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27bf414c JM |
1 | /* Parser for C and Objective-C. |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
5df27e4a JJ |
3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 |
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" |
27bf414c JM |
60 | |
61 | \f | |
27bf414c JM |
62 | /* Initialization routine for this file. */ |
63 | ||
64 | void | |
65 | c_parse_init (void) | |
66 | { | |
67 | /* The only initialization required is of the reserved word | |
68 | identifiers. */ | |
69 | unsigned int i; | |
70 | tree id; | |
eea1139b | 71 | int mask = 0; |
27bf414c | 72 | |
eea1139b ILT |
73 | mask |= D_CXXONLY; |
74 | if (!flag_isoc99) | |
75 | mask |= D_C99; | |
76 | if (flag_no_asm) | |
77 | { | |
78 | mask |= D_ASM | D_EXT; | |
79 | if (!flag_isoc99) | |
80 | mask |= D_EXT89; | |
81 | } | |
27bf414c | 82 | if (!c_dialect_objc ()) |
eea1139b | 83 | mask |= D_OBJC | D_CXX_OBJC; |
27bf414c JM |
84 | |
85 | ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX); | |
eea1139b | 86 | for (i = 0; i < num_c_common_reswords; i++) |
27bf414c JM |
87 | { |
88 | /* If a keyword is disabled, do not enter it into the table | |
89 | and so create a canonical spelling that isn't a keyword. */ | |
eea1139b ILT |
90 | if (c_common_reswords[i].disable & mask) |
91 | { | |
92 | if (warn_cxx_compat | |
93 | && (c_common_reswords[i].disable & D_CXXWARN)) | |
94 | { | |
95 | id = get_identifier (c_common_reswords[i].word); | |
96 | C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN); | |
97 | C_IS_RESERVED_WORD (id) = 1; | |
98 | } | |
99 | continue; | |
100 | } | |
27bf414c | 101 | |
eea1139b ILT |
102 | id = get_identifier (c_common_reswords[i].word); |
103 | C_SET_RID_CODE (id, c_common_reswords[i].rid); | |
27bf414c | 104 | C_IS_RESERVED_WORD (id) = 1; |
eea1139b | 105 | ridpointers [(int) c_common_reswords[i].rid] = id; |
27bf414c JM |
106 | } |
107 | } | |
108 | \f | |
109 | /* The C lexer intermediates between the lexer in cpplib and c-lex.c | |
110 | and the C parser. Unlike the C++ lexer, the parser structure | |
111 | stores the lexer information instead of using a separate structure. | |
112 | Identifiers are separated into ordinary identifiers, type names, | |
113 | keywords and some other Objective-C types of identifiers, and some | |
114 | look-ahead is maintained. | |
115 | ||
116 | ??? It might be a good idea to lex the whole file up front (as for | |
117 | C++). It would then be possible to share more of the C and C++ | |
118 | lexer code, if desired. */ | |
119 | ||
120 | /* The following local token type is used. */ | |
121 | ||
122 | /* A keyword. */ | |
123 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
124 | ||
27bf414c JM |
125 | /* More information about the type of a CPP_NAME token. */ |
126 | typedef enum c_id_kind { | |
127 | /* An ordinary identifier. */ | |
128 | C_ID_ID, | |
129 | /* An identifier declared as a typedef name. */ | |
130 | C_ID_TYPENAME, | |
131 | /* An identifier declared as an Objective-C class name. */ | |
132 | C_ID_CLASSNAME, | |
133 | /* Not an identifier. */ | |
134 | C_ID_NONE | |
135 | } c_id_kind; | |
136 | ||
137 | /* A single C token after string literal concatenation and conversion | |
138 | of preprocessing tokens to tokens. */ | |
139 | typedef struct c_token GTY (()) | |
140 | { | |
141 | /* The kind of token. */ | |
142 | ENUM_BITFIELD (cpp_ttype) type : 8; | |
143 | /* If this token is a CPP_NAME, this value indicates whether also | |
144 | declared as some kind of type. Otherwise, it is C_ID_NONE. */ | |
145 | ENUM_BITFIELD (c_id_kind) id_kind : 8; | |
146 | /* If this token is a keyword, this value indicates which keyword. | |
147 | Otherwise, this value is RID_MAX. */ | |
148 | ENUM_BITFIELD (rid) keyword : 8; | |
bc4071dd RH |
149 | /* If this token is a CPP_PRAGMA, this indicates the pragma that |
150 | was seen. Otherwise it is PRAGMA_NONE. */ | |
151 | ENUM_BITFIELD (pragma_kind) pragma_kind : 7; | |
27bf414c JM |
152 | /* The value associated with this token, if any. */ |
153 | tree value; | |
154 | /* The location at which this token was found. */ | |
155 | location_t location; | |
156 | } c_token; | |
157 | ||
158 | /* A parser structure recording information about the state and | |
159 | context of parsing. Includes lexer information with up to two | |
160 | tokens of look-ahead; more are not needed for C. */ | |
161 | typedef struct c_parser GTY(()) | |
162 | { | |
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, | |
226 | "identifier %qs conflicts with C++ keyword", | |
227 | IDENTIFIER_POINTER (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), | |
575 | token->value); | |
576 | } | |
577 | ||
578 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
579 | issue the error MSGID. If MSGID is NULL then a message has already | |
580 | been produced and no message will be produced this time. Returns | |
581 | true if found, false otherwise. */ | |
582 | ||
583 | static bool | |
584 | c_parser_require (c_parser *parser, | |
585 | enum cpp_ttype type, | |
586 | const char *msgid) | |
587 | { | |
588 | if (c_parser_next_token_is (parser, type)) | |
589 | { | |
590 | c_parser_consume_token (parser); | |
591 | return true; | |
592 | } | |
593 | else | |
594 | { | |
595 | c_parser_error (parser, msgid); | |
596 | return false; | |
597 | } | |
598 | } | |
599 | ||
600 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
601 | issue the error MSGID. Returns true if found, false otherwise. */ | |
602 | ||
603 | static bool | |
604 | c_parser_require_keyword (c_parser *parser, | |
605 | enum rid keyword, | |
606 | const char *msgid) | |
607 | { | |
608 | if (c_parser_next_token_is_keyword (parser, keyword)) | |
609 | { | |
610 | c_parser_consume_token (parser); | |
611 | return true; | |
612 | } | |
613 | else | |
614 | { | |
615 | c_parser_error (parser, msgid); | |
616 | return false; | |
617 | } | |
618 | } | |
619 | ||
620 | /* Like c_parser_require, except that tokens will be skipped until the | |
621 | desired token is found. An error message is still produced if the | |
622 | next token is not as expected. If MSGID is NULL then a message has | |
623 | already been produced and no message will be produced this | |
624 | time. */ | |
625 | ||
626 | static void | |
627 | c_parser_skip_until_found (c_parser *parser, | |
628 | enum cpp_ttype type, | |
629 | const char *msgid) | |
630 | { | |
631 | unsigned nesting_depth = 0; | |
632 | ||
633 | if (c_parser_require (parser, type, msgid)) | |
634 | return; | |
635 | ||
636 | /* Skip tokens until the desired token is found. */ | |
637 | while (true) | |
638 | { | |
639 | /* Peek at the next token. */ | |
640 | c_token *token = c_parser_peek_token (parser); | |
641 | /* If we've reached the token we want, consume it and stop. */ | |
642 | if (token->type == type && !nesting_depth) | |
643 | { | |
644 | c_parser_consume_token (parser); | |
645 | break; | |
646 | } | |
bc4071dd | 647 | |
27bf414c JM |
648 | /* If we've run out of tokens, stop. */ |
649 | if (token->type == CPP_EOF) | |
650 | return; | |
bc4071dd RH |
651 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
652 | return; | |
27bf414c JM |
653 | if (token->type == CPP_OPEN_BRACE |
654 | || token->type == CPP_OPEN_PAREN | |
655 | || token->type == CPP_OPEN_SQUARE) | |
656 | ++nesting_depth; | |
657 | else if (token->type == CPP_CLOSE_BRACE | |
658 | || token->type == CPP_CLOSE_PAREN | |
659 | || token->type == CPP_CLOSE_SQUARE) | |
660 | { | |
661 | if (nesting_depth-- == 0) | |
662 | break; | |
663 | } | |
664 | /* Consume this token. */ | |
665 | c_parser_consume_token (parser); | |
666 | } | |
667 | parser->error = false; | |
668 | } | |
669 | ||
670 | /* Skip tokens until the end of a parameter is found, but do not | |
671 | consume the comma, semicolon or closing delimiter. */ | |
672 | ||
673 | static void | |
674 | c_parser_skip_to_end_of_parameter (c_parser *parser) | |
675 | { | |
676 | unsigned nesting_depth = 0; | |
677 | ||
678 | while (true) | |
679 | { | |
680 | c_token *token = c_parser_peek_token (parser); | |
681 | if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON) | |
682 | && !nesting_depth) | |
683 | break; | |
684 | /* If we've run out of tokens, stop. */ | |
685 | if (token->type == CPP_EOF) | |
686 | return; | |
bc4071dd RH |
687 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
688 | return; | |
27bf414c JM |
689 | if (token->type == CPP_OPEN_BRACE |
690 | || token->type == CPP_OPEN_PAREN | |
691 | || token->type == CPP_OPEN_SQUARE) | |
692 | ++nesting_depth; | |
693 | else if (token->type == CPP_CLOSE_BRACE | |
694 | || token->type == CPP_CLOSE_PAREN | |
695 | || token->type == CPP_CLOSE_SQUARE) | |
696 | { | |
697 | if (nesting_depth-- == 0) | |
698 | break; | |
699 | } | |
700 | /* Consume this token. */ | |
701 | c_parser_consume_token (parser); | |
702 | } | |
703 | parser->error = false; | |
704 | } | |
705 | ||
bc4071dd RH |
706 | /* Expect to be at the end of the pragma directive and consume an |
707 | end of line marker. */ | |
708 | ||
709 | static void | |
710 | c_parser_skip_to_pragma_eol (c_parser *parser) | |
711 | { | |
712 | gcc_assert (parser->in_pragma); | |
713 | parser->in_pragma = false; | |
714 | ||
715 | if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line")) | |
716 | while (true) | |
717 | { | |
718 | c_token *token = c_parser_peek_token (parser); | |
719 | if (token->type == CPP_EOF) | |
720 | break; | |
721 | if (token->type == CPP_PRAGMA_EOL) | |
722 | { | |
723 | c_parser_consume_token (parser); | |
724 | break; | |
725 | } | |
726 | c_parser_consume_token (parser); | |
727 | } | |
728 | ||
729 | parser->error = false; | |
730 | } | |
27bf414c | 731 | |
2a83cc52 RH |
732 | /* Skip tokens until we have consumed an entire block, or until we |
733 | have consumed a non-nested ';'. */ | |
734 | ||
735 | static void | |
736 | c_parser_skip_to_end_of_block_or_statement (c_parser *parser) | |
737 | { | |
738 | unsigned nesting_depth = 0; | |
739 | bool save_error = parser->error; | |
740 | ||
741 | while (true) | |
742 | { | |
743 | c_token *token; | |
744 | ||
745 | /* Peek at the next token. */ | |
746 | token = c_parser_peek_token (parser); | |
747 | ||
748 | switch (token->type) | |
749 | { | |
750 | case CPP_EOF: | |
751 | return; | |
752 | ||
753 | case CPP_PRAGMA_EOL: | |
754 | if (parser->in_pragma) | |
755 | return; | |
756 | break; | |
757 | ||
758 | case CPP_SEMICOLON: | |
759 | /* If the next token is a ';', we have reached the | |
760 | end of the statement. */ | |
761 | if (!nesting_depth) | |
762 | { | |
763 | /* Consume the ';'. */ | |
764 | c_parser_consume_token (parser); | |
765 | goto finished; | |
766 | } | |
767 | break; | |
768 | ||
769 | case CPP_CLOSE_BRACE: | |
770 | /* If the next token is a non-nested '}', then we have | |
771 | reached the end of the current block. */ | |
772 | if (nesting_depth == 0 || --nesting_depth == 0) | |
773 | { | |
774 | c_parser_consume_token (parser); | |
775 | goto finished; | |
776 | } | |
777 | break; | |
778 | ||
779 | case CPP_OPEN_BRACE: | |
780 | /* If it the next token is a '{', then we are entering a new | |
781 | block. Consume the entire block. */ | |
782 | ++nesting_depth; | |
783 | break; | |
784 | ||
785 | case CPP_PRAGMA: | |
786 | /* If we see a pragma, consume the whole thing at once. We | |
787 | have some safeguards against consuming pragmas willy-nilly. | |
788 | Normally, we'd expect to be here with parser->error set, | |
789 | which disables these safeguards. But it's possible to get | |
790 | here for secondary error recovery, after parser->error has | |
791 | been cleared. */ | |
792 | c_parser_consume_pragma (parser); | |
793 | c_parser_skip_to_pragma_eol (parser); | |
794 | parser->error = save_error; | |
795 | continue; | |
9e33de05 RS |
796 | |
797 | default: | |
798 | break; | |
2a83cc52 RH |
799 | } |
800 | ||
801 | c_parser_consume_token (parser); | |
802 | } | |
803 | ||
804 | finished: | |
805 | parser->error = false; | |
806 | } | |
807 | ||
d2e796ad MLI |
808 | /* CPP's options (initialized by c-opts.c). */ |
809 | extern cpp_options *cpp_opts; | |
810 | ||
27bf414c JM |
811 | /* Save the warning flags which are controlled by __extension__. */ |
812 | ||
813 | static inline int | |
814 | disable_extension_diagnostics (void) | |
815 | { | |
816 | int ret = (pedantic | |
817 | | (warn_pointer_arith << 1) | |
818 | | (warn_traditional << 2) | |
d2e796ad MLI |
819 | | (flag_iso << 3) |
820 | | (warn_long_long << 4) | |
821 | | (cpp_opts->warn_long_long << 5)); | |
822 | cpp_opts->pedantic = pedantic = 0; | |
27bf414c | 823 | warn_pointer_arith = 0; |
d2e796ad | 824 | cpp_opts->warn_traditional = warn_traditional = 0; |
27bf414c | 825 | flag_iso = 0; |
d2e796ad MLI |
826 | warn_long_long = 0; |
827 | cpp_opts->warn_long_long = 0; | |
27bf414c JM |
828 | return ret; |
829 | } | |
830 | ||
831 | /* Restore the warning flags which are controlled by __extension__. | |
832 | FLAGS is the return value from disable_extension_diagnostics. */ | |
833 | ||
834 | static inline void | |
835 | restore_extension_diagnostics (int flags) | |
836 | { | |
d2e796ad | 837 | cpp_opts->pedantic = pedantic = flags & 1; |
27bf414c | 838 | warn_pointer_arith = (flags >> 1) & 1; |
d2e796ad | 839 | cpp_opts->warn_traditional = warn_traditional = (flags >> 2) & 1; |
27bf414c | 840 | flag_iso = (flags >> 3) & 1; |
d2e796ad MLI |
841 | warn_long_long = (flags >> 4) & 1; |
842 | cpp_opts->warn_long_long = (flags >> 5) & 1; | |
27bf414c JM |
843 | } |
844 | ||
845 | /* Possibly kinds of declarator to parse. */ | |
846 | typedef enum c_dtr_syn { | |
847 | /* A normal declarator with an identifier. */ | |
848 | C_DTR_NORMAL, | |
849 | /* An abstract declarator (maybe empty). */ | |
850 | C_DTR_ABSTRACT, | |
851 | /* A parameter declarator: may be either, but after a type name does | |
852 | not redeclare a typedef name as an identifier if it can | |
853 | alternatively be interpreted as a typedef name; see DR#009, | |
854 | applied in C90 TC1, omitted from C99 and reapplied in C99 TC2 | |
855 | following DR#249. For example, given a typedef T, "int T" and | |
856 | "int *T" are valid parameter declarations redeclaring T, while | |
857 | "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are | |
858 | abstract declarators rather than involving redundant parentheses; | |
859 | the same applies with attributes inside the parentheses before | |
860 | "T". */ | |
861 | C_DTR_PARM | |
862 | } c_dtr_syn; | |
863 | ||
864 | static void c_parser_external_declaration (c_parser *); | |
865 | static void c_parser_asm_definition (c_parser *); | |
866 | static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, bool); | |
867 | static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool, | |
868 | bool); | |
869 | static struct c_typespec c_parser_enum_specifier (c_parser *); | |
870 | static struct c_typespec c_parser_struct_or_union_specifier (c_parser *); | |
871 | static tree c_parser_struct_declaration (c_parser *); | |
872 | static struct c_typespec c_parser_typeof_specifier (c_parser *); | |
873 | static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn, | |
874 | bool *); | |
875 | static struct c_declarator *c_parser_direct_declarator (c_parser *, bool, | |
876 | c_dtr_syn, bool *); | |
877 | static struct c_declarator *c_parser_direct_declarator_inner (c_parser *, | |
878 | bool, | |
879 | struct c_declarator *); | |
880 | static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree); | |
881 | static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree); | |
882 | static struct c_parm *c_parser_parameter_declaration (c_parser *, tree); | |
883 | static tree c_parser_simple_asm_expr (c_parser *); | |
884 | static tree c_parser_attributes (c_parser *); | |
885 | static struct c_type_name *c_parser_type_name (c_parser *); | |
886 | static struct c_expr c_parser_initializer (c_parser *); | |
887 | static struct c_expr c_parser_braced_init (c_parser *, tree, bool); | |
888 | static void c_parser_initelt (c_parser *); | |
889 | static void c_parser_initval (c_parser *, struct c_expr *); | |
890 | static tree c_parser_compound_statement (c_parser *); | |
891 | static void c_parser_compound_statement_nostart (c_parser *); | |
892 | static void c_parser_label (c_parser *); | |
893 | static void c_parser_statement (c_parser *); | |
894 | static void c_parser_statement_after_labels (c_parser *); | |
895 | static void c_parser_if_statement (c_parser *); | |
896 | static void c_parser_switch_statement (c_parser *); | |
897 | static void c_parser_while_statement (c_parser *); | |
898 | static void c_parser_do_statement (c_parser *); | |
899 | static void c_parser_for_statement (c_parser *); | |
900 | static tree c_parser_asm_statement (c_parser *); | |
46bdb9cf | 901 | static tree c_parser_asm_operands (c_parser *, bool); |
27bf414c JM |
902 | static tree c_parser_asm_clobbers (c_parser *); |
903 | static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *); | |
904 | static struct c_expr c_parser_conditional_expression (c_parser *, | |
905 | struct c_expr *); | |
906 | static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *); | |
907 | static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *); | |
908 | static struct c_expr c_parser_unary_expression (c_parser *); | |
909 | static struct c_expr c_parser_sizeof_expression (c_parser *); | |
910 | static struct c_expr c_parser_alignof_expression (c_parser *); | |
911 | static struct c_expr c_parser_postfix_expression (c_parser *); | |
912 | static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *, | |
913 | struct c_type_name *); | |
914 | static struct c_expr c_parser_postfix_expression_after_primary (c_parser *, | |
915 | struct c_expr); | |
916 | static struct c_expr c_parser_expression (c_parser *); | |
46bdb9cf JM |
917 | static struct c_expr c_parser_expression_conv (c_parser *); |
918 | static tree c_parser_expr_list (c_parser *, bool); | |
953ff289 DN |
919 | static void c_parser_omp_construct (c_parser *); |
920 | static void c_parser_omp_threadprivate (c_parser *); | |
921 | static void c_parser_omp_barrier (c_parser *); | |
922 | static void c_parser_omp_flush (c_parser *); | |
a68ab351 | 923 | static void c_parser_omp_taskwait (c_parser *); |
27bf414c | 924 | |
bc4071dd RH |
925 | enum pragma_context { pragma_external, pragma_stmt, pragma_compound }; |
926 | static bool c_parser_pragma (c_parser *, enum pragma_context); | |
927 | ||
27bf414c JM |
928 | /* These Objective-C parser functions are only ever called when |
929 | compiling Objective-C. */ | |
930 | static void c_parser_objc_class_definition (c_parser *); | |
931 | static void c_parser_objc_class_instance_variables (c_parser *); | |
932 | static void c_parser_objc_class_declaration (c_parser *); | |
933 | static void c_parser_objc_alias_declaration (c_parser *); | |
934 | static void c_parser_objc_protocol_definition (c_parser *); | |
935 | static enum tree_code c_parser_objc_method_type (c_parser *); | |
936 | static void c_parser_objc_method_definition (c_parser *); | |
937 | static void c_parser_objc_methodprotolist (c_parser *); | |
938 | static void c_parser_objc_methodproto (c_parser *); | |
939 | static tree c_parser_objc_method_decl (c_parser *); | |
940 | static tree c_parser_objc_type_name (c_parser *); | |
941 | static tree c_parser_objc_protocol_refs (c_parser *); | |
942 | static void c_parser_objc_try_catch_statement (c_parser *); | |
943 | static void c_parser_objc_synchronized_statement (c_parser *); | |
944 | static tree c_parser_objc_selector (c_parser *); | |
945 | static tree c_parser_objc_selector_arg (c_parser *); | |
946 | static tree c_parser_objc_receiver (c_parser *); | |
947 | static tree c_parser_objc_message_args (c_parser *); | |
948 | static tree c_parser_objc_keywordexpr (c_parser *); | |
949 | ||
950 | /* Parse a translation unit (C90 6.7, C99 6.9). | |
951 | ||
952 | translation-unit: | |
953 | external-declarations | |
954 | ||
955 | external-declarations: | |
956 | external-declaration | |
957 | external-declarations external-declaration | |
958 | ||
959 | GNU extensions: | |
960 | ||
961 | translation-unit: | |
962 | empty | |
963 | */ | |
964 | ||
965 | static void | |
966 | c_parser_translation_unit (c_parser *parser) | |
967 | { | |
968 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
969 | { | |
509c9d60 MLI |
970 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
971 | "ISO C forbids an empty translation unit"); | |
27bf414c JM |
972 | } |
973 | else | |
974 | { | |
975 | void *obstack_position = obstack_alloc (&parser_obstack, 0); | |
976 | do | |
977 | { | |
978 | ggc_collect (); | |
979 | c_parser_external_declaration (parser); | |
980 | obstack_free (&parser_obstack, obstack_position); | |
981 | } | |
982 | while (c_parser_next_token_is_not (parser, CPP_EOF)); | |
983 | } | |
984 | } | |
985 | ||
986 | /* Parse an external declaration (C90 6.7, C99 6.9). | |
987 | ||
988 | external-declaration: | |
989 | function-definition | |
990 | declaration | |
991 | ||
992 | GNU extensions: | |
993 | ||
994 | external-declaration: | |
995 | asm-definition | |
996 | ; | |
997 | __extension__ external-declaration | |
998 | ||
999 | Objective-C: | |
1000 | ||
1001 | external-declaration: | |
1002 | objc-class-definition | |
1003 | objc-class-declaration | |
1004 | objc-alias-declaration | |
1005 | objc-protocol-definition | |
1006 | objc-method-definition | |
1007 | @end | |
1008 | */ | |
1009 | ||
1010 | static void | |
1011 | c_parser_external_declaration (c_parser *parser) | |
1012 | { | |
1013 | int ext; | |
1014 | switch (c_parser_peek_token (parser)->type) | |
1015 | { | |
1016 | case CPP_KEYWORD: | |
1017 | switch (c_parser_peek_token (parser)->keyword) | |
1018 | { | |
1019 | case RID_EXTENSION: | |
1020 | ext = disable_extension_diagnostics (); | |
1021 | c_parser_consume_token (parser); | |
1022 | c_parser_external_declaration (parser); | |
1023 | restore_extension_diagnostics (ext); | |
1024 | break; | |
1025 | case RID_ASM: | |
1026 | c_parser_asm_definition (parser); | |
1027 | break; | |
1028 | case RID_AT_INTERFACE: | |
1029 | case RID_AT_IMPLEMENTATION: | |
1030 | gcc_assert (c_dialect_objc ()); | |
1031 | c_parser_objc_class_definition (parser); | |
1032 | break; | |
eea1139b | 1033 | case RID_CLASS: |
27bf414c JM |
1034 | gcc_assert (c_dialect_objc ()); |
1035 | c_parser_objc_class_declaration (parser); | |
1036 | break; | |
1037 | case RID_AT_ALIAS: | |
1038 | gcc_assert (c_dialect_objc ()); | |
1039 | c_parser_objc_alias_declaration (parser); | |
1040 | break; | |
1041 | case RID_AT_PROTOCOL: | |
1042 | gcc_assert (c_dialect_objc ()); | |
1043 | c_parser_objc_protocol_definition (parser); | |
1044 | break; | |
1045 | case RID_AT_END: | |
1046 | gcc_assert (c_dialect_objc ()); | |
1047 | c_parser_consume_token (parser); | |
1048 | objc_finish_implementation (); | |
1049 | break; | |
1050 | default: | |
1051 | goto decl_or_fndef; | |
1052 | } | |
1053 | break; | |
1054 | case CPP_SEMICOLON: | |
509c9d60 MLI |
1055 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
1056 | "ISO C does not allow extra %<;%> outside of a function"); | |
27bf414c JM |
1057 | c_parser_consume_token (parser); |
1058 | break; | |
bc4071dd RH |
1059 | case CPP_PRAGMA: |
1060 | c_parser_pragma (parser, pragma_external); | |
1061 | break; | |
27bf414c JM |
1062 | case CPP_PLUS: |
1063 | case CPP_MINUS: | |
1064 | if (c_dialect_objc ()) | |
1065 | { | |
1066 | c_parser_objc_method_definition (parser); | |
1067 | break; | |
1068 | } | |
1069 | /* Else fall through, and yield a syntax error trying to parse | |
1070 | as a declaration or function definition. */ | |
1071 | default: | |
1072 | decl_or_fndef: | |
1073 | /* A declaration or a function definition. We can only tell | |
1074 | which after parsing the declaration specifiers, if any, and | |
1075 | the first declarator. */ | |
1076 | c_parser_declaration_or_fndef (parser, true, true, false, true); | |
1077 | break; | |
1078 | } | |
1079 | } | |
1080 | ||
bc4071dd | 1081 | |
27bf414c JM |
1082 | /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99 |
1083 | 6.7, 6.9.1). If FNDEF_OK is true, a function definition is | |
1084 | accepted; otherwise (old-style parameter declarations) only other | |
1085 | declarations are accepted. If NESTED is true, we are inside a | |
1086 | function or parsing old-style parameter declarations; any functions | |
1087 | encountered are nested functions and declaration specifiers are | |
1088 | required; otherwise we are at top level and functions are normal | |
1089 | functions and declaration specifiers may be optional. If EMPTY_OK | |
1090 | is true, empty declarations are OK (subject to all other | |
1091 | constraints); otherwise (old-style parameter declarations) they are | |
1092 | diagnosed. If START_ATTR_OK is true, the declaration specifiers | |
1093 | may start with attributes; otherwise they may not. | |
1094 | ||
1095 | declaration: | |
1096 | declaration-specifiers init-declarator-list[opt] ; | |
1097 | ||
1098 | function-definition: | |
1099 | declaration-specifiers[opt] declarator declaration-list[opt] | |
1100 | compound-statement | |
1101 | ||
1102 | declaration-list: | |
1103 | declaration | |
1104 | declaration-list declaration | |
1105 | ||
1106 | init-declarator-list: | |
1107 | init-declarator | |
1108 | init-declarator-list , init-declarator | |
1109 | ||
1110 | init-declarator: | |
1111 | declarator simple-asm-expr[opt] attributes[opt] | |
1112 | declarator simple-asm-expr[opt] attributes[opt] = initializer | |
1113 | ||
1114 | GNU extensions: | |
1115 | ||
1116 | nested-function-definition: | |
1117 | declaration-specifiers declarator declaration-list[opt] | |
1118 | compound-statement | |
1119 | ||
1120 | The simple-asm-expr and attributes are GNU extensions. | |
1121 | ||
1122 | This function does not handle __extension__; that is handled in its | |
1123 | callers. ??? Following the old parser, __extension__ may start | |
1124 | external declarations, declarations in functions and declarations | |
1125 | at the start of "for" loops, but not old-style parameter | |
1126 | declarations. | |
1127 | ||
1128 | C99 requires declaration specifiers in a function definition; the | |
1129 | absence is diagnosed through the diagnosis of implicit int. In GNU | |
1130 | C we also allow but diagnose declarations without declaration | |
1131 | specifiers, but only at top level (elsewhere they conflict with | |
953ff289 DN |
1132 | other syntax). |
1133 | ||
1134 | OpenMP: | |
1135 | ||
1136 | declaration: | |
1137 | threadprivate-directive */ | |
27bf414c JM |
1138 | |
1139 | static void | |
1140 | c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, bool empty_ok, | |
1141 | bool nested, bool start_attr_ok) | |
1142 | { | |
1143 | struct c_declspecs *specs; | |
1144 | tree prefix_attrs; | |
1145 | tree all_prefix_attrs; | |
1146 | bool diagnosed_no_specs = false; | |
c7412148 | 1147 | location_t here = c_parser_peek_token (parser)->location; |
bc4071dd | 1148 | |
27bf414c JM |
1149 | specs = build_null_declspecs (); |
1150 | c_parser_declspecs (parser, specs, true, true, start_attr_ok); | |
1151 | if (parser->error) | |
1152 | { | |
1153 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1154 | return; | |
1155 | } | |
1156 | if (nested && !specs->declspecs_seen_p) | |
1157 | { | |
1158 | c_parser_error (parser, "expected declaration specifiers"); | |
1159 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1160 | return; | |
1161 | } | |
1162 | finish_declspecs (specs); | |
1163 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1164 | { | |
1165 | if (empty_ok) | |
1166 | shadow_tag (specs); | |
1167 | else | |
1168 | { | |
1169 | shadow_tag_warned (specs, 1); | |
509c9d60 | 1170 | pedwarn (here, 0, "empty declaration"); |
27bf414c JM |
1171 | } |
1172 | c_parser_consume_token (parser); | |
1173 | return; | |
1174 | } | |
1175 | pending_xref_error (); | |
1176 | prefix_attrs = specs->attrs; | |
1177 | all_prefix_attrs = prefix_attrs; | |
1178 | specs->attrs = NULL_TREE; | |
1179 | while (true) | |
1180 | { | |
1181 | struct c_declarator *declarator; | |
1182 | bool dummy = false; | |
1183 | tree fnbody; | |
1184 | /* Declaring either one or more declarators (in which case we | |
1185 | should diagnose if there were no declaration specifiers) or a | |
1186 | function definition (in which case the diagnostic for | |
1187 | implicit int suffices). */ | |
1188 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
1189 | C_DTR_NORMAL, &dummy); | |
1190 | if (declarator == NULL) | |
1191 | { | |
1192 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1193 | return; | |
1194 | } | |
1195 | if (c_parser_next_token_is (parser, CPP_EQ) | |
1196 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1197 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1198 | || c_parser_next_token_is_keyword (parser, RID_ASM) | |
1199 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1200 | { | |
1201 | tree asm_name = NULL_TREE; | |
1202 | tree postfix_attrs = NULL_TREE; | |
1203 | if (!diagnosed_no_specs && !specs->declspecs_seen_p) | |
1204 | { | |
1205 | diagnosed_no_specs = true; | |
509c9d60 | 1206 | pedwarn (here, 0, "data definition has no type or storage class"); |
27bf414c JM |
1207 | } |
1208 | /* Having seen a data definition, there cannot now be a | |
1209 | function definition. */ | |
1210 | fndef_ok = false; | |
1211 | if (c_parser_next_token_is_keyword (parser, RID_ASM)) | |
1212 | asm_name = c_parser_simple_asm_expr (parser); | |
1213 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1214 | postfix_attrs = c_parser_attributes (parser); | |
1215 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1216 | { | |
1217 | tree d; | |
1218 | struct c_expr init; | |
1219 | c_parser_consume_token (parser); | |
1220 | /* The declaration of the variable is in effect while | |
1221 | its initializer is parsed. */ | |
1222 | d = start_decl (declarator, specs, true, | |
1223 | chainon (postfix_attrs, all_prefix_attrs)); | |
1224 | if (!d) | |
1225 | d = error_mark_node; | |
1226 | start_init (d, asm_name, global_bindings_p ()); | |
1227 | init = c_parser_initializer (parser); | |
1228 | finish_init (); | |
1229 | if (d != error_mark_node) | |
1230 | { | |
1231 | maybe_warn_string_init (TREE_TYPE (d), init); | |
1232 | finish_decl (d, init.value, asm_name); | |
1233 | } | |
1234 | } | |
1235 | else | |
1236 | { | |
1237 | tree d = start_decl (declarator, specs, false, | |
1238 | chainon (postfix_attrs, | |
1239 | all_prefix_attrs)); | |
1240 | if (d) | |
1241 | finish_decl (d, NULL_TREE, asm_name); | |
1242 | } | |
1243 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1244 | { | |
1245 | c_parser_consume_token (parser); | |
1246 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1247 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
1248 | prefix_attrs); | |
1249 | else | |
1250 | all_prefix_attrs = prefix_attrs; | |
1251 | continue; | |
1252 | } | |
1253 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1254 | { | |
1255 | c_parser_consume_token (parser); | |
1256 | return; | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | c_parser_error (parser, "expected %<,%> or %<;%>"); | |
1261 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1262 | return; | |
1263 | } | |
1264 | } | |
1265 | else if (!fndef_ok) | |
1266 | { | |
1267 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, " | |
1268 | "%<asm%> or %<__attribute__%>"); | |
1269 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1270 | return; | |
1271 | } | |
1272 | /* Function definition (nested or otherwise). */ | |
1273 | if (nested) | |
1274 | { | |
509c9d60 | 1275 | pedwarn (here, OPT_pedantic, "ISO C forbids nested functions"); |
d2784db4 | 1276 | c_push_function_context (); |
27bf414c JM |
1277 | } |
1278 | if (!start_function (specs, declarator, all_prefix_attrs)) | |
1279 | { | |
1280 | /* This can appear in many cases looking nothing like a | |
1281 | function definition, so we don't give a more specific | |
1282 | error suggesting there was one. */ | |
1283 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> " | |
1284 | "or %<__attribute__%>"); | |
1285 | if (nested) | |
d2784db4 | 1286 | c_pop_function_context (); |
27bf414c JM |
1287 | break; |
1288 | } | |
1289 | /* Parse old-style parameter declarations. ??? Attributes are | |
1290 | not allowed to start declaration specifiers here because of a | |
1291 | syntax conflict between a function declaration with attribute | |
1292 | suffix and a function definition with an attribute prefix on | |
1293 | first old-style parameter declaration. Following the old | |
1294 | parser, they are not accepted on subsequent old-style | |
1295 | parameter declarations either. However, there is no | |
1296 | ambiguity after the first declaration, nor indeed on the | |
1297 | first as long as we don't allow postfix attributes after a | |
1298 | declarator with a nonempty identifier list in a definition; | |
1299 | and postfix attributes have never been accepted here in | |
1300 | function definitions either. */ | |
1301 | while (c_parser_next_token_is_not (parser, CPP_EOF) | |
1302 | && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE)) | |
1303 | c_parser_declaration_or_fndef (parser, false, false, true, false); | |
27bf414c | 1304 | store_parm_decls (); |
1751ecd6 AH |
1305 | DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus |
1306 | = c_parser_peek_token (parser)->location; | |
27bf414c JM |
1307 | fnbody = c_parser_compound_statement (parser); |
1308 | if (nested) | |
1309 | { | |
1310 | tree decl = current_function_decl; | |
1311 | add_stmt (fnbody); | |
1312 | finish_function (); | |
d2784db4 | 1313 | c_pop_function_context (); |
27bf414c JM |
1314 | add_stmt (build_stmt (DECL_EXPR, decl)); |
1315 | } | |
1316 | else | |
1317 | { | |
1318 | add_stmt (fnbody); | |
1319 | finish_function (); | |
1320 | } | |
1321 | break; | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /* Parse an asm-definition (asm() outside a function body). This is a | |
1326 | GNU extension. | |
1327 | ||
1328 | asm-definition: | |
1329 | simple-asm-expr ; | |
1330 | */ | |
1331 | ||
1332 | static void | |
1333 | c_parser_asm_definition (c_parser *parser) | |
1334 | { | |
1335 | tree asm_str = c_parser_simple_asm_expr (parser); | |
27bf414c | 1336 | if (asm_str) |
474eccc6 | 1337 | cgraph_add_asm_node (asm_str); |
27bf414c JM |
1338 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1339 | } | |
1340 | ||
1341 | /* Parse some declaration specifiers (possibly none) (C90 6.5, C99 | |
1342 | 6.7), adding them to SPECS (which may already include some). | |
1343 | Storage class specifiers are accepted iff SCSPEC_OK; type | |
1344 | specifiers are accepted iff TYPESPEC_OK; attributes are accepted at | |
1345 | the start iff START_ATTR_OK. | |
1346 | ||
1347 | declaration-specifiers: | |
1348 | storage-class-specifier declaration-specifiers[opt] | |
1349 | type-specifier declaration-specifiers[opt] | |
1350 | type-qualifier declaration-specifiers[opt] | |
1351 | function-specifier declaration-specifiers[opt] | |
1352 | ||
1353 | Function specifiers (inline) are from C99, and are currently | |
1354 | handled as storage class specifiers, as is __thread. | |
1355 | ||
1356 | C90 6.5.1, C99 6.7.1: | |
1357 | storage-class-specifier: | |
1358 | typedef | |
1359 | extern | |
1360 | static | |
1361 | auto | |
1362 | register | |
1363 | ||
1364 | C99 6.7.4: | |
1365 | function-specifier: | |
1366 | inline | |
1367 | ||
1368 | C90 6.5.2, C99 6.7.2: | |
1369 | type-specifier: | |
1370 | void | |
1371 | char | |
1372 | short | |
1373 | int | |
1374 | long | |
1375 | float | |
1376 | double | |
1377 | signed | |
1378 | unsigned | |
1379 | _Bool | |
1380 | _Complex | |
1381 | [_Imaginary removed in C99 TC2] | |
1382 | struct-or-union-specifier | |
1383 | enum-specifier | |
1384 | typedef-name | |
1385 | ||
1386 | (_Bool and _Complex are new in C99.) | |
1387 | ||
1388 | C90 6.5.3, C99 6.7.3: | |
1389 | ||
1390 | type-qualifier: | |
1391 | const | |
1392 | restrict | |
1393 | volatile | |
1394 | ||
1395 | (restrict is new in C99.) | |
1396 | ||
1397 | GNU extensions: | |
1398 | ||
1399 | declaration-specifiers: | |
1400 | attributes declaration-specifiers[opt] | |
1401 | ||
1402 | storage-class-specifier: | |
1403 | __thread | |
1404 | ||
1405 | type-specifier: | |
1406 | typeof-specifier | |
9a8ce21f JG |
1407 | _Decimal32 |
1408 | _Decimal64 | |
1409 | _Decimal128 | |
ab22c1fa CF |
1410 | _Fract |
1411 | _Accum | |
1412 | _Sat | |
1413 | ||
1414 | (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037: | |
1415 | http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) | |
27bf414c JM |
1416 | |
1417 | Objective-C: | |
1418 | ||
1419 | type-specifier: | |
1420 | class-name objc-protocol-refs[opt] | |
1421 | typedef-name objc-protocol-refs | |
1422 | objc-protocol-refs | |
1423 | */ | |
1424 | ||
1425 | static void | |
1426 | c_parser_declspecs (c_parser *parser, struct c_declspecs *specs, | |
1427 | bool scspec_ok, bool typespec_ok, bool start_attr_ok) | |
1428 | { | |
1429 | bool attrs_ok = start_attr_ok; | |
1430 | bool seen_type = specs->type_seen_p; | |
1431 | while (c_parser_next_token_is (parser, CPP_NAME) | |
1432 | || c_parser_next_token_is (parser, CPP_KEYWORD) | |
1433 | || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS))) | |
1434 | { | |
1435 | struct c_typespec t; | |
1436 | tree attrs; | |
1437 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
1438 | { | |
1439 | tree value = c_parser_peek_token (parser)->value; | |
1440 | c_id_kind kind = c_parser_peek_token (parser)->id_kind; | |
1441 | /* This finishes the specifiers unless a type name is OK, it | |
1442 | is declared as a type name and a type name hasn't yet | |
1443 | been seen. */ | |
1444 | if (!typespec_ok || seen_type | |
1445 | || (kind != C_ID_TYPENAME && kind != C_ID_CLASSNAME)) | |
1446 | break; | |
1447 | c_parser_consume_token (parser); | |
1448 | seen_type = true; | |
1449 | attrs_ok = true; | |
1450 | if (kind == C_ID_TYPENAME | |
1451 | && (!c_dialect_objc () | |
1452 | || c_parser_next_token_is_not (parser, CPP_LESS))) | |
1453 | { | |
1454 | t.kind = ctsk_typedef; | |
1455 | /* For a typedef name, record the meaning, not the name. | |
1456 | In case of 'foo foo, bar;'. */ | |
1457 | t.spec = lookup_name (value); | |
1458 | } | |
1459 | else | |
1460 | { | |
1461 | tree proto = NULL_TREE; | |
1462 | gcc_assert (c_dialect_objc ()); | |
1463 | t.kind = ctsk_objc; | |
1464 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1465 | proto = c_parser_objc_protocol_refs (parser); | |
1466 | t.spec = objc_get_protocol_qualified_type (value, proto); | |
1467 | } | |
1468 | declspecs_add_type (specs, t); | |
1469 | continue; | |
1470 | } | |
1471 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
1472 | { | |
1473 | /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" - | |
1474 | nisse@lysator.liu.se. */ | |
1475 | tree proto; | |
1476 | gcc_assert (c_dialect_objc ()); | |
1477 | if (!typespec_ok || seen_type) | |
1478 | break; | |
1479 | proto = c_parser_objc_protocol_refs (parser); | |
1480 | t.kind = ctsk_objc; | |
1481 | t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto); | |
1482 | declspecs_add_type (specs, t); | |
1483 | continue; | |
1484 | } | |
1485 | gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD)); | |
1486 | switch (c_parser_peek_token (parser)->keyword) | |
1487 | { | |
1488 | case RID_STATIC: | |
1489 | case RID_EXTERN: | |
1490 | case RID_REGISTER: | |
1491 | case RID_TYPEDEF: | |
1492 | case RID_INLINE: | |
1493 | case RID_AUTO: | |
1494 | case RID_THREAD: | |
1495 | if (!scspec_ok) | |
1496 | goto out; | |
1497 | attrs_ok = true; | |
1498 | /* TODO: Distinguish between function specifiers (inline) | |
1499 | and storage class specifiers, either here or in | |
1500 | declspecs_add_scspec. */ | |
1501 | declspecs_add_scspec (specs, c_parser_peek_token (parser)->value); | |
1502 | c_parser_consume_token (parser); | |
1503 | break; | |
1504 | case RID_UNSIGNED: | |
1505 | case RID_LONG: | |
1506 | case RID_SHORT: | |
1507 | case RID_SIGNED: | |
1508 | case RID_COMPLEX: | |
1509 | case RID_INT: | |
1510 | case RID_CHAR: | |
1511 | case RID_FLOAT: | |
1512 | case RID_DOUBLE: | |
1513 | case RID_VOID: | |
9a8ce21f JG |
1514 | case RID_DFLOAT32: |
1515 | case RID_DFLOAT64: | |
1516 | case RID_DFLOAT128: | |
27bf414c | 1517 | case RID_BOOL: |
ab22c1fa CF |
1518 | case RID_FRACT: |
1519 | case RID_ACCUM: | |
1520 | case RID_SAT: | |
27bf414c JM |
1521 | if (!typespec_ok) |
1522 | goto out; | |
1523 | attrs_ok = true; | |
1524 | seen_type = true; | |
0bacb8c7 TT |
1525 | if (c_dialect_objc ()) |
1526 | parser->objc_need_raw_identifier = true; | |
27bf414c JM |
1527 | t.kind = ctsk_resword; |
1528 | t.spec = c_parser_peek_token (parser)->value; | |
1529 | declspecs_add_type (specs, t); | |
1530 | c_parser_consume_token (parser); | |
1531 | break; | |
1532 | case RID_ENUM: | |
1533 | if (!typespec_ok) | |
1534 | goto out; | |
1535 | attrs_ok = true; | |
1536 | seen_type = true; | |
1537 | t = c_parser_enum_specifier (parser); | |
1538 | declspecs_add_type (specs, t); | |
1539 | break; | |
1540 | case RID_STRUCT: | |
1541 | case RID_UNION: | |
1542 | if (!typespec_ok) | |
1543 | goto out; | |
1544 | attrs_ok = true; | |
1545 | seen_type = true; | |
1546 | t = c_parser_struct_or_union_specifier (parser); | |
1547 | declspecs_add_type (specs, t); | |
1548 | break; | |
1549 | case RID_TYPEOF: | |
1550 | /* ??? The old parser rejected typeof after other type | |
1551 | specifiers, but is a syntax error the best way of | |
1552 | handling this? */ | |
1553 | if (!typespec_ok || seen_type) | |
1554 | goto out; | |
1555 | attrs_ok = true; | |
1556 | seen_type = true; | |
1557 | t = c_parser_typeof_specifier (parser); | |
1558 | declspecs_add_type (specs, t); | |
1559 | break; | |
1560 | case RID_CONST: | |
1561 | case RID_VOLATILE: | |
1562 | case RID_RESTRICT: | |
1563 | attrs_ok = true; | |
1564 | declspecs_add_qual (specs, c_parser_peek_token (parser)->value); | |
1565 | c_parser_consume_token (parser); | |
1566 | break; | |
1567 | case RID_ATTRIBUTE: | |
1568 | if (!attrs_ok) | |
1569 | goto out; | |
1570 | attrs = c_parser_attributes (parser); | |
1571 | declspecs_add_attrs (specs, attrs); | |
1572 | break; | |
1573 | default: | |
1574 | goto out; | |
1575 | } | |
1576 | } | |
1577 | out: ; | |
1578 | } | |
1579 | ||
1580 | /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2). | |
1581 | ||
1582 | enum-specifier: | |
1583 | enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt] | |
1584 | enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt] | |
1585 | enum attributes[opt] identifier | |
1586 | ||
1587 | The form with trailing comma is new in C99. The forms with | |
1588 | attributes are GNU extensions. In GNU C, we accept any expression | |
1589 | without commas in the syntax (assignment expressions, not just | |
1590 | conditional expressions); assignment expressions will be diagnosed | |
1591 | as non-constant. | |
1592 | ||
1593 | enumerator-list: | |
1594 | enumerator | |
1595 | enumerator-list , enumerator | |
1596 | ||
1597 | enumerator: | |
1598 | enumeration-constant | |
1599 | enumeration-constant = constant-expression | |
1600 | */ | |
1601 | ||
1602 | static struct c_typespec | |
1603 | c_parser_enum_specifier (c_parser *parser) | |
1604 | { | |
1605 | struct c_typespec ret; | |
1606 | tree attrs; | |
1607 | tree ident = NULL_TREE; | |
c7412148 | 1608 | location_t ident_loc; |
27bf414c JM |
1609 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM)); |
1610 | c_parser_consume_token (parser); | |
1611 | attrs = c_parser_attributes (parser); | |
5af28c74 TT |
1612 | /* Set the location in case we create a decl now. */ |
1613 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
27bf414c JM |
1614 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1615 | { | |
1616 | ident = c_parser_peek_token (parser)->value; | |
c7412148 | 1617 | ident_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1618 | c_parser_consume_token (parser); |
1619 | } | |
1620 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1621 | { | |
1622 | /* Parse an enum definition. */ | |
7114359f TT |
1623 | struct c_enum_contents the_enum; |
1624 | tree type = start_enum (&the_enum, ident); | |
27bf414c JM |
1625 | tree postfix_attrs; |
1626 | /* We chain the enumerators in reverse order, then put them in | |
1627 | forward order at the end. */ | |
1628 | tree values = NULL_TREE; | |
1629 | c_parser_consume_token (parser); | |
1630 | while (true) | |
1631 | { | |
1632 | tree enum_id; | |
1633 | tree enum_value; | |
1634 | tree enum_decl; | |
1635 | bool seen_comma; | |
5af28c74 | 1636 | c_token *token; |
c7412148 | 1637 | location_t comma_loc; |
85790e66 | 1638 | location_t value_loc; |
27bf414c JM |
1639 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
1640 | { | |
1641 | c_parser_error (parser, "expected identifier"); | |
1642 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1643 | values = error_mark_node; | |
1644 | break; | |
1645 | } | |
5af28c74 TT |
1646 | token = c_parser_peek_token (parser); |
1647 | enum_id = token->value; | |
1648 | /* Set the location in case we create a decl now. */ | |
1649 | c_parser_set_source_position_from_token (token); | |
85790e66 | 1650 | value_loc = token->location; |
27bf414c JM |
1651 | c_parser_consume_token (parser); |
1652 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1653 | { | |
1654 | c_parser_consume_token (parser); | |
85790e66 | 1655 | value_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1656 | enum_value = c_parser_expr_no_commas (parser, NULL).value; |
1657 | } | |
1658 | else | |
1659 | enum_value = NULL_TREE; | |
85790e66 MLI |
1660 | enum_decl = build_enumerator (&the_enum, enum_id, enum_value, |
1661 | value_loc); | |
27bf414c JM |
1662 | TREE_CHAIN (enum_decl) = values; |
1663 | values = enum_decl; | |
1664 | seen_comma = false; | |
1665 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1666 | { | |
c7412148 | 1667 | comma_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1668 | seen_comma = true; |
1669 | c_parser_consume_token (parser); | |
1670 | } | |
1671 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1672 | { | |
fcf73884 | 1673 | if (seen_comma && !flag_isoc99) |
509c9d60 | 1674 | pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list"); |
27bf414c JM |
1675 | c_parser_consume_token (parser); |
1676 | break; | |
1677 | } | |
1678 | if (!seen_comma) | |
1679 | { | |
1680 | c_parser_error (parser, "expected %<,%> or %<}%>"); | |
1681 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1682 | values = error_mark_node; | |
1683 | break; | |
1684 | } | |
1685 | } | |
1686 | postfix_attrs = c_parser_attributes (parser); | |
1687 | ret.spec = finish_enum (type, nreverse (values), | |
1688 | chainon (attrs, postfix_attrs)); | |
1689 | ret.kind = ctsk_tagdef; | |
1690 | return ret; | |
1691 | } | |
1692 | else if (!ident) | |
1693 | { | |
1694 | c_parser_error (parser, "expected %<{%>"); | |
1695 | ret.spec = error_mark_node; | |
1696 | ret.kind = ctsk_tagref; | |
1697 | return ret; | |
1698 | } | |
1699 | ret = parser_xref_tag (ENUMERAL_TYPE, ident); | |
1700 | /* In ISO C, enumerated types can be referred to only if already | |
1701 | defined. */ | |
1702 | if (pedantic && !COMPLETE_TYPE_P (ret.spec)) | |
c7412148 TT |
1703 | { |
1704 | gcc_assert (ident); | |
509c9d60 MLI |
1705 | pedwarn (ident_loc, OPT_pedantic, |
1706 | "ISO C forbids forward references to %<enum%> types"); | |
c7412148 | 1707 | } |
27bf414c JM |
1708 | return ret; |
1709 | } | |
1710 | ||
1711 | /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1). | |
1712 | ||
1713 | struct-or-union-specifier: | |
1714 | struct-or-union attributes[opt] identifier[opt] | |
1715 | { struct-contents } attributes[opt] | |
1716 | struct-or-union attributes[opt] identifier | |
1717 | ||
1718 | struct-contents: | |
1719 | struct-declaration-list | |
1720 | ||
1721 | struct-declaration-list: | |
1722 | struct-declaration ; | |
1723 | struct-declaration-list struct-declaration ; | |
1724 | ||
1725 | GNU extensions: | |
1726 | ||
1727 | struct-contents: | |
1728 | empty | |
1729 | struct-declaration | |
1730 | struct-declaration-list struct-declaration | |
1731 | ||
1732 | struct-declaration-list: | |
1733 | struct-declaration-list ; | |
1734 | ; | |
1735 | ||
1736 | (Note that in the syntax here, unlike that in ISO C, the semicolons | |
1737 | are included here rather than in struct-declaration, in order to | |
1738 | describe the syntax with extra semicolons and missing semicolon at | |
1739 | end.) | |
1740 | ||
1741 | Objective-C: | |
1742 | ||
1743 | struct-declaration-list: | |
1744 | @defs ( class-name ) | |
1745 | ||
1746 | (Note this does not include a trailing semicolon, but can be | |
1747 | followed by further declarations, and gets a pedwarn-if-pedantic | |
1748 | when followed by a semicolon.) */ | |
1749 | ||
1750 | static struct c_typespec | |
1751 | c_parser_struct_or_union_specifier (c_parser *parser) | |
1752 | { | |
1753 | struct c_typespec ret; | |
1754 | tree attrs; | |
1755 | tree ident = NULL_TREE; | |
1756 | enum tree_code code; | |
1757 | switch (c_parser_peek_token (parser)->keyword) | |
1758 | { | |
1759 | case RID_STRUCT: | |
1760 | code = RECORD_TYPE; | |
1761 | break; | |
1762 | case RID_UNION: | |
1763 | code = UNION_TYPE; | |
1764 | break; | |
1765 | default: | |
1766 | gcc_unreachable (); | |
1767 | } | |
1768 | c_parser_consume_token (parser); | |
1769 | attrs = c_parser_attributes (parser); | |
5af28c74 TT |
1770 | /* Set the location in case we create a decl now. */ |
1771 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
27bf414c JM |
1772 | if (c_parser_next_token_is (parser, CPP_NAME)) |
1773 | { | |
1774 | ident = c_parser_peek_token (parser)->value; | |
1775 | c_parser_consume_token (parser); | |
1776 | } | |
1777 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
1778 | { | |
1779 | /* Parse a struct or union definition. Start the scope of the | |
1780 | tag before parsing components. */ | |
1781 | tree type = start_struct (code, ident); | |
1782 | tree postfix_attrs; | |
1783 | /* We chain the components in reverse order, then put them in | |
1784 | forward order at the end. Each struct-declaration may | |
1785 | declare multiple components (comma-separated), so we must use | |
1786 | chainon to join them, although when parsing each | |
1787 | struct-declaration we can use TREE_CHAIN directly. | |
1788 | ||
1789 | The theory behind all this is that there will be more | |
1790 | semicolon separated fields than comma separated fields, and | |
1791 | so we'll be minimizing the number of node traversals required | |
1792 | by chainon. */ | |
1793 | tree contents = NULL_TREE; | |
1794 | c_parser_consume_token (parser); | |
1795 | /* Handle the Objective-C @defs construct, | |
1796 | e.g. foo(sizeof(struct{ @defs(ClassName) }));. */ | |
1797 | if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS)) | |
1798 | { | |
1799 | tree name; | |
1800 | gcc_assert (c_dialect_objc ()); | |
1801 | c_parser_consume_token (parser); | |
1802 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
1803 | goto end_at_defs; | |
1804 | if (c_parser_next_token_is (parser, CPP_NAME) | |
1805 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME) | |
1806 | { | |
1807 | name = c_parser_peek_token (parser)->value; | |
1808 | c_parser_consume_token (parser); | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | c_parser_error (parser, "expected class name"); | |
1813 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
1814 | goto end_at_defs; | |
1815 | } | |
1816 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
1817 | "expected %<)%>"); | |
1818 | contents = nreverse (objc_get_class_ivars (name)); | |
1819 | } | |
1820 | end_at_defs: | |
1821 | /* Parse the struct-declarations and semicolons. Problems with | |
1822 | semicolons are diagnosed here; empty structures are diagnosed | |
1823 | elsewhere. */ | |
1824 | while (true) | |
1825 | { | |
1826 | tree decls; | |
1827 | /* Parse any stray semicolon. */ | |
1828 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1829 | { | |
509c9d60 MLI |
1830 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
1831 | "extra semicolon in struct or union specified"); | |
27bf414c JM |
1832 | c_parser_consume_token (parser); |
1833 | continue; | |
1834 | } | |
1835 | /* Stop if at the end of the struct or union contents. */ | |
1836 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1837 | { | |
1838 | c_parser_consume_token (parser); | |
1839 | break; | |
1840 | } | |
bc4071dd RH |
1841 | /* Accept #pragmas at struct scope. */ |
1842 | if (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
1843 | { | |
1844 | c_parser_pragma (parser, pragma_external); | |
1845 | continue; | |
1846 | } | |
27bf414c JM |
1847 | /* Parse some comma-separated declarations, but not the |
1848 | trailing semicolon if any. */ | |
1849 | decls = c_parser_struct_declaration (parser); | |
1850 | contents = chainon (decls, contents); | |
1851 | /* If no semicolon follows, either we have a parse error or | |
1852 | are at the end of the struct or union and should | |
1853 | pedwarn. */ | |
1854 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1855 | c_parser_consume_token (parser); | |
1856 | else | |
1857 | { | |
1858 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
509c9d60 MLI |
1859 | pedwarn (c_parser_peek_token (parser)->location, 0, |
1860 | "no semicolon at end of struct or union"); | |
27bf414c JM |
1861 | else |
1862 | { | |
1863 | c_parser_error (parser, "expected %<;%>"); | |
1864 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
1865 | break; | |
1866 | } | |
1867 | } | |
1868 | } | |
1869 | postfix_attrs = c_parser_attributes (parser); | |
1870 | ret.spec = finish_struct (type, nreverse (contents), | |
1871 | chainon (attrs, postfix_attrs)); | |
1872 | ret.kind = ctsk_tagdef; | |
1873 | return ret; | |
1874 | } | |
1875 | else if (!ident) | |
1876 | { | |
1877 | c_parser_error (parser, "expected %<{%>"); | |
1878 | ret.spec = error_mark_node; | |
1879 | ret.kind = ctsk_tagref; | |
67c2939d | 1880 | return ret; |
27bf414c JM |
1881 | } |
1882 | ret = parser_xref_tag (code, ident); | |
1883 | return ret; | |
1884 | } | |
1885 | ||
1886 | /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without* | |
1887 | the trailing semicolon. | |
1888 | ||
1889 | struct-declaration: | |
1890 | specifier-qualifier-list struct-declarator-list | |
1891 | ||
1892 | specifier-qualifier-list: | |
1893 | type-specifier specifier-qualifier-list[opt] | |
1894 | type-qualifier specifier-qualifier-list[opt] | |
1895 | attributes specifier-qualifier-list[opt] | |
1896 | ||
1897 | struct-declarator-list: | |
1898 | struct-declarator | |
1899 | struct-declarator-list , attributes[opt] struct-declarator | |
1900 | ||
1901 | struct-declarator: | |
1902 | declarator attributes[opt] | |
1903 | declarator[opt] : constant-expression attributes[opt] | |
1904 | ||
1905 | GNU extensions: | |
1906 | ||
1907 | struct-declaration: | |
1908 | __extension__ struct-declaration | |
1909 | specifier-qualifier-list | |
1910 | ||
1911 | Unlike the ISO C syntax, semicolons are handled elsewhere. The use | |
1912 | of attributes where shown is a GNU extension. In GNU C, we accept | |
1913 | any expression without commas in the syntax (assignment | |
1914 | expressions, not just conditional expressions); assignment | |
1915 | expressions will be diagnosed as non-constant. */ | |
1916 | ||
1917 | static tree | |
1918 | c_parser_struct_declaration (c_parser *parser) | |
1919 | { | |
1920 | struct c_declspecs *specs; | |
1921 | tree prefix_attrs; | |
1922 | tree all_prefix_attrs; | |
1923 | tree decls; | |
c7412148 | 1924 | location_t decl_loc; |
27bf414c JM |
1925 | if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) |
1926 | { | |
1927 | int ext; | |
1928 | tree decl; | |
1929 | ext = disable_extension_diagnostics (); | |
1930 | c_parser_consume_token (parser); | |
1931 | decl = c_parser_struct_declaration (parser); | |
1932 | restore_extension_diagnostics (ext); | |
1933 | return decl; | |
1934 | } | |
1935 | specs = build_null_declspecs (); | |
c7412148 | 1936 | decl_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1937 | c_parser_declspecs (parser, specs, false, true, true); |
1938 | if (parser->error) | |
67c2939d | 1939 | return NULL_TREE; |
27bf414c JM |
1940 | if (!specs->declspecs_seen_p) |
1941 | { | |
1942 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
1943 | return NULL_TREE; | |
1944 | } | |
1945 | finish_declspecs (specs); | |
1946 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1947 | { | |
1948 | tree ret; | |
1949 | if (!specs->type_seen_p) | |
1950 | { | |
509c9d60 MLI |
1951 | pedwarn (decl_loc, OPT_pedantic, |
1952 | "ISO C forbids member declarations with no members"); | |
27bf414c JM |
1953 | shadow_tag_warned (specs, pedantic); |
1954 | ret = NULL_TREE; | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | /* Support for unnamed structs or unions as members of | |
1959 | structs or unions (which is [a] useful and [b] supports | |
1960 | MS P-SDK). */ | |
b9baeecd | 1961 | tree attrs = NULL; |
3d10ed6c AH |
1962 | |
1963 | ret = grokfield (c_parser_peek_token (parser)->location, | |
1964 | build_id_declarator (NULL_TREE), specs, | |
b9baeecd | 1965 | NULL_TREE, &attrs); |
0ad7e054 RS |
1966 | if (ret) |
1967 | decl_attributes (&ret, attrs, 0); | |
27bf414c JM |
1968 | } |
1969 | return ret; | |
1970 | } | |
1971 | pending_xref_error (); | |
1972 | prefix_attrs = specs->attrs; | |
1973 | all_prefix_attrs = prefix_attrs; | |
1974 | specs->attrs = NULL_TREE; | |
1975 | decls = NULL_TREE; | |
1976 | while (true) | |
1977 | { | |
1978 | /* Declaring one or more declarators or un-named bit-fields. */ | |
1979 | struct c_declarator *declarator; | |
1980 | bool dummy = false; | |
1981 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
1982 | declarator = build_id_declarator (NULL_TREE); | |
1983 | else | |
1984 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
1985 | C_DTR_NORMAL, &dummy); | |
1986 | if (declarator == NULL) | |
1987 | { | |
1988 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1989 | break; | |
1990 | } | |
1991 | if (c_parser_next_token_is (parser, CPP_COLON) | |
1992 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1993 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1994 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE) | |
1995 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1996 | { | |
1997 | tree postfix_attrs = NULL_TREE; | |
1998 | tree width = NULL_TREE; | |
1999 | tree d; | |
2000 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2001 | { | |
2002 | c_parser_consume_token (parser); | |
2003 | width = c_parser_expr_no_commas (parser, NULL).value; | |
2004 | } | |
2005 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2006 | postfix_attrs = c_parser_attributes (parser); | |
3d10ed6c AH |
2007 | d = grokfield (c_parser_peek_token (parser)->location, |
2008 | declarator, specs, width, &all_prefix_attrs); | |
27bf414c JM |
2009 | decl_attributes (&d, chainon (postfix_attrs, |
2010 | all_prefix_attrs), 0); | |
2011 | TREE_CHAIN (d) = decls; | |
2012 | decls = d; | |
2013 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2014 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
2015 | prefix_attrs); | |
2016 | else | |
2017 | all_prefix_attrs = prefix_attrs; | |
2018 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2019 | c_parser_consume_token (parser); | |
2020 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2021 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2022 | { | |
2023 | /* Semicolon consumed in caller. */ | |
2024 | break; | |
2025 | } | |
2026 | else | |
2027 | { | |
2028 | c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>"); | |
2029 | break; | |
2030 | } | |
2031 | } | |
2032 | else | |
2033 | { | |
2034 | c_parser_error (parser, | |
2035 | "expected %<:%>, %<,%>, %<;%>, %<}%> or " | |
2036 | "%<__attribute__%>"); | |
2037 | break; | |
2038 | } | |
2039 | } | |
2040 | return decls; | |
2041 | } | |
2042 | ||
2043 | /* Parse a typeof specifier (a GNU extension). | |
2044 | ||
2045 | typeof-specifier: | |
2046 | typeof ( expression ) | |
2047 | typeof ( type-name ) | |
2048 | */ | |
2049 | ||
2050 | static struct c_typespec | |
2051 | c_parser_typeof_specifier (c_parser *parser) | |
2052 | { | |
2053 | struct c_typespec ret; | |
2054 | ret.kind = ctsk_typeof; | |
2055 | ret.spec = error_mark_node; | |
2056 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF)); | |
2057 | c_parser_consume_token (parser); | |
2058 | skip_evaluation++; | |
2059 | in_typeof++; | |
2060 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2061 | { | |
2062 | skip_evaluation--; | |
2063 | in_typeof--; | |
2064 | return ret; | |
2065 | } | |
2066 | if (c_parser_next_token_starts_typename (parser)) | |
2067 | { | |
2068 | struct c_type_name *type = c_parser_type_name (parser); | |
2069 | skip_evaluation--; | |
2070 | in_typeof--; | |
2071 | if (type != NULL) | |
2072 | { | |
2073 | ret.spec = groktypename (type); | |
2074 | pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE)); | |
2075 | } | |
2076 | } | |
2077 | else | |
2078 | { | |
52ffd86e | 2079 | bool was_vm; |
c7412148 | 2080 | location_t here = c_parser_peek_token (parser)->location; |
27bf414c JM |
2081 | struct c_expr expr = c_parser_expression (parser); |
2082 | skip_evaluation--; | |
2083 | in_typeof--; | |
2084 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
2085 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 2086 | error_at (here, "%<typeof%> applied to a bit-field"); |
27bf414c | 2087 | ret.spec = TREE_TYPE (expr.value); |
52ffd86e MS |
2088 | was_vm = variably_modified_type_p (ret.spec, NULL_TREE); |
2089 | /* This should be returned with the type so that when the type | |
2090 | is evaluated, this can be evaluated. For now, we avoid | |
2091 | evaluation when the context might. */ | |
2092 | if (!skip_evaluation && was_vm) | |
4adb785d MS |
2093 | { |
2094 | tree e = expr.value; | |
2095 | ||
2096 | /* If the expression is not of a type to which we cannot assign a line | |
2097 | number, wrap the thing in a no-op NOP_EXPR. */ | |
2098 | if (DECL_P (e) || CONSTANT_CLASS_P (e)) | |
2099 | e = build1 (NOP_EXPR, void_type_node, e); | |
2100 | ||
c9f9eb5d | 2101 | protected_set_expr_location (e, here); |
4adb785d MS |
2102 | |
2103 | add_stmt (e); | |
2104 | } | |
52ffd86e | 2105 | pop_maybe_used (was_vm); |
27bf414c JM |
2106 | } |
2107 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2108 | return ret; | |
2109 | } | |
2110 | ||
2111 | /* Parse a declarator, possibly an abstract declarator (C90 6.5.4, | |
2112 | 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may | |
2113 | be redeclared; otherwise it may not. KIND indicates which kind of | |
2114 | declarator is wanted. Returns a valid declarator except in the | |
2115 | case of a syntax error in which case NULL is returned. *SEEN_ID is | |
2116 | set to true if an identifier being declared is seen; this is used | |
2117 | to diagnose bad forms of abstract array declarators and to | |
2118 | determine whether an identifier list is syntactically permitted. | |
2119 | ||
2120 | declarator: | |
2121 | pointer[opt] direct-declarator | |
2122 | ||
2123 | direct-declarator: | |
2124 | identifier | |
2125 | ( attributes[opt] declarator ) | |
2126 | direct-declarator array-declarator | |
2127 | direct-declarator ( parameter-type-list ) | |
2128 | direct-declarator ( identifier-list[opt] ) | |
2129 | ||
2130 | pointer: | |
2131 | * type-qualifier-list[opt] | |
2132 | * type-qualifier-list[opt] pointer | |
2133 | ||
2134 | type-qualifier-list: | |
2135 | type-qualifier | |
2136 | attributes | |
2137 | type-qualifier-list type-qualifier | |
2138 | type-qualifier-list attributes | |
2139 | ||
2140 | parameter-type-list: | |
2141 | parameter-list | |
2142 | parameter-list , ... | |
2143 | ||
2144 | parameter-list: | |
2145 | parameter-declaration | |
2146 | parameter-list , parameter-declaration | |
2147 | ||
2148 | parameter-declaration: | |
2149 | declaration-specifiers declarator attributes[opt] | |
2150 | declaration-specifiers abstract-declarator[opt] attributes[opt] | |
2151 | ||
2152 | identifier-list: | |
2153 | identifier | |
2154 | identifier-list , identifier | |
2155 | ||
2156 | abstract-declarator: | |
2157 | pointer | |
2158 | pointer[opt] direct-abstract-declarator | |
2159 | ||
2160 | direct-abstract-declarator: | |
2161 | ( attributes[opt] abstract-declarator ) | |
2162 | direct-abstract-declarator[opt] array-declarator | |
2163 | direct-abstract-declarator[opt] ( parameter-type-list[opt] ) | |
2164 | ||
2165 | GNU extensions: | |
2166 | ||
2167 | direct-declarator: | |
2168 | direct-declarator ( parameter-forward-declarations | |
2169 | parameter-type-list[opt] ) | |
2170 | ||
2171 | direct-abstract-declarator: | |
c22cacf3 | 2172 | direct-abstract-declarator[opt] ( parameter-forward-declarations |
27bf414c JM |
2173 | parameter-type-list[opt] ) |
2174 | ||
2175 | parameter-forward-declarations: | |
2176 | parameter-list ; | |
2177 | parameter-forward-declarations parameter-list ; | |
2178 | ||
2179 | The uses of attributes shown above are GNU extensions. | |
2180 | ||
2181 | Some forms of array declarator are not included in C99 in the | |
2182 | syntax for abstract declarators; these are disallowed elsewhere. | |
2183 | This may be a defect (DR#289). | |
2184 | ||
2185 | This function also accepts an omitted abstract declarator as being | |
2186 | an abstract declarator, although not part of the formal syntax. */ | |
2187 | ||
2188 | static struct c_declarator * | |
2189 | c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2190 | bool *seen_id) | |
2191 | { | |
2192 | /* Parse any initial pointer part. */ | |
2193 | if (c_parser_next_token_is (parser, CPP_MULT)) | |
2194 | { | |
2195 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2196 | struct c_declarator *inner; | |
2197 | c_parser_consume_token (parser); | |
2198 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2199 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2200 | if (inner == NULL) | |
2201 | return NULL; | |
2202 | else | |
2203 | return make_pointer_declarator (quals_attrs, inner); | |
2204 | } | |
2205 | /* Now we have a direct declarator, direct abstract declarator or | |
2206 | nothing (which counts as a direct abstract declarator here). */ | |
2207 | return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id); | |
2208 | } | |
2209 | ||
2210 | /* Parse a direct declarator or direct abstract declarator; arguments | |
2211 | as c_parser_declarator. */ | |
2212 | ||
2213 | static struct c_declarator * | |
2214 | c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2215 | bool *seen_id) | |
2216 | { | |
2217 | /* The direct declarator must start with an identifier (possibly | |
2218 | omitted) or a parenthesized declarator (possibly abstract). In | |
2219 | an ordinary declarator, initial parentheses must start a | |
2220 | parenthesized declarator. In an abstract declarator or parameter | |
2221 | declarator, they could start a parenthesized declarator or a | |
2222 | parameter list. To tell which, the open parenthesis and any | |
2223 | following attributes must be read. If a declaration specifier | |
2224 | follows, then it is a parameter list; if the specifier is a | |
2225 | typedef name, there might be an ambiguity about redeclaring it, | |
2226 | which is resolved in the direction of treating it as a typedef | |
2227 | name. If a close parenthesis follows, it is also an empty | |
2228 | parameter list, as the syntax does not permit empty abstract | |
0fa2e4df | 2229 | declarators. Otherwise, it is a parenthesized declarator (in |
27bf414c JM |
2230 | which case the analysis may be repeated inside it, recursively). |
2231 | ||
2232 | ??? There is an ambiguity in a parameter declaration "int | |
2233 | (__attribute__((foo)) x)", where x is not a typedef name: it | |
2234 | could be an abstract declarator for a function, or declare x with | |
2235 | parentheses. The proper resolution of this ambiguity needs | |
2236 | documenting. At present we follow an accident of the old | |
2237 | parser's implementation, whereby the first parameter must have | |
2238 | some declaration specifiers other than just attributes. Thus as | |
0fa2e4df | 2239 | a parameter declaration it is treated as a parenthesized |
27bf414c JM |
2240 | parameter named x, and as an abstract declarator it is |
2241 | rejected. | |
2242 | ||
2243 | ??? Also following the old parser, attributes inside an empty | |
2244 | parameter list are ignored, making it a list not yielding a | |
2245 | prototype, rather than giving an error or making it have one | |
2246 | parameter with implicit type int. | |
2247 | ||
2248 | ??? Also following the old parser, typedef names may be | |
2249 | redeclared in declarators, but not Objective-C class names. */ | |
2250 | ||
2251 | if (kind != C_DTR_ABSTRACT | |
2252 | && c_parser_next_token_is (parser, CPP_NAME) | |
2253 | && ((type_seen_p | |
2254 | && c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME) | |
2255 | || c_parser_peek_token (parser)->id_kind == C_ID_ID)) | |
2256 | { | |
2257 | struct c_declarator *inner | |
2258 | = build_id_declarator (c_parser_peek_token (parser)->value); | |
2259 | *seen_id = true; | |
6037d88d | 2260 | inner->id_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2261 | c_parser_consume_token (parser); |
2262 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2263 | } | |
2264 | ||
2265 | if (kind != C_DTR_NORMAL | |
2266 | && c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2267 | { | |
2268 | struct c_declarator *inner = build_id_declarator (NULL_TREE); | |
2269 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2270 | } | |
2271 | ||
2272 | /* Either we are at the end of an abstract declarator, or we have | |
2273 | parentheses. */ | |
2274 | ||
2275 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2276 | { | |
2277 | tree attrs; | |
2278 | struct c_declarator *inner; | |
2279 | c_parser_consume_token (parser); | |
2280 | attrs = c_parser_attributes (parser); | |
2281 | if (kind != C_DTR_NORMAL | |
2282 | && (c_parser_next_token_starts_declspecs (parser) | |
2283 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))) | |
2284 | { | |
2285 | struct c_arg_info *args | |
2286 | = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL, | |
2287 | attrs); | |
2288 | if (args == NULL) | |
2289 | return NULL; | |
2290 | else | |
2291 | { | |
2292 | inner | |
2293 | = build_function_declarator (args, | |
2294 | build_id_declarator (NULL_TREE)); | |
2295 | return c_parser_direct_declarator_inner (parser, *seen_id, | |
2296 | inner); | |
2297 | } | |
2298 | } | |
2299 | /* A parenthesized declarator. */ | |
2300 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2301 | if (inner != NULL && attrs != NULL) | |
2302 | inner = build_attrs_declarator (attrs, inner); | |
2303 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2304 | { | |
2305 | c_parser_consume_token (parser); | |
2306 | if (inner == NULL) | |
2307 | return NULL; | |
2308 | else | |
2309 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2310 | } | |
2311 | else | |
2312 | { | |
2313 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2314 | "expected %<)%>"); | |
2315 | return NULL; | |
2316 | } | |
2317 | } | |
2318 | else | |
2319 | { | |
2320 | if (kind == C_DTR_NORMAL) | |
2321 | { | |
2322 | c_parser_error (parser, "expected identifier or %<(%>"); | |
2323 | return NULL; | |
2324 | } | |
2325 | else | |
2326 | return build_id_declarator (NULL_TREE); | |
2327 | } | |
2328 | } | |
2329 | ||
2330 | /* Parse part of a direct declarator or direct abstract declarator, | |
2331 | given that some (in INNER) has already been parsed; ID_PRESENT is | |
2332 | true if an identifier is present, false for an abstract | |
2333 | declarator. */ | |
2334 | ||
2335 | static struct c_declarator * | |
2336 | c_parser_direct_declarator_inner (c_parser *parser, bool id_present, | |
2337 | struct c_declarator *inner) | |
2338 | { | |
2339 | /* Parse a sequence of array declarators and parameter lists. */ | |
2340 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2341 | { | |
2342 | struct c_declarator *declarator; | |
2343 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2344 | bool static_seen; | |
2345 | bool star_seen; | |
2346 | tree dimen; | |
2347 | c_parser_consume_token (parser); | |
2348 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2349 | static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC); | |
2350 | if (static_seen) | |
2351 | c_parser_consume_token (parser); | |
2352 | if (static_seen && !quals_attrs->declspecs_seen_p) | |
2353 | c_parser_declspecs (parser, quals_attrs, false, false, true); | |
2354 | if (!quals_attrs->declspecs_seen_p) | |
2355 | quals_attrs = NULL; | |
2356 | /* If "static" is present, there must be an array dimension. | |
2357 | Otherwise, there may be a dimension, "*", or no | |
2358 | dimension. */ | |
2359 | if (static_seen) | |
2360 | { | |
2361 | star_seen = false; | |
2362 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2363 | } | |
2364 | else | |
2365 | { | |
2366 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2367 | { | |
2368 | dimen = NULL_TREE; | |
2369 | star_seen = false; | |
2370 | } | |
2371 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
2372 | { | |
2373 | if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE) | |
2374 | { | |
2375 | dimen = NULL_TREE; | |
2376 | star_seen = true; | |
2377 | c_parser_consume_token (parser); | |
2378 | } | |
2379 | else | |
2380 | { | |
2381 | star_seen = false; | |
2382 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2383 | } | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | star_seen = false; | |
2388 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
2389 | } | |
2390 | } | |
2391 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
2392 | c_parser_consume_token (parser); | |
2393 | else | |
2394 | { | |
2395 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
2396 | "expected %<]%>"); | |
2397 | return NULL; | |
2398 | } | |
2399 | declarator = build_array_declarator (dimen, quals_attrs, static_seen, | |
2400 | star_seen); | |
52ffd86e MS |
2401 | if (declarator == NULL) |
2402 | return NULL; | |
6ac0194d | 2403 | inner = set_array_declarator_inner (declarator, inner); |
27bf414c JM |
2404 | return c_parser_direct_declarator_inner (parser, id_present, inner); |
2405 | } | |
2406 | else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2407 | { | |
2408 | tree attrs; | |
2409 | struct c_arg_info *args; | |
2410 | c_parser_consume_token (parser); | |
2411 | attrs = c_parser_attributes (parser); | |
2412 | args = c_parser_parms_declarator (parser, id_present, attrs); | |
2413 | if (args == NULL) | |
2414 | return NULL; | |
2415 | else | |
2416 | { | |
2417 | inner = build_function_declarator (args, inner); | |
2418 | return c_parser_direct_declarator_inner (parser, id_present, inner); | |
2419 | } | |
2420 | } | |
2421 | return inner; | |
2422 | } | |
2423 | ||
2424 | /* Parse a parameter list or identifier list, including the closing | |
2425 | parenthesis but not the opening one. ATTRS are the attributes at | |
2426 | the start of the list. ID_LIST_OK is true if an identifier list is | |
2427 | acceptable; such a list must not have attributes at the start. */ | |
2428 | ||
2429 | static struct c_arg_info * | |
2430 | c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs) | |
2431 | { | |
2432 | push_scope (); | |
2433 | declare_parm_level (); | |
2434 | /* If the list starts with an identifier, it is an identifier list. | |
2435 | Otherwise, it is either a prototype list or an empty list. */ | |
2436 | if (id_list_ok | |
2437 | && !attrs | |
2438 | && c_parser_next_token_is (parser, CPP_NAME) | |
2439 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2440 | { | |
7fa3585c | 2441 | tree list = NULL_TREE, *nextp = &list; |
27bf414c JM |
2442 | while (c_parser_next_token_is (parser, CPP_NAME) |
2443 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
2444 | { | |
7fa3585c GK |
2445 | *nextp = build_tree_list (NULL_TREE, |
2446 | c_parser_peek_token (parser)->value); | |
2447 | nextp = & TREE_CHAIN (*nextp); | |
27bf414c JM |
2448 | c_parser_consume_token (parser); |
2449 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
2450 | break; | |
2451 | c_parser_consume_token (parser); | |
2452 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2453 | { | |
2454 | c_parser_error (parser, "expected identifier"); | |
2455 | break; | |
2456 | } | |
2457 | } | |
2458 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2459 | { | |
2460 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2461 | ret->parms = 0; | |
2462 | ret->tags = 0; | |
2463 | ret->types = list; | |
2464 | ret->others = 0; | |
3542a5c0 | 2465 | ret->pending_sizes = 0; |
6a1f8611 | 2466 | ret->had_vla_unspec = 0; |
27bf414c JM |
2467 | c_parser_consume_token (parser); |
2468 | pop_scope (); | |
2469 | return ret; | |
2470 | } | |
2471 | else | |
2472 | { | |
2473 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2474 | "expected %<)%>"); | |
2475 | pop_scope (); | |
2476 | return NULL; | |
2477 | } | |
2478 | } | |
2479 | else | |
2480 | { | |
2481 | struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs); | |
2482 | pop_scope (); | |
2483 | return ret; | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | /* Parse a parameter list (possibly empty), including the closing | |
2488 | parenthesis but not the opening one. ATTRS are the attributes at | |
2489 | the start of the list. */ | |
2490 | ||
2491 | static struct c_arg_info * | |
2492 | c_parser_parms_list_declarator (c_parser *parser, tree attrs) | |
2493 | { | |
2494 | bool good_parm = false; | |
2495 | /* ??? Following the old parser, forward parameter declarations may | |
2496 | use abstract declarators, and if no real parameter declarations | |
2497 | follow the forward declarations then this is not diagnosed. Also | |
2498 | note as above that attributes are ignored as the only contents of | |
2499 | the parentheses, or as the only contents after forward | |
2500 | declarations. */ | |
2501 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2502 | { | |
2503 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2504 | ret->parms = 0; | |
2505 | ret->tags = 0; | |
2506 | ret->types = 0; | |
2507 | ret->others = 0; | |
3542a5c0 | 2508 | ret->pending_sizes = 0; |
6a1f8611 | 2509 | ret->had_vla_unspec = 0; |
27bf414c JM |
2510 | c_parser_consume_token (parser); |
2511 | return ret; | |
2512 | } | |
2513 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2514 | { | |
2515 | struct c_arg_info *ret = XOBNEW (&parser_obstack, struct c_arg_info); | |
2516 | ret->parms = 0; | |
2517 | ret->tags = 0; | |
2518 | ret->others = 0; | |
3542a5c0 | 2519 | ret->pending_sizes = 0; |
6a1f8611 | 2520 | ret->had_vla_unspec = 0; |
27bf414c JM |
2521 | /* Suppress -Wold-style-definition for this case. */ |
2522 | ret->types = error_mark_node; | |
3ba09659 AH |
2523 | error_at (c_parser_peek_token (parser)->location, |
2524 | "ISO C requires a named argument before %<...%>"); | |
27bf414c JM |
2525 | c_parser_consume_token (parser); |
2526 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2527 | { | |
2528 | c_parser_consume_token (parser); | |
2529 | return ret; | |
2530 | } | |
2531 | else | |
2532 | { | |
2533 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2534 | "expected %<)%>"); | |
2535 | return NULL; | |
2536 | } | |
2537 | } | |
2538 | /* Nonempty list of parameters, either terminated with semicolon | |
2539 | (forward declarations; recurse) or with close parenthesis (normal | |
2540 | function) or with ", ... )" (variadic function). */ | |
2541 | while (true) | |
2542 | { | |
2543 | /* Parse a parameter. */ | |
2544 | struct c_parm *parm = c_parser_parameter_declaration (parser, attrs); | |
2545 | attrs = NULL_TREE; | |
2546 | if (parm != NULL) | |
2547 | { | |
2548 | good_parm = true; | |
2549 | push_parm_decl (parm); | |
2550 | } | |
2551 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2552 | { | |
2553 | tree new_attrs; | |
2554 | c_parser_consume_token (parser); | |
91d975b8 | 2555 | mark_forward_parm_decls (); |
27bf414c JM |
2556 | new_attrs = c_parser_attributes (parser); |
2557 | return c_parser_parms_list_declarator (parser, new_attrs); | |
2558 | } | |
2559 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2560 | { | |
2561 | c_parser_consume_token (parser); | |
2562 | if (good_parm) | |
2563 | return get_parm_info (false); | |
2564 | else | |
2565 | { | |
2566 | struct c_arg_info *ret | |
2567 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2568 | ret->parms = 0; | |
2569 | ret->tags = 0; | |
2570 | ret->types = 0; | |
2571 | ret->others = 0; | |
3542a5c0 | 2572 | ret->pending_sizes = 0; |
6a1f8611 | 2573 | ret->had_vla_unspec = 0; |
27bf414c JM |
2574 | return ret; |
2575 | } | |
2576 | } | |
2577 | if (!c_parser_require (parser, CPP_COMMA, | |
2578 | "expected %<;%>, %<,%> or %<)%>")) | |
2579 | { | |
2580 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2581 | return NULL; | |
2582 | } | |
2583 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
2584 | { | |
2585 | c_parser_consume_token (parser); | |
2586 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2587 | { | |
2588 | c_parser_consume_token (parser); | |
2589 | if (good_parm) | |
2590 | return get_parm_info (true); | |
2591 | else | |
2592 | { | |
2593 | struct c_arg_info *ret | |
2594 | = XOBNEW (&parser_obstack, struct c_arg_info); | |
2595 | ret->parms = 0; | |
2596 | ret->tags = 0; | |
2597 | ret->types = 0; | |
2598 | ret->others = 0; | |
3542a5c0 | 2599 | ret->pending_sizes = 0; |
6a1f8611 | 2600 | ret->had_vla_unspec = 0; |
27bf414c JM |
2601 | return ret; |
2602 | } | |
2603 | } | |
2604 | else | |
2605 | { | |
2606 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2607 | "expected %<)%>"); | |
2608 | return NULL; | |
2609 | } | |
2610 | } | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | /* Parse a parameter declaration. ATTRS are the attributes at the | |
2615 | start of the declaration if it is the first parameter. */ | |
2616 | ||
2617 | static struct c_parm * | |
2618 | c_parser_parameter_declaration (c_parser *parser, tree attrs) | |
2619 | { | |
2620 | struct c_declspecs *specs; | |
2621 | struct c_declarator *declarator; | |
2622 | tree prefix_attrs; | |
2623 | tree postfix_attrs = NULL_TREE; | |
2624 | bool dummy = false; | |
2625 | if (!c_parser_next_token_starts_declspecs (parser)) | |
2626 | { | |
2627 | /* ??? In some Objective-C cases '...' isn't applicable so there | |
2628 | should be a different message. */ | |
2629 | c_parser_error (parser, | |
2630 | "expected declaration specifiers or %<...%>"); | |
2631 | c_parser_skip_to_end_of_parameter (parser); | |
2632 | return NULL; | |
2633 | } | |
2634 | specs = build_null_declspecs (); | |
2635 | if (attrs) | |
2636 | { | |
2637 | declspecs_add_attrs (specs, attrs); | |
2638 | attrs = NULL_TREE; | |
2639 | } | |
2640 | c_parser_declspecs (parser, specs, true, true, true); | |
2641 | finish_declspecs (specs); | |
2642 | pending_xref_error (); | |
2643 | prefix_attrs = specs->attrs; | |
2644 | specs->attrs = NULL_TREE; | |
2645 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2646 | C_DTR_PARM, &dummy); | |
2647 | if (declarator == NULL) | |
2648 | { | |
2649 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
2650 | return NULL; | |
2651 | } | |
2652 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2653 | postfix_attrs = c_parser_attributes (parser); | |
2654 | return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs), | |
2655 | declarator); | |
2656 | } | |
2657 | ||
2658 | /* Parse a string literal in an asm expression. It should not be | |
2659 | translated, and wide string literals are an error although | |
2660 | permitted by the syntax. This is a GNU extension. | |
2661 | ||
2662 | asm-string-literal: | |
2663 | string-literal | |
2664 | ||
2665 | ??? At present, following the old parser, the caller needs to have | |
46c2514e TT |
2666 | set lex_untranslated_string to 1. It would be better to follow the |
2667 | C++ parser rather than using this kludge. */ | |
27bf414c JM |
2668 | |
2669 | static tree | |
2670 | c_parser_asm_string_literal (c_parser *parser) | |
2671 | { | |
2672 | tree str; | |
2673 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
2674 | { | |
2675 | str = c_parser_peek_token (parser)->value; | |
2676 | c_parser_consume_token (parser); | |
2677 | } | |
2678 | else if (c_parser_next_token_is (parser, CPP_WSTRING)) | |
2679 | { | |
3ba09659 AH |
2680 | error_at (c_parser_peek_token (parser)->location, |
2681 | "wide string literal in %<asm%>"); | |
27bf414c JM |
2682 | str = build_string (1, ""); |
2683 | c_parser_consume_token (parser); | |
2684 | } | |
2685 | else | |
2686 | { | |
2687 | c_parser_error (parser, "expected string literal"); | |
2688 | str = NULL_TREE; | |
2689 | } | |
2690 | return str; | |
2691 | } | |
2692 | ||
2693 | /* Parse a simple asm expression. This is used in restricted | |
2694 | contexts, where a full expression with inputs and outputs does not | |
2695 | make sense. This is a GNU extension. | |
2696 | ||
2697 | simple-asm-expr: | |
2698 | asm ( asm-string-literal ) | |
2699 | */ | |
2700 | ||
2701 | static tree | |
2702 | c_parser_simple_asm_expr (c_parser *parser) | |
2703 | { | |
2704 | tree str; | |
2705 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
2706 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2707 | lex_untranslated_string kludge. */ |
2708 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2709 | c_parser_consume_token (parser); |
2710 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2711 | { | |
46c2514e | 2712 | parser->lex_untranslated_string = false; |
27bf414c JM |
2713 | return NULL_TREE; |
2714 | } | |
2715 | str = c_parser_asm_string_literal (parser); | |
46c2514e | 2716 | parser->lex_untranslated_string = false; |
27bf414c JM |
2717 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
2718 | { | |
2719 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2720 | return NULL_TREE; | |
2721 | } | |
2722 | return str; | |
2723 | } | |
2724 | ||
2725 | /* Parse (possibly empty) attributes. This is a GNU extension. | |
2726 | ||
2727 | attributes: | |
2728 | empty | |
2729 | attributes attribute | |
2730 | ||
2731 | attribute: | |
2732 | __attribute__ ( ( attribute-list ) ) | |
2733 | ||
2734 | attribute-list: | |
2735 | attrib | |
2736 | attribute_list , attrib | |
2737 | ||
2738 | attrib: | |
2739 | empty | |
2740 | any-word | |
2741 | any-word ( identifier ) | |
2742 | any-word ( identifier , nonempty-expr-list ) | |
2743 | any-word ( expr-list ) | |
2744 | ||
2745 | where the "identifier" must not be declared as a type, and | |
2746 | "any-word" may be any identifier (including one declared as a | |
2747 | type), a reserved word storage class specifier, type specifier or | |
2748 | type qualifier. ??? This still leaves out most reserved keywords | |
2749 | (following the old parser), shouldn't we include them, and why not | |
2750 | allow identifiers declared as types to start the arguments? */ | |
2751 | ||
2752 | static tree | |
2753 | c_parser_attributes (c_parser *parser) | |
2754 | { | |
2755 | tree attrs = NULL_TREE; | |
2756 | while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2757 | { | |
2758 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
2759 | lex_untranslated_string kludge. */ |
2760 | parser->lex_untranslated_string = true; | |
27bf414c JM |
2761 | c_parser_consume_token (parser); |
2762 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2763 | { | |
46c2514e | 2764 | parser->lex_untranslated_string = false; |
27bf414c JM |
2765 | return attrs; |
2766 | } | |
2767 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2768 | { | |
46c2514e | 2769 | parser->lex_untranslated_string = false; |
27bf414c JM |
2770 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
2771 | return attrs; | |
2772 | } | |
2773 | /* Parse the attribute list. */ | |
2774 | while (c_parser_next_token_is (parser, CPP_COMMA) | |
2775 | || c_parser_next_token_is (parser, CPP_NAME) | |
2776 | || c_parser_next_token_is (parser, CPP_KEYWORD)) | |
2777 | { | |
2778 | tree attr, attr_name, attr_args; | |
2779 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2780 | { | |
2781 | c_parser_consume_token (parser); | |
2782 | continue; | |
2783 | } | |
2784 | if (c_parser_next_token_is (parser, CPP_KEYWORD)) | |
2785 | { | |
2786 | /* ??? See comment above about what keywords are | |
2787 | accepted here. */ | |
2788 | bool ok; | |
2789 | switch (c_parser_peek_token (parser)->keyword) | |
2790 | { | |
2791 | case RID_STATIC: | |
2792 | case RID_UNSIGNED: | |
2793 | case RID_LONG: | |
2794 | case RID_CONST: | |
2795 | case RID_EXTERN: | |
2796 | case RID_REGISTER: | |
2797 | case RID_TYPEDEF: | |
2798 | case RID_SHORT: | |
2799 | case RID_INLINE: | |
2800 | case RID_VOLATILE: | |
2801 | case RID_SIGNED: | |
2802 | case RID_AUTO: | |
2803 | case RID_RESTRICT: | |
2804 | case RID_COMPLEX: | |
2805 | case RID_THREAD: | |
2806 | case RID_INT: | |
2807 | case RID_CHAR: | |
2808 | case RID_FLOAT: | |
2809 | case RID_DOUBLE: | |
2810 | case RID_VOID: | |
9a8ce21f JG |
2811 | case RID_DFLOAT32: |
2812 | case RID_DFLOAT64: | |
2813 | case RID_DFLOAT128: | |
27bf414c | 2814 | case RID_BOOL: |
ab22c1fa CF |
2815 | case RID_FRACT: |
2816 | case RID_ACCUM: | |
2817 | case RID_SAT: | |
27bf414c JM |
2818 | ok = true; |
2819 | break; | |
2820 | default: | |
2821 | ok = false; | |
2822 | break; | |
2823 | } | |
2824 | if (!ok) | |
2825 | break; | |
5dc4a7f4 JJ |
2826 | /* Accept __attribute__((__const)) as __attribute__((const)) |
2827 | etc. */ | |
2828 | attr_name | |
2829 | = ridpointers[(int) c_parser_peek_token (parser)->keyword]; | |
27bf414c | 2830 | } |
5dc4a7f4 JJ |
2831 | else |
2832 | attr_name = c_parser_peek_token (parser)->value; | |
27bf414c JM |
2833 | c_parser_consume_token (parser); |
2834 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) | |
2835 | { | |
2836 | attr = build_tree_list (attr_name, NULL_TREE); | |
2837 | attrs = chainon (attrs, attr); | |
2838 | continue; | |
2839 | } | |
2840 | c_parser_consume_token (parser); | |
2841 | /* Parse the attribute contents. If they start with an | |
2842 | identifier which is followed by a comma or close | |
2843 | parenthesis, then the arguments start with that | |
2844 | identifier; otherwise they are an expression list. */ | |
2845 | if (c_parser_next_token_is (parser, CPP_NAME) | |
2846 | && c_parser_peek_token (parser)->id_kind == C_ID_ID | |
2847 | && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA) | |
2848 | || (c_parser_peek_2nd_token (parser)->type | |
2849 | == CPP_CLOSE_PAREN))) | |
2850 | { | |
2851 | tree arg1 = c_parser_peek_token (parser)->value; | |
2852 | c_parser_consume_token (parser); | |
2853 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2854 | attr_args = build_tree_list (NULL_TREE, arg1); | |
2855 | else | |
2856 | { | |
2857 | c_parser_consume_token (parser); | |
2858 | attr_args = tree_cons (NULL_TREE, arg1, | |
46bdb9cf | 2859 | c_parser_expr_list (parser, false)); |
27bf414c JM |
2860 | } |
2861 | } | |
2862 | else | |
2863 | { | |
2864 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2865 | attr_args = NULL_TREE; | |
2866 | else | |
46bdb9cf | 2867 | attr_args = c_parser_expr_list (parser, false); |
27bf414c JM |
2868 | } |
2869 | attr = build_tree_list (attr_name, attr_args); | |
2870 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2871 | c_parser_consume_token (parser); | |
2872 | else | |
2873 | { | |
46c2514e | 2874 | parser->lex_untranslated_string = false; |
27bf414c JM |
2875 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2876 | "expected %<)%>"); | |
2877 | return attrs; | |
2878 | } | |
2879 | attrs = chainon (attrs, attr); | |
2880 | } | |
2881 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2882 | c_parser_consume_token (parser); | |
2883 | else | |
2884 | { | |
46c2514e | 2885 | parser->lex_untranslated_string = false; |
27bf414c JM |
2886 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2887 | "expected %<)%>"); | |
2888 | return attrs; | |
2889 | } | |
2890 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2891 | c_parser_consume_token (parser); | |
2892 | else | |
2893 | { | |
46c2514e | 2894 | parser->lex_untranslated_string = false; |
27bf414c JM |
2895 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
2896 | "expected %<)%>"); | |
2897 | return attrs; | |
2898 | } | |
46c2514e | 2899 | parser->lex_untranslated_string = false; |
27bf414c JM |
2900 | } |
2901 | return attrs; | |
2902 | } | |
2903 | ||
2904 | /* Parse a type name (C90 6.5.5, C99 6.7.6). | |
2905 | ||
2906 | type-name: | |
2907 | specifier-qualifier-list abstract-declarator[opt] | |
2908 | */ | |
2909 | ||
2910 | static struct c_type_name * | |
2911 | c_parser_type_name (c_parser *parser) | |
2912 | { | |
2913 | struct c_declspecs *specs = build_null_declspecs (); | |
2914 | struct c_declarator *declarator; | |
2915 | struct c_type_name *ret; | |
2916 | bool dummy = false; | |
2917 | c_parser_declspecs (parser, specs, false, true, true); | |
2918 | if (!specs->declspecs_seen_p) | |
2919 | { | |
2920 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
2921 | return NULL; | |
2922 | } | |
2923 | pending_xref_error (); | |
2924 | finish_declspecs (specs); | |
2925 | declarator = c_parser_declarator (parser, specs->type_seen_p, | |
2926 | C_DTR_ABSTRACT, &dummy); | |
2927 | if (declarator == NULL) | |
2928 | return NULL; | |
2929 | ret = XOBNEW (&parser_obstack, struct c_type_name); | |
2930 | ret->specs = specs; | |
2931 | ret->declarator = declarator; | |
2932 | return ret; | |
2933 | } | |
2934 | ||
2935 | /* Parse an initializer (C90 6.5.7, C99 6.7.8). | |
2936 | ||
2937 | initializer: | |
2938 | assignment-expression | |
2939 | { initializer-list } | |
2940 | { initializer-list , } | |
2941 | ||
2942 | initializer-list: | |
2943 | designation[opt] initializer | |
2944 | initializer-list , designation[opt] initializer | |
2945 | ||
2946 | designation: | |
2947 | designator-list = | |
2948 | ||
2949 | designator-list: | |
2950 | designator | |
2951 | designator-list designator | |
2952 | ||
2953 | designator: | |
2954 | array-designator | |
2955 | . identifier | |
2956 | ||
2957 | array-designator: | |
2958 | [ constant-expression ] | |
2959 | ||
2960 | GNU extensions: | |
2961 | ||
2962 | initializer: | |
2963 | { } | |
2964 | ||
2965 | designation: | |
2966 | array-designator | |
2967 | identifier : | |
2968 | ||
2969 | array-designator: | |
2970 | [ constant-expression ... constant-expression ] | |
2971 | ||
2972 | Any expression without commas is accepted in the syntax for the | |
2973 | constant-expressions, with non-constant expressions rejected later. | |
2974 | ||
2975 | This function is only used for top-level initializers; for nested | |
2976 | ones, see c_parser_initval. */ | |
2977 | ||
2978 | static struct c_expr | |
2979 | c_parser_initializer (c_parser *parser) | |
2980 | { | |
2981 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
2982 | return c_parser_braced_init (parser, NULL_TREE, false); | |
2983 | else | |
46bdb9cf JM |
2984 | { |
2985 | struct c_expr ret; | |
2986 | ret = c_parser_expr_no_commas (parser, NULL); | |
2987 | if (TREE_CODE (ret.value) != STRING_CST | |
2988 | && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR) | |
f2a71bbc | 2989 | ret = default_function_array_conversion (ret); |
46bdb9cf JM |
2990 | return ret; |
2991 | } | |
27bf414c JM |
2992 | } |
2993 | ||
2994 | /* Parse a braced initializer list. TYPE is the type specified for a | |
2995 | compound literal, and NULL_TREE for other initializers and for | |
2996 | nested braced lists. NESTED_P is true for nested braced lists, | |
2997 | false for the list of a compound literal or the list that is the | |
2998 | top-level initializer in a declaration. */ | |
2999 | ||
3000 | static struct c_expr | |
3001 | c_parser_braced_init (c_parser *parser, tree type, bool nested_p) | |
3002 | { | |
c7412148 | 3003 | location_t brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3004 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); |
3005 | c_parser_consume_token (parser); | |
3006 | if (nested_p) | |
3007 | push_init_level (0); | |
3008 | else | |
3009 | really_start_incremental_init (type); | |
3010 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3011 | { | |
509c9d60 | 3012 | pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces"); |
27bf414c JM |
3013 | } |
3014 | else | |
3015 | { | |
3016 | /* Parse a non-empty initializer list, possibly with a trailing | |
3017 | comma. */ | |
3018 | while (true) | |
3019 | { | |
3020 | c_parser_initelt (parser); | |
3021 | if (parser->error) | |
3022 | break; | |
3023 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3024 | c_parser_consume_token (parser); | |
3025 | else | |
3026 | break; | |
3027 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3028 | break; | |
3029 | } | |
3030 | } | |
3031 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3032 | { | |
3033 | struct c_expr ret; | |
3034 | ret.value = error_mark_node; | |
3035 | ret.original_code = ERROR_MARK; | |
3036 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>"); | |
3037 | return ret; | |
3038 | } | |
3039 | c_parser_consume_token (parser); | |
3040 | return pop_init_level (0); | |
3041 | } | |
3042 | ||
3043 | /* Parse a nested initializer, including designators. */ | |
3044 | ||
3045 | static void | |
3046 | c_parser_initelt (c_parser *parser) | |
3047 | { | |
3048 | /* Parse any designator or designator list. A single array | |
3049 | designator may have the subsequent "=" omitted in GNU C, but a | |
3050 | longer list or a structure member designator may not. */ | |
3051 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3052 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
3053 | { | |
3054 | /* Old-style structure member designator. */ | |
3055 | set_init_label (c_parser_peek_token (parser)->value); | |
fcf73884 | 3056 | /* Use the colon as the error location. */ |
509c9d60 MLI |
3057 | pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic, |
3058 | "obsolete use of designated initializer with %<:%>"); | |
27bf414c JM |
3059 | c_parser_consume_token (parser); |
3060 | c_parser_consume_token (parser); | |
3061 | } | |
3062 | else | |
3063 | { | |
3064 | /* des_seen is 0 if there have been no designators, 1 if there | |
3065 | has been a single array designator and 2 otherwise. */ | |
3066 | int des_seen = 0; | |
c7412148 TT |
3067 | /* Location of a designator. */ |
3068 | location_t des_loc; | |
27bf414c JM |
3069 | while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE) |
3070 | || c_parser_next_token_is (parser, CPP_DOT)) | |
3071 | { | |
3072 | int des_prev = des_seen; | |
c7412148 TT |
3073 | if (!des_seen) |
3074 | des_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3075 | if (des_seen < 2) |
3076 | des_seen++; | |
3077 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
3078 | { | |
3079 | des_seen = 2; | |
3080 | c_parser_consume_token (parser); | |
3081 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3082 | { | |
3083 | set_init_label (c_parser_peek_token (parser)->value); | |
3084 | c_parser_consume_token (parser); | |
3085 | } | |
3086 | else | |
3087 | { | |
3088 | struct c_expr init; | |
3089 | init.value = error_mark_node; | |
3090 | init.original_code = ERROR_MARK; | |
3091 | c_parser_error (parser, "expected identifier"); | |
3092 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
3093 | process_init_element (init); | |
3094 | return; | |
3095 | } | |
3096 | } | |
3097 | else | |
3098 | { | |
3099 | tree first, second; | |
c7412148 | 3100 | location_t ellipsis_loc; |
27bf414c JM |
3101 | /* ??? Following the old parser, [ objc-receiver |
3102 | objc-message-args ] is accepted as an initializer, | |
3103 | being distinguished from a designator by what follows | |
3104 | the first assignment expression inside the square | |
3105 | brackets, but after a first array designator a | |
3106 | subsequent square bracket is for Objective-C taken to | |
3107 | start an expression, using the obsolete form of | |
3108 | designated initializer without '=', rather than | |
3109 | possibly being a second level of designation: in LALR | |
3110 | terms, the '[' is shifted rather than reducing | |
3111 | designator to designator-list. */ | |
3112 | if (des_prev == 1 && c_dialect_objc ()) | |
3113 | { | |
3114 | des_seen = des_prev; | |
3115 | break; | |
3116 | } | |
3117 | if (des_prev == 0 && c_dialect_objc ()) | |
3118 | { | |
3119 | /* This might be an array designator or an | |
3120 | Objective-C message expression. If the former, | |
3121 | continue parsing here; if the latter, parse the | |
3122 | remainder of the initializer given the starting | |
3123 | primary-expression. ??? It might make sense to | |
3124 | distinguish when des_prev == 1 as well; see | |
3125 | previous comment. */ | |
3126 | tree rec, args; | |
3127 | struct c_expr mexpr; | |
3128 | c_parser_consume_token (parser); | |
3129 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
3130 | && ((c_parser_peek_token (parser)->id_kind | |
3131 | == C_ID_TYPENAME) | |
3132 | || (c_parser_peek_token (parser)->id_kind | |
3133 | == C_ID_CLASSNAME))) | |
3134 | { | |
3135 | /* Type name receiver. */ | |
3136 | tree id = c_parser_peek_token (parser)->value; | |
3137 | c_parser_consume_token (parser); | |
3138 | rec = objc_get_class_reference (id); | |
3139 | goto parse_message_args; | |
3140 | } | |
3141 | first = c_parser_expr_no_commas (parser, NULL).value; | |
3142 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS) | |
3143 | || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3144 | goto array_desig_after_first; | |
3145 | /* Expression receiver. So far only one part | |
3146 | without commas has been parsed; there might be | |
3147 | more of the expression. */ | |
3148 | rec = first; | |
3149 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
3150 | { | |
f2a71bbc | 3151 | struct c_expr next; |
27bf414c | 3152 | c_parser_consume_token (parser); |
f2a71bbc | 3153 | next = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 3154 | next = default_function_array_conversion (next); |
f2a71bbc | 3155 | rec = build_compound_expr (rec, next.value); |
27bf414c JM |
3156 | } |
3157 | parse_message_args: | |
3158 | /* Now parse the objc-message-args. */ | |
3159 | args = c_parser_objc_message_args (parser); | |
3160 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3161 | "expected %<]%>"); | |
3162 | mexpr.value | |
3163 | = objc_build_message_expr (build_tree_list (rec, args)); | |
3164 | mexpr.original_code = ERROR_MARK; | |
3165 | /* Now parse and process the remainder of the | |
3166 | initializer, starting with this message | |
3167 | expression as a primary-expression. */ | |
3168 | c_parser_initval (parser, &mexpr); | |
3169 | return; | |
3170 | } | |
3171 | c_parser_consume_token (parser); | |
3172 | first = c_parser_expr_no_commas (parser, NULL).value; | |
3173 | array_desig_after_first: | |
3174 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3175 | { | |
c7412148 | 3176 | ellipsis_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3177 | c_parser_consume_token (parser); |
3178 | second = c_parser_expr_no_commas (parser, NULL).value; | |
3179 | } | |
3180 | else | |
3181 | second = NULL_TREE; | |
3182 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3183 | { | |
3184 | c_parser_consume_token (parser); | |
3185 | set_init_index (first, second); | |
fcf73884 | 3186 | if (second) |
509c9d60 MLI |
3187 | pedwarn (ellipsis_loc, OPT_pedantic, |
3188 | "ISO C forbids specifying range of elements to initialize"); | |
27bf414c JM |
3189 | } |
3190 | else | |
3191 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3192 | "expected %<]%>"); | |
3193 | } | |
3194 | } | |
3195 | if (des_seen >= 1) | |
3196 | { | |
3197 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
3198 | { | |
fcf73884 | 3199 | if (!flag_isoc99) |
509c9d60 MLI |
3200 | pedwarn (des_loc, OPT_pedantic, |
3201 | "ISO C90 forbids specifying subobject to initialize"); | |
27bf414c JM |
3202 | c_parser_consume_token (parser); |
3203 | } | |
3204 | else | |
3205 | { | |
3206 | if (des_seen == 1) | |
509c9d60 MLI |
3207 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
3208 | "obsolete use of designated initializer without %<=%>"); | |
27bf414c JM |
3209 | else |
3210 | { | |
3211 | struct c_expr init; | |
3212 | init.value = error_mark_node; | |
3213 | init.original_code = ERROR_MARK; | |
3214 | c_parser_error (parser, "expected %<=%>"); | |
3215 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
3216 | process_init_element (init); | |
3217 | return; | |
3218 | } | |
3219 | } | |
3220 | } | |
3221 | } | |
3222 | c_parser_initval (parser, NULL); | |
3223 | } | |
3224 | ||
3225 | /* Parse a nested initializer; as c_parser_initializer but parses | |
3226 | initializers within braced lists, after any designators have been | |
3227 | applied. If AFTER is not NULL then it is an Objective-C message | |
3228 | expression which is the primary-expression starting the | |
3229 | initializer. */ | |
3230 | ||
3231 | static void | |
3232 | c_parser_initval (c_parser *parser, struct c_expr *after) | |
3233 | { | |
3234 | struct c_expr init; | |
3235 | gcc_assert (!after || c_dialect_objc ()); | |
3236 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after) | |
3237 | init = c_parser_braced_init (parser, NULL_TREE, true); | |
3238 | else | |
46bdb9cf JM |
3239 | { |
3240 | init = c_parser_expr_no_commas (parser, after); | |
3241 | if (init.value != NULL_TREE | |
3242 | && TREE_CODE (init.value) != STRING_CST | |
3243 | && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR) | |
f2a71bbc | 3244 | init = default_function_array_conversion (init); |
46bdb9cf | 3245 | } |
27bf414c JM |
3246 | process_init_element (init); |
3247 | } | |
3248 | ||
3249 | /* Parse a compound statement (possibly a function body) (C90 6.6.2, | |
3250 | C99 6.8.2). | |
3251 | ||
3252 | compound-statement: | |
3253 | { block-item-list[opt] } | |
3254 | { label-declarations block-item-list } | |
3255 | ||
3256 | block-item-list: | |
3257 | block-item | |
3258 | block-item-list block-item | |
3259 | ||
3260 | block-item: | |
3261 | nested-declaration | |
3262 | statement | |
3263 | ||
3264 | nested-declaration: | |
3265 | declaration | |
3266 | ||
3267 | GNU extensions: | |
3268 | ||
3269 | compound-statement: | |
3270 | { label-declarations block-item-list } | |
3271 | ||
3272 | nested-declaration: | |
3273 | __extension__ nested-declaration | |
3274 | nested-function-definition | |
3275 | ||
3276 | label-declarations: | |
3277 | label-declaration | |
3278 | label-declarations label-declaration | |
3279 | ||
3280 | label-declaration: | |
3281 | __label__ identifier-list ; | |
3282 | ||
3283 | Allowing the mixing of declarations and code is new in C99. The | |
3284 | GNU syntax also permits (not shown above) labels at the end of | |
3285 | compound statements, which yield an error. We don't allow labels | |
3286 | on declarations; this might seem like a natural extension, but | |
3287 | there would be a conflict between attributes on the label and | |
3288 | prefix attributes on the declaration. ??? The syntax follows the | |
3289 | old parser in requiring something after label declarations. | |
3290 | Although they are erroneous if the labels declared aren't defined, | |
953ff289 DN |
3291 | is it useful for the syntax to be this way? |
3292 | ||
3293 | OpenMP: | |
3294 | ||
3295 | block-item: | |
3296 | openmp-directive | |
3297 | ||
3298 | openmp-directive: | |
3299 | barrier-directive | |
3300 | flush-directive */ | |
27bf414c JM |
3301 | |
3302 | static tree | |
3303 | c_parser_compound_statement (c_parser *parser) | |
3304 | { | |
3305 | tree stmt; | |
3306 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) | |
4e3d9146 | 3307 | return error_mark_node; |
27bf414c JM |
3308 | stmt = c_begin_compound_stmt (true); |
3309 | c_parser_compound_statement_nostart (parser); | |
3310 | return c_end_compound_stmt (stmt, true); | |
3311 | } | |
3312 | ||
3313 | /* Parse a compound statement except for the opening brace. This is | |
3314 | used for parsing both compound statements and statement expressions | |
3315 | (which follow different paths to handling the opening). */ | |
3316 | ||
3317 | static void | |
3318 | c_parser_compound_statement_nostart (c_parser *parser) | |
3319 | { | |
3320 | bool last_stmt = false; | |
3321 | bool last_label = false; | |
3ba09659 | 3322 | location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3323 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) |
3324 | { | |
3325 | c_parser_consume_token (parser); | |
3326 | return; | |
3327 | } | |
3328 | if (c_parser_next_token_is_keyword (parser, RID_LABEL)) | |
3329 | { | |
c7412148 | 3330 | location_t err_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3331 | /* Read zero or more forward-declarations for labels that nested |
3332 | functions can jump to. */ | |
3333 | while (c_parser_next_token_is_keyword (parser, RID_LABEL)) | |
3334 | { | |
3335 | c_parser_consume_token (parser); | |
3336 | /* Any identifiers, including those declared as type names, | |
3337 | are OK here. */ | |
3338 | while (true) | |
3339 | { | |
3340 | tree label; | |
3341 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
3342 | { | |
3343 | c_parser_error (parser, "expected identifier"); | |
3344 | break; | |
3345 | } | |
3346 | label | |
3347 | = declare_label (c_parser_peek_token (parser)->value); | |
3348 | C_DECLARED_LABEL_FLAG (label) = 1; | |
3349 | add_stmt (build_stmt (DECL_EXPR, label)); | |
3350 | c_parser_consume_token (parser); | |
3351 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3352 | c_parser_consume_token (parser); | |
3353 | else | |
3354 | break; | |
3355 | } | |
3356 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
3357 | } | |
509c9d60 | 3358 | pedwarn (err_loc, OPT_pedantic, "ISO C forbids label declarations"); |
27bf414c JM |
3359 | } |
3360 | /* We must now have at least one statement, label or declaration. */ | |
3361 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3362 | { | |
3363 | c_parser_error (parser, "expected declaration or statement"); | |
3364 | c_parser_consume_token (parser); | |
3365 | return; | |
3366 | } | |
3367 | while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3368 | { | |
3369 | location_t loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3370 | if (c_parser_next_token_is_keyword (parser, RID_CASE) |
3371 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3372 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3373 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3374 | { | |
c7412148 TT |
3375 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) |
3376 | label_loc = c_parser_peek_2nd_token (parser)->location; | |
3377 | else | |
3378 | label_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3379 | last_label = true; |
3380 | last_stmt = false; | |
3381 | c_parser_label (parser); | |
3382 | } | |
3383 | else if (!last_label | |
3384 | && c_parser_next_token_starts_declspecs (parser)) | |
3385 | { | |
3386 | last_label = false; | |
3387 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
fcf73884 | 3388 | if (last_stmt) |
509c9d60 MLI |
3389 | pedwarn_c90 (loc, |
3390 | (pedantic && !flag_isoc99) | |
fcf73884 MLI |
3391 | ? OPT_pedantic |
3392 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3393 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3394 | last_stmt = false; |
3395 | } | |
3396 | else if (!last_label | |
3397 | && c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
3398 | { | |
3399 | /* __extension__ can start a declaration, but is also an | |
3400 | unary operator that can start an expression. Consume all | |
3401 | but the last of a possible series of __extension__ to | |
3402 | determine which. */ | |
3403 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
3404 | && (c_parser_peek_2nd_token (parser)->keyword | |
3405 | == RID_EXTENSION)) | |
3406 | c_parser_consume_token (parser); | |
3407 | if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser))) | |
3408 | { | |
3409 | int ext; | |
3410 | ext = disable_extension_diagnostics (); | |
3411 | c_parser_consume_token (parser); | |
3412 | last_label = false; | |
3413 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
3414 | /* Following the old parser, __extension__ does not | |
3415 | disable this diagnostic. */ | |
3416 | restore_extension_diagnostics (ext); | |
fcf73884 | 3417 | if (last_stmt) |
509c9d60 | 3418 | pedwarn_c90 (loc, (pedantic && !flag_isoc99) |
fcf73884 MLI |
3419 | ? OPT_pedantic |
3420 | : OPT_Wdeclaration_after_statement, | |
509c9d60 | 3421 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
3422 | last_stmt = false; |
3423 | } | |
3424 | else | |
3425 | goto statement; | |
3426 | } | |
bc4071dd RH |
3427 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
3428 | { | |
3429 | /* External pragmas, and some omp pragmas, are not associated | |
3430 | with regular c code, and so are not to be considered statements | |
3431 | syntactically. This ensures that the user doesn't put them | |
3432 | places that would turn into syntax errors if the directive | |
3433 | were ignored. */ | |
3434 | if (c_parser_pragma (parser, pragma_compound)) | |
3435 | last_label = false, last_stmt = true; | |
3436 | } | |
3437 | else if (c_parser_next_token_is (parser, CPP_EOF)) | |
3438 | { | |
3439 | c_parser_error (parser, "expected declaration or statement"); | |
3440 | return; | |
3441 | } | |
b4b56033 MLI |
3442 | else if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3443 | { | |
3444 | if (parser->in_if_block) | |
3445 | { | |
3ba09659 | 3446 | error_at (loc, """expected %<}%> before %<else%>"); |
b4b56033 MLI |
3447 | return; |
3448 | } | |
3449 | else | |
3450 | { | |
3ba09659 | 3451 | error_at (loc, "%<else%> without a previous %<if%>"); |
b4b56033 MLI |
3452 | c_parser_consume_token (parser); |
3453 | continue; | |
3454 | } | |
3455 | } | |
27bf414c JM |
3456 | else |
3457 | { | |
3458 | statement: | |
3459 | last_label = false; | |
3460 | last_stmt = true; | |
3461 | c_parser_statement_after_labels (parser); | |
3462 | } | |
2c14ae9a VR |
3463 | |
3464 | parser->error = false; | |
27bf414c JM |
3465 | } |
3466 | if (last_label) | |
3ba09659 | 3467 | error_at (label_loc, "label at end of compound statement"); |
27bf414c JM |
3468 | c_parser_consume_token (parser); |
3469 | } | |
3470 | ||
3471 | /* Parse a label (C90 6.6.1, C99 6.8.1). | |
3472 | ||
3473 | label: | |
3474 | identifier : attributes[opt] | |
3475 | case constant-expression : | |
3476 | default : | |
3477 | ||
3478 | GNU extensions: | |
3479 | ||
3480 | label: | |
3481 | case constant-expression ... constant-expression : | |
3482 | ||
3483 | The use of attributes on labels is a GNU extension. The syntax in | |
3484 | GNU C accepts any expressions without commas, non-constant | |
3485 | expressions being rejected later. */ | |
3486 | ||
3487 | static void | |
3488 | c_parser_label (c_parser *parser) | |
3489 | { | |
3490 | location_t loc1 = c_parser_peek_token (parser)->location; | |
3491 | tree label = NULL_TREE; | |
3492 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) | |
3493 | { | |
3494 | tree exp1, exp2; | |
3495 | c_parser_consume_token (parser); | |
3496 | exp1 = c_parser_expr_no_commas (parser, NULL).value; | |
3497 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
3498 | { | |
3499 | c_parser_consume_token (parser); | |
3500 | label = do_case (exp1, NULL_TREE); | |
3501 | } | |
3502 | else if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3503 | { | |
3504 | c_parser_consume_token (parser); | |
3505 | exp2 = c_parser_expr_no_commas (parser, NULL).value; | |
3506 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
3507 | label = do_case (exp1, exp2); | |
3508 | } | |
3509 | else | |
3510 | c_parser_error (parser, "expected %<:%> or %<...%>"); | |
3511 | } | |
3512 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
3513 | { | |
3514 | c_parser_consume_token (parser); | |
3515 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
3516 | label = do_case (NULL_TREE, NULL_TREE); | |
3517 | } | |
3518 | else | |
3519 | { | |
3520 | tree name = c_parser_peek_token (parser)->value; | |
3521 | tree tlab; | |
27bf414c | 3522 | tree attrs; |
c7412148 | 3523 | location_t loc2 = c_parser_peek_token (parser)->location; |
27bf414c JM |
3524 | gcc_assert (c_parser_next_token_is (parser, CPP_NAME)); |
3525 | c_parser_consume_token (parser); | |
3526 | gcc_assert (c_parser_next_token_is (parser, CPP_COLON)); | |
27bf414c JM |
3527 | c_parser_consume_token (parser); |
3528 | attrs = c_parser_attributes (parser); | |
3529 | tlab = define_label (loc2, name); | |
3530 | if (tlab) | |
3531 | { | |
3532 | decl_attributes (&tlab, attrs, 0); | |
3533 | label = add_stmt (build_stmt (LABEL_EXPR, tlab)); | |
3534 | } | |
3535 | } | |
3536 | if (label) | |
3d57f0f0 MLI |
3537 | { |
3538 | SET_EXPR_LOCATION (label, loc1); | |
3539 | if (c_parser_next_token_starts_declspecs (parser) | |
3540 | && !(c_parser_next_token_is (parser, CPP_NAME) | |
3541 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3542 | { | |
3ba09659 AH |
3543 | error_at (c_parser_peek_token (parser)->location, |
3544 | "a label can only be part of a statement and " | |
3545 | "a declaration is not a statement"); | |
3d57f0f0 MLI |
3546 | c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false, |
3547 | /*nested*/ true, /*empty_ok*/ false, | |
3548 | /*start_attr_ok*/ true); | |
3549 | } | |
3550 | } | |
27bf414c JM |
3551 | } |
3552 | ||
3553 | /* Parse a statement (C90 6.6, C99 6.8). | |
3554 | ||
3555 | statement: | |
3556 | labeled-statement | |
3557 | compound-statement | |
3558 | expression-statement | |
3559 | selection-statement | |
3560 | iteration-statement | |
3561 | jump-statement | |
3562 | ||
3563 | labeled-statement: | |
3564 | label statement | |
3565 | ||
3566 | expression-statement: | |
3567 | expression[opt] ; | |
3568 | ||
3569 | selection-statement: | |
3570 | if-statement | |
3571 | switch-statement | |
3572 | ||
3573 | iteration-statement: | |
3574 | while-statement | |
3575 | do-statement | |
3576 | for-statement | |
3577 | ||
3578 | jump-statement: | |
3579 | goto identifier ; | |
3580 | continue ; | |
3581 | break ; | |
3582 | return expression[opt] ; | |
3583 | ||
3584 | GNU extensions: | |
3585 | ||
3586 | statement: | |
3587 | asm-statement | |
3588 | ||
3589 | jump-statement: | |
3590 | goto * expression ; | |
3591 | ||
3592 | Objective-C: | |
3593 | ||
3594 | statement: | |
3595 | objc-throw-statement | |
3596 | objc-try-catch-statement | |
3597 | objc-synchronized-statement | |
3598 | ||
3599 | objc-throw-statement: | |
3600 | @throw expression ; | |
3601 | @throw ; | |
953ff289 DN |
3602 | |
3603 | OpenMP: | |
3604 | ||
3605 | statement: | |
3606 | openmp-construct | |
3607 | ||
3608 | openmp-construct: | |
3609 | parallel-construct | |
3610 | for-construct | |
3611 | sections-construct | |
3612 | single-construct | |
3613 | parallel-for-construct | |
3614 | parallel-sections-construct | |
3615 | master-construct | |
3616 | critical-construct | |
3617 | atomic-construct | |
3618 | ordered-construct | |
3619 | ||
3620 | parallel-construct: | |
3621 | parallel-directive structured-block | |
3622 | ||
3623 | for-construct: | |
3624 | for-directive iteration-statement | |
3625 | ||
3626 | sections-construct: | |
3627 | sections-directive section-scope | |
3628 | ||
3629 | single-construct: | |
3630 | single-directive structured-block | |
3631 | ||
3632 | parallel-for-construct: | |
3633 | parallel-for-directive iteration-statement | |
3634 | ||
3635 | parallel-sections-construct: | |
3636 | parallel-sections-directive section-scope | |
3637 | ||
3638 | master-construct: | |
3639 | master-directive structured-block | |
3640 | ||
3641 | critical-construct: | |
3642 | critical-directive structured-block | |
3643 | ||
3644 | atomic-construct: | |
3645 | atomic-directive expression-statement | |
3646 | ||
3647 | ordered-construct: | |
3648 | ordered-directive structured-block */ | |
27bf414c JM |
3649 | |
3650 | static void | |
3651 | c_parser_statement (c_parser *parser) | |
3652 | { | |
3653 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3654 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3655 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3656 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3657 | c_parser_label (parser); | |
3658 | c_parser_statement_after_labels (parser); | |
3659 | } | |
3660 | ||
3661 | /* Parse a statement, other than a labeled statement. */ | |
3662 | ||
3663 | static void | |
3664 | c_parser_statement_after_labels (c_parser *parser) | |
3665 | { | |
3666 | location_t loc = c_parser_peek_token (parser)->location; | |
3667 | tree stmt = NULL_TREE; | |
b4b56033 MLI |
3668 | bool in_if_block = parser->in_if_block; |
3669 | parser->in_if_block = false; | |
27bf414c JM |
3670 | switch (c_parser_peek_token (parser)->type) |
3671 | { | |
3672 | case CPP_OPEN_BRACE: | |
3673 | add_stmt (c_parser_compound_statement (parser)); | |
3674 | break; | |
3675 | case CPP_KEYWORD: | |
3676 | switch (c_parser_peek_token (parser)->keyword) | |
3677 | { | |
3678 | case RID_IF: | |
3679 | c_parser_if_statement (parser); | |
3680 | break; | |
3681 | case RID_SWITCH: | |
3682 | c_parser_switch_statement (parser); | |
3683 | break; | |
3684 | case RID_WHILE: | |
3685 | c_parser_while_statement (parser); | |
3686 | break; | |
3687 | case RID_DO: | |
3688 | c_parser_do_statement (parser); | |
3689 | break; | |
3690 | case RID_FOR: | |
3691 | c_parser_for_statement (parser); | |
3692 | break; | |
3693 | case RID_GOTO: | |
3694 | c_parser_consume_token (parser); | |
3695 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3696 | { | |
3697 | stmt = c_finish_goto_label (c_parser_peek_token (parser)->value); | |
3698 | c_parser_consume_token (parser); | |
3699 | } | |
3700 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
3701 | { | |
3702 | c_parser_consume_token (parser); | |
3703 | stmt = c_finish_goto_ptr (c_parser_expression (parser).value); | |
3704 | } | |
3705 | else | |
3706 | c_parser_error (parser, "expected identifier or %<*%>"); | |
3707 | goto expect_semicolon; | |
3708 | case RID_CONTINUE: | |
3709 | c_parser_consume_token (parser); | |
3710 | stmt = c_finish_bc_stmt (&c_cont_label, false); | |
3711 | goto expect_semicolon; | |
3712 | case RID_BREAK: | |
3713 | c_parser_consume_token (parser); | |
3714 | stmt = c_finish_bc_stmt (&c_break_label, true); | |
3715 | goto expect_semicolon; | |
3716 | case RID_RETURN: | |
3717 | c_parser_consume_token (parser); | |
3718 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3719 | { | |
3720 | stmt = c_finish_return (NULL_TREE); | |
3721 | c_parser_consume_token (parser); | |
3722 | } | |
3723 | else | |
3724 | { | |
46bdb9cf | 3725 | stmt = c_finish_return (c_parser_expression_conv (parser).value); |
27bf414c JM |
3726 | goto expect_semicolon; |
3727 | } | |
3728 | break; | |
3729 | case RID_ASM: | |
3730 | stmt = c_parser_asm_statement (parser); | |
3731 | break; | |
eea1139b | 3732 | case RID_THROW: |
27bf414c JM |
3733 | gcc_assert (c_dialect_objc ()); |
3734 | c_parser_consume_token (parser); | |
3735 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3736 | { | |
3737 | stmt = objc_build_throw_stmt (NULL_TREE); | |
3738 | c_parser_consume_token (parser); | |
3739 | } | |
3740 | else | |
3741 | { | |
3742 | stmt | |
3743 | = objc_build_throw_stmt (c_parser_expression (parser).value); | |
3744 | goto expect_semicolon; | |
3745 | } | |
3746 | break; | |
eea1139b | 3747 | case RID_TRY: |
27bf414c JM |
3748 | gcc_assert (c_dialect_objc ()); |
3749 | c_parser_objc_try_catch_statement (parser); | |
3750 | break; | |
3751 | case RID_AT_SYNCHRONIZED: | |
3752 | gcc_assert (c_dialect_objc ()); | |
3753 | c_parser_objc_synchronized_statement (parser); | |
3754 | break; | |
3755 | default: | |
3756 | goto expr_stmt; | |
3757 | } | |
3758 | break; | |
3759 | case CPP_SEMICOLON: | |
3760 | c_parser_consume_token (parser); | |
3761 | break; | |
3762 | case CPP_CLOSE_PAREN: | |
3763 | case CPP_CLOSE_SQUARE: | |
3764 | /* Avoid infinite loop in error recovery: | |
3765 | c_parser_skip_until_found stops at a closing nesting | |
3766 | delimiter without consuming it, but here we need to consume | |
3767 | it to proceed further. */ | |
3768 | c_parser_error (parser, "expected statement"); | |
3769 | c_parser_consume_token (parser); | |
3770 | break; | |
bc4071dd RH |
3771 | case CPP_PRAGMA: |
3772 | c_parser_pragma (parser, pragma_stmt); | |
3773 | break; | |
27bf414c JM |
3774 | default: |
3775 | expr_stmt: | |
46bdb9cf | 3776 | stmt = c_finish_expr_stmt (c_parser_expression_conv (parser).value); |
27bf414c JM |
3777 | expect_semicolon: |
3778 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
3779 | break; | |
3780 | } | |
3781 | /* Two cases cannot and do not have line numbers associated: If stmt | |
3782 | is degenerate, such as "2;", then stmt is an INTEGER_CST, which | |
3783 | cannot hold line numbers. But that's OK because the statement | |
3784 | will either be changed to a MODIFY_EXPR during gimplification of | |
3785 | the statement expr, or discarded. If stmt was compound, but | |
3786 | without new variables, we will have skipped the creation of a | |
3787 | BIND and will have a bare STATEMENT_LIST. But that's OK because | |
3788 | (recursively) all of the component statements should already have | |
3789 | line numbers assigned. ??? Can we discard no-op statements | |
3790 | earlier? */ | |
c9f9eb5d | 3791 | protected_set_expr_location (stmt, loc); |
b4b56033 MLI |
3792 | |
3793 | parser->in_if_block = in_if_block; | |
27bf414c JM |
3794 | } |
3795 | ||
ca085fd7 MLI |
3796 | /* Parse the condition from an if, do, while or for statements. */ |
3797 | ||
3798 | static tree | |
3799 | c_parser_condition (c_parser *parser) | |
3800 | { | |
3801 | location_t loc; | |
3802 | tree cond; | |
3803 | loc = c_parser_peek_token (parser)->location; | |
3804 | cond = c_objc_common_truthvalue_conversion | |
ba47d38d | 3805 | (loc, c_parser_expression_conv (parser).value); |
c9f9eb5d | 3806 | protected_set_expr_location (cond, loc); |
ca085fd7 MLI |
3807 | if (warn_sequence_point) |
3808 | verify_sequence_points (cond); | |
3809 | return cond; | |
3810 | } | |
3811 | ||
27bf414c JM |
3812 | /* Parse a parenthesized condition from an if, do or while statement. |
3813 | ||
3814 | condition: | |
3815 | ( expression ) | |
3816 | */ | |
3817 | static tree | |
3818 | c_parser_paren_condition (c_parser *parser) | |
3819 | { | |
27bf414c JM |
3820 | tree cond; |
3821 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3822 | return error_mark_node; | |
ca085fd7 | 3823 | cond = c_parser_condition (parser); |
27bf414c JM |
3824 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
3825 | return cond; | |
3826 | } | |
3827 | ||
3828 | /* Parse a statement which is a block in C99. */ | |
3829 | ||
3830 | static tree | |
3831 | c_parser_c99_block_statement (c_parser *parser) | |
3832 | { | |
3833 | tree block = c_begin_compound_stmt (flag_isoc99); | |
3834 | c_parser_statement (parser); | |
3835 | return c_end_compound_stmt (block, flag_isoc99); | |
3836 | } | |
3837 | ||
b4b56033 MLI |
3838 | /* Parse the body of an if statement. This is just parsing a |
3839 | statement but (a) it is a block in C99, (b) we track whether the | |
3840 | body is an if statement for the sake of -Wparentheses warnings, (c) | |
3841 | we handle an empty body specially for the sake of -Wempty-body | |
3842 | warnings, and (d) we call parser_compound_statement directly | |
3843 | because c_parser_statement_after_labels resets | |
3844 | parser->in_if_block. */ | |
27bf414c JM |
3845 | |
3846 | static tree | |
3847 | c_parser_if_body (c_parser *parser, bool *if_p) | |
3848 | { | |
3849 | tree block = c_begin_compound_stmt (flag_isoc99); | |
3850 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3851 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3852 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3853 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3854 | c_parser_label (parser); | |
3855 | *if_p = c_parser_next_token_is_keyword (parser, RID_IF); | |
62e00e94 | 3856 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
b4b56033 | 3857 | { |
626c34b5 | 3858 | location_t loc = c_parser_peek_token (parser)->location; |
b4b56033 MLI |
3859 | add_stmt (build_empty_stmt ()); |
3860 | c_parser_consume_token (parser); | |
626c34b5 PB |
3861 | if (!c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3862 | warning_at (loc, OPT_Wempty_body, | |
3863 | "suggest braces around empty body in an %<if%> statement"); | |
b4b56033 MLI |
3864 | } |
3865 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3866 | add_stmt (c_parser_compound_statement (parser)); | |
3867 | else | |
3868 | c_parser_statement_after_labels (parser); | |
3869 | return c_end_compound_stmt (block, flag_isoc99); | |
3870 | } | |
3871 | ||
3872 | /* Parse the else body of an if statement. This is just parsing a | |
3873 | statement but (a) it is a block in C99, (b) we handle an empty body | |
3874 | specially for the sake of -Wempty-body warnings. */ | |
3875 | ||
3876 | static tree | |
3877 | c_parser_else_body (c_parser *parser) | |
3878 | { | |
3879 | tree block = c_begin_compound_stmt (flag_isoc99); | |
3880 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
3881 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
3882 | || (c_parser_next_token_is (parser, CPP_NAME) | |
3883 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
3884 | c_parser_label (parser); | |
3885 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
3886 | { | |
626c34b5 PB |
3887 | warning_at (c_parser_peek_token (parser)->location, |
3888 | OPT_Wempty_body, | |
3889 | "suggest braces around empty body in an %<else%> statement"); | |
b4b56033 MLI |
3890 | add_stmt (build_empty_stmt ()); |
3891 | c_parser_consume_token (parser); | |
3892 | } | |
3893 | else | |
3894 | c_parser_statement_after_labels (parser); | |
27bf414c JM |
3895 | return c_end_compound_stmt (block, flag_isoc99); |
3896 | } | |
3897 | ||
3898 | /* Parse an if statement (C90 6.6.4, C99 6.8.4). | |
3899 | ||
3900 | if-statement: | |
3901 | if ( expression ) statement | |
3902 | if ( expression ) statement else statement | |
3903 | */ | |
3904 | ||
3905 | static void | |
3906 | c_parser_if_statement (c_parser *parser) | |
3907 | { | |
3908 | tree block; | |
3909 | location_t loc; | |
3910 | tree cond; | |
b4b56033 | 3911 | bool first_if = false; |
27bf414c | 3912 | tree first_body, second_body; |
b4b56033 MLI |
3913 | bool in_if_block; |
3914 | ||
27bf414c JM |
3915 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF)); |
3916 | c_parser_consume_token (parser); | |
3917 | block = c_begin_compound_stmt (flag_isoc99); | |
3918 | loc = c_parser_peek_token (parser)->location; | |
3919 | cond = c_parser_paren_condition (parser); | |
b4b56033 MLI |
3920 | in_if_block = parser->in_if_block; |
3921 | parser->in_if_block = true; | |
27bf414c | 3922 | first_body = c_parser_if_body (parser, &first_if); |
b4b56033 | 3923 | parser->in_if_block = in_if_block; |
27bf414c JM |
3924 | if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
3925 | { | |
3926 | c_parser_consume_token (parser); | |
b4b56033 | 3927 | second_body = c_parser_else_body (parser); |
27bf414c JM |
3928 | } |
3929 | else | |
3930 | second_body = NULL_TREE; | |
3931 | c_finish_if_stmt (loc, cond, first_body, second_body, first_if); | |
3932 | add_stmt (c_end_compound_stmt (block, flag_isoc99)); | |
3933 | } | |
3934 | ||
3935 | /* Parse a switch statement (C90 6.6.4, C99 6.8.4). | |
3936 | ||
3937 | switch-statement: | |
3938 | switch (expression) statement | |
3939 | */ | |
3940 | ||
3941 | static void | |
3942 | c_parser_switch_statement (c_parser *parser) | |
3943 | { | |
3944 | tree block, expr, body, save_break; | |
3945 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH)); | |
3946 | c_parser_consume_token (parser); | |
3947 | block = c_begin_compound_stmt (flag_isoc99); | |
3948 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3949 | { | |
3950 | expr = c_parser_expression (parser).value; | |
3951 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
3952 | } | |
3953 | else | |
3954 | expr = error_mark_node; | |
3955 | c_start_case (expr); | |
3956 | save_break = c_break_label; | |
3957 | c_break_label = NULL_TREE; | |
3958 | body = c_parser_c99_block_statement (parser); | |
3959 | c_finish_case (body); | |
3960 | if (c_break_label) | |
b4257cfc | 3961 | add_stmt (build1 (LABEL_EXPR, void_type_node, c_break_label)); |
27bf414c JM |
3962 | c_break_label = save_break; |
3963 | add_stmt (c_end_compound_stmt (block, flag_isoc99)); | |
3964 | } | |
3965 | ||
3966 | /* Parse a while statement (C90 6.6.5, C99 6.8.5). | |
3967 | ||
3968 | while-statement: | |
3969 | while (expression) statement | |
3970 | */ | |
3971 | ||
3972 | static void | |
3973 | c_parser_while_statement (c_parser *parser) | |
3974 | { | |
3975 | tree block, cond, body, save_break, save_cont; | |
3976 | location_t loc; | |
3977 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE)); | |
3978 | c_parser_consume_token (parser); | |
3979 | block = c_begin_compound_stmt (flag_isoc99); | |
3980 | loc = c_parser_peek_token (parser)->location; | |
3981 | cond = c_parser_paren_condition (parser); | |
3982 | save_break = c_break_label; | |
3983 | c_break_label = NULL_TREE; | |
3984 | save_cont = c_cont_label; | |
3985 | c_cont_label = NULL_TREE; | |
3986 | body = c_parser_c99_block_statement (parser); | |
3987 | c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true); | |
3988 | add_stmt (c_end_compound_stmt (block, flag_isoc99)); | |
3989 | c_break_label = save_break; | |
3990 | c_cont_label = save_cont; | |
3991 | } | |
3992 | ||
3993 | /* Parse a do statement (C90 6.6.5, C99 6.8.5). | |
3994 | ||
3995 | do-statement: | |
3996 | do statement while ( expression ) ; | |
3997 | */ | |
3998 | ||
3999 | static void | |
4000 | c_parser_do_statement (c_parser *parser) | |
4001 | { | |
4002 | tree block, cond, body, save_break, save_cont, new_break, new_cont; | |
4003 | location_t loc; | |
4004 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO)); | |
4005 | c_parser_consume_token (parser); | |
62e00e94 | 4006 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3ba09659 AH |
4007 | warning_at (c_parser_peek_token (parser)->location, |
4008 | OPT_Wempty_body, | |
4009 | "suggest braces around empty body in %<do%> statement"); | |
27bf414c JM |
4010 | block = c_begin_compound_stmt (flag_isoc99); |
4011 | loc = c_parser_peek_token (parser)->location; | |
4012 | save_break = c_break_label; | |
4013 | c_break_label = NULL_TREE; | |
4014 | save_cont = c_cont_label; | |
4015 | c_cont_label = NULL_TREE; | |
4016 | body = c_parser_c99_block_statement (parser); | |
4017 | c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>"); | |
4018 | new_break = c_break_label; | |
4019 | c_break_label = save_break; | |
4020 | new_cont = c_cont_label; | |
4021 | c_cont_label = save_cont; | |
4022 | cond = c_parser_paren_condition (parser); | |
4023 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4024 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4025 | c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false); | |
4026 | add_stmt (c_end_compound_stmt (block, flag_isoc99)); | |
4027 | } | |
4028 | ||
4029 | /* Parse a for statement (C90 6.6.5, C99 6.8.5). | |
4030 | ||
4031 | for-statement: | |
4032 | for ( expression[opt] ; expression[opt] ; expression[opt] ) statement | |
4033 | for ( nested-declaration expression[opt] ; expression[opt] ) statement | |
4034 | ||
4035 | The form with a declaration is new in C99. | |
4036 | ||
4037 | ??? In accordance with the old parser, the declaration may be a | |
4038 | nested function, which is then rejected in check_for_loop_decls, | |
4039 | but does it make any sense for this to be included in the grammar? | |
4040 | Note in particular that the nested function does not include a | |
4041 | trailing ';', whereas the "declaration" production includes one. | |
4042 | Also, can we reject bad declarations earlier and cheaper than | |
4043 | check_for_loop_decls? */ | |
4044 | ||
4045 | static void | |
4046 | c_parser_for_statement (c_parser *parser) | |
4047 | { | |
4048 | tree block, cond, incr, save_break, save_cont, body; | |
24871154 | 4049 | location_t loc; |
27bf414c | 4050 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR)); |
24871154 | 4051 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4052 | c_parser_consume_token (parser); |
4053 | block = c_begin_compound_stmt (flag_isoc99); | |
4054 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4055 | { | |
4056 | /* Parse the initialization declaration or expression. */ | |
4057 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4058 | { | |
4059 | c_parser_consume_token (parser); | |
4060 | c_finish_expr_stmt (NULL_TREE); | |
4061 | } | |
4062 | else if (c_parser_next_token_starts_declspecs (parser)) | |
4063 | { | |
4064 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
4065 | check_for_loop_decls (); | |
4066 | } | |
4067 | else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4068 | { | |
4069 | /* __extension__ can start a declaration, but is also an | |
4070 | unary operator that can start an expression. Consume all | |
4071 | but the last of a possible series of __extension__ to | |
4072 | determine which. */ | |
4073 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4074 | && (c_parser_peek_2nd_token (parser)->keyword | |
4075 | == RID_EXTENSION)) | |
4076 | c_parser_consume_token (parser); | |
4077 | if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser))) | |
4078 | { | |
4079 | int ext; | |
4080 | ext = disable_extension_diagnostics (); | |
4081 | c_parser_consume_token (parser); | |
4082 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
4083 | restore_extension_diagnostics (ext); | |
4084 | check_for_loop_decls (); | |
4085 | } | |
4086 | else | |
4087 | goto init_expr; | |
4088 | } | |
4089 | else | |
4090 | { | |
4091 | init_expr: | |
4092 | c_finish_expr_stmt (c_parser_expression (parser).value); | |
4093 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4094 | } | |
4095 | /* Parse the loop condition. */ | |
27bf414c JM |
4096 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4097 | { | |
4098 | c_parser_consume_token (parser); | |
4099 | cond = NULL_TREE; | |
4100 | } | |
4101 | else | |
4102 | { | |
ca085fd7 | 4103 | cond = c_parser_condition (parser); |
27bf414c JM |
4104 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
4105 | } | |
4106 | /* Parse the increment expression. */ | |
4107 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4108 | incr = c_process_expr_stmt (NULL_TREE); | |
4109 | else | |
4110 | incr = c_process_expr_stmt (c_parser_expression (parser).value); | |
4111 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4112 | } | |
4113 | else | |
4114 | { | |
4115 | cond = error_mark_node; | |
4116 | incr = error_mark_node; | |
4117 | } | |
4118 | save_break = c_break_label; | |
4119 | c_break_label = NULL_TREE; | |
4120 | save_cont = c_cont_label; | |
4121 | c_cont_label = NULL_TREE; | |
4122 | body = c_parser_c99_block_statement (parser); | |
4123 | c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true); | |
4124 | add_stmt (c_end_compound_stmt (block, flag_isoc99)); | |
4125 | c_break_label = save_break; | |
4126 | c_cont_label = save_cont; | |
4127 | } | |
4128 | ||
4129 | /* Parse an asm statement, a GNU extension. This is a full-blown asm | |
4130 | statement with inputs, outputs, clobbers, and volatile tag | |
4131 | allowed. | |
4132 | ||
4133 | asm-statement: | |
4134 | asm type-qualifier[opt] ( asm-argument ) ; | |
4135 | ||
4136 | asm-argument: | |
4137 | asm-string-literal | |
4138 | asm-string-literal : asm-operands[opt] | |
4139 | asm-string-literal : asm-operands[opt] : asm-operands[opt] | |
4140 | asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers | |
4141 | ||
4142 | Qualifiers other than volatile are accepted in the syntax but | |
4143 | warned for. */ | |
4144 | ||
4145 | static tree | |
4146 | c_parser_asm_statement (c_parser *parser) | |
4147 | { | |
4148 | tree quals, str, outputs, inputs, clobbers, ret; | |
4149 | bool simple; | |
4150 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
4151 | c_parser_consume_token (parser); | |
4152 | if (c_parser_next_token_is_keyword (parser, RID_VOLATILE)) | |
4153 | { | |
4154 | quals = c_parser_peek_token (parser)->value; | |
4155 | c_parser_consume_token (parser); | |
4156 | } | |
4157 | else if (c_parser_next_token_is_keyword (parser, RID_CONST) | |
4158 | || c_parser_next_token_is_keyword (parser, RID_RESTRICT)) | |
4159 | { | |
3ba09659 AH |
4160 | warning_at (c_parser_peek_token (parser)->location, |
4161 | 0, | |
4162 | "%E qualifier ignored on asm", | |
4163 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
4164 | quals = NULL_TREE; |
4165 | c_parser_consume_token (parser); | |
4166 | } | |
4167 | else | |
4168 | quals = NULL_TREE; | |
4169 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
4170 | lex_untranslated_string kludge. */ |
4171 | parser->lex_untranslated_string = true; | |
27bf414c JM |
4172 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4173 | { | |
46c2514e | 4174 | parser->lex_untranslated_string = false; |
27bf414c JM |
4175 | return NULL_TREE; |
4176 | } | |
4177 | str = c_parser_asm_string_literal (parser); | |
4178 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4179 | { | |
4180 | simple = true; | |
4181 | outputs = NULL_TREE; | |
4182 | inputs = NULL_TREE; | |
4183 | clobbers = NULL_TREE; | |
4184 | goto done_asm; | |
4185 | } | |
4186 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>")) | |
4187 | { | |
46c2514e | 4188 | parser->lex_untranslated_string = false; |
27bf414c JM |
4189 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
4190 | return NULL_TREE; | |
4191 | } | |
4192 | simple = false; | |
4193 | /* Parse outputs. */ | |
4194 | if (c_parser_next_token_is (parser, CPP_COLON) | |
4195 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4196 | outputs = NULL_TREE; | |
4197 | else | |
46bdb9cf | 4198 | outputs = c_parser_asm_operands (parser, false); |
27bf414c JM |
4199 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) |
4200 | { | |
4201 | inputs = NULL_TREE; | |
4202 | clobbers = NULL_TREE; | |
4203 | goto done_asm; | |
4204 | } | |
4205 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>")) | |
4206 | { | |
46c2514e | 4207 | parser->lex_untranslated_string = false; |
27bf414c JM |
4208 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
4209 | return NULL_TREE; | |
4210 | } | |
4211 | /* Parse inputs. */ | |
4212 | if (c_parser_next_token_is (parser, CPP_COLON) | |
4213 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
4214 | inputs = NULL_TREE; | |
4215 | else | |
46bdb9cf | 4216 | inputs = c_parser_asm_operands (parser, true); |
27bf414c JM |
4217 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) |
4218 | { | |
4219 | clobbers = NULL_TREE; | |
4220 | goto done_asm; | |
4221 | } | |
4222 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%> or %<)%>")) | |
4223 | { | |
46c2514e | 4224 | parser->lex_untranslated_string = false; |
27bf414c JM |
4225 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
4226 | return NULL_TREE; | |
4227 | } | |
4228 | /* Parse clobbers. */ | |
4229 | clobbers = c_parser_asm_clobbers (parser); | |
4230 | done_asm: | |
46c2514e | 4231 | parser->lex_untranslated_string = false; |
27bf414c JM |
4232 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4233 | { | |
4234 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4235 | return NULL_TREE; | |
4236 | } | |
4237 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4238 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4239 | ret = build_asm_stmt (quals, build_asm_expr (str, outputs, inputs, | |
4240 | clobbers, simple)); | |
4241 | return ret; | |
4242 | } | |
4243 | ||
46bdb9cf JM |
4244 | /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but |
4245 | not outputs), apply the default conversion of functions and arrays | |
4246 | to pointers. | |
27bf414c JM |
4247 | |
4248 | asm-operands: | |
4249 | asm-operand | |
4250 | asm-operands , asm-operand | |
4251 | ||
4252 | asm-operand: | |
4253 | asm-string-literal ( expression ) | |
4254 | [ identifier ] asm-string-literal ( expression ) | |
4255 | */ | |
4256 | ||
4257 | static tree | |
46bdb9cf | 4258 | c_parser_asm_operands (c_parser *parser, bool convert_p) |
27bf414c JM |
4259 | { |
4260 | tree list = NULL_TREE; | |
4261 | while (true) | |
4262 | { | |
f2a71bbc JM |
4263 | tree name, str; |
4264 | struct c_expr expr; | |
27bf414c JM |
4265 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) |
4266 | { | |
4267 | c_parser_consume_token (parser); | |
4268 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4269 | { | |
4270 | tree id = c_parser_peek_token (parser)->value; | |
4271 | c_parser_consume_token (parser); | |
4272 | name = build_string (IDENTIFIER_LENGTH (id), | |
4273 | IDENTIFIER_POINTER (id)); | |
4274 | } | |
4275 | else | |
4276 | { | |
4277 | c_parser_error (parser, "expected identifier"); | |
4278 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL); | |
4279 | return NULL_TREE; | |
4280 | } | |
4281 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
4282 | "expected %<]%>"); | |
4283 | } | |
4284 | else | |
4285 | name = NULL_TREE; | |
4286 | str = c_parser_asm_string_literal (parser); | |
4287 | if (str == NULL_TREE) | |
4288 | return NULL_TREE; | |
46c2514e | 4289 | parser->lex_untranslated_string = false; |
27bf414c JM |
4290 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4291 | { | |
46c2514e | 4292 | parser->lex_untranslated_string = true; |
27bf414c JM |
4293 | return NULL_TREE; |
4294 | } | |
f2a71bbc | 4295 | expr = c_parser_expression (parser); |
46bdb9cf JM |
4296 | if (convert_p) |
4297 | expr = default_function_array_conversion (expr); | |
46c2514e | 4298 | parser->lex_untranslated_string = true; |
27bf414c JM |
4299 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
4300 | { | |
4301 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
4302 | return NULL_TREE; | |
4303 | } | |
4304 | list = chainon (list, build_tree_list (build_tree_list (name, str), | |
f2a71bbc | 4305 | expr.value)); |
27bf414c JM |
4306 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
4307 | c_parser_consume_token (parser); | |
4308 | else | |
4309 | break; | |
4310 | } | |
4311 | return list; | |
4312 | } | |
4313 | ||
4314 | /* Parse asm clobbers, a GNU extension. | |
4315 | ||
4316 | asm-clobbers: | |
4317 | asm-string-literal | |
4318 | asm-clobbers , asm-string-literal | |
4319 | */ | |
4320 | ||
4321 | static tree | |
4322 | c_parser_asm_clobbers (c_parser *parser) | |
4323 | { | |
4324 | tree list = NULL_TREE; | |
4325 | while (true) | |
4326 | { | |
4327 | tree str = c_parser_asm_string_literal (parser); | |
4328 | if (str) | |
4329 | list = tree_cons (NULL_TREE, str, list); | |
4330 | else | |
4331 | return NULL_TREE; | |
4332 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4333 | c_parser_consume_token (parser); | |
4334 | else | |
4335 | break; | |
4336 | } | |
4337 | return list; | |
4338 | } | |
4339 | ||
4340 | /* Parse an expression other than a compound expression; that is, an | |
4341 | assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not | |
4342 | NULL then it is an Objective-C message expression which is the | |
4343 | primary-expression starting the expression as an initializer. | |
4344 | ||
4345 | assignment-expression: | |
4346 | conditional-expression | |
4347 | unary-expression assignment-operator assignment-expression | |
4348 | ||
4349 | assignment-operator: one of | |
4350 | = *= /= %= += -= <<= >>= &= ^= |= | |
4351 | ||
4352 | In GNU C we accept any conditional expression on the LHS and | |
4353 | diagnose the invalid lvalue rather than producing a syntax | |
4354 | error. */ | |
4355 | ||
4356 | static struct c_expr | |
4357 | c_parser_expr_no_commas (c_parser *parser, struct c_expr *after) | |
4358 | { | |
4359 | struct c_expr lhs, rhs, ret; | |
4360 | enum tree_code code; | |
c9f9eb5d | 4361 | location_t op_location; |
27bf414c JM |
4362 | gcc_assert (!after || c_dialect_objc ()); |
4363 | lhs = c_parser_conditional_expression (parser, after); | |
c9f9eb5d | 4364 | op_location = c_parser_peek_token (parser)->location; |
27bf414c JM |
4365 | switch (c_parser_peek_token (parser)->type) |
4366 | { | |
4367 | case CPP_EQ: | |
4368 | code = NOP_EXPR; | |
4369 | break; | |
4370 | case CPP_MULT_EQ: | |
4371 | code = MULT_EXPR; | |
4372 | break; | |
4373 | case CPP_DIV_EQ: | |
4374 | code = TRUNC_DIV_EXPR; | |
4375 | break; | |
4376 | case CPP_MOD_EQ: | |
4377 | code = TRUNC_MOD_EXPR; | |
4378 | break; | |
4379 | case CPP_PLUS_EQ: | |
4380 | code = PLUS_EXPR; | |
4381 | break; | |
4382 | case CPP_MINUS_EQ: | |
4383 | code = MINUS_EXPR; | |
4384 | break; | |
4385 | case CPP_LSHIFT_EQ: | |
4386 | code = LSHIFT_EXPR; | |
4387 | break; | |
4388 | case CPP_RSHIFT_EQ: | |
4389 | code = RSHIFT_EXPR; | |
4390 | break; | |
4391 | case CPP_AND_EQ: | |
4392 | code = BIT_AND_EXPR; | |
4393 | break; | |
4394 | case CPP_XOR_EQ: | |
4395 | code = BIT_XOR_EXPR; | |
4396 | break; | |
4397 | case CPP_OR_EQ: | |
4398 | code = BIT_IOR_EXPR; | |
4399 | break; | |
4400 | default: | |
4401 | return lhs; | |
4402 | } | |
4403 | c_parser_consume_token (parser); | |
4404 | rhs = c_parser_expr_no_commas (parser, NULL); | |
f2a71bbc | 4405 | rhs = default_function_array_conversion (rhs); |
c9f9eb5d | 4406 | ret.value = build_modify_expr (op_location, lhs.value, code, rhs.value); |
27bf414c JM |
4407 | if (code == NOP_EXPR) |
4408 | ret.original_code = MODIFY_EXPR; | |
4409 | else | |
4410 | { | |
4411 | TREE_NO_WARNING (ret.value) = 1; | |
4412 | ret.original_code = ERROR_MARK; | |
4413 | } | |
4414 | return ret; | |
4415 | } | |
4416 | ||
4417 | /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER | |
4418 | is not NULL then it is an Objective-C message expression which is | |
4419 | the primary-expression starting the expression as an initializer. | |
4420 | ||
4421 | conditional-expression: | |
4422 | logical-OR-expression | |
4423 | logical-OR-expression ? expression : conditional-expression | |
4424 | ||
4425 | GNU extensions: | |
4426 | ||
4427 | conditional-expression: | |
4428 | logical-OR-expression ? : conditional-expression | |
4429 | */ | |
4430 | ||
4431 | static struct c_expr | |
4432 | c_parser_conditional_expression (c_parser *parser, struct c_expr *after) | |
4433 | { | |
4434 | struct c_expr cond, exp1, exp2, ret; | |
ba47d38d AH |
4435 | location_t cond_loc; |
4436 | ||
27bf414c | 4437 | gcc_assert (!after || c_dialect_objc ()); |
ba47d38d AH |
4438 | |
4439 | cond_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 4440 | cond = c_parser_binary_expression (parser, after); |
c9f9eb5d | 4441 | protected_set_expr_location (cond.value, cond_loc); |
ba47d38d | 4442 | |
27bf414c JM |
4443 | if (c_parser_next_token_is_not (parser, CPP_QUERY)) |
4444 | return cond; | |
f2a71bbc | 4445 | cond = default_function_array_conversion (cond); |
27bf414c JM |
4446 | c_parser_consume_token (parser); |
4447 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
4448 | { | |
509c9d60 MLI |
4449 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
4450 | "ISO C forbids omitting the middle term of a ?: expression"); | |
27bf414c JM |
4451 | /* Make sure first operand is calculated only once. */ |
4452 | exp1.value = save_expr (default_conversion (cond.value)); | |
ba47d38d | 4453 | cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value); |
27bf414c JM |
4454 | skip_evaluation += cond.value == truthvalue_true_node; |
4455 | } | |
4456 | else | |
4457 | { | |
4458 | cond.value | |
85498824 | 4459 | = c_objc_common_truthvalue_conversion |
ba47d38d | 4460 | (cond_loc, default_conversion (cond.value)); |
27bf414c | 4461 | skip_evaluation += cond.value == truthvalue_false_node; |
46bdb9cf | 4462 | exp1 = c_parser_expression_conv (parser); |
27bf414c JM |
4463 | skip_evaluation += ((cond.value == truthvalue_true_node) |
4464 | - (cond.value == truthvalue_false_node)); | |
4465 | } | |
4466 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
4467 | { | |
4468 | skip_evaluation -= cond.value == truthvalue_true_node; | |
4469 | ret.value = error_mark_node; | |
4470 | ret.original_code = ERROR_MARK; | |
4471 | return ret; | |
4472 | } | |
4473 | exp2 = c_parser_conditional_expression (parser, NULL); | |
f2a71bbc | 4474 | exp2 = default_function_array_conversion (exp2); |
27bf414c JM |
4475 | skip_evaluation -= cond.value == truthvalue_true_node; |
4476 | ret.value = build_conditional_expr (cond.value, exp1.value, exp2.value); | |
4477 | ret.original_code = ERROR_MARK; | |
4478 | return ret; | |
4479 | } | |
4480 | ||
4481 | /* Parse a binary expression; that is, a logical-OR-expression (C90 | |
4482 | 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is | |
4483 | an Objective-C message expression which is the primary-expression | |
4484 | starting the expression as an initializer. | |
4485 | ||
4486 | multiplicative-expression: | |
4487 | cast-expression | |
4488 | multiplicative-expression * cast-expression | |
4489 | multiplicative-expression / cast-expression | |
4490 | multiplicative-expression % cast-expression | |
4491 | ||
4492 | additive-expression: | |
4493 | multiplicative-expression | |
4494 | additive-expression + multiplicative-expression | |
4495 | additive-expression - multiplicative-expression | |
4496 | ||
4497 | shift-expression: | |
4498 | additive-expression | |
4499 | shift-expression << additive-expression | |
4500 | shift-expression >> additive-expression | |
4501 | ||
4502 | relational-expression: | |
4503 | shift-expression | |
4504 | relational-expression < shift-expression | |
4505 | relational-expression > shift-expression | |
4506 | relational-expression <= shift-expression | |
4507 | relational-expression >= shift-expression | |
4508 | ||
4509 | equality-expression: | |
4510 | relational-expression | |
4511 | equality-expression == relational-expression | |
4512 | equality-expression != relational-expression | |
4513 | ||
4514 | AND-expression: | |
4515 | equality-expression | |
4516 | AND-expression & equality-expression | |
4517 | ||
4518 | exclusive-OR-expression: | |
4519 | AND-expression | |
4520 | exclusive-OR-expression ^ AND-expression | |
4521 | ||
4522 | inclusive-OR-expression: | |
4523 | exclusive-OR-expression | |
4524 | inclusive-OR-expression | exclusive-OR-expression | |
4525 | ||
4526 | logical-AND-expression: | |
4527 | inclusive-OR-expression | |
4528 | logical-AND-expression && inclusive-OR-expression | |
4529 | ||
4530 | logical-OR-expression: | |
4531 | logical-AND-expression | |
4532 | logical-OR-expression || logical-AND-expression | |
4533 | */ | |
4534 | ||
4535 | static struct c_expr | |
4536 | c_parser_binary_expression (c_parser *parser, struct c_expr *after) | |
4537 | { | |
4538 | /* A binary expression is parsed using operator-precedence parsing, | |
4539 | with the operands being cast expressions. All the binary | |
4540 | operators are left-associative. Thus a binary expression is of | |
4541 | form: | |
4542 | ||
4543 | E0 op1 E1 op2 E2 ... | |
4544 | ||
4545 | which we represent on a stack. On the stack, the precedence | |
4546 | levels are strictly increasing. When a new operator is | |
4547 | encountered of higher precedence than that at the top of the | |
4548 | stack, it is pushed; its LHS is the top expression, and its RHS | |
4549 | is everything parsed until it is popped. When a new operator is | |
4550 | encountered with precedence less than or equal to that at the top | |
4551 | of the stack, triples E[i-1] op[i] E[i] are popped and replaced | |
4552 | by the result of the operation until the operator at the top of | |
4553 | the stack has lower precedence than the new operator or there is | |
4554 | only one element on the stack; then the top expression is the LHS | |
4555 | of the new operator. In the case of logical AND and OR | |
4556 | expressions, we also need to adjust skip_evaluation as | |
4557 | appropriate when the operators are pushed and popped. */ | |
4558 | ||
4559 | /* The precedence levels, where 0 is a dummy lowest level used for | |
4560 | the bottom of the stack. */ | |
4561 | enum prec { | |
4562 | PREC_NONE, | |
4563 | PREC_LOGOR, | |
4564 | PREC_LOGAND, | |
4565 | PREC_BITOR, | |
4566 | PREC_BITXOR, | |
4567 | PREC_BITAND, | |
4568 | PREC_EQ, | |
4569 | PREC_REL, | |
4570 | PREC_SHIFT, | |
4571 | PREC_ADD, | |
4572 | PREC_MULT, | |
4573 | NUM_PRECS | |
4574 | }; | |
4575 | struct { | |
4576 | /* The expression at this stack level. */ | |
4577 | struct c_expr expr; | |
4578 | /* The precedence of the operator on its left, PREC_NONE at the | |
4579 | bottom of the stack. */ | |
4580 | enum prec prec; | |
4581 | /* The operation on its left. */ | |
4582 | enum tree_code op; | |
4583 | } stack[NUM_PRECS]; | |
4584 | int sp; | |
ba47d38d | 4585 | /* Location of the binary operator. */ |
1f6d0c60 | 4586 | location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
4587 | #define POP \ |
4588 | do { \ | |
4589 | switch (stack[sp].op) \ | |
4590 | { \ | |
4591 | case TRUTH_ANDIF_EXPR: \ | |
4592 | skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \ | |
4593 | break; \ | |
4594 | case TRUTH_ORIF_EXPR: \ | |
4595 | skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \ | |
4596 | break; \ | |
4597 | default: \ | |
4598 | break; \ | |
4599 | } \ | |
f2a71bbc JM |
4600 | stack[sp - 1].expr \ |
4601 | = default_function_array_conversion (stack[sp - 1].expr); \ | |
4602 | stack[sp].expr \ | |
4603 | = default_function_array_conversion (stack[sp].expr); \ | |
ba47d38d AH |
4604 | stack[sp - 1].expr = parser_build_binary_op (binary_loc, \ |
4605 | stack[sp].op, \ | |
27bf414c JM |
4606 | stack[sp - 1].expr, \ |
4607 | stack[sp].expr); \ | |
4608 | sp--; \ | |
4609 | } while (0) | |
4610 | gcc_assert (!after || c_dialect_objc ()); | |
4611 | stack[0].expr = c_parser_cast_expression (parser, after); | |
4612 | stack[0].prec = PREC_NONE; | |
4613 | sp = 0; | |
4614 | while (true) | |
4615 | { | |
4616 | enum prec oprec; | |
4617 | enum tree_code ocode; | |
4618 | if (parser->error) | |
4619 | goto out; | |
4620 | switch (c_parser_peek_token (parser)->type) | |
4621 | { | |
4622 | case CPP_MULT: | |
4623 | oprec = PREC_MULT; | |
4624 | ocode = MULT_EXPR; | |
4625 | break; | |
4626 | case CPP_DIV: | |
4627 | oprec = PREC_MULT; | |
4628 | ocode = TRUNC_DIV_EXPR; | |
4629 | break; | |
4630 | case CPP_MOD: | |
4631 | oprec = PREC_MULT; | |
4632 | ocode = TRUNC_MOD_EXPR; | |
4633 | break; | |
4634 | case CPP_PLUS: | |
4635 | oprec = PREC_ADD; | |
4636 | ocode = PLUS_EXPR; | |
4637 | break; | |
4638 | case CPP_MINUS: | |
4639 | oprec = PREC_ADD; | |
4640 | ocode = MINUS_EXPR; | |
4641 | break; | |
4642 | case CPP_LSHIFT: | |
4643 | oprec = PREC_SHIFT; | |
4644 | ocode = LSHIFT_EXPR; | |
4645 | break; | |
4646 | case CPP_RSHIFT: | |
4647 | oprec = PREC_SHIFT; | |
4648 | ocode = RSHIFT_EXPR; | |
4649 | break; | |
4650 | case CPP_LESS: | |
4651 | oprec = PREC_REL; | |
4652 | ocode = LT_EXPR; | |
4653 | break; | |
4654 | case CPP_GREATER: | |
4655 | oprec = PREC_REL; | |
4656 | ocode = GT_EXPR; | |
4657 | break; | |
4658 | case CPP_LESS_EQ: | |
4659 | oprec = PREC_REL; | |
4660 | ocode = LE_EXPR; | |
4661 | break; | |
4662 | case CPP_GREATER_EQ: | |
4663 | oprec = PREC_REL; | |
4664 | ocode = GE_EXPR; | |
4665 | break; | |
4666 | case CPP_EQ_EQ: | |
4667 | oprec = PREC_EQ; | |
4668 | ocode = EQ_EXPR; | |
4669 | break; | |
4670 | case CPP_NOT_EQ: | |
4671 | oprec = PREC_EQ; | |
4672 | ocode = NE_EXPR; | |
4673 | break; | |
4674 | case CPP_AND: | |
4675 | oprec = PREC_BITAND; | |
4676 | ocode = BIT_AND_EXPR; | |
4677 | break; | |
4678 | case CPP_XOR: | |
4679 | oprec = PREC_BITXOR; | |
4680 | ocode = BIT_XOR_EXPR; | |
4681 | break; | |
4682 | case CPP_OR: | |
4683 | oprec = PREC_BITOR; | |
4684 | ocode = BIT_IOR_EXPR; | |
4685 | break; | |
4686 | case CPP_AND_AND: | |
4687 | oprec = PREC_LOGAND; | |
4688 | ocode = TRUTH_ANDIF_EXPR; | |
4689 | break; | |
4690 | case CPP_OR_OR: | |
4691 | oprec = PREC_LOGOR; | |
4692 | ocode = TRUTH_ORIF_EXPR; | |
4693 | break; | |
4694 | default: | |
4695 | /* Not a binary operator, so end of the binary | |
4696 | expression. */ | |
4697 | goto out; | |
4698 | } | |
ba47d38d | 4699 | binary_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4700 | c_parser_consume_token (parser); |
4701 | while (oprec <= stack[sp].prec) | |
4702 | POP; | |
4703 | switch (ocode) | |
4704 | { | |
4705 | case TRUTH_ANDIF_EXPR: | |
f2a71bbc JM |
4706 | stack[sp].expr |
4707 | = default_function_array_conversion (stack[sp].expr); | |
85498824 | 4708 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ba47d38d | 4709 | (binary_loc, default_conversion (stack[sp].expr.value)); |
27bf414c JM |
4710 | skip_evaluation += stack[sp].expr.value == truthvalue_false_node; |
4711 | break; | |
4712 | case TRUTH_ORIF_EXPR: | |
f2a71bbc JM |
4713 | stack[sp].expr |
4714 | = default_function_array_conversion (stack[sp].expr); | |
85498824 | 4715 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ba47d38d | 4716 | (binary_loc, default_conversion (stack[sp].expr.value)); |
27bf414c JM |
4717 | skip_evaluation += stack[sp].expr.value == truthvalue_true_node; |
4718 | break; | |
4719 | default: | |
4720 | break; | |
4721 | } | |
4722 | sp++; | |
4723 | stack[sp].expr = c_parser_cast_expression (parser, NULL); | |
4724 | stack[sp].prec = oprec; | |
4725 | stack[sp].op = ocode; | |
4726 | } | |
4727 | out: | |
4728 | while (sp > 0) | |
4729 | POP; | |
4730 | return stack[0].expr; | |
4731 | #undef POP | |
4732 | } | |
4733 | ||
4734 | /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not | |
4735 | NULL then it is an Objective-C message expression which is the | |
4736 | primary-expression starting the expression as an initializer. | |
4737 | ||
4738 | cast-expression: | |
4739 | unary-expression | |
4740 | ( type-name ) unary-expression | |
4741 | */ | |
4742 | ||
4743 | static struct c_expr | |
4744 | c_parser_cast_expression (c_parser *parser, struct c_expr *after) | |
4745 | { | |
4746 | gcc_assert (!after || c_dialect_objc ()); | |
4747 | if (after) | |
4748 | return c_parser_postfix_expression_after_primary (parser, *after); | |
4749 | /* If the expression begins with a parenthesized type name, it may | |
4750 | be either a cast or a compound literal; we need to see whether | |
4751 | the next character is '{' to tell the difference. If not, it is | |
4752 | an unary expression. */ | |
4753 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
4754 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
4755 | { | |
4756 | struct c_type_name *type_name; | |
4757 | struct c_expr ret; | |
f2a71bbc | 4758 | struct c_expr expr; |
27bf414c JM |
4759 | c_parser_consume_token (parser); |
4760 | type_name = c_parser_type_name (parser); | |
4761 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4762 | if (type_name == NULL) | |
4763 | { | |
4764 | ret.value = error_mark_node; | |
4765 | ret.original_code = ERROR_MARK; | |
4766 | return ret; | |
4767 | } | |
33c9159e AH |
4768 | |
4769 | /* Save casted types in the function's used types hash table. */ | |
8d8d1a28 | 4770 | used_types_insert (type_name->specs->type); |
33c9159e | 4771 | |
27bf414c JM |
4772 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
4773 | return c_parser_postfix_expression_after_paren_type (parser, | |
4774 | type_name); | |
f2a71bbc | 4775 | expr = c_parser_cast_expression (parser, NULL); |
46bdb9cf | 4776 | expr = default_function_array_conversion (expr); |
f2a71bbc | 4777 | ret.value = c_cast_expr (type_name, expr.value); |
27bf414c JM |
4778 | ret.original_code = ERROR_MARK; |
4779 | return ret; | |
4780 | } | |
4781 | else | |
4782 | return c_parser_unary_expression (parser); | |
4783 | } | |
4784 | ||
4785 | /* Parse an unary expression (C90 6.3.3, C99 6.5.3). | |
4786 | ||
4787 | unary-expression: | |
4788 | postfix-expression | |
4789 | ++ unary-expression | |
4790 | -- unary-expression | |
4791 | unary-operator cast-expression | |
4792 | sizeof unary-expression | |
4793 | sizeof ( type-name ) | |
4794 | ||
4795 | unary-operator: one of | |
4796 | & * + - ~ ! | |
4797 | ||
4798 | GNU extensions: | |
4799 | ||
4800 | unary-expression: | |
4801 | __alignof__ unary-expression | |
4802 | __alignof__ ( type-name ) | |
4803 | && identifier | |
4804 | ||
4805 | unary-operator: one of | |
4806 | __extension__ __real__ __imag__ | |
4807 | ||
4808 | In addition, the GNU syntax treats ++ and -- as unary operators, so | |
4809 | they may be applied to cast expressions with errors for non-lvalues | |
4810 | given later. */ | |
4811 | ||
4812 | static struct c_expr | |
4813 | c_parser_unary_expression (c_parser *parser) | |
4814 | { | |
4815 | int ext; | |
46bdb9cf | 4816 | struct c_expr ret, op; |
6a3799eb | 4817 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4818 | switch (c_parser_peek_token (parser)->type) |
4819 | { | |
4820 | case CPP_PLUS_PLUS: | |
4821 | c_parser_consume_token (parser); | |
46bdb9cf | 4822 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4823 | op = default_function_array_conversion (op); |
6a3799eb | 4824 | return parser_build_unary_op (PREINCREMENT_EXPR, op, loc); |
27bf414c JM |
4825 | case CPP_MINUS_MINUS: |
4826 | c_parser_consume_token (parser); | |
46bdb9cf | 4827 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4828 | op = default_function_array_conversion (op); |
6a3799eb | 4829 | return parser_build_unary_op (PREDECREMENT_EXPR, op, loc); |
27bf414c JM |
4830 | case CPP_AND: |
4831 | c_parser_consume_token (parser); | |
43f6dfd3 | 4832 | return parser_build_unary_op (ADDR_EXPR, |
6a3799eb AH |
4833 | c_parser_cast_expression (parser, NULL), |
4834 | loc); | |
27bf414c JM |
4835 | case CPP_MULT: |
4836 | c_parser_consume_token (parser); | |
46bdb9cf | 4837 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4838 | op = default_function_array_conversion (op); |
c9f9eb5d | 4839 | ret.value = build_indirect_ref (loc, op.value, "unary *"); |
43f6dfd3 | 4840 | ret.original_code = ERROR_MARK; |
27bf414c JM |
4841 | return ret; |
4842 | case CPP_PLUS: | |
44c21c7f | 4843 | if (!c_dialect_objc () && !in_system_header) |
3ba09659 AH |
4844 | warning_at (c_parser_peek_token (parser)->location, |
4845 | OPT_Wtraditional, | |
4846 | "traditional C rejects the unary plus operator"); | |
c7412148 | 4847 | c_parser_consume_token (parser); |
46bdb9cf | 4848 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4849 | op = default_function_array_conversion (op); |
6a3799eb | 4850 | return parser_build_unary_op (CONVERT_EXPR, op, loc); |
27bf414c JM |
4851 | case CPP_MINUS: |
4852 | c_parser_consume_token (parser); | |
46bdb9cf | 4853 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4854 | op = default_function_array_conversion (op); |
6a3799eb | 4855 | return parser_build_unary_op (NEGATE_EXPR, op, loc); |
27bf414c JM |
4856 | case CPP_COMPL: |
4857 | c_parser_consume_token (parser); | |
46bdb9cf | 4858 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4859 | op = default_function_array_conversion (op); |
6a3799eb | 4860 | return parser_build_unary_op (BIT_NOT_EXPR, op, loc); |
27bf414c JM |
4861 | case CPP_NOT: |
4862 | c_parser_consume_token (parser); | |
46bdb9cf | 4863 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4864 | op = default_function_array_conversion (op); |
6a3799eb | 4865 | return parser_build_unary_op (TRUTH_NOT_EXPR, op, loc); |
27bf414c JM |
4866 | case CPP_AND_AND: |
4867 | /* Refer to the address of a label as a pointer. */ | |
4868 | c_parser_consume_token (parser); | |
4869 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4870 | { | |
4871 | ret.value = finish_label_address_expr | |
6a3799eb | 4872 | (c_parser_peek_token (parser)->value, loc); |
27bf414c | 4873 | c_parser_consume_token (parser); |
27bf414c JM |
4874 | } |
4875 | else | |
4876 | { | |
4877 | c_parser_error (parser, "expected identifier"); | |
4878 | ret.value = error_mark_node; | |
27bf414c | 4879 | } |
43f6dfd3 RS |
4880 | ret.original_code = ERROR_MARK; |
4881 | return ret; | |
27bf414c JM |
4882 | case CPP_KEYWORD: |
4883 | switch (c_parser_peek_token (parser)->keyword) | |
4884 | { | |
4885 | case RID_SIZEOF: | |
4886 | return c_parser_sizeof_expression (parser); | |
4887 | case RID_ALIGNOF: | |
4888 | return c_parser_alignof_expression (parser); | |
4889 | case RID_EXTENSION: | |
4890 | c_parser_consume_token (parser); | |
4891 | ext = disable_extension_diagnostics (); | |
4892 | ret = c_parser_cast_expression (parser, NULL); | |
4893 | restore_extension_diagnostics (ext); | |
4894 | return ret; | |
4895 | case RID_REALPART: | |
4896 | c_parser_consume_token (parser); | |
46bdb9cf | 4897 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4898 | op = default_function_array_conversion (op); |
6a3799eb | 4899 | return parser_build_unary_op (REALPART_EXPR, op, loc); |
27bf414c JM |
4900 | case RID_IMAGPART: |
4901 | c_parser_consume_token (parser); | |
46bdb9cf | 4902 | op = c_parser_cast_expression (parser, NULL); |
f2a71bbc | 4903 | op = default_function_array_conversion (op); |
6a3799eb | 4904 | return parser_build_unary_op (IMAGPART_EXPR, op, loc); |
27bf414c JM |
4905 | default: |
4906 | return c_parser_postfix_expression (parser); | |
4907 | } | |
4908 | default: | |
4909 | return c_parser_postfix_expression (parser); | |
4910 | } | |
4911 | } | |
4912 | ||
4913 | /* Parse a sizeof expression. */ | |
4914 | ||
4915 | static struct c_expr | |
4916 | c_parser_sizeof_expression (c_parser *parser) | |
4917 | { | |
4918 | struct c_expr expr; | |
c7412148 | 4919 | location_t expr_loc; |
27bf414c JM |
4920 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF)); |
4921 | c_parser_consume_token (parser); | |
4922 | skip_evaluation++; | |
4923 | in_sizeof++; | |
4924 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
4925 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
4926 | { | |
4927 | /* Either sizeof ( type-name ) or sizeof unary-expression | |
4928 | starting with a compound literal. */ | |
4929 | struct c_type_name *type_name; | |
4930 | c_parser_consume_token (parser); | |
c7412148 | 4931 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4932 | type_name = c_parser_type_name (parser); |
4933 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4934 | if (type_name == NULL) | |
4935 | { | |
4936 | struct c_expr ret; | |
4937 | skip_evaluation--; | |
4938 | in_sizeof--; | |
4939 | ret.value = error_mark_node; | |
4940 | ret.original_code = ERROR_MARK; | |
4941 | return ret; | |
4942 | } | |
4943 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
4944 | { | |
4945 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
4946 | type_name); | |
4947 | goto sizeof_expr; | |
4948 | } | |
4949 | /* sizeof ( type-name ). */ | |
4950 | skip_evaluation--; | |
4951 | in_sizeof--; | |
52ffd86e MS |
4952 | if (type_name->declarator->kind == cdk_array |
4953 | && type_name->declarator->u.array.vla_unspec_p) | |
4954 | { | |
4955 | /* C99 6.7.5.2p4 */ | |
3ba09659 AH |
4956 | error_at (expr_loc, |
4957 | "%<[*]%> not allowed in other than a declaration"); | |
52ffd86e | 4958 | } |
27bf414c JM |
4959 | return c_expr_sizeof_type (type_name); |
4960 | } | |
4961 | else | |
4962 | { | |
c7412148 | 4963 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4964 | expr = c_parser_unary_expression (parser); |
4965 | sizeof_expr: | |
4966 | skip_evaluation--; | |
4967 | in_sizeof--; | |
4968 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
4969 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 4970 | error_at (expr_loc, "%<sizeof%> applied to a bit-field"); |
27bf414c JM |
4971 | return c_expr_sizeof_expr (expr); |
4972 | } | |
4973 | } | |
4974 | ||
4975 | /* Parse an alignof expression. */ | |
4976 | ||
4977 | static struct c_expr | |
4978 | c_parser_alignof_expression (c_parser *parser) | |
4979 | { | |
4980 | struct c_expr expr; | |
4981 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF)); | |
4982 | c_parser_consume_token (parser); | |
4983 | skip_evaluation++; | |
4984 | in_alignof++; | |
4985 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
4986 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
4987 | { | |
4988 | /* Either __alignof__ ( type-name ) or __alignof__ | |
4989 | unary-expression starting with a compound literal. */ | |
4990 | struct c_type_name *type_name; | |
4991 | struct c_expr ret; | |
4992 | c_parser_consume_token (parser); | |
4993 | type_name = c_parser_type_name (parser); | |
4994 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4995 | if (type_name == NULL) | |
4996 | { | |
4997 | struct c_expr ret; | |
4998 | skip_evaluation--; | |
4999 | in_alignof--; | |
5000 | ret.value = error_mark_node; | |
5001 | ret.original_code = ERROR_MARK; | |
5002 | return ret; | |
5003 | } | |
5004 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5005 | { | |
5006 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
5007 | type_name); | |
5008 | goto alignof_expr; | |
5009 | } | |
5010 | /* alignof ( type-name ). */ | |
5011 | skip_evaluation--; | |
5012 | in_alignof--; | |
5013 | ret.value = c_alignof (groktypename (type_name)); | |
5014 | ret.original_code = ERROR_MARK; | |
5015 | return ret; | |
5016 | } | |
5017 | else | |
5018 | { | |
5019 | struct c_expr ret; | |
5020 | expr = c_parser_unary_expression (parser); | |
5021 | alignof_expr: | |
5022 | skip_evaluation--; | |
5023 | in_alignof--; | |
5024 | ret.value = c_alignof_expr (expr.value); | |
5025 | ret.original_code = ERROR_MARK; | |
5026 | return ret; | |
5027 | } | |
5028 | } | |
5029 | ||
5030 | /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2). | |
5031 | ||
5032 | postfix-expression: | |
5033 | primary-expression | |
5034 | postfix-expression [ expression ] | |
5035 | postfix-expression ( argument-expression-list[opt] ) | |
5036 | postfix-expression . identifier | |
5037 | postfix-expression -> identifier | |
5038 | postfix-expression ++ | |
5039 | postfix-expression -- | |
5040 | ( type-name ) { initializer-list } | |
5041 | ( type-name ) { initializer-list , } | |
5042 | ||
5043 | argument-expression-list: | |
5044 | argument-expression | |
5045 | argument-expression-list , argument-expression | |
5046 | ||
5047 | primary-expression: | |
5048 | identifier | |
5049 | constant | |
5050 | string-literal | |
5051 | ( expression ) | |
5052 | ||
5053 | GNU extensions: | |
5054 | ||
5055 | primary-expression: | |
5056 | __func__ | |
5057 | (treated as a keyword in GNU C) | |
5058 | __FUNCTION__ | |
5059 | __PRETTY_FUNCTION__ | |
5060 | ( compound-statement ) | |
5061 | __builtin_va_arg ( assignment-expression , type-name ) | |
5062 | __builtin_offsetof ( type-name , offsetof-member-designator ) | |
5063 | __builtin_choose_expr ( assignment-expression , | |
5064 | assignment-expression , | |
5065 | assignment-expression ) | |
5066 | __builtin_types_compatible_p ( type-name , type-name ) | |
5067 | ||
5068 | offsetof-member-designator: | |
5069 | identifier | |
5070 | offsetof-member-designator . identifier | |
5071 | offsetof-member-designator [ expression ] | |
5072 | ||
5073 | Objective-C: | |
5074 | ||
5075 | primary-expression: | |
5076 | [ objc-receiver objc-message-args ] | |
5077 | @selector ( objc-selector-arg ) | |
5078 | @protocol ( identifier ) | |
5079 | @encode ( type-name ) | |
5080 | objc-string-literal | |
5081 | */ | |
5082 | ||
5083 | static struct c_expr | |
5084 | c_parser_postfix_expression (c_parser *parser) | |
5085 | { | |
5086 | struct c_expr expr, e1, e2, e3; | |
5087 | struct c_type_name *t1, *t2; | |
c7412148 | 5088 | location_t loc; |
27bf414c JM |
5089 | switch (c_parser_peek_token (parser)->type) |
5090 | { | |
5091 | case CPP_NUMBER: | |
5092 | case CPP_CHAR: | |
b6baa67d KVH |
5093 | case CPP_CHAR16: |
5094 | case CPP_CHAR32: | |
27bf414c JM |
5095 | case CPP_WCHAR: |
5096 | expr.value = c_parser_peek_token (parser)->value; | |
5097 | expr.original_code = ERROR_MARK; | |
5098 | c_parser_consume_token (parser); | |
5099 | break; | |
5100 | case CPP_STRING: | |
b6baa67d KVH |
5101 | case CPP_STRING16: |
5102 | case CPP_STRING32: | |
27bf414c JM |
5103 | case CPP_WSTRING: |
5104 | expr.value = c_parser_peek_token (parser)->value; | |
5105 | expr.original_code = STRING_CST; | |
5106 | c_parser_consume_token (parser); | |
5107 | break; | |
5108 | case CPP_OBJC_STRING: | |
5109 | gcc_assert (c_dialect_objc ()); | |
5110 | expr.value | |
5111 | = objc_build_string_object (c_parser_peek_token (parser)->value); | |
5112 | expr.original_code = ERROR_MARK; | |
5113 | c_parser_consume_token (parser); | |
5114 | break; | |
5115 | case CPP_NAME: | |
5116 | if (c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
5117 | { | |
5118 | c_parser_error (parser, "expected expression"); | |
5119 | expr.value = error_mark_node; | |
5120 | expr.original_code = ERROR_MARK; | |
5121 | break; | |
5122 | } | |
5123 | { | |
5124 | tree id = c_parser_peek_token (parser)->value; | |
766beb40 | 5125 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5126 | c_parser_consume_token (parser); |
5127 | expr.value = build_external_ref (id, | |
5128 | (c_parser_peek_token (parser)->type | |
766beb40 | 5129 | == CPP_OPEN_PAREN), loc); |
27bf414c JM |
5130 | expr.original_code = ERROR_MARK; |
5131 | } | |
5132 | break; | |
5133 | case CPP_OPEN_PAREN: | |
5134 | /* A parenthesized expression, statement expression or compound | |
5135 | literal. */ | |
5136 | if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE) | |
5137 | { | |
5138 | /* A statement expression. */ | |
5139 | tree stmt; | |
c7412148 | 5140 | location_t here = c_parser_peek_token (parser)->location; |
27bf414c JM |
5141 | c_parser_consume_token (parser); |
5142 | c_parser_consume_token (parser); | |
5143 | if (cur_stmt_list == NULL) | |
5144 | { | |
3ba09659 AH |
5145 | error_at (here, "braced-group within expression allowed " |
5146 | "only inside a function"); | |
27bf414c JM |
5147 | parser->error = true; |
5148 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
5149 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5150 | expr.value = error_mark_node; | |
5151 | expr.original_code = ERROR_MARK; | |
5152 | break; | |
5153 | } | |
5154 | stmt = c_begin_stmt_expr (); | |
5155 | c_parser_compound_statement_nostart (parser); | |
5156 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5157 | "expected %<)%>"); | |
509c9d60 MLI |
5158 | pedwarn (here, OPT_pedantic, |
5159 | "ISO C forbids braced-groups within expressions"); | |
27bf414c JM |
5160 | expr.value = c_finish_stmt_expr (stmt); |
5161 | expr.original_code = ERROR_MARK; | |
5162 | } | |
5163 | else if (c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5164 | { | |
5165 | /* A compound literal. ??? Can we actually get here rather | |
5166 | than going directly to | |
5167 | c_parser_postfix_expression_after_paren_type from | |
5168 | elsewhere? */ | |
5169 | struct c_type_name *type_name; | |
5170 | c_parser_consume_token (parser); | |
5171 | type_name = c_parser_type_name (parser); | |
5172 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5173 | "expected %<)%>"); | |
5174 | if (type_name == NULL) | |
5175 | { | |
5176 | expr.value = error_mark_node; | |
5177 | expr.original_code = ERROR_MARK; | |
5178 | } | |
5179 | else | |
5180 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
5181 | type_name); | |
5182 | } | |
5183 | else | |
5184 | { | |
5185 | /* A parenthesized expression. */ | |
5186 | c_parser_consume_token (parser); | |
5187 | expr = c_parser_expression (parser); | |
5188 | if (TREE_CODE (expr.value) == MODIFY_EXPR) | |
5189 | TREE_NO_WARNING (expr.value) = 1; | |
5190 | expr.original_code = ERROR_MARK; | |
5191 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5192 | "expected %<)%>"); | |
5193 | } | |
5194 | break; | |
5195 | case CPP_KEYWORD: | |
5196 | switch (c_parser_peek_token (parser)->keyword) | |
5197 | { | |
5198 | case RID_FUNCTION_NAME: | |
5199 | case RID_PRETTY_FUNCTION_NAME: | |
5200 | case RID_C99_FUNCTION_NAME: | |
3ba09659 AH |
5201 | expr.value = fname_decl (c_parser_peek_token (parser)->location, |
5202 | c_parser_peek_token (parser)->keyword, | |
27bf414c JM |
5203 | c_parser_peek_token (parser)->value); |
5204 | expr.original_code = ERROR_MARK; | |
5205 | c_parser_consume_token (parser); | |
5206 | break; | |
5207 | case RID_VA_ARG: | |
5208 | c_parser_consume_token (parser); | |
5209 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5210 | { | |
5211 | expr.value = error_mark_node; | |
5212 | expr.original_code = ERROR_MARK; | |
5213 | break; | |
5214 | } | |
5215 | e1 = c_parser_expr_no_commas (parser, NULL); | |
5216 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5217 | { | |
5218 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5219 | expr.value = error_mark_node; | |
5220 | expr.original_code = ERROR_MARK; | |
5221 | break; | |
5222 | } | |
5223 | t1 = c_parser_type_name (parser); | |
5224 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5225 | "expected %<)%>"); | |
5226 | if (t1 == NULL) | |
5227 | { | |
5228 | expr.value = error_mark_node; | |
5229 | expr.original_code = ERROR_MARK; | |
5230 | } | |
5231 | else | |
5232 | { | |
5233 | expr.value = build_va_arg (e1.value, groktypename (t1)); | |
5234 | expr.original_code = ERROR_MARK; | |
5235 | } | |
5236 | break; | |
5237 | case RID_OFFSETOF: | |
5238 | c_parser_consume_token (parser); | |
5239 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5240 | { | |
5241 | expr.value = error_mark_node; | |
5242 | expr.original_code = ERROR_MARK; | |
5243 | break; | |
5244 | } | |
5245 | t1 = c_parser_type_name (parser); | |
5246 | if (t1 == NULL) | |
5247 | { | |
5248 | expr.value = error_mark_node; | |
5249 | expr.original_code = ERROR_MARK; | |
5250 | break; | |
5251 | } | |
5252 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5253 | { | |
5254 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5255 | expr.value = error_mark_node; | |
5256 | expr.original_code = ERROR_MARK; | |
5257 | break; | |
5258 | } | |
5259 | { | |
5260 | tree type = groktypename (t1); | |
5261 | tree offsetof_ref; | |
5262 | if (type == error_mark_node) | |
5263 | offsetof_ref = error_mark_node; | |
5264 | else | |
6d4d7b0e | 5265 | offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node); |
27bf414c JM |
5266 | /* Parse the second argument to __builtin_offsetof. We |
5267 | must have one identifier, and beyond that we want to | |
5268 | accept sub structure and sub array references. */ | |
5269 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5270 | { | |
5271 | offsetof_ref = build_component_ref | |
5272 | (offsetof_ref, c_parser_peek_token (parser)->value); | |
5273 | c_parser_consume_token (parser); | |
5274 | while (c_parser_next_token_is (parser, CPP_DOT) | |
5275 | || c_parser_next_token_is (parser, | |
5276 | CPP_OPEN_SQUARE)) | |
5277 | { | |
5278 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
5279 | { | |
5280 | c_parser_consume_token (parser); | |
5281 | if (c_parser_next_token_is_not (parser, | |
5282 | CPP_NAME)) | |
5283 | { | |
5284 | c_parser_error (parser, "expected identifier"); | |
5285 | break; | |
5286 | } | |
5287 | offsetof_ref = build_component_ref | |
5288 | (offsetof_ref, | |
5289 | c_parser_peek_token (parser)->value); | |
5290 | c_parser_consume_token (parser); | |
5291 | } | |
5292 | else | |
5293 | { | |
5294 | tree idx; | |
6a3799eb | 5295 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5296 | c_parser_consume_token (parser); |
5297 | idx = c_parser_expression (parser).value; | |
5298 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5299 | "expected %<]%>"); | |
6a3799eb | 5300 | offsetof_ref = build_array_ref (offsetof_ref, idx, loc); |
27bf414c JM |
5301 | } |
5302 | } | |
5303 | } | |
5304 | else | |
5305 | c_parser_error (parser, "expected identifier"); | |
5306 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5307 | "expected %<)%>"); | |
6d4d7b0e | 5308 | expr.value = fold_offsetof (offsetof_ref, NULL_TREE); |
27bf414c JM |
5309 | expr.original_code = ERROR_MARK; |
5310 | } | |
5311 | break; | |
5312 | case RID_CHOOSE_EXPR: | |
5313 | c_parser_consume_token (parser); | |
5314 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5315 | { | |
5316 | expr.value = error_mark_node; | |
5317 | expr.original_code = ERROR_MARK; | |
5318 | break; | |
5319 | } | |
c7412148 | 5320 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5321 | e1 = c_parser_expr_no_commas (parser, NULL); |
5322 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5323 | { | |
5324 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5325 | expr.value = error_mark_node; | |
5326 | expr.original_code = ERROR_MARK; | |
5327 | break; | |
5328 | } | |
5329 | e2 = c_parser_expr_no_commas (parser, NULL); | |
5330 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5331 | { | |
5332 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5333 | expr.value = error_mark_node; | |
5334 | expr.original_code = ERROR_MARK; | |
5335 | break; | |
5336 | } | |
5337 | e3 = c_parser_expr_no_commas (parser, NULL); | |
5338 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5339 | "expected %<)%>"); | |
5340 | { | |
5341 | tree c; | |
5342 | ||
5343 | c = fold (e1.value); | |
27bf414c | 5344 | if (TREE_CODE (c) != INTEGER_CST) |
3ba09659 AH |
5345 | error_at (loc, |
5346 | "first argument to %<__builtin_choose_expr%> not" | |
5347 | " a constant"); | |
27bf414c JM |
5348 | expr = integer_zerop (c) ? e3 : e2; |
5349 | } | |
5350 | break; | |
5351 | case RID_TYPES_COMPATIBLE_P: | |
5352 | c_parser_consume_token (parser); | |
5353 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5354 | { | |
5355 | expr.value = error_mark_node; | |
5356 | expr.original_code = ERROR_MARK; | |
5357 | break; | |
5358 | } | |
5359 | t1 = c_parser_type_name (parser); | |
5360 | if (t1 == NULL) | |
5361 | { | |
5362 | expr.value = error_mark_node; | |
5363 | expr.original_code = ERROR_MARK; | |
5364 | break; | |
5365 | } | |
5366 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
5367 | { | |
5368 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5369 | expr.value = error_mark_node; | |
5370 | expr.original_code = ERROR_MARK; | |
5371 | break; | |
5372 | } | |
5373 | t2 = c_parser_type_name (parser); | |
5374 | if (t2 == NULL) | |
5375 | { | |
5376 | expr.value = error_mark_node; | |
5377 | expr.original_code = ERROR_MARK; | |
5378 | break; | |
5379 | } | |
5380 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5381 | "expected %<)%>"); | |
5382 | { | |
5383 | tree e1, e2; | |
5384 | ||
5385 | e1 = TYPE_MAIN_VARIANT (groktypename (t1)); | |
5386 | e2 = TYPE_MAIN_VARIANT (groktypename (t2)); | |
5387 | ||
5388 | expr.value = comptypes (e1, e2) | |
5389 | ? build_int_cst (NULL_TREE, 1) | |
5390 | : build_int_cst (NULL_TREE, 0); | |
5391 | expr.original_code = ERROR_MARK; | |
5392 | } | |
5393 | break; | |
5394 | case RID_AT_SELECTOR: | |
5395 | gcc_assert (c_dialect_objc ()); | |
5396 | c_parser_consume_token (parser); | |
5397 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5398 | { | |
5399 | expr.value = error_mark_node; | |
5400 | expr.original_code = ERROR_MARK; | |
5401 | break; | |
5402 | } | |
5403 | { | |
5404 | tree sel = c_parser_objc_selector_arg (parser); | |
5405 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5406 | "expected %<)%>"); | |
5407 | expr.value = objc_build_selector_expr (sel); | |
5408 | expr.original_code = ERROR_MARK; | |
5409 | } | |
5410 | break; | |
5411 | case RID_AT_PROTOCOL: | |
5412 | gcc_assert (c_dialect_objc ()); | |
5413 | c_parser_consume_token (parser); | |
5414 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5415 | { | |
5416 | expr.value = error_mark_node; | |
5417 | expr.original_code = ERROR_MARK; | |
5418 | break; | |
5419 | } | |
5420 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5421 | { | |
5422 | c_parser_error (parser, "expected identifier"); | |
5423 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5424 | expr.value = error_mark_node; | |
5425 | expr.original_code = ERROR_MARK; | |
5426 | break; | |
5427 | } | |
5428 | { | |
5429 | tree id = c_parser_peek_token (parser)->value; | |
5430 | c_parser_consume_token (parser); | |
5431 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5432 | "expected %<)%>"); | |
5433 | expr.value = objc_build_protocol_expr (id); | |
5434 | expr.original_code = ERROR_MARK; | |
5435 | } | |
5436 | break; | |
5437 | case RID_AT_ENCODE: | |
5438 | /* Extension to support C-structures in the archiver. */ | |
5439 | gcc_assert (c_dialect_objc ()); | |
5440 | c_parser_consume_token (parser); | |
5441 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
5442 | { | |
5443 | expr.value = error_mark_node; | |
5444 | expr.original_code = ERROR_MARK; | |
5445 | break; | |
5446 | } | |
5447 | t1 = c_parser_type_name (parser); | |
5448 | if (t1 == NULL) | |
5449 | { | |
5450 | expr.value = error_mark_node; | |
5451 | expr.original_code = ERROR_MARK; | |
5452 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5453 | break; | |
5454 | } | |
5455 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
5456 | "expected %<)%>"); | |
5457 | { | |
5458 | tree type = groktypename (t1); | |
5459 | expr.value = objc_build_encode_expr (type); | |
5460 | expr.original_code = ERROR_MARK; | |
5461 | } | |
5462 | break; | |
5463 | default: | |
5464 | c_parser_error (parser, "expected expression"); | |
5465 | expr.value = error_mark_node; | |
5466 | expr.original_code = ERROR_MARK; | |
5467 | break; | |
5468 | } | |
5469 | break; | |
5470 | case CPP_OPEN_SQUARE: | |
5471 | if (c_dialect_objc ()) | |
5472 | { | |
5473 | tree receiver, args; | |
5474 | c_parser_consume_token (parser); | |
5475 | receiver = c_parser_objc_receiver (parser); | |
5476 | args = c_parser_objc_message_args (parser); | |
5477 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5478 | "expected %<]%>"); | |
5479 | expr.value = objc_build_message_expr (build_tree_list (receiver, | |
5480 | args)); | |
5481 | expr.original_code = ERROR_MARK; | |
5482 | break; | |
5483 | } | |
5484 | /* Else fall through to report error. */ | |
5485 | default: | |
5486 | c_parser_error (parser, "expected expression"); | |
5487 | expr.value = error_mark_node; | |
5488 | expr.original_code = ERROR_MARK; | |
5489 | break; | |
5490 | } | |
5491 | return c_parser_postfix_expression_after_primary (parser, expr); | |
5492 | } | |
5493 | ||
5494 | /* Parse a postfix expression after a parenthesized type name: the | |
5495 | brace-enclosed initializer of a compound literal, possibly followed | |
5496 | by some postfix operators. This is separate because it is not | |
5497 | possible to tell until after the type name whether a cast | |
5498 | expression has a cast or a compound literal, or whether the operand | |
5499 | of sizeof is a parenthesized type name or starts with a compound | |
5500 | literal. */ | |
5501 | ||
5502 | static struct c_expr | |
5503 | c_parser_postfix_expression_after_paren_type (c_parser *parser, | |
5504 | struct c_type_name *type_name) | |
5505 | { | |
5506 | tree type; | |
5507 | struct c_expr init; | |
5508 | struct c_expr expr; | |
c7412148 | 5509 | location_t start_loc; |
27bf414c JM |
5510 | start_init (NULL_TREE, NULL, 0); |
5511 | type = groktypename (type_name); | |
c7412148 | 5512 | start_loc = c_parser_peek_token (parser)->location; |
85cad37c | 5513 | if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type)) |
27bf414c | 5514 | { |
3ba09659 | 5515 | error_at (start_loc, "compound literal has variable size"); |
27bf414c JM |
5516 | type = error_mark_node; |
5517 | } | |
5518 | init = c_parser_braced_init (parser, type, false); | |
5519 | finish_init (); | |
5520 | maybe_warn_string_init (type, init); | |
5521 | ||
fcf73884 | 5522 | if (!flag_isoc99) |
509c9d60 | 5523 | pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals"); |
27bf414c JM |
5524 | expr.value = build_compound_literal (type, init.value); |
5525 | expr.original_code = ERROR_MARK; | |
5526 | return c_parser_postfix_expression_after_primary (parser, expr); | |
5527 | } | |
5528 | ||
5529 | /* Parse a postfix expression after the initial primary or compound | |
5530 | literal; that is, parse a series of postfix operators. */ | |
5531 | ||
5532 | static struct c_expr | |
5533 | c_parser_postfix_expression_after_primary (c_parser *parser, | |
5534 | struct c_expr expr) | |
5535 | { | |
5536 | tree ident, idx, exprlist; | |
6a3799eb | 5537 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5538 | while (true) |
5539 | { | |
5540 | switch (c_parser_peek_token (parser)->type) | |
5541 | { | |
5542 | case CPP_OPEN_SQUARE: | |
5543 | /* Array reference. */ | |
6a3799eb | 5544 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5545 | c_parser_consume_token (parser); |
5546 | idx = c_parser_expression (parser).value; | |
5547 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5548 | "expected %<]%>"); | |
6a3799eb | 5549 | expr.value = build_array_ref (expr.value, idx, loc); |
27bf414c JM |
5550 | expr.original_code = ERROR_MARK; |
5551 | break; | |
5552 | case CPP_OPEN_PAREN: | |
5553 | /* Function call. */ | |
5554 | c_parser_consume_token (parser); | |
5555 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
5556 | exprlist = NULL_TREE; | |
5557 | else | |
46bdb9cf | 5558 | exprlist = c_parser_expr_list (parser, true); |
27bf414c JM |
5559 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
5560 | "expected %<)%>"); | |
5561 | expr.value = build_function_call (expr.value, exprlist); | |
5562 | expr.original_code = ERROR_MARK; | |
1ebc7e68 RA |
5563 | if (warn_disallowed_functions) |
5564 | warn_if_disallowed_function_p (expr.value); | |
27bf414c JM |
5565 | break; |
5566 | case CPP_DOT: | |
5567 | /* Structure element reference. */ | |
5568 | c_parser_consume_token (parser); | |
f2a71bbc | 5569 | expr = default_function_array_conversion (expr); |
27bf414c JM |
5570 | if (c_parser_next_token_is (parser, CPP_NAME)) |
5571 | ident = c_parser_peek_token (parser)->value; | |
5572 | else | |
5573 | { | |
5574 | c_parser_error (parser, "expected identifier"); | |
5575 | expr.value = error_mark_node; | |
5576 | expr.original_code = ERROR_MARK; | |
5577 | return expr; | |
5578 | } | |
5579 | c_parser_consume_token (parser); | |
5580 | expr.value = build_component_ref (expr.value, ident); | |
5581 | expr.original_code = ERROR_MARK; | |
5582 | break; | |
5583 | case CPP_DEREF: | |
5584 | /* Structure element reference. */ | |
5585 | c_parser_consume_token (parser); | |
f2a71bbc | 5586 | expr = default_function_array_conversion (expr); |
27bf414c JM |
5587 | if (c_parser_next_token_is (parser, CPP_NAME)) |
5588 | ident = c_parser_peek_token (parser)->value; | |
5589 | else | |
5590 | { | |
5591 | c_parser_error (parser, "expected identifier"); | |
5592 | expr.value = error_mark_node; | |
5593 | expr.original_code = ERROR_MARK; | |
5594 | return expr; | |
5595 | } | |
5596 | c_parser_consume_token (parser); | |
c9f9eb5d AH |
5597 | expr.value = build_component_ref (build_indirect_ref (loc, |
5598 | expr.value, | |
5599 | "->"), | |
6a3799eb | 5600 | ident); |
27bf414c JM |
5601 | expr.original_code = ERROR_MARK; |
5602 | break; | |
5603 | case CPP_PLUS_PLUS: | |
5604 | /* Postincrement. */ | |
5605 | c_parser_consume_token (parser); | |
f2a71bbc | 5606 | expr = default_function_array_conversion (expr); |
c9f9eb5d AH |
5607 | expr.value = build_unary_op (loc, |
5608 | POSTINCREMENT_EXPR, expr.value, 0); | |
27bf414c JM |
5609 | expr.original_code = ERROR_MARK; |
5610 | break; | |
5611 | case CPP_MINUS_MINUS: | |
5612 | /* Postdecrement. */ | |
5613 | c_parser_consume_token (parser); | |
f2a71bbc | 5614 | expr = default_function_array_conversion (expr); |
c9f9eb5d AH |
5615 | expr.value = build_unary_op (loc, |
5616 | POSTDECREMENT_EXPR, expr.value, 0); | |
27bf414c JM |
5617 | expr.original_code = ERROR_MARK; |
5618 | break; | |
5619 | default: | |
5620 | return expr; | |
5621 | } | |
5622 | } | |
5623 | } | |
5624 | ||
5625 | /* Parse an expression (C90 6.3.17, C99 6.5.17). | |
5626 | ||
5627 | expression: | |
5628 | assignment-expression | |
5629 | expression , assignment-expression | |
5630 | */ | |
5631 | ||
5632 | static struct c_expr | |
5633 | c_parser_expression (c_parser *parser) | |
5634 | { | |
5635 | struct c_expr expr; | |
5636 | expr = c_parser_expr_no_commas (parser, NULL); | |
5637 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
5638 | { | |
5639 | struct c_expr next; | |
5640 | c_parser_consume_token (parser); | |
5641 | next = c_parser_expr_no_commas (parser, NULL); | |
f2a71bbc | 5642 | next = default_function_array_conversion (next); |
27bf414c JM |
5643 | expr.value = build_compound_expr (expr.value, next.value); |
5644 | expr.original_code = COMPOUND_EXPR; | |
5645 | } | |
5646 | return expr; | |
5647 | } | |
5648 | ||
46bdb9cf JM |
5649 | /* Parse an expression and convert functions or arrays to |
5650 | pointers. */ | |
5651 | ||
5652 | static struct c_expr | |
5653 | c_parser_expression_conv (c_parser *parser) | |
5654 | { | |
5655 | struct c_expr expr; | |
5656 | expr = c_parser_expression (parser); | |
f2a71bbc | 5657 | expr = default_function_array_conversion (expr); |
46bdb9cf JM |
5658 | return expr; |
5659 | } | |
5660 | ||
5661 | /* Parse a non-empty list of expressions. If CONVERT_P, convert | |
5662 | functions and arrays to pointers. | |
27bf414c JM |
5663 | |
5664 | nonempty-expr-list: | |
5665 | assignment-expression | |
5666 | nonempty-expr-list , assignment-expression | |
5667 | */ | |
5668 | ||
5669 | static tree | |
46bdb9cf | 5670 | c_parser_expr_list (c_parser *parser, bool convert_p) |
27bf414c JM |
5671 | { |
5672 | struct c_expr expr; | |
7fa3585c | 5673 | tree ret, cur; |
27bf414c | 5674 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 5675 | if (convert_p) |
f2a71bbc | 5676 | expr = default_function_array_conversion (expr); |
7fa3585c | 5677 | ret = cur = build_tree_list (NULL_TREE, expr.value); |
27bf414c JM |
5678 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
5679 | { | |
5680 | c_parser_consume_token (parser); | |
5681 | expr = c_parser_expr_no_commas (parser, NULL); | |
46bdb9cf | 5682 | if (convert_p) |
f2a71bbc | 5683 | expr = default_function_array_conversion (expr); |
7fa3585c | 5684 | cur = TREE_CHAIN (cur) = build_tree_list (NULL_TREE, expr.value); |
27bf414c JM |
5685 | } |
5686 | return ret; | |
5687 | } | |
5688 | ||
5689 | \f | |
5690 | /* Parse Objective-C-specific constructs. */ | |
5691 | ||
5692 | /* Parse an objc-class-definition. | |
5693 | ||
5694 | objc-class-definition: | |
5695 | @interface identifier objc-superclass[opt] objc-protocol-refs[opt] | |
5696 | objc-class-instance-variables[opt] objc-methodprotolist @end | |
5697 | @implementation identifier objc-superclass[opt] | |
5698 | objc-class-instance-variables[opt] | |
5699 | @interface identifier ( identifier ) objc-protocol-refs[opt] | |
5700 | objc-methodprotolist @end | |
5701 | @implementation identifier ( identifier ) | |
5702 | ||
5703 | objc-superclass: | |
5704 | : identifier | |
5705 | ||
5706 | "@interface identifier (" must start "@interface identifier ( | |
5707 | identifier ) ...": objc-methodprotolist in the first production may | |
0fa2e4df | 5708 | not start with a parenthesized identifier as a declarator of a data |
27bf414c JM |
5709 | definition with no declaration specifiers if the objc-superclass, |
5710 | objc-protocol-refs and objc-class-instance-variables are omitted. */ | |
5711 | ||
5712 | static void | |
5713 | c_parser_objc_class_definition (c_parser *parser) | |
5714 | { | |
5715 | bool iface_p; | |
5716 | tree id1; | |
5717 | tree superclass; | |
5718 | if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE)) | |
5719 | iface_p = true; | |
5720 | else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION)) | |
5721 | iface_p = false; | |
5722 | else | |
5723 | gcc_unreachable (); | |
5724 | c_parser_consume_token (parser); | |
5725 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5726 | { | |
5727 | c_parser_error (parser, "expected identifier"); | |
5728 | return; | |
5729 | } | |
5730 | id1 = c_parser_peek_token (parser)->value; | |
5731 | c_parser_consume_token (parser); | |
5732 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
5733 | { | |
5734 | tree id2; | |
5735 | tree proto = NULL_TREE; | |
5736 | c_parser_consume_token (parser); | |
5737 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5738 | { | |
5739 | c_parser_error (parser, "expected identifier"); | |
5740 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5741 | return; | |
5742 | } | |
5743 | id2 = c_parser_peek_token (parser)->value; | |
5744 | c_parser_consume_token (parser); | |
5745 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5746 | if (!iface_p) | |
5747 | { | |
5748 | objc_start_category_implementation (id1, id2); | |
5749 | return; | |
5750 | } | |
5751 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
5752 | proto = c_parser_objc_protocol_refs (parser); | |
5753 | objc_start_category_interface (id1, id2, proto); | |
5754 | c_parser_objc_methodprotolist (parser); | |
5755 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
5756 | objc_finish_interface (); | |
5757 | return; | |
5758 | } | |
5759 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
5760 | { | |
5761 | c_parser_consume_token (parser); | |
5762 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5763 | { | |
5764 | c_parser_error (parser, "expected identifier"); | |
5765 | return; | |
5766 | } | |
5767 | superclass = c_parser_peek_token (parser)->value; | |
5768 | c_parser_consume_token (parser); | |
5769 | } | |
5770 | else | |
5771 | superclass = NULL_TREE; | |
5772 | if (iface_p) | |
5773 | { | |
5774 | tree proto = NULL_TREE; | |
5775 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
5776 | proto = c_parser_objc_protocol_refs (parser); | |
5777 | objc_start_class_interface (id1, superclass, proto); | |
5778 | } | |
5779 | else | |
5780 | objc_start_class_implementation (id1, superclass); | |
5781 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5782 | c_parser_objc_class_instance_variables (parser); | |
5783 | if (iface_p) | |
5784 | { | |
5785 | objc_continue_interface (); | |
5786 | c_parser_objc_methodprotolist (parser); | |
5787 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
5788 | objc_finish_interface (); | |
5789 | } | |
5790 | else | |
5791 | { | |
5792 | objc_continue_implementation (); | |
5793 | return; | |
5794 | } | |
5795 | } | |
5796 | ||
5797 | /* Parse objc-class-instance-variables. | |
5798 | ||
5799 | objc-class-instance-variables: | |
5800 | { objc-instance-variable-decl-list[opt] } | |
5801 | ||
5802 | objc-instance-variable-decl-list: | |
5803 | objc-visibility-spec | |
5804 | objc-instance-variable-decl ; | |
5805 | ; | |
5806 | objc-instance-variable-decl-list objc-visibility-spec | |
5807 | objc-instance-variable-decl-list objc-instance-variable-decl ; | |
5808 | objc-instance-variable-decl-list ; | |
5809 | ||
5810 | objc-visibility-spec: | |
5811 | @private | |
5812 | @protected | |
5813 | @public | |
5814 | ||
5815 | objc-instance-variable-decl: | |
5816 | struct-declaration | |
5817 | */ | |
5818 | ||
5819 | static void | |
5820 | c_parser_objc_class_instance_variables (c_parser *parser) | |
5821 | { | |
5822 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); | |
5823 | c_parser_consume_token (parser); | |
5824 | while (c_parser_next_token_is_not (parser, CPP_EOF)) | |
5825 | { | |
5826 | tree decls; | |
5827 | /* Parse any stray semicolon. */ | |
5828 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
5829 | { | |
509c9d60 MLI |
5830 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
5831 | "extra semicolon in struct or union specified"); | |
27bf414c JM |
5832 | c_parser_consume_token (parser); |
5833 | continue; | |
5834 | } | |
5835 | /* Stop if at the end of the instance variables. */ | |
5836 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
5837 | { | |
5838 | c_parser_consume_token (parser); | |
5839 | break; | |
5840 | } | |
5841 | /* Parse any objc-visibility-spec. */ | |
eea1139b | 5842 | if (c_parser_next_token_is_keyword (parser, RID_PRIVATE)) |
27bf414c JM |
5843 | { |
5844 | c_parser_consume_token (parser); | |
5845 | objc_set_visibility (2); | |
5846 | continue; | |
5847 | } | |
eea1139b | 5848 | else if (c_parser_next_token_is_keyword (parser, RID_PROTECTED)) |
27bf414c JM |
5849 | { |
5850 | c_parser_consume_token (parser); | |
5851 | objc_set_visibility (0); | |
5852 | continue; | |
5853 | } | |
eea1139b | 5854 | else if (c_parser_next_token_is_keyword (parser, RID_PUBLIC)) |
27bf414c JM |
5855 | { |
5856 | c_parser_consume_token (parser); | |
5857 | objc_set_visibility (1); | |
5858 | continue; | |
5859 | } | |
bc4071dd RH |
5860 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
5861 | { | |
5862 | c_parser_pragma (parser, pragma_external); | |
5863 | continue; | |
5864 | } | |
5865 | ||
27bf414c JM |
5866 | /* Parse some comma-separated declarations. */ |
5867 | decls = c_parser_struct_declaration (parser); | |
5868 | { | |
5869 | /* Comma-separated instance variables are chained together in | |
5870 | reverse order; add them one by one. */ | |
5871 | tree ivar = nreverse (decls); | |
5872 | for (; ivar; ivar = TREE_CHAIN (ivar)) | |
5873 | objc_add_instance_variable (copy_node (ivar)); | |
5874 | } | |
5875 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
5876 | } | |
5877 | } | |
5878 | ||
5879 | /* Parse an objc-class-declaration. | |
5880 | ||
5881 | objc-class-declaration: | |
5882 | @class identifier-list ; | |
5883 | */ | |
5884 | ||
5885 | static void | |
5886 | c_parser_objc_class_declaration (c_parser *parser) | |
5887 | { | |
5888 | tree list = NULL_TREE; | |
eea1139b | 5889 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_CLASS)); |
27bf414c JM |
5890 | c_parser_consume_token (parser); |
5891 | /* Any identifiers, including those declared as type names, are OK | |
5892 | here. */ | |
5893 | while (true) | |
5894 | { | |
5895 | tree id; | |
5896 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5897 | { | |
5898 | c_parser_error (parser, "expected identifier"); | |
5899 | break; | |
5900 | } | |
5901 | id = c_parser_peek_token (parser)->value; | |
5902 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
5903 | c_parser_consume_token (parser); | |
5904 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5905 | c_parser_consume_token (parser); | |
5906 | else | |
5907 | break; | |
5908 | } | |
5909 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
5910 | objc_declare_class (list); | |
5911 | } | |
5912 | ||
5913 | /* Parse an objc-alias-declaration. | |
5914 | ||
5915 | objc-alias-declaration: | |
5916 | @compatibility_alias identifier identifier ; | |
5917 | */ | |
5918 | ||
5919 | static void | |
5920 | c_parser_objc_alias_declaration (c_parser *parser) | |
5921 | { | |
5922 | tree id1, id2; | |
5923 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS)); | |
5924 | c_parser_consume_token (parser); | |
5925 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5926 | { | |
5927 | c_parser_error (parser, "expected identifier"); | |
5928 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
5929 | return; | |
5930 | } | |
5931 | id1 = c_parser_peek_token (parser)->value; | |
5932 | c_parser_consume_token (parser); | |
5933 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5934 | { | |
5935 | c_parser_error (parser, "expected identifier"); | |
5936 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
5937 | return; | |
5938 | } | |
5939 | id2 = c_parser_peek_token (parser)->value; | |
5940 | c_parser_consume_token (parser); | |
5941 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
5942 | objc_declare_alias (id1, id2); | |
5943 | } | |
5944 | ||
5945 | /* Parse an objc-protocol-definition. | |
5946 | ||
5947 | objc-protocol-definition: | |
5948 | @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end | |
5949 | @protocol identifier-list ; | |
5950 | ||
5951 | "@protocol identifier ;" should be resolved as "@protocol | |
5952 | identifier-list ;": objc-methodprotolist may not start with a | |
5953 | semicolon in the first alternative if objc-protocol-refs are | |
5954 | omitted. */ | |
5955 | ||
5956 | static void | |
5957 | c_parser_objc_protocol_definition (c_parser *parser) | |
5958 | { | |
5959 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL)); | |
5960 | c_parser_consume_token (parser); | |
5961 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5962 | { | |
5963 | c_parser_error (parser, "expected identifier"); | |
5964 | return; | |
5965 | } | |
5966 | if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA | |
5967 | || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON) | |
5968 | { | |
5969 | tree list = NULL_TREE; | |
5970 | /* Any identifiers, including those declared as type names, are | |
5971 | OK here. */ | |
5972 | while (true) | |
5973 | { | |
5974 | tree id; | |
5975 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
5976 | { | |
5977 | c_parser_error (parser, "expected identifier"); | |
5978 | break; | |
5979 | } | |
5980 | id = c_parser_peek_token (parser)->value; | |
5981 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
5982 | c_parser_consume_token (parser); | |
5983 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5984 | c_parser_consume_token (parser); | |
5985 | else | |
5986 | break; | |
5987 | } | |
5988 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
5989 | objc_declare_protocols (list); | |
5990 | } | |
5991 | else | |
5992 | { | |
5993 | tree id = c_parser_peek_token (parser)->value; | |
5994 | tree proto = NULL_TREE; | |
5995 | c_parser_consume_token (parser); | |
5996 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
5997 | proto = c_parser_objc_protocol_refs (parser); | |
0bacb8c7 | 5998 | parser->objc_pq_context = true; |
27bf414c JM |
5999 | objc_start_protocol (id, proto); |
6000 | c_parser_objc_methodprotolist (parser); | |
6001 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
0bacb8c7 | 6002 | parser->objc_pq_context = false; |
27bf414c JM |
6003 | objc_finish_interface (); |
6004 | } | |
6005 | } | |
6006 | ||
6007 | /* Parse an objc-method-type. | |
6008 | ||
6009 | objc-method-type: | |
6010 | + | |
6011 | - | |
6012 | */ | |
6013 | ||
6014 | static enum tree_code | |
6015 | c_parser_objc_method_type (c_parser *parser) | |
6016 | { | |
6017 | switch (c_parser_peek_token (parser)->type) | |
6018 | { | |
6019 | case CPP_PLUS: | |
6020 | c_parser_consume_token (parser); | |
6021 | return PLUS_EXPR; | |
6022 | case CPP_MINUS: | |
6023 | c_parser_consume_token (parser); | |
6024 | return MINUS_EXPR; | |
6025 | default: | |
6026 | gcc_unreachable (); | |
6027 | } | |
6028 | } | |
6029 | ||
6030 | /* Parse an objc-method-definition. | |
6031 | ||
6032 | objc-method-definition: | |
6033 | objc-method-type objc-method-decl ;[opt] compound-statement | |
6034 | */ | |
6035 | ||
6036 | static void | |
6037 | c_parser_objc_method_definition (c_parser *parser) | |
6038 | { | |
6039 | enum tree_code type = c_parser_objc_method_type (parser); | |
6040 | tree decl; | |
6041 | objc_set_method_type (type); | |
0bacb8c7 | 6042 | parser->objc_pq_context = true; |
27bf414c JM |
6043 | decl = c_parser_objc_method_decl (parser); |
6044 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
6045 | { | |
6046 | c_parser_consume_token (parser); | |
509c9d60 MLI |
6047 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
6048 | "extra semicolon in method definition specified"); | |
27bf414c | 6049 | } |
8f078c08 AP |
6050 | if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
6051 | { | |
6052 | c_parser_error (parser, "expected %<{%>"); | |
6053 | return; | |
6054 | } | |
0bacb8c7 | 6055 | parser->objc_pq_context = false; |
27bf414c JM |
6056 | objc_start_method_definition (decl); |
6057 | add_stmt (c_parser_compound_statement (parser)); | |
6058 | objc_finish_method_definition (current_function_decl); | |
6059 | } | |
6060 | ||
6061 | /* Parse an objc-methodprotolist. | |
6062 | ||
6063 | objc-methodprotolist: | |
6064 | empty | |
6065 | objc-methodprotolist objc-methodproto | |
6066 | objc-methodprotolist declaration | |
6067 | objc-methodprotolist ; | |
6068 | ||
6069 | The declaration is a data definition, which may be missing | |
6070 | declaration specifiers under the same rules and diagnostics as | |
6071 | other data definitions outside functions, and the stray semicolon | |
6072 | is diagnosed the same way as a stray semicolon outside a | |
6073 | function. */ | |
6074 | ||
6075 | static void | |
6076 | c_parser_objc_methodprotolist (c_parser *parser) | |
6077 | { | |
6078 | while (true) | |
6079 | { | |
6080 | /* The list is terminated by @end. */ | |
6081 | switch (c_parser_peek_token (parser)->type) | |
6082 | { | |
6083 | case CPP_SEMICOLON: | |
509c9d60 MLI |
6084 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
6085 | "ISO C does not allow extra %<;%> outside of a function"); | |
27bf414c JM |
6086 | c_parser_consume_token (parser); |
6087 | break; | |
6088 | case CPP_PLUS: | |
6089 | case CPP_MINUS: | |
6090 | c_parser_objc_methodproto (parser); | |
6091 | break; | |
b9b58168 RH |
6092 | case CPP_PRAGMA: |
6093 | c_parser_pragma (parser, pragma_external); | |
6094 | break; | |
27bf414c JM |
6095 | case CPP_EOF: |
6096 | return; | |
6097 | default: | |
6098 | if (c_parser_next_token_is_keyword (parser, RID_AT_END)) | |
6099 | return; | |
6100 | c_parser_declaration_or_fndef (parser, false, true, false, true); | |
6101 | break; | |
6102 | } | |
6103 | } | |
6104 | } | |
6105 | ||
6106 | /* Parse an objc-methodproto. | |
6107 | ||
6108 | objc-methodproto: | |
6109 | objc-method-type objc-method-decl ; | |
6110 | */ | |
6111 | ||
6112 | static void | |
6113 | c_parser_objc_methodproto (c_parser *parser) | |
6114 | { | |
6115 | enum tree_code type = c_parser_objc_method_type (parser); | |
6116 | tree decl; | |
6117 | objc_set_method_type (type); | |
6118 | /* Remember protocol qualifiers in prototypes. */ | |
0bacb8c7 | 6119 | parser->objc_pq_context = true; |
27bf414c JM |
6120 | decl = c_parser_objc_method_decl (parser); |
6121 | /* Forget protocol qualifiers here. */ | |
0bacb8c7 | 6122 | parser->objc_pq_context = false; |
27bf414c JM |
6123 | objc_add_method_declaration (decl); |
6124 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
6125 | } | |
6126 | ||
6127 | /* Parse an objc-method-decl. | |
6128 | ||
6129 | objc-method-decl: | |
6130 | ( objc-type-name ) objc-selector | |
6131 | objc-selector | |
6132 | ( objc-type-name ) objc-keyword-selector objc-optparmlist | |
6133 | objc-keyword-selector objc-optparmlist | |
6134 | ||
6135 | objc-keyword-selector: | |
6136 | objc-keyword-decl | |
6137 | objc-keyword-selector objc-keyword-decl | |
6138 | ||
6139 | objc-keyword-decl: | |
6140 | objc-selector : ( objc-type-name ) identifier | |
6141 | objc-selector : identifier | |
6142 | : ( objc-type-name ) identifier | |
6143 | : identifier | |
6144 | ||
6145 | objc-optparmlist: | |
6146 | objc-optparms objc-optellipsis | |
6147 | ||
6148 | objc-optparms: | |
6149 | empty | |
6150 | objc-opt-parms , parameter-declaration | |
6151 | ||
6152 | objc-optellipsis: | |
6153 | empty | |
6154 | , ... | |
6155 | */ | |
6156 | ||
6157 | static tree | |
6158 | c_parser_objc_method_decl (c_parser *parser) | |
6159 | { | |
6160 | tree type = NULL_TREE; | |
6161 | tree sel; | |
6162 | tree parms = NULL_TREE; | |
dbb74365 RS |
6163 | bool ellipsis = false; |
6164 | ||
27bf414c JM |
6165 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
6166 | { | |
6167 | c_parser_consume_token (parser); | |
6168 | type = c_parser_objc_type_name (parser); | |
6169 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6170 | } | |
6171 | sel = c_parser_objc_selector (parser); | |
6172 | /* If there is no selector, or a colon follows, we have an | |
6173 | objc-keyword-selector. If there is a selector, and a colon does | |
6174 | not follow, that selector ends the objc-method-decl. */ | |
6175 | if (!sel || c_parser_next_token_is (parser, CPP_COLON)) | |
6176 | { | |
6177 | tree tsel = sel; | |
6178 | tree list = NULL_TREE; | |
27bf414c JM |
6179 | while (true) |
6180 | { | |
6181 | tree atype = NULL_TREE, id, keyworddecl; | |
6182 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6183 | break; | |
6184 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6185 | { | |
6186 | c_parser_consume_token (parser); | |
6187 | atype = c_parser_objc_type_name (parser); | |
6188 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6189 | "expected %<)%>"); | |
6190 | } | |
6191 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6192 | { | |
6193 | c_parser_error (parser, "expected identifier"); | |
6194 | return error_mark_node; | |
6195 | } | |
6196 | id = c_parser_peek_token (parser)->value; | |
6197 | c_parser_consume_token (parser); | |
6198 | keyworddecl = objc_build_keyword_decl (tsel, atype, id); | |
6199 | list = chainon (list, keyworddecl); | |
6200 | tsel = c_parser_objc_selector (parser); | |
6201 | if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6202 | break; | |
6203 | } | |
6204 | /* Parse the optional parameter list. Optional Objective-C | |
6205 | method parameters follow the C syntax, and may include '...' | |
6206 | to denote a variable number of arguments. */ | |
6207 | parms = make_node (TREE_LIST); | |
27bf414c JM |
6208 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
6209 | { | |
6210 | struct c_parm *parm; | |
6211 | c_parser_consume_token (parser); | |
6212 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
6213 | { | |
6214 | ellipsis = true; | |
6215 | c_parser_consume_token (parser); | |
6216 | break; | |
6217 | } | |
6218 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6219 | if (parm == NULL) | |
6220 | break; | |
6221 | parms = chainon (parms, | |
6222 | build_tree_list (NULL_TREE, grokparm (parm))); | |
6223 | } | |
27bf414c JM |
6224 | sel = list; |
6225 | } | |
dbb74365 | 6226 | return objc_build_method_signature (type, sel, parms, ellipsis); |
27bf414c JM |
6227 | } |
6228 | ||
6229 | /* Parse an objc-type-name. | |
6230 | ||
6231 | objc-type-name: | |
6232 | objc-type-qualifiers[opt] type-name | |
6233 | objc-type-qualifiers[opt] | |
6234 | ||
6235 | objc-type-qualifiers: | |
6236 | objc-type-qualifier | |
6237 | objc-type-qualifiers objc-type-qualifier | |
6238 | ||
6239 | objc-type-qualifier: one of | |
6240 | in out inout bycopy byref oneway | |
6241 | */ | |
6242 | ||
6243 | static tree | |
6244 | c_parser_objc_type_name (c_parser *parser) | |
6245 | { | |
6246 | tree quals = NULL_TREE; | |
d75d71e0 | 6247 | struct c_type_name *type_name = NULL; |
27bf414c JM |
6248 | tree type = NULL_TREE; |
6249 | while (true) | |
6250 | { | |
6251 | c_token *token = c_parser_peek_token (parser); | |
6252 | if (token->type == CPP_KEYWORD | |
6253 | && (token->keyword == RID_IN | |
6254 | || token->keyword == RID_OUT | |
6255 | || token->keyword == RID_INOUT | |
6256 | || token->keyword == RID_BYCOPY | |
6257 | || token->keyword == RID_BYREF | |
6258 | || token->keyword == RID_ONEWAY)) | |
6259 | { | |
6260 | quals = chainon (quals, build_tree_list (NULL_TREE, token->value)); | |
6261 | c_parser_consume_token (parser); | |
6262 | } | |
6263 | else | |
6264 | break; | |
6265 | } | |
6266 | if (c_parser_next_token_starts_typename (parser)) | |
d75d71e0 ILT |
6267 | type_name = c_parser_type_name (parser); |
6268 | if (type_name) | |
6269 | type = groktypename (type_name); | |
27bf414c JM |
6270 | return build_tree_list (quals, type); |
6271 | } | |
6272 | ||
6273 | /* Parse objc-protocol-refs. | |
6274 | ||
6275 | objc-protocol-refs: | |
6276 | < identifier-list > | |
6277 | */ | |
6278 | ||
6279 | static tree | |
6280 | c_parser_objc_protocol_refs (c_parser *parser) | |
6281 | { | |
6282 | tree list = NULL_TREE; | |
6283 | gcc_assert (c_parser_next_token_is (parser, CPP_LESS)); | |
6284 | c_parser_consume_token (parser); | |
6285 | /* Any identifiers, including those declared as type names, are OK | |
6286 | here. */ | |
6287 | while (true) | |
6288 | { | |
6289 | tree id; | |
6290 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6291 | { | |
6292 | c_parser_error (parser, "expected identifier"); | |
6293 | break; | |
6294 | } | |
6295 | id = c_parser_peek_token (parser)->value; | |
6296 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
6297 | c_parser_consume_token (parser); | |
6298 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
6299 | c_parser_consume_token (parser); | |
6300 | else | |
6301 | break; | |
6302 | } | |
6303 | c_parser_require (parser, CPP_GREATER, "expected %<>%>"); | |
6304 | return list; | |
6305 | } | |
6306 | ||
6307 | /* Parse an objc-try-catch-statement. | |
6308 | ||
6309 | objc-try-catch-statement: | |
6310 | @try compound-statement objc-catch-list[opt] | |
6311 | @try compound-statement objc-catch-list[opt] @finally compound-statement | |
6312 | ||
6313 | objc-catch-list: | |
6314 | @catch ( parameter-declaration ) compound-statement | |
6315 | objc-catch-list @catch ( parameter-declaration ) compound-statement | |
6316 | */ | |
6317 | ||
6318 | static void | |
6319 | c_parser_objc_try_catch_statement (c_parser *parser) | |
6320 | { | |
6321 | location_t loc; | |
6322 | tree stmt; | |
eea1139b | 6323 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRY)); |
27bf414c JM |
6324 | c_parser_consume_token (parser); |
6325 | loc = c_parser_peek_token (parser)->location; | |
6326 | stmt = c_parser_compound_statement (parser); | |
6327 | objc_begin_try_stmt (loc, stmt); | |
eea1139b | 6328 | while (c_parser_next_token_is_keyword (parser, RID_CATCH)) |
27bf414c JM |
6329 | { |
6330 | struct c_parm *parm; | |
6331 | c_parser_consume_token (parser); | |
6332 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6333 | break; | |
6334 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
6335 | if (parm == NULL) | |
6336 | { | |
6337 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6338 | break; | |
6339 | } | |
6340 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6341 | objc_begin_catch_clause (grokparm (parm)); | |
6342 | if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) | |
6343 | c_parser_compound_statement_nostart (parser); | |
6344 | objc_finish_catch_clause (); | |
6345 | } | |
6346 | if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY)) | |
6347 | { | |
6348 | location_t finloc; | |
6349 | tree finstmt; | |
6350 | c_parser_consume_token (parser); | |
6351 | finloc = c_parser_peek_token (parser)->location; | |
6352 | finstmt = c_parser_compound_statement (parser); | |
6353 | objc_build_finally_clause (finloc, finstmt); | |
6354 | } | |
6355 | objc_finish_try_stmt (); | |
6356 | } | |
6357 | ||
6358 | /* Parse an objc-synchronized-statement. | |
6359 | ||
6360 | objc-synchronized-statement: | |
6361 | @synchronized ( expression ) compound-statement | |
6362 | */ | |
6363 | ||
6364 | static void | |
6365 | c_parser_objc_synchronized_statement (c_parser *parser) | |
6366 | { | |
6367 | location_t loc; | |
6368 | tree expr, stmt; | |
6369 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED)); | |
6370 | c_parser_consume_token (parser); | |
6371 | loc = c_parser_peek_token (parser)->location; | |
6372 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6373 | { | |
6374 | expr = c_parser_expression (parser).value; | |
6375 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6376 | } | |
6377 | else | |
6378 | expr = error_mark_node; | |
6379 | stmt = c_parser_compound_statement (parser); | |
6380 | objc_build_synchronized (loc, expr, stmt); | |
6381 | } | |
6382 | ||
6383 | /* Parse an objc-selector; return NULL_TREE without an error if the | |
6384 | next token is not an objc-selector. | |
6385 | ||
6386 | objc-selector: | |
6387 | identifier | |
6388 | one of | |
6389 | enum struct union if else while do for switch case default | |
6390 | break continue return goto asm sizeof typeof __alignof | |
6391 | unsigned long const short volatile signed restrict _Complex | |
6392 | in out inout bycopy byref oneway int char float double void _Bool | |
6393 | ||
6394 | ??? Why this selection of keywords but not, for example, storage | |
6395 | class specifiers? */ | |
6396 | ||
6397 | static tree | |
6398 | c_parser_objc_selector (c_parser *parser) | |
6399 | { | |
6400 | c_token *token = c_parser_peek_token (parser); | |
6401 | tree value = token->value; | |
6402 | if (token->type == CPP_NAME) | |
6403 | { | |
6404 | c_parser_consume_token (parser); | |
6405 | return value; | |
6406 | } | |
6407 | if (token->type != CPP_KEYWORD) | |
6408 | return NULL_TREE; | |
6409 | switch (token->keyword) | |
6410 | { | |
6411 | case RID_ENUM: | |
6412 | case RID_STRUCT: | |
6413 | case RID_UNION: | |
6414 | case RID_IF: | |
6415 | case RID_ELSE: | |
6416 | case RID_WHILE: | |
6417 | case RID_DO: | |
6418 | case RID_FOR: | |
6419 | case RID_SWITCH: | |
6420 | case RID_CASE: | |
6421 | case RID_DEFAULT: | |
6422 | case RID_BREAK: | |
6423 | case RID_CONTINUE: | |
6424 | case RID_RETURN: | |
6425 | case RID_GOTO: | |
6426 | case RID_ASM: | |
6427 | case RID_SIZEOF: | |
6428 | case RID_TYPEOF: | |
6429 | case RID_ALIGNOF: | |
6430 | case RID_UNSIGNED: | |
6431 | case RID_LONG: | |
6432 | case RID_CONST: | |
6433 | case RID_SHORT: | |
6434 | case RID_VOLATILE: | |
6435 | case RID_SIGNED: | |
6436 | case RID_RESTRICT: | |
6437 | case RID_COMPLEX: | |
6438 | case RID_IN: | |
6439 | case RID_OUT: | |
6440 | case RID_INOUT: | |
6441 | case RID_BYCOPY: | |
6442 | case RID_BYREF: | |
6443 | case RID_ONEWAY: | |
6444 | case RID_INT: | |
6445 | case RID_CHAR: | |
6446 | case RID_FLOAT: | |
6447 | case RID_DOUBLE: | |
6448 | case RID_VOID: | |
6449 | case RID_BOOL: | |
6450 | c_parser_consume_token (parser); | |
6451 | return value; | |
6452 | default: | |
6453 | return NULL_TREE; | |
6454 | } | |
6455 | } | |
6456 | ||
6457 | /* Parse an objc-selector-arg. | |
6458 | ||
6459 | objc-selector-arg: | |
6460 | objc-selector | |
6461 | objc-keywordname-list | |
6462 | ||
6463 | objc-keywordname-list: | |
6464 | objc-keywordname | |
6465 | objc-keywordname-list objc-keywordname | |
6466 | ||
6467 | objc-keywordname: | |
6468 | objc-selector : | |
6469 | : | |
6470 | */ | |
6471 | ||
6472 | static tree | |
6473 | c_parser_objc_selector_arg (c_parser *parser) | |
6474 | { | |
6475 | tree sel = c_parser_objc_selector (parser); | |
6476 | tree list = NULL_TREE; | |
6477 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6478 | return sel; | |
6479 | while (true) | |
6480 | { | |
6481 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6482 | return list; | |
6483 | list = chainon (list, build_tree_list (sel, NULL_TREE)); | |
6484 | sel = c_parser_objc_selector (parser); | |
6485 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6486 | break; | |
6487 | } | |
6488 | return list; | |
6489 | } | |
6490 | ||
6491 | /* Parse an objc-receiver. | |
6492 | ||
6493 | objc-receiver: | |
6494 | expression | |
6495 | class-name | |
6496 | type-name | |
6497 | */ | |
6498 | ||
6499 | static tree | |
6500 | c_parser_objc_receiver (c_parser *parser) | |
6501 | { | |
6502 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
6503 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME | |
6504 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
6505 | { | |
6506 | tree id = c_parser_peek_token (parser)->value; | |
6507 | c_parser_consume_token (parser); | |
6508 | return objc_get_class_reference (id); | |
6509 | } | |
6510 | return c_parser_expression (parser).value; | |
6511 | } | |
6512 | ||
6513 | /* Parse objc-message-args. | |
6514 | ||
6515 | objc-message-args: | |
6516 | objc-selector | |
6517 | objc-keywordarg-list | |
6518 | ||
6519 | objc-keywordarg-list: | |
6520 | objc-keywordarg | |
6521 | objc-keywordarg-list objc-keywordarg | |
6522 | ||
6523 | objc-keywordarg: | |
6524 | objc-selector : objc-keywordexpr | |
6525 | : objc-keywordexpr | |
6526 | */ | |
6527 | ||
6528 | static tree | |
6529 | c_parser_objc_message_args (c_parser *parser) | |
6530 | { | |
6531 | tree sel = c_parser_objc_selector (parser); | |
6532 | tree list = NULL_TREE; | |
6533 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6534 | return sel; | |
6535 | while (true) | |
6536 | { | |
6537 | tree keywordexpr; | |
6538 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
6539 | return list; | |
6540 | keywordexpr = c_parser_objc_keywordexpr (parser); | |
6541 | list = chainon (list, build_tree_list (sel, keywordexpr)); | |
6542 | sel = c_parser_objc_selector (parser); | |
6543 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
6544 | break; | |
6545 | } | |
6546 | return list; | |
6547 | } | |
6548 | ||
6549 | /* Parse an objc-keywordexpr. | |
6550 | ||
6551 | objc-keywordexpr: | |
6552 | nonempty-expr-list | |
6553 | */ | |
6554 | ||
6555 | static tree | |
6556 | c_parser_objc_keywordexpr (c_parser *parser) | |
6557 | { | |
46bdb9cf | 6558 | tree list = c_parser_expr_list (parser, true); |
27bf414c JM |
6559 | if (TREE_CHAIN (list) == NULL_TREE) |
6560 | { | |
6561 | /* Just return the expression, remove a level of | |
6562 | indirection. */ | |
6563 | return TREE_VALUE (list); | |
6564 | } | |
6565 | else | |
6566 | { | |
6567 | /* We have a comma expression, we will collapse later. */ | |
6568 | return list; | |
6569 | } | |
6570 | } | |
6571 | ||
6572 | \f | |
953ff289 DN |
6573 | /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore |
6574 | should be considered, statements. ALLOW_STMT is true if we're within | |
6575 | the context of a function and such pragmas are to be allowed. Returns | |
6576 | true if we actually parsed such a pragma. */ | |
27bf414c | 6577 | |
bc4071dd | 6578 | static bool |
953ff289 | 6579 | c_parser_pragma (c_parser *parser, enum pragma_context context) |
bc4071dd RH |
6580 | { |
6581 | unsigned int id; | |
6582 | ||
6583 | id = c_parser_peek_token (parser)->pragma_kind; | |
6584 | gcc_assert (id != PRAGMA_NONE); | |
6585 | ||
6586 | switch (id) | |
6587 | { | |
953ff289 DN |
6588 | case PRAGMA_OMP_BARRIER: |
6589 | if (context != pragma_compound) | |
6590 | { | |
6591 | if (context == pragma_stmt) | |
6592 | c_parser_error (parser, "%<#pragma omp barrier%> may only be " | |
6593 | "used in compound statements"); | |
6594 | goto bad_stmt; | |
6595 | } | |
6596 | c_parser_omp_barrier (parser); | |
6597 | return false; | |
6598 | ||
6599 | case PRAGMA_OMP_FLUSH: | |
6600 | if (context != pragma_compound) | |
6601 | { | |
6602 | if (context == pragma_stmt) | |
6603 | c_parser_error (parser, "%<#pragma omp flush%> may only be " | |
6604 | "used in compound statements"); | |
6605 | goto bad_stmt; | |
6606 | } | |
6607 | c_parser_omp_flush (parser); | |
6608 | return false; | |
6609 | ||
a68ab351 JJ |
6610 | case PRAGMA_OMP_TASKWAIT: |
6611 | if (context != pragma_compound) | |
6612 | { | |
6613 | if (context == pragma_stmt) | |
6614 | c_parser_error (parser, "%<#pragma omp taskwait%> may only be " | |
6615 | "used in compound statements"); | |
6616 | goto bad_stmt; | |
6617 | } | |
6618 | c_parser_omp_taskwait (parser); | |
6619 | return false; | |
6620 | ||
953ff289 DN |
6621 | case PRAGMA_OMP_THREADPRIVATE: |
6622 | c_parser_omp_threadprivate (parser); | |
6623 | return false; | |
6624 | ||
6625 | case PRAGMA_OMP_SECTION: | |
3ba09659 AH |
6626 | error_at (c_parser_peek_token (parser)->location, |
6627 | "%<#pragma omp section%> may only be used in " | |
6628 | "%<#pragma omp sections%> construct"); | |
953ff289 DN |
6629 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); |
6630 | return false; | |
6631 | ||
bc4071dd RH |
6632 | case PRAGMA_GCC_PCH_PREPROCESS: |
6633 | c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first"); | |
6634 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
6635 | return false; | |
6636 | ||
6637 | default: | |
953ff289 DN |
6638 | if (id < PRAGMA_FIRST_EXTERNAL) |
6639 | { | |
6640 | if (context == pragma_external) | |
6641 | { | |
6642 | bad_stmt: | |
6643 | c_parser_error (parser, "expected declaration specifiers"); | |
6644 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
6645 | return false; | |
6646 | } | |
6647 | c_parser_omp_construct (parser); | |
6648 | return true; | |
6649 | } | |
bc4071dd RH |
6650 | break; |
6651 | } | |
6652 | ||
6653 | c_parser_consume_pragma (parser); | |
6654 | c_invoke_pragma_handler (id); | |
27bf414c | 6655 | |
bc4071dd RH |
6656 | /* Skip to EOL, but suppress any error message. Those will have been |
6657 | generated by the handler routine through calling error, as opposed | |
6658 | to calling c_parser_error. */ | |
6659 | parser->error = true; | |
6660 | c_parser_skip_to_pragma_eol (parser); | |
6661 | ||
6662 | return false; | |
6663 | } | |
6664 | ||
6665 | /* The interface the pragma parsers have to the lexer. */ | |
6666 | ||
6667 | enum cpp_ttype | |
6668 | pragma_lex (tree *value) | |
6669 | { | |
6670 | c_token *tok = c_parser_peek_token (the_parser); | |
6671 | enum cpp_ttype ret = tok->type; | |
6672 | ||
6673 | *value = tok->value; | |
6674 | if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF) | |
6675 | ret = CPP_EOF; | |
6676 | else | |
6677 | { | |
6678 | if (ret == CPP_KEYWORD) | |
6679 | ret = CPP_NAME; | |
6680 | c_parser_consume_token (the_parser); | |
6681 | } | |
6682 | ||
6683 | return ret; | |
6684 | } | |
6685 | ||
6686 | static void | |
6687 | c_parser_pragma_pch_preprocess (c_parser *parser) | |
6688 | { | |
6689 | tree name = NULL; | |
6690 | ||
6691 | c_parser_consume_pragma (parser); | |
6692 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
6693 | { | |
6694 | name = c_parser_peek_token (parser)->value; | |
6695 | c_parser_consume_token (parser); | |
6696 | } | |
6697 | else | |
6698 | c_parser_error (parser, "expected string literal"); | |
6699 | c_parser_skip_to_pragma_eol (parser); | |
6700 | ||
6701 | if (name) | |
6702 | c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name)); | |
6703 | } | |
953ff289 DN |
6704 | \f |
6705 | /* OpenMP 2.5 parsing routines. */ | |
6706 | ||
6707 | /* Returns name of the next clause. | |
6708 | If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and | |
6709 | the token is not consumed. Otherwise appropriate pragma_omp_clause is | |
6710 | returned and the token is consumed. */ | |
6711 | ||
6712 | static pragma_omp_clause | |
6713 | c_parser_omp_clause_name (c_parser *parser) | |
6714 | { | |
6715 | pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE; | |
6716 | ||
6717 | if (c_parser_next_token_is_keyword (parser, RID_IF)) | |
6718 | result = PRAGMA_OMP_CLAUSE_IF; | |
6719 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
6720 | result = PRAGMA_OMP_CLAUSE_DEFAULT; | |
6721 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
6722 | { | |
6723 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
6724 | ||
6725 | switch (p[0]) | |
6726 | { | |
6727 | case 'c': | |
a68ab351 JJ |
6728 | if (!strcmp ("collapse", p)) |
6729 | result = PRAGMA_OMP_CLAUSE_COLLAPSE; | |
6730 | else if (!strcmp ("copyin", p)) | |
953ff289 DN |
6731 | result = PRAGMA_OMP_CLAUSE_COPYIN; |
6732 | else if (!strcmp ("copyprivate", p)) | |
6733 | result = PRAGMA_OMP_CLAUSE_COPYPRIVATE; | |
6734 | break; | |
6735 | case 'f': | |
6736 | if (!strcmp ("firstprivate", p)) | |
6737 | result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE; | |
6738 | break; | |
6739 | case 'l': | |
6740 | if (!strcmp ("lastprivate", p)) | |
6741 | result = PRAGMA_OMP_CLAUSE_LASTPRIVATE; | |
6742 | break; | |
6743 | case 'n': | |
6744 | if (!strcmp ("nowait", p)) | |
6745 | result = PRAGMA_OMP_CLAUSE_NOWAIT; | |
6746 | else if (!strcmp ("num_threads", p)) | |
6747 | result = PRAGMA_OMP_CLAUSE_NUM_THREADS; | |
6748 | break; | |
6749 | case 'o': | |
6750 | if (!strcmp ("ordered", p)) | |
6751 | result = PRAGMA_OMP_CLAUSE_ORDERED; | |
6752 | break; | |
6753 | case 'p': | |
6754 | if (!strcmp ("private", p)) | |
6755 | result = PRAGMA_OMP_CLAUSE_PRIVATE; | |
6756 | break; | |
6757 | case 'r': | |
6758 | if (!strcmp ("reduction", p)) | |
6759 | result = PRAGMA_OMP_CLAUSE_REDUCTION; | |
6760 | break; | |
6761 | case 's': | |
6762 | if (!strcmp ("schedule", p)) | |
6763 | result = PRAGMA_OMP_CLAUSE_SCHEDULE; | |
6764 | else if (!strcmp ("shared", p)) | |
6765 | result = PRAGMA_OMP_CLAUSE_SHARED; | |
6766 | break; | |
a68ab351 JJ |
6767 | case 'u': |
6768 | if (!strcmp ("untied", p)) | |
6769 | result = PRAGMA_OMP_CLAUSE_UNTIED; | |
6770 | break; | |
953ff289 DN |
6771 | } |
6772 | } | |
6773 | ||
6774 | if (result != PRAGMA_OMP_CLAUSE_NONE) | |
6775 | c_parser_consume_token (parser); | |
6776 | ||
6777 | return result; | |
6778 | } | |
6779 | ||
6780 | /* Validate that a clause of the given type does not already exist. */ | |
6781 | ||
6782 | static void | |
d75d71e0 ILT |
6783 | check_no_duplicate_clause (tree clauses, enum omp_clause_code code, |
6784 | const char *name) | |
953ff289 DN |
6785 | { |
6786 | tree c; | |
6787 | ||
6788 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
aaf46ef9 | 6789 | if (OMP_CLAUSE_CODE (c) == code) |
953ff289 DN |
6790 | { |
6791 | error ("too many %qs clauses", name); | |
6792 | break; | |
6793 | } | |
6794 | } | |
6795 | ||
6796 | /* OpenMP 2.5: | |
6797 | variable-list: | |
6798 | identifier | |
6799 | variable-list , identifier | |
6800 | ||
6801 | If KIND is nonzero, create the appropriate node and install the decl | |
6802 | in OMP_CLAUSE_DECL and add the node to the head of the list. | |
6803 | ||
6804 | If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE; | |
6805 | return the list created. */ | |
6806 | ||
6807 | static tree | |
aaf46ef9 DN |
6808 | c_parser_omp_variable_list (c_parser *parser, enum omp_clause_code kind, |
6809 | tree list) | |
953ff289 DN |
6810 | { |
6811 | if (c_parser_next_token_is_not (parser, CPP_NAME) | |
6812 | || c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
6813 | c_parser_error (parser, "expected identifier"); | |
6814 | ||
6815 | while (c_parser_next_token_is (parser, CPP_NAME) | |
6816 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
6817 | { | |
6818 | tree t = lookup_name (c_parser_peek_token (parser)->value); | |
6819 | ||
6820 | if (t == NULL_TREE) | |
6821 | undeclared_variable (c_parser_peek_token (parser)->value, | |
6822 | c_parser_peek_token (parser)->location); | |
6823 | else if (t == error_mark_node) | |
6824 | ; | |
6825 | else if (kind != 0) | |
6826 | { | |
aaf46ef9 | 6827 | tree u = build_omp_clause (kind); |
953ff289 DN |
6828 | OMP_CLAUSE_DECL (u) = t; |
6829 | OMP_CLAUSE_CHAIN (u) = list; | |
6830 | list = u; | |
6831 | } | |
6832 | else | |
6833 | list = tree_cons (t, NULL_TREE, list); | |
6834 | ||
6835 | c_parser_consume_token (parser); | |
6836 | ||
6837 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
6838 | break; | |
6839 | ||
6840 | c_parser_consume_token (parser); | |
6841 | } | |
6842 | ||
6843 | return list; | |
6844 | } | |
6845 | ||
6846 | /* Similarly, but expect leading and trailing parenthesis. This is a very | |
6847 | common case for omp clauses. */ | |
6848 | ||
6849 | static tree | |
d75d71e0 ILT |
6850 | c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind, |
6851 | tree list) | |
953ff289 DN |
6852 | { |
6853 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6854 | { | |
6855 | list = c_parser_omp_variable_list (parser, kind, list); | |
6856 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6857 | } | |
6858 | return list; | |
6859 | } | |
6860 | ||
a68ab351 JJ |
6861 | /* OpenMP 3.0: |
6862 | collapse ( constant-expression ) */ | |
6863 | ||
6864 | static tree | |
6865 | c_parser_omp_clause_collapse (c_parser *parser, tree list) | |
6866 | { | |
6867 | tree c, num = error_mark_node; | |
6868 | HOST_WIDE_INT n; | |
6869 | location_t loc; | |
6870 | ||
6871 | check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse"); | |
6872 | ||
6873 | loc = c_parser_peek_token (parser)->location; | |
6874 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6875 | { | |
6876 | num = c_parser_expr_no_commas (parser, NULL).value; | |
6877 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6878 | } | |
6879 | if (num == error_mark_node) | |
6880 | return list; | |
6881 | if (!INTEGRAL_TYPE_P (TREE_TYPE (num)) | |
6882 | || !host_integerp (num, 0) | |
6883 | || (n = tree_low_cst (num, 0)) <= 0 | |
6884 | || (int) n != n) | |
6885 | { | |
3ba09659 AH |
6886 | error_at (loc, |
6887 | "collapse argument needs positive constant integer expression"); | |
a68ab351 JJ |
6888 | return list; |
6889 | } | |
6890 | c = build_omp_clause (OMP_CLAUSE_COLLAPSE); | |
6891 | OMP_CLAUSE_COLLAPSE_EXPR (c) = num; | |
6892 | OMP_CLAUSE_CHAIN (c) = list; | |
6893 | return c; | |
6894 | } | |
6895 | ||
953ff289 DN |
6896 | /* OpenMP 2.5: |
6897 | copyin ( variable-list ) */ | |
6898 | ||
6899 | static tree | |
6900 | c_parser_omp_clause_copyin (c_parser *parser, tree list) | |
6901 | { | |
6902 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list); | |
6903 | } | |
6904 | ||
6905 | /* OpenMP 2.5: | |
6906 | copyprivate ( variable-list ) */ | |
6907 | ||
6908 | static tree | |
6909 | c_parser_omp_clause_copyprivate (c_parser *parser, tree list) | |
6910 | { | |
6911 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list); | |
6912 | } | |
6913 | ||
6914 | /* OpenMP 2.5: | |
6915 | default ( shared | none ) */ | |
6916 | ||
6917 | static tree | |
6918 | c_parser_omp_clause_default (c_parser *parser, tree list) | |
6919 | { | |
6920 | enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; | |
6921 | tree c; | |
6922 | ||
6923 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6924 | return list; | |
6925 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
6926 | { | |
6927 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
6928 | ||
6929 | switch (p[0]) | |
6930 | { | |
6931 | case 'n': | |
6932 | if (strcmp ("none", p) != 0) | |
6933 | goto invalid_kind; | |
6934 | kind = OMP_CLAUSE_DEFAULT_NONE; | |
6935 | break; | |
6936 | ||
6937 | case 's': | |
6938 | if (strcmp ("shared", p) != 0) | |
6939 | goto invalid_kind; | |
6940 | kind = OMP_CLAUSE_DEFAULT_SHARED; | |
6941 | break; | |
6942 | ||
6943 | default: | |
6944 | goto invalid_kind; | |
6945 | } | |
6946 | ||
6947 | c_parser_consume_token (parser); | |
6948 | } | |
6949 | else | |
6950 | { | |
6951 | invalid_kind: | |
6952 | c_parser_error (parser, "expected %<none%> or %<shared%>"); | |
6953 | } | |
6954 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6955 | ||
6956 | if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED) | |
6957 | return list; | |
6958 | ||
6959 | check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default"); | |
aaf46ef9 | 6960 | c = build_omp_clause (OMP_CLAUSE_DEFAULT); |
953ff289 DN |
6961 | OMP_CLAUSE_CHAIN (c) = list; |
6962 | OMP_CLAUSE_DEFAULT_KIND (c) = kind; | |
6963 | ||
6964 | return c; | |
6965 | } | |
6966 | ||
6967 | /* OpenMP 2.5: | |
6968 | firstprivate ( variable-list ) */ | |
6969 | ||
6970 | static tree | |
6971 | c_parser_omp_clause_firstprivate (c_parser *parser, tree list) | |
6972 | { | |
6973 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list); | |
6974 | } | |
6975 | ||
6976 | /* OpenMP 2.5: | |
6977 | if ( expression ) */ | |
6978 | ||
6979 | static tree | |
6980 | c_parser_omp_clause_if (c_parser *parser, tree list) | |
6981 | { | |
6982 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
6983 | { | |
6984 | tree t = c_parser_paren_condition (parser); | |
6985 | tree c; | |
6986 | ||
6987 | check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if"); | |
6988 | ||
aaf46ef9 | 6989 | c = build_omp_clause (OMP_CLAUSE_IF); |
953ff289 DN |
6990 | OMP_CLAUSE_IF_EXPR (c) = t; |
6991 | OMP_CLAUSE_CHAIN (c) = list; | |
6992 | list = c; | |
6993 | } | |
6994 | else | |
6995 | c_parser_error (parser, "expected %<(%>"); | |
6996 | ||
6997 | return list; | |
6998 | } | |
6999 | ||
7000 | /* OpenMP 2.5: | |
7001 | lastprivate ( variable-list ) */ | |
7002 | ||
7003 | static tree | |
7004 | c_parser_omp_clause_lastprivate (c_parser *parser, tree list) | |
7005 | { | |
7006 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list); | |
7007 | } | |
7008 | ||
7009 | /* OpenMP 2.5: | |
7010 | nowait */ | |
7011 | ||
7012 | static tree | |
7013 | c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7014 | { | |
7015 | tree c; | |
7016 | ||
7017 | check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait"); | |
7018 | ||
aaf46ef9 | 7019 | c = build_omp_clause (OMP_CLAUSE_NOWAIT); |
953ff289 DN |
7020 | OMP_CLAUSE_CHAIN (c) = list; |
7021 | return c; | |
7022 | } | |
7023 | ||
7024 | /* OpenMP 2.5: | |
7025 | num_threads ( expression ) */ | |
7026 | ||
7027 | static tree | |
7028 | c_parser_omp_clause_num_threads (c_parser *parser, tree list) | |
7029 | { | |
7030 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7031 | { | |
c7412148 | 7032 | location_t expr_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
7033 | tree c, t = c_parser_expression (parser).value; |
7034 | ||
7035 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7036 | ||
7037 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
7038 | { | |
7039 | c_parser_error (parser, "expected integer expression"); | |
7040 | return list; | |
7041 | } | |
7042 | ||
7043 | /* Attempt to statically determine when the number isn't positive. */ | |
7044 | c = fold_build2 (LE_EXPR, boolean_type_node, t, | |
7045 | build_int_cst (TREE_TYPE (t), 0)); | |
7046 | if (c == boolean_true_node) | |
7047 | { | |
3ba09659 AH |
7048 | warning_at (expr_loc, 0, |
7049 | "%<num_threads%> value must be positive"); | |
953ff289 DN |
7050 | t = integer_one_node; |
7051 | } | |
7052 | ||
7053 | check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads"); | |
7054 | ||
aaf46ef9 | 7055 | c = build_omp_clause (OMP_CLAUSE_NUM_THREADS); |
953ff289 DN |
7056 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; |
7057 | OMP_CLAUSE_CHAIN (c) = list; | |
7058 | list = c; | |
7059 | } | |
7060 | ||
7061 | return list; | |
7062 | } | |
7063 | ||
7064 | /* OpenMP 2.5: | |
7065 | ordered */ | |
7066 | ||
7067 | static tree | |
7068 | c_parser_omp_clause_ordered (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7069 | { | |
7070 | tree c; | |
7071 | ||
7072 | check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered"); | |
7073 | ||
aaf46ef9 | 7074 | c = build_omp_clause (OMP_CLAUSE_ORDERED); |
953ff289 DN |
7075 | OMP_CLAUSE_CHAIN (c) = list; |
7076 | return c; | |
7077 | } | |
7078 | ||
7079 | /* OpenMP 2.5: | |
7080 | private ( variable-list ) */ | |
7081 | ||
7082 | static tree | |
7083 | c_parser_omp_clause_private (c_parser *parser, tree list) | |
7084 | { | |
7085 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list); | |
7086 | } | |
7087 | ||
7088 | /* OpenMP 2.5: | |
7089 | reduction ( reduction-operator : variable-list ) | |
7090 | ||
7091 | reduction-operator: | |
7092 | One of: + * - & ^ | && || */ | |
7093 | ||
7094 | static tree | |
7095 | c_parser_omp_clause_reduction (c_parser *parser, tree list) | |
7096 | { | |
7097 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7098 | { | |
7099 | enum tree_code code; | |
7100 | ||
7101 | switch (c_parser_peek_token (parser)->type) | |
7102 | { | |
7103 | case CPP_PLUS: | |
7104 | code = PLUS_EXPR; | |
7105 | break; | |
7106 | case CPP_MULT: | |
7107 | code = MULT_EXPR; | |
7108 | break; | |
7109 | case CPP_MINUS: | |
7110 | code = MINUS_EXPR; | |
7111 | break; | |
7112 | case CPP_AND: | |
7113 | code = BIT_AND_EXPR; | |
7114 | break; | |
7115 | case CPP_XOR: | |
7116 | code = BIT_XOR_EXPR; | |
7117 | break; | |
7118 | case CPP_OR: | |
7119 | code = BIT_IOR_EXPR; | |
7120 | break; | |
7121 | case CPP_AND_AND: | |
7122 | code = TRUTH_ANDIF_EXPR; | |
7123 | break; | |
7124 | case CPP_OR_OR: | |
7125 | code = TRUTH_ORIF_EXPR; | |
7126 | break; | |
7127 | default: | |
7128 | c_parser_error (parser, | |
7129 | "expected %<+%>, %<*%>, %<-%>, %<&%>, " | |
7130 | "%<^%>, %<|%>, %<&&%>, or %<||%>"); | |
7131 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7132 | return list; | |
7133 | } | |
7134 | c_parser_consume_token (parser); | |
7135 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
7136 | { | |
7137 | tree nl, c; | |
7138 | ||
7139 | nl = c_parser_omp_variable_list (parser, OMP_CLAUSE_REDUCTION, list); | |
7140 | for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c)) | |
7141 | OMP_CLAUSE_REDUCTION_CODE (c) = code; | |
7142 | ||
7143 | list = nl; | |
7144 | } | |
7145 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7146 | } | |
7147 | return list; | |
7148 | } | |
7149 | ||
7150 | /* OpenMP 2.5: | |
7151 | schedule ( schedule-kind ) | |
7152 | schedule ( schedule-kind , expression ) | |
7153 | ||
7154 | schedule-kind: | |
a68ab351 | 7155 | static | dynamic | guided | runtime | auto |
953ff289 DN |
7156 | */ |
7157 | ||
7158 | static tree | |
7159 | c_parser_omp_clause_schedule (c_parser *parser, tree list) | |
7160 | { | |
7161 | tree c, t; | |
7162 | ||
7163 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
7164 | return list; | |
7165 | ||
aaf46ef9 | 7166 | c = build_omp_clause (OMP_CLAUSE_SCHEDULE); |
953ff289 DN |
7167 | |
7168 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7169 | { | |
7170 | tree kind = c_parser_peek_token (parser)->value; | |
7171 | const char *p = IDENTIFIER_POINTER (kind); | |
7172 | ||
7173 | switch (p[0]) | |
7174 | { | |
7175 | case 'd': | |
7176 | if (strcmp ("dynamic", p) != 0) | |
7177 | goto invalid_kind; | |
7178 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC; | |
7179 | break; | |
7180 | ||
7181 | case 'g': | |
7182 | if (strcmp ("guided", p) != 0) | |
7183 | goto invalid_kind; | |
7184 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED; | |
7185 | break; | |
7186 | ||
7187 | case 'r': | |
7188 | if (strcmp ("runtime", p) != 0) | |
7189 | goto invalid_kind; | |
7190 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME; | |
7191 | break; | |
7192 | ||
7193 | default: | |
7194 | goto invalid_kind; | |
7195 | } | |
7196 | } | |
7197 | else if (c_parser_next_token_is_keyword (parser, RID_STATIC)) | |
7198 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC; | |
a68ab351 JJ |
7199 | else if (c_parser_next_token_is_keyword (parser, RID_AUTO)) |
7200 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO; | |
953ff289 DN |
7201 | else |
7202 | goto invalid_kind; | |
7203 | ||
7204 | c_parser_consume_token (parser); | |
7205 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7206 | { | |
c7412148 | 7207 | location_t here; |
953ff289 DN |
7208 | c_parser_consume_token (parser); |
7209 | ||
c7412148 | 7210 | here = c_parser_peek_token (parser)->location; |
953ff289 DN |
7211 | t = c_parser_expr_no_commas (parser, NULL).value; |
7212 | ||
7213 | if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME) | |
3ba09659 AH |
7214 | error_at (here, "schedule %<runtime%> does not take " |
7215 | "a %<chunk_size%> parameter"); | |
a68ab351 | 7216 | else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO) |
3ba09659 AH |
7217 | error_at (here, |
7218 | "schedule %<auto%> does not take " | |
7219 | "a %<chunk_size%> parameter"); | |
953ff289 DN |
7220 | else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE) |
7221 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
7222 | else | |
7223 | c_parser_error (parser, "expected integer expression"); | |
7224 | ||
7225 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7226 | } | |
7227 | else | |
7228 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7229 | "expected %<,%> or %<)%>"); | |
7230 | ||
7231 | check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule"); | |
7232 | OMP_CLAUSE_CHAIN (c) = list; | |
7233 | return c; | |
7234 | ||
7235 | invalid_kind: | |
7236 | c_parser_error (parser, "invalid schedule kind"); | |
7237 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
7238 | return list; | |
7239 | } | |
7240 | ||
7241 | /* OpenMP 2.5: | |
7242 | shared ( variable-list ) */ | |
7243 | ||
7244 | static tree | |
7245 | c_parser_omp_clause_shared (c_parser *parser, tree list) | |
7246 | { | |
7247 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list); | |
7248 | } | |
7249 | ||
a68ab351 JJ |
7250 | /* OpenMP 3.0: |
7251 | untied */ | |
7252 | ||
7253 | static tree | |
7254 | c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
7255 | { | |
7256 | tree c; | |
7257 | ||
7258 | /* FIXME: Should we allow duplicates? */ | |
7259 | check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied"); | |
7260 | ||
7261 | c = build_omp_clause (OMP_CLAUSE_UNTIED); | |
7262 | OMP_CLAUSE_CHAIN (c) = list; | |
7263 | return c; | |
7264 | } | |
7265 | ||
953ff289 DN |
7266 | /* Parse all OpenMP clauses. The set clauses allowed by the directive |
7267 | is a bitmask in MASK. Return the list of clauses found; the result | |
7268 | of clause default goes in *pdefault. */ | |
7269 | ||
7270 | static tree | |
7271 | c_parser_omp_all_clauses (c_parser *parser, unsigned int mask, | |
7272 | const char *where) | |
7273 | { | |
7274 | tree clauses = NULL; | |
8085ca15 | 7275 | bool first = true; |
953ff289 DN |
7276 | |
7277 | while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
7278 | { | |
8085ca15 JJ |
7279 | location_t here; |
7280 | pragma_omp_clause c_kind; | |
953ff289 DN |
7281 | const char *c_name; |
7282 | tree prev = clauses; | |
7283 | ||
8085ca15 JJ |
7284 | if (!first && c_parser_next_token_is (parser, CPP_COMMA)) |
7285 | c_parser_consume_token (parser); | |
7286 | ||
7287 | first = false; | |
7288 | here = c_parser_peek_token (parser)->location; | |
7289 | c_kind = c_parser_omp_clause_name (parser); | |
7290 | ||
953ff289 DN |
7291 | switch (c_kind) |
7292 | { | |
a68ab351 JJ |
7293 | case PRAGMA_OMP_CLAUSE_COLLAPSE: |
7294 | clauses = c_parser_omp_clause_collapse (parser, clauses); | |
7295 | c_name = "collapse"; | |
7296 | break; | |
953ff289 DN |
7297 | case PRAGMA_OMP_CLAUSE_COPYIN: |
7298 | clauses = c_parser_omp_clause_copyin (parser, clauses); | |
7299 | c_name = "copyin"; | |
7300 | break; | |
7301 | case PRAGMA_OMP_CLAUSE_COPYPRIVATE: | |
7302 | clauses = c_parser_omp_clause_copyprivate (parser, clauses); | |
7303 | c_name = "copyprivate"; | |
7304 | break; | |
7305 | case PRAGMA_OMP_CLAUSE_DEFAULT: | |
7306 | clauses = c_parser_omp_clause_default (parser, clauses); | |
7307 | c_name = "default"; | |
7308 | break; | |
7309 | case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE: | |
7310 | clauses = c_parser_omp_clause_firstprivate (parser, clauses); | |
7311 | c_name = "firstprivate"; | |
7312 | break; | |
7313 | case PRAGMA_OMP_CLAUSE_IF: | |
7314 | clauses = c_parser_omp_clause_if (parser, clauses); | |
7315 | c_name = "if"; | |
7316 | break; | |
7317 | case PRAGMA_OMP_CLAUSE_LASTPRIVATE: | |
7318 | clauses = c_parser_omp_clause_lastprivate (parser, clauses); | |
7319 | c_name = "lastprivate"; | |
7320 | break; | |
7321 | case PRAGMA_OMP_CLAUSE_NOWAIT: | |
7322 | clauses = c_parser_omp_clause_nowait (parser, clauses); | |
7323 | c_name = "nowait"; | |
7324 | break; | |
7325 | case PRAGMA_OMP_CLAUSE_NUM_THREADS: | |
7326 | clauses = c_parser_omp_clause_num_threads (parser, clauses); | |
7327 | c_name = "num_threads"; | |
7328 | break; | |
7329 | case PRAGMA_OMP_CLAUSE_ORDERED: | |
7330 | clauses = c_parser_omp_clause_ordered (parser, clauses); | |
7331 | c_name = "ordered"; | |
7332 | break; | |
7333 | case PRAGMA_OMP_CLAUSE_PRIVATE: | |
7334 | clauses = c_parser_omp_clause_private (parser, clauses); | |
7335 | c_name = "private"; | |
7336 | break; | |
7337 | case PRAGMA_OMP_CLAUSE_REDUCTION: | |
7338 | clauses = c_parser_omp_clause_reduction (parser, clauses); | |
7339 | c_name = "reduction"; | |
7340 | break; | |
7341 | case PRAGMA_OMP_CLAUSE_SCHEDULE: | |
7342 | clauses = c_parser_omp_clause_schedule (parser, clauses); | |
7343 | c_name = "schedule"; | |
7344 | break; | |
7345 | case PRAGMA_OMP_CLAUSE_SHARED: | |
7346 | clauses = c_parser_omp_clause_shared (parser, clauses); | |
7347 | c_name = "shared"; | |
7348 | break; | |
a68ab351 JJ |
7349 | case PRAGMA_OMP_CLAUSE_UNTIED: |
7350 | clauses = c_parser_omp_clause_untied (parser, clauses); | |
7351 | c_name = "untied"; | |
7352 | break; | |
953ff289 DN |
7353 | default: |
7354 | c_parser_error (parser, "expected %<#pragma omp%> clause"); | |
7355 | goto saw_error; | |
7356 | } | |
7357 | ||
7358 | if (((mask >> c_kind) & 1) == 0 && !parser->error) | |
7359 | { | |
7360 | /* Remove the invalid clause(s) from the list to avoid | |
7361 | confusing the rest of the compiler. */ | |
7362 | clauses = prev; | |
3ba09659 | 7363 | error_at (here, "%qs is not valid for %qs", c_name, where); |
953ff289 DN |
7364 | } |
7365 | } | |
7366 | ||
7367 | saw_error: | |
7368 | c_parser_skip_to_pragma_eol (parser); | |
7369 | ||
7370 | return c_finish_omp_clauses (clauses); | |
7371 | } | |
7372 | ||
7373 | /* OpenMP 2.5: | |
7374 | structured-block: | |
7375 | statement | |
7376 | ||
7377 | In practice, we're also interested in adding the statement to an | |
7378 | outer node. So it is convenient if we work around the fact that | |
7379 | c_parser_statement calls add_stmt. */ | |
7380 | ||
7381 | static tree | |
7382 | c_parser_omp_structured_block (c_parser *parser) | |
7383 | { | |
7384 | tree stmt = push_stmt_list (); | |
7385 | c_parser_statement (parser); | |
7386 | return pop_stmt_list (stmt); | |
7387 | } | |
7388 | ||
7389 | /* OpenMP 2.5: | |
7390 | # pragma omp atomic new-line | |
7391 | expression-stmt | |
7392 | ||
7393 | expression-stmt: | |
7394 | x binop= expr | x++ | ++x | x-- | --x | |
7395 | binop: | |
7396 | +, *, -, /, &, ^, |, <<, >> | |
7397 | ||
7398 | where x is an lvalue expression with scalar type. */ | |
7399 | ||
7400 | static void | |
7401 | c_parser_omp_atomic (c_parser *parser) | |
7402 | { | |
7403 | tree lhs, rhs; | |
fe89d797 | 7404 | tree stmt; |
953ff289 | 7405 | enum tree_code code; |
79addd1f | 7406 | struct c_expr rhs_expr; |
953ff289 DN |
7407 | |
7408 | c_parser_skip_to_pragma_eol (parser); | |
7409 | ||
7410 | lhs = c_parser_unary_expression (parser).value; | |
7411 | switch (TREE_CODE (lhs)) | |
7412 | { | |
7413 | case ERROR_MARK: | |
7414 | saw_error: | |
7415 | c_parser_skip_to_end_of_block_or_statement (parser); | |
7416 | return; | |
7417 | ||
7418 | case PREINCREMENT_EXPR: | |
7419 | case POSTINCREMENT_EXPR: | |
7420 | lhs = TREE_OPERAND (lhs, 0); | |
7421 | code = PLUS_EXPR; | |
7422 | rhs = integer_one_node; | |
7423 | break; | |
7424 | ||
7425 | case PREDECREMENT_EXPR: | |
7426 | case POSTDECREMENT_EXPR: | |
7427 | lhs = TREE_OPERAND (lhs, 0); | |
7428 | code = MINUS_EXPR; | |
7429 | rhs = integer_one_node; | |
7430 | break; | |
7431 | ||
7432 | default: | |
7433 | switch (c_parser_peek_token (parser)->type) | |
7434 | { | |
7435 | case CPP_MULT_EQ: | |
7436 | code = MULT_EXPR; | |
7437 | break; | |
7438 | case CPP_DIV_EQ: | |
7439 | code = TRUNC_DIV_EXPR; | |
7440 | break; | |
7441 | case CPP_PLUS_EQ: | |
7442 | code = PLUS_EXPR; | |
7443 | break; | |
7444 | case CPP_MINUS_EQ: | |
7445 | code = MINUS_EXPR; | |
7446 | break; | |
7447 | case CPP_LSHIFT_EQ: | |
7448 | code = LSHIFT_EXPR; | |
7449 | break; | |
7450 | case CPP_RSHIFT_EQ: | |
7451 | code = RSHIFT_EXPR; | |
7452 | break; | |
7453 | case CPP_AND_EQ: | |
7454 | code = BIT_AND_EXPR; | |
7455 | break; | |
7456 | case CPP_OR_EQ: | |
7457 | code = BIT_IOR_EXPR; | |
7458 | break; | |
7459 | case CPP_XOR_EQ: | |
7460 | code = BIT_XOR_EXPR; | |
7461 | break; | |
7462 | default: | |
7463 | c_parser_error (parser, | |
7464 | "invalid operator for %<#pragma omp atomic%>"); | |
7465 | goto saw_error; | |
7466 | } | |
7467 | ||
7468 | c_parser_consume_token (parser); | |
79addd1f JJ |
7469 | rhs_expr = c_parser_expression (parser); |
7470 | rhs_expr = default_function_array_conversion (rhs_expr); | |
7471 | rhs = rhs_expr.value; | |
953ff289 DN |
7472 | break; |
7473 | } | |
fe89d797 MM |
7474 | stmt = c_finish_omp_atomic (code, lhs, rhs); |
7475 | if (stmt != error_mark_node) | |
7476 | add_stmt (stmt); | |
953ff289 DN |
7477 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7478 | } | |
7479 | ||
7480 | ||
7481 | /* OpenMP 2.5: | |
7482 | # pragma omp barrier new-line | |
7483 | */ | |
7484 | ||
7485 | static void | |
7486 | c_parser_omp_barrier (c_parser *parser) | |
7487 | { | |
7488 | c_parser_consume_pragma (parser); | |
7489 | c_parser_skip_to_pragma_eol (parser); | |
7490 | ||
7491 | c_finish_omp_barrier (); | |
7492 | } | |
7493 | ||
7494 | /* OpenMP 2.5: | |
7495 | # pragma omp critical [(name)] new-line | |
7496 | structured-block | |
7497 | */ | |
7498 | ||
7499 | static tree | |
7500 | c_parser_omp_critical (c_parser *parser) | |
7501 | { | |
7502 | tree stmt, name = NULL; | |
7503 | ||
7504 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7505 | { | |
7506 | c_parser_consume_token (parser); | |
7507 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
7508 | { | |
7509 | name = c_parser_peek_token (parser)->value; | |
7510 | c_parser_consume_token (parser); | |
7511 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7512 | } | |
7513 | else | |
7514 | c_parser_error (parser, "expected identifier"); | |
7515 | } | |
7516 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
7517 | c_parser_error (parser, "expected %<(%> or end of line"); | |
7518 | c_parser_skip_to_pragma_eol (parser); | |
7519 | ||
7520 | stmt = c_parser_omp_structured_block (parser); | |
7521 | return c_finish_omp_critical (stmt, name); | |
7522 | } | |
7523 | ||
7524 | /* OpenMP 2.5: | |
7525 | # pragma omp flush flush-vars[opt] new-line | |
7526 | ||
7527 | flush-vars: | |
7528 | ( variable-list ) */ | |
7529 | ||
7530 | static void | |
7531 | c_parser_omp_flush (c_parser *parser) | |
7532 | { | |
7533 | c_parser_consume_pragma (parser); | |
7534 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
d75d71e0 | 7535 | c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 DN |
7536 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) |
7537 | c_parser_error (parser, "expected %<(%> or end of line"); | |
7538 | c_parser_skip_to_pragma_eol (parser); | |
7539 | ||
7540 | c_finish_omp_flush (); | |
7541 | } | |
7542 | ||
fa10beec | 7543 | /* Parse the restricted form of the for statement allowed by OpenMP. |
953ff289 DN |
7544 | The real trick here is to determine the loop control variable early |
7545 | so that we can push a new decl if necessary to make it private. */ | |
7546 | ||
7547 | static tree | |
a68ab351 | 7548 | c_parser_omp_for_loop (c_parser *parser, tree clauses, tree *par_clauses) |
953ff289 | 7549 | { |
a68ab351 JJ |
7550 | tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl; |
7551 | tree declv, condv, incrv, initv, for_block = NULL, ret = NULL; | |
953ff289 | 7552 | location_t loc; |
a68ab351 JJ |
7553 | bool fail = false, open_brace_parsed = false; |
7554 | int i, collapse = 1, nbraces = 0; | |
7555 | ||
7556 | for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl)) | |
7557 | if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE) | |
7558 | collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0); | |
7559 | ||
7560 | gcc_assert (collapse >= 1); | |
7561 | ||
7562 | declv = make_tree_vec (collapse); | |
7563 | initv = make_tree_vec (collapse); | |
7564 | condv = make_tree_vec (collapse); | |
7565 | incrv = make_tree_vec (collapse); | |
953ff289 DN |
7566 | |
7567 | if (!c_parser_next_token_is_keyword (parser, RID_FOR)) | |
7568 | { | |
7569 | c_parser_error (parser, "for statement expected"); | |
7570 | return NULL; | |
7571 | } | |
7572 | loc = c_parser_peek_token (parser)->location; | |
7573 | c_parser_consume_token (parser); | |
7574 | ||
a68ab351 | 7575 | for (i = 0; i < collapse; i++) |
953ff289 | 7576 | { |
a68ab351 | 7577 | int bracecount = 0; |
953ff289 | 7578 | |
a68ab351 JJ |
7579 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7580 | goto pop_scopes; | |
953ff289 | 7581 | |
a68ab351 JJ |
7582 | /* Parse the initialization declaration or expression. */ |
7583 | if (c_parser_next_token_starts_declspecs (parser)) | |
7584 | { | |
7585 | if (i > 0) | |
7586 | for_block | |
7587 | = tree_cons (NULL, c_begin_compound_stmt (true), for_block); | |
7588 | c_parser_declaration_or_fndef (parser, true, true, true, true); | |
7589 | decl = check_for_loop_decls (); | |
7590 | if (decl == NULL) | |
7591 | goto error_init; | |
7592 | if (DECL_INITIAL (decl) == error_mark_node) | |
7593 | decl = error_mark_node; | |
7594 | init = decl; | |
7595 | } | |
7596 | else if (c_parser_next_token_is (parser, CPP_NAME) | |
7597 | && c_parser_peek_2nd_token (parser)->type == CPP_EQ) | |
7598 | { | |
7599 | struct c_expr init_exp; | |
c9f9eb5d | 7600 | location_t init_loc; |
a68ab351 JJ |
7601 | |
7602 | decl = c_parser_postfix_expression (parser).value; | |
7603 | ||
7604 | c_parser_require (parser, CPP_EQ, "expected %<=%>"); | |
c9f9eb5d | 7605 | init_loc = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
7606 | |
7607 | init_exp = c_parser_expr_no_commas (parser, NULL); | |
7608 | init_exp = default_function_array_conversion (init_exp); | |
c9f9eb5d AH |
7609 | init = build_modify_expr (init_loc, |
7610 | decl, NOP_EXPR, init_exp.value); | |
a68ab351 | 7611 | init = c_process_expr_stmt (init); |
953ff289 | 7612 | |
a68ab351 JJ |
7613 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7614 | } | |
7615 | else | |
7616 | { | |
7617 | error_init: | |
7618 | c_parser_error (parser, | |
7619 | "expected iteration declaration or initialization"); | |
7620 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7621 | "expected %<)%>"); | |
7622 | fail = true; | |
7623 | goto parse_next; | |
7624 | } | |
7625 | ||
7626 | /* Parse the loop condition. */ | |
7627 | cond = NULL_TREE; | |
7628 | if (c_parser_next_token_is_not (parser, CPP_SEMICOLON)) | |
7629 | { | |
3ba09659 AH |
7630 | location_t cond_loc = c_parser_peek_token (parser)->location; |
7631 | ||
a68ab351 | 7632 | cond = c_parser_expression_conv (parser).value; |
3ba09659 | 7633 | cond = c_objc_common_truthvalue_conversion (cond_loc, cond); |
c9f9eb5d | 7634 | protected_set_expr_location (cond, cond_loc); |
a68ab351 | 7635 | } |
953ff289 | 7636 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
953ff289 | 7637 | |
a68ab351 JJ |
7638 | /* Parse the increment expression. */ |
7639 | incr = NULL_TREE; | |
7640 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)) | |
c9f9eb5d AH |
7641 | { |
7642 | location_t incr_loc = c_parser_peek_token (parser)->location; | |
7643 | ||
7644 | incr = c_process_expr_stmt (c_parser_expression (parser).value); | |
7645 | protected_set_expr_location (incr, incr_loc); | |
7646 | } | |
a68ab351 | 7647 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
953ff289 | 7648 | |
a68ab351 JJ |
7649 | if (decl == NULL || decl == error_mark_node || init == error_mark_node) |
7650 | fail = true; | |
7651 | else | |
7652 | { | |
7653 | TREE_VEC_ELT (declv, i) = decl; | |
7654 | TREE_VEC_ELT (initv, i) = init; | |
7655 | TREE_VEC_ELT (condv, i) = cond; | |
7656 | TREE_VEC_ELT (incrv, i) = incr; | |
7657 | } | |
7658 | ||
7659 | parse_next: | |
7660 | if (i == collapse - 1) | |
7661 | break; | |
7662 | ||
7663 | /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed | |
7664 | in between the collapsed for loops to be still considered perfectly | |
7665 | nested. Hopefully the final version clarifies this. | |
7666 | For now handle (multiple) {'s and empty statements. */ | |
7667 | do | |
7668 | { | |
7669 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
7670 | { | |
7671 | c_parser_consume_token (parser); | |
7672 | break; | |
7673 | } | |
7674 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
7675 | { | |
7676 | c_parser_consume_token (parser); | |
7677 | bracecount++; | |
7678 | } | |
7679 | else if (bracecount | |
7680 | && c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7681 | c_parser_consume_token (parser); | |
7682 | else | |
7683 | { | |
7684 | c_parser_error (parser, "not enough perfectly nested loops"); | |
7685 | if (bracecount) | |
7686 | { | |
7687 | open_brace_parsed = true; | |
7688 | bracecount--; | |
7689 | } | |
7690 | fail = true; | |
7691 | collapse = 0; | |
7692 | break; | |
7693 | } | |
7694 | } | |
7695 | while (1); | |
7696 | ||
7697 | nbraces += bracecount; | |
7698 | } | |
953ff289 | 7699 | |
953ff289 DN |
7700 | save_break = c_break_label; |
7701 | c_break_label = size_one_node; | |
7702 | save_cont = c_cont_label; | |
7703 | c_cont_label = NULL_TREE; | |
7704 | body = push_stmt_list (); | |
7705 | ||
a68ab351 JJ |
7706 | if (open_brace_parsed) |
7707 | { | |
7708 | stmt = c_begin_compound_stmt (true); | |
7709 | c_parser_compound_statement_nostart (parser); | |
7710 | add_stmt (c_end_compound_stmt (stmt, true)); | |
7711 | } | |
7712 | else | |
7713 | add_stmt (c_parser_c99_block_statement (parser)); | |
953ff289 DN |
7714 | if (c_cont_label) |
7715 | add_stmt (build1 (LABEL_EXPR, void_type_node, c_cont_label)); | |
7716 | ||
7717 | body = pop_stmt_list (body); | |
7718 | c_break_label = save_break; | |
7719 | c_cont_label = save_cont; | |
7720 | ||
a68ab351 JJ |
7721 | while (nbraces) |
7722 | { | |
7723 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
7724 | { | |
7725 | c_parser_consume_token (parser); | |
7726 | nbraces--; | |
7727 | } | |
7728 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7729 | c_parser_consume_token (parser); | |
7730 | else | |
7731 | { | |
7732 | c_parser_error (parser, "collapsed loops not perfectly nested"); | |
7733 | while (nbraces) | |
7734 | { | |
7735 | stmt = c_begin_compound_stmt (true); | |
7736 | add_stmt (body); | |
7737 | c_parser_compound_statement_nostart (parser); | |
7738 | body = c_end_compound_stmt (stmt, true); | |
7739 | nbraces--; | |
7740 | } | |
7741 | goto pop_scopes; | |
7742 | } | |
7743 | } | |
7744 | ||
61c3a446 | 7745 | /* Only bother calling c_finish_omp_for if we haven't already generated |
953ff289 | 7746 | an error from the initialization parsing. */ |
a68ab351 JJ |
7747 | if (!fail) |
7748 | { | |
7749 | stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL); | |
7750 | if (stmt) | |
7751 | { | |
7752 | if (par_clauses != NULL) | |
7753 | { | |
7754 | tree *c; | |
7755 | for (c = par_clauses; *c ; ) | |
7756 | if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE | |
7757 | && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE) | |
7758 | c = &OMP_CLAUSE_CHAIN (*c); | |
7759 | else | |
7760 | { | |
7761 | for (i = 0; i < collapse; i++) | |
7762 | if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c)) | |
7763 | break; | |
7764 | if (i == collapse) | |
7765 | c = &OMP_CLAUSE_CHAIN (*c); | |
7766 | else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE) | |
7767 | { | |
3ba09659 AH |
7768 | error_at (loc, |
7769 | "iteration variable %qD should not be firstprivate", | |
7770 | OMP_CLAUSE_DECL (*c)); | |
a68ab351 JJ |
7771 | *c = OMP_CLAUSE_CHAIN (*c); |
7772 | } | |
7773 | else | |
7774 | { | |
7775 | /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES, | |
7776 | change it to shared (decl) in | |
7777 | OMP_PARALLEL_CLAUSES. */ | |
7778 | tree l = build_omp_clause (OMP_CLAUSE_LASTPRIVATE); | |
7779 | OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c); | |
7780 | OMP_CLAUSE_CHAIN (l) = clauses; | |
7781 | clauses = l; | |
7782 | OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED); | |
7783 | } | |
7784 | } | |
7785 | } | |
7786 | OMP_FOR_CLAUSES (stmt) = clauses; | |
7787 | } | |
7788 | ret = stmt; | |
7789 | } | |
7790 | pop_scopes: | |
7791 | while (for_block) | |
7792 | { | |
7793 | stmt = c_end_compound_stmt (TREE_VALUE (for_block), true); | |
7794 | add_stmt (stmt); | |
7795 | for_block = TREE_CHAIN (for_block); | |
7796 | } | |
7797 | return ret; | |
953ff289 DN |
7798 | } |
7799 | ||
7800 | /* OpenMP 2.5: | |
7801 | #pragma omp for for-clause[optseq] new-line | |
7802 | for-loop | |
7803 | */ | |
7804 | ||
7805 | #define OMP_FOR_CLAUSE_MASK \ | |
7806 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
7807 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
7808 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
7809 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
7810 | | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \ | |
7811 | | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \ | |
a68ab351 | 7812 | | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \ |
953ff289 DN |
7813 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) |
7814 | ||
7815 | static tree | |
7816 | c_parser_omp_for (c_parser *parser) | |
7817 | { | |
7818 | tree block, clauses, ret; | |
7819 | ||
7820 | clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK, | |
7821 | "#pragma omp for"); | |
7822 | ||
7823 | block = c_begin_compound_stmt (true); | |
a68ab351 | 7824 | ret = c_parser_omp_for_loop (parser, clauses, NULL); |
953ff289 DN |
7825 | block = c_end_compound_stmt (block, true); |
7826 | add_stmt (block); | |
7827 | ||
7828 | return ret; | |
7829 | } | |
7830 | ||
7831 | /* OpenMP 2.5: | |
7832 | # pragma omp master new-line | |
7833 | structured-block | |
7834 | */ | |
7835 | ||
7836 | static tree | |
7837 | c_parser_omp_master (c_parser *parser) | |
7838 | { | |
7839 | c_parser_skip_to_pragma_eol (parser); | |
7840 | return c_finish_omp_master (c_parser_omp_structured_block (parser)); | |
7841 | } | |
7842 | ||
7843 | /* OpenMP 2.5: | |
7844 | # pragma omp ordered new-line | |
7845 | structured-block | |
7846 | */ | |
7847 | ||
7848 | static tree | |
7849 | c_parser_omp_ordered (c_parser *parser) | |
7850 | { | |
7851 | c_parser_skip_to_pragma_eol (parser); | |
7852 | return c_finish_omp_ordered (c_parser_omp_structured_block (parser)); | |
7853 | } | |
7854 | ||
7855 | /* OpenMP 2.5: | |
7856 | ||
7857 | section-scope: | |
7858 | { section-sequence } | |
7859 | ||
7860 | section-sequence: | |
7861 | section-directive[opt] structured-block | |
7862 | section-sequence section-directive structured-block */ | |
7863 | ||
7864 | static tree | |
7865 | c_parser_omp_sections_scope (c_parser *parser) | |
7866 | { | |
7867 | tree stmt, substmt; | |
7868 | bool error_suppress = false; | |
7869 | location_t loc; | |
7870 | ||
7871 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) | |
7872 | { | |
7873 | /* Avoid skipping until the end of the block. */ | |
7874 | parser->error = false; | |
7875 | return NULL_TREE; | |
7876 | } | |
7877 | ||
7878 | stmt = push_stmt_list (); | |
7879 | ||
7880 | loc = c_parser_peek_token (parser)->location; | |
7881 | if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION) | |
7882 | { | |
7883 | substmt = push_stmt_list (); | |
7884 | ||
7885 | while (1) | |
7886 | { | |
7887 | c_parser_statement (parser); | |
7888 | ||
7889 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
7890 | break; | |
7891 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
7892 | break; | |
7893 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
7894 | break; | |
7895 | } | |
7896 | ||
7897 | substmt = pop_stmt_list (substmt); | |
7898 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
7899 | SET_EXPR_LOCATION (substmt, loc); | |
7900 | add_stmt (substmt); | |
7901 | } | |
7902 | ||
7903 | while (1) | |
7904 | { | |
7905 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
7906 | break; | |
7907 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
7908 | break; | |
7909 | ||
7910 | loc = c_parser_peek_token (parser)->location; | |
7911 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
7912 | { | |
7913 | c_parser_consume_pragma (parser); | |
7914 | c_parser_skip_to_pragma_eol (parser); | |
7915 | error_suppress = false; | |
7916 | } | |
7917 | else if (!error_suppress) | |
7918 | { | |
3ba09659 | 7919 | error_at (loc, "expected %<#pragma omp section%> or %<}%>"); |
953ff289 DN |
7920 | error_suppress = true; |
7921 | } | |
7922 | ||
7923 | substmt = c_parser_omp_structured_block (parser); | |
7924 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
7925 | SET_EXPR_LOCATION (substmt, loc); | |
7926 | add_stmt (substmt); | |
7927 | } | |
7928 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, | |
7929 | "expected %<#pragma omp section%> or %<}%>"); | |
7930 | ||
7931 | substmt = pop_stmt_list (stmt); | |
7932 | ||
7933 | stmt = make_node (OMP_SECTIONS); | |
7934 | TREE_TYPE (stmt) = void_type_node; | |
7935 | OMP_SECTIONS_BODY (stmt) = substmt; | |
7936 | ||
7937 | return add_stmt (stmt); | |
7938 | } | |
7939 | ||
7940 | /* OpenMP 2.5: | |
7941 | # pragma omp sections sections-clause[optseq] newline | |
7942 | sections-scope | |
7943 | */ | |
7944 | ||
7945 | #define OMP_SECTIONS_CLAUSE_MASK \ | |
7946 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
7947 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
7948 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
7949 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
7950 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
7951 | ||
7952 | static tree | |
7953 | c_parser_omp_sections (c_parser *parser) | |
7954 | { | |
7955 | tree block, clauses, ret; | |
7956 | ||
7957 | clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK, | |
7958 | "#pragma omp sections"); | |
7959 | ||
7960 | block = c_begin_compound_stmt (true); | |
7961 | ret = c_parser_omp_sections_scope (parser); | |
7962 | if (ret) | |
7963 | OMP_SECTIONS_CLAUSES (ret) = clauses; | |
7964 | block = c_end_compound_stmt (block, true); | |
7965 | add_stmt (block); | |
7966 | ||
7967 | return ret; | |
7968 | } | |
7969 | ||
7970 | /* OpenMP 2.5: | |
7971 | # pragma parallel parallel-clause new-line | |
7972 | # pragma parallel for parallel-for-clause new-line | |
7973 | # pragma parallel sections parallel-sections-clause new-line | |
7974 | */ | |
7975 | ||
7976 | #define OMP_PARALLEL_CLAUSE_MASK \ | |
7977 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
7978 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
7979 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
7980 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
7981 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ | |
7982 | | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \ | |
7983 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
7984 | | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS)) | |
7985 | ||
7986 | static tree | |
7987 | c_parser_omp_parallel (c_parser *parser) | |
7988 | { | |
7989 | enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL; | |
7990 | const char *p_name = "#pragma omp parallel"; | |
7991 | tree stmt, clauses, par_clause, ws_clause, block; | |
7992 | unsigned int mask = OMP_PARALLEL_CLAUSE_MASK; | |
7993 | ||
7994 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
7995 | { | |
7996 | c_parser_consume_token (parser); | |
7997 | p_kind = PRAGMA_OMP_PARALLEL_FOR; | |
7998 | p_name = "#pragma omp parallel for"; | |
7999 | mask |= OMP_FOR_CLAUSE_MASK; | |
8000 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8001 | } | |
8002 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
8003 | { | |
8004 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8005 | if (strcmp (p, "sections") == 0) | |
8006 | { | |
8007 | c_parser_consume_token (parser); | |
8008 | p_kind = PRAGMA_OMP_PARALLEL_SECTIONS; | |
8009 | p_name = "#pragma omp parallel sections"; | |
8010 | mask |= OMP_SECTIONS_CLAUSE_MASK; | |
8011 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
8012 | } | |
8013 | } | |
8014 | ||
8015 | clauses = c_parser_omp_all_clauses (parser, mask, p_name); | |
8016 | ||
8017 | switch (p_kind) | |
8018 | { | |
8019 | case PRAGMA_OMP_PARALLEL: | |
8020 | block = c_begin_omp_parallel (); | |
8021 | c_parser_statement (parser); | |
8022 | stmt = c_finish_omp_parallel (clauses, block); | |
8023 | break; | |
8024 | ||
8025 | case PRAGMA_OMP_PARALLEL_FOR: | |
8026 | block = c_begin_omp_parallel (); | |
8027 | c_split_parallel_clauses (clauses, &par_clause, &ws_clause); | |
a68ab351 | 8028 | c_parser_omp_for_loop (parser, ws_clause, &par_clause); |
953ff289 | 8029 | stmt = c_finish_omp_parallel (par_clause, block); |
761041be | 8030 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8031 | break; |
8032 | ||
8033 | case PRAGMA_OMP_PARALLEL_SECTIONS: | |
8034 | block = c_begin_omp_parallel (); | |
8035 | c_split_parallel_clauses (clauses, &par_clause, &ws_clause); | |
8036 | stmt = c_parser_omp_sections_scope (parser); | |
8037 | if (stmt) | |
8038 | OMP_SECTIONS_CLAUSES (stmt) = ws_clause; | |
8039 | stmt = c_finish_omp_parallel (par_clause, block); | |
761041be | 8040 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
8041 | break; |
8042 | ||
8043 | default: | |
8044 | gcc_unreachable (); | |
8045 | } | |
8046 | ||
8047 | return stmt; | |
8048 | } | |
8049 | ||
8050 | /* OpenMP 2.5: | |
8051 | # pragma omp single single-clause[optseq] new-line | |
8052 | structured-block | |
8053 | */ | |
8054 | ||
8055 | #define OMP_SINGLE_CLAUSE_MASK \ | |
8056 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8057 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8058 | | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \ | |
8059 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
8060 | ||
8061 | static tree | |
8062 | c_parser_omp_single (c_parser *parser) | |
8063 | { | |
8064 | tree stmt = make_node (OMP_SINGLE); | |
8065 | TREE_TYPE (stmt) = void_type_node; | |
8066 | ||
8067 | OMP_SINGLE_CLAUSES (stmt) | |
8068 | = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK, | |
8069 | "#pragma omp single"); | |
8070 | OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser); | |
8071 | ||
8072 | return add_stmt (stmt); | |
8073 | } | |
8074 | ||
a68ab351 JJ |
8075 | /* OpenMP 3.0: |
8076 | # pragma omp task task-clause[optseq] new-line | |
8077 | */ | |
8078 | ||
8079 | #define OMP_TASK_CLAUSE_MASK \ | |
8080 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
8081 | | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \ | |
8082 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
8083 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
8084 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
8085 | | (1u << PRAGMA_OMP_CLAUSE_SHARED)) | |
8086 | ||
8087 | static tree | |
8088 | c_parser_omp_task (c_parser *parser) | |
8089 | { | |
8090 | tree clauses, block; | |
8091 | ||
8092 | clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK, | |
8093 | "#pragma omp task"); | |
8094 | ||
8095 | block = c_begin_omp_task (); | |
8096 | c_parser_statement (parser); | |
8097 | return c_finish_omp_task (clauses, block); | |
8098 | } | |
8099 | ||
8100 | /* OpenMP 3.0: | |
8101 | # pragma omp taskwait new-line | |
8102 | */ | |
8103 | ||
8104 | static void | |
8105 | c_parser_omp_taskwait (c_parser *parser) | |
8106 | { | |
8107 | c_parser_consume_pragma (parser); | |
8108 | c_parser_skip_to_pragma_eol (parser); | |
8109 | ||
8110 | c_finish_omp_taskwait (); | |
8111 | } | |
953ff289 DN |
8112 | |
8113 | /* Main entry point to parsing most OpenMP pragmas. */ | |
8114 | ||
8115 | static void | |
8116 | c_parser_omp_construct (c_parser *parser) | |
8117 | { | |
8118 | enum pragma_kind p_kind; | |
8119 | location_t loc; | |
8120 | tree stmt; | |
8121 | ||
8122 | loc = c_parser_peek_token (parser)->location; | |
8123 | p_kind = c_parser_peek_token (parser)->pragma_kind; | |
8124 | c_parser_consume_pragma (parser); | |
8125 | ||
5c386a95 JJ |
8126 | /* For all constructs below except #pragma omp atomic |
8127 | MUST_NOT_THROW catch handlers are needed when exceptions | |
8128 | are enabled. */ | |
8129 | if (p_kind != PRAGMA_OMP_ATOMIC) | |
8130 | c_maybe_initialize_eh (); | |
8131 | ||
953ff289 DN |
8132 | switch (p_kind) |
8133 | { | |
8134 | case PRAGMA_OMP_ATOMIC: | |
8135 | c_parser_omp_atomic (parser); | |
8136 | return; | |
8137 | case PRAGMA_OMP_CRITICAL: | |
8138 | stmt = c_parser_omp_critical (parser); | |
8139 | break; | |
8140 | case PRAGMA_OMP_FOR: | |
8141 | stmt = c_parser_omp_for (parser); | |
8142 | break; | |
8143 | case PRAGMA_OMP_MASTER: | |
8144 | stmt = c_parser_omp_master (parser); | |
8145 | break; | |
8146 | case PRAGMA_OMP_ORDERED: | |
8147 | stmt = c_parser_omp_ordered (parser); | |
8148 | break; | |
8149 | case PRAGMA_OMP_PARALLEL: | |
8150 | stmt = c_parser_omp_parallel (parser); | |
8151 | break; | |
8152 | case PRAGMA_OMP_SECTIONS: | |
8153 | stmt = c_parser_omp_sections (parser); | |
8154 | break; | |
8155 | case PRAGMA_OMP_SINGLE: | |
8156 | stmt = c_parser_omp_single (parser); | |
8157 | break; | |
a68ab351 JJ |
8158 | case PRAGMA_OMP_TASK: |
8159 | stmt = c_parser_omp_task (parser); | |
8160 | break; | |
953ff289 DN |
8161 | default: |
8162 | gcc_unreachable (); | |
8163 | } | |
8164 | ||
8165 | if (stmt) | |
8166 | SET_EXPR_LOCATION (stmt, loc); | |
8167 | } | |
8168 | ||
8169 | ||
8170 | /* OpenMP 2.5: | |
8171 | # pragma omp threadprivate (variable-list) */ | |
8172 | ||
8173 | static void | |
8174 | c_parser_omp_threadprivate (c_parser *parser) | |
8175 | { | |
8176 | tree vars, t; | |
8177 | ||
8178 | c_parser_consume_pragma (parser); | |
d75d71e0 | 8179 | vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 | 8180 | |
953ff289 DN |
8181 | /* Mark every variable in VARS to be assigned thread local storage. */ |
8182 | for (t = vars; t; t = TREE_CHAIN (t)) | |
8183 | { | |
8184 | tree v = TREE_PURPOSE (t); | |
8185 | ||
8186 | /* If V had already been marked threadprivate, it doesn't matter | |
8187 | whether it had been used prior to this point. */ | |
5df27e4a JJ |
8188 | if (TREE_CODE (v) != VAR_DECL) |
8189 | error ("%qD is not a variable", v); | |
8190 | else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v)) | |
953ff289 DN |
8191 | error ("%qE declared %<threadprivate%> after first use", v); |
8192 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) | |
8193 | error ("automatic variable %qE cannot be %<threadprivate%>", v); | |
5df27e4a JJ |
8194 | else if (TREE_TYPE (v) == error_mark_node) |
8195 | ; | |
953ff289 DN |
8196 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) |
8197 | error ("%<threadprivate%> %qE has incomplete type", v); | |
8198 | else | |
8199 | { | |
8200 | if (! DECL_THREAD_LOCAL_P (v)) | |
8201 | { | |
8202 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
8203 | /* If rtl has been already set for this var, call | |
8204 | make_decl_rtl once again, so that encode_section_info | |
8205 | has a chance to look at the new decl flags. */ | |
8206 | if (DECL_RTL_SET_P (v)) | |
8207 | make_decl_rtl (v); | |
8208 | } | |
8209 | C_DECL_THREADPRIVATE_P (v) = 1; | |
8210 | } | |
8211 | } | |
8212 | ||
8213 | c_parser_skip_to_pragma_eol (parser); | |
8214 | } | |
8215 | ||
bc4071dd | 8216 | \f |
27bf414c JM |
8217 | /* Parse a single source file. */ |
8218 | ||
8219 | void | |
8220 | c_parse_file (void) | |
8221 | { | |
bc4071dd RH |
8222 | /* Use local storage to begin. If the first token is a pragma, parse it. |
8223 | If it is #pragma GCC pch_preprocess, then this will load a PCH file | |
8224 | which will cause garbage collection. */ | |
8225 | c_parser tparser; | |
8226 | ||
8227 | memset (&tparser, 0, sizeof tparser); | |
8228 | the_parser = &tparser; | |
8229 | ||
8230 | if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS) | |
8231 | c_parser_pragma_pch_preprocess (&tparser); | |
8232 | ||
8233 | the_parser = GGC_NEW (c_parser); | |
8234 | *the_parser = tparser; | |
8235 | ||
27bf414c JM |
8236 | c_parser_translation_unit (the_parser); |
8237 | the_parser = NULL; | |
8238 | } | |
8239 | ||
8240 | #include "gt-c-parser.h" |