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1 38 julius
/* Definitions for C parsing and type checking.
2
   Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
3
   2002, 2003, 2004, 2005, 2007  Free Software Foundation, Inc.
4
 
5
This file is part of GCC.
6
 
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 3, or (at your option) any later
10
version.
11
 
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.
16
 
17
You should have received a copy of the GNU General Public License
18
along with GCC; see the file COPYING3.  If not see
19
<http://www.gnu.org/licenses/>.  */
20
 
21
#ifndef GCC_C_TREE_H
22
#define GCC_C_TREE_H
23
 
24
#include "c-common.h"
25
#include "toplev.h"
26
#include "diagnostic.h"
27
 
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 *))
32
 
33
/* Language-specific declaration information.  */
34
 
35
struct lang_decl GTY(())
36
{
37
  char dummy;
38
};
39
 
40
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only.  */
41
#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
42
 
43
/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile.  */
44
#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
45
 
46
/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
47
   nonzero if the definition of the type has already started.  */
48
#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
49
 
50
/* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
51
   declarations whose type would be completed by completing that type.  */
52
#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
53
 
54
/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
55
   keyword.  C_RID_CODE (node) is then the RID_* value of the keyword,
56
   and C_RID_YYCODE is the token number wanted by Yacc.  */
57
#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
58
 
59
struct lang_type GTY(())
60
{
61
  /* In a RECORD_TYPE, a sorted array of the fields of the type.  */
62
  struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
63
  /* In an ENUMERAL_TYPE, the min and max values.  */
64
  tree enum_min;
65
  tree enum_max;
66
  /* In a RECORD_TYPE, information specific to Objective-C, such
67
     as a list of adopted protocols or a pointer to a corresponding
68
     @interface.  See objc/objc-act.h for details.  */
69
  tree objc_info;
70
};
71
 
72
/* Record whether a type or decl was written with nonconstant size.
73
   Note that TYPE_SIZE may have simplified to a constant.  */
74
#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
75
#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
76
 
77
/* Record whether a typedef for type `int' was actually `signed int'.  */
78
#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
79
 
80
/* For a FUNCTION_DECL, nonzero if it was defined without an explicit
81
   return type.  */
82
#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
83
 
84
/* For a FUNCTION_DECL, nonzero if it was an implicit declaration.  */
85
#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
86
 
87
/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
88
   been declared.  */
89
#define C_DECL_DECLARED_BUILTIN(EXP)            \
90
  DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
91
 
92
/* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
93
   built-in prototype and does not have a non-built-in prototype.  */
94
#define C_DECL_BUILTIN_PROTOTYPE(EXP)           \
95
  DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
96
 
97
/* Record whether a decl was declared register.  This is strictly a
98
   front-end flag, whereas DECL_REGISTER is used for code generation;
99
   they may differ for structures with volatile fields.  */
100
#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
101
 
102
/* Record whether a decl was used in an expression anywhere except an
103
   unevaluated operand of sizeof / typeof / alignof.  This is only
104
   used for functions declared static but not defined, though outside
105
   sizeof and typeof it is set for other function decls as well.  */
106
#define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
107
 
108
/* Record whether a label was defined in a statement expression which
109
   has finished and so can no longer be jumped to.  */
110
#define C_DECL_UNJUMPABLE_STMT_EXPR(EXP)        \
111
  DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP))
112
 
113
/* Record whether a label was the subject of a goto from outside the
114
   current level of statement expression nesting and so cannot be
115
   defined right now.  */
116
#define C_DECL_UNDEFINABLE_STMT_EXPR(EXP)       \
117
  DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP))
118
 
119
/* Record whether a label was defined in the scope of an identifier
120
   with variably modified type which has finished and so can no longer
121
   be jumped to.  */
122
#define C_DECL_UNJUMPABLE_VM(EXP)       \
123
  DECL_LANG_FLAG_3 (LABEL_DECL_CHECK (EXP))
124
 
125
/* Record whether a label was the subject of a goto from outside the
126
   current level of scopes of identifiers with variably modified type
127
   and so cannot be defined right now.  */
128
#define C_DECL_UNDEFINABLE_VM(EXP)      \
129
  DECL_LANG_FLAG_5 (LABEL_DECL_CHECK (EXP))
130
 
131
/* Record whether a variable has been declared threadprivate by
132
   #pragma omp threadprivate.  */
133
#define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
134
 
135
/* Nonzero for a decl which either doesn't exist or isn't a prototype.
136
   N.B. Could be simplified if all built-in decls had complete prototypes
137
   (but this is presently difficult because some of them need FILE*).  */
138
#define C_DECL_ISNT_PROTOTYPE(EXP)                      \
139
       (EXP == 0                                 \
140
        || (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0        \
141
            && !DECL_BUILT_IN (EXP)))
142
 
143
/* For FUNCTION_TYPE, a hidden list of types of arguments.  The same as
144
   TYPE_ARG_TYPES for functions with prototypes, but created for functions
145
   without prototypes.  */
146
#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
147
 
148
/* Record parser information about an expression that is irrelevant
149
   for code generation alongside a tree representing its value.  */
150
struct c_expr
151
{
152
  /* The value of the expression.  */
153
  tree value;
154
  /* Record the original binary operator of an expression, which may
155
     have been changed by fold, STRING_CST for unparenthesized string
156
     constants, or ERROR_MARK for other expressions (including
157
     parenthesized expressions).  */
158
  enum tree_code original_code;
159
};
160
 
161
/* A kind of type specifier.  Note that this information is currently
162
   only used to distinguish tag definitions, tag references and typeof
163
   uses.  */
164
enum c_typespec_kind {
165
  /* A reserved keyword type specifier.  */
166
  ctsk_resword,
167
  /* A reference to a tag, previously declared, such as "struct foo".
168
     This includes where the previous declaration was as a different
169
     kind of tag, in which case this is only valid if shadowing that
170
     tag in an inner scope.  */
171
  ctsk_tagref,
172
  /* A reference to a tag, not previously declared in a visible
173
     scope.  */
174
  ctsk_tagfirstref,
175
  /* A definition of a tag such as "struct foo { int a; }".  */
176
  ctsk_tagdef,
177
  /* A typedef name.  */
178
  ctsk_typedef,
179
  /* An ObjC-specific kind of type specifier.  */
180
  ctsk_objc,
181
  /* A typeof specifier.  */
182
  ctsk_typeof
183
};
184
 
185
/* A type specifier: this structure is created in the parser and
186
   passed to declspecs_add_type only.  */
187
struct c_typespec {
188
  /* What kind of type specifier this is.  */
189
  enum c_typespec_kind kind;
190
  /* The specifier itself.  */
191
  tree spec;
192
};
193
 
194
/* A storage class specifier.  */
195
enum c_storage_class {
196
  csc_none,
197
  csc_auto,
198
  csc_extern,
199
  csc_register,
200
  csc_static,
201
  csc_typedef
202
};
203
 
204
/* A type specifier keyword "void", "_Bool", "char", "int", "float",
205
   "double", or none of these.  */
206
enum c_typespec_keyword {
207
  cts_none,
208
  cts_void,
209
  cts_bool,
210
  cts_char,
211
  cts_int,
212
  cts_float,
213
  cts_double,
214
  cts_dfloat32,
215
  cts_dfloat64,
216
  cts_dfloat128
217
};
218
 
219
/* A sequence of declaration specifiers in C.  */
220
struct c_declspecs {
221
  /* The type specified, if a single type specifier such as a struct,
222
     union or enum specifier, typedef name or typeof specifies the
223
     whole type, or NULL_TREE if none or a keyword such as "void" or
224
     "char" is used.  Does not include qualifiers.  */
225
  tree type;
226
  /* The attributes from a typedef decl.  */
227
  tree decl_attr;
228
  /* When parsing, the attributes.  Outside the parser, this will be
229
     NULL; attributes (possibly from multiple lists) will be passed
230
     separately.  */
231
  tree attrs;
232
  /* Any type specifier keyword used such as "int", not reflecting
233
     modifiers such as "short", or cts_none if none.  */
234
  enum c_typespec_keyword typespec_word;
235
  /* The storage class specifier, or csc_none if none.  */
236
  enum c_storage_class storage_class;
237
  /* Whether any declaration specifiers have been seen at all.  */
238
  BOOL_BITFIELD declspecs_seen_p : 1;
239
  /* Whether a type specifier has been seen.  */
240
  BOOL_BITFIELD type_seen_p : 1;
241
  /* Whether something other than a storage class specifier or
242
     attribute has been seen.  This is used to warn for the
243
     obsolescent usage of storage class specifiers other than at the
244
     start of the list.  (Doing this properly would require function
245
     specifiers to be handled separately from storage class
246
     specifiers.)  */
247
  BOOL_BITFIELD non_sc_seen_p : 1;
248
  /* Whether the type is specified by a typedef or typeof name.  */
249
  BOOL_BITFIELD typedef_p : 1;
250
  /* Whether a struct, union or enum type either had its content
251
     defined by a type specifier in the list or was the first visible
252
     declaration of its tag.  */
253
  BOOL_BITFIELD tag_defined_p : 1;
254
  /* Whether the type is explicitly "signed" or specified by a typedef
255
     whose type is explicitly "signed".  */
256
  BOOL_BITFIELD explicit_signed_p : 1;
257
  /* Whether the specifiers include a deprecated typedef.  */
258
  BOOL_BITFIELD deprecated_p : 1;
259
  /* Whether the type defaulted to "int" because there were no type
260
     specifiers.  */
261
  BOOL_BITFIELD default_int_p;
262
  /* Whether "long" was specified.  */
263
  BOOL_BITFIELD long_p : 1;
264
  /* Whether "long" was specified more than once.  */
265
  BOOL_BITFIELD long_long_p : 1;
266
  /* Whether "short" was specified.  */
267
  BOOL_BITFIELD short_p : 1;
268
  /* Whether "signed" was specified.  */
269
  BOOL_BITFIELD signed_p : 1;
270
  /* Whether "unsigned" was specified.  */
271
  BOOL_BITFIELD unsigned_p : 1;
272
  /* Whether "complex" was specified.  */
273
  BOOL_BITFIELD complex_p : 1;
274
  /* Whether "inline" was specified.  */
275
  BOOL_BITFIELD inline_p : 1;
276
  /* Whether "__thread" was specified.  */
277
  BOOL_BITFIELD thread_p : 1;
278
  /* Whether "const" was specified.  */
279
  BOOL_BITFIELD const_p : 1;
280
  /* Whether "volatile" was specified.  */
281
  BOOL_BITFIELD volatile_p : 1;
282
  /* Whether "restrict" was specified.  */
283
  BOOL_BITFIELD restrict_p : 1;
284
};
285
 
286
/* The various kinds of declarators in C.  */
287
enum c_declarator_kind {
288
  /* An identifier.  */
289
  cdk_id,
290
  /* A function.  */
291
  cdk_function,
292
  /* An array.  */
293
  cdk_array,
294
  /* A pointer.  */
295
  cdk_pointer,
296
  /* Parenthesized declarator with nested attributes.  */
297
  cdk_attrs
298
};
299
 
300
/* Information about the parameters in a function declarator.  */
301
struct c_arg_info {
302
  /* A list of parameter decls.  */
303
  tree parms;
304
  /* A list of structure, union and enum tags defined.  */
305
  tree tags;
306
  /* A list of argument types to go in the FUNCTION_TYPE.  */
307
  tree types;
308
  /* A list of non-parameter decls (notably enumeration constants)
309
     defined with the parameters.  */
310
  tree others;
311
  /* A list of VLA sizes from the parameters.  In a function
312
     definition, these are used to ensure that side-effects in sizes
313
     of arrays converted to pointers (such as a parameter int i[n++])
314
     take place; otherwise, they are ignored.  */
315
  tree pending_sizes;
316
  /* True when these arguments had [*].  */
317
  BOOL_BITFIELD had_vla_unspec : 1;
318
};
319
 
320
/* A declarator.  */
321
struct c_declarator {
322
  /* The kind of declarator.  */
323
  enum c_declarator_kind kind;
324
  /* Except for cdk_id, the contained declarator.  For cdk_id, NULL.  */
325
  struct c_declarator *declarator;
326
  location_t id_loc; /* Currently only set for cdk_id. */
327
  union {
328
    /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
329
       declarator.  */
330
    tree id;
331
    /* For functions.  */
332
    struct c_arg_info *arg_info;
333
    /* For arrays.  */
334
    struct {
335
      /* The array dimension, or NULL for [] and [*].  */
336
      tree dimen;
337
      /* The qualifiers inside [].  */
338
      int quals;
339
      /* The attributes (currently ignored) inside [].  */
340
      tree attrs;
341
      /* Whether [static] was used.  */
342
      BOOL_BITFIELD static_p : 1;
343
      /* Whether [*] was used.  */
344
      BOOL_BITFIELD vla_unspec_p : 1;
345
    } array;
346
    /* For pointers, the qualifiers on the pointer type.  */
347
    int pointer_quals;
348
    /* For attributes.  */
349
    tree attrs;
350
  } u;
351
};
352
 
353
/* A type name.  */
354
struct c_type_name {
355
  /* The declaration specifiers.  */
356
  struct c_declspecs *specs;
357
  /* The declarator.  */
358
  struct c_declarator *declarator;
359
};
360
 
361
/* A parameter.  */
362
struct c_parm {
363
  /* The declaration specifiers, minus any prefix attributes.  */
364
  struct c_declspecs *specs;
365
  /* The attributes.  */
366
  tree attrs;
367
  /* The declarator.  */
368
  struct c_declarator *declarator;
369
};
370
 
371
/* Save and restore the variables in this file and elsewhere
372
   that keep track of the progress of compilation of the current function.
373
   Used for nested functions.  */
374
 
375
struct language_function GTY(())
376
{
377
  struct c_language_function base;
378
  tree x_break_label;
379
  tree x_cont_label;
380
  struct c_switch * GTY((skip)) x_switch_stack;
381
  struct c_arg_info * GTY((skip)) arg_info;
382
  int returns_value;
383
  int returns_null;
384
  int returns_abnormally;
385
  int warn_about_return_type;
386
  int extern_inline;
387
};
388
 
389
/* Save lists of labels used or defined in particular contexts.
390
   Allocated on the parser obstack.  */
391
 
392
struct c_label_list
393
{
394
  /* The label at the head of the list.  */
395
  tree label;
396
  /* The rest of the list.  */
397
  struct c_label_list *next;
398
};
399
 
400
/* Statement expression context.  */
401
 
402
struct c_label_context_se
403
{
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;
410
};
411
 
412
/* Context of variably modified declarations.  */
413
 
414
struct c_label_context_vm
415
{
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;
426
};
427
 
428
 
429
/* in c-parser.c */
430
extern void c_parse_init (void);
431
 
432
/* in c-aux-info.c */
433
extern void gen_aux_info_record (tree, int, int, int);
434
 
435
/* in c-decl.c */
436
extern struct obstack parser_obstack;
437
extern tree c_break_label;
438
extern tree c_cont_label;
439
 
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);
445
 
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 builtin_function (const char *, tree, int, enum built_in_class,
478
                              const char *, tree);
479
extern void shadow_tag (const struct c_declspecs *);
480
extern void shadow_tag_warned (const struct c_declspecs *, int);
481
extern tree start_enum (tree);
482
extern int  start_function (struct c_declspecs *, struct c_declarator *, tree);
483
extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
484
                        tree);
485
extern tree start_struct (enum tree_code, tree);
486
extern void store_parm_decls (void);
487
extern void store_parm_decls_from (struct c_arg_info *);
488
extern tree xref_tag (enum tree_code, tree);
489
extern struct c_typespec parser_xref_tag (enum tree_code, tree);
490
extern int c_expand_decl (tree);
491
extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
492
                                    struct c_declarator *);
493
extern struct c_declarator *build_attrs_declarator (tree,
494
                                                    struct c_declarator *);
495
extern struct c_declarator *build_function_declarator (struct c_arg_info *,
496
                                                       struct c_declarator *);
497
extern struct c_declarator *build_id_declarator (tree);
498
extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
499
                                                     struct c_declarator *);
500
extern struct c_declspecs *build_null_declspecs (void);
501
extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
502
extern struct c_declspecs *declspecs_add_type (struct c_declspecs *,
503
                                               struct c_typespec);
504
extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
505
extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
506
extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
507
 
508
/* in c-objc-common.c */
509
extern int c_disregard_inline_limits (tree);
510
extern int c_cannot_inline_tree_fn (tree *);
511
extern bool c_objc_common_init (void);
512
extern bool c_missing_noreturn_ok_p (tree);
513
extern tree c_objc_common_truthvalue_conversion (tree expr);
514
extern bool c_warn_unused_global_decl (tree);
515
extern void c_initialize_diagnostics (diagnostic_context *);
516
extern bool c_vla_unspec_p (tree x, tree fn);
517
 
518
#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P)           \
519
  c_build_qualified_type ((TYPE),                                 \
520
                          ((CONST_P) ? TYPE_QUAL_CONST : 0) |      \
521
                          ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
522
 
523
/* in c-typeck.c */
524
extern int in_alignof;
525
extern int in_sizeof;
526
extern int in_typeof;
527
 
528
extern struct c_switch *c_switch_stack;
529
extern struct c_label_context_se *label_context_stack_se;
530
extern struct c_label_context_vm *label_context_stack_vm;
531
 
532
extern tree require_complete_type (tree);
533
extern int same_translation_unit_p (tree, tree);
534
extern int comptypes (tree, tree);
535
extern bool c_vla_type_p (tree);
536
extern bool c_mark_addressable (tree);
537
extern void c_incomplete_type_error (tree, tree);
538
extern tree c_type_promotes_to (tree);
539
extern struct c_expr default_function_array_conversion (struct c_expr);
540
extern tree composite_type (tree, tree);
541
extern tree build_component_ref (tree, tree);
542
extern tree build_array_ref (tree, tree);
543
extern tree build_external_ref (tree, int, location_t);
544
extern void pop_maybe_used (bool);
545
extern struct c_expr c_expr_sizeof_expr (struct c_expr);
546
extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
547
extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr);
548
extern struct c_expr parser_build_binary_op (enum tree_code, struct c_expr,
549
                                             struct c_expr);
550
extern tree build_conditional_expr (tree, tree, tree);
551
extern tree build_compound_expr (tree, tree);
552
extern tree c_cast_expr (struct c_type_name *, tree);
553
extern tree build_c_cast (tree, tree);
554
extern void store_init_value (tree, tree);
555
extern void error_init (const char *);
556
extern void pedwarn_init (const char *);
557
extern void maybe_warn_string_init (tree, struct c_expr);
558
extern void start_init (tree, tree, int);
559
extern void finish_init (void);
560
extern void really_start_incremental_init (tree);
561
extern void push_init_level (int);
562
extern struct c_expr pop_init_level (int);
563
extern void set_init_index (tree, tree);
564
extern void set_init_label (tree);
565
extern void process_init_element (struct c_expr);
566
extern tree build_compound_literal (tree, tree);
567
extern tree c_start_case (tree);
568
extern void c_finish_case (tree);
569
extern tree build_asm_expr (tree, tree, tree, tree, bool);
570
extern tree build_asm_stmt (tree, tree);
571
extern tree c_convert_parm_for_inlining (tree, tree, tree, int);
572
extern int c_types_compatible_p (tree, tree);
573
extern tree c_begin_compound_stmt (bool);
574
extern tree c_end_compound_stmt (tree, bool);
575
extern void c_finish_if_stmt (location_t, tree, tree, tree, bool);
576
extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
577
extern tree c_begin_stmt_expr (void);
578
extern tree c_finish_stmt_expr (tree);
579
extern tree c_process_expr_stmt (tree);
580
extern tree c_finish_expr_stmt (tree);
581
extern tree c_finish_return (tree);
582
extern tree c_finish_bc_stmt (tree *, bool);
583
extern tree c_finish_goto_label (tree);
584
extern tree c_finish_goto_ptr (tree);
585
extern void c_begin_vm_scope (unsigned int);
586
extern void c_end_vm_scope (unsigned int);
587
extern tree c_expr_to_decl (tree, bool *, bool *, bool *);
588
extern tree c_begin_omp_parallel (void);
589
extern tree c_finish_omp_parallel (tree, tree);
590
extern tree c_finish_omp_clauses (tree);
591
 
592
/* Set to 0 at beginning of a function definition, set to 1 if
593
   a return statement that specifies a return value is seen.  */
594
 
595
extern int current_function_returns_value;
596
 
597
/* Set to 0 at beginning of a function definition, set to 1 if
598
   a return statement with no argument is seen.  */
599
 
600
extern int current_function_returns_null;
601
 
602
/* Set to 0 at beginning of a function definition, set to 1 if
603
   a call to a noreturn function is seen.  */
604
 
605
extern int current_function_returns_abnormally;
606
 
607
/* Nonzero means we are reading code that came from a system header file.  */
608
 
609
extern int system_header_p;
610
 
611
/* True means global_bindings_p should return false even if the scope stack
612
   says we are in file scope.  */
613
 
614
extern bool c_override_global_bindings_to_false;
615
 
616
/* True means we've initialized exception handling.  */
617
extern bool c_eh_initialized_p;
618
 
619
/* In c-decl.c */
620
extern void c_finish_incomplete_decl (tree);
621
extern void c_write_global_declarations (void);
622
 
623
/* In order for the format checking to accept the C frontend
624
   diagnostic framework extensions, you must include this file before
625
   toplev.h, not after.  */
626
#if GCC_VERSION >= 4001
627
#define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
628
#else
629
#define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
630
#endif
631
 
632
extern void pedwarn_c90 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
633
extern void pedwarn_c99 (const char *, ...) ATTRIBUTE_GCC_CDIAG(1,2);
634
 
635
#endif /* ! GCC_C_TREE_H */

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