1/* Definitions for C parsing and type checking.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free

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29/* The limbo_value is used for block level extern declarations, which need
30 to be type checked against subsequent extern declarations. They can't
31 be referenced after they fall out of scope, so they can't be global.
32
33 The rid_code field is used for keywords. It is in all
34 lang_identifier nodes, because some keywords are only special in a
35 particular context. */
36
37struct lang_identifier
38{
39 struct c_common_identifier ignore;
40 tree global_value, local_value, label_value, implicit_decl;
41 tree error_locus, limbo_value;
42};
43
44/* Language-specific declaration information. */
45
46struct lang_decl
47{
48 struct c_lang_decl base;
49 /* The return types and parameter types may have variable size.
50 This is a list of any SAVE_EXPRs that need to be evaluated to
51 compute those sizes. */
52 tree pending_sizes;
53};
54

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102
103/* This function was declared inline. This flag controls the linkage
104 semantics of 'inline'; whether or not the function is inlined is
105 controlled by DECL_INLINE. */
106#define DECL_DECLARED_INLINE_P(NODE) \
107 (DECL_LANG_SPECIFIC (NODE)->base.declared_inline)
108
109/* In a RECORD_TYPE, a sorted array of the fields of the type. */
110struct lang_type
111{
112 int len;
113 tree elts[1];
114};
115
116/* Record whether a type or decl was written with nonconstant size.
117 Note that TYPE_SIZE may have simplified to a constant. */
118#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
119#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
120
121#if 0 /* Not used. */

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145 TYPE_ARG_TYPES for functions with prototypes, but created for functions
146 without prototypes. */
147#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_BINFO (NODE)
148
149
150/* in c-lang.c and objc-act.c */
151extern tree lookup_interface PARAMS ((tree));
152extern tree is_class_name PARAMS ((tree));
153extern void maybe_objc_check_decl PARAMS ((tree));
154extern void finish_file PARAMS ((void));
155extern int maybe_objc_comptypes PARAMS ((tree, tree, int));
156extern tree maybe_building_objc_message_expr PARAMS ((void));
157extern int recognize_objc_keyword PARAMS ((void));
158extern tree lookup_objc_ivar PARAMS ((tree));
159
160
161/* in c-parse.in */
162extern void c_parse_init PARAMS ((void));
163extern void c_set_yydebug PARAMS ((int));
164extern int yyparse_1 PARAMS ((void));
165
166/* in c-aux-info.c */
167extern void gen_aux_info_record PARAMS ((tree, int, int, int));
168
169/* in c-decl.c */
170extern void c_init_decl_processing PARAMS ((void));
171extern void c_print_identifier PARAMS ((FILE *, tree, int));
172extern tree build_array_declarator PARAMS ((tree, tree, int, int));
173extern tree build_enumerator PARAMS ((tree, tree));
174extern int c_decode_option PARAMS ((int, char **));
175extern void c_mark_varargs PARAMS ((void));
176extern void check_for_loop_decls PARAMS ((void));
177extern void clear_parm_order PARAMS ((void));
178extern int complete_array_type PARAMS ((tree, tree, int));
179extern void declare_parm_level PARAMS ((int));
180extern tree define_label PARAMS ((const char *, int,
181 tree));
182extern void finish_decl PARAMS ((tree, tree, tree));
183extern tree finish_enum PARAMS ((tree, tree, tree));
184extern void finish_function PARAMS ((int, int));
185extern tree finish_struct PARAMS ((tree, tree, tree));
186extern tree get_parm_info PARAMS ((int));
187extern tree grokfield PARAMS ((const char *, int, tree, tree, tree));
188extern tree groktypename PARAMS ((tree));
189extern tree groktypename_in_parm_context PARAMS ((tree));
190extern tree implicitly_declare PARAMS ((tree));
191extern void implicit_decl_warning PARAMS ((tree));
192extern int in_parm_level_p PARAMS ((void));
193extern void keep_next_level PARAMS ((void));
194extern int kept_level_p PARAMS ((void));
195extern tree lookup_name PARAMS ((tree));
196extern tree lookup_name_current_level PARAMS ((tree));
197extern void parmlist_tags_warning PARAMS ((void));
198extern void pending_xref_error PARAMS ((void));
199extern void mark_c_function_context PARAMS ((struct function *));
200extern void push_c_function_context PARAMS ((struct function *));
201extern void pop_c_function_context PARAMS ((struct function *));
202extern void pop_label_level PARAMS ((void));
203extern void push_label_level PARAMS ((void));
204extern void push_parm_decl PARAMS ((tree));
205extern tree pushdecl_top_level PARAMS ((tree));
206extern void pushtag PARAMS ((tree, tree));
207extern tree set_array_declarator_type PARAMS ((tree, tree, int));
208extern tree shadow_label PARAMS ((tree));
209extern void shadow_tag PARAMS ((tree));
210extern void shadow_tag_warned PARAMS ((tree, int));
211extern tree start_enum PARAMS ((tree));
212extern int start_function PARAMS ((tree, tree, tree));
213extern tree start_decl PARAMS ((tree, tree, int,
214 tree));
215extern tree start_struct PARAMS ((enum tree_code, tree));
216extern void store_parm_decls PARAMS ((void));
217extern tree xref_tag PARAMS ((enum tree_code, tree));
218extern tree c_begin_compound_stmt PARAMS ((void));
219extern void c_expand_deferred_function PARAMS ((tree));
220extern void c_expand_decl_stmt PARAMS ((tree));
221
222
223/* in c-objc-common.c */
224extern int c_disregard_inline_limits PARAMS ((tree));
225extern int c_cannot_inline_tree_fn PARAMS ((tree *));
226extern const char *c_objc_common_init PARAMS ((const char *));
227extern int c_missing_noreturn_ok_p PARAMS ((tree));
228extern void c_objc_common_finish_file PARAMS ((void));
229extern int defer_fn PARAMS ((tree));
230
231#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \
232 c_build_qualified_type ((TYPE), \
233 ((CONST_P) ? TYPE_QUAL_CONST : 0) | \
234 ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
235
236/* in c-typeck.c */
237extern tree require_complete_type PARAMS ((tree));
238extern int comptypes PARAMS ((tree, tree));
239extern tree c_sizeof_nowarn PARAMS ((tree));
240extern tree c_size_in_bytes PARAMS ((tree));
241extern tree build_component_ref PARAMS ((tree, tree));
242extern tree build_indirect_ref PARAMS ((tree, const char *));
243extern tree build_array_ref PARAMS ((tree, tree));
244extern tree build_external_ref PARAMS ((tree, int));
245extern tree parser_build_binary_op PARAMS ((enum tree_code,
246 tree, tree));
247extern void readonly_warning PARAMS ((tree, const char *));
248extern tree build_conditional_expr PARAMS ((tree, tree, tree));
249extern tree build_compound_expr PARAMS ((tree));
250extern tree c_cast_expr PARAMS ((tree, tree));
251extern tree build_c_cast PARAMS ((tree, tree));
252extern tree build_modify_expr PARAMS ((tree, enum tree_code,
253 tree));
254extern void store_init_value PARAMS ((tree, tree));

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282
283extern int current_function_returns_null;
284
285/* Set to 0 at beginning of a function definition, set to 1 if
286 a call to a noreturn function is seen. */
287
288extern int current_function_returns_abnormally;
289
290/* Nonzero means `$' can be in an identifier. */
291
292extern int dollars_in_ident;
293
294/* Nonzero means allow type mismatches in conditional expressions;
295 just make their values `void'. */
296
297extern int flag_cond_mismatch;
298
299/* Nonzero means don't recognize the keyword `asm'. */
300
301extern int flag_no_asm;
302
303/* Nonzero means warn about implicit declarations. */
304
305extern int warn_implicit;
306
307/* Nonzero means warn for all old-style non-prototype function decls. */
308
309extern int warn_strict_prototypes;
310
311/* Nonzero means warn about multiple (redundant) decls for the same single
312 variable or function. */
313
314extern int warn_redundant_decls;
315
316/* Nonzero means warn about extern declarations of objects not at
317 file-scope level and about *all* declarations of functions (whether
318 extern or static) not at file-scope level. Note that we exclude
319 implicit function declarations. To get warnings about those, use
320 -Wimplicit. */
321
322extern int warn_nested_externs;
323
324/* Nonzero means warn about pointer casts that can drop a type qualifier
325 from the pointer target type. */
326
327extern int warn_cast_qual;
328
329/* Nonzero means warn when casting a function call to a type that does
330 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
331 when there is no previous declaration of sqrt or malloc. */
332
333extern int warn_bad_function_cast;
334
335/* Warn about traditional constructs whose meanings changed in ANSI C. */
336
337extern int warn_traditional;
338
339/* Warn about a subscript that has type char. */
340
341extern int warn_char_subscripts;
342
343/* Warn if main is suspicious. */
344
345extern int warn_main;
346
347/* Nonzero means to allow single precision math even if we're generally
348 being traditional. */
349extern int flag_allow_single_precision;
350
351/* Warn if initializer is not completely bracketed. */
352
353extern int warn_missing_braces;
354
355/* Warn about comparison of signed and unsigned values. */
356
357extern int warn_sign_compare;
358
359/* Warn about testing equality of floating point numbers. */
360
361extern int warn_float_equal;
362
363/* Warn about multicharacter constants. */
364
365extern int warn_multichar;
366
367/* Nonzero means we are reading code that came from a system header file. */
368
369extern int system_header_p;
370
371/* Warn about implicit declarations. 1 = warning, 2 = error. */
372extern int mesg_implicit_function_declaration;
373
374/* In c-decl.c */
375extern void finish_incomplete_decl PARAMS ((tree));
376
377extern tree static_ctors;
378extern tree static_dtors;
379
380#endif /* ! GCC_C_TREE_H */