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+/* YACC parser for C expressions, for GDB.
+ Copyright (C) 1986, 1989, 1990, 1991, 1993, 1994
+ Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program 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 of the License, or
+(at your option) any later version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* Parse a C expression from text in a string,
+ and return the result as a struct expression pointer.
+ That structure contains arithmetic operations in reverse polish,
+ with constants represented by operations that are followed by special data.
+ See expression.h for the details of the format.
+ What is important here is that it can be built up sequentially
+ during the process of parsing; the lower levels of the tree always
+ come first in the result.
+
+ Note that malloc's and realloc's in this file are transformed to
+ xmalloc and xrealloc respectively by the same sed command in the
+ makefile that remaps any other malloc/realloc inserted by the parser
+ generator. Doing this with #defines and trying to control the interaction
+ with include files (<malloc.h> and <stdlib.h> for example) just became
+ too messy, particularly when such includes can be inserted at random
+ times by the parser generator. */
+
+%{
+
+#include "defs.h"
+#include "gdb_string.h"
+#include <ctype.h>
+#include "expression.h"
+
+#include "objc-lang.h" /* for objc language constructs */
+
+#include "value.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "c-lang.h"
+#include "bfd.h" /* Required by objfiles.h. */
+#include "symfile.h" /* Required by objfiles.h. */
+#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
+#include "top.h"
+#include "completer.h" /* For skip_quoted(). */
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
+ as well as gratuitiously global symbol names, so we can have multiple
+ yacc generated parsers in gdb. Note that these are only the variables
+ produced by yacc. If other parser generators (bison, byacc, etc) produce
+ additional global names that conflict at link time, then those parser
+ generators need to be fixed instead of adding those names to this list. */
+
+#define yymaxdepth objc_maxdepth
+#define yyparse objc_parse
+#define yylex objc_lex
+#define yyerror objc_error
+#define yylval objc_lval
+#define yychar objc_char
+#define yydebug objc_debug
+#define yypact objc_pact
+#define yyr1 objc_r1
+#define yyr2 objc_r2
+#define yydef objc_def
+#define yychk objc_chk
+#define yypgo objc_pgo
+#define yyact objc_act
+#define yyexca objc_exca
+#define yyerrflag objc_errflag
+#define yynerrs objc_nerrs
+#define yyps objc_ps
+#define yypv objc_pv
+#define yys objc_s
+#define yy_yys objc_yys
+#define yystate objc_state
+#define yytmp objc_tmp
+#define yyv objc_v
+#define yy_yyv objc_yyv
+#define yyval objc_val
+#define yylloc objc_lloc
+#define yyreds objc_reds /* With YYDEBUG defined */
+#define yytoks objc_toks /* With YYDEBUG defined */
+#define yyname objc_name /* With YYDEBUG defined */
+#define yyrule objc_rule /* With YYDEBUG defined */
+#define yylhs objc_yylhs
+#define yylen objc_yylen
+#define yydefred objc_yydefred
+#define yydgoto objc_yydgoto
+#define yysindex objc_yysindex
+#define yyrindex objc_yyrindex
+#define yygindex objc_yygindex
+#define yytable objc_yytable
+#define yycheck objc_yycheck
+
+#ifndef YYDEBUG
+#define YYDEBUG 0 /* Default to no yydebug support */
+#endif
+
+int
+yyparse PARAMS ((void));
+
+static int
+yylex PARAMS ((void));
+
+void
+yyerror PARAMS ((char *));
+
+%}
+
+/* Although the yacc "value" of an expression is not used,
+ since the result is stored in the structure being created,
+ other node types do have values. */
+
+%union
+ {
+ LONGEST lval;
+ struct {
+ LONGEST val;
+ struct type *type;
+ } typed_val_int;
+ struct {
+ DOUBLEST dval;
+ struct type *type;
+ } typed_val_float;
+ struct symbol *sym;
+ struct type *tval;
+ struct stoken sval;
+ struct ttype tsym;
+ struct symtoken ssym;
+ int voidval;
+ struct block *bval;
+ enum exp_opcode opcode;
+ struct internalvar *ivar;
+ struct objc_class_str class;
+
+ struct type **tvec;
+ int *ivec;
+ }
+
+%{
+/* YYSTYPE gets defined by %union */
+static int
+parse_number PARAMS ((char *, int, int, YYSTYPE *));
+%}
+
+%type <voidval> exp exp1 type_exp start variable qualified_name lcurly
+%type <lval> rcurly
+%type <tval> type typebase
+%type <tvec> nonempty_typelist
+/* %type <bval> block */
+
+/* Fancy type parsing. */
+%type <voidval> func_mod direct_abs_decl abs_decl
+%type <tval> ptype
+%type <lval> array_mod
+
+%token <typed_val_int> INT
+%token <typed_val_float> FLOAT
+
+/* Both NAME and TYPENAME tokens represent symbols in the input,
+ and both convey their data as strings.
+ But a TYPENAME is a string that happens to be defined as a typedef
+ or builtin type name (such as int or char)
+ and a NAME is any other symbol.
+ Contexts where this distinction is not important can use the
+ nonterminal "name", which matches either NAME or TYPENAME. */
+
+%token <sval> STRING
+%token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
+%token <sval> SELECTOR /* ObjC "@selector" pseudo-operator */
+%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
+%token <tsym> TYPENAME
+%token <class> CLASSNAME /* ObjC Class name */
+%type <sval> name
+%type <ssym> name_not_typename
+%type <tsym> typename
+
+/* A NAME_OR_INT is a symbol which is not known in the symbol table,
+ but which would parse as a valid number in the current input radix.
+ E.g. "c" when input_radix==16. Depending on the parse, it will be
+ turned into a name or into a number. */
+
+%token <ssym> NAME_OR_INT
+
+%token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
+%token TEMPLATE
+%token ERROR
+
+/* Special type cases, put in to allow the parser to distinguish different
+ legal basetypes. */
+%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
+
+%token <voidval> VARIABLE
+
+%token <opcode> ASSIGN_MODIFY
+
+/* C++ */
+%token THIS
+
+%left ','
+%left ABOVE_COMMA
+%right '=' ASSIGN_MODIFY
+%right '?'
+%left OROR
+%left ANDAND
+%left '|'
+%left '^'
+%left '&'
+%left EQUAL NOTEQUAL
+%left '<' '>' LEQ GEQ
+%left LSH RSH
+%left '@'
+%left '+' '-'
+%left '*' '/' '%'
+%right UNARY INCREMENT DECREMENT
+%right ARROW '.' '[' '('
+%token <ssym> BLOCKNAME
+%type <bval> block
+%left COLONCOLON
+
+
+%%
+
+start : exp1
+ | type_exp
+ ;
+
+type_exp: type
+ { write_exp_elt_opcode(OP_TYPE);
+ write_exp_elt_type($1);
+ write_exp_elt_opcode(OP_TYPE);}
+ ;
+
+/* Expressions, including the comma operator. */
+exp1 : exp
+ | exp1 ',' exp
+ { write_exp_elt_opcode (BINOP_COMMA); }
+ ;
+
+/* Expressions, not including the comma operator. */
+exp : '*' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_IND); }
+
+exp : '&' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_ADDR); }
+
+exp : '-' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_NEG); }
+ ;
+
+exp : '!' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
+ ;
+
+exp : '~' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_COMPLEMENT); }
+ ;
+
+exp : INCREMENT exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_PREINCREMENT); }
+ ;
+
+exp : DECREMENT exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_PREDECREMENT); }
+ ;
+
+exp : exp INCREMENT %prec UNARY
+ { write_exp_elt_opcode (UNOP_POSTINCREMENT); }
+ ;
+
+exp : exp DECREMENT %prec UNARY
+ { write_exp_elt_opcode (UNOP_POSTDECREMENT); }
+ ;
+
+exp : SIZEOF exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_SIZEOF); }
+ ;
+
+exp : exp ARROW name
+ { write_exp_elt_opcode (STRUCTOP_PTR);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_PTR); }
+ ;
+
+exp : exp ARROW qualified_name
+ { /* exp->type::name becomes exp->*(&type::name) */
+ /* Note: this doesn't work if name is a
+ static member! FIXME */
+ write_exp_elt_opcode (UNOP_ADDR);
+ write_exp_elt_opcode (STRUCTOP_MPTR); }
+ ;
+exp : exp ARROW '*' exp
+ { write_exp_elt_opcode (STRUCTOP_MPTR); }
+ ;
+
+exp : exp '.' name
+ { write_exp_elt_opcode (STRUCTOP_STRUCT);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_STRUCT); }
+ ;
+
+
+exp : exp '.' qualified_name
+ { /* exp.type::name becomes exp.*(&type::name) */
+ /* Note: this doesn't work if name is a
+ static member! FIXME */
+ write_exp_elt_opcode (UNOP_ADDR);
+ write_exp_elt_opcode (STRUCTOP_MEMBER); }
+ ;
+
+exp : exp '.' '*' exp
+ { write_exp_elt_opcode (STRUCTOP_MEMBER); }
+ ;
+
+exp : exp '[' exp1 ']'
+ { write_exp_elt_opcode (BINOP_SUBSCRIPT); }
+ ;
+/*
+ * The rules below parse ObjC message calls of the form:
+ * '[' target selector {':' argument}* ']'
+ */
+
+exp : '[' TYPENAME
+ {
+ CORE_ADDR class;
+
+ class = lookup_objc_class (copy_name ($2.stoken));
+ if (class == 0)
+ error ("%s is not an ObjC Class",
+ copy_name ($2.stoken));
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ write_exp_elt_longcst ((LONGEST) class);
+ write_exp_elt_opcode (OP_LONG);
+ start_msglist();
+ }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+exp : '[' CLASSNAME
+ {
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ write_exp_elt_longcst ((LONGEST) $2.class);
+ write_exp_elt_opcode (OP_LONG);
+ start_msglist();
+ }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+exp : '[' exp
+ { start_msglist(); }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+msglist : name
+ { add_msglist(&$1, 0); }
+ | msgarglist
+ ;
+
+msgarglist : msgarg
+ | msgarglist msgarg
+ ;
+
+msgarg : name ':' exp
+ { add_msglist(&$1, 1); }
+ | ':' exp /* unnamed arg */
+ { add_msglist(0, 1); }
+ | ',' exp /* variable number of args */
+ { add_msglist(0, 0); }
+ ;
+
+exp : exp '('
+ /* This is to save the value of arglist_len
+ being accumulated by an outer function call. */
+ { start_arglist (); }
+ arglist ')' %prec ARROW
+ { write_exp_elt_opcode (OP_FUNCALL);
+ write_exp_elt_longcst ((LONGEST) end_arglist ());
+ write_exp_elt_opcode (OP_FUNCALL); }
+ ;
+
+lcurly : '{'
+ { start_arglist (); }
+ ;
+
+arglist :
+ ;
+
+arglist : exp
+ { arglist_len = 1; }
+ ;
+
+arglist : arglist ',' exp %prec ABOVE_COMMA
+ { arglist_len++; }
+ ;
+
+rcurly : '}'
+ { $$ = end_arglist () - 1; }
+ ;
+exp : lcurly arglist rcurly %prec ARROW
+ { write_exp_elt_opcode (OP_ARRAY);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_longcst ((LONGEST) $3);
+ write_exp_elt_opcode (OP_ARRAY); }
+ ;
+
+exp : lcurly type rcurly exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_MEMVAL);
+ write_exp_elt_type ($2);
+ write_exp_elt_opcode (UNOP_MEMVAL); }
+ ;
+
+exp : '(' type ')' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_CAST);
+ write_exp_elt_type ($2);
+ write_exp_elt_opcode (UNOP_CAST); }
+ ;
+
+exp : '(' exp1 ')'
+ { }
+ ;
+
+/* Binary operators in order of decreasing precedence. */
+
+exp : exp '@' exp
+ { write_exp_elt_opcode (BINOP_REPEAT); }
+ ;
+
+exp : exp '*' exp
+ { write_exp_elt_opcode (BINOP_MUL); }
+ ;
+
+exp : exp '/' exp
+ { write_exp_elt_opcode (BINOP_DIV); }
+ ;
+
+exp : exp '%' exp
+ { write_exp_elt_opcode (BINOP_REM); }
+ ;
+
+exp : exp '+' exp
+ { write_exp_elt_opcode (BINOP_ADD); }
+ ;
+
+exp : exp '-' exp
+ { write_exp_elt_opcode (BINOP_SUB); }
+ ;
+
+exp : exp LSH exp
+ { write_exp_elt_opcode (BINOP_LSH); }
+ ;
+
+exp : exp RSH exp
+ { write_exp_elt_opcode (BINOP_RSH); }
+ ;
+
+exp : exp EQUAL exp
+ { write_exp_elt_opcode (BINOP_EQUAL); }
+ ;
+
+exp : exp NOTEQUAL exp
+ { write_exp_elt_opcode (BINOP_NOTEQUAL); }
+ ;
+
+exp : exp LEQ exp
+ { write_exp_elt_opcode (BINOP_LEQ); }
+ ;
+
+exp : exp GEQ exp
+ { write_exp_elt_opcode (BINOP_GEQ); }
+ ;
+
+exp : exp '<' exp
+ { write_exp_elt_opcode (BINOP_LESS); }
+ ;
+
+exp : exp '>' exp
+ { write_exp_elt_opcode (BINOP_GTR); }
+ ;
+
+exp : exp '&' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_AND); }
+ ;
+
+exp : exp '^' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
+ ;
+
+exp : exp '|' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
+ ;
+
+exp : exp ANDAND exp
+ { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
+ ;
+
+exp : exp OROR exp
+ { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
+ ;
+
+exp : exp '?' exp ':' exp %prec '?'
+ { write_exp_elt_opcode (TERNOP_COND); }
+ ;
+
+exp : exp '=' exp
+ { write_exp_elt_opcode (BINOP_ASSIGN); }
+ ;
+
+exp : exp ASSIGN_MODIFY exp
+ { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
+ write_exp_elt_opcode ($2);
+ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
+ ;
+
+exp : INT
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_longcst ((LONGEST)($1.val));
+ write_exp_elt_opcode (OP_LONG); }
+ ;
+
+exp : NAME_OR_INT
+ { YYSTYPE val;
+ parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (val.typed_val_int.type);
+ write_exp_elt_longcst ((LONGEST)val.typed_val_int.val);
+ write_exp_elt_opcode (OP_LONG);
+ }
+ ;
+
+
+exp : FLOAT
+ { write_exp_elt_opcode (OP_DOUBLE);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_dblcst ($1.dval);
+ write_exp_elt_opcode (OP_DOUBLE); }
+ ;
+
+exp : variable
+ ;
+
+exp : VARIABLE
+ /* Already written by write_dollar_variable. */
+ ;
+
+exp : SELECTOR
+ {
+ write_exp_elt_opcode (OP_SELECTOR);
+ write_exp_string ($1);
+ write_exp_elt_opcode (OP_SELECTOR); }
+
+exp : SIZEOF '(' type ')' %prec UNARY
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ CHECK_TYPEDEF ($3);
+ write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
+ write_exp_elt_opcode (OP_LONG); }
+ ;
+
+exp : STRING
+ { /* C strings are converted into array constants with
+ an explicit null byte added at the end. Thus
+ the array upper bound is the string length.
+ There is no such thing in C as a completely empty
+ string. */
+ char *sp = $1.ptr; int count = $1.length;
+ while (count-- > 0)
+ {
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_char);
+ write_exp_elt_longcst ((LONGEST)(*sp++));
+ write_exp_elt_opcode (OP_LONG);
+ }
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_char);
+ write_exp_elt_longcst ((LONGEST)'\0');
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_opcode (OP_ARRAY);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_longcst ((LONGEST) ($1.length));
+ write_exp_elt_opcode (OP_ARRAY); }
+ ;
+
+exp : NSSTRING /* ObjC NextStep NSString constant
+ * of the form '@' '"' string '"'
+ */
+ { write_exp_elt_opcode (OP_NSSTRING);
+ write_exp_string ($1);
+ write_exp_elt_opcode (OP_NSSTRING); }
+ ;
+
+/* C++. */
+exp : THIS
+ { write_exp_elt_opcode (OP_THIS);
+ write_exp_elt_opcode (OP_THIS); }
+ ;
+
+/* end of C++. */
+
+block : BLOCKNAME
+ {
+ if ($1.sym != 0)
+ $$ = SYMBOL_BLOCK_VALUE ($1.sym);
+ else
+ {
+ struct symtab *tem =
+ lookup_symtab (copy_name ($1.stoken));
+ if (tem)
+ $$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), STATIC_BLOCK);
+ else
+ error ("No file or function \"%s\".",
+ copy_name ($1.stoken));
+ }
+ }
+ ;
+
+block : block COLONCOLON name
+ { struct symbol *tem
+ = lookup_symbol (copy_name ($3), $1,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
+ error ("No function \"%s\" in specified context.",
+ copy_name ($3));
+ $$ = SYMBOL_BLOCK_VALUE (tem); }
+ ;
+
+variable: block COLONCOLON name
+ { struct symbol *sym;
+ sym = lookup_symbol (copy_name ($3), $1,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (sym == 0)
+ error ("No symbol \"%s\" in specified context.",
+ copy_name ($3));
+
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ /* block_found is set by lookup_symbol. */
+ write_exp_elt_block (block_found);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE); }
+ ;
+
+qualified_name: typebase COLONCOLON name
+ {
+ struct type *type = $1;
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT
+ && TYPE_CODE (type) != TYPE_CODE_UNION)
+ error ("`%s' is not defined as an aggregate type.",
+ TYPE_NAME (type));
+
+ write_exp_elt_opcode (OP_SCOPE);
+ write_exp_elt_type (type);
+ write_exp_string ($3);
+ write_exp_elt_opcode (OP_SCOPE);
+ }
+ | typebase COLONCOLON '~' name
+ {
+ struct type *type = $1;
+ struct stoken tmp_token;
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT
+ && TYPE_CODE (type) != TYPE_CODE_UNION)
+ error ("`%s' is not defined as an aggregate type.",
+ TYPE_NAME (type));
+
+ if (!STREQ (type_name_no_tag (type), $4.ptr))
+ error ("invalid destructor `%s::~%s'",
+ type_name_no_tag (type), $4.ptr);
+
+ tmp_token.ptr = (char*) alloca ($4.length + 2);
+ tmp_token.length = $4.length + 1;
+ tmp_token.ptr[0] = '~';
+ memcpy (tmp_token.ptr+1, $4.ptr, $4.length);
+ tmp_token.ptr[tmp_token.length] = 0;
+ write_exp_elt_opcode (OP_SCOPE);
+ write_exp_elt_type (type);
+ write_exp_string (tmp_token);
+ write_exp_elt_opcode (OP_SCOPE);
+ }
+ ;
+
+variable: qualified_name
+ | COLONCOLON name
+ {
+ char *name = copy_name ($2);
+ struct symbol *sym;
+ struct minimal_symbol *msymbol;
+
+ sym =
+ lookup_symbol (name, (const struct block *) NULL,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (sym)
+ {
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ write_exp_elt_block (NULL);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ break;
+ }
+
+ msymbol = lookup_minimal_symbol (name, NULL, NULL);
+ if (msymbol != NULL)
+ {
+ write_exp_msymbol (msymbol,
+ lookup_function_type (builtin_type_int),
+ builtin_type_int);
+ }
+ else
+ if (!have_full_symbols () && !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
+ else
+ error ("No symbol \"%s\" in current context.", name);
+ }
+ ;
+
+variable: name_not_typename
+ { struct symbol *sym = $1.sym;
+
+ if (sym)
+ {
+ if (symbol_read_needs_frame (sym))
+ {
+ if (innermost_block == 0 ||
+ contained_in (block_found,
+ innermost_block))
+ innermost_block = block_found;
+ }
+
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ /* We want to use the selected frame, not
+ another more inner frame which happens to
+ be in the same block. */
+ write_exp_elt_block (NULL);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ }
+ else if ($1.is_a_field_of_this)
+ {
+ /* C++/ObjC: it hangs off of `this'/'self'.
+ Must not inadvertently convert from a
+ method call to data ref. */
+ if (innermost_block == 0 ||
+ contained_in (block_found, innermost_block))
+ innermost_block = block_found;
+ write_exp_elt_opcode (OP_SELF);
+ write_exp_elt_opcode (OP_SELF);
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ write_exp_string ($1.stoken);
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ }
+ else
+ {
+ struct minimal_symbol *msymbol;
+ register char *arg = copy_name ($1.stoken);
+
+ msymbol =
+ lookup_minimal_symbol (arg, NULL, NULL);
+ if (msymbol != NULL)
+ {
+ write_exp_msymbol (msymbol,
+ lookup_function_type (builtin_type_int),
+ builtin_type_int);
+ }
+ else if (!have_full_symbols () &&
+ !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
+ else
+ error ("No symbol \"%s\" in current context.",
+ copy_name ($1.stoken));
+ }
+ }
+ ;
+
+
+ptype : typebase
+ /* "const" and "volatile" are curently ignored. A type qualifier
+ before the type is currently handled in the typebase rule.
+ The reason for recognizing these here (shift/reduce conflicts)
+ might be obsolete now that some pointer to member rules have
+ been deleted. */
+ | typebase CONST_KEYWORD
+ | typebase VOLATILE_KEYWORD
+ | typebase abs_decl
+ { $$ = follow_types ($1); }
+ | typebase CONST_KEYWORD abs_decl
+ { $$ = follow_types ($1); }
+ | typebase VOLATILE_KEYWORD abs_decl
+ { $$ = follow_types ($1); }
+ ;
+
+abs_decl: '*'
+ { push_type (tp_pointer); $$ = 0; }
+ | '*' abs_decl
+ { push_type (tp_pointer); $$ = $2; }
+ | '&'
+ { push_type (tp_reference); $$ = 0; }
+ | '&' abs_decl
+ { push_type (tp_reference); $$ = $2; }
+ | direct_abs_decl
+ ;
+
+direct_abs_decl: '(' abs_decl ')'
+ { $$ = $2; }
+ | direct_abs_decl array_mod
+ {
+ push_type_int ($2);
+ push_type (tp_array);
+ }
+ | array_mod
+ {
+ push_type_int ($1);
+ push_type (tp_array);
+ $$ = 0;
+ }
+
+ | direct_abs_decl func_mod
+ { push_type (tp_function); }
+ | func_mod
+ { push_type (tp_function); }
+ ;
+
+array_mod: '[' ']'
+ { $$ = -1; }
+ | '[' INT ']'
+ { $$ = $2.val; }
+ ;
+
+func_mod: '(' ')'
+ { $$ = 0; }
+ | '(' nonempty_typelist ')'
+ { free ((PTR)$2); $$ = 0; }
+ ;
+
+/* We used to try to recognize more pointer to member types here, but
+ that didn't work (shift/reduce conflicts meant that these rules never
+ got executed). The problem is that
+ int (foo::bar::baz::bizzle)
+ is a function type but
+ int (foo::bar::baz::bizzle::*)
+ is a pointer to member type. Stroustrup loses again! */
+
+type : ptype
+ | typebase COLONCOLON '*'
+ { $$ = lookup_member_type (builtin_type_int, $1); }
+ ;
+
+typebase /* Implements (approximately): (type-qualifier)* type-specifier */
+ : TYPENAME
+ { $$ = $1.type; }
+ | CLASSNAME
+ {
+ if ($1.type == NULL)
+ error ("No symbol \"%s\" in current context.",
+ copy_name($1.stoken));
+ else
+ $$ = $1.type;
+ }
+ | INT_KEYWORD
+ { $$ = builtin_type_int; }
+ | LONG
+ { $$ = builtin_type_long; }
+ | SHORT
+ { $$ = builtin_type_short; }
+ | LONG INT_KEYWORD
+ { $$ = builtin_type_long; }
+ | UNSIGNED LONG INT_KEYWORD
+ { $$ = builtin_type_unsigned_long; }
+ | LONG LONG
+ { $$ = builtin_type_long_long; }
+ | LONG LONG INT_KEYWORD
+ { $$ = builtin_type_long_long; }
+ | UNSIGNED LONG LONG
+ { $$ = builtin_type_unsigned_long_long; }
+ | UNSIGNED LONG LONG INT_KEYWORD
+ { $$ = builtin_type_unsigned_long_long; }
+ | SHORT INT_KEYWORD
+ { $$ = builtin_type_short; }
+ | UNSIGNED SHORT INT_KEYWORD
+ { $$ = builtin_type_unsigned_short; }
+ | DOUBLE_KEYWORD
+ { $$ = builtin_type_double; }
+ | LONG DOUBLE_KEYWORD
+ { $$ = builtin_type_long_double; }
+ | STRUCT name
+ { $$ = lookup_struct (copy_name ($2),
+ expression_context_block); }
+ | CLASS name
+ { $$ = lookup_struct (copy_name ($2),
+ expression_context_block); }
+ | UNION name
+ { $$ = lookup_union (copy_name ($2),
+ expression_context_block); }
+ | ENUM name
+ { $$ = lookup_enum (copy_name ($2),
+ expression_context_block); }
+ | UNSIGNED typename
+ { $$ = lookup_unsigned_typename (TYPE_NAME($2.type)); }
+ | UNSIGNED
+ { $$ = builtin_type_unsigned_int; }
+ | SIGNED_KEYWORD typename
+ { $$ = lookup_signed_typename (TYPE_NAME($2.type)); }
+ | SIGNED_KEYWORD
+ { $$ = builtin_type_int; }
+ | TEMPLATE name '<' type '>'
+ { $$ = lookup_template_type(copy_name($2), $4,
+ expression_context_block);
+ }
+ /* "const" and "volatile" are curently ignored. A type qualifier
+ after the type is handled in the ptype rule. I think these could
+ be too. */
+ | CONST_KEYWORD typebase { $$ = $2; }
+ | VOLATILE_KEYWORD typebase { $$ = $2; }
+ ;
+
+typename: TYPENAME
+ | INT_KEYWORD
+ {
+ $$.stoken.ptr = "int";
+ $$.stoken.length = 3;
+ $$.type = builtin_type_int;
+ }
+ | LONG
+ {
+ $$.stoken.ptr = "long";
+ $$.stoken.length = 4;
+ $$.type = builtin_type_long;
+ }
+ | SHORT
+ {
+ $$.stoken.ptr = "short";
+ $$.stoken.length = 5;
+ $$.type = builtin_type_short;
+ }
+ ;
+
+nonempty_typelist
+ : type
+ { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
+ $<ivec>$[0] = 1; /* Number of types in vector */
+ $$[1] = $1;
+ }
+ | nonempty_typelist ',' type
+ { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
+ $$ = (struct type **) realloc ((char *) $1, len);
+ $$[$<ivec>$[0]] = $3;
+ }
+ ;
+
+name : NAME { $$ = $1.stoken; }
+ | BLOCKNAME { $$ = $1.stoken; }
+ | TYPENAME { $$ = $1.stoken; }
+ | CLASSNAME { $$ = $1.stoken; }
+ | NAME_OR_INT { $$ = $1.stoken; }
+ ;
+
+name_not_typename : NAME
+ | BLOCKNAME
+/* These would be useful if name_not_typename was useful, but it is just
+ a fake for "variable", so these cause reduce/reduce conflicts because
+ the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
+ =exp) or just an exp. If name_not_typename was ever used in an lvalue
+ context where only a name could occur, this might be useful.
+ | NAME_OR_INT
+ */
+ ;
+
+%%
+
+/* Take care of parsing a number (anything that starts with a digit).
+ Set yylval and return the token type; update lexptr.
+ LEN is the number of characters in it. */
+
+/*** Needs some error checking for the float case ***/
+
+static int
+parse_number (p, len, parsed_float, putithere)
+ register char *p;
+ register int len;
+ int parsed_float;
+ YYSTYPE *putithere;
+{
+ /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
+ here, and we do kind of silly things like cast to unsigned. */
+ register LONGEST n = 0;
+ register LONGEST prevn = 0;
+ unsigned LONGEST un;
+
+ register int i = 0;
+ register int c;
+ register int base = input_radix;
+ int unsigned_p = 0;
+
+ /* Number of "L" suffixes encountered. */
+ int long_p = 0;
+
+ /* We have found a "L" or "U" suffix. */
+ int found_suffix = 0;
+
+ unsigned LONGEST high_bit;
+ struct type *signed_type;
+ struct type *unsigned_type;
+
+ if (parsed_float)
+ {
+ char c;
+
+ /* It's a float since it contains a point or an exponent. */
+
+ if (sizeof (putithere->typed_val_float.dval) <= sizeof (float))
+ sscanf (p, "%g", &putithere->typed_val_float.dval);
+ else if (sizeof (putithere->typed_val_float.dval) <= sizeof (double))
+ sscanf (p, "%lg", &putithere->typed_val_float.dval);
+ else
+ {
+#ifdef PRINTF_HAS_LONG_DOUBLE
+ sscanf (p, "%Lg", &putithere->typed_val_float.dval);
+#else
+ /* Scan it into a double, then assign it to the long double.
+ This at least wins with values representable in the range
+ of doubles. */
+ double temp;
+ sscanf (p, "%lg", &temp);
+ putithere->typed_val_float.dval = temp;
+#endif
+ }
+
+ /* See if it has `f' or `l' suffix (float or long double). */
+
+ c = tolower (p[len - 1]);
+
+ if (c == 'f')
+ putithere->typed_val_float.type = builtin_type_float;
+ else if (c == 'l')
+ putithere->typed_val_float.type = builtin_type_long_double;
+ else if (isdigit (c) || c == '.')
+ putithere->typed_val_float.type = builtin_type_double;
+ else
+ return ERROR;
+
+ return FLOAT;
+ }
+
+ /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
+ if (p[0] == '0')
+ switch (p[1])
+ {
+ case 'x':
+ case 'X':
+ if (len >= 3)
+ {
+ p += 2;
+ base = 16;
+ len -= 2;
+ }
+ break;
+
+ case 't':
+ case 'T':
+ case 'd':
+ case 'D':
+ if (len >= 3)
+ {
+ p += 2;
+ base = 10;
+ len -= 2;
+ }
+ break;
+
+ default:
+ base = 8;
+ break;
+ }
+
+ while (len-- > 0)
+ {
+ c = *p++;
+ if (c >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ if (c != 'l' && c != 'u')
+ n *= base;
+ if (c >= '0' && c <= '9')
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - '0';
+ }
+ else
+ {
+ if (base > 10 && c >= 'a' && c <= 'f')
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - 'a' + 10;
+ }
+ else if (c == 'l')
+ {
+ ++long_p;
+ found_suffix = 1;
+ }
+ else if (c == 'u')
+ {
+ unsigned_p = 1;
+ found_suffix = 1;
+ }
+ else
+ return ERROR; /* Char not a digit */
+ }
+ if (i >= base)
+ return ERROR; /* Invalid digit in this base */
+
+ /* Portably test for overflow (only works for nonzero values, so make
+ a second check for zero). FIXME: Can't we just make n and prevn
+ unsigned and avoid this? */
+ if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
+ unsigned_p = 1; /* Try something unsigned */
+
+ /* Portably test for unsigned overflow.
+ FIXME: This check is wrong; for example it doesn't find overflow
+ on 0x123456789 when LONGEST is 32 bits. */
+ if (c != 'l' && c != 'u' && n != 0)
+ {
+ if ((unsigned_p && (unsigned LONGEST) prevn >= (unsigned LONGEST) n))
+ error ("Numeric constant too large.");
+ }
+ prevn = n;
+ }
+
+ /* An integer constant is an int, a long, or a long long. An L
+ suffix forces it to be long; an LL suffix forces it to be long
+ long. If not forced to a larger size, it gets the first type of
+ the above that it fits in. To figure out whether it fits, we
+ shift it right and see whether anything remains. Note that we
+ can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
+ operation, because many compilers will warn about such a shift
+ (which always produces a zero result). Sometimes TARGET_INT_BIT
+ or TARGET_LONG_BIT will be that big, sometimes not. To deal with
+ the case where it is we just always shift the value more than
+ once, with fewer bits each time. */
+
+ un = (unsigned LONGEST)n >> 2;
+ if (long_p == 0
+ && (un >> (TARGET_INT_BIT - 2)) == 0)
+ {
+ high_bit = ((unsigned LONGEST)1) << (TARGET_INT_BIT-1);
+
+ /* A large decimal (not hex or octal) constant (between INT_MAX
+ and UINT_MAX) is a long or unsigned long, according to ANSI,
+ never an unsigned int, but this code treats it as unsigned
+ int. This probably should be fixed. GCC gives a warning on
+ such constants. */
+
+ unsigned_type = builtin_type_unsigned_int;
+ signed_type = builtin_type_int;
+ }
+ else if (long_p <= 1
+ && (un >> (TARGET_LONG_BIT - 2)) == 0)
+ {
+ high_bit = ((unsigned LONGEST)1) << (TARGET_LONG_BIT-1);
+ unsigned_type = builtin_type_unsigned_long;
+ signed_type = builtin_type_long;
+ }
+ else
+ {
+ high_bit = (((unsigned LONGEST)1)
+ << (TARGET_LONG_LONG_BIT - 32 - 1)
+ << 16
+ << 16);
+ if (high_bit == 0)
+ /* A long long does not fit in a LONGEST. */
+ high_bit =
+ (unsigned LONGEST)1 << (sizeof (LONGEST) * HOST_CHAR_BIT - 1);
+ unsigned_type = builtin_type_unsigned_long_long;
+ signed_type = builtin_type_long_long;
+ }
+
+ putithere->typed_val_int.val = n;
+
+ /* If the high bit of the worked out type is set then this number
+ has to be unsigned. */
+
+ if (unsigned_p || (n & high_bit))
+ {
+ putithere->typed_val_int.type = unsigned_type;
+ }
+ else
+ {
+ putithere->typed_val_int.type = signed_type;
+ }
+
+ return INT;
+}
+
+struct token
+{
+ char *operator;
+ int token;
+ enum exp_opcode opcode;
+};
+
+static const struct token tokentab3[] =
+ {
+ {">>=", ASSIGN_MODIFY, BINOP_RSH},
+ {"<<=", ASSIGN_MODIFY, BINOP_LSH}
+ };
+
+static const struct token tokentab2[] =
+ {
+ {"+=", ASSIGN_MODIFY, BINOP_ADD},
+ {"-=", ASSIGN_MODIFY, BINOP_SUB},
+ {"*=", ASSIGN_MODIFY, BINOP_MUL},
+ {"/=", ASSIGN_MODIFY, BINOP_DIV},
+ {"%=", ASSIGN_MODIFY, BINOP_REM},
+ {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR},
+ {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND},
+ {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR},
+ {"++", INCREMENT, BINOP_END},
+ {"--", DECREMENT, BINOP_END},
+ {"->", ARROW, BINOP_END},
+ {"&&", ANDAND, BINOP_END},
+ {"||", OROR, BINOP_END},
+ {"::", COLONCOLON, BINOP_END},
+ {"<<", LSH, BINOP_END},
+ {">>", RSH, BINOP_END},
+ {"==", EQUAL, BINOP_END},
+ {"!=", NOTEQUAL, BINOP_END},
+ {"<=", LEQ, BINOP_END},
+ {">=", GEQ, BINOP_END}
+ };
+
+/* Read one token, getting characters through lexptr. */
+
+static int
+yylex ()
+{
+ int c, tokchr;
+ int namelen;
+ unsigned int i;
+ char *tokstart;
+ char *tokptr;
+ int tempbufindex;
+ static char *tempbuf;
+ static int tempbufsize;
+
+ retry:
+
+ tokstart = lexptr;
+ /* See if it is a special token of length 3. */
+ for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
+ if (STREQN (tokstart, tokentab3[i].operator, 3))
+ {
+ lexptr += 3;
+ yylval.opcode = tokentab3[i].opcode;
+ return tokentab3[i].token;
+ }
+
+ /* See if it is a special token of length 2. */
+ for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
+ if (STREQN (tokstart, tokentab2[i].operator, 2))
+ {
+ lexptr += 2;
+ yylval.opcode = tokentab2[i].opcode;
+ return tokentab2[i].token;
+ }
+
+ switch (tokchr = *tokstart)
+ {
+ case 0:
+ return 0;
+
+ case ' ':
+ case '\t':
+ case '\n':
+ lexptr++;
+ goto retry;
+
+ case '\'':
+ /* We either have a character constant ('0' or '\177' for example)
+ or we have a quoted symbol reference ('foo(int,int)' in C++
+ for example). */
+ lexptr++;
+ c = *lexptr++;
+ if (c == '\\')
+ c = parse_escape (&lexptr);
+ else if (c == '\'')
+ error ("Empty character constant.");
+
+ yylval.typed_val_int.val = c;
+ yylval.typed_val_int.type = builtin_type_char;
+
+ c = *lexptr++;
+ if (c != '\'')
+ {
+ namelen = skip_quoted (tokstart,
+ get_gdb_completer_word_break_characters())
+ - tokstart;
+ if (namelen > 2)
+ {
+ lexptr = tokstart + namelen;
+ if (lexptr[-1] != '\'')
+ error ("Unmatched single quote.");
+ namelen -= 2;
+ tokstart++;
+ goto tryname;
+ }
+ error ("Invalid character constant.");
+ }
+ return INT;
+
+ case '(':
+ paren_depth++;
+ lexptr++;
+ return '(';
+
+ case ')':
+ if (paren_depth == 0)
+ return 0;
+ paren_depth--;
+ lexptr++;
+ return ')';
+
+ case ',':
+ if (comma_terminates && paren_depth == 0)
+ return 0;
+ lexptr++;
+ return ',';
+
+ case '.':
+ /* Might be a floating point number. */
+ if (lexptr[1] < '0' || lexptr[1] > '9')
+ goto symbol; /* Nope, must be a symbol. */
+ /* FALL THRU into number case. */
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+ /* It's a number. */
+ int got_dot = 0, got_e = 0, toktype = FLOAT;
+ /* initialize toktype to anything other than ERROR. */
+ register char *p = tokstart;
+ int hex = input_radix > 10;
+ int local_radix = input_radix;
+ if (tokchr == '0' && (p[1] == 'x' || p[1] == 'X'))
+ {
+ p += 2;
+ hex = 1;
+ local_radix = 16;
+ }
+ else if (tokchr == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
+ {
+ p += 2;
+ hex = 0;
+ local_radix = 10;
+ }
+
+ for (;; ++p)
+ {
+ /* This test includes !hex because 'e' is a valid hex digit
+ and thus does not indicate a floating point number when
+ the radix is hex. */
+
+ if (!hex && (*p == 'e' || *p == 'E'))
+ if (got_e)
+ toktype = ERROR; /* only one 'e' in a float */
+ else
+ got_e = 1;
+ /* This test does not include !hex, because a '.' always indicates
+ a decimal floating point number regardless of the radix. */
+ else if (*p == '.')
+ if (got_dot)
+ toktype = ERROR; /* only one '.' in a float */
+ else
+ got_dot = 1;
+ else if (got_e && (p[-1] == 'e' || p[-1] == 'E') &&
+ (*p == '-' || *p == '+'))
+ /* This is the sign of the exponent, not the end of the
+ number. */
+ continue;
+ /* Always take decimal digits; parse_number handles radix error */
+ else if (*p >= '0' && *p <= '9')
+ continue;
+ /* We will take letters only if hex is true, and only
+ up to what the input radix would permit. FSF was content
+ to rely on parse_number to validate; but it leaks. */
+ else if (*p >= 'a' && *p <= 'z') {
+ if (!hex || *p >= ('a' + local_radix - 10))
+ toktype = ERROR;
+ }
+ else if (*p >= 'A' && *p <= 'Z') {
+ if (!hex || *p >= ('A' + local_radix - 10))
+ toktype = ERROR;
+ }
+ else break;
+ }
+ if (toktype != ERROR)
+ toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval);
+ if (toktype == ERROR)
+ {
+ char *err_copy = (char *) alloca (p - tokstart + 1);
+
+ memcpy (err_copy, tokstart, p - tokstart);
+ err_copy[p - tokstart] = 0;
+ error ("Invalid number \"%s\".", err_copy);
+ }
+ lexptr = p;
+ return toktype;
+ }
+
+ case '+':
+ case '-':
+ case '*':
+ case '/':
+ case '%':
+ case '|':
+ case '&':
+ case '^':
+ case '~':
+ case '!':
+#if 0
+ case '@': /* moved out below */
+#endif
+ case '<':
+ case '>':
+ case '[':
+ case ']':
+ case '?':
+ case ':':
+ case '=':
+ case '{':
+ case '}':
+ symbol:
+ lexptr++;
+ return tokchr;
+
+ case '@':
+ if (strncmp(tokstart, "@selector", 9) == 0)
+ {
+ tokptr = strchr(tokstart, '(');
+ if (tokptr == NULL)
+ {
+ error ("Missing '(' in @selector(...)");
+ }
+ tempbufindex = 0;
+ tokptr++; /* skip the '(' */
+ do {
+ /* Grow the static temp buffer if necessary, including allocating
+ the first one on demand. */
+ if (tempbufindex + 1 >= tempbufsize)
+ {
+ tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
+ }
+ tempbuf[tempbufindex++] = *tokptr++;
+ } while ((*tokptr != ')') && (*tokptr != '\0'));
+ if (*tokptr++ != ')')
+ {
+ error ("Missing ')' in @selector(...)");
+ }
+ tempbuf[tempbufindex] = '\0';
+ yylval.sval.ptr = tempbuf;
+ yylval.sval.length = tempbufindex;
+ lexptr = tokptr;
+ return SELECTOR;
+ }
+ if (tokstart[1] != '"')
+ {
+ lexptr++;
+ return tokchr;
+ }
+ /* ObjC NextStep NSString constant: fall thru and parse like STRING */
+ tokstart++;
+
+ case '"':
+
+ /* Build the gdb internal form of the input string in tempbuf,
+ translating any standard C escape forms seen. Note that the
+ buffer is null byte terminated *only* for the convenience of
+ debugging gdb itself and printing the buffer contents when
+ the buffer contains no embedded nulls. Gdb does not depend
+ upon the buffer being null byte terminated, it uses the length
+ string instead. This allows gdb to handle C strings (as well
+ as strings in other languages) with embedded null bytes */
+
+ tokptr = ++tokstart;
+ tempbufindex = 0;
+
+ do {
+ /* Grow the static temp buffer if necessary, including allocating
+ the first one on demand. */
+ if (tempbufindex + 1 >= tempbufsize)
+ {
+ tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
+ }
+ switch (*tokptr)
+ {
+ case '\0':
+ case '"':
+ /* Do nothing, loop will terminate. */
+ break;
+ case '\\':
+ tokptr++;
+ c = parse_escape (&tokptr);
+ if (c == -1)
+ {
+ continue;
+ }
+ tempbuf[tempbufindex++] = c;
+ break;
+ default:
+ tempbuf[tempbufindex++] = *tokptr++;
+ break;
+ }
+ } while ((*tokptr != '"') && (*tokptr != '\0'));
+ if (*tokptr++ != '"')
+ {
+ error ("Unterminated string in expression.");
+ }
+ tempbuf[tempbufindex] = '\0'; /* See note above */
+ yylval.sval.ptr = tempbuf;
+ yylval.sval.length = tempbufindex;
+ lexptr = tokptr;
+ return (tokchr == '@' ? NSSTRING : STRING);
+ }
+
+ if (!(tokchr == '_' || tokchr == '$' ||
+ (tokchr >= 'a' && tokchr <= 'z') || (tokchr >= 'A' && tokchr <= 'Z')))
+ /* We must have come across a bad character (e.g. ';'). */
+ error ("Invalid character '%c' in expression.", c);
+
+ /* It's a name. See how long it is. */
+ namelen = 0;
+ for (c = tokstart[namelen];
+ (c == '_' || c == '$' || (c >= '0' && c <= '9')
+ || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
+ {
+ if (c == '<')
+ {
+ int i = namelen;
+ while (tokstart[++i] && tokstart[i] != '>');
+ if (tokstart[i] == '>')
+ namelen = i;
+ }
+ c = tokstart[++namelen];
+ }
+
+ /* The token "if" terminates the expression and is NOT
+ removed from the input stream. */
+ if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
+ {
+ return 0;
+ }
+
+ lexptr += namelen;
+
+ tryname:
+
+ /* Catch specific keywords. Should be done with a data structure. */
+ switch (namelen)
+ {
+ case 8:
+ if (STREQN (tokstart, "unsigned", 8))
+ return UNSIGNED;
+ if (current_language->la_language == language_cplus
+ && STREQN (tokstart, "template", 8))
+ return TEMPLATE;
+ if (STREQN (tokstart, "volatile", 8))
+ return VOLATILE_KEYWORD;
+ break;
+ case 6:
+ if (STREQN (tokstart, "struct", 6))
+ return STRUCT;
+ if (STREQN (tokstart, "signed", 6))
+ return SIGNED_KEYWORD;
+ if (STREQN (tokstart, "sizeof", 6))
+ return SIZEOF;
+ if (STREQN (tokstart, "double", 6))
+ return DOUBLE_KEYWORD;
+ break;
+ case 5:
+ if ((current_language->la_language == language_cplus)
+ && STREQN (tokstart, "class", 5))
+ return CLASS;
+ if (STREQN (tokstart, "union", 5))
+ return UNION;
+ if (STREQN (tokstart, "short", 5))
+ return SHORT;
+ if (STREQN (tokstart, "const", 5))
+ return CONST_KEYWORD;
+ break;
+ case 4:
+ if (STREQN (tokstart, "enum", 4))
+ return ENUM;
+ if (STREQN (tokstart, "long", 4))
+ return LONG;
+ if (current_language->la_language == language_cplus
+ && STREQN (tokstart, "this", 4))
+ {
+ static const char this_name[] =
+ { CPLUS_MARKER, 't', 'h', 'i', 's', '\0' };
+
+ if (lookup_symbol (this_name, expression_context_block,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL))
+ return THIS;
+ }
+ break;
+ case 3:
+ if (STREQN (tokstart, "int", 3))
+ return INT_KEYWORD;
+ break;
+ default:
+ break;
+ }
+
+ yylval.sval.ptr = tokstart;
+ yylval.sval.length = namelen;
+
+ if (*tokstart == '$')
+ {
+ write_dollar_variable (yylval.sval);
+ return VARIABLE;
+ }
+
+ /* Use token-type BLOCKNAME for symbols that happen to be defined as
+ functions or symtabs. If this is not so, then ...
+ Use token-type TYPENAME for symbols that happen to be defined
+ currently as names of types; NAME for other symbols.
+ The caller is not constrained to care about the distinction. */
+ {
+ char *tmp = copy_name (yylval.sval);
+ struct symbol *sym;
+ int is_a_field_of_this = 0, *need_this;
+ int hextype;
+
+ if (current_language->la_language == language_cplus ||
+ current_language->la_language == language_objc)
+ need_this = &is_a_field_of_this;
+ else
+ need_this = (int *) NULL;
+
+ sym = lookup_symbol (tmp, expression_context_block,
+ VAR_NAMESPACE,
+ need_this,
+ (struct symtab **) NULL);
+ /* Call lookup_symtab, not lookup_partial_symtab, in case there are
+ no psymtabs (coff, xcoff, or some future change to blow away the
+ psymtabs once symbols are read). */
+ if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) ||
+ lookup_symtab (tmp))
+ {
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return BLOCKNAME;
+ }
+ if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
+ {
+#if 1
+ /* Despite the following flaw, we need to keep this code enabled.
+ Because we can get called from check_stub_method, if we don't
+ handle nested types then it screws many operations in any
+ program which uses nested types. */
+ /* In "A::x", if x is a member function of A and there happens
+ to be a type (nested or not, since the stabs don't make that
+ distinction) named x, then this code incorrectly thinks we
+ are dealing with nested types rather than a member function. */
+
+ char *p;
+ char *namestart;
+ struct symbol *best_sym;
+
+ /* Look ahead to detect nested types. This probably should be
+ done in the grammar, but trying seemed to introduce a lot
+ of shift/reduce and reduce/reduce conflicts. It's possible
+ that it could be done, though. Or perhaps a non-grammar, but
+ less ad hoc, approach would work well. */
+
+ /* Since we do not currently have any way of distinguishing
+ a nested type from a non-nested one (the stabs don't tell
+ us whether a type is nested), we just ignore the
+ containing type. */
+
+ p = lexptr;
+ best_sym = sym;
+ while (1)
+ {
+ /* Skip whitespace. */
+ while (*p == ' ' || *p == '\t' || *p == '\n')
+ ++p;
+ if (*p == ':' && p[1] == ':')
+ {
+ /* Skip the `::'. */
+ p += 2;
+ /* Skip whitespace. */
+ while (*p == ' ' || *p == '\t' || *p == '\n')
+ ++p;
+ namestart = p;
+ while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
+ || (*p >= 'a' && *p <= 'z')
+ || (*p >= 'A' && *p <= 'Z'))
+ ++p;
+ if (p != namestart)
+ {
+ struct symbol *cur_sym;
+ /* As big as the whole rest of the expression, which is
+ at least big enough. */
+ char *ncopy = alloca (strlen (tmp)+strlen (namestart)+3);
+ char *tmp1;
+
+ tmp1 = ncopy;
+ memcpy (tmp1, tmp, strlen (tmp));
+ tmp1 += strlen (tmp);
+ memcpy (tmp1, "::", 2);
+ tmp1 += 2;
+ memcpy (tmp1, namestart, p - namestart);
+ tmp1[p - namestart] = '\0';
+ cur_sym = lookup_symbol (ncopy, expression_context_block,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (cur_sym)
+ {
+ if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
+ {
+ best_sym = cur_sym;
+ lexptr = p;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+
+ yylval.tsym.type = SYMBOL_TYPE (best_sym);
+#else /* not 0 */
+ yylval.tsym.type = SYMBOL_TYPE (sym);
+#endif /* not 0 */
+ return TYPENAME;
+ }
+ if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
+ return TYPENAME;
+
+ if (!sym) /* see if it's an ObjC classname */
+ {
+ CORE_ADDR Class = lookup_objc_class(tmp);
+ if (Class)
+ {
+ extern struct symbol *lookup_struct_typedef();
+ yylval.class.class = Class;
+ if ((sym = lookup_struct_typedef (tmp, expression_context_block, 1)))
+ yylval.class.type = SYMBOL_TYPE (sym);
+ return CLASSNAME;
+ }
+ }
+
+ /* Input names that aren't symbols but ARE valid hex numbers,
+ when the input radix permits them, can be names or numbers
+ depending on the parse. Note we support radixes > 16 here. */
+ if (!sym &&
+ ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) ||
+ (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
+ {
+ YYSTYPE newlval; /* Its value is ignored. */
+ hextype = parse_number (tokstart, namelen, 0, &newlval);
+ if (hextype == INT)
+ {
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME_OR_INT;
+ }
+ }
+
+ /* Any other kind of symbol */
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME;
+ }
+}
+
+void
+yyerror (msg)
+ char *msg;
+{
+ if (*lexptr == '\0')
+ error("A %s near end of expression.", (msg ? msg : "error"));
+ else
+ error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);
+}