1 /* Parser for C and Objective-C.
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 Parser actions based on the old Bison parser; structure somewhat
7 influenced by and fragments based on the C++ parser.
9 This file is part of GCC.
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
13 Software Foundation; either version 3, or (at your option) any later
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
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
27 Make sure all relevant comments, and all relevant code from all
28 actions, brought over from old parser. Verify exact correspondence
31 Add testcases covering every input symbol in every state in old and
34 Include full syntax for GNU C, including erroneous cases accepted
35 with error messages, in syntax productions in comments.
37 Make more diagnostics in the front end generally take an explicit
38 location rather than implicitly using input_location. */
42 #include "coretypes.h"
43 #include "tm.h" /* For rtl.h: needs enum reg_class. */
45 #include "langhooks.h"
49 #include "c-family/c-pragma.h"
54 #include "c-family/c-common.h"
55 #include "c-family/c-objc.h"
62 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
73 /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in
74 the c_token structure. */
75 gcc_assert (RID_MAX <= 255);
82 mask |= D_ASM | D_EXT;
86 if (!c_dialect_objc ())
87 mask |= D_OBJC | D_CXX_OBJC;
89 ridpointers = ggc_alloc_cleared_vec_tree ((int) RID_MAX);
90 for (i = 0; i < num_c_common_reswords; i++)
92 /* If a keyword is disabled, do not enter it into the table
93 and so create a canonical spelling that isn't a keyword. */
94 if (c_common_reswords[i].disable & mask)
97 && (c_common_reswords[i].disable & D_CXXWARN))
99 id = get_identifier (c_common_reswords[i].word);
100 C_SET_RID_CODE (id, RID_CXX_COMPAT_WARN);
101 C_IS_RESERVED_WORD (id) = 1;
106 id = get_identifier (c_common_reswords[i].word);
107 C_SET_RID_CODE (id, c_common_reswords[i].rid);
108 C_IS_RESERVED_WORD (id) = 1;
109 ridpointers [(int) c_common_reswords[i].rid] = id;
113 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
114 and the C parser. Unlike the C++ lexer, the parser structure
115 stores the lexer information instead of using a separate structure.
116 Identifiers are separated into ordinary identifiers, type names,
117 keywords and some other Objective-C types of identifiers, and some
118 look-ahead is maintained.
120 ??? It might be a good idea to lex the whole file up front (as for
121 C++). It would then be possible to share more of the C and C++
122 lexer code, if desired. */
124 /* The following local token type is used. */
127 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
129 /* More information about the type of a CPP_NAME token. */
130 typedef enum c_id_kind {
131 /* An ordinary identifier. */
133 /* An identifier declared as a typedef name. */
135 /* An identifier declared as an Objective-C class name. */
137 /* An address space identifier. */
139 /* Not an identifier. */
143 /* A single C token after string literal concatenation and conversion
144 of preprocessing tokens to tokens. */
145 typedef struct GTY (()) c_token {
146 /* The kind of token. */
147 ENUM_BITFIELD (cpp_ttype) type : 8;
148 /* If this token is a CPP_NAME, this value indicates whether also
149 declared as some kind of type. Otherwise, it is C_ID_NONE. */
150 ENUM_BITFIELD (c_id_kind) id_kind : 8;
151 /* If this token is a keyword, this value indicates which keyword.
152 Otherwise, this value is RID_MAX. */
153 ENUM_BITFIELD (rid) keyword : 8;
154 /* If this token is a CPP_PRAGMA, this indicates the pragma that
155 was seen. Otherwise it is PRAGMA_NONE. */
156 ENUM_BITFIELD (pragma_kind) pragma_kind : 8;
157 /* The location at which this token was found. */
159 /* The value associated with this token, if any. */
163 /* A parser structure recording information about the state and
164 context of parsing. Includes lexer information with up to two
165 tokens of look-ahead; more are not needed for C. */
166 typedef struct GTY(()) c_parser {
167 /* The look-ahead tokens. */
169 /* How many look-ahead tokens are available (0, 1 or 2). */
171 /* True if a syntax error is being recovered from; false otherwise.
172 c_parser_error sets this flag. It should clear this flag when
173 enough tokens have been consumed to recover from the error. */
174 BOOL_BITFIELD error : 1;
175 /* True if we're processing a pragma, and shouldn't automatically
176 consume CPP_PRAGMA_EOL. */
177 BOOL_BITFIELD in_pragma : 1;
178 /* True if we're parsing the outermost block of an if statement. */
179 BOOL_BITFIELD in_if_block : 1;
180 /* True if we want to lex an untranslated string. */
181 BOOL_BITFIELD lex_untranslated_string : 1;
183 /* Objective-C specific parser/lexer information. */
185 /* True if we are in a context where the Objective-C "PQ" keywords
186 are considered keywords. */
187 BOOL_BITFIELD objc_pq_context : 1;
188 /* True if we are parsing a (potential) Objective-C foreach
189 statement. This is set to true after we parsed 'for (' and while
190 we wait for 'in' or ';' to decide if it's a standard C for loop or an
191 Objective-C foreach loop. */
192 BOOL_BITFIELD objc_could_be_foreach_context : 1;
193 /* The following flag is needed to contextualize Objective-C lexical
194 analysis. In some cases (e.g., 'int NSObject;'), it is
195 undesirable to bind an identifier to an Objective-C class, even
196 if a class with that name exists. */
197 BOOL_BITFIELD objc_need_raw_identifier : 1;
198 /* True if we are in a context where the Objective-C "Property attribute"
199 keywords are valid. */
200 BOOL_BITFIELD objc_property_attr_context : 1;
204 /* The actual parser and external interface. ??? Does this need to be
205 garbage-collected? */
207 static GTY (()) c_parser *the_parser;
209 /* Read in and lex a single token, storing it in *TOKEN. */
212 c_lex_one_token (c_parser *parser, c_token *token)
214 timevar_push (TV_LEX);
216 token->type = c_lex_with_flags (&token->value, &token->location, NULL,
217 (parser->lex_untranslated_string
218 ? C_LEX_STRING_NO_TRANSLATE : 0));
219 token->id_kind = C_ID_NONE;
220 token->keyword = RID_MAX;
221 token->pragma_kind = PRAGMA_NONE;
229 bool objc_force_identifier = parser->objc_need_raw_identifier;
230 if (c_dialect_objc ())
231 parser->objc_need_raw_identifier = false;
233 if (C_IS_RESERVED_WORD (token->value))
235 enum rid rid_code = C_RID_CODE (token->value);
237 if (rid_code == RID_CXX_COMPAT_WARN)
239 warning_at (token->location,
241 "identifier %qE conflicts with C++ keyword",
244 else if (rid_code >= RID_FIRST_ADDR_SPACE
245 && rid_code <= RID_LAST_ADDR_SPACE)
247 token->id_kind = C_ID_ADDRSPACE;
248 token->keyword = rid_code;
251 else if (c_dialect_objc () && OBJC_IS_PQ_KEYWORD (rid_code))
253 /* We found an Objective-C "pq" keyword (in, out,
254 inout, bycopy, byref, oneway). They need special
255 care because the interpretation depends on the
257 if (parser->objc_pq_context)
259 token->type = CPP_KEYWORD;
260 token->keyword = rid_code;
263 else if (parser->objc_could_be_foreach_context
264 && rid_code == RID_IN)
266 /* We are in Objective-C, inside a (potential)
267 foreach context (which means after having
268 parsed 'for (', but before having parsed ';'),
269 and we found 'in'. We consider it the keyword
270 which terminates the declaration at the
271 beginning of a foreach-statement. Note that
272 this means you can't use 'in' for anything else
273 in that context; in particular, in Objective-C
274 you can't use 'in' as the name of the running
275 variable in a C for loop. We could potentially
276 try to add code here to disambiguate, but it
277 seems a reasonable limitation. */
278 token->type = CPP_KEYWORD;
279 token->keyword = rid_code;
282 /* Else, "pq" keywords outside of the "pq" context are
283 not keywords, and we fall through to the code for
286 else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code))
288 /* We found an Objective-C "property attribute"
289 keyword (getter, setter, readonly, etc). These are
290 only valid in the property context. */
291 if (parser->objc_property_attr_context)
293 token->type = CPP_KEYWORD;
294 token->keyword = rid_code;
297 /* Else they are not special keywords.
300 else if (c_dialect_objc ()
301 && (OBJC_IS_AT_KEYWORD (rid_code)
302 || OBJC_IS_CXX_KEYWORD (rid_code)))
304 /* We found one of the Objective-C "@" keywords (defs,
305 selector, synchronized, etc) or one of the
306 Objective-C "cxx" keywords (class, private,
307 protected, public, try, catch, throw) without a
308 preceding '@' sign. Do nothing and fall through to
309 the code for normal tokens (in C++ we would still
310 consider the CXX ones keywords, but not in C). */
315 token->type = CPP_KEYWORD;
316 token->keyword = rid_code;
321 decl = lookup_name (token->value);
324 if (TREE_CODE (decl) == TYPE_DECL)
326 token->id_kind = C_ID_TYPENAME;
330 else if (c_dialect_objc ())
332 tree objc_interface_decl = objc_is_class_name (token->value);
333 /* Objective-C class names are in the same namespace as
334 variables and typedefs, and hence are shadowed by local
336 if (objc_interface_decl
337 && (!objc_force_identifier || global_bindings_p ()))
339 token->value = objc_interface_decl;
340 token->id_kind = C_ID_CLASSNAME;
344 token->id_kind = C_ID_ID;
348 /* This only happens in Objective-C; it must be a keyword. */
349 token->type = CPP_KEYWORD;
350 switch (C_RID_CODE (token->value))
352 /* Replace 'class' with '@class', 'private' with '@private',
353 etc. This prevents confusion with the C++ keyword
354 'class', and makes the tokens consistent with other
355 Objective-C 'AT' keywords. For example '@class' is
356 reported as RID_AT_CLASS which is consistent with
357 '@synchronized', which is reported as
360 case RID_CLASS: token->keyword = RID_AT_CLASS; break;
361 case RID_PRIVATE: token->keyword = RID_AT_PRIVATE; break;
362 case RID_PROTECTED: token->keyword = RID_AT_PROTECTED; break;
363 case RID_PUBLIC: token->keyword = RID_AT_PUBLIC; break;
364 case RID_THROW: token->keyword = RID_AT_THROW; break;
365 case RID_TRY: token->keyword = RID_AT_TRY; break;
366 case RID_CATCH: token->keyword = RID_AT_CATCH; break;
367 default: token->keyword = C_RID_CODE (token->value);
372 case CPP_CLOSE_PAREN:
374 /* These tokens may affect the interpretation of any identifiers
375 following, if doing Objective-C. */
376 if (c_dialect_objc ())
377 parser->objc_need_raw_identifier = false;
380 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
381 token->pragma_kind = (enum pragma_kind) TREE_INT_CST_LOW (token->value);
387 timevar_pop (TV_LEX);
390 /* Return a pointer to the next token from PARSER, reading it in if
393 static inline c_token *
394 c_parser_peek_token (c_parser *parser)
396 if (parser->tokens_avail == 0)
398 c_lex_one_token (parser, &parser->tokens[0]);
399 parser->tokens_avail = 1;
401 return &parser->tokens[0];
404 /* Return true if the next token from PARSER has the indicated
408 c_parser_next_token_is (c_parser *parser, enum cpp_ttype type)
410 return c_parser_peek_token (parser)->type == type;
413 /* Return true if the next token from PARSER does not have the
417 c_parser_next_token_is_not (c_parser *parser, enum cpp_ttype type)
419 return !c_parser_next_token_is (parser, type);
422 /* Return true if the next token from PARSER is the indicated
426 c_parser_next_token_is_keyword (c_parser *parser, enum rid keyword)
428 return c_parser_peek_token (parser)->keyword == keyword;
431 /* Return a pointer to the next-but-one token from PARSER, reading it
432 in if necessary. The next token is already read in. */
435 c_parser_peek_2nd_token (c_parser *parser)
437 if (parser->tokens_avail >= 2)
438 return &parser->tokens[1];
439 gcc_assert (parser->tokens_avail == 1);
440 gcc_assert (parser->tokens[0].type != CPP_EOF);
441 gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
442 c_lex_one_token (parser, &parser->tokens[1]);
443 parser->tokens_avail = 2;
444 return &parser->tokens[1];
447 /* Return true if TOKEN can start a type name,
450 c_token_starts_typename (c_token *token)
455 switch (token->id_kind)
464 gcc_assert (c_dialect_objc ());
470 switch (token->keyword)
503 if (c_dialect_objc ())
511 enum c_lookahead_kind {
512 /* Always treat unknown identifiers as typenames. */
515 /* Could be parsing a nonabstract declarator. Only treat an identifier
516 as a typename if followed by another identifier or a star. */
517 cla_nonabstract_decl,
519 /* Never treat identifiers as typenames. */
523 /* Return true if the next token from PARSER can start a type name,
524 false otherwise. LA specifies how to do lookahead in order to
525 detect unknown type names. If unsure, pick CLA_PREFER_ID. */
528 c_parser_next_tokens_start_typename (c_parser *parser, enum c_lookahead_kind la)
530 c_token *token = c_parser_peek_token (parser);
531 if (c_token_starts_typename (token))
534 /* Try a bit harder to detect an unknown typename. */
535 if (la != cla_prefer_id
536 && token->type == CPP_NAME
537 && token->id_kind == C_ID_ID
539 /* Do not try too hard when we could have "object in array". */
540 && !parser->objc_could_be_foreach_context
542 && (la == cla_prefer_type
543 || c_parser_peek_2nd_token (parser)->type == CPP_NAME
544 || c_parser_peek_2nd_token (parser)->type == CPP_MULT)
546 /* Only unknown identifiers. */
547 && !lookup_name (token->value))
553 /* Return true if TOKEN is a type qualifier, false otherwise. */
555 c_token_is_qualifier (c_token *token)
560 switch (token->id_kind)
568 switch (token->keyword)
585 /* Return true if the next token from PARSER is a type qualifier,
588 c_parser_next_token_is_qualifier (c_parser *parser)
590 c_token *token = c_parser_peek_token (parser);
591 return c_token_is_qualifier (token);
594 /* Return true if TOKEN can start declaration specifiers, false
597 c_token_starts_declspecs (c_token *token)
602 switch (token->id_kind)
611 gcc_assert (c_dialect_objc ());
617 switch (token->keyword)
657 if (c_dialect_objc ())
666 /* Return true if TOKEN can start declaration specifiers or a static
667 assertion, false otherwise. */
669 c_token_starts_declaration (c_token *token)
671 if (c_token_starts_declspecs (token)
672 || token->keyword == RID_STATIC_ASSERT)
678 /* Return true if the next token from PARSER can start declaration
679 specifiers, false otherwise. */
681 c_parser_next_token_starts_declspecs (c_parser *parser)
683 c_token *token = c_parser_peek_token (parser);
685 /* In Objective-C, a classname normally starts a declspecs unless it
686 is immediately followed by a dot. In that case, it is the
687 Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
688 setter/getter on the class. c_token_starts_declspecs() can't
689 differentiate between the two cases because it only checks the
690 current token, so we have a special check here. */
691 if (c_dialect_objc ()
692 && token->type == CPP_NAME
693 && token->id_kind == C_ID_CLASSNAME
694 && c_parser_peek_2nd_token (parser)->type == CPP_DOT)
697 return c_token_starts_declspecs (token);
700 /* Return true if the next tokens from PARSER can start declaration
701 specifiers or a static assertion, false otherwise. */
703 c_parser_next_tokens_start_declaration (c_parser *parser)
705 c_token *token = c_parser_peek_token (parser);
708 if (c_dialect_objc ()
709 && token->type == CPP_NAME
710 && token->id_kind == C_ID_CLASSNAME
711 && c_parser_peek_2nd_token (parser)->type == CPP_DOT)
714 /* Labels do not start declarations. */
715 if (token->type == CPP_NAME
716 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
719 if (c_token_starts_declaration (token))
722 if (c_parser_next_tokens_start_typename (parser, cla_nonabstract_decl))
728 /* Consume the next token from PARSER. */
731 c_parser_consume_token (c_parser *parser)
733 gcc_assert (parser->tokens_avail >= 1);
734 gcc_assert (parser->tokens[0].type != CPP_EOF);
735 gcc_assert (!parser->in_pragma || parser->tokens[0].type != CPP_PRAGMA_EOL);
736 gcc_assert (parser->error || parser->tokens[0].type != CPP_PRAGMA);
737 if (parser->tokens_avail == 2)
738 parser->tokens[0] = parser->tokens[1];
739 parser->tokens_avail--;
742 /* Expect the current token to be a #pragma. Consume it and remember
743 that we've begun parsing a pragma. */
746 c_parser_consume_pragma (c_parser *parser)
748 gcc_assert (!parser->in_pragma);
749 gcc_assert (parser->tokens_avail >= 1);
750 gcc_assert (parser->tokens[0].type == CPP_PRAGMA);
751 if (parser->tokens_avail == 2)
752 parser->tokens[0] = parser->tokens[1];
753 parser->tokens_avail--;
754 parser->in_pragma = true;
757 /* Update the globals input_location and in_system_header from
760 c_parser_set_source_position_from_token (c_token *token)
762 if (token->type != CPP_EOF)
764 input_location = token->location;
768 /* Issue a diagnostic of the form
769 FILE:LINE: MESSAGE before TOKEN
770 where TOKEN is the next token in the input stream of PARSER.
771 MESSAGE (specified by the caller) is usually of the form "expected
774 Do not issue a diagnostic if still recovering from an error.
776 ??? This is taken from the C++ parser, but building up messages in
777 this way is not i18n-friendly and some other approach should be
781 c_parser_error (c_parser *parser, const char *gmsgid)
783 c_token *token = c_parser_peek_token (parser);
786 parser->error = true;
789 /* This diagnostic makes more sense if it is tagged to the line of
790 the token we just peeked at. */
791 c_parser_set_source_position_from_token (token);
792 c_parse_error (gmsgid,
793 /* Because c_parse_error does not understand
794 CPP_KEYWORD, keywords are treated like
796 (token->type == CPP_KEYWORD ? CPP_NAME : token->type),
797 /* ??? The C parser does not save the cpp flags of a
798 token, we need to pass 0 here and we will not get
799 the source spelling of some tokens but rather the
800 canonical spelling. */
801 token->value, /*flags=*/0);
804 /* If the next token is of the indicated TYPE, consume it. Otherwise,
805 issue the error MSGID. If MSGID is NULL then a message has already
806 been produced and no message will be produced this time. Returns
807 true if found, false otherwise. */
810 c_parser_require (c_parser *parser,
814 if (c_parser_next_token_is (parser, type))
816 c_parser_consume_token (parser);
821 c_parser_error (parser, msgid);
826 /* If the next token is the indicated keyword, consume it. Otherwise,
827 issue the error MSGID. Returns true if found, false otherwise. */
830 c_parser_require_keyword (c_parser *parser,
834 if (c_parser_next_token_is_keyword (parser, keyword))
836 c_parser_consume_token (parser);
841 c_parser_error (parser, msgid);
846 /* Like c_parser_require, except that tokens will be skipped until the
847 desired token is found. An error message is still produced if the
848 next token is not as expected. If MSGID is NULL then a message has
849 already been produced and no message will be produced this
853 c_parser_skip_until_found (c_parser *parser,
857 unsigned nesting_depth = 0;
859 if (c_parser_require (parser, type, msgid))
862 /* Skip tokens until the desired token is found. */
865 /* Peek at the next token. */
866 c_token *token = c_parser_peek_token (parser);
867 /* If we've reached the token we want, consume it and stop. */
868 if (token->type == type && !nesting_depth)
870 c_parser_consume_token (parser);
874 /* If we've run out of tokens, stop. */
875 if (token->type == CPP_EOF)
877 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
879 if (token->type == CPP_OPEN_BRACE
880 || token->type == CPP_OPEN_PAREN
881 || token->type == CPP_OPEN_SQUARE)
883 else if (token->type == CPP_CLOSE_BRACE
884 || token->type == CPP_CLOSE_PAREN
885 || token->type == CPP_CLOSE_SQUARE)
887 if (nesting_depth-- == 0)
890 /* Consume this token. */
891 c_parser_consume_token (parser);
893 parser->error = false;
896 /* Skip tokens until the end of a parameter is found, but do not
897 consume the comma, semicolon or closing delimiter. */
900 c_parser_skip_to_end_of_parameter (c_parser *parser)
902 unsigned nesting_depth = 0;
906 c_token *token = c_parser_peek_token (parser);
907 if ((token->type == CPP_COMMA || token->type == CPP_SEMICOLON)
910 /* If we've run out of tokens, stop. */
911 if (token->type == CPP_EOF)
913 if (token->type == CPP_PRAGMA_EOL && parser->in_pragma)
915 if (token->type == CPP_OPEN_BRACE
916 || token->type == CPP_OPEN_PAREN
917 || token->type == CPP_OPEN_SQUARE)
919 else if (token->type == CPP_CLOSE_BRACE
920 || token->type == CPP_CLOSE_PAREN
921 || token->type == CPP_CLOSE_SQUARE)
923 if (nesting_depth-- == 0)
926 /* Consume this token. */
927 c_parser_consume_token (parser);
929 parser->error = false;
932 /* Expect to be at the end of the pragma directive and consume an
933 end of line marker. */
936 c_parser_skip_to_pragma_eol (c_parser *parser)
938 gcc_assert (parser->in_pragma);
939 parser->in_pragma = false;
941 if (!c_parser_require (parser, CPP_PRAGMA_EOL, "expected end of line"))
944 c_token *token = c_parser_peek_token (parser);
945 if (token->type == CPP_EOF)
947 if (token->type == CPP_PRAGMA_EOL)
949 c_parser_consume_token (parser);
952 c_parser_consume_token (parser);
955 parser->error = false;
958 /* Skip tokens until we have consumed an entire block, or until we
959 have consumed a non-nested ';'. */
962 c_parser_skip_to_end_of_block_or_statement (c_parser *parser)
964 unsigned nesting_depth = 0;
965 bool save_error = parser->error;
971 /* Peek at the next token. */
972 token = c_parser_peek_token (parser);
980 if (parser->in_pragma)
985 /* If the next token is a ';', we have reached the
986 end of the statement. */
989 /* Consume the ';'. */
990 c_parser_consume_token (parser);
995 case CPP_CLOSE_BRACE:
996 /* If the next token is a non-nested '}', then we have
997 reached the end of the current block. */
998 if (nesting_depth == 0 || --nesting_depth == 0)
1000 c_parser_consume_token (parser);
1005 case CPP_OPEN_BRACE:
1006 /* If it the next token is a '{', then we are entering a new
1007 block. Consume the entire block. */
1012 /* If we see a pragma, consume the whole thing at once. We
1013 have some safeguards against consuming pragmas willy-nilly.
1014 Normally, we'd expect to be here with parser->error set,
1015 which disables these safeguards. But it's possible to get
1016 here for secondary error recovery, after parser->error has
1018 c_parser_consume_pragma (parser);
1019 c_parser_skip_to_pragma_eol (parser);
1020 parser->error = save_error;
1027 c_parser_consume_token (parser);
1031 parser->error = false;
1034 /* CPP's options (initialized by c-opts.c). */
1035 extern cpp_options *cpp_opts;
1037 /* Save the warning flags which are controlled by __extension__. */
1040 disable_extension_diagnostics (void)
1043 | (warn_pointer_arith << 1)
1044 | (warn_traditional << 2)
1046 | (warn_long_long << 4)
1047 | (warn_cxx_compat << 5)
1048 | (warn_overlength_strings << 6));
1049 cpp_opts->cpp_pedantic = pedantic = 0;
1050 warn_pointer_arith = 0;
1051 cpp_opts->cpp_warn_traditional = warn_traditional = 0;
1053 cpp_opts->cpp_warn_long_long = warn_long_long = 0;
1054 warn_cxx_compat = 0;
1055 warn_overlength_strings = 0;
1059 /* Restore the warning flags which are controlled by __extension__.
1060 FLAGS is the return value from disable_extension_diagnostics. */
1063 restore_extension_diagnostics (int flags)
1065 cpp_opts->cpp_pedantic = pedantic = flags & 1;
1066 warn_pointer_arith = (flags >> 1) & 1;
1067 cpp_opts->cpp_warn_traditional = warn_traditional = (flags >> 2) & 1;
1068 flag_iso = (flags >> 3) & 1;
1069 cpp_opts->cpp_warn_long_long = warn_long_long = (flags >> 4) & 1;
1070 warn_cxx_compat = (flags >> 5) & 1;
1071 warn_overlength_strings = (flags >> 6) & 1;
1074 /* Possibly kinds of declarator to parse. */
1075 typedef enum c_dtr_syn {
1076 /* A normal declarator with an identifier. */
1078 /* An abstract declarator (maybe empty). */
1080 /* A parameter declarator: may be either, but after a type name does
1081 not redeclare a typedef name as an identifier if it can
1082 alternatively be interpreted as a typedef name; see DR#009,
1083 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
1084 following DR#249. For example, given a typedef T, "int T" and
1085 "int *T" are valid parameter declarations redeclaring T, while
1086 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
1087 abstract declarators rather than involving redundant parentheses;
1088 the same applies with attributes inside the parentheses before
1093 static void c_parser_external_declaration (c_parser *);
1094 static void c_parser_asm_definition (c_parser *);
1095 static void c_parser_declaration_or_fndef (c_parser *, bool, bool, bool,
1096 bool, bool, tree *);
1097 static void c_parser_static_assert_declaration_no_semi (c_parser *);
1098 static void c_parser_static_assert_declaration (c_parser *);
1099 static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool,
1100 bool, enum c_lookahead_kind);
1101 static struct c_typespec c_parser_enum_specifier (c_parser *);
1102 static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
1103 static tree c_parser_struct_declaration (c_parser *);
1104 static struct c_typespec c_parser_typeof_specifier (c_parser *);
1105 static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn,
1107 static struct c_declarator *c_parser_direct_declarator (c_parser *, bool,
1109 static struct c_declarator *c_parser_direct_declarator_inner (c_parser *,
1111 struct c_declarator *);
1112 static struct c_arg_info *c_parser_parms_declarator (c_parser *, bool, tree);
1113 static struct c_arg_info *c_parser_parms_list_declarator (c_parser *, tree);
1114 static struct c_parm *c_parser_parameter_declaration (c_parser *, tree);
1115 static tree c_parser_simple_asm_expr (c_parser *);
1116 static tree c_parser_attributes (c_parser *);
1117 static struct c_type_name *c_parser_type_name (c_parser *);
1118 static struct c_expr c_parser_initializer (c_parser *);
1119 static struct c_expr c_parser_braced_init (c_parser *, tree, bool);
1120 static void c_parser_initelt (c_parser *, struct obstack *);
1121 static void c_parser_initval (c_parser *, struct c_expr *,
1123 static tree c_parser_compound_statement (c_parser *);
1124 static void c_parser_compound_statement_nostart (c_parser *);
1125 static void c_parser_label (c_parser *);
1126 static void c_parser_statement (c_parser *);
1127 static void c_parser_statement_after_labels (c_parser *);
1128 static void c_parser_if_statement (c_parser *);
1129 static void c_parser_switch_statement (c_parser *);
1130 static void c_parser_while_statement (c_parser *);
1131 static void c_parser_do_statement (c_parser *);
1132 static void c_parser_for_statement (c_parser *);
1133 static tree c_parser_asm_statement (c_parser *);
1134 static tree c_parser_asm_operands (c_parser *, bool);
1135 static tree c_parser_asm_goto_operands (c_parser *);
1136 static tree c_parser_asm_clobbers (c_parser *);
1137 static struct c_expr c_parser_expr_no_commas (c_parser *, struct c_expr *);
1138 static struct c_expr c_parser_conditional_expression (c_parser *,
1140 static struct c_expr c_parser_binary_expression (c_parser *, struct c_expr *);
1141 static struct c_expr c_parser_cast_expression (c_parser *, struct c_expr *);
1142 static struct c_expr c_parser_unary_expression (c_parser *);
1143 static struct c_expr c_parser_sizeof_expression (c_parser *);
1144 static struct c_expr c_parser_alignof_expression (c_parser *);
1145 static struct c_expr c_parser_postfix_expression (c_parser *);
1146 static struct c_expr c_parser_postfix_expression_after_paren_type (c_parser *,
1147 struct c_type_name *,
1149 static struct c_expr c_parser_postfix_expression_after_primary (c_parser *,
1152 static struct c_expr c_parser_expression (c_parser *);
1153 static struct c_expr c_parser_expression_conv (c_parser *);
1154 static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool,
1156 static void c_parser_omp_construct (c_parser *);
1157 static void c_parser_omp_threadprivate (c_parser *);
1158 static void c_parser_omp_barrier (c_parser *);
1159 static void c_parser_omp_flush (c_parser *);
1160 static void c_parser_omp_taskwait (c_parser *);
1162 enum pragma_context { pragma_external, pragma_stmt, pragma_compound };
1163 static bool c_parser_pragma (c_parser *, enum pragma_context);
1165 /* These Objective-C parser functions are only ever called when
1166 compiling Objective-C. */
1167 static void c_parser_objc_class_definition (c_parser *, tree);
1168 static void c_parser_objc_class_instance_variables (c_parser *);
1169 static void c_parser_objc_class_declaration (c_parser *);
1170 static void c_parser_objc_alias_declaration (c_parser *);
1171 static void c_parser_objc_protocol_definition (c_parser *, tree);
1172 static bool c_parser_objc_method_type (c_parser *);
1173 static void c_parser_objc_method_definition (c_parser *);
1174 static void c_parser_objc_methodprotolist (c_parser *);
1175 static void c_parser_objc_methodproto (c_parser *);
1176 static tree c_parser_objc_method_decl (c_parser *, bool, tree *);
1177 static tree c_parser_objc_type_name (c_parser *);
1178 static tree c_parser_objc_protocol_refs (c_parser *);
1179 static void c_parser_objc_try_catch_finally_statement (c_parser *);
1180 static void c_parser_objc_synchronized_statement (c_parser *);
1181 static tree c_parser_objc_selector (c_parser *);
1182 static tree c_parser_objc_selector_arg (c_parser *);
1183 static tree c_parser_objc_receiver (c_parser *);
1184 static tree c_parser_objc_message_args (c_parser *);
1185 static tree c_parser_objc_keywordexpr (c_parser *);
1186 static void c_parser_objc_at_property_declaration (c_parser *);
1187 static void c_parser_objc_at_synthesize_declaration (c_parser *);
1188 static void c_parser_objc_at_dynamic_declaration (c_parser *);
1189 static bool c_parser_objc_diagnose_bad_element_prefix
1190 (c_parser *, struct c_declspecs *);
1192 /* Parse a translation unit (C90 6.7, C99 6.9).
1195 external-declarations
1197 external-declarations:
1198 external-declaration
1199 external-declarations external-declaration
1208 c_parser_translation_unit (c_parser *parser)
1210 if (c_parser_next_token_is (parser, CPP_EOF))
1212 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1213 "ISO C forbids an empty translation unit");
1217 void *obstack_position = obstack_alloc (&parser_obstack, 0);
1218 mark_valid_location_for_stdc_pragma (false);
1222 c_parser_external_declaration (parser);
1223 obstack_free (&parser_obstack, obstack_position);
1225 while (c_parser_next_token_is_not (parser, CPP_EOF));
1229 /* Parse an external declaration (C90 6.7, C99 6.9).
1231 external-declaration:
1237 external-declaration:
1240 __extension__ external-declaration
1244 external-declaration:
1245 objc-class-definition
1246 objc-class-declaration
1247 objc-alias-declaration
1248 objc-protocol-definition
1249 objc-method-definition
1254 c_parser_external_declaration (c_parser *parser)
1257 switch (c_parser_peek_token (parser)->type)
1260 switch (c_parser_peek_token (parser)->keyword)
1263 ext = disable_extension_diagnostics ();
1264 c_parser_consume_token (parser);
1265 c_parser_external_declaration (parser);
1266 restore_extension_diagnostics (ext);
1269 c_parser_asm_definition (parser);
1271 case RID_AT_INTERFACE:
1272 case RID_AT_IMPLEMENTATION:
1273 gcc_assert (c_dialect_objc ());
1274 c_parser_objc_class_definition (parser, NULL_TREE);
1277 gcc_assert (c_dialect_objc ());
1278 c_parser_objc_class_declaration (parser);
1281 gcc_assert (c_dialect_objc ());
1282 c_parser_objc_alias_declaration (parser);
1284 case RID_AT_PROTOCOL:
1285 gcc_assert (c_dialect_objc ());
1286 c_parser_objc_protocol_definition (parser, NULL_TREE);
1288 case RID_AT_PROPERTY:
1289 gcc_assert (c_dialect_objc ());
1290 c_parser_objc_at_property_declaration (parser);
1292 case RID_AT_SYNTHESIZE:
1293 gcc_assert (c_dialect_objc ());
1294 c_parser_objc_at_synthesize_declaration (parser);
1296 case RID_AT_DYNAMIC:
1297 gcc_assert (c_dialect_objc ());
1298 c_parser_objc_at_dynamic_declaration (parser);
1301 gcc_assert (c_dialect_objc ());
1302 c_parser_consume_token (parser);
1303 objc_finish_implementation ();
1310 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
1311 "ISO C does not allow extra %<;%> outside of a function");
1312 c_parser_consume_token (parser);
1315 mark_valid_location_for_stdc_pragma (true);
1316 c_parser_pragma (parser, pragma_external);
1317 mark_valid_location_for_stdc_pragma (false);
1321 if (c_dialect_objc ())
1323 c_parser_objc_method_definition (parser);
1326 /* Else fall through, and yield a syntax error trying to parse
1327 as a declaration or function definition. */
1330 /* A declaration or a function definition (or, in Objective-C,
1331 an @interface or @protocol with prefix attributes). We can
1332 only tell which after parsing the declaration specifiers, if
1333 any, and the first declarator. */
1334 c_parser_declaration_or_fndef (parser, true, true, true, false, true, NULL);
1339 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1340 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1341 accepted; otherwise (old-style parameter declarations) only other
1342 declarations are accepted. If STATIC_ASSERT_OK is true, a static
1343 assertion is accepted; otherwise (old-style parameter declarations)
1344 it is not. If NESTED is true, we are inside a function or parsing
1345 old-style parameter declarations; any functions encountered are
1346 nested functions and declaration specifiers are required; otherwise
1347 we are at top level and functions are normal functions and
1348 declaration specifiers may be optional. If EMPTY_OK is true, empty
1349 declarations are OK (subject to all other constraints); otherwise
1350 (old-style parameter declarations) they are diagnosed. If
1351 START_ATTR_OK is true, the declaration specifiers may start with
1352 attributes; otherwise they may not.
1353 OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed
1354 declaration when parsing an Objective-C foreach statement.
1357 declaration-specifiers init-declarator-list[opt] ;
1358 static_assert-declaration
1360 function-definition:
1361 declaration-specifiers[opt] declarator declaration-list[opt]
1366 declaration-list declaration
1368 init-declarator-list:
1370 init-declarator-list , init-declarator
1373 declarator simple-asm-expr[opt] attributes[opt]
1374 declarator simple-asm-expr[opt] attributes[opt] = initializer
1378 nested-function-definition:
1379 declaration-specifiers declarator declaration-list[opt]
1383 attributes objc-class-definition
1384 attributes objc-category-definition
1385 attributes objc-protocol-definition
1387 The simple-asm-expr and attributes are GNU extensions.
1389 This function does not handle __extension__; that is handled in its
1390 callers. ??? Following the old parser, __extension__ may start
1391 external declarations, declarations in functions and declarations
1392 at the start of "for" loops, but not old-style parameter
1395 C99 requires declaration specifiers in a function definition; the
1396 absence is diagnosed through the diagnosis of implicit int. In GNU
1397 C we also allow but diagnose declarations without declaration
1398 specifiers, but only at top level (elsewhere they conflict with
1401 In Objective-C, declarations of the looping variable in a foreach
1402 statement are exceptionally terminated by 'in' (for example, 'for
1403 (NSObject *object in array) { ... }').
1408 threadprivate-directive */
1411 c_parser_declaration_or_fndef (c_parser *parser, bool fndef_ok,
1412 bool static_assert_ok, bool empty_ok,
1413 bool nested, bool start_attr_ok,
1414 tree *objc_foreach_object_declaration)
1416 struct c_declspecs *specs;
1418 tree all_prefix_attrs;
1419 bool diagnosed_no_specs = false;
1420 location_t here = c_parser_peek_token (parser)->location;
1422 if (static_assert_ok
1423 && c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT))
1425 c_parser_static_assert_declaration (parser);
1428 specs = build_null_declspecs ();
1430 /* Try to detect an unknown type name when we have "A B" or "A *B". */
1431 if (c_parser_peek_token (parser)->type == CPP_NAME
1432 && c_parser_peek_token (parser)->id_kind == C_ID_ID
1433 && (c_parser_peek_2nd_token (parser)->type == CPP_NAME
1434 || c_parser_peek_2nd_token (parser)->type == CPP_MULT)
1435 && (!nested || !lookup_name (c_parser_peek_token (parser)->value)))
1437 error_at (here, "unknown type name %qE",
1438 c_parser_peek_token (parser)->value);
1440 /* Parse declspecs normally to get a correct pointer type, but avoid
1441 a further "fails to be a type name" error. Refuse nested functions
1442 since it is not how the user likely wants us to recover. */
1443 c_parser_peek_token (parser)->type = CPP_KEYWORD;
1444 c_parser_peek_token (parser)->keyword = RID_VOID;
1445 c_parser_peek_token (parser)->value = error_mark_node;
1449 c_parser_declspecs (parser, specs, true, true, start_attr_ok, cla_nonabstract_decl);
1452 c_parser_skip_to_end_of_block_or_statement (parser);
1455 if (nested && !specs->declspecs_seen_p)
1457 c_parser_error (parser, "expected declaration specifiers");
1458 c_parser_skip_to_end_of_block_or_statement (parser);
1461 finish_declspecs (specs);
1462 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1468 shadow_tag_warned (specs, 1);
1469 pedwarn (here, 0, "empty declaration");
1471 c_parser_consume_token (parser);
1475 /* Provide better error recovery. Note that a type name here is usually
1476 better diagnosed as a redeclaration. */
1478 && specs->typespec_kind == ctsk_tagdef
1479 && c_parser_next_token_starts_declspecs (parser)
1480 && !c_parser_next_token_is (parser, CPP_NAME))
1482 c_parser_error (parser, "expected %<;%>, identifier or %<(%>");
1483 parser->error = false;
1484 shadow_tag_warned (specs, 1);
1487 else if (c_dialect_objc ())
1489 /* Prefix attributes are an error on method decls. */
1490 switch (c_parser_peek_token (parser)->type)
1494 if (c_parser_objc_diagnose_bad_element_prefix (parser, specs))
1498 warning_at (c_parser_peek_token (parser)->location,
1500 "prefix attributes are ignored for methods");
1501 specs->attrs = NULL_TREE;
1504 c_parser_objc_method_definition (parser);
1506 c_parser_objc_methodproto (parser);
1512 /* This is where we parse 'attributes @interface ...',
1513 'attributes @implementation ...', 'attributes @protocol ...'
1514 (where attributes could be, for example, __attribute__
1517 switch (c_parser_peek_token (parser)->keyword)
1519 case RID_AT_INTERFACE:
1521 if (c_parser_objc_diagnose_bad_element_prefix (parser, specs))
1523 c_parser_objc_class_definition (parser, specs->attrs);
1527 case RID_AT_IMPLEMENTATION:
1529 if (c_parser_objc_diagnose_bad_element_prefix (parser, specs))
1533 warning_at (c_parser_peek_token (parser)->location,
1535 "prefix attributes are ignored for implementations");
1536 specs->attrs = NULL_TREE;
1538 c_parser_objc_class_definition (parser, NULL_TREE);
1542 case RID_AT_PROTOCOL:
1544 if (c_parser_objc_diagnose_bad_element_prefix (parser, specs))
1546 c_parser_objc_protocol_definition (parser, specs->attrs);
1553 case RID_AT_PROPERTY:
1556 c_parser_error (parser, "unexpected attribute");
1557 specs->attrs = NULL;
1565 pending_xref_error ();
1566 prefix_attrs = specs->attrs;
1567 all_prefix_attrs = prefix_attrs;
1568 specs->attrs = NULL_TREE;
1571 struct c_declarator *declarator;
1574 /* Declaring either one or more declarators (in which case we
1575 should diagnose if there were no declaration specifiers) or a
1576 function definition (in which case the diagnostic for
1577 implicit int suffices). */
1578 declarator = c_parser_declarator (parser,
1579 specs->typespec_kind != ctsk_none,
1580 C_DTR_NORMAL, &dummy);
1581 if (declarator == NULL)
1583 c_parser_skip_to_end_of_block_or_statement (parser);
1586 if (c_parser_next_token_is (parser, CPP_EQ)
1587 || c_parser_next_token_is (parser, CPP_COMMA)
1588 || c_parser_next_token_is (parser, CPP_SEMICOLON)
1589 || c_parser_next_token_is_keyword (parser, RID_ASM)
1590 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE)
1591 || c_parser_next_token_is_keyword (parser, RID_IN))
1593 tree asm_name = NULL_TREE;
1594 tree postfix_attrs = NULL_TREE;
1595 if (!diagnosed_no_specs && !specs->declspecs_seen_p)
1597 diagnosed_no_specs = true;
1598 pedwarn (here, 0, "data definition has no type or storage class");
1600 /* Having seen a data definition, there cannot now be a
1601 function definition. */
1603 if (c_parser_next_token_is_keyword (parser, RID_ASM))
1604 asm_name = c_parser_simple_asm_expr (parser);
1605 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1606 postfix_attrs = c_parser_attributes (parser);
1607 if (c_parser_next_token_is (parser, CPP_EQ))
1611 location_t init_loc;
1612 c_parser_consume_token (parser);
1613 /* The declaration of the variable is in effect while
1614 its initializer is parsed. */
1615 d = start_decl (declarator, specs, true,
1616 chainon (postfix_attrs, all_prefix_attrs));
1618 d = error_mark_node;
1619 start_init (d, asm_name, global_bindings_p ());
1620 init_loc = c_parser_peek_token (parser)->location;
1621 init = c_parser_initializer (parser);
1623 if (d != error_mark_node)
1625 maybe_warn_string_init (TREE_TYPE (d), init);
1626 finish_decl (d, init_loc, init.value,
1627 init.original_type, asm_name);
1632 tree d = start_decl (declarator, specs, false,
1633 chainon (postfix_attrs,
1636 finish_decl (d, UNKNOWN_LOCATION, NULL_TREE,
1637 NULL_TREE, asm_name);
1639 if (c_parser_next_token_is_keyword (parser, RID_IN))
1642 *objc_foreach_object_declaration = d;
1644 *objc_foreach_object_declaration = error_mark_node;
1647 if (c_parser_next_token_is (parser, CPP_COMMA))
1649 c_parser_consume_token (parser);
1650 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
1651 all_prefix_attrs = chainon (c_parser_attributes (parser),
1654 all_prefix_attrs = prefix_attrs;
1657 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
1659 c_parser_consume_token (parser);
1662 else if (c_parser_next_token_is_keyword (parser, RID_IN))
1664 /* This can only happen in Objective-C: we found the
1665 'in' that terminates the declaration inside an
1666 Objective-C foreach statement. Do not consume the
1667 token, so that the caller can use it to determine
1668 that this indeed is a foreach context. */
1673 c_parser_error (parser, "expected %<,%> or %<;%>");
1674 c_parser_skip_to_end_of_block_or_statement (parser);
1680 c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, "
1681 "%<asm%> or %<__attribute__%>");
1682 c_parser_skip_to_end_of_block_or_statement (parser);
1685 /* Function definition (nested or otherwise). */
1688 pedwarn (here, OPT_pedantic, "ISO C forbids nested functions");
1689 c_push_function_context ();
1691 if (!start_function (specs, declarator, all_prefix_attrs))
1693 /* This can appear in many cases looking nothing like a
1694 function definition, so we don't give a more specific
1695 error suggesting there was one. */
1696 c_parser_error (parser, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1697 "or %<__attribute__%>");
1699 c_pop_function_context ();
1702 /* Parse old-style parameter declarations. ??? Attributes are
1703 not allowed to start declaration specifiers here because of a
1704 syntax conflict between a function declaration with attribute
1705 suffix and a function definition with an attribute prefix on
1706 first old-style parameter declaration. Following the old
1707 parser, they are not accepted on subsequent old-style
1708 parameter declarations either. However, there is no
1709 ambiguity after the first declaration, nor indeed on the
1710 first as long as we don't allow postfix attributes after a
1711 declarator with a nonempty identifier list in a definition;
1712 and postfix attributes have never been accepted here in
1713 function definitions either. */
1714 while (c_parser_next_token_is_not (parser, CPP_EOF)
1715 && c_parser_next_token_is_not (parser, CPP_OPEN_BRACE))
1716 c_parser_declaration_or_fndef (parser, false, false, false,
1718 store_parm_decls ();
1719 DECL_STRUCT_FUNCTION (current_function_decl)->function_start_locus
1720 = c_parser_peek_token (parser)->location;
1721 fnbody = c_parser_compound_statement (parser);
1724 tree decl = current_function_decl;
1725 /* Mark nested functions as needing static-chain initially.
1726 lower_nested_functions will recompute it but the
1727 DECL_STATIC_CHAIN flag is also used before that happens,
1728 by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */
1729 DECL_STATIC_CHAIN (decl) = 1;
1732 c_pop_function_context ();
1733 add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl), DECL_EXPR, decl));
1744 /* Parse an asm-definition (asm() outside a function body). This is a
1752 c_parser_asm_definition (c_parser *parser)
1754 tree asm_str = c_parser_simple_asm_expr (parser);
1756 cgraph_add_asm_node (asm_str);
1757 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
1760 /* Parse a static assertion (C1X N1425 6.7.10).
1762 static_assert-declaration:
1763 static_assert-declaration-no-semi ;
1767 c_parser_static_assert_declaration (c_parser *parser)
1769 c_parser_static_assert_declaration_no_semi (parser);
1771 || !c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
1772 c_parser_skip_to_end_of_block_or_statement (parser);
1775 /* Parse a static assertion (C1X N1425 6.7.10), without the trailing
1778 static_assert-declaration-no-semi:
1779 _Static_assert ( constant-expression , string-literal )
1783 c_parser_static_assert_declaration_no_semi (c_parser *parser)
1785 location_t assert_loc, value_loc;
1789 gcc_assert (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT));
1790 assert_loc = c_parser_peek_token (parser)->location;
1794 pedwarn (assert_loc, OPT_pedantic,
1795 "ISO C99 does not support %<_Static_assert%>");
1797 pedwarn (assert_loc, OPT_pedantic,
1798 "ISO C90 does not support %<_Static_assert%>");
1800 c_parser_consume_token (parser);
1801 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
1803 value_loc = c_parser_peek_token (parser)->location;
1804 value = c_parser_expr_no_commas (parser, NULL).value;
1805 parser->lex_untranslated_string = true;
1806 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
1808 parser->lex_untranslated_string = false;
1811 switch (c_parser_peek_token (parser)->type)
1817 case CPP_UTF8STRING:
1818 string = c_parser_peek_token (parser)->value;
1819 c_parser_consume_token (parser);
1820 parser->lex_untranslated_string = false;
1823 c_parser_error (parser, "expected string literal");
1824 parser->lex_untranslated_string = false;
1827 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
1829 if (!INTEGRAL_TYPE_P (TREE_TYPE (value)))
1831 error_at (value_loc, "expression in static assertion is not an integer");
1834 if (TREE_CODE (value) != INTEGER_CST)
1836 value = c_fully_fold (value, false, NULL);
1837 if (TREE_CODE (value) == INTEGER_CST)
1838 pedwarn (value_loc, OPT_pedantic, "expression in static assertion "
1839 "is not an integer constant expression");
1841 if (TREE_CODE (value) != INTEGER_CST)
1843 error_at (value_loc, "expression in static assertion is not constant");
1846 constant_expression_warning (value);
1847 if (integer_zerop (value))
1848 error_at (assert_loc, "static assertion failed: %E", string);
1851 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1852 6.7), adding them to SPECS (which may already include some).
1853 Storage class specifiers are accepted iff SCSPEC_OK; type
1854 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1855 the start iff START_ATTR_OK.
1857 declaration-specifiers:
1858 storage-class-specifier declaration-specifiers[opt]
1859 type-specifier declaration-specifiers[opt]
1860 type-qualifier declaration-specifiers[opt]
1861 function-specifier declaration-specifiers[opt]
1863 Function specifiers (inline) are from C99, and are currently
1864 handled as storage class specifiers, as is __thread.
1866 C90 6.5.1, C99 6.7.1:
1867 storage-class-specifier:
1878 C90 6.5.2, C99 6.7.2:
1891 [_Imaginary removed in C99 TC2]
1892 struct-or-union-specifier
1896 (_Bool and _Complex are new in C99.)
1898 C90 6.5.3, C99 6.7.3:
1904 address-space-qualifier
1906 (restrict is new in C99.)
1910 declaration-specifiers:
1911 attributes declaration-specifiers[opt]
1917 identifier recognized by the target
1919 storage-class-specifier:
1932 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1933 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1938 class-name objc-protocol-refs[opt]
1939 typedef-name objc-protocol-refs
1944 c_parser_declspecs (c_parser *parser, struct c_declspecs *specs,
1945 bool scspec_ok, bool typespec_ok, bool start_attr_ok,
1946 enum c_lookahead_kind la)
1948 bool attrs_ok = start_attr_ok;
1949 bool seen_type = specs->typespec_kind != ctsk_none;
1952 gcc_assert (la == cla_prefer_id);
1954 while (c_parser_next_token_is (parser, CPP_NAME)
1955 || c_parser_next_token_is (parser, CPP_KEYWORD)
1956 || (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS)))
1958 struct c_typespec t;
1960 location_t loc = c_parser_peek_token (parser)->location;
1962 /* If we cannot accept a type, exit if the next token must start
1963 one. Also, if we already have seen a tagged definition,
1964 a typename would be an error anyway and likely the user
1965 has simply forgotten a semicolon, so we exit. */
1966 if ((!typespec_ok || specs->typespec_kind == ctsk_tagdef)
1967 && c_parser_next_tokens_start_typename (parser, la)
1968 && !c_parser_next_token_is_qualifier (parser))
1971 if (c_parser_next_token_is (parser, CPP_NAME))
1973 tree value = c_parser_peek_token (parser)->value;
1974 c_id_kind kind = c_parser_peek_token (parser)->id_kind;
1976 if (kind == C_ID_ADDRSPACE)
1979 = c_parser_peek_token (parser)->keyword - RID_FIRST_ADDR_SPACE;
1980 declspecs_add_addrspace (specs, as);
1981 c_parser_consume_token (parser);
1986 gcc_assert (!c_parser_next_token_is_qualifier (parser));
1988 /* If we cannot accept a type, and the next token must start one,
1989 exit. Do the same if we already have seen a tagged definition,
1990 since it would be an error anyway and likely the user has simply
1991 forgotten a semicolon. */
1992 if (seen_type || !c_parser_next_tokens_start_typename (parser, la))
1995 /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
1996 a C_ID_CLASSNAME. */
1997 c_parser_consume_token (parser);
2000 if (kind == C_ID_ID)
2002 error ("unknown type name %qE", value);
2003 t.kind = ctsk_typedef;
2004 t.spec = error_mark_node;
2006 else if (kind == C_ID_TYPENAME
2007 && (!c_dialect_objc ()
2008 || c_parser_next_token_is_not (parser, CPP_LESS)))
2010 t.kind = ctsk_typedef;
2011 /* For a typedef name, record the meaning, not the name.
2012 In case of 'foo foo, bar;'. */
2013 t.spec = lookup_name (value);
2017 tree proto = NULL_TREE;
2018 gcc_assert (c_dialect_objc ());
2020 if (c_parser_next_token_is (parser, CPP_LESS))
2021 proto = c_parser_objc_protocol_refs (parser);
2022 t.spec = objc_get_protocol_qualified_type (value, proto);
2025 t.expr_const_operands = true;
2026 declspecs_add_type (loc, specs, t);
2029 if (c_parser_next_token_is (parser, CPP_LESS))
2031 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
2032 nisse@lysator.liu.se. */
2034 gcc_assert (c_dialect_objc ());
2035 if (!typespec_ok || seen_type)
2037 proto = c_parser_objc_protocol_refs (parser);
2039 t.spec = objc_get_protocol_qualified_type (NULL_TREE, proto);
2041 t.expr_const_operands = true;
2042 declspecs_add_type (loc, specs, t);
2045 gcc_assert (c_parser_next_token_is (parser, CPP_KEYWORD));
2046 switch (c_parser_peek_token (parser)->keyword)
2058 /* TODO: Distinguish between function specifiers (inline)
2059 and storage class specifiers, either here or in
2060 declspecs_add_scspec. */
2061 declspecs_add_scspec (specs, c_parser_peek_token (parser)->value);
2062 c_parser_consume_token (parser);
2086 if (c_dialect_objc ())
2087 parser->objc_need_raw_identifier = true;
2088 t.kind = ctsk_resword;
2089 t.spec = c_parser_peek_token (parser)->value;
2091 t.expr_const_operands = true;
2092 declspecs_add_type (loc, specs, t);
2093 c_parser_consume_token (parser);
2100 t = c_parser_enum_specifier (parser);
2101 declspecs_add_type (loc, specs, t);
2109 t = c_parser_struct_or_union_specifier (parser);
2110 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE, t.spec);
2111 declspecs_add_type (loc, specs, t);
2114 /* ??? The old parser rejected typeof after other type
2115 specifiers, but is a syntax error the best way of
2117 if (!typespec_ok || seen_type)
2121 t = c_parser_typeof_specifier (parser);
2122 declspecs_add_type (loc, specs, t);
2128 declspecs_add_qual (specs, c_parser_peek_token (parser)->value);
2129 c_parser_consume_token (parser);
2134 attrs = c_parser_attributes (parser);
2135 declspecs_add_attrs (specs, attrs);
2144 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
2147 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
2148 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
2149 enum attributes[opt] identifier
2151 The form with trailing comma is new in C99. The forms with
2152 attributes are GNU extensions. In GNU C, we accept any expression
2153 without commas in the syntax (assignment expressions, not just
2154 conditional expressions); assignment expressions will be diagnosed
2159 enumerator-list , enumerator
2162 enumeration-constant
2163 enumeration-constant = constant-expression
2166 static struct c_typespec
2167 c_parser_enum_specifier (c_parser *parser)
2169 struct c_typespec ret;
2171 tree ident = NULL_TREE;
2172 location_t enum_loc;
2173 location_t ident_loc = UNKNOWN_LOCATION; /* Quiet warning. */
2174 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ENUM));
2175 enum_loc = c_parser_peek_token (parser)->location;
2176 c_parser_consume_token (parser);
2177 attrs = c_parser_attributes (parser);
2178 enum_loc = c_parser_peek_token (parser)->location;
2179 /* Set the location in case we create a decl now. */
2180 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
2181 if (c_parser_next_token_is (parser, CPP_NAME))
2183 ident = c_parser_peek_token (parser)->value;
2184 ident_loc = c_parser_peek_token (parser)->location;
2185 enum_loc = ident_loc;
2186 c_parser_consume_token (parser);
2188 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
2190 /* Parse an enum definition. */
2191 struct c_enum_contents the_enum;
2192 tree type = start_enum (enum_loc, &the_enum, ident);
2194 /* We chain the enumerators in reverse order, then put them in
2195 forward order at the end. */
2196 tree values = NULL_TREE;
2197 c_parser_consume_token (parser);
2205 location_t comma_loc = UNKNOWN_LOCATION; /* Quiet warning. */
2206 location_t decl_loc, value_loc;
2207 if (c_parser_next_token_is_not (parser, CPP_NAME))
2209 c_parser_error (parser, "expected identifier");
2210 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
2211 values = error_mark_node;
2214 token = c_parser_peek_token (parser);
2215 enum_id = token->value;
2216 /* Set the location in case we create a decl now. */
2217 c_parser_set_source_position_from_token (token);
2218 decl_loc = value_loc = token->location;
2219 c_parser_consume_token (parser);
2220 if (c_parser_next_token_is (parser, CPP_EQ))
2222 c_parser_consume_token (parser);
2223 value_loc = c_parser_peek_token (parser)->location;
2224 enum_value = c_parser_expr_no_commas (parser, NULL).value;
2227 enum_value = NULL_TREE;
2228 enum_decl = build_enumerator (decl_loc, value_loc,
2229 &the_enum, enum_id, enum_value);
2230 TREE_CHAIN (enum_decl) = values;
2233 if (c_parser_next_token_is (parser, CPP_COMMA))
2235 comma_loc = c_parser_peek_token (parser)->location;
2237 c_parser_consume_token (parser);
2239 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2241 if (seen_comma && !flag_isoc99)
2242 pedwarn (comma_loc, OPT_pedantic, "comma at end of enumerator list");
2243 c_parser_consume_token (parser);
2248 c_parser_error (parser, "expected %<,%> or %<}%>");
2249 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
2250 values = error_mark_node;
2254 postfix_attrs = c_parser_attributes (parser);
2255 ret.spec = finish_enum (type, nreverse (values),
2256 chainon (attrs, postfix_attrs));
2257 ret.kind = ctsk_tagdef;
2258 ret.expr = NULL_TREE;
2259 ret.expr_const_operands = true;
2264 c_parser_error (parser, "expected %<{%>");
2265 ret.spec = error_mark_node;
2266 ret.kind = ctsk_tagref;
2267 ret.expr = NULL_TREE;
2268 ret.expr_const_operands = true;
2271 ret = parser_xref_tag (ident_loc, ENUMERAL_TYPE, ident);
2272 /* In ISO C, enumerated types can be referred to only if already
2274 if (pedantic && !COMPLETE_TYPE_P (ret.spec))
2277 pedwarn (enum_loc, OPT_pedantic,
2278 "ISO C forbids forward references to %<enum%> types");
2283 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
2285 struct-or-union-specifier:
2286 struct-or-union attributes[opt] identifier[opt]
2287 { struct-contents } attributes[opt]
2288 struct-or-union attributes[opt] identifier
2291 struct-declaration-list
2293 struct-declaration-list:
2294 struct-declaration ;
2295 struct-declaration-list struct-declaration ;
2302 struct-declaration-list struct-declaration
2304 struct-declaration-list:
2305 struct-declaration-list ;
2308 (Note that in the syntax here, unlike that in ISO C, the semicolons
2309 are included here rather than in struct-declaration, in order to
2310 describe the syntax with extra semicolons and missing semicolon at
2315 struct-declaration-list:
2316 @defs ( class-name )
2318 (Note this does not include a trailing semicolon, but can be
2319 followed by further declarations, and gets a pedwarn-if-pedantic
2320 when followed by a semicolon.) */
2322 static struct c_typespec
2323 c_parser_struct_or_union_specifier (c_parser *parser)
2325 struct c_typespec ret;
2327 tree ident = NULL_TREE;
2328 location_t struct_loc;
2329 location_t ident_loc = UNKNOWN_LOCATION;
2330 enum tree_code code;
2331 switch (c_parser_peek_token (parser)->keyword)
2342 struct_loc = c_parser_peek_token (parser)->location;
2343 c_parser_consume_token (parser);
2344 attrs = c_parser_attributes (parser);
2346 /* Set the location in case we create a decl now. */
2347 c_parser_set_source_position_from_token (c_parser_peek_token (parser));
2349 if (c_parser_next_token_is (parser, CPP_NAME))
2351 ident = c_parser_peek_token (parser)->value;
2352 ident_loc = c_parser_peek_token (parser)->location;
2353 struct_loc = ident_loc;
2354 c_parser_consume_token (parser);
2356 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
2358 /* Parse a struct or union definition. Start the scope of the
2359 tag before parsing components. */
2360 struct c_struct_parse_info *struct_info;
2361 tree type = start_struct (struct_loc, code, ident, &struct_info);
2363 /* We chain the components in reverse order, then put them in
2364 forward order at the end. Each struct-declaration may
2365 declare multiple components (comma-separated), so we must use
2366 chainon to join them, although when parsing each
2367 struct-declaration we can use TREE_CHAIN directly.
2369 The theory behind all this is that there will be more
2370 semicolon separated fields than comma separated fields, and
2371 so we'll be minimizing the number of node traversals required
2373 tree contents = NULL_TREE;
2374 c_parser_consume_token (parser);
2375 /* Handle the Objective-C @defs construct,
2376 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
2377 if (c_parser_next_token_is_keyword (parser, RID_AT_DEFS))
2380 gcc_assert (c_dialect_objc ());
2381 c_parser_consume_token (parser);
2382 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2384 if (c_parser_next_token_is (parser, CPP_NAME)
2385 && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME)
2387 name = c_parser_peek_token (parser)->value;
2388 c_parser_consume_token (parser);
2392 c_parser_error (parser, "expected class name");
2393 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
2396 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2398 contents = nreverse (objc_get_class_ivars (name));
2401 /* Parse the struct-declarations and semicolons. Problems with
2402 semicolons are diagnosed here; empty structures are diagnosed
2407 /* Parse any stray semicolon. */
2408 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2410 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
2411 "extra semicolon in struct or union specified");
2412 c_parser_consume_token (parser);
2415 /* Stop if at the end of the struct or union contents. */
2416 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2418 c_parser_consume_token (parser);
2421 /* Accept #pragmas at struct scope. */
2422 if (c_parser_next_token_is (parser, CPP_PRAGMA))
2424 c_parser_pragma (parser, pragma_external);
2427 /* Parse some comma-separated declarations, but not the
2428 trailing semicolon if any. */
2429 decls = c_parser_struct_declaration (parser);
2430 contents = chainon (decls, contents);
2431 /* If no semicolon follows, either we have a parse error or
2432 are at the end of the struct or union and should
2434 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
2435 c_parser_consume_token (parser);
2438 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2439 pedwarn (c_parser_peek_token (parser)->location, 0,
2440 "no semicolon at end of struct or union");
2441 else if (parser->error
2442 || !c_parser_next_token_starts_declspecs (parser))
2444 c_parser_error (parser, "expected %<;%>");
2445 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
2449 /* If we come here, we have already emitted an error
2450 for an expected `;', identifier or `(', and we also
2451 recovered already. Go on with the next field. */
2454 postfix_attrs = c_parser_attributes (parser);
2455 ret.spec = finish_struct (struct_loc, type, nreverse (contents),
2456 chainon (attrs, postfix_attrs), struct_info);
2457 ret.kind = ctsk_tagdef;
2458 ret.expr = NULL_TREE;
2459 ret.expr_const_operands = true;
2464 c_parser_error (parser, "expected %<{%>");
2465 ret.spec = error_mark_node;
2466 ret.kind = ctsk_tagref;
2467 ret.expr = NULL_TREE;
2468 ret.expr_const_operands = true;
2471 ret = parser_xref_tag (ident_loc, code, ident);
2475 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
2476 the trailing semicolon.
2479 specifier-qualifier-list struct-declarator-list
2480 static_assert-declaration-no-semi
2482 specifier-qualifier-list:
2483 type-specifier specifier-qualifier-list[opt]
2484 type-qualifier specifier-qualifier-list[opt]
2485 attributes specifier-qualifier-list[opt]
2487 struct-declarator-list:
2489 struct-declarator-list , attributes[opt] struct-declarator
2492 declarator attributes[opt]
2493 declarator[opt] : constant-expression attributes[opt]
2498 __extension__ struct-declaration
2499 specifier-qualifier-list
2501 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
2502 of attributes where shown is a GNU extension. In GNU C, we accept
2503 any expression without commas in the syntax (assignment
2504 expressions, not just conditional expressions); assignment
2505 expressions will be diagnosed as non-constant. */
2508 c_parser_struct_declaration (c_parser *parser)
2510 struct c_declspecs *specs;
2512 tree all_prefix_attrs;
2514 location_t decl_loc;
2515 if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
2519 ext = disable_extension_diagnostics ();
2520 c_parser_consume_token (parser);
2521 decl = c_parser_struct_declaration (parser);
2522 restore_extension_diagnostics (ext);
2525 if (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT))
2527 c_parser_static_assert_declaration_no_semi (parser);
2530 specs = build_null_declspecs ();
2531 decl_loc = c_parser_peek_token (parser)->location;
2532 c_parser_declspecs (parser, specs, false, true, true, cla_nonabstract_decl);
2535 if (!specs->declspecs_seen_p)
2537 c_parser_error (parser, "expected specifier-qualifier-list");
2540 finish_declspecs (specs);
2541 if (c_parser_next_token_is (parser, CPP_SEMICOLON)
2542 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2545 if (specs->typespec_kind == ctsk_none)
2547 pedwarn (decl_loc, OPT_pedantic,
2548 "ISO C forbids member declarations with no members");
2549 shadow_tag_warned (specs, pedantic);
2554 /* Support for unnamed structs or unions as members of
2555 structs or unions (which is [a] useful and [b] supports
2559 ret = grokfield (c_parser_peek_token (parser)->location,
2560 build_id_declarator (NULL_TREE), specs,
2563 decl_attributes (&ret, attrs, 0);
2568 /* Provide better error recovery. Note that a type name here is valid,
2569 and will be treated as a field name. */
2570 if (specs->typespec_kind == ctsk_tagdef
2571 && TREE_CODE (specs->type) != ENUMERAL_TYPE
2572 && c_parser_next_token_starts_declspecs (parser)
2573 && !c_parser_next_token_is (parser, CPP_NAME))
2575 c_parser_error (parser, "expected %<;%>, identifier or %<(%>");
2576 parser->error = false;
2580 pending_xref_error ();
2581 prefix_attrs = specs->attrs;
2582 all_prefix_attrs = prefix_attrs;
2583 specs->attrs = NULL_TREE;
2587 /* Declaring one or more declarators or un-named bit-fields. */
2588 struct c_declarator *declarator;
2590 if (c_parser_next_token_is (parser, CPP_COLON))
2591 declarator = build_id_declarator (NULL_TREE);
2593 declarator = c_parser_declarator (parser,
2594 specs->typespec_kind != ctsk_none,
2595 C_DTR_NORMAL, &dummy);
2596 if (declarator == NULL)
2598 c_parser_skip_to_end_of_block_or_statement (parser);
2601 if (c_parser_next_token_is (parser, CPP_COLON)
2602 || c_parser_next_token_is (parser, CPP_COMMA)
2603 || c_parser_next_token_is (parser, CPP_SEMICOLON)
2604 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE)
2605 || c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2607 tree postfix_attrs = NULL_TREE;
2608 tree width = NULL_TREE;
2610 if (c_parser_next_token_is (parser, CPP_COLON))
2612 c_parser_consume_token (parser);
2613 width = c_parser_expr_no_commas (parser, NULL).value;
2615 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2616 postfix_attrs = c_parser_attributes (parser);
2617 d = grokfield (c_parser_peek_token (parser)->location,
2618 declarator, specs, width, &all_prefix_attrs);
2619 decl_attributes (&d, chainon (postfix_attrs,
2620 all_prefix_attrs), 0);
2621 DECL_CHAIN (d) = decls;
2623 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
2624 all_prefix_attrs = chainon (c_parser_attributes (parser),
2627 all_prefix_attrs = prefix_attrs;
2628 if (c_parser_next_token_is (parser, CPP_COMMA))
2629 c_parser_consume_token (parser);
2630 else if (c_parser_next_token_is (parser, CPP_SEMICOLON)
2631 || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
2633 /* Semicolon consumed in caller. */
2638 c_parser_error (parser, "expected %<,%>, %<;%> or %<}%>");
2644 c_parser_error (parser,
2645 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2646 "%<__attribute__%>");
2653 /* Parse a typeof specifier (a GNU extension).
2656 typeof ( expression )
2657 typeof ( type-name )
2660 static struct c_typespec
2661 c_parser_typeof_specifier (c_parser *parser)
2663 struct c_typespec ret;
2664 ret.kind = ctsk_typeof;
2665 ret.spec = error_mark_node;
2666 ret.expr = NULL_TREE;
2667 ret.expr_const_operands = true;
2668 gcc_assert (c_parser_next_token_is_keyword (parser, RID_TYPEOF));
2669 c_parser_consume_token (parser);
2670 c_inhibit_evaluation_warnings++;
2672 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
2674 c_inhibit_evaluation_warnings--;
2678 if (c_parser_next_tokens_start_typename (parser, cla_prefer_id))
2680 struct c_type_name *type = c_parser_type_name (parser);
2681 c_inhibit_evaluation_warnings--;
2685 ret.spec = groktypename (type, &ret.expr, &ret.expr_const_operands);
2686 pop_maybe_used (variably_modified_type_p (ret.spec, NULL_TREE));
2692 location_t here = c_parser_peek_token (parser)->location;
2693 struct c_expr expr = c_parser_expression (parser);
2694 c_inhibit_evaluation_warnings--;
2696 if (TREE_CODE (expr.value) == COMPONENT_REF
2697 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
2698 error_at (here, "%<typeof%> applied to a bit-field");
2699 mark_exp_read (expr.value);
2700 ret.spec = TREE_TYPE (expr.value);
2701 was_vm = variably_modified_type_p (ret.spec, NULL_TREE);
2702 /* This is returned with the type so that when the type is
2703 evaluated, this can be evaluated. */
2705 ret.expr = c_fully_fold (expr.value, false, &ret.expr_const_operands);
2706 pop_maybe_used (was_vm);
2708 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
2712 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2713 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2714 be redeclared; otherwise it may not. KIND indicates which kind of
2715 declarator is wanted. Returns a valid declarator except in the
2716 case of a syntax error in which case NULL is returned. *SEEN_ID is
2717 set to true if an identifier being declared is seen; this is used
2718 to diagnose bad forms of abstract array declarators and to
2719 determine whether an identifier list is syntactically permitted.
2722 pointer[opt] direct-declarator
2726 ( attributes[opt] declarator )
2727 direct-declarator array-declarator
2728 direct-declarator ( parameter-type-list )
2729 direct-declarator ( identifier-list[opt] )
2732 * type-qualifier-list[opt]
2733 * type-qualifier-list[opt] pointer
2735 type-qualifier-list:
2738 type-qualifier-list type-qualifier
2739 type-qualifier-list attributes
2741 parameter-type-list:
2743 parameter-list , ...
2746 parameter-declaration
2747 parameter-list , parameter-declaration
2749 parameter-declaration:
2750 declaration-specifiers declarator attributes[opt]
2751 declaration-specifiers abstract-declarator[opt] attributes[opt]
2755 identifier-list , identifier
2757 abstract-declarator:
2759 pointer[opt] direct-abstract-declarator
2761 direct-abstract-declarator:
2762 ( attributes[opt] abstract-declarator )
2763 direct-abstract-declarator[opt] array-declarator
2764 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2769 direct-declarator ( parameter-forward-declarations
2770 parameter-type-list[opt] )
2772 direct-abstract-declarator:
2773 direct-abstract-declarator[opt] ( parameter-forward-declarations
2774 parameter-type-list[opt] )
2776 parameter-forward-declarations:
2778 parameter-forward-declarations parameter-list ;
2780 The uses of attributes shown above are GNU extensions.
2782 Some forms of array declarator are not included in C99 in the
2783 syntax for abstract declarators; these are disallowed elsewhere.
2784 This may be a defect (DR#289).
2786 This function also accepts an omitted abstract declarator as being
2787 an abstract declarator, although not part of the formal syntax. */
2789 static struct c_declarator *
2790 c_parser_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2793 /* Parse any initial pointer part. */
2794 if (c_parser_next_token_is (parser, CPP_MULT))
2796 struct c_declspecs *quals_attrs = build_null_declspecs ();
2797 struct c_declarator *inner;
2798 c_parser_consume_token (parser);
2799 c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
2800 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2804 return make_pointer_declarator (quals_attrs, inner);
2806 /* Now we have a direct declarator, direct abstract declarator or
2807 nothing (which counts as a direct abstract declarator here). */
2808 return c_parser_direct_declarator (parser, type_seen_p, kind, seen_id);
2811 /* Parse a direct declarator or direct abstract declarator; arguments
2812 as c_parser_declarator. */
2814 static struct c_declarator *
2815 c_parser_direct_declarator (c_parser *parser, bool type_seen_p, c_dtr_syn kind,
2818 /* The direct declarator must start with an identifier (possibly
2819 omitted) or a parenthesized declarator (possibly abstract). In
2820 an ordinary declarator, initial parentheses must start a
2821 parenthesized declarator. In an abstract declarator or parameter
2822 declarator, they could start a parenthesized declarator or a
2823 parameter list. To tell which, the open parenthesis and any
2824 following attributes must be read. If a declaration specifier
2825 follows, then it is a parameter list; if the specifier is a
2826 typedef name, there might be an ambiguity about redeclaring it,
2827 which is resolved in the direction of treating it as a typedef
2828 name. If a close parenthesis follows, it is also an empty
2829 parameter list, as the syntax does not permit empty abstract
2830 declarators. Otherwise, it is a parenthesized declarator (in
2831 which case the analysis may be repeated inside it, recursively).
2833 ??? There is an ambiguity in a parameter declaration "int
2834 (__attribute__((foo)) x)", where x is not a typedef name: it
2835 could be an abstract declarator for a function, or declare x with
2836 parentheses. The proper resolution of this ambiguity needs
2837 documenting. At present we follow an accident of the old
2838 parser's implementation, whereby the first parameter must have
2839 some declaration specifiers other than just attributes. Thus as
2840 a parameter declaration it is treated as a parenthesized
2841 parameter named x, and as an abstract declarator it is
2844 ??? Also following the old parser, attributes inside an empty
2845 parameter list are ignored, making it a list not yielding a
2846 prototype, rather than giving an error or making it have one
2847 parameter with implicit type int.
2849 ??? Also following the old parser, typedef names may be
2850 redeclared in declarators, but not Objective-C class names. */
2852 if (kind != C_DTR_ABSTRACT
2853 && c_parser_next_token_is (parser, CPP_NAME)
2855 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
2856 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
2857 || c_parser_peek_token (parser)->id_kind == C_ID_ID))
2859 struct c_declarator *inner
2860 = build_id_declarator (c_parser_peek_token (parser)->value);
2862 inner->id_loc = c_parser_peek_token (parser)->location;
2863 c_parser_consume_token (parser);
2864 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2867 if (kind != C_DTR_NORMAL
2868 && c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2870 struct c_declarator *inner = build_id_declarator (NULL_TREE);
2871 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2874 /* Either we are at the end of an abstract declarator, or we have
2877 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
2880 struct c_declarator *inner;
2881 c_parser_consume_token (parser);
2882 attrs = c_parser_attributes (parser);
2883 if (kind != C_DTR_NORMAL
2884 && (c_parser_next_token_starts_declspecs (parser)
2885 || c_parser_next_token_is (parser, CPP_CLOSE_PAREN)))
2887 struct c_arg_info *args
2888 = c_parser_parms_declarator (parser, kind == C_DTR_NORMAL,
2895 = build_function_declarator (args,
2896 build_id_declarator (NULL_TREE));
2897 return c_parser_direct_declarator_inner (parser, *seen_id,
2901 /* A parenthesized declarator. */
2902 inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
2903 if (inner != NULL && attrs != NULL)
2904 inner = build_attrs_declarator (attrs, inner);
2905 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
2907 c_parser_consume_token (parser);
2911 return c_parser_direct_declarator_inner (parser, *seen_id, inner);
2915 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
2922 if (kind == C_DTR_NORMAL)
2924 c_parser_error (parser, "expected identifier or %<(%>");
2928 return build_id_declarator (NULL_TREE);
2932 /* Parse part of a direct declarator or direct abstract declarator,
2933 given that some (in INNER) has already been parsed; ID_PRESENT is
2934 true if an identifier is present, false for an abstract
2937 static struct c_declarator *
2938 c_parser_direct_declarator_inner (c_parser *parser, bool id_present,
2939 struct c_declarator *inner)
2941 /* Parse a sequence of array declarators and parameter lists. */
2942 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
2944 location_t brace_loc = c_parser_peek_token (parser)->location;
2945 struct c_declarator *declarator;
2946 struct c_declspecs *quals_attrs = build_null_declspecs ();
2950 c_parser_consume_token (parser);
2951 c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
2952 static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
2954 c_parser_consume_token (parser);
2955 if (static_seen && !quals_attrs->declspecs_seen_p)
2956 c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
2957 if (!quals_attrs->declspecs_seen_p)
2959 /* If "static" is present, there must be an array dimension.
2960 Otherwise, there may be a dimension, "*", or no
2965 dimen = c_parser_expr_no_commas (parser, NULL).value;
2969 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2974 else if (c_parser_next_token_is (parser, CPP_MULT))
2976 if (c_parser_peek_2nd_token (parser)->type == CPP_CLOSE_SQUARE)
2980 c_parser_consume_token (parser);
2985 dimen = c_parser_expr_no_commas (parser, NULL).value;
2991 dimen = c_parser_expr_no_commas (parser, NULL).value;
2994 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
2995 c_parser_consume_token (parser);
2998 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3003 mark_exp_read (dimen);
3004 declarator = build_array_declarator (brace_loc, dimen, quals_attrs,
3005 static_seen, star_seen);
3006 if (declarator == NULL)
3008 inner = set_array_declarator_inner (declarator, inner);
3009 return c_parser_direct_declarator_inner (parser, id_present, inner);
3011 else if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
3014 struct c_arg_info *args;
3015 c_parser_consume_token (parser);
3016 attrs = c_parser_attributes (parser);
3017 args = c_parser_parms_declarator (parser, id_present, attrs);
3022 inner = build_function_declarator (args, inner);
3023 return c_parser_direct_declarator_inner (parser, id_present, inner);
3029 /* Parse a parameter list or identifier list, including the closing
3030 parenthesis but not the opening one. ATTRS are the attributes at
3031 the start of the list. ID_LIST_OK is true if an identifier list is
3032 acceptable; such a list must not have attributes at the start. */
3034 static struct c_arg_info *
3035 c_parser_parms_declarator (c_parser *parser, bool id_list_ok, tree attrs)
3038 declare_parm_level ();
3039 /* If the list starts with an identifier, it is an identifier list.
3040 Otherwise, it is either a prototype list or an empty list. */
3043 && c_parser_next_token_is (parser, CPP_NAME)
3044 && c_parser_peek_token (parser)->id_kind == C_ID_ID
3046 /* Look ahead to detect typos in type names. */
3047 && c_parser_peek_2nd_token (parser)->type != CPP_NAME
3048 && c_parser_peek_2nd_token (parser)->type != CPP_MULT
3049 && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_PAREN
3050 && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_SQUARE)
3052 tree list = NULL_TREE, *nextp = &list;
3053 while (c_parser_next_token_is (parser, CPP_NAME)
3054 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
3056 *nextp = build_tree_list (NULL_TREE,
3057 c_parser_peek_token (parser)->value);
3058 nextp = & TREE_CHAIN (*nextp);
3059 c_parser_consume_token (parser);
3060 if (c_parser_next_token_is_not (parser, CPP_COMMA))
3062 c_parser_consume_token (parser);
3063 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3065 c_parser_error (parser, "expected identifier");
3069 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3071 struct c_arg_info *ret = build_arg_info ();
3073 c_parser_consume_token (parser);
3079 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3087 struct c_arg_info *ret = c_parser_parms_list_declarator (parser, attrs);
3093 /* Parse a parameter list (possibly empty), including the closing
3094 parenthesis but not the opening one. ATTRS are the attributes at
3095 the start of the list. */
3097 static struct c_arg_info *
3098 c_parser_parms_list_declarator (c_parser *parser, tree attrs)
3100 bool bad_parm = false;
3101 /* ??? Following the old parser, forward parameter declarations may
3102 use abstract declarators, and if no real parameter declarations
3103 follow the forward declarations then this is not diagnosed. Also
3104 note as above that attributes are ignored as the only contents of
3105 the parentheses, or as the only contents after forward
3107 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3109 struct c_arg_info *ret = build_arg_info ();
3110 c_parser_consume_token (parser);
3113 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3115 struct c_arg_info *ret = build_arg_info ();
3116 /* Suppress -Wold-style-definition for this case. */
3117 ret->types = error_mark_node;
3118 error_at (c_parser_peek_token (parser)->location,
3119 "ISO C requires a named argument before %<...%>");
3120 c_parser_consume_token (parser);
3121 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3123 c_parser_consume_token (parser);
3128 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3133 /* Nonempty list of parameters, either terminated with semicolon
3134 (forward declarations; recurse) or with close parenthesis (normal
3135 function) or with ", ... )" (variadic function). */
3138 /* Parse a parameter. */
3139 struct c_parm *parm = c_parser_parameter_declaration (parser, attrs);
3144 push_parm_decl (parm);
3145 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
3148 c_parser_consume_token (parser);
3149 mark_forward_parm_decls ();
3150 new_attrs = c_parser_attributes (parser);
3151 return c_parser_parms_list_declarator (parser, new_attrs);
3153 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3155 c_parser_consume_token (parser);
3158 get_pending_sizes ();
3162 return get_parm_info (false);
3164 if (!c_parser_require (parser, CPP_COMMA,
3165 "expected %<;%>, %<,%> or %<)%>"))
3167 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
3168 get_pending_sizes ();
3171 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3173 c_parser_consume_token (parser);
3174 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3176 c_parser_consume_token (parser);
3179 get_pending_sizes ();
3183 return get_parm_info (true);
3187 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3189 get_pending_sizes ();
3196 /* Parse a parameter declaration. ATTRS are the attributes at the
3197 start of the declaration if it is the first parameter. */
3199 static struct c_parm *
3200 c_parser_parameter_declaration (c_parser *parser, tree attrs)
3202 struct c_declspecs *specs;
3203 struct c_declarator *declarator;
3205 tree postfix_attrs = NULL_TREE;
3207 if (!c_parser_next_token_starts_declspecs (parser))
3209 c_token *token = c_parser_peek_token (parser);
3212 c_parser_set_source_position_from_token (token);
3213 if (c_parser_next_tokens_start_typename (parser, cla_prefer_type))
3215 error ("unknown type name %qE", token->value);
3216 parser->error = true;
3218 /* ??? In some Objective-C cases '...' isn't applicable so there
3219 should be a different message. */
3221 c_parser_error (parser,
3222 "expected declaration specifiers or %<...%>");
3223 c_parser_skip_to_end_of_parameter (parser);
3226 specs = build_null_declspecs ();
3229 declspecs_add_attrs (specs, attrs);
3232 c_parser_declspecs (parser, specs, true, true, true, cla_nonabstract_decl);
3233 finish_declspecs (specs);
3234 pending_xref_error ();
3235 prefix_attrs = specs->attrs;
3236 specs->attrs = NULL_TREE;
3237 declarator = c_parser_declarator (parser,
3238 specs->typespec_kind != ctsk_none,
3239 C_DTR_PARM, &dummy);
3240 if (declarator == NULL)
3242 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3245 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
3246 postfix_attrs = c_parser_attributes (parser);
3247 return build_c_parm (specs, chainon (postfix_attrs, prefix_attrs),
3251 /* Parse a string literal in an asm expression. It should not be
3252 translated, and wide string literals are an error although
3253 permitted by the syntax. This is a GNU extension.
3258 ??? At present, following the old parser, the caller needs to have
3259 set lex_untranslated_string to 1. It would be better to follow the
3260 C++ parser rather than using this kludge. */
3263 c_parser_asm_string_literal (c_parser *parser)
3266 int save_flag = warn_overlength_strings;
3267 warn_overlength_strings = 0;
3268 if (c_parser_next_token_is (parser, CPP_STRING))
3270 str = c_parser_peek_token (parser)->value;
3271 c_parser_consume_token (parser);
3273 else if (c_parser_next_token_is (parser, CPP_WSTRING))
3275 error_at (c_parser_peek_token (parser)->location,
3276 "wide string literal in %<asm%>");
3277 str = build_string (1, "");
3278 c_parser_consume_token (parser);
3282 c_parser_error (parser, "expected string literal");
3285 warn_overlength_strings = save_flag;
3289 /* Parse a simple asm expression. This is used in restricted
3290 contexts, where a full expression with inputs and outputs does not
3291 make sense. This is a GNU extension.
3294 asm ( asm-string-literal )
3298 c_parser_simple_asm_expr (c_parser *parser)
3301 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
3302 /* ??? Follow the C++ parser rather than using the
3303 lex_untranslated_string kludge. */
3304 parser->lex_untranslated_string = true;
3305 c_parser_consume_token (parser);
3306 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3308 parser->lex_untranslated_string = false;
3311 str = c_parser_asm_string_literal (parser);
3312 parser->lex_untranslated_string = false;
3313 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
3315 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
3321 /* Parse (possibly empty) attributes. This is a GNU extension.
3325 attributes attribute
3328 __attribute__ ( ( attribute-list ) )
3332 attribute_list , attrib
3337 any-word ( identifier )
3338 any-word ( identifier , nonempty-expr-list )
3339 any-word ( expr-list )
3341 where the "identifier" must not be declared as a type, and
3342 "any-word" may be any identifier (including one declared as a
3343 type), a reserved word storage class specifier, type specifier or
3344 type qualifier. ??? This still leaves out most reserved keywords
3345 (following the old parser), shouldn't we include them, and why not
3346 allow identifiers declared as types to start the arguments? */
3349 c_parser_attributes (c_parser *parser)
3351 tree attrs = NULL_TREE;
3352 while (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
3354 /* ??? Follow the C++ parser rather than using the
3355 lex_untranslated_string kludge. */
3356 parser->lex_untranslated_string = true;
3357 c_parser_consume_token (parser);
3358 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3360 parser->lex_untranslated_string = false;
3363 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
3365 parser->lex_untranslated_string = false;
3366 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
3369 /* Parse the attribute list. */
3370 while (c_parser_next_token_is (parser, CPP_COMMA)
3371 || c_parser_next_token_is (parser, CPP_NAME)
3372 || c_parser_next_token_is (parser, CPP_KEYWORD))
3374 tree attr, attr_name, attr_args;
3375 VEC(tree,gc) *expr_list;
3376 if (c_parser_next_token_is (parser, CPP_COMMA))
3378 c_parser_consume_token (parser);
3381 if (c_parser_next_token_is (parser, CPP_KEYWORD))
3383 /* ??? See comment above about what keywords are
3386 switch (c_parser_peek_token (parser)->keyword)
3424 /* Accept __attribute__((__const)) as __attribute__((const))
3427 = ridpointers[(int) c_parser_peek_token (parser)->keyword];
3430 attr_name = c_parser_peek_token (parser)->value;
3431 c_parser_consume_token (parser);
3432 if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
3434 attr = build_tree_list (attr_name, NULL_TREE);
3435 attrs = chainon (attrs, attr);
3438 c_parser_consume_token (parser);
3439 /* Parse the attribute contents. If they start with an
3440 identifier which is followed by a comma or close
3441 parenthesis, then the arguments start with that
3442 identifier; otherwise they are an expression list.
3443 In objective-c the identifier may be a classname. */
3444 if (c_parser_next_token_is (parser, CPP_NAME)
3445 && (c_parser_peek_token (parser)->id_kind == C_ID_ID
3446 || (c_dialect_objc ()
3447 && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
3448 && ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA)
3449 || (c_parser_peek_2nd_token (parser)->type
3450 == CPP_CLOSE_PAREN)))
3452 tree arg1 = c_parser_peek_token (parser)->value;
3453 c_parser_consume_token (parser);
3454 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3455 attr_args = build_tree_list (NULL_TREE, arg1);
3459 c_parser_consume_token (parser);
3460 expr_list = c_parser_expr_list (parser, false, true, NULL);
3461 tree_list = build_tree_list_vec (expr_list);
3462 attr_args = tree_cons (NULL_TREE, arg1, tree_list);
3463 release_tree_vector (expr_list);
3468 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3469 attr_args = NULL_TREE;
3472 expr_list = c_parser_expr_list (parser, false, true, NULL);
3473 attr_args = build_tree_list_vec (expr_list);
3474 release_tree_vector (expr_list);
3477 attr = build_tree_list (attr_name, attr_args);
3478 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3479 c_parser_consume_token (parser);
3482 parser->lex_untranslated_string = false;
3483 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3487 attrs = chainon (attrs, attr);
3489 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3490 c_parser_consume_token (parser);
3493 parser->lex_untranslated_string = false;
3494 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3498 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
3499 c_parser_consume_token (parser);
3502 parser->lex_untranslated_string = false;
3503 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
3507 parser->lex_untranslated_string = false;
3512 /* Parse a type name (C90 6.5.5, C99 6.7.6).
3515 specifier-qualifier-list abstract-declarator[opt]
3518 static struct c_type_name *
3519 c_parser_type_name (c_parser *parser)
3521 struct c_declspecs *specs = build_null_declspecs ();
3522 struct c_declarator *declarator;
3523 struct c_type_name *ret;
3525 c_parser_declspecs (parser, specs, false, true, true, cla_prefer_type);
3526 if (!specs->declspecs_seen_p)
3528 c_parser_error (parser, "expected specifier-qualifier-list");
3531 if (specs->type != error_mark_node)
3533 pending_xref_error ();
3534 finish_declspecs (specs);
3536 declarator = c_parser_declarator (parser,
3537 specs->typespec_kind != ctsk_none,
3538 C_DTR_ABSTRACT, &dummy);
3539 if (declarator == NULL)
3541 ret = XOBNEW (&parser_obstack, struct c_type_name);
3543 ret->declarator = declarator;
3547 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
3550 assignment-expression
3551 { initializer-list }
3552 { initializer-list , }
3555 designation[opt] initializer
3556 initializer-list , designation[opt] initializer
3563 designator-list designator
3570 [ constant-expression ]
3582 [ constant-expression ... constant-expression ]
3584 Any expression without commas is accepted in the syntax for the
3585 constant-expressions, with non-constant expressions rejected later.
3587 This function is only used for top-level initializers; for nested
3588 ones, see c_parser_initval. */
3590 static struct c_expr
3591 c_parser_initializer (c_parser *parser)
3593 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
3594 return c_parser_braced_init (parser, NULL_TREE, false);
3598 location_t loc = c_parser_peek_token (parser)->location;
3599 ret = c_parser_expr_no_commas (parser, NULL);
3600 if (TREE_CODE (ret.value) != STRING_CST
3601 && TREE_CODE (ret.value) != COMPOUND_LITERAL_EXPR)
3602 ret = default_function_array_read_conversion (loc, ret);
3607 /* Parse a braced initializer list. TYPE is the type specified for a
3608 compound literal, and NULL_TREE for other initializers and for
3609 nested braced lists. NESTED_P is true for nested braced lists,
3610 false for the list of a compound literal or the list that is the
3611 top-level initializer in a declaration. */
3613 static struct c_expr
3614 c_parser_braced_init (c_parser *parser, tree type, bool nested_p)
3617 struct obstack braced_init_obstack;
3618 location_t brace_loc = c_parser_peek_token (parser)->location;
3619 gcc_obstack_init (&braced_init_obstack);
3620 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
3621 c_parser_consume_token (parser);
3623 push_init_level (0, &braced_init_obstack);
3625 really_start_incremental_init (type);
3626 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3628 pedwarn (brace_loc, OPT_pedantic, "ISO C forbids empty initializer braces");
3632 /* Parse a non-empty initializer list, possibly with a trailing
3636 c_parser_initelt (parser, &braced_init_obstack);
3639 if (c_parser_next_token_is (parser, CPP_COMMA))
3640 c_parser_consume_token (parser);
3643 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3647 if (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
3649 ret.value = error_mark_node;
3650 ret.original_code = ERROR_MARK;
3651 ret.original_type = NULL;
3652 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, "expected %<}%>");
3653 pop_init_level (0, &braced_init_obstack);
3654 obstack_free (&braced_init_obstack, NULL);
3657 c_parser_consume_token (parser);
3658 ret = pop_init_level (0, &braced_init_obstack);
3659 obstack_free (&braced_init_obstack, NULL);
3663 /* Parse a nested initializer, including designators. */
3666 c_parser_initelt (c_parser *parser, struct obstack * braced_init_obstack)
3668 /* Parse any designator or designator list. A single array
3669 designator may have the subsequent "=" omitted in GNU C, but a
3670 longer list or a structure member designator may not. */
3671 if (c_parser_next_token_is (parser, CPP_NAME)
3672 && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
3674 /* Old-style structure member designator. */
3675 set_init_label (c_parser_peek_token (parser)->value,
3676 braced_init_obstack);
3677 /* Use the colon as the error location. */
3678 pedwarn (c_parser_peek_2nd_token (parser)->location, OPT_pedantic,
3679 "obsolete use of designated initializer with %<:%>");
3680 c_parser_consume_token (parser);
3681 c_parser_consume_token (parser);
3685 /* des_seen is 0 if there have been no designators, 1 if there
3686 has been a single array designator and 2 otherwise. */
3688 /* Location of a designator. */
3689 location_t des_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3690 while (c_parser_next_token_is (parser, CPP_OPEN_SQUARE)
3691 || c_parser_next_token_is (parser, CPP_DOT))
3693 int des_prev = des_seen;
3695 des_loc = c_parser_peek_token (parser)->location;
3698 if (c_parser_next_token_is (parser, CPP_DOT))
3701 c_parser_consume_token (parser);
3702 if (c_parser_next_token_is (parser, CPP_NAME))
3704 set_init_label (c_parser_peek_token (parser)->value,
3705 braced_init_obstack);
3706 c_parser_consume_token (parser);
3711 init.value = error_mark_node;
3712 init.original_code = ERROR_MARK;
3713 init.original_type = NULL;
3714 c_parser_error (parser, "expected identifier");
3715 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3716 process_init_element (init, false, braced_init_obstack);
3723 location_t ellipsis_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3724 /* ??? Following the old parser, [ objc-receiver
3725 objc-message-args ] is accepted as an initializer,
3726 being distinguished from a designator by what follows
3727 the first assignment expression inside the square
3728 brackets, but after a first array designator a
3729 subsequent square bracket is for Objective-C taken to
3730 start an expression, using the obsolete form of
3731 designated initializer without '=', rather than
3732 possibly being a second level of designation: in LALR
3733 terms, the '[' is shifted rather than reducing
3734 designator to designator-list. */
3735 if (des_prev == 1 && c_dialect_objc ())
3737 des_seen = des_prev;
3740 if (des_prev == 0 && c_dialect_objc ())
3742 /* This might be an array designator or an
3743 Objective-C message expression. If the former,
3744 continue parsing here; if the latter, parse the
3745 remainder of the initializer given the starting
3746 primary-expression. ??? It might make sense to
3747 distinguish when des_prev == 1 as well; see
3748 previous comment. */
3750 struct c_expr mexpr;
3751 c_parser_consume_token (parser);
3752 if (c_parser_peek_token (parser)->type == CPP_NAME
3753 && ((c_parser_peek_token (parser)->id_kind
3755 || (c_parser_peek_token (parser)->id_kind
3756 == C_ID_CLASSNAME)))
3758 /* Type name receiver. */
3759 tree id = c_parser_peek_token (parser)->value;
3760 c_parser_consume_token (parser);
3761 rec = objc_get_class_reference (id);
3762 goto parse_message_args;
3764 first = c_parser_expr_no_commas (parser, NULL).value;
3765 mark_exp_read (first);
3766 if (c_parser_next_token_is (parser, CPP_ELLIPSIS)
3767 || c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3768 goto array_desig_after_first;
3769 /* Expression receiver. So far only one part
3770 without commas has been parsed; there might be
3771 more of the expression. */
3773 while (c_parser_next_token_is (parser, CPP_COMMA))
3776 location_t comma_loc, exp_loc;
3777 comma_loc = c_parser_peek_token (parser)->location;
3778 c_parser_consume_token (parser);
3779 exp_loc = c_parser_peek_token (parser)->location;
3780 next = c_parser_expr_no_commas (parser, NULL);
3781 next = default_function_array_read_conversion (exp_loc,
3783 rec = build_compound_expr (comma_loc, rec, next.value);
3786 /* Now parse the objc-message-args. */
3787 args = c_parser_objc_message_args (parser);
3788 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3791 = objc_build_message_expr (rec, args);
3792 mexpr.original_code = ERROR_MARK;
3793 mexpr.original_type = NULL;
3794 /* Now parse and process the remainder of the
3795 initializer, starting with this message
3796 expression as a primary-expression. */
3797 c_parser_initval (parser, &mexpr, braced_init_obstack);
3800 c_parser_consume_token (parser);
3801 first = c_parser_expr_no_commas (parser, NULL).value;
3802 mark_exp_read (first);
3803 array_desig_after_first:
3804 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
3806 ellipsis_loc = c_parser_peek_token (parser)->location;
3807 c_parser_consume_token (parser);
3808 second = c_parser_expr_no_commas (parser, NULL).value;
3809 mark_exp_read (second);
3813 if (c_parser_next_token_is (parser, CPP_CLOSE_SQUARE))
3815 c_parser_consume_token (parser);
3816 set_init_index (first, second, braced_init_obstack);
3818 pedwarn (ellipsis_loc, OPT_pedantic,
3819 "ISO C forbids specifying range of elements to initialize");
3822 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
3828 if (c_parser_next_token_is (parser, CPP_EQ))
3831 pedwarn (des_loc, OPT_pedantic,
3832 "ISO C90 forbids specifying subobject to initialize");
3833 c_parser_consume_token (parser);
3838 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
3839 "obsolete use of designated initializer without %<=%>");
3843 init.value = error_mark_node;
3844 init.original_code = ERROR_MARK;
3845 init.original_type = NULL;
3846 c_parser_error (parser, "expected %<=%>");
3847 c_parser_skip_until_found (parser, CPP_COMMA, NULL);
3848 process_init_element (init, false, braced_init_obstack);
3854 c_parser_initval (parser, NULL, braced_init_obstack);
3857 /* Parse a nested initializer; as c_parser_initializer but parses
3858 initializers within braced lists, after any designators have been
3859 applied. If AFTER is not NULL then it is an Objective-C message
3860 expression which is the primary-expression starting the
3864 c_parser_initval (c_parser *parser, struct c_expr *after,
3865 struct obstack * braced_init_obstack)
3868 gcc_assert (!after || c_dialect_objc ());
3869 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE) && !after)
3870 init = c_parser_braced_init (parser, NULL_TREE, true);
3873 location_t loc = c_parser_peek_token (parser)->location;
3874 init = c_parser_expr_no_commas (parser, after);
3875 if (init.value != NULL_TREE
3876 && TREE_CODE (init.value) != STRING_CST
3877 && TREE_CODE (init.value) != COMPOUND_LITERAL_EXPR)
3878 init = default_function_array_read_conversion (loc, init);
3880 process_init_element (init, false, braced_init_obstack);
3883 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3887 { block-item-list[opt] }
3888 { label-declarations block-item-list }
3892 block-item-list block-item
3904 { label-declarations block-item-list }
3907 __extension__ nested-declaration
3908 nested-function-definition
3912 label-declarations label-declaration
3915 __label__ identifier-list ;
3917 Allowing the mixing of declarations and code is new in C99. The
3918 GNU syntax also permits (not shown above) labels at the end of
3919 compound statements, which yield an error. We don't allow labels
3920 on declarations; this might seem like a natural extension, but
3921 there would be a conflict between attributes on the label and
3922 prefix attributes on the declaration. ??? The syntax follows the
3923 old parser in requiring something after label declarations.
3924 Although they are erroneous if the labels declared aren't defined,
3925 is it useful for the syntax to be this way?
3937 c_parser_compound_statement (c_parser *parser)
3940 location_t brace_loc;
3941 brace_loc = c_parser_peek_token (parser)->location;
3942 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
3944 /* Ensure a scope is entered and left anyway to avoid confusion
3945 if we have just prepared to enter a function body. */
3946 stmt = c_begin_compound_stmt (true);
3947 c_end_compound_stmt (brace_loc, stmt, true);
3948 return error_mark_node;
3950 stmt = c_begin_compound_stmt (true);
3951 c_parser_compound_statement_nostart (parser);
3952 return c_end_compound_stmt (brace_loc, stmt, true);
3955 /* Parse a compound statement except for the opening brace. This is
3956 used for parsing both compound statements and statement expressions
3957 (which follow different paths to handling the opening). */
3960 c_parser_compound_statement_nostart (c_parser *parser)
3962 bool last_stmt = false;
3963 bool last_label = false;
3964 bool save_valid_for_pragma = valid_location_for_stdc_pragma_p ();
3965 location_t label_loc = UNKNOWN_LOCATION; /* Quiet warning. */
3966 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
3968 c_parser_consume_token (parser);
3971 mark_valid_location_for_stdc_pragma (true);
3972 if (c_parser_next_token_is_keyword (parser, RID_LABEL))
3974 /* Read zero or more forward-declarations for labels that nested
3975 functions can jump to. */
3976 mark_valid_location_for_stdc_pragma (false);
3977 while (c_parser_next_token_is_keyword (parser, RID_LABEL))
3979 label_loc = c_parser_peek_token (parser)->location;
3980 c_parser_consume_token (parser);
3981 /* Any identifiers, including those declared as type names,
3986 if (c_parser_next_token_is_not (parser, CPP_NAME))
3988 c_parser_error (parser, "expected identifier");
3992 = declare_label (c_parser_peek_token (parser)->value);
3993 C_DECLARED_LABEL_FLAG (label) = 1;
3994 add_stmt (build_stmt (label_loc, DECL_EXPR, label));
3995 c_parser_consume_token (parser);
3996 if (c_parser_next_token_is (parser, CPP_COMMA))
3997 c_parser_consume_token (parser);
4001 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4003 pedwarn (label_loc, OPT_pedantic, "ISO C forbids label declarations");
4005 /* We must now have at least one statement, label or declaration. */
4006 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
4008 mark_valid_location_for_stdc_pragma (save_valid_for_pragma);
4009 c_parser_error (parser, "expected declaration or statement");
4010 c_parser_consume_token (parser);
4013 while (c_parser_next_token_is_not (parser, CPP_CLOSE_BRACE))
4015 location_t loc = c_parser_peek_token (parser)->location;
4016 if (c_parser_next_token_is_keyword (parser, RID_CASE)
4017 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
4018 || (c_parser_next_token_is (parser, CPP_NAME)
4019 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
4021 if (c_parser_next_token_is_keyword (parser, RID_CASE))
4022 label_loc = c_parser_peek_2nd_token (parser)->location;
4024 label_loc = c_parser_peek_token (parser)->location;
4027 mark_valid_location_for_stdc_pragma (false);
4028 c_parser_label (parser);
4030 else if (!last_label
4031 && c_parser_next_tokens_start_declaration (parser))
4034 mark_valid_location_for_stdc_pragma (false);
4035 c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL);
4038 (pedantic && !flag_isoc99)
4040 : OPT_Wdeclaration_after_statement,
4041 "ISO C90 forbids mixed declarations and code");
4044 else if (!last_label
4045 && c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4047 /* __extension__ can start a declaration, but is also an
4048 unary operator that can start an expression. Consume all
4049 but the last of a possible series of __extension__ to
4051 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4052 && (c_parser_peek_2nd_token (parser)->keyword
4054 c_parser_consume_token (parser);
4055 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser)))
4058 ext = disable_extension_diagnostics ();
4059 c_parser_consume_token (parser);
4061 mark_valid_location_for_stdc_pragma (false);
4062 c_parser_declaration_or_fndef (parser, true, true, true, true,
4064 /* Following the old parser, __extension__ does not
4065 disable this diagnostic. */
4066 restore_extension_diagnostics (ext);
4068 pedwarn_c90 (loc, (pedantic && !flag_isoc99)
4070 : OPT_Wdeclaration_after_statement,
4071 "ISO C90 forbids mixed declarations and code");
4077 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
4079 /* External pragmas, and some omp pragmas, are not associated
4080 with regular c code, and so are not to be considered statements
4081 syntactically. This ensures that the user doesn't put them
4082 places that would turn into syntax errors if the directive
4084 if (c_parser_pragma (parser, pragma_compound))
4085 last_label = false, last_stmt = true;
4087 else if (c_parser_next_token_is (parser, CPP_EOF))
4089 mark_valid_location_for_stdc_pragma (save_valid_for_pragma);
4090 c_parser_error (parser, "expected declaration or statement");
4093 else if (c_parser_next_token_is_keyword (parser, RID_ELSE))
4095 if (parser->in_if_block)
4097 mark_valid_location_for_stdc_pragma (save_valid_for_pragma);
4098 error_at (loc, """expected %<}%> before %<else%>");
4103 error_at (loc, "%<else%> without a previous %<if%>");
4104 c_parser_consume_token (parser);
4113 mark_valid_location_for_stdc_pragma (false);
4114 c_parser_statement_after_labels (parser);
4117 parser->error = false;
4120 error_at (label_loc, "label at end of compound statement");
4121 c_parser_consume_token (parser);
4122 /* Restore the value we started with. */
4123 mark_valid_location_for_stdc_pragma (save_valid_for_pragma);
4126 /* Parse a label (C90 6.6.1, C99 6.8.1).
4129 identifier : attributes[opt]
4130 case constant-expression :
4136 case constant-expression ... constant-expression :
4138 The use of attributes on labels is a GNU extension. The syntax in
4139 GNU C accepts any expressions without commas, non-constant
4140 expressions being rejected later. */
4143 c_parser_label (c_parser *parser)
4145 location_t loc1 = c_parser_peek_token (parser)->location;
4146 tree label = NULL_TREE;
4147 if (c_parser_next_token_is_keyword (parser, RID_CASE))
4150 c_parser_consume_token (parser);
4151 exp1 = c_parser_expr_no_commas (parser, NULL).value;
4152 if (c_parser_next_token_is (parser, CPP_COLON))
4154 c_parser_consume_token (parser);
4155 label = do_case (loc1, exp1, NULL_TREE);
4157 else if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
4159 c_parser_consume_token (parser);
4160 exp2 = c_parser_expr_no_commas (parser, NULL).value;
4161 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4162 label = do_case (loc1, exp1, exp2);
4165 c_parser_error (parser, "expected %<:%> or %<...%>");
4167 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
4169 c_parser_consume_token (parser);
4170 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
4171 label = do_case (loc1, NULL_TREE, NULL_TREE);
4175 tree name = c_parser_peek_token (parser)->value;
4178 location_t loc2 = c_parser_peek_token (parser)->location;
4179 gcc_assert (c_parser_next_token_is (parser, CPP_NAME));
4180 c_parser_consume_token (parser);
4181 gcc_assert (c_parser_next_token_is (parser, CPP_COLON));
4182 c_parser_consume_token (parser);
4183 attrs = c_parser_attributes (parser);
4184 tlab = define_label (loc2, name);
4187 decl_attributes (&tlab, attrs, 0);
4188 label = add_stmt (build_stmt (loc1, LABEL_EXPR, tlab));
4193 if (c_parser_next_tokens_start_declaration (parser))
4195 error_at (c_parser_peek_token (parser)->location,
4196 "a label can only be part of a statement and "
4197 "a declaration is not a statement");
4198 c_parser_declaration_or_fndef (parser, /*fndef_ok*/ false,
4199 /*static_assert_ok*/ true,
4200 /*nested*/ true, /*empty_ok*/ false,
4201 /*start_attr_ok*/ true, NULL);
4206 /* Parse a statement (C90 6.6, C99 6.8).
4211 expression-statement
4219 expression-statement:
4222 selection-statement:
4226 iteration-statement:
4235 return expression[opt] ;
4248 objc-throw-statement
4249 objc-try-catch-statement
4250 objc-synchronized-statement
4252 objc-throw-statement:
4266 parallel-for-construct
4267 parallel-sections-construct
4274 parallel-directive structured-block
4277 for-directive iteration-statement
4280 sections-directive section-scope
4283 single-directive structured-block
4285 parallel-for-construct:
4286 parallel-for-directive iteration-statement
4288 parallel-sections-construct:
4289 parallel-sections-directive section-scope
4292 master-directive structured-block
4295 critical-directive structured-block
4298 atomic-directive expression-statement
4301 ordered-directive structured-block */
4304 c_parser_statement (c_parser *parser)
4306 while (c_parser_next_token_is_keyword (parser, RID_CASE)
4307 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
4308 || (c_parser_next_token_is (parser, CPP_NAME)
4309 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
4310 c_parser_label (parser);
4311 c_parser_statement_after_labels (parser);
4314 /* Parse a statement, other than a labeled statement. */
4317 c_parser_statement_after_labels (c_parser *parser)
4319 location_t loc = c_parser_peek_token (parser)->location;
4320 tree stmt = NULL_TREE;
4321 bool in_if_block = parser->in_if_block;
4322 parser->in_if_block = false;
4323 switch (c_parser_peek_token (parser)->type)
4325 case CPP_OPEN_BRACE:
4326 add_stmt (c_parser_compound_statement (parser));
4329 switch (c_parser_peek_token (parser)->keyword)
4332 c_parser_if_statement (parser);
4335 c_parser_switch_statement (parser);
4338 c_parser_while_statement (parser);
4341 c_parser_do_statement (parser);
4344 c_parser_for_statement (parser);
4347 c_parser_consume_token (parser);
4348 if (c_parser_next_token_is (parser, CPP_NAME))
4350 stmt = c_finish_goto_label (loc,
4351 c_parser_peek_token (parser)->value);
4352 c_parser_consume_token (parser);
4354 else if (c_parser_next_token_is (parser, CPP_MULT))
4358 c_parser_consume_token (parser);
4359 val = c_parser_expression (parser).value;
4360 mark_exp_read (val);
4361 stmt = c_finish_goto_ptr (loc, val);
4364 c_parser_error (parser, "expected identifier or %<*%>");
4365 goto expect_semicolon;
4367 c_parser_consume_token (parser);
4368 stmt = c_finish_bc_stmt (loc, &c_cont_label, false);
4369 goto expect_semicolon;
4371 c_parser_consume_token (parser);
4372 stmt = c_finish_bc_stmt (loc, &c_break_label, true);
4373 goto expect_semicolon;
4375 c_parser_consume_token (parser);
4376 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4378 stmt = c_finish_return (loc, NULL_TREE, NULL_TREE);
4379 c_parser_consume_token (parser);
4383 struct c_expr expr = c_parser_expression_conv (parser);
4384 mark_exp_read (expr.value);
4385 stmt = c_finish_return (loc, expr.value, expr.original_type);
4386 goto expect_semicolon;
4390 stmt = c_parser_asm_statement (parser);
4393 gcc_assert (c_dialect_objc ());
4394 c_parser_consume_token (parser);
4395 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4397 stmt = objc_build_throw_stmt (loc, NULL_TREE);
4398 c_parser_consume_token (parser);
4402 tree expr = c_parser_expression (parser).value;
4403 expr = c_fully_fold (expr, false, NULL);
4404 stmt = objc_build_throw_stmt (loc, expr);
4405 goto expect_semicolon;
4409 gcc_assert (c_dialect_objc ());
4410 c_parser_objc_try_catch_finally_statement (parser);
4412 case RID_AT_SYNCHRONIZED:
4413 gcc_assert (c_dialect_objc ());
4414 c_parser_objc_synchronized_statement (parser);
4421 c_parser_consume_token (parser);
4423 case CPP_CLOSE_PAREN:
4424 case CPP_CLOSE_SQUARE:
4425 /* Avoid infinite loop in error recovery:
4426 c_parser_skip_until_found stops at a closing nesting
4427 delimiter without consuming it, but here we need to consume
4428 it to proceed further. */
4429 c_parser_error (parser, "expected statement");
4430 c_parser_consume_token (parser);
4433 c_parser_pragma (parser, pragma_stmt);
4437 stmt = c_finish_expr_stmt (loc, c_parser_expression_conv (parser).value);
4439 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4442 /* Two cases cannot and do not have line numbers associated: If stmt
4443 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
4444 cannot hold line numbers. But that's OK because the statement
4445 will either be changed to a MODIFY_EXPR during gimplification of
4446 the statement expr, or discarded. If stmt was compound, but
4447 without new variables, we will have skipped the creation of a
4448 BIND and will have a bare STATEMENT_LIST. But that's OK because
4449 (recursively) all of the component statements should already have
4450 line numbers assigned. ??? Can we discard no-op statements
4452 if (CAN_HAVE_LOCATION_P (stmt)
4453 && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION)
4454 SET_EXPR_LOCATION (stmt, loc);
4456 parser->in_if_block = in_if_block;
4459 /* Parse the condition from an if, do, while or for statements. */
4462 c_parser_condition (c_parser *parser)
4464 location_t loc = c_parser_peek_token (parser)->location;
4466 cond = c_parser_expression_conv (parser).value;
4467 cond = c_objc_common_truthvalue_conversion (loc, cond);
4468 cond = c_fully_fold (cond, false, NULL);
4469 if (warn_sequence_point)
4470 verify_sequence_points (cond);
4474 /* Parse a parenthesized condition from an if, do or while statement.
4480 c_parser_paren_condition (c_parser *parser)
4483 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4484 return error_mark_node;
4485 cond = c_parser_condition (parser);
4486 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4490 /* Parse a statement which is a block in C99. */
4493 c_parser_c99_block_statement (c_parser *parser)
4495 tree block = c_begin_compound_stmt (flag_isoc99);
4496 location_t loc = c_parser_peek_token (parser)->location;
4497 c_parser_statement (parser);
4498 return c_end_compound_stmt (loc, block, flag_isoc99);
4501 /* Parse the body of an if statement. This is just parsing a
4502 statement but (a) it is a block in C99, (b) we track whether the
4503 body is an if statement for the sake of -Wparentheses warnings, (c)
4504 we handle an empty body specially for the sake of -Wempty-body
4505 warnings, and (d) we call parser_compound_statement directly
4506 because c_parser_statement_after_labels resets
4507 parser->in_if_block. */
4510 c_parser_if_body (c_parser *parser, bool *if_p)
4512 tree block = c_begin_compound_stmt (flag_isoc99);
4513 location_t body_loc = c_parser_peek_token (parser)->location;
4514 while (c_parser_next_token_is_keyword (parser, RID_CASE)
4515 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
4516 || (c_parser_next_token_is (parser, CPP_NAME)
4517 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
4518 c_parser_label (parser);
4519 *if_p = c_parser_next_token_is_keyword (parser, RID_IF);
4520 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4522 location_t loc = c_parser_peek_token (parser)->location;
4523 add_stmt (build_empty_stmt (loc));
4524 c_parser_consume_token (parser);
4525 if (!c_parser_next_token_is_keyword (parser, RID_ELSE))
4526 warning_at (loc, OPT_Wempty_body,
4527 "suggest braces around empty body in an %<if%> statement");
4529 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
4530 add_stmt (c_parser_compound_statement (parser));
4532 c_parser_statement_after_labels (parser);
4533 return c_end_compound_stmt (body_loc, block, flag_isoc99);
4536 /* Parse the else body of an if statement. This is just parsing a
4537 statement but (a) it is a block in C99, (b) we handle an empty body
4538 specially for the sake of -Wempty-body warnings. */
4541 c_parser_else_body (c_parser *parser)
4543 location_t else_loc = c_parser_peek_token (parser)->location;
4544 tree block = c_begin_compound_stmt (flag_isoc99);
4545 while (c_parser_next_token_is_keyword (parser, RID_CASE)
4546 || c_parser_next_token_is_keyword (parser, RID_DEFAULT)
4547 || (c_parser_next_token_is (parser, CPP_NAME)
4548 && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
4549 c_parser_label (parser);
4550 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4552 location_t loc = c_parser_peek_token (parser)->location;
4555 "suggest braces around empty body in an %<else%> statement");
4556 add_stmt (build_empty_stmt (loc));
4557 c_parser_consume_token (parser);
4560 c_parser_statement_after_labels (parser);
4561 return c_end_compound_stmt (else_loc, block, flag_isoc99);
4564 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
4567 if ( expression ) statement
4568 if ( expression ) statement else statement
4572 c_parser_if_statement (c_parser *parser)
4577 bool first_if = false;
4578 tree first_body, second_body;
4581 gcc_assert (c_parser_next_token_is_keyword (parser, RID_IF));
4582 c_parser_consume_token (parser);
4583 block = c_begin_compound_stmt (flag_isoc99);
4584 loc = c_parser_peek_token (parser)->location;
4585 cond = c_parser_paren_condition (parser);
4586 in_if_block = parser->in_if_block;
4587 parser->in_if_block = true;
4588 first_body = c_parser_if_body (parser, &first_if);
4589 parser->in_if_block = in_if_block;
4590 if (c_parser_next_token_is_keyword (parser, RID_ELSE))
4592 c_parser_consume_token (parser);
4593 second_body = c_parser_else_body (parser);
4596 second_body = NULL_TREE;
4597 c_finish_if_stmt (loc, cond, first_body, second_body, first_if);
4598 add_stmt (c_end_compound_stmt (loc, block, flag_isoc99));
4601 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
4604 switch (expression) statement
4608 c_parser_switch_statement (c_parser *parser)
4610 tree block, expr, body, save_break;
4611 location_t switch_loc = c_parser_peek_token (parser)->location;
4612 location_t switch_cond_loc;
4613 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SWITCH));
4614 c_parser_consume_token (parser);
4615 block = c_begin_compound_stmt (flag_isoc99);
4616 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4618 switch_cond_loc = c_parser_peek_token (parser)->location;
4619 expr = c_parser_expression (parser).value;
4620 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4624 switch_cond_loc = UNKNOWN_LOCATION;
4625 expr = error_mark_node;
4627 c_start_case (switch_loc, switch_cond_loc, expr);
4628 save_break = c_break_label;
4629 c_break_label = NULL_TREE;
4630 body = c_parser_c99_block_statement (parser);
4631 c_finish_case (body);
4634 location_t here = c_parser_peek_token (parser)->location;
4635 tree t = build1 (LABEL_EXPR, void_type_node, c_break_label);
4636 SET_EXPR_LOCATION (t, here);
4639 c_break_label = save_break;
4640 add_stmt (c_end_compound_stmt (switch_loc, block, flag_isoc99));
4643 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
4646 while (expression) statement
4650 c_parser_while_statement (c_parser *parser)
4652 tree block, cond, body, save_break, save_cont;
4654 gcc_assert (c_parser_next_token_is_keyword (parser, RID_WHILE));
4655 c_parser_consume_token (parser);
4656 block = c_begin_compound_stmt (flag_isoc99);
4657 loc = c_parser_peek_token (parser)->location;
4658 cond = c_parser_paren_condition (parser);
4659 save_break = c_break_label;
4660 c_break_label = NULL_TREE;
4661 save_cont = c_cont_label;
4662 c_cont_label = NULL_TREE;
4663 body = c_parser_c99_block_statement (parser);
4664 c_finish_loop (loc, cond, NULL, body, c_break_label, c_cont_label, true);
4665 add_stmt (c_end_compound_stmt (loc, block, flag_isoc99));
4666 c_break_label = save_break;
4667 c_cont_label = save_cont;
4670 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4673 do statement while ( expression ) ;
4677 c_parser_do_statement (c_parser *parser)
4679 tree block, cond, body, save_break, save_cont, new_break, new_cont;
4681 gcc_assert (c_parser_next_token_is_keyword (parser, RID_DO));
4682 c_parser_consume_token (parser);
4683 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4684 warning_at (c_parser_peek_token (parser)->location,
4686 "suggest braces around empty body in %<do%> statement");
4687 block = c_begin_compound_stmt (flag_isoc99);
4688 loc = c_parser_peek_token (parser)->location;
4689 save_break = c_break_label;
4690 c_break_label = NULL_TREE;
4691 save_cont = c_cont_label;
4692 c_cont_label = NULL_TREE;
4693 body = c_parser_c99_block_statement (parser);
4694 c_parser_require_keyword (parser, RID_WHILE, "expected %<while%>");
4695 new_break = c_break_label;
4696 c_break_label = save_break;
4697 new_cont = c_cont_label;
4698 c_cont_label = save_cont;
4699 cond = c_parser_paren_condition (parser);
4700 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
4701 c_parser_skip_to_end_of_block_or_statement (parser);
4702 c_finish_loop (loc, cond, NULL, body, new_break, new_cont, false);
4703 add_stmt (c_end_compound_stmt (loc, block, flag_isoc99));
4706 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4709 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4710 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4712 The form with a declaration is new in C99.
4714 ??? In accordance with the old parser, the declaration may be a
4715 nested function, which is then rejected in check_for_loop_decls,
4716 but does it make any sense for this to be included in the grammar?
4717 Note in particular that the nested function does not include a
4718 trailing ';', whereas the "declaration" production includes one.
4719 Also, can we reject bad declarations earlier and cheaper than
4720 check_for_loop_decls?
4722 In Objective-C, there are two additional variants:
4725 for ( expression in expresssion ) statement
4726 for ( declaration in expression ) statement
4728 This is inconsistent with C, because the second variant is allowed
4729 even if c99 is not enabled.
4731 The rest of the comment documents these Objective-C foreach-statement.
4733 Here is the canonical example of the first variant:
4734 for (object in array) { do something with object }
4735 we call the first expression ("object") the "object_expression" and
4736 the second expression ("array") the "collection_expression".
4737 object_expression must be an lvalue of type "id" (a generic Objective-C
4738 object) because the loop works by assigning to object_expression the
4739 various objects from the collection_expression. collection_expression
4740 must evaluate to something of type "id" which responds to the method
4741 countByEnumeratingWithState:objects:count:.
4743 The canonical example of the second variant is:
4744 for (id object in array) { do something with object }
4745 which is completely equivalent to
4748 for (object in array) { do something with object }
4750 Note that initizializing 'object' in some way (eg, "for ((object =
4751 xxx) in array) { do something with object }") is possibly
4752 technically valid, but completely pointless as 'object' will be
4753 assigned to something else as soon as the loop starts. We should
4754 most likely reject it (TODO).
4756 The beginning of the Objective-C foreach-statement looks exactly
4757 like the beginning of the for-statement, and we can tell it is a
4758 foreach-statement only because the initial declaration or
4759 expression is terminated by 'in' instead of ';'.
4763 c_parser_for_statement (c_parser *parser)
4765 tree block, cond, incr, save_break, save_cont, body;
4766 /* The following are only used when parsing an ObjC foreach statement. */
4767 tree object_expression;
4768 /* Silence the bogus uninitialized warning. */
4769 tree collection_expression = NULL;
4770 location_t loc = c_parser_peek_token (parser)->location;
4771 location_t for_loc = c_parser_peek_token (parser)->location;
4772 bool is_foreach_statement = false;
4773 gcc_assert (c_parser_next_token_is_keyword (parser, RID_FOR));
4774 c_parser_consume_token (parser);
4775 /* Open a compound statement in Objective-C as well, just in case this is
4776 as foreach expression. */
4777 block = c_begin_compound_stmt (flag_isoc99 || c_dialect_objc ());
4778 cond = error_mark_node;
4779 incr = error_mark_node;
4780 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4782 /* Parse the initialization declaration or expression. */
4783 object_expression = error_mark_node;
4784 parser->objc_could_be_foreach_context = c_dialect_objc ();
4785 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4787 parser->objc_could_be_foreach_context = false;
4788 c_parser_consume_token (parser);
4789 c_finish_expr_stmt (loc, NULL_TREE);
4791 else if (c_parser_next_tokens_start_declaration (parser))
4793 c_parser_declaration_or_fndef (parser, true, true, true, true, true,
4794 &object_expression);
4795 parser->objc_could_be_foreach_context = false;
4797 if (c_parser_next_token_is_keyword (parser, RID_IN))
4799 c_parser_consume_token (parser);
4800 is_foreach_statement = true;
4801 if (check_for_loop_decls (for_loc, true) == NULL_TREE)
4802 c_parser_error (parser, "multiple iterating variables in fast enumeration");
4805 check_for_loop_decls (for_loc, flag_isoc99);
4807 else if (c_parser_next_token_is_keyword (parser, RID_EXTENSION))
4809 /* __extension__ can start a declaration, but is also an
4810 unary operator that can start an expression. Consume all
4811 but the last of a possible series of __extension__ to
4813 while (c_parser_peek_2nd_token (parser)->type == CPP_KEYWORD
4814 && (c_parser_peek_2nd_token (parser)->keyword
4816 c_parser_consume_token (parser);
4817 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser)))
4820 ext = disable_extension_diagnostics ();
4821 c_parser_consume_token (parser);
4822 c_parser_declaration_or_fndef (parser, true, true, true, true,
4823 true, &object_expression);
4824 parser->objc_could_be_foreach_context = false;
4826 restore_extension_diagnostics (ext);
4827 if (c_parser_next_token_is_keyword (parser, RID_IN))
4829 c_parser_consume_token (parser);
4830 is_foreach_statement = true;
4831 if (check_for_loop_decls (for_loc, true) == NULL_TREE)
4832 c_parser_error (parser, "multiple iterating variables in fast enumeration");
4835 check_for_loop_decls (for_loc, flag_isoc99);
4844 tree init_expression;
4845 init_expression = c_parser_expression (parser).value;
4846 parser->objc_could_be_foreach_context = false;
4847 if (c_parser_next_token_is_keyword (parser, RID_IN))
4849 c_parser_consume_token (parser);
4850 is_foreach_statement = true;
4851 if (! lvalue_p (init_expression))
4852 c_parser_error (parser, "invalid iterating variable in fast enumeration");
4853 object_expression = c_fully_fold (init_expression, false, NULL);
4857 c_finish_expr_stmt (loc, init_expression);
4858 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4862 /* Parse the loop condition. In the case of a foreach
4863 statement, there is no loop condition. */
4864 gcc_assert (!parser->objc_could_be_foreach_context);
4865 if (!is_foreach_statement)
4867 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
4869 c_parser_consume_token (parser);
4874 cond = c_parser_condition (parser);
4875 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
4878 /* Parse the increment expression (the third expression in a
4879 for-statement). In the case of a foreach-statement, this is
4880 the expression that follows the 'in'. */
4881 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
4883 if (is_foreach_statement)
4885 c_parser_error (parser, "missing collection in fast enumeration");
4886 collection_expression = error_mark_node;
4889 incr = c_process_expr_stmt (loc, NULL_TREE);
4893 if (is_foreach_statement)
4894 collection_expression = c_fully_fold (c_parser_expression (parser).value,
4897 incr = c_process_expr_stmt (loc, c_parser_expression (parser).value);
4899 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
4901 save_break = c_break_label;
4902 c_break_label = NULL_TREE;
4903 save_cont = c_cont_label;
4904 c_cont_label = NULL_TREE;
4905 body = c_parser_c99_block_statement (parser);
4906 if (is_foreach_statement)
4907 objc_finish_foreach_loop (loc, object_expression, collection_expression, body, c_break_label, c_cont_label);
4909 c_finish_loop (loc, cond, incr, body, c_break_label, c_cont_label, true);
4910 add_stmt (c_end_compound_stmt (loc, block, flag_isoc99 || c_dialect_objc ()));
4911 c_break_label = save_break;
4912 c_cont_label = save_cont;
4915 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4916 statement with inputs, outputs, clobbers, and volatile tag
4920 asm type-qualifier[opt] ( asm-argument ) ;
4921 asm type-qualifier[opt] goto ( asm-goto-argument ) ;
4925 asm-string-literal : asm-operands[opt]
4926 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4927 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
4930 asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
4933 Qualifiers other than volatile are accepted in the syntax but
4937 c_parser_asm_statement (c_parser *parser)
4939 tree quals, str, outputs, inputs, clobbers, labels, ret;
4940 bool simple, is_goto;
4941 location_t asm_loc = c_parser_peek_token (parser)->location;
4942 int section, nsections;
4944 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
4945 c_parser_consume_token (parser);
4946 if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
4948 quals = c_parser_peek_token (parser)->value;
4949 c_parser_consume_token (parser);
4951 else if (c_parser_next_token_is_keyword (parser, RID_CONST)
4952 || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
4954 warning_at (c_parser_peek_token (parser)->location,
4956 "%E qualifier ignored on asm",
4957 c_parser_peek_token (parser)->value);
4959 c_parser_consume_token (parser);
4965 if (c_parser_next_token_is_keyword (parser, RID_GOTO))
4967 c_parser_consume_token (parser);
4971 /* ??? Follow the C++ parser rather than using the
4972 lex_untranslated_string kludge. */
4973 parser->lex_untranslated_string = true;
4976 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
4979 str = c_parser_asm_string_literal (parser);
4980 if (str == NULL_TREE)
4981 goto error_close_paren;
4984 outputs = NULL_TREE;
4986 clobbers = NULL_TREE;
4989 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto)
4992 /* Parse each colon-delimited section of operands. */
4993 nsections = 3 + is_goto;
4994 for (section = 0; section < nsections; ++section)
4996 if (!c_parser_require (parser, CPP_COLON,
4999 : "expected %<:%> or %<)%>"))
5000 goto error_close_paren;
5002 /* Once past any colon, we're no longer a simple asm. */
5005 if ((!c_parser_next_token_is (parser, CPP_COLON)
5006 && !c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
5011 /* For asm goto, we don't allow output operands, but reserve
5012 the slot for a future extension that does allow them. */
5014 outputs = c_parser_asm_operands (parser, false);
5017 inputs = c_parser_asm_operands (parser, true);
5020 clobbers = c_parser_asm_clobbers (parser);
5023 labels = c_parser_asm_goto_operands (parser);
5029 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN) && !is_goto)
5034 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
5036 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5040 if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
5041 c_parser_skip_to_end_of_block_or_statement (parser);
5043 ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs,
5044 clobbers, labels, simple));
5047 parser->lex_untranslated_string = false;
5051 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5055 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
5056 not outputs), apply the default conversion of functions and arrays
5061 asm-operands , asm-operand
5064 asm-string-literal ( expression )
5065 [ identifier ] asm-string-literal ( expression )
5069 c_parser_asm_operands (c_parser *parser, bool convert_p)
5071 tree list = NULL_TREE;
5077 if (c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
5079 c_parser_consume_token (parser);
5080 if (c_parser_next_token_is (parser, CPP_NAME))
5082 tree id = c_parser_peek_token (parser)->value;
5083 c_parser_consume_token (parser);
5084 name = build_string (IDENTIFIER_LENGTH (id),
5085 IDENTIFIER_POINTER (id));
5089 c_parser_error (parser, "expected identifier");
5090 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, NULL);
5093 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
5098 str = c_parser_asm_string_literal (parser);
5099 if (str == NULL_TREE)
5101 parser->lex_untranslated_string = false;
5102 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
5104 parser->lex_untranslated_string = true;
5107 loc = c_parser_peek_token (parser)->location;
5108 expr = c_parser_expression (parser);
5109 mark_exp_read (expr.value);
5111 expr = default_function_array_conversion (loc, expr);
5112 expr.value = c_fully_fold (expr.value, false, NULL);
5113 parser->lex_untranslated_string = true;
5114 if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
5116 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
5119 list = chainon (list, build_tree_list (build_tree_list (name, str),
5121 if (c_parser_next_token_is (parser, CPP_COMMA))
5122 c_parser_consume_token (parser);
5129 /* Parse asm clobbers, a GNU extension.
5133 asm-clobbers , asm-string-literal
5137 c_parser_asm_clobbers (c_parser *parser)
5139 tree list = NULL_TREE;
5142 tree str = c_parser_asm_string_literal (parser);
5144 list = tree_cons (NULL_TREE, str, list);
5147 if (c_parser_next_token_is (parser, CPP_COMMA))
5148 c_parser_consume_token (parser);
5155 /* Parse asm goto labels, a GNU extension.
5159 asm-goto-operands , identifier
5163 c_parser_asm_goto_operands (c_parser *parser)
5165 tree list = NULL_TREE;
5170 if (c_parser_next_token_is (parser, CPP_NAME))
5172 c_token *tok = c_parser_peek_token (parser);
5174 label = lookup_label_for_goto (tok->location, name);
5175 c_parser_consume_token (parser);
5176 TREE_USED (label) = 1;
5180 c_parser_error (parser, "expected identifier");
5184 name = build_string (IDENTIFIER_LENGTH (name),
5185 IDENTIFIER_POINTER (name));
5186 list = tree_cons (name, label, list);
5187 if (c_parser_next_token_is (parser, CPP_COMMA))
5188 c_parser_consume_token (parser);
5190 return nreverse (list);
5194 /* Parse an expression other than a compound expression; that is, an
5195 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
5196 NULL then it is an Objective-C message expression which is the
5197 primary-expression starting the expression as an initializer.
5199 assignment-expression:
5200 conditional-expression
5201 unary-expression assignment-operator assignment-expression
5203 assignment-operator: one of
5204 = *= /= %= += -= <<= >>= &= ^= |=
5206 In GNU C we accept any conditional expression on the LHS and
5207 diagnose the invalid lvalue rather than producing a syntax
5210 static struct c_expr
5211 c_parser_expr_no_commas (c_parser *parser, struct c_expr *after)
5213 struct c_expr lhs, rhs, ret;
5214 enum tree_code code;
5215 location_t op_location, exp_location;
5216 gcc_assert (!after || c_dialect_objc ());
5217 lhs = c_parser_conditional_expression (parser, after);
5218 op_location = c_parser_peek_token (parser)->location;
5219 switch (c_parser_peek_token (parser)->type)
5228 code = TRUNC_DIV_EXPR;
5231 code = TRUNC_MOD_EXPR;
5246 code = BIT_AND_EXPR;
5249 code = BIT_XOR_EXPR;
5252 code = BIT_IOR_EXPR;
5257 c_parser_consume_token (parser);
5258 exp_location = c_parser_peek_token (parser)->location;
5259 rhs = c_parser_expr_no_commas (parser, NULL);
5260 rhs = default_function_array_read_conversion (exp_location, rhs);
5261 ret.value = build_modify_expr (op_location, lhs.value, lhs.original_type,
5262 code, exp_location, rhs.value,
5264 if (code == NOP_EXPR)
5265 ret.original_code = MODIFY_EXPR;
5268 TREE_NO_WARNING (ret.value) = 1;
5269 ret.original_code = ERROR_MARK;
5271 ret.original_type = NULL;
5275 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
5276 is not NULL then it is an Objective-C message expression which is
5277 the primary-expression starting the expression as an initializer.
5279 conditional-expression:
5280 logical-OR-expression
5281 logical-OR-expression ? expression : conditional-expression
5285 conditional-expression:
5286 logical-OR-expression ? : conditional-expression
5289 static struct c_expr
5290 c_parser_conditional_expression (c_parser *parser, struct c_expr *after)
5292 struct c_expr cond, exp1, exp2, ret;
5293 location_t cond_loc, colon_loc, middle_loc;
5295 gcc_assert (!after || c_dialect_objc ());
5297 cond = c_parser_binary_expression (parser, after);
5299 if (c_parser_next_token_is_not (parser, CPP_QUERY))
5301 cond_loc = c_parser_peek_token (parser)->location;
5302 cond = default_function_array_read_conversion (cond_loc, cond);
5303 c_parser_consume_token (parser);
5304 if (c_parser_next_token_is (parser, CPP_COLON))
5306 tree eptype = NULL_TREE;
5308 middle_loc = c_parser_peek_token (parser)->location;
5309 pedwarn (middle_loc, OPT_pedantic,
5310 "ISO C forbids omitting the middle term of a ?: expression");
5311 warn_for_omitted_condop (middle_loc, cond.value);
5312 if (TREE_CODE (cond.value) == EXCESS_PRECISION_EXPR)
5314 eptype = TREE_TYPE (cond.value);
5315 cond.value = TREE_OPERAND (cond.value, 0);
5317 /* Make sure first operand is calculated only once. */
5318 exp1.value = c_save_expr (default_conversion (cond.value));
5320 exp1.value = build1 (EXCESS_PRECISION_EXPR, eptype, exp1.value);
5321 exp1.original_type = NULL;
5322 cond.value = c_objc_common_truthvalue_conversion (cond_loc, exp1.value);
5323 c_inhibit_evaluation_warnings += cond.value == truthvalue_true_node;
5328 = c_objc_common_truthvalue_conversion
5329 (cond_loc, default_conversion (cond.value));
5330 c_inhibit_evaluation_warnings += cond.value == truthvalue_false_node;
5331 exp1 = c_parser_expression_conv (parser);
5332 mark_exp_read (exp1.value);
5333 c_inhibit_evaluation_warnings +=
5334 ((cond.value == truthvalue_true_node)
5335 - (cond.value == truthvalue_false_node));
5338 colon_loc = c_parser_peek_token (parser)->location;
5339 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
5341 c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node;
5342 ret.value = error_mark_node;
5343 ret.original_code = ERROR_MARK;
5344 ret.original_type = NULL;
5348 location_t exp2_loc = c_parser_peek_token (parser)->location;
5349 exp2 = c_parser_conditional_expression (parser, NULL);
5350 exp2 = default_function_array_read_conversion (exp2_loc, exp2);
5352 c_inhibit_evaluation_warnings -= cond.value == truthvalue_true_node;
5353 ret.value = build_conditional_expr (colon_loc, cond.value,
5354 cond.original_code == C_MAYBE_CONST_EXPR,
5355 exp1.value, exp1.original_type,
5356 exp2.value, exp2.original_type);
5357 ret.original_code = ERROR_MARK;
5358 if (exp1.value == error_mark_node || exp2.value == error_mark_node)
5359 ret.original_type = NULL;
5364 /* If both sides are enum type, the default conversion will have
5365 made the type of the result be an integer type. We want to
5366 remember the enum types we started with. */
5367 t1 = exp1.original_type ? exp1.original_type : TREE_TYPE (exp1.value);
5368 t2 = exp2.original_type ? exp2.original_type : TREE_TYPE (exp2.value);
5369 ret.original_type = ((t1 != error_mark_node
5370 && t2 != error_mark_node
5371 && (TYPE_MAIN_VARIANT (t1)
5372 == TYPE_MAIN_VARIANT (t2)))
5379 /* Parse a binary expression; that is, a logical-OR-expression (C90
5380 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
5381 an Objective-C message expression which is the primary-expression
5382 starting the expression as an initializer.
5384 multiplicative-expression:
5386 multiplicative-expression * cast-expression
5387 multiplicative-expression / cast-expression
5388 multiplicative-expression % cast-expression
5390 additive-expression:
5391 multiplicative-expression
5392 additive-expression + multiplicative-expression
5393 additive-expression - multiplicative-expression
5397 shift-expression << additive-expression
5398 shift-expression >> additive-expression
5400 relational-expression:
5402 relational-expression < shift-expression
5403 relational-expression > shift-expression
5404 relational-expression <= shift-expression
5405 relational-expression >= shift-expression
5407 equality-expression:
5408 relational-expression
5409 equality-expression == relational-expression
5410 equality-expression != relational-expression
5414 AND-expression & equality-expression
5416 exclusive-OR-expression:
5418 exclusive-OR-expression ^ AND-expression
5420 inclusive-OR-expression:
5421 exclusive-OR-expression
5422 inclusive-OR-expression | exclusive-OR-expression
5424 logical-AND-expression:
5425 inclusive-OR-expression
5426 logical-AND-expression && inclusive-OR-expression
5428 logical-OR-expression:
5429 logical-AND-expression
5430 logical-OR-expression || logical-AND-expression
5433 static struct c_expr
5434 c_parser_binary_expression (c_parser *parser, struct c_expr *after)
5436 /* A binary expression is parsed using operator-precedence parsing,
5437 with the operands being cast expressions. All the binary
5438 operators are left-associative. Thus a binary expression is of
5441 E0 op1 E1 op2 E2 ...
5443 which we represent on a stack. On the stack, the precedence
5444 levels are strictly increasing. When a new operator is
5445 encountered of higher precedence than that at the top of the
5446 stack, it is pushed; its LHS is the top expression, and its RHS
5447 is everything parsed until it is popped. When a new operator is
5448 encountered with precedence less than or equal to that at the top
5449 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
5450 by the result of the operation until the operator at the top of
5451 the stack has lower precedence than the new operator or there is
5452 only one element on the stack; then the top expression is the LHS
5453 of the new operator. In the case of logical AND and OR
5454 expressions, we also need to adjust c_inhibit_evaluation_warnings
5455 as appropriate when the operators are pushed and popped. */
5457 /* The precedence levels, where 0 is a dummy lowest level used for
5458 the bottom of the stack. */
5474 /* The expression at this stack level. */
5476 /* The precedence of the operator on its left, PREC_NONE at the
5477 bottom of the stack. */
5479 /* The operation on its left. */
5481 /* The source location of this operation. */
5485 /* Location of the binary operator. */
5486 location_t binary_loc = UNKNOWN_LOCATION; /* Quiet warning. */
5489 switch (stack[sp].op) \
5491 case TRUTH_ANDIF_EXPR: \
5492 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5493 == truthvalue_false_node); \
5495 case TRUTH_ORIF_EXPR: \
5496 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5497 == truthvalue_true_node); \
5502 stack[sp - 1].expr \
5503 = default_function_array_read_conversion (stack[sp - 1].loc, \
5504 stack[sp - 1].expr); \
5506 = default_function_array_read_conversion (stack[sp].loc, \
5508 stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \
5510 stack[sp - 1].expr, \
5514 gcc_assert (!after || c_dialect_objc ());
5515 stack[0].loc = c_parser_peek_token (parser)->location;
5516 stack[0].expr = c_parser_cast_expression (parser, after);
5517 stack[0].prec = PREC_NONE;
5522 enum tree_code ocode;
5525 switch (c_parser_peek_token (parser)->type)
5533 ocode = TRUNC_DIV_EXPR;
5537 ocode = TRUNC_MOD_EXPR;
5549 ocode = LSHIFT_EXPR;
5553 ocode = RSHIFT_EXPR;
5567 case CPP_GREATER_EQ:
5580 oprec = PREC_BITAND;
5581 ocode = BIT_AND_EXPR;
5584 oprec = PREC_BITXOR;
5585 ocode = BIT_XOR_EXPR;
5589 ocode = BIT_IOR_EXPR;
5592 oprec = PREC_LOGAND;
5593 ocode = TRUTH_ANDIF_EXPR;
5597 ocode = TRUTH_ORIF_EXPR;
5600 /* Not a binary operator, so end of the binary
5604 binary_loc = c_parser_peek_token (parser)->location;
5605 c_parser_consume_token (parser);
5606 while (oprec <= stack[sp].prec)
5610 case TRUTH_ANDIF_EXPR:
5612 = default_function_array_read_conversion (stack[sp].loc,
5614 stack[sp].expr.value = c_objc_common_truthvalue_conversion
5615 (stack[sp].loc, default_conversion (stack[sp].expr.value));
5616 c_inhibit_evaluation_warnings += (stack[sp].expr.value
5617 == truthvalue_false_node);
5619 case TRUTH_ORIF_EXPR:
5621 = default_function_array_read_conversion (stack[sp].loc,
5623 stack[sp].expr.value = c_objc_common_truthvalue_conversion
5624 (stack[sp].loc, default_conversion (stack[sp].expr.value));
5625 c_inhibit_evaluation_warnings += (stack[sp].expr.value
5626 == truthvalue_true_node);
5632 stack[sp].loc = binary_loc;
5633 stack[sp].expr = c_parser_cast_expression (parser, NULL);
5634 stack[sp].prec = oprec;
5635 stack[sp].op = ocode;
5636 stack[sp].loc = binary_loc;
5641 return stack[0].expr;
5645 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
5646 NULL then it is an Objective-C message expression which is the
5647 primary-expression starting the expression as an initializer.
5651 ( type-name ) unary-expression
5654 static struct c_expr
5655 c_parser_cast_expression (c_parser *parser, struct c_expr *after)
5657 location_t cast_loc = c_parser_peek_token (parser)->location;
5658 gcc_assert (!after || c_dialect_objc ());
5660 return c_parser_postfix_expression_after_primary (parser,
5662 /* If the expression begins with a parenthesized type name, it may
5663 be either a cast or a compound literal; we need to see whether
5664 the next character is '{' to tell the difference. If not, it is
5665 an unary expression. Full detection of unknown typenames here
5666 would require a 3-token lookahead. */
5667 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
5668 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5670 struct c_type_name *type_name;
5673 c_parser_consume_token (parser);
5674 type_name = c_parser_type_name (parser);
5675 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5676 if (type_name == NULL)
5678 ret.value = error_mark_node;
5679 ret.original_code = ERROR_MARK;
5680 ret.original_type = NULL;
5684 /* Save casted types in the function's used types hash table. */
5685 used_types_insert (type_name->specs->type);
5687 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5688 return c_parser_postfix_expression_after_paren_type (parser, type_name,
5691 location_t expr_loc = c_parser_peek_token (parser)->location;
5692 expr = c_parser_cast_expression (parser, NULL);
5693 expr = default_function_array_read_conversion (expr_loc, expr);
5695 ret.value = c_cast_expr (cast_loc, type_name, expr.value);
5696 ret.original_code = ERROR_MARK;
5697 ret.original_type = NULL;
5701 return c_parser_unary_expression (parser);
5704 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
5710 unary-operator cast-expression
5711 sizeof unary-expression
5712 sizeof ( type-name )
5714 unary-operator: one of
5720 __alignof__ unary-expression
5721 __alignof__ ( type-name )
5724 unary-operator: one of
5725 __extension__ __real__ __imag__
5727 In addition, the GNU syntax treats ++ and -- as unary operators, so
5728 they may be applied to cast expressions with errors for non-lvalues
5731 static struct c_expr
5732 c_parser_unary_expression (c_parser *parser)
5735 struct c_expr ret, op;
5736 location_t op_loc = c_parser_peek_token (parser)->location;
5738 ret.original_code = ERROR_MARK;
5739 ret.original_type = NULL;
5740 switch (c_parser_peek_token (parser)->type)
5743 c_parser_consume_token (parser);
5744 exp_loc = c_parser_peek_token (parser)->location;
5745 op = c_parser_cast_expression (parser, NULL);
5746 op = default_function_array_read_conversion (exp_loc, op);
5747 return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op);
5748 case CPP_MINUS_MINUS:
5749 c_parser_consume_token (parser);
5750 exp_loc = c_parser_peek_token (parser)->location;
5751 op = c_parser_cast_expression (parser, NULL);
5752 op = default_function_array_read_conversion (exp_loc, op);
5753 return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op);
5755 c_parser_consume_token (parser);
5756 op = c_parser_cast_expression (parser, NULL);
5757 mark_exp_read (op.value);
5758 return parser_build_unary_op (op_loc, ADDR_EXPR, op);
5760 c_parser_consume_token (parser);
5761 exp_loc = c_parser_peek_token (parser)->location;
5762 op = c_parser_cast_expression (parser, NULL);
5763 op = default_function_array_read_conversion (exp_loc, op);
5764 ret.value = build_indirect_ref (op_loc, op.value, RO_UNARY_STAR);
5767 if (!c_dialect_objc () && !in_system_header)
5770 "traditional C rejects the unary plus operator");
5771 c_parser_consume_token (parser);
5772 exp_loc = c_parser_peek_token (parser)->location;
5773 op = c_parser_cast_expression (parser, NULL);
5774 op = default_function_array_read_conversion (exp_loc, op);
5775 return parser_build_unary_op (op_loc, CONVERT_EXPR, op);
5777 c_parser_consume_token (parser);
5778 exp_loc = c_parser_peek_token (parser)->location;
5779 op = c_parser_cast_expression (parser, NULL);
5780 op = default_function_array_read_conversion (exp_loc, op);
5781 return parser_build_unary_op (op_loc, NEGATE_EXPR, op);
5783 c_parser_consume_token (parser);
5784 exp_loc = c_parser_peek_token (parser)->location;
5785 op = c_parser_cast_expression (parser, NULL);
5786 op = default_function_array_read_conversion (exp_loc, op);
5787 return parser_build_unary_op (op_loc, BIT_NOT_EXPR, op);
5789 c_parser_consume_token (parser);
5790 exp_loc = c_parser_peek_token (parser)->location;
5791 op = c_parser_cast_expression (parser, NULL);
5792 op = default_function_array_read_conversion (exp_loc, op);
5793 return parser_build_unary_op (op_loc, TRUTH_NOT_EXPR, op);
5795 /* Refer to the address of a label as a pointer. */
5796 c_parser_consume_token (parser);
5797 if (c_parser_next_token_is (parser, CPP_NAME))
5799 ret.value = finish_label_address_expr
5800 (c_parser_peek_token (parser)->value, op_loc);
5801 c_parser_consume_token (parser);
5805 c_parser_error (parser, "expected identifier");
5806 ret.value = error_mark_node;
5810 switch (c_parser_peek_token (parser)->keyword)
5813 return c_parser_sizeof_expression (parser);
5815 return c_parser_alignof_expression (parser);
5817 c_parser_consume_token (parser);
5818 ext = disable_extension_diagnostics ();
5819 ret = c_parser_cast_expression (parser, NULL);
5820 restore_extension_diagnostics (ext);
5823 c_parser_consume_token (parser);
5824 exp_loc = c_parser_peek_token (parser)->location;
5825 op = c_parser_cast_expression (parser, NULL);
5826 op = default_function_array_conversion (exp_loc, op);
5827 return parser_build_unary_op (op_loc, REALPART_EXPR, op);
5829 c_parser_consume_token (parser);
5830 exp_loc = c_parser_peek_token (parser)->location;
5831 op = c_parser_cast_expression (parser, NULL);
5832 op = default_function_array_conversion (exp_loc, op);
5833 return parser_build_unary_op (op_loc, IMAGPART_EXPR, op);
5835 return c_parser_postfix_expression (parser);
5838 return c_parser_postfix_expression (parser);
5842 /* Parse a sizeof expression. */
5844 static struct c_expr
5845 c_parser_sizeof_expression (c_parser *parser)
5848 location_t expr_loc;
5849 gcc_assert (c_parser_next_token_is_keyword (parser, RID_SIZEOF));
5850 c_parser_consume_token (parser);
5851 c_inhibit_evaluation_warnings++;
5853 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
5854 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5856 /* Either sizeof ( type-name ) or sizeof unary-expression
5857 starting with a compound literal. */
5858 struct c_type_name *type_name;
5859 c_parser_consume_token (parser);
5860 expr_loc = c_parser_peek_token (parser)->location;
5861 type_name = c_parser_type_name (parser);
5862 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5863 if (type_name == NULL)
5866 c_inhibit_evaluation_warnings--;
5868 ret.value = error_mark_node;
5869 ret.original_code = ERROR_MARK;
5870 ret.original_type = NULL;
5873 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5875 expr = c_parser_postfix_expression_after_paren_type (parser,
5880 /* sizeof ( type-name ). */
5881 c_inhibit_evaluation_warnings--;
5883 return c_expr_sizeof_type (expr_loc, type_name);
5887 expr_loc = c_parser_peek_token (parser)->location;
5888 expr = c_parser_unary_expression (parser);
5890 c_inhibit_evaluation_warnings--;
5892 mark_exp_read (expr.value);
5893 if (TREE_CODE (expr.value) == COMPONENT_REF
5894 && DECL_C_BIT_FIELD (TREE_OPERAND (expr.value, 1)))
5895 error_at (expr_loc, "%<sizeof%> applied to a bit-field");
5896 return c_expr_sizeof_expr (expr_loc, expr);
5900 /* Parse an alignof expression. */
5902 static struct c_expr
5903 c_parser_alignof_expression (c_parser *parser)
5906 location_t loc = c_parser_peek_token (parser)->location;
5907 gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
5908 c_parser_consume_token (parser);
5909 c_inhibit_evaluation_warnings++;
5911 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
5912 && c_token_starts_typename (c_parser_peek_2nd_token (parser)))
5914 /* Either __alignof__ ( type-name ) or __alignof__
5915 unary-expression starting with a compound literal. */
5917 struct c_type_name *type_name;
5919 c_parser_consume_token (parser);
5920 loc = c_parser_peek_token (parser)->location;
5921 type_name = c_parser_type_name (parser);
5922 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
5923 if (type_name == NULL)
5926 c_inhibit_evaluation_warnings--;
5928 ret.value = error_mark_node;
5929 ret.original_code = ERROR_MARK;
5930 ret.original_type = NULL;
5933 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
5935 expr = c_parser_postfix_expression_after_paren_type (parser,
5940 /* alignof ( type-name ). */
5941 c_inhibit_evaluation_warnings--;
5943 ret.value = c_alignof (loc, groktypename (type_name, NULL, NULL));
5944 ret.original_code = ERROR_MARK;
5945 ret.original_type = NULL;
5951 expr = c_parser_unary_expression (parser);
5953 mark_exp_read (expr.value);
5954 c_inhibit_evaluation_warnings--;
5956 ret.value = c_alignof_expr (loc, expr.value);
5957 ret.original_code = ERROR_MARK;
5958 ret.original_type = NULL;
5963 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5967 postfix-expression [ expression ]
5968 postfix-expression ( argument-expression-list[opt] )
5969 postfix-expression . identifier
5970 postfix-expression -> identifier
5971 postfix-expression ++
5972 postfix-expression --
5973 ( type-name ) { initializer-list }
5974 ( type-name ) { initializer-list , }
5976 argument-expression-list:
5978 argument-expression-list , argument-expression
5990 (treated as a keyword in GNU C)
5993 ( compound-statement )
5994 __builtin_va_arg ( assignment-expression , type-name )
5995 __builtin_offsetof ( type-name , offsetof-member-designator )
5996 __builtin_choose_expr ( assignment-expression ,
5997 assignment-expression ,
5998 assignment-expression )
5999 __builtin_types_compatible_p ( type-name , type-name )
6001 offsetof-member-designator:
6003 offsetof-member-designator . identifier
6004 offsetof-member-designator [ expression ]
6009 [ objc-receiver objc-message-args ]
6010 @selector ( objc-selector-arg )
6011 @protocol ( identifier )
6012 @encode ( type-name )
6014 Classname . identifier
6017 static struct c_expr
6018 c_parser_postfix_expression (c_parser *parser)
6020 struct c_expr expr, e1, e2, e3;
6021 struct c_type_name *t1, *t2;
6022 location_t loc = c_parser_peek_token (parser)->location;;
6023 expr.original_code = ERROR_MARK;
6024 expr.original_type = NULL;
6025 switch (c_parser_peek_token (parser)->type)
6028 expr.value = c_parser_peek_token (parser)->value;
6029 loc = c_parser_peek_token (parser)->location;
6030 c_parser_consume_token (parser);
6031 if (TREE_CODE (expr.value) == FIXED_CST
6032 && !targetm.fixed_point_supported_p ())
6034 error_at (loc, "fixed-point types not supported for this target");
6035 expr.value = error_mark_node;
6042 expr.value = c_parser_peek_token (parser)->value;
6043 c_parser_consume_token (parser);
6049 case CPP_UTF8STRING:
6050 expr.value = c_parser_peek_token (parser)->value;
6051 expr.original_code = STRING_CST;
6052 c_parser_consume_token (parser);
6054 case CPP_OBJC_STRING:
6055 gcc_assert (c_dialect_objc ());
6057 = objc_build_string_object (c_parser_peek_token (parser)->value);
6058 c_parser_consume_token (parser);
6061 switch (c_parser_peek_token (parser)->id_kind)
6065 tree id = c_parser_peek_token (parser)->value;
6066 c_parser_consume_token (parser);
6067 expr.value = build_external_ref (loc, id,
6068 (c_parser_peek_token (parser)->type
6070 &expr.original_type);
6073 case C_ID_CLASSNAME:
6075 /* Here we parse the Objective-C 2.0 Class.name dot
6077 tree class_name = c_parser_peek_token (parser)->value;
6079 c_parser_consume_token (parser);
6080 gcc_assert (c_dialect_objc ());
6081 if (!c_parser_require (parser, CPP_DOT, "expected %<.%>"))
6083 expr.value = error_mark_node;
6086 if (c_parser_next_token_is_not (parser, CPP_NAME))
6088 c_parser_error (parser, "expected identifier");
6089 expr.value = error_mark_node;
6092 component = c_parser_peek_token (parser)->value;
6093 c_parser_consume_token (parser);
6094 expr.value = objc_build_class_component_ref (class_name,
6099 c_parser_error (parser, "expected expression");
6100 expr.value = error_mark_node;
6104 case CPP_OPEN_PAREN:
6105 /* A parenthesized expression, statement expression or compound
6107 if (c_parser_peek_2nd_token (parser)->type == CPP_OPEN_BRACE)
6109 /* A statement expression. */
6111 location_t brace_loc;
6112 c_parser_consume_token (parser);
6113 brace_loc = c_parser_peek_token (parser)->location;
6114 c_parser_consume_token (parser);
6115 if (cur_stmt_list == NULL)
6117 error_at (loc, "braced-group within expression allowed "
6118 "only inside a function");
6119 parser->error = true;
6120 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
6121 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6122 expr.value = error_mark_node;
6125 stmt = c_begin_stmt_expr ();
6126 c_parser_compound_statement_nostart (parser);
6127 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6129 pedwarn (loc, OPT_pedantic,
6130 "ISO C forbids braced-groups within expressions");
6131 expr.value = c_finish_stmt_expr (brace_loc, stmt);
6132 mark_exp_read (expr.value);
6134 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser)))
6136 /* A compound literal. ??? Can we actually get here rather
6137 than going directly to
6138 c_parser_postfix_expression_after_paren_type from
6141 struct c_type_name *type_name;
6142 c_parser_consume_token (parser);
6143 loc = c_parser_peek_token (parser)->location;
6144 type_name = c_parser_type_name (parser);
6145 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6147 if (type_name == NULL)
6149 expr.value = error_mark_node;
6152 expr = c_parser_postfix_expression_after_paren_type (parser,
6158 /* A parenthesized expression. */
6159 c_parser_consume_token (parser);
6160 expr = c_parser_expression (parser);
6161 if (TREE_CODE (expr.value) == MODIFY_EXPR)
6162 TREE_NO_WARNING (expr.value) = 1;
6163 if (expr.original_code != C_MAYBE_CONST_EXPR)
6164 expr.original_code = ERROR_MARK;
6165 /* Don't change EXPR.ORIGINAL_TYPE. */
6166 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6171 switch (c_parser_peek_token (parser)->keyword)
6173 case RID_FUNCTION_NAME:
6174 case RID_PRETTY_FUNCTION_NAME:
6175 case RID_C99_FUNCTION_NAME:
6176 expr.value = fname_decl (loc,
6177 c_parser_peek_token (parser)->keyword,
6178 c_parser_peek_token (parser)->value);
6179 c_parser_consume_token (parser);
6182 c_parser_consume_token (parser);
6183 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6185 expr.value = error_mark_node;
6188 e1 = c_parser_expr_no_commas (parser, NULL);
6189 mark_exp_read (e1.value);
6190 e1.value = c_fully_fold (e1.value, false, NULL);
6191 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
6193 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6194 expr.value = error_mark_node;
6197 loc = c_parser_peek_token (parser)->location;
6198 t1 = c_parser_type_name (parser);
6199 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6203 expr.value = error_mark_node;
6207 tree type_expr = NULL_TREE;
6208 expr.value = c_build_va_arg (loc, e1.value,
6209 groktypename (t1, &type_expr, NULL));
6212 expr.value = build2 (C_MAYBE_CONST_EXPR,
6213 TREE_TYPE (expr.value), type_expr,
6215 C_MAYBE_CONST_EXPR_NON_CONST (expr.value) = true;
6220 c_parser_consume_token (parser);
6221 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6223 expr.value = error_mark_node;
6226 t1 = c_parser_type_name (parser);
6228 parser->error = true;
6229 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
6230 gcc_assert (parser->error);
6233 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6234 expr.value = error_mark_node;
6239 tree type = groktypename (t1, NULL, NULL);
6241 if (type == error_mark_node)
6242 offsetof_ref = error_mark_node;
6245 offsetof_ref = build1 (INDIRECT_REF, type, null_pointer_node);
6246 SET_EXPR_LOCATION (offsetof_ref, loc);
6248 /* Parse the second argument to __builtin_offsetof. We
6249 must have one identifier, and beyond that we want to
6250 accept sub structure and sub array references. */
6251 if (c_parser_next_token_is (parser, CPP_NAME))
6253 offsetof_ref = build_component_ref
6254 (loc, offsetof_ref, c_parser_peek_token (parser)->value);
6255 c_parser_consume_token (parser);
6256 while (c_parser_next_token_is (parser, CPP_DOT)
6257 || c_parser_next_token_is (parser,
6259 || c_parser_next_token_is (parser,
6262 if (c_parser_next_token_is (parser, CPP_DEREF))
6264 loc = c_parser_peek_token (parser)->location;
6265 offsetof_ref = build_array_ref (loc,
6270 else if (c_parser_next_token_is (parser, CPP_DOT))
6273 c_parser_consume_token (parser);
6274 if (c_parser_next_token_is_not (parser,
6277 c_parser_error (parser, "expected identifier");
6280 offsetof_ref = build_component_ref
6282 c_parser_peek_token (parser)->value);
6283 c_parser_consume_token (parser);
6288 loc = c_parser_peek_token (parser)->location;
6289 c_parser_consume_token (parser);
6290 idx = c_parser_expression (parser).value;
6291 idx = c_fully_fold (idx, false, NULL);
6292 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
6294 offsetof_ref = build_array_ref (loc, offsetof_ref, idx);
6299 c_parser_error (parser, "expected identifier");
6300 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6302 expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
6305 case RID_CHOOSE_EXPR:
6306 c_parser_consume_token (parser);
6307 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6309 expr.value = error_mark_node;
6312 loc = c_parser_peek_token (parser)->location;
6313 e1 = c_parser_expr_no_commas (parser, NULL);
6314 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
6316 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6317 expr.value = error_mark_node;
6320 e2 = c_parser_expr_no_commas (parser, NULL);
6321 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
6323 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6324 expr.value = error_mark_node;
6327 e3 = c_parser_expr_no_commas (parser, NULL);
6328 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6334 mark_exp_read (e2.value);
6335 mark_exp_read (e3.value);
6336 if (TREE_CODE (c) != INTEGER_CST
6337 || !INTEGRAL_TYPE_P (TREE_TYPE (c)))
6339 "first argument to %<__builtin_choose_expr%> not"
6341 constant_expression_warning (c);
6342 expr = integer_zerop (c) ? e3 : e2;
6345 case RID_TYPES_COMPATIBLE_P:
6346 c_parser_consume_token (parser);
6347 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6349 expr.value = error_mark_node;
6352 t1 = c_parser_type_name (parser);
6355 expr.value = error_mark_node;
6358 if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
6360 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6361 expr.value = error_mark_node;
6364 t2 = c_parser_type_name (parser);
6367 expr.value = error_mark_node;
6370 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6375 e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL));
6376 e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL));
6379 = comptypes (e1, e2) ? integer_one_node : integer_zero_node;
6382 case RID_AT_SELECTOR:
6383 gcc_assert (c_dialect_objc ());
6384 c_parser_consume_token (parser);
6385 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6387 expr.value = error_mark_node;
6391 tree sel = c_parser_objc_selector_arg (parser);
6392 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6394 expr.value = objc_build_selector_expr (loc, sel);
6397 case RID_AT_PROTOCOL:
6398 gcc_assert (c_dialect_objc ());
6399 c_parser_consume_token (parser);
6400 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6402 expr.value = error_mark_node;
6405 if (c_parser_next_token_is_not (parser, CPP_NAME))
6407 c_parser_error (parser, "expected identifier");
6408 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6409 expr.value = error_mark_node;
6413 tree id = c_parser_peek_token (parser)->value;
6414 c_parser_consume_token (parser);
6415 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6417 expr.value = objc_build_protocol_expr (id);
6421 /* Extension to support C-structures in the archiver. */
6422 gcc_assert (c_dialect_objc ());
6423 c_parser_consume_token (parser);
6424 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
6426 expr.value = error_mark_node;
6429 t1 = c_parser_type_name (parser);
6432 expr.value = error_mark_node;
6433 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6436 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6439 tree type = groktypename (t1, NULL, NULL);
6440 expr.value = objc_build_encode_expr (type);
6444 c_parser_error (parser, "expected expression");
6445 expr.value = error_mark_node;
6449 case CPP_OPEN_SQUARE:
6450 if (c_dialect_objc ())
6452 tree receiver, args;
6453 c_parser_consume_token (parser);
6454 receiver = c_parser_objc_receiver (parser);
6455 args = c_parser_objc_message_args (parser);
6456 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
6458 expr.value = objc_build_message_expr (receiver, args);
6461 /* Else fall through to report error. */
6463 c_parser_error (parser, "expected expression");
6464 expr.value = error_mark_node;
6467 return c_parser_postfix_expression_after_primary (parser, loc, expr);
6470 /* Parse a postfix expression after a parenthesized type name: the
6471 brace-enclosed initializer of a compound literal, possibly followed
6472 by some postfix operators. This is separate because it is not
6473 possible to tell until after the type name whether a cast
6474 expression has a cast or a compound literal, or whether the operand
6475 of sizeof is a parenthesized type name or starts with a compound
6476 literal. TYPE_LOC is the location where TYPE_NAME starts--the
6477 location of the first token after the parentheses around the type
6480 static struct c_expr
6481 c_parser_postfix_expression_after_paren_type (c_parser *parser,
6482 struct c_type_name *type_name,
6483 location_t type_loc)
6489 location_t start_loc;
6490 tree type_expr = NULL_TREE;
6491 bool type_expr_const = true;
6492 check_compound_literal_type (type_loc, type_name);
6493 start_init (NULL_TREE, NULL, 0);
6494 type = groktypename (type_name, &type_expr, &type_expr_const);
6495 start_loc = c_parser_peek_token (parser)->location;
6496 if (type != error_mark_node && C_TYPE_VARIABLE_SIZE (type))
6498 error_at (type_loc, "compound literal has variable size");
6499 type = error_mark_node;
6501 init = c_parser_braced_init (parser, type, false);
6503 maybe_warn_string_init (type, init);
6505 if (type != error_mark_node
6506 && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type))
6507 && current_function_decl)
6509 error ("compound literal qualified by address-space qualifier");
6510 type = error_mark_node;
6514 pedwarn (start_loc, OPT_pedantic, "ISO C90 forbids compound literals");
6515 non_const = ((init.value && TREE_CODE (init.value) == CONSTRUCTOR)
6516 ? CONSTRUCTOR_NON_CONST (init.value)
6517 : init.original_code == C_MAYBE_CONST_EXPR);
6518 non_const |= !type_expr_const;
6519 expr.value = build_compound_literal (start_loc, type, init.value, non_const);
6520 expr.original_code = ERROR_MARK;
6521 expr.original_type = NULL;
6524 if (TREE_CODE (expr.value) == C_MAYBE_CONST_EXPR)
6526 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr.value) == NULL_TREE);
6527 C_MAYBE_CONST_EXPR_PRE (expr.value) = type_expr;
6531 gcc_assert (!non_const);
6532 expr.value = build2 (C_MAYBE_CONST_EXPR, type,
6533 type_expr, expr.value);
6536 return c_parser_postfix_expression_after_primary (parser, start_loc, expr);
6539 /* Parse a postfix expression after the initial primary or compound
6540 literal; that is, parse a series of postfix operators.
6542 EXPR_LOC is the location of the primary expression. */
6544 static struct c_expr
6545 c_parser_postfix_expression_after_primary (c_parser *parser,
6546 location_t expr_loc,
6549 struct c_expr orig_expr;
6551 VEC(tree,gc) *exprlist;
6552 VEC(tree,gc) *origtypes;
6555 location_t op_loc = c_parser_peek_token (parser)->location;
6556 switch (c_parser_peek_token (parser)->type)
6558 case CPP_OPEN_SQUARE:
6559 /* Array reference. */
6560 c_parser_consume_token (parser);
6561 idx = c_parser_expression (parser).value;
6562 c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE,
6564 expr.value = build_array_ref (op_loc, expr.value, idx);
6565 expr.original_code = ERROR_MARK;
6566 expr.original_type = NULL;
6568 case CPP_OPEN_PAREN:
6569 /* Function call. */
6570 c_parser_consume_token (parser);
6571 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
6574 exprlist = c_parser_expr_list (parser, true, false, &origtypes);
6575 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
6578 mark_exp_read (expr.value);
6579 /* FIXME diagnostics: Ideally we want the FUNCNAME, not the
6580 "(" after the FUNCNAME, which is what we have now. */
6581 expr.value = build_function_call_vec (op_loc, expr.value, exprlist,
6583 expr.original_code = ERROR_MARK;
6584 if (TREE_CODE (expr.value) == INTEGER_CST
6585 && TREE_CODE (orig_expr.value) == FUNCTION_DECL
6586 && DECL_BUILT_IN_CLASS (orig_expr.value) == BUILT_IN_NORMAL
6587 && DECL_FUNCTION_CODE (orig_expr.value) == BUILT_IN_CONSTANT_P)
6588 expr.original_code = C_MAYBE_CONST_EXPR;
6589 expr.original_type = NULL;
6590 if (exprlist != NULL)
6592 release_tree_vector (exprlist);
6593 release_tree_vector (origtypes);
6597 /* Structure element reference. */
6598 c_parser_consume_token (parser);
6599 expr = default_function_array_conversion (expr_loc, expr);
6600 if (c_parser_next_token_is (parser, CPP_NAME))
6601 ident = c_parser_peek_token (parser)->value;
6604 c_parser_error (parser, "expected identifier");
6605 expr.value = error_mark_node;
6606 expr.original_code = ERROR_MARK;
6607 expr.original_type = NULL;
6610 c_parser_consume_token (parser);
6611 expr.value = build_component_ref (op_loc, expr.value, ident);
6612 expr.original_code = ERROR_MARK;
6613 if (TREE_CODE (expr.value) != COMPONENT_REF)
6614 expr.original_type = NULL;
6617 /* Remember the original type of a bitfield. */
6618 tree field = TREE_OPERAND (expr.value, 1);
6619 if (TREE_CODE (field) != FIELD_DECL)
6620 expr.original_type = NULL;
6622 expr.original_type = DECL_BIT_FIELD_TYPE (field);
6626 /* Structure element reference. */
6627 c_parser_consume_token (parser);
6628 expr = default_function_array_conversion (expr_loc, expr);
6629 if (c_parser_next_token_is (parser, CPP_NAME))
6630 ident = c_parser_peek_token (parser)->value;
6633 c_parser_error (parser, "expected identifier");
6634 expr.value = error_mark_node;
6635 expr.original_code = ERROR_MARK;
6636 expr.original_type = NULL;
6639 c_parser_consume_token (parser);
6640 expr.value = build_component_ref (op_loc,
6641 build_indirect_ref (op_loc,
6645 expr.original_code = ERROR_MARK;
6646 if (TREE_CODE (expr.value) != COMPONENT_REF)
6647 expr.original_type = NULL;
6650 /* Remember the original type of a bitfield. */
6651 tree field = TREE_OPERAND (expr.value, 1);
6652 if (TREE_CODE (field) != FIELD_DECL)
6653 expr.original_type = NULL;
6655 expr.original_type = DECL_BIT_FIELD_TYPE (field);
6659 /* Postincrement. */
6660 c_parser_consume_token (parser);
6661 expr = default_function_array_read_conversion (expr_loc, expr);
6662 expr.value = build_unary_op (op_loc,
6663 POSTINCREMENT_EXPR, expr.value, 0);
6664 expr.original_code = ERROR_MARK;
6665 expr.original_type = NULL;
6667 case CPP_MINUS_MINUS:
6668 /* Postdecrement. */
6669 c_parser_consume_token (parser);
6670 expr = default_function_array_read_conversion (expr_loc, expr);
6671 expr.value = build_unary_op (op_loc,
6672 POSTDECREMENT_EXPR, expr.value, 0);
6673 expr.original_code = ERROR_MARK;
6674 expr.original_type = NULL;
6682 /* Parse an expression (C90 6.3.17, C99 6.5.17).
6685 assignment-expression
6686 expression , assignment-expression
6689 static struct c_expr
6690 c_parser_expression (c_parser *parser)
6693 expr = c_parser_expr_no_commas (parser, NULL);
6694 while (c_parser_next_token_is (parser, CPP_COMMA))
6698 location_t loc = c_parser_peek_token (parser)->location;
6699 location_t expr_loc;
6700 c_parser_consume_token (parser);
6701 expr_loc = c_parser_peek_token (parser)->location;
6702 lhsval = expr.value;
6703 while (TREE_CODE (lhsval) == COMPOUND_EXPR)
6704 lhsval = TREE_OPERAND (lhsval, 1);
6705 if (DECL_P (lhsval) || handled_component_p (lhsval))
6706 mark_exp_read (lhsval);
6707 next = c_parser_expr_no_commas (parser, NULL);
6708 next = default_function_array_conversion (expr_loc, next);
6709 expr.value = build_compound_expr (loc, expr.value, next.value);
6710 expr.original_code = COMPOUND_EXPR;
6711 expr.original_type = next.original_type;
6716 /* Parse an expression and convert functions or arrays to
6719 static struct c_expr
6720 c_parser_expression_conv (c_parser *parser)
6723 location_t loc = c_parser_peek_token (parser)->location;
6724 expr = c_parser_expression (parser);
6725 expr = default_function_array_conversion (loc, expr);
6729 /* Parse a non-empty list of expressions. If CONVERT_P, convert
6730 functions and arrays to pointers. If FOLD_P, fold the expressions.
6733 assignment-expression
6734 nonempty-expr-list , assignment-expression
6737 static VEC(tree,gc) *
6738 c_parser_expr_list (c_parser *parser, bool convert_p, bool fold_p,
6739 VEC(tree,gc) **p_orig_types)
6742 VEC(tree,gc) *orig_types;
6744 location_t loc = c_parser_peek_token (parser)->location;
6746 ret = make_tree_vector ();
6747 if (p_orig_types == NULL)
6750 orig_types = make_tree_vector ();
6752 expr = c_parser_expr_no_commas (parser, NULL);
6754 expr = default_function_array_read_conversion (loc, expr);
6756 expr.value = c_fully_fold (expr.value, false, NULL);
6757 VEC_quick_push (tree, ret, expr.value);
6758 if (orig_types != NULL)
6759 VEC_quick_push (tree, orig_types, expr.original_type);
6760 while (c_parser_next_token_is (parser, CPP_COMMA))
6762 c_parser_consume_token (parser);
6763 loc = c_parser_peek_token (parser)->location;
6764 expr = c_parser_expr_no_commas (parser, NULL);
6766 expr = default_function_array_read_conversion (loc, expr);
6768 expr.value = c_fully_fold (expr.value, false, NULL);
6769 VEC_safe_push (tree, gc, ret, expr.value);
6770 if (orig_types != NULL)
6771 VEC_safe_push (tree, gc, orig_types, expr.original_type);
6773 if (orig_types != NULL)
6774 *p_orig_types = orig_types;
6778 /* Parse Objective-C-specific constructs. */
6780 /* Parse an objc-class-definition.
6782 objc-class-definition:
6783 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
6784 objc-class-instance-variables[opt] objc-methodprotolist @end
6785 @implementation identifier objc-superclass[opt]
6786 objc-class-instance-variables[opt]
6787 @interface identifier ( identifier ) objc-protocol-refs[opt]
6788 objc-methodprotolist @end
6789 @interface identifier ( ) objc-protocol-refs[opt]
6790 objc-methodprotolist @end
6791 @implementation identifier ( identifier )
6796 "@interface identifier (" must start "@interface identifier (
6797 identifier ) ...": objc-methodprotolist in the first production may
6798 not start with a parenthesized identifier as a declarator of a data
6799 definition with no declaration specifiers if the objc-superclass,
6800 objc-protocol-refs and objc-class-instance-variables are omitted. */
6803 c_parser_objc_class_definition (c_parser *parser, tree attributes)
6808 if (c_parser_next_token_is_keyword (parser, RID_AT_INTERFACE))
6810 else if (c_parser_next_token_is_keyword (parser, RID_AT_IMPLEMENTATION))
6815 c_parser_consume_token (parser);
6816 if (c_parser_next_token_is_not (parser, CPP_NAME))
6818 c_parser_error (parser, "expected identifier");
6821 id1 = c_parser_peek_token (parser)->value;
6822 c_parser_consume_token (parser);
6823 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
6825 /* We have a category or class extension. */
6827 tree proto = NULL_TREE;
6828 c_parser_consume_token (parser);
6829 if (c_parser_next_token_is_not (parser, CPP_NAME))
6831 if (iface_p && c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
6833 /* We have a class extension. */
6838 c_parser_error (parser, "expected identifier or %<)%>");
6839 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
6845 id2 = c_parser_peek_token (parser)->value;
6846 c_parser_consume_token (parser);
6848 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
6851 objc_start_category_implementation (id1, id2);
6854 if (c_parser_next_token_is (parser, CPP_LESS))
6855 proto = c_parser_objc_protocol_refs (parser);
6856 objc_start_category_interface (id1, id2, proto, attributes);
6857 c_parser_objc_methodprotolist (parser);
6858 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
6859 objc_finish_interface ();
6862 if (c_parser_next_token_is (parser, CPP_COLON))
6864 c_parser_consume_token (parser);
6865 if (c_parser_next_token_is_not (parser, CPP_NAME))
6867 c_parser_error (parser, "expected identifier");
6870 superclass = c_parser_peek_token (parser)->value;
6871 c_parser_consume_token (parser);
6874 superclass = NULL_TREE;
6877 tree proto = NULL_TREE;
6878 if (c_parser_next_token_is (parser, CPP_LESS))
6879 proto = c_parser_objc_protocol_refs (parser);
6880 objc_start_class_interface (id1, superclass, proto, attributes);
6883 objc_start_class_implementation (id1, superclass);
6884 if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
6885 c_parser_objc_class_instance_variables (parser);
6888 objc_continue_interface ();
6889 c_parser_objc_methodprotolist (parser);
6890 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
6891 objc_finish_interface ();
6895 objc_continue_implementation ();
6900 /* Parse objc-class-instance-variables.
6902 objc-class-instance-variables:
6903 { objc-instance-variable-decl-list[opt] }
6905 objc-instance-variable-decl-list:
6906 objc-visibility-spec
6907 objc-instance-variable-decl ;
6909 objc-instance-variable-decl-list objc-visibility-spec
6910 objc-instance-variable-decl-list objc-instance-variable-decl ;
6911 objc-instance-variable-decl-list ;
6913 objc-visibility-spec:
6918 objc-instance-variable-decl:
6923 c_parser_objc_class_instance_variables (c_parser *parser)
6925 gcc_assert (c_parser_next_token_is (parser, CPP_OPEN_BRACE));
6926 c_parser_consume_token (parser);
6927 while (c_parser_next_token_is_not (parser, CPP_EOF))
6930 /* Parse any stray semicolon. */
6931 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
6933 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
6934 "extra semicolon in struct or union specified");
6935 c_parser_consume_token (parser);
6938 /* Stop if at the end of the instance variables. */
6939 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
6941 c_parser_consume_token (parser);
6944 /* Parse any objc-visibility-spec. */
6945 if (c_parser_next_token_is_keyword (parser, RID_AT_PRIVATE))
6947 c_parser_consume_token (parser);
6948 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE);
6951 else if (c_parser_next_token_is_keyword (parser, RID_AT_PROTECTED))
6953 c_parser_consume_token (parser);
6954 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED);
6957 else if (c_parser_next_token_is_keyword (parser, RID_AT_PUBLIC))
6959 c_parser_consume_token (parser);
6960 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC);
6963 else if (c_parser_next_token_is_keyword (parser, RID_AT_PACKAGE))
6965 c_parser_consume_token (parser);
6966 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE);
6969 else if (c_parser_next_token_is (parser, CPP_PRAGMA))
6971 c_parser_pragma (parser, pragma_external);
6975 /* Parse some comma-separated declarations. */
6976 decls = c_parser_struct_declaration (parser);
6978 /* Comma-separated instance variables are chained together in
6979 reverse order; add them one by one. */
6980 tree ivar = nreverse (decls);
6981 for (; ivar; ivar = DECL_CHAIN (ivar))
6982 objc_add_instance_variable (copy_node (ivar));
6984 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
6988 /* Parse an objc-class-declaration.
6990 objc-class-declaration:
6991 @class identifier-list ;
6995 c_parser_objc_class_declaration (c_parser *parser)
6997 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_CLASS));
6998 c_parser_consume_token (parser);
6999 /* Any identifiers, including those declared as type names, are OK
7004 if (c_parser_next_token_is_not (parser, CPP_NAME))
7006 c_parser_error (parser, "expected identifier");
7007 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
7008 parser->error = false;
7011 id = c_parser_peek_token (parser)->value;
7012 objc_declare_class (id);
7013 c_parser_consume_token (parser);
7014 if (c_parser_next_token_is (parser, CPP_COMMA))
7015 c_parser_consume_token (parser);
7019 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7022 /* Parse an objc-alias-declaration.
7024 objc-alias-declaration:
7025 @compatibility_alias identifier identifier ;
7029 c_parser_objc_alias_declaration (c_parser *parser)
7032 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_ALIAS));
7033 c_parser_consume_token (parser);
7034 if (c_parser_next_token_is_not (parser, CPP_NAME))
7036 c_parser_error (parser, "expected identifier");
7037 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
7040 id1 = c_parser_peek_token (parser)->value;
7041 c_parser_consume_token (parser);
7042 if (c_parser_next_token_is_not (parser, CPP_NAME))
7044 c_parser_error (parser, "expected identifier");
7045 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
7048 id2 = c_parser_peek_token (parser)->value;
7049 c_parser_consume_token (parser);
7050 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7051 objc_declare_alias (id1, id2);
7054 /* Parse an objc-protocol-definition.
7056 objc-protocol-definition:
7057 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
7058 @protocol identifier-list ;
7060 "@protocol identifier ;" should be resolved as "@protocol
7061 identifier-list ;": objc-methodprotolist may not start with a
7062 semicolon in the first alternative if objc-protocol-refs are
7066 c_parser_objc_protocol_definition (c_parser *parser, tree attributes)
7068 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROTOCOL));
7070 c_parser_consume_token (parser);
7071 if (c_parser_next_token_is_not (parser, CPP_NAME))
7073 c_parser_error (parser, "expected identifier");
7076 if (c_parser_peek_2nd_token (parser)->type == CPP_COMMA
7077 || c_parser_peek_2nd_token (parser)->type == CPP_SEMICOLON)
7079 tree list = NULL_TREE;
7080 /* Any identifiers, including those declared as type names, are
7085 if (c_parser_next_token_is_not (parser, CPP_NAME))
7087 c_parser_error (parser, "expected identifier");
7090 id = c_parser_peek_token (parser)->value;
7091 list = chainon (list, build_tree_list (NULL_TREE, id));
7092 c_parser_consume_token (parser);
7093 if (c_parser_next_token_is (parser, CPP_COMMA))
7094 c_parser_consume_token (parser);
7098 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7099 objc_declare_protocols (list, attributes);
7103 tree id = c_parser_peek_token (parser)->value;
7104 tree proto = NULL_TREE;
7105 c_parser_consume_token (parser);
7106 if (c_parser_next_token_is (parser, CPP_LESS))
7107 proto = c_parser_objc_protocol_refs (parser);
7108 parser->objc_pq_context = true;
7109 objc_start_protocol (id, proto, attributes);
7110 c_parser_objc_methodprotolist (parser);
7111 c_parser_require_keyword (parser, RID_AT_END, "expected %<@end%>");
7112 parser->objc_pq_context = false;
7113 objc_finish_interface ();
7117 /* Parse an objc-method-type.
7123 Return true if it is a class method (+) and false if it is
7124 an instance method (-).
7127 c_parser_objc_method_type (c_parser *parser)
7129 switch (c_parser_peek_token (parser)->type)
7132 c_parser_consume_token (parser);
7135 c_parser_consume_token (parser);
7142 /* Parse an objc-method-definition.
7144 objc-method-definition:
7145 objc-method-type objc-method-decl ;[opt] compound-statement
7149 c_parser_objc_method_definition (c_parser *parser)
7151 bool is_class_method = c_parser_objc_method_type (parser);
7152 tree decl, attributes = NULL_TREE;
7153 parser->objc_pq_context = true;
7154 decl = c_parser_objc_method_decl (parser, is_class_method, &attributes);
7155 if (decl == error_mark_node)
7156 return; /* Bail here. */
7158 if (c_parser_next_token_is (parser, CPP_SEMICOLON))
7160 c_parser_consume_token (parser);
7161 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
7162 "extra semicolon in method definition specified");
7165 if (!c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7167 c_parser_error (parser, "expected %<{%>");
7171 parser->objc_pq_context = false;
7172 if (objc_start_method_definition (is_class_method, decl, attributes))
7174 add_stmt (c_parser_compound_statement (parser));
7175 objc_finish_method_definition (current_function_decl);
7179 /* This code is executed when we find a method definition
7180 outside of an @implementation context (or invalid for other
7181 reasons). Parse the method (to keep going) but do not emit
7184 c_parser_compound_statement (parser);
7188 /* Parse an objc-methodprotolist.
7190 objc-methodprotolist:
7192 objc-methodprotolist objc-methodproto
7193 objc-methodprotolist declaration
7194 objc-methodprotolist ;
7198 The declaration is a data definition, which may be missing
7199 declaration specifiers under the same rules and diagnostics as
7200 other data definitions outside functions, and the stray semicolon
7201 is diagnosed the same way as a stray semicolon outside a
7205 c_parser_objc_methodprotolist (c_parser *parser)
7209 /* The list is terminated by @end. */
7210 switch (c_parser_peek_token (parser)->type)
7213 pedwarn (c_parser_peek_token (parser)->location, OPT_pedantic,
7214 "ISO C does not allow extra %<;%> outside of a function");
7215 c_parser_consume_token (parser);
7219 c_parser_objc_methodproto (parser);
7222 c_parser_pragma (parser, pragma_external);
7227 if (c_parser_next_token_is_keyword (parser, RID_AT_END))
7229 else if (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY))
7230 c_parser_objc_at_property_declaration (parser);
7231 else if (c_parser_next_token_is_keyword (parser, RID_AT_OPTIONAL))
7233 objc_set_method_opt (true);
7234 c_parser_consume_token (parser);
7236 else if (c_parser_next_token_is_keyword (parser, RID_AT_REQUIRED))
7238 objc_set_method_opt (false);
7239 c_parser_consume_token (parser);
7242 c_parser_declaration_or_fndef (parser, false, false, true,
7249 /* Parse an objc-methodproto.
7252 objc-method-type objc-method-decl ;
7256 c_parser_objc_methodproto (c_parser *parser)
7258 bool is_class_method = c_parser_objc_method_type (parser);
7259 tree decl, attributes = NULL_TREE;
7261 /* Remember protocol qualifiers in prototypes. */
7262 parser->objc_pq_context = true;
7263 decl = c_parser_objc_method_decl (parser, is_class_method, &attributes);
7264 /* Forget protocol qualifiers now. */
7265 parser->objc_pq_context = false;
7267 /* Do not allow the presence of attributes to hide an erroneous
7268 method implementation in the interface section. */
7269 if (!c_parser_next_token_is (parser, CPP_SEMICOLON))
7271 c_parser_error (parser, "expected %<;%>");
7275 if (decl != error_mark_node)
7276 objc_add_method_declaration (is_class_method, decl, attributes);
7278 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
7281 /* If we are at a position that method attributes may be present, check that
7282 there are not any parsed already (a syntax error) and then collect any
7283 specified at the current location. Finally, if new attributes were present,
7284 check that the next token is legal ( ';' for decls and '{' for defs). */
7287 c_parser_objc_maybe_method_attributes (c_parser* parser, tree* attributes)
7292 c_parser_error (parser,
7293 "method attributes must be specified at the end only");
7294 *attributes = NULL_TREE;
7298 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
7299 *attributes = c_parser_attributes (parser);
7301 /* If there were no attributes here, just report any earlier error. */
7302 if (*attributes == NULL_TREE || bad)
7305 /* If the attributes are followed by a ; or {, then just report any earlier
7307 if (c_parser_next_token_is (parser, CPP_SEMICOLON)
7308 || c_parser_next_token_is (parser, CPP_OPEN_BRACE))
7311 /* We've got attributes, but not at the end. */
7312 c_parser_error (parser,
7313 "expected %<;%> or %<{%> after method attribute definition");
7317 /* Parse an objc-method-decl.
7320 ( objc-type-name ) objc-selector
7322 ( objc-type-name ) objc-keyword-selector objc-optparmlist
7323 objc-keyword-selector objc-optparmlist
7326 objc-keyword-selector:
7328 objc-keyword-selector objc-keyword-decl
7331 objc-selector : ( objc-type-name ) identifier
7332 objc-selector : identifier
7333 : ( objc-type-name ) identifier
7337 objc-optparms objc-optellipsis
7341 objc-opt-parms , parameter-declaration
7349 c_parser_objc_method_decl (c_parser *parser, bool is_class_method, tree *attributes)
7351 tree type = NULL_TREE;
7353 tree parms = NULL_TREE;
7354 bool ellipsis = false;
7355 bool attr_err = false;
7357 *attributes = NULL_TREE;
7358 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7360 c_parser_consume_token (parser);
7361 type = c_parser_objc_type_name (parser);
7362 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7364 sel = c_parser_objc_selector (parser);
7365 /* If there is no selector, or a colon follows, we have an
7366 objc-keyword-selector. If there is a selector, and a colon does
7367 not follow, that selector ends the objc-method-decl. */
7368 if (!sel || c_parser_next_token_is (parser, CPP_COLON))
7371 tree list = NULL_TREE;
7374 tree atype = NULL_TREE, id, keyworddecl;
7375 tree param_attr = NULL_TREE;
7376 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7378 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7380 c_parser_consume_token (parser);
7381 atype = c_parser_objc_type_name (parser);
7382 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
7385 /* New ObjC allows attributes on method parameters. */
7386 if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
7387 param_attr = c_parser_attributes (parser);
7388 if (c_parser_next_token_is_not (parser, CPP_NAME))
7390 c_parser_error (parser, "expected identifier");
7391 return error_mark_node;
7393 id = c_parser_peek_token (parser)->value;
7394 c_parser_consume_token (parser);
7395 keyworddecl = objc_build_keyword_decl (tsel, atype, id, param_attr);
7396 list = chainon (list, keyworddecl);
7397 tsel = c_parser_objc_selector (parser);
7398 if (!tsel && c_parser_next_token_is_not (parser, CPP_COLON))
7402 attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ;
7404 /* Parse the optional parameter list. Optional Objective-C
7405 method parameters follow the C syntax, and may include '...'
7406 to denote a variable number of arguments. */
7407 parms = make_node (TREE_LIST);
7408 while (c_parser_next_token_is (parser, CPP_COMMA))
7410 struct c_parm *parm;
7411 c_parser_consume_token (parser);
7412 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
7415 c_parser_consume_token (parser);
7416 attr_err |= c_parser_objc_maybe_method_attributes
7417 (parser, attributes) ;
7420 parm = c_parser_parameter_declaration (parser, NULL_TREE);
7423 parms = chainon (parms,
7424 build_tree_list (NULL_TREE, grokparm (parm)));
7429 attr_err |= c_parser_objc_maybe_method_attributes (parser, attributes) ;
7433 c_parser_error (parser, "objective-c method declaration is expected");
7434 return error_mark_node;
7438 return error_mark_node;
7440 return objc_build_method_signature (is_class_method, type, sel, parms, ellipsis);
7443 /* Parse an objc-type-name.
7446 objc-type-qualifiers[opt] type-name
7447 objc-type-qualifiers[opt]
7449 objc-type-qualifiers:
7451 objc-type-qualifiers objc-type-qualifier
7453 objc-type-qualifier: one of
7454 in out inout bycopy byref oneway
7458 c_parser_objc_type_name (c_parser *parser)
7460 tree quals = NULL_TREE;
7461 struct c_type_name *type_name = NULL;
7462 tree type = NULL_TREE;
7465 c_token *token = c_parser_peek_token (parser);
7466 if (token->type == CPP_KEYWORD
7467 && (token->keyword == RID_IN
7468 || token->keyword == RID_OUT
7469 || token->keyword == RID_INOUT
7470 || token->keyword == RID_BYCOPY
7471 || token->keyword == RID_BYREF
7472 || token->keyword == RID_ONEWAY))
7474 quals = chainon (build_tree_list (NULL_TREE, token->value), quals);
7475 c_parser_consume_token (parser);
7480 if (c_parser_next_tokens_start_typename (parser, cla_prefer_type))
7481 type_name = c_parser_type_name (parser);
7483 type = groktypename (type_name, NULL, NULL);
7485 /* If the type is unknown, and error has already been produced and
7486 we need to recover from the error. In that case, use NULL_TREE
7487 for the type, as if no type had been specified; this will use the
7488 default type ('id') which is good for error recovery. */
7489 if (type == error_mark_node)
7492 return build_tree_list (quals, type);
7495 /* Parse objc-protocol-refs.
7502 c_parser_objc_protocol_refs (c_parser *parser)
7504 tree list = NULL_TREE;
7505 gcc_assert (c_parser_next_token_is (parser, CPP_LESS));
7506 c_parser_consume_token (parser);
7507 /* Any identifiers, including those declared as type names, are OK
7512 if (c_parser_next_token_is_not (parser, CPP_NAME))
7514 c_parser_error (parser, "expected identifier");
7517 id = c_parser_peek_token (parser)->value;
7518 list = chainon (list, build_tree_list (NULL_TREE, id));
7519 c_parser_consume_token (parser);
7520 if (c_parser_next_token_is (parser, CPP_COMMA))
7521 c_parser_consume_token (parser);
7525 c_parser_require (parser, CPP_GREATER, "expected %<>%>");
7529 /* Parse an objc-try-catch-finally-statement.
7531 objc-try-catch-finally-statement:
7532 @try compound-statement objc-catch-list[opt]
7533 @try compound-statement objc-catch-list[opt] @finally compound-statement
7536 @catch ( objc-catch-parameter-declaration ) compound-statement
7537 objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
7539 objc-catch-parameter-declaration:
7540 parameter-declaration
7543 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
7545 PS: This function is identical to cp_parser_objc_try_catch_finally_statement
7546 for C++. Keep them in sync. */
7549 c_parser_objc_try_catch_finally_statement (c_parser *parser)
7551 location_t location;
7554 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY));
7555 c_parser_consume_token (parser);
7556 location = c_parser_peek_token (parser)->location;
7557 objc_maybe_warn_exceptions (location);
7558 stmt = c_parser_compound_statement (parser);
7559 objc_begin_try_stmt (location, stmt);
7561 while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH))
7563 struct c_parm *parm;
7564 tree parameter_declaration = error_mark_node;
7565 bool seen_open_paren = false;
7567 c_parser_consume_token (parser);
7568 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7569 seen_open_paren = true;
7570 if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
7572 /* We have "@catch (...)" (where the '...' are literally
7573 what is in the code). Skip the '...'.
7574 parameter_declaration is set to NULL_TREE, and
7575 objc_being_catch_clauses() knows that that means
7577 c_parser_consume_token (parser);
7578 parameter_declaration = NULL_TREE;
7582 /* We have "@catch (NSException *exception)" or something
7583 like that. Parse the parameter declaration. */
7584 parm = c_parser_parameter_declaration (parser, NULL_TREE);
7586 parameter_declaration = error_mark_node;
7588 parameter_declaration = grokparm (parm);
7590 if (seen_open_paren)
7591 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7594 /* If there was no open parenthesis, we are recovering from
7595 an error, and we are trying to figure out what mistake
7596 the user has made. */
7598 /* If there is an immediate closing parenthesis, the user
7599 probably forgot the opening one (ie, they typed "@catch
7600 NSException *e)". Parse the closing parenthesis and keep
7602 if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
7603 c_parser_consume_token (parser);
7605 /* If these is no immediate closing parenthesis, the user
7606 probably doesn't know that parenthesis are required at
7607 all (ie, they typed "@catch NSException *e"). So, just
7608 forget about the closing parenthesis and keep going. */
7610 objc_begin_catch_clause (parameter_declaration);
7611 if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
7612 c_parser_compound_statement_nostart (parser);
7613 objc_finish_catch_clause ();
7615 if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
7617 c_parser_consume_token (parser);
7618 location = c_parser_peek_token (parser)->location;
7619 stmt = c_parser_compound_statement (parser);
7620 objc_build_finally_clause (location, stmt);
7622 objc_finish_try_stmt ();
7625 /* Parse an objc-synchronized-statement.
7627 objc-synchronized-statement:
7628 @synchronized ( expression ) compound-statement
7632 c_parser_objc_synchronized_statement (c_parser *parser)
7636 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
7637 c_parser_consume_token (parser);
7638 loc = c_parser_peek_token (parser)->location;
7639 objc_maybe_warn_exceptions (loc);
7640 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
7642 expr = c_parser_expression (parser).value;
7643 expr = c_fully_fold (expr, false, NULL);
7644 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
7647 expr = error_mark_node;
7648 stmt = c_parser_compound_statement (parser);
7649 objc_build_synchronized (loc, expr, stmt);
7652 /* Parse an objc-selector; return NULL_TREE without an error if the
7653 next token is not an objc-selector.
7658 enum struct union if else while do for switch case default
7659 break continue return goto asm sizeof typeof __alignof
7660 unsigned long const short volatile signed restrict _Complex
7661 in out inout bycopy byref oneway int char float double void _Bool
7663 ??? Why this selection of keywords but not, for example, storage
7664 class specifiers? */
7667 c_parser_objc_selector (c_parser *parser)
7669 c_token *token = c_parser_peek_token (parser);
7670 tree value = token->value;
7671 if (token->type == CPP_NAME)
7673 c_parser_consume_token (parser);
7676 if (token->type != CPP_KEYWORD)
7678 switch (token->keyword)
7720 c_parser_consume_token (parser);
7727 /* Parse an objc-selector-arg.
7731 objc-keywordname-list
7733 objc-keywordname-list:
7735 objc-keywordname-list objc-keywordname
7743 c_parser_objc_selector_arg (c_parser *parser)
7745 tree sel = c_parser_objc_selector (parser);
7746 tree list = NULL_TREE;
7747 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
7751 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7753 list = chainon (list, build_tree_list (sel, NULL_TREE));
7754 sel = c_parser_objc_selector (parser);
7755 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
7761 /* Parse an objc-receiver.
7770 c_parser_objc_receiver (c_parser *parser)
7772 if (c_parser_peek_token (parser)->type == CPP_NAME
7773 && (c_parser_peek_token (parser)->id_kind == C_ID_TYPENAME
7774 || c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
7776 tree id = c_parser_peek_token (parser)->value;
7777 c_parser_consume_token (parser);
7778 return objc_get_class_reference (id);
7780 return c_fully_fold (c_parser_expression (parser).value, false, NULL);
7783 /* Parse objc-message-args.
7787 objc-keywordarg-list
7789 objc-keywordarg-list:
7791 objc-keywordarg-list objc-keywordarg
7794 objc-selector : objc-keywordexpr
7799 c_parser_objc_message_args (c_parser *parser)
7801 tree sel = c_parser_objc_selector (parser);
7802 tree list = NULL_TREE;
7803 if (sel && c_parser_next_token_is_not (parser, CPP_COLON))
7808 if (!c_parser_require (parser, CPP_COLON, "expected %<:%>"))
7809 return error_mark_node;
7810 keywordexpr = c_parser_objc_keywordexpr (parser);
7811 list = chainon (list, build_tree_list (sel, keywordexpr));
7812 sel = c_parser_objc_selector (parser);
7813 if (!sel && c_parser_next_token_is_not (parser, CPP_COLON))
7819 /* Parse an objc-keywordexpr.
7826 c_parser_objc_keywordexpr (c_parser *parser)
7829 VEC(tree,gc) *expr_list = c_parser_expr_list (parser, true, true, NULL);
7830 if (VEC_length (tree, expr_list) == 1)
7832 /* Just return the expression, remove a level of
7834 ret = VEC_index (tree, expr_list, 0);
7838 /* We have a comma expression, we will collapse later. */
7839 ret = build_tree_list_vec (expr_list);
7841 release_tree_vector (expr_list);
7845 /* A check, needed in several places, that ObjC interface, implementation or
7846 method definitions are not prefixed by incorrect items. */
7848 c_parser_objc_diagnose_bad_element_prefix (c_parser *parser,
7849 struct c_declspecs *specs)
7851 if (!specs->declspecs_seen_p || specs->non_sc_seen_p
7852 || specs->typespec_kind != ctsk_none)
7854 c_parser_error (parser,
7855 "no type or storage class may be specified here,");
7856 c_parser_skip_to_end_of_block_or_statement (parser);
7862 /* Parse an Objective-C @property declaration. The syntax is:
7864 objc-property-declaration:
7865 '@property' objc-property-attributes[opt] struct-declaration ;
7867 objc-property-attributes:
7868 '(' objc-property-attribute-list ')'
7870 objc-property-attribute-list:
7871 objc-property-attribute
7872 objc-property-attribute-list, objc-property-attribute
7874 objc-property-attribute
7875 'getter' = identifier
7876 'setter' = identifier
7885 @property NSString *name;
7886 @property (readonly) id object;
7887 @property (retain, nonatomic, getter=getTheName) id name;
7888 @property int a, b, c;
7890 PS: This function is identical to cp_parser_objc_at_propery_declaration
7891 for C++. Keep them in sync. */
7893 c_parser_objc_at_property_declaration (c_parser *parser)
7895 /* The following variables hold the attributes of the properties as
7896 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
7897 seen. When we see an attribute, we set them to 'true' (if they
7898 are boolean properties) or to the identifier (if they have an
7899 argument, ie, for getter and setter). Note that here we only
7900 parse the list of attributes, check the syntax and accumulate the
7901 attributes that we find. objc_add_property_declaration() will
7902 then process the information. */
7903 bool property_assign = false;
7904 bool property_copy = false;
7905 tree property_getter_ident = NULL_TREE;
7906 bool property_nonatomic = false;
7907 bool property_readonly = false;
7908 bool property_readwrite = false;
7909 bool property_retain = false;
7910 tree property_setter_ident = NULL_TREE;
7912 /* 'properties' is the list of properties that we read. Usually a
7913 single one, but maybe more (eg, in "@property int a, b, c;" there
7918 loc = c_parser_peek_token (parser)->location;
7919 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY));
7921 c_parser_consume_token (parser); /* Eat '@property'. */
7923 /* Parse the optional attribute list... */
7924 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
7927 c_parser_consume_token (parser);
7929 /* Property attribute keywords are valid now. */
7930 parser->objc_property_attr_context = true;
7934 bool syntax_error = false;
7935 c_token *token = c_parser_peek_token (parser);
7938 if (token->type != CPP_KEYWORD)
7940 if (token->type == CPP_CLOSE_PAREN)
7941 c_parser_error (parser, "expected identifier");
7944 c_parser_consume_token (parser);
7945 c_parser_error (parser, "unknown property attribute");
7949 keyword = token->keyword;
7950 c_parser_consume_token (parser);
7953 case RID_ASSIGN: property_assign = true; break;
7954 case RID_COPY: property_copy = true; break;
7955 case RID_NONATOMIC: property_nonatomic = true; break;
7956 case RID_READONLY: property_readonly = true; break;
7957 case RID_READWRITE: property_readwrite = true; break;
7958 case RID_RETAIN: property_retain = true; break;
7962 if (c_parser_next_token_is_not (parser, CPP_EQ))
7964 if (keyword == RID_GETTER)
7965 c_parser_error (parser,
7966 "missing %<=%> (after %<getter%> attribute)");
7968 c_parser_error (parser,
7969 "missing %<=%> (after %<setter%> attribute)");
7970 syntax_error = true;
7973 c_parser_consume_token (parser); /* eat the = */
7974 if (c_parser_next_token_is_not (parser, CPP_NAME))
7976 c_parser_error (parser, "expected identifier");
7977 syntax_error = true;
7980 if (keyword == RID_SETTER)
7982 if (property_setter_ident != NULL_TREE)
7983 c_parser_error (parser, "the %<setter%> attribute may only be specified once");
7985 property_setter_ident = c_parser_peek_token (parser)->value;
7986 c_parser_consume_token (parser);
7987 if (c_parser_next_token_is_not (parser, CPP_COLON))
7988 c_parser_error (parser, "setter name must terminate with %<:%>");
7990 c_parser_consume_token (parser);
7994 if (property_getter_ident != NULL_TREE)
7995 c_parser_error (parser, "the %<getter%> attribute may only be specified once");
7997 property_getter_ident = c_parser_peek_token (parser)->value;
7998 c_parser_consume_token (parser);
8002 c_parser_error (parser, "unknown property attribute");
8003 syntax_error = true;
8010 if (c_parser_next_token_is (parser, CPP_COMMA))
8011 c_parser_consume_token (parser);
8015 parser->objc_property_attr_context = false;
8016 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8018 /* ... and the property declaration(s). */
8019 properties = c_parser_struct_declaration (parser);
8021 if (properties == error_mark_node)
8023 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
8024 parser->error = false;
8028 if (properties == NULL_TREE)
8029 c_parser_error (parser, "expected identifier");
8032 /* Comma-separated properties are chained together in
8033 reverse order; add them one by one. */
8034 properties = nreverse (properties);
8036 for (; properties; properties = TREE_CHAIN (properties))
8037 objc_add_property_declaration (loc, copy_node (properties),
8038 property_readonly, property_readwrite,
8039 property_assign, property_retain,
8040 property_copy, property_nonatomic,
8041 property_getter_ident, property_setter_ident);
8044 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
8045 parser->error = false;
8048 /* Parse an Objective-C @synthesize declaration. The syntax is:
8050 objc-synthesize-declaration:
8051 @synthesize objc-synthesize-identifier-list ;
8053 objc-synthesize-identifier-list:
8054 objc-synthesize-identifier
8055 objc-synthesize-identifier-list, objc-synthesize-identifier
8057 objc-synthesize-identifier
8059 identifier = identifier
8062 @synthesize MyProperty;
8063 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
8065 PS: This function is identical to cp_parser_objc_at_synthesize_declaration
8066 for C++. Keep them in sync.
8069 c_parser_objc_at_synthesize_declaration (c_parser *parser)
8071 tree list = NULL_TREE;
8073 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNTHESIZE));
8074 loc = c_parser_peek_token (parser)->location;
8076 c_parser_consume_token (parser);
8079 tree property, ivar;
8080 if (c_parser_next_token_is_not (parser, CPP_NAME))
8082 c_parser_error (parser, "expected identifier");
8083 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
8084 /* Once we find the semicolon, we can resume normal parsing.
8085 We have to reset parser->error manually because
8086 c_parser_skip_until_found() won't reset it for us if the
8087 next token is precisely a semicolon. */
8088 parser->error = false;
8091 property = c_parser_peek_token (parser)->value;
8092 c_parser_consume_token (parser);
8093 if (c_parser_next_token_is (parser, CPP_EQ))
8095 c_parser_consume_token (parser);
8096 if (c_parser_next_token_is_not (parser, CPP_NAME))
8098 c_parser_error (parser, "expected identifier");
8099 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
8100 parser->error = false;
8103 ivar = c_parser_peek_token (parser)->value;
8104 c_parser_consume_token (parser);
8108 list = chainon (list, build_tree_list (ivar, property));
8109 if (c_parser_next_token_is (parser, CPP_COMMA))
8110 c_parser_consume_token (parser);
8114 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
8115 objc_add_synthesize_declaration (loc, list);
8118 /* Parse an Objective-C @dynamic declaration. The syntax is:
8120 objc-dynamic-declaration:
8121 @dynamic identifier-list ;
8124 @dynamic MyProperty;
8125 @dynamic MyProperty, AnotherProperty;
8127 PS: This function is identical to cp_parser_objc_at_dynamic_declaration
8128 for C++. Keep them in sync.
8131 c_parser_objc_at_dynamic_declaration (c_parser *parser)
8133 tree list = NULL_TREE;
8135 gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_DYNAMIC));
8136 loc = c_parser_peek_token (parser)->location;
8138 c_parser_consume_token (parser);
8142 if (c_parser_next_token_is_not (parser, CPP_NAME))
8144 c_parser_error (parser, "expected identifier");
8145 c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
8146 parser->error = false;
8149 property = c_parser_peek_token (parser)->value;
8150 list = chainon (list, build_tree_list (NULL_TREE, property));
8151 c_parser_consume_token (parser);
8152 if (c_parser_next_token_is (parser, CPP_COMMA))
8153 c_parser_consume_token (parser);
8157 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
8158 objc_add_dynamic_declaration (loc, list);
8162 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
8163 should be considered, statements. ALLOW_STMT is true if we're within
8164 the context of a function and such pragmas are to be allowed. Returns
8165 true if we actually parsed such a pragma. */
8168 c_parser_pragma (c_parser *parser, enum pragma_context context)
8172 id = c_parser_peek_token (parser)->pragma_kind;
8173 gcc_assert (id != PRAGMA_NONE);
8177 case PRAGMA_OMP_BARRIER:
8178 if (context != pragma_compound)
8180 if (context == pragma_stmt)
8181 c_parser_error (parser, "%<#pragma omp barrier%> may only be "
8182 "used in compound statements");
8185 c_parser_omp_barrier (parser);
8188 case PRAGMA_OMP_FLUSH:
8189 if (context != pragma_compound)
8191 if (context == pragma_stmt)
8192 c_parser_error (parser, "%<#pragma omp flush%> may only be "
8193 "used in compound statements");
8196 c_parser_omp_flush (parser);
8199 case PRAGMA_OMP_TASKWAIT:
8200 if (context != pragma_compound)
8202 if (context == pragma_stmt)
8203 c_parser_error (parser, "%<#pragma omp taskwait%> may only be "
8204 "used in compound statements");
8207 c_parser_omp_taskwait (parser);
8210 case PRAGMA_OMP_THREADPRIVATE:
8211 c_parser_omp_threadprivate (parser);
8214 case PRAGMA_OMP_SECTION:
8215 error_at (c_parser_peek_token (parser)->location,
8216 "%<#pragma omp section%> may only be used in "
8217 "%<#pragma omp sections%> construct");
8218 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
8221 case PRAGMA_GCC_PCH_PREPROCESS:
8222 c_parser_error (parser, "%<#pragma GCC pch_preprocess%> must be first");
8223 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
8227 if (id < PRAGMA_FIRST_EXTERNAL)
8229 if (context == pragma_external)
8232 c_parser_error (parser, "expected declaration specifiers");
8233 c_parser_skip_until_found (parser, CPP_PRAGMA_EOL, NULL);
8236 c_parser_omp_construct (parser);
8242 c_parser_consume_pragma (parser);
8243 c_invoke_pragma_handler (id);
8245 /* Skip to EOL, but suppress any error message. Those will have been
8246 generated by the handler routine through calling error, as opposed
8247 to calling c_parser_error. */
8248 parser->error = true;
8249 c_parser_skip_to_pragma_eol (parser);
8254 /* The interface the pragma parsers have to the lexer. */
8257 pragma_lex (tree *value)
8259 c_token *tok = c_parser_peek_token (the_parser);
8260 enum cpp_ttype ret = tok->type;
8262 *value = tok->value;
8263 if (ret == CPP_PRAGMA_EOL || ret == CPP_EOF)
8267 if (ret == CPP_KEYWORD)
8269 c_parser_consume_token (the_parser);
8276 c_parser_pragma_pch_preprocess (c_parser *parser)
8280 c_parser_consume_pragma (parser);
8281 if (c_parser_next_token_is (parser, CPP_STRING))
8283 name = c_parser_peek_token (parser)->value;
8284 c_parser_consume_token (parser);
8287 c_parser_error (parser, "expected string literal");
8288 c_parser_skip_to_pragma_eol (parser);
8291 c_common_pch_pragma (parse_in, TREE_STRING_POINTER (name));
8294 /* OpenMP 2.5 parsing routines. */
8296 /* Returns name of the next clause.
8297 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
8298 the token is not consumed. Otherwise appropriate pragma_omp_clause is
8299 returned and the token is consumed. */
8301 static pragma_omp_clause
8302 c_parser_omp_clause_name (c_parser *parser)
8304 pragma_omp_clause result = PRAGMA_OMP_CLAUSE_NONE;
8306 if (c_parser_next_token_is_keyword (parser, RID_IF))
8307 result = PRAGMA_OMP_CLAUSE_IF;
8308 else if (c_parser_next_token_is_keyword (parser, RID_DEFAULT))
8309 result = PRAGMA_OMP_CLAUSE_DEFAULT;
8310 else if (c_parser_next_token_is (parser, CPP_NAME))
8312 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
8317 if (!strcmp ("collapse", p))
8318 result = PRAGMA_OMP_CLAUSE_COLLAPSE;
8319 else if (!strcmp ("copyin", p))
8320 result = PRAGMA_OMP_CLAUSE_COPYIN;
8321 else if (!strcmp ("copyprivate", p))
8322 result = PRAGMA_OMP_CLAUSE_COPYPRIVATE;
8325 if (!strcmp ("firstprivate", p))
8326 result = PRAGMA_OMP_CLAUSE_FIRSTPRIVATE;
8329 if (!strcmp ("lastprivate", p))
8330 result = PRAGMA_OMP_CLAUSE_LASTPRIVATE;
8333 if (!strcmp ("nowait", p))
8334 result = PRAGMA_OMP_CLAUSE_NOWAIT;
8335 else if (!strcmp ("num_threads", p))
8336 result = PRAGMA_OMP_CLAUSE_NUM_THREADS;
8339 if (!strcmp ("ordered", p))
8340 result = PRAGMA_OMP_CLAUSE_ORDERED;
8343 if (!strcmp ("private", p))
8344 result = PRAGMA_OMP_CLAUSE_PRIVATE;
8347 if (!strcmp ("reduction", p))
8348 result = PRAGMA_OMP_CLAUSE_REDUCTION;
8351 if (!strcmp ("schedule", p))
8352 result = PRAGMA_OMP_CLAUSE_SCHEDULE;
8353 else if (!strcmp ("shared", p))
8354 result = PRAGMA_OMP_CLAUSE_SHARED;
8357 if (!strcmp ("untied", p))
8358 result = PRAGMA_OMP_CLAUSE_UNTIED;
8363 if (result != PRAGMA_OMP_CLAUSE_NONE)
8364 c_parser_consume_token (parser);
8369 /* Validate that a clause of the given type does not already exist. */
8372 check_no_duplicate_clause (tree clauses, enum omp_clause_code code,
8377 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
8378 if (OMP_CLAUSE_CODE (c) == code)
8380 location_t loc = OMP_CLAUSE_LOCATION (c);
8381 error_at (loc, "too many %qs clauses", name);
8389 variable-list , identifier
8391 If KIND is nonzero, create the appropriate node and install the
8392 decl in OMP_CLAUSE_DECL and add the node to the head of the list.
8393 If KIND is nonzero, CLAUSE_LOC is the location of the clause.
8395 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
8396 return the list created. */
8399 c_parser_omp_variable_list (c_parser *parser,
8400 location_t clause_loc,
8401 enum omp_clause_code kind,
8404 if (c_parser_next_token_is_not (parser, CPP_NAME)
8405 || c_parser_peek_token (parser)->id_kind != C_ID_ID)
8406 c_parser_error (parser, "expected identifier");
8408 while (c_parser_next_token_is (parser, CPP_NAME)
8409 && c_parser_peek_token (parser)->id_kind == C_ID_ID)
8411 tree t = lookup_name (c_parser_peek_token (parser)->value);
8414 undeclared_variable (c_parser_peek_token (parser)->location,
8415 c_parser_peek_token (parser)->value);
8416 else if (t == error_mark_node)
8420 tree u = build_omp_clause (clause_loc, kind);
8421 OMP_CLAUSE_DECL (u) = t;
8422 OMP_CLAUSE_CHAIN (u) = list;
8426 list = tree_cons (t, NULL_TREE, list);
8428 c_parser_consume_token (parser);
8430 if (c_parser_next_token_is_not (parser, CPP_COMMA))
8433 c_parser_consume_token (parser);
8439 /* Similarly, but expect leading and trailing parenthesis. This is a very
8440 common case for omp clauses. */
8443 c_parser_omp_var_list_parens (c_parser *parser, enum omp_clause_code kind,
8446 /* The clauses location. */
8447 location_t loc = c_parser_peek_token (parser)->location;
8449 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8451 list = c_parser_omp_variable_list (parser, loc, kind, list);
8452 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8458 collapse ( constant-expression ) */
8461 c_parser_omp_clause_collapse (c_parser *parser, tree list)
8463 tree c, num = error_mark_node;
8467 check_no_duplicate_clause (list, OMP_CLAUSE_COLLAPSE, "collapse");
8469 loc = c_parser_peek_token (parser)->location;
8470 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8472 num = c_parser_expr_no_commas (parser, NULL).value;
8473 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8475 if (num == error_mark_node)
8477 if (!INTEGRAL_TYPE_P (TREE_TYPE (num))
8478 || !host_integerp (num, 0)
8479 || (n = tree_low_cst (num, 0)) <= 0
8483 "collapse argument needs positive constant integer expression");
8486 c = build_omp_clause (loc, OMP_CLAUSE_COLLAPSE);
8487 OMP_CLAUSE_COLLAPSE_EXPR (c) = num;
8488 OMP_CLAUSE_CHAIN (c) = list;
8493 copyin ( variable-list ) */
8496 c_parser_omp_clause_copyin (c_parser *parser, tree list)
8498 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYIN, list);
8502 copyprivate ( variable-list ) */
8505 c_parser_omp_clause_copyprivate (c_parser *parser, tree list)
8507 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_COPYPRIVATE, list);
8511 default ( shared | none ) */
8514 c_parser_omp_clause_default (c_parser *parser, tree list)
8516 enum omp_clause_default_kind kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;
8517 location_t loc = c_parser_peek_token (parser)->location;
8520 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8522 if (c_parser_next_token_is (parser, CPP_NAME))
8524 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
8529 if (strcmp ("none", p) != 0)
8531 kind = OMP_CLAUSE_DEFAULT_NONE;
8535 if (strcmp ("shared", p) != 0)
8537 kind = OMP_CLAUSE_DEFAULT_SHARED;
8544 c_parser_consume_token (parser);
8549 c_parser_error (parser, "expected %<none%> or %<shared%>");
8551 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8553 if (kind == OMP_CLAUSE_DEFAULT_UNSPECIFIED)
8556 check_no_duplicate_clause (list, OMP_CLAUSE_DEFAULT, "default");
8557 c = build_omp_clause (loc, OMP_CLAUSE_DEFAULT);
8558 OMP_CLAUSE_CHAIN (c) = list;
8559 OMP_CLAUSE_DEFAULT_KIND (c) = kind;
8565 firstprivate ( variable-list ) */
8568 c_parser_omp_clause_firstprivate (c_parser *parser, tree list)
8570 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_FIRSTPRIVATE, list);
8574 if ( expression ) */
8577 c_parser_omp_clause_if (c_parser *parser, tree list)
8579 location_t loc = c_parser_peek_token (parser)->location;
8580 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
8582 tree t = c_parser_paren_condition (parser);
8585 check_no_duplicate_clause (list, OMP_CLAUSE_IF, "if");
8587 c = build_omp_clause (loc, OMP_CLAUSE_IF);
8588 OMP_CLAUSE_IF_EXPR (c) = t;
8589 OMP_CLAUSE_CHAIN (c) = list;
8593 c_parser_error (parser, "expected %<(%>");
8599 lastprivate ( variable-list ) */
8602 c_parser_omp_clause_lastprivate (c_parser *parser, tree list)
8604 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_LASTPRIVATE, list);
8611 c_parser_omp_clause_nowait (c_parser *parser ATTRIBUTE_UNUSED, tree list)
8614 location_t loc = c_parser_peek_token (parser)->location;
8616 check_no_duplicate_clause (list, OMP_CLAUSE_NOWAIT, "nowait");
8618 c = build_omp_clause (loc, OMP_CLAUSE_NOWAIT);
8619 OMP_CLAUSE_CHAIN (c) = list;
8624 num_threads ( expression ) */
8627 c_parser_omp_clause_num_threads (c_parser *parser, tree list)
8629 location_t num_threads_loc = c_parser_peek_token (parser)->location;
8630 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8632 location_t expr_loc = c_parser_peek_token (parser)->location;
8633 tree c, t = c_parser_expression (parser).value;
8634 t = c_fully_fold (t, false, NULL);
8636 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8638 if (!INTEGRAL_TYPE_P (TREE_TYPE (t)))
8640 c_parser_error (parser, "expected integer expression");
8644 /* Attempt to statically determine when the number isn't positive. */
8645 c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
8646 build_int_cst (TREE_TYPE (t), 0));
8647 if (CAN_HAVE_LOCATION_P (c))
8648 SET_EXPR_LOCATION (c, expr_loc);
8649 if (c == boolean_true_node)
8651 warning_at (expr_loc, 0,
8652 "%<num_threads%> value must be positive");
8653 t = integer_one_node;
8656 check_no_duplicate_clause (list, OMP_CLAUSE_NUM_THREADS, "num_threads");
8658 c = build_omp_clause (num_threads_loc, OMP_CLAUSE_NUM_THREADS);
8659 OMP_CLAUSE_NUM_THREADS_EXPR (c) = t;
8660 OMP_CLAUSE_CHAIN (c) = list;
8671 c_parser_omp_clause_ordered (c_parser *parser, tree list)
8675 check_no_duplicate_clause (list, OMP_CLAUSE_ORDERED, "ordered");
8677 c = build_omp_clause (c_parser_peek_token (parser)->location,
8678 OMP_CLAUSE_ORDERED);
8679 OMP_CLAUSE_CHAIN (c) = list;
8685 private ( variable-list ) */
8688 c_parser_omp_clause_private (c_parser *parser, tree list)
8690 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_PRIVATE, list);
8694 reduction ( reduction-operator : variable-list )
8697 One of: + * - & ^ | && || */
8700 c_parser_omp_clause_reduction (c_parser *parser, tree list)
8702 location_t clause_loc = c_parser_peek_token (parser)->location;
8703 if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8705 enum tree_code code;
8707 switch (c_parser_peek_token (parser)->type)
8719 code = BIT_AND_EXPR;
8722 code = BIT_XOR_EXPR;
8725 code = BIT_IOR_EXPR;
8728 code = TRUTH_ANDIF_EXPR;
8731 code = TRUTH_ORIF_EXPR;
8734 c_parser_error (parser,
8735 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
8736 "%<^%>, %<|%>, %<&&%>, or %<||%>");
8737 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
8740 c_parser_consume_token (parser);
8741 if (c_parser_require (parser, CPP_COLON, "expected %<:%>"))
8745 nl = c_parser_omp_variable_list (parser, clause_loc,
8746 OMP_CLAUSE_REDUCTION, list);
8747 for (c = nl; c != list; c = OMP_CLAUSE_CHAIN (c))
8748 OMP_CLAUSE_REDUCTION_CODE (c) = code;
8752 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8758 schedule ( schedule-kind )
8759 schedule ( schedule-kind , expression )
8762 static | dynamic | guided | runtime | auto
8766 c_parser_omp_clause_schedule (c_parser *parser, tree list)
8769 location_t loc = c_parser_peek_token (parser)->location;
8771 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
8774 c = build_omp_clause (loc, OMP_CLAUSE_SCHEDULE);
8776 if (c_parser_next_token_is (parser, CPP_NAME))
8778 tree kind = c_parser_peek_token (parser)->value;
8779 const char *p = IDENTIFIER_POINTER (kind);
8784 if (strcmp ("dynamic", p) != 0)
8786 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
8790 if (strcmp ("guided", p) != 0)
8792 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
8796 if (strcmp ("runtime", p) != 0)
8798 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
8805 else if (c_parser_next_token_is_keyword (parser, RID_STATIC))
8806 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
8807 else if (c_parser_next_token_is_keyword (parser, RID_AUTO))
8808 OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
8812 c_parser_consume_token (parser);
8813 if (c_parser_next_token_is (parser, CPP_COMMA))
8816 c_parser_consume_token (parser);
8818 here = c_parser_peek_token (parser)->location;
8819 t = c_parser_expr_no_commas (parser, NULL).value;
8820 t = c_fully_fold (t, false, NULL);
8822 if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
8823 error_at (here, "schedule %<runtime%> does not take "
8824 "a %<chunk_size%> parameter");
8825 else if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_AUTO)
8827 "schedule %<auto%> does not take "
8828 "a %<chunk_size%> parameter");
8829 else if (TREE_CODE (TREE_TYPE (t)) == INTEGER_TYPE)
8830 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = t;
8832 c_parser_error (parser, "expected integer expression");
8834 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
8837 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
8838 "expected %<,%> or %<)%>");
8840 check_no_duplicate_clause (list, OMP_CLAUSE_SCHEDULE, "schedule");
8841 OMP_CLAUSE_CHAIN (c) = list;
8845 c_parser_error (parser, "invalid schedule kind");
8846 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, 0);
8851 shared ( variable-list ) */
8854 c_parser_omp_clause_shared (c_parser *parser, tree list)
8856 return c_parser_omp_var_list_parens (parser, OMP_CLAUSE_SHARED, list);
8863 c_parser_omp_clause_untied (c_parser *parser ATTRIBUTE_UNUSED, tree list)
8867 /* FIXME: Should we allow duplicates? */
8868 check_no_duplicate_clause (list, OMP_CLAUSE_UNTIED, "untied");
8870 c = build_omp_clause (c_parser_peek_token (parser)->location,
8872 OMP_CLAUSE_CHAIN (c) = list;
8877 /* Parse all OpenMP clauses. The set clauses allowed by the directive
8878 is a bitmask in MASK. Return the list of clauses found; the result
8879 of clause default goes in *pdefault. */
8882 c_parser_omp_all_clauses (c_parser *parser, unsigned int mask,
8885 tree clauses = NULL;
8888 while (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
8891 pragma_omp_clause c_kind;
8893 tree prev = clauses;
8895 if (!first && c_parser_next_token_is (parser, CPP_COMMA))
8896 c_parser_consume_token (parser);
8899 here = c_parser_peek_token (parser)->location;
8900 c_kind = c_parser_omp_clause_name (parser);
8904 case PRAGMA_OMP_CLAUSE_COLLAPSE:
8905 clauses = c_parser_omp_clause_collapse (parser, clauses);
8906 c_name = "collapse";
8908 case PRAGMA_OMP_CLAUSE_COPYIN:
8909 clauses = c_parser_omp_clause_copyin (parser, clauses);
8912 case PRAGMA_OMP_CLAUSE_COPYPRIVATE:
8913 clauses = c_parser_omp_clause_copyprivate (parser, clauses);
8914 c_name = "copyprivate";
8916 case PRAGMA_OMP_CLAUSE_DEFAULT:
8917 clauses = c_parser_omp_clause_default (parser, clauses);
8920 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE:
8921 clauses = c_parser_omp_clause_firstprivate (parser, clauses);
8922 c_name = "firstprivate";
8924 case PRAGMA_OMP_CLAUSE_IF:
8925 clauses = c_parser_omp_clause_if (parser, clauses);
8928 case PRAGMA_OMP_CLAUSE_LASTPRIVATE:
8929 clauses = c_parser_omp_clause_lastprivate (parser, clauses);
8930 c_name = "lastprivate";
8932 case PRAGMA_OMP_CLAUSE_NOWAIT:
8933 clauses = c_parser_omp_clause_nowait (parser, clauses);
8936 case PRAGMA_OMP_CLAUSE_NUM_THREADS:
8937 clauses = c_parser_omp_clause_num_threads (parser, clauses);
8938 c_name = "num_threads";
8940 case PRAGMA_OMP_CLAUSE_ORDERED:
8941 clauses = c_parser_omp_clause_ordered (parser, clauses);
8944 case PRAGMA_OMP_CLAUSE_PRIVATE:
8945 clauses = c_parser_omp_clause_private (parser, clauses);
8948 case PRAGMA_OMP_CLAUSE_REDUCTION:
8949 clauses = c_parser_omp_clause_reduction (parser, clauses);
8950 c_name = "reduction";
8952 case PRAGMA_OMP_CLAUSE_SCHEDULE:
8953 clauses = c_parser_omp_clause_schedule (parser, clauses);
8954 c_name = "schedule";
8956 case PRAGMA_OMP_CLAUSE_SHARED:
8957 clauses = c_parser_omp_clause_shared (parser, clauses);
8960 case PRAGMA_OMP_CLAUSE_UNTIED:
8961 clauses = c_parser_omp_clause_untied (parser, clauses);
8965 c_parser_error (parser, "expected %<#pragma omp%> clause");
8969 if (((mask >> c_kind) & 1) == 0 && !parser->error)
8971 /* Remove the invalid clause(s) from the list to avoid
8972 confusing the rest of the compiler. */
8974 error_at (here, "%qs is not valid for %qs", c_name, where);
8979 c_parser_skip_to_pragma_eol (parser);
8981 return c_finish_omp_clauses (clauses);
8988 In practice, we're also interested in adding the statement to an
8989 outer node. So it is convenient if we work around the fact that
8990 c_parser_statement calls add_stmt. */
8993 c_parser_omp_structured_block (c_parser *parser)
8995 tree stmt = push_stmt_list ();
8996 c_parser_statement (parser);
8997 return pop_stmt_list (stmt);
9001 # pragma omp atomic new-line
9005 x binop= expr | x++ | ++x | x-- | --x
9007 +, *, -, /, &, ^, |, <<, >>
9009 where x is an lvalue expression with scalar type.
9011 LOC is the location of the #pragma token. */
9014 c_parser_omp_atomic (location_t loc, c_parser *parser)
9018 enum tree_code code;
9019 struct c_expr rhs_expr;
9021 c_parser_skip_to_pragma_eol (parser);
9023 lhs = c_parser_unary_expression (parser).value;
9024 lhs = c_fully_fold (lhs, false, NULL);
9025 switch (TREE_CODE (lhs))
9029 c_parser_skip_to_end_of_block_or_statement (parser);
9032 case PREINCREMENT_EXPR:
9033 case POSTINCREMENT_EXPR:
9034 lhs = TREE_OPERAND (lhs, 0);
9036 rhs = integer_one_node;
9039 case PREDECREMENT_EXPR:
9040 case POSTDECREMENT_EXPR:
9041 lhs = TREE_OPERAND (lhs, 0);
9043 rhs = integer_one_node;
9047 if (TREE_CODE (TREE_OPERAND (lhs, 0)) == SAVE_EXPR
9048 && TREE_CODE (TREE_OPERAND (lhs, 1)) == COMPOUND_EXPR
9049 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs, 1), 0)) == MODIFY_EXPR
9050 && TREE_OPERAND (TREE_OPERAND (lhs, 1), 1) == TREE_OPERAND (lhs, 0)
9051 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
9052 (TREE_OPERAND (lhs, 1), 0), 0)))
9054 /* Undo effects of boolean_increment for post {in,de}crement. */
9055 lhs = TREE_OPERAND (TREE_OPERAND (lhs, 1), 0);
9058 if (TREE_CODE (lhs) == MODIFY_EXPR
9059 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs, 0))) == BOOLEAN_TYPE)
9061 /* Undo effects of boolean_increment. */
9062 if (integer_onep (TREE_OPERAND (lhs, 1)))
9064 /* This is pre or post increment. */
9065 rhs = TREE_OPERAND (lhs, 1);
9066 lhs = TREE_OPERAND (lhs, 0);
9070 if (TREE_CODE (TREE_OPERAND (lhs, 1)) == TRUTH_NOT_EXPR
9071 && TREE_OPERAND (lhs, 0)
9072 == TREE_OPERAND (TREE_OPERAND (lhs, 1), 0))
9074 /* This is pre or post decrement. */
9075 rhs = TREE_OPERAND (lhs, 1);
9076 lhs = TREE_OPERAND (lhs, 0);
9083 switch (c_parser_peek_token (parser)->type)
9089 code = TRUNC_DIV_EXPR;
9104 code = BIT_AND_EXPR;
9107 code = BIT_IOR_EXPR;
9110 code = BIT_XOR_EXPR;
9113 c_parser_error (parser,
9114 "invalid operator for %<#pragma omp atomic%>");
9118 /* Arrange to pass the location of the assignment operator to
9119 c_finish_omp_atomic. */
9120 loc = c_parser_peek_token (parser)->location;
9121 c_parser_consume_token (parser);
9123 location_t rhs_loc = c_parser_peek_token (parser)->location;
9124 rhs_expr = c_parser_expression (parser);
9125 rhs_expr = default_function_array_read_conversion (rhs_loc, rhs_expr);
9127 rhs = rhs_expr.value;
9128 rhs = c_fully_fold (rhs, false, NULL);
9131 stmt = c_finish_omp_atomic (loc, code, lhs, rhs);
9132 if (stmt != error_mark_node)
9134 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
9139 # pragma omp barrier new-line
9143 c_parser_omp_barrier (c_parser *parser)
9145 location_t loc = c_parser_peek_token (parser)->location;
9146 c_parser_consume_pragma (parser);
9147 c_parser_skip_to_pragma_eol (parser);
9149 c_finish_omp_barrier (loc);
9153 # pragma omp critical [(name)] new-line
9156 LOC is the location of the #pragma itself. */
9159 c_parser_omp_critical (location_t loc, c_parser *parser)
9161 tree stmt, name = NULL;
9163 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
9165 c_parser_consume_token (parser);
9166 if (c_parser_next_token_is (parser, CPP_NAME))
9168 name = c_parser_peek_token (parser)->value;
9169 c_parser_consume_token (parser);
9170 c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
9173 c_parser_error (parser, "expected identifier");
9175 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
9176 c_parser_error (parser, "expected %<(%> or end of line");
9177 c_parser_skip_to_pragma_eol (parser);
9179 stmt = c_parser_omp_structured_block (parser);
9180 return c_finish_omp_critical (loc, stmt, name);
9184 # pragma omp flush flush-vars[opt] new-line
9187 ( variable-list ) */
9190 c_parser_omp_flush (c_parser *parser)
9192 location_t loc = c_parser_peek_token (parser)->location;
9193 c_parser_consume_pragma (parser);
9194 if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
9195 c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
9196 else if (c_parser_next_token_is_not (parser, CPP_PRAGMA_EOL))
9197 c_parser_error (parser, "expected %<(%> or end of line");
9198 c_parser_skip_to_pragma_eol (parser);
9200 c_finish_omp_flush (loc);
9203 /* Parse the restricted form of the for statement allowed by OpenMP.
9204 The real trick here is to determine the loop control variable early
9205 so that we can push a new decl if necessary to make it private.
9206 LOC is the location of the OMP in "#pragma omp". */
9209 c_parser_omp_for_loop (location_t loc,
9210 c_parser *parser, tree clauses, tree *par_clauses)
9212 tree decl, cond, incr, save_break, save_cont, body, init, stmt, cl;
9213 tree declv, condv, incrv, initv, ret = NULL;
9214 bool fail = false, open_brace_parsed = false;
9215 int i, collapse = 1, nbraces = 0;
9217 VEC(tree,gc) *for_block = make_tree_vector ();
9219 for (cl = clauses; cl; cl = OMP_CLAUSE_CHAIN (cl))
9220 if (OMP_CLAUSE_CODE (cl) == OMP_CLAUSE_COLLAPSE)
9221 collapse = tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl), 0);
9223 gcc_assert (collapse >= 1);
9225 declv = make_tree_vec (collapse);
9226 initv = make_tree_vec (collapse);
9227 condv = make_tree_vec (collapse);
9228 incrv = make_tree_vec (collapse);
9230 if (!c_parser_next_token_is_keyword (parser, RID_FOR))
9232 c_parser_error (parser, "for statement expected");
9235 for_loc = c_parser_peek_token (parser)->location;
9236 c_parser_consume_token (parser);
9238 for (i = 0; i < collapse; i++)
9242 if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
9245 /* Parse the initialization declaration or expression. */
9246 if (c_parser_next_tokens_start_declaration (parser))
9249 VEC_safe_push (tree, gc, for_block, c_begin_compound_stmt (true));
9250 c_parser_declaration_or_fndef (parser, true, true, true, true, true, NULL);
9251 decl = check_for_loop_decls (for_loc, flag_isoc99);
9254 if (DECL_INITIAL (decl) == error_mark_node)
9255 decl = error_mark_node;
9258 else if (c_parser_next_token_is (parser, CPP_NAME)
9259 && c_parser_peek_2nd_token (parser)->type == CPP_EQ)
9261 struct c_expr decl_exp;
9262 struct c_expr init_exp;
9263 location_t init_loc;
9265 decl_exp = c_parser_postfix_expression (parser);
9266 decl = decl_exp.value;
9268 c_parser_require (parser, CPP_EQ, "expected %<=%>");
9270 init_loc = c_parser_peek_token (parser)->location;
9271 init_exp = c_parser_expr_no_commas (parser, NULL);
9272 init_exp = default_function_array_read_conversion (init_loc,
9274 init = build_modify_expr (init_loc, decl, decl_exp.original_type,
9275 NOP_EXPR, init_loc, init_exp.value,
9276 init_exp.original_type);
9277 init = c_process_expr_stmt (init_loc, init);
9279 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
9284 c_parser_error (parser,
9285 "expected iteration declaration or initialization");
9286 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
9292 /* Parse the loop condition. */
9294 if (c_parser_next_token_is_not (parser, CPP_SEMICOLON))
9296 location_t cond_loc = c_parser_peek_token (parser)->location;
9297 struct c_expr cond_expr = c_parser_binary_expression (parser, NULL);
9299 cond = cond_expr.value;
9300 cond = c_objc_common_truthvalue_conversion (cond_loc, cond);
9301 cond = c_fully_fold (cond, false, NULL);
9302 switch (cond_expr.original_code)
9310 /* Can't be cond = error_mark_node, because we want to preserve
9311 the location until c_finish_omp_for. */
9312 cond = build1 (NOP_EXPR, boolean_type_node, error_mark_node);
9315 protected_set_expr_location (cond, cond_loc);
9317 c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
9319 /* Parse the increment expression. */
9321 if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
9323 location_t incr_loc = c_parser_peek_token (parser)->location;
9325 incr = c_process_expr_stmt (incr_loc,
9326 c_parser_expression (parser).value);
9328 c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
9330 if (decl == NULL || decl == error_mark_node || init == error_mark_node)
9334 TREE_VEC_ELT (declv, i) = decl;
9335 TREE_VEC_ELT (initv, i) = init;
9336 TREE_VEC_ELT (condv, i) = cond;
9337 TREE_VEC_ELT (incrv, i) = incr;
9341 if (i == collapse - 1)
9344 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
9345 in between the collapsed for loops to be still considered perfectly
9346 nested. Hopefully the final version clarifies this.
9347 For now handle (multiple) {'s and empty statements. */
9350 if (c_parser_next_token_is_keyword (parser, RID_FOR))
9352 c_parser_consume_token (parser);
9355 else if (c_parser_next_token_is (parser, CPP_OPEN_BRACE))
9357 c_parser_consume_token (parser);
9361 && c_parser_next_token_is (parser, CPP_SEMICOLON))
9362 c_parser_consume_token (parser);
9365 c_parser_error (parser, "not enough perfectly nested loops");
9368 open_brace_parsed = true;
9378 nbraces += bracecount;
9381 save_break = c_break_label;
9382 c_break_label = size_one_node;
9383 save_cont = c_cont_label;
9384 c_cont_label = NULL_TREE;
9385 body = push_stmt_list ();
9387 if (open_brace_parsed)
9389 location_t here = c_parser_peek_token (parser)->location;
9390 stmt = c_begin_compound_stmt (true);
9391 c_parser_compound_statement_nostart (parser);
9392 add_stmt (c_end_compound_stmt (here, stmt, true));
9395 add_stmt (c_parser_c99_block_statement (parser));
9398 tree t = build1 (LABEL_EXPR, void_type_node, c_cont_label);
9399 SET_EXPR_LOCATION (t, loc);
9403 body = pop_stmt_list (body);
9404 c_break_label = save_break;
9405 c_cont_label = save_cont;
9409 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
9411 c_parser_consume_token (parser);
9414 else if (c_parser_next_token_is (parser, CPP_SEMICOLON))
9415 c_parser_consume_token (parser);
9418 c_parser_error (parser, "collapsed loops not perfectly nested");
9421 location_t here = c_parser_peek_token (parser)->location;
9422 stmt = c_begin_compound_stmt (true);
9424 c_parser_compound_statement_nostart (parser);
9425 body = c_end_compound_stmt (here, stmt, true);
9432 /* Only bother calling c_finish_omp_for if we haven't already generated
9433 an error from the initialization parsing. */
9436 stmt = c_finish_omp_for (loc, declv, initv, condv, incrv, body, NULL);
9439 if (par_clauses != NULL)
9442 for (c = par_clauses; *c ; )
9443 if (OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_FIRSTPRIVATE
9444 && OMP_CLAUSE_CODE (*c) != OMP_CLAUSE_LASTPRIVATE)
9445 c = &OMP_CLAUSE_CHAIN (*c);
9448 for (i = 0; i < collapse; i++)
9449 if (TREE_VEC_ELT (declv, i) == OMP_CLAUSE_DECL (*c))
9452 c = &OMP_CLAUSE_CHAIN (*c);
9453 else if (OMP_CLAUSE_CODE (*c) == OMP_CLAUSE_FIRSTPRIVATE)
9456 "iteration variable %qD should not be firstprivate",
9457 OMP_CLAUSE_DECL (*c));
9458 *c = OMP_CLAUSE_CHAIN (*c);
9462 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
9463 change it to shared (decl) in
9464 OMP_PARALLEL_CLAUSES. */
9465 tree l = build_omp_clause (OMP_CLAUSE_LOCATION (*c),
9466 OMP_CLAUSE_LASTPRIVATE);
9467 OMP_CLAUSE_DECL (l) = OMP_CLAUSE_DECL (*c);
9468 OMP_CLAUSE_CHAIN (l) = clauses;
9470 OMP_CLAUSE_SET_CODE (*c, OMP_CLAUSE_SHARED);
9474 OMP_FOR_CLAUSES (stmt) = clauses;
9479 while (!VEC_empty (tree, for_block))
9481 /* FIXME diagnostics: LOC below should be the actual location of
9482 this particular for block. We need to build a list of
9483 locations to go along with FOR_BLOCK. */
9484 stmt = c_end_compound_stmt (loc, VEC_pop (tree, for_block), true);
9487 release_tree_vector (for_block);
9492 #pragma omp for for-clause[optseq] new-line
9495 LOC is the location of the #pragma token.
9498 #define OMP_FOR_CLAUSE_MASK \
9499 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9500 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9501 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9502 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9503 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
9504 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
9505 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
9506 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9509 c_parser_omp_for (location_t loc, c_parser *parser)
9511 tree block, clauses, ret;
9513 clauses = c_parser_omp_all_clauses (parser, OMP_FOR_CLAUSE_MASK,
9516 block = c_begin_compound_stmt (true);
9517 ret = c_parser_omp_for_loop (loc, parser, clauses, NULL);
9518 block = c_end_compound_stmt (loc, block, true);
9525 # pragma omp master new-line
9528 LOC is the location of the #pragma token.
9532 c_parser_omp_master (location_t loc, c_parser *parser)
9534 c_parser_skip_to_pragma_eol (parser);
9535 return c_finish_omp_master (loc, c_parser_omp_structured_block (parser));
9539 # pragma omp ordered new-line
9542 LOC is the location of the #pragma itself.
9546 c_parser_omp_ordered (location_t loc, c_parser *parser)
9548 c_parser_skip_to_pragma_eol (parser);
9549 return c_finish_omp_ordered (loc, c_parser_omp_structured_block (parser));
9555 { section-sequence }
9558 section-directive[opt] structured-block
9559 section-sequence section-directive structured-block
9561 SECTIONS_LOC is the location of the #pragma omp sections. */
9564 c_parser_omp_sections_scope (location_t sections_loc, c_parser *parser)
9567 bool error_suppress = false;
9570 loc = c_parser_peek_token (parser)->location;
9571 if (!c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
9573 /* Avoid skipping until the end of the block. */
9574 parser->error = false;
9578 stmt = push_stmt_list ();
9580 if (c_parser_peek_token (parser)->pragma_kind != PRAGMA_OMP_SECTION)
9582 substmt = push_stmt_list ();
9586 c_parser_statement (parser);
9588 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
9590 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
9592 if (c_parser_next_token_is (parser, CPP_EOF))
9596 substmt = pop_stmt_list (substmt);
9597 substmt = build1 (OMP_SECTION, void_type_node, substmt);
9598 SET_EXPR_LOCATION (substmt, loc);
9604 if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
9606 if (c_parser_next_token_is (parser, CPP_EOF))
9609 loc = c_parser_peek_token (parser)->location;
9610 if (c_parser_peek_token (parser)->pragma_kind == PRAGMA_OMP_SECTION)
9612 c_parser_consume_pragma (parser);
9613 c_parser_skip_to_pragma_eol (parser);
9614 error_suppress = false;
9616 else if (!error_suppress)
9618 error_at (loc, "expected %<#pragma omp section%> or %<}%>");
9619 error_suppress = true;
9622 substmt = c_parser_omp_structured_block (parser);
9623 substmt = build1 (OMP_SECTION, void_type_node, substmt);
9624 SET_EXPR_LOCATION (substmt, loc);
9627 c_parser_skip_until_found (parser, CPP_CLOSE_BRACE,
9628 "expected %<#pragma omp section%> or %<}%>");
9630 substmt = pop_stmt_list (stmt);
9632 stmt = make_node (OMP_SECTIONS);
9633 SET_EXPR_LOCATION (stmt, sections_loc);
9634 TREE_TYPE (stmt) = void_type_node;
9635 OMP_SECTIONS_BODY (stmt) = substmt;
9637 return add_stmt (stmt);
9641 # pragma omp sections sections-clause[optseq] newline
9644 LOC is the location of the #pragma token.
9647 #define OMP_SECTIONS_CLAUSE_MASK \
9648 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9649 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9650 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9651 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9652 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9655 c_parser_omp_sections (location_t loc, c_parser *parser)
9657 tree block, clauses, ret;
9659 clauses = c_parser_omp_all_clauses (parser, OMP_SECTIONS_CLAUSE_MASK,
9660 "#pragma omp sections");
9662 block = c_begin_compound_stmt (true);
9663 ret = c_parser_omp_sections_scope (loc, parser);
9665 OMP_SECTIONS_CLAUSES (ret) = clauses;
9666 block = c_end_compound_stmt (loc, block, true);
9673 # pragma parallel parallel-clause new-line
9674 # pragma parallel for parallel-for-clause new-line
9675 # pragma parallel sections parallel-sections-clause new-line
9677 LOC is the location of the #pragma token.
9680 #define OMP_PARALLEL_CLAUSE_MASK \
9681 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9682 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9683 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9684 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9685 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
9686 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
9687 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9688 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
9691 c_parser_omp_parallel (location_t loc, c_parser *parser)
9693 enum pragma_kind p_kind = PRAGMA_OMP_PARALLEL;
9694 const char *p_name = "#pragma omp parallel";
9695 tree stmt, clauses, par_clause, ws_clause, block;
9696 unsigned int mask = OMP_PARALLEL_CLAUSE_MASK;
9698 if (c_parser_next_token_is_keyword (parser, RID_FOR))
9700 c_parser_consume_token (parser);
9701 p_kind = PRAGMA_OMP_PARALLEL_FOR;
9702 p_name = "#pragma omp parallel for";
9703 mask |= OMP_FOR_CLAUSE_MASK;
9704 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
9706 else if (c_parser_next_token_is (parser, CPP_NAME))
9708 const char *p = IDENTIFIER_POINTER (c_parser_peek_token (parser)->value);
9709 if (strcmp (p, "sections") == 0)
9711 c_parser_consume_token (parser);
9712 p_kind = PRAGMA_OMP_PARALLEL_SECTIONS;
9713 p_name = "#pragma omp parallel sections";
9714 mask |= OMP_SECTIONS_CLAUSE_MASK;
9715 mask &= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT);
9719 clauses = c_parser_omp_all_clauses (parser, mask, p_name);
9723 case PRAGMA_OMP_PARALLEL:
9724 block = c_begin_omp_parallel ();
9725 c_parser_statement (parser);
9726 stmt = c_finish_omp_parallel (loc, clauses, block);
9729 case PRAGMA_OMP_PARALLEL_FOR:
9730 block = c_begin_omp_parallel ();
9731 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
9732 c_parser_omp_for_loop (loc, parser, ws_clause, &par_clause);
9733 stmt = c_finish_omp_parallel (loc, par_clause, block);
9734 OMP_PARALLEL_COMBINED (stmt) = 1;
9737 case PRAGMA_OMP_PARALLEL_SECTIONS:
9738 block = c_begin_omp_parallel ();
9739 c_split_parallel_clauses (loc, clauses, &par_clause, &ws_clause);
9740 stmt = c_parser_omp_sections_scope (loc, parser);
9742 OMP_SECTIONS_CLAUSES (stmt) = ws_clause;
9743 stmt = c_finish_omp_parallel (loc, par_clause, block);
9744 OMP_PARALLEL_COMBINED (stmt) = 1;
9755 # pragma omp single single-clause[optseq] new-line
9758 LOC is the location of the #pragma.
9761 #define OMP_SINGLE_CLAUSE_MASK \
9762 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9763 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9764 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
9765 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9768 c_parser_omp_single (location_t loc, c_parser *parser)
9770 tree stmt = make_node (OMP_SINGLE);
9771 SET_EXPR_LOCATION (stmt, loc);
9772 TREE_TYPE (stmt) = void_type_node;
9774 OMP_SINGLE_CLAUSES (stmt)
9775 = c_parser_omp_all_clauses (parser, OMP_SINGLE_CLAUSE_MASK,
9776 "#pragma omp single");
9777 OMP_SINGLE_BODY (stmt) = c_parser_omp_structured_block (parser);
9779 return add_stmt (stmt);
9783 # pragma omp task task-clause[optseq] new-line
9785 LOC is the location of the #pragma.
9788 #define OMP_TASK_CLAUSE_MASK \
9789 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9790 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
9791 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9792 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9793 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9794 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
9797 c_parser_omp_task (location_t loc, c_parser *parser)
9799 tree clauses, block;
9801 clauses = c_parser_omp_all_clauses (parser, OMP_TASK_CLAUSE_MASK,
9802 "#pragma omp task");
9804 block = c_begin_omp_task ();
9805 c_parser_statement (parser);
9806 return c_finish_omp_task (loc, clauses, block);
9810 # pragma omp taskwait new-line
9814 c_parser_omp_taskwait (c_parser *parser)
9816 location_t loc = c_parser_peek_token (parser)->location;
9817 c_parser_consume_pragma (parser);
9818 c_parser_skip_to_pragma_eol (parser);
9820 c_finish_omp_taskwait (loc);
9823 /* Main entry point to parsing most OpenMP pragmas. */
9826 c_parser_omp_construct (c_parser *parser)
9828 enum pragma_kind p_kind;
9832 loc = c_parser_peek_token (parser)->location;
9833 p_kind = c_parser_peek_token (parser)->pragma_kind;
9834 c_parser_consume_pragma (parser);
9838 case PRAGMA_OMP_ATOMIC:
9839 c_parser_omp_atomic (loc, parser);
9841 case PRAGMA_OMP_CRITICAL:
9842 stmt = c_parser_omp_critical (loc, parser);
9844 case PRAGMA_OMP_FOR:
9845 stmt = c_parser_omp_for (loc, parser);
9847 case PRAGMA_OMP_MASTER:
9848 stmt = c_parser_omp_master (loc, parser);
9850 case PRAGMA_OMP_ORDERED:
9851 stmt = c_parser_omp_ordered (loc, parser);
9853 case PRAGMA_OMP_PARALLEL:
9854 stmt = c_parser_omp_parallel (loc, parser);
9856 case PRAGMA_OMP_SECTIONS:
9857 stmt = c_parser_omp_sections (loc, parser);
9859 case PRAGMA_OMP_SINGLE:
9860 stmt = c_parser_omp_single (loc, parser);
9862 case PRAGMA_OMP_TASK:
9863 stmt = c_parser_omp_task (loc, parser);
9870 gcc_assert (EXPR_LOCATION (stmt) != UNKNOWN_LOCATION);
9875 # pragma omp threadprivate (variable-list) */
9878 c_parser_omp_threadprivate (c_parser *parser)
9883 c_parser_consume_pragma (parser);
9884 loc = c_parser_peek_token (parser)->location;
9885 vars = c_parser_omp_var_list_parens (parser, OMP_CLAUSE_ERROR, NULL);
9887 /* Mark every variable in VARS to be assigned thread local storage. */
9888 for (t = vars; t; t = TREE_CHAIN (t))
9890 tree v = TREE_PURPOSE (t);
9892 /* FIXME diagnostics: Ideally we should keep individual
9893 locations for all the variables in the var list to make the
9894 following errors more precise. Perhaps
9895 c_parser_omp_var_list_parens() should construct a list of
9896 locations to go along with the var list. */
9898 /* If V had already been marked threadprivate, it doesn't matter
9899 whether it had been used prior to this point. */
9900 if (TREE_CODE (v) != VAR_DECL)
9901 error_at (loc, "%qD is not a variable", v);
9902 else if (TREE_USED (v) && !C_DECL_THREADPRIVATE_P (v))
9903 error_at (loc, "%qE declared %<threadprivate%> after first use", v);
9904 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
9905 error_at (loc, "automatic variable %qE cannot be %<threadprivate%>", v);
9906 else if (TREE_TYPE (v) == error_mark_node)
9908 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
9909 error_at (loc, "%<threadprivate%> %qE has incomplete type", v);
9912 if (! DECL_THREAD_LOCAL_P (v))
9914 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
9915 /* If rtl has been already set for this var, call
9916 make_decl_rtl once again, so that encode_section_info
9917 has a chance to look at the new decl flags. */
9918 if (DECL_RTL_SET_P (v))
9921 C_DECL_THREADPRIVATE_P (v) = 1;
9925 c_parser_skip_to_pragma_eol (parser);
9929 /* Parse a single source file. */
9934 /* Use local storage to begin. If the first token is a pragma, parse it.
9935 If it is #pragma GCC pch_preprocess, then this will load a PCH file
9936 which will cause garbage collection. */
9939 memset (&tparser, 0, sizeof tparser);
9940 the_parser = &tparser;
9942 if (c_parser_peek_token (&tparser)->pragma_kind == PRAGMA_GCC_PCH_PREPROCESS)
9943 c_parser_pragma_pch_preprocess (&tparser);
9945 the_parser = ggc_alloc_c_parser ();
9946 *the_parser = tparser;
9948 /* Initialize EH, if we've been told to do so. */
9949 if (flag_exceptions)
9950 using_eh_for_cleanups ();
9952 c_parser_translation_unit (the_parser);
9956 #include "gt-c-parser.h"