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
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"
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 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
35 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
37 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
38 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
40 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
41 nonzero if the definition of the type has already started. */
42 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
44 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
45 declarations whose type would be completed by completing that type. */
46 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
48 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
49 keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
50 and C_RID_YYCODE is the token number wanted by Yacc. */
51 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
53 /* Record whether a type or decl was written with nonconstant size.
54 Note that TYPE_SIZE may have simplified to a constant. */
55 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
56 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
58 /* Record whether a type is defined inside a struct or union type.
59 This is used for -Wc++-compat. */
60 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE)
62 /* Record whether a typedef for type `int' was actually `signed int'. */
63 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
65 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
67 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
69 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
70 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
72 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
74 #define C_DECL_DECLARED_BUILTIN(EXP) \
75 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
77 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
78 built-in prototype and does not have a non-built-in prototype. */
79 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
80 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
82 /* Record whether a decl was declared register. This is strictly a
83 front-end flag, whereas DECL_REGISTER is used for code generation;
84 they may differ for structures with volatile fields. */
85 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
87 /* Record whether a decl was used in an expression anywhere except an
88 unevaluated operand of sizeof / typeof / alignof. This is only
89 used for functions declared static but not defined, though outside
90 sizeof and typeof it is set for other function decls as well. */
91 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
93 /* Record whether a variable has been declared threadprivate by
94 #pragma omp threadprivate. */
95 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
97 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
98 N.B. Could be simplified if all built-in decls had complete prototypes
99 (but this is presently difficult because some of them need FILE*). */
100 #define C_DECL_ISNT_PROTOTYPE(EXP) \
102 || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0 \
103 && !DECL_BUILT_IN (EXP)))
105 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
106 TYPE_ARG_TYPES for functions with prototypes, but created for functions
107 without prototypes. */
108 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
110 /* For a CONSTRUCTOR, whether some initializer contains a
111 subexpression meaning it is not a constant expression. */
112 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
114 /* Record parser information about an expression that is irrelevant
115 for code generation alongside a tree representing its value. */
118 /* The value of the expression. */
120 /* Record the original unary/binary operator of an expression, which may
121 have been changed by fold, STRING_CST for unparenthesized string
122 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
123 (even if parenthesized), for subexpressions, and for non-constant
124 initializers, or ERROR_MARK for other expressions (including
125 parenthesized expressions). */
126 enum tree_code original_code
;
127 /* If not NULL, the original type of an expression. This will
128 differ from the type of the value field for an enum constant.
129 The type of an enum constant is a plain integer type, but this
130 field will be the enum type. */
134 /* A kind of type specifier. Note that this information is currently
135 only used to distinguish tag definitions, tag references and typeof
137 enum c_typespec_kind
{
138 /* A reserved keyword type specifier. */
140 /* A reference to a tag, previously declared, such as "struct foo".
141 This includes where the previous declaration was as a different
142 kind of tag, in which case this is only valid if shadowing that
143 tag in an inner scope. */
145 /* A reference to a tag, not previously declared in a visible
148 /* A definition of a tag such as "struct foo { int a; }". */
150 /* A typedef name. */
152 /* An ObjC-specific kind of type specifier. */
154 /* A typeof specifier. */
158 /* A type specifier: this structure is created in the parser and
159 passed to declspecs_add_type only. */
161 /* What kind of type specifier this is. */
162 enum c_typespec_kind kind
;
163 /* Whether the expression has operands suitable for use in constant
165 bool expr_const_operands
;
166 /* The specifier itself. */
168 /* An expression to be evaluated before the type specifier, in the
169 case of typeof specifiers, or NULL otherwise or if no such
170 expression is required for a particular typeof specifier. In
171 particular, when typeof is applied to an expression of variably
172 modified type, that expression must be evaluated in order to
173 determine array sizes that form part of the type, but the
174 expression itself (as opposed to the array sizes) forms no part
175 of the type and so needs to be recorded separately. */
179 /* A storage class specifier. */
180 enum c_storage_class
{
189 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
190 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
192 enum c_typespec_keyword
{
208 /* A sequence of declaration specifiers in C. */
210 /* The type specified, if a single type specifier such as a struct,
211 union or enum specifier, typedef name or typeof specifies the
212 whole type, or NULL_TREE if none or a keyword such as "void" or
213 "char" is used. Does not include qualifiers. */
215 /* Any expression to be evaluated before the type, from a typeof
218 /* The attributes from a typedef decl. */
220 /* When parsing, the attributes. Outside the parser, this will be
221 NULL; attributes (possibly from multiple lists) will be passed
224 /* The storage class specifier, or csc_none if none. */
225 enum c_storage_class storage_class
;
226 /* Any type specifier keyword used such as "int", not reflecting
227 modifiers such as "short", or cts_none if none. */
228 ENUM_BITFIELD (c_typespec_keyword
) typespec_word
: 8;
229 /* Whether any expressions in typeof specifiers may appear in
230 constant expressions. */
231 BOOL_BITFIELD expr_const_operands
: 1;
232 /* Whether any declaration specifiers have been seen at all. */
233 BOOL_BITFIELD declspecs_seen_p
: 1;
234 /* Whether a type specifier has been seen. */
235 BOOL_BITFIELD type_seen_p
: 1;
236 /* Whether something other than a storage class specifier or
237 attribute has been seen. This is used to warn for the
238 obsolescent usage of storage class specifiers other than at the
239 start of the list. (Doing this properly would require function
240 specifiers to be handled separately from storage class
242 BOOL_BITFIELD non_sc_seen_p
: 1;
243 /* Whether the type is specified by a typedef or typeof name. */
244 BOOL_BITFIELD typedef_p
: 1;
245 /* Whether a struct, union or enum type either had its content
246 defined by a type specifier in the list or was the first visible
247 declaration of its tag. */
248 BOOL_BITFIELD tag_defined_p
: 1;
249 /* Whether the type is explicitly "signed" or specified by a typedef
250 whose type is explicitly "signed". */
251 BOOL_BITFIELD explicit_signed_p
: 1;
252 /* Whether the specifiers include a deprecated typedef. */
253 BOOL_BITFIELD deprecated_p
: 1;
254 /* Whether the type defaulted to "int" because there were no type
256 BOOL_BITFIELD default_int_p
: 1;
257 /* Whether "long" was specified. */
258 BOOL_BITFIELD long_p
: 1;
259 /* Whether "long" was specified more than once. */
260 BOOL_BITFIELD long_long_p
: 1;
261 /* Whether "short" was specified. */
262 BOOL_BITFIELD short_p
: 1;
263 /* Whether "signed" was specified. */
264 BOOL_BITFIELD signed_p
: 1;
265 /* Whether "unsigned" was specified. */
266 BOOL_BITFIELD unsigned_p
: 1;
267 /* Whether "complex" was specified. */
268 BOOL_BITFIELD complex_p
: 1;
269 /* Whether "inline" was specified. */
270 BOOL_BITFIELD inline_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 /* Information about the parameters in a function declarator. */
301 /* A list of parameter decls. */
303 /* A list of structure, union and enum tags defined. */
305 /* A list of argument types to go in the FUNCTION_TYPE. */
307 /* A list of non-parameter decls (notably enumeration constants)
308 defined with the parameters. */
310 /* A VEC of VLA sizes from the parameters. In a function
311 definition, these are used to ensure that side-effects in sizes
312 of arrays converted to pointers (such as a parameter int i[n++])
313 take place; otherwise, they are ignored. */
314 VEC(tree
,gc
) *pending_sizes
;
315 /* True when these arguments had [*]. */
316 BOOL_BITFIELD had_vla_unspec
: 1;
320 struct c_declarator
{
321 /* The kind of declarator. */
322 enum c_declarator_kind kind
;
323 location_t id_loc
; /* Currently only set for cdk_id, cdk_array. */
324 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
325 struct c_declarator
*declarator
;
327 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
331 struct c_arg_info
*arg_info
;
334 /* The array dimension, or NULL for [] and [*]. */
336 /* The qualifiers inside []. */
338 /* The attributes (currently ignored) inside []. */
340 /* Whether [static] was used. */
341 BOOL_BITFIELD static_p
: 1;
342 /* Whether [*] was used. */
343 BOOL_BITFIELD vla_unspec_p
: 1;
345 /* For pointers, the qualifiers on the pointer type. */
347 /* For attributes. */
354 /* The declaration specifiers. */
355 struct c_declspecs
*specs
;
356 /* The declarator. */
357 struct c_declarator
*declarator
;
362 /* The declaration specifiers, minus any prefix attributes. */
363 struct c_declspecs
*specs
;
364 /* The attributes. */
366 /* The declarator. */
367 struct c_declarator
*declarator
;
370 /* Used when parsing an enum. Initialized by start_enum. */
371 struct c_enum_contents
373 /* While defining an enum type, this is 1 plus the last enumerator
375 tree enum_next_value
;
377 /* Nonzero means that there was overflow computing enum_next_value. */
381 /* A type of reference to a static identifier in an inline
383 enum c_inline_static_type
{
384 /* Identifier with internal linkage used in function that may be an
385 inline definition (i.e., file-scope static). */
387 /* Modifiable object with static storage duration defined in
388 function that may be an inline definition (i.e., local
395 extern void c_parse_init (void);
397 /* in c-aux-info.c */
398 extern void gen_aux_info_record (tree
, int, int, int);
401 struct c_spot_bindings
;
402 struct c_struct_parse_info
;
403 extern struct obstack parser_obstack
;
404 extern tree c_break_label
;
405 extern tree c_cont_label
;
407 extern int global_bindings_p (void);
408 extern void push_scope (void);
409 extern tree
pop_scope (void);
410 extern void c_bindings_start_stmt_expr (struct c_spot_bindings
*);
411 extern void c_bindings_end_stmt_expr (struct c_spot_bindings
*);
413 extern void record_inline_static (location_t
, tree
, tree
,
414 enum c_inline_static_type
);
415 extern void c_init_decl_processing (void);
416 extern void c_print_identifier (FILE *, tree
, int);
417 extern int quals_from_declspecs (const struct c_declspecs
*);
418 extern struct c_declarator
*build_array_declarator (location_t
, tree
,
419 struct c_declspecs
*,
421 extern tree
build_enumerator (location_t
, struct c_enum_contents
*, tree
, tree
);
422 extern tree
check_for_loop_decls (location_t
);
423 extern void mark_forward_parm_decls (void);
424 extern void declare_parm_level (void);
425 extern void undeclared_variable (location_t
, tree
);
426 extern tree
lookup_label_for_goto (location_t
, tree
);
427 extern tree
declare_label (tree
);
428 extern tree
define_label (location_t
, tree
);
429 extern struct c_spot_bindings
*c_get_switch_bindings (void);
430 extern void c_release_switch_bindings (struct c_spot_bindings
*);
431 extern bool c_check_switch_jump_warnings (struct c_spot_bindings
*,
432 location_t
, location_t
);
433 extern void finish_decl (tree
, location_t
, tree
, tree
, tree
);
434 extern tree
finish_enum (tree
, tree
, tree
);
435 extern void finish_function (void);
436 extern tree
finish_struct (location_t
, tree
, tree
, tree
,
437 struct c_struct_parse_info
*);
438 extern struct c_arg_info
*get_parm_info (bool);
439 extern tree
grokfield (location_t
, struct c_declarator
*,
440 struct c_declspecs
*, tree
, tree
*);
441 extern tree
groktypename (struct c_type_name
*, tree
*, bool *);
442 extern tree
grokparm (const struct c_parm
*);
443 extern tree
implicitly_declare (location_t
, tree
);
444 extern void keep_next_level (void);
445 extern void pending_xref_error (void);
446 extern void c_push_function_context (void);
447 extern void c_pop_function_context (void);
448 extern void push_parm_decl (const struct c_parm
*);
449 extern struct c_declarator
*set_array_declarator_inner (struct c_declarator
*,
450 struct c_declarator
*);
451 extern tree
c_builtin_function (tree
);
452 extern tree
c_builtin_function_ext_scope (tree
);
453 extern void shadow_tag (const struct c_declspecs
*);
454 extern void shadow_tag_warned (const struct c_declspecs
*, int);
455 extern tree
start_enum (location_t
, struct c_enum_contents
*, tree
);
456 extern int start_function (struct c_declspecs
*, struct c_declarator
*, tree
);
457 extern tree
start_decl (struct c_declarator
*, struct c_declspecs
*, bool,
459 extern tree
start_struct (location_t
, enum tree_code
, tree
,
460 struct c_struct_parse_info
**);
461 extern void store_parm_decls (void);
462 extern void store_parm_decls_from (struct c_arg_info
*);
463 extern tree
xref_tag (enum tree_code
, tree
);
464 extern struct c_typespec
parser_xref_tag (location_t
, enum tree_code
, tree
);
465 extern int c_expand_decl (tree
);
466 extern struct c_parm
*build_c_parm (struct c_declspecs
*, tree
,
467 struct c_declarator
*);
468 extern struct c_declarator
*build_attrs_declarator (tree
,
469 struct c_declarator
*);
470 extern struct c_declarator
*build_function_declarator (struct c_arg_info
*,
471 struct c_declarator
*);
472 extern struct c_declarator
*build_id_declarator (tree
);
473 extern struct c_declarator
*make_pointer_declarator (struct c_declspecs
*,
474 struct c_declarator
*);
475 extern struct c_declspecs
*build_null_declspecs (void);
476 extern struct c_declspecs
*declspecs_add_qual (struct c_declspecs
*, tree
);
477 extern struct c_declspecs
*declspecs_add_type (location_t
,
478 struct c_declspecs
*,
480 extern struct c_declspecs
*declspecs_add_scspec (struct c_declspecs
*, tree
);
481 extern struct c_declspecs
*declspecs_add_attrs (struct c_declspecs
*, tree
);
482 extern struct c_declspecs
*declspecs_add_addrspace (struct c_declspecs
*,
484 extern struct c_declspecs
*finish_declspecs (struct c_declspecs
*);
486 /* in c-objc-common.c */
487 extern bool c_objc_common_init (void);
488 extern bool c_missing_noreturn_ok_p (tree
);
489 extern bool c_warn_unused_global_decl (const_tree
);
490 extern void c_initialize_diagnostics (diagnostic_context
*);
491 extern bool c_vla_unspec_p (tree x
, tree fn
);
494 extern bool in_late_binary_op
;
495 extern int in_alignof
;
496 extern int in_sizeof
;
497 extern int in_typeof
;
499 extern struct c_switch
*c_switch_stack
;
501 extern tree
c_objc_common_truthvalue_conversion (location_t
, tree
);
502 extern tree
require_complete_type (tree
);
503 extern int same_translation_unit_p (const_tree
, const_tree
);
504 extern int comptypes (tree
, tree
);
505 extern int comptypes_check_different_types (tree
, tree
, bool *);
506 extern bool c_vla_type_p (const_tree
);
507 extern bool c_mark_addressable (tree
);
508 extern void c_incomplete_type_error (const_tree
, const_tree
);
509 extern tree
c_type_promotes_to (tree
);
510 extern struct c_expr
default_function_array_conversion (location_t
,
512 extern struct c_expr
default_function_array_read_conversion (location_t
,
514 extern void mark_exp_read (tree
);
515 extern tree
composite_type (tree
, tree
);
516 extern tree
build_component_ref (location_t
, tree
, tree
);
517 extern tree
build_array_ref (location_t
, tree
, tree
);
518 extern tree
build_external_ref (location_t
, tree
, int, tree
*);
519 extern void pop_maybe_used (bool);
520 extern struct c_expr
c_expr_sizeof_expr (location_t
, struct c_expr
);
521 extern struct c_expr
c_expr_sizeof_type (location_t
, struct c_type_name
*);
522 extern struct c_expr
parser_build_unary_op (location_t
, enum tree_code
,
524 extern struct c_expr
parser_build_binary_op (location_t
,
525 enum tree_code
, struct c_expr
,
527 extern tree
build_conditional_expr (location_t
, tree
, bool, tree
, tree
,
529 extern tree
build_compound_expr (location_t
, tree
, tree
);
530 extern tree
c_cast_expr (location_t
, struct c_type_name
*, tree
);
531 extern tree
build_c_cast (location_t
, tree
, tree
);
532 extern void store_init_value (location_t
, tree
, tree
, tree
);
533 extern void error_init (const char *);
534 extern void pedwarn_init (location_t
, int opt
, const char *);
535 extern void maybe_warn_string_init (tree
, struct c_expr
);
536 extern void start_init (tree
, tree
, int);
537 extern void finish_init (void);
538 extern void really_start_incremental_init (tree
);
539 extern void push_init_level (int, struct obstack
*);
540 extern struct c_expr
pop_init_level (int, struct obstack
*);
541 extern void set_init_index (tree
, tree
, struct obstack
*);
542 extern void set_init_label (tree
, struct obstack
*);
543 extern void process_init_element (struct c_expr
, bool, struct obstack
*);
544 extern tree
build_compound_literal (location_t
, tree
, tree
, bool);
545 extern void check_compound_literal_type (location_t
, struct c_type_name
*);
546 extern tree
c_start_case (location_t
, location_t
, tree
);
547 extern void c_finish_case (tree
);
548 extern tree
build_asm_expr (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
549 extern tree
build_asm_stmt (tree
, tree
);
550 extern int c_types_compatible_p (tree
, tree
);
551 extern tree
c_begin_compound_stmt (bool);
552 extern tree
c_end_compound_stmt (location_t
, tree
, bool);
553 extern void c_finish_if_stmt (location_t
, tree
, tree
, tree
, bool);
554 extern void c_finish_loop (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
555 extern tree
c_begin_stmt_expr (void);
556 extern tree
c_finish_stmt_expr (location_t
, tree
);
557 extern tree
c_process_expr_stmt (location_t
, tree
);
558 extern tree
c_finish_expr_stmt (location_t
, tree
);
559 extern tree
c_finish_return (location_t
, tree
, tree
);
560 extern tree
c_finish_bc_stmt (location_t
, tree
*, bool);
561 extern tree
c_finish_goto_label (location_t
, tree
);
562 extern tree
c_finish_goto_ptr (location_t
, tree
);
563 extern tree
c_expr_to_decl (tree
, bool *, bool *);
564 extern tree
c_begin_omp_parallel (void);
565 extern tree
c_finish_omp_parallel (location_t
, tree
, tree
);
566 extern tree
c_begin_omp_task (void);
567 extern tree
c_finish_omp_task (location_t
, tree
, tree
);
568 extern tree
c_finish_omp_clauses (tree
);
569 extern tree
c_build_va_arg (location_t
, tree
, tree
);
571 /* Set to 0 at beginning of a function definition, set to 1 if
572 a return statement that specifies a return value is seen. */
574 extern int current_function_returns_value
;
576 /* Set to 0 at beginning of a function definition, set to 1 if
577 a return statement with no argument is seen. */
579 extern int current_function_returns_null
;
581 /* Set to 0 at beginning of a function definition, set to 1 if
582 a call to a noreturn function is seen. */
584 extern int current_function_returns_abnormally
;
586 /* Nonzero means we are reading code that came from a system header file. */
588 extern int system_header_p
;
590 /* True means global_bindings_p should return false even if the scope stack
591 says we are in file scope. */
593 extern bool c_override_global_bindings_to_false
;
596 extern void c_finish_incomplete_decl (tree
);
597 extern void c_write_global_declarations (void);
600 extern void pedwarn_c90 (location_t
, int opt
, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
601 extern void pedwarn_c99 (location_t
, int opt
, const char *, ...) ATTRIBUTE_GCC_DIAG(3,4);
603 #endif /* ! GCC_C_TREE_H */