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, 2010, 2011
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/>. */
25 #include "c-family/c-common.h"
26 #include "diagnostic.h"
28 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
29 know how big it is. This is sanity-checked in c-decl.c. */
30 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
31 (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
33 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
34 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
36 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
37 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
39 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
40 nonzero if the definition of the type has already started. */
41 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
43 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
44 declarations whose type would be completed by completing that type. */
45 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
47 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
48 keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
49 and C_RID_YYCODE is the token number wanted by Yacc. */
50 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
52 /* Record whether a type or decl was written with nonconstant size.
53 Note that TYPE_SIZE may have simplified to a constant. */
54 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
55 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
57 /* Record whether a type is defined inside a struct or union type.
58 This is used for -Wc++-compat. */
59 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE)
61 /* Record whether a typedef for type `int' was actually `signed int'. */
62 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
64 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
66 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
68 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
69 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
71 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
73 #define C_DECL_DECLARED_BUILTIN(EXP) \
74 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
76 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
77 built-in prototype and does not have a non-built-in prototype. */
78 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
79 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
81 /* Record whether a decl was declared register. This is strictly a
82 front-end flag, whereas DECL_REGISTER is used for code generation;
83 they may differ for structures with volatile fields. */
84 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
86 /* Record whether a decl was used in an expression anywhere except an
87 unevaluated operand of sizeof / typeof / alignof. This is only
88 used for functions declared static but not defined, though outside
89 sizeof and typeof it is set for other function decls as well. */
90 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
92 /* Record whether a variable has been declared threadprivate by
93 #pragma omp threadprivate. */
94 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
96 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
97 N.B. Could be simplified if all built-in decls had complete prototypes
98 (but this is presently difficult because some of them need FILE*). */
99 #define C_DECL_ISNT_PROTOTYPE(EXP) \
101 || (!prototype_p (TREE_TYPE (EXP)) \
102 && !DECL_BUILT_IN (EXP)))
104 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
105 TYPE_ARG_TYPES for functions with prototypes, but created for functions
106 without prototypes. */
107 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
109 /* For a CONSTRUCTOR, whether some initializer contains a
110 subexpression meaning it is not a constant expression. */
111 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
113 /* Record parser information about an expression that is irrelevant
114 for code generation alongside a tree representing its value. */
117 /* The value of the expression. */
119 /* Record the original unary/binary operator of an expression, which may
120 have been changed by fold, STRING_CST for unparenthesized string
121 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
122 (even if parenthesized), for subexpressions, and for non-constant
123 initializers, or ERROR_MARK for other expressions (including
124 parenthesized expressions). */
125 enum tree_code original_code
;
126 /* If not NULL, the original type of an expression. This will
127 differ from the type of the value field for an enum constant.
128 The type of an enum constant is a plain integer type, but this
129 field will be the enum type. */
133 /* A kind of type specifier. Note that this information is currently
134 only used to distinguish tag definitions, tag references and typeof
136 enum c_typespec_kind
{
137 /* No typespec. This appears only in struct c_declspec. */
139 /* A reserved keyword type specifier. */
141 /* A reference to a tag, previously declared, such as "struct foo".
142 This includes where the previous declaration was as a different
143 kind of tag, in which case this is only valid if shadowing that
144 tag in an inner scope. */
146 /* A reference to a tag, not previously declared in a visible
149 /* A definition of a tag such as "struct foo { int a; }". */
151 /* A typedef name. */
153 /* An ObjC-specific kind of type specifier. */
155 /* A typeof specifier. */
159 /* A type specifier: this structure is created in the parser and
160 passed to declspecs_add_type only. */
162 /* What kind of type specifier this is. */
163 enum c_typespec_kind kind
;
164 /* Whether the expression has operands suitable for use in constant
166 bool expr_const_operands
;
167 /* The specifier itself. */
169 /* An expression to be evaluated before the type specifier, in the
170 case of typeof specifiers, or NULL otherwise or if no such
171 expression is required for a particular typeof specifier. In
172 particular, when typeof is applied to an expression of variably
173 modified type, that expression must be evaluated in order to
174 determine array sizes that form part of the type, but the
175 expression itself (as opposed to the array sizes) forms no part
176 of the type and so needs to be recorded separately. */
180 /* A storage class specifier. */
181 enum c_storage_class
{
190 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
191 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
193 enum c_typespec_keyword
{
209 /* A sequence of declaration specifiers in C. */
211 /* The type specified, if a single type specifier such as a struct,
212 union or enum specifier, typedef name or typeof specifies the
213 whole type, or NULL_TREE if none or a keyword such as "void" or
214 "char" is used. Does not include qualifiers. */
216 /* Any expression to be evaluated before the type, from a typeof
219 /* The attributes from a typedef decl. */
221 /* When parsing, the attributes. Outside the parser, this will be
222 NULL; attributes (possibly from multiple lists) will be passed
225 /* The storage class specifier, or csc_none if none. */
226 enum c_storage_class storage_class
;
227 /* Any type specifier keyword used such as "int", not reflecting
228 modifiers such as "short", or cts_none if none. */
229 ENUM_BITFIELD (c_typespec_keyword
) typespec_word
: 8;
230 /* The kind of type specifier if one has been seen, ctsk_none
232 ENUM_BITFIELD (c_typespec_kind
) typespec_kind
: 3;
233 /* Whether any expressions in typeof specifiers may appear in
234 constant expressions. */
235 BOOL_BITFIELD expr_const_operands
: 1;
236 /* Whether any declaration specifiers have been seen at all. */
237 BOOL_BITFIELD declspecs_seen_p
: 1;
238 /* Whether something other than a storage class specifier or
239 attribute has been seen. This is used to warn for the
240 obsolescent usage of storage class specifiers other than at the
241 start of the list. (Doing this properly would require function
242 specifiers to be handled separately from storage class
244 BOOL_BITFIELD non_sc_seen_p
: 1;
245 /* Whether the type is specified by a typedef or typeof name. */
246 BOOL_BITFIELD typedef_p
: 1;
247 /* Whether the type is explicitly "signed" or specified by a typedef
248 whose type is explicitly "signed". */
249 BOOL_BITFIELD explicit_signed_p
: 1;
250 /* Whether the specifiers include a deprecated typedef. */
251 BOOL_BITFIELD deprecated_p
: 1;
252 /* Whether the type defaulted to "int" because there were no type
254 BOOL_BITFIELD default_int_p
: 1;
255 /* Whether "long" was specified. */
256 BOOL_BITFIELD long_p
: 1;
257 /* Whether "long" was specified more than once. */
258 BOOL_BITFIELD long_long_p
: 1;
259 /* Whether "short" was specified. */
260 BOOL_BITFIELD short_p
: 1;
261 /* Whether "signed" was specified. */
262 BOOL_BITFIELD signed_p
: 1;
263 /* Whether "unsigned" was specified. */
264 BOOL_BITFIELD unsigned_p
: 1;
265 /* Whether "complex" was specified. */
266 BOOL_BITFIELD complex_p
: 1;
267 /* Whether "inline" was specified. */
268 BOOL_BITFIELD inline_p
: 1;
269 /* Whether "_Noreturn" was speciied. */
270 BOOL_BITFIELD noreturn_p
: 1;
271 /* Whether "__thread" was specified. */
272 BOOL_BITFIELD thread_p
: 1;
273 /* Whether "const" was specified. */
274 BOOL_BITFIELD const_p
: 1;
275 /* Whether "volatile" was specified. */
276 BOOL_BITFIELD volatile_p
: 1;
277 /* Whether "restrict" was specified. */
278 BOOL_BITFIELD restrict_p
: 1;
279 /* Whether "_Sat" was specified. */
280 BOOL_BITFIELD saturating_p
: 1;
281 /* The address space that the declaration belongs to. */
282 addr_space_t address_space
;
285 /* The various kinds of declarators in C. */
286 enum c_declarator_kind
{
295 /* Parenthesized declarator with nested attributes. */
299 typedef struct c_arg_tag_d
{
300 /* The argument name. */
302 /* The type of the argument. */
306 DEF_VEC_O(c_arg_tag
);
307 DEF_VEC_ALLOC_O(c_arg_tag
,gc
);
309 /* Information about the parameters in a function declarator. */
311 /* A list of parameter decls. */
313 /* A list of structure, union and enum tags defined. */
314 VEC(c_arg_tag
,gc
) *tags
;
315 /* A list of argument types to go in the FUNCTION_TYPE. */
317 /* A list of non-parameter decls (notably enumeration constants)
318 defined with the parameters. */
320 /* A compound expression of VLA sizes from the parameters, or NULL.
321 In a function definition, these are used to ensure that
322 side-effects in sizes of arrays converted to pointers (such as a
323 parameter int i[n++]) take place; otherwise, they are
326 /* True when these arguments had [*]. */
327 BOOL_BITFIELD had_vla_unspec
: 1;
331 struct c_declarator
{
332 /* The kind of declarator. */
333 enum c_declarator_kind kind
;
334 location_t id_loc
; /* Currently only set for cdk_id, cdk_array. */
335 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
336 struct c_declarator
*declarator
;
338 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
342 struct c_arg_info
*arg_info
;
345 /* The array dimension, or NULL for [] and [*]. */
347 /* The qualifiers inside []. */
349 /* The attributes (currently ignored) inside []. */
351 /* Whether [static] was used. */
352 BOOL_BITFIELD static_p
: 1;
353 /* Whether [*] was used. */
354 BOOL_BITFIELD vla_unspec_p
: 1;
356 /* For pointers, the qualifiers on the pointer type. */
358 /* For attributes. */
365 /* The declaration specifiers. */
366 struct c_declspecs
*specs
;
367 /* The declarator. */
368 struct c_declarator
*declarator
;
373 /* The declaration specifiers, minus any prefix attributes. */
374 struct c_declspecs
*specs
;
375 /* The attributes. */
377 /* The declarator. */
378 struct c_declarator
*declarator
;
381 /* Used when parsing an enum. Initialized by start_enum. */
382 struct c_enum_contents
384 /* While defining an enum type, this is 1 plus the last enumerator
386 tree enum_next_value
;
388 /* Nonzero means that there was overflow computing enum_next_value. */
392 /* A type of reference to a static identifier in an inline
394 enum c_inline_static_type
{
395 /* Identifier with internal linkage used in function that may be an
396 inline definition (i.e., file-scope static). */
398 /* Modifiable object with static storage duration defined in
399 function that may be an inline definition (i.e., local
406 extern void c_parse_init (void);
408 /* in c-aux-info.c */
409 extern void gen_aux_info_record (tree
, int, int, int);
412 struct c_spot_bindings
;
413 struct c_struct_parse_info
;
414 extern struct obstack parser_obstack
;
415 extern tree c_break_label
;
416 extern tree c_cont_label
;
418 extern bool global_bindings_p (void);
419 extern void push_scope (void);
420 extern tree
pop_scope (void);
421 extern void c_bindings_start_stmt_expr (struct c_spot_bindings
*);
422 extern void c_bindings_end_stmt_expr (struct c_spot_bindings
*);
424 extern void record_inline_static (location_t
, tree
, tree
,
425 enum c_inline_static_type
);
426 extern void c_init_decl_processing (void);
427 extern void c_print_identifier (FILE *, tree
, int);
428 extern int quals_from_declspecs (const struct c_declspecs
*);
429 extern struct c_declarator
*build_array_declarator (location_t
, tree
,
430 struct c_declspecs
*,
432 extern tree
build_enumerator (location_t
, location_t
, struct c_enum_contents
*,
434 extern tree
check_for_loop_decls (location_t
, bool);
435 extern void mark_forward_parm_decls (void);
436 extern void declare_parm_level (void);
437 extern void undeclared_variable (location_t
, tree
);
438 extern tree
lookup_label_for_goto (location_t
, tree
);
439 extern tree
declare_label (tree
);
440 extern tree
define_label (location_t
, tree
);
441 extern struct c_spot_bindings
*c_get_switch_bindings (void);
442 extern void c_release_switch_bindings (struct c_spot_bindings
*);
443 extern bool c_check_switch_jump_warnings (struct c_spot_bindings
*,
444 location_t
, location_t
);
445 extern void finish_decl (tree
, location_t
, tree
, tree
, tree
);
446 extern tree
finish_enum (tree
, tree
, tree
);
447 extern void finish_function (void);
448 extern tree
finish_struct (location_t
, tree
, tree
, tree
,
449 struct c_struct_parse_info
*);
450 extern struct c_arg_info
*build_arg_info (void);
451 extern struct c_arg_info
*get_parm_info (bool, tree
);
452 extern tree
grokfield (location_t
, struct c_declarator
*,
453 struct c_declspecs
*, tree
, tree
*);
454 extern tree
groktypename (struct c_type_name
*, tree
*, bool *);
455 extern tree
grokparm (const struct c_parm
*, tree
*);
456 extern tree
implicitly_declare (location_t
, tree
);
457 extern void keep_next_level (void);
458 extern void pending_xref_error (void);
459 extern void c_push_function_context (void);
460 extern void c_pop_function_context (void);
461 extern void push_parm_decl (const struct c_parm
*, tree
*);
462 extern struct c_declarator
*set_array_declarator_inner (struct c_declarator
*,
463 struct c_declarator
*);
464 extern tree
c_builtin_function (tree
);
465 extern tree
c_builtin_function_ext_scope (tree
);
466 extern void shadow_tag (const struct c_declspecs
*);
467 extern void shadow_tag_warned (const struct c_declspecs
*, int);
468 extern tree
start_enum (location_t
, struct c_enum_contents
*, tree
);
469 extern int start_function (struct c_declspecs
*, struct c_declarator
*, tree
);
470 extern tree
start_decl (struct c_declarator
*, struct c_declspecs
*, bool,
472 extern tree
start_struct (location_t
, enum tree_code
, tree
,
473 struct c_struct_parse_info
**);
474 extern void store_parm_decls (void);
475 extern void store_parm_decls_from (struct c_arg_info
*);
476 extern tree
xref_tag (enum tree_code
, tree
);
477 extern struct c_typespec
parser_xref_tag (location_t
, enum tree_code
, tree
);
478 extern int c_expand_decl (tree
);
479 extern struct c_parm
*build_c_parm (struct c_declspecs
*, tree
,
480 struct c_declarator
*);
481 extern struct c_declarator
*build_attrs_declarator (tree
,
482 struct c_declarator
*);
483 extern struct c_declarator
*build_function_declarator (struct c_arg_info
*,
484 struct c_declarator
*);
485 extern struct c_declarator
*build_id_declarator (tree
);
486 extern struct c_declarator
*make_pointer_declarator (struct c_declspecs
*,
487 struct c_declarator
*);
488 extern struct c_declspecs
*build_null_declspecs (void);
489 extern struct c_declspecs
*declspecs_add_qual (struct c_declspecs
*, tree
);
490 extern struct c_declspecs
*declspecs_add_type (location_t
,
491 struct c_declspecs
*,
493 extern struct c_declspecs
*declspecs_add_scspec (struct c_declspecs
*, tree
);
494 extern struct c_declspecs
*declspecs_add_attrs (struct c_declspecs
*, tree
);
495 extern struct c_declspecs
*declspecs_add_addrspace (struct c_declspecs
*,
497 extern struct c_declspecs
*finish_declspecs (struct c_declspecs
*);
499 /* in c-objc-common.c */
500 extern bool c_objc_common_init (void);
501 extern bool c_missing_noreturn_ok_p (tree
);
502 extern bool c_warn_unused_global_decl (const_tree
);
503 extern void c_initialize_diagnostics (diagnostic_context
*);
504 extern bool c_vla_unspec_p (tree x
, tree fn
);
507 extern int in_alignof
;
508 extern int in_sizeof
;
509 extern int in_typeof
;
511 extern struct c_switch
*c_switch_stack
;
513 extern tree
c_objc_common_truthvalue_conversion (location_t
, tree
);
514 extern tree
require_complete_type (tree
);
515 extern int same_translation_unit_p (const_tree
, const_tree
);
516 extern int comptypes (tree
, tree
);
517 extern int comptypes_check_different_types (tree
, tree
, bool *);
518 extern bool c_vla_type_p (const_tree
);
519 extern bool c_mark_addressable (tree
);
520 extern void c_incomplete_type_error (const_tree
, const_tree
);
521 extern tree
c_type_promotes_to (tree
);
522 extern struct c_expr
default_function_array_conversion (location_t
,
524 extern struct c_expr
default_function_array_read_conversion (location_t
,
526 extern void mark_exp_read (tree
);
527 extern tree
composite_type (tree
, tree
);
528 extern tree
build_component_ref (location_t
, tree
, tree
);
529 extern tree
build_array_ref (location_t
, tree
, tree
);
530 extern tree
build_external_ref (location_t
, tree
, int, tree
*);
531 extern void pop_maybe_used (bool);
532 extern struct c_expr
c_expr_sizeof_expr (location_t
, struct c_expr
);
533 extern struct c_expr
c_expr_sizeof_type (location_t
, struct c_type_name
*);
534 extern struct c_expr
parser_build_unary_op (location_t
, enum tree_code
,
536 extern struct c_expr
parser_build_binary_op (location_t
,
537 enum tree_code
, struct c_expr
,
539 extern tree
build_conditional_expr (location_t
, tree
, bool, tree
, tree
,
541 extern tree
build_compound_expr (location_t
, tree
, tree
);
542 extern tree
c_cast_expr (location_t
, struct c_type_name
*, tree
);
543 extern tree
build_c_cast (location_t
, tree
, tree
);
544 extern void store_init_value (location_t
, tree
, tree
, tree
);
545 extern void error_init (const char *);
546 extern void pedwarn_init (location_t
, int opt
, const char *);
547 extern void maybe_warn_string_init (tree
, struct c_expr
);
548 extern void start_init (tree
, tree
, int);
549 extern void finish_init (void);
550 extern void really_start_incremental_init (tree
);
551 extern void push_init_level (int, struct obstack
*);
552 extern struct c_expr
pop_init_level (int, struct obstack
*);
553 extern void set_init_index (tree
, tree
, struct obstack
*);
554 extern void set_init_label (tree
, struct obstack
*);
555 extern void process_init_element (struct c_expr
, bool, struct obstack
*);
556 extern tree
build_compound_literal (location_t
, tree
, tree
, bool);
557 extern void check_compound_literal_type (location_t
, struct c_type_name
*);
558 extern tree
c_start_case (location_t
, location_t
, tree
);
559 extern void c_finish_case (tree
);
560 extern tree
build_asm_expr (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
561 extern tree
build_asm_stmt (tree
, tree
);
562 extern int c_types_compatible_p (tree
, tree
);
563 extern tree
c_begin_compound_stmt (bool);
564 extern tree
c_end_compound_stmt (location_t
, tree
, bool);
565 extern void c_finish_if_stmt (location_t
, tree
, tree
, tree
, bool);
566 extern void c_finish_loop (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
567 extern tree
c_begin_stmt_expr (void);
568 extern tree
c_finish_stmt_expr (location_t
, tree
);
569 extern tree
c_process_expr_stmt (location_t
, tree
);
570 extern tree
c_finish_expr_stmt (location_t
, tree
);
571 extern tree
c_finish_return (location_t
, tree
, tree
);
572 extern tree
c_finish_bc_stmt (location_t
, tree
*, bool);
573 extern tree
c_finish_goto_label (location_t
, tree
);
574 extern tree
c_finish_goto_ptr (location_t
, tree
);
575 extern tree
c_expr_to_decl (tree
, bool *, bool *);
576 extern tree
c_begin_omp_parallel (void);
577 extern tree
c_finish_omp_parallel (location_t
, tree
, tree
);
578 extern tree
c_begin_omp_task (void);
579 extern tree
c_finish_omp_task (location_t
, tree
, tree
);
580 extern tree
c_finish_omp_clauses (tree
);
581 extern tree
c_build_va_arg (location_t
, tree
, tree
);
583 /* Set to 0 at beginning of a function definition, set to 1 if
584 a return statement that specifies a return value is seen. */
586 extern int current_function_returns_value
;
588 /* Set to 0 at beginning of a function definition, set to 1 if
589 a return statement with no argument is seen. */
591 extern int current_function_returns_null
;
593 /* Set to 0 at beginning of a function definition, set to 1 if
594 a call to a noreturn function is seen. */
596 extern int current_function_returns_abnormally
;
598 /* Nonzero means we are reading code that came from a system header file. */
600 extern int system_header_p
;
603 extern void c_finish_incomplete_decl (tree
);
604 extern void c_write_global_declarations (void);
607 extern void pedwarn_c90 (location_t
, int opt
, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
608 extern void pedwarn_c99 (location_t
, int opt
, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
610 #endif /* ! GCC_C_TREE_H */