]>
Commit | Line | Data |
---|---|---|
27bf414c JM |
1 | /* Parser for C and Objective-C. |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
b295aee2 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009 |
5df27e4a | 4 | Free Software Foundation, Inc. |
27bf414c JM |
5 | |
6 | Parser actions based on the old Bison parser; structure somewhat | |
7 | influenced by and fragments based on the C++ parser. | |
8 | ||
9 | This file is part of GCC. | |
10 | ||
11 | GCC is free software; you can redistribute it and/or modify it under | |
12 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 13 | Software Foundation; either version 3, or (at your option) any later |
27bf414c JM |
14 | version. |
15 | ||
16 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
27bf414c JM |
24 | |
25 | /* TODO: | |
26 | ||
27 | Make sure all relevant comments, and all relevant code from all | |
28 | actions, brought over from old parser. Verify exact correspondence | |
29 | of syntax accepted. | |
30 | ||
31 | Add testcases covering every input symbol in every state in old and | |
32 | new parsers. | |
33 | ||
34 | Include full syntax for GNU C, including erroneous cases accepted | |
35 | with error messages, in syntax productions in comments. | |
36 | ||
37 | Make more diagnostics in the front end generally take an explicit | |
38 | location rather than implicitly using input_location. */ | |
39 | ||
40 | #include "config.h" | |
41 | #include "system.h" | |
42 | #include "coretypes.h" | |
43 | #include "tm.h" | |
44 | #include "tree.h" | |
bc4071dd | 45 | #include "rtl.h" |
27bf414c JM |
46 | #include "langhooks.h" |
47 | #include "input.h" | |
48 | #include "cpplib.h" | |
49 | #include "timevar.h" | |
50 | #include "c-pragma.h" | |
51 | #include "c-tree.h" | |
52 | #include "flags.h" | |
53 | #include "output.h" | |
54 | #include "toplev.h" | |
55 | #include "ggc.h" | |
56 | #include "c-common.h" | |
bc4071dd RH |
57 | #include "vec.h" |
58 | #include "target.h" | |
474eccc6 | 59 | #include "cgraph.h" |
68a607d8 | 60 | #include "plugin.h" |
f9417da1 | 61 | #include "except.h" |
27bf414c JM |
62 | |
63 | \f | |
27bf414c JM |
64 | /* Initialization routine for this file. */ |
65 | ||
66 | void | |
67 | c_parse_init (void) | |
68 | { | |
69 | /* The only initialization required is of the reserved word | |
70 | identifiers. */ | |
71 | unsigned int i; | |
72 | tree id; | |
eea1139b | 73 | int mask = 0; |
27bf414c | 74 | |
eea1139b ILT |
75 | mask |= D_CXXONLY; |
76 | if (!flag_isoc99) | |
77 | mask |= D_C99; | |
78 | if (flag_no_asm) | |
79 | { | |
80 | mask |= D_ASM | D_EXT; | |
81 | if (!flag_isoc99) | |
82 | mask |= D_EXT89; | |
83 | } | |
27bf414c | 84 | if (!c_dialect_objc ()) |
eea1139b | 85 | mask |= D_OBJC | D_CXX_OBJC; |
27bf414c JM |
86 | |
87 | ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX); | |
eea1139b | 88 | for (i = 0; i < num_c_common_reswords; i++) |
27bf414c JM |
89 | { |
90 | /* If a keyword is disabled, do not enter it into the table | |
91 | and so create a canonical spelling that isn't a keyword. */ | |
eea1139b ILT |
92 | if (c_common_reswords[i].disable & mask) |
93 | { | |
94 | if (warn_cxx_compat | |
95 | && (c_common_reswords[i].disable & D_CXXWARN)) | |
96 | { | |
97 | id = get_identifier (c_common_reswords[i].word); | |
98 | C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN); | |
99 | C_IS_RESERVED_WORD (id) = 1; | |
100 | } | |
101 | continue; | |
102 | } | |
27bf414c | 103 | |
eea1139b ILT |
104 | id = get_identifier (c_common_reswords[i].word); |
105 | C_SET_RID_CODE (id, c_common_reswords[i].rid); | |
27bf414c | 106 | C_IS_RESERVED_WORD (id) = 1; |
eea1139b | 107 | ridpointers [(int) c_common_reswords[i].rid] = id; |
27bf414c JM |
108 | } |
109 | } | |
110 | \f | |
111 | /* The C lexer intermediates between the lexer in cpplib and c-lex.c | |
112 | and the C parser. Unlike the C++ lexer, the parser structure | |
113 | stores the lexer information instead of using a separate structure. | |
114 | Identifiers are separated into ordinary identifiers, type names, | |
115 | keywords and some other Objective-C types of identifiers, and some | |
116 | look-ahead is maintained. | |
117 | ||
118 | ??? It might be a good idea to lex the whole file up front (as for | |
119 | C++). It would then be possible to share more of the C and C++ | |
120 | lexer code, if desired. */ | |
121 | ||
122 | /* The following local token type is used. */ | |
123 | ||
124 | /* A keyword. */ | |
125 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
126 | ||
27bf414c JM |
127 | /* More information about the type of a CPP_NAME token. */ |
128 | typedef enum c_id_kind { | |
129 | /* An ordinary identifier. */ | |
130 | C_ID_ID, | |
131 | /* An identifier declared as a typedef name. */ | |
132 | C_ID_TYPENAME, | |
133 | /* An identifier declared as an Objective-C class name. */ | |
134 | C_ID_CLASSNAME, | |
135 | /* Not an identifier. */ | |
136 | C_ID_NONE | |
137 | } c_id_kind; | |
138 | ||
139 | /* A single C token after string literal concatenation and conversion | |
140 | of preprocessing tokens to tokens. */ | |
d1b38208 | 141 | typedef struct GTY (()) c_token { |
27bf414c JM |
142 | /* The kind of token. */ |
143 | ENUM_BITFIELD (cpp_ttype) type : 8; | |
144 | /* If this token is a CPP_NAME, this value indicates whether also | |
145 | declared as some kind of type. Otherwise, it is C_ID_NONE. */ | |
146 | ENUM_BITFIELD (c_id_kind) id_kind : 8; | |
147 | /* If this token is a keyword, this value indicates which keyword. | |
148 | Otherwise, this value is RID_MAX. */ | |
149 | ENUM_BITFIELD (rid) keyword : 8; | |
bc4071dd RH |
150 | /* If this token is a CPP_PRAGMA, this indicates the pragma that |
151 | was seen. Otherwise it is PRAGMA_NONE. */ | |
13fa1171 | 152 | ENUM_BITFIELD (pragma_kind) pragma_kind : 8; |
27bf414c JM |
153 | /* The value associated with this token, if any. */ |
154 | tree value; | |
155 | /* The location at which this token was found. */ | |
156 | location_t location; | |
157 | } c_token; | |
158 | ||
159 | /* A parser structure recording information about the state and | |
160 | context of parsing. Includes lexer information with up to two | |
161 | tokens of look-ahead; more are not needed for C. */ | |
d1b38208 | 162 | typedef struct GTY(()) c_parser { |
27bf414c JM |
163 | /* The look-ahead tokens. */ |
164 | c_token tokens[2]; | |
165 | /* How many look-ahead tokens are available (0, 1 or 2). */ | |
166 | short tokens_avail; | |
167 | /* True if a syntax error is being recovered from; false otherwise. | |
168 | c_parser_error sets this flag. It should clear this flag when | |
169 | enough tokens have been consumed to recover from the error. */ | |
170 | BOOL_BITFIELD error : 1; | |
bc4071dd RH |
171 | /* True if we're processing a pragma, and shouldn't automatically |
172 | consume CPP_PRAGMA_EOL. */ | |
173 | BOOL_BITFIELD in_pragma : 1; | |
b4b56033 MLI |
174 | /* True if we're parsing the outermost block of an if statement. */ |
175 | BOOL_BITFIELD in_if_block : 1; | |
46c2514e TT |
176 | /* True if we want to lex an untranslated string. */ |
177 | BOOL_BITFIELD lex_untranslated_string : 1; | |
0bacb8c7 TT |
178 | /* Objective-C specific parser/lexer information. */ |
179 | BOOL_BITFIELD objc_pq_context : 1; | |
180 | /* The following flag is needed to contextualize Objective-C lexical | |
181 | analysis. In some cases (e.g., 'int NSObject;'), it is | |
182 | undesirable to bind an identifier to an Objective-C class, even | |
183 | if a class with that name exists. */ | |
184 | BOOL_BITFIELD objc_need_raw_identifier : 1; | |
27bf414c JM |
185 | } c_parser; |
186 | ||
bc4071dd RH |
187 | |
188 | /* The actual parser and external interface. ??? Does this need to be | |
189 | garbage-collected? */ | |
190 | ||
191 | static GTY (()) c_parser *the_parser; | |
192 | ||
193 | ||
27bf414c JM |
194 | /* Read in and lex a single token, storing it in *TOKEN. */ |
195 | ||
196 | static void | |
0bacb8c7 | 197 | c_lex_one_token (c_parser *parser, c_token *token) |
27bf414c JM |
198 | { |
199 | timevar_push (TV_LEX); | |
bc4071dd | 200 | |
46c2514e TT |
201 | token->type = c_lex_with_flags (&token->value, &token->location, NULL, |
202 | (parser->lex_untranslated_string | |
203 | ? C_LEX_STRING_NO_TRANSLATE : 0)); | |
bc4071dd RH |
204 | token->id_kind = C_ID_NONE; |
205 | token->keyword = RID_MAX; | |
206 | token->pragma_kind = PRAGMA_NONE; | |
bc4071dd | 207 | |
27bf414c JM |
208 | switch (token->type) |
209 | { | |
210 | case CPP_NAME: | |
27bf414c JM |
211 | { |
212 | tree decl; | |
213 | ||
0bacb8c7 TT |
214 | bool objc_force_identifier = parser->objc_need_raw_identifier; |
215 | if (c_dialect_objc ()) | |
216 | parser->objc_need_raw_identifier = false; | |
27bf414c JM |
217 | |
218 | if (C_IS_RESERVED_WORD (token->value)) | |
219 | { | |
220 | enum rid rid_code = C_RID_CODE (token->value); | |
221 | ||
eea1139b ILT |
222 | if (rid_code == RID_CXX_COMPAT_WARN) |
223 | { | |
3ba09659 AH |
224 | warning_at (token->location, |
225 | OPT_Wc___compat, | |
88388a52 JM |
226 | "identifier %qE conflicts with C++ keyword", |
227 | token->value); | |
eea1139b ILT |
228 | } |
229 | else if (c_dialect_objc ()) | |
27bf414c | 230 | { |
eea1139b | 231 | if (!objc_is_reserved_word (token->value) |
0bacb8c7 TT |
232 | && (!OBJC_IS_PQ_KEYWORD (rid_code) |
233 | || parser->objc_pq_context)) | |
27bf414c JM |
234 | { |
235 | /* Return the canonical spelling for this keyword. */ | |
236 | token->value = ridpointers[(int) rid_code]; | |
237 | token->type = CPP_KEYWORD; | |
238 | token->keyword = rid_code; | |
239 | break; | |
240 | } | |
241 | } | |
242 | else | |
243 | { | |
27bf414c JM |
244 | token->type = CPP_KEYWORD; |
245 | token->keyword = rid_code; | |
246 | break; | |
247 | } | |
248 | } | |
249 | ||
250 | decl = lookup_name (token->value); | |
251 | if (decl) | |
252 | { | |
253 | if (TREE_CODE (decl) == TYPE_DECL) | |
254 | { | |
255 | token->id_kind = C_ID_TYPENAME; | |
256 | break; | |
257 | } | |
258 | } | |
259 | else if (c_dialect_objc ()) | |
260 | { | |
261 | tree objc_interface_decl = objc_is_class_name (token->value); | |
262 | /* Objective-C class names are in the same namespace as | |
263 | variables and typedefs, and hence are shadowed by local | |
264 | declarations. */ | |
265 | if (objc_interface_decl | |
266 | && (global_bindings_p () | |
267 | || (!objc_force_identifier && !decl))) | |
268 | { | |
269 | token->value = objc_interface_decl; | |
270 | token->id_kind = C_ID_CLASSNAME; | |
271 | break; | |
272 | } | |
273 | } | |
bc4071dd | 274 | token->id_kind = C_ID_ID; |
27bf414c | 275 | } |
27bf414c JM |
276 | break; |
277 | case CPP_AT_NAME: | |
278 | /* This only happens in Objective-C; it must be a keyword. */ | |
279 | token->type = CPP_KEYWORD; | |
27bf414c JM |
280 | token->keyword = C_RID_CODE (token->value); |
281 | break; | |
282 | case CPP_COLON: | |
283 | case CPP_COMMA: | |
284 | case CPP_CLOSE_PAREN: | |
285 | case CPP_SEMICOLON: | |
286 | /* These tokens may affect the interpretation of any identifiers | |
287 | following, if doing Objective-C. */ | |
0bacb8c7 TT |
288 | if (c_dialect_objc ()) |
289 | parser->objc_need_raw_identifier = false; | |
bc4071dd RH |
290 | break; |
291 | case CPP_PRAGMA: | |
292 | /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */ | |
d75d71e0 | 293 | token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value); |
bc4071dd | 294 | token->value = NULL; |
27bf414c JM |
295 | break; |
296 | default: | |
27bf414c JM |
297 | break; |
298 | } | |
299 | timevar_pop (TV_LEX); | |
300 | } | |
301 | ||
302 | /* Return a pointer to the next token from PARSER, reading it in if | |
303 | necessary. */ | |
304 | ||
305 | static inline c_token * | |
306 | c_parser_peek_token (c_parser *parser) | |
307 | { | |
308 | if (parser->tokens_avail == 0) | |
309 | { | |
0bacb8c7 | 310 | c_lex_one_token (parser, &parser->tokens[0]); |
27bf414c JM |
311 | parser->tokens_avail = 1; |
312 | } | |
313 | return &parser->tokens[0]; | |
314 | } | |
315 | ||
316 | /* Return true if the next token from PARSER has the indicated | |
317 | TYPE. */ | |
318 | ||
319 | static inline bool | |
320 | c_parser_next_token_is (c_parser *parser, enum cpp_ttype type) | |
321 | { | |
322 | return c_parser_peek_token (parser)->type == type; | |
323 | } | |
324 | ||
325 | /* Return true if the next token from PARSER does not have the | |
326 | indicated TYPE. */ | |
327 | ||
328 | static inline bool | |
329 | c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type) | |
330 | { | |
331 | return !c_parser_next_token_is (parser, type); | |
332 | } | |
333 | ||
334 | /* Return true if the next token from PARSER is the indicated | |
335 | KEYWORD. */ | |
336 | ||
337 | static inline bool | |
338 | c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword) | |
339 | { | |
dbc518f0 | 340 | return c_parser_peek_token (parser)->keyword == keyword; |
27bf414c JM |
341 | } |
342 | ||
343 | /* Return true if TOKEN can start a type name, | |
344 | false otherwise. */ | |
345 | static bool | |
346 | c_token_starts_typename (c_token *token) | |
347 | { | |
348 | switch (token->type) | |
349 | { | |
350 | case CPP_NAME: | |
351 | switch (token->id_kind) | |
352 | { | |
353 | case C_ID_ID: | |
354 | return false; | |
355 | case C_ID_TYPENAME: | |
356 | return true; | |
357 | case C_ID_CLASSNAME: | |
358 | gcc_assert (c_dialect_objc ()); | |
359 | return true; | |
360 | default: | |
361 | gcc_unreachable (); | |
362 | } | |
363 | case CPP_KEYWORD: | |
364 | switch (token->keyword) | |
365 | { | |
366 | case RID_UNSIGNED: | |
367 | case RID_LONG: | |
368 | case RID_SHORT: | |
369 | case RID_SIGNED: | |
370 | case RID_COMPLEX: | |
371 | case RID_INT: | |
372 | case RID_CHAR: | |
373 | case RID_FLOAT: | |
374 | case RID_DOUBLE: | |
375 | case RID_VOID: | |
9a8ce21f JG |
376 | case RID_DFLOAT32: |
377 | case RID_DFLOAT64: | |
378 | case RID_DFLOAT128: | |
27bf414c JM |
379 | case RID_BOOL: |
380 | case RID_ENUM: | |
381 | case RID_STRUCT: | |
382 | case RID_UNION: | |
383 | case RID_TYPEOF: | |
384 | case RID_CONST: | |
385 | case RID_VOLATILE: | |
386 | case RID_RESTRICT: | |
387 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
388 | case RID_FRACT: |
389 | case RID_ACCUM: | |
390 | case RID_SAT: | |
27bf414c JM |
391 | return true; |
392 | default: | |
393 | return false; | |
394 | } | |
395 | case CPP_LESS: | |
396 | if (c_dialect_objc ()) | |
397 | return true; | |
398 | return false; | |
399 | default: | |
400 | return false; | |
401 | } | |
402 | } | |
403 | ||
404 | /* Return true if the next token from PARSER can start a type name, | |
405 | false otherwise. */ | |
406 | static inline bool | |
407 | c_parser_next_token_starts_typename (c_parser *parser) | |
408 | { | |
409 | c_token *token = c_parser_peek_token (parser); | |
410 | return c_token_starts_typename (token); | |
411 | } | |
412 | ||
413 | /* Return true if TOKEN can start declaration specifiers, false | |
414 | otherwise. */ | |
415 | static bool | |
416 | c_token_starts_declspecs (c_token *token) | |
417 | { | |
418 | switch (token->type) | |
419 | { | |
420 | case CPP_NAME: | |
421 | switch (token->id_kind) | |
422 | { | |
423 | case C_ID_ID: | |
424 | return false; | |
425 | case C_ID_TYPENAME: | |
426 | return true; | |
427 | case C_ID_CLASSNAME: | |
428 | gcc_assert (c_dialect_objc ()); | |
429 | return true; | |
430 | default: | |
431 | gcc_unreachable (); | |
432 | } | |
433 | case CPP_KEYWORD: | |
434 | switch (token->keyword) | |
435 | { | |
436 | case RID_STATIC: | |
437 | case RID_EXTERN: | |
438 | case RID_REGISTER: | |
439 | case RID_TYPEDEF: | |
440 | case RID_INLINE: | |
441 | case RID_AUTO: | |
442 | case RID_THREAD: | |
443 | case RID_UNSIGNED: | |
444 | case RID_LONG: | |
445 | case RID_SHORT: | |
446 | case RID_SIGNED: | |
447 | case RID_COMPLEX: | |
448 | case RID_INT: | |
449 | case RID_CHAR: | |
450 | case RID_FLOAT: | |
451 | case RID_DOUBLE: | |
452 | case RID_VOID: | |
9a8ce21f JG |
453 | case RID_DFLOAT32: |
454 | case RID_DFLOAT64: | |
455 | case RID_DFLOAT128: | |
27bf414c JM |
456 | case RID_BOOL: |
457 | case RID_ENUM: | |
458 | case RID_STRUCT: | |
459 | case RID_UNION: | |
460 | case RID_TYPEOF: | |
461 | case RID_CONST: | |
462 | case RID_VOLATILE: | |
463 | case RID_RESTRICT: | |
464 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
465 | case RID_FRACT: |
466 | case RID_ACCUM: | |
467 | case RID_SAT: | |
27bf414c JM |
468 | return true; |
469 | default: | |
470 | return false; | |
471 | } | |
472 | case CPP_LESS: | |
473 | if (c_dialect_objc ()) | |
474 | return true; | |
475 | return false; | |
476 | default: | |
477 | return false; | |
478 | } | |
479 | } | |
480 | ||
481 | /* Return true if the next token from PARSER can start declaration | |
482 | specifiers, false otherwise. */ | |
483 | static inline bool | |
484 | c_parser_next_token_starts_declspecs (c_parser *parser) | |
485 | { | |
486 | c_token *token = c_parser_peek_token (parser); | |
487 | return c_token_starts_declspecs (token); | |
488 | } | |
489 | ||
490 | /* Return a pointer to the next-but-one token from PARSER, reading it | |
491 | in if necessary. The next token is already read in. */ | |
492 | ||
493 | static c_token * | |
494 | c_parser_peek_2nd_token (c_parser *parser) | |
495 | { | |
496 | if (parser->tokens_avail >= 2) | |
497 | return &parser->tokens[1]; | |
498 | gcc_assert (parser->tokens_avail == 1); | |
499 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
bc4071dd | 500 | gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL); |
0bacb8c7 | 501 | c_lex_one_token (parser, &parser->tokens[1]); |
27bf414c JM |
502 | parser->tokens_avail = 2; |
503 | return &parser->tokens[1]; | |
504 | } | |
505 | ||
506 | /* Consume the next token from PARSER. */ | |
507 | ||
508 | static void | |
509 | c_parser_consume_token (c_parser *parser) | |
510 | { | |
bc4071dd RH |
511 | gcc_assert (parser->tokens_avail >= 1); |
512 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
513 | gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL); | |
514 | gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA); | |
27bf414c JM |
515 | if (parser->tokens_avail == 2) |
516 | parser->tokens[0] = parser->tokens[1]; | |
27bf414c JM |
517 | parser->tokens_avail--; |
518 | } | |
519 | ||
bc4071dd RH |
520 | /* Expect the current token to be a #pragma. Consume it and remember |
521 | that we've begun parsing a pragma. */ | |
522 | ||
523 | static void | |
524 | c_parser_consume_pragma (c_parser *parser) | |
525 | { | |
526 | gcc_assert (!parser->in_pragma); | |
527 | gcc_assert (parser->tokens_avail >= 1); | |
528 | gcc_assert (parser->tokens[0].type == CPP_PRAGMA); | |
529 | if (parser->tokens_avail == 2) | |
530 | parser->tokens[0] = parser->tokens[1]; | |
531 | parser->tokens_avail--; | |
532 | parser->in_pragma = true; | |
533 | } | |
534 | ||
27bf414c JM |
535 | /* Update the globals input_location and in_system_header from |
536 | TOKEN. */ | |
537 | static inline void | |
538 | c_parser_set_source_position_from_token (c_token *token) | |
539 | { | |
540 | if (token->type != CPP_EOF) | |
541 | { | |
542 | input_location = token->location; | |
27bf414c JM |
543 | } |
544 | } | |
545 | ||
27bf414c JM |
546 | /* Issue a diagnostic of the form |
547 | FILE:LINE: MESSAGE before TOKEN | |
548 | where TOKEN is the next token in the input stream of PARSER. | |
549 | MESSAGE (specified by the caller) is usually of the form "expected | |
550 | OTHER-TOKEN". | |
551 | ||
552 | Do not issue a diagnostic if still recovering from an error. | |
553 | ||
554 | ??? This is taken from the C++ parser, but building up messages in | |
555 | this way is not i18n-friendly and some other approach should be | |
556 | used. */ | |
557 | ||
558 | static void | |
4b794eaf | 559 | c_parser_error (c_parser *parser, const char *gmsgid) |
27bf414c JM |
560 | { |
561 | c_token *token = c_parser_peek_token (parser); | |
562 | if (parser->error) | |
563 | return; | |
564 | parser->error = true; | |
4b794eaf | 565 | if (!gmsgid) |
27bf414c JM |
566 | return; |
567 | /* This diagnostic makes more sense if it is tagged to the line of | |
568 | the token we just peeked at. */ | |
569 | c_parser_set_source_position_from_token (token); | |
4b794eaf | 570 | c_parse_error (gmsgid, |
27bf414c JM |
571 | /* Because c_parse_error does not understand |
572 | CPP_KEYWORD, keywords are treated like | |
573 | identifiers. */ | |
574 | (token->type == CPP_KEYWORD ? CPP_NAME : token->type), | |
cfc93532 MLI |
575 | /* ??? The C parser does not save the cpp flags of a |
576 | token, we need to pass 0 here and we will not get | |
577 | the source spelling of some tokens but rather the | |
578 | canonical spelling. */ | |
579 | token->value, /*flags=*/0); | |
27bf414c JM |
580 | } |
581 | ||
582 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
583 | issue the error MSGID. If MSGID is NULL then a message has already | |
584 | been produced and no message will be produced this time. Returns | |
585 | true if found, false otherwise. */ | |
586 | ||
587 | static bool | |
588 | c_parser_require (c_parser *parser, | |
589 | enum cpp_ttype type, | |
590 | const char *msgid) | |
591 | { | |
592 | if (c_parser_next_token_is (parser, type)) | |
593 | { | |
594 | c_parser_consume_token (parser); | |
595 | return true; | |
596 | } | |
597 | else | |
598 | { | |
599 | c_parser_error (parser, msgid); | |
600 | return false; | |
601 | } | |
602 | } | |
603 | ||
604 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
605 | issue the error MSGID. Returns true if found, false otherwise. */ | |
606 | ||
607 | static bool | |
608 | c_parser_require_keyword (c_parser *parser, | |
609 | enum rid keyword, | |
610 | const char *msgid) | |
611 | { | |
612 | if (c_parser_next_token_is_keyword (parser, keyword)) | |
613 | { | |
614 | c_parser_consume_token (parser); | |
615 | return true; | |
616 | } | |
617 | else | |
618 | { | |
619 | c_parser_error (parser, msgid); | |
620 | return false; | |
621 | } | |
622 | } | |
623 | ||
624 | /* Like c_parser_require, except that tokens will be skipped until the | |
625 | desired token is found. An error message is still produced if the | |
626 | next token is not as expected. If MSGID is NULL then a message has | |
627 | already been produced and no message will be produced this | |
628 | time. */ | |
629 | ||
630 | static void | |
631 | c_parser_skip_until_found (c_parser *parser, | |
632 | enum cpp_ttype type, | |
633 | const char *msgid) | |
634 | { | |
635 | unsigned nesting_depth = 0; | |
636 | ||
637 | if (c_parser_require (parser, type, msgid)) | |
638 | return; | |
639 | ||
640 | /* Skip tokens until the desired token is found. */ | |
641 | while (true) | |
642 | { | |
643 | /* Peek at the next token. */ | |
644 | c_token *token = c_parser_peek_token (parser); | |
645 | /* If we've reached the token we want, consume it and stop. */ | |
646 | if (token->type == type && !nesting_depth) | |
647 | { | |
648 | c_parser_consume_token (parser); | |
649 | break; | |
650 | } | |
bc4071dd | 651 | |
27bf414c JM |
652 | /* If we've run out of tokens, stop. */ |
653 | if (token->type == CPP_EOF) | |
654 | return; | |
bc4071dd RH |
655 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
656 | return; | |
27bf414c JM |
657 | if (token->type == CPP_OPEN_BRACE |
658 | || token->type == CPP_OPEN_PAREN | |
659 | || token->type == CPP_OPEN_SQUARE) | |
660 | ++nesting_depth; | |
661 | else if (token->type == CPP_CLOSE_BRACE | |
662 | || token->type == CPP_CLOSE_PAREN | |
663 | || token->type == CPP_CLOSE_SQUARE) | |
664 | { | |
665 | if (nesting_depth-- == 0) | |
666 | break; | |
667 | } | |
668 | /* Consume this token. */ | |
669 | c_parser_consume_token (parser); | |
670 | } | |
671 | parser->error = false; | |
672 | } | |
673 | ||
674 | /* Skip tokens until the end of a parameter is found, but do not | |
675 | consume the comma, semicolon or closing delimiter. */ | |
676 | ||
677 | static void | |
678 | c_parser_skip_to_end_of_parameter (c_parser *parser) | |
679 | { | |
680 | unsigned nesting_depth = 0; | |
681 | ||
682 | while (true) | |
683 | { | |
684 | c_token *token = c_parser_peek_token (parser); | |
685 | if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON) | |
686 | && !nesting_depth) | |
687 | break; | |
688 | /* If we've run out of tokens, stop. */ | |
689 | if (token->type == CPP_EOF) | |
690 | return; | |
bc4071dd RH |
691 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
692 | return; | |
27bf414c JM |
693 | if (token->type == CPP_OPEN_BRACE |
694 | || token->type == CPP_OPEN_PAREN | |
695 | || token->type == CPP_OPEN_SQUARE) | |
696 | ++nesting_depth; | |
697 | else if (token->type == CPP_CLOSE_BRACE | |
698 | || token->type == CPP_CLOSE_PAREN | |
699 | || token->type == CPP_CLOSE_SQUARE) | |
700 | { | |
701 | if (nesting_depth-- == 0) | |
702 | break; | |
703 | } | |
704 | /* Consume this token. */ | |
705 | c_parser_consume_token (parser); | |
706 | } | |
707 | parser->error = false; | |
708 | } | |
709 | ||
bc4071dd RH |
710 | /* Expect to be at the end of the pragma directive and consume an |
711 | end of line marker. */ | |
712 | ||
713 | static void | |
714 | c_parser_skip_to_pragma_eol (c_parser *parser) | |
715 | { | |
716 | gcc_assert (parser->in_pragma); | |
717 | parser->in_pragma = false; | |
718 | ||
719 | if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line")) | |
720 | while (true) | |
721 | { | |
722 | c_token *token = c_parser_peek_token (parser); | |
723 | if (token->type == CPP_EOF) | |
724 | break; | |
725 | if (token->type == CPP_PRAGMA_EOL) | |
726 | { | |
727 | c_parser_consume_token (parser); | |
728 | break; | |
729 | } | |
730 | c_parser_consume_token (parser); | |
731 | } | |
732 | ||
733 | parser->error = false; | |
734 | } | |
27bf414c | 735 | |
2a83cc52 RH |
736 | /* Skip tokens until we have consumed an entire block, or until we |
737 | have consumed a non-nested ';'. */ | |
738 | ||
739 | static void | |
740 | c_parser_skip_to_end_of_block_or_statement (c_parser *parser) | |
741 | { | |
742 | unsigned nesting_depth = 0; | |
743 | bool save_error = parser->error; | |
744 | ||
745 | while (true) | |
746 | { | |
747 | c_token *token; | |
748 | ||
749 | /* Peek at the next token. */ | |
750 | token = c_parser_peek_token (parser); | |
751 | ||
752 | switch (token->type) | |
753 | { | |
754 | case CPP_EOF: | |
755 | return; | |
756 | ||
757 | case CPP_PRAGMA_EOL: | |
758 | if (parser->in_pragma) | |
759 | return; | |
760 | break; | |
761 | ||
762 | case CPP_SEMICOLON: | |
763 | /* If the next token is a ';', we have reached the | |
764 | end of the statement. */ | |
765 | if (!nesting_depth) | |
766 | { | |
767 | /* Consume the ';'. */ | |
768 | c_parser_consume_token (parser); | |
769 | goto finished; | |
770 | } | |
771 | break; | |
772 | ||
773 | case CPP_CLOSE_BRACE: | |
774 | /* If the next token is a non-nested '}', then we have | |
775 | reached the end of the current block. */ | |
776 | if (nesting_depth == 0 || --nesting_depth == 0) | |
777 | { | |
778 | c_parser_consume_token (parser); | |
779 | goto finished; | |
780 | } | |
781 | break; | |
782 | ||
783 | case CPP_OPEN_BRACE: | |
784 | /* If it the next token is a '{', then we are entering a new | |
785 | block. Consume the entire block. */ | |
786 | ++nesting_depth; | |
787 | break; | |
788 | ||
789 | case CPP_PRAGMA: | |
790 | /* If we see a pragma, consume the whole thing at once. We | |
791 | have some safeguards against consuming pragmas willy-nilly. | |
792 | Normally, we'd expect to be here with parser->error set, | |
793 | which disables these safeguards. But it's possible to get | |
794 | here for secondary error recovery, after parser->error has | |
795 | been cleared. */ | |
796 | c_parser_consume_pragma (parser); | |
797 | c_parser_skip_to_pragma_eol (parser); | |
798 | parser->error = save_error; | |
799 | continue; | |
9e33de05 RS |
800 | |
801 | default: | |
802 | break; | |
2a83cc52 RH |
803 | } |
804 | ||
805 | c_parser_consume_token (parser); | |
806 | } | |
807 | ||
808 | finished: | |
809 | parser->error = false; | |
810 | } | |
811 | ||
d2e796ad MLI |
812 | /* CPP's options (initialized by c-opts.c). */ |
813 | extern cpp_options *cpp_opts; | |
814 | ||
27bf414c JM |
815 | /* Save the warning flags which are controlled by __extension__. */ |
816 | ||
817 | static inline int | |
818 | disable_extension_diagnostics (void) | |
819 | { | |
820 | int ret = (pedantic | |
821 | | (warn_pointer_arith << 1) | |
822 | | (warn_traditional << 2) | |
d2e796ad | 823 | | (flag_iso << 3) |
24b97832 ILT |
824 | | (warn_long_long << 4) |
825 | | (warn_cxx_compat << 5)); | |
d2e796ad | 826 | cpp_opts->pedantic = pedantic = 0; |
27bf414c | 827 | warn_pointer_arith = 0; |
d2e796ad | 828 | cpp_opts->warn_traditional = warn_traditional = 0; |
27bf414c | 829 | flag_iso = 0; |
9c650d90 | 830 | cpp_opts->warn_long_long = warn_long_long = 0; |
24b97832 | 831 | warn_cxx_compat = 0; |
27bf414c JM |
832 | return ret; |
833 | } | |
834 | ||
835 | /* Restore the warning flags which are controlled by __extension__. | |
836 | FLAGS is the return value from disable_extension_diagnostics. */ | |
837 | ||
838 | static inline void | |
839 | restore_extension_diagnostics (int flags) | |
840 | { | |
d2e796ad | 841 | cpp_opts->pedantic = pedantic = flags & 1; |
27bf414c | 842 | warn_pointer_arith = (flags >> 1) & 1; |
d2e796ad | 843 | cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1; |
27bf414c | 844 | flag_iso = (flags >> 3) & 1; |
9c650d90 | 845 | cpp_opts->warn_long_long = warn_long_long = (flags >> 4) & 1; |
24b97832 | 846 | warn_cxx_compat = (flags >> 5) & 1; |
27bf414c JM |
847 | } |
848 | ||
849 | /* Possibly kinds of declarator to parse. */ | |
850 | typedef enum c_dtr_syn { | |
851 | /* A normal declarator with an identifier. */ | |
852 | C_DTR_NORMAL, | |
853 | /* An abstract declarator (maybe empty). */ | |
854 | C_DTR_ABSTRACT, | |
855 | /* A parameter declarator: may be either, but after a type name does | |
856 | not redeclare a typedef name as an identifier if it can | |
857 | alternatively be interpreted as a typedef name; see DR#009, | |
858 | applied in C90 TC1, omitted from C99 and reapplied in C99 TC2 | |
859 | following DR#249. For example, given a typedef T, "int T" and | |
860 | "int *T" are valid parameter declarations redeclaring T, while | |
861 | "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are | |
862 | abstract declarators rather than involving redundant parentheses; | |
863 | the same applies with attributes inside the parentheses before | |
864 | "T". */ | |
865 | C_DTR_PARM | |
866 | } c_dtr_syn; | |
867 | ||
868 | static void c_parser_external_declaration (c_parser *); | |
869 | static void c_parser_asm_definition (c_parser *); | |
870 | static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, bool); | |
871 | static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool, | |
872 | bool); | |
873 | static struct c_typespec c_parser_enum_specifier (c_parser *); | |
874 | static struct c_typespec c_parser_struct_or_union_specifier (c_parser *); | |
875 | static tree c_parser_struct_declaration (c_parser *); | |
876 | static struct c_typespec c_parser_typeof_specifier (c_parser *); | |
877 | static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn, | |
878 | bool *); | |
879 | static struct c_declarator *c_parser_direct_declarator (c_parser *, bool, | |
880 | c_dtr_syn, bool *); | |
881 | static struct c_declarator *c_parser_direct_declarator_inner (c_parser *, | |
882 | bool, | |
883 | struct c_declarator *); | |
884 | static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree); | |
885 | static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree); | |
886 | static struct c_parm *c_parser_parameter_declaration (c_parser *, tree); | |
887 | static tree c_parser_simple_asm_expr (c_parser *); | |
888 | static tree c_parser_attributes (c_parser *); | |
889 | static struct c_type_name *c_parser_type_name (c_parser *); | |
890 | static struct c_expr c_parser_initializer (c_parser *); | |
891 | static struct c_expr c_parser_braced_init (c_parser *, tree, bool); | |
892 | static void c_parser_initelt (c_parser *); | |
893 | static void c_parser_initval (c_parser *, struct c_expr *); | |
894 | static tree c_parser_compound_statement (c_parser *); | |
895 | static void c_parser_compound_statement_nostart (c_parser *); | |
896 | static void c_parser_label (c_parser *); | |
897 | static void c_parser_statement (c_parser *); | |
898 | static void c_parser_statement_after_labels (c_parser *); | |
899 | static void c_parser_if_statement (c_parser *); | |
900 | static void c_parser_switch_statement (c_parser *); | |
901 | static void c_parser_while_statement (c_parser *); | |
902 | static void c_parser_do_statement (c_parser *); | |
903 | static void c_parser_for_statement (c_parser *); | |
904 | static tree c_parser_asm_statement (c_parser *); | |
46bdb9cf | 905 | static tree c_parser_asm_operands (c_parser *, bool); |
1c384bf1 | 906 | static tree c_parser_asm_goto_operands (c_parser *); |
27bf414c JM |
907 | static tree c_parser_asm_clobbers (c_parser *); |
908 | static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *); | |
909 | static struct c_expr c_parser_conditional_expression (c_parser *, | |
910 | struct c_expr *); | |
911 | static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *); | |
912 | static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *); | |
913 | static struct c_expr c_parser_unary_expression (c_parser *); | |
914 | static struct c_expr c_parser_sizeof_expression (c_parser *); | |
915 | static struct c_expr c_parser_alignof_expression (c_parser *); | |
916 | static struct c_expr c_parser_postfix_expression (c_parser *); | |
917 | static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *, | |
24b97832 ILT |
918 | struct c_type_name *, |
919 | location_t); | |
27bf414c | 920 | static struct c_expr c_parser_postfix_expression_after_primary (c_parser *, |
c2255bc4 | 921 | location_t loc, |
27bf414c JM |
922 | struct c_expr); |
923 | static struct c_expr c_parser_expression (c_parser *); | |
46bdb9cf | 924 | static struct c_expr c_parser_expression_conv (c_parser *); |
bbbbb16a ILT |
925 | static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool, |
926 | VEC(tree,gc) **); | |
953ff289 DN |
927 | static void c_parser_omp_construct (c_parser *); |
928 | static void c_parser_omp_threadprivate (c_parser *); | |
929 | static void c_parser_omp_barrier (c_parser *); | |
930 | static void c_parser_omp_flush (c_parser *); | |
a68ab351 | 931 | static void c_parser_omp_taskwait (c_parser *); |
27bf414c | 932 | |
bc4071dd RH |
933 | enum pragma_context { pragma_external, pragma_stmt, pragma_compound }; |
934 | static bool c_parser_pragma (c_parser *, enum pragma_context); | |
935 | ||
27bf414c JM |
936 | /* These Objective-C parser functions are only ever called when |
937 | compiling Objective-C. */ | |
938 | static void c_parser_objc_class_definition (c_parser *); | |
939 | static void c_parser_objc_class_instance_variables (c_parser *); | |
940 | static void c_parser_objc_class_declaration (c_parser *); | |
941 | static void c_parser_objc_alias_declaration (c_parser *); | |
942 | static void c_parser_objc_protocol_definition (c_parser *); | |
943 | static enum tree_code c_parser_objc_method_type (c_parser *); | |
944 | static void c_parser_objc_method_definition (c_parser *); | |
945 | static void c_parser_objc_methodprotolist (c_parser *); | |
946 | static void c_parser_objc_methodproto (c_parser *); | |
947 | static tree c_parser_objc_method_decl (c_parser *); | |
948 | static tree c_parser_objc_type_name (c_parser *); | |
949 | static tree c_parser_objc_protocol_refs (c_parser *); | |
950 | static void c_parser_objc_try_catch_statement (c_parser *); | |
951 | static void c_parser_objc_synchronized_statement (c_parser *); | |
952 | static tree c_parser_objc_selector (c_parser *); | |
953 | static tree c_parser_objc_selector_arg (c_parser *); | |
954 | static tree c_parser_objc_receiver (c_parser *); | |
955 | static tree c_parser_objc_message_args (c_parser *); | |
956 | static tree c_parser_objc_keywordexpr (c_parser *); | |
957 | ||
958 | /* Parse a translation unit (C90 6.7, C99 6.9). | |
959 | ||
960 | translation-unit: | |
961 | external-declarations | |
962 | ||
963 | external-declarations: | |
964 | external-declaration | |
965 | external-declarations external-declaration | |
966 | ||
967 | GNU extensions: | |
968 | ||
969 | translation-unit: | |
970 | empty | |
971 | */ | |
972 | ||
973 | static void | |
974 | c_parser_translation_unit (c_parser *parser) | |
975 | { | |
976 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
977 | { | |
509c9d60 MLI |
978 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
979 | "ISO C forbids an empty translation unit"); | |
27bf414c JM |
980 | } |
981 | else | |
982 | { | |
983 | void *obstack_position = obstack_alloc (&parser_obstack, 0); | |
6ec637a4 | 984 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
985 | do |
986 | { | |
987 | ggc_collect (); | |
988 | c_parser_external_declaration (parser); | |
989 | obstack_free (&parser_obstack, obstack_position); | |
990 | } | |
991 | while (c_parser_next_token_is_not (parser, CPP_EOF)); | |
992 | } | |
993 | } | |
994 | ||
995 | /* Parse an external declaration (C90 6.7, C99 6.9). | |
996 | ||
997 | external-declaration: | |
998 | function-definition | |
999 | declaration | |
1000 | ||
1001 | GNU extensions: | |
1002 | ||
1003 | external-declaration: | |
1004 | asm-definition | |
1005 | ; | |
1006 | __extension__ external-declaration | |
1007 | ||
1008 | Objective-C: | |
1009 | ||
1010 | external-declaration: | |
1011 | objc-class-definition | |
1012 | objc-class-declaration | |
1013 | objc-alias-declaration | |
1014 | objc-protocol-definition | |
1015 | objc-method-definition | |
1016 | @end | |
1017 | */ | |
1018 | ||
1019 | static void | |
1020 | c_parser_external_declaration (c_parser *parser) | |
1021 | { | |
1022 | int ext; | |
1023 | switch (c_parser_peek_token (parser)->type) | |
1024 | { | |
1025 | case CPP_KEYWORD: | |
1026 | switch (c_parser_peek_token (parser)->keyword) | |
1027 | { | |
1028 | case RID_EXTENSION: | |
1029 | ext = disable_extension_diagnostics (); | |
1030 | c_parser_consume_token (parser); | |
1031 | c_parser_external_declaration (parser); | |
1032 | restore_extension_diagnostics (ext); | |
1033 | break; | |
1034 | case RID_ASM: | |
1035 | c_parser_asm_definition (parser); | |
1036 | break; | |
1037 | case RID_AT_INTERFACE: | |
1038 | case RID_AT_IMPLEMENTATION: | |
1039 | gcc_assert (c_dialect_objc ()); | |
1040 | c_parser_objc_class_definition (parser); | |
1041 | break; | |
eea1139b | 1042 | case RID_CLASS: |
27bf414c JM |
1043 | gcc_assert (c_dialect_objc ()); |
1044 | c_parser_objc_class_declaration (parser); | |
1045 | break; | |
1046 | case RID_AT_ALIAS: | |
1047 | gcc_assert (c_dialect_objc ()); | |
1048 | c_parser_objc_alias_declaration (parser); | |
1049 | break; | |
1050 | case RID_AT_PROTOCOL: | |
1051 | gcc_assert (c_dialect_objc ()); | |
1052 | c_parser_objc_protocol_definition (parser); | |
1053 | break; | |
1054 | case RID_AT_END: | |
1055 | gcc_assert (c_dialect_objc ()); | |
1056 | c_parser_consume_token (parser); | |
1057 | objc_finish_implementation (); | |
1058 | break; | |
1059 | default: | |
1060 | goto decl_or_fndef; | |
1061 | } | |
1062 | break; | |
1063 | case CPP_SEMICOLON: | |
509c9d60 MLI |
1064 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
1065 | "ISO C does not allow extra %<;%> outside of a function"); | |
27bf414c JM |
1066 | c_parser_consume_token (parser); |
1067 | break; | |
bc4071dd | 1068 | case CPP_PRAGMA: |
6ec637a4 | 1069 | mark_valid_location_for_stdc_pragma (true); |
bc4071dd | 1070 | c_parser_pragma (parser, pragma_external); |
6ec637a4 | 1071 | mark_valid_location_for_stdc_pragma (false); |
bc4071dd | 1072 | break; |
27bf414c JM |
1073 | case CPP_PLUS: |
1074 | case CPP_MINUS: | |
1075 | if (c_dialect_objc ()) | |
1076 | { | |
1077 | c_parser_objc_method_definition (parser); | |
1078 | break; | |
1079 | } | |
1080 | /* Else fall through, and yield a syntax error trying to parse | |
1081 | as a declaration or function definition. */ | |
1082 | default: | |
1083 | decl_or_fndef: | |
1084 | /* A declaration or a function definition. We can only tell | |
1085 | which after parsing the declaration specifiers, if any, and | |
1086 | the first declarator. */ | |
1087 | c_parser_declaration_or_fndef (parser, true, true, false, true); | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | ||
bc4071dd | 1092 | |
27bf414c JM |
1093 | /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99 |
1094 | 6.7, 6.9.1). If FNDEF_OK is true, a function definition is | |
1095 | accepted; otherwise (old-style parameter declarations) only other | |
1096 | declarations are accepted. If NESTED is true, we are inside a | |
1097 | function or parsing old-style parameter declarations; any functions | |
1098 | encountered are nested functions and declaration specifiers are | |
1099 | required; otherwise we are at top level and functions are normal | |
1100 | functions and declaration specifiers may be optional. If EMPTY_OK | |
1101 | is true, empty declarations are OK (subject to all other | |
1102 | constraints); otherwise (old-style parameter declarations) they are | |
1103 | diagnosed. If START_ATTR_OK is true, the declaration specifiers | |
1104 | may start with attributes; otherwise they may not. | |
1105 | ||
1106 | declaration: | |
1107 | declaration-specifiers init-declarator-list[opt] ; | |
1108 | ||
1109 | function-definition: | |
1110 | declaration-specifiers[opt] declarator declaration-list[opt] | |
1111 | compound-statement | |
1112 | ||
1113 | declaration-list: | |
1114 | declaration | |
1115 | declaration-list declaration | |
1116 | ||
1117 | init-declarator-list: | |
1118 | init-declarator | |
1119 | init-declarator-list , init-declarator | |
1120 | ||
1121 | init-declarator: | |
1122 | declarator simple-asm-expr[opt] attributes[opt] | |
1123 | declarator simple-asm-expr[opt] attributes[opt] = initializer | |
1124 | ||
1125 | GNU extensions: | |
1126 | ||
1127 | nested-function-definition: | |
1128 | declaration-specifiers declarator declaration-list[opt] | |
1129 | compound-statement | |
1130 | ||
1131 | The simple-asm-expr and attributes are GNU extensions. | |
1132 | ||
1133 | This function does not handle __extension__; that is handled in its | |
1134 | callers. ??? Following the old parser, __extension__ may start | |
1135 | external declarations, declarations in functions and declarations | |
1136 | at the start of "for" loops, but not old-style parameter | |
1137 | declarations. | |
1138 | ||
1139 | C99 requires declaration specifiers in a function definition; the | |
1140 | absence is diagnosed through the diagnosis of implicit int. In GNU | |
1141 | C we also allow but diagnose declarations without declaration | |
1142 | specifiers, but only at top level (elsewhere they conflict with | |
953ff289 DN |
1143 | other syntax). |
1144 | ||
1145 | OpenMP: | |
1146 | ||
1147 | declaration: | |
1148 | threadprivate-directive */ | |
27bf414c JM |
1149 | |
1150 | static void | |
1151 | c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, bool empty_ok, | |
1152 | bool nested, bool start_attr_ok) | |
1153 | { | |
1154 | struct c_declspecs *specs; | |
1155 | tree prefix_attrs; | |
1156 | tree all_prefix_attrs; | |
1157 | bool diagnosed_no_specs = false; | |
c7412148 | 1158 | location_t here = c_parser_peek_token (parser)->location; |
bc4071dd | 1159 | |
27bf414c JM |
1160 | specs = build_null_declspecs (); |
1161 | c_parser_declspecs (parser, specs, true, true, start_attr_ok); | |
1162 | if (parser->error) | |
1163 | { | |
1164 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1165 | return; | |
1166 | } | |
1167 | if (nested && !specs->declspecs_seen_p) | |
1168 | { | |
1169 | c_parser_error (parser, "expected declaration specifiers"); | |
1170 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1171 | return; | |
1172 | } | |
1173 | finish_declspecs (specs); | |
1174 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1175 | { | |
1176 | if (empty_ok) | |
1177 | shadow_tag (specs); | |
1178 | else | |
1179 | { | |
1180 | shadow_tag_warned (specs, 1); | |
509c9d60 | 1181 | pedwarn (here, 0, "empty declaration"); |
27bf414c JM |
1182 | } |
1183 | c_parser_consume_token (parser); | |
1184 | return; | |
1185 | } | |
1186 | pending_xref_error (); | |
1187 | prefix_attrs = specs->attrs; | |
1188 | all_prefix_attrs = prefix_attrs; | |
1189 | specs->attrs = NULL_TREE; | |
1190 | while (true) | |
1191 | { | |
1192 | struct c_declarator *declarator; | |
1193 | bool dummy = false; | |
1194 | tree fnbody; | |
1195 | /* Declaring either one or more declarators (in which case we | |
1196 | should diagnose if there were no declaration specifiers) or a | |
1197 | function definition (in which case the diagnostic for | |
1198 | implicit int suffices). */ | |
1199 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
1200 | C_DTR_NORMAL, &dummy); | |
1201 | if (declarator == NULL) | |
1202 | { | |
1203 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1204 | return; | |
1205 | } | |
1206 | if (c_parser_next_token_is (parser, CPP_EQ) | |
1207 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1208 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1209 | || c_parser_next_token_is_keyword (parser, RID_ASM) | |
1210 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1211 | { | |
1212 | tree asm_name = NULL_TREE; | |
1213 | tree postfix_attrs = NULL_TREE; | |
1214 | if (!diagnosed_no_specs && !specs->declspecs_seen_p) | |
1215 | { | |
1216 | diagnosed_no_specs = true; | |
509c9d60 | 1217 | pedwarn (here, 0, "data definition has no type or storage class"); |
27bf414c JM |
1218 | } |
1219 | /* Having seen a data definition, there cannot now be a | |
1220 | function definition. */ | |
1221 | fndef_ok = false; | |
1222 | if (c_parser_next_token_is_keyword (parser, RID_ASM)) | |
1223 | asm_name = c_parser_simple_asm_expr (parser); | |
1224 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1225 | postfix_attrs = c_parser_attributes (parser); | |
1226 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1227 | { | |
1228 | tree d; | |
1229 | struct c_expr init; | |
c2255bc4 | 1230 | location_t init_loc; |
27bf414c JM |
1231 | c_parser_consume_token (parser); |
1232 | /* The declaration of the variable is in effect while | |
1233 | its initializer is parsed. */ | |
1234 | d = start_decl (declarator, specs, true, | |
1235 | chainon (postfix_attrs, all_prefix_attrs)); | |
1236 | if (!d) | |
1237 | d = error_mark_node; | |
1238 | start_init (d, asm_name, global_bindings_p ()); | |
c2255bc4 | 1239 | init_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1240 | init = c_parser_initializer (parser); |
1241 | finish_init (); | |
1242 | if (d != error_mark_node) | |
1243 | { | |
1244 | maybe_warn_string_init (TREE_TYPE (d), init); | |
c2255bc4 AH |
1245 | finish_decl (d, init_loc, init.value, |
1246 | init.original_type, asm_name); | |
27bf414c JM |
1247 | } |
1248 | } | |
1249 | else | |
1250 | { | |
1251 | tree d = start_decl (declarator, specs, false, | |
1252 | chainon (postfix_attrs, | |
1253 | all_prefix_attrs)); | |
1254 | if (d) | |
c2255bc4 AH |
1255 | finish_decl (d, UNKNOWN_LOCATION, NULL_TREE, |
1256 | NULL_TREE, asm_name); | |
27bf414c JM |
1257 | } |
1258 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1259 | { | |
1260 | c_parser_consume_token (parser); | |
1261 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1262 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
1263 | prefix_attrs); | |
1264 | else | |
1265 | all_prefix_attrs = prefix_attrs; | |
1266 | continue; | |
1267 | } | |
1268 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1269 | { | |
1270 | c_parser_consume_token (parser); | |
1271 | return; | |
1272 | } | |
1273 | else | |
1274 | { | |
1275 | c_parser_error (parser, "expected %<,%> or %<;%>"); | |
1276 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1277 | return; | |
1278 | } | |
1279 | } | |
1280 | else if (!fndef_ok) | |
1281 | { | |
1282 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, " | |
1283 | "%<asm%> or %<__attribute__%>"); | |
1284 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1285 | return; | |
1286 | } | |
1287 | /* Function definition (nested or otherwise). */ | |
1288 | if (nested) | |
1289 | { | |
509c9d60 | 1290 | pedwarn (here, OPT_pedantic, "ISO C forbids nested functions"); |
d2784db4 | 1291 | c_push_function_context (); |
27bf414c JM |
1292 | } |
1293 | if (!start_function (specs, declarator, all_prefix_attrs)) | |
1294 | { | |
1295 | /* This can appear in many cases looking nothing like a | |
1296 | function definition, so we don't give a more specific | |
1297 | error suggesting there was one. */ | |
1298 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> " | |
1299 | "or %<__attribute__%>"); | |
1300 | if (nested) | |
d2784db4 | 1301 | c_pop_function_context (); |
27bf414c JM |
1302 | break; |
1303 | } | |
1304 | /* Parse old-style parameter declarations. ??? Attributes are | |
1305 | not allowed to start declaration specifiers here because of a | |
1306 | syntax conflict between a function declaration with attribute | |
1307 | suffix and a function definition with an attribute prefix on | |
1308 | first old-style parameter declaration. Following the old | |
1309 | parser, they are not accepted on subsequent old-style | |
1310 | parameter declarations either. However, there is no | |
1311 | ambiguity after the first declaration, nor indeed on the | |
1312 | first as long as we don't allow postfix attributes after a | |
1313 | declarator with a nonempty identifier list in a definition; | |
1314 | and postfix attributes have never been accepted here in | |
1315 | function definitions either. */ | |
1316 | while (c_parser_next_token_is_not (parser, CPP_EOF) | |
1317 | && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE)) | |
1318 | c_parser_declaration_or_fndef (parser, false, false, true, false); | |
27bf414c | 1319 | store_parm_decls (); |
1751ecd6 AH |
1320 | DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus |
1321 | = c_parser_peek_token (parser)->location; | |
27bf414c JM |
1322 | fnbody = c_parser_compound_statement (parser); |
1323 | if (nested) | |
1324 | { | |
1325 | tree decl = current_function_decl; | |
1326 | add_stmt (fnbody); | |
1327 | finish_function (); | |
d2784db4 | 1328 | c_pop_function_context (); |
c2255bc4 | 1329 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
27bf414c JM |
1330 | } |
1331 | else | |
1332 | { | |
1333 | add_stmt (fnbody); | |
1334 | finish_function (); | |
1335 | } | |
1336 | break; | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | /* Parse an asm-definition (asm() outside a function body). This is a | |
1341 | GNU extension. | |
1342 | ||
1343 | asm-definition: | |
1344 | simple-asm-expr ; | |
1345 | */ | |
1346 | ||
1347 | static void | |
1348 | c_parser_asm_definition (c_parser *parser) | |
1349 | { | |
1350 | tree asm_str = c_parser_simple_asm_expr (parser); | |
27bf414c | 1351 | if (asm_str) |
474eccc6 | 1352 | cgraph_add_asm_node (asm_str); |
27bf414c JM |
1353 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1354 | } | |
1355 | ||
1356 | /* Parse some declaration specifiers (possibly none) (C90 6.5, C99 | |
1357 | 6.7), adding them to SPECS (which may already include some). | |
1358 | Storage class specifiers are accepted iff SCSPEC_OK; type | |
1359 | specifiers are accepted iff TYPESPEC_OK; attributes are accepted at | |
1360 | the start iff START_ATTR_OK. | |
1361 | ||
1362 | declaration-specifiers: | |
1363 | storage-class-specifier declaration-specifiers[opt] | |
1364 | type-specifier declaration-specifiers[opt] | |
1365 | type-qualifier declaration-specifiers[opt] | |
1366 | function-specifier declaration-specifiers[opt] | |
1367 | ||
1368 | Function specifiers (inline) are from C99, and are currently | |
1369 | handled as storage class specifiers, as is __thread. | |
1370 | ||
1371 | C90 6.5.1, C99 6.7.1: | |
1372 | storage-class-specifier: | |
1373 | typedef | |
1374 | extern | |
1375 | static | |
1376 | auto | |
1377 | register | |
1378 | ||
1379 | C99 6.7.4: | |
1380 | function-specifier: | |
1381 | inline | |
1382 | ||
1383 | C90 6.5.2, C99 6.7.2: | |
1384 | type-specifier: | |
1385 | void | |
1386 | char | |
1387 | short | |
1388 | int | |
1389 | long | |
1390 | float | |
1391 | double | |
1392 | signed | |
1393 | unsigned | |
1394 | _Bool | |
1395 | _Complex | |
1396 | [_Imaginary removed in C99 TC2] | |
1397 | struct-or-union-specifier | |
1398 | enum-specifier | |
1399 | typedef-name | |
1400 | ||
1401 | (_Bool and _Complex are new in C99.) | |
1402 | ||
1403 | C90 6.5.3, C99 6.7.3: | |
1404 | ||
1405 | type-qualifier: | |
1406 | const | |
1407 | restrict | |
1408 | volatile | |
1409 | ||
1410 | (restrict is new in C99.) | |
1411 | ||
1412 | GNU extensions: | |
1413 | ||
1414 | declaration-specifiers: | |
1415 | attributes declaration-specifiers[opt] | |
1416 | ||
1417 | storage-class-specifier: | |
1418 | __thread | |
1419 | ||
1420 | type-specifier: | |
1421 | typeof-specifier | |
9a8ce21f JG |
1422 | _Decimal32 |
1423 | _Decimal64 | |
1424 | _Decimal128 | |
ab22c1fa CF |
1425 | _Fract |
1426 | _Accum | |
1427 | _Sat | |
1428 | ||
1429 | (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037: | |
1430 | http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) | |
27bf414c JM |
1431 | |
1432 | Objective-C: | |
1433 | ||
1434 | type-specifier: | |
1435 | class-name objc-protocol-refs[opt] | |
1436 | typedef-name objc-protocol-refs | |
1437 | objc-protocol-refs | |
1438 | */ | |
1439 | ||
1440 | static void | |
1441 | c_parser_declspecs (c_parser *parser, struct c_declspecs *specs, | |
1442 | bool scspec_ok, bool typespec_ok, bool start_attr_ok) | |
1443 | { | |
1444 | bool attrs_ok = start_attr_ok; | |
1445 | bool seen_type = specs->type_seen_p; | |
1446 | while (c_parser_next_token_is (parser, CPP_NAME) | |
1447 | || c_parser_next_token_is (parser, CPP_KEYWORD) | |
1448 | || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS))) | |
1449 | { | |
1450 | struct c_typespec t; | |
1451 | tree attrs; | |
dc491a25 | 1452 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1453 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1454 | { | |
1455 | tree value = c_parser_peek_token (parser)->value; | |
1456 | c_id_kind kind = c_parser_peek_token (parser)->id_kind; | |
1457 | /* This finishes the specifiers unless a type name is OK, it | |
1458 | is declared as a type name and a type name hasn't yet | |
1459 | been seen. */ | |
1460 | if (!typespec_ok || seen_type | |
1461 | || (kind != C_ID_TYPENAME && kind != C_ID_CLASSNAME)) | |
1462 | break; | |
1463 | c_parser_consume_token (parser); | |
1464 | seen_type = true; | |
1465 | attrs_ok = true; | |
1466 | if (kind == C_ID_TYPENAME | |
1467 | && (!c_dialect_objc () | |
1468 | || c_parser_next_token_is_not (parser, CPP_LESS))) | |
1469 | { | |
1470 | t.kind = ctsk_typedef; | |
1471 | /* For a typedef name, record the meaning, not the name. | |
1472 | In case of 'foo foo, bar;'. */ | |
1473 | t.spec = lookup_name (value); | |
928c19bb JM |
1474 | t.expr = NULL_TREE; |
1475 | t.expr_const_operands = true; | |
27bf414c JM |
1476 | } |
1477 | else | |
1478 | { | |
1479 | tree proto = NULL_TREE; | |
1480 | gcc_assert (c_dialect_objc ()); | |
1481 | t.kind = ctsk_objc; | |
1482 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1483 | proto = c_parser_objc_protocol_refs (parser); | |
1484 | t.spec = objc_get_protocol_qualified_type (value, proto); | |
928c19bb JM |
1485 | t.expr = NULL_TREE; |
1486 | t.expr_const_operands = true; | |
27bf414c | 1487 | } |
dc491a25 | 1488 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1489 | continue; |
1490 | } | |
1491 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1492 | { | |
1493 | /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" - | |
1494 | nisse@lysator.liu.se. */ | |
1495 | tree proto; | |
1496 | gcc_assert (c_dialect_objc ()); | |
1497 | if (!typespec_ok || seen_type) | |
1498 | break; | |
1499 | proto = c_parser_objc_protocol_refs (parser); | |
1500 | t.kind = ctsk_objc; | |
1501 | t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto); | |
928c19bb JM |
1502 | t.expr = NULL_TREE; |
1503 | t.expr_const_operands = true; | |
dc491a25 | 1504 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1505 | continue; |
1506 | } | |
1507 | gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD)); | |
1508 | switch (c_parser_peek_token (parser)->keyword) | |
1509 | { | |
1510 | case RID_STATIC: | |
1511 | case RID_EXTERN: | |
1512 | case RID_REGISTER: | |
1513 | case RID_TYPEDEF: | |
1514 | case RID_INLINE: | |
1515 | case RID_AUTO: | |
1516 | case RID_THREAD: | |
1517 | if (!scspec_ok) | |
1518 | goto out; | |
1519 | attrs_ok = true; | |
1520 | /* TODO: Distinguish between function specifiers (inline) | |
1521 | and storage class specifiers, either here or in | |
1522 | declspecs_add_scspec. */ | |
1523 | declspecs_add_scspec (specs, c_parser_peek_token (parser)->value); | |
1524 | c_parser_consume_token (parser); | |
1525 | break; | |
1526 | case RID_UNSIGNED: | |
1527 | case RID_LONG: | |
1528 | case RID_SHORT: | |
1529 | case RID_SIGNED: | |
1530 | case RID_COMPLEX: | |
1531 | case RID_INT: | |
1532 | case RID_CHAR: | |
1533 | case RID_FLOAT: | |
1534 | case RID_DOUBLE: | |
1535 | case RID_VOID: | |
9a8ce21f JG |
1536 | case RID_DFLOAT32: |
1537 | case RID_DFLOAT64: | |
1538 | case RID_DFLOAT128: | |
27bf414c | 1539 | case RID_BOOL: |
ab22c1fa CF |
1540 | case RID_FRACT: |
1541 | case RID_ACCUM: | |
1542 | case RID_SAT: | |
27bf414c JM |
1543 | if (!typespec_ok) |
1544 | goto out; | |
1545 | attrs_ok = true; | |
1546 | seen_type = true; | |
0bacb8c7 TT |
1547 | if (c_dialect_objc ()) |
1548 | parser->objc_need_raw_identifier = true; | |
27bf414c JM |
1549 | t.kind = ctsk_resword; |
1550 | t.spec = c_parser_peek_token (parser)->value; | |
928c19bb JM |
1551 | t.expr = NULL_TREE; |
1552 | t.expr_const_operands = true; | |
dc491a25 | 1553 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1554 | c_parser_consume_token (parser); |
1555 | break; | |
1556 | case RID_ENUM: | |
1557 | if (!typespec_ok) | |
1558 | goto out; | |
1559 | attrs_ok = true; | |
1560 | seen_type = true; | |
1561 | t = c_parser_enum_specifier (parser); | |
dc491a25 | 1562 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1563 | break; |
1564 | case RID_STRUCT: | |
1565 | case RID_UNION: | |
1566 | if (!typespec_ok) | |
1567 | goto out; | |
1568 | attrs_ok = true; | |
1569 | seen_type = true; | |
1570 | t = c_parser_struct_or_union_specifier (parser); | |
dab71827 | 1571 | invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, t.spec); |
dc491a25 | 1572 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1573 | break; |
1574 | case RID_TYPEOF: | |
1575 | /* ??? The old parser rejected typeof after other type | |
1576 | specifiers, but is a syntax error the best way of | |
1577 | handling this? */ | |
1578 | if (!typespec_ok || seen_type) | |
1579 | goto out; | |
1580 | attrs_ok = true; | |
1581 | seen_type = true; | |
1582 | t = c_parser_typeof_specifier (parser); | |
dc491a25 | 1583 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
1584 | break; |
1585 | case RID_CONST: | |
1586 | case RID_VOLATILE: | |
1587 | case RID_RESTRICT: | |
1588 | attrs_ok = true; | |
1589 | declspecs_add_qual (specs, c_parser_peek_token (parser)->value); | |
1590 | c_parser_consume_token (parser); | |
1591 | break; | |
1592 | case RID_ATTRIBUTE: | |
1593 | if (!attrs_ok) | |
1594 | goto out; | |
1595 | attrs = c_parser_attributes (parser); | |
1596 | declspecs_add_attrs (specs, attrs); | |
1597 | break; | |
1598 | default: | |
1599 | goto out; | |
1600 | } | |
1601 | } | |
1602 | out: ; | |
1603 | } | |
1604 | ||
1605 | /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2). | |
1606 | ||
1607 | enum-specifier: | |
1608 | enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt] | |
1609 | enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt] | |
1610 | enum attributes[opt] identifier | |
1611 | ||
1612 | The form with trailing comma is new in C99. The forms with | |
1613 | attributes are GNU extensions. In GNU C, we accept any expression | |
1614 | without commas in the syntax (assignment expressions, not just | |
1615 | conditional expressions); assignment expressions will be diagnosed | |
1616 | as non-constant. | |
1617 | ||
1618 | enumerator-list: | |
1619 | enumerator | |
1620 | enumerator-list , enumerator | |
1621 | ||
1622 | enumerator: | |
1623 | enumeration-constant | |
1624 | enumeration-constant = constant-expression | |
1625 | */ | |
1626 | ||
1627 | static struct c_typespec | |
1628 | c_parser_enum_specifier (c_parser *parser) | |
1629 | { | |
1630 | struct c_typespec ret; | |
1631 | tree attrs; | |
1632 | tree ident = NULL_TREE; | |
24b97832 | 1633 | location_t enum_loc; |
922f2908 | 1634 | location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c | 1635 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM)); |
24b97832 | 1636 | enum_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1637 | c_parser_consume_token (parser); |
1638 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 1639 | enum_loc = c_parser_peek_token (parser)->location; |
5af28c74 TT |
1640 | /* Set the location in case we create a decl now. */ |
1641 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
27bf414c JM |
1642 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1643 | { | |
1644 | ident = c_parser_peek_token (parser)->value; | |
c7412148 | 1645 | ident_loc = c_parser_peek_token (parser)->location; |
24b97832 | 1646 | enum_loc = ident_loc; |
27bf414c JM |
1647 | c_parser_consume_token (parser); |
1648 | } | |
1649 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1650 | { | |
1651 | /* Parse an enum definition. */ | |
7114359f | 1652 | struct c_enum_contents the_enum; |
c2255bc4 | 1653 | tree type = start_enum (enum_loc, &the_enum, ident); |
27bf414c JM |
1654 | tree postfix_attrs; |
1655 | /* We chain the enumerators in reverse order, then put them in | |
1656 | forward order at the end. */ | |
1657 | tree values = NULL_TREE; | |
1658 | c_parser_consume_token (parser); | |
1659 | while (true) | |
1660 | { | |
1661 | tree enum_id; | |
1662 | tree enum_value; | |
1663 | tree enum_decl; | |
1664 | bool seen_comma; | |
5af28c74 | 1665 | c_token *token; |
922f2908 | 1666 | location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
85790e66 | 1667 | location_t value_loc; |
27bf414c JM |
1668 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
1669 | { | |
1670 | c_parser_error (parser, "expected identifier"); | |
1671 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1672 | values = error_mark_node; | |
1673 | break; | |
1674 | } | |
5af28c74 TT |
1675 | token = c_parser_peek_token (parser); |
1676 | enum_id = token->value; | |
1677 | /* Set the location in case we create a decl now. */ | |
1678 | c_parser_set_source_position_from_token (token); | |
85790e66 | 1679 | value_loc = token->location; |
27bf414c JM |
1680 | c_parser_consume_token (parser); |
1681 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1682 | { | |
1683 | c_parser_consume_token (parser); | |
85790e66 | 1684 | value_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1685 | enum_value = c_parser_expr_no_commas (parser, NULL).value; |
1686 | } | |
1687 | else | |
1688 | enum_value = NULL_TREE; | |
c2255bc4 AH |
1689 | enum_decl = build_enumerator (value_loc, |
1690 | &the_enum, enum_id, enum_value); | |
27bf414c JM |
1691 | TREE_CHAIN (enum_decl) = values; |
1692 | values = enum_decl; | |
1693 | seen_comma = false; | |
1694 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1695 | { | |
c7412148 | 1696 | comma_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1697 | seen_comma = true; |
1698 | c_parser_consume_token (parser); | |
1699 | } | |
1700 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1701 | { | |
fcf73884 | 1702 | if (seen_comma && !flag_isoc99) |
509c9d60 | 1703 | pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list"); |
27bf414c JM |
1704 | c_parser_consume_token (parser); |
1705 | break; | |
1706 | } | |
1707 | if (!seen_comma) | |
1708 | { | |
1709 | c_parser_error (parser, "expected %<,%> or %<}%>"); | |
1710 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1711 | values = error_mark_node; | |
1712 | break; | |
1713 | } | |
1714 | } | |
1715 | postfix_attrs = c_parser_attributes (parser); | |
1716 | ret.spec = finish_enum (type, nreverse (values), | |
1717 | chainon (attrs, postfix_attrs)); | |
1718 | ret.kind = ctsk_tagdef; | |
928c19bb JM |
1719 | ret.expr = NULL_TREE; |
1720 | ret.expr_const_operands = true; | |
27bf414c JM |
1721 | return ret; |
1722 | } | |
1723 | else if (!ident) | |
1724 | { | |
1725 | c_parser_error (parser, "expected %<{%>"); | |
1726 | ret.spec = error_mark_node; | |
1727 | ret.kind = ctsk_tagref; | |
928c19bb JM |
1728 | ret.expr = NULL_TREE; |
1729 | ret.expr_const_operands = true; | |
27bf414c JM |
1730 | return ret; |
1731 | } | |
c2255bc4 | 1732 | ret = parser_xref_tag (ident_loc, ENUMERAL_TYPE, ident); |
27bf414c JM |
1733 | /* In ISO C, enumerated types can be referred to only if already |
1734 | defined. */ | |
1735 | if (pedantic && !COMPLETE_TYPE_P (ret.spec)) | |
c7412148 TT |
1736 | { |
1737 | gcc_assert (ident); | |
c2255bc4 | 1738 | pedwarn (enum_loc, OPT_pedantic, |
509c9d60 | 1739 | "ISO C forbids forward references to %<enum%> types"); |
c7412148 | 1740 | } |
27bf414c JM |
1741 | return ret; |
1742 | } | |
1743 | ||
1744 | /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1). | |
1745 | ||
1746 | struct-or-union-specifier: | |
1747 | struct-or-union attributes[opt] identifier[opt] | |
1748 | { struct-contents } attributes[opt] | |
1749 | struct-or-union attributes[opt] identifier | |
1750 | ||
1751 | struct-contents: | |
1752 | struct-declaration-list | |
1753 | ||
1754 | struct-declaration-list: | |
1755 | struct-declaration ; | |
1756 | struct-declaration-list struct-declaration ; | |
1757 | ||
1758 | GNU extensions: | |
1759 | ||
1760 | struct-contents: | |
1761 | empty | |
1762 | struct-declaration | |
1763 | struct-declaration-list struct-declaration | |
1764 | ||
1765 | struct-declaration-list: | |
1766 | struct-declaration-list ; | |
1767 | ; | |
1768 | ||
1769 | (Note that in the syntax here, unlike that in ISO C, the semicolons | |
1770 | are included here rather than in struct-declaration, in order to | |
1771 | describe the syntax with extra semicolons and missing semicolon at | |
1772 | end.) | |
1773 | ||
1774 | Objective-C: | |
1775 | ||
1776 | struct-declaration-list: | |
1777 | @defs ( class-name ) | |
1778 | ||
1779 | (Note this does not include a trailing semicolon, but can be | |
1780 | followed by further declarations, and gets a pedwarn-if-pedantic | |
1781 | when followed by a semicolon.) */ | |
1782 | ||
1783 | static struct c_typespec | |
1784 | c_parser_struct_or_union_specifier (c_parser *parser) | |
1785 | { | |
1786 | struct c_typespec ret; | |
1787 | tree attrs; | |
1788 | tree ident = NULL_TREE; | |
24b97832 ILT |
1789 | location_t struct_loc; |
1790 | location_t ident_loc = UNKNOWN_LOCATION; | |
27bf414c JM |
1791 | enum tree_code code; |
1792 | switch (c_parser_peek_token (parser)->keyword) | |
1793 | { | |
1794 | case RID_STRUCT: | |
1795 | code = RECORD_TYPE; | |
1796 | break; | |
1797 | case RID_UNION: | |
1798 | code = UNION_TYPE; | |
1799 | break; | |
1800 | default: | |
1801 | gcc_unreachable (); | |
1802 | } | |
24b97832 | 1803 | struct_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1804 | c_parser_consume_token (parser); |
1805 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 1806 | |
5af28c74 TT |
1807 | /* Set the location in case we create a decl now. */ |
1808 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
c2255bc4 | 1809 | |
27bf414c JM |
1810 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1811 | { | |
1812 | ident = c_parser_peek_token (parser)->value; | |
24b97832 ILT |
1813 | ident_loc = c_parser_peek_token (parser)->location; |
1814 | struct_loc = ident_loc; | |
27bf414c JM |
1815 | c_parser_consume_token (parser); |
1816 | } | |
1817 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1818 | { | |
1819 | /* Parse a struct or union definition. Start the scope of the | |
1820 | tag before parsing components. */ | |
dc491a25 ILT |
1821 | struct c_struct_parse_info *struct_info; |
1822 | tree type = start_struct (struct_loc, code, ident, &struct_info); | |
27bf414c JM |
1823 | tree postfix_attrs; |
1824 | /* We chain the components in reverse order, then put them in | |
1825 | forward order at the end. Each struct-declaration may | |
1826 | declare multiple components (comma-separated), so we must use | |
1827 | chainon to join them, although when parsing each | |
1828 | struct-declaration we can use TREE_CHAIN directly. | |
1829 | ||
1830 | The theory behind all this is that there will be more | |
1831 | semicolon separated fields than comma separated fields, and | |
1832 | so we'll be minimizing the number of node traversals required | |
1833 | by chainon. */ | |
1834 | tree contents = NULL_TREE; | |
1835 | c_parser_consume_token (parser); | |
1836 | /* Handle the Objective-C @defs construct, | |
1837 | e.g. foo(sizeof(struct{ @defs(ClassName) }));. */ | |
1838 | if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS)) | |
1839 | { | |
1840 | tree name; | |
1841 | gcc_assert (c_dialect_objc ()); | |
1842 | c_parser_consume_token (parser); | |
1843 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
1844 | goto end_at_defs; | |
1845 | if (c_parser_next_token_is (parser, CPP_NAME) | |
1846 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME) | |
1847 | { | |
1848 | name = c_parser_peek_token (parser)->value; | |
1849 | c_parser_consume_token (parser); | |
1850 | } | |
1851 | else | |
1852 | { | |
1853 | c_parser_error (parser, "expected class name"); | |
1854 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
1855 | goto end_at_defs; | |
1856 | } | |
1857 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
1858 | "expected %<)%>"); | |
1859 | contents = nreverse (objc_get_class_ivars (name)); | |
1860 | } | |
1861 | end_at_defs: | |
1862 | /* Parse the struct-declarations and semicolons. Problems with | |
1863 | semicolons are diagnosed here; empty structures are diagnosed | |
1864 | elsewhere. */ | |
1865 | while (true) | |
1866 | { | |
1867 | tree decls; | |
1868 | /* Parse any stray semicolon. */ | |
1869 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1870 | { | |
509c9d60 MLI |
1871 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
1872 | "extra semicolon in struct or union specified"); | |
27bf414c JM |
1873 | c_parser_consume_token (parser); |
1874 | continue; | |
1875 | } | |
1876 | /* Stop if at the end of the struct or union contents. */ | |
1877 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1878 | { | |
1879 | c_parser_consume_token (parser); | |
1880 | break; | |
1881 | } | |
bc4071dd RH |
1882 | /* Accept #pragmas at struct scope. */ |
1883 | if (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
1884 | { | |
1885 | c_parser_pragma (parser, pragma_external); | |
1886 | continue; | |
1887 | } | |
27bf414c JM |
1888 | /* Parse some comma-separated declarations, but not the |
1889 | trailing semicolon if any. */ | |
1890 | decls = c_parser_struct_declaration (parser); | |
1891 | contents = chainon (decls, contents); | |
1892 | /* If no semicolon follows, either we have a parse error or | |
1893 | are at the end of the struct or union and should | |
1894 | pedwarn. */ | |
1895 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1896 | c_parser_consume_token (parser); | |
1897 | else | |
1898 | { | |
1899 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
509c9d60 MLI |
1900 | pedwarn (c_parser_peek_token (parser)->location, 0, |
1901 | "no semicolon at end of struct or union"); | |
27bf414c JM |
1902 | else |
1903 | { | |
1904 | c_parser_error (parser, "expected %<;%>"); | |
1905 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1906 | break; | |
1907 | } | |
1908 | } | |
1909 | } | |
1910 | postfix_attrs = c_parser_attributes (parser); | |
c2255bc4 | 1911 | ret.spec = finish_struct (struct_loc, type, nreverse (contents), |
dc491a25 | 1912 | chainon (attrs, postfix_attrs), struct_info); |
27bf414c | 1913 | ret.kind = ctsk_tagdef; |
928c19bb JM |
1914 | ret.expr = NULL_TREE; |
1915 | ret.expr_const_operands = true; | |
27bf414c JM |
1916 | return ret; |
1917 | } | |
1918 | else if (!ident) | |
1919 | { | |
1920 | c_parser_error (parser, "expected %<{%>"); | |
1921 | ret.spec = error_mark_node; | |
1922 | ret.kind = ctsk_tagref; | |
928c19bb JM |
1923 | ret.expr = NULL_TREE; |
1924 | ret.expr_const_operands = true; | |
67c2939d | 1925 | return ret; |
27bf414c | 1926 | } |
c2255bc4 | 1927 | ret = parser_xref_tag (ident_loc, code, ident); |
27bf414c JM |
1928 | return ret; |
1929 | } | |
1930 | ||
1931 | /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without* | |
1932 | the trailing semicolon. | |
1933 | ||
1934 | struct-declaration: | |
1935 | specifier-qualifier-list struct-declarator-list | |
1936 | ||
1937 | specifier-qualifier-list: | |
1938 | type-specifier specifier-qualifier-list[opt] | |
1939 | type-qualifier specifier-qualifier-list[opt] | |
1940 | attributes specifier-qualifier-list[opt] | |
1941 | ||
1942 | struct-declarator-list: | |
1943 | struct-declarator | |
1944 | struct-declarator-list , attributes[opt] struct-declarator | |
1945 | ||
1946 | struct-declarator: | |
1947 | declarator attributes[opt] | |
1948 | declarator[opt] : constant-expression attributes[opt] | |
1949 | ||
1950 | GNU extensions: | |
1951 | ||
1952 | struct-declaration: | |
1953 | __extension__ struct-declaration | |
1954 | specifier-qualifier-list | |
1955 | ||
1956 | Unlike the ISO C syntax, semicolons are handled elsewhere. The use | |
1957 | of attributes where shown is a GNU extension. In GNU C, we accept | |
1958 | any expression without commas in the syntax (assignment | |
1959 | expressions, not just conditional expressions); assignment | |
1960 | expressions will be diagnosed as non-constant. */ | |
1961 | ||
1962 | static tree | |
1963 | c_parser_struct_declaration (c_parser *parser) | |
1964 | { | |
1965 | struct c_declspecs *specs; | |
1966 | tree prefix_attrs; | |
1967 | tree all_prefix_attrs; | |
1968 | tree decls; | |
c7412148 | 1969 | location_t decl_loc; |
27bf414c JM |
1970 | if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) |
1971 | { | |
1972 | int ext; | |
1973 | tree decl; | |
1974 | ext = disable_extension_diagnostics (); | |
1975 | c_parser_consume_token (parser); | |
1976 | decl = c_parser_struct_declaration (parser); | |
1977 | restore_extension_diagnostics (ext); | |
1978 | return decl; | |
1979 | } | |
1980 | specs = build_null_declspecs (); | |
c7412148 | 1981 | decl_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1982 | c_parser_declspecs (parser, specs, false, true, true); |
1983 | if (parser->error) | |
67c2939d | 1984 | return NULL_TREE; |
27bf414c JM |
1985 | if (!specs->declspecs_seen_p) |
1986 | { | |
1987 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
1988 | return NULL_TREE; | |
1989 | } | |
1990 | finish_declspecs (specs); | |
1991 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1992 | { | |
1993 | tree ret; | |
1994 | if (!specs->type_seen_p) | |
1995 | { | |
509c9d60 MLI |
1996 | pedwarn (decl_loc, OPT_pedantic, |
1997 | "ISO C forbids member declarations with no members"); | |
27bf414c JM |
1998 | shadow_tag_warned (specs, pedantic); |
1999 | ret = NULL_TREE; | |
2000 | } | |
2001 | else | |
2002 | { | |
2003 | /* Support for unnamed structs or unions as members of | |
2004 | structs or unions (which is [a] useful and [b] supports | |
2005 | MS P-SDK). */ | |
b9baeecd | 2006 | tree attrs = NULL; |
3d10ed6c AH |
2007 | |
2008 | ret = grokfield (c_parser_peek_token (parser)->location, | |
2009 | build_id_declarator (NULL_TREE), specs, | |
b9baeecd | 2010 | NULL_TREE, &attrs); |
0ad7e054 RS |
2011 | if (ret) |
2012 | decl_attributes (&ret, attrs, 0); | |
27bf414c JM |
2013 | } |
2014 | return ret; | |
2015 | } | |
2016 | pending_xref_error (); | |
2017 | prefix_attrs = specs->attrs; | |
2018 | all_prefix_attrs = prefix_attrs; | |
2019 | specs->attrs = NULL_TREE; | |
2020 | decls = NULL_TREE; | |
2021 | while (true) | |
2022 | { | |
2023 | /* Declaring one or more declarators or un-named bit-fields. */ | |
2024 | struct c_declarator *declarator; | |
2025 | bool dummy = false; | |
2026 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2027 | declarator = build_id_declarator (NULL_TREE); | |
2028 | else | |
2029 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2030 | C_DTR_NORMAL, &dummy); | |
2031 | if (declarator == NULL) | |
2032 | { | |
2033 | c_parser_skip_to_end_of_block_or_statement (parser); | |
2034 | break; | |
2035 | } | |
2036 | if (c_parser_next_token_is (parser, CPP_COLON) | |
2037 | || c_parser_next_token_is (parser, CPP_COMMA) | |
2038 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2039 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE) | |
2040 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2041 | { | |
2042 | tree postfix_attrs = NULL_TREE; | |
2043 | tree width = NULL_TREE; | |
2044 | tree d; | |
2045 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2046 | { | |
2047 | c_parser_consume_token (parser); | |
2048 | width = c_parser_expr_no_commas (parser, NULL).value; | |
2049 | } | |
2050 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2051 | postfix_attrs = c_parser_attributes (parser); | |
3d10ed6c AH |
2052 | d = grokfield (c_parser_peek_token (parser)->location, |
2053 | declarator, specs, width, &all_prefix_attrs); | |
27bf414c JM |
2054 | decl_attributes (&d, chainon (postfix_attrs, |
2055 | all_prefix_attrs), 0); | |
2056 | TREE_CHAIN (d) = decls; | |
2057 | decls = d; | |
2058 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2059 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
2060 | prefix_attrs); | |
2061 | else | |
2062 | all_prefix_attrs = prefix_attrs; | |
2063 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2064 | c_parser_consume_token (parser); | |
2065 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2066 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2067 | { | |
2068 | /* Semicolon consumed in caller. */ | |
2069 | break; | |
2070 | } | |
2071 | else | |
2072 | { | |
2073 | c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>"); | |
2074 | break; | |
2075 | } | |
2076 | } | |
2077 | else | |
2078 | { | |
2079 | c_parser_error (parser, | |
2080 | "expected %<:%>, %<,%>, %<;%>, %<}%> or " | |
2081 | "%<__attribute__%>"); | |
2082 | break; | |
2083 | } | |
2084 | } | |
2085 | return decls; | |
2086 | } | |
2087 | ||
2088 | /* Parse a typeof specifier (a GNU extension). | |
2089 | ||
2090 | typeof-specifier: | |
2091 | typeof ( expression ) | |
2092 | typeof ( type-name ) | |
2093 | */ | |
2094 | ||
2095 | static struct c_typespec | |
2096 | c_parser_typeof_specifier (c_parser *parser) | |
2097 | { | |
2098 | struct c_typespec ret; | |
2099 | ret.kind = ctsk_typeof; | |
2100 | ret.spec = error_mark_node; | |
928c19bb JM |
2101 | ret.expr = NULL_TREE; |
2102 | ret.expr_const_operands = true; | |
27bf414c JM |
2103 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF)); |
2104 | c_parser_consume_token (parser); | |
7d882b83 | 2105 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
2106 | in_typeof++; |
2107 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2108 | { | |
7d882b83 | 2109 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2110 | in_typeof--; |
2111 | return ret; | |
2112 | } | |
2113 | if (c_parser_next_token_starts_typename (parser)) | |
2114 | { | |
2115 | struct c_type_name *type = c_parser_type_name (parser); | |
7d882b83 | 2116 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2117 | in_typeof--; |
2118 | if (type != NULL) | |
2119 | { | |
928c19bb | 2120 | ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands); |
27bf414c JM |
2121 | pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE)); |
2122 | } | |
2123 | } | |
2124 | else | |
2125 | { | |
52ffd86e | 2126 | bool was_vm; |
c7412148 | 2127 | location_t here = c_parser_peek_token (parser)->location; |
27bf414c | 2128 | struct c_expr expr = c_parser_expression (parser); |
7d882b83 | 2129 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2130 | in_typeof--; |
2131 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
2132 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 2133 | error_at (here, "%<typeof%> applied to a bit-field"); |
27bf414c | 2134 | ret.spec = TREE_TYPE (expr.value); |
52ffd86e | 2135 | was_vm = variably_modified_type_p (ret.spec, NULL_TREE); |
928c19bb JM |
2136 | /* This is returned with the type so that when the type is |
2137 | evaluated, this can be evaluated. */ | |
2138 | if (was_vm) | |
2139 | ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands); | |
52ffd86e | 2140 | pop_maybe_used (was_vm); |
27bf414c JM |
2141 | } |
2142 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2143 | return ret; | |
2144 | } | |
2145 | ||
2146 | /* Parse a declarator, possibly an abstract declarator (C90 6.5.4, | |
2147 | 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may | |
2148 | be redeclared; otherwise it may not. KIND indicates which kind of | |
2149 | declarator is wanted. Returns a valid declarator except in the | |
2150 | case of a syntax error in which case NULL is returned. *SEEN_ID is | |
2151 | set to true if an identifier being declared is seen; this is used | |
2152 | to diagnose bad forms of abstract array declarators and to | |
2153 | determine whether an identifier list is syntactically permitted. | |
2154 | ||
2155 | declarator: | |
2156 | pointer[opt] direct-declarator | |
2157 | ||
2158 | direct-declarator: | |
2159 | identifier | |
2160 | ( attributes[opt] declarator ) | |
2161 | direct-declarator array-declarator | |
2162 | direct-declarator ( parameter-type-list ) | |
2163 | direct-declarator ( identifier-list[opt] ) | |
2164 | ||
2165 | pointer: | |
2166 | * type-qualifier-list[opt] | |
2167 | * type-qualifier-list[opt] pointer | |
2168 | ||
2169 | type-qualifier-list: | |
2170 | type-qualifier | |
2171 | attributes | |
2172 | type-qualifier-list type-qualifier | |
2173 | type-qualifier-list attributes | |
2174 | ||
2175 | parameter-type-list: | |
2176 | parameter-list | |
2177 | parameter-list , ... | |
2178 | ||
2179 | parameter-list: | |
2180 | parameter-declaration | |
2181 | parameter-list , parameter-declaration | |
2182 | ||
2183 | parameter-declaration: | |
2184 | declaration-specifiers declarator attributes[opt] | |
2185 | declaration-specifiers abstract-declarator[opt] attributes[opt] | |
2186 | ||
2187 | identifier-list: | |
2188 | identifier | |
2189 | identifier-list , identifier | |
2190 | ||
2191 | abstract-declarator: | |
2192 | pointer | |
2193 | pointer[opt] direct-abstract-declarator | |
2194 | ||
2195 | direct-abstract-declarator: | |
2196 | ( attributes[opt] abstract-declarator ) | |
2197 | direct-abstract-declarator[opt] array-declarator | |
2198 | direct-abstract-declarator[opt] ( parameter-type-list[opt] ) | |
2199 | ||
2200 | GNU extensions: | |
2201 | ||
2202 | direct-declarator: | |
2203 | direct-declarator ( parameter-forward-declarations | |
2204 | parameter-type-list[opt] ) | |
2205 | ||
2206 | direct-abstract-declarator: | |
c22cacf3 | 2207 | direct-abstract-declarator[opt] ( parameter-forward-declarations |
27bf414c JM |
2208 | parameter-type-list[opt] ) |
2209 | ||
2210 | parameter-forward-declarations: | |
2211 | parameter-list ; | |
2212 | parameter-forward-declarations parameter-list ; | |
2213 | ||
2214 | The uses of attributes shown above are GNU extensions. | |
2215 | ||
2216 | Some forms of array declarator are not included in C99 in the | |
2217 | syntax for abstract declarators; these are disallowed elsewhere. | |
2218 | This may be a defect (DR#289). | |
2219 | ||
2220 | This function also accepts an omitted abstract declarator as being | |
2221 | an abstract declarator, although not part of the formal syntax. */ | |
2222 | ||
2223 | static struct c_declarator * | |
2224 | c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2225 | bool *seen_id) | |
2226 | { | |
2227 | /* Parse any initial pointer part. */ | |
2228 | if (c_parser_next_token_is (parser, CPP_MULT)) | |
2229 | { | |
2230 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2231 | struct c_declarator *inner; | |
2232 | c_parser_consume_token (parser); | |
2233 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2234 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2235 | if (inner == NULL) | |
2236 | return NULL; | |
2237 | else | |
2238 | return make_pointer_declarator (quals_attrs, inner); | |
2239 | } | |
2240 | /* Now we have a direct declarator, direct abstract declarator or | |
2241 | nothing (which counts as a direct abstract declarator here). */ | |
2242 | return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id); | |
2243 | } | |
2244 | ||
2245 | /* Parse a direct declarator or direct abstract declarator; arguments | |
2246 | as c_parser_declarator. */ | |
2247 | ||
2248 | static struct c_declarator * | |
2249 | c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2250 | bool *seen_id) | |
2251 | { | |
2252 | /* The direct declarator must start with an identifier (possibly | |
2253 | omitted) or a parenthesized declarator (possibly abstract). In | |
2254 | an ordinary declarator, initial parentheses must start a | |
2255 | parenthesized declarator. In an abstract declarator or parameter | |
2256 | declarator, they could start a parenthesized declarator or a | |
2257 | parameter list. To tell which, the open parenthesis and any | |
2258 | following attributes must be read. If a declaration specifier | |
2259 | follows, then it is a parameter list; if the specifier is a | |
2260 | typedef name, there might be an ambiguity about redeclaring it, | |
2261 | which is resolved in the direction of treating it as a typedef | |
2262 | name. If a close parenthesis follows, it is also an empty | |
2263 | parameter list, as the syntax does not permit empty abstract | |
0fa2e4df | 2264 | declarators. Otherwise, it is a parenthesized declarator (in |
27bf414c JM |
2265 | which case the analysis may be repeated inside it, recursively). |
2266 | ||
2267 | ??? There is an ambiguity in a parameter declaration "int | |
2268 | (__attribute__((foo)) x)", where x is not a typedef name: it | |
2269 | could be an abstract declarator for a function, or declare x with | |
2270 | parentheses. The proper resolution of this ambiguity needs | |
2271 | documenting. At present we follow an accident of the old | |
2272 | parser's implementation, whereby the first parameter must have | |
2273 | some declaration specifiers other than just attributes. Thus as | |
0fa2e4df | 2274 | a parameter declaration it is treated as a parenthesized |
27bf414c JM |
2275 | parameter named x, and as an abstract declarator it is |
2276 | rejected. | |
2277 | ||
2278 | ??? Also following the old parser, attributes inside an empty | |
2279 | parameter list are ignored, making it a list not yielding a | |
2280 | prototype, rather than giving an error or making it have one | |
2281 | parameter with implicit type int. | |
2282 | ||
2283 | ??? Also following the old parser, typedef names may be | |
2284 | redeclared in declarators, but not Objective-C class names. */ | |
2285 | ||
2286 | if (kind != C_DTR_ABSTRACT | |
2287 | && c_parser_next_token_is (parser, CPP_NAME) | |
2288 | && ((type_seen_p | |
2289 | && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME) | |
2290 | || c_parser_peek_token (parser)->id_kind == C_ID_ID)) | |
2291 | { | |
2292 | struct c_declarator *inner | |
2293 | = build_id_declarator (c_parser_peek_token (parser)->value); | |
2294 | *seen_id = true; | |
6037d88d | 2295 | inner->id_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2296 | c_parser_consume_token (parser); |
2297 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2298 | } | |
2299 | ||
2300 | if (kind != C_DTR_NORMAL | |
2301 | && c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2302 | { | |
2303 | struct c_declarator *inner = build_id_declarator (NULL_TREE); | |
2304 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2305 | } | |
2306 | ||
2307 | /* Either we are at the end of an abstract declarator, or we have | |
2308 | parentheses. */ | |
2309 | ||
2310 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2311 | { | |
2312 | tree attrs; | |
2313 | struct c_declarator *inner; | |
2314 | c_parser_consume_token (parser); | |
2315 | attrs = c_parser_attributes (parser); | |
2316 | if (kind != C_DTR_NORMAL | |
2317 | && (c_parser_next_token_starts_declspecs (parser) | |
2318 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))) | |
2319 | { | |
2320 | struct c_arg_info *args | |
2321 | = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL, | |
2322 | attrs); | |
2323 | if (args == NULL) | |
2324 | return NULL; | |
2325 | else | |
2326 | { | |
2327 | inner | |
2328 | = build_function_declarator (args, | |
2329 | build_id_declarator (NULL_TREE)); | |
2330 | return c_parser_direct_declarator_inner (parser, *seen_id, | |
2331 | inner); | |
2332 | } | |
2333 | } | |
2334 | /* A parenthesized declarator. */ | |
2335 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2336 | if (inner != NULL && attrs != NULL) | |
2337 | inner = build_attrs_declarator (attrs, inner); | |
2338 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2339 | { | |
2340 | c_parser_consume_token (parser); | |
2341 | if (inner == NULL) | |
2342 | return NULL; | |
2343 | else | |
2344 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2345 | } | |
2346 | else | |
2347 | { | |
2348 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2349 | "expected %<)%>"); | |
2350 | return NULL; | |
2351 | } | |
2352 | } | |
2353 | else | |
2354 | { | |
2355 | if (kind == C_DTR_NORMAL) | |
2356 | { | |
2357 | c_parser_error (parser, "expected identifier or %<(%>"); | |
2358 | return NULL; | |
2359 | } | |
2360 | else | |
2361 | return build_id_declarator (NULL_TREE); | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | /* Parse part of a direct declarator or direct abstract declarator, | |
2366 | given that some (in INNER) has already been parsed; ID_PRESENT is | |
2367 | true if an identifier is present, false for an abstract | |
2368 | declarator. */ | |
2369 | ||
2370 | static struct c_declarator * | |
2371 | c_parser_direct_declarator_inner (c_parser *parser, bool id_present, | |
2372 | struct c_declarator *inner) | |
2373 | { | |
2374 | /* Parse a sequence of array declarators and parameter lists. */ | |
2375 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2376 | { | |
c2255bc4 | 2377 | location_t brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2378 | struct c_declarator *declarator; |
2379 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2380 | bool static_seen; | |
2381 | bool star_seen; | |
2382 | tree dimen; | |
2383 | c_parser_consume_token (parser); | |
2384 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2385 | static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC); | |
2386 | if (static_seen) | |
2387 | c_parser_consume_token (parser); | |
2388 | if (static_seen && !quals_attrs->declspecs_seen_p) | |
2389 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2390 | if (!quals_attrs->declspecs_seen_p) | |
2391 | quals_attrs = NULL; | |
2392 | /* If "static" is present, there must be an array dimension. | |
2393 | Otherwise, there may be a dimension, "*", or no | |
2394 | dimension. */ | |
2395 | if (static_seen) | |
2396 | { | |
2397 | star_seen = false; | |
2398 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2399 | } | |
2400 | else | |
2401 | { | |
2402 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2403 | { | |
2404 | dimen = NULL_TREE; | |
2405 | star_seen = false; | |
2406 | } | |
2407 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
2408 | { | |
2409 | if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE) | |
2410 | { | |
2411 | dimen = NULL_TREE; | |
2412 | star_seen = true; | |
2413 | c_parser_consume_token (parser); | |
2414 | } | |
2415 | else | |
2416 | { | |
2417 | star_seen = false; | |
2418 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2419 | } | |
2420 | } | |
2421 | else | |
2422 | { | |
2423 | star_seen = false; | |
2424 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2425 | } | |
2426 | } | |
2427 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2428 | c_parser_consume_token (parser); | |
2429 | else | |
2430 | { | |
2431 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
2432 | "expected %<]%>"); | |
2433 | return NULL; | |
2434 | } | |
c2255bc4 AH |
2435 | declarator = build_array_declarator (brace_loc, dimen, quals_attrs, |
2436 | static_seen, star_seen); | |
52ffd86e MS |
2437 | if (declarator == NULL) |
2438 | return NULL; | |
6ac0194d | 2439 | inner = set_array_declarator_inner (declarator, inner); |
27bf414c JM |
2440 | return c_parser_direct_declarator_inner (parser, id_present, inner); |
2441 | } | |
2442 | else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2443 | { | |
2444 | tree attrs; | |
2445 | struct c_arg_info *args; | |
2446 | c_parser_consume_token (parser); | |
2447 | attrs = c_parser_attributes (parser); | |
2448 | args = c_parser_parms_declarator (parser, id_present, attrs); | |
2449 | if (args == NULL) | |
2450 | return NULL; | |
2451 | else | |
2452 | { | |
2453 | inner = build_function_declarator (args, inner); | |
2454 | return c_parser_direct_declarator_inner (parser, id_present, inner); | |
2455 | } | |
2456 | } | |
2457 | return inner; | |
2458 | } | |
2459 | ||
2460 | /* Parse a parameter list or identifier list, including the closing | |
2461 | parenthesis but not the opening one. ATTRS are the attributes at | |
2462 | the start of the list. ID_LIST_OK is true if an identifier list is | |
2463 | acceptable; such a list must not have attributes at the start. */ | |
2464 | ||
2465 | static struct c_arg_info * | |
2466 | c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs) | |
2467 | { | |
2468 | push_scope (); | |
2469 | declare_parm_level (); | |
2470 | /* If the list starts with an identifier, it is an identifier list. | |
2471 | Otherwise, it is either a prototype list or an empty list. */ | |
2472 | if (id_list_ok | |
2473 | && !attrs | |
2474 | && c_parser_next_token_is (parser, CPP_NAME) | |
2475 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2476 | { | |
7fa3585c | 2477 | tree list = NULL_TREE, *nextp = &list; |
27bf414c JM |
2478 | while (c_parser_next_token_is (parser, CPP_NAME) |
2479 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2480 | { | |
7fa3585c GK |
2481 | *nextp = build_tree_list (NULL_TREE, |
2482 | c_parser_peek_token (parser)->value); | |
2483 | nextp = & TREE_CHAIN (*nextp); | |
27bf414c JM |
2484 | c_parser_consume_token (parser); |
2485 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
2486 | break; | |
2487 | c_parser_consume_token (parser); | |
2488 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2489 | { | |
2490 | c_parser_error (parser, "expected identifier"); | |
2491 | break; | |
2492 | } | |
2493 | } | |
2494 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2495 | { | |
2496 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2497 | ret->parms = 0; | |
2498 | ret->tags = 0; | |
2499 | ret->types = list; | |
2500 | ret->others = 0; | |
3542a5c0 | 2501 | ret->pending_sizes = 0; |
6a1f8611 | 2502 | ret->had_vla_unspec = 0; |
27bf414c JM |
2503 | c_parser_consume_token (parser); |
2504 | pop_scope (); | |
2505 | return ret; | |
2506 | } | |
2507 | else | |
2508 | { | |
2509 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2510 | "expected %<)%>"); | |
2511 | pop_scope (); | |
2512 | return NULL; | |
2513 | } | |
2514 | } | |
2515 | else | |
2516 | { | |
2517 | struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs); | |
2518 | pop_scope (); | |
2519 | return ret; | |
2520 | } | |
2521 | } | |
2522 | ||
2523 | /* Parse a parameter list (possibly empty), including the closing | |
2524 | parenthesis but not the opening one. ATTRS are the attributes at | |
2525 | the start of the list. */ | |
2526 | ||
2527 | static struct c_arg_info * | |
2528 | c_parser_parms_list_declarator (c_parser *parser, tree attrs) | |
2529 | { | |
2530 | bool good_parm = false; | |
2531 | /* ??? Following the old parser, forward parameter declarations may | |
2532 | use abstract declarators, and if no real parameter declarations | |
2533 | follow the forward declarations then this is not diagnosed. Also | |
2534 | note as above that attributes are ignored as the only contents of | |
2535 | the parentheses, or as the only contents after forward | |
2536 | declarations. */ | |
2537 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2538 | { | |
2539 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2540 | ret->parms = 0; | |
2541 | ret->tags = 0; | |
2542 | ret->types = 0; | |
2543 | ret->others = 0; | |
3542a5c0 | 2544 | ret->pending_sizes = 0; |
6a1f8611 | 2545 | ret->had_vla_unspec = 0; |
27bf414c JM |
2546 | c_parser_consume_token (parser); |
2547 | return ret; | |
2548 | } | |
2549 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2550 | { | |
2551 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2552 | ret->parms = 0; | |
2553 | ret->tags = 0; | |
2554 | ret->others = 0; | |
3542a5c0 | 2555 | ret->pending_sizes = 0; |
6a1f8611 | 2556 | ret->had_vla_unspec = 0; |
27bf414c JM |
2557 | /* Suppress -Wold-style-definition for this case. */ |
2558 | ret->types = error_mark_node; | |
3ba09659 AH |
2559 | error_at (c_parser_peek_token (parser)->location, |
2560 | "ISO C requires a named argument before %<...%>"); | |
27bf414c JM |
2561 | c_parser_consume_token (parser); |
2562 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2563 | { | |
2564 | c_parser_consume_token (parser); | |
2565 | return ret; | |
2566 | } | |
2567 | else | |
2568 | { | |
2569 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2570 | "expected %<)%>"); | |
2571 | return NULL; | |
2572 | } | |
2573 | } | |
2574 | /* Nonempty list of parameters, either terminated with semicolon | |
2575 | (forward declarations; recurse) or with close parenthesis (normal | |
2576 | function) or with ", ... )" (variadic function). */ | |
2577 | while (true) | |
2578 | { | |
2579 | /* Parse a parameter. */ | |
2580 | struct c_parm *parm = c_parser_parameter_declaration (parser, attrs); | |
2581 | attrs = NULL_TREE; | |
2582 | if (parm != NULL) | |
2583 | { | |
2584 | good_parm = true; | |
2585 | push_parm_decl (parm); | |
2586 | } | |
2587 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2588 | { | |
2589 | tree new_attrs; | |
2590 | c_parser_consume_token (parser); | |
91d975b8 | 2591 | mark_forward_parm_decls (); |
27bf414c JM |
2592 | new_attrs = c_parser_attributes (parser); |
2593 | return c_parser_parms_list_declarator (parser, new_attrs); | |
2594 | } | |
2595 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2596 | { | |
2597 | c_parser_consume_token (parser); | |
2598 | if (good_parm) | |
2599 | return get_parm_info (false); | |
2600 | else | |
2601 | { | |
2602 | struct c_arg_info *ret | |
2603 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2604 | ret->parms = 0; | |
2605 | ret->tags = 0; | |
2606 | ret->types = 0; | |
2607 | ret->others = 0; | |
3542a5c0 | 2608 | ret->pending_sizes = 0; |
6a1f8611 | 2609 | ret->had_vla_unspec = 0; |
27bf414c JM |
2610 | return ret; |
2611 | } | |
2612 | } | |
2613 | if (!c_parser_require (parser, CPP_COMMA, | |
2614 | "expected %<;%>, %<,%> or %<)%>")) | |
2615 | { | |
2616 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
f007042e | 2617 | get_pending_sizes (); |
27bf414c JM |
2618 | return NULL; |
2619 | } | |
2620 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2621 | { | |
2622 | c_parser_consume_token (parser); | |
2623 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2624 | { | |
2625 | c_parser_consume_token (parser); | |
2626 | if (good_parm) | |
2627 | return get_parm_info (true); | |
2628 | else | |
2629 | { | |
2630 | struct c_arg_info *ret | |
2631 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2632 | ret->parms = 0; | |
2633 | ret->tags = 0; | |
2634 | ret->types = 0; | |
2635 | ret->others = 0; | |
3542a5c0 | 2636 | ret->pending_sizes = 0; |
6a1f8611 | 2637 | ret->had_vla_unspec = 0; |
27bf414c JM |
2638 | return ret; |
2639 | } | |
2640 | } | |
2641 | else | |
2642 | { | |
2643 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2644 | "expected %<)%>"); | |
f007042e | 2645 | get_pending_sizes (); |
27bf414c JM |
2646 | return NULL; |
2647 | } | |
2648 | } | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | /* Parse a parameter declaration. ATTRS are the attributes at the | |
2653 | start of the declaration if it is the first parameter. */ | |
2654 | ||
2655 | static struct c_parm * | |
2656 | c_parser_parameter_declaration (c_parser *parser, tree attrs) | |
2657 | { | |
2658 | struct c_declspecs *specs; | |
2659 | struct c_declarator *declarator; | |
2660 | tree prefix_attrs; | |
2661 | tree postfix_attrs = NULL_TREE; | |
2662 | bool dummy = false; | |
2663 | if (!c_parser_next_token_starts_declspecs (parser)) | |
2664 | { | |
2665 | /* ??? In some Objective-C cases '...' isn't applicable so there | |
2666 | should be a different message. */ | |
2667 | c_parser_error (parser, | |
2668 | "expected declaration specifiers or %<...%>"); | |
2669 | c_parser_skip_to_end_of_parameter (parser); | |
2670 | return NULL; | |
2671 | } | |
2672 | specs = build_null_declspecs (); | |
2673 | if (attrs) | |
2674 | { | |
2675 | declspecs_add_attrs (specs, attrs); | |
2676 | attrs = NULL_TREE; | |
2677 | } | |
2678 | c_parser_declspecs (parser, specs, true, true, true); | |
2679 | finish_declspecs (specs); | |
2680 | pending_xref_error (); | |
2681 | prefix_attrs = specs->attrs; | |
2682 | specs->attrs = NULL_TREE; | |
2683 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2684 | C_DTR_PARM, &dummy); | |
2685 | if (declarator == NULL) | |
2686 | { | |
2687 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
2688 | return NULL; | |
2689 | } | |
2690 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2691 | postfix_attrs = c_parser_attributes (parser); | |
2692 | return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs), | |
2693 | declarator); | |
2694 | } | |
2695 | ||
2696 | /* Parse a string literal in an asm expression. It should not be | |
2697 | translated, and wide string literals are an error although | |
2698 | permitted by the syntax. This is a GNU extension. | |
2699 | ||
2700 | asm-string-literal: | |
2701 | string-literal | |
2702 | ||
2703 | ??? At present, following the old parser, the caller needs to have | |
46c2514e TT |
2704 | set lex_untranslated_string to 1. It would be better to follow the |
2705 | C++ parser rather than using this kludge. */ | |
27bf414c JM |
2706 | |
2707 | static tree | |
2708 | c_parser_asm_string_literal (c_parser *parser) | |
2709 | { | |
2710 | tree str; | |
2711 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
2712 | { | |
2713 | str = c_parser_peek_token (parser)->value; | |
2714 | c_parser_consume_token (parser); | |
2715 | } | |
2716 | else if (c_parser_next_token_is (parser, CPP_WSTRING)) | |
2717 | { | |
3ba09659 AH |
2718 | error_at (c_parser_peek_token (parser)->location, |
2719 | "wide string literal in %<asm%>"); | |
27bf414c JM |
2720 | str = build_string (1, ""); |
2721 | c_parser_consume_token (parser); | |
2722 | } | |
2723 | else | |
2724 | { | |
2725 | c_parser_error (parser, "expected string literal"); | |
2726 | str = NULL_TREE; | |
2727 | } | |
2728 | return str; | |
2729 | } | |
2730 | ||
2731 | /* Parse a simple asm expression. This is used in restricted | |
2732 | contexts, where a full expression with inputs and outputs does not | |
2733 | make sense. This is a GNU extension. | |
2734 | ||
2735 | simple-asm-expr: | |
2736 | asm ( asm-string-literal ) | |
2737 | */ | |
2738 | ||
2739 | static tree | |
2740 | c_parser_simple_asm_expr (c_parser *parser) | |
2741 | { | |
2742 | tree str; | |
2743 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
2744 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2745 | lex_untranslated_string kludge. */ |
2746 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2747 | c_parser_consume_token (parser); |
2748 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2749 | { | |
46c2514e | 2750 | parser->lex_untranslated_string = false; |
27bf414c JM |
2751 | return NULL_TREE; |
2752 | } | |
2753 | str = c_parser_asm_string_literal (parser); | |
46c2514e | 2754 | parser->lex_untranslated_string = false; |
27bf414c JM |
2755 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
2756 | { | |
2757 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2758 | return NULL_TREE; | |
2759 | } | |
2760 | return str; | |
2761 | } | |
2762 | ||
2763 | /* Parse (possibly empty) attributes. This is a GNU extension. | |
2764 | ||
2765 | attributes: | |
2766 | empty | |
2767 | attributes attribute | |
2768 | ||
2769 | attribute: | |
2770 | __attribute__ ( ( attribute-list ) ) | |
2771 | ||
2772 | attribute-list: | |
2773 | attrib | |
2774 | attribute_list , attrib | |
2775 | ||
2776 | attrib: | |
2777 | empty | |
2778 | any-word | |
2779 | any-word ( identifier ) | |
2780 | any-word ( identifier , nonempty-expr-list ) | |
2781 | any-word ( expr-list ) | |
2782 | ||
2783 | where the "identifier" must not be declared as a type, and | |
2784 | "any-word" may be any identifier (including one declared as a | |
2785 | type), a reserved word storage class specifier, type specifier or | |
2786 | type qualifier. ??? This still leaves out most reserved keywords | |
2787 | (following the old parser), shouldn't we include them, and why not | |
2788 | allow identifiers declared as types to start the arguments? */ | |
2789 | ||
2790 | static tree | |
2791 | c_parser_attributes (c_parser *parser) | |
2792 | { | |
2793 | tree attrs = NULL_TREE; | |
2794 | while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2795 | { | |
2796 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2797 | lex_untranslated_string kludge. */ |
2798 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2799 | c_parser_consume_token (parser); |
2800 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2801 | { | |
46c2514e | 2802 | parser->lex_untranslated_string = false; |
27bf414c JM |
2803 | return attrs; |
2804 | } | |
2805 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2806 | { | |
46c2514e | 2807 | parser->lex_untranslated_string = false; |
27bf414c JM |
2808 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
2809 | return attrs; | |
2810 | } | |
2811 | /* Parse the attribute list. */ | |
2812 | while (c_parser_next_token_is (parser, CPP_COMMA) | |
2813 | || c_parser_next_token_is (parser, CPP_NAME) | |
2814 | || c_parser_next_token_is (parser, CPP_KEYWORD)) | |
2815 | { | |
2816 | tree attr, attr_name, attr_args; | |
bbbbb16a | 2817 | VEC(tree,gc) *expr_list; |
27bf414c JM |
2818 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
2819 | { | |
2820 | c_parser_consume_token (parser); | |
2821 | continue; | |
2822 | } | |
2823 | if (c_parser_next_token_is (parser, CPP_KEYWORD)) | |
2824 | { | |
2825 | /* ??? See comment above about what keywords are | |
2826 | accepted here. */ | |
2827 | bool ok; | |
2828 | switch (c_parser_peek_token (parser)->keyword) | |
2829 | { | |
2830 | case RID_STATIC: | |
2831 | case RID_UNSIGNED: | |
2832 | case RID_LONG: | |
2833 | case RID_CONST: | |
2834 | case RID_EXTERN: | |
2835 | case RID_REGISTER: | |
2836 | case RID_TYPEDEF: | |
2837 | case RID_SHORT: | |
2838 | case RID_INLINE: | |
2839 | case RID_VOLATILE: | |
2840 | case RID_SIGNED: | |
2841 | case RID_AUTO: | |
2842 | case RID_RESTRICT: | |
2843 | case RID_COMPLEX: | |
2844 | case RID_THREAD: | |
2845 | case RID_INT: | |
2846 | case RID_CHAR: | |
2847 | case RID_FLOAT: | |
2848 | case RID_DOUBLE: | |
2849 | case RID_VOID: | |
9a8ce21f JG |
2850 | case RID_DFLOAT32: |
2851 | case RID_DFLOAT64: | |
2852 | case RID_DFLOAT128: | |
27bf414c | 2853 | case RID_BOOL: |
ab22c1fa CF |
2854 | case RID_FRACT: |
2855 | case RID_ACCUM: | |
2856 | case RID_SAT: | |
27bf414c JM |
2857 | ok = true; |
2858 | break; | |
2859 | default: | |
2860 | ok = false; | |
2861 | break; | |
2862 | } | |
2863 | if (!ok) | |
2864 | break; | |
5dc4a7f4 JJ |
2865 | /* Accept __attribute__((__const)) as __attribute__((const)) |
2866 | etc. */ | |
2867 | attr_name | |
2868 | = ridpointers[(int) c_parser_peek_token (parser)->keyword]; | |
27bf414c | 2869 | } |
5dc4a7f4 JJ |
2870 | else |
2871 | attr_name = c_parser_peek_token (parser)->value; | |
27bf414c JM |
2872 | c_parser_consume_token (parser); |
2873 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) | |
2874 | { | |
2875 | attr = build_tree_list (attr_name, NULL_TREE); | |
2876 | attrs = chainon (attrs, attr); | |
2877 | continue; | |
2878 | } | |
2879 | c_parser_consume_token (parser); | |
2880 | /* Parse the attribute contents. If they start with an | |
2881 | identifier which is followed by a comma or close | |
2882 | parenthesis, then the arguments start with that | |
2883 | identifier; otherwise they are an expression list. */ | |
2884 | if (c_parser_next_token_is (parser, CPP_NAME) | |
2885 | && c_parser_peek_token (parser)->id_kind == C_ID_ID | |
2886 | && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA) | |
2887 | || (c_parser_peek_2nd_token (parser)->type | |
2888 | == CPP_CLOSE_PAREN))) | |
2889 | { | |
2890 | tree arg1 = c_parser_peek_token (parser)->value; | |
2891 | c_parser_consume_token (parser); | |
2892 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2893 | attr_args = build_tree_list (NULL_TREE, arg1); | |
2894 | else | |
2895 | { | |
bbbbb16a | 2896 | tree tree_list; |
27bf414c | 2897 | c_parser_consume_token (parser); |
bbbbb16a | 2898 | expr_list = c_parser_expr_list (parser, false, true, NULL); |
c166b898 | 2899 | tree_list = build_tree_list_vec (expr_list); |
bbbbb16a | 2900 | attr_args = tree_cons (NULL_TREE, arg1, tree_list); |
c166b898 | 2901 | release_tree_vector (expr_list); |
27bf414c JM |
2902 | } |
2903 | } | |
2904 | else | |
2905 | { | |
2906 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2907 | attr_args = NULL_TREE; | |
2908 | else | |
bbbbb16a ILT |
2909 | { |
2910 | expr_list = c_parser_expr_list (parser, false, true, NULL); | |
c166b898 ILT |
2911 | attr_args = build_tree_list_vec (expr_list); |
2912 | release_tree_vector (expr_list); | |
bbbbb16a | 2913 | } |
27bf414c JM |
2914 | } |
2915 | attr = build_tree_list (attr_name, attr_args); | |
2916 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2917 | c_parser_consume_token (parser); | |
2918 | else | |
2919 | { | |
46c2514e | 2920 | parser->lex_untranslated_string = false; |
27bf414c JM |
2921 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2922 | "expected %<)%>"); | |
2923 | return attrs; | |
2924 | } | |
2925 | attrs = chainon (attrs, attr); | |
2926 | } | |
2927 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2928 | c_parser_consume_token (parser); | |
2929 | else | |
2930 | { | |
46c2514e | 2931 | parser->lex_untranslated_string = false; |
27bf414c JM |
2932 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2933 | "expected %<)%>"); | |
2934 | return attrs; | |
2935 | } | |
2936 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2937 | c_parser_consume_token (parser); | |
2938 | else | |
2939 | { | |
46c2514e | 2940 | parser->lex_untranslated_string = false; |
27bf414c JM |
2941 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2942 | "expected %<)%>"); | |
2943 | return attrs; | |
2944 | } | |
46c2514e | 2945 | parser->lex_untranslated_string = false; |
27bf414c JM |
2946 | } |
2947 | return attrs; | |
2948 | } | |
2949 | ||
2950 | /* Parse a type name (C90 6.5.5, C99 6.7.6). | |
2951 | ||
2952 | type-name: | |
2953 | specifier-qualifier-list abstract-declarator[opt] | |
2954 | */ | |
2955 | ||
2956 | static struct c_type_name * | |
2957 | c_parser_type_name (c_parser *parser) | |
2958 | { | |
2959 | struct c_declspecs *specs = build_null_declspecs (); | |
2960 | struct c_declarator *declarator; | |
2961 | struct c_type_name *ret; | |
2962 | bool dummy = false; | |
2963 | c_parser_declspecs (parser, specs, false, true, true); | |
2964 | if (!specs->declspecs_seen_p) | |
2965 | { | |
2966 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
2967 | return NULL; | |
2968 | } | |
2969 | pending_xref_error (); | |
2970 | finish_declspecs (specs); | |
2971 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2972 | C_DTR_ABSTRACT, &dummy); | |
2973 | if (declarator == NULL) | |
2974 | return NULL; | |
2975 | ret = XOBNEW (&parser_obstack, struct c_type_name); | |
2976 | ret->specs = specs; | |
2977 | ret->declarator = declarator; | |
2978 | return ret; | |
2979 | } | |
2980 | ||
2981 | /* Parse an initializer (C90 6.5.7, C99 6.7.8). | |
2982 | ||
2983 | initializer: | |
2984 | assignment-expression | |
2985 | { initializer-list } | |
2986 | { initializer-list , } | |
2987 | ||
2988 | initializer-list: | |
2989 | designation[opt] initializer | |
2990 | initializer-list , designation[opt] initializer | |
2991 | ||
2992 | designation: | |
2993 | designator-list = | |
2994 | ||
2995 | designator-list: | |
2996 | designator | |
2997 | designator-list designator | |
2998 | ||
2999 | designator: | |
3000 | array-designator | |
3001 | . identifier | |
3002 | ||
3003 | array-designator: | |
3004 | [ constant-expression ] | |
3005 | ||
3006 | GNU extensions: | |
3007 | ||
3008 | initializer: | |
3009 | { } | |
3010 | ||
3011 | designation: | |
3012 | array-designator | |
3013 | identifier : | |
3014 | ||
3015 | array-designator: | |
3016 | [ constant-expression ... constant-expression ] | |
3017 | ||
3018 | Any expression without commas is accepted in the syntax for the | |
3019 | constant-expressions, with non-constant expressions rejected later. | |
3020 | ||
3021 | This function is only used for top-level initializers; for nested | |
3022 | ones, see c_parser_initval. */ | |
3023 | ||
3024 | static struct c_expr | |
3025 | c_parser_initializer (c_parser *parser) | |
3026 | { | |
3027 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3028 | return c_parser_braced_init (parser, NULL_TREE, false); | |
3029 | else | |
46bdb9cf JM |
3030 | { |
3031 | struct c_expr ret; | |
c2255bc4 | 3032 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3033 | ret = c_parser_expr_no_commas (parser, NULL); |
3034 | if (TREE_CODE (ret.value) != STRING_CST | |
3035 | && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR) | |
c2255bc4 | 3036 | ret = default_function_array_conversion (loc, ret); |
46bdb9cf JM |
3037 | return ret; |
3038 | } | |
27bf414c JM |
3039 | } |
3040 | ||
3041 | /* Parse a braced initializer list. TYPE is the type specified for a | |
3042 | compound literal, and NULL_TREE for other initializers and for | |
3043 | nested braced lists. NESTED_P is true for nested braced lists, | |
3044 | false for the list of a compound literal or the list that is the | |
3045 | top-level initializer in a declaration. */ | |
3046 | ||
3047 | static struct c_expr | |
3048 | c_parser_braced_init (c_parser *parser, tree type, bool nested_p) | |
3049 | { | |
c7412148 | 3050 | location_t brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3051 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); |
3052 | c_parser_consume_token (parser); | |
3053 | if (nested_p) | |
3054 | push_init_level (0); | |
3055 | else | |
3056 | really_start_incremental_init (type); | |
3057 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3058 | { | |
509c9d60 | 3059 | pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces"); |
27bf414c JM |
3060 | } |
3061 | else | |
3062 | { | |
3063 | /* Parse a non-empty initializer list, possibly with a trailing | |
3064 | comma. */ | |
3065 | while (true) | |
3066 | { | |
3067 | c_parser_initelt (parser); | |
3068 | if (parser->error) | |
3069 | break; | |
3070 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3071 | c_parser_consume_token (parser); | |
3072 | else | |
3073 | break; | |
3074 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3075 | break; | |
3076 | } | |
3077 | } | |
3078 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3079 | { | |
3080 | struct c_expr ret; | |
3081 | ret.value = error_mark_node; | |
3082 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 3083 | ret.original_type = NULL; |
27bf414c | 3084 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>"); |
a47e20fd | 3085 | pop_init_level (0); |
27bf414c JM |
3086 | return ret; |
3087 | } | |
3088 | c_parser_consume_token (parser); | |
3089 | return pop_init_level (0); | |
3090 | } | |
3091 | ||
3092 | /* Parse a nested initializer, including designators. */ | |
3093 | ||
3094 | static void | |
3095 | c_parser_initelt (c_parser *parser) | |
3096 | { | |
3097 | /* Parse any designator or designator list. A single array | |
3098 | designator may have the subsequent "=" omitted in GNU C, but a | |
3099 | longer list or a structure member designator may not. */ | |
3100 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3101 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
3102 | { | |
3103 | /* Old-style structure member designator. */ | |
3104 | set_init_label (c_parser_peek_token (parser)->value); | |
fcf73884 | 3105 | /* Use the colon as the error location. */ |
509c9d60 MLI |
3106 | pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic, |
3107 | "obsolete use of designated initializer with %<:%>"); | |
27bf414c JM |
3108 | c_parser_consume_token (parser); |
3109 | c_parser_consume_token (parser); | |
3110 | } | |
3111 | else | |
3112 | { | |
3113 | /* des_seen is 0 if there have been no designators, 1 if there | |
3114 | has been a single array designator and 2 otherwise. */ | |
3115 | int des_seen = 0; | |
c7412148 | 3116 | /* Location of a designator. */ |
922f2908 | 3117 | location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3118 | while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE) |
3119 | || c_parser_next_token_is (parser, CPP_DOT)) | |
3120 | { | |
3121 | int des_prev = des_seen; | |
c7412148 TT |
3122 | if (!des_seen) |
3123 | des_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3124 | if (des_seen < 2) |
3125 | des_seen++; | |
3126 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
3127 | { | |
3128 | des_seen = 2; | |
3129 | c_parser_consume_token (parser); | |
3130 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3131 | { | |
3132 | set_init_label (c_parser_peek_token (parser)->value); | |
3133 | c_parser_consume_token (parser); | |
3134 | } | |
3135 | else | |
3136 | { | |
3137 | struct c_expr init; | |
3138 | init.value = error_mark_node; | |
3139 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3140 | init.original_type = NULL; |
27bf414c JM |
3141 | c_parser_error (parser, "expected identifier"); |
3142 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
b295aee2 | 3143 | process_init_element (init, false); |
27bf414c JM |
3144 | return; |
3145 | } | |
3146 | } | |
3147 | else | |
3148 | { | |
3149 | tree first, second; | |
922f2908 | 3150 | location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3151 | /* ??? Following the old parser, [ objc-receiver |
3152 | objc-message-args ] is accepted as an initializer, | |
3153 | being distinguished from a designator by what follows | |
3154 | the first assignment expression inside the square | |
3155 | brackets, but after a first array designator a | |
3156 | subsequent square bracket is for Objective-C taken to | |
3157 | start an expression, using the obsolete form of | |
3158 | designated initializer without '=', rather than | |
3159 | possibly being a second level of designation: in LALR | |
3160 | terms, the '[' is shifted rather than reducing | |
3161 | designator to designator-list. */ | |
3162 | if (des_prev == 1 && c_dialect_objc ()) | |
3163 | { | |
3164 | des_seen = des_prev; | |
3165 | break; | |
3166 | } | |
3167 | if (des_prev == 0 && c_dialect_objc ()) | |
3168 | { | |
3169 | /* This might be an array designator or an | |
3170 | Objective-C message expression. If the former, | |
3171 | continue parsing here; if the latter, parse the | |
3172 | remainder of the initializer given the starting | |
3173 | primary-expression. ??? It might make sense to | |
3174 | distinguish when des_prev == 1 as well; see | |
3175 | previous comment. */ | |
3176 | tree rec, args; | |
3177 | struct c_expr mexpr; | |
3178 | c_parser_consume_token (parser); | |
3179 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
3180 | && ((c_parser_peek_token (parser)->id_kind | |
3181 | == C_ID_TYPENAME) | |
3182 | || (c_parser_peek_token (parser)->id_kind | |
3183 | == C_ID_CLASSNAME))) | |
3184 | { | |
3185 | /* Type name receiver. */ | |
3186 | tree id = c_parser_peek_token (parser)->value; | |
3187 | c_parser_consume_token (parser); | |
3188 | rec = objc_get_class_reference (id); | |
3189 | goto parse_message_args; | |
3190 | } | |
3191 | first = c_parser_expr_no_commas (parser, NULL).value; | |
3192 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS) | |
3193 | || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3194 | goto array_desig_after_first; | |
3195 | /* Expression receiver. So far only one part | |
3196 | without commas has been parsed; there might be | |
3197 | more of the expression. */ | |
3198 | rec = first; | |
3199 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
3200 | { | |
f2a71bbc | 3201 | struct c_expr next; |
c2255bc4 AH |
3202 | location_t comma_loc, exp_loc; |
3203 | comma_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 3204 | c_parser_consume_token (parser); |
c2255bc4 | 3205 | exp_loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 3206 | next = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 AH |
3207 | next = default_function_array_conversion (exp_loc, next); |
3208 | rec = build_compound_expr (comma_loc, rec, next.value); | |
27bf414c JM |
3209 | } |
3210 | parse_message_args: | |
3211 | /* Now parse the objc-message-args. */ | |
3212 | args = c_parser_objc_message_args (parser); | |
3213 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3214 | "expected %<]%>"); | |
3215 | mexpr.value | |
3216 | = objc_build_message_expr (build_tree_list (rec, args)); | |
3217 | mexpr.original_code = ERROR_MARK; | |
6866c6e8 | 3218 | mexpr.original_type = NULL; |
27bf414c JM |
3219 | /* Now parse and process the remainder of the |
3220 | initializer, starting with this message | |
3221 | expression as a primary-expression. */ | |
3222 | c_parser_initval (parser, &mexpr); | |
3223 | return; | |
3224 | } | |
3225 | c_parser_consume_token (parser); | |
3226 | first = c_parser_expr_no_commas (parser, NULL).value; | |
3227 | array_desig_after_first: | |
3228 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3229 | { | |
c7412148 | 3230 | ellipsis_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3231 | c_parser_consume_token (parser); |
3232 | second = c_parser_expr_no_commas (parser, NULL).value; | |
3233 | } | |
3234 | else | |
3235 | second = NULL_TREE; | |
3236 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3237 | { | |
3238 | c_parser_consume_token (parser); | |
3239 | set_init_index (first, second); | |
fcf73884 | 3240 | if (second) |
509c9d60 MLI |
3241 | pedwarn (ellipsis_loc, OPT_pedantic, |
3242 | "ISO C forbids specifying range of elements to initialize"); | |
27bf414c JM |
3243 | } |
3244 | else | |
3245 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3246 | "expected %<]%>"); | |
3247 | } | |
3248 | } | |
3249 | if (des_seen >= 1) | |
3250 | { | |
3251 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
3252 | { | |
fcf73884 | 3253 | if (!flag_isoc99) |
509c9d60 MLI |
3254 | pedwarn (des_loc, OPT_pedantic, |
3255 | "ISO C90 forbids specifying subobject to initialize"); | |
27bf414c JM |
3256 | c_parser_consume_token (parser); |
3257 | } | |
3258 | else | |
3259 | { | |
3260 | if (des_seen == 1) | |
509c9d60 MLI |
3261 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
3262 | "obsolete use of designated initializer without %<=%>"); | |
27bf414c JM |
3263 | else |
3264 | { | |
3265 | struct c_expr init; | |
3266 | init.value = error_mark_node; | |
3267 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3268 | init.original_type = NULL; |
27bf414c JM |
3269 | c_parser_error (parser, "expected %<=%>"); |
3270 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
b295aee2 | 3271 | process_init_element (init, false); |
27bf414c JM |
3272 | return; |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | } | |
3277 | c_parser_initval (parser, NULL); | |
3278 | } | |
3279 | ||
3280 | /* Parse a nested initializer; as c_parser_initializer but parses | |
3281 | initializers within braced lists, after any designators have been | |
3282 | applied. If AFTER is not NULL then it is an Objective-C message | |
3283 | expression which is the primary-expression starting the | |
3284 | initializer. */ | |
3285 | ||
3286 | static void | |
3287 | c_parser_initval (c_parser *parser, struct c_expr *after) | |
3288 | { | |
3289 | struct c_expr init; | |
3290 | gcc_assert (!after || c_dialect_objc ()); | |
3291 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after) | |
3292 | init = c_parser_braced_init (parser, NULL_TREE, true); | |
3293 | else | |
46bdb9cf | 3294 | { |
c2255bc4 | 3295 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3296 | init = c_parser_expr_no_commas (parser, after); |
3297 | if (init.value != NULL_TREE | |
3298 | && TREE_CODE (init.value) != STRING_CST | |
3299 | && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR) | |
c2255bc4 | 3300 | init = default_function_array_conversion (loc, init); |
46bdb9cf | 3301 | } |
b295aee2 | 3302 | process_init_element (init, false); |
27bf414c JM |
3303 | } |
3304 | ||
3305 | /* Parse a compound statement (possibly a function body) (C90 6.6.2, | |
3306 | C99 6.8.2). | |
3307 | ||
3308 | compound-statement: | |
3309 | { block-item-list[opt] } | |
3310 | { label-declarations block-item-list } | |
3311 | ||
3312 | block-item-list: | |
3313 | block-item | |
3314 | block-item-list block-item | |
3315 | ||
3316 | block-item: | |
3317 | nested-declaration | |
3318 | statement | |
3319 | ||
3320 | nested-declaration: | |
3321 | declaration | |
3322 | ||
3323 | GNU extensions: | |
3324 | ||
3325 | compound-statement: | |
3326 | { label-declarations block-item-list } | |
3327 | ||
3328 | nested-declaration: | |
3329 | __extension__ nested-declaration | |
3330 | nested-function-definition | |
3331 | ||
3332 | label-declarations: | |
3333 | label-declaration | |
3334 | label-declarations label-declaration | |
3335 | ||
3336 | label-declaration: | |
3337 | __label__ identifier-list ; | |
3338 | ||
3339 | Allowing the mixing of declarations and code is new in C99. The | |
3340 | GNU syntax also permits (not shown above) labels at the end of | |
3341 | compound statements, which yield an error. We don't allow labels | |
3342 | on declarations; this might seem like a natural extension, but | |
3343 | there would be a conflict between attributes on the label and | |
3344 | prefix attributes on the declaration. ??? The syntax follows the | |
3345 | old parser in requiring something after label declarations. | |
3346 | Although they are erroneous if the labels declared aren't defined, | |
953ff289 DN |
3347 | is it useful for the syntax to be this way? |
3348 | ||
3349 | OpenMP: | |
3350 | ||
3351 | block-item: | |
3352 | openmp-directive | |
3353 | ||
3354 | openmp-directive: | |
3355 | barrier-directive | |
3356 | flush-directive */ | |
27bf414c JM |
3357 | |
3358 | static tree | |
3359 | c_parser_compound_statement (c_parser *parser) | |
3360 | { | |
3361 | tree stmt; | |
c2255bc4 AH |
3362 | location_t brace_loc; |
3363 | brace_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 3364 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
5600f233 JM |
3365 | { |
3366 | /* Ensure a scope is entered and left anyway to avoid confusion | |
3367 | if we have just prepared to enter a function body. */ | |
3368 | stmt = c_begin_compound_stmt (true); | |
c2255bc4 | 3369 | c_end_compound_stmt (brace_loc, stmt, true); |
5600f233 JM |
3370 | return error_mark_node; |
3371 | } | |
27bf414c JM |
3372 | stmt = c_begin_compound_stmt (true); |
3373 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 3374 | return c_end_compound_stmt (brace_loc, stmt, true); |
27bf414c JM |
3375 | } |
3376 | ||
3377 | /* Parse a compound statement except for the opening brace. This is | |
3378 | used for parsing both compound statements and statement expressions | |
3379 | (which follow different paths to handling the opening). */ | |
3380 | ||
3381 | static void | |
3382 | c_parser_compound_statement_nostart (c_parser *parser) | |
3383 | { | |
3384 | bool last_stmt = false; | |
3385 | bool last_label = false; | |
6ec637a4 | 3386 | bool save_valid_for_pragma = valid_location_for_stdc_pragma_p (); |
3ba09659 | 3387 | location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3388 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) |
3389 | { | |
3390 | c_parser_consume_token (parser); | |
3391 | return; | |
3392 | } | |
6ec637a4 | 3393 | mark_valid_location_for_stdc_pragma (true); |
27bf414c JM |
3394 | if (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
3395 | { | |
3396 | /* Read zero or more forward-declarations for labels that nested | |
3397 | functions can jump to. */ | |
6ec637a4 | 3398 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3399 | while (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
3400 | { | |
c2255bc4 | 3401 | label_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3402 | c_parser_consume_token (parser); |
3403 | /* Any identifiers, including those declared as type names, | |
3404 | are OK here. */ | |
3405 | while (true) | |
3406 | { | |
3407 | tree label; | |
3408 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
3409 | { | |
3410 | c_parser_error (parser, "expected identifier"); | |
3411 | break; | |
3412 | } | |
3413 | label | |
3414 | = declare_label (c_parser_peek_token (parser)->value); | |
3415 | C_DECLARED_LABEL_FLAG (label) = 1; | |
c2255bc4 | 3416 | add_stmt (build_stmt (label_loc, DECL_EXPR, label)); |
27bf414c JM |
3417 | c_parser_consume_token (parser); |
3418 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3419 | c_parser_consume_token (parser); | |
3420 | else | |
3421 | break; | |
3422 | } | |
3423 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
3424 | } | |
c2255bc4 | 3425 | pedwarn (label_loc, OPT_pedantic, "ISO C forbids label declarations"); |
27bf414c JM |
3426 | } |
3427 | /* We must now have at least one statement, label or declaration. */ | |
3428 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3429 | { | |
6ec637a4 | 3430 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
27bf414c JM |
3431 | c_parser_error (parser, "expected declaration or statement"); |
3432 | c_parser_consume_token (parser); | |
3433 | return; | |
3434 | } | |
3435 | while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3436 | { | |
3437 | location_t loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3438 | if (c_parser_next_token_is_keyword (parser, RID_CASE) |
3439 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3440 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3441 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3442 | { | |
c7412148 TT |
3443 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) |
3444 | label_loc = c_parser_peek_2nd_token (parser)->location; | |
3445 | else | |
3446 | label_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3447 | last_label = true; |
3448 | last_stmt = false; | |
6ec637a4 | 3449 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3450 | c_parser_label (parser); |
3451 | } | |
3452 | else if (!last_label | |
3453 | && c_parser_next_token_starts_declspecs (parser)) | |
3454 | { | |
3455 | last_label = false; | |
6ec637a4 | 3456 | mark_valid_location_for_stdc_pragma (false); |
27bf414c | 3457 | c_parser_declaration_or_fndef (parser, true, true, true, true); |
fcf73884 | 3458 | if (last_stmt) |
509c9d60 MLI |
3459 | pedwarn_c90 (loc, |
3460 | (pedantic && !flag_isoc99) | |
fcf73884 MLI |
3461 | ? OPT_pedantic |
3462 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3463 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3464 | last_stmt = false; |
3465 | } | |
3466 | else if (!last_label | |
3467 | && c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
3468 | { | |
3469 | /* __extension__ can start a declaration, but is also an | |
3470 | unary operator that can start an expression. Consume all | |
3471 | but the last of a possible series of __extension__ to | |
3472 | determine which. */ | |
3473 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
3474 | && (c_parser_peek_2nd_token (parser)->keyword | |
3475 | == RID_EXTENSION)) | |
3476 | c_parser_consume_token (parser); | |
3477 | if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser))) | |
3478 | { | |
3479 | int ext; | |
3480 | ext = disable_extension_diagnostics (); | |
3481 | c_parser_consume_token (parser); | |
3482 | last_label = false; | |
6ec637a4 | 3483 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3484 | c_parser_declaration_or_fndef (parser, true, true, true, true); |
3485 | /* Following the old parser, __extension__ does not | |
3486 | disable this diagnostic. */ | |
3487 | restore_extension_diagnostics (ext); | |
fcf73884 | 3488 | if (last_stmt) |
509c9d60 | 3489 | pedwarn_c90 (loc, (pedantic && !flag_isoc99) |
fcf73884 MLI |
3490 | ? OPT_pedantic |
3491 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3492 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3493 | last_stmt = false; |
3494 | } | |
3495 | else | |
3496 | goto statement; | |
3497 | } | |
bc4071dd RH |
3498 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
3499 | { | |
3500 | /* External pragmas, and some omp pragmas, are not associated | |
3501 | with regular c code, and so are not to be considered statements | |
3502 | syntactically. This ensures that the user doesn't put them | |
3503 | places that would turn into syntax errors if the directive | |
3504 | were ignored. */ | |
3505 | if (c_parser_pragma (parser, pragma_compound)) | |
3506 | last_label = false, last_stmt = true; | |
3507 | } | |
3508 | else if (c_parser_next_token_is (parser, CPP_EOF)) | |
3509 | { | |
6ec637a4 | 3510 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
bc4071dd RH |
3511 | c_parser_error (parser, "expected declaration or statement"); |
3512 | return; | |
3513 | } | |
b4b56033 MLI |
3514 | else if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3515 | { | |
3516 | if (parser->in_if_block) | |
3517 | { | |
6ec637a4 | 3518 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
3ba09659 | 3519 | error_at (loc, """expected %<}%> before %<else%>"); |
b4b56033 MLI |
3520 | return; |
3521 | } | |
3522 | else | |
3523 | { | |
3ba09659 | 3524 | error_at (loc, "%<else%> without a previous %<if%>"); |
b4b56033 MLI |
3525 | c_parser_consume_token (parser); |
3526 | continue; | |
3527 | } | |
3528 | } | |
27bf414c JM |
3529 | else |
3530 | { | |
3531 | statement: | |
3532 | last_label = false; | |
3533 | last_stmt = true; | |
6ec637a4 | 3534 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
3535 | c_parser_statement_after_labels (parser); |
3536 | } | |
2c14ae9a VR |
3537 | |
3538 | parser->error = false; | |
27bf414c JM |
3539 | } |
3540 | if (last_label) | |
3ba09659 | 3541 | error_at (label_loc, "label at end of compound statement"); |
27bf414c | 3542 | c_parser_consume_token (parser); |
6ec637a4 JJ |
3543 | /* Restore the value we started with. */ |
3544 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); | |
27bf414c JM |
3545 | } |
3546 | ||
3547 | /* Parse a label (C90 6.6.1, C99 6.8.1). | |
3548 | ||
3549 | label: | |
3550 | identifier : attributes[opt] | |
3551 | case constant-expression : | |
3552 | default : | |
3553 | ||
3554 | GNU extensions: | |
3555 | ||
3556 | label: | |
3557 | case constant-expression ... constant-expression : | |
3558 | ||
3559 | The use of attributes on labels is a GNU extension. The syntax in | |
3560 | GNU C accepts any expressions without commas, non-constant | |
3561 | expressions being rejected later. */ | |
3562 | ||
3563 | static void | |
3564 | c_parser_label (c_parser *parser) | |
3565 | { | |
3566 | location_t loc1 = c_parser_peek_token (parser)->location; | |
3567 | tree label = NULL_TREE; | |
3568 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) | |
3569 | { | |
3570 | tree exp1, exp2; | |
3571 | c_parser_consume_token (parser); | |
3572 | exp1 = c_parser_expr_no_commas (parser, NULL).value; | |
3573 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
3574 | { | |
3575 | c_parser_consume_token (parser); | |
c2255bc4 | 3576 | label = do_case (loc1, exp1, NULL_TREE); |
27bf414c JM |
3577 | } |
3578 | else if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3579 | { | |
3580 | c_parser_consume_token (parser); | |
3581 | exp2 = c_parser_expr_no_commas (parser, NULL).value; | |
3582 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 3583 | label = do_case (loc1, exp1, exp2); |
27bf414c JM |
3584 | } |
3585 | else | |
3586 | c_parser_error (parser, "expected %<:%> or %<...%>"); | |
3587 | } | |
3588 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
3589 | { | |
3590 | c_parser_consume_token (parser); | |
3591 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 3592 | label = do_case (loc1, NULL_TREE, NULL_TREE); |
27bf414c JM |
3593 | } |
3594 | else | |
3595 | { | |
3596 | tree name = c_parser_peek_token (parser)->value; | |
3597 | tree tlab; | |
27bf414c | 3598 | tree attrs; |
c7412148 | 3599 | location_t loc2 = c_parser_peek_token (parser)->location; |
27bf414c JM |
3600 | gcc_assert (c_parser_next_token_is (parser, CPP_NAME)); |
3601 | c_parser_consume_token (parser); | |
3602 | gcc_assert (c_parser_next_token_is (parser, CPP_COLON)); | |
27bf414c JM |
3603 | c_parser_consume_token (parser); |
3604 | attrs = c_parser_attributes (parser); | |
3605 | tlab = define_label (loc2, name); | |
3606 | if (tlab) | |
3607 | { | |
3608 | decl_attributes (&tlab, attrs, 0); | |
c2255bc4 | 3609 | label = add_stmt (build_stmt (loc1, LABEL_EXPR, tlab)); |
27bf414c JM |
3610 | } |
3611 | } | |
3612 | if (label) | |
3d57f0f0 | 3613 | { |
3d57f0f0 MLI |
3614 | if (c_parser_next_token_starts_declspecs (parser) |
3615 | && !(c_parser_next_token_is (parser, CPP_NAME) | |
3616 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3617 | { | |
3ba09659 AH |
3618 | error_at (c_parser_peek_token (parser)->location, |
3619 | "a label can only be part of a statement and " | |
3620 | "a declaration is not a statement"); | |
3d57f0f0 MLI |
3621 | c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false, |
3622 | /*nested*/ true, /*empty_ok*/ false, | |
3623 | /*start_attr_ok*/ true); | |
3624 | } | |
3625 | } | |
27bf414c JM |
3626 | } |
3627 | ||
3628 | /* Parse a statement (C90 6.6, C99 6.8). | |
3629 | ||
3630 | statement: | |
3631 | labeled-statement | |
3632 | compound-statement | |
3633 | expression-statement | |
3634 | selection-statement | |
3635 | iteration-statement | |
3636 | jump-statement | |
3637 | ||
3638 | labeled-statement: | |
3639 | label statement | |
3640 | ||
3641 | expression-statement: | |
3642 | expression[opt] ; | |
3643 | ||
3644 | selection-statement: | |
3645 | if-statement | |
3646 | switch-statement | |
3647 | ||
3648 | iteration-statement: | |
3649 | while-statement | |
3650 | do-statement | |
3651 | for-statement | |
3652 | ||
3653 | jump-statement: | |
3654 | goto identifier ; | |
3655 | continue ; | |
3656 | break ; | |
3657 | return expression[opt] ; | |
3658 | ||
3659 | GNU extensions: | |
3660 | ||
3661 | statement: | |
3662 | asm-statement | |
3663 | ||
3664 | jump-statement: | |
3665 | goto * expression ; | |
3666 | ||
3667 | Objective-C: | |
3668 | ||
3669 | statement: | |
3670 | objc-throw-statement | |
3671 | objc-try-catch-statement | |
3672 | objc-synchronized-statement | |
3673 | ||
3674 | objc-throw-statement: | |
3675 | @throw expression ; | |
3676 | @throw ; | |
953ff289 DN |
3677 | |
3678 | OpenMP: | |
3679 | ||
3680 | statement: | |
3681 | openmp-construct | |
3682 | ||
3683 | openmp-construct: | |
3684 | parallel-construct | |
3685 | for-construct | |
3686 | sections-construct | |
3687 | single-construct | |
3688 | parallel-for-construct | |
3689 | parallel-sections-construct | |
3690 | master-construct | |
3691 | critical-construct | |
3692 | atomic-construct | |
3693 | ordered-construct | |
3694 | ||
3695 | parallel-construct: | |
3696 | parallel-directive structured-block | |
3697 | ||
3698 | for-construct: | |
3699 | for-directive iteration-statement | |
3700 | ||
3701 | sections-construct: | |
3702 | sections-directive section-scope | |
3703 | ||
3704 | single-construct: | |
3705 | single-directive structured-block | |
3706 | ||
3707 | parallel-for-construct: | |
3708 | parallel-for-directive iteration-statement | |
3709 | ||
3710 | parallel-sections-construct: | |
3711 | parallel-sections-directive section-scope | |
3712 | ||
3713 | master-construct: | |
3714 | master-directive structured-block | |
3715 | ||
3716 | critical-construct: | |
3717 | critical-directive structured-block | |
3718 | ||
3719 | atomic-construct: | |
3720 | atomic-directive expression-statement | |
3721 | ||
3722 | ordered-construct: | |
3723 | ordered-directive structured-block */ | |
27bf414c JM |
3724 | |
3725 | static void | |
3726 | c_parser_statement (c_parser *parser) | |
3727 | { | |
3728 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3729 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3730 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3731 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3732 | c_parser_label (parser); | |
3733 | c_parser_statement_after_labels (parser); | |
3734 | } | |
3735 | ||
3736 | /* Parse a statement, other than a labeled statement. */ | |
3737 | ||
3738 | static void | |
3739 | c_parser_statement_after_labels (c_parser *parser) | |
3740 | { | |
3741 | location_t loc = c_parser_peek_token (parser)->location; | |
3742 | tree stmt = NULL_TREE; | |
b4b56033 MLI |
3743 | bool in_if_block = parser->in_if_block; |
3744 | parser->in_if_block = false; | |
27bf414c JM |
3745 | switch (c_parser_peek_token (parser)->type) |
3746 | { | |
3747 | case CPP_OPEN_BRACE: | |
3748 | add_stmt (c_parser_compound_statement (parser)); | |
3749 | break; | |
3750 | case CPP_KEYWORD: | |
3751 | switch (c_parser_peek_token (parser)->keyword) | |
3752 | { | |
3753 | case RID_IF: | |
3754 | c_parser_if_statement (parser); | |
3755 | break; | |
3756 | case RID_SWITCH: | |
3757 | c_parser_switch_statement (parser); | |
3758 | break; | |
3759 | case RID_WHILE: | |
3760 | c_parser_while_statement (parser); | |
3761 | break; | |
3762 | case RID_DO: | |
3763 | c_parser_do_statement (parser); | |
3764 | break; | |
3765 | case RID_FOR: | |
3766 | c_parser_for_statement (parser); | |
3767 | break; | |
3768 | case RID_GOTO: | |
3769 | c_parser_consume_token (parser); | |
3770 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3771 | { | |
c2255bc4 AH |
3772 | stmt = c_finish_goto_label (loc, |
3773 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
3774 | c_parser_consume_token (parser); |
3775 | } | |
3776 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
3777 | { | |
3778 | c_parser_consume_token (parser); | |
c2255bc4 AH |
3779 | stmt = c_finish_goto_ptr (loc, |
3780 | c_parser_expression (parser).value); | |
27bf414c JM |
3781 | } |
3782 | else | |
3783 | c_parser_error (parser, "expected identifier or %<*%>"); | |
3784 | goto expect_semicolon; | |
3785 | case RID_CONTINUE: | |
3786 | c_parser_consume_token (parser); | |
c2255bc4 | 3787 | stmt = c_finish_bc_stmt (loc, &c_cont_label, false); |
27bf414c JM |
3788 | goto expect_semicolon; |
3789 | case RID_BREAK: | |
3790 | c_parser_consume_token (parser); | |
c2255bc4 | 3791 | stmt = c_finish_bc_stmt (loc, &c_break_label, true); |
27bf414c JM |
3792 | goto expect_semicolon; |
3793 | case RID_RETURN: | |
3794 | c_parser_consume_token (parser); | |
3795 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3796 | { | |
c2255bc4 | 3797 | stmt = c_finish_return (loc, NULL_TREE, NULL_TREE); |
27bf414c JM |
3798 | c_parser_consume_token (parser); |
3799 | } | |
3800 | else | |
3801 | { | |
bbbbb16a | 3802 | struct c_expr expr = c_parser_expression_conv (parser); |
c2255bc4 | 3803 | stmt = c_finish_return (loc, expr.value, expr.original_type); |
27bf414c JM |
3804 | goto expect_semicolon; |
3805 | } | |
3806 | break; | |
3807 | case RID_ASM: | |
3808 | stmt = c_parser_asm_statement (parser); | |
3809 | break; | |
eea1139b | 3810 | case RID_THROW: |
27bf414c JM |
3811 | gcc_assert (c_dialect_objc ()); |
3812 | c_parser_consume_token (parser); | |
3813 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3814 | { | |
c2255bc4 | 3815 | stmt = objc_build_throw_stmt (loc, NULL_TREE); |
27bf414c JM |
3816 | c_parser_consume_token (parser); |
3817 | } | |
3818 | else | |
3819 | { | |
928c19bb JM |
3820 | tree expr = c_parser_expression (parser).value; |
3821 | expr = c_fully_fold (expr, false, NULL); | |
c2255bc4 | 3822 | stmt = objc_build_throw_stmt (loc, expr); |
27bf414c JM |
3823 | goto expect_semicolon; |
3824 | } | |
3825 | break; | |
eea1139b | 3826 | case RID_TRY: |
27bf414c JM |
3827 | gcc_assert (c_dialect_objc ()); |
3828 | c_parser_objc_try_catch_statement (parser); | |
3829 | break; | |
3830 | case RID_AT_SYNCHRONIZED: | |
3831 | gcc_assert (c_dialect_objc ()); | |
3832 | c_parser_objc_synchronized_statement (parser); | |
3833 | break; | |
3834 | default: | |
3835 | goto expr_stmt; | |
3836 | } | |
3837 | break; | |
3838 | case CPP_SEMICOLON: | |
3839 | c_parser_consume_token (parser); | |
3840 | break; | |
3841 | case CPP_CLOSE_PAREN: | |
3842 | case CPP_CLOSE_SQUARE: | |
3843 | /* Avoid infinite loop in error recovery: | |
3844 | c_parser_skip_until_found stops at a closing nesting | |
3845 | delimiter without consuming it, but here we need to consume | |
3846 | it to proceed further. */ | |
3847 | c_parser_error (parser, "expected statement"); | |
3848 | c_parser_consume_token (parser); | |
3849 | break; | |
bc4071dd RH |
3850 | case CPP_PRAGMA: |
3851 | c_parser_pragma (parser, pragma_stmt); | |
3852 | break; | |
27bf414c JM |
3853 | default: |
3854 | expr_stmt: | |
c2255bc4 | 3855 | stmt = c_finish_expr_stmt (loc, c_parser_expression_conv (parser).value); |
27bf414c JM |
3856 | expect_semicolon: |
3857 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
3858 | break; | |
3859 | } | |
3860 | /* Two cases cannot and do not have line numbers associated: If stmt | |
3861 | is degenerate, such as "2;", then stmt is an INTEGER_CST, which | |
3862 | cannot hold line numbers. But that's OK because the statement | |
3863 | will either be changed to a MODIFY_EXPR during gimplification of | |
3864 | the statement expr, or discarded. If stmt was compound, but | |
3865 | without new variables, we will have skipped the creation of a | |
3866 | BIND and will have a bare STATEMENT_LIST. But that's OK because | |
3867 | (recursively) all of the component statements should already have | |
3868 | line numbers assigned. ??? Can we discard no-op statements | |
3869 | earlier? */ | |
c2255bc4 AH |
3870 | if (CAN_HAVE_LOCATION_P (stmt) |
3871 | && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION) | |
3872 | SET_EXPR_LOCATION (stmt, loc); | |
b4b56033 MLI |
3873 | |
3874 | parser->in_if_block = in_if_block; | |
27bf414c JM |
3875 | } |
3876 | ||
ca085fd7 MLI |
3877 | /* Parse the condition from an if, do, while or for statements. */ |
3878 | ||
3879 | static tree | |
3880 | c_parser_condition (c_parser *parser) | |
3881 | { | |
c2255bc4 | 3882 | location_t loc = c_parser_peek_token (parser)->location; |
ca085fd7 | 3883 | tree cond; |
928c19bb JM |
3884 | cond = c_parser_expression_conv (parser).value; |
3885 | cond = c_objc_common_truthvalue_conversion (loc, cond); | |
3886 | cond = c_fully_fold (cond, false, NULL); | |
ca085fd7 MLI |
3887 | if (warn_sequence_point) |
3888 | verify_sequence_points (cond); | |
3889 | return cond; | |
3890 | } | |
3891 | ||
27bf414c JM |
3892 | /* Parse a parenthesized condition from an if, do or while statement. |
3893 | ||
3894 | condition: | |
3895 | ( expression ) | |
3896 | */ | |
3897 | static tree | |
3898 | c_parser_paren_condition (c_parser *parser) | |
3899 | { | |
27bf414c JM |
3900 | tree cond; |
3901 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3902 | return error_mark_node; | |
ca085fd7 | 3903 | cond = c_parser_condition (parser); |
27bf414c JM |
3904 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
3905 | return cond; | |
3906 | } | |
3907 | ||
3908 | /* Parse a statement which is a block in C99. */ | |
3909 | ||
3910 | static tree | |
3911 | c_parser_c99_block_statement (c_parser *parser) | |
3912 | { | |
3913 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 3914 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c | 3915 | c_parser_statement (parser); |
c2255bc4 | 3916 | return c_end_compound_stmt (loc, block, flag_isoc99); |
27bf414c JM |
3917 | } |
3918 | ||
b4b56033 MLI |
3919 | /* Parse the body of an if statement. This is just parsing a |
3920 | statement but (a) it is a block in C99, (b) we track whether the | |
3921 | body is an if statement for the sake of -Wparentheses warnings, (c) | |
3922 | we handle an empty body specially for the sake of -Wempty-body | |
3923 | warnings, and (d) we call parser_compound_statement directly | |
3924 | because c_parser_statement_after_labels resets | |
3925 | parser->in_if_block. */ | |
27bf414c JM |
3926 | |
3927 | static tree | |
3928 | c_parser_if_body (c_parser *parser, bool *if_p) | |
3929 | { | |
3930 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 3931 | location_t body_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3932 | while (c_parser_next_token_is_keyword (parser, RID_CASE) |
3933 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3934 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3935 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3936 | c_parser_label (parser); | |
3937 | *if_p = c_parser_next_token_is_keyword (parser, RID_IF); | |
62e00e94 | 3938 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
b4b56033 | 3939 | { |
626c34b5 | 3940 | location_t loc = c_parser_peek_token (parser)->location; |
c2255bc4 | 3941 | add_stmt (build_empty_stmt (loc)); |
b4b56033 | 3942 | c_parser_consume_token (parser); |
626c34b5 PB |
3943 | if (!c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3944 | warning_at (loc, OPT_Wempty_body, | |
3945 | "suggest braces around empty body in an %<if%> statement"); | |
b4b56033 MLI |
3946 | } |
3947 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3948 | add_stmt (c_parser_compound_statement (parser)); | |
3949 | else | |
3950 | c_parser_statement_after_labels (parser); | |
c2255bc4 | 3951 | return c_end_compound_stmt (body_loc, block, flag_isoc99); |
b4b56033 MLI |
3952 | } |
3953 | ||
3954 | /* Parse the else body of an if statement. This is just parsing a | |
3955 | statement but (a) it is a block in C99, (b) we handle an empty body | |
3956 | specially for the sake of -Wempty-body warnings. */ | |
3957 | ||
3958 | static tree | |
3959 | c_parser_else_body (c_parser *parser) | |
3960 | { | |
c2255bc4 | 3961 | location_t else_loc = c_parser_peek_token (parser)->location; |
b4b56033 MLI |
3962 | tree block = c_begin_compound_stmt (flag_isoc99); |
3963 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3964 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3965 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3966 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3967 | c_parser_label (parser); | |
3968 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3969 | { | |
c2255bc4 AH |
3970 | location_t loc = c_parser_peek_token (parser)->location; |
3971 | warning_at (loc, | |
626c34b5 PB |
3972 | OPT_Wempty_body, |
3973 | "suggest braces around empty body in an %<else%> statement"); | |
c2255bc4 | 3974 | add_stmt (build_empty_stmt (loc)); |
b4b56033 MLI |
3975 | c_parser_consume_token (parser); |
3976 | } | |
3977 | else | |
3978 | c_parser_statement_after_labels (parser); | |
c2255bc4 | 3979 | return c_end_compound_stmt (else_loc, block, flag_isoc99); |
27bf414c JM |
3980 | } |
3981 | ||
3982 | /* Parse an if statement (C90 6.6.4, C99 6.8.4). | |
3983 | ||
3984 | if-statement: | |
3985 | if ( expression ) statement | |
3986 | if ( expression ) statement else statement | |
3987 | */ | |
3988 | ||
3989 | static void | |
3990 | c_parser_if_statement (c_parser *parser) | |
3991 | { | |
3992 | tree block; | |
3993 | location_t loc; | |
3994 | tree cond; | |
b4b56033 | 3995 | bool first_if = false; |
27bf414c | 3996 | tree first_body, second_body; |
b4b56033 MLI |
3997 | bool in_if_block; |
3998 | ||
27bf414c JM |
3999 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF)); |
4000 | c_parser_consume_token (parser); | |
4001 | block = c_begin_compound_stmt (flag_isoc99); | |
4002 | loc = c_parser_peek_token (parser)->location; | |
4003 | cond = c_parser_paren_condition (parser); | |
b4b56033 MLI |
4004 | in_if_block = parser->in_if_block; |
4005 | parser->in_if_block = true; | |
27bf414c | 4006 | first_body = c_parser_if_body (parser, &first_if); |
b4b56033 | 4007 | parser->in_if_block = in_if_block; |
27bf414c JM |
4008 | if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4009 | { | |
4010 | c_parser_consume_token (parser); | |
b4b56033 | 4011 | second_body = c_parser_else_body (parser); |
27bf414c JM |
4012 | } |
4013 | else | |
4014 | second_body = NULL_TREE; | |
4015 | c_finish_if_stmt (loc, cond, first_body, second_body, first_if); | |
c2255bc4 | 4016 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4017 | } |
4018 | ||
4019 | /* Parse a switch statement (C90 6.6.4, C99 6.8.4). | |
4020 | ||
4021 | switch-statement: | |
4022 | switch (expression) statement | |
4023 | */ | |
4024 | ||
4025 | static void | |
4026 | c_parser_switch_statement (c_parser *parser) | |
4027 | { | |
4028 | tree block, expr, body, save_break; | |
c2255bc4 AH |
4029 | location_t switch_loc = c_parser_peek_token (parser)->location; |
4030 | location_t switch_cond_loc; | |
27bf414c JM |
4031 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH)); |
4032 | c_parser_consume_token (parser); | |
4033 | block = c_begin_compound_stmt (flag_isoc99); | |
4034 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4035 | { | |
c2255bc4 | 4036 | switch_cond_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4037 | expr = c_parser_expression (parser).value; |
4038 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4039 | } | |
4040 | else | |
c2255bc4 AH |
4041 | { |
4042 | switch_cond_loc = UNKNOWN_LOCATION; | |
4043 | expr = error_mark_node; | |
4044 | } | |
4045 | c_start_case (switch_loc, switch_cond_loc, expr); | |
27bf414c JM |
4046 | save_break = c_break_label; |
4047 | c_break_label = NULL_TREE; | |
4048 | body = c_parser_c99_block_statement (parser); | |
4049 | c_finish_case (body); | |
4050 | if (c_break_label) | |
c2255bc4 AH |
4051 | { |
4052 | location_t here = c_parser_peek_token (parser)->location; | |
4053 | tree t = build1 (LABEL_EXPR, void_type_node, c_break_label); | |
4054 | SET_EXPR_LOCATION (t, here); | |
4055 | add_stmt (t); | |
4056 | } | |
27bf414c | 4057 | c_break_label = save_break; |
c2255bc4 | 4058 | add_stmt (c_end_compound_stmt (switch_loc, block, flag_isoc99)); |
27bf414c JM |
4059 | } |
4060 | ||
4061 | /* Parse a while statement (C90 6.6.5, C99 6.8.5). | |
4062 | ||
4063 | while-statement: | |
4064 | while (expression) statement | |
4065 | */ | |
4066 | ||
4067 | static void | |
4068 | c_parser_while_statement (c_parser *parser) | |
4069 | { | |
4070 | tree block, cond, body, save_break, save_cont; | |
4071 | location_t loc; | |
4072 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE)); | |
4073 | c_parser_consume_token (parser); | |
4074 | block = c_begin_compound_stmt (flag_isoc99); | |
4075 | loc = c_parser_peek_token (parser)->location; | |
4076 | cond = c_parser_paren_condition (parser); | |
4077 | save_break = c_break_label; | |
4078 | c_break_label = NULL_TREE; | |
4079 | save_cont = c_cont_label; | |
4080 | c_cont_label = NULL_TREE; | |
4081 | body = c_parser_c99_block_statement (parser); | |
4082 | c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true); | |
c2255bc4 | 4083 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4084 | c_break_label = save_break; |
4085 | c_cont_label = save_cont; | |
4086 | } | |
4087 | ||
4088 | /* Parse a do statement (C90 6.6.5, C99 6.8.5). | |
4089 | ||
4090 | do-statement: | |
4091 | do statement while ( expression ) ; | |
4092 | */ | |
4093 | ||
4094 | static void | |
4095 | c_parser_do_statement (c_parser *parser) | |
4096 | { | |
4097 | tree block, cond, body, save_break, save_cont, new_break, new_cont; | |
4098 | location_t loc; | |
4099 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO)); | |
4100 | c_parser_consume_token (parser); | |
62e00e94 | 4101 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3ba09659 AH |
4102 | warning_at (c_parser_peek_token (parser)->location, |
4103 | OPT_Wempty_body, | |
4104 | "suggest braces around empty body in %<do%> statement"); | |
27bf414c JM |
4105 | block = c_begin_compound_stmt (flag_isoc99); |
4106 | loc = c_parser_peek_token (parser)->location; | |
4107 | save_break = c_break_label; | |
4108 | c_break_label = NULL_TREE; | |
4109 | save_cont = c_cont_label; | |
4110 | c_cont_label = NULL_TREE; | |
4111 | body = c_parser_c99_block_statement (parser); | |
4112 | c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>"); | |
4113 | new_break = c_break_label; | |
4114 | c_break_label = save_break; | |
4115 | new_cont = c_cont_label; | |
4116 | c_cont_label = save_cont; | |
4117 | cond = c_parser_paren_condition (parser); | |
4118 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4119 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4120 | c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false); | |
c2255bc4 | 4121 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4122 | } |
4123 | ||
4124 | /* Parse a for statement (C90 6.6.5, C99 6.8.5). | |
4125 | ||
4126 | for-statement: | |
4127 | for ( expression[opt] ; expression[opt] ; expression[opt] ) statement | |
4128 | for ( nested-declaration expression[opt] ; expression[opt] ) statement | |
4129 | ||
4130 | The form with a declaration is new in C99. | |
4131 | ||
4132 | ??? In accordance with the old parser, the declaration may be a | |
4133 | nested function, which is then rejected in check_for_loop_decls, | |
4134 | but does it make any sense for this to be included in the grammar? | |
4135 | Note in particular that the nested function does not include a | |
4136 | trailing ';', whereas the "declaration" production includes one. | |
4137 | Also, can we reject bad declarations earlier and cheaper than | |
4138 | check_for_loop_decls? */ | |
4139 | ||
4140 | static void | |
4141 | c_parser_for_statement (c_parser *parser) | |
4142 | { | |
4143 | tree block, cond, incr, save_break, save_cont, body; | |
c2255bc4 AH |
4144 | location_t loc = c_parser_peek_token (parser)->location; |
4145 | location_t for_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4146 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR)); |
4147 | c_parser_consume_token (parser); | |
4148 | block = c_begin_compound_stmt (flag_isoc99); | |
4149 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4150 | { | |
4151 | /* Parse the initialization declaration or expression. */ | |
4152 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4153 | { | |
4154 | c_parser_consume_token (parser); | |
c2255bc4 | 4155 | c_finish_expr_stmt (loc, NULL_TREE); |
27bf414c JM |
4156 | } |
4157 | else if (c_parser_next_token_starts_declspecs (parser)) | |
4158 | { | |
4159 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
c2255bc4 | 4160 | check_for_loop_decls (for_loc); |
27bf414c JM |
4161 | } |
4162 | else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4163 | { | |
4164 | /* __extension__ can start a declaration, but is also an | |
4165 | unary operator that can start an expression. Consume all | |
4166 | but the last of a possible series of __extension__ to | |
4167 | determine which. */ | |
4168 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4169 | && (c_parser_peek_2nd_token (parser)->keyword | |
4170 | == RID_EXTENSION)) | |
4171 | c_parser_consume_token (parser); | |
4172 | if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser))) | |
4173 | { | |
4174 | int ext; | |
4175 | ext = disable_extension_diagnostics (); | |
4176 | c_parser_consume_token (parser); | |
4177 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
4178 | restore_extension_diagnostics (ext); | |
c2255bc4 | 4179 | check_for_loop_decls (for_loc); |
27bf414c JM |
4180 | } |
4181 | else | |
4182 | goto init_expr; | |
4183 | } | |
4184 | else | |
4185 | { | |
4186 | init_expr: | |
c2255bc4 | 4187 | c_finish_expr_stmt (loc, c_parser_expression (parser).value); |
27bf414c JM |
4188 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
4189 | } | |
4190 | /* Parse the loop condition. */ | |
27bf414c JM |
4191 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4192 | { | |
4193 | c_parser_consume_token (parser); | |
4194 | cond = NULL_TREE; | |
4195 | } | |
4196 | else | |
4197 | { | |
ca085fd7 | 4198 | cond = c_parser_condition (parser); |
27bf414c JM |
4199 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
4200 | } | |
4201 | /* Parse the increment expression. */ | |
4202 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
c2255bc4 | 4203 | incr = c_process_expr_stmt (loc, NULL_TREE); |
27bf414c | 4204 | else |
c2255bc4 | 4205 | incr = c_process_expr_stmt (loc, c_parser_expression (parser).value); |
27bf414c JM |
4206 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4207 | } | |
4208 | else | |
4209 | { | |
4210 | cond = error_mark_node; | |
4211 | incr = error_mark_node; | |
4212 | } | |
4213 | save_break = c_break_label; | |
4214 | c_break_label = NULL_TREE; | |
4215 | save_cont = c_cont_label; | |
4216 | c_cont_label = NULL_TREE; | |
4217 | body = c_parser_c99_block_statement (parser); | |
4218 | c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true); | |
c2255bc4 | 4219 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4220 | c_break_label = save_break; |
4221 | c_cont_label = save_cont; | |
4222 | } | |
4223 | ||
4224 | /* Parse an asm statement, a GNU extension. This is a full-blown asm | |
4225 | statement with inputs, outputs, clobbers, and volatile tag | |
4226 | allowed. | |
4227 | ||
4228 | asm-statement: | |
4229 | asm type-qualifier[opt] ( asm-argument ) ; | |
1c384bf1 | 4230 | asm type-qualifier[opt] goto ( asm-goto-argument ) ; |
27bf414c JM |
4231 | |
4232 | asm-argument: | |
4233 | asm-string-literal | |
4234 | asm-string-literal : asm-operands[opt] | |
4235 | asm-string-literal : asm-operands[opt] : asm-operands[opt] | |
1c384bf1 RH |
4236 | asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt] |
4237 | ||
4238 | asm-goto-argument: | |
4239 | asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \ | |
4240 | : asm-goto-operands | |
27bf414c JM |
4241 | |
4242 | Qualifiers other than volatile are accepted in the syntax but | |
4243 | warned for. */ | |
4244 | ||
4245 | static tree | |
4246 | c_parser_asm_statement (c_parser *parser) | |
4247 | { | |
1c384bf1 RH |
4248 | tree quals, str, outputs, inputs, clobbers, labels, ret; |
4249 | bool simple, is_goto; | |
c2255bc4 | 4250 | location_t asm_loc = c_parser_peek_token (parser)->location; |
1c384bf1 RH |
4251 | int section, nsections; |
4252 | ||
27bf414c JM |
4253 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); |
4254 | c_parser_consume_token (parser); | |
4255 | if (c_parser_next_token_is_keyword (parser, RID_VOLATILE)) | |
4256 | { | |
4257 | quals = c_parser_peek_token (parser)->value; | |
4258 | c_parser_consume_token (parser); | |
4259 | } | |
4260 | else if (c_parser_next_token_is_keyword (parser, RID_CONST) | |
4261 | || c_parser_next_token_is_keyword (parser, RID_RESTRICT)) | |
4262 | { | |
3ba09659 AH |
4263 | warning_at (c_parser_peek_token (parser)->location, |
4264 | 0, | |
4265 | "%E qualifier ignored on asm", | |
4266 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
4267 | quals = NULL_TREE; |
4268 | c_parser_consume_token (parser); | |
4269 | } | |
4270 | else | |
4271 | quals = NULL_TREE; | |
1c384bf1 RH |
4272 | |
4273 | is_goto = false; | |
4274 | if (c_parser_next_token_is_keyword (parser, RID_GOTO)) | |
4275 | { | |
4276 | c_parser_consume_token (parser); | |
4277 | is_goto = true; | |
4278 | } | |
4279 | ||
27bf414c | 4280 | /* ??? Follow the C++ parser rather than using the |
46c2514e TT |
4281 | lex_untranslated_string kludge. */ |
4282 | parser->lex_untranslated_string = true; | |
1c384bf1 RH |
4283 | ret = NULL; |
4284 | ||
27bf414c | 4285 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
1c384bf1 RH |
4286 | goto error; |
4287 | ||
27bf414c | 4288 | str = c_parser_asm_string_literal (parser); |
b85eb797 | 4289 | if (str == NULL_TREE) |
1c384bf1 RH |
4290 | goto error_close_paren; |
4291 | ||
4292 | simple = true; | |
4293 | outputs = NULL_TREE; | |
4294 | inputs = NULL_TREE; | |
4295 | clobbers = NULL_TREE; | |
4296 | labels = NULL_TREE; | |
4297 | ||
4298 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
4299 | goto done_asm; | |
4300 | ||
4301 | /* Parse each colon-delimited section of operands. */ | |
4302 | nsections = 3 + is_goto; | |
4303 | for (section = 0; section < nsections; ++section) | |
b85eb797 | 4304 | { |
1c384bf1 RH |
4305 | if (!c_parser_require (parser, CPP_COLON, |
4306 | is_goto | |
4307 | ? "expected %<:%>" | |
4308 | : "expected %<:%> or %<)%>")) | |
4309 | goto error_close_paren; | |
4310 | ||
4311 | /* Once past any colon, we're no longer a simple asm. */ | |
4312 | simple = false; | |
4313 | ||
4314 | if ((!c_parser_next_token_is (parser, CPP_COLON) | |
4315 | && !c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4316 | || section == 3) | |
4317 | switch (section) | |
4318 | { | |
4319 | case 0: | |
4320 | /* For asm goto, we don't allow output operands, but reserve | |
4321 | the slot for a future extension that does allow them. */ | |
4322 | if (!is_goto) | |
4323 | outputs = c_parser_asm_operands (parser, false); | |
4324 | break; | |
4325 | case 1: | |
4326 | inputs = c_parser_asm_operands (parser, true); | |
4327 | break; | |
4328 | case 2: | |
4329 | clobbers = c_parser_asm_clobbers (parser); | |
4330 | break; | |
4331 | case 3: | |
4332 | labels = c_parser_asm_goto_operands (parser); | |
4333 | break; | |
4334 | default: | |
4335 | gcc_unreachable (); | |
4336 | } | |
4337 | ||
4338 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
4339 | goto done_asm; | |
27bf414c | 4340 | } |
1c384bf1 | 4341 | |
27bf414c | 4342 | done_asm: |
27bf414c JM |
4343 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4344 | { | |
4345 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
1c384bf1 | 4346 | goto error; |
27bf414c | 4347 | } |
1c384bf1 | 4348 | |
27bf414c JM |
4349 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) |
4350 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1c384bf1 | 4351 | |
c2255bc4 | 4352 | ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs, |
1c384bf1 RH |
4353 | clobbers, labels, simple)); |
4354 | ||
4355 | error: | |
4356 | parser->lex_untranslated_string = false; | |
27bf414c | 4357 | return ret; |
1c384bf1 RH |
4358 | |
4359 | error_close_paren: | |
4360 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4361 | goto error; | |
27bf414c JM |
4362 | } |
4363 | ||
46bdb9cf JM |
4364 | /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but |
4365 | not outputs), apply the default conversion of functions and arrays | |
4366 | to pointers. | |
27bf414c JM |
4367 | |
4368 | asm-operands: | |
4369 | asm-operand | |
4370 | asm-operands , asm-operand | |
4371 | ||
4372 | asm-operand: | |
4373 | asm-string-literal ( expression ) | |
4374 | [ identifier ] asm-string-literal ( expression ) | |
4375 | */ | |
4376 | ||
4377 | static tree | |
46bdb9cf | 4378 | c_parser_asm_operands (c_parser *parser, bool convert_p) |
27bf414c JM |
4379 | { |
4380 | tree list = NULL_TREE; | |
c2255bc4 | 4381 | location_t loc; |
27bf414c JM |
4382 | while (true) |
4383 | { | |
f2a71bbc JM |
4384 | tree name, str; |
4385 | struct c_expr expr; | |
27bf414c JM |
4386 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) |
4387 | { | |
4388 | c_parser_consume_token (parser); | |
4389 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4390 | { | |
4391 | tree id = c_parser_peek_token (parser)->value; | |
4392 | c_parser_consume_token (parser); | |
4393 | name = build_string (IDENTIFIER_LENGTH (id), | |
4394 | IDENTIFIER_POINTER (id)); | |
4395 | } | |
4396 | else | |
4397 | { | |
4398 | c_parser_error (parser, "expected identifier"); | |
4399 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL); | |
4400 | return NULL_TREE; | |
4401 | } | |
4402 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
4403 | "expected %<]%>"); | |
4404 | } | |
4405 | else | |
4406 | name = NULL_TREE; | |
4407 | str = c_parser_asm_string_literal (parser); | |
4408 | if (str == NULL_TREE) | |
4409 | return NULL_TREE; | |
46c2514e | 4410 | parser->lex_untranslated_string = false; |
27bf414c JM |
4411 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4412 | { | |
46c2514e | 4413 | parser->lex_untranslated_string = true; |
27bf414c JM |
4414 | return NULL_TREE; |
4415 | } | |
c2255bc4 | 4416 | loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 4417 | expr = c_parser_expression (parser); |
46bdb9cf | 4418 | if (convert_p) |
c2255bc4 | 4419 | expr = default_function_array_conversion (loc, expr); |
928c19bb | 4420 | expr.value = c_fully_fold (expr.value, false, NULL); |
46c2514e | 4421 | parser->lex_untranslated_string = true; |
27bf414c JM |
4422 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4423 | { | |
4424 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4425 | return NULL_TREE; | |
4426 | } | |
4427 | list = chainon (list, build_tree_list (build_tree_list (name, str), | |
f2a71bbc | 4428 | expr.value)); |
27bf414c JM |
4429 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
4430 | c_parser_consume_token (parser); | |
4431 | else | |
4432 | break; | |
4433 | } | |
4434 | return list; | |
4435 | } | |
4436 | ||
4437 | /* Parse asm clobbers, a GNU extension. | |
4438 | ||
4439 | asm-clobbers: | |
4440 | asm-string-literal | |
4441 | asm-clobbers , asm-string-literal | |
4442 | */ | |
4443 | ||
4444 | static tree | |
4445 | c_parser_asm_clobbers (c_parser *parser) | |
4446 | { | |
4447 | tree list = NULL_TREE; | |
4448 | while (true) | |
4449 | { | |
4450 | tree str = c_parser_asm_string_literal (parser); | |
4451 | if (str) | |
4452 | list = tree_cons (NULL_TREE, str, list); | |
4453 | else | |
4454 | return NULL_TREE; | |
4455 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4456 | c_parser_consume_token (parser); | |
4457 | else | |
4458 | break; | |
4459 | } | |
4460 | return list; | |
4461 | } | |
4462 | ||
1c384bf1 RH |
4463 | /* Parse asm goto labels, a GNU extension. |
4464 | ||
4465 | asm-goto-operands: | |
4466 | identifier | |
4467 | asm-goto-operands , identifier | |
4468 | */ | |
4469 | ||
4470 | static tree | |
4471 | c_parser_asm_goto_operands (c_parser *parser) | |
4472 | { | |
4473 | tree list = NULL_TREE; | |
4474 | while (true) | |
4475 | { | |
4476 | tree name, label; | |
4477 | ||
4478 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4479 | { | |
4480 | c_token *tok = c_parser_peek_token (parser); | |
4481 | name = tok->value; | |
4482 | label = lookup_label_for_goto (tok->location, name); | |
4483 | c_parser_consume_token (parser); | |
4484 | TREE_USED (label) = 1; | |
4485 | } | |
4486 | else | |
4487 | { | |
4488 | c_parser_error (parser, "expected identifier"); | |
4489 | return NULL_TREE; | |
4490 | } | |
4491 | ||
4492 | name = build_string (IDENTIFIER_LENGTH (name), | |
4493 | IDENTIFIER_POINTER (name)); | |
4494 | list = tree_cons (name, label, list); | |
4495 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4496 | c_parser_consume_token (parser); | |
4497 | else | |
4498 | return nreverse (list); | |
4499 | } | |
4500 | } | |
4501 | ||
27bf414c JM |
4502 | /* Parse an expression other than a compound expression; that is, an |
4503 | assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not | |
4504 | NULL then it is an Objective-C message expression which is the | |
4505 | primary-expression starting the expression as an initializer. | |
4506 | ||
4507 | assignment-expression: | |
4508 | conditional-expression | |
4509 | unary-expression assignment-operator assignment-expression | |
4510 | ||
4511 | assignment-operator: one of | |
4512 | = *= /= %= += -= <<= >>= &= ^= |= | |
4513 | ||
4514 | In GNU C we accept any conditional expression on the LHS and | |
4515 | diagnose the invalid lvalue rather than producing a syntax | |
4516 | error. */ | |
4517 | ||
4518 | static struct c_expr | |
4519 | c_parser_expr_no_commas (c_parser *parser, struct c_expr *after) | |
4520 | { | |
4521 | struct c_expr lhs, rhs, ret; | |
4522 | enum tree_code code; | |
c2255bc4 | 4523 | location_t op_location, exp_location; |
27bf414c JM |
4524 | gcc_assert (!after || c_dialect_objc ()); |
4525 | lhs = c_parser_conditional_expression (parser, after); | |
c9f9eb5d | 4526 | op_location = c_parser_peek_token (parser)->location; |
27bf414c JM |
4527 | switch (c_parser_peek_token (parser)->type) |
4528 | { | |
4529 | case CPP_EQ: | |
4530 | code = NOP_EXPR; | |
4531 | break; | |
4532 | case CPP_MULT_EQ: | |
4533 | code = MULT_EXPR; | |
4534 | break; | |
4535 | case CPP_DIV_EQ: | |
4536 | code = TRUNC_DIV_EXPR; | |
4537 | break; | |
4538 | case CPP_MOD_EQ: | |
4539 | code = TRUNC_MOD_EXPR; | |
4540 | break; | |
4541 | case CPP_PLUS_EQ: | |
4542 | code = PLUS_EXPR; | |
4543 | break; | |
4544 | case CPP_MINUS_EQ: | |
4545 | code = MINUS_EXPR; | |
4546 | break; | |
4547 | case CPP_LSHIFT_EQ: | |
4548 | code = LSHIFT_EXPR; | |
4549 | break; | |
4550 | case CPP_RSHIFT_EQ: | |
4551 | code = RSHIFT_EXPR; | |
4552 | break; | |
4553 | case CPP_AND_EQ: | |
4554 | code = BIT_AND_EXPR; | |
4555 | break; | |
4556 | case CPP_XOR_EQ: | |
4557 | code = BIT_XOR_EXPR; | |
4558 | break; | |
4559 | case CPP_OR_EQ: | |
4560 | code = BIT_IOR_EXPR; | |
4561 | break; | |
4562 | default: | |
4563 | return lhs; | |
4564 | } | |
4565 | c_parser_consume_token (parser); | |
c2255bc4 | 4566 | exp_location = c_parser_peek_token (parser)->location; |
27bf414c | 4567 | rhs = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 | 4568 | rhs = default_function_array_conversion (exp_location, rhs); |
32e8bb8e | 4569 | ret.value = build_modify_expr (op_location, lhs.value, lhs.original_type, |
c2255bc4 AH |
4570 | code, exp_location, rhs.value, |
4571 | rhs.original_type); | |
27bf414c JM |
4572 | if (code == NOP_EXPR) |
4573 | ret.original_code = MODIFY_EXPR; | |
4574 | else | |
4575 | { | |
4576 | TREE_NO_WARNING (ret.value) = 1; | |
4577 | ret.original_code = ERROR_MARK; | |
4578 | } | |
6866c6e8 | 4579 | ret.original_type = NULL; |
27bf414c JM |
4580 | return ret; |
4581 | } | |
4582 | ||
4583 | /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER | |
4584 | is not NULL then it is an Objective-C message expression which is | |
4585 | the primary-expression starting the expression as an initializer. | |
4586 | ||
4587 | conditional-expression: | |
4588 | logical-OR-expression | |
4589 | logical-OR-expression ? expression : conditional-expression | |
4590 | ||
4591 | GNU extensions: | |
4592 | ||
4593 | conditional-expression: | |
4594 | logical-OR-expression ? : conditional-expression | |
4595 | */ | |
4596 | ||
4597 | static struct c_expr | |
4598 | c_parser_conditional_expression (c_parser *parser, struct c_expr *after) | |
4599 | { | |
4600 | struct c_expr cond, exp1, exp2, ret; | |
744aa42f | 4601 | location_t cond_loc, colon_loc; |
ba47d38d | 4602 | |
27bf414c | 4603 | gcc_assert (!after || c_dialect_objc ()); |
ba47d38d | 4604 | |
27bf414c | 4605 | cond = c_parser_binary_expression (parser, after); |
ba47d38d | 4606 | |
27bf414c JM |
4607 | if (c_parser_next_token_is_not (parser, CPP_QUERY)) |
4608 | return cond; | |
c2255bc4 AH |
4609 | cond_loc = c_parser_peek_token (parser)->location; |
4610 | cond = default_function_array_conversion (cond_loc, cond); | |
27bf414c JM |
4611 | c_parser_consume_token (parser); |
4612 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
4613 | { | |
8ce94e44 | 4614 | tree eptype = NULL_TREE; |
509c9d60 MLI |
4615 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
4616 | "ISO C forbids omitting the middle term of a ?: expression"); | |
8ce94e44 JM |
4617 | if (TREE_CODE (cond.value) == EXCESS_PRECISION_EXPR) |
4618 | { | |
4619 | eptype = TREE_TYPE (cond.value); | |
4620 | cond.value = TREE_OPERAND (cond.value, 0); | |
4621 | } | |
27bf414c | 4622 | /* Make sure first operand is calculated only once. */ |
928c19bb | 4623 | exp1.value = c_save_expr (default_conversion (cond.value)); |
8ce94e44 JM |
4624 | if (eptype) |
4625 | exp1.value = build1 (EXCESS_PRECISION_EXPR, eptype, exp1.value); | |
6866c6e8 | 4626 | exp1.original_type = NULL; |
ba47d38d | 4627 | cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value); |
7d882b83 | 4628 | c_inhibit_evaluation_warnings += cond.value == truthvalue_true_node; |
27bf414c JM |
4629 | } |
4630 | else | |
4631 | { | |
4632 | cond.value | |
85498824 | 4633 | = c_objc_common_truthvalue_conversion |
ba47d38d | 4634 | (cond_loc, default_conversion (cond.value)); |
7d882b83 | 4635 | c_inhibit_evaluation_warnings += cond.value == truthvalue_false_node; |
46bdb9cf | 4636 | exp1 = c_parser_expression_conv (parser); |
7d882b83 ILT |
4637 | c_inhibit_evaluation_warnings += |
4638 | ((cond.value == truthvalue_true_node) | |
4639 | - (cond.value == truthvalue_false_node)); | |
27bf414c | 4640 | } |
744aa42f ILT |
4641 | |
4642 | colon_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4643 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
4644 | { | |
7d882b83 | 4645 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
27bf414c JM |
4646 | ret.value = error_mark_node; |
4647 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 4648 | ret.original_type = NULL; |
27bf414c JM |
4649 | return ret; |
4650 | } | |
c2255bc4 AH |
4651 | { |
4652 | location_t exp2_loc = c_parser_peek_token (parser)->location; | |
4653 | exp2 = c_parser_conditional_expression (parser, NULL); | |
4654 | exp2 = default_function_array_conversion (exp2_loc, exp2); | |
4655 | } | |
7d882b83 | 4656 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
744aa42f | 4657 | ret.value = build_conditional_expr (colon_loc, cond.value, |
928c19bb | 4658 | cond.original_code == C_MAYBE_CONST_EXPR, |
d130ae11 ILT |
4659 | exp1.value, exp1.original_type, |
4660 | exp2.value, exp2.original_type); | |
27bf414c | 4661 | ret.original_code = ERROR_MARK; |
6866c6e8 ILT |
4662 | if (exp1.value == error_mark_node || exp2.value == error_mark_node) |
4663 | ret.original_type = NULL; | |
4664 | else | |
4665 | { | |
4666 | tree t1, t2; | |
4667 | ||
4668 | /* If both sides are enum type, the default conversion will have | |
4669 | made the type of the result be an integer type. We want to | |
4670 | remember the enum types we started with. */ | |
4671 | t1 = exp1.original_type ? exp1.original_type : TREE_TYPE (exp1.value); | |
4672 | t2 = exp2.original_type ? exp2.original_type : TREE_TYPE (exp2.value); | |
4673 | ret.original_type = ((t1 != error_mark_node | |
4674 | && t2 != error_mark_node | |
4675 | && (TYPE_MAIN_VARIANT (t1) | |
4676 | == TYPE_MAIN_VARIANT (t2))) | |
4677 | ? t1 | |
4678 | : NULL); | |
4679 | } | |
27bf414c JM |
4680 | return ret; |
4681 | } | |
4682 | ||
4683 | /* Parse a binary expression; that is, a logical-OR-expression (C90 | |
4684 | 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is | |
4685 | an Objective-C message expression which is the primary-expression | |
4686 | starting the expression as an initializer. | |
4687 | ||
4688 | multiplicative-expression: | |
4689 | cast-expression | |
4690 | multiplicative-expression * cast-expression | |
4691 | multiplicative-expression / cast-expression | |
4692 | multiplicative-expression % cast-expression | |
4693 | ||
4694 | additive-expression: | |
4695 | multiplicative-expression | |
4696 | additive-expression + multiplicative-expression | |
4697 | additive-expression - multiplicative-expression | |
4698 | ||
4699 | shift-expression: | |
4700 | additive-expression | |
4701 | shift-expression << additive-expression | |
4702 | shift-expression >> additive-expression | |
4703 | ||
4704 | relational-expression: | |
4705 | shift-expression | |
4706 | relational-expression < shift-expression | |
4707 | relational-expression > shift-expression | |
4708 | relational-expression <= shift-expression | |
4709 | relational-expression >= shift-expression | |
4710 | ||
4711 | equality-expression: | |
4712 | relational-expression | |
4713 | equality-expression == relational-expression | |
4714 | equality-expression != relational-expression | |
4715 | ||
4716 | AND-expression: | |
4717 | equality-expression | |
4718 | AND-expression & equality-expression | |
4719 | ||
4720 | exclusive-OR-expression: | |
4721 | AND-expression | |
4722 | exclusive-OR-expression ^ AND-expression | |
4723 | ||
4724 | inclusive-OR-expression: | |
4725 | exclusive-OR-expression | |
4726 | inclusive-OR-expression | exclusive-OR-expression | |
4727 | ||
4728 | logical-AND-expression: | |
4729 | inclusive-OR-expression | |
4730 | logical-AND-expression && inclusive-OR-expression | |
4731 | ||
4732 | logical-OR-expression: | |
4733 | logical-AND-expression | |
4734 | logical-OR-expression || logical-AND-expression | |
4735 | */ | |
4736 | ||
4737 | static struct c_expr | |
4738 | c_parser_binary_expression (c_parser *parser, struct c_expr *after) | |
4739 | { | |
4740 | /* A binary expression is parsed using operator-precedence parsing, | |
4741 | with the operands being cast expressions. All the binary | |
4742 | operators are left-associative. Thus a binary expression is of | |
4743 | form: | |
4744 | ||
4745 | E0 op1 E1 op2 E2 ... | |
4746 | ||
4747 | which we represent on a stack. On the stack, the precedence | |
4748 | levels are strictly increasing. When a new operator is | |
4749 | encountered of higher precedence than that at the top of the | |
4750 | stack, it is pushed; its LHS is the top expression, and its RHS | |
4751 | is everything parsed until it is popped. When a new operator is | |
4752 | encountered with precedence less than or equal to that at the top | |
4753 | of the stack, triples E[i-1] op[i] E[i] are popped and replaced | |
4754 | by the result of the operation until the operator at the top of | |
4755 | the stack has lower precedence than the new operator or there is | |
4756 | only one element on the stack; then the top expression is the LHS | |
4757 | of the new operator. In the case of logical AND and OR | |
7d882b83 ILT |
4758 | expressions, we also need to adjust c_inhibit_evaluation_warnings |
4759 | as appropriate when the operators are pushed and popped. */ | |
27bf414c JM |
4760 | |
4761 | /* The precedence levels, where 0 is a dummy lowest level used for | |
4762 | the bottom of the stack. */ | |
4763 | enum prec { | |
4764 | PREC_NONE, | |
4765 | PREC_LOGOR, | |
4766 | PREC_LOGAND, | |
4767 | PREC_BITOR, | |
4768 | PREC_BITXOR, | |
4769 | PREC_BITAND, | |
4770 | PREC_EQ, | |
4771 | PREC_REL, | |
4772 | PREC_SHIFT, | |
4773 | PREC_ADD, | |
4774 | PREC_MULT, | |
4775 | NUM_PRECS | |
4776 | }; | |
4777 | struct { | |
4778 | /* The expression at this stack level. */ | |
4779 | struct c_expr expr; | |
4780 | /* The precedence of the operator on its left, PREC_NONE at the | |
4781 | bottom of the stack. */ | |
4782 | enum prec prec; | |
4783 | /* The operation on its left. */ | |
4784 | enum tree_code op; | |
ca80e52b EB |
4785 | /* The source location of this operation. */ |
4786 | location_t loc; | |
27bf414c JM |
4787 | } stack[NUM_PRECS]; |
4788 | int sp; | |
ba47d38d | 4789 | /* Location of the binary operator. */ |
1f6d0c60 | 4790 | location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
4791 | #define POP \ |
4792 | do { \ | |
4793 | switch (stack[sp].op) \ | |
4794 | { \ | |
4795 | case TRUTH_ANDIF_EXPR: \ | |
7d882b83 ILT |
4796 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
4797 | == truthvalue_false_node); \ | |
27bf414c JM |
4798 | break; \ |
4799 | case TRUTH_ORIF_EXPR: \ | |
7d882b83 ILT |
4800 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
4801 | == truthvalue_true_node); \ | |
27bf414c JM |
4802 | break; \ |
4803 | default: \ | |
4804 | break; \ | |
4805 | } \ | |
f2a71bbc | 4806 | stack[sp - 1].expr \ |
c2255bc4 AH |
4807 | = default_function_array_conversion (stack[sp - 1].loc, \ |
4808 | stack[sp - 1].expr); \ | |
f2a71bbc | 4809 | stack[sp].expr \ |
c2255bc4 | 4810 | = default_function_array_conversion (stack[sp].loc, stack[sp].expr); \ |
ca80e52b | 4811 | stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \ |
ba47d38d | 4812 | stack[sp].op, \ |
27bf414c JM |
4813 | stack[sp - 1].expr, \ |
4814 | stack[sp].expr); \ | |
4815 | sp--; \ | |
4816 | } while (0) | |
4817 | gcc_assert (!after || c_dialect_objc ()); | |
ca80e52b | 4818 | stack[0].loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4819 | stack[0].expr = c_parser_cast_expression (parser, after); |
4820 | stack[0].prec = PREC_NONE; | |
4821 | sp = 0; | |
4822 | while (true) | |
4823 | { | |
4824 | enum prec oprec; | |
4825 | enum tree_code ocode; | |
4826 | if (parser->error) | |
4827 | goto out; | |
4828 | switch (c_parser_peek_token (parser)->type) | |
4829 | { | |
4830 | case CPP_MULT: | |
4831 | oprec = PREC_MULT; | |
4832 | ocode = MULT_EXPR; | |
4833 | break; | |
4834 | case CPP_DIV: | |
4835 | oprec = PREC_MULT; | |
4836 | ocode = TRUNC_DIV_EXPR; | |
4837 | break; | |
4838 | case CPP_MOD: | |
4839 | oprec = PREC_MULT; | |
4840 | ocode = TRUNC_MOD_EXPR; | |
4841 | break; | |
4842 | case CPP_PLUS: | |
4843 | oprec = PREC_ADD; | |
4844 | ocode = PLUS_EXPR; | |
4845 | break; | |
4846 | case CPP_MINUS: | |
4847 | oprec = PREC_ADD; | |
4848 | ocode = MINUS_EXPR; | |
4849 | break; | |
4850 | case CPP_LSHIFT: | |
4851 | oprec = PREC_SHIFT; | |
4852 | ocode = LSHIFT_EXPR; | |
4853 | break; | |
4854 | case CPP_RSHIFT: | |
4855 | oprec = PREC_SHIFT; | |
4856 | ocode = RSHIFT_EXPR; | |
4857 | break; | |
4858 | case CPP_LESS: | |
4859 | oprec = PREC_REL; | |
4860 | ocode = LT_EXPR; | |
4861 | break; | |
4862 | case CPP_GREATER: | |
4863 | oprec = PREC_REL; | |
4864 | ocode = GT_EXPR; | |
4865 | break; | |
4866 | case CPP_LESS_EQ: | |
4867 | oprec = PREC_REL; | |
4868 | ocode = LE_EXPR; | |
4869 | break; | |
4870 | case CPP_GREATER_EQ: | |
4871 | oprec = PREC_REL; | |
4872 | ocode = GE_EXPR; | |
4873 | break; | |
4874 | case CPP_EQ_EQ: | |
4875 | oprec = PREC_EQ; | |
4876 | ocode = EQ_EXPR; | |
4877 | break; | |
4878 | case CPP_NOT_EQ: | |
4879 | oprec = PREC_EQ; | |
4880 | ocode = NE_EXPR; | |
4881 | break; | |
4882 | case CPP_AND: | |
4883 | oprec = PREC_BITAND; | |
4884 | ocode = BIT_AND_EXPR; | |
4885 | break; | |
4886 | case CPP_XOR: | |
4887 | oprec = PREC_BITXOR; | |
4888 | ocode = BIT_XOR_EXPR; | |
4889 | break; | |
4890 | case CPP_OR: | |
4891 | oprec = PREC_BITOR; | |
4892 | ocode = BIT_IOR_EXPR; | |
4893 | break; | |
4894 | case CPP_AND_AND: | |
4895 | oprec = PREC_LOGAND; | |
4896 | ocode = TRUTH_ANDIF_EXPR; | |
4897 | break; | |
4898 | case CPP_OR_OR: | |
4899 | oprec = PREC_LOGOR; | |
4900 | ocode = TRUTH_ORIF_EXPR; | |
4901 | break; | |
4902 | default: | |
4903 | /* Not a binary operator, so end of the binary | |
4904 | expression. */ | |
4905 | goto out; | |
4906 | } | |
ba47d38d | 4907 | binary_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4908 | c_parser_consume_token (parser); |
4909 | while (oprec <= stack[sp].prec) | |
4910 | POP; | |
4911 | switch (ocode) | |
4912 | { | |
4913 | case TRUTH_ANDIF_EXPR: | |
f2a71bbc | 4914 | stack[sp].expr |
c2255bc4 AH |
4915 | = default_function_array_conversion (stack[sp].loc, |
4916 | stack[sp].expr); | |
85498824 | 4917 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 4918 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
4919 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
4920 | == truthvalue_false_node); | |
27bf414c JM |
4921 | break; |
4922 | case TRUTH_ORIF_EXPR: | |
f2a71bbc | 4923 | stack[sp].expr |
c2255bc4 AH |
4924 | = default_function_array_conversion (stack[sp].loc, |
4925 | stack[sp].expr); | |
85498824 | 4926 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 4927 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
4928 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
4929 | == truthvalue_true_node); | |
27bf414c JM |
4930 | break; |
4931 | default: | |
4932 | break; | |
4933 | } | |
4934 | sp++; | |
ca80e52b | 4935 | stack[sp].loc = binary_loc; |
27bf414c JM |
4936 | stack[sp].expr = c_parser_cast_expression (parser, NULL); |
4937 | stack[sp].prec = oprec; | |
4938 | stack[sp].op = ocode; | |
c2255bc4 | 4939 | stack[sp].loc = binary_loc; |
27bf414c JM |
4940 | } |
4941 | out: | |
4942 | while (sp > 0) | |
4943 | POP; | |
4944 | return stack[0].expr; | |
4945 | #undef POP | |
4946 | } | |
4947 | ||
4948 | /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not | |
4949 | NULL then it is an Objective-C message expression which is the | |
4950 | primary-expression starting the expression as an initializer. | |
4951 | ||
4952 | cast-expression: | |
4953 | unary-expression | |
4954 | ( type-name ) unary-expression | |
4955 | */ | |
4956 | ||
4957 | static struct c_expr | |
4958 | c_parser_cast_expression (c_parser *parser, struct c_expr *after) | |
4959 | { | |
c2255bc4 | 4960 | location_t cast_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4961 | gcc_assert (!after || c_dialect_objc ()); |
4962 | if (after) | |
c2255bc4 AH |
4963 | return c_parser_postfix_expression_after_primary (parser, |
4964 | cast_loc, *after); | |
27bf414c JM |
4965 | /* If the expression begins with a parenthesized type name, it may |
4966 | be either a cast or a compound literal; we need to see whether | |
4967 | the next character is '{' to tell the difference. If not, it is | |
4968 | an unary expression. */ | |
4969 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
4970 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
4971 | { | |
4972 | struct c_type_name *type_name; | |
4973 | struct c_expr ret; | |
f2a71bbc | 4974 | struct c_expr expr; |
27bf414c JM |
4975 | c_parser_consume_token (parser); |
4976 | type_name = c_parser_type_name (parser); | |
4977 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4978 | if (type_name == NULL) | |
4979 | { | |
4980 | ret.value = error_mark_node; | |
4981 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 4982 | ret.original_type = NULL; |
27bf414c JM |
4983 | return ret; |
4984 | } | |
33c9159e AH |
4985 | |
4986 | /* Save casted types in the function's used types hash table. */ | |
8d8d1a28 | 4987 | used_types_insert (type_name->specs->type); |
33c9159e | 4988 | |
27bf414c | 4989 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
24b97832 | 4990 | return c_parser_postfix_expression_after_paren_type (parser, type_name, |
c2255bc4 AH |
4991 | cast_loc); |
4992 | { | |
4993 | location_t expr_loc = c_parser_peek_token (parser)->location; | |
4994 | expr = c_parser_cast_expression (parser, NULL); | |
4995 | expr = default_function_array_conversion (expr_loc, expr); | |
4996 | } | |
4997 | ret.value = c_cast_expr (cast_loc, type_name, expr.value); | |
27bf414c | 4998 | ret.original_code = ERROR_MARK; |
6866c6e8 | 4999 | ret.original_type = NULL; |
27bf414c JM |
5000 | return ret; |
5001 | } | |
5002 | else | |
5003 | return c_parser_unary_expression (parser); | |
5004 | } | |
5005 | ||
5006 | /* Parse an unary expression (C90 6.3.3, C99 6.5.3). | |
5007 | ||
5008 | unary-expression: | |
5009 | postfix-expression | |
5010 | ++ unary-expression | |
5011 | -- unary-expression | |
5012 | unary-operator cast-expression | |
5013 | sizeof unary-expression | |
5014 | sizeof ( type-name ) | |
5015 | ||
5016 | unary-operator: one of | |
5017 | & * + - ~ ! | |
5018 | ||
5019 | GNU extensions: | |
5020 | ||
5021 | unary-expression: | |
5022 | __alignof__ unary-expression | |
5023 | __alignof__ ( type-name ) | |
5024 | && identifier | |
5025 | ||
5026 | unary-operator: one of | |
5027 | __extension__ __real__ __imag__ | |
5028 | ||
5029 | In addition, the GNU syntax treats ++ and -- as unary operators, so | |
5030 | they may be applied to cast expressions with errors for non-lvalues | |
5031 | given later. */ | |
5032 | ||
5033 | static struct c_expr | |
5034 | c_parser_unary_expression (c_parser *parser) | |
5035 | { | |
5036 | int ext; | |
46bdb9cf | 5037 | struct c_expr ret, op; |
c2255bc4 AH |
5038 | location_t op_loc = c_parser_peek_token (parser)->location; |
5039 | location_t exp_loc; | |
6866c6e8 ILT |
5040 | ret.original_code = ERROR_MARK; |
5041 | ret.original_type = NULL; | |
27bf414c JM |
5042 | switch (c_parser_peek_token (parser)->type) |
5043 | { | |
5044 | case CPP_PLUS_PLUS: | |
5045 | c_parser_consume_token (parser); | |
c2255bc4 | 5046 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5047 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5048 | op = default_function_array_conversion (exp_loc, op); |
5049 | return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op); | |
27bf414c JM |
5050 | case CPP_MINUS_MINUS: |
5051 | c_parser_consume_token (parser); | |
c2255bc4 | 5052 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5053 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5054 | op = default_function_array_conversion (exp_loc, op); |
5055 | return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op); | |
27bf414c JM |
5056 | case CPP_AND: |
5057 | c_parser_consume_token (parser); | |
c2255bc4 AH |
5058 | return parser_build_unary_op (op_loc, ADDR_EXPR, |
5059 | c_parser_cast_expression (parser, NULL)); | |
27bf414c JM |
5060 | case CPP_MULT: |
5061 | c_parser_consume_token (parser); | |
c2255bc4 | 5062 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5063 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5064 | op = default_function_array_conversion (exp_loc, op); |
5065 | ret.value = build_indirect_ref (op_loc, op.value, "unary *"); | |
27bf414c JM |
5066 | return ret; |
5067 | case CPP_PLUS: | |
44c21c7f | 5068 | if (!c_dialect_objc () && !in_system_header) |
c2255bc4 | 5069 | warning_at (op_loc, |
3ba09659 AH |
5070 | OPT_Wtraditional, |
5071 | "traditional C rejects the unary plus operator"); | |
c7412148 | 5072 | c_parser_consume_token (parser); |
c2255bc4 | 5073 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5074 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5075 | op = default_function_array_conversion (exp_loc, op); |
5076 | return parser_build_unary_op (op_loc, CONVERT_EXPR, op); | |
27bf414c JM |
5077 | case CPP_MINUS: |
5078 | c_parser_consume_token (parser); | |
c2255bc4 | 5079 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5080 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5081 | op = default_function_array_conversion (exp_loc, op); |
5082 | return parser_build_unary_op (op_loc, NEGATE_EXPR, op); | |
27bf414c JM |
5083 | case CPP_COMPL: |
5084 | c_parser_consume_token (parser); | |
c2255bc4 | 5085 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5086 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5087 | op = default_function_array_conversion (exp_loc, op); |
5088 | return parser_build_unary_op (op_loc, BIT_NOT_EXPR, op); | |
27bf414c JM |
5089 | case CPP_NOT: |
5090 | c_parser_consume_token (parser); | |
c2255bc4 | 5091 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5092 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5093 | op = default_function_array_conversion (exp_loc, op); |
5094 | return parser_build_unary_op (op_loc, TRUTH_NOT_EXPR, op); | |
27bf414c JM |
5095 | case CPP_AND_AND: |
5096 | /* Refer to the address of a label as a pointer. */ | |
5097 | c_parser_consume_token (parser); | |
5098 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5099 | { | |
5100 | ret.value = finish_label_address_expr | |
c2255bc4 | 5101 | (c_parser_peek_token (parser)->value, op_loc); |
27bf414c | 5102 | c_parser_consume_token (parser); |
27bf414c JM |
5103 | } |
5104 | else | |
5105 | { | |
5106 | c_parser_error (parser, "expected identifier"); | |
5107 | ret.value = error_mark_node; | |
27bf414c | 5108 | } |
43f6dfd3 | 5109 | return ret; |
27bf414c JM |
5110 | case CPP_KEYWORD: |
5111 | switch (c_parser_peek_token (parser)->keyword) | |
5112 | { | |
5113 | case RID_SIZEOF: | |
5114 | return c_parser_sizeof_expression (parser); | |
5115 | case RID_ALIGNOF: | |
5116 | return c_parser_alignof_expression (parser); | |
5117 | case RID_EXTENSION: | |
5118 | c_parser_consume_token (parser); | |
5119 | ext = disable_extension_diagnostics (); | |
5120 | ret = c_parser_cast_expression (parser, NULL); | |
5121 | restore_extension_diagnostics (ext); | |
5122 | return ret; | |
5123 | case RID_REALPART: | |
5124 | c_parser_consume_token (parser); | |
c2255bc4 | 5125 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5126 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5127 | op = default_function_array_conversion (exp_loc, op); |
5128 | return parser_build_unary_op (op_loc, REALPART_EXPR, op); | |
27bf414c JM |
5129 | case RID_IMAGPART: |
5130 | c_parser_consume_token (parser); | |
c2255bc4 | 5131 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5132 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5133 | op = default_function_array_conversion (exp_loc, op); |
5134 | return parser_build_unary_op (op_loc, IMAGPART_EXPR, op); | |
27bf414c JM |
5135 | default: |
5136 | return c_parser_postfix_expression (parser); | |
5137 | } | |
5138 | default: | |
5139 | return c_parser_postfix_expression (parser); | |
5140 | } | |
5141 | } | |
5142 | ||
5143 | /* Parse a sizeof expression. */ | |
5144 | ||
5145 | static struct c_expr | |
5146 | c_parser_sizeof_expression (c_parser *parser) | |
5147 | { | |
5148 | struct c_expr expr; | |
c7412148 | 5149 | location_t expr_loc; |
27bf414c JM |
5150 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF)); |
5151 | c_parser_consume_token (parser); | |
7d882b83 | 5152 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
5153 | in_sizeof++; |
5154 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5155 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5156 | { | |
5157 | /* Either sizeof ( type-name ) or sizeof unary-expression | |
5158 | starting with a compound literal. */ | |
5159 | struct c_type_name *type_name; | |
5160 | c_parser_consume_token (parser); | |
c7412148 | 5161 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5162 | type_name = c_parser_type_name (parser); |
5163 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5164 | if (type_name == NULL) | |
5165 | { | |
5166 | struct c_expr ret; | |
7d882b83 | 5167 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
5168 | in_sizeof--; |
5169 | ret.value = error_mark_node; | |
5170 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5171 | ret.original_type = NULL; |
27bf414c JM |
5172 | return ret; |
5173 | } | |
5174 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5175 | { | |
5176 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5177 | type_name, |
5178 | expr_loc); | |
27bf414c JM |
5179 | goto sizeof_expr; |
5180 | } | |
5181 | /* sizeof ( type-name ). */ | |
7d882b83 | 5182 | c_inhibit_evaluation_warnings--; |
27bf414c | 5183 | in_sizeof--; |
c2255bc4 | 5184 | return c_expr_sizeof_type (expr_loc, type_name); |
27bf414c JM |
5185 | } |
5186 | else | |
5187 | { | |
c7412148 | 5188 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5189 | expr = c_parser_unary_expression (parser); |
5190 | sizeof_expr: | |
7d882b83 | 5191 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
5192 | in_sizeof--; |
5193 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
5194 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 5195 | error_at (expr_loc, "%<sizeof%> applied to a bit-field"); |
c2255bc4 | 5196 | return c_expr_sizeof_expr (expr_loc, expr); |
27bf414c JM |
5197 | } |
5198 | } | |
5199 | ||
5200 | /* Parse an alignof expression. */ | |
5201 | ||
5202 | static struct c_expr | |
5203 | c_parser_alignof_expression (c_parser *parser) | |
5204 | { | |
5205 | struct c_expr expr; | |
c2255bc4 | 5206 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5207 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF)); |
5208 | c_parser_consume_token (parser); | |
7d882b83 | 5209 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
5210 | in_alignof++; |
5211 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5212 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5213 | { | |
5214 | /* Either __alignof__ ( type-name ) or __alignof__ | |
5215 | unary-expression starting with a compound literal. */ | |
24b97832 | 5216 | location_t loc; |
27bf414c JM |
5217 | struct c_type_name *type_name; |
5218 | struct c_expr ret; | |
5219 | c_parser_consume_token (parser); | |
24b97832 | 5220 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5221 | type_name = c_parser_type_name (parser); |
5222 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5223 | if (type_name == NULL) | |
5224 | { | |
5225 | struct c_expr ret; | |
7d882b83 | 5226 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
5227 | in_alignof--; |
5228 | ret.value = error_mark_node; | |
5229 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5230 | ret.original_type = NULL; |
27bf414c JM |
5231 | return ret; |
5232 | } | |
5233 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5234 | { | |
5235 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5236 | type_name, |
5237 | loc); | |
27bf414c JM |
5238 | goto alignof_expr; |
5239 | } | |
5240 | /* alignof ( type-name ). */ | |
7d882b83 | 5241 | c_inhibit_evaluation_warnings--; |
27bf414c | 5242 | in_alignof--; |
c2255bc4 | 5243 | ret.value = c_alignof (loc, groktypename (type_name, NULL, NULL)); |
27bf414c | 5244 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5245 | ret.original_type = NULL; |
27bf414c JM |
5246 | return ret; |
5247 | } | |
5248 | else | |
5249 | { | |
5250 | struct c_expr ret; | |
5251 | expr = c_parser_unary_expression (parser); | |
5252 | alignof_expr: | |
7d882b83 | 5253 | c_inhibit_evaluation_warnings--; |
27bf414c | 5254 | in_alignof--; |
c2255bc4 | 5255 | ret.value = c_alignof_expr (loc, expr.value); |
27bf414c | 5256 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5257 | ret.original_type = NULL; |
27bf414c JM |
5258 | return ret; |
5259 | } | |
5260 | } | |
5261 | ||
5262 | /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2). | |
5263 | ||
5264 | postfix-expression: | |
5265 | primary-expression | |
5266 | postfix-expression [ expression ] | |
5267 | postfix-expression ( argument-expression-list[opt] ) | |
5268 | postfix-expression . identifier | |
5269 | postfix-expression -> identifier | |
5270 | postfix-expression ++ | |
5271 | postfix-expression -- | |
5272 | ( type-name ) { initializer-list } | |
5273 | ( type-name ) { initializer-list , } | |
5274 | ||
5275 | argument-expression-list: | |
5276 | argument-expression | |
5277 | argument-expression-list , argument-expression | |
5278 | ||
5279 | primary-expression: | |
5280 | identifier | |
5281 | constant | |
5282 | string-literal | |
5283 | ( expression ) | |
5284 | ||
5285 | GNU extensions: | |
5286 | ||
5287 | primary-expression: | |
5288 | __func__ | |
5289 | (treated as a keyword in GNU C) | |
5290 | __FUNCTION__ | |
5291 | __PRETTY_FUNCTION__ | |
5292 | ( compound-statement ) | |
5293 | __builtin_va_arg ( assignment-expression , type-name ) | |
5294 | __builtin_offsetof ( type-name , offsetof-member-designator ) | |
5295 | __builtin_choose_expr ( assignment-expression , | |
5296 | assignment-expression , | |
5297 | assignment-expression ) | |
5298 | __builtin_types_compatible_p ( type-name , type-name ) | |
5299 | ||
5300 | offsetof-member-designator: | |
5301 | identifier | |
5302 | offsetof-member-designator . identifier | |
5303 | offsetof-member-designator [ expression ] | |
5304 | ||
5305 | Objective-C: | |
5306 | ||
5307 | primary-expression: | |
5308 | [ objc-receiver objc-message-args ] | |
5309 | @selector ( objc-selector-arg ) | |
5310 | @protocol ( identifier ) | |
5311 | @encode ( type-name ) | |
5312 | objc-string-literal | |
5313 | */ | |
5314 | ||
5315 | static struct c_expr | |
5316 | c_parser_postfix_expression (c_parser *parser) | |
5317 | { | |
5318 | struct c_expr expr, e1, e2, e3; | |
5319 | struct c_type_name *t1, *t2; | |
c2255bc4 | 5320 | location_t loc = c_parser_peek_token (parser)->location;; |
6866c6e8 ILT |
5321 | expr.original_code = ERROR_MARK; |
5322 | expr.original_type = NULL; | |
27bf414c JM |
5323 | switch (c_parser_peek_token (parser)->type) |
5324 | { | |
5325 | case CPP_NUMBER: | |
754ccf7c | 5326 | expr.value = c_parser_peek_token (parser)->value; |
754ccf7c JJ |
5327 | loc = c_parser_peek_token (parser)->location; |
5328 | c_parser_consume_token (parser); | |
5329 | if (TREE_CODE (expr.value) == FIXED_CST | |
5330 | && !targetm.fixed_point_supported_p ()) | |
5331 | { | |
5332 | error_at (loc, "fixed-point types not supported for this target"); | |
5333 | expr.value = error_mark_node; | |
5334 | } | |
5335 | break; | |
27bf414c | 5336 | case CPP_CHAR: |
b6baa67d KVH |
5337 | case CPP_CHAR16: |
5338 | case CPP_CHAR32: | |
27bf414c JM |
5339 | case CPP_WCHAR: |
5340 | expr.value = c_parser_peek_token (parser)->value; | |
27bf414c JM |
5341 | c_parser_consume_token (parser); |
5342 | break; | |
5343 | case CPP_STRING: | |
b6baa67d KVH |
5344 | case CPP_STRING16: |
5345 | case CPP_STRING32: | |
27bf414c JM |
5346 | case CPP_WSTRING: |
5347 | expr.value = c_parser_peek_token (parser)->value; | |
5348 | expr.original_code = STRING_CST; | |
5349 | c_parser_consume_token (parser); | |
5350 | break; | |
5351 | case CPP_OBJC_STRING: | |
5352 | gcc_assert (c_dialect_objc ()); | |
5353 | expr.value | |
5354 | = objc_build_string_object (c_parser_peek_token (parser)->value); | |
27bf414c JM |
5355 | c_parser_consume_token (parser); |
5356 | break; | |
5357 | case CPP_NAME: | |
5358 | if (c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
5359 | { | |
5360 | c_parser_error (parser, "expected expression"); | |
5361 | expr.value = error_mark_node; | |
27bf414c JM |
5362 | break; |
5363 | } | |
5364 | { | |
5365 | tree id = c_parser_peek_token (parser)->value; | |
5366 | c_parser_consume_token (parser); | |
c2255bc4 | 5367 | expr.value = build_external_ref (loc, id, |
27bf414c | 5368 | (c_parser_peek_token (parser)->type |
c2255bc4 | 5369 | == CPP_OPEN_PAREN), |
6866c6e8 | 5370 | &expr.original_type); |
27bf414c JM |
5371 | } |
5372 | break; | |
5373 | case CPP_OPEN_PAREN: | |
5374 | /* A parenthesized expression, statement expression or compound | |
5375 | literal. */ | |
5376 | if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE) | |
5377 | { | |
5378 | /* A statement expression. */ | |
5379 | tree stmt; | |
c2255bc4 | 5380 | location_t brace_loc; |
27bf414c | 5381 | c_parser_consume_token (parser); |
c2255bc4 | 5382 | brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5383 | c_parser_consume_token (parser); |
5384 | if (cur_stmt_list == NULL) | |
5385 | { | |
c2255bc4 | 5386 | error_at (loc, "braced-group within expression allowed " |
3ba09659 | 5387 | "only inside a function"); |
27bf414c JM |
5388 | parser->error = true; |
5389 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
5390 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5391 | expr.value = error_mark_node; | |
27bf414c JM |
5392 | break; |
5393 | } | |
5394 | stmt = c_begin_stmt_expr (); | |
5395 | c_parser_compound_statement_nostart (parser); | |
5396 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5397 | "expected %<)%>"); | |
c2255bc4 | 5398 | pedwarn (loc, OPT_pedantic, |
509c9d60 | 5399 | "ISO C forbids braced-groups within expressions"); |
c2255bc4 | 5400 | expr.value = c_finish_stmt_expr (brace_loc, stmt); |
27bf414c JM |
5401 | } |
5402 | else if (c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5403 | { | |
5404 | /* A compound literal. ??? Can we actually get here rather | |
5405 | than going directly to | |
5406 | c_parser_postfix_expression_after_paren_type from | |
5407 | elsewhere? */ | |
24b97832 | 5408 | location_t loc; |
27bf414c JM |
5409 | struct c_type_name *type_name; |
5410 | c_parser_consume_token (parser); | |
24b97832 | 5411 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5412 | type_name = c_parser_type_name (parser); |
5413 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5414 | "expected %<)%>"); | |
5415 | if (type_name == NULL) | |
5416 | { | |
5417 | expr.value = error_mark_node; | |
27bf414c JM |
5418 | } |
5419 | else | |
5420 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
5421 | type_name, |
5422 | loc); | |
27bf414c JM |
5423 | } |
5424 | else | |
5425 | { | |
5426 | /* A parenthesized expression. */ | |
5427 | c_parser_consume_token (parser); | |
5428 | expr = c_parser_expression (parser); | |
5429 | if (TREE_CODE (expr.value) == MODIFY_EXPR) | |
5430 | TREE_NO_WARNING (expr.value) = 1; | |
928c19bb JM |
5431 | if (expr.original_code != C_MAYBE_CONST_EXPR) |
5432 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 5433 | /* Don't change EXPR.ORIGINAL_TYPE. */ |
27bf414c JM |
5434 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
5435 | "expected %<)%>"); | |
5436 | } | |
5437 | break; | |
5438 | case CPP_KEYWORD: | |
5439 | switch (c_parser_peek_token (parser)->keyword) | |
5440 | { | |
5441 | case RID_FUNCTION_NAME: | |
5442 | case RID_PRETTY_FUNCTION_NAME: | |
5443 | case RID_C99_FUNCTION_NAME: | |
c2255bc4 | 5444 | expr.value = fname_decl (loc, |
3ba09659 | 5445 | c_parser_peek_token (parser)->keyword, |
27bf414c | 5446 | c_parser_peek_token (parser)->value); |
27bf414c JM |
5447 | c_parser_consume_token (parser); |
5448 | break; | |
5449 | case RID_VA_ARG: | |
5450 | c_parser_consume_token (parser); | |
5451 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5452 | { | |
5453 | expr.value = error_mark_node; | |
27bf414c JM |
5454 | break; |
5455 | } | |
5456 | e1 = c_parser_expr_no_commas (parser, NULL); | |
928c19bb | 5457 | e1.value = c_fully_fold (e1.value, false, NULL); |
27bf414c JM |
5458 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
5459 | { | |
5460 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5461 | expr.value = error_mark_node; | |
27bf414c JM |
5462 | break; |
5463 | } | |
72b5577d | 5464 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5465 | t1 = c_parser_type_name (parser); |
5466 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5467 | "expected %<)%>"); | |
5468 | if (t1 == NULL) | |
5469 | { | |
5470 | expr.value = error_mark_node; | |
27bf414c JM |
5471 | } |
5472 | else | |
5473 | { | |
928c19bb | 5474 | tree type_expr = NULL_TREE; |
c2255bc4 AH |
5475 | expr.value = c_build_va_arg (loc, e1.value, |
5476 | groktypename (t1, &type_expr, NULL)); | |
928c19bb JM |
5477 | if (type_expr) |
5478 | { | |
5479 | expr.value = build2 (C_MAYBE_CONST_EXPR, | |
5480 | TREE_TYPE (expr.value), type_expr, | |
5481 | expr.value); | |
5482 | C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true; | |
5483 | } | |
27bf414c JM |
5484 | } |
5485 | break; | |
5486 | case RID_OFFSETOF: | |
5487 | c_parser_consume_token (parser); | |
5488 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5489 | { | |
5490 | expr.value = error_mark_node; | |
27bf414c JM |
5491 | break; |
5492 | } | |
5493 | t1 = c_parser_type_name (parser); | |
5494 | if (t1 == NULL) | |
5495 | { | |
5496 | expr.value = error_mark_node; | |
27bf414c JM |
5497 | break; |
5498 | } | |
5499 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5500 | { | |
5501 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5502 | expr.value = error_mark_node; | |
27bf414c JM |
5503 | break; |
5504 | } | |
5505 | { | |
928c19bb | 5506 | tree type = groktypename (t1, NULL, NULL); |
27bf414c JM |
5507 | tree offsetof_ref; |
5508 | if (type == error_mark_node) | |
5509 | offsetof_ref = error_mark_node; | |
5510 | else | |
c2255bc4 AH |
5511 | { |
5512 | offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node); | |
5513 | SET_EXPR_LOCATION (offsetof_ref, loc); | |
5514 | } | |
27bf414c JM |
5515 | /* Parse the second argument to __builtin_offsetof. We |
5516 | must have one identifier, and beyond that we want to | |
5517 | accept sub structure and sub array references. */ | |
5518 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5519 | { | |
5520 | offsetof_ref = build_component_ref | |
c2255bc4 | 5521 | (loc, offsetof_ref, c_parser_peek_token (parser)->value); |
27bf414c JM |
5522 | c_parser_consume_token (parser); |
5523 | while (c_parser_next_token_is (parser, CPP_DOT) | |
5524 | || c_parser_next_token_is (parser, | |
634b5df5 JJ |
5525 | CPP_OPEN_SQUARE) |
5526 | || c_parser_next_token_is (parser, | |
5527 | CPP_DEREF)) | |
27bf414c | 5528 | { |
634b5df5 JJ |
5529 | if (c_parser_next_token_is (parser, CPP_DEREF)) |
5530 | { | |
5531 | loc = c_parser_peek_token (parser)->location; | |
c2255bc4 AH |
5532 | offsetof_ref = build_array_ref (loc, |
5533 | offsetof_ref, | |
5534 | integer_zero_node); | |
634b5df5 JJ |
5535 | goto do_dot; |
5536 | } | |
5537 | else if (c_parser_next_token_is (parser, CPP_DOT)) | |
27bf414c | 5538 | { |
634b5df5 | 5539 | do_dot: |
27bf414c JM |
5540 | c_parser_consume_token (parser); |
5541 | if (c_parser_next_token_is_not (parser, | |
5542 | CPP_NAME)) | |
5543 | { | |
5544 | c_parser_error (parser, "expected identifier"); | |
5545 | break; | |
5546 | } | |
5547 | offsetof_ref = build_component_ref | |
c2255bc4 | 5548 | (loc, offsetof_ref, |
27bf414c JM |
5549 | c_parser_peek_token (parser)->value); |
5550 | c_parser_consume_token (parser); | |
5551 | } | |
5552 | else | |
5553 | { | |
5554 | tree idx; | |
6a3799eb | 5555 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5556 | c_parser_consume_token (parser); |
5557 | idx = c_parser_expression (parser).value; | |
928c19bb | 5558 | idx = c_fully_fold (idx, false, NULL); |
27bf414c JM |
5559 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, |
5560 | "expected %<]%>"); | |
c2255bc4 | 5561 | offsetof_ref = build_array_ref (loc, offsetof_ref, idx); |
27bf414c JM |
5562 | } |
5563 | } | |
5564 | } | |
5565 | else | |
5566 | c_parser_error (parser, "expected identifier"); | |
5567 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5568 | "expected %<)%>"); | |
6d4d7b0e | 5569 | expr.value = fold_offsetof (offsetof_ref, NULL_TREE); |
27bf414c JM |
5570 | } |
5571 | break; | |
5572 | case RID_CHOOSE_EXPR: | |
5573 | c_parser_consume_token (parser); | |
5574 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5575 | { | |
5576 | expr.value = error_mark_node; | |
27bf414c JM |
5577 | break; |
5578 | } | |
c7412148 | 5579 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5580 | e1 = c_parser_expr_no_commas (parser, NULL); |
5581 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5582 | { | |
5583 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5584 | expr.value = error_mark_node; | |
27bf414c JM |
5585 | break; |
5586 | } | |
5587 | e2 = c_parser_expr_no_commas (parser, NULL); | |
5588 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5589 | { | |
5590 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5591 | expr.value = error_mark_node; | |
27bf414c JM |
5592 | break; |
5593 | } | |
5594 | e3 = c_parser_expr_no_commas (parser, NULL); | |
5595 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5596 | "expected %<)%>"); | |
5597 | { | |
5598 | tree c; | |
5599 | ||
4d84fe7c | 5600 | c = e1.value; |
928c19bb JM |
5601 | if (TREE_CODE (c) != INTEGER_CST |
5602 | || !INTEGRAL_TYPE_P (TREE_TYPE (c))) | |
3ba09659 AH |
5603 | error_at (loc, |
5604 | "first argument to %<__builtin_choose_expr%> not" | |
5605 | " a constant"); | |
928c19bb | 5606 | constant_expression_warning (c); |
27bf414c JM |
5607 | expr = integer_zerop (c) ? e3 : e2; |
5608 | } | |
5609 | break; | |
5610 | case RID_TYPES_COMPATIBLE_P: | |
5611 | c_parser_consume_token (parser); | |
5612 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5613 | { | |
5614 | expr.value = error_mark_node; | |
27bf414c JM |
5615 | break; |
5616 | } | |
5617 | t1 = c_parser_type_name (parser); | |
5618 | if (t1 == NULL) | |
5619 | { | |
5620 | expr.value = error_mark_node; | |
27bf414c JM |
5621 | break; |
5622 | } | |
5623 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5624 | { | |
5625 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5626 | expr.value = error_mark_node; | |
27bf414c JM |
5627 | break; |
5628 | } | |
5629 | t2 = c_parser_type_name (parser); | |
5630 | if (t2 == NULL) | |
5631 | { | |
5632 | expr.value = error_mark_node; | |
27bf414c JM |
5633 | break; |
5634 | } | |
5635 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5636 | "expected %<)%>"); | |
5637 | { | |
5638 | tree e1, e2; | |
5639 | ||
928c19bb JM |
5640 | e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL)); |
5641 | e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL)); | |
27bf414c JM |
5642 | |
5643 | expr.value = comptypes (e1, e2) | |
5644 | ? build_int_cst (NULL_TREE, 1) | |
5645 | : build_int_cst (NULL_TREE, 0); | |
27bf414c JM |
5646 | } |
5647 | break; | |
5648 | case RID_AT_SELECTOR: | |
5649 | gcc_assert (c_dialect_objc ()); | |
5650 | c_parser_consume_token (parser); | |
5651 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5652 | { | |
5653 | expr.value = error_mark_node; | |
27bf414c JM |
5654 | break; |
5655 | } | |
5656 | { | |
5657 | tree sel = c_parser_objc_selector_arg (parser); | |
5658 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5659 | "expected %<)%>"); | |
c2255bc4 | 5660 | expr.value = objc_build_selector_expr (loc, sel); |
27bf414c JM |
5661 | } |
5662 | break; | |
5663 | case RID_AT_PROTOCOL: | |
5664 | gcc_assert (c_dialect_objc ()); | |
5665 | c_parser_consume_token (parser); | |
5666 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5667 | { | |
5668 | expr.value = error_mark_node; | |
27bf414c JM |
5669 | break; |
5670 | } | |
5671 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5672 | { | |
5673 | c_parser_error (parser, "expected identifier"); | |
5674 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5675 | expr.value = error_mark_node; | |
27bf414c JM |
5676 | break; |
5677 | } | |
5678 | { | |
5679 | tree id = c_parser_peek_token (parser)->value; | |
5680 | c_parser_consume_token (parser); | |
5681 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5682 | "expected %<)%>"); | |
5683 | expr.value = objc_build_protocol_expr (id); | |
27bf414c JM |
5684 | } |
5685 | break; | |
5686 | case RID_AT_ENCODE: | |
5687 | /* Extension to support C-structures in the archiver. */ | |
5688 | gcc_assert (c_dialect_objc ()); | |
5689 | c_parser_consume_token (parser); | |
5690 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5691 | { | |
5692 | expr.value = error_mark_node; | |
27bf414c JM |
5693 | break; |
5694 | } | |
5695 | t1 = c_parser_type_name (parser); | |
5696 | if (t1 == NULL) | |
5697 | { | |
5698 | expr.value = error_mark_node; | |
27bf414c JM |
5699 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
5700 | break; | |
5701 | } | |
5702 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5703 | "expected %<)%>"); | |
5704 | { | |
928c19bb | 5705 | tree type = groktypename (t1, NULL, NULL); |
27bf414c | 5706 | expr.value = objc_build_encode_expr (type); |
27bf414c JM |
5707 | } |
5708 | break; | |
5709 | default: | |
5710 | c_parser_error (parser, "expected expression"); | |
5711 | expr.value = error_mark_node; | |
27bf414c JM |
5712 | break; |
5713 | } | |
5714 | break; | |
5715 | case CPP_OPEN_SQUARE: | |
5716 | if (c_dialect_objc ()) | |
5717 | { | |
5718 | tree receiver, args; | |
5719 | c_parser_consume_token (parser); | |
5720 | receiver = c_parser_objc_receiver (parser); | |
5721 | args = c_parser_objc_message_args (parser); | |
5722 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5723 | "expected %<]%>"); | |
5724 | expr.value = objc_build_message_expr (build_tree_list (receiver, | |
5725 | args)); | |
27bf414c JM |
5726 | break; |
5727 | } | |
5728 | /* Else fall through to report error. */ | |
5729 | default: | |
5730 | c_parser_error (parser, "expected expression"); | |
5731 | expr.value = error_mark_node; | |
27bf414c JM |
5732 | break; |
5733 | } | |
c2255bc4 | 5734 | return c_parser_postfix_expression_after_primary (parser, loc, expr); |
27bf414c JM |
5735 | } |
5736 | ||
5737 | /* Parse a postfix expression after a parenthesized type name: the | |
5738 | brace-enclosed initializer of a compound literal, possibly followed | |
5739 | by some postfix operators. This is separate because it is not | |
5740 | possible to tell until after the type name whether a cast | |
5741 | expression has a cast or a compound literal, or whether the operand | |
5742 | of sizeof is a parenthesized type name or starts with a compound | |
24b97832 ILT |
5743 | literal. TYPE_LOC is the location where TYPE_NAME starts--the |
5744 | location of the first token after the parentheses around the type | |
5745 | name. */ | |
27bf414c JM |
5746 | |
5747 | static struct c_expr | |
5748 | c_parser_postfix_expression_after_paren_type (c_parser *parser, | |
24b97832 ILT |
5749 | struct c_type_name *type_name, |
5750 | location_t type_loc) | |
27bf414c JM |
5751 | { |
5752 | tree type; | |
5753 | struct c_expr init; | |
928c19bb | 5754 | bool non_const; |
27bf414c | 5755 | struct c_expr expr; |
c7412148 | 5756 | location_t start_loc; |
928c19bb JM |
5757 | tree type_expr = NULL_TREE; |
5758 | bool type_expr_const = true; | |
c2255bc4 | 5759 | check_compound_literal_type (type_loc, type_name); |
27bf414c | 5760 | start_init (NULL_TREE, NULL, 0); |
928c19bb | 5761 | type = groktypename (type_name, &type_expr, &type_expr_const); |
c7412148 | 5762 | start_loc = c_parser_peek_token (parser)->location; |
85cad37c | 5763 | if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type)) |
27bf414c | 5764 | { |
24b97832 | 5765 | error_at (type_loc, "compound literal has variable size"); |
27bf414c JM |
5766 | type = error_mark_node; |
5767 | } | |
5768 | init = c_parser_braced_init (parser, type, false); | |
5769 | finish_init (); | |
5770 | maybe_warn_string_init (type, init); | |
5771 | ||
fcf73884 | 5772 | if (!flag_isoc99) |
509c9d60 | 5773 | pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals"); |
928c19bb JM |
5774 | non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR) |
5775 | ? CONSTRUCTOR_NON_CONST (init.value) | |
5776 | : init.original_code == C_MAYBE_CONST_EXPR); | |
5777 | non_const |= !type_expr_const; | |
c2255bc4 | 5778 | expr.value = build_compound_literal (start_loc, type, init.value, non_const); |
27bf414c | 5779 | expr.original_code = ERROR_MARK; |
6866c6e8 | 5780 | expr.original_type = NULL; |
928c19bb JM |
5781 | if (type_expr) |
5782 | { | |
5783 | if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR) | |
5784 | { | |
5785 | gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE); | |
5786 | C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr; | |
5787 | } | |
5788 | else | |
5789 | { | |
5790 | gcc_assert (!non_const); | |
5791 | expr.value = build2 (C_MAYBE_CONST_EXPR, type, | |
5792 | type_expr, expr.value); | |
5793 | } | |
5794 | } | |
c2255bc4 | 5795 | return c_parser_postfix_expression_after_primary (parser, start_loc, expr); |
27bf414c JM |
5796 | } |
5797 | ||
5798 | /* Parse a postfix expression after the initial primary or compound | |
c2255bc4 AH |
5799 | literal; that is, parse a series of postfix operators. |
5800 | ||
5801 | EXPR_LOC is the location of the primary expression. */ | |
27bf414c JM |
5802 | |
5803 | static struct c_expr | |
5804 | c_parser_postfix_expression_after_primary (c_parser *parser, | |
c2255bc4 | 5805 | location_t expr_loc, |
27bf414c JM |
5806 | struct c_expr expr) |
5807 | { | |
928c19bb | 5808 | struct c_expr orig_expr; |
bbbbb16a ILT |
5809 | tree ident, idx; |
5810 | VEC(tree,gc) *exprlist; | |
5811 | VEC(tree,gc) *origtypes; | |
27bf414c JM |
5812 | while (true) |
5813 | { | |
c2255bc4 | 5814 | location_t op_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5815 | switch (c_parser_peek_token (parser)->type) |
5816 | { | |
5817 | case CPP_OPEN_SQUARE: | |
5818 | /* Array reference. */ | |
5819 | c_parser_consume_token (parser); | |
5820 | idx = c_parser_expression (parser).value; | |
5821 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5822 | "expected %<]%>"); | |
c2255bc4 | 5823 | expr.value = build_array_ref (op_loc, expr.value, idx); |
27bf414c | 5824 | expr.original_code = ERROR_MARK; |
6866c6e8 | 5825 | expr.original_type = NULL; |
27bf414c JM |
5826 | break; |
5827 | case CPP_OPEN_PAREN: | |
5828 | /* Function call. */ | |
5829 | c_parser_consume_token (parser); | |
5830 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
bbbbb16a | 5831 | exprlist = NULL; |
27bf414c | 5832 | else |
bbbbb16a | 5833 | exprlist = c_parser_expr_list (parser, true, false, &origtypes); |
27bf414c JM |
5834 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
5835 | "expected %<)%>"); | |
928c19bb | 5836 | orig_expr = expr; |
c2255bc4 AH |
5837 | /* FIXME diagnostics: Ideally we want the FUNCNAME, not the |
5838 | "(" after the FUNCNAME, which is what we have now. */ | |
5839 | expr.value = build_function_call_vec (op_loc, expr.value, exprlist, | |
bbbbb16a | 5840 | origtypes); |
27bf414c | 5841 | expr.original_code = ERROR_MARK; |
928c19bb JM |
5842 | if (TREE_CODE (expr.value) == INTEGER_CST |
5843 | && TREE_CODE (orig_expr.value) == FUNCTION_DECL | |
5844 | && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL | |
5845 | && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P) | |
5846 | expr.original_code = C_MAYBE_CONST_EXPR; | |
6866c6e8 | 5847 | expr.original_type = NULL; |
bbbbb16a ILT |
5848 | if (exprlist != NULL) |
5849 | { | |
c166b898 ILT |
5850 | release_tree_vector (exprlist); |
5851 | release_tree_vector (origtypes); | |
bbbbb16a | 5852 | } |
27bf414c JM |
5853 | break; |
5854 | case CPP_DOT: | |
5855 | /* Structure element reference. */ | |
5856 | c_parser_consume_token (parser); | |
c2255bc4 | 5857 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
5858 | if (c_parser_next_token_is (parser, CPP_NAME)) |
5859 | ident = c_parser_peek_token (parser)->value; | |
5860 | else | |
5861 | { | |
5862 | c_parser_error (parser, "expected identifier"); | |
5863 | expr.value = error_mark_node; | |
5864 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 5865 | expr.original_type = NULL; |
27bf414c JM |
5866 | return expr; |
5867 | } | |
5868 | c_parser_consume_token (parser); | |
c2255bc4 | 5869 | expr.value = build_component_ref (op_loc, expr.value, ident); |
27bf414c | 5870 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
5871 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
5872 | expr.original_type = NULL; | |
5873 | else | |
5874 | { | |
5875 | /* Remember the original type of a bitfield. */ | |
5876 | tree field = TREE_OPERAND (expr.value, 1); | |
5877 | if (TREE_CODE (field) != FIELD_DECL) | |
5878 | expr.original_type = NULL; | |
5879 | else | |
5880 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
5881 | } | |
27bf414c JM |
5882 | break; |
5883 | case CPP_DEREF: | |
5884 | /* Structure element reference. */ | |
5885 | c_parser_consume_token (parser); | |
c2255bc4 | 5886 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
5887 | if (c_parser_next_token_is (parser, CPP_NAME)) |
5888 | ident = c_parser_peek_token (parser)->value; | |
5889 | else | |
5890 | { | |
5891 | c_parser_error (parser, "expected identifier"); | |
5892 | expr.value = error_mark_node; | |
5893 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 5894 | expr.original_type = NULL; |
27bf414c JM |
5895 | return expr; |
5896 | } | |
5897 | c_parser_consume_token (parser); | |
c2255bc4 AH |
5898 | expr.value = build_component_ref (op_loc, |
5899 | build_indirect_ref (op_loc, | |
c9f9eb5d AH |
5900 | expr.value, |
5901 | "->"), | |
6a3799eb | 5902 | ident); |
27bf414c | 5903 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
5904 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
5905 | expr.original_type = NULL; | |
5906 | else | |
5907 | { | |
5908 | /* Remember the original type of a bitfield. */ | |
5909 | tree field = TREE_OPERAND (expr.value, 1); | |
5910 | if (TREE_CODE (field) != FIELD_DECL) | |
5911 | expr.original_type = NULL; | |
5912 | else | |
5913 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
5914 | } | |
27bf414c JM |
5915 | break; |
5916 | case CPP_PLUS_PLUS: | |
5917 | /* Postincrement. */ | |
5918 | c_parser_consume_token (parser); | |
c2255bc4 AH |
5919 | expr = default_function_array_conversion (expr_loc, expr); |
5920 | expr.value = build_unary_op (op_loc, | |
c9f9eb5d | 5921 | POSTINCREMENT_EXPR, expr.value, 0); |
27bf414c | 5922 | expr.original_code = ERROR_MARK; |
6866c6e8 | 5923 | expr.original_type = NULL; |
27bf414c JM |
5924 | break; |
5925 | case CPP_MINUS_MINUS: | |
5926 | /* Postdecrement. */ | |
5927 | c_parser_consume_token (parser); | |
c2255bc4 AH |
5928 | expr = default_function_array_conversion (expr_loc, expr); |
5929 | expr.value = build_unary_op (op_loc, | |
c9f9eb5d | 5930 | POSTDECREMENT_EXPR, expr.value, 0); |
27bf414c | 5931 | expr.original_code = ERROR_MARK; |
6866c6e8 | 5932 | expr.original_type = NULL; |
27bf414c JM |
5933 | break; |
5934 | default: | |
5935 | return expr; | |
5936 | } | |
5937 | } | |
5938 | } | |
5939 | ||
5940 | /* Parse an expression (C90 6.3.17, C99 6.5.17). | |
5941 | ||
5942 | expression: | |
5943 | assignment-expression | |
5944 | expression , assignment-expression | |
5945 | */ | |
5946 | ||
5947 | static struct c_expr | |
5948 | c_parser_expression (c_parser *parser) | |
5949 | { | |
5950 | struct c_expr expr; | |
5951 | expr = c_parser_expr_no_commas (parser, NULL); | |
5952 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
5953 | { | |
5954 | struct c_expr next; | |
c2255bc4 AH |
5955 | location_t loc = c_parser_peek_token (parser)->location; |
5956 | location_t expr_loc; | |
27bf414c | 5957 | c_parser_consume_token (parser); |
c2255bc4 | 5958 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c | 5959 | next = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 AH |
5960 | next = default_function_array_conversion (expr_loc, next); |
5961 | expr.value = build_compound_expr (loc, expr.value, next.value); | |
27bf414c | 5962 | expr.original_code = COMPOUND_EXPR; |
81f40b79 | 5963 | expr.original_type = next.original_type; |
27bf414c JM |
5964 | } |
5965 | return expr; | |
5966 | } | |
5967 | ||
46bdb9cf JM |
5968 | /* Parse an expression and convert functions or arrays to |
5969 | pointers. */ | |
5970 | ||
5971 | static struct c_expr | |
5972 | c_parser_expression_conv (c_parser *parser) | |
5973 | { | |
5974 | struct c_expr expr; | |
c2255bc4 | 5975 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5976 | expr = c_parser_expression (parser); |
c2255bc4 | 5977 | expr = default_function_array_conversion (loc, expr); |
46bdb9cf JM |
5978 | return expr; |
5979 | } | |
5980 | ||
5981 | /* Parse a non-empty list of expressions. If CONVERT_P, convert | |
928c19bb | 5982 | functions and arrays to pointers. If FOLD_P, fold the expressions. |
27bf414c JM |
5983 | |
5984 | nonempty-expr-list: | |
5985 | assignment-expression | |
5986 | nonempty-expr-list , assignment-expression | |
5987 | */ | |
5988 | ||
bbbbb16a ILT |
5989 | static VEC(tree,gc) * |
5990 | c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p, | |
5991 | VEC(tree,gc) **p_orig_types) | |
27bf414c | 5992 | { |
bbbbb16a ILT |
5993 | VEC(tree,gc) *ret; |
5994 | VEC(tree,gc) *orig_types; | |
27bf414c | 5995 | struct c_expr expr; |
c2255bc4 | 5996 | location_t loc = c_parser_peek_token (parser)->location; |
bbbbb16a | 5997 | |
c166b898 | 5998 | ret = make_tree_vector (); |
bbbbb16a ILT |
5999 | if (p_orig_types == NULL) |
6000 | orig_types = NULL; | |
6001 | else | |
c166b898 | 6002 | orig_types = make_tree_vector (); |
bbbbb16a | 6003 | |
27bf414c | 6004 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 6005 | if (convert_p) |
c2255bc4 | 6006 | expr = default_function_array_conversion (loc, expr); |
928c19bb JM |
6007 | if (fold_p) |
6008 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
6009 | VEC_quick_push (tree, ret, expr.value); |
6010 | if (orig_types != NULL) | |
6011 | VEC_quick_push (tree, orig_types, expr.original_type); | |
27bf414c JM |
6012 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
6013 | { | |
6014 | c_parser_consume_token (parser); | |
c2255bc4 | 6015 | loc = c_parser_peek_token (parser)->location; |
27bf414c | 6016 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 6017 | if (convert_p) |
c2255bc4 | 6018 | expr = default_function_array_conversion (loc, expr); |
928c19bb JM |
6019 | if (fold_p) |
6020 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
6021 | VEC_safe_push (tree, gc, ret, expr.value); |
6022 | if (orig_types != NULL) | |
6023 | VEC_safe_push (tree, gc, orig_types, expr.original_type); | |
27bf414c | 6024 | } |
bbbbb16a ILT |
6025 | if (orig_types != NULL) |
6026 | *p_orig_types = orig_types; | |
27bf414c JM |
6027 | return ret; |
6028 | } | |
27bf414c JM |
6029 | \f |
6030 | /* Parse Objective-C-specific constructs. */ | |
6031 | ||
6032 | /* Parse an objc-class-definition. | |
6033 | ||
6034 | objc-class-definition: | |
6035 | @interface identifier objc-superclass[opt] objc-protocol-refs[opt] | |
6036 | objc-class-instance-variables[opt] objc-methodprotolist @end | |
6037 | @implementation identifier objc-superclass[opt] | |
6038 | objc-class-instance-variables[opt] | |
6039 | @interface identifier ( identifier ) objc-protocol-refs[opt] | |
6040 | objc-methodprotolist @end | |
6041 | @implementation identifier ( identifier ) | |
6042 | ||
6043 | objc-superclass: | |
6044 | : identifier | |
6045 | ||
6046 | "@interface identifier (" must start "@interface identifier ( | |
6047 | identifier ) ...": objc-methodprotolist in the first production may | |
0fa2e4df | 6048 | not start with a parenthesized identifier as a declarator of a data |
27bf414c JM |
6049 | definition with no declaration specifiers if the objc-superclass, |
6050 | objc-protocol-refs and objc-class-instance-variables are omitted. */ | |
6051 | ||
6052 | static void | |
6053 | c_parser_objc_class_definition (c_parser *parser) | |
6054 | { | |
6055 | bool iface_p; | |
6056 | tree id1; | |
6057 | tree superclass; | |
6058 | if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE)) | |
6059 | iface_p = true; | |
6060 | else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION)) | |
6061 | iface_p = false; | |
6062 | else | |
6063 | gcc_unreachable (); | |
6064 | c_parser_consume_token (parser); | |
6065 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6066 | { | |
6067 | c_parser_error (parser, "expected identifier"); | |
6068 | return; | |
6069 | } | |
6070 | id1 = c_parser_peek_token (parser)->value; | |
6071 | c_parser_consume_token (parser); | |
6072 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6073 | { | |
6074 | tree id2; | |
6075 | tree proto = NULL_TREE; | |
6076 | c_parser_consume_token (parser); | |
6077 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6078 | { | |
6079 | c_parser_error (parser, "expected identifier"); | |
6080 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6081 | return; | |
6082 | } | |
6083 | id2 = c_parser_peek_token (parser)->value; | |
6084 | c_parser_consume_token (parser); | |
6085 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6086 | if (!iface_p) | |
6087 | { | |
6088 | objc_start_category_implementation (id1, id2); | |
6089 | return; | |
6090 | } | |
6091 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6092 | proto = c_parser_objc_protocol_refs (parser); | |
6093 | objc_start_category_interface (id1, id2, proto); | |
6094 | c_parser_objc_methodprotolist (parser); | |
6095 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
6096 | objc_finish_interface (); | |
6097 | return; | |
6098 | } | |
6099 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
6100 | { | |
6101 | c_parser_consume_token (parser); | |
6102 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6103 | { | |
6104 | c_parser_error (parser, "expected identifier"); | |
6105 | return; | |
6106 | } | |
6107 | superclass = c_parser_peek_token (parser)->value; | |
6108 | c_parser_consume_token (parser); | |
6109 | } | |
6110 | else | |
6111 | superclass = NULL_TREE; | |
6112 | if (iface_p) | |
6113 | { | |
6114 | tree proto = NULL_TREE; | |
6115 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6116 | proto = c_parser_objc_protocol_refs (parser); | |
6117 | objc_start_class_interface (id1, superclass, proto); | |
6118 | } | |
6119 | else | |
6120 | objc_start_class_implementation (id1, superclass); | |
6121 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
6122 | c_parser_objc_class_instance_variables (parser); | |
6123 | if (iface_p) | |
6124 | { | |
6125 | objc_continue_interface (); | |
6126 | c_parser_objc_methodprotolist (parser); | |
6127 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
6128 | objc_finish_interface (); | |
6129 | } | |
6130 | else | |
6131 | { | |
6132 | objc_continue_implementation (); | |
6133 | return; | |
6134 | } | |
6135 | } | |
6136 | ||
6137 | /* Parse objc-class-instance-variables. | |
6138 | ||
6139 | objc-class-instance-variables: | |
6140 | { objc-instance-variable-decl-list[opt] } | |
6141 | ||
6142 | objc-instance-variable-decl-list: | |
6143 | objc-visibility-spec | |
6144 | objc-instance-variable-decl ; | |
6145 | ; | |
6146 | objc-instance-variable-decl-list objc-visibility-spec | |
6147 | objc-instance-variable-decl-list objc-instance-variable-decl ; | |
6148 | objc-instance-variable-decl-list ; | |
6149 | ||
6150 | objc-visibility-spec: | |
6151 | @private | |
6152 | @protected | |
6153 | @public | |
6154 | ||
6155 | objc-instance-variable-decl: | |
6156 | struct-declaration | |
6157 | */ | |
6158 | ||
6159 | static void | |
6160 | c_parser_objc_class_instance_variables (c_parser *parser) | |
6161 | { | |
6162 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); | |
6163 | c_parser_consume_token (parser); | |
6164 | while (c_parser_next_token_is_not (parser, CPP_EOF)) | |
6165 | { | |
6166 | tree decls; | |
6167 | /* Parse any stray semicolon. */ | |
6168 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
6169 | { | |
509c9d60 MLI |
6170 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
6171 | "extra semicolon in struct or union specified"); | |
27bf414c JM |
6172 | c_parser_consume_token (parser); |
6173 | continue; | |
6174 | } | |
6175 | /* Stop if at the end of the instance variables. */ | |
6176 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
6177 | { | |
6178 | c_parser_consume_token (parser); | |
6179 | break; | |
6180 | } | |
6181 | /* Parse any objc-visibility-spec. */ | |
eea1139b | 6182 | if (c_parser_next_token_is_keyword (parser, RID_PRIVATE)) |
27bf414c JM |
6183 | { |
6184 | c_parser_consume_token (parser); | |
6185 | objc_set_visibility (2); | |
6186 | continue; | |
6187 | } | |
eea1139b | 6188 | else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED)) |
27bf414c JM |
6189 | { |
6190 | c_parser_consume_token (parser); | |
6191 | objc_set_visibility (0); | |
6192 | continue; | |
6193 | } | |
eea1139b | 6194 | else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC)) |
27bf414c JM |
6195 | { |
6196 | c_parser_consume_token (parser); | |
6197 | objc_set_visibility (1); | |
6198 | continue; | |
6199 | } | |
bc4071dd RH |
6200 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
6201 | { | |
6202 | c_parser_pragma (parser, pragma_external); | |
6203 | continue; | |
6204 | } | |
6205 | ||
27bf414c JM |
6206 | /* Parse some comma-separated declarations. */ |
6207 | decls = c_parser_struct_declaration (parser); | |
6208 | { | |
6209 | /* Comma-separated instance variables are chained together in | |
6210 | reverse order; add them one by one. */ | |
6211 | tree ivar = nreverse (decls); | |
6212 | for (; ivar; ivar = TREE_CHAIN (ivar)) | |
6213 | objc_add_instance_variable (copy_node (ivar)); | |
6214 | } | |
6215 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6216 | } | |
6217 | } | |
6218 | ||
6219 | /* Parse an objc-class-declaration. | |
6220 | ||
6221 | objc-class-declaration: | |
6222 | @class identifier-list ; | |
6223 | */ | |
6224 | ||
6225 | static void | |
6226 | c_parser_objc_class_declaration (c_parser *parser) | |
6227 | { | |
6228 | tree list = NULL_TREE; | |
eea1139b | 6229 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS)); |
27bf414c JM |
6230 | c_parser_consume_token (parser); |
6231 | /* Any identifiers, including those declared as type names, are OK | |
6232 | here. */ | |
6233 | while (true) | |
6234 | { | |
6235 | tree id; | |
6236 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6237 | { | |
6238 | c_parser_error (parser, "expected identifier"); | |
6239 | break; | |
6240 | } | |
6241 | id = c_parser_peek_token (parser)->value; | |
6242 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6243 | c_parser_consume_token (parser); | |
6244 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6245 | c_parser_consume_token (parser); | |
6246 | else | |
6247 | break; | |
6248 | } | |
6249 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6250 | objc_declare_class (list); | |
6251 | } | |
6252 | ||
6253 | /* Parse an objc-alias-declaration. | |
6254 | ||
6255 | objc-alias-declaration: | |
6256 | @compatibility_alias identifier identifier ; | |
6257 | */ | |
6258 | ||
6259 | static void | |
6260 | c_parser_objc_alias_declaration (c_parser *parser) | |
6261 | { | |
6262 | tree id1, id2; | |
6263 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS)); | |
6264 | c_parser_consume_token (parser); | |
6265 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6266 | { | |
6267 | c_parser_error (parser, "expected identifier"); | |
6268 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
6269 | return; | |
6270 | } | |
6271 | id1 = c_parser_peek_token (parser)->value; | |
6272 | c_parser_consume_token (parser); | |
6273 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6274 | { | |
6275 | c_parser_error (parser, "expected identifier"); | |
6276 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
6277 | return; | |
6278 | } | |
6279 | id2 = c_parser_peek_token (parser)->value; | |
6280 | c_parser_consume_token (parser); | |
6281 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6282 | objc_declare_alias (id1, id2); | |
6283 | } | |
6284 | ||
6285 | /* Parse an objc-protocol-definition. | |
6286 | ||
6287 | objc-protocol-definition: | |
6288 | @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end | |
6289 | @protocol identifier-list ; | |
6290 | ||
6291 | "@protocol identifier ;" should be resolved as "@protocol | |
6292 | identifier-list ;": objc-methodprotolist may not start with a | |
6293 | semicolon in the first alternative if objc-protocol-refs are | |
6294 | omitted. */ | |
6295 | ||
6296 | static void | |
6297 | c_parser_objc_protocol_definition (c_parser *parser) | |
6298 | { | |
6299 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL)); | |
6300 | c_parser_consume_token (parser); | |
6301 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6302 | { | |
6303 | c_parser_error (parser, "expected identifier"); | |
6304 | return; | |
6305 | } | |
6306 | if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA | |
6307 | || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON) | |
6308 | { | |
6309 | tree list = NULL_TREE; | |
6310 | /* Any identifiers, including those declared as type names, are | |
6311 | OK here. */ | |
6312 | while (true) | |
6313 | { | |
6314 | tree id; | |
6315 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6316 | { | |
6317 | c_parser_error (parser, "expected identifier"); | |
6318 | break; | |
6319 | } | |
6320 | id = c_parser_peek_token (parser)->value; | |
6321 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6322 | c_parser_consume_token (parser); | |
6323 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6324 | c_parser_consume_token (parser); | |
6325 | else | |
6326 | break; | |
6327 | } | |
6328 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6329 | objc_declare_protocols (list); | |
6330 | } | |
6331 | else | |
6332 | { | |
6333 | tree id = c_parser_peek_token (parser)->value; | |
6334 | tree proto = NULL_TREE; | |
6335 | c_parser_consume_token (parser); | |
6336 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
6337 | proto = c_parser_objc_protocol_refs (parser); | |
0bacb8c7 | 6338 | parser->objc_pq_context = true; |
27bf414c JM |
6339 | objc_start_protocol (id, proto); |
6340 | c_parser_objc_methodprotolist (parser); | |
6341 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
0bacb8c7 | 6342 | parser->objc_pq_context = false; |
27bf414c JM |
6343 | objc_finish_interface (); |
6344 | } | |
6345 | } | |
6346 | ||
6347 | /* Parse an objc-method-type. | |
6348 | ||
6349 | objc-method-type: | |
6350 | + | |
6351 | - | |
6352 | */ | |
6353 | ||
6354 | static enum tree_code | |
6355 | c_parser_objc_method_type (c_parser *parser) | |
6356 | { | |
6357 | switch (c_parser_peek_token (parser)->type) | |
6358 | { | |
6359 | case CPP_PLUS: | |
6360 | c_parser_consume_token (parser); | |
6361 | return PLUS_EXPR; | |
6362 | case CPP_MINUS: | |
6363 | c_parser_consume_token (parser); | |
6364 | return MINUS_EXPR; | |
6365 | default: | |
6366 | gcc_unreachable (); | |
6367 | } | |
6368 | } | |
6369 | ||
6370 | /* Parse an objc-method-definition. | |
6371 | ||
6372 | objc-method-definition: | |
6373 | objc-method-type objc-method-decl ;[opt] compound-statement | |
6374 | */ | |
6375 | ||
6376 | static void | |
6377 | c_parser_objc_method_definition (c_parser *parser) | |
6378 | { | |
6379 | enum tree_code type = c_parser_objc_method_type (parser); | |
6380 | tree decl; | |
6381 | objc_set_method_type (type); | |
0bacb8c7 | 6382 | parser->objc_pq_context = true; |
27bf414c JM |
6383 | decl = c_parser_objc_method_decl (parser); |
6384 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
6385 | { | |
6386 | c_parser_consume_token (parser); | |
509c9d60 MLI |
6387 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
6388 | "extra semicolon in method definition specified"); | |
27bf414c | 6389 | } |
8f078c08 AP |
6390 | if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
6391 | { | |
6392 | c_parser_error (parser, "expected %<{%>"); | |
6393 | return; | |
6394 | } | |
0bacb8c7 | 6395 | parser->objc_pq_context = false; |
27bf414c JM |
6396 | objc_start_method_definition (decl); |
6397 | add_stmt (c_parser_compound_statement (parser)); | |
6398 | objc_finish_method_definition (current_function_decl); | |
6399 | } | |
6400 | ||
6401 | /* Parse an objc-methodprotolist. | |
6402 | ||
6403 | objc-methodprotolist: | |
6404 | empty | |
6405 | objc-methodprotolist objc-methodproto | |
6406 | objc-methodprotolist declaration | |
6407 | objc-methodprotolist ; | |
6408 | ||
6409 | The declaration is a data definition, which may be missing | |
6410 | declaration specifiers under the same rules and diagnostics as | |
6411 | other data definitions outside functions, and the stray semicolon | |
6412 | is diagnosed the same way as a stray semicolon outside a | |
6413 | function. */ | |
6414 | ||
6415 | static void | |
6416 | c_parser_objc_methodprotolist (c_parser *parser) | |
6417 | { | |
6418 | while (true) | |
6419 | { | |
6420 | /* The list is terminated by @end. */ | |
6421 | switch (c_parser_peek_token (parser)->type) | |
6422 | { | |
6423 | case CPP_SEMICOLON: | |
509c9d60 MLI |
6424 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
6425 | "ISO C does not allow extra %<;%> outside of a function"); | |
27bf414c JM |
6426 | c_parser_consume_token (parser); |
6427 | break; | |
6428 | case CPP_PLUS: | |
6429 | case CPP_MINUS: | |
6430 | c_parser_objc_methodproto (parser); | |
6431 | break; | |
b9b58168 RH |
6432 | case CPP_PRAGMA: |
6433 | c_parser_pragma (parser, pragma_external); | |
6434 | break; | |
27bf414c JM |
6435 | case CPP_EOF: |
6436 | return; | |
6437 | default: | |
6438 | if (c_parser_next_token_is_keyword (parser, RID_AT_END)) | |
6439 | return; | |
6440 | c_parser_declaration_or_fndef (parser, false, true, false, true); | |
6441 | break; | |
6442 | } | |
6443 | } | |
6444 | } | |
6445 | ||
6446 | /* Parse an objc-methodproto. | |
6447 | ||
6448 | objc-methodproto: | |
6449 | objc-method-type objc-method-decl ; | |
6450 | */ | |
6451 | ||
6452 | static void | |
6453 | c_parser_objc_methodproto (c_parser *parser) | |
6454 | { | |
6455 | enum tree_code type = c_parser_objc_method_type (parser); | |
6456 | tree decl; | |
6457 | objc_set_method_type (type); | |
6458 | /* Remember protocol qualifiers in prototypes. */ | |
0bacb8c7 | 6459 | parser->objc_pq_context = true; |
27bf414c JM |
6460 | decl = c_parser_objc_method_decl (parser); |
6461 | /* Forget protocol qualifiers here. */ | |
0bacb8c7 | 6462 | parser->objc_pq_context = false; |
27bf414c JM |
6463 | objc_add_method_declaration (decl); |
6464 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6465 | } | |
6466 | ||
6467 | /* Parse an objc-method-decl. | |
6468 | ||
6469 | objc-method-decl: | |
6470 | ( objc-type-name ) objc-selector | |
6471 | objc-selector | |
6472 | ( objc-type-name ) objc-keyword-selector objc-optparmlist | |
6473 | objc-keyword-selector objc-optparmlist | |
6474 | ||
6475 | objc-keyword-selector: | |
6476 | objc-keyword-decl | |
6477 | objc-keyword-selector objc-keyword-decl | |
6478 | ||
6479 | objc-keyword-decl: | |
6480 | objc-selector : ( objc-type-name ) identifier | |
6481 | objc-selector : identifier | |
6482 | : ( objc-type-name ) identifier | |
6483 | : identifier | |
6484 | ||
6485 | objc-optparmlist: | |
6486 | objc-optparms objc-optellipsis | |
6487 | ||
6488 | objc-optparms: | |
6489 | empty | |
6490 | objc-opt-parms , parameter-declaration | |
6491 | ||
6492 | objc-optellipsis: | |
6493 | empty | |
6494 | , ... | |
6495 | */ | |
6496 | ||
6497 | static tree | |
6498 | c_parser_objc_method_decl (c_parser *parser) | |
6499 | { | |
6500 | tree type = NULL_TREE; | |
6501 | tree sel; | |
6502 | tree parms = NULL_TREE; | |
dbb74365 RS |
6503 | bool ellipsis = false; |
6504 | ||
27bf414c JM |
6505 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
6506 | { | |
6507 | c_parser_consume_token (parser); | |
6508 | type = c_parser_objc_type_name (parser); | |
6509 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6510 | } | |
6511 | sel = c_parser_objc_selector (parser); | |
6512 | /* If there is no selector, or a colon follows, we have an | |
6513 | objc-keyword-selector. If there is a selector, and a colon does | |
6514 | not follow, that selector ends the objc-method-decl. */ | |
6515 | if (!sel || c_parser_next_token_is (parser, CPP_COLON)) | |
6516 | { | |
6517 | tree tsel = sel; | |
6518 | tree list = NULL_TREE; | |
27bf414c JM |
6519 | while (true) |
6520 | { | |
6521 | tree atype = NULL_TREE, id, keyworddecl; | |
6522 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6523 | break; | |
6524 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6525 | { | |
6526 | c_parser_consume_token (parser); | |
6527 | atype = c_parser_objc_type_name (parser); | |
6528 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6529 | "expected %<)%>"); | |
6530 | } | |
6531 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6532 | { | |
6533 | c_parser_error (parser, "expected identifier"); | |
6534 | return error_mark_node; | |
6535 | } | |
6536 | id = c_parser_peek_token (parser)->value; | |
6537 | c_parser_consume_token (parser); | |
6538 | keyworddecl = objc_build_keyword_decl (tsel, atype, id); | |
6539 | list = chainon (list, keyworddecl); | |
6540 | tsel = c_parser_objc_selector (parser); | |
6541 | if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6542 | break; | |
6543 | } | |
6544 | /* Parse the optional parameter list. Optional Objective-C | |
6545 | method parameters follow the C syntax, and may include '...' | |
6546 | to denote a variable number of arguments. */ | |
6547 | parms = make_node (TREE_LIST); | |
27bf414c JM |
6548 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
6549 | { | |
6550 | struct c_parm *parm; | |
6551 | c_parser_consume_token (parser); | |
6552 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
6553 | { | |
6554 | ellipsis = true; | |
6555 | c_parser_consume_token (parser); | |
6556 | break; | |
6557 | } | |
6558 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6559 | if (parm == NULL) | |
6560 | break; | |
6561 | parms = chainon (parms, | |
6562 | build_tree_list (NULL_TREE, grokparm (parm))); | |
6563 | } | |
27bf414c JM |
6564 | sel = list; |
6565 | } | |
dbb74365 | 6566 | return objc_build_method_signature (type, sel, parms, ellipsis); |
27bf414c JM |
6567 | } |
6568 | ||
6569 | /* Parse an objc-type-name. | |
6570 | ||
6571 | objc-type-name: | |
6572 | objc-type-qualifiers[opt] type-name | |
6573 | objc-type-qualifiers[opt] | |
6574 | ||
6575 | objc-type-qualifiers: | |
6576 | objc-type-qualifier | |
6577 | objc-type-qualifiers objc-type-qualifier | |
6578 | ||
6579 | objc-type-qualifier: one of | |
6580 | in out inout bycopy byref oneway | |
6581 | */ | |
6582 | ||
6583 | static tree | |
6584 | c_parser_objc_type_name (c_parser *parser) | |
6585 | { | |
6586 | tree quals = NULL_TREE; | |
d75d71e0 | 6587 | struct c_type_name *type_name = NULL; |
27bf414c JM |
6588 | tree type = NULL_TREE; |
6589 | while (true) | |
6590 | { | |
6591 | c_token *token = c_parser_peek_token (parser); | |
6592 | if (token->type == CPP_KEYWORD | |
6593 | && (token->keyword == RID_IN | |
6594 | || token->keyword == RID_OUT | |
6595 | || token->keyword == RID_INOUT | |
6596 | || token->keyword == RID_BYCOPY | |
6597 | || token->keyword == RID_BYREF | |
6598 | || token->keyword == RID_ONEWAY)) | |
6599 | { | |
6600 | quals = chainon (quals, build_tree_list (NULL_TREE, token->value)); | |
6601 | c_parser_consume_token (parser); | |
6602 | } | |
6603 | else | |
6604 | break; | |
6605 | } | |
6606 | if (c_parser_next_token_starts_typename (parser)) | |
d75d71e0 ILT |
6607 | type_name = c_parser_type_name (parser); |
6608 | if (type_name) | |
928c19bb | 6609 | type = groktypename (type_name, NULL, NULL); |
27bf414c JM |
6610 | return build_tree_list (quals, type); |
6611 | } | |
6612 | ||
6613 | /* Parse objc-protocol-refs. | |
6614 | ||
6615 | objc-protocol-refs: | |
6616 | < identifier-list > | |
6617 | */ | |
6618 | ||
6619 | static tree | |
6620 | c_parser_objc_protocol_refs (c_parser *parser) | |
6621 | { | |
6622 | tree list = NULL_TREE; | |
6623 | gcc_assert (c_parser_next_token_is (parser, CPP_LESS)); | |
6624 | c_parser_consume_token (parser); | |
6625 | /* Any identifiers, including those declared as type names, are OK | |
6626 | here. */ | |
6627 | while (true) | |
6628 | { | |
6629 | tree id; | |
6630 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6631 | { | |
6632 | c_parser_error (parser, "expected identifier"); | |
6633 | break; | |
6634 | } | |
6635 | id = c_parser_peek_token (parser)->value; | |
6636 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6637 | c_parser_consume_token (parser); | |
6638 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6639 | c_parser_consume_token (parser); | |
6640 | else | |
6641 | break; | |
6642 | } | |
6643 | c_parser_require (parser, CPP_GREATER, "expected %<>%>"); | |
6644 | return list; | |
6645 | } | |
6646 | ||
6647 | /* Parse an objc-try-catch-statement. | |
6648 | ||
6649 | objc-try-catch-statement: | |
6650 | @try compound-statement objc-catch-list[opt] | |
6651 | @try compound-statement objc-catch-list[opt] @finally compound-statement | |
6652 | ||
6653 | objc-catch-list: | |
6654 | @catch ( parameter-declaration ) compound-statement | |
6655 | objc-catch-list @catch ( parameter-declaration ) compound-statement | |
6656 | */ | |
6657 | ||
6658 | static void | |
6659 | c_parser_objc_try_catch_statement (c_parser *parser) | |
6660 | { | |
6661 | location_t loc; | |
6662 | tree stmt; | |
eea1139b | 6663 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY)); |
27bf414c JM |
6664 | c_parser_consume_token (parser); |
6665 | loc = c_parser_peek_token (parser)->location; | |
6666 | stmt = c_parser_compound_statement (parser); | |
6667 | objc_begin_try_stmt (loc, stmt); | |
eea1139b | 6668 | while (c_parser_next_token_is_keyword (parser, RID_CATCH)) |
27bf414c JM |
6669 | { |
6670 | struct c_parm *parm; | |
6671 | c_parser_consume_token (parser); | |
6672 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6673 | break; | |
6674 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6675 | if (parm == NULL) | |
6676 | { | |
6677 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6678 | break; | |
6679 | } | |
6680 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6681 | objc_begin_catch_clause (grokparm (parm)); | |
6682 | if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) | |
6683 | c_parser_compound_statement_nostart (parser); | |
6684 | objc_finish_catch_clause (); | |
6685 | } | |
6686 | if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY)) | |
6687 | { | |
6688 | location_t finloc; | |
6689 | tree finstmt; | |
6690 | c_parser_consume_token (parser); | |
6691 | finloc = c_parser_peek_token (parser)->location; | |
6692 | finstmt = c_parser_compound_statement (parser); | |
6693 | objc_build_finally_clause (finloc, finstmt); | |
6694 | } | |
6695 | objc_finish_try_stmt (); | |
6696 | } | |
6697 | ||
6698 | /* Parse an objc-synchronized-statement. | |
6699 | ||
6700 | objc-synchronized-statement: | |
6701 | @synchronized ( expression ) compound-statement | |
6702 | */ | |
6703 | ||
6704 | static void | |
6705 | c_parser_objc_synchronized_statement (c_parser *parser) | |
6706 | { | |
6707 | location_t loc; | |
6708 | tree expr, stmt; | |
6709 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED)); | |
6710 | c_parser_consume_token (parser); | |
6711 | loc = c_parser_peek_token (parser)->location; | |
6712 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6713 | { | |
6714 | expr = c_parser_expression (parser).value; | |
928c19bb | 6715 | expr = c_fully_fold (expr, false, NULL); |
27bf414c JM |
6716 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
6717 | } | |
6718 | else | |
6719 | expr = error_mark_node; | |
6720 | stmt = c_parser_compound_statement (parser); | |
6721 | objc_build_synchronized (loc, expr, stmt); | |
6722 | } | |
6723 | ||
6724 | /* Parse an objc-selector; return NULL_TREE without an error if the | |
6725 | next token is not an objc-selector. | |
6726 | ||
6727 | objc-selector: | |
6728 | identifier | |
6729 | one of | |
6730 | enum struct union if else while do for switch case default | |
6731 | break continue return goto asm sizeof typeof __alignof | |
6732 | unsigned long const short volatile signed restrict _Complex | |
6733 | in out inout bycopy byref oneway int char float double void _Bool | |
6734 | ||
6735 | ??? Why this selection of keywords but not, for example, storage | |
6736 | class specifiers? */ | |
6737 | ||
6738 | static tree | |
6739 | c_parser_objc_selector (c_parser *parser) | |
6740 | { | |
6741 | c_token *token = c_parser_peek_token (parser); | |
6742 | tree value = token->value; | |
6743 | if (token->type == CPP_NAME) | |
6744 | { | |
6745 | c_parser_consume_token (parser); | |
6746 | return value; | |
6747 | } | |
6748 | if (token->type != CPP_KEYWORD) | |
6749 | return NULL_TREE; | |
6750 | switch (token->keyword) | |
6751 | { | |
6752 | case RID_ENUM: | |
6753 | case RID_STRUCT: | |
6754 | case RID_UNION: | |
6755 | case RID_IF: | |
6756 | case RID_ELSE: | |
6757 | case RID_WHILE: | |
6758 | case RID_DO: | |
6759 | case RID_FOR: | |
6760 | case RID_SWITCH: | |
6761 | case RID_CASE: | |
6762 | case RID_DEFAULT: | |
6763 | case RID_BREAK: | |
6764 | case RID_CONTINUE: | |
6765 | case RID_RETURN: | |
6766 | case RID_GOTO: | |
6767 | case RID_ASM: | |
6768 | case RID_SIZEOF: | |
6769 | case RID_TYPEOF: | |
6770 | case RID_ALIGNOF: | |
6771 | case RID_UNSIGNED: | |
6772 | case RID_LONG: | |
6773 | case RID_CONST: | |
6774 | case RID_SHORT: | |
6775 | case RID_VOLATILE: | |
6776 | case RID_SIGNED: | |
6777 | case RID_RESTRICT: | |
6778 | case RID_COMPLEX: | |
6779 | case RID_IN: | |
6780 | case RID_OUT: | |
6781 | case RID_INOUT: | |
6782 | case RID_BYCOPY: | |
6783 | case RID_BYREF: | |
6784 | case RID_ONEWAY: | |
6785 | case RID_INT: | |
6786 | case RID_CHAR: | |
6787 | case RID_FLOAT: | |
6788 | case RID_DOUBLE: | |
6789 | case RID_VOID: | |
6790 | case RID_BOOL: | |
6791 | c_parser_consume_token (parser); | |
6792 | return value; | |
6793 | default: | |
6794 | return NULL_TREE; | |
6795 | } | |
6796 | } | |
6797 | ||
6798 | /* Parse an objc-selector-arg. | |
6799 | ||
6800 | objc-selector-arg: | |
6801 | objc-selector | |
6802 | objc-keywordname-list | |
6803 | ||
6804 | objc-keywordname-list: | |
6805 | objc-keywordname | |
6806 | objc-keywordname-list objc-keywordname | |
6807 | ||
6808 | objc-keywordname: | |
6809 | objc-selector : | |
6810 | : | |
6811 | */ | |
6812 | ||
6813 | static tree | |
6814 | c_parser_objc_selector_arg (c_parser *parser) | |
6815 | { | |
6816 | tree sel = c_parser_objc_selector (parser); | |
6817 | tree list = NULL_TREE; | |
6818 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6819 | return sel; | |
6820 | while (true) | |
6821 | { | |
6822 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6823 | return list; | |
6824 | list = chainon (list, build_tree_list (sel, NULL_TREE)); | |
6825 | sel = c_parser_objc_selector (parser); | |
6826 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6827 | break; | |
6828 | } | |
6829 | return list; | |
6830 | } | |
6831 | ||
6832 | /* Parse an objc-receiver. | |
6833 | ||
6834 | objc-receiver: | |
6835 | expression | |
6836 | class-name | |
6837 | type-name | |
6838 | */ | |
6839 | ||
6840 | static tree | |
6841 | c_parser_objc_receiver (c_parser *parser) | |
6842 | { | |
6843 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
6844 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME | |
6845 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
6846 | { | |
6847 | tree id = c_parser_peek_token (parser)->value; | |
6848 | c_parser_consume_token (parser); | |
6849 | return objc_get_class_reference (id); | |
6850 | } | |
928c19bb | 6851 | return c_fully_fold (c_parser_expression (parser).value, false, NULL); |
27bf414c JM |
6852 | } |
6853 | ||
6854 | /* Parse objc-message-args. | |
6855 | ||
6856 | objc-message-args: | |
6857 | objc-selector | |
6858 | objc-keywordarg-list | |
6859 | ||
6860 | objc-keywordarg-list: | |
6861 | objc-keywordarg | |
6862 | objc-keywordarg-list objc-keywordarg | |
6863 | ||
6864 | objc-keywordarg: | |
6865 | objc-selector : objc-keywordexpr | |
6866 | : objc-keywordexpr | |
6867 | */ | |
6868 | ||
6869 | static tree | |
6870 | c_parser_objc_message_args (c_parser *parser) | |
6871 | { | |
6872 | tree sel = c_parser_objc_selector (parser); | |
6873 | tree list = NULL_TREE; | |
6874 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6875 | return sel; | |
6876 | while (true) | |
6877 | { | |
6878 | tree keywordexpr; | |
6879 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
0a7d7dea | 6880 | return error_mark_node; |
27bf414c JM |
6881 | keywordexpr = c_parser_objc_keywordexpr (parser); |
6882 | list = chainon (list, build_tree_list (sel, keywordexpr)); | |
6883 | sel = c_parser_objc_selector (parser); | |
6884 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6885 | break; | |
6886 | } | |
6887 | return list; | |
6888 | } | |
6889 | ||
6890 | /* Parse an objc-keywordexpr. | |
6891 | ||
6892 | objc-keywordexpr: | |
6893 | nonempty-expr-list | |
6894 | */ | |
6895 | ||
6896 | static tree | |
6897 | c_parser_objc_keywordexpr (c_parser *parser) | |
6898 | { | |
bbbbb16a ILT |
6899 | tree ret; |
6900 | VEC(tree,gc) *expr_list = c_parser_expr_list (parser, true, true, NULL); | |
6901 | if (VEC_length (tree, expr_list) == 1) | |
27bf414c JM |
6902 | { |
6903 | /* Just return the expression, remove a level of | |
6904 | indirection. */ | |
bbbbb16a | 6905 | ret = VEC_index (tree, expr_list, 0); |
27bf414c JM |
6906 | } |
6907 | else | |
6908 | { | |
6909 | /* We have a comma expression, we will collapse later. */ | |
c166b898 | 6910 | ret = build_tree_list_vec (expr_list); |
27bf414c | 6911 | } |
c166b898 | 6912 | release_tree_vector (expr_list); |
bbbbb16a | 6913 | return ret; |
27bf414c JM |
6914 | } |
6915 | ||
6916 | \f | |
953ff289 DN |
6917 | /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore |
6918 | should be considered, statements. ALLOW_STMT is true if we're within | |
6919 | the context of a function and such pragmas are to be allowed. Returns | |
6920 | true if we actually parsed such a pragma. */ | |
27bf414c | 6921 | |
bc4071dd | 6922 | static bool |
953ff289 | 6923 | c_parser_pragma (c_parser *parser, enum pragma_context context) |
bc4071dd RH |
6924 | { |
6925 | unsigned int id; | |
6926 | ||
6927 | id = c_parser_peek_token (parser)->pragma_kind; | |
6928 | gcc_assert (id != PRAGMA_NONE); | |
6929 | ||
6930 | switch (id) | |
6931 | { | |
953ff289 DN |
6932 | case PRAGMA_OMP_BARRIER: |
6933 | if (context != pragma_compound) | |
6934 | { | |
6935 | if (context == pragma_stmt) | |
6936 | c_parser_error (parser, "%<#pragma omp barrier%> may only be " | |
6937 | "used in compound statements"); | |
6938 | goto bad_stmt; | |
6939 | } | |
6940 | c_parser_omp_barrier (parser); | |
6941 | return false; | |
6942 | ||
6943 | case PRAGMA_OMP_FLUSH: | |
6944 | if (context != pragma_compound) | |
6945 | { | |
6946 | if (context == pragma_stmt) | |
6947 | c_parser_error (parser, "%<#pragma omp flush%> may only be " | |
6948 | "used in compound statements"); | |
6949 | goto bad_stmt; | |
6950 | } | |
6951 | c_parser_omp_flush (parser); | |
6952 | return false; | |
6953 | ||
a68ab351 JJ |
6954 | case PRAGMA_OMP_TASKWAIT: |
6955 | if (context != pragma_compound) | |
6956 | { | |
6957 | if (context == pragma_stmt) | |
6958 | c_parser_error (parser, "%<#pragma omp taskwait%> may only be " | |
6959 | "used in compound statements"); | |
6960 | goto bad_stmt; | |
6961 | } | |
6962 | c_parser_omp_taskwait (parser); | |
6963 | return false; | |
6964 | ||
953ff289 DN |
6965 | case PRAGMA_OMP_THREADPRIVATE: |
6966 | c_parser_omp_threadprivate (parser); | |
6967 | return false; | |
6968 | ||
6969 | case PRAGMA_OMP_SECTION: | |
3ba09659 AH |
6970 | error_at (c_parser_peek_token (parser)->location, |
6971 | "%<#pragma omp section%> may only be used in " | |
6972 | "%<#pragma omp sections%> construct"); | |
953ff289 DN |
6973 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); |
6974 | return false; | |
6975 | ||
bc4071dd RH |
6976 | case PRAGMA_GCC_PCH_PREPROCESS: |
6977 | c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first"); | |
6978 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
6979 | return false; | |
6980 | ||
6981 | default: | |
953ff289 DN |
6982 | if (id < PRAGMA_FIRST_EXTERNAL) |
6983 | { | |
6984 | if (context == pragma_external) | |
6985 | { | |
6986 | bad_stmt: | |
6987 | c_parser_error (parser, "expected declaration specifiers"); | |
6988 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
6989 | return false; | |
6990 | } | |
6991 | c_parser_omp_construct (parser); | |
6992 | return true; | |
6993 | } | |
bc4071dd RH |
6994 | break; |
6995 | } | |
6996 | ||
6997 | c_parser_consume_pragma (parser); | |
6998 | c_invoke_pragma_handler (id); | |
27bf414c | 6999 | |
bc4071dd RH |
7000 | /* Skip to EOL, but suppress any error message. Those will have been |
7001 | generated by the handler routine through calling error, as opposed | |
7002 | to calling c_parser_error. */ | |
7003 | parser->error = true; | |
7004 | c_parser_skip_to_pragma_eol (parser); | |
7005 | ||
7006 | return false; | |
7007 | } | |
7008 | ||
7009 | /* The interface the pragma parsers have to the lexer. */ | |
7010 | ||
7011 | enum cpp_ttype | |
7012 | pragma_lex (tree *value) | |
7013 | { | |
7014 | c_token *tok = c_parser_peek_token (the_parser); | |
7015 | enum cpp_ttype ret = tok->type; | |
7016 | ||
7017 | *value = tok->value; | |
7018 | if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF) | |
7019 | ret = CPP_EOF; | |
7020 | else | |
7021 | { | |
7022 | if (ret == CPP_KEYWORD) | |
7023 | ret = CPP_NAME; | |
7024 | c_parser_consume_token (the_parser); | |
7025 | } | |
7026 | ||
7027 | return ret; | |
7028 | } | |
7029 | ||
7030 | static void | |
7031 | c_parser_pragma_pch_preprocess (c_parser *parser) | |
7032 | { | |
7033 | tree name = NULL; | |
7034 | ||
7035 | c_parser_consume_pragma (parser); | |
7036 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
7037 | { | |
7038 | name = c_parser_peek_token (parser)->value; | |
7039 | c_parser_consume_token (parser); | |
7040 | } | |
7041 | else | |
7042 | c_parser_error (parser, "expected string literal"); | |
7043 | c_parser_skip_to_pragma_eol (parser); | |
7044 | ||
7045 | if (name) | |
7046 | c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name)); | |
7047 | } | |
953ff289 DN |
7048 | \f |
7049 | /* OpenMP 2.5 parsing routines. */ | |
7050 | ||
7051 | /* Returns name of the next clause. | |
7052 | If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and | |
7053 | the token is not consumed. Otherwise appropriate pragma_omp_clause is | |
7054 | returned and the token is consumed. */ | |
7055 | ||
7056 | static pragma_omp_clause | |
7057 | c_parser_omp_clause_name (c_parser *parser) | |
7058 | { | |
7059 | pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE; | |
7060 | ||
7061 | if (c_parser_next_token_is_keyword (parser, RID_IF)) | |
7062 | result = PRAGMA_OMP_CLAUSE_IF; | |
7063 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
7064 | result = PRAGMA_OMP_CLAUSE_DEFAULT; | |
7065 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
7066 | { | |
7067 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
7068 | ||
7069 | switch (p[0]) | |
7070 | { | |
7071 | case 'c': | |
a68ab351 JJ |
7072 | if (!strcmp ("collapse", p)) |
7073 | result = PRAGMA_OMP_CLAUSE_COLLAPSE; | |
7074 | else if (!strcmp ("copyin", p)) | |
953ff289 DN |
7075 | result = PRAGMA_OMP_CLAUSE_COPYIN; |
7076 | else if (!strcmp ("copyprivate", p)) | |
7077 | result = PRAGMA_OMP_CLAUSE_COPYPRIVATE; | |
7078 | break; | |
7079 | case 'f': | |
7080 | if (!strcmp ("firstprivate", p)) | |
7081 | result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE; | |
7082 | break; | |
7083 | case 'l': | |
7084 | if (!strcmp ("lastprivate", p)) | |
7085 | result = PRAGMA_OMP_CLAUSE_LASTPRIVATE; | |
7086 | break; | |
7087 | case 'n': | |
7088 | if (!strcmp ("nowait", p)) | |
7089 | result = PRAGMA_OMP_CLAUSE_NOWAIT; | |
7090 | else if (!strcmp ("num_threads", p)) | |
7091 | result = PRAGMA_OMP_CLAUSE_NUM_THREADS; | |
7092 | break; | |
7093 | case 'o': | |
7094 | if (!strcmp ("ordered", p)) | |
7095 | result = PRAGMA_OMP_CLAUSE_ORDERED; | |
7096 | break; | |
7097 | case 'p': | |
7098 | if (!strcmp ("private", p)) | |
7099 | result = PRAGMA_OMP_CLAUSE_PRIVATE; | |
7100 | break; | |
7101 | case 'r': | |
7102 | if (!strcmp ("reduction", p)) | |
7103 | result = PRAGMA_OMP_CLAUSE_REDUCTION; | |
7104 | break; | |
7105 | case 's': | |
7106 | if (!strcmp ("schedule", p)) | |
7107 | result = PRAGMA_OMP_CLAUSE_SCHEDULE; | |
7108 | else if (!strcmp ("shared", p)) | |
7109 | result = PRAGMA_OMP_CLAUSE_SHARED; | |
7110 | break; | |
a68ab351 JJ |
7111 | case 'u': |
7112 | if (!strcmp ("untied", p)) | |
7113 | result = PRAGMA_OMP_CLAUSE_UNTIED; | |
7114 | break; | |
953ff289 DN |
7115 | } |
7116 | } | |
7117 | ||
7118 | if (result != PRAGMA_OMP_CLAUSE_NONE) | |
7119 | c_parser_consume_token (parser); | |
7120 | ||
7121 | return result; | |
7122 | } | |
7123 | ||
7124 | /* Validate that a clause of the given type does not already exist. */ | |
7125 | ||
7126 | static void | |
d75d71e0 ILT |
7127 | check_no_duplicate_clause (tree clauses, enum omp_clause_code code, |
7128 | const char *name) | |
953ff289 DN |
7129 | { |
7130 | tree c; | |
7131 | ||
7132 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
aaf46ef9 | 7133 | if (OMP_CLAUSE_CODE (c) == code) |
953ff289 | 7134 | { |
c2255bc4 AH |
7135 | location_t loc = OMP_CLAUSE_LOCATION (c); |
7136 | error_at (loc, "too many %qs clauses", name); | |
953ff289 DN |
7137 | break; |
7138 | } | |
7139 | } | |
7140 | ||
7141 | /* OpenMP 2.5: | |
7142 | variable-list: | |
7143 | identifier | |
7144 | variable-list , identifier | |
7145 | ||
c2255bc4 AH |
7146 | If KIND is nonzero, create the appropriate node and install the |
7147 | decl in OMP_CLAUSE_DECL and add the node to the head of the list. | |
7148 | If KIND is nonzero, CLAUSE_LOC is the location of the clause. | |
953ff289 DN |
7149 | |
7150 | If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE; | |
7151 | return the list created. */ | |
7152 | ||
7153 | static tree | |
c2255bc4 AH |
7154 | c_parser_omp_variable_list (c_parser *parser, |
7155 | location_t clause_loc, | |
7156 | enum omp_clause_code kind, | |
aaf46ef9 | 7157 | tree list) |
953ff289 DN |
7158 | { |
7159 | if (c_parser_next_token_is_not (parser, CPP_NAME) | |
7160 | || c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
7161 | c_parser_error (parser, "expected identifier"); | |
7162 | ||
7163 | while (c_parser_next_token_is (parser, CPP_NAME) | |
7164 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
7165 | { | |
7166 | tree t = lookup_name (c_parser_peek_token (parser)->value); | |
7167 | ||
7168 | if (t == NULL_TREE) | |
c2255bc4 AH |
7169 | undeclared_variable (c_parser_peek_token (parser)->location, |
7170 | c_parser_peek_token (parser)->value); | |
953ff289 DN |
7171 | else if (t == error_mark_node) |
7172 | ; | |
7173 | else if (kind != 0) | |
7174 | { | |
c2255bc4 | 7175 | tree u = build_omp_clause (clause_loc, kind); |
953ff289 DN |
7176 | OMP_CLAUSE_DECL (u) = t; |
7177 | OMP_CLAUSE_CHAIN (u) = list; | |
7178 | list = u; | |
7179 | } | |
7180 | else | |
7181 | list = tree_cons (t, NULL_TREE, list); | |
7182 | ||
7183 | c_parser_consume_token (parser); | |
7184 | ||
7185 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
7186 | break; | |
7187 | ||
7188 | c_parser_consume_token (parser); | |
7189 | } | |
7190 | ||
7191 | return list; | |
7192 | } | |
7193 | ||
7194 | /* Similarly, but expect leading and trailing parenthesis. This is a very | |
7195 | common case for omp clauses. */ | |
7196 | ||
7197 | static tree | |
d75d71e0 ILT |
7198 | c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind, |
7199 | tree list) | |
953ff289 | 7200 | { |
c2255bc4 AH |
7201 | /* The clauses location. */ |
7202 | location_t loc = c_parser_peek_token (parser)->location; | |
7203 | ||
953ff289 DN |
7204 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7205 | { | |
c2255bc4 | 7206 | list = c_parser_omp_variable_list (parser, loc, kind, list); |
953ff289 DN |
7207 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
7208 | } | |
7209 | return list; | |
7210 | } | |
7211 | ||
a68ab351 JJ |
7212 | /* OpenMP 3.0: |
7213 | collapse ( constant-expression ) */ | |
7214 | ||
7215 | static tree | |
7216 | c_parser_omp_clause_collapse (c_parser *parser, tree list) | |
7217 | { | |
7218 | tree c, num = error_mark_node; | |
7219 | HOST_WIDE_INT n; | |
7220 | location_t loc; | |
7221 | ||
7222 | check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse"); | |
7223 | ||
7224 | loc = c_parser_peek_token (parser)->location; | |
7225 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7226 | { | |
7227 | num = c_parser_expr_no_commas (parser, NULL).value; | |
7228 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7229 | } | |
7230 | if (num == error_mark_node) | |
7231 | return list; | |
7232 | if (!INTEGRAL_TYPE_P (TREE_TYPE (num)) | |
7233 | || !host_integerp (num, 0) | |
7234 | || (n = tree_low_cst (num, 0)) <= 0 | |
7235 | || (int) n != n) | |
7236 | { | |
3ba09659 AH |
7237 | error_at (loc, |
7238 | "collapse argument needs positive constant integer expression"); | |
a68ab351 JJ |
7239 | return list; |
7240 | } | |
c2255bc4 | 7241 | c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE); |
a68ab351 JJ |
7242 | OMP_CLAUSE_COLLAPSE_EXPR (c) = num; |
7243 | OMP_CLAUSE_CHAIN (c) = list; | |
7244 | return c; | |
7245 | } | |
7246 | ||
953ff289 DN |
7247 | /* OpenMP 2.5: |
7248 | copyin ( variable-list ) */ | |
7249 | ||
7250 | static tree | |
7251 | c_parser_omp_clause_copyin (c_parser *parser, tree list) | |
7252 | { | |
7253 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list); | |
7254 | } | |
7255 | ||
7256 | /* OpenMP 2.5: | |
7257 | copyprivate ( variable-list ) */ | |
7258 | ||
7259 | static tree | |
7260 | c_parser_omp_clause_copyprivate (c_parser *parser, tree list) | |
7261 | { | |
7262 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list); | |
7263 | } | |
7264 | ||
7265 | /* OpenMP 2.5: | |
7266 | default ( shared | none ) */ | |
7267 | ||
7268 | static tree | |
7269 | c_parser_omp_clause_default (c_parser *parser, tree list) | |
7270 | { | |
7271 | enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; | |
c2255bc4 | 7272 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7273 | tree c; |
7274 | ||
7275 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7276 | return list; | |
7277 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7278 | { | |
7279 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
7280 | ||
7281 | switch (p[0]) | |
7282 | { | |
7283 | case 'n': | |
7284 | if (strcmp ("none", p) != 0) | |
7285 | goto invalid_kind; | |
7286 | kind = OMP_CLAUSE_DEFAULT_NONE; | |
7287 | break; | |
7288 | ||
7289 | case 's': | |
7290 | if (strcmp ("shared", p) != 0) | |
7291 | goto invalid_kind; | |
7292 | kind = OMP_CLAUSE_DEFAULT_SHARED; | |
7293 | break; | |
7294 | ||
7295 | default: | |
7296 | goto invalid_kind; | |
7297 | } | |
7298 | ||
7299 | c_parser_consume_token (parser); | |
7300 | } | |
7301 | else | |
7302 | { | |
7303 | invalid_kind: | |
7304 | c_parser_error (parser, "expected %<none%> or %<shared%>"); | |
7305 | } | |
7306 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7307 | ||
7308 | if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED) | |
7309 | return list; | |
7310 | ||
7311 | check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default"); | |
c2255bc4 | 7312 | c = build_omp_clause (loc, OMP_CLAUSE_DEFAULT); |
953ff289 DN |
7313 | OMP_CLAUSE_CHAIN (c) = list; |
7314 | OMP_CLAUSE_DEFAULT_KIND (c) = kind; | |
7315 | ||
7316 | return c; | |
7317 | } | |
7318 | ||
7319 | /* OpenMP 2.5: | |
7320 | firstprivate ( variable-list ) */ | |
7321 | ||
7322 | static tree | |
7323 | c_parser_omp_clause_firstprivate (c_parser *parser, tree list) | |
7324 | { | |
7325 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list); | |
7326 | } | |
7327 | ||
7328 | /* OpenMP 2.5: | |
7329 | if ( expression ) */ | |
7330 | ||
7331 | static tree | |
7332 | c_parser_omp_clause_if (c_parser *parser, tree list) | |
7333 | { | |
c2255bc4 | 7334 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7335 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
7336 | { | |
7337 | tree t = c_parser_paren_condition (parser); | |
7338 | tree c; | |
7339 | ||
7340 | check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if"); | |
7341 | ||
c2255bc4 | 7342 | c = build_omp_clause (loc, OMP_CLAUSE_IF); |
953ff289 DN |
7343 | OMP_CLAUSE_IF_EXPR (c) = t; |
7344 | OMP_CLAUSE_CHAIN (c) = list; | |
7345 | list = c; | |
7346 | } | |
7347 | else | |
7348 | c_parser_error (parser, "expected %<(%>"); | |
7349 | ||
7350 | return list; | |
7351 | } | |
7352 | ||
7353 | /* OpenMP 2.5: | |
7354 | lastprivate ( variable-list ) */ | |
7355 | ||
7356 | static tree | |
7357 | c_parser_omp_clause_lastprivate (c_parser *parser, tree list) | |
7358 | { | |
7359 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list); | |
7360 | } | |
7361 | ||
7362 | /* OpenMP 2.5: | |
7363 | nowait */ | |
7364 | ||
7365 | static tree | |
7366 | c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7367 | { | |
7368 | tree c; | |
c2255bc4 | 7369 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7370 | |
7371 | check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait"); | |
7372 | ||
c2255bc4 | 7373 | c = build_omp_clause (loc, OMP_CLAUSE_NOWAIT); |
953ff289 DN |
7374 | OMP_CLAUSE_CHAIN (c) = list; |
7375 | return c; | |
7376 | } | |
7377 | ||
7378 | /* OpenMP 2.5: | |
7379 | num_threads ( expression ) */ | |
7380 | ||
7381 | static tree | |
7382 | c_parser_omp_clause_num_threads (c_parser *parser, tree list) | |
7383 | { | |
c2255bc4 | 7384 | location_t num_threads_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7385 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7386 | { | |
c7412148 | 7387 | location_t expr_loc = c_parser_peek_token (parser)->location; |
953ff289 | 7388 | tree c, t = c_parser_expression (parser).value; |
928c19bb | 7389 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
7390 | |
7391 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7392 | ||
7393 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
7394 | { | |
7395 | c_parser_error (parser, "expected integer expression"); | |
7396 | return list; | |
7397 | } | |
7398 | ||
7399 | /* Attempt to statically determine when the number isn't positive. */ | |
db3927fb | 7400 | c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t, |
953ff289 | 7401 | build_int_cst (TREE_TYPE (t), 0)); |
c2255bc4 AH |
7402 | if (CAN_HAVE_LOCATION_P (c)) |
7403 | SET_EXPR_LOCATION (c, expr_loc); | |
953ff289 DN |
7404 | if (c == boolean_true_node) |
7405 | { | |
3ba09659 AH |
7406 | warning_at (expr_loc, 0, |
7407 | "%<num_threads%> value must be positive"); | |
953ff289 DN |
7408 | t = integer_one_node; |
7409 | } | |
7410 | ||
7411 | check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads"); | |
7412 | ||
c2255bc4 | 7413 | c = build_omp_clause (num_threads_loc, OMP_CLAUSE_NUM_THREADS); |
953ff289 DN |
7414 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; |
7415 | OMP_CLAUSE_CHAIN (c) = list; | |
7416 | list = c; | |
7417 | } | |
7418 | ||
7419 | return list; | |
7420 | } | |
7421 | ||
7422 | /* OpenMP 2.5: | |
7423 | ordered */ | |
7424 | ||
7425 | static tree | |
c2255bc4 | 7426 | c_parser_omp_clause_ordered (c_parser *parser, tree list) |
953ff289 DN |
7427 | { |
7428 | tree c; | |
7429 | ||
7430 | check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered"); | |
7431 | ||
c2255bc4 AH |
7432 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
7433 | OMP_CLAUSE_ORDERED); | |
953ff289 | 7434 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 7435 | |
953ff289 DN |
7436 | return c; |
7437 | } | |
7438 | ||
7439 | /* OpenMP 2.5: | |
7440 | private ( variable-list ) */ | |
7441 | ||
7442 | static tree | |
7443 | c_parser_omp_clause_private (c_parser *parser, tree list) | |
7444 | { | |
7445 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list); | |
7446 | } | |
7447 | ||
7448 | /* OpenMP 2.5: | |
7449 | reduction ( reduction-operator : variable-list ) | |
7450 | ||
7451 | reduction-operator: | |
7452 | One of: + * - & ^ | && || */ | |
7453 | ||
7454 | static tree | |
7455 | c_parser_omp_clause_reduction (c_parser *parser, tree list) | |
7456 | { | |
c2255bc4 | 7457 | location_t clause_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7458 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7459 | { | |
7460 | enum tree_code code; | |
7461 | ||
7462 | switch (c_parser_peek_token (parser)->type) | |
7463 | { | |
7464 | case CPP_PLUS: | |
7465 | code = PLUS_EXPR; | |
7466 | break; | |
7467 | case CPP_MULT: | |
7468 | code = MULT_EXPR; | |
7469 | break; | |
7470 | case CPP_MINUS: | |
7471 | code = MINUS_EXPR; | |
7472 | break; | |
7473 | case CPP_AND: | |
7474 | code = BIT_AND_EXPR; | |
7475 | break; | |
7476 | case CPP_XOR: | |
7477 | code = BIT_XOR_EXPR; | |
7478 | break; | |
7479 | case CPP_OR: | |
7480 | code = BIT_IOR_EXPR; | |
7481 | break; | |
7482 | case CPP_AND_AND: | |
7483 | code = TRUTH_ANDIF_EXPR; | |
7484 | break; | |
7485 | case CPP_OR_OR: | |
7486 | code = TRUTH_ORIF_EXPR; | |
7487 | break; | |
7488 | default: | |
7489 | c_parser_error (parser, | |
7490 | "expected %<+%>, %<*%>, %<-%>, %<&%>, " | |
7491 | "%<^%>, %<|%>, %<&&%>, or %<||%>"); | |
7492 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7493 | return list; | |
7494 | } | |
7495 | c_parser_consume_token (parser); | |
7496 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
7497 | { | |
7498 | tree nl, c; | |
7499 | ||
c2255bc4 AH |
7500 | nl = c_parser_omp_variable_list (parser, clause_loc, |
7501 | OMP_CLAUSE_REDUCTION, list); | |
953ff289 DN |
7502 | for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c)) |
7503 | OMP_CLAUSE_REDUCTION_CODE (c) = code; | |
7504 | ||
7505 | list = nl; | |
7506 | } | |
7507 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7508 | } | |
7509 | return list; | |
7510 | } | |
7511 | ||
7512 | /* OpenMP 2.5: | |
7513 | schedule ( schedule-kind ) | |
7514 | schedule ( schedule-kind , expression ) | |
7515 | ||
7516 | schedule-kind: | |
a68ab351 | 7517 | static | dynamic | guided | runtime | auto |
953ff289 DN |
7518 | */ |
7519 | ||
7520 | static tree | |
7521 | c_parser_omp_clause_schedule (c_parser *parser, tree list) | |
7522 | { | |
7523 | tree c, t; | |
c2255bc4 | 7524 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7525 | |
7526 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7527 | return list; | |
7528 | ||
c2255bc4 | 7529 | c = build_omp_clause (loc, OMP_CLAUSE_SCHEDULE); |
953ff289 DN |
7530 | |
7531 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7532 | { | |
7533 | tree kind = c_parser_peek_token (parser)->value; | |
7534 | const char *p = IDENTIFIER_POINTER (kind); | |
7535 | ||
7536 | switch (p[0]) | |
7537 | { | |
7538 | case 'd': | |
7539 | if (strcmp ("dynamic", p) != 0) | |
7540 | goto invalid_kind; | |
7541 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC; | |
7542 | break; | |
7543 | ||
7544 | case 'g': | |
7545 | if (strcmp ("guided", p) != 0) | |
7546 | goto invalid_kind; | |
7547 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED; | |
7548 | break; | |
7549 | ||
7550 | case 'r': | |
7551 | if (strcmp ("runtime", p) != 0) | |
7552 | goto invalid_kind; | |
7553 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME; | |
7554 | break; | |
7555 | ||
7556 | default: | |
7557 | goto invalid_kind; | |
7558 | } | |
7559 | } | |
7560 | else if (c_parser_next_token_is_keyword (parser, RID_STATIC)) | |
7561 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC; | |
a68ab351 JJ |
7562 | else if (c_parser_next_token_is_keyword (parser, RID_AUTO)) |
7563 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO; | |
953ff289 DN |
7564 | else |
7565 | goto invalid_kind; | |
7566 | ||
7567 | c_parser_consume_token (parser); | |
7568 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7569 | { | |
c7412148 | 7570 | location_t here; |
953ff289 DN |
7571 | c_parser_consume_token (parser); |
7572 | ||
c7412148 | 7573 | here = c_parser_peek_token (parser)->location; |
953ff289 | 7574 | t = c_parser_expr_no_commas (parser, NULL).value; |
928c19bb | 7575 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
7576 | |
7577 | if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME) | |
3ba09659 AH |
7578 | error_at (here, "schedule %<runtime%> does not take " |
7579 | "a %<chunk_size%> parameter"); | |
a68ab351 | 7580 | else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO) |
3ba09659 AH |
7581 | error_at (here, |
7582 | "schedule %<auto%> does not take " | |
7583 | "a %<chunk_size%> parameter"); | |
953ff289 DN |
7584 | else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE) |
7585 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
7586 | else | |
7587 | c_parser_error (parser, "expected integer expression"); | |
7588 | ||
7589 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7590 | } | |
7591 | else | |
7592 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7593 | "expected %<,%> or %<)%>"); | |
7594 | ||
7595 | check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule"); | |
7596 | OMP_CLAUSE_CHAIN (c) = list; | |
7597 | return c; | |
7598 | ||
7599 | invalid_kind: | |
7600 | c_parser_error (parser, "invalid schedule kind"); | |
7601 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7602 | return list; | |
7603 | } | |
7604 | ||
7605 | /* OpenMP 2.5: | |
7606 | shared ( variable-list ) */ | |
7607 | ||
7608 | static tree | |
7609 | c_parser_omp_clause_shared (c_parser *parser, tree list) | |
7610 | { | |
7611 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list); | |
7612 | } | |
7613 | ||
a68ab351 JJ |
7614 | /* OpenMP 3.0: |
7615 | untied */ | |
7616 | ||
7617 | static tree | |
7618 | c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7619 | { | |
7620 | tree c; | |
7621 | ||
7622 | /* FIXME: Should we allow duplicates? */ | |
7623 | check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied"); | |
7624 | ||
c2255bc4 AH |
7625 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
7626 | OMP_CLAUSE_UNTIED); | |
a68ab351 | 7627 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 7628 | |
a68ab351 JJ |
7629 | return c; |
7630 | } | |
7631 | ||
953ff289 DN |
7632 | /* Parse all OpenMP clauses. The set clauses allowed by the directive |
7633 | is a bitmask in MASK. Return the list of clauses found; the result | |
7634 | of clause default goes in *pdefault. */ | |
7635 | ||
7636 | static tree | |
7637 | c_parser_omp_all_clauses (c_parser *parser, unsigned int mask, | |
7638 | const char *where) | |
7639 | { | |
7640 | tree clauses = NULL; | |
8085ca15 | 7641 | bool first = true; |
953ff289 DN |
7642 | |
7643 | while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
7644 | { | |
8085ca15 JJ |
7645 | location_t here; |
7646 | pragma_omp_clause c_kind; | |
953ff289 DN |
7647 | const char *c_name; |
7648 | tree prev = clauses; | |
7649 | ||
8085ca15 JJ |
7650 | if (!first && c_parser_next_token_is (parser, CPP_COMMA)) |
7651 | c_parser_consume_token (parser); | |
7652 | ||
7653 | first = false; | |
7654 | here = c_parser_peek_token (parser)->location; | |
7655 | c_kind = c_parser_omp_clause_name (parser); | |
7656 | ||
953ff289 DN |
7657 | switch (c_kind) |
7658 | { | |
a68ab351 JJ |
7659 | case PRAGMA_OMP_CLAUSE_COLLAPSE: |
7660 | clauses = c_parser_omp_clause_collapse (parser, clauses); | |
7661 | c_name = "collapse"; | |
7662 | break; | |
953ff289 DN |
7663 | case PRAGMA_OMP_CLAUSE_COPYIN: |
7664 | clauses = c_parser_omp_clause_copyin (parser, clauses); | |
7665 | c_name = "copyin"; | |
7666 | break; | |
7667 | case PRAGMA_OMP_CLAUSE_COPYPRIVATE: | |
7668 | clauses = c_parser_omp_clause_copyprivate (parser, clauses); | |
7669 | c_name = "copyprivate"; | |
7670 | break; | |
7671 | case PRAGMA_OMP_CLAUSE_DEFAULT: | |
7672 | clauses = c_parser_omp_clause_default (parser, clauses); | |
7673 | c_name = "default"; | |
7674 | break; | |
7675 | case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE: | |
7676 | clauses = c_parser_omp_clause_firstprivate (parser, clauses); | |
7677 | c_name = "firstprivate"; | |
7678 | break; | |
7679 | case PRAGMA_OMP_CLAUSE_IF: | |
7680 | clauses = c_parser_omp_clause_if (parser, clauses); | |
7681 | c_name = "if"; | |
7682 | break; | |
7683 | case PRAGMA_OMP_CLAUSE_LASTPRIVATE: | |
7684 | clauses = c_parser_omp_clause_lastprivate (parser, clauses); | |
7685 | c_name = "lastprivate"; | |
7686 | break; | |
7687 | case PRAGMA_OMP_CLAUSE_NOWAIT: | |
7688 | clauses = c_parser_omp_clause_nowait (parser, clauses); | |
7689 | c_name = "nowait"; | |
7690 | break; | |
7691 | case PRAGMA_OMP_CLAUSE_NUM_THREADS: | |
7692 | clauses = c_parser_omp_clause_num_threads (parser, clauses); | |
7693 | c_name = "num_threads"; | |
7694 | break; | |
7695 | case PRAGMA_OMP_CLAUSE_ORDERED: | |
7696 | clauses = c_parser_omp_clause_ordered (parser, clauses); | |
7697 | c_name = "ordered"; | |
7698 | break; | |
7699 | case PRAGMA_OMP_CLAUSE_PRIVATE: | |
7700 | clauses = c_parser_omp_clause_private (parser, clauses); | |
7701 | c_name = "private"; | |
7702 | break; | |
7703 | case PRAGMA_OMP_CLAUSE_REDUCTION: | |
7704 | clauses = c_parser_omp_clause_reduction (parser, clauses); | |
7705 | c_name = "reduction"; | |
7706 | break; | |
7707 | case PRAGMA_OMP_CLAUSE_SCHEDULE: | |
7708 | clauses = c_parser_omp_clause_schedule (parser, clauses); | |
7709 | c_name = "schedule"; | |
7710 | break; | |
7711 | case PRAGMA_OMP_CLAUSE_SHARED: | |
7712 | clauses = c_parser_omp_clause_shared (parser, clauses); | |
7713 | c_name = "shared"; | |
7714 | break; | |
a68ab351 JJ |
7715 | case PRAGMA_OMP_CLAUSE_UNTIED: |
7716 | clauses = c_parser_omp_clause_untied (parser, clauses); | |
7717 | c_name = "untied"; | |
7718 | break; | |
953ff289 DN |
7719 | default: |
7720 | c_parser_error (parser, "expected %<#pragma omp%> clause"); | |
7721 | goto saw_error; | |
7722 | } | |
7723 | ||
7724 | if (((mask >> c_kind) & 1) == 0 && !parser->error) | |
7725 | { | |
7726 | /* Remove the invalid clause(s) from the list to avoid | |
7727 | confusing the rest of the compiler. */ | |
7728 | clauses = prev; | |
3ba09659 | 7729 | error_at (here, "%qs is not valid for %qs", c_name, where); |
953ff289 DN |
7730 | } |
7731 | } | |
7732 | ||
7733 | saw_error: | |
7734 | c_parser_skip_to_pragma_eol (parser); | |
7735 | ||
7736 | return c_finish_omp_clauses (clauses); | |
7737 | } | |
7738 | ||
7739 | /* OpenMP 2.5: | |
7740 | structured-block: | |
7741 | statement | |
7742 | ||
7743 | In practice, we're also interested in adding the statement to an | |
7744 | outer node. So it is convenient if we work around the fact that | |
7745 | c_parser_statement calls add_stmt. */ | |
7746 | ||
7747 | static tree | |
7748 | c_parser_omp_structured_block (c_parser *parser) | |
7749 | { | |
7750 | tree stmt = push_stmt_list (); | |
7751 | c_parser_statement (parser); | |
7752 | return pop_stmt_list (stmt); | |
7753 | } | |
7754 | ||
7755 | /* OpenMP 2.5: | |
7756 | # pragma omp atomic new-line | |
7757 | expression-stmt | |
7758 | ||
7759 | expression-stmt: | |
7760 | x binop= expr | x++ | ++x | x-- | --x | |
7761 | binop: | |
7762 | +, *, -, /, &, ^, |, <<, >> | |
7763 | ||
c2255bc4 AH |
7764 | where x is an lvalue expression with scalar type. |
7765 | ||
7766 | LOC is the location of the #pragma token. */ | |
953ff289 DN |
7767 | |
7768 | static void | |
c2255bc4 | 7769 | c_parser_omp_atomic (location_t loc, c_parser *parser) |
953ff289 DN |
7770 | { |
7771 | tree lhs, rhs; | |
fe89d797 | 7772 | tree stmt; |
953ff289 | 7773 | enum tree_code code; |
79addd1f | 7774 | struct c_expr rhs_expr; |
953ff289 DN |
7775 | |
7776 | c_parser_skip_to_pragma_eol (parser); | |
7777 | ||
7778 | lhs = c_parser_unary_expression (parser).value; | |
928c19bb | 7779 | lhs = c_fully_fold (lhs, false, NULL); |
953ff289 DN |
7780 | switch (TREE_CODE (lhs)) |
7781 | { | |
7782 | case ERROR_MARK: | |
7783 | saw_error: | |
7784 | c_parser_skip_to_end_of_block_or_statement (parser); | |
7785 | return; | |
7786 | ||
7787 | case PREINCREMENT_EXPR: | |
7788 | case POSTINCREMENT_EXPR: | |
7789 | lhs = TREE_OPERAND (lhs, 0); | |
7790 | code = PLUS_EXPR; | |
7791 | rhs = integer_one_node; | |
7792 | break; | |
7793 | ||
7794 | case PREDECREMENT_EXPR: | |
7795 | case POSTDECREMENT_EXPR: | |
7796 | lhs = TREE_OPERAND (lhs, 0); | |
7797 | code = MINUS_EXPR; | |
7798 | rhs = integer_one_node; | |
7799 | break; | |
7800 | ||
7801 | default: | |
7802 | switch (c_parser_peek_token (parser)->type) | |
7803 | { | |
7804 | case CPP_MULT_EQ: | |
7805 | code = MULT_EXPR; | |
7806 | break; | |
7807 | case CPP_DIV_EQ: | |
7808 | code = TRUNC_DIV_EXPR; | |
7809 | break; | |
7810 | case CPP_PLUS_EQ: | |
7811 | code = PLUS_EXPR; | |
7812 | break; | |
7813 | case CPP_MINUS_EQ: | |
7814 | code = MINUS_EXPR; | |
7815 | break; | |
7816 | case CPP_LSHIFT_EQ: | |
7817 | code = LSHIFT_EXPR; | |
7818 | break; | |
7819 | case CPP_RSHIFT_EQ: | |
7820 | code = RSHIFT_EXPR; | |
7821 | break; | |
7822 | case CPP_AND_EQ: | |
7823 | code = BIT_AND_EXPR; | |
7824 | break; | |
7825 | case CPP_OR_EQ: | |
7826 | code = BIT_IOR_EXPR; | |
7827 | break; | |
7828 | case CPP_XOR_EQ: | |
7829 | code = BIT_XOR_EXPR; | |
7830 | break; | |
7831 | default: | |
7832 | c_parser_error (parser, | |
7833 | "invalid operator for %<#pragma omp atomic%>"); | |
7834 | goto saw_error; | |
7835 | } | |
7836 | ||
7837 | c_parser_consume_token (parser); | |
c2255bc4 AH |
7838 | { |
7839 | location_t rhs_loc = c_parser_peek_token (parser)->location; | |
7840 | rhs_expr = c_parser_expression (parser); | |
7841 | rhs_expr = default_function_array_conversion (rhs_loc, rhs_expr); | |
7842 | } | |
79addd1f | 7843 | rhs = rhs_expr.value; |
928c19bb | 7844 | rhs = c_fully_fold (rhs, false, NULL); |
953ff289 DN |
7845 | break; |
7846 | } | |
c2255bc4 | 7847 | stmt = c_finish_omp_atomic (loc, code, lhs, rhs); |
fe89d797 MM |
7848 | if (stmt != error_mark_node) |
7849 | add_stmt (stmt); | |
953ff289 DN |
7850 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7851 | } | |
7852 | ||
7853 | ||
7854 | /* OpenMP 2.5: | |
7855 | # pragma omp barrier new-line | |
7856 | */ | |
7857 | ||
7858 | static void | |
7859 | c_parser_omp_barrier (c_parser *parser) | |
7860 | { | |
c2255bc4 | 7861 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7862 | c_parser_consume_pragma (parser); |
7863 | c_parser_skip_to_pragma_eol (parser); | |
7864 | ||
c2255bc4 | 7865 | c_finish_omp_barrier (loc); |
953ff289 DN |
7866 | } |
7867 | ||
7868 | /* OpenMP 2.5: | |
7869 | # pragma omp critical [(name)] new-line | |
7870 | structured-block | |
c2255bc4 AH |
7871 | |
7872 | LOC is the location of the #pragma itself. */ | |
953ff289 DN |
7873 | |
7874 | static tree | |
c2255bc4 | 7875 | c_parser_omp_critical (location_t loc, c_parser *parser) |
953ff289 DN |
7876 | { |
7877 | tree stmt, name = NULL; | |
7878 | ||
7879 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7880 | { | |
7881 | c_parser_consume_token (parser); | |
7882 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7883 | { | |
7884 | name = c_parser_peek_token (parser)->value; | |
7885 | c_parser_consume_token (parser); | |
7886 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7887 | } | |
7888 | else | |
7889 | c_parser_error (parser, "expected identifier"); | |
7890 | } | |
7891 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
7892 | c_parser_error (parser, "expected %<(%> or end of line"); | |
7893 | c_parser_skip_to_pragma_eol (parser); | |
7894 | ||
7895 | stmt = c_parser_omp_structured_block (parser); | |
c2255bc4 | 7896 | return c_finish_omp_critical (loc, stmt, name); |
953ff289 DN |
7897 | } |
7898 | ||
7899 | /* OpenMP 2.5: | |
7900 | # pragma omp flush flush-vars[opt] new-line | |
7901 | ||
7902 | flush-vars: | |
7903 | ( variable-list ) */ | |
7904 | ||
7905 | static void | |
7906 | c_parser_omp_flush (c_parser *parser) | |
7907 | { | |
c2255bc4 | 7908 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7909 | c_parser_consume_pragma (parser); |
7910 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
d75d71e0 | 7911 | c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 DN |
7912 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) |
7913 | c_parser_error (parser, "expected %<(%> or end of line"); | |
7914 | c_parser_skip_to_pragma_eol (parser); | |
7915 | ||
c2255bc4 | 7916 | c_finish_omp_flush (loc); |
953ff289 DN |
7917 | } |
7918 | ||
fa10beec | 7919 | /* Parse the restricted form of the for statement allowed by OpenMP. |
953ff289 | 7920 | The real trick here is to determine the loop control variable early |
c2255bc4 AH |
7921 | so that we can push a new decl if necessary to make it private. |
7922 | LOC is the location of the OMP in "#pragma omp". */ | |
953ff289 DN |
7923 | |
7924 | static tree | |
c2255bc4 AH |
7925 | c_parser_omp_for_loop (location_t loc, |
7926 | c_parser *parser, tree clauses, tree *par_clauses) | |
953ff289 | 7927 | { |
a68ab351 JJ |
7928 | tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl; |
7929 | tree declv, condv, incrv, initv, for_block = NULL, ret = NULL; | |
a68ab351 JJ |
7930 | bool fail = false, open_brace_parsed = false; |
7931 | int i, collapse = 1, nbraces = 0; | |
c2255bc4 | 7932 | location_t for_loc; |
a68ab351 JJ |
7933 | |
7934 | for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl)) | |
7935 | if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE) | |
7936 | collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0); | |
7937 | ||
7938 | gcc_assert (collapse >= 1); | |
7939 | ||
7940 | declv = make_tree_vec (collapse); | |
7941 | initv = make_tree_vec (collapse); | |
7942 | condv = make_tree_vec (collapse); | |
7943 | incrv = make_tree_vec (collapse); | |
953ff289 DN |
7944 | |
7945 | if (!c_parser_next_token_is_keyword (parser, RID_FOR)) | |
7946 | { | |
7947 | c_parser_error (parser, "for statement expected"); | |
7948 | return NULL; | |
7949 | } | |
c2255bc4 | 7950 | for_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7951 | c_parser_consume_token (parser); |
7952 | ||
a68ab351 | 7953 | for (i = 0; i < collapse; i++) |
953ff289 | 7954 | { |
a68ab351 | 7955 | int bracecount = 0; |
953ff289 | 7956 | |
a68ab351 JJ |
7957 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7958 | goto pop_scopes; | |
953ff289 | 7959 | |
a68ab351 JJ |
7960 | /* Parse the initialization declaration or expression. */ |
7961 | if (c_parser_next_token_starts_declspecs (parser)) | |
7962 | { | |
7963 | if (i > 0) | |
7964 | for_block | |
7965 | = tree_cons (NULL, c_begin_compound_stmt (true), for_block); | |
7966 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
c2255bc4 | 7967 | decl = check_for_loop_decls (for_loc); |
a68ab351 JJ |
7968 | if (decl == NULL) |
7969 | goto error_init; | |
7970 | if (DECL_INITIAL (decl) == error_mark_node) | |
7971 | decl = error_mark_node; | |
7972 | init = decl; | |
7973 | } | |
7974 | else if (c_parser_next_token_is (parser, CPP_NAME) | |
7975 | && c_parser_peek_2nd_token (parser)->type == CPP_EQ) | |
7976 | { | |
32e8bb8e | 7977 | struct c_expr decl_exp; |
a68ab351 | 7978 | struct c_expr init_exp; |
c9f9eb5d | 7979 | location_t init_loc; |
a68ab351 | 7980 | |
32e8bb8e ILT |
7981 | decl_exp = c_parser_postfix_expression (parser); |
7982 | decl = decl_exp.value; | |
a68ab351 JJ |
7983 | |
7984 | c_parser_require (parser, CPP_EQ, "expected %<=%>"); | |
7985 | ||
c2255bc4 | 7986 | init_loc = c_parser_peek_token (parser)->location; |
a68ab351 | 7987 | init_exp = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 | 7988 | init_exp = default_function_array_conversion (init_loc, init_exp); |
32e8bb8e | 7989 | init = build_modify_expr (init_loc, decl, decl_exp.original_type, |
c2255bc4 | 7990 | NOP_EXPR, init_loc, init_exp.value, |
bbbbb16a | 7991 | init_exp.original_type); |
c2255bc4 | 7992 | init = c_process_expr_stmt (init_loc, init); |
953ff289 | 7993 | |
a68ab351 JJ |
7994 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7995 | } | |
7996 | else | |
7997 | { | |
7998 | error_init: | |
7999 | c_parser_error (parser, | |
8000 | "expected iteration declaration or initialization"); | |
8001 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
8002 | "expected %<)%>"); | |
8003 | fail = true; | |
8004 | goto parse_next; | |
8005 | } | |
8006 | ||
8007 | /* Parse the loop condition. */ | |
8008 | cond = NULL_TREE; | |
8009 | if (c_parser_next_token_is_not (parser, CPP_SEMICOLON)) | |
8010 | { | |
3ba09659 | 8011 | location_t cond_loc = c_parser_peek_token (parser)->location; |
c5cdb03f | 8012 | struct c_expr cond_expr = c_parser_binary_expression (parser, NULL); |
3ba09659 | 8013 | |
c5cdb03f | 8014 | cond = cond_expr.value; |
3ba09659 | 8015 | cond = c_objc_common_truthvalue_conversion (cond_loc, cond); |
928c19bb | 8016 | cond = c_fully_fold (cond, false, NULL); |
c5cdb03f JJ |
8017 | switch (cond_expr.original_code) |
8018 | { | |
8019 | case GT_EXPR: | |
8020 | case GE_EXPR: | |
8021 | case LT_EXPR: | |
8022 | case LE_EXPR: | |
8023 | break; | |
8024 | default: | |
8025 | /* Can't be cond = error_mark_node, because we want to preserve | |
8026 | the location until c_finish_omp_for. */ | |
8027 | cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node); | |
8028 | break; | |
8029 | } | |
c9f9eb5d | 8030 | protected_set_expr_location (cond, cond_loc); |
a68ab351 | 8031 | } |
953ff289 | 8032 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
953ff289 | 8033 | |
a68ab351 JJ |
8034 | /* Parse the increment expression. */ |
8035 | incr = NULL_TREE; | |
8036 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)) | |
c9f9eb5d AH |
8037 | { |
8038 | location_t incr_loc = c_parser_peek_token (parser)->location; | |
8039 | ||
c2255bc4 AH |
8040 | incr = c_process_expr_stmt (incr_loc, |
8041 | c_parser_expression (parser).value); | |
c9f9eb5d | 8042 | } |
a68ab351 | 8043 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
953ff289 | 8044 | |
a68ab351 JJ |
8045 | if (decl == NULL || decl == error_mark_node || init == error_mark_node) |
8046 | fail = true; | |
8047 | else | |
8048 | { | |
8049 | TREE_VEC_ELT (declv, i) = decl; | |
8050 | TREE_VEC_ELT (initv, i) = init; | |
8051 | TREE_VEC_ELT (condv, i) = cond; | |
8052 | TREE_VEC_ELT (incrv, i) = incr; | |
8053 | } | |
8054 | ||
8055 | parse_next: | |
8056 | if (i == collapse - 1) | |
8057 | break; | |
8058 | ||
8059 | /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed | |
8060 | in between the collapsed for loops to be still considered perfectly | |
8061 | nested. Hopefully the final version clarifies this. | |
8062 | For now handle (multiple) {'s and empty statements. */ | |
8063 | do | |
8064 | { | |
8065 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
8066 | { | |
8067 | c_parser_consume_token (parser); | |
8068 | break; | |
8069 | } | |
8070 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
8071 | { | |
8072 | c_parser_consume_token (parser); | |
8073 | bracecount++; | |
8074 | } | |
8075 | else if (bracecount | |
8076 | && c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
8077 | c_parser_consume_token (parser); | |
8078 | else | |
8079 | { | |
8080 | c_parser_error (parser, "not enough perfectly nested loops"); | |
8081 | if (bracecount) | |
8082 | { | |
8083 | open_brace_parsed = true; | |
8084 | bracecount--; | |
8085 | } | |
8086 | fail = true; | |
8087 | collapse = 0; | |
8088 | break; | |
8089 | } | |
8090 | } | |
8091 | while (1); | |
8092 | ||
8093 | nbraces += bracecount; | |
8094 | } | |
953ff289 | 8095 | |
953ff289 DN |
8096 | save_break = c_break_label; |
8097 | c_break_label = size_one_node; | |
8098 | save_cont = c_cont_label; | |
8099 | c_cont_label = NULL_TREE; | |
8100 | body = push_stmt_list (); | |
8101 | ||
a68ab351 JJ |
8102 | if (open_brace_parsed) |
8103 | { | |
c2255bc4 | 8104 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8105 | stmt = c_begin_compound_stmt (true); |
8106 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 8107 | add_stmt (c_end_compound_stmt (here, stmt, true)); |
a68ab351 JJ |
8108 | } |
8109 | else | |
8110 | add_stmt (c_parser_c99_block_statement (parser)); | |
953ff289 | 8111 | if (c_cont_label) |
c2255bc4 AH |
8112 | { |
8113 | tree t = build1 (LABEL_EXPR, void_type_node, c_cont_label); | |
8114 | SET_EXPR_LOCATION (t, loc); | |
8115 | add_stmt (t); | |
8116 | } | |
953ff289 DN |
8117 | |
8118 | body = pop_stmt_list (body); | |
8119 | c_break_label = save_break; | |
8120 | c_cont_label = save_cont; | |
8121 | ||
a68ab351 JJ |
8122 | while (nbraces) |
8123 | { | |
8124 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8125 | { | |
8126 | c_parser_consume_token (parser); | |
8127 | nbraces--; | |
8128 | } | |
8129 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
8130 | c_parser_consume_token (parser); | |
8131 | else | |
8132 | { | |
8133 | c_parser_error (parser, "collapsed loops not perfectly nested"); | |
8134 | while (nbraces) | |
8135 | { | |
c2255bc4 | 8136 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8137 | stmt = c_begin_compound_stmt (true); |
8138 | add_stmt (body); | |
8139 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 8140 | body = c_end_compound_stmt (here, stmt, true); |
a68ab351 JJ |
8141 | nbraces--; |
8142 | } | |
8143 | goto pop_scopes; | |
8144 | } | |
8145 | } | |
8146 | ||
61c3a446 | 8147 | /* Only bother calling c_finish_omp_for if we haven't already generated |
953ff289 | 8148 | an error from the initialization parsing. */ |
a68ab351 JJ |
8149 | if (!fail) |
8150 | { | |
8151 | stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL); | |
8152 | if (stmt) | |
8153 | { | |
8154 | if (par_clauses != NULL) | |
8155 | { | |
8156 | tree *c; | |
8157 | for (c = par_clauses; *c ; ) | |
8158 | if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE | |
8159 | && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE) | |
8160 | c = &OMP_CLAUSE_CHAIN (*c); | |
8161 | else | |
8162 | { | |
8163 | for (i = 0; i < collapse; i++) | |
8164 | if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c)) | |
8165 | break; | |
8166 | if (i == collapse) | |
8167 | c = &OMP_CLAUSE_CHAIN (*c); | |
8168 | else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE) | |
8169 | { | |
3ba09659 AH |
8170 | error_at (loc, |
8171 | "iteration variable %qD should not be firstprivate", | |
8172 | OMP_CLAUSE_DECL (*c)); | |
a68ab351 JJ |
8173 | *c = OMP_CLAUSE_CHAIN (*c); |
8174 | } | |
8175 | else | |
8176 | { | |
8177 | /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES, | |
8178 | change it to shared (decl) in | |
8179 | OMP_PARALLEL_CLAUSES. */ | |
c2255bc4 AH |
8180 | tree l = build_omp_clause (OMP_CLAUSE_LOCATION (*c), |
8181 | OMP_CLAUSE_LASTPRIVATE); | |
a68ab351 JJ |
8182 | OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c); |
8183 | OMP_CLAUSE_CHAIN (l) = clauses; | |
8184 | clauses = l; | |
8185 | OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED); | |
8186 | } | |
8187 | } | |
8188 | } | |
8189 | OMP_FOR_CLAUSES (stmt) = clauses; | |
8190 | } | |
8191 | ret = stmt; | |
8192 | } | |
8193 | pop_scopes: | |
8194 | while (for_block) | |
8195 | { | |
c2255bc4 AH |
8196 | /* FIXME diagnostics: LOC below should be the actual location of |
8197 | this particular for block. We need to build a list of | |
8198 | locations to go along with FOR_BLOCK. */ | |
8199 | stmt = c_end_compound_stmt (loc, TREE_VALUE (for_block), true); | |
a68ab351 JJ |
8200 | add_stmt (stmt); |
8201 | for_block = TREE_CHAIN (for_block); | |
8202 | } | |
8203 | return ret; | |
953ff289 DN |
8204 | } |
8205 | ||
8206 | /* OpenMP 2.5: | |
8207 | #pragma omp for for-clause[optseq] new-line | |
8208 | for-loop | |
c2255bc4 AH |
8209 | |
8210 | LOC is the location of the #pragma token. | |
953ff289 DN |
8211 | */ |
8212 | ||
8213 | #define OMP_FOR_CLAUSE_MASK \ | |
8214 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8215 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8216 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
8217 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8218 | | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \ | |
8219 | | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \ | |
a68ab351 | 8220 | | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \ |
953ff289 DN |
8221 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) |
8222 | ||
8223 | static tree | |
c2255bc4 | 8224 | c_parser_omp_for (location_t loc, c_parser *parser) |
953ff289 DN |
8225 | { |
8226 | tree block, clauses, ret; | |
8227 | ||
8228 | clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK, | |
8229 | "#pragma omp for"); | |
8230 | ||
8231 | block = c_begin_compound_stmt (true); | |
c2255bc4 AH |
8232 | ret = c_parser_omp_for_loop (loc, parser, clauses, NULL); |
8233 | block = c_end_compound_stmt (loc, block, true); | |
953ff289 DN |
8234 | add_stmt (block); |
8235 | ||
8236 | return ret; | |
8237 | } | |
8238 | ||
8239 | /* OpenMP 2.5: | |
8240 | # pragma omp master new-line | |
8241 | structured-block | |
c2255bc4 AH |
8242 | |
8243 | LOC is the location of the #pragma token. | |
953ff289 DN |
8244 | */ |
8245 | ||
8246 | static tree | |
c2255bc4 | 8247 | c_parser_omp_master (location_t loc, c_parser *parser) |
953ff289 DN |
8248 | { |
8249 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 8250 | return c_finish_omp_master (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
8251 | } |
8252 | ||
8253 | /* OpenMP 2.5: | |
8254 | # pragma omp ordered new-line | |
8255 | structured-block | |
c2255bc4 AH |
8256 | |
8257 | LOC is the location of the #pragma itself. | |
953ff289 DN |
8258 | */ |
8259 | ||
8260 | static tree | |
c2255bc4 | 8261 | c_parser_omp_ordered (location_t loc, c_parser *parser) |
953ff289 DN |
8262 | { |
8263 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 8264 | return c_finish_omp_ordered (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
8265 | } |
8266 | ||
8267 | /* OpenMP 2.5: | |
8268 | ||
8269 | section-scope: | |
8270 | { section-sequence } | |
8271 | ||
8272 | section-sequence: | |
8273 | section-directive[opt] structured-block | |
c2255bc4 AH |
8274 | section-sequence section-directive structured-block |
8275 | ||
8276 | SECTIONS_LOC is the location of the #pragma omp sections. */ | |
953ff289 DN |
8277 | |
8278 | static tree | |
c2255bc4 | 8279 | c_parser_omp_sections_scope (location_t sections_loc, c_parser *parser) |
953ff289 DN |
8280 | { |
8281 | tree stmt, substmt; | |
8282 | bool error_suppress = false; | |
8283 | location_t loc; | |
8284 | ||
c2255bc4 | 8285 | loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8286 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
8287 | { | |
8288 | /* Avoid skipping until the end of the block. */ | |
8289 | parser->error = false; | |
8290 | return NULL_TREE; | |
8291 | } | |
8292 | ||
8293 | stmt = push_stmt_list (); | |
8294 | ||
953ff289 DN |
8295 | if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION) |
8296 | { | |
8297 | substmt = push_stmt_list (); | |
8298 | ||
8299 | while (1) | |
8300 | { | |
8301 | c_parser_statement (parser); | |
8302 | ||
8303 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
8304 | break; | |
8305 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8306 | break; | |
8307 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
8308 | break; | |
8309 | } | |
8310 | ||
8311 | substmt = pop_stmt_list (substmt); | |
8312 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
8313 | SET_EXPR_LOCATION (substmt, loc); | |
8314 | add_stmt (substmt); | |
8315 | } | |
8316 | ||
8317 | while (1) | |
8318 | { | |
8319 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
8320 | break; | |
8321 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
8322 | break; | |
8323 | ||
8324 | loc = c_parser_peek_token (parser)->location; | |
8325 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
8326 | { | |
8327 | c_parser_consume_pragma (parser); | |
8328 | c_parser_skip_to_pragma_eol (parser); | |
8329 | error_suppress = false; | |
8330 | } | |
8331 | else if (!error_suppress) | |
8332 | { | |
3ba09659 | 8333 | error_at (loc, "expected %<#pragma omp section%> or %<}%>"); |
953ff289 DN |
8334 | error_suppress = true; |
8335 | } | |
8336 | ||
8337 | substmt = c_parser_omp_structured_block (parser); | |
8338 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
8339 | SET_EXPR_LOCATION (substmt, loc); | |
8340 | add_stmt (substmt); | |
8341 | } | |
8342 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, | |
8343 | "expected %<#pragma omp section%> or %<}%>"); | |
8344 | ||
8345 | substmt = pop_stmt_list (stmt); | |
8346 | ||
8347 | stmt = make_node (OMP_SECTIONS); | |
c2255bc4 | 8348 | SET_EXPR_LOCATION (stmt, sections_loc); |
953ff289 DN |
8349 | TREE_TYPE (stmt) = void_type_node; |
8350 | OMP_SECTIONS_BODY (stmt) = substmt; | |
8351 | ||
8352 | return add_stmt (stmt); | |
8353 | } | |
8354 | ||
8355 | /* OpenMP 2.5: | |
8356 | # pragma omp sections sections-clause[optseq] newline | |
8357 | sections-scope | |
c2255bc4 AH |
8358 | |
8359 | LOC is the location of the #pragma token. | |
953ff289 DN |
8360 | */ |
8361 | ||
8362 | #define OMP_SECTIONS_CLAUSE_MASK \ | |
8363 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8364 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8365 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
8366 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8367 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
8368 | ||
8369 | static tree | |
c2255bc4 | 8370 | c_parser_omp_sections (location_t loc, c_parser *parser) |
953ff289 DN |
8371 | { |
8372 | tree block, clauses, ret; | |
8373 | ||
8374 | clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK, | |
8375 | "#pragma omp sections"); | |
8376 | ||
8377 | block = c_begin_compound_stmt (true); | |
c2255bc4 | 8378 | ret = c_parser_omp_sections_scope (loc, parser); |
953ff289 DN |
8379 | if (ret) |
8380 | OMP_SECTIONS_CLAUSES (ret) = clauses; | |
c2255bc4 | 8381 | block = c_end_compound_stmt (loc, block, true); |
953ff289 DN |
8382 | add_stmt (block); |
8383 | ||
8384 | return ret; | |
8385 | } | |
8386 | ||
8387 | /* OpenMP 2.5: | |
8388 | # pragma parallel parallel-clause new-line | |
8389 | # pragma parallel for parallel-for-clause new-line | |
8390 | # pragma parallel sections parallel-sections-clause new-line | |
c2255bc4 AH |
8391 | |
8392 | LOC is the location of the #pragma token. | |
953ff289 DN |
8393 | */ |
8394 | ||
8395 | #define OMP_PARALLEL_CLAUSE_MASK \ | |
8396 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
8397 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8398 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8399 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
8400 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ | |
8401 | | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \ | |
8402 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
8403 | | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS)) | |
8404 | ||
8405 | static tree | |
c2255bc4 | 8406 | c_parser_omp_parallel (location_t loc, c_parser *parser) |
953ff289 DN |
8407 | { |
8408 | enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL; | |
8409 | const char *p_name = "#pragma omp parallel"; | |
8410 | tree stmt, clauses, par_clause, ws_clause, block; | |
8411 | unsigned int mask = OMP_PARALLEL_CLAUSE_MASK; | |
8412 | ||
8413 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
8414 | { | |
8415 | c_parser_consume_token (parser); | |
8416 | p_kind = PRAGMA_OMP_PARALLEL_FOR; | |
8417 | p_name = "#pragma omp parallel for"; | |
8418 | mask |= OMP_FOR_CLAUSE_MASK; | |
8419 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8420 | } | |
8421 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
8422 | { | |
8423 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8424 | if (strcmp (p, "sections") == 0) | |
8425 | { | |
8426 | c_parser_consume_token (parser); | |
8427 | p_kind = PRAGMA_OMP_PARALLEL_SECTIONS; | |
8428 | p_name = "#pragma omp parallel sections"; | |
8429 | mask |= OMP_SECTIONS_CLAUSE_MASK; | |
8430 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8431 | } | |
8432 | } | |
8433 | ||
8434 | clauses = c_parser_omp_all_clauses (parser, mask, p_name); | |
8435 | ||
8436 | switch (p_kind) | |
8437 | { | |
8438 | case PRAGMA_OMP_PARALLEL: | |
8439 | block = c_begin_omp_parallel (); | |
8440 | c_parser_statement (parser); | |
c2255bc4 | 8441 | stmt = c_finish_omp_parallel (loc, clauses, block); |
953ff289 DN |
8442 | break; |
8443 | ||
8444 | case PRAGMA_OMP_PARALLEL_FOR: | |
8445 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
8446 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
8447 | c_parser_omp_for_loop (loc, parser, ws_clause, &par_clause); | |
8448 | stmt = c_finish_omp_parallel (loc, par_clause, block); | |
761041be | 8449 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8450 | break; |
8451 | ||
8452 | case PRAGMA_OMP_PARALLEL_SECTIONS: | |
8453 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
8454 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
8455 | stmt = c_parser_omp_sections_scope (loc, parser); | |
953ff289 DN |
8456 | if (stmt) |
8457 | OMP_SECTIONS_CLAUSES (stmt) = ws_clause; | |
c2255bc4 | 8458 | stmt = c_finish_omp_parallel (loc, par_clause, block); |
761041be | 8459 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8460 | break; |
8461 | ||
8462 | default: | |
8463 | gcc_unreachable (); | |
8464 | } | |
8465 | ||
8466 | return stmt; | |
8467 | } | |
8468 | ||
8469 | /* OpenMP 2.5: | |
8470 | # pragma omp single single-clause[optseq] new-line | |
8471 | structured-block | |
c2255bc4 AH |
8472 | |
8473 | LOC is the location of the #pragma. | |
953ff289 DN |
8474 | */ |
8475 | ||
8476 | #define OMP_SINGLE_CLAUSE_MASK \ | |
8477 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8478 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8479 | | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \ | |
8480 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
8481 | ||
8482 | static tree | |
c2255bc4 | 8483 | c_parser_omp_single (location_t loc, c_parser *parser) |
953ff289 DN |
8484 | { |
8485 | tree stmt = make_node (OMP_SINGLE); | |
c2255bc4 | 8486 | SET_EXPR_LOCATION (stmt, loc); |
953ff289 DN |
8487 | TREE_TYPE (stmt) = void_type_node; |
8488 | ||
8489 | OMP_SINGLE_CLAUSES (stmt) | |
8490 | = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK, | |
8491 | "#pragma omp single"); | |
8492 | OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser); | |
8493 | ||
8494 | return add_stmt (stmt); | |
8495 | } | |
8496 | ||
a68ab351 JJ |
8497 | /* OpenMP 3.0: |
8498 | # pragma omp task task-clause[optseq] new-line | |
c2255bc4 AH |
8499 | |
8500 | LOC is the location of the #pragma. | |
a68ab351 JJ |
8501 | */ |
8502 | ||
8503 | #define OMP_TASK_CLAUSE_MASK \ | |
8504 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
8505 | | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \ | |
8506 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
8507 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8508 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8509 | | (1u << PRAGMA_OMP_CLAUSE_SHARED)) | |
8510 | ||
8511 | static tree | |
c2255bc4 | 8512 | c_parser_omp_task (location_t loc, c_parser *parser) |
a68ab351 JJ |
8513 | { |
8514 | tree clauses, block; | |
8515 | ||
8516 | clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK, | |
8517 | "#pragma omp task"); | |
8518 | ||
8519 | block = c_begin_omp_task (); | |
8520 | c_parser_statement (parser); | |
c2255bc4 | 8521 | return c_finish_omp_task (loc, clauses, block); |
a68ab351 JJ |
8522 | } |
8523 | ||
8524 | /* OpenMP 3.0: | |
8525 | # pragma omp taskwait new-line | |
8526 | */ | |
8527 | ||
8528 | static void | |
8529 | c_parser_omp_taskwait (c_parser *parser) | |
8530 | { | |
c2255bc4 | 8531 | location_t loc = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
8532 | c_parser_consume_pragma (parser); |
8533 | c_parser_skip_to_pragma_eol (parser); | |
8534 | ||
c2255bc4 | 8535 | c_finish_omp_taskwait (loc); |
a68ab351 | 8536 | } |
953ff289 DN |
8537 | |
8538 | /* Main entry point to parsing most OpenMP pragmas. */ | |
8539 | ||
8540 | static void | |
8541 | c_parser_omp_construct (c_parser *parser) | |
8542 | { | |
8543 | enum pragma_kind p_kind; | |
8544 | location_t loc; | |
8545 | tree stmt; | |
8546 | ||
8547 | loc = c_parser_peek_token (parser)->location; | |
8548 | p_kind = c_parser_peek_token (parser)->pragma_kind; | |
8549 | c_parser_consume_pragma (parser); | |
8550 | ||
8551 | switch (p_kind) | |
8552 | { | |
8553 | case PRAGMA_OMP_ATOMIC: | |
c2255bc4 | 8554 | c_parser_omp_atomic (loc, parser); |
953ff289 DN |
8555 | return; |
8556 | case PRAGMA_OMP_CRITICAL: | |
c2255bc4 | 8557 | stmt = c_parser_omp_critical (loc, parser); |
953ff289 DN |
8558 | break; |
8559 | case PRAGMA_OMP_FOR: | |
c2255bc4 | 8560 | stmt = c_parser_omp_for (loc, parser); |
953ff289 DN |
8561 | break; |
8562 | case PRAGMA_OMP_MASTER: | |
c2255bc4 | 8563 | stmt = c_parser_omp_master (loc, parser); |
953ff289 DN |
8564 | break; |
8565 | case PRAGMA_OMP_ORDERED: | |
c2255bc4 | 8566 | stmt = c_parser_omp_ordered (loc, parser); |
953ff289 DN |
8567 | break; |
8568 | case PRAGMA_OMP_PARALLEL: | |
c2255bc4 | 8569 | stmt = c_parser_omp_parallel (loc, parser); |
953ff289 DN |
8570 | break; |
8571 | case PRAGMA_OMP_SECTIONS: | |
c2255bc4 | 8572 | stmt = c_parser_omp_sections (loc, parser); |
953ff289 DN |
8573 | break; |
8574 | case PRAGMA_OMP_SINGLE: | |
c2255bc4 | 8575 | stmt = c_parser_omp_single (loc, parser); |
953ff289 | 8576 | break; |
a68ab351 | 8577 | case PRAGMA_OMP_TASK: |
c2255bc4 | 8578 | stmt = c_parser_omp_task (loc, parser); |
a68ab351 | 8579 | break; |
953ff289 DN |
8580 | default: |
8581 | gcc_unreachable (); | |
8582 | } | |
8583 | ||
8584 | if (stmt) | |
c2255bc4 | 8585 | gcc_assert (EXPR_LOCATION (stmt) != UNKNOWN_LOCATION); |
953ff289 DN |
8586 | } |
8587 | ||
8588 | ||
8589 | /* OpenMP 2.5: | |
8590 | # pragma omp threadprivate (variable-list) */ | |
8591 | ||
8592 | static void | |
8593 | c_parser_omp_threadprivate (c_parser *parser) | |
8594 | { | |
8595 | tree vars, t; | |
c2255bc4 | 8596 | location_t loc; |
953ff289 DN |
8597 | |
8598 | c_parser_consume_pragma (parser); | |
c2255bc4 | 8599 | loc = c_parser_peek_token (parser)->location; |
d75d71e0 | 8600 | vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 | 8601 | |
953ff289 DN |
8602 | /* Mark every variable in VARS to be assigned thread local storage. */ |
8603 | for (t = vars; t; t = TREE_CHAIN (t)) | |
8604 | { | |
8605 | tree v = TREE_PURPOSE (t); | |
8606 | ||
c2255bc4 AH |
8607 | /* FIXME diagnostics: Ideally we should keep individual |
8608 | locations for all the variables in the var list to make the | |
8609 | following errors more precise. Perhaps | |
8610 | c_parser_omp_var_list_parens() should construct a list of | |
8611 | locations to go along with the var list. */ | |
8612 | ||
953ff289 DN |
8613 | /* If V had already been marked threadprivate, it doesn't matter |
8614 | whether it had been used prior to this point. */ | |
5df27e4a | 8615 | if (TREE_CODE (v) != VAR_DECL) |
c2255bc4 | 8616 | error_at (loc, "%qD is not a variable", v); |
5df27e4a | 8617 | else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v)) |
c2255bc4 | 8618 | error_at (loc, "%qE declared %<threadprivate%> after first use", v); |
953ff289 | 8619 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) |
c2255bc4 | 8620 | error_at (loc, "automatic variable %qE cannot be %<threadprivate%>", v); |
5df27e4a JJ |
8621 | else if (TREE_TYPE (v) == error_mark_node) |
8622 | ; | |
953ff289 | 8623 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) |
c2255bc4 | 8624 | error_at (loc, "%<threadprivate%> %qE has incomplete type", v); |
953ff289 DN |
8625 | else |
8626 | { | |
8627 | if (! DECL_THREAD_LOCAL_P (v)) | |
8628 | { | |
8629 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
8630 | /* If rtl has been already set for this var, call | |
8631 | make_decl_rtl once again, so that encode_section_info | |
8632 | has a chance to look at the new decl flags. */ | |
8633 | if (DECL_RTL_SET_P (v)) | |
8634 | make_decl_rtl (v); | |
8635 | } | |
8636 | C_DECL_THREADPRIVATE_P (v) = 1; | |
8637 | } | |
8638 | } | |
8639 | ||
8640 | c_parser_skip_to_pragma_eol (parser); | |
8641 | } | |
8642 | ||
bc4071dd | 8643 | \f |
27bf414c JM |
8644 | /* Parse a single source file. */ |
8645 | ||
8646 | void | |
8647 | c_parse_file (void) | |
8648 | { | |
bc4071dd RH |
8649 | /* Use local storage to begin. If the first token is a pragma, parse it. |
8650 | If it is #pragma GCC pch_preprocess, then this will load a PCH file | |
8651 | which will cause garbage collection. */ | |
8652 | c_parser tparser; | |
8653 | ||
8654 | memset (&tparser, 0, sizeof tparser); | |
8655 | the_parser = &tparser; | |
8656 | ||
8657 | if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS) | |
8658 | c_parser_pragma_pch_preprocess (&tparser); | |
8659 | ||
8660 | the_parser = GGC_NEW (c_parser); | |
8661 | *the_parser = tparser; | |
8662 | ||
f9417da1 RG |
8663 | /* Initialize EH, if we've been told to do so. */ |
8664 | if (flag_exceptions) | |
1d65f45c | 8665 | using_eh_for_cleanups (); |
f9417da1 | 8666 | |
27bf414c JM |
8667 | c_parser_translation_unit (the_parser); |
8668 | the_parser = NULL; | |
8669 | } | |
8670 | ||
8671 | #include "gt-c-parser.h" |