2007-01-03 Paul Brook <paul@codesourcery.com>
[official-gcc.git] / gcc / c-tree.h
blob87af5cbae9ddc1530851da8c9d48de78de0cc7f1
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 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301, USA. */
22 #ifndef GCC_C_TREE_H
23 #define GCC_C_TREE_H
25 #include "c-common.h"
26 #include "toplev.h"
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(())
38 char dummy;
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. */
65 tree enum_min;
66 tree enum_max;
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. */
70 tree objc_info;
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
82 return type. */
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
89 been declared. */
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
122 be jumped to. */
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) \
140 (EXP == 0 \
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 /* Record parser information about an expression that is irrelevant
150 for code generation alongside a tree representing its value. */
151 struct c_expr
153 /* The value of the expression. */
154 tree value;
155 /* Record the original binary operator of an expression, which may
156 have been changed by fold, STRING_CST for unparenthesized string
157 constants, or ERROR_MARK for other expressions (including
158 parenthesized expressions). */
159 enum tree_code original_code;
162 /* A kind of type specifier. Note that this information is currently
163 only used to distinguish tag definitions, tag references and typeof
164 uses. */
165 enum c_typespec_kind {
166 /* A reserved keyword type specifier. */
167 ctsk_resword,
168 /* A reference to a tag, previously declared, such as "struct foo".
169 This includes where the previous declaration was as a different
170 kind of tag, in which case this is only valid if shadowing that
171 tag in an inner scope. */
172 ctsk_tagref,
173 /* A reference to a tag, not previously declared in a visible
174 scope. */
175 ctsk_tagfirstref,
176 /* A definition of a tag such as "struct foo { int a; }". */
177 ctsk_tagdef,
178 /* A typedef name. */
179 ctsk_typedef,
180 /* An ObjC-specific kind of type specifier. */
181 ctsk_objc,
182 /* A typeof specifier. */
183 ctsk_typeof
186 /* A type specifier: this structure is created in the parser and
187 passed to declspecs_add_type only. */
188 struct c_typespec {
189 /* What kind of type specifier this is. */
190 enum c_typespec_kind kind;
191 /* The specifier itself. */
192 tree spec;
195 /* A storage class specifier. */
196 enum c_storage_class {
197 csc_none,
198 csc_auto,
199 csc_extern,
200 csc_register,
201 csc_static,
202 csc_typedef
205 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
206 "double", or none of these. */
207 enum c_typespec_keyword {
208 cts_none,
209 cts_void,
210 cts_bool,
211 cts_char,
212 cts_int,
213 cts_float,
214 cts_double,
215 cts_dfloat32,
216 cts_dfloat64,
217 cts_dfloat128
220 /* A sequence of declaration specifiers in C. */
221 struct c_declspecs {
222 /* The type specified, if a single type specifier such as a struct,
223 union or enum specifier, typedef name or typeof specifies the
224 whole type, or NULL_TREE if none or a keyword such as "void" or
225 "char" is used. Does not include qualifiers. */
226 tree type;
227 /* The attributes from a typedef decl. */
228 tree decl_attr;
229 /* When parsing, the attributes. Outside the parser, this will be
230 NULL; attributes (possibly from multiple lists) will be passed
231 separately. */
232 tree attrs;
233 /* Any type specifier keyword used such as "int", not reflecting
234 modifiers such as "short", or cts_none if none. */
235 enum c_typespec_keyword typespec_word;
236 /* The storage class specifier, or csc_none if none. */
237 enum c_storage_class storage_class;
238 /* Whether any declaration specifiers have been seen at all. */
239 BOOL_BITFIELD declspecs_seen_p : 1;
240 /* Whether a type specifier has been seen. */
241 BOOL_BITFIELD type_seen_p : 1;
242 /* Whether something other than a storage class specifier or
243 attribute has been seen. This is used to warn for the
244 obsolescent usage of storage class specifiers other than at the
245 start of the list. (Doing this properly would require function
246 specifiers to be handled separately from storage class
247 specifiers.) */
248 BOOL_BITFIELD non_sc_seen_p : 1;
249 /* Whether the type is specified by a typedef or typeof name. */
250 BOOL_BITFIELD typedef_p : 1;
251 /* Whether a struct, union or enum type either had its content
252 defined by a type specifier in the list or was the first visible
253 declaration of its tag. */
254 BOOL_BITFIELD tag_defined_p : 1;
255 /* Whether the type is explicitly "signed" or specified by a typedef
256 whose type is explicitly "signed". */
257 BOOL_BITFIELD explicit_signed_p : 1;
258 /* Whether the specifiers include a deprecated typedef. */
259 BOOL_BITFIELD deprecated_p : 1;
260 /* Whether the type defaulted to "int" because there were no type
261 specifiers. */
262 BOOL_BITFIELD default_int_p;
263 /* Whether "long" was specified. */
264 BOOL_BITFIELD long_p : 1;
265 /* Whether "long" was specified more than once. */
266 BOOL_BITFIELD long_long_p : 1;
267 /* Whether "short" was specified. */
268 BOOL_BITFIELD short_p : 1;
269 /* Whether "signed" was specified. */
270 BOOL_BITFIELD signed_p : 1;
271 /* Whether "unsigned" was specified. */
272 BOOL_BITFIELD unsigned_p : 1;
273 /* Whether "complex" was specified. */
274 BOOL_BITFIELD complex_p : 1;
275 /* Whether "inline" was specified. */
276 BOOL_BITFIELD inline_p : 1;
277 /* Whether "__thread" was specified. */
278 BOOL_BITFIELD thread_p : 1;
279 /* Whether "const" was specified. */
280 BOOL_BITFIELD const_p : 1;
281 /* Whether "volatile" was specified. */
282 BOOL_BITFIELD volatile_p : 1;
283 /* Whether "restrict" was specified. */
284 BOOL_BITFIELD restrict_p : 1;
287 /* The various kinds of declarators in C. */
288 enum c_declarator_kind {
289 /* An identifier. */
290 cdk_id,
291 /* A function. */
292 cdk_function,
293 /* An array. */
294 cdk_array,
295 /* A pointer. */
296 cdk_pointer,
297 /* Parenthesized declarator with nested attributes. */
298 cdk_attrs
301 /* Information about the parameters in a function declarator. */
302 struct c_arg_info {
303 /* A list of parameter decls. */
304 tree parms;
305 /* A list of structure, union and enum tags defined. */
306 tree tags;
307 /* A list of argument types to go in the FUNCTION_TYPE. */
308 tree types;
309 /* A list of non-parameter decls (notably enumeration constants)
310 defined with the parameters. */
311 tree others;
312 /* A list of VLA sizes from the parameters. In a function
313 definition, these are used to ensure that side-effects in sizes
314 of arrays converted to pointers (such as a parameter int i[n++])
315 take place; otherwise, they are ignored. */
316 tree pending_sizes;
317 /* True when these arguments had [*]. */
318 BOOL_BITFIELD had_vla_unspec : 1;
321 /* A declarator. */
322 struct c_declarator {
323 /* The kind of declarator. */
324 enum c_declarator_kind kind;
325 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
326 struct c_declarator *declarator;
327 location_t id_loc; /* Currently only set for cdk_id. */
328 union {
329 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
330 declarator. */
331 tree id;
332 /* For functions. */
333 struct c_arg_info *arg_info;
334 /* For arrays. */
335 struct {
336 /* The array dimension, or NULL for [] and [*]. */
337 tree dimen;
338 /* The qualifiers inside []. */
339 int quals;
340 /* The attributes (currently ignored) inside []. */
341 tree attrs;
342 /* Whether [static] was used. */
343 BOOL_BITFIELD static_p : 1;
344 /* Whether [*] was used. */
345 BOOL_BITFIELD vla_unspec_p : 1;
346 } array;
347 /* For pointers, the qualifiers on the pointer type. */
348 int pointer_quals;
349 /* For attributes. */
350 tree attrs;
351 } u;
354 /* A type name. */
355 struct c_type_name {
356 /* The declaration specifiers. */
357 struct c_declspecs *specs;
358 /* The declarator. */
359 struct c_declarator *declarator;
362 /* A parameter. */
363 struct c_parm {
364 /* The declaration specifiers, minus any prefix attributes. */
365 struct c_declspecs *specs;
366 /* The attributes. */
367 tree attrs;
368 /* The declarator. */
369 struct c_declarator *declarator;
372 /* Save and restore the variables in this file and elsewhere
373 that keep track of the progress of compilation of the current function.
374 Used for nested functions. */
376 struct language_function GTY(())
378 struct c_language_function base;
379 tree x_break_label;
380 tree x_cont_label;
381 struct c_switch * GTY((skip)) x_switch_stack;
382 struct c_arg_info * GTY((skip)) arg_info;
383 int returns_value;
384 int returns_null;
385 int returns_abnormally;
386 int warn_about_return_type;
389 /* Save lists of labels used or defined in particular contexts.
390 Allocated on the parser obstack. */
392 struct c_label_list
394 /* The label at the head of the list. */
395 tree label;
396 /* The rest of the list. */
397 struct c_label_list *next;
400 /* Statement expression context. */
402 struct c_label_context_se
404 /* The labels defined at this level of nesting. */
405 struct c_label_list *labels_def;
406 /* The labels used at this level of nesting. */
407 struct c_label_list *labels_used;
408 /* The next outermost context. */
409 struct c_label_context_se *next;
412 /* Context of variably modified declarations. */
414 struct c_label_context_vm
416 /* The labels defined at this level of nesting. */
417 struct c_label_list *labels_def;
418 /* The labels used at this level of nesting. */
419 struct c_label_list *labels_used;
420 /* The scope of this context. Multiple contexts may be at the same
421 numbered scope, since each variably modified declaration starts a
422 new context. */
423 unsigned scope;
424 /* The next outermost context. */
425 struct c_label_context_vm *next;
429 /* in c-parser.c */
430 extern void c_parse_init (void);
432 /* in c-aux-info.c */
433 extern void gen_aux_info_record (tree, int, int, int);
435 /* in c-decl.c */
436 extern struct obstack parser_obstack;
437 extern tree c_break_label;
438 extern tree c_cont_label;
440 extern int global_bindings_p (void);
441 extern void push_scope (void);
442 extern tree pop_scope (void);
443 extern void insert_block (tree);
444 extern void c_expand_body (tree);
446 extern void c_init_decl_processing (void);
447 extern void c_dup_lang_specific_decl (tree);
448 extern void c_print_identifier (FILE *, tree, int);
449 extern int quals_from_declspecs (const struct c_declspecs *);
450 extern struct c_declarator *build_array_declarator (tree, struct c_declspecs *,
451 bool, bool);
452 extern tree build_enumerator (tree, tree);
453 extern tree check_for_loop_decls (void);
454 extern void mark_forward_parm_decls (void);
455 extern void declare_parm_level (void);
456 extern void undeclared_variable (tree, location_t);
457 extern tree declare_label (tree);
458 extern tree define_label (location_t, tree);
459 extern void c_maybe_initialize_eh (void);
460 extern void finish_decl (tree, tree, tree);
461 extern tree finish_enum (tree, tree, tree);
462 extern void finish_function (void);
463 extern tree finish_struct (tree, tree, tree);
464 extern struct c_arg_info *get_parm_info (bool);
465 extern tree grokfield (struct c_declarator *, struct c_declspecs *, tree);
466 extern tree groktypename (struct c_type_name *);
467 extern tree grokparm (const struct c_parm *);
468 extern tree implicitly_declare (tree);
469 extern void keep_next_level (void);
470 extern void pending_xref_error (void);
471 extern void c_push_function_context (struct function *);
472 extern void c_pop_function_context (struct function *);
473 extern void push_parm_decl (const struct c_parm *);
474 extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
475 struct c_declarator *,
476 bool);
477 extern tree c_builtin_function (tree);
478 extern void shadow_tag (const struct c_declspecs *);
479 extern void shadow_tag_warned (const struct c_declspecs *, int);
480 extern tree start_enum (tree);
481 extern int start_function (struct c_declspecs *, struct c_declarator *, tree);
482 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
483 tree);
484 extern tree start_struct (enum tree_code, tree);
485 extern void store_parm_decls (void);
486 extern void store_parm_decls_from (struct c_arg_info *);
487 extern tree xref_tag (enum tree_code, tree);
488 extern struct c_typespec parser_xref_tag (enum tree_code, tree);
489 extern int c_expand_decl (tree);
490 extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
491 struct c_declarator *);
492 extern struct c_declarator *build_attrs_declarator (tree,
493 struct c_declarator *);
494 extern struct c_declarator *build_function_declarator (struct c_arg_info *,
495 struct c_declarator *);
496 extern struct c_declarator *build_id_declarator (tree);
497 extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
498 struct c_declarator *);
499 extern struct c_declspecs *build_null_declspecs (void);
500 extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
501 extern struct c_declspecs *declspecs_add_type (struct c_declspecs *,
502 struct c_typespec);
503 extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
504 extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
505 extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
507 /* in c-objc-common.c */
508 extern int c_disregard_inline_limits (tree);
509 extern int c_cannot_inline_tree_fn (tree *);
510 extern bool c_objc_common_init (void);
511 extern bool c_missing_noreturn_ok_p (tree);
512 extern tree c_objc_common_truthvalue_conversion (tree expr);
513 extern bool c_warn_unused_global_decl (tree);
514 extern void c_initialize_diagnostics (diagnostic_context *);
515 extern bool c_vla_unspec_p (tree x, tree fn);
517 #define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
518 c_build_qualified_type ((TYPE), \
519 ((CONST_P) ? TYPE_QUAL_CONST : 0) | \
520 ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
522 /* in c-typeck.c */
523 extern int in_alignof;
524 extern int in_sizeof;
525 extern int in_typeof;
527 extern struct c_switch *c_switch_stack;
528 extern struct c_label_context_se *label_context_stack_se;
529 extern struct c_label_context_vm *label_context_stack_vm;
531 extern tree require_complete_type (tree);
532 extern int same_translation_unit_p (tree, tree);
533 extern int comptypes (tree, tree);
534 extern bool c_vla_type_p (tree);
535 extern bool c_mark_addressable (tree);
536 extern void c_incomplete_type_error (tree, tree);
537 extern tree c_type_promotes_to (tree);
538 extern struct c_expr default_function_array_conversion (struct c_expr);
539 extern tree composite_type (tree, tree);
540 extern tree build_component_ref (tree, tree);
541 extern tree build_array_ref (tree, tree);
542 extern tree build_external_ref (tree, int, location_t);
543 extern void pop_maybe_used (bool);
544 extern struct c_expr c_expr_sizeof_expr (struct c_expr);
545 extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
546 extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr);
547 extern struct c_expr parser_build_binary_op (enum tree_code, struct c_expr,
548 struct c_expr);
549 extern tree build_conditional_expr (tree, tree, tree);
550 extern tree build_compound_expr (tree, tree);
551 extern tree c_cast_expr (struct c_type_name *, tree);
552 extern tree build_c_cast (tree, tree);
553 extern void store_init_value (tree, tree);
554 extern void error_init (const char *);
555 extern void pedwarn_init (const char *);
556 extern void maybe_warn_string_init (tree, struct c_expr);
557 extern void start_init (tree, tree, int);
558 extern void finish_init (void);
559 extern void really_start_incremental_init (tree);
560 extern void push_init_level (int);
561 extern struct c_expr pop_init_level (int);
562 extern void set_init_index (tree, tree);
563 extern void set_init_label (tree);
564 extern void process_init_element (struct c_expr);
565 extern tree build_compound_literal (tree, tree);
566 extern tree c_start_case (tree);
567 extern void c_finish_case (tree);
568 extern tree build_asm_expr (tree, tree, tree, tree, bool);
569 extern tree build_asm_stmt (tree, tree);
570 extern tree c_convert_parm_for_inlining (tree, tree, tree, int);
571 extern int c_types_compatible_p (tree, tree);
572 extern tree c_begin_compound_stmt (bool);
573 extern tree c_end_compound_stmt (tree, bool);
574 extern void c_finish_if_stmt (location_t, tree, tree, tree, bool);
575 extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
576 extern tree c_begin_stmt_expr (void);
577 extern tree c_finish_stmt_expr (tree);
578 extern tree c_process_expr_stmt (tree);
579 extern tree c_finish_expr_stmt (tree);
580 extern tree c_finish_return (tree);
581 extern tree c_finish_bc_stmt (tree *, bool);
582 extern tree c_finish_goto_label (tree);
583 extern tree c_finish_goto_ptr (tree);
584 extern void c_begin_vm_scope (unsigned int);
585 extern void c_end_vm_scope (unsigned int);
586 extern tree c_expr_to_decl (tree, bool *, bool *, bool *);
587 extern tree c_begin_omp_parallel (void);
588 extern tree c_finish_omp_parallel (tree, tree);
589 extern tree c_finish_omp_clauses (tree);
591 /* Set to 0 at beginning of a function definition, set to 1 if
592 a return statement that specifies a return value is seen. */
594 extern int current_function_returns_value;
596 /* Set to 0 at beginning of a function definition, set to 1 if
597 a return statement with no argument is seen. */
599 extern int current_function_returns_null;
601 /* Set to 0 at beginning of a function definition, set to 1 if
602 a call to a noreturn function is seen. */
604 extern int current_function_returns_abnormally;
606 /* Nonzero means we are reading code that came from a system header file. */
608 extern int system_header_p;
610 /* True means global_bindings_p should return false even if the scope stack
611 says we are in file scope. */
613 extern bool c_override_global_bindings_to_false;
615 /* True means we've initialized exception handling. */
616 extern bool c_eh_initialized_p;
618 /* In c-decl.c */
619 extern void c_finish_incomplete_decl (tree);
620 extern void c_write_global_declarations (void);
622 /* In order for the format checking to accept the C frontend
623 diagnostic framework extensions, you must include this file before
624 toplev.h, not after. */
625 #if GCC_VERSION >= 4001
626 #define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
627 #else
628 #define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
629 #endif
631 extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
632 extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
634 #endif /* ! GCC_C_TREE_H */