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40754343 | 1 | /* Definitions for C parsing and type checking. |
3c71940f JL |
2 | Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998, |
3 | 1999, 2000 Free Software Foundation, Inc. | |
40754343 RS |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
940d9d63 RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
40754343 | 21 | |
7c57c798 RS |
22 | #ifndef _C_TREE_H |
23 | #define _C_TREE_H | |
cf1c49cb | 24 | |
7f4edbcb BS |
25 | #include "c-common.h" |
26 | ||
40754343 RS |
27 | /* Language-dependent contents of an identifier. */ |
28 | ||
ff92a691 JW |
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 | ||
40754343 RS |
33 | struct lang_identifier |
34 | { | |
35 | struct tree_identifier ignore; | |
36 | tree global_value, local_value, label_value, implicit_decl; | |
f2a02c3a | 37 | tree error_locus, limbo_value; |
40754343 RS |
38 | }; |
39 | ||
40 | /* Macros for access to language-specific slots in an identifier. */ | |
db69cfcb | 41 | /* Each of these slots contains a DECL node or null. */ |
40754343 | 42 | |
db69cfcb RS |
43 | /* This represents the value which the identifier has in the |
44 | file-scope namespace. */ | |
40754343 | 45 | #define IDENTIFIER_GLOBAL_VALUE(NODE) \ |
0f41302f | 46 | (((struct lang_identifier *) (NODE))->global_value) |
db69cfcb RS |
47 | /* This represents the value which the identifier has in the current |
48 | scope. */ | |
40754343 | 49 | #define IDENTIFIER_LOCAL_VALUE(NODE) \ |
0f41302f | 50 | (((struct lang_identifier *) (NODE))->local_value) |
db69cfcb RS |
51 | /* This represents the value which the identifier has as a label in |
52 | the current label scope. */ | |
40754343 | 53 | #define IDENTIFIER_LABEL_VALUE(NODE) \ |
0f41302f | 54 | (((struct lang_identifier *) (NODE))->label_value) |
db69cfcb RS |
55 | /* This records the extern decl of this identifier, if it has had one |
56 | at any point in this compilation. */ | |
f2a02c3a | 57 | #define IDENTIFIER_LIMBO_VALUE(NODE) \ |
0f41302f | 58 | (((struct lang_identifier *) (NODE))->limbo_value) |
db69cfcb RS |
59 | /* This records the implicit function decl of this identifier, if it |
60 | has had one at any point in this compilation. */ | |
40754343 | 61 | #define IDENTIFIER_IMPLICIT_DECL(NODE) \ |
0f41302f | 62 | (((struct lang_identifier *) (NODE))->implicit_decl) |
db69cfcb RS |
63 | /* This is the last function in which we printed an "undefined variable" |
64 | message for this identifier. Value is a FUNCTION_DECL or null. */ | |
40754343 | 65 | #define IDENTIFIER_ERROR_LOCUS(NODE) \ |
0f41302f | 66 | (((struct lang_identifier *) (NODE))->error_locus) |
40754343 RS |
67 | |
68 | /* In identifiers, C uses the following fields in a special way: | |
69 | TREE_PUBLIC to record that there was a previous local extern decl. | |
70 | TREE_USED to record that such a decl was used. | |
71 | TREE_ADDRESSABLE to record that the address of such a decl was used. */ | |
72 | ||
73 | /* Nonzero means reject anything that ANSI standard C forbids. */ | |
74 | extern int pedantic; | |
75 | ||
76 | /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ | |
77 | #define C_TYPE_FIELDS_READONLY(type) TREE_LANG_FLAG_1 (type) | |
78 | ||
79 | /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ | |
80 | #define C_TYPE_FIELDS_VOLATILE(type) TREE_LANG_FLAG_2 (type) | |
81 | ||
82 | /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE | |
83 | nonzero if the definition of the type has already started. */ | |
84 | #define C_TYPE_BEING_DEFINED(type) TYPE_LANG_FLAG_0 (type) | |
85 | ||
3932261a MM |
86 | /* C types are partitioned into three subsets: object, function, and |
87 | incomplete types. */ | |
88 | #define C_TYPE_OBJECT_P(type) \ | |
89 | (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type)) | |
90 | ||
91 | #define C_TYPE_FUNCTION_P(type) \ | |
92 | (TREE_CODE (type) == FUNCTION_TYPE) | |
93 | ||
94 | #define C_TYPE_INCOMPLETE_P(type) \ | |
95 | (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0) | |
96 | ||
97 | /* For convenience we define a single macro to identify the class of | |
98 | object or incomplete types. */ | |
99 | #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \ | |
100 | (!C_TYPE_FUNCTION_P (type)) | |
101 | ||
40754343 RS |
102 | /* In a RECORD_TYPE, a sorted array of the fields of the type. */ |
103 | struct lang_type | |
104 | { | |
105 | int len; | |
106 | tree elts[1]; | |
107 | }; | |
108 | ||
109 | /* Mark which labels are explicitly declared. | |
110 | These may be shadowed, and may be referenced from nested functions. */ | |
111 | #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) | |
112 | ||
113 | /* Record whether a type or decl was written with nonconstant size. | |
114 | Note that TYPE_SIZE may have simplified to a constant. */ | |
115 | #define C_TYPE_VARIABLE_SIZE(type) TYPE_LANG_FLAG_1 (type) | |
116 | #define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_0 (type) | |
117 | ||
118 | /* Record in each node resulting from a binary operator | |
119 | what operator was specified for it. */ | |
120 | #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp)) | |
121 | ||
122 | #if 0 /* Not used. */ | |
123 | /* Record whether a decl for a function or function pointer has | |
124 | already been mentioned (in a warning) because it was called | |
125 | but didn't have a prototype. */ | |
126 | #define C_MISSING_PROTOTYPE_WARNED(decl) DECL_LANG_FLAG_2(decl) | |
127 | #endif | |
128 | ||
129 | /* Store a value in that field. */ | |
130 | #define C_SET_EXP_ORIGINAL_CODE(exp, code) \ | |
0f41302f | 131 | (TREE_COMPLEXITY (exp) = (int) (code)) |
40754343 RS |
132 | |
133 | /* Record whether a typedef for type `int' was actually `signed int'. */ | |
134 | #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp)) | |
135 | ||
96735c06 RS |
136 | /* Nonzero for a declaration of a built in function if there has been no |
137 | occasion that would declare the function in ordinary C. | |
138 | Using the function draws a pedantic warning in this case. */ | |
139 | #define C_DECL_ANTICIPATED(exp) DECL_LANG_FLAG_3 ((exp)) | |
140 | ||
40754343 RS |
141 | /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as |
142 | TYPE_ARG_TYPES for functions with prototypes, but created for functions | |
143 | without prototypes. */ | |
144 | #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE) | |
4e28fa00 | 145 | |
e8970a8c RK |
146 | /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ |
147 | #define DECL_C_BIT_FIELD(NODE) DECL_LANG_FLAG_4 (NODE) | |
148 | ||
42981920 RS |
149 | /* In a VAR_DECL, means the variable is really an iterator. */ |
150 | #define ITERATOR_P(D) (DECL_LANG_FLAG_4(D)) | |
151 | ||
152 | /* In a VAR_DECL for an iterator, means we are within | |
153 | an explicit loop over that iterator. */ | |
154 | #define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag) | |
40754343 | 155 | \f |
bfb73556 | 156 | /* in c-lang.c and objc-act.c */ |
6e090c76 KG |
157 | extern tree lookup_interface PARAMS ((tree)); |
158 | extern tree is_class_name PARAMS ((tree)); | |
159 | extern void maybe_objc_check_decl PARAMS ((tree)); | |
160 | extern void finish_file PARAMS ((void)); | |
161 | extern int maybe_objc_comptypes PARAMS ((tree, tree, int)); | |
162 | extern tree maybe_building_objc_message_expr PARAMS ((void)); | |
163 | extern tree maybe_objc_method_name PARAMS ((tree)); | |
164 | extern int recognize_objc_keyword PARAMS ((void)); | |
165 | extern tree build_objc_string PARAMS ((int, const char *)); | |
7c57c798 | 166 | \f |
1526a060 | 167 | /* in c-parse.in */ |
6e090c76 | 168 | extern void c_parse_init PARAMS ((void)); |
1526a060 | 169 | |
7c57c798 | 170 | /* in c-aux-info.c */ |
6e090c76 | 171 | extern void gen_aux_info_record PARAMS ((tree, int, int, int)); |
40754343 | 172 | |
665f2503 RK |
173 | /* In c-common.c */ |
174 | extern unsigned int min_precision PARAMS ((tree, int)); | |
175 | ||
7c57c798 | 176 | /* in c-convert.c */ |
6e090c76 | 177 | extern tree convert PARAMS ((tree, tree)); |
40754343 | 178 | |
7c57c798 | 179 | /* in c-decl.c */ |
6e090c76 | 180 | extern tree build_enumerator PARAMS ((tree, tree)); |
7c57c798 | 181 | /* Add qualifiers to a type, in the fashion for C. */ |
6e090c76 | 182 | extern tree c_build_qualified_type PARAMS ((tree, int)); |
3932261a MM |
183 | #define c_build_type_variant(TYPE, CONST_P, VOLATILE_P) \ |
184 | c_build_qualified_type (TYPE, \ | |
185 | ((CONST_P) ? TYPE_QUAL_CONST : 0) | \ | |
186 | ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0)) | |
6e090c76 KG |
187 | extern int c_decode_option PARAMS ((int, char **)); |
188 | extern void c_mark_varargs PARAMS ((void)); | |
189 | extern tree check_identifier PARAMS ((tree, tree)); | |
190 | extern void clear_parm_order PARAMS ((void)); | |
191 | extern tree combine_parm_decls PARAMS ((tree, tree, int)); | |
192 | extern int complete_array_type PARAMS ((tree, tree, int)); | |
193 | extern void declare_parm_level PARAMS ((int)); | |
3b304f5b ZW |
194 | extern tree define_label PARAMS ((const char *, int, |
195 | tree)); | |
6e090c76 KG |
196 | extern void delete_block PARAMS ((tree)); |
197 | extern void finish_decl PARAMS ((tree, tree, tree)); | |
198 | extern void finish_decl_top_level PARAMS ((tree, tree, tree)); | |
199 | extern tree finish_enum PARAMS ((tree, tree, tree)); | |
200 | extern void finish_function PARAMS ((int)); | |
201 | extern tree finish_struct PARAMS ((tree, tree, tree)); | |
202 | extern tree get_parm_info PARAMS ((int)); | |
203 | extern tree getdecls PARAMS ((void)); | |
204 | extern tree gettags PARAMS ((void)); | |
205 | extern int global_bindings_p PARAMS ((void)); | |
206 | extern tree grokfield PARAMS ((const char *, int, tree, tree, tree)); | |
207 | extern tree groktypename PARAMS ((tree)); | |
208 | extern tree groktypename_in_parm_context PARAMS ((tree)); | |
209 | extern tree implicitly_declare PARAMS ((tree)); | |
210 | extern int in_parm_level_p PARAMS ((void)); | |
211 | extern void init_decl_processing PARAMS ((void)); | |
212 | extern void insert_block PARAMS ((tree)); | |
213 | extern void keep_next_level PARAMS ((void)); | |
214 | extern int kept_level_p PARAMS ((void)); | |
215 | extern tree lookup_label PARAMS ((tree)); | |
216 | extern tree lookup_name PARAMS ((tree)); | |
217 | extern tree lookup_name_current_level PARAMS ((tree)); | |
218 | extern tree lookup_name_current_level_global PARAMS ((tree)); | |
219 | extern tree maybe_build_cleanup PARAMS ((tree)); | |
220 | extern void parmlist_tags_warning PARAMS ((void)); | |
221 | extern void pending_xref_error PARAMS ((void)); | |
222 | extern void mark_c_function_context PARAMS ((struct function *)); | |
223 | extern void push_c_function_context PARAMS ((struct function *)); | |
224 | extern void pop_c_function_context PARAMS ((struct function *)); | |
225 | extern void pop_label_level PARAMS ((void)); | |
226 | extern tree poplevel PARAMS ((int, int, int)); | |
227 | extern void print_lang_decl PARAMS ((FILE *, tree, int)); | |
228 | extern void print_lang_identifier PARAMS ((FILE *, tree, int)); | |
229 | extern void print_lang_type PARAMS ((FILE *, tree, int)); | |
230 | extern void push_label_level PARAMS ((void)); | |
231 | extern void push_parm_decl PARAMS ((tree)); | |
232 | extern tree pushdecl PARAMS ((tree)); | |
233 | extern tree pushdecl_top_level PARAMS ((tree)); | |
234 | extern void pushlevel PARAMS ((int)); | |
235 | extern void pushtag PARAMS ((tree, tree)); | |
236 | extern void set_block PARAMS ((tree)); | |
237 | extern tree shadow_label PARAMS ((tree)); | |
238 | extern void shadow_record_fields PARAMS ((tree)); | |
239 | extern void shadow_tag PARAMS ((tree)); | |
240 | extern void shadow_tag_warned PARAMS ((tree, int)); | |
241 | extern tree start_enum PARAMS ((tree)); | |
242 | extern int start_function PARAMS ((tree, tree, tree, | |
4dd7201e | 243 | tree)); |
6e090c76 KG |
244 | extern tree start_decl PARAMS ((tree, tree, int, |
245 | tree, tree)); | |
246 | extern tree start_struct PARAMS ((enum tree_code, tree)); | |
247 | extern void store_parm_decls PARAMS ((void)); | |
248 | extern tree xref_tag PARAMS ((enum tree_code, tree)); | |
7c57c798 RS |
249 | |
250 | /* in c-typeck.c */ | |
6e090c76 KG |
251 | extern tree require_complete_type PARAMS ((tree)); |
252 | extern void incomplete_type_error PARAMS ((tree, tree)); | |
7c57c798 RS |
253 | /* Given two integer or real types, return the type for their sum. |
254 | Given two compatible ANSI C types, returns the merged type. */ | |
6e090c76 KG |
255 | extern tree common_type PARAMS ((tree, tree)); |
256 | extern int comptypes PARAMS ((tree, tree)); | |
257 | extern tree c_sizeof PARAMS ((tree)); | |
258 | extern tree c_sizeof_nowarn PARAMS ((tree)); | |
259 | extern tree c_size_in_bytes PARAMS ((tree)); | |
260 | extern tree c_alignof PARAMS ((tree)); | |
261 | extern tree c_alignof_expr PARAMS ((tree)); | |
262 | extern tree default_conversion PARAMS ((tree)); | |
263 | extern tree build_component_ref PARAMS ((tree, tree)); | |
264 | extern tree build_indirect_ref PARAMS ((tree, const char *)); | |
265 | extern tree build_array_ref PARAMS ((tree, tree)); | |
266 | extern tree build_function_call PARAMS ((tree, tree)); | |
267 | extern tree parser_build_binary_op PARAMS ((enum tree_code, | |
268 | tree, tree)); | |
269 | extern tree build_binary_op PARAMS ((enum tree_code, | |
270 | tree, tree, int)); | |
271 | extern tree build_unary_op PARAMS ((enum tree_code, | |
272 | tree, int)); | |
273 | extern int lvalue_p PARAMS ((tree)); | |
274 | extern int lvalue_or_else PARAMS ((tree, const char *)); | |
275 | extern void readonly_warning PARAMS ((tree, const char *)); | |
276 | extern int mark_addressable PARAMS ((tree)); | |
277 | extern tree build_conditional_expr PARAMS ((tree, tree, tree)); | |
278 | extern tree build_compound_expr PARAMS ((tree)); | |
279 | extern tree build_c_cast PARAMS ((tree, tree)); | |
280 | extern tree build_modify_expr PARAMS ((tree, enum tree_code, | |
281 | tree)); | |
282 | extern void store_init_value PARAMS ((tree, tree)); | |
283 | extern void error_init PARAMS ((const char *)); | |
284 | extern void pedwarn_init PARAMS ((const char *)); | |
285 | extern void start_init PARAMS ((tree, tree, int)); | |
286 | extern void finish_init PARAMS ((void)); | |
287 | extern void really_start_incremental_init PARAMS ((tree)); | |
288 | extern void push_init_level PARAMS ((int)); | |
289 | extern tree pop_init_level PARAMS ((int)); | |
290 | extern void set_init_index PARAMS ((tree, tree)); | |
291 | extern void set_init_label PARAMS ((tree)); | |
292 | extern void process_init_element PARAMS ((tree)); | |
293 | extern void c_expand_asm_operands PARAMS ((tree, tree, tree, | |
3b304f5b ZW |
294 | tree, int, |
295 | const char *, int)); | |
6e090c76 KG |
296 | extern void c_expand_return PARAMS ((tree)); |
297 | extern tree c_expand_start_case PARAMS ((tree)); | |
40754343 | 298 | |
42981920 | 299 | /* in c-iterate.c */ |
6e090c76 KG |
300 | extern void init_iterators PARAMS ((void)); |
301 | extern void iterator_expand PARAMS ((tree)); | |
302 | extern void iterator_for_loop_start PARAMS ((tree)); | |
303 | extern void iterator_for_loop_end PARAMS ((tree)); | |
304 | extern void iterator_for_loop_record PARAMS ((tree)); | |
305 | extern void push_iterator_stack PARAMS ((void)); | |
306 | extern void pop_iterator_stack PARAMS ((void)); | |
42981920 | 307 | |
40754343 RS |
308 | /* Set to 0 at beginning of a function definition, set to 1 if |
309 | a return statement that specifies a return value is seen. */ | |
310 | ||
311 | extern int current_function_returns_value; | |
312 | ||
313 | /* Set to 0 at beginning of a function definition, set to 1 if | |
314 | a return statement with no argument is seen. */ | |
315 | ||
316 | extern int current_function_returns_null; | |
317 | ||
6bdd692c RK |
318 | /* Nonzero means the expression being parsed will never be evaluated. |
319 | This is a count, since unevaluated expressions can nest. */ | |
320 | ||
321 | extern int skip_evaluation; | |
322 | ||
40754343 RS |
323 | /* Nonzero means `$' can be in an identifier. */ |
324 | ||
325 | extern int dollars_in_ident; | |
326 | ||
327 | /* Nonzero means allow type mismatches in conditional expressions; | |
328 | just make their values `void'. */ | |
329 | ||
330 | extern int flag_cond_mismatch; | |
331 | ||
332 | /* Nonzero means don't recognize the keyword `asm'. */ | |
333 | ||
334 | extern int flag_no_asm; | |
335 | ||
92fce8f5 RK |
336 | /* Nonzero means environment is hosted (i.e., not freestanding) */ |
337 | ||
338 | extern int flag_hosted; | |
339 | ||
40754343 RS |
340 | /* Nonzero means warn about implicit declarations. */ |
341 | ||
342 | extern int warn_implicit; | |
343 | ||
344 | /* Nonzero means give string constants the type `const char *' | |
345 | to get extra warnings from them. These warnings will be too numerous | |
346 | to be useful, except in thoroughly ANSIfied programs. */ | |
347 | ||
d9cf7c82 | 348 | extern int flag_const_strings; |
40754343 RS |
349 | |
350 | /* Nonzero means warn about sizeof (function) or addition/subtraction | |
351 | of function pointers. */ | |
352 | ||
353 | extern int warn_pointer_arith; | |
354 | ||
355 | /* Nonzero means warn for all old-style non-prototype function decls. */ | |
356 | ||
357 | extern int warn_strict_prototypes; | |
358 | ||
359 | /* Nonzero means warn about multiple (redundant) decls for the same single | |
360 | variable or function. */ | |
361 | ||
362 | extern int warn_redundant_decls; | |
363 | ||
364 | /* Nonzero means warn about extern declarations of objects not at | |
365 | file-scope level and about *all* declarations of functions (whether | |
366 | extern or static) not at file-scope level. Note that we exclude | |
367 | implicit function declarations. To get warnings about those, use | |
368 | -Wimplicit. */ | |
369 | ||
370 | extern int warn_nested_externs; | |
371 | ||
372 | /* Nonzero means warn about pointer casts that can drop a type qualifier | |
373 | from the pointer target type. */ | |
374 | ||
375 | extern int warn_cast_qual; | |
376 | ||
95572adf RK |
377 | /* Nonzero means warn when casting a function call to a type that does |
378 | not match the return type (e.g. (float)sqrt() or (anything*)malloc() | |
379 | when there is no previous declaration of sqrt or malloc. */ | |
380 | ||
381 | extern int warn_bad_function_cast; | |
382 | ||
0ca3fb0a KG |
383 | /* Warn about functions which might be candidates for attribute noreturn. */ |
384 | ||
385 | extern int warn_missing_noreturn; | |
386 | ||
40754343 RS |
387 | /* Warn about traditional constructs whose meanings changed in ANSI C. */ |
388 | ||
389 | extern int warn_traditional; | |
390 | ||
391 | /* Warn about *printf or *scanf format/argument anomalies. */ | |
392 | ||
393 | extern int warn_format; | |
394 | ||
395 | /* Warn about a subscript that has type char. */ | |
396 | ||
397 | extern int warn_char_subscripts; | |
398 | ||
399 | /* Warn if a type conversion is done that might have confusing results. */ | |
400 | ||
401 | extern int warn_conversion; | |
402 | ||
92fce8f5 RK |
403 | /* Warn if main is suspicious. */ |
404 | ||
405 | extern int warn_main; | |
406 | ||
40754343 RS |
407 | /* Nonzero means do some things the same way PCC does. */ |
408 | ||
409 | extern int flag_traditional; | |
410 | ||
31948547 | 411 | /* Nonzero means use the ISO C99 dialect of C. */ |
3932261a | 412 | |
31948547 | 413 | extern int flag_isoc99; |
3932261a | 414 | |
b3fe11b8 RS |
415 | /* Nonzero means to allow single precision math even if we're generally |
416 | being traditional. */ | |
417 | extern int flag_allow_single_precision; | |
418 | ||
40754343 RS |
419 | /* Nonzero means warn about suggesting putting in ()'s. */ |
420 | ||
421 | extern int warn_parentheses; | |
422 | ||
83091176 RS |
423 | /* Warn if initializer is not completely bracketed. */ |
424 | ||
425 | extern int warn_missing_braces; | |
426 | ||
d51f9363 JM |
427 | /* Warn about comparison of signed and unsigned values. */ |
428 | ||
ab684785 | 429 | extern int warn_sign_compare; |
d51f9363 | 430 | |
b843d210 DZ |
431 | /* Warn about testing equality of floating point numbers. */ |
432 | ||
433 | extern int warn_float_equal; | |
434 | ||
4a870dba JM |
435 | /* Warn about multicharacter constants. */ |
436 | ||
437 | extern int warn_multichar; | |
438 | ||
704e23f0 RH |
439 | /* Warn about long long. */ |
440 | ||
441 | extern int warn_long_long; | |
442 | ||
40754343 RS |
443 | /* Nonzero means we are reading code that came from a system header file. */ |
444 | ||
445 | extern int system_header_p; | |
7c57c798 | 446 | |
bfb73556 TW |
447 | /* Nonzero enables objc features. */ |
448 | ||
449 | extern int doing_objc_thang; | |
450 | ||
0bb0a00b | 451 | /* In c-decl.c */ |
6e090c76 | 452 | extern void finish_incomplete_decl PARAMS ((tree)); |
0bb0a00b | 453 | |
7c57c798 | 454 | #endif /* not _C_TREE_H */ |