1 /* Parser for C and Objective-C.
2 Copyright (C) 1987-2013 Free Software Foundation, Inc.
4 Parser actions based on the old Bison parser; structure somewhat
5 influenced by and fragments based on the C++ parser.
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
25 Make sure all relevant comments, and all relevant code from all
26 actions, brought over from old parser. Verify exact correspondence
29 Add testcases covering every input symbol in every state in old and
32 Include full syntax for GNU C, including erroneous cases accepted
33 with error messages, in syntax productions in comments.
35 Make more diagnostics in the front end generally take an explicit
36 location rather than implicitly using input_location. */
40 #include "coretypes.h"
41 #include "tm.h" /* For rtl.h: needs enum reg_class. */
43 #include "langhooks.h"
47 #include "c-family/c-pragma.h"
51 #include "c-family/c-common.h"
52 #include "c-family/c-objc.h"
59 /* Initialization routine for this file. */
64 /* The only initialization required is of the reserved word
70 /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in
71 the c_token structure. */
72 gcc_assert (RID_MAX
<= 255);
79 mask
|= D_ASM
| D_EXT
;
83 if (!c_dialect_objc ())
84 mask
|= D_OBJC
| D_CXX_OBJC
;
86 ridpointers
= ggc_alloc_cleared_vec_tree ((int) RID_MAX
);
87 for (i
= 0; i
< num_c_common_reswords
; i
++)
89 /* If a keyword is disabled, do not enter it into the table
90 and so create a canonical spelling that isn't a keyword. */
91 if (c_common_reswords
[i
].disable
& mask
)
94 && (c_common_reswords
[i
].disable
& D_CXXWARN
))
96 id
= get_identifier (c_common_reswords
[i
].word
);
97 C_SET_RID_CODE (id
, RID_CXX_COMPAT_WARN
);
98 C_IS_RESERVED_WORD (id
) = 1;
103 id
= get_identifier (c_common_reswords
[i
].word
);
104 C_SET_RID_CODE (id
, c_common_reswords
[i
].rid
);
105 C_IS_RESERVED_WORD (id
) = 1;
106 ridpointers
[(int) c_common_reswords
[i
].rid
] = id
;
110 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
111 and the C parser. Unlike the C++ lexer, the parser structure
112 stores the lexer information instead of using a separate structure.
113 Identifiers are separated into ordinary identifiers, type names,
114 keywords and some other Objective-C types of identifiers, and some
115 look-ahead is maintained.
117 ??? It might be a good idea to lex the whole file up front (as for
118 C++). It would then be possible to share more of the C and C++
119 lexer code, if desired. */
121 /* The following local token type is used. */
124 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
126 /* More information about the type of a CPP_NAME token. */
127 typedef enum c_id_kind
{
128 /* An ordinary identifier. */
130 /* An identifier declared as a typedef name. */
132 /* An identifier declared as an Objective-C class name. */
134 /* An address space identifier. */
136 /* Not an identifier. */
140 /* A single C token after string literal concatenation and conversion
141 of preprocessing tokens to tokens. */
142 typedef struct GTY (()) c_token
{
143 /* The kind of token. */
144 ENUM_BITFIELD (cpp_ttype
) type
: 8;
145 /* If this token is a CPP_NAME, this value indicates whether also
146 declared as some kind of type. Otherwise, it is C_ID_NONE. */
147 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
148 /* If this token is a keyword, this value indicates which keyword.
149 Otherwise, this value is RID_MAX. */
150 ENUM_BITFIELD (rid
) keyword
: 8;
151 /* If this token is a CPP_PRAGMA, this indicates the pragma that
152 was seen. Otherwise it is PRAGMA_NONE. */
153 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 8;
154 /* The location at which this token was found. */
156 /* The value associated with this token, if any. */
160 /* A parser structure recording information about the state and
161 context of parsing. Includes lexer information with up to two
162 tokens of look-ahead; more are not needed for C. */
163 typedef struct GTY(()) c_parser
{
164 /* The look-ahead tokens. */
166 /* How many look-ahead tokens are available (0, 1 or 2). */
168 /* True if a syntax error is being recovered from; false otherwise.
169 c_parser_error sets this flag. It should clear this flag when
170 enough tokens have been consumed to recover from the error. */
171 BOOL_BITFIELD error
: 1;
172 /* True if we're processing a pragma, and shouldn't automatically
173 consume CPP_PRAGMA_EOL. */
174 BOOL_BITFIELD in_pragma
: 1;
175 /* True if we're parsing the outermost block of an if statement. */
176 BOOL_BITFIELD in_if_block
: 1;
177 /* True if we want to lex an untranslated string. */
178 BOOL_BITFIELD lex_untranslated_string
: 1;
180 /* Objective-C specific parser/lexer information. */
182 /* True if we are in a context where the Objective-C "PQ" keywords
183 are considered keywords. */
184 BOOL_BITFIELD objc_pq_context
: 1;
185 /* True if we are parsing a (potential) Objective-C foreach
186 statement. This is set to true after we parsed 'for (' and while
187 we wait for 'in' or ';' to decide if it's a standard C for loop or an
188 Objective-C foreach loop. */
189 BOOL_BITFIELD objc_could_be_foreach_context
: 1;
190 /* The following flag is needed to contextualize Objective-C lexical
191 analysis. In some cases (e.g., 'int NSObject;'), it is
192 undesirable to bind an identifier to an Objective-C class, even
193 if a class with that name exists. */
194 BOOL_BITFIELD objc_need_raw_identifier
: 1;
195 /* Nonzero if we're processing a __transaction statement. The value
196 is 1 | TM_STMT_ATTR_*. */
197 unsigned int in_transaction
: 4;
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
)
659 if (c_dialect_objc ())
668 /* Return true if TOKEN can start declaration specifiers or a static
669 assertion, false otherwise. */
671 c_token_starts_declaration (c_token
*token
)
673 if (c_token_starts_declspecs (token
)
674 || token
->keyword
== RID_STATIC_ASSERT
)
680 /* Return true if the next token from PARSER can start declaration
681 specifiers, false otherwise. */
683 c_parser_next_token_starts_declspecs (c_parser
*parser
)
685 c_token
*token
= c_parser_peek_token (parser
);
687 /* In Objective-C, a classname normally starts a declspecs unless it
688 is immediately followed by a dot. In that case, it is the
689 Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
690 setter/getter on the class. c_token_starts_declspecs() can't
691 differentiate between the two cases because it only checks the
692 current token, so we have a special check here. */
693 if (c_dialect_objc ()
694 && token
->type
== CPP_NAME
695 && token
->id_kind
== C_ID_CLASSNAME
696 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
699 return c_token_starts_declspecs (token
);
702 /* Return true if the next tokens from PARSER can start declaration
703 specifiers or a static assertion, false otherwise. */
705 c_parser_next_tokens_start_declaration (c_parser
*parser
)
707 c_token
*token
= c_parser_peek_token (parser
);
710 if (c_dialect_objc ()
711 && token
->type
== CPP_NAME
712 && token
->id_kind
== C_ID_CLASSNAME
713 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
716 /* Labels do not start declarations. */
717 if (token
->type
== CPP_NAME
718 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
721 if (c_token_starts_declaration (token
))
724 if (c_parser_next_tokens_start_typename (parser
, cla_nonabstract_decl
))
730 /* Consume the next token from PARSER. */
733 c_parser_consume_token (c_parser
*parser
)
735 gcc_assert (parser
->tokens_avail
>= 1);
736 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
737 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
738 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
739 if (parser
->tokens_avail
== 2)
740 parser
->tokens
[0] = parser
->tokens
[1];
741 parser
->tokens_avail
--;
744 /* Expect the current token to be a #pragma. Consume it and remember
745 that we've begun parsing a pragma. */
748 c_parser_consume_pragma (c_parser
*parser
)
750 gcc_assert (!parser
->in_pragma
);
751 gcc_assert (parser
->tokens_avail
>= 1);
752 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
753 if (parser
->tokens_avail
== 2)
754 parser
->tokens
[0] = parser
->tokens
[1];
755 parser
->tokens_avail
--;
756 parser
->in_pragma
= true;
759 /* Update the globals input_location and in_system_header from
762 c_parser_set_source_position_from_token (c_token
*token
)
764 if (token
->type
!= CPP_EOF
)
766 input_location
= token
->location
;
770 /* Issue a diagnostic of the form
771 FILE:LINE: MESSAGE before TOKEN
772 where TOKEN is the next token in the input stream of PARSER.
773 MESSAGE (specified by the caller) is usually of the form "expected
776 Do not issue a diagnostic if still recovering from an error.
778 ??? This is taken from the C++ parser, but building up messages in
779 this way is not i18n-friendly and some other approach should be
783 c_parser_error (c_parser
*parser
, const char *gmsgid
)
785 c_token
*token
= c_parser_peek_token (parser
);
788 parser
->error
= true;
791 /* This diagnostic makes more sense if it is tagged to the line of
792 the token we just peeked at. */
793 c_parser_set_source_position_from_token (token
);
794 c_parse_error (gmsgid
,
795 /* Because c_parse_error does not understand
796 CPP_KEYWORD, keywords are treated like
798 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
799 /* ??? The C parser does not save the cpp flags of a
800 token, we need to pass 0 here and we will not get
801 the source spelling of some tokens but rather the
802 canonical spelling. */
803 token
->value
, /*flags=*/0);
806 /* If the next token is of the indicated TYPE, consume it. Otherwise,
807 issue the error MSGID. If MSGID is NULL then a message has already
808 been produced and no message will be produced this time. Returns
809 true if found, false otherwise. */
812 c_parser_require (c_parser
*parser
,
816 if (c_parser_next_token_is (parser
, type
))
818 c_parser_consume_token (parser
);
823 c_parser_error (parser
, msgid
);
828 /* If the next token is the indicated keyword, consume it. Otherwise,
829 issue the error MSGID. Returns true if found, false otherwise. */
832 c_parser_require_keyword (c_parser
*parser
,
836 if (c_parser_next_token_is_keyword (parser
, keyword
))
838 c_parser_consume_token (parser
);
843 c_parser_error (parser
, msgid
);
848 /* Like c_parser_require, except that tokens will be skipped until the
849 desired token is found. An error message is still produced if the
850 next token is not as expected. If MSGID is NULL then a message has
851 already been produced and no message will be produced this
855 c_parser_skip_until_found (c_parser
*parser
,
859 unsigned nesting_depth
= 0;
861 if (c_parser_require (parser
, type
, msgid
))
864 /* Skip tokens until the desired token is found. */
867 /* Peek at the next token. */
868 c_token
*token
= c_parser_peek_token (parser
);
869 /* If we've reached the token we want, consume it and stop. */
870 if (token
->type
== type
&& !nesting_depth
)
872 c_parser_consume_token (parser
);
876 /* If we've run out of tokens, stop. */
877 if (token
->type
== CPP_EOF
)
879 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
881 if (token
->type
== CPP_OPEN_BRACE
882 || token
->type
== CPP_OPEN_PAREN
883 || token
->type
== CPP_OPEN_SQUARE
)
885 else if (token
->type
== CPP_CLOSE_BRACE
886 || token
->type
== CPP_CLOSE_PAREN
887 || token
->type
== CPP_CLOSE_SQUARE
)
889 if (nesting_depth
-- == 0)
892 /* Consume this token. */
893 c_parser_consume_token (parser
);
895 parser
->error
= false;
898 /* Skip tokens until the end of a parameter is found, but do not
899 consume the comma, semicolon or closing delimiter. */
902 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
904 unsigned nesting_depth
= 0;
908 c_token
*token
= c_parser_peek_token (parser
);
909 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
912 /* If we've run out of tokens, stop. */
913 if (token
->type
== CPP_EOF
)
915 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
917 if (token
->type
== CPP_OPEN_BRACE
918 || token
->type
== CPP_OPEN_PAREN
919 || token
->type
== CPP_OPEN_SQUARE
)
921 else if (token
->type
== CPP_CLOSE_BRACE
922 || token
->type
== CPP_CLOSE_PAREN
923 || token
->type
== CPP_CLOSE_SQUARE
)
925 if (nesting_depth
-- == 0)
928 /* Consume this token. */
929 c_parser_consume_token (parser
);
931 parser
->error
= false;
934 /* Expect to be at the end of the pragma directive and consume an
935 end of line marker. */
938 c_parser_skip_to_pragma_eol (c_parser
*parser
)
940 gcc_assert (parser
->in_pragma
);
941 parser
->in_pragma
= false;
943 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
946 c_token
*token
= c_parser_peek_token (parser
);
947 if (token
->type
== CPP_EOF
)
949 if (token
->type
== CPP_PRAGMA_EOL
)
951 c_parser_consume_token (parser
);
954 c_parser_consume_token (parser
);
957 parser
->error
= false;
960 /* Skip tokens until we have consumed an entire block, or until we
961 have consumed a non-nested ';'. */
964 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
966 unsigned nesting_depth
= 0;
967 bool save_error
= parser
->error
;
973 /* Peek at the next token. */
974 token
= c_parser_peek_token (parser
);
982 if (parser
->in_pragma
)
987 /* If the next token is a ';', we have reached the
988 end of the statement. */
991 /* Consume the ';'. */
992 c_parser_consume_token (parser
);
997 case CPP_CLOSE_BRACE
:
998 /* If the next token is a non-nested '}', then we have
999 reached the end of the current block. */
1000 if (nesting_depth
== 0 || --nesting_depth
== 0)
1002 c_parser_consume_token (parser
);
1007 case CPP_OPEN_BRACE
:
1008 /* If it the next token is a '{', then we are entering a new
1009 block. Consume the entire block. */
1014 /* If we see a pragma, consume the whole thing at once. We
1015 have some safeguards against consuming pragmas willy-nilly.
1016 Normally, we'd expect to be here with parser->error set,
1017 which disables these safeguards. But it's possible to get
1018 here for secondary error recovery, after parser->error has
1020 c_parser_consume_pragma (parser
);
1021 c_parser_skip_to_pragma_eol (parser
);
1022 parser
->error
= save_error
;
1029 c_parser_consume_token (parser
);
1033 parser
->error
= false;
1036 /* CPP's options (initialized by c-opts.c). */
1037 extern cpp_options
*cpp_opts
;
1039 /* Save the warning flags which are controlled by __extension__. */
1042 disable_extension_diagnostics (void)
1045 | (warn_pointer_arith
<< 1)
1046 | (warn_traditional
<< 2)
1048 | (warn_long_long
<< 4)
1049 | (warn_cxx_compat
<< 5)
1050 | (warn_overlength_strings
<< 6));
1051 cpp_opts
->cpp_pedantic
= pedantic
= 0;
1052 warn_pointer_arith
= 0;
1053 cpp_opts
->cpp_warn_traditional
= warn_traditional
= 0;
1055 cpp_opts
->cpp_warn_long_long
= warn_long_long
= 0;
1056 warn_cxx_compat
= 0;
1057 warn_overlength_strings
= 0;
1061 /* Restore the warning flags which are controlled by __extension__.
1062 FLAGS is the return value from disable_extension_diagnostics. */
1065 restore_extension_diagnostics (int flags
)
1067 cpp_opts
->cpp_pedantic
= pedantic
= flags
& 1;
1068 warn_pointer_arith
= (flags
>> 1) & 1;
1069 cpp_opts
->cpp_warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
1070 flag_iso
= (flags
>> 3) & 1;
1071 cpp_opts
->cpp_warn_long_long
= warn_long_long
= (flags
>> 4) & 1;
1072 warn_cxx_compat
= (flags
>> 5) & 1;
1073 warn_overlength_strings
= (flags
>> 6) & 1;
1076 /* Possibly kinds of declarator to parse. */
1077 typedef enum c_dtr_syn
{
1078 /* A normal declarator with an identifier. */
1080 /* An abstract declarator (maybe empty). */
1082 /* A parameter declarator: may be either, but after a type name does
1083 not redeclare a typedef name as an identifier if it can
1084 alternatively be interpreted as a typedef name; see DR#009,
1085 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
1086 following DR#249. For example, given a typedef T, "int T" and
1087 "int *T" are valid parameter declarations redeclaring T, while
1088 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
1089 abstract declarators rather than involving redundant parentheses;
1090 the same applies with attributes inside the parentheses before
1095 /* The binary operation precedence levels, where 0 is a dummy lowest level
1096 used for the bottom of the stack. */
1097 enum c_parser_prec
{
1112 static void c_parser_external_declaration (c_parser
*);
1113 static void c_parser_asm_definition (c_parser
*);
1114 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool,
1115 bool, bool, tree
*);
1116 static void c_parser_static_assert_declaration_no_semi (c_parser
*);
1117 static void c_parser_static_assert_declaration (c_parser
*);
1118 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
1119 bool, enum c_lookahead_kind
);
1120 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
1121 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
1122 static tree
c_parser_struct_declaration (c_parser
*);
1123 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
1124 static tree
c_parser_alignas_specifier (c_parser
*);
1125 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
1127 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
1129 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
1131 struct c_declarator
*);
1132 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
1133 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
,
1135 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
1136 static tree
c_parser_simple_asm_expr (c_parser
*);
1137 static tree
c_parser_attributes (c_parser
*);
1138 static struct c_type_name
*c_parser_type_name (c_parser
*);
1139 static struct c_expr
c_parser_initializer (c_parser
*);
1140 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1141 static void c_parser_initelt (c_parser
*, struct obstack
*);
1142 static void c_parser_initval (c_parser
*, struct c_expr
*,
1144 static tree
c_parser_compound_statement (c_parser
*);
1145 static void c_parser_compound_statement_nostart (c_parser
*);
1146 static void c_parser_label (c_parser
*);
1147 static void c_parser_statement (c_parser
*);
1148 static void c_parser_statement_after_labels (c_parser
*);
1149 static void c_parser_if_statement (c_parser
*);
1150 static void c_parser_switch_statement (c_parser
*);
1151 static void c_parser_while_statement (c_parser
*);
1152 static void c_parser_do_statement (c_parser
*);
1153 static void c_parser_for_statement (c_parser
*);
1154 static tree
c_parser_asm_statement (c_parser
*);
1155 static tree
c_parser_asm_operands (c_parser
*);
1156 static tree
c_parser_asm_goto_operands (c_parser
*);
1157 static tree
c_parser_asm_clobbers (c_parser
*);
1158 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1159 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1161 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*,
1162 enum c_parser_prec
);
1163 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1164 static struct c_expr
c_parser_unary_expression (c_parser
*);
1165 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1166 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1167 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1168 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1169 struct c_type_name
*,
1171 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1174 static tree
c_parser_transaction (c_parser
*, enum rid
);
1175 static struct c_expr
c_parser_transaction_expression (c_parser
*, enum rid
);
1176 static tree
c_parser_transaction_cancel (c_parser
*);
1177 static struct c_expr
c_parser_expression (c_parser
*);
1178 static struct c_expr
c_parser_expression_conv (c_parser
*);
1179 static vec
<tree
, va_gc
> *c_parser_expr_list (c_parser
*, bool, bool,
1180 vec
<tree
, va_gc
> **, location_t
*,
1182 static void c_parser_omp_construct (c_parser
*);
1183 static void c_parser_omp_threadprivate (c_parser
*);
1184 static void c_parser_omp_barrier (c_parser
*);
1185 static void c_parser_omp_flush (c_parser
*);
1186 static void c_parser_omp_taskwait (c_parser
*);
1187 static void c_parser_omp_taskyield (c_parser
*);
1189 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1190 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1192 /* These Objective-C parser functions are only ever called when
1193 compiling Objective-C. */
1194 static void c_parser_objc_class_definition (c_parser
*, tree
);
1195 static void c_parser_objc_class_instance_variables (c_parser
*);
1196 static void c_parser_objc_class_declaration (c_parser
*);
1197 static void c_parser_objc_alias_declaration (c_parser
*);
1198 static void c_parser_objc_protocol_definition (c_parser
*, tree
);
1199 static bool c_parser_objc_method_type (c_parser
*);
1200 static void c_parser_objc_method_definition (c_parser
*);
1201 static void c_parser_objc_methodprotolist (c_parser
*);
1202 static void c_parser_objc_methodproto (c_parser
*);
1203 static tree
c_parser_objc_method_decl (c_parser
*, bool, tree
*, tree
*);
1204 static tree
c_parser_objc_type_name (c_parser
*);
1205 static tree
c_parser_objc_protocol_refs (c_parser
*);
1206 static void c_parser_objc_try_catch_finally_statement (c_parser
*);
1207 static void c_parser_objc_synchronized_statement (c_parser
*);
1208 static tree
c_parser_objc_selector (c_parser
*);
1209 static tree
c_parser_objc_selector_arg (c_parser
*);
1210 static tree
c_parser_objc_receiver (c_parser
*);
1211 static tree
c_parser_objc_message_args (c_parser
*);
1212 static tree
c_parser_objc_keywordexpr (c_parser
*);
1213 static void c_parser_objc_at_property_declaration (c_parser
*);
1214 static void c_parser_objc_at_synthesize_declaration (c_parser
*);
1215 static void c_parser_objc_at_dynamic_declaration (c_parser
*);
1216 static bool c_parser_objc_diagnose_bad_element_prefix
1217 (c_parser
*, struct c_declspecs
*);
1219 /* Parse a translation unit (C90 6.7, C99 6.9).
1222 external-declarations
1224 external-declarations:
1225 external-declaration
1226 external-declarations external-declaration
1235 c_parser_translation_unit (c_parser
*parser
)
1237 if (c_parser_next_token_is (parser
, CPP_EOF
))
1239 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
1240 "ISO C forbids an empty translation unit");
1244 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1245 mark_valid_location_for_stdc_pragma (false);
1249 c_parser_external_declaration (parser
);
1250 obstack_free (&parser_obstack
, obstack_position
);
1252 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1256 /* Parse an external declaration (C90 6.7, C99 6.9).
1258 external-declaration:
1264 external-declaration:
1267 __extension__ external-declaration
1271 external-declaration:
1272 objc-class-definition
1273 objc-class-declaration
1274 objc-alias-declaration
1275 objc-protocol-definition
1276 objc-method-definition
1281 c_parser_external_declaration (c_parser
*parser
)
1284 switch (c_parser_peek_token (parser
)->type
)
1287 switch (c_parser_peek_token (parser
)->keyword
)
1290 ext
= disable_extension_diagnostics ();
1291 c_parser_consume_token (parser
);
1292 c_parser_external_declaration (parser
);
1293 restore_extension_diagnostics (ext
);
1296 c_parser_asm_definition (parser
);
1298 case RID_AT_INTERFACE
:
1299 case RID_AT_IMPLEMENTATION
:
1300 gcc_assert (c_dialect_objc ());
1301 c_parser_objc_class_definition (parser
, NULL_TREE
);
1304 gcc_assert (c_dialect_objc ());
1305 c_parser_objc_class_declaration (parser
);
1308 gcc_assert (c_dialect_objc ());
1309 c_parser_objc_alias_declaration (parser
);
1311 case RID_AT_PROTOCOL
:
1312 gcc_assert (c_dialect_objc ());
1313 c_parser_objc_protocol_definition (parser
, NULL_TREE
);
1315 case RID_AT_PROPERTY
:
1316 gcc_assert (c_dialect_objc ());
1317 c_parser_objc_at_property_declaration (parser
);
1319 case RID_AT_SYNTHESIZE
:
1320 gcc_assert (c_dialect_objc ());
1321 c_parser_objc_at_synthesize_declaration (parser
);
1323 case RID_AT_DYNAMIC
:
1324 gcc_assert (c_dialect_objc ());
1325 c_parser_objc_at_dynamic_declaration (parser
);
1328 gcc_assert (c_dialect_objc ());
1329 c_parser_consume_token (parser
);
1330 objc_finish_implementation ();
1337 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
1338 "ISO C does not allow extra %<;%> outside of a function");
1339 c_parser_consume_token (parser
);
1342 mark_valid_location_for_stdc_pragma (true);
1343 c_parser_pragma (parser
, pragma_external
);
1344 mark_valid_location_for_stdc_pragma (false);
1348 if (c_dialect_objc ())
1350 c_parser_objc_method_definition (parser
);
1353 /* Else fall through, and yield a syntax error trying to parse
1354 as a declaration or function definition. */
1357 /* A declaration or a function definition (or, in Objective-C,
1358 an @interface or @protocol with prefix attributes). We can
1359 only tell which after parsing the declaration specifiers, if
1360 any, and the first declarator. */
1361 c_parser_declaration_or_fndef (parser
, true, true, true, false, true, NULL
);
1366 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1367 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1368 accepted; otherwise (old-style parameter declarations) only other
1369 declarations are accepted. If STATIC_ASSERT_OK is true, a static
1370 assertion is accepted; otherwise (old-style parameter declarations)
1371 it is not. If NESTED is true, we are inside a function or parsing
1372 old-style parameter declarations; any functions encountered are
1373 nested functions and declaration specifiers are required; otherwise
1374 we are at top level and functions are normal functions and
1375 declaration specifiers may be optional. If EMPTY_OK is true, empty
1376 declarations are OK (subject to all other constraints); otherwise
1377 (old-style parameter declarations) they are diagnosed. If
1378 START_ATTR_OK is true, the declaration specifiers may start with
1379 attributes; otherwise they may not.
1380 OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed
1381 declaration when parsing an Objective-C foreach statement.
1384 declaration-specifiers init-declarator-list[opt] ;
1385 static_assert-declaration
1387 function-definition:
1388 declaration-specifiers[opt] declarator declaration-list[opt]
1393 declaration-list declaration
1395 init-declarator-list:
1397 init-declarator-list , init-declarator
1400 declarator simple-asm-expr[opt] attributes[opt]
1401 declarator simple-asm-expr[opt] attributes[opt] = initializer
1405 nested-function-definition:
1406 declaration-specifiers declarator declaration-list[opt]
1410 attributes objc-class-definition
1411 attributes objc-category-definition
1412 attributes objc-protocol-definition
1414 The simple-asm-expr and attributes are GNU extensions.
1416 This function does not handle __extension__; that is handled in its
1417 callers. ??? Following the old parser, __extension__ may start
1418 external declarations, declarations in functions and declarations
1419 at the start of "for" loops, but not old-style parameter
1422 C99 requires declaration specifiers in a function definition; the
1423 absence is diagnosed through the diagnosis of implicit int. In GNU
1424 C we also allow but diagnose declarations without declaration
1425 specifiers, but only at top level (elsewhere they conflict with
1428 In Objective-C, declarations of the looping variable in a foreach
1429 statement are exceptionally terminated by 'in' (for example, 'for
1430 (NSObject *object in array) { ... }').
1435 threadprivate-directive */
1438 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
,
1439 bool static_assert_ok
, bool empty_ok
,
1440 bool nested
, bool start_attr_ok
,
1441 tree
*objc_foreach_object_declaration
)
1443 struct c_declspecs
*specs
;
1445 tree all_prefix_attrs
;
1446 bool diagnosed_no_specs
= false;
1447 location_t here
= c_parser_peek_token (parser
)->location
;
1449 if (static_assert_ok
1450 && c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
1452 c_parser_static_assert_declaration (parser
);
1455 specs
= build_null_declspecs ();
1457 /* Try to detect an unknown type name when we have "A B" or "A *B". */
1458 if (c_parser_peek_token (parser
)->type
== CPP_NAME
1459 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
1460 && (c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
1461 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
1462 && (!nested
|| !lookup_name (c_parser_peek_token (parser
)->value
)))
1464 error_at (here
, "unknown type name %qE",
1465 c_parser_peek_token (parser
)->value
);
1467 /* Parse declspecs normally to get a correct pointer type, but avoid
1468 a further "fails to be a type name" error. Refuse nested functions
1469 since it is not how the user likely wants us to recover. */
1470 c_parser_peek_token (parser
)->type
= CPP_KEYWORD
;
1471 c_parser_peek_token (parser
)->keyword
= RID_VOID
;
1472 c_parser_peek_token (parser
)->value
= error_mark_node
;
1476 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
, cla_nonabstract_decl
);
1479 c_parser_skip_to_end_of_block_or_statement (parser
);
1482 if (nested
&& !specs
->declspecs_seen_p
)
1484 c_parser_error (parser
, "expected declaration specifiers");
1485 c_parser_skip_to_end_of_block_or_statement (parser
);
1488 finish_declspecs (specs
);
1489 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1495 shadow_tag_warned (specs
, 1);
1496 pedwarn (here
, 0, "empty declaration");
1498 c_parser_consume_token (parser
);
1502 /* Provide better error recovery. Note that a type name here is usually
1503 better diagnosed as a redeclaration. */
1505 && specs
->typespec_kind
== ctsk_tagdef
1506 && c_parser_next_token_starts_declspecs (parser
)
1507 && !c_parser_next_token_is (parser
, CPP_NAME
))
1509 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
1510 parser
->error
= false;
1511 shadow_tag_warned (specs
, 1);
1514 else if (c_dialect_objc ())
1516 /* Prefix attributes are an error on method decls. */
1517 switch (c_parser_peek_token (parser
)->type
)
1521 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1525 warning_at (c_parser_peek_token (parser
)->location
,
1527 "prefix attributes are ignored for methods");
1528 specs
->attrs
= NULL_TREE
;
1531 c_parser_objc_method_definition (parser
);
1533 c_parser_objc_methodproto (parser
);
1539 /* This is where we parse 'attributes @interface ...',
1540 'attributes @implementation ...', 'attributes @protocol ...'
1541 (where attributes could be, for example, __attribute__
1544 switch (c_parser_peek_token (parser
)->keyword
)
1546 case RID_AT_INTERFACE
:
1548 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1550 c_parser_objc_class_definition (parser
, specs
->attrs
);
1554 case RID_AT_IMPLEMENTATION
:
1556 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1560 warning_at (c_parser_peek_token (parser
)->location
,
1562 "prefix attributes are ignored for implementations");
1563 specs
->attrs
= NULL_TREE
;
1565 c_parser_objc_class_definition (parser
, NULL_TREE
);
1569 case RID_AT_PROTOCOL
:
1571 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1573 c_parser_objc_protocol_definition (parser
, specs
->attrs
);
1580 case RID_AT_PROPERTY
:
1583 c_parser_error (parser
, "unexpected attribute");
1584 specs
->attrs
= NULL
;
1592 pending_xref_error ();
1593 prefix_attrs
= specs
->attrs
;
1594 all_prefix_attrs
= prefix_attrs
;
1595 specs
->attrs
= NULL_TREE
;
1598 struct c_declarator
*declarator
;
1602 /* Declaring either one or more declarators (in which case we
1603 should diagnose if there were no declaration specifiers) or a
1604 function definition (in which case the diagnostic for
1605 implicit int suffices). */
1606 declarator
= c_parser_declarator (parser
,
1607 specs
->typespec_kind
!= ctsk_none
,
1608 C_DTR_NORMAL
, &dummy
);
1609 if (declarator
== NULL
)
1611 c_parser_skip_to_end_of_block_or_statement (parser
);
1614 if (c_parser_next_token_is (parser
, CPP_EQ
)
1615 || c_parser_next_token_is (parser
, CPP_COMMA
)
1616 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1617 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1618 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
)
1619 || c_parser_next_token_is_keyword (parser
, RID_IN
))
1621 tree asm_name
= NULL_TREE
;
1622 tree postfix_attrs
= NULL_TREE
;
1623 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1625 diagnosed_no_specs
= true;
1626 pedwarn (here
, 0, "data definition has no type or storage class");
1628 /* Having seen a data definition, there cannot now be a
1629 function definition. */
1631 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1632 asm_name
= c_parser_simple_asm_expr (parser
);
1633 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1634 postfix_attrs
= c_parser_attributes (parser
);
1635 if (c_parser_next_token_is (parser
, CPP_EQ
))
1639 location_t init_loc
;
1640 c_parser_consume_token (parser
);
1641 /* The declaration of the variable is in effect while
1642 its initializer is parsed. */
1643 d
= start_decl (declarator
, specs
, true,
1644 chainon (postfix_attrs
, all_prefix_attrs
));
1646 d
= error_mark_node
;
1647 start_init (d
, asm_name
, global_bindings_p ());
1648 init_loc
= c_parser_peek_token (parser
)->location
;
1649 init
= c_parser_initializer (parser
);
1651 if (d
!= error_mark_node
)
1653 maybe_warn_string_init (TREE_TYPE (d
), init
);
1654 finish_decl (d
, init_loc
, init
.value
,
1655 init
.original_type
, asm_name
);
1660 tree d
= start_decl (declarator
, specs
, false,
1661 chainon (postfix_attrs
,
1664 finish_decl (d
, UNKNOWN_LOCATION
, NULL_TREE
,
1665 NULL_TREE
, asm_name
);
1667 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1670 *objc_foreach_object_declaration
= d
;
1672 *objc_foreach_object_declaration
= error_mark_node
;
1675 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1677 c_parser_consume_token (parser
);
1678 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1679 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1682 all_prefix_attrs
= prefix_attrs
;
1685 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1687 c_parser_consume_token (parser
);
1690 else if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1692 /* This can only happen in Objective-C: we found the
1693 'in' that terminates the declaration inside an
1694 Objective-C foreach statement. Do not consume the
1695 token, so that the caller can use it to determine
1696 that this indeed is a foreach context. */
1701 c_parser_error (parser
, "expected %<,%> or %<;%>");
1702 c_parser_skip_to_end_of_block_or_statement (parser
);
1708 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1709 "%<asm%> or %<__attribute__%>");
1710 c_parser_skip_to_end_of_block_or_statement (parser
);
1713 /* Function definition (nested or otherwise). */
1716 pedwarn (here
, OPT_Wpedantic
, "ISO C forbids nested functions");
1717 c_push_function_context ();
1719 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1721 /* This can appear in many cases looking nothing like a
1722 function definition, so we don't give a more specific
1723 error suggesting there was one. */
1724 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1725 "or %<__attribute__%>");
1727 c_pop_function_context ();
1731 if (DECL_DECLARED_INLINE_P (current_function_decl
))
1732 tv
= TV_PARSE_INLINE
;
1737 /* Parse old-style parameter declarations. ??? Attributes are
1738 not allowed to start declaration specifiers here because of a
1739 syntax conflict between a function declaration with attribute
1740 suffix and a function definition with an attribute prefix on
1741 first old-style parameter declaration. Following the old
1742 parser, they are not accepted on subsequent old-style
1743 parameter declarations either. However, there is no
1744 ambiguity after the first declaration, nor indeed on the
1745 first as long as we don't allow postfix attributes after a
1746 declarator with a nonempty identifier list in a definition;
1747 and postfix attributes have never been accepted here in
1748 function definitions either. */
1749 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1750 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1751 c_parser_declaration_or_fndef (parser
, false, false, false,
1753 store_parm_decls ();
1754 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1755 = c_parser_peek_token (parser
)->location
;
1756 fnbody
= c_parser_compound_statement (parser
);
1759 tree decl
= current_function_decl
;
1760 /* Mark nested functions as needing static-chain initially.
1761 lower_nested_functions will recompute it but the
1762 DECL_STATIC_CHAIN flag is also used before that happens,
1763 by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */
1764 DECL_STATIC_CHAIN (decl
) = 1;
1767 c_pop_function_context ();
1768 add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl
), DECL_EXPR
, decl
));
1781 /* Parse an asm-definition (asm() outside a function body). This is a
1789 c_parser_asm_definition (c_parser
*parser
)
1791 tree asm_str
= c_parser_simple_asm_expr (parser
);
1793 add_asm_node (asm_str
);
1794 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1797 /* Parse a static assertion (C11 6.7.10).
1799 static_assert-declaration:
1800 static_assert-declaration-no-semi ;
1804 c_parser_static_assert_declaration (c_parser
*parser
)
1806 c_parser_static_assert_declaration_no_semi (parser
);
1808 || !c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
1809 c_parser_skip_to_end_of_block_or_statement (parser
);
1812 /* Parse a static assertion (C11 6.7.10), without the trailing
1815 static_assert-declaration-no-semi:
1816 _Static_assert ( constant-expression , string-literal )
1820 c_parser_static_assert_declaration_no_semi (c_parser
*parser
)
1822 location_t assert_loc
, value_loc
;
1826 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
));
1827 assert_loc
= c_parser_peek_token (parser
)->location
;
1831 pedwarn (assert_loc
, OPT_Wpedantic
,
1832 "ISO C99 does not support %<_Static_assert%>");
1834 pedwarn (assert_loc
, OPT_Wpedantic
,
1835 "ISO C90 does not support %<_Static_assert%>");
1837 c_parser_consume_token (parser
);
1838 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1840 value_loc
= c_parser_peek_token (parser
)->location
;
1841 value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1842 parser
->lex_untranslated_string
= true;
1843 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
1845 parser
->lex_untranslated_string
= false;
1848 switch (c_parser_peek_token (parser
)->type
)
1854 case CPP_UTF8STRING
:
1855 string
= c_parser_peek_token (parser
)->value
;
1856 c_parser_consume_token (parser
);
1857 parser
->lex_untranslated_string
= false;
1860 c_parser_error (parser
, "expected string literal");
1861 parser
->lex_untranslated_string
= false;
1864 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
1866 if (!INTEGRAL_TYPE_P (TREE_TYPE (value
)))
1868 error_at (value_loc
, "expression in static assertion is not an integer");
1871 if (TREE_CODE (value
) != INTEGER_CST
)
1873 value
= c_fully_fold (value
, false, NULL
);
1874 if (TREE_CODE (value
) == INTEGER_CST
)
1875 pedwarn (value_loc
, OPT_Wpedantic
, "expression in static assertion "
1876 "is not an integer constant expression");
1878 if (TREE_CODE (value
) != INTEGER_CST
)
1880 error_at (value_loc
, "expression in static assertion is not constant");
1883 constant_expression_warning (value
);
1884 if (integer_zerop (value
))
1885 error_at (assert_loc
, "static assertion failed: %E", string
);
1888 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1889 6.7), adding them to SPECS (which may already include some).
1890 Storage class specifiers are accepted iff SCSPEC_OK; type
1891 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1892 the start iff START_ATTR_OK.
1894 declaration-specifiers:
1895 storage-class-specifier declaration-specifiers[opt]
1896 type-specifier declaration-specifiers[opt]
1897 type-qualifier declaration-specifiers[opt]
1898 function-specifier declaration-specifiers[opt]
1899 alignment-specifier declaration-specifiers[opt]
1901 Function specifiers (inline) are from C99, and are currently
1902 handled as storage class specifiers, as is __thread. Alignment
1903 specifiers are from C11.
1905 C90 6.5.1, C99 6.7.1:
1906 storage-class-specifier:
1918 (_Noreturn is new in C11.)
1920 C90 6.5.2, C99 6.7.2:
1933 [_Imaginary removed in C99 TC2]
1934 struct-or-union-specifier
1938 (_Bool and _Complex are new in C99.)
1940 C90 6.5.3, C99 6.7.3:
1946 address-space-qualifier
1948 (restrict is new in C99.)
1952 declaration-specifiers:
1953 attributes declaration-specifiers[opt]
1959 identifier recognized by the target
1961 storage-class-specifier:
1974 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1975 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1980 class-name objc-protocol-refs[opt]
1981 typedef-name objc-protocol-refs
1986 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1987 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
,
1988 enum c_lookahead_kind la
)
1990 bool attrs_ok
= start_attr_ok
;
1991 bool seen_type
= specs
->typespec_kind
!= ctsk_none
;
1994 gcc_assert (la
== cla_prefer_id
);
1996 while (c_parser_next_token_is (parser
, CPP_NAME
)
1997 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1998 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
2000 struct c_typespec t
;
2003 location_t loc
= c_parser_peek_token (parser
)->location
;
2005 /* If we cannot accept a type, exit if the next token must start
2006 one. Also, if we already have seen a tagged definition,
2007 a typename would be an error anyway and likely the user
2008 has simply forgotten a semicolon, so we exit. */
2009 if ((!typespec_ok
|| specs
->typespec_kind
== ctsk_tagdef
)
2010 && c_parser_next_tokens_start_typename (parser
, la
)
2011 && !c_parser_next_token_is_qualifier (parser
))
2014 if (c_parser_next_token_is (parser
, CPP_NAME
))
2016 c_token
*name_token
= c_parser_peek_token (parser
);
2017 tree value
= name_token
->value
;
2018 c_id_kind kind
= name_token
->id_kind
;
2020 if (kind
== C_ID_ADDRSPACE
)
2023 = name_token
->keyword
- RID_FIRST_ADDR_SPACE
;
2024 declspecs_add_addrspace (name_token
->location
, specs
, as
);
2025 c_parser_consume_token (parser
);
2030 gcc_assert (!c_parser_next_token_is_qualifier (parser
));
2032 /* If we cannot accept a type, and the next token must start one,
2033 exit. Do the same if we already have seen a tagged definition,
2034 since it would be an error anyway and likely the user has simply
2035 forgotten a semicolon. */
2036 if (seen_type
|| !c_parser_next_tokens_start_typename (parser
, la
))
2039 /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
2040 a C_ID_CLASSNAME. */
2041 c_parser_consume_token (parser
);
2044 if (kind
== C_ID_ID
)
2046 error ("unknown type name %qE", value
);
2047 t
.kind
= ctsk_typedef
;
2048 t
.spec
= error_mark_node
;
2050 else if (kind
== C_ID_TYPENAME
2051 && (!c_dialect_objc ()
2052 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
2054 t
.kind
= ctsk_typedef
;
2055 /* For a typedef name, record the meaning, not the name.
2056 In case of 'foo foo, bar;'. */
2057 t
.spec
= lookup_name (value
);
2061 tree proto
= NULL_TREE
;
2062 gcc_assert (c_dialect_objc ());
2064 if (c_parser_next_token_is (parser
, CPP_LESS
))
2065 proto
= c_parser_objc_protocol_refs (parser
);
2066 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
2069 t
.expr_const_operands
= true;
2070 declspecs_add_type (name_token
->location
, specs
, t
);
2073 if (c_parser_next_token_is (parser
, CPP_LESS
))
2075 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
2076 nisse@lysator.liu.se. */
2078 gcc_assert (c_dialect_objc ());
2079 if (!typespec_ok
|| seen_type
)
2081 proto
= c_parser_objc_protocol_refs (parser
);
2083 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
2085 t
.expr_const_operands
= true;
2086 declspecs_add_type (loc
, specs
, t
);
2089 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
2090 switch (c_parser_peek_token (parser
)->keyword
)
2103 /* TODO: Distinguish between function specifiers (inline, noreturn)
2104 and storage class specifiers, either here or in
2105 declspecs_add_scspec. */
2106 declspecs_add_scspec (loc
, specs
,
2107 c_parser_peek_token (parser
)->value
);
2108 c_parser_consume_token (parser
);
2132 if (c_dialect_objc ())
2133 parser
->objc_need_raw_identifier
= true;
2134 t
.kind
= ctsk_resword
;
2135 t
.spec
= c_parser_peek_token (parser
)->value
;
2137 t
.expr_const_operands
= true;
2138 declspecs_add_type (loc
, specs
, t
);
2139 c_parser_consume_token (parser
);
2146 t
= c_parser_enum_specifier (parser
);
2147 declspecs_add_type (loc
, specs
, t
);
2155 t
= c_parser_struct_or_union_specifier (parser
);
2156 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, t
.spec
);
2157 declspecs_add_type (loc
, specs
, t
);
2160 /* ??? The old parser rejected typeof after other type
2161 specifiers, but is a syntax error the best way of
2163 if (!typespec_ok
|| seen_type
)
2167 t
= c_parser_typeof_specifier (parser
);
2168 declspecs_add_type (loc
, specs
, t
);
2174 declspecs_add_qual (loc
, specs
, c_parser_peek_token (parser
)->value
);
2175 c_parser_consume_token (parser
);
2180 attrs
= c_parser_attributes (parser
);
2181 declspecs_add_attrs (loc
, specs
, attrs
);
2184 align
= c_parser_alignas_specifier (parser
);
2185 declspecs_add_alignas (loc
, specs
, align
);
2194 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
2197 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
2198 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
2199 enum attributes[opt] identifier
2201 The form with trailing comma is new in C99. The forms with
2202 attributes are GNU extensions. In GNU C, we accept any expression
2203 without commas in the syntax (assignment expressions, not just
2204 conditional expressions); assignment expressions will be diagnosed
2209 enumerator-list , enumerator
2212 enumeration-constant
2213 enumeration-constant = constant-expression
2216 static struct c_typespec
2217 c_parser_enum_specifier (c_parser
*parser
)
2219 struct c_typespec ret
;
2221 tree ident
= NULL_TREE
;
2222 location_t enum_loc
;
2223 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2224 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
2225 enum_loc
= c_parser_peek_token (parser
)->location
;
2226 c_parser_consume_token (parser
);
2227 attrs
= c_parser_attributes (parser
);
2228 enum_loc
= c_parser_peek_token (parser
)->location
;
2229 /* Set the location in case we create a decl now. */
2230 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2231 if (c_parser_next_token_is (parser
, CPP_NAME
))
2233 ident
= c_parser_peek_token (parser
)->value
;
2234 ident_loc
= c_parser_peek_token (parser
)->location
;
2235 enum_loc
= ident_loc
;
2236 c_parser_consume_token (parser
);
2238 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2240 /* Parse an enum definition. */
2241 struct c_enum_contents the_enum
;
2244 /* We chain the enumerators in reverse order, then put them in
2245 forward order at the end. */
2247 timevar_push (TV_PARSE_ENUM
);
2248 type
= start_enum (enum_loc
, &the_enum
, ident
);
2250 c_parser_consume_token (parser
);
2258 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2259 location_t decl_loc
, value_loc
;
2260 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
2262 c_parser_error (parser
, "expected identifier");
2263 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2264 values
= error_mark_node
;
2267 token
= c_parser_peek_token (parser
);
2268 enum_id
= token
->value
;
2269 /* Set the location in case we create a decl now. */
2270 c_parser_set_source_position_from_token (token
);
2271 decl_loc
= value_loc
= token
->location
;
2272 c_parser_consume_token (parser
);
2273 if (c_parser_next_token_is (parser
, CPP_EQ
))
2275 c_parser_consume_token (parser
);
2276 value_loc
= c_parser_peek_token (parser
)->location
;
2277 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
2280 enum_value
= NULL_TREE
;
2281 enum_decl
= build_enumerator (decl_loc
, value_loc
,
2282 &the_enum
, enum_id
, enum_value
);
2283 TREE_CHAIN (enum_decl
) = values
;
2286 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2288 comma_loc
= c_parser_peek_token (parser
)->location
;
2290 c_parser_consume_token (parser
);
2292 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2294 if (seen_comma
&& !flag_isoc99
)
2295 pedwarn (comma_loc
, OPT_Wpedantic
, "comma at end of enumerator list");
2296 c_parser_consume_token (parser
);
2301 c_parser_error (parser
, "expected %<,%> or %<}%>");
2302 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2303 values
= error_mark_node
;
2307 postfix_attrs
= c_parser_attributes (parser
);
2308 ret
.spec
= finish_enum (type
, nreverse (values
),
2309 chainon (attrs
, postfix_attrs
));
2310 ret
.kind
= ctsk_tagdef
;
2311 ret
.expr
= NULL_TREE
;
2312 ret
.expr_const_operands
= true;
2313 timevar_pop (TV_PARSE_ENUM
);
2318 c_parser_error (parser
, "expected %<{%>");
2319 ret
.spec
= error_mark_node
;
2320 ret
.kind
= ctsk_tagref
;
2321 ret
.expr
= NULL_TREE
;
2322 ret
.expr_const_operands
= true;
2325 ret
= parser_xref_tag (ident_loc
, ENUMERAL_TYPE
, ident
);
2326 /* In ISO C, enumerated types can be referred to only if already
2328 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
2331 pedwarn (enum_loc
, OPT_Wpedantic
,
2332 "ISO C forbids forward references to %<enum%> types");
2337 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
2339 struct-or-union-specifier:
2340 struct-or-union attributes[opt] identifier[opt]
2341 { struct-contents } attributes[opt]
2342 struct-or-union attributes[opt] identifier
2345 struct-declaration-list
2347 struct-declaration-list:
2348 struct-declaration ;
2349 struct-declaration-list struct-declaration ;
2356 struct-declaration-list struct-declaration
2358 struct-declaration-list:
2359 struct-declaration-list ;
2362 (Note that in the syntax here, unlike that in ISO C, the semicolons
2363 are included here rather than in struct-declaration, in order to
2364 describe the syntax with extra semicolons and missing semicolon at
2369 struct-declaration-list:
2370 @defs ( class-name )
2372 (Note this does not include a trailing semicolon, but can be
2373 followed by further declarations, and gets a pedwarn-if-pedantic
2374 when followed by a semicolon.) */
2376 static struct c_typespec
2377 c_parser_struct_or_union_specifier (c_parser
*parser
)
2379 struct c_typespec ret
;
2381 tree ident
= NULL_TREE
;
2382 location_t struct_loc
;
2383 location_t ident_loc
= UNKNOWN_LOCATION
;
2384 enum tree_code code
;
2385 switch (c_parser_peek_token (parser
)->keyword
)
2396 struct_loc
= c_parser_peek_token (parser
)->location
;
2397 c_parser_consume_token (parser
);
2398 attrs
= c_parser_attributes (parser
);
2400 /* Set the location in case we create a decl now. */
2401 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2403 if (c_parser_next_token_is (parser
, CPP_NAME
))
2405 ident
= c_parser_peek_token (parser
)->value
;
2406 ident_loc
= c_parser_peek_token (parser
)->location
;
2407 struct_loc
= ident_loc
;
2408 c_parser_consume_token (parser
);
2410 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2412 /* Parse a struct or union definition. Start the scope of the
2413 tag before parsing components. */
2414 struct c_struct_parse_info
*struct_info
;
2415 tree type
= start_struct (struct_loc
, code
, ident
, &struct_info
);
2417 /* We chain the components in reverse order, then put them in
2418 forward order at the end. Each struct-declaration may
2419 declare multiple components (comma-separated), so we must use
2420 chainon to join them, although when parsing each
2421 struct-declaration we can use TREE_CHAIN directly.
2423 The theory behind all this is that there will be more
2424 semicolon separated fields than comma separated fields, and
2425 so we'll be minimizing the number of node traversals required
2428 timevar_push (TV_PARSE_STRUCT
);
2429 contents
= NULL_TREE
;
2430 c_parser_consume_token (parser
);
2431 /* Handle the Objective-C @defs construct,
2432 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
2433 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
2436 gcc_assert (c_dialect_objc ());
2437 c_parser_consume_token (parser
);
2438 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2440 if (c_parser_next_token_is (parser
, CPP_NAME
)
2441 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
2443 name
= c_parser_peek_token (parser
)->value
;
2444 c_parser_consume_token (parser
);
2448 c_parser_error (parser
, "expected class name");
2449 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2452 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2454 contents
= nreverse (objc_get_class_ivars (name
));
2457 /* Parse the struct-declarations and semicolons. Problems with
2458 semicolons are diagnosed here; empty structures are diagnosed
2463 /* Parse any stray semicolon. */
2464 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2466 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
2467 "extra semicolon in struct or union specified");
2468 c_parser_consume_token (parser
);
2471 /* Stop if at the end of the struct or union contents. */
2472 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2474 c_parser_consume_token (parser
);
2477 /* Accept #pragmas at struct scope. */
2478 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
2480 c_parser_pragma (parser
, pragma_external
);
2483 /* Parse some comma-separated declarations, but not the
2484 trailing semicolon if any. */
2485 decls
= c_parser_struct_declaration (parser
);
2486 contents
= chainon (decls
, contents
);
2487 /* If no semicolon follows, either we have a parse error or
2488 are at the end of the struct or union and should
2490 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2491 c_parser_consume_token (parser
);
2494 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2495 pedwarn (c_parser_peek_token (parser
)->location
, 0,
2496 "no semicolon at end of struct or union");
2497 else if (parser
->error
2498 || !c_parser_next_token_starts_declspecs (parser
))
2500 c_parser_error (parser
, "expected %<;%>");
2501 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2505 /* If we come here, we have already emitted an error
2506 for an expected `;', identifier or `(', and we also
2507 recovered already. Go on with the next field. */
2510 postfix_attrs
= c_parser_attributes (parser
);
2511 ret
.spec
= finish_struct (struct_loc
, type
, nreverse (contents
),
2512 chainon (attrs
, postfix_attrs
), struct_info
);
2513 ret
.kind
= ctsk_tagdef
;
2514 ret
.expr
= NULL_TREE
;
2515 ret
.expr_const_operands
= true;
2516 timevar_pop (TV_PARSE_STRUCT
);
2521 c_parser_error (parser
, "expected %<{%>");
2522 ret
.spec
= error_mark_node
;
2523 ret
.kind
= ctsk_tagref
;
2524 ret
.expr
= NULL_TREE
;
2525 ret
.expr_const_operands
= true;
2528 ret
= parser_xref_tag (ident_loc
, code
, ident
);
2532 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
2533 the trailing semicolon.
2536 specifier-qualifier-list struct-declarator-list
2537 static_assert-declaration-no-semi
2539 specifier-qualifier-list:
2540 type-specifier specifier-qualifier-list[opt]
2541 type-qualifier specifier-qualifier-list[opt]
2542 attributes specifier-qualifier-list[opt]
2544 struct-declarator-list:
2546 struct-declarator-list , attributes[opt] struct-declarator
2549 declarator attributes[opt]
2550 declarator[opt] : constant-expression attributes[opt]
2555 __extension__ struct-declaration
2556 specifier-qualifier-list
2558 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
2559 of attributes where shown is a GNU extension. In GNU C, we accept
2560 any expression without commas in the syntax (assignment
2561 expressions, not just conditional expressions); assignment
2562 expressions will be diagnosed as non-constant. */
2565 c_parser_struct_declaration (c_parser
*parser
)
2567 struct c_declspecs
*specs
;
2569 tree all_prefix_attrs
;
2571 location_t decl_loc
;
2572 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2576 ext
= disable_extension_diagnostics ();
2577 c_parser_consume_token (parser
);
2578 decl
= c_parser_struct_declaration (parser
);
2579 restore_extension_diagnostics (ext
);
2582 if (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
2584 c_parser_static_assert_declaration_no_semi (parser
);
2587 specs
= build_null_declspecs ();
2588 decl_loc
= c_parser_peek_token (parser
)->location
;
2589 c_parser_declspecs (parser
, specs
, false, true, true, cla_nonabstract_decl
);
2592 if (!specs
->declspecs_seen_p
)
2594 c_parser_error (parser
, "expected specifier-qualifier-list");
2597 finish_declspecs (specs
);
2598 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2599 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2602 if (specs
->typespec_kind
== ctsk_none
)
2604 pedwarn (decl_loc
, OPT_Wpedantic
,
2605 "ISO C forbids member declarations with no members");
2606 shadow_tag_warned (specs
, pedantic
);
2611 /* Support for unnamed structs or unions as members of
2612 structs or unions (which is [a] useful and [b] supports
2616 ret
= grokfield (c_parser_peek_token (parser
)->location
,
2617 build_id_declarator (NULL_TREE
), specs
,
2620 decl_attributes (&ret
, attrs
, 0);
2625 /* Provide better error recovery. Note that a type name here is valid,
2626 and will be treated as a field name. */
2627 if (specs
->typespec_kind
== ctsk_tagdef
2628 && TREE_CODE (specs
->type
) != ENUMERAL_TYPE
2629 && c_parser_next_token_starts_declspecs (parser
)
2630 && !c_parser_next_token_is (parser
, CPP_NAME
))
2632 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
2633 parser
->error
= false;
2637 pending_xref_error ();
2638 prefix_attrs
= specs
->attrs
;
2639 all_prefix_attrs
= prefix_attrs
;
2640 specs
->attrs
= NULL_TREE
;
2644 /* Declaring one or more declarators or un-named bit-fields. */
2645 struct c_declarator
*declarator
;
2647 if (c_parser_next_token_is (parser
, CPP_COLON
))
2648 declarator
= build_id_declarator (NULL_TREE
);
2650 declarator
= c_parser_declarator (parser
,
2651 specs
->typespec_kind
!= ctsk_none
,
2652 C_DTR_NORMAL
, &dummy
);
2653 if (declarator
== NULL
)
2655 c_parser_skip_to_end_of_block_or_statement (parser
);
2658 if (c_parser_next_token_is (parser
, CPP_COLON
)
2659 || c_parser_next_token_is (parser
, CPP_COMMA
)
2660 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2661 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2662 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2664 tree postfix_attrs
= NULL_TREE
;
2665 tree width
= NULL_TREE
;
2667 if (c_parser_next_token_is (parser
, CPP_COLON
))
2669 c_parser_consume_token (parser
);
2670 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2672 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2673 postfix_attrs
= c_parser_attributes (parser
);
2674 d
= grokfield (c_parser_peek_token (parser
)->location
,
2675 declarator
, specs
, width
, &all_prefix_attrs
);
2676 decl_attributes (&d
, chainon (postfix_attrs
,
2677 all_prefix_attrs
), 0);
2678 DECL_CHAIN (d
) = decls
;
2680 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2681 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2684 all_prefix_attrs
= prefix_attrs
;
2685 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2686 c_parser_consume_token (parser
);
2687 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2688 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2690 /* Semicolon consumed in caller. */
2695 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2701 c_parser_error (parser
,
2702 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2703 "%<__attribute__%>");
2710 /* Parse a typeof specifier (a GNU extension).
2713 typeof ( expression )
2714 typeof ( type-name )
2717 static struct c_typespec
2718 c_parser_typeof_specifier (c_parser
*parser
)
2720 struct c_typespec ret
;
2721 ret
.kind
= ctsk_typeof
;
2722 ret
.spec
= error_mark_node
;
2723 ret
.expr
= NULL_TREE
;
2724 ret
.expr_const_operands
= true;
2725 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2726 c_parser_consume_token (parser
);
2727 c_inhibit_evaluation_warnings
++;
2729 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2731 c_inhibit_evaluation_warnings
--;
2735 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_id
))
2737 struct c_type_name
*type
= c_parser_type_name (parser
);
2738 c_inhibit_evaluation_warnings
--;
2742 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2743 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2749 location_t here
= c_parser_peek_token (parser
)->location
;
2750 struct c_expr expr
= c_parser_expression (parser
);
2751 c_inhibit_evaluation_warnings
--;
2753 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2754 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2755 error_at (here
, "%<typeof%> applied to a bit-field");
2756 mark_exp_read (expr
.value
);
2757 ret
.spec
= TREE_TYPE (expr
.value
);
2758 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2759 /* This is returned with the type so that when the type is
2760 evaluated, this can be evaluated. */
2762 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2763 pop_maybe_used (was_vm
);
2765 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2769 /* Parse an alignment-specifier.
2773 alignment-specifier:
2774 _Alignas ( type-name )
2775 _Alignas ( constant-expression )
2779 c_parser_alignas_specifier (c_parser
* parser
)
2781 tree ret
= error_mark_node
;
2782 location_t loc
= c_parser_peek_token (parser
)->location
;
2783 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNAS
));
2784 c_parser_consume_token (parser
);
2788 pedwarn (loc
, OPT_Wpedantic
,
2789 "ISO C99 does not support %<_Alignas%>");
2791 pedwarn (loc
, OPT_Wpedantic
,
2792 "ISO C90 does not support %<_Alignas%>");
2794 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2796 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_id
))
2798 struct c_type_name
*type
= c_parser_type_name (parser
);
2800 ret
= c_alignof (loc
, groktypename (type
, NULL
, NULL
));
2803 ret
= c_parser_expr_no_commas (parser
, NULL
).value
;
2804 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2808 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2809 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2810 be redeclared; otherwise it may not. KIND indicates which kind of
2811 declarator is wanted. Returns a valid declarator except in the
2812 case of a syntax error in which case NULL is returned. *SEEN_ID is
2813 set to true if an identifier being declared is seen; this is used
2814 to diagnose bad forms of abstract array declarators and to
2815 determine whether an identifier list is syntactically permitted.
2818 pointer[opt] direct-declarator
2822 ( attributes[opt] declarator )
2823 direct-declarator array-declarator
2824 direct-declarator ( parameter-type-list )
2825 direct-declarator ( identifier-list[opt] )
2828 * type-qualifier-list[opt]
2829 * type-qualifier-list[opt] pointer
2831 type-qualifier-list:
2834 type-qualifier-list type-qualifier
2835 type-qualifier-list attributes
2837 parameter-type-list:
2839 parameter-list , ...
2842 parameter-declaration
2843 parameter-list , parameter-declaration
2845 parameter-declaration:
2846 declaration-specifiers declarator attributes[opt]
2847 declaration-specifiers abstract-declarator[opt] attributes[opt]
2851 identifier-list , identifier
2853 abstract-declarator:
2855 pointer[opt] direct-abstract-declarator
2857 direct-abstract-declarator:
2858 ( attributes[opt] abstract-declarator )
2859 direct-abstract-declarator[opt] array-declarator
2860 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2865 direct-declarator ( parameter-forward-declarations
2866 parameter-type-list[opt] )
2868 direct-abstract-declarator:
2869 direct-abstract-declarator[opt] ( parameter-forward-declarations
2870 parameter-type-list[opt] )
2872 parameter-forward-declarations:
2874 parameter-forward-declarations parameter-list ;
2876 The uses of attributes shown above are GNU extensions.
2878 Some forms of array declarator are not included in C99 in the
2879 syntax for abstract declarators; these are disallowed elsewhere.
2880 This may be a defect (DR#289).
2882 This function also accepts an omitted abstract declarator as being
2883 an abstract declarator, although not part of the formal syntax. */
2885 static struct c_declarator
*
2886 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2889 /* Parse any initial pointer part. */
2890 if (c_parser_next_token_is (parser
, CPP_MULT
))
2892 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2893 struct c_declarator
*inner
;
2894 c_parser_consume_token (parser
);
2895 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2896 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2900 return make_pointer_declarator (quals_attrs
, inner
);
2902 /* Now we have a direct declarator, direct abstract declarator or
2903 nothing (which counts as a direct abstract declarator here). */
2904 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2907 /* Parse a direct declarator or direct abstract declarator; arguments
2908 as c_parser_declarator. */
2910 static struct c_declarator
*
2911 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2914 /* The direct declarator must start with an identifier (possibly
2915 omitted) or a parenthesized declarator (possibly abstract). In
2916 an ordinary declarator, initial parentheses must start a
2917 parenthesized declarator. In an abstract declarator or parameter
2918 declarator, they could start a parenthesized declarator or a
2919 parameter list. To tell which, the open parenthesis and any
2920 following attributes must be read. If a declaration specifier
2921 follows, then it is a parameter list; if the specifier is a
2922 typedef name, there might be an ambiguity about redeclaring it,
2923 which is resolved in the direction of treating it as a typedef
2924 name. If a close parenthesis follows, it is also an empty
2925 parameter list, as the syntax does not permit empty abstract
2926 declarators. Otherwise, it is a parenthesized declarator (in
2927 which case the analysis may be repeated inside it, recursively).
2929 ??? There is an ambiguity in a parameter declaration "int
2930 (__attribute__((foo)) x)", where x is not a typedef name: it
2931 could be an abstract declarator for a function, or declare x with
2932 parentheses. The proper resolution of this ambiguity needs
2933 documenting. At present we follow an accident of the old
2934 parser's implementation, whereby the first parameter must have
2935 some declaration specifiers other than just attributes. Thus as
2936 a parameter declaration it is treated as a parenthesized
2937 parameter named x, and as an abstract declarator it is
2940 ??? Also following the old parser, attributes inside an empty
2941 parameter list are ignored, making it a list not yielding a
2942 prototype, rather than giving an error or making it have one
2943 parameter with implicit type int.
2945 ??? Also following the old parser, typedef names may be
2946 redeclared in declarators, but not Objective-C class names. */
2948 if (kind
!= C_DTR_ABSTRACT
2949 && c_parser_next_token_is (parser
, CPP_NAME
)
2951 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
2952 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
2953 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2955 struct c_declarator
*inner
2956 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2958 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2959 c_parser_consume_token (parser
);
2960 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2963 if (kind
!= C_DTR_NORMAL
2964 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2966 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2967 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2970 /* Either we are at the end of an abstract declarator, or we have
2973 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2976 struct c_declarator
*inner
;
2977 c_parser_consume_token (parser
);
2978 attrs
= c_parser_attributes (parser
);
2979 if (kind
!= C_DTR_NORMAL
2980 && (c_parser_next_token_starts_declspecs (parser
)
2981 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2983 struct c_arg_info
*args
2984 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2991 = build_function_declarator (args
,
2992 build_id_declarator (NULL_TREE
));
2993 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2997 /* A parenthesized declarator. */
2998 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2999 if (inner
!= NULL
&& attrs
!= NULL
)
3000 inner
= build_attrs_declarator (attrs
, inner
);
3001 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3003 c_parser_consume_token (parser
);
3007 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
3011 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3018 if (kind
== C_DTR_NORMAL
)
3020 c_parser_error (parser
, "expected identifier or %<(%>");
3024 return build_id_declarator (NULL_TREE
);
3028 /* Parse part of a direct declarator or direct abstract declarator,
3029 given that some (in INNER) has already been parsed; ID_PRESENT is
3030 true if an identifier is present, false for an abstract
3033 static struct c_declarator
*
3034 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
3035 struct c_declarator
*inner
)
3037 /* Parse a sequence of array declarators and parameter lists. */
3038 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
3040 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3041 struct c_declarator
*declarator
;
3042 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
3046 c_parser_consume_token (parser
);
3047 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
3048 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
3050 c_parser_consume_token (parser
);
3051 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
3052 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
3053 if (!quals_attrs
->declspecs_seen_p
)
3055 /* If "static" is present, there must be an array dimension.
3056 Otherwise, there may be a dimension, "*", or no
3061 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
3065 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3070 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3072 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
3076 c_parser_consume_token (parser
);
3081 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
3087 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
3090 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3091 c_parser_consume_token (parser
);
3094 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3099 mark_exp_read (dimen
);
3100 declarator
= build_array_declarator (brace_loc
, dimen
, quals_attrs
,
3101 static_seen
, star_seen
);
3102 if (declarator
== NULL
)
3104 inner
= set_array_declarator_inner (declarator
, inner
);
3105 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3107 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
3110 struct c_arg_info
*args
;
3111 c_parser_consume_token (parser
);
3112 attrs
= c_parser_attributes (parser
);
3113 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
3118 inner
= build_function_declarator (args
, inner
);
3119 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3125 /* Parse a parameter list or identifier list, including the closing
3126 parenthesis but not the opening one. ATTRS are the attributes at
3127 the start of the list. ID_LIST_OK is true if an identifier list is
3128 acceptable; such a list must not have attributes at the start. */
3130 static struct c_arg_info
*
3131 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
3134 declare_parm_level ();
3135 /* If the list starts with an identifier, it is an identifier list.
3136 Otherwise, it is either a prototype list or an empty list. */
3139 && c_parser_next_token_is (parser
, CPP_NAME
)
3140 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3142 /* Look ahead to detect typos in type names. */
3143 && c_parser_peek_2nd_token (parser
)->type
!= CPP_NAME
3144 && c_parser_peek_2nd_token (parser
)->type
!= CPP_MULT
3145 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_PAREN
3146 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_SQUARE
)
3148 tree list
= NULL_TREE
, *nextp
= &list
;
3149 while (c_parser_next_token_is (parser
, CPP_NAME
)
3150 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
3152 *nextp
= build_tree_list (NULL_TREE
,
3153 c_parser_peek_token (parser
)->value
);
3154 nextp
= & TREE_CHAIN (*nextp
);
3155 c_parser_consume_token (parser
);
3156 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
3158 c_parser_consume_token (parser
);
3159 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3161 c_parser_error (parser
, "expected identifier");
3165 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3167 struct c_arg_info
*ret
= build_arg_info ();
3169 c_parser_consume_token (parser
);
3175 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3183 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
,
3190 /* Parse a parameter list (possibly empty), including the closing
3191 parenthesis but not the opening one. ATTRS are the attributes at
3192 the start of the list. EXPR is NULL or an expression that needs to
3193 be evaluated for the side effects of array size expressions in the
3196 static struct c_arg_info
*
3197 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
, tree expr
)
3199 bool bad_parm
= false;
3201 /* ??? Following the old parser, forward parameter declarations may
3202 use abstract declarators, and if no real parameter declarations
3203 follow the forward declarations then this is not diagnosed. Also
3204 note as above that attributes are ignored as the only contents of
3205 the parentheses, or as the only contents after forward
3207 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3209 struct c_arg_info
*ret
= build_arg_info ();
3210 c_parser_consume_token (parser
);
3213 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3215 struct c_arg_info
*ret
= build_arg_info ();
3217 if (flag_allow_parameterless_variadic_functions
)
3219 /* F (...) is allowed. */
3220 ret
->types
= NULL_TREE
;
3224 /* Suppress -Wold-style-definition for this case. */
3225 ret
->types
= error_mark_node
;
3226 error_at (c_parser_peek_token (parser
)->location
,
3227 "ISO C requires a named argument before %<...%>");
3229 c_parser_consume_token (parser
);
3230 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3232 c_parser_consume_token (parser
);
3237 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3242 /* Nonempty list of parameters, either terminated with semicolon
3243 (forward declarations; recurse) or with close parenthesis (normal
3244 function) or with ", ... )" (variadic function). */
3247 /* Parse a parameter. */
3248 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
3253 push_parm_decl (parm
, &expr
);
3254 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3257 c_parser_consume_token (parser
);
3258 mark_forward_parm_decls ();
3259 new_attrs
= c_parser_attributes (parser
);
3260 return c_parser_parms_list_declarator (parser
, new_attrs
, expr
);
3262 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3264 c_parser_consume_token (parser
);
3268 return get_parm_info (false, expr
);
3270 if (!c_parser_require (parser
, CPP_COMMA
,
3271 "expected %<;%>, %<,%> or %<)%>"))
3273 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3276 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3278 c_parser_consume_token (parser
);
3279 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3281 c_parser_consume_token (parser
);
3285 return get_parm_info (true, expr
);
3289 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3297 /* Parse a parameter declaration. ATTRS are the attributes at the
3298 start of the declaration if it is the first parameter. */
3300 static struct c_parm
*
3301 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
3303 struct c_declspecs
*specs
;
3304 struct c_declarator
*declarator
;
3306 tree postfix_attrs
= NULL_TREE
;
3309 /* Accept #pragmas between parameter declarations. */
3310 while (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3311 c_parser_pragma (parser
, pragma_external
);
3313 if (!c_parser_next_token_starts_declspecs (parser
))
3315 c_token
*token
= c_parser_peek_token (parser
);
3318 c_parser_set_source_position_from_token (token
);
3319 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
3321 error ("unknown type name %qE", token
->value
);
3322 parser
->error
= true;
3324 /* ??? In some Objective-C cases '...' isn't applicable so there
3325 should be a different message. */
3327 c_parser_error (parser
,
3328 "expected declaration specifiers or %<...%>");
3329 c_parser_skip_to_end_of_parameter (parser
);
3332 specs
= build_null_declspecs ();
3335 declspecs_add_attrs (input_location
, specs
, attrs
);
3338 c_parser_declspecs (parser
, specs
, true, true, true, cla_nonabstract_decl
);
3339 finish_declspecs (specs
);
3340 pending_xref_error ();
3341 prefix_attrs
= specs
->attrs
;
3342 specs
->attrs
= NULL_TREE
;
3343 declarator
= c_parser_declarator (parser
,
3344 specs
->typespec_kind
!= ctsk_none
,
3345 C_DTR_PARM
, &dummy
);
3346 if (declarator
== NULL
)
3348 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3351 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3352 postfix_attrs
= c_parser_attributes (parser
);
3353 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
3357 /* Parse a string literal in an asm expression. It should not be
3358 translated, and wide string literals are an error although
3359 permitted by the syntax. This is a GNU extension.
3364 ??? At present, following the old parser, the caller needs to have
3365 set lex_untranslated_string to 1. It would be better to follow the
3366 C++ parser rather than using this kludge. */
3369 c_parser_asm_string_literal (c_parser
*parser
)
3372 int save_flag
= warn_overlength_strings
;
3373 warn_overlength_strings
= 0;
3374 if (c_parser_next_token_is (parser
, CPP_STRING
))
3376 str
= c_parser_peek_token (parser
)->value
;
3377 c_parser_consume_token (parser
);
3379 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
3381 error_at (c_parser_peek_token (parser
)->location
,
3382 "wide string literal in %<asm%>");
3383 str
= build_string (1, "");
3384 c_parser_consume_token (parser
);
3388 c_parser_error (parser
, "expected string literal");
3391 warn_overlength_strings
= save_flag
;
3395 /* Parse a simple asm expression. This is used in restricted
3396 contexts, where a full expression with inputs and outputs does not
3397 make sense. This is a GNU extension.
3400 asm ( asm-string-literal )
3404 c_parser_simple_asm_expr (c_parser
*parser
)
3407 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
3408 /* ??? Follow the C++ parser rather than using the
3409 lex_untranslated_string kludge. */
3410 parser
->lex_untranslated_string
= true;
3411 c_parser_consume_token (parser
);
3412 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3414 parser
->lex_untranslated_string
= false;
3417 str
= c_parser_asm_string_literal (parser
);
3418 parser
->lex_untranslated_string
= false;
3419 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
3421 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3428 c_parser_attribute_any_word (c_parser
*parser
)
3430 tree attr_name
= NULL_TREE
;
3432 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
3434 /* ??? See comment above about what keywords are accepted here. */
3436 switch (c_parser_peek_token (parser
)->keyword
)
3467 case RID_TRANSACTION_ATOMIC
:
3468 case RID_TRANSACTION_CANCEL
:
3478 /* Accept __attribute__((__const)) as __attribute__((const)) etc. */
3479 attr_name
= ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
3481 else if (c_parser_next_token_is (parser
, CPP_NAME
))
3482 attr_name
= c_parser_peek_token (parser
)->value
;
3487 /* Parse (possibly empty) attributes. This is a GNU extension.
3491 attributes attribute
3494 __attribute__ ( ( attribute-list ) )
3498 attribute_list , attrib
3503 any-word ( identifier )
3504 any-word ( identifier , nonempty-expr-list )
3505 any-word ( expr-list )
3507 where the "identifier" must not be declared as a type, and
3508 "any-word" may be any identifier (including one declared as a
3509 type), a reserved word storage class specifier, type specifier or
3510 type qualifier. ??? This still leaves out most reserved keywords
3511 (following the old parser), shouldn't we include them, and why not
3512 allow identifiers declared as types to start the arguments? */
3515 c_parser_attributes (c_parser
*parser
)
3517 tree attrs
= NULL_TREE
;
3518 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3520 /* ??? Follow the C++ parser rather than using the
3521 lex_untranslated_string kludge. */
3522 parser
->lex_untranslated_string
= true;
3523 c_parser_consume_token (parser
);
3524 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3526 parser
->lex_untranslated_string
= false;
3529 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3531 parser
->lex_untranslated_string
= false;
3532 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3535 /* Parse the attribute list. */
3536 while (c_parser_next_token_is (parser
, CPP_COMMA
)
3537 || c_parser_next_token_is (parser
, CPP_NAME
)
3538 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
3540 tree attr
, attr_name
, attr_args
;
3541 vec
<tree
, va_gc
> *expr_list
;
3542 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3544 c_parser_consume_token (parser
);
3548 attr_name
= c_parser_attribute_any_word (parser
);
3549 if (attr_name
== NULL
)
3551 c_parser_consume_token (parser
);
3552 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
3554 attr
= build_tree_list (attr_name
, NULL_TREE
);
3555 attrs
= chainon (attrs
, attr
);
3558 c_parser_consume_token (parser
);
3559 /* Parse the attribute contents. If they start with an
3560 identifier which is followed by a comma or close
3561 parenthesis, then the arguments start with that
3562 identifier; otherwise they are an expression list.
3563 In objective-c the identifier may be a classname. */
3564 if (c_parser_next_token_is (parser
, CPP_NAME
)
3565 && (c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3566 || (c_dialect_objc ()
3567 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
3568 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
3569 || (c_parser_peek_2nd_token (parser
)->type
3570 == CPP_CLOSE_PAREN
)))
3572 tree arg1
= c_parser_peek_token (parser
)->value
;
3573 c_parser_consume_token (parser
);
3574 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3575 attr_args
= build_tree_list (NULL_TREE
, arg1
);
3579 c_parser_consume_token (parser
);
3580 expr_list
= c_parser_expr_list (parser
, false, true,
3582 tree_list
= build_tree_list_vec (expr_list
);
3583 attr_args
= tree_cons (NULL_TREE
, arg1
, tree_list
);
3584 release_tree_vector (expr_list
);
3589 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3590 attr_args
= NULL_TREE
;
3593 expr_list
= c_parser_expr_list (parser
, false, true,
3595 attr_args
= build_tree_list_vec (expr_list
);
3596 release_tree_vector (expr_list
);
3599 attr
= build_tree_list (attr_name
, attr_args
);
3600 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3601 c_parser_consume_token (parser
);
3604 parser
->lex_untranslated_string
= false;
3605 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3609 attrs
= chainon (attrs
, attr
);
3611 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3612 c_parser_consume_token (parser
);
3615 parser
->lex_untranslated_string
= false;
3616 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3620 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3621 c_parser_consume_token (parser
);
3624 parser
->lex_untranslated_string
= false;
3625 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3629 parser
->lex_untranslated_string
= false;
3634 /* Parse a type name (C90 6.5.5, C99 6.7.6).
3637 specifier-qualifier-list abstract-declarator[opt]
3640 static struct c_type_name
*
3641 c_parser_type_name (c_parser
*parser
)
3643 struct c_declspecs
*specs
= build_null_declspecs ();
3644 struct c_declarator
*declarator
;
3645 struct c_type_name
*ret
;
3647 c_parser_declspecs (parser
, specs
, false, true, true, cla_prefer_type
);
3648 if (!specs
->declspecs_seen_p
)
3650 c_parser_error (parser
, "expected specifier-qualifier-list");
3653 if (specs
->type
!= error_mark_node
)
3655 pending_xref_error ();
3656 finish_declspecs (specs
);
3658 declarator
= c_parser_declarator (parser
,
3659 specs
->typespec_kind
!= ctsk_none
,
3660 C_DTR_ABSTRACT
, &dummy
);
3661 if (declarator
== NULL
)
3663 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
3665 ret
->declarator
= declarator
;
3669 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
3672 assignment-expression
3673 { initializer-list }
3674 { initializer-list , }
3677 designation[opt] initializer
3678 initializer-list , designation[opt] initializer
3685 designator-list designator
3692 [ constant-expression ]
3704 [ constant-expression ... constant-expression ]
3706 Any expression without commas is accepted in the syntax for the
3707 constant-expressions, with non-constant expressions rejected later.
3709 This function is only used for top-level initializers; for nested
3710 ones, see c_parser_initval. */
3712 static struct c_expr
3713 c_parser_initializer (c_parser
*parser
)
3715 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3716 return c_parser_braced_init (parser
, NULL_TREE
, false);
3720 location_t loc
= c_parser_peek_token (parser
)->location
;
3721 ret
= c_parser_expr_no_commas (parser
, NULL
);
3722 if (TREE_CODE (ret
.value
) != STRING_CST
3723 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3724 ret
= default_function_array_read_conversion (loc
, ret
);
3729 /* Parse a braced initializer list. TYPE is the type specified for a
3730 compound literal, and NULL_TREE for other initializers and for
3731 nested braced lists. NESTED_P is true for nested braced lists,
3732 false for the list of a compound literal or the list that is the
3733 top-level initializer in a declaration. */
3735 static struct c_expr
3736 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3739 struct obstack braced_init_obstack
;
3740 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3741 gcc_obstack_init (&braced_init_obstack
);
3742 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3743 c_parser_consume_token (parser
);
3745 push_init_level (0, &braced_init_obstack
);
3747 really_start_incremental_init (type
);
3748 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3750 pedwarn (brace_loc
, OPT_Wpedantic
, "ISO C forbids empty initializer braces");
3754 /* Parse a non-empty initializer list, possibly with a trailing
3758 c_parser_initelt (parser
, &braced_init_obstack
);
3761 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3762 c_parser_consume_token (parser
);
3765 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3769 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3771 ret
.value
= error_mark_node
;
3772 ret
.original_code
= ERROR_MARK
;
3773 ret
.original_type
= NULL
;
3774 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3775 pop_init_level (0, &braced_init_obstack
);
3776 obstack_free (&braced_init_obstack
, NULL
);
3779 c_parser_consume_token (parser
);
3780 ret
= pop_init_level (0, &braced_init_obstack
);
3781 obstack_free (&braced_init_obstack
, NULL
);
3785 /* Parse a nested initializer, including designators. */
3788 c_parser_initelt (c_parser
*parser
, struct obstack
* braced_init_obstack
)
3790 /* Parse any designator or designator list. A single array
3791 designator may have the subsequent "=" omitted in GNU C, but a
3792 longer list or a structure member designator may not. */
3793 if (c_parser_next_token_is (parser
, CPP_NAME
)
3794 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3796 /* Old-style structure member designator. */
3797 set_init_label (c_parser_peek_token (parser
)->value
,
3798 braced_init_obstack
);
3799 /* Use the colon as the error location. */
3800 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_Wpedantic
,
3801 "obsolete use of designated initializer with %<:%>");
3802 c_parser_consume_token (parser
);
3803 c_parser_consume_token (parser
);
3807 /* des_seen is 0 if there have been no designators, 1 if there
3808 has been a single array designator and 2 otherwise. */
3810 /* Location of a designator. */
3811 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3812 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3813 || c_parser_next_token_is (parser
, CPP_DOT
))
3815 int des_prev
= des_seen
;
3817 des_loc
= c_parser_peek_token (parser
)->location
;
3820 if (c_parser_next_token_is (parser
, CPP_DOT
))
3823 c_parser_consume_token (parser
);
3824 if (c_parser_next_token_is (parser
, CPP_NAME
))
3826 set_init_label (c_parser_peek_token (parser
)->value
,
3827 braced_init_obstack
);
3828 c_parser_consume_token (parser
);
3833 init
.value
= error_mark_node
;
3834 init
.original_code
= ERROR_MARK
;
3835 init
.original_type
= NULL
;
3836 c_parser_error (parser
, "expected identifier");
3837 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3838 process_init_element (init
, false, braced_init_obstack
);
3845 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3846 /* ??? Following the old parser, [ objc-receiver
3847 objc-message-args ] is accepted as an initializer,
3848 being distinguished from a designator by what follows
3849 the first assignment expression inside the square
3850 brackets, but after a first array designator a
3851 subsequent square bracket is for Objective-C taken to
3852 start an expression, using the obsolete form of
3853 designated initializer without '=', rather than
3854 possibly being a second level of designation: in LALR
3855 terms, the '[' is shifted rather than reducing
3856 designator to designator-list. */
3857 if (des_prev
== 1 && c_dialect_objc ())
3859 des_seen
= des_prev
;
3862 if (des_prev
== 0 && c_dialect_objc ())
3864 /* This might be an array designator or an
3865 Objective-C message expression. If the former,
3866 continue parsing here; if the latter, parse the
3867 remainder of the initializer given the starting
3868 primary-expression. ??? It might make sense to
3869 distinguish when des_prev == 1 as well; see
3870 previous comment. */
3872 struct c_expr mexpr
;
3873 c_parser_consume_token (parser
);
3874 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3875 && ((c_parser_peek_token (parser
)->id_kind
3877 || (c_parser_peek_token (parser
)->id_kind
3878 == C_ID_CLASSNAME
)))
3880 /* Type name receiver. */
3881 tree id
= c_parser_peek_token (parser
)->value
;
3882 c_parser_consume_token (parser
);
3883 rec
= objc_get_class_reference (id
);
3884 goto parse_message_args
;
3886 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3887 mark_exp_read (first
);
3888 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3889 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3890 goto array_desig_after_first
;
3891 /* Expression receiver. So far only one part
3892 without commas has been parsed; there might be
3893 more of the expression. */
3895 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3898 location_t comma_loc
, exp_loc
;
3899 comma_loc
= c_parser_peek_token (parser
)->location
;
3900 c_parser_consume_token (parser
);
3901 exp_loc
= c_parser_peek_token (parser
)->location
;
3902 next
= c_parser_expr_no_commas (parser
, NULL
);
3903 next
= default_function_array_read_conversion (exp_loc
,
3905 rec
= build_compound_expr (comma_loc
, rec
, next
.value
);
3908 /* Now parse the objc-message-args. */
3909 args
= c_parser_objc_message_args (parser
);
3910 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3913 = objc_build_message_expr (rec
, args
);
3914 mexpr
.original_code
= ERROR_MARK
;
3915 mexpr
.original_type
= NULL
;
3916 /* Now parse and process the remainder of the
3917 initializer, starting with this message
3918 expression as a primary-expression. */
3919 c_parser_initval (parser
, &mexpr
, braced_init_obstack
);
3922 c_parser_consume_token (parser
);
3923 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3924 mark_exp_read (first
);
3925 array_desig_after_first
:
3926 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3928 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3929 c_parser_consume_token (parser
);
3930 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3931 mark_exp_read (second
);
3935 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3937 c_parser_consume_token (parser
);
3938 set_init_index (first
, second
, braced_init_obstack
);
3940 pedwarn (ellipsis_loc
, OPT_Wpedantic
,
3941 "ISO C forbids specifying range of elements to initialize");
3944 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3950 if (c_parser_next_token_is (parser
, CPP_EQ
))
3953 pedwarn (des_loc
, OPT_Wpedantic
,
3954 "ISO C90 forbids specifying subobject to initialize");
3955 c_parser_consume_token (parser
);
3960 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
3961 "obsolete use of designated initializer without %<=%>");
3965 init
.value
= error_mark_node
;
3966 init
.original_code
= ERROR_MARK
;
3967 init
.original_type
= NULL
;
3968 c_parser_error (parser
, "expected %<=%>");
3969 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3970 process_init_element (init
, false, braced_init_obstack
);
3976 c_parser_initval (parser
, NULL
, braced_init_obstack
);
3979 /* Parse a nested initializer; as c_parser_initializer but parses
3980 initializers within braced lists, after any designators have been
3981 applied. If AFTER is not NULL then it is an Objective-C message
3982 expression which is the primary-expression starting the
3986 c_parser_initval (c_parser
*parser
, struct c_expr
*after
,
3987 struct obstack
* braced_init_obstack
)
3990 gcc_assert (!after
|| c_dialect_objc ());
3991 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3992 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3995 location_t loc
= c_parser_peek_token (parser
)->location
;
3996 init
= c_parser_expr_no_commas (parser
, after
);
3997 if (init
.value
!= NULL_TREE
3998 && TREE_CODE (init
.value
) != STRING_CST
3999 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
4000 init
= default_function_array_read_conversion (loc
, init
);
4002 process_init_element (init
, false, braced_init_obstack
);
4005 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
4009 { block-item-list[opt] }
4010 { label-declarations block-item-list }
4014 block-item-list block-item
4026 { label-declarations block-item-list }
4029 __extension__ nested-declaration
4030 nested-function-definition
4034 label-declarations label-declaration
4037 __label__ identifier-list ;
4039 Allowing the mixing of declarations and code is new in C99. The
4040 GNU syntax also permits (not shown above) labels at the end of
4041 compound statements, which yield an error. We don't allow labels
4042 on declarations; this might seem like a natural extension, but
4043 there would be a conflict between attributes on the label and
4044 prefix attributes on the declaration. ??? The syntax follows the
4045 old parser in requiring something after label declarations.
4046 Although they are erroneous if the labels declared aren't defined,
4047 is it useful for the syntax to be this way?
4059 c_parser_compound_statement (c_parser
*parser
)
4062 location_t brace_loc
;
4063 brace_loc
= c_parser_peek_token (parser
)->location
;
4064 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
4066 /* Ensure a scope is entered and left anyway to avoid confusion
4067 if we have just prepared to enter a function body. */
4068 stmt
= c_begin_compound_stmt (true);
4069 c_end_compound_stmt (brace_loc
, stmt
, true);
4070 return error_mark_node
;
4072 stmt
= c_begin_compound_stmt (true);
4073 c_parser_compound_statement_nostart (parser
);
4074 return c_end_compound_stmt (brace_loc
, stmt
, true);
4077 /* Parse a compound statement except for the opening brace. This is
4078 used for parsing both compound statements and statement expressions
4079 (which follow different paths to handling the opening). */
4082 c_parser_compound_statement_nostart (c_parser
*parser
)
4084 bool last_stmt
= false;
4085 bool last_label
= false;
4086 bool save_valid_for_pragma
= valid_location_for_stdc_pragma_p ();
4087 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
4088 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
4090 c_parser_consume_token (parser
);
4093 mark_valid_location_for_stdc_pragma (true);
4094 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
4096 /* Read zero or more forward-declarations for labels that nested
4097 functions can jump to. */
4098 mark_valid_location_for_stdc_pragma (false);
4099 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
4101 label_loc
= c_parser_peek_token (parser
)->location
;
4102 c_parser_consume_token (parser
);
4103 /* Any identifiers, including those declared as type names,
4108 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
4110 c_parser_error (parser
, "expected identifier");
4114 = declare_label (c_parser_peek_token (parser
)->value
);
4115 C_DECLARED_LABEL_FLAG (label
) = 1;
4116 add_stmt (build_stmt (label_loc
, DECL_EXPR
, label
));
4117 c_parser_consume_token (parser
);
4118 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4119 c_parser_consume_token (parser
);
4123 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4125 pedwarn (label_loc
, OPT_Wpedantic
, "ISO C forbids label declarations");
4127 /* We must now have at least one statement, label or declaration. */
4128 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
4130 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4131 c_parser_error (parser
, "expected declaration or statement");
4132 c_parser_consume_token (parser
);
4135 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
4137 location_t loc
= c_parser_peek_token (parser
)->location
;
4138 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4139 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4140 || (c_parser_next_token_is (parser
, CPP_NAME
)
4141 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4143 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4144 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
4146 label_loc
= c_parser_peek_token (parser
)->location
;
4149 mark_valid_location_for_stdc_pragma (false);
4150 c_parser_label (parser
);
4152 else if (!last_label
4153 && c_parser_next_tokens_start_declaration (parser
))
4156 mark_valid_location_for_stdc_pragma (false);
4157 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
4160 (pedantic
&& !flag_isoc99
)
4162 : OPT_Wdeclaration_after_statement
,
4163 "ISO C90 forbids mixed declarations and code");
4166 else if (!last_label
4167 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4169 /* __extension__ can start a declaration, but is also an
4170 unary operator that can start an expression. Consume all
4171 but the last of a possible series of __extension__ to
4173 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4174 && (c_parser_peek_2nd_token (parser
)->keyword
4176 c_parser_consume_token (parser
);
4177 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4180 ext
= disable_extension_diagnostics ();
4181 c_parser_consume_token (parser
);
4183 mark_valid_location_for_stdc_pragma (false);
4184 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4186 /* Following the old parser, __extension__ does not
4187 disable this diagnostic. */
4188 restore_extension_diagnostics (ext
);
4190 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
4192 : OPT_Wdeclaration_after_statement
,
4193 "ISO C90 forbids mixed declarations and code");
4199 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
4201 /* External pragmas, and some omp pragmas, are not associated
4202 with regular c code, and so are not to be considered statements
4203 syntactically. This ensures that the user doesn't put them
4204 places that would turn into syntax errors if the directive
4206 if (c_parser_pragma (parser
, pragma_compound
))
4207 last_label
= false, last_stmt
= true;
4209 else if (c_parser_next_token_is (parser
, CPP_EOF
))
4211 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4212 c_parser_error (parser
, "expected declaration or statement");
4215 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4217 if (parser
->in_if_block
)
4219 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4220 error_at (loc
, """expected %<}%> before %<else%>");
4225 error_at (loc
, "%<else%> without a previous %<if%>");
4226 c_parser_consume_token (parser
);
4235 mark_valid_location_for_stdc_pragma (false);
4236 c_parser_statement_after_labels (parser
);
4239 parser
->error
= false;
4242 error_at (label_loc
, "label at end of compound statement");
4243 c_parser_consume_token (parser
);
4244 /* Restore the value we started with. */
4245 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4248 /* Parse a label (C90 6.6.1, C99 6.8.1).
4251 identifier : attributes[opt]
4252 case constant-expression :
4258 case constant-expression ... constant-expression :
4260 The use of attributes on labels is a GNU extension. The syntax in
4261 GNU C accepts any expressions without commas, non-constant
4262 expressions being rejected later. */
4265 c_parser_label (c_parser
*parser
)
4267 location_t loc1
= c_parser_peek_token (parser
)->location
;
4268 tree label
= NULL_TREE
;
4269 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4272 c_parser_consume_token (parser
);
4273 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
4274 if (c_parser_next_token_is (parser
, CPP_COLON
))
4276 c_parser_consume_token (parser
);
4277 label
= do_case (loc1
, exp1
, NULL_TREE
);
4279 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
4281 c_parser_consume_token (parser
);
4282 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
4283 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4284 label
= do_case (loc1
, exp1
, exp2
);
4287 c_parser_error (parser
, "expected %<:%> or %<...%>");
4289 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
4291 c_parser_consume_token (parser
);
4292 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4293 label
= do_case (loc1
, NULL_TREE
, NULL_TREE
);
4297 tree name
= c_parser_peek_token (parser
)->value
;
4300 location_t loc2
= c_parser_peek_token (parser
)->location
;
4301 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
4302 c_parser_consume_token (parser
);
4303 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
4304 c_parser_consume_token (parser
);
4305 attrs
= c_parser_attributes (parser
);
4306 tlab
= define_label (loc2
, name
);
4309 decl_attributes (&tlab
, attrs
, 0);
4310 label
= add_stmt (build_stmt (loc1
, LABEL_EXPR
, tlab
));
4315 if (c_parser_next_tokens_start_declaration (parser
))
4317 error_at (c_parser_peek_token (parser
)->location
,
4318 "a label can only be part of a statement and "
4319 "a declaration is not a statement");
4320 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
4321 /*static_assert_ok*/ true,
4322 /*empty_ok*/ true, /*nested*/ true,
4323 /*start_attr_ok*/ true, NULL
);
4328 /* Parse a statement (C90 6.6, C99 6.8).
4333 expression-statement
4341 expression-statement:
4344 selection-statement:
4348 iteration-statement:
4357 return expression[opt] ;
4370 objc-throw-statement
4371 objc-try-catch-statement
4372 objc-synchronized-statement
4374 objc-throw-statement:
4388 parallel-for-construct
4389 parallel-sections-construct
4396 parallel-directive structured-block
4399 for-directive iteration-statement
4402 sections-directive section-scope
4405 single-directive structured-block
4407 parallel-for-construct:
4408 parallel-for-directive iteration-statement
4410 parallel-sections-construct:
4411 parallel-sections-directive section-scope
4414 master-directive structured-block
4417 critical-directive structured-block
4420 atomic-directive expression-statement
4423 ordered-directive structured-block
4425 Transactional Memory:
4428 transaction-statement
4429 transaction-cancel-statement
4433 c_parser_statement (c_parser
*parser
)
4435 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4436 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4437 || (c_parser_next_token_is (parser
, CPP_NAME
)
4438 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4439 c_parser_label (parser
);
4440 c_parser_statement_after_labels (parser
);
4443 /* Parse a statement, other than a labeled statement. */
4446 c_parser_statement_after_labels (c_parser
*parser
)
4448 location_t loc
= c_parser_peek_token (parser
)->location
;
4449 tree stmt
= NULL_TREE
;
4450 bool in_if_block
= parser
->in_if_block
;
4451 parser
->in_if_block
= false;
4452 switch (c_parser_peek_token (parser
)->type
)
4454 case CPP_OPEN_BRACE
:
4455 add_stmt (c_parser_compound_statement (parser
));
4458 switch (c_parser_peek_token (parser
)->keyword
)
4461 c_parser_if_statement (parser
);
4464 c_parser_switch_statement (parser
);
4467 c_parser_while_statement (parser
);
4470 c_parser_do_statement (parser
);
4473 c_parser_for_statement (parser
);
4476 c_parser_consume_token (parser
);
4477 if (c_parser_next_token_is (parser
, CPP_NAME
))
4479 stmt
= c_finish_goto_label (loc
,
4480 c_parser_peek_token (parser
)->value
);
4481 c_parser_consume_token (parser
);
4483 else if (c_parser_next_token_is (parser
, CPP_MULT
))
4487 c_parser_consume_token (parser
);
4488 val
= c_parser_expression (parser
).value
;
4489 mark_exp_read (val
);
4490 stmt
= c_finish_goto_ptr (loc
, val
);
4493 c_parser_error (parser
, "expected identifier or %<*%>");
4494 goto expect_semicolon
;
4496 c_parser_consume_token (parser
);
4497 stmt
= c_finish_bc_stmt (loc
, &c_cont_label
, false);
4498 goto expect_semicolon
;
4500 c_parser_consume_token (parser
);
4501 stmt
= c_finish_bc_stmt (loc
, &c_break_label
, true);
4502 goto expect_semicolon
;
4504 c_parser_consume_token (parser
);
4505 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4507 stmt
= c_finish_return (loc
, NULL_TREE
, NULL_TREE
);
4508 c_parser_consume_token (parser
);
4512 struct c_expr expr
= c_parser_expression_conv (parser
);
4513 mark_exp_read (expr
.value
);
4514 stmt
= c_finish_return (loc
, expr
.value
, expr
.original_type
);
4515 goto expect_semicolon
;
4519 stmt
= c_parser_asm_statement (parser
);
4521 case RID_TRANSACTION_ATOMIC
:
4522 case RID_TRANSACTION_RELAXED
:
4523 stmt
= c_parser_transaction (parser
,
4524 c_parser_peek_token (parser
)->keyword
);
4526 case RID_TRANSACTION_CANCEL
:
4527 stmt
= c_parser_transaction_cancel (parser
);
4528 goto expect_semicolon
;
4530 gcc_assert (c_dialect_objc ());
4531 c_parser_consume_token (parser
);
4532 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4534 stmt
= objc_build_throw_stmt (loc
, NULL_TREE
);
4535 c_parser_consume_token (parser
);
4539 tree expr
= c_parser_expression (parser
).value
;
4540 expr
= c_fully_fold (expr
, false, NULL
);
4541 stmt
= objc_build_throw_stmt (loc
, expr
);
4542 goto expect_semicolon
;
4546 gcc_assert (c_dialect_objc ());
4547 c_parser_objc_try_catch_finally_statement (parser
);
4549 case RID_AT_SYNCHRONIZED
:
4550 gcc_assert (c_dialect_objc ());
4551 c_parser_objc_synchronized_statement (parser
);
4558 c_parser_consume_token (parser
);
4560 case CPP_CLOSE_PAREN
:
4561 case CPP_CLOSE_SQUARE
:
4562 /* Avoid infinite loop in error recovery:
4563 c_parser_skip_until_found stops at a closing nesting
4564 delimiter without consuming it, but here we need to consume
4565 it to proceed further. */
4566 c_parser_error (parser
, "expected statement");
4567 c_parser_consume_token (parser
);
4570 c_parser_pragma (parser
, pragma_stmt
);
4574 stmt
= c_finish_expr_stmt (loc
, c_parser_expression_conv (parser
).value
);
4576 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4579 /* Two cases cannot and do not have line numbers associated: If stmt
4580 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
4581 cannot hold line numbers. But that's OK because the statement
4582 will either be changed to a MODIFY_EXPR during gimplification of
4583 the statement expr, or discarded. If stmt was compound, but
4584 without new variables, we will have skipped the creation of a
4585 BIND and will have a bare STATEMENT_LIST. But that's OK because
4586 (recursively) all of the component statements should already have
4587 line numbers assigned. ??? Can we discard no-op statements
4589 if (CAN_HAVE_LOCATION_P (stmt
)
4590 && EXPR_LOCATION (stmt
) == UNKNOWN_LOCATION
)
4591 SET_EXPR_LOCATION (stmt
, loc
);
4593 parser
->in_if_block
= in_if_block
;
4596 /* Parse the condition from an if, do, while or for statements. */
4599 c_parser_condition (c_parser
*parser
)
4601 location_t loc
= c_parser_peek_token (parser
)->location
;
4603 cond
= c_parser_expression_conv (parser
).value
;
4604 cond
= c_objc_common_truthvalue_conversion (loc
, cond
);
4605 cond
= c_fully_fold (cond
, false, NULL
);
4606 if (warn_sequence_point
)
4607 verify_sequence_points (cond
);
4611 /* Parse a parenthesized condition from an if, do or while statement.
4617 c_parser_paren_condition (c_parser
*parser
)
4620 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4621 return error_mark_node
;
4622 cond
= c_parser_condition (parser
);
4623 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4627 /* Parse a statement which is a block in C99. */
4630 c_parser_c99_block_statement (c_parser
*parser
)
4632 tree block
= c_begin_compound_stmt (flag_isoc99
);
4633 location_t loc
= c_parser_peek_token (parser
)->location
;
4634 c_parser_statement (parser
);
4635 return c_end_compound_stmt (loc
, block
, flag_isoc99
);
4638 /* Parse the body of an if statement. This is just parsing a
4639 statement but (a) it is a block in C99, (b) we track whether the
4640 body is an if statement for the sake of -Wparentheses warnings, (c)
4641 we handle an empty body specially for the sake of -Wempty-body
4642 warnings, and (d) we call parser_compound_statement directly
4643 because c_parser_statement_after_labels resets
4644 parser->in_if_block. */
4647 c_parser_if_body (c_parser
*parser
, bool *if_p
)
4649 tree block
= c_begin_compound_stmt (flag_isoc99
);
4650 location_t body_loc
= c_parser_peek_token (parser
)->location
;
4651 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4652 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4653 || (c_parser_next_token_is (parser
, CPP_NAME
)
4654 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4655 c_parser_label (parser
);
4656 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
4657 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4659 location_t loc
= c_parser_peek_token (parser
)->location
;
4660 add_stmt (build_empty_stmt (loc
));
4661 c_parser_consume_token (parser
);
4662 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4663 warning_at (loc
, OPT_Wempty_body
,
4664 "suggest braces around empty body in an %<if%> statement");
4666 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4667 add_stmt (c_parser_compound_statement (parser
));
4669 c_parser_statement_after_labels (parser
);
4670 return c_end_compound_stmt (body_loc
, block
, flag_isoc99
);
4673 /* Parse the else body of an if statement. This is just parsing a
4674 statement but (a) it is a block in C99, (b) we handle an empty body
4675 specially for the sake of -Wempty-body warnings. */
4678 c_parser_else_body (c_parser
*parser
)
4680 location_t else_loc
= c_parser_peek_token (parser
)->location
;
4681 tree block
= c_begin_compound_stmt (flag_isoc99
);
4682 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4683 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4684 || (c_parser_next_token_is (parser
, CPP_NAME
)
4685 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4686 c_parser_label (parser
);
4687 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4689 location_t loc
= c_parser_peek_token (parser
)->location
;
4692 "suggest braces around empty body in an %<else%> statement");
4693 add_stmt (build_empty_stmt (loc
));
4694 c_parser_consume_token (parser
);
4697 c_parser_statement_after_labels (parser
);
4698 return c_end_compound_stmt (else_loc
, block
, flag_isoc99
);
4701 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
4704 if ( expression ) statement
4705 if ( expression ) statement else statement
4709 c_parser_if_statement (c_parser
*parser
)
4714 bool first_if
= false;
4715 tree first_body
, second_body
;
4718 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
4719 c_parser_consume_token (parser
);
4720 block
= c_begin_compound_stmt (flag_isoc99
);
4721 loc
= c_parser_peek_token (parser
)->location
;
4722 cond
= c_parser_paren_condition (parser
);
4723 in_if_block
= parser
->in_if_block
;
4724 parser
->in_if_block
= true;
4725 first_body
= c_parser_if_body (parser
, &first_if
);
4726 parser
->in_if_block
= in_if_block
;
4727 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4729 c_parser_consume_token (parser
);
4730 second_body
= c_parser_else_body (parser
);
4733 second_body
= NULL_TREE
;
4734 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
4735 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4738 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
4741 switch (expression) statement
4745 c_parser_switch_statement (c_parser
*parser
)
4747 tree block
, expr
, body
, save_break
;
4748 location_t switch_loc
= c_parser_peek_token (parser
)->location
;
4749 location_t switch_cond_loc
;
4750 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
4751 c_parser_consume_token (parser
);
4752 block
= c_begin_compound_stmt (flag_isoc99
);
4753 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4755 switch_cond_loc
= c_parser_peek_token (parser
)->location
;
4756 expr
= c_parser_expression (parser
).value
;
4757 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4761 switch_cond_loc
= UNKNOWN_LOCATION
;
4762 expr
= error_mark_node
;
4764 c_start_case (switch_loc
, switch_cond_loc
, expr
);
4765 save_break
= c_break_label
;
4766 c_break_label
= NULL_TREE
;
4767 body
= c_parser_c99_block_statement (parser
);
4768 c_finish_case (body
);
4771 location_t here
= c_parser_peek_token (parser
)->location
;
4772 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_break_label
);
4773 SET_EXPR_LOCATION (t
, here
);
4776 c_break_label
= save_break
;
4777 add_stmt (c_end_compound_stmt (switch_loc
, block
, flag_isoc99
));
4780 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
4783 while (expression) statement
4787 c_parser_while_statement (c_parser
*parser
)
4789 tree block
, cond
, body
, save_break
, save_cont
;
4791 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
4792 c_parser_consume_token (parser
);
4793 block
= c_begin_compound_stmt (flag_isoc99
);
4794 loc
= c_parser_peek_token (parser
)->location
;
4795 cond
= c_parser_paren_condition (parser
);
4796 save_break
= c_break_label
;
4797 c_break_label
= NULL_TREE
;
4798 save_cont
= c_cont_label
;
4799 c_cont_label
= NULL_TREE
;
4800 body
= c_parser_c99_block_statement (parser
);
4801 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
4802 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4803 c_break_label
= save_break
;
4804 c_cont_label
= save_cont
;
4807 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4810 do statement while ( expression ) ;
4814 c_parser_do_statement (c_parser
*parser
)
4816 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4818 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4819 c_parser_consume_token (parser
);
4820 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4821 warning_at (c_parser_peek_token (parser
)->location
,
4823 "suggest braces around empty body in %<do%> statement");
4824 block
= c_begin_compound_stmt (flag_isoc99
);
4825 loc
= c_parser_peek_token (parser
)->location
;
4826 save_break
= c_break_label
;
4827 c_break_label
= NULL_TREE
;
4828 save_cont
= c_cont_label
;
4829 c_cont_label
= NULL_TREE
;
4830 body
= c_parser_c99_block_statement (parser
);
4831 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4832 new_break
= c_break_label
;
4833 c_break_label
= save_break
;
4834 new_cont
= c_cont_label
;
4835 c_cont_label
= save_cont
;
4836 cond
= c_parser_paren_condition (parser
);
4837 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4838 c_parser_skip_to_end_of_block_or_statement (parser
);
4839 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4840 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4843 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4846 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4847 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4849 The form with a declaration is new in C99.
4851 ??? In accordance with the old parser, the declaration may be a
4852 nested function, which is then rejected in check_for_loop_decls,
4853 but does it make any sense for this to be included in the grammar?
4854 Note in particular that the nested function does not include a
4855 trailing ';', whereas the "declaration" production includes one.
4856 Also, can we reject bad declarations earlier and cheaper than
4857 check_for_loop_decls?
4859 In Objective-C, there are two additional variants:
4862 for ( expression in expresssion ) statement
4863 for ( declaration in expression ) statement
4865 This is inconsistent with C, because the second variant is allowed
4866 even if c99 is not enabled.
4868 The rest of the comment documents these Objective-C foreach-statement.
4870 Here is the canonical example of the first variant:
4871 for (object in array) { do something with object }
4872 we call the first expression ("object") the "object_expression" and
4873 the second expression ("array") the "collection_expression".
4874 object_expression must be an lvalue of type "id" (a generic Objective-C
4875 object) because the loop works by assigning to object_expression the
4876 various objects from the collection_expression. collection_expression
4877 must evaluate to something of type "id" which responds to the method
4878 countByEnumeratingWithState:objects:count:.
4880 The canonical example of the second variant is:
4881 for (id object in array) { do something with object }
4882 which is completely equivalent to
4885 for (object in array) { do something with object }
4887 Note that initizializing 'object' in some way (eg, "for ((object =
4888 xxx) in array) { do something with object }") is possibly
4889 technically valid, but completely pointless as 'object' will be
4890 assigned to something else as soon as the loop starts. We should
4891 most likely reject it (TODO).
4893 The beginning of the Objective-C foreach-statement looks exactly
4894 like the beginning of the for-statement, and we can tell it is a
4895 foreach-statement only because the initial declaration or
4896 expression is terminated by 'in' instead of ';'.
4900 c_parser_for_statement (c_parser
*parser
)
4902 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4903 /* The following are only used when parsing an ObjC foreach statement. */
4904 tree object_expression
;
4905 /* Silence the bogus uninitialized warning. */
4906 tree collection_expression
= NULL
;
4907 location_t loc
= c_parser_peek_token (parser
)->location
;
4908 location_t for_loc
= c_parser_peek_token (parser
)->location
;
4909 bool is_foreach_statement
= false;
4910 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4911 c_parser_consume_token (parser
);
4912 /* Open a compound statement in Objective-C as well, just in case this is
4913 as foreach expression. */
4914 block
= c_begin_compound_stmt (flag_isoc99
|| c_dialect_objc ());
4915 cond
= error_mark_node
;
4916 incr
= error_mark_node
;
4917 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4919 /* Parse the initialization declaration or expression. */
4920 object_expression
= error_mark_node
;
4921 parser
->objc_could_be_foreach_context
= c_dialect_objc ();
4922 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4924 parser
->objc_could_be_foreach_context
= false;
4925 c_parser_consume_token (parser
);
4926 c_finish_expr_stmt (loc
, NULL_TREE
);
4928 else if (c_parser_next_tokens_start_declaration (parser
))
4930 c_parser_declaration_or_fndef (parser
, true, true, true, true, true,
4931 &object_expression
);
4932 parser
->objc_could_be_foreach_context
= false;
4934 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4936 c_parser_consume_token (parser
);
4937 is_foreach_statement
= true;
4938 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4939 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4942 check_for_loop_decls (for_loc
, flag_isoc99
);
4944 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4946 /* __extension__ can start a declaration, but is also an
4947 unary operator that can start an expression. Consume all
4948 but the last of a possible series of __extension__ to
4950 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4951 && (c_parser_peek_2nd_token (parser
)->keyword
4953 c_parser_consume_token (parser
);
4954 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4957 ext
= disable_extension_diagnostics ();
4958 c_parser_consume_token (parser
);
4959 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4960 true, &object_expression
);
4961 parser
->objc_could_be_foreach_context
= false;
4963 restore_extension_diagnostics (ext
);
4964 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4966 c_parser_consume_token (parser
);
4967 is_foreach_statement
= true;
4968 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4969 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4972 check_for_loop_decls (for_loc
, flag_isoc99
);
4981 tree init_expression
;
4982 init_expression
= c_parser_expression (parser
).value
;
4983 parser
->objc_could_be_foreach_context
= false;
4984 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4986 c_parser_consume_token (parser
);
4987 is_foreach_statement
= true;
4988 if (! lvalue_p (init_expression
))
4989 c_parser_error (parser
, "invalid iterating variable in fast enumeration");
4990 object_expression
= c_fully_fold (init_expression
, false, NULL
);
4994 c_finish_expr_stmt (loc
, init_expression
);
4995 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4999 /* Parse the loop condition. In the case of a foreach
5000 statement, there is no loop condition. */
5001 gcc_assert (!parser
->objc_could_be_foreach_context
);
5002 if (!is_foreach_statement
)
5004 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5006 c_parser_consume_token (parser
);
5011 cond
= c_parser_condition (parser
);
5012 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5015 /* Parse the increment expression (the third expression in a
5016 for-statement). In the case of a foreach-statement, this is
5017 the expression that follows the 'in'. */
5018 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5020 if (is_foreach_statement
)
5022 c_parser_error (parser
, "missing collection in fast enumeration");
5023 collection_expression
= error_mark_node
;
5026 incr
= c_process_expr_stmt (loc
, NULL_TREE
);
5030 if (is_foreach_statement
)
5031 collection_expression
= c_fully_fold (c_parser_expression (parser
).value
,
5034 incr
= c_process_expr_stmt (loc
, c_parser_expression (parser
).value
);
5036 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5038 save_break
= c_break_label
;
5039 c_break_label
= NULL_TREE
;
5040 save_cont
= c_cont_label
;
5041 c_cont_label
= NULL_TREE
;
5042 body
= c_parser_c99_block_statement (parser
);
5043 if (is_foreach_statement
)
5044 objc_finish_foreach_loop (loc
, object_expression
, collection_expression
, body
, c_break_label
, c_cont_label
);
5046 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
5047 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
|| c_dialect_objc ()));
5048 c_break_label
= save_break
;
5049 c_cont_label
= save_cont
;
5052 /* Parse an asm statement, a GNU extension. This is a full-blown asm
5053 statement with inputs, outputs, clobbers, and volatile tag
5057 asm type-qualifier[opt] ( asm-argument ) ;
5058 asm type-qualifier[opt] goto ( asm-goto-argument ) ;
5062 asm-string-literal : asm-operands[opt]
5063 asm-string-literal : asm-operands[opt] : asm-operands[opt]
5064 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
5067 asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
5070 Qualifiers other than volatile are accepted in the syntax but
5074 c_parser_asm_statement (c_parser
*parser
)
5076 tree quals
, str
, outputs
, inputs
, clobbers
, labels
, ret
;
5077 bool simple
, is_goto
;
5078 location_t asm_loc
= c_parser_peek_token (parser
)->location
;
5079 int section
, nsections
;
5081 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
5082 c_parser_consume_token (parser
);
5083 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
5085 quals
= c_parser_peek_token (parser
)->value
;
5086 c_parser_consume_token (parser
);
5088 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
5089 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
5091 warning_at (c_parser_peek_token (parser
)->location
,
5093 "%E qualifier ignored on asm",
5094 c_parser_peek_token (parser
)->value
);
5096 c_parser_consume_token (parser
);
5102 if (c_parser_next_token_is_keyword (parser
, RID_GOTO
))
5104 c_parser_consume_token (parser
);
5108 /* ??? Follow the C++ parser rather than using the
5109 lex_untranslated_string kludge. */
5110 parser
->lex_untranslated_string
= true;
5113 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5116 str
= c_parser_asm_string_literal (parser
);
5117 if (str
== NULL_TREE
)
5118 goto error_close_paren
;
5121 outputs
= NULL_TREE
;
5123 clobbers
= NULL_TREE
;
5126 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5129 /* Parse each colon-delimited section of operands. */
5130 nsections
= 3 + is_goto
;
5131 for (section
= 0; section
< nsections
; ++section
)
5133 if (!c_parser_require (parser
, CPP_COLON
,
5136 : "expected %<:%> or %<)%>"))
5137 goto error_close_paren
;
5139 /* Once past any colon, we're no longer a simple asm. */
5142 if ((!c_parser_next_token_is (parser
, CPP_COLON
)
5143 && !c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5148 /* For asm goto, we don't allow output operands, but reserve
5149 the slot for a future extension that does allow them. */
5151 outputs
= c_parser_asm_operands (parser
);
5154 inputs
= c_parser_asm_operands (parser
);
5157 clobbers
= c_parser_asm_clobbers (parser
);
5160 labels
= c_parser_asm_goto_operands (parser
);
5166 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5171 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5173 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5177 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
5178 c_parser_skip_to_end_of_block_or_statement (parser
);
5180 ret
= build_asm_stmt (quals
, build_asm_expr (asm_loc
, str
, outputs
, inputs
,
5181 clobbers
, labels
, simple
));
5184 parser
->lex_untranslated_string
= false;
5188 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5192 /* Parse asm operands, a GNU extension.
5196 asm-operands , asm-operand
5199 asm-string-literal ( expression )
5200 [ identifier ] asm-string-literal ( expression )
5204 c_parser_asm_operands (c_parser
*parser
)
5206 tree list
= NULL_TREE
;
5211 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
5213 c_parser_consume_token (parser
);
5214 if (c_parser_next_token_is (parser
, CPP_NAME
))
5216 tree id
= c_parser_peek_token (parser
)->value
;
5217 c_parser_consume_token (parser
);
5218 name
= build_string (IDENTIFIER_LENGTH (id
),
5219 IDENTIFIER_POINTER (id
));
5223 c_parser_error (parser
, "expected identifier");
5224 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
5227 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5232 str
= c_parser_asm_string_literal (parser
);
5233 if (str
== NULL_TREE
)
5235 parser
->lex_untranslated_string
= false;
5236 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5238 parser
->lex_untranslated_string
= true;
5241 expr
= c_parser_expression (parser
);
5242 mark_exp_read (expr
.value
);
5243 parser
->lex_untranslated_string
= true;
5244 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5246 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5249 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
5251 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5252 c_parser_consume_token (parser
);
5259 /* Parse asm clobbers, a GNU extension.
5263 asm-clobbers , asm-string-literal
5267 c_parser_asm_clobbers (c_parser
*parser
)
5269 tree list
= NULL_TREE
;
5272 tree str
= c_parser_asm_string_literal (parser
);
5274 list
= tree_cons (NULL_TREE
, str
, list
);
5277 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5278 c_parser_consume_token (parser
);
5285 /* Parse asm goto labels, a GNU extension.
5289 asm-goto-operands , identifier
5293 c_parser_asm_goto_operands (c_parser
*parser
)
5295 tree list
= NULL_TREE
;
5300 if (c_parser_next_token_is (parser
, CPP_NAME
))
5302 c_token
*tok
= c_parser_peek_token (parser
);
5304 label
= lookup_label_for_goto (tok
->location
, name
);
5305 c_parser_consume_token (parser
);
5306 TREE_USED (label
) = 1;
5310 c_parser_error (parser
, "expected identifier");
5314 name
= build_string (IDENTIFIER_LENGTH (name
),
5315 IDENTIFIER_POINTER (name
));
5316 list
= tree_cons (name
, label
, list
);
5317 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5318 c_parser_consume_token (parser
);
5320 return nreverse (list
);
5324 /* Parse an expression other than a compound expression; that is, an
5325 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
5326 NULL then it is an Objective-C message expression which is the
5327 primary-expression starting the expression as an initializer.
5329 assignment-expression:
5330 conditional-expression
5331 unary-expression assignment-operator assignment-expression
5333 assignment-operator: one of
5334 = *= /= %= += -= <<= >>= &= ^= |=
5336 In GNU C we accept any conditional expression on the LHS and
5337 diagnose the invalid lvalue rather than producing a syntax
5340 static struct c_expr
5341 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
5343 struct c_expr lhs
, rhs
, ret
;
5344 enum tree_code code
;
5345 location_t op_location
, exp_location
;
5346 gcc_assert (!after
|| c_dialect_objc ());
5347 lhs
= c_parser_conditional_expression (parser
, after
);
5348 op_location
= c_parser_peek_token (parser
)->location
;
5349 switch (c_parser_peek_token (parser
)->type
)
5358 code
= TRUNC_DIV_EXPR
;
5361 code
= TRUNC_MOD_EXPR
;
5376 code
= BIT_AND_EXPR
;
5379 code
= BIT_XOR_EXPR
;
5382 code
= BIT_IOR_EXPR
;
5387 c_parser_consume_token (parser
);
5388 exp_location
= c_parser_peek_token (parser
)->location
;
5389 rhs
= c_parser_expr_no_commas (parser
, NULL
);
5390 rhs
= default_function_array_read_conversion (exp_location
, rhs
);
5391 ret
.value
= build_modify_expr (op_location
, lhs
.value
, lhs
.original_type
,
5392 code
, exp_location
, rhs
.value
,
5394 if (code
== NOP_EXPR
)
5395 ret
.original_code
= MODIFY_EXPR
;
5398 TREE_NO_WARNING (ret
.value
) = 1;
5399 ret
.original_code
= ERROR_MARK
;
5401 ret
.original_type
= NULL
;
5405 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
5406 is not NULL then it is an Objective-C message expression which is
5407 the primary-expression starting the expression as an initializer.
5409 conditional-expression:
5410 logical-OR-expression
5411 logical-OR-expression ? expression : conditional-expression
5415 conditional-expression:
5416 logical-OR-expression ? : conditional-expression
5419 static struct c_expr
5420 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
5422 struct c_expr cond
, exp1
, exp2
, ret
;
5423 location_t cond_loc
, colon_loc
, middle_loc
;
5425 gcc_assert (!after
|| c_dialect_objc ());
5427 cond
= c_parser_binary_expression (parser
, after
, PREC_NONE
);
5429 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
5431 cond_loc
= c_parser_peek_token (parser
)->location
;
5432 cond
= default_function_array_read_conversion (cond_loc
, cond
);
5433 c_parser_consume_token (parser
);
5434 if (c_parser_next_token_is (parser
, CPP_COLON
))
5436 tree eptype
= NULL_TREE
;
5438 middle_loc
= c_parser_peek_token (parser
)->location
;
5439 pedwarn (middle_loc
, OPT_Wpedantic
,
5440 "ISO C forbids omitting the middle term of a ?: expression");
5441 warn_for_omitted_condop (middle_loc
, cond
.value
);
5442 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
5444 eptype
= TREE_TYPE (cond
.value
);
5445 cond
.value
= TREE_OPERAND (cond
.value
, 0);
5447 /* Make sure first operand is calculated only once. */
5448 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
5450 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
5451 exp1
.original_type
= NULL
;
5452 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
5453 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_true_node
;
5458 = c_objc_common_truthvalue_conversion
5459 (cond_loc
, default_conversion (cond
.value
));
5460 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_false_node
;
5461 exp1
= c_parser_expression_conv (parser
);
5462 mark_exp_read (exp1
.value
);
5463 c_inhibit_evaluation_warnings
+=
5464 ((cond
.value
== truthvalue_true_node
)
5465 - (cond
.value
== truthvalue_false_node
));
5468 colon_loc
= c_parser_peek_token (parser
)->location
;
5469 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
5471 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5472 ret
.value
= error_mark_node
;
5473 ret
.original_code
= ERROR_MARK
;
5474 ret
.original_type
= NULL
;
5478 location_t exp2_loc
= c_parser_peek_token (parser
)->location
;
5479 exp2
= c_parser_conditional_expression (parser
, NULL
);
5480 exp2
= default_function_array_read_conversion (exp2_loc
, exp2
);
5482 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5483 ret
.value
= build_conditional_expr (colon_loc
, cond
.value
,
5484 cond
.original_code
== C_MAYBE_CONST_EXPR
,
5485 exp1
.value
, exp1
.original_type
,
5486 exp2
.value
, exp2
.original_type
);
5487 ret
.original_code
= ERROR_MARK
;
5488 if (exp1
.value
== error_mark_node
|| exp2
.value
== error_mark_node
)
5489 ret
.original_type
= NULL
;
5494 /* If both sides are enum type, the default conversion will have
5495 made the type of the result be an integer type. We want to
5496 remember the enum types we started with. */
5497 t1
= exp1
.original_type
? exp1
.original_type
: TREE_TYPE (exp1
.value
);
5498 t2
= exp2
.original_type
? exp2
.original_type
: TREE_TYPE (exp2
.value
);
5499 ret
.original_type
= ((t1
!= error_mark_node
5500 && t2
!= error_mark_node
5501 && (TYPE_MAIN_VARIANT (t1
)
5502 == TYPE_MAIN_VARIANT (t2
)))
5509 /* Parse a binary expression; that is, a logical-OR-expression (C90
5510 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
5511 an Objective-C message expression which is the primary-expression
5512 starting the expression as an initializer. PREC is the starting
5513 precedence, usually PREC_NONE.
5515 multiplicative-expression:
5517 multiplicative-expression * cast-expression
5518 multiplicative-expression / cast-expression
5519 multiplicative-expression % cast-expression
5521 additive-expression:
5522 multiplicative-expression
5523 additive-expression + multiplicative-expression
5524 additive-expression - multiplicative-expression
5528 shift-expression << additive-expression
5529 shift-expression >> additive-expression
5531 relational-expression:
5533 relational-expression < shift-expression
5534 relational-expression > shift-expression
5535 relational-expression <= shift-expression
5536 relational-expression >= shift-expression
5538 equality-expression:
5539 relational-expression
5540 equality-expression == relational-expression
5541 equality-expression != relational-expression
5545 AND-expression & equality-expression
5547 exclusive-OR-expression:
5549 exclusive-OR-expression ^ AND-expression
5551 inclusive-OR-expression:
5552 exclusive-OR-expression
5553 inclusive-OR-expression | exclusive-OR-expression
5555 logical-AND-expression:
5556 inclusive-OR-expression
5557 logical-AND-expression && inclusive-OR-expression
5559 logical-OR-expression:
5560 logical-AND-expression
5561 logical-OR-expression || logical-AND-expression
5564 static struct c_expr
5565 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
,
5566 enum c_parser_prec prec
)
5568 /* A binary expression is parsed using operator-precedence parsing,
5569 with the operands being cast expressions. All the binary
5570 operators are left-associative. Thus a binary expression is of
5573 E0 op1 E1 op2 E2 ...
5575 which we represent on a stack. On the stack, the precedence
5576 levels are strictly increasing. When a new operator is
5577 encountered of higher precedence than that at the top of the
5578 stack, it is pushed; its LHS is the top expression, and its RHS
5579 is everything parsed until it is popped. When a new operator is
5580 encountered with precedence less than or equal to that at the top
5581 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
5582 by the result of the operation until the operator at the top of
5583 the stack has lower precedence than the new operator or there is
5584 only one element on the stack; then the top expression is the LHS
5585 of the new operator. In the case of logical AND and OR
5586 expressions, we also need to adjust c_inhibit_evaluation_warnings
5587 as appropriate when the operators are pushed and popped. */
5590 /* The expression at this stack level. */
5592 /* The precedence of the operator on its left, PREC_NONE at the
5593 bottom of the stack. */
5594 enum c_parser_prec prec
;
5595 /* The operation on its left. */
5597 /* The source location of this operation. */
5601 /* Location of the binary operator. */
5602 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
5605 switch (stack[sp].op) \
5607 case TRUTH_ANDIF_EXPR: \
5608 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5609 == truthvalue_false_node); \
5611 case TRUTH_ORIF_EXPR: \
5612 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5613 == truthvalue_true_node); \
5618 stack[sp - 1].expr \
5619 = default_function_array_read_conversion (stack[sp - 1].loc, \
5620 stack[sp - 1].expr); \
5622 = default_function_array_read_conversion (stack[sp].loc, \
5624 stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \
5626 stack[sp - 1].expr, \
5630 gcc_assert (!after
|| c_dialect_objc ());
5631 stack
[0].loc
= c_parser_peek_token (parser
)->location
;
5632 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
5633 stack
[0].prec
= prec
;
5637 enum c_parser_prec oprec
;
5638 enum tree_code ocode
;
5641 switch (c_parser_peek_token (parser
)->type
)
5649 ocode
= TRUNC_DIV_EXPR
;
5653 ocode
= TRUNC_MOD_EXPR
;
5665 ocode
= LSHIFT_EXPR
;
5669 ocode
= RSHIFT_EXPR
;
5683 case CPP_GREATER_EQ
:
5696 oprec
= PREC_BITAND
;
5697 ocode
= BIT_AND_EXPR
;
5700 oprec
= PREC_BITXOR
;
5701 ocode
= BIT_XOR_EXPR
;
5705 ocode
= BIT_IOR_EXPR
;
5708 oprec
= PREC_LOGAND
;
5709 ocode
= TRUTH_ANDIF_EXPR
;
5713 ocode
= TRUTH_ORIF_EXPR
;
5716 /* Not a binary operator, so end of the binary
5720 binary_loc
= c_parser_peek_token (parser
)->location
;
5721 while (oprec
<= stack
[sp
].prec
)
5727 c_parser_consume_token (parser
);
5730 case TRUTH_ANDIF_EXPR
:
5732 = default_function_array_read_conversion (stack
[sp
].loc
,
5734 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5735 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5736 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5737 == truthvalue_false_node
);
5739 case TRUTH_ORIF_EXPR
:
5741 = default_function_array_read_conversion (stack
[sp
].loc
,
5743 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5744 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5745 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5746 == truthvalue_true_node
);
5752 stack
[sp
].loc
= binary_loc
;
5753 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
5754 stack
[sp
].prec
= oprec
;
5755 stack
[sp
].op
= ocode
;
5756 stack
[sp
].loc
= binary_loc
;
5761 return stack
[0].expr
;
5765 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
5766 NULL then it is an Objective-C message expression which is the
5767 primary-expression starting the expression as an initializer.
5771 ( type-name ) unary-expression
5774 static struct c_expr
5775 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
5777 location_t cast_loc
= c_parser_peek_token (parser
)->location
;
5778 gcc_assert (!after
|| c_dialect_objc ());
5780 return c_parser_postfix_expression_after_primary (parser
,
5782 /* If the expression begins with a parenthesized type name, it may
5783 be either a cast or a compound literal; we need to see whether
5784 the next character is '{' to tell the difference. If not, it is
5785 an unary expression. Full detection of unknown typenames here
5786 would require a 3-token lookahead. */
5787 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5788 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5790 struct c_type_name
*type_name
;
5793 c_parser_consume_token (parser
);
5794 type_name
= c_parser_type_name (parser
);
5795 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5796 if (type_name
== NULL
)
5798 ret
.value
= error_mark_node
;
5799 ret
.original_code
= ERROR_MARK
;
5800 ret
.original_type
= NULL
;
5804 /* Save casted types in the function's used types hash table. */
5805 used_types_insert (type_name
->specs
->type
);
5807 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5808 return c_parser_postfix_expression_after_paren_type (parser
, type_name
,
5811 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
5812 expr
= c_parser_cast_expression (parser
, NULL
);
5813 expr
= default_function_array_read_conversion (expr_loc
, expr
);
5815 ret
.value
= c_cast_expr (cast_loc
, type_name
, expr
.value
);
5816 ret
.original_code
= ERROR_MARK
;
5817 ret
.original_type
= NULL
;
5821 return c_parser_unary_expression (parser
);
5824 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
5830 unary-operator cast-expression
5831 sizeof unary-expression
5832 sizeof ( type-name )
5834 unary-operator: one of
5840 __alignof__ unary-expression
5841 __alignof__ ( type-name )
5844 (C11 permits _Alignof with type names only.)
5846 unary-operator: one of
5847 __extension__ __real__ __imag__
5849 Transactional Memory:
5852 transaction-expression
5854 In addition, the GNU syntax treats ++ and -- as unary operators, so
5855 they may be applied to cast expressions with errors for non-lvalues
5858 static struct c_expr
5859 c_parser_unary_expression (c_parser
*parser
)
5862 struct c_expr ret
, op
;
5863 location_t op_loc
= c_parser_peek_token (parser
)->location
;
5865 ret
.original_code
= ERROR_MARK
;
5866 ret
.original_type
= NULL
;
5867 switch (c_parser_peek_token (parser
)->type
)
5870 c_parser_consume_token (parser
);
5871 exp_loc
= c_parser_peek_token (parser
)->location
;
5872 op
= c_parser_cast_expression (parser
, NULL
);
5873 op
= default_function_array_read_conversion (exp_loc
, op
);
5874 return parser_build_unary_op (op_loc
, PREINCREMENT_EXPR
, op
);
5875 case CPP_MINUS_MINUS
:
5876 c_parser_consume_token (parser
);
5877 exp_loc
= c_parser_peek_token (parser
)->location
;
5878 op
= c_parser_cast_expression (parser
, NULL
);
5879 op
= default_function_array_read_conversion (exp_loc
, op
);
5880 return parser_build_unary_op (op_loc
, PREDECREMENT_EXPR
, op
);
5882 c_parser_consume_token (parser
);
5883 op
= c_parser_cast_expression (parser
, NULL
);
5884 mark_exp_read (op
.value
);
5885 return parser_build_unary_op (op_loc
, ADDR_EXPR
, op
);
5887 c_parser_consume_token (parser
);
5888 exp_loc
= c_parser_peek_token (parser
)->location
;
5889 op
= c_parser_cast_expression (parser
, NULL
);
5890 op
= default_function_array_read_conversion (exp_loc
, op
);
5891 ret
.value
= build_indirect_ref (op_loc
, op
.value
, RO_UNARY_STAR
);
5894 if (!c_dialect_objc () && !in_system_header
)
5897 "traditional C rejects the unary plus operator");
5898 c_parser_consume_token (parser
);
5899 exp_loc
= c_parser_peek_token (parser
)->location
;
5900 op
= c_parser_cast_expression (parser
, NULL
);
5901 op
= default_function_array_read_conversion (exp_loc
, op
);
5902 return parser_build_unary_op (op_loc
, CONVERT_EXPR
, op
);
5904 c_parser_consume_token (parser
);
5905 exp_loc
= c_parser_peek_token (parser
)->location
;
5906 op
= c_parser_cast_expression (parser
, NULL
);
5907 op
= default_function_array_read_conversion (exp_loc
, op
);
5908 return parser_build_unary_op (op_loc
, NEGATE_EXPR
, op
);
5910 c_parser_consume_token (parser
);
5911 exp_loc
= c_parser_peek_token (parser
)->location
;
5912 op
= c_parser_cast_expression (parser
, NULL
);
5913 op
= default_function_array_read_conversion (exp_loc
, op
);
5914 return parser_build_unary_op (op_loc
, BIT_NOT_EXPR
, op
);
5916 c_parser_consume_token (parser
);
5917 exp_loc
= c_parser_peek_token (parser
)->location
;
5918 op
= c_parser_cast_expression (parser
, NULL
);
5919 op
= default_function_array_read_conversion (exp_loc
, op
);
5920 return parser_build_unary_op (op_loc
, TRUTH_NOT_EXPR
, op
);
5922 /* Refer to the address of a label as a pointer. */
5923 c_parser_consume_token (parser
);
5924 if (c_parser_next_token_is (parser
, CPP_NAME
))
5926 ret
.value
= finish_label_address_expr
5927 (c_parser_peek_token (parser
)->value
, op_loc
);
5928 c_parser_consume_token (parser
);
5932 c_parser_error (parser
, "expected identifier");
5933 ret
.value
= error_mark_node
;
5937 switch (c_parser_peek_token (parser
)->keyword
)
5940 return c_parser_sizeof_expression (parser
);
5942 return c_parser_alignof_expression (parser
);
5944 c_parser_consume_token (parser
);
5945 ext
= disable_extension_diagnostics ();
5946 ret
= c_parser_cast_expression (parser
, NULL
);
5947 restore_extension_diagnostics (ext
);
5950 c_parser_consume_token (parser
);
5951 exp_loc
= c_parser_peek_token (parser
)->location
;
5952 op
= c_parser_cast_expression (parser
, NULL
);
5953 op
= default_function_array_conversion (exp_loc
, op
);
5954 return parser_build_unary_op (op_loc
, REALPART_EXPR
, op
);
5956 c_parser_consume_token (parser
);
5957 exp_loc
= c_parser_peek_token (parser
)->location
;
5958 op
= c_parser_cast_expression (parser
, NULL
);
5959 op
= default_function_array_conversion (exp_loc
, op
);
5960 return parser_build_unary_op (op_loc
, IMAGPART_EXPR
, op
);
5961 case RID_TRANSACTION_ATOMIC
:
5962 case RID_TRANSACTION_RELAXED
:
5963 return c_parser_transaction_expression (parser
,
5964 c_parser_peek_token (parser
)->keyword
);
5966 return c_parser_postfix_expression (parser
);
5969 return c_parser_postfix_expression (parser
);
5973 /* Parse a sizeof expression. */
5975 static struct c_expr
5976 c_parser_sizeof_expression (c_parser
*parser
)
5979 location_t expr_loc
;
5980 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
5981 c_parser_consume_token (parser
);
5982 c_inhibit_evaluation_warnings
++;
5984 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5985 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5987 /* Either sizeof ( type-name ) or sizeof unary-expression
5988 starting with a compound literal. */
5989 struct c_type_name
*type_name
;
5990 c_parser_consume_token (parser
);
5991 expr_loc
= c_parser_peek_token (parser
)->location
;
5992 type_name
= c_parser_type_name (parser
);
5993 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5994 if (type_name
== NULL
)
5997 c_inhibit_evaluation_warnings
--;
5999 ret
.value
= error_mark_node
;
6000 ret
.original_code
= ERROR_MARK
;
6001 ret
.original_type
= NULL
;
6004 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6006 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6011 /* sizeof ( type-name ). */
6012 c_inhibit_evaluation_warnings
--;
6014 return c_expr_sizeof_type (expr_loc
, type_name
);
6018 expr_loc
= c_parser_peek_token (parser
)->location
;
6019 expr
= c_parser_unary_expression (parser
);
6021 c_inhibit_evaluation_warnings
--;
6023 mark_exp_read (expr
.value
);
6024 if (TREE_CODE (expr
.value
) == COMPONENT_REF
6025 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
6026 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
6027 return c_expr_sizeof_expr (expr_loc
, expr
);
6031 /* Parse an alignof expression. */
6033 static struct c_expr
6034 c_parser_alignof_expression (c_parser
*parser
)
6037 location_t loc
= c_parser_peek_token (parser
)->location
;
6038 tree alignof_spelling
= c_parser_peek_token (parser
)->value
;
6039 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
6040 /* A diagnostic is not required for the use of this identifier in
6041 the implementation namespace; only diagnose it for the C11
6042 spelling because of existing code using the other spellings. */
6044 && strcmp (IDENTIFIER_POINTER (alignof_spelling
), "_Alignof") == 0)
6047 pedwarn (loc
, OPT_Wpedantic
, "ISO C99 does not support %qE",
6050 pedwarn (loc
, OPT_Wpedantic
, "ISO C90 does not support %qE",
6053 c_parser_consume_token (parser
);
6054 c_inhibit_evaluation_warnings
++;
6056 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
6057 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
6059 /* Either __alignof__ ( type-name ) or __alignof__
6060 unary-expression starting with a compound literal. */
6062 struct c_type_name
*type_name
;
6064 c_parser_consume_token (parser
);
6065 loc
= c_parser_peek_token (parser
)->location
;
6066 type_name
= c_parser_type_name (parser
);
6067 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6068 if (type_name
== NULL
)
6071 c_inhibit_evaluation_warnings
--;
6073 ret
.value
= error_mark_node
;
6074 ret
.original_code
= ERROR_MARK
;
6075 ret
.original_type
= NULL
;
6078 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6080 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6085 /* alignof ( type-name ). */
6086 c_inhibit_evaluation_warnings
--;
6088 ret
.value
= c_alignof (loc
, groktypename (type_name
, NULL
, NULL
));
6089 ret
.original_code
= ERROR_MARK
;
6090 ret
.original_type
= NULL
;
6096 expr
= c_parser_unary_expression (parser
);
6098 mark_exp_read (expr
.value
);
6099 c_inhibit_evaluation_warnings
--;
6101 pedwarn (loc
, OPT_Wpedantic
, "ISO C does not allow %<%E (expression)%>",
6103 ret
.value
= c_alignof_expr (loc
, expr
.value
);
6104 ret
.original_code
= ERROR_MARK
;
6105 ret
.original_type
= NULL
;
6110 /* Helper function to read arguments of builtins which are interfaces
6111 for the middle-end nodes like COMPLEX_EXPR, VEC_PERM_EXPR and
6112 others. The name of the builtin is passed using BNAME parameter.
6113 Function returns true if there were no errors while parsing and
6114 stores the arguments in CEXPR_LIST. */
6116 c_parser_get_builtin_args (c_parser
*parser
, const char *bname
,
6117 vec
<c_expr_t
, va_gc
> **ret_cexpr_list
,
6120 location_t loc
= c_parser_peek_token (parser
)->location
;
6121 vec
<c_expr_t
, va_gc
> *cexpr_list
;
6123 bool saved_force_folding_builtin_constant_p
;
6125 *ret_cexpr_list
= NULL
;
6126 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
6128 error_at (loc
, "cannot take address of %qs", bname
);
6132 c_parser_consume_token (parser
);
6134 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6136 c_parser_consume_token (parser
);
6140 saved_force_folding_builtin_constant_p
6141 = force_folding_builtin_constant_p
;
6142 force_folding_builtin_constant_p
|= choose_expr_p
;
6143 expr
= c_parser_expr_no_commas (parser
, NULL
);
6144 force_folding_builtin_constant_p
6145 = saved_force_folding_builtin_constant_p
;
6146 vec_alloc (cexpr_list
, 1);
6147 C_EXPR_APPEND (cexpr_list
, expr
);
6148 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6150 c_parser_consume_token (parser
);
6151 expr
= c_parser_expr_no_commas (parser
, NULL
);
6152 C_EXPR_APPEND (cexpr_list
, expr
);
6155 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
6158 *ret_cexpr_list
= cexpr_list
;
6163 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
6167 postfix-expression [ expression ]
6168 postfix-expression ( argument-expression-list[opt] )
6169 postfix-expression . identifier
6170 postfix-expression -> identifier
6171 postfix-expression ++
6172 postfix-expression --
6173 ( type-name ) { initializer-list }
6174 ( type-name ) { initializer-list , }
6176 argument-expression-list:
6178 argument-expression-list , argument-expression
6190 (treated as a keyword in GNU C)
6193 ( compound-statement )
6194 __builtin_va_arg ( assignment-expression , type-name )
6195 __builtin_offsetof ( type-name , offsetof-member-designator )
6196 __builtin_choose_expr ( assignment-expression ,
6197 assignment-expression ,
6198 assignment-expression )
6199 __builtin_types_compatible_p ( type-name , type-name )
6200 __builtin_complex ( assignment-expression , assignment-expression )
6201 __builtin_shuffle ( assignment-expression , assignment-expression )
6202 __builtin_shuffle ( assignment-expression ,
6203 assignment-expression ,
6204 assignment-expression, )
6206 offsetof-member-designator:
6208 offsetof-member-designator . identifier
6209 offsetof-member-designator [ expression ]
6214 [ objc-receiver objc-message-args ]
6215 @selector ( objc-selector-arg )
6216 @protocol ( identifier )
6217 @encode ( type-name )
6219 Classname . identifier
6222 static struct c_expr
6223 c_parser_postfix_expression (c_parser
*parser
)
6225 struct c_expr expr
, e1
;
6226 struct c_type_name
*t1
, *t2
;
6227 location_t loc
= c_parser_peek_token (parser
)->location
;;
6228 expr
.original_code
= ERROR_MARK
;
6229 expr
.original_type
= NULL
;
6230 switch (c_parser_peek_token (parser
)->type
)
6233 expr
.value
= c_parser_peek_token (parser
)->value
;
6234 loc
= c_parser_peek_token (parser
)->location
;
6235 c_parser_consume_token (parser
);
6236 if (TREE_CODE (expr
.value
) == FIXED_CST
6237 && !targetm
.fixed_point_supported_p ())
6239 error_at (loc
, "fixed-point types not supported for this target");
6240 expr
.value
= error_mark_node
;
6247 expr
.value
= c_parser_peek_token (parser
)->value
;
6248 c_parser_consume_token (parser
);
6254 case CPP_UTF8STRING
:
6255 expr
.value
= c_parser_peek_token (parser
)->value
;
6256 expr
.original_code
= STRING_CST
;
6257 c_parser_consume_token (parser
);
6259 case CPP_OBJC_STRING
:
6260 gcc_assert (c_dialect_objc ());
6262 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
6263 c_parser_consume_token (parser
);
6266 switch (c_parser_peek_token (parser
)->id_kind
)
6270 tree id
= c_parser_peek_token (parser
)->value
;
6271 c_parser_consume_token (parser
);
6272 expr
.value
= build_external_ref (loc
, id
,
6273 (c_parser_peek_token (parser
)->type
6275 &expr
.original_type
);
6278 case C_ID_CLASSNAME
:
6280 /* Here we parse the Objective-C 2.0 Class.name dot
6282 tree class_name
= c_parser_peek_token (parser
)->value
;
6284 c_parser_consume_token (parser
);
6285 gcc_assert (c_dialect_objc ());
6286 if (!c_parser_require (parser
, CPP_DOT
, "expected %<.%>"))
6288 expr
.value
= error_mark_node
;
6291 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6293 c_parser_error (parser
, "expected identifier");
6294 expr
.value
= error_mark_node
;
6297 component
= c_parser_peek_token (parser
)->value
;
6298 c_parser_consume_token (parser
);
6299 expr
.value
= objc_build_class_component_ref (class_name
,
6304 c_parser_error (parser
, "expected expression");
6305 expr
.value
= error_mark_node
;
6309 case CPP_OPEN_PAREN
:
6310 /* A parenthesized expression, statement expression or compound
6312 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
6314 /* A statement expression. */
6316 location_t brace_loc
;
6317 c_parser_consume_token (parser
);
6318 brace_loc
= c_parser_peek_token (parser
)->location
;
6319 c_parser_consume_token (parser
);
6320 if (!building_stmt_list_p ())
6322 error_at (loc
, "braced-group within expression allowed "
6323 "only inside a function");
6324 parser
->error
= true;
6325 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
6326 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6327 expr
.value
= error_mark_node
;
6330 stmt
= c_begin_stmt_expr ();
6331 c_parser_compound_statement_nostart (parser
);
6332 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6334 pedwarn (loc
, OPT_Wpedantic
,
6335 "ISO C forbids braced-groups within expressions");
6336 expr
.value
= c_finish_stmt_expr (brace_loc
, stmt
);
6337 mark_exp_read (expr
.value
);
6339 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
6341 /* A compound literal. ??? Can we actually get here rather
6342 than going directly to
6343 c_parser_postfix_expression_after_paren_type from
6346 struct c_type_name
*type_name
;
6347 c_parser_consume_token (parser
);
6348 loc
= c_parser_peek_token (parser
)->location
;
6349 type_name
= c_parser_type_name (parser
);
6350 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6352 if (type_name
== NULL
)
6354 expr
.value
= error_mark_node
;
6357 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6363 /* A parenthesized expression. */
6364 c_parser_consume_token (parser
);
6365 expr
= c_parser_expression (parser
);
6366 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
6367 TREE_NO_WARNING (expr
.value
) = 1;
6368 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
6369 expr
.original_code
= ERROR_MARK
;
6370 /* Don't change EXPR.ORIGINAL_TYPE. */
6371 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6376 switch (c_parser_peek_token (parser
)->keyword
)
6378 case RID_FUNCTION_NAME
:
6379 case RID_PRETTY_FUNCTION_NAME
:
6380 case RID_C99_FUNCTION_NAME
:
6381 expr
.value
= fname_decl (loc
,
6382 c_parser_peek_token (parser
)->keyword
,
6383 c_parser_peek_token (parser
)->value
);
6384 c_parser_consume_token (parser
);
6387 c_parser_consume_token (parser
);
6388 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6390 expr
.value
= error_mark_node
;
6393 e1
= c_parser_expr_no_commas (parser
, NULL
);
6394 mark_exp_read (e1
.value
);
6395 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
6396 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6398 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6399 expr
.value
= error_mark_node
;
6402 loc
= c_parser_peek_token (parser
)->location
;
6403 t1
= c_parser_type_name (parser
);
6404 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6408 expr
.value
= error_mark_node
;
6412 tree type_expr
= NULL_TREE
;
6413 expr
.value
= c_build_va_arg (loc
, e1
.value
,
6414 groktypename (t1
, &type_expr
, NULL
));
6417 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
6418 TREE_TYPE (expr
.value
), type_expr
,
6420 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
6425 c_parser_consume_token (parser
);
6426 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6428 expr
.value
= error_mark_node
;
6431 t1
= c_parser_type_name (parser
);
6433 parser
->error
= true;
6434 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6435 gcc_assert (parser
->error
);
6438 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6439 expr
.value
= error_mark_node
;
6444 tree type
= groktypename (t1
, NULL
, NULL
);
6446 if (type
== error_mark_node
)
6447 offsetof_ref
= error_mark_node
;
6450 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
6451 SET_EXPR_LOCATION (offsetof_ref
, loc
);
6453 /* Parse the second argument to __builtin_offsetof. We
6454 must have one identifier, and beyond that we want to
6455 accept sub structure and sub array references. */
6456 if (c_parser_next_token_is (parser
, CPP_NAME
))
6458 offsetof_ref
= build_component_ref
6459 (loc
, offsetof_ref
, c_parser_peek_token (parser
)->value
);
6460 c_parser_consume_token (parser
);
6461 while (c_parser_next_token_is (parser
, CPP_DOT
)
6462 || c_parser_next_token_is (parser
,
6464 || c_parser_next_token_is (parser
,
6467 if (c_parser_next_token_is (parser
, CPP_DEREF
))
6469 loc
= c_parser_peek_token (parser
)->location
;
6470 offsetof_ref
= build_array_ref (loc
,
6475 else if (c_parser_next_token_is (parser
, CPP_DOT
))
6478 c_parser_consume_token (parser
);
6479 if (c_parser_next_token_is_not (parser
,
6482 c_parser_error (parser
, "expected identifier");
6485 offsetof_ref
= build_component_ref
6487 c_parser_peek_token (parser
)->value
);
6488 c_parser_consume_token (parser
);
6493 loc
= c_parser_peek_token (parser
)->location
;
6494 c_parser_consume_token (parser
);
6495 idx
= c_parser_expression (parser
).value
;
6496 idx
= c_fully_fold (idx
, false, NULL
);
6497 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6499 offsetof_ref
= build_array_ref (loc
, offsetof_ref
, idx
);
6504 c_parser_error (parser
, "expected identifier");
6505 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6507 expr
.value
= fold_offsetof (offsetof_ref
);
6510 case RID_CHOOSE_EXPR
:
6512 vec
<c_expr_t
, va_gc
> *cexpr_list
;
6513 c_expr_t
*e1_p
, *e2_p
, *e3_p
;
6516 c_parser_consume_token (parser
);
6517 if (!c_parser_get_builtin_args (parser
,
6518 "__builtin_choose_expr",
6521 expr
.value
= error_mark_node
;
6525 if (vec_safe_length (cexpr_list
) != 3)
6527 error_at (loc
, "wrong number of arguments to "
6528 "%<__builtin_choose_expr%>");
6529 expr
.value
= error_mark_node
;
6533 e1_p
= &(*cexpr_list
)[0];
6534 e2_p
= &(*cexpr_list
)[1];
6535 e3_p
= &(*cexpr_list
)[2];
6538 mark_exp_read (e2_p
->value
);
6539 mark_exp_read (e3_p
->value
);
6540 if (TREE_CODE (c
) != INTEGER_CST
6541 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
6543 "first argument to %<__builtin_choose_expr%> not"
6545 constant_expression_warning (c
);
6546 expr
= integer_zerop (c
) ? *e3_p
: *e2_p
;
6549 case RID_TYPES_COMPATIBLE_P
:
6550 c_parser_consume_token (parser
);
6551 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6553 expr
.value
= error_mark_node
;
6556 t1
= c_parser_type_name (parser
);
6559 expr
.value
= error_mark_node
;
6562 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6564 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6565 expr
.value
= error_mark_node
;
6568 t2
= c_parser_type_name (parser
);
6571 expr
.value
= error_mark_node
;
6574 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6578 e1
= groktypename (t1
, NULL
, NULL
);
6579 e2
= groktypename (t2
, NULL
, NULL
);
6580 if (e1
== error_mark_node
|| e2
== error_mark_node
)
6582 expr
.value
= error_mark_node
;
6586 e1
= TYPE_MAIN_VARIANT (e1
);
6587 e2
= TYPE_MAIN_VARIANT (e2
);
6590 = comptypes (e1
, e2
) ? integer_one_node
: integer_zero_node
;
6593 case RID_BUILTIN_COMPLEX
:
6595 vec
<c_expr_t
, va_gc
> *cexpr_list
;
6596 c_expr_t
*e1_p
, *e2_p
;
6598 c_parser_consume_token (parser
);
6599 if (!c_parser_get_builtin_args (parser
,
6600 "__builtin_complex",
6601 &cexpr_list
, false))
6603 expr
.value
= error_mark_node
;
6607 if (vec_safe_length (cexpr_list
) != 2)
6609 error_at (loc
, "wrong number of arguments to "
6610 "%<__builtin_complex%>");
6611 expr
.value
= error_mark_node
;
6615 e1_p
= &(*cexpr_list
)[0];
6616 e2_p
= &(*cexpr_list
)[1];
6618 mark_exp_read (e1_p
->value
);
6619 if (TREE_CODE (e1_p
->value
) == EXCESS_PRECISION_EXPR
)
6620 e1_p
->value
= convert (TREE_TYPE (e1_p
->value
),
6621 TREE_OPERAND (e1_p
->value
, 0));
6622 mark_exp_read (e2_p
->value
);
6623 if (TREE_CODE (e2_p
->value
) == EXCESS_PRECISION_EXPR
)
6624 e2_p
->value
= convert (TREE_TYPE (e2_p
->value
),
6625 TREE_OPERAND (e2_p
->value
, 0));
6626 if (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (e1_p
->value
))
6627 || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e1_p
->value
))
6628 || !SCALAR_FLOAT_TYPE_P (TREE_TYPE (e2_p
->value
))
6629 || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e2_p
->value
)))
6631 error_at (loc
, "%<__builtin_complex%> operand "
6632 "not of real binary floating-point type");
6633 expr
.value
= error_mark_node
;
6636 if (TYPE_MAIN_VARIANT (TREE_TYPE (e1_p
->value
))
6637 != TYPE_MAIN_VARIANT (TREE_TYPE (e2_p
->value
)))
6640 "%<__builtin_complex%> operands of different types");
6641 expr
.value
= error_mark_node
;
6645 pedwarn (loc
, OPT_Wpedantic
,
6646 "ISO C90 does not support complex types");
6647 expr
.value
= build2 (COMPLEX_EXPR
,
6650 (TREE_TYPE (e1_p
->value
))),
6651 e1_p
->value
, e2_p
->value
);
6654 case RID_BUILTIN_SHUFFLE
:
6656 vec
<c_expr_t
, va_gc
> *cexpr_list
;
6660 c_parser_consume_token (parser
);
6661 if (!c_parser_get_builtin_args (parser
,
6662 "__builtin_shuffle",
6663 &cexpr_list
, false))
6665 expr
.value
= error_mark_node
;
6669 FOR_EACH_VEC_SAFE_ELT (cexpr_list
, i
, p
)
6670 mark_exp_read (p
->value
);
6672 if (vec_safe_length (cexpr_list
) == 2)
6674 c_build_vec_perm_expr
6675 (loc
, (*cexpr_list
)[0].value
,
6676 NULL_TREE
, (*cexpr_list
)[1].value
);
6678 else if (vec_safe_length (cexpr_list
) == 3)
6680 c_build_vec_perm_expr
6681 (loc
, (*cexpr_list
)[0].value
,
6682 (*cexpr_list
)[1].value
,
6683 (*cexpr_list
)[2].value
);
6686 error_at (loc
, "wrong number of arguments to "
6687 "%<__builtin_shuffle%>");
6688 expr
.value
= error_mark_node
;
6692 case RID_AT_SELECTOR
:
6693 gcc_assert (c_dialect_objc ());
6694 c_parser_consume_token (parser
);
6695 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6697 expr
.value
= error_mark_node
;
6701 tree sel
= c_parser_objc_selector_arg (parser
);
6702 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6704 expr
.value
= objc_build_selector_expr (loc
, sel
);
6707 case RID_AT_PROTOCOL
:
6708 gcc_assert (c_dialect_objc ());
6709 c_parser_consume_token (parser
);
6710 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6712 expr
.value
= error_mark_node
;
6715 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6717 c_parser_error (parser
, "expected identifier");
6718 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6719 expr
.value
= error_mark_node
;
6723 tree id
= c_parser_peek_token (parser
)->value
;
6724 c_parser_consume_token (parser
);
6725 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6727 expr
.value
= objc_build_protocol_expr (id
);
6731 /* Extension to support C-structures in the archiver. */
6732 gcc_assert (c_dialect_objc ());
6733 c_parser_consume_token (parser
);
6734 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6736 expr
.value
= error_mark_node
;
6739 t1
= c_parser_type_name (parser
);
6742 expr
.value
= error_mark_node
;
6743 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6746 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6749 tree type
= groktypename (t1
, NULL
, NULL
);
6750 expr
.value
= objc_build_encode_expr (type
);
6754 c_parser_error (parser
, "expected expression");
6755 expr
.value
= error_mark_node
;
6759 case CPP_OPEN_SQUARE
:
6760 if (c_dialect_objc ())
6762 tree receiver
, args
;
6763 c_parser_consume_token (parser
);
6764 receiver
= c_parser_objc_receiver (parser
);
6765 args
= c_parser_objc_message_args (parser
);
6766 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6768 expr
.value
= objc_build_message_expr (receiver
, args
);
6771 /* Else fall through to report error. */
6773 c_parser_error (parser
, "expected expression");
6774 expr
.value
= error_mark_node
;
6777 return c_parser_postfix_expression_after_primary (parser
, loc
, expr
);
6780 /* Parse a postfix expression after a parenthesized type name: the
6781 brace-enclosed initializer of a compound literal, possibly followed
6782 by some postfix operators. This is separate because it is not
6783 possible to tell until after the type name whether a cast
6784 expression has a cast or a compound literal, or whether the operand
6785 of sizeof is a parenthesized type name or starts with a compound
6786 literal. TYPE_LOC is the location where TYPE_NAME starts--the
6787 location of the first token after the parentheses around the type
6790 static struct c_expr
6791 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
6792 struct c_type_name
*type_name
,
6793 location_t type_loc
)
6799 location_t start_loc
;
6800 tree type_expr
= NULL_TREE
;
6801 bool type_expr_const
= true;
6802 check_compound_literal_type (type_loc
, type_name
);
6803 start_init (NULL_TREE
, NULL
, 0);
6804 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
6805 start_loc
= c_parser_peek_token (parser
)->location
;
6806 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
6808 error_at (type_loc
, "compound literal has variable size");
6809 type
= error_mark_node
;
6811 init
= c_parser_braced_init (parser
, type
, false);
6813 maybe_warn_string_init (type
, init
);
6815 if (type
!= error_mark_node
6816 && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type
))
6817 && current_function_decl
)
6819 error ("compound literal qualified by address-space qualifier");
6820 type
= error_mark_node
;
6824 pedwarn (start_loc
, OPT_Wpedantic
, "ISO C90 forbids compound literals");
6825 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
6826 ? CONSTRUCTOR_NON_CONST (init
.value
)
6827 : init
.original_code
== C_MAYBE_CONST_EXPR
);
6828 non_const
|= !type_expr_const
;
6829 expr
.value
= build_compound_literal (start_loc
, type
, init
.value
, non_const
);
6830 expr
.original_code
= ERROR_MARK
;
6831 expr
.original_type
= NULL
;
6834 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
6836 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
6837 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
6841 gcc_assert (!non_const
);
6842 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
6843 type_expr
, expr
.value
);
6846 return c_parser_postfix_expression_after_primary (parser
, start_loc
, expr
);
6849 /* Callback function for sizeof_pointer_memaccess_warning to compare
6853 sizeof_ptr_memacc_comptypes (tree type1
, tree type2
)
6855 return comptypes (type1
, type2
) == 1;
6858 /* Parse a postfix expression after the initial primary or compound
6859 literal; that is, parse a series of postfix operators.
6861 EXPR_LOC is the location of the primary expression. */
6863 static struct c_expr
6864 c_parser_postfix_expression_after_primary (c_parser
*parser
,
6865 location_t expr_loc
,
6868 struct c_expr orig_expr
;
6870 location_t sizeof_arg_loc
[3];
6873 vec
<tree
, va_gc
> *exprlist
;
6874 vec
<tree
, va_gc
> *origtypes
= NULL
;
6877 location_t op_loc
= c_parser_peek_token (parser
)->location
;
6878 switch (c_parser_peek_token (parser
)->type
)
6880 case CPP_OPEN_SQUARE
:
6881 /* Array reference. */
6882 c_parser_consume_token (parser
);
6883 idx
= c_parser_expression (parser
).value
;
6884 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6886 expr
.value
= build_array_ref (op_loc
, expr
.value
, idx
);
6887 expr
.original_code
= ERROR_MARK
;
6888 expr
.original_type
= NULL
;
6890 case CPP_OPEN_PAREN
:
6891 /* Function call. */
6892 c_parser_consume_token (parser
);
6893 for (i
= 0; i
< 3; i
++)
6895 sizeof_arg
[i
] = NULL_TREE
;
6896 sizeof_arg_loc
[i
] = UNKNOWN_LOCATION
;
6898 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6901 exprlist
= c_parser_expr_list (parser
, true, false, &origtypes
,
6902 sizeof_arg_loc
, sizeof_arg
);
6903 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6906 mark_exp_read (expr
.value
);
6907 if (warn_sizeof_pointer_memaccess
)
6908 sizeof_pointer_memaccess_warning (sizeof_arg_loc
,
6909 expr
.value
, exprlist
,
6911 sizeof_ptr_memacc_comptypes
);
6912 /* FIXME diagnostics: Ideally we want the FUNCNAME, not the
6913 "(" after the FUNCNAME, which is what we have now. */
6914 expr
.value
= build_function_call_vec (op_loc
, expr
.value
, exprlist
,
6916 expr
.original_code
= ERROR_MARK
;
6917 if (TREE_CODE (expr
.value
) == INTEGER_CST
6918 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
6919 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
6920 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
6921 expr
.original_code
= C_MAYBE_CONST_EXPR
;
6922 expr
.original_type
= NULL
;
6925 release_tree_vector (exprlist
);
6926 release_tree_vector (origtypes
);
6930 /* Structure element reference. */
6931 c_parser_consume_token (parser
);
6932 expr
= default_function_array_conversion (expr_loc
, expr
);
6933 if (c_parser_next_token_is (parser
, CPP_NAME
))
6934 ident
= c_parser_peek_token (parser
)->value
;
6937 c_parser_error (parser
, "expected identifier");
6938 expr
.value
= error_mark_node
;
6939 expr
.original_code
= ERROR_MARK
;
6940 expr
.original_type
= NULL
;
6943 c_parser_consume_token (parser
);
6944 expr
.value
= build_component_ref (op_loc
, expr
.value
, ident
);
6945 expr
.original_code
= ERROR_MARK
;
6946 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6947 expr
.original_type
= NULL
;
6950 /* Remember the original type of a bitfield. */
6951 tree field
= TREE_OPERAND (expr
.value
, 1);
6952 if (TREE_CODE (field
) != FIELD_DECL
)
6953 expr
.original_type
= NULL
;
6955 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6959 /* Structure element reference. */
6960 c_parser_consume_token (parser
);
6961 expr
= default_function_array_conversion (expr_loc
, expr
);
6962 if (c_parser_next_token_is (parser
, CPP_NAME
))
6963 ident
= c_parser_peek_token (parser
)->value
;
6966 c_parser_error (parser
, "expected identifier");
6967 expr
.value
= error_mark_node
;
6968 expr
.original_code
= ERROR_MARK
;
6969 expr
.original_type
= NULL
;
6972 c_parser_consume_token (parser
);
6973 expr
.value
= build_component_ref (op_loc
,
6974 build_indirect_ref (op_loc
,
6978 expr
.original_code
= ERROR_MARK
;
6979 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6980 expr
.original_type
= NULL
;
6983 /* Remember the original type of a bitfield. */
6984 tree field
= TREE_OPERAND (expr
.value
, 1);
6985 if (TREE_CODE (field
) != FIELD_DECL
)
6986 expr
.original_type
= NULL
;
6988 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6992 /* Postincrement. */
6993 c_parser_consume_token (parser
);
6994 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6995 expr
.value
= build_unary_op (op_loc
,
6996 POSTINCREMENT_EXPR
, expr
.value
, 0);
6997 expr
.original_code
= ERROR_MARK
;
6998 expr
.original_type
= NULL
;
7000 case CPP_MINUS_MINUS
:
7001 /* Postdecrement. */
7002 c_parser_consume_token (parser
);
7003 expr
= default_function_array_read_conversion (expr_loc
, expr
);
7004 expr
.value
= build_unary_op (op_loc
,
7005 POSTDECREMENT_EXPR
, expr
.value
, 0);
7006 expr
.original_code
= ERROR_MARK
;
7007 expr
.original_type
= NULL
;
7015 /* Parse an expression (C90 6.3.17, C99 6.5.17).
7018 assignment-expression
7019 expression , assignment-expression
7022 static struct c_expr
7023 c_parser_expression (c_parser
*parser
)
7026 expr
= c_parser_expr_no_commas (parser
, NULL
);
7027 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7031 location_t loc
= c_parser_peek_token (parser
)->location
;
7032 location_t expr_loc
;
7033 c_parser_consume_token (parser
);
7034 expr_loc
= c_parser_peek_token (parser
)->location
;
7035 lhsval
= expr
.value
;
7036 while (TREE_CODE (lhsval
) == COMPOUND_EXPR
)
7037 lhsval
= TREE_OPERAND (lhsval
, 1);
7038 if (DECL_P (lhsval
) || handled_component_p (lhsval
))
7039 mark_exp_read (lhsval
);
7040 next
= c_parser_expr_no_commas (parser
, NULL
);
7041 next
= default_function_array_conversion (expr_loc
, next
);
7042 expr
.value
= build_compound_expr (loc
, expr
.value
, next
.value
);
7043 expr
.original_code
= COMPOUND_EXPR
;
7044 expr
.original_type
= next
.original_type
;
7049 /* Parse an expression and convert functions or arrays to
7052 static struct c_expr
7053 c_parser_expression_conv (c_parser
*parser
)
7056 location_t loc
= c_parser_peek_token (parser
)->location
;
7057 expr
= c_parser_expression (parser
);
7058 expr
= default_function_array_conversion (loc
, expr
);
7062 /* Parse a non-empty list of expressions. If CONVERT_P, convert
7063 functions and arrays to pointers. If FOLD_P, fold the expressions.
7066 assignment-expression
7067 nonempty-expr-list , assignment-expression
7070 static vec
<tree
, va_gc
> *
7071 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
,
7072 vec
<tree
, va_gc
> **p_orig_types
,
7073 location_t
*sizeof_arg_loc
, tree
*sizeof_arg
)
7075 vec
<tree
, va_gc
> *ret
;
7076 vec
<tree
, va_gc
> *orig_types
;
7078 location_t loc
= c_parser_peek_token (parser
)->location
;
7079 location_t cur_sizeof_arg_loc
= UNKNOWN_LOCATION
;
7080 unsigned int idx
= 0;
7082 ret
= make_tree_vector ();
7083 if (p_orig_types
== NULL
)
7086 orig_types
= make_tree_vector ();
7088 if (sizeof_arg
!= NULL
7089 && c_parser_next_token_is_keyword (parser
, RID_SIZEOF
))
7090 cur_sizeof_arg_loc
= c_parser_peek_2nd_token (parser
)->location
;
7091 expr
= c_parser_expr_no_commas (parser
, NULL
);
7093 expr
= default_function_array_read_conversion (loc
, expr
);
7095 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
7096 ret
->quick_push (expr
.value
);
7098 orig_types
->quick_push (expr
.original_type
);
7099 if (sizeof_arg
!= NULL
7100 && cur_sizeof_arg_loc
!= UNKNOWN_LOCATION
7101 && expr
.original_code
== SIZEOF_EXPR
)
7103 sizeof_arg
[0] = c_last_sizeof_arg
;
7104 sizeof_arg_loc
[0] = cur_sizeof_arg_loc
;
7106 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7108 c_parser_consume_token (parser
);
7109 loc
= c_parser_peek_token (parser
)->location
;
7110 if (sizeof_arg
!= NULL
7111 && c_parser_next_token_is_keyword (parser
, RID_SIZEOF
))
7112 cur_sizeof_arg_loc
= c_parser_peek_2nd_token (parser
)->location
;
7114 cur_sizeof_arg_loc
= UNKNOWN_LOCATION
;
7115 expr
= c_parser_expr_no_commas (parser
, NULL
);
7117 expr
= default_function_array_read_conversion (loc
, expr
);
7119 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
7120 vec_safe_push (ret
, expr
.value
);
7122 vec_safe_push (orig_types
, expr
.original_type
);
7124 && sizeof_arg
!= NULL
7125 && cur_sizeof_arg_loc
!= UNKNOWN_LOCATION
7126 && expr
.original_code
== SIZEOF_EXPR
)
7128 sizeof_arg
[idx
] = c_last_sizeof_arg
;
7129 sizeof_arg_loc
[idx
] = cur_sizeof_arg_loc
;
7133 *p_orig_types
= orig_types
;
7137 /* Parse Objective-C-specific constructs. */
7139 /* Parse an objc-class-definition.
7141 objc-class-definition:
7142 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
7143 objc-class-instance-variables[opt] objc-methodprotolist @end
7144 @implementation identifier objc-superclass[opt]
7145 objc-class-instance-variables[opt]
7146 @interface identifier ( identifier ) objc-protocol-refs[opt]
7147 objc-methodprotolist @end
7148 @interface identifier ( ) objc-protocol-refs[opt]
7149 objc-methodprotolist @end
7150 @implementation identifier ( identifier )
7155 "@interface identifier (" must start "@interface identifier (
7156 identifier ) ...": objc-methodprotolist in the first production may
7157 not start with a parenthesized identifier as a declarator of a data
7158 definition with no declaration specifiers if the objc-superclass,
7159 objc-protocol-refs and objc-class-instance-variables are omitted. */
7162 c_parser_objc_class_definition (c_parser
*parser
, tree attributes
)
7167 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
7169 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
7174 c_parser_consume_token (parser
);
7175 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7177 c_parser_error (parser
, "expected identifier");
7180 id1
= c_parser_peek_token (parser
)->value
;
7181 c_parser_consume_token (parser
);
7182 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7184 /* We have a category or class extension. */
7186 tree proto
= NULL_TREE
;
7187 c_parser_consume_token (parser
);
7188 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7190 if (iface_p
&& c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
7192 /* We have a class extension. */
7197 c_parser_error (parser
, "expected identifier or %<)%>");
7198 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
7204 id2
= c_parser_peek_token (parser
)->value
;
7205 c_parser_consume_token (parser
);
7207 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7210 objc_start_category_implementation (id1
, id2
);
7213 if (c_parser_next_token_is (parser
, CPP_LESS
))
7214 proto
= c_parser_objc_protocol_refs (parser
);
7215 objc_start_category_interface (id1
, id2
, proto
, attributes
);
7216 c_parser_objc_methodprotolist (parser
);
7217 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7218 objc_finish_interface ();
7221 if (c_parser_next_token_is (parser
, CPP_COLON
))
7223 c_parser_consume_token (parser
);
7224 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7226 c_parser_error (parser
, "expected identifier");
7229 superclass
= c_parser_peek_token (parser
)->value
;
7230 c_parser_consume_token (parser
);
7233 superclass
= NULL_TREE
;
7236 tree proto
= NULL_TREE
;
7237 if (c_parser_next_token_is (parser
, CPP_LESS
))
7238 proto
= c_parser_objc_protocol_refs (parser
);
7239 objc_start_class_interface (id1
, superclass
, proto
, attributes
);
7242 objc_start_class_implementation (id1
, superclass
);
7243 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7244 c_parser_objc_class_instance_variables (parser
);
7247 objc_continue_interface ();
7248 c_parser_objc_methodprotolist (parser
);
7249 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7250 objc_finish_interface ();
7254 objc_continue_implementation ();
7259 /* Parse objc-class-instance-variables.
7261 objc-class-instance-variables:
7262 { objc-instance-variable-decl-list[opt] }
7264 objc-instance-variable-decl-list:
7265 objc-visibility-spec
7266 objc-instance-variable-decl ;
7268 objc-instance-variable-decl-list objc-visibility-spec
7269 objc-instance-variable-decl-list objc-instance-variable-decl ;
7270 objc-instance-variable-decl-list ;
7272 objc-visibility-spec:
7277 objc-instance-variable-decl:
7282 c_parser_objc_class_instance_variables (c_parser
*parser
)
7284 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
7285 c_parser_consume_token (parser
);
7286 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
7289 /* Parse any stray semicolon. */
7290 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7292 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
7294 c_parser_consume_token (parser
);
7297 /* Stop if at the end of the instance variables. */
7298 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7300 c_parser_consume_token (parser
);
7303 /* Parse any objc-visibility-spec. */
7304 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
7306 c_parser_consume_token (parser
);
7307 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE
);
7310 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
7312 c_parser_consume_token (parser
);
7313 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED
);
7316 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
7318 c_parser_consume_token (parser
);
7319 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC
);
7322 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PACKAGE
))
7324 c_parser_consume_token (parser
);
7325 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE
);
7328 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
7330 c_parser_pragma (parser
, pragma_external
);
7334 /* Parse some comma-separated declarations. */
7335 decls
= c_parser_struct_declaration (parser
);
7338 /* There is a syntax error. We want to skip the offending
7339 tokens up to the next ';' (included) or '}'
7342 /* First, skip manually a ')' or ']'. This is because they
7343 reduce the nesting level, so c_parser_skip_until_found()
7344 wouldn't be able to skip past them. */
7345 c_token
*token
= c_parser_peek_token (parser
);
7346 if (token
->type
== CPP_CLOSE_PAREN
|| token
->type
== CPP_CLOSE_SQUARE
)
7347 c_parser_consume_token (parser
);
7349 /* Then, do the standard skipping. */
7350 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7352 /* We hopefully recovered. Start normal parsing again. */
7353 parser
->error
= false;
7358 /* Comma-separated instance variables are chained together
7359 in reverse order; add them one by one. */
7360 tree ivar
= nreverse (decls
);
7361 for (; ivar
; ivar
= DECL_CHAIN (ivar
))
7362 objc_add_instance_variable (copy_node (ivar
));
7364 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7368 /* Parse an objc-class-declaration.
7370 objc-class-declaration:
7371 @class identifier-list ;
7375 c_parser_objc_class_declaration (c_parser
*parser
)
7377 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
7378 c_parser_consume_token (parser
);
7379 /* Any identifiers, including those declared as type names, are OK
7384 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7386 c_parser_error (parser
, "expected identifier");
7387 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7388 parser
->error
= false;
7391 id
= c_parser_peek_token (parser
)->value
;
7392 objc_declare_class (id
);
7393 c_parser_consume_token (parser
);
7394 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7395 c_parser_consume_token (parser
);
7399 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7402 /* Parse an objc-alias-declaration.
7404 objc-alias-declaration:
7405 @compatibility_alias identifier identifier ;
7409 c_parser_objc_alias_declaration (c_parser
*parser
)
7412 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
7413 c_parser_consume_token (parser
);
7414 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7416 c_parser_error (parser
, "expected identifier");
7417 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7420 id1
= c_parser_peek_token (parser
)->value
;
7421 c_parser_consume_token (parser
);
7422 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7424 c_parser_error (parser
, "expected identifier");
7425 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7428 id2
= c_parser_peek_token (parser
)->value
;
7429 c_parser_consume_token (parser
);
7430 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7431 objc_declare_alias (id1
, id2
);
7434 /* Parse an objc-protocol-definition.
7436 objc-protocol-definition:
7437 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
7438 @protocol identifier-list ;
7440 "@protocol identifier ;" should be resolved as "@protocol
7441 identifier-list ;": objc-methodprotolist may not start with a
7442 semicolon in the first alternative if objc-protocol-refs are
7446 c_parser_objc_protocol_definition (c_parser
*parser
, tree attributes
)
7448 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
7450 c_parser_consume_token (parser
);
7451 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7453 c_parser_error (parser
, "expected identifier");
7456 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
7457 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
7459 /* Any identifiers, including those declared as type names, are
7464 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7466 c_parser_error (parser
, "expected identifier");
7469 id
= c_parser_peek_token (parser
)->value
;
7470 objc_declare_protocol (id
, attributes
);
7471 c_parser_consume_token (parser
);
7472 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7473 c_parser_consume_token (parser
);
7477 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7481 tree id
= c_parser_peek_token (parser
)->value
;
7482 tree proto
= NULL_TREE
;
7483 c_parser_consume_token (parser
);
7484 if (c_parser_next_token_is (parser
, CPP_LESS
))
7485 proto
= c_parser_objc_protocol_refs (parser
);
7486 parser
->objc_pq_context
= true;
7487 objc_start_protocol (id
, proto
, attributes
);
7488 c_parser_objc_methodprotolist (parser
);
7489 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7490 parser
->objc_pq_context
= false;
7491 objc_finish_interface ();
7495 /* Parse an objc-method-type.
7501 Return true if it is a class method (+) and false if it is
7502 an instance method (-).
7505 c_parser_objc_method_type (c_parser
*parser
)
7507 switch (c_parser_peek_token (parser
)->type
)
7510 c_parser_consume_token (parser
);
7513 c_parser_consume_token (parser
);
7520 /* Parse an objc-method-definition.
7522 objc-method-definition:
7523 objc-method-type objc-method-decl ;[opt] compound-statement
7527 c_parser_objc_method_definition (c_parser
*parser
)
7529 bool is_class_method
= c_parser_objc_method_type (parser
);
7530 tree decl
, attributes
= NULL_TREE
, expr
= NULL_TREE
;
7531 parser
->objc_pq_context
= true;
7532 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
,
7534 if (decl
== error_mark_node
)
7535 return; /* Bail here. */
7537 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7539 c_parser_consume_token (parser
);
7540 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
7541 "extra semicolon in method definition specified");
7544 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7546 c_parser_error (parser
, "expected %<{%>");
7550 parser
->objc_pq_context
= false;
7551 if (objc_start_method_definition (is_class_method
, decl
, attributes
, expr
))
7553 add_stmt (c_parser_compound_statement (parser
));
7554 objc_finish_method_definition (current_function_decl
);
7558 /* This code is executed when we find a method definition
7559 outside of an @implementation context (or invalid for other
7560 reasons). Parse the method (to keep going) but do not emit
7563 c_parser_compound_statement (parser
);
7567 /* Parse an objc-methodprotolist.
7569 objc-methodprotolist:
7571 objc-methodprotolist objc-methodproto
7572 objc-methodprotolist declaration
7573 objc-methodprotolist ;
7577 The declaration is a data definition, which may be missing
7578 declaration specifiers under the same rules and diagnostics as
7579 other data definitions outside functions, and the stray semicolon
7580 is diagnosed the same way as a stray semicolon outside a
7584 c_parser_objc_methodprotolist (c_parser
*parser
)
7588 /* The list is terminated by @end. */
7589 switch (c_parser_peek_token (parser
)->type
)
7592 pedwarn (c_parser_peek_token (parser
)->location
, OPT_Wpedantic
,
7593 "ISO C does not allow extra %<;%> outside of a function");
7594 c_parser_consume_token (parser
);
7598 c_parser_objc_methodproto (parser
);
7601 c_parser_pragma (parser
, pragma_external
);
7606 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
7608 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
))
7609 c_parser_objc_at_property_declaration (parser
);
7610 else if (c_parser_next_token_is_keyword (parser
, RID_AT_OPTIONAL
))
7612 objc_set_method_opt (true);
7613 c_parser_consume_token (parser
);
7615 else if (c_parser_next_token_is_keyword (parser
, RID_AT_REQUIRED
))
7617 objc_set_method_opt (false);
7618 c_parser_consume_token (parser
);
7621 c_parser_declaration_or_fndef (parser
, false, false, true,
7628 /* Parse an objc-methodproto.
7631 objc-method-type objc-method-decl ;
7635 c_parser_objc_methodproto (c_parser
*parser
)
7637 bool is_class_method
= c_parser_objc_method_type (parser
);
7638 tree decl
, attributes
= NULL_TREE
;
7640 /* Remember protocol qualifiers in prototypes. */
7641 parser
->objc_pq_context
= true;
7642 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
,
7644 /* Forget protocol qualifiers now. */
7645 parser
->objc_pq_context
= false;
7647 /* Do not allow the presence of attributes to hide an erroneous
7648 method implementation in the interface section. */
7649 if (!c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7651 c_parser_error (parser
, "expected %<;%>");
7655 if (decl
!= error_mark_node
)
7656 objc_add_method_declaration (is_class_method
, decl
, attributes
);
7658 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7661 /* If we are at a position that method attributes may be present, check that
7662 there are not any parsed already (a syntax error) and then collect any
7663 specified at the current location. Finally, if new attributes were present,
7664 check that the next token is legal ( ';' for decls and '{' for defs). */
7667 c_parser_objc_maybe_method_attributes (c_parser
* parser
, tree
* attributes
)
7672 c_parser_error (parser
,
7673 "method attributes must be specified at the end only");
7674 *attributes
= NULL_TREE
;
7678 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7679 *attributes
= c_parser_attributes (parser
);
7681 /* If there were no attributes here, just report any earlier error. */
7682 if (*attributes
== NULL_TREE
|| bad
)
7685 /* If the attributes are followed by a ; or {, then just report any earlier
7687 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
7688 || c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7691 /* We've got attributes, but not at the end. */
7692 c_parser_error (parser
,
7693 "expected %<;%> or %<{%> after method attribute definition");
7697 /* Parse an objc-method-decl.
7700 ( objc-type-name ) objc-selector
7702 ( objc-type-name ) objc-keyword-selector objc-optparmlist
7703 objc-keyword-selector objc-optparmlist
7706 objc-keyword-selector:
7708 objc-keyword-selector objc-keyword-decl
7711 objc-selector : ( objc-type-name ) identifier
7712 objc-selector : identifier
7713 : ( objc-type-name ) identifier
7717 objc-optparms objc-optellipsis
7721 objc-opt-parms , parameter-declaration
7729 c_parser_objc_method_decl (c_parser
*parser
, bool is_class_method
,
7730 tree
*attributes
, tree
*expr
)
7732 tree type
= NULL_TREE
;
7734 tree parms
= NULL_TREE
;
7735 bool ellipsis
= false;
7736 bool attr_err
= false;
7738 *attributes
= NULL_TREE
;
7739 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7741 c_parser_consume_token (parser
);
7742 type
= c_parser_objc_type_name (parser
);
7743 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7745 sel
= c_parser_objc_selector (parser
);
7746 /* If there is no selector, or a colon follows, we have an
7747 objc-keyword-selector. If there is a selector, and a colon does
7748 not follow, that selector ends the objc-method-decl. */
7749 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
7752 tree list
= NULL_TREE
;
7755 tree atype
= NULL_TREE
, id
, keyworddecl
;
7756 tree param_attr
= NULL_TREE
;
7757 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7759 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7761 c_parser_consume_token (parser
);
7762 atype
= c_parser_objc_type_name (parser
);
7763 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7766 /* New ObjC allows attributes on method parameters. */
7767 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7768 param_attr
= c_parser_attributes (parser
);
7769 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7771 c_parser_error (parser
, "expected identifier");
7772 return error_mark_node
;
7774 id
= c_parser_peek_token (parser
)->value
;
7775 c_parser_consume_token (parser
);
7776 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
, param_attr
);
7777 list
= chainon (list
, keyworddecl
);
7778 tsel
= c_parser_objc_selector (parser
);
7779 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7783 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7785 /* Parse the optional parameter list. Optional Objective-C
7786 method parameters follow the C syntax, and may include '...'
7787 to denote a variable number of arguments. */
7788 parms
= make_node (TREE_LIST
);
7789 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7791 struct c_parm
*parm
;
7792 c_parser_consume_token (parser
);
7793 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7796 c_parser_consume_token (parser
);
7797 attr_err
|= c_parser_objc_maybe_method_attributes
7798 (parser
, attributes
) ;
7801 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7804 parms
= chainon (parms
,
7805 build_tree_list (NULL_TREE
, grokparm (parm
, expr
)));
7810 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7814 c_parser_error (parser
, "objective-c method declaration is expected");
7815 return error_mark_node
;
7819 return error_mark_node
;
7821 return objc_build_method_signature (is_class_method
, type
, sel
, parms
, ellipsis
);
7824 /* Parse an objc-type-name.
7827 objc-type-qualifiers[opt] type-name
7828 objc-type-qualifiers[opt]
7830 objc-type-qualifiers:
7832 objc-type-qualifiers objc-type-qualifier
7834 objc-type-qualifier: one of
7835 in out inout bycopy byref oneway
7839 c_parser_objc_type_name (c_parser
*parser
)
7841 tree quals
= NULL_TREE
;
7842 struct c_type_name
*type_name
= NULL
;
7843 tree type
= NULL_TREE
;
7846 c_token
*token
= c_parser_peek_token (parser
);
7847 if (token
->type
== CPP_KEYWORD
7848 && (token
->keyword
== RID_IN
7849 || token
->keyword
== RID_OUT
7850 || token
->keyword
== RID_INOUT
7851 || token
->keyword
== RID_BYCOPY
7852 || token
->keyword
== RID_BYREF
7853 || token
->keyword
== RID_ONEWAY
))
7855 quals
= chainon (build_tree_list (NULL_TREE
, token
->value
), quals
);
7856 c_parser_consume_token (parser
);
7861 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
7862 type_name
= c_parser_type_name (parser
);
7864 type
= groktypename (type_name
, NULL
, NULL
);
7866 /* If the type is unknown, and error has already been produced and
7867 we need to recover from the error. In that case, use NULL_TREE
7868 for the type, as if no type had been specified; this will use the
7869 default type ('id') which is good for error recovery. */
7870 if (type
== error_mark_node
)
7873 return build_tree_list (quals
, type
);
7876 /* Parse objc-protocol-refs.
7883 c_parser_objc_protocol_refs (c_parser
*parser
)
7885 tree list
= NULL_TREE
;
7886 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
7887 c_parser_consume_token (parser
);
7888 /* Any identifiers, including those declared as type names, are OK
7893 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7895 c_parser_error (parser
, "expected identifier");
7898 id
= c_parser_peek_token (parser
)->value
;
7899 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7900 c_parser_consume_token (parser
);
7901 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7902 c_parser_consume_token (parser
);
7906 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
7910 /* Parse an objc-try-catch-finally-statement.
7912 objc-try-catch-finally-statement:
7913 @try compound-statement objc-catch-list[opt]
7914 @try compound-statement objc-catch-list[opt] @finally compound-statement
7917 @catch ( objc-catch-parameter-declaration ) compound-statement
7918 objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
7920 objc-catch-parameter-declaration:
7921 parameter-declaration
7924 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
7926 PS: This function is identical to cp_parser_objc_try_catch_finally_statement
7927 for C++. Keep them in sync. */
7930 c_parser_objc_try_catch_finally_statement (c_parser
*parser
)
7932 location_t location
;
7935 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
7936 c_parser_consume_token (parser
);
7937 location
= c_parser_peek_token (parser
)->location
;
7938 objc_maybe_warn_exceptions (location
);
7939 stmt
= c_parser_compound_statement (parser
);
7940 objc_begin_try_stmt (location
, stmt
);
7942 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
7944 struct c_parm
*parm
;
7945 tree parameter_declaration
= error_mark_node
;
7946 bool seen_open_paren
= false;
7948 c_parser_consume_token (parser
);
7949 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7950 seen_open_paren
= true;
7951 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7953 /* We have "@catch (...)" (where the '...' are literally
7954 what is in the code). Skip the '...'.
7955 parameter_declaration is set to NULL_TREE, and
7956 objc_being_catch_clauses() knows that that means
7958 c_parser_consume_token (parser
);
7959 parameter_declaration
= NULL_TREE
;
7963 /* We have "@catch (NSException *exception)" or something
7964 like that. Parse the parameter declaration. */
7965 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7967 parameter_declaration
= error_mark_node
;
7969 parameter_declaration
= grokparm (parm
, NULL
);
7971 if (seen_open_paren
)
7972 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7975 /* If there was no open parenthesis, we are recovering from
7976 an error, and we are trying to figure out what mistake
7977 the user has made. */
7979 /* If there is an immediate closing parenthesis, the user
7980 probably forgot the opening one (ie, they typed "@catch
7981 NSException *e)". Parse the closing parenthesis and keep
7983 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
7984 c_parser_consume_token (parser
);
7986 /* If these is no immediate closing parenthesis, the user
7987 probably doesn't know that parenthesis are required at
7988 all (ie, they typed "@catch NSException *e"). So, just
7989 forget about the closing parenthesis and keep going. */
7991 objc_begin_catch_clause (parameter_declaration
);
7992 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7993 c_parser_compound_statement_nostart (parser
);
7994 objc_finish_catch_clause ();
7996 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
7998 c_parser_consume_token (parser
);
7999 location
= c_parser_peek_token (parser
)->location
;
8000 stmt
= c_parser_compound_statement (parser
);
8001 objc_build_finally_clause (location
, stmt
);
8003 objc_finish_try_stmt ();
8006 /* Parse an objc-synchronized-statement.
8008 objc-synchronized-statement:
8009 @synchronized ( expression ) compound-statement
8013 c_parser_objc_synchronized_statement (c_parser
*parser
)
8017 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
8018 c_parser_consume_token (parser
);
8019 loc
= c_parser_peek_token (parser
)->location
;
8020 objc_maybe_warn_exceptions (loc
);
8021 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8023 expr
= c_parser_expression (parser
).value
;
8024 expr
= c_fully_fold (expr
, false, NULL
);
8025 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8028 expr
= error_mark_node
;
8029 stmt
= c_parser_compound_statement (parser
);
8030 objc_build_synchronized (loc
, expr
, stmt
);
8033 /* Parse an objc-selector; return NULL_TREE without an error if the
8034 next token is not an objc-selector.
8039 enum struct union if else while do for switch case default
8040 break continue return goto asm sizeof typeof __alignof
8041 unsigned long const short volatile signed restrict _Complex
8042 in out inout bycopy byref oneway int char float double void _Bool
8044 ??? Why this selection of keywords but not, for example, storage
8045 class specifiers? */
8048 c_parser_objc_selector (c_parser
*parser
)
8050 c_token
*token
= c_parser_peek_token (parser
);
8051 tree value
= token
->value
;
8052 if (token
->type
== CPP_NAME
)
8054 c_parser_consume_token (parser
);
8057 if (token
->type
!= CPP_KEYWORD
)
8059 switch (token
->keyword
)
8101 c_parser_consume_token (parser
);
8108 /* Parse an objc-selector-arg.
8112 objc-keywordname-list
8114 objc-keywordname-list:
8116 objc-keywordname-list objc-keywordname
8124 c_parser_objc_selector_arg (c_parser
*parser
)
8126 tree sel
= c_parser_objc_selector (parser
);
8127 tree list
= NULL_TREE
;
8128 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
8132 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
8134 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
8135 sel
= c_parser_objc_selector (parser
);
8136 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
8142 /* Parse an objc-receiver.
8151 c_parser_objc_receiver (c_parser
*parser
)
8153 if (c_parser_peek_token (parser
)->type
== CPP_NAME
8154 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
8155 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
8157 tree id
= c_parser_peek_token (parser
)->value
;
8158 c_parser_consume_token (parser
);
8159 return objc_get_class_reference (id
);
8161 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
8164 /* Parse objc-message-args.
8168 objc-keywordarg-list
8170 objc-keywordarg-list:
8172 objc-keywordarg-list objc-keywordarg
8175 objc-selector : objc-keywordexpr
8180 c_parser_objc_message_args (c_parser
*parser
)
8182 tree sel
= c_parser_objc_selector (parser
);
8183 tree list
= NULL_TREE
;
8184 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
8189 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
8190 return error_mark_node
;
8191 keywordexpr
= c_parser_objc_keywordexpr (parser
);
8192 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
8193 sel
= c_parser_objc_selector (parser
);
8194 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
8200 /* Parse an objc-keywordexpr.
8207 c_parser_objc_keywordexpr (c_parser
*parser
)
8210 vec
<tree
, va_gc
> *expr_list
= c_parser_expr_list (parser
, true, true,
8212 if (vec_safe_length (expr_list
) == 1)
8214 /* Just return the expression, remove a level of
8216 ret
= (*expr_list
)[0];
8220 /* We have a comma expression, we will collapse later. */
8221 ret
= build_tree_list_vec (expr_list
);
8223 release_tree_vector (expr_list
);
8227 /* A check, needed in several places, that ObjC interface, implementation or
8228 method definitions are not prefixed by incorrect items. */
8230 c_parser_objc_diagnose_bad_element_prefix (c_parser
*parser
,
8231 struct c_declspecs
*specs
)
8233 if (!specs
->declspecs_seen_p
|| specs
->non_sc_seen_p
8234 || specs
->typespec_kind
!= ctsk_none
)
8236 c_parser_error (parser
,
8237 "no type or storage class may be specified here,");
8238 c_parser_skip_to_end_of_block_or_statement (parser
);
8244 /* Parse an Objective-C @property declaration. The syntax is:
8246 objc-property-declaration:
8247 '@property' objc-property-attributes[opt] struct-declaration ;
8249 objc-property-attributes:
8250 '(' objc-property-attribute-list ')'
8252 objc-property-attribute-list:
8253 objc-property-attribute
8254 objc-property-attribute-list, objc-property-attribute
8256 objc-property-attribute
8257 'getter' = identifier
8258 'setter' = identifier
8267 @property NSString *name;
8268 @property (readonly) id object;
8269 @property (retain, nonatomic, getter=getTheName) id name;
8270 @property int a, b, c;
8272 PS: This function is identical to cp_parser_objc_at_propery_declaration
8273 for C++. Keep them in sync. */
8275 c_parser_objc_at_property_declaration (c_parser
*parser
)
8277 /* The following variables hold the attributes of the properties as
8278 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
8279 seen. When we see an attribute, we set them to 'true' (if they
8280 are boolean properties) or to the identifier (if they have an
8281 argument, ie, for getter and setter). Note that here we only
8282 parse the list of attributes, check the syntax and accumulate the
8283 attributes that we find. objc_add_property_declaration() will
8284 then process the information. */
8285 bool property_assign
= false;
8286 bool property_copy
= false;
8287 tree property_getter_ident
= NULL_TREE
;
8288 bool property_nonatomic
= false;
8289 bool property_readonly
= false;
8290 bool property_readwrite
= false;
8291 bool property_retain
= false;
8292 tree property_setter_ident
= NULL_TREE
;
8294 /* 'properties' is the list of properties that we read. Usually a
8295 single one, but maybe more (eg, in "@property int a, b, c;" there
8300 loc
= c_parser_peek_token (parser
)->location
;
8301 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
));
8303 c_parser_consume_token (parser
); /* Eat '@property'. */
8305 /* Parse the optional attribute list... */
8306 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
8309 c_parser_consume_token (parser
);
8311 /* Property attribute keywords are valid now. */
8312 parser
->objc_property_attr_context
= true;
8316 bool syntax_error
= false;
8317 c_token
*token
= c_parser_peek_token (parser
);
8320 if (token
->type
!= CPP_KEYWORD
)
8322 if (token
->type
== CPP_CLOSE_PAREN
)
8323 c_parser_error (parser
, "expected identifier");
8326 c_parser_consume_token (parser
);
8327 c_parser_error (parser
, "unknown property attribute");
8331 keyword
= token
->keyword
;
8332 c_parser_consume_token (parser
);
8335 case RID_ASSIGN
: property_assign
= true; break;
8336 case RID_COPY
: property_copy
= true; break;
8337 case RID_NONATOMIC
: property_nonatomic
= true; break;
8338 case RID_READONLY
: property_readonly
= true; break;
8339 case RID_READWRITE
: property_readwrite
= true; break;
8340 case RID_RETAIN
: property_retain
= true; break;
8344 if (c_parser_next_token_is_not (parser
, CPP_EQ
))
8346 if (keyword
== RID_GETTER
)
8347 c_parser_error (parser
,
8348 "missing %<=%> (after %<getter%> attribute)");
8350 c_parser_error (parser
,
8351 "missing %<=%> (after %<setter%> attribute)");
8352 syntax_error
= true;
8355 c_parser_consume_token (parser
); /* eat the = */
8356 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8358 c_parser_error (parser
, "expected identifier");
8359 syntax_error
= true;
8362 if (keyword
== RID_SETTER
)
8364 if (property_setter_ident
!= NULL_TREE
)
8365 c_parser_error (parser
, "the %<setter%> attribute may only be specified once");
8367 property_setter_ident
= c_parser_peek_token (parser
)->value
;
8368 c_parser_consume_token (parser
);
8369 if (c_parser_next_token_is_not (parser
, CPP_COLON
))
8370 c_parser_error (parser
, "setter name must terminate with %<:%>");
8372 c_parser_consume_token (parser
);
8376 if (property_getter_ident
!= NULL_TREE
)
8377 c_parser_error (parser
, "the %<getter%> attribute may only be specified once");
8379 property_getter_ident
= c_parser_peek_token (parser
)->value
;
8380 c_parser_consume_token (parser
);
8384 c_parser_error (parser
, "unknown property attribute");
8385 syntax_error
= true;
8392 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8393 c_parser_consume_token (parser
);
8397 parser
->objc_property_attr_context
= false;
8398 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8400 /* ... and the property declaration(s). */
8401 properties
= c_parser_struct_declaration (parser
);
8403 if (properties
== error_mark_node
)
8405 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8406 parser
->error
= false;
8410 if (properties
== NULL_TREE
)
8411 c_parser_error (parser
, "expected identifier");
8414 /* Comma-separated properties are chained together in
8415 reverse order; add them one by one. */
8416 properties
= nreverse (properties
);
8418 for (; properties
; properties
= TREE_CHAIN (properties
))
8419 objc_add_property_declaration (loc
, copy_node (properties
),
8420 property_readonly
, property_readwrite
,
8421 property_assign
, property_retain
,
8422 property_copy
, property_nonatomic
,
8423 property_getter_ident
, property_setter_ident
);
8426 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8427 parser
->error
= false;
8430 /* Parse an Objective-C @synthesize declaration. The syntax is:
8432 objc-synthesize-declaration:
8433 @synthesize objc-synthesize-identifier-list ;
8435 objc-synthesize-identifier-list:
8436 objc-synthesize-identifier
8437 objc-synthesize-identifier-list, objc-synthesize-identifier
8439 objc-synthesize-identifier
8441 identifier = identifier
8444 @synthesize MyProperty;
8445 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
8447 PS: This function is identical to cp_parser_objc_at_synthesize_declaration
8448 for C++. Keep them in sync.
8451 c_parser_objc_at_synthesize_declaration (c_parser
*parser
)
8453 tree list
= NULL_TREE
;
8455 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNTHESIZE
));
8456 loc
= c_parser_peek_token (parser
)->location
;
8458 c_parser_consume_token (parser
);
8461 tree property
, ivar
;
8462 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8464 c_parser_error (parser
, "expected identifier");
8465 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8466 /* Once we find the semicolon, we can resume normal parsing.
8467 We have to reset parser->error manually because
8468 c_parser_skip_until_found() won't reset it for us if the
8469 next token is precisely a semicolon. */
8470 parser
->error
= false;
8473 property
= c_parser_peek_token (parser
)->value
;
8474 c_parser_consume_token (parser
);
8475 if (c_parser_next_token_is (parser
, CPP_EQ
))
8477 c_parser_consume_token (parser
);
8478 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8480 c_parser_error (parser
, "expected identifier");
8481 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8482 parser
->error
= false;
8485 ivar
= c_parser_peek_token (parser
)->value
;
8486 c_parser_consume_token (parser
);
8490 list
= chainon (list
, build_tree_list (ivar
, property
));
8491 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8492 c_parser_consume_token (parser
);
8496 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8497 objc_add_synthesize_declaration (loc
, list
);
8500 /* Parse an Objective-C @dynamic declaration. The syntax is:
8502 objc-dynamic-declaration:
8503 @dynamic identifier-list ;
8506 @dynamic MyProperty;
8507 @dynamic MyProperty, AnotherProperty;
8509 PS: This function is identical to cp_parser_objc_at_dynamic_declaration
8510 for C++. Keep them in sync.
8513 c_parser_objc_at_dynamic_declaration (c_parser
*parser
)
8515 tree list
= NULL_TREE
;
8517 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_DYNAMIC
));
8518 loc
= c_parser_peek_token (parser
)->location
;
8520 c_parser_consume_token (parser
);
8524 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8526 c_parser_error (parser
, "expected identifier");
8527 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8528 parser
->error
= false;
8531 property
= c_parser_peek_token (parser
)->value
;
8532 list
= chainon (list
, build_tree_list (NULL_TREE
, property
));
8533 c_parser_consume_token (parser
);
8534 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8535 c_parser_consume_token (parser
);
8539 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8540 objc_add_dynamic_declaration (loc
, list
);
8544 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
8545 should be considered, statements. ALLOW_STMT is true if we're within
8546 the context of a function and such pragmas are to be allowed. Returns
8547 true if we actually parsed such a pragma. */
8550 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
8554 id
= c_parser_peek_token (parser
)->pragma_kind
;
8555 gcc_assert (id
!= PRAGMA_NONE
);
8559 case PRAGMA_OMP_BARRIER
:
8560 if (context
!= pragma_compound
)
8562 if (context
== pragma_stmt
)
8563 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
8564 "used in compound statements");
8567 c_parser_omp_barrier (parser
);
8570 case PRAGMA_OMP_FLUSH
:
8571 if (context
!= pragma_compound
)
8573 if (context
== pragma_stmt
)
8574 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
8575 "used in compound statements");
8578 c_parser_omp_flush (parser
);
8581 case PRAGMA_OMP_TASKWAIT
:
8582 if (context
!= pragma_compound
)
8584 if (context
== pragma_stmt
)
8585 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
8586 "used in compound statements");
8589 c_parser_omp_taskwait (parser
);
8592 case PRAGMA_OMP_TASKYIELD
:
8593 if (context
!= pragma_compound
)
8595 if (context
== pragma_stmt
)
8596 c_parser_error (parser
, "%<#pragma omp taskyield%> may only be "
8597 "used in compound statements");
8600 c_parser_omp_taskyield (parser
);
8603 case PRAGMA_OMP_THREADPRIVATE
:
8604 c_parser_omp_threadprivate (parser
);
8607 case PRAGMA_OMP_SECTION
:
8608 error_at (c_parser_peek_token (parser
)->location
,
8609 "%<#pragma omp section%> may only be used in "
8610 "%<#pragma omp sections%> construct");
8611 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8614 case PRAGMA_GCC_PCH_PREPROCESS
:
8615 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
8616 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8620 if (id
< PRAGMA_FIRST_EXTERNAL
)
8622 if (context
== pragma_external
)
8625 c_parser_error (parser
, "expected declaration specifiers");
8626 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8629 c_parser_omp_construct (parser
);
8635 c_parser_consume_pragma (parser
);
8636 c_invoke_pragma_handler (id
);
8638 /* Skip to EOL, but suppress any error message. Those will have been
8639 generated by the handler routine through calling error, as opposed
8640 to calling c_parser_error. */
8641 parser
->error
= true;
8642 c_parser_skip_to_pragma_eol (parser
);
8647 /* The interface the pragma parsers have to the lexer. */
8650 pragma_lex (tree
*value
)
8652 c_token
*tok
= c_parser_peek_token (the_parser
);
8653 enum cpp_ttype ret
= tok
->type
;
8655 *value
= tok
->value
;
8656 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
8660 if (ret
== CPP_KEYWORD
)
8662 c_parser_consume_token (the_parser
);
8669 c_parser_pragma_pch_preprocess (c_parser
*parser
)
8673 c_parser_consume_pragma (parser
);
8674 if (c_parser_next_token_is (parser
, CPP_STRING
))
8676 name
= c_parser_peek_token (parser
)->value
;
8677 c_parser_consume_token (parser
);
8680 c_parser_error (parser
, "expected string literal");
8681 c_parser_skip_to_pragma_eol (parser
);
8684 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
8687 /* OpenMP 2.5 parsing routines. */
8689 /* Returns name of the next clause.
8690 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
8691 the token is not consumed. Otherwise appropriate pragma_omp_clause is
8692 returned and the token is consumed. */
8694 static pragma_omp_clause
8695 c_parser_omp_clause_name (c_parser
*parser
)
8697 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
8699 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
8700 result
= PRAGMA_OMP_CLAUSE_IF
;
8701 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
8702 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
8703 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8705 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8710 if (!strcmp ("collapse", p
))
8711 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
8712 else if (!strcmp ("copyin", p
))
8713 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
8714 else if (!strcmp ("copyprivate", p
))
8715 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
8718 if (!strcmp ("final", p
))
8719 result
= PRAGMA_OMP_CLAUSE_FINAL
;
8720 else if (!strcmp ("firstprivate", p
))
8721 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
8724 if (!strcmp ("lastprivate", p
))
8725 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
8728 if (!strcmp ("mergeable", p
))
8729 result
= PRAGMA_OMP_CLAUSE_MERGEABLE
;
8732 if (!strcmp ("nowait", p
))
8733 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
8734 else if (!strcmp ("num_threads", p
))
8735 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
8738 if (!strcmp ("ordered", p
))
8739 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
8742 if (!strcmp ("private", p
))
8743 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
8746 if (!strcmp ("reduction", p
))
8747 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
8750 if (!strcmp ("schedule", p
))
8751 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
8752 else if (!strcmp ("shared", p
))
8753 result
= PRAGMA_OMP_CLAUSE_SHARED
;
8756 if (!strcmp ("untied", p
))
8757 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
8762 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
8763 c_parser_consume_token (parser
);
8768 /* Validate that a clause of the given type does not already exist. */
8771 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
8776 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
8777 if (OMP_CLAUSE_CODE (c
) == code
)
8779 location_t loc
= OMP_CLAUSE_LOCATION (c
);
8780 error_at (loc
, "too many %qs clauses", name
);
8788 variable-list , identifier
8790 If KIND is nonzero, create the appropriate node and install the
8791 decl in OMP_CLAUSE_DECL and add the node to the head of the list.
8792 If KIND is nonzero, CLAUSE_LOC is the location of the clause.
8794 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
8795 return the list created. */
8798 c_parser_omp_variable_list (c_parser
*parser
,
8799 location_t clause_loc
,
8800 enum omp_clause_code kind
,
8803 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
8804 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
8805 c_parser_error (parser
, "expected identifier");
8807 while (c_parser_next_token_is (parser
, CPP_NAME
)
8808 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
8810 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
8813 undeclared_variable (c_parser_peek_token (parser
)->location
,
8814 c_parser_peek_token (parser
)->value
);
8815 else if (t
== error_mark_node
)
8819 tree u
= build_omp_clause (clause_loc
, kind
);
8820 OMP_CLAUSE_DECL (u
) = t
;
8821 OMP_CLAUSE_CHAIN (u
) = list
;
8825 list
= tree_cons (t
, NULL_TREE
, list
);
8827 c_parser_consume_token (parser
);
8829 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
8832 c_parser_consume_token (parser
);
8838 /* Similarly, but expect leading and trailing parenthesis. This is a very
8839 common case for omp clauses. */
8842 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
8845 /* The clauses location. */
8846 location_t loc
= c_parser_peek_token (parser
)->location
;
8848 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8850 list
= c_parser_omp_variable_list (parser
, loc
, kind
, list
);
8851 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8857 collapse ( constant-expression ) */
8860 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
8862 tree c
, num
= error_mark_node
;
8866 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
8868 loc
= c_parser_peek_token (parser
)->location
;
8869 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8871 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
8872 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8874 if (num
== error_mark_node
)
8876 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
8877 || !host_integerp (num
, 0)
8878 || (n
= tree_low_cst (num
, 0)) <= 0
8882 "collapse argument needs positive constant integer expression");
8885 c
= build_omp_clause (loc
, OMP_CLAUSE_COLLAPSE
);
8886 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
8887 OMP_CLAUSE_CHAIN (c
) = list
;
8892 copyin ( variable-list ) */
8895 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
8897 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
8901 copyprivate ( variable-list ) */
8904 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
8906 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
8910 default ( shared | none ) */
8913 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
8915 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
8916 location_t loc
= c_parser_peek_token (parser
)->location
;
8919 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8921 if (c_parser_next_token_is (parser
, CPP_NAME
))
8923 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8928 if (strcmp ("none", p
) != 0)
8930 kind
= OMP_CLAUSE_DEFAULT_NONE
;
8934 if (strcmp ("shared", p
) != 0)
8936 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
8943 c_parser_consume_token (parser
);
8948 c_parser_error (parser
, "expected %<none%> or %<shared%>");
8950 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8952 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
8955 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
8956 c
= build_omp_clause (loc
, OMP_CLAUSE_DEFAULT
);
8957 OMP_CLAUSE_CHAIN (c
) = list
;
8958 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
8964 firstprivate ( variable-list ) */
8967 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
8969 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
8973 final ( expression ) */
8976 c_parser_omp_clause_final (c_parser
*parser
, tree list
)
8978 location_t loc
= c_parser_peek_token (parser
)->location
;
8979 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
8981 tree t
= c_parser_paren_condition (parser
);
8984 check_no_duplicate_clause (list
, OMP_CLAUSE_FINAL
, "final");
8986 c
= build_omp_clause (loc
, OMP_CLAUSE_FINAL
);
8987 OMP_CLAUSE_FINAL_EXPR (c
) = t
;
8988 OMP_CLAUSE_CHAIN (c
) = list
;
8992 c_parser_error (parser
, "expected %<(%>");
8998 if ( expression ) */
9001 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
9003 location_t loc
= c_parser_peek_token (parser
)->location
;
9004 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9006 tree t
= c_parser_paren_condition (parser
);
9009 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
9011 c
= build_omp_clause (loc
, OMP_CLAUSE_IF
);
9012 OMP_CLAUSE_IF_EXPR (c
) = t
;
9013 OMP_CLAUSE_CHAIN (c
) = list
;
9017 c_parser_error (parser
, "expected %<(%>");
9023 lastprivate ( variable-list ) */
9026 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
9028 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
9035 c_parser_omp_clause_mergeable (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
9039 /* FIXME: Should we allow duplicates? */
9040 check_no_duplicate_clause (list
, OMP_CLAUSE_MERGEABLE
, "mergeable");
9042 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
9043 OMP_CLAUSE_MERGEABLE
);
9044 OMP_CLAUSE_CHAIN (c
) = list
;
9053 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
9056 location_t loc
= c_parser_peek_token (parser
)->location
;
9058 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
9060 c
= build_omp_clause (loc
, OMP_CLAUSE_NOWAIT
);
9061 OMP_CLAUSE_CHAIN (c
) = list
;
9066 num_threads ( expression ) */
9069 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
9071 location_t num_threads_loc
= c_parser_peek_token (parser
)->location
;
9072 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9074 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
9075 tree c
, t
= c_parser_expression (parser
).value
;
9077 t
= c_fully_fold (t
, false, NULL
);
9079 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9081 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
9083 c_parser_error (parser
, "expected integer expression");
9087 /* Attempt to statically determine when the number isn't positive. */
9088 c
= fold_build2_loc (expr_loc
, LE_EXPR
, boolean_type_node
, t
,
9089 build_int_cst (TREE_TYPE (t
), 0));
9090 if (CAN_HAVE_LOCATION_P (c
))
9091 SET_EXPR_LOCATION (c
, expr_loc
);
9092 if (c
== boolean_true_node
)
9094 warning_at (expr_loc
, 0,
9095 "%<num_threads%> value must be positive");
9096 t
= integer_one_node
;
9099 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
9101 c
= build_omp_clause (num_threads_loc
, OMP_CLAUSE_NUM_THREADS
);
9102 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
9103 OMP_CLAUSE_CHAIN (c
) = list
;
9114 c_parser_omp_clause_ordered (c_parser
*parser
, tree list
)
9118 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
9120 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
9121 OMP_CLAUSE_ORDERED
);
9122 OMP_CLAUSE_CHAIN (c
) = list
;
9128 private ( variable-list ) */
9131 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
9133 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
9137 reduction ( reduction-operator : variable-list )
9140 One of: + * - & ^ | && ||
9145 One of: + * - & ^ | && || max min */
9148 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
9150 location_t clause_loc
= c_parser_peek_token (parser
)->location
;
9151 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9153 enum tree_code code
;
9155 switch (c_parser_peek_token (parser
)->type
)
9167 code
= BIT_AND_EXPR
;
9170 code
= BIT_XOR_EXPR
;
9173 code
= BIT_IOR_EXPR
;
9176 code
= TRUTH_ANDIF_EXPR
;
9179 code
= TRUTH_ORIF_EXPR
;
9184 = IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
9185 if (strcmp (p
, "min") == 0)
9190 if (strcmp (p
, "max") == 0)
9198 c_parser_error (parser
,
9199 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
9200 "%<^%>, %<|%>, %<&&%>, %<||%>, %<min%> or %<max%>");
9201 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
9204 c_parser_consume_token (parser
);
9205 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
9209 nl
= c_parser_omp_variable_list (parser
, clause_loc
,
9210 OMP_CLAUSE_REDUCTION
, list
);
9211 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
9212 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
9216 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9222 schedule ( schedule-kind )
9223 schedule ( schedule-kind , expression )
9226 static | dynamic | guided | runtime | auto
9230 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
9233 location_t loc
= c_parser_peek_token (parser
)->location
;
9235 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9238 c
= build_omp_clause (loc
, OMP_CLAUSE_SCHEDULE
);
9240 if (c_parser_next_token_is (parser
, CPP_NAME
))
9242 tree kind
= c_parser_peek_token (parser
)->value
;
9243 const char *p
= IDENTIFIER_POINTER (kind
);
9248 if (strcmp ("dynamic", p
) != 0)
9250 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
9254 if (strcmp ("guided", p
) != 0)
9256 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
9260 if (strcmp ("runtime", p
) != 0)
9262 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
9269 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
9270 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
9271 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
9272 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
9276 c_parser_consume_token (parser
);
9277 if (c_parser_next_token_is (parser
, CPP_COMMA
))
9280 c_parser_consume_token (parser
);
9282 here
= c_parser_peek_token (parser
)->location
;
9283 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
9285 t
= c_fully_fold (t
, false, NULL
);
9287 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
9288 error_at (here
, "schedule %<runtime%> does not take "
9289 "a %<chunk_size%> parameter");
9290 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
9292 "schedule %<auto%> does not take "
9293 "a %<chunk_size%> parameter");
9294 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
9295 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
9297 c_parser_error (parser
, "expected integer expression");
9299 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9302 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
9303 "expected %<,%> or %<)%>");
9305 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
9306 OMP_CLAUSE_CHAIN (c
) = list
;
9310 c_parser_error (parser
, "invalid schedule kind");
9311 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
9316 shared ( variable-list ) */
9319 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
9321 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
9328 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
9332 /* FIXME: Should we allow duplicates? */
9333 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
9335 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
9337 OMP_CLAUSE_CHAIN (c
) = list
;
9342 /* Parse all OpenMP clauses. The set clauses allowed by the directive
9343 is a bitmask in MASK. Return the list of clauses found; the result
9344 of clause default goes in *pdefault. */
9347 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
9350 tree clauses
= NULL
;
9353 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9356 pragma_omp_clause c_kind
;
9358 tree prev
= clauses
;
9360 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
9361 c_parser_consume_token (parser
);
9364 here
= c_parser_peek_token (parser
)->location
;
9365 c_kind
= c_parser_omp_clause_name (parser
);
9369 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
9370 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
9371 c_name
= "collapse";
9373 case PRAGMA_OMP_CLAUSE_COPYIN
:
9374 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
9377 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
9378 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
9379 c_name
= "copyprivate";
9381 case PRAGMA_OMP_CLAUSE_DEFAULT
:
9382 clauses
= c_parser_omp_clause_default (parser
, clauses
);
9385 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
9386 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
9387 c_name
= "firstprivate";
9389 case PRAGMA_OMP_CLAUSE_FINAL
:
9390 clauses
= c_parser_omp_clause_final (parser
, clauses
);
9393 case PRAGMA_OMP_CLAUSE_IF
:
9394 clauses
= c_parser_omp_clause_if (parser
, clauses
);
9397 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
9398 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
9399 c_name
= "lastprivate";
9401 case PRAGMA_OMP_CLAUSE_MERGEABLE
:
9402 clauses
= c_parser_omp_clause_mergeable (parser
, clauses
);
9403 c_name
= "mergeable";
9405 case PRAGMA_OMP_CLAUSE_NOWAIT
:
9406 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
9409 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
9410 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
9411 c_name
= "num_threads";
9413 case PRAGMA_OMP_CLAUSE_ORDERED
:
9414 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
9417 case PRAGMA_OMP_CLAUSE_PRIVATE
:
9418 clauses
= c_parser_omp_clause_private (parser
, clauses
);
9421 case PRAGMA_OMP_CLAUSE_REDUCTION
:
9422 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
9423 c_name
= "reduction";
9425 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
9426 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
9427 c_name
= "schedule";
9429 case PRAGMA_OMP_CLAUSE_SHARED
:
9430 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
9433 case PRAGMA_OMP_CLAUSE_UNTIED
:
9434 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
9438 c_parser_error (parser
, "expected %<#pragma omp%> clause");
9442 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
9444 /* Remove the invalid clause(s) from the list to avoid
9445 confusing the rest of the compiler. */
9447 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
9452 c_parser_skip_to_pragma_eol (parser
);
9454 return c_finish_omp_clauses (clauses
);
9461 In practice, we're also interested in adding the statement to an
9462 outer node. So it is convenient if we work around the fact that
9463 c_parser_statement calls add_stmt. */
9466 c_parser_omp_structured_block (c_parser
*parser
)
9468 tree stmt
= push_stmt_list ();
9469 c_parser_statement (parser
);
9470 return pop_stmt_list (stmt
);
9474 # pragma omp atomic new-line
9478 x binop= expr | x++ | ++x | x-- | --x
9480 +, *, -, /, &, ^, |, <<, >>
9482 where x is an lvalue expression with scalar type.
9485 # pragma omp atomic new-line
9488 # pragma omp atomic read new-line
9491 # pragma omp atomic write new-line
9494 # pragma omp atomic update new-line
9497 # pragma omp atomic capture new-line
9500 # pragma omp atomic capture new-line
9508 expression-stmt | x = x binop expr
9510 v = x binop= expr | v = x++ | v = ++x | v = x-- | v = --x
9512 { v = x; update-stmt; } | { update-stmt; v = x; }
9514 where x and v are lvalue expressions with scalar type.
9516 LOC is the location of the #pragma token. */
9519 c_parser_omp_atomic (location_t loc
, c_parser
*parser
)
9521 tree lhs
= NULL_TREE
, rhs
= NULL_TREE
, v
= NULL_TREE
;
9522 tree lhs1
= NULL_TREE
, rhs1
= NULL_TREE
;
9523 tree stmt
, orig_lhs
;
9524 enum tree_code code
= OMP_ATOMIC
, opcode
= NOP_EXPR
;
9525 struct c_expr rhs_expr
;
9526 bool structured_block
= false;
9528 if (c_parser_next_token_is (parser
, CPP_NAME
))
9530 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
9532 if (!strcmp (p
, "read"))
9533 code
= OMP_ATOMIC_READ
;
9534 else if (!strcmp (p
, "write"))
9536 else if (!strcmp (p
, "update"))
9538 else if (!strcmp (p
, "capture"))
9539 code
= OMP_ATOMIC_CAPTURE_NEW
;
9543 c_parser_consume_token (parser
);
9545 c_parser_skip_to_pragma_eol (parser
);
9549 case OMP_ATOMIC_READ
:
9550 case NOP_EXPR
: /* atomic write */
9551 v
= c_parser_unary_expression (parser
).value
;
9552 v
= c_fully_fold (v
, false, NULL
);
9553 if (v
== error_mark_node
)
9555 loc
= c_parser_peek_token (parser
)->location
;
9556 if (!c_parser_require (parser
, CPP_EQ
, "expected %<=%>"))
9558 if (code
== NOP_EXPR
)
9559 lhs
= c_parser_expression (parser
).value
;
9561 lhs
= c_parser_unary_expression (parser
).value
;
9562 lhs
= c_fully_fold (lhs
, false, NULL
);
9563 if (lhs
== error_mark_node
)
9565 if (code
== NOP_EXPR
)
9567 /* atomic write is represented by OMP_ATOMIC with NOP_EXPR
9575 case OMP_ATOMIC_CAPTURE_NEW
:
9576 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
9578 c_parser_consume_token (parser
);
9579 structured_block
= true;
9583 v
= c_parser_unary_expression (parser
).value
;
9584 v
= c_fully_fold (v
, false, NULL
);
9585 if (v
== error_mark_node
)
9587 if (!c_parser_require (parser
, CPP_EQ
, "expected %<=%>"))
9595 /* For structured_block case we don't know yet whether
9596 old or new x should be captured. */
9598 lhs
= c_parser_unary_expression (parser
).value
;
9599 lhs
= c_fully_fold (lhs
, false, NULL
);
9601 switch (TREE_CODE (lhs
))
9605 c_parser_skip_to_end_of_block_or_statement (parser
);
9606 if (structured_block
)
9608 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9609 c_parser_consume_token (parser
);
9610 else if (code
== OMP_ATOMIC_CAPTURE_NEW
)
9612 c_parser_skip_to_end_of_block_or_statement (parser
);
9613 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9614 c_parser_consume_token (parser
);
9619 case POSTINCREMENT_EXPR
:
9620 if (code
== OMP_ATOMIC_CAPTURE_NEW
&& !structured_block
)
9621 code
= OMP_ATOMIC_CAPTURE_OLD
;
9623 case PREINCREMENT_EXPR
:
9624 lhs
= TREE_OPERAND (lhs
, 0);
9626 rhs
= integer_one_node
;
9629 case POSTDECREMENT_EXPR
:
9630 if (code
== OMP_ATOMIC_CAPTURE_NEW
&& !structured_block
)
9631 code
= OMP_ATOMIC_CAPTURE_OLD
;
9633 case PREDECREMENT_EXPR
:
9634 lhs
= TREE_OPERAND (lhs
, 0);
9635 opcode
= MINUS_EXPR
;
9636 rhs
= integer_one_node
;
9640 if (TREE_CODE (TREE_OPERAND (lhs
, 0)) == SAVE_EXPR
9641 && TREE_CODE (TREE_OPERAND (lhs
, 1)) == COMPOUND_EXPR
9642 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0)) == MODIFY_EXPR
9643 && TREE_OPERAND (TREE_OPERAND (lhs
, 1), 1) == TREE_OPERAND (lhs
, 0)
9644 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
9645 (TREE_OPERAND (lhs
, 1), 0), 0)))
9647 /* Undo effects of boolean_increment for post {in,de}crement. */
9648 lhs
= TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0);
9651 if (TREE_CODE (lhs
) == MODIFY_EXPR
9652 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs
, 0))) == BOOLEAN_TYPE
)
9654 /* Undo effects of boolean_increment. */
9655 if (integer_onep (TREE_OPERAND (lhs
, 1)))
9657 /* This is pre or post increment. */
9658 rhs
= TREE_OPERAND (lhs
, 1);
9659 lhs
= TREE_OPERAND (lhs
, 0);
9661 if (code
== OMP_ATOMIC_CAPTURE_NEW
9662 && !structured_block
9663 && TREE_CODE (orig_lhs
) == COMPOUND_EXPR
)
9664 code
= OMP_ATOMIC_CAPTURE_OLD
;
9667 if (TREE_CODE (TREE_OPERAND (lhs
, 1)) == TRUTH_NOT_EXPR
9668 && TREE_OPERAND (lhs
, 0)
9669 == TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0))
9671 /* This is pre or post decrement. */
9672 rhs
= TREE_OPERAND (lhs
, 1);
9673 lhs
= TREE_OPERAND (lhs
, 0);
9675 if (code
== OMP_ATOMIC_CAPTURE_NEW
9676 && !structured_block
9677 && TREE_CODE (orig_lhs
) == COMPOUND_EXPR
)
9678 code
= OMP_ATOMIC_CAPTURE_OLD
;
9684 switch (c_parser_peek_token (parser
)->type
)
9690 opcode
= TRUNC_DIV_EXPR
;
9696 opcode
= MINUS_EXPR
;
9699 opcode
= LSHIFT_EXPR
;
9702 opcode
= RSHIFT_EXPR
;
9705 opcode
= BIT_AND_EXPR
;
9708 opcode
= BIT_IOR_EXPR
;
9711 opcode
= BIT_XOR_EXPR
;
9714 if (structured_block
|| code
== OMP_ATOMIC
)
9716 location_t aloc
= c_parser_peek_token (parser
)->location
;
9718 enum c_parser_prec oprec
= PREC_NONE
;
9720 c_parser_consume_token (parser
);
9721 rhs1
= c_parser_unary_expression (parser
).value
;
9722 rhs1
= c_fully_fold (rhs1
, false, NULL
);
9723 if (rhs1
== error_mark_node
)
9725 switch (c_parser_peek_token (parser
)->type
)
9728 if (code
== OMP_ATOMIC_CAPTURE_NEW
)
9730 code
= OMP_ATOMIC_CAPTURE_OLD
;
9735 c_parser_consume_token (parser
);
9738 c_parser_error (parser
,
9739 "invalid form of %<#pragma omp atomic%>");
9746 opcode
= TRUNC_DIV_EXPR
;
9754 opcode
= MINUS_EXPR
;
9758 opcode
= LSHIFT_EXPR
;
9762 opcode
= RSHIFT_EXPR
;
9766 opcode
= BIT_AND_EXPR
;
9767 oprec
= PREC_BITAND
;
9770 opcode
= BIT_IOR_EXPR
;
9774 opcode
= BIT_XOR_EXPR
;
9775 oprec
= PREC_BITXOR
;
9778 c_parser_error (parser
,
9779 "invalid operator for %<#pragma omp atomic%>");
9783 c_parser_consume_token (parser
);
9784 rhs_loc
= c_parser_peek_token (parser
)->location
;
9785 if (commutative_tree_code (opcode
))
9786 oprec
= (enum c_parser_prec
) (oprec
- 1);
9787 rhs_expr
= c_parser_binary_expression (parser
, NULL
, oprec
);
9788 rhs_expr
= default_function_array_read_conversion (rhs_loc
,
9790 rhs
= rhs_expr
.value
;
9791 rhs
= c_fully_fold (rhs
, false, NULL
);
9796 c_parser_error (parser
,
9797 "invalid operator for %<#pragma omp atomic%>");
9801 /* Arrange to pass the location of the assignment operator to
9802 c_finish_omp_atomic. */
9803 loc
= c_parser_peek_token (parser
)->location
;
9804 c_parser_consume_token (parser
);
9806 location_t rhs_loc
= c_parser_peek_token (parser
)->location
;
9807 rhs_expr
= c_parser_expression (parser
);
9808 rhs_expr
= default_function_array_read_conversion (rhs_loc
, rhs_expr
);
9810 rhs
= rhs_expr
.value
;
9811 rhs
= c_fully_fold (rhs
, false, NULL
);
9815 if (structured_block
&& code
== OMP_ATOMIC_CAPTURE_NEW
)
9817 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
9819 v
= c_parser_unary_expression (parser
).value
;
9820 v
= c_fully_fold (v
, false, NULL
);
9821 if (v
== error_mark_node
)
9823 if (!c_parser_require (parser
, CPP_EQ
, "expected %<=%>"))
9825 lhs1
= c_parser_unary_expression (parser
).value
;
9826 lhs1
= c_fully_fold (lhs1
, false, NULL
);
9827 if (lhs1
== error_mark_node
)
9830 if (structured_block
)
9832 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9833 c_parser_require (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
9836 stmt
= c_finish_omp_atomic (loc
, code
, opcode
, lhs
, rhs
, v
, lhs1
, rhs1
);
9837 if (stmt
!= error_mark_node
)
9840 if (!structured_block
)
9841 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9846 # pragma omp barrier new-line
9850 c_parser_omp_barrier (c_parser
*parser
)
9852 location_t loc
= c_parser_peek_token (parser
)->location
;
9853 c_parser_consume_pragma (parser
);
9854 c_parser_skip_to_pragma_eol (parser
);
9856 c_finish_omp_barrier (loc
);
9860 # pragma omp critical [(name)] new-line
9863 LOC is the location of the #pragma itself. */
9866 c_parser_omp_critical (location_t loc
, c_parser
*parser
)
9868 tree stmt
, name
= NULL
;
9870 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9872 c_parser_consume_token (parser
);
9873 if (c_parser_next_token_is (parser
, CPP_NAME
))
9875 name
= c_parser_peek_token (parser
)->value
;
9876 c_parser_consume_token (parser
);
9877 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9880 c_parser_error (parser
, "expected identifier");
9882 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9883 c_parser_error (parser
, "expected %<(%> or end of line");
9884 c_parser_skip_to_pragma_eol (parser
);
9886 stmt
= c_parser_omp_structured_block (parser
);
9887 return c_finish_omp_critical (loc
, stmt
, name
);
9891 # pragma omp flush flush-vars[opt] new-line
9894 ( variable-list ) */
9897 c_parser_omp_flush (c_parser
*parser
)
9899 location_t loc
= c_parser_peek_token (parser
)->location
;
9900 c_parser_consume_pragma (parser
);
9901 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9902 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9903 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9904 c_parser_error (parser
, "expected %<(%> or end of line");
9905 c_parser_skip_to_pragma_eol (parser
);
9907 c_finish_omp_flush (loc
);
9910 /* Parse the restricted form of the for statement allowed by OpenMP.
9911 The real trick here is to determine the loop control variable early
9912 so that we can push a new decl if necessary to make it private.
9913 LOC is the location of the OMP in "#pragma omp". */
9916 c_parser_omp_for_loop (location_t loc
,
9917 c_parser
*parser
, tree clauses
, tree
*par_clauses
)
9919 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
9920 tree declv
, condv
, incrv
, initv
, ret
= NULL
;
9921 bool fail
= false, open_brace_parsed
= false;
9922 int i
, collapse
= 1, nbraces
= 0;
9924 vec
<tree
, va_gc
> *for_block
= make_tree_vector ();
9926 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
9927 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
9928 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
9930 gcc_assert (collapse
>= 1);
9932 declv
= make_tree_vec (collapse
);
9933 initv
= make_tree_vec (collapse
);
9934 condv
= make_tree_vec (collapse
);
9935 incrv
= make_tree_vec (collapse
);
9937 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
9939 c_parser_error (parser
, "for statement expected");
9942 for_loc
= c_parser_peek_token (parser
)->location
;
9943 c_parser_consume_token (parser
);
9945 for (i
= 0; i
< collapse
; i
++)
9949 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9952 /* Parse the initialization declaration or expression. */
9953 if (c_parser_next_tokens_start_declaration (parser
))
9956 vec_safe_push (for_block
, c_begin_compound_stmt (true));
9957 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
9958 decl
= check_for_loop_decls (for_loc
, flag_isoc99
);
9961 if (DECL_INITIAL (decl
) == error_mark_node
)
9962 decl
= error_mark_node
;
9965 else if (c_parser_next_token_is (parser
, CPP_NAME
)
9966 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
9968 struct c_expr decl_exp
;
9969 struct c_expr init_exp
;
9970 location_t init_loc
;
9972 decl_exp
= c_parser_postfix_expression (parser
);
9973 decl
= decl_exp
.value
;
9975 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
9977 init_loc
= c_parser_peek_token (parser
)->location
;
9978 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
9979 init_exp
= default_function_array_read_conversion (init_loc
,
9981 init
= build_modify_expr (init_loc
, decl
, decl_exp
.original_type
,
9982 NOP_EXPR
, init_loc
, init_exp
.value
,
9983 init_exp
.original_type
);
9984 init
= c_process_expr_stmt (init_loc
, init
);
9986 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9991 c_parser_error (parser
,
9992 "expected iteration declaration or initialization");
9993 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
9999 /* Parse the loop condition. */
10001 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
10003 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
10004 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
,
10007 cond
= cond_expr
.value
;
10008 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
10009 cond
= c_fully_fold (cond
, false, NULL
);
10010 switch (cond_expr
.original_code
)
10018 /* Can't be cond = error_mark_node, because we want to preserve
10019 the location until c_finish_omp_for. */
10020 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
10023 protected_set_expr_location (cond
, cond_loc
);
10025 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
10027 /* Parse the increment expression. */
10029 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
10031 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
10033 incr
= c_process_expr_stmt (incr_loc
,
10034 c_parser_expression (parser
).value
);
10036 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
10038 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
10042 TREE_VEC_ELT (declv
, i
) = decl
;
10043 TREE_VEC_ELT (initv
, i
) = init
;
10044 TREE_VEC_ELT (condv
, i
) = cond
;
10045 TREE_VEC_ELT (incrv
, i
) = incr
;
10049 if (i
== collapse
- 1)
10052 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
10053 in between the collapsed for loops to be still considered perfectly
10054 nested. Hopefully the final version clarifies this.
10055 For now handle (multiple) {'s and empty statements. */
10058 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
10060 c_parser_consume_token (parser
);
10063 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
10065 c_parser_consume_token (parser
);
10068 else if (bracecount
10069 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
10070 c_parser_consume_token (parser
);
10073 c_parser_error (parser
, "not enough perfectly nested loops");
10076 open_brace_parsed
= true;
10086 nbraces
+= bracecount
;
10089 save_break
= c_break_label
;
10090 c_break_label
= size_one_node
;
10091 save_cont
= c_cont_label
;
10092 c_cont_label
= NULL_TREE
;
10093 body
= push_stmt_list ();
10095 if (open_brace_parsed
)
10097 location_t here
= c_parser_peek_token (parser
)->location
;
10098 stmt
= c_begin_compound_stmt (true);
10099 c_parser_compound_statement_nostart (parser
);
10100 add_stmt (c_end_compound_stmt (here
, stmt
, true));
10103 add_stmt (c_parser_c99_block_statement (parser
));
10106 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_cont_label
);
10107 SET_EXPR_LOCATION (t
, loc
);
10111 body
= pop_stmt_list (body
);
10112 c_break_label
= save_break
;
10113 c_cont_label
= save_cont
;
10117 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
10119 c_parser_consume_token (parser
);
10122 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
10123 c_parser_consume_token (parser
);
10126 c_parser_error (parser
, "collapsed loops not perfectly nested");
10129 location_t here
= c_parser_peek_token (parser
)->location
;
10130 stmt
= c_begin_compound_stmt (true);
10132 c_parser_compound_statement_nostart (parser
);
10133 body
= c_end_compound_stmt (here
, stmt
, true);
10140 /* Only bother calling c_finish_omp_for if we haven't already generated
10141 an error from the initialization parsing. */
10144 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
10147 if (par_clauses
!= NULL
)
10150 for (c
= par_clauses
; *c
; )
10151 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
10152 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
10153 c
= &OMP_CLAUSE_CHAIN (*c
);
10156 for (i
= 0; i
< collapse
; i
++)
10157 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
10160 c
= &OMP_CLAUSE_CHAIN (*c
);
10161 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
10164 "iteration variable %qD should not be firstprivate",
10165 OMP_CLAUSE_DECL (*c
));
10166 *c
= OMP_CLAUSE_CHAIN (*c
);
10170 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
10171 change it to shared (decl) in
10172 OMP_PARALLEL_CLAUSES. */
10173 tree l
= build_omp_clause (OMP_CLAUSE_LOCATION (*c
),
10174 OMP_CLAUSE_LASTPRIVATE
);
10175 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
10176 OMP_CLAUSE_CHAIN (l
) = clauses
;
10178 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
10182 OMP_FOR_CLAUSES (stmt
) = clauses
;
10187 while (!for_block
->is_empty ())
10189 /* FIXME diagnostics: LOC below should be the actual location of
10190 this particular for block. We need to build a list of
10191 locations to go along with FOR_BLOCK. */
10192 stmt
= c_end_compound_stmt (loc
, for_block
->pop (), true);
10195 release_tree_vector (for_block
);
10200 #pragma omp for for-clause[optseq] new-line
10203 LOC is the location of the #pragma token.
10206 #define OMP_FOR_CLAUSE_MASK \
10207 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
10208 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
10209 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
10210 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
10211 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
10212 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
10213 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
10214 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
10217 c_parser_omp_for (location_t loc
, c_parser
*parser
)
10219 tree block
, clauses
, ret
;
10221 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
10222 "#pragma omp for");
10224 block
= c_begin_compound_stmt (true);
10225 ret
= c_parser_omp_for_loop (loc
, parser
, clauses
, NULL
);
10226 block
= c_end_compound_stmt (loc
, block
, true);
10233 # pragma omp master new-line
10236 LOC is the location of the #pragma token.
10240 c_parser_omp_master (location_t loc
, c_parser
*parser
)
10242 c_parser_skip_to_pragma_eol (parser
);
10243 return c_finish_omp_master (loc
, c_parser_omp_structured_block (parser
));
10247 # pragma omp ordered new-line
10250 LOC is the location of the #pragma itself.
10254 c_parser_omp_ordered (location_t loc
, c_parser
*parser
)
10256 c_parser_skip_to_pragma_eol (parser
);
10257 return c_finish_omp_ordered (loc
, c_parser_omp_structured_block (parser
));
10263 { section-sequence }
10266 section-directive[opt] structured-block
10267 section-sequence section-directive structured-block
10269 SECTIONS_LOC is the location of the #pragma omp sections. */
10272 c_parser_omp_sections_scope (location_t sections_loc
, c_parser
*parser
)
10274 tree stmt
, substmt
;
10275 bool error_suppress
= false;
10278 loc
= c_parser_peek_token (parser
)->location
;
10279 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
10281 /* Avoid skipping until the end of the block. */
10282 parser
->error
= false;
10286 stmt
= push_stmt_list ();
10288 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
10290 substmt
= push_stmt_list ();
10294 c_parser_statement (parser
);
10296 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
10298 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
10300 if (c_parser_next_token_is (parser
, CPP_EOF
))
10304 substmt
= pop_stmt_list (substmt
);
10305 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
10306 SET_EXPR_LOCATION (substmt
, loc
);
10307 add_stmt (substmt
);
10312 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
10314 if (c_parser_next_token_is (parser
, CPP_EOF
))
10317 loc
= c_parser_peek_token (parser
)->location
;
10318 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
10320 c_parser_consume_pragma (parser
);
10321 c_parser_skip_to_pragma_eol (parser
);
10322 error_suppress
= false;
10324 else if (!error_suppress
)
10326 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
10327 error_suppress
= true;
10330 substmt
= c_parser_omp_structured_block (parser
);
10331 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
10332 SET_EXPR_LOCATION (substmt
, loc
);
10333 add_stmt (substmt
);
10335 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
10336 "expected %<#pragma omp section%> or %<}%>");
10338 substmt
= pop_stmt_list (stmt
);
10340 stmt
= make_node (OMP_SECTIONS
);
10341 SET_EXPR_LOCATION (stmt
, sections_loc
);
10342 TREE_TYPE (stmt
) = void_type_node
;
10343 OMP_SECTIONS_BODY (stmt
) = substmt
;
10345 return add_stmt (stmt
);
10349 # pragma omp sections sections-clause[optseq] newline
10352 LOC is the location of the #pragma token.
10355 #define OMP_SECTIONS_CLAUSE_MASK \
10356 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
10357 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
10358 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
10359 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
10360 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
10363 c_parser_omp_sections (location_t loc
, c_parser
*parser
)
10365 tree block
, clauses
, ret
;
10367 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
10368 "#pragma omp sections");
10370 block
= c_begin_compound_stmt (true);
10371 ret
= c_parser_omp_sections_scope (loc
, parser
);
10373 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
10374 block
= c_end_compound_stmt (loc
, block
, true);
10381 # pragma parallel parallel-clause new-line
10382 # pragma parallel for parallel-for-clause new-line
10383 # pragma parallel sections parallel-sections-clause new-line
10385 LOC is the location of the #pragma token.
10388 #define OMP_PARALLEL_CLAUSE_MASK \
10389 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
10390 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
10391 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
10392 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
10393 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
10394 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
10395 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
10396 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
10399 c_parser_omp_parallel (location_t loc
, c_parser
*parser
)
10401 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
10402 const char *p_name
= "#pragma omp parallel";
10403 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
10404 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
10406 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
10408 c_parser_consume_token (parser
);
10409 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
10410 p_name
= "#pragma omp parallel for";
10411 mask
|= OMP_FOR_CLAUSE_MASK
;
10412 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
10414 else if (c_parser_next_token_is (parser
, CPP_NAME
))
10416 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
10417 if (strcmp (p
, "sections") == 0)
10419 c_parser_consume_token (parser
);
10420 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
10421 p_name
= "#pragma omp parallel sections";
10422 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
10423 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
10427 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
10431 case PRAGMA_OMP_PARALLEL
:
10432 block
= c_begin_omp_parallel ();
10433 c_parser_statement (parser
);
10434 stmt
= c_finish_omp_parallel (loc
, clauses
, block
);
10437 case PRAGMA_OMP_PARALLEL_FOR
:
10438 block
= c_begin_omp_parallel ();
10439 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
10440 c_parser_omp_for_loop (loc
, parser
, ws_clause
, &par_clause
);
10441 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
10442 OMP_PARALLEL_COMBINED (stmt
) = 1;
10445 case PRAGMA_OMP_PARALLEL_SECTIONS
:
10446 block
= c_begin_omp_parallel ();
10447 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
10448 stmt
= c_parser_omp_sections_scope (loc
, parser
);
10450 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
10451 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
10452 OMP_PARALLEL_COMBINED (stmt
) = 1;
10456 gcc_unreachable ();
10463 # pragma omp single single-clause[optseq] new-line
10466 LOC is the location of the #pragma.
10469 #define OMP_SINGLE_CLAUSE_MASK \
10470 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
10471 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
10472 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
10473 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
10476 c_parser_omp_single (location_t loc
, c_parser
*parser
)
10478 tree stmt
= make_node (OMP_SINGLE
);
10479 SET_EXPR_LOCATION (stmt
, loc
);
10480 TREE_TYPE (stmt
) = void_type_node
;
10482 OMP_SINGLE_CLAUSES (stmt
)
10483 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
10484 "#pragma omp single");
10485 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
10487 return add_stmt (stmt
);
10491 # pragma omp task task-clause[optseq] new-line
10493 LOC is the location of the #pragma.
10496 #define OMP_TASK_CLAUSE_MASK \
10497 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
10498 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
10499 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
10500 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
10501 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
10502 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
10503 | (1u << PRAGMA_OMP_CLAUSE_FINAL) \
10504 | (1u << PRAGMA_OMP_CLAUSE_MERGEABLE))
10507 c_parser_omp_task (location_t loc
, c_parser
*parser
)
10509 tree clauses
, block
;
10511 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
10512 "#pragma omp task");
10514 block
= c_begin_omp_task ();
10515 c_parser_statement (parser
);
10516 return c_finish_omp_task (loc
, clauses
, block
);
10520 # pragma omp taskwait new-line
10524 c_parser_omp_taskwait (c_parser
*parser
)
10526 location_t loc
= c_parser_peek_token (parser
)->location
;
10527 c_parser_consume_pragma (parser
);
10528 c_parser_skip_to_pragma_eol (parser
);
10530 c_finish_omp_taskwait (loc
);
10534 # pragma omp taskyield new-line
10538 c_parser_omp_taskyield (c_parser
*parser
)
10540 location_t loc
= c_parser_peek_token (parser
)->location
;
10541 c_parser_consume_pragma (parser
);
10542 c_parser_skip_to_pragma_eol (parser
);
10544 c_finish_omp_taskyield (loc
);
10547 /* Main entry point to parsing most OpenMP pragmas. */
10550 c_parser_omp_construct (c_parser
*parser
)
10552 enum pragma_kind p_kind
;
10556 loc
= c_parser_peek_token (parser
)->location
;
10557 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
10558 c_parser_consume_pragma (parser
);
10562 case PRAGMA_OMP_ATOMIC
:
10563 c_parser_omp_atomic (loc
, parser
);
10565 case PRAGMA_OMP_CRITICAL
:
10566 stmt
= c_parser_omp_critical (loc
, parser
);
10568 case PRAGMA_OMP_FOR
:
10569 stmt
= c_parser_omp_for (loc
, parser
);
10571 case PRAGMA_OMP_MASTER
:
10572 stmt
= c_parser_omp_master (loc
, parser
);
10574 case PRAGMA_OMP_ORDERED
:
10575 stmt
= c_parser_omp_ordered (loc
, parser
);
10577 case PRAGMA_OMP_PARALLEL
:
10578 stmt
= c_parser_omp_parallel (loc
, parser
);
10580 case PRAGMA_OMP_SECTIONS
:
10581 stmt
= c_parser_omp_sections (loc
, parser
);
10583 case PRAGMA_OMP_SINGLE
:
10584 stmt
= c_parser_omp_single (loc
, parser
);
10586 case PRAGMA_OMP_TASK
:
10587 stmt
= c_parser_omp_task (loc
, parser
);
10590 gcc_unreachable ();
10594 gcc_assert (EXPR_LOCATION (stmt
) != UNKNOWN_LOCATION
);
10599 # pragma omp threadprivate (variable-list) */
10602 c_parser_omp_threadprivate (c_parser
*parser
)
10607 c_parser_consume_pragma (parser
);
10608 loc
= c_parser_peek_token (parser
)->location
;
10609 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
10611 /* Mark every variable in VARS to be assigned thread local storage. */
10612 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
10614 tree v
= TREE_PURPOSE (t
);
10616 /* FIXME diagnostics: Ideally we should keep individual
10617 locations for all the variables in the var list to make the
10618 following errors more precise. Perhaps
10619 c_parser_omp_var_list_parens() should construct a list of
10620 locations to go along with the var list. */
10622 /* If V had already been marked threadprivate, it doesn't matter
10623 whether it had been used prior to this point. */
10624 if (TREE_CODE (v
) != VAR_DECL
)
10625 error_at (loc
, "%qD is not a variable", v
);
10626 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
10627 error_at (loc
, "%qE declared %<threadprivate%> after first use", v
);
10628 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
10629 error_at (loc
, "automatic variable %qE cannot be %<threadprivate%>", v
);
10630 else if (TREE_TYPE (v
) == error_mark_node
)
10632 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
10633 error_at (loc
, "%<threadprivate%> %qE has incomplete type", v
);
10636 if (! DECL_THREAD_LOCAL_P (v
))
10638 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
10639 /* If rtl has been already set for this var, call
10640 make_decl_rtl once again, so that encode_section_info
10641 has a chance to look at the new decl flags. */
10642 if (DECL_RTL_SET_P (v
))
10645 C_DECL_THREADPRIVATE_P (v
) = 1;
10649 c_parser_skip_to_pragma_eol (parser
);
10652 /* Parse a transaction attribute (GCC Extension).
10654 transaction-attribute:
10658 The transactional memory language description is written for C++,
10659 and uses the C++0x attribute syntax. For compatibility, allow the
10660 bracket style for transactions in C as well. */
10663 c_parser_transaction_attributes (c_parser
*parser
)
10665 tree attr_name
, attr
= NULL
;
10667 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
10668 return c_parser_attributes (parser
);
10670 if (!c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
10672 c_parser_consume_token (parser
);
10673 if (!c_parser_require (parser
, CPP_OPEN_SQUARE
, "expected %<[%>"))
10676 attr_name
= c_parser_attribute_any_word (parser
);
10679 c_parser_consume_token (parser
);
10680 attr
= build_tree_list (attr_name
, NULL_TREE
);
10683 c_parser_error (parser
, "expected identifier");
10685 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, "expected %<]%>");
10687 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, "expected %<]%>");
10691 /* Parse a __transaction_atomic or __transaction_relaxed statement
10694 transaction-statement:
10695 __transaction_atomic transaction-attribute[opt] compound-statement
10696 __transaction_relaxed compound-statement
10698 Note that the only valid attribute is: "outer".
10702 c_parser_transaction (c_parser
*parser
, enum rid keyword
)
10704 unsigned int old_in
= parser
->in_transaction
;
10705 unsigned int this_in
= 1, new_in
;
10706 location_t loc
= c_parser_peek_token (parser
)->location
;
10709 gcc_assert ((keyword
== RID_TRANSACTION_ATOMIC
10710 || keyword
== RID_TRANSACTION_RELAXED
)
10711 && c_parser_next_token_is_keyword (parser
, keyword
));
10712 c_parser_consume_token (parser
);
10714 if (keyword
== RID_TRANSACTION_RELAXED
)
10715 this_in
|= TM_STMT_ATTR_RELAXED
;
10718 attrs
= c_parser_transaction_attributes (parser
);
10720 this_in
|= parse_tm_stmt_attr (attrs
, TM_STMT_ATTR_OUTER
);
10723 /* Keep track if we're in the lexical scope of an outer transaction. */
10724 new_in
= this_in
| (old_in
& TM_STMT_ATTR_OUTER
);
10726 parser
->in_transaction
= new_in
;
10727 stmt
= c_parser_compound_statement (parser
);
10728 parser
->in_transaction
= old_in
;
10731 stmt
= c_finish_transaction (loc
, stmt
, this_in
);
10733 error_at (loc
, (keyword
== RID_TRANSACTION_ATOMIC
?
10734 "%<__transaction_atomic%> without transactional memory support enabled"
10735 : "%<__transaction_relaxed %> "
10736 "without transactional memory support enabled"));
10741 /* Parse a __transaction_atomic or __transaction_relaxed expression
10744 transaction-expression:
10745 __transaction_atomic ( expression )
10746 __transaction_relaxed ( expression )
10749 static struct c_expr
10750 c_parser_transaction_expression (c_parser
*parser
, enum rid keyword
)
10753 unsigned int old_in
= parser
->in_transaction
;
10754 unsigned int this_in
= 1;
10755 location_t loc
= c_parser_peek_token (parser
)->location
;
10758 gcc_assert ((keyword
== RID_TRANSACTION_ATOMIC
10759 || keyword
== RID_TRANSACTION_RELAXED
)
10760 && c_parser_next_token_is_keyword (parser
, keyword
));
10761 c_parser_consume_token (parser
);
10763 if (keyword
== RID_TRANSACTION_RELAXED
)
10764 this_in
|= TM_STMT_ATTR_RELAXED
;
10767 attrs
= c_parser_transaction_attributes (parser
);
10769 this_in
|= parse_tm_stmt_attr (attrs
, 0);
10772 parser
->in_transaction
= this_in
;
10773 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
10775 tree expr
= c_parser_expression (parser
).value
;
10776 ret
.original_type
= TREE_TYPE (expr
);
10777 ret
.value
= build1 (TRANSACTION_EXPR
, ret
.original_type
, expr
);
10778 if (this_in
& TM_STMT_ATTR_RELAXED
)
10779 TRANSACTION_EXPR_RELAXED (ret
.value
) = 1;
10780 SET_EXPR_LOCATION (ret
.value
, loc
);
10781 ret
.original_code
= TRANSACTION_EXPR
;
10782 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
10784 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
10791 ret
.value
= error_mark_node
;
10792 ret
.original_code
= ERROR_MARK
;
10793 ret
.original_type
= NULL
;
10795 parser
->in_transaction
= old_in
;
10798 error_at (loc
, (keyword
== RID_TRANSACTION_ATOMIC
?
10799 "%<__transaction_atomic%> without transactional memory support enabled"
10800 : "%<__transaction_relaxed %> "
10801 "without transactional memory support enabled"));
10806 /* Parse a __transaction_cancel statement (GCC Extension).
10808 transaction-cancel-statement:
10809 __transaction_cancel transaction-attribute[opt] ;
10811 Note that the only valid attribute is "outer".
10815 c_parser_transaction_cancel(c_parser
*parser
)
10817 location_t loc
= c_parser_peek_token (parser
)->location
;
10819 bool is_outer
= false;
10821 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TRANSACTION_CANCEL
));
10822 c_parser_consume_token (parser
);
10824 attrs
= c_parser_transaction_attributes (parser
);
10826 is_outer
= (parse_tm_stmt_attr (attrs
, TM_STMT_ATTR_OUTER
) != 0);
10830 error_at (loc
, "%<__transaction_cancel%> without "
10831 "transactional memory support enabled");
10834 else if (parser
->in_transaction
& TM_STMT_ATTR_RELAXED
)
10836 error_at (loc
, "%<__transaction_cancel%> within a "
10837 "%<__transaction_relaxed%>");
10842 if ((parser
->in_transaction
& TM_STMT_ATTR_OUTER
) == 0
10843 && !is_tm_may_cancel_outer (current_function_decl
))
10845 error_at (loc
, "outer %<__transaction_cancel%> not "
10846 "within outer %<__transaction_atomic%>");
10847 error_at (loc
, " or a %<transaction_may_cancel_outer%> function");
10851 else if (parser
->in_transaction
== 0)
10853 error_at (loc
, "%<__transaction_cancel%> not within "
10854 "%<__transaction_atomic%>");
10858 return add_stmt (build_tm_abort_call (loc
, is_outer
));
10861 return build1 (NOP_EXPR
, void_type_node
, error_mark_node
);
10864 /* Parse a single source file. */
10867 c_parse_file (void)
10869 /* Use local storage to begin. If the first token is a pragma, parse it.
10870 If it is #pragma GCC pch_preprocess, then this will load a PCH file
10871 which will cause garbage collection. */
10874 memset (&tparser
, 0, sizeof tparser
);
10875 the_parser
= &tparser
;
10877 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
10878 c_parser_pragma_pch_preprocess (&tparser
);
10880 the_parser
= ggc_alloc_c_parser ();
10881 *the_parser
= tparser
;
10883 /* Initialize EH, if we've been told to do so. */
10884 if (flag_exceptions
)
10885 using_eh_for_cleanups ();
10887 c_parser_translation_unit (the_parser
);
10891 #include "gt-c-c-parser.h"