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1576dec7 | 1 | /* Parser for C and Objective-C. |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
fdd84b77 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
50389d5d | 4 | Free Software Foundation, Inc. |
1576dec7 | 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 | |
8c4c00c1 | 13 | Software Foundation; either version 3, or (at your option) any later |
1576dec7 | 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 | |
8c4c00c1 | 22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
1576dec7 | 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" | |
115133dd | 43 | #include "tm.h" /* For rtl.h: needs enum reg_class. */ |
1576dec7 | 44 | #include "tree.h" |
45 | #include "langhooks.h" | |
46 | #include "input.h" | |
47 | #include "cpplib.h" | |
48 | #include "timevar.h" | |
7bedc3a0 | 49 | #include "c-family/c-pragma.h" |
1576dec7 | 50 | #include "c-tree.h" |
51 | #include "flags.h" | |
52 | #include "output.h" | |
1576dec7 | 53 | #include "ggc.h" |
7bedc3a0 | 54 | #include "c-family/c-common.h" |
6c536c4f | 55 | #include "c-family/c-objc.h" |
b75b98aa | 56 | #include "vec.h" |
57 | #include "target.h" | |
56af936e | 58 | #include "cgraph.h" |
9227b6fc | 59 | #include "plugin.h" |
1576dec7 | 60 | |
61 | \f | |
1576dec7 | 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; | |
5c6e5756 | 71 | int mask = 0; |
1576dec7 | 72 | |
6d5d708e | 73 | /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in |
74 | the c_token structure. */ | |
75 | gcc_assert (RID_MAX <= 255); | |
76 | ||
5c6e5756 | 77 | mask |= D_CXXONLY; |
78 | if (!flag_isoc99) | |
79 | mask |= D_C99; | |
80 | if (flag_no_asm) | |
81 | { | |
82 | mask |= D_ASM | D_EXT; | |
83 | if (!flag_isoc99) | |
84 | mask |= D_EXT89; | |
85 | } | |
1576dec7 | 86 | if (!c_dialect_objc ()) |
5c6e5756 | 87 | mask |= D_OBJC | D_CXX_OBJC; |
1576dec7 | 88 | |
ba72912a | 89 | ridpointers = ggc_alloc_cleared_vec_tree ((int) RID_MAX); |
5c6e5756 | 90 | for (i = 0; i < num_c_common_reswords; i++) |
1576dec7 | 91 | { |
92 | /* If a keyword is disabled, do not enter it into the table | |
93 | and so create a canonical spelling that isn't a keyword. */ | |
5c6e5756 | 94 | if (c_common_reswords[i].disable & mask) |
95 | { | |
96 | if (warn_cxx_compat | |
97 | && (c_common_reswords[i].disable & D_CXXWARN)) | |
98 | { | |
99 | id = get_identifier (c_common_reswords[i].word); | |
100 | C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN); | |
101 | C_IS_RESERVED_WORD (id) = 1; | |
102 | } | |
103 | continue; | |
104 | } | |
1576dec7 | 105 | |
5c6e5756 | 106 | id = get_identifier (c_common_reswords[i].word); |
107 | C_SET_RID_CODE (id, c_common_reswords[i].rid); | |
1576dec7 | 108 | C_IS_RESERVED_WORD (id) = 1; |
5c6e5756 | 109 | ridpointers [(int) c_common_reswords[i].rid] = id; |
1576dec7 | 110 | } |
111 | } | |
112 | \f | |
113 | /* The C lexer intermediates between the lexer in cpplib and c-lex.c | |
114 | and the C parser. Unlike the C++ lexer, the parser structure | |
115 | stores the lexer information instead of using a separate structure. | |
116 | Identifiers are separated into ordinary identifiers, type names, | |
117 | keywords and some other Objective-C types of identifiers, and some | |
118 | look-ahead is maintained. | |
119 | ||
120 | ??? It might be a good idea to lex the whole file up front (as for | |
121 | C++). It would then be possible to share more of the C and C++ | |
122 | lexer code, if desired. */ | |
123 | ||
124 | /* The following local token type is used. */ | |
125 | ||
126 | /* A keyword. */ | |
127 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
128 | ||
1576dec7 | 129 | /* More information about the type of a CPP_NAME token. */ |
130 | typedef enum c_id_kind { | |
131 | /* An ordinary identifier. */ | |
132 | C_ID_ID, | |
133 | /* An identifier declared as a typedef name. */ | |
134 | C_ID_TYPENAME, | |
135 | /* An identifier declared as an Objective-C class name. */ | |
136 | C_ID_CLASSNAME, | |
6d5d708e | 137 | /* An address space identifier. */ |
138 | C_ID_ADDRSPACE, | |
1576dec7 | 139 | /* Not an identifier. */ |
140 | C_ID_NONE | |
141 | } c_id_kind; | |
142 | ||
143 | /* A single C token after string literal concatenation and conversion | |
144 | of preprocessing tokens to tokens. */ | |
fb1e4f4a | 145 | typedef struct GTY (()) c_token { |
1576dec7 | 146 | /* The kind of token. */ |
147 | ENUM_BITFIELD (cpp_ttype) type : 8; | |
148 | /* If this token is a CPP_NAME, this value indicates whether also | |
149 | declared as some kind of type. Otherwise, it is C_ID_NONE. */ | |
150 | ENUM_BITFIELD (c_id_kind) id_kind : 8; | |
151 | /* If this token is a keyword, this value indicates which keyword. | |
152 | Otherwise, this value is RID_MAX. */ | |
153 | ENUM_BITFIELD (rid) keyword : 8; | |
b75b98aa | 154 | /* If this token is a CPP_PRAGMA, this indicates the pragma that |
155 | was seen. Otherwise it is PRAGMA_NONE. */ | |
a7bf9930 | 156 | ENUM_BITFIELD (pragma_kind) pragma_kind : 8; |
1576dec7 | 157 | /* The location at which this token was found. */ |
158 | location_t location; | |
561ba0aa | 159 | /* The value associated with this token, if any. */ |
160 | tree value; | |
1576dec7 | 161 | } c_token; |
162 | ||
163 | /* A parser structure recording information about the state and | |
164 | context of parsing. Includes lexer information with up to two | |
165 | tokens of look-ahead; more are not needed for C. */ | |
fb1e4f4a | 166 | typedef struct GTY(()) c_parser { |
1576dec7 | 167 | /* The look-ahead tokens. */ |
168 | c_token tokens[2]; | |
169 | /* How many look-ahead tokens are available (0, 1 or 2). */ | |
170 | short tokens_avail; | |
171 | /* True if a syntax error is being recovered from; false otherwise. | |
172 | c_parser_error sets this flag. It should clear this flag when | |
173 | enough tokens have been consumed to recover from the error. */ | |
174 | BOOL_BITFIELD error : 1; | |
b75b98aa | 175 | /* True if we're processing a pragma, and shouldn't automatically |
176 | consume CPP_PRAGMA_EOL. */ | |
177 | BOOL_BITFIELD in_pragma : 1; | |
10c93a35 | 178 | /* True if we're parsing the outermost block of an if statement. */ |
179 | BOOL_BITFIELD in_if_block : 1; | |
8115b8be | 180 | /* True if we want to lex an untranslated string. */ |
181 | BOOL_BITFIELD lex_untranslated_string : 1; | |
b27e241e | 182 | |
920d59b0 | 183 | /* Objective-C specific parser/lexer information. */ |
b27e241e | 184 | |
185 | /* True if we are in a context where the Objective-C "PQ" keywords | |
186 | are considered keywords. */ | |
920d59b0 | 187 | BOOL_BITFIELD objc_pq_context : 1; |
0a65c3bb | 188 | /* True if we are parsing a (potential) Objective-C foreach |
189 | statement. This is set to true after we parsed 'for (' and while | |
190 | we wait for 'in' or ';' to decide if it's a standard C for loop or an | |
191 | Objective-C foreach loop. */ | |
192 | BOOL_BITFIELD objc_could_be_foreach_context : 1; | |
920d59b0 | 193 | /* The following flag is needed to contextualize Objective-C lexical |
194 | analysis. In some cases (e.g., 'int NSObject;'), it is | |
195 | undesirable to bind an identifier to an Objective-C class, even | |
196 | if a class with that name exists. */ | |
197 | BOOL_BITFIELD objc_need_raw_identifier : 1; | |
86c110ac | 198 | /* True if we are in a context where the Objective-C "Property attribute" |
199 | keywords are valid. */ | |
200 | BOOL_BITFIELD objc_property_attr_context : 1; | |
1576dec7 | 201 | } c_parser; |
202 | ||
b75b98aa | 203 | |
204 | /* The actual parser and external interface. ??? Does this need to be | |
205 | garbage-collected? */ | |
206 | ||
207 | static GTY (()) c_parser *the_parser; | |
208 | ||
1576dec7 | 209 | /* Read in and lex a single token, storing it in *TOKEN. */ |
210 | ||
211 | static void | |
920d59b0 | 212 | c_lex_one_token (c_parser *parser, c_token *token) |
1576dec7 | 213 | { |
214 | timevar_push (TV_LEX); | |
b75b98aa | 215 | |
8115b8be | 216 | token->type = c_lex_with_flags (&token->value, &token->location, NULL, |
217 | (parser->lex_untranslated_string | |
218 | ? C_LEX_STRING_NO_TRANSLATE : 0)); | |
b75b98aa | 219 | token->id_kind = C_ID_NONE; |
220 | token->keyword = RID_MAX; | |
221 | token->pragma_kind = PRAGMA_NONE; | |
b75b98aa | 222 | |
1576dec7 | 223 | switch (token->type) |
224 | { | |
225 | case CPP_NAME: | |
1576dec7 | 226 | { |
227 | tree decl; | |
228 | ||
920d59b0 | 229 | bool objc_force_identifier = parser->objc_need_raw_identifier; |
230 | if (c_dialect_objc ()) | |
231 | parser->objc_need_raw_identifier = false; | |
1576dec7 | 232 | |
233 | if (C_IS_RESERVED_WORD (token->value)) | |
234 | { | |
235 | enum rid rid_code = C_RID_CODE (token->value); | |
236 | ||
5c6e5756 | 237 | if (rid_code == RID_CXX_COMPAT_WARN) |
238 | { | |
e3b80d49 | 239 | warning_at (token->location, |
240 | OPT_Wc___compat, | |
d1dd9ac0 | 241 | "identifier %qE conflicts with C++ keyword", |
242 | token->value); | |
5c6e5756 | 243 | } |
6d5d708e | 244 | else if (rid_code >= RID_FIRST_ADDR_SPACE |
245 | && rid_code <= RID_LAST_ADDR_SPACE) | |
246 | { | |
247 | token->id_kind = C_ID_ADDRSPACE; | |
248 | token->keyword = rid_code; | |
249 | break; | |
250 | } | |
b27e241e | 251 | else if (c_dialect_objc () && OBJC_IS_PQ_KEYWORD (rid_code)) |
1576dec7 | 252 | { |
b27e241e | 253 | /* We found an Objective-C "pq" keyword (in, out, |
254 | inout, bycopy, byref, oneway). They need special | |
255 | care because the interpretation depends on the | |
ffbb3d61 | 256 | context. */ |
b27e241e | 257 | if (parser->objc_pq_context) |
1576dec7 | 258 | { |
1576dec7 | 259 | token->type = CPP_KEYWORD; |
260 | token->keyword = rid_code; | |
261 | break; | |
262 | } | |
0a65c3bb | 263 | else if (parser->objc_could_be_foreach_context |
264 | && rid_code == RID_IN) | |
265 | { | |
266 | /* We are in Objective-C, inside a (potential) | |
267 | foreach context (which means after having | |
268 | parsed 'for (', but before having parsed ';'), | |
269 | and we found 'in'. We consider it the keyword | |
270 | which terminates the declaration at the | |
271 | beginning of a foreach-statement. Note that | |
272 | this means you can't use 'in' for anything else | |
273 | in that context; in particular, in Objective-C | |
274 | you can't use 'in' as the name of the running | |
275 | variable in a C for loop. We could potentially | |
276 | try to add code here to disambiguate, but it | |
ffbb3d61 | 277 | seems a reasonable limitation. */ |
0a65c3bb | 278 | token->type = CPP_KEYWORD; |
279 | token->keyword = rid_code; | |
280 | break; | |
281 | } | |
b27e241e | 282 | /* Else, "pq" keywords outside of the "pq" context are |
283 | not keywords, and we fall through to the code for | |
ffbb3d61 | 284 | normal tokens. */ |
b27e241e | 285 | } |
86c110ac | 286 | else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code)) |
287 | { | |
ffbb3d61 | 288 | /* We found an Objective-C "property attribute" |
289 | keyword (getter, setter, readonly, etc). These are | |
86c110ac | 290 | only valid in the property context. */ |
291 | if (parser->objc_property_attr_context) | |
292 | { | |
293 | token->type = CPP_KEYWORD; | |
294 | token->keyword = rid_code; | |
295 | break; | |
296 | } | |
297 | /* Else they are not special keywords. | |
298 | */ | |
299 | } | |
b27e241e | 300 | else if (c_dialect_objc () |
301 | && (OBJC_IS_AT_KEYWORD (rid_code) | |
302 | || OBJC_IS_CXX_KEYWORD (rid_code))) | |
303 | { | |
304 | /* We found one of the Objective-C "@" keywords (defs, | |
305 | selector, synchronized, etc) or one of the | |
306 | Objective-C "cxx" keywords (class, private, | |
307 | protected, public, try, catch, throw) without a | |
308 | preceding '@' sign. Do nothing and fall through to | |
309 | the code for normal tokens (in C++ we would still | |
ffbb3d61 | 310 | consider the CXX ones keywords, but not in C). */ |
b27e241e | 311 | ; |
1576dec7 | 312 | } |
313 | else | |
314 | { | |
1576dec7 | 315 | token->type = CPP_KEYWORD; |
316 | token->keyword = rid_code; | |
317 | break; | |
318 | } | |
319 | } | |
320 | ||
321 | decl = lookup_name (token->value); | |
322 | if (decl) | |
323 | { | |
324 | if (TREE_CODE (decl) == TYPE_DECL) | |
325 | { | |
326 | token->id_kind = C_ID_TYPENAME; | |
327 | break; | |
328 | } | |
329 | } | |
330 | else if (c_dialect_objc ()) | |
331 | { | |
332 | tree objc_interface_decl = objc_is_class_name (token->value); | |
333 | /* Objective-C class names are in the same namespace as | |
334 | variables and typedefs, and hence are shadowed by local | |
335 | declarations. */ | |
336 | if (objc_interface_decl | |
05ca272f | 337 | && (!objc_force_identifier || global_bindings_p ())) |
1576dec7 | 338 | { |
339 | token->value = objc_interface_decl; | |
340 | token->id_kind = C_ID_CLASSNAME; | |
341 | break; | |
342 | } | |
343 | } | |
b75b98aa | 344 | token->id_kind = C_ID_ID; |
1576dec7 | 345 | } |
1576dec7 | 346 | break; |
347 | case CPP_AT_NAME: | |
348 | /* This only happens in Objective-C; it must be a keyword. */ | |
349 | token->type = CPP_KEYWORD; | |
e5c75ac3 | 350 | switch (C_RID_CODE (token->value)) |
351 | { | |
352 | /* Replace 'class' with '@class', 'private' with '@private', | |
353 | etc. This prevents confusion with the C++ keyword | |
354 | 'class', and makes the tokens consistent with other | |
355 | Objective-C 'AT' keywords. For example '@class' is | |
356 | reported as RID_AT_CLASS which is consistent with | |
357 | '@synchronized', which is reported as | |
358 | RID_AT_SYNCHRONIZED. | |
359 | */ | |
360 | case RID_CLASS: token->keyword = RID_AT_CLASS; break; | |
361 | case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break; | |
362 | case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break; | |
363 | case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break; | |
364 | case RID_THROW: token->keyword = RID_AT_THROW; break; | |
365 | case RID_TRY: token->keyword = RID_AT_TRY; break; | |
366 | case RID_CATCH: token->keyword = RID_AT_CATCH; break; | |
367 | default: token->keyword = C_RID_CODE (token->value); | |
368 | } | |
1576dec7 | 369 | break; |
370 | case CPP_COLON: | |
371 | case CPP_COMMA: | |
372 | case CPP_CLOSE_PAREN: | |
373 | case CPP_SEMICOLON: | |
374 | /* These tokens may affect the interpretation of any identifiers | |
375 | following, if doing Objective-C. */ | |
920d59b0 | 376 | if (c_dialect_objc ()) |
377 | parser->objc_need_raw_identifier = false; | |
b75b98aa | 378 | break; |
379 | case CPP_PRAGMA: | |
380 | /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */ | |
7d339f93 | 381 | token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value); |
b75b98aa | 382 | token->value = NULL; |
1576dec7 | 383 | break; |
384 | default: | |
1576dec7 | 385 | break; |
386 | } | |
387 | timevar_pop (TV_LEX); | |
388 | } | |
389 | ||
390 | /* Return a pointer to the next token from PARSER, reading it in if | |
391 | necessary. */ | |
392 | ||
393 | static inline c_token * | |
394 | c_parser_peek_token (c_parser *parser) | |
395 | { | |
396 | if (parser->tokens_avail == 0) | |
397 | { | |
920d59b0 | 398 | c_lex_one_token (parser, &parser->tokens[0]); |
1576dec7 | 399 | parser->tokens_avail = 1; |
400 | } | |
401 | return &parser->tokens[0]; | |
402 | } | |
403 | ||
404 | /* Return true if the next token from PARSER has the indicated | |
405 | TYPE. */ | |
406 | ||
407 | static inline bool | |
408 | c_parser_next_token_is (c_parser *parser, enum cpp_ttype type) | |
409 | { | |
410 | return c_parser_peek_token (parser)->type == type; | |
411 | } | |
412 | ||
413 | /* Return true if the next token from PARSER does not have the | |
414 | indicated TYPE. */ | |
415 | ||
416 | static inline bool | |
417 | c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type) | |
418 | { | |
419 | return !c_parser_next_token_is (parser, type); | |
420 | } | |
421 | ||
422 | /* Return true if the next token from PARSER is the indicated | |
423 | KEYWORD. */ | |
424 | ||
425 | static inline bool | |
426 | c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword) | |
427 | { | |
b3cafa91 | 428 | return c_parser_peek_token (parser)->keyword == keyword; |
1576dec7 | 429 | } |
430 | ||
26ee9e7a | 431 | /* Return a pointer to the next-but-one token from PARSER, reading it |
432 | in if necessary. The next token is already read in. */ | |
433 | ||
434 | static c_token * | |
435 | c_parser_peek_2nd_token (c_parser *parser) | |
436 | { | |
437 | if (parser->tokens_avail >= 2) | |
438 | return &parser->tokens[1]; | |
439 | gcc_assert (parser->tokens_avail == 1); | |
440 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
441 | gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL); | |
442 | c_lex_one_token (parser, &parser->tokens[1]); | |
443 | parser->tokens_avail = 2; | |
444 | return &parser->tokens[1]; | |
445 | } | |
446 | ||
1576dec7 | 447 | /* Return true if TOKEN can start a type name, |
448 | false otherwise. */ | |
449 | static bool | |
450 | c_token_starts_typename (c_token *token) | |
451 | { | |
452 | switch (token->type) | |
453 | { | |
454 | case CPP_NAME: | |
455 | switch (token->id_kind) | |
456 | { | |
457 | case C_ID_ID: | |
458 | return false; | |
6d5d708e | 459 | case C_ID_ADDRSPACE: |
460 | return true; | |
1576dec7 | 461 | case C_ID_TYPENAME: |
462 | return true; | |
463 | case C_ID_CLASSNAME: | |
464 | gcc_assert (c_dialect_objc ()); | |
465 | return true; | |
466 | default: | |
467 | gcc_unreachable (); | |
468 | } | |
469 | case CPP_KEYWORD: | |
470 | switch (token->keyword) | |
471 | { | |
472 | case RID_UNSIGNED: | |
473 | case RID_LONG: | |
6388cfe2 | 474 | case RID_INT128: |
1576dec7 | 475 | case RID_SHORT: |
476 | case RID_SIGNED: | |
477 | case RID_COMPLEX: | |
478 | case RID_INT: | |
479 | case RID_CHAR: | |
480 | case RID_FLOAT: | |
481 | case RID_DOUBLE: | |
482 | case RID_VOID: | |
c4503c0a | 483 | case RID_DFLOAT32: |
484 | case RID_DFLOAT64: | |
485 | case RID_DFLOAT128: | |
1576dec7 | 486 | case RID_BOOL: |
487 | case RID_ENUM: | |
488 | case RID_STRUCT: | |
489 | case RID_UNION: | |
490 | case RID_TYPEOF: | |
491 | case RID_CONST: | |
492 | case RID_VOLATILE: | |
493 | case RID_RESTRICT: | |
494 | case RID_ATTRIBUTE: | |
9421ebb9 | 495 | case RID_FRACT: |
496 | case RID_ACCUM: | |
497 | case RID_SAT: | |
1576dec7 | 498 | return true; |
499 | default: | |
500 | return false; | |
501 | } | |
502 | case CPP_LESS: | |
503 | if (c_dialect_objc ()) | |
504 | return true; | |
505 | return false; | |
506 | default: | |
507 | return false; | |
508 | } | |
509 | } | |
510 | ||
26ee9e7a | 511 | enum c_lookahead_kind { |
512 | /* Always treat unknown identifiers as typenames. */ | |
513 | cla_prefer_type, | |
514 | ||
515 | /* Could be parsing a nonabstract declarator. Only treat an identifier | |
516 | as a typename if followed by another identifier or a star. */ | |
517 | cla_nonabstract_decl, | |
518 | ||
519 | /* Never treat identifiers as typenames. */ | |
520 | cla_prefer_id | |
521 | }; | |
522 | ||
1576dec7 | 523 | /* Return true if the next token from PARSER can start a type name, |
26ee9e7a | 524 | false otherwise. LA specifies how to do lookahead in order to |
525 | detect unknown type names. If unsure, pick CLA_PREFER_ID. */ | |
526 | ||
1576dec7 | 527 | static inline bool |
26ee9e7a | 528 | c_parser_next_tokens_start_typename (c_parser *parser, enum c_lookahead_kind la) |
1576dec7 | 529 | { |
530 | c_token *token = c_parser_peek_token (parser); | |
26ee9e7a | 531 | if (c_token_starts_typename (token)) |
532 | return true; | |
533 | ||
534 | /* Try a bit harder to detect an unknown typename. */ | |
535 | if (la != cla_prefer_id | |
536 | && token->type == CPP_NAME | |
537 | && token->id_kind == C_ID_ID | |
538 | ||
539 | /* Do not try too hard when we could have "object in array". */ | |
540 | && !parser->objc_could_be_foreach_context | |
541 | ||
542 | && (la == cla_prefer_type | |
543 | || c_parser_peek_2nd_token (parser)->type == CPP_NAME | |
544 | || c_parser_peek_2nd_token (parser)->type == CPP_MULT) | |
545 | ||
546 | /* Only unknown identifiers. */ | |
547 | && !lookup_name (token->value)) | |
548 | return true; | |
549 | ||
550 | return false; | |
1576dec7 | 551 | } |
552 | ||
b02d8973 | 553 | /* Return true if TOKEN is a type qualifier, false otherwise. */ |
554 | static bool | |
555 | c_token_is_qualifier (c_token *token) | |
556 | { | |
557 | switch (token->type) | |
558 | { | |
559 | case CPP_NAME: | |
560 | switch (token->id_kind) | |
561 | { | |
562 | case C_ID_ADDRSPACE: | |
563 | return true; | |
564 | default: | |
565 | return false; | |
566 | } | |
567 | case CPP_KEYWORD: | |
568 | switch (token->keyword) | |
569 | { | |
570 | case RID_CONST: | |
571 | case RID_VOLATILE: | |
572 | case RID_RESTRICT: | |
573 | case RID_ATTRIBUTE: | |
574 | return true; | |
575 | default: | |
576 | return false; | |
577 | } | |
578 | case CPP_LESS: | |
579 | return false; | |
580 | default: | |
581 | gcc_unreachable (); | |
582 | } | |
583 | } | |
584 | ||
585 | /* Return true if the next token from PARSER is a type qualifier, | |
586 | false otherwise. */ | |
587 | static inline bool | |
588 | c_parser_next_token_is_qualifier (c_parser *parser) | |
589 | { | |
590 | c_token *token = c_parser_peek_token (parser); | |
591 | return c_token_is_qualifier (token); | |
592 | } | |
593 | ||
1576dec7 | 594 | /* Return true if TOKEN can start declaration specifiers, false |
595 | otherwise. */ | |
596 | static bool | |
597 | c_token_starts_declspecs (c_token *token) | |
598 | { | |
599 | switch (token->type) | |
600 | { | |
601 | case CPP_NAME: | |
602 | switch (token->id_kind) | |
603 | { | |
604 | case C_ID_ID: | |
605 | return false; | |
6d5d708e | 606 | case C_ID_ADDRSPACE: |
607 | return true; | |
1576dec7 | 608 | case C_ID_TYPENAME: |
609 | return true; | |
610 | case C_ID_CLASSNAME: | |
611 | gcc_assert (c_dialect_objc ()); | |
612 | return true; | |
613 | default: | |
614 | gcc_unreachable (); | |
615 | } | |
616 | case CPP_KEYWORD: | |
617 | switch (token->keyword) | |
618 | { | |
619 | case RID_STATIC: | |
620 | case RID_EXTERN: | |
621 | case RID_REGISTER: | |
622 | case RID_TYPEDEF: | |
623 | case RID_INLINE: | |
985c6e3a | 624 | case RID_NORETURN: |
1576dec7 | 625 | case RID_AUTO: |
626 | case RID_THREAD: | |
627 | case RID_UNSIGNED: | |
628 | case RID_LONG: | |
6388cfe2 | 629 | case RID_INT128: |
1576dec7 | 630 | case RID_SHORT: |
631 | case RID_SIGNED: | |
632 | case RID_COMPLEX: | |
633 | case RID_INT: | |
634 | case RID_CHAR: | |
635 | case RID_FLOAT: | |
636 | case RID_DOUBLE: | |
637 | case RID_VOID: | |
c4503c0a | 638 | case RID_DFLOAT32: |
639 | case RID_DFLOAT64: | |
640 | case RID_DFLOAT128: | |
1576dec7 | 641 | case RID_BOOL: |
642 | case RID_ENUM: | |
643 | case RID_STRUCT: | |
644 | case RID_UNION: | |
645 | case RID_TYPEOF: | |
646 | case RID_CONST: | |
647 | case RID_VOLATILE: | |
648 | case RID_RESTRICT: | |
649 | case RID_ATTRIBUTE: | |
9421ebb9 | 650 | case RID_FRACT: |
651 | case RID_ACCUM: | |
652 | case RID_SAT: | |
83e25171 | 653 | case RID_ALIGNAS: |
1576dec7 | 654 | return true; |
655 | default: | |
656 | return false; | |
657 | } | |
658 | case CPP_LESS: | |
659 | if (c_dialect_objc ()) | |
660 | return true; | |
661 | return false; | |
662 | default: | |
663 | return false; | |
664 | } | |
665 | } | |
666 | ||
f80e7755 | 667 | |
668 | /* Return true if TOKEN can start declaration specifiers or a static | |
669 | assertion, false otherwise. */ | |
670 | static bool | |
671 | c_token_starts_declaration (c_token *token) | |
672 | { | |
673 | if (c_token_starts_declspecs (token) | |
674 | || token->keyword == RID_STATIC_ASSERT) | |
675 | return true; | |
676 | else | |
677 | return false; | |
678 | } | |
679 | ||
1576dec7 | 680 | /* Return true if the next token from PARSER can start declaration |
681 | specifiers, false otherwise. */ | |
682 | static inline bool | |
683 | c_parser_next_token_starts_declspecs (c_parser *parser) | |
684 | { | |
685 | c_token *token = c_parser_peek_token (parser); | |
b0d0931f | 686 | |
687 | /* In Objective-C, a classname normally starts a declspecs unless it | |
688 | is immediately followed by a dot. In that case, it is the | |
689 | Objective-C 2.0 "dot-syntax" for class objects, ie, calls the | |
690 | setter/getter on the class. c_token_starts_declspecs() can't | |
691 | differentiate between the two cases because it only checks the | |
692 | current token, so we have a special check here. */ | |
693 | if (c_dialect_objc () | |
694 | && token->type == CPP_NAME | |
695 | && token->id_kind == C_ID_CLASSNAME | |
696 | && c_parser_peek_2nd_token (parser)->type == CPP_DOT) | |
697 | return false; | |
698 | ||
1576dec7 | 699 | return c_token_starts_declspecs (token); |
700 | } | |
701 | ||
71bb4bc6 | 702 | /* Return true if the next tokens from PARSER can start declaration |
f80e7755 | 703 | specifiers or a static assertion, false otherwise. */ |
704 | static inline bool | |
71bb4bc6 | 705 | c_parser_next_tokens_start_declaration (c_parser *parser) |
f80e7755 | 706 | { |
707 | c_token *token = c_parser_peek_token (parser); | |
b0d0931f | 708 | |
709 | /* Same as above. */ | |
710 | if (c_dialect_objc () | |
711 | && token->type == CPP_NAME | |
712 | && token->id_kind == C_ID_CLASSNAME | |
713 | && c_parser_peek_2nd_token (parser)->type == CPP_DOT) | |
714 | return false; | |
715 | ||
71bb4bc6 | 716 | /* Labels do not start declarations. */ |
717 | if (token->type == CPP_NAME | |
718 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
719 | return false; | |
720 | ||
721 | if (c_token_starts_declaration (token)) | |
722 | return true; | |
723 | ||
26ee9e7a | 724 | if (c_parser_next_tokens_start_typename (parser, cla_nonabstract_decl)) |
71bb4bc6 | 725 | return true; |
726 | ||
727 | return false; | |
f80e7755 | 728 | } |
729 | ||
1576dec7 | 730 | /* Consume the next token from PARSER. */ |
731 | ||
732 | static void | |
733 | c_parser_consume_token (c_parser *parser) | |
734 | { | |
b75b98aa | 735 | gcc_assert (parser->tokens_avail >= 1); |
736 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
737 | gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL); | |
738 | gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA); | |
1576dec7 | 739 | if (parser->tokens_avail == 2) |
740 | parser->tokens[0] = parser->tokens[1]; | |
1576dec7 | 741 | parser->tokens_avail--; |
742 | } | |
743 | ||
b75b98aa | 744 | /* Expect the current token to be a #pragma. Consume it and remember |
745 | that we've begun parsing a pragma. */ | |
746 | ||
747 | static void | |
748 | c_parser_consume_pragma (c_parser *parser) | |
749 | { | |
750 | gcc_assert (!parser->in_pragma); | |
751 | gcc_assert (parser->tokens_avail >= 1); | |
752 | gcc_assert (parser->tokens[0].type == CPP_PRAGMA); | |
753 | if (parser->tokens_avail == 2) | |
754 | parser->tokens[0] = parser->tokens[1]; | |
755 | parser->tokens_avail--; | |
756 | parser->in_pragma = true; | |
757 | } | |
758 | ||
1576dec7 | 759 | /* Update the globals input_location and in_system_header from |
760 | TOKEN. */ | |
761 | static inline void | |
762 | c_parser_set_source_position_from_token (c_token *token) | |
763 | { | |
764 | if (token->type != CPP_EOF) | |
765 | { | |
766 | input_location = token->location; | |
1576dec7 | 767 | } |
768 | } | |
769 | ||
1576dec7 | 770 | /* Issue a diagnostic of the form |
771 | FILE:LINE: MESSAGE before TOKEN | |
772 | where TOKEN is the next token in the input stream of PARSER. | |
773 | MESSAGE (specified by the caller) is usually of the form "expected | |
774 | OTHER-TOKEN". | |
775 | ||
776 | Do not issue a diagnostic if still recovering from an error. | |
777 | ||
778 | ??? This is taken from the C++ parser, but building up messages in | |
779 | this way is not i18n-friendly and some other approach should be | |
780 | used. */ | |
781 | ||
782 | static void | |
380c6697 | 783 | c_parser_error (c_parser *parser, const char *gmsgid) |
1576dec7 | 784 | { |
785 | c_token *token = c_parser_peek_token (parser); | |
786 | if (parser->error) | |
787 | return; | |
788 | parser->error = true; | |
380c6697 | 789 | if (!gmsgid) |
1576dec7 | 790 | return; |
791 | /* This diagnostic makes more sense if it is tagged to the line of | |
792 | the token we just peeked at. */ | |
793 | c_parser_set_source_position_from_token (token); | |
380c6697 | 794 | c_parse_error (gmsgid, |
1576dec7 | 795 | /* Because c_parse_error does not understand |
796 | CPP_KEYWORD, keywords are treated like | |
797 | identifiers. */ | |
798 | (token->type == CPP_KEYWORD ? CPP_NAME : token->type), | |
ba99525e | 799 | /* ??? The C parser does not save the cpp flags of a |
800 | token, we need to pass 0 here and we will not get | |
801 | the source spelling of some tokens but rather the | |
802 | canonical spelling. */ | |
803 | token->value, /*flags=*/0); | |
1576dec7 | 804 | } |
805 | ||
806 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
807 | issue the error MSGID. If MSGID is NULL then a message has already | |
808 | been produced and no message will be produced this time. Returns | |
809 | true if found, false otherwise. */ | |
810 | ||
811 | static bool | |
812 | c_parser_require (c_parser *parser, | |
813 | enum cpp_ttype type, | |
814 | const char *msgid) | |
815 | { | |
816 | if (c_parser_next_token_is (parser, type)) | |
817 | { | |
818 | c_parser_consume_token (parser); | |
819 | return true; | |
820 | } | |
821 | else | |
822 | { | |
823 | c_parser_error (parser, msgid); | |
824 | return false; | |
825 | } | |
826 | } | |
827 | ||
828 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
829 | issue the error MSGID. Returns true if found, false otherwise. */ | |
830 | ||
831 | static bool | |
832 | c_parser_require_keyword (c_parser *parser, | |
833 | enum rid keyword, | |
834 | const char *msgid) | |
835 | { | |
836 | if (c_parser_next_token_is_keyword (parser, keyword)) | |
837 | { | |
838 | c_parser_consume_token (parser); | |
839 | return true; | |
840 | } | |
841 | else | |
842 | { | |
843 | c_parser_error (parser, msgid); | |
844 | return false; | |
845 | } | |
846 | } | |
847 | ||
848 | /* Like c_parser_require, except that tokens will be skipped until the | |
849 | desired token is found. An error message is still produced if the | |
850 | next token is not as expected. If MSGID is NULL then a message has | |
851 | already been produced and no message will be produced this | |
852 | time. */ | |
853 | ||
854 | static void | |
855 | c_parser_skip_until_found (c_parser *parser, | |
856 | enum cpp_ttype type, | |
857 | const char *msgid) | |
858 | { | |
859 | unsigned nesting_depth = 0; | |
860 | ||
861 | if (c_parser_require (parser, type, msgid)) | |
862 | return; | |
863 | ||
864 | /* Skip tokens until the desired token is found. */ | |
865 | while (true) | |
866 | { | |
867 | /* Peek at the next token. */ | |
868 | c_token *token = c_parser_peek_token (parser); | |
869 | /* If we've reached the token we want, consume it and stop. */ | |
870 | if (token->type == type && !nesting_depth) | |
871 | { | |
872 | c_parser_consume_token (parser); | |
873 | break; | |
874 | } | |
b75b98aa | 875 | |
1576dec7 | 876 | /* If we've run out of tokens, stop. */ |
877 | if (token->type == CPP_EOF) | |
878 | return; | |
b75b98aa | 879 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
880 | return; | |
1576dec7 | 881 | if (token->type == CPP_OPEN_BRACE |
882 | || token->type == CPP_OPEN_PAREN | |
883 | || token->type == CPP_OPEN_SQUARE) | |
884 | ++nesting_depth; | |
885 | else if (token->type == CPP_CLOSE_BRACE | |
886 | || token->type == CPP_CLOSE_PAREN | |
887 | || token->type == CPP_CLOSE_SQUARE) | |
888 | { | |
889 | if (nesting_depth-- == 0) | |
890 | break; | |
891 | } | |
892 | /* Consume this token. */ | |
893 | c_parser_consume_token (parser); | |
894 | } | |
895 | parser->error = false; | |
896 | } | |
897 | ||
898 | /* Skip tokens until the end of a parameter is found, but do not | |
899 | consume the comma, semicolon or closing delimiter. */ | |
900 | ||
901 | static void | |
902 | c_parser_skip_to_end_of_parameter (c_parser *parser) | |
903 | { | |
904 | unsigned nesting_depth = 0; | |
905 | ||
906 | while (true) | |
907 | { | |
908 | c_token *token = c_parser_peek_token (parser); | |
909 | if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON) | |
910 | && !nesting_depth) | |
911 | break; | |
912 | /* If we've run out of tokens, stop. */ | |
913 | if (token->type == CPP_EOF) | |
914 | return; | |
b75b98aa | 915 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
916 | return; | |
1576dec7 | 917 | if (token->type == CPP_OPEN_BRACE |
918 | || token->type == CPP_OPEN_PAREN | |
919 | || token->type == CPP_OPEN_SQUARE) | |
920 | ++nesting_depth; | |
921 | else if (token->type == CPP_CLOSE_BRACE | |
922 | || token->type == CPP_CLOSE_PAREN | |
923 | || token->type == CPP_CLOSE_SQUARE) | |
924 | { | |
925 | if (nesting_depth-- == 0) | |
926 | break; | |
927 | } | |
928 | /* Consume this token. */ | |
929 | c_parser_consume_token (parser); | |
930 | } | |
931 | parser->error = false; | |
932 | } | |
933 | ||
b75b98aa | 934 | /* Expect to be at the end of the pragma directive and consume an |
935 | end of line marker. */ | |
936 | ||
937 | static void | |
938 | c_parser_skip_to_pragma_eol (c_parser *parser) | |
939 | { | |
940 | gcc_assert (parser->in_pragma); | |
941 | parser->in_pragma = false; | |
942 | ||
943 | if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line")) | |
944 | while (true) | |
945 | { | |
946 | c_token *token = c_parser_peek_token (parser); | |
947 | if (token->type == CPP_EOF) | |
948 | break; | |
949 | if (token->type == CPP_PRAGMA_EOL) | |
950 | { | |
951 | c_parser_consume_token (parser); | |
952 | break; | |
953 | } | |
954 | c_parser_consume_token (parser); | |
955 | } | |
956 | ||
957 | parser->error = false; | |
958 | } | |
1576dec7 | 959 | |
adcd0e5f | 960 | /* Skip tokens until we have consumed an entire block, or until we |
961 | have consumed a non-nested ';'. */ | |
962 | ||
963 | static void | |
964 | c_parser_skip_to_end_of_block_or_statement (c_parser *parser) | |
965 | { | |
966 | unsigned nesting_depth = 0; | |
967 | bool save_error = parser->error; | |
968 | ||
969 | while (true) | |
970 | { | |
971 | c_token *token; | |
972 | ||
973 | /* Peek at the next token. */ | |
974 | token = c_parser_peek_token (parser); | |
975 | ||
976 | switch (token->type) | |
977 | { | |
978 | case CPP_EOF: | |
979 | return; | |
980 | ||
981 | case CPP_PRAGMA_EOL: | |
982 | if (parser->in_pragma) | |
983 | return; | |
984 | break; | |
985 | ||
986 | case CPP_SEMICOLON: | |
987 | /* If the next token is a ';', we have reached the | |
988 | end of the statement. */ | |
989 | if (!nesting_depth) | |
990 | { | |
991 | /* Consume the ';'. */ | |
992 | c_parser_consume_token (parser); | |
993 | goto finished; | |
994 | } | |
995 | break; | |
996 | ||
997 | case CPP_CLOSE_BRACE: | |
998 | /* If the next token is a non-nested '}', then we have | |
999 | reached the end of the current block. */ | |
1000 | if (nesting_depth == 0 || --nesting_depth == 0) | |
1001 | { | |
1002 | c_parser_consume_token (parser); | |
1003 | goto finished; | |
1004 | } | |
1005 | break; | |
1006 | ||
1007 | case CPP_OPEN_BRACE: | |
1008 | /* If it the next token is a '{', then we are entering a new | |
1009 | block. Consume the entire block. */ | |
1010 | ++nesting_depth; | |
1011 | break; | |
1012 | ||
1013 | case CPP_PRAGMA: | |
1014 | /* If we see a pragma, consume the whole thing at once. We | |
1015 | have some safeguards against consuming pragmas willy-nilly. | |
1016 | Normally, we'd expect to be here with parser->error set, | |
1017 | which disables these safeguards. But it's possible to get | |
1018 | here for secondary error recovery, after parser->error has | |
1019 | been cleared. */ | |
1020 | c_parser_consume_pragma (parser); | |
1021 | c_parser_skip_to_pragma_eol (parser); | |
1022 | parser->error = save_error; | |
1023 | continue; | |
3ab72ef0 | 1024 | |
1025 | default: | |
1026 | break; | |
adcd0e5f | 1027 | } |
1028 | ||
1029 | c_parser_consume_token (parser); | |
1030 | } | |
1031 | ||
1032 | finished: | |
1033 | parser->error = false; | |
1034 | } | |
1035 | ||
caefd295 | 1036 | /* CPP's options (initialized by c-opts.c). */ |
1037 | extern cpp_options *cpp_opts; | |
1038 | ||
1576dec7 | 1039 | /* Save the warning flags which are controlled by __extension__. */ |
1040 | ||
1041 | static inline int | |
1042 | disable_extension_diagnostics (void) | |
1043 | { | |
1044 | int ret = (pedantic | |
1045 | | (warn_pointer_arith << 1) | |
1046 | | (warn_traditional << 2) | |
caefd295 | 1047 | | (flag_iso << 3) |
0b09525f | 1048 | | (warn_long_long << 4) |
4e9eacab | 1049 | | (warn_cxx_compat << 5) |
1050 | | (warn_overlength_strings << 6)); | |
5ae82d58 | 1051 | cpp_opts->cpp_pedantic = pedantic = 0; |
1576dec7 | 1052 | warn_pointer_arith = 0; |
5ae82d58 | 1053 | cpp_opts->cpp_warn_traditional = warn_traditional = 0; |
1576dec7 | 1054 | flag_iso = 0; |
5ae82d58 | 1055 | cpp_opts->cpp_warn_long_long = warn_long_long = 0; |
0b09525f | 1056 | warn_cxx_compat = 0; |
4e9eacab | 1057 | warn_overlength_strings = 0; |
1576dec7 | 1058 | return ret; |
1059 | } | |
1060 | ||
1061 | /* Restore the warning flags which are controlled by __extension__. | |
1062 | FLAGS is the return value from disable_extension_diagnostics. */ | |
1063 | ||
1064 | static inline void | |
1065 | restore_extension_diagnostics (int flags) | |
1066 | { | |
5ae82d58 | 1067 | cpp_opts->cpp_pedantic = pedantic = flags & 1; |
1576dec7 | 1068 | warn_pointer_arith = (flags >> 1) & 1; |
5ae82d58 | 1069 | cpp_opts->cpp_warn_traditional = warn_traditional = (flags >> 2) & 1; |
1576dec7 | 1070 | flag_iso = (flags >> 3) & 1; |
5ae82d58 | 1071 | cpp_opts->cpp_warn_long_long = warn_long_long = (flags >> 4) & 1; |
0b09525f | 1072 | warn_cxx_compat = (flags >> 5) & 1; |
4e9eacab | 1073 | warn_overlength_strings = (flags >> 6) & 1; |
1576dec7 | 1074 | } |
1075 | ||
1076 | /* Possibly kinds of declarator to parse. */ | |
1077 | typedef enum c_dtr_syn { | |
1078 | /* A normal declarator with an identifier. */ | |
1079 | C_DTR_NORMAL, | |
1080 | /* An abstract declarator (maybe empty). */ | |
1081 | C_DTR_ABSTRACT, | |
1082 | /* A parameter declarator: may be either, but after a type name does | |
1083 | not redeclare a typedef name as an identifier if it can | |
1084 | alternatively be interpreted as a typedef name; see DR#009, | |
1085 | applied in C90 TC1, omitted from C99 and reapplied in C99 TC2 | |
1086 | following DR#249. For example, given a typedef T, "int T" and | |
1087 | "int *T" are valid parameter declarations redeclaring T, while | |
1088 | "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are | |
1089 | abstract declarators rather than involving redundant parentheses; | |
1090 | the same applies with attributes inside the parentheses before | |
1091 | "T". */ | |
1092 | C_DTR_PARM | |
1093 | } c_dtr_syn; | |
1094 | ||
2169f33b | 1095 | /* The binary operation precedence levels, where 0 is a dummy lowest level |
1096 | used for the bottom of the stack. */ | |
1097 | enum c_parser_prec { | |
1098 | PREC_NONE, | |
1099 | PREC_LOGOR, | |
1100 | PREC_LOGAND, | |
1101 | PREC_BITOR, | |
1102 | PREC_BITXOR, | |
1103 | PREC_BITAND, | |
1104 | PREC_EQ, | |
1105 | PREC_REL, | |
1106 | PREC_SHIFT, | |
1107 | PREC_ADD, | |
1108 | PREC_MULT, | |
1109 | NUM_PRECS | |
1110 | }; | |
1111 | ||
1576dec7 | 1112 | static void c_parser_external_declaration (c_parser *); |
1113 | static void c_parser_asm_definition (c_parser *); | |
f80e7755 | 1114 | static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, |
0a65c3bb | 1115 | bool, bool, tree *); |
f80e7755 | 1116 | static void c_parser_static_assert_declaration_no_semi (c_parser *); |
1117 | static void c_parser_static_assert_declaration (c_parser *); | |
1576dec7 | 1118 | static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool, |
26ee9e7a | 1119 | bool, enum c_lookahead_kind); |
1576dec7 | 1120 | static struct c_typespec c_parser_enum_specifier (c_parser *); |
1121 | static struct c_typespec c_parser_struct_or_union_specifier (c_parser *); | |
1122 | static tree c_parser_struct_declaration (c_parser *); | |
1123 | static struct c_typespec c_parser_typeof_specifier (c_parser *); | |
83e25171 | 1124 | static tree c_parser_alignas_specifier (c_parser *); |
1576dec7 | 1125 | static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn, |
1126 | bool *); | |
1127 | static struct c_declarator *c_parser_direct_declarator (c_parser *, bool, | |
1128 | c_dtr_syn, bool *); | |
1129 | static struct c_declarator *c_parser_direct_declarator_inner (c_parser *, | |
1130 | bool, | |
1131 | struct c_declarator *); | |
1132 | static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree); | |
4232a958 | 1133 | static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree, |
1134 | tree); | |
1576dec7 | 1135 | static struct c_parm *c_parser_parameter_declaration (c_parser *, tree); |
1136 | static tree c_parser_simple_asm_expr (c_parser *); | |
1137 | static tree c_parser_attributes (c_parser *); | |
1138 | static struct c_type_name *c_parser_type_name (c_parser *); | |
1139 | static struct c_expr c_parser_initializer (c_parser *); | |
1140 | static struct c_expr c_parser_braced_init (c_parser *, tree, bool); | |
759791ee | 1141 | static void c_parser_initelt (c_parser *, struct obstack *); |
1142 | static void c_parser_initval (c_parser *, struct c_expr *, | |
1143 | struct obstack *); | |
1576dec7 | 1144 | static tree c_parser_compound_statement (c_parser *); |
1145 | static void c_parser_compound_statement_nostart (c_parser *); | |
1146 | static void c_parser_label (c_parser *); | |
1147 | static void c_parser_statement (c_parser *); | |
1148 | static void c_parser_statement_after_labels (c_parser *); | |
1149 | static void c_parser_if_statement (c_parser *); | |
1150 | static void c_parser_switch_statement (c_parser *); | |
1151 | static void c_parser_while_statement (c_parser *); | |
1152 | static void c_parser_do_statement (c_parser *); | |
1153 | static void c_parser_for_statement (c_parser *); | |
1154 | static tree c_parser_asm_statement (c_parser *); | |
f14c8207 | 1155 | static tree c_parser_asm_operands (c_parser *, bool); |
78f55ca8 | 1156 | static tree c_parser_asm_goto_operands (c_parser *); |
1576dec7 | 1157 | static tree c_parser_asm_clobbers (c_parser *); |
1158 | static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *); | |
1159 | static struct c_expr c_parser_conditional_expression (c_parser *, | |
1160 | struct c_expr *); | |
2169f33b | 1161 | static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *, |
1162 | enum c_parser_prec); | |
1576dec7 | 1163 | static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *); |
1164 | static struct c_expr c_parser_unary_expression (c_parser *); | |
1165 | static struct c_expr c_parser_sizeof_expression (c_parser *); | |
1166 | static struct c_expr c_parser_alignof_expression (c_parser *); | |
1167 | static struct c_expr c_parser_postfix_expression (c_parser *); | |
1168 | static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *, | |
0b09525f | 1169 | struct c_type_name *, |
1170 | location_t); | |
1576dec7 | 1171 | static struct c_expr c_parser_postfix_expression_after_primary (c_parser *, |
e60a6f7b | 1172 | location_t loc, |
1576dec7 | 1173 | struct c_expr); |
1174 | static struct c_expr c_parser_expression (c_parser *); | |
f14c8207 | 1175 | static struct c_expr c_parser_expression_conv (c_parser *); |
b9c74b4d | 1176 | static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool, |
1177 | VEC(tree,gc) **); | |
1e8e9920 | 1178 | static void c_parser_omp_construct (c_parser *); |
1179 | static void c_parser_omp_threadprivate (c_parser *); | |
1180 | static void c_parser_omp_barrier (c_parser *); | |
1181 | static void c_parser_omp_flush (c_parser *); | |
fd6481cf | 1182 | static void c_parser_omp_taskwait (c_parser *); |
2169f33b | 1183 | static void c_parser_omp_taskyield (c_parser *); |
1576dec7 | 1184 | |
b75b98aa | 1185 | enum pragma_context { pragma_external, pragma_stmt, pragma_compound }; |
1186 | static bool c_parser_pragma (c_parser *, enum pragma_context); | |
1187 | ||
1576dec7 | 1188 | /* These Objective-C parser functions are only ever called when |
1189 | compiling Objective-C. */ | |
a336eb4b | 1190 | static void c_parser_objc_class_definition (c_parser *, tree); |
1576dec7 | 1191 | static void c_parser_objc_class_instance_variables (c_parser *); |
1192 | static void c_parser_objc_class_declaration (c_parser *); | |
1193 | static void c_parser_objc_alias_declaration (c_parser *); | |
a336eb4b | 1194 | static void c_parser_objc_protocol_definition (c_parser *, tree); |
45b2b110 | 1195 | static bool c_parser_objc_method_type (c_parser *); |
1576dec7 | 1196 | static void c_parser_objc_method_definition (c_parser *); |
1197 | static void c_parser_objc_methodprotolist (c_parser *); | |
1198 | static void c_parser_objc_methodproto (c_parser *); | |
4232a958 | 1199 | static tree c_parser_objc_method_decl (c_parser *, bool, tree *, tree *); |
1576dec7 | 1200 | static tree c_parser_objc_type_name (c_parser *); |
1201 | static tree c_parser_objc_protocol_refs (c_parser *); | |
b3d2d312 | 1202 | static void c_parser_objc_try_catch_finally_statement (c_parser *); |
1576dec7 | 1203 | static void c_parser_objc_synchronized_statement (c_parser *); |
1204 | static tree c_parser_objc_selector (c_parser *); | |
1205 | static tree c_parser_objc_selector_arg (c_parser *); | |
1206 | static tree c_parser_objc_receiver (c_parser *); | |
1207 | static tree c_parser_objc_message_args (c_parser *); | |
1208 | static tree c_parser_objc_keywordexpr (c_parser *); | |
1d894bcf | 1209 | static void c_parser_objc_at_property_declaration (c_parser *); |
e1f293c0 | 1210 | static void c_parser_objc_at_synthesize_declaration (c_parser *); |
1211 | static void c_parser_objc_at_dynamic_declaration (c_parser *); | |
86c110ac | 1212 | static bool c_parser_objc_diagnose_bad_element_prefix |
a336eb4b | 1213 | (c_parser *, struct c_declspecs *); |
1576dec7 | 1214 | |
1215 | /* Parse a translation unit (C90 6.7, C99 6.9). | |
1216 | ||
1217 | translation-unit: | |
1218 | external-declarations | |
1219 | ||
1220 | external-declarations: | |
1221 | external-declaration | |
1222 | external-declarations external-declaration | |
1223 | ||
1224 | GNU extensions: | |
1225 | ||
1226 | translation-unit: | |
1227 | empty | |
1228 | */ | |
1229 | ||
1230 | static void | |
1231 | c_parser_translation_unit (c_parser *parser) | |
1232 | { | |
1233 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
1234 | { | |
48e1416a | 1235 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 1236 | "ISO C forbids an empty translation unit"); |
1576dec7 | 1237 | } |
1238 | else | |
1239 | { | |
1240 | void *obstack_position = obstack_alloc (&parser_obstack, 0); | |
3ae3a17f | 1241 | mark_valid_location_for_stdc_pragma (false); |
1576dec7 | 1242 | do |
1243 | { | |
1244 | ggc_collect (); | |
1245 | c_parser_external_declaration (parser); | |
1246 | obstack_free (&parser_obstack, obstack_position); | |
1247 | } | |
1248 | while (c_parser_next_token_is_not (parser, CPP_EOF)); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | /* Parse an external declaration (C90 6.7, C99 6.9). | |
1253 | ||
1254 | external-declaration: | |
1255 | function-definition | |
1256 | declaration | |
1257 | ||
1258 | GNU extensions: | |
1259 | ||
1260 | external-declaration: | |
1261 | asm-definition | |
1262 | ; | |
1263 | __extension__ external-declaration | |
1264 | ||
1265 | Objective-C: | |
1266 | ||
1267 | external-declaration: | |
1268 | objc-class-definition | |
1269 | objc-class-declaration | |
1270 | objc-alias-declaration | |
1271 | objc-protocol-definition | |
1272 | objc-method-definition | |
1273 | @end | |
1274 | */ | |
1275 | ||
1276 | static void | |
1277 | c_parser_external_declaration (c_parser *parser) | |
1278 | { | |
1279 | int ext; | |
1280 | switch (c_parser_peek_token (parser)->type) | |
1281 | { | |
1282 | case CPP_KEYWORD: | |
1283 | switch (c_parser_peek_token (parser)->keyword) | |
1284 | { | |
1285 | case RID_EXTENSION: | |
1286 | ext = disable_extension_diagnostics (); | |
1287 | c_parser_consume_token (parser); | |
1288 | c_parser_external_declaration (parser); | |
1289 | restore_extension_diagnostics (ext); | |
1290 | break; | |
1291 | case RID_ASM: | |
1292 | c_parser_asm_definition (parser); | |
1293 | break; | |
1294 | case RID_AT_INTERFACE: | |
1295 | case RID_AT_IMPLEMENTATION: | |
1296 | gcc_assert (c_dialect_objc ()); | |
a336eb4b | 1297 | c_parser_objc_class_definition (parser, NULL_TREE); |
1576dec7 | 1298 | break; |
e5c75ac3 | 1299 | case RID_AT_CLASS: |
1576dec7 | 1300 | gcc_assert (c_dialect_objc ()); |
1301 | c_parser_objc_class_declaration (parser); | |
1302 | break; | |
1303 | case RID_AT_ALIAS: | |
1304 | gcc_assert (c_dialect_objc ()); | |
1305 | c_parser_objc_alias_declaration (parser); | |
1306 | break; | |
1307 | case RID_AT_PROTOCOL: | |
1308 | gcc_assert (c_dialect_objc ()); | |
a336eb4b | 1309 | c_parser_objc_protocol_definition (parser, NULL_TREE); |
1576dec7 | 1310 | break; |
86c110ac | 1311 | case RID_AT_PROPERTY: |
1312 | gcc_assert (c_dialect_objc ()); | |
1d894bcf | 1313 | c_parser_objc_at_property_declaration (parser); |
86c110ac | 1314 | break; |
e1f293c0 | 1315 | case RID_AT_SYNTHESIZE: |
1316 | gcc_assert (c_dialect_objc ()); | |
1317 | c_parser_objc_at_synthesize_declaration (parser); | |
1318 | break; | |
1319 | case RID_AT_DYNAMIC: | |
1320 | gcc_assert (c_dialect_objc ()); | |
1321 | c_parser_objc_at_dynamic_declaration (parser); | |
1322 | break; | |
1576dec7 | 1323 | case RID_AT_END: |
1324 | gcc_assert (c_dialect_objc ()); | |
1325 | c_parser_consume_token (parser); | |
1326 | objc_finish_implementation (); | |
1327 | break; | |
1328 | default: | |
1329 | goto decl_or_fndef; | |
1330 | } | |
1331 | break; | |
1332 | case CPP_SEMICOLON: | |
48e1416a | 1333 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 1334 | "ISO C does not allow extra %<;%> outside of a function"); |
1576dec7 | 1335 | c_parser_consume_token (parser); |
1336 | break; | |
b75b98aa | 1337 | case CPP_PRAGMA: |
3ae3a17f | 1338 | mark_valid_location_for_stdc_pragma (true); |
b75b98aa | 1339 | c_parser_pragma (parser, pragma_external); |
3ae3a17f | 1340 | mark_valid_location_for_stdc_pragma (false); |
b75b98aa | 1341 | break; |
1576dec7 | 1342 | case CPP_PLUS: |
1343 | case CPP_MINUS: | |
1344 | if (c_dialect_objc ()) | |
1345 | { | |
1346 | c_parser_objc_method_definition (parser); | |
1347 | break; | |
1348 | } | |
1349 | /* Else fall through, and yield a syntax error trying to parse | |
1350 | as a declaration or function definition. */ | |
1351 | default: | |
1352 | decl_or_fndef: | |
a336eb4b | 1353 | /* A declaration or a function definition (or, in Objective-C, |
1354 | an @interface or @protocol with prefix attributes). We can | |
1355 | only tell which after parsing the declaration specifiers, if | |
1356 | any, and the first declarator. */ | |
0a65c3bb | 1357 | c_parser_declaration_or_fndef (parser, true, true, true, false, true, NULL); |
1576dec7 | 1358 | break; |
1359 | } | |
1360 | } | |
1361 | ||
1362 | /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99 | |
1363 | 6.7, 6.9.1). If FNDEF_OK is true, a function definition is | |
1364 | accepted; otherwise (old-style parameter declarations) only other | |
f80e7755 | 1365 | declarations are accepted. If STATIC_ASSERT_OK is true, a static |
1366 | assertion is accepted; otherwise (old-style parameter declarations) | |
1367 | it is not. If NESTED is true, we are inside a function or parsing | |
1368 | old-style parameter declarations; any functions encountered are | |
1369 | nested functions and declaration specifiers are required; otherwise | |
1370 | we are at top level and functions are normal functions and | |
1371 | declaration specifiers may be optional. If EMPTY_OK is true, empty | |
1372 | declarations are OK (subject to all other constraints); otherwise | |
1373 | (old-style parameter declarations) they are diagnosed. If | |
1374 | START_ATTR_OK is true, the declaration specifiers may start with | |
1375 | attributes; otherwise they may not. | |
0a65c3bb | 1376 | OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed |
1377 | declaration when parsing an Objective-C foreach statement. | |
1576dec7 | 1378 | |
1379 | declaration: | |
1380 | declaration-specifiers init-declarator-list[opt] ; | |
f80e7755 | 1381 | static_assert-declaration |
1576dec7 | 1382 | |
1383 | function-definition: | |
1384 | declaration-specifiers[opt] declarator declaration-list[opt] | |
1385 | compound-statement | |
1386 | ||
1387 | declaration-list: | |
1388 | declaration | |
1389 | declaration-list declaration | |
1390 | ||
1391 | init-declarator-list: | |
1392 | init-declarator | |
1393 | init-declarator-list , init-declarator | |
1394 | ||
1395 | init-declarator: | |
1396 | declarator simple-asm-expr[opt] attributes[opt] | |
1397 | declarator simple-asm-expr[opt] attributes[opt] = initializer | |
1398 | ||
1399 | GNU extensions: | |
1400 | ||
1401 | nested-function-definition: | |
1402 | declaration-specifiers declarator declaration-list[opt] | |
1403 | compound-statement | |
1404 | ||
a336eb4b | 1405 | Objective-C: |
1406 | attributes objc-class-definition | |
1407 | attributes objc-category-definition | |
1408 | attributes objc-protocol-definition | |
1409 | ||
1576dec7 | 1410 | The simple-asm-expr and attributes are GNU extensions. |
1411 | ||
1412 | This function does not handle __extension__; that is handled in its | |
1413 | callers. ??? Following the old parser, __extension__ may start | |
1414 | external declarations, declarations in functions and declarations | |
1415 | at the start of "for" loops, but not old-style parameter | |
1416 | declarations. | |
1417 | ||
1418 | C99 requires declaration specifiers in a function definition; the | |
1419 | absence is diagnosed through the diagnosis of implicit int. In GNU | |
1420 | C we also allow but diagnose declarations without declaration | |
1421 | specifiers, but only at top level (elsewhere they conflict with | |
1e8e9920 | 1422 | other syntax). |
48e1416a | 1423 | |
0a65c3bb | 1424 | In Objective-C, declarations of the looping variable in a foreach |
1425 | statement are exceptionally terminated by 'in' (for example, 'for | |
1426 | (NSObject *object in array) { ... }'). | |
1427 | ||
1e8e9920 | 1428 | OpenMP: |
48e1416a | 1429 | |
1e8e9920 | 1430 | declaration: |
1431 | threadprivate-directive */ | |
1576dec7 | 1432 | |
1433 | static void | |
f80e7755 | 1434 | c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, |
1435 | bool static_assert_ok, bool empty_ok, | |
0a65c3bb | 1436 | bool nested, bool start_attr_ok, |
1437 | tree *objc_foreach_object_declaration) | |
1576dec7 | 1438 | { |
1439 | struct c_declspecs *specs; | |
1440 | tree prefix_attrs; | |
1441 | tree all_prefix_attrs; | |
1442 | bool diagnosed_no_specs = false; | |
be9eba16 | 1443 | location_t here = c_parser_peek_token (parser)->location; |
b75b98aa | 1444 | |
f80e7755 | 1445 | if (static_assert_ok |
1446 | && c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) | |
1447 | { | |
1448 | c_parser_static_assert_declaration (parser); | |
1449 | return; | |
1450 | } | |
1576dec7 | 1451 | specs = build_null_declspecs (); |
71bb4bc6 | 1452 | |
1453 | /* Try to detect an unknown type name when we have "A B" or "A *B". */ | |
1454 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
1455 | && c_parser_peek_token (parser)->id_kind == C_ID_ID | |
1456 | && (c_parser_peek_2nd_token (parser)->type == CPP_NAME | |
1457 | || c_parser_peek_2nd_token (parser)->type == CPP_MULT) | |
1458 | && (!nested || !lookup_name (c_parser_peek_token (parser)->value))) | |
1459 | { | |
1460 | error_at (here, "unknown type name %qE", | |
1461 | c_parser_peek_token (parser)->value); | |
1462 | ||
1463 | /* Parse declspecs normally to get a correct pointer type, but avoid | |
21e609c5 | 1464 | a further "fails to be a type name" error. Refuse nested functions |
1465 | since it is not how the user likely wants us to recover. */ | |
71bb4bc6 | 1466 | c_parser_peek_token (parser)->type = CPP_KEYWORD; |
1467 | c_parser_peek_token (parser)->keyword = RID_VOID; | |
1468 | c_parser_peek_token (parser)->value = error_mark_node; | |
21e609c5 | 1469 | fndef_ok = !nested; |
71bb4bc6 | 1470 | } |
1471 | ||
26ee9e7a | 1472 | c_parser_declspecs (parser, specs, true, true, start_attr_ok, cla_nonabstract_decl); |
1576dec7 | 1473 | if (parser->error) |
1474 | { | |
1475 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1476 | return; | |
1477 | } | |
1478 | if (nested && !specs->declspecs_seen_p) | |
1479 | { | |
1480 | c_parser_error (parser, "expected declaration specifiers"); | |
1481 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1482 | return; | |
1483 | } | |
1484 | finish_declspecs (specs); | |
1485 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1486 | { | |
1487 | if (empty_ok) | |
1488 | shadow_tag (specs); | |
1489 | else | |
1490 | { | |
1491 | shadow_tag_warned (specs, 1); | |
21ca8540 | 1492 | pedwarn (here, 0, "empty declaration"); |
1576dec7 | 1493 | } |
1494 | c_parser_consume_token (parser); | |
1495 | return; | |
1496 | } | |
b02d8973 | 1497 | |
1498 | /* Provide better error recovery. Note that a type name here is usually | |
1499 | better diagnosed as a redeclaration. */ | |
1500 | if (empty_ok | |
1501 | && specs->typespec_kind == ctsk_tagdef | |
1502 | && c_parser_next_token_starts_declspecs (parser) | |
1503 | && !c_parser_next_token_is (parser, CPP_NAME)) | |
1504 | { | |
1505 | c_parser_error (parser, "expected %<;%>, identifier or %<(%>"); | |
1506 | parser->error = false; | |
1507 | shadow_tag_warned (specs, 1); | |
1508 | return; | |
1509 | } | |
a336eb4b | 1510 | else if (c_dialect_objc ()) |
1511 | { | |
03fc2271 | 1512 | /* Prefix attributes are an error on method decls. */ |
1513 | switch (c_parser_peek_token (parser)->type) | |
1514 | { | |
1515 | case CPP_PLUS: | |
1516 | case CPP_MINUS: | |
1517 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1518 | return; | |
1519 | if (specs->attrs) | |
1520 | { | |
1521 | warning_at (c_parser_peek_token (parser)->location, | |
1522 | OPT_Wattributes, | |
1523 | "prefix attributes are ignored for methods"); | |
1524 | specs->attrs = NULL_TREE; | |
1525 | } | |
1526 | if (fndef_ok) | |
1527 | c_parser_objc_method_definition (parser); | |
1528 | else | |
1529 | c_parser_objc_methodproto (parser); | |
1530 | return; | |
1531 | break; | |
1532 | default: | |
1533 | break; | |
1534 | } | |
a336eb4b | 1535 | /* This is where we parse 'attributes @interface ...', |
1536 | 'attributes @implementation ...', 'attributes @protocol ...' | |
1537 | (where attributes could be, for example, __attribute__ | |
1538 | ((deprecated)). | |
1539 | */ | |
1540 | switch (c_parser_peek_token (parser)->keyword) | |
1541 | { | |
1542 | case RID_AT_INTERFACE: | |
1543 | { | |
1544 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1545 | return; | |
1546 | c_parser_objc_class_definition (parser, specs->attrs); | |
1547 | return; | |
1548 | } | |
1549 | break; | |
1550 | case RID_AT_IMPLEMENTATION: | |
1551 | { | |
1552 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1553 | return; | |
1554 | if (specs->attrs) | |
1555 | { | |
1556 | warning_at (c_parser_peek_token (parser)->location, | |
1557 | OPT_Wattributes, | |
1558 | "prefix attributes are ignored for implementations"); | |
1559 | specs->attrs = NULL_TREE; | |
1560 | } | |
1561 | c_parser_objc_class_definition (parser, NULL_TREE); | |
1562 | return; | |
1563 | } | |
1564 | break; | |
1565 | case RID_AT_PROTOCOL: | |
1566 | { | |
1567 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1568 | return; | |
1569 | c_parser_objc_protocol_definition (parser, specs->attrs); | |
1570 | return; | |
1571 | } | |
1572 | break; | |
86c110ac | 1573 | case RID_AT_ALIAS: |
1574 | case RID_AT_CLASS: | |
1575 | case RID_AT_END: | |
1576 | case RID_AT_PROPERTY: | |
1577 | if (specs->attrs) | |
1578 | { | |
3b77900e | 1579 | c_parser_error (parser, "unexpected attribute"); |
86c110ac | 1580 | specs->attrs = NULL; |
1581 | } | |
1582 | break; | |
a336eb4b | 1583 | default: |
1584 | break; | |
1585 | } | |
1586 | } | |
1587 | ||
1576dec7 | 1588 | pending_xref_error (); |
1589 | prefix_attrs = specs->attrs; | |
1590 | all_prefix_attrs = prefix_attrs; | |
1591 | specs->attrs = NULL_TREE; | |
1592 | while (true) | |
1593 | { | |
1594 | struct c_declarator *declarator; | |
1595 | bool dummy = false; | |
6198e8f6 | 1596 | timevar_id_t tv; |
1576dec7 | 1597 | tree fnbody; |
1598 | /* Declaring either one or more declarators (in which case we | |
1599 | should diagnose if there were no declaration specifiers) or a | |
1600 | function definition (in which case the diagnostic for | |
1601 | implicit int suffices). */ | |
ae5ead32 | 1602 | declarator = c_parser_declarator (parser, |
1603 | specs->typespec_kind != ctsk_none, | |
1576dec7 | 1604 | C_DTR_NORMAL, &dummy); |
1605 | if (declarator == NULL) | |
1606 | { | |
1607 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1608 | return; | |
1609 | } | |
1610 | if (c_parser_next_token_is (parser, CPP_EQ) | |
1611 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1612 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1613 | || c_parser_next_token_is_keyword (parser, RID_ASM) | |
0a65c3bb | 1614 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE) |
1615 | || c_parser_next_token_is_keyword (parser, RID_IN)) | |
1576dec7 | 1616 | { |
1617 | tree asm_name = NULL_TREE; | |
1618 | tree postfix_attrs = NULL_TREE; | |
1619 | if (!diagnosed_no_specs && !specs->declspecs_seen_p) | |
1620 | { | |
1621 | diagnosed_no_specs = true; | |
21ca8540 | 1622 | pedwarn (here, 0, "data definition has no type or storage class"); |
1576dec7 | 1623 | } |
1624 | /* Having seen a data definition, there cannot now be a | |
1625 | function definition. */ | |
1626 | fndef_ok = false; | |
1627 | if (c_parser_next_token_is_keyword (parser, RID_ASM)) | |
1628 | asm_name = c_parser_simple_asm_expr (parser); | |
1629 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1630 | postfix_attrs = c_parser_attributes (parser); | |
1631 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1632 | { | |
1633 | tree d; | |
1634 | struct c_expr init; | |
e60a6f7b | 1635 | location_t init_loc; |
1576dec7 | 1636 | c_parser_consume_token (parser); |
1637 | /* The declaration of the variable is in effect while | |
1638 | its initializer is parsed. */ | |
1639 | d = start_decl (declarator, specs, true, | |
1640 | chainon (postfix_attrs, all_prefix_attrs)); | |
1641 | if (!d) | |
1642 | d = error_mark_node; | |
1643 | start_init (d, asm_name, global_bindings_p ()); | |
e60a6f7b | 1644 | init_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 1645 | init = c_parser_initializer (parser); |
1646 | finish_init (); | |
1647 | if (d != error_mark_node) | |
1648 | { | |
1649 | maybe_warn_string_init (TREE_TYPE (d), init); | |
e60a6f7b | 1650 | finish_decl (d, init_loc, init.value, |
1651 | init.original_type, asm_name); | |
1576dec7 | 1652 | } |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | tree d = start_decl (declarator, specs, false, | |
1657 | chainon (postfix_attrs, | |
1658 | all_prefix_attrs)); | |
1659 | if (d) | |
e60a6f7b | 1660 | finish_decl (d, UNKNOWN_LOCATION, NULL_TREE, |
0a65c3bb | 1661 | NULL_TREE, asm_name); |
1662 | ||
1663 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
1664 | { | |
1665 | if (d) | |
1666 | *objc_foreach_object_declaration = d; | |
1667 | else | |
1668 | *objc_foreach_object_declaration = error_mark_node; | |
1669 | } | |
1576dec7 | 1670 | } |
1671 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1672 | { | |
1673 | c_parser_consume_token (parser); | |
1674 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1675 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
1676 | prefix_attrs); | |
1677 | else | |
1678 | all_prefix_attrs = prefix_attrs; | |
1679 | continue; | |
1680 | } | |
1681 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1682 | { | |
1683 | c_parser_consume_token (parser); | |
1684 | return; | |
1685 | } | |
0a65c3bb | 1686 | else if (c_parser_next_token_is_keyword (parser, RID_IN)) |
1687 | { | |
1688 | /* This can only happen in Objective-C: we found the | |
1689 | 'in' that terminates the declaration inside an | |
1690 | Objective-C foreach statement. Do not consume the | |
1691 | token, so that the caller can use it to determine | |
1692 | that this indeed is a foreach context. */ | |
1693 | return; | |
1694 | } | |
1576dec7 | 1695 | else |
1696 | { | |
1697 | c_parser_error (parser, "expected %<,%> or %<;%>"); | |
1698 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1699 | return; | |
1700 | } | |
1701 | } | |
1702 | else if (!fndef_ok) | |
1703 | { | |
1704 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, " | |
1705 | "%<asm%> or %<__attribute__%>"); | |
1706 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1707 | return; | |
1708 | } | |
1709 | /* Function definition (nested or otherwise). */ | |
1710 | if (nested) | |
1711 | { | |
21ca8540 | 1712 | pedwarn (here, OPT_pedantic, "ISO C forbids nested functions"); |
d2764e2d | 1713 | c_push_function_context (); |
1576dec7 | 1714 | } |
1715 | if (!start_function (specs, declarator, all_prefix_attrs)) | |
1716 | { | |
1717 | /* This can appear in many cases looking nothing like a | |
1718 | function definition, so we don't give a more specific | |
1719 | error suggesting there was one. */ | |
1720 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> " | |
1721 | "or %<__attribute__%>"); | |
1722 | if (nested) | |
d2764e2d | 1723 | c_pop_function_context (); |
1576dec7 | 1724 | break; |
1725 | } | |
6198e8f6 | 1726 | |
1727 | if (DECL_DECLARED_INLINE_P (current_function_decl)) | |
1728 | tv = TV_PARSE_INLINE; | |
1729 | else | |
1730 | tv = TV_PARSE_FUNC; | |
1731 | timevar_push (tv); | |
1732 | ||
1576dec7 | 1733 | /* Parse old-style parameter declarations. ??? Attributes are |
1734 | not allowed to start declaration specifiers here because of a | |
1735 | syntax conflict between a function declaration with attribute | |
1736 | suffix and a function definition with an attribute prefix on | |
1737 | first old-style parameter declaration. Following the old | |
1738 | parser, they are not accepted on subsequent old-style | |
1739 | parameter declarations either. However, there is no | |
1740 | ambiguity after the first declaration, nor indeed on the | |
1741 | first as long as we don't allow postfix attributes after a | |
1742 | declarator with a nonempty identifier list in a definition; | |
1743 | and postfix attributes have never been accepted here in | |
1744 | function definitions either. */ | |
1745 | while (c_parser_next_token_is_not (parser, CPP_EOF) | |
1746 | && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE)) | |
f80e7755 | 1747 | c_parser_declaration_or_fndef (parser, false, false, false, |
0a65c3bb | 1748 | true, false, NULL); |
1576dec7 | 1749 | store_parm_decls (); |
30099c0c | 1750 | DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus |
1751 | = c_parser_peek_token (parser)->location; | |
1576dec7 | 1752 | fnbody = c_parser_compound_statement (parser); |
1753 | if (nested) | |
1754 | { | |
1755 | tree decl = current_function_decl; | |
3bb63aeb | 1756 | /* Mark nested functions as needing static-chain initially. |
1757 | lower_nested_functions will recompute it but the | |
1758 | DECL_STATIC_CHAIN flag is also used before that happens, | |
1759 | by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */ | |
1760 | DECL_STATIC_CHAIN (decl) = 1; | |
1576dec7 | 1761 | add_stmt (fnbody); |
1762 | finish_function (); | |
d2764e2d | 1763 | c_pop_function_context (); |
e60a6f7b | 1764 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
1576dec7 | 1765 | } |
1766 | else | |
1767 | { | |
1768 | add_stmt (fnbody); | |
1769 | finish_function (); | |
1770 | } | |
6198e8f6 | 1771 | |
1772 | timevar_pop (tv); | |
1576dec7 | 1773 | break; |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* Parse an asm-definition (asm() outside a function body). This is a | |
1778 | GNU extension. | |
1779 | ||
1780 | asm-definition: | |
1781 | simple-asm-expr ; | |
1782 | */ | |
1783 | ||
1784 | static void | |
1785 | c_parser_asm_definition (c_parser *parser) | |
1786 | { | |
1787 | tree asm_str = c_parser_simple_asm_expr (parser); | |
1576dec7 | 1788 | if (asm_str) |
56af936e | 1789 | cgraph_add_asm_node (asm_str); |
1576dec7 | 1790 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1791 | } | |
1792 | ||
f80e7755 | 1793 | /* Parse a static assertion (C1X N1425 6.7.10). |
1794 | ||
1795 | static_assert-declaration: | |
1796 | static_assert-declaration-no-semi ; | |
1797 | */ | |
1798 | ||
1799 | static void | |
1800 | c_parser_static_assert_declaration (c_parser *parser) | |
1801 | { | |
1802 | c_parser_static_assert_declaration_no_semi (parser); | |
1803 | if (parser->error | |
1804 | || !c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
1805 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1806 | } | |
1807 | ||
1808 | /* Parse a static assertion (C1X N1425 6.7.10), without the trailing | |
1809 | semicolon. | |
1810 | ||
1811 | static_assert-declaration-no-semi: | |
1812 | _Static_assert ( constant-expression , string-literal ) | |
1813 | */ | |
1814 | ||
1815 | static void | |
1816 | c_parser_static_assert_declaration_no_semi (c_parser *parser) | |
1817 | { | |
1818 | location_t assert_loc, value_loc; | |
1819 | tree value; | |
1820 | tree string; | |
1821 | ||
1822 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)); | |
1823 | assert_loc = c_parser_peek_token (parser)->location; | |
1824 | if (!flag_isoc1x) | |
1825 | { | |
1826 | if (flag_isoc99) | |
1827 | pedwarn (assert_loc, OPT_pedantic, | |
1828 | "ISO C99 does not support %<_Static_assert%>"); | |
1829 | else | |
1830 | pedwarn (assert_loc, OPT_pedantic, | |
1831 | "ISO C90 does not support %<_Static_assert%>"); | |
1832 | } | |
1833 | c_parser_consume_token (parser); | |
1834 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
1835 | return; | |
1836 | value_loc = c_parser_peek_token (parser)->location; | |
1837 | value = c_parser_expr_no_commas (parser, NULL).value; | |
1838 | parser->lex_untranslated_string = true; | |
1839 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
1840 | { | |
1841 | parser->lex_untranslated_string = false; | |
1842 | return; | |
1843 | } | |
1844 | switch (c_parser_peek_token (parser)->type) | |
1845 | { | |
1846 | case CPP_STRING: | |
1847 | case CPP_STRING16: | |
1848 | case CPP_STRING32: | |
1849 | case CPP_WSTRING: | |
1850 | case CPP_UTF8STRING: | |
1851 | string = c_parser_peek_token (parser)->value; | |
1852 | c_parser_consume_token (parser); | |
1853 | parser->lex_untranslated_string = false; | |
1854 | break; | |
1855 | default: | |
1856 | c_parser_error (parser, "expected string literal"); | |
1857 | parser->lex_untranslated_string = false; | |
1858 | return; | |
1859 | } | |
1860 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
1861 | ||
1862 | if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) | |
1863 | { | |
1864 | error_at (value_loc, "expression in static assertion is not an integer"); | |
1865 | return; | |
1866 | } | |
1867 | if (TREE_CODE (value) != INTEGER_CST) | |
1868 | { | |
1869 | value = c_fully_fold (value, false, NULL); | |
1870 | if (TREE_CODE (value) == INTEGER_CST) | |
1871 | pedwarn (value_loc, OPT_pedantic, "expression in static assertion " | |
1872 | "is not an integer constant expression"); | |
1873 | } | |
1874 | if (TREE_CODE (value) != INTEGER_CST) | |
1875 | { | |
1876 | error_at (value_loc, "expression in static assertion is not constant"); | |
1877 | return; | |
1878 | } | |
1879 | constant_expression_warning (value); | |
1880 | if (integer_zerop (value)) | |
1881 | error_at (assert_loc, "static assertion failed: %E", string); | |
1882 | } | |
1883 | ||
1576dec7 | 1884 | /* Parse some declaration specifiers (possibly none) (C90 6.5, C99 |
1885 | 6.7), adding them to SPECS (which may already include some). | |
1886 | Storage class specifiers are accepted iff SCSPEC_OK; type | |
1887 | specifiers are accepted iff TYPESPEC_OK; attributes are accepted at | |
1888 | the start iff START_ATTR_OK. | |
1889 | ||
1890 | declaration-specifiers: | |
1891 | storage-class-specifier declaration-specifiers[opt] | |
1892 | type-specifier declaration-specifiers[opt] | |
1893 | type-qualifier declaration-specifiers[opt] | |
1894 | function-specifier declaration-specifiers[opt] | |
83e25171 | 1895 | alignment-specifier declaration-specifiers[opt] |
1576dec7 | 1896 | |
1897 | Function specifiers (inline) are from C99, and are currently | |
83e25171 | 1898 | handled as storage class specifiers, as is __thread. Alignment |
1899 | specifiers are from C1X. | |
1576dec7 | 1900 | |
1901 | C90 6.5.1, C99 6.7.1: | |
1902 | storage-class-specifier: | |
1903 | typedef | |
1904 | extern | |
1905 | static | |
1906 | auto | |
1907 | register | |
1908 | ||
1909 | C99 6.7.4: | |
1910 | function-specifier: | |
1911 | inline | |
4755ceab | 1912 | _Noreturn |
1913 | ||
1914 | (_Noreturn is new in C1X.) | |
1576dec7 | 1915 | |
1916 | C90 6.5.2, C99 6.7.2: | |
1917 | type-specifier: | |
1918 | void | |
1919 | char | |
1920 | short | |
1921 | int | |
1922 | long | |
1923 | float | |
1924 | double | |
1925 | signed | |
1926 | unsigned | |
1927 | _Bool | |
1928 | _Complex | |
1929 | [_Imaginary removed in C99 TC2] | |
1930 | struct-or-union-specifier | |
1931 | enum-specifier | |
1932 | typedef-name | |
1933 | ||
1934 | (_Bool and _Complex are new in C99.) | |
1935 | ||
1936 | C90 6.5.3, C99 6.7.3: | |
1937 | ||
1938 | type-qualifier: | |
1939 | const | |
1940 | restrict | |
1941 | volatile | |
6d5d708e | 1942 | address-space-qualifier |
1576dec7 | 1943 | |
1944 | (restrict is new in C99.) | |
1945 | ||
1946 | GNU extensions: | |
1947 | ||
1948 | declaration-specifiers: | |
1949 | attributes declaration-specifiers[opt] | |
1950 | ||
6d5d708e | 1951 | type-qualifier: |
1952 | address-space | |
1953 | ||
1954 | address-space: | |
1955 | identifier recognized by the target | |
1956 | ||
1576dec7 | 1957 | storage-class-specifier: |
1958 | __thread | |
1959 | ||
1960 | type-specifier: | |
1961 | typeof-specifier | |
6388cfe2 | 1962 | __int128 |
c4503c0a | 1963 | _Decimal32 |
1964 | _Decimal64 | |
1965 | _Decimal128 | |
9421ebb9 | 1966 | _Fract |
1967 | _Accum | |
1968 | _Sat | |
1969 | ||
1970 | (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037: | |
1971 | http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) | |
1576dec7 | 1972 | |
1973 | Objective-C: | |
1974 | ||
1975 | type-specifier: | |
1976 | class-name objc-protocol-refs[opt] | |
1977 | typedef-name objc-protocol-refs | |
1978 | objc-protocol-refs | |
1979 | */ | |
1980 | ||
1981 | static void | |
1982 | c_parser_declspecs (c_parser *parser, struct c_declspecs *specs, | |
26ee9e7a | 1983 | bool scspec_ok, bool typespec_ok, bool start_attr_ok, |
1984 | enum c_lookahead_kind la) | |
1576dec7 | 1985 | { |
1986 | bool attrs_ok = start_attr_ok; | |
ae5ead32 | 1987 | bool seen_type = specs->typespec_kind != ctsk_none; |
26ee9e7a | 1988 | |
1989 | if (!typespec_ok) | |
1990 | gcc_assert (la == cla_prefer_id); | |
1991 | ||
1992 | while (c_parser_next_token_is (parser, CPP_NAME) | |
1576dec7 | 1993 | || c_parser_next_token_is (parser, CPP_KEYWORD) |
1994 | || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS))) | |
1995 | { | |
1996 | struct c_typespec t; | |
1997 | tree attrs; | |
83e25171 | 1998 | tree align; |
843bd2fa | 1999 | location_t loc = c_parser_peek_token (parser)->location; |
b02d8973 | 2000 | |
26ee9e7a | 2001 | /* If we cannot accept a type, exit if the next token must start |
2002 | one. Also, if we already have seen a tagged definition, | |
2003 | a typename would be an error anyway and likely the user | |
2004 | has simply forgotten a semicolon, so we exit. */ | |
2005 | if ((!typespec_ok || specs->typespec_kind == ctsk_tagdef) | |
2006 | && c_parser_next_tokens_start_typename (parser, la) | |
2007 | && !c_parser_next_token_is_qualifier (parser)) | |
2008 | break; | |
b02d8973 | 2009 | |
1576dec7 | 2010 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2011 | { | |
2012 | tree value = c_parser_peek_token (parser)->value; | |
2013 | c_id_kind kind = c_parser_peek_token (parser)->id_kind; | |
6d5d708e | 2014 | |
2015 | if (kind == C_ID_ADDRSPACE) | |
2016 | { | |
2017 | addr_space_t as | |
2018 | = c_parser_peek_token (parser)->keyword - RID_FIRST_ADDR_SPACE; | |
2019 | declspecs_add_addrspace (specs, as); | |
2020 | c_parser_consume_token (parser); | |
2021 | attrs_ok = true; | |
2022 | continue; | |
2023 | } | |
2024 | ||
26ee9e7a | 2025 | gcc_assert (!c_parser_next_token_is_qualifier (parser)); |
2026 | ||
2027 | /* If we cannot accept a type, and the next token must start one, | |
2028 | exit. Do the same if we already have seen a tagged definition, | |
2029 | since it would be an error anyway and likely the user has simply | |
2030 | forgotten a semicolon. */ | |
2031 | if (seen_type || !c_parser_next_tokens_start_typename (parser, la)) | |
2032 | break; | |
2033 | ||
2034 | /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or | |
2035 | a C_ID_CLASSNAME. */ | |
1576dec7 | 2036 | c_parser_consume_token (parser); |
2037 | seen_type = true; | |
2038 | attrs_ok = true; | |
26ee9e7a | 2039 | if (kind == C_ID_ID) |
2040 | { | |
2041 | error ("unknown type name %qE", value); | |
2042 | t.kind = ctsk_typedef; | |
2043 | t.spec = error_mark_node; | |
2044 | } | |
2045 | else if (kind == C_ID_TYPENAME | |
2046 | && (!c_dialect_objc () | |
2047 | || c_parser_next_token_is_not (parser, CPP_LESS))) | |
1576dec7 | 2048 | { |
2049 | t.kind = ctsk_typedef; | |
2050 | /* For a typedef name, record the meaning, not the name. | |
2051 | In case of 'foo foo, bar;'. */ | |
2052 | t.spec = lookup_name (value); | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | tree proto = NULL_TREE; | |
2057 | gcc_assert (c_dialect_objc ()); | |
2058 | t.kind = ctsk_objc; | |
2059 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
2060 | proto = c_parser_objc_protocol_refs (parser); | |
2061 | t.spec = objc_get_protocol_qualified_type (value, proto); | |
2062 | } | |
26ee9e7a | 2063 | t.expr = NULL_TREE; |
2064 | t.expr_const_operands = true; | |
843bd2fa | 2065 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2066 | continue; |
2067 | } | |
2068 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
2069 | { | |
2070 | /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" - | |
2071 | nisse@lysator.liu.se. */ | |
2072 | tree proto; | |
2073 | gcc_assert (c_dialect_objc ()); | |
2074 | if (!typespec_ok || seen_type) | |
2075 | break; | |
2076 | proto = c_parser_objc_protocol_refs (parser); | |
2077 | t.kind = ctsk_objc; | |
2078 | t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto); | |
a75b1c71 | 2079 | t.expr = NULL_TREE; |
2080 | t.expr_const_operands = true; | |
843bd2fa | 2081 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2082 | continue; |
2083 | } | |
2084 | gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD)); | |
2085 | switch (c_parser_peek_token (parser)->keyword) | |
2086 | { | |
2087 | case RID_STATIC: | |
2088 | case RID_EXTERN: | |
2089 | case RID_REGISTER: | |
2090 | case RID_TYPEDEF: | |
2091 | case RID_INLINE: | |
985c6e3a | 2092 | case RID_NORETURN: |
1576dec7 | 2093 | case RID_AUTO: |
2094 | case RID_THREAD: | |
2095 | if (!scspec_ok) | |
2096 | goto out; | |
2097 | attrs_ok = true; | |
985c6e3a | 2098 | /* TODO: Distinguish between function specifiers (inline, noreturn) |
1576dec7 | 2099 | and storage class specifiers, either here or in |
2100 | declspecs_add_scspec. */ | |
2101 | declspecs_add_scspec (specs, c_parser_peek_token (parser)->value); | |
2102 | c_parser_consume_token (parser); | |
2103 | break; | |
2104 | case RID_UNSIGNED: | |
2105 | case RID_LONG: | |
6388cfe2 | 2106 | case RID_INT128: |
1576dec7 | 2107 | case RID_SHORT: |
2108 | case RID_SIGNED: | |
2109 | case RID_COMPLEX: | |
2110 | case RID_INT: | |
2111 | case RID_CHAR: | |
2112 | case RID_FLOAT: | |
2113 | case RID_DOUBLE: | |
2114 | case RID_VOID: | |
c4503c0a | 2115 | case RID_DFLOAT32: |
2116 | case RID_DFLOAT64: | |
2117 | case RID_DFLOAT128: | |
1576dec7 | 2118 | case RID_BOOL: |
9421ebb9 | 2119 | case RID_FRACT: |
2120 | case RID_ACCUM: | |
2121 | case RID_SAT: | |
1576dec7 | 2122 | if (!typespec_ok) |
2123 | goto out; | |
2124 | attrs_ok = true; | |
2125 | seen_type = true; | |
920d59b0 | 2126 | if (c_dialect_objc ()) |
2127 | parser->objc_need_raw_identifier = true; | |
1576dec7 | 2128 | t.kind = ctsk_resword; |
2129 | t.spec = c_parser_peek_token (parser)->value; | |
a75b1c71 | 2130 | t.expr = NULL_TREE; |
2131 | t.expr_const_operands = true; | |
843bd2fa | 2132 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2133 | c_parser_consume_token (parser); |
2134 | break; | |
2135 | case RID_ENUM: | |
2136 | if (!typespec_ok) | |
2137 | goto out; | |
2138 | attrs_ok = true; | |
2139 | seen_type = true; | |
2140 | t = c_parser_enum_specifier (parser); | |
843bd2fa | 2141 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2142 | break; |
2143 | case RID_STRUCT: | |
2144 | case RID_UNION: | |
2145 | if (!typespec_ok) | |
2146 | goto out; | |
2147 | attrs_ok = true; | |
2148 | seen_type = true; | |
2149 | t = c_parser_struct_or_union_specifier (parser); | |
dd2b35f1 | 2150 | invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, t.spec); |
843bd2fa | 2151 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2152 | break; |
2153 | case RID_TYPEOF: | |
2154 | /* ??? The old parser rejected typeof after other type | |
2155 | specifiers, but is a syntax error the best way of | |
2156 | handling this? */ | |
2157 | if (!typespec_ok || seen_type) | |
2158 | goto out; | |
2159 | attrs_ok = true; | |
2160 | seen_type = true; | |
2161 | t = c_parser_typeof_specifier (parser); | |
843bd2fa | 2162 | declspecs_add_type (loc, specs, t); |
1576dec7 | 2163 | break; |
2164 | case RID_CONST: | |
2165 | case RID_VOLATILE: | |
2166 | case RID_RESTRICT: | |
2167 | attrs_ok = true; | |
2168 | declspecs_add_qual (specs, c_parser_peek_token (parser)->value); | |
2169 | c_parser_consume_token (parser); | |
2170 | break; | |
2171 | case RID_ATTRIBUTE: | |
2172 | if (!attrs_ok) | |
2173 | goto out; | |
2174 | attrs = c_parser_attributes (parser); | |
2175 | declspecs_add_attrs (specs, attrs); | |
2176 | break; | |
83e25171 | 2177 | case RID_ALIGNAS: |
2178 | align = c_parser_alignas_specifier (parser); | |
2179 | declspecs_add_alignas (specs, align); | |
2180 | break; | |
1576dec7 | 2181 | default: |
2182 | goto out; | |
2183 | } | |
2184 | } | |
2185 | out: ; | |
2186 | } | |
2187 | ||
2188 | /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2). | |
2189 | ||
2190 | enum-specifier: | |
2191 | enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt] | |
2192 | enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt] | |
2193 | enum attributes[opt] identifier | |
2194 | ||
2195 | The form with trailing comma is new in C99. The forms with | |
2196 | attributes are GNU extensions. In GNU C, we accept any expression | |
2197 | without commas in the syntax (assignment expressions, not just | |
2198 | conditional expressions); assignment expressions will be diagnosed | |
2199 | as non-constant. | |
2200 | ||
2201 | enumerator-list: | |
2202 | enumerator | |
2203 | enumerator-list , enumerator | |
2204 | ||
2205 | enumerator: | |
2206 | enumeration-constant | |
2207 | enumeration-constant = constant-expression | |
2208 | */ | |
2209 | ||
2210 | static struct c_typespec | |
2211 | c_parser_enum_specifier (c_parser *parser) | |
2212 | { | |
2213 | struct c_typespec ret; | |
2214 | tree attrs; | |
2215 | tree ident = NULL_TREE; | |
0b09525f | 2216 | location_t enum_loc; |
019abced | 2217 | location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
1576dec7 | 2218 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM)); |
0b09525f | 2219 | enum_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 2220 | c_parser_consume_token (parser); |
2221 | attrs = c_parser_attributes (parser); | |
e60a6f7b | 2222 | enum_loc = c_parser_peek_token (parser)->location; |
8c37d359 | 2223 | /* Set the location in case we create a decl now. */ |
2224 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
1576dec7 | 2225 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2226 | { | |
2227 | ident = c_parser_peek_token (parser)->value; | |
be9eba16 | 2228 | ident_loc = c_parser_peek_token (parser)->location; |
0b09525f | 2229 | enum_loc = ident_loc; |
1576dec7 | 2230 | c_parser_consume_token (parser); |
2231 | } | |
2232 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
2233 | { | |
2234 | /* Parse an enum definition. */ | |
13c7079e | 2235 | struct c_enum_contents the_enum; |
6198e8f6 | 2236 | tree type; |
1576dec7 | 2237 | tree postfix_attrs; |
2238 | /* We chain the enumerators in reverse order, then put them in | |
2239 | forward order at the end. */ | |
6198e8f6 | 2240 | tree values; |
2241 | timevar_push (TV_PARSE_ENUM); | |
2242 | type = start_enum (enum_loc, &the_enum, ident); | |
2243 | values = NULL_TREE; | |
1576dec7 | 2244 | c_parser_consume_token (parser); |
2245 | while (true) | |
2246 | { | |
2247 | tree enum_id; | |
2248 | tree enum_value; | |
2249 | tree enum_decl; | |
2250 | bool seen_comma; | |
8c37d359 | 2251 | c_token *token; |
019abced | 2252 | location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
5a7ce2ec | 2253 | location_t decl_loc, value_loc; |
1576dec7 | 2254 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
2255 | { | |
2256 | c_parser_error (parser, "expected identifier"); | |
2257 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2258 | values = error_mark_node; | |
2259 | break; | |
2260 | } | |
8c37d359 | 2261 | token = c_parser_peek_token (parser); |
2262 | enum_id = token->value; | |
2263 | /* Set the location in case we create a decl now. */ | |
2264 | c_parser_set_source_position_from_token (token); | |
5a7ce2ec | 2265 | decl_loc = value_loc = token->location; |
1576dec7 | 2266 | c_parser_consume_token (parser); |
2267 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
2268 | { | |
2269 | c_parser_consume_token (parser); | |
e8fc0d34 | 2270 | value_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 2271 | enum_value = c_parser_expr_no_commas (parser, NULL).value; |
2272 | } | |
2273 | else | |
2274 | enum_value = NULL_TREE; | |
5a7ce2ec | 2275 | enum_decl = build_enumerator (decl_loc, value_loc, |
e60a6f7b | 2276 | &the_enum, enum_id, enum_value); |
1576dec7 | 2277 | TREE_CHAIN (enum_decl) = values; |
2278 | values = enum_decl; | |
2279 | seen_comma = false; | |
2280 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2281 | { | |
be9eba16 | 2282 | comma_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 2283 | seen_comma = true; |
2284 | c_parser_consume_token (parser); | |
2285 | } | |
2286 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2287 | { | |
8864917d | 2288 | if (seen_comma && !flag_isoc99) |
21ca8540 | 2289 | pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list"); |
1576dec7 | 2290 | c_parser_consume_token (parser); |
2291 | break; | |
2292 | } | |
2293 | if (!seen_comma) | |
2294 | { | |
2295 | c_parser_error (parser, "expected %<,%> or %<}%>"); | |
2296 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2297 | values = error_mark_node; | |
2298 | break; | |
2299 | } | |
2300 | } | |
2301 | postfix_attrs = c_parser_attributes (parser); | |
2302 | ret.spec = finish_enum (type, nreverse (values), | |
2303 | chainon (attrs, postfix_attrs)); | |
2304 | ret.kind = ctsk_tagdef; | |
a75b1c71 | 2305 | ret.expr = NULL_TREE; |
2306 | ret.expr_const_operands = true; | |
6198e8f6 | 2307 | timevar_pop (TV_PARSE_ENUM); |
1576dec7 | 2308 | return ret; |
2309 | } | |
2310 | else if (!ident) | |
2311 | { | |
2312 | c_parser_error (parser, "expected %<{%>"); | |
2313 | ret.spec = error_mark_node; | |
2314 | ret.kind = ctsk_tagref; | |
a75b1c71 | 2315 | ret.expr = NULL_TREE; |
2316 | ret.expr_const_operands = true; | |
1576dec7 | 2317 | return ret; |
2318 | } | |
e60a6f7b | 2319 | ret = parser_xref_tag (ident_loc, ENUMERAL_TYPE, ident); |
1576dec7 | 2320 | /* In ISO C, enumerated types can be referred to only if already |
2321 | defined. */ | |
2322 | if (pedantic && !COMPLETE_TYPE_P (ret.spec)) | |
be9eba16 | 2323 | { |
2324 | gcc_assert (ident); | |
e60a6f7b | 2325 | pedwarn (enum_loc, OPT_pedantic, |
21ca8540 | 2326 | "ISO C forbids forward references to %<enum%> types"); |
be9eba16 | 2327 | } |
1576dec7 | 2328 | return ret; |
2329 | } | |
2330 | ||
2331 | /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1). | |
2332 | ||
2333 | struct-or-union-specifier: | |
2334 | struct-or-union attributes[opt] identifier[opt] | |
2335 | { struct-contents } attributes[opt] | |
2336 | struct-or-union attributes[opt] identifier | |
2337 | ||
2338 | struct-contents: | |
2339 | struct-declaration-list | |
2340 | ||
2341 | struct-declaration-list: | |
2342 | struct-declaration ; | |
2343 | struct-declaration-list struct-declaration ; | |
2344 | ||
2345 | GNU extensions: | |
2346 | ||
2347 | struct-contents: | |
2348 | empty | |
2349 | struct-declaration | |
2350 | struct-declaration-list struct-declaration | |
2351 | ||
2352 | struct-declaration-list: | |
2353 | struct-declaration-list ; | |
2354 | ; | |
2355 | ||
2356 | (Note that in the syntax here, unlike that in ISO C, the semicolons | |
2357 | are included here rather than in struct-declaration, in order to | |
2358 | describe the syntax with extra semicolons and missing semicolon at | |
2359 | end.) | |
2360 | ||
2361 | Objective-C: | |
2362 | ||
2363 | struct-declaration-list: | |
2364 | @defs ( class-name ) | |
2365 | ||
2366 | (Note this does not include a trailing semicolon, but can be | |
2367 | followed by further declarations, and gets a pedwarn-if-pedantic | |
2368 | when followed by a semicolon.) */ | |
2369 | ||
2370 | static struct c_typespec | |
2371 | c_parser_struct_or_union_specifier (c_parser *parser) | |
2372 | { | |
2373 | struct c_typespec ret; | |
2374 | tree attrs; | |
2375 | tree ident = NULL_TREE; | |
0b09525f | 2376 | location_t struct_loc; |
2377 | location_t ident_loc = UNKNOWN_LOCATION; | |
1576dec7 | 2378 | enum tree_code code; |
2379 | switch (c_parser_peek_token (parser)->keyword) | |
2380 | { | |
2381 | case RID_STRUCT: | |
2382 | code = RECORD_TYPE; | |
2383 | break; | |
2384 | case RID_UNION: | |
2385 | code = UNION_TYPE; | |
2386 | break; | |
2387 | default: | |
2388 | gcc_unreachable (); | |
2389 | } | |
0b09525f | 2390 | struct_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 2391 | c_parser_consume_token (parser); |
2392 | attrs = c_parser_attributes (parser); | |
e60a6f7b | 2393 | |
8c37d359 | 2394 | /* Set the location in case we create a decl now. */ |
2395 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
e60a6f7b | 2396 | |
1576dec7 | 2397 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2398 | { | |
2399 | ident = c_parser_peek_token (parser)->value; | |
0b09525f | 2400 | ident_loc = c_parser_peek_token (parser)->location; |
2401 | struct_loc = ident_loc; | |
1576dec7 | 2402 | c_parser_consume_token (parser); |
2403 | } | |
2404 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
2405 | { | |
2406 | /* Parse a struct or union definition. Start the scope of the | |
2407 | tag before parsing components. */ | |
843bd2fa | 2408 | struct c_struct_parse_info *struct_info; |
2409 | tree type = start_struct (struct_loc, code, ident, &struct_info); | |
1576dec7 | 2410 | tree postfix_attrs; |
2411 | /* We chain the components in reverse order, then put them in | |
2412 | forward order at the end. Each struct-declaration may | |
2413 | declare multiple components (comma-separated), so we must use | |
2414 | chainon to join them, although when parsing each | |
2415 | struct-declaration we can use TREE_CHAIN directly. | |
2416 | ||
2417 | The theory behind all this is that there will be more | |
2418 | semicolon separated fields than comma separated fields, and | |
2419 | so we'll be minimizing the number of node traversals required | |
2420 | by chainon. */ | |
6198e8f6 | 2421 | tree contents; |
2422 | timevar_push (TV_PARSE_STRUCT); | |
2423 | contents = NULL_TREE; | |
1576dec7 | 2424 | c_parser_consume_token (parser); |
2425 | /* Handle the Objective-C @defs construct, | |
2426 | e.g. foo(sizeof(struct{ @defs(ClassName) }));. */ | |
2427 | if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS)) | |
2428 | { | |
2429 | tree name; | |
2430 | gcc_assert (c_dialect_objc ()); | |
2431 | c_parser_consume_token (parser); | |
2432 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2433 | goto end_at_defs; | |
2434 | if (c_parser_next_token_is (parser, CPP_NAME) | |
2435 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME) | |
2436 | { | |
2437 | name = c_parser_peek_token (parser)->value; | |
2438 | c_parser_consume_token (parser); | |
2439 | } | |
2440 | else | |
2441 | { | |
2442 | c_parser_error (parser, "expected class name"); | |
2443 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2444 | goto end_at_defs; | |
2445 | } | |
2446 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2447 | "expected %<)%>"); | |
2448 | contents = nreverse (objc_get_class_ivars (name)); | |
2449 | } | |
2450 | end_at_defs: | |
2451 | /* Parse the struct-declarations and semicolons. Problems with | |
2452 | semicolons are diagnosed here; empty structures are diagnosed | |
2453 | elsewhere. */ | |
2454 | while (true) | |
2455 | { | |
2456 | tree decls; | |
2457 | /* Parse any stray semicolon. */ | |
2458 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2459 | { | |
48e1416a | 2460 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 2461 | "extra semicolon in struct or union specified"); |
1576dec7 | 2462 | c_parser_consume_token (parser); |
2463 | continue; | |
2464 | } | |
2465 | /* Stop if at the end of the struct or union contents. */ | |
2466 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2467 | { | |
2468 | c_parser_consume_token (parser); | |
2469 | break; | |
2470 | } | |
b75b98aa | 2471 | /* Accept #pragmas at struct scope. */ |
2472 | if (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
2473 | { | |
2474 | c_parser_pragma (parser, pragma_external); | |
2475 | continue; | |
2476 | } | |
1576dec7 | 2477 | /* Parse some comma-separated declarations, but not the |
2478 | trailing semicolon if any. */ | |
2479 | decls = c_parser_struct_declaration (parser); | |
2480 | contents = chainon (decls, contents); | |
2481 | /* If no semicolon follows, either we have a parse error or | |
2482 | are at the end of the struct or union and should | |
2483 | pedwarn. */ | |
2484 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2485 | c_parser_consume_token (parser); | |
2486 | else | |
2487 | { | |
2488 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
48e1416a | 2489 | pedwarn (c_parser_peek_token (parser)->location, 0, |
21ca8540 | 2490 | "no semicolon at end of struct or union"); |
b02d8973 | 2491 | else if (parser->error |
2492 | || !c_parser_next_token_starts_declspecs (parser)) | |
1576dec7 | 2493 | { |
2494 | c_parser_error (parser, "expected %<;%>"); | |
2495 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2496 | break; | |
2497 | } | |
b02d8973 | 2498 | |
2499 | /* If we come here, we have already emitted an error | |
2500 | for an expected `;', identifier or `(', and we also | |
2501 | recovered already. Go on with the next field. */ | |
1576dec7 | 2502 | } |
2503 | } | |
2504 | postfix_attrs = c_parser_attributes (parser); | |
e60a6f7b | 2505 | ret.spec = finish_struct (struct_loc, type, nreverse (contents), |
843bd2fa | 2506 | chainon (attrs, postfix_attrs), struct_info); |
1576dec7 | 2507 | ret.kind = ctsk_tagdef; |
a75b1c71 | 2508 | ret.expr = NULL_TREE; |
2509 | ret.expr_const_operands = true; | |
6198e8f6 | 2510 | timevar_pop (TV_PARSE_STRUCT); |
1576dec7 | 2511 | return ret; |
2512 | } | |
2513 | else if (!ident) | |
2514 | { | |
2515 | c_parser_error (parser, "expected %<{%>"); | |
2516 | ret.spec = error_mark_node; | |
2517 | ret.kind = ctsk_tagref; | |
a75b1c71 | 2518 | ret.expr = NULL_TREE; |
2519 | ret.expr_const_operands = true; | |
b6903102 | 2520 | return ret; |
1576dec7 | 2521 | } |
e60a6f7b | 2522 | ret = parser_xref_tag (ident_loc, code, ident); |
1576dec7 | 2523 | return ret; |
2524 | } | |
2525 | ||
2526 | /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without* | |
2527 | the trailing semicolon. | |
2528 | ||
2529 | struct-declaration: | |
2530 | specifier-qualifier-list struct-declarator-list | |
f80e7755 | 2531 | static_assert-declaration-no-semi |
1576dec7 | 2532 | |
2533 | specifier-qualifier-list: | |
2534 | type-specifier specifier-qualifier-list[opt] | |
2535 | type-qualifier specifier-qualifier-list[opt] | |
2536 | attributes specifier-qualifier-list[opt] | |
2537 | ||
2538 | struct-declarator-list: | |
2539 | struct-declarator | |
2540 | struct-declarator-list , attributes[opt] struct-declarator | |
2541 | ||
2542 | struct-declarator: | |
2543 | declarator attributes[opt] | |
2544 | declarator[opt] : constant-expression attributes[opt] | |
2545 | ||
2546 | GNU extensions: | |
2547 | ||
2548 | struct-declaration: | |
2549 | __extension__ struct-declaration | |
2550 | specifier-qualifier-list | |
2551 | ||
2552 | Unlike the ISO C syntax, semicolons are handled elsewhere. The use | |
2553 | of attributes where shown is a GNU extension. In GNU C, we accept | |
2554 | any expression without commas in the syntax (assignment | |
2555 | expressions, not just conditional expressions); assignment | |
2556 | expressions will be diagnosed as non-constant. */ | |
2557 | ||
2558 | static tree | |
2559 | c_parser_struct_declaration (c_parser *parser) | |
2560 | { | |
2561 | struct c_declspecs *specs; | |
2562 | tree prefix_attrs; | |
2563 | tree all_prefix_attrs; | |
2564 | tree decls; | |
be9eba16 | 2565 | location_t decl_loc; |
1576dec7 | 2566 | if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) |
2567 | { | |
2568 | int ext; | |
2569 | tree decl; | |
2570 | ext = disable_extension_diagnostics (); | |
2571 | c_parser_consume_token (parser); | |
2572 | decl = c_parser_struct_declaration (parser); | |
2573 | restore_extension_diagnostics (ext); | |
2574 | return decl; | |
2575 | } | |
f80e7755 | 2576 | if (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) |
2577 | { | |
2578 | c_parser_static_assert_declaration_no_semi (parser); | |
2579 | return NULL_TREE; | |
2580 | } | |
1576dec7 | 2581 | specs = build_null_declspecs (); |
be9eba16 | 2582 | decl_loc = c_parser_peek_token (parser)->location; |
26ee9e7a | 2583 | c_parser_declspecs (parser, specs, false, true, true, cla_nonabstract_decl); |
1576dec7 | 2584 | if (parser->error) |
b6903102 | 2585 | return NULL_TREE; |
1576dec7 | 2586 | if (!specs->declspecs_seen_p) |
2587 | { | |
2588 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
2589 | return NULL_TREE; | |
2590 | } | |
2591 | finish_declspecs (specs); | |
a25b333d | 2592 | if (c_parser_next_token_is (parser, CPP_SEMICOLON) |
2593 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
1576dec7 | 2594 | { |
2595 | tree ret; | |
ae5ead32 | 2596 | if (specs->typespec_kind == ctsk_none) |
1576dec7 | 2597 | { |
48e1416a | 2598 | pedwarn (decl_loc, OPT_pedantic, |
21ca8540 | 2599 | "ISO C forbids member declarations with no members"); |
1576dec7 | 2600 | shadow_tag_warned (specs, pedantic); |
2601 | ret = NULL_TREE; | |
2602 | } | |
2603 | else | |
2604 | { | |
2605 | /* Support for unnamed structs or unions as members of | |
2606 | structs or unions (which is [a] useful and [b] supports | |
2607 | MS P-SDK). */ | |
e47ffaae | 2608 | tree attrs = NULL; |
d520c1f2 | 2609 | |
2610 | ret = grokfield (c_parser_peek_token (parser)->location, | |
2611 | build_id_declarator (NULL_TREE), specs, | |
e47ffaae | 2612 | NULL_TREE, &attrs); |
9a21152d | 2613 | if (ret) |
2614 | decl_attributes (&ret, attrs, 0); | |
1576dec7 | 2615 | } |
2616 | return ret; | |
2617 | } | |
b02d8973 | 2618 | |
2619 | /* Provide better error recovery. Note that a type name here is valid, | |
2620 | and will be treated as a field name. */ | |
2621 | if (specs->typespec_kind == ctsk_tagdef | |
2622 | && TREE_CODE (specs->type) != ENUMERAL_TYPE | |
2623 | && c_parser_next_token_starts_declspecs (parser) | |
2624 | && !c_parser_next_token_is (parser, CPP_NAME)) | |
2625 | { | |
2626 | c_parser_error (parser, "expected %<;%>, identifier or %<(%>"); | |
2627 | parser->error = false; | |
2628 | return NULL_TREE; | |
2629 | } | |
2630 | ||
1576dec7 | 2631 | pending_xref_error (); |
2632 | prefix_attrs = specs->attrs; | |
2633 | all_prefix_attrs = prefix_attrs; | |
2634 | specs->attrs = NULL_TREE; | |
2635 | decls = NULL_TREE; | |
2636 | while (true) | |
2637 | { | |
2638 | /* Declaring one or more declarators or un-named bit-fields. */ | |
2639 | struct c_declarator *declarator; | |
2640 | bool dummy = false; | |
2641 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2642 | declarator = build_id_declarator (NULL_TREE); | |
2643 | else | |
ae5ead32 | 2644 | declarator = c_parser_declarator (parser, |
2645 | specs->typespec_kind != ctsk_none, | |
1576dec7 | 2646 | C_DTR_NORMAL, &dummy); |
2647 | if (declarator == NULL) | |
2648 | { | |
2649 | c_parser_skip_to_end_of_block_or_statement (parser); | |
2650 | break; | |
2651 | } | |
2652 | if (c_parser_next_token_is (parser, CPP_COLON) | |
2653 | || c_parser_next_token_is (parser, CPP_COMMA) | |
2654 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2655 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE) | |
2656 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2657 | { | |
2658 | tree postfix_attrs = NULL_TREE; | |
2659 | tree width = NULL_TREE; | |
2660 | tree d; | |
2661 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2662 | { | |
2663 | c_parser_consume_token (parser); | |
2664 | width = c_parser_expr_no_commas (parser, NULL).value; | |
2665 | } | |
2666 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2667 | postfix_attrs = c_parser_attributes (parser); | |
d520c1f2 | 2668 | d = grokfield (c_parser_peek_token (parser)->location, |
2669 | declarator, specs, width, &all_prefix_attrs); | |
1576dec7 | 2670 | decl_attributes (&d, chainon (postfix_attrs, |
2671 | all_prefix_attrs), 0); | |
1767a056 | 2672 | DECL_CHAIN (d) = decls; |
1576dec7 | 2673 | decls = d; |
2674 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2675 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
2676 | prefix_attrs); | |
2677 | else | |
2678 | all_prefix_attrs = prefix_attrs; | |
2679 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2680 | c_parser_consume_token (parser); | |
2681 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2682 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2683 | { | |
2684 | /* Semicolon consumed in caller. */ | |
2685 | break; | |
2686 | } | |
2687 | else | |
2688 | { | |
2689 | c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>"); | |
2690 | break; | |
2691 | } | |
2692 | } | |
2693 | else | |
2694 | { | |
2695 | c_parser_error (parser, | |
2696 | "expected %<:%>, %<,%>, %<;%>, %<}%> or " | |
2697 | "%<__attribute__%>"); | |
2698 | break; | |
2699 | } | |
2700 | } | |
2701 | return decls; | |
2702 | } | |
2703 | ||
2704 | /* Parse a typeof specifier (a GNU extension). | |
2705 | ||
2706 | typeof-specifier: | |
2707 | typeof ( expression ) | |
2708 | typeof ( type-name ) | |
2709 | */ | |
2710 | ||
2711 | static struct c_typespec | |
2712 | c_parser_typeof_specifier (c_parser *parser) | |
2713 | { | |
2714 | struct c_typespec ret; | |
2715 | ret.kind = ctsk_typeof; | |
2716 | ret.spec = error_mark_node; | |
a75b1c71 | 2717 | ret.expr = NULL_TREE; |
2718 | ret.expr_const_operands = true; | |
1576dec7 | 2719 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF)); |
2720 | c_parser_consume_token (parser); | |
48d94ede | 2721 | c_inhibit_evaluation_warnings++; |
1576dec7 | 2722 | in_typeof++; |
2723 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2724 | { | |
48d94ede | 2725 | c_inhibit_evaluation_warnings--; |
1576dec7 | 2726 | in_typeof--; |
2727 | return ret; | |
2728 | } | |
26ee9e7a | 2729 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_id)) |
1576dec7 | 2730 | { |
2731 | struct c_type_name *type = c_parser_type_name (parser); | |
48d94ede | 2732 | c_inhibit_evaluation_warnings--; |
1576dec7 | 2733 | in_typeof--; |
2734 | if (type != NULL) | |
2735 | { | |
a75b1c71 | 2736 | ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands); |
1576dec7 | 2737 | pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE)); |
2738 | } | |
2739 | } | |
2740 | else | |
2741 | { | |
32d33ab2 | 2742 | bool was_vm; |
be9eba16 | 2743 | location_t here = c_parser_peek_token (parser)->location; |
1576dec7 | 2744 | struct c_expr expr = c_parser_expression (parser); |
48d94ede | 2745 | c_inhibit_evaluation_warnings--; |
1576dec7 | 2746 | in_typeof--; |
2747 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
2748 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
e3b80d49 | 2749 | error_at (here, "%<typeof%> applied to a bit-field"); |
abc6c64f | 2750 | mark_exp_read (expr.value); |
1576dec7 | 2751 | ret.spec = TREE_TYPE (expr.value); |
32d33ab2 | 2752 | was_vm = variably_modified_type_p (ret.spec, NULL_TREE); |
a75b1c71 | 2753 | /* This is returned with the type so that when the type is |
2754 | evaluated, this can be evaluated. */ | |
2755 | if (was_vm) | |
2756 | ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands); | |
32d33ab2 | 2757 | pop_maybe_used (was_vm); |
1576dec7 | 2758 | } |
2759 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2760 | return ret; | |
2761 | } | |
2762 | ||
83e25171 | 2763 | /* Parse an alignment-specifier. |
2764 | ||
2765 | C1X 6.7.5: | |
2766 | ||
2767 | alignment-specifier: | |
2768 | _Alignas ( type-name ) | |
2769 | _Alignas ( constant-expression ) | |
2770 | */ | |
2771 | ||
2772 | static tree | |
2773 | c_parser_alignas_specifier (c_parser * parser) | |
2774 | { | |
2775 | tree ret = error_mark_node; | |
2776 | location_t loc = c_parser_peek_token (parser)->location; | |
2777 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNAS)); | |
2778 | c_parser_consume_token (parser); | |
2779 | if (!flag_isoc1x) | |
2780 | { | |
2781 | if (flag_isoc99) | |
2782 | pedwarn (loc, OPT_pedantic, | |
2783 | "ISO C99 does not support %<_Alignas%>"); | |
2784 | else | |
2785 | pedwarn (loc, OPT_pedantic, | |
2786 | "ISO C90 does not support %<_Alignas%>"); | |
2787 | } | |
2788 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2789 | return ret; | |
2790 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_id)) | |
2791 | { | |
2792 | struct c_type_name *type = c_parser_type_name (parser); | |
2793 | if (type != NULL) | |
2794 | ret = c_alignof (loc, groktypename (type, NULL, NULL)); | |
2795 | } | |
2796 | else | |
2797 | ret = c_parser_expr_no_commas (parser, NULL).value; | |
2798 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2799 | return ret; | |
2800 | } | |
2801 | ||
1576dec7 | 2802 | /* Parse a declarator, possibly an abstract declarator (C90 6.5.4, |
2803 | 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may | |
2804 | be redeclared; otherwise it may not. KIND indicates which kind of | |
2805 | declarator is wanted. Returns a valid declarator except in the | |
2806 | case of a syntax error in which case NULL is returned. *SEEN_ID is | |
2807 | set to true if an identifier being declared is seen; this is used | |
2808 | to diagnose bad forms of abstract array declarators and to | |
2809 | determine whether an identifier list is syntactically permitted. | |
2810 | ||
2811 | declarator: | |
2812 | pointer[opt] direct-declarator | |
2813 | ||
2814 | direct-declarator: | |
2815 | identifier | |
2816 | ( attributes[opt] declarator ) | |
2817 | direct-declarator array-declarator | |
2818 | direct-declarator ( parameter-type-list ) | |
2819 | direct-declarator ( identifier-list[opt] ) | |
2820 | ||
2821 | pointer: | |
2822 | * type-qualifier-list[opt] | |
2823 | * type-qualifier-list[opt] pointer | |
2824 | ||
2825 | type-qualifier-list: | |
2826 | type-qualifier | |
2827 | attributes | |
2828 | type-qualifier-list type-qualifier | |
2829 | type-qualifier-list attributes | |
2830 | ||
2831 | parameter-type-list: | |
2832 | parameter-list | |
2833 | parameter-list , ... | |
2834 | ||
2835 | parameter-list: | |
2836 | parameter-declaration | |
2837 | parameter-list , parameter-declaration | |
2838 | ||
2839 | parameter-declaration: | |
2840 | declaration-specifiers declarator attributes[opt] | |
2841 | declaration-specifiers abstract-declarator[opt] attributes[opt] | |
2842 | ||
2843 | identifier-list: | |
2844 | identifier | |
2845 | identifier-list , identifier | |
2846 | ||
2847 | abstract-declarator: | |
2848 | pointer | |
2849 | pointer[opt] direct-abstract-declarator | |
2850 | ||
2851 | direct-abstract-declarator: | |
2852 | ( attributes[opt] abstract-declarator ) | |
2853 | direct-abstract-declarator[opt] array-declarator | |
2854 | direct-abstract-declarator[opt] ( parameter-type-list[opt] ) | |
2855 | ||
2856 | GNU extensions: | |
2857 | ||
2858 | direct-declarator: | |
2859 | direct-declarator ( parameter-forward-declarations | |
2860 | parameter-type-list[opt] ) | |
2861 | ||
2862 | direct-abstract-declarator: | |
a0c938f0 | 2863 | direct-abstract-declarator[opt] ( parameter-forward-declarations |
1576dec7 | 2864 | parameter-type-list[opt] ) |
2865 | ||
2866 | parameter-forward-declarations: | |
2867 | parameter-list ; | |
2868 | parameter-forward-declarations parameter-list ; | |
2869 | ||
2870 | The uses of attributes shown above are GNU extensions. | |
2871 | ||
2872 | Some forms of array declarator are not included in C99 in the | |
2873 | syntax for abstract declarators; these are disallowed elsewhere. | |
2874 | This may be a defect (DR#289). | |
2875 | ||
2876 | This function also accepts an omitted abstract declarator as being | |
2877 | an abstract declarator, although not part of the formal syntax. */ | |
2878 | ||
2879 | static struct c_declarator * | |
2880 | c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2881 | bool *seen_id) | |
2882 | { | |
2883 | /* Parse any initial pointer part. */ | |
2884 | if (c_parser_next_token_is (parser, CPP_MULT)) | |
2885 | { | |
2886 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2887 | struct c_declarator *inner; | |
2888 | c_parser_consume_token (parser); | |
26ee9e7a | 2889 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
1576dec7 | 2890 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); |
2891 | if (inner == NULL) | |
2892 | return NULL; | |
2893 | else | |
2894 | return make_pointer_declarator (quals_attrs, inner); | |
2895 | } | |
2896 | /* Now we have a direct declarator, direct abstract declarator or | |
2897 | nothing (which counts as a direct abstract declarator here). */ | |
2898 | return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id); | |
2899 | } | |
2900 | ||
2901 | /* Parse a direct declarator or direct abstract declarator; arguments | |
2902 | as c_parser_declarator. */ | |
2903 | ||
2904 | static struct c_declarator * | |
2905 | c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2906 | bool *seen_id) | |
2907 | { | |
2908 | /* The direct declarator must start with an identifier (possibly | |
2909 | omitted) or a parenthesized declarator (possibly abstract). In | |
2910 | an ordinary declarator, initial parentheses must start a | |
2911 | parenthesized declarator. In an abstract declarator or parameter | |
2912 | declarator, they could start a parenthesized declarator or a | |
2913 | parameter list. To tell which, the open parenthesis and any | |
2914 | following attributes must be read. If a declaration specifier | |
2915 | follows, then it is a parameter list; if the specifier is a | |
2916 | typedef name, there might be an ambiguity about redeclaring it, | |
2917 | which is resolved in the direction of treating it as a typedef | |
2918 | name. If a close parenthesis follows, it is also an empty | |
2919 | parameter list, as the syntax does not permit empty abstract | |
442e3cb9 | 2920 | declarators. Otherwise, it is a parenthesized declarator (in |
1576dec7 | 2921 | which case the analysis may be repeated inside it, recursively). |
2922 | ||
2923 | ??? There is an ambiguity in a parameter declaration "int | |
2924 | (__attribute__((foo)) x)", where x is not a typedef name: it | |
2925 | could be an abstract declarator for a function, or declare x with | |
2926 | parentheses. The proper resolution of this ambiguity needs | |
2927 | documenting. At present we follow an accident of the old | |
2928 | parser's implementation, whereby the first parameter must have | |
2929 | some declaration specifiers other than just attributes. Thus as | |
442e3cb9 | 2930 | a parameter declaration it is treated as a parenthesized |
1576dec7 | 2931 | parameter named x, and as an abstract declarator it is |
2932 | rejected. | |
2933 | ||
2934 | ??? Also following the old parser, attributes inside an empty | |
2935 | parameter list are ignored, making it a list not yielding a | |
2936 | prototype, rather than giving an error or making it have one | |
2937 | parameter with implicit type int. | |
2938 | ||
2939 | ??? Also following the old parser, typedef names may be | |
2940 | redeclared in declarators, but not Objective-C class names. */ | |
2941 | ||
2942 | if (kind != C_DTR_ABSTRACT | |
2943 | && c_parser_next_token_is (parser, CPP_NAME) | |
2944 | && ((type_seen_p | |
e147d6aa | 2945 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME |
2946 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
1576dec7 | 2947 | || c_parser_peek_token (parser)->id_kind == C_ID_ID)) |
2948 | { | |
2949 | struct c_declarator *inner | |
2950 | = build_id_declarator (c_parser_peek_token (parser)->value); | |
2951 | *seen_id = true; | |
6342afac | 2952 | inner->id_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 2953 | c_parser_consume_token (parser); |
2954 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2955 | } | |
2956 | ||
2957 | if (kind != C_DTR_NORMAL | |
2958 | && c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2959 | { | |
2960 | struct c_declarator *inner = build_id_declarator (NULL_TREE); | |
2961 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2962 | } | |
2963 | ||
2964 | /* Either we are at the end of an abstract declarator, or we have | |
2965 | parentheses. */ | |
2966 | ||
2967 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2968 | { | |
2969 | tree attrs; | |
2970 | struct c_declarator *inner; | |
2971 | c_parser_consume_token (parser); | |
2972 | attrs = c_parser_attributes (parser); | |
2973 | if (kind != C_DTR_NORMAL | |
2974 | && (c_parser_next_token_starts_declspecs (parser) | |
2975 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))) | |
2976 | { | |
2977 | struct c_arg_info *args | |
2978 | = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL, | |
2979 | attrs); | |
2980 | if (args == NULL) | |
2981 | return NULL; | |
2982 | else | |
2983 | { | |
2984 | inner | |
2985 | = build_function_declarator (args, | |
2986 | build_id_declarator (NULL_TREE)); | |
2987 | return c_parser_direct_declarator_inner (parser, *seen_id, | |
2988 | inner); | |
2989 | } | |
2990 | } | |
2991 | /* A parenthesized declarator. */ | |
2992 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
2993 | if (inner != NULL && attrs != NULL) | |
2994 | inner = build_attrs_declarator (attrs, inner); | |
2995 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
2996 | { | |
2997 | c_parser_consume_token (parser); | |
2998 | if (inner == NULL) | |
2999 | return NULL; | |
3000 | else | |
3001 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
3002 | } | |
3003 | else | |
3004 | { | |
3005 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3006 | "expected %<)%>"); | |
3007 | return NULL; | |
3008 | } | |
3009 | } | |
3010 | else | |
3011 | { | |
3012 | if (kind == C_DTR_NORMAL) | |
3013 | { | |
3014 | c_parser_error (parser, "expected identifier or %<(%>"); | |
3015 | return NULL; | |
3016 | } | |
3017 | else | |
3018 | return build_id_declarator (NULL_TREE); | |
3019 | } | |
3020 | } | |
3021 | ||
3022 | /* Parse part of a direct declarator or direct abstract declarator, | |
3023 | given that some (in INNER) has already been parsed; ID_PRESENT is | |
3024 | true if an identifier is present, false for an abstract | |
3025 | declarator. */ | |
3026 | ||
3027 | static struct c_declarator * | |
3028 | c_parser_direct_declarator_inner (c_parser *parser, bool id_present, | |
3029 | struct c_declarator *inner) | |
3030 | { | |
3031 | /* Parse a sequence of array declarators and parameter lists. */ | |
3032 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
3033 | { | |
48e1416a | 3034 | location_t brace_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 3035 | struct c_declarator *declarator; |
3036 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
3037 | bool static_seen; | |
3038 | bool star_seen; | |
3039 | tree dimen; | |
3040 | c_parser_consume_token (parser); | |
26ee9e7a | 3041 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
1576dec7 | 3042 | static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC); |
3043 | if (static_seen) | |
3044 | c_parser_consume_token (parser); | |
3045 | if (static_seen && !quals_attrs->declspecs_seen_p) | |
26ee9e7a | 3046 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
1576dec7 | 3047 | if (!quals_attrs->declspecs_seen_p) |
3048 | quals_attrs = NULL; | |
3049 | /* If "static" is present, there must be an array dimension. | |
3050 | Otherwise, there may be a dimension, "*", or no | |
3051 | dimension. */ | |
3052 | if (static_seen) | |
3053 | { | |
3054 | star_seen = false; | |
3055 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3056 | } | |
3057 | else | |
3058 | { | |
3059 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3060 | { | |
3061 | dimen = NULL_TREE; | |
3062 | star_seen = false; | |
3063 | } | |
3064 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
3065 | { | |
3066 | if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE) | |
3067 | { | |
3068 | dimen = NULL_TREE; | |
3069 | star_seen = true; | |
3070 | c_parser_consume_token (parser); | |
3071 | } | |
3072 | else | |
3073 | { | |
3074 | star_seen = false; | |
3075 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3076 | } | |
3077 | } | |
3078 | else | |
3079 | { | |
3080 | star_seen = false; | |
3081 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3082 | } | |
3083 | } | |
3084 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3085 | c_parser_consume_token (parser); | |
3086 | else | |
3087 | { | |
3088 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3089 | "expected %<]%>"); | |
3090 | return NULL; | |
3091 | } | |
4516a56b | 3092 | if (dimen) |
3093 | mark_exp_read (dimen); | |
e60a6f7b | 3094 | declarator = build_array_declarator (brace_loc, dimen, quals_attrs, |
3095 | static_seen, star_seen); | |
32d33ab2 | 3096 | if (declarator == NULL) |
3097 | return NULL; | |
e6c172ed | 3098 | inner = set_array_declarator_inner (declarator, inner); |
1576dec7 | 3099 | return c_parser_direct_declarator_inner (parser, id_present, inner); |
3100 | } | |
3101 | else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
3102 | { | |
3103 | tree attrs; | |
3104 | struct c_arg_info *args; | |
3105 | c_parser_consume_token (parser); | |
3106 | attrs = c_parser_attributes (parser); | |
3107 | args = c_parser_parms_declarator (parser, id_present, attrs); | |
3108 | if (args == NULL) | |
3109 | return NULL; | |
3110 | else | |
3111 | { | |
3112 | inner = build_function_declarator (args, inner); | |
3113 | return c_parser_direct_declarator_inner (parser, id_present, inner); | |
3114 | } | |
3115 | } | |
3116 | return inner; | |
3117 | } | |
3118 | ||
3119 | /* Parse a parameter list or identifier list, including the closing | |
3120 | parenthesis but not the opening one. ATTRS are the attributes at | |
3121 | the start of the list. ID_LIST_OK is true if an identifier list is | |
3122 | acceptable; such a list must not have attributes at the start. */ | |
3123 | ||
3124 | static struct c_arg_info * | |
3125 | c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs) | |
3126 | { | |
3127 | push_scope (); | |
3128 | declare_parm_level (); | |
3129 | /* If the list starts with an identifier, it is an identifier list. | |
3130 | Otherwise, it is either a prototype list or an empty list. */ | |
3131 | if (id_list_ok | |
3132 | && !attrs | |
3133 | && c_parser_next_token_is (parser, CPP_NAME) | |
26ee9e7a | 3134 | && c_parser_peek_token (parser)->id_kind == C_ID_ID |
3135 | ||
3136 | /* Look ahead to detect typos in type names. */ | |
3137 | && c_parser_peek_2nd_token (parser)->type != CPP_NAME | |
3138 | && c_parser_peek_2nd_token (parser)->type != CPP_MULT | |
3139 | && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_PAREN | |
3140 | && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_SQUARE) | |
1576dec7 | 3141 | { |
caa9f6a7 | 3142 | tree list = NULL_TREE, *nextp = &list; |
1576dec7 | 3143 | while (c_parser_next_token_is (parser, CPP_NAME) |
3144 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
3145 | { | |
caa9f6a7 | 3146 | *nextp = build_tree_list (NULL_TREE, |
3147 | c_parser_peek_token (parser)->value); | |
3148 | nextp = & TREE_CHAIN (*nextp); | |
1576dec7 | 3149 | c_parser_consume_token (parser); |
3150 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
3151 | break; | |
3152 | c_parser_consume_token (parser); | |
3153 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3154 | { | |
3155 | c_parser_error (parser, "expected identifier"); | |
3156 | break; | |
3157 | } | |
3158 | } | |
3159 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3160 | { | |
cfbfcd0b | 3161 | struct c_arg_info *ret = build_arg_info (); |
1576dec7 | 3162 | ret->types = list; |
1576dec7 | 3163 | c_parser_consume_token (parser); |
3164 | pop_scope (); | |
3165 | return ret; | |
3166 | } | |
3167 | else | |
3168 | { | |
3169 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3170 | "expected %<)%>"); | |
3171 | pop_scope (); | |
3172 | return NULL; | |
3173 | } | |
3174 | } | |
3175 | else | |
3176 | { | |
4232a958 | 3177 | struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs, |
3178 | NULL); | |
1576dec7 | 3179 | pop_scope (); |
3180 | return ret; | |
3181 | } | |
3182 | } | |
3183 | ||
3184 | /* Parse a parameter list (possibly empty), including the closing | |
3185 | parenthesis but not the opening one. ATTRS are the attributes at | |
4232a958 | 3186 | the start of the list. EXPR is NULL or an expression that needs to |
3187 | be evaluated for the side effects of array size expressions in the | |
3188 | parameters. */ | |
1576dec7 | 3189 | |
3190 | static struct c_arg_info * | |
4232a958 | 3191 | c_parser_parms_list_declarator (c_parser *parser, tree attrs, tree expr) |
1576dec7 | 3192 | { |
0e28b26d | 3193 | bool bad_parm = false; |
4232a958 | 3194 | |
1576dec7 | 3195 | /* ??? Following the old parser, forward parameter declarations may |
3196 | use abstract declarators, and if no real parameter declarations | |
3197 | follow the forward declarations then this is not diagnosed. Also | |
3198 | note as above that attributes are ignored as the only contents of | |
3199 | the parentheses, or as the only contents after forward | |
3200 | declarations. */ | |
3201 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3202 | { | |
cfbfcd0b | 3203 | struct c_arg_info *ret = build_arg_info (); |
1576dec7 | 3204 | c_parser_consume_token (parser); |
3205 | return ret; | |
3206 | } | |
3207 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3208 | { | |
cfbfcd0b | 3209 | struct c_arg_info *ret = build_arg_info (); |
c7964868 | 3210 | |
3211 | if (flag_allow_parameterless_variadic_functions) | |
3212 | { | |
3213 | /* F (...) is allowed. */ | |
3214 | ret->types = NULL_TREE; | |
3215 | } | |
3216 | else | |
3217 | { | |
3218 | /* Suppress -Wold-style-definition for this case. */ | |
3219 | ret->types = error_mark_node; | |
3220 | error_at (c_parser_peek_token (parser)->location, | |
3221 | "ISO C requires a named argument before %<...%>"); | |
3222 | } | |
1576dec7 | 3223 | c_parser_consume_token (parser); |
3224 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3225 | { | |
3226 | c_parser_consume_token (parser); | |
3227 | return ret; | |
3228 | } | |
3229 | else | |
3230 | { | |
3231 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3232 | "expected %<)%>"); | |
3233 | return NULL; | |
3234 | } | |
3235 | } | |
3236 | /* Nonempty list of parameters, either terminated with semicolon | |
3237 | (forward declarations; recurse) or with close parenthesis (normal | |
3238 | function) or with ", ... )" (variadic function). */ | |
3239 | while (true) | |
3240 | { | |
3241 | /* Parse a parameter. */ | |
3242 | struct c_parm *parm = c_parser_parameter_declaration (parser, attrs); | |
3243 | attrs = NULL_TREE; | |
0e28b26d | 3244 | if (parm == NULL) |
3245 | bad_parm = true; | |
3246 | else | |
4232a958 | 3247 | push_parm_decl (parm, &expr); |
1576dec7 | 3248 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3249 | { | |
3250 | tree new_attrs; | |
3251 | c_parser_consume_token (parser); | |
c4a8f0ba | 3252 | mark_forward_parm_decls (); |
1576dec7 | 3253 | new_attrs = c_parser_attributes (parser); |
4232a958 | 3254 | return c_parser_parms_list_declarator (parser, new_attrs, expr); |
1576dec7 | 3255 | } |
3256 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3257 | { | |
3258 | c_parser_consume_token (parser); | |
0e28b26d | 3259 | if (bad_parm) |
4232a958 | 3260 | return NULL; |
0e28b26d | 3261 | else |
4232a958 | 3262 | return get_parm_info (false, expr); |
1576dec7 | 3263 | } |
3264 | if (!c_parser_require (parser, CPP_COMMA, | |
3265 | "expected %<;%>, %<,%> or %<)%>")) | |
3266 | { | |
3267 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
3268 | return NULL; | |
3269 | } | |
3270 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3271 | { | |
3272 | c_parser_consume_token (parser); | |
3273 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3274 | { | |
3275 | c_parser_consume_token (parser); | |
0e28b26d | 3276 | if (bad_parm) |
4232a958 | 3277 | return NULL; |
0e28b26d | 3278 | else |
4232a958 | 3279 | return get_parm_info (true, expr); |
1576dec7 | 3280 | } |
3281 | else | |
3282 | { | |
3283 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3284 | "expected %<)%>"); | |
3285 | return NULL; | |
3286 | } | |
3287 | } | |
3288 | } | |
3289 | } | |
3290 | ||
3291 | /* Parse a parameter declaration. ATTRS are the attributes at the | |
3292 | start of the declaration if it is the first parameter. */ | |
3293 | ||
3294 | static struct c_parm * | |
3295 | c_parser_parameter_declaration (c_parser *parser, tree attrs) | |
3296 | { | |
3297 | struct c_declspecs *specs; | |
3298 | struct c_declarator *declarator; | |
3299 | tree prefix_attrs; | |
3300 | tree postfix_attrs = NULL_TREE; | |
3301 | bool dummy = false; | |
3302 | if (!c_parser_next_token_starts_declspecs (parser)) | |
3303 | { | |
0e28b26d | 3304 | c_token *token = c_parser_peek_token (parser); |
3305 | if (parser->error) | |
3306 | return NULL; | |
3307 | c_parser_set_source_position_from_token (token); | |
26ee9e7a | 3308 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_type)) |
0e28b26d | 3309 | { |
3310 | error ("unknown type name %qE", token->value); | |
3311 | parser->error = true; | |
3312 | } | |
1576dec7 | 3313 | /* ??? In some Objective-C cases '...' isn't applicable so there |
3314 | should be a different message. */ | |
0e28b26d | 3315 | else |
3316 | c_parser_error (parser, | |
3317 | "expected declaration specifiers or %<...%>"); | |
1576dec7 | 3318 | c_parser_skip_to_end_of_parameter (parser); |
3319 | return NULL; | |
3320 | } | |
3321 | specs = build_null_declspecs (); | |
3322 | if (attrs) | |
3323 | { | |
3324 | declspecs_add_attrs (specs, attrs); | |
3325 | attrs = NULL_TREE; | |
3326 | } | |
26ee9e7a | 3327 | c_parser_declspecs (parser, specs, true, true, true, cla_nonabstract_decl); |
1576dec7 | 3328 | finish_declspecs (specs); |
3329 | pending_xref_error (); | |
3330 | prefix_attrs = specs->attrs; | |
3331 | specs->attrs = NULL_TREE; | |
ae5ead32 | 3332 | declarator = c_parser_declarator (parser, |
3333 | specs->typespec_kind != ctsk_none, | |
1576dec7 | 3334 | C_DTR_PARM, &dummy); |
3335 | if (declarator == NULL) | |
3336 | { | |
3337 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
3338 | return NULL; | |
3339 | } | |
3340 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
3341 | postfix_attrs = c_parser_attributes (parser); | |
3342 | return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs), | |
3343 | declarator); | |
3344 | } | |
3345 | ||
3346 | /* Parse a string literal in an asm expression. It should not be | |
3347 | translated, and wide string literals are an error although | |
3348 | permitted by the syntax. This is a GNU extension. | |
3349 | ||
3350 | asm-string-literal: | |
3351 | string-literal | |
3352 | ||
3353 | ??? At present, following the old parser, the caller needs to have | |
8115b8be | 3354 | set lex_untranslated_string to 1. It would be better to follow the |
3355 | C++ parser rather than using this kludge. */ | |
1576dec7 | 3356 | |
3357 | static tree | |
3358 | c_parser_asm_string_literal (c_parser *parser) | |
3359 | { | |
3360 | tree str; | |
88c86c27 | 3361 | int save_flag = warn_overlength_strings; |
3362 | warn_overlength_strings = 0; | |
1576dec7 | 3363 | if (c_parser_next_token_is (parser, CPP_STRING)) |
3364 | { | |
3365 | str = c_parser_peek_token (parser)->value; | |
3366 | c_parser_consume_token (parser); | |
3367 | } | |
3368 | else if (c_parser_next_token_is (parser, CPP_WSTRING)) | |
3369 | { | |
e3b80d49 | 3370 | error_at (c_parser_peek_token (parser)->location, |
3371 | "wide string literal in %<asm%>"); | |
1576dec7 | 3372 | str = build_string (1, ""); |
3373 | c_parser_consume_token (parser); | |
3374 | } | |
3375 | else | |
3376 | { | |
3377 | c_parser_error (parser, "expected string literal"); | |
3378 | str = NULL_TREE; | |
3379 | } | |
88c86c27 | 3380 | warn_overlength_strings = save_flag; |
1576dec7 | 3381 | return str; |
3382 | } | |
3383 | ||
3384 | /* Parse a simple asm expression. This is used in restricted | |
3385 | contexts, where a full expression with inputs and outputs does not | |
3386 | make sense. This is a GNU extension. | |
3387 | ||
3388 | simple-asm-expr: | |
3389 | asm ( asm-string-literal ) | |
3390 | */ | |
3391 | ||
3392 | static tree | |
3393 | c_parser_simple_asm_expr (c_parser *parser) | |
3394 | { | |
3395 | tree str; | |
3396 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
3397 | /* ??? Follow the C++ parser rather than using the | |
8115b8be | 3398 | lex_untranslated_string kludge. */ |
3399 | parser->lex_untranslated_string = true; | |
1576dec7 | 3400 | c_parser_consume_token (parser); |
3401 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3402 | { | |
8115b8be | 3403 | parser->lex_untranslated_string = false; |
1576dec7 | 3404 | return NULL_TREE; |
3405 | } | |
3406 | str = c_parser_asm_string_literal (parser); | |
8115b8be | 3407 | parser->lex_untranslated_string = false; |
1576dec7 | 3408 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
3409 | { | |
3410 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
3411 | return NULL_TREE; | |
3412 | } | |
3413 | return str; | |
3414 | } | |
3415 | ||
3416 | /* Parse (possibly empty) attributes. This is a GNU extension. | |
3417 | ||
3418 | attributes: | |
3419 | empty | |
3420 | attributes attribute | |
3421 | ||
3422 | attribute: | |
3423 | __attribute__ ( ( attribute-list ) ) | |
3424 | ||
3425 | attribute-list: | |
3426 | attrib | |
3427 | attribute_list , attrib | |
3428 | ||
3429 | attrib: | |
3430 | empty | |
3431 | any-word | |
3432 | any-word ( identifier ) | |
3433 | any-word ( identifier , nonempty-expr-list ) | |
3434 | any-word ( expr-list ) | |
3435 | ||
3436 | where the "identifier" must not be declared as a type, and | |
3437 | "any-word" may be any identifier (including one declared as a | |
3438 | type), a reserved word storage class specifier, type specifier or | |
3439 | type qualifier. ??? This still leaves out most reserved keywords | |
3440 | (following the old parser), shouldn't we include them, and why not | |
3441 | allow identifiers declared as types to start the arguments? */ | |
3442 | ||
3443 | static tree | |
3444 | c_parser_attributes (c_parser *parser) | |
3445 | { | |
3446 | tree attrs = NULL_TREE; | |
3447 | while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
3448 | { | |
3449 | /* ??? Follow the C++ parser rather than using the | |
8115b8be | 3450 | lex_untranslated_string kludge. */ |
3451 | parser->lex_untranslated_string = true; | |
1576dec7 | 3452 | c_parser_consume_token (parser); |
3453 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3454 | { | |
8115b8be | 3455 | parser->lex_untranslated_string = false; |
1576dec7 | 3456 | return attrs; |
3457 | } | |
3458 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3459 | { | |
8115b8be | 3460 | parser->lex_untranslated_string = false; |
1576dec7 | 3461 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
3462 | return attrs; | |
3463 | } | |
3464 | /* Parse the attribute list. */ | |
3465 | while (c_parser_next_token_is (parser, CPP_COMMA) | |
3466 | || c_parser_next_token_is (parser, CPP_NAME) | |
3467 | || c_parser_next_token_is (parser, CPP_KEYWORD)) | |
3468 | { | |
3469 | tree attr, attr_name, attr_args; | |
b9c74b4d | 3470 | VEC(tree,gc) *expr_list; |
1576dec7 | 3471 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
3472 | { | |
3473 | c_parser_consume_token (parser); | |
3474 | continue; | |
3475 | } | |
3476 | if (c_parser_next_token_is (parser, CPP_KEYWORD)) | |
3477 | { | |
3478 | /* ??? See comment above about what keywords are | |
3479 | accepted here. */ | |
3480 | bool ok; | |
3481 | switch (c_parser_peek_token (parser)->keyword) | |
3482 | { | |
3483 | case RID_STATIC: | |
3484 | case RID_UNSIGNED: | |
3485 | case RID_LONG: | |
6388cfe2 | 3486 | case RID_INT128: |
1576dec7 | 3487 | case RID_CONST: |
3488 | case RID_EXTERN: | |
3489 | case RID_REGISTER: | |
3490 | case RID_TYPEDEF: | |
3491 | case RID_SHORT: | |
3492 | case RID_INLINE: | |
985c6e3a | 3493 | case RID_NORETURN: |
1576dec7 | 3494 | case RID_VOLATILE: |
3495 | case RID_SIGNED: | |
3496 | case RID_AUTO: | |
3497 | case RID_RESTRICT: | |
3498 | case RID_COMPLEX: | |
3499 | case RID_THREAD: | |
3500 | case RID_INT: | |
3501 | case RID_CHAR: | |
3502 | case RID_FLOAT: | |
3503 | case RID_DOUBLE: | |
3504 | case RID_VOID: | |
c4503c0a | 3505 | case RID_DFLOAT32: |
3506 | case RID_DFLOAT64: | |
3507 | case RID_DFLOAT128: | |
1576dec7 | 3508 | case RID_BOOL: |
9421ebb9 | 3509 | case RID_FRACT: |
3510 | case RID_ACCUM: | |
3511 | case RID_SAT: | |
1576dec7 | 3512 | ok = true; |
3513 | break; | |
3514 | default: | |
3515 | ok = false; | |
3516 | break; | |
3517 | } | |
3518 | if (!ok) | |
3519 | break; | |
594dfd1f | 3520 | /* Accept __attribute__((__const)) as __attribute__((const)) |
3521 | etc. */ | |
3522 | attr_name | |
3523 | = ridpointers[(int) c_parser_peek_token (parser)->keyword]; | |
1576dec7 | 3524 | } |
594dfd1f | 3525 | else |
3526 | attr_name = c_parser_peek_token (parser)->value; | |
1576dec7 | 3527 | c_parser_consume_token (parser); |
3528 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) | |
3529 | { | |
3530 | attr = build_tree_list (attr_name, NULL_TREE); | |
3531 | attrs = chainon (attrs, attr); | |
3532 | continue; | |
3533 | } | |
3534 | c_parser_consume_token (parser); | |
3535 | /* Parse the attribute contents. If they start with an | |
3536 | identifier which is followed by a comma or close | |
3537 | parenthesis, then the arguments start with that | |
1f6616ee | 3538 | identifier; otherwise they are an expression list. |
3539 | In objective-c the identifier may be a classname. */ | |
1576dec7 | 3540 | if (c_parser_next_token_is (parser, CPP_NAME) |
1f6616ee | 3541 | && (c_parser_peek_token (parser)->id_kind == C_ID_ID |
3542 | || (c_dialect_objc () | |
3543 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
1576dec7 | 3544 | && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA) |
3545 | || (c_parser_peek_2nd_token (parser)->type | |
3546 | == CPP_CLOSE_PAREN))) | |
3547 | { | |
3548 | tree arg1 = c_parser_peek_token (parser)->value; | |
3549 | c_parser_consume_token (parser); | |
3550 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3551 | attr_args = build_tree_list (NULL_TREE, arg1); | |
3552 | else | |
3553 | { | |
b9c74b4d | 3554 | tree tree_list; |
1576dec7 | 3555 | c_parser_consume_token (parser); |
b9c74b4d | 3556 | expr_list = c_parser_expr_list (parser, false, true, NULL); |
f352a3fb | 3557 | tree_list = build_tree_list_vec (expr_list); |
b9c74b4d | 3558 | attr_args = tree_cons (NULL_TREE, arg1, tree_list); |
f352a3fb | 3559 | release_tree_vector (expr_list); |
1576dec7 | 3560 | } |
3561 | } | |
3562 | else | |
3563 | { | |
3564 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3565 | attr_args = NULL_TREE; | |
3566 | else | |
b9c74b4d | 3567 | { |
3568 | expr_list = c_parser_expr_list (parser, false, true, NULL); | |
f352a3fb | 3569 | attr_args = build_tree_list_vec (expr_list); |
3570 | release_tree_vector (expr_list); | |
b9c74b4d | 3571 | } |
1576dec7 | 3572 | } |
3573 | attr = build_tree_list (attr_name, attr_args); | |
3574 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3575 | c_parser_consume_token (parser); | |
3576 | else | |
3577 | { | |
8115b8be | 3578 | parser->lex_untranslated_string = false; |
1576dec7 | 3579 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3580 | "expected %<)%>"); | |
3581 | return attrs; | |
3582 | } | |
3583 | attrs = chainon (attrs, attr); | |
3584 | } | |
3585 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3586 | c_parser_consume_token (parser); | |
3587 | else | |
3588 | { | |
8115b8be | 3589 | parser->lex_untranslated_string = false; |
1576dec7 | 3590 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3591 | "expected %<)%>"); | |
3592 | return attrs; | |
3593 | } | |
3594 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3595 | c_parser_consume_token (parser); | |
3596 | else | |
3597 | { | |
8115b8be | 3598 | parser->lex_untranslated_string = false; |
1576dec7 | 3599 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3600 | "expected %<)%>"); | |
3601 | return attrs; | |
3602 | } | |
8115b8be | 3603 | parser->lex_untranslated_string = false; |
1576dec7 | 3604 | } |
3605 | return attrs; | |
3606 | } | |
3607 | ||
3608 | /* Parse a type name (C90 6.5.5, C99 6.7.6). | |
3609 | ||
3610 | type-name: | |
3611 | specifier-qualifier-list abstract-declarator[opt] | |
3612 | */ | |
3613 | ||
3614 | static struct c_type_name * | |
3615 | c_parser_type_name (c_parser *parser) | |
3616 | { | |
3617 | struct c_declspecs *specs = build_null_declspecs (); | |
3618 | struct c_declarator *declarator; | |
3619 | struct c_type_name *ret; | |
3620 | bool dummy = false; | |
26ee9e7a | 3621 | c_parser_declspecs (parser, specs, false, true, true, cla_prefer_type); |
1576dec7 | 3622 | if (!specs->declspecs_seen_p) |
3623 | { | |
3624 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
3625 | return NULL; | |
3626 | } | |
26ee9e7a | 3627 | if (specs->type != error_mark_node) |
3628 | { | |
3629 | pending_xref_error (); | |
3630 | finish_declspecs (specs); | |
3631 | } | |
ae5ead32 | 3632 | declarator = c_parser_declarator (parser, |
3633 | specs->typespec_kind != ctsk_none, | |
1576dec7 | 3634 | C_DTR_ABSTRACT, &dummy); |
3635 | if (declarator == NULL) | |
3636 | return NULL; | |
3637 | ret = XOBNEW (&parser_obstack, struct c_type_name); | |
3638 | ret->specs = specs; | |
3639 | ret->declarator = declarator; | |
3640 | return ret; | |
3641 | } | |
3642 | ||
3643 | /* Parse an initializer (C90 6.5.7, C99 6.7.8). | |
3644 | ||
3645 | initializer: | |
3646 | assignment-expression | |
3647 | { initializer-list } | |
3648 | { initializer-list , } | |
3649 | ||
3650 | initializer-list: | |
3651 | designation[opt] initializer | |
3652 | initializer-list , designation[opt] initializer | |
3653 | ||
3654 | designation: | |
3655 | designator-list = | |
3656 | ||
3657 | designator-list: | |
3658 | designator | |
3659 | designator-list designator | |
3660 | ||
3661 | designator: | |
3662 | array-designator | |
3663 | . identifier | |
3664 | ||
3665 | array-designator: | |
3666 | [ constant-expression ] | |
3667 | ||
3668 | GNU extensions: | |
3669 | ||
3670 | initializer: | |
3671 | { } | |
3672 | ||
3673 | designation: | |
3674 | array-designator | |
3675 | identifier : | |
3676 | ||
3677 | array-designator: | |
3678 | [ constant-expression ... constant-expression ] | |
3679 | ||
3680 | Any expression without commas is accepted in the syntax for the | |
3681 | constant-expressions, with non-constant expressions rejected later. | |
3682 | ||
3683 | This function is only used for top-level initializers; for nested | |
3684 | ones, see c_parser_initval. */ | |
3685 | ||
3686 | static struct c_expr | |
3687 | c_parser_initializer (c_parser *parser) | |
3688 | { | |
3689 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3690 | return c_parser_braced_init (parser, NULL_TREE, false); | |
3691 | else | |
f14c8207 | 3692 | { |
3693 | struct c_expr ret; | |
e60a6f7b | 3694 | location_t loc = c_parser_peek_token (parser)->location; |
f14c8207 | 3695 | ret = c_parser_expr_no_commas (parser, NULL); |
3696 | if (TREE_CODE (ret.value) != STRING_CST | |
3697 | && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR) | |
abc6c64f | 3698 | ret = default_function_array_read_conversion (loc, ret); |
f14c8207 | 3699 | return ret; |
3700 | } | |
1576dec7 | 3701 | } |
3702 | ||
3703 | /* Parse a braced initializer list. TYPE is the type specified for a | |
3704 | compound literal, and NULL_TREE for other initializers and for | |
3705 | nested braced lists. NESTED_P is true for nested braced lists, | |
3706 | false for the list of a compound literal or the list that is the | |
3707 | top-level initializer in a declaration. */ | |
3708 | ||
3709 | static struct c_expr | |
3710 | c_parser_braced_init (c_parser *parser, tree type, bool nested_p) | |
3711 | { | |
759791ee | 3712 | struct c_expr ret; |
3713 | struct obstack braced_init_obstack; | |
be9eba16 | 3714 | location_t brace_loc = c_parser_peek_token (parser)->location; |
759791ee | 3715 | gcc_obstack_init (&braced_init_obstack); |
1576dec7 | 3716 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); |
3717 | c_parser_consume_token (parser); | |
3718 | if (nested_p) | |
759791ee | 3719 | push_init_level (0, &braced_init_obstack); |
1576dec7 | 3720 | else |
3721 | really_start_incremental_init (type); | |
3722 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3723 | { | |
21ca8540 | 3724 | pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces"); |
1576dec7 | 3725 | } |
3726 | else | |
3727 | { | |
3728 | /* Parse a non-empty initializer list, possibly with a trailing | |
3729 | comma. */ | |
3730 | while (true) | |
3731 | { | |
759791ee | 3732 | c_parser_initelt (parser, &braced_init_obstack); |
1576dec7 | 3733 | if (parser->error) |
3734 | break; | |
3735 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3736 | c_parser_consume_token (parser); | |
3737 | else | |
3738 | break; | |
3739 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3740 | break; | |
3741 | } | |
3742 | } | |
3743 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3744 | { | |
1576dec7 | 3745 | ret.value = error_mark_node; |
3746 | ret.original_code = ERROR_MARK; | |
841fdaa6 | 3747 | ret.original_type = NULL; |
1576dec7 | 3748 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>"); |
759791ee | 3749 | pop_init_level (0, &braced_init_obstack); |
3750 | obstack_free (&braced_init_obstack, NULL); | |
1576dec7 | 3751 | return ret; |
3752 | } | |
3753 | c_parser_consume_token (parser); | |
759791ee | 3754 | ret = pop_init_level (0, &braced_init_obstack); |
3755 | obstack_free (&braced_init_obstack, NULL); | |
3756 | return ret; | |
1576dec7 | 3757 | } |
3758 | ||
3759 | /* Parse a nested initializer, including designators. */ | |
3760 | ||
3761 | static void | |
759791ee | 3762 | c_parser_initelt (c_parser *parser, struct obstack * braced_init_obstack) |
1576dec7 | 3763 | { |
3764 | /* Parse any designator or designator list. A single array | |
3765 | designator may have the subsequent "=" omitted in GNU C, but a | |
3766 | longer list or a structure member designator may not. */ | |
3767 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3768 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
3769 | { | |
3770 | /* Old-style structure member designator. */ | |
759791ee | 3771 | set_init_label (c_parser_peek_token (parser)->value, |
3772 | braced_init_obstack); | |
8864917d | 3773 | /* Use the colon as the error location. */ |
48e1416a | 3774 | pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic, |
21ca8540 | 3775 | "obsolete use of designated initializer with %<:%>"); |
1576dec7 | 3776 | c_parser_consume_token (parser); |
3777 | c_parser_consume_token (parser); | |
3778 | } | |
3779 | else | |
3780 | { | |
3781 | /* des_seen is 0 if there have been no designators, 1 if there | |
3782 | has been a single array designator and 2 otherwise. */ | |
3783 | int des_seen = 0; | |
be9eba16 | 3784 | /* Location of a designator. */ |
019abced | 3785 | location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
1576dec7 | 3786 | while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE) |
3787 | || c_parser_next_token_is (parser, CPP_DOT)) | |
3788 | { | |
3789 | int des_prev = des_seen; | |
be9eba16 | 3790 | if (!des_seen) |
3791 | des_loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 3792 | if (des_seen < 2) |
3793 | des_seen++; | |
3794 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
3795 | { | |
3796 | des_seen = 2; | |
3797 | c_parser_consume_token (parser); | |
3798 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3799 | { | |
759791ee | 3800 | set_init_label (c_parser_peek_token (parser)->value, |
3801 | braced_init_obstack); | |
1576dec7 | 3802 | c_parser_consume_token (parser); |
3803 | } | |
3804 | else | |
3805 | { | |
3806 | struct c_expr init; | |
3807 | init.value = error_mark_node; | |
3808 | init.original_code = ERROR_MARK; | |
841fdaa6 | 3809 | init.original_type = NULL; |
1576dec7 | 3810 | c_parser_error (parser, "expected identifier"); |
3811 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
759791ee | 3812 | process_init_element (init, false, braced_init_obstack); |
1576dec7 | 3813 | return; |
3814 | } | |
3815 | } | |
3816 | else | |
3817 | { | |
3818 | tree first, second; | |
019abced | 3819 | location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
1576dec7 | 3820 | /* ??? Following the old parser, [ objc-receiver |
3821 | objc-message-args ] is accepted as an initializer, | |
3822 | being distinguished from a designator by what follows | |
3823 | the first assignment expression inside the square | |
3824 | brackets, but after a first array designator a | |
3825 | subsequent square bracket is for Objective-C taken to | |
3826 | start an expression, using the obsolete form of | |
3827 | designated initializer without '=', rather than | |
3828 | possibly being a second level of designation: in LALR | |
3829 | terms, the '[' is shifted rather than reducing | |
3830 | designator to designator-list. */ | |
3831 | if (des_prev == 1 && c_dialect_objc ()) | |
3832 | { | |
3833 | des_seen = des_prev; | |
3834 | break; | |
3835 | } | |
3836 | if (des_prev == 0 && c_dialect_objc ()) | |
3837 | { | |
3838 | /* This might be an array designator or an | |
3839 | Objective-C message expression. If the former, | |
3840 | continue parsing here; if the latter, parse the | |
3841 | remainder of the initializer given the starting | |
3842 | primary-expression. ??? It might make sense to | |
3843 | distinguish when des_prev == 1 as well; see | |
3844 | previous comment. */ | |
3845 | tree rec, args; | |
3846 | struct c_expr mexpr; | |
3847 | c_parser_consume_token (parser); | |
3848 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
3849 | && ((c_parser_peek_token (parser)->id_kind | |
3850 | == C_ID_TYPENAME) | |
3851 | || (c_parser_peek_token (parser)->id_kind | |
3852 | == C_ID_CLASSNAME))) | |
3853 | { | |
3854 | /* Type name receiver. */ | |
3855 | tree id = c_parser_peek_token (parser)->value; | |
3856 | c_parser_consume_token (parser); | |
3857 | rec = objc_get_class_reference (id); | |
3858 | goto parse_message_args; | |
3859 | } | |
3860 | first = c_parser_expr_no_commas (parser, NULL).value; | |
abc6c64f | 3861 | mark_exp_read (first); |
1576dec7 | 3862 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS) |
3863 | || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3864 | goto array_desig_after_first; | |
3865 | /* Expression receiver. So far only one part | |
3866 | without commas has been parsed; there might be | |
3867 | more of the expression. */ | |
3868 | rec = first; | |
3869 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
3870 | { | |
e78cf9a7 | 3871 | struct c_expr next; |
e60a6f7b | 3872 | location_t comma_loc, exp_loc; |
3873 | comma_loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 3874 | c_parser_consume_token (parser); |
e60a6f7b | 3875 | exp_loc = c_parser_peek_token (parser)->location; |
e78cf9a7 | 3876 | next = c_parser_expr_no_commas (parser, NULL); |
abc6c64f | 3877 | next = default_function_array_read_conversion (exp_loc, |
3878 | next); | |
e60a6f7b | 3879 | rec = build_compound_expr (comma_loc, rec, next.value); |
1576dec7 | 3880 | } |
3881 | parse_message_args: | |
3882 | /* Now parse the objc-message-args. */ | |
3883 | args = c_parser_objc_message_args (parser); | |
3884 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3885 | "expected %<]%>"); | |
3886 | mexpr.value | |
4185cf58 | 3887 | = objc_build_message_expr (rec, args); |
1576dec7 | 3888 | mexpr.original_code = ERROR_MARK; |
841fdaa6 | 3889 | mexpr.original_type = NULL; |
1576dec7 | 3890 | /* Now parse and process the remainder of the |
3891 | initializer, starting with this message | |
3892 | expression as a primary-expression. */ | |
759791ee | 3893 | c_parser_initval (parser, &mexpr, braced_init_obstack); |
1576dec7 | 3894 | return; |
3895 | } | |
3896 | c_parser_consume_token (parser); | |
3897 | first = c_parser_expr_no_commas (parser, NULL).value; | |
abc6c64f | 3898 | mark_exp_read (first); |
1576dec7 | 3899 | array_desig_after_first: |
3900 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3901 | { | |
be9eba16 | 3902 | ellipsis_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 3903 | c_parser_consume_token (parser); |
3904 | second = c_parser_expr_no_commas (parser, NULL).value; | |
abc6c64f | 3905 | mark_exp_read (second); |
1576dec7 | 3906 | } |
3907 | else | |
3908 | second = NULL_TREE; | |
3909 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3910 | { | |
3911 | c_parser_consume_token (parser); | |
759791ee | 3912 | set_init_index (first, second, braced_init_obstack); |
8864917d | 3913 | if (second) |
48e1416a | 3914 | pedwarn (ellipsis_loc, OPT_pedantic, |
21ca8540 | 3915 | "ISO C forbids specifying range of elements to initialize"); |
1576dec7 | 3916 | } |
3917 | else | |
3918 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3919 | "expected %<]%>"); | |
3920 | } | |
3921 | } | |
3922 | if (des_seen >= 1) | |
3923 | { | |
3924 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
3925 | { | |
8864917d | 3926 | if (!flag_isoc99) |
48e1416a | 3927 | pedwarn (des_loc, OPT_pedantic, |
21ca8540 | 3928 | "ISO C90 forbids specifying subobject to initialize"); |
1576dec7 | 3929 | c_parser_consume_token (parser); |
3930 | } | |
3931 | else | |
3932 | { | |
3933 | if (des_seen == 1) | |
48e1416a | 3934 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 3935 | "obsolete use of designated initializer without %<=%>"); |
1576dec7 | 3936 | else |
3937 | { | |
3938 | struct c_expr init; | |
3939 | init.value = error_mark_node; | |
3940 | init.original_code = ERROR_MARK; | |
841fdaa6 | 3941 | init.original_type = NULL; |
1576dec7 | 3942 | c_parser_error (parser, "expected %<=%>"); |
3943 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
759791ee | 3944 | process_init_element (init, false, braced_init_obstack); |
1576dec7 | 3945 | return; |
3946 | } | |
3947 | } | |
3948 | } | |
3949 | } | |
759791ee | 3950 | c_parser_initval (parser, NULL, braced_init_obstack); |
1576dec7 | 3951 | } |
3952 | ||
3953 | /* Parse a nested initializer; as c_parser_initializer but parses | |
3954 | initializers within braced lists, after any designators have been | |
3955 | applied. If AFTER is not NULL then it is an Objective-C message | |
3956 | expression which is the primary-expression starting the | |
3957 | initializer. */ | |
3958 | ||
3959 | static void | |
759791ee | 3960 | c_parser_initval (c_parser *parser, struct c_expr *after, |
3961 | struct obstack * braced_init_obstack) | |
1576dec7 | 3962 | { |
3963 | struct c_expr init; | |
3964 | gcc_assert (!after || c_dialect_objc ()); | |
3965 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after) | |
3966 | init = c_parser_braced_init (parser, NULL_TREE, true); | |
3967 | else | |
f14c8207 | 3968 | { |
e60a6f7b | 3969 | location_t loc = c_parser_peek_token (parser)->location; |
f14c8207 | 3970 | init = c_parser_expr_no_commas (parser, after); |
3971 | if (init.value != NULL_TREE | |
3972 | && TREE_CODE (init.value) != STRING_CST | |
3973 | && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR) | |
abc6c64f | 3974 | init = default_function_array_read_conversion (loc, init); |
f14c8207 | 3975 | } |
759791ee | 3976 | process_init_element (init, false, braced_init_obstack); |
1576dec7 | 3977 | } |
3978 | ||
3979 | /* Parse a compound statement (possibly a function body) (C90 6.6.2, | |
3980 | C99 6.8.2). | |
3981 | ||
3982 | compound-statement: | |
3983 | { block-item-list[opt] } | |
3984 | { label-declarations block-item-list } | |
3985 | ||
3986 | block-item-list: | |
3987 | block-item | |
3988 | block-item-list block-item | |
3989 | ||
3990 | block-item: | |
3991 | nested-declaration | |
3992 | statement | |
3993 | ||
3994 | nested-declaration: | |
3995 | declaration | |
3996 | ||
3997 | GNU extensions: | |
3998 | ||
3999 | compound-statement: | |
4000 | { label-declarations block-item-list } | |
4001 | ||
4002 | nested-declaration: | |
4003 | __extension__ nested-declaration | |
4004 | nested-function-definition | |
4005 | ||
4006 | label-declarations: | |
4007 | label-declaration | |
4008 | label-declarations label-declaration | |
4009 | ||
4010 | label-declaration: | |
4011 | __label__ identifier-list ; | |
4012 | ||
4013 | Allowing the mixing of declarations and code is new in C99. The | |
4014 | GNU syntax also permits (not shown above) labels at the end of | |
4015 | compound statements, which yield an error. We don't allow labels | |
4016 | on declarations; this might seem like a natural extension, but | |
4017 | there would be a conflict between attributes on the label and | |
4018 | prefix attributes on the declaration. ??? The syntax follows the | |
4019 | old parser in requiring something after label declarations. | |
4020 | Although they are erroneous if the labels declared aren't defined, | |
1e8e9920 | 4021 | is it useful for the syntax to be this way? |
48e1416a | 4022 | |
1e8e9920 | 4023 | OpenMP: |
48e1416a | 4024 | |
1e8e9920 | 4025 | block-item: |
4026 | openmp-directive | |
4027 | ||
4028 | openmp-directive: | |
4029 | barrier-directive | |
4030 | flush-directive */ | |
1576dec7 | 4031 | |
4032 | static tree | |
4033 | c_parser_compound_statement (c_parser *parser) | |
4034 | { | |
4035 | tree stmt; | |
e60a6f7b | 4036 | location_t brace_loc; |
4037 | brace_loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 4038 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
22d77a94 | 4039 | { |
4040 | /* Ensure a scope is entered and left anyway to avoid confusion | |
4041 | if we have just prepared to enter a function body. */ | |
4042 | stmt = c_begin_compound_stmt (true); | |
e60a6f7b | 4043 | c_end_compound_stmt (brace_loc, stmt, true); |
22d77a94 | 4044 | return error_mark_node; |
4045 | } | |
1576dec7 | 4046 | stmt = c_begin_compound_stmt (true); |
4047 | c_parser_compound_statement_nostart (parser); | |
e60a6f7b | 4048 | return c_end_compound_stmt (brace_loc, stmt, true); |
1576dec7 | 4049 | } |
4050 | ||
4051 | /* Parse a compound statement except for the opening brace. This is | |
4052 | used for parsing both compound statements and statement expressions | |
4053 | (which follow different paths to handling the opening). */ | |
4054 | ||
4055 | static void | |
4056 | c_parser_compound_statement_nostart (c_parser *parser) | |
4057 | { | |
4058 | bool last_stmt = false; | |
4059 | bool last_label = false; | |
3ae3a17f | 4060 | bool save_valid_for_pragma = valid_location_for_stdc_pragma_p (); |
e3b80d49 | 4061 | location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
1576dec7 | 4062 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) |
4063 | { | |
4064 | c_parser_consume_token (parser); | |
4065 | return; | |
4066 | } | |
3ae3a17f | 4067 | mark_valid_location_for_stdc_pragma (true); |
1576dec7 | 4068 | if (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
4069 | { | |
4070 | /* Read zero or more forward-declarations for labels that nested | |
4071 | functions can jump to. */ | |
3ae3a17f | 4072 | mark_valid_location_for_stdc_pragma (false); |
1576dec7 | 4073 | while (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
4074 | { | |
e60a6f7b | 4075 | label_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 4076 | c_parser_consume_token (parser); |
4077 | /* Any identifiers, including those declared as type names, | |
4078 | are OK here. */ | |
4079 | while (true) | |
4080 | { | |
4081 | tree label; | |
4082 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
4083 | { | |
4084 | c_parser_error (parser, "expected identifier"); | |
4085 | break; | |
4086 | } | |
4087 | label | |
4088 | = declare_label (c_parser_peek_token (parser)->value); | |
4089 | C_DECLARED_LABEL_FLAG (label) = 1; | |
e60a6f7b | 4090 | add_stmt (build_stmt (label_loc, DECL_EXPR, label)); |
1576dec7 | 4091 | c_parser_consume_token (parser); |
4092 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4093 | c_parser_consume_token (parser); | |
4094 | else | |
4095 | break; | |
4096 | } | |
4097 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4098 | } | |
e60a6f7b | 4099 | pedwarn (label_loc, OPT_pedantic, "ISO C forbids label declarations"); |
1576dec7 | 4100 | } |
4101 | /* We must now have at least one statement, label or declaration. */ | |
4102 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
4103 | { | |
3ae3a17f | 4104 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
1576dec7 | 4105 | c_parser_error (parser, "expected declaration or statement"); |
4106 | c_parser_consume_token (parser); | |
4107 | return; | |
4108 | } | |
4109 | while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
4110 | { | |
4111 | location_t loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 4112 | if (c_parser_next_token_is_keyword (parser, RID_CASE) |
4113 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4114 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4115 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4116 | { | |
be9eba16 | 4117 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) |
4118 | label_loc = c_parser_peek_2nd_token (parser)->location; | |
4119 | else | |
4120 | label_loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 4121 | last_label = true; |
4122 | last_stmt = false; | |
3ae3a17f | 4123 | mark_valid_location_for_stdc_pragma (false); |
1576dec7 | 4124 | c_parser_label (parser); |
4125 | } | |
4126 | else if (!last_label | |
71bb4bc6 | 4127 | && c_parser_next_tokens_start_declaration (parser)) |
1576dec7 | 4128 | { |
4129 | last_label = false; | |
3ae3a17f | 4130 | mark_valid_location_for_stdc_pragma (false); |
0a65c3bb | 4131 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL); |
8864917d | 4132 | if (last_stmt) |
48e1416a | 4133 | pedwarn_c90 (loc, |
21ca8540 | 4134 | (pedantic && !flag_isoc99) |
8864917d | 4135 | ? OPT_pedantic |
4136 | : OPT_Wdeclaration_after_statement, | |
21ca8540 | 4137 | "ISO C90 forbids mixed declarations and code"); |
1576dec7 | 4138 | last_stmt = false; |
4139 | } | |
4140 | else if (!last_label | |
4141 | && c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4142 | { | |
4143 | /* __extension__ can start a declaration, but is also an | |
4144 | unary operator that can start an expression. Consume all | |
4145 | but the last of a possible series of __extension__ to | |
4146 | determine which. */ | |
4147 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4148 | && (c_parser_peek_2nd_token (parser)->keyword | |
4149 | == RID_EXTENSION)) | |
4150 | c_parser_consume_token (parser); | |
f80e7755 | 4151 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
1576dec7 | 4152 | { |
4153 | int ext; | |
4154 | ext = disable_extension_diagnostics (); | |
4155 | c_parser_consume_token (parser); | |
4156 | last_label = false; | |
3ae3a17f | 4157 | mark_valid_location_for_stdc_pragma (false); |
f80e7755 | 4158 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
0a65c3bb | 4159 | true, NULL); |
1576dec7 | 4160 | /* Following the old parser, __extension__ does not |
4161 | disable this diagnostic. */ | |
4162 | restore_extension_diagnostics (ext); | |
8864917d | 4163 | if (last_stmt) |
21ca8540 | 4164 | pedwarn_c90 (loc, (pedantic && !flag_isoc99) |
8864917d | 4165 | ? OPT_pedantic |
4166 | : OPT_Wdeclaration_after_statement, | |
21ca8540 | 4167 | "ISO C90 forbids mixed declarations and code"); |
1576dec7 | 4168 | last_stmt = false; |
4169 | } | |
4170 | else | |
4171 | goto statement; | |
4172 | } | |
b75b98aa | 4173 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
4174 | { | |
4175 | /* External pragmas, and some omp pragmas, are not associated | |
4176 | with regular c code, and so are not to be considered statements | |
4177 | syntactically. This ensures that the user doesn't put them | |
4178 | places that would turn into syntax errors if the directive | |
4179 | were ignored. */ | |
4180 | if (c_parser_pragma (parser, pragma_compound)) | |
4181 | last_label = false, last_stmt = true; | |
4182 | } | |
4183 | else if (c_parser_next_token_is (parser, CPP_EOF)) | |
4184 | { | |
3ae3a17f | 4185 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
b75b98aa | 4186 | c_parser_error (parser, "expected declaration or statement"); |
4187 | return; | |
4188 | } | |
10c93a35 | 4189 | else if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4190 | { | |
48e1416a | 4191 | if (parser->in_if_block) |
10c93a35 | 4192 | { |
3ae3a17f | 4193 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
e3b80d49 | 4194 | error_at (loc, """expected %<}%> before %<else%>"); |
10c93a35 | 4195 | return; |
4196 | } | |
48e1416a | 4197 | else |
10c93a35 | 4198 | { |
e3b80d49 | 4199 | error_at (loc, "%<else%> without a previous %<if%>"); |
10c93a35 | 4200 | c_parser_consume_token (parser); |
4201 | continue; | |
4202 | } | |
4203 | } | |
1576dec7 | 4204 | else |
4205 | { | |
4206 | statement: | |
4207 | last_label = false; | |
4208 | last_stmt = true; | |
3ae3a17f | 4209 | mark_valid_location_for_stdc_pragma (false); |
1576dec7 | 4210 | c_parser_statement_after_labels (parser); |
4211 | } | |
d038ab63 | 4212 | |
4213 | parser->error = false; | |
1576dec7 | 4214 | } |
4215 | if (last_label) | |
e3b80d49 | 4216 | error_at (label_loc, "label at end of compound statement"); |
1576dec7 | 4217 | c_parser_consume_token (parser); |
3ae3a17f | 4218 | /* Restore the value we started with. */ |
4219 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); | |
1576dec7 | 4220 | } |
4221 | ||
4222 | /* Parse a label (C90 6.6.1, C99 6.8.1). | |
4223 | ||
4224 | label: | |
4225 | identifier : attributes[opt] | |
4226 | case constant-expression : | |
4227 | default : | |
4228 | ||
4229 | GNU extensions: | |
4230 | ||
4231 | label: | |
4232 | case constant-expression ... constant-expression : | |
4233 | ||
4234 | The use of attributes on labels is a GNU extension. The syntax in | |
4235 | GNU C accepts any expressions without commas, non-constant | |
4236 | expressions being rejected later. */ | |
4237 | ||
4238 | static void | |
4239 | c_parser_label (c_parser *parser) | |
4240 | { | |
4241 | location_t loc1 = c_parser_peek_token (parser)->location; | |
4242 | tree label = NULL_TREE; | |
4243 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) | |
4244 | { | |
4245 | tree exp1, exp2; | |
4246 | c_parser_consume_token (parser); | |
4247 | exp1 = c_parser_expr_no_commas (parser, NULL).value; | |
4248 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
4249 | { | |
4250 | c_parser_consume_token (parser); | |
e60a6f7b | 4251 | label = do_case (loc1, exp1, NULL_TREE); |
1576dec7 | 4252 | } |
4253 | else if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
4254 | { | |
4255 | c_parser_consume_token (parser); | |
4256 | exp2 = c_parser_expr_no_commas (parser, NULL).value; | |
4257 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
e60a6f7b | 4258 | label = do_case (loc1, exp1, exp2); |
1576dec7 | 4259 | } |
4260 | else | |
4261 | c_parser_error (parser, "expected %<:%> or %<...%>"); | |
4262 | } | |
4263 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
4264 | { | |
4265 | c_parser_consume_token (parser); | |
4266 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
e60a6f7b | 4267 | label = do_case (loc1, NULL_TREE, NULL_TREE); |
1576dec7 | 4268 | } |
4269 | else | |
4270 | { | |
4271 | tree name = c_parser_peek_token (parser)->value; | |
4272 | tree tlab; | |
1576dec7 | 4273 | tree attrs; |
be9eba16 | 4274 | location_t loc2 = c_parser_peek_token (parser)->location; |
1576dec7 | 4275 | gcc_assert (c_parser_next_token_is (parser, CPP_NAME)); |
4276 | c_parser_consume_token (parser); | |
4277 | gcc_assert (c_parser_next_token_is (parser, CPP_COLON)); | |
1576dec7 | 4278 | c_parser_consume_token (parser); |
4279 | attrs = c_parser_attributes (parser); | |
4280 | tlab = define_label (loc2, name); | |
4281 | if (tlab) | |
4282 | { | |
4283 | decl_attributes (&tlab, attrs, 0); | |
e60a6f7b | 4284 | label = add_stmt (build_stmt (loc1, LABEL_EXPR, tlab)); |
1576dec7 | 4285 | } |
4286 | } | |
4287 | if (label) | |
7561efef | 4288 | { |
71bb4bc6 | 4289 | if (c_parser_next_tokens_start_declaration (parser)) |
7561efef | 4290 | { |
e3b80d49 | 4291 | error_at (c_parser_peek_token (parser)->location, |
4292 | "a label can only be part of a statement and " | |
4293 | "a declaration is not a statement"); | |
48e1416a | 4294 | c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false, |
f80e7755 | 4295 | /*static_assert_ok*/ true, |
7561efef | 4296 | /*nested*/ true, /*empty_ok*/ false, |
0a65c3bb | 4297 | /*start_attr_ok*/ true, NULL); |
7561efef | 4298 | } |
4299 | } | |
1576dec7 | 4300 | } |
4301 | ||
4302 | /* Parse a statement (C90 6.6, C99 6.8). | |
4303 | ||
4304 | statement: | |
4305 | labeled-statement | |
4306 | compound-statement | |
4307 | expression-statement | |
4308 | selection-statement | |
4309 | iteration-statement | |
4310 | jump-statement | |
4311 | ||
4312 | labeled-statement: | |
4313 | label statement | |
4314 | ||
4315 | expression-statement: | |
4316 | expression[opt] ; | |
4317 | ||
4318 | selection-statement: | |
4319 | if-statement | |
4320 | switch-statement | |
4321 | ||
4322 | iteration-statement: | |
4323 | while-statement | |
4324 | do-statement | |
4325 | for-statement | |
4326 | ||
4327 | jump-statement: | |
4328 | goto identifier ; | |
4329 | continue ; | |
4330 | break ; | |
4331 | return expression[opt] ; | |
4332 | ||
4333 | GNU extensions: | |
4334 | ||
4335 | statement: | |
4336 | asm-statement | |
4337 | ||
4338 | jump-statement: | |
4339 | goto * expression ; | |
4340 | ||
4341 | Objective-C: | |
4342 | ||
4343 | statement: | |
4344 | objc-throw-statement | |
4345 | objc-try-catch-statement | |
4346 | objc-synchronized-statement | |
4347 | ||
4348 | objc-throw-statement: | |
4349 | @throw expression ; | |
4350 | @throw ; | |
1e8e9920 | 4351 | |
4352 | OpenMP: | |
4353 | ||
4354 | statement: | |
4355 | openmp-construct | |
4356 | ||
4357 | openmp-construct: | |
4358 | parallel-construct | |
4359 | for-construct | |
4360 | sections-construct | |
4361 | single-construct | |
4362 | parallel-for-construct | |
4363 | parallel-sections-construct | |
4364 | master-construct | |
4365 | critical-construct | |
4366 | atomic-construct | |
4367 | ordered-construct | |
4368 | ||
4369 | parallel-construct: | |
4370 | parallel-directive structured-block | |
4371 | ||
4372 | for-construct: | |
4373 | for-directive iteration-statement | |
4374 | ||
4375 | sections-construct: | |
4376 | sections-directive section-scope | |
4377 | ||
4378 | single-construct: | |
4379 | single-directive structured-block | |
4380 | ||
4381 | parallel-for-construct: | |
4382 | parallel-for-directive iteration-statement | |
4383 | ||
4384 | parallel-sections-construct: | |
4385 | parallel-sections-directive section-scope | |
4386 | ||
4387 | master-construct: | |
4388 | master-directive structured-block | |
4389 | ||
4390 | critical-construct: | |
4391 | critical-directive structured-block | |
4392 | ||
4393 | atomic-construct: | |
4394 | atomic-directive expression-statement | |
4395 | ||
4396 | ordered-construct: | |
4397 | ordered-directive structured-block */ | |
1576dec7 | 4398 | |
4399 | static void | |
4400 | c_parser_statement (c_parser *parser) | |
4401 | { | |
4402 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
4403 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4404 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4405 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4406 | c_parser_label (parser); | |
4407 | c_parser_statement_after_labels (parser); | |
4408 | } | |
4409 | ||
4410 | /* Parse a statement, other than a labeled statement. */ | |
4411 | ||
4412 | static void | |
4413 | c_parser_statement_after_labels (c_parser *parser) | |
4414 | { | |
4415 | location_t loc = c_parser_peek_token (parser)->location; | |
4416 | tree stmt = NULL_TREE; | |
10c93a35 | 4417 | bool in_if_block = parser->in_if_block; |
4418 | parser->in_if_block = false; | |
1576dec7 | 4419 | switch (c_parser_peek_token (parser)->type) |
4420 | { | |
4421 | case CPP_OPEN_BRACE: | |
4422 | add_stmt (c_parser_compound_statement (parser)); | |
4423 | break; | |
4424 | case CPP_KEYWORD: | |
4425 | switch (c_parser_peek_token (parser)->keyword) | |
4426 | { | |
4427 | case RID_IF: | |
4428 | c_parser_if_statement (parser); | |
4429 | break; | |
4430 | case RID_SWITCH: | |
4431 | c_parser_switch_statement (parser); | |
4432 | break; | |
4433 | case RID_WHILE: | |
4434 | c_parser_while_statement (parser); | |
4435 | break; | |
4436 | case RID_DO: | |
4437 | c_parser_do_statement (parser); | |
4438 | break; | |
4439 | case RID_FOR: | |
4440 | c_parser_for_statement (parser); | |
4441 | break; | |
4442 | case RID_GOTO: | |
4443 | c_parser_consume_token (parser); | |
4444 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4445 | { | |
e60a6f7b | 4446 | stmt = c_finish_goto_label (loc, |
4447 | c_parser_peek_token (parser)->value); | |
1576dec7 | 4448 | c_parser_consume_token (parser); |
4449 | } | |
4450 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
4451 | { | |
95f11b21 | 4452 | tree val; |
4453 | ||
1576dec7 | 4454 | c_parser_consume_token (parser); |
95f11b21 | 4455 | val = c_parser_expression (parser).value; |
4456 | mark_exp_read (val); | |
4457 | stmt = c_finish_goto_ptr (loc, val); | |
1576dec7 | 4458 | } |
4459 | else | |
4460 | c_parser_error (parser, "expected identifier or %<*%>"); | |
4461 | goto expect_semicolon; | |
4462 | case RID_CONTINUE: | |
4463 | c_parser_consume_token (parser); | |
e60a6f7b | 4464 | stmt = c_finish_bc_stmt (loc, &c_cont_label, false); |
1576dec7 | 4465 | goto expect_semicolon; |
4466 | case RID_BREAK: | |
4467 | c_parser_consume_token (parser); | |
e60a6f7b | 4468 | stmt = c_finish_bc_stmt (loc, &c_break_label, true); |
1576dec7 | 4469 | goto expect_semicolon; |
4470 | case RID_RETURN: | |
4471 | c_parser_consume_token (parser); | |
4472 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4473 | { | |
e60a6f7b | 4474 | stmt = c_finish_return (loc, NULL_TREE, NULL_TREE); |
1576dec7 | 4475 | c_parser_consume_token (parser); |
4476 | } | |
4477 | else | |
4478 | { | |
b9c74b4d | 4479 | struct c_expr expr = c_parser_expression_conv (parser); |
abc6c64f | 4480 | mark_exp_read (expr.value); |
e60a6f7b | 4481 | stmt = c_finish_return (loc, expr.value, expr.original_type); |
1576dec7 | 4482 | goto expect_semicolon; |
4483 | } | |
4484 | break; | |
4485 | case RID_ASM: | |
4486 | stmt = c_parser_asm_statement (parser); | |
4487 | break; | |
e5c75ac3 | 4488 | case RID_AT_THROW: |
1576dec7 | 4489 | gcc_assert (c_dialect_objc ()); |
4490 | c_parser_consume_token (parser); | |
4491 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4492 | { | |
e60a6f7b | 4493 | stmt = objc_build_throw_stmt (loc, NULL_TREE); |
1576dec7 | 4494 | c_parser_consume_token (parser); |
4495 | } | |
4496 | else | |
4497 | { | |
a75b1c71 | 4498 | tree expr = c_parser_expression (parser).value; |
4499 | expr = c_fully_fold (expr, false, NULL); | |
e60a6f7b | 4500 | stmt = objc_build_throw_stmt (loc, expr); |
1576dec7 | 4501 | goto expect_semicolon; |
4502 | } | |
4503 | break; | |
e5c75ac3 | 4504 | case RID_AT_TRY: |
1576dec7 | 4505 | gcc_assert (c_dialect_objc ()); |
b3d2d312 | 4506 | c_parser_objc_try_catch_finally_statement (parser); |
1576dec7 | 4507 | break; |
4508 | case RID_AT_SYNCHRONIZED: | |
4509 | gcc_assert (c_dialect_objc ()); | |
4510 | c_parser_objc_synchronized_statement (parser); | |
4511 | break; | |
4512 | default: | |
4513 | goto expr_stmt; | |
4514 | } | |
4515 | break; | |
4516 | case CPP_SEMICOLON: | |
4517 | c_parser_consume_token (parser); | |
4518 | break; | |
4519 | case CPP_CLOSE_PAREN: | |
4520 | case CPP_CLOSE_SQUARE: | |
4521 | /* Avoid infinite loop in error recovery: | |
4522 | c_parser_skip_until_found stops at a closing nesting | |
4523 | delimiter without consuming it, but here we need to consume | |
4524 | it to proceed further. */ | |
4525 | c_parser_error (parser, "expected statement"); | |
4526 | c_parser_consume_token (parser); | |
4527 | break; | |
b75b98aa | 4528 | case CPP_PRAGMA: |
4529 | c_parser_pragma (parser, pragma_stmt); | |
4530 | break; | |
1576dec7 | 4531 | default: |
4532 | expr_stmt: | |
e60a6f7b | 4533 | stmt = c_finish_expr_stmt (loc, c_parser_expression_conv (parser).value); |
1576dec7 | 4534 | expect_semicolon: |
4535 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4536 | break; | |
4537 | } | |
4538 | /* Two cases cannot and do not have line numbers associated: If stmt | |
4539 | is degenerate, such as "2;", then stmt is an INTEGER_CST, which | |
4540 | cannot hold line numbers. But that's OK because the statement | |
4541 | will either be changed to a MODIFY_EXPR during gimplification of | |
4542 | the statement expr, or discarded. If stmt was compound, but | |
4543 | without new variables, we will have skipped the creation of a | |
4544 | BIND and will have a bare STATEMENT_LIST. But that's OK because | |
4545 | (recursively) all of the component statements should already have | |
4546 | line numbers assigned. ??? Can we discard no-op statements | |
4547 | earlier? */ | |
e60a6f7b | 4548 | if (CAN_HAVE_LOCATION_P (stmt) |
4549 | && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION) | |
4550 | SET_EXPR_LOCATION (stmt, loc); | |
10c93a35 | 4551 | |
4552 | parser->in_if_block = in_if_block; | |
1576dec7 | 4553 | } |
4554 | ||
6513b50d | 4555 | /* Parse the condition from an if, do, while or for statements. */ |
4556 | ||
4557 | static tree | |
4558 | c_parser_condition (c_parser *parser) | |
4559 | { | |
e60a6f7b | 4560 | location_t loc = c_parser_peek_token (parser)->location; |
6513b50d | 4561 | tree cond; |
a75b1c71 | 4562 | cond = c_parser_expression_conv (parser).value; |
4563 | cond = c_objc_common_truthvalue_conversion (loc, cond); | |
4564 | cond = c_fully_fold (cond, false, NULL); | |
6513b50d | 4565 | if (warn_sequence_point) |
4566 | verify_sequence_points (cond); | |
4567 | return cond; | |
4568 | } | |
4569 | ||
1576dec7 | 4570 | /* Parse a parenthesized condition from an if, do or while statement. |
4571 | ||
4572 | condition: | |
4573 | ( expression ) | |
4574 | */ | |
4575 | static tree | |
4576 | c_parser_paren_condition (c_parser *parser) | |
4577 | { | |
1576dec7 | 4578 | tree cond; |
4579 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4580 | return error_mark_node; | |
6513b50d | 4581 | cond = c_parser_condition (parser); |
1576dec7 | 4582 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4583 | return cond; | |
4584 | } | |
4585 | ||
4586 | /* Parse a statement which is a block in C99. */ | |
4587 | ||
4588 | static tree | |
4589 | c_parser_c99_block_statement (c_parser *parser) | |
4590 | { | |
4591 | tree block = c_begin_compound_stmt (flag_isoc99); | |
e60a6f7b | 4592 | location_t loc = c_parser_peek_token (parser)->location; |
1576dec7 | 4593 | c_parser_statement (parser); |
e60a6f7b | 4594 | return c_end_compound_stmt (loc, block, flag_isoc99); |
1576dec7 | 4595 | } |
4596 | ||
10c93a35 | 4597 | /* Parse the body of an if statement. This is just parsing a |
4598 | statement but (a) it is a block in C99, (b) we track whether the | |
4599 | body is an if statement for the sake of -Wparentheses warnings, (c) | |
4600 | we handle an empty body specially for the sake of -Wempty-body | |
4601 | warnings, and (d) we call parser_compound_statement directly | |
4602 | because c_parser_statement_after_labels resets | |
4603 | parser->in_if_block. */ | |
1576dec7 | 4604 | |
4605 | static tree | |
4606 | c_parser_if_body (c_parser *parser, bool *if_p) | |
4607 | { | |
4608 | tree block = c_begin_compound_stmt (flag_isoc99); | |
e60a6f7b | 4609 | location_t body_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 4610 | while (c_parser_next_token_is_keyword (parser, RID_CASE) |
4611 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4612 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4613 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4614 | c_parser_label (parser); | |
4615 | *if_p = c_parser_next_token_is_keyword (parser, RID_IF); | |
ffe8fd56 | 4616 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
10c93a35 | 4617 | { |
c2c7830b | 4618 | location_t loc = c_parser_peek_token (parser)->location; |
e60a6f7b | 4619 | add_stmt (build_empty_stmt (loc)); |
10c93a35 | 4620 | c_parser_consume_token (parser); |
c2c7830b | 4621 | if (!c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4622 | warning_at (loc, OPT_Wempty_body, | |
4623 | "suggest braces around empty body in an %<if%> statement"); | |
10c93a35 | 4624 | } |
4625 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
4626 | add_stmt (c_parser_compound_statement (parser)); | |
4627 | else | |
4628 | c_parser_statement_after_labels (parser); | |
e60a6f7b | 4629 | return c_end_compound_stmt (body_loc, block, flag_isoc99); |
10c93a35 | 4630 | } |
4631 | ||
4632 | /* Parse the else body of an if statement. This is just parsing a | |
4633 | statement but (a) it is a block in C99, (b) we handle an empty body | |
4634 | specially for the sake of -Wempty-body warnings. */ | |
4635 | ||
4636 | static tree | |
4637 | c_parser_else_body (c_parser *parser) | |
4638 | { | |
e60a6f7b | 4639 | location_t else_loc = c_parser_peek_token (parser)->location; |
10c93a35 | 4640 | tree block = c_begin_compound_stmt (flag_isoc99); |
4641 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
4642 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4643 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4644 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4645 | c_parser_label (parser); | |
4646 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4647 | { | |
e60a6f7b | 4648 | location_t loc = c_parser_peek_token (parser)->location; |
4649 | warning_at (loc, | |
c2c7830b | 4650 | OPT_Wempty_body, |
4651 | "suggest braces around empty body in an %<else%> statement"); | |
e60a6f7b | 4652 | add_stmt (build_empty_stmt (loc)); |
10c93a35 | 4653 | c_parser_consume_token (parser); |
4654 | } | |
48e1416a | 4655 | else |
10c93a35 | 4656 | c_parser_statement_after_labels (parser); |
e60a6f7b | 4657 | return c_end_compound_stmt (else_loc, block, flag_isoc99); |
1576dec7 | 4658 | } |
4659 | ||
4660 | /* Parse an if statement (C90 6.6.4, C99 6.8.4). | |
4661 | ||
4662 | if-statement: | |
4663 | if ( expression ) statement | |
4664 | if ( expression ) statement else statement | |
4665 | */ | |
4666 | ||
4667 | static void | |
4668 | c_parser_if_statement (c_parser *parser) | |
4669 | { | |
4670 | tree block; | |
4671 | location_t loc; | |
4672 | tree cond; | |
10c93a35 | 4673 | bool first_if = false; |
1576dec7 | 4674 | tree first_body, second_body; |
10c93a35 | 4675 | bool in_if_block; |
4676 | ||
1576dec7 | 4677 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF)); |
4678 | c_parser_consume_token (parser); | |
4679 | block = c_begin_compound_stmt (flag_isoc99); | |
4680 | loc = c_parser_peek_token (parser)->location; | |
4681 | cond = c_parser_paren_condition (parser); | |
10c93a35 | 4682 | in_if_block = parser->in_if_block; |
4683 | parser->in_if_block = true; | |
1576dec7 | 4684 | first_body = c_parser_if_body (parser, &first_if); |
10c93a35 | 4685 | parser->in_if_block = in_if_block; |
1576dec7 | 4686 | if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4687 | { | |
4688 | c_parser_consume_token (parser); | |
10c93a35 | 4689 | second_body = c_parser_else_body (parser); |
1576dec7 | 4690 | } |
4691 | else | |
4692 | second_body = NULL_TREE; | |
4693 | c_finish_if_stmt (loc, cond, first_body, second_body, first_if); | |
e60a6f7b | 4694 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
1576dec7 | 4695 | } |
4696 | ||
4697 | /* Parse a switch statement (C90 6.6.4, C99 6.8.4). | |
4698 | ||
4699 | switch-statement: | |
4700 | switch (expression) statement | |
4701 | */ | |
4702 | ||
4703 | static void | |
4704 | c_parser_switch_statement (c_parser *parser) | |
4705 | { | |
4706 | tree block, expr, body, save_break; | |
e60a6f7b | 4707 | location_t switch_loc = c_parser_peek_token (parser)->location; |
4708 | location_t switch_cond_loc; | |
1576dec7 | 4709 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH)); |
4710 | c_parser_consume_token (parser); | |
4711 | block = c_begin_compound_stmt (flag_isoc99); | |
4712 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4713 | { | |
e60a6f7b | 4714 | switch_cond_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 4715 | expr = c_parser_expression (parser).value; |
4716 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4717 | } | |
4718 | else | |
e60a6f7b | 4719 | { |
4720 | switch_cond_loc = UNKNOWN_LOCATION; | |
4721 | expr = error_mark_node; | |
4722 | } | |
4723 | c_start_case (switch_loc, switch_cond_loc, expr); | |
1576dec7 | 4724 | save_break = c_break_label; |
4725 | c_break_label = NULL_TREE; | |
4726 | body = c_parser_c99_block_statement (parser); | |
4727 | c_finish_case (body); | |
4728 | if (c_break_label) | |
e60a6f7b | 4729 | { |
4730 | location_t here = c_parser_peek_token (parser)->location; | |
4731 | tree t = build1 (LABEL_EXPR, void_type_node, c_break_label); | |
4732 | SET_EXPR_LOCATION (t, here); | |
4733 | add_stmt (t); | |
4734 | } | |
1576dec7 | 4735 | c_break_label = save_break; |
e60a6f7b | 4736 | add_stmt (c_end_compound_stmt (switch_loc, block, flag_isoc99)); |
1576dec7 | 4737 | } |
4738 | ||
4739 | /* Parse a while statement (C90 6.6.5, C99 6.8.5). | |
4740 | ||
4741 | while-statement: | |
4742 | while (expression) statement | |
4743 | */ | |
4744 | ||
4745 | static void | |
4746 | c_parser_while_statement (c_parser *parser) | |
4747 | { | |
4748 | tree block, cond, body, save_break, save_cont; | |
4749 | location_t loc; | |
4750 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE)); | |
4751 | c_parser_consume_token (parser); | |
4752 | block = c_begin_compound_stmt (flag_isoc99); | |
4753 | loc = c_parser_peek_token (parser)->location; | |
4754 | cond = c_parser_paren_condition (parser); | |
4755 | save_break = c_break_label; | |
4756 | c_break_label = NULL_TREE; | |
4757 | save_cont = c_cont_label; | |
4758 | c_cont_label = NULL_TREE; | |
4759 | body = c_parser_c99_block_statement (parser); | |
4760 | c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true); | |
e60a6f7b | 4761 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
1576dec7 | 4762 | c_break_label = save_break; |
4763 | c_cont_label = save_cont; | |
4764 | } | |
4765 | ||
4766 | /* Parse a do statement (C90 6.6.5, C99 6.8.5). | |
4767 | ||
4768 | do-statement: | |
4769 | do statement while ( expression ) ; | |
4770 | */ | |
4771 | ||
4772 | static void | |
4773 | c_parser_do_statement (c_parser *parser) | |
4774 | { | |
4775 | tree block, cond, body, save_break, save_cont, new_break, new_cont; | |
4776 | location_t loc; | |
4777 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO)); | |
4778 | c_parser_consume_token (parser); | |
ffe8fd56 | 4779 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
e3b80d49 | 4780 | warning_at (c_parser_peek_token (parser)->location, |
4781 | OPT_Wempty_body, | |
4782 | "suggest braces around empty body in %<do%> statement"); | |
1576dec7 | 4783 | block = c_begin_compound_stmt (flag_isoc99); |
4784 | loc = c_parser_peek_token (parser)->location; | |
4785 | save_break = c_break_label; | |
4786 | c_break_label = NULL_TREE; | |
4787 | save_cont = c_cont_label; | |
4788 | c_cont_label = NULL_TREE; | |
4789 | body = c_parser_c99_block_statement (parser); | |
4790 | c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>"); | |
4791 | new_break = c_break_label; | |
4792 | c_break_label = save_break; | |
4793 | new_cont = c_cont_label; | |
4794 | c_cont_label = save_cont; | |
4795 | cond = c_parser_paren_condition (parser); | |
4796 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4797 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4798 | c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false); | |
e60a6f7b | 4799 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
1576dec7 | 4800 | } |
4801 | ||
4802 | /* Parse a for statement (C90 6.6.5, C99 6.8.5). | |
4803 | ||
4804 | for-statement: | |
4805 | for ( expression[opt] ; expression[opt] ; expression[opt] ) statement | |
4806 | for ( nested-declaration expression[opt] ; expression[opt] ) statement | |
4807 | ||
4808 | The form with a declaration is new in C99. | |
4809 | ||
4810 | ??? In accordance with the old parser, the declaration may be a | |
4811 | nested function, which is then rejected in check_for_loop_decls, | |
4812 | but does it make any sense for this to be included in the grammar? | |
4813 | Note in particular that the nested function does not include a | |
4814 | trailing ';', whereas the "declaration" production includes one. | |
4815 | Also, can we reject bad declarations earlier and cheaper than | |
0a65c3bb | 4816 | check_for_loop_decls? |
4817 | ||
4818 | In Objective-C, there are two additional variants: | |
4819 | ||
4820 | foreach-statement: | |
4821 | for ( expression in expresssion ) statement | |
4822 | for ( declaration in expression ) statement | |
4823 | ||
4824 | This is inconsistent with C, because the second variant is allowed | |
4825 | even if c99 is not enabled. | |
4826 | ||
4827 | The rest of the comment documents these Objective-C foreach-statement. | |
4828 | ||
4829 | Here is the canonical example of the first variant: | |
4830 | for (object in array) { do something with object } | |
4831 | we call the first expression ("object") the "object_expression" and | |
4832 | the second expression ("array") the "collection_expression". | |
4833 | object_expression must be an lvalue of type "id" (a generic Objective-C | |
4834 | object) because the loop works by assigning to object_expression the | |
4835 | various objects from the collection_expression. collection_expression | |
4836 | must evaluate to something of type "id" which responds to the method | |
4837 | countByEnumeratingWithState:objects:count:. | |
4838 | ||
4839 | The canonical example of the second variant is: | |
4840 | for (id object in array) { do something with object } | |
4841 | which is completely equivalent to | |
4842 | { | |
4843 | id object; | |
4844 | for (object in array) { do something with object } | |
4845 | } | |
4846 | Note that initizializing 'object' in some way (eg, "for ((object = | |
4847 | xxx) in array) { do something with object }") is possibly | |
4848 | technically valid, but completely pointless as 'object' will be | |
4849 | assigned to something else as soon as the loop starts. We should | |
4850 | most likely reject it (TODO). | |
4851 | ||
4852 | The beginning of the Objective-C foreach-statement looks exactly | |
4853 | like the beginning of the for-statement, and we can tell it is a | |
4854 | foreach-statement only because the initial declaration or | |
4855 | expression is terminated by 'in' instead of ';'. | |
4856 | */ | |
1576dec7 | 4857 | |
4858 | static void | |
4859 | c_parser_for_statement (c_parser *parser) | |
4860 | { | |
4861 | tree block, cond, incr, save_break, save_cont, body; | |
0a65c3bb | 4862 | /* The following are only used when parsing an ObjC foreach statement. */ |
65d95190 | 4863 | tree object_expression; |
4864 | /* Silence the bogus uninitialized warning. */ | |
4865 | tree collection_expression = NULL; | |
e60a6f7b | 4866 | location_t loc = c_parser_peek_token (parser)->location; |
4867 | location_t for_loc = c_parser_peek_token (parser)->location; | |
0a65c3bb | 4868 | bool is_foreach_statement = false; |
1576dec7 | 4869 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR)); |
4870 | c_parser_consume_token (parser); | |
0a65c3bb | 4871 | /* Open a compound statement in Objective-C as well, just in case this is |
4872 | as foreach expression. */ | |
4873 | block = c_begin_compound_stmt (flag_isoc99 || c_dialect_objc ()); | |
b54b6a4d | 4874 | cond = error_mark_node; |
4875 | incr = error_mark_node; | |
1576dec7 | 4876 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4877 | { | |
4878 | /* Parse the initialization declaration or expression. */ | |
0a65c3bb | 4879 | object_expression = error_mark_node; |
21e609c5 | 4880 | parser->objc_could_be_foreach_context = c_dialect_objc (); |
1576dec7 | 4881 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4882 | { | |
21e609c5 | 4883 | parser->objc_could_be_foreach_context = false; |
1576dec7 | 4884 | c_parser_consume_token (parser); |
e60a6f7b | 4885 | c_finish_expr_stmt (loc, NULL_TREE); |
1576dec7 | 4886 | } |
71bb4bc6 | 4887 | else if (c_parser_next_tokens_start_declaration (parser)) |
1576dec7 | 4888 | { |
0a65c3bb | 4889 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, |
4890 | &object_expression); | |
4891 | parser->objc_could_be_foreach_context = false; | |
4892 | ||
4893 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
4894 | { | |
4895 | c_parser_consume_token (parser); | |
4896 | is_foreach_statement = true; | |
4897 | if (check_for_loop_decls (for_loc, true) == NULL_TREE) | |
4898 | c_parser_error (parser, "multiple iterating variables in fast enumeration"); | |
4899 | } | |
4900 | else | |
4901 | check_for_loop_decls (for_loc, flag_isoc99); | |
1576dec7 | 4902 | } |
4903 | else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4904 | { | |
4905 | /* __extension__ can start a declaration, but is also an | |
4906 | unary operator that can start an expression. Consume all | |
4907 | but the last of a possible series of __extension__ to | |
4908 | determine which. */ | |
4909 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4910 | && (c_parser_peek_2nd_token (parser)->keyword | |
4911 | == RID_EXTENSION)) | |
4912 | c_parser_consume_token (parser); | |
f80e7755 | 4913 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
1576dec7 | 4914 | { |
4915 | int ext; | |
4916 | ext = disable_extension_diagnostics (); | |
4917 | c_parser_consume_token (parser); | |
f80e7755 | 4918 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
0a65c3bb | 4919 | true, &object_expression); |
4920 | parser->objc_could_be_foreach_context = false; | |
4921 | ||
1576dec7 | 4922 | restore_extension_diagnostics (ext); |
0a65c3bb | 4923 | if (c_parser_next_token_is_keyword (parser, RID_IN)) |
4924 | { | |
4925 | c_parser_consume_token (parser); | |
4926 | is_foreach_statement = true; | |
4927 | if (check_for_loop_decls (for_loc, true) == NULL_TREE) | |
4928 | c_parser_error (parser, "multiple iterating variables in fast enumeration"); | |
4929 | } | |
4930 | else | |
4931 | check_for_loop_decls (for_loc, flag_isoc99); | |
1576dec7 | 4932 | } |
4933 | else | |
4934 | goto init_expr; | |
4935 | } | |
4936 | else | |
4937 | { | |
4938 | init_expr: | |
0a65c3bb | 4939 | { |
4940 | tree init_expression; | |
0a65c3bb | 4941 | init_expression = c_parser_expression (parser).value; |
4942 | parser->objc_could_be_foreach_context = false; | |
4943 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
4944 | { | |
4945 | c_parser_consume_token (parser); | |
4946 | is_foreach_statement = true; | |
4947 | if (! lvalue_p (init_expression)) | |
4948 | c_parser_error (parser, "invalid iterating variable in fast enumeration"); | |
81976f54 | 4949 | object_expression = c_fully_fold (init_expression, false, NULL); |
0a65c3bb | 4950 | } |
4951 | else | |
4952 | { | |
4953 | c_finish_expr_stmt (loc, init_expression); | |
4954 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4955 | } | |
4956 | } | |
1576dec7 | 4957 | } |
0a65c3bb | 4958 | /* Parse the loop condition. In the case of a foreach |
4959 | statement, there is no loop condition. */ | |
21e609c5 | 4960 | gcc_assert (!parser->objc_could_be_foreach_context); |
0a65c3bb | 4961 | if (!is_foreach_statement) |
1576dec7 | 4962 | { |
0a65c3bb | 4963 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4964 | { | |
4965 | c_parser_consume_token (parser); | |
4966 | cond = NULL_TREE; | |
4967 | } | |
4968 | else | |
4969 | { | |
4970 | cond = c_parser_condition (parser); | |
4971 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4972 | } | |
1576dec7 | 4973 | } |
0a65c3bb | 4974 | /* Parse the increment expression (the third expression in a |
4975 | for-statement). In the case of a foreach-statement, this is | |
4976 | the expression that follows the 'in'. */ | |
4977 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
1576dec7 | 4978 | { |
0a65c3bb | 4979 | if (is_foreach_statement) |
4980 | { | |
4981 | c_parser_error (parser, "missing collection in fast enumeration"); | |
4982 | collection_expression = error_mark_node; | |
4983 | } | |
4984 | else | |
4985 | incr = c_process_expr_stmt (loc, NULL_TREE); | |
1576dec7 | 4986 | } |
1576dec7 | 4987 | else |
0a65c3bb | 4988 | { |
4989 | if (is_foreach_statement) | |
81976f54 | 4990 | collection_expression = c_fully_fold (c_parser_expression (parser).value, |
4991 | false, NULL); | |
0a65c3bb | 4992 | else |
4993 | incr = c_process_expr_stmt (loc, c_parser_expression (parser).value); | |
4994 | } | |
1576dec7 | 4995 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4996 | } | |
1576dec7 | 4997 | save_break = c_break_label; |
4998 | c_break_label = NULL_TREE; | |
4999 | save_cont = c_cont_label; | |
5000 | c_cont_label = NULL_TREE; | |
5001 | body = c_parser_c99_block_statement (parser); | |
0a65c3bb | 5002 | if (is_foreach_statement) |
5003 | objc_finish_foreach_loop (loc, object_expression, collection_expression, body, c_break_label, c_cont_label); | |
5004 | else | |
5005 | c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true); | |
5006 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99 || c_dialect_objc ())); | |
1576dec7 | 5007 | c_break_label = save_break; |
5008 | c_cont_label = save_cont; | |
5009 | } | |
5010 | ||
5011 | /* Parse an asm statement, a GNU extension. This is a full-blown asm | |
5012 | statement with inputs, outputs, clobbers, and volatile tag | |
5013 | allowed. | |
5014 | ||
5015 | asm-statement: | |
5016 | asm type-qualifier[opt] ( asm-argument ) ; | |
78f55ca8 | 5017 | asm type-qualifier[opt] goto ( asm-goto-argument ) ; |
1576dec7 | 5018 | |
5019 | asm-argument: | |
5020 | asm-string-literal | |
5021 | asm-string-literal : asm-operands[opt] | |
5022 | asm-string-literal : asm-operands[opt] : asm-operands[opt] | |
78f55ca8 | 5023 | asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt] |
5024 | ||
5025 | asm-goto-argument: | |
5026 | asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \ | |
5027 | : asm-goto-operands | |
1576dec7 | 5028 | |
5029 | Qualifiers other than volatile are accepted in the syntax but | |
5030 | warned for. */ | |
5031 | ||
5032 | static tree | |
5033 | c_parser_asm_statement (c_parser *parser) | |
5034 | { | |
78f55ca8 | 5035 | tree quals, str, outputs, inputs, clobbers, labels, ret; |
5036 | bool simple, is_goto; | |
e60a6f7b | 5037 | location_t asm_loc = c_parser_peek_token (parser)->location; |
78f55ca8 | 5038 | int section, nsections; |
5039 | ||
1576dec7 | 5040 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); |
5041 | c_parser_consume_token (parser); | |
5042 | if (c_parser_next_token_is_keyword (parser, RID_VOLATILE)) | |
5043 | { | |
5044 | quals = c_parser_peek_token (parser)->value; | |
5045 | c_parser_consume_token (parser); | |
5046 | } | |
5047 | else if (c_parser_next_token_is_keyword (parser, RID_CONST) | |
5048 | || c_parser_next_token_is_keyword (parser, RID_RESTRICT)) | |
5049 | { | |
e3b80d49 | 5050 | warning_at (c_parser_peek_token (parser)->location, |
5051 | 0, | |
5052 | "%E qualifier ignored on asm", | |
5053 | c_parser_peek_token (parser)->value); | |
1576dec7 | 5054 | quals = NULL_TREE; |
5055 | c_parser_consume_token (parser); | |
5056 | } | |
5057 | else | |
5058 | quals = NULL_TREE; | |
78f55ca8 | 5059 | |
5060 | is_goto = false; | |
5061 | if (c_parser_next_token_is_keyword (parser, RID_GOTO)) | |
5062 | { | |
5063 | c_parser_consume_token (parser); | |
5064 | is_goto = true; | |
5065 | } | |
5066 | ||
1576dec7 | 5067 | /* ??? Follow the C++ parser rather than using the |
8115b8be | 5068 | lex_untranslated_string kludge. */ |
5069 | parser->lex_untranslated_string = true; | |
78f55ca8 | 5070 | ret = NULL; |
5071 | ||
1576dec7 | 5072 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
78f55ca8 | 5073 | goto error; |
5074 | ||
1576dec7 | 5075 | str = c_parser_asm_string_literal (parser); |
0930c694 | 5076 | if (str == NULL_TREE) |
78f55ca8 | 5077 | goto error_close_paren; |
5078 | ||
5079 | simple = true; | |
5080 | outputs = NULL_TREE; | |
5081 | inputs = NULL_TREE; | |
5082 | clobbers = NULL_TREE; | |
5083 | labels = NULL_TREE; | |
5084 | ||
5085 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
5086 | goto done_asm; | |
5087 | ||
5088 | /* Parse each colon-delimited section of operands. */ | |
5089 | nsections = 3 + is_goto; | |
5090 | for (section = 0; section < nsections; ++section) | |
0930c694 | 5091 | { |
78f55ca8 | 5092 | if (!c_parser_require (parser, CPP_COLON, |
5093 | is_goto | |
5094 | ? "expected %<:%>" | |
5095 | : "expected %<:%> or %<)%>")) | |
5096 | goto error_close_paren; | |
5097 | ||
5098 | /* Once past any colon, we're no longer a simple asm. */ | |
5099 | simple = false; | |
5100 | ||
5101 | if ((!c_parser_next_token_is (parser, CPP_COLON) | |
5102 | && !c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
5103 | || section == 3) | |
5104 | switch (section) | |
5105 | { | |
5106 | case 0: | |
5107 | /* For asm goto, we don't allow output operands, but reserve | |
5108 | the slot for a future extension that does allow them. */ | |
5109 | if (!is_goto) | |
5110 | outputs = c_parser_asm_operands (parser, false); | |
5111 | break; | |
5112 | case 1: | |
5113 | inputs = c_parser_asm_operands (parser, true); | |
5114 | break; | |
5115 | case 2: | |
5116 | clobbers = c_parser_asm_clobbers (parser); | |
5117 | break; | |
5118 | case 3: | |
5119 | labels = c_parser_asm_goto_operands (parser); | |
5120 | break; | |
5121 | default: | |
5122 | gcc_unreachable (); | |
5123 | } | |
5124 | ||
5125 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
5126 | goto done_asm; | |
1576dec7 | 5127 | } |
78f55ca8 | 5128 | |
1576dec7 | 5129 | done_asm: |
1576dec7 | 5130 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
5131 | { | |
5132 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
78f55ca8 | 5133 | goto error; |
1576dec7 | 5134 | } |
78f55ca8 | 5135 | |
1576dec7 | 5136 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) |
5137 | c_parser_skip_to_end_of_block_or_statement (parser); | |
78f55ca8 | 5138 | |
e60a6f7b | 5139 | ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs, |
78f55ca8 | 5140 | clobbers, labels, simple)); |
5141 | ||
5142 | error: | |
5143 | parser->lex_untranslated_string = false; | |
1576dec7 | 5144 | return ret; |
78f55ca8 | 5145 | |
5146 | error_close_paren: | |
5147 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5148 | goto error; | |
1576dec7 | 5149 | } |
5150 | ||
f14c8207 | 5151 | /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but |
5152 | not outputs), apply the default conversion of functions and arrays | |
5153 | to pointers. | |
1576dec7 | 5154 | |
5155 | asm-operands: | |
5156 | asm-operand | |
5157 | asm-operands , asm-operand | |
5158 | ||
5159 | asm-operand: | |
5160 | asm-string-literal ( expression ) | |
5161 | [ identifier ] asm-string-literal ( expression ) | |
5162 | */ | |
5163 | ||
5164 | static tree | |
f14c8207 | 5165 | c_parser_asm_operands (c_parser *parser, bool convert_p) |
1576dec7 | 5166 | { |
5167 | tree list = NULL_TREE; | |
e60a6f7b | 5168 | location_t loc; |
1576dec7 | 5169 | while (true) |
5170 | { | |
e78cf9a7 | 5171 | tree name, str; |
5172 | struct c_expr expr; | |
1576dec7 | 5173 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) |
5174 | { | |
5175 | c_parser_consume_token (parser); | |
5176 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5177 | { | |
5178 | tree id = c_parser_peek_token (parser)->value; | |
5179 | c_parser_consume_token (parser); | |
5180 | name = build_string (IDENTIFIER_LENGTH (id), | |
5181 | IDENTIFIER_POINTER (id)); | |
5182 | } | |
5183 | else | |
5184 | { | |
5185 | c_parser_error (parser, "expected identifier"); | |
5186 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL); | |
5187 | return NULL_TREE; | |
5188 | } | |
5189 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5190 | "expected %<]%>"); | |
5191 | } | |
5192 | else | |
5193 | name = NULL_TREE; | |
5194 | str = c_parser_asm_string_literal (parser); | |
5195 | if (str == NULL_TREE) | |
5196 | return NULL_TREE; | |
8115b8be | 5197 | parser->lex_untranslated_string = false; |
1576dec7 | 5198 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
5199 | { | |
8115b8be | 5200 | parser->lex_untranslated_string = true; |
1576dec7 | 5201 | return NULL_TREE; |
5202 | } | |
e60a6f7b | 5203 | loc = c_parser_peek_token (parser)->location; |
e78cf9a7 | 5204 | expr = c_parser_expression (parser); |
abc6c64f | 5205 | mark_exp_read (expr.value); |
f14c8207 | 5206 | if (convert_p) |
e60a6f7b | 5207 | expr = default_function_array_conversion (loc, expr); |
a75b1c71 | 5208 | expr.value = c_fully_fold (expr.value, false, NULL); |
8115b8be | 5209 | parser->lex_untranslated_string = true; |
1576dec7 | 5210 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
5211 | { | |
5212 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5213 | return NULL_TREE; | |
5214 | } | |
5215 | list = chainon (list, build_tree_list (build_tree_list (name, str), | |
e78cf9a7 | 5216 | expr.value)); |
1576dec7 | 5217 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
5218 | c_parser_consume_token (parser); | |
5219 | else | |
5220 | break; | |
5221 | } | |
5222 | return list; | |
5223 | } | |
5224 | ||
5225 | /* Parse asm clobbers, a GNU extension. | |
5226 | ||
5227 | asm-clobbers: | |
5228 | asm-string-literal | |
5229 | asm-clobbers , asm-string-literal | |
5230 | */ | |
5231 | ||
5232 | static tree | |
5233 | c_parser_asm_clobbers (c_parser *parser) | |
5234 | { | |
5235 | tree list = NULL_TREE; | |
5236 | while (true) | |
5237 | { | |
5238 | tree str = c_parser_asm_string_literal (parser); | |
5239 | if (str) | |
5240 | list = tree_cons (NULL_TREE, str, list); | |
5241 | else | |
5242 | return NULL_TREE; | |
5243 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5244 | c_parser_consume_token (parser); | |
5245 | else | |
5246 | break; | |
5247 | } | |
5248 | return list; | |
5249 | } | |
5250 | ||
78f55ca8 | 5251 | /* Parse asm goto labels, a GNU extension. |
48e1416a | 5252 | |
78f55ca8 | 5253 | asm-goto-operands: |
5254 | identifier | |
5255 | asm-goto-operands , identifier | |
5256 | */ | |
5257 | ||
5258 | static tree | |
5259 | c_parser_asm_goto_operands (c_parser *parser) | |
5260 | { | |
5261 | tree list = NULL_TREE; | |
5262 | while (true) | |
5263 | { | |
5264 | tree name, label; | |
5265 | ||
5266 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5267 | { | |
5268 | c_token *tok = c_parser_peek_token (parser); | |
5269 | name = tok->value; | |
5270 | label = lookup_label_for_goto (tok->location, name); | |
5271 | c_parser_consume_token (parser); | |
5272 | TREE_USED (label) = 1; | |
5273 | } | |
5274 | else | |
5275 | { | |
5276 | c_parser_error (parser, "expected identifier"); | |
5277 | return NULL_TREE; | |
5278 | } | |
5279 | ||
5280 | name = build_string (IDENTIFIER_LENGTH (name), | |
5281 | IDENTIFIER_POINTER (name)); | |
5282 | list = tree_cons (name, label, list); | |
5283 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5284 | c_parser_consume_token (parser); | |
5285 | else | |
5286 | return nreverse (list); | |
5287 | } | |
5288 | } | |
5289 | ||
1576dec7 | 5290 | /* Parse an expression other than a compound expression; that is, an |
5291 | assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not | |
5292 | NULL then it is an Objective-C message expression which is the | |
5293 | primary-expression starting the expression as an initializer. | |
5294 | ||
5295 | assignment-expression: | |
5296 | conditional-expression | |
5297 | unary-expression assignment-operator assignment-expression | |
5298 | ||
5299 | assignment-operator: one of | |
5300 | = *= /= %= += -= <<= >>= &= ^= |= | |
5301 | ||
5302 | In GNU C we accept any conditional expression on the LHS and | |
5303 | diagnose the invalid lvalue rather than producing a syntax | |
5304 | error. */ | |
5305 | ||
5306 | static struct c_expr | |
5307 | c_parser_expr_no_commas (c_parser *parser, struct c_expr *after) | |
5308 | { | |
5309 | struct c_expr lhs, rhs, ret; | |
5310 | enum tree_code code; | |
e60a6f7b | 5311 | location_t op_location, exp_location; |
1576dec7 | 5312 | gcc_assert (!after || c_dialect_objc ()); |
5313 | lhs = c_parser_conditional_expression (parser, after); | |
b6889cb0 | 5314 | op_location = c_parser_peek_token (parser)->location; |
1576dec7 | 5315 | switch (c_parser_peek_token (parser)->type) |
5316 | { | |
5317 | case CPP_EQ: | |
5318 | code = NOP_EXPR; | |
5319 | break; | |
5320 | case CPP_MULT_EQ: | |
5321 | code = MULT_EXPR; | |
5322 | break; | |
5323 | case CPP_DIV_EQ: | |
5324 | code = TRUNC_DIV_EXPR; | |
5325 | break; | |
5326 | case CPP_MOD_EQ: | |
5327 | code = TRUNC_MOD_EXPR; | |
5328 | break; | |
5329 | case CPP_PLUS_EQ: | |
5330 | code = PLUS_EXPR; | |
5331 | break; | |
5332 | case CPP_MINUS_EQ: | |
5333 | code = MINUS_EXPR; | |
5334 | break; | |
5335 | case CPP_LSHIFT_EQ: | |
5336 | code = LSHIFT_EXPR; | |
5337 | break; | |
5338 | case CPP_RSHIFT_EQ: | |
5339 | code = RSHIFT_EXPR; | |
5340 | break; | |
5341 | case CPP_AND_EQ: | |
5342 | code = BIT_AND_EXPR; | |
5343 | break; | |
5344 | case CPP_XOR_EQ: | |
5345 | code = BIT_XOR_EXPR; | |
5346 | break; | |
5347 | case CPP_OR_EQ: | |
5348 | code = BIT_IOR_EXPR; | |
5349 | break; | |
5350 | default: | |
5351 | return lhs; | |
5352 | } | |
5353 | c_parser_consume_token (parser); | |
e60a6f7b | 5354 | exp_location = c_parser_peek_token (parser)->location; |
1576dec7 | 5355 | rhs = c_parser_expr_no_commas (parser, NULL); |
abc6c64f | 5356 | rhs = default_function_array_read_conversion (exp_location, rhs); |
8458f4ca | 5357 | ret.value = build_modify_expr (op_location, lhs.value, lhs.original_type, |
e60a6f7b | 5358 | code, exp_location, rhs.value, |
5359 | rhs.original_type); | |
1576dec7 | 5360 | if (code == NOP_EXPR) |
5361 | ret.original_code = MODIFY_EXPR; | |
5362 | else | |
5363 | { | |
5364 | TREE_NO_WARNING (ret.value) = 1; | |
5365 | ret.original_code = ERROR_MARK; | |
5366 | } | |
841fdaa6 | 5367 | ret.original_type = NULL; |
1576dec7 | 5368 | return ret; |
5369 | } | |
5370 | ||
5371 | /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER | |
5372 | is not NULL then it is an Objective-C message expression which is | |
5373 | the primary-expression starting the expression as an initializer. | |
5374 | ||
5375 | conditional-expression: | |
5376 | logical-OR-expression | |
5377 | logical-OR-expression ? expression : conditional-expression | |
5378 | ||
5379 | GNU extensions: | |
5380 | ||
5381 | conditional-expression: | |
5382 | logical-OR-expression ? : conditional-expression | |
5383 | */ | |
5384 | ||
5385 | static struct c_expr | |
5386 | c_parser_conditional_expression (c_parser *parser, struct c_expr *after) | |
5387 | { | |
5388 | struct c_expr cond, exp1, exp2, ret; | |
b9bdfa0b | 5389 | location_t cond_loc, colon_loc, middle_loc; |
8e70fb09 | 5390 | |
1576dec7 | 5391 | gcc_assert (!after || c_dialect_objc ()); |
8e70fb09 | 5392 | |
2169f33b | 5393 | cond = c_parser_binary_expression (parser, after, PREC_NONE); |
8e70fb09 | 5394 | |
1576dec7 | 5395 | if (c_parser_next_token_is_not (parser, CPP_QUERY)) |
5396 | return cond; | |
e60a6f7b | 5397 | cond_loc = c_parser_peek_token (parser)->location; |
abc6c64f | 5398 | cond = default_function_array_read_conversion (cond_loc, cond); |
1576dec7 | 5399 | c_parser_consume_token (parser); |
5400 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
5401 | { | |
c6418a4e | 5402 | tree eptype = NULL_TREE; |
b9bdfa0b | 5403 | |
5404 | middle_loc = c_parser_peek_token (parser)->location; | |
5405 | pedwarn (middle_loc, OPT_pedantic, | |
21ca8540 | 5406 | "ISO C forbids omitting the middle term of a ?: expression"); |
b9bdfa0b | 5407 | warn_for_omitted_condop (middle_loc, cond.value); |
c6418a4e | 5408 | if (TREE_CODE (cond.value) == EXCESS_PRECISION_EXPR) |
5409 | { | |
5410 | eptype = TREE_TYPE (cond.value); | |
5411 | cond.value = TREE_OPERAND (cond.value, 0); | |
5412 | } | |
1576dec7 | 5413 | /* Make sure first operand is calculated only once. */ |
a75b1c71 | 5414 | exp1.value = c_save_expr (default_conversion (cond.value)); |
c6418a4e | 5415 | if (eptype) |
5416 | exp1.value = build1 (EXCESS_PRECISION_EXPR, eptype, exp1.value); | |
841fdaa6 | 5417 | exp1.original_type = NULL; |
8e70fb09 | 5418 | cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value); |
48d94ede | 5419 | c_inhibit_evaluation_warnings += cond.value == truthvalue_true_node; |
1576dec7 | 5420 | } |
5421 | else | |
5422 | { | |
5423 | cond.value | |
45a78cc0 | 5424 | = c_objc_common_truthvalue_conversion |
8e70fb09 | 5425 | (cond_loc, default_conversion (cond.value)); |
48d94ede | 5426 | c_inhibit_evaluation_warnings += cond.value == truthvalue_false_node; |
f14c8207 | 5427 | exp1 = c_parser_expression_conv (parser); |
abc6c64f | 5428 | mark_exp_read (exp1.value); |
48d94ede | 5429 | c_inhibit_evaluation_warnings += |
5430 | ((cond.value == truthvalue_true_node) | |
5431 | - (cond.value == truthvalue_false_node)); | |
1576dec7 | 5432 | } |
d5b637fa | 5433 | |
5434 | colon_loc = c_parser_peek_token (parser)->location; | |
1576dec7 | 5435 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
5436 | { | |
48d94ede | 5437 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
1576dec7 | 5438 | ret.value = error_mark_node; |
5439 | ret.original_code = ERROR_MARK; | |
841fdaa6 | 5440 | ret.original_type = NULL; |
1576dec7 | 5441 | return ret; |
5442 | } | |
e60a6f7b | 5443 | { |
5444 | location_t exp2_loc = c_parser_peek_token (parser)->location; | |
5445 | exp2 = c_parser_conditional_expression (parser, NULL); | |
abc6c64f | 5446 | exp2 = default_function_array_read_conversion (exp2_loc, exp2); |
e60a6f7b | 5447 | } |
48d94ede | 5448 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
d5b637fa | 5449 | ret.value = build_conditional_expr (colon_loc, cond.value, |
a75b1c71 | 5450 | cond.original_code == C_MAYBE_CONST_EXPR, |
6163a125 | 5451 | exp1.value, exp1.original_type, |
5452 | exp2.value, exp2.original_type); | |
1576dec7 | 5453 | ret.original_code = ERROR_MARK; |
841fdaa6 | 5454 | if (exp1.value == error_mark_node || exp2.value == error_mark_node) |
5455 | ret.original_type = NULL; | |
5456 | else | |
5457 | { | |
5458 | tree t1, t2; | |
5459 | ||
5460 | /* If both sides are enum type, the default conversion will have | |
5461 | made the type of the result be an integer type. We want to | |
5462 | remember the enum types we started with. */ | |
5463 | t1 = exp1.original_type ? exp1.original_type : TREE_TYPE (exp1.value); | |
5464 | t2 = exp2.original_type ? exp2.original_type : TREE_TYPE (exp2.value); | |
5465 | ret.original_type = ((t1 != error_mark_node | |
5466 | && t2 != error_mark_node | |
5467 | && (TYPE_MAIN_VARIANT (t1) | |
5468 | == TYPE_MAIN_VARIANT (t2))) | |
5469 | ? t1 | |
5470 | : NULL); | |
5471 | } | |
1576dec7 | 5472 | return ret; |
5473 | } | |
5474 | ||
5475 | /* Parse a binary expression; that is, a logical-OR-expression (C90 | |
5476 | 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is | |
5477 | an Objective-C message expression which is the primary-expression | |
2169f33b | 5478 | starting the expression as an initializer. PREC is the starting |
5479 | precedence, usually PREC_NONE. | |
1576dec7 | 5480 | |
5481 | multiplicative-expression: | |
5482 | cast-expression | |
5483 | multiplicative-expression * cast-expression | |
5484 | multiplicative-expression / cast-expression | |
5485 | multiplicative-expression % cast-expression | |
5486 | ||
5487 | additive-expression: | |
5488 | multiplicative-expression | |
5489 | additive-expression + multiplicative-expression | |
5490 | additive-expression - multiplicative-expression | |
5491 | ||
5492 | shift-expression: | |
5493 | additive-expression | |
5494 | shift-expression << additive-expression | |
5495 | shift-expression >> additive-expression | |
5496 | ||
5497 | relational-expression: | |
5498 | shift-expression | |
5499 | relational-expression < shift-expression | |
5500 | relational-expression > shift-expression | |
5501 | relational-expression <= shift-expression | |
5502 | relational-expression >= shift-expression | |
5503 | ||
5504 | equality-expression: | |
5505 | relational-expression | |
5506 | equality-expression == relational-expression | |
5507 | equality-expression != relational-expression | |
5508 | ||
5509 | AND-expression: | |
5510 | equality-expression | |
5511 | AND-expression & equality-expression | |
5512 | ||
5513 | exclusive-OR-expression: | |
5514 | AND-expression | |
5515 | exclusive-OR-expression ^ AND-expression | |
5516 | ||
5517 | inclusive-OR-expression: | |
5518 | exclusive-OR-expression | |
5519 | inclusive-OR-expression | exclusive-OR-expression | |
5520 | ||
5521 | logical-AND-expression: | |
5522 | inclusive-OR-expression | |
5523 | logical-AND-expression && inclusive-OR-expression | |
5524 | ||
5525 | logical-OR-expression: | |
5526 | logical-AND-expression | |
5527 | logical-OR-expression || logical-AND-expression | |
5528 | */ | |
5529 | ||
5530 | static struct c_expr | |
2169f33b | 5531 | c_parser_binary_expression (c_parser *parser, struct c_expr *after, |
5532 | enum c_parser_prec prec) | |
1576dec7 | 5533 | { |
5534 | /* A binary expression is parsed using operator-precedence parsing, | |
5535 | with the operands being cast expressions. All the binary | |
5536 | operators are left-associative. Thus a binary expression is of | |
5537 | form: | |
5538 | ||
5539 | E0 op1 E1 op2 E2 ... | |
5540 | ||
5541 | which we represent on a stack. On the stack, the precedence | |
5542 | levels are strictly increasing. When a new operator is | |
5543 | encountered of higher precedence than that at the top of the | |
5544 | stack, it is pushed; its LHS is the top expression, and its RHS | |
5545 | is everything parsed until it is popped. When a new operator is | |
5546 | encountered with precedence less than or equal to that at the top | |
5547 | of the stack, triples E[i-1] op[i] E[i] are popped and replaced | |
5548 | by the result of the operation until the operator at the top of | |
5549 | the stack has lower precedence than the new operator or there is | |
5550 | only one element on the stack; then the top expression is the LHS | |
5551 | of the new operator. In the case of logical AND and OR | |
48d94ede | 5552 | expressions, we also need to adjust c_inhibit_evaluation_warnings |
5553 | as appropriate when the operators are pushed and popped. */ | |
1576dec7 | 5554 | |
1576dec7 | 5555 | struct { |
5556 | /* The expression at this stack level. */ | |
5557 | struct c_expr expr; | |
5558 | /* The precedence of the operator on its left, PREC_NONE at the | |
5559 | bottom of the stack. */ | |
2169f33b | 5560 | enum c_parser_prec prec; |
1576dec7 | 5561 | /* The operation on its left. */ |
5562 | enum tree_code op; | |
43158006 | 5563 | /* The source location of this operation. */ |
5564 | location_t loc; | |
1576dec7 | 5565 | } stack[NUM_PRECS]; |
5566 | int sp; | |
8e70fb09 | 5567 | /* Location of the binary operator. */ |
0eaffeb7 | 5568 | location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
1576dec7 | 5569 | #define POP \ |
5570 | do { \ | |
5571 | switch (stack[sp].op) \ | |
5572 | { \ | |
5573 | case TRUTH_ANDIF_EXPR: \ | |
48d94ede | 5574 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
5575 | == truthvalue_false_node); \ | |
1576dec7 | 5576 | break; \ |
5577 | case TRUTH_ORIF_EXPR: \ | |
48d94ede | 5578 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
5579 | == truthvalue_true_node); \ | |
1576dec7 | 5580 | break; \ |
5581 | default: \ | |
5582 | break; \ | |
5583 | } \ | |
e78cf9a7 | 5584 | stack[sp - 1].expr \ |
abc6c64f | 5585 | = default_function_array_read_conversion (stack[sp - 1].loc, \ |
5586 | stack[sp - 1].expr); \ | |
e78cf9a7 | 5587 | stack[sp].expr \ |
abc6c64f | 5588 | = default_function_array_read_conversion (stack[sp].loc, \ |
5589 | stack[sp].expr); \ | |
43158006 | 5590 | stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \ |
8e70fb09 | 5591 | stack[sp].op, \ |
1576dec7 | 5592 | stack[sp - 1].expr, \ |
5593 | stack[sp].expr); \ | |
5594 | sp--; \ | |
5595 | } while (0) | |
5596 | gcc_assert (!after || c_dialect_objc ()); | |
43158006 | 5597 | stack[0].loc = c_parser_peek_token (parser)->location; |
1576dec7 | 5598 | stack[0].expr = c_parser_cast_expression (parser, after); |
2169f33b | 5599 | stack[0].prec = prec; |
1576dec7 | 5600 | sp = 0; |
5601 | while (true) | |
5602 | { | |
2169f33b | 5603 | enum c_parser_prec oprec; |
1576dec7 | 5604 | enum tree_code ocode; |
5605 | if (parser->error) | |
5606 | goto out; | |
5607 | switch (c_parser_peek_token (parser)->type) | |
5608 | { | |
5609 | case CPP_MULT: | |
5610 | oprec = PREC_MULT; | |
5611 | ocode = MULT_EXPR; | |
5612 | break; | |
5613 | case CPP_DIV: | |
5614 | oprec = PREC_MULT; | |
5615 | ocode = TRUNC_DIV_EXPR; | |
5616 | break; | |
5617 | case CPP_MOD: | |
5618 | oprec = PREC_MULT; | |
5619 | ocode = TRUNC_MOD_EXPR; | |
5620 | break; | |
5621 | case CPP_PLUS: | |
5622 | oprec = PREC_ADD; | |
5623 | ocode = PLUS_EXPR; | |
5624 | break; | |
5625 | case CPP_MINUS: | |
5626 | oprec = PREC_ADD; | |
5627 | ocode = MINUS_EXPR; | |
5628 | break; | |
5629 | case CPP_LSHIFT: | |
5630 | oprec = PREC_SHIFT; | |
5631 | ocode = LSHIFT_EXPR; | |
5632 | break; | |
5633 | case CPP_RSHIFT: | |
5634 | oprec = PREC_SHIFT; | |
5635 | ocode = RSHIFT_EXPR; | |
5636 | break; | |
5637 | case CPP_LESS: | |
5638 | oprec = PREC_REL; | |
5639 | ocode = LT_EXPR; | |
5640 | break; | |
5641 | case CPP_GREATER: | |
5642 | oprec = PREC_REL; | |
5643 | ocode = GT_EXPR; | |
5644 | break; | |
5645 | case CPP_LESS_EQ: | |
5646 | oprec = PREC_REL; | |
5647 | ocode = LE_EXPR; | |
5648 | break; | |
5649 | case CPP_GREATER_EQ: | |
5650 | oprec = PREC_REL; | |
5651 | ocode = GE_EXPR; | |
5652 | break; | |
5653 | case CPP_EQ_EQ: | |
5654 | oprec = PREC_EQ; | |
5655 | ocode = EQ_EXPR; | |
5656 | break; | |
5657 | case CPP_NOT_EQ: | |
5658 | oprec = PREC_EQ; | |
5659 | ocode = NE_EXPR; | |
5660 | break; | |
5661 | case CPP_AND: | |
5662 | oprec = PREC_BITAND; | |
5663 | ocode = BIT_AND_EXPR; | |
5664 | break; | |
5665 | case CPP_XOR: | |
5666 | oprec = PREC_BITXOR; | |
5667 | ocode = BIT_XOR_EXPR; | |
5668 | break; | |
5669 | case CPP_OR: | |
5670 | oprec = PREC_BITOR; | |
5671 | ocode = BIT_IOR_EXPR; | |
5672 | break; | |
5673 | case CPP_AND_AND: | |
5674 | oprec = PREC_LOGAND; | |
5675 | ocode = TRUTH_ANDIF_EXPR; | |
5676 | break; | |
5677 | case CPP_OR_OR: | |
5678 | oprec = PREC_LOGOR; | |
5679 | ocode = TRUTH_ORIF_EXPR; | |
5680 | break; | |
5681 | default: | |
5682 | /* Not a binary operator, so end of the binary | |
5683 | expression. */ | |
5684 | goto out; | |
5685 | } | |
8e70fb09 | 5686 | binary_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 5687 | while (oprec <= stack[sp].prec) |
2169f33b | 5688 | { |
5689 | if (sp == 0) | |
5690 | goto out; | |
5691 | POP; | |
5692 | } | |
5693 | c_parser_consume_token (parser); | |
1576dec7 | 5694 | switch (ocode) |
5695 | { | |
5696 | case TRUTH_ANDIF_EXPR: | |
e78cf9a7 | 5697 | stack[sp].expr |
abc6c64f | 5698 | = default_function_array_read_conversion (stack[sp].loc, |
5699 | stack[sp].expr); | |
45a78cc0 | 5700 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
43158006 | 5701 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
48d94ede | 5702 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5703 | == truthvalue_false_node); | |
1576dec7 | 5704 | break; |
5705 | case TRUTH_ORIF_EXPR: | |
e78cf9a7 | 5706 | stack[sp].expr |
abc6c64f | 5707 | = default_function_array_read_conversion (stack[sp].loc, |
5708 | stack[sp].expr); | |
45a78cc0 | 5709 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
43158006 | 5710 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
48d94ede | 5711 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5712 | == truthvalue_true_node); | |
1576dec7 | 5713 | break; |
5714 | default: | |
5715 | break; | |
5716 | } | |
5717 | sp++; | |
43158006 | 5718 | stack[sp].loc = binary_loc; |
1576dec7 | 5719 | stack[sp].expr = c_parser_cast_expression (parser, NULL); |
5720 | stack[sp].prec = oprec; | |
5721 | stack[sp].op = ocode; | |
e60a6f7b | 5722 | stack[sp].loc = binary_loc; |
1576dec7 | 5723 | } |
5724 | out: | |
5725 | while (sp > 0) | |
5726 | POP; | |
5727 | return stack[0].expr; | |
5728 | #undef POP | |
5729 | } | |
5730 | ||
5731 | /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not | |
5732 | NULL then it is an Objective-C message expression which is the | |
5733 | primary-expression starting the expression as an initializer. | |
5734 | ||
5735 | cast-expression: | |
5736 | unary-expression | |
5737 | ( type-name ) unary-expression | |
5738 | */ | |
5739 | ||
5740 | static struct c_expr | |
5741 | c_parser_cast_expression (c_parser *parser, struct c_expr *after) | |
5742 | { | |
e60a6f7b | 5743 | location_t cast_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 5744 | gcc_assert (!after || c_dialect_objc ()); |
5745 | if (after) | |
e60a6f7b | 5746 | return c_parser_postfix_expression_after_primary (parser, |
5747 | cast_loc, *after); | |
1576dec7 | 5748 | /* If the expression begins with a parenthesized type name, it may |
5749 | be either a cast or a compound literal; we need to see whether | |
5750 | the next character is '{' to tell the difference. If not, it is | |
26ee9e7a | 5751 | an unary expression. Full detection of unknown typenames here |
5752 | would require a 3-token lookahead. */ | |
1576dec7 | 5753 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) |
5754 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5755 | { | |
5756 | struct c_type_name *type_name; | |
5757 | struct c_expr ret; | |
e78cf9a7 | 5758 | struct c_expr expr; |
1576dec7 | 5759 | c_parser_consume_token (parser); |
5760 | type_name = c_parser_type_name (parser); | |
5761 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5762 | if (type_name == NULL) | |
5763 | { | |
5764 | ret.value = error_mark_node; | |
5765 | ret.original_code = ERROR_MARK; | |
841fdaa6 | 5766 | ret.original_type = NULL; |
1576dec7 | 5767 | return ret; |
5768 | } | |
f6e59711 | 5769 | |
5770 | /* Save casted types in the function's used types hash table. */ | |
35df6eb4 | 5771 | used_types_insert (type_name->specs->type); |
f6e59711 | 5772 | |
1576dec7 | 5773 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
0b09525f | 5774 | return c_parser_postfix_expression_after_paren_type (parser, type_name, |
e60a6f7b | 5775 | cast_loc); |
5776 | { | |
5777 | location_t expr_loc = c_parser_peek_token (parser)->location; | |
5778 | expr = c_parser_cast_expression (parser, NULL); | |
abc6c64f | 5779 | expr = default_function_array_read_conversion (expr_loc, expr); |
e60a6f7b | 5780 | } |
5781 | ret.value = c_cast_expr (cast_loc, type_name, expr.value); | |
1576dec7 | 5782 | ret.original_code = ERROR_MARK; |
841fdaa6 | 5783 | ret.original_type = NULL; |
1576dec7 | 5784 | return ret; |
5785 | } | |
5786 | else | |
5787 | return c_parser_unary_expression (parser); | |
5788 | } | |
5789 | ||
5790 | /* Parse an unary expression (C90 6.3.3, C99 6.5.3). | |
5791 | ||
5792 | unary-expression: | |
5793 | postfix-expression | |
5794 | ++ unary-expression | |
5795 | -- unary-expression | |
5796 | unary-operator cast-expression | |
5797 | sizeof unary-expression | |
5798 | sizeof ( type-name ) | |
5799 | ||
5800 | unary-operator: one of | |
5801 | & * + - ~ ! | |
5802 | ||
5803 | GNU extensions: | |
5804 | ||
5805 | unary-expression: | |
5806 | __alignof__ unary-expression | |
5807 | __alignof__ ( type-name ) | |
5808 | && identifier | |
5809 | ||
83e25171 | 5810 | (C1X permits _Alignof with type names only.) |
5811 | ||
1576dec7 | 5812 | unary-operator: one of |
5813 | __extension__ __real__ __imag__ | |
5814 | ||
5815 | In addition, the GNU syntax treats ++ and -- as unary operators, so | |
5816 | they may be applied to cast expressions with errors for non-lvalues | |
5817 | given later. */ | |
5818 | ||
5819 | static struct c_expr | |
5820 | c_parser_unary_expression (c_parser *parser) | |
5821 | { | |
5822 | int ext; | |
f14c8207 | 5823 | struct c_expr ret, op; |
e60a6f7b | 5824 | location_t op_loc = c_parser_peek_token (parser)->location; |
5825 | location_t exp_loc; | |
841fdaa6 | 5826 | ret.original_code = ERROR_MARK; |
5827 | ret.original_type = NULL; | |
1576dec7 | 5828 | switch (c_parser_peek_token (parser)->type) |
5829 | { | |
5830 | case CPP_PLUS_PLUS: | |
5831 | c_parser_consume_token (parser); | |
e60a6f7b | 5832 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5833 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5834 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5835 | return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op); |
1576dec7 | 5836 | case CPP_MINUS_MINUS: |
5837 | c_parser_consume_token (parser); | |
e60a6f7b | 5838 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5839 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5840 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5841 | return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op); |
1576dec7 | 5842 | case CPP_AND: |
5843 | c_parser_consume_token (parser); | |
abc6c64f | 5844 | op = c_parser_cast_expression (parser, NULL); |
5845 | mark_exp_read (op.value); | |
5846 | return parser_build_unary_op (op_loc, ADDR_EXPR, op); | |
1576dec7 | 5847 | case CPP_MULT: |
5848 | c_parser_consume_token (parser); | |
e60a6f7b | 5849 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5850 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5851 | op = default_function_array_read_conversion (exp_loc, op); |
f08923b3 | 5852 | ret.value = build_indirect_ref (op_loc, op.value, RO_UNARY_STAR); |
1576dec7 | 5853 | return ret; |
5854 | case CPP_PLUS: | |
8b6866af | 5855 | if (!c_dialect_objc () && !in_system_header) |
e60a6f7b | 5856 | warning_at (op_loc, |
e3b80d49 | 5857 | OPT_Wtraditional, |
5858 | "traditional C rejects the unary plus operator"); | |
be9eba16 | 5859 | c_parser_consume_token (parser); |
e60a6f7b | 5860 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5861 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5862 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5863 | return parser_build_unary_op (op_loc, CONVERT_EXPR, op); |
1576dec7 | 5864 | case CPP_MINUS: |
5865 | c_parser_consume_token (parser); | |
e60a6f7b | 5866 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5867 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5868 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5869 | return parser_build_unary_op (op_loc, NEGATE_EXPR, op); |
1576dec7 | 5870 | case CPP_COMPL: |
5871 | c_parser_consume_token (parser); | |
e60a6f7b | 5872 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5873 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5874 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5875 | return parser_build_unary_op (op_loc, BIT_NOT_EXPR, op); |
1576dec7 | 5876 | case CPP_NOT: |
5877 | c_parser_consume_token (parser); | |
e60a6f7b | 5878 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5879 | op = c_parser_cast_expression (parser, NULL); |
abc6c64f | 5880 | op = default_function_array_read_conversion (exp_loc, op); |
e60a6f7b | 5881 | return parser_build_unary_op (op_loc, TRUTH_NOT_EXPR, op); |
1576dec7 | 5882 | case CPP_AND_AND: |
5883 | /* Refer to the address of a label as a pointer. */ | |
5884 | c_parser_consume_token (parser); | |
5885 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5886 | { | |
5887 | ret.value = finish_label_address_expr | |
e60a6f7b | 5888 | (c_parser_peek_token (parser)->value, op_loc); |
1576dec7 | 5889 | c_parser_consume_token (parser); |
1576dec7 | 5890 | } |
5891 | else | |
5892 | { | |
5893 | c_parser_error (parser, "expected identifier"); | |
5894 | ret.value = error_mark_node; | |
1576dec7 | 5895 | } |
5381eb98 | 5896 | return ret; |
1576dec7 | 5897 | case CPP_KEYWORD: |
5898 | switch (c_parser_peek_token (parser)->keyword) | |
5899 | { | |
5900 | case RID_SIZEOF: | |
5901 | return c_parser_sizeof_expression (parser); | |
5902 | case RID_ALIGNOF: | |
5903 | return c_parser_alignof_expression (parser); | |
5904 | case RID_EXTENSION: | |
5905 | c_parser_consume_token (parser); | |
5906 | ext = disable_extension_diagnostics (); | |
5907 | ret = c_parser_cast_expression (parser, NULL); | |
5908 | restore_extension_diagnostics (ext); | |
5909 | return ret; | |
5910 | case RID_REALPART: | |
5911 | c_parser_consume_token (parser); | |
e60a6f7b | 5912 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5913 | op = c_parser_cast_expression (parser, NULL); |
e60a6f7b | 5914 | op = default_function_array_conversion (exp_loc, op); |
5915 | return parser_build_unary_op (op_loc, REALPART_EXPR, op); | |
1576dec7 | 5916 | case RID_IMAGPART: |
5917 | c_parser_consume_token (parser); | |
e60a6f7b | 5918 | exp_loc = c_parser_peek_token (parser)->location; |
f14c8207 | 5919 | op = c_parser_cast_expression (parser, NULL); |
e60a6f7b | 5920 | op = default_function_array_conversion (exp_loc, op); |
5921 | return parser_build_unary_op (op_loc, IMAGPART_EXPR, op); | |
1576dec7 | 5922 | default: |
5923 | return c_parser_postfix_expression (parser); | |
5924 | } | |
5925 | default: | |
5926 | return c_parser_postfix_expression (parser); | |
5927 | } | |
5928 | } | |
5929 | ||
5930 | /* Parse a sizeof expression. */ | |
5931 | ||
5932 | static struct c_expr | |
5933 | c_parser_sizeof_expression (c_parser *parser) | |
5934 | { | |
5935 | struct c_expr expr; | |
be9eba16 | 5936 | location_t expr_loc; |
1576dec7 | 5937 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF)); |
5938 | c_parser_consume_token (parser); | |
48d94ede | 5939 | c_inhibit_evaluation_warnings++; |
1576dec7 | 5940 | in_sizeof++; |
5941 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5942 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5943 | { | |
5944 | /* Either sizeof ( type-name ) or sizeof unary-expression | |
5945 | starting with a compound literal. */ | |
5946 | struct c_type_name *type_name; | |
5947 | c_parser_consume_token (parser); | |
be9eba16 | 5948 | expr_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 5949 | type_name = c_parser_type_name (parser); |
5950 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5951 | if (type_name == NULL) | |
5952 | { | |
5953 | struct c_expr ret; | |
48d94ede | 5954 | c_inhibit_evaluation_warnings--; |
1576dec7 | 5955 | in_sizeof--; |
5956 | ret.value = error_mark_node; | |
5957 | ret.original_code = ERROR_MARK; | |
841fdaa6 | 5958 | ret.original_type = NULL; |
1576dec7 | 5959 | return ret; |
5960 | } | |
5961 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
5962 | { | |
5963 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
0b09525f | 5964 | type_name, |
5965 | expr_loc); | |
1576dec7 | 5966 | goto sizeof_expr; |
5967 | } | |
5968 | /* sizeof ( type-name ). */ | |
48d94ede | 5969 | c_inhibit_evaluation_warnings--; |
1576dec7 | 5970 | in_sizeof--; |
e60a6f7b | 5971 | return c_expr_sizeof_type (expr_loc, type_name); |
1576dec7 | 5972 | } |
5973 | else | |
5974 | { | |
be9eba16 | 5975 | expr_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 5976 | expr = c_parser_unary_expression (parser); |
5977 | sizeof_expr: | |
48d94ede | 5978 | c_inhibit_evaluation_warnings--; |
1576dec7 | 5979 | in_sizeof--; |
abc6c64f | 5980 | mark_exp_read (expr.value); |
1576dec7 | 5981 | if (TREE_CODE (expr.value) == COMPONENT_REF |
5982 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
e3b80d49 | 5983 | error_at (expr_loc, "%<sizeof%> applied to a bit-field"); |
e60a6f7b | 5984 | return c_expr_sizeof_expr (expr_loc, expr); |
1576dec7 | 5985 | } |
5986 | } | |
5987 | ||
5988 | /* Parse an alignof expression. */ | |
5989 | ||
5990 | static struct c_expr | |
5991 | c_parser_alignof_expression (c_parser *parser) | |
5992 | { | |
5993 | struct c_expr expr; | |
e60a6f7b | 5994 | location_t loc = c_parser_peek_token (parser)->location; |
83e25171 | 5995 | tree alignof_spelling = c_parser_peek_token (parser)->value; |
1576dec7 | 5996 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF)); |
83e25171 | 5997 | /* A diagnostic is not required for the use of this identifier in |
5998 | the implementation namespace; only diagnose it for the C1X | |
5999 | spelling because of existing code using the other spellings. */ | |
6000 | if (!flag_isoc1x | |
6001 | && strcmp (IDENTIFIER_POINTER (alignof_spelling), "_Alignof") == 0) | |
6002 | { | |
6003 | if (flag_isoc99) | |
6004 | pedwarn (loc, OPT_pedantic, "ISO C99 does not support %qE", | |
6005 | alignof_spelling); | |
6006 | else | |
6007 | pedwarn (loc, OPT_pedantic, "ISO C90 does not support %qE", | |
6008 | alignof_spelling); | |
6009 | } | |
1576dec7 | 6010 | c_parser_consume_token (parser); |
48d94ede | 6011 | c_inhibit_evaluation_warnings++; |
1576dec7 | 6012 | in_alignof++; |
6013 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
6014 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
6015 | { | |
6016 | /* Either __alignof__ ( type-name ) or __alignof__ | |
6017 | unary-expression starting with a compound literal. */ | |
0b09525f | 6018 | location_t loc; |
1576dec7 | 6019 | struct c_type_name *type_name; |
6020 | struct c_expr ret; | |
6021 | c_parser_consume_token (parser); | |
0b09525f | 6022 | loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6023 | type_name = c_parser_type_name (parser); |
6024 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6025 | if (type_name == NULL) | |
6026 | { | |
6027 | struct c_expr ret; | |
48d94ede | 6028 | c_inhibit_evaluation_warnings--; |
1576dec7 | 6029 | in_alignof--; |
6030 | ret.value = error_mark_node; | |
6031 | ret.original_code = ERROR_MARK; | |
841fdaa6 | 6032 | ret.original_type = NULL; |
1576dec7 | 6033 | return ret; |
6034 | } | |
6035 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
6036 | { | |
6037 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
0b09525f | 6038 | type_name, |
6039 | loc); | |
1576dec7 | 6040 | goto alignof_expr; |
6041 | } | |
6042 | /* alignof ( type-name ). */ | |
48d94ede | 6043 | c_inhibit_evaluation_warnings--; |
1576dec7 | 6044 | in_alignof--; |
e60a6f7b | 6045 | ret.value = c_alignof (loc, groktypename (type_name, NULL, NULL)); |
1576dec7 | 6046 | ret.original_code = ERROR_MARK; |
841fdaa6 | 6047 | ret.original_type = NULL; |
1576dec7 | 6048 | return ret; |
6049 | } | |
6050 | else | |
6051 | { | |
6052 | struct c_expr ret; | |
6053 | expr = c_parser_unary_expression (parser); | |
6054 | alignof_expr: | |
abc6c64f | 6055 | mark_exp_read (expr.value); |
48d94ede | 6056 | c_inhibit_evaluation_warnings--; |
1576dec7 | 6057 | in_alignof--; |
83e25171 | 6058 | pedwarn (loc, OPT_pedantic, "ISO C does not allow %<%E (expression)%>", |
6059 | alignof_spelling); | |
e60a6f7b | 6060 | ret.value = c_alignof_expr (loc, expr.value); |
1576dec7 | 6061 | ret.original_code = ERROR_MARK; |
841fdaa6 | 6062 | ret.original_type = NULL; |
1576dec7 | 6063 | return ret; |
6064 | } | |
6065 | } | |
6066 | ||
6cf89e04 | 6067 | /* Helper function to read arguments of builtins which are interfaces |
f4803722 | 6068 | for the middle-end nodes like COMPLEX_EXPR, VEC_PERM_EXPR and |
6cf89e04 | 6069 | others. The name of the builtin is passed using BNAME parameter. |
6070 | Function returns true if there were no errors while parsing and | |
a11dda8e | 6071 | stores the arguments in CEXPR_LIST. */ |
6cf89e04 | 6072 | static bool |
6073 | c_parser_get_builtin_args (c_parser *parser, const char *bname, | |
a11dda8e | 6074 | VEC(c_expr_t,gc) **ret_cexpr_list) |
6cf89e04 | 6075 | { |
6076 | location_t loc = c_parser_peek_token (parser)->location; | |
a11dda8e | 6077 | VEC (c_expr_t,gc) *cexpr_list; |
6078 | c_expr_t expr; | |
6cf89e04 | 6079 | |
a11dda8e | 6080 | *ret_cexpr_list = NULL; |
6cf89e04 | 6081 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) |
6082 | { | |
6083 | error_at (loc, "cannot take address of %qs", bname); | |
6084 | return false; | |
6085 | } | |
6086 | ||
6087 | c_parser_consume_token (parser); | |
6088 | ||
6089 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
6090 | { | |
6091 | c_parser_consume_token (parser); | |
6092 | return true; | |
6093 | } | |
a11dda8e | 6094 | |
6095 | expr = c_parser_expr_no_commas (parser, NULL); | |
6096 | cexpr_list = VEC_alloc (c_expr_t, gc, 1); | |
6097 | C_EXPR_APPEND (cexpr_list, expr); | |
6098 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
6099 | { | |
6100 | c_parser_consume_token (parser); | |
6101 | expr = c_parser_expr_no_commas (parser, NULL); | |
6102 | C_EXPR_APPEND (cexpr_list, expr); | |
6103 | } | |
6cf89e04 | 6104 | |
6105 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) | |
6106 | return false; | |
6107 | ||
a11dda8e | 6108 | *ret_cexpr_list = cexpr_list; |
6cf89e04 | 6109 | return true; |
6110 | } | |
6111 | ||
6112 | ||
1576dec7 | 6113 | /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2). |
6114 | ||
6115 | postfix-expression: | |
6116 | primary-expression | |
6117 | postfix-expression [ expression ] | |
6118 | postfix-expression ( argument-expression-list[opt] ) | |
6119 | postfix-expression . identifier | |
6120 | postfix-expression -> identifier | |
6121 | postfix-expression ++ | |
6122 | postfix-expression -- | |
6123 | ( type-name ) { initializer-list } | |
6124 | ( type-name ) { initializer-list , } | |
6125 | ||
6126 | argument-expression-list: | |
6127 | argument-expression | |
6128 | argument-expression-list , argument-expression | |
6129 | ||
6130 | primary-expression: | |
6131 | identifier | |
6132 | constant | |
6133 | string-literal | |
6134 | ( expression ) | |
6135 | ||
6136 | GNU extensions: | |
6137 | ||
6138 | primary-expression: | |
6139 | __func__ | |
6140 | (treated as a keyword in GNU C) | |
6141 | __FUNCTION__ | |
6142 | __PRETTY_FUNCTION__ | |
6143 | ( compound-statement ) | |
6144 | __builtin_va_arg ( assignment-expression , type-name ) | |
6145 | __builtin_offsetof ( type-name , offsetof-member-designator ) | |
6146 | __builtin_choose_expr ( assignment-expression , | |
6147 | assignment-expression , | |
6148 | assignment-expression ) | |
6149 | __builtin_types_compatible_p ( type-name , type-name ) | |
bff4ad11 | 6150 | __builtin_complex ( assignment-expression , assignment-expression ) |
6cf89e04 | 6151 | __builtin_shuffle ( assignment-expression , assignment-expression ) |
6152 | __builtin_shuffle ( assignment-expression , | |
6153 | assignment-expression , | |
6154 | assignment-expression, ) | |
1576dec7 | 6155 | |
6156 | offsetof-member-designator: | |
6157 | identifier | |
6158 | offsetof-member-designator . identifier | |
6159 | offsetof-member-designator [ expression ] | |
6160 | ||
6161 | Objective-C: | |
6162 | ||
6163 | primary-expression: | |
6164 | [ objc-receiver objc-message-args ] | |
6165 | @selector ( objc-selector-arg ) | |
6166 | @protocol ( identifier ) | |
6167 | @encode ( type-name ) | |
6168 | objc-string-literal | |
b0d0931f | 6169 | Classname . identifier |
1576dec7 | 6170 | */ |
6171 | ||
6172 | static struct c_expr | |
6173 | c_parser_postfix_expression (c_parser *parser) | |
6174 | { | |
6cf89e04 | 6175 | struct c_expr expr, e1; |
1576dec7 | 6176 | struct c_type_name *t1, *t2; |
e60a6f7b | 6177 | location_t loc = c_parser_peek_token (parser)->location;; |
841fdaa6 | 6178 | expr.original_code = ERROR_MARK; |
6179 | expr.original_type = NULL; | |
1576dec7 | 6180 | switch (c_parser_peek_token (parser)->type) |
6181 | { | |
6182 | case CPP_NUMBER: | |
14e882ea | 6183 | expr.value = c_parser_peek_token (parser)->value; |
14e882ea | 6184 | loc = c_parser_peek_token (parser)->location; |
6185 | c_parser_consume_token (parser); | |
6186 | if (TREE_CODE (expr.value) == FIXED_CST | |
6187 | && !targetm.fixed_point_supported_p ()) | |
6188 | { | |
6189 | error_at (loc, "fixed-point types not supported for this target"); | |
6190 | expr.value = error_mark_node; | |
6191 | } | |
6192 | break; | |
1576dec7 | 6193 | case CPP_CHAR: |
924bbf02 | 6194 | case CPP_CHAR16: |
6195 | case CPP_CHAR32: | |
1576dec7 | 6196 | case CPP_WCHAR: |
6197 | expr.value = c_parser_peek_token (parser)->value; | |
1576dec7 | 6198 | c_parser_consume_token (parser); |
6199 | break; | |
6200 | case CPP_STRING: | |
924bbf02 | 6201 | case CPP_STRING16: |
6202 | case CPP_STRING32: | |
1576dec7 | 6203 | case CPP_WSTRING: |
538ba11a | 6204 | case CPP_UTF8STRING: |
1576dec7 | 6205 | expr.value = c_parser_peek_token (parser)->value; |
6206 | expr.original_code = STRING_CST; | |
6207 | c_parser_consume_token (parser); | |
6208 | break; | |
6209 | case CPP_OBJC_STRING: | |
6210 | gcc_assert (c_dialect_objc ()); | |
6211 | expr.value | |
6212 | = objc_build_string_object (c_parser_peek_token (parser)->value); | |
1576dec7 | 6213 | c_parser_consume_token (parser); |
6214 | break; | |
6215 | case CPP_NAME: | |
b0d0931f | 6216 | switch (c_parser_peek_token (parser)->id_kind) |
1576dec7 | 6217 | { |
b0d0931f | 6218 | case C_ID_ID: |
6219 | { | |
6220 | tree id = c_parser_peek_token (parser)->value; | |
6221 | c_parser_consume_token (parser); | |
6222 | expr.value = build_external_ref (loc, id, | |
6223 | (c_parser_peek_token (parser)->type | |
6224 | == CPP_OPEN_PAREN), | |
6225 | &expr.original_type); | |
6226 | break; | |
6227 | } | |
6228 | case C_ID_CLASSNAME: | |
6229 | { | |
6230 | /* Here we parse the Objective-C 2.0 Class.name dot | |
6231 | syntax. */ | |
6232 | tree class_name = c_parser_peek_token (parser)->value; | |
6233 | tree component; | |
6234 | c_parser_consume_token (parser); | |
6235 | gcc_assert (c_dialect_objc ()); | |
6236 | if (!c_parser_require (parser, CPP_DOT, "expected %<.%>")) | |
6237 | { | |
6238 | expr.value = error_mark_node; | |
6239 | break; | |
6240 | } | |
6241 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6242 | { | |
6243 | c_parser_error (parser, "expected identifier"); | |
6244 | expr.value = error_mark_node; | |
6245 | break; | |
6246 | } | |
6247 | component = c_parser_peek_token (parser)->value; | |
6248 | c_parser_consume_token (parser); | |
6249 | expr.value = objc_build_class_component_ref (class_name, | |
6250 | component); | |
6251 | break; | |
6252 | } | |
6253 | default: | |
1576dec7 | 6254 | c_parser_error (parser, "expected expression"); |
6255 | expr.value = error_mark_node; | |
1576dec7 | 6256 | break; |
6257 | } | |
1576dec7 | 6258 | break; |
6259 | case CPP_OPEN_PAREN: | |
6260 | /* A parenthesized expression, statement expression or compound | |
6261 | literal. */ | |
6262 | if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE) | |
6263 | { | |
6264 | /* A statement expression. */ | |
6265 | tree stmt; | |
e60a6f7b | 6266 | location_t brace_loc; |
1576dec7 | 6267 | c_parser_consume_token (parser); |
e60a6f7b | 6268 | brace_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6269 | c_parser_consume_token (parser); |
cacfdc02 | 6270 | if (!building_stmt_list_p ()) |
1576dec7 | 6271 | { |
e60a6f7b | 6272 | error_at (loc, "braced-group within expression allowed " |
e3b80d49 | 6273 | "only inside a function"); |
1576dec7 | 6274 | parser->error = true; |
6275 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
6276 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6277 | expr.value = error_mark_node; | |
1576dec7 | 6278 | break; |
6279 | } | |
6280 | stmt = c_begin_stmt_expr (); | |
6281 | c_parser_compound_statement_nostart (parser); | |
6282 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6283 | "expected %<)%>"); | |
48e1416a | 6284 | pedwarn (loc, OPT_pedantic, |
21ca8540 | 6285 | "ISO C forbids braced-groups within expressions"); |
e60a6f7b | 6286 | expr.value = c_finish_stmt_expr (brace_loc, stmt); |
062966c1 | 6287 | mark_exp_read (expr.value); |
1576dec7 | 6288 | } |
6289 | else if (c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
6290 | { | |
6291 | /* A compound literal. ??? Can we actually get here rather | |
6292 | than going directly to | |
6293 | c_parser_postfix_expression_after_paren_type from | |
6294 | elsewhere? */ | |
0b09525f | 6295 | location_t loc; |
1576dec7 | 6296 | struct c_type_name *type_name; |
6297 | c_parser_consume_token (parser); | |
0b09525f | 6298 | loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6299 | type_name = c_parser_type_name (parser); |
6300 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6301 | "expected %<)%>"); | |
6302 | if (type_name == NULL) | |
6303 | { | |
6304 | expr.value = error_mark_node; | |
1576dec7 | 6305 | } |
6306 | else | |
6307 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
0b09525f | 6308 | type_name, |
6309 | loc); | |
1576dec7 | 6310 | } |
6311 | else | |
6312 | { | |
6313 | /* A parenthesized expression. */ | |
6314 | c_parser_consume_token (parser); | |
6315 | expr = c_parser_expression (parser); | |
6316 | if (TREE_CODE (expr.value) == MODIFY_EXPR) | |
6317 | TREE_NO_WARNING (expr.value) = 1; | |
a75b1c71 | 6318 | if (expr.original_code != C_MAYBE_CONST_EXPR) |
6319 | expr.original_code = ERROR_MARK; | |
841fdaa6 | 6320 | /* Don't change EXPR.ORIGINAL_TYPE. */ |
1576dec7 | 6321 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
6322 | "expected %<)%>"); | |
6323 | } | |
6324 | break; | |
6325 | case CPP_KEYWORD: | |
6326 | switch (c_parser_peek_token (parser)->keyword) | |
6327 | { | |
6328 | case RID_FUNCTION_NAME: | |
6329 | case RID_PRETTY_FUNCTION_NAME: | |
6330 | case RID_C99_FUNCTION_NAME: | |
e60a6f7b | 6331 | expr.value = fname_decl (loc, |
e3b80d49 | 6332 | c_parser_peek_token (parser)->keyword, |
1576dec7 | 6333 | c_parser_peek_token (parser)->value); |
1576dec7 | 6334 | c_parser_consume_token (parser); |
6335 | break; | |
6336 | case RID_VA_ARG: | |
6337 | c_parser_consume_token (parser); | |
6338 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6339 | { | |
6340 | expr.value = error_mark_node; | |
1576dec7 | 6341 | break; |
6342 | } | |
6343 | e1 = c_parser_expr_no_commas (parser, NULL); | |
abc6c64f | 6344 | mark_exp_read (e1.value); |
a75b1c71 | 6345 | e1.value = c_fully_fold (e1.value, false, NULL); |
1576dec7 | 6346 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
6347 | { | |
6348 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6349 | expr.value = error_mark_node; | |
1576dec7 | 6350 | break; |
6351 | } | |
d62e827b | 6352 | loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6353 | t1 = c_parser_type_name (parser); |
6354 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6355 | "expected %<)%>"); | |
6356 | if (t1 == NULL) | |
6357 | { | |
6358 | expr.value = error_mark_node; | |
1576dec7 | 6359 | } |
6360 | else | |
6361 | { | |
a75b1c71 | 6362 | tree type_expr = NULL_TREE; |
e60a6f7b | 6363 | expr.value = c_build_va_arg (loc, e1.value, |
6364 | groktypename (t1, &type_expr, NULL)); | |
a75b1c71 | 6365 | if (type_expr) |
6366 | { | |
6367 | expr.value = build2 (C_MAYBE_CONST_EXPR, | |
6368 | TREE_TYPE (expr.value), type_expr, | |
6369 | expr.value); | |
6370 | C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true; | |
6371 | } | |
1576dec7 | 6372 | } |
6373 | break; | |
6374 | case RID_OFFSETOF: | |
6375 | c_parser_consume_token (parser); | |
6376 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6377 | { | |
6378 | expr.value = error_mark_node; | |
1576dec7 | 6379 | break; |
6380 | } | |
6381 | t1 = c_parser_type_name (parser); | |
6382 | if (t1 == NULL) | |
26ee9e7a | 6383 | parser->error = true; |
1576dec7 | 6384 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
26ee9e7a | 6385 | gcc_assert (parser->error); |
6386 | if (parser->error) | |
1576dec7 | 6387 | { |
6388 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6389 | expr.value = error_mark_node; | |
1576dec7 | 6390 | break; |
6391 | } | |
26ee9e7a | 6392 | |
1576dec7 | 6393 | { |
a75b1c71 | 6394 | tree type = groktypename (t1, NULL, NULL); |
1576dec7 | 6395 | tree offsetof_ref; |
6396 | if (type == error_mark_node) | |
6397 | offsetof_ref = error_mark_node; | |
6398 | else | |
e60a6f7b | 6399 | { |
6400 | offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node); | |
6401 | SET_EXPR_LOCATION (offsetof_ref, loc); | |
6402 | } | |
1576dec7 | 6403 | /* Parse the second argument to __builtin_offsetof. We |
6404 | must have one identifier, and beyond that we want to | |
6405 | accept sub structure and sub array references. */ | |
6406 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
6407 | { | |
6408 | offsetof_ref = build_component_ref | |
e60a6f7b | 6409 | (loc, offsetof_ref, c_parser_peek_token (parser)->value); |
1576dec7 | 6410 | c_parser_consume_token (parser); |
6411 | while (c_parser_next_token_is (parser, CPP_DOT) | |
6412 | || c_parser_next_token_is (parser, | |
f0d0d842 | 6413 | CPP_OPEN_SQUARE) |
6414 | || c_parser_next_token_is (parser, | |
6415 | CPP_DEREF)) | |
1576dec7 | 6416 | { |
f0d0d842 | 6417 | if (c_parser_next_token_is (parser, CPP_DEREF)) |
6418 | { | |
6419 | loc = c_parser_peek_token (parser)->location; | |
e60a6f7b | 6420 | offsetof_ref = build_array_ref (loc, |
6421 | offsetof_ref, | |
6422 | integer_zero_node); | |
f0d0d842 | 6423 | goto do_dot; |
6424 | } | |
6425 | else if (c_parser_next_token_is (parser, CPP_DOT)) | |
1576dec7 | 6426 | { |
f0d0d842 | 6427 | do_dot: |
1576dec7 | 6428 | c_parser_consume_token (parser); |
6429 | if (c_parser_next_token_is_not (parser, | |
6430 | CPP_NAME)) | |
6431 | { | |
6432 | c_parser_error (parser, "expected identifier"); | |
6433 | break; | |
6434 | } | |
6435 | offsetof_ref = build_component_ref | |
e60a6f7b | 6436 | (loc, offsetof_ref, |
1576dec7 | 6437 | c_parser_peek_token (parser)->value); |
6438 | c_parser_consume_token (parser); | |
6439 | } | |
6440 | else | |
6441 | { | |
6442 | tree idx; | |
dda49785 | 6443 | loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6444 | c_parser_consume_token (parser); |
6445 | idx = c_parser_expression (parser).value; | |
a75b1c71 | 6446 | idx = c_fully_fold (idx, false, NULL); |
1576dec7 | 6447 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, |
6448 | "expected %<]%>"); | |
e60a6f7b | 6449 | offsetof_ref = build_array_ref (loc, offsetof_ref, idx); |
1576dec7 | 6450 | } |
6451 | } | |
6452 | } | |
6453 | else | |
6454 | c_parser_error (parser, "expected identifier"); | |
6455 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6456 | "expected %<)%>"); | |
7549df0d | 6457 | expr.value = fold_offsetof (offsetof_ref); |
1576dec7 | 6458 | } |
6459 | break; | |
6460 | case RID_CHOOSE_EXPR: | |
1576dec7 | 6461 | { |
a11dda8e | 6462 | VEC (c_expr_t, gc) *cexpr_list; |
6463 | c_expr_t *e1_p, *e2_p, *e3_p; | |
6464 | tree c; | |
1576dec7 | 6465 | |
6cf89e04 | 6466 | c_parser_consume_token (parser); |
6467 | if (!c_parser_get_builtin_args (parser, | |
6468 | "__builtin_choose_expr", | |
a11dda8e | 6469 | &cexpr_list)) |
6cf89e04 | 6470 | { |
6471 | expr.value = error_mark_node; | |
6472 | break; | |
6473 | } | |
6474 | ||
a11dda8e | 6475 | if (VEC_length (c_expr_t, cexpr_list) != 3) |
6cf89e04 | 6476 | { |
6477 | error_at (loc, "wrong number of arguments to " | |
6478 | "%<__builtin_choose_expr%>"); | |
6479 | expr.value = error_mark_node; | |
6480 | break; | |
6481 | } | |
a11dda8e | 6482 | |
6483 | e1_p = VEC_index (c_expr_t, cexpr_list, 0); | |
6484 | e2_p = VEC_index (c_expr_t, cexpr_list, 1); | |
6485 | e3_p = VEC_index (c_expr_t, cexpr_list, 2); | |
6486 | ||
6487 | c = e1_p->value; | |
6488 | mark_exp_read (e2_p->value); | |
6489 | mark_exp_read (e3_p->value); | |
a75b1c71 | 6490 | if (TREE_CODE (c) != INTEGER_CST |
6491 | || !INTEGRAL_TYPE_P (TREE_TYPE (c))) | |
e3b80d49 | 6492 | error_at (loc, |
6493 | "first argument to %<__builtin_choose_expr%> not" | |
6494 | " a constant"); | |
a75b1c71 | 6495 | constant_expression_warning (c); |
a11dda8e | 6496 | expr = integer_zerop (c) ? *e3_p : *e2_p; |
6cf89e04 | 6497 | break; |
1576dec7 | 6498 | } |
1576dec7 | 6499 | case RID_TYPES_COMPATIBLE_P: |
6500 | c_parser_consume_token (parser); | |
6501 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6502 | { | |
6503 | expr.value = error_mark_node; | |
1576dec7 | 6504 | break; |
6505 | } | |
6506 | t1 = c_parser_type_name (parser); | |
6507 | if (t1 == NULL) | |
6508 | { | |
6509 | expr.value = error_mark_node; | |
1576dec7 | 6510 | break; |
6511 | } | |
6512 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
6513 | { | |
6514 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6515 | expr.value = error_mark_node; | |
1576dec7 | 6516 | break; |
6517 | } | |
6518 | t2 = c_parser_type_name (parser); | |
6519 | if (t2 == NULL) | |
6520 | { | |
6521 | expr.value = error_mark_node; | |
1576dec7 | 6522 | break; |
6523 | } | |
6524 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6525 | "expected %<)%>"); | |
6526 | { | |
6527 | tree e1, e2; | |
6528 | ||
a75b1c71 | 6529 | e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL)); |
6530 | e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL)); | |
1576dec7 | 6531 | |
2512209b | 6532 | expr.value |
6533 | = comptypes (e1, e2) ? integer_one_node : integer_zero_node; | |
1576dec7 | 6534 | } |
6535 | break; | |
bff4ad11 | 6536 | case RID_BUILTIN_COMPLEX: |
a11dda8e | 6537 | { |
6538 | VEC(c_expr_t, gc) *cexpr_list; | |
6539 | c_expr_t *e1_p, *e2_p; | |
6540 | ||
6cf89e04 | 6541 | c_parser_consume_token (parser); |
6542 | if (!c_parser_get_builtin_args (parser, | |
6543 | "__builtin_complex", | |
a11dda8e | 6544 | &cexpr_list)) |
6cf89e04 | 6545 | { |
6546 | expr.value = error_mark_node; | |
6547 | break; | |
6548 | } | |
6549 | ||
a11dda8e | 6550 | if (VEC_length (c_expr_t, cexpr_list) != 2) |
6cf89e04 | 6551 | { |
6552 | error_at (loc, "wrong number of arguments to " | |
6553 | "%<__builtin_complex%>"); | |
6554 | expr.value = error_mark_node; | |
6555 | break; | |
6556 | } | |
a11dda8e | 6557 | |
6558 | e1_p = VEC_index (c_expr_t, cexpr_list, 0); | |
6559 | e2_p = VEC_index (c_expr_t, cexpr_list, 1); | |
6560 | ||
6561 | mark_exp_read (e1_p->value); | |
6562 | if (TREE_CODE (e1_p->value) == EXCESS_PRECISION_EXPR) | |
6563 | e1_p->value = convert (TREE_TYPE (e1_p->value), | |
6564 | TREE_OPERAND (e1_p->value, 0)); | |
6565 | mark_exp_read (e2_p->value); | |
6566 | if (TREE_CODE (e2_p->value) == EXCESS_PRECISION_EXPR) | |
6567 | e2_p->value = convert (TREE_TYPE (e2_p->value), | |
6568 | TREE_OPERAND (e2_p->value, 0)); | |
6569 | if (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (e1_p->value)) | |
6570 | || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e1_p->value)) | |
6571 | || !SCALAR_FLOAT_TYPE_P (TREE_TYPE (e2_p->value)) | |
6572 | || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e2_p->value))) | |
6cf89e04 | 6573 | { |
6574 | error_at (loc, "%<__builtin_complex%> operand " | |
6575 | "not of real binary floating-point type"); | |
6576 | expr.value = error_mark_node; | |
6577 | break; | |
6578 | } | |
a11dda8e | 6579 | if (TYPE_MAIN_VARIANT (TREE_TYPE (e1_p->value)) |
6580 | != TYPE_MAIN_VARIANT (TREE_TYPE (e2_p->value))) | |
6cf89e04 | 6581 | { |
6582 | error_at (loc, | |
6583 | "%<__builtin_complex%> operands of different types"); | |
6584 | expr.value = error_mark_node; | |
6585 | break; | |
6586 | } | |
6587 | if (!flag_isoc99) | |
6588 | pedwarn (loc, OPT_pedantic, | |
6589 | "ISO C90 does not support complex types"); | |
6590 | expr.value = build2 (COMPLEX_EXPR, | |
a11dda8e | 6591 | build_complex_type |
6592 | (TYPE_MAIN_VARIANT | |
6593 | (TREE_TYPE (e1_p->value))), | |
6594 | e1_p->value, e2_p->value); | |
6cf89e04 | 6595 | break; |
6596 | } | |
6597 | case RID_BUILTIN_SHUFFLE: | |
6598 | { | |
a11dda8e | 6599 | VEC(c_expr_t,gc) *cexpr_list; |
6600 | ||
6cf89e04 | 6601 | c_parser_consume_token (parser); |
6602 | if (!c_parser_get_builtin_args (parser, | |
6603 | "__builtin_shuffle", | |
a11dda8e | 6604 | &cexpr_list)) |
6cf89e04 | 6605 | { |
6606 | expr.value = error_mark_node; | |
6607 | break; | |
6608 | } | |
6609 | ||
a11dda8e | 6610 | if (VEC_length (c_expr_t, cexpr_list) == 2) |
6611 | expr.value = | |
f4803722 | 6612 | c_build_vec_perm_expr |
a11dda8e | 6613 | (loc, VEC_index (c_expr_t, cexpr_list, 0)->value, |
6614 | NULL_TREE, VEC_index (c_expr_t, cexpr_list, 1)->value); | |
6615 | ||
6616 | else if (VEC_length (c_expr_t, cexpr_list) == 3) | |
6617 | expr.value = | |
f4803722 | 6618 | c_build_vec_perm_expr |
a11dda8e | 6619 | (loc, VEC_index (c_expr_t, cexpr_list, 0)->value, |
6620 | VEC_index (c_expr_t, cexpr_list, 1)->value, | |
6621 | VEC_index (c_expr_t, cexpr_list, 2)->value); | |
6cf89e04 | 6622 | else |
6623 | { | |
6624 | error_at (loc, "wrong number of arguments to " | |
6625 | "%<__builtin_shuffle%>"); | |
6626 | expr.value = error_mark_node; | |
6627 | } | |
6628 | break; | |
6629 | } | |
1576dec7 | 6630 | case RID_AT_SELECTOR: |
6631 | gcc_assert (c_dialect_objc ()); | |
6632 | c_parser_consume_token (parser); | |
6633 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6634 | { | |
6635 | expr.value = error_mark_node; | |
1576dec7 | 6636 | break; |
6637 | } | |
6638 | { | |
6639 | tree sel = c_parser_objc_selector_arg (parser); | |
6640 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6641 | "expected %<)%>"); | |
e60a6f7b | 6642 | expr.value = objc_build_selector_expr (loc, sel); |
1576dec7 | 6643 | } |
6644 | break; | |
6645 | case RID_AT_PROTOCOL: | |
6646 | gcc_assert (c_dialect_objc ()); | |
6647 | c_parser_consume_token (parser); | |
6648 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6649 | { | |
6650 | expr.value = error_mark_node; | |
1576dec7 | 6651 | break; |
6652 | } | |
6653 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6654 | { | |
6655 | c_parser_error (parser, "expected identifier"); | |
6656 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6657 | expr.value = error_mark_node; | |
1576dec7 | 6658 | break; |
6659 | } | |
6660 | { | |
6661 | tree id = c_parser_peek_token (parser)->value; | |
6662 | c_parser_consume_token (parser); | |
6663 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6664 | "expected %<)%>"); | |
6665 | expr.value = objc_build_protocol_expr (id); | |
1576dec7 | 6666 | } |
6667 | break; | |
6668 | case RID_AT_ENCODE: | |
6669 | /* Extension to support C-structures in the archiver. */ | |
6670 | gcc_assert (c_dialect_objc ()); | |
6671 | c_parser_consume_token (parser); | |
6672 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6673 | { | |
6674 | expr.value = error_mark_node; | |
1576dec7 | 6675 | break; |
6676 | } | |
6677 | t1 = c_parser_type_name (parser); | |
6678 | if (t1 == NULL) | |
6679 | { | |
6680 | expr.value = error_mark_node; | |
1576dec7 | 6681 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
6682 | break; | |
6683 | } | |
6684 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6685 | "expected %<)%>"); | |
6686 | { | |
a75b1c71 | 6687 | tree type = groktypename (t1, NULL, NULL); |
1576dec7 | 6688 | expr.value = objc_build_encode_expr (type); |
1576dec7 | 6689 | } |
6690 | break; | |
6691 | default: | |
6692 | c_parser_error (parser, "expected expression"); | |
6693 | expr.value = error_mark_node; | |
1576dec7 | 6694 | break; |
6695 | } | |
6696 | break; | |
6697 | case CPP_OPEN_SQUARE: | |
6698 | if (c_dialect_objc ()) | |
6699 | { | |
6700 | tree receiver, args; | |
6701 | c_parser_consume_token (parser); | |
6702 | receiver = c_parser_objc_receiver (parser); | |
6703 | args = c_parser_objc_message_args (parser); | |
6704 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
6705 | "expected %<]%>"); | |
4185cf58 | 6706 | expr.value = objc_build_message_expr (receiver, args); |
1576dec7 | 6707 | break; |
6708 | } | |
6709 | /* Else fall through to report error. */ | |
6710 | default: | |
6711 | c_parser_error (parser, "expected expression"); | |
6712 | expr.value = error_mark_node; | |
1576dec7 | 6713 | break; |
6714 | } | |
e60a6f7b | 6715 | return c_parser_postfix_expression_after_primary (parser, loc, expr); |
1576dec7 | 6716 | } |
6717 | ||
6718 | /* Parse a postfix expression after a parenthesized type name: the | |
6719 | brace-enclosed initializer of a compound literal, possibly followed | |
6720 | by some postfix operators. This is separate because it is not | |
6721 | possible to tell until after the type name whether a cast | |
6722 | expression has a cast or a compound literal, or whether the operand | |
6723 | of sizeof is a parenthesized type name or starts with a compound | |
0b09525f | 6724 | literal. TYPE_LOC is the location where TYPE_NAME starts--the |
6725 | location of the first token after the parentheses around the type | |
6726 | name. */ | |
1576dec7 | 6727 | |
6728 | static struct c_expr | |
6729 | c_parser_postfix_expression_after_paren_type (c_parser *parser, | |
0b09525f | 6730 | struct c_type_name *type_name, |
6731 | location_t type_loc) | |
1576dec7 | 6732 | { |
6733 | tree type; | |
6734 | struct c_expr init; | |
a75b1c71 | 6735 | bool non_const; |
1576dec7 | 6736 | struct c_expr expr; |
be9eba16 | 6737 | location_t start_loc; |
a75b1c71 | 6738 | tree type_expr = NULL_TREE; |
6739 | bool type_expr_const = true; | |
e60a6f7b | 6740 | check_compound_literal_type (type_loc, type_name); |
1576dec7 | 6741 | start_init (NULL_TREE, NULL, 0); |
a75b1c71 | 6742 | type = groktypename (type_name, &type_expr, &type_expr_const); |
be9eba16 | 6743 | start_loc = c_parser_peek_token (parser)->location; |
481f0237 | 6744 | if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type)) |
1576dec7 | 6745 | { |
0b09525f | 6746 | error_at (type_loc, "compound literal has variable size"); |
1576dec7 | 6747 | type = error_mark_node; |
6748 | } | |
6749 | init = c_parser_braced_init (parser, type, false); | |
6750 | finish_init (); | |
6751 | maybe_warn_string_init (type, init); | |
6752 | ||
6d5d708e | 6753 | if (type != error_mark_node |
6754 | && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type)) | |
6755 | && current_function_decl) | |
6756 | { | |
6757 | error ("compound literal qualified by address-space qualifier"); | |
6758 | type = error_mark_node; | |
6759 | } | |
6760 | ||
8864917d | 6761 | if (!flag_isoc99) |
21ca8540 | 6762 | pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals"); |
a75b1c71 | 6763 | non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR) |
6764 | ? CONSTRUCTOR_NON_CONST (init.value) | |
6765 | : init.original_code == C_MAYBE_CONST_EXPR); | |
6766 | non_const |= !type_expr_const; | |
e60a6f7b | 6767 | expr.value = build_compound_literal (start_loc, type, init.value, non_const); |
1576dec7 | 6768 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6769 | expr.original_type = NULL; |
a75b1c71 | 6770 | if (type_expr) |
6771 | { | |
6772 | if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR) | |
6773 | { | |
6774 | gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE); | |
6775 | C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr; | |
6776 | } | |
6777 | else | |
6778 | { | |
6779 | gcc_assert (!non_const); | |
6780 | expr.value = build2 (C_MAYBE_CONST_EXPR, type, | |
6781 | type_expr, expr.value); | |
6782 | } | |
6783 | } | |
e60a6f7b | 6784 | return c_parser_postfix_expression_after_primary (parser, start_loc, expr); |
1576dec7 | 6785 | } |
6786 | ||
6787 | /* Parse a postfix expression after the initial primary or compound | |
e60a6f7b | 6788 | literal; that is, parse a series of postfix operators. |
6789 | ||
6790 | EXPR_LOC is the location of the primary expression. */ | |
1576dec7 | 6791 | |
6792 | static struct c_expr | |
6793 | c_parser_postfix_expression_after_primary (c_parser *parser, | |
e60a6f7b | 6794 | location_t expr_loc, |
1576dec7 | 6795 | struct c_expr expr) |
6796 | { | |
a75b1c71 | 6797 | struct c_expr orig_expr; |
b9c74b4d | 6798 | tree ident, idx; |
6799 | VEC(tree,gc) *exprlist; | |
6800 | VEC(tree,gc) *origtypes; | |
1576dec7 | 6801 | while (true) |
6802 | { | |
e60a6f7b | 6803 | location_t op_loc = c_parser_peek_token (parser)->location; |
1576dec7 | 6804 | switch (c_parser_peek_token (parser)->type) |
6805 | { | |
6806 | case CPP_OPEN_SQUARE: | |
6807 | /* Array reference. */ | |
6808 | c_parser_consume_token (parser); | |
6809 | idx = c_parser_expression (parser).value; | |
6810 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
6811 | "expected %<]%>"); | |
e60a6f7b | 6812 | expr.value = build_array_ref (op_loc, expr.value, idx); |
1576dec7 | 6813 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6814 | expr.original_type = NULL; |
1576dec7 | 6815 | break; |
6816 | case CPP_OPEN_PAREN: | |
6817 | /* Function call. */ | |
6818 | c_parser_consume_token (parser); | |
6819 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
b9c74b4d | 6820 | exprlist = NULL; |
1576dec7 | 6821 | else |
b9c74b4d | 6822 | exprlist = c_parser_expr_list (parser, true, false, &origtypes); |
1576dec7 | 6823 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
6824 | "expected %<)%>"); | |
a75b1c71 | 6825 | orig_expr = expr; |
abc6c64f | 6826 | mark_exp_read (expr.value); |
e60a6f7b | 6827 | /* FIXME diagnostics: Ideally we want the FUNCNAME, not the |
6828 | "(" after the FUNCNAME, which is what we have now. */ | |
6829 | expr.value = build_function_call_vec (op_loc, expr.value, exprlist, | |
b9c74b4d | 6830 | origtypes); |
1576dec7 | 6831 | expr.original_code = ERROR_MARK; |
a75b1c71 | 6832 | if (TREE_CODE (expr.value) == INTEGER_CST |
6833 | && TREE_CODE (orig_expr.value) == FUNCTION_DECL | |
6834 | && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL | |
6835 | && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P) | |
6836 | expr.original_code = C_MAYBE_CONST_EXPR; | |
841fdaa6 | 6837 | expr.original_type = NULL; |
b9c74b4d | 6838 | if (exprlist != NULL) |
6839 | { | |
f352a3fb | 6840 | release_tree_vector (exprlist); |
6841 | release_tree_vector (origtypes); | |
b9c74b4d | 6842 | } |
1576dec7 | 6843 | break; |
6844 | case CPP_DOT: | |
6845 | /* Structure element reference. */ | |
6846 | c_parser_consume_token (parser); | |
e60a6f7b | 6847 | expr = default_function_array_conversion (expr_loc, expr); |
1576dec7 | 6848 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6849 | ident = c_parser_peek_token (parser)->value; | |
6850 | else | |
6851 | { | |
6852 | c_parser_error (parser, "expected identifier"); | |
6853 | expr.value = error_mark_node; | |
6854 | expr.original_code = ERROR_MARK; | |
841fdaa6 | 6855 | expr.original_type = NULL; |
1576dec7 | 6856 | return expr; |
6857 | } | |
6858 | c_parser_consume_token (parser); | |
e60a6f7b | 6859 | expr.value = build_component_ref (op_loc, expr.value, ident); |
1576dec7 | 6860 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6861 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6862 | expr.original_type = NULL; | |
6863 | else | |
6864 | { | |
6865 | /* Remember the original type of a bitfield. */ | |
6866 | tree field = TREE_OPERAND (expr.value, 1); | |
6867 | if (TREE_CODE (field) != FIELD_DECL) | |
6868 | expr.original_type = NULL; | |
6869 | else | |
6870 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6871 | } | |
1576dec7 | 6872 | break; |
6873 | case CPP_DEREF: | |
6874 | /* Structure element reference. */ | |
6875 | c_parser_consume_token (parser); | |
e60a6f7b | 6876 | expr = default_function_array_conversion (expr_loc, expr); |
1576dec7 | 6877 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6878 | ident = c_parser_peek_token (parser)->value; | |
6879 | else | |
6880 | { | |
6881 | c_parser_error (parser, "expected identifier"); | |
6882 | expr.value = error_mark_node; | |
6883 | expr.original_code = ERROR_MARK; | |
841fdaa6 | 6884 | expr.original_type = NULL; |
1576dec7 | 6885 | return expr; |
6886 | } | |
6887 | c_parser_consume_token (parser); | |
e60a6f7b | 6888 | expr.value = build_component_ref (op_loc, |
6889 | build_indirect_ref (op_loc, | |
b6889cb0 | 6890 | expr.value, |
f08923b3 | 6891 | RO_ARROW), |
dda49785 | 6892 | ident); |
1576dec7 | 6893 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6894 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6895 | expr.original_type = NULL; | |
6896 | else | |
6897 | { | |
6898 | /* Remember the original type of a bitfield. */ | |
6899 | tree field = TREE_OPERAND (expr.value, 1); | |
6900 | if (TREE_CODE (field) != FIELD_DECL) | |
6901 | expr.original_type = NULL; | |
6902 | else | |
6903 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6904 | } | |
1576dec7 | 6905 | break; |
6906 | case CPP_PLUS_PLUS: | |
6907 | /* Postincrement. */ | |
6908 | c_parser_consume_token (parser); | |
abc6c64f | 6909 | expr = default_function_array_read_conversion (expr_loc, expr); |
e60a6f7b | 6910 | expr.value = build_unary_op (op_loc, |
b6889cb0 | 6911 | POSTINCREMENT_EXPR, expr.value, 0); |
1576dec7 | 6912 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6913 | expr.original_type = NULL; |
1576dec7 | 6914 | break; |
6915 | case CPP_MINUS_MINUS: | |
6916 | /* Postdecrement. */ | |
6917 | c_parser_consume_token (parser); | |
abc6c64f | 6918 | expr = default_function_array_read_conversion (expr_loc, expr); |
e60a6f7b | 6919 | expr.value = build_unary_op (op_loc, |
b6889cb0 | 6920 | POSTDECREMENT_EXPR, expr.value, 0); |
1576dec7 | 6921 | expr.original_code = ERROR_MARK; |
841fdaa6 | 6922 | expr.original_type = NULL; |
1576dec7 | 6923 | break; |
6924 | default: | |
6925 | return expr; | |
6926 | } | |
6927 | } | |
6928 | } | |
6929 | ||
6930 | /* Parse an expression (C90 6.3.17, C99 6.5.17). | |
6931 | ||
6932 | expression: | |
6933 | assignment-expression | |
6934 | expression , assignment-expression | |
6935 | */ | |
6936 | ||
6937 | static struct c_expr | |
6938 | c_parser_expression (c_parser *parser) | |
6939 | { | |
6940 | struct c_expr expr; | |
6941 | expr = c_parser_expr_no_commas (parser, NULL); | |
6942 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
6943 | { | |
6944 | struct c_expr next; | |
b2af2a93 | 6945 | tree lhsval; |
e60a6f7b | 6946 | location_t loc = c_parser_peek_token (parser)->location; |
6947 | location_t expr_loc; | |
1576dec7 | 6948 | c_parser_consume_token (parser); |
e60a6f7b | 6949 | expr_loc = c_parser_peek_token (parser)->location; |
b2af2a93 | 6950 | lhsval = expr.value; |
6951 | while (TREE_CODE (lhsval) == COMPOUND_EXPR) | |
6952 | lhsval = TREE_OPERAND (lhsval, 1); | |
6953 | if (DECL_P (lhsval) || handled_component_p (lhsval)) | |
6954 | mark_exp_read (lhsval); | |
1576dec7 | 6955 | next = c_parser_expr_no_commas (parser, NULL); |
e60a6f7b | 6956 | next = default_function_array_conversion (expr_loc, next); |
6957 | expr.value = build_compound_expr (loc, expr.value, next.value); | |
1576dec7 | 6958 | expr.original_code = COMPOUND_EXPR; |
bc620c5c | 6959 | expr.original_type = next.original_type; |
1576dec7 | 6960 | } |
6961 | return expr; | |
6962 | } | |
6963 | ||
f14c8207 | 6964 | /* Parse an expression and convert functions or arrays to |
6965 | pointers. */ | |
6966 | ||
6967 | static struct c_expr | |
6968 | c_parser_expression_conv (c_parser *parser) | |
6969 | { | |
6970 | struct c_expr expr; | |
e60a6f7b | 6971 | location_t loc = c_parser_peek_token (parser)->location; |
f14c8207 | 6972 | expr = c_parser_expression (parser); |
e60a6f7b | 6973 | expr = default_function_array_conversion (loc, expr); |
f14c8207 | 6974 | return expr; |
6975 | } | |
6976 | ||
6977 | /* Parse a non-empty list of expressions. If CONVERT_P, convert | |
a75b1c71 | 6978 | functions and arrays to pointers. If FOLD_P, fold the expressions. |
1576dec7 | 6979 | |
6980 | nonempty-expr-list: | |
6981 | assignment-expression | |
6982 | nonempty-expr-list , assignment-expression | |
6983 | */ | |
6984 | ||
b9c74b4d | 6985 | static VEC(tree,gc) * |
6986 | c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p, | |
6987 | VEC(tree,gc) **p_orig_types) | |
1576dec7 | 6988 | { |
b9c74b4d | 6989 | VEC(tree,gc) *ret; |
6990 | VEC(tree,gc) *orig_types; | |
1576dec7 | 6991 | struct c_expr expr; |
e60a6f7b | 6992 | location_t loc = c_parser_peek_token (parser)->location; |
b9c74b4d | 6993 | |
f352a3fb | 6994 | ret = make_tree_vector (); |
b9c74b4d | 6995 | if (p_orig_types == NULL) |
6996 | orig_types = NULL; | |
6997 | else | |
f352a3fb | 6998 | orig_types = make_tree_vector (); |
b9c74b4d | 6999 | |
1576dec7 | 7000 | expr = c_parser_expr_no_commas (parser, NULL); |
f14c8207 | 7001 | if (convert_p) |
abc6c64f | 7002 | expr = default_function_array_read_conversion (loc, expr); |
a75b1c71 | 7003 | if (fold_p) |
7004 | expr.value = c_fully_fold (expr.value, false, NULL); | |
b9c74b4d | 7005 | VEC_quick_push (tree, ret, expr.value); |
7006 | if (orig_types != NULL) | |
7007 | VEC_quick_push (tree, orig_types, expr.original_type); | |
1576dec7 | 7008 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
7009 | { | |
7010 | c_parser_consume_token (parser); | |
e60a6f7b | 7011 | loc = c_parser_peek_token (parser)->location; |
1576dec7 | 7012 | expr = c_parser_expr_no_commas (parser, NULL); |
f14c8207 | 7013 | if (convert_p) |
abc6c64f | 7014 | expr = default_function_array_read_conversion (loc, expr); |
a75b1c71 | 7015 | if (fold_p) |
7016 | expr.value = c_fully_fold (expr.value, false, NULL); | |
b9c74b4d | 7017 | VEC_safe_push (tree, gc, ret, expr.value); |
7018 | if (orig_types != NULL) | |
7019 | VEC_safe_push (tree, gc, orig_types, expr.original_type); | |
1576dec7 | 7020 | } |
b9c74b4d | 7021 | if (orig_types != NULL) |
7022 | *p_orig_types = orig_types; | |
1576dec7 | 7023 | return ret; |
7024 | } | |
1576dec7 | 7025 | \f |
7026 | /* Parse Objective-C-specific constructs. */ | |
7027 | ||
7028 | /* Parse an objc-class-definition. | |
7029 | ||
7030 | objc-class-definition: | |
7031 | @interface identifier objc-superclass[opt] objc-protocol-refs[opt] | |
7032 | objc-class-instance-variables[opt] objc-methodprotolist @end | |
7033 | @implementation identifier objc-superclass[opt] | |
7034 | objc-class-instance-variables[opt] | |
7035 | @interface identifier ( identifier ) objc-protocol-refs[opt] | |
7036 | objc-methodprotolist @end | |
e16610d0 | 7037 | @interface identifier ( ) objc-protocol-refs[opt] |
7038 | objc-methodprotolist @end | |
1576dec7 | 7039 | @implementation identifier ( identifier ) |
7040 | ||
7041 | objc-superclass: | |
7042 | : identifier | |
7043 | ||
7044 | "@interface identifier (" must start "@interface identifier ( | |
7045 | identifier ) ...": objc-methodprotolist in the first production may | |
442e3cb9 | 7046 | not start with a parenthesized identifier as a declarator of a data |
1576dec7 | 7047 | definition with no declaration specifiers if the objc-superclass, |
7048 | objc-protocol-refs and objc-class-instance-variables are omitted. */ | |
7049 | ||
7050 | static void | |
a336eb4b | 7051 | c_parser_objc_class_definition (c_parser *parser, tree attributes) |
1576dec7 | 7052 | { |
7053 | bool iface_p; | |
7054 | tree id1; | |
7055 | tree superclass; | |
7056 | if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE)) | |
7057 | iface_p = true; | |
7058 | else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION)) | |
7059 | iface_p = false; | |
7060 | else | |
7061 | gcc_unreachable (); | |
a336eb4b | 7062 | |
1576dec7 | 7063 | c_parser_consume_token (parser); |
7064 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7065 | { | |
7066 | c_parser_error (parser, "expected identifier"); | |
7067 | return; | |
7068 | } | |
7069 | id1 = c_parser_peek_token (parser)->value; | |
7070 | c_parser_consume_token (parser); | |
7071 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7072 | { | |
e16610d0 | 7073 | /* We have a category or class extension. */ |
1576dec7 | 7074 | tree id2; |
7075 | tree proto = NULL_TREE; | |
7076 | c_parser_consume_token (parser); | |
7077 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7078 | { | |
e16610d0 | 7079 | if (iface_p && c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) |
7080 | { | |
7081 | /* We have a class extension. */ | |
7082 | id2 = NULL_TREE; | |
7083 | } | |
7084 | else | |
7085 | { | |
7086 | c_parser_error (parser, "expected identifier or %<)%>"); | |
7087 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
7088 | return; | |
7089 | } | |
7090 | } | |
7091 | else | |
7092 | { | |
7093 | id2 = c_parser_peek_token (parser)->value; | |
7094 | c_parser_consume_token (parser); | |
1576dec7 | 7095 | } |
1576dec7 | 7096 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
7097 | if (!iface_p) | |
7098 | { | |
7099 | objc_start_category_implementation (id1, id2); | |
7100 | return; | |
7101 | } | |
7102 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7103 | proto = c_parser_objc_protocol_refs (parser); | |
a336eb4b | 7104 | objc_start_category_interface (id1, id2, proto, attributes); |
1576dec7 | 7105 | c_parser_objc_methodprotolist (parser); |
7106 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
7107 | objc_finish_interface (); | |
7108 | return; | |
7109 | } | |
7110 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
7111 | { | |
7112 | c_parser_consume_token (parser); | |
7113 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7114 | { | |
7115 | c_parser_error (parser, "expected identifier"); | |
7116 | return; | |
7117 | } | |
7118 | superclass = c_parser_peek_token (parser)->value; | |
7119 | c_parser_consume_token (parser); | |
7120 | } | |
7121 | else | |
7122 | superclass = NULL_TREE; | |
7123 | if (iface_p) | |
7124 | { | |
7125 | tree proto = NULL_TREE; | |
7126 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7127 | proto = c_parser_objc_protocol_refs (parser); | |
a336eb4b | 7128 | objc_start_class_interface (id1, superclass, proto, attributes); |
1576dec7 | 7129 | } |
7130 | else | |
7131 | objc_start_class_implementation (id1, superclass); | |
7132 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
7133 | c_parser_objc_class_instance_variables (parser); | |
7134 | if (iface_p) | |
7135 | { | |
7136 | objc_continue_interface (); | |
7137 | c_parser_objc_methodprotolist (parser); | |
7138 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
7139 | objc_finish_interface (); | |
7140 | } | |
7141 | else | |
7142 | { | |
7143 | objc_continue_implementation (); | |
7144 | return; | |
7145 | } | |
7146 | } | |
7147 | ||
7148 | /* Parse objc-class-instance-variables. | |
7149 | ||
7150 | objc-class-instance-variables: | |
7151 | { objc-instance-variable-decl-list[opt] } | |
7152 | ||
7153 | objc-instance-variable-decl-list: | |
7154 | objc-visibility-spec | |
7155 | objc-instance-variable-decl ; | |
7156 | ; | |
7157 | objc-instance-variable-decl-list objc-visibility-spec | |
7158 | objc-instance-variable-decl-list objc-instance-variable-decl ; | |
7159 | objc-instance-variable-decl-list ; | |
7160 | ||
7161 | objc-visibility-spec: | |
7162 | @private | |
7163 | @protected | |
7164 | @public | |
7165 | ||
7166 | objc-instance-variable-decl: | |
7167 | struct-declaration | |
7168 | */ | |
7169 | ||
7170 | static void | |
7171 | c_parser_objc_class_instance_variables (c_parser *parser) | |
7172 | { | |
7173 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); | |
7174 | c_parser_consume_token (parser); | |
7175 | while (c_parser_next_token_is_not (parser, CPP_EOF)) | |
7176 | { | |
7177 | tree decls; | |
7178 | /* Parse any stray semicolon. */ | |
7179 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7180 | { | |
48e1416a | 7181 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
7ef1fa91 | 7182 | "extra semicolon"); |
1576dec7 | 7183 | c_parser_consume_token (parser); |
7184 | continue; | |
7185 | } | |
7186 | /* Stop if at the end of the instance variables. */ | |
7187 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
7188 | { | |
7189 | c_parser_consume_token (parser); | |
7190 | break; | |
7191 | } | |
7192 | /* Parse any objc-visibility-spec. */ | |
e5c75ac3 | 7193 | if (c_parser_next_token_is_keyword (parser, RID_AT_PRIVATE)) |
1576dec7 | 7194 | { |
7195 | c_parser_consume_token (parser); | |
4a8875ed | 7196 | objc_set_visibility (OBJC_IVAR_VIS_PRIVATE); |
1576dec7 | 7197 | continue; |
7198 | } | |
e5c75ac3 | 7199 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PROTECTED)) |
1576dec7 | 7200 | { |
7201 | c_parser_consume_token (parser); | |
4a8875ed | 7202 | objc_set_visibility (OBJC_IVAR_VIS_PROTECTED); |
1576dec7 | 7203 | continue; |
7204 | } | |
e5c75ac3 | 7205 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PUBLIC)) |
1576dec7 | 7206 | { |
7207 | c_parser_consume_token (parser); | |
4a8875ed | 7208 | objc_set_visibility (OBJC_IVAR_VIS_PUBLIC); |
7209 | continue; | |
7210 | } | |
7211 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PACKAGE)) | |
7212 | { | |
7213 | c_parser_consume_token (parser); | |
7214 | objc_set_visibility (OBJC_IVAR_VIS_PACKAGE); | |
1576dec7 | 7215 | continue; |
7216 | } | |
b75b98aa | 7217 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
7218 | { | |
7219 | c_parser_pragma (parser, pragma_external); | |
7220 | continue; | |
7221 | } | |
7222 | ||
1576dec7 | 7223 | /* Parse some comma-separated declarations. */ |
7224 | decls = c_parser_struct_declaration (parser); | |
7ef1fa91 | 7225 | if (decls == NULL) |
7226 | { | |
7227 | /* There is a syntax error. We want to skip the offending | |
7228 | tokens up to the next ';' (included) or '}' | |
7229 | (excluded). */ | |
7230 | ||
7231 | /* First, skip manually a ')' or ']'. This is because they | |
7232 | reduce the nesting level, so c_parser_skip_until_found() | |
7233 | wouldn't be able to skip past them. */ | |
7234 | c_token *token = c_parser_peek_token (parser); | |
7235 | if (token->type == CPP_CLOSE_PAREN || token->type == CPP_CLOSE_SQUARE) | |
7236 | c_parser_consume_token (parser); | |
7237 | ||
7238 | /* Then, do the standard skipping. */ | |
7239 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7240 | ||
7241 | /* We hopefully recovered. Start normal parsing again. */ | |
7242 | parser->error = false; | |
7243 | continue; | |
7244 | } | |
7245 | else | |
7246 | { | |
7247 | /* Comma-separated instance variables are chained together | |
7248 | in reverse order; add them one by one. */ | |
7249 | tree ivar = nreverse (decls); | |
7250 | for (; ivar; ivar = DECL_CHAIN (ivar)) | |
7251 | objc_add_instance_variable (copy_node (ivar)); | |
7252 | } | |
1576dec7 | 7253 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7254 | } | |
7255 | } | |
7256 | ||
7257 | /* Parse an objc-class-declaration. | |
7258 | ||
7259 | objc-class-declaration: | |
7260 | @class identifier-list ; | |
7261 | */ | |
7262 | ||
7263 | static void | |
7264 | c_parser_objc_class_declaration (c_parser *parser) | |
7265 | { | |
e5c75ac3 | 7266 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_CLASS)); |
1576dec7 | 7267 | c_parser_consume_token (parser); |
7268 | /* Any identifiers, including those declared as type names, are OK | |
7269 | here. */ | |
7270 | while (true) | |
7271 | { | |
7272 | tree id; | |
7273 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7274 | { | |
7275 | c_parser_error (parser, "expected identifier"); | |
e1f293c0 | 7276 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); |
7277 | parser->error = false; | |
7278 | return; | |
1576dec7 | 7279 | } |
7280 | id = c_parser_peek_token (parser)->value; | |
29d7200d | 7281 | objc_declare_class (id); |
1576dec7 | 7282 | c_parser_consume_token (parser); |
7283 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7284 | c_parser_consume_token (parser); | |
7285 | else | |
7286 | break; | |
7287 | } | |
7288 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
1576dec7 | 7289 | } |
7290 | ||
7291 | /* Parse an objc-alias-declaration. | |
7292 | ||
7293 | objc-alias-declaration: | |
7294 | @compatibility_alias identifier identifier ; | |
7295 | */ | |
7296 | ||
7297 | static void | |
7298 | c_parser_objc_alias_declaration (c_parser *parser) | |
7299 | { | |
7300 | tree id1, id2; | |
7301 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS)); | |
7302 | c_parser_consume_token (parser); | |
7303 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7304 | { | |
7305 | c_parser_error (parser, "expected identifier"); | |
7306 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7307 | return; | |
7308 | } | |
7309 | id1 = c_parser_peek_token (parser)->value; | |
7310 | c_parser_consume_token (parser); | |
7311 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7312 | { | |
7313 | c_parser_error (parser, "expected identifier"); | |
7314 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7315 | return; | |
7316 | } | |
7317 | id2 = c_parser_peek_token (parser)->value; | |
7318 | c_parser_consume_token (parser); | |
7319 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
7320 | objc_declare_alias (id1, id2); | |
7321 | } | |
7322 | ||
7323 | /* Parse an objc-protocol-definition. | |
7324 | ||
7325 | objc-protocol-definition: | |
7326 | @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end | |
7327 | @protocol identifier-list ; | |
7328 | ||
7329 | "@protocol identifier ;" should be resolved as "@protocol | |
7330 | identifier-list ;": objc-methodprotolist may not start with a | |
7331 | semicolon in the first alternative if objc-protocol-refs are | |
7332 | omitted. */ | |
7333 | ||
7334 | static void | |
a336eb4b | 7335 | c_parser_objc_protocol_definition (c_parser *parser, tree attributes) |
1576dec7 | 7336 | { |
7337 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL)); | |
a336eb4b | 7338 | |
1576dec7 | 7339 | c_parser_consume_token (parser); |
7340 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7341 | { | |
7342 | c_parser_error (parser, "expected identifier"); | |
7343 | return; | |
7344 | } | |
7345 | if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA | |
7346 | || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON) | |
7347 | { | |
1576dec7 | 7348 | /* Any identifiers, including those declared as type names, are |
7349 | OK here. */ | |
7350 | while (true) | |
7351 | { | |
7352 | tree id; | |
7353 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7354 | { | |
7355 | c_parser_error (parser, "expected identifier"); | |
7356 | break; | |
7357 | } | |
7358 | id = c_parser_peek_token (parser)->value; | |
a758bf7d | 7359 | objc_declare_protocol (id, attributes); |
1576dec7 | 7360 | c_parser_consume_token (parser); |
7361 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7362 | c_parser_consume_token (parser); | |
7363 | else | |
7364 | break; | |
7365 | } | |
7366 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
1576dec7 | 7367 | } |
7368 | else | |
7369 | { | |
7370 | tree id = c_parser_peek_token (parser)->value; | |
7371 | tree proto = NULL_TREE; | |
7372 | c_parser_consume_token (parser); | |
7373 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7374 | proto = c_parser_objc_protocol_refs (parser); | |
920d59b0 | 7375 | parser->objc_pq_context = true; |
a336eb4b | 7376 | objc_start_protocol (id, proto, attributes); |
1576dec7 | 7377 | c_parser_objc_methodprotolist (parser); |
7378 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
920d59b0 | 7379 | parser->objc_pq_context = false; |
1576dec7 | 7380 | objc_finish_interface (); |
7381 | } | |
7382 | } | |
7383 | ||
7384 | /* Parse an objc-method-type. | |
7385 | ||
7386 | objc-method-type: | |
7387 | + | |
7388 | - | |
1576dec7 | 7389 | |
45b2b110 | 7390 | Return true if it is a class method (+) and false if it is |
7391 | an instance method (-). | |
7392 | */ | |
7393 | static inline bool | |
1576dec7 | 7394 | c_parser_objc_method_type (c_parser *parser) |
7395 | { | |
7396 | switch (c_parser_peek_token (parser)->type) | |
7397 | { | |
7398 | case CPP_PLUS: | |
7399 | c_parser_consume_token (parser); | |
45b2b110 | 7400 | return true; |
1576dec7 | 7401 | case CPP_MINUS: |
7402 | c_parser_consume_token (parser); | |
45b2b110 | 7403 | return false; |
1576dec7 | 7404 | default: |
7405 | gcc_unreachable (); | |
7406 | } | |
7407 | } | |
7408 | ||
7409 | /* Parse an objc-method-definition. | |
7410 | ||
7411 | objc-method-definition: | |
7412 | objc-method-type objc-method-decl ;[opt] compound-statement | |
7413 | */ | |
7414 | ||
7415 | static void | |
7416 | c_parser_objc_method_definition (c_parser *parser) | |
7417 | { | |
45b2b110 | 7418 | bool is_class_method = c_parser_objc_method_type (parser); |
4232a958 | 7419 | tree decl, attributes = NULL_TREE, expr = NULL_TREE; |
920d59b0 | 7420 | parser->objc_pq_context = true; |
4232a958 | 7421 | decl = c_parser_objc_method_decl (parser, is_class_method, &attributes, |
7422 | &expr); | |
03fc2271 | 7423 | if (decl == error_mark_node) |
7424 | return; /* Bail here. */ | |
7425 | ||
1576dec7 | 7426 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
7427 | { | |
7428 | c_parser_consume_token (parser); | |
48e1416a | 7429 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 7430 | "extra semicolon in method definition specified"); |
1576dec7 | 7431 | } |
03fc2271 | 7432 | |
169987fa | 7433 | if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
7434 | { | |
7435 | c_parser_error (parser, "expected %<{%>"); | |
7436 | return; | |
7437 | } | |
03fc2271 | 7438 | |
920d59b0 | 7439 | parser->objc_pq_context = false; |
4232a958 | 7440 | if (objc_start_method_definition (is_class_method, decl, attributes, expr)) |
d4a8fb25 | 7441 | { |
7442 | add_stmt (c_parser_compound_statement (parser)); | |
7443 | objc_finish_method_definition (current_function_decl); | |
7444 | } | |
7445 | else | |
7446 | { | |
7447 | /* This code is executed when we find a method definition | |
06517bd4 | 7448 | outside of an @implementation context (or invalid for other |
7449 | reasons). Parse the method (to keep going) but do not emit | |
7450 | any code. | |
d4a8fb25 | 7451 | */ |
7452 | c_parser_compound_statement (parser); | |
7453 | } | |
1576dec7 | 7454 | } |
7455 | ||
7456 | /* Parse an objc-methodprotolist. | |
7457 | ||
7458 | objc-methodprotolist: | |
7459 | empty | |
7460 | objc-methodprotolist objc-methodproto | |
7461 | objc-methodprotolist declaration | |
7462 | objc-methodprotolist ; | |
069761fb | 7463 | @optional |
7464 | @required | |
1576dec7 | 7465 | |
7466 | The declaration is a data definition, which may be missing | |
7467 | declaration specifiers under the same rules and diagnostics as | |
7468 | other data definitions outside functions, and the stray semicolon | |
7469 | is diagnosed the same way as a stray semicolon outside a | |
7470 | function. */ | |
7471 | ||
7472 | static void | |
7473 | c_parser_objc_methodprotolist (c_parser *parser) | |
7474 | { | |
7475 | while (true) | |
7476 | { | |
7477 | /* The list is terminated by @end. */ | |
7478 | switch (c_parser_peek_token (parser)->type) | |
7479 | { | |
7480 | case CPP_SEMICOLON: | |
48e1416a | 7481 | pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic, |
21ca8540 | 7482 | "ISO C does not allow extra %<;%> outside of a function"); |
1576dec7 | 7483 | c_parser_consume_token (parser); |
7484 | break; | |
7485 | case CPP_PLUS: | |
7486 | case CPP_MINUS: | |
7487 | c_parser_objc_methodproto (parser); | |
7488 | break; | |
a2952f2e | 7489 | case CPP_PRAGMA: |
7490 | c_parser_pragma (parser, pragma_external); | |
7491 | break; | |
1576dec7 | 7492 | case CPP_EOF: |
7493 | return; | |
7494 | default: | |
7495 | if (c_parser_next_token_is_keyword (parser, RID_AT_END)) | |
7496 | return; | |
86c110ac | 7497 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY)) |
1d894bcf | 7498 | c_parser_objc_at_property_declaration (parser); |
069761fb | 7499 | else if (c_parser_next_token_is_keyword (parser, RID_AT_OPTIONAL)) |
7500 | { | |
7501 | objc_set_method_opt (true); | |
7502 | c_parser_consume_token (parser); | |
7503 | } | |
7504 | else if (c_parser_next_token_is_keyword (parser, RID_AT_REQUIRED)) | |
7505 | { | |
7506 | objc_set_method_opt (false); | |
7507 | c_parser_consume_token (parser); | |
7508 | } | |
7509 | else | |
7510 | c_parser_declaration_or_fndef (parser, false, false, true, | |
0a65c3bb | 7511 | false, true, NULL); |
1576dec7 | 7512 | break; |
7513 | } | |
7514 | } | |
7515 | } | |
7516 | ||
7517 | /* Parse an objc-methodproto. | |
7518 | ||
7519 | objc-methodproto: | |
7520 | objc-method-type objc-method-decl ; | |
7521 | */ | |
7522 | ||
7523 | static void | |
7524 | c_parser_objc_methodproto (c_parser *parser) | |
7525 | { | |
45b2b110 | 7526 | bool is_class_method = c_parser_objc_method_type (parser); |
03fc2271 | 7527 | tree decl, attributes = NULL_TREE; |
45b2b110 | 7528 | |
1576dec7 | 7529 | /* Remember protocol qualifiers in prototypes. */ |
920d59b0 | 7530 | parser->objc_pq_context = true; |
4232a958 | 7531 | decl = c_parser_objc_method_decl (parser, is_class_method, &attributes, |
7532 | NULL); | |
03fc2271 | 7533 | /* Forget protocol qualifiers now. */ |
920d59b0 | 7534 | parser->objc_pq_context = false; |
03fc2271 | 7535 | |
7536 | /* Do not allow the presence of attributes to hide an erroneous | |
7537 | method implementation in the interface section. */ | |
7538 | if (!c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7539 | { | |
7540 | c_parser_error (parser, "expected %<;%>"); | |
7541 | return; | |
7542 | } | |
7543 | ||
7544 | if (decl != error_mark_node) | |
45b2b110 | 7545 | objc_add_method_declaration (is_class_method, decl, attributes); |
03fc2271 | 7546 | |
1576dec7 | 7547 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7548 | } | |
7549 | ||
03fc2271 | 7550 | /* If we are at a position that method attributes may be present, check that |
7551 | there are not any parsed already (a syntax error) and then collect any | |
7552 | specified at the current location. Finally, if new attributes were present, | |
7553 | check that the next token is legal ( ';' for decls and '{' for defs). */ | |
7554 | ||
7555 | static bool | |
7556 | c_parser_objc_maybe_method_attributes (c_parser* parser, tree* attributes) | |
7557 | { | |
7558 | bool bad = false; | |
7559 | if (*attributes) | |
7560 | { | |
7561 | c_parser_error (parser, | |
7562 | "method attributes must be specified at the end only"); | |
7563 | *attributes = NULL_TREE; | |
7564 | bad = true; | |
7565 | } | |
7566 | ||
7567 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
7568 | *attributes = c_parser_attributes (parser); | |
7569 | ||
7570 | /* If there were no attributes here, just report any earlier error. */ | |
7571 | if (*attributes == NULL_TREE || bad) | |
7572 | return bad; | |
7573 | ||
7574 | /* If the attributes are followed by a ; or {, then just report any earlier | |
7575 | error. */ | |
7576 | if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
7577 | || c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
7578 | return bad; | |
7579 | ||
7580 | /* We've got attributes, but not at the end. */ | |
7581 | c_parser_error (parser, | |
7582 | "expected %<;%> or %<{%> after method attribute definition"); | |
7583 | return true; | |
7584 | } | |
7585 | ||
1576dec7 | 7586 | /* Parse an objc-method-decl. |
7587 | ||
7588 | objc-method-decl: | |
7589 | ( objc-type-name ) objc-selector | |
7590 | objc-selector | |
7591 | ( objc-type-name ) objc-keyword-selector objc-optparmlist | |
7592 | objc-keyword-selector objc-optparmlist | |
03fc2271 | 7593 | attributes |
1576dec7 | 7594 | |
7595 | objc-keyword-selector: | |
7596 | objc-keyword-decl | |
7597 | objc-keyword-selector objc-keyword-decl | |
7598 | ||
7599 | objc-keyword-decl: | |
7600 | objc-selector : ( objc-type-name ) identifier | |
7601 | objc-selector : identifier | |
7602 | : ( objc-type-name ) identifier | |
7603 | : identifier | |
7604 | ||
7605 | objc-optparmlist: | |
7606 | objc-optparms objc-optellipsis | |
7607 | ||
7608 | objc-optparms: | |
7609 | empty | |
7610 | objc-opt-parms , parameter-declaration | |
7611 | ||
7612 | objc-optellipsis: | |
7613 | empty | |
7614 | , ... | |
7615 | */ | |
7616 | ||
7617 | static tree | |
4232a958 | 7618 | c_parser_objc_method_decl (c_parser *parser, bool is_class_method, |
7619 | tree *attributes, tree *expr) | |
1576dec7 | 7620 | { |
7621 | tree type = NULL_TREE; | |
7622 | tree sel; | |
7623 | tree parms = NULL_TREE; | |
450302fe | 7624 | bool ellipsis = false; |
03fc2271 | 7625 | bool attr_err = false; |
450302fe | 7626 | |
03fc2271 | 7627 | *attributes = NULL_TREE; |
1576dec7 | 7628 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
7629 | { | |
7630 | c_parser_consume_token (parser); | |
7631 | type = c_parser_objc_type_name (parser); | |
7632 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7633 | } | |
7634 | sel = c_parser_objc_selector (parser); | |
7635 | /* If there is no selector, or a colon follows, we have an | |
7636 | objc-keyword-selector. If there is a selector, and a colon does | |
7637 | not follow, that selector ends the objc-method-decl. */ | |
7638 | if (!sel || c_parser_next_token_is (parser, CPP_COLON)) | |
7639 | { | |
7640 | tree tsel = sel; | |
7641 | tree list = NULL_TREE; | |
1576dec7 | 7642 | while (true) |
7643 | { | |
7644 | tree atype = NULL_TREE, id, keyworddecl; | |
03fc2271 | 7645 | tree param_attr = NULL_TREE; |
1576dec7 | 7646 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
7647 | break; | |
7648 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7649 | { | |
7650 | c_parser_consume_token (parser); | |
7651 | atype = c_parser_objc_type_name (parser); | |
7652 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7653 | "expected %<)%>"); | |
7654 | } | |
03fc2271 | 7655 | /* New ObjC allows attributes on method parameters. */ |
7656 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
7657 | param_attr = c_parser_attributes (parser); | |
1576dec7 | 7658 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
7659 | { | |
7660 | c_parser_error (parser, "expected identifier"); | |
7661 | return error_mark_node; | |
7662 | } | |
7663 | id = c_parser_peek_token (parser)->value; | |
7664 | c_parser_consume_token (parser); | |
03fc2271 | 7665 | keyworddecl = objc_build_keyword_decl (tsel, atype, id, param_attr); |
1576dec7 | 7666 | list = chainon (list, keyworddecl); |
7667 | tsel = c_parser_objc_selector (parser); | |
7668 | if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7669 | break; | |
7670 | } | |
03fc2271 | 7671 | |
7672 | attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ; | |
7673 | ||
1576dec7 | 7674 | /* Parse the optional parameter list. Optional Objective-C |
7675 | method parameters follow the C syntax, and may include '...' | |
7676 | to denote a variable number of arguments. */ | |
7677 | parms = make_node (TREE_LIST); | |
1576dec7 | 7678 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
7679 | { | |
7680 | struct c_parm *parm; | |
7681 | c_parser_consume_token (parser); | |
7682 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
7683 | { | |
7684 | ellipsis = true; | |
7685 | c_parser_consume_token (parser); | |
03fc2271 | 7686 | attr_err |= c_parser_objc_maybe_method_attributes |
7687 | (parser, attributes) ; | |
1576dec7 | 7688 | break; |
7689 | } | |
7690 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
7691 | if (parm == NULL) | |
7692 | break; | |
7693 | parms = chainon (parms, | |
4232a958 | 7694 | build_tree_list (NULL_TREE, grokparm (parm, expr))); |
1576dec7 | 7695 | } |
1576dec7 | 7696 | sel = list; |
7697 | } | |
03fc2271 | 7698 | else |
7699 | attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ; | |
7700 | ||
7701 | if (sel == NULL) | |
7702 | { | |
7703 | c_parser_error (parser, "objective-c method declaration is expected"); | |
7704 | return error_mark_node; | |
7705 | } | |
7706 | ||
7707 | if (attr_err) | |
7708 | return error_mark_node; | |
7709 | ||
45b2b110 | 7710 | return objc_build_method_signature (is_class_method, type, sel, parms, ellipsis); |
1576dec7 | 7711 | } |
7712 | ||
7713 | /* Parse an objc-type-name. | |
7714 | ||
7715 | objc-type-name: | |
7716 | objc-type-qualifiers[opt] type-name | |
7717 | objc-type-qualifiers[opt] | |
7718 | ||
7719 | objc-type-qualifiers: | |
7720 | objc-type-qualifier | |
7721 | objc-type-qualifiers objc-type-qualifier | |
7722 | ||
7723 | objc-type-qualifier: one of | |
7724 | in out inout bycopy byref oneway | |
7725 | */ | |
7726 | ||
7727 | static tree | |
7728 | c_parser_objc_type_name (c_parser *parser) | |
7729 | { | |
7730 | tree quals = NULL_TREE; | |
7d339f93 | 7731 | struct c_type_name *type_name = NULL; |
1576dec7 | 7732 | tree type = NULL_TREE; |
7733 | while (true) | |
7734 | { | |
7735 | c_token *token = c_parser_peek_token (parser); | |
7736 | if (token->type == CPP_KEYWORD | |
7737 | && (token->keyword == RID_IN | |
7738 | || token->keyword == RID_OUT | |
7739 | || token->keyword == RID_INOUT | |
7740 | || token->keyword == RID_BYCOPY | |
7741 | || token->keyword == RID_BYREF | |
7742 | || token->keyword == RID_ONEWAY)) | |
7743 | { | |
dd26ec9b | 7744 | quals = chainon (build_tree_list (NULL_TREE, token->value), quals); |
1576dec7 | 7745 | c_parser_consume_token (parser); |
7746 | } | |
7747 | else | |
7748 | break; | |
7749 | } | |
26ee9e7a | 7750 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_type)) |
7d339f93 | 7751 | type_name = c_parser_type_name (parser); |
7752 | if (type_name) | |
a75b1c71 | 7753 | type = groktypename (type_name, NULL, NULL); |
14a3bc63 | 7754 | |
7755 | /* If the type is unknown, and error has already been produced and | |
7756 | we need to recover from the error. In that case, use NULL_TREE | |
7757 | for the type, as if no type had been specified; this will use the | |
7758 | default type ('id') which is good for error recovery. */ | |
7759 | if (type == error_mark_node) | |
7760 | type = NULL_TREE; | |
7761 | ||
1576dec7 | 7762 | return build_tree_list (quals, type); |
7763 | } | |
7764 | ||
7765 | /* Parse objc-protocol-refs. | |
7766 | ||
7767 | objc-protocol-refs: | |
7768 | < identifier-list > | |
7769 | */ | |
7770 | ||
7771 | static tree | |
7772 | c_parser_objc_protocol_refs (c_parser *parser) | |
7773 | { | |
7774 | tree list = NULL_TREE; | |
7775 | gcc_assert (c_parser_next_token_is (parser, CPP_LESS)); | |
7776 | c_parser_consume_token (parser); | |
7777 | /* Any identifiers, including those declared as type names, are OK | |
7778 | here. */ | |
7779 | while (true) | |
7780 | { | |
7781 | tree id; | |
7782 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7783 | { | |
7784 | c_parser_error (parser, "expected identifier"); | |
7785 | break; | |
7786 | } | |
7787 | id = c_parser_peek_token (parser)->value; | |
7788 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
7789 | c_parser_consume_token (parser); | |
7790 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7791 | c_parser_consume_token (parser); | |
7792 | else | |
7793 | break; | |
7794 | } | |
7795 | c_parser_require (parser, CPP_GREATER, "expected %<>%>"); | |
7796 | return list; | |
7797 | } | |
7798 | ||
b3d2d312 | 7799 | /* Parse an objc-try-catch-finally-statement. |
1576dec7 | 7800 | |
b3d2d312 | 7801 | objc-try-catch-finally-statement: |
1576dec7 | 7802 | @try compound-statement objc-catch-list[opt] |
7803 | @try compound-statement objc-catch-list[opt] @finally compound-statement | |
7804 | ||
7805 | objc-catch-list: | |
b3d2d312 | 7806 | @catch ( objc-catch-parameter-declaration ) compound-statement |
7807 | objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement | |
7808 | ||
7809 | objc-catch-parameter-declaration: | |
7810 | parameter-declaration | |
7811 | '...' | |
7812 | ||
7813 | where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS. | |
7814 | ||
7815 | PS: This function is identical to cp_parser_objc_try_catch_finally_statement | |
7816 | for C++. Keep them in sync. */ | |
1576dec7 | 7817 | |
7818 | static void | |
b3d2d312 | 7819 | c_parser_objc_try_catch_finally_statement (c_parser *parser) |
1576dec7 | 7820 | { |
b3d2d312 | 7821 | location_t location; |
1576dec7 | 7822 | tree stmt; |
b3d2d312 | 7823 | |
e5c75ac3 | 7824 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY)); |
1576dec7 | 7825 | c_parser_consume_token (parser); |
b3d2d312 | 7826 | location = c_parser_peek_token (parser)->location; |
33b3681f | 7827 | objc_maybe_warn_exceptions (location); |
1576dec7 | 7828 | stmt = c_parser_compound_statement (parser); |
b3d2d312 | 7829 | objc_begin_try_stmt (location, stmt); |
7830 | ||
e5c75ac3 | 7831 | while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH)) |
1576dec7 | 7832 | { |
7833 | struct c_parm *parm; | |
b3d2d312 | 7834 | tree parameter_declaration = error_mark_node; |
7835 | bool seen_open_paren = false; | |
7836 | ||
1576dec7 | 7837 | c_parser_consume_token (parser); |
7838 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
b3d2d312 | 7839 | seen_open_paren = true; |
7840 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
1576dec7 | 7841 | { |
b3d2d312 | 7842 | /* We have "@catch (...)" (where the '...' are literally |
7843 | what is in the code). Skip the '...'. | |
7844 | parameter_declaration is set to NULL_TREE, and | |
7845 | objc_being_catch_clauses() knows that that means | |
7846 | '...'. */ | |
7847 | c_parser_consume_token (parser); | |
7848 | parameter_declaration = NULL_TREE; | |
1576dec7 | 7849 | } |
b3d2d312 | 7850 | else |
7851 | { | |
7852 | /* We have "@catch (NSException *exception)" or something | |
7853 | like that. Parse the parameter declaration. */ | |
7854 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
7855 | if (parm == NULL) | |
7856 | parameter_declaration = error_mark_node; | |
7857 | else | |
4232a958 | 7858 | parameter_declaration = grokparm (parm, NULL); |
b3d2d312 | 7859 | } |
7860 | if (seen_open_paren) | |
7861 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7862 | else | |
7863 | { | |
7864 | /* If there was no open parenthesis, we are recovering from | |
7865 | an error, and we are trying to figure out what mistake | |
7866 | the user has made. */ | |
7867 | ||
7868 | /* If there is an immediate closing parenthesis, the user | |
7869 | probably forgot the opening one (ie, they typed "@catch | |
7870 | NSException *e)". Parse the closing parenthesis and keep | |
7871 | going. */ | |
7872 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
7873 | c_parser_consume_token (parser); | |
7874 | ||
7875 | /* If these is no immediate closing parenthesis, the user | |
7876 | probably doesn't know that parenthesis are required at | |
7877 | all (ie, they typed "@catch NSException *e"). So, just | |
7878 | forget about the closing parenthesis and keep going. */ | |
7879 | } | |
7880 | objc_begin_catch_clause (parameter_declaration); | |
1576dec7 | 7881 | if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
7882 | c_parser_compound_statement_nostart (parser); | |
7883 | objc_finish_catch_clause (); | |
7884 | } | |
7885 | if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY)) | |
7886 | { | |
1576dec7 | 7887 | c_parser_consume_token (parser); |
b3d2d312 | 7888 | location = c_parser_peek_token (parser)->location; |
7889 | stmt = c_parser_compound_statement (parser); | |
7890 | objc_build_finally_clause (location, stmt); | |
1576dec7 | 7891 | } |
7892 | objc_finish_try_stmt (); | |
7893 | } | |
7894 | ||
7895 | /* Parse an objc-synchronized-statement. | |
7896 | ||
7897 | objc-synchronized-statement: | |
7898 | @synchronized ( expression ) compound-statement | |
7899 | */ | |
7900 | ||
7901 | static void | |
7902 | c_parser_objc_synchronized_statement (c_parser *parser) | |
7903 | { | |
7904 | location_t loc; | |
7905 | tree expr, stmt; | |
7906 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED)); | |
7907 | c_parser_consume_token (parser); | |
7908 | loc = c_parser_peek_token (parser)->location; | |
33b3681f | 7909 | objc_maybe_warn_exceptions (loc); |
1576dec7 | 7910 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
7911 | { | |
7912 | expr = c_parser_expression (parser).value; | |
a75b1c71 | 7913 | expr = c_fully_fold (expr, false, NULL); |
1576dec7 | 7914 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
7915 | } | |
7916 | else | |
7917 | expr = error_mark_node; | |
7918 | stmt = c_parser_compound_statement (parser); | |
7919 | objc_build_synchronized (loc, expr, stmt); | |
7920 | } | |
7921 | ||
7922 | /* Parse an objc-selector; return NULL_TREE without an error if the | |
7923 | next token is not an objc-selector. | |
7924 | ||
7925 | objc-selector: | |
7926 | identifier | |
7927 | one of | |
7928 | enum struct union if else while do for switch case default | |
7929 | break continue return goto asm sizeof typeof __alignof | |
7930 | unsigned long const short volatile signed restrict _Complex | |
7931 | in out inout bycopy byref oneway int char float double void _Bool | |
7932 | ||
7933 | ??? Why this selection of keywords but not, for example, storage | |
7934 | class specifiers? */ | |
7935 | ||
7936 | static tree | |
7937 | c_parser_objc_selector (c_parser *parser) | |
7938 | { | |
7939 | c_token *token = c_parser_peek_token (parser); | |
7940 | tree value = token->value; | |
7941 | if (token->type == CPP_NAME) | |
7942 | { | |
7943 | c_parser_consume_token (parser); | |
7944 | return value; | |
7945 | } | |
7946 | if (token->type != CPP_KEYWORD) | |
7947 | return NULL_TREE; | |
7948 | switch (token->keyword) | |
7949 | { | |
7950 | case RID_ENUM: | |
7951 | case RID_STRUCT: | |
7952 | case RID_UNION: | |
7953 | case RID_IF: | |
7954 | case RID_ELSE: | |
7955 | case RID_WHILE: | |
7956 | case RID_DO: | |
7957 | case RID_FOR: | |
7958 | case RID_SWITCH: | |
7959 | case RID_CASE: | |
7960 | case RID_DEFAULT: | |
7961 | case RID_BREAK: | |
7962 | case RID_CONTINUE: | |
7963 | case RID_RETURN: | |
7964 | case RID_GOTO: | |
7965 | case RID_ASM: | |
7966 | case RID_SIZEOF: | |
7967 | case RID_TYPEOF: | |
7968 | case RID_ALIGNOF: | |
7969 | case RID_UNSIGNED: | |
7970 | case RID_LONG: | |
6388cfe2 | 7971 | case RID_INT128: |
1576dec7 | 7972 | case RID_CONST: |
7973 | case RID_SHORT: | |
7974 | case RID_VOLATILE: | |
7975 | case RID_SIGNED: | |
7976 | case RID_RESTRICT: | |
7977 | case RID_COMPLEX: | |
7978 | case RID_IN: | |
7979 | case RID_OUT: | |
7980 | case RID_INOUT: | |
7981 | case RID_BYCOPY: | |
7982 | case RID_BYREF: | |
7983 | case RID_ONEWAY: | |
7984 | case RID_INT: | |
7985 | case RID_CHAR: | |
7986 | case RID_FLOAT: | |
7987 | case RID_DOUBLE: | |
7988 | case RID_VOID: | |
7989 | case RID_BOOL: | |
7990 | c_parser_consume_token (parser); | |
7991 | return value; | |
7992 | default: | |
7993 | return NULL_TREE; | |
7994 | } | |
7995 | } | |
7996 | ||
7997 | /* Parse an objc-selector-arg. | |
7998 | ||
7999 | objc-selector-arg: | |
8000 | objc-selector | |
8001 | objc-keywordname-list | |
8002 | ||
8003 | objc-keywordname-list: | |
8004 | objc-keywordname | |
8005 | objc-keywordname-list objc-keywordname | |
8006 | ||
8007 | objc-keywordname: | |
8008 | objc-selector : | |
8009 | : | |
8010 | */ | |
8011 | ||
8012 | static tree | |
8013 | c_parser_objc_selector_arg (c_parser *parser) | |
8014 | { | |
8015 | tree sel = c_parser_objc_selector (parser); | |
8016 | tree list = NULL_TREE; | |
8017 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8018 | return sel; | |
8019 | while (true) | |
8020 | { | |
8021 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
8022 | return list; | |
8023 | list = chainon (list, build_tree_list (sel, NULL_TREE)); | |
8024 | sel = c_parser_objc_selector (parser); | |
8025 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8026 | break; | |
8027 | } | |
8028 | return list; | |
8029 | } | |
8030 | ||
8031 | /* Parse an objc-receiver. | |
8032 | ||
8033 | objc-receiver: | |
8034 | expression | |
8035 | class-name | |
8036 | type-name | |
8037 | */ | |
8038 | ||
8039 | static tree | |
8040 | c_parser_objc_receiver (c_parser *parser) | |
8041 | { | |
8042 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
8043 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME | |
8044 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
8045 | { | |
8046 | tree id = c_parser_peek_token (parser)->value; | |
8047 | c_parser_consume_token (parser); | |
8048 | return objc_get_class_reference (id); | |
8049 | } | |
a75b1c71 | 8050 | return c_fully_fold (c_parser_expression (parser).value, false, NULL); |
1576dec7 | 8051 | } |
8052 | ||
8053 | /* Parse objc-message-args. | |
8054 | ||
8055 | objc-message-args: | |
8056 | objc-selector | |
8057 | objc-keywordarg-list | |
8058 | ||
8059 | objc-keywordarg-list: | |
8060 | objc-keywordarg | |
8061 | objc-keywordarg-list objc-keywordarg | |
8062 | ||
8063 | objc-keywordarg: | |
8064 | objc-selector : objc-keywordexpr | |
8065 | : objc-keywordexpr | |
8066 | */ | |
8067 | ||
8068 | static tree | |
8069 | c_parser_objc_message_args (c_parser *parser) | |
8070 | { | |
8071 | tree sel = c_parser_objc_selector (parser); | |
8072 | tree list = NULL_TREE; | |
8073 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8074 | return sel; | |
8075 | while (true) | |
8076 | { | |
8077 | tree keywordexpr; | |
8078 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
61a9d3ca | 8079 | return error_mark_node; |
1576dec7 | 8080 | keywordexpr = c_parser_objc_keywordexpr (parser); |
8081 | list = chainon (list, build_tree_list (sel, keywordexpr)); | |
8082 | sel = c_parser_objc_selector (parser); | |
8083 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8084 | break; | |
8085 | } | |
8086 | return list; | |
8087 | } | |
8088 | ||
8089 | /* Parse an objc-keywordexpr. | |
8090 | ||
8091 | objc-keywordexpr: | |
8092 | nonempty-expr-list | |
8093 | */ | |
8094 | ||
8095 | static tree | |
8096 | c_parser_objc_keywordexpr (c_parser *parser) | |
8097 | { | |
b9c74b4d | 8098 | tree ret; |
8099 | VEC(tree,gc) *expr_list = c_parser_expr_list (parser, true, true, NULL); | |
8100 | if (VEC_length (tree, expr_list) == 1) | |
1576dec7 | 8101 | { |
8102 | /* Just return the expression, remove a level of | |
8103 | indirection. */ | |
b9c74b4d | 8104 | ret = VEC_index (tree, expr_list, 0); |
1576dec7 | 8105 | } |
8106 | else | |
8107 | { | |
8108 | /* We have a comma expression, we will collapse later. */ | |
f352a3fb | 8109 | ret = build_tree_list_vec (expr_list); |
1576dec7 | 8110 | } |
f352a3fb | 8111 | release_tree_vector (expr_list); |
b9c74b4d | 8112 | return ret; |
1576dec7 | 8113 | } |
8114 | ||
a336eb4b | 8115 | /* A check, needed in several places, that ObjC interface, implementation or |
8116 | method definitions are not prefixed by incorrect items. */ | |
8117 | static bool | |
8118 | c_parser_objc_diagnose_bad_element_prefix (c_parser *parser, | |
8119 | struct c_declspecs *specs) | |
8120 | { | |
ae5ead32 | 8121 | if (!specs->declspecs_seen_p || specs->non_sc_seen_p |
8122 | || specs->typespec_kind != ctsk_none) | |
a336eb4b | 8123 | { |
8124 | c_parser_error (parser, | |
8125 | "no type or storage class may be specified here,"); | |
8126 | c_parser_skip_to_end_of_block_or_statement (parser); | |
8127 | return true; | |
8128 | } | |
8129 | return false; | |
8130 | } | |
86c110ac | 8131 | |
1d894bcf | 8132 | /* Parse an Objective-C @property declaration. The syntax is: |
86c110ac | 8133 | |
1d894bcf | 8134 | objc-property-declaration: |
8135 | '@property' objc-property-attributes[opt] struct-declaration ; | |
86c110ac | 8136 | |
1d894bcf | 8137 | objc-property-attributes: |
8138 | '(' objc-property-attribute-list ')' | |
8139 | ||
8140 | objc-property-attribute-list: | |
8141 | objc-property-attribute | |
8142 | objc-property-attribute-list, objc-property-attribute | |
8143 | ||
8144 | objc-property-attribute | |
8145 | 'getter' = identifier | |
8146 | 'setter' = identifier | |
8147 | 'readonly' | |
8148 | 'readwrite' | |
8149 | 'assign' | |
8150 | 'retain' | |
8151 | 'copy' | |
8152 | 'nonatomic' | |
8153 | ||
8154 | For example: | |
8155 | @property NSString *name; | |
8156 | @property (readonly) id object; | |
8157 | @property (retain, nonatomic, getter=getTheName) id name; | |
8158 | @property int a, b, c; | |
8159 | ||
8160 | PS: This function is identical to cp_parser_objc_at_propery_declaration | |
7590f0e5 | 8161 | for C++. Keep them in sync. */ |
86c110ac | 8162 | static void |
1d894bcf | 8163 | c_parser_objc_at_property_declaration (c_parser *parser) |
86c110ac | 8164 | { |
7590f0e5 | 8165 | /* The following variables hold the attributes of the properties as |
8166 | parsed. They are 'false' or 'NULL_TREE' if the attribute was not | |
8167 | seen. When we see an attribute, we set them to 'true' (if they | |
8168 | are boolean properties) or to the identifier (if they have an | |
8169 | argument, ie, for getter and setter). Note that here we only | |
8170 | parse the list of attributes, check the syntax and accumulate the | |
8171 | attributes that we find. objc_add_property_declaration() will | |
8172 | then process the information. */ | |
8173 | bool property_assign = false; | |
8174 | bool property_copy = false; | |
8175 | tree property_getter_ident = NULL_TREE; | |
8176 | bool property_nonatomic = false; | |
8177 | bool property_readonly = false; | |
8178 | bool property_readwrite = false; | |
8179 | bool property_retain = false; | |
8180 | tree property_setter_ident = NULL_TREE; | |
7590f0e5 | 8181 | |
8182 | /* 'properties' is the list of properties that we read. Usually a | |
8183 | single one, but maybe more (eg, in "@property int a, b, c;" there | |
8184 | are three). */ | |
1d894bcf | 8185 | tree properties; |
8186 | location_t loc; | |
7590f0e5 | 8187 | |
1d894bcf | 8188 | loc = c_parser_peek_token (parser)->location; |
8189 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY)); | |
86c110ac | 8190 | |
1d894bcf | 8191 | c_parser_consume_token (parser); /* Eat '@property'. */ |
86c110ac | 8192 | |
1d894bcf | 8193 | /* Parse the optional attribute list... */ |
8194 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
86c110ac | 8195 | { |
1d894bcf | 8196 | /* Eat the '(' */ |
8197 | c_parser_consume_token (parser); | |
8198 | ||
8199 | /* Property attribute keywords are valid now. */ | |
8200 | parser->objc_property_attr_context = true; | |
8201 | ||
8202 | while (true) | |
86c110ac | 8203 | { |
1d894bcf | 8204 | bool syntax_error = false; |
8205 | c_token *token = c_parser_peek_token (parser); | |
8206 | enum rid keyword; | |
8207 | ||
8208 | if (token->type != CPP_KEYWORD) | |
8209 | { | |
8210 | if (token->type == CPP_CLOSE_PAREN) | |
8211 | c_parser_error (parser, "expected identifier"); | |
8212 | else | |
8213 | { | |
8214 | c_parser_consume_token (parser); | |
8215 | c_parser_error (parser, "unknown property attribute"); | |
8216 | } | |
8217 | break; | |
8218 | } | |
8219 | keyword = token->keyword; | |
7590f0e5 | 8220 | c_parser_consume_token (parser); |
1d894bcf | 8221 | switch (keyword) |
8222 | { | |
7590f0e5 | 8223 | case RID_ASSIGN: property_assign = true; break; |
7590f0e5 | 8224 | case RID_COPY: property_copy = true; break; |
8225 | case RID_NONATOMIC: property_nonatomic = true; break; | |
8226 | case RID_READONLY: property_readonly = true; break; | |
8227 | case RID_READWRITE: property_readwrite = true; break; | |
8228 | case RID_RETAIN: property_retain = true; break; | |
8229 | ||
1d894bcf | 8230 | case RID_GETTER: |
8231 | case RID_SETTER: | |
1d894bcf | 8232 | if (c_parser_next_token_is_not (parser, CPP_EQ)) |
8233 | { | |
ffbb3d61 | 8234 | if (keyword == RID_GETTER) |
8235 | c_parser_error (parser, | |
8236 | "missing %<=%> (after %<getter%> attribute)"); | |
8237 | else | |
8238 | c_parser_error (parser, | |
8239 | "missing %<=%> (after %<setter%> attribute)"); | |
1d894bcf | 8240 | syntax_error = true; |
8241 | break; | |
8242 | } | |
8243 | c_parser_consume_token (parser); /* eat the = */ | |
8244 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8245 | { | |
8246 | c_parser_error (parser, "expected identifier"); | |
8247 | syntax_error = true; | |
8248 | break; | |
8249 | } | |
1d894bcf | 8250 | if (keyword == RID_SETTER) |
8251 | { | |
7590f0e5 | 8252 | if (property_setter_ident != NULL_TREE) |
8253 | c_parser_error (parser, "the %<setter%> attribute may only be specified once"); | |
8254 | else | |
8255 | property_setter_ident = c_parser_peek_token (parser)->value; | |
1d894bcf | 8256 | c_parser_consume_token (parser); |
7590f0e5 | 8257 | if (c_parser_next_token_is_not (parser, CPP_COLON)) |
8258 | c_parser_error (parser, "setter name must terminate with %<:%>"); | |
8259 | else | |
8260 | c_parser_consume_token (parser); | |
1d894bcf | 8261 | } |
9d9f5bb3 | 8262 | else |
1d894bcf | 8263 | { |
7590f0e5 | 8264 | if (property_getter_ident != NULL_TREE) |
8265 | c_parser_error (parser, "the %<getter%> attribute may only be specified once"); | |
8266 | else | |
8267 | property_getter_ident = c_parser_peek_token (parser)->value; | |
1d894bcf | 8268 | c_parser_consume_token (parser); |
1d894bcf | 8269 | } |
7590f0e5 | 8270 | break; |
8271 | default: | |
8272 | c_parser_error (parser, "unknown property attribute"); | |
1d894bcf | 8273 | syntax_error = true; |
8274 | break; | |
8275 | } | |
8276 | ||
8277 | if (syntax_error) | |
86c110ac | 8278 | break; |
1d894bcf | 8279 | |
8280 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
86c110ac | 8281 | c_parser_consume_token (parser); |
1d894bcf | 8282 | else |
86c110ac | 8283 | break; |
8284 | } | |
1d894bcf | 8285 | parser->objc_property_attr_context = false; |
8286 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8287 | } | |
8288 | /* ... and the property declaration(s). */ | |
8289 | properties = c_parser_struct_declaration (parser); | |
86c110ac | 8290 | |
1d894bcf | 8291 | if (properties == error_mark_node) |
8292 | { | |
8293 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8294 | parser->error = false; | |
8295 | return; | |
8296 | } | |
86c110ac | 8297 | |
1d894bcf | 8298 | if (properties == NULL_TREE) |
8299 | c_parser_error (parser, "expected identifier"); | |
8300 | else | |
8301 | { | |
8302 | /* Comma-separated properties are chained together in | |
8303 | reverse order; add them one by one. */ | |
8304 | properties = nreverse (properties); | |
8305 | ||
8306 | for (; properties; properties = TREE_CHAIN (properties)) | |
7590f0e5 | 8307 | objc_add_property_declaration (loc, copy_node (properties), |
8308 | property_readonly, property_readwrite, | |
8309 | property_assign, property_retain, | |
8310 | property_copy, property_nonatomic, | |
9d9f5bb3 | 8311 | property_getter_ident, property_setter_ident); |
1d894bcf | 8312 | } |
86c110ac | 8313 | |
8314 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
1d894bcf | 8315 | parser->error = false; |
86c110ac | 8316 | } |
8317 | ||
e1f293c0 | 8318 | /* Parse an Objective-C @synthesize declaration. The syntax is: |
8319 | ||
8320 | objc-synthesize-declaration: | |
8321 | @synthesize objc-synthesize-identifier-list ; | |
8322 | ||
8323 | objc-synthesize-identifier-list: | |
8324 | objc-synthesize-identifier | |
8325 | objc-synthesize-identifier-list, objc-synthesize-identifier | |
8326 | ||
8327 | objc-synthesize-identifier | |
8328 | identifier | |
8329 | identifier = identifier | |
8330 | ||
8331 | For example: | |
8332 | @synthesize MyProperty; | |
8333 | @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty; | |
8334 | ||
8335 | PS: This function is identical to cp_parser_objc_at_synthesize_declaration | |
8336 | for C++. Keep them in sync. | |
8337 | */ | |
8338 | static void | |
8339 | c_parser_objc_at_synthesize_declaration (c_parser *parser) | |
8340 | { | |
8341 | tree list = NULL_TREE; | |
8342 | location_t loc; | |
8343 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNTHESIZE)); | |
8344 | loc = c_parser_peek_token (parser)->location; | |
8345 | ||
8346 | c_parser_consume_token (parser); | |
8347 | while (true) | |
8348 | { | |
8349 | tree property, ivar; | |
8350 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8351 | { | |
8352 | c_parser_error (parser, "expected identifier"); | |
8353 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8354 | /* Once we find the semicolon, we can resume normal parsing. | |
8355 | We have to reset parser->error manually because | |
8356 | c_parser_skip_until_found() won't reset it for us if the | |
8357 | next token is precisely a semicolon. */ | |
8358 | parser->error = false; | |
8359 | return; | |
8360 | } | |
8361 | property = c_parser_peek_token (parser)->value; | |
8362 | c_parser_consume_token (parser); | |
8363 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
8364 | { | |
8365 | c_parser_consume_token (parser); | |
8366 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8367 | { | |
8368 | c_parser_error (parser, "expected identifier"); | |
8369 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8370 | parser->error = false; | |
8371 | return; | |
8372 | } | |
8373 | ivar = c_parser_peek_token (parser)->value; | |
8374 | c_parser_consume_token (parser); | |
8375 | } | |
8376 | else | |
8377 | ivar = NULL_TREE; | |
8378 | list = chainon (list, build_tree_list (ivar, property)); | |
8379 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
8380 | c_parser_consume_token (parser); | |
8381 | else | |
8382 | break; | |
8383 | } | |
8384 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
8385 | objc_add_synthesize_declaration (loc, list); | |
8386 | } | |
8387 | ||
8388 | /* Parse an Objective-C @dynamic declaration. The syntax is: | |
8389 | ||
8390 | objc-dynamic-declaration: | |
8391 | @dynamic identifier-list ; | |
8392 | ||
8393 | For example: | |
8394 | @dynamic MyProperty; | |
8395 | @dynamic MyProperty, AnotherProperty; | |
8396 | ||
8397 | PS: This function is identical to cp_parser_objc_at_dynamic_declaration | |
8398 | for C++. Keep them in sync. | |
8399 | */ | |
8400 | static void | |
8401 | c_parser_objc_at_dynamic_declaration (c_parser *parser) | |
8402 | { | |
8403 | tree list = NULL_TREE; | |
8404 | location_t loc; | |
8405 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_DYNAMIC)); | |
8406 | loc = c_parser_peek_token (parser)->location; | |
8407 | ||
8408 | c_parser_consume_token (parser); | |
8409 | while (true) | |
8410 | { | |
8411 | tree property; | |
8412 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8413 | { | |
8414 | c_parser_error (parser, "expected identifier"); | |
8415 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8416 | parser->error = false; | |
8417 | return; | |
8418 | } | |
8419 | property = c_parser_peek_token (parser)->value; | |
8420 | list = chainon (list, build_tree_list (NULL_TREE, property)); | |
8421 | c_parser_consume_token (parser); | |
8422 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
8423 | c_parser_consume_token (parser); | |
8424 | else | |
8425 | break; | |
8426 | } | |
8427 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
8428 | objc_add_dynamic_declaration (loc, list); | |
8429 | } | |
8430 | ||
1576dec7 | 8431 | \f |
1e8e9920 | 8432 | /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore |
8433 | should be considered, statements. ALLOW_STMT is true if we're within | |
8434 | the context of a function and such pragmas are to be allowed. Returns | |
8435 | true if we actually parsed such a pragma. */ | |
1576dec7 | 8436 | |
b75b98aa | 8437 | static bool |
1e8e9920 | 8438 | c_parser_pragma (c_parser *parser, enum pragma_context context) |
b75b98aa | 8439 | { |
8440 | unsigned int id; | |
8441 | ||
8442 | id = c_parser_peek_token (parser)->pragma_kind; | |
8443 | gcc_assert (id != PRAGMA_NONE); | |
8444 | ||
8445 | switch (id) | |
8446 | { | |
1e8e9920 | 8447 | case PRAGMA_OMP_BARRIER: |
8448 | if (context != pragma_compound) | |
8449 | { | |
8450 | if (context == pragma_stmt) | |
8451 | c_parser_error (parser, "%<#pragma omp barrier%> may only be " | |
8452 | "used in compound statements"); | |
8453 | goto bad_stmt; | |
8454 | } | |
8455 | c_parser_omp_barrier (parser); | |
8456 | return false; | |
8457 | ||
8458 | case PRAGMA_OMP_FLUSH: | |
8459 | if (context != pragma_compound) | |
8460 | { | |
8461 | if (context == pragma_stmt) | |
8462 | c_parser_error (parser, "%<#pragma omp flush%> may only be " | |
8463 | "used in compound statements"); | |
8464 | goto bad_stmt; | |
8465 | } | |
8466 | c_parser_omp_flush (parser); | |
8467 | return false; | |
8468 | ||
fd6481cf | 8469 | case PRAGMA_OMP_TASKWAIT: |
8470 | if (context != pragma_compound) | |
8471 | { | |
8472 | if (context == pragma_stmt) | |
8473 | c_parser_error (parser, "%<#pragma omp taskwait%> may only be " | |
8474 | "used in compound statements"); | |
8475 | goto bad_stmt; | |
8476 | } | |
8477 | c_parser_omp_taskwait (parser); | |
8478 | return false; | |
8479 | ||
2169f33b | 8480 | case PRAGMA_OMP_TASKYIELD: |
8481 | if (context != pragma_compound) | |
8482 | { | |
8483 | if (context == pragma_stmt) | |
8484 | c_parser_error (parser, "%<#pragma omp taskyield%> may only be " | |
8485 | "used in compound statements"); | |
8486 | goto bad_stmt; | |
8487 | } | |
8488 | c_parser_omp_taskyield (parser); | |
8489 | return false; | |
8490 | ||
1e8e9920 | 8491 | case PRAGMA_OMP_THREADPRIVATE: |
8492 | c_parser_omp_threadprivate (parser); | |
8493 | return false; | |
8494 | ||
8495 | case PRAGMA_OMP_SECTION: | |
e3b80d49 | 8496 | error_at (c_parser_peek_token (parser)->location, |
8497 | "%<#pragma omp section%> may only be used in " | |
8498 | "%<#pragma omp sections%> construct"); | |
1e8e9920 | 8499 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); |
8500 | return false; | |
8501 | ||
b75b98aa | 8502 | case PRAGMA_GCC_PCH_PREPROCESS: |
8503 | c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first"); | |
8504 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
8505 | return false; | |
8506 | ||
8507 | default: | |
1e8e9920 | 8508 | if (id < PRAGMA_FIRST_EXTERNAL) |
8509 | { | |
8510 | if (context == pragma_external) | |
8511 | { | |
8512 | bad_stmt: | |
8513 | c_parser_error (parser, "expected declaration specifiers"); | |
8514 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
8515 | return false; | |
8516 | } | |
8517 | c_parser_omp_construct (parser); | |
8518 | return true; | |
8519 | } | |
b75b98aa | 8520 | break; |
8521 | } | |
8522 | ||
8523 | c_parser_consume_pragma (parser); | |
8524 | c_invoke_pragma_handler (id); | |
1576dec7 | 8525 | |
48e1416a | 8526 | /* Skip to EOL, but suppress any error message. Those will have been |
b75b98aa | 8527 | generated by the handler routine through calling error, as opposed |
8528 | to calling c_parser_error. */ | |
8529 | parser->error = true; | |
8530 | c_parser_skip_to_pragma_eol (parser); | |
8531 | ||
8532 | return false; | |
8533 | } | |
8534 | ||
8535 | /* The interface the pragma parsers have to the lexer. */ | |
8536 | ||
8537 | enum cpp_ttype | |
8538 | pragma_lex (tree *value) | |
8539 | { | |
8540 | c_token *tok = c_parser_peek_token (the_parser); | |
8541 | enum cpp_ttype ret = tok->type; | |
8542 | ||
8543 | *value = tok->value; | |
8544 | if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF) | |
8545 | ret = CPP_EOF; | |
8546 | else | |
8547 | { | |
8548 | if (ret == CPP_KEYWORD) | |
8549 | ret = CPP_NAME; | |
8550 | c_parser_consume_token (the_parser); | |
8551 | } | |
8552 | ||
8553 | return ret; | |
8554 | } | |
8555 | ||
8556 | static void | |
8557 | c_parser_pragma_pch_preprocess (c_parser *parser) | |
8558 | { | |
8559 | tree name = NULL; | |
8560 | ||
8561 | c_parser_consume_pragma (parser); | |
8562 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
8563 | { | |
8564 | name = c_parser_peek_token (parser)->value; | |
8565 | c_parser_consume_token (parser); | |
8566 | } | |
8567 | else | |
8568 | c_parser_error (parser, "expected string literal"); | |
8569 | c_parser_skip_to_pragma_eol (parser); | |
8570 | ||
8571 | if (name) | |
8572 | c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name)); | |
8573 | } | |
1e8e9920 | 8574 | \f |
8575 | /* OpenMP 2.5 parsing routines. */ | |
8576 | ||
8577 | /* Returns name of the next clause. | |
8578 | If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and | |
8579 | the token is not consumed. Otherwise appropriate pragma_omp_clause is | |
8580 | returned and the token is consumed. */ | |
8581 | ||
8582 | static pragma_omp_clause | |
8583 | c_parser_omp_clause_name (c_parser *parser) | |
8584 | { | |
8585 | pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE; | |
8586 | ||
8587 | if (c_parser_next_token_is_keyword (parser, RID_IF)) | |
8588 | result = PRAGMA_OMP_CLAUSE_IF; | |
8589 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
8590 | result = PRAGMA_OMP_CLAUSE_DEFAULT; | |
8591 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
8592 | { | |
8593 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8594 | ||
8595 | switch (p[0]) | |
8596 | { | |
8597 | case 'c': | |
fd6481cf | 8598 | if (!strcmp ("collapse", p)) |
8599 | result = PRAGMA_OMP_CLAUSE_COLLAPSE; | |
8600 | else if (!strcmp ("copyin", p)) | |
1e8e9920 | 8601 | result = PRAGMA_OMP_CLAUSE_COPYIN; |
8602 | else if (!strcmp ("copyprivate", p)) | |
8603 | result = PRAGMA_OMP_CLAUSE_COPYPRIVATE; | |
8604 | break; | |
8605 | case 'f': | |
2169f33b | 8606 | if (!strcmp ("final", p)) |
8607 | result = PRAGMA_OMP_CLAUSE_FINAL; | |
8608 | else if (!strcmp ("firstprivate", p)) | |
1e8e9920 | 8609 | result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE; |
8610 | break; | |
8611 | case 'l': | |
8612 | if (!strcmp ("lastprivate", p)) | |
8613 | result = PRAGMA_OMP_CLAUSE_LASTPRIVATE; | |
8614 | break; | |
2169f33b | 8615 | case 'm': |
8616 | if (!strcmp ("mergeable", p)) | |
8617 | result = PRAGMA_OMP_CLAUSE_MERGEABLE; | |
8618 | break; | |
1e8e9920 | 8619 | case 'n': |
8620 | if (!strcmp ("nowait", p)) | |
8621 | result = PRAGMA_OMP_CLAUSE_NOWAIT; | |
8622 | else if (!strcmp ("num_threads", p)) | |
8623 | result = PRAGMA_OMP_CLAUSE_NUM_THREADS; | |
8624 | break; | |
8625 | case 'o': | |
8626 | if (!strcmp ("ordered", p)) | |
8627 | result = PRAGMA_OMP_CLAUSE_ORDERED; | |
8628 | break; | |
8629 | case 'p': | |
8630 | if (!strcmp ("private", p)) | |
8631 | result = PRAGMA_OMP_CLAUSE_PRIVATE; | |
8632 | break; | |
8633 | case 'r': | |
8634 | if (!strcmp ("reduction", p)) | |
8635 | result = PRAGMA_OMP_CLAUSE_REDUCTION; | |
8636 | break; | |
8637 | case 's': | |
8638 | if (!strcmp ("schedule", p)) | |
8639 | result = PRAGMA_OMP_CLAUSE_SCHEDULE; | |
8640 | else if (!strcmp ("shared", p)) | |
8641 | result = PRAGMA_OMP_CLAUSE_SHARED; | |
8642 | break; | |
fd6481cf | 8643 | case 'u': |
8644 | if (!strcmp ("untied", p)) | |
8645 | result = PRAGMA_OMP_CLAUSE_UNTIED; | |
8646 | break; | |
1e8e9920 | 8647 | } |
8648 | } | |
8649 | ||
8650 | if (result != PRAGMA_OMP_CLAUSE_NONE) | |
8651 | c_parser_consume_token (parser); | |
8652 | ||
8653 | return result; | |
8654 | } | |
8655 | ||
8656 | /* Validate that a clause of the given type does not already exist. */ | |
8657 | ||
8658 | static void | |
7d339f93 | 8659 | check_no_duplicate_clause (tree clauses, enum omp_clause_code code, |
8660 | const char *name) | |
1e8e9920 | 8661 | { |
8662 | tree c; | |
8663 | ||
8664 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
55d6e7cd | 8665 | if (OMP_CLAUSE_CODE (c) == code) |
1e8e9920 | 8666 | { |
e60a6f7b | 8667 | location_t loc = OMP_CLAUSE_LOCATION (c); |
8668 | error_at (loc, "too many %qs clauses", name); | |
1e8e9920 | 8669 | break; |
8670 | } | |
8671 | } | |
8672 | ||
8673 | /* OpenMP 2.5: | |
8674 | variable-list: | |
8675 | identifier | |
8676 | variable-list , identifier | |
8677 | ||
e60a6f7b | 8678 | If KIND is nonzero, create the appropriate node and install the |
8679 | decl in OMP_CLAUSE_DECL and add the node to the head of the list. | |
8680 | If KIND is nonzero, CLAUSE_LOC is the location of the clause. | |
1e8e9920 | 8681 | |
8682 | If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE; | |
8683 | return the list created. */ | |
8684 | ||
8685 | static tree | |
e60a6f7b | 8686 | c_parser_omp_variable_list (c_parser *parser, |
8687 | location_t clause_loc, | |
8688 | enum omp_clause_code kind, | |
55d6e7cd | 8689 | tree list) |
1e8e9920 | 8690 | { |
8691 | if (c_parser_next_token_is_not (parser, CPP_NAME) | |
8692 | || c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
8693 | c_parser_error (parser, "expected identifier"); | |
8694 | ||
8695 | while (c_parser_next_token_is (parser, CPP_NAME) | |
8696 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
8697 | { | |
8698 | tree t = lookup_name (c_parser_peek_token (parser)->value); | |
8699 | ||
8700 | if (t == NULL_TREE) | |
e60a6f7b | 8701 | undeclared_variable (c_parser_peek_token (parser)->location, |
8702 | c_parser_peek_token (parser)->value); | |
1e8e9920 | 8703 | else if (t == error_mark_node) |
8704 | ; | |
8705 | else if (kind != 0) | |
8706 | { | |
e60a6f7b | 8707 | tree u = build_omp_clause (clause_loc, kind); |
1e8e9920 | 8708 | OMP_CLAUSE_DECL (u) = t; |
8709 | OMP_CLAUSE_CHAIN (u) = list; | |
8710 | list = u; | |
8711 | } | |
8712 | else | |
8713 | list = tree_cons (t, NULL_TREE, list); | |
8714 | ||
8715 | c_parser_consume_token (parser); | |
8716 | ||
8717 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
8718 | break; | |
8719 | ||
8720 | c_parser_consume_token (parser); | |
8721 | } | |
8722 | ||
8723 | return list; | |
8724 | } | |
8725 | ||
8726 | /* Similarly, but expect leading and trailing parenthesis. This is a very | |
8727 | common case for omp clauses. */ | |
8728 | ||
8729 | static tree | |
7d339f93 | 8730 | c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind, |
8731 | tree list) | |
1e8e9920 | 8732 | { |
e60a6f7b | 8733 | /* The clauses location. */ |
8734 | location_t loc = c_parser_peek_token (parser)->location; | |
8735 | ||
1e8e9920 | 8736 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
8737 | { | |
e60a6f7b | 8738 | list = c_parser_omp_variable_list (parser, loc, kind, list); |
1e8e9920 | 8739 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
8740 | } | |
8741 | return list; | |
8742 | } | |
8743 | ||
fd6481cf | 8744 | /* OpenMP 3.0: |
8745 | collapse ( constant-expression ) */ | |
8746 | ||
8747 | static tree | |
8748 | c_parser_omp_clause_collapse (c_parser *parser, tree list) | |
8749 | { | |
8750 | tree c, num = error_mark_node; | |
8751 | HOST_WIDE_INT n; | |
8752 | location_t loc; | |
8753 | ||
8754 | check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse"); | |
8755 | ||
8756 | loc = c_parser_peek_token (parser)->location; | |
8757 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
8758 | { | |
8759 | num = c_parser_expr_no_commas (parser, NULL).value; | |
8760 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8761 | } | |
8762 | if (num == error_mark_node) | |
8763 | return list; | |
8764 | if (!INTEGRAL_TYPE_P (TREE_TYPE (num)) | |
8765 | || !host_integerp (num, 0) | |
8766 | || (n = tree_low_cst (num, 0)) <= 0 | |
8767 | || (int) n != n) | |
8768 | { | |
e3b80d49 | 8769 | error_at (loc, |
8770 | "collapse argument needs positive constant integer expression"); | |
fd6481cf | 8771 | return list; |
8772 | } | |
e60a6f7b | 8773 | c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE); |
fd6481cf | 8774 | OMP_CLAUSE_COLLAPSE_EXPR (c) = num; |
8775 | OMP_CLAUSE_CHAIN (c) = list; | |
8776 | return c; | |
8777 | } | |
8778 | ||
1e8e9920 | 8779 | /* OpenMP 2.5: |
8780 | copyin ( variable-list ) */ | |
8781 | ||
8782 | static tree | |
8783 | c_parser_omp_clause_copyin (c_parser *parser, tree list) | |
8784 | { | |
8785 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list); | |
8786 | } | |
8787 | ||
8788 | /* OpenMP 2.5: | |
8789 | copyprivate ( variable-list ) */ | |
8790 | ||
8791 | static tree | |
8792 | c_parser_omp_clause_copyprivate (c_parser *parser, tree list) | |
8793 | { | |
8794 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list); | |
8795 | } | |
8796 | ||
8797 | /* OpenMP 2.5: | |
8798 | default ( shared | none ) */ | |
8799 | ||
8800 | static tree | |
8801 | c_parser_omp_clause_default (c_parser *parser, tree list) | |
8802 | { | |
8803 | enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; | |
e60a6f7b | 8804 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 8805 | tree c; |
8806 | ||
8807 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
8808 | return list; | |
8809 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
8810 | { | |
8811 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8812 | ||
8813 | switch (p[0]) | |
8814 | { | |
8815 | case 'n': | |
8816 | if (strcmp ("none", p) != 0) | |
8817 | goto invalid_kind; | |
8818 | kind = OMP_CLAUSE_DEFAULT_NONE; | |
8819 | break; | |
8820 | ||
8821 | case 's': | |
8822 | if (strcmp ("shared", p) != 0) | |
8823 | goto invalid_kind; | |
8824 | kind = OMP_CLAUSE_DEFAULT_SHARED; | |
8825 | break; | |
8826 | ||
8827 | default: | |
8828 | goto invalid_kind; | |
8829 | } | |
8830 | ||
8831 | c_parser_consume_token (parser); | |
8832 | } | |
8833 | else | |
8834 | { | |
8835 | invalid_kind: | |
8836 | c_parser_error (parser, "expected %<none%> or %<shared%>"); | |
8837 | } | |
8838 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8839 | ||
8840 | if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED) | |
8841 | return list; | |
8842 | ||
8843 | check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default"); | |
e60a6f7b | 8844 | c = build_omp_clause (loc, OMP_CLAUSE_DEFAULT); |
1e8e9920 | 8845 | OMP_CLAUSE_CHAIN (c) = list; |
8846 | OMP_CLAUSE_DEFAULT_KIND (c) = kind; | |
8847 | ||
8848 | return c; | |
8849 | } | |
8850 | ||
8851 | /* OpenMP 2.5: | |
8852 | firstprivate ( variable-list ) */ | |
8853 | ||
8854 | static tree | |
8855 | c_parser_omp_clause_firstprivate (c_parser *parser, tree list) | |
8856 | { | |
8857 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list); | |
8858 | } | |
8859 | ||
2169f33b | 8860 | /* OpenMP 3.1: |
8861 | final ( expression ) */ | |
8862 | ||
8863 | static tree | |
8864 | c_parser_omp_clause_final (c_parser *parser, tree list) | |
8865 | { | |
8866 | location_t loc = c_parser_peek_token (parser)->location; | |
8867 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
8868 | { | |
8869 | tree t = c_parser_paren_condition (parser); | |
8870 | tree c; | |
8871 | ||
8872 | check_no_duplicate_clause (list, OMP_CLAUSE_FINAL, "final"); | |
8873 | ||
8874 | c = build_omp_clause (loc, OMP_CLAUSE_FINAL); | |
8875 | OMP_CLAUSE_FINAL_EXPR (c) = t; | |
8876 | OMP_CLAUSE_CHAIN (c) = list; | |
8877 | list = c; | |
8878 | } | |
8879 | else | |
8880 | c_parser_error (parser, "expected %<(%>"); | |
8881 | ||
8882 | return list; | |
8883 | } | |
8884 | ||
1e8e9920 | 8885 | /* OpenMP 2.5: |
8886 | if ( expression ) */ | |
8887 | ||
8888 | static tree | |
8889 | c_parser_omp_clause_if (c_parser *parser, tree list) | |
8890 | { | |
e60a6f7b | 8891 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 8892 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
8893 | { | |
8894 | tree t = c_parser_paren_condition (parser); | |
8895 | tree c; | |
8896 | ||
8897 | check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if"); | |
8898 | ||
e60a6f7b | 8899 | c = build_omp_clause (loc, OMP_CLAUSE_IF); |
1e8e9920 | 8900 | OMP_CLAUSE_IF_EXPR (c) = t; |
8901 | OMP_CLAUSE_CHAIN (c) = list; | |
8902 | list = c; | |
8903 | } | |
8904 | else | |
8905 | c_parser_error (parser, "expected %<(%>"); | |
8906 | ||
8907 | return list; | |
8908 | } | |
8909 | ||
8910 | /* OpenMP 2.5: | |
8911 | lastprivate ( variable-list ) */ | |
8912 | ||
8913 | static tree | |
8914 | c_parser_omp_clause_lastprivate (c_parser *parser, tree list) | |
8915 | { | |
8916 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list); | |
8917 | } | |
8918 | ||
2169f33b | 8919 | /* OpenMP 3.1: |
8920 | mergeable */ | |
8921 | ||
8922 | static tree | |
8923 | c_parser_omp_clause_mergeable (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
8924 | { | |
8925 | tree c; | |
8926 | ||
8927 | /* FIXME: Should we allow duplicates? */ | |
8928 | check_no_duplicate_clause (list, OMP_CLAUSE_MERGEABLE, "mergeable"); | |
8929 | ||
8930 | c = build_omp_clause (c_parser_peek_token (parser)->location, | |
8931 | OMP_CLAUSE_MERGEABLE); | |
8932 | OMP_CLAUSE_CHAIN (c) = list; | |
8933 | ||
8934 | return c; | |
8935 | } | |
8936 | ||
1e8e9920 | 8937 | /* OpenMP 2.5: |
8938 | nowait */ | |
8939 | ||
8940 | static tree | |
8941 | c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
8942 | { | |
8943 | tree c; | |
e60a6f7b | 8944 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 8945 | |
8946 | check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait"); | |
8947 | ||
e60a6f7b | 8948 | c = build_omp_clause (loc, OMP_CLAUSE_NOWAIT); |
1e8e9920 | 8949 | OMP_CLAUSE_CHAIN (c) = list; |
8950 | return c; | |
8951 | } | |
8952 | ||
8953 | /* OpenMP 2.5: | |
8954 | num_threads ( expression ) */ | |
8955 | ||
8956 | static tree | |
8957 | c_parser_omp_clause_num_threads (c_parser *parser, tree list) | |
8958 | { | |
e60a6f7b | 8959 | location_t num_threads_loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 8960 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
8961 | { | |
be9eba16 | 8962 | location_t expr_loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 8963 | tree c, t = c_parser_expression (parser).value; |
a75b1c71 | 8964 | t = c_fully_fold (t, false, NULL); |
1e8e9920 | 8965 | |
8966 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8967 | ||
8968 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
8969 | { | |
8970 | c_parser_error (parser, "expected integer expression"); | |
8971 | return list; | |
8972 | } | |
8973 | ||
8974 | /* Attempt to statically determine when the number isn't positive. */ | |
389dd41b | 8975 | c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t, |
1e8e9920 | 8976 | build_int_cst (TREE_TYPE (t), 0)); |
e60a6f7b | 8977 | if (CAN_HAVE_LOCATION_P (c)) |
8978 | SET_EXPR_LOCATION (c, expr_loc); | |
1e8e9920 | 8979 | if (c == boolean_true_node) |
8980 | { | |
e3b80d49 | 8981 | warning_at (expr_loc, 0, |
8982 | "%<num_threads%> value must be positive"); | |
1e8e9920 | 8983 | t = integer_one_node; |
8984 | } | |
8985 | ||
8986 | check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads"); | |
8987 | ||
e60a6f7b | 8988 | c = build_omp_clause (num_threads_loc, OMP_CLAUSE_NUM_THREADS); |
1e8e9920 | 8989 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; |
8990 | OMP_CLAUSE_CHAIN (c) = list; | |
8991 | list = c; | |
8992 | } | |
8993 | ||
8994 | return list; | |
8995 | } | |
8996 | ||
8997 | /* OpenMP 2.5: | |
8998 | ordered */ | |
8999 | ||
9000 | static tree | |
e60a6f7b | 9001 | c_parser_omp_clause_ordered (c_parser *parser, tree list) |
1e8e9920 | 9002 | { |
9003 | tree c; | |
9004 | ||
9005 | check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered"); | |
9006 | ||
e60a6f7b | 9007 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
9008 | OMP_CLAUSE_ORDERED); | |
1e8e9920 | 9009 | OMP_CLAUSE_CHAIN (c) = list; |
e60a6f7b | 9010 | |
1e8e9920 | 9011 | return c; |
9012 | } | |
9013 | ||
9014 | /* OpenMP 2.5: | |
9015 | private ( variable-list ) */ | |
9016 | ||
9017 | static tree | |
9018 | c_parser_omp_clause_private (c_parser *parser, tree list) | |
9019 | { | |
9020 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list); | |
9021 | } | |
9022 | ||
9023 | /* OpenMP 2.5: | |
9024 | reduction ( reduction-operator : variable-list ) | |
9025 | ||
9026 | reduction-operator: | |
2169f33b | 9027 | One of: + * - & ^ | && || |
9028 | ||
9029 | OpenMP 3.1: | |
9030 | ||
9031 | reduction-operator: | |
9032 | One of: + * - & ^ | && || max min */ | |
1e8e9920 | 9033 | |
9034 | static tree | |
9035 | c_parser_omp_clause_reduction (c_parser *parser, tree list) | |
9036 | { | |
e60a6f7b | 9037 | location_t clause_loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 9038 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
9039 | { | |
9040 | enum tree_code code; | |
9041 | ||
9042 | switch (c_parser_peek_token (parser)->type) | |
9043 | { | |
9044 | case CPP_PLUS: | |
9045 | code = PLUS_EXPR; | |
9046 | break; | |
9047 | case CPP_MULT: | |
9048 | code = MULT_EXPR; | |
9049 | break; | |
9050 | case CPP_MINUS: | |
9051 | code = MINUS_EXPR; | |
9052 | break; | |
9053 | case CPP_AND: | |
9054 | code = BIT_AND_EXPR; | |
9055 | break; | |
9056 | case CPP_XOR: | |
9057 | code = BIT_XOR_EXPR; | |
9058 | break; | |
9059 | case CPP_OR: | |
9060 | code = BIT_IOR_EXPR; | |
9061 | break; | |
9062 | case CPP_AND_AND: | |
9063 | code = TRUTH_ANDIF_EXPR; | |
9064 | break; | |
9065 | case CPP_OR_OR: | |
9066 | code = TRUTH_ORIF_EXPR; | |
9067 | break; | |
2169f33b | 9068 | case CPP_NAME: |
9069 | { | |
9070 | const char *p | |
9071 | = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
9072 | if (strcmp (p, "min") == 0) | |
9073 | { | |
9074 | code = MIN_EXPR; | |
9075 | break; | |
9076 | } | |
9077 | if (strcmp (p, "max") == 0) | |
9078 | { | |
9079 | code = MAX_EXPR; | |
9080 | break; | |
9081 | } | |
9082 | } | |
9083 | /* FALLTHRU */ | |
1e8e9920 | 9084 | default: |
9085 | c_parser_error (parser, | |
9086 | "expected %<+%>, %<*%>, %<-%>, %<&%>, " | |
2169f33b | 9087 | "%<^%>, %<|%>, %<&&%>, %<||%>, %<min%> or %<max%>"); |
1e8e9920 | 9088 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); |
9089 | return list; | |
9090 | } | |
9091 | c_parser_consume_token (parser); | |
9092 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
9093 | { | |
9094 | tree nl, c; | |
9095 | ||
e60a6f7b | 9096 | nl = c_parser_omp_variable_list (parser, clause_loc, |
9097 | OMP_CLAUSE_REDUCTION, list); | |
1e8e9920 | 9098 | for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c)) |
9099 | OMP_CLAUSE_REDUCTION_CODE (c) = code; | |
9100 | ||
9101 | list = nl; | |
9102 | } | |
9103 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9104 | } | |
9105 | return list; | |
9106 | } | |
9107 | ||
9108 | /* OpenMP 2.5: | |
9109 | schedule ( schedule-kind ) | |
9110 | schedule ( schedule-kind , expression ) | |
9111 | ||
9112 | schedule-kind: | |
fd6481cf | 9113 | static | dynamic | guided | runtime | auto |
1e8e9920 | 9114 | */ |
9115 | ||
9116 | static tree | |
9117 | c_parser_omp_clause_schedule (c_parser *parser, tree list) | |
9118 | { | |
9119 | tree c, t; | |
e60a6f7b | 9120 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 9121 | |
9122 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
9123 | return list; | |
9124 | ||
e60a6f7b | 9125 | c = build_omp_clause (loc, OMP_CLAUSE_SCHEDULE); |
1e8e9920 | 9126 | |
9127 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
9128 | { | |
9129 | tree kind = c_parser_peek_token (parser)->value; | |
9130 | const char *p = IDENTIFIER_POINTER (kind); | |
9131 | ||
9132 | switch (p[0]) | |
9133 | { | |
9134 | case 'd': | |
9135 | if (strcmp ("dynamic", p) != 0) | |
9136 | goto invalid_kind; | |
9137 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC; | |
9138 | break; | |
9139 | ||
9140 | case 'g': | |
9141 | if (strcmp ("guided", p) != 0) | |
9142 | goto invalid_kind; | |
9143 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED; | |
9144 | break; | |
9145 | ||
9146 | case 'r': | |
9147 | if (strcmp ("runtime", p) != 0) | |
9148 | goto invalid_kind; | |
9149 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME; | |
9150 | break; | |
9151 | ||
9152 | default: | |
9153 | goto invalid_kind; | |
9154 | } | |
9155 | } | |
9156 | else if (c_parser_next_token_is_keyword (parser, RID_STATIC)) | |
9157 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC; | |
fd6481cf | 9158 | else if (c_parser_next_token_is_keyword (parser, RID_AUTO)) |
9159 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO; | |
1e8e9920 | 9160 | else |
9161 | goto invalid_kind; | |
9162 | ||
9163 | c_parser_consume_token (parser); | |
9164 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
9165 | { | |
be9eba16 | 9166 | location_t here; |
1e8e9920 | 9167 | c_parser_consume_token (parser); |
9168 | ||
be9eba16 | 9169 | here = c_parser_peek_token (parser)->location; |
1e8e9920 | 9170 | t = c_parser_expr_no_commas (parser, NULL).value; |
a75b1c71 | 9171 | t = c_fully_fold (t, false, NULL); |
1e8e9920 | 9172 | |
9173 | if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME) | |
e3b80d49 | 9174 | error_at (here, "schedule %<runtime%> does not take " |
9175 | "a %<chunk_size%> parameter"); | |
fd6481cf | 9176 | else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO) |
e3b80d49 | 9177 | error_at (here, |
9178 | "schedule %<auto%> does not take " | |
9179 | "a %<chunk_size%> parameter"); | |
1e8e9920 | 9180 | else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE) |
9181 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
9182 | else | |
9183 | c_parser_error (parser, "expected integer expression"); | |
9184 | ||
9185 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9186 | } | |
9187 | else | |
9188 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
9189 | "expected %<,%> or %<)%>"); | |
9190 | ||
9191 | check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule"); | |
9192 | OMP_CLAUSE_CHAIN (c) = list; | |
9193 | return c; | |
9194 | ||
9195 | invalid_kind: | |
9196 | c_parser_error (parser, "invalid schedule kind"); | |
9197 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
9198 | return list; | |
9199 | } | |
9200 | ||
9201 | /* OpenMP 2.5: | |
9202 | shared ( variable-list ) */ | |
9203 | ||
9204 | static tree | |
9205 | c_parser_omp_clause_shared (c_parser *parser, tree list) | |
9206 | { | |
9207 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list); | |
9208 | } | |
9209 | ||
fd6481cf | 9210 | /* OpenMP 3.0: |
9211 | untied */ | |
9212 | ||
9213 | static tree | |
9214 | c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
9215 | { | |
9216 | tree c; | |
9217 | ||
9218 | /* FIXME: Should we allow duplicates? */ | |
9219 | check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied"); | |
9220 | ||
e60a6f7b | 9221 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
9222 | OMP_CLAUSE_UNTIED); | |
fd6481cf | 9223 | OMP_CLAUSE_CHAIN (c) = list; |
e60a6f7b | 9224 | |
fd6481cf | 9225 | return c; |
9226 | } | |
9227 | ||
1e8e9920 | 9228 | /* Parse all OpenMP clauses. The set clauses allowed by the directive |
9229 | is a bitmask in MASK. Return the list of clauses found; the result | |
9230 | of clause default goes in *pdefault. */ | |
9231 | ||
9232 | static tree | |
9233 | c_parser_omp_all_clauses (c_parser *parser, unsigned int mask, | |
9234 | const char *where) | |
9235 | { | |
9236 | tree clauses = NULL; | |
77c8bed2 | 9237 | bool first = true; |
1e8e9920 | 9238 | |
9239 | while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
9240 | { | |
77c8bed2 | 9241 | location_t here; |
9242 | pragma_omp_clause c_kind; | |
1e8e9920 | 9243 | const char *c_name; |
9244 | tree prev = clauses; | |
9245 | ||
77c8bed2 | 9246 | if (!first && c_parser_next_token_is (parser, CPP_COMMA)) |
9247 | c_parser_consume_token (parser); | |
9248 | ||
9249 | first = false; | |
9250 | here = c_parser_peek_token (parser)->location; | |
9251 | c_kind = c_parser_omp_clause_name (parser); | |
9252 | ||
1e8e9920 | 9253 | switch (c_kind) |
9254 | { | |
fd6481cf | 9255 | case PRAGMA_OMP_CLAUSE_COLLAPSE: |
9256 | clauses = c_parser_omp_clause_collapse (parser, clauses); | |
9257 | c_name = "collapse"; | |
9258 | break; | |
1e8e9920 | 9259 | case PRAGMA_OMP_CLAUSE_COPYIN: |
9260 | clauses = c_parser_omp_clause_copyin (parser, clauses); | |
9261 | c_name = "copyin"; | |
9262 | break; | |
9263 | case PRAGMA_OMP_CLAUSE_COPYPRIVATE: | |
9264 | clauses = c_parser_omp_clause_copyprivate (parser, clauses); | |
9265 | c_name = "copyprivate"; | |
9266 | break; | |
9267 | case PRAGMA_OMP_CLAUSE_DEFAULT: | |
9268 | clauses = c_parser_omp_clause_default (parser, clauses); | |
9269 | c_name = "default"; | |
9270 | break; | |
9271 | case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE: | |
9272 | clauses = c_parser_omp_clause_firstprivate (parser, clauses); | |
9273 | c_name = "firstprivate"; | |
9274 | break; | |
2169f33b | 9275 | case PRAGMA_OMP_CLAUSE_FINAL: |
9276 | clauses = c_parser_omp_clause_final (parser, clauses); | |
9277 | c_name = "final"; | |
9278 | break; | |
1e8e9920 | 9279 | case PRAGMA_OMP_CLAUSE_IF: |
9280 | clauses = c_parser_omp_clause_if (parser, clauses); | |
9281 | c_name = "if"; | |
9282 | break; | |
9283 | case PRAGMA_OMP_CLAUSE_LASTPRIVATE: | |
9284 | clauses = c_parser_omp_clause_lastprivate (parser, clauses); | |
9285 | c_name = "lastprivate"; | |
9286 | break; | |
2169f33b | 9287 | case PRAGMA_OMP_CLAUSE_MERGEABLE: |
9288 | clauses = c_parser_omp_clause_mergeable (parser, clauses); | |
9289 | c_name = "mergeable"; | |
9290 | break; | |
1e8e9920 | 9291 | case PRAGMA_OMP_CLAUSE_NOWAIT: |
9292 | clauses = c_parser_omp_clause_nowait (parser, clauses); | |
9293 | c_name = "nowait"; | |
9294 | break; | |
9295 | case PRAGMA_OMP_CLAUSE_NUM_THREADS: | |
9296 | clauses = c_parser_omp_clause_num_threads (parser, clauses); | |
9297 | c_name = "num_threads"; | |
9298 | break; | |
9299 | case PRAGMA_OMP_CLAUSE_ORDERED: | |
9300 | clauses = c_parser_omp_clause_ordered (parser, clauses); | |
9301 | c_name = "ordered"; | |
9302 | break; | |
9303 | case PRAGMA_OMP_CLAUSE_PRIVATE: | |
9304 | clauses = c_parser_omp_clause_private (parser, clauses); | |
9305 | c_name = "private"; | |
9306 | break; | |
9307 | case PRAGMA_OMP_CLAUSE_REDUCTION: | |
9308 | clauses = c_parser_omp_clause_reduction (parser, clauses); | |
9309 | c_name = "reduction"; | |
9310 | break; | |
9311 | case PRAGMA_OMP_CLAUSE_SCHEDULE: | |
9312 | clauses = c_parser_omp_clause_schedule (parser, clauses); | |
9313 | c_name = "schedule"; | |
9314 | break; | |
9315 | case PRAGMA_OMP_CLAUSE_SHARED: | |
9316 | clauses = c_parser_omp_clause_shared (parser, clauses); | |
9317 | c_name = "shared"; | |
9318 | break; | |
fd6481cf | 9319 | case PRAGMA_OMP_CLAUSE_UNTIED: |
9320 | clauses = c_parser_omp_clause_untied (parser, clauses); | |
9321 | c_name = "untied"; | |
9322 | break; | |
1e8e9920 | 9323 | default: |
9324 | c_parser_error (parser, "expected %<#pragma omp%> clause"); | |
9325 | goto saw_error; | |
9326 | } | |
9327 | ||
9328 | if (((mask >> c_kind) & 1) == 0 && !parser->error) | |
9329 | { | |
9330 | /* Remove the invalid clause(s) from the list to avoid | |
9331 | confusing the rest of the compiler. */ | |
9332 | clauses = prev; | |
e3b80d49 | 9333 | error_at (here, "%qs is not valid for %qs", c_name, where); |
1e8e9920 | 9334 | } |
9335 | } | |
9336 | ||
9337 | saw_error: | |
9338 | c_parser_skip_to_pragma_eol (parser); | |
9339 | ||
9340 | return c_finish_omp_clauses (clauses); | |
9341 | } | |
9342 | ||
9343 | /* OpenMP 2.5: | |
9344 | structured-block: | |
9345 | statement | |
9346 | ||
9347 | In practice, we're also interested in adding the statement to an | |
9348 | outer node. So it is convenient if we work around the fact that | |
9349 | c_parser_statement calls add_stmt. */ | |
9350 | ||
9351 | static tree | |
9352 | c_parser_omp_structured_block (c_parser *parser) | |
9353 | { | |
9354 | tree stmt = push_stmt_list (); | |
9355 | c_parser_statement (parser); | |
9356 | return pop_stmt_list (stmt); | |
9357 | } | |
9358 | ||
9359 | /* OpenMP 2.5: | |
9360 | # pragma omp atomic new-line | |
9361 | expression-stmt | |
9362 | ||
9363 | expression-stmt: | |
9364 | x binop= expr | x++ | ++x | x-- | --x | |
9365 | binop: | |
9366 | +, *, -, /, &, ^, |, <<, >> | |
9367 | ||
48e1416a | 9368 | where x is an lvalue expression with scalar type. |
e60a6f7b | 9369 | |
2169f33b | 9370 | OpenMP 3.1: |
9371 | # pragma omp atomic new-line | |
9372 | update-stmt | |
9373 | ||
9374 | # pragma omp atomic read new-line | |
9375 | read-stmt | |
9376 | ||
9377 | # pragma omp atomic write new-line | |
9378 | write-stmt | |
9379 | ||
9380 | # pragma omp atomic update new-line | |
9381 | update-stmt | |
9382 | ||
9383 | # pragma omp atomic capture new-line | |
9384 | capture-stmt | |
9385 | ||
9386 | # pragma omp atomic capture new-line | |
9387 | capture-block | |
9388 | ||
9389 | read-stmt: | |
9390 | v = x | |
9391 | write-stmt: | |
9392 | x = expr | |
9393 | update-stmt: | |
9394 | expression-stmt | x = x binop expr | |
9395 | capture-stmt: | |
9396 | v = x binop= expr | v = x++ | v = ++x | v = x-- | v = --x | |
9397 | capture-block: | |
9398 | { v = x; update-stmt; } | { update-stmt; v = x; } | |
9399 | ||
9400 | where x and v are lvalue expressions with scalar type. | |
9401 | ||
e60a6f7b | 9402 | LOC is the location of the #pragma token. */ |
1e8e9920 | 9403 | |
9404 | static void | |
e60a6f7b | 9405 | c_parser_omp_atomic (location_t loc, c_parser *parser) |
1e8e9920 | 9406 | { |
2169f33b | 9407 | tree lhs = NULL_TREE, rhs = NULL_TREE, v = NULL_TREE; |
9408 | tree lhs1 = NULL_TREE, rhs1 = NULL_TREE; | |
9409 | tree stmt, orig_lhs; | |
9410 | enum tree_code code = OMP_ATOMIC, opcode = NOP_EXPR; | |
3cc31756 | 9411 | struct c_expr rhs_expr; |
2169f33b | 9412 | bool structured_block = false; |
1e8e9920 | 9413 | |
2169f33b | 9414 | if (c_parser_next_token_is (parser, CPP_NAME)) |
9415 | { | |
9416 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
9417 | ||
9418 | if (!strcmp (p, "read")) | |
9419 | code = OMP_ATOMIC_READ; | |
9420 | else if (!strcmp (p, "write")) | |
9421 | code = NOP_EXPR; | |
9422 | else if (!strcmp (p, "update")) | |
9423 | code = OMP_ATOMIC; | |
9424 | else if (!strcmp (p, "capture")) | |
9425 | code = OMP_ATOMIC_CAPTURE_NEW; | |
9426 | else | |
9427 | p = NULL; | |
9428 | if (p) | |
9429 | c_parser_consume_token (parser); | |
9430 | } | |
1e8e9920 | 9431 | c_parser_skip_to_pragma_eol (parser); |
9432 | ||
2169f33b | 9433 | switch (code) |
9434 | { | |
9435 | case OMP_ATOMIC_READ: | |
9436 | case NOP_EXPR: /* atomic write */ | |
9437 | v = c_parser_unary_expression (parser).value; | |
9438 | v = c_fully_fold (v, false, NULL); | |
9439 | if (v == error_mark_node) | |
9440 | goto saw_error; | |
9441 | loc = c_parser_peek_token (parser)->location; | |
9442 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9443 | goto saw_error; | |
9444 | if (code == NOP_EXPR) | |
9445 | lhs = c_parser_expression (parser).value; | |
9446 | else | |
9447 | lhs = c_parser_unary_expression (parser).value; | |
9448 | lhs = c_fully_fold (lhs, false, NULL); | |
9449 | if (lhs == error_mark_node) | |
9450 | goto saw_error; | |
9451 | if (code == NOP_EXPR) | |
9452 | { | |
9453 | /* atomic write is represented by OMP_ATOMIC with NOP_EXPR | |
9454 | opcode. */ | |
9455 | code = OMP_ATOMIC; | |
9456 | rhs = lhs; | |
9457 | lhs = v; | |
9458 | v = NULL_TREE; | |
9459 | } | |
9460 | goto done; | |
9461 | case OMP_ATOMIC_CAPTURE_NEW: | |
9462 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
9463 | { | |
9464 | c_parser_consume_token (parser); | |
9465 | structured_block = true; | |
9466 | } | |
9467 | else | |
9468 | { | |
9469 | v = c_parser_unary_expression (parser).value; | |
9470 | v = c_fully_fold (v, false, NULL); | |
9471 | if (v == error_mark_node) | |
9472 | goto saw_error; | |
9473 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9474 | goto saw_error; | |
9475 | } | |
9476 | break; | |
9477 | default: | |
9478 | break; | |
9479 | } | |
9480 | ||
9481 | /* For structured_block case we don't know yet whether | |
9482 | old or new x should be captured. */ | |
9483 | restart: | |
1e8e9920 | 9484 | lhs = c_parser_unary_expression (parser).value; |
a75b1c71 | 9485 | lhs = c_fully_fold (lhs, false, NULL); |
2169f33b | 9486 | orig_lhs = lhs; |
1e8e9920 | 9487 | switch (TREE_CODE (lhs)) |
9488 | { | |
9489 | case ERROR_MARK: | |
9490 | saw_error: | |
9491 | c_parser_skip_to_end_of_block_or_statement (parser); | |
2169f33b | 9492 | if (structured_block) |
9493 | { | |
9494 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
9495 | c_parser_consume_token (parser); | |
9496 | else if (code == OMP_ATOMIC_CAPTURE_NEW) | |
9497 | { | |
9498 | c_parser_skip_to_end_of_block_or_statement (parser); | |
9499 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
9500 | c_parser_consume_token (parser); | |
9501 | } | |
9502 | } | |
1e8e9920 | 9503 | return; |
9504 | ||
1e8e9920 | 9505 | case POSTINCREMENT_EXPR: |
2169f33b | 9506 | if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block) |
9507 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9508 | /* FALLTHROUGH */ | |
9509 | case PREINCREMENT_EXPR: | |
1e8e9920 | 9510 | lhs = TREE_OPERAND (lhs, 0); |
2169f33b | 9511 | opcode = PLUS_EXPR; |
1e8e9920 | 9512 | rhs = integer_one_node; |
9513 | break; | |
9514 | ||
1e8e9920 | 9515 | case POSTDECREMENT_EXPR: |
2169f33b | 9516 | if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block) |
9517 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9518 | /* FALLTHROUGH */ | |
9519 | case PREDECREMENT_EXPR: | |
1e8e9920 | 9520 | lhs = TREE_OPERAND (lhs, 0); |
2169f33b | 9521 | opcode = MINUS_EXPR; |
1e8e9920 | 9522 | rhs = integer_one_node; |
9523 | break; | |
9524 | ||
db28a91b | 9525 | case COMPOUND_EXPR: |
9526 | if (TREE_CODE (TREE_OPERAND (lhs, 0)) == SAVE_EXPR | |
9527 | && TREE_CODE (TREE_OPERAND (lhs, 1)) == COMPOUND_EXPR | |
9528 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) == MODIFY_EXPR | |
9529 | && TREE_OPERAND (TREE_OPERAND (lhs, 1), 1) == TREE_OPERAND (lhs, 0) | |
9530 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND | |
9531 | (TREE_OPERAND (lhs, 1), 0), 0))) | |
9532 | == BOOLEAN_TYPE) | |
9533 | /* Undo effects of boolean_increment for post {in,de}crement. */ | |
9534 | lhs = TREE_OPERAND (TREE_OPERAND (lhs, 1), 0); | |
9535 | /* FALLTHRU */ | |
9536 | case MODIFY_EXPR: | |
9537 | if (TREE_CODE (lhs) == MODIFY_EXPR | |
9538 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs, 0))) == BOOLEAN_TYPE) | |
9539 | { | |
9540 | /* Undo effects of boolean_increment. */ | |
9541 | if (integer_onep (TREE_OPERAND (lhs, 1))) | |
9542 | { | |
9543 | /* This is pre or post increment. */ | |
9544 | rhs = TREE_OPERAND (lhs, 1); | |
9545 | lhs = TREE_OPERAND (lhs, 0); | |
2169f33b | 9546 | opcode = NOP_EXPR; |
9547 | if (code == OMP_ATOMIC_CAPTURE_NEW | |
9548 | && !structured_block | |
9549 | && TREE_CODE (orig_lhs) == COMPOUND_EXPR) | |
9550 | code = OMP_ATOMIC_CAPTURE_OLD; | |
db28a91b | 9551 | break; |
9552 | } | |
9553 | if (TREE_CODE (TREE_OPERAND (lhs, 1)) == TRUTH_NOT_EXPR | |
9554 | && TREE_OPERAND (lhs, 0) | |
9555 | == TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) | |
9556 | { | |
9557 | /* This is pre or post decrement. */ | |
9558 | rhs = TREE_OPERAND (lhs, 1); | |
9559 | lhs = TREE_OPERAND (lhs, 0); | |
2169f33b | 9560 | opcode = NOP_EXPR; |
9561 | if (code == OMP_ATOMIC_CAPTURE_NEW | |
9562 | && !structured_block | |
9563 | && TREE_CODE (orig_lhs) == COMPOUND_EXPR) | |
9564 | code = OMP_ATOMIC_CAPTURE_OLD; | |
db28a91b | 9565 | break; |
9566 | } | |
9567 | } | |
9568 | /* FALLTHRU */ | |
1e8e9920 | 9569 | default: |
9570 | switch (c_parser_peek_token (parser)->type) | |
9571 | { | |
9572 | case CPP_MULT_EQ: | |
2169f33b | 9573 | opcode = MULT_EXPR; |
1e8e9920 | 9574 | break; |
9575 | case CPP_DIV_EQ: | |
2169f33b | 9576 | opcode = TRUNC_DIV_EXPR; |
1e8e9920 | 9577 | break; |
9578 | case CPP_PLUS_EQ: | |
2169f33b | 9579 | opcode = PLUS_EXPR; |
1e8e9920 | 9580 | break; |
9581 | case CPP_MINUS_EQ: | |
2169f33b | 9582 | opcode = MINUS_EXPR; |
1e8e9920 | 9583 | break; |
9584 | case CPP_LSHIFT_EQ: | |
2169f33b | 9585 | opcode = LSHIFT_EXPR; |
1e8e9920 | 9586 | break; |
9587 | case CPP_RSHIFT_EQ: | |
2169f33b | 9588 | opcode = RSHIFT_EXPR; |
1e8e9920 | 9589 | break; |
9590 | case CPP_AND_EQ: | |
2169f33b | 9591 | opcode = BIT_AND_EXPR; |
1e8e9920 | 9592 | break; |
9593 | case CPP_OR_EQ: | |
2169f33b | 9594 | opcode = BIT_IOR_EXPR; |
1e8e9920 | 9595 | break; |
9596 | case CPP_XOR_EQ: | |
2169f33b | 9597 | opcode = BIT_XOR_EXPR; |
1e8e9920 | 9598 | break; |
2169f33b | 9599 | case CPP_EQ: |
9600 | if (structured_block || code == OMP_ATOMIC) | |
9601 | { | |
9602 | location_t aloc = c_parser_peek_token (parser)->location; | |
9603 | location_t rhs_loc; | |
9604 | enum c_parser_prec oprec = PREC_NONE; | |
9605 | ||
9606 | c_parser_consume_token (parser); | |
9607 | rhs1 = c_parser_unary_expression (parser).value; | |
9608 | rhs1 = c_fully_fold (rhs1, false, NULL); | |
9609 | if (rhs1 == error_mark_node) | |
9610 | goto saw_error; | |
9611 | switch (c_parser_peek_token (parser)->type) | |
9612 | { | |
9613 | case CPP_SEMICOLON: | |
9614 | if (code == OMP_ATOMIC_CAPTURE_NEW) | |
9615 | { | |
9616 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9617 | v = lhs; | |
9618 | lhs = NULL_TREE; | |
9619 | lhs1 = rhs1; | |
9620 | rhs1 = NULL_TREE; | |
9621 | c_parser_consume_token (parser); | |
9622 | goto restart; | |
9623 | } | |
9624 | c_parser_error (parser, | |
9625 | "invalid form of %<#pragma omp atomic%>"); | |
9626 | goto saw_error; | |
9627 | case CPP_MULT: | |
9628 | opcode = MULT_EXPR; | |
9629 | oprec = PREC_MULT; | |
9630 | break; | |
9631 | case CPP_DIV: | |
9632 | opcode = TRUNC_DIV_EXPR; | |
9633 | oprec = PREC_MULT; | |
9634 | break; | |
9635 | case CPP_PLUS: | |
9636 | opcode = PLUS_EXPR; | |
9637 | oprec = PREC_ADD; | |
9638 | break; | |
9639 | case CPP_MINUS: | |
9640 | opcode = MINUS_EXPR; | |
9641 | oprec = PREC_ADD; | |
9642 | break; | |
9643 | case CPP_LSHIFT: | |
9644 | opcode = LSHIFT_EXPR; | |
9645 | oprec = PREC_SHIFT; | |
9646 | break; | |
9647 | case CPP_RSHIFT: | |
9648 | opcode = RSHIFT_EXPR; | |
9649 | oprec = PREC_SHIFT; | |
9650 | break; | |
9651 | case CPP_AND: | |
9652 | opcode = BIT_AND_EXPR; | |
9653 | oprec = PREC_BITAND; | |
9654 | break; | |
9655 | case CPP_OR: | |
9656 | opcode = BIT_IOR_EXPR; | |
9657 | oprec = PREC_BITOR; | |
9658 | break; | |
9659 | case CPP_XOR: | |
9660 | opcode = BIT_XOR_EXPR; | |
9661 | oprec = PREC_BITXOR; | |
9662 | break; | |
9663 | default: | |
9664 | c_parser_error (parser, | |
9665 | "invalid operator for %<#pragma omp atomic%>"); | |
9666 | goto saw_error; | |
9667 | } | |
9668 | loc = aloc; | |
9669 | c_parser_consume_token (parser); | |
9670 | rhs_loc = c_parser_peek_token (parser)->location; | |
9671 | if (commutative_tree_code (opcode)) | |
9672 | oprec = (enum c_parser_prec) (oprec - 1); | |
9673 | rhs_expr = c_parser_binary_expression (parser, NULL, oprec); | |
9674 | rhs_expr = default_function_array_read_conversion (rhs_loc, | |
9675 | rhs_expr); | |
9676 | rhs = rhs_expr.value; | |
9677 | rhs = c_fully_fold (rhs, false, NULL); | |
9678 | goto stmt_done; | |
9679 | } | |
9680 | /* FALLTHROUGH */ | |
1e8e9920 | 9681 | default: |
9682 | c_parser_error (parser, | |
9683 | "invalid operator for %<#pragma omp atomic%>"); | |
9684 | goto saw_error; | |
9685 | } | |
9686 | ||
fdd84b77 | 9687 | /* Arrange to pass the location of the assignment operator to |
9688 | c_finish_omp_atomic. */ | |
9689 | loc = c_parser_peek_token (parser)->location; | |
1e8e9920 | 9690 | c_parser_consume_token (parser); |
e60a6f7b | 9691 | { |
9692 | location_t rhs_loc = c_parser_peek_token (parser)->location; | |
9693 | rhs_expr = c_parser_expression (parser); | |
abc6c64f | 9694 | rhs_expr = default_function_array_read_conversion (rhs_loc, rhs_expr); |
e60a6f7b | 9695 | } |
3cc31756 | 9696 | rhs = rhs_expr.value; |
a75b1c71 | 9697 | rhs = c_fully_fold (rhs, false, NULL); |
1e8e9920 | 9698 | break; |
9699 | } | |
2169f33b | 9700 | stmt_done: |
9701 | if (structured_block && code == OMP_ATOMIC_CAPTURE_NEW) | |
9702 | { | |
9703 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
9704 | goto saw_error; | |
9705 | v = c_parser_unary_expression (parser).value; | |
9706 | v = c_fully_fold (v, false, NULL); | |
9707 | if (v == error_mark_node) | |
9708 | goto saw_error; | |
9709 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9710 | goto saw_error; | |
9711 | lhs1 = c_parser_unary_expression (parser).value; | |
9712 | lhs1 = c_fully_fold (lhs1, false, NULL); | |
9713 | if (lhs1 == error_mark_node) | |
9714 | goto saw_error; | |
9715 | } | |
9716 | if (structured_block) | |
9717 | { | |
9718 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
9719 | c_parser_require (parser, CPP_CLOSE_BRACE, "expected %<}%>"); | |
9720 | } | |
9721 | done: | |
9722 | stmt = c_finish_omp_atomic (loc, code, opcode, lhs, rhs, v, lhs1, rhs1); | |
d377303f | 9723 | if (stmt != error_mark_node) |
9724 | add_stmt (stmt); | |
2169f33b | 9725 | |
9726 | if (!structured_block) | |
9727 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
1e8e9920 | 9728 | } |
9729 | ||
9730 | ||
9731 | /* OpenMP 2.5: | |
9732 | # pragma omp barrier new-line | |
9733 | */ | |
9734 | ||
9735 | static void | |
9736 | c_parser_omp_barrier (c_parser *parser) | |
9737 | { | |
e60a6f7b | 9738 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 9739 | c_parser_consume_pragma (parser); |
9740 | c_parser_skip_to_pragma_eol (parser); | |
9741 | ||
e60a6f7b | 9742 | c_finish_omp_barrier (loc); |
1e8e9920 | 9743 | } |
9744 | ||
9745 | /* OpenMP 2.5: | |
9746 | # pragma omp critical [(name)] new-line | |
9747 | structured-block | |
e60a6f7b | 9748 | |
9749 | LOC is the location of the #pragma itself. */ | |
1e8e9920 | 9750 | |
9751 | static tree | |
e60a6f7b | 9752 | c_parser_omp_critical (location_t loc, c_parser *parser) |
1e8e9920 | 9753 | { |
9754 | tree stmt, name = NULL; | |
9755 | ||
9756 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
9757 | { | |
9758 | c_parser_consume_token (parser); | |
9759 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
9760 | { | |
9761 | name = c_parser_peek_token (parser)->value; | |
9762 | c_parser_consume_token (parser); | |
9763 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9764 | } | |
9765 | else | |
9766 | c_parser_error (parser, "expected identifier"); | |
9767 | } | |
9768 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
9769 | c_parser_error (parser, "expected %<(%> or end of line"); | |
9770 | c_parser_skip_to_pragma_eol (parser); | |
9771 | ||
9772 | stmt = c_parser_omp_structured_block (parser); | |
e60a6f7b | 9773 | return c_finish_omp_critical (loc, stmt, name); |
1e8e9920 | 9774 | } |
9775 | ||
9776 | /* OpenMP 2.5: | |
9777 | # pragma omp flush flush-vars[opt] new-line | |
9778 | ||
9779 | flush-vars: | |
9780 | ( variable-list ) */ | |
9781 | ||
9782 | static void | |
9783 | c_parser_omp_flush (c_parser *parser) | |
9784 | { | |
e60a6f7b | 9785 | location_t loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 9786 | c_parser_consume_pragma (parser); |
9787 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7d339f93 | 9788 | c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
1e8e9920 | 9789 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) |
9790 | c_parser_error (parser, "expected %<(%> or end of line"); | |
9791 | c_parser_skip_to_pragma_eol (parser); | |
9792 | ||
e60a6f7b | 9793 | c_finish_omp_flush (loc); |
1e8e9920 | 9794 | } |
9795 | ||
f0b5f617 | 9796 | /* Parse the restricted form of the for statement allowed by OpenMP. |
1e8e9920 | 9797 | The real trick here is to determine the loop control variable early |
e60a6f7b | 9798 | so that we can push a new decl if necessary to make it private. |
9799 | LOC is the location of the OMP in "#pragma omp". */ | |
1e8e9920 | 9800 | |
9801 | static tree | |
e60a6f7b | 9802 | c_parser_omp_for_loop (location_t loc, |
9803 | c_parser *parser, tree clauses, tree *par_clauses) | |
1e8e9920 | 9804 | { |
fd6481cf | 9805 | tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl; |
9bc1bf88 | 9806 | tree declv, condv, incrv, initv, ret = NULL; |
fd6481cf | 9807 | bool fail = false, open_brace_parsed = false; |
9808 | int i, collapse = 1, nbraces = 0; | |
e60a6f7b | 9809 | location_t for_loc; |
9bc1bf88 | 9810 | VEC(tree,gc) *for_block = make_tree_vector (); |
fd6481cf | 9811 | |
9812 | for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl)) | |
9813 | if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE) | |
9814 | collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0); | |
9815 | ||
9816 | gcc_assert (collapse >= 1); | |
9817 | ||
9818 | declv = make_tree_vec (collapse); | |
9819 | initv = make_tree_vec (collapse); | |
9820 | condv = make_tree_vec (collapse); | |
9821 | incrv = make_tree_vec (collapse); | |
1e8e9920 | 9822 | |
9823 | if (!c_parser_next_token_is_keyword (parser, RID_FOR)) | |
9824 | { | |
9825 | c_parser_error (parser, "for statement expected"); | |
9826 | return NULL; | |
9827 | } | |
e60a6f7b | 9828 | for_loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 9829 | c_parser_consume_token (parser); |
9830 | ||
fd6481cf | 9831 | for (i = 0; i < collapse; i++) |
1e8e9920 | 9832 | { |
fd6481cf | 9833 | int bracecount = 0; |
1e8e9920 | 9834 | |
fd6481cf | 9835 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
9836 | goto pop_scopes; | |
1e8e9920 | 9837 | |
fd6481cf | 9838 | /* Parse the initialization declaration or expression. */ |
71bb4bc6 | 9839 | if (c_parser_next_tokens_start_declaration (parser)) |
fd6481cf | 9840 | { |
9841 | if (i > 0) | |
9bc1bf88 | 9842 | VEC_safe_push (tree, gc, for_block, c_begin_compound_stmt (true)); |
0a65c3bb | 9843 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL); |
9844 | decl = check_for_loop_decls (for_loc, flag_isoc99); | |
fd6481cf | 9845 | if (decl == NULL) |
9846 | goto error_init; | |
9847 | if (DECL_INITIAL (decl) == error_mark_node) | |
9848 | decl = error_mark_node; | |
9849 | init = decl; | |
9850 | } | |
9851 | else if (c_parser_next_token_is (parser, CPP_NAME) | |
9852 | && c_parser_peek_2nd_token (parser)->type == CPP_EQ) | |
9853 | { | |
8458f4ca | 9854 | struct c_expr decl_exp; |
fd6481cf | 9855 | struct c_expr init_exp; |
b6889cb0 | 9856 | location_t init_loc; |
fd6481cf | 9857 | |
8458f4ca | 9858 | decl_exp = c_parser_postfix_expression (parser); |
9859 | decl = decl_exp.value; | |
fd6481cf | 9860 | |
9861 | c_parser_require (parser, CPP_EQ, "expected %<=%>"); | |
9862 | ||
e60a6f7b | 9863 | init_loc = c_parser_peek_token (parser)->location; |
fd6481cf | 9864 | init_exp = c_parser_expr_no_commas (parser, NULL); |
abc6c64f | 9865 | init_exp = default_function_array_read_conversion (init_loc, |
9866 | init_exp); | |
8458f4ca | 9867 | init = build_modify_expr (init_loc, decl, decl_exp.original_type, |
e60a6f7b | 9868 | NOP_EXPR, init_loc, init_exp.value, |
b9c74b4d | 9869 | init_exp.original_type); |
e60a6f7b | 9870 | init = c_process_expr_stmt (init_loc, init); |
1e8e9920 | 9871 | |
fd6481cf | 9872 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
9873 | } | |
9874 | else | |
9875 | { | |
9876 | error_init: | |
9877 | c_parser_error (parser, | |
9878 | "expected iteration declaration or initialization"); | |
9879 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
9880 | "expected %<)%>"); | |
9881 | fail = true; | |
9882 | goto parse_next; | |
9883 | } | |
9884 | ||
9885 | /* Parse the loop condition. */ | |
9886 | cond = NULL_TREE; | |
9887 | if (c_parser_next_token_is_not (parser, CPP_SEMICOLON)) | |
9888 | { | |
e3b80d49 | 9889 | location_t cond_loc = c_parser_peek_token (parser)->location; |
2169f33b | 9890 | struct c_expr cond_expr = c_parser_binary_expression (parser, NULL, |
9891 | PREC_NONE); | |
e3b80d49 | 9892 | |
4390875c | 9893 | cond = cond_expr.value; |
e3b80d49 | 9894 | cond = c_objc_common_truthvalue_conversion (cond_loc, cond); |
a75b1c71 | 9895 | cond = c_fully_fold (cond, false, NULL); |
4390875c | 9896 | switch (cond_expr.original_code) |
9897 | { | |
9898 | case GT_EXPR: | |
9899 | case GE_EXPR: | |
9900 | case LT_EXPR: | |
9901 | case LE_EXPR: | |
9902 | break; | |
9903 | default: | |
9904 | /* Can't be cond = error_mark_node, because we want to preserve | |
9905 | the location until c_finish_omp_for. */ | |
9906 | cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node); | |
9907 | break; | |
9908 | } | |
b6889cb0 | 9909 | protected_set_expr_location (cond, cond_loc); |
fd6481cf | 9910 | } |
1e8e9920 | 9911 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1e8e9920 | 9912 | |
fd6481cf | 9913 | /* Parse the increment expression. */ |
9914 | incr = NULL_TREE; | |
9915 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)) | |
b6889cb0 | 9916 | { |
9917 | location_t incr_loc = c_parser_peek_token (parser)->location; | |
9918 | ||
e60a6f7b | 9919 | incr = c_process_expr_stmt (incr_loc, |
9920 | c_parser_expression (parser).value); | |
b6889cb0 | 9921 | } |
fd6481cf | 9922 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
1e8e9920 | 9923 | |
fd6481cf | 9924 | if (decl == NULL || decl == error_mark_node || init == error_mark_node) |
9925 | fail = true; | |
9926 | else | |
9927 | { | |
9928 | TREE_VEC_ELT (declv, i) = decl; | |
9929 | TREE_VEC_ELT (initv, i) = init; | |
9930 | TREE_VEC_ELT (condv, i) = cond; | |
9931 | TREE_VEC_ELT (incrv, i) = incr; | |
9932 | } | |
9933 | ||
9934 | parse_next: | |
9935 | if (i == collapse - 1) | |
9936 | break; | |
9937 | ||
9938 | /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed | |
9939 | in between the collapsed for loops to be still considered perfectly | |
9940 | nested. Hopefully the final version clarifies this. | |
9941 | For now handle (multiple) {'s and empty statements. */ | |
9942 | do | |
9943 | { | |
9944 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
9945 | { | |
9946 | c_parser_consume_token (parser); | |
9947 | break; | |
9948 | } | |
9949 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
9950 | { | |
9951 | c_parser_consume_token (parser); | |
9952 | bracecount++; | |
9953 | } | |
9954 | else if (bracecount | |
9955 | && c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
9956 | c_parser_consume_token (parser); | |
9957 | else | |
9958 | { | |
9959 | c_parser_error (parser, "not enough perfectly nested loops"); | |
9960 | if (bracecount) | |
9961 | { | |
9962 | open_brace_parsed = true; | |
9963 | bracecount--; | |
9964 | } | |
9965 | fail = true; | |
9966 | collapse = 0; | |
9967 | break; | |
9968 | } | |
9969 | } | |
9970 | while (1); | |
9971 | ||
9972 | nbraces += bracecount; | |
9973 | } | |
1e8e9920 | 9974 | |
1e8e9920 | 9975 | save_break = c_break_label; |
9976 | c_break_label = size_one_node; | |
9977 | save_cont = c_cont_label; | |
9978 | c_cont_label = NULL_TREE; | |
9979 | body = push_stmt_list (); | |
9980 | ||
fd6481cf | 9981 | if (open_brace_parsed) |
9982 | { | |
e60a6f7b | 9983 | location_t here = c_parser_peek_token (parser)->location; |
fd6481cf | 9984 | stmt = c_begin_compound_stmt (true); |
9985 | c_parser_compound_statement_nostart (parser); | |
e60a6f7b | 9986 | add_stmt (c_end_compound_stmt (here, stmt, true)); |
fd6481cf | 9987 | } |
9988 | else | |
9989 | add_stmt (c_parser_c99_block_statement (parser)); | |
1e8e9920 | 9990 | if (c_cont_label) |
e60a6f7b | 9991 | { |
9992 | tree t = build1 (LABEL_EXPR, void_type_node, c_cont_label); | |
9993 | SET_EXPR_LOCATION (t, loc); | |
9994 | add_stmt (t); | |
9995 | } | |
1e8e9920 | 9996 | |
9997 | body = pop_stmt_list (body); | |
9998 | c_break_label = save_break; | |
9999 | c_cont_label = save_cont; | |
10000 | ||
fd6481cf | 10001 | while (nbraces) |
10002 | { | |
10003 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10004 | { | |
10005 | c_parser_consume_token (parser); | |
10006 | nbraces--; | |
10007 | } | |
10008 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
10009 | c_parser_consume_token (parser); | |
10010 | else | |
10011 | { | |
10012 | c_parser_error (parser, "collapsed loops not perfectly nested"); | |
10013 | while (nbraces) | |
10014 | { | |
e60a6f7b | 10015 | location_t here = c_parser_peek_token (parser)->location; |
fd6481cf | 10016 | stmt = c_begin_compound_stmt (true); |
10017 | add_stmt (body); | |
10018 | c_parser_compound_statement_nostart (parser); | |
e60a6f7b | 10019 | body = c_end_compound_stmt (here, stmt, true); |
fd6481cf | 10020 | nbraces--; |
10021 | } | |
10022 | goto pop_scopes; | |
10023 | } | |
10024 | } | |
10025 | ||
bb436d4e | 10026 | /* Only bother calling c_finish_omp_for if we haven't already generated |
1e8e9920 | 10027 | an error from the initialization parsing. */ |
fd6481cf | 10028 | if (!fail) |
10029 | { | |
10030 | stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL); | |
10031 | if (stmt) | |
10032 | { | |
10033 | if (par_clauses != NULL) | |
10034 | { | |
10035 | tree *c; | |
10036 | for (c = par_clauses; *c ; ) | |
10037 | if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE | |
10038 | && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE) | |
10039 | c = &OMP_CLAUSE_CHAIN (*c); | |
10040 | else | |
10041 | { | |
10042 | for (i = 0; i < collapse; i++) | |
10043 | if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c)) | |
10044 | break; | |
10045 | if (i == collapse) | |
10046 | c = &OMP_CLAUSE_CHAIN (*c); | |
10047 | else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE) | |
10048 | { | |
e3b80d49 | 10049 | error_at (loc, |
10050 | "iteration variable %qD should not be firstprivate", | |
10051 | OMP_CLAUSE_DECL (*c)); | |
fd6481cf | 10052 | *c = OMP_CLAUSE_CHAIN (*c); |
10053 | } | |
10054 | else | |
10055 | { | |
10056 | /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES, | |
10057 | change it to shared (decl) in | |
10058 | OMP_PARALLEL_CLAUSES. */ | |
e60a6f7b | 10059 | tree l = build_omp_clause (OMP_CLAUSE_LOCATION (*c), |
10060 | OMP_CLAUSE_LASTPRIVATE); | |
fd6481cf | 10061 | OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c); |
10062 | OMP_CLAUSE_CHAIN (l) = clauses; | |
10063 | clauses = l; | |
10064 | OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED); | |
10065 | } | |
10066 | } | |
10067 | } | |
10068 | OMP_FOR_CLAUSES (stmt) = clauses; | |
10069 | } | |
10070 | ret = stmt; | |
10071 | } | |
10072 | pop_scopes: | |
9bc1bf88 | 10073 | while (!VEC_empty (tree, for_block)) |
fd6481cf | 10074 | { |
e60a6f7b | 10075 | /* FIXME diagnostics: LOC below should be the actual location of |
10076 | this particular for block. We need to build a list of | |
10077 | locations to go along with FOR_BLOCK. */ | |
9bc1bf88 | 10078 | stmt = c_end_compound_stmt (loc, VEC_pop (tree, for_block), true); |
fd6481cf | 10079 | add_stmt (stmt); |
fd6481cf | 10080 | } |
9bc1bf88 | 10081 | release_tree_vector (for_block); |
fd6481cf | 10082 | return ret; |
1e8e9920 | 10083 | } |
10084 | ||
10085 | /* OpenMP 2.5: | |
10086 | #pragma omp for for-clause[optseq] new-line | |
10087 | for-loop | |
e60a6f7b | 10088 | |
10089 | LOC is the location of the #pragma token. | |
1e8e9920 | 10090 | */ |
10091 | ||
10092 | #define OMP_FOR_CLAUSE_MASK \ | |
10093 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10094 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10095 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
10096 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10097 | | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \ | |
10098 | | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \ | |
fd6481cf | 10099 | | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \ |
1e8e9920 | 10100 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) |
10101 | ||
10102 | static tree | |
e60a6f7b | 10103 | c_parser_omp_for (location_t loc, c_parser *parser) |
1e8e9920 | 10104 | { |
10105 | tree block, clauses, ret; | |
10106 | ||
10107 | clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK, | |
10108 | "#pragma omp for"); | |
10109 | ||
10110 | block = c_begin_compound_stmt (true); | |
e60a6f7b | 10111 | ret = c_parser_omp_for_loop (loc, parser, clauses, NULL); |
10112 | block = c_end_compound_stmt (loc, block, true); | |
1e8e9920 | 10113 | add_stmt (block); |
10114 | ||
10115 | return ret; | |
10116 | } | |
10117 | ||
10118 | /* OpenMP 2.5: | |
10119 | # pragma omp master new-line | |
10120 | structured-block | |
e60a6f7b | 10121 | |
10122 | LOC is the location of the #pragma token. | |
1e8e9920 | 10123 | */ |
10124 | ||
10125 | static tree | |
e60a6f7b | 10126 | c_parser_omp_master (location_t loc, c_parser *parser) |
1e8e9920 | 10127 | { |
10128 | c_parser_skip_to_pragma_eol (parser); | |
e60a6f7b | 10129 | return c_finish_omp_master (loc, c_parser_omp_structured_block (parser)); |
1e8e9920 | 10130 | } |
10131 | ||
10132 | /* OpenMP 2.5: | |
10133 | # pragma omp ordered new-line | |
10134 | structured-block | |
e60a6f7b | 10135 | |
10136 | LOC is the location of the #pragma itself. | |
1e8e9920 | 10137 | */ |
10138 | ||
10139 | static tree | |
e60a6f7b | 10140 | c_parser_omp_ordered (location_t loc, c_parser *parser) |
1e8e9920 | 10141 | { |
10142 | c_parser_skip_to_pragma_eol (parser); | |
e60a6f7b | 10143 | return c_finish_omp_ordered (loc, c_parser_omp_structured_block (parser)); |
1e8e9920 | 10144 | } |
10145 | ||
10146 | /* OpenMP 2.5: | |
10147 | ||
10148 | section-scope: | |
10149 | { section-sequence } | |
10150 | ||
10151 | section-sequence: | |
10152 | section-directive[opt] structured-block | |
48e1416a | 10153 | section-sequence section-directive structured-block |
e60a6f7b | 10154 | |
10155 | SECTIONS_LOC is the location of the #pragma omp sections. */ | |
1e8e9920 | 10156 | |
10157 | static tree | |
e60a6f7b | 10158 | c_parser_omp_sections_scope (location_t sections_loc, c_parser *parser) |
1e8e9920 | 10159 | { |
10160 | tree stmt, substmt; | |
10161 | bool error_suppress = false; | |
10162 | location_t loc; | |
10163 | ||
e60a6f7b | 10164 | loc = c_parser_peek_token (parser)->location; |
1e8e9920 | 10165 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
10166 | { | |
10167 | /* Avoid skipping until the end of the block. */ | |
10168 | parser->error = false; | |
10169 | return NULL_TREE; | |
10170 | } | |
10171 | ||
10172 | stmt = push_stmt_list (); | |
10173 | ||
1e8e9920 | 10174 | if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION) |
10175 | { | |
10176 | substmt = push_stmt_list (); | |
10177 | ||
10178 | while (1) | |
10179 | { | |
10180 | c_parser_statement (parser); | |
10181 | ||
10182 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
10183 | break; | |
10184 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10185 | break; | |
10186 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
10187 | break; | |
10188 | } | |
10189 | ||
10190 | substmt = pop_stmt_list (substmt); | |
10191 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
10192 | SET_EXPR_LOCATION (substmt, loc); | |
10193 | add_stmt (substmt); | |
10194 | } | |
10195 | ||
10196 | while (1) | |
10197 | { | |
10198 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10199 | break; | |
10200 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
10201 | break; | |
10202 | ||
10203 | loc = c_parser_peek_token (parser)->location; | |
10204 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
10205 | { | |
10206 | c_parser_consume_pragma (parser); | |
10207 | c_parser_skip_to_pragma_eol (parser); | |
10208 | error_suppress = false; | |
10209 | } | |
10210 | else if (!error_suppress) | |
10211 | { | |
e3b80d49 | 10212 | error_at (loc, "expected %<#pragma omp section%> or %<}%>"); |
1e8e9920 | 10213 | error_suppress = true; |
10214 | } | |
10215 | ||
10216 | substmt = c_parser_omp_structured_block (parser); | |
10217 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
10218 | SET_EXPR_LOCATION (substmt, loc); | |
10219 | add_stmt (substmt); | |
10220 | } | |
10221 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, | |
10222 | "expected %<#pragma omp section%> or %<}%>"); | |
10223 | ||
10224 | substmt = pop_stmt_list (stmt); | |
10225 | ||
10226 | stmt = make_node (OMP_SECTIONS); | |
e60a6f7b | 10227 | SET_EXPR_LOCATION (stmt, sections_loc); |
1e8e9920 | 10228 | TREE_TYPE (stmt) = void_type_node; |
10229 | OMP_SECTIONS_BODY (stmt) = substmt; | |
10230 | ||
10231 | return add_stmt (stmt); | |
10232 | } | |
10233 | ||
10234 | /* OpenMP 2.5: | |
10235 | # pragma omp sections sections-clause[optseq] newline | |
10236 | sections-scope | |
e60a6f7b | 10237 | |
10238 | LOC is the location of the #pragma token. | |
1e8e9920 | 10239 | */ |
10240 | ||
10241 | #define OMP_SECTIONS_CLAUSE_MASK \ | |
10242 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10243 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10244 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
10245 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10246 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
10247 | ||
10248 | static tree | |
e60a6f7b | 10249 | c_parser_omp_sections (location_t loc, c_parser *parser) |
1e8e9920 | 10250 | { |
10251 | tree block, clauses, ret; | |
10252 | ||
10253 | clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK, | |
10254 | "#pragma omp sections"); | |
10255 | ||
10256 | block = c_begin_compound_stmt (true); | |
e60a6f7b | 10257 | ret = c_parser_omp_sections_scope (loc, parser); |
1e8e9920 | 10258 | if (ret) |
10259 | OMP_SECTIONS_CLAUSES (ret) = clauses; | |
e60a6f7b | 10260 | block = c_end_compound_stmt (loc, block, true); |
1e8e9920 | 10261 | add_stmt (block); |
10262 | ||
10263 | return ret; | |
10264 | } | |
10265 | ||
10266 | /* OpenMP 2.5: | |
10267 | # pragma parallel parallel-clause new-line | |
10268 | # pragma parallel for parallel-for-clause new-line | |
10269 | # pragma parallel sections parallel-sections-clause new-line | |
e60a6f7b | 10270 | |
10271 | LOC is the location of the #pragma token. | |
1e8e9920 | 10272 | */ |
10273 | ||
10274 | #define OMP_PARALLEL_CLAUSE_MASK \ | |
10275 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
10276 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10277 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10278 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
10279 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ | |
10280 | | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \ | |
10281 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10282 | | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS)) | |
10283 | ||
10284 | static tree | |
e60a6f7b | 10285 | c_parser_omp_parallel (location_t loc, c_parser *parser) |
1e8e9920 | 10286 | { |
10287 | enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL; | |
10288 | const char *p_name = "#pragma omp parallel"; | |
10289 | tree stmt, clauses, par_clause, ws_clause, block; | |
10290 | unsigned int mask = OMP_PARALLEL_CLAUSE_MASK; | |
10291 | ||
10292 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
10293 | { | |
10294 | c_parser_consume_token (parser); | |
10295 | p_kind = PRAGMA_OMP_PARALLEL_FOR; | |
10296 | p_name = "#pragma omp parallel for"; | |
10297 | mask |= OMP_FOR_CLAUSE_MASK; | |
10298 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
10299 | } | |
10300 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
10301 | { | |
10302 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
10303 | if (strcmp (p, "sections") == 0) | |
10304 | { | |
10305 | c_parser_consume_token (parser); | |
10306 | p_kind = PRAGMA_OMP_PARALLEL_SECTIONS; | |
10307 | p_name = "#pragma omp parallel sections"; | |
10308 | mask |= OMP_SECTIONS_CLAUSE_MASK; | |
10309 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
10310 | } | |
10311 | } | |
10312 | ||
10313 | clauses = c_parser_omp_all_clauses (parser, mask, p_name); | |
10314 | ||
10315 | switch (p_kind) | |
10316 | { | |
10317 | case PRAGMA_OMP_PARALLEL: | |
10318 | block = c_begin_omp_parallel (); | |
10319 | c_parser_statement (parser); | |
e60a6f7b | 10320 | stmt = c_finish_omp_parallel (loc, clauses, block); |
1e8e9920 | 10321 | break; |
10322 | ||
10323 | case PRAGMA_OMP_PARALLEL_FOR: | |
10324 | block = c_begin_omp_parallel (); | |
e60a6f7b | 10325 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
10326 | c_parser_omp_for_loop (loc, parser, ws_clause, &par_clause); | |
10327 | stmt = c_finish_omp_parallel (loc, par_clause, block); | |
87f7c31e | 10328 | OMP_PARALLEL_COMBINED (stmt) = 1; |
1e8e9920 | 10329 | break; |
10330 | ||
10331 | case PRAGMA_OMP_PARALLEL_SECTIONS: | |
10332 | block = c_begin_omp_parallel (); | |
e60a6f7b | 10333 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
10334 | stmt = c_parser_omp_sections_scope (loc, parser); | |
1e8e9920 | 10335 | if (stmt) |
10336 | OMP_SECTIONS_CLAUSES (stmt) = ws_clause; | |
e60a6f7b | 10337 | stmt = c_finish_omp_parallel (loc, par_clause, block); |
87f7c31e | 10338 | OMP_PARALLEL_COMBINED (stmt) = 1; |
1e8e9920 | 10339 | break; |
10340 | ||
10341 | default: | |
10342 | gcc_unreachable (); | |
10343 | } | |
10344 | ||
10345 | return stmt; | |
10346 | } | |
10347 | ||
10348 | /* OpenMP 2.5: | |
10349 | # pragma omp single single-clause[optseq] new-line | |
10350 | structured-block | |
e60a6f7b | 10351 | |
10352 | LOC is the location of the #pragma. | |
1e8e9920 | 10353 | */ |
10354 | ||
10355 | #define OMP_SINGLE_CLAUSE_MASK \ | |
10356 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10357 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10358 | | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \ | |
10359 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
10360 | ||
10361 | static tree | |
e60a6f7b | 10362 | c_parser_omp_single (location_t loc, c_parser *parser) |
1e8e9920 | 10363 | { |
10364 | tree stmt = make_node (OMP_SINGLE); | |
e60a6f7b | 10365 | SET_EXPR_LOCATION (stmt, loc); |
1e8e9920 | 10366 | TREE_TYPE (stmt) = void_type_node; |
10367 | ||
10368 | OMP_SINGLE_CLAUSES (stmt) | |
10369 | = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK, | |
10370 | "#pragma omp single"); | |
10371 | OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser); | |
10372 | ||
10373 | return add_stmt (stmt); | |
10374 | } | |
10375 | ||
fd6481cf | 10376 | /* OpenMP 3.0: |
10377 | # pragma omp task task-clause[optseq] new-line | |
e60a6f7b | 10378 | |
10379 | LOC is the location of the #pragma. | |
fd6481cf | 10380 | */ |
10381 | ||
10382 | #define OMP_TASK_CLAUSE_MASK \ | |
10383 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
10384 | | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \ | |
10385 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
10386 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10387 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
2169f33b | 10388 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ |
10389 | | (1u << PRAGMA_OMP_CLAUSE_FINAL) \ | |
10390 | | (1u << PRAGMA_OMP_CLAUSE_MERGEABLE)) | |
fd6481cf | 10391 | |
10392 | static tree | |
e60a6f7b | 10393 | c_parser_omp_task (location_t loc, c_parser *parser) |
fd6481cf | 10394 | { |
10395 | tree clauses, block; | |
10396 | ||
10397 | clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK, | |
10398 | "#pragma omp task"); | |
10399 | ||
10400 | block = c_begin_omp_task (); | |
10401 | c_parser_statement (parser); | |
e60a6f7b | 10402 | return c_finish_omp_task (loc, clauses, block); |
fd6481cf | 10403 | } |
10404 | ||
10405 | /* OpenMP 3.0: | |
10406 | # pragma omp taskwait new-line | |
10407 | */ | |
10408 | ||
10409 | static void | |
10410 | c_parser_omp_taskwait (c_parser *parser) | |
10411 | { | |
e60a6f7b | 10412 | location_t loc = c_parser_peek_token (parser)->location; |
fd6481cf | 10413 | c_parser_consume_pragma (parser); |
10414 | c_parser_skip_to_pragma_eol (parser); | |
10415 | ||
e60a6f7b | 10416 | c_finish_omp_taskwait (loc); |
fd6481cf | 10417 | } |
1e8e9920 | 10418 | |
2169f33b | 10419 | /* OpenMP 3.1: |
10420 | # pragma omp taskyield new-line | |
10421 | */ | |
10422 | ||
10423 | static void | |
10424 | c_parser_omp_taskyield (c_parser *parser) | |
10425 | { | |
10426 | location_t loc = c_parser_peek_token (parser)->location; | |
10427 | c_parser_consume_pragma (parser); | |
10428 | c_parser_skip_to_pragma_eol (parser); | |
10429 | ||
10430 | c_finish_omp_taskyield (loc); | |
10431 | } | |
10432 | ||
1e8e9920 | 10433 | /* Main entry point to parsing most OpenMP pragmas. */ |
10434 | ||
10435 | static void | |
10436 | c_parser_omp_construct (c_parser *parser) | |
10437 | { | |
10438 | enum pragma_kind p_kind; | |
10439 | location_t loc; | |
10440 | tree stmt; | |
10441 | ||
10442 | loc = c_parser_peek_token (parser)->location; | |
10443 | p_kind = c_parser_peek_token (parser)->pragma_kind; | |
10444 | c_parser_consume_pragma (parser); | |
10445 | ||
10446 | switch (p_kind) | |
10447 | { | |
10448 | case PRAGMA_OMP_ATOMIC: | |
e60a6f7b | 10449 | c_parser_omp_atomic (loc, parser); |
1e8e9920 | 10450 | return; |
10451 | case PRAGMA_OMP_CRITICAL: | |
e60a6f7b | 10452 | stmt = c_parser_omp_critical (loc, parser); |
1e8e9920 | 10453 | break; |
10454 | case PRAGMA_OMP_FOR: | |
e60a6f7b | 10455 | stmt = c_parser_omp_for (loc, parser); |
1e8e9920 | 10456 | break; |
10457 | case PRAGMA_OMP_MASTER: | |
e60a6f7b | 10458 | stmt = c_parser_omp_master (loc, parser); |
1e8e9920 | 10459 | break; |
10460 | case PRAGMA_OMP_ORDERED: | |
e60a6f7b | 10461 | stmt = c_parser_omp_ordered (loc, parser); |
1e8e9920 | 10462 | break; |
10463 | case PRAGMA_OMP_PARALLEL: | |
e60a6f7b | 10464 | stmt = c_parser_omp_parallel (loc, parser); |
1e8e9920 | 10465 | break; |
10466 | case PRAGMA_OMP_SECTIONS: | |
e60a6f7b | 10467 | stmt = c_parser_omp_sections (loc, parser); |
1e8e9920 | 10468 | break; |
10469 | case PRAGMA_OMP_SINGLE: | |
e60a6f7b | 10470 | stmt = c_parser_omp_single (loc, parser); |
1e8e9920 | 10471 | break; |
fd6481cf | 10472 | case PRAGMA_OMP_TASK: |
e60a6f7b | 10473 | stmt = c_parser_omp_task (loc, parser); |
fd6481cf | 10474 | break; |
1e8e9920 | 10475 | default: |
10476 | gcc_unreachable (); | |
10477 | } | |
10478 | ||
10479 | if (stmt) | |
e60a6f7b | 10480 | gcc_assert (EXPR_LOCATION (stmt) != UNKNOWN_LOCATION); |
1e8e9920 | 10481 | } |
10482 | ||
10483 | ||
10484 | /* OpenMP 2.5: | |
10485 | # pragma omp threadprivate (variable-list) */ | |
10486 | ||
10487 | static void | |
10488 | c_parser_omp_threadprivate (c_parser *parser) | |
10489 | { | |
10490 | tree vars, t; | |
e60a6f7b | 10491 | location_t loc; |
1e8e9920 | 10492 | |
10493 | c_parser_consume_pragma (parser); | |
e60a6f7b | 10494 | loc = c_parser_peek_token (parser)->location; |
7d339f93 | 10495 | vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
1e8e9920 | 10496 | |
1e8e9920 | 10497 | /* Mark every variable in VARS to be assigned thread local storage. */ |
10498 | for (t = vars; t; t = TREE_CHAIN (t)) | |
10499 | { | |
10500 | tree v = TREE_PURPOSE (t); | |
10501 | ||
e60a6f7b | 10502 | /* FIXME diagnostics: Ideally we should keep individual |
10503 | locations for all the variables in the var list to make the | |
10504 | following errors more precise. Perhaps | |
10505 | c_parser_omp_var_list_parens() should construct a list of | |
10506 | locations to go along with the var list. */ | |
10507 | ||
1e8e9920 | 10508 | /* If V had already been marked threadprivate, it doesn't matter |
10509 | whether it had been used prior to this point. */ | |
50389d5d | 10510 | if (TREE_CODE (v) != VAR_DECL) |
e60a6f7b | 10511 | error_at (loc, "%qD is not a variable", v); |
50389d5d | 10512 | else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v)) |
e60a6f7b | 10513 | error_at (loc, "%qE declared %<threadprivate%> after first use", v); |
1e8e9920 | 10514 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) |
e60a6f7b | 10515 | error_at (loc, "automatic variable %qE cannot be %<threadprivate%>", v); |
50389d5d | 10516 | else if (TREE_TYPE (v) == error_mark_node) |
10517 | ; | |
1e8e9920 | 10518 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) |
e60a6f7b | 10519 | error_at (loc, "%<threadprivate%> %qE has incomplete type", v); |
1e8e9920 | 10520 | else |
10521 | { | |
10522 | if (! DECL_THREAD_LOCAL_P (v)) | |
10523 | { | |
10524 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
10525 | /* If rtl has been already set for this var, call | |
10526 | make_decl_rtl once again, so that encode_section_info | |
10527 | has a chance to look at the new decl flags. */ | |
10528 | if (DECL_RTL_SET_P (v)) | |
10529 | make_decl_rtl (v); | |
10530 | } | |
10531 | C_DECL_THREADPRIVATE_P (v) = 1; | |
10532 | } | |
10533 | } | |
10534 | ||
10535 | c_parser_skip_to_pragma_eol (parser); | |
10536 | } | |
10537 | ||
b75b98aa | 10538 | \f |
1576dec7 | 10539 | /* Parse a single source file. */ |
10540 | ||
10541 | void | |
10542 | c_parse_file (void) | |
10543 | { | |
b75b98aa | 10544 | /* Use local storage to begin. If the first token is a pragma, parse it. |
10545 | If it is #pragma GCC pch_preprocess, then this will load a PCH file | |
10546 | which will cause garbage collection. */ | |
10547 | c_parser tparser; | |
10548 | ||
10549 | memset (&tparser, 0, sizeof tparser); | |
10550 | the_parser = &tparser; | |
10551 | ||
10552 | if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS) | |
10553 | c_parser_pragma_pch_preprocess (&tparser); | |
10554 | ||
ba72912a | 10555 | the_parser = ggc_alloc_c_parser (); |
b75b98aa | 10556 | *the_parser = tparser; |
10557 | ||
58d82cd0 | 10558 | /* Initialize EH, if we've been told to do so. */ |
10559 | if (flag_exceptions) | |
e38def9c | 10560 | using_eh_for_cleanups (); |
58d82cd0 | 10561 | |
1576dec7 | 10562 | c_parser_translation_unit (the_parser); |
10563 | the_parser = NULL; | |
10564 | } | |
10565 | ||
10566 | #include "gt-c-parser.h" |