/* Separate lexical analyzer for GNU C++. Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. Hacked by Michael Tiemann (tiemann@cygnus.com) This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* This file is the lexical analyzer for GNU C++. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "input.h" #include "tree.h" #include "cp-tree.h" #include "cpplib.h" #include "flags.h" #include "c-pragma.h" #include "toplev.h" #include "output.h" #include "tm_p.h" #include "timevar.h" static int interface_strcmp (const char *); static void init_cp_pragma (void); static tree parse_strconst_pragma (const char *, int); static void handle_pragma_vtable (cpp_reader *); static void handle_pragma_unit (cpp_reader *); static void handle_pragma_interface (cpp_reader *); static void handle_pragma_implementation (cpp_reader *); static void handle_pragma_java_exceptions (cpp_reader *); static void init_operators (void); static void copy_lang_type (tree); /* A constraint that can be tested at compile time. */ #define CONSTRAINT(name, expr) extern int constraint_##name [(expr) ? 1 : -1] /* 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 { const char *filename; struct impl_files *next; }; static struct impl_files *impl_file_chain; 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. */ void cxx_finish (void) { c_common_finish (); } /* A mapping from tree codes to operator name information. */ operator_name_info_t operator_name_info[(int) LAST_CPLUS_TREE_CODE]; /* Similar, but for assignment operators. */ operator_name_info_t assignment_operator_name_info[(int) LAST_CPLUS_TREE_CODE]; /* Initialize data structures that keep track of operator names. */ #define DEF_OPERATOR(NAME, C, M, AR, AP) \ CONSTRAINT (C, sizeof "operator " + sizeof NAME <= 256); #include "operators.def" #undef DEF_OPERATOR static void init_operators (void) { tree identifier; char buffer[256]; struct operator_name_info_t *oni; #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \ sprintf (buffer, ISALPHA (NAME[0]) ? "operator %s" : "operator%s", NAME); \ identifier = get_identifier (buffer); \ IDENTIFIER_OPNAME_P (identifier) = 1; \ \ oni = (ASSN_P \ ? &assignment_operator_name_info[(int) CODE] \ : &operator_name_info[(int) CODE]); \ oni->identifier = identifier; \ oni->name = NAME; \ oni->mangled_name = MANGLING; \ oni->arity = ARITY; #include "operators.def" #undef DEF_OPERATOR operator_name_info[(int) ERROR_MARK].identifier = get_identifier (""); /* Handle some special cases. These operators are not defined in the language, but can be produced internally. We may need them for error-reporting. (Eventually, we should ensure that this does not happen. Error messages involving these operators will be confusing to users.) */ operator_name_info [(int) INIT_EXPR].name = operator_name_info [(int) MODIFY_EXPR].name; operator_name_info [(int) EXACT_DIV_EXPR].name = "(ceiling /)"; operator_name_info [(int) CEIL_DIV_EXPR].name = "(ceiling /)"; operator_name_info [(int) FLOOR_DIV_EXPR].name = "(floor /)"; operator_name_info [(int) ROUND_DIV_EXPR].name = "(round /)"; operator_name_info [(int) CEIL_MOD_EXPR].name = "(ceiling %)"; operator_name_info [(int) FLOOR_MOD_EXPR].name = "(floor %)"; operator_name_info [(int) ROUND_MOD_EXPR].name = "(round %)"; operator_name_info [(int) ABS_EXPR].name = "abs"; operator_name_info [(int) TRUTH_AND_EXPR].name = "strict &&"; operator_name_info [(int) TRUTH_OR_EXPR].name = "strict ||"; operator_name_info [(int) RANGE_EXPR].name = "..."; operator_name_info [(int) CONVERT_EXPR].name = "+"; assignment_operator_name_info [(int) EXACT_DIV_EXPR].name = "(exact /=)"; assignment_operator_name_info [(int) CEIL_DIV_EXPR].name = "(ceiling /=)"; assignment_operator_name_info [(int) FLOOR_DIV_EXPR].name = "(floor /=)"; assignment_operator_name_info [(int) ROUND_DIV_EXPR].name = "(round /=)"; assignment_operator_name_info [(int) CEIL_MOD_EXPR].name = "(ceiling %=)"; assignment_operator_name_info [(int) FLOOR_MOD_EXPR].name = "(floor %=)"; assignment_operator_name_info [(int) ROUND_MOD_EXPR].name = "(round %=)"; } /* The reserved keyword table. */ struct resword { const char *const word; ENUM_BITFIELD(rid) const rid : 16; const unsigned int disable : 16; }; /* Disable mask. Keywords are disabled if (reswords[i].disable & mask) is _true_. */ #define D_EXT 0x01 /* GCC extension */ #define D_ASM 0x02 /* in C99, but has a switch to turn it off */ CONSTRAINT(ridbits_fit, RID_LAST_MODIFIER < sizeof(unsigned long) * CHAR_BIT); static const struct resword reswords[] = { { "_Complex", RID_COMPLEX, 0 }, { "__FUNCTION__", RID_FUNCTION_NAME, 0 }, { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 }, { "__alignof", RID_ALIGNOF, 0 }, { "__alignof__", RID_ALIGNOF, 0 }, { "__asm", RID_ASM, 0 }, { "__asm__", RID_ASM, 0 }, { "__attribute", RID_ATTRIBUTE, 0 }, { "__attribute__", RID_ATTRIBUTE, 0 }, { "__builtin_offsetof", RID_OFFSETOF, 0 }, { "__builtin_va_arg", RID_VA_ARG, 0 }, { "__complex", RID_COMPLEX, 0 }, { "__complex__", RID_COMPLEX, 0 }, { "__const", RID_CONST, 0 }, { "__const__", RID_CONST, 0 }, { "__extension__", RID_EXTENSION, 0 }, { "__func__", RID_C99_FUNCTION_NAME, 0 }, { "__imag", RID_IMAGPART, 0 }, { "__imag__", RID_IMAGPART, 0 }, { "__inline", RID_INLINE, 0 }, { "__inline__", RID_INLINE, 0 }, { "__label__", RID_LABEL, 0 }, { "__null", RID_NULL, 0 }, { "__real", RID_REALPART, 0 }, { "__real__", RID_REALPART, 0 }, { "__restrict", RID_RESTRICT, 0 }, { "__restrict__", RID_RESTRICT, 0 }, { "__signed", RID_SIGNED, 0 }, { "__signed__", RID_SIGNED, 0 }, { "__thread", RID_THREAD, 0 }, { "__typeof", RID_TYPEOF, 0 }, { "__typeof__", RID_TYPEOF, 0 }, { "__volatile", RID_VOLATILE, 0 }, { "__volatile__", RID_VOLATILE, 0 }, { "asm", RID_ASM, D_ASM }, { "auto", RID_AUTO, 0 }, { "bool", RID_BOOL, 0 }, { "break", RID_BREAK, 0 }, { "case", RID_CASE, 0 }, { "catch", RID_CATCH, 0 }, { "char", RID_CHAR, 0 }, { "class", RID_CLASS, 0 }, { "const", RID_CONST, 0 }, { "const_cast", RID_CONSTCAST, 0 }, { "continue", RID_CONTINUE, 0 }, { "default", RID_DEFAULT, 0 }, { "delete", RID_DELETE, 0 }, { "do", RID_DO, 0 }, { "double", RID_DOUBLE, 0 }, { "dynamic_cast", RID_DYNCAST, 0 }, { "else", RID_ELSE, 0 }, { "enum", RID_ENUM, 0 }, { "explicit", RID_EXPLICIT, 0 }, { "export", RID_EXPORT, 0 }, { "extern", RID_EXTERN, 0 }, { "false", RID_FALSE, 0 }, { "float", RID_FLOAT, 0 }, { "for", RID_FOR, 0 }, { "friend", RID_FRIEND, 0 }, { "goto", RID_GOTO, 0 }, { "if", RID_IF, 0 }, { "inline", RID_INLINE, 0 }, { "int", RID_INT, 0 }, { "long", RID_LONG, 0 }, { "mutable", RID_MUTABLE, 0 }, { "namespace", RID_NAMESPACE, 0 }, { "new", RID_NEW, 0 }, { "operator", RID_OPERATOR, 0 }, { "private", RID_PRIVATE, 0 }, { "protected", RID_PROTECTED, 0 }, { "public", RID_PUBLIC, 0 }, { "register", RID_REGISTER, 0 }, { "reinterpret_cast", RID_REINTCAST, 0 }, { "return", RID_RETURN, 0 }, { "short", RID_SHORT, 0 }, { "signed", RID_SIGNED, 0 }, { "sizeof", RID_SIZEOF, 0 }, { "static", RID_STATIC, 0 }, { "static_cast", RID_STATCAST, 0 }, { "struct", RID_STRUCT, 0 }, { "switch", RID_SWITCH, 0 }, { "template", RID_TEMPLATE, 0 }, { "this", RID_THIS, 0 }, { "throw", RID_THROW, 0 }, { "true", RID_TRUE, 0 }, { "try", RID_TRY, 0 }, { "typedef", RID_TYPEDEF, 0 }, { "typename", RID_TYPENAME, 0 }, { "typeid", RID_TYPEID, 0 }, { "typeof", RID_TYPEOF, D_ASM|D_EXT }, { "union", RID_UNION, 0 }, { "unsigned", RID_UNSIGNED, 0 }, { "using", RID_USING, 0 }, { "virtual", RID_VIRTUAL, 0 }, { "void", RID_VOID, 0 }, { "volatile", RID_VOLATILE, 0 }, { "wchar_t", RID_WCHAR, 0 }, { "while", RID_WHILE, 0 }, }; void init_reswords (void) { unsigned int i; tree id; int mask = ((flag_no_asm ? D_ASM : 0) | (flag_no_gnu_keywords ? D_EXT : 0)); ridpointers = ggc_calloc ((int) RID_MAX, sizeof (tree)); for (i = 0; i < ARRAY_SIZE (reswords); i++) { id = get_identifier (reswords[i].word); C_RID_CODE (id) = reswords[i].rid; ridpointers [(int) reswords[i].rid] = id; if (! (reswords[i].disable & mask)) C_IS_RESERVED_WORD (id) = 1; } } static void init_cp_pragma (void) { c_register_pragma (0, "vtable", handle_pragma_vtable); c_register_pragma (0, "unit", handle_pragma_unit); c_register_pragma (0, "interface", handle_pragma_interface); c_register_pragma (0, "implementation", handle_pragma_implementation); c_register_pragma ("GCC", "interface", handle_pragma_interface); c_register_pragma ("GCC", "implementation", handle_pragma_implementation); c_register_pragma ("GCC", "java_exceptions", handle_pragma_java_exceptions); } /* Initialize the C++ front end. This function is very sensitive to the exact order that things are done here. It would be nice if the initialization done by this routine were moved to its subroutines, and the ordering dependencies clarified and reduced. */ bool cxx_init (void) { static const enum tree_code stmt_codes[] = { c_common_stmt_codes, cp_stmt_codes }; INIT_STATEMENT_CODES (stmt_codes); /* We cannot just assign to input_filename because it has already been initialized and will be used later as an N_BINCL for stabs+ debugging. */ #ifdef USE_MAPPED_LOCATION push_srcloc (BUILTINS_LOCATION); #else push_srcloc ("", 0); #endif init_reswords (); init_tree (); init_cp_semantics (); init_operators (); init_method (); init_error (); current_function_decl = NULL; class_type_node = ridpointers[(int) RID_CLASS]; cxx_init_decl_processing (); /* Create the built-in __null node. It is important that this is not shared. */ null_node = make_node (INTEGER_CST); TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0); ridpointers[RID_NULL] = null_node; interface_unknown = 1; /* The fact that G++ uses COMDAT for many entities (inline functions, template instantiations, virtual tables, etc.) mean that it is fundamentally unreliable to try to make decisions about whether or not to output a particular entity until the end of the compilation. However, the inliner requires that functions be provided to the back end if they are to be inlined. Therefore, we always use unit-at-a-time mode; in that mode, we can provide entities to the back end and it will decide what to emit based on what is actually needed. */ flag_unit_at_a_time = 1; if (c_common_init () == false) { pop_srcloc(); return false; } init_cp_pragma (); init_repo (); pop_srcloc(); return true; } /* Helper function to load global variables with interface information. */ void extract_interface_info (void) { struct c_fileinfo *finfo; finfo = get_fileinfo (input_filename); interface_only = finfo->interface_only; interface_unknown = finfo->interface_unknown; } /* Return nonzero if S is not considered part of an INTERFACE/IMPLEMENTATION pair. Otherwise, return 0. */ static int interface_strcmp (const char* s) { /* Set the interface/implementation bits for this scope. */ struct impl_files *ifiles; const char *s1; for (ifiles = impl_file_chain; ifiles; ifiles = ifiles->next) { const 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 (strchr (s1, '.') || strchr (t1, '.')) continue; if (*s1 == '\0' || s1[-1] != '.' || t1[-1] != '.') continue; /* A match. */ return 0; } /* No matches. */ return 1; } /* Parse a #pragma whose sole argument is a string constant. If OPT is true, the argument is optional. */ static tree parse_strconst_pragma (const char* name, int opt) { tree result, x; enum cpp_ttype t; t = c_lex (&x); if (t == CPP_STRING) { result = x; if (c_lex (&x) != CPP_EOF) warning ("junk at end of #pragma %s", name); return result; } if (t == CPP_EOF && opt) return 0; error ("invalid #pragma %s", name); return (tree)-1; } static void handle_pragma_vtable (cpp_reader* dfile ATTRIBUTE_UNUSED ) { parse_strconst_pragma ("vtable", 0); sorry ("#pragma vtable no longer supported"); } static void handle_pragma_unit (cpp_reader* dfile ATTRIBUTE_UNUSED ) { /* Validate syntax, but don't do anything. */ parse_strconst_pragma ("unit", 0); } static void handle_pragma_interface (cpp_reader* dfile ATTRIBUTE_UNUSED ) { tree fname = parse_strconst_pragma ("interface", 1); struct c_fileinfo *finfo; const char *main_filename; if (fname == (tree)-1) return; else if (fname == 0) main_filename = lbasename (input_filename); else main_filename = TREE_STRING_POINTER (fname); finfo = get_fileinfo (input_filename); if (impl_file_chain == 0) { /* If this is zero at this point, then we are auto-implementing. */ if (main_input_filename == 0) main_input_filename = input_filename; } interface_only = interface_strcmp (main_filename); #ifdef MULTIPLE_SYMBOL_SPACES if (! interface_only) #endif interface_unknown = 0; finfo->interface_only = interface_only; finfo->interface_unknown = interface_unknown; } /* Note that we have seen a #pragma implementation for the key MAIN_FILENAME. We used to only allow this at toplevel, but that restriction was buggy in older compilers and it seems reasonable to allow it in the headers themselves, too. It only needs to precede the matching #p interface. We don't touch interface_only or interface_unknown; the user must specify a matching #p interface for this to have any effect. */ static void handle_pragma_implementation (cpp_reader* dfile ATTRIBUTE_UNUSED ) { tree fname = parse_strconst_pragma ("implementation", 1); const char *main_filename; struct impl_files *ifiles = impl_file_chain; if (fname == (tree)-1) return; if (fname == 0) { if (main_input_filename) main_filename = main_input_filename; else main_filename = input_filename; main_filename = lbasename (main_filename); } else { main_filename = TREE_STRING_POINTER (fname); if (cpp_included (parse_in, main_filename)) warning ("#pragma implementation for %s appears after file is included", main_filename); } for (; ifiles; ifiles = ifiles->next) { if (! strcmp (ifiles->filename, main_filename)) break; } if (ifiles == 0) { ifiles = xmalloc (sizeof (struct impl_files)); ifiles->filename = main_filename; ifiles->next = impl_file_chain; impl_file_chain = ifiles; } } /* Indicate that this file uses Java-personality exception handling. */ static void handle_pragma_java_exceptions (cpp_reader* dfile ATTRIBUTE_UNUSED ) { tree x; if (c_lex (&x) != CPP_EOF) warning ("junk at end of #pragma GCC java_exceptions"); choose_personality_routine (lang_java); } /* Issue an error message indicating that the lookup of NAME (an IDENTIFIER_NODE) failed. Returns the ERROR_MARK_NODE. */ tree unqualified_name_lookup_error (tree name) { if (IDENTIFIER_OPNAME_P (name)) { if (name != ansi_opname (ERROR_MARK)) error ("`%D' not defined", name); } else { error ("`%D' was not declared in this scope", name); /* Prevent repeated error messages by creating a VAR_DECL with this NAME in the innermost block scope. */ if (current_function_decl) { tree decl; decl = build_decl (VAR_DECL, name, error_mark_node); DECL_CONTEXT (decl) = current_function_decl; push_local_binding (name, decl, 0); } } return error_mark_node; } /* Like unqualified_name_lookup_error, but NAME is an unqualified-id used as a function. Returns an appropriate expression for NAME. */ tree unqualified_fn_lookup_error (tree name) { if (processing_template_decl) { /* In a template, it is invalid to write "f()" or "f(3)" if no declaration of "f" is available. Historically, G++ and most other compilers accepted that usage since they deferred all name lookup until instantiation time rather than doing unqualified name lookup at template definition time; explain to the user what is going wrong. Note that we have the exact wording of the following message in the manual (trouble.texi, node "Name lookup"), so they need to be kept in synch. */ pedwarn ("there are no arguments to `%D' that depend on a template " "parameter, so a declaration of `%D' must be available", name, name); if (!flag_permissive) { static bool hint; if (!hint) { error ("(if you use `-fpermissive', G++ will accept your code, " "but allowing the use of an undeclared name is " "deprecated)"); hint = true; } } return name; } return unqualified_name_lookup_error (name); } tree build_lang_decl (enum tree_code code, tree name, tree type) { tree t; t = build_decl (code, name, type); retrofit_lang_decl (t); /* All nesting of C++ functions is lexical; there is never a "static chain" in the sense of GNU C nested functions. */ if (code == FUNCTION_DECL) DECL_NO_STATIC_CHAIN (t) = 1; return t; } /* Add DECL_LANG_SPECIFIC info to T. Called from build_lang_decl and pushdecl (for functions generated by the backend). */ void retrofit_lang_decl (tree t) { struct lang_decl *ld; size_t size; if (CAN_HAVE_FULL_LANG_DECL_P (t)) size = sizeof (struct lang_decl); else size = sizeof (struct lang_decl_flags); ld = GGC_CNEWVAR (struct lang_decl, size); ld->decl_flags.can_be_full = CAN_HAVE_FULL_LANG_DECL_P (t) ? 1 : 0; ld->decl_flags.u1sel = TREE_CODE (t) == NAMESPACE_DECL ? 1 : 0; ld->decl_flags.u2sel = 0; if (ld->decl_flags.can_be_full) ld->u.f.u3sel = TREE_CODE (t) == FUNCTION_DECL ? 1 : 0; DECL_LANG_SPECIFIC (t) = ld; if (current_lang_name == lang_name_cplusplus || decl_linkage (t) == lk_none) SET_DECL_LANGUAGE (t, lang_cplusplus); else if (current_lang_name == lang_name_c) SET_DECL_LANGUAGE (t, lang_c); else if (current_lang_name == lang_name_java) SET_DECL_LANGUAGE (t, lang_java); else gcc_unreachable (); #ifdef GATHER_STATISTICS tree_node_counts[(int)lang_decl] += 1; tree_node_sizes[(int)lang_decl] += size; #endif } void cxx_dup_lang_specific_decl (tree node) { int size; struct lang_decl *ld; if (! DECL_LANG_SPECIFIC (node)) return; if (!CAN_HAVE_FULL_LANG_DECL_P (node)) size = sizeof (struct lang_decl_flags); else size = sizeof (struct lang_decl); ld = GGC_NEWVAR (struct lang_decl, size); memcpy (ld, DECL_LANG_SPECIFIC (node), size); DECL_LANG_SPECIFIC (node) = ld; #ifdef GATHER_STATISTICS tree_node_counts[(int)lang_decl] += 1; tree_node_sizes[(int)lang_decl] += size; #endif } /* Copy DECL, including any language-specific parts. */ tree copy_decl (tree decl) { tree copy; copy = copy_node (decl); cxx_dup_lang_specific_decl (copy); return copy; } /* Replace the shared language-specific parts of NODE with a new copy. */ static void copy_lang_type (tree node) { int size; struct lang_type *lt; if (! TYPE_LANG_SPECIFIC (node)) return; if (TYPE_LANG_SPECIFIC (node)->u.h.is_lang_type_class) size = sizeof (struct lang_type); else size = sizeof (struct lang_type_ptrmem); lt = GGC_NEWVAR (struct lang_type, size); memcpy (lt, TYPE_LANG_SPECIFIC (node), size); TYPE_LANG_SPECIFIC (node) = lt; #ifdef GATHER_STATISTICS tree_node_counts[(int)lang_type] += 1; tree_node_sizes[(int)lang_type] += size; #endif } /* Copy TYPE, including any language-specific parts. */ tree copy_type (tree type) { tree copy; copy = copy_node (type); copy_lang_type (copy); return copy; } tree cxx_make_type (enum tree_code code) { tree t = make_node (code); /* Create lang_type structure. */ if (IS_AGGR_TYPE_CODE (code) || code == BOUND_TEMPLATE_TEMPLATE_PARM) { struct lang_type *pi = GGC_CNEW (struct lang_type); TYPE_LANG_SPECIFIC (t) = pi; pi->u.c.h.is_lang_type_class = 1; #ifdef GATHER_STATISTICS tree_node_counts[(int)lang_type] += 1; tree_node_sizes[(int)lang_type] += sizeof (struct lang_type); #endif } /* Set up some flags that give proper default behavior. */ if (IS_AGGR_TYPE_CODE (code)) { SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown); CLASSTYPE_INTERFACE_ONLY (t) = interface_only; } else /* We use TYPE_ALIAS_SET for the CLASSTYPE_MARKED bits. But, TYPE_ALIAS_SET is initialized to -1 by default, so we must clear it here. */ TYPE_ALIAS_SET (t) = 0; return t; } tree make_aggr_type (enum tree_code code) { tree t = cxx_make_type (code); if (IS_AGGR_TYPE_CODE (code)) SET_IS_AGGR_TYPE (t, 1); return t; } /* Return the type-qualifier corresponding to the identifier given by RID. */ int cp_type_qual_from_rid (tree rid) { if (rid == ridpointers[(int) RID_CONST]) return TYPE_QUAL_CONST; else if (rid == ridpointers[(int) RID_VOLATILE]) return TYPE_QUAL_VOLATILE; else if (rid == ridpointers[(int) RID_RESTRICT]) return TYPE_QUAL_RESTRICT; gcc_unreachable (); return TYPE_UNQUALIFIED; }