\n", + IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (TYPE_IDENTIFIER (ctx))); +#endif + for (i = 0; i < n_methods; i++) + { + int pass; + + method = TREE_VEC_ELT (methods, i); + if (method == NULL_TREE || DECL_NAME (method) != name) + continue; + + pass = 0; + maybe_error: + for (; method; method = DECL_CHAIN (method)) + { + my_friendly_assert (TREE_CODE (method) == FUNCTION_DECL, + 282); + if (TREE_TYPE (method) != type) + { + tree mtype = TREE_TYPE (method); + tree t1, t2; + + /* Keep looking for a method that matches + perfectly. This takes care of the problem + where destructors (which have implicit int args) + look like constructors which have an int arg. */ + if (pass == 0) + continue; + + t1 = TYPE_ARG_TYPES (mtype); + t2 = TYPE_ARG_TYPES (type); + if (TREE_CODE (mtype) == FUNCTION_TYPE) + t2 = TREE_CHAIN (t2); + + if (list_eq (t1, t2)) + { + if (TREE_CODE (mtype) == FUNCTION_TYPE) + { + tree newtype; + newtype = build_function_type (TREE_TYPE (type), + TYPE_ARG_TYPES (type)); + newtype = build_type_variant (newtype, + TYPE_READONLY (type), + TYPE_VOLATILE (type)); + type = newtype; + if (TREE_TYPE (type) != TREE_TYPE (mtype)) + goto maybe_bad_return_type; + } + else if (TYPE_METHOD_BASETYPE (mtype) + == TYPE_METHOD_BASETYPE (type)) + { + /* Types didn't match, but arg types and + `this' do match, so the return type is + all that should be messing it up. */ + maybe_bad_return_type: + if (TREE_TYPE (type) != TREE_TYPE (mtype)) + error ("inconsistent return types for method `%s' in class `%s'", + IDENTIFIER_POINTER (name), + IDENTIFIER_POINTER (TYPE_IDENTIFIER (ctx))); + } + r = method; + break; + } + found = 1; + continue; + } +#if 0 + fprintf (stderr, "\tfound %s\n\n", + IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (method))); +#endif + + if (DECL_ARGUMENTS (method) + && ! TREE_PERMANENT (DECL_ARGUMENTS (method))) + /* @@ Is this early enough? Might we want to do + this instead while processing the expansion? */ + DECL_ARGUMENTS (method) + = tsubst (DECL_ARGUMENTS (t), args, nargs, t); + r = method; + break; + } + if (r == NULL_TREE && pass == 0) + { + pass = 1; + method = TREE_VEC_ELT (methods, i); + goto maybe_error; + } + } + if (r == NULL_TREE) + { + no_match: + cp_error + (found + ? "template for method `%D' doesn't match any in class `%T'" + : "method `%D' not found in class `%T'", name, ctx); + if (in_decl) + cp_error_at ("in attempt to instantiate `%D' declared at this point in file", in_decl); + return error_mark_node; + } + } + else + { + r = DECL_NAME (t); + { + tree decls; + int got_it = 0; + + decls = IDENTIFIER_GLOBAL_VALUE (r); + if (decls == NULL_TREE) + /* no match */; + else if (TREE_CODE (decls) == TREE_LIST) + for (decls = TREE_VALUE (decls); decls ; + decls = DECL_CHAIN (decls)) + { + if (TREE_CODE (decls) == FUNCTION_DECL + && TREE_TYPE (decls) == type) + { + got_it = 1; + r = decls; + break; + } + } + else + { + tree val = decls; + decls = NULL_TREE; + if (TREE_CODE (val) == FUNCTION_DECL + && TREE_TYPE (val) == type) + { + got_it = 1; + r = val; + break; + } + } + + if (!got_it) + { + r = build_decl_overload (r, TYPE_VALUES (type), + DECL_CONTEXT (t) != NULL_TREE); + r = build_lang_decl (FUNCTION_DECL, r, type); + } + } + } + TREE_PUBLIC (r) = TREE_PUBLIC (t); + DECL_EXTERNAL (r) = DECL_EXTERNAL (t); + TREE_STATIC (r) = TREE_STATIC (t); + DECL_INLINE (r) = DECL_INLINE (t); + { +#if 0 /* Maybe later. -jason */ + struct tinst_level *til = tinst_for_decl(); + + /* should always be true under new approach */ + if (til) + { + DECL_SOURCE_FILE (r) = til->file; + DECL_SOURCE_LINE (r) = til->line; + } + else +#endif + { + DECL_SOURCE_FILE (r) = DECL_SOURCE_FILE (t); + DECL_SOURCE_LINE (r) = DECL_SOURCE_LINE (t); + } + } + DECL_CLASS_CONTEXT (r) = tsubst (DECL_CLASS_CONTEXT (t), args, nargs, t); + make_decl_rtl (r, NULL_PTR, 1); + DECL_ARGUMENTS (r) = fnargs; + DECL_RESULT (r) = result; + if (DECL_CONTEXT (t) == NULL_TREE + || TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (t))) != 't') + push_overloaded_decl_top_level (r, 0); + return r; + } + + case PARM_DECL: + { + tree r; + r = build_decl (PARM_DECL, DECL_NAME (t), type); + DECL_INITIAL (r) = TREE_TYPE (r); + if (TREE_CHAIN (t)) + TREE_CHAIN (r) = tsubst (TREE_CHAIN (t), args, nargs, TREE_CHAIN (t)); + return r; + } + + case TREE_LIST: + { + tree purpose, value, chain, result; + int via_public, via_virtual, via_protected; + + if (t == void_list_node) + return t; + + via_public = TREE_VIA_PUBLIC (t); + via_protected = TREE_VIA_PROTECTED (t); + via_virtual = TREE_VIA_VIRTUAL (t); + + purpose = TREE_PURPOSE (t); + if (purpose) + purpose = tsubst (purpose, args, nargs, in_decl); + value = TREE_VALUE (t); + if (value) + value = tsubst (value, args, nargs, in_decl); + chain = TREE_CHAIN (t); + if (chain && chain != void_type_node) + chain = tsubst (chain, args, nargs, in_decl); + if (purpose == TREE_PURPOSE (t) + && value == TREE_VALUE (t) + && chain == TREE_CHAIN (t)) + return t; + result = hash_tree_cons (via_public, via_virtual, via_protected, + purpose, value, chain); + TREE_PARMLIST (result) = TREE_PARMLIST (t); + return result; + } + case TREE_VEC: + { + int len = TREE_VEC_LENGTH (t), need_new = 0, i; + tree *elts = (tree *) alloca (len * sizeof (tree)); + bzero (elts, len * sizeof (tree)); + + for (i = 0; i < len; i++) + { + elts[i] = tsubst (TREE_VEC_ELT (t, i), args, nargs, in_decl); + if (elts[i] != TREE_VEC_ELT (t, i)) + need_new = 1; + } + + if (!need_new) + return t; + + t = make_tree_vec (len); + for (i = 0; i < len; i++) + TREE_VEC_ELT (t, i) = elts[i]; + return t; + } + case POINTER_TYPE: + case REFERENCE_TYPE: + { + tree r; + enum tree_code code; + if (type == TREE_TYPE (t)) + return t; + + code = TREE_CODE (t); + if (code == POINTER_TYPE) + r = build_pointer_type (type); + else + r = build_reference_type (type); + r = build_type_variant (r, TYPE_READONLY (t), TYPE_VOLATILE (t)); + /* Will this ever be needed for TYPE_..._TO values? */ + layout_type (r); + return r; + } + case FUNCTION_TYPE: + case METHOD_TYPE: + { + tree values = TYPE_VALUES (t); /* same as TYPE_ARG_TYPES */ + tree context = TYPE_CONTEXT (t); + tree new_value; + + /* Don't bother recursing if we know it won't change anything. */ + if (values != void_list_node) + values = tsubst (values, args, nargs, in_decl); + if (context) + context = tsubst (context, args, nargs, in_decl); + /* Could also optimize cases where return value and + values have common elements (e.g., T min(const &T, const T&). */ + + /* If the above parameters haven't changed, just return the type. */ + if (type == TREE_TYPE (t) + && values == TYPE_VALUES (t) + && context == TYPE_CONTEXT (t)) + return t; + + /* Construct a new type node and return it. */ + if (TREE_CODE (t) == FUNCTION_TYPE + && context == NULL_TREE) + { + new_value = build_function_type (type, values); + } + else if (context == NULL_TREE) + { + tree base = tsubst (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))), + args, nargs, in_decl); + new_value = build_cplus_method_type (base, type, + TREE_CHAIN (values)); + } + else + { + new_value = make_node (TREE_CODE (t)); + TREE_TYPE (new_value) = type; + TYPE_CONTEXT (new_value) = context; + TYPE_VALUES (new_value) = values; + TYPE_SIZE (new_value) = TYPE_SIZE (t); + TYPE_ALIGN (new_value) = TYPE_ALIGN (t); + TYPE_MODE (new_value) = TYPE_MODE (t); + if (TYPE_METHOD_BASETYPE (t)) + TYPE_METHOD_BASETYPE (new_value) = tsubst (TYPE_METHOD_BASETYPE (t), + args, nargs, in_decl); + /* Need to generate hash value. */ + my_friendly_abort (84); + } + new_value = build_type_variant (new_value, + TYPE_READONLY (t), + TYPE_VOLATILE (t)); + return new_value; + } + case ARRAY_TYPE: + { + tree domain = tsubst (TYPE_DOMAIN (t), args, nargs, in_decl); + tree r; + if (type == TREE_TYPE (t) && domain == TYPE_DOMAIN (t)) + return t; + r = build_cplus_array_type (type, domain); + return r; + } + + case UNINSTANTIATED_P_TYPE: + { + int nparms = TREE_VEC_LENGTH (DECL_TEMPLATE_PARMS (UPT_TEMPLATE (t))); + tree argvec = make_tree_vec (nparms); + tree parmvec = UPT_PARMS (t); + int i; + tree id, rt; + for (i = 0; i < nparms; i++) + TREE_VEC_ELT (argvec, i) = tsubst (TREE_VEC_ELT (parmvec, i), + args, nargs, in_decl); + id = lookup_template_class (DECL_NAME (UPT_TEMPLATE (t)), argvec, NULL_TREE); + if (! IDENTIFIER_HAS_TYPE_VALUE (id)) { + instantiate_class_template(id, 0); + /* set up pending_classes */ + add_pending_template (id); + + TYPE_MAIN_VARIANT (IDENTIFIER_TYPE_VALUE (id)) = + IDENTIFIER_TYPE_VALUE (id); + } + rt = IDENTIFIER_TYPE_VALUE (id); + + /* kung: this part handles nested type in template definition */ + + if ( !ANON_AGGRNAME_P (DECL_NAME(TYPE_NAME(t)))) + { + rt = search_nested_type_in_tmpl (rt, t); + } + + return build_type_variant (rt, TYPE_READONLY (t), TYPE_VOLATILE (t)); + } + + case MINUS_EXPR: + case PLUS_EXPR: + return fold (build (TREE_CODE (t), TREE_TYPE (t), + tsubst (TREE_OPERAND (t, 0), args, nargs, in_decl), + tsubst (TREE_OPERAND (t, 1), args, nargs, in_decl))); + + case NEGATE_EXPR: + case NOP_EXPR: + return fold (build1 (TREE_CODE (t), TREE_TYPE (t), + tsubst (TREE_OPERAND (t, 0), args, nargs, in_decl))); + + default: + sorry ("use of `%s' in function template", + tree_code_name [(int) TREE_CODE (t)]); + return error_mark_node; + } +} + +tree +instantiate_template (tmpl, targ_ptr) + tree tmpl, *targ_ptr; +{ + tree targs, fndecl; + int i, len; + struct pending_inline *p; + struct template_info *t; + struct obstack *old_fmp_obstack; + extern struct obstack *function_maybepermanent_obstack; + + push_obstacks (&permanent_obstack, &permanent_obstack); + old_fmp_obstack = function_maybepermanent_obstack; + function_maybepermanent_obstack = &permanent_obstack; + + my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 283); + len = TREE_VEC_LENGTH (DECL_TEMPLATE_PARMS (tmpl)); + + for (fndecl = DECL_TEMPLATE_INSTANTIATIONS (tmpl); + fndecl; fndecl = TREE_CHAIN (fndecl)) + { + tree *t1 = &TREE_VEC_ELT (TREE_PURPOSE (fndecl), 0); + for (i = len - 1; i >= 0; i--) + if (t1[i] != targ_ptr[i]) + goto no_match; + + /* Here, we have a match. */ + fndecl = TREE_VALUE (fndecl); + function_maybepermanent_obstack = old_fmp_obstack; + pop_obstacks (); + return fndecl; + + no_match: + ; + } + + targs = make_tree_vec (len); + i = len; + while (i--) + TREE_VEC_ELT (targs, i) = targ_ptr[i]; + + /* substitute template parameters */ + fndecl = tsubst (DECL_RESULT (tmpl), targ_ptr, + TREE_VEC_LENGTH (targs), tmpl); + + /* If it's a static member fn in the template, we need to change it + into a FUNCTION_TYPE and chop off its this pointer. */ + if (TREE_CODE (TREE_TYPE (DECL_RESULT (tmpl))) == METHOD_TYPE + && fndecl != error_mark_node + && DECL_STATIC_FUNCTION_P (fndecl)) + { + tree olddecl = DECL_RESULT (tmpl); + revert_static_member_fn (&TREE_TYPE (olddecl), &DECL_RESULT (tmpl), + &TYPE_ARG_TYPES (TREE_TYPE (olddecl))); + /* Chop off the this pointer that grokclassfn so kindly added + for us (it didn't know yet if the fn was static or not). */ + DECL_ARGUMENTS (olddecl) = TREE_CHAIN (DECL_ARGUMENTS (olddecl)); + DECL_ARGUMENTS (fndecl) = TREE_CHAIN (DECL_ARGUMENTS (fndecl)); + } + + t = DECL_TEMPLATE_INFO (tmpl); + if (t->text) + { + p = (struct pending_inline *) permalloc (sizeof (struct pending_inline)); + p->parm_vec = t->parm_vec; + p->bindings = targs; + p->can_free = 0; + p->deja_vu = 0; + p->buf = t->text; + p->len = t->length; + p->fndecl = fndecl; + { + int l = lineno; + char * f = input_filename; + + lineno = p->lineno = t->lineno; + input_filename = p->filename = t->filename; + + extract_interface_info (); + + if (interface_unknown && flag_external_templates && ! DECL_IN_SYSTEM_HEADER (tmpl)) + warn_if_unknown_interface (); + if (interface_unknown || !flag_external_templates) + p->interface = 1; /* unknown */ + else + p->interface = interface_only ? 0 : 2; + + lineno = l; + input_filename = f; + + extract_interface_info (); + } + } + else + p = (struct pending_inline *)0; + + DECL_TEMPLATE_INSTANTIATIONS (tmpl) = + tree_cons (targs, fndecl, DECL_TEMPLATE_INSTANTIATIONS (tmpl)); + + function_maybepermanent_obstack = old_fmp_obstack; + pop_obstacks (); + + if (fndecl == error_mark_node || p == (struct pending_inline *)0) + { + /* do nothing */ + } + else if (DECL_INLINE (fndecl)) + { + DECL_PENDING_INLINE_INFO (fndecl) = p; + p->next = pending_inlines; + pending_inlines = p; + } + else + { + p->next = pending_template_expansions; + pending_template_expansions = p; + } + return fndecl; +} + +void +undo_template_name_overload (id, classlevel) + tree id; + int classlevel; +{ + tree template; + + template = IDENTIFIER_TEMPLATE (id); + if (!template) + return; + +#if 0 /* not yet, should get fixed properly later */ + poplevel (0, 0, 0); +#endif +#if 1 /* XXX */ + /* This was a botch... See `overload_template_name' just below. */ + if (!classlevel) + poplevel (0, 0, 0); +#endif +} + +void +overload_template_name (id, classlevel) + tree id; + int classlevel; +{ + tree template, t, decl; + struct template_info *tinfo; + + my_friendly_assert (TREE_CODE (id) == IDENTIFIER_NODE, 284); + template = IDENTIFIER_TEMPLATE (id); + if (!template) + return; + + template = TREE_PURPOSE (template); + tinfo = DECL_TEMPLATE_INFO (template); + template = DECL_NAME (template); + my_friendly_assert (template != NULL_TREE, 285); + +#if 1 /* XXX */ + /* This was a botch... names of templates do not get their own private + scopes. Rather, the names of generated template instances should + just get pushed into whatever scope we happen to be in at the moment. + This will typically (but not always) be the global scope. (Maybe + what we really want to do here is a `push_to_toplevel' and then stay + there while we are generating the instance; popping back out to the + current scope when we are done generating the instance.) */ + if (!classlevel) + { + pushlevel (1); + declare_pseudo_global_level (); + } +#endif + + t = xref_tag (tinfo->aggr, id, NULL_TREE, 0); + my_friendly_assert (TREE_CODE (t) == RECORD_TYPE + || TREE_CODE (t) == UNION_TYPE + || TREE_CODE (t) == UNINSTANTIATED_P_TYPE, 286); + + decl = build_decl (TYPE_DECL, template, t); + +#if 0 /* fix this later */ + /* We don't want to call here if the work has already been done. */ + t = (classlevel + ? IDENTIFIER_CLASS_VALUE (template) + : IDENTIFIER_LOCAL_VALUE (template)); + if (t + && TREE_CODE (t) == TYPE_DECL + && TREE_TYPE (t) == t) + my_friendly_abort (85); +#endif + + if (classlevel) + pushdecl_class_level (decl); + else +#if 0 /* not yet, should get fixed properly later */ + pushdecl (decl); + pushlevel (1); +#else + { + pushdecl (decl); + /* @@ Is this necessary now? */ + IDENTIFIER_LOCAL_VALUE (template) = decl; + } +#endif + + /* Fake this for now, just to make dwarfout.c happy. It will have to + be done in a proper way later on. */ + DECL_CONTEXT (decl) = t; +} + +/* NAME is the IDENTIFIER value of a PRE_PARSED_CLASS_DECL. */ +void +end_template_instantiation (name) + tree name; +{ + extern struct pending_input *to_be_restored; + tree t, decl; + + processing_template_defn--; + if (!flag_external_templates) + interface_unknown--; + + /* Restore the old parser input state. */ + if (yychar == YYEMPTY) + yychar = yylex (); + if (yychar != END_OF_SAVED_INPUT) + error ("parse error at end of class template"); + else + { + restore_pending_input (to_be_restored); + to_be_restored = 0; + } + + /* Our declarations didn't get stored in the global slot, since + there was a (supposedly tags-transparent) scope in between. */ + t = IDENTIFIER_TYPE_VALUE (name); + my_friendly_assert (t != NULL_TREE + && TREE_CODE_CLASS (TREE_CODE (t)) == 't', + 287); + CLASSTYPE_USE_TEMPLATE (t) = 2; + /* Make methods of template classes static, unless + -fexternal-templates is given. */ + if (!flag_external_templates) + SET_CLASSTYPE_INTERFACE_UNKNOWN (t); + decl = IDENTIFIER_GLOBAL_VALUE (name); + my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 288); + + undo_template_name_overload (name, 0); + t = IDENTIFIER_TEMPLATE (name); + pop_template_decls (DECL_TEMPLATE_PARMS (TREE_PURPOSE (t)), TREE_VALUE (t), + 0); + /* This will fix up the type-value field. */ + pushdecl (decl); + pop_from_top_level (); + +#ifdef DWARF_DEBUGGING_INFO + if (write_symbols == DWARF_DEBUG && TREE_CODE (decl) == TYPE_DECL) + { + /* We just completed the definition of a new file-scope type, + so we can go ahead and output debug-info for it now. */ + TYPE_STUB_DECL (TREE_TYPE (decl)) = decl; + rest_of_type_compilation (TREE_TYPE (decl), 1); + } +#endif /* DWARF_DEBUGGING_INFO */ + + /* Restore interface/implementation settings. */ + extract_interface_info (); +} + +/* Store away the text of an inline template function. No rtl is + generated for this function until it is actually needed. */ + +void +reinit_parse_for_template (yychar, d1, d2) + int yychar; + tree d1, d2; +{ + struct template_info *template_info; + extern struct obstack inline_text_obstack; /* see comment in cp-lex.c */ + + if (d2 == NULL_TREE || d2 == error_mark_node) + { + lose: + /* @@ Should use temp obstack, and discard results. */ + reinit_parse_for_block (yychar, &inline_text_obstack, 1); + return; + } + + if (TREE_CODE (d2) == IDENTIFIER_NODE) + d2 = IDENTIFIER_GLOBAL_VALUE (d2); + if (!d2) + goto lose; + template_info = DECL_TEMPLATE_INFO (d2); + if (!template_info) + { + template_info = (struct template_info *) permalloc (sizeof (struct template_info)); + bzero (template_info, sizeof (struct template_info)); + DECL_TEMPLATE_INFO (d2) = template_info; + } + template_info->filename = input_filename; + template_info->lineno = lineno; + reinit_parse_for_block (yychar, &inline_text_obstack, 1); + template_info->text = obstack_base (&inline_text_obstack); + template_info->length = obstack_object_size (&inline_text_obstack); + obstack_finish (&inline_text_obstack); + template_info->parm_vec = d1; +} + +/* Type unification. + + We have a function template signature with one or more references to + template parameters, and a parameter list we wish to fit to this + template. If possible, produce a list of parameters for the template + which will cause it to fit the supplied parameter list. + + Return zero for success, 2 for an incomplete match that doesn't resolve + all the types, and 1 for complete failure. An error message will be + printed only for an incomplete match. + + TPARMS[NTPARMS] is an array of template parameter types; + TARGS[NTPARMS] is the array of template parameter values. PARMS is + the function template's signature (using TEMPLATE_PARM_IDX nodes), + and ARGS is the argument list we're trying to match against it. + + If SUBR is 1, we're being called recursively (to unify the arguments of + a function or method parameter of a function template), so don't zero + out targs and don't fail on an incomplete match. */ + +int +type_unification (tparms, targs, parms, args, nsubsts, subr) + tree tparms, *targs, parms, args; + int *nsubsts, subr; +{ + tree parm, arg; + int i; + int ntparms = TREE_VEC_LENGTH (tparms); + + my_friendly_assert (TREE_CODE (tparms) == TREE_VEC, 289); + my_friendly_assert (TREE_CODE (parms) == TREE_LIST, 290); + /* ARGS could be NULL (via a call from cp-parse.y to + build_x_function_call). */ + if (args) + my_friendly_assert (TREE_CODE (args) == TREE_LIST, 291); + my_friendly_assert (ntparms > 0, 292); + + if (!subr) + bzero (targs, sizeof (tree) * ntparms); + + while (parms + && parms != void_list_node + && args + && args != void_list_node) + { + parm = TREE_VALUE (parms); + parms = TREE_CHAIN (parms); + arg = TREE_VALUE (args); + args = TREE_CHAIN (args); + + if (arg == error_mark_node) + return 1; + if (arg == unknown_type_node) + return 1; +#if 0 + if (TREE_CODE (arg) == VAR_DECL) + arg = TREE_TYPE (arg); + else if (TREE_CODE_CLASS (TREE_CODE (arg)) == 'e') + arg = TREE_TYPE (arg); +#else + if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't') + { + my_friendly_assert (TREE_TYPE (arg) != NULL_TREE, 293); + arg = TREE_TYPE (arg); + } +#endif + if (TREE_CODE (arg) == FUNCTION_TYPE + || TREE_CODE (arg) == METHOD_TYPE) + arg = build_pointer_type (arg); + + switch (unify (tparms, targs, ntparms, parm, arg, nsubsts)) + { + case 0: + break; + case 1: + return 1; + } + } + /* Fail if we've reached the end of the parm list, and more args + are present, and the parm list isn't variadic. */ + if (args && args != void_list_node && parms == void_list_node) + return 1; + /* Fail if parms are left and they don't have default values. */ + if (parms + && parms != void_list_node + && TREE_PURPOSE (parms) == NULL_TREE) + return 1; + if (!subr) + for (i = 0; i < ntparms; i++) + if (!targs[i]) + { + error ("incomplete type unification"); + return 2; + } + return 0; +} + +/* Tail recursion is your friend. */ +static int +unify (tparms, targs, ntparms, parm, arg, nsubsts) + tree tparms, *targs, parm, arg; + int *nsubsts, ntparms; +{ + int idx; + + /* I don't think this will do the right thing with respect to types. + But the only case I've seen it in so far has been array bounds, where + signedness is the only information lost, and I think that will be + okay. */ + while (TREE_CODE (parm) == NOP_EXPR) + parm = TREE_OPERAND (parm, 0); + + if (arg == error_mark_node) + return 1; + if (arg == unknown_type_node) + return 1; + if (arg == parm) + return 0; + + if (TREE_CODE (arg) == REFERENCE_TYPE) + arg = TREE_TYPE (arg); + + switch (TREE_CODE (parm)) + { + case TEMPLATE_TYPE_PARM: + (*nsubsts)++; + if (TEMPLATE_TYPE_TPARMLIST (parm) != tparms) + { + error ("mixed template headers?!"); + my_friendly_abort (86); + return 1; + } + idx = TEMPLATE_TYPE_IDX (parm); + /* Simple cases: Value already set, does match or doesn't. */ + if (targs[idx] == arg) + return 0; + else if (targs[idx]) + return 1; + /* Check for mixed types and values. */ + if (TREE_CODE (TREE_VEC_ELT (tparms, idx)) != IDENTIFIER_NODE) + return 1; + targs[idx] = arg; + return 0; + case TEMPLATE_CONST_PARM: + (*nsubsts)++; + idx = TEMPLATE_CONST_IDX (parm); + if (targs[idx] == arg) + return 0; + else if (targs[idx]) + { + my_friendly_abort (87); + return 1; + } +/* else if (typeof arg != tparms[idx]) + return 1;*/ + + targs[idx] = copy_to_permanent (arg); + return 0; + + case POINTER_TYPE: + if (TREE_CODE (arg) != POINTER_TYPE) + return 1; + return unify (tparms, targs, ntparms, TREE_TYPE (parm), TREE_TYPE (arg), + nsubsts); + + case REFERENCE_TYPE: + return unify (tparms, targs, ntparms, TREE_TYPE (parm), arg, nsubsts); + + case ARRAY_TYPE: + if (TREE_CODE (arg) != ARRAY_TYPE) + return 1; + if (unify (tparms, targs, ntparms, TYPE_DOMAIN (parm), TYPE_DOMAIN (arg), + nsubsts) != 0) + return 1; + return unify (tparms, targs, ntparms, TREE_TYPE (parm), TREE_TYPE (arg), + nsubsts); + + case REAL_TYPE: + case INTEGER_TYPE: + if (TREE_CODE (parm) == INTEGER_TYPE && TREE_CODE (arg) == INTEGER_TYPE) + { + if (TYPE_MIN_VALUE (parm) && TYPE_MIN_VALUE (arg) + && unify (tparms, targs, ntparms, + TYPE_MIN_VALUE (parm), TYPE_MIN_VALUE (arg), nsubsts)) + return 1; + if (TYPE_MAX_VALUE (parm) && TYPE_MAX_VALUE (arg) + && unify (tparms, targs, ntparms, + TYPE_MAX_VALUE (parm), TYPE_MAX_VALUE (arg), nsubsts)) + return 1; + } + /* As far as unification is concerned, this wins. Later checks + will invalidate it if necessary. */ + return 0; + + /* Types INTEGER_CST and MINUS_EXPR can come from array bounds. */ + case INTEGER_CST: + if (TREE_CODE (arg) != INTEGER_CST) + return 1; + return !tree_int_cst_equal (parm, arg); + + case MINUS_EXPR: + { + tree t1, t2; + t1 = TREE_OPERAND (parm, 0); + t2 = TREE_OPERAND (parm, 1); + if (TREE_CODE (t1) != TEMPLATE_CONST_PARM) + return 1; + return unify (tparms, targs, ntparms, t1, + fold (build (PLUS_EXPR, integer_type_node, arg, t2)), + nsubsts); + } + + case TREE_VEC: + { + int i; + if (TREE_CODE (arg) != TREE_VEC) + return 1; + if (TREE_VEC_LENGTH (parm) != TREE_VEC_LENGTH (arg)) + return 1; + for (i = TREE_VEC_LENGTH (parm) - 1; i >= 0; i--) + if (unify (tparms, targs, ntparms, + TREE_VEC_ELT (parm, i), TREE_VEC_ELT (arg, i), + nsubsts)) + return 1; + return 0; + } + + case UNINSTANTIATED_P_TYPE: + { + tree a; + /* Unification of something that is not a template fails. (mrs) */ + if (TYPE_NAME (arg) == 0) + return 1; + a = IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (arg)); + /* Unification of something that is not a template fails. (mrs) */ + if (a == 0) + return 1; + if (UPT_TEMPLATE (parm) != TREE_PURPOSE (a)) + /* different templates */ + return 1; + return unify (tparms, targs, ntparms, UPT_PARMS (parm), TREE_VALUE (a), + nsubsts); + } + + case RECORD_TYPE: + if (TYPE_PTRMEMFUNC_P (parm)) + return unify (tparms, targs, ntparms, TYPE_PTRMEMFUNC_FN_TYPE (parm), + arg, nsubsts); + + /* Unification of something that is not a template fails. (mrs) */ + return 1; + + case METHOD_TYPE: + if (TREE_CODE (arg) != METHOD_TYPE) + return 1; + goto check_args; + + case FUNCTION_TYPE: + if (TREE_CODE (arg) != FUNCTION_TYPE) + return 1; + check_args: + return type_unification (tparms, targs, TYPE_ARG_TYPES (parm), + TYPE_ARG_TYPES (arg), nsubsts, 1); + + default: + sorry ("use of `%s' in template type unification", + tree_code_name [(int) TREE_CODE (parm)]); + return 1; + } +} + + +#undef DEBUG + +int +do_pending_expansions () +{ + struct pending_inline *i, *new_list = 0; + + if (!pending_template_expansions) + return 0; + +#ifdef DEBUG + fprintf (stderr, "\n\n\t\t IN DO_PENDING_EXPANSIONS\n\n"); +#endif + + i = pending_template_expansions; + while (i) + { + tree context; + + struct pending_inline *next = i->next; + tree t = i->fndecl; + + int decision = 0; +#define DECIDE(N) if(1){decision=(N); goto decided;}else + + my_friendly_assert (TREE_CODE (t) == FUNCTION_DECL + || TREE_CODE (t) == VAR_DECL, 294); + if (TREE_ASM_WRITTEN (t)) + DECIDE (0); + /* If it's a method, let the class type decide it. + @@ What if the method template is in a separate file? + Maybe both file contexts should be taken into account? + Maybe only do this if i->interface == 1 (unknown)? */ + context = DECL_CONTEXT (t); + if (context != NULL_TREE + && TREE_CODE_CLASS (TREE_CODE (context)) == 't') + { + /* I'm interested in the context of this version of the function, + not the original virtual declaration. */ + context = DECL_CLASS_CONTEXT (t); + + /* If `unknown', we might want a static copy. + If `implementation', we want a global one. + If `interface', ext ref. */ + if (CLASSTYPE_INTERFACE_KNOWN (context)) + DECIDE (!CLASSTYPE_INTERFACE_ONLY (context)); +#if 0 /* This doesn't get us stuff needed only by the file initializer. */ + DECIDE (TREE_USED (t)); +#else /* This compiles too much stuff, but that's probably better in + most cases than never compiling the stuff we need. */ + DECIDE (1); +#endif + } + + if (i->interface == 1) + DECIDE (TREE_USED (t)); + else + DECIDE (i->interface); + + decided: +#ifdef DEBUG + print_node_brief (stderr, decision ? "yes: " : "no: ", t, 0); + fprintf (stderr, "\t%s\n", + (DECL_ASSEMBLER_NAME (t) + ? IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (t)) + : "")); +#endif + if (decision) + { + i->next = pending_inlines; + pending_inlines = i; + } + else + { + i->next = new_list; + new_list = i; + } + i = next; + } + pending_template_expansions = new_list; + if (!pending_inlines) + return 0; + do_pending_inlines (); + return 1; +} + + +struct pending_template { + struct pending_template *next; + tree id; +}; + +static struct pending_template* pending_templates; + +void +do_pending_templates () +{ + struct pending_template* t; + + for ( t = pending_templates; t; t = t->next) + { + instantiate_class_template (t->id, 1); + } + + for ( t = pending_templates; t; t = pending_templates) + { + pending_templates = t->next; + free(t); + } +} + +static void +add_pending_template (pt) + tree pt; +{ + struct pending_template *p; + + p = (struct pending_template *) malloc (sizeof (struct pending_template)); + p->next = pending_templates; + pending_templates = p; + p->id = pt; +} + +/* called from the parser. */ +void +do_function_instantiation (declspecs, declarator) + tree declspecs, declarator; +{ + tree decl = grokdeclarator (declarator, declspecs, NORMAL, 0, 0); + tree name = DECL_NAME (decl); + tree fn = IDENTIFIER_GLOBAL_VALUE (name); + tree result = NULL_TREE; + if (fn) + { + for (fn = get_first_fn (fn); fn; fn = DECL_CHAIN (fn)) + if (TREE_CODE (fn) == TEMPLATE_DECL) + { + int ntparms = TREE_VEC_LENGTH (DECL_TEMPLATE_PARMS (fn)); + tree *targs = (tree *) malloc (sizeof (tree) * ntparms); + int i, dummy; + i = type_unification (DECL_TEMPLATE_PARMS (fn), targs, + TYPE_ARG_TYPES (TREE_TYPE (fn)), + TYPE_ARG_TYPES (TREE_TYPE (decl)), + &dummy, 0); + if (i == 0) + { + if (result) + cp_error ("ambiguous template instantiation for `%D' requested", decl); + else + result = instantiate_template (fn, targs); + } + } + } + if (!result) + cp_error ("no matching template for `%D' found", decl); +} diff --git a/gcc/cp/ptree.c b/gcc/cp/ptree.c new file mode 100644 index 0000000..a259cbe --- /dev/null +++ b/gcc/cp/ptree.c @@ -0,0 +1,163 @@ +/* Prints out trees in human readable form. + Copyright (C) 1992, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#include "config.h" +#include "tree.h" +#include <stdio.h> +#include "cp-tree.h" + +void +print_lang_decl (file, node, indent) + FILE *file; + tree node; + int indent; +{ + if (!DECL_LANG_SPECIFIC (node)) + return; + /* A FIELD_DECL only has the flags structure, which we aren't displaying + anyways. */ + if (DECL_MUTABLE_P (node)) + { + indent_to (file, indent + 3); + fprintf (file, " mutable "); + } + if (TREE_CODE (node) == FIELD_DECL) + return; + indent_to (file, indent + 3); + if (DECL_MAIN_VARIANT (node)) + { + fprintf (file, " decl-main-variant "); + fprintf (file, HOST_PTR_PRINTF, DECL_MAIN_VARIANT (node)); + } + if (DECL_PENDING_INLINE_INFO (node)) + { + fprintf (file, " pending-inline-info "); + fprintf (file, HOST_PTR_PRINTF, DECL_PENDING_INLINE_INFO (node)); + } + if (DECL_TEMPLATE_INFO (node)) + { + fprintf (file, " template-info "); + fprintf (file, HOST_PTR_PRINTF, DECL_TEMPLATE_INFO (node)); + } +} + +void +print_lang_type (file, node, indent) + FILE *file; + register tree node; + int indent; +{ + if (TREE_CODE (node) == TEMPLATE_TYPE_PARM) + { + print_node (file, "tinfo", TYPE_VALUES (node), indent + 4); + return; + } + + if (TREE_CODE (node) == UNINSTANTIATED_P_TYPE) + { + print_node (file, "template", UPT_TEMPLATE (node), indent + 4); + print_node (file, "parameters", UPT_PARMS (node), indent + 4); + return; + } + + if (! (TREE_CODE (node) == RECORD_TYPE + || TREE_CODE (node) == UNION_TYPE)) + return; + + if (!TYPE_LANG_SPECIFIC (node)) + return; + + indent_to (file, indent + 3); + + if (TYPE_NEEDS_CONSTRUCTING (node)) + fputs ( "needs-constructor", file); + if (TYPE_NEEDS_DESTRUCTOR (node)) + fputs (" needs-destructor", file); + if (TYPE_HAS_DESTRUCTOR (node)) + fputs (" ~X()", file); + if (TYPE_HAS_DEFAULT_CONSTRUCTOR (node)) + fputs (" X()", file); + if (TYPE_HAS_CONVERSION (node)) + fputs (" has-type-conversion", file); + if (TYPE_HAS_INT_CONVERSION (node)) + fputs (" has-int-conversion", file); + if (TYPE_HAS_REAL_CONVERSION (node)) + fputs (" has-float-conversion", file); + if (TYPE_HAS_INIT_REF (node)) + { + if (TYPE_HAS_CONST_INIT_REF (node)) + fputs (" X(constX&)", file); + else + fputs (" X(X&)", file); + } + if (TREE_GETS_NEW (node)) + fputs (" gets-new", file); + if (TREE_GETS_DELETE (node)) + fputs (" gets-delete", file); + if (TYPE_HAS_ASSIGNMENT (node)) + fputs (" has=", file); + if (TYPE_HAS_ASSIGN_REF (node)) + fputs (" this=(X&)", file); + if (TYPE_OVERLOADS_METHOD_CALL_EXPR (node)) + fputs (" op->()", file); + if (TYPE_GETS_INIT_AGGR (node)) + fputs (" gets X(X, ...)", file); + if (TYPE_OVERLOADS_CALL_EXPR (node)) + fputs (" op()", file); + if (TYPE_OVERLOADS_ARRAY_REF (node)) + fputs (" op[]", file); + if (TYPE_OVERLOADS_ARROW (node)) + fputs (" op->", file); + if (TYPE_USES_MULTIPLE_INHERITANCE (node)) + fputs (" uses-multiple-inheritance", file); + + if (TREE_CODE (node) == RECORD_TYPE) + { + fprintf (file, " n_parents %d n_ancestors %d", + CLASSTYPE_N_BASECLASSES (node), + CLASSTYPE_N_SUPERCLASSES (node)); + fprintf (file, " use_template=%d", CLASSTYPE_USE_TEMPLATE (node)); + if (CLASSTYPE_INTERFACE_ONLY (node)) + fprintf (file, " interface-only"); + if (CLASSTYPE_INTERFACE_UNKNOWN (node)) + fprintf (file, " interface-unknown"); + print_node (file, "member-functions", CLASSTYPE_METHOD_VEC (node), + indent + 4); + print_node (file, "baselinks", + TYPE_BINFO_BASETYPES (node) ? CLASSTYPE_BASELINK_VEC (node) : NULL_TREE, + indent + 4); + } +} + +void +print_lang_identifier (file, node, indent) + FILE *file; + tree node; + int indent; +{ + print_node (file, "global", IDENTIFIER_GLOBAL_VALUE (node), indent + 4); + print_node (file, "class", IDENTIFIER_CLASS_VALUE (node), indent + 4); + print_node (file, "local", IDENTIFIER_LOCAL_VALUE (node), indent + 4); + print_node (file, "label", IDENTIFIER_LABEL_VALUE (node), indent + 4); + print_node (file, "template", IDENTIFIER_TEMPLATE (node), indent + 4); + print_node (file, "implicit", IDENTIFIER_IMPLICIT_DECL (node), indent + 4); + print_node (file, "error locus", IDENTIFIER_ERROR_LOCUS (node), indent + 4); +} diff --git a/gcc/cp/search.c b/gcc/cp/search.c new file mode 100644 index 0000000..3619663 --- /dev/null +++ b/gcc/cp/search.c @@ -0,0 +1,3308 @@ +/* Breadth-first and depth-first routines for + searching multiple-inheritance lattice for GNU C++. + Copyright (C) 1987, 1989, 1992, 1993 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* High-level class interface. */ + +#include "config.h" +#include "tree.h" +#include <stdio.h> +#include "cp-tree.h" +#include "obstack.h" +#include "flags.h" + +#define obstack_chunk_alloc xmalloc +#define obstack_chunk_free free + +void init_search (); +extern struct obstack *current_obstack; + +#include "stack.h" + +/* Obstack used for remembering decision points of breadth-first. */ +static struct obstack search_obstack; + +/* Methods for pushing and popping objects to and from obstacks. */ +struct stack_level * +push_stack_level (obstack, tp, size) + struct obstack *obstack; + char *tp; /* Sony NewsOS 5.0 compiler doesn't like void * here. */ + int size; +{ + struct stack_level *stack; + obstack_grow (obstack, tp, size); + stack = (struct stack_level *) ((char*)obstack_next_free (obstack) - size); + obstack_finish (obstack); + stack->obstack = obstack; + stack->first = (tree *) obstack_base (obstack); + stack->limit = obstack_room (obstack) / sizeof (tree *); + return stack; +} + +struct stack_level * +pop_stack_level (stack) + struct stack_level *stack; +{ + struct stack_level *tem = stack; + struct obstack *obstack = tem->obstack; + stack = tem->prev; + obstack_free (obstack, tem); + return stack; +} + +#define search_level stack_level +static struct search_level *search_stack; + +static tree lookup_field_1 (); +static int lookup_fnfields_1 (); +static void dfs_walk (); +static int markedp (); +static void dfs_unmark (); +static void dfs_init_vbase_pointers (); + +static tree vbase_types; +static tree vbase_decl, vbase_decl_ptr; +static tree vbase_decl_ptr_intermediate; +static tree vbase_init_result; + +/* Allocate a level of searching. */ +static struct search_level * +push_search_level (stack, obstack) + struct stack_level *stack; + struct obstack *obstack; +{ + struct search_level tem; + + tem.prev = stack; + return push_stack_level (obstack, (char *)&tem, sizeof (tem)); +} + +/* Discard a level of search allocation. */ +static struct search_level * +pop_search_level (obstack) + struct stack_level *obstack; +{ + register struct search_level *stack = pop_stack_level (obstack); + + return stack; +} + +/* Search memoization. */ +struct type_level +{ + struct stack_level base; + + /* First object allocated in obstack of entries. */ + char *entries; + + /* Number of types memoized in this context. */ + int len; + + /* Type being memoized; save this if we are saving + memoized contexts. */ + tree type; +}; + +/* Obstack used for memoizing member and member function lookup. */ + +static struct obstack type_obstack, type_obstack_entries; +static struct type_level *type_stack; +static tree _vptr_name; + +/* Make things that look like tree nodes, but allocate them + on type_obstack_entries. */ +static int my_tree_node_counter; +static tree my_tree_cons (), my_build_string (); + +extern int flag_memoize_lookups, flag_save_memoized_contexts; + +/* Variables for gathering statistics. */ +static int my_memoized_entry_counter; +static int memoized_fast_finds[2], memoized_adds[2], memoized_fast_rejects[2]; +static int memoized_fields_searched[2]; +static int n_fields_searched; +static int n_calls_lookup_field, n_calls_lookup_field_1; +static int n_calls_lookup_fnfields, n_calls_lookup_fnfields_1; +static int n_calls_get_base_type; +static int n_outer_fields_searched; +static int n_contexts_saved; + +/* Local variables to help save memoization contexts. */ +static tree prev_type_memoized; +static struct type_level *prev_type_stack; + +/* This list is used by push_class_decls to know what decls need to + be pushed into class scope. */ +static tree closed_envelopes = NULL_TREE; + +/* Allocate a level of type memoization context. */ +static struct type_level * +push_type_level (stack, obstack) + struct stack_level *stack; + struct obstack *obstack; +{ + struct type_level tem; + + tem.base.prev = stack; + + obstack_finish (&type_obstack_entries); + tem.entries = (char *) obstack_base (&type_obstack_entries); + tem.len = 0; + tem.type = NULL_TREE; + + return (struct type_level *)push_stack_level (obstack, (char *)&tem, sizeof (tem)); +} + +/* Discard a level of type memoization context. */ + +static struct type_level * +pop_type_level (stack) + struct type_level *stack; +{ + obstack_free (&type_obstack_entries, stack->entries); + return (struct type_level *)pop_stack_level ((struct stack_level *)stack); +} + +/* Make something that looks like a TREE_LIST, but + do it on the type_obstack_entries obstack. */ +static tree +my_tree_cons (purpose, value, chain) + tree purpose, value, chain; +{ + tree p = (tree)obstack_alloc (&type_obstack_entries, sizeof (struct tree_list)); + ++my_tree_node_counter; + TREE_TYPE (p) = NULL_TREE; + ((HOST_WIDE_INT *)p)[3] = 0; + TREE_SET_CODE (p, TREE_LIST); + TREE_PURPOSE (p) = purpose; + TREE_VALUE (p) = value; + TREE_CHAIN (p) = chain; + return p; +} + +static tree +my_build_string (str) + char *str; +{ + tree p = (tree)obstack_alloc (&type_obstack_entries, sizeof (struct tree_string)); + ++my_tree_node_counter; + TREE_TYPE (p) = 0; + ((int *)p)[3] = 0; + TREE_SET_CODE (p, STRING_CST); + TREE_STRING_POINTER (p) = str; + TREE_STRING_LENGTH (p) = strlen (str); + return p; +} + +/* Memoizing machinery to make searches for multiple inheritance + reasonably efficient. */ +#define MEMOIZE_HASHSIZE 8 +typedef struct memoized_entry +{ + struct memoized_entry *chain; + int uid; + tree data_members[MEMOIZE_HASHSIZE]; + tree function_members[MEMOIZE_HASHSIZE]; +} *ME; + +#define MEMOIZED_CHAIN(ENTRY) (((ME)ENTRY)->chain) +#define MEMOIZED_UID(ENTRY) (((ME)ENTRY)->uid) +#define MEMOIZED_FIELDS(ENTRY,INDEX) (((ME)ENTRY)->data_members[INDEX]) +#define MEMOIZED_FNFIELDS(ENTRY,INDEX) (((ME)ENTRY)->function_members[INDEX]) +/* The following is probably a lousy hash function. */ +#define MEMOIZED_HASH_FN(NODE) (((long)(NODE)>>4)&(MEMOIZE_HASHSIZE - 1)) + +static struct memoized_entry * +my_new_memoized_entry (chain) + struct memoized_entry *chain; +{ + struct memoized_entry *p = + (struct memoized_entry *)obstack_alloc (&type_obstack_entries, + sizeof (struct memoized_entry)); + bzero (p, sizeof (struct memoized_entry)); + MEMOIZED_CHAIN (p) = chain; + MEMOIZED_UID (p) = ++my_memoized_entry_counter; + return p; +} + +/* Make an entry in the memoized table for type TYPE + that the entry for NAME is FIELD. */ + +tree +make_memoized_table_entry (type, name, function_p) + tree type, name; + int function_p; +{ + int index = MEMOIZED_HASH_FN (name); + tree entry, *prev_entry; + + memoized_adds[function_p] += 1; + if (CLASSTYPE_MTABLE_ENTRY (type) == 0) + { + obstack_ptr_grow (&type_obstack, type); + obstack_blank (&type_obstack, sizeof (struct memoized_entry *)); + CLASSTYPE_MTABLE_ENTRY (type) = (char *)my_new_memoized_entry ((struct memoized_entry *)0); + type_stack->len++; + if (type_stack->len * 2 >= type_stack->base.limit) + my_friendly_abort (88); + } + if (function_p) + prev_entry = &MEMOIZED_FNFIELDS (CLASSTYPE_MTABLE_ENTRY (type), index); + else + prev_entry = &MEMOIZED_FIELDS (CLASSTYPE_MTABLE_ENTRY (type), index); + + entry = my_tree_cons (name, NULL_TREE, *prev_entry); + *prev_entry = entry; + + /* Don't know the error message to give yet. */ + TREE_TYPE (entry) = error_mark_node; + + return entry; +} + +/* When a new function or class context is entered, we build + a table of types which have been searched for members. + The table is an array (obstack) of types. When a type is + entered into the obstack, its CLASSTYPE_MTABLE_ENTRY + field is set to point to a new record, of type struct memoized_entry. + + A non-NULL TREE_TYPE of the entry contains an access control error message. + + The slots for the data members are arrays of tree nodes. + These tree nodes are lists, with the TREE_PURPOSE + of this list the known member name, and the TREE_VALUE + as the FIELD_DECL for the member. + + For member functions, the TREE_PURPOSE is again the + name of the member functions for that class, + and the TREE_VALUE of the list is a pairs + whose TREE_PURPOSE is a member functions of this name, + and whose TREE_VALUE is a list of known argument lists this + member function has been called with. The TREE_TYPE of the pair, + if non-NULL, is an error message to print. */ + +/* Tell search machinery that we are entering a new context, and + to update tables appropriately. + + TYPE is the type of the context we are entering, which can + be NULL_TREE if we are not in a class's scope. + + USE_OLD, if nonzero tries to use previous context. */ +void +push_memoized_context (type, use_old) + tree type; + int use_old; +{ + int len; + tree *tem; + + if (prev_type_stack) + { + if (use_old && prev_type_memoized == type) + { +#ifdef GATHER_STATISTICS + n_contexts_saved++; +#endif + type_stack = prev_type_stack; + prev_type_stack = 0; + + tem = &type_stack->base.first[0]; + len = type_stack->len; + while (len--) + CLASSTYPE_MTABLE_ENTRY (tem[len*2]) = (char *)tem[len*2+1]; + return; + } + /* Otherwise, need to pop old stack here. */ + type_stack = pop_type_level (prev_type_stack); + prev_type_memoized = 0; + prev_type_stack = 0; + } + + type_stack = push_type_level ((struct stack_level *)type_stack, + &type_obstack); + type_stack->type = type; +} + +/* Tell search machinery that we have left a context. + We do not currently save these contexts for later use. + If we wanted to, we could not use pop_search_level, since + poping that level allows the data we have collected to + be clobbered; a stack of obstacks would be needed. */ +void +pop_memoized_context (use_old) + int use_old; +{ + int len; + tree *tem = &type_stack->base.first[0]; + + if (! flag_save_memoized_contexts) + use_old = 0; + else if (use_old) + { + len = type_stack->len; + while (len--) + tem[len*2+1] = (tree)CLASSTYPE_MTABLE_ENTRY (tem[len*2]); + + prev_type_stack = type_stack; + prev_type_memoized = type_stack->type; + } + + if (flag_memoize_lookups) + { + len = type_stack->len; + while (len--) + CLASSTYPE_MTABLE_ENTRY (tem[len*2]) + = (char *)MEMOIZED_CHAIN (CLASSTYPE_MTABLE_ENTRY (tem[len*2])); + } + if (! use_old) + type_stack = pop_type_level (type_stack); + else + type_stack = (struct type_level *)type_stack->base.prev; +} + +/* This is the newer recursive depth first search routine. */ +/* Return non-zero if PARENT is directly derived from TYPE. By directly + we mean it's only one step up the inheritance lattice. We check this + by walking horizontally across the types that TYPE directly inherits + from, to see if PARENT is among them. This is used by get_binfo and + by compute_access. */ +static int +immediately_derived (parent, type) + tree parent, type; +{ + if (TYPE_BINFO (type)) + { + tree binfos = BINFO_BASETYPES (TYPE_BINFO (type)); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if (parent == BINFO_TYPE (base_binfo)) + return 1; + } + } + return 0; +} + +/* Check whether the type given in BINFO is derived from PARENT. If + it isn't, return 0. If it is, but the derivation is MI-ambiguous + AND protect != 0, emit an error message and return error_mark_node. + + Otherwise, if TYPE is derived from PARENT, return the actual base + information, unless a one of the protection violations below + occurs, in which case emit an error message and return error_mark_node. + + If PROTECT is 1, then check if access to a public field of PARENT + would be private. Also check for ambiguity. */ + +tree +get_binfo (parent, binfo, protect) + register tree parent, binfo; + int protect; +{ + tree type; + int dist; + tree rval = NULL_TREE; + + if (TREE_CODE (parent) == TREE_VEC) + parent = BINFO_TYPE (parent); + /* unions cannot participate in inheritance relationships */ + else if (TREE_CODE (parent) == UNION_TYPE) + return NULL_TREE; + else if (TREE_CODE (parent) != RECORD_TYPE) + my_friendly_abort (89); + + if (TREE_CODE (binfo) == TREE_VEC) + type = BINFO_TYPE (binfo); + else if (TREE_CODE (binfo) == RECORD_TYPE) + type = binfo; + else + my_friendly_abort (90); + + dist = get_base_distance (parent, binfo, protect, &rval); + + if (dist == -3) + { + cp_error ("fields of `%T' are inaccessible in `%T' due to private inheritance", + parent, type); + return error_mark_node; + } + else if (dist == -2 && protect) + { + cp_error ("type `%T' is ambiguous base class for type `%T'", parent, + type); + return error_mark_node; + } + + return rval; +} + +/* This is the newer depth first get_base_distance routine. */ +static +get_base_distance_recursive (binfo, depth, is_private, basetype_path, rval, + rval_private_ptr, new_binfo_ptr, parent, path_ptr, + protect, via_virtual_ptr, via_virtual) + tree binfo, basetype_path, *new_binfo_ptr, parent, *path_ptr; + int *rval_private_ptr, depth, is_private, rval, protect, *via_virtual_ptr, + via_virtual; +{ + tree binfos; + int i, n_baselinks; + + if (BINFO_TYPE (binfo) == parent || binfo == parent) + { + if (rval == -1) + { + rval = depth; + *rval_private_ptr = is_private; + *new_binfo_ptr = binfo; + *via_virtual_ptr = via_virtual; + } + else + { + int same_object = tree_int_cst_equal (BINFO_OFFSET (*new_binfo_ptr), + BINFO_OFFSET (binfo)); + + if (*via_virtual_ptr && via_virtual==0) + { + *rval_private_ptr = is_private; + *new_binfo_ptr = binfo; + *via_virtual_ptr = via_virtual; + } + else if (same_object) + { + if (*rval_private_ptr && ! is_private) + { + *rval_private_ptr = is_private; + *new_binfo_ptr = binfo; + *via_virtual_ptr = via_virtual; + } + return rval; + } + + rval = -2; + } + return rval; + } + + binfos = BINFO_BASETYPES (binfo); + n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + depth += 1; + + /* Process base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + /* Find any specific instance of a virtual base, when searching with + a binfo... */ + if (BINFO_MARKED (base_binfo) == 0 || TREE_CODE (parent) == TREE_VEC) + { + int via_private + = (protect + && (is_private + || (!TREE_VIA_PUBLIC (base_binfo) + && !is_friend (BINFO_TYPE (binfo), current_scope ())))); + int this_virtual = via_virtual || TREE_VIA_VIRTUAL (base_binfo); + int was; + + /* When searching for a non-virtual, we cannot mark + virtually found binfos. */ + if (! this_virtual) + SET_BINFO_MARKED (base_binfo); + +#define WATCH_VALUES(rval, via_private) (rval == -1 ? 3 : via_private) + + was = WATCH_VALUES (rval, *via_virtual_ptr); + rval = get_base_distance_recursive (base_binfo, depth, via_private, + binfo, rval, rval_private_ptr, + new_binfo_ptr, parent, path_ptr, + protect, via_virtual_ptr, + this_virtual); + /* watch for updates; only update if path is good. */ + if (path_ptr && WATCH_VALUES (rval, *via_virtual_ptr) != was) + BINFO_INHERITANCE_CHAIN (base_binfo) = binfo; + if (rval == -2 && *via_virtual_ptr == 0) + return rval; + +#undef WATCH_VALUES + + } + } + + return rval; +} + +/* Return the number of levels between type PARENT and the type given + in BINFO, following the leftmost path to PARENT not found along a + virtual path, if there are no real PARENTs (all come from virtual + base classes), then follow the leftmost path to PARENT. + + Return -1 if TYPE is not derived from PARENT. + Return -2 if PARENT is an ambiguous base class of TYPE, and PROTECT is + non-negative. + Return -3 if PARENT is private to TYPE, and PROTECT is non-zero. + + If PATH_PTR is non-NULL, then also build the list of types + from PARENT to TYPE, with TREE_VIA_VIRUAL and TREE_VIA_PUBLIC + set. + + PARENT can also be a binfo, in which case that exact parent is found + and no other. convert_pointer_to_real uses this functionality. + + If BINFO is a binfo, its BINFO_INHERITANCE_CHAIN will be left alone. + + Code in prepare_fresh_vtable relies upon the path being built even + when -2 is returned. */ + +int +get_base_distance (parent, binfo, protect, path_ptr) + register tree parent, binfo; + int protect; + tree *path_ptr; +{ + int head, tail; + int is_private = 0; + int rval; + int depth = 0; + int rval_private = 0; + tree type; + tree new_binfo = NULL_TREE; + int via_virtual; + int watch_access = protect; + + if (TREE_CODE (parent) != TREE_VEC) + parent = TYPE_MAIN_VARIANT (parent); + + if (TREE_CODE (binfo) == TREE_VEC) + type = BINFO_TYPE (binfo); + else if (TREE_CODE (binfo) == RECORD_TYPE) + { + type = binfo; + binfo = TYPE_BINFO (type); + + if (path_ptr) + BINFO_INHERITANCE_CHAIN (binfo) = NULL_TREE; + } + else + my_friendly_abort (92); + + if (parent == type || parent == binfo) + { + /* If the distance is 0, then we don't really need + a path pointer, but we shouldn't let garbage go back. */ + if (path_ptr) + *path_ptr = binfo; + return 0; + } + + if (path_ptr) + watch_access = 1; + + rval = get_base_distance_recursive (binfo, 0, 0, NULL_TREE, -1, + &rval_private, &new_binfo, parent, + path_ptr, watch_access, &via_virtual, 0); + + dfs_walk (binfo, dfs_unmark, markedp); + + /* Access restrictions don't count if we found an ambiguous basetype. */ + if (rval == -2 && protect >= 0) + rval_private = 0; + + if (rval && protect && rval_private) + return -3; + + if (path_ptr) + *path_ptr = new_binfo; + return rval; +} + +/* Search for a member with name NAME in a multiple inheritance lattice + specified by TYPE. If it does not exist, return NULL_TREE. + If the member is ambiguously referenced, return `error_mark_node'. + Otherwise, return the FIELD_DECL. */ + +/* Do a 1-level search for NAME as a member of TYPE. The caller must + figure out whether it can access this field. (Since it is only one + level, this is reasonable.) */ +static tree +lookup_field_1 (type, name) + tree type, name; +{ + register tree field = TYPE_FIELDS (type); + +#ifdef GATHER_STATISTICS + n_calls_lookup_field_1++; +#endif + while (field) + { +#ifdef GATHER_STATISTICS + n_fields_searched++; +#endif + if (DECL_NAME (field) == NULL_TREE + && TREE_CODE (TREE_TYPE (field)) == UNION_TYPE) + { + tree temp = lookup_field_1 (TREE_TYPE (field), name); + if (temp) + return temp; + } + if (DECL_NAME (field) == name) + { + if ((TREE_CODE(field) == VAR_DECL || TREE_CODE(field) == CONST_DECL) + && DECL_ASSEMBLER_NAME (field) != NULL) + GNU_xref_ref(current_function_decl, + IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (field))); + return field; + } + field = TREE_CHAIN (field); + } + /* Not found. */ + if (name == _vptr_name) + { + /* Give the user what s/he thinks s/he wants. */ + if (TYPE_VIRTUAL_P (type)) + return CLASSTYPE_VFIELD (type); + } + return NULL_TREE; +} + +tree +current_scope () +{ + if (current_function_decl == NULL_TREE) + return current_class_type; + if (current_class_type == NULL_TREE) + return current_function_decl; + if (DECL_CLASS_CONTEXT (current_function_decl) == current_class_type) + return current_function_decl; + + return current_class_type; +} + +/* Compute the access of FIELD. This is done by computing + the access available to each type in BASETYPES (which comes + as a list of [via_public/basetype] in reverse order, namely base + class before derived class). The first one which defines a + access defines the access for the field. Otherwise, the + access of the field is that which occurs normally. + + Uses global variables CURRENT_CLASS_TYPE and + CURRENT_FUNCTION_DECL to use friend relationships + if necessary. + + This will be static when lookup_fnfield comes into this file. + + access_public means that the field can be accessed by the current lexical + scope. + + access_protected means that the field cannot be accessed by the current + lexical scope because it is protected. + + access_private means that the field cannot be accessed by the current + lexical scope because it is private. */ + +#if 0 +#define PUBLIC_RETURN return (DECL_PUBLIC (field) = 1), access_public +#define PROTECTED_RETURN return (DECL_PROTECTED (field) = 1), access_protected +#define PRIVATE_RETURN return (DECL_PRIVATE (field) = 1), access_private +#else +#define PUBLIC_RETURN return access_public +#define PROTECTED_RETURN return access_protected +#define PRIVATE_RETURN return access_private +#endif + +#if 0 +/* Disabled with DECL_PUBLIC &c. */ +static tree previous_scope = NULL_TREE; +#endif + +enum access_type +compute_access (basetype_path, field) + tree basetype_path, field; +{ + enum access_type access; + tree types; + tree context; + int protected_ok, via_protected; +#if 1 + /* Replaces static decl above. */ + tree previous_scope; +#endif + + /* The field lives in the current class. */ + if (BINFO_TYPE (basetype_path) == current_class_type) + return access_public; + +#if 0 + /* Disabled until pushing function scope clears these out. If ever. */ + /* Make these special cases fast. */ + if (current_scope () == previous_scope) + { + if (DECL_PUBLIC (field)) + return access_public; + if (DECL_PROTECTED (field)) + return access_protected; + if (DECL_PRIVATE (field)) + return access_private; + } +#endif + + previous_scope = current_scope (); + + context = DECL_CLASS_CONTEXT (field); + if (context == NULL_TREE) + context = DECL_CONTEXT (field); + + /* Fields coming from nested anonymous unions have their DECL_CLASS_CONTEXT + slot set to the union type rather than the record type containing + the anonymous union. In this case, DECL_FIELD_CONTEXT is correct. */ + if (context && TREE_CODE (context) == UNION_TYPE + && ANON_AGGRNAME_P (TYPE_IDENTIFIER (context))) + context = DECL_FIELD_CONTEXT (field); + + /* Virtual function tables are never private. But we should know that + we are looking for this, and not even try to hide it. */ + if (DECL_NAME (field) && VFIELD_NAME_P (DECL_NAME (field)) == 1) + PUBLIC_RETURN; + + /* Member found immediately within object. */ + if (BINFO_INHERITANCE_CHAIN (basetype_path) == NULL_TREE) + { + /* Are we (or an enclosing scope) friends with the class that has + FIELD? */ + if (is_friend (context, previous_scope)) + PUBLIC_RETURN; + + /* If it's private, it's private, you letch. */ + if (TREE_PRIVATE (field)) + PRIVATE_RETURN; + + /* ARM $11.5. Member functions of a derived class can access the + non-static protected members of a base class only through a + pointer to the derived class, a reference to it, or an object + of it. Also any subsequently derived classes also have + access. */ + else if (TREE_PROTECTED (field)) + { + if (current_class_type + && ((TREE_CODE (field) != FUNCTION_DECL && TREE_STATIC (field)) + || (TREE_CODE (field) == FUNCTION_DECL + && DECL_STATIC_FUNCTION_P (field))) + && ACCESSIBLY_DERIVED_FROM_P (context, current_class_type)) + PUBLIC_RETURN; + else + PROTECTED_RETURN; + } + else + PUBLIC_RETURN; + } + + /* must reverse more than one element */ + basetype_path = reverse_path (basetype_path); + types = basetype_path; + via_protected = 0; + access = access_default; + protected_ok = current_class_type + && ACCESSIBLY_UNIQUELY_DERIVED_P (BINFO_TYPE (types), current_class_type); + + while (1) + { + tree member; + tree binfo = types; + tree type = BINFO_TYPE (binfo); + int private_ok = 0; + + /* Friends of a class can see protected members of its bases. + Note that classes are their own friends. */ + if (is_friend (type, previous_scope)) + { + protected_ok = 1; + private_ok = 1; + } + + member = purpose_member (type, DECL_ACCESS (field)); + if (member) + { + access = (enum access_type) TREE_VALUE (member); + break; + } + + types = BINFO_INHERITANCE_CHAIN (types); + + /* If the next type was VIA_PROTECTED, then fields of all remaining + classes past that one are *at least* protected. */ + if (types) + { + if (TREE_VIA_PROTECTED (types)) + via_protected = 1; + else if (! TREE_VIA_PUBLIC (types) && ! private_ok) + { + access = access_private; + break; + } + } + else + break; + } + reverse_path (basetype_path); + + /* No special visibilities apply. Use normal rules. */ + + if (access == access_default) + { + if (is_friend (context, previous_scope)) + access = access_public; + else if (TREE_PRIVATE (field)) + access = access_private; + else if (TREE_PROTECTED (field)) + access = access_protected; + else + access = access_public; + } + + if (access == access_public && via_protected) + access = access_protected; + + if (access == access_protected && protected_ok) + access = access_public; + +#if 0 + if (access == access_public) + DECL_PUBLIC (field) = 1; + else if (access == access_protected) + DECL_PROTECTED (field) = 1; + else if (access == access_private) + DECL_PRIVATE (field) = 1; + else my_friendly_abort (96); +#endif + return access; +} + +/* Routine to see if the sub-object denoted by the binfo PARENT can be + found as a base class and sub-object of the object denoted by + BINFO. This routine relies upon binfos not being shared, except + for binfos for virtual bases. */ +static int +is_subobject_of_p (parent, binfo) + tree parent, binfo; +{ + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + if (parent == binfo) + return 1; + + /* Process and/or queue base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + if (TREE_VIA_VIRTUAL (base_binfo)) + base_binfo = TYPE_BINFO (BINFO_TYPE (base_binfo)); + if (is_subobject_of_p (parent, base_binfo)) + return 1; + } + return 0; +} + +/* See if a one FIELD_DECL hides another. This routine is meant to + correspond to ANSI working paper Sept 17, 1992 10p4. The two + binfos given are the binfos corresponding to the particular places + the FIELD_DECLs are found. This routine relies upon binfos not + being shared, except for virtual bases. */ +static int +hides (hider_binfo, hidee_binfo) + tree hider_binfo, hidee_binfo; +{ + /* hider hides hidee, if hider has hidee as a base class and + the instance of hidee is a sub-object of hider. The first + part is always true is the second part is true. + + When hider and hidee are the same (two ways to get to the exact + same member) we consider either one as hiding the other. */ + return is_subobject_of_p (hidee_binfo, hider_binfo); +} + +/* Very similar to lookup_fnfields_1 but it ensures that at least one + function was declared inside the class given by TYPE. It really should + only return functions that match the given TYPE. */ +static int +lookup_fnfields_here (type, name) + tree type, name; +{ + int index = lookup_fnfields_1 (type, name); + tree fndecls; + + if (index <= 0) + return index; + fndecls = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), index); + while (fndecls) + { + if (TYPE_MAIN_VARIANT (DECL_CLASS_CONTEXT (fndecls)) + == TYPE_MAIN_VARIANT (type)) + return index; + fndecls = TREE_CHAIN (fndecls); + } + return -1; +} + +/* Look for a field named NAME in an inheritance lattice dominated by + XBASETYPE. PROTECT is zero if we can avoid computing access + information, otherwise it is 1. WANT_TYPE is 1 when we should only + return TYPE_DECLs, if no TYPE_DECL can be found return NULL_TREE. + + It was not clear what should happen if WANT_TYPE is set, and an + ambiguity is found. At least one use (lookup_name) to not see + the error. */ +tree +lookup_field (xbasetype, name, protect, want_type) + register tree xbasetype, name; + int protect, want_type; +{ + int head = 0, tail = 0; + tree rval, rval_binfo = NULL_TREE, rval_binfo_h; + tree type, basetype_chain, basetype_path; + enum access_type this_v = access_default; + tree entry, binfo, binfo_h; + enum access_type own_access = access_default; + int vbase_name_p = VBASE_NAME_P (name); + + /* rval_binfo is the binfo associated with the found member, note, + this can be set with useful information, even when rval is not + set, because it must deal with ALL members, not just non-function + members. It is used for ambiguity checking and the hidden + checks. Whereas rval is only set if a proper (not hidden) + non-function member is found. */ + + /* rval_binfo_h and binfo_h are binfo values used when we perform the + hiding checks, as virtual base classes may not be shared. The strategy + is we always go into the the binfo hierarchy owned by TYPE_BINFO of + virtual base classes, as we cross virtual base class lines. This way + we know that binfo of a virtual base class will always == itself when + found along any line. (mrs) */ + + /* Things for memoization. */ + char *errstr = 0; + + /* Set this to nonzero if we don't know how to compute + accurate error messages for access control. */ + int index = MEMOIZED_HASH_FN (name); + + /* If we are looking for a constructor in a templated type, use the + unspecialized name, as that is how we store it. */ + if (IDENTIFIER_TEMPLATE (name)) + name = constructor_name (name); + + if (TREE_CODE (xbasetype) == TREE_VEC) + { + extern struct obstack temporary_obstack; + struct obstack *tmp = current_obstack; + current_obstack = &temporary_obstack; + basetype_path = copy_binfo (xbasetype); + current_obstack = tmp; + type = BINFO_TYPE (xbasetype); + } + else if (IS_AGGR_TYPE_CODE (TREE_CODE (xbasetype))) + basetype_path = TYPE_BINFO (xbasetype), type = xbasetype; + else my_friendly_abort (97); + + if (CLASSTYPE_MTABLE_ENTRY (type)) + { + tree tem = MEMOIZED_FIELDS (CLASSTYPE_MTABLE_ENTRY (type), index); + + while (tem && TREE_PURPOSE (tem) != name) + { + memoized_fields_searched[0]++; + tem = TREE_CHAIN (tem); + } + if (tem) + { + if (protect && TREE_TYPE (tem)) + { + error (TREE_STRING_POINTER (TREE_TYPE (tem)), + IDENTIFIER_POINTER (name), + TYPE_NAME_STRING (DECL_FIELD_CONTEXT (TREE_VALUE (tem)))); + return error_mark_node; + } + if (TREE_VALUE (tem) == NULL_TREE) + memoized_fast_rejects[0] += 1; + else + memoized_fast_finds[0] += 1; + return TREE_VALUE (tem); + } + } + +#ifdef GATHER_STATISTICS + n_calls_lookup_field++; +#endif + if (protect && flag_memoize_lookups && ! global_bindings_p ()) + entry = make_memoized_table_entry (type, name, 0); + else + entry = 0; + + rval = lookup_field_1 (type, name); + if (rval || lookup_fnfields_here (type, name)>=0) + { + rval_binfo = basetype_path; + rval_binfo_h = rval_binfo; + } + + if (rval && TREE_CODE (rval) != TYPE_DECL && want_type) + rval = NULL_TREE; + + if (rval) + { + if (protect) + { + if (TREE_PRIVATE (rval) | TREE_PROTECTED (rval)) + this_v = compute_access (basetype_path, rval); + if (TREE_CODE (rval) == CONST_DECL) + { + if (this_v == access_private) + errstr = "enum `%s' is a private value of class `%s'"; + else if (this_v == access_protected) + errstr = "enum `%s' is a protected value of class `%s'"; + } + else + { + if (this_v == access_private) + errstr = "member `%s' is a private member of class `%s'"; + else if (this_v == access_protected) + errstr = "member `%s' is a protected member of class `%s'"; + } + } + + if (entry) + { + if (errstr) + { + /* This depends on behavior of lookup_field_1! */ + tree error_string = my_build_string (errstr); + TREE_TYPE (entry) = error_string; + } + else + { + /* Let entry know there is no problem with this access. */ + TREE_TYPE (entry) = NULL_TREE; + } + TREE_VALUE (entry) = rval; + } + + if (errstr && protect) + { + error (errstr, IDENTIFIER_POINTER (name), TYPE_NAME_STRING (type)); + return error_mark_node; + } + return rval; + } + + basetype_chain = CLASSTYPE_BINFO_AS_LIST (type); + TREE_VIA_PUBLIC (basetype_chain) = 1; + + /* The ambiguity check relies upon breadth first searching. */ + + search_stack = push_search_level (search_stack, &search_obstack); + BINFO_VIA_PUBLIC (basetype_path) = 1; + BINFO_INHERITANCE_CHAIN (basetype_path) = NULL_TREE; + binfo = basetype_path; + binfo_h = binfo; + + while (1) + { + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + tree nval; + + /* Process and/or queue base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + if (BINFO_FIELDS_MARKED (base_binfo) == 0) + { + tree btypes; + + SET_BINFO_FIELDS_MARKED (base_binfo); + btypes = my_tree_cons (NULL_TREE, base_binfo, basetype_chain); + TREE_VIA_PUBLIC (btypes) = TREE_VIA_PUBLIC (base_binfo); + TREE_VIA_PROTECTED (btypes) = TREE_VIA_PROTECTED (base_binfo); + TREE_VIA_VIRTUAL (btypes) = TREE_VIA_VIRTUAL (base_binfo); + if (TREE_VIA_VIRTUAL (base_binfo)) + btypes = tree_cons (NULL_TREE, + TYPE_BINFO (BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (binfo_h), i))), + btypes); + else + btypes = tree_cons (NULL_TREE, + TREE_VEC_ELT (BINFO_BASETYPES (binfo_h), i), + btypes); + obstack_ptr_grow (&search_obstack, btypes); + tail += 1; + if (tail >= search_stack->limit) + my_friendly_abort (98); + } + } + + /* Process head of queue, if one exists. */ + if (head >= tail) + break; + + basetype_chain = search_stack->first[head++]; + binfo_h = TREE_VALUE (basetype_chain); + basetype_chain = TREE_CHAIN (basetype_chain); + basetype_path = TREE_VALUE (basetype_chain); + if (TREE_CHAIN (basetype_chain)) + BINFO_INHERITANCE_CHAIN (basetype_path) = TREE_VALUE (TREE_CHAIN (basetype_chain)); + else + BINFO_INHERITANCE_CHAIN (basetype_path) = NULL_TREE; + + binfo = basetype_path; + type = BINFO_TYPE (binfo); + + /* See if we can find NAME in TYPE. If RVAL is nonzero, + and we do find NAME in TYPE, verify that such a second + sighting is in fact legal. */ + + nval = lookup_field_1 (type, name); + + if (nval || lookup_fnfields_here (type, name)>=0) + { + if (rval_binfo && hides (rval_binfo_h, binfo_h)) + { + /* This is ok, the member found is in rval_binfo, not + here (binfo). */ + } + else if (rval_binfo==NULL_TREE || hides (binfo_h, rval_binfo_h)) + { + /* This is ok, the member found is here (binfo), not in + rval_binfo. */ + if (nval) + { + rval = nval; + if (entry || protect) + this_v = compute_access (basetype_path, rval); + /* These may look ambiguous, but they really are not. */ + if (vbase_name_p) + break; + } + else + { + /* Undo finding it before, as something else hides it. */ + rval = NULL_TREE; + } + rval_binfo = binfo; + rval_binfo_h = binfo_h; + } + else + { + /* This is ambiguous. */ + errstr = "request for member `%s' is ambiguous"; + protect = 2; + break; + } + } + } + { + tree *tp = search_stack->first; + tree *search_tail = tp + tail; + + if (entry) + TREE_VALUE (entry) = rval; + + if (want_type && (rval == NULL_TREE || TREE_CODE (rval) != TYPE_DECL)) + { + rval = NULL_TREE; + errstr = 0; + } + + /* If this FIELD_DECL defines its own access level, deal with that. */ + if (rval && errstr == 0 + && ((protect&1) || entry) + && DECL_LANG_SPECIFIC (rval) + && DECL_ACCESS (rval)) + { + while (tp < search_tail) + { + /* If is possible for one of the derived types on the path to + have defined special access for this field. Look for such + declarations and report an error if a conflict is found. */ + enum access_type new_v; + + if (this_v != access_default) + new_v = compute_access (TREE_VALUE (TREE_CHAIN (*tp)), rval); + if (this_v != access_default && new_v != this_v) + { + errstr = "conflicting access to member `%s'"; + this_v = access_default; + } + own_access = new_v; + CLEAR_BINFO_FIELDS_MARKED (TREE_VALUE (TREE_CHAIN (*tp))); + tp += 1; + } + } + else + { + while (tp < search_tail) + { + CLEAR_BINFO_FIELDS_MARKED (TREE_VALUE (TREE_CHAIN (*tp))); + tp += 1; + } + } + } + search_stack = pop_search_level (search_stack); + + if (errstr == 0) + { + if (own_access == access_private) + errstr = "member `%s' declared private"; + else if (own_access == access_protected) + errstr = "member `%s' declared protected"; + else if (this_v == access_private) + errstr = TREE_PRIVATE (rval) + ? "member `%s' is private" + : "member `%s' is from private base class"; + else if (this_v == access_protected) + errstr = TREE_PROTECTED (rval) + ? "member `%s' is protected" + : "member `%s' is from protected base class"; + } + + if (entry) + { + if (errstr) + { + tree error_string = my_build_string (errstr); + /* Save error message with entry. */ + TREE_TYPE (entry) = error_string; + } + else + { + /* Mark entry as having no error string. */ + TREE_TYPE (entry) = NULL_TREE; + } + } + + if (errstr && protect) + { + char *p = IDENTIFIER_POINTER (name), *q = NULL; + if (IDENTIFIER_OPNAME_P (name)) + { + q = operator_name_string (name); + p = (char *) xmalloc (9 + strlen (q) + 1); + sprintf (p, "operator %s", q); + } + + error (errstr, p, TYPE_NAME_STRING (type)); + if (q) + free (p); + rval = error_mark_node; + } + return rval; +} + +/* Try to find NAME inside a nested class. */ +tree +lookup_nested_field (name, complain) + tree name; + int complain; +{ + register tree t; + + tree id = NULL_TREE; + if (TREE_CHAIN (current_class_type)) + { + /* Climb our way up the nested ladder, seeing if we're trying to + modify a field in an enclosing class. If so, we should only + be able to modify if it's static. */ + for (t = TREE_CHAIN (current_class_type); + t && DECL_CONTEXT (t); + t = TREE_CHAIN (DECL_CONTEXT (t))) + { + if (TREE_CODE (DECL_CONTEXT (t)) != RECORD_TYPE) + break; + + /* N.B.: lookup_field will do the access checking for us */ + id = lookup_field (DECL_CONTEXT (t), name, complain, 0); + if (id == error_mark_node) + { + id = NULL_TREE; + continue; + } + + if (id != NULL_TREE) + { + if (TREE_CODE (id) == FIELD_DECL + && ! TREE_STATIC (id) + && TREE_TYPE (id) != error_mark_node) + { + if (complain) + { + /* At parse time, we don't want to give this error, since + we won't have enough state to make this kind of + decision properly. But there are times (e.g., with + enums in nested classes) when we do need to call + this fn at parse time. So, in those cases, we pass + complain as a 0 and just return a NULL_TREE. */ + error ("assignment to non-static member `%s' of enclosing class `%s'", + lang_printable_name (id), + IDENTIFIER_POINTER (TYPE_IDENTIFIER + (DECL_CONTEXT (t)))); + /* Mark this for do_identifier(). It would otherwise + claim that the variable was undeclared. */ + TREE_TYPE (id) = error_mark_node; + } + else + { + id = NULL_TREE; + continue; + } + } + break; + } + } + } + + return id; +} + +/* TYPE is a class type. Return the index of the fields within + the method vector with name NAME, or -1 is no such field exists. */ +static int +lookup_fnfields_1 (type, name) + tree type, name; +{ + register tree method_vec = CLASSTYPE_METHOD_VEC (type); + + if (method_vec != 0) + { + register tree *methods = &TREE_VEC_ELT (method_vec, 0); + register tree *end = TREE_VEC_END (method_vec); + +#ifdef GATHER_STATISTICS + n_calls_lookup_fnfields_1++; +#endif + if (*methods && name == constructor_name (type)) + return 0; + + while (++methods != end) + { +#ifdef GATHER_STATISTICS + n_outer_fields_searched++; +#endif + if (DECL_NAME (*methods) == name) + break; + } + if (methods != end) + return methods - &TREE_VEC_ELT (method_vec, 0); + } + + return -1; +} + +/* Starting from BASETYPE, return a TREE_BASELINK-like object + which gives the following information (in a list): + + TREE_TYPE: list of basetypes needed to get to... + TREE_VALUE: list of all functions in of given type + which have name NAME. + + No access information is computed by this function, + other then to adorn the list of basetypes with + TREE_VIA_PUBLIC. + + If there are two ways to find a name (two members), if COMPLAIN is + non-zero, then error_mark_node is returned, and an error message is + printed, otherwise, just an error_mark_node is returned. + + As a special case, is COMPLAIN is -1, we don't complain, and we + don't return error_mark_node, but rather the complete list of + virtuals. This is used by get_virtuals_named_this. */ +tree +lookup_fnfields (basetype_path, name, complain) + tree basetype_path, name; + int complain; +{ + int head = 0, tail = 0; + tree type, rval, rval_binfo = NULL_TREE, rvals = NULL_TREE, rval_binfo_h; + tree entry, binfo, basetype_chain, binfo_h; + int find_all = 0; + + /* rval_binfo is the binfo associated with the found member, note, + this can be set with useful information, even when rval is not + set, because it must deal with ALL members, not just function + members. It is used for ambiguity checking and the hidden + checks. Whereas rval is only set if a proper (not hidden) + function member is found. */ + + /* rval_binfo_h and binfo_h are binfo values used when we perform the + hiding checks, as virtual base classes may not be shared. The strategy + is we always go into the the binfo hierarchy owned by TYPE_BINFO of + virtual base classes, as we cross virtual base class lines. This way + we know that binfo of a virtual base class will always == itself when + found along any line. (mrs) */ + + /* For now, don't try this. */ + int protect = complain; + + /* Things for memoization. */ + char *errstr = 0; + + /* Set this to nonzero if we don't know how to compute + accurate error messages for access control. */ + int index = MEMOIZED_HASH_FN (name); + + if (complain == -1) + { + find_all = 1; + protect = complain = 0; + } + + /* If we are looking for a constructor in a templated type, use the + unspecialized name, as that is how we store it. */ + if (IDENTIFIER_TEMPLATE (name)) + name = constructor_name (name); + + binfo = basetype_path; + binfo_h = binfo; + type = BINFO_TYPE (basetype_path); + + /* The memoization code is in need of maintenance. */ + if (!find_all && CLASSTYPE_MTABLE_ENTRY (type)) + { + tree tem = MEMOIZED_FNFIELDS (CLASSTYPE_MTABLE_ENTRY (type), index); + + while (tem && TREE_PURPOSE (tem) != name) + { + memoized_fields_searched[1]++; + tem = TREE_CHAIN (tem); + } + if (tem) + { + if (protect && TREE_TYPE (tem)) + { + error (TREE_STRING_POINTER (TREE_TYPE (tem)), + IDENTIFIER_POINTER (name), + TYPE_NAME_STRING (DECL_CLASS_CONTEXT (TREE_VALUE (TREE_VALUE (tem))))); + return error_mark_node; + } + if (TREE_VALUE (tem) == NULL_TREE) + { + memoized_fast_rejects[1] += 1; + return NULL_TREE; + } + else + { + /* Want to return this, but we must make sure + that access information is consistent. */ + tree baselink = TREE_VALUE (tem); + tree memoized_basetypes = TREE_PURPOSE (baselink); + tree these_basetypes = basetype_path; + while (memoized_basetypes && these_basetypes) + { + memoized_fields_searched[1]++; + if (TREE_VALUE (memoized_basetypes) != these_basetypes) + break; + memoized_basetypes = TREE_CHAIN (memoized_basetypes); + these_basetypes = BINFO_INHERITANCE_CHAIN (these_basetypes); + } + /* The following statement is true only when both are NULL. */ + if (memoized_basetypes == these_basetypes) + { + memoized_fast_finds[1] += 1; + return TREE_VALUE (tem); + } + /* else, we must re-find this field by hand. */ + baselink = tree_cons (basetype_path, TREE_VALUE (baselink), TREE_CHAIN (baselink)); + return baselink; + } + } + } + +#ifdef GATHER_STATISTICS + n_calls_lookup_fnfields++; +#endif + if (protect && flag_memoize_lookups && ! global_bindings_p ()) + entry = make_memoized_table_entry (type, name, 1); + else + entry = 0; + + index = lookup_fnfields_here (type, name); + if (index >= 0 || lookup_field_1 (type, name)) + { + rval_binfo = basetype_path; + rval_binfo_h = rval_binfo; + } + + if (index >= 0) + { + rval = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), index); + rvals = my_tree_cons (basetype_path, rval, rvals); + if (BINFO_BASETYPES (binfo) && CLASSTYPE_BASELINK_VEC (type)) + TREE_TYPE (rvals) = TREE_VEC_ELT (CLASSTYPE_BASELINK_VEC (type), index); + + if (entry) + { + TREE_VALUE (entry) = rvals; + TREE_TYPE (entry) = NULL_TREE; + } + + if (errstr && protect) + { + error (errstr, IDENTIFIER_POINTER (name), TYPE_NAME_STRING (type)); + return error_mark_node; + } + return rvals; + } + rval = NULL_TREE; + + basetype_chain = CLASSTYPE_BINFO_AS_LIST (type); + TREE_VIA_PUBLIC (basetype_chain) = 1; + + /* The ambiguity check relies upon breadth first searching. */ + + search_stack = push_search_level (search_stack, &search_obstack); + BINFO_VIA_PUBLIC (basetype_path) = 1; + BINFO_INHERITANCE_CHAIN (basetype_path) = NULL_TREE; + binfo = basetype_path; + binfo_h = binfo; + + while (1) + { + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + int index; + + /* Process and/or queue base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + if (BINFO_FIELDS_MARKED (base_binfo) == 0) + { + tree btypes; + + SET_BINFO_FIELDS_MARKED (base_binfo); + btypes = my_tree_cons (NULL_TREE, base_binfo, basetype_chain); + TREE_VIA_PUBLIC (btypes) = TREE_VIA_PUBLIC (base_binfo); + TREE_VIA_PROTECTED (btypes) = TREE_VIA_PROTECTED (base_binfo); + TREE_VIA_VIRTUAL (btypes) = TREE_VIA_VIRTUAL (base_binfo); + if (TREE_VIA_VIRTUAL (base_binfo)) + btypes = tree_cons (NULL_TREE, + TYPE_BINFO (BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (binfo_h), i))), + btypes); + else + btypes = tree_cons (NULL_TREE, + TREE_VEC_ELT (BINFO_BASETYPES (binfo_h), i), + btypes); + obstack_ptr_grow (&search_obstack, btypes); + tail += 1; + if (tail >= search_stack->limit) + my_friendly_abort (99); + } + } + + /* Process head of queue, if one exists. */ + if (head >= tail) + break; + + basetype_chain = search_stack->first[head++]; + binfo_h = TREE_VALUE (basetype_chain); + basetype_chain = TREE_CHAIN (basetype_chain); + basetype_path = TREE_VALUE (basetype_chain); + if (TREE_CHAIN (basetype_chain)) + BINFO_INHERITANCE_CHAIN (basetype_path) = TREE_VALUE (TREE_CHAIN (basetype_chain)); + else + BINFO_INHERITANCE_CHAIN (basetype_path) = NULL_TREE; + + binfo = basetype_path; + type = BINFO_TYPE (binfo); + + /* See if we can find NAME in TYPE. If RVAL is nonzero, + and we do find NAME in TYPE, verify that such a second + sighting is in fact legal. */ + + index = lookup_fnfields_here (type, name); + + if (index >= 0 || (lookup_field_1 (type, name)!=NULL_TREE && !find_all)) + { + if (rval_binfo && !find_all && hides (rval_binfo_h, binfo_h)) + { + /* This is ok, the member found is in rval_binfo, not + here (binfo). */ + } + else if (rval_binfo==NULL_TREE || find_all || hides (binfo_h, rval_binfo_h)) + { + /* This is ok, the member found is here (binfo), not in + rval_binfo. */ + if (index >= 0) + { + rval = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), index); + /* Note, rvals can only be previously set if find_all is + true. */ + rvals = my_tree_cons (basetype_path, rval, rvals); + if (TYPE_BINFO_BASETYPES (type) + && CLASSTYPE_BASELINK_VEC (type)) + TREE_TYPE (rvals) = TREE_VEC_ELT (CLASSTYPE_BASELINK_VEC (type), index); + } + else + { + /* Undo finding it before, as something else hides it. */ + rval = NULL_TREE; + rvals = NULL_TREE; + } + rval_binfo = binfo; + rval_binfo_h = binfo_h; + } + else + { + /* This is ambiguous. */ + errstr = "request for member `%s' is ambiguous"; + rvals = error_mark_node; + break; + } + } + } + { + tree *tp = search_stack->first; + tree *search_tail = tp + tail; + + while (tp < search_tail) + { + CLEAR_BINFO_FIELDS_MARKED (TREE_VALUE (TREE_CHAIN (*tp))); + tp += 1; + } + } + search_stack = pop_search_level (search_stack); + + if (entry) + { + if (errstr) + { + tree error_string = my_build_string (errstr); + /* Save error message with entry. */ + TREE_TYPE (entry) = error_string; + } + else + { + /* Mark entry as having no error string. */ + TREE_TYPE (entry) = NULL_TREE; + TREE_VALUE (entry) = rvals; + } + } + + if (errstr && protect) + { + error (errstr, IDENTIFIER_POINTER (name), TYPE_NAME_STRING (type)); + rvals = error_mark_node; + } + + return rvals; +} + +/* BREADTH-FIRST SEARCH ROUTINES. */ + +/* Search a multiple inheritance hierarchy by breadth-first search. + + TYPE is an aggregate type, possibly in a multiple-inheritance hierarchy. + TESTFN is a function, which, if true, means that our condition has been met, + and its return value should be returned. + QFN, if non-NULL, is a predicate dictating whether the type should + even be queued. */ + +HOST_WIDE_INT +breadth_first_search (binfo, testfn, qfn) + tree binfo; + int (*testfn)(); + int (*qfn)(); +{ + int head = 0, tail = 0; + int rval = 0; + + search_stack = push_search_level (search_stack, &search_obstack); + + while (1) + { + tree binfos = BINFO_BASETYPES (binfo); + int n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + int i; + + /* Process and/or queue base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if (BINFO_MARKED (base_binfo) == 0 + && (qfn == 0 || (*qfn) (binfo, i))) + { + SET_BINFO_MARKED (base_binfo); + obstack_ptr_grow (&search_obstack, binfo); + obstack_ptr_grow (&search_obstack, (HOST_WIDE_INT) i); + tail += 2; + if (tail >= search_stack->limit) + my_friendly_abort (100); + } + } + /* Process head of queue, if one exists. */ + if (head >= tail) + { + rval = 0; + break; + } + + binfo = search_stack->first[head++]; + i = (HOST_WIDE_INT) search_stack->first[head++]; + if (rval = (*testfn) (binfo, i)) + break; + binfo = BINFO_BASETYPE (binfo, i); + } + { + tree *tp = search_stack->first; + tree *search_tail = tp + tail; + while (tp < search_tail) + { + tree binfo = *tp++; + int i = (HOST_WIDE_INT)(*tp++); + CLEAR_BINFO_MARKED (BINFO_BASETYPE (binfo, i)); + } + } + + search_stack = pop_search_level (search_stack); + return rval; +} + +/* Functions to use in breadth first searches. */ +typedef tree (*pft)(); +typedef int (*pfi)(); + +int tree_needs_constructor_p (binfo, i) + tree binfo; + int i; +{ + tree basetype; + my_friendly_assert (i != 0, 296); + basetype = BINFO_TYPE (BINFO_BASETYPE (binfo, i)); + return TYPE_NEEDS_CONSTRUCTING (basetype); +} + +static tree declarator; + +static tree +get_virtuals_named_this (binfo) + tree binfo; +{ + tree fields; + + fields = lookup_fnfields (binfo, declarator, -1); + /* fields cannot be error_mark_node */ + + if (fields == 0) + return 0; + + /* Get to the function decls, and return the first virtual function + with this name, if there is one. */ + while (fields) + { + tree fndecl; + + for (fndecl = TREE_VALUE (fields); fndecl; fndecl = DECL_CHAIN (fndecl)) + if (DECL_VINDEX (fndecl)) + return fields; + fields = next_baselink (fields); + } + return NULL_TREE; +} + +static tree get_virtual_destructor (binfo, i) + tree binfo; + int i; +{ + tree type = BINFO_TYPE (binfo); + if (i >= 0) + type = BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (binfo), i)); + if (TYPE_HAS_DESTRUCTOR (type) + && DECL_VINDEX (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0))) + return TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), 0); + return 0; +} + +int tree_has_any_destructor_p (binfo, i) + tree binfo; + int i; +{ + tree type = BINFO_TYPE (binfo); + if (i >= 0) + type = BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (binfo), i)); + return TYPE_NEEDS_DESTRUCTOR (type); +} + +/* Given a class type TYPE, and a function decl FNDECL, + look for the first function the TYPE's hierarchy which + FNDECL could match as a virtual function. + + DTORP is nonzero if we are looking for a destructor. Destructors + need special treatment because they do not match by name. */ +tree +get_first_matching_virtual (binfo, fndecl, dtorp) + tree binfo, fndecl; + int dtorp; +{ + tree tmp = NULL_TREE; + + /* Breadth first search routines start searching basetypes + of TYPE, so we must perform first ply of search here. */ + if (dtorp) + { + if (tree_has_any_destructor_p (binfo, -1)) + tmp = get_virtual_destructor (binfo, -1); + + if (tmp) + { + if (get_base_distance (DECL_CONTEXT (tmp), + DECL_CONTEXT (fndecl), 0, 0) > 0) + DECL_CONTEXT (fndecl) = DECL_CONTEXT (tmp); + return tmp; + } + + tmp = (tree) breadth_first_search (binfo, + (pfi) get_virtual_destructor, + tree_has_any_destructor_p); + if (tmp) + { + if (get_base_distance (DECL_CONTEXT (tmp), + DECL_CONTEXT (fndecl), 0, 0) > 0) + DECL_CONTEXT (fndecl) = DECL_CONTEXT (tmp); + } + return tmp; + } + else + { + tree drettype, dtypes, btypes, instptr_type; + tree basetype = DECL_CLASS_CONTEXT (fndecl); + tree baselink, best = NULL_TREE; + tree name = DECL_ASSEMBLER_NAME (fndecl); + + declarator = DECL_NAME (fndecl); + if (IDENTIFIER_VIRTUAL_P (declarator) == 0) + return NULL_TREE; + + drettype = TREE_TYPE (TREE_TYPE (fndecl)); + dtypes = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); + if (DECL_STATIC_FUNCTION_P (fndecl)) + instptr_type = NULL_TREE; + else + instptr_type = TREE_TYPE (TREE_VALUE (dtypes)); + + for (baselink = get_virtuals_named_this (binfo); + baselink; baselink = next_baselink (baselink)) + { + for (tmp = TREE_VALUE (baselink); tmp; tmp = DECL_CHAIN (tmp)) + { + if (! DECL_VINDEX (tmp)) + continue; + + btypes = TYPE_ARG_TYPES (TREE_TYPE (tmp)); + if (instptr_type == NULL_TREE) + { + if (compparms (TREE_CHAIN (btypes), dtypes, 3)) + /* Caller knows to give error in this case. */ + return tmp; + return NULL_TREE; + } + + if ((TYPE_READONLY (TREE_TYPE (TREE_VALUE (btypes))) + == TYPE_READONLY (instptr_type)) + && compparms (TREE_CHAIN (btypes), TREE_CHAIN (dtypes), 3)) + { + if (IDENTIFIER_ERROR_LOCUS (name) == NULL_TREE + && ! comptypes (TREE_TYPE (TREE_TYPE (tmp)), drettype, 1)) + { + cp_error ("conflicting return type specified for virtual function `%D'", fndecl); + SET_IDENTIFIER_ERROR_LOCUS (name, basetype); + } + break; + } + } + if (tmp) + { + /* If this is ambiguous, we will warn about it later. */ + if (best) + { + if (get_base_distance (DECL_CLASS_CONTEXT (best), + DECL_CLASS_CONTEXT (tmp), 0, 0) > 0) + best = tmp; + } + else + best = tmp; + } + } + if (best == NULL_TREE && warn_overloaded_virtual) + cp_warning_at ("conflicting specification deriving virtual function `%D'", fndecl); + + if (best) + { + if (get_base_distance (DECL_CONTEXT (best), + DECL_CONTEXT (fndecl), 0, 0) > 0) + DECL_CONTEXT (fndecl) = DECL_CONTEXT (best); + } + return best; + } +} + +/* Return the list of virtual functions which are abstract in type TYPE. + This information is cached, and so must be built on a + non-temporary obstack. */ +tree +get_abstract_virtuals (type) + tree type; +{ + /* For each layer of base class (i.e., the first base class, and each + virtual base class from that one), modify the virtual function table + of the derived class to contain the new virtual function. + A class has as many vfields as it has virtual base classes (total). */ + tree vfields, vbases, base, tmp; + tree vfield = CLASSTYPE_VFIELD (type); + tree fcontext = vfield ? DECL_FCONTEXT (vfield) : NULL_TREE; + tree abstract_virtuals = CLASSTYPE_ABSTRACT_VIRTUALS (type); + + for (vfields = CLASSTYPE_VFIELDS (type); vfields; vfields = TREE_CHAIN (vfields)) + { + int normal; + + /* This code is most likely wrong, and probably only works for single + inheritance or by accident. */ + + /* Find the right base class for this derived class, call it BASE. */ + base = VF_BASETYPE_VALUE (vfields); + if (base == type) + continue; + + /* We call this case NORMAL iff this virtual function table + pointer field has its storage reserved in this class. + This is normally the case without virtual baseclasses + or off-center multiple baseclasses. */ + normal = (base == fcontext + && (VF_BINFO_VALUE (vfields) == NULL_TREE + || ! TREE_VIA_VIRTUAL (VF_BINFO_VALUE (vfields)))); + + if (normal) + tmp = TREE_CHAIN (TYPE_BINFO_VIRTUALS (type)); + else + { + /* n.b.: VF_BASETYPE_VALUE (vfields) is the first basetype + that provides the virtual function table, whereas + VF_DERIVED_VALUE (vfields) is an immediate base type of TYPE + that dominates VF_BASETYPE_VALUE (vfields). The list of + vfields we want lies between these two values. */ + tree binfo = get_binfo (VF_NORMAL_VALUE (vfields), type, 0); + tmp = TREE_CHAIN (BINFO_VIRTUALS (binfo)); + } + + /* Get around dossier entry if there is one. */ + if (flag_dossier) + tmp = TREE_CHAIN (tmp); + + while (tmp) + { + tree base_pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (tmp)); + tree base_fndecl = TREE_OPERAND (base_pfn, 0); + if (DECL_ABSTRACT_VIRTUAL_P (base_fndecl)) + abstract_virtuals = tree_cons (NULL_TREE, base_fndecl, abstract_virtuals); + tmp = TREE_CHAIN (tmp); + } + } + for (vbases = CLASSTYPE_VBASECLASSES (type); vbases; vbases = TREE_CHAIN (vbases)) + { + if (! BINFO_VIRTUALS (vbases)) + continue; + + tmp = TREE_CHAIN (BINFO_VIRTUALS (vbases)); + while (tmp) + { + tree base_pfn = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (tmp)); + tree base_fndecl = TREE_OPERAND (base_pfn, 0); + if (DECL_ABSTRACT_VIRTUAL_P (base_fndecl)) + abstract_virtuals = tree_cons (NULL_TREE, base_fndecl, abstract_virtuals); + tmp = TREE_CHAIN (tmp); + } + } + return nreverse (abstract_virtuals); +} + +/* For the type TYPE, return a list of member functions available from + base classes with name NAME. The TREE_VALUE of the list is a chain of + member functions with name NAME. The TREE_PURPOSE of the list is a + basetype, or a list of base types (in reverse order) which were + traversed to reach the chain of member functions. If we reach a base + type which provides a member function of name NAME, and which has at + most one base type itself, then we can terminate the search. */ + +tree +get_baselinks (type_as_binfo_list, type, name) + tree type_as_binfo_list; + tree type, name; +{ + int head = 0, tail = 0, index; + tree rval = 0, nval = 0; + tree basetypes = type_as_binfo_list; + tree binfo = TYPE_BINFO (type); + + search_stack = push_search_level (search_stack, &search_obstack); + + while (1) + { + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + /* Process and/or queue base types. */ + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree btypes; + + btypes = hash_tree_cons (TREE_VIA_PUBLIC (base_binfo), + TREE_VIA_VIRTUAL (base_binfo), + TREE_VIA_PROTECTED (base_binfo), + NULL_TREE, base_binfo, + basetypes); + obstack_ptr_grow (&search_obstack, btypes); + search_stack->first = (tree *)obstack_base (&search_obstack); + tail += 1; + } + + dont_queue: + /* Process head of queue, if one exists. */ + if (head >= tail) + break; + + basetypes = search_stack->first[head++]; + binfo = TREE_VALUE (basetypes); + type = BINFO_TYPE (binfo); + index = lookup_fnfields_1 (type, name); + if (index >= 0) + { + nval = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (type), index); + rval = hash_tree_cons (0, 0, 0, basetypes, nval, rval); + if (TYPE_BINFO_BASETYPES (type) == 0) + goto dont_queue; + else if (TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type)) == 1) + { + if (CLASSTYPE_BASELINK_VEC (type)) + TREE_TYPE (rval) = TREE_VEC_ELT (CLASSTYPE_BASELINK_VEC (type), index); + goto dont_queue; + } + } + nval = NULL_TREE; + } + + search_stack = pop_search_level (search_stack); + return rval; +} + +tree +next_baselink (baselink) + tree baselink; +{ + tree tmp = TREE_TYPE (baselink); + baselink = TREE_CHAIN (baselink); + while (tmp) + { + /* @@ does not yet add previous base types. */ + baselink = tree_cons (TREE_PURPOSE (tmp), TREE_VALUE (tmp), + baselink); + TREE_TYPE (baselink) = TREE_TYPE (tmp); + tmp = TREE_CHAIN (tmp); + } + return baselink; +} + +/* DEPTH-FIRST SEARCH ROUTINES. */ + +/* Assign unique numbers to _CLASSTYPE members of the lattice + specified by TYPE. The root nodes are marked first; the nodes + are marked depth-fisrt, left-right. */ + +static int cid; + +/* Matrix implementing a relation from CLASSTYPE X CLASSTYPE => INT. + Relation yields 1 if C1 <= C2, 0 otherwise. */ +typedef char mi_boolean; +static mi_boolean *mi_matrix; + +/* Type for which this matrix is defined. */ +static tree mi_type; + +/* Size of the matrix for indexing purposes. */ +static int mi_size; + +/* Return nonzero if class C2 derives from class C1. */ +#define BINFO_DERIVES_FROM(C1, C2) \ + ((mi_matrix+mi_size*(BINFO_CID (C1)-1))[BINFO_CID (C2)-1]) +#define TYPE_DERIVES_FROM(C1, C2) \ + ((mi_matrix+mi_size*(CLASSTYPE_CID (C1)-1))[CLASSTYPE_CID (C2)-1]) +#define BINFO_DERIVES_FROM_STAR(C) \ + (mi_matrix+(BINFO_CID (C)-1)) + +/* This routine converts a pointer to be a pointer of an immediate + base class. The normal convert_pointer_to routine would diagnose + the conversion as ambiguous, under MI code that has the base class + as an ambiguous base class. */ +static tree +convert_pointer_to_single_level (to_type, expr) + tree to_type, expr; +{ + tree binfo_of_derived; + tree last; + + binfo_of_derived = TYPE_BINFO (TREE_TYPE (TREE_TYPE (expr))); + last = get_binfo (to_type, TREE_TYPE (TREE_TYPE (expr)), 0); + BINFO_INHERITANCE_CHAIN (last) = binfo_of_derived; + BINFO_INHERITANCE_CHAIN (binfo_of_derived) = NULL_TREE; + return build_vbase_path (PLUS_EXPR, TYPE_POINTER_TO (to_type), expr, last, 1); +} + +/* The main function which implements depth first search. + + This routine has to remember the path it walked up, when + dfs_init_vbase_pointers is the work function, as otherwise there + would be no record. */ +static void +dfs_walk (binfo, fn, qfn) + tree binfo; + void (*fn)(); + int (*qfn)(); +{ + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if ((*qfn)(base_binfo)) + { + if (fn == dfs_init_vbase_pointers) + { + /* When traversing an arbitrary MI hierarchy, we need to keep + a record of the path we took to get down to the final base + type, as otherwise there would be no record of it, and just + trying to blindly convert at the bottom would be ambiguous. + + The easiest way is to do the conversions one step at a time, + as we know we want the immediate base class at each step. + + The only special trick to converting one step at a time, + is that when we hit the last virtual base class, we must + use the SLOT value for it, and not use the normal convert + routine. We use the last virtual base class, as in our + implementation, we have pointers to all virtual base + classes in the base object. */ + + tree saved_vbase_decl_ptr_intermediate + = vbase_decl_ptr_intermediate; + + if (TREE_VIA_VIRTUAL (base_binfo)) + { + /* No need for the conversion here, as we know it is the + right type. */ + vbase_decl_ptr_intermediate + = (tree)CLASSTYPE_SEARCH_SLOT (BINFO_TYPE (base_binfo)); + } + else + { + vbase_decl_ptr_intermediate + = convert_pointer_to_single_level (BINFO_TYPE (base_binfo), + vbase_decl_ptr_intermediate); + } + + dfs_walk (base_binfo, fn, qfn); + + vbase_decl_ptr_intermediate = saved_vbase_decl_ptr_intermediate; + } else + dfs_walk (base_binfo, fn, qfn); + } + } + + fn (binfo); +} + +/* Predicate functions which serve for dfs_walk. */ +static int numberedp (binfo) tree binfo; +{ return BINFO_CID (binfo); } +static int unnumberedp (binfo) tree binfo; +{ return BINFO_CID (binfo) == 0; } + +static int markedp (binfo) tree binfo; +{ return BINFO_MARKED (binfo); } +static int bfs_markedp (binfo, i) tree binfo; int i; +{ return BINFO_MARKED (BINFO_BASETYPE (binfo, i)); } +static int unmarkedp (binfo) tree binfo; +{ return BINFO_MARKED (binfo) == 0; } +static int bfs_unmarkedp (binfo, i) tree binfo; int i; +{ return BINFO_MARKED (BINFO_BASETYPE (binfo, i)) == 0; } +static int marked_vtable_pathp (binfo) tree binfo; +{ return BINFO_VTABLE_PATH_MARKED (binfo); } +static int bfs_marked_vtable_pathp (binfo, i) tree binfo; int i; +{ return BINFO_VTABLE_PATH_MARKED (BINFO_BASETYPE (binfo, i)); } +static int unmarked_vtable_pathp (binfo) tree binfo; +{ return BINFO_VTABLE_PATH_MARKED (binfo) == 0; } +static int bfs_unmarked_vtable_pathp (binfo, i) tree binfo; int i; +{ return BINFO_VTABLE_PATH_MARKED (BINFO_BASETYPE (binfo, i)) == 0; } +static int marked_new_vtablep (binfo) tree binfo; +{ return BINFO_NEW_VTABLE_MARKED (binfo); } +static int bfs_marked_new_vtablep (binfo, i) tree binfo; int i; +{ return BINFO_NEW_VTABLE_MARKED (BINFO_BASETYPE (binfo, i)); } +static int unmarked_new_vtablep (binfo) tree binfo; +{ return BINFO_NEW_VTABLE_MARKED (binfo) == 0; } +static int bfs_unmarked_new_vtablep (binfo, i) tree binfo; int i; +{ return BINFO_NEW_VTABLE_MARKED (BINFO_BASETYPE (binfo, i)) == 0; } + +static int dfs_search_slot_nonempty_p (binfo) tree binfo; +{ return CLASSTYPE_SEARCH_SLOT (BINFO_TYPE (binfo)) != 0; } + +static int dfs_debug_unmarkedp (binfo) tree binfo; +{ return CLASSTYPE_DEBUG_REQUESTED (BINFO_TYPE (binfo)) == 0; } + +/* The worker functions for `dfs_walk'. These do not need to + test anything (vis a vis marking) if they are paired with + a predicate function (above). */ + +/* Assign each type within the lattice a number which is unique + in the lattice. The first number assigned is 1. */ + +static void +dfs_number (binfo) + tree binfo; +{ + BINFO_CID (binfo) = ++cid; +} + +static void +dfs_unnumber (binfo) + tree binfo; +{ + BINFO_CID (binfo) = 0; +} + +static void +dfs_mark (binfo) tree binfo; +{ SET_BINFO_MARKED (binfo); } + +static void +dfs_unmark (binfo) tree binfo; +{ CLEAR_BINFO_MARKED (binfo); } + +static void +dfs_mark_vtable_path (binfo) tree binfo; +{ SET_BINFO_VTABLE_PATH_MARKED (binfo); } + +static void +dfs_unmark_vtable_path (binfo) tree binfo; +{ CLEAR_BINFO_VTABLE_PATH_MARKED (binfo); } + +static void +dfs_mark_new_vtable (binfo) tree binfo; +{ SET_BINFO_NEW_VTABLE_MARKED (binfo); } + +static void +dfs_unmark_new_vtable (binfo) tree binfo; +{ CLEAR_BINFO_NEW_VTABLE_MARKED (binfo); } + +static void +dfs_clear_search_slot (binfo) tree binfo; +{ CLASSTYPE_SEARCH_SLOT (BINFO_TYPE (binfo)) = 0; } + +static void +dfs_debug_mark (binfo) + tree binfo; +{ + tree t = BINFO_TYPE (binfo); + + /* Use heuristic that if there are virtual functions, + ignore until we see a non-inline virtual function. */ + tree methods = CLASSTYPE_METHOD_VEC (t); + + CLASSTYPE_DEBUG_REQUESTED (t) = 1; + + /* If interface info is known, the value of (?@@?) is correct. */ + if (methods == 0 + || CLASSTYPE_INTERFACE_KNOWN (t) + || (write_virtuals == 2 && TYPE_VIRTUAL_P (t))) + return; + + /* If debug info is requested from this context for this type, supply it. + If debug info is requested from another context for this type, + see if some third context can supply it. */ + if (current_function_decl == NULL_TREE + || DECL_CLASS_CONTEXT (current_function_decl) != t) + { + if (TREE_VEC_ELT (methods, 0)) + methods = TREE_VEC_ELT (methods, 0); + else + methods = TREE_VEC_ELT (methods, 1); + while (methods) + { + if (DECL_VINDEX (methods) + && DECL_SAVED_INSNS (methods) == 0 + && DECL_PENDING_INLINE_INFO (methods) == 0 + && DECL_ABSTRACT_VIRTUAL_P (methods) == 0) + { + /* Somebody, somewhere is going to have to define this + virtual function. When they do, they will provide + the debugging info. */ + return; + } + methods = TREE_CHAIN (methods); + } + } + /* We cannot rely on some alien method to solve our problems, + so we must write out the debug info ourselves. */ + if (write_symbols != DWARF_DEBUG) + DECL_IGNORED_P (TYPE_NAME (t)) = 0; + if (! TREE_ASM_WRITTEN (TYPE_NAME (t))) + rest_of_type_compilation (t, global_bindings_p ()); +} + +/* Attach to the type of the virtual base class, the pointer to the + virtual base class, given the global pointer vbase_decl_ptr. */ +static void +dfs_find_vbases (binfo) + tree binfo; +{ + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = n_baselinks-1; i >= 0; i--) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if (TREE_VIA_VIRTUAL (base_binfo) + && CLASSTYPE_SEARCH_SLOT (BINFO_TYPE (base_binfo)) == 0) + { + tree vbase = BINFO_TYPE (base_binfo); + tree binfo = binfo_member (vbase, vbase_types); + + CLASSTYPE_SEARCH_SLOT (vbase) + = (char *) build (PLUS_EXPR, TYPE_POINTER_TO (vbase), + vbase_decl_ptr, BINFO_OFFSET (binfo)); + } + } + SET_BINFO_VTABLE_PATH_MARKED (binfo); + SET_BINFO_NEW_VTABLE_MARKED (binfo); +} + +static void +dfs_init_vbase_pointers (binfo) + tree binfo; +{ + tree type = BINFO_TYPE (binfo); + tree fields = TYPE_FIELDS (type); + tree path, this_vbase_ptr; + int distance; + + CLEAR_BINFO_VTABLE_PATH_MARKED (binfo); + + /* If there is a dossier, it is the first field, though perhaps from + the base class. Otherwise, the first fields are virtual base class + pointer fields. */ + if (CLASSTYPE_DOSSIER (type) && VFIELD_NAME_P (DECL_NAME (fields))) + /* Get past vtable for the object. */ + fields = TREE_CHAIN (fields); + + if (fields == NULL_TREE + || DECL_NAME (fields) == NULL_TREE + || ! VBASE_NAME_P (DECL_NAME (fields))) + return; + + this_vbase_ptr = vbase_decl_ptr_intermediate; + + if (TYPE_POINTER_TO (type) != TREE_TYPE (this_vbase_ptr)) + my_friendly_abort (125); + + while (fields && DECL_NAME (fields) + && VBASE_NAME_P (DECL_NAME (fields))) + { + tree ref = build (COMPONENT_REF, TREE_TYPE (fields), + build_indirect_ref (this_vbase_ptr, NULL_PTR), fields); + tree init = (tree)CLASSTYPE_SEARCH_SLOT (TREE_TYPE (TREE_TYPE (fields))); + vbase_init_result = tree_cons (binfo_member (TREE_TYPE (TREE_TYPE (fields)), + vbase_types), + build_modify_expr (ref, NOP_EXPR, init), + vbase_init_result); + fields = TREE_CHAIN (fields); + } +} + +/* Sometimes this needs to clear both VTABLE_PATH and NEW_VTABLE. Other + times, just NEW_VTABLE, but optimizer should make both with equal + efficiency (though it does not currently). */ +static void +dfs_clear_vbase_slots (binfo) + tree binfo; +{ + tree type = BINFO_TYPE (binfo); + CLASSTYPE_SEARCH_SLOT (type) = 0; + CLEAR_BINFO_VTABLE_PATH_MARKED (binfo); + CLEAR_BINFO_NEW_VTABLE_MARKED (binfo); +} + +tree +init_vbase_pointers (type, decl_ptr) + tree type; + tree decl_ptr; +{ + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + int old_flag = flag_this_is_variable; + tree binfo = TYPE_BINFO (type); + flag_this_is_variable = -2; + vbase_types = CLASSTYPE_VBASECLASSES (type); + vbase_decl_ptr = decl_ptr; + vbase_decl = build_indirect_ref (decl_ptr, NULL_PTR); + vbase_decl_ptr_intermediate = vbase_decl_ptr; + vbase_init_result = NULL_TREE; + dfs_walk (binfo, dfs_find_vbases, unmarked_vtable_pathp); + dfs_walk (binfo, dfs_init_vbase_pointers, marked_vtable_pathp); + dfs_walk (binfo, dfs_clear_vbase_slots, marked_new_vtablep); + flag_this_is_variable = old_flag; + return vbase_init_result; + } + return 0; +} + +/* Build a COMPOUND_EXPR which when expanded will generate the code + needed to initialize all the virtual function table slots of all + the virtual baseclasses. FOR_TYPE is the type which determines the + virtual baseclasses to use; TYPE is the type of the object to which + the initialization applies. TRUE_EXP is the true object we are + initializing, and DECL_PTR is the pointer to the sub-object we + are initializing. + + When USE_COMPUTED_OFFSETS is non-zero, we can assume that the + object was laidout by a top-level contructor and the computed + offsets are valid to store vtables. When zero, we must store new + vtables through virtual baseclass pointers. */ + +tree +build_vbase_vtables_init (main_binfo, binfo, true_exp, decl_ptr, + use_computed_offsets) + tree main_binfo, binfo; + tree true_exp, decl_ptr; + int use_computed_offsets; +{ + tree for_type = BINFO_TYPE (main_binfo); + tree type = BINFO_TYPE (binfo); + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + int old_flag = flag_this_is_variable; + tree vtable_init_result = NULL_TREE; + tree vbases = CLASSTYPE_VBASECLASSES (type); + + vbase_types = CLASSTYPE_VBASECLASSES (for_type); + vbase_decl_ptr = true_exp ? build_unary_op (ADDR_EXPR, true_exp, 0) : decl_ptr; + vbase_decl = true_exp ? true_exp : build_indirect_ref (decl_ptr, NULL_PTR); + + if (use_computed_offsets) + { + /* This is an object of type IN_TYPE, */ + flag_this_is_variable = -2; + dfs_walk (main_binfo, dfs_find_vbases, unmarked_new_vtablep); + } + + /* Initialized with vtables of type TYPE. */ + while (vbases) + { + /* This time through, not every class's vtable + is going to be initialized. That is, we only initialize + the "last" vtable pointer. */ + + if (CLASSTYPE_VSIZE (BINFO_TYPE (vbases))) + { + tree addr; + tree vtbl = BINFO_VTABLE (vbases); + tree init = build_unary_op (ADDR_EXPR, vtbl, 0); + assemble_external (vtbl); + TREE_USED (vtbl) = 1; + + if (use_computed_offsets) + addr = (tree)CLASSTYPE_SEARCH_SLOT (BINFO_TYPE (vbases)); + else + addr = convert_pointer_to (vbases, vbase_decl_ptr); + + if (addr) + { + tree ref = build_vfield_ref (build_indirect_ref (addr, NULL_PTR), + BINFO_TYPE (vbases)); + init = convert_force (TREE_TYPE (ref), init); + vtable_init_result = tree_cons (NULL_TREE, build_modify_expr (ref, NOP_EXPR, init), + vtable_init_result); + } + } + vbases = TREE_CHAIN (vbases); + } + + dfs_walk (binfo, dfs_clear_vbase_slots, marked_new_vtablep); + + flag_this_is_variable = old_flag; + if (vtable_init_result) + return build_compound_expr (vtable_init_result); + } + return error_mark_node; +} + +void +clear_search_slots (type) + tree type; +{ + dfs_walk (TYPE_BINFO (type), + dfs_clear_search_slot, dfs_search_slot_nonempty_p); +} + +/* get virtual base class types. + This adds type to the vbase_types list in reverse dfs order. + Ordering is very important, so don't change it. */ + +static void +dfs_get_vbase_types (binfo) + tree binfo; +{ + tree binfos = BINFO_BASETYPES (binfo); + tree type = BINFO_TYPE (binfo); + tree these_vbase_types = CLASSTYPE_VBASECLASSES (type); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + if (these_vbase_types) + { + while (these_vbase_types) + { + tree this_type = BINFO_TYPE (these_vbase_types); + + /* We really need to start from a fresh copy of this + virtual basetype! CLASSTYPE_MARKED2 is the shortcut + for BINFO_VBASE_MARKED. */ + if (! CLASSTYPE_MARKED2 (this_type)) + { + vbase_types = make_binfo (integer_zero_node, + this_type, + TYPE_BINFO_VTABLE (this_type), + TYPE_BINFO_VIRTUALS (this_type), + vbase_types); + TREE_VIA_VIRTUAL (vbase_types) = 1; + SET_CLASSTYPE_MARKED2 (this_type); + } + these_vbase_types = TREE_CHAIN (these_vbase_types); + } + } + else for (i = 0; i < n_baselinks; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + if (TREE_VIA_VIRTUAL (base_binfo) && ! BINFO_VBASE_MARKED (base_binfo)) + { + vbase_types = make_binfo (integer_zero_node, BINFO_TYPE (base_binfo), + BINFO_VTABLE (base_binfo), + BINFO_VIRTUALS (base_binfo), vbase_types); + TREE_VIA_VIRTUAL (vbase_types) = 1; + SET_BINFO_VBASE_MARKED (base_binfo); + } + } + SET_BINFO_MARKED (binfo); +} + +/* Some virtual baseclasses might be virtual baseclasses for + other virtual baseclasses. We sort the virtual baseclasses + topologically: in the list returned, the first virtual base + classes have no virtual baseclasses themselves, and any entry + on the list has no dependency on virtual base classes later in the + list. */ +tree +get_vbase_types (type) + tree type; +{ + tree ordered_vbase_types = NULL_TREE, prev, next; + tree vbases; + + vbase_types = NULL_TREE; + dfs_walk (TYPE_BINFO (type), dfs_get_vbase_types, unmarkedp); + dfs_walk (TYPE_BINFO (type), dfs_unmark, markedp); + /* Rely upon the reverse dfs ordering from dfs_get_vbase_types, and now + reverse it so that we get normal dfs ordering. */ + vbase_types = nreverse (vbase_types); + + /* Almost all of the below is not needed now. We should be able to just + return vbase_types directly... (mrs) */ + while (vbase_types) + { + /* Now sort these types. This is essentially a bubble merge. */ + + /* Farm out virtual baseclasses which have no marked ancestors. */ + for (vbases = vbase_types, prev = NULL_TREE; + vbases; vbases = next) + { + next = TREE_CHAIN (vbases); + /* If VBASES does not have any vbases itself, or it's + topologically safe, it goes into the sorted list. */ + if (1 /* ANSI C++ specifies dfs ordering now. */ + || ! CLASSTYPE_VBASECLASSES (BINFO_TYPE (vbases)) + || BINFO_VBASE_MARKED (vbases) == 0) + { + if (prev) + TREE_CHAIN (prev) = TREE_CHAIN (vbases); + else + vbase_types = TREE_CHAIN (vbases); + TREE_CHAIN (vbases) = NULL_TREE; + ordered_vbase_types = chainon (ordered_vbase_types, vbases); + CLEAR_BINFO_VBASE_MARKED (vbases); + } + else + prev = vbases; + } + + /* Now unmark types all of whose ancestors are now on the + `ordered_vbase_types' list. */ + for (vbases = vbase_types; vbases; vbases = TREE_CHAIN (vbases)) + { + /* If all our virtual baseclasses are unmarked, ok. */ + tree t = CLASSTYPE_VBASECLASSES (BINFO_TYPE (vbases)); + while (t && (BINFO_VBASE_MARKED (t) == 0 + || ! CLASSTYPE_VBASECLASSES (BINFO_TYPE (t)))) + t = TREE_CHAIN (t); + if (t == NULL_TREE) + CLEAR_BINFO_VBASE_MARKED (vbases); + } + } + + return ordered_vbase_types; +} + +static void +dfs_record_inheritance (binfo) + tree binfo; +{ + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + mi_boolean *derived_row = BINFO_DERIVES_FROM_STAR (binfo); + + for (i = n_baselinks-1; i >= 0; i--) + { + int j; + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree baseclass = BINFO_TYPE (base_binfo); + mi_boolean *base_row = BINFO_DERIVES_FROM_STAR (base_binfo); + + /* Don't search if there's nothing there! MI_SIZE can be + zero as a result of parse errors. */ + if (TYPE_BINFO_BASETYPES (baseclass) && mi_size > 0) + for (j = mi_size*(CLASSTYPE_CID (baseclass)-1); j >= 0; j -= mi_size) + derived_row[j] |= base_row[j]; + TYPE_DERIVES_FROM (baseclass, BINFO_TYPE (binfo)) = 1; + } + + SET_BINFO_MARKED (binfo); +} + +/* Given a _CLASSTYPE node in a multiple inheritance lattice, + convert the lattice into a simple relation such that, + given to CIDs, C1 and C2, one can determine if C1 <= C2 + or C2 <= C1 or C1 <> C2. + + Once constructed, we walk the lattice depth fisrt, + applying various functions to elements as they are encountered. + + We use xmalloc here, in case we want to randomly free these tables. */ + +#define SAVE_MI_MATRIX + +void +build_mi_matrix (type) + tree type; +{ + tree binfo = TYPE_BINFO (type); + cid = 0; + +#ifdef SAVE_MI_MATRIX + if (CLASSTYPE_MI_MATRIX (type)) + { + mi_size = CLASSTYPE_N_SUPERCLASSES (type) + CLASSTYPE_N_VBASECLASSES (type); + mi_matrix = CLASSTYPE_MI_MATRIX (type); + mi_type = type; + dfs_walk (binfo, dfs_number, unnumberedp); + return; + } +#endif + + mi_size = CLASSTYPE_N_SUPERCLASSES (type) + CLASSTYPE_N_VBASECLASSES (type); + mi_matrix = (char *)xmalloc ((mi_size + 1) * (mi_size + 1)); + mi_type = type; + bzero (mi_matrix, (mi_size + 1) * (mi_size + 1)); + dfs_walk (binfo, dfs_number, unnumberedp); + dfs_walk (binfo, dfs_record_inheritance, unmarkedp); + dfs_walk (binfo, dfs_unmark, markedp); +} + +void +free_mi_matrix () +{ + dfs_walk (TYPE_BINFO (mi_type), dfs_unnumber, numberedp); + +#ifdef SAVE_MI_MATRIX + CLASSTYPE_MI_MATRIX (mi_type) = mi_matrix; +#else + free (mi_matrix); + mi_size = 0; + cid = 0; +#endif +} + +/* If we want debug info for a type TYPE, make sure all its base types + are also marked as being potentially interesting. This avoids + the problem of not writing any debug info for intermediate basetypes + that have abstract virtual functions. */ + +void +note_debug_info_needed (type) + tree type; +{ + dfs_walk (TYPE_BINFO (type), dfs_debug_mark, dfs_debug_unmarkedp); +} + +/* Subroutines of push_class_decls (). */ + +/* Add the instance variables which this class contributed to the + current class binding contour. When a redefinition occurs, + if the redefinition is strictly within a single inheritance path, + we just overwrite (in the case of a data field) or + cons (in the case of a member function) the old declaration with + the new. If the fields are not within a single inheritance path, + we must cons them in either case. + + In order to know what decls are new (stemming from the current + invocation of push_class_decls) we enclose them in an "envelope", + which is a TREE_LIST node where the TREE_PURPOSE slot contains the + new decl (or possibly a list of competing ones), the TREE_VALUE slot + points to the old value and the TREE_CHAIN slot chains together all + envelopes which needs to be "opened" in push_class_decls. Opening an + envelope means: push the old value onto the class_shadowed list, + install the new one and if it's a TYPE_DECL do the same to the + IDENTIFIER_TYPE_VALUE. Such an envelope is recognized by seeing that + the TREE_PURPOSE slot is non-null, and that it is not an identifier. + Because if it is, it could be a set of overloaded methods from an + outer scope. */ + +static void +dfs_pushdecls (binfo) + tree binfo; +{ + tree type = BINFO_TYPE (binfo); + tree fields, *methods, *end; + tree method_vec; + + for (fields = TYPE_FIELDS (type); fields; fields = TREE_CHAIN (fields)) + { + /* Unmark so that if we are in a constructor, and then find that + this field was initialized by a base initializer, + we can emit an error message. */ + if (TREE_CODE (fields) == FIELD_DECL) + TREE_USED (fields) = 0; + + /* Recurse into anonymous unions. */ + if (DECL_NAME (fields) == NULL_TREE + && TREE_CODE (TREE_TYPE (fields)) == UNION_TYPE) + { + dfs_pushdecls (TYPE_BINFO (TREE_TYPE (fields))); + continue; + } + +#if 0 + if (TREE_CODE (fields) != TYPE_DECL) + { + DECL_PUBLIC (fields) = 0; + DECL_PROTECTED (fields) = 0; + DECL_PRIVATE (fields) = 0; + } +#endif + + if (DECL_NAME (fields)) + { + tree class_value = IDENTIFIER_CLASS_VALUE (DECL_NAME (fields)); + + /* If the class value is an envelope of the kind described in + the comment above, we try to rule out possible ambiguities. + If we can't do that, keep a TREE_LIST with possibly ambiguous + decls in there. */ + if (class_value && TREE_CODE (class_value) == TREE_LIST + && TREE_PURPOSE (class_value) != NULL_TREE + && (TREE_CODE (TREE_PURPOSE (class_value)) + != IDENTIFIER_NODE)) + { + tree value = TREE_PURPOSE (class_value); + tree context; + + /* Possible ambiguity. If its defining type(s) + is (are all) derived from us, no problem. */ + if (TREE_CODE (value) != TREE_LIST) + { + context = (TREE_CODE (value) == FUNCTION_DECL + && DECL_VIRTUAL_P (value)) + ? DECL_CLASS_CONTEXT (value) + : DECL_CONTEXT (value); + + if (context && (context == type + || TYPE_DERIVES_FROM (context, type))) + value = fields; + else + value = tree_cons (NULL_TREE, fields, + build_tree_list (NULL_TREE, value)); + } + else + { + /* All children may derive from us, in which case + there is no problem. Otherwise, we have to + keep lists around of what the ambiguities might be. */ + tree values; + int problem = 0; + + for (values = value; values; values = TREE_CHAIN (values)) + { + tree sub_values = TREE_VALUE (values); + + if (TREE_CODE (sub_values) == TREE_LIST) + { + for (; sub_values; sub_values = TREE_CHAIN (sub_values)) + { + register tree list_mbr = TREE_VALUE (sub_values); + + context = (TREE_CODE (list_mbr) == FUNCTION_DECL + && DECL_VIRTUAL_P (list_mbr)) + ? DECL_CLASS_CONTEXT (list_mbr) + : DECL_CONTEXT (list_mbr); + + if (! TYPE_DERIVES_FROM (context, type)) + { + value = tree_cons (NULL_TREE, TREE_VALUE (values), value); + problem = 1; + break; + } + } + } + else + { + context = (TREE_CODE (sub_values) == FUNCTION_DECL + && DECL_VIRTUAL_P (sub_values)) + ? DECL_CLASS_CONTEXT (sub_values) + : DECL_CONTEXT (sub_values); + + if (context && ! TYPE_DERIVES_FROM (context, type)) + { + value = tree_cons (NULL_TREE, values, value); + problem = 1; + break; + } + } + } + if (! problem) value = fields; + } + + /* Mark this as a potentially ambiguous member. */ + if (TREE_CODE (value) == TREE_LIST) + { + /* Leaving TREE_TYPE blank is intentional. + We cannot use `error_mark_node' (lookup_name) + or `unknown_type_node' (all member functions use this). */ + TREE_NONLOCAL_FLAG (value) = 1; + } + + /* Put the new contents in our envelope. */ + TREE_PURPOSE (class_value) = value; + } + else + { + /* See comment above for a description of envelopes. */ + tree envelope = tree_cons (fields, class_value, + closed_envelopes); + + closed_envelopes = envelope; + IDENTIFIER_CLASS_VALUE (DECL_NAME (fields)) = envelope; + } + } + } + + method_vec = CLASSTYPE_METHOD_VEC (type); + if (method_vec != 0) + { + /* Farm out constructors and destructors. */ + methods = &TREE_VEC_ELT (method_vec, 1); + end = TREE_VEC_END (method_vec); + + /* This does not work for multiple inheritance yet. */ + while (methods != end) + { + /* This will cause lookup_name to return a pointer + to the tree_list of possible methods of this name. + If the order is a problem, we can nreverse them. */ + tree tmp; + tree class_value = IDENTIFIER_CLASS_VALUE (DECL_NAME (*methods)); + + if (class_value && TREE_CODE (class_value) == TREE_LIST + && TREE_PURPOSE (class_value) != NULL_TREE + && TREE_CODE (TREE_PURPOSE (class_value)) != IDENTIFIER_NODE) + { + tree old = TREE_PURPOSE (class_value); + + maybe_push_cache_obstack (); + if (TREE_CODE (old) == TREE_LIST) + tmp = tree_cons (DECL_NAME (*methods), *methods, old); + else + { + /* Only complain if we shadow something we can access. */ + if (old + && ((DECL_LANG_SPECIFIC (old) + && DECL_CLASS_CONTEXT (old) == current_class_type) + || ! TREE_PRIVATE (old))) + /* Should figure out access control more accurately. */ + cp_warning ("shadowing member `%#D' with member function `%#D'", + old, *methods); + tmp = build_tree_list (DECL_NAME (*methods), *methods); + } + pop_obstacks (); + + TREE_TYPE (tmp) = unknown_type_node; +#if 0 + TREE_OVERLOADED (tmp) = DECL_OVERLOADED (*methods); +#endif + TREE_NONLOCAL_FLAG (tmp) = 1; + + /* Put the new contents in our envelope. */ + TREE_PURPOSE (class_value) = tmp; + } + else + { + maybe_push_cache_obstack (); + tmp = build_tree_list (DECL_NAME (*methods), *methods); + pop_obstacks (); + + TREE_TYPE (tmp) = unknown_type_node; +#if 0 + TREE_OVERLOADED (tmp) = DECL_OVERLOADED (*methods); +#endif + TREE_NONLOCAL_FLAG (tmp) = 1; + + /* See comment above for a description of envelopes. */ + closed_envelopes = tree_cons (tmp, class_value, + closed_envelopes); + IDENTIFIER_CLASS_VALUE (DECL_NAME (*methods)) = closed_envelopes; + } +#if 0 + tmp = *methods; + while (tmp != 0) + { + DECL_PUBLIC (tmp) = 0; + DECL_PROTECTED (tmp) = 0; + DECL_PRIVATE (tmp) = 0; + tmp = DECL_CHAIN (tmp); + } +#endif + + methods++; + } + } + SET_BINFO_MARKED (binfo); +} + +/* Consolidate unique (by name) member functions. */ +static void +dfs_compress_decls (binfo) + tree binfo; +{ + tree type = BINFO_TYPE (binfo); + tree method_vec = CLASSTYPE_METHOD_VEC (type); + + if (method_vec != 0) + { + /* Farm out constructors and destructors. */ + tree *methods = &TREE_VEC_ELT (method_vec, 1); + tree *end = TREE_VEC_END (method_vec); + + for (; methods != end; methods++) + { + /* This is known to be an envelope of the kind described before + dfs_pushdecls. */ + tree class_value = IDENTIFIER_CLASS_VALUE (DECL_NAME (*methods)); + tree tmp = TREE_PURPOSE (class_value); + + /* This was replaced in scope by somebody else. Just leave it + alone. */ + if (TREE_CODE (tmp) != TREE_LIST) + continue; + + if (TREE_CHAIN (tmp) == NULL_TREE + && TREE_VALUE (tmp) + && DECL_CHAIN (TREE_VALUE (tmp)) == NULL_TREE) + { + TREE_PURPOSE (class_value) = TREE_VALUE (tmp); + } + } + } + CLEAR_BINFO_MARKED (binfo); +} + +/* When entering the scope of a class, we cache all of the + fields that that class provides within its inheritance + lattice. Where ambiguities result, we mark them + with `error_mark_node' so that if they are encountered + without explicit qualification, we can emit an error + message. */ +void +push_class_decls (type) + tree type; +{ + tree id; + struct obstack *ambient_obstack = current_obstack; + +#if 0 + tree tags = CLASSTYPE_TAGS (type); + + while (tags) + { + tree code_type_node; + tree tag; + + switch (TREE_CODE (TREE_VALUE (tags))) + { + case ENUMERAL_TYPE: + code_type_node = enum_type_node; + break; + case RECORD_TYPE: + code_type_node = record_type_node; + break; + case CLASS_TYPE: + code_type_node = class_type_node; + break; + case UNION_TYPE: + code_type_node = union_type_node; + break; + default: + my_friendly_abort (297); + } + tag = xref_tag (code_type_node, TREE_PURPOSE (tags), + TYPE_BINFO_BASETYPE (TREE_VALUE (tags), 0), 0); +#if 0 /* not yet, should get fixed properly later */ + pushdecl (make_type_decl (TREE_PURPOSE (tags), TREE_VALUE (tags))); +#else + pushdecl (build_decl (TYPE_DECL, TREE_PURPOSE (tags), TREE_VALUE (tags))); +#endif + } +#endif + + search_stack = push_search_level (search_stack, &search_obstack); + + id = TYPE_IDENTIFIER (type); + if (IDENTIFIER_TEMPLATE (id) != 0) + { +#if 0 + tree tmpl = IDENTIFIER_TEMPLATE (id); + push_template_decls (DECL_ARGUMENTS (TREE_PURPOSE (tmpl)), + TREE_VALUE (tmpl), 1); +#endif + overload_template_name (id, 1); + } + + /* Push class fields into CLASS_VALUE scope, and mark. */ + dfs_walk (TYPE_BINFO (type), dfs_pushdecls, unmarkedp); + + /* Compress fields which have only a single entry + by a given name, and unmark. */ + dfs_walk (TYPE_BINFO (type), dfs_compress_decls, markedp); + + /* Open up all the closed envelopes and push the contained decls into + class scope. */ + while (closed_envelopes) + { + tree new = TREE_PURPOSE (closed_envelopes); + tree id; + + /* This is messy because the class value may be a *_DECL, or a + TREE_LIST of overloaded *_DECLs or even a TREE_LIST of ambiguous + *_DECLs. The name is stored at different places in these three + cases. */ + if (TREE_CODE (new) == TREE_LIST) + { + if (TREE_PURPOSE (new) != NULL_TREE) + id = TREE_PURPOSE (new); + else + { + tree node = TREE_VALUE (new); + + while (TREE_CODE (node) == TREE_LIST) + node = TREE_VALUE (node); + id = DECL_NAME (node); + } + } + else + id = DECL_NAME (new); + + /* Install the original class value in order to make + pushdecl_class_level work correctly. */ + IDENTIFIER_CLASS_VALUE (id) = TREE_VALUE (closed_envelopes); + if (TREE_CODE (new) == TREE_LIST) + push_class_level_binding (id, new); + else + pushdecl_class_level (new); + closed_envelopes = TREE_CHAIN (closed_envelopes); + } + current_obstack = ambient_obstack; +} + +/* Here's a subroutine we need because C lacks lambdas. */ +static void +dfs_unuse_fields (binfo) + tree binfo; +{ + tree type = TREE_TYPE (binfo); + tree fields; + + for (fields = TYPE_FIELDS (type); fields; fields = TREE_CHAIN (fields)) + { + if (TREE_CODE (fields) != FIELD_DECL) + continue; + + TREE_USED (fields) = 0; + if (DECL_NAME (fields) == NULL_TREE + && TREE_CODE (TREE_TYPE (fields)) == UNION_TYPE) + unuse_fields (TREE_TYPE (fields)); + } +} + +void +unuse_fields (type) + tree type; +{ + dfs_walk (TYPE_BINFO (type), dfs_unuse_fields, unmarkedp); +} + +void +pop_class_decls (type) + tree type; +{ + /* We haven't pushed a search level when dealing with cached classes, + so we'd better not try to pop it. */ + if (search_stack) + search_stack = pop_search_level (search_stack); +} + +static int +bfs_unmark_finished_struct (binfo, i) + tree binfo; + int i; +{ + if (i >= 0) + binfo = BINFO_BASETYPE (binfo, i); + + if (BINFO_NEW_VTABLE_MARKED (binfo)) + { + tree decl, context; + + if (TREE_VIA_VIRTUAL (binfo)) + binfo = binfo_member (BINFO_TYPE (binfo), + CLASSTYPE_VBASECLASSES (current_class_type)); + + decl = BINFO_VTABLE (binfo); + context = DECL_CONTEXT (decl); + DECL_CONTEXT (decl) = 0; + if (write_virtuals >= 0 + && DECL_INITIAL (decl) != BINFO_VIRTUALS (binfo)) + DECL_INITIAL (decl) = build_nt (CONSTRUCTOR, NULL_TREE, + BINFO_VIRTUALS (binfo)); + finish_decl (decl, DECL_INITIAL (decl), NULL_TREE, 0); + DECL_CONTEXT (decl) = context; + } + CLEAR_BINFO_VTABLE_PATH_MARKED (binfo); + CLEAR_BINFO_NEW_VTABLE_MARKED (binfo); + return 0; +} + +void +unmark_finished_struct (type) + tree type; +{ + tree binfo = TYPE_BINFO (type); + bfs_unmark_finished_struct (binfo, -1); + breadth_first_search (binfo, bfs_unmark_finished_struct, bfs_marked_vtable_pathp); +} + +void +print_search_statistics () +{ +#ifdef GATHER_STATISTICS + if (flag_memoize_lookups) + { + fprintf (stderr, "%d memoized contexts saved\n", + n_contexts_saved); + fprintf (stderr, "%d local tree nodes made\n", my_tree_node_counter); + fprintf (stderr, "%d local hash nodes made\n", my_memoized_entry_counter); + fprintf (stderr, "fields statistics:\n"); + fprintf (stderr, " memoized finds = %d; rejects = %d; (searches = %d)\n", + memoized_fast_finds[0], memoized_fast_rejects[0], + memoized_fields_searched[0]); + fprintf (stderr, " memoized_adds = %d\n", memoized_adds[0]); + fprintf (stderr, "fnfields statistics:\n"); + fprintf (stderr, " memoized finds = %d; rejects = %d; (searches = %d)\n", + memoized_fast_finds[1], memoized_fast_rejects[1], + memoized_fields_searched[1]); + fprintf (stderr, " memoized_adds = %d\n", memoized_adds[1]); + } + fprintf (stderr, "%d fields searched in %d[%d] calls to lookup_field[_1]\n", + n_fields_searched, n_calls_lookup_field, n_calls_lookup_field_1); + fprintf (stderr, "%d fnfields searched in %d calls to lookup_fnfields\n", + n_outer_fields_searched, n_calls_lookup_fnfields); + fprintf (stderr, "%d calls to get_base_type\n", n_calls_get_base_type); +#else + fprintf (stderr, "no search statistics\n"); +#endif +} + +void +init_search_processing () +{ + gcc_obstack_init (&search_obstack); + gcc_obstack_init (&type_obstack); + gcc_obstack_init (&type_obstack_entries); + + /* This gives us room to build our chains of basetypes, + whether or not we decide to memoize them. */ + type_stack = push_type_level (0, &type_obstack); + _vptr_name = get_identifier ("_vptr"); +} + +void +reinit_search_statistics () +{ + my_memoized_entry_counter = 0; + memoized_fast_finds[0] = 0; + memoized_fast_finds[1] = 0; + memoized_adds[0] = 0; + memoized_adds[1] = 0; + memoized_fast_rejects[0] = 0; + memoized_fast_rejects[1] = 0; + memoized_fields_searched[0] = 0; + memoized_fields_searched[1] = 0; + n_fields_searched = 0; + n_calls_lookup_field = 0, n_calls_lookup_field_1 = 0; + n_calls_lookup_fnfields = 0, n_calls_lookup_fnfields_1 = 0; + n_calls_get_base_type = 0; + n_outer_fields_searched = 0; + n_contexts_saved = 0; +} diff --git a/gcc/cp/sig.c b/gcc/cp/sig.c new file mode 100644 index 0000000..979d7aa --- /dev/null +++ b/gcc/cp/sig.c @@ -0,0 +1,998 @@ +/* Functions dealing with signatures and signature pointers/references. + Copyright (C) 1992 Free Software Foundation, Inc. + Contributed by Gerald Baumgartner (gb@cs.purdue.edu) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#include "config.h" +#include <stdio.h> +#include "obstack.h" +#include "tree.h" +#include "cp-tree.h" +#include "flags.h" +#include "assert.h" + +extern struct obstack *current_obstack; +extern struct obstack permanent_obstack; +extern struct obstack *saveable_obstack; + +extern void error (); +extern void sorry (); +extern void compiler_error (); +extern void make_decl_rtl PROTO((tree, char *, int)); + +/* Used to help generate globally unique names for signature tables. */ + +static int global_sigtable_name_counter; + +/* Build an identifier for a signature pointer or reference, so we + can use it's name in function name mangling. */ + +static tree +build_signature_pointer_or_reference_name (to_type, constp, volatilep, refp) + tree to_type; + int constp, volatilep, refp; +{ + char * sig_name = TYPE_NAME_STRING (to_type); + int name_len = TYPE_NAME_LENGTH (to_type) + constp + volatilep; + char * name; + + if (refp) + { + name = (char *) alloca (name_len + sizeof (SIGNATURE_REFERENCE_NAME) +2); + sprintf (name, SIGNATURE_REFERENCE_NAME_FORMAT, + constp ? "C" : "", volatilep ? "V": "", sig_name); + } + else + { + name = (char *) alloca (name_len + sizeof (SIGNATURE_POINTER_NAME) + 2); + sprintf (name, SIGNATURE_POINTER_NAME_FORMAT, + constp ? "C" : "", volatilep ? "V": "", sig_name); + } + return get_identifier (name); +} + +/* Build a DECL node for a signature pointer or reference, so we can + tell the debugger the structure of signature pointers/references. + This function is called at most eight times for a given signature, + once for each [const] [volatile] signature pointer/reference. */ + +static void +build_signature_pointer_or_reference_decl (type, name) + tree type, name; +{ + tree decl; + + /* We don't enter this declaration in any sort of symbol table. */ + decl = build_decl (TYPE_DECL, name, type); + TYPE_NAME (type) = decl; + TREE_CHAIN (type) = decl; +} + +/* Construct, lay out and return the type of pointers or references + to signature TO_TYPE. If such a type has already been constructed, + reuse it. If CONSTP or VOLATILEP is specified, make the `optr' const + or volatile, respectively. If we are constructing a const/volatile + type variant and the main type variant doesn't exist yet, it is built + as well. If REFP is 1, we construct a signature reference, otherwise + a signature pointer is constructed. + + This function is a subroutine of `build_signature_pointer_type' and + `build_signature_reference_type'. */ + +static tree +build_signature_pointer_or_reference_type (to_type, constp, volatilep, refp) + tree to_type; + int constp, volatilep, refp; +{ + register tree t, m; + register struct obstack *ambient_obstack = current_obstack; + register struct obstack *ambient_saveable_obstack = saveable_obstack; + + m = refp ? SIGNATURE_REFERENCE_TO (to_type) : SIGNATURE_POINTER_TO (to_type); + + /* If we don't have the main variant yet, construct it. */ + if (m == NULL_TREE + && (constp || volatilep)) + m = build_signature_pointer_or_reference_type (to_type, 0, 0, refp); + + /* Treat any nonzero argument as 1. */ + constp = !!constp; + volatilep = !!volatilep; + refp = !!refp; + + /* If not generating auxiliary info, search the chain of variants to see + if there is already one there just like the one we need to have. If so, + use that existing one. + + We don't do this in the case where we are generating aux info because + in that case we want each typedef names to get it's own distinct type + node, even if the type of this new typedef is the same as some other + (existing) type. */ + + if (m && !flag_gen_aux_info) + for (t = m; t; t = TYPE_NEXT_VARIANT (t)) + if (constp == TYPE_READONLY (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (t)))) + && volatilep == TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (t))))) + return t; + + /* We need a new one. If TO_TYPE is permanent, make this permanent too. */ + if (TREE_PERMANENT (to_type)) + { + current_obstack = &permanent_obstack; + saveable_obstack = &permanent_obstack; + } + + /* A signature pointer or reference to a signature `s' looks like this: + + struct { + void * optr; + const s * sptr; + vtbl_type_node * vptr; + }; + + A `const' signature pointer/reference is a + + struct { + const void * optr; + const s * sptr; + vtbl_type_node * vptr; + }; + + Similarly, for `volatile' and `const volatile'. + */ + + t = make_lang_type (RECORD_TYPE); + { + tree obj_type = build_type_variant (void_type_node, constp, volatilep); + tree optr_type = build_pointer_type (obj_type); + tree optr, sptr, vptr; + + optr = build_lang_field_decl (FIELD_DECL, + get_identifier (SIGNATURE_OPTR_NAME), + optr_type); + DECL_FIELD_CONTEXT (optr) = t; + DECL_CLASS_CONTEXT (optr) = t; + + if (m) + { + /* We can share `sptr' and `vptr' among type variants. */ + sptr = TREE_CHAIN (TYPE_FIELDS (m)); + vptr = TREE_CHAIN (sptr); + } + else + { + tree sig_tbl_type = build_type_variant (to_type, 1, 0); + + sptr = build_lang_field_decl (FIELD_DECL, + get_identifier (SIGNATURE_SPTR_NAME), + build_pointer_type (sig_tbl_type)); + vptr = build_lang_field_decl (FIELD_DECL, + get_identifier (SIGNATURE_VPTR_NAME), + build_pointer_type (vtbl_type_node)); + DECL_FIELD_CONTEXT (sptr) = t; + DECL_CLASS_CONTEXT (sptr) = t; + DECL_FIELD_CONTEXT (vptr) = t; + DECL_CLASS_CONTEXT (vptr) = t; + TREE_CHAIN (sptr) = vptr; + TREE_CHAIN (vptr) = NULL_TREE; + } + + TREE_CHAIN (optr) = sptr; + TYPE_FIELDS (t) = optr; + /* To make `build_vfn_ref' work when building a signature method call. */ + CLASSTYPE_VFIELD (t) = vptr; + DECL_FCONTEXT (CLASSTYPE_VFIELD (t)) = t; + TYPE_ALIGN (t) = TYPE_ALIGN (optr_type); + } + + { + tree name = build_signature_pointer_or_reference_name (to_type, constp, + volatilep, refp); + + /* Build a DECL node for this type, so the debugger has access to it. */ + build_signature_pointer_or_reference_decl (t, name); + } + + CLASSTYPE_GOT_SEMICOLON (t) = 1; + IS_SIGNATURE_POINTER (t) = ! refp; + IS_SIGNATURE_REFERENCE (t) = refp; + SIGNATURE_TYPE (t) = to_type; + + if (m) + { + /* Add this type to the chain of variants of TYPE. + Every type has to be its own TYPE_MAIN_VARIANT. */ + TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (m); + TYPE_NEXT_VARIANT (m) = t; + } + else if (refp) + /* Record this type as the reference to TO_TYPE. */ + SIGNATURE_REFERENCE_TO (to_type) = t; + else + /* Record this type as the pointer to TO_TYPE. */ + SIGNATURE_POINTER_TO (to_type) = t; + + /* Lay out the type. This function has many callers that are concerned + with expression-construction, and this simplifies them all. + Also, it guarantees the TYPE_SIZE is permanent if the type is. */ + layout_type (t); + + current_obstack = ambient_obstack; + saveable_obstack = ambient_saveable_obstack; + + /* Ouput debug information for this type. */ + rest_of_type_compilation (t, 1); + + return t; +} + +/* Construct, lay out and return the type of pointers to signature TO_TYPE. */ + +tree +build_signature_pointer_type (to_type, constp, volatilep) + tree to_type; + int constp, volatilep; +{ + return + build_signature_pointer_or_reference_type (to_type, constp, volatilep, 0); +} + +/* Construct, lay out and return the type of pointers to signature TO_TYPE. */ + +tree +build_signature_reference_type (to_type, constp, volatilep) + tree to_type; + int constp, volatilep; +{ + return + build_signature_pointer_or_reference_type (to_type, constp, volatilep, 1); +} + +/* Return the name of the signature table (as an IDENTIFIER_NODE) + for the given signature type SIG_TYPE and rhs type RHS_TYPE. */ + +static tree +get_sigtable_name (sig_type, rhs_type) + tree sig_type, rhs_type; +{ + tree sig_type_id = build_typename_overload (sig_type); + tree rhs_type_id = build_typename_overload (rhs_type); + char *buf = (char *) alloca (sizeof (SIGTABLE_NAME_FORMAT_LONG) + + IDENTIFIER_LENGTH (sig_type_id) + + IDENTIFIER_LENGTH (rhs_type_id) + 20); + char *sig_ptr = IDENTIFIER_POINTER (sig_type_id); + char *rhs_ptr = IDENTIFIER_POINTER (rhs_type_id); + int i, j; + + for (i = 0; sig_ptr[i] == OPERATOR_TYPENAME_FORMAT[i]; i++) + /* do nothing */; + while (sig_ptr[i] >= '0' && sig_ptr[i] <= '9') + i += 1; + + for (j = 0; rhs_ptr[j] == OPERATOR_TYPENAME_FORMAT[j]; j++) + /* do nothing */; + while (rhs_ptr[j] >= '0' && rhs_ptr[j] <= '9') + j += 1; + + if (IS_SIGNATURE (rhs_type)) + sprintf (buf, SIGTABLE_NAME_FORMAT_LONG, sig_ptr+i, rhs_ptr+j, + global_sigtable_name_counter++); + else + sprintf (buf, SIGTABLE_NAME_FORMAT, sig_ptr+i, rhs_ptr+j); + return get_identifier (buf); +} + +/* Build a field decl that points to a signature member function. */ + +static tree +build_member_function_pointer (member) + tree member; +{ + char *namstr = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (member)); + int namlen = IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (member)); + char *name; + tree entry; + + name = (char *) alloca (namlen + sizeof (SIGNATURE_FIELD_NAME) + 2); + sprintf (name, SIGNATURE_FIELD_NAME_FORMAT, namstr); + + /* @@ Do we really want to xref signature table fields? */ + GNU_xref_ref (current_function_decl, name); + + entry = build_lang_field_decl (FIELD_DECL, get_identifier (name), + TYPE_MAIN_VARIANT (sigtable_entry_type)); + TREE_CONSTANT (entry) = 1; + TREE_READONLY (entry) = 1; + + /* @@ Do we really want to xref signature table fields? */ + GNU_xref_decl (current_function_decl, entry); + + return entry; +} + +/* For each FUNCTION_DECL in a signature we construct a member function + pointer of the appropriate type. We also need two flags to test + whether the member function pointer points to a virtual function or + to a default implementation. Those flags will be the two lower order + bits of the member function pointer (or the two higher order bits, + based on the configuration). + + The new FIELD_DECLs are appended at the end of the last (and only) + sublist of `list_of_fieldlists.' + + As a side effect, each member function in the signature gets the + `decl.ignored' bit turned on, so we don't output debug info for it. */ + +void +append_signature_fields (list_of_fieldlists) + tree list_of_fieldlists; +{ + tree l, x; + tree last_x = NULL_TREE; + tree mfptr; + tree last_mfptr; + tree mfptr_list = NULL_TREE; + + /* For signatures it should actually be only a list with one element. */ + for (l = list_of_fieldlists; l; l = TREE_CHAIN (l)) + { + for (x = TREE_VALUE (l); x; x = TREE_CHAIN (x)) + { + if (TREE_CODE (x) == FUNCTION_DECL) + { + mfptr = build_member_function_pointer (x); + DECL_MEMFUNC_POINTER_TO (x) = mfptr; + DECL_MEMFUNC_POINTING_TO (mfptr) = x; + DECL_IGNORED_P (x) = 1; + DECL_IN_AGGR_P (mfptr) = 1; + if (! mfptr_list) + mfptr_list = last_mfptr = mfptr; + else + { + TREE_CHAIN (last_mfptr) = mfptr; + last_mfptr = mfptr; + } + } + last_x = x; + } + } + + /* Append the lists. */ + if (last_x && mfptr_list) + { + TREE_CHAIN (last_x) = mfptr_list; + TREE_CHAIN (last_mfptr) = NULL_TREE; + } +} + +/* Compare the types of a signature member function and a class member + function. Returns 1 if the types are in the C++ `<=' relationship. + + If we have a signature pointer/reference as argument or return type + we don't want to do a recursive conformance check. The conformance + check only succeeds if both LHS and RHS refer to the same signature + pointer. Otherwise we need to keep information about parameter types + around at run time to initialize the signature table correctly. */ + +static int +match_method_types (sig_mtype, class_mtype) + tree sig_mtype, class_mtype; +{ + tree sig_return_type = TREE_TYPE (sig_mtype); + tree sig_arg_types = TYPE_ARG_TYPES (sig_mtype); + tree class_return_type = TREE_TYPE (class_mtype); + tree class_arg_types = TYPE_ARG_TYPES (class_mtype); + + /* The return types have to be the same. */ + if (! comptypes (sig_return_type, class_return_type, 1)) + return 0; + + /* Compare the first argument `this.' */ + { + /* Get the type of what the `optr' is pointing to. */ + tree sig_this = + TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_VALUE (sig_arg_types)))); + tree class_this = TREE_VALUE (class_arg_types); + + if (TREE_CODE (class_this) == RECORD_TYPE) /* Is `this' a sig ptr? */ + class_this = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (class_this))); + else + class_this = TREE_TYPE (class_this); + + /* If a signature method's `this' is const or volatile, so has to be + the corresponding class method's `this.' */ + if ((TYPE_READONLY (sig_this) && ! TYPE_READONLY (class_this)) + || (TYPE_VOLATILE (sig_this) && ! TYPE_VOLATILE (class_this))) + return 0; + } + + sig_arg_types = TREE_CHAIN (sig_arg_types); + class_arg_types = TREE_CHAIN (class_arg_types); + + /* The number of arguments and the argument types have to be the same. */ + return compparms (sig_arg_types, class_arg_types, 3); +} + +/* Undo casts of opaque type variables to the RHS types. */ +static void +undo_casts (sig_ty) + tree sig_ty; +{ + tree field = TYPE_FIELDS (sig_ty); + + /* Since all the FIELD_DECLs for the signature table entries are at the end + of the chain (see `append_signature_fields'), we can do it this way. */ + for (; field && TREE_CODE (field) != FIELD_DECL; field = TREE_CHAIN (field)) + if (TYPE_MAIN_VARIANT (TREE_TYPE (field)) == opaque_type_node) + TREE_TYPE (TREE_TYPE (field)) = TREE_TYPE (ptr_type_node); +} + +/* Do the type checking necessary to see whether the `rhs' conforms to + the lhs's `sig_ty'. Depending on the type of `rhs' return a NULL_TREE, + an integer_zero_node, a constructor, or an expression offsetting the + `rhs' signature table. */ + +static tree +build_signature_table_constructor (sig_ty, rhs) + tree sig_ty, rhs; +{ + tree rhstype = TREE_TYPE (rhs); + tree sig_field = TYPE_FIELDS (sig_ty); + tree result = NULL_TREE; + tree first_rhs_field = NULL_TREE; + tree last_rhs_field; + int sig_ptr_p = IS_SIGNATURE (rhstype); + int offset_p = sig_ptr_p; + + rhstype = sig_ptr_p ? rhstype : TREE_TYPE (rhstype); + + if (CLASSTYPE_TAGS (sig_ty)) + { + sorry ("conformance check with signature containing class declarations"); + return error_mark_node; + } + + for (; sig_field; sig_field = TREE_CHAIN (sig_field)) + { + tree basetype_path, baselink, basetypes; + tree sig_method, sig_mname, sig_mtype; + tree rhs_method, tbl_entry; + + if (TREE_CODE (sig_field) == TYPE_DECL) + { + tree sig_field_type = TREE_TYPE (sig_field); + + if (TYPE_MAIN_VARIANT (sig_field_type) == opaque_type_node) + { + /* We've got an opaque type here. */ + tree oty_name = DECL_NAME (sig_field); + tree oty_type = lookup_field (rhstype, oty_name, 1, 1); + + if (oty_type == NULL_TREE || oty_type == error_mark_node) + { + cp_error ("class `%T' does not contain type `%T'", + rhstype, oty_type); + undo_casts (sig_ty); + return error_mark_node; + } + oty_type = TREE_TYPE (oty_type); + + /* Cast `sig_field' to be of type `oty_type'. This will be + undone in `undo_casts' by walking over all the TYPE_DECLs. */ + TREE_TYPE (sig_field_type) = TREE_TYPE (oty_type); + } + /* If we don't have an opaque type, we can ignore the `typedef'. */ + continue; + } + + /* Find the signature method corresponding to `sig_field'. */ + sig_method = DECL_MEMFUNC_POINTING_TO (sig_field); + sig_mname = DECL_NAME (sig_method); + sig_mtype = TREE_TYPE (sig_method); + + basetype_path = TYPE_BINFO (rhstype); + baselink = lookup_fnfields (basetype_path, sig_mname, 0); + if (baselink == NULL_TREE || baselink == error_mark_node) + { + if (! IS_DEFAULT_IMPLEMENTATION (sig_method)) + { + cp_error ("class `%T' does not contain method `%s'", + rhstype, (int) IDENTIFIER_POINTER (sig_mname)); + undo_casts (sig_ty); + return error_mark_node; + } + else + { + /* We use the signature's default implementation. */ + rhs_method = sig_method; + } + } + else + { + /* Find the class method of the correct type. */ + + basetypes = TREE_PURPOSE (baselink); + if (TREE_CODE (basetypes) == TREE_LIST) + basetypes = TREE_VALUE (basetypes); + + rhs_method = TREE_VALUE (baselink); + for (; rhs_method; rhs_method = TREE_CHAIN (rhs_method)) + if (sig_mname == DECL_NAME (rhs_method) + && ! DECL_STATIC_FUNCTION_P (rhs_method) + && match_method_types (sig_mtype, TREE_TYPE (rhs_method))) + break; + + if (rhs_method == NULL_TREE + || (compute_access (basetypes, rhs_method) + != access_public)) + { + error ("class `%s' does not contain a method conforming to `%s'", + TYPE_NAME_STRING (rhstype), + fndecl_as_string (NULL, sig_method, 1)); + undo_casts (sig_ty); + return error_mark_node; + } + } + + if (sig_ptr_p && rhs_method != sig_method) + { + tree rhs_field = DECL_MEMFUNC_POINTER_TO (rhs_method); + + if (first_rhs_field == NULL_TREE) + { + first_rhs_field = rhs_field; + last_rhs_field = rhs_field; + } + else if (TREE_CHAIN (last_rhs_field) == rhs_field) + last_rhs_field = rhs_field; + else + offset_p = 0; + + tbl_entry = build_component_ref (rhs, DECL_NAME (rhs_field), + NULL_TREE, 1); + } + else + { + tree code, offset, pfn; + + if (rhs_method == sig_method) + { + code = integer_two_node; + offset = integer_zero_node; + pfn = build_unary_op (ADDR_EXPR, rhs_method, 0); + TREE_TYPE (pfn) = ptr_type_node; + offset_p = 0; /* we can't offset the rhs sig table */ + } + else if (DECL_VINDEX (rhs_method)) + { + code = integer_one_node; + offset = DECL_VINDEX (rhs_method); + pfn = null_pointer_node; + } + else + { + code = integer_zero_node; + offset = integer_zero_node; + pfn = build_unary_op (ADDR_EXPR, rhs_method, 0); + TREE_TYPE (pfn) = ptr_type_node; + } + + tbl_entry = tree_cons (NULL_TREE, code, + tree_cons (NULL_TREE, offset, + build_tree_list (NULL_TREE, pfn))); + tbl_entry = build_nt (CONSTRUCTOR, NULL_TREE, tbl_entry); + TREE_HAS_CONSTRUCTOR (tbl_entry) = 1; + TREE_CONSTANT (tbl_entry) = 1; + } + + /* Chain those function address expressions together. */ + if (result) + result = tree_cons (NULL_TREE, tbl_entry, result); + else + result = build_tree_list (NULL_TREE, tbl_entry); + } + + if (result == NULL_TREE) + { + undo_casts (sig_ty); + return NULL_TREE; + } + + if (offset_p) + { + if (first_rhs_field == TYPE_FIELDS (rhstype)) + { + undo_casts (sig_ty); + return integer_zero_node; + } + else + { + undo_casts (sig_ty); + return build_component_ref (rhs, DECL_NAME (first_rhs_field), + NULL_TREE, 0); + } + } + + result = build_nt (CONSTRUCTOR, NULL_TREE, nreverse (result)); + TREE_HAS_CONSTRUCTOR (result) = 1; + TREE_CONSTANT (result) = !sig_ptr_p; + + undo_casts (sig_ty); + return result; +} + +/* Build a signature table declaration and initialize it or return an + existing one if we built one already. If we don't get a constructor + as initialization expression, we don't need a new signature table + variable and just hand back the init expression. + + The declaration processing is done by hand instead of using `finish_decl' + so that we can make signature pointers global variables instead of + static ones. */ + +static tree +build_sigtable (sig_type, rhs_type, init_from) + tree sig_type, rhs_type, init_from; +{ + tree name = NULL_TREE; + tree decl = NULL_TREE; + tree init_expr; + + push_obstacks_nochange (); + end_temporary_allocation (); + + if (! IS_SIGNATURE (rhs_type)) + { + name = get_sigtable_name (sig_type, rhs_type); + decl = IDENTIFIER_GLOBAL_VALUE (name); + } + if (decl == NULL_TREE) + { + tree init; + + /* We allow only one signature table to be generated for signatures + with opaque types. Otherwise we create a loophole in the type + system since we could cast data from one classes implementation + of the opaque type to that of another class. */ + if (SIGNATURE_HAS_OPAQUE_TYPEDECLS (sig_type) + && SIGTABLE_HAS_BEEN_GENERATED (sig_type)) + { + error ("signature with opaque type implemented by multiple classes"); + return error_mark_node; + } + SIGTABLE_HAS_BEEN_GENERATED (sig_type) = 1; + + init_expr = build_signature_table_constructor (sig_type, init_from); + if (TREE_CODE (init_expr) != CONSTRUCTOR) + return init_expr; + + if (name == NULL_TREE) + name = get_sigtable_name (sig_type, rhs_type); + { + tree context = current_function_decl; + + /* Make the signature table global, not just static in whichever + function a signature pointer/ref is used for the first time. */ + current_function_decl = NULL_TREE; + decl = pushdecl_top_level (build_decl (VAR_DECL, name, sig_type)); + current_function_decl = context; + } + IDENTIFIER_GLOBAL_VALUE (name) = decl; + store_init_value (decl, init_expr); + if (IS_SIGNATURE (rhs_type)) + { + init = DECL_INITIAL (decl); + DECL_INITIAL (decl) = error_mark_node; + } + + DECL_ALIGN (decl) = MAX (TYPE_ALIGN (double_type_node), + DECL_ALIGN (decl)); +#if 0 + /* GDB-4.7 doesn't find the initialization value of a signature table + when it is constant. */ + TREE_READONLY (decl) = 1; +#endif + TREE_STATIC (decl) = 1; + TREE_USED (decl) = 1; + + make_decl_rtl (decl, NULL, 1); + if (IS_SIGNATURE (rhs_type)) + expand_static_init (decl, init); + } + + pop_obstacks (); + + return decl; +} + +/* Create a constructor or modify expression if the LHS of an assignment + is a signature pointer or a signature reference. If LHS is a record + type node, we build a constructor, otherwise a compound expression. */ + +tree +build_signature_pointer_constructor (lhs, rhs) + tree lhs, rhs; +{ + register struct obstack *ambient_obstack = current_obstack; + register struct obstack *ambient_saveable_obstack = saveable_obstack; + int initp = (TREE_CODE (lhs) == RECORD_TYPE); + tree lhstype = initp ? lhs : TREE_TYPE (lhs); + tree rhstype = TREE_TYPE (rhs); + tree sig_ty = SIGNATURE_TYPE (lhstype); + tree sig_tbl, sptr_expr, optr_expr, vptr_expr; + tree result; + + if (! ((TREE_CODE (rhstype) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (rhstype)) == RECORD_TYPE) + || (TYPE_LANG_SPECIFIC (rhstype) && + (IS_SIGNATURE_POINTER (rhstype) + || IS_SIGNATURE_REFERENCE (rhstype))))) + { + error ("invalid assignment to signature pointer or reference"); + return error_mark_node; + } + + /* If SIG_TY is permanent, make the signature table constructor and + the signature pointer/reference constructor permanent too. */ + if (TREE_PERMANENT (sig_ty)) + { + current_obstack = &permanent_obstack; + saveable_obstack = &permanent_obstack; + } + + if (TYPE_LANG_SPECIFIC (rhstype) && + (IS_SIGNATURE_POINTER (rhstype) || IS_SIGNATURE_REFERENCE (rhstype))) + { + if (SIGNATURE_TYPE (rhstype) == sig_ty) + { + /* LHS and RHS are signature pointers/refs of the same signature. */ + optr_expr = build_optr_ref (rhs); + sptr_expr = build_sptr_ref (rhs); + vptr_expr = build_vptr_ref (rhs); + } + else + { + /* We need to create a new signature table and copy + elements from the rhs signature table. */ + tree rhs_sptr_ref = build_sptr_ref (rhs); + tree rhs_tbl = build1 (INDIRECT_REF, SIGNATURE_TYPE (rhstype), + rhs_sptr_ref); + + sig_tbl = build_sigtable (sig_ty, SIGNATURE_TYPE (rhstype), rhs_tbl); + if (sig_tbl == error_mark_node) + return error_mark_node; + + optr_expr = build_optr_ref (rhs); + if (sig_tbl == integer_zero_node) + sptr_expr = rhs_sptr_ref; + else + sptr_expr = build_unary_op (ADDR_EXPR, sig_tbl, 0); + TREE_TYPE (sptr_expr) = build_pointer_type (sig_ty); + vptr_expr = build_vptr_ref (rhs); + } + } + else + { + tree rhs_vptr; + + if (TYPE_USES_COMPLEX_INHERITANCE (TREE_TYPE (rhstype))) + { + sorry ("class with multiple inheritance as implementation of signature"); + return error_mark_node; + } + + sig_tbl = build_sigtable (sig_ty, TREE_TYPE (rhstype), rhs); + if (sig_tbl == error_mark_node) + return error_mark_node; + + optr_expr = rhs; + sptr_expr = build_unary_op (ADDR_EXPR, sig_tbl, 0); + if (CLASSTYPE_VFIELD (TREE_TYPE (rhstype))) + { + rhs_vptr = DECL_NAME (CLASSTYPE_VFIELD (TREE_TYPE (rhstype))); + vptr_expr = build_component_ref (build_indirect_ref (rhs, 0), + rhs_vptr, NULL_TREE, 0); + } + else + vptr_expr = null_pointer_node; + TREE_TYPE (vptr_expr) = build_pointer_type (vtbl_type_node); + } + + if (initp) + { + result = tree_cons (NULL_TREE, optr_expr, + tree_cons (NULL_TREE, sptr_expr, + build_tree_list (NULL_TREE, vptr_expr))); + result = build_nt (CONSTRUCTOR, NULL_TREE, result); + TREE_HAS_CONSTRUCTOR (result) = 1; + result = digest_init (lhstype, result, 0); + } + else + { + if (TREE_READONLY (lhs) || TYPE_READONLY (lhstype)) + readonly_error (lhs, "assignment", 0); + + optr_expr = build_modify_expr (build_optr_ref (lhs), NOP_EXPR, + optr_expr); + sptr_expr = build_modify_expr (build_sptr_ref (lhs), NOP_EXPR, + sptr_expr); + vptr_expr = build_modify_expr (build_vptr_ref (lhs), NOP_EXPR, + vptr_expr); + + result = tree_cons (NULL_TREE, optr_expr, + tree_cons (NULL_TREE, sptr_expr, + tree_cons (NULL_TREE, vptr_expr, + build_tree_list (NULL_TREE, + lhs)))); + result = build_compound_expr (result); + } + + current_obstack = ambient_obstack; + saveable_obstack = ambient_saveable_obstack; + return result; +} + +/* Build a temporary variable declaration for the instance of a signature + member function call if it isn't a declaration node already. Simply + using a SAVE_EXPR doesn't work since we need `this' in both branches + of a conditional expression. */ + +static tree +save_this (instance) + tree instance; +{ + tree decl; + + if (TREE_CODE_CLASS (TREE_CODE (instance)) == 'd') + decl = instance; + else + { + decl = build_decl (VAR_DECL, NULL_TREE, TREE_TYPE (instance)); + DECL_REGISTER (decl) = 1; + layout_decl (decl, 0); + expand_decl (decl); + } + + return decl; +} + +/* Build a signature member function call. Looks up the signature table + entry corresponding to FUNCTION. Depending on the value of the CODE + field, either call the function in PFN directly, or use OFFSET to + index INSTANCE's virtual function table. */ + +tree +build_signature_method_call (basetype, instance, function, parms) + tree basetype, instance, function, parms; +{ + tree saved_instance = save_this (instance); /* Create temp for `this'. */ + tree signature_tbl_ptr = build_sptr_ref (saved_instance); + tree sig_field_name = DECL_NAME (DECL_MEMFUNC_POINTER_TO (function)); + tree basetype_path = TYPE_BINFO (basetype); + tree tbl_entry = build_component_ref (build1 (INDIRECT_REF, basetype, + signature_tbl_ptr), + sig_field_name, basetype_path, 1); + tree code, offset, pfn, vfn; + tree deflt_call = NULL_TREE, direct_call, virtual_call, result; + + code = build_component_ref (tbl_entry, get_identifier (SIGTABLE_CODE_NAME), + NULL_TREE, 1); + offset = build_component_ref (tbl_entry, + get_identifier (SIGTABLE_OFFSET_NAME), + NULL_TREE, 1); + pfn = build_component_ref (tbl_entry, get_identifier (SIGTABLE_PFN_NAME), + NULL_TREE, 1); + TREE_TYPE (pfn) = build_pointer_type (TREE_TYPE (function)); + + if (IS_DEFAULT_IMPLEMENTATION (function)) + { + pfn = save_expr (pfn); + deflt_call = build_function_call (pfn, + tree_cons (NULL_TREE, saved_instance, + TREE_CHAIN (parms))); + } + + { + /* Cast the signature method to have `this' of a normal pointer type. */ + tree old_this = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (TREE_TYPE (pfn)))); + + TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (TREE_TYPE (pfn)))) = + build_type_variant (TYPE_POINTER_TO (basetype), + TYPE_READONLY (old_this), + TYPE_VOLATILE (old_this)); + + direct_call = build_function_call (pfn, parms); + + vfn = build_vfn_ref (&TREE_VALUE (parms), saved_instance, offset); + TREE_TYPE (vfn) = build_pointer_type (TREE_TYPE (function)); + virtual_call = build_function_call (vfn, parms); + + /* Undo the cast, make `this' a signature pointer again. */ + TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (TREE_TYPE (pfn)))) = old_this; + } + + /* Once the function was found, there should be no reason why we + couldn't build the member function pointer call. */ + if (!direct_call || direct_call == error_mark_node + || !virtual_call || virtual_call == error_mark_node + || (IS_DEFAULT_IMPLEMENTATION (function) + && (!deflt_call || deflt_call == error_mark_node))) + { + compiler_error ("cannot build call of signature member function `%s'", + fndecl_as_string (NULL, function, 1)); + return error_mark_node; + } + + if (IS_DEFAULT_IMPLEMENTATION (function)) + { + tree test = build_binary_op_nodefault (EQ_EXPR, code, integer_one_node, + EQ_EXPR); + result = build_conditional_expr (code, + build_conditional_expr (test, + virtual_call, + deflt_call), + direct_call); + } + else + result = build_conditional_expr (code, virtual_call, direct_call); + + /* If we created a temporary variable for `this', initialize it first. */ + if (instance != saved_instance) + result = build (COMPOUND_EXPR, TREE_TYPE (result), + build_modify_expr (saved_instance, NOP_EXPR, instance), + result); + + return result; +} + +/* Create a COMPONENT_REF expression for referencing the OPTR field + of a signature pointer or reference. */ + +tree +build_optr_ref (instance) + tree instance; +{ + tree field = get_identifier (SIGNATURE_OPTR_NAME); + + return build_component_ref (instance, field, NULL_TREE, 1); +} + +/* Create a COMPONENT_REF expression for referencing the SPTR field + of a signature pointer or reference. */ + +tree +build_sptr_ref (instance) + tree instance; +{ + tree field = get_identifier (SIGNATURE_SPTR_NAME); + + return build_component_ref (instance, field, NULL_TREE, 1); +} + +/* Create a COMPONENT_REF expression for referencing the VPTR field + of a signature pointer or reference. */ + +tree +build_vptr_ref (instance) + tree instance; +{ + tree field = get_identifier (SIGNATURE_VPTR_NAME); + + return build_component_ref (instance, field, NULL_TREE, 1); +} diff --git a/gcc/cp/spew.c b/gcc/cp/spew.c new file mode 100644 index 0000000..211876e --- /dev/null +++ b/gcc/cp/spew.c @@ -0,0 +1,1141 @@ +/* Type Analyzer for GNU C++. + Copyright (C) 1987, 1989, 1992, 1993 Free Software Foundation, Inc. + Hacked... nay, bludgeoned... by Mark Eichin (eichin@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This file is the type analyzer for GNU C++. To debug it, define SPEW_DEBUG + when compiling cp-parse.c and cp-spew.c. */ + +#include "config.h" +#include <stdio.h> +#include "input.h" +#include "tree.h" +#include "lex.h" +#include "parse.h" +#include "cp-tree.h" +#include "flags.h" +#include "obstack.h" + +/* This takes a token stream that hasn't decided much about types and + tries to figure out as much as it can, with excessive lookahead and + backtracking. */ + +/* fifo of tokens recognized and available to parser. */ +struct token { + /* The values for YYCHAR will fit in a short. */ + short yychar; + short end_of_file; + YYSTYPE yylval; +}; + +static int do_aggr (); +static struct token frob_identifier (); +static struct token hack_scope (); +static tree hack_ptype (); +static tree hack_more_ids (); + +/* From cp-lex.c: */ +/* the declaration found for the last IDENTIFIER token read in. + yylex must look this up to detect typedefs, which get token type TYPENAME, + so it is left around in case the identifier is not a typedef but is + used in a context which makes it a reference to a variable. */ +extern tree lastiddecl; /* let our brains leak out here too */ +extern int yychar; /* the lookahead symbol */ +extern YYSTYPE yylval; /* the semantic value of the */ + /* lookahead symbol */ +extern int end_of_file; + +struct obstack token_obstack; +int first_token; + +#ifdef SPEW_DEBUG +int spew_debug = 0; +static unsigned int yylex_ctr = 0; +static int debug_yychar (); +#endif + +static char follows_typename[END_OF_SAVED_INPUT+1]; +static char follows_identifier[END_OF_SAVED_INPUT+1]; + +/* This is a hack!!! TEMPLATE_TYPE_SEEN_BEFORE_SCOPE consists of the name + * of the last template_type parsed in cp-parse.y if it is followed by a + * scope operator. It will be reset inside the next invocation of yylex(). + * This is used for recognizing nested types inside templates. + * - niklas@appli.se */ +tree template_type_seen_before_scope; + +/* Initialize token_obstack. Called once, from init_lex. */ +void +init_spew () +{ + static char *chars_following_identifier = ".+-|/%^!?:"; + short *ps; + static short toks_follow_ids[] = + { ASSIGN, RANGE, OROR, ANDAND, MIN_MAX, EQCOMPARE, + ARITHCOMPARE, LSHIFT, RSHIFT, UNARY, PLUSPLUS, MINUSMINUS, POINTSAT, + POINTSAT_STAR, DOT_STAR, CONSTANT, STRING, SIZEOF, ENUM, IF, + ELSE, WHILE, DO, FOR, SWITCH, CASE, DEFAULT, BREAK, CONTINUE, + RETURN, GOTO, ASM_KEYWORD, GCC_ASM_KEYWORD, TYPEOF, ALIGNOF, HEADOF, + CLASSOF, SIGOF, ATTRIBUTE, AGGR, VISSPEC, DELETE, RAISE, RERAISE, TRY, + EXCEPT, CATCH, THROW, ANSI_TRY, ANSI_THROW, DYNAMIC_CAST, TYPEID, + EXTERN_LANG_STRING, ALL, END_OF_SAVED_INPUT, -1 }; + static short toks_follow_types[] = + { IDENTIFIER, TYPENAME, SCOPED_TYPENAME, SCOPED_NAME, SCSPEC, + TYPESPEC, TYPE_QUAL, + ELLIPSIS, THIS, OPERATOR, TEMPLATE, SCOPE, START_DECLARATOR, + TYPENAME_COLON, PAREN_STAR_PAREN, TYPENAME_ELLIPSIS, PTYPENAME, + PRE_PARSED_FUNCTION_DECL, PRE_PARSED_CLASS_DECL, -1 }; + + gcc_obstack_init(&token_obstack); + + /* Initialize the arrays saying what tokens are definitely + (or possibly) valid following typenames and identifiers. */ + while (*chars_following_identifier) + follows_identifier[*chars_following_identifier++] = 1; + for (ps = toks_follow_ids; *ps != -1; ps++) + follows_identifier[*ps] = 1; + for (ps = toks_follow_types; *ps != -1; ps++) + follows_typename[*ps] = 1; +} + +#ifdef SPEW_DEBUG +/* Use functions for debugging... */ + +/* Return the number of tokens available on the fifo. */ +static int +num_tokens () +{ + return (obstack_object_size(&token_obstack)/sizeof(struct token)) + - first_token; +} + +/* Fetch the token N down the line from the head of the fifo. */ +static struct token* +nth_token (n) + int n; +{ + /* could just have this do slurp_ implicitly, but this way is easier + * to debug... */ + my_friendly_assert (n < num_tokens(), 298); + return ((struct token*)obstack_base(&token_obstack))+n+first_token; +} + +/* Add a token to the token fifo. */ +static void +add_token (t) + struct token* t; +{ + obstack_grow(&token_obstack,t,sizeof (struct token)); +} + +/* Consume the next token out of the fifo. */ +static void +consume_token() +{ + if (num_tokens() == 1) + { + obstack_free(&token_obstack, obstack_base (&token_obstack)); + first_token = 0; + } + else + first_token++; +} + +#else +/* ...otherwise use macros. */ + +#define num_tokens() \ + ((obstack_object_size(&token_obstack)/sizeof(struct token)) - first_token) + +#define nth_token(N) \ + (((struct token*)obstack_base(&token_obstack))+(N)+first_token) + +#define add_token(T) obstack_grow(&token_obstack, (T), sizeof (struct token)) + +#define consume_token() \ + (num_tokens() == 1 \ + ? (obstack_free (&token_obstack, obstack_base (&token_obstack)), \ + (first_token = 0)) \ + : first_token++) +#endif + +/* Pull in enough tokens from real_yylex that the queue is N long. */ + +static void +scan_tokens (n) + int n; +{ + int i; + struct token *tmp; + + /* We cannot read past certain tokens, so make sure we don't. */ + i = num_tokens (); + if (i > n) + return; + while (i-- > 0) + { + tmp = nth_token (i); + /* Never read past these characters: they might separate + the current input stream from one we save away later. */ + if (tmp->yychar == '{' || tmp->yychar == ':' || tmp->yychar == ';') + goto pad_tokens; + } + + while (num_tokens() <= n) + { + obstack_blank(&token_obstack,sizeof (struct token)); + tmp = ((struct token *)obstack_next_free (&token_obstack))-1; + tmp->yychar = real_yylex(); + tmp->end_of_file = end_of_file; + tmp->yylval = yylval; + end_of_file = 0; + if (tmp->yychar == '{' + || tmp->yychar == ':' + || tmp->yychar == ';') + { + pad_tokens: + while (num_tokens () <= n) + { + obstack_blank(&token_obstack,sizeof (struct token)); + tmp = ((struct token *)obstack_next_free (&token_obstack))-1; + tmp->yychar = EMPTY; + tmp->end_of_file = 0; + } + } + } +} + +/* Create room for N tokens at the front of the fifo. This is used + to insert new tokens into the stream ahead of the current token. */ + +static void +shift_tokens (n) + int n; +{ + if (first_token >= n) + first_token -= n; + else + { + int old_token_count = num_tokens (); + char *tmp; + + obstack_blank (&token_obstack, (n-first_token) * sizeof (struct token)); + if (old_token_count) + { + tmp = (char *)alloca ((num_tokens () + (n-first_token)) + * sizeof (struct token)); + /* This move does not rely on the system being able to handle + overlapping moves. */ + bcopy (nth_token (0), tmp, old_token_count * sizeof (struct token)); + bcopy (tmp, nth_token (n), old_token_count * sizeof (struct token)); + } + first_token = 0; + } +} + +static int +probe_obstack (h, obj, nlevels) + struct obstack *h; + tree obj; + unsigned int nlevels; +{ + register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */ + register struct _obstack_chunk* plp; /* point to previous chunk if any */ + + lp = (h)->chunk; + /* We use >= rather than > since the object cannot be exactly at + the beginning of the chunk but might be an empty object exactly + at the end of an adjacent chunk. */ + for (; nlevels != 0 && lp != 0 && ((tree)lp >= obj || (tree)lp->limit < obj); + nlevels -= 1) + { + plp = lp->prev; + lp = plp; + } + return nlevels != 0 && lp != 0; +} + +/* from cp-lex.c: */ +/* Value is 1 if we should try to make the next identifier look like a + typename (when it may be a local variable or a class variable). + Value is 0 if we treat this name in a default fashion. + Value is -1 if we must not see a type name. */ +extern int looking_for_typename; + +extern struct obstack *current_obstack, *saveable_obstack; + +int +yylex() +{ + struct token tmp_token; + tree trrr; + + retry: +#ifdef SPEW_DEBUG + if (spew_debug) + { + yylex_ctr ++; + fprintf(stderr, "\t\t## %d ##",yylex_ctr); + } +#endif + + /* This is a kludge for recognizing nested types in templates */ + if (template_type_seen_before_scope) + { + shift_tokens (2); /* Sync in hack_more_ids (yes, it's ugly) */ + nth_token (1)->yychar = SCOPE; + yylval.ttype = hack_more_ids (0, template_type_seen_before_scope); + template_type_seen_before_scope = 0; + if (!yylval.ttype) + { + /* Sync back again, leaving SCOPE on the token stream, because we + * failed to substitute the original SCOPE token with a + * SCOPED_TYPENAME. See rule "template_type" in cp-parse.y */ + consume_token (); + } + else + { + tree t = TREE_TYPE(yylval.ttype); + if (TREE_CODE(yylval.ttype) == SCOPE_REF && + t && TREE_CODE(t) == UNINSTANTIATED_P_TYPE) + yychar = SCOPED_NAME; + else + yychar = SCOPED_TYPENAME; +#ifdef SPEW_DEBUG + if (spew_debug) + debug_yychar(yychar); +#endif + return yychar; + } + } + + /* if we've got tokens, send them */ + if (num_tokens()) + { + tmp_token= *nth_token(0); + + /* TMP_TOKEN.YYLVAL.TTYPE may have been allocated on the wrong obstack. + If we don't find it in CURRENT_OBSTACK's current or immediately + previous chunk, assume it was and copy it to the current obstack. */ + if ((tmp_token.yychar == CONSTANT + || tmp_token.yychar == STRING) + && ! TREE_PERMANENT (tmp_token.yylval.ttype) + && ! probe_obstack (current_obstack, tmp_token.yylval.ttype, 2) + && ! probe_obstack (saveable_obstack, tmp_token.yylval.ttype, 2)) + tmp_token.yylval.ttype = copy_node (tmp_token.yylval.ttype); + } + else + { + /* if not, grab the next one and think about it */ + tmp_token.yychar = real_yylex (); + tmp_token.yylval = yylval; + tmp_token.end_of_file = end_of_file; + add_token(&tmp_token); + } + + /* many tokens just need to be returned. At first glance, all we + * have to do is send them back up, but some of them are needed to + * figure out local context. */ + switch(tmp_token.yychar) + { + case EMPTY: + /* This is a lexical no-op. */ + consume_token (); +#ifdef SPEW_DEBUG + if (spew_debug) + debug_yychar (tmp_token.yychar); +#endif + goto retry; + + case IDENTIFIER: + /* Note: this calls arbitrate_lookup. */ + trrr = lookup_name (tmp_token.yylval.ttype, -2); + if (trrr) + { + tmp_token.yychar = identifier_type (trrr); + switch (tmp_token.yychar) + { + case TYPENAME: + lastiddecl = identifier_typedecl_value (tmp_token.yylval.ttype); + if (lastiddecl == NULL_TREE) + lastiddecl = trrr; + break; + case IDENTIFIER: + lastiddecl = trrr; + break; + case PTYPENAME: + /* This is for cases like + template<class A> X<A>::operator[] ... + since "X" is (presumably) a PTYPENAME; we might want to + avoid seeing the entire thing as a type name, but X<A> + must be one. + + It might not work right if the thing after the :: + can be a typename nested in X<A>, but I don't think the + PT code would be up to dealing with that anyways. --KR */ + if (looking_for_typename == -1) + { + scan_tokens (2); + if (nth_token(1)->yychar == '<') + looking_for_typename = 0; + } + break; + default: + my_friendly_abort (101); + } + } + else + lastiddecl = trrr; + /* and fall through to... */ + case TYPENAME: + case PTYPENAME: + /* if (new_token) add_token (&tmp_token); */ + *nth_token(0) = tmp_token; + tmp_token = frob_identifier (); + if (looking_for_typename < 0) + { + tmp_token.yychar = IDENTIFIER; + lastiddecl = 0; + looking_for_typename = 0; + } + else if (lastiddecl && TREE_CODE (lastiddecl) == TYPE_DECL) + { + scan_tokens (2); + if (nth_token(0)->yychar == IDENTIFIER + && nth_token (1)->yychar != SCOPE) + looking_for_typename = -1; + else + looking_for_typename = 0; + goto finish_typename_processing; + } + else + looking_for_typename = 0; + break; + + case SCSPEC: + /* do_aggr needs to check if the previous token was RID_FRIEND, + so just increment first_token instead of calling consume_token. */ + first_token++; + goto finish_typename_processing; + case TYPESPEC: + consume_token (); + finish_typename_processing: + /* Now see if we should insert a START_DECLARATOR token. + Here are the cases caught: + + typespec ( * ID ) ( // ptr to function + typespec ( & ID ) ( // ref to function + typespec ( * ID ) [ // array of pointers + typespec ( & ID ) [ // array of references + + This is a terrible kludge. */ + + scan_tokens (2); + if (nth_token (0)->yychar == '(' + && (nth_token (1)->yychar == '*' + || nth_token (1)->yychar == '&')) + { + scan_tokens (5); + if (nth_token (3)->yychar == ')' + && (nth_token (4)->yychar == '(' + || nth_token (4)->yychar == '[' + || nth_token (4)->yychar == LEFT_RIGHT) + && (nth_token (2)->yychar == IDENTIFIER + || nth_token (2)->yychar == TYPENAME)) + { + shift_tokens (1); + nth_token (0)->yychar = START_DECLARATOR; + } + } + /* Extend to handle: + + typespec (ID::* qf)( // ptr to member function + typespec (ID::* qf)[ // array of ptr to member functions + + */ + if (nth_token (0)->yychar == '(' + && (nth_token (1)->yychar == IDENTIFIER + || nth_token (1)->yychar == TYPENAME)) + { + scan_tokens (7); + if (nth_token (2)->yychar == SCOPE + && nth_token (3)->yychar == '*' + && (nth_token (4)->yychar == IDENTIFIER + || nth_token (4)->yychar == TYPENAME) + && nth_token (5)->yychar == ')' + && (nth_token (6)->yychar == '(' + || nth_token (6)->yychar == '[' + || nth_token (6)->yychar == LEFT_RIGHT)) + { + shift_tokens (1); + nth_token (0)->yychar = START_DECLARATOR; + } + } + break; + +#if 0 + case '(': + /* Handle casts. We are looking for one of: + `( TYPENAME' followed by `)', or + `( TYPENAME *' followed by one of `[,*,&,)', or + `( TYPENAME &' followed by one of `[,*,&,)', or + `( TYPENAME [' followed by `]'. We are punting + generality on scanning casts to array types. */ + scan_tokens (4); + if (nth_token (1)->yychar == IDENTIFIER) + { + tree type = identifier_typedecl_value (nth_token (1)->yylval.ttype); + if (type) + switch (nth_token (2)->yychar) + { + default: + break; + } + } + break; + + case SCOPE: + /* if (new_token) add_token (&tmp_token); */ + *nth_token(0) = tmp_token; + tmp_token = hack_scope (); + break; +#endif + + case AGGR: + *nth_token(0) = tmp_token; + do_aggr (); + /* fall through to output... */ + case ENUM: + /* Set this again, in case we are rescanning. */ + looking_for_typename = 1; + /* fall through... */ + default: +#ifdef SPEW_DEBUG + if (spew_debug) + debug_yychar(tmp_token.yychar); +#endif + consume_token(); + yylval = tmp_token.yylval; + yychar = tmp_token.yychar; + end_of_file = tmp_token.end_of_file; + return tmp_token.yychar; + } + + if (tmp_token.yychar == SCOPED_TYPENAME) + { +#if 0 + tree t2 = resolve_scope_to_name (NULL_TREE, tmp_token.yylval.ttype); + if (t2 != NULL_TREE) + { + tmp_token.yylval.ttype = t2; + tmp_token.yychar = TYPENAME; + } + else + { + /* unwind? */ + } + } + else + { + /* couldn't get here, as is... */ +#endif + tmp_token.yychar = TYPENAME; + } + + yylval = tmp_token.yylval; + yychar = tmp_token.yychar; + end_of_file = tmp_token.end_of_file; +#ifdef SPEW_DEBUG + if (spew_debug) + debug_yychar(yychar); +#endif +/* consume_token(); */ /* already eaten by frob_identifier?... */ + return yychar; +} + +/* token[0] == AGGR (struct/union/enum) + * Thus, token[1] is either a TYPENAME or a TYPENAME_DEFN. + * If token[2] == '{' or ':' then it's TYPENAME_DEFN. + * It's also a definition if it's a forward declaration (as in 'struct Foo;') + * which we can tell lf token[2] == ';' *and* token[-1] != FRIEND. + */ +static int +do_aggr () +{ + int yc1, yc2; + + scan_tokens (2); + yc1 = nth_token (1)->yychar; + if (yc1 != TYPENAME && yc1 != IDENTIFIER && yc1 != PTYPENAME) + return 0; + yc2 = nth_token (2)->yychar; + if (yc2 == ';') + { + /* It's a forward declaration iff we were not preceded by 'friend'. */ + if (first_token > 0 && nth_token (-1)->yychar == SCSPEC + && nth_token (-1)->yylval.ttype == ridpointers[(int) RID_FRIEND]) + return 0; + } + else if (yc2 != '{' && yc2 != ':') + return 0; + + switch (yc1) + { + case TYPENAME: + nth_token (1)->yychar = TYPENAME_DEFN; + break; + case PTYPENAME: + nth_token (1)->yychar = PTYPENAME_DEFN; + break; + case IDENTIFIER: + nth_token (1)->yychar = IDENTIFIER_DEFN; + break; + default: + my_friendly_abort (102); + } + return 0; +} + +static struct token +frob_identifier () +{ + /* we could have a type, if it is followed by :: (if so, suck it all up); */ + /* we could have a ptypename; */ + /* we could have a normal identifier. */ + tree t1; + struct token rt; + + scan_tokens(1); + rt = *nth_token(0); + +#if 0 + if (nth_token(1)->yychar == '<') + { + t1 = hack_ptype(); /* suck up the whole thing */ + if (t1) + { + rt.yylval.ttype = t1; + rt.yychar = TYPENAME; + *nth_token(0) = rt; + } + /* else fall out bottom */ + } +#endif + + if (nth_token(1)->yychar == SCOPE) + { +#if 0 + t1 = hack_more_ids(0); + if (t1 && TREE_CODE(t1) == SCOPE_REF) +#else + t1 = hack_more_ids(0, nth_token (0)->yylval.ttype); + if (t1) +#endif + { + rt.yylval.ttype = t1; + rt.yychar = SCOPED_TYPENAME ; + return rt; + } + else + { + /* deal with types (enums?) in classes... */ + struct token *tok; + tree ta, tb; + scan_tokens(3); + + /* Have to check for a type conversion operator + to a nested type. */ + if (nth_token (2)->yychar == OPERATOR) + tok = nth_token (3); + else + tok = nth_token(2); + + if (tok->yychar == IDENTIFIER || tok->yychar == TYPENAME) + { + ta = build_parse_node (SCOPE_REF, + nth_token(0)->yylval.ttype, + tok->yylval.ttype); + tb = resolve_scope_to_name (NULL_TREE, ta); + + if (tb != NULL_TREE) + { + if (nth_token (2)->yychar == OPERATOR) + { + /* Have to keep these tokens around + so we can finish parsing the declaration. + What do we do for + + int foo::operator bar::baz (); + + where bar is a nested class in foo? */ + nth_token (3)->yychar = TYPENAME; + nth_token (3)->yylval.ttype = tb; + } + else + { + consume_token (); /* base type */ + consume_token (); /* SCOPE */ + consume_token (); /* member type */ + rt.yychar = TYPENAME; + rt.yylval.ttype = tb; + rt.end_of_file = tok->end_of_file; + return rt; + } + + } + } + /* else fall out bottom */ + } + } + + consume_token(); + return rt; +} + +/* When this function is called, nth_token(0) is the current + token we are scanning. This means that the next token we'll + scan is nth_token (1). Usually the next token we'll scan + is nth_token (0) (and the current token is in [yylval,yychar]). */ +tree +arbitrate_lookup (name, exp_decl, type_decl) + tree name, exp_decl, type_decl; +{ + int ch; + tree t; + char *assume; + + scan_tokens (3); + ch = nth_token (1)->yychar; + + switch (ch) + { + case '(': + case LEFT_RIGHT: + /* If we guessed wrong here, `build_functional_cast' can fix it. */ + return type_decl; + + case '=': + if (global_bindings_p ()) + /* Probably a default parameter. */ + return type_decl; + /* Probably not an initialization. */ + return exp_decl; + + case '[': + /* This needs special help because an expression inside the + brackets means nothing. */ + { + int i; + + for (i = 0; i < 42; i++) + { + int ith_yychar; + + scan_tokens (3+i); + ith_yychar = nth_token (2+i)->yychar; + + /* If we hit an undefined identifier, assume + the decl in arbitration is its type specifier. */ + if (ith_yychar == IDENTIFIER + && lookup_name (nth_token (2+i)->yylval.ttype, 0) == 0) + return type_decl; + else if (ith_yychar == ']') + { + /* There are only a few things we expect after a ']' + in a declarator. */ + i += 1; + scan_tokens (4+i); + ith_yychar = nth_token (2+i)->yychar; + + /* These are inconclusive. */ + if (ith_yychar == LEFT_RIGHT + || ith_yychar == '(' + || ith_yychar == '[' + || ith_yychar == ',') + continue; + /* stmt or decl? We'll probably never know. */ + else if (ith_yychar == ';') + goto warn_ambiguous; + + if (ith_yychar == '=') + { + if (nth_token (3+i)->yychar == '{') + return type_decl; + continue; + } + + /* Whatever it is, it looks like we're processing an expr. */ + return exp_decl; + } + } + goto warn_ambiguous; + } + + case ',': + case ';': + case '&': + case '<': + case '*': + case ']': + case ')': + case '>': + /* see if the next token looks like it wants to be part + of a declaration list or an expression list. */ + { + int i; + + /* Some heuristics: if we are inside a function definition, + prefer the local declaration. */ + if (! global_bindings_p ()) + { + if (IDENTIFIER_LOCAL_VALUE (name) == exp_decl) + return exp_decl; + if (IDENTIFIER_LOCAL_VALUE (name) != type_decl + && IDENTIFIER_CLASS_VALUE (name) == exp_decl) + return exp_decl; + } + /* If these symbols follow in a list, we know it's a list of + expressions. */ + if (follows_identifier[nth_token (2)->yychar]) + return exp_decl; + + /* If we see a id&, or id&) the we are probably in an argument list. */ + if (ch=='&' + && (nth_token (2)->yychar == ',' || nth_token (2)->yychar == ')')) + return type_decl; + + /* Look for the first identifier or other distinguishing token + we find in the next several tokens. */ + for (i = 0; i < 42; i++) + { + int ith_yychar; + + scan_tokens (3+i); + ith_yychar = nth_token (2+i)->yychar; + + if (ith_yychar == IDENTIFIER) + { + tree as_type = lookup_name (nth_token (2+i)->yylval.ttype, 1); + if (as_type && TREE_CODE (as_type) != TYPE_DECL) + return exp_decl; + /* An undeclared identifier or a typename means we're + probably looking at a typename. */ + return type_decl; + } + else if (ith_yychar == EMPTY + || follows_identifier[ith_yychar]) + return exp_decl; + else if (follows_typename[ith_yychar]) + return type_decl; + /* stmt or decl? We'll probably never know. */ + else if (ith_yychar == ';') + goto warn_ambiguous; + } + goto warn_ambiguous; + } + + default: + if (follows_identifier[ch]) + return exp_decl; + if (follows_typename[ch]) + return type_decl; + + /* Fall through... */ + warn_ambiguous: + if (ch == '[') + { + assume = "expression"; + t = exp_decl; + } + else + { + assume = "type"; + t = type_decl; + } + + warning ("name `%s' could be type or expression; compiler assuming %s", + IDENTIFIER_POINTER (DECL_NAME (t)), assume); + return t; + } +} + +/* now returns decl_node */ + +#if 0 +static tree +hack_ptype() +{ + /* when we get here, we know that [0] is a ptype and [1] is '<'. + * now we loop over simple parameters. */ + struct token this_param; + int n = 2; + tree tplist = 0; + tree tc; + scan_tokens(n+1); + + while((this_param = *nth_token(n)).yychar != '>') + { + /* if it is a type, add it to the list */ + tree thistype; + + switch(this_param.yychar) + { + case IDENTIFIER: + case TYPENAME: + case TYPESPEC: + break; + default: + return 0; + } + + thistype = this_param.yylval.ttype; + thistype = lookup_name(thistype, 1); + thistype = TREE_TYPE (thistype); + + if (tplist) + tplist = chainon (tplist, build_tree_list (NULL_TREE, thistype)); + else + tplist = build_tree_list(NULL_TREE, thistype); + + + /* then suck up the comma */ + n++; + scan_tokens(n+1); + this_param = *nth_token(n); + if (this_param.yychar == ',') + { + n++; + scan_tokens(n+1); + continue; + } + if (this_param.yychar == '>') + break; + return 0; + } + + /* once we're done, lookup_template_class -> identifier */ + tc = lookup_template_class (nth_token(0)->yylval.ttype,tplist); + /* then lookup_name on that to get a type, if there is one */ + tc = lookup_name (tc, 1); + if (tc) + { + int i; + /* don't actually eat the trailing '>'... we can replace it! */ + for (i=0; i<n; i++) + consume_token(); + /* IDENTIFIER_TYPE_VALUE (DECL_NAME (tc)) = */ + return DECL_NAME (tc); + } + return NULL_TREE; +} +#endif + +#if 0 +static tree +hack_more_ids (n) + int n; +{ + /* + * The recursion should probably do consume_tokens(), since once we've started + * down an IDENTIFIER SCOPE ... chain, we don't need to back-track - we just + * get as much as we can, make SCOPE_REF's out of it, and return it. + */ + struct token this_iter, this2_iter; + int tmp_y; + + scan_tokens(n+1); + this_iter = *nth_token(n); + + tmp_y = nth_token(n)->yychar; + if (tmp_y == IDENTIFIER || tmp_y == TYPENAME) + { + scan_tokens(n+2+2); + if (nth_token(n+1)->yychar == SCOPE) + { + if (nth_token(n+1+2)->yychar == SCOPE) + { + tree hmi; + + consume_token(); /* last IDENTIFIER (this_iter) */ + consume_token(); /* last SCOPE */ + this2_iter = *nth_token(n); + + hmi = hack_more_ids (n); + + if (hmi) + return build_parse_node (SCOPE_REF, this_iter.yylval.ttype, hmi); + consume_token(); /* last IDENTIFIER (this2_iter) */ + return build_parse_node (SCOPE_REF, this_iter.yylval.ttype, + this2_iter.yylval.ttype); + } + else + { + /* consume_token(); */ /* last IDENTIFIER */ + /* leave whatever else we got */ + /* return this_iter.yylval.ttype; */ + return NULL_TREE; + } + } + } + return NULL_TREE; /* @@ may need to backtrack */ +} +#else +/* niklas@appli.se says: I didn't understand how the code above was intended + * to work, so I rewrote it (also changed the interface a bit). This code + * dives down an IDENTIFIER/TYPENAME SCOPE ... chain as long as the parsed + * type prefix constitutes recognizable (by resolve_scope_to_name) types. + * Interface changed like this: + * 1. Takes an extra argument containing the name of the the type recognized + * so far. + * 2. Now returns the name of the type instead of a SCOPE_REF. */ +static tree +hack_more_ids(n, outer) + int n; + tree outer; +{ + int ch; + tree type, val, inner, outer_t; + + scan_tokens (n + 2); + if (nth_token (n + 1)->yychar != SCOPE + || ((ch = nth_token (n + 2)->yychar) != IDENTIFIER && ch != TYPENAME)) + return NULL_TREE; + + inner = nth_token(n+2)->yylval.ttype; + val = build_parse_node (SCOPE_REF, outer, inner); + outer_t = TREE_TYPE(outer); + if (outer_t && TREE_CODE(outer_t) == UNINSTANTIATED_P_TYPE) + { + tree t = make_lang_type (UNINSTANTIATED_P_TYPE); + tree id = inner; + tree d = build_lang_decl (TYPE_DECL, id, t); + + TYPE_NAME (t) = d; + TYPE_VALUES (t) = TYPE_VALUES(outer_t); + TYPE_CONTEXT(t) = outer_t; +/* + pushdecl_top_level (d); +*/ + pushdecl(d); + + type = val; + TREE_TYPE(type) = t; + } + else + { + type = resolve_scope_to_name (NULL_TREE, val); + if (type == NULL_TREE) + return NULL_TREE; + } + consume_token (); + consume_token (); + val = hack_more_ids (n, type); + if (! val) + consume_token (); + return val ? val : type; +} +#endif + +#if 0 +static struct token +hack_scope () +{ + /* we've got a :: - what follows is either a global var or a type. */ + /* hmm, template names can be in the global scope too... */ + tree t1; + struct token rt; + + scan_tokens(1); + if (nth_token(1)->yychar == IDENTIFIER) + { + /* @@ this is probably not right, but doesn't get hit yet */ + t1 = build_parse_node (SCOPE_REF, + NULL_TREE, /* to get "global" scope */ + hack_more_ids(0)); /* do some prefetching */ + rt.yylval.ttype = t1; + rt.yychar = /*SCOPED_*/TYPENAME; + return rt; + } + else + { + rt = *nth_token(0); + consume_token(); + return rt; + } +} +#endif + +/* + * Generations: + * + * PINST: PTYPE { saved_arg_count = arg_count($1) } + * '<' { arg_c = 0; } PARGS '>' + * ; + * PARG: TYPE + * | VALUE + * ; + * (of course the arg counting doesn't work for recursion... Do it right.) + * PARGS: PARG { assert(arg_c == saved_arg_count); } + * | PARG ',' PARGS { arg_c++; } + * ; + * ATYPE: PINST + * | TYPEID + * ; + * TYPE: ATYPE + * | ATYPE { basetype = $1; } '::' TYPEKIDS + * ; + * TYPEKIDS: TYPE { assert ($1 is a member of basetype); } + * | TYPEKIDS { basetype += $1} TYPE { assert( $3 is in basetype ); } + * ; + * + * + * state0: ; ATYPE + * TYPE '<': ac = args($0), base = CALL state1, state3 + * TYPE '::': base=$0, state3 + * else return TYPE + * state1: ; begin PARGS + * if(ac < list length) punt + * PARG ",": add to list, state1 + * PARG ">": add to list, return + * else unravel + * state3: ; begin TYPEKIDS + * TYPE: + */ + + +#ifdef SPEW_DEBUG +/* debug_yychar takes a yychar (token number) value and prints its name. */ +static int +debug_yychar (yy) + int yy; +{ + /* In cp-parse.y: */ + extern char *debug_yytranslate (); + + int i; + + if(yy<256) { + fprintf (stderr, "<%d: %c >\n", yy, yy); + return 0; + } + fprintf (stderr, "<%d:%s>\n", yy, debug_yytranslate (yy)); + return 1; +} + +#endif diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c new file mode 100644 index 0000000..4edcabc --- /dev/null +++ b/gcc/cp/tree.c @@ -0,0 +1,1797 @@ +/* Language-dependent node constructors for parse phase of GNU compiler. + Copyright (C) 1987, 1988, 1992, 1993 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "config.h" +#include <stdio.h> +#include "obstack.h" +#include "tree.h" +#include "cp-tree.h" +#include "flags.h" + +#define CEIL(x,y) (((x) + (y) - 1) / (y)) + +/* Return nonzero if REF is an lvalue valid for this language. + Lvalues can be assigned, unless they have TREE_READONLY. + Lvalues can have their address taken, unless they have DECL_REGISTER. */ + +int +lvalue_p (ref) + tree ref; +{ + register enum tree_code code = TREE_CODE (ref); + + if (language_lvalue_valid (ref)) + switch (code) + { + /* preincrements and predecrements are valid lvals, provided + what they refer to are valid lvals. */ + case PREINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case COMPONENT_REF: + case SAVE_EXPR: + return lvalue_p (TREE_OPERAND (ref, 0)); + + case STRING_CST: + return 1; + + case VAR_DECL: + if (TREE_READONLY (ref) && ! TREE_STATIC (ref) + && DECL_LANG_SPECIFIC (ref) + && DECL_IN_AGGR_P (ref)) + return 0; + case INDIRECT_REF: + case ARRAY_REF: + case PARM_DECL: + case RESULT_DECL: + case ERROR_MARK: + if (TREE_CODE (TREE_TYPE (ref)) != FUNCTION_TYPE + && TREE_CODE (TREE_TYPE (ref)) != METHOD_TYPE) + return 1; + break; + + case TARGET_EXPR: + case WITH_CLEANUP_EXPR: + return 1; + + case CALL_EXPR: + if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE + /* unary_complex_lvalue knows how to deal with this case. */ + || TREE_ADDRESSABLE (TREE_TYPE (ref))) + return 1; + break; + + /* A currently unresolved scope ref. */ + case SCOPE_REF: + my_friendly_abort (103); + case OFFSET_REF: + if (TREE_CODE (TREE_OPERAND (ref, 1)) == FUNCTION_DECL) + return 1; + if (TREE_CODE (TREE_OPERAND (ref, 1)) == VAR_DECL) + if (TREE_READONLY (ref) && ! TREE_STATIC (ref) + && DECL_LANG_SPECIFIC (ref) + && DECL_IN_AGGR_P (ref)) + return 0; + else + return 1; + break; + + case ADDR_EXPR: + /* ANSI C++ June 5 1992 WP 5.4.14. The result of a cast to a + reference is an lvalue. */ + if (TREE_CODE (TREE_TYPE (ref)) == REFERENCE_TYPE) + return 1; + break; + + case COND_EXPR: + return (lvalue_p (TREE_OPERAND (ref, 1)) + && lvalue_p (TREE_OPERAND (ref, 2))); + } + return 0; +} + +/* Return nonzero if REF is an lvalue valid for this language; + otherwise, print an error message and return zero. */ + +int +lvalue_or_else (ref, string) + tree ref; + char *string; +{ + int win = lvalue_p (ref); + if (! win) + error ("invalid lvalue in %s", string); + return win; +} + +/* INIT is a CALL_EXPR which needs info about its target. + TYPE is the type that this initialization should appear to have. + + Build an encapsulation of the initialization to perform + and return it so that it can be processed by language-independent + and language-specific expression expanders. + + If WITH_CLEANUP_P is nonzero, we build a cleanup for this expression. + Otherwise, cleanups are not built here. For example, when building + an initialization for a stack slot, since the called function handles + the cleanup, we would not want to do it here. */ +tree +build_cplus_new (type, init, with_cleanup_p) + tree type; + tree init; + int with_cleanup_p; +{ + tree slot = build (VAR_DECL, type); + tree rval = build (NEW_EXPR, type, + TREE_OPERAND (init, 0), TREE_OPERAND (init, 1), slot); + TREE_SIDE_EFFECTS (rval) = 1; + TREE_ADDRESSABLE (rval) = 1; + rval = build (TARGET_EXPR, type, slot, rval, 0); + TREE_SIDE_EFFECTS (rval) = 1; + TREE_ADDRESSABLE (rval) = 1; + + if (with_cleanup_p && TYPE_NEEDS_DESTRUCTOR (type)) + { + TREE_OPERAND (rval, 2) = error_mark_node; + rval = build (WITH_CLEANUP_EXPR, type, rval, 0, + build_delete (TYPE_POINTER_TO (type), + build_unary_op (ADDR_EXPR, slot, 0), + integer_two_node, + LOOKUP_NORMAL|LOOKUP_DESTRUCTOR, 0)); + TREE_SIDE_EFFECTS (rval) = 1; + TREE_ADDRESSABLE (rval) = 1; + } + return rval; +} + +/* Recursively search EXP for CALL_EXPRs that need cleanups and replace + these CALL_EXPRs with tree nodes that will perform the cleanups. */ + +tree +break_out_cleanups (exp) + tree exp; +{ + tree tmp = exp; + + if (TREE_CODE (tmp) == CALL_EXPR + && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (tmp))) + return build_cplus_new (TREE_TYPE (tmp), tmp, 1); + + while (TREE_CODE (tmp) == NOP_EXPR + || TREE_CODE (tmp) == CONVERT_EXPR + || TREE_CODE (tmp) == NON_LVALUE_EXPR) + { + if (TREE_CODE (TREE_OPERAND (tmp, 0)) == CALL_EXPR + && TYPE_NEEDS_DESTRUCTOR (TREE_TYPE (TREE_OPERAND (tmp, 0)))) + { + TREE_OPERAND (tmp, 0) + = build_cplus_new (TREE_TYPE (TREE_OPERAND (tmp, 0)), + TREE_OPERAND (tmp, 0), 1); + break; + } + else + tmp = TREE_OPERAND (tmp, 0); + } + return exp; +} + +/* Recursively perform a preorder search EXP for CALL_EXPRs, making + copies where they are found. Returns a deep copy all nodes transitively + containing CALL_EXPRs. */ + +tree +break_out_calls (exp) + tree exp; +{ + register tree t1, t2; + register enum tree_code code; + register int changed = 0; + register int i; + + if (exp == NULL_TREE) + return exp; + + code = TREE_CODE (exp); + + if (code == CALL_EXPR) + return copy_node (exp); + + /* Don't try and defeat a save_expr, as it should only be done once. */ + if (code == SAVE_EXPR) + return exp; + + switch (TREE_CODE_CLASS (code)) + { + default: + abort (); + + case 'c': /* a constant */ + case 't': /* a type node */ + case 'x': /* something random, like an identifier or an ERROR_MARK. */ + return exp; + + case 'd': /* A decl node */ + t1 = break_out_calls (DECL_INITIAL (exp)); + if (t1 != DECL_INITIAL (exp)) + { + exp = copy_node (exp); + DECL_INITIAL (exp) = t1; + } + return exp; + + case 'b': /* A block node */ + { + /* Don't know how to handle these correctly yet. Must do a + break_out_calls on all DECL_INITIAL values for local variables, + and also break_out_calls on all sub-blocks and sub-statements. */ + abort (); + } + return exp; + + case 'e': /* an expression */ + case 'r': /* a reference */ + case 's': /* an expression with side effects */ + for (i = tree_code_length[(int) code] - 1; i >= 0; i--) + { + t1 = break_out_calls (TREE_OPERAND (exp, i)); + if (t1 != TREE_OPERAND (exp, i)) + { + exp = copy_node (exp); + TREE_OPERAND (exp, i) = t1; + } + } + return exp; + + case '<': /* a comparison expression */ + case '2': /* a binary arithmetic expression */ + t2 = break_out_calls (TREE_OPERAND (exp, 1)); + if (t2 != TREE_OPERAND (exp, 1)) + changed = 1; + case '1': /* a unary arithmetic expression */ + t1 = break_out_calls (TREE_OPERAND (exp, 0)); + if (t1 != TREE_OPERAND (exp, 0)) + changed = 1; + if (changed) + { + if (tree_code_length[(int) code] == 1) + return build1 (code, TREE_TYPE (exp), t1); + else + return build (code, TREE_TYPE (exp), t1, t2); + } + return exp; + } + +} + +extern struct obstack *current_obstack; +extern struct obstack permanent_obstack, class_obstack; +extern struct obstack *saveable_obstack; + +/* Here is how primitive or already-canonicalized types' hash + codes are made. MUST BE CONSISTENT WITH tree.c !!! */ +#define TYPE_HASH(TYPE) ((HOST_WIDE_INT) (TYPE) & 0777777) + +/* Construct, lay out and return the type of methods belonging to class + BASETYPE and whose arguments are described by ARGTYPES and whose values + are described by RETTYPE. If each type exists already, reuse it. */ +tree +build_cplus_method_type (basetype, rettype, argtypes) + tree basetype, rettype, argtypes; +{ + register tree t; + tree ptype; + int hashcode; + + /* Make a node of the sort we want. */ + t = make_node (METHOD_TYPE); + + TYPE_METHOD_BASETYPE (t) = TYPE_MAIN_VARIANT (basetype); + TREE_TYPE (t) = rettype; + if (IS_SIGNATURE (basetype)) + ptype = build_signature_pointer_type (TYPE_MAIN_VARIANT (basetype), + TYPE_READONLY (basetype), + TYPE_VOLATILE (basetype)); + else + { + ptype = build_pointer_type (basetype); +#if 0 + /* it is wrong to flag the object the pointer points to as readonly + when flag_this_is_variable is 0. */ + ptype = build_type_variant (ptype, flag_this_is_variable <= 0, 0); +#else + ptype = build_type_variant (ptype, 0, 0); +#endif + } + /* The actual arglist for this function includes a "hidden" argument + which is "this". Put it into the list of argument types. */ + + argtypes = tree_cons (NULL_TREE, ptype, argtypes); + TYPE_ARG_TYPES (t) = argtypes; + TREE_SIDE_EFFECTS (argtypes) = 1; /* Mark first argtype as "artificial". */ + + /* If we already have such a type, use the old one and free this one. + Note that it also frees up the above cons cell if found. */ + hashcode = TYPE_HASH (basetype) + TYPE_HASH (rettype) + type_hash_list (argtypes); + t = type_hash_canon (hashcode, t); + + if (TYPE_SIZE (t) == 0) + layout_type (t); + + return t; +} + +tree +build_cplus_staticfn_type (basetype, rettype, argtypes) + tree basetype, rettype, argtypes; +{ + register tree t; + int hashcode; + + /* Make a node of the sort we want. */ + t = make_node (FUNCTION_TYPE); + + TYPE_METHOD_BASETYPE (t) = TYPE_MAIN_VARIANT (basetype); + TREE_TYPE (t) = rettype; + + /* The actual arglist for this function includes a "hidden" argument + which is "this". Put it into the list of argument types. */ + + TYPE_ARG_TYPES (t) = argtypes; + + /* If we already have such a type, use the old one and free this one. + Note that it also frees up the above cons cell if found. */ + hashcode = TYPE_HASH (basetype) + TYPE_HASH (rettype) + type_hash_list (argtypes); + t = type_hash_canon (hashcode, t); + + if (TYPE_SIZE (t) == 0) + layout_type (t); + + return t; +} + +tree +build_cplus_array_type (elt_type, index_type) + tree elt_type; + tree index_type; +{ + register struct obstack *ambient_obstack = current_obstack; + register struct obstack *ambient_saveable_obstack = saveable_obstack; + tree t; + + /* We need a new one. If both ELT_TYPE and INDEX_TYPE are permanent, + make this permanent too. */ + if (TREE_PERMANENT (elt_type) + && (index_type == 0 || TREE_PERMANENT (index_type))) + { + current_obstack = &permanent_obstack; + saveable_obstack = &permanent_obstack; + } + + t = build_array_type (elt_type, index_type); + + /* Push these needs up so that initialization takes place + more easily. */ + TYPE_NEEDS_CONSTRUCTING (t) = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type)); + TYPE_NEEDS_DESTRUCTOR (t) = TYPE_NEEDS_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type)); + current_obstack = ambient_obstack; + saveable_obstack = ambient_saveable_obstack; + return t; +} + +/* Add OFFSET to all base types of T. + + OFFSET, which is a type offset, is number of bytes. + + Note that we don't have to worry about having two paths to the + same base type, since this type owns its association list. */ +void +propagate_binfo_offsets (binfo, offset) + tree binfo; + tree offset; +{ + tree binfos = BINFO_BASETYPES (binfo); + int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + for (i = 0; i < n_baselinks; /* note increment is done in the loop. */) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + + if (TREE_VIA_VIRTUAL (base_binfo)) + i += 1; + else + { + int j; + tree base_binfos = BINFO_BASETYPES (base_binfo); + tree delta; + + for (j = i+1; j < n_baselinks; j++) + if (! TREE_VIA_VIRTUAL (TREE_VEC_ELT (binfos, j))) + { + /* The next basetype offset must take into account the space + between the classes, not just the size of each class. */ + delta = size_binop (MINUS_EXPR, + BINFO_OFFSET (TREE_VEC_ELT (binfos, j)), + BINFO_OFFSET (base_binfo)); + break; + } + +#if 0 + if (BINFO_OFFSET_ZEROP (base_binfo)) + BINFO_OFFSET (base_binfo) = offset; + else + BINFO_OFFSET (base_binfo) + = size_binop (PLUS_EXPR, BINFO_OFFSET (base_binfo), offset); +#else + BINFO_OFFSET (base_binfo) = offset; +#endif + if (base_binfos) + { + int k; + tree chain = NULL_TREE; + + /* Now unshare the structure beneath BASE_BINFO. */ + for (k = TREE_VEC_LENGTH (base_binfos)-1; + k >= 0; k--) + { + tree base_base_binfo = TREE_VEC_ELT (base_binfos, k); + if (! TREE_VIA_VIRTUAL (base_base_binfo)) + TREE_VEC_ELT (base_binfos, k) + = make_binfo (BINFO_OFFSET (base_base_binfo), + BINFO_TYPE (base_base_binfo), + BINFO_VTABLE (base_base_binfo), + BINFO_VIRTUALS (base_base_binfo), + chain); + chain = TREE_VEC_ELT (base_binfos, k); + TREE_VIA_PUBLIC (chain) = TREE_VIA_PUBLIC (base_base_binfo); + TREE_VIA_PROTECTED (chain) = TREE_VIA_PROTECTED (base_base_binfo); + } + /* Now propagate the offset to the base types. */ + propagate_binfo_offsets (base_binfo, offset); + } + + /* Go to our next class that counts for offset propagation. */ + i = j; + if (i < n_baselinks) + offset = size_binop (PLUS_EXPR, offset, delta); + } + } +} + +/* Compute the actual offsets that our virtual base classes + will have *for this type*. This must be performed after + the fields are laid out, since virtual baseclasses must + lay down at the end of the record. + + Returns the maximum number of virtual functions any of the virtual + baseclasses provide. */ +int +layout_vbasetypes (rec, max) + tree rec; + int max; +{ + /* Get all the virtual base types that this type uses. + The TREE_VALUE slot holds the virtual baseclass type. */ + tree vbase_types = get_vbase_types (rec); + +#ifdef STRUCTURE_SIZE_BOUNDARY + unsigned record_align = MAX (STRUCTURE_SIZE_BOUNDARY, TYPE_ALIGN (rec)); +#else + unsigned record_align = MAX (BITS_PER_UNIT, TYPE_ALIGN (rec)); +#endif + + /* Record size so far is CONST_SIZE + VAR_SIZE bits, + where CONST_SIZE is an integer + and VAR_SIZE is a tree expression. + If VAR_SIZE is null, the size is just CONST_SIZE. + Naturally we try to avoid using VAR_SIZE. */ + register unsigned const_size = 0; + register tree var_size = 0; + int nonvirtual_const_size; + tree nonvirtual_var_size; + + CLASSTYPE_VBASECLASSES (rec) = vbase_types; + + if (TREE_CODE (TYPE_SIZE (rec)) == INTEGER_CST) + const_size = TREE_INT_CST_LOW (TYPE_SIZE (rec)); + else + var_size = TYPE_SIZE (rec); + + nonvirtual_const_size = const_size; + nonvirtual_var_size = var_size; + + while (vbase_types) + { + tree basetype = BINFO_TYPE (vbase_types); + tree offset; + + if (const_size == 0) + offset = integer_zero_node; + else + offset = size_int ((const_size + BITS_PER_UNIT - 1) / BITS_PER_UNIT); + + if (CLASSTYPE_VSIZE (basetype) > max) + max = CLASSTYPE_VSIZE (basetype); + BINFO_OFFSET (vbase_types) = offset; + + if (TREE_CODE (TYPE_SIZE (basetype)) == INTEGER_CST) + const_size += MAX (record_align, + TREE_INT_CST_LOW (TYPE_SIZE (basetype)) + - TREE_INT_CST_LOW (CLASSTYPE_VBASE_SIZE (basetype))); + else if (var_size == 0) + var_size = TYPE_SIZE (basetype); + else + var_size = size_binop (PLUS_EXPR, var_size, TYPE_SIZE (basetype)); + + vbase_types = TREE_CHAIN (vbase_types); + } + + if (const_size != nonvirtual_const_size) + { + CLASSTYPE_VBASE_SIZE (rec) + = size_int (const_size - nonvirtual_const_size); + TYPE_SIZE (rec) = size_int (const_size); + } + + /* Now propagate offset information throughout the lattice + under the vbase type. */ + for (vbase_types = CLASSTYPE_VBASECLASSES (rec); vbase_types; + vbase_types = TREE_CHAIN (vbase_types)) + { + tree base_binfos = BINFO_BASETYPES (vbase_types); + + if (base_binfos) + { + tree chain = NULL_TREE; + int j; + /* Now unshare the structure beneath BASE_BINFO. */ + + for (j = TREE_VEC_LENGTH (base_binfos)-1; + j >= 0; j--) + { + tree base_base_binfo = TREE_VEC_ELT (base_binfos, j); + if (! TREE_VIA_VIRTUAL (base_base_binfo)) + TREE_VEC_ELT (base_binfos, j) + = make_binfo (BINFO_OFFSET (base_base_binfo), + BINFO_TYPE (base_base_binfo), + BINFO_VTABLE (base_base_binfo), + BINFO_VIRTUALS (base_base_binfo), + chain); + chain = TREE_VEC_ELT (base_binfos, j); + TREE_VIA_PUBLIC (chain) = TREE_VIA_PUBLIC (base_base_binfo); + TREE_VIA_PROTECTED (chain) = TREE_VIA_PROTECTED (base_base_binfo); + } + + propagate_binfo_offsets (vbase_types, BINFO_OFFSET (vbase_types)); + } + } + + return max; +} + +/* Lay out the base types of a record type, REC. + Tentatively set the size and alignment of REC + according to the base types alone. + + Offsets for immediate nonvirtual baseclasses are also computed here. + + Returns list of virtual base classes in a FIELD_DECL chain. */ +tree +layout_basetypes (rec, binfos) + tree rec, binfos; +{ + /* Chain to hold all the new FIELD_DECLs which point at virtual + base classes. */ + tree vbase_decls = NULL_TREE; + +#ifdef STRUCTURE_SIZE_BOUNDARY + unsigned record_align = MAX (STRUCTURE_SIZE_BOUNDARY, TYPE_ALIGN (rec)); +#else + unsigned record_align = MAX (BITS_PER_UNIT, TYPE_ALIGN (rec)); +#endif + + /* Record size so far is CONST_SIZE + VAR_SIZE bits, + where CONST_SIZE is an integer + and VAR_SIZE is a tree expression. + If VAR_SIZE is null, the size is just CONST_SIZE. + Naturally we try to avoid using VAR_SIZE. */ + register unsigned const_size = 0; + register tree var_size = 0; + int i, n_baseclasses = binfos ? TREE_VEC_LENGTH (binfos) : 0; + + /* Handle basetypes almost like fields, but record their + offsets differently. */ + + for (i = 0; i < n_baseclasses; i++) + { + int inc, desired_align, int_vbase_size; + register tree base_binfo = TREE_VEC_ELT (binfos, i); + register tree basetype = BINFO_TYPE (base_binfo); + tree decl, offset; + + if (TYPE_SIZE (basetype) == 0) + { +#if 0 + /* This error is now reported in xref_tag, thus giving better + location information. */ + error_with_aggr_type (base_binfo, + "base class `%s' has incomplete type"); + + TREE_VIA_PUBLIC (base_binfo) = 1; + TREE_VIA_PROTECTED (base_binfo) = 0; + TREE_VIA_VIRTUAL (base_binfo) = 0; + + /* Should handle this better so that + + class A; + class B: private A { virtual void F(); }; + + does not dump core when compiled. */ + my_friendly_abort (121); +#endif + continue; + } + + /* All basetypes are recorded in the association list of the + derived type. */ + + if (TREE_VIA_VIRTUAL (base_binfo)) + { + int j; + char *name = (char *)alloca (TYPE_NAME_LENGTH (basetype) + + sizeof (VBASE_NAME) + 1); + + /* The offset for a virtual base class is only used in computing + virtual function tables and for initializing virtual base + pointers. It is built once `get_vbase_types' is called. */ + + /* If this basetype can come from another vbase pointer + without an additional indirection, we will share + that pointer. If an indirection is involved, we + make our own pointer. */ + for (j = 0; j < n_baseclasses; j++) + { + tree other_base_binfo = TREE_VEC_ELT (binfos, j); + if (! TREE_VIA_VIRTUAL (other_base_binfo) + && binfo_member (basetype, + CLASSTYPE_VBASECLASSES (BINFO_TYPE (other_base_binfo)))) + goto got_it; + } + sprintf (name, VBASE_NAME_FORMAT, TYPE_NAME_STRING (basetype)); + decl = build_lang_decl (FIELD_DECL, get_identifier (name), + build_pointer_type (basetype)); + /* If you change any of the below, take a look at all the + other VFIELD_BASEs and VTABLE_BASEs in the code, and change + them too. */ + DECL_ASSEMBLER_NAME (decl) = get_identifier (VTABLE_BASE); + DECL_VIRTUAL_P (decl) = 1; + DECL_FIELD_CONTEXT (decl) = rec; + DECL_CLASS_CONTEXT (decl) = rec; + DECL_FCONTEXT (decl) = basetype; + DECL_FIELD_SIZE (decl) = 0; + DECL_ALIGN (decl) = TYPE_ALIGN (ptr_type_node); + TREE_CHAIN (decl) = vbase_decls; + BINFO_VPTR_FIELD (base_binfo) = decl; + vbase_decls = decl; + + if (warn_nonvdtor && TYPE_HAS_DESTRUCTOR (basetype) + && DECL_VINDEX (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0)) == NULL_TREE) + { + warning_with_decl (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0), + "destructor `%s' non-virtual"); + warning ("in inheritance relationship `%s: virtual %s'", + TYPE_NAME_STRING (rec), + TYPE_NAME_STRING (basetype)); + } + got_it: + /* The space this decl occupies has already been accounted for. */ + continue; + } + + if (const_size == 0) + offset = integer_zero_node; + else + { + /* Give each base type the alignment it wants. */ + const_size = CEIL (const_size, TYPE_ALIGN (basetype)) + * TYPE_ALIGN (basetype); + offset = size_int ((const_size + BITS_PER_UNIT - 1) / BITS_PER_UNIT); + +#if 0 + /* bpk: Disabled this check until someone is willing to + claim it as theirs and explain exactly what circumstances + warrant the warning. */ + if (warn_nonvdtor && TYPE_HAS_DESTRUCTOR (basetype) + && DECL_VINDEX (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0)) == NULL_TREE) + { + warning_with_decl (TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0), + "destructor `%s' non-virtual"); + warning ("in inheritance relationship `%s:%s %s'", + TYPE_NAME_STRING (rec), + TREE_VIA_VIRTUAL (base_binfo) ? " virtual" : "", + TYPE_NAME_STRING (basetype)); + } +#endif + } + BINFO_OFFSET (base_binfo) = offset; + if (CLASSTYPE_VSIZE (basetype)) + { + BINFO_VTABLE (base_binfo) = TYPE_BINFO_VTABLE (basetype); + BINFO_VIRTUALS (base_binfo) = TYPE_BINFO_VIRTUALS (basetype); + } + TREE_CHAIN (base_binfo) = TYPE_BINFO (rec); + TYPE_BINFO (rec) = base_binfo; + + /* Add only the amount of storage not present in + the virtual baseclasses. */ + + int_vbase_size = TREE_INT_CST_LOW (CLASSTYPE_VBASE_SIZE (basetype)); + if (TREE_INT_CST_LOW (TYPE_SIZE (basetype)) > int_vbase_size) + { + inc = MAX (record_align, + (TREE_INT_CST_LOW (TYPE_SIZE (basetype)) + - int_vbase_size)); + + /* Record must have at least as much alignment as any field. */ + desired_align = TYPE_ALIGN (basetype); + record_align = MAX (record_align, desired_align); + + const_size += inc; + } + } + + if (const_size) + CLASSTYPE_SIZE (rec) = size_int (const_size); + else + CLASSTYPE_SIZE (rec) = integer_zero_node; + CLASSTYPE_ALIGN (rec) = record_align; + + return vbase_decls; +} + +/* Hashing of lists so that we don't make duplicates. + The entry point is `list_hash_canon'. */ + +/* Each hash table slot is a bucket containing a chain + of these structures. */ + +struct list_hash +{ + struct list_hash *next; /* Next structure in the bucket. */ + int hashcode; /* Hash code of this list. */ + tree list; /* The list recorded here. */ +}; + +/* Now here is the hash table. When recording a list, it is added + to the slot whose index is the hash code mod the table size. + Note that the hash table is used for several kinds of lists. + While all these live in the same table, they are completely independent, + and the hash code is computed differently for each of these. */ + +#define TYPE_HASH_SIZE 59 +struct list_hash *list_hash_table[TYPE_HASH_SIZE]; + +/* Compute a hash code for a list (chain of TREE_LIST nodes + with goodies in the TREE_PURPOSE, TREE_VALUE, and bits of the + TREE_COMMON slots), by adding the hash codes of the individual entries. */ + +int +list_hash (list) + tree list; +{ + register int hashcode = 0; + + if (TREE_CHAIN (list)) + hashcode += TYPE_HASH (TREE_CHAIN (list)); + + if (TREE_VALUE (list)) + hashcode += TYPE_HASH (TREE_VALUE (list)); + else + hashcode += 1007; + if (TREE_PURPOSE (list)) + hashcode += TYPE_HASH (TREE_PURPOSE (list)); + else + hashcode += 1009; + return hashcode; +} + +/* Look in the type hash table for a type isomorphic to TYPE. + If one is found, return it. Otherwise return 0. */ + +tree +list_hash_lookup (hashcode, list) + int hashcode; + tree list; +{ + register struct list_hash *h; + for (h = list_hash_table[hashcode % TYPE_HASH_SIZE]; h; h = h->next) + if (h->hashcode == hashcode + && TREE_VIA_VIRTUAL (h->list) == TREE_VIA_VIRTUAL (list) + && TREE_VIA_PUBLIC (h->list) == TREE_VIA_PUBLIC (list) + && TREE_VIA_PROTECTED (h->list) == TREE_VIA_PROTECTED (list) + && TREE_PURPOSE (h->list) == TREE_PURPOSE (list) + && TREE_VALUE (h->list) == TREE_VALUE (list) + && TREE_CHAIN (h->list) == TREE_CHAIN (list)) + { + my_friendly_assert (TREE_TYPE (h->list) == TREE_TYPE (list), 299); + return h->list; + } + return 0; +} + +/* Add an entry to the list-hash-table + for a list TYPE whose hash code is HASHCODE. */ + +void +list_hash_add (hashcode, list) + int hashcode; + tree list; +{ + register struct list_hash *h; + + h = (struct list_hash *) obstack_alloc (&class_obstack, sizeof (struct list_hash)); + h->hashcode = hashcode; + h->list = list; + h->next = list_hash_table[hashcode % TYPE_HASH_SIZE]; + list_hash_table[hashcode % TYPE_HASH_SIZE] = h; +} + +/* Given TYPE, and HASHCODE its hash code, return the canonical + object for an identical list if one already exists. + Otherwise, return TYPE, and record it as the canonical object + if it is a permanent object. + + To use this function, first create a list of the sort you want. + Then compute its hash code from the fields of the list that + make it different from other similar lists. + Then call this function and use the value. + This function frees the list you pass in if it is a duplicate. */ + +/* Set to 1 to debug without canonicalization. Never set by program. */ +int debug_no_list_hash = 0; + +tree +list_hash_canon (hashcode, list) + int hashcode; + tree list; +{ + tree t1; + + if (debug_no_list_hash) + return list; + + t1 = list_hash_lookup (hashcode, list); + if (t1 != 0) + { + obstack_free (&class_obstack, list); + return t1; + } + + /* If this is a new list, record it for later reuse. */ + list_hash_add (hashcode, list); + + return list; +} + +tree +hash_tree_cons (via_public, via_virtual, via_protected, purpose, value, chain) + int via_public, via_virtual, via_protected; + tree purpose, value, chain; +{ + struct obstack *ambient_obstack = current_obstack; + tree t; + int hashcode; + + current_obstack = &class_obstack; + t = tree_cons (purpose, value, chain); + TREE_VIA_PUBLIC (t) = via_public; + TREE_VIA_PROTECTED (t) = via_protected; + TREE_VIA_VIRTUAL (t) = via_virtual; + hashcode = list_hash (t); + t = list_hash_canon (hashcode, t); + current_obstack = ambient_obstack; + return t; +} + +/* Constructor for hashed lists. */ +tree +hash_tree_chain (value, chain) + tree value, chain; +{ + struct obstack *ambient_obstack = current_obstack; + tree t; + int hashcode; + + current_obstack = &class_obstack; + t = tree_cons (NULL_TREE, value, chain); + hashcode = list_hash (t); + t = list_hash_canon (hashcode, t); + current_obstack = ambient_obstack; + return t; +} + +/* Similar, but used for concatenating two lists. */ +tree +hash_chainon (list1, list2) + tree list1, list2; +{ + if (list2 == 0) + return list1; + if (list1 == 0) + return list2; + if (TREE_CHAIN (list1) == NULL_TREE) + return hash_tree_chain (TREE_VALUE (list1), list2); + return hash_tree_chain (TREE_VALUE (list1), + hash_chainon (TREE_CHAIN (list1), list2)); +} + +tree +get_decl_list (value) + tree value; +{ + tree list = NULL_TREE; + + if (TREE_CODE (value) == IDENTIFIER_NODE) + { + list = IDENTIFIER_AS_LIST (value); + if (list != NULL_TREE + && (TREE_CODE (list) != TREE_LIST + || TREE_VALUE (list) != value)) + list = NULL_TREE; + else if (IDENTIFIER_HAS_TYPE_VALUE (value) + && TREE_CODE (IDENTIFIER_TYPE_VALUE (value)) == RECORD_TYPE) + { + register tree id; + tree type = IDENTIFIER_TYPE_VALUE (value); + + if (TYPE_PTRMEMFUNC_P (type)) + list = NULL_TREE; + else + { + /* This will return the correct thing for regular types, + nested types, and templates. Yay! */ + if (DECL_NESTED_TYPENAME (TYPE_NAME (type))) + value = DECL_NESTED_TYPENAME (TYPE_NAME (type)); + id = value; + + if (CLASSTYPE_ID_AS_LIST (type) == NULL_TREE) + CLASSTYPE_ID_AS_LIST (type) = perm_tree_cons (NULL_TREE, + id, NULL_TREE); + list = CLASSTYPE_ID_AS_LIST (type); + } + } + } + else if (TREE_CODE (value) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (value)) + list = CLASSTYPE_AS_LIST (value); + + if (list != NULL_TREE) + { + my_friendly_assert (TREE_CHAIN (list) == NULL_TREE, 301); + return list; + } + + return build_decl_list (NULL_TREE, value); +} + +/* Look in the type hash table for a type isomorphic to + `build_tree_list (NULL_TREE, VALUE)'. + If one is found, return it. Otherwise return 0. */ + +tree +list_hash_lookup_or_cons (value) + tree value; +{ + register int hashcode = TYPE_HASH (value); + register struct list_hash *h; + struct obstack *ambient_obstack; + tree list = NULL_TREE; + + if (TREE_CODE (value) == IDENTIFIER_NODE) + { + list = IDENTIFIER_AS_LIST (value); + if (list != NULL_TREE + && (TREE_CODE (list) != TREE_LIST + || TREE_VALUE (list) != value)) + list = NULL_TREE; + else if (IDENTIFIER_HAS_TYPE_VALUE (value) + && TREE_CODE (IDENTIFIER_TYPE_VALUE (value)) == RECORD_TYPE) + { + /* If the type name and constructor name are different, don't + write constructor name into type. */ + if (identifier_typedecl_value (value) + && identifier_typedecl_value (value) != constructor_name (value)) + list = tree_cons (NULL_TREE, value, NULL_TREE); + else + { + tree type = IDENTIFIER_TYPE_VALUE (value); + if (TYPE_PTRMEMFUNC_P (type)) + list = NULL_TREE; + else + { + if (CLASSTYPE_ID_AS_LIST (type) == NULL_TREE) + { + /* Not just `value', which could be a template parm. */ + tree id = DECL_NAME (TYPE_NAME (type)); + CLASSTYPE_ID_AS_LIST (type) = + perm_tree_cons (NULL_TREE, id, NULL_TREE); + } + list = CLASSTYPE_ID_AS_LIST (type); + } + } + } + } + else if (TREE_CODE (value) == TYPE_DECL + && TREE_CODE (TREE_TYPE (value)) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (TREE_TYPE (value))) + list = CLASSTYPE_ID_AS_LIST (TREE_TYPE (value)); + else if (TREE_CODE (value) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (value)) + list = CLASSTYPE_AS_LIST (value); + + if (list != NULL_TREE) + { + my_friendly_assert (TREE_CHAIN (list) == NULL_TREE, 302); + return list; + } + + if (debug_no_list_hash) + return hash_tree_chain (value, NULL_TREE); + + for (h = list_hash_table[hashcode % TYPE_HASH_SIZE]; h; h = h->next) + if (h->hashcode == hashcode + && TREE_VIA_VIRTUAL (h->list) == 0 + && TREE_VIA_PUBLIC (h->list) == 0 + && TREE_VIA_PROTECTED (h->list) == 0 + && TREE_PURPOSE (h->list) == 0 + && TREE_VALUE (h->list) == value) + { + my_friendly_assert (TREE_TYPE (h->list) == 0, 303); + my_friendly_assert (TREE_CHAIN (h->list) == 0, 304); + return h->list; + } + + ambient_obstack = current_obstack; + current_obstack = &class_obstack; + list = build_tree_list (NULL_TREE, value); + list_hash_add (hashcode, list); + current_obstack = ambient_obstack; + return list; +} + +/* Build an association between TYPE and some parameters: + + OFFSET is the offset added to `this' to convert it to a pointer + of type `TYPE *' + + VTABLE is the virtual function table with which to initialize + sub-objects of type TYPE. + + VIRTUALS are the virtual functions sitting in VTABLE. + + CHAIN are more associations we must retain. */ + +tree +make_binfo (offset, type, vtable, virtuals, chain) + tree offset, type; + tree vtable, virtuals; + tree chain; +{ + tree binfo = make_tree_vec (6); + tree old_binfo = TYPE_BINFO (type); + tree last; + + TREE_CHAIN (binfo) = chain; + if (chain) + TREE_USED (binfo) = TREE_USED (chain); + + TREE_TYPE (binfo) = TYPE_MAIN_VARIANT (type); + BINFO_OFFSET (binfo) = offset; + BINFO_VTABLE (binfo) = vtable; + BINFO_VIRTUALS (binfo) = virtuals; + BINFO_VPTR_FIELD (binfo) = NULL_TREE; + + last = binfo; + if (old_binfo != NULL_TREE + && BINFO_BASETYPES (old_binfo) != NULL_TREE) + { + int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (type); + tree binfos = TYPE_BINFO_BASETYPES (type); + + BINFO_BASETYPES (binfo) = make_tree_vec (n_baseclasses); + for (i = 0; i < n_baseclasses; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree old_base_binfo = old_binfo ? BINFO_BASETYPE (old_binfo, i) : 0; + BINFO_BASETYPE (binfo, i) = base_binfo; + if (old_binfo) + { + TREE_VIA_PUBLIC (base_binfo) = TREE_VIA_PUBLIC (old_base_binfo); + TREE_VIA_PROTECTED (base_binfo) = TREE_VIA_PROTECTED (old_base_binfo); + TREE_VIA_VIRTUAL (base_binfo) = TREE_VIA_VIRTUAL (old_base_binfo); + } + } + } + return binfo; +} + +tree +copy_binfo (list) + tree list; +{ + tree binfo = copy_list (list); + tree rval = binfo; + while (binfo) + { + TREE_USED (binfo) = 0; + if (BINFO_BASETYPES (binfo)) + BINFO_BASETYPES (binfo) = copy_node (BINFO_BASETYPES (binfo)); + binfo = TREE_CHAIN (binfo); + } + return rval; +} + +/* Return the binfo value for ELEM in TYPE. */ + +tree +binfo_value (elem, type) + tree elem; + tree type; +{ + if (get_base_distance (elem, type, 0, (tree *)0) == -2) + compiler_error ("base class `%s' ambiguous in binfo_value", + TYPE_NAME_STRING (elem)); + if (elem == type) + return TYPE_BINFO (type); + if (TREE_CODE (elem) == RECORD_TYPE && TYPE_BINFO (elem) == type) + return type; + return get_binfo (elem, type, 0); +} + +tree +reverse_path (path) + tree path; +{ + register tree prev = 0, tmp, next; + for (tmp = path; tmp; tmp = next) + { + next = BINFO_INHERITANCE_CHAIN (tmp); + BINFO_INHERITANCE_CHAIN (tmp) = prev; + prev = tmp; + } + return prev; +} + +tree +virtual_member (elem, list) + tree elem; + tree list; +{ + tree t; + tree rval, nval; + + for (t = list; t; t = TREE_CHAIN (t)) + if (elem == BINFO_TYPE (t)) + return t; + rval = 0; + for (t = list; t; t = TREE_CHAIN (t)) + { + tree binfos = BINFO_BASETYPES (t); + int i; + + if (binfos != NULL_TREE) + for (i = TREE_VEC_LENGTH (binfos)-1; i >= 0; i--) + { + nval = binfo_value (elem, BINFO_TYPE (TREE_VEC_ELT (binfos, i))); + if (nval) + { + if (rval && BINFO_OFFSET (nval) != BINFO_OFFSET (rval)) + my_friendly_abort (104); + rval = nval; + } + } + } + return rval; +} + +/* Return the offset (as an INTEGER_CST) for ELEM in LIST. + INITIAL_OFFSET is the value to add to the offset that ELEM's + binfo entry in LIST provides. + + Returns NULL if ELEM does not have an binfo value in LIST. */ + +tree +virtual_offset (elem, list, initial_offset) + tree elem; + tree list; + tree initial_offset; +{ + tree vb, offset; + tree rval, nval; + + for (vb = list; vb; vb = TREE_CHAIN (vb)) + if (elem == BINFO_TYPE (vb)) + return size_binop (PLUS_EXPR, initial_offset, BINFO_OFFSET (vb)); + rval = 0; + for (vb = list; vb; vb = TREE_CHAIN (vb)) + { + tree binfos = BINFO_BASETYPES (vb); + int i; + + if (binfos == NULL_TREE) + continue; + + for (i = TREE_VEC_LENGTH (binfos)-1; i >= 0; i--) + { + nval = binfo_value (elem, BINFO_TYPE (TREE_VEC_ELT (binfos, i))); + if (nval) + { + if (rval && BINFO_OFFSET (nval) != BINFO_OFFSET (rval)) + my_friendly_abort (105); + offset = BINFO_OFFSET (vb); + rval = nval; + } + } + } + if (rval == NULL_TREE) + return rval; + return size_binop (PLUS_EXPR, offset, BINFO_OFFSET (rval)); +} + +void +debug_binfo (elem) + tree elem; +{ + int i; + tree virtuals; + + fprintf (stderr, "type \"%s\"; offset = %d\n", + TYPE_NAME_STRING (BINFO_TYPE (elem)), + TREE_INT_CST_LOW (BINFO_OFFSET (elem))); + fprintf (stderr, "vtable type:\n"); + debug_tree (BINFO_TYPE (elem)); + if (BINFO_VTABLE (elem)) + fprintf (stderr, "vtable decl \"%s\"\n", IDENTIFIER_POINTER (DECL_NAME (BINFO_VTABLE (elem)))); + else + fprintf (stderr, "no vtable decl yet\n"); + fprintf (stderr, "virtuals:\n"); + virtuals = BINFO_VIRTUALS (elem); + if (virtuals != 0) + { + virtuals = TREE_CHAIN (virtuals); + if (flag_dossier) + virtuals = TREE_CHAIN (virtuals); + } + i = 1; + while (virtuals) + { + tree fndecl = TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (virtuals)), 0); + fprintf (stderr, "%s [%d =? %d]\n", + IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)), + i, TREE_INT_CST_LOW (DECL_VINDEX (fndecl))); + virtuals = TREE_CHAIN (virtuals); + i += 1; + } +} + +/* Return the length of a chain of nodes chained through DECL_CHAIN. + We expect a null pointer to mark the end of the chain. + This is the Lisp primitive `length'. */ + +int +decl_list_length (t) + tree t; +{ + register tree tail; + register int len = 0; + + my_friendly_assert (TREE_CODE (t) == FUNCTION_DECL + || TREE_CODE (t) == TEMPLATE_DECL, 300); + for (tail = t; tail; tail = DECL_CHAIN (tail)) + len++; + + return len; +} + +int +count_functions (t) + tree t; +{ + if (TREE_CODE (t) == FUNCTION_DECL) + return 1; + + return decl_list_length (TREE_VALUE (t)); +} + +/* Like value_member, but for DECL_CHAINs. */ +tree +decl_value_member (elem, list) + tree elem, list; +{ + while (list) + { + if (elem == list) + return list; + list = DECL_CHAIN (list); + } + return NULL_TREE; +} + +int +is_overloaded_fn (x) + tree x; +{ + if (TREE_CODE (x) == FUNCTION_DECL) + return 1; + + if (TREE_CODE (x) == TREE_LIST + && (TREE_CODE (TREE_VALUE (x)) == FUNCTION_DECL + || TREE_CODE (TREE_VALUE (x)) == TEMPLATE_DECL)) + return 1; + + return 0; +} + +tree +get_first_fn (from) + tree from; +{ + if (TREE_CODE (from) == FUNCTION_DECL) + return from; + + my_friendly_assert (TREE_CODE (from) == TREE_LIST, 9); + + return TREE_VALUE (from); +} + +tree +fnaddr_from_vtable_entry (entry) + tree entry; +{ + return TREE_VALUE (TREE_CHAIN (TREE_CHAIN (CONSTRUCTOR_ELTS (entry)))); +} + +void +set_fnaddr_from_vtable_entry (entry, value) + tree entry, value; +{ + TREE_VALUE (TREE_CHAIN (TREE_CHAIN (CONSTRUCTOR_ELTS (entry)))) = value; +} + +tree +function_arg_chain (t) + tree t; +{ + return TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (t))); +} + +int +promotes_to_aggr_type (t, code) + tree t; + enum tree_code code; +{ + if (TREE_CODE (t) == code) + t = TREE_TYPE (t); + return IS_AGGR_TYPE (t); +} + +int +is_aggr_type_2 (t1, t2) + tree t1, t2; +{ + if (TREE_CODE (t1) != TREE_CODE (t2)) + return 0; + return IS_AGGR_TYPE (t1) && IS_AGGR_TYPE (t2); +} + +/* Give message using types TYPE1 and TYPE2 as arguments. + PFN is the function which will print the message; + S is the format string for PFN to use. */ +void +message_2_types (pfn, s, type1, type2) + void (*pfn) (); + char *s; + tree type1, type2; +{ + tree name1 = TYPE_NAME (type1); + tree name2 = TYPE_NAME (type2); + if (TREE_CODE (name1) == TYPE_DECL) + name1 = DECL_NAME (name1); + if (TREE_CODE (name2) == TYPE_DECL) + name2 = DECL_NAME (name2); + (*pfn) (s, IDENTIFIER_POINTER (name1), IDENTIFIER_POINTER (name2)); +} + +#define PRINT_RING_SIZE 4 + +char * +lang_printable_name (decl) + tree decl; +{ + static tree decl_ring[PRINT_RING_SIZE]; + static char *print_ring[PRINT_RING_SIZE]; + static int ring_counter; + int i; + + /* Only cache functions. */ + if (TREE_CODE (decl) != FUNCTION_DECL + || DECL_LANG_SPECIFIC (decl) == 0) + return decl_as_string (decl, 1); + + /* See if this print name is lying around. */ + for (i = 0; i < PRINT_RING_SIZE; i++) + if (decl_ring[i] == decl) + /* yes, so return it. */ + return print_ring[i]; + + if (++ring_counter == PRINT_RING_SIZE) + ring_counter = 0; + + if (current_function_decl != NULL_TREE) + { + if (decl_ring[ring_counter] == current_function_decl) + ring_counter += 1; + if (ring_counter == PRINT_RING_SIZE) + ring_counter = 0; + if (decl_ring[ring_counter] == current_function_decl) + my_friendly_abort (106); + } + + if (print_ring[ring_counter]) + free (print_ring[ring_counter]); + + { + int print_ret_type_p + = (!DECL_CONSTRUCTOR_P (decl) + && !DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl))); + + char *name = (char *)decl_as_string (decl, print_ret_type_p); + print_ring[ring_counter] = (char *)malloc (strlen (name) + 1); + strcpy (print_ring[ring_counter], name); + decl_ring[ring_counter] = decl; + } + return print_ring[ring_counter]; +} + +/* Comparison function for sorting identifiers in RAISES lists. + Note that because IDENTIFIER_NODEs are unique, we can sort + them by address, saving an indirection. */ +static int +id_cmp (p1, p2) + tree *p1, *p2; +{ + return (HOST_WIDE_INT)TREE_VALUE (*p1) - (HOST_WIDE_INT)TREE_VALUE (*p2); +} + +/* Build the FUNCTION_TYPE or METHOD_TYPE which may raise exceptions + listed in RAISES. */ +tree +build_exception_variant (ctype, type, raises) + tree ctype, type; + tree raises; +{ + int i; + tree v = TYPE_MAIN_VARIANT (type); + tree t, t2, cname; + tree *a = (tree *)alloca ((list_length (raises)+1) * sizeof (tree)); + int constp = TYPE_READONLY (type); + int volatilep = TYPE_VOLATILE (type); + + if (raises && TREE_CHAIN (raises)) + { + for (i = 0, t = raises; t; t = TREE_CHAIN (t), i++) + a[i] = t; + /* NULL terminator for list. */ + a[i] = NULL_TREE; + qsort (a, i, sizeof (tree), id_cmp); + while (i--) + TREE_CHAIN (a[i]) = a[i+1]; + raises = a[0]; + } + else if (raises) + /* do nothing. */; + else + return build_type_variant (v, constp, volatilep); + + if (ctype) + { + cname = TYPE_NAME (ctype); + if (TREE_CODE (cname) == TYPE_DECL) + cname = DECL_NAME (cname); + } + else + cname = NULL_TREE; + + for (t = raises; t; t = TREE_CHAIN (t)) + { + /* See that all the exceptions we are thinking about + raising have been declared. */ + tree this_cname = lookup_exception_cname (ctype, cname, t); + tree decl = lookup_exception_object (this_cname, TREE_VALUE (t), 1); + + if (decl == NULL_TREE) + decl = lookup_exception_object (this_cname, TREE_VALUE (t), 0); + /* Place canonical exception decl into TREE_TYPE of RAISES list. */ + TREE_TYPE (t) = decl; + } + + for (v = TYPE_NEXT_VARIANT (v); v; v = TYPE_NEXT_VARIANT (v)) + { + if (TYPE_READONLY (v) != constp + || TYPE_VOLATILE (v) != volatilep) + continue; + + t = raises; + t2 = TYPE_RAISES_EXCEPTIONS (v); + while (t && t2) + { + if (TREE_TYPE (t) == TREE_TYPE (t2)) + { + t = TREE_CHAIN (t); + t2 = TREE_CHAIN (t2); + } + else break; + } + if (t || t2) + continue; + /* List of exceptions raised matches previously found list. + + @@ Nice to free up storage used in consing up the + @@ list of exceptions raised. */ + return v; + } + + /* Need to build a new variant. */ + v = copy_node (type); + TYPE_NEXT_VARIANT (v) = TYPE_NEXT_VARIANT (type); + TYPE_NEXT_VARIANT (type) = v; + if (raises && ! TREE_PERMANENT (raises)) + { + push_obstacks_nochange (); + end_temporary_allocation (); + raises = copy_list (raises); + pop_obstacks (); + } + TYPE_RAISES_EXCEPTIONS (v) = raises; + return v; +} + +/* Subroutine of copy_to_permanent + + Assuming T is a node build bottom-up, make it all exist on + permanent obstack, if it is not permanent already. */ +static tree +make_deep_copy (t) + tree t; +{ + enum tree_code code; + + if (t == NULL_TREE || TREE_PERMANENT (t)) + return t; + + switch (code = TREE_CODE (t)) + { + case ERROR_MARK: + return error_mark_node; + + case VAR_DECL: + case FUNCTION_DECL: + case CONST_DECL: + break; + + case PARM_DECL: + { + tree chain = TREE_CHAIN (t); + t = copy_node (t); + TREE_CHAIN (t) = make_deep_copy (chain); + TREE_TYPE (t) = make_deep_copy (TREE_TYPE (t)); + DECL_INITIAL (t) = make_deep_copy (DECL_INITIAL (t)); + DECL_SIZE (t) = make_deep_copy (DECL_SIZE (t)); + return t; + } + + case TREE_LIST: + { + tree chain = TREE_CHAIN (t); + t = copy_node (t); + TREE_PURPOSE (t) = make_deep_copy (TREE_PURPOSE (t)); + TREE_VALUE (t) = make_deep_copy (TREE_VALUE (t)); + TREE_CHAIN (t) = make_deep_copy (chain); + return t; + } + + case TREE_VEC: + { + int len = TREE_VEC_LENGTH (t); + + t = copy_node (t); + while (len--) + TREE_VEC_ELT (t, len) = make_deep_copy (TREE_VEC_ELT (t, len)); + return t; + } + + case INTEGER_CST: + case REAL_CST: + case STRING_CST: + return copy_node (t); + + case COND_EXPR: + case TARGET_EXPR: + case NEW_EXPR: + t = copy_node (t); + TREE_OPERAND (t, 0) = make_deep_copy (TREE_OPERAND (t, 0)); + TREE_OPERAND (t, 1) = make_deep_copy (TREE_OPERAND (t, 1)); + TREE_OPERAND (t, 2) = make_deep_copy (TREE_OPERAND (t, 2)); + return t; + + case SAVE_EXPR: + t = copy_node (t); + TREE_OPERAND (t, 0) = make_deep_copy (TREE_OPERAND (t, 0)); + return t; + + case MODIFY_EXPR: + case PLUS_EXPR: + case MINUS_EXPR: + case MULT_EXPR: + case TRUNC_DIV_EXPR: + case TRUNC_MOD_EXPR: + case MIN_EXPR: + case MAX_EXPR: + case LSHIFT_EXPR: + case RSHIFT_EXPR: + case BIT_IOR_EXPR: + case BIT_XOR_EXPR: + case BIT_AND_EXPR: + case BIT_ANDTC_EXPR: + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: + case LT_EXPR: + case LE_EXPR: + case GT_EXPR: + case GE_EXPR: + case EQ_EXPR: + case NE_EXPR: + case CEIL_DIV_EXPR: + case FLOOR_DIV_EXPR: + case ROUND_DIV_EXPR: + case CEIL_MOD_EXPR: + case FLOOR_MOD_EXPR: + case ROUND_MOD_EXPR: + case COMPOUND_EXPR: + case PREDECREMENT_EXPR: + case PREINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + case CALL_EXPR: + t = copy_node (t); + TREE_OPERAND (t, 0) = make_deep_copy (TREE_OPERAND (t, 0)); + TREE_OPERAND (t, 1) = make_deep_copy (TREE_OPERAND (t, 1)); + return t; + + case CONVERT_EXPR: + case ADDR_EXPR: + case INDIRECT_REF: + case NEGATE_EXPR: + case BIT_NOT_EXPR: + case TRUTH_NOT_EXPR: + case NOP_EXPR: + case COMPONENT_REF: + t = copy_node (t); + TREE_OPERAND (t, 0) = make_deep_copy (TREE_OPERAND (t, 0)); + return t; + + /* This list is incomplete, but should suffice for now. + It is very important that `sorry' does not call + `report_error_function'. That could cause an infinite loop. */ + default: + sorry ("initializer contains unrecognized tree code"); + return error_mark_node; + + } + my_friendly_abort (107); + /* NOTREACHED */ + return NULL_TREE; +} + +/* Assuming T is a node built bottom-up, make it all exist on + permanent obstack, if it is not permanent already. */ +tree +copy_to_permanent (t) + tree t; +{ + register struct obstack *ambient_obstack = current_obstack; + register struct obstack *ambient_saveable_obstack = saveable_obstack; + + if (t == NULL_TREE || TREE_PERMANENT (t)) + return t; + + saveable_obstack = &permanent_obstack; + current_obstack = saveable_obstack; + + t = make_deep_copy (t); + + current_obstack = ambient_obstack; + saveable_obstack = ambient_saveable_obstack; + + return t; +} + +void +print_lang_statistics () +{ + extern struct obstack maybepermanent_obstack; + print_obstack_statistics ("class_obstack", &class_obstack); + print_obstack_statistics ("permanent_obstack", &permanent_obstack); + print_obstack_statistics ("maybepermanent_obstack", &maybepermanent_obstack); + print_search_statistics (); + print_class_statistics (); +} + +/* This is used by the `assert' macro. It is provided in libgcc.a, + which `cc' doesn't know how to link. Note that the C++ front-end + no longer actually uses the `assert' macro (instead, it calls + my_friendly_assert). But all of the back-end files still need this. */ +void +__eprintf (string, expression, line, filename) +#ifdef __STDC__ + const char *string; + const char *expression; + unsigned line; + const char *filename; +#else + char *string; + char *expression; + unsigned line; + char *filename; +#endif +{ + fprintf (stderr, string, expression, line, filename); + fflush (stderr); + abort (); +} + +/* Return, as an INTEGER_CST node, the number of elements for + TYPE (which is an ARRAY_TYPE). This counts only elements of the top array. */ + +tree +array_type_nelts_top (type) + tree type; +{ + return fold (build (PLUS_EXPR, integer_type_node, + array_type_nelts (type), + integer_one_node)); +} + +/* Return, as an INTEGER_CST node, the number of elements for + TYPE (which is an ARRAY_TYPE). This one is a recursive count of all + ARRAY_TYPEs that are clumped together. */ + +tree +array_type_nelts_total (type) + tree type; +{ + tree sz = array_type_nelts_top (type); + type = TREE_TYPE (type); + while (TREE_CODE (type) == ARRAY_TYPE) + { + tree n = array_type_nelts_top (type); + sz = fold (build (MULT_EXPR, integer_type_node, sz, n)); + type = TREE_TYPE (type); + } + return sz; +} diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c new file mode 100644 index 0000000..e688937 --- /dev/null +++ b/gcc/cp/typeck.c @@ -0,0 +1,6926 @@ +/* Build expressions with type checking for C++ compiler. + Copyright (C) 1987, 88, 89, 92, 93, 1994 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This file is part of the C++ front end. + It contains routines to build C++ expressions given their operands, + including computing the types of the result, C and C++ specific error + checks, and some optimization. + + There are also routines to build RETURN_STMT nodes and CASE_STMT nodes, + and to process initializations in declarations (since they work + like a strange sort of assignment). */ + +extern void error (); +extern void warning (); + +#include "config.h" +#include <stdio.h> +#include "tree.h" +#include "rtl.h" +#include "cp-tree.h" +#include "flags.h" + +int mark_addressable (); +static tree convert_for_assignment (); +/* static */ tree convert_for_initialization (); +int compparms (); +static int self_promoting_args_p (); +int comp_target_types (); +extern tree shorten_compare (); +extern void binary_op_error (); +static tree pointer_int_sum (); +static tree pointer_diff (); +static tree convert_sequence (); +/* static */ tree unary_complex_lvalue (); +static void pedantic_lvalue_warning (); +tree truthvalue_conversion (); + +extern rtx original_result_rtx; + +/* Return the target type of TYPE, which meas return T for: + T*, T&, T[], T (...), and otherwise, just T. */ + +tree +target_type (type) + tree type; +{ + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + while (TREE_CODE (type) == POINTER_TYPE + || TREE_CODE (type) == ARRAY_TYPE + || TREE_CODE (type) == FUNCTION_TYPE + || TREE_CODE (type) == METHOD_TYPE + || TREE_CODE (type) == OFFSET_TYPE) + type = TREE_TYPE (type); + return type; +} + +/* Do `exp = require_complete_type (exp);' to make sure exp + does not have an incomplete type. (That includes void types.) */ + +tree +require_complete_type (value) + tree value; +{ + tree type = TREE_TYPE (value); + + /* First, detect a valid value with a complete type. */ + if (TYPE_SIZE (type) != 0 + && type != void_type_node + && ! (TYPE_LANG_SPECIFIC (type) + && (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type)) + && TYPE_SIZE (SIGNATURE_TYPE (type)) == 0)) + return value; + + /* If we see X::Y, we build an OFFSET_TYPE which has + not been laid out. Try to avoid an error by interpreting + it as this->X::Y, if reasonable. */ + if (TREE_CODE (value) == OFFSET_REF + && C_C_D != 0 + && TREE_OPERAND (value, 0) == C_C_D) + { + tree base, member = TREE_OPERAND (value, 1); + tree basetype = TYPE_OFFSET_BASETYPE (type); + my_friendly_assert (TREE_CODE (member) == FIELD_DECL, 305); + base = convert_pointer_to (basetype, current_class_decl); + value = build (COMPONENT_REF, TREE_TYPE (member), + build_indirect_ref (base, NULL_PTR), member); + return require_complete_type (value); + } + + incomplete_type_error (value, type); + return error_mark_node; +} + +/* Return truthvalue of whether type of EXP is instantiated. */ +int +type_unknown_p (exp) + tree exp; +{ + return (TREE_CODE (exp) == TREE_LIST + || TREE_TYPE (exp) == unknown_type_node + || (TREE_CODE (TREE_TYPE (exp)) == OFFSET_TYPE + && TREE_TYPE (TREE_TYPE (exp)) == unknown_type_node)); +} + +/* Return truthvalue of whether T is function (or pfn) type. */ +int +fntype_p (t) + tree t; +{ + return (TREE_CODE (t) == FUNCTION_TYPE || TREE_CODE (t) == METHOD_TYPE + || (TREE_CODE (t) == POINTER_TYPE + && (TREE_CODE (TREE_TYPE (t)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (t)) == METHOD_TYPE))); +} + +/* Do `exp = require_instantiated_type (type, exp);' to make sure EXP + does not have an uninstantiated type. + TYPE is type to instantiate with, if uninstantiated. */ +tree +require_instantiated_type (type, exp, errval) + tree type, exp, errval; +{ + if (TREE_TYPE (exp) == NULL_TREE) + { + error ("argument list may not have an initializer list"); + return errval; + } + + if (TREE_TYPE (exp) == unknown_type_node + || (TREE_CODE (TREE_TYPE (exp)) == OFFSET_TYPE + && TREE_TYPE (TREE_TYPE (exp)) == unknown_type_node)) + { + exp = instantiate_type (type, exp, 1); + if (TREE_TYPE (exp) == error_mark_node) + return errval; + } + return exp; +} + +/* Return a variant of TYPE which has all the type qualifiers of LIKE + as well as those of TYPE. */ + +static tree +qualify_type (type, like) + tree type, like; +{ + int constflag = TYPE_READONLY (type) || TYPE_READONLY (like); + int volflag = TYPE_VOLATILE (type) || TYPE_VOLATILE (like); + /* @@ Must do member pointers here. */ + return build_type_variant (type, constflag, volflag); +} + +/* Return the common type of two parameter lists. + We assume that comptypes has already been done and returned 1; + if that isn't so, this may crash. + + As an optimization, free the space we allocate if the parameter + lists are already common. */ + +tree +commonparms (p1, p2) + tree p1, p2; +{ + tree oldargs = p1, newargs, n; + int i, len; + int any_change = 0; + char *first_obj = (char *) oballoc (0); + + len = list_length (p1); + newargs = tree_last (p1); + + if (newargs == void_list_node) + i = 1; + else + { + i = 0; + newargs = 0; + } + + for (; i < len; i++) + newargs = tree_cons (NULL_TREE, NULL_TREE, newargs); + + n = newargs; + + for (i = 0; p1; + p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2), n = TREE_CHAIN (n), i++) + { + if (TREE_PURPOSE (p1) && !TREE_PURPOSE (p2)) + { + /* We used to give a warning here that advised about a default + argument being given in the prototype but not in the function's + declaration. It's best not to bother. */ + TREE_PURPOSE (n) = TREE_PURPOSE (p1); + any_change = 1; + } + else if (! TREE_PURPOSE (p1)) + { + if (TREE_PURPOSE (p2)) + { + TREE_PURPOSE (n) = TREE_PURPOSE (p2); + any_change = 1; + } + } + else + { + int cmp = simple_cst_equal (TREE_PURPOSE (p1), TREE_PURPOSE (p2)); + if (cmp < 0) + my_friendly_abort (111); + if (cmp == 0) + { + error ("redeclaration of default argument %d", i+1); + any_change = 1; + } + TREE_PURPOSE (n) = TREE_PURPOSE (p2); + } + if (TREE_VALUE (p1) != TREE_VALUE (p2)) + { + any_change = 1; + TREE_VALUE (n) = common_type (TREE_VALUE (p1), TREE_VALUE (p2)); + } + else + TREE_VALUE (n) = TREE_VALUE (p1); + } + if (! any_change) + { + obfree (first_obj); + return oldargs; + } + + return newargs; +} + +/* Return the common type of two types. + We assume that comptypes has already been done and returned 1; + if that isn't so, this may crash. + + This is the type for the result of most arithmetic operations + if the operands have the given two types. + + We do not deal with enumeral types here because they have already been + converted to integer types. */ + +tree +common_type (t1, t2) + tree t1, t2; +{ + register enum tree_code code1; + register enum tree_code code2; + + /* Save time if the two types are the same. */ + + if (t1 == t2) return t1; + + /* If one type is nonsense, use the other. */ + if (t1 == error_mark_node) + return t2; + if (t2 == error_mark_node) + return t1; + + /* Treat an enum type as the unsigned integer type of the same width. */ + + if (TREE_CODE (t1) == ENUMERAL_TYPE) + t1 = type_for_size (TYPE_PRECISION (t1), 1); + if (TREE_CODE (t2) == ENUMERAL_TYPE) + t2 = type_for_size (TYPE_PRECISION (t2), 1); + + code1 = TREE_CODE (t1); + code2 = TREE_CODE (t2); + + switch (code1) + { + case INTEGER_TYPE: + case REAL_TYPE: + /* If only one is real, use it as the result. */ + + if (code1 == REAL_TYPE && code2 != REAL_TYPE) + return t1; + + if (code2 == REAL_TYPE && code1 != REAL_TYPE) + return t2; + + /* Both real or both integers; use the one with greater precision. */ + + if (TYPE_PRECISION (t1) > TYPE_PRECISION (t2)) + return t1; + else if (TYPE_PRECISION (t2) > TYPE_PRECISION (t1)) + return t2; + + /* Same precision. Prefer longs to ints even when same size. */ + + if (TYPE_MAIN_VARIANT (t1) == long_unsigned_type_node + || TYPE_MAIN_VARIANT (t2) == long_unsigned_type_node) + return long_unsigned_type_node; + + if (TYPE_MAIN_VARIANT (t1) == long_integer_type_node + || TYPE_MAIN_VARIANT (t2) == long_integer_type_node) + { + /* But preserve unsignedness from the other type, + since long cannot hold all the values of an unsigned int. */ + if (TREE_UNSIGNED (t1) || TREE_UNSIGNED (t2)) + return long_unsigned_type_node; + return long_integer_type_node; + } + + /* Otherwise prefer the unsigned one. */ + + if (TREE_UNSIGNED (t1)) + return t1; + else return t2; + + case POINTER_TYPE: + case REFERENCE_TYPE: + /* For two pointers, do this recursively on the target type, + and combine the qualifiers of the two types' targets. */ + /* This code was turned off; I don't know why. + But ANSI C++ specifies doing this with the qualifiers. + So I turned it on again. */ + { + tree target = common_type (TYPE_MAIN_VARIANT (TREE_TYPE (t1)), + TYPE_MAIN_VARIANT (TREE_TYPE (t2))); + int constp + = TYPE_READONLY (TREE_TYPE (t1)) || TYPE_READONLY (TREE_TYPE (t2)); + int volatilep + = TYPE_VOLATILE (TREE_TYPE (t1)) || TYPE_VOLATILE (TREE_TYPE (t2)); + target = build_type_variant (target, constp, volatilep); + if (code1 == POINTER_TYPE) + return build_pointer_type (target); + else + return build_reference_type (target); + } +#if 0 + case POINTER_TYPE: + return build_pointer_type (common_type (TREE_TYPE (t1), TREE_TYPE (t2))); + + case REFERENCE_TYPE: + return build_reference_type (common_type (TREE_TYPE (t1), TREE_TYPE (t2))); +#endif + + case ARRAY_TYPE: + { + tree elt = common_type (TREE_TYPE (t1), TREE_TYPE (t2)); + /* Save space: see if the result is identical to one of the args. */ + if (elt == TREE_TYPE (t1) && TYPE_DOMAIN (t1)) + return t1; + if (elt == TREE_TYPE (t2) && TYPE_DOMAIN (t2)) + return t2; + /* Merge the element types, and have a size if either arg has one. */ + return build_array_type (elt, TYPE_DOMAIN (TYPE_DOMAIN (t1) ? t1 : t2)); + } + + case FUNCTION_TYPE: + /* Function types: prefer the one that specified arg types. + If both do, merge the arg types. Also merge the return types. */ + { + tree valtype = common_type (TREE_TYPE (t1), TREE_TYPE (t2)); + tree p1 = TYPE_ARG_TYPES (t1); + tree p2 = TYPE_ARG_TYPES (t2); + tree rval, raises; + + /* Save space: see if the result is identical to one of the args. */ + if (valtype == TREE_TYPE (t1) && ! p2) + return t1; + if (valtype == TREE_TYPE (t2) && ! p1) + return t2; + + /* Simple way if one arg fails to specify argument types. */ + if (p1 == NULL_TREE || TREE_VALUE (p1) == void_type_node) + { + rval = build_function_type (valtype, p2); + if (raises = TYPE_RAISES_EXCEPTIONS (t2)) + rval = build_exception_variant (NULL_TREE, rval, raises); + return rval; + } + raises = TYPE_RAISES_EXCEPTIONS (t1); + if (p2 == NULL_TREE || TREE_VALUE (p2) == void_type_node) + { + rval = build_function_type (valtype, p1); + if (raises) + rval = build_exception_variant (NULL_TREE, rval, raises); + return rval; + } + + rval = build_function_type (valtype, commonparms (p1, p2)); + return build_exception_variant (NULL_TREE, rval, raises); + } + + case RECORD_TYPE: + case UNION_TYPE: + my_friendly_assert (TYPE_MAIN_VARIANT (t1) == t1 + && TYPE_MAIN_VARIANT (t2) == t2, 306); + + if (binfo_or_else (t1, t2)) + return t1; + compiler_error ("common_type called with uncommon aggregate types"); + return t1; + + case METHOD_TYPE: + if (TYPE_METHOD_BASETYPE (t1) == TYPE_METHOD_BASETYPE (t2) + && TREE_CODE (TREE_TYPE (t1)) == TREE_CODE (TREE_TYPE (t2))) + { + /* Get this value the long way, since TYPE_METHOD_BASETYPE + is just the main variant of this. */ + tree basetype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t1))); + tree raises, t3; + + raises = TYPE_RAISES_EXCEPTIONS (t1); + + /* If this was a member function type, get back to the + original type of type member function (i.e., without + the class instance variable up front. */ + t1 = build_function_type (TREE_TYPE (t1), TREE_CHAIN (TYPE_ARG_TYPES (t1))); + t2 = build_function_type (TREE_TYPE (t2), TREE_CHAIN (TYPE_ARG_TYPES (t2))); + t3 = common_type (t1, t2); + t3 = build_cplus_method_type (basetype, TREE_TYPE (t3), TYPE_ARG_TYPES (t3)); + return build_exception_variant (basetype, t3, raises); + } + compiler_error ("common_type called with uncommon method types"); + return t1; + + case OFFSET_TYPE: + if (TYPE_OFFSET_BASETYPE (t1) == TYPE_OFFSET_BASETYPE (t2) + && TREE_CODE (TREE_TYPE (t1)) == TREE_CODE (TREE_TYPE (t2))) + { + tree basetype = TYPE_OFFSET_BASETYPE (t1); + return build_offset_type (basetype, + common_type (TREE_TYPE (t1), TREE_TYPE (t2))); + } + compiler_error ("common_type called with uncommon member types"); + return t1; + + default: + return t1; + } +} + +/* Return 1 if TYPE1 and TYPE2 raise the same exceptions. */ +int +compexcepttypes (t1, t2, strict) + tree t1, t2; + int strict; +{ + return TYPE_RAISES_EXCEPTIONS (t1) == TYPE_RAISES_EXCEPTIONS (t2); +} + +static int +comp_array_types (cmp, t1, t2, strict) + register int (*cmp)(); + tree t1, t2; + int strict; +{ + tree d1 = TYPE_DOMAIN (t1); + tree d2 = TYPE_DOMAIN (t2); + + /* Target types must match incl. qualifiers. */ + if (!(TREE_TYPE (t1) == TREE_TYPE (t2) + || (*cmp) (TREE_TYPE (t1), TREE_TYPE (t2), strict))) + return 0; + + /* Sizes must match unless one is missing or variable. */ + if (d1 == 0 || d2 == 0 || d1 == d2 + || TREE_CODE (TYPE_MIN_VALUE (d1)) != INTEGER_CST + || TREE_CODE (TYPE_MIN_VALUE (d2)) != INTEGER_CST + || TREE_CODE (TYPE_MAX_VALUE (d1)) != INTEGER_CST + || TREE_CODE (TYPE_MAX_VALUE (d2)) != INTEGER_CST) + return 1; + + return ((TREE_INT_CST_LOW (TYPE_MIN_VALUE (d1)) + == TREE_INT_CST_LOW (TYPE_MIN_VALUE (d2))) + && (TREE_INT_CST_HIGH (TYPE_MIN_VALUE (d1)) + == TREE_INT_CST_HIGH (TYPE_MIN_VALUE (d2))) + && (TREE_INT_CST_LOW (TYPE_MAX_VALUE (d1)) + == TREE_INT_CST_LOW (TYPE_MAX_VALUE (d2))) + && (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (d1)) + == TREE_INT_CST_HIGH (TYPE_MAX_VALUE (d2)))); +} + +/* Return 1 if TYPE1 and TYPE2 are compatible types for assignment + or various other operations. This is what ANSI C++ speaks of as + "being the same". + + For C++: argument STRICT says we should be strict about this + comparison: + + 2 : strict, except that if one type is a reference and + the other is not, compare the target type of the + reference to the type that's not a reference (ARM, p308). + 1 : strict (compared according to ANSI C) + 0 : <= (compared according to C++) + -1: <= or >= (relaxed) + + Otherwise, pointers involving base classes and derived classes + can be mixed as legal: i.e. a pointer to a base class may be assigned + to a pointer to one of its derived classes, as per C++. A pointer to + a derived class may be passed as a parameter to a function expecting a + pointer to a base classes. These allowances do not commute. In this + case, TYPE1 is assumed to be the base class, and TYPE2 is assumed to + be the derived class. */ +int +comptypes (type1, type2, strict) + tree type1, type2; + int strict; +{ + register tree t1 = type1; + register tree t2 = type2; + + /* Suppress errors caused by previously reported errors */ + + if (t1 == t2) + return 1; + + /* This should never happen. */ + my_friendly_assert (t1 != error_mark_node, 307); + + if (t2 == error_mark_node) + return 0; + + if (strict < 0) + { + /* Treat an enum type as the unsigned integer type of the same width. */ + + if (TREE_CODE (t1) == ENUMERAL_TYPE) + t1 = type_for_size (TYPE_PRECISION (t1), 1); + if (TREE_CODE (t2) == ENUMERAL_TYPE) + t2 = type_for_size (TYPE_PRECISION (t2), 1); + } + + if (t1 == t2) + return 1; + + /* Different classes of types can't be compatible. */ + + if (TREE_CODE (t1) != TREE_CODE (t2)) + { + if (strict == 2 + && ((TREE_CODE (t1) == REFERENCE_TYPE) + ^ (TREE_CODE (t2) == REFERENCE_TYPE))) + { + if (TREE_CODE (t1) == REFERENCE_TYPE) + return comptypes (TREE_TYPE (t1), t2, 1); + return comptypes (t1, TREE_TYPE (t2), 1); + } + + return 0; + } + if (strict > 1) + strict = 1; + + /* Qualifiers must match. */ + + if (TYPE_READONLY (t1) != TYPE_READONLY (t2)) + return 0; + if (TREE_THIS_VOLATILE (t1) != TREE_THIS_VOLATILE (t2)) + return 0; + + /* Allow for two different type nodes which have essentially the same + definition. Note that we already checked for equality of the type + type qualifiers (just above). */ + + if (TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2)) + return 1; + + switch (TREE_CODE (t1)) + { + case RECORD_TYPE: + case UNION_TYPE: + if (t1 == t2) + return 1; + if (strict <= 0) + goto look_hard; + return 0; + + case OFFSET_TYPE: + return (comptypes (TYPE_POINTER_TO (TYPE_OFFSET_BASETYPE (t1)), + TYPE_POINTER_TO (TYPE_OFFSET_BASETYPE (t2)), strict) + && comptypes (TREE_TYPE (t1), TREE_TYPE (t2), strict)); + + case METHOD_TYPE: + if (! compexcepttypes (t1, t2, strict)) + return 0; + + /* This case is anti-symmetrical! + One can pass a base member (or member function) + to something expecting a derived member (or member function), + but not vice-versa! */ + + return (comptypes (TYPE_POINTER_TO (TYPE_METHOD_BASETYPE (t2)), + TYPE_POINTER_TO (TYPE_METHOD_BASETYPE (t1)), strict) + && comptypes (TREE_TYPE (t1), TREE_TYPE (t2), strict) + && compparms (TREE_CHAIN (TYPE_ARG_TYPES (t1)), + TREE_CHAIN (TYPE_ARG_TYPES(t2)), strict)); + case POINTER_TYPE: + case REFERENCE_TYPE: + t1 = TREE_TYPE (t1); + t2 = TREE_TYPE (t2); + if (t1 == t2) + return 1; + if (strict <= 0) + { + if (TREE_CODE (t1) == RECORD_TYPE && TREE_CODE (t2) == RECORD_TYPE) + { + int rval; + look_hard: + rval = t1 == t2 || UNIQUELY_DERIVED_FROM_P (t1, t2); + + if (rval) + return 1; + if (strict < 0) + return UNIQUELY_DERIVED_FROM_P (t2, t1); + } + return 0; + } + else + return comptypes (t1, t2, strict); + + case FUNCTION_TYPE: + if (! compexcepttypes (t1, t2, strict)) + return 0; + + return ((TREE_TYPE (t1) == TREE_TYPE (t2) + || comptypes (TREE_TYPE (t1), TREE_TYPE (t2), strict)) + && compparms (TYPE_ARG_TYPES (t1), TYPE_ARG_TYPES (t2), strict)); + + case ARRAY_TYPE: + /* Target types must match incl. qualifiers. */ + return comp_array_types (comptypes, t1, t2, strict); + + } + return 0; +} + +/* Return 1 if TTL and TTR are pointers to types that are equivalent, + ignoring their qualifiers. + + NPTRS is the number of pointers we can strip off and keep cool. + This is used to permit (for aggr A, aggr B) A, B* to convert to A*, + but to not permit B** to convert to A**. */ + +int +comp_target_types (ttl, ttr, nptrs) + tree ttl, ttr; + int nptrs; +{ + ttl = TYPE_MAIN_VARIANT (ttl); + ttr = TYPE_MAIN_VARIANT (ttr); + if (ttl == ttr) + return 1; + + if (TREE_CODE (ttr) != TREE_CODE (ttl)) + return 0; + + if (TREE_CODE (ttr) == POINTER_TYPE) + return comp_target_types (TREE_TYPE (ttl), TREE_TYPE (ttr), nptrs - 1); + + if (TREE_CODE (ttr) == REFERENCE_TYPE) + return comp_target_types (TREE_TYPE (ttl), TREE_TYPE (ttr), nptrs); + if (TREE_CODE (ttr) == ARRAY_TYPE) + return comp_array_types (comp_target_types, ttl, ttr, 0); + else if (TREE_CODE (ttr) == FUNCTION_TYPE || TREE_CODE (ttr) == METHOD_TYPE) + if (comp_target_types (TREE_TYPE (ttl), TREE_TYPE (ttr), nptrs)) + switch (comp_target_parms (TYPE_ARG_TYPES (ttl), TYPE_ARG_TYPES (ttr), 0)) + { + case 0: + return 0; + case 1: + return 1; + case 2: + warning ("contravariance violation for method types ignored"); + return 1; + default: + my_friendly_abort (112); + } + else + return 0; + + /* for C++ */ + else if (TREE_CODE (ttr) == OFFSET_TYPE) + { + /* Contravariance: we can assign a pointer to base member to a pointer + to derived member. Note difference from simple pointer case, where + we can pass a pointer to derived to a pointer to base. */ + if (comptypes (TYPE_OFFSET_BASETYPE (ttr), TYPE_OFFSET_BASETYPE (ttl), 0)) + return comp_target_types (TREE_TYPE (ttl), TREE_TYPE (ttr), nptrs); + else if (comptypes (TYPE_OFFSET_BASETYPE (ttl), TYPE_OFFSET_BASETYPE (ttr), 0) + && comp_target_types (TREE_TYPE (ttl), TREE_TYPE (ttr), nptrs)) + { + warning ("contravariance violation for member types ignored"); + return 1; + } + } + else if (IS_AGGR_TYPE (ttl)) + { + if (nptrs < 0) + return 0; + return comptypes (TYPE_POINTER_TO (ttl), TYPE_POINTER_TO (ttr), 0); + } + + return 0; +} + +/* If two types share a common base type, return that basetype. + If there is not a unique most-derived base type, this function + returns ERROR_MARK_NODE. */ +tree +common_base_type (tt1, tt2) + tree tt1, tt2; +{ + tree best = NULL_TREE, tmp; + int i; + + /* If one is a baseclass of another, that's good enough. */ + if (UNIQUELY_DERIVED_FROM_P (tt1, tt2)) + return tt1; + if (UNIQUELY_DERIVED_FROM_P (tt2, tt1)) + return tt2; + + /* If they share a virtual baseclass, that's good enough. */ + for (tmp = CLASSTYPE_VBASECLASSES (tt1); tmp; tmp = TREE_CHAIN (tmp)) + { + if (binfo_member (BINFO_TYPE (tmp), CLASSTYPE_VBASECLASSES (tt2))) + return BINFO_TYPE (tmp); + } + + /* Otherwise, try to find a unique baseclass of TT1 + that is shared by TT2, and follow that down. */ + for (i = CLASSTYPE_N_BASECLASSES (tt1)-1; i >= 0; i--) + { + tree basetype = TYPE_BINFO_BASETYPE (tt1, i); + tree trial = common_base_type (basetype, tt2); + if (trial) + { + if (trial == error_mark_node) + return trial; + if (best == NULL_TREE) + best = trial; + else if (best != trial) + return error_mark_node; + } + } + + /* Same for TT2. */ + for (i = CLASSTYPE_N_BASECLASSES (tt2)-1; i >= 0; i--) + { + tree basetype = TYPE_BINFO_BASETYPE (tt2, i); + tree trial = common_base_type (tt1, basetype); + if (trial) + { + if (trial == error_mark_node) + return trial; + if (best == NULL_TREE) + best = trial; + else if (best != trial) + return error_mark_node; + } + } + return best; +} + +/* Subroutines of `comptypes'. */ + +/* Return 1 if two parameter type lists PARMS1 and PARMS2 + are equivalent in the sense that functions with those parameter types + can have equivalent types. + If either list is empty, we win. + Otherwise, the two lists must be equivalent, element by element. + + C++: See comment above about TYPE1, TYPE2, STRICT. + If STRICT == 3, it means checking is strict, but do not compare + default parameter values. */ +int +compparms (parms1, parms2, strict) + tree parms1, parms2; + int strict; +{ + register tree t1 = parms1, t2 = parms2; + + /* An unspecified parmlist matches any specified parmlist + whose argument types don't need default promotions. */ + + if (t1 == 0) + return self_promoting_args_p (t2); + if (t2 == 0) + return self_promoting_args_p (t1); + + while (1) + { + if (t1 == 0 && t2 == 0) + return 1; + /* If one parmlist is shorter than the other, + they fail to match, unless STRICT is <= 0. */ + if (t1 == 0 || t2 == 0) + { + if (strict > 0) + return 0; + if (strict < 0) + return 1; + if (strict == 0) + return t1 && TREE_PURPOSE (t1); + } + if (! comptypes (TREE_VALUE (t2), TREE_VALUE (t1), strict)) + { + if (strict > 0) + return 0; + if (strict == 0) + return t2 == void_list_node && TREE_PURPOSE (t1); + return TREE_PURPOSE (t1) || TREE_PURPOSE (t2); + } + if (strict != 3 && TREE_PURPOSE (t1) && TREE_PURPOSE (t2)) + { + int cmp = simple_cst_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2)); + if (cmp < 0) + my_friendly_abort (113); + if (cmp == 0) + return 0; + } + + t1 = TREE_CHAIN (t1); + t2 = TREE_CHAIN (t2); + } +} + +/* This really wants return whether or not parameter type lists + would make their owning functions assignment compatible or not. */ +int +comp_target_parms (parms1, parms2, strict) + tree parms1, parms2; + int strict; +{ + register tree t1 = parms1, t2 = parms2; + int warn_contravariance = 0; + + /* An unspecified parmlist matches any specified parmlist + whose argument types don't need default promotions. + @@@ see 13.3.3 for a counterexample... */ + + if (t1 == 0 && t2 != 0) + { + cp_pedwarn ("ANSI C++ prohibits conversion from `(%#T)' to `(...)'", + parms2); + return self_promoting_args_p (t2); + } + if (t2 == 0) + return self_promoting_args_p (t1); + + for (; t1 || t2; t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2)) + { + tree p1, p2; + + /* If one parmlist is shorter than the other, + they fail to match, unless STRICT is <= 0. */ + if (t1 == 0 || t2 == 0) + { + if (strict > 0) + return 0; + if (strict < 0) + return 1 + warn_contravariance; + return ((t1 && TREE_PURPOSE (t1)) + warn_contravariance); + } + p1 = TREE_VALUE (t1); + p2 = TREE_VALUE (t2); + if (p1 == p2) + continue; + if ((TREE_CODE (p1) == POINTER_TYPE && TREE_CODE (p2) == POINTER_TYPE) + || (TREE_CODE (p1) == REFERENCE_TYPE && TREE_CODE (p2) == REFERENCE_TYPE)) + { + if (strict <= 0 + && (TYPE_MAIN_VARIANT (TREE_TYPE (p1)) + == TYPE_MAIN_VARIANT (TREE_TYPE (p2)))) + continue; + + /* The following is wrong for contravariance, + but many programs depend on it. */ + if (TREE_TYPE (p1) == void_type_node) + continue; + if (TREE_TYPE (p2) == void_type_node) + { + warn_contravariance = 1; + continue; + } + if (IS_AGGR_TYPE (TREE_TYPE (p1))) + { + if (comptypes (p2, p1, 0) == 0) + { + if (comptypes (p1, p2, 0) != 0) + warn_contravariance = 1; + else + return 0; + } + continue; + } + } + /* Note backwards order due to contravariance. */ + if (comp_target_types (p2, p1, 1) == 0) + { + if (comp_target_types (p1, p2, 1)) + { + warn_contravariance = 1; + continue; + } + if (strict != 0) + return 0; +#if 0 + /* What good do these cases do? */ + if (strict == 0) + return p2 == void_type_node && TREE_PURPOSE (t1); + return TREE_PURPOSE (t1) || TREE_PURPOSE (t2); +#endif + } + /* Target types are compatible--just make sure that if + we use parameter lists, that they are ok as well. */ + if (TREE_CODE (p1) == FUNCTION_TYPE || TREE_CODE (p1) == METHOD_TYPE) + switch (comp_target_parms (TYPE_ARG_TYPES (p1), + TYPE_ARG_TYPES (p2), + strict)) + { + case 0: + return 0; + case 1: + break; + case 2: + warn_contravariance = 1; + } + + if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2)) + { + int cmp = simple_cst_equal (TREE_PURPOSE (t1), TREE_PURPOSE (t2)); + if (cmp < 0) + my_friendly_abort (114); + if (cmp == 0) + return 0; + } + } + return 1 + warn_contravariance; +} + +/* Return 1 if PARMS specifies a fixed number of parameters + and none of their types is affected by default promotions. */ + +static int +self_promoting_args_p (parms) + tree parms; +{ + register tree t; + for (t = parms; t; t = TREE_CHAIN (t)) + { + register tree type = TREE_VALUE (t); + + if (TREE_CHAIN (t) == 0 && type != void_type_node) + return 0; + + if (TYPE_MAIN_VARIANT (type) == float_type_node) + return 0; + + if (type == 0) + return 0; + + if (C_PROMOTING_INTEGER_TYPE_P (type)) + return 0; + } + return 1; +} + +/* Return an unsigned type the same as TYPE in other respects. + + C++: must make these work for type variants as well. */ + +tree +unsigned_type (type) + tree type; +{ + tree type1 = TYPE_MAIN_VARIANT (type); + if (type1 == signed_char_type_node || type1 == char_type_node) + return unsigned_char_type_node; + if (type1 == integer_type_node) + return unsigned_type_node; + if (type1 == short_integer_type_node) + return short_unsigned_type_node; + if (type1 == long_integer_type_node) + return long_unsigned_type_node; + if (type1 == long_long_integer_type_node) + return long_long_unsigned_type_node; + return type; +} + +/* Return a signed type the same as TYPE in other respects. */ + +tree +signed_type (type) + tree type; +{ + tree type1 = TYPE_MAIN_VARIANT (type); + if (type1 == unsigned_char_type_node || type1 == char_type_node) + return signed_char_type_node; + if (type1 == unsigned_type_node) + return integer_type_node; + if (type1 == short_unsigned_type_node) + return short_integer_type_node; + if (type1 == long_unsigned_type_node) + return long_integer_type_node; + if (type1 == long_long_unsigned_type_node) + return long_long_integer_type_node; + return type; +} + +/* Return a type the same as TYPE except unsigned or + signed according to UNSIGNEDP. */ + +tree +signed_or_unsigned_type (unsignedp, type) + int unsignedp; + tree type; +{ + if (TREE_CODE (type) != INTEGER_TYPE) + return type; + if (TYPE_PRECISION (type) == TYPE_PRECISION (signed_char_type_node)) + return unsignedp ? unsigned_char_type_node : signed_char_type_node; + if (TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)) + return unsignedp ? unsigned_type_node : integer_type_node; + if (TYPE_PRECISION (type) == TYPE_PRECISION (short_integer_type_node)) + return unsignedp ? short_unsigned_type_node : short_integer_type_node; + if (TYPE_PRECISION (type) == TYPE_PRECISION (long_integer_type_node)) + return unsignedp ? long_unsigned_type_node : long_integer_type_node; + if (TYPE_PRECISION (type) == TYPE_PRECISION (long_long_integer_type_node)) + return (unsignedp ? long_long_unsigned_type_node + : long_long_integer_type_node); + return type; +} + +tree +c_sizeof (type) + tree type; +{ + enum tree_code code = TREE_CODE (type); + tree t; + + if (code == FUNCTION_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids taking the sizeof a function type"); + return size_int (1); + } + if (code == METHOD_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids taking the sizeof a method type"); + return size_int (1); + } + if (code == VOID_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids taking the sizeof a void type"); + return size_int (1); + } + if (code == ERROR_MARK) + return size_int (1); + + /* ARM $5.3.2: ``When applied to a reference, the result is the size of the + referenced object.'' */ + if (code == REFERENCE_TYPE) + type = TREE_TYPE (type); + + /* We couldn't find anything in the ARM or the draft standard that says, + one way or the other, if doing sizeof on something that doesn't have + an object associated with it is correct or incorrect. For example, if + you declare `struct S { char str[16]; };', and in your program do + a `sizeof (S::str)', should we flag that as an error or should we give + the size of it? Since it seems like a reasonable thing to do, we'll go + with giving the value. */ + if (code == OFFSET_TYPE) + type = TREE_TYPE (type); + + /* @@ This also produces an error for a signature ref. + In that case we should be able to do better. */ + if (IS_SIGNATURE (type)) + { + error ("`sizeof' applied to a signature type"); + return size_int (0); + } + + if (TYPE_SIZE (type) == 0) + { + error ("`sizeof' applied to an incomplete type"); + return size_int (0); + } + + /* Convert in case a char is more than one unit. */ + t = size_binop (CEIL_DIV_EXPR, TYPE_SIZE (type), + size_int (TYPE_PRECISION (char_type_node))); + /* size_binop does not put the constant in range, so do it now. */ + if (TREE_CODE (t) == INTEGER_CST && force_fit_type (t, 0)) + TREE_CONSTANT_OVERFLOW (t) = TREE_OVERFLOW (t) = 1; + return t; +} + +tree +c_sizeof_nowarn (type) + tree type; +{ + enum tree_code code = TREE_CODE (type); + tree t; + + if (code == FUNCTION_TYPE + || code == METHOD_TYPE + || code == VOID_TYPE + || code == ERROR_MARK) + return size_int (1); + if (code == REFERENCE_TYPE) + type = TREE_TYPE (type); + + if (TYPE_SIZE (type) == 0) + { + /* ??? Tiemann, why have any diagnostic here? + There is none in the corresponding function for C. */ + warning ("sizeof applied to an incomplete type"); + return size_int (0); + } + + /* Convert in case a char is more than one unit. */ + t = size_binop (CEIL_DIV_EXPR, TYPE_SIZE (type), + size_int (TYPE_PRECISION (char_type_node))); + force_fit_type (t, 0); + return t; +} + +/* Implement the __alignof keyword: Return the minimum required + alignment of TYPE, measured in bytes. */ + +tree +c_alignof (type) + tree type; +{ + enum tree_code code = TREE_CODE (type); + tree t; + + if (code == FUNCTION_TYPE || code == METHOD_TYPE) + return size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT); + + if (code == VOID_TYPE || code == ERROR_MARK) + return size_int (1); + + /* C++: this is really correct! */ + if (code == REFERENCE_TYPE) + type = TREE_TYPE (type); + + /* @@ This also produces an error for a signature ref. + In that case we should be able to do better. */ + if (IS_SIGNATURE (type)) + { + error ("`__alignof' applied to a signature type"); + return size_int (1); + } + + t = size_int (TYPE_ALIGN (type) / BITS_PER_UNIT); + force_fit_type (t, 0); + return t; +} + +/* Perform default promotions for C data used in expressions. + Arrays and functions are converted to pointers; + enumeral types or short or char, to int. + In addition, manifest constants symbols are replaced by their values. + + C++: this will automatically bash references to their target type. */ + +tree +default_conversion (exp) + tree exp; +{ + register tree type = TREE_TYPE (exp); + register enum tree_code code = TREE_CODE (type); + + if (code == OFFSET_TYPE /* || TREE_CODE (exp) == OFFSET_REF */ ) + { + if (TREE_CODE (exp) == OFFSET_REF) + return default_conversion (resolve_offset_ref (exp)); + + type = TREE_TYPE (type); + code = TREE_CODE (type); + } + + if (code == REFERENCE_TYPE) + { + exp = convert_from_reference (exp); + type = TREE_TYPE (exp); + code = TREE_CODE (type); + } + + /* Constants can be used directly unless they're not loadable. */ + if (TREE_CODE (exp) == CONST_DECL) + exp = DECL_INITIAL (exp); + /* Replace a nonvolatile const static variable with its value. */ + else if (TREE_READONLY_DECL_P (exp) && DECL_MODE (exp) != BLKmode) + { + exp = decl_constant_value (exp); + type = TREE_TYPE (exp); + } + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Leave such NOP_EXPRs, since RHS is being used in non-lvalue context. */ + + /* Normally convert enums to int, + but convert wide enums to something wider. */ + if (code == ENUMERAL_TYPE) + { + type = type_for_size (MAX (TYPE_PRECISION (type), + TYPE_PRECISION (integer_type_node)), + ((flag_traditional + || TYPE_PRECISION (type) >= TYPE_PRECISION (integer_type_node)) + && TREE_UNSIGNED (type))); + return convert (type, exp); + } + + if (C_PROMOTING_INTEGER_TYPE_P (type)) + { + /* Traditionally, unsignedness is preserved in default promotions. + Otherwise, retain unsignedness if really not getting bigger. */ + if (TREE_UNSIGNED (type) + && (flag_traditional + || TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node))) + return convert (unsigned_type_node, exp); + return convert (integer_type_node, exp); + } + if (flag_traditional + && TYPE_MAIN_VARIANT (type) == float_type_node) + return convert (double_type_node, exp); + if (code == VOID_TYPE) + { + error ("void value not ignored as it ought to be"); + return error_mark_node; + } + if (code == FUNCTION_TYPE) + { + return build_unary_op (ADDR_EXPR, exp, 0); + } + if (code == METHOD_TYPE) + { + if (TREE_CODE (exp) == OFFSET_REF) + { + my_friendly_assert (TREE_CODE (TREE_OPERAND (exp, 1)) == FUNCTION_DECL, + 308); + return build_unary_op (ADDR_EXPR, TREE_OPERAND (exp, 1), 0); + } + return build_unary_op (ADDR_EXPR, exp, 0); + } + if (code == ARRAY_TYPE) + { + register tree adr; + tree restype; + tree ptrtype; + int constp, volatilep; + + if (TREE_CODE (exp) == INDIRECT_REF) + { + /* Stripping away the INDIRECT_REF is not the right + thing to do for references... */ + tree inner = TREE_OPERAND (exp, 0); + if (TREE_CODE (TREE_TYPE (inner)) == REFERENCE_TYPE) + { + inner = build1 (CONVERT_EXPR, + build_pointer_type (TREE_TYPE (TREE_TYPE (inner))), + inner); + TREE_REFERENCE_EXPR (inner) = 1; + } + return convert (TYPE_POINTER_TO (TREE_TYPE (type)), inner); + } + + if (TREE_CODE (exp) == COMPOUND_EXPR) + { + tree op1 = default_conversion (TREE_OPERAND (exp, 1)); + return build (COMPOUND_EXPR, TREE_TYPE (op1), + TREE_OPERAND (exp, 0), op1); + } + + if (!lvalue_p (exp) + && ! (TREE_CODE (exp) == CONSTRUCTOR && TREE_STATIC (exp))) + { + error ("invalid use of non-lvalue array"); + return error_mark_node; + } + + constp = volatilep = 0; + if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'r' + || TREE_CODE_CLASS (TREE_CODE (exp)) == 'd') + { + constp = TREE_READONLY (exp); + volatilep = TREE_THIS_VOLATILE (exp); + } + + restype = TREE_TYPE (type); + if (TYPE_READONLY (type) || TYPE_VOLATILE (type) + || constp || volatilep) + restype = build_type_variant (restype, + TYPE_READONLY (type) || constp, + TYPE_VOLATILE (type) || volatilep); + ptrtype = build_pointer_type (restype); + + if (TREE_CODE (exp) == VAR_DECL) + { + /* ??? This is not really quite correct + in that the type of the operand of ADDR_EXPR + is not the target type of the type of the ADDR_EXPR itself. + Question is, can this lossage be avoided? */ + adr = build1 (ADDR_EXPR, ptrtype, exp); + if (mark_addressable (exp) == 0) + return error_mark_node; + TREE_CONSTANT (adr) = staticp (exp); + TREE_SIDE_EFFECTS (adr) = 0; /* Default would be, same as EXP. */ + return adr; + } + /* This way is better for a COMPONENT_REF since it can + simplify the offset for a component. */ + adr = build_unary_op (ADDR_EXPR, exp, 1); + return convert (ptrtype, adr); + } + return exp; +} + +tree +build_object_ref (datum, basetype, field) + tree datum, basetype, field; +{ + if (datum == error_mark_node) + return error_mark_node; + else if (IS_SIGNATURE (IDENTIFIER_TYPE_VALUE (basetype))) + { + warning ("signature name in scope resolution ignored"); + return build_component_ref (datum, field, NULL_TREE, 1); + } + else if (is_aggr_typedef (basetype, 1)) + { + tree real_basetype = IDENTIFIER_TYPE_VALUE (basetype); + if (binfo_or_else (real_basetype, TREE_TYPE (datum))) + return build_component_ref (build_scoped_ref (datum, basetype), + field, NULL_TREE, 1); + } + return error_mark_node; +} + +/* Like `build_component_ref, but uses an already found field. + Must compute access for C_C_D. Otherwise, ok. */ +tree +build_component_ref_1 (datum, field, protect) + tree datum, field; + int protect; +{ + register tree basetype = TREE_TYPE (datum); + register enum tree_code code = TREE_CODE (basetype); + register tree ref; + + if (code == REFERENCE_TYPE) + { + datum = convert_from_reference (datum); + basetype = TREE_TYPE (datum); + code = TREE_CODE (basetype); + } + + if (! IS_AGGR_TYPE_CODE (code)) + { + if (code != ERROR_MARK) + cp_error ("request for member `%D' in `%E', which is of non-aggregate type `%T'", + field, datum, basetype); + return error_mark_node; + } + + if (TYPE_SIZE (basetype) == 0) + { + incomplete_type_error (0, basetype); + return error_mark_node; + } + + /* Look up component name in the structure type definition. */ + + if (field == error_mark_node) + my_friendly_abort (115); + + if (TREE_STATIC (field)) + return field; + + if (datum == C_C_D) + { + enum access_type access + = compute_access (TYPE_BINFO (current_class_type), field); + + if (access == access_private) + { + cp_error ("field `%D' is private", field); + return error_mark_node; + } + else if (access == access_protected) + { + cp_error ("field `%D' is protected", field); + return error_mark_node; + } + } + + ref = build (COMPONENT_REF, TREE_TYPE (field), datum, field); + + if (TREE_READONLY (datum) || TREE_READONLY (field)) + TREE_READONLY (ref) = 1; + if (TREE_THIS_VOLATILE (datum) || TREE_THIS_VOLATILE (field)) + TREE_THIS_VOLATILE (ref) = 1; + if (DECL_MUTABLE_P (field)) + TREE_READONLY (ref) = 0; + + return ref; +} + +/* Given a COND_EXPR in T, return it in a form that we can, for + example, use as an lvalue. This code used to be in unary_complex_lvalue, + but we needed it to deal with `a = (d == c) ? b : c' expressions, where + we're dealing with aggregates. So, we now call this in unary_complex_lvalue, + and in build_modify_expr. The case (in particular) that led to this was + with CODE == ADDR_EXPR, since it's not an lvalue when we'd get it there. */ +static tree +rationalize_conditional_expr (code, t) + enum tree_code code; + tree t; +{ + return + build_conditional_expr (TREE_OPERAND (t, 0), + build_unary_op (code, TREE_OPERAND (t, 1), 0), + build_unary_op (code, TREE_OPERAND (t, 2), 0)); +} + +tree +build_component_ref (datum, component, basetype_path, protect) + tree datum, component, basetype_path; + int protect; +{ + register tree basetype = TREE_TYPE (datum); + register enum tree_code code = TREE_CODE (basetype); + register tree field = NULL; + register tree ref; + + /* If DATUM is a COMPOUND_EXPR or COND_EXPR, move our reference inside it + unless we are not to support things not strictly ANSI. */ + switch (TREE_CODE (datum)) + { + case COMPOUND_EXPR: + { + tree value = build_component_ref (TREE_OPERAND (datum, 1), component, + basetype_path, protect); + return build (COMPOUND_EXPR, TREE_TYPE (value), + TREE_OPERAND (datum, 0), value); + } + case COND_EXPR: + return build_conditional_expr + (TREE_OPERAND (datum, 0), + build_component_ref (TREE_OPERAND (datum, 1), component, + basetype_path, protect), + build_component_ref (TREE_OPERAND (datum, 2), component, + basetype_path, protect)); + } + + if (code == REFERENCE_TYPE) + { +#if 0 + /* TREE_REFERENCE_EXPRs are not converted by `convert_from_reference'. + @@ Maybe that is not right. */ + if (TREE_REFERENCE_EXPR (datum)) + datum = build1 (INDIRECT_REF, TREE_TYPE (basetype), datum); + else +#endif + datum = convert_from_reference (datum); + basetype = TREE_TYPE (datum); + code = TREE_CODE (basetype); + } + + /* First, see if there is a field or component with name COMPONENT. */ + if (TREE_CODE (component) == TREE_LIST) + { + my_friendly_assert (!(TREE_CHAIN (component) == NULL_TREE + && DECL_CHAIN (TREE_VALUE (component)) == NULL_TREE), 309); + return build (COMPONENT_REF, TREE_TYPE (component), datum, component); + } + if (TREE_CODE (component) == TYPE_EXPR) + return build_component_type_expr (datum, component, NULL_TREE, protect); + + if (! IS_AGGR_TYPE_CODE (code)) + { + if (code != ERROR_MARK) + cp_error ("request for member `%D' in `%E', which is of non-aggregate type `%T'", + component, datum, basetype); + return error_mark_node; + } + + if (TYPE_SIZE (basetype) == 0) + { + incomplete_type_error (0, basetype); + return error_mark_node; + } + + if (TREE_CODE (component) == BIT_NOT_EXPR) + { + if (TYPE_IDENTIFIER (basetype) != TREE_OPERAND (component, 0)) + { + cp_error ("destructor specifier `%T::~%T' must have matching names", + basetype, TREE_OPERAND (component, 0)); + return error_mark_node; + } + if (! TYPE_HAS_DESTRUCTOR (basetype)) + { + cp_error ("type `%T' has no destructor", basetype); + return error_mark_node; + } + return TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (basetype), 0); + } + + /* Look up component name in the structure type definition. */ + if (CLASSTYPE_VFIELD (basetype) + && DECL_NAME (CLASSTYPE_VFIELD (basetype)) == component) + /* Special-case this because if we use normal lookups in an ambiguous + hierarchy, the compiler will abort (because vptr lookups are + not supposed to be ambiguous. */ + field = CLASSTYPE_VFIELD (basetype); + else + { + if (basetype_path == NULL_TREE) + basetype_path = TYPE_BINFO (basetype); + field = lookup_field (basetype_path, component, + protect && ! VFIELD_NAME_P (component), 0); + if (field == error_mark_node) + return error_mark_node; + + if (field == NULL_TREE) + { + /* Not found as a data field, look for it as a method. If found, + then if this is the only possible one, return it, else + report ambiguity error. */ + tree fndecls = lookup_fnfields (basetype_path, component, 1); + if (fndecls == error_mark_node) + return error_mark_node; + if (fndecls) + { + if (TREE_CHAIN (fndecls) == NULL_TREE + && DECL_CHAIN (TREE_VALUE (fndecls)) == NULL_TREE) + { + enum access_type access; + tree fndecl; + + /* Unique, so use this one now. */ + basetype = TREE_PURPOSE (fndecls); + fndecl = TREE_VALUE (fndecls); + access = compute_access (TREE_PURPOSE (fndecls), fndecl); + if (access == access_public) + { + if (DECL_VINDEX (fndecl) + && ! resolves_to_fixed_type_p (datum, 0)) + { + tree addr = build_unary_op (ADDR_EXPR, datum, 0); + addr = convert_pointer_to (DECL_CONTEXT (fndecl), addr); + datum = build_indirect_ref (addr, NULL_PTR); + my_friendly_assert (datum != error_mark_node, 310); + fndecl = build_vfn_ref (&addr, datum, DECL_VINDEX (fndecl)); + } + return fndecl; + } + if (access == access_protected) + cp_error ("member function `%D' is protected", fndecl); + else + cp_error ("member function `%D' is private", fndecl); + return error_mark_node; + } + else + return build (COMPONENT_REF, unknown_type_node, datum, fndecls); + } + + if (component == ansi_opname[(int) TYPE_EXPR]) + cp_error ("`%#T' has no such type conversion operator", basetype); + else + cp_error ("`%#T' has no member named `%D'", basetype, component); + return error_mark_node; + } + else if (TREE_TYPE (field) == error_mark_node) + return error_mark_node; + + if (TREE_CODE (field) != FIELD_DECL) + { + if (TREE_CODE (field) == TYPE_DECL) + { + cp_error ("invalid use of type decl `%#D' as expression", field); + return error_mark_node; + } + if (DECL_RTL (field) != 0) + assemble_external (field); + TREE_USED (field) = 1; + return field; + } + } + + if (DECL_FIELD_CONTEXT (field) != basetype + && TYPE_USES_COMPLEX_INHERITANCE (basetype)) + { + tree addr = build_unary_op (ADDR_EXPR, datum, 0); + if (integer_zerop (addr)) + { + error ("invalid reference to NULL ptr, use ptr-to-member instead"); + return error_mark_node; + } + addr = convert_pointer_to (DECL_FIELD_CONTEXT (field), addr); + datum = build_indirect_ref (addr, NULL_PTR); + my_friendly_assert (datum != error_mark_node, 311); + } + ref = build (COMPONENT_REF, TREE_TYPE (field), break_out_cleanups (datum), field); + + if (TREE_READONLY (datum) || TREE_READONLY (field)) + TREE_READONLY (ref) = 1; + if (TREE_THIS_VOLATILE (datum) || TREE_THIS_VOLATILE (field)) + TREE_THIS_VOLATILE (ref) = 1; + if (DECL_MUTABLE_P (field)) + TREE_READONLY (ref) = 0; + + return ref; +} + +/* Given an expression PTR for a pointer, return an expression + for the value pointed to. + ERRORSTRING is the name of the operator to appear in error messages. + + This function may need to overload OPERATOR_FNNAME. + Must also handle REFERENCE_TYPEs for C++. */ + +tree +build_x_indirect_ref (ptr, errorstring) + tree ptr; + char *errorstring; +{ + tree rval = build_opfncall (INDIRECT_REF, LOOKUP_NORMAL, ptr, NULL_TREE, NULL_TREE); + if (rval) + return rval; + return build_indirect_ref (ptr, errorstring); +} + +tree +build_indirect_ref (ptr, errorstring) + tree ptr; + char *errorstring; +{ + register tree pointer = default_conversion (ptr); + register tree type = TREE_TYPE (pointer); + + if (ptr == current_class_decl) + return C_C_D; + + if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE) + { + if (TREE_CODE (pointer) == ADDR_EXPR + && (TREE_TYPE (TREE_OPERAND (pointer, 0)) + == TREE_TYPE (type))) + return TREE_OPERAND (pointer, 0); + else + { + tree t = TREE_TYPE (type); + register tree ref = build1 (INDIRECT_REF, + TYPE_MAIN_VARIANT (t), pointer); + + TREE_READONLY (ref) = TYPE_READONLY (t); + TREE_THIS_VOLATILE (ref) = TYPE_VOLATILE (t); + TREE_SIDE_EFFECTS (ref) + = TYPE_VOLATILE (t) || TREE_SIDE_EFFECTS (pointer); + return ref; + } + } + /* `pointer' won't be an error_mark_node if we were given a + pointer to member, so it's cool to check for this here. */ + else if (TYPE_PTRMEMFUNC_P (type)) + error ("invalid use of `%s' on pointer to member function", errorstring); + else if (TREE_CODE (type) == RECORD_TYPE + && (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type))) + error ("cannot dereference signature pointer/reference"); + else if (pointer != error_mark_node) + { + if (errorstring) + error ("invalid type argument of `%s'", errorstring); + else + error ("invalid type argument"); + } + return error_mark_node; +} + +/* This handles expressions of the form "a[i]", which denotes + an array reference. + + This is logically equivalent in C to *(a+i), but we may do it differently. + If A is a variable or a member, we generate a primitive ARRAY_REF. + This avoids forcing the array out of registers, and can work on + arrays that are not lvalues (for example, members of structures returned + by functions). + + If INDEX is of some user-defined type, it must be converted to + integer type. Otherwise, to make a compatible PLUS_EXPR, it + will inherit the type of the array, which will be some pointer type. */ + +tree +build_x_array_ref (array, index) + tree array, index; +{ + tree rval = build_opfncall (ARRAY_REF, LOOKUP_NORMAL, array, index, NULL_TREE); + if (rval) + return rval; + return build_array_ref (array, index); +} + +tree +build_array_ref (array, idx) + tree array, idx; +{ + tree itype; + + if (idx == 0) + { + error ("subscript missing in array reference"); + return error_mark_node; + } + + if (TREE_TYPE (array) == error_mark_node + || TREE_TYPE (idx) == error_mark_node) + return error_mark_node; + + itype = TREE_TYPE (idx); + /* We must check here for the reference, so we can do the possible + conversions immediately afterwards. */ + if (TREE_CODE (itype) == REFERENCE_TYPE) + { + idx = convert_from_reference (idx); + itype = TREE_TYPE (idx); + } + + if (IS_AGGR_TYPE (itype)) + { + if (TYPE_HAS_INT_CONVERSION (itype)) + idx = build_type_conversion (CONVERT_EXPR, + integer_type_node, idx, 1); + else + { + error_with_aggr_type (itype, + "type `%s' requires integer conversion for array indexing"); + return error_mark_node; + } + } + + if (TREE_CODE (TREE_TYPE (array)) == ARRAY_TYPE + && TREE_CODE (array) != INDIRECT_REF) + { + tree rval, type; + + /* Subscripting with type char is likely to lose + on a machine where chars are signed. + So warn on any machine, but optionally. + Don't warn for unsigned char since that type is safe. + Don't warn for signed char because anyone who uses that + must have done so deliberately. */ + if (warn_char_subscripts + && TYPE_MAIN_VARIANT (TREE_TYPE (idx)) == char_type_node) + warning ("array subscript has type `char'"); + + /* Apply default promotions *after* noticing character types. */ + idx = default_conversion (idx); + + if (TREE_CODE (TREE_TYPE (idx)) != INTEGER_TYPE) + { + error ("array subscript is not an integer"); + return error_mark_node; + } + + /* An array that is indexed by a non-constant + cannot be stored in a register; we must be able to do + address arithmetic on its address. + Likewise an array of elements of variable size. */ + if (TREE_CODE (idx) != INTEGER_CST + || (TYPE_SIZE (TREE_TYPE (TREE_TYPE (array))) != 0 + && TREE_CODE (TYPE_SIZE (TREE_TYPE (TREE_TYPE (array)))) != INTEGER_CST)) + { + if (mark_addressable (array) == 0) + return error_mark_node; + } + /* An array that is indexed by a constant value which is not within + the array bounds cannot be stored in a register either; because we + would get a crash in store_bit_field/extract_bit_field when trying + to access a non-existent part of the register. */ + if (TREE_CODE (idx) == INTEGER_CST + && TYPE_VALUES (TREE_TYPE (array)) + && ! int_fits_type_p (idx, TYPE_VALUES (TREE_TYPE (array)))) + { + if (mark_addressable (array) == 0) + return error_mark_node; + } + + /* Note in C++ we don't bother warning about subscripting a + `register' array, since it's legal in C++ to take the address + of something with that storage specification. */ + if (pedantic && !lvalue_p (array)) + pedwarn ("ANSI C++ forbids subscripting non-lvalue array"); + + if (pedantic) + { + tree foo = array; + while (TREE_CODE (foo) == COMPONENT_REF) + foo = TREE_OPERAND (foo, 0); + if (TREE_CODE (foo) == VAR_DECL && DECL_REGISTER (foo)) + pedwarn ("ANSI C++ forbids subscripting non-lvalue array"); + } + + type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (array))); + rval = build (ARRAY_REF, type, array, idx); + /* Array ref is const/volatile if the array elements are + or if the array is.. */ + TREE_READONLY (rval) + |= (TYPE_READONLY (TREE_TYPE (TREE_TYPE (array))) + | TREE_READONLY (array)); + TREE_SIDE_EFFECTS (rval) + |= (TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (array))) + | TREE_SIDE_EFFECTS (array)); + TREE_THIS_VOLATILE (rval) + |= (TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (array))) + /* This was added by rms on 16 Nov 91. + It fixes vol struct foo *a; a->elts[1] + in an inline function. + Hope it doesn't break something else. */ + | TREE_THIS_VOLATILE (array)); + return require_complete_type (fold (rval)); + } + + { + tree ar = default_conversion (array); + tree ind = default_conversion (idx); + + /* Put the integer in IND to simplify error checking. */ + if (TREE_CODE (TREE_TYPE (ar)) == INTEGER_TYPE) + { + tree temp = ar; + ar = ind; + ind = temp; + } + + if (ar == error_mark_node) + return ar; + + if (TREE_CODE (TREE_TYPE (ar)) != POINTER_TYPE) + { + error ("subscripted value is neither array nor pointer"); + return error_mark_node; + } + if (TREE_CODE (TREE_TYPE (ind)) != INTEGER_TYPE) + { + error ("array subscript is not an integer"); + return error_mark_node; + } + + return build_indirect_ref (build_binary_op_nodefault (PLUS_EXPR, ar, ind, PLUS_EXPR), + "array indexing"); + } +} + +/* Build a function call to function FUNCTION with parameters PARAMS. + PARAMS is a list--a chain of TREE_LIST nodes--in which the + TREE_VALUE of each node is a parameter-expression. + FUNCTION's data type may be a function type or a pointer-to-function. + + For C++: If FUNCTION's data type is a TREE_LIST, then the tree list + is the list of possible methods that FUNCTION could conceivably + be. If the list of methods comes from a class, then it will be + a list of lists (where each element is associated with the class + that produced it), otherwise it will be a simple list (for + functions overloaded in global scope). + + In the first case, TREE_VALUE (function) is the head of one of those + lists, and TREE_PURPOSE is the name of the function. + + In the second case, TREE_PURPOSE (function) is the function's + name directly. + + DECL is the class instance variable, usually CURRENT_CLASS_DECL. */ + +/* + * [eichin:19911015.1726EST] actually return a possibly incomplete + * type + */ +tree +build_x_function_call (function, params, decl) + tree function, params, decl; +{ + tree type; + int is_method; + + if (function == error_mark_node) + return error_mark_node; + + type = TREE_TYPE (function); + is_method = ((TREE_CODE (function) == TREE_LIST + && current_class_type != NULL_TREE + && IDENTIFIER_CLASS_VALUE (TREE_PURPOSE (function)) == function) + || TREE_CODE (function) == IDENTIFIER_NODE + || TREE_CODE (type) == METHOD_TYPE + || TYPE_PTRMEMFUNC_P (type)); + + /* Handle methods, friends, and overloaded functions, respectively. */ + if (is_method) + { + if (TREE_CODE (function) == FUNCTION_DECL) + { + if (DECL_NAME (function)) + function = DECL_NAME (function); + else + function = TYPE_IDENTIFIER (DECL_CLASS_CONTEXT (function)); + } + else if (TREE_CODE (function) == TREE_LIST) + { +#if 0 + if (TREE_CODE (TREE_VALUE (function)) == TREE_LIST) + function = TREE_PURPOSE (TREE_VALUE (function)); + else + function = TREE_PURPOSE (function); +#else + my_friendly_assert (TREE_CODE (TREE_VALUE (function)) == FUNCTION_DECL, 312); + function = TREE_PURPOSE (function); +#endif + } + else if (TREE_CODE (function) != IDENTIFIER_NODE) + { + if (TREE_CODE (function) == OFFSET_REF) + { + if (TREE_OPERAND (function, 0)) + decl = TREE_OPERAND (function, 0); + } + /* Call via a pointer to member function. */ + if (decl == NULL_TREE) + { + error ("pointer to member function called, but not in class scope"); + return error_mark_node; + } + /* What other type of POINTER_TYPE could this be? */ + if (TREE_CODE (TREE_TYPE (function)) != POINTER_TYPE + && ! TYPE_PTRMEMFUNC_P (TREE_TYPE (function)) + && TREE_CODE (function) != OFFSET_REF) + function = build (OFFSET_REF, TREE_TYPE (type), NULL_TREE, function); + goto do_x_function; + } + + /* this is an abbreviated method call. + must go through here in case it is a virtual function. + @@ Perhaps this could be optimized. */ + + if (decl == NULL_TREE) + { + if (current_class_type == NULL_TREE) + { + error ("object missing in call to method `%s'", + IDENTIFIER_POINTER (function)); + return error_mark_node; + } + /* Yow: call from a static member function. */ + decl = build1 (NOP_EXPR, TYPE_POINTER_TO (current_class_type), + error_mark_node); + decl = build_indirect_ref (decl, NULL_PTR); + } + + return build_method_call (decl, function, params, + NULL_TREE, LOOKUP_NORMAL); + } + else if (TREE_CODE (function) == COMPONENT_REF + && type == unknown_type_node) + { + /* Should we undo what was done in build_component_ref? */ + if (TREE_CODE (TREE_PURPOSE (TREE_OPERAND (function, 1))) == TREE_VEC) + /* Get the name that build_component_ref hid. */ + function = DECL_NAME (TREE_VALUE (TREE_OPERAND (function, 1))); + else + function = TREE_PURPOSE (TREE_OPERAND (function, 1)); + return build_method_call (decl, function, params, + NULL_TREE, LOOKUP_NORMAL); + } + else if (TREE_CODE (function) == TREE_LIST) + { + if (TREE_VALUE (function) == NULL_TREE) + { + cp_error ("function `%D' declared overloaded, but no definitions appear with which to resolve it?!?", + TREE_PURPOSE (function)); + return error_mark_node; + } + else + { + tree id = TREE_PURPOSE (function); + function = TREE_VALUE (function); + + if (TREE_CODE (function) == TEMPLATE_DECL) + return build_overload_call_maybe + (id, params, LOOKUP_COMPLAIN, (struct candidate *)0); + else if (DECL_CHAIN (function) != NULL_TREE) + return build_overload_call + (id, params, LOOKUP_COMPLAIN, (struct candidate *)0); + /* else fall out */ + } + } + + do_x_function: + if (TREE_CODE (function) == OFFSET_REF) + { + /* If the component is a data element (or a virtual function), we play + games here to make things work. */ + tree decl_addr; + + if (TREE_OPERAND (function, 0)) + decl = TREE_OPERAND (function, 0); + else + decl = C_C_D; + + decl_addr = build_unary_op (ADDR_EXPR, decl, 0); + function = get_member_function_from_ptrfunc (&decl_addr, decl, + TREE_OPERAND (function, 1)); + params = tree_cons (NULL_TREE, decl_addr, params); + return build_function_call (function, params); + } + + type = TREE_TYPE (function); + if (type != error_mark_node) + { + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + if (TYPE_LANG_SPECIFIC (type) && TYPE_OVERLOADS_CALL_EXPR (type)) + return build_opfncall (CALL_EXPR, LOOKUP_NORMAL, function, params, NULL_TREE); + } + + if (is_method) + { + tree fntype = TREE_TYPE (function); + tree ctypeptr; + + /* Explicitly named method? */ + if (TREE_CODE (function) == FUNCTION_DECL) + ctypeptr = TYPE_POINTER_TO (DECL_CLASS_CONTEXT (function)); + /* Expression with ptr-to-method type? It could either be a plain + usage, or it might be a case where the ptr-to-method is being + passed in as an argument. */ + else if (TYPE_PTRMEMFUNC_P (fntype)) + { + tree rec = TYPE_METHOD_BASETYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (fntype))); + ctypeptr = TYPE_POINTER_TO (rec); + } + /* Unexpected node type? */ + else + my_friendly_abort (116); + if (decl == NULL_TREE) + { + if (current_function_decl + && DECL_STATIC_FUNCTION_P (current_function_decl)) + error ("invalid call to member function needing `this' in static member function scope"); + else + error ("pointer to member function called, but not in class scope"); + return error_mark_node; + } + if (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE + && ! TYPE_PTRMEMFUNC_P (TREE_TYPE (decl))) + { + decl = build_unary_op (ADDR_EXPR, decl, 0); + decl = convert_pointer_to (TREE_TYPE (ctypeptr), decl); + } + else + decl = build_c_cast (ctypeptr, decl); + params = tree_cons (NULL_TREE, decl, params); + } + + return build_function_call (function, params); +} + +/* Resolve a pointer to member function. INSTANCE is the object + instance to use, if the member points to a virtual member. */ + +tree +get_member_function_from_ptrfunc (instance_ptrptr, instance, function) + tree *instance_ptrptr; + tree instance; + tree function; +{ + if (TREE_CODE (function) == OFFSET_REF) + { + function = TREE_OPERAND (function, 1); + } + + if (TYPE_PTRMEMFUNC_P (TREE_TYPE (function))) + { + tree fntype = TYPE_PTRMEMFUNC_FN_TYPE (TREE_TYPE (function)); + tree index = save_expr (convert (integer_type_node, + build_component_ref (function, + index_identifier, + 0, 0))); + tree e1 = build (GT_EXPR, integer_type_node, index, integer_zero_node); + tree delta = build_component_ref (function, delta_identifier, 0, 0); + tree delta2 = DELTA2_FROM_PTRMEMFUNC (function); + tree e2; + tree e3; + tree aref, vtbl; + + vtbl = build1 (ADDR_EXPR, ptr_type_node, instance); + vtbl = build (PLUS_EXPR, + build_pointer_type (build_pointer_type (vtable_entry_type)), + vtbl, convert (sizetype, delta2)); + vtbl = build_indirect_ref (vtbl, NULL_PTR); + aref = build_array_ref (vtbl, size_binop (MINUS_EXPR, + index, + integer_one_node)); + aref = save_expr (aref); + + /* Save the intermediate result in a SAVE_EXPR so we don't have to + compute each component of the virtual function pointer twice. */ + if (/* !building_cleanup && */ TREE_CODE (aref) == INDIRECT_REF) + TREE_OPERAND (aref, 0) = save_expr (TREE_OPERAND (aref, 0)); + + delta = build (PLUS_EXPR, integer_type_node, + build_conditional_expr (e1, build_component_ref (aref, delta_identifier, 0, 0), integer_zero_node), + delta); + + *instance_ptrptr = build (PLUS_EXPR, TREE_TYPE (*instance_ptrptr), + *instance_ptrptr, + convert (integer_type_node, delta)); + e2 = build_component_ref (aref, pfn_identifier, 0, 0); + + e3 = PFN_FROM_PTRMEMFUNC (function); + TREE_TYPE (e2) = TREE_TYPE (e3); + function = build_conditional_expr (e1, e2, e3); + } + return function; +} + +tree +build_function_call_real (function, params, require_complete, flags) + tree function, params; + int require_complete, flags; +{ + register tree fntype, fndecl; + register tree value_type; + register tree coerced_params; + tree name = NULL_TREE, assembler_name = NULL_TREE; + int is_method; + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since FUNCTION is used in non-lvalue context. */ + if (TREE_CODE (function) == NOP_EXPR + && TREE_TYPE (function) == TREE_TYPE (TREE_OPERAND (function, 0))) + function = TREE_OPERAND (function, 0); + + if (TREE_CODE (function) == FUNCTION_DECL) + { + name = DECL_NAME (function); + assembler_name = DECL_ASSEMBLER_NAME (function); + + GNU_xref_call (current_function_decl, + IDENTIFIER_POINTER (name ? name + : TYPE_IDENTIFIER (DECL_CLASS_CONTEXT (function)))); + assemble_external (function); + fndecl = function; + + /* Convert anything with function type to a pointer-to-function. */ + if (pedantic + && name + && IDENTIFIER_LENGTH (name) == 4 + && ! strcmp (IDENTIFIER_POINTER (name), "main") + && DECL_CONTEXT (function) == NULL_TREE) + { + pedwarn ("ANSI C++ forbids calling `main' from within program"); + } + + /* Differs from default_conversion by not setting TREE_ADDRESSABLE + (because calling an inline function does not mean the function + needs to be separately compiled). */ + + if (DECL_INLINE (function)) + { + fntype = build_type_variant (TREE_TYPE (function), + TREE_READONLY (function), + TREE_THIS_VOLATILE (function)); + function = build1 (ADDR_EXPR, build_pointer_type (fntype), function); + } + else + { + assemble_external (function); + TREE_USED (function) = 1; + function = default_conversion (function); + } + } + else + { + fndecl = NULL_TREE; + + /* Convert anything with function type to a pointer-to-function. */ + if (function == error_mark_node) + return error_mark_node; + function = default_conversion (function); + } + + fntype = TREE_TYPE (function); + + if (TYPE_PTRMEMFUNC_P (fntype)) + { + tree instance_ptr = build_unary_op (ADDR_EXPR, C_C_D, 0); + fntype = TYPE_PTRMEMFUNC_FN_TYPE (fntype); + function = get_member_function_from_ptrfunc (&instance_ptr, C_C_D, function); + } + + is_method = (TREE_CODE (fntype) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (fntype)) == METHOD_TYPE); + + if (!((TREE_CODE (fntype) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (fntype)) == FUNCTION_TYPE) + || is_method)) + { + error ("called object is not a function"); + return error_mark_node; + } + + /* fntype now gets the type of function pointed to. */ + fntype = TREE_TYPE (fntype); + + /* Convert the parameters to the types declared in the + function prototype, or apply default promotions. */ + + if (flags & LOOKUP_COMPLAIN) + coerced_params = convert_arguments (NULL_TREE, TYPE_ARG_TYPES (fntype), + params, fndecl, LOOKUP_NORMAL); + else + coerced_params = convert_arguments (NULL_TREE, TYPE_ARG_TYPES (fntype), + params, fndecl, 0); + + /* Check for errors in format strings. */ + + if (warn_format && (name || assembler_name)) + check_function_format (name, assembler_name, coerced_params); + + /* Recognize certain built-in functions so we can make tree-codes + other than CALL_EXPR. We do this when it enables fold-const.c + to do something useful. */ + + if (TREE_CODE (function) == ADDR_EXPR + && TREE_CODE (TREE_OPERAND (function, 0)) == FUNCTION_DECL + && DECL_BUILT_IN (TREE_OPERAND (function, 0))) + switch (DECL_FUNCTION_CODE (TREE_OPERAND (function, 0))) + { + case BUILT_IN_ABS: + case BUILT_IN_LABS: + case BUILT_IN_FABS: + if (coerced_params == 0) + return integer_zero_node; + return build_unary_op (ABS_EXPR, TREE_VALUE (coerced_params), 0); + } + + /* C++ */ + value_type = TREE_TYPE (fntype) ? TREE_TYPE (fntype) : void_type_node; + { + register tree result = + build (CALL_EXPR, value_type, + function, coerced_params, NULL_TREE); + + TREE_SIDE_EFFECTS (result) = 1; + TREE_RAISES (result) |= !! TYPE_RAISES_EXCEPTIONS (fntype); + if (! require_complete) + return result; + if (value_type == void_type_node) + return result; + return require_complete_type (result); + } +} + +tree +build_function_call (function, params) + tree function, params; +{ + return build_function_call_real (function, params, 1, 0); +} + +tree +build_function_call_maybe (function, params) + tree function, params; +{ + return build_function_call_real (function, params, 0, 0); +} + + +/* Convert the actual parameter expressions in the list VALUES + to the types in the list TYPELIST. + If parmdecls is exhausted, or when an element has NULL as its type, + perform the default conversions. + + RETURN_LOC is the location of the return value, if known, NULL_TREE + otherwise. This is useful in the case where we can avoid creating + a temporary variable in the case where we can initialize the return + value directly. If we are not eliding constructors, then we set this + to NULL_TREE to avoid this avoidance. + + NAME is an IDENTIFIER_NODE or 0. It is used only for error messages. + + This is also where warnings about wrong number of args are generated. + + Return a list of expressions for the parameters as converted. + + Both VALUES and the returned value are chains of TREE_LIST nodes + with the elements of the list in the TREE_VALUE slots of those nodes. + + In C++, unspecified trailing parameters can be filled in with their + default arguments, if such were specified. Do so here. */ + +tree +convert_arguments (return_loc, typelist, values, fndecl, flags) + tree return_loc, typelist, values, fndecl; + int flags; +{ + extern tree gc_protect_fndecl; + register tree typetail, valtail; + register tree result = NULL_TREE; + char *called_thing; + int maybe_raises = 0; + int i = 0; + + if (! flag_elide_constructors) + return_loc = 0; + + if (fndecl) + { + if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE) + { + if (DECL_NAME (fndecl) == NULL_TREE + || IDENTIFIER_HAS_TYPE_VALUE (DECL_NAME (fndecl))) + called_thing = "constructor"; + else + called_thing = "member function"; + i -= 1; + } + else + { + called_thing = "function"; + } + } + + for (valtail = values, typetail = typelist; + valtail; + valtail = TREE_CHAIN (valtail), i++) + { + register tree type = typetail ? TREE_VALUE (typetail) : 0; + register tree val = TREE_VALUE (valtail); + + if (type == void_type_node) + { + if (fndecl) + { + char *buf = (char *)alloca (40 + strlen (called_thing)); + sprintf (buf, "too many arguments to %s `%%s'", called_thing); + error_with_decl (fndecl, buf); + error ("at this point in file"); + } + else + error ("too many arguments to function"); + /* In case anybody wants to know if this argument + list is valid. */ + if (result) + TREE_TYPE (tree_last (result)) = error_mark_node; + break; + } + + /* The tree type of the parameter being passed may not yet be + known. In this case, its type is TYPE_UNKNOWN, and will + be instantiated by the type given by TYPE. If TYPE + is also NULL, the tree type of VAL is ERROR_MARK_NODE. */ + if (type && type_unknown_p (val)) + val = require_instantiated_type (type, val, integer_zero_node); + else if (type_unknown_p (val)) + { + /* Strip the `&' from an overloaded FUNCTION_DECL. */ + if (TREE_CODE (val) == ADDR_EXPR) + val = TREE_OPERAND (val, 0); + if (TREE_CODE (val) == TREE_LIST + && TREE_CHAIN (val) == NULL_TREE + && TREE_TYPE (TREE_VALUE (val)) != NULL_TREE + && (TREE_TYPE (val) == unknown_type_node + || DECL_CHAIN (TREE_VALUE (val)) == NULL_TREE)) + /* Instantiates automatically. */ + val = TREE_VALUE (val); + else + { + error ("insufficient type information in parameter list"); + val = integer_zero_node; + } + } + else if (TREE_CODE (val) == OFFSET_REF) + val = resolve_offset_ref (val); + + { +#if 0 + /* This code forces the assumption that if we have a ptr-to-func + type in an arglist, that every routine that wants to check + its validity has done so, and thus we need not do any + more conversion. I don't remember why this is necessary. */ + else if (TREE_CODE (ttype) == FUNCTION_TYPE + && (type == NULL + || TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)) + { + type = build_pointer_type (ttype); + } +#endif + } + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since VAL is used in non-lvalue context. */ + if (TREE_CODE (val) == NOP_EXPR + && TREE_TYPE (val) == TREE_TYPE (TREE_OPERAND (val, 0))) + val = TREE_OPERAND (val, 0); + + if ((type == 0 || TREE_CODE (type) != REFERENCE_TYPE) + && (TREE_CODE (TREE_TYPE (val)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (val)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (val)) == METHOD_TYPE)) + val = default_conversion (val); + + val = require_complete_type (val); + + if (val == error_mark_node) + continue; + + maybe_raises |= TREE_RAISES (val); + + if (type != 0) + { + /* Formal parm type is specified by a function prototype. */ + tree parmval; + + if (TYPE_SIZE (type) == 0) + { + error ("parameter type of called function is incomplete"); + parmval = val; + } + else + { +#ifdef PROMOTE_PROTOTYPES + /* Rather than truncating and then reextending, + convert directly to int, if that's the type we will want. */ + if (! flag_traditional + && (TREE_CODE (type) == INTEGER_TYPE + || TREE_CODE (type) == ENUMERAL_TYPE) + && (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))) + type = integer_type_node; +#endif + parmval = convert_for_initialization (return_loc, type, val, flags, + "argument passing", fndecl, i); +#ifdef PROMOTE_PROTOTYPES + if ((TREE_CODE (type) == INTEGER_TYPE + || TREE_CODE (type) == ENUMERAL_TYPE) + && (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))) + parmval = default_conversion (parmval); +#endif + } + result = tree_cons (NULL_TREE, parmval, result); + } + else + { + if (TREE_CODE (TREE_TYPE (val)) == REFERENCE_TYPE) + val = convert_from_reference (val); + + if (TREE_CODE (TREE_TYPE (val)) == REAL_TYPE + && (TYPE_PRECISION (TREE_TYPE (val)) + < TYPE_PRECISION (double_type_node))) + /* Convert `float' to `double'. */ + result = tree_cons (NULL_TREE, convert (double_type_node, val), result); + else if (TYPE_LANG_SPECIFIC (TREE_TYPE (val)) + && (TYPE_HAS_INIT_REF (TREE_TYPE (val)) + || TYPE_HAS_ASSIGN_REF (TREE_TYPE (val)))) + { + cp_warning ("cannot pass objects of type `%T' through `...'", + TREE_TYPE (val)); + result = tree_cons (NULL_TREE, val, result); + } + else + /* Convert `short' and `char' to full-size `int'. */ + result = tree_cons (NULL_TREE, default_conversion (val), result); + } + + if (flag_gc + /* There are certain functions for which we don't need + to protect our arguments. GC_PROTECT_FNDECL is one. */ + && fndecl != gc_protect_fndecl + && type_needs_gc_entry (TREE_TYPE (TREE_VALUE (result))) + && ! value_safe_from_gc (NULL_TREE, TREE_VALUE (result))) + /* This will build a temporary variable whose cleanup is + to clear the obstack entry. */ + TREE_VALUE (result) = protect_value_from_gc (NULL_TREE, + TREE_VALUE (result)); + + if (typetail) + typetail = TREE_CHAIN (typetail); + } + + if (typetail != 0 && typetail != void_list_node) + { + /* See if there are default arguments that can be used */ + if (TREE_PURPOSE (typetail)) + { + while (typetail != void_list_node) + { + tree type = TREE_VALUE (typetail); + tree val = TREE_PURPOSE (typetail); + tree parmval; + + if (val == NULL_TREE) + parmval = error_mark_node; + else if (TREE_CODE (val) == CONSTRUCTOR) + { + parmval = digest_init (type, val, (tree *)0); + parmval = convert_for_initialization (return_loc, type, parmval, flags, + "default constructor", fndecl, i); + } + else + { + /* This could get clobbered by the following call. */ + if (TREE_HAS_CONSTRUCTOR (val)) + val = copy_node (val); + + parmval = convert_for_initialization (return_loc, type, val, flags, + "default argument", fndecl, i); +#ifdef PROMOTE_PROTOTYPES + if ((TREE_CODE (type) == INTEGER_TYPE + || TREE_CODE (type) == ENUMERAL_TYPE) + && (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))) + parmval = default_conversion (parmval); +#endif + } + maybe_raises |= TREE_RAISES (parmval); + + if (flag_gc + && type_needs_gc_entry (TREE_TYPE (parmval)) + && ! value_safe_from_gc (NULL_TREE, parmval)) + parmval = protect_value_from_gc (NULL_TREE, parmval); + + result = tree_cons (0, parmval, result); + typetail = TREE_CHAIN (typetail); + /* ends with `...'. */ + if (typetail == NULL_TREE) + break; + } + } + else + { + if (fndecl) + { + char *buf = (char *)alloca (32 + strlen (called_thing)); + sprintf (buf, "too few arguments to %s `%%#D'", called_thing); + cp_error_at (buf, fndecl); + error ("at this point in file"); + } + else + error ("too few arguments to function"); + return error_mark_list; + } + } + if (result) + TREE_RAISES (result) = maybe_raises; + + return nreverse (result); +} + +/* Build a binary-operation expression, after performing default + conversions on the operands. CODE is the kind of expression to build. */ + +tree +build_x_binary_op (code, arg1, arg2) + enum tree_code code; + tree arg1, arg2; +{ + tree rval = build_opfncall (code, LOOKUP_SPECULATIVELY, + arg1, arg2, NULL_TREE); + if (rval) + return build_opfncall (code, LOOKUP_NORMAL, arg1, arg2, NULL_TREE); + if (code == MEMBER_REF) + return build_m_component_ref (build_indirect_ref (arg1, NULL_PTR), + arg2); + return build_binary_op (code, arg1, arg2, 1); +} + +tree +build_binary_op (code, arg1, arg2, convert_p) + enum tree_code code; + tree arg1, arg2; + int convert_p; +{ + tree type1, type2; + tree args[2]; + + args[0] = arg1; + args[1] = arg2; + + if (convert_p) + { + args[0] = default_conversion (args[0]); + args[1] = default_conversion (args[1]); + + if (type_unknown_p (args[0])) + { + args[0] = instantiate_type (TREE_TYPE (args[1]), args[0], 1); + args[0] = default_conversion (args[0]); + } + else if (type_unknown_p (args[1])) + { + args[1] = require_instantiated_type (TREE_TYPE (args[0]), + args[1], + error_mark_node); + args[1] = default_conversion (args[1]); + } + + type1 = TREE_TYPE (args[0]); + type2 = TREE_TYPE (args[1]); + + if (IS_AGGR_TYPE_2 (type1, type2) && ! TYPE_PTRMEMFUNC_P (type1)) + { + /* Try to convert this to something reasonable. */ + if (! build_default_binary_type_conversion(code, &args[0], &args[1])) + return error_mark_node; + } + else if ((IS_AGGR_TYPE (type1) && ! TYPE_PTRMEMFUNC_P (type1)) + || (IS_AGGR_TYPE (type2) && ! TYPE_PTRMEMFUNC_P (type2))) + { + int convert_index = IS_AGGR_TYPE (type2); + /* Avoid being tripped up by things like (ARG1 != 0). */ + tree types[2], try; + + types[0] = type1; types[1] = type2; + try = build_type_conversion (code, types[convert_index ^ 1], + args[convert_index], 1); + + if (try == 0 + && args[1] == integer_zero_node + && (code == NE_EXPR || code == EQ_EXPR)) + try = build_type_conversion (code, ptr_type_node, + args[convert_index], 1); + if (try == 0) + { + cp_error ("no match for `%O(%#T, %#T)'", code, + types[convert_index], types[convert_index ^ 1]); + return error_mark_node; + } + if (try == error_mark_node) + error ("ambiguous pointer conversion"); + args[convert_index] = try; + } + } + return build_binary_op_nodefault (code, args[0], args[1], code); +} + +/* Build a binary-operation expression without default conversions. + CODE is the kind of expression to build. + This function differs from `build' in several ways: + the data type of the result is computed and recorded in it, + warnings are generated if arg data types are invalid, + special handling for addition and subtraction of pointers is known, + and some optimization is done (operations on narrow ints + are done in the narrower type when that gives the same result). + Constant folding is also done before the result is returned. + + ERROR_CODE is the code that determines what to say in error messages. + It is usually, but not always, the same as CODE. + + Note that the operands will never have enumeral types + because either they have just had the default conversions performed + or they have both just been converted to some other type in which + the arithmetic is to be done. + + C++: must do special pointer arithmetic when implementing + multiple inheritance, and deal with pointer to member functions. */ + +tree +build_binary_op_nodefault (code, op0, op1, error_code) + enum tree_code code; + tree op0, op1; + enum tree_code error_code; +{ + tree type0 = TREE_TYPE (op0), type1 = TREE_TYPE (op1); + + /* The expression codes of the data types of the arguments tell us + whether the arguments are integers, floating, pointers, etc. */ + register enum tree_code code0 = TREE_CODE (type0); + register enum tree_code code1 = TREE_CODE (type1); + + /* Expression code to give to the expression when it is built. + Normally this is CODE, which is what the caller asked for, + but in some special cases we change it. */ + register enum tree_code resultcode = code; + + /* Data type in which the computation is to be performed. + In the simplest cases this is the common type of the arguments. */ + register tree result_type = NULL; + + /* Nonzero means operands have already been type-converted + in whatever way is necessary. + Zero means they need to be converted to RESULT_TYPE. */ + int converted = 0; + + /* Nonzero means after finally constructing the expression + give it this type. Otherwise, give it type RESULT_TYPE. */ + tree final_type = 0; + + /* Nonzero if this is an operation like MIN or MAX which can + safely be computed in short if both args are promoted shorts. + Also implies COMMON. + -1 indicates a bitwise operation; this makes a difference + in the exact conditions for when it is safe to do the operation + in a narrower mode. */ + int shorten = 0; + + /* Nonzero if this is a comparison operation; + if both args are promoted shorts, compare the original shorts. + Also implies COMMON. */ + int short_compare = 0; + + /* Nonzero if this is a right-shift operation, which can be computed on the + original short and then promoted if the operand is a promoted short. */ + int short_shift = 0; + + /* Nonzero means set RESULT_TYPE to the common type of the args. */ + int common = 0; + + /* Strip NON_LVALUE_EXPRs, etc., since we aren't using as an lvalue. */ + STRIP_TYPE_NOPS (op0); + STRIP_TYPE_NOPS (op1); + + /* If an error was already reported for one of the arguments, + avoid reporting another error. */ + + if (code0 == ERROR_MARK || code1 == ERROR_MARK) + return error_mark_node; + + switch (code) + { + case PLUS_EXPR: + /* Handle the pointer + int case. */ + if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) + return pointer_int_sum (PLUS_EXPR, op0, op1); + else if (code1 == POINTER_TYPE && code0 == INTEGER_TYPE) + return pointer_int_sum (PLUS_EXPR, op1, op0); + else + common = 1; + break; + + case MINUS_EXPR: + /* Subtraction of two similar pointers. + We must subtract them as integers, then divide by object size. */ + if (code0 == POINTER_TYPE && code1 == POINTER_TYPE + && comp_target_types (type0, type1, 1)) + return pointer_diff (op0, op1); + /* Handle pointer minus int. Just like pointer plus int. */ + else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) + return pointer_int_sum (MINUS_EXPR, op0, op1); + else + common = 1; + break; + + case MULT_EXPR: + common = 1; + break; + + case TRUNC_DIV_EXPR: + case CEIL_DIV_EXPR: + case FLOOR_DIV_EXPR: + case ROUND_DIV_EXPR: + case EXACT_DIV_EXPR: + if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == REAL_TYPE)) + { + if (!(code0 == INTEGER_TYPE && code1 == INTEGER_TYPE)) + resultcode = RDIV_EXPR; + else + /* When dividing two signed integers, we have to promote to int. + unless we divide by a conatant != -1. Note that default + conversion will have been performed on the operands at this + point, so we have to dig out the original type to find out if + it was unsigned. */ + shorten = ((TREE_CODE (op0) == NOP_EXPR + && TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op0, 0)))) + || (TREE_CODE (op1) == INTEGER_CST + && (TREE_INT_CST_LOW (op1) != -1 + || TREE_INT_CST_HIGH (op1) != -1))); + common = 1; + } + break; + + case BIT_AND_EXPR: + case BIT_ANDTC_EXPR: + case BIT_IOR_EXPR: + case BIT_XOR_EXPR: + if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) + shorten = -1; + /* If one operand is a constant, and the other is a short type + that has been converted to an int, + really do the work in the short type and then convert the + result to int. If we are lucky, the constant will be 0 or 1 + in the short type, making the entire operation go away. */ + if (TREE_CODE (op0) == INTEGER_CST + && TREE_CODE (op1) == NOP_EXPR + && TYPE_PRECISION (type1) > TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op1, 0))) + && TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op1, 0)))) + { + final_type = result_type; + op1 = TREE_OPERAND (op1, 0); + result_type = TREE_TYPE (op1); + } + if (TREE_CODE (op1) == INTEGER_CST + && TREE_CODE (op0) == NOP_EXPR + && TYPE_PRECISION (type0) > TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op0, 0))) + && TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op0, 0)))) + { + final_type = result_type; + op0 = TREE_OPERAND (op0, 0); + result_type = TREE_TYPE (op0); + } + break; + + case TRUNC_MOD_EXPR: + case FLOOR_MOD_EXPR: + if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) + { + /* Although it would be tempting to shorten always here, that loses + on some targets, since the modulo instruction is undefined if the + quotient can't be represented in the computation mode. We shorten + only if unsigned or if dividing by something we know != -1. */ + shorten = ((TREE_CODE (op0) == NOP_EXPR + && TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op0, 0)))) + || (TREE_CODE (op1) == INTEGER_CST + && (TREE_INT_CST_LOW (op1) != -1 + || TREE_INT_CST_HIGH (op1) != -1))); + common = 1; + } + break; + + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: + case TRUTH_AND_EXPR: + case TRUTH_OR_EXPR: + if ((code0 == INTEGER_TYPE || code0 == POINTER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == POINTER_TYPE || code1 == REAL_TYPE)) + { + /* Result of these operations is always an int, + but that does not mean the operands should be + converted to ints! */ + result_type = integer_type_node; + op0 = truthvalue_conversion (op0); + op1 = truthvalue_conversion (op1); + converted = 1; + } + break; + + /* Shift operations: result has same type as first operand; + always convert second operand to int. + Also set SHORT_SHIFT if shifting rightward. */ + + case RSHIFT_EXPR: + if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) + { + result_type = type0; + if (TREE_CODE (op1) == INTEGER_CST) + { + if (tree_int_cst_lt (op1, integer_zero_node)) + warning ("right shift count is negative"); + else + { + if (TREE_INT_CST_LOW (op1) | TREE_INT_CST_HIGH (op1)) + short_shift = 1; + if (TREE_INT_CST_HIGH (op1) != 0 + || ((unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (op1) + >= TYPE_PRECISION (type0))) + warning ("right shift count >= width of type"); + } + } + /* Convert the shift-count to an integer, regardless of + size of value being shifted. */ + if (TYPE_MAIN_VARIANT (TREE_TYPE (op1)) != integer_type_node) + op1 = convert (integer_type_node, op1); + /* Avoid converting op1 to result_type later. */ + converted = 1; + } + break; + + case LSHIFT_EXPR: + if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) + { + result_type = type0; + if (TREE_CODE (op1) == INTEGER_CST) + { + if (tree_int_cst_lt (op1, integer_zero_node)) + warning ("left shift count is negative"); + else if (TREE_INT_CST_HIGH (op1) != 0 + || ((unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (op1) + >= TYPE_PRECISION (type0))) + warning ("left shift count >= width of type"); + } + /* Convert the shift-count to an integer, regardless of + size of value being shifted. */ + if (TYPE_MAIN_VARIANT (TREE_TYPE (op1)) != integer_type_node) + op1 = convert (integer_type_node, op1); + /* Avoid converting op1 to result_type later. */ + converted = 1; + } + break; + + case RROTATE_EXPR: + case LROTATE_EXPR: + if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE) + { + result_type = type0; + if (TREE_CODE (op1) == INTEGER_CST) + { + if (tree_int_cst_lt (op1, integer_zero_node)) + warning ("%s rotate count is negative", + (code == LROTATE_EXPR) ? "left" : "right"); + else if (TREE_INT_CST_HIGH (op1) != 0 + || ((unsigned HOST_WIDE_INT) TREE_INT_CST_LOW (op1) + >= TYPE_PRECISION (type0))) + warning ("%s rotate count >= width of type", + (code == LROTATE_EXPR) ? "left" : "right"); + } + /* Convert the shift-count to an integer, regardless of + size of value being shifted. */ + if (TYPE_MAIN_VARIANT (TREE_TYPE (op1)) != integer_type_node) + op1 = convert (integer_type_node, op1); + } + break; + + case EQ_EXPR: + case NE_EXPR: + /* Result of comparison is always int, + but don't convert the args to int! */ + result_type = integer_type_node; + converted = 1; + if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == REAL_TYPE)) + short_compare = 1; + else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE) + { + register tree tt0 = TYPE_MAIN_VARIANT (TREE_TYPE (type0)); + register tree tt1 = TYPE_MAIN_VARIANT (TREE_TYPE (type1)); + /* Anything compares with void *. void * compares with anything. + Otherwise, the targets must be the same. */ + if (tt0 != tt1 && TREE_CODE (tt0) == RECORD_TYPE + && TREE_CODE (tt1) == RECORD_TYPE) + { + tree base = common_base_type (tt0, tt1); + if (base == NULL_TREE) + warning ("comparison of distinct object pointer types"); + else if (base == error_mark_node) + { + message_2_types (error, "comparison of pointer types `%s*' and `%s*' requires conversion to ambiguous supertype", tt0, tt1); + return error_mark_node; + } + else + { + if (integer_zerop (op0)) + op0 = null_pointer_node; + else + op0 = convert_pointer_to (base, op0); + if (integer_zerop (op1)) + op1 = null_pointer_node; + else + op1 = convert_pointer_to (base, op1); + } + } + else if (comp_target_types (type0, type1, 1)) + ; + else if (tt0 == void_type_node) + { + if (pedantic && TREE_CODE (tt1) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids comparison of `void *' with function pointer"); + } + else if (tt1 == void_type_node) + { + if (pedantic && TREE_CODE (tt0) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids comparison of `void *' with function pointer"); + } + else if ((TYPE_SIZE (tt0) != 0) != (TYPE_SIZE (tt1) != 0)) + pedwarn ("comparison of complete and incomplete pointers"); + else + pedwarn ("comparison of distinct pointer types lacks a cast"); + } + else if (code0 == POINTER_TYPE && TREE_CODE (op1) == INTEGER_CST + && integer_zerop (op1)) + op1 = null_pointer_node; + else if (code1 == POINTER_TYPE && TREE_CODE (op0) == INTEGER_CST + && integer_zerop (op0)) + op0 = null_pointer_node; + else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) + { + error ("ANSI C++ forbids comparison between pointer and integer"); + op1 = convert (TREE_TYPE (op0), op1); + } + else if (code0 == INTEGER_TYPE && code1 == POINTER_TYPE) + { + error ("ANSI C++ forbids comparison between pointer and integer"); + op0 = convert (TREE_TYPE (op1), op0); + } + else if (TYPE_PTRMEMFUNC_P (type0) && TREE_CODE (op1) == INTEGER_CST + && integer_zerop (op1)) + { + op0 = build_component_ref (op0, index_identifier, 0, 0); + op1 = integer_zero_node; + } + else if (TYPE_PTRMEMFUNC_P (type1) && TREE_CODE (op0) == INTEGER_CST + && integer_zerop (op0)) + { + op0 = build_component_ref (op1, index_identifier, 0, 0); + op1 = integer_zero_node; + } + else if (TYPE_PTRMEMFUNC_P (type0) && TYPE_PTRMEMFUNC_P (type1) + && (TYPE_PTRMEMFUNC_FN_TYPE (type0) + == TYPE_PTRMEMFUNC_FN_TYPE (type1))) + { + /* The code we generate for the test is: + + (op0.index == op1.index + && ((op1.index != -1 && op0.delta2 == op1.delta2) + || op0.pfn == op1.pfn)) */ + + tree index0 = build_component_ref (op0, index_identifier, 0, 0); + tree index1 = save_expr (build_component_ref (op1, index_identifier, 0, 0)); + tree pfn0 = PFN_FROM_PTRMEMFUNC (op0); + tree pfn1 = PFN_FROM_PTRMEMFUNC (op1); + tree delta20 = DELTA2_FROM_PTRMEMFUNC (op0); + tree delta21 = DELTA2_FROM_PTRMEMFUNC (op1); + tree e1, e2, e3; + tree integer_neg_one_node + = size_binop (MINUS_EXPR, integer_zero_node, integer_one_node); + e1 = build_binary_op (EQ_EXPR, index0, index1, 1); + e2 = build_binary_op (NE_EXPR, index1, integer_neg_one_node, 1); + e2 = build_binary_op (TRUTH_ANDIF_EXPR, e2, build_binary_op (EQ_EXPR, delta20, delta21, 1), 1); + e3 = build_binary_op (EQ_EXPR, pfn0, pfn1, 1); + e2 = build_binary_op (TRUTH_ORIF_EXPR, e2, e3, 1); + e2 = build_binary_op (TRUTH_ANDIF_EXPR, e1, e2, 1); + if (code == EQ_EXPR) + return e2; + return build_binary_op (EQ_EXPR, e2, integer_zero_node, 1); + } + else if (TYPE_PTRMEMFUNC_P (type0) + && TYPE_PTRMEMFUNC_FN_TYPE (type0) == type1) + { + tree index0 = build_component_ref (op0, index_identifier, 0, 0); + tree index1; + tree pfn0 = PFN_FROM_PTRMEMFUNC (op0); + tree delta20 = DELTA2_FROM_PTRMEMFUNC (op0); + tree delta21 = integer_zero_node; + tree e1, e2, e3; + tree integer_neg_one_node + = size_binop (MINUS_EXPR, integer_zero_node, integer_one_node); + if (TREE_CODE (TREE_OPERAND (op1, 0)) == FUNCTION_DECL + && DECL_VINDEX (TREE_OPERAND (op1, 0))) + { + /* Map everything down one to make room for the null pointer to member. */ + index1 = size_binop (PLUS_EXPR, + DECL_VINDEX (TREE_OPERAND (op1, 0)), + integer_one_node); + op1 = integer_zero_node; + delta21 = CLASSTYPE_VFIELD (TYPE_METHOD_BASETYPE (TREE_TYPE (type1))); + delta21 = DECL_FIELD_BITPOS (delta21); + delta21 = size_binop (FLOOR_DIV_EXPR, delta21, size_int (BITS_PER_UNIT)); + } + else + index1 = integer_neg_one_node; + op1 = build1 (NOP_EXPR, TYPE_PTRMEMFUNC_FN_TYPE (type0), op1); + e1 = build_binary_op (EQ_EXPR, index0, index1, 1); + e2 = build_binary_op (NE_EXPR, index1, integer_neg_one_node, 1); + e2 = build_binary_op (TRUTH_ANDIF_EXPR, e2, build_binary_op (EQ_EXPR, delta20, delta21, 1), 1); + e3 = build_binary_op (EQ_EXPR, pfn0, op1, 1); + e2 = build_binary_op (TRUTH_ORIF_EXPR, e2, e3, 1); + e2 = build_binary_op (TRUTH_ANDIF_EXPR, e1, e2, 1); + if (code == EQ_EXPR) + return e2; + return build_binary_op (EQ_EXPR, e2, integer_zero_node, 1); + } + else if (TYPE_PTRMEMFUNC_P (type1) + && TYPE_PTRMEMFUNC_FN_TYPE (type1) == type0) + { + return build_binary_op (code, op1, op0, 1); + } + else + /* If args are not valid, clear out RESULT_TYPE + to cause an error message later. */ + result_type = 0; + break; + + case MAX_EXPR: + case MIN_EXPR: + if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == REAL_TYPE)) + shorten = 1; + else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE) + { + if (! comp_target_types (type0, type1, 1)) + pedwarn ("comparison of distinct pointer types lacks a cast"); + else if ((TYPE_SIZE (TREE_TYPE (type0)) != 0) + != (TYPE_SIZE (TREE_TYPE (type1)) != 0)) + pedwarn ("comparison of complete and incomplete pointers"); + else if (pedantic + && TREE_CODE (TREE_TYPE (type0)) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids ordered comparisons of pointers to functions"); + result_type = common_type (type0, type1); + } + break; + + case LE_EXPR: + case GE_EXPR: + case LT_EXPR: + case GT_EXPR: + if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == REAL_TYPE)) + short_compare = 1; + else if (code0 == POINTER_TYPE && code1 == POINTER_TYPE) + { + if (! comp_target_types (type0, type1, 1)) + pedwarn ("comparison of distinct pointer types lacks a cast"); + else if ((TYPE_SIZE (TREE_TYPE (type0)) != 0) + != (TYPE_SIZE (TREE_TYPE (type1)) != 0)) + pedwarn ("comparison of complete and incomplete pointers"); + else if (pedantic + && TREE_CODE (TREE_TYPE (type0)) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids ordered comparisons of pointers to functions"); + result_type = integer_type_node; + } + else if (code0 == POINTER_TYPE && TREE_CODE (op1) == INTEGER_CST + && integer_zerop (op1)) + { + result_type = integer_type_node; + op1 = null_pointer_node; + if (pedantic) + pedwarn ("ordered comparison of pointer with integer zero"); + } + else if (code1 == POINTER_TYPE && TREE_CODE (op0) == INTEGER_CST + && integer_zerop (op0)) + { + result_type = integer_type_node; + op0 = null_pointer_node; + if (pedantic) + pedwarn ("ANSI C++ forbids ordered comparison of pointer with integer zero"); + } + else if (code0 == POINTER_TYPE && code1 == INTEGER_TYPE) + { + result_type = integer_type_node; + if (pedantic) + pedwarn ("ANSI C++ forbids comparison between pointer and integer"); + else if (! flag_traditional) + warning ("comparison between pointer and integer"); + op1 = convert (TREE_TYPE (op0), op1); + } + else if (code0 == INTEGER_TYPE && code1 == POINTER_TYPE) + { + result_type = integer_type_node; + if (pedantic) + pedwarn ("ANSI C++ forbids comparison between pointer and integer"); + else if (! flag_traditional) + warning ("comparison between pointer and integer"); + op0 = convert (TREE_TYPE (op1), op0); + } + converted = 1; + break; + } + + if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE) + && (code1 == INTEGER_TYPE || code1 == REAL_TYPE)) + { + if (shorten || common || short_compare) + result_type = common_type (type0, type1); + + /* For certain operations (which identify themselves by shorten != 0) + if both args were extended from the same smaller type, + do the arithmetic in that type and then extend. + + shorten !=0 and !=1 indicates a bitwise operation. + For them, this optimization is safe only if + both args are zero-extended or both are sign-extended. + Otherwise, we might change the result. + Eg, (short)-1 | (unsigned short)-1 is (int)-1 + but calculated in (unsigned short) it would be (unsigned short)-1. */ + + if (shorten) + { + int unsigned0, unsigned1; + tree arg0 = get_narrower (op0, &unsigned0); + tree arg1 = get_narrower (op1, &unsigned1); + /* UNS is 1 if the operation to be done is an unsigned one. */ + int uns = TREE_UNSIGNED (result_type); + tree type; + + final_type = result_type; + + /* Handle the case that OP0 does not *contain* a conversion + but it *requires* conversion to FINAL_TYPE. */ + + if (op0 == arg0 && TREE_TYPE (op0) != final_type) + unsigned0 = TREE_UNSIGNED (TREE_TYPE (op0)); + if (op1 == arg1 && TREE_TYPE (op1) != final_type) + unsigned1 = TREE_UNSIGNED (TREE_TYPE (op1)); + + /* Now UNSIGNED0 is 1 if ARG0 zero-extends to FINAL_TYPE. */ + + /* For bitwise operations, signedness of nominal type + does not matter. Consider only how operands were extended. */ + if (shorten == -1) + uns = unsigned0; + + /* Note that in all three cases below we refrain from optimizing + an unsigned operation on sign-extended args. + That would not be valid. */ + + /* Both args variable: if both extended in same way + from same width, do it in that width. + Do it unsigned if args were zero-extended. */ + if ((TYPE_PRECISION (TREE_TYPE (arg0)) + < TYPE_PRECISION (result_type)) + && (TYPE_PRECISION (TREE_TYPE (arg1)) + == TYPE_PRECISION (TREE_TYPE (arg0))) + && unsigned0 == unsigned1 + && (unsigned0 || !uns)) + result_type + = signed_or_unsigned_type (unsigned0, + common_type (TREE_TYPE (arg0), TREE_TYPE (arg1))); + else if (TREE_CODE (arg0) == INTEGER_CST + && (unsigned1 || !uns) + && (TYPE_PRECISION (TREE_TYPE (arg1)) + < TYPE_PRECISION (result_type)) + && (type = signed_or_unsigned_type (unsigned1, + TREE_TYPE (arg1)), + int_fits_type_p (arg0, type))) + result_type = type; + else if (TREE_CODE (arg1) == INTEGER_CST + && (unsigned0 || !uns) + && (TYPE_PRECISION (TREE_TYPE (arg0)) + < TYPE_PRECISION (result_type)) + && (type = signed_or_unsigned_type (unsigned0, + TREE_TYPE (arg0)), + int_fits_type_p (arg1, type))) + result_type = type; + } + + /* Shifts can be shortened if shifting right. */ + + if (short_shift) + { + int unsigned_arg; + tree arg0 = get_narrower (op0, &unsigned_arg); + + final_type = result_type; + + if (arg0 == op0 && final_type == TREE_TYPE (op0)) + unsigned_arg = TREE_UNSIGNED (TREE_TYPE (op0)); + + if (TYPE_PRECISION (TREE_TYPE (arg0)) < TYPE_PRECISION (result_type) + /* If arg is sign-extended and then unsigned-shifted, + we can simulate this with a signed shift in arg's type + only if the extended result is at least twice as wide + as the arg. Otherwise, the shift could use up all the + ones made by sign-extension and bring in zeros. + We can't optimize that case at all, but in most machines + it never happens because available widths are 2**N. */ + && (!TREE_UNSIGNED (final_type) + || unsigned_arg + || ((unsigned) 2 * TYPE_PRECISION (TREE_TYPE (arg0)) + <= TYPE_PRECISION (result_type)))) + { + /* Do an unsigned shift if the operand was zero-extended. */ + result_type + = signed_or_unsigned_type (unsigned_arg, + TREE_TYPE (arg0)); + /* Convert value-to-be-shifted to that type. */ + if (TREE_TYPE (op0) != result_type) + op0 = convert (result_type, op0); + converted = 1; + } + } + + /* Comparison operations are shortened too but differently. + They identify themselves by setting short_compare = 1. */ + + if (short_compare) + { + /* Don't write &op0, etc., because that would prevent op0 + from being kept in a register. + Instead, make copies of the our local variables and + pass the copies by reference, then copy them back afterward. */ + tree xop0 = op0, xop1 = op1, xresult_type = result_type; + enum tree_code xresultcode = resultcode; + tree val + = shorten_compare (&xop0, &xop1, &xresult_type, &xresultcode); + if (val != 0) + return val; + op0 = xop0, op1 = xop1, result_type = xresult_type; + resultcode = xresultcode; + } + + if (short_compare && extra_warnings) + { + int unsignedp0, unsignedp1; + tree primop0 = get_narrower (op0, &unsignedp0); + tree primop1 = get_narrower (op1, &unsignedp1); + + /* Warn if signed and unsigned are being compared in a size larger + than their original size, as this will always fail. */ + + if (unsignedp0 != unsignedp1 + && (TYPE_PRECISION (TREE_TYPE (primop0)) + < TYPE_PRECISION (result_type)) + && (TYPE_PRECISION (TREE_TYPE (primop1)) + < TYPE_PRECISION (result_type))) + warning ("comparison between promoted unsigned and signed"); + + /* Warn if two unsigned values are being compared in a size + larger than their original size, and one (and only one) is the + result of a `~' operator. This comparison will always fail. + + Also warn if one operand is a constant, and the constant does not + have all bits set that are set in the ~ operand when it is + extended. */ + + else if (TREE_CODE (primop0) == BIT_NOT_EXPR + ^ TREE_CODE (primop1) == BIT_NOT_EXPR) + { + if (TREE_CODE (primop0) == BIT_NOT_EXPR) + primop0 = get_narrower (TREE_OPERAND (op0, 0), &unsignedp0); + if (TREE_CODE (primop1) == BIT_NOT_EXPR) + primop1 = get_narrower (TREE_OPERAND (op1, 0), &unsignedp1); + + if (TREE_CODE (primop0) == INTEGER_CST + || TREE_CODE (primop1) == INTEGER_CST) + { + tree primop; + HOST_WIDE_INT constant, mask; + int unsignedp; + unsigned bits; + + if (TREE_CODE (primop0) == INTEGER_CST) + { + primop = primop1; + unsignedp = unsignedp1; + constant = TREE_INT_CST_LOW (primop0); + } + else + { + primop = primop0; + unsignedp = unsignedp0; + constant = TREE_INT_CST_LOW (primop1); + } + + bits = TYPE_PRECISION (TREE_TYPE (primop)); + if (bits < TYPE_PRECISION (result_type) + && bits < HOST_BITS_PER_LONG && unsignedp) + { + mask = (~ (HOST_WIDE_INT) 0) << bits; + if ((mask & constant) != mask) + warning ("comparison of promoted ~unsigned with constant"); + } + } + else if (unsignedp0 && unsignedp1 + && (TYPE_PRECISION (TREE_TYPE (primop0)) + < TYPE_PRECISION (result_type)) + && (TYPE_PRECISION (TREE_TYPE (primop1)) + < TYPE_PRECISION (result_type))) + warning ("comparison of promoted ~unsigned with unsigned"); + } + } + } + + /* At this point, RESULT_TYPE must be nonzero to avoid an error message. + If CONVERTED is zero, both args will be converted to type RESULT_TYPE. + Then the expression will be built. + It will be given type FINAL_TYPE if that is nonzero; + otherwise, it will be given type RESULT_TYPE. */ + + if (!result_type) + { + binary_op_error (error_code); + return error_mark_node; + } + + if (! converted) + { + if (TREE_TYPE (op0) != result_type) + op0 = convert (result_type, op0); + if (TREE_TYPE (op1) != result_type) + op1 = convert (result_type, op1); + } + + { + register tree result = build (resultcode, result_type, op0, op1); + register tree folded; + + folded = fold (result); + if (folded == result) + TREE_CONSTANT (folded) = TREE_CONSTANT (op0) & TREE_CONSTANT (op1); + if (final_type != 0) + return convert (final_type, folded); + return folded; + } +} + +/* Return a tree for the sum or difference (RESULTCODE says which) + of pointer PTROP and integer INTOP. */ + +static tree +pointer_int_sum (resultcode, ptrop, intop) + enum tree_code resultcode; + register tree ptrop, intop; +{ + tree size_exp; + + register tree result; + register tree folded = fold (intop); + + /* The result is a pointer of the same type that is being added. */ + + register tree result_type = TREE_TYPE (ptrop); + + /* Needed to make OOPS V2R3 work. */ + intop = folded; + if (TREE_CODE (intop) == INTEGER_CST + && TREE_INT_CST_LOW (intop) == 0 + && TREE_INT_CST_HIGH (intop) == 0) + return ptrop; + + if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids using pointer of type `void *' in arithmetic"); + size_exp = integer_one_node; + } + else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids using pointer to a function in arithmetic"); + size_exp = integer_one_node; + } + else if (TREE_CODE (TREE_TYPE (result_type)) == METHOD_TYPE) + { + if (pedantic || warn_pointer_arith) + pedwarn ("ANSI C++ forbids using pointer to a method in arithmetic"); + size_exp = integer_one_node; + } + else if (TREE_CODE (TREE_TYPE (result_type)) == OFFSET_TYPE) + { + if (pedantic) + pedwarn ("ANSI C++ forbids using pointer to a member in arithmetic"); + size_exp = integer_one_node; + } + else + size_exp = size_in_bytes (TREE_TYPE (result_type)); + + /* If what we are about to multiply by the size of the elements + contains a constant term, apply distributive law + and multiply that constant term separately. + This helps produce common subexpressions. */ + + if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR) + && ! TREE_CONSTANT (intop) + && TREE_CONSTANT (TREE_OPERAND (intop, 1)) + && TREE_CONSTANT (size_exp)) + { + enum tree_code subcode = resultcode; + if (TREE_CODE (intop) == MINUS_EXPR) + subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR); + ptrop = build_binary_op (subcode, ptrop, TREE_OPERAND (intop, 1), 1); + intop = TREE_OPERAND (intop, 0); + } + + /* Convert the integer argument to a type the same size as a pointer + so the multiply won't overflow spuriously. */ + + if (TYPE_PRECISION (TREE_TYPE (intop)) != POINTER_SIZE) + intop = convert (type_for_size (POINTER_SIZE, 0), intop); + + /* Replace the integer argument + with a suitable product by the object size. */ + + intop = build_binary_op (MULT_EXPR, intop, size_exp, 1); + + /* Create the sum or difference. */ + + result = build (resultcode, result_type, ptrop, intop); + + folded = fold (result); + if (folded == result) + TREE_CONSTANT (folded) = TREE_CONSTANT (ptrop) & TREE_CONSTANT (intop); + return folded; +} + +/* Return a tree for the difference of pointers OP0 and OP1. + The resulting tree has type int. */ + +static tree +pointer_diff (op0, op1) + register tree op0, op1; +{ + register tree result, folded; + tree restype = ptrdiff_type_node; + tree target_type = TREE_TYPE (TREE_TYPE (op0)); + + if (pedantic) + { + if (TREE_CODE (target_type) == VOID_TYPE) + pedwarn ("ANSI C++ forbids using pointer of type `void *' in subtraction"); + if (TREE_CODE (target_type) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids using pointer to a function in subtraction"); + if (TREE_CODE (target_type) == METHOD_TYPE) + pedwarn ("ANSI C++ forbids using pointer to a method in subtraction"); + if (TREE_CODE (target_type) == OFFSET_TYPE) + pedwarn ("ANSI C++ forbids using pointer to a member in subtraction"); + } + + /* First do the subtraction as integers; + then drop through to build the divide operator. */ + + op0 = build_binary_op (MINUS_EXPR, + convert (restype, op0), convert (restype, op1), 1); + + /* This generates an error if op1 is a pointer to an incomplete type. */ + if (TYPE_SIZE (TREE_TYPE (TREE_TYPE (op1))) == 0) + error ("arithmetic on pointer to an incomplete type"); + + op1 = ((TREE_CODE (target_type) == VOID_TYPE + || TREE_CODE (target_type) == FUNCTION_TYPE + || TREE_CODE (target_type) == METHOD_TYPE + || TREE_CODE (target_type) == OFFSET_TYPE) + ? integer_one_node + : size_in_bytes (target_type)); + + /* Do the division. */ + + result = build (EXACT_DIV_EXPR, restype, op0, op1); + + folded = fold (result); + if (folded == result) + TREE_CONSTANT (folded) = TREE_CONSTANT (op0) & TREE_CONSTANT (op1); + return folded; +} + +/* Handle the case of taking the address of a COMPONENT_REF. + Called by `build_unary_op' and `build_up_reference'. + + ARG is the COMPONENT_REF whose address we want. + ARGTYPE is the pointer type that this address should have. + MSG is an error message to print if this COMPONENT_REF is not + addressable (such as a bitfield). */ + +tree +build_component_addr (arg, argtype, msg) + tree arg, argtype; + char *msg; +{ + tree field = TREE_OPERAND (arg, 1); + tree basetype = decl_type_context (field); + tree rval = build_unary_op (ADDR_EXPR, TREE_OPERAND (arg, 0), 0); + + if (DECL_BIT_FIELD (field)) + { + error (msg, IDENTIFIER_POINTER (DECL_NAME (field))); + return error_mark_node; + } + + if (flag_gc) + cp_warning ("address of `%T::%D' taken", basetype, field); + + if (TREE_CODE (field) == FIELD_DECL + && TYPE_USES_COMPLEX_INHERITANCE (basetype)) + /* Can't convert directly to ARGTYPE, since that + may have the same pointer type as one of our + baseclasses. */ + rval = build1 (NOP_EXPR, argtype, + convert_pointer_to (basetype, rval)); + else + /* This conversion is harmless. */ + rval = convert (argtype, rval); + + if (! integer_zerop (DECL_FIELD_BITPOS (field))) + { + tree offset = size_binop (EASY_DIV_EXPR, DECL_FIELD_BITPOS (field), + size_int (BITS_PER_UNIT)); + int flag = TREE_CONSTANT (rval); + rval = fold (build (PLUS_EXPR, argtype, + rval, convert (argtype, offset))); + TREE_CONSTANT (rval) = flag; + } + return rval; +} + +/* Construct and perhaps optimize a tree representation + for a unary operation. CODE, a tree_code, specifies the operation + and XARG is the operand. */ + +tree +build_x_unary_op (code, xarg) + enum tree_code code; + tree xarg; +{ + /* & rec, on incomplete RECORD_TYPEs is the simple opr &, not an + error message. */ + if (code != ADDR_EXPR || TREE_CODE (TREE_TYPE (xarg)) != RECORD_TYPE + || TYPE_SIZE (TREE_TYPE (xarg))) + { + tree rval = build_opfncall (code, LOOKUP_SPECULATIVELY, xarg, + NULL_TREE, NULL_TREE); + if (rval) + return build_opfncall (code, LOOKUP_NORMAL, xarg, + NULL_TREE, NULL_TREE); + } + return build_unary_op (code, xarg, 0); +} + +/* C++: Must handle pointers to members. + + Perhaps type instantiation should be extended to handle conversion + from aggregates to types we don't yet know we want? (Or are those + cases typically errors which should be reported?) + + NOCONVERT nonzero suppresses the default promotions + (such as from short to int). */ +tree +build_unary_op (code, xarg, noconvert) + enum tree_code code; + tree xarg; + int noconvert; +{ + /* No default_conversion here. It causes trouble for ADDR_EXPR. */ + register tree arg = xarg; + register tree argtype = 0; + register enum tree_code typecode = TREE_CODE (TREE_TYPE (arg)); + char *errstring = NULL; + tree val; + int isaggrtype; + + if (typecode == ERROR_MARK) + return error_mark_node; + + if (typecode == REFERENCE_TYPE && code != ADDR_EXPR && ! noconvert) + { + arg = convert_from_reference (arg); + typecode = TREE_CODE (TREE_TYPE (arg)); + } + + if (typecode == ENUMERAL_TYPE) + typecode = INTEGER_TYPE; + + isaggrtype = IS_AGGR_TYPE_CODE (typecode); + + switch (code) + { + case CONVERT_EXPR: + /* This is used for unary plus, because a CONVERT_EXPR + is enough to prevent anybody from looking inside for + associativity, but won't generate any code. */ + if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE)) + errstring = "wrong type argument to unary plus"; + else if (!noconvert) + arg = default_conversion (arg); + break; + + case NEGATE_EXPR: + if (isaggrtype) + { + if (!noconvert) + arg = default_conversion (arg); + else + { + cp_error ("type conversion for type `%T' not allowed", + TREE_TYPE (arg)); + return error_mark_node; + } + typecode = TREE_CODE (TREE_TYPE (arg)); + noconvert = 1; + } + + if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE)) + errstring = "wrong type argument to unary minus"; + else if (!noconvert) + arg = default_conversion (arg); + break; + + case BIT_NOT_EXPR: + if (isaggrtype) + { + if (!noconvert) + arg = default_conversion (arg); + else + { + cp_error ("type conversion for type `%T' not allowed", + TREE_TYPE (arg)); + return error_mark_node; + } + typecode = TREE_CODE (TREE_TYPE (arg)); + noconvert = 1; + } + + if (typecode != INTEGER_TYPE) + errstring = "wrong type argument to bit-complement"; + else if (!noconvert) + arg = default_conversion (arg); + break; + + case ABS_EXPR: + if (isaggrtype) + { + if (!noconvert) + arg = default_conversion (arg); + else + { + cp_error ("type conversion for type `%T' not allowed", + TREE_TYPE (arg)); + return error_mark_node; + } + typecode = TREE_CODE (TREE_TYPE (arg)); + noconvert = 1; + } + + if (!(typecode == INTEGER_TYPE || typecode == REAL_TYPE)) + errstring = "wrong type argument to abs"; + else if (!noconvert) + arg = default_conversion (arg); + break; + + case TRUTH_NOT_EXPR: + if (isaggrtype) + { + arg = truthvalue_conversion (arg); + typecode = TREE_CODE (TREE_TYPE (arg)); + } + + if (typecode != INTEGER_TYPE + && typecode != REAL_TYPE && typecode != POINTER_TYPE + /* These will convert to a pointer. */ + && typecode != ARRAY_TYPE && typecode != FUNCTION_TYPE) + { + errstring = "wrong type argument to unary exclamation mark"; + break; + } + arg = truthvalue_conversion (arg); + val = invert_truthvalue (arg); + if (val) return val; + break; + + case NOP_EXPR: + break; + + case PREINCREMENT_EXPR: + case POSTINCREMENT_EXPR: + case PREDECREMENT_EXPR: + case POSTDECREMENT_EXPR: + /* Handle complex lvalues (when permitted) + by reduction to simpler cases. */ + + val = unary_complex_lvalue (code, arg); + if (val != 0) + return val; + + /* Report invalid types. */ + + if (isaggrtype) + { + arg = default_conversion (arg); + typecode = TREE_CODE (TREE_TYPE (arg)); + } + + if (typecode != POINTER_TYPE + && typecode != INTEGER_TYPE && typecode != REAL_TYPE) + { + if (code == PREINCREMENT_EXPR) + errstring ="no pre-increment operator for type"; + else if (code == POSTINCREMENT_EXPR) + errstring ="no post-increment operator for type"; + else if (code == PREDECREMENT_EXPR) + errstring ="no pre-decrement operator for type"; + else + errstring ="no post-decrement operator for type"; + break; + } + + /* Report something read-only. */ + + if (TYPE_READONLY (TREE_TYPE (arg)) + || TREE_READONLY (arg)) + readonly_error (arg, ((code == PREINCREMENT_EXPR + || code == POSTINCREMENT_EXPR) + ? "increment" : "decrement"), + 0); + + { + register tree inc; + tree result_type = TREE_TYPE (arg); + + arg = get_unwidened (arg, 0); + argtype = TREE_TYPE (arg); + + /* ARM $5.2.5 last annotation says this should be forbidden. */ + if (TREE_CODE (argtype) == ENUMERAL_TYPE) + pedwarn ("ANSI C++ forbids %sing an enum", + (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR) + ? "increment" : "decrement"); + + /* Compute the increment. */ + + if (typecode == POINTER_TYPE) + { + enum tree_code tmp = TREE_CODE (TREE_TYPE (argtype)); + if (tmp == FUNCTION_TYPE || tmp == METHOD_TYPE + || tmp == VOID_TYPE || tmp == OFFSET_TYPE) + cp_pedwarn ("ANSI C++ forbids %sing a pointer of type `%T'", + ((code == PREINCREMENT_EXPR + || code == POSTINCREMENT_EXPR) + ? "increment" : "decrement"), argtype); + inc = c_sizeof_nowarn (TREE_TYPE (argtype)); + } + else + inc = integer_one_node; + + inc = convert (argtype, inc); + + /* Handle incrementing a cast-expression. */ + + switch (TREE_CODE (arg)) + { + case NOP_EXPR: + case CONVERT_EXPR: + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + case FIX_FLOOR_EXPR: + case FIX_ROUND_EXPR: + case FIX_CEIL_EXPR: + { + tree incremented, modify, value; + pedantic_lvalue_warning (CONVERT_EXPR); + arg = stabilize_reference (arg); + if (code == PREINCREMENT_EXPR || code == PREDECREMENT_EXPR) + value = arg; + else + value = save_expr (arg); + incremented = build (((code == PREINCREMENT_EXPR + || code == POSTINCREMENT_EXPR) + ? PLUS_EXPR : MINUS_EXPR), + argtype, value, inc); + TREE_SIDE_EFFECTS (incremented) = 1; + modify = build_modify_expr (arg, NOP_EXPR, incremented); + return build (COMPOUND_EXPR, TREE_TYPE (arg), modify, value); + } + } + + if (TREE_CODE (arg) == OFFSET_REF) + arg = resolve_offset_ref (arg); + + /* Complain about anything else that is not a true lvalue. */ + if (!lvalue_or_else (arg, ((code == PREINCREMENT_EXPR + || code == POSTINCREMENT_EXPR) + ? "increment" : "decrement"))) + return error_mark_node; + + val = build (code, TREE_TYPE (arg), arg, inc); + TREE_SIDE_EFFECTS (val) = 1; + return convert (result_type, val); + } + + case ADDR_EXPR: + /* Note that this operation never does default_conversion + regardless of NOCONVERT. */ + + if (TREE_REFERENCE_EXPR (arg)) + { + error ("references are not lvalues"); + return error_mark_node; + } + else if (typecode == REFERENCE_TYPE) + { + arg = build1 (CONVERT_EXPR, build_pointer_type (TREE_TYPE (TREE_TYPE (arg))), arg); + TREE_REFERENCE_EXPR (arg) = 1; + return arg; + } + else if (TREE_CODE (arg) == FUNCTION_DECL + && DECL_NAME (arg) + && DECL_CONTEXT (arg) == NULL_TREE + && IDENTIFIER_LENGTH (DECL_NAME (arg)) == 4 + && IDENTIFIER_POINTER (DECL_NAME (arg))[0] == 'm' + && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (arg)), "main")) + { + /* ARM $3.4 */ + error ("attempt to take address of function `main'"); + return error_mark_node; + } + + /* Let &* cancel out to simplify resulting code. */ + if (TREE_CODE (arg) == INDIRECT_REF) + { + /* We don't need to have `current_class_decl' wrapped in a + NON_LVALUE_EXPR node. */ + if (arg == C_C_D) + return current_class_decl; + + /* Keep `default_conversion' from converting if + ARG is of REFERENCE_TYPE. */ + arg = TREE_OPERAND (arg, 0); + if (TREE_CODE (TREE_TYPE (arg)) == REFERENCE_TYPE) + { + if (TREE_CODE (arg) == VAR_DECL && DECL_INITIAL (arg) + && !TREE_SIDE_EFFECTS (DECL_INITIAL (arg))) + arg = DECL_INITIAL (arg); + arg = build1 (CONVERT_EXPR, build_pointer_type (TREE_TYPE (TREE_TYPE (arg))), arg); + TREE_REFERENCE_EXPR (arg) = 1; + TREE_CONSTANT (arg) = TREE_CONSTANT (TREE_OPERAND (arg, 0)); + } + else if (lvalue_p (arg)) + /* Don't let this be an lvalue. */ + return non_lvalue (arg); + return arg; + } + + /* For &x[y], return x+y */ + if (TREE_CODE (arg) == ARRAY_REF) + { + if (mark_addressable (TREE_OPERAND (arg, 0)) == 0) + return error_mark_node; + return build_binary_op (PLUS_EXPR, TREE_OPERAND (arg, 0), + TREE_OPERAND (arg, 1), 1); + } + + /* For &(++foo), we are really taking the address of the variable + being acted upon by the increment/decrement operator. ARM $5.3.1 + However, according to ARM $5.2.5, we don't allow postfix ++ and + --, since the prefix operators return lvalues, but the postfix + operators do not. */ + if (TREE_CODE (arg) == PREINCREMENT_EXPR + || TREE_CODE (arg) == PREDECREMENT_EXPR) + arg = TREE_OPERAND (arg, 0); + + /* Uninstantiated types are all functions. Taking the + address of a function is a no-op, so just return the + argument. */ + + if (TREE_CODE (arg) == IDENTIFIER_NODE + && IDENTIFIER_OPNAME_P (arg)) + { + my_friendly_abort (117); + /* We don't know the type yet, so just work around the problem. + We know that this will resolve to an lvalue. */ + return build1 (ADDR_EXPR, unknown_type_node, arg); + } + + if (TREE_CODE (arg) == TREE_LIST) + { + /* Look at methods with only this name. */ + if (TREE_CODE (TREE_VALUE (arg)) == FUNCTION_DECL) + { + tree targ = TREE_VALUE (arg); + + /* If this function is unique, or it is a unique + constructor, we can take its address easily. */ + if (DECL_CHAIN (targ) == NULL_TREE + || (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (targ)) + && DECL_CHAIN (DECL_CHAIN (targ)) == NULL_TREE)) + { + if (DECL_CHAIN (targ)) + targ = DECL_CHAIN (targ); + if (DECL_CLASS_CONTEXT (targ)) + targ = build (OFFSET_REF, TREE_TYPE (targ), C_C_D, targ); + + val = unary_complex_lvalue (ADDR_EXPR, targ); + if (val) + return val; + } + + /* This possible setting of TREE_CONSTANT is what makes it possible + with an initializer list to emit the entire thing in the data + section, rather than a run-time initialization. */ + arg = build1 (ADDR_EXPR, unknown_type_node, arg); + if (staticp (targ)) + TREE_CONSTANT (arg) = 1; + return arg; + } + if (TREE_CHAIN (arg) == NULL_TREE + && TREE_CODE (TREE_VALUE (arg)) == TREE_LIST + && DECL_CHAIN (TREE_VALUE (TREE_VALUE (arg))) == NULL_TREE) + { + /* Unique overloaded member function. */ + return build_unary_op (ADDR_EXPR, TREE_VALUE (TREE_VALUE (arg)), 0); + } + return build1 (ADDR_EXPR, unknown_type_node, arg); + } + + /* Handle complex lvalues (when permitted) + by reduction to simpler cases. */ + val = unary_complex_lvalue (code, arg); + if (val != 0) + return val; + +#if 0 /* Turned off because inconsistent; + float f; *&(int)f = 3.4 stores in int format + whereas (int)f = 3.4 stores in float format. */ + /* Address of a cast is just a cast of the address + of the operand of the cast. */ + switch (TREE_CODE (arg)) + { + case NOP_EXPR: + case CONVERT_EXPR: + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + case FIX_FLOOR_EXPR: + case FIX_ROUND_EXPR: + case FIX_CEIL_EXPR: + if (pedantic) + pedwarn ("ANSI C++ forbids taking the address of a cast expression"); + return convert (build_pointer_type (TREE_TYPE (arg)), + build_unary_op (ADDR_EXPR, TREE_OPERAND (arg, 0), 0)); + } +#endif + + /* Allow the address of a constructor if all the elements + are constant. */ + if (TREE_CODE (arg) == CONSTRUCTOR && TREE_CONSTANT (arg)) + ; + /* Anything not already handled and not a true memory reference + is an error. */ + else if (typecode != FUNCTION_TYPE + && typecode != METHOD_TYPE + && !lvalue_or_else (arg, "unary `&'")) + return error_mark_node; + + /* Ordinary case; arg is a COMPONENT_REF or a decl. */ + argtype = TREE_TYPE (arg); + /* If the lvalue is const or volatile, + merge that into the type that the address will point to. */ + if (TREE_CODE_CLASS (TREE_CODE (arg)) == 'd' + || TREE_CODE_CLASS (TREE_CODE (arg)) == 'r') + { + if (TREE_READONLY (arg) || TREE_THIS_VOLATILE (arg)) + argtype = build_type_variant (argtype, + TREE_READONLY (arg), + TREE_THIS_VOLATILE (arg)); + } + + argtype = build_pointer_type (argtype); + + if (mark_addressable (arg) == 0) + return error_mark_node; + + { + tree addr; + + if (TREE_CODE (arg) == COMPONENT_REF) + addr = build_component_addr (arg, argtype, + "attempt to take address of bit-field structure member `%s'"); + else + addr = build1 (code, argtype, arg); + + /* Address of a static or external variable or + function counts as a constant */ + if (staticp (arg)) + TREE_CONSTANT (addr) = 1; + return addr; + } + } + + if (!errstring) + { + if (argtype == 0) + argtype = TREE_TYPE (arg); + return fold (build1 (code, argtype, arg)); + } + + error (errstring); + return error_mark_node; +} + +/* If CONVERSIONS is a conversion expression or a nested sequence of such, + convert ARG with the same conversions in the same order + and return the result. */ + +static tree +convert_sequence (conversions, arg) + tree conversions; + tree arg; +{ + switch (TREE_CODE (conversions)) + { + case NOP_EXPR: + case CONVERT_EXPR: + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + case FIX_FLOOR_EXPR: + case FIX_ROUND_EXPR: + case FIX_CEIL_EXPR: + return convert (TREE_TYPE (conversions), + convert_sequence (TREE_OPERAND (conversions, 0), + arg)); + + default: + return arg; + } +} + +/* Apply unary lvalue-demanding operator CODE to the expression ARG + for certain kinds of expressions which are not really lvalues + but which we can accept as lvalues. + + If ARG is not a kind of expression we can handle, return zero. */ + +tree +unary_complex_lvalue (code, arg) + enum tree_code code; + tree arg; +{ + /* Handle (a, b) used as an "lvalue". */ + if (TREE_CODE (arg) == COMPOUND_EXPR) + { + tree real_result = build_unary_op (code, TREE_OPERAND (arg, 1), 0); + pedantic_lvalue_warning (COMPOUND_EXPR); + return build (COMPOUND_EXPR, TREE_TYPE (real_result), + TREE_OPERAND (arg, 0), real_result); + } + + /* Handle (a ? b : c) used as an "lvalue". */ + if (TREE_CODE (arg) == COND_EXPR) + { + pedantic_lvalue_warning (COND_EXPR); + return rationalize_conditional_expr (code, arg); + } + + if (code != ADDR_EXPR) + return 0; + + /* Handle (a = b) used as an "lvalue" for `&'. */ + if (TREE_CODE (arg) == MODIFY_EXPR + || TREE_CODE (arg) == INIT_EXPR) + { + tree real_result = build_unary_op (code, TREE_OPERAND (arg, 0), 0); + return build (COMPOUND_EXPR, TREE_TYPE (real_result), arg, real_result); + } + + if (TREE_CODE (arg) == WITH_CLEANUP_EXPR) + { + tree real_result = build_unary_op (code, TREE_OPERAND (arg, 0), 0); + real_result = build (WITH_CLEANUP_EXPR, TREE_TYPE (real_result), + real_result, 0, TREE_OPERAND (arg, 2)); + return real_result; + } + + if (TREE_CODE (TREE_TYPE (arg)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (arg)) == METHOD_TYPE + || TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE) + { + /* The representation of something of type OFFSET_TYPE + is really the representation of a pointer to it. + Here give the representation its true type. */ + tree t; + tree offset; + + my_friendly_assert (TREE_CODE (arg) != SCOPE_REF, 313); + + if (TREE_CODE (arg) != OFFSET_REF) + return 0; + + t = TREE_OPERAND (arg, 1); + + if (TREE_CODE (t) == FUNCTION_DECL) /* Check all this code for right semantics. */ + return build_unary_op (ADDR_EXPR, t, 0); + if (TREE_CODE (t) == VAR_DECL) + return build_unary_op (ADDR_EXPR, t, 0); + else + { + /* Can't build a pointer to member if the member must + go through virtual base classes. */ + if (virtual_member (DECL_FIELD_CONTEXT (t), + CLASSTYPE_VBASECLASSES (TREE_TYPE (TREE_OPERAND (arg, 0))))) + { + sorry ("pointer to member via virtual baseclass"); + return error_mark_node; + } + + if (TREE_OPERAND (arg, 0) + && (TREE_CODE (TREE_OPERAND (arg, 0)) != NOP_EXPR + || TREE_OPERAND (TREE_OPERAND (arg, 0), 0) != error_mark_node)) + { + /* Don't know if this should return address to just + _DECL, or actual address resolved in this expression. */ + sorry ("address of bound pointer-to-member expression"); + return error_mark_node; + } + + return convert (build_pointer_type (TREE_TYPE (arg)), + size_binop (EASY_DIV_EXPR, + DECL_FIELD_BITPOS (t), + size_int (BITS_PER_UNIT))); + } + } + + if (TREE_CODE (arg) == OFFSET_REF) + { + tree left = TREE_OPERAND (arg, 0), left_addr; + tree right_addr = build_unary_op (ADDR_EXPR, TREE_OPERAND (arg, 1), 0); + + if (left == 0) + if (current_class_decl) + left_addr = current_class_decl; + else + { + error ("no `this' for pointer to member"); + return error_mark_node; + } + else + left_addr = build_unary_op (ADDR_EXPR, left, 0); + + return build (PLUS_EXPR, build_pointer_type (TREE_TYPE (arg)), + build1 (NOP_EXPR, integer_type_node, left_addr), + build1 (NOP_EXPR, integer_type_node, right_addr)); + } + + /* We permit compiler to make function calls returning + objects of aggregate type look like lvalues. */ + { + tree targ = arg; + + if (TREE_CODE (targ) == SAVE_EXPR) + targ = TREE_OPERAND (targ, 0); + + if (TREE_CODE (targ) == CALL_EXPR && IS_AGGR_TYPE (TREE_TYPE (targ))) + { + if (TREE_CODE (arg) == SAVE_EXPR) + targ = arg; + else + targ = build_cplus_new (TREE_TYPE (arg), arg, 1); + return build1 (ADDR_EXPR, TYPE_POINTER_TO (TREE_TYPE (arg)), targ); + } + + if (TREE_CODE (arg) == SAVE_EXPR && TREE_CODE (targ) == INDIRECT_REF) + return build (SAVE_EXPR, TYPE_POINTER_TO (TREE_TYPE (arg)), + TREE_OPERAND (targ, 0), current_function_decl, NULL); + + /* We shouldn't wrap WITH_CLEANUP_EXPRs inside of SAVE_EXPRs, but in case + we do, here's how to handle it. */ + if (TREE_CODE (arg) == SAVE_EXPR && TREE_CODE (targ) == WITH_CLEANUP_EXPR) + { +#if 0 + /* Not really a bug, but something to turn on when testing. */ + compiler_error ("WITH_CLEANUP_EXPR wrapped in SAVE_EXPR"); +#endif + return unary_complex_lvalue (ADDR_EXPR, targ); + } + } + + /* Don't let anything else be handled specially. */ + return 0; +} + +/* If pedantic, warn about improper lvalue. CODE is either COND_EXPR + COMPOUND_EXPR, or CONVERT_EXPR (for casts). */ + +static void +pedantic_lvalue_warning (code) + enum tree_code code; +{ + if (pedantic) + pedwarn ("ANSI C++ forbids use of %s expressions as lvalues", + code == COND_EXPR ? "conditional" + : code == COMPOUND_EXPR ? "compound" : "cast"); +} + +/* Mark EXP saying that we need to be able to take the + address of it; it should not be allocated in a register. + Value is 1 if successful. + + C++: we do not allow `current_class_decl' to be addressable. */ + +int +mark_addressable (exp) + tree exp; +{ + register tree x = exp; + + if (TREE_ADDRESSABLE (x) == 1) + return 1; + + while (1) + switch (TREE_CODE (x)) + { + case ADDR_EXPR: + case COMPONENT_REF: + case ARRAY_REF: + x = TREE_OPERAND (x, 0); + break; + + case PARM_DECL: + if (x == current_class_decl) + { + error ("address of `this' not available"); + TREE_ADDRESSABLE (x) = 1; /* so compiler doesn't die later */ + put_var_into_stack (x); + return 1; + } + case VAR_DECL: + if (TREE_STATIC (x) + && TREE_READONLY (x) + && DECL_RTL (x) != 0 + && ! decl_in_memory_p (x)) + { + /* We thought this would make a good constant variable, + but we were wrong. */ + push_obstacks_nochange (); + end_temporary_allocation (); + + TREE_ASM_WRITTEN (x) = 0; + DECL_RTL (x) = 0; + rest_of_decl_compilation (x, 0, IDENTIFIER_LOCAL_VALUE (x) == 0, 0); + TREE_ADDRESSABLE (x) = 1; + + pop_obstacks (); + + return 1; + } + /* Caller should not be trying to mark initialized + constant fields addressable. */ + my_friendly_assert (DECL_LANG_SPECIFIC (x) == 0 + || DECL_IN_AGGR_P (x) == 0 + || TREE_STATIC (x) + || DECL_EXTERNAL (x), 314); + + case CONST_DECL: + case RESULT_DECL: + /* For C++, we don't warn about taking the address of a register + variable for CONST_DECLs; ARM p97 explicitly says it's okay. */ + put_var_into_stack (x); + TREE_ADDRESSABLE (x) = 1; + return 1; + + case FUNCTION_DECL: + /* We have to test both conditions here. The first may + be non-zero in the case of processing a default function. + The second may be non-zero in the case of a template function. */ + x = DECL_MAIN_VARIANT (x); + if ((DECL_INLINE (x) || DECL_PENDING_INLINE_INFO (x)) + && (DECL_CONTEXT (x) == NULL_TREE + || TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (x))) != 't' + || ! CLASSTYPE_INTERFACE_ONLY (DECL_CONTEXT (x)))) + { + mark_inline_for_output (x); + if (x == current_function_decl) + DECL_EXTERNAL (x) = 0; + } + TREE_ADDRESSABLE (x) = 1; + TREE_USED (x) = 1; + TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (x)) = 1; + return 1; + + default: + return 1; + } +} + +/* Build and return a conditional expression IFEXP ? OP1 : OP2. */ + +tree +build_x_conditional_expr (ifexp, op1, op2) + tree ifexp, op1, op2; +{ + tree rval = NULL_TREE; + + /* See comments in `build_x_binary_op'. */ + if (op1 != 0) + rval = build_opfncall (COND_EXPR, LOOKUP_SPECULATIVELY, ifexp, op1, op2); + if (rval) + return build_opfncall (COND_EXPR, LOOKUP_NORMAL, ifexp, op1, op2); + + return build_conditional_expr (ifexp, op1, op2); +} + +tree +build_conditional_expr (ifexp, op1, op2) + tree ifexp, op1, op2; +{ + register tree type1; + register tree type2; + register enum tree_code code1; + register enum tree_code code2; + register tree result_type = NULL_TREE; + tree orig_op1 = op1, orig_op2 = op2; + + /* If second operand is omitted, it is the same as the first one; + make sure it is calculated only once. */ + if (op1 == 0) + { + if (pedantic) + pedwarn ("ANSI C++ forbids omitting the middle term of a ?: expression"); + ifexp = op1 = save_expr (ifexp); + } + + ifexp = truthvalue_conversion (default_conversion (ifexp)); + + if (TREE_CODE (ifexp) == ERROR_MARK) + return error_mark_node; + + op1 = require_instantiated_type (TREE_TYPE (op2), op1, error_mark_node); + if (op1 == error_mark_node) + return error_mark_node; + op2 = require_instantiated_type (TREE_TYPE (op1), op2, error_mark_node); + if (op2 == error_mark_node) + return error_mark_node; + + /* C++: REFERENCE_TYPES must be dereferenced. */ + type1 = TREE_TYPE (op1); + code1 = TREE_CODE (type1); + type2 = TREE_TYPE (op2); + code2 = TREE_CODE (type2); + + if (code1 == REFERENCE_TYPE) + { + op1 = convert_from_reference (op1); + type1 = TREE_TYPE (op1); + code1 = TREE_CODE (type1); + } + if (code2 == REFERENCE_TYPE) + { + op2 = convert_from_reference (op2); + type2 = TREE_TYPE (op2); + code2 = TREE_CODE (type2); + } + +#if 1 /* Produces wrong result if within sizeof. Sorry. */ + /* Don't promote the operands separately if they promote + the same way. Return the unpromoted type and let the combined + value get promoted if necessary. */ + + if (TYPE_MAIN_VARIANT (type1) == TYPE_MAIN_VARIANT (type2) + && code2 != ARRAY_TYPE +#if 0 + /* For C++, let the enumeral type come through. */ + && code2 != ENUMERAL_TYPE +#endif + && code2 != FUNCTION_TYPE + && code2 != METHOD_TYPE) + { + tree result; + + if (TREE_CONSTANT (ifexp) + && (TREE_CODE (ifexp) == INTEGER_CST + || TREE_CODE (ifexp) == ADDR_EXPR)) + return (integer_zerop (ifexp) ? op2 : op1); + + if (TREE_CODE (op1) == CONST_DECL) + op1 = DECL_INITIAL (op1); + else if (TREE_READONLY_DECL_P (op1)) + op1 = decl_constant_value (op1); + if (TREE_CODE (op2) == CONST_DECL) + op2 = DECL_INITIAL (op2); + else if (TREE_READONLY_DECL_P (op2)) + op2 = decl_constant_value (op2); + if (type1 != type2) + type1 = build_type_variant + (type1, + TREE_READONLY (op1) || TREE_READONLY (op2), + TREE_THIS_VOLATILE (op1) || TREE_THIS_VOLATILE (op2)); + /* ??? This is a kludge to deal with the fact that + we don't sort out integers and enums properly, yet. */ + result = fold (build (COND_EXPR, type1, ifexp, op1, op2)); + if (TREE_TYPE (result) != type1) + result = build1 (NOP_EXPR, type1, result); + return result; + } +#endif + + /* They don't match; promote them both and then try to reconcile them. + But don't permit mismatching enum types. */ + if (code1 == ENUMERAL_TYPE) + { + if (code2 == ENUMERAL_TYPE) + { + message_2_types (error, "enumeral mismatch in conditional expression: `%s' vs `%s'", type1, type2); + return error_mark_node; + } + else if (extra_warnings && ! IS_AGGR_TYPE_CODE (code2)) + warning ("enumeral and non-enumeral type in conditional expression"); + } + else if (extra_warnings + && code2 == ENUMERAL_TYPE && ! IS_AGGR_TYPE_CODE (code1)) + warning ("enumeral and non-enumeral type in conditional expression"); + + if (code1 != VOID_TYPE) + { + op1 = default_conversion (op1); + type1 = TREE_TYPE (op1); + code1 = TREE_CODE (type1); + } + if (code2 != VOID_TYPE) + { + op2 = default_conversion (op2); + type2 = TREE_TYPE (op2); + code2 = TREE_CODE (type2); + } + + /* Quickly detect the usual case where op1 and op2 have the same type + after promotion. */ + if (TYPE_MAIN_VARIANT (type1) == TYPE_MAIN_VARIANT (type2)) + { + if (type1 == type2) + result_type = type1; + else + result_type = build_type_variant + (type1, + TREE_READONLY (op1) || TREE_READONLY (op2), + TREE_THIS_VOLATILE (op1) || TREE_THIS_VOLATILE (op2)); + } + else if ((code1 == INTEGER_TYPE || code1 == REAL_TYPE) + && (code2 == INTEGER_TYPE || code2 == REAL_TYPE)) + { + result_type = common_type (type1, type2); + } + else if (code1 == VOID_TYPE || code2 == VOID_TYPE) + { + if (pedantic && (code1 != VOID_TYPE || code2 != VOID_TYPE)) + pedwarn ("ANSI C++ forbids conditional expr with only one void side"); + result_type = void_type_node; + } + else if (code1 == POINTER_TYPE && code2 == POINTER_TYPE) + { + if (comp_target_types (type1, type2, 1)) + result_type = common_type (type1, type2); + else if (integer_zerop (op1) && TREE_TYPE (type1) == void_type_node + && TREE_CODE (orig_op1) != NOP_EXPR) + result_type = qualify_type (type2, type1); + else if (integer_zerop (op2) && TREE_TYPE (type2) == void_type_node + && TREE_CODE (orig_op2) != NOP_EXPR) + result_type = qualify_type (type1, type2); + else if (TYPE_MAIN_VARIANT (TREE_TYPE (type1)) == void_type_node) + { + if (pedantic && TREE_CODE (type2) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids conditional expr between `void *' and function pointer"); + result_type = qualify_type (type1, type2); + } + else if (TYPE_MAIN_VARIANT (TREE_TYPE (type2)) == void_type_node) + { + if (pedantic && TREE_CODE (type1) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids conditional expr between `void *' and function pointer"); + result_type = qualify_type (type2, type1); + } + /* C++ */ + else if (comptypes (type2, type1, 0)) + result_type = type2; + else if (IS_AGGR_TYPE (TREE_TYPE (type1)) + && IS_AGGR_TYPE (TREE_TYPE (type2)) + && (result_type = common_base_type (TREE_TYPE (type1), TREE_TYPE (type2)))) + { + if (result_type == error_mark_node) + { + message_2_types (error, "common base type of types `%s' and `%s' is ambiguous", + TREE_TYPE (type1), TREE_TYPE (type2)); + result_type = ptr_type_node; + } + else result_type = TYPE_POINTER_TO (result_type); + } + else + { + pedwarn ("pointer type mismatch in conditional expression"); + result_type = ptr_type_node; + } + } + else if (code1 == POINTER_TYPE && code2 == INTEGER_TYPE) + { + if (!integer_zerop (op2)) + warning ("pointer/integer type mismatch in conditional expression"); + else + { + op2 = null_pointer_node; + if (pedantic && TREE_CODE (type1) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids conditional expr between 0 and function pointer"); + } + result_type = type1; + } + else if (code2 == POINTER_TYPE && code1 == INTEGER_TYPE) + { + if (!integer_zerop (op1)) + warning ("pointer/integer type mismatch in conditional expression"); + else + { + op1 = null_pointer_node; + if (pedantic && TREE_CODE (type2) == FUNCTION_TYPE) + pedwarn ("ANSI C++ forbids conditional expr between 0 and function pointer"); + } + result_type = type2; + op1 = null_pointer_node; + } + + if (!result_type) + { + /* The match does not look good. If either is + an aggregate value, try converting to a scalar type. */ + if (code1 == RECORD_TYPE && code2 == RECORD_TYPE) + { + message_2_types (error, "aggregate mismatch in conditional expression: `%s' vs `%s'", type1, type2); + return error_mark_node; + } + if (code1 == RECORD_TYPE && TYPE_HAS_CONVERSION (type1)) + { + tree tmp = build_type_conversion (CONVERT_EXPR, type2, op1, 0); + if (tmp == NULL_TREE) + { + cp_error ("aggregate type `%T' could not convert on lhs of `:'", type1); + return error_mark_node; + } + if (tmp == error_mark_node) + error ("ambiguous pointer conversion"); + result_type = type2; + op1 = tmp; + } + else if (code2 == RECORD_TYPE && TYPE_HAS_CONVERSION (type2)) + { + tree tmp = build_type_conversion (CONVERT_EXPR, type1, op2, 0); + if (tmp == NULL_TREE) + { + cp_error ("aggregate type `%T' could not convert on rhs of `:'", type2); + return error_mark_node; + } + if (tmp == error_mark_node) + error ("ambiguous pointer conversion"); + result_type = type1; + op2 = tmp; + } + else if (flag_cond_mismatch) + result_type = void_type_node; + else + { + error ("type mismatch in conditional expression"); + return error_mark_node; + } + } + + if (result_type != TREE_TYPE (op1)) + op1 = convert_and_check (result_type, op1); + if (result_type != TREE_TYPE (op2)) + op2 = convert_and_check (result_type, op2); + +#if 0 + /* XXX delete me, I've been here for years. */ + if (IS_AGGR_TYPE_CODE (code1)) + { + result_type = TREE_TYPE (op1); + if (TREE_CONSTANT (ifexp)) + return (integer_zerop (ifexp) ? op2 : op1); + + if (TYPE_MODE (result_type) == BLKmode) + { + register tree tempvar + = build_decl (VAR_DECL, NULL_TREE, result_type); + register tree xop1 = build_modify_expr (tempvar, NOP_EXPR, op1); + register tree xop2 = build_modify_expr (tempvar, NOP_EXPR, op2); + register tree result = fold (build (COND_EXPR, result_type, + ifexp, xop1, xop2)); + + layout_decl (tempvar, 0); + /* No way to handle variable-sized objects here. + I fear that the entire handling of BLKmode conditional exprs + needs to be redone. */ + my_friendly_assert (TREE_CONSTANT (DECL_SIZE (tempvar)), 315); + DECL_RTL (tempvar) + = assign_stack_local (DECL_MODE (tempvar), + (TREE_INT_CST_LOW (DECL_SIZE (tempvar)) + + BITS_PER_UNIT - 1) + / BITS_PER_UNIT, + 0); + + TREE_SIDE_EFFECTS (result) + = TREE_SIDE_EFFECTS (ifexp) | TREE_SIDE_EFFECTS (op1) + | TREE_SIDE_EFFECTS (op2); + return build (COMPOUND_EXPR, result_type, result, tempvar); + } + } +#endif /* 0 */ + + if (TREE_CONSTANT (ifexp)) + return integer_zerop (ifexp) ? op2 : op1; + + return fold (build (COND_EXPR, result_type, ifexp, op1, op2)); +} + +/* Handle overloading of the ',' operator when needed. Otherwise, + this function just builds an expression list. */ +tree +build_x_compound_expr (list) + tree list; +{ + tree rest = TREE_CHAIN (list); + tree result; + + if (rest == NULL_TREE) + return build_compound_expr (list); + + result = build_opfncall (COMPOUND_EXPR, LOOKUP_NORMAL, + TREE_VALUE (list), TREE_VALUE (rest), NULL_TREE); + if (result) + return build_x_compound_expr (tree_cons (NULL_TREE, result, TREE_CHAIN (rest))); + return build_compound_expr (tree_cons (NULL_TREE, TREE_VALUE (list), + build_tree_list (NULL_TREE, build_x_compound_expr (rest)))); +} + +/* Given a list of expressions, return a compound expression + that performs them all and returns the value of the last of them. */ + +tree +build_compound_expr (list) + tree list; +{ + register tree rest; + + if (TREE_READONLY_DECL_P (TREE_VALUE (list))) + TREE_VALUE (list) = decl_constant_value (TREE_VALUE (list)); + + if (TREE_CHAIN (list) == 0) + { + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since LIST is used in non-lvalue context. */ + if (TREE_CODE (list) == NOP_EXPR + && TREE_TYPE (list) == TREE_TYPE (TREE_OPERAND (list, 0))) + list = TREE_OPERAND (list, 0); + + /* Convert arrays to pointers. */ + if (TREE_CODE (TREE_TYPE (TREE_VALUE (list))) == ARRAY_TYPE) + return default_conversion (TREE_VALUE (list)); + else + return TREE_VALUE (list); + } + + rest = build_compound_expr (TREE_CHAIN (list)); + + /* When pedantic, a compound expression can be neither an lvalue + nor an integer constant expression. */ + if (! TREE_SIDE_EFFECTS (TREE_VALUE (list)) && ! pedantic) + return rest; + + return build (COMPOUND_EXPR, TREE_TYPE (rest), + break_out_cleanups (TREE_VALUE (list)), rest); +} + +/* Build an expression representing a cast to type TYPE of expression EXPR. */ + +tree +build_c_cast (type, expr) + register tree type; + tree expr; +{ + register tree value = expr; + + if (type == error_mark_node || expr == error_mark_node) + return error_mark_node; + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since VALUE is being used in non-lvalue context. */ + if (TREE_CODE (value) == NOP_EXPR + && TREE_TYPE (value) == TREE_TYPE (TREE_OPERAND (value, 0))) + value = TREE_OPERAND (value, 0); + + if (TREE_TYPE (expr) + && TREE_CODE (TREE_TYPE (expr)) == OFFSET_TYPE + && TREE_CODE (type) != OFFSET_TYPE) + value = resolve_offset_ref (value); + + if (TREE_CODE (type) == ARRAY_TYPE) + { + /* Allow casting from T1* to T2[] because Cfront allows it. + NIHCL uses it. It is not valid ANSI C however, and hence, not + valid ANSI C++. */ + if (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE) + { + if (pedantic) + pedwarn ("ANSI C++ forbids casting to an array type"); + type = build_pointer_type (TREE_TYPE (type)); + } + else + { + error ("ANSI C++ forbids casting to an array type"); + return error_mark_node; + } + } + + /* When converting into a reference type, just convert into a pointer to + the new type and deference it. While this is not exactly what ARM 5.4 + calls for [why not? -jason], it is pretty close for now. + (int &)ri ---> *(int*)&ri */ + if (TREE_CODE (type) == REFERENCE_TYPE) + { + value = build_unary_op (ADDR_EXPR, value, 0); + if (value != error_mark_node) + value = convert (build_pointer_type (TREE_TYPE (type)), value); + if (value != error_mark_node) + value = build_indirect_ref (value, "reference conversion"); + return value; + } + + if (IS_SIGNATURE (type)) + { + error ("cast specifies signature type"); + return error_mark_node; + } + + if (TREE_TYPE (value) + && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (value))) + { + /* For C++, we must copy the constness of TYPE into VALUE. */ + if (TREE_READONLY (value) != TYPE_READONLY (type)) + { + value = copy_node (value); + TREE_READONLY (value) = TYPE_READONLY (type); + } + else if (pedantic) + { + if (TREE_CODE (type) == RECORD_TYPE + || TREE_CODE (type) == UNION_TYPE) + pedwarn ("ANSI C++ forbids casting nonscalar to the same type"); + } + return value; + } + + /* If there's only one function in the overloaded space, + just take it. */ + if (TREE_CODE (value) == TREE_LIST + && TREE_CHAIN (value) == NULL_TREE) + value = TREE_VALUE (value); + + /* Make up for the fact that we do not always perform + `default_conversion' anymore. */ + if (TREE_READONLY_DECL_P (value)) + value = decl_constant_value (value); + + if (TREE_TYPE (value) == NULL_TREE + || type_unknown_p (value)) + { + value = instantiate_type (type, value, 1); + /* Did we lose? */ + if (value == error_mark_node) + return error_mark_node; + } + else + { + tree otype, ovalue; + + /* Convert functions and arrays to pointers and + convert references to their expanded types, + but don't convert any other types. */ + if (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE + || TREE_CODE (TREE_TYPE (value)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (value)) == REFERENCE_TYPE) + value = default_conversion (value); + otype = TREE_TYPE (value); + + /* Optionally warn about potentially worrisome casts. */ + + if (warn_cast_qual + && TREE_CODE (type) == POINTER_TYPE + && TREE_CODE (otype) == POINTER_TYPE) + { + /* For C++ we make these regular warnings, rather than + softening them into pedwarns. */ + if (TYPE_VOLATILE (TREE_TYPE (otype)) + && ! TYPE_VOLATILE (TREE_TYPE (type))) + warning ("cast discards `volatile' from pointer target type"); + if (TYPE_READONLY (TREE_TYPE (otype)) + && ! TYPE_READONLY (TREE_TYPE (type))) + warning ("cast discards `const' from pointer target type"); + } + + /* Warn about possible alignment problems. */ + if (STRICT_ALIGNMENT && warn_cast_align + && TREE_CODE (type) == POINTER_TYPE + && TREE_CODE (otype) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (otype)) != VOID_TYPE + && TREE_CODE (TREE_TYPE (otype)) != FUNCTION_TYPE + && TYPE_ALIGN (TREE_TYPE (type)) > TYPE_ALIGN (TREE_TYPE (otype))) + warning ("cast increases required alignment of target type"); + +#if 0 + if (TREE_CODE (type) == INTEGER_TYPE + && TREE_CODE (otype) == POINTER_TYPE + && TYPE_PRECISION (type) != TYPE_PRECISION (otype)) + warning ("cast from pointer to integer of different size"); + + if (TREE_CODE (type) == POINTER_TYPE + && TREE_CODE (otype) == INTEGER_TYPE + && TYPE_PRECISION (type) != TYPE_PRECISION (otype) + /* Don't warn about converting 0 to pointer, + provided the 0 was explicit--not cast or made by folding. */ + && !(TREE_CODE (value) == INTEGER_CST && integer_zerop (value))) + warning ("cast to pointer from integer of different size"); +#endif + + ovalue = value; + value = convert_force (type, value); + + /* Ignore any integer overflow caused by the cast. */ + if (TREE_CODE (value) == INTEGER_CST) + { + TREE_OVERFLOW (value) = TREE_OVERFLOW (ovalue); + TREE_CONSTANT_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (ovalue); + } + } + + /* Always produce some operator for an explicit cast, + so we can tell (for -pedantic) that the cast is no lvalue. + Also, pedantically, don't let (void *) (FOO *) 0 be a null + pointer constant. */ + if (value == expr + || (pedantic + && TREE_CODE (value) == INTEGER_CST + && TREE_CODE (expr) == INTEGER_CST + && TREE_CODE (TREE_TYPE (expr)) != INTEGER_TYPE)) + { + tree nvalue = build1 (NOP_EXPR, type, value); + TREE_CONSTANT (nvalue) = TREE_CONSTANT (value); + return nvalue; + } + + return value; +} + +/* Build an assignment expression of lvalue LHS from value RHS. + + In C++, if the left hand side of the assignment is a REFERENCE_TYPE, + that reference becomes deferenced down to it base type. */ + +/* Return a reference to the BASE_INDEX part of EXPR. TYPE is + the type to which BASE_INDEX applies. */ +static tree +get_base_ref (type, base_index, expr) + tree type; + int base_index; + tree expr; +{ + tree binfos = TYPE_BINFO_BASETYPES (type); + tree base_binfo = TREE_VEC_ELT (binfos, base_index); + tree ref; + + if (TREE_CODE (expr) == ARRAY_REF + || ! BINFO_OFFSET_ZEROP (base_binfo) + || TREE_VIA_VIRTUAL (base_binfo) + || TYPE_MODE (type) != TYPE_MODE (BINFO_TYPE (base_binfo))) + { + tree addr = build_unary_op (ADDR_EXPR, expr, 0); + ref = build_indirect_ref (convert_pointer_to (base_binfo, addr), + NULL_PTR); + } + else + { + ref = copy_node (expr); + TREE_TYPE (ref) = BINFO_TYPE (base_binfo); + } + return ref; +} + +#if 0 +/* Build an assignment expression of lvalue LHS from value RHS. + MODIFYCODE is the code for a binary operator that we use + to combine the old value of LHS with RHS to get the new value. + Or else MODIFYCODE is NOP_EXPR meaning do a simple assignment. + + C++: If MODIFYCODE is INIT_EXPR, then leave references unbashed. + + `build_modify_expr_1' implements recursive part of memberwise + assignment operation. */ +static tree +build_modify_expr_1 (lhs, modifycode, rhs, basetype_path) + tree lhs, rhs; + enum tree_code modifycode; + tree basetype_path; +{ + register tree result; + tree newrhs = rhs; + tree lhstype = TREE_TYPE (lhs); + tree olhstype = lhstype; + + /* Avoid duplicate error messages from operands that had errors. */ + if (TREE_CODE (lhs) == ERROR_MARK || TREE_CODE (rhs) == ERROR_MARK) + return error_mark_node; + + /* If a binary op has been requested, combine the old LHS value with the RHS + producing the value we should actually store into the LHS. */ + + if (modifycode == INIT_EXPR) + ; + else if (modifycode == NOP_EXPR) + { + /* must deal with overloading of `operator=' here. */ + if (TREE_CODE (lhstype) == REFERENCE_TYPE) + lhstype = TREE_TYPE (lhstype); + else + lhstype = olhstype; + } + else + { + lhs = stabilize_reference (lhs); + newrhs = build_binary_op (modifycode, lhs, rhs, 1); + modifycode = NOP_EXPR; + } + + /* If storing into a structure or union member, + it has probably been given type `int'. + Compute the type that would go with + the actual amount of storage the member occupies. */ + + if (TREE_CODE (lhs) == COMPONENT_REF + && (TREE_CODE (lhstype) == INTEGER_TYPE + || TREE_CODE (lhstype) == REAL_TYPE + || TREE_CODE (lhstype) == ENUMERAL_TYPE)) + lhstype = TREE_TYPE (get_unwidened (lhs, 0)); + + /* C++: The semantics of C++ differ from those of C when an + assignment of an aggregate is desired. Assignment in C++ is + now defined as memberwise assignment of non-static members + and base class objects. This rule applies recursively + until a member of a built-in type is found. + + Also, we cannot do a bit-wise copy of aggregates which + contain virtual function table pointers. Those + pointer values must be preserved through the copy. + However, this is handled in expand_expr, and not here. + This is because much better code can be generated at + that stage than this one. */ + if (TREE_CODE (lhstype) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (lhstype) + && TYPE_MAIN_VARIANT (lhstype) == TYPE_MAIN_VARIANT (TREE_TYPE (newrhs))) + { + register tree elt; + int i; + + /* Perform operation on object. */ + if (modifycode == INIT_EXPR && TYPE_HAS_INIT_REF (lhstype)) + { + result = build_method_call (lhs, constructor_name_full (lhstype), + build_tree_list (NULL_TREE, rhs), + basetype_path, LOOKUP_NORMAL); + return build_indirect_ref (result, NULL_PTR); + } + else if (modifycode == NOP_EXPR) + { + /* `operator=' is not an inheritable operator; see 13.4.3. */ + if (TYPE_LANG_SPECIFIC (lhstype) && TYPE_HAS_ASSIGNMENT (lhstype)) + { + result = build_opfncall (MODIFY_EXPR, LOOKUP_NORMAL, + lhs, rhs, make_node (NOP_EXPR)); + if (result == NULL_TREE) + return error_mark_node; + return result; + } + } + + if (TYPE_USES_VIRTUAL_BASECLASSES (lhstype) + || (modifycode == NOP_EXPR && TYPE_GETS_ASSIGNMENT (lhstype)) + || (modifycode == INIT_EXPR && TYPE_GETS_INIT_REF (lhstype))) + { + tree binfos = BINFO_BASETYPES (TYPE_BINFO (lhstype)); + result = NULL_TREE; + + if (binfos != NULL_TREE) + /* Perform operation on each member, depth-first, left-right. */ + for (i = 0; i <= TREE_VEC_LENGTH (binfos)-1; i++) + { + tree base_binfo = TREE_VEC_ELT (binfos, i); + tree base_lhs, base_rhs; + tree new_result; + + /* Assignments from virtual baseclasses handled elsewhere. */ + if (TREE_VIA_VIRTUAL (base_binfo)) + continue; + + base_lhs = get_base_ref (lhstype, i, lhs); + base_rhs = get_base_ref (lhstype, i, newrhs); + + BINFO_INHERITANCE_CHAIN (base_binfo) = basetype_path; + new_result + = build_modify_expr_1 (base_lhs, modifycode, base_rhs, + base_binfo); + + /* We either get back a compound stmt, or a simple one. */ + if (new_result && TREE_CODE (new_result) == TREE_LIST) + new_result = build_compound_expr (new_result); + result = tree_cons (NULL_TREE, new_result, result); + } + + for (elt = TYPE_FIELDS (lhstype); elt; elt = TREE_CHAIN (elt)) + { + tree vbases = NULL_TREE; + tree elt_lhs, elt_rhs; + + if (TREE_CODE (elt) != FIELD_DECL) + continue; + if (DECL_NAME (elt) + && (VFIELD_NAME_P (DECL_NAME (elt)) + || VBASE_NAME_P (DECL_NAME (elt)))) + continue; + + if (TREE_READONLY (elt) + || TREE_CODE (TREE_TYPE (elt)) == REFERENCE_TYPE) + { + cp_error ("cannot generate default `%T::operator ='", + lhstype); + if (TREE_CODE (TREE_TYPE (elt)) == REFERENCE_TYPE) + cp_error_at ("because member `%#D' is a reference", elt); + else + cp_error_at ("because member `%#D' is const", elt); + + return error_mark_node; + } + + if (IS_AGGR_TYPE (TREE_TYPE (elt)) + && TYPE_LANG_SPECIFIC (TREE_TYPE (elt))) + vbases = CLASSTYPE_VBASECLASSES (TREE_TYPE (elt)); + + elt_lhs = build (COMPONENT_REF, TREE_TYPE (elt), lhs, elt); + elt_rhs = build (COMPONENT_REF, TREE_TYPE (elt), newrhs, elt); + /* It is not always safe to go through `build_modify_expr_1' + when performing element-wise copying. This is because + an element may be of ARRAY_TYPE, which will not + be properly copied as a naked element. */ + if (TREE_CODE (TREE_TYPE (elt)) == RECORD_TYPE + && TYPE_LANG_SPECIFIC (TREE_TYPE (elt))) + basetype_path = TYPE_BINFO (TREE_TYPE (elt)); + + while (vbases) + { + tree elt_lhs_addr = build_unary_op (ADDR_EXPR, elt_lhs, 0); + tree elt_rhs_addr = build_unary_op (ADDR_EXPR, elt_rhs, 0); + + elt_lhs_addr = convert_pointer_to (vbases, elt_lhs_addr); + elt_rhs_addr = convert_pointer_to (vbases, elt_rhs_addr); + result + = tree_cons (NULL_TREE, + build_modify_expr_1 + (build_indirect_ref (elt_lhs_addr, NULL_PTR), + modifycode, + build_indirect_ref (elt_rhs_addr, NULL_PTR), + basetype_path), + result); + if (TREE_VALUE (result) == error_mark_node) + return error_mark_node; + vbases = TREE_CHAIN (vbases); + } + elt_lhs = build_modify_expr_1 (elt_lhs, modifycode, elt_rhs, + basetype_path); + result = tree_cons (NULL_TREE, elt_lhs, result); + } + + if (result) + return build_compound_expr (result); + /* No fields to move. */ + return integer_zero_node; + } + else + { + result = build (modifycode == NOP_EXPR ? MODIFY_EXPR : INIT_EXPR, + void_type_node, lhs, rhs); + TREE_SIDE_EFFECTS (result) = 1; + return result; + } + } + + result = build_modify_expr (lhs, modifycode, newrhs); + /* ARRAY_TYPEs cannot be converted to anything meaningful, + and leaving it there screws up `build_compound_expr' when + it tries to defaultly convert everything. */ + if (TREE_CODE (TREE_TYPE (result)) == ARRAY_TYPE) + TREE_TYPE (result) = void_type_node; + return result; +} +#endif + +/* Taken from expr.c: + Subroutine of expand_expr: + record the non-copied parts (LIST) of an expr (LHS), and return a list + which specifies the initial values of these parts. */ + +static tree +init_noncopied_parts (lhs, list) + tree lhs; + tree list; +{ + tree tail; + tree parts = 0; + + for (tail = list; tail; tail = TREE_CHAIN (tail)) + if (TREE_CODE (TREE_VALUE (tail)) == TREE_LIST) + parts = chainon (parts, init_noncopied_parts (lhs, TREE_VALUE (tail))); + else + { + tree part = TREE_VALUE (tail); + tree part_type = TREE_TYPE (part); + tree to_be_initialized = build (COMPONENT_REF, part_type, lhs, part); + parts = tree_cons (TREE_PURPOSE (tail), to_be_initialized, parts); + } + return parts; +} + +/* Build an assignment expression of lvalue LHS from value RHS. + MODIFYCODE is the code for a binary operator that we use + to combine the old value of LHS with RHS to get the new value. + Or else MODIFYCODE is NOP_EXPR meaning do a simple assignment. + + C++: If MODIFYCODE is INIT_EXPR, then leave references unbashed. +*/ +tree +build_modify_expr (lhs, modifycode, rhs) + tree lhs; + enum tree_code modifycode; + tree rhs; +{ + register tree result; + tree newrhs = rhs; + tree lhstype = TREE_TYPE (lhs); + tree olhstype = lhstype; + + /* Types that aren't fully specified cannot be used in assignments. */ + lhs = require_complete_type (lhs); + + /* Avoid duplicate error messages from operands that had errors. */ + if (TREE_CODE (lhs) == ERROR_MARK || TREE_CODE (rhs) == ERROR_MARK) + return error_mark_node; + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since RHS is being used in non-lvalue context. */ + if (TREE_CODE (rhs) == NOP_EXPR + && TREE_TYPE (rhs) == TREE_TYPE (TREE_OPERAND (rhs, 0))) + rhs = TREE_OPERAND (rhs, 0); + + /* Decide early if we are going to protect RHS from GC + before assigning it to LHS. */ + if (type_needs_gc_entry (TREE_TYPE (rhs)) + && ! value_safe_from_gc (lhs, rhs)) + rhs = protect_value_from_gc (lhs, rhs); + + newrhs = rhs; + + /* Handle assignment to signature pointers/refs. */ + + if (TYPE_LANG_SPECIFIC (lhstype) && + (IS_SIGNATURE_POINTER (lhstype) || IS_SIGNATURE_REFERENCE (lhstype))) + { + return build_signature_pointer_constructor (lhs, rhs); + } + + /* Handle control structure constructs used as "lvalues". */ + + switch (TREE_CODE (lhs)) + { + /* Handle --foo = 5; as these are valid constructs in C++ */ + case PREDECREMENT_EXPR: + case PREINCREMENT_EXPR: + if (TREE_SIDE_EFFECTS (TREE_OPERAND (lhs, 0))) + lhs = build (TREE_CODE (lhs), TREE_TYPE (lhs), + stabilize_reference (TREE_OPERAND (lhs, 0))); + return build (COMPOUND_EXPR, lhstype, + lhs, + build_modify_expr (TREE_OPERAND (lhs, 0), + modifycode, rhs)); + + /* Handle (a, b) used as an "lvalue". */ + case COMPOUND_EXPR: + pedantic_lvalue_warning (COMPOUND_EXPR); + newrhs = build_modify_expr (TREE_OPERAND (lhs, 1), + modifycode, rhs); + if (TREE_CODE (newrhs) == ERROR_MARK) + return error_mark_node; + return build (COMPOUND_EXPR, lhstype, + TREE_OPERAND (lhs, 0), newrhs); + + /* Handle (a ? b : c) used as an "lvalue". */ + case COND_EXPR: + pedantic_lvalue_warning (COND_EXPR); + rhs = save_expr (rhs); + { + /* Produce (a ? (b = rhs) : (c = rhs)) + except that the RHS goes through a save-expr + so the code to compute it is only emitted once. */ + tree cond + = build_conditional_expr (TREE_OPERAND (lhs, 0), + build_modify_expr (TREE_OPERAND (lhs, 1), + modifycode, rhs), + build_modify_expr (TREE_OPERAND (lhs, 2), + modifycode, rhs)); + if (TREE_CODE (cond) == ERROR_MARK) + return cond; + /* Make sure the code to compute the rhs comes out + before the split. */ + return build (COMPOUND_EXPR, TREE_TYPE (lhs), + /* Case to void to suppress warning + from warn_if_unused_value. */ + convert (void_type_node, rhs), cond); + } + } + + /* If a binary op has been requested, combine the old LHS value with the RHS + producing the value we should actually store into the LHS. */ + + if (modifycode == INIT_EXPR) + { + if (TYPE_LANG_SPECIFIC (lhstype) && TYPE_HAS_CONSTRUCTOR (lhstype)) + { + result = build_method_call (lhs, constructor_name_full (lhstype), + build_tree_list (NULL_TREE, rhs), + NULL_TREE, LOOKUP_NORMAL); + if (result == NULL_TREE) + return error_mark_node; + return result; + } + } + else if (modifycode == NOP_EXPR) + { + /* must deal with overloading of `operator=' here. */ + if (TREE_CODE (lhstype) == REFERENCE_TYPE) + lhstype = TREE_TYPE (lhstype); +#if 1 + /* `operator=' is not an inheritable operator. */ + if (TYPE_LANG_SPECIFIC (lhstype) && TYPE_HAS_ASSIGNMENT (lhstype)) + { + result = build_opfncall (MODIFY_EXPR, LOOKUP_NORMAL, + lhs, rhs, make_node (NOP_EXPR)); + if (result == NULL_TREE) + return error_mark_node; + return result; + } +#else + /* Treat `operator=' as an inheritable operator. */ + if (TYPE_LANG_SPECIFIC (lhstype) && TYPE_GETS_ASSIGNMENT (lhstype)) + { + tree orig_lhstype = lhstype; + while (! TYPE_HAS_ASSIGNMENT (lhstype)) + { + int i, n_baseclasses = CLASSTYPE_N_BASECLASSES (lhstype); + tree basetype = NULL_TREE; + for (i = 0; i < n_baseclasses; i++) + if (TYPE_GETS_ASSIGNMENT (TYPE_BINFO_BASETYPE (lhstype, i))) + { + if (basetype != NULL_TREE) + { + message_2_types (error, "base classes `%s' and `%s' both have operator ='", + basetype, + TYPE_BINFO_BASETYPE (lhstype, i)); + return error_mark_node; + } + basetype = TYPE_BINFO_BASETYPE (lhstype, i); + } + lhstype = basetype; + } + if (orig_lhstype != lhstype) + { + lhs = build_indirect_ref (convert_pointer_to (lhstype, + build_unary_op (ADDR_EXPR, lhs, 0)), NULL_PTR); + if (lhs == error_mark_node) + { + cp_error ("conversion to private basetype `%T'", lhstype); + return error_mark_node; + } + } + result = build_opfncall (MODIFY_EXPR, LOOKUP_NORMAL, + lhs, rhs, make_node (NOP_EXPR)); + if (result == NULL_TREE) + return error_mark_node; + return result; + } +#endif + lhstype = olhstype; + } + else if (PROMOTES_TO_AGGR_TYPE (lhstype, REFERENCE_TYPE)) + { + /* This case must convert to some sort of lvalue that + can participate in an op= operation. */ + tree lhs_tmp = lhs; + tree rhs_tmp = rhs; + if (build_default_binary_type_conversion (modifycode, &lhs_tmp, &rhs_tmp)) + { + lhs = stabilize_reference (lhs_tmp); + /* Forget is was ever anything else. */ + olhstype = lhstype = TREE_TYPE (lhs); + newrhs = build_binary_op (modifycode, lhs, rhs_tmp, 1); + } + else + return error_mark_node; + } + else + { + lhs = stabilize_reference (lhs); + newrhs = build_binary_op (modifycode, lhs, rhs, 1); + } + + /* Handle a cast used as an "lvalue". + We have already performed any binary operator using the value as cast. + Now convert the result to the cast type of the lhs, + and then true type of the lhs and store it there; + then convert result back to the cast type to be the value + of the assignment. */ + + switch (TREE_CODE (lhs)) + { + case NOP_EXPR: + case CONVERT_EXPR: + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + case FIX_FLOOR_EXPR: + case FIX_ROUND_EXPR: + case FIX_CEIL_EXPR: + if (TREE_CODE (TREE_TYPE (newrhs)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (newrhs)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (newrhs)) == METHOD_TYPE + || TREE_CODE (TREE_TYPE (newrhs)) == OFFSET_TYPE) + newrhs = default_conversion (newrhs); + { + tree inner_lhs = TREE_OPERAND (lhs, 0); + tree result; + result = build_modify_expr (inner_lhs, NOP_EXPR, + convert (TREE_TYPE (inner_lhs), + convert (lhstype, newrhs))); + if (TREE_CODE (result) == ERROR_MARK) + return result; + return convert (TREE_TYPE (lhs), result); + } + } + + if (TREE_CODE (lhs) == OFFSET_REF) + { + if (TREE_OPERAND (lhs, 0) == NULL_TREE) + { + /* Static class member? */ + tree member = TREE_OPERAND (lhs, 1); + if (TREE_CODE (member) == VAR_DECL) + lhs = member; + else + { + compiler_error ("invalid static class member"); + return error_mark_node; + } + } + else + lhs = resolve_offset_ref (lhs); + } + + /* Now we have handled acceptable kinds of LHS that are not truly lvalues. + Reject anything strange now. */ + + if (!lvalue_or_else (lhs, "assignment")) + return error_mark_node; + + GNU_xref_assign (lhs); + + /* Warn about storing in something that is `const'. */ + /* For C++, don't warn if this is initialization. */ + if (modifycode != INIT_EXPR + /* For assignment to `const' signature pointer/reference fields, + don't warn either, we already printed a better message before. */ + && ! (TREE_CODE (lhs) == COMPONENT_REF + && (IS_SIGNATURE_POINTER (TREE_TYPE (TREE_OPERAND (lhs, 0))) + || IS_SIGNATURE_REFERENCE (TREE_TYPE (TREE_OPERAND (lhs, 0))))) + && (TREE_READONLY (lhs) || TYPE_READONLY (lhstype) + || ((TREE_CODE (lhstype) == RECORD_TYPE + || TREE_CODE (lhstype) == UNION_TYPE) + && C_TYPE_FIELDS_READONLY (lhstype)) + || (TREE_CODE (lhstype) == REFERENCE_TYPE + && TYPE_READONLY (TREE_TYPE (lhstype))))) + readonly_error (lhs, "assignment", 0); + + /* If storing into a structure or union member, + it has probably been given type `int'. + Compute the type that would go with + the actual amount of storage the member occupies. */ + + if (TREE_CODE (lhs) == COMPONENT_REF + && (TREE_CODE (lhstype) == INTEGER_TYPE + || TREE_CODE (lhstype) == REAL_TYPE + || TREE_CODE (lhstype) == ENUMERAL_TYPE)) + lhstype = TREE_TYPE (get_unwidened (lhs, 0)); + + /* check to see if there is an assignment to `this' */ + if (lhs == current_class_decl) + { + if (flag_this_is_variable > 0 + && DECL_NAME (current_function_decl) != NULL_TREE + && current_class_name != DECL_NAME (current_function_decl)) + warning ("assignment to `this' not in constructor or destructor"); + current_function_just_assigned_this = 1; + } + + /* The TREE_TYPE of RHS may be TYPE_UNKNOWN. This can happen + when the type of RHS is not yet known, i.e. its type + is inherited from LHS. */ + rhs = require_instantiated_type (lhstype, newrhs, error_mark_node); + if (rhs == error_mark_node) + return error_mark_node; + newrhs = rhs; + + if (modifycode != INIT_EXPR) + { + /* Make modifycode now either a NOP_EXPR or an INIT_EXPR. */ + modifycode = NOP_EXPR; + /* Reference-bashing */ + if (TREE_CODE (lhstype) == REFERENCE_TYPE) + { + tree tmp = convert_from_reference (lhs); + lhstype = TREE_TYPE (tmp); + if (TYPE_SIZE (lhstype) == 0) + { + incomplete_type_error (lhs, lhstype); + return error_mark_node; + } + lhs = tmp; + olhstype = lhstype; + } + if (TREE_CODE (TREE_TYPE (newrhs)) == REFERENCE_TYPE) + { + tree tmp = convert_from_reference (newrhs); + if (TYPE_SIZE (TREE_TYPE (tmp)) == 0) + { + incomplete_type_error (newrhs, TREE_TYPE (tmp)); + return error_mark_node; + } + newrhs = tmp; + } + } + + if (TREE_SIDE_EFFECTS (lhs)) + lhs = stabilize_reference (lhs); + if (TREE_SIDE_EFFECTS (newrhs)) + newrhs = stabilize_reference (newrhs); + + /* C++: The semantics of C++ differ from those of C when an + assignment of an aggregate is desired. Assignment in C++ is + now defined as memberwise assignment of non-static members + and base class objects. This rule applies recursively + until a member of a built-in type is found. + + Also, we cannot do a bit-wise copy of aggregates which + contain virtual function table pointers. Those + pointer values must be preserved through the copy. + However, this is handled in expand_expr, and not here. + This is because much better code can be generated at + that stage than this one. */ + if (TREE_CODE (lhstype) == RECORD_TYPE + && ! TYPE_PTRMEMFUNC_P (lhstype) + && (TYPE_MAIN_VARIANT (lhstype) == TYPE_MAIN_VARIANT (TREE_TYPE (newrhs)) + || (TREE_CODE (TREE_TYPE (newrhs)) == RECORD_TYPE + && UNIQUELY_DERIVED_FROM_P (lhstype, TREE_TYPE (newrhs))))) + { + /* This was decided in finish_struct. */ + if (modifycode == INIT_EXPR) + cp_error ("can't generate default copy constructor for `%T'", lhstype); + else + cp_error ("can't generate default assignment operator for `%T'", + lhstype); +#if 0 + /* This is now done by generating X(X&) and operator=(X&). */ + tree vbases = CLASSTYPE_VBASECLASSES (lhstype); + tree lhs_addr = build_unary_op (ADDR_EXPR, lhs, 0); + tree rhs_addr; + + /* Memberwise assignment would cause NEWRHS to be + evaluated for every member that gets assigned. + By wrapping side-effecting exprs in a SAVE_EXPR, + NEWRHS will only be evaluated once. */ + if (IS_AGGR_TYPE (TREE_TYPE (newrhs)) + && TREE_SIDE_EFFECTS (newrhs) + /* This are things we don't have to save. */ + && TREE_CODE (newrhs) != COND_EXPR + && TREE_CODE (newrhs) != TARGET_EXPR + && TREE_CODE (newrhs) != WITH_CLEANUP_EXPR) + /* Call `break_out_cleanups' on NEWRHS in case there are cleanups. + If NEWRHS is a CALL_EXPR that needs a cleanup, failure to do so + will result in expand_expr expanding the call without knowing + that it should run the cleanup. */ + newrhs = save_expr (break_out_cleanups (newrhs)); + + if (TREE_CODE (newrhs) == COND_EXPR) + rhs_addr = rationalize_conditional_expr (ADDR_EXPR, newrhs); + else + rhs_addr = build_unary_op (ADDR_EXPR, newrhs, 0); + + result = tree_cons (NULL_TREE, + convert (build_reference_type (lhstype), lhs), + NULL_TREE); + + if (! comptypes (TREE_TYPE (lhs_addr), TREE_TYPE (rhs_addr), 1)) + rhs_addr = convert_pointer_to (TREE_TYPE (TREE_TYPE (lhs_addr)), rhs_addr); + { + tree noncopied_parts = NULL_TREE; + + if (TYPE_NONCOPIED_PARTS (lhstype) != 0) + noncopied_parts = init_noncopied_parts (lhs, + TYPE_NONCOPIED_PARTS (lhstype)); + while (noncopied_parts != 0) + { + result = tree_cons (NULL_TREE, + build_modify_expr (convert (ptr_type_node, TREE_VALUE (noncopied_parts)), + NOP_EXPR, + TREE_PURPOSE (noncopied_parts)), + result); + noncopied_parts = TREE_CHAIN (noncopied_parts); + } + } + /* Once we have our hands on an address, we must change NEWRHS + to work from there. Otherwise we can get multiple evaluations + of NEWRHS. */ + if (TREE_CODE (newrhs) != SAVE_EXPR) + newrhs = build_indirect_ref (rhs_addr, NULL_PTR); + + while (vbases) + { + tree elt_lhs = convert_pointer_to (vbases, lhs_addr); + tree elt_rhs = convert_pointer_to (vbases, rhs_addr); + result + = tree_cons (NULL_TREE, + build_modify_expr_1 (build_indirect_ref (elt_lhs, NULL_PTR), + modifycode, + build_indirect_ref (elt_rhs, NULL_PTR), + TYPE_BINFO (lhstype)), + result); + if (TREE_VALUE (result) == error_mark_node) + return error_mark_node; + vbases = TREE_CHAIN (vbases); + } + result = tree_cons (NULL_TREE, + build_modify_expr_1 (lhs, + modifycode, + newrhs, + TYPE_BINFO (lhstype)), + result); + return build_compound_expr (result); +#endif + } + + /* If storing in a field that is in actuality a short or narrower than one, + we must store in the field in its actual type. */ + + if (lhstype != TREE_TYPE (lhs)) + { + lhs = copy_node (lhs); + TREE_TYPE (lhs) = lhstype; + } + + /* Convert new value to destination type. */ + + if (TREE_CODE (lhstype) == ARRAY_TYPE) + { + /* Have to wrap this in RTL_EXPR for two cases: + in base or member initialization and if we + are a branch of a ?: operator. Since we + can't easily know the latter, just do it always. */ + + result = make_node (RTL_EXPR); + + TREE_TYPE (result) = void_type_node; + do_pending_stack_adjust (); + start_sequence_for_rtl_expr (result); + + /* As a matter of principle, `start_sequence' should do this. */ + emit_note (0, -1); + + expand_vec_init (lhs, lhs, array_type_nelts (lhstype), newrhs, + 1 + (modifycode != INIT_EXPR)); + + do_pending_stack_adjust (); + + TREE_SIDE_EFFECTS (result) = 1; + RTL_EXPR_SEQUENCE (result) = get_insns (); + RTL_EXPR_RTL (result) = const0_rtx; + end_sequence (); + return result; + } + + if (modifycode == INIT_EXPR) + { + newrhs = convert_for_initialization (lhs, lhstype, newrhs, LOOKUP_NORMAL, + "assignment", NULL_TREE, 0); + if (lhs == DECL_RESULT (current_function_decl)) + { + if (DECL_INITIAL (lhs)) + warning ("return value from function receives multiple initializations"); + DECL_INITIAL (lhs) = newrhs; + } + } + else + { + if (IS_AGGR_TYPE (lhstype)) + { + if (result = build_opfncall (MODIFY_EXPR, + LOOKUP_NORMAL, lhs, newrhs, + make_node (NOP_EXPR))) + return result; + } + /* Avoid warnings on enum bit fields. */ + if (TREE_CODE (olhstype) == ENUMERAL_TYPE + && TREE_CODE (lhstype) == INTEGER_TYPE) + { + newrhs = convert_for_assignment (olhstype, newrhs, "assignment", + NULL_TREE, 0); + newrhs = convert_force (lhstype, newrhs); + } + else + newrhs = convert_for_assignment (lhstype, newrhs, "assignment", + NULL_TREE, 0); + if (flag_elide_constructors == 0 + && TREE_CODE (newrhs) == CALL_EXPR + && TREE_ADDRESSABLE (lhstype)) + { + /* Can't initialized directly from a CALL_EXPR, since + we don't know about what doesn't alias what. */ + + tree temp = get_temp_name (lhstype, 0); + newrhs = build (COMPOUND_EXPR, lhstype, + build_modify_expr (temp, INIT_EXPR, newrhs), + temp); + } + } + + if (TREE_CODE (newrhs) == ERROR_MARK) + return error_mark_node; + + if (TREE_CODE (newrhs) == COND_EXPR) + { + tree lhs1; + tree cond = TREE_OPERAND (newrhs, 0); + + if (TREE_SIDE_EFFECTS (lhs)) + cond = build_compound_expr (tree_cons + (NULL_TREE, lhs, + build_tree_list (NULL_TREE, cond))); + + /* Cannot have two identical lhs on this one tree (result) as preexpand + calls will rip them out and fill in RTL for them, but when the + rtl is generated, the calls will only be in the first side of the + condition, not on both, or before the conditional jump! (mrs) */ + lhs1 = break_out_calls (lhs); + + if (lhs == lhs1) + /* If there's no change, the COND_EXPR behaves like any other rhs. */ + result = build (modifycode == NOP_EXPR ? MODIFY_EXPR : INIT_EXPR, + lhstype, lhs, newrhs); + else + { + tree result_type = TREE_TYPE (newrhs); + /* We have to convert each arm to the proper type because the + types may have been munged by constant folding. */ + result + = build (COND_EXPR, result_type, cond, + build_modify_expr (lhs, modifycode, + convert (result_type, + TREE_OPERAND (newrhs, 1))), + build_modify_expr (lhs1, modifycode, + convert (result_type, + TREE_OPERAND (newrhs, 2)))); + } + } + else if (modifycode != INIT_EXPR && TREE_CODE (newrhs) == WITH_CLEANUP_EXPR) + { + tree cleanup = TREE_OPERAND (newrhs, 2); + tree slot; + + /* Finish up by running cleanups and having the "value" of the lhs. */ + tree exprlist = tree_cons (NULL_TREE, cleanup, + build_tree_list (NULL_TREE, lhs)); + newrhs = TREE_OPERAND (newrhs, 0); + if (TREE_CODE (newrhs) == TARGET_EXPR) + slot = TREE_OPERAND (newrhs, 0); + else if (TREE_CODE (newrhs) == ADDR_EXPR) + { + /* Bad but legal. */ + slot = newrhs; + warning ("address taken of temporary object"); + } + else + my_friendly_abort (118); + + /* Copy the value computed in SLOT into LHS. */ + exprlist = tree_cons (NULL_TREE, + build_modify_expr (lhs, modifycode, slot), + exprlist); + /* Evaluate the expression that needs CLEANUP. This will + compute the value into SLOT. */ + exprlist = tree_cons (NULL_TREE, newrhs, exprlist); + result = convert (lhstype, build_compound_expr (exprlist)); + } + else + result = build (modifycode == NOP_EXPR ? MODIFY_EXPR : INIT_EXPR, + lhstype, lhs, newrhs); + TREE_SIDE_EFFECTS (result) = 1; + + /* If we got the LHS in a different type for storing in, + convert the result back to the nominal type of LHS + so that the value we return always has the same type + as the LHS argument. */ + + if (olhstype == TREE_TYPE (result)) + return result; + /* Avoid warnings converting integral types back into enums + for enum bit fields. */ + if (TREE_CODE (TREE_TYPE (result)) == INTEGER_TYPE + && TREE_CODE (olhstype) == ENUMERAL_TYPE) + return convert_force (olhstype, result); + return convert_for_assignment (olhstype, result, "assignment", + NULL_TREE, 0); +} + + +/* Return 0 if EXP is not a valid lvalue in this language + even though `lvalue_or_else' would accept it. */ + +int +language_lvalue_valid (exp) + tree exp; +{ + return 1; +} + +/* Build a constructor for a pointer to member function. It can be + used to initialize global variables, local variable, or used + as a value in expressions. TYPE is the POINTER to METHOD_TYPE we + want to be. + + If FORCE is non-zero, then force this conversion, even if + we would rather not do it. Usually set when using an explicit + cast. */ + +tree +build_ptrmemfunc (type, pfn, force) + tree type, pfn; + int force; +{ + tree index; + tree delta = integer_zero_node; + tree delta2 = integer_zero_node; + tree vfield_offset; + tree npfn; + tree u; + + /* Handle null pointer to member function conversions. */ + if (integer_zerop (pfn)) + { + pfn = build_c_cast (type, integer_zero_node); + u = build_nt (CONSTRUCTOR, 0, tree_cons (pfn_identifier, pfn, NULL_TREE)); + return build_nt (CONSTRUCTOR, 0, tree_cons (NULL_TREE, integer_zero_node, + tree_cons (NULL_TREE, integer_zero_node, + tree_cons (NULL_TREE, u, NULL_TREE)))); + } + + /* Allow pointer to member conversions here. */ + if (type != TREE_TYPE (pfn)) + { + tree binfo + = get_binfo (TYPE_METHOD_BASETYPE (TREE_TYPE (TREE_TYPE (pfn))), + TYPE_METHOD_BASETYPE (TREE_TYPE (type)), + 1); + if (binfo == error_mark_node) + { + error (" in pointer to member function conversion"); + return NULL_TREE; + } + if (binfo == 0) + { + if (!force) + { + error_not_base_type (TYPE_METHOD_BASETYPE (TREE_TYPE (TREE_TYPE (pfn))), + TYPE_METHOD_BASETYPE (TREE_TYPE (type))); + error (" in pointer to member function conversion"); + return NULL_TREE; + } + /* Just something handy with an offset of zero. */ + binfo = TYPE_BINFO (TYPE_METHOD_BASETYPE (TREE_TYPE (type))); + } + if (TREE_VIA_VIRTUAL (binfo)) + { + sorry ("pointer to member conversion from virtual base class"); + } + delta = BINFO_OFFSET (binfo); + delta2 = size_binop (PLUS_EXPR, delta2, delta); + } + + + if (TREE_CODE (TREE_OPERAND (pfn, 0)) != FUNCTION_DECL) + warning ("assuming pointer to member function is non-virtual"); + + if (TREE_CODE (TREE_OPERAND (pfn, 0)) == FUNCTION_DECL + && DECL_VINDEX (TREE_OPERAND (pfn, 0))) + { + /* Find the offset to the vfield pointer in the object. */ + vfield_offset = TYPE_METHOD_BASETYPE (TREE_TYPE (TREE_TYPE (pfn))); + vfield_offset = CLASSTYPE_VFIELD (vfield_offset); + vfield_offset = DECL_FIELD_BITPOS (vfield_offset); + vfield_offset = size_binop (FLOOR_DIV_EXPR, vfield_offset, size_int (BITS_PER_UNIT)); + delta2 = size_binop (PLUS_EXPR, vfield_offset, delta2); + + /* Map everything down one to make room for the null pointer to member. */ + index = size_binop (PLUS_EXPR, + DECL_VINDEX (TREE_OPERAND (pfn, 0)), + integer_one_node); + u = build_nt (CONSTRUCTOR, 0, tree_cons (delta2_identifier, delta2, NULL_TREE)); + + return build_nt (CONSTRUCTOR, 0, tree_cons (NULL_TREE, delta, + tree_cons (NULL_TREE, index, + tree_cons (NULL_TREE, u, NULL_TREE)))); + } + else + index = size_binop (MINUS_EXPR, integer_zero_node, integer_one_node); + + npfn = build1 (NOP_EXPR, type, pfn); + TREE_CONSTANT (npfn) = TREE_CONSTANT (pfn); + + u = build_nt (CONSTRUCTOR, 0, tree_cons (pfn_identifier, npfn, NULL_TREE)); + + return build_nt (CONSTRUCTOR, 0, tree_cons (NULL_TREE, delta, + tree_cons (NULL_TREE, index, + tree_cons (NULL_TREE, u, NULL_TREE)))); +} + +/* Convert value RHS to type TYPE as preparation for an assignment + to an lvalue of type TYPE. + The real work of conversion is done by `convert'. + The purpose of this function is to generate error messages + for assignments that are not allowed in C. + ERRTYPE is a string to use in error messages: + "assignment", "return", etc. + + C++: attempts to allow `convert' to find conversions involving + implicit type conversion between aggregate and scalar types + as per 8.5.6 of C++ manual. Does not randomly dereference + pointers to aggregates! */ + +static tree +convert_for_assignment (type, rhs, errtype, fndecl, parmnum) + tree type, rhs; + char *errtype; + tree fndecl; + int parmnum; +{ + register enum tree_code codel = TREE_CODE (type); + register tree rhstype; + register enum tree_code coder = TREE_CODE (TREE_TYPE (rhs)); + + if (coder == UNKNOWN_TYPE) + rhs = instantiate_type (type, rhs, 1); + + if (coder == ERROR_MARK) + return error_mark_node; + + if (codel == OFFSET_TYPE) + { + type = TREE_TYPE (type); + codel = TREE_CODE (type); + } + + /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */ + if (TREE_CODE (rhs) == NON_LVALUE_EXPR) + rhs = TREE_OPERAND (rhs, 0); + + if (rhs == error_mark_node) + return error_mark_node; + + if (TREE_VALUE (rhs) == error_mark_node) + return error_mark_node; + + if (TREE_CODE (TREE_TYPE (rhs)) == OFFSET_TYPE) + { + rhs = resolve_offset_ref (rhs); + if (rhs == error_mark_node) + return error_mark_node; + rhstype = TREE_TYPE (rhs); + coder = TREE_CODE (rhstype); + } + + if (TREE_CODE (TREE_TYPE (rhs)) == ARRAY_TYPE + || TREE_CODE (TREE_TYPE (rhs)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (rhs)) == METHOD_TYPE) + rhs = default_conversion (rhs); + else if (TREE_CODE (TREE_TYPE (rhs)) == REFERENCE_TYPE) + rhs = convert_from_reference (rhs); + + rhstype = TREE_TYPE (rhs); + coder = TREE_CODE (rhstype); + + /* This should no longer change types on us. */ + if (TREE_CODE (rhs) == CONST_DECL) + rhs = DECL_INITIAL (rhs); + else if (TREE_READONLY_DECL_P (rhs)) + rhs = decl_constant_value (rhs); + + if (type == rhstype) + { + overflow_warning (rhs); + return rhs; + } + + if (coder == VOID_TYPE) + { + error ("void value not ignored as it ought to be"); + return error_mark_node; + } + /* Arithmetic types all interconvert. */ + if ((codel == INTEGER_TYPE || codel == REAL_TYPE) + && (coder == INTEGER_TYPE || coder == REAL_TYPE)) + { + /* But we should warn if assigning REAL_TYPE to INTEGER_TYPE. */ + if (coder == REAL_TYPE && codel == INTEGER_TYPE) + { + if (fndecl) + cp_warning ("`%T' used for argument %P of `%D'", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T'", errtype, type, rhstype); + } + /* And we should warn if assigning a negative value to + an unsigned variable. */ + else if (TREE_UNSIGNED (type)) + { + if (TREE_CODE (rhs) == INTEGER_CST + && TREE_NEGATED_INT (rhs)) + { + if (fndecl) + cp_warning ("negative value `%E' passed as argument %P of `%D'", + rhs, parmnum, fndecl); + else + cp_warning ("%s of negative value `%E' to `%T'", + errtype, rhs, type); + } + overflow_warning (rhs); + if (TREE_CONSTANT (rhs)) + rhs = fold (rhs); + } + + return convert_and_check (type, rhs); + } + /* Conversions involving enums. */ + else if ((codel == ENUMERAL_TYPE + && (coder == ENUMERAL_TYPE || coder == INTEGER_TYPE || coder == REAL_TYPE)) + || (coder == ENUMERAL_TYPE + && (codel == ENUMERAL_TYPE || codel == INTEGER_TYPE || codel == REAL_TYPE))) + { + return convert (type, rhs); + } + /* Conversions among pointers */ + else if (codel == POINTER_TYPE + && (coder == POINTER_TYPE + || (coder == RECORD_TYPE + && (IS_SIGNATURE_POINTER (rhstype) + || IS_SIGNATURE_REFERENCE (rhstype))))) + { + register tree ttl = TREE_TYPE (type); + register tree ttr; + + if (coder == RECORD_TYPE) + { + rhs = build_optr_ref (rhs); + rhstype = TREE_TYPE (rhs); + } + ttr = TREE_TYPE (rhstype); + + /* If both pointers are of aggregate type, then we + can give better error messages, and save some work + as well. */ + if (TREE_CODE (ttl) == RECORD_TYPE && TREE_CODE (ttr) == RECORD_TYPE) + { + tree binfo; + + if (TYPE_MAIN_VARIANT (ttl) == TYPE_MAIN_VARIANT (ttr) + || type == class_star_type_node + || rhstype == class_star_type_node) + binfo = TYPE_BINFO (ttl); + else + binfo = get_binfo (ttl, ttr, 1); + + if (binfo == error_mark_node) + return error_mark_node; + if (binfo == 0) + return error_not_base_type (ttl, ttr); + + if (! TYPE_READONLY (ttl) && TYPE_READONLY (ttr)) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards const", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards const", + errtype, type, rhstype); + } + if (! TYPE_VOLATILE (ttl) && TYPE_VOLATILE (ttr)) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards volatile", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards volatile", + errtype, type, rhstype); + } + } + + /* Any non-function converts to a [const][volatile] void * + and vice versa; otherwise, targets must be the same. + Meanwhile, the lhs target must have all the qualifiers of the rhs. */ + else if (TYPE_MAIN_VARIANT (ttl) == void_type_node + || TYPE_MAIN_VARIANT (ttr) == void_type_node + || comp_target_types (type, rhstype, 1) + || (unsigned_type (TYPE_MAIN_VARIANT (ttl)) + == unsigned_type (TYPE_MAIN_VARIANT (ttr)))) + { + /* ARM $4.8, commentary on p39. */ + if (TYPE_MAIN_VARIANT (ttl) == void_type_node + && TREE_CODE (ttr) == OFFSET_TYPE) + { + error ("no standard conversion from pointer to member to `void *'"); + return error_mark_node; + } + + if (TYPE_MAIN_VARIANT (ttl) != void_type_node + && TYPE_MAIN_VARIANT (ttr) == void_type_node + && rhs != null_pointer_node) + if (coder == RECORD_TYPE) + pedwarn ("implicit conversion of signature pointer to type `%s'", + type_as_string (type, 0)); + else + pedwarn ("ANSI C++ forbids implicit conversion from `void *' in %s", + errtype); + else if (pedantic + && ((TYPE_MAIN_VARIANT (ttl) == void_type_node + && (TREE_CODE (ttr) == FUNCTION_TYPE + || TREE_CODE (ttr) == METHOD_TYPE)) + || + (TYPE_MAIN_VARIANT (ttr) == void_type_node + && (TREE_CODE (ttl) == FUNCTION_TYPE + || TREE_CODE (ttl) == METHOD_TYPE)))) + { + if (fndecl) + cp_pedwarn ("passing `%T' as argument %P of `%D'", + rhstype, parmnum, fndecl); + else + cp_pedwarn ("%s to `void *' from `%T'", errtype, rhstype); + } + /* Const and volatile mean something different for function types, + so the usual warnings are not appropriate. */ + else if ((TREE_CODE (ttr) != FUNCTION_TYPE && TREE_CODE (ttr) != METHOD_TYPE) + || (TREE_CODE (ttl) != FUNCTION_TYPE && TREE_CODE (ttl) != METHOD_TYPE)) + { + if (TREE_CODE (ttl) == OFFSET_TYPE + && binfo_member (TYPE_OFFSET_BASETYPE (ttr), + CLASSTYPE_VBASECLASSES (TYPE_OFFSET_BASETYPE (ttl)))) + { + sorry ("%s between pointer to members converting across virtual baseclasses", errtype); + return error_mark_node; + } + if (! TYPE_READONLY (ttl) && TYPE_READONLY (ttr)) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards const", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards const", + errtype, type, rhstype); + } + if (! TYPE_VOLATILE (ttl) && TYPE_VOLATILE (ttr)) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards volatile", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards volatile", + errtype, type, rhstype); + } + } + } + else if (TREE_CODE (ttr) == OFFSET_TYPE + && TREE_CODE (ttl) != OFFSET_TYPE) + { + /* Normally, pointers to different type codes (other + than void) are not compatible, but we perform + some type instantiation if that resolves the + ambiguity of (X Y::*) and (X *). */ + + if (current_class_decl) + { + if (TREE_CODE (rhs) == INTEGER_CST) + { + rhs = build (PLUS_EXPR, build_pointer_type (TREE_TYPE (ttr)), + current_class_decl, rhs); + return convert_for_assignment (type, rhs, + errtype, fndecl, parmnum); + } + } + if (TREE_CODE (ttl) == METHOD_TYPE) + error ("%s between pointer-to-method and pointer-to-member types", + errtype); + else + error ("%s between pointer and pointer-to-member types", errtype); + return error_mark_node; + } + else + { + int const_parity = TYPE_READONLY (type) ^ TYPE_READONLY (rhstype); + int volatile_parity = TYPE_VOLATILE (type) ^ TYPE_VOLATILE (rhstype); + int unsigned_parity; + int nptrs = 0; + + while (TREE_CODE (ttl) == POINTER_TYPE + && TREE_CODE (ttr) == POINTER_TYPE) + { + nptrs -= 1; + const_parity |= TYPE_READONLY (ttl) ^ TYPE_READONLY (ttr); + volatile_parity |= TYPE_VOLATILE (ttl) ^ TYPE_VOLATILE (ttr); + ttl = TREE_TYPE (ttl); + ttr = TREE_TYPE (ttr); + } + unsigned_parity = TREE_UNSIGNED (ttl) - TREE_UNSIGNED (ttr); + if (unsigned_parity) + if (TREE_UNSIGNED (ttl)) + ttr = unsigned_type (ttr); + else + ttl = unsigned_type (ttl); + + if (comp_target_types (ttl, ttr, nptrs)) + { + if (const_parity) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards const", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards const", + errtype, type, rhstype); + } + if (volatile_parity) + { + if (fndecl) + cp_warning ("passing `%T' as argument %P of `%D' discards volatile", + rhstype, parmnum, fndecl); + else + cp_warning ("%s to `%T' from `%T' discards volatile", + errtype, type, rhstype); + } + if (unsigned_parity > 0) + { + if (fndecl) + cp_pedwarn ("passing `%T' as argument %P of `%D' changes signed to unsigned", + rhstype, parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' changes signed to unsigned", + errtype, type, rhstype); + } + else if (unsigned_parity < 0) + { + if (fndecl) + cp_pedwarn ("passing `%T' as argument %P of `%D' changes unsigned to signed", + rhstype, parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' changes unsigned to signed", + errtype, type, rhstype); + } + + /* C++ is not so friendly about converting function and + member function pointers as C. Emit warnings here. */ + if (TREE_CODE (ttl) == FUNCTION_TYPE + || TREE_CODE (ttl) == METHOD_TYPE) + if (! comptypes (ttl, ttr, 0)) + { + warning ("conflicting function types in %s:", errtype); + cp_warning ("\t`%T' != `%T'", type, rhstype); + } + } + else if (TREE_CODE (TREE_TYPE (rhs)) == METHOD_TYPE) + { + /* When does this happen? */ + my_friendly_abort (119); + /* Conversion of a pointer-to-member type to void *. */ + rhs = build_unary_op (ADDR_EXPR, rhs, 0); + TREE_TYPE (rhs) = type; + return rhs; + } + else if (TREE_CODE (TREE_TYPE (rhs)) == OFFSET_TYPE) + { + /* When does this happen? */ + my_friendly_abort (120); + /* Conversion of a pointer-to-member type to void *. */ + rhs = build_unary_op (ADDR_EXPR, rhs, 0); + TREE_TYPE (rhs) = type; + return rhs; + } + else + { + if (fndecl) + cp_error ("passing `%T' as argument %P of `%D'", + rhstype, parmnum, fndecl); + else + cp_error ("%s to `%T' from `%T'", errtype, type, rhstype); + return error_mark_node; + } + } + return convert (type, rhs); + } + else if (codel == POINTER_TYPE && coder == INTEGER_TYPE) + { + /* An explicit constant 0 can convert to a pointer, + but not a 0 that results from casting or folding. */ + if (! (TREE_CODE (rhs) == INTEGER_CST && integer_zerop (rhs))) + { + if (fndecl) + cp_pedwarn ("passing `%T' to argument %P of `%D' lacks a cast", + rhstype, parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' lacks a cast", + errtype, type, rhstype); + return convert (type, rhs); + } + return null_pointer_node; + } + else if (codel == INTEGER_TYPE + && (coder == POINTER_TYPE + || (coder == RECORD_TYPE + && (IS_SIGNATURE_POINTER (rhstype) + || IS_SIGNATURE_REFERENCE (rhstype))))) + { + if (fndecl) + cp_pedwarn ("passing `%T' to argument %P of `%D' lacks a cast", + rhstype, parmnum, fndecl); + else + cp_pedwarn ("%s to `%T' from `%T' lacks a cast", + errtype, type, rhstype); + return convert (type, rhs); + } + + /* C++ */ + else if (((coder == POINTER_TYPE && TREE_CODE (rhs) == ADDR_EXPR + && TREE_CODE (rhstype) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (rhstype)) == METHOD_TYPE) + || integer_zerop (rhs)) + && TYPE_PTRMEMFUNC_P (type)) + { + /* compatible pointer to member functions. */ + rhs = build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), rhs, 0); + if (rhs == 0) + return error_mark_node; + return digest_init (type, rhs, (tree *)0); + } + else if (codel == ERROR_MARK || coder == ERROR_MARK) + return error_mark_node; + + /* This should no longer happen. References are initialized via + `convert_for_initialization'. They should otherwise be + bashed before coming here. */ + else if (codel == REFERENCE_TYPE) + /* Force an abort. */ + my_friendly_assert (codel != REFERENCE_TYPE, 317); + else if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (TREE_TYPE (rhs))) + return build1 (NOP_EXPR, type, rhs); + else if (TYPE_HAS_CONSTRUCTOR (type) || IS_AGGR_TYPE (TREE_TYPE (rhs))) + return convert (type, rhs); + + cp_error ("%s to `%T' from `%T'", errtype, type, rhstype); + return error_mark_node; +} + +/* Convert RHS to be of type TYPE. If EXP is non-zero, + it is the target of the initialization. + ERRTYPE is a string to use in error messages. + + Two major differences between the behavior of + `convert_for_assignment' and `convert_for_initialization' + are that references are bashed in the former, while + copied in the latter, and aggregates are assigned in + the former (operator=) while initialized in the + latter (X(X&)). + + If using constructor make sure no conversion operator exists, if one does + exist, an ambiguity exists. */ +tree +convert_for_initialization (exp, type, rhs, flags, errtype, fndecl, parmnum) + tree exp, type, rhs; + int flags; + char *errtype; + tree fndecl; + int parmnum; +{ + register enum tree_code codel = TREE_CODE (type); + register tree rhstype; + register enum tree_code coder; + + /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue. + Strip such NOP_EXPRs, since RHS is used in non-lvalue context. */ + if (TREE_CODE (rhs) == NOP_EXPR + && TREE_TYPE (rhs) == TREE_TYPE (TREE_OPERAND (rhs, 0))) + rhs = TREE_OPERAND (rhs, 0); + + if (rhs == error_mark_node + || (TREE_CODE (rhs) == TREE_LIST && TREE_VALUE (rhs) == error_mark_node)) + return error_mark_node; + + if (TREE_CODE (TREE_TYPE (rhs)) == OFFSET_TYPE) + { + rhs = resolve_offset_ref (rhs); + if (rhs == error_mark_node) + return error_mark_node; + rhstype = TREE_TYPE (rhs); + coder = TREE_CODE (rhstype); + } + + if ((TREE_CODE (TREE_TYPE (rhs)) == ARRAY_TYPE + && TREE_CODE (type) != ARRAY_TYPE && TREE_CODE (type) != REFERENCE_TYPE) + || TREE_CODE (TREE_TYPE (rhs)) == FUNCTION_TYPE + || TREE_CODE (TREE_TYPE (rhs)) == METHOD_TYPE) + rhs = default_conversion (rhs); + + rhstype = TREE_TYPE (rhs); + coder = TREE_CODE (rhstype); + + if (coder == UNKNOWN_TYPE) + { + rhs = instantiate_type (type, rhs, 1); + rhstype = TREE_TYPE (rhs); + coder = TREE_CODE (rhstype); + } + + if (coder == ERROR_MARK) + return error_mark_node; + +#if 0 + /* This is *not* the quick way out! It is the way to disaster. */ + if (type == rhstype) + goto converted; +#endif + + /* We accept references to incomplete types, so we can + return here before checking if RHS is of complete type. */ + + if (codel == REFERENCE_TYPE) + return convert_to_reference ((exp ? exp : error_mark_node), + type, rhs, fndecl, parmnum, errtype, + 0, flags); + + rhs = require_complete_type (rhs); + if (rhs == error_mark_node) + return error_mark_node; + + if (exp != 0) exp = require_complete_type (exp); + if (exp == error_mark_node) + return error_mark_node; + + if (TREE_CODE (rhstype) == REFERENCE_TYPE) + rhstype = TREE_TYPE (rhstype); + + if (TYPE_LANG_SPECIFIC (type) + && (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type))) + return build_signature_pointer_constructor (type, rhs); + + if (IS_AGGR_TYPE (type) && TYPE_NEEDS_CONSTRUCTING (type)) + { + if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (rhstype)) + { + /* This is sufficient to perform initialization. No need, + apparently, to go through X(X&) to do first-cut + initialization. Return through a TARGET_EXPR so that we get + cleanups if it is used. */ + if (TREE_CODE (rhs) == CALL_EXPR) + { + rhs = build_cplus_new (type, rhs, 0); + return rhs; + } + /* Handle the case of default parameter initialization and + initialization of static variables. */ + else if (TREE_CODE (rhs) == INDIRECT_REF && TREE_HAS_CONSTRUCTOR (rhs)) + { + my_friendly_assert (TREE_CODE (TREE_OPERAND (rhs, 0)) == CALL_EXPR, 318); + if (exp) + { + my_friendly_assert (TREE_VALUE (TREE_OPERAND (TREE_OPERAND (rhs, 0), 1)) == NULL_TREE, 316); + TREE_VALUE (TREE_OPERAND (TREE_OPERAND (rhs, 0), 1)) + = build_unary_op (ADDR_EXPR, exp, 0); + } + else + rhs = build_cplus_new (type, TREE_OPERAND (rhs, 0), 0); + return rhs; + } + } + if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (rhstype) + || (IS_AGGR_TYPE (rhstype) && UNIQUELY_DERIVED_FROM_P (type, rhstype))) + { + if (TYPE_HAS_INIT_REF (type)) + { + tree init = build_method_call (exp, constructor_name_full (type), + build_tree_list (NULL_TREE, rhs), + NULL_TREE, LOOKUP_NORMAL); + + if (init == error_mark_node) + return error_mark_node; + + if (exp == 0) + { + exp = build_cplus_new (type, init, 0); + return exp; + } + + return build (COMPOUND_EXPR, type, init, exp); + } + + /* ??? The following warnings are turned off because + this is another place where the default X(X&) constructor + is implemented. */ + if (TYPE_HAS_ASSIGNMENT (type)) + cp_warning ("bitwise copy: `%T' defines operator=", type); + + if (TREE_CODE (TREE_TYPE (rhs)) == REFERENCE_TYPE) + rhs = convert_from_reference (rhs); + if (type != rhstype) + return build1 (NOP_EXPR, type, rhs); + return rhs; + } + + return convert (type, rhs); + } + + if (type == TREE_TYPE (rhs)) + { + if (TREE_READONLY_DECL_P (rhs)) + rhs = decl_constant_value (rhs); + return rhs; + } + + return convert_for_assignment (type, rhs, errtype, fndecl, parmnum); +} + +/* Expand an ASM statement with operands, handling output operands + that are not variables or INDIRECT_REFS by transforming such + cases into cases that expand_asm_operands can handle. + + Arguments are same as for expand_asm_operands. + + We don't do default conversions on all inputs, because it can screw + up operands that are expected to be in memory. */ + +void +c_expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line) + tree string, outputs, inputs, clobbers; + int vol; + char *filename; + int line; +{ + int noutputs = list_length (outputs); + register int i; + /* o[I] is the place that output number I should be written. */ + register tree *o = (tree *) alloca (noutputs * sizeof (tree)); + register tree tail; + + /* Record the contents of OUTPUTS before it is modified. */ + for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) + o[i] = TREE_VALUE (tail); + + /* Generate the ASM_OPERANDS insn; + store into the TREE_VALUEs of OUTPUTS some trees for + where the values were actually stored. */ + expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line); + + /* Copy all the intermediate outputs into the specified outputs. */ + for (i = 0, tail = outputs; tail; tail = TREE_CHAIN (tail), i++) + { + if (o[i] != TREE_VALUE (tail)) + { + expand_expr (build_modify_expr (o[i], NOP_EXPR, TREE_VALUE (tail)), + const0_rtx, VOIDmode, 0); + free_temp_slots (); + } + /* Detect modification of read-only values. + (Otherwise done by build_modify_expr.) */ + else + { + tree type = TREE_TYPE (o[i]); + if (TYPE_READONLY (type) + || ((TREE_CODE (type) == RECORD_TYPE + || TREE_CODE (type) == UNION_TYPE) + && C_TYPE_FIELDS_READONLY (type))) + readonly_error (o[i], "modification by `asm'", 1); + } + } + + /* Those MODIFY_EXPRs could do autoincrements. */ + emit_queue (); +} + +/* Expand a C `return' statement. + RETVAL is the expression for what to return, + or a null pointer for `return;' with no value. + + C++: upon seeing a `return', we must call destructors on all + variables in scope which had constructors called on them. + This means that if in a destructor, the base class destructors + must be called before returning. + + The RETURN statement in C++ has initialization semantics. */ + +void +c_expand_return (retval) + tree retval; +{ + extern struct nesting *cond_stack, *loop_stack, *case_stack; + extern tree dtor_label, ctor_label; + tree result = DECL_RESULT (current_function_decl); + tree valtype = TREE_TYPE (result); + register int use_temp = 0; + int returns_value = 1; + + if (TREE_THIS_VOLATILE (current_function_decl)) + warning ("function declared `noreturn' has a `return' statement"); + + if (retval == error_mark_node) + { + current_function_returns_null = 1; + return; + } + + if (retval == NULL_TREE) + { + /* A non-named return value does not count. */ + + /* Can't just return from a destructor. */ + if (dtor_label) + { + expand_goto (dtor_label); + return; + } + + if (DECL_CONSTRUCTOR_P (current_function_decl)) + retval = current_class_decl; + else if (DECL_NAME (result) != NULL_TREE + && TREE_CODE (valtype) != VOID_TYPE) + retval = result; + else + { + current_function_returns_null = 1; + + if (valtype != NULL_TREE && TREE_CODE (valtype) != VOID_TYPE) + { + if (DECL_NAME (DECL_RESULT (current_function_decl)) == NULL_TREE) + { + pedwarn ("`return' with no value, in function returning non-void"); + /* Clear this, so finish_function won't say that we + reach the end of a non-void function (which we don't, + we gave a return!). */ + current_function_returns_null = 0; + } + } + + expand_null_return (); + return; + } + } + else if (DECL_CONSTRUCTOR_P (current_function_decl) + && retval != current_class_decl) + { + error ("return from a constructor: use `this = ...' instead"); + retval = current_class_decl; + } + + if (valtype == NULL_TREE || TREE_CODE (valtype) == VOID_TYPE) + { + current_function_returns_null = 1; + /* We do this here so we'll avoid a warning about how the function + "may or may not return a value" in finish_function. */ + returns_value = 0; + + if (TREE_CODE (TREE_TYPE (retval)) != VOID_TYPE) + pedwarn ("`return' with a value, in function returning void"); + expand_return (retval); + } + /* Add some useful error checking for C++. */ + else if (TREE_CODE (valtype) == REFERENCE_TYPE) + { + tree whats_returned; + tree tmp_result = result; + + /* Don't initialize directly into a non-BLKmode retval, since that + could lose when being inlined by another caller. (GCC can't + read the function return register in an inline function when + the return value is being ignored). */ + if (result && TYPE_MODE (TREE_TYPE (tmp_result)) != BLKmode) + tmp_result = 0; + + /* convert to reference now, so we can give error if we + return an reference to a non-lvalue. */ + retval = convert_for_initialization (tmp_result, valtype, retval, + LOOKUP_NORMAL, "return", + NULL_TREE, 0); + + /* Sort through common things to see what it is + we are returning. */ + whats_returned = retval; + if (TREE_CODE (whats_returned) == COMPOUND_EXPR) + { + whats_returned = TREE_OPERAND (whats_returned, 1); + if (TREE_CODE (whats_returned) == ADDR_EXPR) + whats_returned = TREE_OPERAND (whats_returned, 0); + } + if (TREE_CODE (whats_returned) == ADDR_EXPR) + { + whats_returned = TREE_OPERAND (whats_returned, 0); + while (TREE_CODE (whats_returned) == NEW_EXPR + || TREE_CODE (whats_returned) == TARGET_EXPR + || TREE_CODE (whats_returned) == WITH_CLEANUP_EXPR) + /* Get the target. */ + whats_returned = TREE_OPERAND (whats_returned, 0); + } + + if (TREE_CODE (whats_returned) == VAR_DECL && DECL_NAME (whats_returned)) + { + if (TEMP_NAME_P (DECL_NAME (whats_returned))) + warning ("reference to non-lvalue returned"); + else if (! TREE_STATIC (whats_returned) + && IDENTIFIER_LOCAL_VALUE (DECL_NAME (whats_returned))) + cp_warning_at ("reference to local variable `%D' returned", whats_returned); + } + } + else if (TREE_CODE (retval) == ADDR_EXPR) + { + tree whats_returned = TREE_OPERAND (retval, 0); + + if (TREE_CODE (whats_returned) == TREE_LIST) + whats_returned = TREE_VALUE (whats_returned); + + if (DECL_NAME (whats_returned) + && IDENTIFIER_LOCAL_VALUE (DECL_NAME (whats_returned)) + && !TREE_STATIC (whats_returned)) + cp_warning_at ("address of local variable `%D' returned", whats_returned); + } + + /* Now deal with possible C++ hair: + (1) Compute the return value. + (2) If there are aggregate values with destructors which + must be cleaned up, clean them (taking care + not to clobber the return value). + (3) If an X(X&) constructor is defined, the return + value must be returned via that. */ + + if (retval == result + /* Watch out for constructors, which "return" aggregates + via initialization, but which otherwise "return" a pointer. */ + || DECL_CONSTRUCTOR_P (current_function_decl)) + { + /* This is just an error--it's already been reported. */ + if (TYPE_SIZE (valtype) == NULL_TREE) + return; + + if (TYPE_MODE (valtype) != BLKmode + && any_pending_cleanups (1)) + { + retval = get_temp_regvar (valtype, retval); + use_temp = obey_regdecls; + } + } + else if (IS_AGGR_TYPE (valtype) && TYPE_NEEDS_CONSTRUCTING (valtype)) + { + /* Throw away the cleanup that `build_functional_cast' gave us. */ + if (TREE_CODE (retval) == WITH_CLEANUP_EXPR + && TREE_CODE (TREE_OPERAND (retval, 0)) == TARGET_EXPR) + retval = TREE_OPERAND (retval, 0); + expand_aggr_init (result, retval, 0); + DECL_INITIAL (result) = NULL_TREE; + retval = 0; + } + else + { + if (TYPE_MODE (valtype) == VOIDmode) + { + if (TYPE_MODE (TREE_TYPE (result)) != VOIDmode + && warn_return_type) + warning ("return of void value in function returning non-void"); + expand_expr_stmt (retval); + retval = 0; + result = 0; + } + else if (TYPE_MODE (valtype) != BLKmode + && any_pending_cleanups (1)) + { + retval = get_temp_regvar (valtype, retval); + use_temp = obey_regdecls; + result = 0; + } + else + { + retval = convert_for_initialization (result, valtype, retval, + LOOKUP_NORMAL, + "return", NULL_TREE, 0); + DECL_INITIAL (result) = NULL_TREE; + } + if (retval == error_mark_node) + return; + } + + emit_queue (); + + if (retval != NULL_TREE + && TREE_CODE_CLASS (TREE_CODE (retval)) == 'd' + && cond_stack == 0 && loop_stack == 0 && case_stack == 0) + current_function_return_value = retval; + + if (result) + { + /* Everything's great--RETVAL is in RESULT. */ + if (original_result_rtx) + store_expr (result, original_result_rtx, 0); + else if (retval && retval != result) + { + /* Clear this out so the later call to decl_function_context + won't end up bombing on us. */ + if (DECL_CONTEXT (result) == error_mark_node) + DECL_CONTEXT (result) = NULL_TREE; + /* Here is where we finally get RETVAL into RESULT. + `expand_return' does the magic of protecting + RESULT from cleanups. */ + retval = build (INIT_EXPR, TREE_TYPE (result), result, retval); + TREE_SIDE_EFFECTS (retval) = 1; + expand_return (retval); + } + else + expand_return (result); + + use_variable (DECL_RTL (result)); + if (ctor_label && TREE_CODE (ctor_label) != ERROR_MARK) + expand_goto (ctor_label); + else + expand_null_return (); + } + else + { + /* We may still need to put RETVAL into RESULT. */ + result = DECL_RESULT (current_function_decl); + if (original_result_rtx) + { + /* Here we have a named return value that went + into memory. We can compute RETVAL into that. */ + if (retval) + expand_assignment (result, retval, 0, 0); + else + store_expr (result, original_result_rtx, 0); + result = make_tree (TREE_TYPE (result), original_result_rtx); + } + else if (ctor_label && TREE_CODE (ctor_label) != ERROR_MARK) + { + /* Here RETVAL is CURRENT_CLASS_DECL, so there's nothing to do. */ + expand_goto (ctor_label); + } + else if (retval) + { + /* Here is where we finally get RETVAL into RESULT. + `expand_return' does the magic of protecting + RESULT from cleanups. */ + result = build (INIT_EXPR, TREE_TYPE (result), result, retval); + TREE_SIDE_EFFECTS (result) = 1; + expand_return (result); + } + else if (TYPE_MODE (TREE_TYPE (result)) != VOIDmode) + expand_return (result); + } + + current_function_returns_value = returns_value; + if (original_result_rtx) + use_variable (original_result_rtx); + if (use_temp) + use_variable (DECL_RTL (DECL_RESULT (current_function_decl))); + + /* One way to clear out cleanups that EXPR might + generate. Note that this code will really be + dead code, but that is ok--cleanups that were + needed were handled by the magic of `return'. */ + expand_cleanups_to (NULL_TREE); +} + +/* Start a C switch statement, testing expression EXP. + Return EXP if it is valid, an error node otherwise. */ + +tree +c_expand_start_case (exp) + tree exp; +{ + tree type; + register enum tree_code code; + + /* Convert from references, etc. */ + exp = default_conversion (exp); + type = TREE_TYPE (exp); + code = TREE_CODE (type); + + if (IS_AGGR_TYPE_CODE (code)) + exp = build_type_conversion (CONVERT_EXPR, integer_type_node, exp, 1); + + if (exp == NULL_TREE) + { + error ("switch quantity not an integer"); + exp = error_mark_node; + } + type = TREE_TYPE (exp); + code = TREE_CODE (type); + + if (code != INTEGER_TYPE && code != ENUMERAL_TYPE && code != ERROR_MARK) + { + error ("switch quantity not an integer"); + exp = error_mark_node; + } + else + { + tree index; + + exp = default_conversion (exp); + type = TREE_TYPE (exp); + index = get_unwidened (exp, 0); + /* We can't strip a conversion from a signed type to an unsigned, + because if we did, int_fits_type_p would do the wrong thing + when checking case values for being in range, + and it's too hard to do the right thing. */ + if (TREE_UNSIGNED (TREE_TYPE (exp)) + == TREE_UNSIGNED (TREE_TYPE (index))) + exp = index; + } + + expand_start_case (1, exp, type, "switch statement"); + + return exp; +} diff --git a/gcc/cp/typeck2.c b/gcc/cp/typeck2.c new file mode 100644 index 0000000..8106e58 --- /dev/null +++ b/gcc/cp/typeck2.c @@ -0,0 +1,1827 @@ +/* Report error messages, build initializers, and perform + some front-end optimizations for C++ compiler. + Copyright (C) '87, '88, '89, '92, 1993, 1994 Free Software Foundation, Inc. + Hacked by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +/* This file is part of the C++ front end. + It contains routines to build C++ expressions given their operands, + including computing the types of the result, C and C++ specific error + checks, and some optimization. + + There are also routines to build RETURN_STMT nodes and CASE_STMT nodes, + and to process initializations in declarations (since they work + like a strange sort of assignment). */ + +#include "config.h" +#include <stdio.h> +#include "tree.h" +#include "cp-tree.h" +#include "flags.h" + +static tree process_init_constructor (); +extern void pedwarn (), error (); + +extern int errorcount; +extern int sorrycount; + +/* Print an error message stemming from an attempt to use + BASETYPE as a base class for TYPE. */ +tree +error_not_base_type (basetype, type) + tree basetype, type; +{ + if (TREE_CODE (basetype) == FUNCTION_DECL) + basetype = DECL_CLASS_CONTEXT (basetype); + cp_error ("type `%T' is not a base type for type `%T'", basetype, type); + return error_mark_node; +} + +tree +binfo_or_else (parent_or_type, type) + tree parent_or_type, type; +{ + tree binfo; + if (TYPE_MAIN_VARIANT (parent_or_type) == TYPE_MAIN_VARIANT (type)) + return parent_or_type; + if (binfo = get_binfo (parent_or_type, TYPE_MAIN_VARIANT (type), 0)) + { + if (binfo == error_mark_node) + return NULL_TREE; + return binfo; + } + error_not_base_type (parent_or_type, type); + return NULL_TREE; +} + +/* Print an error message stemming from an invalid use of an + aggregate type. + + TYPE is the type or binfo which draws the error. + MSG is the message to print. + ARG is an optional argument which may provide more information. */ +void +error_with_aggr_type (type, msg, arg) + tree type; + char *msg; + HOST_WIDE_INT arg; +{ + tree name; + + if (TREE_CODE (type) == TREE_VEC) + type = BINFO_TYPE (type); + + name = TYPE_NAME (type); + if (TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + error (msg, IDENTIFIER_POINTER (name), arg); +} + +/* According to ARM $7.1.6, "A `const' object may be initialized, but its + value may not be changed thereafter. Thus, we emit hard errors for these, + rather than just pedwarns. If `SOFT' is 1, then we just pedwarn. (For + example, conversions to references.) */ +void +readonly_error (arg, string, soft) + tree arg; + char *string; + int soft; +{ + char *fmt; + void (*fn)(); + + if (soft) + fn = pedwarn; + else + fn = error; + + if (TREE_CODE (arg) == COMPONENT_REF) + { + if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0)))) + fmt = "%s of member `%s' in read-only structure"; + else + fmt = "%s of read-only member `%s'"; + (*fn) (fmt, string, lang_printable_name (TREE_OPERAND (arg, 1))); + } + else if (TREE_CODE (arg) == VAR_DECL) + { + if (DECL_LANG_SPECIFIC (arg) + && DECL_IN_AGGR_P (arg) + && !TREE_STATIC (arg)) + fmt = "%s of constant field `%s'"; + else + fmt = "%s of read-only variable `%s'"; + (*fn) (fmt, string, lang_printable_name (arg)); + } + else if (TREE_CODE (arg) == PARM_DECL) + (*fn) ("%s of read-only parameter `%s'", string, + lang_printable_name (arg)); + else if (TREE_CODE (arg) == INDIRECT_REF + && TREE_CODE (TREE_TYPE (TREE_OPERAND (arg, 0))) == REFERENCE_TYPE + && (TREE_CODE (TREE_OPERAND (arg, 0)) == VAR_DECL + || TREE_CODE (TREE_OPERAND (arg, 0)) == PARM_DECL)) + (*fn) ("%s of read-only reference `%s'", + string, lang_printable_name (TREE_OPERAND (arg, 0))); + else if (TREE_CODE (arg) == RESULT_DECL) + (*fn) ("%s of read-only named return value `%s'", + string, lang_printable_name (arg)); + else + (*fn) ("%s of read-only location", string); +} + +/* Print an error message for invalid use of a type which declares + virtual functions which are not inheritable. */ +void +abstract_virtuals_error (decl, type) + tree decl; + tree type; +{ + tree u = CLASSTYPE_ABSTRACT_VIRTUALS (type); + + if (decl) + { + if (TREE_CODE (decl) == RESULT_DECL) + return; + + if (TREE_CODE (decl) == VAR_DECL) + cp_error ("cannot declare variable `%D' to be of type `%T'", + decl, type); + else if (TREE_CODE (decl) == PARM_DECL) + cp_error ("cannot declare parameter `%D' to be of type `%T'", + decl, type); + else if (TREE_CODE (decl) == FIELD_DECL) + cp_error ("cannot declare field `%D' to be of type `%T'", + decl, type); + else if (TREE_CODE (decl) == FUNCTION_DECL + && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE) + cp_error ("invalid return type for method `%#D'", decl); + else if (TREE_CODE (decl) == FUNCTION_DECL) + cp_error ("invalid return type for function `%#D'", decl); + } + else cp_error ("cannot allocate an object of type `%T'", type); + /* Only go through this once. */ + if (TREE_PURPOSE (u) == NULL_TREE) + { + error (" since the following virtual functions are abstract:"); + TREE_PURPOSE (u) = error_mark_node; + while (u) + { + cp_error ("\t%#D", TREE_VALUE (u)); + u = TREE_CHAIN (u); + } + } + else cp_error (" since type `%T' has abstract virtual functions", type); +} + +/* Print an error message for invalid use of a signature type. + Signatures are treated similar to abstract classes here, they + cannot be instantiated. */ +void +signature_error (decl, type) + tree decl; + tree type; +{ + if (decl) + { + if (TREE_CODE (decl) == RESULT_DECL) + return; + + if (TREE_CODE (decl) == VAR_DECL) + cp_error ("cannot declare variable `%D' to be of signature type `%T'", + decl, type); + else if (TREE_CODE (decl) == PARM_DECL) + cp_error ("cannot declare parameter `%D' to be of signature type `%T'", + decl, type); + else if (TREE_CODE (decl) == FIELD_DECL) + cp_error ("cannot declare field `%D' to be of signature type `%T'", + decl, type); + else if (TREE_CODE (decl) == FUNCTION_DECL + && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE) + cp_error ("invalid return type for method `%#D'", decl); + else if (TREE_CODE (decl) == FUNCTION_DECL) + cp_error ("invalid return type for function `%#D'", decl); + } + else + error ("cannot allocate an object of signature type `%T'", type); +} + +/* Print an error message for invalid use of an incomplete type. + VALUE is the expression that was used (or 0 if that isn't known) + and TYPE is the type that was invalid. */ + +void +incomplete_type_error (value, type) + tree value; + tree type; +{ + char *errmsg; + + /* Avoid duplicate error message. */ + if (TREE_CODE (type) == ERROR_MARK) + return; + + if (value != 0 && (TREE_CODE (value) == VAR_DECL + || TREE_CODE (value) == PARM_DECL)) + error ("`%s' has an incomplete type", + IDENTIFIER_POINTER (DECL_NAME (value))); + else + { + retry: + /* We must print an error message. Be clever about what it says. */ + + switch (TREE_CODE (type)) + { + case RECORD_TYPE: + errmsg = "invalid use of undefined type `struct %s'"; + break; + + case UNION_TYPE: + errmsg = "invalid use of undefined type `union %s'"; + break; + + case ENUMERAL_TYPE: + errmsg = "invalid use of undefined type `enum %s'"; + break; + + case VOID_TYPE: + error ("invalid use of void expression"); + return; + + case ARRAY_TYPE: + if (TYPE_DOMAIN (type)) + { + type = TREE_TYPE (type); + goto retry; + } + error ("invalid use of array with unspecified bounds"); + return; + + case OFFSET_TYPE: + error ("invalid use of member type (did you forget the `&' ?)"); + return; + + default: + my_friendly_abort (108); + } + + error_with_aggr_type (type, errmsg); + } +} + +/* Like error(), but don't call report_error_function(). */ +static void +ack (s, v, v2) + char *s; + HOST_WIDE_INT v; + HOST_WIDE_INT v2; +{ + extern char * progname; + + if (input_filename) + fprintf (stderr, "%s:%d: ", input_filename, lineno); + else + fprintf (stderr, "%s: ", progname); + + fprintf (stderr, s, v, v2); + fprintf (stderr, "\n"); +} + +/* There are times when the compiler can get very confused, confused + to the point of giving up by aborting, simply because of previous + input errors. It is much better to have the user go back and + correct those errors first, and see if it makes us happier, than it + is to abort on him. This is because when one has a 10,000 line + program, and the compiler comes back with ``core dump'', the user + is left not knowing even where to begin to fix things and no place + to even try and work around things. + + The parameter is to uniquely identify the problem to the user, so + that they can say, I am having problem 59, and know that fix 7 will + probably solve their problem. Or, we can document what problem + 59 is, so they can understand how to work around it, should they + ever run into it. + + Note, there will be no more calls in the C++ front end to abort, + because the C++ front end is so unreliable still. The C front end + can get away with calling abort, because for most of the calls to + abort on most machines, it, I suspect, can be proven that it is + impossible to ever call abort. The same is not yet true for C++, + one day, maybe it will be. + + We used to tell people to "fix the above error[s] and try recompiling + the program" via a call to fatal, but that message tended to look + silly. So instead, we just do the equivalent of a call to fatal in the + same situation (call exit). */ + +/* First used: 0 (reserved), Last used: 355. Free: 5. */ + +static int abortcount = 0; + +void +my_friendly_abort (i) + int i; +{ + /* if the previous error came through here, i.e. report_error_function + ended up calling us again, don't just exit; we want a diagnostic of + some kind. */ + if (abortcount == 1) + current_function_decl = NULL_TREE; + else if (errorcount > 0 || sorrycount > 0) + { + if (abortcount > 1) + { + if (i == 0) + ack ("Internal compiler error."); + else + ack ("Internal compiler error %d.", i); + ack ("Please submit a full bug report to `bug-g++@prep.ai.mit.edu'."); + } + else + error ("confused by earlier errors, bailing out"); + + exit (34); + } + ++abortcount; + + if (i == 0) + error ("Internal compiler error."); + else + error ("Internal compiler error %d.", i); + + fatal ("Please submit a full bug report to `bug-g++@prep.ai.mit.edu'."); +} + +void +my_friendly_assert (cond, where) + int cond, where; +{ + if (cond == 0) + my_friendly_abort (where); +} + +/* Return nonzero if VALUE is a valid constant-valued expression + for use in initializing a static variable; one that can be an + element of a "constant" initializer. + + Return 1 if the value is absolute; return 2 if it is relocatable. + We assume that VALUE has been folded as much as possible; + therefore, we do not need to check for such things as + arithmetic-combinations of integers. */ + +static int +initializer_constant_valid_p (value) + tree value; +{ + switch (TREE_CODE (value)) + { + case CONSTRUCTOR: + return TREE_STATIC (value); + + case INTEGER_CST: + case REAL_CST: + case STRING_CST: + return 1; + + case ADDR_EXPR: + return 2; + + case CONVERT_EXPR: + case NOP_EXPR: + /* Allow conversions between types of the same kind. */ + if (TREE_CODE (TREE_TYPE (value)) + == TREE_CODE (TREE_TYPE (TREE_OPERAND (value, 0)))) + return initializer_constant_valid_p (TREE_OPERAND (value, 0)); + /* Allow (int) &foo provided int is as wide as a pointer. */ + if (TREE_CODE (TREE_TYPE (value)) == INTEGER_TYPE + && TREE_CODE (TREE_TYPE (TREE_OPERAND (value, 0))) == POINTER_TYPE + && ! tree_int_cst_lt (TYPE_SIZE (TREE_TYPE (value)), + TYPE_SIZE (TREE_TYPE (TREE_OPERAND (value, 0))))) + return initializer_constant_valid_p (TREE_OPERAND (value, 0)); + return 0; + + case PLUS_EXPR: + { + int valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0)); + int valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1)); + if (valid0 == 1 && valid1 == 2) + return 2; + if (valid0 == 2 && valid1 == 1) + return 2; + return 0; + } + + case MINUS_EXPR: + { + int valid0 = initializer_constant_valid_p (TREE_OPERAND (value, 0)); + int valid1 = initializer_constant_valid_p (TREE_OPERAND (value, 1)); + if (valid0 == 2 && valid1 == 1) + return 2; + return 0; + } + } + + return 0; +} + +/* Perform appropriate conversions on the initial value of a variable, + store it in the declaration DECL, + and print any error messages that are appropriate. + If the init is invalid, store an ERROR_MARK. + + C++: Note that INIT might be a TREE_LIST, which would mean that it is + a base class initializer for some aggregate type, hopefully compatible + with DECL. If INIT is a single element, and DECL is an aggregate + type, we silently convert INIT into a TREE_LIST, allowing a constructor + to be called. + + If INIT is a TREE_LIST and there is no constructor, turn INIT + into a CONSTRUCTOR and use standard initialization techniques. + Perhaps a warning should be generated? + + Returns value of initializer if initialization could not be + performed for static variable. In that case, caller must do + the storing. */ + +tree +store_init_value (decl, init) + tree decl, init; +{ + register tree value, type; + + /* If variable's type was invalidly declared, just ignore it. */ + + type = TREE_TYPE (decl); + if (TREE_CODE (type) == ERROR_MARK) + return NULL_TREE; + + /* Take care of C++ business up here. */ + type = TYPE_MAIN_VARIANT (type); + + /* implicitly tests if IS_AGGR_TYPE. */ + if (TYPE_NEEDS_CONSTRUCTING (type) && TREE_CODE (init) != CONSTRUCTOR) + my_friendly_abort (109); + else if (IS_AGGR_TYPE (type)) + { + /* Although we are not allowed to declare variables of signature + type, we complain about a possible constructor call in such a + declaration as well. */ + if (TREE_CODE (init) == TREE_LIST + && IS_SIGNATURE (type)) + { + cp_error ("constructor syntax cannot be used with signature type `%T'", + type); + init = error_mark_node; + } + else if (TREE_CODE (init) == TREE_LIST) + { + cp_error ("constructor syntax used, but no constructor declared for type `%T'", type); + init = build_nt (CONSTRUCTOR, NULL_TREE, nreverse (init)); + } +#if 0 + if (TREE_CODE (init) == CONSTRUCTOR) + { + tree field; + tree funcs; + int func; + + /* Check that we're really an aggregate as ARM 8.4.1 defines it. */ + if (CLASSTYPE_N_BASECLASSES (type)) + cp_error_at ("initializer list construction illegal for derived class object `%D'", decl); + if (CLASSTYPE_VTBL_PTR (type)) + cp_error_at ("initializer list construction illegal for polymorphic class object `%D'", decl); + if (TYPE_NEEDS_CONSTRUCTING (type)) + { + cp_error_at ("initializer list construction illegal for `%D'", decl); + error ("due to the presence of a constructor"); + } + for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field)) + if (TREE_PRIVATE (field) || TREE_PROTECTED (field)) + { + cp_error_at ("initializer list construction illegal for `%D'", decl); + cp_error_at ("due to non-public access of member `%D'", field); + } + funcs = TYPE_METHODS (type); + if (funcs) + for (func = 0; func < TREE_VEC_LENGTH (funcs); func++) + { + field = TREE_VEC_ELT (funcs, func); + if (field && (TREE_PRIVATE (field) || TREE_PROTECTED (field))) + { + cp_error_at ("initializer list construction illegal for `%D'", decl); + cp_error_at ("due to non-public access of member `%D'", field); + } + } + } +#endif + } + else if (TREE_CODE (init) == TREE_LIST + && TREE_TYPE (init) != unknown_type_node) + { + if (TREE_CODE (decl) == RESULT_DECL) + { + if (TREE_CHAIN (init)) + { + warning ("comma expression used to initialize return value"); + init = build_compound_expr (init); + } + else + init = TREE_VALUE (init); + } + else if (TREE_TYPE (init) != 0 + && TREE_CODE (TREE_TYPE (init)) == OFFSET_TYPE) + { + /* Use the type of our variable to instantiate + the type of our initializer. */ + init = instantiate_type (type, init, 1); + } + else if (TREE_CODE (init) == TREE_LIST + && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) + { + error ("cannot initialize arrays using this syntax"); + return NULL_TREE; + } + else + { + /* We get here with code like `int a (2);' */ + + if (TREE_CHAIN (init) != NULL_TREE) + { + pedwarn ("initializer list being treated as compound expression"); + init = build_compound_expr (init); + } + else + init = TREE_VALUE (init); + } + } + + /* End of special C++ code. */ + + /* Digest the specified initializer into an expression. */ + + value = digest_init (type, init, (tree *) 0); + + /* Store the expression if valid; else report error. */ + + if (TREE_CODE (value) == ERROR_MARK) + ; + else if (TREE_STATIC (decl) + && (! TREE_CONSTANT (value) + || ! initializer_constant_valid_p (value) + /* Since ctors and dtors are the only things that can + reference vtables, and they are always written down + the the vtable definition, we can leave the + vtables in initialized data space. + However, other initialized data cannot be initialized + this way. Instead a global file-level initializer + must do the job. */ + || (flag_pic && !DECL_VIRTUAL_P (decl) && TREE_PUBLIC (decl)))) + return value; + else + { + if (pedantic && TREE_CODE (value) == CONSTRUCTOR) + { + if (! TREE_CONSTANT (value) || ! TREE_STATIC (value)) + pedwarn ("ANSI C++ forbids non-constant aggregate initializer expressions"); + } + } + DECL_INITIAL (decl) = value; + return NULL_TREE; +} + +/* Digest the parser output INIT as an initializer for type TYPE. + Return a C expression of type TYPE to represent the initial value. + + If TAIL is nonzero, it points to a variable holding a list of elements + of which INIT is the first. We update the list stored there by + removing from the head all the elements that we use. + Normally this is only one; we use more than one element only if + TYPE is an aggregate and INIT is not a constructor. */ + +tree +digest_init (type, init, tail) + tree type, init, *tail; +{ + enum tree_code code = TREE_CODE (type); + tree element = 0; + tree old_tail_contents; + /* Nonzero if INIT is a braced grouping, which comes in as a CONSTRUCTOR + tree node which has no TREE_TYPE. */ + int raw_constructor; + + /* By default, assume we use one element from a list. + We correct this later in the sole case where it is not true. */ + + if (tail) + { + old_tail_contents = *tail; + *tail = TREE_CHAIN (*tail); + } + + if (init == error_mark_node || (TREE_CODE (init) == TREE_LIST + && TREE_VALUE (init) == error_mark_node)) + return error_mark_node; + + /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */ + if (TREE_CODE (init) == NON_LVALUE_EXPR) + init = TREE_OPERAND (init, 0); + + if (init && TYPE_PTRMEMFUNC_P (type) + && ((TREE_CODE (init) == ADDR_EXPR + && TREE_CODE (TREE_TYPE (init)) == POINTER_TYPE + && TREE_CODE (TREE_TYPE (TREE_TYPE (init))) == METHOD_TYPE) + || integer_zerop (init))) + { + init = build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), init, 0); + } + + raw_constructor = TREE_CODE (init) == CONSTRUCTOR && TREE_TYPE (init) == 0; + + if (init && raw_constructor + && CONSTRUCTOR_ELTS (init) != 0 + && TREE_CHAIN (CONSTRUCTOR_ELTS (init)) == 0) + { + element = TREE_VALUE (CONSTRUCTOR_ELTS (init)); + /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */ + if (element && TREE_CODE (element) == NON_LVALUE_EXPR) + element = TREE_OPERAND (element, 0); + if (element == error_mark_node) + return element; + } + + /* Any type can be initialized from an expression of the same type, + optionally with braces. */ + + if (init && TREE_TYPE (init) + && (TYPE_MAIN_VARIANT (TREE_TYPE (init)) == type + || (code == ARRAY_TYPE && comptypes (TREE_TYPE (init), type, 1)))) + { + if (pedantic && code == ARRAY_TYPE + && TREE_CODE (init) != STRING_CST) + pedwarn ("ANSI C++ forbids initializing array from array expression"); + if (TREE_CODE (init) == CONST_DECL) + init = DECL_INITIAL (init); + else if (TREE_READONLY_DECL_P (init)) + init = decl_constant_value (init); + return init; + } + + if (element && (TREE_TYPE (element) == type + || (code == ARRAY_TYPE && TREE_TYPE (element) + && comptypes (TREE_TYPE (element), type, 1)))) + { + if (pedantic && code == ARRAY_TYPE) + pedwarn ("ANSI C++ forbids initializing array from array expression"); + if (pedantic && (code == RECORD_TYPE || code == UNION_TYPE)) + pedwarn ("ANSI C++ forbids single nonscalar initializer with braces"); + if (TREE_CODE (element) == CONST_DECL) + element = DECL_INITIAL (element); + else if (TREE_READONLY_DECL_P (element)) + element = decl_constant_value (element); + return element; + } + + /* Check for initializing a union by its first field. + Such an initializer must use braces. */ + + if (code == UNION_TYPE) + { + tree result, field = TYPE_FIELDS (type); + + /* Find the first named field. ANSI decided in September 1990 + that only named fields count here. */ + while (field && DECL_NAME (field) == 0) + field = TREE_CHAIN (field); + + if (field == 0) + { + error ("union with no named members cannot be initialized"); + return error_mark_node; + } + + if (raw_constructor && !TYPE_NEEDS_CONSTRUCTING (type)) + { + result = process_init_constructor (type, init, NULL_PTR); + return result; + } + + if (! raw_constructor) + { + error ("type mismatch in initialization"); + return error_mark_node; + } + if (element == 0) + { + if (!TYPE_NEEDS_CONSTRUCTING (type)) + { + error ("union initializer requires one element"); + return error_mark_node; + } + } + else + { + /* Take just the first element from within the constructor + and it should match the type of the first element. */ + element = digest_init (TREE_TYPE (field), element, (tree *) 0); + result = build (CONSTRUCTOR, type, 0, build_tree_list (field, element)); + TREE_CONSTANT (result) = TREE_CONSTANT (element); + TREE_STATIC (result) = (initializer_constant_valid_p (element) + && TREE_CONSTANT (element)); + return result; + } + } + + /* Initialization of an array of chars from a string constant + optionally enclosed in braces. */ + + if (code == ARRAY_TYPE) + { + tree typ1 = TYPE_MAIN_VARIANT (TREE_TYPE (type)); + if ((typ1 == char_type_node + || typ1 == signed_char_type_node + || typ1 == unsigned_char_type_node + || typ1 == unsigned_wchar_type_node + || typ1 == signed_wchar_type_node) + && ((init && TREE_CODE (init) == STRING_CST) + || (element && TREE_CODE (element) == STRING_CST))) + { + tree string = element ? element : init; + + if ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (string))) + != char_type_node) + && TYPE_PRECISION (typ1) == BITS_PER_UNIT) + { + error ("char-array initialized from wide string"); + return error_mark_node; + } + if ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (string))) + == char_type_node) + && TYPE_PRECISION (typ1) != BITS_PER_UNIT) + { + error ("int-array initialized from non-wide string"); + return error_mark_node; + } + + if (pedantic && typ1 != char_type_node) + pedwarn ("ANSI C++ forbids string initializer except for `char' elements"); + TREE_TYPE (string) = type; + if (TYPE_DOMAIN (type) != 0 + && TREE_CONSTANT (TYPE_SIZE (type))) + { + register int size + = TREE_INT_CST_LOW (TYPE_SIZE (type)); + size = (size + BITS_PER_UNIT - 1) / BITS_PER_UNIT; + /* In C it is ok to subtract 1 from the length of the string + because it's ok to ignore the terminating null char that is + counted in the length of the constant, but in C++ this would + be invalid. */ + if (size < TREE_STRING_LENGTH (string)) + warning ("initializer-string for array of chars is too long"); + } + return string; + } + } + + /* Handle scalar types, including conversions, + and signature pointers and references. */ + + if (code == INTEGER_TYPE || code == REAL_TYPE || code == POINTER_TYPE + || code == ENUMERAL_TYPE || code == REFERENCE_TYPE + || (code == RECORD_TYPE && ! raw_constructor + && (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type)))) + { + if (raw_constructor) + { + if (element == 0) + { + error ("initializer for scalar variable requires one element"); + return error_mark_node; + } + init = element; + } + + return convert_for_initialization (0, type, init, LOOKUP_NORMAL, + "initialization", NULL_TREE, 0); + } + + /* Come here only for records and arrays (and unions with constructors). */ + + if (TYPE_SIZE (type) && ! TREE_CONSTANT (TYPE_SIZE (type))) + { + error ("variable-sized object may not be initialized"); + return error_mark_node; + } + + if (code == ARRAY_TYPE || code == RECORD_TYPE || code == UNION_TYPE) + { + if (raw_constructor) + return process_init_constructor (type, init, (tree *)0); + else if (TYPE_NEEDS_CONSTRUCTING (type)) + { + /* This can only be reached when caller is initializing + ARRAY_TYPE. In that case, we don't want to convert + INIT to TYPE. We will let `expand_vec_init' do it. */ + return init; + } + else if (tail != 0) + { + *tail = old_tail_contents; + return process_init_constructor (type, 0, tail); + } + else if (flag_traditional) + /* Traditionally one can say `char x[100] = 0;'. */ + return process_init_constructor (type, + build_nt (CONSTRUCTOR, 0, + tree_cons (0, init, 0)), + 0); + if (code != ARRAY_TYPE) + return convert_for_initialization (0, type, init, LOOKUP_NORMAL, + "initialization", NULL_TREE, 0); + } + + error ("invalid initializer"); + return error_mark_node; +} + +/* Process a constructor for a variable of type TYPE. + The constructor elements may be specified either with INIT or with ELTS, + only one of which should be non-null. + + If INIT is specified, it is a CONSTRUCTOR node which is specifically + and solely for initializing this datum. + + If ELTS is specified, it is the address of a variable containing + a list of expressions. We take as many elements as we need + from the head of the list and update the list. + + In the resulting constructor, TREE_CONSTANT is set if all elts are + constant, and TREE_STATIC is set if, in addition, all elts are simple enough + constants that the assembler and linker can compute them. */ + +static tree +process_init_constructor (type, init, elts) + tree type, init, *elts; +{ + extern tree empty_init_node; + register tree tail; + /* List of the elements of the result constructor, + in reverse order. */ + register tree members = NULL; + tree result; + int allconstant = 1; + int allsimple = 1; + int erroneous = 0; + + /* Make TAIL be the list of elements to use for the initialization, + no matter how the data was given to us. */ + + if (elts) + { + if (warn_missing_braces) + warning ("aggregate has a partly bracketed initializer"); + tail = *elts; + } + else + tail = CONSTRUCTOR_ELTS (init); + + /* Gobble as many elements as needed, and make a constructor or initial value + for each element of this aggregate. Chain them together in result. + If there are too few, use 0 for each scalar ultimate component. */ + + if (TREE_CODE (type) == ARRAY_TYPE) + { + tree domain = TYPE_DOMAIN (type); + register long len; + register int i; + + if (domain) + len = (TREE_INT_CST_LOW (TYPE_MAX_VALUE (domain)) + - TREE_INT_CST_LOW (TYPE_MIN_VALUE (domain)) + + 1); + else + len = -1; /* Take as many as there are */ + + for (i = 0; (len < 0 || i < len) && tail != 0; i++) + { + register tree next1; + + if (TREE_VALUE (tail) != 0) + { + tree tail1 = tail; + next1 = digest_init (TYPE_MAIN_VARIANT (TREE_TYPE (type)), + TREE_VALUE (tail), &tail1); + my_friendly_assert (tail1 == 0 + || TREE_CODE (tail1) == TREE_LIST, 319); + if (tail == tail1 && len < 0) + { + error ("non-empty initializer for array of empty elements"); + /* Just ignore what we were supposed to use. */ + tail1 = 0; + } + tail = tail1; + } + else + { + next1 = error_mark_node; + tail = TREE_CHAIN (tail); + } + + if (next1 == error_mark_node) + erroneous = 1; + else if (!TREE_CONSTANT (next1)) + allconstant = 0; + else if (! initializer_constant_valid_p (next1)) + allsimple = 0; + members = tree_cons (NULL_TREE, next1, members); + } + } + if (TREE_CODE (type) == RECORD_TYPE && init != empty_init_node) + { + register tree field; + + if (tail) + { + if (TYPE_USES_VIRTUAL_BASECLASSES (type)) + { + sorry ("initializer list for object of class with virtual baseclasses"); + return error_mark_node; + } + + if (TYPE_BINFO_BASETYPES (type)) + { + sorry ("initializer list for object of class with baseclasses"); + return error_mark_node; + } + + if (TYPE_VIRTUAL_P (type)) + { + sorry ("initializer list for object using virtual functions"); + return error_mark_node; + } + } + + for (field = TYPE_FIELDS (type); field && tail; + field = TREE_CHAIN (field)) + { + register tree next1; + + if (! DECL_NAME (field)) + { + members = tree_cons (field, integer_zero_node, members); + continue; + } + + if (TREE_CODE (field) == CONST_DECL || TREE_CODE (field) == TYPE_DECL) + continue; + + /* A static member isn't considered "part of the object", so + it has no business even thinking about involving itself in + what an initializer-list is trying to do. */ + if (TREE_CODE (field) == VAR_DECL && TREE_STATIC (field)) + continue; + + if (TREE_VALUE (tail) != 0) + { + tree tail1 = tail; + + if (TYPE_PTRMEMFUNC_P (TREE_TYPE (field))) + { + tree t + = build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (TREE_TYPE (field)), + default_conversion (TREE_VALUE (tail)), + 0); + if (t == NULL_TREE) + return error_mark_node; + next1 = digest_init (TREE_TYPE (field), t, &tail1); + } + else + next1 = digest_init (TREE_TYPE (field), + TREE_VALUE (tail), &tail1); + my_friendly_assert (tail1 == 0 + || TREE_CODE (tail1) == TREE_LIST, 320); + tail = tail1; + } + else + { + next1 = error_mark_node; + tail = TREE_CHAIN (tail); + } + + if (next1 == error_mark_node) + erroneous = 1; + else if (!TREE_CONSTANT (next1)) + allconstant = 0; + else if (! initializer_constant_valid_p (next1)) + allsimple = 0; + members = tree_cons (field, next1, members); + } + for (; field; field = TREE_CHAIN (field)) + { + if (TREE_CODE (field) != FIELD_DECL) + continue; + + /* Does this field have a default initialization? */ + if (DECL_INITIAL (field)) + { + register tree next1 = DECL_INITIAL (field); + if (TREE_CODE (next1) == ERROR_MARK) + erroneous = 1; + else if (!TREE_CONSTANT (next1)) + allconstant = 0; + else if (! initializer_constant_valid_p (next1)) + allsimple = 0; + members = tree_cons (field, next1, members); + } + else if (TREE_READONLY (field)) + error ("uninitialized const member `%s'", + IDENTIFIER_POINTER (DECL_NAME (field))); + else if (TYPE_LANG_SPECIFIC (TREE_TYPE (field)) + && CLASSTYPE_READONLY_FIELDS_NEED_INIT (TREE_TYPE (field))) + error ("member `%s' with uninitialized const fields", + IDENTIFIER_POINTER (DECL_NAME (field))); + else if (TREE_CODE (TREE_TYPE (field)) == REFERENCE_TYPE) + error ("member `%s' is uninitialized reference", + IDENTIFIER_POINTER (DECL_NAME (field))); + } + } + + if (TREE_CODE (type) == UNION_TYPE && init != empty_init_node) + { + register tree field = TYPE_FIELDS (type); + register tree next1; + + /* Find the first named field. ANSI decided in September 1990 + that only named fields count here. */ + while (field && DECL_NAME (field) == 0) + field = TREE_CHAIN (field); + + /* If this element specifies a field, initialize via that field. */ + if (TREE_PURPOSE (tail) != NULL_TREE) + { + int win = 0; + + if (TREE_CODE (TREE_PURPOSE (tail)) == FIELD_DECL) + /* Handle the case of a call by build_c_cast. */ + field = TREE_PURPOSE (tail), win = 1; + else if (TREE_CODE (TREE_PURPOSE (tail)) != IDENTIFIER_NODE) + error ("index value instead of field name in union initializer"); + else + { + tree temp; + for (temp = TYPE_FIELDS (type); + temp; + temp = TREE_CHAIN (temp)) + if (DECL_NAME (temp) == TREE_PURPOSE (tail)) + break; + if (temp) + field = temp, win = 1; + else + error ("no field `%s' in union being initialized", + IDENTIFIER_POINTER (TREE_PURPOSE (tail))); + } + if (!win) + TREE_VALUE (tail) = error_mark_node; + } + + if (TREE_VALUE (tail) != 0) + { + tree tail1 = tail; + + next1 = digest_init (TREE_TYPE (field), + TREE_VALUE (tail), &tail1); + if (tail1 != 0 && TREE_CODE (tail1) != TREE_LIST) + abort (); + tail = tail1; + } + else + { + next1 = error_mark_node; + tail = TREE_CHAIN (tail); + } + + if (next1 == error_mark_node) + erroneous = 1; + else if (!TREE_CONSTANT (next1)) + allconstant = 0; + else if (initializer_constant_valid_p (next1) == 0) + allsimple = 0; + members = tree_cons (field, next1, members); + } + + /* If arguments were specified as a list, just remove the ones we used. */ + if (elts) + *elts = tail; + /* If arguments were specified as a constructor, + complain unless we used all the elements of the constructor. */ + else if (tail) + warning ("excess elements in aggregate initializer"); + + if (erroneous) + return error_mark_node; + + result = build (CONSTRUCTOR, type, NULL_TREE, nreverse (members)); + if (init) + TREE_HAS_CONSTRUCTOR (result) = TREE_HAS_CONSTRUCTOR (init); + if (allconstant) TREE_CONSTANT (result) = 1; + if (allconstant && allsimple) TREE_STATIC (result) = 1; + return result; +} + +/* Given a structure or union value DATUM, construct and return + the structure or union component which results from narrowing + that value by the types specified in TYPES. For example, given the + hierarchy + + class L { int ii; }; + class A : L { ... }; + class B : L { ... }; + class C : A, B { ... }; + + and the declaration + + C x; + + then the expression + + x::C::A::L::ii refers to the ii member of the L part of + of A part of the C object named by X. In this case, + DATUM would be x, and TYPES would be a SCOPE_REF consisting of + + SCOPE_REF + SCOPE_REF + C A + L + + The last entry in the SCOPE_REF is always an IDENTIFIER_NODE. + +*/ + +tree +build_scoped_ref (datum, types) + tree datum; + tree types; +{ + tree ref; + tree type = TREE_TYPE (datum); + + if (datum == error_mark_node) + return error_mark_node; + + if (TREE_CODE (type) == REFERENCE_TYPE) + type = TREE_TYPE (type); + + type = TYPE_MAIN_VARIANT (type); + + if (TREE_CODE (types) == SCOPE_REF) + { + /* We have some work to do. */ + struct type_chain { tree type; struct type_chain *next; } *chain = 0, *head = 0, scratch; + ref = build_unary_op (ADDR_EXPR, datum, 0); + while (TREE_CODE (types) == SCOPE_REF) + { + tree t = TREE_OPERAND (types, 1); + if (is_aggr_typedef (t, 1)) + { + head = (struct type_chain *)alloca (sizeof (struct type_chain)); + head->type = IDENTIFIER_TYPE_VALUE (t); + head->next = chain; + chain = head; + types = TREE_OPERAND (types, 0); + } + else return error_mark_node; + } + if (! is_aggr_typedef (types, 1)) + return error_mark_node; + + head = &scratch; + head->type = IDENTIFIER_TYPE_VALUE (types); + head->next = chain; + chain = head; + while (chain) + { + tree binfo = chain->type; + type = TREE_TYPE (TREE_TYPE (ref)); + if (binfo != TYPE_BINFO (type)) + { + binfo = get_binfo (binfo, type, 1); + if (binfo == error_mark_node) + return error_mark_node; + if (binfo == 0) + return error_not_base_type (chain->type, type); + ref = convert_pointer_to (binfo, ref); + } + chain = chain->next; + } + return build_indirect_ref (ref, "(compiler error in build_scoped_ref)"); + } + + /* This is an easy conversion. */ + if (is_aggr_typedef (types, 1)) + { + tree binfo = TYPE_BINFO (IDENTIFIER_TYPE_VALUE (types)); + if (binfo != TYPE_BINFO (type)) + { + binfo = get_binfo (binfo, type, 1); + if (binfo == error_mark_node) + return error_mark_node; + if (binfo == 0) + return error_not_base_type (IDENTIFIER_TYPE_VALUE (types), type); + } + + switch (TREE_CODE (datum)) + { + case NOP_EXPR: + case CONVERT_EXPR: + case FLOAT_EXPR: + case FIX_TRUNC_EXPR: + case FIX_FLOOR_EXPR: + case FIX_ROUND_EXPR: + case FIX_CEIL_EXPR: + ref = convert_pointer_to (binfo, + build_unary_op (ADDR_EXPR, TREE_OPERAND (datum, 0), 0)); + break; + default: + ref = convert_pointer_to (binfo, + build_unary_op (ADDR_EXPR, datum, 0)); + } + return build_indirect_ref (ref, "(compiler error in build_scoped_ref)"); + } + return error_mark_node; +} + +/* Build a reference to an object specified by the C++ `->' operator. + Usually this just involves dereferencing the object, but if the + `->' operator is overloaded, then such overloads must be + performed until an object which does not have the `->' operator + overloaded is found. An error is reported when circular pointer + delegation is detected. */ +tree +build_x_arrow (datum) + tree datum; +{ + tree types_memoized = NULL_TREE; + register tree rval = datum; + tree type = TREE_TYPE (rval); + tree last_rval; + + if (type == error_mark_node) + return error_mark_node; + + if (TREE_CODE (type) == REFERENCE_TYPE) + { + rval = convert_from_reference (rval); + type = TREE_TYPE (rval); + } + + if (IS_AGGR_TYPE (type) && TYPE_OVERLOADS_ARROW (type)) + { + while (rval = build_opfncall (COMPONENT_REF, LOOKUP_NORMAL, rval, NULL_TREE, NULL_TREE)) + { + if (rval == error_mark_node) + return error_mark_node; + + if (value_member (TREE_TYPE (rval), types_memoized)) + { + error ("circular pointer delegation detected"); + return error_mark_node; + } + else + { + types_memoized = tree_cons (NULL_TREE, TREE_TYPE (rval), + types_memoized); + } + last_rval = rval; + } + if (TREE_CODE (TREE_TYPE (last_rval)) == REFERENCE_TYPE) + last_rval = convert_from_reference (last_rval); + } + else + last_rval = default_conversion (rval); + + more: + /* Signature pointers are not dereferenced. */ + if (TYPE_LANG_SPECIFIC (TREE_TYPE (last_rval)) + && IS_SIGNATURE_POINTER (TREE_TYPE (last_rval))) + return last_rval; + + if (TREE_CODE (TREE_TYPE (last_rval)) == POINTER_TYPE) + return build_indirect_ref (last_rval, NULL_PTR); + + if (TREE_CODE (TREE_TYPE (last_rval)) == OFFSET_TYPE) + { + if (TREE_CODE (last_rval) == OFFSET_REF + && TREE_STATIC (TREE_OPERAND (last_rval, 1))) + { + last_rval = TREE_OPERAND (last_rval, 1); + if (TREE_CODE (TREE_TYPE (last_rval)) == REFERENCE_TYPE) + last_rval = convert_from_reference (last_rval); + goto more; + } + compiler_error ("invalid member type in build_x_arrow"); + return error_mark_node; + } + + if (types_memoized) + error ("result of `operator->()' yields non-pointer result"); + else + error ("base operand of `->' is not a pointer"); + return error_mark_node; +} + +/* Make an expression to refer to the COMPONENT field of + structure or union value DATUM. COMPONENT is an arbitrary + expression. DATUM has not already been checked out to be of + aggregate type. + + For C++, COMPONENT may be a TREE_LIST. This happens when we must + return an object of member type to a method of the current class, + but there is not yet enough typing information to know which one. + As a special case, if there is only one method by that name, + it is returned. Otherwise we return an expression which other + routines will have to know how to deal with later. */ +tree +build_m_component_ref (datum, component) + tree datum, component; +{ + tree type; + tree objtype = TREE_TYPE (datum); + tree rettype; + + if (TYPE_PTRMEMFUNC_P (TREE_TYPE (component))) + { + type = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (TREE_TYPE (component))); + rettype = type; + } + else + { + component = build_indirect_ref (component, NULL_PTR); + type = TREE_TYPE (component); + rettype = TREE_TYPE (TREE_TYPE (component)); + } + + if (datum == error_mark_node || component == error_mark_node) + return error_mark_node; + + if (! IS_AGGR_TYPE (objtype)) + { + cp_error ("cannot apply member pointer `%D' to `%E'", component, datum); + cp_error ("which is of non-aggregate type `%T'", objtype); + return error_mark_node; + } + + if (TREE_CODE (type) != OFFSET_TYPE && TREE_CODE (type) != METHOD_TYPE) + { + error ("non-member type composed with object"); + return error_mark_node; + } + + if (TREE_CODE (objtype) == REFERENCE_TYPE) + objtype = TREE_TYPE (objtype); + + if (! comptypes (TYPE_METHOD_BASETYPE (type), objtype, 0)) + { + cp_error ("member type `%T::' incompatible with object type `%T'", + TYPE_METHOD_BASETYPE (type), objtype); + return error_mark_node; + } + + return build (OFFSET_REF, rettype, datum, component); +} + +/* Return a tree node for the expression TYPENAME '(' PARMS ')'. + + Because we cannot tell whether this construct is really + a function call or a call to a constructor or a request for + a type conversion, we try all three, and report any ambiguities + we find. */ +tree +build_functional_cast (exp, parms) + tree exp; + tree parms; +{ + /* This is either a call to a constructor, + or a C cast in C++'s `functional' notation. */ + tree type, name = NULL_TREE; + tree expr_as_ctor = NULL_TREE; + tree expr_as_method = NULL_TREE; + tree expr_as_fncall = NULL_TREE; + tree expr_as_conversion = NULL_TREE; + + if (exp == error_mark_node || parms == error_mark_node) + return error_mark_node; + + if (TREE_CODE (exp) == IDENTIFIER_NODE) + { + name = exp; + + if (IDENTIFIER_HAS_TYPE_VALUE (exp)) + /* Either an enum or an aggregate type. */ + type = IDENTIFIER_TYPE_VALUE (exp); + else + { + type = lookup_name (exp, 1); + if (!type || TREE_CODE (type) != TYPE_DECL) + { + cp_error ("`%T' fails to be a typedef or built-in type", name); + return error_mark_node; + } + type = TREE_TYPE (type); + } + } + else + type = exp; + + if (IS_SIGNATURE (type)) + { + error ("signature type not allowed in cast or constructor expression"); + return error_mark_node; + } + + /* Prepare to evaluate as a call to a constructor. If this expression + is actually used, for example, + + return X (arg1, arg2, ...); + + then the slot being initialized will be filled in. */ + + if (name == NULL_TREE) + { + name = TYPE_NAME (type); + if (TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + } + + /* Try evaluating as a call to a function. */ + if (IDENTIFIER_CLASS_VALUE (name) + && (TREE_CODE (IDENTIFIER_CLASS_VALUE (name)) == TREE_LIST + || TREE_CODE (IDENTIFIER_CLASS_VALUE (name)) == FUNCTION_DECL)) + { + expr_as_method = build_method_call (current_class_decl, name, parms, + NULL_TREE, LOOKUP_SPECULATIVELY); + if (expr_as_method == error_mark_node) + expr_as_method = NULL_TREE; + } + + if (IDENTIFIER_GLOBAL_VALUE (name) + && (TREE_CODE (IDENTIFIER_GLOBAL_VALUE (name)) == TREE_LIST + || TREE_CODE (IDENTIFIER_GLOBAL_VALUE (name)) == FUNCTION_DECL)) + { + expr_as_fncall = build_overload_call (name, parms, 0, + (struct candidate *)0); + if (expr_as_fncall == NULL_TREE) + expr_as_fncall = error_mark_node; + } + + if (! IS_AGGR_TYPE (type)) + { + /* this must build a C cast */ + if (parms == NULL_TREE) + { + if (expr_as_method || expr_as_fncall) + goto return_function; + + return build1 (NOP_EXPR, type, integer_zero_node); + } + if (expr_as_method + || (expr_as_fncall && expr_as_fncall != error_mark_node)) + { + cp_error ("ambiguity between cast to `%#T' and function call", type); + return error_mark_node; + } + return build_c_cast (type, build_compound_expr (parms)); + } + + if (TYPE_SIZE (type) == NULL_TREE) + { + if (expr_as_method || expr_as_fncall) + goto return_function; + cp_error ("type `%T' is not yet defined", type); + return error_mark_node; + } + + if (parms && TREE_CHAIN (parms) == NULL_TREE) + expr_as_conversion + = build_type_conversion (CONVERT_EXPR, type, TREE_VALUE (parms), 0); + + if (! TYPE_NEEDS_CONSTRUCTING (type) && parms != NULL_TREE) + { + char *msg = 0; + + if (parms == NULL_TREE) + msg = "argument missing in cast to `%T' type"; + else if (TREE_CHAIN (parms) == NULL_TREE) + { + if (expr_as_conversion == NULL_TREE) + msg = "conversion to type `%T' failed"; + } + else msg = "type `%T' does not have a constructor"; + + if ((expr_as_method || expr_as_fncall) && expr_as_conversion) + msg = "ambiguity between conversion to `%T' and function call"; + else if (expr_as_method || expr_as_fncall) + goto return_function; + else if (expr_as_conversion) + return expr_as_conversion; + + cp_error (msg, type); + return error_mark_node; + } + +#if 0 + /* Constructors are not inherited... --jason */ + if (! TYPE_HAS_CONSTRUCTOR (type)) + { + if (expr_as_method || expr_as_fncall) + goto return_function; + if (expr_as_conversion) + return expr_as_conversion; + + /* Look through this type until we find the + base type which has a constructor. */ + do + { + tree binfos = TYPE_BINFO_BASETYPES (type); + int i, index = 0; + + while (binfos && TREE_VEC_LENGTH (binfos) == 1 + && ! TYPE_HAS_CONSTRUCTOR (type)) + { + type = BINFO_TYPE (TREE_VEC_ELT (binfos, 0)); + binfos = TYPE_BINFO_BASETYPES (type); + } + if (TYPE_HAS_CONSTRUCTOR (type)) + break; + /* Hack for MI. */ + i = binfos ? TREE_VEC_LENGTH (binfos) : 0; + if (i == 0) break; + while (--i > 0) + { + if (TYPE_HAS_CONSTRUCTOR (BINFO_TYPE (TREE_VEC_ELT (binfos, i)))) + { + if (index == 0) + index = i; + else + { + error ("multiple base classes with constructor, ambiguous"); + type = 0; + break; + } + } + } + if (type == 0) + break; + } while (! TYPE_HAS_CONSTRUCTOR (type)); + if (type == 0) + return error_mark_node; + } + name = TYPE_NAME (type); + if (TREE_CODE (name) == TYPE_DECL) + name = DECL_NAME (name); + + my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 321); +#endif + + { + int flags = LOOKUP_SPECULATIVELY|LOOKUP_COMPLAIN; + + if (parms && TREE_CHAIN (parms) == NULL_TREE) + flags |= LOOKUP_NO_CONVERSION; + + try_again: + expr_as_ctor = build_method_call (NULL_TREE, name, parms, + NULL_TREE, flags); + + if (expr_as_ctor && expr_as_ctor != error_mark_node) + { +#if 0 + /* mrs Mar 12, 1992 I claim that if it is a constructor, it is + impossible to be an expr_as_method, without being a + constructor call. */ + if (expr_as_method + || (expr_as_fncall && expr_as_fncall != error_mark_node)) +#else + if (expr_as_fncall && expr_as_fncall != error_mark_node) +#endif + { + cp_warning ("function hides constructor for class `%T'", type); + return expr_as_fncall; + } + else if (expr_as_conversion && expr_as_conversion != error_mark_node) + { + /* ANSI C++ June 5 1992 WP 12.3.2.6.1 */ + cp_error ("ambiguity between conversion to `%T' and constructor", + type); + return error_mark_node; + } + + if (current_function_decl) + return build_cplus_new (type, expr_as_ctor, 0); + + { + register tree parm = TREE_OPERAND (expr_as_ctor, 1); + + /* Initializers for static variables and parameters have + to handle doing the initialization and cleanup themselves. */ + my_friendly_assert (TREE_CODE (expr_as_ctor) == CALL_EXPR, 322); +#if 0 + /* The following assertion fails in cases where we are initializing + a static member variable of a particular instance of a template + class with a call to a constructor of the given instance, as in: + + TMPL<int> object = TMPL<int>(); + + Curiously, the assertion does not fail if we do the same thing + for a static member of a non-template class, as in: + + T object = T(); + + I can't see why we should care here whether or not the initializer + expression involves a call to `new', so for the time being, it + seems best to just avoid doing this assertion. */ + my_friendly_assert (TREE_CALLS_NEW (TREE_VALUE (parm)), 323); +#endif + TREE_VALUE (parm) = NULL_TREE; + expr_as_ctor = build_indirect_ref (expr_as_ctor, NULL_PTR); + TREE_HAS_CONSTRUCTOR (expr_as_ctor) = 1; + } + return expr_as_ctor; + } + + /* If it didn't work going through constructor, try type conversion. */ + if (! (flags & LOOKUP_COMPLAIN)) + { + if (expr_as_conversion) + return expr_as_conversion; + if (flags & LOOKUP_NO_CONVERSION) + { + flags = LOOKUP_NORMAL; + goto try_again; + } + } + + if (expr_as_conversion) + { + if (expr_as_method || expr_as_fncall) + { + cp_error ("ambiguity between conversion to `%T' and function call", + type); + return error_mark_node; + } + return expr_as_conversion; + } + return_function: + if (expr_as_method) + return build_method_call (current_class_decl, name, parms, + NULL_TREE, LOOKUP_NORMAL); + if (expr_as_fncall) + return expr_as_fncall == error_mark_node + ? build_overload_call (name, parms, LOOKUP_COMPLAIN, (struct candidate *)0) + : expr_as_fncall; + cp_error ("no suitable conversion to `%T' exists", type); + return error_mark_node; + } +} + +/* Return the character string for the name that encodes the + enumeral value VALUE in the domain TYPE. */ +char * +enum_name_string (value, type) + tree value; + tree type; +{ + register tree values = TYPE_VALUES (type); + register HOST_WIDE_INT intval = TREE_INT_CST_LOW (value); + + my_friendly_assert (TREE_CODE (type) == ENUMERAL_TYPE, 324); + while (values + && TREE_INT_CST_LOW (TREE_VALUE (values)) != intval) + values = TREE_CHAIN (values); + if (values == NULL_TREE) + { + char *buf = (char *)oballoc (16 + TYPE_NAME_LENGTH (type)); + + /* Value must have been cast. */ + sprintf (buf, "(enum %s)%d", + TYPE_NAME_STRING (type), intval); + return buf; + } + return IDENTIFIER_POINTER (TREE_PURPOSE (values)); +} + +/* Print out a language-specific error message for + (Pascal) case or (C) switch statements. + CODE tells what sort of message to print. + TYPE is the type of the switch index expression. + NEW is the new value that we were trying to add. + OLD is the old value that stopped us from adding it. */ +void +report_case_error (code, type, new_value, old_value) + int code; + tree type; + tree new_value, old_value; +{ + if (code == 1) + { + if (new_value) + error ("case label not within a switch statement"); + else + error ("default label not within a switch statement"); + } + else if (code == 2) + { + if (new_value == 0) + { + error ("multiple default labels in one switch"); + return; + } + if (TREE_CODE (new_value) == RANGE_EXPR) + if (TREE_CODE (old_value) == RANGE_EXPR) + { + char *buf = (char *)alloca (4 * (8 + TYPE_NAME_LENGTH (type))); + if (TREE_CODE (type) == ENUMERAL_TYPE) + sprintf (buf, "overlapping ranges [%s..%s], [%s..%s] in case expression", + enum_name_string (TREE_OPERAND (new_value, 0), type), + enum_name_string (TREE_OPERAND (new_value, 1), type), + enum_name_string (TREE_OPERAND (old_value, 0), type), + enum_name_string (TREE_OPERAND (old_value, 1), type)); + else + sprintf (buf, "overlapping ranges [%d..%d], [%d..%d] in case expression", + TREE_INT_CST_LOW (TREE_OPERAND (new_value, 0)), + TREE_INT_CST_LOW (TREE_OPERAND (new_value, 1)), + TREE_INT_CST_LOW (TREE_OPERAND (old_value, 0)), + TREE_INT_CST_LOW (TREE_OPERAND (old_value, 1))); + error (buf); + } + else + { + char *buf = (char *)alloca (4 * (8 + TYPE_NAME_LENGTH (type))); + if (TREE_CODE (type) == ENUMERAL_TYPE) + sprintf (buf, "range [%s..%s] includes element `%s' in case expression", + enum_name_string (TREE_OPERAND (new_value, 0), type), + enum_name_string (TREE_OPERAND (new_value, 1), type), + enum_name_string (old_value, type)); + else + sprintf (buf, "range [%d..%d] includes (%d) in case expression", + TREE_INT_CST_LOW (TREE_OPERAND (new_value, 0)), + TREE_INT_CST_LOW (TREE_OPERAND (new_value, 1)), + TREE_INT_CST_LOW (old_value)); + error (buf); + } + else if (TREE_CODE (old_value) == RANGE_EXPR) + { + char *buf = (char *)alloca (4 * (8 + TYPE_NAME_LENGTH (type))); + if (TREE_CODE (type) == ENUMERAL_TYPE) + sprintf (buf, "range [%s..%s] includes element `%s' in case expression", + enum_name_string (TREE_OPERAND (old_value, 0), type), + enum_name_string (TREE_OPERAND (old_value, 1), type), + enum_name_string (new_value, type)); + else + sprintf (buf, "range [%d..%d] includes (%d) in case expression", + TREE_INT_CST_LOW (TREE_OPERAND (old_value, 0)), + TREE_INT_CST_LOW (TREE_OPERAND (old_value, 1)), + TREE_INT_CST_LOW (new_value)); + error (buf); + } + else + { + if (TREE_CODE (type) == ENUMERAL_TYPE) + error ("duplicate label `%s' in switch statement", + enum_name_string (new_value, type)); + else + error ("duplicate label (%d) in switch statement", + TREE_INT_CST_LOW (new_value)); + } + } + else if (code == 3) + { + if (TREE_CODE (type) == ENUMERAL_TYPE) + warning ("case value out of range for enum %s", + TYPE_NAME_STRING (type)); + else + warning ("case value out of range"); + } + else if (code == 4) + { + if (TREE_CODE (type) == ENUMERAL_TYPE) + error ("range values `%s' and `%s' reversed", + enum_name_string (new_value, type), + enum_name_string (old_value, type)); + else + error ("range values reversed"); + } +} diff --git a/gcc/cp/xref.c b/gcc/cp/xref.c new file mode 100644 index 0000000..4a300c2 --- /dev/null +++ b/gcc/cp/xref.c @@ -0,0 +1,827 @@ +/* Code for handling XREF output from GNU C++. + Copyright (C) 1992, 1993 Free Software Foundation, Inc. + Contributed by Michael Tiemann (tiemann@cygnus.com) + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#include "config.h" +#include "tree.h" +#include <stdio.h> +#include "cp-tree.h" +#include "input.h" + +#include <ctype.h> + +extern char *getpwd (); + +extern char *index (); +extern char *rindex (); + +/* The character(s) used to join a directory specification (obtained with + getwd or equivalent) with a non-absolute file name. */ + +#ifndef FILE_NAME_JOINER +#define FILE_NAME_JOINER "/" +#endif + +/* Nonzero if NAME as a file name is absolute. */ +#ifndef FILE_NAME_ABSOLUTE_P +#define FILE_NAME_ABSOLUTE_P(NAME) (NAME[0] == '/') +#endif + +/* For cross referencing. */ + +int flag_gnu_xref; + +/************************************************************************/ +/* */ +/* Common definitions */ +/* */ +/************************************************************************/ + +#ifndef TRUE +#define TRUE 1 +#endif +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef NULL +#define NULL 0 +#endif + +#define PALLOC(typ) ((typ *) calloc(1,sizeof(typ))) + + +/* Return a malloc'd copy of STR. */ +#define SALLOC(str) \ + ((char *) ((str) == NULL ? NULL \ + : (char *) strcpy ((char *) malloc (strlen ((str)) + 1), (str)))) +#define SFREE(str) (str != NULL && (free(str),0)) + +#define STREQL(s1,s2) (strcmp((s1),(s2)) == 0) +#define STRNEQ(s1,s2) (strcmp((s1),(s2)) != 0) +#define STRLSS(s1,s2) (strcmp((s1),(s2)) < 0) +#define STRLEQ(s1,s2) (strcmp((s1),(s2)) <= 0) +#define STRGTR(s1,s2) (strcmp((s1),(s2)) > 0) +#define STRGEQ(s1,s2) (strcmp((s1),(s2)) >= 0) + +/************************************************************************/ +/* */ +/* Type definitions */ +/* */ +/************************************************************************/ + + +typedef struct _XREF_FILE * XREF_FILE; +typedef struct _XREF_SCOPE * XREF_SCOPE; + +typedef struct _XREF_FILE +{ + char *name; + char *outname; + XREF_FILE next; +} XREF_FILE_INFO; + +typedef struct _XREF_SCOPE +{ + int gid; + int lid; + XREF_FILE file; + int start; + XREF_SCOPE outer; +} XREF_SCOPE_INFO; + +/************************************************************************/ +/* */ +/* Local storage */ +/* */ +/************************************************************************/ + +static char doing_xref = 0; +static FILE * xref_file = NULL; +static char xref_name[1024]; +static XREF_FILE all_files = NULL; +static char * wd_name = NULL; +static XREF_SCOPE cur_scope = NULL; +static int scope_ctr = 0; +static XREF_FILE last_file = NULL; +static tree last_fndecl = NULL; + +/************************************************************************/ +/* */ +/* Forward definitions */ +/* */ +/************************************************************************/ + +extern void GNU_xref_begin(); +extern void GNU_xref_end(); +extern void GNU_xref_file(); +extern void GNU_xref_start_scope(); +extern void GNU_xref_end_scope(); +extern void GNU_xref_ref(); +extern void GNU_xref_decl(); +extern void GNU_xref_call(); +extern void GNU_xref_function(); +extern void GNU_xref_assign(); +extern void GNU_xref_hier(); +extern void GNU_xref_member(); + +static void gen_assign(); +static XREF_FILE find_file(); +static char * filename(); +static char * fctname(); +static char * declname(); +static void simplify_type(); +static char * fixname(); +static void open_xref_file(); + +extern char * type_as_string(); + +/* Start cross referencing. FILE is the name of the file we xref. */ + +void +GNU_xref_begin (file) + char *file; +{ + doing_xref = 1; + + if (file != NULL && STRNEQ (file,"-")) + { + open_xref_file(file); + GNU_xref_file(file); + } +} + +/* Finish cross-referencing. ERRCNT is the number of errors + we encountered. */ + +void +GNU_xref_end (ect) + int ect; +{ + XREF_FILE xf; + + if (!doing_xref) return; + + xf = find_file (input_filename); + if (xf == NULL) return; + + while (cur_scope != NULL) + GNU_xref_end_scope(cur_scope->gid,0,0,0,0); + + doing_xref = 0; + + if (xref_file == NULL) return; + + fclose (xref_file); + + xref_file = NULL; + all_files = NULL; + + if (ect > 0) unlink (xref_name); +} + +/* Write out xref for file named NAME. */ + +void +GNU_xref_file (name) + char *name; +{ + XREF_FILE xf; + + if (!doing_xref || name == NULL) return; + + if (xref_file == NULL) + { + open_xref_file (name); + if (!doing_xref) return; + } + + if (all_files == NULL) + fprintf(xref_file,"SCP * 0 0 0 0 RESET\n"); + + xf = find_file (name); + if (xf != NULL) return; + + xf = PALLOC (XREF_FILE_INFO); + xf->name = SALLOC (name); + xf->next = all_files; + all_files = xf; + + if (wd_name == NULL) + wd_name = getpwd (); + + if (FILE_NAME_ABSOLUTE_P (name) || ! wd_name) + xf->outname = xf->name; + else + { + char *nmbuf + = (char *) malloc (strlen (wd_name) + strlen (FILE_NAME_JOINER) + + strlen (name) + 1); + sprintf (nmbuf, "%s%s%s", wd_name, FILE_NAME_JOINER, name); + name = nmbuf; + xf->outname = nmbuf; + } + + fprintf (xref_file, "FIL %s %s 0\n", name, wd_name); + + filename (xf); + fctname (NULL); +} + +/* Start a scope identified at level ID. */ + +void +GNU_xref_start_scope (id) + HOST_WIDE_INT id; +{ + XREF_SCOPE xs; + XREF_FILE xf; + + if (!doing_xref) return; + xf = find_file (input_filename); + + xs = PALLOC (XREF_SCOPE_INFO); + xs->file = xf; + xs->start = lineno; + if (xs->start <= 0) xs->start = 1; + xs->gid = id; + xs->lid = ++scope_ctr; + xs->outer = cur_scope; + cur_scope = xs; +} + +/* Finish a scope at level ID. + INID is ??? + PRM is ??? + KEEP is nonzero iff this scope is retained (nonzero if it's + a compiler-generated invisible scope). + TRNS is ??? */ + +void +GNU_xref_end_scope (id,inid,prm,keep,trns) + HOST_WIDE_INT id; + HOST_WIDE_INT inid; + int prm,keep,trns; +{ + XREF_FILE xf; + XREF_SCOPE xs,lxs,oxs; + char *stype; + + if (!doing_xref) return; + xf = find_file (input_filename); + if (xf == NULL) return; + + lxs = NULL; + for (xs = cur_scope; xs != NULL; xs = xs->outer) + { + if (xs->gid == id) break; + lxs = xs; + } + if (xs == NULL) return; + + if (inid != 0) { + for (oxs = cur_scope; oxs != NULL; oxs = oxs->outer) { + if (oxs->gid == inid) break; + } + if (oxs == NULL) return; + inid = oxs->lid; + } + + if (prm == 2) stype = "SUE"; + else if (prm != 0) stype = "ARGS"; + else if (keep == 2 || inid != 0) stype = "INTERN"; + else stype = "EXTERN"; + + fprintf (xref_file,"SCP %s %d %d %d %d %s\n", + filename (xf), xs->start, lineno,xs->lid, inid, stype); + + if (lxs == NULL) cur_scope = xs->outer; + else lxs->outer = xs->outer; + + free (xs); +} + +/* Output a reference to NAME in FNDECL. */ + +void +GNU_xref_ref (fndecl,name) + tree fndecl; + char *name; +{ + XREF_FILE xf; + + if (!doing_xref) return; + xf = find_file (input_filename); + if (xf == NULL) return; + + fprintf (xref_file, "REF %s %d %s %s\n", + filename (xf), lineno, fctname (fndecl), name); +} + +/* Output a reference to DECL in FNDECL. */ + +void +GNU_xref_decl (fndecl,decl) + tree fndecl; + tree decl; +{ + XREF_FILE xf,xf1; + char *cls; + char *name; + char buf[10240]; + int uselin; + + if (!doing_xref) return; + xf = find_file (input_filename); + if (xf == NULL) return; + + uselin = FALSE; + + if (TREE_CODE (decl) == TYPE_DECL) cls = "TYPEDEF"; + else if (TREE_CODE (decl) == FIELD_DECL) cls = "FIELD"; + else if (TREE_CODE (decl) == VAR_DECL) + { + if (fndecl == NULL && TREE_STATIC(decl) + && TREE_READONLY(decl) && DECL_INITIAL(decl) != 0 + && !TREE_PUBLIC(decl) && !DECL_EXTERNAL(decl) + && DECL_MODE(decl) != BLKmode) cls = "CONST"; + else if (DECL_EXTERNAL(decl)) cls = "EXTERN"; + else if (TREE_PUBLIC(decl)) cls = "EXTDEF"; + else if (TREE_STATIC(decl)) cls = "STATIC"; + else if (DECL_REGISTER(decl)) cls = "REGISTER"; + else cls = "AUTO"; + } + else if (TREE_CODE (decl) == PARM_DECL) cls = "PARAM"; + else if (TREE_CODE (decl) == FIELD_DECL) cls = "FIELD"; + else if (TREE_CODE (decl) == CONST_DECL) cls = "CONST"; + else if (TREE_CODE (decl) == FUNCTION_DECL) + { + if (DECL_EXTERNAL (decl)) cls = "EXTERN"; + else if (TREE_PUBLIC (decl)) cls = "EFUNCTION"; + else cls = "SFUNCTION"; + } + else if (TREE_CODE (decl) == LABEL_DECL) cls = "LABEL"; + else if (TREE_CODE (decl) == UNION_TYPE) + { + cls = "UNIONID"; + decl = TYPE_NAME (decl); + uselin = TRUE; + } + else if (TREE_CODE (decl) == RECORD_TYPE) + { + if (CLASSTYPE_DECLARED_CLASS (decl)) cls = "CLASSID"; + else if (IS_SIGNATURE (decl)) cls = "SIGNATUREID"; + else cls = "STRUCTID"; + decl = TYPE_NAME (decl); + uselin = TRUE; + } + else if (TREE_CODE (decl) == ENUMERAL_TYPE) + { + cls = "ENUMID"; + decl = TYPE_NAME (decl); + uselin = TRUE; + } + else cls = "UNKNOWN"; + + if (decl == NULL || DECL_NAME (decl) == NULL) return; + + if (uselin && decl->decl.linenum > 0 && decl->decl.filename != NULL) + { + xf1 = find_file (decl->decl.filename); + if (xf1 != NULL) + { + lineno = decl->decl.linenum; + xf = xf1; + } + } + + if (DECL_ASSEMBLER_NAME (decl)) + name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); + else + name = IDENTIFIER_POINTER (DECL_NAME (decl)); + + strcpy (buf, type_as_string (TREE_TYPE (decl), 0)); + simplify_type (buf); + + fprintf (xref_file, "DCL %s %d %s %d %s %s %s\n", + filename(xf), lineno, name, + (cur_scope != NULL ? cur_scope->lid : 0), + cls, fctname(fndecl), buf); + + if (STREQL (cls, "STRUCTID") || STREQL (cls, "UNIONID") + || STREQL (cls, "SIGNATUREID")) + { + cls = "CLASSID"; + fprintf (xref_file, "DCL %s %d %s %d %s %s %s\n", + filename(xf), lineno,name, + (cur_scope != NULL ? cur_scope->lid : 0), + cls, fctname(fndecl), buf); + } +} + +/* Output a reference to a call to NAME in FNDECL. */ + +void +GNU_xref_call (fndecl, name) + tree fndecl; + char *name; +{ + XREF_FILE xf; + char buf[1024]; + char *s; + + if (!doing_xref) return; + xf = find_file (input_filename); + if (xf == NULL) return; + name = fixname (name, buf); + + for (s = name; *s != 0; ++s) + if (*s == '_' && s[1] == '_') break; + if (*s != 0) GNU_xref_ref (fndecl, name); + + fprintf (xref_file, "CAL %s %d %s %s\n", + filename (xf), lineno, name, fctname (fndecl)); +} + +/* Output cross-reference info about FNDECL. If non-NULL, + ARGS are the arguments for the function (i.e., before the FUNCTION_DECL + has been fully built). */ + +void +GNU_xref_function (fndecl, args) + tree fndecl; + tree args; +{ + XREF_FILE xf; + int ct; + char buf[1024]; + + if (!doing_xref) return; + xf = find_file (input_filename); + if (xf == NULL) return; + + ct = 0; + buf[0] = 0; + if (args == NULL) args = DECL_ARGUMENTS (fndecl); + + GNU_xref_decl (NULL, fndecl); + + for ( ; args != NULL; args = TREE_CHAIN (args)) + { + GNU_xref_decl (fndecl,args); + if (ct != 0) strcat (buf,","); + strcat (buf, declname (args)); + ++ct; + } + + fprintf (xref_file, "PRC %s %d %s %d %d %s\n", + filename(xf), lineno, declname(fndecl), + (cur_scope != NULL ? cur_scope->lid : 0), + ct, buf); +} + +/* Output cross-reference info about an assignment to NAME. */ + +void +GNU_xref_assign(name) + tree name; +{ + XREF_FILE xf; + + if (!doing_xref) return; + xf = find_file(input_filename); + if (xf == NULL) return; + + gen_assign(xf, name); +} + +static void +gen_assign(xf, name) + XREF_FILE xf; + tree name; +{ + char *s; + + s = NULL; + + switch (TREE_CODE (name)) + { + case IDENTIFIER_NODE : + s = IDENTIFIER_POINTER(name); + break; + case VAR_DECL : + s = declname(name); + break; + case COMPONENT_REF : + gen_assign(xf, TREE_OPERAND(name, 0)); + gen_assign(xf, TREE_OPERAND(name, 1)); + break; + case INDIRECT_REF : + case OFFSET_REF : + case ARRAY_REF : + case BUFFER_REF : + gen_assign(xf, TREE_OPERAND(name, 0)); + break; + case COMPOUND_EXPR : + gen_assign(xf, TREE_OPERAND(name, 1)); + break; + default : + break; + } + + if (s != NULL) + fprintf(xref_file, "ASG %s %d %s\n", filename(xf), lineno, s); +} + +/* Output cross-reference info about a class hierarchy. + CLS is the class type of interest. BASE is a baseclass + for CLS. PUB and VIRT give the access info about + the class derivation. FRND is nonzero iff BASE is a friend + of CLS. + + ??? Needs to handle nested classes. */ +void +GNU_xref_hier(cls, base, pub, virt, frnd) + char *cls; + char *base; + int pub; + int virt; + int frnd; +{ + XREF_FILE xf; + + if (!doing_xref) return; + xf = find_file(input_filename); + if (xf == NULL) return; + + fprintf(xref_file, "HIE %s %d %s %s %d %d %d\n", + filename(xf), lineno, cls, base, pub, virt, frnd); +} + +/* Output cross-reference info about class members. CLS + is the containing type; FLD is the class member. */ + +void +GNU_xref_member(cls, fld) + tree cls; + tree fld; +{ + XREF_FILE xf; + char *prot; + int confg, pure; + char *d; + int i; + char buf[1024], bufa[1024]; + + if (!doing_xref) return; + xf = find_file(fld->decl.filename); + if (xf == NULL) return; + + if (TREE_PRIVATE (fld)) prot = "PRIVATE"; + else if (TREE_PROTECTED(fld)) prot = "PROTECTED"; + else prot = "PUBLIC"; + + confg = 0; + if (TREE_CODE (fld) == FUNCTION_DECL && DECL_CONST_MEMFUNC_P(fld)) + confg = 1; + else if (TREE_CODE (fld) == CONST_DECL) + confg = 1; + + pure = 0; + if (TREE_CODE (fld) == FUNCTION_DECL && DECL_ABSTRACT_VIRTUAL_P(fld)) + pure = 1; + + d = IDENTIFIER_POINTER(cls); + sprintf(buf, "%d%s", strlen(d), d); + i = strlen(buf); + strcpy(bufa, declname(fld)); + +#ifdef XREF_SHORT_MEMBER_NAMES + for (p = &bufa[1]; *p != 0; ++p) + { + if (p[0] == '_' && p[1] == '_' && p[2] >= '0' && p[2] <= '9') { + if (strncmp(&p[2], buf, i) == 0) *p = 0; + break; + } + else if (p[0] == '_' && p[1] == '_' && p[2] == 'C' && p[3] >= '0' && p[3] <= '9') { + if (strncmp(&p[3], buf, i) == 0) *p = 0; + break; + } + } +#endif + + fprintf(xref_file, "MEM %s %d %s %s %s %d %d %d %d %d %d %d\n", + filename(xf), fld->decl.linenum, d, bufa, prot, + (TREE_CODE (fld) == FUNCTION_DECL ? 0 : 1), + (DECL_INLINE (fld) ? 1 : 0), + (DECL_FRIEND_P(fld) ? 1 : 0), + (DECL_VINDEX(fld) ? 1 : 0), + (TREE_STATIC(fld) ? 1 : 0), + pure, confg); +} + +/* Find file entry given name. */ + +static XREF_FILE +find_file(name) + char *name; +{ + XREF_FILE xf; + + for (xf = all_files; xf != NULL; xf = xf->next) { + if (STREQL(name, xf->name)) break; + } + + return xf; +} + +/* Return filename for output purposes. */ + +static char * +filename(xf) + XREF_FILE xf; +{ + if (xf == NULL) { + last_file = NULL; + return "*"; + } + + if (last_file == xf) return "*"; + + last_file = xf; + + return xf->outname; +} + +/* Return function name for output purposes. */ + +static char * +fctname(fndecl) + tree fndecl; +{ + static char fctbuf[1024]; + char *s; + + if (fndecl == NULL && last_fndecl == NULL) return "*"; + + if (fndecl == NULL) + { + last_fndecl = NULL; + return "*TOP*"; + } + + if (fndecl == last_fndecl) return "*"; + + last_fndecl = fndecl; + + s = declname(fndecl); + s = fixname(s, fctbuf); + + return s; +} + +/* Return decl name for output purposes. */ + +static char * +declname(dcl) + tree dcl; +{ + if (DECL_NAME (dcl) == NULL) return "?"; + + if (DECL_ASSEMBLER_NAME (dcl)) + return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (dcl)); + else + return IDENTIFIER_POINTER (DECL_NAME (dcl)); +} + +/* Simplify a type string by removing unneeded parenthesis. */ + +static void +simplify_type(typ) + char *typ; +{ + char *s; + int lvl, i; + + i = strlen(typ); + while (i > 0 && isspace(typ[i-1])) typ[--i] = 0; + + if (i > 7 && STREQL(&typ[i-5], "const")) + { + typ[i-5] = 0; + i -= 5; + } + + if (typ[i-1] != ')') return; + + s = &typ[i-2]; + lvl = 1; + while (*s != 0) { + if (*s == ')') ++lvl; + else if (*s == '(') + { + --lvl; + if (lvl == 0) + { + s[1] = ')'; + s[2] = 0; + break; + } + } + --s; + } + + if (*s != 0 && s[-1] == ')') + { + --s; + --s; + if (*s == '(') s[2] = 0; + else if (*s == ':') { + while (*s != '(') --s; + s[1] = ')'; + s[2] = 0; + } + } +} + +/* Fixup a function name (take care of embedded spaces). */ + +static char * +fixname(nam, buf) + char *nam; + char *buf; +{ + char *s, *t; + int fg; + + s = nam; + t = buf; + fg = 0; + + while (*s != 0) + { + if (*s == ' ') + { + *t++ = '\36'; + ++fg; + } + else *t++ = *s; + ++s; + } + *t = 0; + + if (fg == 0) return nam; + + return buf; +} + +/* Open file for xrefing. */ + +static void +open_xref_file(file) + char *file; +{ + char *s, *t; + +#ifdef XREF_FILE_NAME + XREF_FILE_NAME (xref_name, file); +#else + s = rindex (file, '/'); + if (s == NULL) + sprintf (xref_name, ".%s.gxref", file); + else + { + ++s; + strcpy (xref_name, file); + t = rindex (xref_name, '/'); + ++t; + *t++ = '.'; + strcpy (t, s); + strcat (t, ".gxref"); + } +#endif /* no XREF_FILE_NAME */ + + xref_file = fopen(xref_name, "w"); + + if (xref_file == NULL) + { + error("Can't create cross-reference file `%s'", xref_name); + doing_xref = 0; + } +} |