1 /* Definitions for C parsing and type checking.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
27 #include "diagnostic.h"
29 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
30 know how big it is. This is sanity-checked in c-decl.c. */
31 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
32 (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
34 /* Language-specific declaration information. */
36 struct lang_decl GTY(())
41 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
42 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
44 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
45 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
47 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
48 nonzero if the definition of the type has already started. */
49 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
51 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
52 declarations whose type would be completed by completing that type. */
53 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
55 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
56 keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
57 and C_RID_YYCODE is the token number wanted by Yacc. */
58 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
60 struct lang_type GTY(())
62 /* In a RECORD_TYPE, a sorted array of the fields of the type. */
63 struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
64 /* In an ENUMERAL_TYPE, the min and max values. */
67 /* In a RECORD_TYPE, information specific to Objective-C, such
68 as a list of adopted protocols or a pointer to a corresponding
69 @interface. See objc/objc-act.h for details. */
73 /* Record whether a type or decl was written with nonconstant size.
74 Note that TYPE_SIZE may have simplified to a constant. */
75 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
76 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
78 /* Record whether a typedef for type `int' was actually `signed int'. */
79 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
81 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
83 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
85 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
86 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
88 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
90 #define C_DECL_DECLARED_BUILTIN(EXP) \
91 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
93 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
94 built-in prototype and does not have a non-built-in prototype. */
95 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
96 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
98 /* Record whether a decl was declared register. This is strictly a
99 front-end flag, whereas DECL_REGISTER is used for code generation;
100 they may differ for structures with volatile fields. */
101 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
103 /* Record whether a decl was used in an expression anywhere except an
104 unevaluated operand of sizeof / typeof / alignof. This is only
105 used for functions declared static but not defined, though outside
106 sizeof and typeof it is set for other function decls as well. */
107 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
109 /* Record whether a label was defined in a statement expression which
110 has finished and so can no longer be jumped to. */
111 #define C_DECL_UNJUMPABLE_STMT_EXPR(EXP) \
112 DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP))
114 /* Record whether a label was the subject of a goto from outside the
115 current level of statement expression nesting and so cannot be
116 defined right now. */
117 #define C_DECL_UNDEFINABLE_STMT_EXPR(EXP) \
118 DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP))
120 /* Record whether a label was defined in the scope of an identifier
121 with variably modified type which has finished and so can no longer
123 #define C_DECL_UNJUMPABLE_VM(EXP) \
124 DECL_LANG_FLAG_3 (LABEL_DECL_CHECK (EXP))
126 /* Record whether a label was the subject of a goto from outside the
127 current level of scopes of identifiers with variably modified type
128 and so cannot be defined right now. */
129 #define C_DECL_UNDEFINABLE_VM(EXP) \
130 DECL_LANG_FLAG_5 (LABEL_DECL_CHECK (EXP))
132 /* Record whether a variable has been declared threadprivate by
133 #pragma omp threadprivate. */
134 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
136 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
137 N.B. Could be simplified if all built-in decls had complete prototypes
138 (but this is presently difficult because some of them need FILE*). */
139 #define C_DECL_ISNT_PROTOTYPE(EXP) \
141 || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
142 && !DECL_BUILT_IN (EXP)))
144 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
145 TYPE_ARG_TYPES for functions with prototypes, but created for functions
146 without prototypes. */
147 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
149 /* For a CONSTRUCTOR, whether some initializer contains a
150 subexpression meaning it is not a constant expression. */
151 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
153 /* Record parser information about an expression that is irrelevant
154 for code generation alongside a tree representing its value. */
157 /* The value of the expression. */
159 /* Record the original unary/binary operator of an expression, which may
160 have been changed by fold, STRING_CST for unparenthesized string
161 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
162 (even if parenthesized), for subexpressions, and for non-constant
163 initializers, or ERROR_MARK for other expressions (including
164 parenthesized expressions). */
165 enum tree_code original_code;
166 /* If not NULL, the original type of an expression. This will
167 differ from the type of the value field for an enum constant.
168 The type of an enum constant is a plain integer type, but this
169 field will be the enum type. */
173 /* A kind of type specifier. Note that this information is currently
174 only used to distinguish tag definitions, tag references and typeof
176 enum c_typespec_kind {
177 /* A reserved keyword type specifier. */
179 /* A reference to a tag, previously declared, such as "struct foo".
180 This includes where the previous declaration was as a different
181 kind of tag, in which case this is only valid if shadowing that
182 tag in an inner scope. */
184 /* A reference to a tag, not previously declared in a visible
187 /* A definition of a tag such as "struct foo { int a; }". */
189 /* A typedef name. */
191 /* An ObjC-specific kind of type specifier. */
193 /* A typeof specifier. */
197 /* A type specifier: this structure is created in the parser and
198 passed to declspecs_add_type only. */
200 /* What kind of type specifier this is. */
201 enum c_typespec_kind kind;
202 /* The specifier itself. */
204 /* An expression to be evaluated before the type specifier, in the
205 case of typeof specifiers, or NULL otherwise or if no such
206 expression is required for a particular typeof specifier. In
207 particular, when typeof is applied to an expression of variably
208 modified type, that expression must be evaluated in order to
209 determine array sizes that form part of the type, but the
210 expression itself (as opposed to the array sizes) forms no part
211 of the type and so needs to be recorded separately. */
213 /* Whether the expression has operands suitable for use in constant
215 bool expr_const_operands;
218 /* A storage class specifier. */
219 enum c_storage_class {
228 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
229 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
231 enum c_typespec_keyword {
246 /* A sequence of declaration specifiers in C. */
248 /* The type specified, if a single type specifier such as a struct,
249 union or enum specifier, typedef name or typeof specifies the
250 whole type, or NULL_TREE if none or a keyword such as "void" or
251 "char" is used. Does not include qualifiers. */
253 /* Any expression to be evaluated before the type, from a typeof
256 /* The attributes from a typedef decl. */
258 /* When parsing, the attributes. Outside the parser, this will be
259 NULL; attributes (possibly from multiple lists) will be passed
262 /* Any type specifier keyword used such as "int", not reflecting
263 modifiers such as "short", or cts_none if none. */
264 enum c_typespec_keyword typespec_word;
265 /* The storage class specifier, or csc_none if none. */
266 enum c_storage_class storage_class;
267 /* Whether any expressions in typeof specifiers may appear in
268 constant expressions. */
269 BOOL_BITFIELD expr_const_operands : 1;
270 /* Whether any declaration specifiers have been seen at all. */
271 BOOL_BITFIELD declspecs_seen_p : 1;
272 /* Whether a type specifier has been seen. */
273 BOOL_BITFIELD type_seen_p : 1;
274 /* Whether something other than a storage class specifier or
275 attribute has been seen. This is used to warn for the
276 obsolescent usage of storage class specifiers other than at the
277 start of the list. (Doing this properly would require function
278 specifiers to be handled separately from storage class
280 BOOL_BITFIELD non_sc_seen_p : 1;
281 /* Whether the type is specified by a typedef or typeof name. */
282 BOOL_BITFIELD typedef_p : 1;
283 /* Whether a struct, union or enum type either had its content
284 defined by a type specifier in the list or was the first visible
285 declaration of its tag. */
286 BOOL_BITFIELD tag_defined_p : 1;
287 /* Whether the type is explicitly "signed" or specified by a typedef
288 whose type is explicitly "signed". */
289 BOOL_BITFIELD explicit_signed_p : 1;
290 /* Whether the specifiers include a deprecated typedef. */
291 BOOL_BITFIELD deprecated_p : 1;
292 /* Whether the type defaulted to "int" because there were no type
294 BOOL_BITFIELD default_int_p;
295 /* Whether "long" was specified. */
296 BOOL_BITFIELD long_p : 1;
297 /* Whether "long" was specified more than once. */
298 BOOL_BITFIELD long_long_p : 1;
299 /* Whether "short" was specified. */
300 BOOL_BITFIELD short_p : 1;
301 /* Whether "signed" was specified. */
302 BOOL_BITFIELD signed_p : 1;
303 /* Whether "unsigned" was specified. */
304 BOOL_BITFIELD unsigned_p : 1;
305 /* Whether "complex" was specified. */
306 BOOL_BITFIELD complex_p : 1;
307 /* Whether "inline" was specified. */
308 BOOL_BITFIELD inline_p : 1;
309 /* Whether "__thread" was specified. */
310 BOOL_BITFIELD thread_p : 1;
311 /* Whether "const" was specified. */
312 BOOL_BITFIELD const_p : 1;
313 /* Whether "volatile" was specified. */
314 BOOL_BITFIELD volatile_p : 1;
315 /* Whether "restrict" was specified. */
316 BOOL_BITFIELD restrict_p : 1;
317 /* Whether "_Sat" was specified. */
318 BOOL_BITFIELD saturating_p : 1;
321 /* The various kinds of declarators in C. */
322 enum c_declarator_kind {
331 /* Parenthesized declarator with nested attributes. */
335 /* Information about the parameters in a function declarator. */
337 /* A list of parameter decls. */
339 /* A list of structure, union and enum tags defined. */
341 /* A list of argument types to go in the FUNCTION_TYPE. */
343 /* A list of non-parameter decls (notably enumeration constants)
344 defined with the parameters. */
346 /* A list of VLA sizes from the parameters. In a function
347 definition, these are used to ensure that side-effects in sizes
348 of arrays converted to pointers (such as a parameter int i[n++])
349 take place; otherwise, they are ignored. */
351 /* True when these arguments had [*]. */
352 BOOL_BITFIELD had_vla_unspec : 1;
356 struct c_declarator {
357 /* The kind of declarator. */
358 enum c_declarator_kind kind;
359 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
360 struct c_declarator *declarator;
361 location_t id_loc; /* Currently only set for cdk_id. */
363 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
367 struct c_arg_info *arg_info;
370 /* The array dimension, or NULL for [] and [*]. */
372 /* The qualifiers inside []. */
374 /* The attributes (currently ignored) inside []. */
376 /* Whether [static] was used. */
377 BOOL_BITFIELD static_p : 1;
378 /* Whether [*] was used. */
379 BOOL_BITFIELD vla_unspec_p : 1;
381 /* For pointers, the qualifiers on the pointer type. */
383 /* For attributes. */
390 /* The declaration specifiers. */
391 struct c_declspecs *specs;
392 /* The declarator. */
393 struct c_declarator *declarator;
398 /* The declaration specifiers, minus any prefix attributes. */
399 struct c_declspecs *specs;
400 /* The attributes. */
402 /* The declarator. */
403 struct c_declarator *declarator;
406 /* Save and restore the variables in this file and elsewhere
407 that keep track of the progress of compilation of the current function.
408 Used for nested functions. */
410 struct language_function GTY(())
412 struct c_language_function base;
415 struct c_switch * GTY((skip)) x_switch_stack;
416 struct c_arg_info * GTY((skip)) arg_info;
419 int returns_abnormally;
420 int warn_about_return_type;
423 /* Save lists of labels used or defined in particular contexts.
424 Allocated on the parser obstack. */
428 /* The label at the head of the list. */
430 /* The rest of the list. */
431 struct c_label_list *next;
434 /* Statement expression context. */
436 struct c_label_context_se
438 /* The labels defined at this level of nesting. */
439 struct c_label_list *labels_def;
440 /* The labels used at this level of nesting. */
441 struct c_label_list *labels_used;
442 /* The next outermost context. */
443 struct c_label_context_se *next;
446 /* Context of variably modified declarations. */
448 struct c_label_context_vm
450 /* The labels defined at this level of nesting. */
451 struct c_label_list *labels_def;
452 /* The labels used at this level of nesting. */
453 struct c_label_list *labels_used;
454 /* The scope of this context. Multiple contexts may be at the same
455 numbered scope, since each variably modified declaration starts a
458 /* The next outermost context. */
459 struct c_label_context_vm *next;
462 /* Used when parsing an enum. Initialized by start_enum. */
463 struct c_enum_contents
465 /* While defining an enum type, this is 1 plus the last enumerator
467 tree enum_next_value;
469 /* Nonzero means that there was overflow computing enum_next_value. */
475 extern void c_parse_init (void);
477 /* in c-aux-info.c */
478 extern void gen_aux_info_record (tree, int, int, int);
481 extern struct obstack parser_obstack;
482 extern tree c_break_label;
483 extern tree c_cont_label;
485 extern int global_bindings_p (void);
486 extern void push_scope (void);
487 extern tree pop_scope (void);
489 extern void c_init_decl_processing (void);
490 extern void c_dup_lang_specific_decl (tree);
491 extern void c_print_identifier (FILE *, tree, int);
492 extern int quals_from_declspecs (const struct c_declspecs *);
493 extern struct c_declarator *build_array_declarator (tree, struct c_declspecs *,
495 extern tree build_enumerator (struct c_enum_contents *, tree, tree, location_t);
496 extern tree check_for_loop_decls (void);
497 extern void mark_forward_parm_decls (void);
498 extern void declare_parm_level (void);
499 extern void undeclared_variable (tree, location_t);
500 extern tree declare_label (tree);
501 extern tree define_label (location_t, tree);
502 extern void c_maybe_initialize_eh (void);
503 extern void finish_decl (tree, tree, tree, tree);
504 extern tree finish_enum (tree, tree, tree);
505 extern void finish_function (void);
506 extern tree finish_struct (tree, tree, tree);
507 extern struct c_arg_info *get_parm_info (bool);
508 extern tree grokfield (location_t, struct c_declarator *,
509 struct c_declspecs *, tree, tree *);
510 extern tree groktypename (struct c_type_name *, tree *, bool *);
511 extern tree grokparm (const struct c_parm *);
512 extern tree implicitly_declare (tree);
513 extern void keep_next_level (void);
514 extern void pending_xref_error (void);
515 extern void c_push_function_context (void);
516 extern void c_pop_function_context (void);
517 extern void push_parm_decl (const struct c_parm *);
518 extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
519 struct c_declarator *);
520 extern tree c_builtin_function (tree);
521 extern tree c_builtin_function_ext_scope (tree);
522 extern void shadow_tag (const struct c_declspecs *);
523 extern void shadow_tag_warned (const struct c_declspecs *, int);
524 extern tree start_enum (struct c_enum_contents *, tree);
525 extern int start_function (struct c_declspecs *, struct c_declarator *, tree);
526 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
528 extern tree start_struct (enum tree_code, tree);
529 extern void store_parm_decls (void);
530 extern void store_parm_decls_from (struct c_arg_info *);
531 extern tree xref_tag (enum tree_code, tree);
532 extern struct c_typespec parser_xref_tag (enum tree_code, tree);
533 extern int c_expand_decl (tree);
534 extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
535 struct c_declarator *);
536 extern struct c_declarator *build_attrs_declarator (tree,
537 struct c_declarator *);
538 extern struct c_declarator *build_function_declarator (struct c_arg_info *,
539 struct c_declarator *);
540 extern struct c_declarator *build_id_declarator (tree);
541 extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
542 struct c_declarator *);
543 extern struct c_declspecs *build_null_declspecs (void);
544 extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
545 extern struct c_declspecs *declspecs_add_type (struct c_declspecs *,
547 extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
548 extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
549 extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
551 /* in c-objc-common.c */
552 extern bool c_objc_common_init (void);
553 extern bool c_missing_noreturn_ok_p (tree);
554 extern bool c_warn_unused_global_decl (const_tree);
555 extern void c_initialize_diagnostics (diagnostic_context *);
556 extern bool c_vla_unspec_p (tree x, tree fn);
558 #define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
559 c_build_qualified_type ((TYPE), \
560 ((CONST_P) ? TYPE_QUAL_CONST : 0) | \
561 ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
564 extern bool in_late_binary_op;
565 extern int in_alignof;
566 extern int in_sizeof;
567 extern int in_typeof;
569 extern struct c_switch *c_switch_stack;
570 extern struct c_label_context_se *label_context_stack_se;
571 extern struct c_label_context_vm *label_context_stack_vm;
573 extern tree c_objc_common_truthvalue_conversion (location_t, tree);
574 extern tree require_complete_type (tree);
575 extern int same_translation_unit_p (const_tree, const_tree);
576 extern int comptypes (tree, tree);
577 extern bool c_vla_type_p (const_tree);
578 extern bool c_mark_addressable (tree);
579 extern void c_incomplete_type_error (const_tree, const_tree);
580 extern tree c_type_promotes_to (tree);
581 extern struct c_expr default_function_array_conversion (struct c_expr);
582 extern tree composite_type (tree, tree);
583 extern tree build_component_ref (tree, tree);
584 extern tree build_array_ref (tree, tree, location_t);
585 extern tree build_external_ref (tree, int, location_t, tree *);
586 extern void pop_maybe_used (bool);
587 extern struct c_expr c_expr_sizeof_expr (struct c_expr);
588 extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
589 extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr,
591 extern struct c_expr parser_build_binary_op (location_t,
592 enum tree_code, struct c_expr,
594 extern tree build_conditional_expr (tree, bool, tree, tree);
595 extern tree build_compound_expr (tree, tree);
596 extern tree c_cast_expr (struct c_type_name *, tree);
597 extern tree build_c_cast (tree, tree);
598 extern void store_init_value (tree, tree, tree);
599 extern void error_init (const char *);
600 extern void pedwarn_init (location_t, int opt, const char *);
601 extern void maybe_warn_string_init (tree, struct c_expr);
602 extern void start_init (tree, tree, int);
603 extern void finish_init (void);
604 extern void really_start_incremental_init (tree);
605 extern void push_init_level (int);
606 extern struct c_expr pop_init_level (int);
607 extern void set_init_index (tree, tree);
608 extern void set_init_label (tree);
609 extern void process_init_element (struct c_expr, bool);
610 extern tree build_compound_literal (tree, tree, bool);
611 extern tree c_start_case (tree);
612 extern void c_finish_case (tree);
613 extern tree build_asm_expr (tree, tree, tree, tree, bool);
614 extern tree build_asm_stmt (tree, tree);
615 extern int c_types_compatible_p (tree, tree);
616 extern tree c_begin_compound_stmt (bool);
617 extern tree c_end_compound_stmt (tree, bool);
618 extern void c_finish_if_stmt (location_t, tree, tree, tree, bool);
619 extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
620 extern tree c_begin_stmt_expr (void);
621 extern tree c_finish_stmt_expr (tree);
622 extern tree c_process_expr_stmt (tree);
623 extern tree c_finish_expr_stmt (tree);
624 extern tree c_finish_return (tree, tree);
625 extern tree c_finish_bc_stmt (tree *, bool);
626 extern tree c_finish_goto_label (tree);
627 extern tree c_finish_goto_ptr (tree);
628 extern void c_begin_vm_scope (unsigned int);
629 extern void c_end_vm_scope (unsigned int);
630 extern tree c_expr_to_decl (tree, bool *, bool *);
631 extern tree c_begin_omp_parallel (void);
632 extern tree c_finish_omp_parallel (tree, tree);
633 extern tree c_begin_omp_task (void);
634 extern tree c_finish_omp_task (tree, tree);
635 extern tree c_finish_omp_clauses (tree);
637 /* Set to 0 at beginning of a function definition, set to 1 if
638 a return statement that specifies a return value is seen. */
640 extern int current_function_returns_value;
642 /* Set to 0 at beginning of a function definition, set to 1 if
643 a return statement with no argument is seen. */
645 extern int current_function_returns_null;
647 /* Set to 0 at beginning of a function definition, set to 1 if
648 a call to a noreturn function is seen. */
650 extern int current_function_returns_abnormally;
652 /* Nonzero means we are reading code that came from a system header file. */
654 extern int system_header_p;
656 /* True means global_bindings_p should return false even if the scope stack
657 says we are in file scope. */
659 extern bool c_override_global_bindings_to_false;
661 /* True means we've initialized exception handling. */
662 extern bool c_eh_initialized_p;
665 extern void c_finish_incomplete_decl (tree);
666 extern void c_write_global_declarations (void);
668 /* In order for the format checking to accept the C frontend
669 diagnostic framework extensions, you must include this file before
670 toplev.h, not after. */
671 #if GCC_VERSION >= 4001
672 #define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
674 #define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
677 extern void pedwarn_c90 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
678 extern void pedwarn_c99 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
680 extern bool c_cpp_error (cpp_reader *, int, location_t, unsigned int,
681 const char *, va_list *)
682 ATTRIBUTE_GCC_CDIAG(5,0);
684 #endif /* ! GCC_C_TREE_H */