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27bf414c JM |
1 | /* Parser for C and Objective-C. |
2 | Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
9243c51d JJ |
3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, |
4 | 2012 Free Software Foundation, Inc. | |
27bf414c JM |
5 | |
6 | Parser actions based on the old Bison parser; structure somewhat | |
7 | influenced by and fragments based on the C++ parser. | |
8 | ||
9 | This file is part of GCC. | |
10 | ||
11 | GCC is free software; you can redistribute it and/or modify it under | |
12 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 13 | Software Foundation; either version 3, or (at your option) any later |
27bf414c JM |
14 | version. |
15 | ||
16 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
27bf414c JM |
24 | |
25 | /* TODO: | |
26 | ||
27 | Make sure all relevant comments, and all relevant code from all | |
28 | actions, brought over from old parser. Verify exact correspondence | |
29 | of syntax accepted. | |
30 | ||
31 | Add testcases covering every input symbol in every state in old and | |
32 | new parsers. | |
33 | ||
34 | Include full syntax for GNU C, including erroneous cases accepted | |
35 | with error messages, in syntax productions in comments. | |
36 | ||
37 | Make more diagnostics in the front end generally take an explicit | |
38 | location rather than implicitly using input_location. */ | |
39 | ||
40 | #include "config.h" | |
41 | #include "system.h" | |
42 | #include "coretypes.h" | |
f4ce02c5 | 43 | #include "tm.h" /* For rtl.h: needs enum reg_class. */ |
27bf414c JM |
44 | #include "tree.h" |
45 | #include "langhooks.h" | |
46 | #include "input.h" | |
47 | #include "cpplib.h" | |
48 | #include "timevar.h" | |
39dabefd | 49 | #include "c-family/c-pragma.h" |
27bf414c JM |
50 | #include "c-tree.h" |
51 | #include "flags.h" | |
27bf414c | 52 | #include "ggc.h" |
39dabefd | 53 | #include "c-family/c-common.h" |
61d3ce20 | 54 | #include "c-family/c-objc.h" |
bc4071dd RH |
55 | #include "vec.h" |
56 | #include "target.h" | |
474eccc6 | 57 | #include "cgraph.h" |
68a607d8 | 58 | #include "plugin.h" |
27bf414c JM |
59 | |
60 | \f | |
27bf414c JM |
61 | /* Initialization routine for this file. */ |
62 | ||
63 | void | |
64 | c_parse_init (void) | |
65 | { | |
66 | /* The only initialization required is of the reserved word | |
67 | identifiers. */ | |
68 | unsigned int i; | |
69 | tree id; | |
eea1139b | 70 | int mask = 0; |
27bf414c | 71 | |
36c5e70a BE |
72 | /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in |
73 | the c_token structure. */ | |
74 | gcc_assert (RID_MAX <= 255); | |
75 | ||
eea1139b ILT |
76 | mask |= D_CXXONLY; |
77 | if (!flag_isoc99) | |
78 | mask |= D_C99; | |
79 | if (flag_no_asm) | |
80 | { | |
81 | mask |= D_ASM | D_EXT; | |
82 | if (!flag_isoc99) | |
83 | mask |= D_EXT89; | |
84 | } | |
27bf414c | 85 | if (!c_dialect_objc ()) |
eea1139b | 86 | mask |= D_OBJC | D_CXX_OBJC; |
27bf414c | 87 | |
a9429e29 | 88 | ridpointers = ggc_alloc_cleared_vec_tree ((int) RID_MAX); |
eea1139b | 89 | for (i = 0; i < num_c_common_reswords; i++) |
27bf414c JM |
90 | { |
91 | /* If a keyword is disabled, do not enter it into the table | |
92 | and so create a canonical spelling that isn't a keyword. */ | |
eea1139b ILT |
93 | if (c_common_reswords[i].disable & mask) |
94 | { | |
95 | if (warn_cxx_compat | |
96 | && (c_common_reswords[i].disable & D_CXXWARN)) | |
97 | { | |
98 | id = get_identifier (c_common_reswords[i].word); | |
99 | C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN); | |
100 | C_IS_RESERVED_WORD (id) = 1; | |
101 | } | |
102 | continue; | |
103 | } | |
27bf414c | 104 | |
eea1139b ILT |
105 | id = get_identifier (c_common_reswords[i].word); |
106 | C_SET_RID_CODE (id, c_common_reswords[i].rid); | |
27bf414c | 107 | C_IS_RESERVED_WORD (id) = 1; |
eea1139b | 108 | ridpointers [(int) c_common_reswords[i].rid] = id; |
27bf414c JM |
109 | } |
110 | } | |
111 | \f | |
112 | /* The C lexer intermediates between the lexer in cpplib and c-lex.c | |
113 | and the C parser. Unlike the C++ lexer, the parser structure | |
114 | stores the lexer information instead of using a separate structure. | |
115 | Identifiers are separated into ordinary identifiers, type names, | |
116 | keywords and some other Objective-C types of identifiers, and some | |
117 | look-ahead is maintained. | |
118 | ||
119 | ??? It might be a good idea to lex the whole file up front (as for | |
120 | C++). It would then be possible to share more of the C and C++ | |
121 | lexer code, if desired. */ | |
122 | ||
123 | /* The following local token type is used. */ | |
124 | ||
125 | /* A keyword. */ | |
126 | #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1)) | |
127 | ||
27bf414c JM |
128 | /* More information about the type of a CPP_NAME token. */ |
129 | typedef enum c_id_kind { | |
130 | /* An ordinary identifier. */ | |
131 | C_ID_ID, | |
132 | /* An identifier declared as a typedef name. */ | |
133 | C_ID_TYPENAME, | |
134 | /* An identifier declared as an Objective-C class name. */ | |
135 | C_ID_CLASSNAME, | |
36c5e70a BE |
136 | /* An address space identifier. */ |
137 | C_ID_ADDRSPACE, | |
27bf414c JM |
138 | /* Not an identifier. */ |
139 | C_ID_NONE | |
140 | } c_id_kind; | |
141 | ||
142 | /* A single C token after string literal concatenation and conversion | |
143 | of preprocessing tokens to tokens. */ | |
d1b38208 | 144 | typedef struct GTY (()) c_token { |
27bf414c JM |
145 | /* The kind of token. */ |
146 | ENUM_BITFIELD (cpp_ttype) type : 8; | |
147 | /* If this token is a CPP_NAME, this value indicates whether also | |
148 | declared as some kind of type. Otherwise, it is C_ID_NONE. */ | |
149 | ENUM_BITFIELD (c_id_kind) id_kind : 8; | |
150 | /* If this token is a keyword, this value indicates which keyword. | |
151 | Otherwise, this value is RID_MAX. */ | |
152 | ENUM_BITFIELD (rid) keyword : 8; | |
bc4071dd RH |
153 | /* If this token is a CPP_PRAGMA, this indicates the pragma that |
154 | was seen. Otherwise it is PRAGMA_NONE. */ | |
13fa1171 | 155 | ENUM_BITFIELD (pragma_kind) pragma_kind : 8; |
27bf414c JM |
156 | /* The location at which this token was found. */ |
157 | location_t location; | |
8415f317 NF |
158 | /* The value associated with this token, if any. */ |
159 | tree value; | |
27bf414c JM |
160 | } c_token; |
161 | ||
162 | /* A parser structure recording information about the state and | |
163 | context of parsing. Includes lexer information with up to two | |
164 | tokens of look-ahead; more are not needed for C. */ | |
d1b38208 | 165 | typedef struct GTY(()) c_parser { |
27bf414c JM |
166 | /* The look-ahead tokens. */ |
167 | c_token tokens[2]; | |
168 | /* How many look-ahead tokens are available (0, 1 or 2). */ | |
169 | short tokens_avail; | |
170 | /* True if a syntax error is being recovered from; false otherwise. | |
171 | c_parser_error sets this flag. It should clear this flag when | |
172 | enough tokens have been consumed to recover from the error. */ | |
173 | BOOL_BITFIELD error : 1; | |
bc4071dd RH |
174 | /* True if we're processing a pragma, and shouldn't automatically |
175 | consume CPP_PRAGMA_EOL. */ | |
176 | BOOL_BITFIELD in_pragma : 1; | |
b4b56033 MLI |
177 | /* True if we're parsing the outermost block of an if statement. */ |
178 | BOOL_BITFIELD in_if_block : 1; | |
46c2514e TT |
179 | /* True if we want to lex an untranslated string. */ |
180 | BOOL_BITFIELD lex_untranslated_string : 1; | |
1973201f | 181 | |
0bacb8c7 | 182 | /* Objective-C specific parser/lexer information. */ |
1973201f NP |
183 | |
184 | /* True if we are in a context where the Objective-C "PQ" keywords | |
185 | are considered keywords. */ | |
0bacb8c7 | 186 | BOOL_BITFIELD objc_pq_context : 1; |
f05b9d93 NP |
187 | /* True if we are parsing a (potential) Objective-C foreach |
188 | statement. This is set to true after we parsed 'for (' and while | |
189 | we wait for 'in' or ';' to decide if it's a standard C for loop or an | |
190 | Objective-C foreach loop. */ | |
191 | BOOL_BITFIELD objc_could_be_foreach_context : 1; | |
0bacb8c7 TT |
192 | /* The following flag is needed to contextualize Objective-C lexical |
193 | analysis. In some cases (e.g., 'int NSObject;'), it is | |
194 | undesirable to bind an identifier to an Objective-C class, even | |
195 | if a class with that name exists. */ | |
196 | BOOL_BITFIELD objc_need_raw_identifier : 1; | |
0a35513e AH |
197 | /* Nonzero if we're processing a __transaction statement. The value |
198 | is 1 | TM_STMT_ATTR_*. */ | |
199 | unsigned int in_transaction : 4; | |
668ea4b1 IS |
200 | /* True if we are in a context where the Objective-C "Property attribute" |
201 | keywords are valid. */ | |
202 | BOOL_BITFIELD objc_property_attr_context : 1; | |
27bf414c JM |
203 | } c_parser; |
204 | ||
bc4071dd RH |
205 | |
206 | /* The actual parser and external interface. ??? Does this need to be | |
207 | garbage-collected? */ | |
208 | ||
209 | static GTY (()) c_parser *the_parser; | |
210 | ||
27bf414c JM |
211 | /* Read in and lex a single token, storing it in *TOKEN. */ |
212 | ||
213 | static void | |
0bacb8c7 | 214 | c_lex_one_token (c_parser *parser, c_token *token) |
27bf414c JM |
215 | { |
216 | timevar_push (TV_LEX); | |
bc4071dd | 217 | |
46c2514e TT |
218 | token->type = c_lex_with_flags (&token->value, &token->location, NULL, |
219 | (parser->lex_untranslated_string | |
220 | ? C_LEX_STRING_NO_TRANSLATE : 0)); | |
bc4071dd RH |
221 | token->id_kind = C_ID_NONE; |
222 | token->keyword = RID_MAX; | |
223 | token->pragma_kind = PRAGMA_NONE; | |
bc4071dd | 224 | |
27bf414c JM |
225 | switch (token->type) |
226 | { | |
227 | case CPP_NAME: | |
27bf414c JM |
228 | { |
229 | tree decl; | |
230 | ||
0bacb8c7 TT |
231 | bool objc_force_identifier = parser->objc_need_raw_identifier; |
232 | if (c_dialect_objc ()) | |
233 | parser->objc_need_raw_identifier = false; | |
27bf414c JM |
234 | |
235 | if (C_IS_RESERVED_WORD (token->value)) | |
236 | { | |
237 | enum rid rid_code = C_RID_CODE (token->value); | |
238 | ||
eea1139b ILT |
239 | if (rid_code == RID_CXX_COMPAT_WARN) |
240 | { | |
3ba09659 AH |
241 | warning_at (token->location, |
242 | OPT_Wc___compat, | |
88388a52 JM |
243 | "identifier %qE conflicts with C++ keyword", |
244 | token->value); | |
eea1139b | 245 | } |
36c5e70a BE |
246 | else if (rid_code >= RID_FIRST_ADDR_SPACE |
247 | && rid_code <= RID_LAST_ADDR_SPACE) | |
248 | { | |
249 | token->id_kind = C_ID_ADDRSPACE; | |
250 | token->keyword = rid_code; | |
251 | break; | |
252 | } | |
1973201f | 253 | else if (c_dialect_objc () && OBJC_IS_PQ_KEYWORD (rid_code)) |
27bf414c | 254 | { |
1973201f NP |
255 | /* We found an Objective-C "pq" keyword (in, out, |
256 | inout, bycopy, byref, oneway). They need special | |
257 | care because the interpretation depends on the | |
d853ee42 | 258 | context. */ |
1973201f | 259 | if (parser->objc_pq_context) |
27bf414c | 260 | { |
27bf414c JM |
261 | token->type = CPP_KEYWORD; |
262 | token->keyword = rid_code; | |
263 | break; | |
264 | } | |
f05b9d93 NP |
265 | else if (parser->objc_could_be_foreach_context |
266 | && rid_code == RID_IN) | |
267 | { | |
268 | /* We are in Objective-C, inside a (potential) | |
269 | foreach context (which means after having | |
270 | parsed 'for (', but before having parsed ';'), | |
271 | and we found 'in'. We consider it the keyword | |
272 | which terminates the declaration at the | |
273 | beginning of a foreach-statement. Note that | |
274 | this means you can't use 'in' for anything else | |
275 | in that context; in particular, in Objective-C | |
276 | you can't use 'in' as the name of the running | |
277 | variable in a C for loop. We could potentially | |
278 | try to add code here to disambiguate, but it | |
d853ee42 | 279 | seems a reasonable limitation. */ |
f05b9d93 NP |
280 | token->type = CPP_KEYWORD; |
281 | token->keyword = rid_code; | |
282 | break; | |
283 | } | |
1973201f NP |
284 | /* Else, "pq" keywords outside of the "pq" context are |
285 | not keywords, and we fall through to the code for | |
d853ee42 | 286 | normal tokens. */ |
1973201f | 287 | } |
668ea4b1 IS |
288 | else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code)) |
289 | { | |
d853ee42 NP |
290 | /* We found an Objective-C "property attribute" |
291 | keyword (getter, setter, readonly, etc). These are | |
668ea4b1 IS |
292 | only valid in the property context. */ |
293 | if (parser->objc_property_attr_context) | |
294 | { | |
295 | token->type = CPP_KEYWORD; | |
296 | token->keyword = rid_code; | |
297 | break; | |
298 | } | |
299 | /* Else they are not special keywords. | |
300 | */ | |
301 | } | |
1973201f NP |
302 | else if (c_dialect_objc () |
303 | && (OBJC_IS_AT_KEYWORD (rid_code) | |
304 | || OBJC_IS_CXX_KEYWORD (rid_code))) | |
305 | { | |
306 | /* We found one of the Objective-C "@" keywords (defs, | |
307 | selector, synchronized, etc) or one of the | |
308 | Objective-C "cxx" keywords (class, private, | |
309 | protected, public, try, catch, throw) without a | |
310 | preceding '@' sign. Do nothing and fall through to | |
311 | the code for normal tokens (in C++ we would still | |
d853ee42 | 312 | consider the CXX ones keywords, but not in C). */ |
1973201f | 313 | ; |
27bf414c JM |
314 | } |
315 | else | |
316 | { | |
27bf414c JM |
317 | token->type = CPP_KEYWORD; |
318 | token->keyword = rid_code; | |
319 | break; | |
320 | } | |
321 | } | |
322 | ||
323 | decl = lookup_name (token->value); | |
324 | if (decl) | |
325 | { | |
326 | if (TREE_CODE (decl) == TYPE_DECL) | |
327 | { | |
328 | token->id_kind = C_ID_TYPENAME; | |
329 | break; | |
330 | } | |
331 | } | |
332 | else if (c_dialect_objc ()) | |
333 | { | |
334 | tree objc_interface_decl = objc_is_class_name (token->value); | |
335 | /* Objective-C class names are in the same namespace as | |
336 | variables and typedefs, and hence are shadowed by local | |
337 | declarations. */ | |
338 | if (objc_interface_decl | |
0d8a2528 | 339 | && (!objc_force_identifier || global_bindings_p ())) |
27bf414c JM |
340 | { |
341 | token->value = objc_interface_decl; | |
342 | token->id_kind = C_ID_CLASSNAME; | |
343 | break; | |
344 | } | |
345 | } | |
bc4071dd | 346 | token->id_kind = C_ID_ID; |
27bf414c | 347 | } |
27bf414c JM |
348 | break; |
349 | case CPP_AT_NAME: | |
350 | /* This only happens in Objective-C; it must be a keyword. */ | |
351 | token->type = CPP_KEYWORD; | |
49b91f05 NP |
352 | switch (C_RID_CODE (token->value)) |
353 | { | |
354 | /* Replace 'class' with '@class', 'private' with '@private', | |
355 | etc. This prevents confusion with the C++ keyword | |
356 | 'class', and makes the tokens consistent with other | |
357 | Objective-C 'AT' keywords. For example '@class' is | |
358 | reported as RID_AT_CLASS which is consistent with | |
359 | '@synchronized', which is reported as | |
360 | RID_AT_SYNCHRONIZED. | |
361 | */ | |
362 | case RID_CLASS: token->keyword = RID_AT_CLASS; break; | |
363 | case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break; | |
364 | case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break; | |
365 | case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break; | |
366 | case RID_THROW: token->keyword = RID_AT_THROW; break; | |
367 | case RID_TRY: token->keyword = RID_AT_TRY; break; | |
368 | case RID_CATCH: token->keyword = RID_AT_CATCH; break; | |
369 | default: token->keyword = C_RID_CODE (token->value); | |
370 | } | |
27bf414c JM |
371 | break; |
372 | case CPP_COLON: | |
373 | case CPP_COMMA: | |
374 | case CPP_CLOSE_PAREN: | |
375 | case CPP_SEMICOLON: | |
376 | /* These tokens may affect the interpretation of any identifiers | |
377 | following, if doing Objective-C. */ | |
0bacb8c7 TT |
378 | if (c_dialect_objc ()) |
379 | parser->objc_need_raw_identifier = false; | |
bc4071dd RH |
380 | break; |
381 | case CPP_PRAGMA: | |
382 | /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */ | |
d75d71e0 | 383 | token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value); |
bc4071dd | 384 | token->value = NULL; |
27bf414c JM |
385 | break; |
386 | default: | |
27bf414c JM |
387 | break; |
388 | } | |
389 | timevar_pop (TV_LEX); | |
390 | } | |
391 | ||
392 | /* Return a pointer to the next token from PARSER, reading it in if | |
393 | necessary. */ | |
394 | ||
395 | static inline c_token * | |
396 | c_parser_peek_token (c_parser *parser) | |
397 | { | |
398 | if (parser->tokens_avail == 0) | |
399 | { | |
0bacb8c7 | 400 | c_lex_one_token (parser, &parser->tokens[0]); |
27bf414c JM |
401 | parser->tokens_avail = 1; |
402 | } | |
403 | return &parser->tokens[0]; | |
404 | } | |
405 | ||
406 | /* Return true if the next token from PARSER has the indicated | |
407 | TYPE. */ | |
408 | ||
409 | static inline bool | |
410 | c_parser_next_token_is (c_parser *parser, enum cpp_ttype type) | |
411 | { | |
412 | return c_parser_peek_token (parser)->type == type; | |
413 | } | |
414 | ||
415 | /* Return true if the next token from PARSER does not have the | |
416 | indicated TYPE. */ | |
417 | ||
418 | static inline bool | |
419 | c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type) | |
420 | { | |
421 | return !c_parser_next_token_is (parser, type); | |
422 | } | |
423 | ||
424 | /* Return true if the next token from PARSER is the indicated | |
425 | KEYWORD. */ | |
426 | ||
427 | static inline bool | |
428 | c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword) | |
429 | { | |
dbc518f0 | 430 | return c_parser_peek_token (parser)->keyword == keyword; |
27bf414c JM |
431 | } |
432 | ||
29ce73cb PB |
433 | /* Return a pointer to the next-but-one token from PARSER, reading it |
434 | in if necessary. The next token is already read in. */ | |
435 | ||
436 | static c_token * | |
437 | c_parser_peek_2nd_token (c_parser *parser) | |
438 | { | |
439 | if (parser->tokens_avail >= 2) | |
440 | return &parser->tokens[1]; | |
441 | gcc_assert (parser->tokens_avail == 1); | |
442 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
443 | gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL); | |
444 | c_lex_one_token (parser, &parser->tokens[1]); | |
445 | parser->tokens_avail = 2; | |
446 | return &parser->tokens[1]; | |
447 | } | |
448 | ||
27bf414c JM |
449 | /* Return true if TOKEN can start a type name, |
450 | false otherwise. */ | |
451 | static bool | |
452 | c_token_starts_typename (c_token *token) | |
453 | { | |
454 | switch (token->type) | |
455 | { | |
456 | case CPP_NAME: | |
457 | switch (token->id_kind) | |
458 | { | |
459 | case C_ID_ID: | |
460 | return false; | |
36c5e70a BE |
461 | case C_ID_ADDRSPACE: |
462 | return true; | |
27bf414c JM |
463 | case C_ID_TYPENAME: |
464 | return true; | |
465 | case C_ID_CLASSNAME: | |
466 | gcc_assert (c_dialect_objc ()); | |
467 | return true; | |
468 | default: | |
469 | gcc_unreachable (); | |
470 | } | |
471 | case CPP_KEYWORD: | |
472 | switch (token->keyword) | |
473 | { | |
474 | case RID_UNSIGNED: | |
475 | case RID_LONG: | |
a6766312 | 476 | case RID_INT128: |
27bf414c JM |
477 | case RID_SHORT: |
478 | case RID_SIGNED: | |
479 | case RID_COMPLEX: | |
480 | case RID_INT: | |
481 | case RID_CHAR: | |
482 | case RID_FLOAT: | |
483 | case RID_DOUBLE: | |
484 | case RID_VOID: | |
9a8ce21f JG |
485 | case RID_DFLOAT32: |
486 | case RID_DFLOAT64: | |
487 | case RID_DFLOAT128: | |
27bf414c JM |
488 | case RID_BOOL: |
489 | case RID_ENUM: | |
490 | case RID_STRUCT: | |
491 | case RID_UNION: | |
492 | case RID_TYPEOF: | |
493 | case RID_CONST: | |
494 | case RID_VOLATILE: | |
495 | case RID_RESTRICT: | |
496 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
497 | case RID_FRACT: |
498 | case RID_ACCUM: | |
499 | case RID_SAT: | |
27bf414c JM |
500 | return true; |
501 | default: | |
502 | return false; | |
503 | } | |
504 | case CPP_LESS: | |
505 | if (c_dialect_objc ()) | |
506 | return true; | |
507 | return false; | |
508 | default: | |
509 | return false; | |
510 | } | |
511 | } | |
512 | ||
29ce73cb PB |
513 | enum c_lookahead_kind { |
514 | /* Always treat unknown identifiers as typenames. */ | |
515 | cla_prefer_type, | |
516 | ||
517 | /* Could be parsing a nonabstract declarator. Only treat an identifier | |
518 | as a typename if followed by another identifier or a star. */ | |
519 | cla_nonabstract_decl, | |
520 | ||
521 | /* Never treat identifiers as typenames. */ | |
522 | cla_prefer_id | |
523 | }; | |
524 | ||
27bf414c | 525 | /* Return true if the next token from PARSER can start a type name, |
29ce73cb PB |
526 | false otherwise. LA specifies how to do lookahead in order to |
527 | detect unknown type names. If unsure, pick CLA_PREFER_ID. */ | |
528 | ||
27bf414c | 529 | static inline bool |
29ce73cb | 530 | c_parser_next_tokens_start_typename (c_parser *parser, enum c_lookahead_kind la) |
27bf414c JM |
531 | { |
532 | c_token *token = c_parser_peek_token (parser); | |
29ce73cb PB |
533 | if (c_token_starts_typename (token)) |
534 | return true; | |
535 | ||
536 | /* Try a bit harder to detect an unknown typename. */ | |
537 | if (la != cla_prefer_id | |
538 | && token->type == CPP_NAME | |
539 | && token->id_kind == C_ID_ID | |
540 | ||
541 | /* Do not try too hard when we could have "object in array". */ | |
542 | && !parser->objc_could_be_foreach_context | |
543 | ||
544 | && (la == cla_prefer_type | |
545 | || c_parser_peek_2nd_token (parser)->type == CPP_NAME | |
546 | || c_parser_peek_2nd_token (parser)->type == CPP_MULT) | |
547 | ||
548 | /* Only unknown identifiers. */ | |
549 | && !lookup_name (token->value)) | |
550 | return true; | |
551 | ||
552 | return false; | |
27bf414c JM |
553 | } |
554 | ||
f725e721 PB |
555 | /* Return true if TOKEN is a type qualifier, false otherwise. */ |
556 | static bool | |
557 | c_token_is_qualifier (c_token *token) | |
558 | { | |
559 | switch (token->type) | |
560 | { | |
561 | case CPP_NAME: | |
562 | switch (token->id_kind) | |
563 | { | |
564 | case C_ID_ADDRSPACE: | |
565 | return true; | |
566 | default: | |
567 | return false; | |
568 | } | |
569 | case CPP_KEYWORD: | |
570 | switch (token->keyword) | |
571 | { | |
572 | case RID_CONST: | |
573 | case RID_VOLATILE: | |
574 | case RID_RESTRICT: | |
575 | case RID_ATTRIBUTE: | |
576 | return true; | |
577 | default: | |
578 | return false; | |
579 | } | |
580 | case CPP_LESS: | |
581 | return false; | |
582 | default: | |
583 | gcc_unreachable (); | |
584 | } | |
585 | } | |
586 | ||
587 | /* Return true if the next token from PARSER is a type qualifier, | |
588 | false otherwise. */ | |
589 | static inline bool | |
590 | c_parser_next_token_is_qualifier (c_parser *parser) | |
591 | { | |
592 | c_token *token = c_parser_peek_token (parser); | |
593 | return c_token_is_qualifier (token); | |
594 | } | |
595 | ||
27bf414c JM |
596 | /* Return true if TOKEN can start declaration specifiers, false |
597 | otherwise. */ | |
598 | static bool | |
599 | c_token_starts_declspecs (c_token *token) | |
600 | { | |
601 | switch (token->type) | |
602 | { | |
603 | case CPP_NAME: | |
604 | switch (token->id_kind) | |
605 | { | |
606 | case C_ID_ID: | |
607 | return false; | |
36c5e70a BE |
608 | case C_ID_ADDRSPACE: |
609 | return true; | |
27bf414c JM |
610 | case C_ID_TYPENAME: |
611 | return true; | |
612 | case C_ID_CLASSNAME: | |
613 | gcc_assert (c_dialect_objc ()); | |
614 | return true; | |
615 | default: | |
616 | gcc_unreachable (); | |
617 | } | |
618 | case CPP_KEYWORD: | |
619 | switch (token->keyword) | |
620 | { | |
621 | case RID_STATIC: | |
622 | case RID_EXTERN: | |
623 | case RID_REGISTER: | |
624 | case RID_TYPEDEF: | |
625 | case RID_INLINE: | |
bbceee64 | 626 | case RID_NORETURN: |
27bf414c JM |
627 | case RID_AUTO: |
628 | case RID_THREAD: | |
629 | case RID_UNSIGNED: | |
630 | case RID_LONG: | |
a6766312 | 631 | case RID_INT128: |
27bf414c JM |
632 | case RID_SHORT: |
633 | case RID_SIGNED: | |
634 | case RID_COMPLEX: | |
635 | case RID_INT: | |
636 | case RID_CHAR: | |
637 | case RID_FLOAT: | |
638 | case RID_DOUBLE: | |
639 | case RID_VOID: | |
9a8ce21f JG |
640 | case RID_DFLOAT32: |
641 | case RID_DFLOAT64: | |
642 | case RID_DFLOAT128: | |
27bf414c JM |
643 | case RID_BOOL: |
644 | case RID_ENUM: | |
645 | case RID_STRUCT: | |
646 | case RID_UNION: | |
647 | case RID_TYPEOF: | |
648 | case RID_CONST: | |
649 | case RID_VOLATILE: | |
650 | case RID_RESTRICT: | |
651 | case RID_ATTRIBUTE: | |
ab22c1fa CF |
652 | case RID_FRACT: |
653 | case RID_ACCUM: | |
654 | case RID_SAT: | |
d19fa6b5 | 655 | case RID_ALIGNAS: |
27bf414c JM |
656 | return true; |
657 | default: | |
658 | return false; | |
659 | } | |
660 | case CPP_LESS: | |
661 | if (c_dialect_objc ()) | |
662 | return true; | |
663 | return false; | |
664 | default: | |
665 | return false; | |
666 | } | |
667 | } | |
668 | ||
32912286 JM |
669 | |
670 | /* Return true if TOKEN can start declaration specifiers or a static | |
671 | assertion, false otherwise. */ | |
672 | static bool | |
673 | c_token_starts_declaration (c_token *token) | |
674 | { | |
675 | if (c_token_starts_declspecs (token) | |
676 | || token->keyword == RID_STATIC_ASSERT) | |
677 | return true; | |
678 | else | |
679 | return false; | |
680 | } | |
681 | ||
27bf414c JM |
682 | /* Return true if the next token from PARSER can start declaration |
683 | specifiers, false otherwise. */ | |
684 | static inline bool | |
685 | c_parser_next_token_starts_declspecs (c_parser *parser) | |
686 | { | |
687 | c_token *token = c_parser_peek_token (parser); | |
bede2adc NP |
688 | |
689 | /* In Objective-C, a classname normally starts a declspecs unless it | |
690 | is immediately followed by a dot. In that case, it is the | |
691 | Objective-C 2.0 "dot-syntax" for class objects, ie, calls the | |
692 | setter/getter on the class. c_token_starts_declspecs() can't | |
693 | differentiate between the two cases because it only checks the | |
694 | current token, so we have a special check here. */ | |
695 | if (c_dialect_objc () | |
696 | && token->type == CPP_NAME | |
697 | && token->id_kind == C_ID_CLASSNAME | |
698 | && c_parser_peek_2nd_token (parser)->type == CPP_DOT) | |
699 | return false; | |
700 | ||
27bf414c JM |
701 | return c_token_starts_declspecs (token); |
702 | } | |
703 | ||
2f413185 | 704 | /* Return true if the next tokens from PARSER can start declaration |
32912286 JM |
705 | specifiers or a static assertion, false otherwise. */ |
706 | static inline bool | |
2f413185 | 707 | c_parser_next_tokens_start_declaration (c_parser *parser) |
32912286 JM |
708 | { |
709 | c_token *token = c_parser_peek_token (parser); | |
bede2adc NP |
710 | |
711 | /* Same as above. */ | |
712 | if (c_dialect_objc () | |
713 | && token->type == CPP_NAME | |
714 | && token->id_kind == C_ID_CLASSNAME | |
715 | && c_parser_peek_2nd_token (parser)->type == CPP_DOT) | |
716 | return false; | |
717 | ||
2f413185 PB |
718 | /* Labels do not start declarations. */ |
719 | if (token->type == CPP_NAME | |
720 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
721 | return false; | |
722 | ||
723 | if (c_token_starts_declaration (token)) | |
724 | return true; | |
725 | ||
29ce73cb | 726 | if (c_parser_next_tokens_start_typename (parser, cla_nonabstract_decl)) |
2f413185 PB |
727 | return true; |
728 | ||
729 | return false; | |
32912286 JM |
730 | } |
731 | ||
27bf414c JM |
732 | /* Consume the next token from PARSER. */ |
733 | ||
734 | static void | |
735 | c_parser_consume_token (c_parser *parser) | |
736 | { | |
bc4071dd RH |
737 | gcc_assert (parser->tokens_avail >= 1); |
738 | gcc_assert (parser->tokens[0].type != CPP_EOF); | |
739 | gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL); | |
740 | gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA); | |
27bf414c JM |
741 | if (parser->tokens_avail == 2) |
742 | parser->tokens[0] = parser->tokens[1]; | |
27bf414c JM |
743 | parser->tokens_avail--; |
744 | } | |
745 | ||
bc4071dd RH |
746 | /* Expect the current token to be a #pragma. Consume it and remember |
747 | that we've begun parsing a pragma. */ | |
748 | ||
749 | static void | |
750 | c_parser_consume_pragma (c_parser *parser) | |
751 | { | |
752 | gcc_assert (!parser->in_pragma); | |
753 | gcc_assert (parser->tokens_avail >= 1); | |
754 | gcc_assert (parser->tokens[0].type == CPP_PRAGMA); | |
755 | if (parser->tokens_avail == 2) | |
756 | parser->tokens[0] = parser->tokens[1]; | |
757 | parser->tokens_avail--; | |
758 | parser->in_pragma = true; | |
759 | } | |
760 | ||
27bf414c JM |
761 | /* Update the globals input_location and in_system_header from |
762 | TOKEN. */ | |
763 | static inline void | |
764 | c_parser_set_source_position_from_token (c_token *token) | |
765 | { | |
766 | if (token->type != CPP_EOF) | |
767 | { | |
768 | input_location = token->location; | |
27bf414c JM |
769 | } |
770 | } | |
771 | ||
27bf414c JM |
772 | /* Issue a diagnostic of the form |
773 | FILE:LINE: MESSAGE before TOKEN | |
774 | where TOKEN is the next token in the input stream of PARSER. | |
775 | MESSAGE (specified by the caller) is usually of the form "expected | |
776 | OTHER-TOKEN". | |
777 | ||
778 | Do not issue a diagnostic if still recovering from an error. | |
779 | ||
780 | ??? This is taken from the C++ parser, but building up messages in | |
781 | this way is not i18n-friendly and some other approach should be | |
782 | used. */ | |
783 | ||
784 | static void | |
4b794eaf | 785 | c_parser_error (c_parser *parser, const char *gmsgid) |
27bf414c JM |
786 | { |
787 | c_token *token = c_parser_peek_token (parser); | |
788 | if (parser->error) | |
789 | return; | |
790 | parser->error = true; | |
4b794eaf | 791 | if (!gmsgid) |
27bf414c JM |
792 | return; |
793 | /* This diagnostic makes more sense if it is tagged to the line of | |
794 | the token we just peeked at. */ | |
795 | c_parser_set_source_position_from_token (token); | |
4b794eaf | 796 | c_parse_error (gmsgid, |
27bf414c JM |
797 | /* Because c_parse_error does not understand |
798 | CPP_KEYWORD, keywords are treated like | |
799 | identifiers. */ | |
800 | (token->type == CPP_KEYWORD ? CPP_NAME : token->type), | |
cfc93532 MLI |
801 | /* ??? The C parser does not save the cpp flags of a |
802 | token, we need to pass 0 here and we will not get | |
803 | the source spelling of some tokens but rather the | |
804 | canonical spelling. */ | |
805 | token->value, /*flags=*/0); | |
27bf414c JM |
806 | } |
807 | ||
808 | /* If the next token is of the indicated TYPE, consume it. Otherwise, | |
809 | issue the error MSGID. If MSGID is NULL then a message has already | |
810 | been produced and no message will be produced this time. Returns | |
811 | true if found, false otherwise. */ | |
812 | ||
813 | static bool | |
814 | c_parser_require (c_parser *parser, | |
815 | enum cpp_ttype type, | |
816 | const char *msgid) | |
817 | { | |
818 | if (c_parser_next_token_is (parser, type)) | |
819 | { | |
820 | c_parser_consume_token (parser); | |
821 | return true; | |
822 | } | |
823 | else | |
824 | { | |
825 | c_parser_error (parser, msgid); | |
826 | return false; | |
827 | } | |
828 | } | |
829 | ||
830 | /* If the next token is the indicated keyword, consume it. Otherwise, | |
831 | issue the error MSGID. Returns true if found, false otherwise. */ | |
832 | ||
833 | static bool | |
834 | c_parser_require_keyword (c_parser *parser, | |
835 | enum rid keyword, | |
836 | const char *msgid) | |
837 | { | |
838 | if (c_parser_next_token_is_keyword (parser, keyword)) | |
839 | { | |
840 | c_parser_consume_token (parser); | |
841 | return true; | |
842 | } | |
843 | else | |
844 | { | |
845 | c_parser_error (parser, msgid); | |
846 | return false; | |
847 | } | |
848 | } | |
849 | ||
850 | /* Like c_parser_require, except that tokens will be skipped until the | |
851 | desired token is found. An error message is still produced if the | |
852 | next token is not as expected. If MSGID is NULL then a message has | |
853 | already been produced and no message will be produced this | |
854 | time. */ | |
855 | ||
856 | static void | |
857 | c_parser_skip_until_found (c_parser *parser, | |
858 | enum cpp_ttype type, | |
859 | const char *msgid) | |
860 | { | |
861 | unsigned nesting_depth = 0; | |
862 | ||
863 | if (c_parser_require (parser, type, msgid)) | |
864 | return; | |
865 | ||
866 | /* Skip tokens until the desired token is found. */ | |
867 | while (true) | |
868 | { | |
869 | /* Peek at the next token. */ | |
870 | c_token *token = c_parser_peek_token (parser); | |
871 | /* If we've reached the token we want, consume it and stop. */ | |
872 | if (token->type == type && !nesting_depth) | |
873 | { | |
874 | c_parser_consume_token (parser); | |
875 | break; | |
876 | } | |
bc4071dd | 877 | |
27bf414c JM |
878 | /* If we've run out of tokens, stop. */ |
879 | if (token->type == CPP_EOF) | |
880 | return; | |
bc4071dd RH |
881 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
882 | return; | |
27bf414c JM |
883 | if (token->type == CPP_OPEN_BRACE |
884 | || token->type == CPP_OPEN_PAREN | |
885 | || token->type == CPP_OPEN_SQUARE) | |
886 | ++nesting_depth; | |
887 | else if (token->type == CPP_CLOSE_BRACE | |
888 | || token->type == CPP_CLOSE_PAREN | |
889 | || token->type == CPP_CLOSE_SQUARE) | |
890 | { | |
891 | if (nesting_depth-- == 0) | |
892 | break; | |
893 | } | |
894 | /* Consume this token. */ | |
895 | c_parser_consume_token (parser); | |
896 | } | |
897 | parser->error = false; | |
898 | } | |
899 | ||
900 | /* Skip tokens until the end of a parameter is found, but do not | |
901 | consume the comma, semicolon or closing delimiter. */ | |
902 | ||
903 | static void | |
904 | c_parser_skip_to_end_of_parameter (c_parser *parser) | |
905 | { | |
906 | unsigned nesting_depth = 0; | |
907 | ||
908 | while (true) | |
909 | { | |
910 | c_token *token = c_parser_peek_token (parser); | |
911 | if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON) | |
912 | && !nesting_depth) | |
913 | break; | |
914 | /* If we've run out of tokens, stop. */ | |
915 | if (token->type == CPP_EOF) | |
916 | return; | |
bc4071dd RH |
917 | if (token->type == CPP_PRAGMA_EOL && parser->in_pragma) |
918 | return; | |
27bf414c JM |
919 | if (token->type == CPP_OPEN_BRACE |
920 | || token->type == CPP_OPEN_PAREN | |
921 | || token->type == CPP_OPEN_SQUARE) | |
922 | ++nesting_depth; | |
923 | else if (token->type == CPP_CLOSE_BRACE | |
924 | || token->type == CPP_CLOSE_PAREN | |
925 | || token->type == CPP_CLOSE_SQUARE) | |
926 | { | |
927 | if (nesting_depth-- == 0) | |
928 | break; | |
929 | } | |
930 | /* Consume this token. */ | |
931 | c_parser_consume_token (parser); | |
932 | } | |
933 | parser->error = false; | |
934 | } | |
935 | ||
bc4071dd RH |
936 | /* Expect to be at the end of the pragma directive and consume an |
937 | end of line marker. */ | |
938 | ||
939 | static void | |
940 | c_parser_skip_to_pragma_eol (c_parser *parser) | |
941 | { | |
942 | gcc_assert (parser->in_pragma); | |
943 | parser->in_pragma = false; | |
944 | ||
945 | if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line")) | |
946 | while (true) | |
947 | { | |
948 | c_token *token = c_parser_peek_token (parser); | |
949 | if (token->type == CPP_EOF) | |
950 | break; | |
951 | if (token->type == CPP_PRAGMA_EOL) | |
952 | { | |
953 | c_parser_consume_token (parser); | |
954 | break; | |
955 | } | |
956 | c_parser_consume_token (parser); | |
957 | } | |
958 | ||
959 | parser->error = false; | |
960 | } | |
27bf414c | 961 | |
2a83cc52 RH |
962 | /* Skip tokens until we have consumed an entire block, or until we |
963 | have consumed a non-nested ';'. */ | |
964 | ||
965 | static void | |
966 | c_parser_skip_to_end_of_block_or_statement (c_parser *parser) | |
967 | { | |
968 | unsigned nesting_depth = 0; | |
969 | bool save_error = parser->error; | |
970 | ||
971 | while (true) | |
972 | { | |
973 | c_token *token; | |
974 | ||
975 | /* Peek at the next token. */ | |
976 | token = c_parser_peek_token (parser); | |
977 | ||
978 | switch (token->type) | |
979 | { | |
980 | case CPP_EOF: | |
981 | return; | |
982 | ||
983 | case CPP_PRAGMA_EOL: | |
984 | if (parser->in_pragma) | |
985 | return; | |
986 | break; | |
987 | ||
988 | case CPP_SEMICOLON: | |
989 | /* If the next token is a ';', we have reached the | |
990 | end of the statement. */ | |
991 | if (!nesting_depth) | |
992 | { | |
993 | /* Consume the ';'. */ | |
994 | c_parser_consume_token (parser); | |
995 | goto finished; | |
996 | } | |
997 | break; | |
998 | ||
999 | case CPP_CLOSE_BRACE: | |
1000 | /* If the next token is a non-nested '}', then we have | |
1001 | reached the end of the current block. */ | |
1002 | if (nesting_depth == 0 || --nesting_depth == 0) | |
1003 | { | |
1004 | c_parser_consume_token (parser); | |
1005 | goto finished; | |
1006 | } | |
1007 | break; | |
1008 | ||
1009 | case CPP_OPEN_BRACE: | |
1010 | /* If it the next token is a '{', then we are entering a new | |
1011 | block. Consume the entire block. */ | |
1012 | ++nesting_depth; | |
1013 | break; | |
1014 | ||
1015 | case CPP_PRAGMA: | |
1016 | /* If we see a pragma, consume the whole thing at once. We | |
1017 | have some safeguards against consuming pragmas willy-nilly. | |
1018 | Normally, we'd expect to be here with parser->error set, | |
1019 | which disables these safeguards. But it's possible to get | |
1020 | here for secondary error recovery, after parser->error has | |
1021 | been cleared. */ | |
1022 | c_parser_consume_pragma (parser); | |
1023 | c_parser_skip_to_pragma_eol (parser); | |
1024 | parser->error = save_error; | |
1025 | continue; | |
9e33de05 RS |
1026 | |
1027 | default: | |
1028 | break; | |
2a83cc52 RH |
1029 | } |
1030 | ||
1031 | c_parser_consume_token (parser); | |
1032 | } | |
1033 | ||
1034 | finished: | |
1035 | parser->error = false; | |
1036 | } | |
1037 | ||
d2e796ad MLI |
1038 | /* CPP's options (initialized by c-opts.c). */ |
1039 | extern cpp_options *cpp_opts; | |
1040 | ||
27bf414c JM |
1041 | /* Save the warning flags which are controlled by __extension__. */ |
1042 | ||
1043 | static inline int | |
1044 | disable_extension_diagnostics (void) | |
1045 | { | |
1046 | int ret = (pedantic | |
1047 | | (warn_pointer_arith << 1) | |
1048 | | (warn_traditional << 2) | |
d2e796ad | 1049 | | (flag_iso << 3) |
24b97832 | 1050 | | (warn_long_long << 4) |
b3ab9ea2 TT |
1051 | | (warn_cxx_compat << 5) |
1052 | | (warn_overlength_strings << 6)); | |
e3339d0f | 1053 | cpp_opts->cpp_pedantic = pedantic = 0; |
27bf414c | 1054 | warn_pointer_arith = 0; |
e3339d0f | 1055 | cpp_opts->cpp_warn_traditional = warn_traditional = 0; |
27bf414c | 1056 | flag_iso = 0; |
e3339d0f | 1057 | cpp_opts->cpp_warn_long_long = warn_long_long = 0; |
24b97832 | 1058 | warn_cxx_compat = 0; |
b3ab9ea2 | 1059 | warn_overlength_strings = 0; |
27bf414c JM |
1060 | return ret; |
1061 | } | |
1062 | ||
1063 | /* Restore the warning flags which are controlled by __extension__. | |
1064 | FLAGS is the return value from disable_extension_diagnostics. */ | |
1065 | ||
1066 | static inline void | |
1067 | restore_extension_diagnostics (int flags) | |
1068 | { | |
e3339d0f | 1069 | cpp_opts->cpp_pedantic = pedantic = flags & 1; |
27bf414c | 1070 | warn_pointer_arith = (flags >> 1) & 1; |
e3339d0f | 1071 | cpp_opts->cpp_warn_traditional = warn_traditional = (flags >> 2) & 1; |
27bf414c | 1072 | flag_iso = (flags >> 3) & 1; |
e3339d0f | 1073 | cpp_opts->cpp_warn_long_long = warn_long_long = (flags >> 4) & 1; |
24b97832 | 1074 | warn_cxx_compat = (flags >> 5) & 1; |
b3ab9ea2 | 1075 | warn_overlength_strings = (flags >> 6) & 1; |
27bf414c JM |
1076 | } |
1077 | ||
1078 | /* Possibly kinds of declarator to parse. */ | |
1079 | typedef enum c_dtr_syn { | |
1080 | /* A normal declarator with an identifier. */ | |
1081 | C_DTR_NORMAL, | |
1082 | /* An abstract declarator (maybe empty). */ | |
1083 | C_DTR_ABSTRACT, | |
1084 | /* A parameter declarator: may be either, but after a type name does | |
1085 | not redeclare a typedef name as an identifier if it can | |
1086 | alternatively be interpreted as a typedef name; see DR#009, | |
1087 | applied in C90 TC1, omitted from C99 and reapplied in C99 TC2 | |
1088 | following DR#249. For example, given a typedef T, "int T" and | |
1089 | "int *T" are valid parameter declarations redeclaring T, while | |
1090 | "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are | |
1091 | abstract declarators rather than involving redundant parentheses; | |
1092 | the same applies with attributes inside the parentheses before | |
1093 | "T". */ | |
1094 | C_DTR_PARM | |
1095 | } c_dtr_syn; | |
1096 | ||
20906c66 JJ |
1097 | /* The binary operation precedence levels, where 0 is a dummy lowest level |
1098 | used for the bottom of the stack. */ | |
1099 | enum c_parser_prec { | |
1100 | PREC_NONE, | |
1101 | PREC_LOGOR, | |
1102 | PREC_LOGAND, | |
1103 | PREC_BITOR, | |
1104 | PREC_BITXOR, | |
1105 | PREC_BITAND, | |
1106 | PREC_EQ, | |
1107 | PREC_REL, | |
1108 | PREC_SHIFT, | |
1109 | PREC_ADD, | |
1110 | PREC_MULT, | |
1111 | NUM_PRECS | |
1112 | }; | |
1113 | ||
27bf414c JM |
1114 | static void c_parser_external_declaration (c_parser *); |
1115 | static void c_parser_asm_definition (c_parser *); | |
32912286 | 1116 | static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool, |
f05b9d93 | 1117 | bool, bool, tree *); |
32912286 JM |
1118 | static void c_parser_static_assert_declaration_no_semi (c_parser *); |
1119 | static void c_parser_static_assert_declaration (c_parser *); | |
27bf414c | 1120 | static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool, |
29ce73cb | 1121 | bool, enum c_lookahead_kind); |
27bf414c JM |
1122 | static struct c_typespec c_parser_enum_specifier (c_parser *); |
1123 | static struct c_typespec c_parser_struct_or_union_specifier (c_parser *); | |
1124 | static tree c_parser_struct_declaration (c_parser *); | |
1125 | static struct c_typespec c_parser_typeof_specifier (c_parser *); | |
d19fa6b5 | 1126 | static tree c_parser_alignas_specifier (c_parser *); |
27bf414c JM |
1127 | static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn, |
1128 | bool *); | |
1129 | static struct c_declarator *c_parser_direct_declarator (c_parser *, bool, | |
1130 | c_dtr_syn, bool *); | |
1131 | static struct c_declarator *c_parser_direct_declarator_inner (c_parser *, | |
1132 | bool, | |
1133 | struct c_declarator *); | |
1134 | static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree); | |
a04a722b JM |
1135 | static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree, |
1136 | tree); | |
27bf414c JM |
1137 | static struct c_parm *c_parser_parameter_declaration (c_parser *, tree); |
1138 | static tree c_parser_simple_asm_expr (c_parser *); | |
1139 | static tree c_parser_attributes (c_parser *); | |
1140 | static struct c_type_name *c_parser_type_name (c_parser *); | |
1141 | static struct c_expr c_parser_initializer (c_parser *); | |
1142 | static struct c_expr c_parser_braced_init (c_parser *, tree, bool); | |
a1e3b3d9 LB |
1143 | static void c_parser_initelt (c_parser *, struct obstack *); |
1144 | static void c_parser_initval (c_parser *, struct c_expr *, | |
1145 | struct obstack *); | |
27bf414c JM |
1146 | static tree c_parser_compound_statement (c_parser *); |
1147 | static void c_parser_compound_statement_nostart (c_parser *); | |
1148 | static void c_parser_label (c_parser *); | |
1149 | static void c_parser_statement (c_parser *); | |
1150 | static void c_parser_statement_after_labels (c_parser *); | |
1151 | static void c_parser_if_statement (c_parser *); | |
1152 | static void c_parser_switch_statement (c_parser *); | |
1153 | static void c_parser_while_statement (c_parser *); | |
1154 | static void c_parser_do_statement (c_parser *); | |
1155 | static void c_parser_for_statement (c_parser *); | |
1156 | static tree c_parser_asm_statement (c_parser *); | |
46bdb9cf | 1157 | static tree c_parser_asm_operands (c_parser *, bool); |
1c384bf1 | 1158 | static tree c_parser_asm_goto_operands (c_parser *); |
27bf414c JM |
1159 | static tree c_parser_asm_clobbers (c_parser *); |
1160 | static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *); | |
1161 | static struct c_expr c_parser_conditional_expression (c_parser *, | |
1162 | struct c_expr *); | |
20906c66 JJ |
1163 | static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *, |
1164 | enum c_parser_prec); | |
27bf414c JM |
1165 | static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *); |
1166 | static struct c_expr c_parser_unary_expression (c_parser *); | |
1167 | static struct c_expr c_parser_sizeof_expression (c_parser *); | |
1168 | static struct c_expr c_parser_alignof_expression (c_parser *); | |
1169 | static struct c_expr c_parser_postfix_expression (c_parser *); | |
1170 | static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *, | |
24b97832 ILT |
1171 | struct c_type_name *, |
1172 | location_t); | |
27bf414c | 1173 | static struct c_expr c_parser_postfix_expression_after_primary (c_parser *, |
c2255bc4 | 1174 | location_t loc, |
27bf414c | 1175 | struct c_expr); |
0a35513e AH |
1176 | static tree c_parser_transaction (c_parser *, enum rid); |
1177 | static struct c_expr c_parser_transaction_expression (c_parser *, enum rid); | |
1178 | static tree c_parser_transaction_cancel (c_parser *); | |
27bf414c | 1179 | static struct c_expr c_parser_expression (c_parser *); |
46bdb9cf | 1180 | static struct c_expr c_parser_expression_conv (c_parser *); |
bbbbb16a | 1181 | static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool, |
3a785c97 JJ |
1182 | VEC(tree,gc) **, location_t *, |
1183 | tree *); | |
953ff289 DN |
1184 | static void c_parser_omp_construct (c_parser *); |
1185 | static void c_parser_omp_threadprivate (c_parser *); | |
1186 | static void c_parser_omp_barrier (c_parser *); | |
1187 | static void c_parser_omp_flush (c_parser *); | |
a68ab351 | 1188 | static void c_parser_omp_taskwait (c_parser *); |
20906c66 | 1189 | static void c_parser_omp_taskyield (c_parser *); |
27bf414c | 1190 | |
bc4071dd RH |
1191 | enum pragma_context { pragma_external, pragma_stmt, pragma_compound }; |
1192 | static bool c_parser_pragma (c_parser *, enum pragma_context); | |
1193 | ||
27bf414c JM |
1194 | /* These Objective-C parser functions are only ever called when |
1195 | compiling Objective-C. */ | |
c165dca7 | 1196 | static void c_parser_objc_class_definition (c_parser *, tree); |
27bf414c JM |
1197 | static void c_parser_objc_class_instance_variables (c_parser *); |
1198 | static void c_parser_objc_class_declaration (c_parser *); | |
1199 | static void c_parser_objc_alias_declaration (c_parser *); | |
c165dca7 | 1200 | static void c_parser_objc_protocol_definition (c_parser *, tree); |
249a82c4 | 1201 | static bool c_parser_objc_method_type (c_parser *); |
27bf414c JM |
1202 | static void c_parser_objc_method_definition (c_parser *); |
1203 | static void c_parser_objc_methodprotolist (c_parser *); | |
1204 | static void c_parser_objc_methodproto (c_parser *); | |
a04a722b | 1205 | static tree c_parser_objc_method_decl (c_parser *, bool, tree *, tree *); |
27bf414c JM |
1206 | static tree c_parser_objc_type_name (c_parser *); |
1207 | static tree c_parser_objc_protocol_refs (c_parser *); | |
437c2322 | 1208 | static void c_parser_objc_try_catch_finally_statement (c_parser *); |
27bf414c JM |
1209 | static void c_parser_objc_synchronized_statement (c_parser *); |
1210 | static tree c_parser_objc_selector (c_parser *); | |
1211 | static tree c_parser_objc_selector_arg (c_parser *); | |
1212 | static tree c_parser_objc_receiver (c_parser *); | |
1213 | static tree c_parser_objc_message_args (c_parser *); | |
1214 | static tree c_parser_objc_keywordexpr (c_parser *); | |
f614132b | 1215 | static void c_parser_objc_at_property_declaration (c_parser *); |
da57d1b9 NP |
1216 | static void c_parser_objc_at_synthesize_declaration (c_parser *); |
1217 | static void c_parser_objc_at_dynamic_declaration (c_parser *); | |
668ea4b1 | 1218 | static bool c_parser_objc_diagnose_bad_element_prefix |
c165dca7 | 1219 | (c_parser *, struct c_declspecs *); |
27bf414c JM |
1220 | |
1221 | /* Parse a translation unit (C90 6.7, C99 6.9). | |
1222 | ||
1223 | translation-unit: | |
1224 | external-declarations | |
1225 | ||
1226 | external-declarations: | |
1227 | external-declaration | |
1228 | external-declarations external-declaration | |
1229 | ||
1230 | GNU extensions: | |
1231 | ||
1232 | translation-unit: | |
1233 | empty | |
1234 | */ | |
1235 | ||
1236 | static void | |
1237 | c_parser_translation_unit (c_parser *parser) | |
1238 | { | |
1239 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
1240 | { | |
c1771a20 | 1241 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 1242 | "ISO C forbids an empty translation unit"); |
27bf414c JM |
1243 | } |
1244 | else | |
1245 | { | |
1246 | void *obstack_position = obstack_alloc (&parser_obstack, 0); | |
6ec637a4 | 1247 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
1248 | do |
1249 | { | |
1250 | ggc_collect (); | |
1251 | c_parser_external_declaration (parser); | |
1252 | obstack_free (&parser_obstack, obstack_position); | |
1253 | } | |
1254 | while (c_parser_next_token_is_not (parser, CPP_EOF)); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | /* Parse an external declaration (C90 6.7, C99 6.9). | |
1259 | ||
1260 | external-declaration: | |
1261 | function-definition | |
1262 | declaration | |
1263 | ||
1264 | GNU extensions: | |
1265 | ||
1266 | external-declaration: | |
1267 | asm-definition | |
1268 | ; | |
1269 | __extension__ external-declaration | |
1270 | ||
1271 | Objective-C: | |
1272 | ||
1273 | external-declaration: | |
1274 | objc-class-definition | |
1275 | objc-class-declaration | |
1276 | objc-alias-declaration | |
1277 | objc-protocol-definition | |
1278 | objc-method-definition | |
1279 | @end | |
1280 | */ | |
1281 | ||
1282 | static void | |
1283 | c_parser_external_declaration (c_parser *parser) | |
1284 | { | |
1285 | int ext; | |
1286 | switch (c_parser_peek_token (parser)->type) | |
1287 | { | |
1288 | case CPP_KEYWORD: | |
1289 | switch (c_parser_peek_token (parser)->keyword) | |
1290 | { | |
1291 | case RID_EXTENSION: | |
1292 | ext = disable_extension_diagnostics (); | |
1293 | c_parser_consume_token (parser); | |
1294 | c_parser_external_declaration (parser); | |
1295 | restore_extension_diagnostics (ext); | |
1296 | break; | |
1297 | case RID_ASM: | |
1298 | c_parser_asm_definition (parser); | |
1299 | break; | |
1300 | case RID_AT_INTERFACE: | |
1301 | case RID_AT_IMPLEMENTATION: | |
1302 | gcc_assert (c_dialect_objc ()); | |
c165dca7 | 1303 | c_parser_objc_class_definition (parser, NULL_TREE); |
27bf414c | 1304 | break; |
49b91f05 | 1305 | case RID_AT_CLASS: |
27bf414c JM |
1306 | gcc_assert (c_dialect_objc ()); |
1307 | c_parser_objc_class_declaration (parser); | |
1308 | break; | |
1309 | case RID_AT_ALIAS: | |
1310 | gcc_assert (c_dialect_objc ()); | |
1311 | c_parser_objc_alias_declaration (parser); | |
1312 | break; | |
1313 | case RID_AT_PROTOCOL: | |
1314 | gcc_assert (c_dialect_objc ()); | |
c165dca7 | 1315 | c_parser_objc_protocol_definition (parser, NULL_TREE); |
27bf414c | 1316 | break; |
668ea4b1 IS |
1317 | case RID_AT_PROPERTY: |
1318 | gcc_assert (c_dialect_objc ()); | |
f614132b | 1319 | c_parser_objc_at_property_declaration (parser); |
668ea4b1 | 1320 | break; |
da57d1b9 NP |
1321 | case RID_AT_SYNTHESIZE: |
1322 | gcc_assert (c_dialect_objc ()); | |
1323 | c_parser_objc_at_synthesize_declaration (parser); | |
1324 | break; | |
1325 | case RID_AT_DYNAMIC: | |
1326 | gcc_assert (c_dialect_objc ()); | |
1327 | c_parser_objc_at_dynamic_declaration (parser); | |
1328 | break; | |
27bf414c JM |
1329 | case RID_AT_END: |
1330 | gcc_assert (c_dialect_objc ()); | |
1331 | c_parser_consume_token (parser); | |
1332 | objc_finish_implementation (); | |
1333 | break; | |
1334 | default: | |
1335 | goto decl_or_fndef; | |
1336 | } | |
1337 | break; | |
1338 | case CPP_SEMICOLON: | |
c1771a20 | 1339 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 1340 | "ISO C does not allow extra %<;%> outside of a function"); |
27bf414c JM |
1341 | c_parser_consume_token (parser); |
1342 | break; | |
bc4071dd | 1343 | case CPP_PRAGMA: |
6ec637a4 | 1344 | mark_valid_location_for_stdc_pragma (true); |
bc4071dd | 1345 | c_parser_pragma (parser, pragma_external); |
6ec637a4 | 1346 | mark_valid_location_for_stdc_pragma (false); |
bc4071dd | 1347 | break; |
27bf414c JM |
1348 | case CPP_PLUS: |
1349 | case CPP_MINUS: | |
1350 | if (c_dialect_objc ()) | |
1351 | { | |
1352 | c_parser_objc_method_definition (parser); | |
1353 | break; | |
1354 | } | |
1355 | /* Else fall through, and yield a syntax error trying to parse | |
1356 | as a declaration or function definition. */ | |
1357 | default: | |
1358 | decl_or_fndef: | |
c165dca7 IS |
1359 | /* A declaration or a function definition (or, in Objective-C, |
1360 | an @interface or @protocol with prefix attributes). We can | |
1361 | only tell which after parsing the declaration specifiers, if | |
1362 | any, and the first declarator. */ | |
f05b9d93 | 1363 | c_parser_declaration_or_fndef (parser, true, true, true, false, true, NULL); |
27bf414c JM |
1364 | break; |
1365 | } | |
1366 | } | |
1367 | ||
1368 | /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99 | |
1369 | 6.7, 6.9.1). If FNDEF_OK is true, a function definition is | |
1370 | accepted; otherwise (old-style parameter declarations) only other | |
32912286 JM |
1371 | declarations are accepted. If STATIC_ASSERT_OK is true, a static |
1372 | assertion is accepted; otherwise (old-style parameter declarations) | |
1373 | it is not. If NESTED is true, we are inside a function or parsing | |
1374 | old-style parameter declarations; any functions encountered are | |
1375 | nested functions and declaration specifiers are required; otherwise | |
1376 | we are at top level and functions are normal functions and | |
1377 | declaration specifiers may be optional. If EMPTY_OK is true, empty | |
1378 | declarations are OK (subject to all other constraints); otherwise | |
1379 | (old-style parameter declarations) they are diagnosed. If | |
1380 | START_ATTR_OK is true, the declaration specifiers may start with | |
1381 | attributes; otherwise they may not. | |
f05b9d93 NP |
1382 | OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed |
1383 | declaration when parsing an Objective-C foreach statement. | |
27bf414c JM |
1384 | |
1385 | declaration: | |
1386 | declaration-specifiers init-declarator-list[opt] ; | |
32912286 | 1387 | static_assert-declaration |
27bf414c JM |
1388 | |
1389 | function-definition: | |
1390 | declaration-specifiers[opt] declarator declaration-list[opt] | |
1391 | compound-statement | |
1392 | ||
1393 | declaration-list: | |
1394 | declaration | |
1395 | declaration-list declaration | |
1396 | ||
1397 | init-declarator-list: | |
1398 | init-declarator | |
1399 | init-declarator-list , init-declarator | |
1400 | ||
1401 | init-declarator: | |
1402 | declarator simple-asm-expr[opt] attributes[opt] | |
1403 | declarator simple-asm-expr[opt] attributes[opt] = initializer | |
1404 | ||
1405 | GNU extensions: | |
1406 | ||
1407 | nested-function-definition: | |
1408 | declaration-specifiers declarator declaration-list[opt] | |
1409 | compound-statement | |
1410 | ||
c165dca7 IS |
1411 | Objective-C: |
1412 | attributes objc-class-definition | |
1413 | attributes objc-category-definition | |
1414 | attributes objc-protocol-definition | |
1415 | ||
27bf414c JM |
1416 | The simple-asm-expr and attributes are GNU extensions. |
1417 | ||
1418 | This function does not handle __extension__; that is handled in its | |
1419 | callers. ??? Following the old parser, __extension__ may start | |
1420 | external declarations, declarations in functions and declarations | |
1421 | at the start of "for" loops, but not old-style parameter | |
1422 | declarations. | |
1423 | ||
1424 | C99 requires declaration specifiers in a function definition; the | |
1425 | absence is diagnosed through the diagnosis of implicit int. In GNU | |
1426 | C we also allow but diagnose declarations without declaration | |
1427 | specifiers, but only at top level (elsewhere they conflict with | |
953ff289 | 1428 | other syntax). |
b8698a0f | 1429 | |
f05b9d93 NP |
1430 | In Objective-C, declarations of the looping variable in a foreach |
1431 | statement are exceptionally terminated by 'in' (for example, 'for | |
1432 | (NSObject *object in array) { ... }'). | |
1433 | ||
953ff289 | 1434 | OpenMP: |
b8698a0f | 1435 | |
953ff289 DN |
1436 | declaration: |
1437 | threadprivate-directive */ | |
27bf414c JM |
1438 | |
1439 | static void | |
32912286 JM |
1440 | c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok, |
1441 | bool static_assert_ok, bool empty_ok, | |
f05b9d93 NP |
1442 | bool nested, bool start_attr_ok, |
1443 | tree *objc_foreach_object_declaration) | |
27bf414c JM |
1444 | { |
1445 | struct c_declspecs *specs; | |
1446 | tree prefix_attrs; | |
1447 | tree all_prefix_attrs; | |
1448 | bool diagnosed_no_specs = false; | |
c7412148 | 1449 | location_t here = c_parser_peek_token (parser)->location; |
bc4071dd | 1450 | |
32912286 JM |
1451 | if (static_assert_ok |
1452 | && c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) | |
1453 | { | |
1454 | c_parser_static_assert_declaration (parser); | |
1455 | return; | |
1456 | } | |
27bf414c | 1457 | specs = build_null_declspecs (); |
2f413185 PB |
1458 | |
1459 | /* Try to detect an unknown type name when we have "A B" or "A *B". */ | |
1460 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
1461 | && c_parser_peek_token (parser)->id_kind == C_ID_ID | |
1462 | && (c_parser_peek_2nd_token (parser)->type == CPP_NAME | |
1463 | || c_parser_peek_2nd_token (parser)->type == CPP_MULT) | |
1464 | && (!nested || !lookup_name (c_parser_peek_token (parser)->value))) | |
1465 | { | |
1466 | error_at (here, "unknown type name %qE", | |
1467 | c_parser_peek_token (parser)->value); | |
1468 | ||
1469 | /* Parse declspecs normally to get a correct pointer type, but avoid | |
a5812bdc PB |
1470 | a further "fails to be a type name" error. Refuse nested functions |
1471 | since it is not how the user likely wants us to recover. */ | |
2f413185 PB |
1472 | c_parser_peek_token (parser)->type = CPP_KEYWORD; |
1473 | c_parser_peek_token (parser)->keyword = RID_VOID; | |
1474 | c_parser_peek_token (parser)->value = error_mark_node; | |
a5812bdc | 1475 | fndef_ok = !nested; |
2f413185 PB |
1476 | } |
1477 | ||
29ce73cb | 1478 | c_parser_declspecs (parser, specs, true, true, start_attr_ok, cla_nonabstract_decl); |
27bf414c JM |
1479 | if (parser->error) |
1480 | { | |
1481 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1482 | return; | |
1483 | } | |
1484 | if (nested && !specs->declspecs_seen_p) | |
1485 | { | |
1486 | c_parser_error (parser, "expected declaration specifiers"); | |
1487 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1488 | return; | |
1489 | } | |
1490 | finish_declspecs (specs); | |
1491 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1492 | { | |
1493 | if (empty_ok) | |
1494 | shadow_tag (specs); | |
1495 | else | |
1496 | { | |
1497 | shadow_tag_warned (specs, 1); | |
509c9d60 | 1498 | pedwarn (here, 0, "empty declaration"); |
27bf414c JM |
1499 | } |
1500 | c_parser_consume_token (parser); | |
1501 | return; | |
1502 | } | |
f725e721 PB |
1503 | |
1504 | /* Provide better error recovery. Note that a type name here is usually | |
1505 | better diagnosed as a redeclaration. */ | |
1506 | if (empty_ok | |
1507 | && specs->typespec_kind == ctsk_tagdef | |
1508 | && c_parser_next_token_starts_declspecs (parser) | |
1509 | && !c_parser_next_token_is (parser, CPP_NAME)) | |
1510 | { | |
1511 | c_parser_error (parser, "expected %<;%>, identifier or %<(%>"); | |
1512 | parser->error = false; | |
1513 | shadow_tag_warned (specs, 1); | |
1514 | return; | |
1515 | } | |
c165dca7 IS |
1516 | else if (c_dialect_objc ()) |
1517 | { | |
f7e71da5 IS |
1518 | /* Prefix attributes are an error on method decls. */ |
1519 | switch (c_parser_peek_token (parser)->type) | |
1520 | { | |
1521 | case CPP_PLUS: | |
1522 | case CPP_MINUS: | |
1523 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1524 | return; | |
1525 | if (specs->attrs) | |
1526 | { | |
1527 | warning_at (c_parser_peek_token (parser)->location, | |
1528 | OPT_Wattributes, | |
1529 | "prefix attributes are ignored for methods"); | |
1530 | specs->attrs = NULL_TREE; | |
1531 | } | |
1532 | if (fndef_ok) | |
1533 | c_parser_objc_method_definition (parser); | |
1534 | else | |
1535 | c_parser_objc_methodproto (parser); | |
1536 | return; | |
1537 | break; | |
1538 | default: | |
1539 | break; | |
1540 | } | |
c165dca7 IS |
1541 | /* This is where we parse 'attributes @interface ...', |
1542 | 'attributes @implementation ...', 'attributes @protocol ...' | |
1543 | (where attributes could be, for example, __attribute__ | |
1544 | ((deprecated)). | |
1545 | */ | |
1546 | switch (c_parser_peek_token (parser)->keyword) | |
1547 | { | |
1548 | case RID_AT_INTERFACE: | |
1549 | { | |
1550 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1551 | return; | |
1552 | c_parser_objc_class_definition (parser, specs->attrs); | |
1553 | return; | |
1554 | } | |
1555 | break; | |
1556 | case RID_AT_IMPLEMENTATION: | |
1557 | { | |
1558 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1559 | return; | |
1560 | if (specs->attrs) | |
1561 | { | |
1562 | warning_at (c_parser_peek_token (parser)->location, | |
1563 | OPT_Wattributes, | |
1564 | "prefix attributes are ignored for implementations"); | |
1565 | specs->attrs = NULL_TREE; | |
1566 | } | |
1567 | c_parser_objc_class_definition (parser, NULL_TREE); | |
1568 | return; | |
1569 | } | |
1570 | break; | |
1571 | case RID_AT_PROTOCOL: | |
1572 | { | |
1573 | if (c_parser_objc_diagnose_bad_element_prefix (parser, specs)) | |
1574 | return; | |
1575 | c_parser_objc_protocol_definition (parser, specs->attrs); | |
1576 | return; | |
1577 | } | |
1578 | break; | |
668ea4b1 IS |
1579 | case RID_AT_ALIAS: |
1580 | case RID_AT_CLASS: | |
1581 | case RID_AT_END: | |
1582 | case RID_AT_PROPERTY: | |
1583 | if (specs->attrs) | |
1584 | { | |
96bbfbac | 1585 | c_parser_error (parser, "unexpected attribute"); |
668ea4b1 IS |
1586 | specs->attrs = NULL; |
1587 | } | |
1588 | break; | |
c165dca7 IS |
1589 | default: |
1590 | break; | |
1591 | } | |
1592 | } | |
1593 | ||
27bf414c JM |
1594 | pending_xref_error (); |
1595 | prefix_attrs = specs->attrs; | |
1596 | all_prefix_attrs = prefix_attrs; | |
1597 | specs->attrs = NULL_TREE; | |
1598 | while (true) | |
1599 | { | |
1600 | struct c_declarator *declarator; | |
1601 | bool dummy = false; | |
575bfb00 | 1602 | timevar_id_t tv; |
27bf414c JM |
1603 | tree fnbody; |
1604 | /* Declaring either one or more declarators (in which case we | |
1605 | should diagnose if there were no declaration specifiers) or a | |
1606 | function definition (in which case the diagnostic for | |
1607 | implicit int suffices). */ | |
9e5b2115 PB |
1608 | declarator = c_parser_declarator (parser, |
1609 | specs->typespec_kind != ctsk_none, | |
27bf414c JM |
1610 | C_DTR_NORMAL, &dummy); |
1611 | if (declarator == NULL) | |
1612 | { | |
1613 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1614 | return; | |
1615 | } | |
1616 | if (c_parser_next_token_is (parser, CPP_EQ) | |
1617 | || c_parser_next_token_is (parser, CPP_COMMA) | |
1618 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
1619 | || c_parser_next_token_is_keyword (parser, RID_ASM) | |
f05b9d93 NP |
1620 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE) |
1621 | || c_parser_next_token_is_keyword (parser, RID_IN)) | |
27bf414c JM |
1622 | { |
1623 | tree asm_name = NULL_TREE; | |
1624 | tree postfix_attrs = NULL_TREE; | |
1625 | if (!diagnosed_no_specs && !specs->declspecs_seen_p) | |
1626 | { | |
1627 | diagnosed_no_specs = true; | |
509c9d60 | 1628 | pedwarn (here, 0, "data definition has no type or storage class"); |
27bf414c JM |
1629 | } |
1630 | /* Having seen a data definition, there cannot now be a | |
1631 | function definition. */ | |
1632 | fndef_ok = false; | |
1633 | if (c_parser_next_token_is_keyword (parser, RID_ASM)) | |
1634 | asm_name = c_parser_simple_asm_expr (parser); | |
1635 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1636 | postfix_attrs = c_parser_attributes (parser); | |
1637 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
1638 | { | |
1639 | tree d; | |
1640 | struct c_expr init; | |
c2255bc4 | 1641 | location_t init_loc; |
27bf414c JM |
1642 | c_parser_consume_token (parser); |
1643 | /* The declaration of the variable is in effect while | |
1644 | its initializer is parsed. */ | |
1645 | d = start_decl (declarator, specs, true, | |
1646 | chainon (postfix_attrs, all_prefix_attrs)); | |
1647 | if (!d) | |
1648 | d = error_mark_node; | |
1649 | start_init (d, asm_name, global_bindings_p ()); | |
c2255bc4 | 1650 | init_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
1651 | init = c_parser_initializer (parser); |
1652 | finish_init (); | |
1653 | if (d != error_mark_node) | |
1654 | { | |
1655 | maybe_warn_string_init (TREE_TYPE (d), init); | |
c2255bc4 AH |
1656 | finish_decl (d, init_loc, init.value, |
1657 | init.original_type, asm_name); | |
27bf414c JM |
1658 | } |
1659 | } | |
1660 | else | |
1661 | { | |
1662 | tree d = start_decl (declarator, specs, false, | |
1663 | chainon (postfix_attrs, | |
1664 | all_prefix_attrs)); | |
1665 | if (d) | |
c2255bc4 | 1666 | finish_decl (d, UNKNOWN_LOCATION, NULL_TREE, |
f05b9d93 NP |
1667 | NULL_TREE, asm_name); |
1668 | ||
1669 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
1670 | { | |
1671 | if (d) | |
1672 | *objc_foreach_object_declaration = d; | |
1673 | else | |
1674 | *objc_foreach_object_declaration = error_mark_node; | |
1675 | } | |
27bf414c JM |
1676 | } |
1677 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
1678 | { | |
1679 | c_parser_consume_token (parser); | |
1680 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
1681 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
1682 | prefix_attrs); | |
1683 | else | |
1684 | all_prefix_attrs = prefix_attrs; | |
1685 | continue; | |
1686 | } | |
1687 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
1688 | { | |
1689 | c_parser_consume_token (parser); | |
1690 | return; | |
1691 | } | |
f05b9d93 NP |
1692 | else if (c_parser_next_token_is_keyword (parser, RID_IN)) |
1693 | { | |
1694 | /* This can only happen in Objective-C: we found the | |
1695 | 'in' that terminates the declaration inside an | |
1696 | Objective-C foreach statement. Do not consume the | |
1697 | token, so that the caller can use it to determine | |
1698 | that this indeed is a foreach context. */ | |
1699 | return; | |
1700 | } | |
27bf414c JM |
1701 | else |
1702 | { | |
1703 | c_parser_error (parser, "expected %<,%> or %<;%>"); | |
1704 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1705 | return; | |
1706 | } | |
1707 | } | |
1708 | else if (!fndef_ok) | |
1709 | { | |
1710 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, " | |
1711 | "%<asm%> or %<__attribute__%>"); | |
1712 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1713 | return; | |
1714 | } | |
1715 | /* Function definition (nested or otherwise). */ | |
1716 | if (nested) | |
1717 | { | |
c1771a20 | 1718 | pedwarn (here, OPT_Wpedantic, "ISO C forbids nested functions"); |
d2784db4 | 1719 | c_push_function_context (); |
27bf414c JM |
1720 | } |
1721 | if (!start_function (specs, declarator, all_prefix_attrs)) | |
1722 | { | |
1723 | /* This can appear in many cases looking nothing like a | |
1724 | function definition, so we don't give a more specific | |
1725 | error suggesting there was one. */ | |
1726 | c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> " | |
1727 | "or %<__attribute__%>"); | |
1728 | if (nested) | |
d2784db4 | 1729 | c_pop_function_context (); |
27bf414c JM |
1730 | break; |
1731 | } | |
575bfb00 LC |
1732 | |
1733 | if (DECL_DECLARED_INLINE_P (current_function_decl)) | |
1734 | tv = TV_PARSE_INLINE; | |
1735 | else | |
1736 | tv = TV_PARSE_FUNC; | |
1737 | timevar_push (tv); | |
1738 | ||
27bf414c JM |
1739 | /* Parse old-style parameter declarations. ??? Attributes are |
1740 | not allowed to start declaration specifiers here because of a | |
1741 | syntax conflict between a function declaration with attribute | |
1742 | suffix and a function definition with an attribute prefix on | |
1743 | first old-style parameter declaration. Following the old | |
1744 | parser, they are not accepted on subsequent old-style | |
1745 | parameter declarations either. However, there is no | |
1746 | ambiguity after the first declaration, nor indeed on the | |
1747 | first as long as we don't allow postfix attributes after a | |
1748 | declarator with a nonempty identifier list in a definition; | |
1749 | and postfix attributes have never been accepted here in | |
1750 | function definitions either. */ | |
1751 | while (c_parser_next_token_is_not (parser, CPP_EOF) | |
1752 | && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE)) | |
32912286 | 1753 | c_parser_declaration_or_fndef (parser, false, false, false, |
f05b9d93 | 1754 | true, false, NULL); |
27bf414c | 1755 | store_parm_decls (); |
1751ecd6 AH |
1756 | DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus |
1757 | = c_parser_peek_token (parser)->location; | |
27bf414c JM |
1758 | fnbody = c_parser_compound_statement (parser); |
1759 | if (nested) | |
1760 | { | |
1761 | tree decl = current_function_decl; | |
9f62cb92 JJ |
1762 | /* Mark nested functions as needing static-chain initially. |
1763 | lower_nested_functions will recompute it but the | |
1764 | DECL_STATIC_CHAIN flag is also used before that happens, | |
1765 | by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */ | |
1766 | DECL_STATIC_CHAIN (decl) = 1; | |
27bf414c JM |
1767 | add_stmt (fnbody); |
1768 | finish_function (); | |
d2784db4 | 1769 | c_pop_function_context (); |
c2255bc4 | 1770 | add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl)); |
27bf414c JM |
1771 | } |
1772 | else | |
1773 | { | |
1774 | add_stmt (fnbody); | |
1775 | finish_function (); | |
1776 | } | |
575bfb00 LC |
1777 | |
1778 | timevar_pop (tv); | |
27bf414c JM |
1779 | break; |
1780 | } | |
1781 | } | |
1782 | ||
1783 | /* Parse an asm-definition (asm() outside a function body). This is a | |
1784 | GNU extension. | |
1785 | ||
1786 | asm-definition: | |
1787 | simple-asm-expr ; | |
1788 | */ | |
1789 | ||
1790 | static void | |
1791 | c_parser_asm_definition (c_parser *parser) | |
1792 | { | |
1793 | tree asm_str = c_parser_simple_asm_expr (parser); | |
27bf414c | 1794 | if (asm_str) |
65d630d4 | 1795 | add_asm_node (asm_str); |
27bf414c JM |
1796 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
1797 | } | |
1798 | ||
48b0b196 | 1799 | /* Parse a static assertion (C11 6.7.10). |
32912286 JM |
1800 | |
1801 | static_assert-declaration: | |
1802 | static_assert-declaration-no-semi ; | |
1803 | */ | |
1804 | ||
1805 | static void | |
1806 | c_parser_static_assert_declaration (c_parser *parser) | |
1807 | { | |
1808 | c_parser_static_assert_declaration_no_semi (parser); | |
1809 | if (parser->error | |
1810 | || !c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
1811 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1812 | } | |
1813 | ||
48b0b196 | 1814 | /* Parse a static assertion (C11 6.7.10), without the trailing |
32912286 JM |
1815 | semicolon. |
1816 | ||
1817 | static_assert-declaration-no-semi: | |
1818 | _Static_assert ( constant-expression , string-literal ) | |
1819 | */ | |
1820 | ||
1821 | static void | |
1822 | c_parser_static_assert_declaration_no_semi (c_parser *parser) | |
1823 | { | |
1824 | location_t assert_loc, value_loc; | |
1825 | tree value; | |
1826 | tree string; | |
1827 | ||
1828 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)); | |
1829 | assert_loc = c_parser_peek_token (parser)->location; | |
48b0b196 | 1830 | if (!flag_isoc11) |
32912286 JM |
1831 | { |
1832 | if (flag_isoc99) | |
c1771a20 | 1833 | pedwarn (assert_loc, OPT_Wpedantic, |
32912286 JM |
1834 | "ISO C99 does not support %<_Static_assert%>"); |
1835 | else | |
c1771a20 | 1836 | pedwarn (assert_loc, OPT_Wpedantic, |
32912286 JM |
1837 | "ISO C90 does not support %<_Static_assert%>"); |
1838 | } | |
1839 | c_parser_consume_token (parser); | |
1840 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
1841 | return; | |
1842 | value_loc = c_parser_peek_token (parser)->location; | |
1843 | value = c_parser_expr_no_commas (parser, NULL).value; | |
1844 | parser->lex_untranslated_string = true; | |
1845 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
1846 | { | |
1847 | parser->lex_untranslated_string = false; | |
1848 | return; | |
1849 | } | |
1850 | switch (c_parser_peek_token (parser)->type) | |
1851 | { | |
1852 | case CPP_STRING: | |
1853 | case CPP_STRING16: | |
1854 | case CPP_STRING32: | |
1855 | case CPP_WSTRING: | |
1856 | case CPP_UTF8STRING: | |
1857 | string = c_parser_peek_token (parser)->value; | |
1858 | c_parser_consume_token (parser); | |
1859 | parser->lex_untranslated_string = false; | |
1860 | break; | |
1861 | default: | |
1862 | c_parser_error (parser, "expected string literal"); | |
1863 | parser->lex_untranslated_string = false; | |
1864 | return; | |
1865 | } | |
1866 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
1867 | ||
1868 | if (!INTEGRAL_TYPE_P (TREE_TYPE (value))) | |
1869 | { | |
1870 | error_at (value_loc, "expression in static assertion is not an integer"); | |
1871 | return; | |
1872 | } | |
1873 | if (TREE_CODE (value) != INTEGER_CST) | |
1874 | { | |
1875 | value = c_fully_fold (value, false, NULL); | |
1876 | if (TREE_CODE (value) == INTEGER_CST) | |
c1771a20 | 1877 | pedwarn (value_loc, OPT_Wpedantic, "expression in static assertion " |
32912286 JM |
1878 | "is not an integer constant expression"); |
1879 | } | |
1880 | if (TREE_CODE (value) != INTEGER_CST) | |
1881 | { | |
1882 | error_at (value_loc, "expression in static assertion is not constant"); | |
1883 | return; | |
1884 | } | |
1885 | constant_expression_warning (value); | |
1886 | if (integer_zerop (value)) | |
1887 | error_at (assert_loc, "static assertion failed: %E", string); | |
1888 | } | |
1889 | ||
27bf414c JM |
1890 | /* Parse some declaration specifiers (possibly none) (C90 6.5, C99 |
1891 | 6.7), adding them to SPECS (which may already include some). | |
1892 | Storage class specifiers are accepted iff SCSPEC_OK; type | |
1893 | specifiers are accepted iff TYPESPEC_OK; attributes are accepted at | |
1894 | the start iff START_ATTR_OK. | |
1895 | ||
1896 | declaration-specifiers: | |
1897 | storage-class-specifier declaration-specifiers[opt] | |
1898 | type-specifier declaration-specifiers[opt] | |
1899 | type-qualifier declaration-specifiers[opt] | |
1900 | function-specifier declaration-specifiers[opt] | |
d19fa6b5 | 1901 | alignment-specifier declaration-specifiers[opt] |
27bf414c JM |
1902 | |
1903 | Function specifiers (inline) are from C99, and are currently | |
d19fa6b5 | 1904 | handled as storage class specifiers, as is __thread. Alignment |
48b0b196 | 1905 | specifiers are from C11. |
27bf414c JM |
1906 | |
1907 | C90 6.5.1, C99 6.7.1: | |
1908 | storage-class-specifier: | |
1909 | typedef | |
1910 | extern | |
1911 | static | |
1912 | auto | |
1913 | register | |
1914 | ||
1915 | C99 6.7.4: | |
1916 | function-specifier: | |
1917 | inline | |
c4b3a0a0 JM |
1918 | _Noreturn |
1919 | ||
48b0b196 | 1920 | (_Noreturn is new in C11.) |
27bf414c JM |
1921 | |
1922 | C90 6.5.2, C99 6.7.2: | |
1923 | type-specifier: | |
1924 | void | |
1925 | char | |
1926 | short | |
1927 | int | |
1928 | long | |
1929 | float | |
1930 | double | |
1931 | signed | |
1932 | unsigned | |
1933 | _Bool | |
1934 | _Complex | |
1935 | [_Imaginary removed in C99 TC2] | |
1936 | struct-or-union-specifier | |
1937 | enum-specifier | |
1938 | typedef-name | |
1939 | ||
1940 | (_Bool and _Complex are new in C99.) | |
1941 | ||
1942 | C90 6.5.3, C99 6.7.3: | |
1943 | ||
1944 | type-qualifier: | |
1945 | const | |
1946 | restrict | |
1947 | volatile | |
36c5e70a | 1948 | address-space-qualifier |
27bf414c JM |
1949 | |
1950 | (restrict is new in C99.) | |
1951 | ||
1952 | GNU extensions: | |
1953 | ||
1954 | declaration-specifiers: | |
1955 | attributes declaration-specifiers[opt] | |
1956 | ||
36c5e70a BE |
1957 | type-qualifier: |
1958 | address-space | |
1959 | ||
1960 | address-space: | |
1961 | identifier recognized by the target | |
1962 | ||
27bf414c JM |
1963 | storage-class-specifier: |
1964 | __thread | |
1965 | ||
1966 | type-specifier: | |
1967 | typeof-specifier | |
a6766312 | 1968 | __int128 |
9a8ce21f JG |
1969 | _Decimal32 |
1970 | _Decimal64 | |
1971 | _Decimal128 | |
ab22c1fa CF |
1972 | _Fract |
1973 | _Accum | |
1974 | _Sat | |
1975 | ||
1976 | (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037: | |
1977 | http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) | |
27bf414c JM |
1978 | |
1979 | Objective-C: | |
1980 | ||
1981 | type-specifier: | |
1982 | class-name objc-protocol-refs[opt] | |
1983 | typedef-name objc-protocol-refs | |
1984 | objc-protocol-refs | |
1985 | */ | |
1986 | ||
1987 | static void | |
1988 | c_parser_declspecs (c_parser *parser, struct c_declspecs *specs, | |
29ce73cb PB |
1989 | bool scspec_ok, bool typespec_ok, bool start_attr_ok, |
1990 | enum c_lookahead_kind la) | |
27bf414c JM |
1991 | { |
1992 | bool attrs_ok = start_attr_ok; | |
9e5b2115 | 1993 | bool seen_type = specs->typespec_kind != ctsk_none; |
29ce73cb PB |
1994 | |
1995 | if (!typespec_ok) | |
1996 | gcc_assert (la == cla_prefer_id); | |
1997 | ||
1998 | while (c_parser_next_token_is (parser, CPP_NAME) | |
27bf414c JM |
1999 | || c_parser_next_token_is (parser, CPP_KEYWORD) |
2000 | || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS))) | |
2001 | { | |
2002 | struct c_typespec t; | |
2003 | tree attrs; | |
d19fa6b5 | 2004 | tree align; |
dc491a25 | 2005 | location_t loc = c_parser_peek_token (parser)->location; |
f725e721 | 2006 | |
29ce73cb PB |
2007 | /* If we cannot accept a type, exit if the next token must start |
2008 | one. Also, if we already have seen a tagged definition, | |
2009 | a typename would be an error anyway and likely the user | |
2010 | has simply forgotten a semicolon, so we exit. */ | |
2011 | if ((!typespec_ok || specs->typespec_kind == ctsk_tagdef) | |
2012 | && c_parser_next_tokens_start_typename (parser, la) | |
2013 | && !c_parser_next_token_is_qualifier (parser)) | |
2014 | break; | |
f725e721 | 2015 | |
27bf414c JM |
2016 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2017 | { | |
0b2c4be5 DS |
2018 | c_token *name_token = c_parser_peek_token (parser); |
2019 | tree value = name_token->value; | |
2020 | c_id_kind kind = name_token->id_kind; | |
36c5e70a BE |
2021 | |
2022 | if (kind == C_ID_ADDRSPACE) | |
2023 | { | |
2024 | addr_space_t as | |
0b2c4be5 DS |
2025 | = name_token->keyword - RID_FIRST_ADDR_SPACE; |
2026 | declspecs_add_addrspace (name_token->location, specs, as); | |
36c5e70a BE |
2027 | c_parser_consume_token (parser); |
2028 | attrs_ok = true; | |
2029 | continue; | |
2030 | } | |
2031 | ||
29ce73cb PB |
2032 | gcc_assert (!c_parser_next_token_is_qualifier (parser)); |
2033 | ||
2034 | /* If we cannot accept a type, and the next token must start one, | |
2035 | exit. Do the same if we already have seen a tagged definition, | |
2036 | since it would be an error anyway and likely the user has simply | |
2037 | forgotten a semicolon. */ | |
2038 | if (seen_type || !c_parser_next_tokens_start_typename (parser, la)) | |
2039 | break; | |
2040 | ||
2041 | /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or | |
2042 | a C_ID_CLASSNAME. */ | |
27bf414c JM |
2043 | c_parser_consume_token (parser); |
2044 | seen_type = true; | |
2045 | attrs_ok = true; | |
29ce73cb PB |
2046 | if (kind == C_ID_ID) |
2047 | { | |
2048 | error ("unknown type name %qE", value); | |
2049 | t.kind = ctsk_typedef; | |
2050 | t.spec = error_mark_node; | |
2051 | } | |
2052 | else if (kind == C_ID_TYPENAME | |
2053 | && (!c_dialect_objc () | |
2054 | || c_parser_next_token_is_not (parser, CPP_LESS))) | |
27bf414c JM |
2055 | { |
2056 | t.kind = ctsk_typedef; | |
2057 | /* For a typedef name, record the meaning, not the name. | |
2058 | In case of 'foo foo, bar;'. */ | |
2059 | t.spec = lookup_name (value); | |
2060 | } | |
2061 | else | |
2062 | { | |
2063 | tree proto = NULL_TREE; | |
2064 | gcc_assert (c_dialect_objc ()); | |
2065 | t.kind = ctsk_objc; | |
2066 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
2067 | proto = c_parser_objc_protocol_refs (parser); | |
2068 | t.spec = objc_get_protocol_qualified_type (value, proto); | |
2069 | } | |
29ce73cb PB |
2070 | t.expr = NULL_TREE; |
2071 | t.expr_const_operands = true; | |
0b2c4be5 | 2072 | declspecs_add_type (name_token->location, specs, t); |
27bf414c JM |
2073 | continue; |
2074 | } | |
2075 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
2076 | { | |
2077 | /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" - | |
2078 | nisse@lysator.liu.se. */ | |
2079 | tree proto; | |
2080 | gcc_assert (c_dialect_objc ()); | |
2081 | if (!typespec_ok || seen_type) | |
2082 | break; | |
2083 | proto = c_parser_objc_protocol_refs (parser); | |
2084 | t.kind = ctsk_objc; | |
2085 | t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto); | |
928c19bb JM |
2086 | t.expr = NULL_TREE; |
2087 | t.expr_const_operands = true; | |
dc491a25 | 2088 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
2089 | continue; |
2090 | } | |
2091 | gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD)); | |
2092 | switch (c_parser_peek_token (parser)->keyword) | |
2093 | { | |
2094 | case RID_STATIC: | |
2095 | case RID_EXTERN: | |
2096 | case RID_REGISTER: | |
2097 | case RID_TYPEDEF: | |
2098 | case RID_INLINE: | |
bbceee64 | 2099 | case RID_NORETURN: |
27bf414c JM |
2100 | case RID_AUTO: |
2101 | case RID_THREAD: | |
2102 | if (!scspec_ok) | |
2103 | goto out; | |
2104 | attrs_ok = true; | |
bbceee64 | 2105 | /* TODO: Distinguish between function specifiers (inline, noreturn) |
27bf414c JM |
2106 | and storage class specifiers, either here or in |
2107 | declspecs_add_scspec. */ | |
0b2c4be5 DS |
2108 | declspecs_add_scspec (loc, specs, |
2109 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
2110 | c_parser_consume_token (parser); |
2111 | break; | |
2112 | case RID_UNSIGNED: | |
2113 | case RID_LONG: | |
a6766312 | 2114 | case RID_INT128: |
27bf414c JM |
2115 | case RID_SHORT: |
2116 | case RID_SIGNED: | |
2117 | case RID_COMPLEX: | |
2118 | case RID_INT: | |
2119 | case RID_CHAR: | |
2120 | case RID_FLOAT: | |
2121 | case RID_DOUBLE: | |
2122 | case RID_VOID: | |
9a8ce21f JG |
2123 | case RID_DFLOAT32: |
2124 | case RID_DFLOAT64: | |
2125 | case RID_DFLOAT128: | |
27bf414c | 2126 | case RID_BOOL: |
ab22c1fa CF |
2127 | case RID_FRACT: |
2128 | case RID_ACCUM: | |
2129 | case RID_SAT: | |
27bf414c JM |
2130 | if (!typespec_ok) |
2131 | goto out; | |
2132 | attrs_ok = true; | |
2133 | seen_type = true; | |
0bacb8c7 TT |
2134 | if (c_dialect_objc ()) |
2135 | parser->objc_need_raw_identifier = true; | |
27bf414c JM |
2136 | t.kind = ctsk_resword; |
2137 | t.spec = c_parser_peek_token (parser)->value; | |
928c19bb JM |
2138 | t.expr = NULL_TREE; |
2139 | t.expr_const_operands = true; | |
dc491a25 | 2140 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
2141 | c_parser_consume_token (parser); |
2142 | break; | |
2143 | case RID_ENUM: | |
2144 | if (!typespec_ok) | |
2145 | goto out; | |
2146 | attrs_ok = true; | |
2147 | seen_type = true; | |
2148 | t = c_parser_enum_specifier (parser); | |
dc491a25 | 2149 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
2150 | break; |
2151 | case RID_STRUCT: | |
2152 | case RID_UNION: | |
2153 | if (!typespec_ok) | |
2154 | goto out; | |
2155 | attrs_ok = true; | |
2156 | seen_type = true; | |
2157 | t = c_parser_struct_or_union_specifier (parser); | |
dab71827 | 2158 | invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, t.spec); |
dc491a25 | 2159 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
2160 | break; |
2161 | case RID_TYPEOF: | |
2162 | /* ??? The old parser rejected typeof after other type | |
2163 | specifiers, but is a syntax error the best way of | |
2164 | handling this? */ | |
2165 | if (!typespec_ok || seen_type) | |
2166 | goto out; | |
2167 | attrs_ok = true; | |
2168 | seen_type = true; | |
2169 | t = c_parser_typeof_specifier (parser); | |
dc491a25 | 2170 | declspecs_add_type (loc, specs, t); |
27bf414c JM |
2171 | break; |
2172 | case RID_CONST: | |
2173 | case RID_VOLATILE: | |
2174 | case RID_RESTRICT: | |
2175 | attrs_ok = true; | |
0b2c4be5 | 2176 | declspecs_add_qual (loc, specs, c_parser_peek_token (parser)->value); |
27bf414c JM |
2177 | c_parser_consume_token (parser); |
2178 | break; | |
2179 | case RID_ATTRIBUTE: | |
2180 | if (!attrs_ok) | |
2181 | goto out; | |
2182 | attrs = c_parser_attributes (parser); | |
0b2c4be5 | 2183 | declspecs_add_attrs (loc, specs, attrs); |
27bf414c | 2184 | break; |
d19fa6b5 JM |
2185 | case RID_ALIGNAS: |
2186 | align = c_parser_alignas_specifier (parser); | |
0b2c4be5 | 2187 | declspecs_add_alignas (loc, specs, align); |
d19fa6b5 | 2188 | break; |
27bf414c JM |
2189 | default: |
2190 | goto out; | |
2191 | } | |
2192 | } | |
2193 | out: ; | |
2194 | } | |
2195 | ||
2196 | /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2). | |
2197 | ||
2198 | enum-specifier: | |
2199 | enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt] | |
2200 | enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt] | |
2201 | enum attributes[opt] identifier | |
2202 | ||
2203 | The form with trailing comma is new in C99. The forms with | |
2204 | attributes are GNU extensions. In GNU C, we accept any expression | |
2205 | without commas in the syntax (assignment expressions, not just | |
2206 | conditional expressions); assignment expressions will be diagnosed | |
2207 | as non-constant. | |
2208 | ||
2209 | enumerator-list: | |
2210 | enumerator | |
2211 | enumerator-list , enumerator | |
2212 | ||
2213 | enumerator: | |
2214 | enumeration-constant | |
2215 | enumeration-constant = constant-expression | |
2216 | */ | |
2217 | ||
2218 | static struct c_typespec | |
2219 | c_parser_enum_specifier (c_parser *parser) | |
2220 | { | |
2221 | struct c_typespec ret; | |
2222 | tree attrs; | |
2223 | tree ident = NULL_TREE; | |
24b97832 | 2224 | location_t enum_loc; |
922f2908 | 2225 | location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c | 2226 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM)); |
24b97832 | 2227 | enum_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2228 | c_parser_consume_token (parser); |
2229 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 2230 | enum_loc = c_parser_peek_token (parser)->location; |
5af28c74 TT |
2231 | /* Set the location in case we create a decl now. */ |
2232 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
27bf414c JM |
2233 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2234 | { | |
2235 | ident = c_parser_peek_token (parser)->value; | |
c7412148 | 2236 | ident_loc = c_parser_peek_token (parser)->location; |
24b97832 | 2237 | enum_loc = ident_loc; |
27bf414c JM |
2238 | c_parser_consume_token (parser); |
2239 | } | |
2240 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
2241 | { | |
2242 | /* Parse an enum definition. */ | |
7114359f | 2243 | struct c_enum_contents the_enum; |
575bfb00 | 2244 | tree type; |
27bf414c JM |
2245 | tree postfix_attrs; |
2246 | /* We chain the enumerators in reverse order, then put them in | |
2247 | forward order at the end. */ | |
575bfb00 LC |
2248 | tree values; |
2249 | timevar_push (TV_PARSE_ENUM); | |
2250 | type = start_enum (enum_loc, &the_enum, ident); | |
2251 | values = NULL_TREE; | |
27bf414c JM |
2252 | c_parser_consume_token (parser); |
2253 | while (true) | |
2254 | { | |
2255 | tree enum_id; | |
2256 | tree enum_value; | |
2257 | tree enum_decl; | |
2258 | bool seen_comma; | |
5af28c74 | 2259 | c_token *token; |
922f2908 | 2260 | location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
7370e0da | 2261 | location_t decl_loc, value_loc; |
27bf414c JM |
2262 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
2263 | { | |
2264 | c_parser_error (parser, "expected identifier"); | |
2265 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2266 | values = error_mark_node; | |
2267 | break; | |
2268 | } | |
5af28c74 TT |
2269 | token = c_parser_peek_token (parser); |
2270 | enum_id = token->value; | |
2271 | /* Set the location in case we create a decl now. */ | |
2272 | c_parser_set_source_position_from_token (token); | |
7370e0da | 2273 | decl_loc = value_loc = token->location; |
27bf414c JM |
2274 | c_parser_consume_token (parser); |
2275 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
2276 | { | |
2277 | c_parser_consume_token (parser); | |
85790e66 | 2278 | value_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2279 | enum_value = c_parser_expr_no_commas (parser, NULL).value; |
2280 | } | |
2281 | else | |
2282 | enum_value = NULL_TREE; | |
7370e0da | 2283 | enum_decl = build_enumerator (decl_loc, value_loc, |
c2255bc4 | 2284 | &the_enum, enum_id, enum_value); |
27bf414c JM |
2285 | TREE_CHAIN (enum_decl) = values; |
2286 | values = enum_decl; | |
2287 | seen_comma = false; | |
2288 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2289 | { | |
c7412148 | 2290 | comma_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2291 | seen_comma = true; |
2292 | c_parser_consume_token (parser); | |
2293 | } | |
2294 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2295 | { | |
fcf73884 | 2296 | if (seen_comma && !flag_isoc99) |
c1771a20 | 2297 | pedwarn (comma_loc, OPT_Wpedantic, "comma at end of enumerator list"); |
27bf414c JM |
2298 | c_parser_consume_token (parser); |
2299 | break; | |
2300 | } | |
2301 | if (!seen_comma) | |
2302 | { | |
2303 | c_parser_error (parser, "expected %<,%> or %<}%>"); | |
2304 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2305 | values = error_mark_node; | |
2306 | break; | |
2307 | } | |
2308 | } | |
2309 | postfix_attrs = c_parser_attributes (parser); | |
2310 | ret.spec = finish_enum (type, nreverse (values), | |
2311 | chainon (attrs, postfix_attrs)); | |
2312 | ret.kind = ctsk_tagdef; | |
928c19bb JM |
2313 | ret.expr = NULL_TREE; |
2314 | ret.expr_const_operands = true; | |
575bfb00 | 2315 | timevar_pop (TV_PARSE_ENUM); |
27bf414c JM |
2316 | return ret; |
2317 | } | |
2318 | else if (!ident) | |
2319 | { | |
2320 | c_parser_error (parser, "expected %<{%>"); | |
2321 | ret.spec = error_mark_node; | |
2322 | ret.kind = ctsk_tagref; | |
928c19bb JM |
2323 | ret.expr = NULL_TREE; |
2324 | ret.expr_const_operands = true; | |
27bf414c JM |
2325 | return ret; |
2326 | } | |
c2255bc4 | 2327 | ret = parser_xref_tag (ident_loc, ENUMERAL_TYPE, ident); |
27bf414c JM |
2328 | /* In ISO C, enumerated types can be referred to only if already |
2329 | defined. */ | |
2330 | if (pedantic && !COMPLETE_TYPE_P (ret.spec)) | |
c7412148 TT |
2331 | { |
2332 | gcc_assert (ident); | |
c1771a20 | 2333 | pedwarn (enum_loc, OPT_Wpedantic, |
509c9d60 | 2334 | "ISO C forbids forward references to %<enum%> types"); |
c7412148 | 2335 | } |
27bf414c JM |
2336 | return ret; |
2337 | } | |
2338 | ||
2339 | /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1). | |
2340 | ||
2341 | struct-or-union-specifier: | |
2342 | struct-or-union attributes[opt] identifier[opt] | |
2343 | { struct-contents } attributes[opt] | |
2344 | struct-or-union attributes[opt] identifier | |
2345 | ||
2346 | struct-contents: | |
2347 | struct-declaration-list | |
2348 | ||
2349 | struct-declaration-list: | |
2350 | struct-declaration ; | |
2351 | struct-declaration-list struct-declaration ; | |
2352 | ||
2353 | GNU extensions: | |
2354 | ||
2355 | struct-contents: | |
2356 | empty | |
2357 | struct-declaration | |
2358 | struct-declaration-list struct-declaration | |
2359 | ||
2360 | struct-declaration-list: | |
2361 | struct-declaration-list ; | |
2362 | ; | |
2363 | ||
2364 | (Note that in the syntax here, unlike that in ISO C, the semicolons | |
2365 | are included here rather than in struct-declaration, in order to | |
2366 | describe the syntax with extra semicolons and missing semicolon at | |
2367 | end.) | |
2368 | ||
2369 | Objective-C: | |
2370 | ||
2371 | struct-declaration-list: | |
2372 | @defs ( class-name ) | |
2373 | ||
2374 | (Note this does not include a trailing semicolon, but can be | |
2375 | followed by further declarations, and gets a pedwarn-if-pedantic | |
2376 | when followed by a semicolon.) */ | |
2377 | ||
2378 | static struct c_typespec | |
2379 | c_parser_struct_or_union_specifier (c_parser *parser) | |
2380 | { | |
2381 | struct c_typespec ret; | |
2382 | tree attrs; | |
2383 | tree ident = NULL_TREE; | |
24b97832 ILT |
2384 | location_t struct_loc; |
2385 | location_t ident_loc = UNKNOWN_LOCATION; | |
27bf414c JM |
2386 | enum tree_code code; |
2387 | switch (c_parser_peek_token (parser)->keyword) | |
2388 | { | |
2389 | case RID_STRUCT: | |
2390 | code = RECORD_TYPE; | |
2391 | break; | |
2392 | case RID_UNION: | |
2393 | code = UNION_TYPE; | |
2394 | break; | |
2395 | default: | |
2396 | gcc_unreachable (); | |
2397 | } | |
24b97832 | 2398 | struct_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2399 | c_parser_consume_token (parser); |
2400 | attrs = c_parser_attributes (parser); | |
c2255bc4 | 2401 | |
5af28c74 TT |
2402 | /* Set the location in case we create a decl now. */ |
2403 | c_parser_set_source_position_from_token (c_parser_peek_token (parser)); | |
c2255bc4 | 2404 | |
27bf414c JM |
2405 | if (c_parser_next_token_is (parser, CPP_NAME)) |
2406 | { | |
2407 | ident = c_parser_peek_token (parser)->value; | |
24b97832 ILT |
2408 | ident_loc = c_parser_peek_token (parser)->location; |
2409 | struct_loc = ident_loc; | |
27bf414c JM |
2410 | c_parser_consume_token (parser); |
2411 | } | |
2412 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
2413 | { | |
2414 | /* Parse a struct or union definition. Start the scope of the | |
2415 | tag before parsing components. */ | |
dc491a25 ILT |
2416 | struct c_struct_parse_info *struct_info; |
2417 | tree type = start_struct (struct_loc, code, ident, &struct_info); | |
27bf414c JM |
2418 | tree postfix_attrs; |
2419 | /* We chain the components in reverse order, then put them in | |
2420 | forward order at the end. Each struct-declaration may | |
2421 | declare multiple components (comma-separated), so we must use | |
2422 | chainon to join them, although when parsing each | |
2423 | struct-declaration we can use TREE_CHAIN directly. | |
2424 | ||
2425 | The theory behind all this is that there will be more | |
2426 | semicolon separated fields than comma separated fields, and | |
2427 | so we'll be minimizing the number of node traversals required | |
2428 | by chainon. */ | |
575bfb00 LC |
2429 | tree contents; |
2430 | timevar_push (TV_PARSE_STRUCT); | |
2431 | contents = NULL_TREE; | |
27bf414c JM |
2432 | c_parser_consume_token (parser); |
2433 | /* Handle the Objective-C @defs construct, | |
2434 | e.g. foo(sizeof(struct{ @defs(ClassName) }));. */ | |
2435 | if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS)) | |
2436 | { | |
2437 | tree name; | |
2438 | gcc_assert (c_dialect_objc ()); | |
2439 | c_parser_consume_token (parser); | |
2440 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2441 | goto end_at_defs; | |
2442 | if (c_parser_next_token_is (parser, CPP_NAME) | |
2443 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME) | |
2444 | { | |
2445 | name = c_parser_peek_token (parser)->value; | |
2446 | c_parser_consume_token (parser); | |
2447 | } | |
2448 | else | |
2449 | { | |
2450 | c_parser_error (parser, "expected class name"); | |
2451 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
2452 | goto end_at_defs; | |
2453 | } | |
2454 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
2455 | "expected %<)%>"); | |
2456 | contents = nreverse (objc_get_class_ivars (name)); | |
2457 | } | |
2458 | end_at_defs: | |
2459 | /* Parse the struct-declarations and semicolons. Problems with | |
2460 | semicolons are diagnosed here; empty structures are diagnosed | |
2461 | elsewhere. */ | |
2462 | while (true) | |
2463 | { | |
2464 | tree decls; | |
2465 | /* Parse any stray semicolon. */ | |
2466 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2467 | { | |
c1771a20 | 2468 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 2469 | "extra semicolon in struct or union specified"); |
27bf414c JM |
2470 | c_parser_consume_token (parser); |
2471 | continue; | |
2472 | } | |
2473 | /* Stop if at the end of the struct or union contents. */ | |
2474 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2475 | { | |
2476 | c_parser_consume_token (parser); | |
2477 | break; | |
2478 | } | |
bc4071dd RH |
2479 | /* Accept #pragmas at struct scope. */ |
2480 | if (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
2481 | { | |
2482 | c_parser_pragma (parser, pragma_external); | |
2483 | continue; | |
2484 | } | |
27bf414c JM |
2485 | /* Parse some comma-separated declarations, but not the |
2486 | trailing semicolon if any. */ | |
2487 | decls = c_parser_struct_declaration (parser); | |
2488 | contents = chainon (decls, contents); | |
2489 | /* If no semicolon follows, either we have a parse error or | |
2490 | are at the end of the struct or union and should | |
2491 | pedwarn. */ | |
2492 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
2493 | c_parser_consume_token (parser); | |
2494 | else | |
2495 | { | |
2496 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
b8698a0f | 2497 | pedwarn (c_parser_peek_token (parser)->location, 0, |
509c9d60 | 2498 | "no semicolon at end of struct or union"); |
f725e721 PB |
2499 | else if (parser->error |
2500 | || !c_parser_next_token_starts_declspecs (parser)) | |
27bf414c JM |
2501 | { |
2502 | c_parser_error (parser, "expected %<;%>"); | |
2503 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
2504 | break; | |
2505 | } | |
f725e721 PB |
2506 | |
2507 | /* If we come here, we have already emitted an error | |
2508 | for an expected `;', identifier or `(', and we also | |
2509 | recovered already. Go on with the next field. */ | |
27bf414c JM |
2510 | } |
2511 | } | |
2512 | postfix_attrs = c_parser_attributes (parser); | |
c2255bc4 | 2513 | ret.spec = finish_struct (struct_loc, type, nreverse (contents), |
dc491a25 | 2514 | chainon (attrs, postfix_attrs), struct_info); |
27bf414c | 2515 | ret.kind = ctsk_tagdef; |
928c19bb JM |
2516 | ret.expr = NULL_TREE; |
2517 | ret.expr_const_operands = true; | |
575bfb00 | 2518 | timevar_pop (TV_PARSE_STRUCT); |
27bf414c JM |
2519 | return ret; |
2520 | } | |
2521 | else if (!ident) | |
2522 | { | |
2523 | c_parser_error (parser, "expected %<{%>"); | |
2524 | ret.spec = error_mark_node; | |
2525 | ret.kind = ctsk_tagref; | |
928c19bb JM |
2526 | ret.expr = NULL_TREE; |
2527 | ret.expr_const_operands = true; | |
67c2939d | 2528 | return ret; |
27bf414c | 2529 | } |
c2255bc4 | 2530 | ret = parser_xref_tag (ident_loc, code, ident); |
27bf414c JM |
2531 | return ret; |
2532 | } | |
2533 | ||
2534 | /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without* | |
2535 | the trailing semicolon. | |
2536 | ||
2537 | struct-declaration: | |
2538 | specifier-qualifier-list struct-declarator-list | |
32912286 | 2539 | static_assert-declaration-no-semi |
27bf414c JM |
2540 | |
2541 | specifier-qualifier-list: | |
2542 | type-specifier specifier-qualifier-list[opt] | |
2543 | type-qualifier specifier-qualifier-list[opt] | |
2544 | attributes specifier-qualifier-list[opt] | |
2545 | ||
2546 | struct-declarator-list: | |
2547 | struct-declarator | |
2548 | struct-declarator-list , attributes[opt] struct-declarator | |
2549 | ||
2550 | struct-declarator: | |
2551 | declarator attributes[opt] | |
2552 | declarator[opt] : constant-expression attributes[opt] | |
2553 | ||
2554 | GNU extensions: | |
2555 | ||
2556 | struct-declaration: | |
2557 | __extension__ struct-declaration | |
2558 | specifier-qualifier-list | |
2559 | ||
2560 | Unlike the ISO C syntax, semicolons are handled elsewhere. The use | |
2561 | of attributes where shown is a GNU extension. In GNU C, we accept | |
2562 | any expression without commas in the syntax (assignment | |
2563 | expressions, not just conditional expressions); assignment | |
2564 | expressions will be diagnosed as non-constant. */ | |
2565 | ||
2566 | static tree | |
2567 | c_parser_struct_declaration (c_parser *parser) | |
2568 | { | |
2569 | struct c_declspecs *specs; | |
2570 | tree prefix_attrs; | |
2571 | tree all_prefix_attrs; | |
2572 | tree decls; | |
c7412148 | 2573 | location_t decl_loc; |
27bf414c JM |
2574 | if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) |
2575 | { | |
2576 | int ext; | |
2577 | tree decl; | |
2578 | ext = disable_extension_diagnostics (); | |
2579 | c_parser_consume_token (parser); | |
2580 | decl = c_parser_struct_declaration (parser); | |
2581 | restore_extension_diagnostics (ext); | |
2582 | return decl; | |
2583 | } | |
32912286 JM |
2584 | if (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT)) |
2585 | { | |
2586 | c_parser_static_assert_declaration_no_semi (parser); | |
2587 | return NULL_TREE; | |
2588 | } | |
27bf414c | 2589 | specs = build_null_declspecs (); |
c7412148 | 2590 | decl_loc = c_parser_peek_token (parser)->location; |
29ce73cb | 2591 | c_parser_declspecs (parser, specs, false, true, true, cla_nonabstract_decl); |
27bf414c | 2592 | if (parser->error) |
67c2939d | 2593 | return NULL_TREE; |
27bf414c JM |
2594 | if (!specs->declspecs_seen_p) |
2595 | { | |
2596 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
2597 | return NULL_TREE; | |
2598 | } | |
2599 | finish_declspecs (specs); | |
b8cbdff5 JM |
2600 | if (c_parser_next_token_is (parser, CPP_SEMICOLON) |
2601 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
27bf414c JM |
2602 | { |
2603 | tree ret; | |
9e5b2115 | 2604 | if (specs->typespec_kind == ctsk_none) |
27bf414c | 2605 | { |
c1771a20 | 2606 | pedwarn (decl_loc, OPT_Wpedantic, |
509c9d60 | 2607 | "ISO C forbids member declarations with no members"); |
27bf414c JM |
2608 | shadow_tag_warned (specs, pedantic); |
2609 | ret = NULL_TREE; | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | /* Support for unnamed structs or unions as members of | |
2614 | structs or unions (which is [a] useful and [b] supports | |
2615 | MS P-SDK). */ | |
b9baeecd | 2616 | tree attrs = NULL; |
3d10ed6c AH |
2617 | |
2618 | ret = grokfield (c_parser_peek_token (parser)->location, | |
2619 | build_id_declarator (NULL_TREE), specs, | |
b9baeecd | 2620 | NULL_TREE, &attrs); |
0ad7e054 RS |
2621 | if (ret) |
2622 | decl_attributes (&ret, attrs, 0); | |
27bf414c JM |
2623 | } |
2624 | return ret; | |
2625 | } | |
f725e721 PB |
2626 | |
2627 | /* Provide better error recovery. Note that a type name here is valid, | |
2628 | and will be treated as a field name. */ | |
2629 | if (specs->typespec_kind == ctsk_tagdef | |
2630 | && TREE_CODE (specs->type) != ENUMERAL_TYPE | |
2631 | && c_parser_next_token_starts_declspecs (parser) | |
2632 | && !c_parser_next_token_is (parser, CPP_NAME)) | |
2633 | { | |
2634 | c_parser_error (parser, "expected %<;%>, identifier or %<(%>"); | |
2635 | parser->error = false; | |
2636 | return NULL_TREE; | |
2637 | } | |
2638 | ||
27bf414c JM |
2639 | pending_xref_error (); |
2640 | prefix_attrs = specs->attrs; | |
2641 | all_prefix_attrs = prefix_attrs; | |
2642 | specs->attrs = NULL_TREE; | |
2643 | decls = NULL_TREE; | |
2644 | while (true) | |
2645 | { | |
2646 | /* Declaring one or more declarators or un-named bit-fields. */ | |
2647 | struct c_declarator *declarator; | |
2648 | bool dummy = false; | |
2649 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2650 | declarator = build_id_declarator (NULL_TREE); | |
2651 | else | |
9e5b2115 PB |
2652 | declarator = c_parser_declarator (parser, |
2653 | specs->typespec_kind != ctsk_none, | |
27bf414c JM |
2654 | C_DTR_NORMAL, &dummy); |
2655 | if (declarator == NULL) | |
2656 | { | |
2657 | c_parser_skip_to_end_of_block_or_statement (parser); | |
2658 | break; | |
2659 | } | |
2660 | if (c_parser_next_token_is (parser, CPP_COLON) | |
2661 | || c_parser_next_token_is (parser, CPP_COMMA) | |
2662 | || c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2663 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE) | |
2664 | || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2665 | { | |
2666 | tree postfix_attrs = NULL_TREE; | |
2667 | tree width = NULL_TREE; | |
2668 | tree d; | |
2669 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
2670 | { | |
2671 | c_parser_consume_token (parser); | |
2672 | width = c_parser_expr_no_commas (parser, NULL).value; | |
2673 | } | |
2674 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2675 | postfix_attrs = c_parser_attributes (parser); | |
3d10ed6c AH |
2676 | d = grokfield (c_parser_peek_token (parser)->location, |
2677 | declarator, specs, width, &all_prefix_attrs); | |
27bf414c JM |
2678 | decl_attributes (&d, chainon (postfix_attrs, |
2679 | all_prefix_attrs), 0); | |
910ad8de | 2680 | DECL_CHAIN (d) = decls; |
27bf414c JM |
2681 | decls = d; |
2682 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
2683 | all_prefix_attrs = chainon (c_parser_attributes (parser), | |
2684 | prefix_attrs); | |
2685 | else | |
2686 | all_prefix_attrs = prefix_attrs; | |
2687 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
2688 | c_parser_consume_token (parser); | |
2689 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
2690 | || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
2691 | { | |
2692 | /* Semicolon consumed in caller. */ | |
2693 | break; | |
2694 | } | |
2695 | else | |
2696 | { | |
2697 | c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>"); | |
2698 | break; | |
2699 | } | |
2700 | } | |
2701 | else | |
2702 | { | |
2703 | c_parser_error (parser, | |
2704 | "expected %<:%>, %<,%>, %<;%>, %<}%> or " | |
2705 | "%<__attribute__%>"); | |
2706 | break; | |
2707 | } | |
2708 | } | |
2709 | return decls; | |
2710 | } | |
2711 | ||
2712 | /* Parse a typeof specifier (a GNU extension). | |
2713 | ||
2714 | typeof-specifier: | |
2715 | typeof ( expression ) | |
2716 | typeof ( type-name ) | |
2717 | */ | |
2718 | ||
2719 | static struct c_typespec | |
2720 | c_parser_typeof_specifier (c_parser *parser) | |
2721 | { | |
2722 | struct c_typespec ret; | |
2723 | ret.kind = ctsk_typeof; | |
2724 | ret.spec = error_mark_node; | |
928c19bb JM |
2725 | ret.expr = NULL_TREE; |
2726 | ret.expr_const_operands = true; | |
27bf414c JM |
2727 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF)); |
2728 | c_parser_consume_token (parser); | |
7d882b83 | 2729 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
2730 | in_typeof++; |
2731 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2732 | { | |
7d882b83 | 2733 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2734 | in_typeof--; |
2735 | return ret; | |
2736 | } | |
29ce73cb | 2737 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_id)) |
27bf414c JM |
2738 | { |
2739 | struct c_type_name *type = c_parser_type_name (parser); | |
7d882b83 | 2740 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2741 | in_typeof--; |
2742 | if (type != NULL) | |
2743 | { | |
928c19bb | 2744 | ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands); |
27bf414c JM |
2745 | pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE)); |
2746 | } | |
2747 | } | |
2748 | else | |
2749 | { | |
52ffd86e | 2750 | bool was_vm; |
c7412148 | 2751 | location_t here = c_parser_peek_token (parser)->location; |
27bf414c | 2752 | struct c_expr expr = c_parser_expression (parser); |
7d882b83 | 2753 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
2754 | in_typeof--; |
2755 | if (TREE_CODE (expr.value) == COMPONENT_REF | |
2756 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 2757 | error_at (here, "%<typeof%> applied to a bit-field"); |
ebfbbdc5 | 2758 | mark_exp_read (expr.value); |
27bf414c | 2759 | ret.spec = TREE_TYPE (expr.value); |
52ffd86e | 2760 | was_vm = variably_modified_type_p (ret.spec, NULL_TREE); |
928c19bb JM |
2761 | /* This is returned with the type so that when the type is |
2762 | evaluated, this can be evaluated. */ | |
2763 | if (was_vm) | |
2764 | ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands); | |
52ffd86e | 2765 | pop_maybe_used (was_vm); |
27bf414c JM |
2766 | } |
2767 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2768 | return ret; | |
2769 | } | |
2770 | ||
d19fa6b5 JM |
2771 | /* Parse an alignment-specifier. |
2772 | ||
48b0b196 | 2773 | C11 6.7.5: |
d19fa6b5 JM |
2774 | |
2775 | alignment-specifier: | |
2776 | _Alignas ( type-name ) | |
2777 | _Alignas ( constant-expression ) | |
2778 | */ | |
2779 | ||
2780 | static tree | |
2781 | c_parser_alignas_specifier (c_parser * parser) | |
2782 | { | |
2783 | tree ret = error_mark_node; | |
2784 | location_t loc = c_parser_peek_token (parser)->location; | |
2785 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNAS)); | |
2786 | c_parser_consume_token (parser); | |
48b0b196 | 2787 | if (!flag_isoc11) |
d19fa6b5 JM |
2788 | { |
2789 | if (flag_isoc99) | |
c1771a20 | 2790 | pedwarn (loc, OPT_Wpedantic, |
d19fa6b5 JM |
2791 | "ISO C99 does not support %<_Alignas%>"); |
2792 | else | |
c1771a20 | 2793 | pedwarn (loc, OPT_Wpedantic, |
d19fa6b5 JM |
2794 | "ISO C90 does not support %<_Alignas%>"); |
2795 | } | |
2796 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
2797 | return ret; | |
2798 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_id)) | |
2799 | { | |
2800 | struct c_type_name *type = c_parser_type_name (parser); | |
2801 | if (type != NULL) | |
2802 | ret = c_alignof (loc, groktypename (type, NULL, NULL)); | |
2803 | } | |
2804 | else | |
2805 | ret = c_parser_expr_no_commas (parser, NULL).value; | |
2806 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
2807 | return ret; | |
2808 | } | |
2809 | ||
27bf414c JM |
2810 | /* Parse a declarator, possibly an abstract declarator (C90 6.5.4, |
2811 | 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may | |
2812 | be redeclared; otherwise it may not. KIND indicates which kind of | |
2813 | declarator is wanted. Returns a valid declarator except in the | |
2814 | case of a syntax error in which case NULL is returned. *SEEN_ID is | |
2815 | set to true if an identifier being declared is seen; this is used | |
2816 | to diagnose bad forms of abstract array declarators and to | |
2817 | determine whether an identifier list is syntactically permitted. | |
2818 | ||
2819 | declarator: | |
2820 | pointer[opt] direct-declarator | |
2821 | ||
2822 | direct-declarator: | |
2823 | identifier | |
2824 | ( attributes[opt] declarator ) | |
2825 | direct-declarator array-declarator | |
2826 | direct-declarator ( parameter-type-list ) | |
2827 | direct-declarator ( identifier-list[opt] ) | |
2828 | ||
2829 | pointer: | |
2830 | * type-qualifier-list[opt] | |
2831 | * type-qualifier-list[opt] pointer | |
2832 | ||
2833 | type-qualifier-list: | |
2834 | type-qualifier | |
2835 | attributes | |
2836 | type-qualifier-list type-qualifier | |
2837 | type-qualifier-list attributes | |
2838 | ||
2839 | parameter-type-list: | |
2840 | parameter-list | |
2841 | parameter-list , ... | |
2842 | ||
2843 | parameter-list: | |
2844 | parameter-declaration | |
2845 | parameter-list , parameter-declaration | |
2846 | ||
2847 | parameter-declaration: | |
2848 | declaration-specifiers declarator attributes[opt] | |
2849 | declaration-specifiers abstract-declarator[opt] attributes[opt] | |
2850 | ||
2851 | identifier-list: | |
2852 | identifier | |
2853 | identifier-list , identifier | |
2854 | ||
2855 | abstract-declarator: | |
2856 | pointer | |
2857 | pointer[opt] direct-abstract-declarator | |
2858 | ||
2859 | direct-abstract-declarator: | |
2860 | ( attributes[opt] abstract-declarator ) | |
2861 | direct-abstract-declarator[opt] array-declarator | |
2862 | direct-abstract-declarator[opt] ( parameter-type-list[opt] ) | |
2863 | ||
2864 | GNU extensions: | |
2865 | ||
2866 | direct-declarator: | |
2867 | direct-declarator ( parameter-forward-declarations | |
2868 | parameter-type-list[opt] ) | |
2869 | ||
2870 | direct-abstract-declarator: | |
c22cacf3 | 2871 | direct-abstract-declarator[opt] ( parameter-forward-declarations |
27bf414c JM |
2872 | parameter-type-list[opt] ) |
2873 | ||
2874 | parameter-forward-declarations: | |
2875 | parameter-list ; | |
2876 | parameter-forward-declarations parameter-list ; | |
2877 | ||
2878 | The uses of attributes shown above are GNU extensions. | |
2879 | ||
2880 | Some forms of array declarator are not included in C99 in the | |
2881 | syntax for abstract declarators; these are disallowed elsewhere. | |
2882 | This may be a defect (DR#289). | |
2883 | ||
2884 | This function also accepts an omitted abstract declarator as being | |
2885 | an abstract declarator, although not part of the formal syntax. */ | |
2886 | ||
2887 | static struct c_declarator * | |
2888 | c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2889 | bool *seen_id) | |
2890 | { | |
2891 | /* Parse any initial pointer part. */ | |
2892 | if (c_parser_next_token_is (parser, CPP_MULT)) | |
2893 | { | |
2894 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
2895 | struct c_declarator *inner; | |
2896 | c_parser_consume_token (parser); | |
29ce73cb | 2897 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
27bf414c JM |
2898 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); |
2899 | if (inner == NULL) | |
2900 | return NULL; | |
2901 | else | |
2902 | return make_pointer_declarator (quals_attrs, inner); | |
2903 | } | |
2904 | /* Now we have a direct declarator, direct abstract declarator or | |
2905 | nothing (which counts as a direct abstract declarator here). */ | |
2906 | return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id); | |
2907 | } | |
2908 | ||
2909 | /* Parse a direct declarator or direct abstract declarator; arguments | |
2910 | as c_parser_declarator. */ | |
2911 | ||
2912 | static struct c_declarator * | |
2913 | c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind, | |
2914 | bool *seen_id) | |
2915 | { | |
2916 | /* The direct declarator must start with an identifier (possibly | |
2917 | omitted) or a parenthesized declarator (possibly abstract). In | |
2918 | an ordinary declarator, initial parentheses must start a | |
2919 | parenthesized declarator. In an abstract declarator or parameter | |
2920 | declarator, they could start a parenthesized declarator or a | |
2921 | parameter list. To tell which, the open parenthesis and any | |
2922 | following attributes must be read. If a declaration specifier | |
2923 | follows, then it is a parameter list; if the specifier is a | |
2924 | typedef name, there might be an ambiguity about redeclaring it, | |
2925 | which is resolved in the direction of treating it as a typedef | |
2926 | name. If a close parenthesis follows, it is also an empty | |
2927 | parameter list, as the syntax does not permit empty abstract | |
0fa2e4df | 2928 | declarators. Otherwise, it is a parenthesized declarator (in |
27bf414c JM |
2929 | which case the analysis may be repeated inside it, recursively). |
2930 | ||
2931 | ??? There is an ambiguity in a parameter declaration "int | |
2932 | (__attribute__((foo)) x)", where x is not a typedef name: it | |
2933 | could be an abstract declarator for a function, or declare x with | |
2934 | parentheses. The proper resolution of this ambiguity needs | |
2935 | documenting. At present we follow an accident of the old | |
2936 | parser's implementation, whereby the first parameter must have | |
2937 | some declaration specifiers other than just attributes. Thus as | |
0fa2e4df | 2938 | a parameter declaration it is treated as a parenthesized |
27bf414c JM |
2939 | parameter named x, and as an abstract declarator it is |
2940 | rejected. | |
2941 | ||
2942 | ??? Also following the old parser, attributes inside an empty | |
2943 | parameter list are ignored, making it a list not yielding a | |
2944 | prototype, rather than giving an error or making it have one | |
2945 | parameter with implicit type int. | |
2946 | ||
2947 | ??? Also following the old parser, typedef names may be | |
2948 | redeclared in declarators, but not Objective-C class names. */ | |
2949 | ||
2950 | if (kind != C_DTR_ABSTRACT | |
2951 | && c_parser_next_token_is (parser, CPP_NAME) | |
2952 | && ((type_seen_p | |
a6341d57 NP |
2953 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME |
2954 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
27bf414c JM |
2955 | || c_parser_peek_token (parser)->id_kind == C_ID_ID)) |
2956 | { | |
2957 | struct c_declarator *inner | |
2958 | = build_id_declarator (c_parser_peek_token (parser)->value); | |
2959 | *seen_id = true; | |
6037d88d | 2960 | inner->id_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
2961 | c_parser_consume_token (parser); |
2962 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2963 | } | |
2964 | ||
2965 | if (kind != C_DTR_NORMAL | |
2966 | && c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
2967 | { | |
2968 | struct c_declarator *inner = build_id_declarator (NULL_TREE); | |
2969 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
2970 | } | |
2971 | ||
2972 | /* Either we are at the end of an abstract declarator, or we have | |
2973 | parentheses. */ | |
2974 | ||
2975 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
2976 | { | |
2977 | tree attrs; | |
2978 | struct c_declarator *inner; | |
2979 | c_parser_consume_token (parser); | |
2980 | attrs = c_parser_attributes (parser); | |
2981 | if (kind != C_DTR_NORMAL | |
2982 | && (c_parser_next_token_starts_declspecs (parser) | |
2983 | || c_parser_next_token_is (parser, CPP_CLOSE_PAREN))) | |
2984 | { | |
2985 | struct c_arg_info *args | |
2986 | = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL, | |
2987 | attrs); | |
2988 | if (args == NULL) | |
2989 | return NULL; | |
2990 | else | |
2991 | { | |
2992 | inner | |
2993 | = build_function_declarator (args, | |
2994 | build_id_declarator (NULL_TREE)); | |
2995 | return c_parser_direct_declarator_inner (parser, *seen_id, | |
2996 | inner); | |
2997 | } | |
2998 | } | |
2999 | /* A parenthesized declarator. */ | |
3000 | inner = c_parser_declarator (parser, type_seen_p, kind, seen_id); | |
3001 | if (inner != NULL && attrs != NULL) | |
3002 | inner = build_attrs_declarator (attrs, inner); | |
3003 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3004 | { | |
3005 | c_parser_consume_token (parser); | |
3006 | if (inner == NULL) | |
3007 | return NULL; | |
3008 | else | |
3009 | return c_parser_direct_declarator_inner (parser, *seen_id, inner); | |
3010 | } | |
3011 | else | |
3012 | { | |
3013 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3014 | "expected %<)%>"); | |
3015 | return NULL; | |
3016 | } | |
3017 | } | |
3018 | else | |
3019 | { | |
3020 | if (kind == C_DTR_NORMAL) | |
3021 | { | |
3022 | c_parser_error (parser, "expected identifier or %<(%>"); | |
3023 | return NULL; | |
3024 | } | |
3025 | else | |
3026 | return build_id_declarator (NULL_TREE); | |
3027 | } | |
3028 | } | |
3029 | ||
3030 | /* Parse part of a direct declarator or direct abstract declarator, | |
3031 | given that some (in INNER) has already been parsed; ID_PRESENT is | |
3032 | true if an identifier is present, false for an abstract | |
3033 | declarator. */ | |
3034 | ||
3035 | static struct c_declarator * | |
3036 | c_parser_direct_declarator_inner (c_parser *parser, bool id_present, | |
3037 | struct c_declarator *inner) | |
3038 | { | |
3039 | /* Parse a sequence of array declarators and parameter lists. */ | |
3040 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
3041 | { | |
b8698a0f | 3042 | location_t brace_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3043 | struct c_declarator *declarator; |
3044 | struct c_declspecs *quals_attrs = build_null_declspecs (); | |
3045 | bool static_seen; | |
3046 | bool star_seen; | |
3047 | tree dimen; | |
3048 | c_parser_consume_token (parser); | |
29ce73cb | 3049 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
27bf414c JM |
3050 | static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC); |
3051 | if (static_seen) | |
3052 | c_parser_consume_token (parser); | |
3053 | if (static_seen && !quals_attrs->declspecs_seen_p) | |
29ce73cb | 3054 | c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id); |
27bf414c JM |
3055 | if (!quals_attrs->declspecs_seen_p) |
3056 | quals_attrs = NULL; | |
3057 | /* If "static" is present, there must be an array dimension. | |
3058 | Otherwise, there may be a dimension, "*", or no | |
3059 | dimension. */ | |
3060 | if (static_seen) | |
3061 | { | |
3062 | star_seen = false; | |
3063 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3064 | } | |
3065 | else | |
3066 | { | |
3067 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3068 | { | |
3069 | dimen = NULL_TREE; | |
3070 | star_seen = false; | |
3071 | } | |
3072 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
3073 | { | |
3074 | if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE) | |
3075 | { | |
3076 | dimen = NULL_TREE; | |
3077 | star_seen = true; | |
3078 | c_parser_consume_token (parser); | |
3079 | } | |
3080 | else | |
3081 | { | |
3082 | star_seen = false; | |
3083 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3084 | } | |
3085 | } | |
3086 | else | |
3087 | { | |
3088 | star_seen = false; | |
3089 | dimen = c_parser_expr_no_commas (parser, NULL).value; | |
3090 | } | |
3091 | } | |
3092 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3093 | c_parser_consume_token (parser); | |
3094 | else | |
3095 | { | |
3096 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3097 | "expected %<]%>"); | |
3098 | return NULL; | |
3099 | } | |
97e3c923 JJ |
3100 | if (dimen) |
3101 | mark_exp_read (dimen); | |
c2255bc4 AH |
3102 | declarator = build_array_declarator (brace_loc, dimen, quals_attrs, |
3103 | static_seen, star_seen); | |
52ffd86e MS |
3104 | if (declarator == NULL) |
3105 | return NULL; | |
6ac0194d | 3106 | inner = set_array_declarator_inner (declarator, inner); |
27bf414c JM |
3107 | return c_parser_direct_declarator_inner (parser, id_present, inner); |
3108 | } | |
3109 | else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
3110 | { | |
3111 | tree attrs; | |
3112 | struct c_arg_info *args; | |
3113 | c_parser_consume_token (parser); | |
3114 | attrs = c_parser_attributes (parser); | |
3115 | args = c_parser_parms_declarator (parser, id_present, attrs); | |
3116 | if (args == NULL) | |
3117 | return NULL; | |
3118 | else | |
3119 | { | |
3120 | inner = build_function_declarator (args, inner); | |
3121 | return c_parser_direct_declarator_inner (parser, id_present, inner); | |
3122 | } | |
3123 | } | |
3124 | return inner; | |
3125 | } | |
3126 | ||
3127 | /* Parse a parameter list or identifier list, including the closing | |
3128 | parenthesis but not the opening one. ATTRS are the attributes at | |
3129 | the start of the list. ID_LIST_OK is true if an identifier list is | |
3130 | acceptable; such a list must not have attributes at the start. */ | |
3131 | ||
3132 | static struct c_arg_info * | |
3133 | c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs) | |
3134 | { | |
3135 | push_scope (); | |
3136 | declare_parm_level (); | |
3137 | /* If the list starts with an identifier, it is an identifier list. | |
3138 | Otherwise, it is either a prototype list or an empty list. */ | |
3139 | if (id_list_ok | |
3140 | && !attrs | |
3141 | && c_parser_next_token_is (parser, CPP_NAME) | |
29ce73cb PB |
3142 | && c_parser_peek_token (parser)->id_kind == C_ID_ID |
3143 | ||
3144 | /* Look ahead to detect typos in type names. */ | |
3145 | && c_parser_peek_2nd_token (parser)->type != CPP_NAME | |
3146 | && c_parser_peek_2nd_token (parser)->type != CPP_MULT | |
3147 | && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_PAREN | |
3148 | && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_SQUARE) | |
27bf414c | 3149 | { |
7fa3585c | 3150 | tree list = NULL_TREE, *nextp = &list; |
27bf414c JM |
3151 | while (c_parser_next_token_is (parser, CPP_NAME) |
3152 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
3153 | { | |
7fa3585c GK |
3154 | *nextp = build_tree_list (NULL_TREE, |
3155 | c_parser_peek_token (parser)->value); | |
3156 | nextp = & TREE_CHAIN (*nextp); | |
27bf414c JM |
3157 | c_parser_consume_token (parser); |
3158 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
3159 | break; | |
3160 | c_parser_consume_token (parser); | |
3161 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3162 | { | |
3163 | c_parser_error (parser, "expected identifier"); | |
3164 | break; | |
3165 | } | |
3166 | } | |
3167 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3168 | { | |
b3399d18 | 3169 | struct c_arg_info *ret = build_arg_info (); |
27bf414c | 3170 | ret->types = list; |
27bf414c JM |
3171 | c_parser_consume_token (parser); |
3172 | pop_scope (); | |
3173 | return ret; | |
3174 | } | |
3175 | else | |
3176 | { | |
3177 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3178 | "expected %<)%>"); | |
3179 | pop_scope (); | |
3180 | return NULL; | |
3181 | } | |
3182 | } | |
3183 | else | |
3184 | { | |
a04a722b JM |
3185 | struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs, |
3186 | NULL); | |
27bf414c JM |
3187 | pop_scope (); |
3188 | return ret; | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | /* Parse a parameter list (possibly empty), including the closing | |
3193 | parenthesis but not the opening one. ATTRS are the attributes at | |
a04a722b JM |
3194 | the start of the list. EXPR is NULL or an expression that needs to |
3195 | be evaluated for the side effects of array size expressions in the | |
3196 | parameters. */ | |
27bf414c JM |
3197 | |
3198 | static struct c_arg_info * | |
a04a722b | 3199 | c_parser_parms_list_declarator (c_parser *parser, tree attrs, tree expr) |
27bf414c | 3200 | { |
09a1e889 | 3201 | bool bad_parm = false; |
a04a722b | 3202 | |
27bf414c JM |
3203 | /* ??? Following the old parser, forward parameter declarations may |
3204 | use abstract declarators, and if no real parameter declarations | |
3205 | follow the forward declarations then this is not diagnosed. Also | |
3206 | note as above that attributes are ignored as the only contents of | |
3207 | the parentheses, or as the only contents after forward | |
3208 | declarations. */ | |
3209 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3210 | { | |
b3399d18 | 3211 | struct c_arg_info *ret = build_arg_info (); |
27bf414c JM |
3212 | c_parser_consume_token (parser); |
3213 | return ret; | |
3214 | } | |
3215 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3216 | { | |
b3399d18 | 3217 | struct c_arg_info *ret = build_arg_info (); |
6637388f TG |
3218 | |
3219 | if (flag_allow_parameterless_variadic_functions) | |
3220 | { | |
3221 | /* F (...) is allowed. */ | |
3222 | ret->types = NULL_TREE; | |
3223 | } | |
3224 | else | |
3225 | { | |
3226 | /* Suppress -Wold-style-definition for this case. */ | |
3227 | ret->types = error_mark_node; | |
3228 | error_at (c_parser_peek_token (parser)->location, | |
3229 | "ISO C requires a named argument before %<...%>"); | |
3230 | } | |
27bf414c JM |
3231 | c_parser_consume_token (parser); |
3232 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3233 | { | |
3234 | c_parser_consume_token (parser); | |
3235 | return ret; | |
3236 | } | |
3237 | else | |
3238 | { | |
3239 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3240 | "expected %<)%>"); | |
3241 | return NULL; | |
3242 | } | |
3243 | } | |
3244 | /* Nonempty list of parameters, either terminated with semicolon | |
3245 | (forward declarations; recurse) or with close parenthesis (normal | |
3246 | function) or with ", ... )" (variadic function). */ | |
3247 | while (true) | |
3248 | { | |
3249 | /* Parse a parameter. */ | |
3250 | struct c_parm *parm = c_parser_parameter_declaration (parser, attrs); | |
3251 | attrs = NULL_TREE; | |
09a1e889 SZ |
3252 | if (parm == NULL) |
3253 | bad_parm = true; | |
3254 | else | |
a04a722b | 3255 | push_parm_decl (parm, &expr); |
27bf414c JM |
3256 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3257 | { | |
3258 | tree new_attrs; | |
3259 | c_parser_consume_token (parser); | |
91d975b8 | 3260 | mark_forward_parm_decls (); |
27bf414c | 3261 | new_attrs = c_parser_attributes (parser); |
a04a722b | 3262 | return c_parser_parms_list_declarator (parser, new_attrs, expr); |
27bf414c JM |
3263 | } |
3264 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3265 | { | |
3266 | c_parser_consume_token (parser); | |
09a1e889 | 3267 | if (bad_parm) |
a04a722b | 3268 | return NULL; |
09a1e889 | 3269 | else |
a04a722b | 3270 | return get_parm_info (false, expr); |
27bf414c JM |
3271 | } |
3272 | if (!c_parser_require (parser, CPP_COMMA, | |
3273 | "expected %<;%>, %<,%> or %<)%>")) | |
3274 | { | |
3275 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
3276 | return NULL; | |
3277 | } | |
3278 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3279 | { | |
3280 | c_parser_consume_token (parser); | |
3281 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3282 | { | |
3283 | c_parser_consume_token (parser); | |
09a1e889 | 3284 | if (bad_parm) |
a04a722b | 3285 | return NULL; |
09a1e889 | 3286 | else |
a04a722b | 3287 | return get_parm_info (true, expr); |
27bf414c JM |
3288 | } |
3289 | else | |
3290 | { | |
3291 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
3292 | "expected %<)%>"); | |
3293 | return NULL; | |
3294 | } | |
3295 | } | |
3296 | } | |
3297 | } | |
3298 | ||
3299 | /* Parse a parameter declaration. ATTRS are the attributes at the | |
3300 | start of the declaration if it is the first parameter. */ | |
3301 | ||
3302 | static struct c_parm * | |
3303 | c_parser_parameter_declaration (c_parser *parser, tree attrs) | |
3304 | { | |
3305 | struct c_declspecs *specs; | |
3306 | struct c_declarator *declarator; | |
3307 | tree prefix_attrs; | |
3308 | tree postfix_attrs = NULL_TREE; | |
3309 | bool dummy = false; | |
51a1aacf TG |
3310 | |
3311 | /* Accept #pragmas between parameter declarations. */ | |
3312 | while (c_parser_next_token_is (parser, CPP_PRAGMA)) | |
3313 | c_parser_pragma (parser, pragma_external); | |
3314 | ||
27bf414c JM |
3315 | if (!c_parser_next_token_starts_declspecs (parser)) |
3316 | { | |
09a1e889 SZ |
3317 | c_token *token = c_parser_peek_token (parser); |
3318 | if (parser->error) | |
3319 | return NULL; | |
3320 | c_parser_set_source_position_from_token (token); | |
29ce73cb | 3321 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_type)) |
09a1e889 SZ |
3322 | { |
3323 | error ("unknown type name %qE", token->value); | |
3324 | parser->error = true; | |
3325 | } | |
27bf414c JM |
3326 | /* ??? In some Objective-C cases '...' isn't applicable so there |
3327 | should be a different message. */ | |
09a1e889 SZ |
3328 | else |
3329 | c_parser_error (parser, | |
3330 | "expected declaration specifiers or %<...%>"); | |
27bf414c JM |
3331 | c_parser_skip_to_end_of_parameter (parser); |
3332 | return NULL; | |
3333 | } | |
3334 | specs = build_null_declspecs (); | |
3335 | if (attrs) | |
3336 | { | |
0b2c4be5 | 3337 | declspecs_add_attrs (input_location, specs, attrs); |
27bf414c JM |
3338 | attrs = NULL_TREE; |
3339 | } | |
29ce73cb | 3340 | c_parser_declspecs (parser, specs, true, true, true, cla_nonabstract_decl); |
27bf414c JM |
3341 | finish_declspecs (specs); |
3342 | pending_xref_error (); | |
3343 | prefix_attrs = specs->attrs; | |
3344 | specs->attrs = NULL_TREE; | |
9e5b2115 PB |
3345 | declarator = c_parser_declarator (parser, |
3346 | specs->typespec_kind != ctsk_none, | |
27bf414c JM |
3347 | C_DTR_PARM, &dummy); |
3348 | if (declarator == NULL) | |
3349 | { | |
3350 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
3351 | return NULL; | |
3352 | } | |
3353 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
3354 | postfix_attrs = c_parser_attributes (parser); | |
3355 | return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs), | |
3356 | declarator); | |
3357 | } | |
3358 | ||
3359 | /* Parse a string literal in an asm expression. It should not be | |
3360 | translated, and wide string literals are an error although | |
3361 | permitted by the syntax. This is a GNU extension. | |
3362 | ||
3363 | asm-string-literal: | |
3364 | string-literal | |
3365 | ||
3366 | ??? At present, following the old parser, the caller needs to have | |
46c2514e TT |
3367 | set lex_untranslated_string to 1. It would be better to follow the |
3368 | C++ parser rather than using this kludge. */ | |
27bf414c JM |
3369 | |
3370 | static tree | |
3371 | c_parser_asm_string_literal (c_parser *parser) | |
3372 | { | |
3373 | tree str; | |
87f9e23d TT |
3374 | int save_flag = warn_overlength_strings; |
3375 | warn_overlength_strings = 0; | |
27bf414c JM |
3376 | if (c_parser_next_token_is (parser, CPP_STRING)) |
3377 | { | |
3378 | str = c_parser_peek_token (parser)->value; | |
3379 | c_parser_consume_token (parser); | |
3380 | } | |
3381 | else if (c_parser_next_token_is (parser, CPP_WSTRING)) | |
3382 | { | |
3ba09659 AH |
3383 | error_at (c_parser_peek_token (parser)->location, |
3384 | "wide string literal in %<asm%>"); | |
27bf414c JM |
3385 | str = build_string (1, ""); |
3386 | c_parser_consume_token (parser); | |
3387 | } | |
3388 | else | |
3389 | { | |
3390 | c_parser_error (parser, "expected string literal"); | |
3391 | str = NULL_TREE; | |
3392 | } | |
87f9e23d | 3393 | warn_overlength_strings = save_flag; |
27bf414c JM |
3394 | return str; |
3395 | } | |
3396 | ||
3397 | /* Parse a simple asm expression. This is used in restricted | |
3398 | contexts, where a full expression with inputs and outputs does not | |
3399 | make sense. This is a GNU extension. | |
3400 | ||
3401 | simple-asm-expr: | |
3402 | asm ( asm-string-literal ) | |
3403 | */ | |
3404 | ||
3405 | static tree | |
3406 | c_parser_simple_asm_expr (c_parser *parser) | |
3407 | { | |
3408 | tree str; | |
3409 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); | |
3410 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
3411 | lex_untranslated_string kludge. */ |
3412 | parser->lex_untranslated_string = true; | |
27bf414c JM |
3413 | c_parser_consume_token (parser); |
3414 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3415 | { | |
46c2514e | 3416 | parser->lex_untranslated_string = false; |
27bf414c JM |
3417 | return NULL_TREE; |
3418 | } | |
3419 | str = c_parser_asm_string_literal (parser); | |
46c2514e | 3420 | parser->lex_untranslated_string = false; |
27bf414c JM |
3421 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
3422 | { | |
3423 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
3424 | return NULL_TREE; | |
3425 | } | |
3426 | return str; | |
3427 | } | |
3428 | ||
0a35513e AH |
3429 | static tree |
3430 | c_parser_attribute_any_word (c_parser *parser) | |
3431 | { | |
3432 | tree attr_name = NULL_TREE; | |
3433 | ||
3434 | if (c_parser_next_token_is (parser, CPP_KEYWORD)) | |
3435 | { | |
3436 | /* ??? See comment above about what keywords are accepted here. */ | |
3437 | bool ok; | |
3438 | switch (c_parser_peek_token (parser)->keyword) | |
3439 | { | |
3440 | case RID_STATIC: | |
3441 | case RID_UNSIGNED: | |
3442 | case RID_LONG: | |
3443 | case RID_INT128: | |
3444 | case RID_CONST: | |
3445 | case RID_EXTERN: | |
3446 | case RID_REGISTER: | |
3447 | case RID_TYPEDEF: | |
3448 | case RID_SHORT: | |
3449 | case RID_INLINE: | |
3450 | case RID_NORETURN: | |
3451 | case RID_VOLATILE: | |
3452 | case RID_SIGNED: | |
3453 | case RID_AUTO: | |
3454 | case RID_RESTRICT: | |
3455 | case RID_COMPLEX: | |
3456 | case RID_THREAD: | |
3457 | case RID_INT: | |
3458 | case RID_CHAR: | |
3459 | case RID_FLOAT: | |
3460 | case RID_DOUBLE: | |
3461 | case RID_VOID: | |
3462 | case RID_DFLOAT32: | |
3463 | case RID_DFLOAT64: | |
3464 | case RID_DFLOAT128: | |
3465 | case RID_BOOL: | |
3466 | case RID_FRACT: | |
3467 | case RID_ACCUM: | |
3468 | case RID_SAT: | |
3469 | case RID_TRANSACTION_ATOMIC: | |
3470 | case RID_TRANSACTION_CANCEL: | |
3471 | ok = true; | |
3472 | break; | |
3473 | default: | |
3474 | ok = false; | |
3475 | break; | |
3476 | } | |
3477 | if (!ok) | |
3478 | return NULL_TREE; | |
3479 | ||
3480 | /* Accept __attribute__((__const)) as __attribute__((const)) etc. */ | |
3481 | attr_name = ridpointers[(int) c_parser_peek_token (parser)->keyword]; | |
3482 | } | |
3483 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
3484 | attr_name = c_parser_peek_token (parser)->value; | |
3485 | ||
3486 | return attr_name; | |
3487 | } | |
3488 | ||
27bf414c JM |
3489 | /* Parse (possibly empty) attributes. This is a GNU extension. |
3490 | ||
3491 | attributes: | |
3492 | empty | |
3493 | attributes attribute | |
3494 | ||
3495 | attribute: | |
3496 | __attribute__ ( ( attribute-list ) ) | |
3497 | ||
3498 | attribute-list: | |
3499 | attrib | |
3500 | attribute_list , attrib | |
3501 | ||
3502 | attrib: | |
3503 | empty | |
3504 | any-word | |
3505 | any-word ( identifier ) | |
3506 | any-word ( identifier , nonempty-expr-list ) | |
3507 | any-word ( expr-list ) | |
3508 | ||
3509 | where the "identifier" must not be declared as a type, and | |
3510 | "any-word" may be any identifier (including one declared as a | |
3511 | type), a reserved word storage class specifier, type specifier or | |
3512 | type qualifier. ??? This still leaves out most reserved keywords | |
3513 | (following the old parser), shouldn't we include them, and why not | |
3514 | allow identifiers declared as types to start the arguments? */ | |
3515 | ||
3516 | static tree | |
3517 | c_parser_attributes (c_parser *parser) | |
3518 | { | |
3519 | tree attrs = NULL_TREE; | |
3520 | while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
3521 | { | |
3522 | /* ??? Follow the C++ parser rather than using the | |
46c2514e TT |
3523 | lex_untranslated_string kludge. */ |
3524 | parser->lex_untranslated_string = true; | |
27bf414c JM |
3525 | c_parser_consume_token (parser); |
3526 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3527 | { | |
46c2514e | 3528 | parser->lex_untranslated_string = false; |
27bf414c JM |
3529 | return attrs; |
3530 | } | |
3531 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
3532 | { | |
46c2514e | 3533 | parser->lex_untranslated_string = false; |
27bf414c JM |
3534 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
3535 | return attrs; | |
3536 | } | |
3537 | /* Parse the attribute list. */ | |
3538 | while (c_parser_next_token_is (parser, CPP_COMMA) | |
3539 | || c_parser_next_token_is (parser, CPP_NAME) | |
3540 | || c_parser_next_token_is (parser, CPP_KEYWORD)) | |
3541 | { | |
3542 | tree attr, attr_name, attr_args; | |
bbbbb16a | 3543 | VEC(tree,gc) *expr_list; |
27bf414c JM |
3544 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
3545 | { | |
3546 | c_parser_consume_token (parser); | |
3547 | continue; | |
3548 | } | |
0a35513e AH |
3549 | |
3550 | attr_name = c_parser_attribute_any_word (parser); | |
3551 | if (attr_name == NULL) | |
3552 | break; | |
27bf414c JM |
3553 | c_parser_consume_token (parser); |
3554 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) | |
3555 | { | |
3556 | attr = build_tree_list (attr_name, NULL_TREE); | |
3557 | attrs = chainon (attrs, attr); | |
3558 | continue; | |
3559 | } | |
3560 | c_parser_consume_token (parser); | |
3561 | /* Parse the attribute contents. If they start with an | |
3562 | identifier which is followed by a comma or close | |
3563 | parenthesis, then the arguments start with that | |
91ebb981 IS |
3564 | identifier; otherwise they are an expression list. |
3565 | In objective-c the identifier may be a classname. */ | |
27bf414c | 3566 | if (c_parser_next_token_is (parser, CPP_NAME) |
91ebb981 IS |
3567 | && (c_parser_peek_token (parser)->id_kind == C_ID_ID |
3568 | || (c_dialect_objc () | |
3569 | && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
27bf414c JM |
3570 | && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA) |
3571 | || (c_parser_peek_2nd_token (parser)->type | |
3572 | == CPP_CLOSE_PAREN))) | |
3573 | { | |
3574 | tree arg1 = c_parser_peek_token (parser)->value; | |
3575 | c_parser_consume_token (parser); | |
3576 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3577 | attr_args = build_tree_list (NULL_TREE, arg1); | |
3578 | else | |
3579 | { | |
bbbbb16a | 3580 | tree tree_list; |
27bf414c | 3581 | c_parser_consume_token (parser); |
1a4049e7 | 3582 | expr_list = c_parser_expr_list (parser, false, true, |
3a785c97 | 3583 | NULL, NULL, NULL); |
c166b898 | 3584 | tree_list = build_tree_list_vec (expr_list); |
bbbbb16a | 3585 | attr_args = tree_cons (NULL_TREE, arg1, tree_list); |
c166b898 | 3586 | release_tree_vector (expr_list); |
27bf414c JM |
3587 | } |
3588 | } | |
3589 | else | |
3590 | { | |
3591 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3592 | attr_args = NULL_TREE; | |
3593 | else | |
bbbbb16a | 3594 | { |
1a4049e7 | 3595 | expr_list = c_parser_expr_list (parser, false, true, |
3a785c97 | 3596 | NULL, NULL, NULL); |
c166b898 ILT |
3597 | attr_args = build_tree_list_vec (expr_list); |
3598 | release_tree_vector (expr_list); | |
bbbbb16a | 3599 | } |
27bf414c JM |
3600 | } |
3601 | attr = build_tree_list (attr_name, attr_args); | |
3602 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3603 | c_parser_consume_token (parser); | |
3604 | else | |
3605 | { | |
46c2514e | 3606 | parser->lex_untranslated_string = false; |
27bf414c JM |
3607 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3608 | "expected %<)%>"); | |
3609 | return attrs; | |
3610 | } | |
3611 | attrs = chainon (attrs, attr); | |
3612 | } | |
3613 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3614 | c_parser_consume_token (parser); | |
3615 | else | |
3616 | { | |
46c2514e | 3617 | parser->lex_untranslated_string = false; |
27bf414c JM |
3618 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3619 | "expected %<)%>"); | |
3620 | return attrs; | |
3621 | } | |
3622 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
3623 | c_parser_consume_token (parser); | |
3624 | else | |
3625 | { | |
46c2514e | 3626 | parser->lex_untranslated_string = false; |
27bf414c JM |
3627 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
3628 | "expected %<)%>"); | |
3629 | return attrs; | |
3630 | } | |
46c2514e | 3631 | parser->lex_untranslated_string = false; |
27bf414c JM |
3632 | } |
3633 | return attrs; | |
3634 | } | |
3635 | ||
3636 | /* Parse a type name (C90 6.5.5, C99 6.7.6). | |
3637 | ||
3638 | type-name: | |
3639 | specifier-qualifier-list abstract-declarator[opt] | |
3640 | */ | |
3641 | ||
3642 | static struct c_type_name * | |
3643 | c_parser_type_name (c_parser *parser) | |
3644 | { | |
3645 | struct c_declspecs *specs = build_null_declspecs (); | |
3646 | struct c_declarator *declarator; | |
3647 | struct c_type_name *ret; | |
3648 | bool dummy = false; | |
29ce73cb | 3649 | c_parser_declspecs (parser, specs, false, true, true, cla_prefer_type); |
27bf414c JM |
3650 | if (!specs->declspecs_seen_p) |
3651 | { | |
3652 | c_parser_error (parser, "expected specifier-qualifier-list"); | |
3653 | return NULL; | |
3654 | } | |
29ce73cb PB |
3655 | if (specs->type != error_mark_node) |
3656 | { | |
3657 | pending_xref_error (); | |
3658 | finish_declspecs (specs); | |
3659 | } | |
9e5b2115 PB |
3660 | declarator = c_parser_declarator (parser, |
3661 | specs->typespec_kind != ctsk_none, | |
27bf414c JM |
3662 | C_DTR_ABSTRACT, &dummy); |
3663 | if (declarator == NULL) | |
3664 | return NULL; | |
3665 | ret = XOBNEW (&parser_obstack, struct c_type_name); | |
3666 | ret->specs = specs; | |
3667 | ret->declarator = declarator; | |
3668 | return ret; | |
3669 | } | |
3670 | ||
3671 | /* Parse an initializer (C90 6.5.7, C99 6.7.8). | |
3672 | ||
3673 | initializer: | |
3674 | assignment-expression | |
3675 | { initializer-list } | |
3676 | { initializer-list , } | |
3677 | ||
3678 | initializer-list: | |
3679 | designation[opt] initializer | |
3680 | initializer-list , designation[opt] initializer | |
3681 | ||
3682 | designation: | |
3683 | designator-list = | |
3684 | ||
3685 | designator-list: | |
3686 | designator | |
3687 | designator-list designator | |
3688 | ||
3689 | designator: | |
3690 | array-designator | |
3691 | . identifier | |
3692 | ||
3693 | array-designator: | |
3694 | [ constant-expression ] | |
3695 | ||
3696 | GNU extensions: | |
3697 | ||
3698 | initializer: | |
3699 | { } | |
3700 | ||
3701 | designation: | |
3702 | array-designator | |
3703 | identifier : | |
3704 | ||
3705 | array-designator: | |
3706 | [ constant-expression ... constant-expression ] | |
3707 | ||
3708 | Any expression without commas is accepted in the syntax for the | |
3709 | constant-expressions, with non-constant expressions rejected later. | |
3710 | ||
3711 | This function is only used for top-level initializers; for nested | |
3712 | ones, see c_parser_initval. */ | |
3713 | ||
3714 | static struct c_expr | |
3715 | c_parser_initializer (c_parser *parser) | |
3716 | { | |
3717 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
3718 | return c_parser_braced_init (parser, NULL_TREE, false); | |
3719 | else | |
46bdb9cf JM |
3720 | { |
3721 | struct c_expr ret; | |
c2255bc4 | 3722 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3723 | ret = c_parser_expr_no_commas (parser, NULL); |
3724 | if (TREE_CODE (ret.value) != STRING_CST | |
3725 | && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR) | |
ebfbbdc5 | 3726 | ret = default_function_array_read_conversion (loc, ret); |
46bdb9cf JM |
3727 | return ret; |
3728 | } | |
27bf414c JM |
3729 | } |
3730 | ||
3731 | /* Parse a braced initializer list. TYPE is the type specified for a | |
3732 | compound literal, and NULL_TREE for other initializers and for | |
3733 | nested braced lists. NESTED_P is true for nested braced lists, | |
3734 | false for the list of a compound literal or the list that is the | |
3735 | top-level initializer in a declaration. */ | |
3736 | ||
3737 | static struct c_expr | |
3738 | c_parser_braced_init (c_parser *parser, tree type, bool nested_p) | |
3739 | { | |
a1e3b3d9 LB |
3740 | struct c_expr ret; |
3741 | struct obstack braced_init_obstack; | |
c7412148 | 3742 | location_t brace_loc = c_parser_peek_token (parser)->location; |
a1e3b3d9 | 3743 | gcc_obstack_init (&braced_init_obstack); |
27bf414c JM |
3744 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); |
3745 | c_parser_consume_token (parser); | |
3746 | if (nested_p) | |
a1e3b3d9 | 3747 | push_init_level (0, &braced_init_obstack); |
27bf414c JM |
3748 | else |
3749 | really_start_incremental_init (type); | |
3750 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3751 | { | |
c1771a20 | 3752 | pedwarn (brace_loc, OPT_Wpedantic, "ISO C forbids empty initializer braces"); |
27bf414c JM |
3753 | } |
3754 | else | |
3755 | { | |
3756 | /* Parse a non-empty initializer list, possibly with a trailing | |
3757 | comma. */ | |
3758 | while (true) | |
3759 | { | |
a1e3b3d9 | 3760 | c_parser_initelt (parser, &braced_init_obstack); |
27bf414c JM |
3761 | if (parser->error) |
3762 | break; | |
3763 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
3764 | c_parser_consume_token (parser); | |
3765 | else | |
3766 | break; | |
3767 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
3768 | break; | |
3769 | } | |
3770 | } | |
3771 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
3772 | { | |
27bf414c JM |
3773 | ret.value = error_mark_node; |
3774 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 3775 | ret.original_type = NULL; |
27bf414c | 3776 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>"); |
a1e3b3d9 LB |
3777 | pop_init_level (0, &braced_init_obstack); |
3778 | obstack_free (&braced_init_obstack, NULL); | |
27bf414c JM |
3779 | return ret; |
3780 | } | |
3781 | c_parser_consume_token (parser); | |
a1e3b3d9 LB |
3782 | ret = pop_init_level (0, &braced_init_obstack); |
3783 | obstack_free (&braced_init_obstack, NULL); | |
3784 | return ret; | |
27bf414c JM |
3785 | } |
3786 | ||
3787 | /* Parse a nested initializer, including designators. */ | |
3788 | ||
3789 | static void | |
a1e3b3d9 | 3790 | c_parser_initelt (c_parser *parser, struct obstack * braced_init_obstack) |
27bf414c JM |
3791 | { |
3792 | /* Parse any designator or designator list. A single array | |
3793 | designator may have the subsequent "=" omitted in GNU C, but a | |
3794 | longer list or a structure member designator may not. */ | |
3795 | if (c_parser_next_token_is (parser, CPP_NAME) | |
3796 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON) | |
3797 | { | |
3798 | /* Old-style structure member designator. */ | |
a1e3b3d9 LB |
3799 | set_init_label (c_parser_peek_token (parser)->value, |
3800 | braced_init_obstack); | |
fcf73884 | 3801 | /* Use the colon as the error location. */ |
c1771a20 | 3802 | pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 3803 | "obsolete use of designated initializer with %<:%>"); |
27bf414c JM |
3804 | c_parser_consume_token (parser); |
3805 | c_parser_consume_token (parser); | |
3806 | } | |
3807 | else | |
3808 | { | |
3809 | /* des_seen is 0 if there have been no designators, 1 if there | |
3810 | has been a single array designator and 2 otherwise. */ | |
3811 | int des_seen = 0; | |
c7412148 | 3812 | /* Location of a designator. */ |
922f2908 | 3813 | location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3814 | while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE) |
3815 | || c_parser_next_token_is (parser, CPP_DOT)) | |
3816 | { | |
3817 | int des_prev = des_seen; | |
c7412148 TT |
3818 | if (!des_seen) |
3819 | des_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
3820 | if (des_seen < 2) |
3821 | des_seen++; | |
3822 | if (c_parser_next_token_is (parser, CPP_DOT)) | |
3823 | { | |
3824 | des_seen = 2; | |
3825 | c_parser_consume_token (parser); | |
3826 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
3827 | { | |
a1e3b3d9 LB |
3828 | set_init_label (c_parser_peek_token (parser)->value, |
3829 | braced_init_obstack); | |
27bf414c JM |
3830 | c_parser_consume_token (parser); |
3831 | } | |
3832 | else | |
3833 | { | |
3834 | struct c_expr init; | |
3835 | init.value = error_mark_node; | |
3836 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3837 | init.original_type = NULL; |
27bf414c JM |
3838 | c_parser_error (parser, "expected identifier"); |
3839 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
a1e3b3d9 | 3840 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
3841 | return; |
3842 | } | |
3843 | } | |
3844 | else | |
3845 | { | |
3846 | tree first, second; | |
922f2908 | 3847 | location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
3848 | /* ??? Following the old parser, [ objc-receiver |
3849 | objc-message-args ] is accepted as an initializer, | |
3850 | being distinguished from a designator by what follows | |
3851 | the first assignment expression inside the square | |
3852 | brackets, but after a first array designator a | |
3853 | subsequent square bracket is for Objective-C taken to | |
3854 | start an expression, using the obsolete form of | |
3855 | designated initializer without '=', rather than | |
3856 | possibly being a second level of designation: in LALR | |
3857 | terms, the '[' is shifted rather than reducing | |
3858 | designator to designator-list. */ | |
3859 | if (des_prev == 1 && c_dialect_objc ()) | |
3860 | { | |
3861 | des_seen = des_prev; | |
3862 | break; | |
3863 | } | |
3864 | if (des_prev == 0 && c_dialect_objc ()) | |
3865 | { | |
3866 | /* This might be an array designator or an | |
3867 | Objective-C message expression. If the former, | |
3868 | continue parsing here; if the latter, parse the | |
3869 | remainder of the initializer given the starting | |
3870 | primary-expression. ??? It might make sense to | |
3871 | distinguish when des_prev == 1 as well; see | |
3872 | previous comment. */ | |
3873 | tree rec, args; | |
3874 | struct c_expr mexpr; | |
3875 | c_parser_consume_token (parser); | |
3876 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
3877 | && ((c_parser_peek_token (parser)->id_kind | |
3878 | == C_ID_TYPENAME) | |
3879 | || (c_parser_peek_token (parser)->id_kind | |
3880 | == C_ID_CLASSNAME))) | |
3881 | { | |
3882 | /* Type name receiver. */ | |
3883 | tree id = c_parser_peek_token (parser)->value; | |
3884 | c_parser_consume_token (parser); | |
3885 | rec = objc_get_class_reference (id); | |
3886 | goto parse_message_args; | |
3887 | } | |
3888 | first = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3889 | mark_exp_read (first); |
27bf414c JM |
3890 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS) |
3891 | || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3892 | goto array_desig_after_first; | |
3893 | /* Expression receiver. So far only one part | |
3894 | without commas has been parsed; there might be | |
3895 | more of the expression. */ | |
3896 | rec = first; | |
3897 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
3898 | { | |
f2a71bbc | 3899 | struct c_expr next; |
c2255bc4 AH |
3900 | location_t comma_loc, exp_loc; |
3901 | comma_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 3902 | c_parser_consume_token (parser); |
c2255bc4 | 3903 | exp_loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 3904 | next = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 JJ |
3905 | next = default_function_array_read_conversion (exp_loc, |
3906 | next); | |
c2255bc4 | 3907 | rec = build_compound_expr (comma_loc, rec, next.value); |
27bf414c JM |
3908 | } |
3909 | parse_message_args: | |
3910 | /* Now parse the objc-message-args. */ | |
3911 | args = c_parser_objc_message_args (parser); | |
3912 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3913 | "expected %<]%>"); | |
3914 | mexpr.value | |
eb345401 | 3915 | = objc_build_message_expr (rec, args); |
27bf414c | 3916 | mexpr.original_code = ERROR_MARK; |
6866c6e8 | 3917 | mexpr.original_type = NULL; |
27bf414c JM |
3918 | /* Now parse and process the remainder of the |
3919 | initializer, starting with this message | |
3920 | expression as a primary-expression. */ | |
a1e3b3d9 | 3921 | c_parser_initval (parser, &mexpr, braced_init_obstack); |
27bf414c JM |
3922 | return; |
3923 | } | |
3924 | c_parser_consume_token (parser); | |
3925 | first = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3926 | mark_exp_read (first); |
27bf414c JM |
3927 | array_desig_after_first: |
3928 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
3929 | { | |
c7412148 | 3930 | ellipsis_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
3931 | c_parser_consume_token (parser); |
3932 | second = c_parser_expr_no_commas (parser, NULL).value; | |
ebfbbdc5 | 3933 | mark_exp_read (second); |
27bf414c JM |
3934 | } |
3935 | else | |
3936 | second = NULL_TREE; | |
3937 | if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE)) | |
3938 | { | |
3939 | c_parser_consume_token (parser); | |
a1e3b3d9 | 3940 | set_init_index (first, second, braced_init_obstack); |
fcf73884 | 3941 | if (second) |
c1771a20 | 3942 | pedwarn (ellipsis_loc, OPT_Wpedantic, |
509c9d60 | 3943 | "ISO C forbids specifying range of elements to initialize"); |
27bf414c JM |
3944 | } |
3945 | else | |
3946 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
3947 | "expected %<]%>"); | |
3948 | } | |
3949 | } | |
3950 | if (des_seen >= 1) | |
3951 | { | |
3952 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
3953 | { | |
fcf73884 | 3954 | if (!flag_isoc99) |
c1771a20 | 3955 | pedwarn (des_loc, OPT_Wpedantic, |
509c9d60 | 3956 | "ISO C90 forbids specifying subobject to initialize"); |
27bf414c JM |
3957 | c_parser_consume_token (parser); |
3958 | } | |
3959 | else | |
3960 | { | |
3961 | if (des_seen == 1) | |
c1771a20 | 3962 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 3963 | "obsolete use of designated initializer without %<=%>"); |
27bf414c JM |
3964 | else |
3965 | { | |
3966 | struct c_expr init; | |
3967 | init.value = error_mark_node; | |
3968 | init.original_code = ERROR_MARK; | |
6866c6e8 | 3969 | init.original_type = NULL; |
27bf414c JM |
3970 | c_parser_error (parser, "expected %<=%>"); |
3971 | c_parser_skip_until_found (parser, CPP_COMMA, NULL); | |
a1e3b3d9 | 3972 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
3973 | return; |
3974 | } | |
3975 | } | |
3976 | } | |
3977 | } | |
a1e3b3d9 | 3978 | c_parser_initval (parser, NULL, braced_init_obstack); |
27bf414c JM |
3979 | } |
3980 | ||
3981 | /* Parse a nested initializer; as c_parser_initializer but parses | |
3982 | initializers within braced lists, after any designators have been | |
3983 | applied. If AFTER is not NULL then it is an Objective-C message | |
3984 | expression which is the primary-expression starting the | |
3985 | initializer. */ | |
3986 | ||
3987 | static void | |
a1e3b3d9 LB |
3988 | c_parser_initval (c_parser *parser, struct c_expr *after, |
3989 | struct obstack * braced_init_obstack) | |
27bf414c JM |
3990 | { |
3991 | struct c_expr init; | |
3992 | gcc_assert (!after || c_dialect_objc ()); | |
3993 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after) | |
3994 | init = c_parser_braced_init (parser, NULL_TREE, true); | |
3995 | else | |
46bdb9cf | 3996 | { |
c2255bc4 | 3997 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf JM |
3998 | init = c_parser_expr_no_commas (parser, after); |
3999 | if (init.value != NULL_TREE | |
4000 | && TREE_CODE (init.value) != STRING_CST | |
4001 | && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR) | |
ebfbbdc5 | 4002 | init = default_function_array_read_conversion (loc, init); |
46bdb9cf | 4003 | } |
a1e3b3d9 | 4004 | process_init_element (init, false, braced_init_obstack); |
27bf414c JM |
4005 | } |
4006 | ||
4007 | /* Parse a compound statement (possibly a function body) (C90 6.6.2, | |
4008 | C99 6.8.2). | |
4009 | ||
4010 | compound-statement: | |
4011 | { block-item-list[opt] } | |
4012 | { label-declarations block-item-list } | |
4013 | ||
4014 | block-item-list: | |
4015 | block-item | |
4016 | block-item-list block-item | |
4017 | ||
4018 | block-item: | |
4019 | nested-declaration | |
4020 | statement | |
4021 | ||
4022 | nested-declaration: | |
4023 | declaration | |
4024 | ||
4025 | GNU extensions: | |
4026 | ||
4027 | compound-statement: | |
4028 | { label-declarations block-item-list } | |
4029 | ||
4030 | nested-declaration: | |
4031 | __extension__ nested-declaration | |
4032 | nested-function-definition | |
4033 | ||
4034 | label-declarations: | |
4035 | label-declaration | |
4036 | label-declarations label-declaration | |
4037 | ||
4038 | label-declaration: | |
4039 | __label__ identifier-list ; | |
4040 | ||
4041 | Allowing the mixing of declarations and code is new in C99. The | |
4042 | GNU syntax also permits (not shown above) labels at the end of | |
4043 | compound statements, which yield an error. We don't allow labels | |
4044 | on declarations; this might seem like a natural extension, but | |
4045 | there would be a conflict between attributes on the label and | |
4046 | prefix attributes on the declaration. ??? The syntax follows the | |
4047 | old parser in requiring something after label declarations. | |
4048 | Although they are erroneous if the labels declared aren't defined, | |
953ff289 | 4049 | is it useful for the syntax to be this way? |
b8698a0f | 4050 | |
953ff289 | 4051 | OpenMP: |
b8698a0f | 4052 | |
953ff289 DN |
4053 | block-item: |
4054 | openmp-directive | |
4055 | ||
4056 | openmp-directive: | |
4057 | barrier-directive | |
4058 | flush-directive */ | |
27bf414c JM |
4059 | |
4060 | static tree | |
4061 | c_parser_compound_statement (c_parser *parser) | |
4062 | { | |
4063 | tree stmt; | |
c2255bc4 AH |
4064 | location_t brace_loc; |
4065 | brace_loc = c_parser_peek_token (parser)->location; | |
27bf414c | 4066 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
5600f233 JM |
4067 | { |
4068 | /* Ensure a scope is entered and left anyway to avoid confusion | |
4069 | if we have just prepared to enter a function body. */ | |
4070 | stmt = c_begin_compound_stmt (true); | |
c2255bc4 | 4071 | c_end_compound_stmt (brace_loc, stmt, true); |
5600f233 JM |
4072 | return error_mark_node; |
4073 | } | |
27bf414c JM |
4074 | stmt = c_begin_compound_stmt (true); |
4075 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 4076 | return c_end_compound_stmt (brace_loc, stmt, true); |
27bf414c JM |
4077 | } |
4078 | ||
4079 | /* Parse a compound statement except for the opening brace. This is | |
4080 | used for parsing both compound statements and statement expressions | |
4081 | (which follow different paths to handling the opening). */ | |
4082 | ||
4083 | static void | |
4084 | c_parser_compound_statement_nostart (c_parser *parser) | |
4085 | { | |
4086 | bool last_stmt = false; | |
4087 | bool last_label = false; | |
6ec637a4 | 4088 | bool save_valid_for_pragma = valid_location_for_stdc_pragma_p (); |
3ba09659 | 4089 | location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
4090 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) |
4091 | { | |
4092 | c_parser_consume_token (parser); | |
4093 | return; | |
4094 | } | |
6ec637a4 | 4095 | mark_valid_location_for_stdc_pragma (true); |
27bf414c JM |
4096 | if (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
4097 | { | |
4098 | /* Read zero or more forward-declarations for labels that nested | |
4099 | functions can jump to. */ | |
6ec637a4 | 4100 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
4101 | while (c_parser_next_token_is_keyword (parser, RID_LABEL)) |
4102 | { | |
c2255bc4 | 4103 | label_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4104 | c_parser_consume_token (parser); |
4105 | /* Any identifiers, including those declared as type names, | |
4106 | are OK here. */ | |
4107 | while (true) | |
4108 | { | |
4109 | tree label; | |
4110 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
4111 | { | |
4112 | c_parser_error (parser, "expected identifier"); | |
4113 | break; | |
4114 | } | |
4115 | label | |
4116 | = declare_label (c_parser_peek_token (parser)->value); | |
4117 | C_DECLARED_LABEL_FLAG (label) = 1; | |
c2255bc4 | 4118 | add_stmt (build_stmt (label_loc, DECL_EXPR, label)); |
27bf414c JM |
4119 | c_parser_consume_token (parser); |
4120 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
4121 | c_parser_consume_token (parser); | |
4122 | else | |
4123 | break; | |
4124 | } | |
4125 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4126 | } | |
c1771a20 | 4127 | pedwarn (label_loc, OPT_Wpedantic, "ISO C forbids label declarations"); |
27bf414c JM |
4128 | } |
4129 | /* We must now have at least one statement, label or declaration. */ | |
4130 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
4131 | { | |
6ec637a4 | 4132 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
27bf414c JM |
4133 | c_parser_error (parser, "expected declaration or statement"); |
4134 | c_parser_consume_token (parser); | |
4135 | return; | |
4136 | } | |
4137 | while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE)) | |
4138 | { | |
4139 | location_t loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4140 | if (c_parser_next_token_is_keyword (parser, RID_CASE) |
4141 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4142 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4143 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4144 | { | |
c7412148 TT |
4145 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) |
4146 | label_loc = c_parser_peek_2nd_token (parser)->location; | |
4147 | else | |
4148 | label_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
4149 | last_label = true; |
4150 | last_stmt = false; | |
6ec637a4 | 4151 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
4152 | c_parser_label (parser); |
4153 | } | |
4154 | else if (!last_label | |
2f413185 | 4155 | && c_parser_next_tokens_start_declaration (parser)) |
27bf414c JM |
4156 | { |
4157 | last_label = false; | |
6ec637a4 | 4158 | mark_valid_location_for_stdc_pragma (false); |
f05b9d93 | 4159 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL); |
fcf73884 | 4160 | if (last_stmt) |
b8698a0f | 4161 | pedwarn_c90 (loc, |
509c9d60 | 4162 | (pedantic && !flag_isoc99) |
c1771a20 | 4163 | ? OPT_Wpedantic |
fcf73884 | 4164 | : OPT_Wdeclaration_after_statement, |
509c9d60 | 4165 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
4166 | last_stmt = false; |
4167 | } | |
4168 | else if (!last_label | |
4169 | && c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4170 | { | |
4171 | /* __extension__ can start a declaration, but is also an | |
4172 | unary operator that can start an expression. Consume all | |
4173 | but the last of a possible series of __extension__ to | |
4174 | determine which. */ | |
4175 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4176 | && (c_parser_peek_2nd_token (parser)->keyword | |
4177 | == RID_EXTENSION)) | |
4178 | c_parser_consume_token (parser); | |
32912286 | 4179 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
27bf414c JM |
4180 | { |
4181 | int ext; | |
4182 | ext = disable_extension_diagnostics (); | |
4183 | c_parser_consume_token (parser); | |
4184 | last_label = false; | |
6ec637a4 | 4185 | mark_valid_location_for_stdc_pragma (false); |
32912286 | 4186 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
f05b9d93 | 4187 | true, NULL); |
27bf414c JM |
4188 | /* Following the old parser, __extension__ does not |
4189 | disable this diagnostic. */ | |
4190 | restore_extension_diagnostics (ext); | |
fcf73884 | 4191 | if (last_stmt) |
509c9d60 | 4192 | pedwarn_c90 (loc, (pedantic && !flag_isoc99) |
c1771a20 | 4193 | ? OPT_Wpedantic |
fcf73884 | 4194 | : OPT_Wdeclaration_after_statement, |
509c9d60 | 4195 | "ISO C90 forbids mixed declarations and code"); |
27bf414c JM |
4196 | last_stmt = false; |
4197 | } | |
4198 | else | |
4199 | goto statement; | |
4200 | } | |
bc4071dd RH |
4201 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
4202 | { | |
4203 | /* External pragmas, and some omp pragmas, are not associated | |
4204 | with regular c code, and so are not to be considered statements | |
4205 | syntactically. This ensures that the user doesn't put them | |
4206 | places that would turn into syntax errors if the directive | |
4207 | were ignored. */ | |
4208 | if (c_parser_pragma (parser, pragma_compound)) | |
4209 | last_label = false, last_stmt = true; | |
4210 | } | |
4211 | else if (c_parser_next_token_is (parser, CPP_EOF)) | |
4212 | { | |
6ec637a4 | 4213 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
bc4071dd RH |
4214 | c_parser_error (parser, "expected declaration or statement"); |
4215 | return; | |
4216 | } | |
b4b56033 MLI |
4217 | else if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4218 | { | |
b8698a0f | 4219 | if (parser->in_if_block) |
b4b56033 | 4220 | { |
6ec637a4 | 4221 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); |
3ba09659 | 4222 | error_at (loc, """expected %<}%> before %<else%>"); |
b4b56033 MLI |
4223 | return; |
4224 | } | |
b8698a0f | 4225 | else |
b4b56033 | 4226 | { |
3ba09659 | 4227 | error_at (loc, "%<else%> without a previous %<if%>"); |
b4b56033 MLI |
4228 | c_parser_consume_token (parser); |
4229 | continue; | |
4230 | } | |
4231 | } | |
27bf414c JM |
4232 | else |
4233 | { | |
4234 | statement: | |
4235 | last_label = false; | |
4236 | last_stmt = true; | |
6ec637a4 | 4237 | mark_valid_location_for_stdc_pragma (false); |
27bf414c JM |
4238 | c_parser_statement_after_labels (parser); |
4239 | } | |
2c14ae9a VR |
4240 | |
4241 | parser->error = false; | |
27bf414c JM |
4242 | } |
4243 | if (last_label) | |
3ba09659 | 4244 | error_at (label_loc, "label at end of compound statement"); |
27bf414c | 4245 | c_parser_consume_token (parser); |
6ec637a4 JJ |
4246 | /* Restore the value we started with. */ |
4247 | mark_valid_location_for_stdc_pragma (save_valid_for_pragma); | |
27bf414c JM |
4248 | } |
4249 | ||
4250 | /* Parse a label (C90 6.6.1, C99 6.8.1). | |
4251 | ||
4252 | label: | |
4253 | identifier : attributes[opt] | |
4254 | case constant-expression : | |
4255 | default : | |
4256 | ||
4257 | GNU extensions: | |
4258 | ||
4259 | label: | |
4260 | case constant-expression ... constant-expression : | |
4261 | ||
4262 | The use of attributes on labels is a GNU extension. The syntax in | |
4263 | GNU C accepts any expressions without commas, non-constant | |
4264 | expressions being rejected later. */ | |
4265 | ||
4266 | static void | |
4267 | c_parser_label (c_parser *parser) | |
4268 | { | |
4269 | location_t loc1 = c_parser_peek_token (parser)->location; | |
4270 | tree label = NULL_TREE; | |
4271 | if (c_parser_next_token_is_keyword (parser, RID_CASE)) | |
4272 | { | |
4273 | tree exp1, exp2; | |
4274 | c_parser_consume_token (parser); | |
4275 | exp1 = c_parser_expr_no_commas (parser, NULL).value; | |
4276 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
4277 | { | |
4278 | c_parser_consume_token (parser); | |
c2255bc4 | 4279 | label = do_case (loc1, exp1, NULL_TREE); |
27bf414c JM |
4280 | } |
4281 | else if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
4282 | { | |
4283 | c_parser_consume_token (parser); | |
4284 | exp2 = c_parser_expr_no_commas (parser, NULL).value; | |
4285 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 4286 | label = do_case (loc1, exp1, exp2); |
27bf414c JM |
4287 | } |
4288 | else | |
4289 | c_parser_error (parser, "expected %<:%> or %<...%>"); | |
4290 | } | |
4291 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
4292 | { | |
4293 | c_parser_consume_token (parser); | |
4294 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
c2255bc4 | 4295 | label = do_case (loc1, NULL_TREE, NULL_TREE); |
27bf414c JM |
4296 | } |
4297 | else | |
4298 | { | |
4299 | tree name = c_parser_peek_token (parser)->value; | |
4300 | tree tlab; | |
27bf414c | 4301 | tree attrs; |
c7412148 | 4302 | location_t loc2 = c_parser_peek_token (parser)->location; |
27bf414c JM |
4303 | gcc_assert (c_parser_next_token_is (parser, CPP_NAME)); |
4304 | c_parser_consume_token (parser); | |
4305 | gcc_assert (c_parser_next_token_is (parser, CPP_COLON)); | |
27bf414c JM |
4306 | c_parser_consume_token (parser); |
4307 | attrs = c_parser_attributes (parser); | |
4308 | tlab = define_label (loc2, name); | |
4309 | if (tlab) | |
4310 | { | |
4311 | decl_attributes (&tlab, attrs, 0); | |
c2255bc4 | 4312 | label = add_stmt (build_stmt (loc1, LABEL_EXPR, tlab)); |
27bf414c JM |
4313 | } |
4314 | } | |
4315 | if (label) | |
3d57f0f0 | 4316 | { |
2f413185 | 4317 | if (c_parser_next_tokens_start_declaration (parser)) |
3d57f0f0 | 4318 | { |
3ba09659 AH |
4319 | error_at (c_parser_peek_token (parser)->location, |
4320 | "a label can only be part of a statement and " | |
4321 | "a declaration is not a statement"); | |
b8698a0f | 4322 | c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false, |
32912286 | 4323 | /*static_assert_ok*/ true, |
6265d07c | 4324 | /*empty_ok*/ true, /*nested*/ true, |
f05b9d93 | 4325 | /*start_attr_ok*/ true, NULL); |
3d57f0f0 MLI |
4326 | } |
4327 | } | |
27bf414c JM |
4328 | } |
4329 | ||
4330 | /* Parse a statement (C90 6.6, C99 6.8). | |
4331 | ||
4332 | statement: | |
4333 | labeled-statement | |
4334 | compound-statement | |
4335 | expression-statement | |
4336 | selection-statement | |
4337 | iteration-statement | |
4338 | jump-statement | |
4339 | ||
4340 | labeled-statement: | |
4341 | label statement | |
4342 | ||
4343 | expression-statement: | |
4344 | expression[opt] ; | |
4345 | ||
4346 | selection-statement: | |
4347 | if-statement | |
4348 | switch-statement | |
4349 | ||
4350 | iteration-statement: | |
4351 | while-statement | |
4352 | do-statement | |
4353 | for-statement | |
4354 | ||
4355 | jump-statement: | |
4356 | goto identifier ; | |
4357 | continue ; | |
4358 | break ; | |
4359 | return expression[opt] ; | |
4360 | ||
4361 | GNU extensions: | |
4362 | ||
4363 | statement: | |
4364 | asm-statement | |
4365 | ||
4366 | jump-statement: | |
4367 | goto * expression ; | |
4368 | ||
4369 | Objective-C: | |
4370 | ||
4371 | statement: | |
4372 | objc-throw-statement | |
4373 | objc-try-catch-statement | |
4374 | objc-synchronized-statement | |
4375 | ||
4376 | objc-throw-statement: | |
4377 | @throw expression ; | |
4378 | @throw ; | |
953ff289 DN |
4379 | |
4380 | OpenMP: | |
4381 | ||
4382 | statement: | |
4383 | openmp-construct | |
4384 | ||
4385 | openmp-construct: | |
4386 | parallel-construct | |
4387 | for-construct | |
4388 | sections-construct | |
4389 | single-construct | |
4390 | parallel-for-construct | |
4391 | parallel-sections-construct | |
4392 | master-construct | |
4393 | critical-construct | |
4394 | atomic-construct | |
4395 | ordered-construct | |
4396 | ||
4397 | parallel-construct: | |
4398 | parallel-directive structured-block | |
4399 | ||
4400 | for-construct: | |
4401 | for-directive iteration-statement | |
4402 | ||
4403 | sections-construct: | |
4404 | sections-directive section-scope | |
4405 | ||
4406 | single-construct: | |
4407 | single-directive structured-block | |
4408 | ||
4409 | parallel-for-construct: | |
4410 | parallel-for-directive iteration-statement | |
4411 | ||
4412 | parallel-sections-construct: | |
4413 | parallel-sections-directive section-scope | |
4414 | ||
4415 | master-construct: | |
4416 | master-directive structured-block | |
4417 | ||
4418 | critical-construct: | |
4419 | critical-directive structured-block | |
4420 | ||
4421 | atomic-construct: | |
4422 | atomic-directive expression-statement | |
4423 | ||
4424 | ordered-construct: | |
0a35513e AH |
4425 | ordered-directive structured-block |
4426 | ||
4427 | Transactional Memory: | |
4428 | ||
4429 | statement: | |
4430 | transaction-statement | |
4431 | transaction-cancel-statement | |
4432 | */ | |
27bf414c JM |
4433 | |
4434 | static void | |
4435 | c_parser_statement (c_parser *parser) | |
4436 | { | |
4437 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
4438 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4439 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4440 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4441 | c_parser_label (parser); | |
4442 | c_parser_statement_after_labels (parser); | |
4443 | } | |
4444 | ||
4445 | /* Parse a statement, other than a labeled statement. */ | |
4446 | ||
4447 | static void | |
4448 | c_parser_statement_after_labels (c_parser *parser) | |
4449 | { | |
4450 | location_t loc = c_parser_peek_token (parser)->location; | |
4451 | tree stmt = NULL_TREE; | |
b4b56033 MLI |
4452 | bool in_if_block = parser->in_if_block; |
4453 | parser->in_if_block = false; | |
27bf414c JM |
4454 | switch (c_parser_peek_token (parser)->type) |
4455 | { | |
4456 | case CPP_OPEN_BRACE: | |
4457 | add_stmt (c_parser_compound_statement (parser)); | |
4458 | break; | |
4459 | case CPP_KEYWORD: | |
4460 | switch (c_parser_peek_token (parser)->keyword) | |
4461 | { | |
4462 | case RID_IF: | |
4463 | c_parser_if_statement (parser); | |
4464 | break; | |
4465 | case RID_SWITCH: | |
4466 | c_parser_switch_statement (parser); | |
4467 | break; | |
4468 | case RID_WHILE: | |
4469 | c_parser_while_statement (parser); | |
4470 | break; | |
4471 | case RID_DO: | |
4472 | c_parser_do_statement (parser); | |
4473 | break; | |
4474 | case RID_FOR: | |
4475 | c_parser_for_statement (parser); | |
4476 | break; | |
4477 | case RID_GOTO: | |
4478 | c_parser_consume_token (parser); | |
4479 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
4480 | { | |
c2255bc4 AH |
4481 | stmt = c_finish_goto_label (loc, |
4482 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
4483 | c_parser_consume_token (parser); |
4484 | } | |
4485 | else if (c_parser_next_token_is (parser, CPP_MULT)) | |
4486 | { | |
84628aa8 JJ |
4487 | tree val; |
4488 | ||
27bf414c | 4489 | c_parser_consume_token (parser); |
84628aa8 JJ |
4490 | val = c_parser_expression (parser).value; |
4491 | mark_exp_read (val); | |
4492 | stmt = c_finish_goto_ptr (loc, val); | |
27bf414c JM |
4493 | } |
4494 | else | |
4495 | c_parser_error (parser, "expected identifier or %<*%>"); | |
4496 | goto expect_semicolon; | |
4497 | case RID_CONTINUE: | |
4498 | c_parser_consume_token (parser); | |
c2255bc4 | 4499 | stmt = c_finish_bc_stmt (loc, &c_cont_label, false); |
27bf414c JM |
4500 | goto expect_semicolon; |
4501 | case RID_BREAK: | |
4502 | c_parser_consume_token (parser); | |
c2255bc4 | 4503 | stmt = c_finish_bc_stmt (loc, &c_break_label, true); |
27bf414c JM |
4504 | goto expect_semicolon; |
4505 | case RID_RETURN: | |
4506 | c_parser_consume_token (parser); | |
4507 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4508 | { | |
c2255bc4 | 4509 | stmt = c_finish_return (loc, NULL_TREE, NULL_TREE); |
27bf414c JM |
4510 | c_parser_consume_token (parser); |
4511 | } | |
4512 | else | |
4513 | { | |
bbbbb16a | 4514 | struct c_expr expr = c_parser_expression_conv (parser); |
ebfbbdc5 | 4515 | mark_exp_read (expr.value); |
c2255bc4 | 4516 | stmt = c_finish_return (loc, expr.value, expr.original_type); |
27bf414c JM |
4517 | goto expect_semicolon; |
4518 | } | |
4519 | break; | |
4520 | case RID_ASM: | |
4521 | stmt = c_parser_asm_statement (parser); | |
4522 | break; | |
0a35513e AH |
4523 | case RID_TRANSACTION_ATOMIC: |
4524 | case RID_TRANSACTION_RELAXED: | |
4525 | stmt = c_parser_transaction (parser, | |
4526 | c_parser_peek_token (parser)->keyword); | |
4527 | break; | |
4528 | case RID_TRANSACTION_CANCEL: | |
4529 | stmt = c_parser_transaction_cancel (parser); | |
4530 | goto expect_semicolon; | |
49b91f05 | 4531 | case RID_AT_THROW: |
27bf414c JM |
4532 | gcc_assert (c_dialect_objc ()); |
4533 | c_parser_consume_token (parser); | |
4534 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4535 | { | |
c2255bc4 | 4536 | stmt = objc_build_throw_stmt (loc, NULL_TREE); |
27bf414c JM |
4537 | c_parser_consume_token (parser); |
4538 | } | |
4539 | else | |
4540 | { | |
928c19bb JM |
4541 | tree expr = c_parser_expression (parser).value; |
4542 | expr = c_fully_fold (expr, false, NULL); | |
c2255bc4 | 4543 | stmt = objc_build_throw_stmt (loc, expr); |
27bf414c JM |
4544 | goto expect_semicolon; |
4545 | } | |
4546 | break; | |
49b91f05 | 4547 | case RID_AT_TRY: |
27bf414c | 4548 | gcc_assert (c_dialect_objc ()); |
437c2322 | 4549 | c_parser_objc_try_catch_finally_statement (parser); |
27bf414c JM |
4550 | break; |
4551 | case RID_AT_SYNCHRONIZED: | |
4552 | gcc_assert (c_dialect_objc ()); | |
4553 | c_parser_objc_synchronized_statement (parser); | |
4554 | break; | |
4555 | default: | |
4556 | goto expr_stmt; | |
4557 | } | |
4558 | break; | |
4559 | case CPP_SEMICOLON: | |
4560 | c_parser_consume_token (parser); | |
4561 | break; | |
4562 | case CPP_CLOSE_PAREN: | |
4563 | case CPP_CLOSE_SQUARE: | |
4564 | /* Avoid infinite loop in error recovery: | |
4565 | c_parser_skip_until_found stops at a closing nesting | |
4566 | delimiter without consuming it, but here we need to consume | |
4567 | it to proceed further. */ | |
4568 | c_parser_error (parser, "expected statement"); | |
4569 | c_parser_consume_token (parser); | |
4570 | break; | |
bc4071dd RH |
4571 | case CPP_PRAGMA: |
4572 | c_parser_pragma (parser, pragma_stmt); | |
4573 | break; | |
27bf414c JM |
4574 | default: |
4575 | expr_stmt: | |
c2255bc4 | 4576 | stmt = c_finish_expr_stmt (loc, c_parser_expression_conv (parser).value); |
27bf414c JM |
4577 | expect_semicolon: |
4578 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4579 | break; | |
4580 | } | |
4581 | /* Two cases cannot and do not have line numbers associated: If stmt | |
4582 | is degenerate, such as "2;", then stmt is an INTEGER_CST, which | |
4583 | cannot hold line numbers. But that's OK because the statement | |
4584 | will either be changed to a MODIFY_EXPR during gimplification of | |
4585 | the statement expr, or discarded. If stmt was compound, but | |
4586 | without new variables, we will have skipped the creation of a | |
4587 | BIND and will have a bare STATEMENT_LIST. But that's OK because | |
4588 | (recursively) all of the component statements should already have | |
4589 | line numbers assigned. ??? Can we discard no-op statements | |
4590 | earlier? */ | |
c2255bc4 AH |
4591 | if (CAN_HAVE_LOCATION_P (stmt) |
4592 | && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION) | |
4593 | SET_EXPR_LOCATION (stmt, loc); | |
b4b56033 MLI |
4594 | |
4595 | parser->in_if_block = in_if_block; | |
27bf414c JM |
4596 | } |
4597 | ||
ca085fd7 MLI |
4598 | /* Parse the condition from an if, do, while or for statements. */ |
4599 | ||
4600 | static tree | |
4601 | c_parser_condition (c_parser *parser) | |
4602 | { | |
c2255bc4 | 4603 | location_t loc = c_parser_peek_token (parser)->location; |
ca085fd7 | 4604 | tree cond; |
928c19bb JM |
4605 | cond = c_parser_expression_conv (parser).value; |
4606 | cond = c_objc_common_truthvalue_conversion (loc, cond); | |
4607 | cond = c_fully_fold (cond, false, NULL); | |
ca085fd7 MLI |
4608 | if (warn_sequence_point) |
4609 | verify_sequence_points (cond); | |
4610 | return cond; | |
4611 | } | |
4612 | ||
27bf414c JM |
4613 | /* Parse a parenthesized condition from an if, do or while statement. |
4614 | ||
4615 | condition: | |
4616 | ( expression ) | |
4617 | */ | |
4618 | static tree | |
4619 | c_parser_paren_condition (c_parser *parser) | |
4620 | { | |
27bf414c JM |
4621 | tree cond; |
4622 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4623 | return error_mark_node; | |
ca085fd7 | 4624 | cond = c_parser_condition (parser); |
27bf414c JM |
4625 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
4626 | return cond; | |
4627 | } | |
4628 | ||
4629 | /* Parse a statement which is a block in C99. */ | |
4630 | ||
4631 | static tree | |
4632 | c_parser_c99_block_statement (c_parser *parser) | |
4633 | { | |
4634 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 4635 | location_t loc = c_parser_peek_token (parser)->location; |
27bf414c | 4636 | c_parser_statement (parser); |
c2255bc4 | 4637 | return c_end_compound_stmt (loc, block, flag_isoc99); |
27bf414c JM |
4638 | } |
4639 | ||
b4b56033 MLI |
4640 | /* Parse the body of an if statement. This is just parsing a |
4641 | statement but (a) it is a block in C99, (b) we track whether the | |
4642 | body is an if statement for the sake of -Wparentheses warnings, (c) | |
4643 | we handle an empty body specially for the sake of -Wempty-body | |
4644 | warnings, and (d) we call parser_compound_statement directly | |
4645 | because c_parser_statement_after_labels resets | |
4646 | parser->in_if_block. */ | |
27bf414c JM |
4647 | |
4648 | static tree | |
4649 | c_parser_if_body (c_parser *parser, bool *if_p) | |
4650 | { | |
4651 | tree block = c_begin_compound_stmt (flag_isoc99); | |
c2255bc4 | 4652 | location_t body_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4653 | while (c_parser_next_token_is_keyword (parser, RID_CASE) |
4654 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4655 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4656 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4657 | c_parser_label (parser); | |
4658 | *if_p = c_parser_next_token_is_keyword (parser, RID_IF); | |
62e00e94 | 4659 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
b4b56033 | 4660 | { |
626c34b5 | 4661 | location_t loc = c_parser_peek_token (parser)->location; |
c2255bc4 | 4662 | add_stmt (build_empty_stmt (loc)); |
b4b56033 | 4663 | c_parser_consume_token (parser); |
626c34b5 PB |
4664 | if (!c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4665 | warning_at (loc, OPT_Wempty_body, | |
4666 | "suggest braces around empty body in an %<if%> statement"); | |
b4b56033 MLI |
4667 | } |
4668 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
4669 | add_stmt (c_parser_compound_statement (parser)); | |
4670 | else | |
4671 | c_parser_statement_after_labels (parser); | |
c2255bc4 | 4672 | return c_end_compound_stmt (body_loc, block, flag_isoc99); |
b4b56033 MLI |
4673 | } |
4674 | ||
4675 | /* Parse the else body of an if statement. This is just parsing a | |
4676 | statement but (a) it is a block in C99, (b) we handle an empty body | |
4677 | specially for the sake of -Wempty-body warnings. */ | |
4678 | ||
4679 | static tree | |
4680 | c_parser_else_body (c_parser *parser) | |
4681 | { | |
c2255bc4 | 4682 | location_t else_loc = c_parser_peek_token (parser)->location; |
b4b56033 MLI |
4683 | tree block = c_begin_compound_stmt (flag_isoc99); |
4684 | while (c_parser_next_token_is_keyword (parser, RID_CASE) | |
4685 | || c_parser_next_token_is_keyword (parser, RID_DEFAULT) | |
4686 | || (c_parser_next_token_is (parser, CPP_NAME) | |
4687 | && c_parser_peek_2nd_token (parser)->type == CPP_COLON)) | |
4688 | c_parser_label (parser); | |
4689 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
4690 | { | |
c2255bc4 AH |
4691 | location_t loc = c_parser_peek_token (parser)->location; |
4692 | warning_at (loc, | |
626c34b5 PB |
4693 | OPT_Wempty_body, |
4694 | "suggest braces around empty body in an %<else%> statement"); | |
c2255bc4 | 4695 | add_stmt (build_empty_stmt (loc)); |
b4b56033 MLI |
4696 | c_parser_consume_token (parser); |
4697 | } | |
b8698a0f | 4698 | else |
b4b56033 | 4699 | c_parser_statement_after_labels (parser); |
c2255bc4 | 4700 | return c_end_compound_stmt (else_loc, block, flag_isoc99); |
27bf414c JM |
4701 | } |
4702 | ||
4703 | /* Parse an if statement (C90 6.6.4, C99 6.8.4). | |
4704 | ||
4705 | if-statement: | |
4706 | if ( expression ) statement | |
4707 | if ( expression ) statement else statement | |
4708 | */ | |
4709 | ||
4710 | static void | |
4711 | c_parser_if_statement (c_parser *parser) | |
4712 | { | |
4713 | tree block; | |
4714 | location_t loc; | |
4715 | tree cond; | |
b4b56033 | 4716 | bool first_if = false; |
27bf414c | 4717 | tree first_body, second_body; |
b4b56033 MLI |
4718 | bool in_if_block; |
4719 | ||
27bf414c JM |
4720 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF)); |
4721 | c_parser_consume_token (parser); | |
4722 | block = c_begin_compound_stmt (flag_isoc99); | |
4723 | loc = c_parser_peek_token (parser)->location; | |
4724 | cond = c_parser_paren_condition (parser); | |
b4b56033 MLI |
4725 | in_if_block = parser->in_if_block; |
4726 | parser->in_if_block = true; | |
27bf414c | 4727 | first_body = c_parser_if_body (parser, &first_if); |
b4b56033 | 4728 | parser->in_if_block = in_if_block; |
27bf414c JM |
4729 | if (c_parser_next_token_is_keyword (parser, RID_ELSE)) |
4730 | { | |
4731 | c_parser_consume_token (parser); | |
b4b56033 | 4732 | second_body = c_parser_else_body (parser); |
27bf414c JM |
4733 | } |
4734 | else | |
4735 | second_body = NULL_TREE; | |
4736 | c_finish_if_stmt (loc, cond, first_body, second_body, first_if); | |
c2255bc4 | 4737 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4738 | } |
4739 | ||
4740 | /* Parse a switch statement (C90 6.6.4, C99 6.8.4). | |
4741 | ||
4742 | switch-statement: | |
4743 | switch (expression) statement | |
4744 | */ | |
4745 | ||
4746 | static void | |
4747 | c_parser_switch_statement (c_parser *parser) | |
4748 | { | |
4749 | tree block, expr, body, save_break; | |
c2255bc4 AH |
4750 | location_t switch_loc = c_parser_peek_token (parser)->location; |
4751 | location_t switch_cond_loc; | |
27bf414c JM |
4752 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH)); |
4753 | c_parser_consume_token (parser); | |
4754 | block = c_begin_compound_stmt (flag_isoc99); | |
4755 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
4756 | { | |
c2255bc4 | 4757 | switch_cond_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
4758 | expr = c_parser_expression (parser).value; |
4759 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
4760 | } | |
4761 | else | |
c2255bc4 AH |
4762 | { |
4763 | switch_cond_loc = UNKNOWN_LOCATION; | |
4764 | expr = error_mark_node; | |
4765 | } | |
4766 | c_start_case (switch_loc, switch_cond_loc, expr); | |
27bf414c JM |
4767 | save_break = c_break_label; |
4768 | c_break_label = NULL_TREE; | |
4769 | body = c_parser_c99_block_statement (parser); | |
4770 | c_finish_case (body); | |
4771 | if (c_break_label) | |
c2255bc4 AH |
4772 | { |
4773 | location_t here = c_parser_peek_token (parser)->location; | |
4774 | tree t = build1 (LABEL_EXPR, void_type_node, c_break_label); | |
4775 | SET_EXPR_LOCATION (t, here); | |
4776 | add_stmt (t); | |
4777 | } | |
27bf414c | 4778 | c_break_label = save_break; |
c2255bc4 | 4779 | add_stmt (c_end_compound_stmt (switch_loc, block, flag_isoc99)); |
27bf414c JM |
4780 | } |
4781 | ||
4782 | /* Parse a while statement (C90 6.6.5, C99 6.8.5). | |
4783 | ||
4784 | while-statement: | |
4785 | while (expression) statement | |
4786 | */ | |
4787 | ||
4788 | static void | |
4789 | c_parser_while_statement (c_parser *parser) | |
4790 | { | |
4791 | tree block, cond, body, save_break, save_cont; | |
4792 | location_t loc; | |
4793 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE)); | |
4794 | c_parser_consume_token (parser); | |
4795 | block = c_begin_compound_stmt (flag_isoc99); | |
4796 | loc = c_parser_peek_token (parser)->location; | |
4797 | cond = c_parser_paren_condition (parser); | |
4798 | save_break = c_break_label; | |
4799 | c_break_label = NULL_TREE; | |
4800 | save_cont = c_cont_label; | |
4801 | c_cont_label = NULL_TREE; | |
4802 | body = c_parser_c99_block_statement (parser); | |
4803 | c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true); | |
c2255bc4 | 4804 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4805 | c_break_label = save_break; |
4806 | c_cont_label = save_cont; | |
4807 | } | |
4808 | ||
4809 | /* Parse a do statement (C90 6.6.5, C99 6.8.5). | |
4810 | ||
4811 | do-statement: | |
4812 | do statement while ( expression ) ; | |
4813 | */ | |
4814 | ||
4815 | static void | |
4816 | c_parser_do_statement (c_parser *parser) | |
4817 | { | |
4818 | tree block, cond, body, save_break, save_cont, new_break, new_cont; | |
4819 | location_t loc; | |
4820 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO)); | |
4821 | c_parser_consume_token (parser); | |
62e00e94 | 4822 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
3ba09659 AH |
4823 | warning_at (c_parser_peek_token (parser)->location, |
4824 | OPT_Wempty_body, | |
4825 | "suggest braces around empty body in %<do%> statement"); | |
27bf414c JM |
4826 | block = c_begin_compound_stmt (flag_isoc99); |
4827 | loc = c_parser_peek_token (parser)->location; | |
4828 | save_break = c_break_label; | |
4829 | c_break_label = NULL_TREE; | |
4830 | save_cont = c_cont_label; | |
4831 | c_cont_label = NULL_TREE; | |
4832 | body = c_parser_c99_block_statement (parser); | |
4833 | c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>"); | |
4834 | new_break = c_break_label; | |
4835 | c_break_label = save_break; | |
4836 | new_cont = c_cont_label; | |
4837 | c_cont_label = save_cont; | |
4838 | cond = c_parser_paren_condition (parser); | |
4839 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
4840 | c_parser_skip_to_end_of_block_or_statement (parser); | |
4841 | c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false); | |
c2255bc4 | 4842 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99)); |
27bf414c JM |
4843 | } |
4844 | ||
4845 | /* Parse a for statement (C90 6.6.5, C99 6.8.5). | |
4846 | ||
4847 | for-statement: | |
4848 | for ( expression[opt] ; expression[opt] ; expression[opt] ) statement | |
4849 | for ( nested-declaration expression[opt] ; expression[opt] ) statement | |
4850 | ||
4851 | The form with a declaration is new in C99. | |
4852 | ||
4853 | ??? In accordance with the old parser, the declaration may be a | |
4854 | nested function, which is then rejected in check_for_loop_decls, | |
4855 | but does it make any sense for this to be included in the grammar? | |
4856 | Note in particular that the nested function does not include a | |
4857 | trailing ';', whereas the "declaration" production includes one. | |
4858 | Also, can we reject bad declarations earlier and cheaper than | |
f05b9d93 NP |
4859 | check_for_loop_decls? |
4860 | ||
4861 | In Objective-C, there are two additional variants: | |
4862 | ||
4863 | foreach-statement: | |
4864 | for ( expression in expresssion ) statement | |
4865 | for ( declaration in expression ) statement | |
4866 | ||
4867 | This is inconsistent with C, because the second variant is allowed | |
4868 | even if c99 is not enabled. | |
4869 | ||
4870 | The rest of the comment documents these Objective-C foreach-statement. | |
4871 | ||
4872 | Here is the canonical example of the first variant: | |
4873 | for (object in array) { do something with object } | |
4874 | we call the first expression ("object") the "object_expression" and | |
4875 | the second expression ("array") the "collection_expression". | |
4876 | object_expression must be an lvalue of type "id" (a generic Objective-C | |
4877 | object) because the loop works by assigning to object_expression the | |
4878 | various objects from the collection_expression. collection_expression | |
4879 | must evaluate to something of type "id" which responds to the method | |
4880 | countByEnumeratingWithState:objects:count:. | |
4881 | ||
4882 | The canonical example of the second variant is: | |
4883 | for (id object in array) { do something with object } | |
4884 | which is completely equivalent to | |
4885 | { | |
4886 | id object; | |
4887 | for (object in array) { do something with object } | |
4888 | } | |
4889 | Note that initizializing 'object' in some way (eg, "for ((object = | |
4890 | xxx) in array) { do something with object }") is possibly | |
4891 | technically valid, but completely pointless as 'object' will be | |
4892 | assigned to something else as soon as the loop starts. We should | |
4893 | most likely reject it (TODO). | |
4894 | ||
4895 | The beginning of the Objective-C foreach-statement looks exactly | |
4896 | like the beginning of the for-statement, and we can tell it is a | |
4897 | foreach-statement only because the initial declaration or | |
4898 | expression is terminated by 'in' instead of ';'. | |
4899 | */ | |
27bf414c JM |
4900 | |
4901 | static void | |
4902 | c_parser_for_statement (c_parser *parser) | |
4903 | { | |
4904 | tree block, cond, incr, save_break, save_cont, body; | |
f05b9d93 | 4905 | /* The following are only used when parsing an ObjC foreach statement. */ |
689f2c82 AO |
4906 | tree object_expression; |
4907 | /* Silence the bogus uninitialized warning. */ | |
4908 | tree collection_expression = NULL; | |
c2255bc4 AH |
4909 | location_t loc = c_parser_peek_token (parser)->location; |
4910 | location_t for_loc = c_parser_peek_token (parser)->location; | |
f05b9d93 | 4911 | bool is_foreach_statement = false; |
27bf414c JM |
4912 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR)); |
4913 | c_parser_consume_token (parser); | |
f05b9d93 NP |
4914 | /* Open a compound statement in Objective-C as well, just in case this is |
4915 | as foreach expression. */ | |
4916 | block = c_begin_compound_stmt (flag_isoc99 || c_dialect_objc ()); | |
91b90ead UB |
4917 | cond = error_mark_node; |
4918 | incr = error_mark_node; | |
27bf414c JM |
4919 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
4920 | { | |
4921 | /* Parse the initialization declaration or expression. */ | |
f05b9d93 | 4922 | object_expression = error_mark_node; |
a5812bdc | 4923 | parser->objc_could_be_foreach_context = c_dialect_objc (); |
27bf414c JM |
4924 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
4925 | { | |
a5812bdc | 4926 | parser->objc_could_be_foreach_context = false; |
27bf414c | 4927 | c_parser_consume_token (parser); |
c2255bc4 | 4928 | c_finish_expr_stmt (loc, NULL_TREE); |
27bf414c | 4929 | } |
2f413185 | 4930 | else if (c_parser_next_tokens_start_declaration (parser)) |
27bf414c | 4931 | { |
f05b9d93 NP |
4932 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, |
4933 | &object_expression); | |
4934 | parser->objc_could_be_foreach_context = false; | |
4935 | ||
4936 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
4937 | { | |
4938 | c_parser_consume_token (parser); | |
4939 | is_foreach_statement = true; | |
4940 | if (check_for_loop_decls (for_loc, true) == NULL_TREE) | |
4941 | c_parser_error (parser, "multiple iterating variables in fast enumeration"); | |
4942 | } | |
4943 | else | |
4944 | check_for_loop_decls (for_loc, flag_isoc99); | |
27bf414c JM |
4945 | } |
4946 | else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION)) | |
4947 | { | |
4948 | /* __extension__ can start a declaration, but is also an | |
4949 | unary operator that can start an expression. Consume all | |
4950 | but the last of a possible series of __extension__ to | |
4951 | determine which. */ | |
4952 | while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD | |
4953 | && (c_parser_peek_2nd_token (parser)->keyword | |
4954 | == RID_EXTENSION)) | |
4955 | c_parser_consume_token (parser); | |
32912286 | 4956 | if (c_token_starts_declaration (c_parser_peek_2nd_token (parser))) |
27bf414c JM |
4957 | { |
4958 | int ext; | |
4959 | ext = disable_extension_diagnostics (); | |
4960 | c_parser_consume_token (parser); | |
32912286 | 4961 | c_parser_declaration_or_fndef (parser, true, true, true, true, |
f05b9d93 NP |
4962 | true, &object_expression); |
4963 | parser->objc_could_be_foreach_context = false; | |
4964 | ||
27bf414c | 4965 | restore_extension_diagnostics (ext); |
f05b9d93 NP |
4966 | if (c_parser_next_token_is_keyword (parser, RID_IN)) |
4967 | { | |
4968 | c_parser_consume_token (parser); | |
4969 | is_foreach_statement = true; | |
4970 | if (check_for_loop_decls (for_loc, true) == NULL_TREE) | |
4971 | c_parser_error (parser, "multiple iterating variables in fast enumeration"); | |
4972 | } | |
4973 | else | |
4974 | check_for_loop_decls (for_loc, flag_isoc99); | |
27bf414c JM |
4975 | } |
4976 | else | |
4977 | goto init_expr; | |
4978 | } | |
4979 | else | |
4980 | { | |
4981 | init_expr: | |
f05b9d93 NP |
4982 | { |
4983 | tree init_expression; | |
f05b9d93 NP |
4984 | init_expression = c_parser_expression (parser).value; |
4985 | parser->objc_could_be_foreach_context = false; | |
4986 | if (c_parser_next_token_is_keyword (parser, RID_IN)) | |
4987 | { | |
4988 | c_parser_consume_token (parser); | |
4989 | is_foreach_statement = true; | |
4990 | if (! lvalue_p (init_expression)) | |
4991 | c_parser_error (parser, "invalid iterating variable in fast enumeration"); | |
69a97201 | 4992 | object_expression = c_fully_fold (init_expression, false, NULL); |
f05b9d93 NP |
4993 | } |
4994 | else | |
4995 | { | |
4996 | c_finish_expr_stmt (loc, init_expression); | |
4997 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
4998 | } | |
4999 | } | |
27bf414c | 5000 | } |
f05b9d93 NP |
5001 | /* Parse the loop condition. In the case of a foreach |
5002 | statement, there is no loop condition. */ | |
a5812bdc | 5003 | gcc_assert (!parser->objc_could_be_foreach_context); |
f05b9d93 | 5004 | if (!is_foreach_statement) |
27bf414c | 5005 | { |
f05b9d93 NP |
5006 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
5007 | { | |
5008 | c_parser_consume_token (parser); | |
5009 | cond = NULL_TREE; | |
5010 | } | |
5011 | else | |
5012 | { | |
5013 | cond = c_parser_condition (parser); | |
5014 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
5015 | } | |
27bf414c | 5016 | } |
f05b9d93 NP |
5017 | /* Parse the increment expression (the third expression in a |
5018 | for-statement). In the case of a foreach-statement, this is | |
5019 | the expression that follows the 'in'. */ | |
5020 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
27bf414c | 5021 | { |
f05b9d93 NP |
5022 | if (is_foreach_statement) |
5023 | { | |
5024 | c_parser_error (parser, "missing collection in fast enumeration"); | |
5025 | collection_expression = error_mark_node; | |
5026 | } | |
5027 | else | |
5028 | incr = c_process_expr_stmt (loc, NULL_TREE); | |
27bf414c | 5029 | } |
27bf414c | 5030 | else |
f05b9d93 NP |
5031 | { |
5032 | if (is_foreach_statement) | |
69a97201 NP |
5033 | collection_expression = c_fully_fold (c_parser_expression (parser).value, |
5034 | false, NULL); | |
f05b9d93 NP |
5035 | else |
5036 | incr = c_process_expr_stmt (loc, c_parser_expression (parser).value); | |
5037 | } | |
27bf414c JM |
5038 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
5039 | } | |
27bf414c JM |
5040 | save_break = c_break_label; |
5041 | c_break_label = NULL_TREE; | |
5042 | save_cont = c_cont_label; | |
5043 | c_cont_label = NULL_TREE; | |
5044 | body = c_parser_c99_block_statement (parser); | |
f05b9d93 NP |
5045 | if (is_foreach_statement) |
5046 | objc_finish_foreach_loop (loc, object_expression, collection_expression, body, c_break_label, c_cont_label); | |
5047 | else | |
5048 | c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true); | |
5049 | add_stmt (c_end_compound_stmt (loc, block, flag_isoc99 || c_dialect_objc ())); | |
27bf414c JM |
5050 | c_break_label = save_break; |
5051 | c_cont_label = save_cont; | |
5052 | } | |
5053 | ||
5054 | /* Parse an asm statement, a GNU extension. This is a full-blown asm | |
5055 | statement with inputs, outputs, clobbers, and volatile tag | |
5056 | allowed. | |
5057 | ||
5058 | asm-statement: | |
5059 | asm type-qualifier[opt] ( asm-argument ) ; | |
1c384bf1 | 5060 | asm type-qualifier[opt] goto ( asm-goto-argument ) ; |
27bf414c JM |
5061 | |
5062 | asm-argument: | |
5063 | asm-string-literal | |
5064 | asm-string-literal : asm-operands[opt] | |
5065 | asm-string-literal : asm-operands[opt] : asm-operands[opt] | |
1c384bf1 RH |
5066 | asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt] |
5067 | ||
5068 | asm-goto-argument: | |
5069 | asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \ | |
5070 | : asm-goto-operands | |
27bf414c JM |
5071 | |
5072 | Qualifiers other than volatile are accepted in the syntax but | |
5073 | warned for. */ | |
5074 | ||
5075 | static tree | |
5076 | c_parser_asm_statement (c_parser *parser) | |
5077 | { | |
1c384bf1 RH |
5078 | tree quals, str, outputs, inputs, clobbers, labels, ret; |
5079 | bool simple, is_goto; | |
c2255bc4 | 5080 | location_t asm_loc = c_parser_peek_token (parser)->location; |
1c384bf1 RH |
5081 | int section, nsections; |
5082 | ||
27bf414c JM |
5083 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM)); |
5084 | c_parser_consume_token (parser); | |
5085 | if (c_parser_next_token_is_keyword (parser, RID_VOLATILE)) | |
5086 | { | |
5087 | quals = c_parser_peek_token (parser)->value; | |
5088 | c_parser_consume_token (parser); | |
5089 | } | |
5090 | else if (c_parser_next_token_is_keyword (parser, RID_CONST) | |
5091 | || c_parser_next_token_is_keyword (parser, RID_RESTRICT)) | |
5092 | { | |
3ba09659 AH |
5093 | warning_at (c_parser_peek_token (parser)->location, |
5094 | 0, | |
5095 | "%E qualifier ignored on asm", | |
5096 | c_parser_peek_token (parser)->value); | |
27bf414c JM |
5097 | quals = NULL_TREE; |
5098 | c_parser_consume_token (parser); | |
5099 | } | |
5100 | else | |
5101 | quals = NULL_TREE; | |
1c384bf1 RH |
5102 | |
5103 | is_goto = false; | |
5104 | if (c_parser_next_token_is_keyword (parser, RID_GOTO)) | |
5105 | { | |
5106 | c_parser_consume_token (parser); | |
5107 | is_goto = true; | |
5108 | } | |
5109 | ||
27bf414c | 5110 | /* ??? Follow the C++ parser rather than using the |
46c2514e TT |
5111 | lex_untranslated_string kludge. */ |
5112 | parser->lex_untranslated_string = true; | |
1c384bf1 RH |
5113 | ret = NULL; |
5114 | ||
27bf414c | 5115 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
1c384bf1 RH |
5116 | goto error; |
5117 | ||
27bf414c | 5118 | str = c_parser_asm_string_literal (parser); |
b85eb797 | 5119 | if (str == NULL_TREE) |
1c384bf1 RH |
5120 | goto error_close_paren; |
5121 | ||
5122 | simple = true; | |
5123 | outputs = NULL_TREE; | |
5124 | inputs = NULL_TREE; | |
5125 | clobbers = NULL_TREE; | |
5126 | labels = NULL_TREE; | |
5127 | ||
5128 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
5129 | goto done_asm; | |
5130 | ||
5131 | /* Parse each colon-delimited section of operands. */ | |
5132 | nsections = 3 + is_goto; | |
5133 | for (section = 0; section < nsections; ++section) | |
b85eb797 | 5134 | { |
1c384bf1 RH |
5135 | if (!c_parser_require (parser, CPP_COLON, |
5136 | is_goto | |
5137 | ? "expected %<:%>" | |
5138 | : "expected %<:%> or %<)%>")) | |
5139 | goto error_close_paren; | |
5140 | ||
5141 | /* Once past any colon, we're no longer a simple asm. */ | |
5142 | simple = false; | |
5143 | ||
5144 | if ((!c_parser_next_token_is (parser, CPP_COLON) | |
5145 | && !c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
5146 | || section == 3) | |
5147 | switch (section) | |
5148 | { | |
5149 | case 0: | |
5150 | /* For asm goto, we don't allow output operands, but reserve | |
5151 | the slot for a future extension that does allow them. */ | |
5152 | if (!is_goto) | |
5153 | outputs = c_parser_asm_operands (parser, false); | |
5154 | break; | |
5155 | case 1: | |
5156 | inputs = c_parser_asm_operands (parser, true); | |
5157 | break; | |
5158 | case 2: | |
5159 | clobbers = c_parser_asm_clobbers (parser); | |
5160 | break; | |
5161 | case 3: | |
5162 | labels = c_parser_asm_goto_operands (parser); | |
5163 | break; | |
5164 | default: | |
5165 | gcc_unreachable (); | |
5166 | } | |
5167 | ||
5168 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto) | |
5169 | goto done_asm; | |
27bf414c | 5170 | } |
1c384bf1 | 5171 | |
27bf414c | 5172 | done_asm: |
27bf414c JM |
5173 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
5174 | { | |
5175 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
1c384bf1 | 5176 | goto error; |
27bf414c | 5177 | } |
1c384bf1 | 5178 | |
27bf414c JM |
5179 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) |
5180 | c_parser_skip_to_end_of_block_or_statement (parser); | |
1c384bf1 | 5181 | |
c2255bc4 | 5182 | ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs, |
1c384bf1 RH |
5183 | clobbers, labels, simple)); |
5184 | ||
5185 | error: | |
5186 | parser->lex_untranslated_string = false; | |
27bf414c | 5187 | return ret; |
1c384bf1 RH |
5188 | |
5189 | error_close_paren: | |
5190 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5191 | goto error; | |
27bf414c JM |
5192 | } |
5193 | ||
46bdb9cf JM |
5194 | /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but |
5195 | not outputs), apply the default conversion of functions and arrays | |
5196 | to pointers. | |
27bf414c JM |
5197 | |
5198 | asm-operands: | |
5199 | asm-operand | |
5200 | asm-operands , asm-operand | |
5201 | ||
5202 | asm-operand: | |
5203 | asm-string-literal ( expression ) | |
5204 | [ identifier ] asm-string-literal ( expression ) | |
5205 | */ | |
5206 | ||
5207 | static tree | |
46bdb9cf | 5208 | c_parser_asm_operands (c_parser *parser, bool convert_p) |
27bf414c JM |
5209 | { |
5210 | tree list = NULL_TREE; | |
c2255bc4 | 5211 | location_t loc; |
27bf414c JM |
5212 | while (true) |
5213 | { | |
f2a71bbc JM |
5214 | tree name, str; |
5215 | struct c_expr expr; | |
27bf414c JM |
5216 | if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) |
5217 | { | |
5218 | c_parser_consume_token (parser); | |
5219 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5220 | { | |
5221 | tree id = c_parser_peek_token (parser)->value; | |
5222 | c_parser_consume_token (parser); | |
5223 | name = build_string (IDENTIFIER_LENGTH (id), | |
5224 | IDENTIFIER_POINTER (id)); | |
5225 | } | |
5226 | else | |
5227 | { | |
5228 | c_parser_error (parser, "expected identifier"); | |
5229 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL); | |
5230 | return NULL_TREE; | |
5231 | } | |
5232 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
5233 | "expected %<]%>"); | |
5234 | } | |
5235 | else | |
5236 | name = NULL_TREE; | |
5237 | str = c_parser_asm_string_literal (parser); | |
5238 | if (str == NULL_TREE) | |
5239 | return NULL_TREE; | |
46c2514e | 5240 | parser->lex_untranslated_string = false; |
27bf414c JM |
5241 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
5242 | { | |
46c2514e | 5243 | parser->lex_untranslated_string = true; |
27bf414c JM |
5244 | return NULL_TREE; |
5245 | } | |
c2255bc4 | 5246 | loc = c_parser_peek_token (parser)->location; |
f2a71bbc | 5247 | expr = c_parser_expression (parser); |
ebfbbdc5 | 5248 | mark_exp_read (expr.value); |
46bdb9cf | 5249 | if (convert_p) |
c2255bc4 | 5250 | expr = default_function_array_conversion (loc, expr); |
928c19bb | 5251 | expr.value = c_fully_fold (expr.value, false, NULL); |
46c2514e | 5252 | parser->lex_untranslated_string = true; |
27bf414c JM |
5253 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
5254 | { | |
5255 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
5256 | return NULL_TREE; | |
5257 | } | |
5258 | list = chainon (list, build_tree_list (build_tree_list (name, str), | |
f2a71bbc | 5259 | expr.value)); |
27bf414c JM |
5260 | if (c_parser_next_token_is (parser, CPP_COMMA)) |
5261 | c_parser_consume_token (parser); | |
5262 | else | |
5263 | break; | |
5264 | } | |
5265 | return list; | |
5266 | } | |
5267 | ||
5268 | /* Parse asm clobbers, a GNU extension. | |
5269 | ||
5270 | asm-clobbers: | |
5271 | asm-string-literal | |
5272 | asm-clobbers , asm-string-literal | |
5273 | */ | |
5274 | ||
5275 | static tree | |
5276 | c_parser_asm_clobbers (c_parser *parser) | |
5277 | { | |
5278 | tree list = NULL_TREE; | |
5279 | while (true) | |
5280 | { | |
5281 | tree str = c_parser_asm_string_literal (parser); | |
5282 | if (str) | |
5283 | list = tree_cons (NULL_TREE, str, list); | |
5284 | else | |
5285 | return NULL_TREE; | |
5286 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5287 | c_parser_consume_token (parser); | |
5288 | else | |
5289 | break; | |
5290 | } | |
5291 | return list; | |
5292 | } | |
5293 | ||
1c384bf1 | 5294 | /* Parse asm goto labels, a GNU extension. |
b8698a0f | 5295 | |
1c384bf1 RH |
5296 | asm-goto-operands: |
5297 | identifier | |
5298 | asm-goto-operands , identifier | |
5299 | */ | |
5300 | ||
5301 | static tree | |
5302 | c_parser_asm_goto_operands (c_parser *parser) | |
5303 | { | |
5304 | tree list = NULL_TREE; | |
5305 | while (true) | |
5306 | { | |
5307 | tree name, label; | |
5308 | ||
5309 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5310 | { | |
5311 | c_token *tok = c_parser_peek_token (parser); | |
5312 | name = tok->value; | |
5313 | label = lookup_label_for_goto (tok->location, name); | |
5314 | c_parser_consume_token (parser); | |
5315 | TREE_USED (label) = 1; | |
5316 | } | |
5317 | else | |
5318 | { | |
5319 | c_parser_error (parser, "expected identifier"); | |
5320 | return NULL_TREE; | |
5321 | } | |
5322 | ||
5323 | name = build_string (IDENTIFIER_LENGTH (name), | |
5324 | IDENTIFIER_POINTER (name)); | |
5325 | list = tree_cons (name, label, list); | |
5326 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
5327 | c_parser_consume_token (parser); | |
5328 | else | |
5329 | return nreverse (list); | |
5330 | } | |
5331 | } | |
5332 | ||
27bf414c JM |
5333 | /* Parse an expression other than a compound expression; that is, an |
5334 | assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not | |
5335 | NULL then it is an Objective-C message expression which is the | |
5336 | primary-expression starting the expression as an initializer. | |
5337 | ||
5338 | assignment-expression: | |
5339 | conditional-expression | |
5340 | unary-expression assignment-operator assignment-expression | |
5341 | ||
5342 | assignment-operator: one of | |
5343 | = *= /= %= += -= <<= >>= &= ^= |= | |
5344 | ||
5345 | In GNU C we accept any conditional expression on the LHS and | |
5346 | diagnose the invalid lvalue rather than producing a syntax | |
5347 | error. */ | |
5348 | ||
5349 | static struct c_expr | |
5350 | c_parser_expr_no_commas (c_parser *parser, struct c_expr *after) | |
5351 | { | |
5352 | struct c_expr lhs, rhs, ret; | |
5353 | enum tree_code code; | |
c2255bc4 | 5354 | location_t op_location, exp_location; |
27bf414c JM |
5355 | gcc_assert (!after || c_dialect_objc ()); |
5356 | lhs = c_parser_conditional_expression (parser, after); | |
c9f9eb5d | 5357 | op_location = c_parser_peek_token (parser)->location; |
27bf414c JM |
5358 | switch (c_parser_peek_token (parser)->type) |
5359 | { | |
5360 | case CPP_EQ: | |
5361 | code = NOP_EXPR; | |
5362 | break; | |
5363 | case CPP_MULT_EQ: | |
5364 | code = MULT_EXPR; | |
5365 | break; | |
5366 | case CPP_DIV_EQ: | |
5367 | code = TRUNC_DIV_EXPR; | |
5368 | break; | |
5369 | case CPP_MOD_EQ: | |
5370 | code = TRUNC_MOD_EXPR; | |
5371 | break; | |
5372 | case CPP_PLUS_EQ: | |
5373 | code = PLUS_EXPR; | |
5374 | break; | |
5375 | case CPP_MINUS_EQ: | |
5376 | code = MINUS_EXPR; | |
5377 | break; | |
5378 | case CPP_LSHIFT_EQ: | |
5379 | code = LSHIFT_EXPR; | |
5380 | break; | |
5381 | case CPP_RSHIFT_EQ: | |
5382 | code = RSHIFT_EXPR; | |
5383 | break; | |
5384 | case CPP_AND_EQ: | |
5385 | code = BIT_AND_EXPR; | |
5386 | break; | |
5387 | case CPP_XOR_EQ: | |
5388 | code = BIT_XOR_EXPR; | |
5389 | break; | |
5390 | case CPP_OR_EQ: | |
5391 | code = BIT_IOR_EXPR; | |
5392 | break; | |
5393 | default: | |
5394 | return lhs; | |
5395 | } | |
5396 | c_parser_consume_token (parser); | |
c2255bc4 | 5397 | exp_location = c_parser_peek_token (parser)->location; |
27bf414c | 5398 | rhs = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 | 5399 | rhs = default_function_array_read_conversion (exp_location, rhs); |
32e8bb8e | 5400 | ret.value = build_modify_expr (op_location, lhs.value, lhs.original_type, |
c2255bc4 AH |
5401 | code, exp_location, rhs.value, |
5402 | rhs.original_type); | |
27bf414c JM |
5403 | if (code == NOP_EXPR) |
5404 | ret.original_code = MODIFY_EXPR; | |
5405 | else | |
5406 | { | |
5407 | TREE_NO_WARNING (ret.value) = 1; | |
5408 | ret.original_code = ERROR_MARK; | |
5409 | } | |
6866c6e8 | 5410 | ret.original_type = NULL; |
27bf414c JM |
5411 | return ret; |
5412 | } | |
5413 | ||
5414 | /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER | |
5415 | is not NULL then it is an Objective-C message expression which is | |
5416 | the primary-expression starting the expression as an initializer. | |
5417 | ||
5418 | conditional-expression: | |
5419 | logical-OR-expression | |
5420 | logical-OR-expression ? expression : conditional-expression | |
5421 | ||
5422 | GNU extensions: | |
5423 | ||
5424 | conditional-expression: | |
5425 | logical-OR-expression ? : conditional-expression | |
5426 | */ | |
5427 | ||
5428 | static struct c_expr | |
5429 | c_parser_conditional_expression (c_parser *parser, struct c_expr *after) | |
5430 | { | |
5431 | struct c_expr cond, exp1, exp2, ret; | |
d166d4c3 | 5432 | location_t cond_loc, colon_loc, middle_loc; |
ba47d38d | 5433 | |
27bf414c | 5434 | gcc_assert (!after || c_dialect_objc ()); |
ba47d38d | 5435 | |
20906c66 | 5436 | cond = c_parser_binary_expression (parser, after, PREC_NONE); |
ba47d38d | 5437 | |
27bf414c JM |
5438 | if (c_parser_next_token_is_not (parser, CPP_QUERY)) |
5439 | return cond; | |
c2255bc4 | 5440 | cond_loc = c_parser_peek_token (parser)->location; |
ebfbbdc5 | 5441 | cond = default_function_array_read_conversion (cond_loc, cond); |
27bf414c JM |
5442 | c_parser_consume_token (parser); |
5443 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
5444 | { | |
8ce94e44 | 5445 | tree eptype = NULL_TREE; |
d166d4c3 AK |
5446 | |
5447 | middle_loc = c_parser_peek_token (parser)->location; | |
c1771a20 | 5448 | pedwarn (middle_loc, OPT_Wpedantic, |
509c9d60 | 5449 | "ISO C forbids omitting the middle term of a ?: expression"); |
d166d4c3 | 5450 | warn_for_omitted_condop (middle_loc, cond.value); |
8ce94e44 JM |
5451 | if (TREE_CODE (cond.value) == EXCESS_PRECISION_EXPR) |
5452 | { | |
5453 | eptype = TREE_TYPE (cond.value); | |
5454 | cond.value = TREE_OPERAND (cond.value, 0); | |
5455 | } | |
27bf414c | 5456 | /* Make sure first operand is calculated only once. */ |
928c19bb | 5457 | exp1.value = c_save_expr (default_conversion (cond.value)); |
8ce94e44 JM |
5458 | if (eptype) |
5459 | exp1.value = build1 (EXCESS_PRECISION_EXPR, eptype, exp1.value); | |
6866c6e8 | 5460 | exp1.original_type = NULL; |
ba47d38d | 5461 | cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value); |
7d882b83 | 5462 | c_inhibit_evaluation_warnings += cond.value == truthvalue_true_node; |
27bf414c JM |
5463 | } |
5464 | else | |
5465 | { | |
5466 | cond.value | |
85498824 | 5467 | = c_objc_common_truthvalue_conversion |
ba47d38d | 5468 | (cond_loc, default_conversion (cond.value)); |
7d882b83 | 5469 | c_inhibit_evaluation_warnings += cond.value == truthvalue_false_node; |
46bdb9cf | 5470 | exp1 = c_parser_expression_conv (parser); |
ebfbbdc5 | 5471 | mark_exp_read (exp1.value); |
7d882b83 ILT |
5472 | c_inhibit_evaluation_warnings += |
5473 | ((cond.value == truthvalue_true_node) | |
5474 | - (cond.value == truthvalue_false_node)); | |
27bf414c | 5475 | } |
744aa42f ILT |
5476 | |
5477 | colon_loc = c_parser_peek_token (parser)->location; | |
27bf414c JM |
5478 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
5479 | { | |
7d882b83 | 5480 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
27bf414c JM |
5481 | ret.value = error_mark_node; |
5482 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5483 | ret.original_type = NULL; |
27bf414c JM |
5484 | return ret; |
5485 | } | |
c2255bc4 AH |
5486 | { |
5487 | location_t exp2_loc = c_parser_peek_token (parser)->location; | |
5488 | exp2 = c_parser_conditional_expression (parser, NULL); | |
ebfbbdc5 | 5489 | exp2 = default_function_array_read_conversion (exp2_loc, exp2); |
c2255bc4 | 5490 | } |
7d882b83 | 5491 | c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node; |
744aa42f | 5492 | ret.value = build_conditional_expr (colon_loc, cond.value, |
928c19bb | 5493 | cond.original_code == C_MAYBE_CONST_EXPR, |
d130ae11 ILT |
5494 | exp1.value, exp1.original_type, |
5495 | exp2.value, exp2.original_type); | |
27bf414c | 5496 | ret.original_code = ERROR_MARK; |
6866c6e8 ILT |
5497 | if (exp1.value == error_mark_node || exp2.value == error_mark_node) |
5498 | ret.original_type = NULL; | |
5499 | else | |
5500 | { | |
5501 | tree t1, t2; | |
5502 | ||
5503 | /* If both sides are enum type, the default conversion will have | |
5504 | made the type of the result be an integer type. We want to | |
5505 | remember the enum types we started with. */ | |
5506 | t1 = exp1.original_type ? exp1.original_type : TREE_TYPE (exp1.value); | |
5507 | t2 = exp2.original_type ? exp2.original_type : TREE_TYPE (exp2.value); | |
5508 | ret.original_type = ((t1 != error_mark_node | |
5509 | && t2 != error_mark_node | |
5510 | && (TYPE_MAIN_VARIANT (t1) | |
5511 | == TYPE_MAIN_VARIANT (t2))) | |
5512 | ? t1 | |
5513 | : NULL); | |
5514 | } | |
27bf414c JM |
5515 | return ret; |
5516 | } | |
5517 | ||
5518 | /* Parse a binary expression; that is, a logical-OR-expression (C90 | |
5519 | 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is | |
5520 | an Objective-C message expression which is the primary-expression | |
20906c66 JJ |
5521 | starting the expression as an initializer. PREC is the starting |
5522 | precedence, usually PREC_NONE. | |
27bf414c JM |
5523 | |
5524 | multiplicative-expression: | |
5525 | cast-expression | |
5526 | multiplicative-expression * cast-expression | |
5527 | multiplicative-expression / cast-expression | |
5528 | multiplicative-expression % cast-expression | |
5529 | ||
5530 | additive-expression: | |
5531 | multiplicative-expression | |
5532 | additive-expression + multiplicative-expression | |
5533 | additive-expression - multiplicative-expression | |
5534 | ||
5535 | shift-expression: | |
5536 | additive-expression | |
5537 | shift-expression << additive-expression | |
5538 | shift-expression >> additive-expression | |
5539 | ||
5540 | relational-expression: | |
5541 | shift-expression | |
5542 | relational-expression < shift-expression | |
5543 | relational-expression > shift-expression | |
5544 | relational-expression <= shift-expression | |
5545 | relational-expression >= shift-expression | |
5546 | ||
5547 | equality-expression: | |
5548 | relational-expression | |
5549 | equality-expression == relational-expression | |
5550 | equality-expression != relational-expression | |
5551 | ||
5552 | AND-expression: | |
5553 | equality-expression | |
5554 | AND-expression & equality-expression | |
5555 | ||
5556 | exclusive-OR-expression: | |
5557 | AND-expression | |
5558 | exclusive-OR-expression ^ AND-expression | |
5559 | ||
5560 | inclusive-OR-expression: | |
5561 | exclusive-OR-expression | |
5562 | inclusive-OR-expression | exclusive-OR-expression | |
5563 | ||
5564 | logical-AND-expression: | |
5565 | inclusive-OR-expression | |
5566 | logical-AND-expression && inclusive-OR-expression | |
5567 | ||
5568 | logical-OR-expression: | |
5569 | logical-AND-expression | |
5570 | logical-OR-expression || logical-AND-expression | |
5571 | */ | |
5572 | ||
5573 | static struct c_expr | |
20906c66 JJ |
5574 | c_parser_binary_expression (c_parser *parser, struct c_expr *after, |
5575 | enum c_parser_prec prec) | |
27bf414c JM |
5576 | { |
5577 | /* A binary expression is parsed using operator-precedence parsing, | |
5578 | with the operands being cast expressions. All the binary | |
5579 | operators are left-associative. Thus a binary expression is of | |
5580 | form: | |
5581 | ||
5582 | E0 op1 E1 op2 E2 ... | |
5583 | ||
5584 | which we represent on a stack. On the stack, the precedence | |
5585 | levels are strictly increasing. When a new operator is | |
5586 | encountered of higher precedence than that at the top of the | |
5587 | stack, it is pushed; its LHS is the top expression, and its RHS | |
5588 | is everything parsed until it is popped. When a new operator is | |
5589 | encountered with precedence less than or equal to that at the top | |
5590 | of the stack, triples E[i-1] op[i] E[i] are popped and replaced | |
5591 | by the result of the operation until the operator at the top of | |
5592 | the stack has lower precedence than the new operator or there is | |
5593 | only one element on the stack; then the top expression is the LHS | |
5594 | of the new operator. In the case of logical AND and OR | |
7d882b83 ILT |
5595 | expressions, we also need to adjust c_inhibit_evaluation_warnings |
5596 | as appropriate when the operators are pushed and popped. */ | |
27bf414c | 5597 | |
27bf414c JM |
5598 | struct { |
5599 | /* The expression at this stack level. */ | |
5600 | struct c_expr expr; | |
5601 | /* The precedence of the operator on its left, PREC_NONE at the | |
5602 | bottom of the stack. */ | |
20906c66 | 5603 | enum c_parser_prec prec; |
27bf414c JM |
5604 | /* The operation on its left. */ |
5605 | enum tree_code op; | |
ca80e52b EB |
5606 | /* The source location of this operation. */ |
5607 | location_t loc; | |
27bf414c JM |
5608 | } stack[NUM_PRECS]; |
5609 | int sp; | |
ba47d38d | 5610 | /* Location of the binary operator. */ |
1f6d0c60 | 5611 | location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */ |
27bf414c JM |
5612 | #define POP \ |
5613 | do { \ | |
5614 | switch (stack[sp].op) \ | |
5615 | { \ | |
5616 | case TRUTH_ANDIF_EXPR: \ | |
7d882b83 ILT |
5617 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
5618 | == truthvalue_false_node); \ | |
27bf414c JM |
5619 | break; \ |
5620 | case TRUTH_ORIF_EXPR: \ | |
7d882b83 ILT |
5621 | c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \ |
5622 | == truthvalue_true_node); \ | |
27bf414c JM |
5623 | break; \ |
5624 | default: \ | |
5625 | break; \ | |
5626 | } \ | |
f2a71bbc | 5627 | stack[sp - 1].expr \ |
ebfbbdc5 JJ |
5628 | = default_function_array_read_conversion (stack[sp - 1].loc, \ |
5629 | stack[sp - 1].expr); \ | |
f2a71bbc | 5630 | stack[sp].expr \ |
ebfbbdc5 JJ |
5631 | = default_function_array_read_conversion (stack[sp].loc, \ |
5632 | stack[sp].expr); \ | |
ca80e52b | 5633 | stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \ |
ba47d38d | 5634 | stack[sp].op, \ |
27bf414c JM |
5635 | stack[sp - 1].expr, \ |
5636 | stack[sp].expr); \ | |
5637 | sp--; \ | |
5638 | } while (0) | |
5639 | gcc_assert (!after || c_dialect_objc ()); | |
ca80e52b | 5640 | stack[0].loc = c_parser_peek_token (parser)->location; |
27bf414c | 5641 | stack[0].expr = c_parser_cast_expression (parser, after); |
20906c66 | 5642 | stack[0].prec = prec; |
27bf414c JM |
5643 | sp = 0; |
5644 | while (true) | |
5645 | { | |
20906c66 | 5646 | enum c_parser_prec oprec; |
27bf414c JM |
5647 | enum tree_code ocode; |
5648 | if (parser->error) | |
5649 | goto out; | |
5650 | switch (c_parser_peek_token (parser)->type) | |
5651 | { | |
5652 | case CPP_MULT: | |
5653 | oprec = PREC_MULT; | |
5654 | ocode = MULT_EXPR; | |
5655 | break; | |
5656 | case CPP_DIV: | |
5657 | oprec = PREC_MULT; | |
5658 | ocode = TRUNC_DIV_EXPR; | |
5659 | break; | |
5660 | case CPP_MOD: | |
5661 | oprec = PREC_MULT; | |
5662 | ocode = TRUNC_MOD_EXPR; | |
5663 | break; | |
5664 | case CPP_PLUS: | |
5665 | oprec = PREC_ADD; | |
5666 | ocode = PLUS_EXPR; | |
5667 | break; | |
5668 | case CPP_MINUS: | |
5669 | oprec = PREC_ADD; | |
5670 | ocode = MINUS_EXPR; | |
5671 | break; | |
5672 | case CPP_LSHIFT: | |
5673 | oprec = PREC_SHIFT; | |
5674 | ocode = LSHIFT_EXPR; | |
5675 | break; | |
5676 | case CPP_RSHIFT: | |
5677 | oprec = PREC_SHIFT; | |
5678 | ocode = RSHIFT_EXPR; | |
5679 | break; | |
5680 | case CPP_LESS: | |
5681 | oprec = PREC_REL; | |
5682 | ocode = LT_EXPR; | |
5683 | break; | |
5684 | case CPP_GREATER: | |
5685 | oprec = PREC_REL; | |
5686 | ocode = GT_EXPR; | |
5687 | break; | |
5688 | case CPP_LESS_EQ: | |
5689 | oprec = PREC_REL; | |
5690 | ocode = LE_EXPR; | |
5691 | break; | |
5692 | case CPP_GREATER_EQ: | |
5693 | oprec = PREC_REL; | |
5694 | ocode = GE_EXPR; | |
5695 | break; | |
5696 | case CPP_EQ_EQ: | |
5697 | oprec = PREC_EQ; | |
5698 | ocode = EQ_EXPR; | |
5699 | break; | |
5700 | case CPP_NOT_EQ: | |
5701 | oprec = PREC_EQ; | |
5702 | ocode = NE_EXPR; | |
5703 | break; | |
5704 | case CPP_AND: | |
5705 | oprec = PREC_BITAND; | |
5706 | ocode = BIT_AND_EXPR; | |
5707 | break; | |
5708 | case CPP_XOR: | |
5709 | oprec = PREC_BITXOR; | |
5710 | ocode = BIT_XOR_EXPR; | |
5711 | break; | |
5712 | case CPP_OR: | |
5713 | oprec = PREC_BITOR; | |
5714 | ocode = BIT_IOR_EXPR; | |
5715 | break; | |
5716 | case CPP_AND_AND: | |
5717 | oprec = PREC_LOGAND; | |
5718 | ocode = TRUTH_ANDIF_EXPR; | |
5719 | break; | |
5720 | case CPP_OR_OR: | |
5721 | oprec = PREC_LOGOR; | |
5722 | ocode = TRUTH_ORIF_EXPR; | |
5723 | break; | |
5724 | default: | |
5725 | /* Not a binary operator, so end of the binary | |
5726 | expression. */ | |
5727 | goto out; | |
5728 | } | |
ba47d38d | 5729 | binary_loc = c_parser_peek_token (parser)->location; |
27bf414c | 5730 | while (oprec <= stack[sp].prec) |
20906c66 JJ |
5731 | { |
5732 | if (sp == 0) | |
5733 | goto out; | |
5734 | POP; | |
5735 | } | |
5736 | c_parser_consume_token (parser); | |
27bf414c JM |
5737 | switch (ocode) |
5738 | { | |
5739 | case TRUTH_ANDIF_EXPR: | |
f2a71bbc | 5740 | stack[sp].expr |
ebfbbdc5 JJ |
5741 | = default_function_array_read_conversion (stack[sp].loc, |
5742 | stack[sp].expr); | |
85498824 | 5743 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 5744 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
5745 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5746 | == truthvalue_false_node); | |
27bf414c JM |
5747 | break; |
5748 | case TRUTH_ORIF_EXPR: | |
f2a71bbc | 5749 | stack[sp].expr |
ebfbbdc5 JJ |
5750 | = default_function_array_read_conversion (stack[sp].loc, |
5751 | stack[sp].expr); | |
85498824 | 5752 | stack[sp].expr.value = c_objc_common_truthvalue_conversion |
ca80e52b | 5753 | (stack[sp].loc, default_conversion (stack[sp].expr.value)); |
7d882b83 ILT |
5754 | c_inhibit_evaluation_warnings += (stack[sp].expr.value |
5755 | == truthvalue_true_node); | |
27bf414c JM |
5756 | break; |
5757 | default: | |
5758 | break; | |
5759 | } | |
5760 | sp++; | |
ca80e52b | 5761 | stack[sp].loc = binary_loc; |
27bf414c JM |
5762 | stack[sp].expr = c_parser_cast_expression (parser, NULL); |
5763 | stack[sp].prec = oprec; | |
5764 | stack[sp].op = ocode; | |
c2255bc4 | 5765 | stack[sp].loc = binary_loc; |
27bf414c JM |
5766 | } |
5767 | out: | |
5768 | while (sp > 0) | |
5769 | POP; | |
5770 | return stack[0].expr; | |
5771 | #undef POP | |
5772 | } | |
5773 | ||
5774 | /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not | |
5775 | NULL then it is an Objective-C message expression which is the | |
5776 | primary-expression starting the expression as an initializer. | |
5777 | ||
5778 | cast-expression: | |
5779 | unary-expression | |
5780 | ( type-name ) unary-expression | |
5781 | */ | |
5782 | ||
5783 | static struct c_expr | |
5784 | c_parser_cast_expression (c_parser *parser, struct c_expr *after) | |
5785 | { | |
c2255bc4 | 5786 | location_t cast_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
5787 | gcc_assert (!after || c_dialect_objc ()); |
5788 | if (after) | |
c2255bc4 AH |
5789 | return c_parser_postfix_expression_after_primary (parser, |
5790 | cast_loc, *after); | |
27bf414c JM |
5791 | /* If the expression begins with a parenthesized type name, it may |
5792 | be either a cast or a compound literal; we need to see whether | |
5793 | the next character is '{' to tell the difference. If not, it is | |
29ce73cb PB |
5794 | an unary expression. Full detection of unknown typenames here |
5795 | would require a 3-token lookahead. */ | |
27bf414c JM |
5796 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) |
5797 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5798 | { | |
5799 | struct c_type_name *type_name; | |
5800 | struct c_expr ret; | |
f2a71bbc | 5801 | struct c_expr expr; |
27bf414c JM |
5802 | c_parser_consume_token (parser); |
5803 | type_name = c_parser_type_name (parser); | |
5804 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
5805 | if (type_name == NULL) | |
5806 | { | |
5807 | ret.value = error_mark_node; | |
5808 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 5809 | ret.original_type = NULL; |
27bf414c JM |
5810 | return ret; |
5811 | } | |
33c9159e AH |
5812 | |
5813 | /* Save casted types in the function's used types hash table. */ | |
8d8d1a28 | 5814 | used_types_insert (type_name->specs->type); |
33c9159e | 5815 | |
27bf414c | 5816 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
24b97832 | 5817 | return c_parser_postfix_expression_after_paren_type (parser, type_name, |
c2255bc4 AH |
5818 | cast_loc); |
5819 | { | |
5820 | location_t expr_loc = c_parser_peek_token (parser)->location; | |
5821 | expr = c_parser_cast_expression (parser, NULL); | |
ebfbbdc5 | 5822 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 AH |
5823 | } |
5824 | ret.value = c_cast_expr (cast_loc, type_name, expr.value); | |
27bf414c | 5825 | ret.original_code = ERROR_MARK; |
6866c6e8 | 5826 | ret.original_type = NULL; |
27bf414c JM |
5827 | return ret; |
5828 | } | |
5829 | else | |
5830 | return c_parser_unary_expression (parser); | |
5831 | } | |
5832 | ||
5833 | /* Parse an unary expression (C90 6.3.3, C99 6.5.3). | |
5834 | ||
5835 | unary-expression: | |
5836 | postfix-expression | |
5837 | ++ unary-expression | |
5838 | -- unary-expression | |
5839 | unary-operator cast-expression | |
5840 | sizeof unary-expression | |
5841 | sizeof ( type-name ) | |
5842 | ||
5843 | unary-operator: one of | |
5844 | & * + - ~ ! | |
5845 | ||
5846 | GNU extensions: | |
5847 | ||
5848 | unary-expression: | |
5849 | __alignof__ unary-expression | |
5850 | __alignof__ ( type-name ) | |
5851 | && identifier | |
5852 | ||
48b0b196 | 5853 | (C11 permits _Alignof with type names only.) |
d19fa6b5 | 5854 | |
27bf414c JM |
5855 | unary-operator: one of |
5856 | __extension__ __real__ __imag__ | |
5857 | ||
0a35513e AH |
5858 | Transactional Memory: |
5859 | ||
5860 | unary-expression: | |
5861 | transaction-expression | |
5862 | ||
27bf414c JM |
5863 | In addition, the GNU syntax treats ++ and -- as unary operators, so |
5864 | they may be applied to cast expressions with errors for non-lvalues | |
5865 | given later. */ | |
5866 | ||
5867 | static struct c_expr | |
5868 | c_parser_unary_expression (c_parser *parser) | |
5869 | { | |
5870 | int ext; | |
46bdb9cf | 5871 | struct c_expr ret, op; |
c2255bc4 AH |
5872 | location_t op_loc = c_parser_peek_token (parser)->location; |
5873 | location_t exp_loc; | |
6866c6e8 ILT |
5874 | ret.original_code = ERROR_MARK; |
5875 | ret.original_type = NULL; | |
27bf414c JM |
5876 | switch (c_parser_peek_token (parser)->type) |
5877 | { | |
5878 | case CPP_PLUS_PLUS: | |
5879 | c_parser_consume_token (parser); | |
c2255bc4 | 5880 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5881 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5882 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5883 | return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op); |
27bf414c JM |
5884 | case CPP_MINUS_MINUS: |
5885 | c_parser_consume_token (parser); | |
c2255bc4 | 5886 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5887 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5888 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5889 | return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op); |
27bf414c JM |
5890 | case CPP_AND: |
5891 | c_parser_consume_token (parser); | |
ebfbbdc5 JJ |
5892 | op = c_parser_cast_expression (parser, NULL); |
5893 | mark_exp_read (op.value); | |
5894 | return parser_build_unary_op (op_loc, ADDR_EXPR, op); | |
27bf414c JM |
5895 | case CPP_MULT: |
5896 | c_parser_consume_token (parser); | |
c2255bc4 | 5897 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5898 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5899 | op = default_function_array_read_conversion (exp_loc, op); |
dd865ef6 | 5900 | ret.value = build_indirect_ref (op_loc, op.value, RO_UNARY_STAR); |
27bf414c JM |
5901 | return ret; |
5902 | case CPP_PLUS: | |
44c21c7f | 5903 | if (!c_dialect_objc () && !in_system_header) |
c2255bc4 | 5904 | warning_at (op_loc, |
3ba09659 AH |
5905 | OPT_Wtraditional, |
5906 | "traditional C rejects the unary plus operator"); | |
c7412148 | 5907 | c_parser_consume_token (parser); |
c2255bc4 | 5908 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5909 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5910 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5911 | return parser_build_unary_op (op_loc, CONVERT_EXPR, op); |
27bf414c JM |
5912 | case CPP_MINUS: |
5913 | c_parser_consume_token (parser); | |
c2255bc4 | 5914 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5915 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5916 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5917 | return parser_build_unary_op (op_loc, NEGATE_EXPR, op); |
27bf414c JM |
5918 | case CPP_COMPL: |
5919 | c_parser_consume_token (parser); | |
c2255bc4 | 5920 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5921 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5922 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5923 | return parser_build_unary_op (op_loc, BIT_NOT_EXPR, op); |
27bf414c JM |
5924 | case CPP_NOT: |
5925 | c_parser_consume_token (parser); | |
c2255bc4 | 5926 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5927 | op = c_parser_cast_expression (parser, NULL); |
ebfbbdc5 | 5928 | op = default_function_array_read_conversion (exp_loc, op); |
c2255bc4 | 5929 | return parser_build_unary_op (op_loc, TRUTH_NOT_EXPR, op); |
27bf414c JM |
5930 | case CPP_AND_AND: |
5931 | /* Refer to the address of a label as a pointer. */ | |
5932 | c_parser_consume_token (parser); | |
5933 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
5934 | { | |
5935 | ret.value = finish_label_address_expr | |
c2255bc4 | 5936 | (c_parser_peek_token (parser)->value, op_loc); |
27bf414c | 5937 | c_parser_consume_token (parser); |
27bf414c JM |
5938 | } |
5939 | else | |
5940 | { | |
5941 | c_parser_error (parser, "expected identifier"); | |
5942 | ret.value = error_mark_node; | |
27bf414c | 5943 | } |
43f6dfd3 | 5944 | return ret; |
27bf414c JM |
5945 | case CPP_KEYWORD: |
5946 | switch (c_parser_peek_token (parser)->keyword) | |
5947 | { | |
5948 | case RID_SIZEOF: | |
5949 | return c_parser_sizeof_expression (parser); | |
5950 | case RID_ALIGNOF: | |
5951 | return c_parser_alignof_expression (parser); | |
5952 | case RID_EXTENSION: | |
5953 | c_parser_consume_token (parser); | |
5954 | ext = disable_extension_diagnostics (); | |
5955 | ret = c_parser_cast_expression (parser, NULL); | |
5956 | restore_extension_diagnostics (ext); | |
5957 | return ret; | |
5958 | case RID_REALPART: | |
5959 | c_parser_consume_token (parser); | |
c2255bc4 | 5960 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5961 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5962 | op = default_function_array_conversion (exp_loc, op); |
5963 | return parser_build_unary_op (op_loc, REALPART_EXPR, op); | |
27bf414c JM |
5964 | case RID_IMAGPART: |
5965 | c_parser_consume_token (parser); | |
c2255bc4 | 5966 | exp_loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 5967 | op = c_parser_cast_expression (parser, NULL); |
c2255bc4 AH |
5968 | op = default_function_array_conversion (exp_loc, op); |
5969 | return parser_build_unary_op (op_loc, IMAGPART_EXPR, op); | |
0a35513e AH |
5970 | case RID_TRANSACTION_ATOMIC: |
5971 | case RID_TRANSACTION_RELAXED: | |
5972 | return c_parser_transaction_expression (parser, | |
5973 | c_parser_peek_token (parser)->keyword); | |
27bf414c JM |
5974 | default: |
5975 | return c_parser_postfix_expression (parser); | |
5976 | } | |
5977 | default: | |
5978 | return c_parser_postfix_expression (parser); | |
5979 | } | |
5980 | } | |
5981 | ||
5982 | /* Parse a sizeof expression. */ | |
5983 | ||
5984 | static struct c_expr | |
5985 | c_parser_sizeof_expression (c_parser *parser) | |
5986 | { | |
5987 | struct c_expr expr; | |
c7412148 | 5988 | location_t expr_loc; |
27bf414c JM |
5989 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF)); |
5990 | c_parser_consume_token (parser); | |
7d882b83 | 5991 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
5992 | in_sizeof++; |
5993 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
5994 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
5995 | { | |
5996 | /* Either sizeof ( type-name ) or sizeof unary-expression | |
5997 | starting with a compound literal. */ | |
5998 | struct c_type_name *type_name; | |
5999 | c_parser_consume_token (parser); | |
c7412148 | 6000 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6001 | type_name = c_parser_type_name (parser); |
6002 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6003 | if (type_name == NULL) | |
6004 | { | |
6005 | struct c_expr ret; | |
7d882b83 | 6006 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
6007 | in_sizeof--; |
6008 | ret.value = error_mark_node; | |
6009 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 6010 | ret.original_type = NULL; |
27bf414c JM |
6011 | return ret; |
6012 | } | |
6013 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
6014 | { | |
6015 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
6016 | type_name, |
6017 | expr_loc); | |
27bf414c JM |
6018 | goto sizeof_expr; |
6019 | } | |
6020 | /* sizeof ( type-name ). */ | |
7d882b83 | 6021 | c_inhibit_evaluation_warnings--; |
27bf414c | 6022 | in_sizeof--; |
c2255bc4 | 6023 | return c_expr_sizeof_type (expr_loc, type_name); |
27bf414c JM |
6024 | } |
6025 | else | |
6026 | { | |
c7412148 | 6027 | expr_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6028 | expr = c_parser_unary_expression (parser); |
6029 | sizeof_expr: | |
7d882b83 | 6030 | c_inhibit_evaluation_warnings--; |
27bf414c | 6031 | in_sizeof--; |
ebfbbdc5 | 6032 | mark_exp_read (expr.value); |
27bf414c JM |
6033 | if (TREE_CODE (expr.value) == COMPONENT_REF |
6034 | && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1))) | |
3ba09659 | 6035 | error_at (expr_loc, "%<sizeof%> applied to a bit-field"); |
c2255bc4 | 6036 | return c_expr_sizeof_expr (expr_loc, expr); |
27bf414c JM |
6037 | } |
6038 | } | |
6039 | ||
6040 | /* Parse an alignof expression. */ | |
6041 | ||
6042 | static struct c_expr | |
6043 | c_parser_alignof_expression (c_parser *parser) | |
6044 | { | |
6045 | struct c_expr expr; | |
c2255bc4 | 6046 | location_t loc = c_parser_peek_token (parser)->location; |
d19fa6b5 | 6047 | tree alignof_spelling = c_parser_peek_token (parser)->value; |
27bf414c | 6048 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF)); |
d19fa6b5 | 6049 | /* A diagnostic is not required for the use of this identifier in |
48b0b196 | 6050 | the implementation namespace; only diagnose it for the C11 |
d19fa6b5 | 6051 | spelling because of existing code using the other spellings. */ |
48b0b196 | 6052 | if (!flag_isoc11 |
d19fa6b5 JM |
6053 | && strcmp (IDENTIFIER_POINTER (alignof_spelling), "_Alignof") == 0) |
6054 | { | |
6055 | if (flag_isoc99) | |
c1771a20 | 6056 | pedwarn (loc, OPT_Wpedantic, "ISO C99 does not support %qE", |
d19fa6b5 JM |
6057 | alignof_spelling); |
6058 | else | |
c1771a20 | 6059 | pedwarn (loc, OPT_Wpedantic, "ISO C90 does not support %qE", |
d19fa6b5 JM |
6060 | alignof_spelling); |
6061 | } | |
27bf414c | 6062 | c_parser_consume_token (parser); |
7d882b83 | 6063 | c_inhibit_evaluation_warnings++; |
27bf414c JM |
6064 | in_alignof++; |
6065 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN) | |
6066 | && c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
6067 | { | |
6068 | /* Either __alignof__ ( type-name ) or __alignof__ | |
6069 | unary-expression starting with a compound literal. */ | |
24b97832 | 6070 | location_t loc; |
27bf414c JM |
6071 | struct c_type_name *type_name; |
6072 | struct c_expr ret; | |
6073 | c_parser_consume_token (parser); | |
24b97832 | 6074 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6075 | type_name = c_parser_type_name (parser); |
6076 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
6077 | if (type_name == NULL) | |
6078 | { | |
6079 | struct c_expr ret; | |
7d882b83 | 6080 | c_inhibit_evaluation_warnings--; |
27bf414c JM |
6081 | in_alignof--; |
6082 | ret.value = error_mark_node; | |
6083 | ret.original_code = ERROR_MARK; | |
6866c6e8 | 6084 | ret.original_type = NULL; |
27bf414c JM |
6085 | return ret; |
6086 | } | |
6087 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
6088 | { | |
6089 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
6090 | type_name, |
6091 | loc); | |
27bf414c JM |
6092 | goto alignof_expr; |
6093 | } | |
6094 | /* alignof ( type-name ). */ | |
7d882b83 | 6095 | c_inhibit_evaluation_warnings--; |
27bf414c | 6096 | in_alignof--; |
c2255bc4 | 6097 | ret.value = c_alignof (loc, groktypename (type_name, NULL, NULL)); |
27bf414c | 6098 | ret.original_code = ERROR_MARK; |
6866c6e8 | 6099 | ret.original_type = NULL; |
27bf414c JM |
6100 | return ret; |
6101 | } | |
6102 | else | |
6103 | { | |
6104 | struct c_expr ret; | |
6105 | expr = c_parser_unary_expression (parser); | |
6106 | alignof_expr: | |
ebfbbdc5 | 6107 | mark_exp_read (expr.value); |
7d882b83 | 6108 | c_inhibit_evaluation_warnings--; |
27bf414c | 6109 | in_alignof--; |
c1771a20 | 6110 | pedwarn (loc, OPT_Wpedantic, "ISO C does not allow %<%E (expression)%>", |
d19fa6b5 | 6111 | alignof_spelling); |
c2255bc4 | 6112 | ret.value = c_alignof_expr (loc, expr.value); |
27bf414c | 6113 | ret.original_code = ERROR_MARK; |
6866c6e8 | 6114 | ret.original_type = NULL; |
27bf414c JM |
6115 | return ret; |
6116 | } | |
6117 | } | |
6118 | ||
f90e8e2e | 6119 | /* Helper function to read arguments of builtins which are interfaces |
2205ed25 | 6120 | for the middle-end nodes like COMPLEX_EXPR, VEC_PERM_EXPR and |
f90e8e2e AS |
6121 | others. The name of the builtin is passed using BNAME parameter. |
6122 | Function returns true if there were no errors while parsing and | |
86785830 | 6123 | stores the arguments in CEXPR_LIST. */ |
f90e8e2e AS |
6124 | static bool |
6125 | c_parser_get_builtin_args (c_parser *parser, const char *bname, | |
86785830 | 6126 | VEC(c_expr_t,gc) **ret_cexpr_list) |
f90e8e2e AS |
6127 | { |
6128 | location_t loc = c_parser_peek_token (parser)->location; | |
86785830 AS |
6129 | VEC (c_expr_t,gc) *cexpr_list; |
6130 | c_expr_t expr; | |
f90e8e2e | 6131 | |
86785830 | 6132 | *ret_cexpr_list = NULL; |
f90e8e2e AS |
6133 | if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN)) |
6134 | { | |
6135 | error_at (loc, "cannot take address of %qs", bname); | |
6136 | return false; | |
6137 | } | |
6138 | ||
6139 | c_parser_consume_token (parser); | |
6140 | ||
6141 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
6142 | { | |
6143 | c_parser_consume_token (parser); | |
6144 | return true; | |
6145 | } | |
86785830 AS |
6146 | |
6147 | expr = c_parser_expr_no_commas (parser, NULL); | |
6148 | cexpr_list = VEC_alloc (c_expr_t, gc, 1); | |
6149 | C_EXPR_APPEND (cexpr_list, expr); | |
6150 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
6151 | { | |
6152 | c_parser_consume_token (parser); | |
6153 | expr = c_parser_expr_no_commas (parser, NULL); | |
6154 | C_EXPR_APPEND (cexpr_list, expr); | |
6155 | } | |
f90e8e2e AS |
6156 | |
6157 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) | |
6158 | return false; | |
6159 | ||
86785830 | 6160 | *ret_cexpr_list = cexpr_list; |
f90e8e2e AS |
6161 | return true; |
6162 | } | |
6163 | ||
6164 | ||
27bf414c JM |
6165 | /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2). |
6166 | ||
6167 | postfix-expression: | |
6168 | primary-expression | |
6169 | postfix-expression [ expression ] | |
6170 | postfix-expression ( argument-expression-list[opt] ) | |
6171 | postfix-expression . identifier | |
6172 | postfix-expression -> identifier | |
6173 | postfix-expression ++ | |
6174 | postfix-expression -- | |
6175 | ( type-name ) { initializer-list } | |
6176 | ( type-name ) { initializer-list , } | |
6177 | ||
6178 | argument-expression-list: | |
6179 | argument-expression | |
6180 | argument-expression-list , argument-expression | |
6181 | ||
6182 | primary-expression: | |
6183 | identifier | |
6184 | constant | |
6185 | string-literal | |
6186 | ( expression ) | |
6187 | ||
6188 | GNU extensions: | |
6189 | ||
6190 | primary-expression: | |
6191 | __func__ | |
6192 | (treated as a keyword in GNU C) | |
6193 | __FUNCTION__ | |
6194 | __PRETTY_FUNCTION__ | |
6195 | ( compound-statement ) | |
6196 | __builtin_va_arg ( assignment-expression , type-name ) | |
6197 | __builtin_offsetof ( type-name , offsetof-member-designator ) | |
6198 | __builtin_choose_expr ( assignment-expression , | |
6199 | assignment-expression , | |
6200 | assignment-expression ) | |
6201 | __builtin_types_compatible_p ( type-name , type-name ) | |
d4a83c10 | 6202 | __builtin_complex ( assignment-expression , assignment-expression ) |
f90e8e2e AS |
6203 | __builtin_shuffle ( assignment-expression , assignment-expression ) |
6204 | __builtin_shuffle ( assignment-expression , | |
6205 | assignment-expression , | |
6206 | assignment-expression, ) | |
27bf414c JM |
6207 | |
6208 | offsetof-member-designator: | |
6209 | identifier | |
6210 | offsetof-member-designator . identifier | |
6211 | offsetof-member-designator [ expression ] | |
6212 | ||
6213 | Objective-C: | |
6214 | ||
6215 | primary-expression: | |
6216 | [ objc-receiver objc-message-args ] | |
6217 | @selector ( objc-selector-arg ) | |
6218 | @protocol ( identifier ) | |
6219 | @encode ( type-name ) | |
6220 | objc-string-literal | |
bede2adc | 6221 | Classname . identifier |
27bf414c JM |
6222 | */ |
6223 | ||
6224 | static struct c_expr | |
6225 | c_parser_postfix_expression (c_parser *parser) | |
6226 | { | |
f90e8e2e | 6227 | struct c_expr expr, e1; |
27bf414c | 6228 | struct c_type_name *t1, *t2; |
c2255bc4 | 6229 | location_t loc = c_parser_peek_token (parser)->location;; |
6866c6e8 ILT |
6230 | expr.original_code = ERROR_MARK; |
6231 | expr.original_type = NULL; | |
27bf414c JM |
6232 | switch (c_parser_peek_token (parser)->type) |
6233 | { | |
6234 | case CPP_NUMBER: | |
754ccf7c | 6235 | expr.value = c_parser_peek_token (parser)->value; |
754ccf7c JJ |
6236 | loc = c_parser_peek_token (parser)->location; |
6237 | c_parser_consume_token (parser); | |
6238 | if (TREE_CODE (expr.value) == FIXED_CST | |
6239 | && !targetm.fixed_point_supported_p ()) | |
6240 | { | |
6241 | error_at (loc, "fixed-point types not supported for this target"); | |
6242 | expr.value = error_mark_node; | |
6243 | } | |
6244 | break; | |
27bf414c | 6245 | case CPP_CHAR: |
b6baa67d KVH |
6246 | case CPP_CHAR16: |
6247 | case CPP_CHAR32: | |
27bf414c JM |
6248 | case CPP_WCHAR: |
6249 | expr.value = c_parser_peek_token (parser)->value; | |
27bf414c JM |
6250 | c_parser_consume_token (parser); |
6251 | break; | |
6252 | case CPP_STRING: | |
b6baa67d KVH |
6253 | case CPP_STRING16: |
6254 | case CPP_STRING32: | |
27bf414c | 6255 | case CPP_WSTRING: |
2c6e3f55 | 6256 | case CPP_UTF8STRING: |
27bf414c JM |
6257 | expr.value = c_parser_peek_token (parser)->value; |
6258 | expr.original_code = STRING_CST; | |
6259 | c_parser_consume_token (parser); | |
6260 | break; | |
6261 | case CPP_OBJC_STRING: | |
6262 | gcc_assert (c_dialect_objc ()); | |
6263 | expr.value | |
6264 | = objc_build_string_object (c_parser_peek_token (parser)->value); | |
27bf414c JM |
6265 | c_parser_consume_token (parser); |
6266 | break; | |
6267 | case CPP_NAME: | |
bede2adc | 6268 | switch (c_parser_peek_token (parser)->id_kind) |
27bf414c | 6269 | { |
bede2adc NP |
6270 | case C_ID_ID: |
6271 | { | |
6272 | tree id = c_parser_peek_token (parser)->value; | |
6273 | c_parser_consume_token (parser); | |
6274 | expr.value = build_external_ref (loc, id, | |
6275 | (c_parser_peek_token (parser)->type | |
6276 | == CPP_OPEN_PAREN), | |
6277 | &expr.original_type); | |
6278 | break; | |
6279 | } | |
6280 | case C_ID_CLASSNAME: | |
6281 | { | |
6282 | /* Here we parse the Objective-C 2.0 Class.name dot | |
6283 | syntax. */ | |
6284 | tree class_name = c_parser_peek_token (parser)->value; | |
6285 | tree component; | |
6286 | c_parser_consume_token (parser); | |
6287 | gcc_assert (c_dialect_objc ()); | |
6288 | if (!c_parser_require (parser, CPP_DOT, "expected %<.%>")) | |
6289 | { | |
6290 | expr.value = error_mark_node; | |
6291 | break; | |
6292 | } | |
6293 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6294 | { | |
6295 | c_parser_error (parser, "expected identifier"); | |
6296 | expr.value = error_mark_node; | |
6297 | break; | |
6298 | } | |
6299 | component = c_parser_peek_token (parser)->value; | |
6300 | c_parser_consume_token (parser); | |
6301 | expr.value = objc_build_class_component_ref (class_name, | |
6302 | component); | |
6303 | break; | |
6304 | } | |
6305 | default: | |
27bf414c JM |
6306 | c_parser_error (parser, "expected expression"); |
6307 | expr.value = error_mark_node; | |
27bf414c JM |
6308 | break; |
6309 | } | |
27bf414c JM |
6310 | break; |
6311 | case CPP_OPEN_PAREN: | |
6312 | /* A parenthesized expression, statement expression or compound | |
6313 | literal. */ | |
6314 | if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE) | |
6315 | { | |
6316 | /* A statement expression. */ | |
6317 | tree stmt; | |
c2255bc4 | 6318 | location_t brace_loc; |
27bf414c | 6319 | c_parser_consume_token (parser); |
c2255bc4 | 6320 | brace_loc = c_parser_peek_token (parser)->location; |
27bf414c | 6321 | c_parser_consume_token (parser); |
38e01f9e | 6322 | if (!building_stmt_list_p ()) |
27bf414c | 6323 | { |
c2255bc4 | 6324 | error_at (loc, "braced-group within expression allowed " |
3ba09659 | 6325 | "only inside a function"); |
27bf414c JM |
6326 | parser->error = true; |
6327 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL); | |
6328 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6329 | expr.value = error_mark_node; | |
27bf414c JM |
6330 | break; |
6331 | } | |
6332 | stmt = c_begin_stmt_expr (); | |
6333 | c_parser_compound_statement_nostart (parser); | |
6334 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6335 | "expected %<)%>"); | |
c1771a20 | 6336 | pedwarn (loc, OPT_Wpedantic, |
509c9d60 | 6337 | "ISO C forbids braced-groups within expressions"); |
c2255bc4 | 6338 | expr.value = c_finish_stmt_expr (brace_loc, stmt); |
82c3c067 | 6339 | mark_exp_read (expr.value); |
27bf414c JM |
6340 | } |
6341 | else if (c_token_starts_typename (c_parser_peek_2nd_token (parser))) | |
6342 | { | |
6343 | /* A compound literal. ??? Can we actually get here rather | |
6344 | than going directly to | |
6345 | c_parser_postfix_expression_after_paren_type from | |
6346 | elsewhere? */ | |
24b97832 | 6347 | location_t loc; |
27bf414c JM |
6348 | struct c_type_name *type_name; |
6349 | c_parser_consume_token (parser); | |
24b97832 | 6350 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6351 | type_name = c_parser_type_name (parser); |
6352 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6353 | "expected %<)%>"); | |
6354 | if (type_name == NULL) | |
6355 | { | |
6356 | expr.value = error_mark_node; | |
27bf414c JM |
6357 | } |
6358 | else | |
6359 | expr = c_parser_postfix_expression_after_paren_type (parser, | |
24b97832 ILT |
6360 | type_name, |
6361 | loc); | |
27bf414c JM |
6362 | } |
6363 | else | |
6364 | { | |
6365 | /* A parenthesized expression. */ | |
6366 | c_parser_consume_token (parser); | |
6367 | expr = c_parser_expression (parser); | |
6368 | if (TREE_CODE (expr.value) == MODIFY_EXPR) | |
6369 | TREE_NO_WARNING (expr.value) = 1; | |
928c19bb JM |
6370 | if (expr.original_code != C_MAYBE_CONST_EXPR) |
6371 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 6372 | /* Don't change EXPR.ORIGINAL_TYPE. */ |
27bf414c JM |
6373 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
6374 | "expected %<)%>"); | |
6375 | } | |
6376 | break; | |
6377 | case CPP_KEYWORD: | |
6378 | switch (c_parser_peek_token (parser)->keyword) | |
6379 | { | |
6380 | case RID_FUNCTION_NAME: | |
6381 | case RID_PRETTY_FUNCTION_NAME: | |
6382 | case RID_C99_FUNCTION_NAME: | |
c2255bc4 | 6383 | expr.value = fname_decl (loc, |
3ba09659 | 6384 | c_parser_peek_token (parser)->keyword, |
27bf414c | 6385 | c_parser_peek_token (parser)->value); |
27bf414c JM |
6386 | c_parser_consume_token (parser); |
6387 | break; | |
6388 | case RID_VA_ARG: | |
6389 | c_parser_consume_token (parser); | |
6390 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6391 | { | |
6392 | expr.value = error_mark_node; | |
27bf414c JM |
6393 | break; |
6394 | } | |
6395 | e1 = c_parser_expr_no_commas (parser, NULL); | |
ebfbbdc5 | 6396 | mark_exp_read (e1.value); |
928c19bb | 6397 | e1.value = c_fully_fold (e1.value, false, NULL); |
27bf414c JM |
6398 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
6399 | { | |
6400 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6401 | expr.value = error_mark_node; | |
27bf414c JM |
6402 | break; |
6403 | } | |
72b5577d | 6404 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6405 | t1 = c_parser_type_name (parser); |
6406 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6407 | "expected %<)%>"); | |
6408 | if (t1 == NULL) | |
6409 | { | |
6410 | expr.value = error_mark_node; | |
27bf414c JM |
6411 | } |
6412 | else | |
6413 | { | |
928c19bb | 6414 | tree type_expr = NULL_TREE; |
c2255bc4 AH |
6415 | expr.value = c_build_va_arg (loc, e1.value, |
6416 | groktypename (t1, &type_expr, NULL)); | |
928c19bb JM |
6417 | if (type_expr) |
6418 | { | |
6419 | expr.value = build2 (C_MAYBE_CONST_EXPR, | |
6420 | TREE_TYPE (expr.value), type_expr, | |
6421 | expr.value); | |
6422 | C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true; | |
6423 | } | |
27bf414c JM |
6424 | } |
6425 | break; | |
6426 | case RID_OFFSETOF: | |
6427 | c_parser_consume_token (parser); | |
6428 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6429 | { | |
6430 | expr.value = error_mark_node; | |
27bf414c JM |
6431 | break; |
6432 | } | |
6433 | t1 = c_parser_type_name (parser); | |
6434 | if (t1 == NULL) | |
29ce73cb | 6435 | parser->error = true; |
27bf414c | 6436 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) |
29ce73cb PB |
6437 | gcc_assert (parser->error); |
6438 | if (parser->error) | |
27bf414c JM |
6439 | { |
6440 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6441 | expr.value = error_mark_node; | |
27bf414c JM |
6442 | break; |
6443 | } | |
29ce73cb | 6444 | |
27bf414c | 6445 | { |
928c19bb | 6446 | tree type = groktypename (t1, NULL, NULL); |
27bf414c JM |
6447 | tree offsetof_ref; |
6448 | if (type == error_mark_node) | |
6449 | offsetof_ref = error_mark_node; | |
6450 | else | |
c2255bc4 AH |
6451 | { |
6452 | offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node); | |
6453 | SET_EXPR_LOCATION (offsetof_ref, loc); | |
6454 | } | |
27bf414c JM |
6455 | /* Parse the second argument to __builtin_offsetof. We |
6456 | must have one identifier, and beyond that we want to | |
6457 | accept sub structure and sub array references. */ | |
6458 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
6459 | { | |
6460 | offsetof_ref = build_component_ref | |
c2255bc4 | 6461 | (loc, offsetof_ref, c_parser_peek_token (parser)->value); |
27bf414c JM |
6462 | c_parser_consume_token (parser); |
6463 | while (c_parser_next_token_is (parser, CPP_DOT) | |
6464 | || c_parser_next_token_is (parser, | |
634b5df5 JJ |
6465 | CPP_OPEN_SQUARE) |
6466 | || c_parser_next_token_is (parser, | |
6467 | CPP_DEREF)) | |
27bf414c | 6468 | { |
634b5df5 JJ |
6469 | if (c_parser_next_token_is (parser, CPP_DEREF)) |
6470 | { | |
6471 | loc = c_parser_peek_token (parser)->location; | |
c2255bc4 AH |
6472 | offsetof_ref = build_array_ref (loc, |
6473 | offsetof_ref, | |
6474 | integer_zero_node); | |
634b5df5 JJ |
6475 | goto do_dot; |
6476 | } | |
6477 | else if (c_parser_next_token_is (parser, CPP_DOT)) | |
27bf414c | 6478 | { |
634b5df5 | 6479 | do_dot: |
27bf414c JM |
6480 | c_parser_consume_token (parser); |
6481 | if (c_parser_next_token_is_not (parser, | |
6482 | CPP_NAME)) | |
6483 | { | |
6484 | c_parser_error (parser, "expected identifier"); | |
6485 | break; | |
6486 | } | |
6487 | offsetof_ref = build_component_ref | |
c2255bc4 | 6488 | (loc, offsetof_ref, |
27bf414c JM |
6489 | c_parser_peek_token (parser)->value); |
6490 | c_parser_consume_token (parser); | |
6491 | } | |
6492 | else | |
6493 | { | |
6494 | tree idx; | |
6a3799eb | 6495 | loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6496 | c_parser_consume_token (parser); |
6497 | idx = c_parser_expression (parser).value; | |
928c19bb | 6498 | idx = c_fully_fold (idx, false, NULL); |
27bf414c JM |
6499 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, |
6500 | "expected %<]%>"); | |
c2255bc4 | 6501 | offsetof_ref = build_array_ref (loc, offsetof_ref, idx); |
27bf414c JM |
6502 | } |
6503 | } | |
6504 | } | |
6505 | else | |
6506 | c_parser_error (parser, "expected identifier"); | |
6507 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6508 | "expected %<)%>"); | |
cf9e9959 | 6509 | expr.value = fold_offsetof (offsetof_ref); |
27bf414c JM |
6510 | } |
6511 | break; | |
6512 | case RID_CHOOSE_EXPR: | |
27bf414c | 6513 | { |
86785830 AS |
6514 | VEC (c_expr_t, gc) *cexpr_list; |
6515 | c_expr_t *e1_p, *e2_p, *e3_p; | |
6516 | tree c; | |
27bf414c | 6517 | |
f90e8e2e AS |
6518 | c_parser_consume_token (parser); |
6519 | if (!c_parser_get_builtin_args (parser, | |
6520 | "__builtin_choose_expr", | |
86785830 | 6521 | &cexpr_list)) |
f90e8e2e AS |
6522 | { |
6523 | expr.value = error_mark_node; | |
6524 | break; | |
6525 | } | |
6526 | ||
86785830 | 6527 | if (VEC_length (c_expr_t, cexpr_list) != 3) |
f90e8e2e AS |
6528 | { |
6529 | error_at (loc, "wrong number of arguments to " | |
6530 | "%<__builtin_choose_expr%>"); | |
6531 | expr.value = error_mark_node; | |
6532 | break; | |
6533 | } | |
86785830 | 6534 | |
0823efed DN |
6535 | e1_p = &VEC_index (c_expr_t, cexpr_list, 0); |
6536 | e2_p = &VEC_index (c_expr_t, cexpr_list, 1); | |
6537 | e3_p = &VEC_index (c_expr_t, cexpr_list, 2); | |
86785830 AS |
6538 | |
6539 | c = e1_p->value; | |
6540 | mark_exp_read (e2_p->value); | |
6541 | mark_exp_read (e3_p->value); | |
928c19bb JM |
6542 | if (TREE_CODE (c) != INTEGER_CST |
6543 | || !INTEGRAL_TYPE_P (TREE_TYPE (c))) | |
3ba09659 AH |
6544 | error_at (loc, |
6545 | "first argument to %<__builtin_choose_expr%> not" | |
6546 | " a constant"); | |
928c19bb | 6547 | constant_expression_warning (c); |
86785830 | 6548 | expr = integer_zerop (c) ? *e3_p : *e2_p; |
f90e8e2e | 6549 | break; |
27bf414c | 6550 | } |
27bf414c JM |
6551 | case RID_TYPES_COMPATIBLE_P: |
6552 | c_parser_consume_token (parser); | |
6553 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6554 | { | |
6555 | expr.value = error_mark_node; | |
27bf414c JM |
6556 | break; |
6557 | } | |
6558 | t1 = c_parser_type_name (parser); | |
6559 | if (t1 == NULL) | |
6560 | { | |
6561 | expr.value = error_mark_node; | |
27bf414c JM |
6562 | break; |
6563 | } | |
6564 | if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>")) | |
6565 | { | |
6566 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6567 | expr.value = error_mark_node; | |
27bf414c JM |
6568 | break; |
6569 | } | |
6570 | t2 = c_parser_type_name (parser); | |
6571 | if (t2 == NULL) | |
6572 | { | |
6573 | expr.value = error_mark_node; | |
27bf414c JM |
6574 | break; |
6575 | } | |
6576 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6577 | "expected %<)%>"); | |
6578 | { | |
6579 | tree e1, e2; | |
9abfe986 AP |
6580 | e1 = groktypename (t1, NULL, NULL); |
6581 | e2 = groktypename (t2, NULL, NULL); | |
6582 | if (e1 == error_mark_node || e2 == error_mark_node) | |
6583 | { | |
6584 | expr.value = error_mark_node; | |
6585 | break; | |
6586 | } | |
27bf414c | 6587 | |
9abfe986 AP |
6588 | e1 = TYPE_MAIN_VARIANT (e1); |
6589 | e2 = TYPE_MAIN_VARIANT (e2); | |
27bf414c | 6590 | |
9a9d280e AS |
6591 | expr.value |
6592 | = comptypes (e1, e2) ? integer_one_node : integer_zero_node; | |
27bf414c JM |
6593 | } |
6594 | break; | |
d4a83c10 | 6595 | case RID_BUILTIN_COMPLEX: |
86785830 AS |
6596 | { |
6597 | VEC(c_expr_t, gc) *cexpr_list; | |
6598 | c_expr_t *e1_p, *e2_p; | |
6599 | ||
f90e8e2e AS |
6600 | c_parser_consume_token (parser); |
6601 | if (!c_parser_get_builtin_args (parser, | |
6602 | "__builtin_complex", | |
86785830 | 6603 | &cexpr_list)) |
f90e8e2e AS |
6604 | { |
6605 | expr.value = error_mark_node; | |
6606 | break; | |
6607 | } | |
6608 | ||
86785830 | 6609 | if (VEC_length (c_expr_t, cexpr_list) != 2) |
f90e8e2e AS |
6610 | { |
6611 | error_at (loc, "wrong number of arguments to " | |
6612 | "%<__builtin_complex%>"); | |
6613 | expr.value = error_mark_node; | |
6614 | break; | |
6615 | } | |
86785830 | 6616 | |
0823efed DN |
6617 | e1_p = &VEC_index (c_expr_t, cexpr_list, 0); |
6618 | e2_p = &VEC_index (c_expr_t, cexpr_list, 1); | |
86785830 AS |
6619 | |
6620 | mark_exp_read (e1_p->value); | |
6621 | if (TREE_CODE (e1_p->value) == EXCESS_PRECISION_EXPR) | |
6622 | e1_p->value = convert (TREE_TYPE (e1_p->value), | |
6623 | TREE_OPERAND (e1_p->value, 0)); | |
6624 | mark_exp_read (e2_p->value); | |
6625 | if (TREE_CODE (e2_p->value) == EXCESS_PRECISION_EXPR) | |
6626 | e2_p->value = convert (TREE_TYPE (e2_p->value), | |
6627 | TREE_OPERAND (e2_p->value, 0)); | |
6628 | if (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (e1_p->value)) | |
6629 | || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e1_p->value)) | |
6630 | || !SCALAR_FLOAT_TYPE_P (TREE_TYPE (e2_p->value)) | |
6631 | || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e2_p->value))) | |
f90e8e2e AS |
6632 | { |
6633 | error_at (loc, "%<__builtin_complex%> operand " | |
6634 | "not of real binary floating-point type"); | |
6635 | expr.value = error_mark_node; | |
6636 | break; | |
6637 | } | |
86785830 AS |
6638 | if (TYPE_MAIN_VARIANT (TREE_TYPE (e1_p->value)) |
6639 | != TYPE_MAIN_VARIANT (TREE_TYPE (e2_p->value))) | |
f90e8e2e AS |
6640 | { |
6641 | error_at (loc, | |
6642 | "%<__builtin_complex%> operands of different types"); | |
6643 | expr.value = error_mark_node; | |
6644 | break; | |
6645 | } | |
6646 | if (!flag_isoc99) | |
c1771a20 | 6647 | pedwarn (loc, OPT_Wpedantic, |
f90e8e2e AS |
6648 | "ISO C90 does not support complex types"); |
6649 | expr.value = build2 (COMPLEX_EXPR, | |
86785830 AS |
6650 | build_complex_type |
6651 | (TYPE_MAIN_VARIANT | |
6652 | (TREE_TYPE (e1_p->value))), | |
6653 | e1_p->value, e2_p->value); | |
f90e8e2e AS |
6654 | break; |
6655 | } | |
6656 | case RID_BUILTIN_SHUFFLE: | |
6657 | { | |
86785830 | 6658 | VEC(c_expr_t,gc) *cexpr_list; |
9243c51d JJ |
6659 | unsigned int i; |
6660 | c_expr_t *p; | |
86785830 | 6661 | |
f90e8e2e AS |
6662 | c_parser_consume_token (parser); |
6663 | if (!c_parser_get_builtin_args (parser, | |
6664 | "__builtin_shuffle", | |
86785830 | 6665 | &cexpr_list)) |
f90e8e2e AS |
6666 | { |
6667 | expr.value = error_mark_node; | |
6668 | break; | |
6669 | } | |
6670 | ||
9243c51d JJ |
6671 | FOR_EACH_VEC_ELT (c_expr_t, cexpr_list, i, p) |
6672 | mark_exp_read (p->value); | |
6673 | ||
86785830 AS |
6674 | if (VEC_length (c_expr_t, cexpr_list) == 2) |
6675 | expr.value = | |
2205ed25 | 6676 | c_build_vec_perm_expr |
0823efed DN |
6677 | (loc, VEC_index (c_expr_t, cexpr_list, 0).value, |
6678 | NULL_TREE, VEC_index (c_expr_t, cexpr_list, 1).value); | |
86785830 AS |
6679 | |
6680 | else if (VEC_length (c_expr_t, cexpr_list) == 3) | |
6681 | expr.value = | |
2205ed25 | 6682 | c_build_vec_perm_expr |
0823efed DN |
6683 | (loc, VEC_index (c_expr_t, cexpr_list, 0).value, |
6684 | VEC_index (c_expr_t, cexpr_list, 1).value, | |
6685 | VEC_index (c_expr_t, cexpr_list, 2).value); | |
f90e8e2e AS |
6686 | else |
6687 | { | |
6688 | error_at (loc, "wrong number of arguments to " | |
6689 | "%<__builtin_shuffle%>"); | |
6690 | expr.value = error_mark_node; | |
6691 | } | |
6692 | break; | |
6693 | } | |
27bf414c JM |
6694 | case RID_AT_SELECTOR: |
6695 | gcc_assert (c_dialect_objc ()); | |
6696 | c_parser_consume_token (parser); | |
6697 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6698 | { | |
6699 | expr.value = error_mark_node; | |
27bf414c JM |
6700 | break; |
6701 | } | |
6702 | { | |
6703 | tree sel = c_parser_objc_selector_arg (parser); | |
6704 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6705 | "expected %<)%>"); | |
c2255bc4 | 6706 | expr.value = objc_build_selector_expr (loc, sel); |
27bf414c JM |
6707 | } |
6708 | break; | |
6709 | case RID_AT_PROTOCOL: | |
6710 | gcc_assert (c_dialect_objc ()); | |
6711 | c_parser_consume_token (parser); | |
6712 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6713 | { | |
6714 | expr.value = error_mark_node; | |
27bf414c JM |
6715 | break; |
6716 | } | |
6717 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
6718 | { | |
6719 | c_parser_error (parser, "expected identifier"); | |
6720 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
6721 | expr.value = error_mark_node; | |
27bf414c JM |
6722 | break; |
6723 | } | |
6724 | { | |
6725 | tree id = c_parser_peek_token (parser)->value; | |
6726 | c_parser_consume_token (parser); | |
6727 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6728 | "expected %<)%>"); | |
6729 | expr.value = objc_build_protocol_expr (id); | |
27bf414c JM |
6730 | } |
6731 | break; | |
6732 | case RID_AT_ENCODE: | |
6733 | /* Extension to support C-structures in the archiver. */ | |
6734 | gcc_assert (c_dialect_objc ()); | |
6735 | c_parser_consume_token (parser); | |
6736 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
6737 | { | |
6738 | expr.value = error_mark_node; | |
27bf414c JM |
6739 | break; |
6740 | } | |
6741 | t1 = c_parser_type_name (parser); | |
6742 | if (t1 == NULL) | |
6743 | { | |
6744 | expr.value = error_mark_node; | |
27bf414c JM |
6745 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); |
6746 | break; | |
6747 | } | |
6748 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
6749 | "expected %<)%>"); | |
6750 | { | |
928c19bb | 6751 | tree type = groktypename (t1, NULL, NULL); |
27bf414c | 6752 | expr.value = objc_build_encode_expr (type); |
27bf414c JM |
6753 | } |
6754 | break; | |
6755 | default: | |
6756 | c_parser_error (parser, "expected expression"); | |
6757 | expr.value = error_mark_node; | |
27bf414c JM |
6758 | break; |
6759 | } | |
6760 | break; | |
6761 | case CPP_OPEN_SQUARE: | |
6762 | if (c_dialect_objc ()) | |
6763 | { | |
6764 | tree receiver, args; | |
6765 | c_parser_consume_token (parser); | |
6766 | receiver = c_parser_objc_receiver (parser); | |
6767 | args = c_parser_objc_message_args (parser); | |
6768 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
6769 | "expected %<]%>"); | |
eb345401 | 6770 | expr.value = objc_build_message_expr (receiver, args); |
27bf414c JM |
6771 | break; |
6772 | } | |
6773 | /* Else fall through to report error. */ | |
6774 | default: | |
6775 | c_parser_error (parser, "expected expression"); | |
6776 | expr.value = error_mark_node; | |
27bf414c JM |
6777 | break; |
6778 | } | |
c2255bc4 | 6779 | return c_parser_postfix_expression_after_primary (parser, loc, expr); |
27bf414c JM |
6780 | } |
6781 | ||
6782 | /* Parse a postfix expression after a parenthesized type name: the | |
6783 | brace-enclosed initializer of a compound literal, possibly followed | |
6784 | by some postfix operators. This is separate because it is not | |
6785 | possible to tell until after the type name whether a cast | |
6786 | expression has a cast or a compound literal, or whether the operand | |
6787 | of sizeof is a parenthesized type name or starts with a compound | |
24b97832 ILT |
6788 | literal. TYPE_LOC is the location where TYPE_NAME starts--the |
6789 | location of the first token after the parentheses around the type | |
6790 | name. */ | |
27bf414c JM |
6791 | |
6792 | static struct c_expr | |
6793 | c_parser_postfix_expression_after_paren_type (c_parser *parser, | |
24b97832 ILT |
6794 | struct c_type_name *type_name, |
6795 | location_t type_loc) | |
27bf414c JM |
6796 | { |
6797 | tree type; | |
6798 | struct c_expr init; | |
928c19bb | 6799 | bool non_const; |
27bf414c | 6800 | struct c_expr expr; |
c7412148 | 6801 | location_t start_loc; |
928c19bb JM |
6802 | tree type_expr = NULL_TREE; |
6803 | bool type_expr_const = true; | |
c2255bc4 | 6804 | check_compound_literal_type (type_loc, type_name); |
27bf414c | 6805 | start_init (NULL_TREE, NULL, 0); |
928c19bb | 6806 | type = groktypename (type_name, &type_expr, &type_expr_const); |
c7412148 | 6807 | start_loc = c_parser_peek_token (parser)->location; |
85cad37c | 6808 | if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type)) |
27bf414c | 6809 | { |
24b97832 | 6810 | error_at (type_loc, "compound literal has variable size"); |
27bf414c JM |
6811 | type = error_mark_node; |
6812 | } | |
6813 | init = c_parser_braced_init (parser, type, false); | |
6814 | finish_init (); | |
6815 | maybe_warn_string_init (type, init); | |
6816 | ||
36c5e70a BE |
6817 | if (type != error_mark_node |
6818 | && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type)) | |
6819 | && current_function_decl) | |
6820 | { | |
6821 | error ("compound literal qualified by address-space qualifier"); | |
6822 | type = error_mark_node; | |
6823 | } | |
6824 | ||
fcf73884 | 6825 | if (!flag_isoc99) |
c1771a20 | 6826 | pedwarn (start_loc, OPT_Wpedantic, "ISO C90 forbids compound literals"); |
928c19bb JM |
6827 | non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR) |
6828 | ? CONSTRUCTOR_NON_CONST (init.value) | |
6829 | : init.original_code == C_MAYBE_CONST_EXPR); | |
6830 | non_const |= !type_expr_const; | |
c2255bc4 | 6831 | expr.value = build_compound_literal (start_loc, type, init.value, non_const); |
27bf414c | 6832 | expr.original_code = ERROR_MARK; |
6866c6e8 | 6833 | expr.original_type = NULL; |
928c19bb JM |
6834 | if (type_expr) |
6835 | { | |
6836 | if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR) | |
6837 | { | |
6838 | gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE); | |
6839 | C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr; | |
6840 | } | |
6841 | else | |
6842 | { | |
6843 | gcc_assert (!non_const); | |
6844 | expr.value = build2 (C_MAYBE_CONST_EXPR, type, | |
6845 | type_expr, expr.value); | |
6846 | } | |
6847 | } | |
c2255bc4 | 6848 | return c_parser_postfix_expression_after_primary (parser, start_loc, expr); |
27bf414c JM |
6849 | } |
6850 | ||
1a4049e7 JJ |
6851 | /* Callback function for sizeof_pointer_memaccess_warning to compare |
6852 | types. */ | |
6853 | ||
6854 | static bool | |
6855 | sizeof_ptr_memacc_comptypes (tree type1, tree type2) | |
6856 | { | |
6857 | return comptypes (type1, type2) == 1; | |
6858 | } | |
6859 | ||
27bf414c | 6860 | /* Parse a postfix expression after the initial primary or compound |
c2255bc4 AH |
6861 | literal; that is, parse a series of postfix operators. |
6862 | ||
6863 | EXPR_LOC is the location of the primary expression. */ | |
27bf414c JM |
6864 | |
6865 | static struct c_expr | |
6866 | c_parser_postfix_expression_after_primary (c_parser *parser, | |
c2255bc4 | 6867 | location_t expr_loc, |
27bf414c JM |
6868 | struct c_expr expr) |
6869 | { | |
928c19bb | 6870 | struct c_expr orig_expr; |
bbbbb16a | 6871 | tree ident, idx; |
3a785c97 JJ |
6872 | location_t sizeof_arg_loc[3]; |
6873 | tree sizeof_arg[3]; | |
6874 | unsigned int i; | |
bbbbb16a ILT |
6875 | VEC(tree,gc) *exprlist; |
6876 | VEC(tree,gc) *origtypes; | |
27bf414c JM |
6877 | while (true) |
6878 | { | |
c2255bc4 | 6879 | location_t op_loc = c_parser_peek_token (parser)->location; |
27bf414c JM |
6880 | switch (c_parser_peek_token (parser)->type) |
6881 | { | |
6882 | case CPP_OPEN_SQUARE: | |
6883 | /* Array reference. */ | |
6884 | c_parser_consume_token (parser); | |
6885 | idx = c_parser_expression (parser).value; | |
6886 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, | |
6887 | "expected %<]%>"); | |
c2255bc4 | 6888 | expr.value = build_array_ref (op_loc, expr.value, idx); |
27bf414c | 6889 | expr.original_code = ERROR_MARK; |
6866c6e8 | 6890 | expr.original_type = NULL; |
27bf414c JM |
6891 | break; |
6892 | case CPP_OPEN_PAREN: | |
6893 | /* Function call. */ | |
6894 | c_parser_consume_token (parser); | |
3a785c97 JJ |
6895 | for (i = 0; i < 3; i++) |
6896 | { | |
6897 | sizeof_arg[i] = NULL_TREE; | |
6898 | sizeof_arg_loc[i] = UNKNOWN_LOCATION; | |
6899 | } | |
27bf414c | 6900 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) |
bbbbb16a | 6901 | exprlist = NULL; |
27bf414c | 6902 | else |
1a4049e7 | 6903 | exprlist = c_parser_expr_list (parser, true, false, &origtypes, |
3a785c97 | 6904 | sizeof_arg_loc, sizeof_arg); |
27bf414c JM |
6905 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, |
6906 | "expected %<)%>"); | |
928c19bb | 6907 | orig_expr = expr; |
ebfbbdc5 | 6908 | mark_exp_read (expr.value); |
3a785c97 JJ |
6909 | if (warn_sizeof_pointer_memaccess) |
6910 | sizeof_pointer_memaccess_warning (sizeof_arg_loc, | |
1a4049e7 | 6911 | expr.value, exprlist, |
3a785c97 | 6912 | sizeof_arg, |
1a4049e7 | 6913 | sizeof_ptr_memacc_comptypes); |
c2255bc4 AH |
6914 | /* FIXME diagnostics: Ideally we want the FUNCNAME, not the |
6915 | "(" after the FUNCNAME, which is what we have now. */ | |
6916 | expr.value = build_function_call_vec (op_loc, expr.value, exprlist, | |
bbbbb16a | 6917 | origtypes); |
27bf414c | 6918 | expr.original_code = ERROR_MARK; |
928c19bb JM |
6919 | if (TREE_CODE (expr.value) == INTEGER_CST |
6920 | && TREE_CODE (orig_expr.value) == FUNCTION_DECL | |
6921 | && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL | |
6922 | && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P) | |
6923 | expr.original_code = C_MAYBE_CONST_EXPR; | |
6866c6e8 | 6924 | expr.original_type = NULL; |
bbbbb16a ILT |
6925 | if (exprlist != NULL) |
6926 | { | |
c166b898 ILT |
6927 | release_tree_vector (exprlist); |
6928 | release_tree_vector (origtypes); | |
bbbbb16a | 6929 | } |
27bf414c JM |
6930 | break; |
6931 | case CPP_DOT: | |
6932 | /* Structure element reference. */ | |
6933 | c_parser_consume_token (parser); | |
c2255bc4 | 6934 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
6935 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6936 | ident = c_parser_peek_token (parser)->value; | |
6937 | else | |
6938 | { | |
6939 | c_parser_error (parser, "expected identifier"); | |
6940 | expr.value = error_mark_node; | |
6941 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 6942 | expr.original_type = NULL; |
27bf414c JM |
6943 | return expr; |
6944 | } | |
6945 | c_parser_consume_token (parser); | |
c2255bc4 | 6946 | expr.value = build_component_ref (op_loc, expr.value, ident); |
27bf414c | 6947 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
6948 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6949 | expr.original_type = NULL; | |
6950 | else | |
6951 | { | |
6952 | /* Remember the original type of a bitfield. */ | |
6953 | tree field = TREE_OPERAND (expr.value, 1); | |
6954 | if (TREE_CODE (field) != FIELD_DECL) | |
6955 | expr.original_type = NULL; | |
6956 | else | |
6957 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6958 | } | |
27bf414c JM |
6959 | break; |
6960 | case CPP_DEREF: | |
6961 | /* Structure element reference. */ | |
6962 | c_parser_consume_token (parser); | |
c2255bc4 | 6963 | expr = default_function_array_conversion (expr_loc, expr); |
27bf414c JM |
6964 | if (c_parser_next_token_is (parser, CPP_NAME)) |
6965 | ident = c_parser_peek_token (parser)->value; | |
6966 | else | |
6967 | { | |
6968 | c_parser_error (parser, "expected identifier"); | |
6969 | expr.value = error_mark_node; | |
6970 | expr.original_code = ERROR_MARK; | |
6866c6e8 | 6971 | expr.original_type = NULL; |
27bf414c JM |
6972 | return expr; |
6973 | } | |
6974 | c_parser_consume_token (parser); | |
c2255bc4 AH |
6975 | expr.value = build_component_ref (op_loc, |
6976 | build_indirect_ref (op_loc, | |
c9f9eb5d | 6977 | expr.value, |
dd865ef6 | 6978 | RO_ARROW), |
6a3799eb | 6979 | ident); |
27bf414c | 6980 | expr.original_code = ERROR_MARK; |
6866c6e8 ILT |
6981 | if (TREE_CODE (expr.value) != COMPONENT_REF) |
6982 | expr.original_type = NULL; | |
6983 | else | |
6984 | { | |
6985 | /* Remember the original type of a bitfield. */ | |
6986 | tree field = TREE_OPERAND (expr.value, 1); | |
6987 | if (TREE_CODE (field) != FIELD_DECL) | |
6988 | expr.original_type = NULL; | |
6989 | else | |
6990 | expr.original_type = DECL_BIT_FIELD_TYPE (field); | |
6991 | } | |
27bf414c JM |
6992 | break; |
6993 | case CPP_PLUS_PLUS: | |
6994 | /* Postincrement. */ | |
6995 | c_parser_consume_token (parser); | |
ebfbbdc5 | 6996 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 | 6997 | expr.value = build_unary_op (op_loc, |
c9f9eb5d | 6998 | POSTINCREMENT_EXPR, expr.value, 0); |
27bf414c | 6999 | expr.original_code = ERROR_MARK; |
6866c6e8 | 7000 | expr.original_type = NULL; |
27bf414c JM |
7001 | break; |
7002 | case CPP_MINUS_MINUS: | |
7003 | /* Postdecrement. */ | |
7004 | c_parser_consume_token (parser); | |
ebfbbdc5 | 7005 | expr = default_function_array_read_conversion (expr_loc, expr); |
c2255bc4 | 7006 | expr.value = build_unary_op (op_loc, |
c9f9eb5d | 7007 | POSTDECREMENT_EXPR, expr.value, 0); |
27bf414c | 7008 | expr.original_code = ERROR_MARK; |
6866c6e8 | 7009 | expr.original_type = NULL; |
27bf414c JM |
7010 | break; |
7011 | default: | |
7012 | return expr; | |
7013 | } | |
7014 | } | |
7015 | } | |
7016 | ||
7017 | /* Parse an expression (C90 6.3.17, C99 6.5.17). | |
7018 | ||
7019 | expression: | |
7020 | assignment-expression | |
7021 | expression , assignment-expression | |
7022 | */ | |
7023 | ||
7024 | static struct c_expr | |
7025 | c_parser_expression (c_parser *parser) | |
7026 | { | |
7027 | struct c_expr expr; | |
7028 | expr = c_parser_expr_no_commas (parser, NULL); | |
7029 | while (c_parser_next_token_is (parser, CPP_COMMA)) | |
7030 | { | |
7031 | struct c_expr next; | |
056928b2 | 7032 | tree lhsval; |
c2255bc4 AH |
7033 | location_t loc = c_parser_peek_token (parser)->location; |
7034 | location_t expr_loc; | |
27bf414c | 7035 | c_parser_consume_token (parser); |
c2255bc4 | 7036 | expr_loc = c_parser_peek_token (parser)->location; |
056928b2 JJ |
7037 | lhsval = expr.value; |
7038 | while (TREE_CODE (lhsval) == COMPOUND_EXPR) | |
7039 | lhsval = TREE_OPERAND (lhsval, 1); | |
7040 | if (DECL_P (lhsval) || handled_component_p (lhsval)) | |
7041 | mark_exp_read (lhsval); | |
27bf414c | 7042 | next = c_parser_expr_no_commas (parser, NULL); |
c2255bc4 AH |
7043 | next = default_function_array_conversion (expr_loc, next); |
7044 | expr.value = build_compound_expr (loc, expr.value, next.value); | |
27bf414c | 7045 | expr.original_code = COMPOUND_EXPR; |
81f40b79 | 7046 | expr.original_type = next.original_type; |
27bf414c JM |
7047 | } |
7048 | return expr; | |
7049 | } | |
7050 | ||
46bdb9cf JM |
7051 | /* Parse an expression and convert functions or arrays to |
7052 | pointers. */ | |
7053 | ||
7054 | static struct c_expr | |
7055 | c_parser_expression_conv (c_parser *parser) | |
7056 | { | |
7057 | struct c_expr expr; | |
c2255bc4 | 7058 | location_t loc = c_parser_peek_token (parser)->location; |
46bdb9cf | 7059 | expr = c_parser_expression (parser); |
c2255bc4 | 7060 | expr = default_function_array_conversion (loc, expr); |
46bdb9cf JM |
7061 | return expr; |
7062 | } | |
7063 | ||
7064 | /* Parse a non-empty list of expressions. If CONVERT_P, convert | |
928c19bb | 7065 | functions and arrays to pointers. If FOLD_P, fold the expressions. |
27bf414c JM |
7066 | |
7067 | nonempty-expr-list: | |
7068 | assignment-expression | |
7069 | nonempty-expr-list , assignment-expression | |
7070 | */ | |
7071 | ||
bbbbb16a ILT |
7072 | static VEC(tree,gc) * |
7073 | c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p, | |
3a785c97 JJ |
7074 | VEC(tree,gc) **p_orig_types, location_t *sizeof_arg_loc, |
7075 | tree *sizeof_arg) | |
27bf414c | 7076 | { |
bbbbb16a ILT |
7077 | VEC(tree,gc) *ret; |
7078 | VEC(tree,gc) *orig_types; | |
27bf414c | 7079 | struct c_expr expr; |
c2255bc4 | 7080 | location_t loc = c_parser_peek_token (parser)->location; |
3a785c97 JJ |
7081 | location_t cur_sizeof_arg_loc = UNKNOWN_LOCATION; |
7082 | unsigned int idx = 0; | |
bbbbb16a | 7083 | |
c166b898 | 7084 | ret = make_tree_vector (); |
bbbbb16a ILT |
7085 | if (p_orig_types == NULL) |
7086 | orig_types = NULL; | |
7087 | else | |
c166b898 | 7088 | orig_types = make_tree_vector (); |
bbbbb16a | 7089 | |
1a4049e7 JJ |
7090 | if (sizeof_arg != NULL |
7091 | && c_parser_next_token_is_keyword (parser, RID_SIZEOF)) | |
3a785c97 | 7092 | cur_sizeof_arg_loc = c_parser_peek_2nd_token (parser)->location; |
27bf414c | 7093 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 7094 | if (convert_p) |
ebfbbdc5 | 7095 | expr = default_function_array_read_conversion (loc, expr); |
928c19bb JM |
7096 | if (fold_p) |
7097 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
7098 | VEC_quick_push (tree, ret, expr.value); |
7099 | if (orig_types != NULL) | |
7100 | VEC_quick_push (tree, orig_types, expr.original_type); | |
3a785c97 JJ |
7101 | if (sizeof_arg != NULL |
7102 | && cur_sizeof_arg_loc != UNKNOWN_LOCATION | |
7103 | && expr.original_code == SIZEOF_EXPR) | |
7104 | { | |
7105 | sizeof_arg[0] = c_last_sizeof_arg; | |
7106 | sizeof_arg_loc[0] = cur_sizeof_arg_loc; | |
7107 | } | |
27bf414c JM |
7108 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
7109 | { | |
7110 | c_parser_consume_token (parser); | |
c2255bc4 | 7111 | loc = c_parser_peek_token (parser)->location; |
1a4049e7 JJ |
7112 | if (sizeof_arg != NULL |
7113 | && c_parser_next_token_is_keyword (parser, RID_SIZEOF)) | |
3a785c97 | 7114 | cur_sizeof_arg_loc = c_parser_peek_2nd_token (parser)->location; |
1a4049e7 | 7115 | else |
3a785c97 | 7116 | cur_sizeof_arg_loc = UNKNOWN_LOCATION; |
27bf414c | 7117 | expr = c_parser_expr_no_commas (parser, NULL); |
46bdb9cf | 7118 | if (convert_p) |
ebfbbdc5 | 7119 | expr = default_function_array_read_conversion (loc, expr); |
928c19bb JM |
7120 | if (fold_p) |
7121 | expr.value = c_fully_fold (expr.value, false, NULL); | |
bbbbb16a ILT |
7122 | VEC_safe_push (tree, gc, ret, expr.value); |
7123 | if (orig_types != NULL) | |
7124 | VEC_safe_push (tree, gc, orig_types, expr.original_type); | |
3a785c97 JJ |
7125 | if (++idx < 3 |
7126 | && sizeof_arg != NULL | |
7127 | && cur_sizeof_arg_loc != UNKNOWN_LOCATION | |
1a4049e7 JJ |
7128 | && expr.original_code == SIZEOF_EXPR) |
7129 | { | |
3a785c97 JJ |
7130 | sizeof_arg[idx] = c_last_sizeof_arg; |
7131 | sizeof_arg_loc[idx] = cur_sizeof_arg_loc; | |
1a4049e7 JJ |
7132 | } |
7133 | } | |
bbbbb16a ILT |
7134 | if (orig_types != NULL) |
7135 | *p_orig_types = orig_types; | |
27bf414c JM |
7136 | return ret; |
7137 | } | |
27bf414c JM |
7138 | \f |
7139 | /* Parse Objective-C-specific constructs. */ | |
7140 | ||
7141 | /* Parse an objc-class-definition. | |
7142 | ||
7143 | objc-class-definition: | |
7144 | @interface identifier objc-superclass[opt] objc-protocol-refs[opt] | |
7145 | objc-class-instance-variables[opt] objc-methodprotolist @end | |
7146 | @implementation identifier objc-superclass[opt] | |
7147 | objc-class-instance-variables[opt] | |
7148 | @interface identifier ( identifier ) objc-protocol-refs[opt] | |
7149 | objc-methodprotolist @end | |
ec3e9f82 NP |
7150 | @interface identifier ( ) objc-protocol-refs[opt] |
7151 | objc-methodprotolist @end | |
27bf414c JM |
7152 | @implementation identifier ( identifier ) |
7153 | ||
7154 | objc-superclass: | |
7155 | : identifier | |
7156 | ||
7157 | "@interface identifier (" must start "@interface identifier ( | |
7158 | identifier ) ...": objc-methodprotolist in the first production may | |
0fa2e4df | 7159 | not start with a parenthesized identifier as a declarator of a data |
27bf414c JM |
7160 | definition with no declaration specifiers if the objc-superclass, |
7161 | objc-protocol-refs and objc-class-instance-variables are omitted. */ | |
7162 | ||
7163 | static void | |
c165dca7 | 7164 | c_parser_objc_class_definition (c_parser *parser, tree attributes) |
27bf414c JM |
7165 | { |
7166 | bool iface_p; | |
7167 | tree id1; | |
7168 | tree superclass; | |
7169 | if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE)) | |
7170 | iface_p = true; | |
7171 | else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION)) | |
7172 | iface_p = false; | |
7173 | else | |
7174 | gcc_unreachable (); | |
c165dca7 | 7175 | |
27bf414c JM |
7176 | c_parser_consume_token (parser); |
7177 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7178 | { | |
7179 | c_parser_error (parser, "expected identifier"); | |
7180 | return; | |
7181 | } | |
7182 | id1 = c_parser_peek_token (parser)->value; | |
7183 | c_parser_consume_token (parser); | |
7184 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7185 | { | |
ec3e9f82 | 7186 | /* We have a category or class extension. */ |
27bf414c JM |
7187 | tree id2; |
7188 | tree proto = NULL_TREE; | |
7189 | c_parser_consume_token (parser); | |
7190 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7191 | { | |
ec3e9f82 NP |
7192 | if (iface_p && c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) |
7193 | { | |
7194 | /* We have a class extension. */ | |
7195 | id2 = NULL_TREE; | |
7196 | } | |
7197 | else | |
7198 | { | |
7199 | c_parser_error (parser, "expected identifier or %<)%>"); | |
7200 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
7201 | return; | |
7202 | } | |
7203 | } | |
7204 | else | |
7205 | { | |
7206 | id2 = c_parser_peek_token (parser)->value; | |
7207 | c_parser_consume_token (parser); | |
27bf414c | 7208 | } |
27bf414c JM |
7209 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
7210 | if (!iface_p) | |
7211 | { | |
7212 | objc_start_category_implementation (id1, id2); | |
7213 | return; | |
7214 | } | |
7215 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7216 | proto = c_parser_objc_protocol_refs (parser); | |
c165dca7 | 7217 | objc_start_category_interface (id1, id2, proto, attributes); |
27bf414c JM |
7218 | c_parser_objc_methodprotolist (parser); |
7219 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
7220 | objc_finish_interface (); | |
7221 | return; | |
7222 | } | |
7223 | if (c_parser_next_token_is (parser, CPP_COLON)) | |
7224 | { | |
7225 | c_parser_consume_token (parser); | |
7226 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7227 | { | |
7228 | c_parser_error (parser, "expected identifier"); | |
7229 | return; | |
7230 | } | |
7231 | superclass = c_parser_peek_token (parser)->value; | |
7232 | c_parser_consume_token (parser); | |
7233 | } | |
7234 | else | |
7235 | superclass = NULL_TREE; | |
7236 | if (iface_p) | |
7237 | { | |
7238 | tree proto = NULL_TREE; | |
7239 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7240 | proto = c_parser_objc_protocol_refs (parser); | |
c165dca7 | 7241 | objc_start_class_interface (id1, superclass, proto, attributes); |
27bf414c JM |
7242 | } |
7243 | else | |
7244 | objc_start_class_implementation (id1, superclass); | |
7245 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
7246 | c_parser_objc_class_instance_variables (parser); | |
7247 | if (iface_p) | |
7248 | { | |
7249 | objc_continue_interface (); | |
7250 | c_parser_objc_methodprotolist (parser); | |
7251 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
7252 | objc_finish_interface (); | |
7253 | } | |
7254 | else | |
7255 | { | |
7256 | objc_continue_implementation (); | |
7257 | return; | |
7258 | } | |
7259 | } | |
7260 | ||
7261 | /* Parse objc-class-instance-variables. | |
7262 | ||
7263 | objc-class-instance-variables: | |
7264 | { objc-instance-variable-decl-list[opt] } | |
7265 | ||
7266 | objc-instance-variable-decl-list: | |
7267 | objc-visibility-spec | |
7268 | objc-instance-variable-decl ; | |
7269 | ; | |
7270 | objc-instance-variable-decl-list objc-visibility-spec | |
7271 | objc-instance-variable-decl-list objc-instance-variable-decl ; | |
7272 | objc-instance-variable-decl-list ; | |
7273 | ||
7274 | objc-visibility-spec: | |
7275 | @private | |
7276 | @protected | |
7277 | @public | |
7278 | ||
7279 | objc-instance-variable-decl: | |
7280 | struct-declaration | |
7281 | */ | |
7282 | ||
7283 | static void | |
7284 | c_parser_objc_class_instance_variables (c_parser *parser) | |
7285 | { | |
7286 | gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE)); | |
7287 | c_parser_consume_token (parser); | |
7288 | while (c_parser_next_token_is_not (parser, CPP_EOF)) | |
7289 | { | |
7290 | tree decls; | |
7291 | /* Parse any stray semicolon. */ | |
7292 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7293 | { | |
c1771a20 | 7294 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
4e26ba90 | 7295 | "extra semicolon"); |
27bf414c JM |
7296 | c_parser_consume_token (parser); |
7297 | continue; | |
7298 | } | |
7299 | /* Stop if at the end of the instance variables. */ | |
7300 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
7301 | { | |
7302 | c_parser_consume_token (parser); | |
7303 | break; | |
7304 | } | |
7305 | /* Parse any objc-visibility-spec. */ | |
49b91f05 | 7306 | if (c_parser_next_token_is_keyword (parser, RID_AT_PRIVATE)) |
27bf414c JM |
7307 | { |
7308 | c_parser_consume_token (parser); | |
c37d8c30 | 7309 | objc_set_visibility (OBJC_IVAR_VIS_PRIVATE); |
27bf414c JM |
7310 | continue; |
7311 | } | |
49b91f05 | 7312 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PROTECTED)) |
27bf414c JM |
7313 | { |
7314 | c_parser_consume_token (parser); | |
c37d8c30 | 7315 | objc_set_visibility (OBJC_IVAR_VIS_PROTECTED); |
27bf414c JM |
7316 | continue; |
7317 | } | |
49b91f05 | 7318 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PUBLIC)) |
27bf414c JM |
7319 | { |
7320 | c_parser_consume_token (parser); | |
c37d8c30 IS |
7321 | objc_set_visibility (OBJC_IVAR_VIS_PUBLIC); |
7322 | continue; | |
7323 | } | |
7324 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PACKAGE)) | |
7325 | { | |
7326 | c_parser_consume_token (parser); | |
7327 | objc_set_visibility (OBJC_IVAR_VIS_PACKAGE); | |
27bf414c JM |
7328 | continue; |
7329 | } | |
bc4071dd RH |
7330 | else if (c_parser_next_token_is (parser, CPP_PRAGMA)) |
7331 | { | |
7332 | c_parser_pragma (parser, pragma_external); | |
7333 | continue; | |
7334 | } | |
7335 | ||
27bf414c JM |
7336 | /* Parse some comma-separated declarations. */ |
7337 | decls = c_parser_struct_declaration (parser); | |
4e26ba90 NP |
7338 | if (decls == NULL) |
7339 | { | |
7340 | /* There is a syntax error. We want to skip the offending | |
7341 | tokens up to the next ';' (included) or '}' | |
7342 | (excluded). */ | |
7343 | ||
7344 | /* First, skip manually a ')' or ']'. This is because they | |
7345 | reduce the nesting level, so c_parser_skip_until_found() | |
7346 | wouldn't be able to skip past them. */ | |
7347 | c_token *token = c_parser_peek_token (parser); | |
7348 | if (token->type == CPP_CLOSE_PAREN || token->type == CPP_CLOSE_SQUARE) | |
7349 | c_parser_consume_token (parser); | |
7350 | ||
7351 | /* Then, do the standard skipping. */ | |
7352 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7353 | ||
7354 | /* We hopefully recovered. Start normal parsing again. */ | |
7355 | parser->error = false; | |
7356 | continue; | |
7357 | } | |
7358 | else | |
7359 | { | |
7360 | /* Comma-separated instance variables are chained together | |
7361 | in reverse order; add them one by one. */ | |
7362 | tree ivar = nreverse (decls); | |
7363 | for (; ivar; ivar = DECL_CHAIN (ivar)) | |
7364 | objc_add_instance_variable (copy_node (ivar)); | |
7365 | } | |
27bf414c JM |
7366 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7367 | } | |
7368 | } | |
7369 | ||
7370 | /* Parse an objc-class-declaration. | |
7371 | ||
7372 | objc-class-declaration: | |
7373 | @class identifier-list ; | |
7374 | */ | |
7375 | ||
7376 | static void | |
7377 | c_parser_objc_class_declaration (c_parser *parser) | |
7378 | { | |
49b91f05 | 7379 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_CLASS)); |
27bf414c JM |
7380 | c_parser_consume_token (parser); |
7381 | /* Any identifiers, including those declared as type names, are OK | |
7382 | here. */ | |
7383 | while (true) | |
7384 | { | |
7385 | tree id; | |
7386 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7387 | { | |
7388 | c_parser_error (parser, "expected identifier"); | |
da57d1b9 NP |
7389 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); |
7390 | parser->error = false; | |
7391 | return; | |
27bf414c JM |
7392 | } |
7393 | id = c_parser_peek_token (parser)->value; | |
32dabdaf | 7394 | objc_declare_class (id); |
27bf414c JM |
7395 | c_parser_consume_token (parser); |
7396 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7397 | c_parser_consume_token (parser); | |
7398 | else | |
7399 | break; | |
7400 | } | |
7401 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
27bf414c JM |
7402 | } |
7403 | ||
7404 | /* Parse an objc-alias-declaration. | |
7405 | ||
7406 | objc-alias-declaration: | |
7407 | @compatibility_alias identifier identifier ; | |
7408 | */ | |
7409 | ||
7410 | static void | |
7411 | c_parser_objc_alias_declaration (c_parser *parser) | |
7412 | { | |
7413 | tree id1, id2; | |
7414 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS)); | |
7415 | c_parser_consume_token (parser); | |
7416 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7417 | { | |
7418 | c_parser_error (parser, "expected identifier"); | |
7419 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7420 | return; | |
7421 | } | |
7422 | id1 = c_parser_peek_token (parser)->value; | |
7423 | c_parser_consume_token (parser); | |
7424 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7425 | { | |
7426 | c_parser_error (parser, "expected identifier"); | |
7427 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
7428 | return; | |
7429 | } | |
7430 | id2 = c_parser_peek_token (parser)->value; | |
7431 | c_parser_consume_token (parser); | |
7432 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
7433 | objc_declare_alias (id1, id2); | |
7434 | } | |
7435 | ||
7436 | /* Parse an objc-protocol-definition. | |
7437 | ||
7438 | objc-protocol-definition: | |
7439 | @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end | |
7440 | @protocol identifier-list ; | |
7441 | ||
7442 | "@protocol identifier ;" should be resolved as "@protocol | |
7443 | identifier-list ;": objc-methodprotolist may not start with a | |
7444 | semicolon in the first alternative if objc-protocol-refs are | |
7445 | omitted. */ | |
7446 | ||
7447 | static void | |
c165dca7 | 7448 | c_parser_objc_protocol_definition (c_parser *parser, tree attributes) |
27bf414c JM |
7449 | { |
7450 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL)); | |
c165dca7 | 7451 | |
27bf414c JM |
7452 | c_parser_consume_token (parser); |
7453 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7454 | { | |
7455 | c_parser_error (parser, "expected identifier"); | |
7456 | return; | |
7457 | } | |
7458 | if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA | |
7459 | || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON) | |
7460 | { | |
27bf414c JM |
7461 | /* Any identifiers, including those declared as type names, are |
7462 | OK here. */ | |
7463 | while (true) | |
7464 | { | |
7465 | tree id; | |
7466 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7467 | { | |
7468 | c_parser_error (parser, "expected identifier"); | |
7469 | break; | |
7470 | } | |
7471 | id = c_parser_peek_token (parser)->value; | |
c59633d9 | 7472 | objc_declare_protocol (id, attributes); |
27bf414c JM |
7473 | c_parser_consume_token (parser); |
7474 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7475 | c_parser_consume_token (parser); | |
7476 | else | |
7477 | break; | |
7478 | } | |
7479 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
27bf414c JM |
7480 | } |
7481 | else | |
7482 | { | |
7483 | tree id = c_parser_peek_token (parser)->value; | |
7484 | tree proto = NULL_TREE; | |
7485 | c_parser_consume_token (parser); | |
7486 | if (c_parser_next_token_is (parser, CPP_LESS)) | |
7487 | proto = c_parser_objc_protocol_refs (parser); | |
0bacb8c7 | 7488 | parser->objc_pq_context = true; |
c165dca7 | 7489 | objc_start_protocol (id, proto, attributes); |
27bf414c JM |
7490 | c_parser_objc_methodprotolist (parser); |
7491 | c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>"); | |
0bacb8c7 | 7492 | parser->objc_pq_context = false; |
27bf414c JM |
7493 | objc_finish_interface (); |
7494 | } | |
7495 | } | |
7496 | ||
7497 | /* Parse an objc-method-type. | |
7498 | ||
7499 | objc-method-type: | |
7500 | + | |
7501 | - | |
27bf414c | 7502 | |
249a82c4 NP |
7503 | Return true if it is a class method (+) and false if it is |
7504 | an instance method (-). | |
7505 | */ | |
7506 | static inline bool | |
27bf414c JM |
7507 | c_parser_objc_method_type (c_parser *parser) |
7508 | { | |
7509 | switch (c_parser_peek_token (parser)->type) | |
7510 | { | |
7511 | case CPP_PLUS: | |
7512 | c_parser_consume_token (parser); | |
249a82c4 | 7513 | return true; |
27bf414c JM |
7514 | case CPP_MINUS: |
7515 | c_parser_consume_token (parser); | |
249a82c4 | 7516 | return false; |
27bf414c JM |
7517 | default: |
7518 | gcc_unreachable (); | |
7519 | } | |
7520 | } | |
7521 | ||
7522 | /* Parse an objc-method-definition. | |
7523 | ||
7524 | objc-method-definition: | |
7525 | objc-method-type objc-method-decl ;[opt] compound-statement | |
7526 | */ | |
7527 | ||
7528 | static void | |
7529 | c_parser_objc_method_definition (c_parser *parser) | |
7530 | { | |
249a82c4 | 7531 | bool is_class_method = c_parser_objc_method_type (parser); |
a04a722b | 7532 | tree decl, attributes = NULL_TREE, expr = NULL_TREE; |
0bacb8c7 | 7533 | parser->objc_pq_context = true; |
a04a722b JM |
7534 | decl = c_parser_objc_method_decl (parser, is_class_method, &attributes, |
7535 | &expr); | |
f7e71da5 IS |
7536 | if (decl == error_mark_node) |
7537 | return; /* Bail here. */ | |
7538 | ||
27bf414c JM |
7539 | if (c_parser_next_token_is (parser, CPP_SEMICOLON)) |
7540 | { | |
7541 | c_parser_consume_token (parser); | |
c1771a20 | 7542 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 7543 | "extra semicolon in method definition specified"); |
27bf414c | 7544 | } |
f7e71da5 | 7545 | |
8f078c08 AP |
7546 | if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE)) |
7547 | { | |
7548 | c_parser_error (parser, "expected %<{%>"); | |
7549 | return; | |
7550 | } | |
f7e71da5 | 7551 | |
0bacb8c7 | 7552 | parser->objc_pq_context = false; |
a04a722b | 7553 | if (objc_start_method_definition (is_class_method, decl, attributes, expr)) |
45547c7f NP |
7554 | { |
7555 | add_stmt (c_parser_compound_statement (parser)); | |
7556 | objc_finish_method_definition (current_function_decl); | |
7557 | } | |
7558 | else | |
7559 | { | |
7560 | /* This code is executed when we find a method definition | |
a26d8862 NP |
7561 | outside of an @implementation context (or invalid for other |
7562 | reasons). Parse the method (to keep going) but do not emit | |
7563 | any code. | |
45547c7f NP |
7564 | */ |
7565 | c_parser_compound_statement (parser); | |
7566 | } | |
27bf414c JM |
7567 | } |
7568 | ||
7569 | /* Parse an objc-methodprotolist. | |
7570 | ||
7571 | objc-methodprotolist: | |
7572 | empty | |
7573 | objc-methodprotolist objc-methodproto | |
7574 | objc-methodprotolist declaration | |
7575 | objc-methodprotolist ; | |
92902b1b IS |
7576 | @optional |
7577 | @required | |
27bf414c JM |
7578 | |
7579 | The declaration is a data definition, which may be missing | |
7580 | declaration specifiers under the same rules and diagnostics as | |
7581 | other data definitions outside functions, and the stray semicolon | |
7582 | is diagnosed the same way as a stray semicolon outside a | |
7583 | function. */ | |
7584 | ||
7585 | static void | |
7586 | c_parser_objc_methodprotolist (c_parser *parser) | |
7587 | { | |
7588 | while (true) | |
7589 | { | |
7590 | /* The list is terminated by @end. */ | |
7591 | switch (c_parser_peek_token (parser)->type) | |
7592 | { | |
7593 | case CPP_SEMICOLON: | |
c1771a20 | 7594 | pedwarn (c_parser_peek_token (parser)->location, OPT_Wpedantic, |
509c9d60 | 7595 | "ISO C does not allow extra %<;%> outside of a function"); |
27bf414c JM |
7596 | c_parser_consume_token (parser); |
7597 | break; | |
7598 | case CPP_PLUS: | |
7599 | case CPP_MINUS: | |
7600 | c_parser_objc_methodproto (parser); | |
7601 | break; | |
b9b58168 RH |
7602 | case CPP_PRAGMA: |
7603 | c_parser_pragma (parser, pragma_external); | |
7604 | break; | |
27bf414c JM |
7605 | case CPP_EOF: |
7606 | return; | |
7607 | default: | |
7608 | if (c_parser_next_token_is_keyword (parser, RID_AT_END)) | |
7609 | return; | |
668ea4b1 | 7610 | else if (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY)) |
f614132b | 7611 | c_parser_objc_at_property_declaration (parser); |
92902b1b IS |
7612 | else if (c_parser_next_token_is_keyword (parser, RID_AT_OPTIONAL)) |
7613 | { | |
7614 | objc_set_method_opt (true); | |
7615 | c_parser_consume_token (parser); | |
7616 | } | |
7617 | else if (c_parser_next_token_is_keyword (parser, RID_AT_REQUIRED)) | |
7618 | { | |
7619 | objc_set_method_opt (false); | |
7620 | c_parser_consume_token (parser); | |
7621 | } | |
7622 | else | |
7623 | c_parser_declaration_or_fndef (parser, false, false, true, | |
f05b9d93 | 7624 | false, true, NULL); |
27bf414c JM |
7625 | break; |
7626 | } | |
7627 | } | |
7628 | } | |
7629 | ||
7630 | /* Parse an objc-methodproto. | |
7631 | ||
7632 | objc-methodproto: | |
7633 | objc-method-type objc-method-decl ; | |
7634 | */ | |
7635 | ||
7636 | static void | |
7637 | c_parser_objc_methodproto (c_parser *parser) | |
7638 | { | |
249a82c4 | 7639 | bool is_class_method = c_parser_objc_method_type (parser); |
f7e71da5 | 7640 | tree decl, attributes = NULL_TREE; |
249a82c4 | 7641 | |
27bf414c | 7642 | /* Remember protocol qualifiers in prototypes. */ |
0bacb8c7 | 7643 | parser->objc_pq_context = true; |
a04a722b JM |
7644 | decl = c_parser_objc_method_decl (parser, is_class_method, &attributes, |
7645 | NULL); | |
f7e71da5 | 7646 | /* Forget protocol qualifiers now. */ |
0bacb8c7 | 7647 | parser->objc_pq_context = false; |
f7e71da5 IS |
7648 | |
7649 | /* Do not allow the presence of attributes to hide an erroneous | |
7650 | method implementation in the interface section. */ | |
7651 | if (!c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
7652 | { | |
7653 | c_parser_error (parser, "expected %<;%>"); | |
7654 | return; | |
7655 | } | |
7656 | ||
7657 | if (decl != error_mark_node) | |
249a82c4 | 7658 | objc_add_method_declaration (is_class_method, decl, attributes); |
f7e71da5 | 7659 | |
27bf414c JM |
7660 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
7661 | } | |
7662 | ||
f7e71da5 IS |
7663 | /* If we are at a position that method attributes may be present, check that |
7664 | there are not any parsed already (a syntax error) and then collect any | |
7665 | specified at the current location. Finally, if new attributes were present, | |
7666 | check that the next token is legal ( ';' for decls and '{' for defs). */ | |
7667 | ||
7668 | static bool | |
7669 | c_parser_objc_maybe_method_attributes (c_parser* parser, tree* attributes) | |
7670 | { | |
7671 | bool bad = false; | |
7672 | if (*attributes) | |
7673 | { | |
7674 | c_parser_error (parser, | |
7675 | "method attributes must be specified at the end only"); | |
7676 | *attributes = NULL_TREE; | |
7677 | bad = true; | |
7678 | } | |
7679 | ||
7680 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
7681 | *attributes = c_parser_attributes (parser); | |
7682 | ||
7683 | /* If there were no attributes here, just report any earlier error. */ | |
7684 | if (*attributes == NULL_TREE || bad) | |
7685 | return bad; | |
7686 | ||
7687 | /* If the attributes are followed by a ; or {, then just report any earlier | |
7688 | error. */ | |
7689 | if (c_parser_next_token_is (parser, CPP_SEMICOLON) | |
7690 | || c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
7691 | return bad; | |
7692 | ||
7693 | /* We've got attributes, but not at the end. */ | |
7694 | c_parser_error (parser, | |
7695 | "expected %<;%> or %<{%> after method attribute definition"); | |
7696 | return true; | |
7697 | } | |
7698 | ||
27bf414c JM |
7699 | /* Parse an objc-method-decl. |
7700 | ||
7701 | objc-method-decl: | |
7702 | ( objc-type-name ) objc-selector | |
7703 | objc-selector | |
7704 | ( objc-type-name ) objc-keyword-selector objc-optparmlist | |
7705 | objc-keyword-selector objc-optparmlist | |
f7e71da5 | 7706 | attributes |
27bf414c JM |
7707 | |
7708 | objc-keyword-selector: | |
7709 | objc-keyword-decl | |
7710 | objc-keyword-selector objc-keyword-decl | |
7711 | ||
7712 | objc-keyword-decl: | |
7713 | objc-selector : ( objc-type-name ) identifier | |
7714 | objc-selector : identifier | |
7715 | : ( objc-type-name ) identifier | |
7716 | : identifier | |
7717 | ||
7718 | objc-optparmlist: | |
7719 | objc-optparms objc-optellipsis | |
7720 | ||
7721 | objc-optparms: | |
7722 | empty | |
7723 | objc-opt-parms , parameter-declaration | |
7724 | ||
7725 | objc-optellipsis: | |
7726 | empty | |
7727 | , ... | |
7728 | */ | |
7729 | ||
7730 | static tree | |
a04a722b JM |
7731 | c_parser_objc_method_decl (c_parser *parser, bool is_class_method, |
7732 | tree *attributes, tree *expr) | |
27bf414c JM |
7733 | { |
7734 | tree type = NULL_TREE; | |
7735 | tree sel; | |
7736 | tree parms = NULL_TREE; | |
dbb74365 | 7737 | bool ellipsis = false; |
f7e71da5 | 7738 | bool attr_err = false; |
dbb74365 | 7739 | |
f7e71da5 | 7740 | *attributes = NULL_TREE; |
27bf414c JM |
7741 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
7742 | { | |
7743 | c_parser_consume_token (parser); | |
7744 | type = c_parser_objc_type_name (parser); | |
7745 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7746 | } | |
7747 | sel = c_parser_objc_selector (parser); | |
7748 | /* If there is no selector, or a colon follows, we have an | |
7749 | objc-keyword-selector. If there is a selector, and a colon does | |
7750 | not follow, that selector ends the objc-method-decl. */ | |
7751 | if (!sel || c_parser_next_token_is (parser, CPP_COLON)) | |
7752 | { | |
7753 | tree tsel = sel; | |
7754 | tree list = NULL_TREE; | |
27bf414c JM |
7755 | while (true) |
7756 | { | |
7757 | tree atype = NULL_TREE, id, keyworddecl; | |
f7e71da5 | 7758 | tree param_attr = NULL_TREE; |
27bf414c JM |
7759 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) |
7760 | break; | |
7761 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
7762 | { | |
7763 | c_parser_consume_token (parser); | |
7764 | atype = c_parser_objc_type_name (parser); | |
7765 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
7766 | "expected %<)%>"); | |
7767 | } | |
f7e71da5 IS |
7768 | /* New ObjC allows attributes on method parameters. */ |
7769 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
7770 | param_attr = c_parser_attributes (parser); | |
27bf414c JM |
7771 | if (c_parser_next_token_is_not (parser, CPP_NAME)) |
7772 | { | |
7773 | c_parser_error (parser, "expected identifier"); | |
7774 | return error_mark_node; | |
7775 | } | |
7776 | id = c_parser_peek_token (parser)->value; | |
7777 | c_parser_consume_token (parser); | |
f7e71da5 | 7778 | keyworddecl = objc_build_keyword_decl (tsel, atype, id, param_attr); |
27bf414c JM |
7779 | list = chainon (list, keyworddecl); |
7780 | tsel = c_parser_objc_selector (parser); | |
7781 | if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
7782 | break; | |
7783 | } | |
f7e71da5 IS |
7784 | |
7785 | attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ; | |
7786 | ||
27bf414c JM |
7787 | /* Parse the optional parameter list. Optional Objective-C |
7788 | method parameters follow the C syntax, and may include '...' | |
7789 | to denote a variable number of arguments. */ | |
7790 | parms = make_node (TREE_LIST); | |
27bf414c JM |
7791 | while (c_parser_next_token_is (parser, CPP_COMMA)) |
7792 | { | |
7793 | struct c_parm *parm; | |
7794 | c_parser_consume_token (parser); | |
7795 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
7796 | { | |
7797 | ellipsis = true; | |
7798 | c_parser_consume_token (parser); | |
f7e71da5 IS |
7799 | attr_err |= c_parser_objc_maybe_method_attributes |
7800 | (parser, attributes) ; | |
27bf414c JM |
7801 | break; |
7802 | } | |
7803 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
7804 | if (parm == NULL) | |
7805 | break; | |
7806 | parms = chainon (parms, | |
a04a722b | 7807 | build_tree_list (NULL_TREE, grokparm (parm, expr))); |
27bf414c | 7808 | } |
27bf414c JM |
7809 | sel = list; |
7810 | } | |
f7e71da5 IS |
7811 | else |
7812 | attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ; | |
7813 | ||
7814 | if (sel == NULL) | |
7815 | { | |
7816 | c_parser_error (parser, "objective-c method declaration is expected"); | |
7817 | return error_mark_node; | |
7818 | } | |
7819 | ||
7820 | if (attr_err) | |
7821 | return error_mark_node; | |
7822 | ||
249a82c4 | 7823 | return objc_build_method_signature (is_class_method, type, sel, parms, ellipsis); |
27bf414c JM |
7824 | } |
7825 | ||
7826 | /* Parse an objc-type-name. | |
7827 | ||
7828 | objc-type-name: | |
7829 | objc-type-qualifiers[opt] type-name | |
7830 | objc-type-qualifiers[opt] | |
7831 | ||
7832 | objc-type-qualifiers: | |
7833 | objc-type-qualifier | |
7834 | objc-type-qualifiers objc-type-qualifier | |
7835 | ||
7836 | objc-type-qualifier: one of | |
7837 | in out inout bycopy byref oneway | |
7838 | */ | |
7839 | ||
7840 | static tree | |
7841 | c_parser_objc_type_name (c_parser *parser) | |
7842 | { | |
7843 | tree quals = NULL_TREE; | |
d75d71e0 | 7844 | struct c_type_name *type_name = NULL; |
27bf414c JM |
7845 | tree type = NULL_TREE; |
7846 | while (true) | |
7847 | { | |
7848 | c_token *token = c_parser_peek_token (parser); | |
7849 | if (token->type == CPP_KEYWORD | |
7850 | && (token->keyword == RID_IN | |
7851 | || token->keyword == RID_OUT | |
7852 | || token->keyword == RID_INOUT | |
7853 | || token->keyword == RID_BYCOPY | |
7854 | || token->keyword == RID_BYREF | |
7855 | || token->keyword == RID_ONEWAY)) | |
7856 | { | |
71fc71d8 | 7857 | quals = chainon (build_tree_list (NULL_TREE, token->value), quals); |
27bf414c JM |
7858 | c_parser_consume_token (parser); |
7859 | } | |
7860 | else | |
7861 | break; | |
7862 | } | |
29ce73cb | 7863 | if (c_parser_next_tokens_start_typename (parser, cla_prefer_type)) |
d75d71e0 ILT |
7864 | type_name = c_parser_type_name (parser); |
7865 | if (type_name) | |
928c19bb | 7866 | type = groktypename (type_name, NULL, NULL); |
046608a3 NP |
7867 | |
7868 | /* If the type is unknown, and error has already been produced and | |
7869 | we need to recover from the error. In that case, use NULL_TREE | |
7870 | for the type, as if no type had been specified; this will use the | |
7871 | default type ('id') which is good for error recovery. */ | |
7872 | if (type == error_mark_node) | |
7873 | type = NULL_TREE; | |
7874 | ||
27bf414c JM |
7875 | return build_tree_list (quals, type); |
7876 | } | |
7877 | ||
7878 | /* Parse objc-protocol-refs. | |
7879 | ||
7880 | objc-protocol-refs: | |
7881 | < identifier-list > | |
7882 | */ | |
7883 | ||
7884 | static tree | |
7885 | c_parser_objc_protocol_refs (c_parser *parser) | |
7886 | { | |
7887 | tree list = NULL_TREE; | |
7888 | gcc_assert (c_parser_next_token_is (parser, CPP_LESS)); | |
7889 | c_parser_consume_token (parser); | |
7890 | /* Any identifiers, including those declared as type names, are OK | |
7891 | here. */ | |
7892 | while (true) | |
7893 | { | |
7894 | tree id; | |
7895 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
7896 | { | |
7897 | c_parser_error (parser, "expected identifier"); | |
7898 | break; | |
7899 | } | |
7900 | id = c_parser_peek_token (parser)->value; | |
7901 | list = chainon (list, build_tree_list (NULL_TREE, id)); | |
7902 | c_parser_consume_token (parser); | |
7903 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
7904 | c_parser_consume_token (parser); | |
7905 | else | |
7906 | break; | |
7907 | } | |
7908 | c_parser_require (parser, CPP_GREATER, "expected %<>%>"); | |
7909 | return list; | |
7910 | } | |
7911 | ||
437c2322 | 7912 | /* Parse an objc-try-catch-finally-statement. |
27bf414c | 7913 | |
437c2322 | 7914 | objc-try-catch-finally-statement: |
27bf414c JM |
7915 | @try compound-statement objc-catch-list[opt] |
7916 | @try compound-statement objc-catch-list[opt] @finally compound-statement | |
7917 | ||
7918 | objc-catch-list: | |
437c2322 NP |
7919 | @catch ( objc-catch-parameter-declaration ) compound-statement |
7920 | objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement | |
7921 | ||
7922 | objc-catch-parameter-declaration: | |
7923 | parameter-declaration | |
7924 | '...' | |
7925 | ||
7926 | where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS. | |
7927 | ||
7928 | PS: This function is identical to cp_parser_objc_try_catch_finally_statement | |
7929 | for C++. Keep them in sync. */ | |
27bf414c JM |
7930 | |
7931 | static void | |
437c2322 | 7932 | c_parser_objc_try_catch_finally_statement (c_parser *parser) |
27bf414c | 7933 | { |
437c2322 | 7934 | location_t location; |
27bf414c | 7935 | tree stmt; |
437c2322 | 7936 | |
49b91f05 | 7937 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY)); |
27bf414c | 7938 | c_parser_consume_token (parser); |
437c2322 | 7939 | location = c_parser_peek_token (parser)->location; |
46270f14 | 7940 | objc_maybe_warn_exceptions (location); |
27bf414c | 7941 | stmt = c_parser_compound_statement (parser); |
437c2322 NP |
7942 | objc_begin_try_stmt (location, stmt); |
7943 | ||
49b91f05 | 7944 | while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH)) |
27bf414c JM |
7945 | { |
7946 | struct c_parm *parm; | |
437c2322 NP |
7947 | tree parameter_declaration = error_mark_node; |
7948 | bool seen_open_paren = false; | |
7949 | ||
27bf414c JM |
7950 | c_parser_consume_token (parser); |
7951 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
437c2322 NP |
7952 | seen_open_paren = true; |
7953 | if (c_parser_next_token_is (parser, CPP_ELLIPSIS)) | |
27bf414c | 7954 | { |
437c2322 NP |
7955 | /* We have "@catch (...)" (where the '...' are literally |
7956 | what is in the code). Skip the '...'. | |
7957 | parameter_declaration is set to NULL_TREE, and | |
7958 | objc_being_catch_clauses() knows that that means | |
7959 | '...'. */ | |
7960 | c_parser_consume_token (parser); | |
7961 | parameter_declaration = NULL_TREE; | |
27bf414c | 7962 | } |
437c2322 NP |
7963 | else |
7964 | { | |
7965 | /* We have "@catch (NSException *exception)" or something | |
7966 | like that. Parse the parameter declaration. */ | |
7967 | parm = c_parser_parameter_declaration (parser, NULL_TREE); | |
7968 | if (parm == NULL) | |
7969 | parameter_declaration = error_mark_node; | |
7970 | else | |
a04a722b | 7971 | parameter_declaration = grokparm (parm, NULL); |
437c2322 NP |
7972 | } |
7973 | if (seen_open_paren) | |
7974 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
7975 | else | |
7976 | { | |
7977 | /* If there was no open parenthesis, we are recovering from | |
7978 | an error, and we are trying to figure out what mistake | |
7979 | the user has made. */ | |
7980 | ||
7981 | /* If there is an immediate closing parenthesis, the user | |
7982 | probably forgot the opening one (ie, they typed "@catch | |
7983 | NSException *e)". Parse the closing parenthesis and keep | |
7984 | going. */ | |
7985 | if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN)) | |
7986 | c_parser_consume_token (parser); | |
7987 | ||
7988 | /* If these is no immediate closing parenthesis, the user | |
7989 | probably doesn't know that parenthesis are required at | |
7990 | all (ie, they typed "@catch NSException *e"). So, just | |
7991 | forget about the closing parenthesis and keep going. */ | |
7992 | } | |
7993 | objc_begin_catch_clause (parameter_declaration); | |
27bf414c JM |
7994 | if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
7995 | c_parser_compound_statement_nostart (parser); | |
7996 | objc_finish_catch_clause (); | |
7997 | } | |
7998 | if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY)) | |
7999 | { | |
27bf414c | 8000 | c_parser_consume_token (parser); |
437c2322 NP |
8001 | location = c_parser_peek_token (parser)->location; |
8002 | stmt = c_parser_compound_statement (parser); | |
8003 | objc_build_finally_clause (location, stmt); | |
27bf414c JM |
8004 | } |
8005 | objc_finish_try_stmt (); | |
8006 | } | |
8007 | ||
8008 | /* Parse an objc-synchronized-statement. | |
8009 | ||
8010 | objc-synchronized-statement: | |
8011 | @synchronized ( expression ) compound-statement | |
8012 | */ | |
8013 | ||
8014 | static void | |
8015 | c_parser_objc_synchronized_statement (c_parser *parser) | |
8016 | { | |
8017 | location_t loc; | |
8018 | tree expr, stmt; | |
8019 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED)); | |
8020 | c_parser_consume_token (parser); | |
8021 | loc = c_parser_peek_token (parser)->location; | |
46270f14 | 8022 | objc_maybe_warn_exceptions (loc); |
27bf414c JM |
8023 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
8024 | { | |
8025 | expr = c_parser_expression (parser).value; | |
928c19bb | 8026 | expr = c_fully_fold (expr, false, NULL); |
27bf414c JM |
8027 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
8028 | } | |
8029 | else | |
8030 | expr = error_mark_node; | |
8031 | stmt = c_parser_compound_statement (parser); | |
8032 | objc_build_synchronized (loc, expr, stmt); | |
8033 | } | |
8034 | ||
8035 | /* Parse an objc-selector; return NULL_TREE without an error if the | |
8036 | next token is not an objc-selector. | |
8037 | ||
8038 | objc-selector: | |
8039 | identifier | |
8040 | one of | |
8041 | enum struct union if else while do for switch case default | |
8042 | break continue return goto asm sizeof typeof __alignof | |
8043 | unsigned long const short volatile signed restrict _Complex | |
8044 | in out inout bycopy byref oneway int char float double void _Bool | |
8045 | ||
8046 | ??? Why this selection of keywords but not, for example, storage | |
8047 | class specifiers? */ | |
8048 | ||
8049 | static tree | |
8050 | c_parser_objc_selector (c_parser *parser) | |
8051 | { | |
8052 | c_token *token = c_parser_peek_token (parser); | |
8053 | tree value = token->value; | |
8054 | if (token->type == CPP_NAME) | |
8055 | { | |
8056 | c_parser_consume_token (parser); | |
8057 | return value; | |
8058 | } | |
8059 | if (token->type != CPP_KEYWORD) | |
8060 | return NULL_TREE; | |
8061 | switch (token->keyword) | |
8062 | { | |
8063 | case RID_ENUM: | |
8064 | case RID_STRUCT: | |
8065 | case RID_UNION: | |
8066 | case RID_IF: | |
8067 | case RID_ELSE: | |
8068 | case RID_WHILE: | |
8069 | case RID_DO: | |
8070 | case RID_FOR: | |
8071 | case RID_SWITCH: | |
8072 | case RID_CASE: | |
8073 | case RID_DEFAULT: | |
8074 | case RID_BREAK: | |
8075 | case RID_CONTINUE: | |
8076 | case RID_RETURN: | |
8077 | case RID_GOTO: | |
8078 | case RID_ASM: | |
8079 | case RID_SIZEOF: | |
8080 | case RID_TYPEOF: | |
8081 | case RID_ALIGNOF: | |
8082 | case RID_UNSIGNED: | |
8083 | case RID_LONG: | |
a6766312 | 8084 | case RID_INT128: |
27bf414c JM |
8085 | case RID_CONST: |
8086 | case RID_SHORT: | |
8087 | case RID_VOLATILE: | |
8088 | case RID_SIGNED: | |
8089 | case RID_RESTRICT: | |
8090 | case RID_COMPLEX: | |
8091 | case RID_IN: | |
8092 | case RID_OUT: | |
8093 | case RID_INOUT: | |
8094 | case RID_BYCOPY: | |
8095 | case RID_BYREF: | |
8096 | case RID_ONEWAY: | |
8097 | case RID_INT: | |
8098 | case RID_CHAR: | |
8099 | case RID_FLOAT: | |
8100 | case RID_DOUBLE: | |
8101 | case RID_VOID: | |
8102 | case RID_BOOL: | |
8103 | c_parser_consume_token (parser); | |
8104 | return value; | |
8105 | default: | |
8106 | return NULL_TREE; | |
8107 | } | |
8108 | } | |
8109 | ||
8110 | /* Parse an objc-selector-arg. | |
8111 | ||
8112 | objc-selector-arg: | |
8113 | objc-selector | |
8114 | objc-keywordname-list | |
8115 | ||
8116 | objc-keywordname-list: | |
8117 | objc-keywordname | |
8118 | objc-keywordname-list objc-keywordname | |
8119 | ||
8120 | objc-keywordname: | |
8121 | objc-selector : | |
8122 | : | |
8123 | */ | |
8124 | ||
8125 | static tree | |
8126 | c_parser_objc_selector_arg (c_parser *parser) | |
8127 | { | |
8128 | tree sel = c_parser_objc_selector (parser); | |
8129 | tree list = NULL_TREE; | |
8130 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8131 | return sel; | |
8132 | while (true) | |
8133 | { | |
8134 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
8135 | return list; | |
8136 | list = chainon (list, build_tree_list (sel, NULL_TREE)); | |
8137 | sel = c_parser_objc_selector (parser); | |
8138 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8139 | break; | |
8140 | } | |
8141 | return list; | |
8142 | } | |
8143 | ||
8144 | /* Parse an objc-receiver. | |
8145 | ||
8146 | objc-receiver: | |
8147 | expression | |
8148 | class-name | |
8149 | type-name | |
8150 | */ | |
8151 | ||
8152 | static tree | |
8153 | c_parser_objc_receiver (c_parser *parser) | |
8154 | { | |
8155 | if (c_parser_peek_token (parser)->type == CPP_NAME | |
8156 | && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME | |
8157 | || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)) | |
8158 | { | |
8159 | tree id = c_parser_peek_token (parser)->value; | |
8160 | c_parser_consume_token (parser); | |
8161 | return objc_get_class_reference (id); | |
8162 | } | |
928c19bb | 8163 | return c_fully_fold (c_parser_expression (parser).value, false, NULL); |
27bf414c JM |
8164 | } |
8165 | ||
8166 | /* Parse objc-message-args. | |
8167 | ||
8168 | objc-message-args: | |
8169 | objc-selector | |
8170 | objc-keywordarg-list | |
8171 | ||
8172 | objc-keywordarg-list: | |
8173 | objc-keywordarg | |
8174 | objc-keywordarg-list objc-keywordarg | |
8175 | ||
8176 | objc-keywordarg: | |
8177 | objc-selector : objc-keywordexpr | |
8178 | : objc-keywordexpr | |
8179 | */ | |
8180 | ||
8181 | static tree | |
8182 | c_parser_objc_message_args (c_parser *parser) | |
8183 | { | |
8184 | tree sel = c_parser_objc_selector (parser); | |
8185 | tree list = NULL_TREE; | |
8186 | if (sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8187 | return sel; | |
8188 | while (true) | |
8189 | { | |
8190 | tree keywordexpr; | |
8191 | if (!c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
0a7d7dea | 8192 | return error_mark_node; |
27bf414c JM |
8193 | keywordexpr = c_parser_objc_keywordexpr (parser); |
8194 | list = chainon (list, build_tree_list (sel, keywordexpr)); | |
8195 | sel = c_parser_objc_selector (parser); | |
8196 | if (!sel && c_parser_next_token_is_not (parser, CPP_COLON)) | |
8197 | break; | |
8198 | } | |
8199 | return list; | |
8200 | } | |
8201 | ||
8202 | /* Parse an objc-keywordexpr. | |
8203 | ||
8204 | objc-keywordexpr: | |
8205 | nonempty-expr-list | |
8206 | */ | |
8207 | ||
8208 | static tree | |
8209 | c_parser_objc_keywordexpr (c_parser *parser) | |
8210 | { | |
bbbbb16a | 8211 | tree ret; |
1a4049e7 | 8212 | VEC(tree,gc) *expr_list = c_parser_expr_list (parser, true, true, |
3a785c97 | 8213 | NULL, NULL, NULL); |
bbbbb16a | 8214 | if (VEC_length (tree, expr_list) == 1) |
27bf414c JM |
8215 | { |
8216 | /* Just return the expression, remove a level of | |
8217 | indirection. */ | |
bbbbb16a | 8218 | ret = VEC_index (tree, expr_list, 0); |
27bf414c JM |
8219 | } |
8220 | else | |
8221 | { | |
8222 | /* We have a comma expression, we will collapse later. */ | |
c166b898 | 8223 | ret = build_tree_list_vec (expr_list); |
27bf414c | 8224 | } |
c166b898 | 8225 | release_tree_vector (expr_list); |
bbbbb16a | 8226 | return ret; |
27bf414c JM |
8227 | } |
8228 | ||
c165dca7 IS |
8229 | /* A check, needed in several places, that ObjC interface, implementation or |
8230 | method definitions are not prefixed by incorrect items. */ | |
8231 | static bool | |
8232 | c_parser_objc_diagnose_bad_element_prefix (c_parser *parser, | |
8233 | struct c_declspecs *specs) | |
8234 | { | |
9e5b2115 PB |
8235 | if (!specs->declspecs_seen_p || specs->non_sc_seen_p |
8236 | || specs->typespec_kind != ctsk_none) | |
c165dca7 IS |
8237 | { |
8238 | c_parser_error (parser, | |
8239 | "no type or storage class may be specified here,"); | |
8240 | c_parser_skip_to_end_of_block_or_statement (parser); | |
8241 | return true; | |
8242 | } | |
8243 | return false; | |
8244 | } | |
668ea4b1 | 8245 | |
f614132b | 8246 | /* Parse an Objective-C @property declaration. The syntax is: |
668ea4b1 | 8247 | |
f614132b NP |
8248 | objc-property-declaration: |
8249 | '@property' objc-property-attributes[opt] struct-declaration ; | |
668ea4b1 | 8250 | |
f614132b NP |
8251 | objc-property-attributes: |
8252 | '(' objc-property-attribute-list ')' | |
8253 | ||
8254 | objc-property-attribute-list: | |
8255 | objc-property-attribute | |
8256 | objc-property-attribute-list, objc-property-attribute | |
8257 | ||
8258 | objc-property-attribute | |
8259 | 'getter' = identifier | |
8260 | 'setter' = identifier | |
8261 | 'readonly' | |
8262 | 'readwrite' | |
8263 | 'assign' | |
8264 | 'retain' | |
8265 | 'copy' | |
8266 | 'nonatomic' | |
8267 | ||
8268 | For example: | |
8269 | @property NSString *name; | |
8270 | @property (readonly) id object; | |
8271 | @property (retain, nonatomic, getter=getTheName) id name; | |
8272 | @property int a, b, c; | |
8273 | ||
8274 | PS: This function is identical to cp_parser_objc_at_propery_declaration | |
200290f2 | 8275 | for C++. Keep them in sync. */ |
668ea4b1 | 8276 | static void |
f614132b | 8277 | c_parser_objc_at_property_declaration (c_parser *parser) |
668ea4b1 | 8278 | { |
200290f2 NP |
8279 | /* The following variables hold the attributes of the properties as |
8280 | parsed. They are 'false' or 'NULL_TREE' if the attribute was not | |
8281 | seen. When we see an attribute, we set them to 'true' (if they | |
8282 | are boolean properties) or to the identifier (if they have an | |
8283 | argument, ie, for getter and setter). Note that here we only | |
8284 | parse the list of attributes, check the syntax and accumulate the | |
8285 | attributes that we find. objc_add_property_declaration() will | |
8286 | then process the information. */ | |
8287 | bool property_assign = false; | |
8288 | bool property_copy = false; | |
8289 | tree property_getter_ident = NULL_TREE; | |
8290 | bool property_nonatomic = false; | |
8291 | bool property_readonly = false; | |
8292 | bool property_readwrite = false; | |
8293 | bool property_retain = false; | |
8294 | tree property_setter_ident = NULL_TREE; | |
200290f2 NP |
8295 | |
8296 | /* 'properties' is the list of properties that we read. Usually a | |
8297 | single one, but maybe more (eg, in "@property int a, b, c;" there | |
8298 | are three). */ | |
f614132b NP |
8299 | tree properties; |
8300 | location_t loc; | |
200290f2 | 8301 | |
f614132b NP |
8302 | loc = c_parser_peek_token (parser)->location; |
8303 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY)); | |
668ea4b1 | 8304 | |
f614132b | 8305 | c_parser_consume_token (parser); /* Eat '@property'. */ |
668ea4b1 | 8306 | |
f614132b NP |
8307 | /* Parse the optional attribute list... */ |
8308 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
668ea4b1 | 8309 | { |
f614132b NP |
8310 | /* Eat the '(' */ |
8311 | c_parser_consume_token (parser); | |
8312 | ||
8313 | /* Property attribute keywords are valid now. */ | |
8314 | parser->objc_property_attr_context = true; | |
8315 | ||
8316 | while (true) | |
668ea4b1 | 8317 | { |
f614132b NP |
8318 | bool syntax_error = false; |
8319 | c_token *token = c_parser_peek_token (parser); | |
8320 | enum rid keyword; | |
8321 | ||
8322 | if (token->type != CPP_KEYWORD) | |
8323 | { | |
8324 | if (token->type == CPP_CLOSE_PAREN) | |
8325 | c_parser_error (parser, "expected identifier"); | |
8326 | else | |
8327 | { | |
8328 | c_parser_consume_token (parser); | |
8329 | c_parser_error (parser, "unknown property attribute"); | |
8330 | } | |
8331 | break; | |
8332 | } | |
8333 | keyword = token->keyword; | |
200290f2 | 8334 | c_parser_consume_token (parser); |
f614132b NP |
8335 | switch (keyword) |
8336 | { | |
200290f2 | 8337 | case RID_ASSIGN: property_assign = true; break; |
200290f2 NP |
8338 | case RID_COPY: property_copy = true; break; |
8339 | case RID_NONATOMIC: property_nonatomic = true; break; | |
8340 | case RID_READONLY: property_readonly = true; break; | |
8341 | case RID_READWRITE: property_readwrite = true; break; | |
8342 | case RID_RETAIN: property_retain = true; break; | |
8343 | ||
f614132b NP |
8344 | case RID_GETTER: |
8345 | case RID_SETTER: | |
f614132b NP |
8346 | if (c_parser_next_token_is_not (parser, CPP_EQ)) |
8347 | { | |
d853ee42 NP |
8348 | if (keyword == RID_GETTER) |
8349 | c_parser_error (parser, | |
8350 | "missing %<=%> (after %<getter%> attribute)"); | |
8351 | else | |
8352 | c_parser_error (parser, | |
8353 | "missing %<=%> (after %<setter%> attribute)"); | |
f614132b NP |
8354 | syntax_error = true; |
8355 | break; | |
8356 | } | |
8357 | c_parser_consume_token (parser); /* eat the = */ | |
8358 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8359 | { | |
8360 | c_parser_error (parser, "expected identifier"); | |
8361 | syntax_error = true; | |
8362 | break; | |
8363 | } | |
f614132b NP |
8364 | if (keyword == RID_SETTER) |
8365 | { | |
200290f2 NP |
8366 | if (property_setter_ident != NULL_TREE) |
8367 | c_parser_error (parser, "the %<setter%> attribute may only be specified once"); | |
8368 | else | |
8369 | property_setter_ident = c_parser_peek_token (parser)->value; | |
f614132b | 8370 | c_parser_consume_token (parser); |
200290f2 NP |
8371 | if (c_parser_next_token_is_not (parser, CPP_COLON)) |
8372 | c_parser_error (parser, "setter name must terminate with %<:%>"); | |
8373 | else | |
8374 | c_parser_consume_token (parser); | |
f614132b | 8375 | } |
46a88c12 | 8376 | else |
f614132b | 8377 | { |
200290f2 NP |
8378 | if (property_getter_ident != NULL_TREE) |
8379 | c_parser_error (parser, "the %<getter%> attribute may only be specified once"); | |
8380 | else | |
8381 | property_getter_ident = c_parser_peek_token (parser)->value; | |
f614132b | 8382 | c_parser_consume_token (parser); |
f614132b | 8383 | } |
200290f2 NP |
8384 | break; |
8385 | default: | |
8386 | c_parser_error (parser, "unknown property attribute"); | |
f614132b NP |
8387 | syntax_error = true; |
8388 | break; | |
8389 | } | |
8390 | ||
8391 | if (syntax_error) | |
668ea4b1 | 8392 | break; |
f614132b NP |
8393 | |
8394 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
668ea4b1 | 8395 | c_parser_consume_token (parser); |
f614132b | 8396 | else |
668ea4b1 IS |
8397 | break; |
8398 | } | |
f614132b NP |
8399 | parser->objc_property_attr_context = false; |
8400 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8401 | } | |
8402 | /* ... and the property declaration(s). */ | |
8403 | properties = c_parser_struct_declaration (parser); | |
668ea4b1 | 8404 | |
f614132b NP |
8405 | if (properties == error_mark_node) |
8406 | { | |
8407 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8408 | parser->error = false; | |
8409 | return; | |
8410 | } | |
668ea4b1 | 8411 | |
f614132b NP |
8412 | if (properties == NULL_TREE) |
8413 | c_parser_error (parser, "expected identifier"); | |
8414 | else | |
8415 | { | |
8416 | /* Comma-separated properties are chained together in | |
8417 | reverse order; add them one by one. */ | |
8418 | properties = nreverse (properties); | |
8419 | ||
8420 | for (; properties; properties = TREE_CHAIN (properties)) | |
200290f2 NP |
8421 | objc_add_property_declaration (loc, copy_node (properties), |
8422 | property_readonly, property_readwrite, | |
8423 | property_assign, property_retain, | |
8424 | property_copy, property_nonatomic, | |
46a88c12 | 8425 | property_getter_ident, property_setter_ident); |
f614132b | 8426 | } |
668ea4b1 IS |
8427 | |
8428 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
f614132b | 8429 | parser->error = false; |
668ea4b1 IS |
8430 | } |
8431 | ||
da57d1b9 NP |
8432 | /* Parse an Objective-C @synthesize declaration. The syntax is: |
8433 | ||
8434 | objc-synthesize-declaration: | |
8435 | @synthesize objc-synthesize-identifier-list ; | |
8436 | ||
8437 | objc-synthesize-identifier-list: | |
8438 | objc-synthesize-identifier | |
8439 | objc-synthesize-identifier-list, objc-synthesize-identifier | |
8440 | ||
8441 | objc-synthesize-identifier | |
8442 | identifier | |
8443 | identifier = identifier | |
8444 | ||
8445 | For example: | |
8446 | @synthesize MyProperty; | |
8447 | @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty; | |
8448 | ||
8449 | PS: This function is identical to cp_parser_objc_at_synthesize_declaration | |
8450 | for C++. Keep them in sync. | |
8451 | */ | |
8452 | static void | |
8453 | c_parser_objc_at_synthesize_declaration (c_parser *parser) | |
8454 | { | |
8455 | tree list = NULL_TREE; | |
8456 | location_t loc; | |
8457 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNTHESIZE)); | |
8458 | loc = c_parser_peek_token (parser)->location; | |
8459 | ||
8460 | c_parser_consume_token (parser); | |
8461 | while (true) | |
8462 | { | |
8463 | tree property, ivar; | |
8464 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8465 | { | |
8466 | c_parser_error (parser, "expected identifier"); | |
8467 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8468 | /* Once we find the semicolon, we can resume normal parsing. | |
8469 | We have to reset parser->error manually because | |
8470 | c_parser_skip_until_found() won't reset it for us if the | |
8471 | next token is precisely a semicolon. */ | |
8472 | parser->error = false; | |
8473 | return; | |
8474 | } | |
8475 | property = c_parser_peek_token (parser)->value; | |
8476 | c_parser_consume_token (parser); | |
8477 | if (c_parser_next_token_is (parser, CPP_EQ)) | |
8478 | { | |
8479 | c_parser_consume_token (parser); | |
8480 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8481 | { | |
8482 | c_parser_error (parser, "expected identifier"); | |
8483 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8484 | parser->error = false; | |
8485 | return; | |
8486 | } | |
8487 | ivar = c_parser_peek_token (parser)->value; | |
8488 | c_parser_consume_token (parser); | |
8489 | } | |
8490 | else | |
8491 | ivar = NULL_TREE; | |
8492 | list = chainon (list, build_tree_list (ivar, property)); | |
8493 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
8494 | c_parser_consume_token (parser); | |
8495 | else | |
8496 | break; | |
8497 | } | |
8498 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
8499 | objc_add_synthesize_declaration (loc, list); | |
8500 | } | |
8501 | ||
8502 | /* Parse an Objective-C @dynamic declaration. The syntax is: | |
8503 | ||
8504 | objc-dynamic-declaration: | |
8505 | @dynamic identifier-list ; | |
8506 | ||
8507 | For example: | |
8508 | @dynamic MyProperty; | |
8509 | @dynamic MyProperty, AnotherProperty; | |
8510 | ||
8511 | PS: This function is identical to cp_parser_objc_at_dynamic_declaration | |
8512 | for C++. Keep them in sync. | |
8513 | */ | |
8514 | static void | |
8515 | c_parser_objc_at_dynamic_declaration (c_parser *parser) | |
8516 | { | |
8517 | tree list = NULL_TREE; | |
8518 | location_t loc; | |
8519 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_DYNAMIC)); | |
8520 | loc = c_parser_peek_token (parser)->location; | |
8521 | ||
8522 | c_parser_consume_token (parser); | |
8523 | while (true) | |
8524 | { | |
8525 | tree property; | |
8526 | if (c_parser_next_token_is_not (parser, CPP_NAME)) | |
8527 | { | |
8528 | c_parser_error (parser, "expected identifier"); | |
8529 | c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL); | |
8530 | parser->error = false; | |
8531 | return; | |
8532 | } | |
8533 | property = c_parser_peek_token (parser)->value; | |
8534 | list = chainon (list, build_tree_list (NULL_TREE, property)); | |
8535 | c_parser_consume_token (parser); | |
8536 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
8537 | c_parser_consume_token (parser); | |
8538 | else | |
8539 | break; | |
8540 | } | |
8541 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
8542 | objc_add_dynamic_declaration (loc, list); | |
8543 | } | |
8544 | ||
27bf414c | 8545 | \f |
953ff289 DN |
8546 | /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore |
8547 | should be considered, statements. ALLOW_STMT is true if we're within | |
8548 | the context of a function and such pragmas are to be allowed. Returns | |
8549 | true if we actually parsed such a pragma. */ | |
27bf414c | 8550 | |
bc4071dd | 8551 | static bool |
953ff289 | 8552 | c_parser_pragma (c_parser *parser, enum pragma_context context) |
bc4071dd RH |
8553 | { |
8554 | unsigned int id; | |
8555 | ||
8556 | id = c_parser_peek_token (parser)->pragma_kind; | |
8557 | gcc_assert (id != PRAGMA_NONE); | |
8558 | ||
8559 | switch (id) | |
8560 | { | |
953ff289 DN |
8561 | case PRAGMA_OMP_BARRIER: |
8562 | if (context != pragma_compound) | |
8563 | { | |
8564 | if (context == pragma_stmt) | |
8565 | c_parser_error (parser, "%<#pragma omp barrier%> may only be " | |
8566 | "used in compound statements"); | |
8567 | goto bad_stmt; | |
8568 | } | |
8569 | c_parser_omp_barrier (parser); | |
8570 | return false; | |
8571 | ||
8572 | case PRAGMA_OMP_FLUSH: | |
8573 | if (context != pragma_compound) | |
8574 | { | |
8575 | if (context == pragma_stmt) | |
8576 | c_parser_error (parser, "%<#pragma omp flush%> may only be " | |
8577 | "used in compound statements"); | |
8578 | goto bad_stmt; | |
8579 | } | |
8580 | c_parser_omp_flush (parser); | |
8581 | return false; | |
8582 | ||
a68ab351 JJ |
8583 | case PRAGMA_OMP_TASKWAIT: |
8584 | if (context != pragma_compound) | |
8585 | { | |
8586 | if (context == pragma_stmt) | |
8587 | c_parser_error (parser, "%<#pragma omp taskwait%> may only be " | |
8588 | "used in compound statements"); | |
8589 | goto bad_stmt; | |
8590 | } | |
8591 | c_parser_omp_taskwait (parser); | |
8592 | return false; | |
8593 | ||
20906c66 JJ |
8594 | case PRAGMA_OMP_TASKYIELD: |
8595 | if (context != pragma_compound) | |
8596 | { | |
8597 | if (context == pragma_stmt) | |
8598 | c_parser_error (parser, "%<#pragma omp taskyield%> may only be " | |
8599 | "used in compound statements"); | |
8600 | goto bad_stmt; | |
8601 | } | |
8602 | c_parser_omp_taskyield (parser); | |
8603 | return false; | |
8604 | ||
953ff289 DN |
8605 | case PRAGMA_OMP_THREADPRIVATE: |
8606 | c_parser_omp_threadprivate (parser); | |
8607 | return false; | |
8608 | ||
8609 | case PRAGMA_OMP_SECTION: | |
3ba09659 AH |
8610 | error_at (c_parser_peek_token (parser)->location, |
8611 | "%<#pragma omp section%> may only be used in " | |
8612 | "%<#pragma omp sections%> construct"); | |
953ff289 DN |
8613 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); |
8614 | return false; | |
8615 | ||
bc4071dd RH |
8616 | case PRAGMA_GCC_PCH_PREPROCESS: |
8617 | c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first"); | |
8618 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
8619 | return false; | |
8620 | ||
8621 | default: | |
953ff289 DN |
8622 | if (id < PRAGMA_FIRST_EXTERNAL) |
8623 | { | |
8624 | if (context == pragma_external) | |
8625 | { | |
8626 | bad_stmt: | |
8627 | c_parser_error (parser, "expected declaration specifiers"); | |
8628 | c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL); | |
8629 | return false; | |
8630 | } | |
8631 | c_parser_omp_construct (parser); | |
8632 | return true; | |
8633 | } | |
bc4071dd RH |
8634 | break; |
8635 | } | |
8636 | ||
8637 | c_parser_consume_pragma (parser); | |
8638 | c_invoke_pragma_handler (id); | |
27bf414c | 8639 | |
b8698a0f | 8640 | /* Skip to EOL, but suppress any error message. Those will have been |
bc4071dd RH |
8641 | generated by the handler routine through calling error, as opposed |
8642 | to calling c_parser_error. */ | |
8643 | parser->error = true; | |
8644 | c_parser_skip_to_pragma_eol (parser); | |
8645 | ||
8646 | return false; | |
8647 | } | |
8648 | ||
8649 | /* The interface the pragma parsers have to the lexer. */ | |
8650 | ||
8651 | enum cpp_ttype | |
8652 | pragma_lex (tree *value) | |
8653 | { | |
8654 | c_token *tok = c_parser_peek_token (the_parser); | |
8655 | enum cpp_ttype ret = tok->type; | |
8656 | ||
8657 | *value = tok->value; | |
8658 | if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF) | |
8659 | ret = CPP_EOF; | |
8660 | else | |
8661 | { | |
8662 | if (ret == CPP_KEYWORD) | |
8663 | ret = CPP_NAME; | |
8664 | c_parser_consume_token (the_parser); | |
8665 | } | |
8666 | ||
8667 | return ret; | |
8668 | } | |
8669 | ||
8670 | static void | |
8671 | c_parser_pragma_pch_preprocess (c_parser *parser) | |
8672 | { | |
8673 | tree name = NULL; | |
8674 | ||
8675 | c_parser_consume_pragma (parser); | |
8676 | if (c_parser_next_token_is (parser, CPP_STRING)) | |
8677 | { | |
8678 | name = c_parser_peek_token (parser)->value; | |
8679 | c_parser_consume_token (parser); | |
8680 | } | |
8681 | else | |
8682 | c_parser_error (parser, "expected string literal"); | |
8683 | c_parser_skip_to_pragma_eol (parser); | |
8684 | ||
8685 | if (name) | |
8686 | c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name)); | |
8687 | } | |
953ff289 DN |
8688 | \f |
8689 | /* OpenMP 2.5 parsing routines. */ | |
8690 | ||
8691 | /* Returns name of the next clause. | |
8692 | If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and | |
8693 | the token is not consumed. Otherwise appropriate pragma_omp_clause is | |
8694 | returned and the token is consumed. */ | |
8695 | ||
8696 | static pragma_omp_clause | |
8697 | c_parser_omp_clause_name (c_parser *parser) | |
8698 | { | |
8699 | pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE; | |
8700 | ||
8701 | if (c_parser_next_token_is_keyword (parser, RID_IF)) | |
8702 | result = PRAGMA_OMP_CLAUSE_IF; | |
8703 | else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT)) | |
8704 | result = PRAGMA_OMP_CLAUSE_DEFAULT; | |
8705 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
8706 | { | |
8707 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8708 | ||
8709 | switch (p[0]) | |
8710 | { | |
8711 | case 'c': | |
a68ab351 JJ |
8712 | if (!strcmp ("collapse", p)) |
8713 | result = PRAGMA_OMP_CLAUSE_COLLAPSE; | |
8714 | else if (!strcmp ("copyin", p)) | |
953ff289 DN |
8715 | result = PRAGMA_OMP_CLAUSE_COPYIN; |
8716 | else if (!strcmp ("copyprivate", p)) | |
8717 | result = PRAGMA_OMP_CLAUSE_COPYPRIVATE; | |
8718 | break; | |
8719 | case 'f': | |
20906c66 JJ |
8720 | if (!strcmp ("final", p)) |
8721 | result = PRAGMA_OMP_CLAUSE_FINAL; | |
8722 | else if (!strcmp ("firstprivate", p)) | |
953ff289 DN |
8723 | result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE; |
8724 | break; | |
8725 | case 'l': | |
8726 | if (!strcmp ("lastprivate", p)) | |
8727 | result = PRAGMA_OMP_CLAUSE_LASTPRIVATE; | |
8728 | break; | |
20906c66 JJ |
8729 | case 'm': |
8730 | if (!strcmp ("mergeable", p)) | |
8731 | result = PRAGMA_OMP_CLAUSE_MERGEABLE; | |
8732 | break; | |
953ff289 DN |
8733 | case 'n': |
8734 | if (!strcmp ("nowait", p)) | |
8735 | result = PRAGMA_OMP_CLAUSE_NOWAIT; | |
8736 | else if (!strcmp ("num_threads", p)) | |
8737 | result = PRAGMA_OMP_CLAUSE_NUM_THREADS; | |
8738 | break; | |
8739 | case 'o': | |
8740 | if (!strcmp ("ordered", p)) | |
8741 | result = PRAGMA_OMP_CLAUSE_ORDERED; | |
8742 | break; | |
8743 | case 'p': | |
8744 | if (!strcmp ("private", p)) | |
8745 | result = PRAGMA_OMP_CLAUSE_PRIVATE; | |
8746 | break; | |
8747 | case 'r': | |
8748 | if (!strcmp ("reduction", p)) | |
8749 | result = PRAGMA_OMP_CLAUSE_REDUCTION; | |
8750 | break; | |
8751 | case 's': | |
8752 | if (!strcmp ("schedule", p)) | |
8753 | result = PRAGMA_OMP_CLAUSE_SCHEDULE; | |
8754 | else if (!strcmp ("shared", p)) | |
8755 | result = PRAGMA_OMP_CLAUSE_SHARED; | |
8756 | break; | |
a68ab351 JJ |
8757 | case 'u': |
8758 | if (!strcmp ("untied", p)) | |
8759 | result = PRAGMA_OMP_CLAUSE_UNTIED; | |
8760 | break; | |
953ff289 DN |
8761 | } |
8762 | } | |
8763 | ||
8764 | if (result != PRAGMA_OMP_CLAUSE_NONE) | |
8765 | c_parser_consume_token (parser); | |
8766 | ||
8767 | return result; | |
8768 | } | |
8769 | ||
8770 | /* Validate that a clause of the given type does not already exist. */ | |
8771 | ||
8772 | static void | |
d75d71e0 ILT |
8773 | check_no_duplicate_clause (tree clauses, enum omp_clause_code code, |
8774 | const char *name) | |
953ff289 DN |
8775 | { |
8776 | tree c; | |
8777 | ||
8778 | for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c)) | |
aaf46ef9 | 8779 | if (OMP_CLAUSE_CODE (c) == code) |
953ff289 | 8780 | { |
c2255bc4 AH |
8781 | location_t loc = OMP_CLAUSE_LOCATION (c); |
8782 | error_at (loc, "too many %qs clauses", name); | |
953ff289 DN |
8783 | break; |
8784 | } | |
8785 | } | |
8786 | ||
8787 | /* OpenMP 2.5: | |
8788 | variable-list: | |
8789 | identifier | |
8790 | variable-list , identifier | |
8791 | ||
c2255bc4 AH |
8792 | If KIND is nonzero, create the appropriate node and install the |
8793 | decl in OMP_CLAUSE_DECL and add the node to the head of the list. | |
8794 | If KIND is nonzero, CLAUSE_LOC is the location of the clause. | |
953ff289 DN |
8795 | |
8796 | If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE; | |
8797 | return the list created. */ | |
8798 | ||
8799 | static tree | |
c2255bc4 AH |
8800 | c_parser_omp_variable_list (c_parser *parser, |
8801 | location_t clause_loc, | |
8802 | enum omp_clause_code kind, | |
aaf46ef9 | 8803 | tree list) |
953ff289 DN |
8804 | { |
8805 | if (c_parser_next_token_is_not (parser, CPP_NAME) | |
8806 | || c_parser_peek_token (parser)->id_kind != C_ID_ID) | |
8807 | c_parser_error (parser, "expected identifier"); | |
8808 | ||
8809 | while (c_parser_next_token_is (parser, CPP_NAME) | |
8810 | && c_parser_peek_token (parser)->id_kind == C_ID_ID) | |
8811 | { | |
8812 | tree t = lookup_name (c_parser_peek_token (parser)->value); | |
8813 | ||
8814 | if (t == NULL_TREE) | |
c2255bc4 AH |
8815 | undeclared_variable (c_parser_peek_token (parser)->location, |
8816 | c_parser_peek_token (parser)->value); | |
953ff289 DN |
8817 | else if (t == error_mark_node) |
8818 | ; | |
8819 | else if (kind != 0) | |
8820 | { | |
c2255bc4 | 8821 | tree u = build_omp_clause (clause_loc, kind); |
953ff289 DN |
8822 | OMP_CLAUSE_DECL (u) = t; |
8823 | OMP_CLAUSE_CHAIN (u) = list; | |
8824 | list = u; | |
8825 | } | |
8826 | else | |
8827 | list = tree_cons (t, NULL_TREE, list); | |
8828 | ||
8829 | c_parser_consume_token (parser); | |
8830 | ||
8831 | if (c_parser_next_token_is_not (parser, CPP_COMMA)) | |
8832 | break; | |
8833 | ||
8834 | c_parser_consume_token (parser); | |
8835 | } | |
8836 | ||
8837 | return list; | |
8838 | } | |
8839 | ||
8840 | /* Similarly, but expect leading and trailing parenthesis. This is a very | |
8841 | common case for omp clauses. */ | |
8842 | ||
8843 | static tree | |
d75d71e0 ILT |
8844 | c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind, |
8845 | tree list) | |
953ff289 | 8846 | { |
c2255bc4 AH |
8847 | /* The clauses location. */ |
8848 | location_t loc = c_parser_peek_token (parser)->location; | |
8849 | ||
953ff289 DN |
8850 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
8851 | { | |
c2255bc4 | 8852 | list = c_parser_omp_variable_list (parser, loc, kind, list); |
953ff289 DN |
8853 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
8854 | } | |
8855 | return list; | |
8856 | } | |
8857 | ||
a68ab351 JJ |
8858 | /* OpenMP 3.0: |
8859 | collapse ( constant-expression ) */ | |
8860 | ||
8861 | static tree | |
8862 | c_parser_omp_clause_collapse (c_parser *parser, tree list) | |
8863 | { | |
8864 | tree c, num = error_mark_node; | |
8865 | HOST_WIDE_INT n; | |
8866 | location_t loc; | |
8867 | ||
8868 | check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse"); | |
8869 | ||
8870 | loc = c_parser_peek_token (parser)->location; | |
8871 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
8872 | { | |
8873 | num = c_parser_expr_no_commas (parser, NULL).value; | |
8874 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8875 | } | |
8876 | if (num == error_mark_node) | |
8877 | return list; | |
8878 | if (!INTEGRAL_TYPE_P (TREE_TYPE (num)) | |
8879 | || !host_integerp (num, 0) | |
8880 | || (n = tree_low_cst (num, 0)) <= 0 | |
8881 | || (int) n != n) | |
8882 | { | |
3ba09659 AH |
8883 | error_at (loc, |
8884 | "collapse argument needs positive constant integer expression"); | |
a68ab351 JJ |
8885 | return list; |
8886 | } | |
c2255bc4 | 8887 | c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE); |
a68ab351 JJ |
8888 | OMP_CLAUSE_COLLAPSE_EXPR (c) = num; |
8889 | OMP_CLAUSE_CHAIN (c) = list; | |
8890 | return c; | |
8891 | } | |
8892 | ||
953ff289 DN |
8893 | /* OpenMP 2.5: |
8894 | copyin ( variable-list ) */ | |
8895 | ||
8896 | static tree | |
8897 | c_parser_omp_clause_copyin (c_parser *parser, tree list) | |
8898 | { | |
8899 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list); | |
8900 | } | |
8901 | ||
8902 | /* OpenMP 2.5: | |
8903 | copyprivate ( variable-list ) */ | |
8904 | ||
8905 | static tree | |
8906 | c_parser_omp_clause_copyprivate (c_parser *parser, tree list) | |
8907 | { | |
8908 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list); | |
8909 | } | |
8910 | ||
8911 | /* OpenMP 2.5: | |
8912 | default ( shared | none ) */ | |
8913 | ||
8914 | static tree | |
8915 | c_parser_omp_clause_default (c_parser *parser, tree list) | |
8916 | { | |
8917 | enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED; | |
c2255bc4 | 8918 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
8919 | tree c; |
8920 | ||
8921 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
8922 | return list; | |
8923 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
8924 | { | |
8925 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
8926 | ||
8927 | switch (p[0]) | |
8928 | { | |
8929 | case 'n': | |
8930 | if (strcmp ("none", p) != 0) | |
8931 | goto invalid_kind; | |
8932 | kind = OMP_CLAUSE_DEFAULT_NONE; | |
8933 | break; | |
8934 | ||
8935 | case 's': | |
8936 | if (strcmp ("shared", p) != 0) | |
8937 | goto invalid_kind; | |
8938 | kind = OMP_CLAUSE_DEFAULT_SHARED; | |
8939 | break; | |
8940 | ||
8941 | default: | |
8942 | goto invalid_kind; | |
8943 | } | |
8944 | ||
8945 | c_parser_consume_token (parser); | |
8946 | } | |
8947 | else | |
8948 | { | |
8949 | invalid_kind: | |
8950 | c_parser_error (parser, "expected %<none%> or %<shared%>"); | |
8951 | } | |
8952 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
8953 | ||
8954 | if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED) | |
8955 | return list; | |
8956 | ||
8957 | check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default"); | |
c2255bc4 | 8958 | c = build_omp_clause (loc, OMP_CLAUSE_DEFAULT); |
953ff289 DN |
8959 | OMP_CLAUSE_CHAIN (c) = list; |
8960 | OMP_CLAUSE_DEFAULT_KIND (c) = kind; | |
8961 | ||
8962 | return c; | |
8963 | } | |
8964 | ||
8965 | /* OpenMP 2.5: | |
8966 | firstprivate ( variable-list ) */ | |
8967 | ||
8968 | static tree | |
8969 | c_parser_omp_clause_firstprivate (c_parser *parser, tree list) | |
8970 | { | |
8971 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list); | |
8972 | } | |
8973 | ||
20906c66 JJ |
8974 | /* OpenMP 3.1: |
8975 | final ( expression ) */ | |
8976 | ||
8977 | static tree | |
8978 | c_parser_omp_clause_final (c_parser *parser, tree list) | |
8979 | { | |
8980 | location_t loc = c_parser_peek_token (parser)->location; | |
8981 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
8982 | { | |
8983 | tree t = c_parser_paren_condition (parser); | |
8984 | tree c; | |
8985 | ||
8986 | check_no_duplicate_clause (list, OMP_CLAUSE_FINAL, "final"); | |
8987 | ||
8988 | c = build_omp_clause (loc, OMP_CLAUSE_FINAL); | |
8989 | OMP_CLAUSE_FINAL_EXPR (c) = t; | |
8990 | OMP_CLAUSE_CHAIN (c) = list; | |
8991 | list = c; | |
8992 | } | |
8993 | else | |
8994 | c_parser_error (parser, "expected %<(%>"); | |
8995 | ||
8996 | return list; | |
8997 | } | |
8998 | ||
953ff289 DN |
8999 | /* OpenMP 2.5: |
9000 | if ( expression ) */ | |
9001 | ||
9002 | static tree | |
9003 | c_parser_omp_clause_if (c_parser *parser, tree list) | |
9004 | { | |
c2255bc4 | 9005 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9006 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) |
9007 | { | |
9008 | tree t = c_parser_paren_condition (parser); | |
9009 | tree c; | |
9010 | ||
9011 | check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if"); | |
9012 | ||
c2255bc4 | 9013 | c = build_omp_clause (loc, OMP_CLAUSE_IF); |
953ff289 DN |
9014 | OMP_CLAUSE_IF_EXPR (c) = t; |
9015 | OMP_CLAUSE_CHAIN (c) = list; | |
9016 | list = c; | |
9017 | } | |
9018 | else | |
9019 | c_parser_error (parser, "expected %<(%>"); | |
9020 | ||
9021 | return list; | |
9022 | } | |
9023 | ||
9024 | /* OpenMP 2.5: | |
9025 | lastprivate ( variable-list ) */ | |
9026 | ||
9027 | static tree | |
9028 | c_parser_omp_clause_lastprivate (c_parser *parser, tree list) | |
9029 | { | |
9030 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list); | |
9031 | } | |
9032 | ||
20906c66 JJ |
9033 | /* OpenMP 3.1: |
9034 | mergeable */ | |
9035 | ||
9036 | static tree | |
9037 | c_parser_omp_clause_mergeable (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
9038 | { | |
9039 | tree c; | |
9040 | ||
9041 | /* FIXME: Should we allow duplicates? */ | |
9042 | check_no_duplicate_clause (list, OMP_CLAUSE_MERGEABLE, "mergeable"); | |
9043 | ||
9044 | c = build_omp_clause (c_parser_peek_token (parser)->location, | |
9045 | OMP_CLAUSE_MERGEABLE); | |
9046 | OMP_CLAUSE_CHAIN (c) = list; | |
9047 | ||
9048 | return c; | |
9049 | } | |
9050 | ||
953ff289 DN |
9051 | /* OpenMP 2.5: |
9052 | nowait */ | |
9053 | ||
9054 | static tree | |
9055 | c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
9056 | { | |
9057 | tree c; | |
c2255bc4 | 9058 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9059 | |
9060 | check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait"); | |
9061 | ||
c2255bc4 | 9062 | c = build_omp_clause (loc, OMP_CLAUSE_NOWAIT); |
953ff289 DN |
9063 | OMP_CLAUSE_CHAIN (c) = list; |
9064 | return c; | |
9065 | } | |
9066 | ||
9067 | /* OpenMP 2.5: | |
9068 | num_threads ( expression ) */ | |
9069 | ||
9070 | static tree | |
9071 | c_parser_omp_clause_num_threads (c_parser *parser, tree list) | |
9072 | { | |
c2255bc4 | 9073 | location_t num_threads_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9074 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
9075 | { | |
c7412148 | 9076 | location_t expr_loc = c_parser_peek_token (parser)->location; |
953ff289 | 9077 | tree c, t = c_parser_expression (parser).value; |
7d1362bc | 9078 | mark_exp_read (t); |
928c19bb | 9079 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
9080 | |
9081 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9082 | ||
9083 | if (!INTEGRAL_TYPE_P (TREE_TYPE (t))) | |
9084 | { | |
9085 | c_parser_error (parser, "expected integer expression"); | |
9086 | return list; | |
9087 | } | |
9088 | ||
9089 | /* Attempt to statically determine when the number isn't positive. */ | |
db3927fb | 9090 | c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t, |
953ff289 | 9091 | build_int_cst (TREE_TYPE (t), 0)); |
c2255bc4 AH |
9092 | if (CAN_HAVE_LOCATION_P (c)) |
9093 | SET_EXPR_LOCATION (c, expr_loc); | |
953ff289 DN |
9094 | if (c == boolean_true_node) |
9095 | { | |
3ba09659 AH |
9096 | warning_at (expr_loc, 0, |
9097 | "%<num_threads%> value must be positive"); | |
953ff289 DN |
9098 | t = integer_one_node; |
9099 | } | |
9100 | ||
9101 | check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads"); | |
9102 | ||
c2255bc4 | 9103 | c = build_omp_clause (num_threads_loc, OMP_CLAUSE_NUM_THREADS); |
953ff289 DN |
9104 | OMP_CLAUSE_NUM_THREADS_EXPR (c) = t; |
9105 | OMP_CLAUSE_CHAIN (c) = list; | |
9106 | list = c; | |
9107 | } | |
9108 | ||
9109 | return list; | |
9110 | } | |
9111 | ||
9112 | /* OpenMP 2.5: | |
9113 | ordered */ | |
9114 | ||
9115 | static tree | |
c2255bc4 | 9116 | c_parser_omp_clause_ordered (c_parser *parser, tree list) |
953ff289 DN |
9117 | { |
9118 | tree c; | |
9119 | ||
9120 | check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered"); | |
9121 | ||
c2255bc4 AH |
9122 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
9123 | OMP_CLAUSE_ORDERED); | |
953ff289 | 9124 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 9125 | |
953ff289 DN |
9126 | return c; |
9127 | } | |
9128 | ||
9129 | /* OpenMP 2.5: | |
9130 | private ( variable-list ) */ | |
9131 | ||
9132 | static tree | |
9133 | c_parser_omp_clause_private (c_parser *parser, tree list) | |
9134 | { | |
9135 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list); | |
9136 | } | |
9137 | ||
9138 | /* OpenMP 2.5: | |
9139 | reduction ( reduction-operator : variable-list ) | |
9140 | ||
9141 | reduction-operator: | |
20906c66 JJ |
9142 | One of: + * - & ^ | && || |
9143 | ||
9144 | OpenMP 3.1: | |
9145 | ||
9146 | reduction-operator: | |
9147 | One of: + * - & ^ | && || max min */ | |
953ff289 DN |
9148 | |
9149 | static tree | |
9150 | c_parser_omp_clause_reduction (c_parser *parser, tree list) | |
9151 | { | |
c2255bc4 | 9152 | location_t clause_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9153 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
9154 | { | |
9155 | enum tree_code code; | |
9156 | ||
9157 | switch (c_parser_peek_token (parser)->type) | |
9158 | { | |
9159 | case CPP_PLUS: | |
9160 | code = PLUS_EXPR; | |
9161 | break; | |
9162 | case CPP_MULT: | |
9163 | code = MULT_EXPR; | |
9164 | break; | |
9165 | case CPP_MINUS: | |
9166 | code = MINUS_EXPR; | |
9167 | break; | |
9168 | case CPP_AND: | |
9169 | code = BIT_AND_EXPR; | |
9170 | break; | |
9171 | case CPP_XOR: | |
9172 | code = BIT_XOR_EXPR; | |
9173 | break; | |
9174 | case CPP_OR: | |
9175 | code = BIT_IOR_EXPR; | |
9176 | break; | |
9177 | case CPP_AND_AND: | |
9178 | code = TRUTH_ANDIF_EXPR; | |
9179 | break; | |
9180 | case CPP_OR_OR: | |
9181 | code = TRUTH_ORIF_EXPR; | |
9182 | break; | |
20906c66 JJ |
9183 | case CPP_NAME: |
9184 | { | |
9185 | const char *p | |
9186 | = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
9187 | if (strcmp (p, "min") == 0) | |
9188 | { | |
9189 | code = MIN_EXPR; | |
9190 | break; | |
9191 | } | |
9192 | if (strcmp (p, "max") == 0) | |
9193 | { | |
9194 | code = MAX_EXPR; | |
9195 | break; | |
9196 | } | |
9197 | } | |
9198 | /* FALLTHRU */ | |
953ff289 DN |
9199 | default: |
9200 | c_parser_error (parser, | |
9201 | "expected %<+%>, %<*%>, %<-%>, %<&%>, " | |
20906c66 | 9202 | "%<^%>, %<|%>, %<&&%>, %<||%>, %<min%> or %<max%>"); |
953ff289 DN |
9203 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); |
9204 | return list; | |
9205 | } | |
9206 | c_parser_consume_token (parser); | |
9207 | if (c_parser_require (parser, CPP_COLON, "expected %<:%>")) | |
9208 | { | |
9209 | tree nl, c; | |
9210 | ||
c2255bc4 AH |
9211 | nl = c_parser_omp_variable_list (parser, clause_loc, |
9212 | OMP_CLAUSE_REDUCTION, list); | |
953ff289 DN |
9213 | for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c)) |
9214 | OMP_CLAUSE_REDUCTION_CODE (c) = code; | |
9215 | ||
9216 | list = nl; | |
9217 | } | |
9218 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9219 | } | |
9220 | return list; | |
9221 | } | |
9222 | ||
9223 | /* OpenMP 2.5: | |
9224 | schedule ( schedule-kind ) | |
9225 | schedule ( schedule-kind , expression ) | |
9226 | ||
9227 | schedule-kind: | |
a68ab351 | 9228 | static | dynamic | guided | runtime | auto |
953ff289 DN |
9229 | */ |
9230 | ||
9231 | static tree | |
9232 | c_parser_omp_clause_schedule (c_parser *parser, tree list) | |
9233 | { | |
9234 | tree c, t; | |
c2255bc4 | 9235 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9236 | |
9237 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) | |
9238 | return list; | |
9239 | ||
c2255bc4 | 9240 | c = build_omp_clause (loc, OMP_CLAUSE_SCHEDULE); |
953ff289 DN |
9241 | |
9242 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
9243 | { | |
9244 | tree kind = c_parser_peek_token (parser)->value; | |
9245 | const char *p = IDENTIFIER_POINTER (kind); | |
9246 | ||
9247 | switch (p[0]) | |
9248 | { | |
9249 | case 'd': | |
9250 | if (strcmp ("dynamic", p) != 0) | |
9251 | goto invalid_kind; | |
9252 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC; | |
9253 | break; | |
9254 | ||
9255 | case 'g': | |
9256 | if (strcmp ("guided", p) != 0) | |
9257 | goto invalid_kind; | |
9258 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED; | |
9259 | break; | |
9260 | ||
9261 | case 'r': | |
9262 | if (strcmp ("runtime", p) != 0) | |
9263 | goto invalid_kind; | |
9264 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME; | |
9265 | break; | |
9266 | ||
9267 | default: | |
9268 | goto invalid_kind; | |
9269 | } | |
9270 | } | |
9271 | else if (c_parser_next_token_is_keyword (parser, RID_STATIC)) | |
9272 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC; | |
a68ab351 JJ |
9273 | else if (c_parser_next_token_is_keyword (parser, RID_AUTO)) |
9274 | OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO; | |
953ff289 DN |
9275 | else |
9276 | goto invalid_kind; | |
9277 | ||
9278 | c_parser_consume_token (parser); | |
9279 | if (c_parser_next_token_is (parser, CPP_COMMA)) | |
9280 | { | |
c7412148 | 9281 | location_t here; |
953ff289 DN |
9282 | c_parser_consume_token (parser); |
9283 | ||
c7412148 | 9284 | here = c_parser_peek_token (parser)->location; |
953ff289 | 9285 | t = c_parser_expr_no_commas (parser, NULL).value; |
7d1362bc | 9286 | mark_exp_read (t); |
928c19bb | 9287 | t = c_fully_fold (t, false, NULL); |
953ff289 DN |
9288 | |
9289 | if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME) | |
3ba09659 AH |
9290 | error_at (here, "schedule %<runtime%> does not take " |
9291 | "a %<chunk_size%> parameter"); | |
a68ab351 | 9292 | else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO) |
3ba09659 AH |
9293 | error_at (here, |
9294 | "schedule %<auto%> does not take " | |
9295 | "a %<chunk_size%> parameter"); | |
953ff289 DN |
9296 | else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE) |
9297 | OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t; | |
9298 | else | |
9299 | c_parser_error (parser, "expected integer expression"); | |
9300 | ||
9301 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9302 | } | |
9303 | else | |
9304 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
9305 | "expected %<,%> or %<)%>"); | |
9306 | ||
9307 | check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule"); | |
9308 | OMP_CLAUSE_CHAIN (c) = list; | |
9309 | return c; | |
9310 | ||
9311 | invalid_kind: | |
9312 | c_parser_error (parser, "invalid schedule kind"); | |
9313 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0); | |
9314 | return list; | |
9315 | } | |
9316 | ||
9317 | /* OpenMP 2.5: | |
9318 | shared ( variable-list ) */ | |
9319 | ||
9320 | static tree | |
9321 | c_parser_omp_clause_shared (c_parser *parser, tree list) | |
9322 | { | |
9323 | return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list); | |
9324 | } | |
9325 | ||
a68ab351 JJ |
9326 | /* OpenMP 3.0: |
9327 | untied */ | |
9328 | ||
9329 | static tree | |
9330 | c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list) | |
9331 | { | |
9332 | tree c; | |
9333 | ||
9334 | /* FIXME: Should we allow duplicates? */ | |
9335 | check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied"); | |
9336 | ||
c2255bc4 AH |
9337 | c = build_omp_clause (c_parser_peek_token (parser)->location, |
9338 | OMP_CLAUSE_UNTIED); | |
a68ab351 | 9339 | OMP_CLAUSE_CHAIN (c) = list; |
c2255bc4 | 9340 | |
a68ab351 JJ |
9341 | return c; |
9342 | } | |
9343 | ||
953ff289 DN |
9344 | /* Parse all OpenMP clauses. The set clauses allowed by the directive |
9345 | is a bitmask in MASK. Return the list of clauses found; the result | |
9346 | of clause default goes in *pdefault. */ | |
9347 | ||
9348 | static tree | |
9349 | c_parser_omp_all_clauses (c_parser *parser, unsigned int mask, | |
9350 | const char *where) | |
9351 | { | |
9352 | tree clauses = NULL; | |
8085ca15 | 9353 | bool first = true; |
953ff289 DN |
9354 | |
9355 | while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
9356 | { | |
8085ca15 JJ |
9357 | location_t here; |
9358 | pragma_omp_clause c_kind; | |
953ff289 DN |
9359 | const char *c_name; |
9360 | tree prev = clauses; | |
9361 | ||
8085ca15 JJ |
9362 | if (!first && c_parser_next_token_is (parser, CPP_COMMA)) |
9363 | c_parser_consume_token (parser); | |
9364 | ||
9365 | first = false; | |
9366 | here = c_parser_peek_token (parser)->location; | |
9367 | c_kind = c_parser_omp_clause_name (parser); | |
9368 | ||
953ff289 DN |
9369 | switch (c_kind) |
9370 | { | |
a68ab351 JJ |
9371 | case PRAGMA_OMP_CLAUSE_COLLAPSE: |
9372 | clauses = c_parser_omp_clause_collapse (parser, clauses); | |
9373 | c_name = "collapse"; | |
9374 | break; | |
953ff289 DN |
9375 | case PRAGMA_OMP_CLAUSE_COPYIN: |
9376 | clauses = c_parser_omp_clause_copyin (parser, clauses); | |
9377 | c_name = "copyin"; | |
9378 | break; | |
9379 | case PRAGMA_OMP_CLAUSE_COPYPRIVATE: | |
9380 | clauses = c_parser_omp_clause_copyprivate (parser, clauses); | |
9381 | c_name = "copyprivate"; | |
9382 | break; | |
9383 | case PRAGMA_OMP_CLAUSE_DEFAULT: | |
9384 | clauses = c_parser_omp_clause_default (parser, clauses); | |
9385 | c_name = "default"; | |
9386 | break; | |
9387 | case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE: | |
9388 | clauses = c_parser_omp_clause_firstprivate (parser, clauses); | |
9389 | c_name = "firstprivate"; | |
9390 | break; | |
20906c66 JJ |
9391 | case PRAGMA_OMP_CLAUSE_FINAL: |
9392 | clauses = c_parser_omp_clause_final (parser, clauses); | |
9393 | c_name = "final"; | |
9394 | break; | |
953ff289 DN |
9395 | case PRAGMA_OMP_CLAUSE_IF: |
9396 | clauses = c_parser_omp_clause_if (parser, clauses); | |
9397 | c_name = "if"; | |
9398 | break; | |
9399 | case PRAGMA_OMP_CLAUSE_LASTPRIVATE: | |
9400 | clauses = c_parser_omp_clause_lastprivate (parser, clauses); | |
9401 | c_name = "lastprivate"; | |
9402 | break; | |
20906c66 JJ |
9403 | case PRAGMA_OMP_CLAUSE_MERGEABLE: |
9404 | clauses = c_parser_omp_clause_mergeable (parser, clauses); | |
9405 | c_name = "mergeable"; | |
9406 | break; | |
953ff289 DN |
9407 | case PRAGMA_OMP_CLAUSE_NOWAIT: |
9408 | clauses = c_parser_omp_clause_nowait (parser, clauses); | |
9409 | c_name = "nowait"; | |
9410 | break; | |
9411 | case PRAGMA_OMP_CLAUSE_NUM_THREADS: | |
9412 | clauses = c_parser_omp_clause_num_threads (parser, clauses); | |
9413 | c_name = "num_threads"; | |
9414 | break; | |
9415 | case PRAGMA_OMP_CLAUSE_ORDERED: | |
9416 | clauses = c_parser_omp_clause_ordered (parser, clauses); | |
9417 | c_name = "ordered"; | |
9418 | break; | |
9419 | case PRAGMA_OMP_CLAUSE_PRIVATE: | |
9420 | clauses = c_parser_omp_clause_private (parser, clauses); | |
9421 | c_name = "private"; | |
9422 | break; | |
9423 | case PRAGMA_OMP_CLAUSE_REDUCTION: | |
9424 | clauses = c_parser_omp_clause_reduction (parser, clauses); | |
9425 | c_name = "reduction"; | |
9426 | break; | |
9427 | case PRAGMA_OMP_CLAUSE_SCHEDULE: | |
9428 | clauses = c_parser_omp_clause_schedule (parser, clauses); | |
9429 | c_name = "schedule"; | |
9430 | break; | |
9431 | case PRAGMA_OMP_CLAUSE_SHARED: | |
9432 | clauses = c_parser_omp_clause_shared (parser, clauses); | |
9433 | c_name = "shared"; | |
9434 | break; | |
a68ab351 JJ |
9435 | case PRAGMA_OMP_CLAUSE_UNTIED: |
9436 | clauses = c_parser_omp_clause_untied (parser, clauses); | |
9437 | c_name = "untied"; | |
9438 | break; | |
953ff289 DN |
9439 | default: |
9440 | c_parser_error (parser, "expected %<#pragma omp%> clause"); | |
9441 | goto saw_error; | |
9442 | } | |
9443 | ||
9444 | if (((mask >> c_kind) & 1) == 0 && !parser->error) | |
9445 | { | |
9446 | /* Remove the invalid clause(s) from the list to avoid | |
9447 | confusing the rest of the compiler. */ | |
9448 | clauses = prev; | |
3ba09659 | 9449 | error_at (here, "%qs is not valid for %qs", c_name, where); |
953ff289 DN |
9450 | } |
9451 | } | |
9452 | ||
9453 | saw_error: | |
9454 | c_parser_skip_to_pragma_eol (parser); | |
9455 | ||
9456 | return c_finish_omp_clauses (clauses); | |
9457 | } | |
9458 | ||
9459 | /* OpenMP 2.5: | |
9460 | structured-block: | |
9461 | statement | |
9462 | ||
9463 | In practice, we're also interested in adding the statement to an | |
9464 | outer node. So it is convenient if we work around the fact that | |
9465 | c_parser_statement calls add_stmt. */ | |
9466 | ||
9467 | static tree | |
9468 | c_parser_omp_structured_block (c_parser *parser) | |
9469 | { | |
9470 | tree stmt = push_stmt_list (); | |
9471 | c_parser_statement (parser); | |
9472 | return pop_stmt_list (stmt); | |
9473 | } | |
9474 | ||
9475 | /* OpenMP 2.5: | |
9476 | # pragma omp atomic new-line | |
9477 | expression-stmt | |
9478 | ||
9479 | expression-stmt: | |
9480 | x binop= expr | x++ | ++x | x-- | --x | |
9481 | binop: | |
9482 | +, *, -, /, &, ^, |, <<, >> | |
9483 | ||
b8698a0f | 9484 | where x is an lvalue expression with scalar type. |
c2255bc4 | 9485 | |
20906c66 JJ |
9486 | OpenMP 3.1: |
9487 | # pragma omp atomic new-line | |
9488 | update-stmt | |
9489 | ||
9490 | # pragma omp atomic read new-line | |
9491 | read-stmt | |
9492 | ||
9493 | # pragma omp atomic write new-line | |
9494 | write-stmt | |
9495 | ||
9496 | # pragma omp atomic update new-line | |
9497 | update-stmt | |
9498 | ||
9499 | # pragma omp atomic capture new-line | |
9500 | capture-stmt | |
9501 | ||
9502 | # pragma omp atomic capture new-line | |
9503 | capture-block | |
9504 | ||
9505 | read-stmt: | |
9506 | v = x | |
9507 | write-stmt: | |
9508 | x = expr | |
9509 | update-stmt: | |
9510 | expression-stmt | x = x binop expr | |
9511 | capture-stmt: | |
9512 | v = x binop= expr | v = x++ | v = ++x | v = x-- | v = --x | |
9513 | capture-block: | |
9514 | { v = x; update-stmt; } | { update-stmt; v = x; } | |
9515 | ||
9516 | where x and v are lvalue expressions with scalar type. | |
9517 | ||
c2255bc4 | 9518 | LOC is the location of the #pragma token. */ |
953ff289 DN |
9519 | |
9520 | static void | |
c2255bc4 | 9521 | c_parser_omp_atomic (location_t loc, c_parser *parser) |
953ff289 | 9522 | { |
20906c66 JJ |
9523 | tree lhs = NULL_TREE, rhs = NULL_TREE, v = NULL_TREE; |
9524 | tree lhs1 = NULL_TREE, rhs1 = NULL_TREE; | |
9525 | tree stmt, orig_lhs; | |
9526 | enum tree_code code = OMP_ATOMIC, opcode = NOP_EXPR; | |
79addd1f | 9527 | struct c_expr rhs_expr; |
20906c66 | 9528 | bool structured_block = false; |
953ff289 | 9529 | |
20906c66 JJ |
9530 | if (c_parser_next_token_is (parser, CPP_NAME)) |
9531 | { | |
9532 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
9533 | ||
9534 | if (!strcmp (p, "read")) | |
9535 | code = OMP_ATOMIC_READ; | |
9536 | else if (!strcmp (p, "write")) | |
9537 | code = NOP_EXPR; | |
9538 | else if (!strcmp (p, "update")) | |
9539 | code = OMP_ATOMIC; | |
9540 | else if (!strcmp (p, "capture")) | |
9541 | code = OMP_ATOMIC_CAPTURE_NEW; | |
9542 | else | |
9543 | p = NULL; | |
9544 | if (p) | |
9545 | c_parser_consume_token (parser); | |
9546 | } | |
953ff289 DN |
9547 | c_parser_skip_to_pragma_eol (parser); |
9548 | ||
20906c66 JJ |
9549 | switch (code) |
9550 | { | |
9551 | case OMP_ATOMIC_READ: | |
9552 | case NOP_EXPR: /* atomic write */ | |
9553 | v = c_parser_unary_expression (parser).value; | |
9554 | v = c_fully_fold (v, false, NULL); | |
9555 | if (v == error_mark_node) | |
9556 | goto saw_error; | |
9557 | loc = c_parser_peek_token (parser)->location; | |
9558 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9559 | goto saw_error; | |
9560 | if (code == NOP_EXPR) | |
9561 | lhs = c_parser_expression (parser).value; | |
9562 | else | |
9563 | lhs = c_parser_unary_expression (parser).value; | |
9564 | lhs = c_fully_fold (lhs, false, NULL); | |
9565 | if (lhs == error_mark_node) | |
9566 | goto saw_error; | |
9567 | if (code == NOP_EXPR) | |
9568 | { | |
9569 | /* atomic write is represented by OMP_ATOMIC with NOP_EXPR | |
9570 | opcode. */ | |
9571 | code = OMP_ATOMIC; | |
9572 | rhs = lhs; | |
9573 | lhs = v; | |
9574 | v = NULL_TREE; | |
9575 | } | |
9576 | goto done; | |
9577 | case OMP_ATOMIC_CAPTURE_NEW: | |
9578 | if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
9579 | { | |
9580 | c_parser_consume_token (parser); | |
9581 | structured_block = true; | |
9582 | } | |
9583 | else | |
9584 | { | |
9585 | v = c_parser_unary_expression (parser).value; | |
9586 | v = c_fully_fold (v, false, NULL); | |
9587 | if (v == error_mark_node) | |
9588 | goto saw_error; | |
9589 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9590 | goto saw_error; | |
9591 | } | |
9592 | break; | |
9593 | default: | |
9594 | break; | |
9595 | } | |
9596 | ||
9597 | /* For structured_block case we don't know yet whether | |
9598 | old or new x should be captured. */ | |
9599 | restart: | |
953ff289 | 9600 | lhs = c_parser_unary_expression (parser).value; |
928c19bb | 9601 | lhs = c_fully_fold (lhs, false, NULL); |
20906c66 | 9602 | orig_lhs = lhs; |
953ff289 DN |
9603 | switch (TREE_CODE (lhs)) |
9604 | { | |
9605 | case ERROR_MARK: | |
9606 | saw_error: | |
9607 | c_parser_skip_to_end_of_block_or_statement (parser); | |
20906c66 JJ |
9608 | if (structured_block) |
9609 | { | |
9610 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
9611 | c_parser_consume_token (parser); | |
9612 | else if (code == OMP_ATOMIC_CAPTURE_NEW) | |
9613 | { | |
9614 | c_parser_skip_to_end_of_block_or_statement (parser); | |
9615 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
9616 | c_parser_consume_token (parser); | |
9617 | } | |
9618 | } | |
953ff289 DN |
9619 | return; |
9620 | ||
953ff289 | 9621 | case POSTINCREMENT_EXPR: |
20906c66 JJ |
9622 | if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block) |
9623 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9624 | /* FALLTHROUGH */ | |
9625 | case PREINCREMENT_EXPR: | |
953ff289 | 9626 | lhs = TREE_OPERAND (lhs, 0); |
20906c66 | 9627 | opcode = PLUS_EXPR; |
953ff289 DN |
9628 | rhs = integer_one_node; |
9629 | break; | |
9630 | ||
953ff289 | 9631 | case POSTDECREMENT_EXPR: |
20906c66 JJ |
9632 | if (code == OMP_ATOMIC_CAPTURE_NEW && !structured_block) |
9633 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9634 | /* FALLTHROUGH */ | |
9635 | case PREDECREMENT_EXPR: | |
953ff289 | 9636 | lhs = TREE_OPERAND (lhs, 0); |
20906c66 | 9637 | opcode = MINUS_EXPR; |
953ff289 DN |
9638 | rhs = integer_one_node; |
9639 | break; | |
9640 | ||
f2b11865 JJ |
9641 | case COMPOUND_EXPR: |
9642 | if (TREE_CODE (TREE_OPERAND (lhs, 0)) == SAVE_EXPR | |
9643 | && TREE_CODE (TREE_OPERAND (lhs, 1)) == COMPOUND_EXPR | |
9644 | && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) == MODIFY_EXPR | |
9645 | && TREE_OPERAND (TREE_OPERAND (lhs, 1), 1) == TREE_OPERAND (lhs, 0) | |
9646 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND | |
9647 | (TREE_OPERAND (lhs, 1), 0), 0))) | |
9648 | == BOOLEAN_TYPE) | |
9649 | /* Undo effects of boolean_increment for post {in,de}crement. */ | |
9650 | lhs = TREE_OPERAND (TREE_OPERAND (lhs, 1), 0); | |
9651 | /* FALLTHRU */ | |
9652 | case MODIFY_EXPR: | |
9653 | if (TREE_CODE (lhs) == MODIFY_EXPR | |
9654 | && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs, 0))) == BOOLEAN_TYPE) | |
9655 | { | |
9656 | /* Undo effects of boolean_increment. */ | |
9657 | if (integer_onep (TREE_OPERAND (lhs, 1))) | |
9658 | { | |
9659 | /* This is pre or post increment. */ | |
9660 | rhs = TREE_OPERAND (lhs, 1); | |
9661 | lhs = TREE_OPERAND (lhs, 0); | |
20906c66 JJ |
9662 | opcode = NOP_EXPR; |
9663 | if (code == OMP_ATOMIC_CAPTURE_NEW | |
9664 | && !structured_block | |
9665 | && TREE_CODE (orig_lhs) == COMPOUND_EXPR) | |
9666 | code = OMP_ATOMIC_CAPTURE_OLD; | |
f2b11865 JJ |
9667 | break; |
9668 | } | |
9669 | if (TREE_CODE (TREE_OPERAND (lhs, 1)) == TRUTH_NOT_EXPR | |
9670 | && TREE_OPERAND (lhs, 0) | |
9671 | == TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) | |
9672 | { | |
9673 | /* This is pre or post decrement. */ | |
9674 | rhs = TREE_OPERAND (lhs, 1); | |
9675 | lhs = TREE_OPERAND (lhs, 0); | |
20906c66 JJ |
9676 | opcode = NOP_EXPR; |
9677 | if (code == OMP_ATOMIC_CAPTURE_NEW | |
9678 | && !structured_block | |
9679 | && TREE_CODE (orig_lhs) == COMPOUND_EXPR) | |
9680 | code = OMP_ATOMIC_CAPTURE_OLD; | |
f2b11865 JJ |
9681 | break; |
9682 | } | |
9683 | } | |
9684 | /* FALLTHRU */ | |
953ff289 DN |
9685 | default: |
9686 | switch (c_parser_peek_token (parser)->type) | |
9687 | { | |
9688 | case CPP_MULT_EQ: | |
20906c66 | 9689 | opcode = MULT_EXPR; |
953ff289 DN |
9690 | break; |
9691 | case CPP_DIV_EQ: | |
20906c66 | 9692 | opcode = TRUNC_DIV_EXPR; |
953ff289 DN |
9693 | break; |
9694 | case CPP_PLUS_EQ: | |
20906c66 | 9695 | opcode = PLUS_EXPR; |
953ff289 DN |
9696 | break; |
9697 | case CPP_MINUS_EQ: | |
20906c66 | 9698 | opcode = MINUS_EXPR; |
953ff289 DN |
9699 | break; |
9700 | case CPP_LSHIFT_EQ: | |
20906c66 | 9701 | opcode = LSHIFT_EXPR; |
953ff289 DN |
9702 | break; |
9703 | case CPP_RSHIFT_EQ: | |
20906c66 | 9704 | opcode = RSHIFT_EXPR; |
953ff289 DN |
9705 | break; |
9706 | case CPP_AND_EQ: | |
20906c66 | 9707 | opcode = BIT_AND_EXPR; |
953ff289 DN |
9708 | break; |
9709 | case CPP_OR_EQ: | |
20906c66 | 9710 | opcode = BIT_IOR_EXPR; |
953ff289 DN |
9711 | break; |
9712 | case CPP_XOR_EQ: | |
20906c66 | 9713 | opcode = BIT_XOR_EXPR; |
953ff289 | 9714 | break; |
20906c66 JJ |
9715 | case CPP_EQ: |
9716 | if (structured_block || code == OMP_ATOMIC) | |
9717 | { | |
9718 | location_t aloc = c_parser_peek_token (parser)->location; | |
9719 | location_t rhs_loc; | |
9720 | enum c_parser_prec oprec = PREC_NONE; | |
9721 | ||
9722 | c_parser_consume_token (parser); | |
9723 | rhs1 = c_parser_unary_expression (parser).value; | |
9724 | rhs1 = c_fully_fold (rhs1, false, NULL); | |
9725 | if (rhs1 == error_mark_node) | |
9726 | goto saw_error; | |
9727 | switch (c_parser_peek_token (parser)->type) | |
9728 | { | |
9729 | case CPP_SEMICOLON: | |
9730 | if (code == OMP_ATOMIC_CAPTURE_NEW) | |
9731 | { | |
9732 | code = OMP_ATOMIC_CAPTURE_OLD; | |
9733 | v = lhs; | |
9734 | lhs = NULL_TREE; | |
9735 | lhs1 = rhs1; | |
9736 | rhs1 = NULL_TREE; | |
9737 | c_parser_consume_token (parser); | |
9738 | goto restart; | |
9739 | } | |
9740 | c_parser_error (parser, | |
9741 | "invalid form of %<#pragma omp atomic%>"); | |
9742 | goto saw_error; | |
9743 | case CPP_MULT: | |
9744 | opcode = MULT_EXPR; | |
9745 | oprec = PREC_MULT; | |
9746 | break; | |
9747 | case CPP_DIV: | |
9748 | opcode = TRUNC_DIV_EXPR; | |
9749 | oprec = PREC_MULT; | |
9750 | break; | |
9751 | case CPP_PLUS: | |
9752 | opcode = PLUS_EXPR; | |
9753 | oprec = PREC_ADD; | |
9754 | break; | |
9755 | case CPP_MINUS: | |
9756 | opcode = MINUS_EXPR; | |
9757 | oprec = PREC_ADD; | |
9758 | break; | |
9759 | case CPP_LSHIFT: | |
9760 | opcode = LSHIFT_EXPR; | |
9761 | oprec = PREC_SHIFT; | |
9762 | break; | |
9763 | case CPP_RSHIFT: | |
9764 | opcode = RSHIFT_EXPR; | |
9765 | oprec = PREC_SHIFT; | |
9766 | break; | |
9767 | case CPP_AND: | |
9768 | opcode = BIT_AND_EXPR; | |
9769 | oprec = PREC_BITAND; | |
9770 | break; | |
9771 | case CPP_OR: | |
9772 | opcode = BIT_IOR_EXPR; | |
9773 | oprec = PREC_BITOR; | |
9774 | break; | |
9775 | case CPP_XOR: | |
9776 | opcode = BIT_XOR_EXPR; | |
9777 | oprec = PREC_BITXOR; | |
9778 | break; | |
9779 | default: | |
9780 | c_parser_error (parser, | |
9781 | "invalid operator for %<#pragma omp atomic%>"); | |
9782 | goto saw_error; | |
9783 | } | |
9784 | loc = aloc; | |
9785 | c_parser_consume_token (parser); | |
9786 | rhs_loc = c_parser_peek_token (parser)->location; | |
9787 | if (commutative_tree_code (opcode)) | |
9788 | oprec = (enum c_parser_prec) (oprec - 1); | |
9789 | rhs_expr = c_parser_binary_expression (parser, NULL, oprec); | |
9790 | rhs_expr = default_function_array_read_conversion (rhs_loc, | |
9791 | rhs_expr); | |
9792 | rhs = rhs_expr.value; | |
9793 | rhs = c_fully_fold (rhs, false, NULL); | |
9794 | goto stmt_done; | |
9795 | } | |
9796 | /* FALLTHROUGH */ | |
953ff289 DN |
9797 | default: |
9798 | c_parser_error (parser, | |
9799 | "invalid operator for %<#pragma omp atomic%>"); | |
9800 | goto saw_error; | |
9801 | } | |
9802 | ||
7bd11157 TT |
9803 | /* Arrange to pass the location of the assignment operator to |
9804 | c_finish_omp_atomic. */ | |
9805 | loc = c_parser_peek_token (parser)->location; | |
953ff289 | 9806 | c_parser_consume_token (parser); |
c2255bc4 AH |
9807 | { |
9808 | location_t rhs_loc = c_parser_peek_token (parser)->location; | |
9809 | rhs_expr = c_parser_expression (parser); | |
ebfbbdc5 | 9810 | rhs_expr = default_function_array_read_conversion (rhs_loc, rhs_expr); |
c2255bc4 | 9811 | } |
79addd1f | 9812 | rhs = rhs_expr.value; |
928c19bb | 9813 | rhs = c_fully_fold (rhs, false, NULL); |
953ff289 DN |
9814 | break; |
9815 | } | |
20906c66 JJ |
9816 | stmt_done: |
9817 | if (structured_block && code == OMP_ATOMIC_CAPTURE_NEW) | |
9818 | { | |
9819 | if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>")) | |
9820 | goto saw_error; | |
9821 | v = c_parser_unary_expression (parser).value; | |
9822 | v = c_fully_fold (v, false, NULL); | |
9823 | if (v == error_mark_node) | |
9824 | goto saw_error; | |
9825 | if (!c_parser_require (parser, CPP_EQ, "expected %<=%>")) | |
9826 | goto saw_error; | |
9827 | lhs1 = c_parser_unary_expression (parser).value; | |
9828 | lhs1 = c_fully_fold (lhs1, false, NULL); | |
9829 | if (lhs1 == error_mark_node) | |
9830 | goto saw_error; | |
9831 | } | |
9832 | if (structured_block) | |
9833 | { | |
9834 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
9835 | c_parser_require (parser, CPP_CLOSE_BRACE, "expected %<}%>"); | |
9836 | } | |
9837 | done: | |
9838 | stmt = c_finish_omp_atomic (loc, code, opcode, lhs, rhs, v, lhs1, rhs1); | |
fe89d797 MM |
9839 | if (stmt != error_mark_node) |
9840 | add_stmt (stmt); | |
20906c66 JJ |
9841 | |
9842 | if (!structured_block) | |
9843 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); | |
953ff289 DN |
9844 | } |
9845 | ||
9846 | ||
9847 | /* OpenMP 2.5: | |
9848 | # pragma omp barrier new-line | |
9849 | */ | |
9850 | ||
9851 | static void | |
9852 | c_parser_omp_barrier (c_parser *parser) | |
9853 | { | |
c2255bc4 | 9854 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9855 | c_parser_consume_pragma (parser); |
9856 | c_parser_skip_to_pragma_eol (parser); | |
9857 | ||
c2255bc4 | 9858 | c_finish_omp_barrier (loc); |
953ff289 DN |
9859 | } |
9860 | ||
9861 | /* OpenMP 2.5: | |
9862 | # pragma omp critical [(name)] new-line | |
9863 | structured-block | |
c2255bc4 AH |
9864 | |
9865 | LOC is the location of the #pragma itself. */ | |
953ff289 DN |
9866 | |
9867 | static tree | |
c2255bc4 | 9868 | c_parser_omp_critical (location_t loc, c_parser *parser) |
953ff289 DN |
9869 | { |
9870 | tree stmt, name = NULL; | |
9871 | ||
9872 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
9873 | { | |
9874 | c_parser_consume_token (parser); | |
9875 | if (c_parser_next_token_is (parser, CPP_NAME)) | |
9876 | { | |
9877 | name = c_parser_peek_token (parser)->value; | |
9878 | c_parser_consume_token (parser); | |
9879 | c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"); | |
9880 | } | |
9881 | else | |
9882 | c_parser_error (parser, "expected identifier"); | |
9883 | } | |
9884 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) | |
9885 | c_parser_error (parser, "expected %<(%> or end of line"); | |
9886 | c_parser_skip_to_pragma_eol (parser); | |
9887 | ||
9888 | stmt = c_parser_omp_structured_block (parser); | |
c2255bc4 | 9889 | return c_finish_omp_critical (loc, stmt, name); |
953ff289 DN |
9890 | } |
9891 | ||
9892 | /* OpenMP 2.5: | |
9893 | # pragma omp flush flush-vars[opt] new-line | |
9894 | ||
9895 | flush-vars: | |
9896 | ( variable-list ) */ | |
9897 | ||
9898 | static void | |
9899 | c_parser_omp_flush (c_parser *parser) | |
9900 | { | |
c2255bc4 | 9901 | location_t loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9902 | c_parser_consume_pragma (parser); |
9903 | if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)) | |
d75d71e0 | 9904 | c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 DN |
9905 | else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL)) |
9906 | c_parser_error (parser, "expected %<(%> or end of line"); | |
9907 | c_parser_skip_to_pragma_eol (parser); | |
9908 | ||
c2255bc4 | 9909 | c_finish_omp_flush (loc); |
953ff289 DN |
9910 | } |
9911 | ||
fa10beec | 9912 | /* Parse the restricted form of the for statement allowed by OpenMP. |
953ff289 | 9913 | The real trick here is to determine the loop control variable early |
c2255bc4 AH |
9914 | so that we can push a new decl if necessary to make it private. |
9915 | LOC is the location of the OMP in "#pragma omp". */ | |
953ff289 DN |
9916 | |
9917 | static tree | |
c2255bc4 AH |
9918 | c_parser_omp_for_loop (location_t loc, |
9919 | c_parser *parser, tree clauses, tree *par_clauses) | |
953ff289 | 9920 | { |
a68ab351 | 9921 | tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl; |
1d468b06 | 9922 | tree declv, condv, incrv, initv, ret = NULL; |
a68ab351 JJ |
9923 | bool fail = false, open_brace_parsed = false; |
9924 | int i, collapse = 1, nbraces = 0; | |
c2255bc4 | 9925 | location_t for_loc; |
1d468b06 | 9926 | VEC(tree,gc) *for_block = make_tree_vector (); |
a68ab351 JJ |
9927 | |
9928 | for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl)) | |
9929 | if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE) | |
9930 | collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0); | |
9931 | ||
9932 | gcc_assert (collapse >= 1); | |
9933 | ||
9934 | declv = make_tree_vec (collapse); | |
9935 | initv = make_tree_vec (collapse); | |
9936 | condv = make_tree_vec (collapse); | |
9937 | incrv = make_tree_vec (collapse); | |
953ff289 DN |
9938 | |
9939 | if (!c_parser_next_token_is_keyword (parser, RID_FOR)) | |
9940 | { | |
9941 | c_parser_error (parser, "for statement expected"); | |
9942 | return NULL; | |
9943 | } | |
c2255bc4 | 9944 | for_loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
9945 | c_parser_consume_token (parser); |
9946 | ||
a68ab351 | 9947 | for (i = 0; i < collapse; i++) |
953ff289 | 9948 | { |
a68ab351 | 9949 | int bracecount = 0; |
953ff289 | 9950 | |
a68ab351 JJ |
9951 | if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
9952 | goto pop_scopes; | |
953ff289 | 9953 | |
a68ab351 | 9954 | /* Parse the initialization declaration or expression. */ |
2f413185 | 9955 | if (c_parser_next_tokens_start_declaration (parser)) |
a68ab351 JJ |
9956 | { |
9957 | if (i > 0) | |
1d468b06 | 9958 | VEC_safe_push (tree, gc, for_block, c_begin_compound_stmt (true)); |
f05b9d93 NP |
9959 | c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL); |
9960 | decl = check_for_loop_decls (for_loc, flag_isoc99); | |
a68ab351 JJ |
9961 | if (decl == NULL) |
9962 | goto error_init; | |
9963 | if (DECL_INITIAL (decl) == error_mark_node) | |
9964 | decl = error_mark_node; | |
9965 | init = decl; | |
9966 | } | |
9967 | else if (c_parser_next_token_is (parser, CPP_NAME) | |
9968 | && c_parser_peek_2nd_token (parser)->type == CPP_EQ) | |
9969 | { | |
32e8bb8e | 9970 | struct c_expr decl_exp; |
a68ab351 | 9971 | struct c_expr init_exp; |
c9f9eb5d | 9972 | location_t init_loc; |
a68ab351 | 9973 | |
32e8bb8e ILT |
9974 | decl_exp = c_parser_postfix_expression (parser); |
9975 | decl = decl_exp.value; | |
a68ab351 JJ |
9976 | |
9977 | c_parser_require (parser, CPP_EQ, "expected %<=%>"); | |
9978 | ||
c2255bc4 | 9979 | init_loc = c_parser_peek_token (parser)->location; |
a68ab351 | 9980 | init_exp = c_parser_expr_no_commas (parser, NULL); |
ebfbbdc5 JJ |
9981 | init_exp = default_function_array_read_conversion (init_loc, |
9982 | init_exp); | |
32e8bb8e | 9983 | init = build_modify_expr (init_loc, decl, decl_exp.original_type, |
c2255bc4 | 9984 | NOP_EXPR, init_loc, init_exp.value, |
bbbbb16a | 9985 | init_exp.original_type); |
c2255bc4 | 9986 | init = c_process_expr_stmt (init_loc, init); |
953ff289 | 9987 | |
a68ab351 JJ |
9988 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
9989 | } | |
9990 | else | |
9991 | { | |
9992 | error_init: | |
9993 | c_parser_error (parser, | |
9994 | "expected iteration declaration or initialization"); | |
9995 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, | |
9996 | "expected %<)%>"); | |
9997 | fail = true; | |
9998 | goto parse_next; | |
9999 | } | |
10000 | ||
10001 | /* Parse the loop condition. */ | |
10002 | cond = NULL_TREE; | |
10003 | if (c_parser_next_token_is_not (parser, CPP_SEMICOLON)) | |
10004 | { | |
3ba09659 | 10005 | location_t cond_loc = c_parser_peek_token (parser)->location; |
20906c66 JJ |
10006 | struct c_expr cond_expr = c_parser_binary_expression (parser, NULL, |
10007 | PREC_NONE); | |
3ba09659 | 10008 | |
c5cdb03f | 10009 | cond = cond_expr.value; |
3ba09659 | 10010 | cond = c_objc_common_truthvalue_conversion (cond_loc, cond); |
928c19bb | 10011 | cond = c_fully_fold (cond, false, NULL); |
c5cdb03f JJ |
10012 | switch (cond_expr.original_code) |
10013 | { | |
10014 | case GT_EXPR: | |
10015 | case GE_EXPR: | |
10016 | case LT_EXPR: | |
10017 | case LE_EXPR: | |
10018 | break; | |
10019 | default: | |
10020 | /* Can't be cond = error_mark_node, because we want to preserve | |
10021 | the location until c_finish_omp_for. */ | |
10022 | cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node); | |
10023 | break; | |
10024 | } | |
c9f9eb5d | 10025 | protected_set_expr_location (cond, cond_loc); |
a68ab351 | 10026 | } |
953ff289 | 10027 | c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>"); |
953ff289 | 10028 | |
a68ab351 JJ |
10029 | /* Parse the increment expression. */ |
10030 | incr = NULL_TREE; | |
10031 | if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)) | |
c9f9eb5d AH |
10032 | { |
10033 | location_t incr_loc = c_parser_peek_token (parser)->location; | |
10034 | ||
c2255bc4 AH |
10035 | incr = c_process_expr_stmt (incr_loc, |
10036 | c_parser_expression (parser).value); | |
c9f9eb5d | 10037 | } |
a68ab351 | 10038 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>"); |
953ff289 | 10039 | |
a68ab351 JJ |
10040 | if (decl == NULL || decl == error_mark_node || init == error_mark_node) |
10041 | fail = true; | |
10042 | else | |
10043 | { | |
10044 | TREE_VEC_ELT (declv, i) = decl; | |
10045 | TREE_VEC_ELT (initv, i) = init; | |
10046 | TREE_VEC_ELT (condv, i) = cond; | |
10047 | TREE_VEC_ELT (incrv, i) = incr; | |
10048 | } | |
10049 | ||
10050 | parse_next: | |
10051 | if (i == collapse - 1) | |
10052 | break; | |
10053 | ||
10054 | /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed | |
10055 | in between the collapsed for loops to be still considered perfectly | |
10056 | nested. Hopefully the final version clarifies this. | |
10057 | For now handle (multiple) {'s and empty statements. */ | |
10058 | do | |
10059 | { | |
10060 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
10061 | { | |
10062 | c_parser_consume_token (parser); | |
10063 | break; | |
10064 | } | |
10065 | else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE)) | |
10066 | { | |
10067 | c_parser_consume_token (parser); | |
10068 | bracecount++; | |
10069 | } | |
10070 | else if (bracecount | |
10071 | && c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
10072 | c_parser_consume_token (parser); | |
10073 | else | |
10074 | { | |
10075 | c_parser_error (parser, "not enough perfectly nested loops"); | |
10076 | if (bracecount) | |
10077 | { | |
10078 | open_brace_parsed = true; | |
10079 | bracecount--; | |
10080 | } | |
10081 | fail = true; | |
10082 | collapse = 0; | |
10083 | break; | |
10084 | } | |
10085 | } | |
10086 | while (1); | |
10087 | ||
10088 | nbraces += bracecount; | |
10089 | } | |
953ff289 | 10090 | |
953ff289 DN |
10091 | save_break = c_break_label; |
10092 | c_break_label = size_one_node; | |
10093 | save_cont = c_cont_label; | |
10094 | c_cont_label = NULL_TREE; | |
10095 | body = push_stmt_list (); | |
10096 | ||
a68ab351 JJ |
10097 | if (open_brace_parsed) |
10098 | { | |
c2255bc4 | 10099 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
10100 | stmt = c_begin_compound_stmt (true); |
10101 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 10102 | add_stmt (c_end_compound_stmt (here, stmt, true)); |
a68ab351 JJ |
10103 | } |
10104 | else | |
10105 | add_stmt (c_parser_c99_block_statement (parser)); | |
953ff289 | 10106 | if (c_cont_label) |
c2255bc4 AH |
10107 | { |
10108 | tree t = build1 (LABEL_EXPR, void_type_node, c_cont_label); | |
10109 | SET_EXPR_LOCATION (t, loc); | |
10110 | add_stmt (t); | |
10111 | } | |
953ff289 DN |
10112 | |
10113 | body = pop_stmt_list (body); | |
10114 | c_break_label = save_break; | |
10115 | c_cont_label = save_cont; | |
10116 | ||
a68ab351 JJ |
10117 | while (nbraces) |
10118 | { | |
10119 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10120 | { | |
10121 | c_parser_consume_token (parser); | |
10122 | nbraces--; | |
10123 | } | |
10124 | else if (c_parser_next_token_is (parser, CPP_SEMICOLON)) | |
10125 | c_parser_consume_token (parser); | |
10126 | else | |
10127 | { | |
10128 | c_parser_error (parser, "collapsed loops not perfectly nested"); | |
10129 | while (nbraces) | |
10130 | { | |
c2255bc4 | 10131 | location_t here = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
10132 | stmt = c_begin_compound_stmt (true); |
10133 | add_stmt (body); | |
10134 | c_parser_compound_statement_nostart (parser); | |
c2255bc4 | 10135 | body = c_end_compound_stmt (here, stmt, true); |
a68ab351 JJ |
10136 | nbraces--; |
10137 | } | |
10138 | goto pop_scopes; | |
10139 | } | |
10140 | } | |
10141 | ||
61c3a446 | 10142 | /* Only bother calling c_finish_omp_for if we haven't already generated |
953ff289 | 10143 | an error from the initialization parsing. */ |
a68ab351 JJ |
10144 | if (!fail) |
10145 | { | |
10146 | stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL); | |
10147 | if (stmt) | |
10148 | { | |
10149 | if (par_clauses != NULL) | |
10150 | { | |
10151 | tree *c; | |
10152 | for (c = par_clauses; *c ; ) | |
10153 | if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE | |
10154 | && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE) | |
10155 | c = &OMP_CLAUSE_CHAIN (*c); | |
10156 | else | |
10157 | { | |
10158 | for (i = 0; i < collapse; i++) | |
10159 | if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c)) | |
10160 | break; | |
10161 | if (i == collapse) | |
10162 | c = &OMP_CLAUSE_CHAIN (*c); | |
10163 | else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE) | |
10164 | { | |
3ba09659 AH |
10165 | error_at (loc, |
10166 | "iteration variable %qD should not be firstprivate", | |
10167 | OMP_CLAUSE_DECL (*c)); | |
a68ab351 JJ |
10168 | *c = OMP_CLAUSE_CHAIN (*c); |
10169 | } | |
10170 | else | |
10171 | { | |
10172 | /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES, | |
10173 | change it to shared (decl) in | |
10174 | OMP_PARALLEL_CLAUSES. */ | |
c2255bc4 AH |
10175 | tree l = build_omp_clause (OMP_CLAUSE_LOCATION (*c), |
10176 | OMP_CLAUSE_LASTPRIVATE); | |
a68ab351 JJ |
10177 | OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c); |
10178 | OMP_CLAUSE_CHAIN (l) = clauses; | |
10179 | clauses = l; | |
10180 | OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED); | |
10181 | } | |
10182 | } | |
10183 | } | |
10184 | OMP_FOR_CLAUSES (stmt) = clauses; | |
10185 | } | |
10186 | ret = stmt; | |
10187 | } | |
10188 | pop_scopes: | |
1d468b06 | 10189 | while (!VEC_empty (tree, for_block)) |
a68ab351 | 10190 | { |
c2255bc4 AH |
10191 | /* FIXME diagnostics: LOC below should be the actual location of |
10192 | this particular for block. We need to build a list of | |
10193 | locations to go along with FOR_BLOCK. */ | |
1d468b06 | 10194 | stmt = c_end_compound_stmt (loc, VEC_pop (tree, for_block), true); |
a68ab351 | 10195 | add_stmt (stmt); |
a68ab351 | 10196 | } |
1d468b06 | 10197 | release_tree_vector (for_block); |
a68ab351 | 10198 | return ret; |
953ff289 DN |
10199 | } |
10200 | ||
10201 | /* OpenMP 2.5: | |
10202 | #pragma omp for for-clause[optseq] new-line | |
10203 | for-loop | |
c2255bc4 AH |
10204 | |
10205 | LOC is the location of the #pragma token. | |
953ff289 DN |
10206 | */ |
10207 | ||
10208 | #define OMP_FOR_CLAUSE_MASK \ | |
10209 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10210 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10211 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
10212 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10213 | | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \ | |
10214 | | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \ | |
a68ab351 | 10215 | | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \ |
953ff289 DN |
10216 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) |
10217 | ||
10218 | static tree | |
c2255bc4 | 10219 | c_parser_omp_for (location_t loc, c_parser *parser) |
953ff289 DN |
10220 | { |
10221 | tree block, clauses, ret; | |
10222 | ||
10223 | clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK, | |
10224 | "#pragma omp for"); | |
10225 | ||
10226 | block = c_begin_compound_stmt (true); | |
c2255bc4 AH |
10227 | ret = c_parser_omp_for_loop (loc, parser, clauses, NULL); |
10228 | block = c_end_compound_stmt (loc, block, true); | |
953ff289 DN |
10229 | add_stmt (block); |
10230 | ||
10231 | return ret; | |
10232 | } | |
10233 | ||
10234 | /* OpenMP 2.5: | |
10235 | # pragma omp master new-line | |
10236 | structured-block | |
c2255bc4 AH |
10237 | |
10238 | LOC is the location of the #pragma token. | |
953ff289 DN |
10239 | */ |
10240 | ||
10241 | static tree | |
c2255bc4 | 10242 | c_parser_omp_master (location_t loc, c_parser *parser) |
953ff289 DN |
10243 | { |
10244 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 10245 | return c_finish_omp_master (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
10246 | } |
10247 | ||
10248 | /* OpenMP 2.5: | |
10249 | # pragma omp ordered new-line | |
10250 | structured-block | |
c2255bc4 AH |
10251 | |
10252 | LOC is the location of the #pragma itself. | |
953ff289 DN |
10253 | */ |
10254 | ||
10255 | static tree | |
c2255bc4 | 10256 | c_parser_omp_ordered (location_t loc, c_parser *parser) |
953ff289 DN |
10257 | { |
10258 | c_parser_skip_to_pragma_eol (parser); | |
c2255bc4 | 10259 | return c_finish_omp_ordered (loc, c_parser_omp_structured_block (parser)); |
953ff289 DN |
10260 | } |
10261 | ||
10262 | /* OpenMP 2.5: | |
10263 | ||
10264 | section-scope: | |
10265 | { section-sequence } | |
10266 | ||
10267 | section-sequence: | |
10268 | section-directive[opt] structured-block | |
b8698a0f | 10269 | section-sequence section-directive structured-block |
c2255bc4 AH |
10270 | |
10271 | SECTIONS_LOC is the location of the #pragma omp sections. */ | |
953ff289 DN |
10272 | |
10273 | static tree | |
c2255bc4 | 10274 | c_parser_omp_sections_scope (location_t sections_loc, c_parser *parser) |
953ff289 DN |
10275 | { |
10276 | tree stmt, substmt; | |
10277 | bool error_suppress = false; | |
10278 | location_t loc; | |
10279 | ||
c2255bc4 | 10280 | loc = c_parser_peek_token (parser)->location; |
953ff289 DN |
10281 | if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>")) |
10282 | { | |
10283 | /* Avoid skipping until the end of the block. */ | |
10284 | parser->error = false; | |
10285 | return NULL_TREE; | |
10286 | } | |
10287 | ||
10288 | stmt = push_stmt_list (); | |
10289 | ||
953ff289 DN |
10290 | if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION) |
10291 | { | |
10292 | substmt = push_stmt_list (); | |
10293 | ||
10294 | while (1) | |
10295 | { | |
10296 | c_parser_statement (parser); | |
10297 | ||
10298 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
10299 | break; | |
10300 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10301 | break; | |
10302 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
10303 | break; | |
10304 | } | |
10305 | ||
10306 | substmt = pop_stmt_list (substmt); | |
10307 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
10308 | SET_EXPR_LOCATION (substmt, loc); | |
10309 | add_stmt (substmt); | |
10310 | } | |
10311 | ||
10312 | while (1) | |
10313 | { | |
10314 | if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE)) | |
10315 | break; | |
10316 | if (c_parser_next_token_is (parser, CPP_EOF)) | |
10317 | break; | |
10318 | ||
10319 | loc = c_parser_peek_token (parser)->location; | |
10320 | if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION) | |
10321 | { | |
10322 | c_parser_consume_pragma (parser); | |
10323 | c_parser_skip_to_pragma_eol (parser); | |
10324 | error_suppress = false; | |
10325 | } | |
10326 | else if (!error_suppress) | |
10327 | { | |
3ba09659 | 10328 | error_at (loc, "expected %<#pragma omp section%> or %<}%>"); |
953ff289 DN |
10329 | error_suppress = true; |
10330 | } | |
10331 | ||
10332 | substmt = c_parser_omp_structured_block (parser); | |
10333 | substmt = build1 (OMP_SECTION, void_type_node, substmt); | |
10334 | SET_EXPR_LOCATION (substmt, loc); | |
10335 | add_stmt (substmt); | |
10336 | } | |
10337 | c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, | |
10338 | "expected %<#pragma omp section%> or %<}%>"); | |
10339 | ||
10340 | substmt = pop_stmt_list (stmt); | |
10341 | ||
10342 | stmt = make_node (OMP_SECTIONS); | |
c2255bc4 | 10343 | SET_EXPR_LOCATION (stmt, sections_loc); |
953ff289 DN |
10344 | TREE_TYPE (stmt) = void_type_node; |
10345 | OMP_SECTIONS_BODY (stmt) = substmt; | |
10346 | ||
10347 | return add_stmt (stmt); | |
10348 | } | |
10349 | ||
10350 | /* OpenMP 2.5: | |
10351 | # pragma omp sections sections-clause[optseq] newline | |
10352 | sections-scope | |
c2255bc4 AH |
10353 | |
10354 | LOC is the location of the #pragma token. | |
953ff289 DN |
10355 | */ |
10356 | ||
10357 | #define OMP_SECTIONS_CLAUSE_MASK \ | |
10358 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10359 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10360 | | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \ | |
10361 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10362 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
10363 | ||
10364 | static tree | |
c2255bc4 | 10365 | c_parser_omp_sections (location_t loc, c_parser *parser) |
953ff289 DN |
10366 | { |
10367 | tree block, clauses, ret; | |
10368 | ||
10369 | clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK, | |
10370 | "#pragma omp sections"); | |
10371 | ||
10372 | block = c_begin_compound_stmt (true); | |
c2255bc4 | 10373 | ret = c_parser_omp_sections_scope (loc, parser); |
953ff289 DN |
10374 | if (ret) |
10375 | OMP_SECTIONS_CLAUSES (ret) = clauses; | |
c2255bc4 | 10376 | block = c_end_compound_stmt (loc, block, true); |
953ff289 DN |
10377 | add_stmt (block); |
10378 | ||
10379 | return ret; | |
10380 | } | |
10381 | ||
10382 | /* OpenMP 2.5: | |
10383 | # pragma parallel parallel-clause new-line | |
10384 | # pragma parallel for parallel-for-clause new-line | |
10385 | # pragma parallel sections parallel-sections-clause new-line | |
c2255bc4 AH |
10386 | |
10387 | LOC is the location of the #pragma token. | |
953ff289 DN |
10388 | */ |
10389 | ||
10390 | #define OMP_PARALLEL_CLAUSE_MASK \ | |
10391 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
10392 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10393 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10394 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
10395 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ | |
10396 | | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \ | |
10397 | | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \ | |
10398 | | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS)) | |
10399 | ||
10400 | static tree | |
c2255bc4 | 10401 | c_parser_omp_parallel (location_t loc, c_parser *parser) |
953ff289 DN |
10402 | { |
10403 | enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL; | |
10404 | const char *p_name = "#pragma omp parallel"; | |
10405 | tree stmt, clauses, par_clause, ws_clause, block; | |
10406 | unsigned int mask = OMP_PARALLEL_CLAUSE_MASK; | |
10407 | ||
10408 | if (c_parser_next_token_is_keyword (parser, RID_FOR)) | |
10409 | { | |
10410 | c_parser_consume_token (parser); | |
10411 | p_kind = PRAGMA_OMP_PARALLEL_FOR; | |
10412 | p_name = "#pragma omp parallel for"; | |
10413 | mask |= OMP_FOR_CLAUSE_MASK; | |
10414 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
10415 | } | |
10416 | else if (c_parser_next_token_is (parser, CPP_NAME)) | |
10417 | { | |
10418 | const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value); | |
10419 | if (strcmp (p, "sections") == 0) | |
10420 | { | |
10421 | c_parser_consume_token (parser); | |
10422 | p_kind = PRAGMA_OMP_PARALLEL_SECTIONS; | |
10423 | p_name = "#pragma omp parallel sections"; | |
10424 | mask |= OMP_SECTIONS_CLAUSE_MASK; | |
10425 | mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT); | |
10426 | } | |
10427 | } | |
10428 | ||
10429 | clauses = c_parser_omp_all_clauses (parser, mask, p_name); | |
10430 | ||
10431 | switch (p_kind) | |
10432 | { | |
10433 | case PRAGMA_OMP_PARALLEL: | |
10434 | block = c_begin_omp_parallel (); | |
10435 | c_parser_statement (parser); | |
c2255bc4 | 10436 | stmt = c_finish_omp_parallel (loc, clauses, block); |
953ff289 DN |
10437 | break; |
10438 | ||
10439 | case PRAGMA_OMP_PARALLEL_FOR: | |
10440 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
10441 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
10442 | c_parser_omp_for_loop (loc, parser, ws_clause, &par_clause); | |
10443 | stmt = c_finish_omp_parallel (loc, par_clause, block); | |
761041be | 10444 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
10445 | break; |
10446 | ||
10447 | case PRAGMA_OMP_PARALLEL_SECTIONS: | |
10448 | block = c_begin_omp_parallel (); | |
c2255bc4 AH |
10449 | c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause); |
10450 | stmt = c_parser_omp_sections_scope (loc, parser); | |
953ff289 DN |
10451 | if (stmt) |
10452 | OMP_SECTIONS_CLAUSES (stmt) = ws_clause; | |
c2255bc4 | 10453 | stmt = c_finish_omp_parallel (loc, par_clause, block); |
761041be | 10454 | OMP_PARALLEL_COMBINED (stmt) = 1; |
953ff289 DN |
10455 | break; |
10456 | ||
10457 | default: | |
10458 | gcc_unreachable (); | |
10459 | } | |
10460 | ||
10461 | return stmt; | |
10462 | } | |
10463 | ||
10464 | /* OpenMP 2.5: | |
10465 | # pragma omp single single-clause[optseq] new-line | |
10466 | structured-block | |
c2255bc4 AH |
10467 | |
10468 | LOC is the location of the #pragma. | |
953ff289 DN |
10469 | */ |
10470 | ||
10471 | #define OMP_SINGLE_CLAUSE_MASK \ | |
10472 | ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10473 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
10474 | | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \ | |
10475 | | (1u << PRAGMA_OMP_CLAUSE_NOWAIT)) | |
10476 | ||
10477 | static tree | |
c2255bc4 | 10478 | c_parser_omp_single (location_t loc, c_parser *parser) |
953ff289 DN |
10479 | { |
10480 | tree stmt = make_node (OMP_SINGLE); | |
c2255bc4 | 10481 | SET_EXPR_LOCATION (stmt, loc); |
953ff289 DN |
10482 | TREE_TYPE (stmt) = void_type_node; |
10483 | ||
10484 | OMP_SINGLE_CLAUSES (stmt) | |
10485 | = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK, | |
10486 | "#pragma omp single"); | |
10487 | OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser); | |
10488 | ||
10489 | return add_stmt (stmt); | |
10490 | } | |
10491 | ||
a68ab351 JJ |
10492 | /* OpenMP 3.0: |
10493 | # pragma omp task task-clause[optseq] new-line | |
c2255bc4 AH |
10494 | |
10495 | LOC is the location of the #pragma. | |
a68ab351 JJ |
10496 | */ |
10497 | ||
10498 | #define OMP_TASK_CLAUSE_MASK \ | |
10499 | ( (1u << PRAGMA_OMP_CLAUSE_IF) \ | |
10500 | | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \ | |
10501 | | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \ | |
10502 | | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \ | |
10503 | | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \ | |
20906c66 JJ |
10504 | | (1u << PRAGMA_OMP_CLAUSE_SHARED) \ |
10505 | | (1u << PRAGMA_OMP_CLAUSE_FINAL) \ | |
10506 | | (1u << PRAGMA_OMP_CLAUSE_MERGEABLE)) | |
a68ab351 JJ |
10507 | |
10508 | static tree | |
c2255bc4 | 10509 | c_parser_omp_task (location_t loc, c_parser *parser) |
a68ab351 JJ |
10510 | { |
10511 | tree clauses, block; | |
10512 | ||
10513 | clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK, | |
10514 | "#pragma omp task"); | |
10515 | ||
10516 | block = c_begin_omp_task (); | |
10517 | c_parser_statement (parser); | |
c2255bc4 | 10518 | return c_finish_omp_task (loc, clauses, block); |
a68ab351 JJ |
10519 | } |
10520 | ||
10521 | /* OpenMP 3.0: | |
10522 | # pragma omp taskwait new-line | |
10523 | */ | |
10524 | ||
10525 | static void | |
10526 | c_parser_omp_taskwait (c_parser *parser) | |
10527 | { | |
c2255bc4 | 10528 | location_t loc = c_parser_peek_token (parser)->location; |
a68ab351 JJ |
10529 | c_parser_consume_pragma (parser); |
10530 | c_parser_skip_to_pragma_eol (parser); | |
10531 | ||
c2255bc4 | 10532 | c_finish_omp_taskwait (loc); |
a68ab351 | 10533 | } |
953ff289 | 10534 | |
20906c66 JJ |
10535 | /* OpenMP 3.1: |
10536 | # pragma omp taskyield new-line | |
10537 | */ | |
10538 | ||
10539 | static void | |
10540 | c_parser_omp_taskyield (c_parser *parser) | |
10541 | { | |
10542 | location_t loc = c_parser_peek_token (parser)->location; | |
10543 | c_parser_consume_pragma (parser); | |
10544 | c_parser_skip_to_pragma_eol (parser); | |
10545 | ||
10546 | c_finish_omp_taskyield (loc); | |
10547 | } | |
10548 | ||
953ff289 DN |
10549 | /* Main entry point to parsing most OpenMP pragmas. */ |
10550 | ||
10551 | static void | |
10552 | c_parser_omp_construct (c_parser *parser) | |
10553 | { | |
10554 | enum pragma_kind p_kind; | |
10555 | location_t loc; | |
10556 | tree stmt; | |
10557 | ||
10558 | loc = c_parser_peek_token (parser)->location; | |
10559 | p_kind = c_parser_peek_token (parser)->pragma_kind; | |
10560 | c_parser_consume_pragma (parser); | |
10561 | ||
10562 | switch (p_kind) | |
10563 | { | |
10564 | case PRAGMA_OMP_ATOMIC: | |
c2255bc4 | 10565 | c_parser_omp_atomic (loc, parser); |
953ff289 DN |
10566 | return; |
10567 | case PRAGMA_OMP_CRITICAL: | |
c2255bc4 | 10568 | stmt = c_parser_omp_critical (loc, parser); |
953ff289 DN |
10569 | break; |
10570 | case PRAGMA_OMP_FOR: | |
c2255bc4 | 10571 | stmt = c_parser_omp_for (loc, parser); |
953ff289 DN |
10572 | break; |
10573 | case PRAGMA_OMP_MASTER: | |
c2255bc4 | 10574 | stmt = c_parser_omp_master (loc, parser); |
953ff289 DN |
10575 | break; |
10576 | case PRAGMA_OMP_ORDERED: | |
c2255bc4 | 10577 | stmt = c_parser_omp_ordered (loc, parser); |
953ff289 DN |
10578 | break; |
10579 | case PRAGMA_OMP_PARALLEL: | |
c2255bc4 | 10580 | stmt = c_parser_omp_parallel (loc, parser); |
953ff289 DN |
10581 | break; |
10582 | case PRAGMA_OMP_SECTIONS: | |
c2255bc4 | 10583 | stmt = c_parser_omp_sections (loc, parser); |
953ff289 DN |
10584 | break; |
10585 | case PRAGMA_OMP_SINGLE: | |
c2255bc4 | 10586 | stmt = c_parser_omp_single (loc, parser); |
953ff289 | 10587 | break; |
a68ab351 | 10588 | case PRAGMA_OMP_TASK: |
c2255bc4 | 10589 | stmt = c_parser_omp_task (loc, parser); |
a68ab351 | 10590 | break; |
953ff289 DN |
10591 | default: |
10592 | gcc_unreachable (); | |
10593 | } | |
10594 | ||
10595 | if (stmt) | |
c2255bc4 | 10596 | gcc_assert (EXPR_LOCATION (stmt) != UNKNOWN_LOCATION); |
953ff289 DN |
10597 | } |
10598 | ||
10599 | ||
10600 | /* OpenMP 2.5: | |
10601 | # pragma omp threadprivate (variable-list) */ | |
10602 | ||
10603 | static void | |
10604 | c_parser_omp_threadprivate (c_parser *parser) | |
10605 | { | |
10606 | tree vars, t; | |
c2255bc4 | 10607 | location_t loc; |
953ff289 DN |
10608 | |
10609 | c_parser_consume_pragma (parser); | |
c2255bc4 | 10610 | loc = c_parser_peek_token (parser)->location; |
d75d71e0 | 10611 | vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL); |
953ff289 | 10612 | |
953ff289 DN |
10613 | /* Mark every variable in VARS to be assigned thread local storage. */ |
10614 | for (t = vars; t; t = TREE_CHAIN (t)) | |
10615 | { | |
10616 | tree v = TREE_PURPOSE (t); | |
10617 | ||
c2255bc4 AH |
10618 | /* FIXME diagnostics: Ideally we should keep individual |
10619 | locations for all the variables in the var list to make the | |
10620 | following errors more precise. Perhaps | |
10621 | c_parser_omp_var_list_parens() should construct a list of | |
10622 | locations to go along with the var list. */ | |
10623 | ||
953ff289 DN |
10624 | /* If V had already been marked threadprivate, it doesn't matter |
10625 | whether it had been used prior to this point. */ | |
5df27e4a | 10626 | if (TREE_CODE (v) != VAR_DECL) |
c2255bc4 | 10627 | error_at (loc, "%qD is not a variable", v); |
5df27e4a | 10628 | else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v)) |
c2255bc4 | 10629 | error_at (loc, "%qE declared %<threadprivate%> after first use", v); |
953ff289 | 10630 | else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v)) |
c2255bc4 | 10631 | error_at (loc, "automatic variable %qE cannot be %<threadprivate%>", v); |
5df27e4a JJ |
10632 | else if (TREE_TYPE (v) == error_mark_node) |
10633 | ; | |
953ff289 | 10634 | else if (! COMPLETE_TYPE_P (TREE_TYPE (v))) |
c2255bc4 | 10635 | error_at (loc, "%<threadprivate%> %qE has incomplete type", v); |
953ff289 DN |
10636 | else |
10637 | { | |
10638 | if (! DECL_THREAD_LOCAL_P (v)) | |
10639 | { | |
10640 | DECL_TLS_MODEL (v) = decl_default_tls_model (v); | |
10641 | /* If rtl has been already set for this var, call | |
10642 | make_decl_rtl once again, so that encode_section_info | |
10643 | has a chance to look at the new decl flags. */ | |
10644 | if (DECL_RTL_SET_P (v)) | |
10645 | make_decl_rtl (v); | |
10646 | } | |
10647 | C_DECL_THREADPRIVATE_P (v) = 1; | |
10648 | } | |
10649 | } | |
10650 | ||
10651 | c_parser_skip_to_pragma_eol (parser); | |
10652 | } | |
10653 | ||
0a35513e AH |
10654 | /* Parse a transaction attribute (GCC Extension). |
10655 | ||
10656 | transaction-attribute: | |
10657 | attributes | |
10658 | [ [ any-word ] ] | |
10659 | ||
10660 | The transactional memory language description is written for C++, | |
10661 | and uses the C++0x attribute syntax. For compatibility, allow the | |
10662 | bracket style for transactions in C as well. */ | |
10663 | ||
10664 | static tree | |
10665 | c_parser_transaction_attributes (c_parser *parser) | |
10666 | { | |
10667 | tree attr_name, attr = NULL; | |
10668 | ||
10669 | if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)) | |
10670 | return c_parser_attributes (parser); | |
10671 | ||
10672 | if (!c_parser_next_token_is (parser, CPP_OPEN_SQUARE)) | |
10673 | return NULL_TREE; | |
10674 | c_parser_consume_token (parser); | |
10675 | if (!c_parser_require (parser, CPP_OPEN_SQUARE, "expected %<[%>")) | |
10676 | goto error1; | |
10677 | ||
10678 | attr_name = c_parser_attribute_any_word (parser); | |
10679 | if (attr_name) | |
10680 | { | |
10681 | c_parser_consume_token (parser); | |
10682 | attr = build_tree_list (attr_name, NULL_TREE); | |
10683 | } | |
10684 | else | |
10685 | c_parser_error (parser, "expected identifier"); | |
10686 | ||
10687 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, "expected %<]%>"); | |
10688 | error1: | |
10689 | c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, "expected %<]%>"); | |
10690 | return attr; | |
10691 | } | |
10692 | ||
10693 | /* Parse a __transaction_atomic or __transaction_relaxed statement | |
10694 | (GCC Extension). | |
10695 | ||
10696 | transaction-statement: | |
10697 | __transaction_atomic transaction-attribute[opt] compound-statement | |
10698 | __transaction_relaxed compound-statement | |
10699 | ||
10700 | Note that the only valid attribute is: "outer". | |
10701 | */ | |
10702 | ||
10703 | static tree | |
10704 | c_parser_transaction (c_parser *parser, enum rid keyword) | |
10705 | { | |
10706 | unsigned int old_in = parser->in_transaction; | |
10707 | unsigned int this_in = 1, new_in; | |
10708 | location_t loc = c_parser_peek_token (parser)->location; | |
10709 | tree stmt, attrs; | |
10710 | ||
10711 | gcc_assert ((keyword == RID_TRANSACTION_ATOMIC | |
10712 | || keyword == RID_TRANSACTION_RELAXED) | |
10713 | && c_parser_next_token_is_keyword (parser, keyword)); | |
10714 | c_parser_consume_token (parser); | |
10715 | ||
10716 | if (keyword == RID_TRANSACTION_RELAXED) | |
10717 | this_in |= TM_STMT_ATTR_RELAXED; | |
10718 | else | |
10719 | { | |
10720 | attrs = c_parser_transaction_attributes (parser); | |
10721 | if (attrs) | |
10722 | this_in |= parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER); | |
10723 | } | |
10724 | ||
10725 | /* Keep track if we're in the lexical scope of an outer transaction. */ | |
10726 | new_in = this_in | (old_in & TM_STMT_ATTR_OUTER); | |
10727 | ||
10728 | parser->in_transaction = new_in; | |
10729 | stmt = c_parser_compound_statement (parser); | |
10730 | parser->in_transaction = old_in; | |
10731 | ||
10732 | if (flag_tm) | |
10733 | stmt = c_finish_transaction (loc, stmt, this_in); | |
10734 | else | |
10735 | error_at (loc, (keyword == RID_TRANSACTION_ATOMIC ? | |
10736 | "%<__transaction_atomic%> without transactional memory support enabled" | |
10737 | : "%<__transaction_relaxed %> " | |
10738 | "without transactional memory support enabled")); | |
10739 | ||
10740 | return stmt; | |
10741 | } | |
10742 | ||
10743 | /* Parse a __transaction_atomic or __transaction_relaxed expression | |
10744 | (GCC Extension). | |
10745 | ||
10746 | transaction-expression: | |
10747 | __transaction_atomic ( expression ) | |
10748 | __transaction_relaxed ( expression ) | |
10749 | */ | |
10750 | ||
10751 | static struct c_expr | |
10752 | c_parser_transaction_expression (c_parser *parser, enum rid keyword) | |
10753 | { | |
10754 | struct c_expr ret; | |
10755 | unsigned int old_in = parser->in_transaction; | |
10756 | unsigned int this_in = 1; | |
10757 | location_t loc = c_parser_peek_token (parser)->location; | |
10758 | tree attrs; | |
10759 | ||
10760 | gcc_assert ((keyword == RID_TRANSACTION_ATOMIC | |
10761 | || keyword == RID_TRANSACTION_RELAXED) | |
10762 | && c_parser_next_token_is_keyword (parser, keyword)); | |
10763 | c_parser_consume_token (parser); | |
10764 | ||
10765 | if (keyword == RID_TRANSACTION_RELAXED) | |
10766 | this_in |= TM_STMT_ATTR_RELAXED; | |
10767 | else | |
10768 | { | |
10769 | attrs = c_parser_transaction_attributes (parser); | |
10770 | if (attrs) | |
10771 | this_in |= parse_tm_stmt_attr (attrs, 0); | |
10772 | } | |
10773 | ||
10774 | parser->in_transaction = this_in; | |
69b76518 | 10775 | if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>")) |
0a35513e AH |
10776 | { |
10777 | tree expr = c_parser_expression (parser).value; | |
10778 | ret.original_type = TREE_TYPE (expr); | |
10779 | ret.value = build1 (TRANSACTION_EXPR, ret.original_type, expr); | |
10780 | if (this_in & TM_STMT_ATTR_RELAXED) | |
10781 | TRANSACTION_EXPR_RELAXED (ret.value) = 1; | |
10782 | SET_EXPR_LOCATION (ret.value, loc); | |
10783 | ret.original_code = TRANSACTION_EXPR; | |
69b76518 TR |
10784 | if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>")) |
10785 | { | |
10786 | c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL); | |
10787 | goto error; | |
10788 | } | |
0a35513e AH |
10789 | } |
10790 | else | |
10791 | { | |
69b76518 | 10792 | error: |
0a35513e AH |
10793 | ret.value = error_mark_node; |
10794 | ret.original_code = ERROR_MARK; | |
10795 | ret.original_type = NULL; | |
10796 | } | |
10797 | parser->in_transaction = old_in; | |
10798 | ||
10799 | if (!flag_tm) | |
10800 | error_at (loc, (keyword == RID_TRANSACTION_ATOMIC ? | |
10801 | "%<__transaction_atomic%> without transactional memory support enabled" | |
10802 | : "%<__transaction_relaxed %> " | |
10803 | "without transactional memory support enabled")); | |
10804 | ||
10805 | return ret; | |
10806 | } | |
10807 | ||
10808 | /* Parse a __transaction_cancel statement (GCC Extension). | |
10809 | ||
10810 | transaction-cancel-statement: | |
10811 | __transaction_cancel transaction-attribute[opt] ; | |
10812 | ||
10813 | Note that the only valid attribute is "outer". | |
10814 | */ | |
10815 | ||
10816 | static tree | |
10817 | c_parser_transaction_cancel(c_parser *parser) | |
10818 | { | |
10819 | location_t loc = c_parser_peek_token (parser)->location; | |
10820 | tree attrs; | |
10821 | bool is_outer = false; | |
10822 | ||
10823 | gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRANSACTION_CANCEL)); | |
10824 | c_parser_consume_token (parser); | |
10825 | ||
10826 | attrs = c_parser_transaction_attributes (parser); | |
10827 | if (attrs) | |
10828 | is_outer = (parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER) != 0); | |
10829 | ||
10830 | if (!flag_tm) | |
10831 | { | |
10832 | error_at (loc, "%<__transaction_cancel%> without " | |
10833 | "transactional memory support enabled"); | |
10834 | goto ret_error; | |
10835 | } | |
10836 | else if (parser->in_transaction & TM_STMT_ATTR_RELAXED) | |
10837 | { | |
10838 | error_at (loc, "%<__transaction_cancel%> within a " | |
10839 | "%<__transaction_relaxed%>"); | |
10840 | goto ret_error; | |
10841 | } | |
10842 | else if (is_outer) | |
10843 | { | |
10844 | if ((parser->in_transaction & TM_STMT_ATTR_OUTER) == 0 | |
10845 | && !is_tm_may_cancel_outer (current_function_decl)) | |
10846 | { | |
10847 | error_at (loc, "outer %<__transaction_cancel%> not " | |
10848 | "within outer %<__transaction_atomic%>"); | |
10849 | error_at (loc, " or a %<transaction_may_cancel_outer%> function"); | |
10850 | goto ret_error; | |
10851 | } | |
10852 | } | |
10853 | else if (parser->in_transaction == 0) | |
10854 | { | |
10855 | error_at (loc, "%<__transaction_cancel%> not within " | |
10856 | "%<__transaction_atomic%>"); | |
10857 | goto ret_error; | |
10858 | } | |
10859 | ||
10860 | return add_stmt (build_tm_abort_call (loc, is_outer)); | |
10861 | ||
10862 | ret_error: | |
10863 | return build1 (NOP_EXPR, void_type_node, error_mark_node); | |
10864 | } | |
bc4071dd | 10865 | \f |
27bf414c JM |
10866 | /* Parse a single source file. */ |
10867 | ||
10868 | void | |
10869 | c_parse_file (void) | |
10870 | { | |
bc4071dd RH |
10871 | /* Use local storage to begin. If the first token is a pragma, parse it. |
10872 | If it is #pragma GCC pch_preprocess, then this will load a PCH file | |
10873 | which will cause garbage collection. */ | |
10874 | c_parser tparser; | |
10875 | ||
10876 | memset (&tparser, 0, sizeof tparser); | |
10877 | the_parser = &tparser; | |
10878 | ||
10879 | if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS) | |
10880 | c_parser_pragma_pch_preprocess (&tparser); | |
10881 | ||
a9429e29 | 10882 | the_parser = ggc_alloc_c_parser (); |
bc4071dd RH |
10883 | *the_parser = tparser; |
10884 | ||
f9417da1 RG |
10885 | /* Initialize EH, if we've been told to do so. */ |
10886 | if (flag_exceptions) | |
1d65f45c | 10887 | using_eh_for_cleanups (); |
f9417da1 | 10888 | |
27bf414c JM |
10889 | c_parser_translation_unit (the_parser); |
10890 | the_parser = NULL; | |
10891 | } | |
10892 | ||
d4a10d0a | 10893 | #include "gt-c-c-parser.h" |