1 /* Parser for C and Objective-C.
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 Parser actions based on the old Bison parser; structure somewhat
7 influenced by and fragments based on the C++ parser.
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 3, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
27 Make sure all relevant comments, and all relevant code from all
28 actions, brought over from old parser. Verify exact correspondence
31 Add testcases covering every input symbol in every state in old and
34 Include full syntax for GNU C, including erroneous cases accepted
35 with error messages, in syntax productions in comments.
37 Make more diagnostics in the front end generally take an explicit
38 location rather than implicitly using input_location. */
42 #include "coretypes.h"
43 #include "tm.h" /* For rtl.h: needs enum reg_class. */
45 #include "langhooks.h"
49 #include "c-family/c-pragma.h"
54 #include "c-family/c-common.h"
55 #include "c-family/c-objc.h"
62 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
73 /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in
74 the c_token structure. */
75 gcc_assert (RID_MAX
<= 255);
82 mask
|= D_ASM
| D_EXT
;
86 if (!c_dialect_objc ())
87 mask
|= D_OBJC
| D_CXX_OBJC
;
89 ridpointers
= ggc_alloc_cleared_vec_tree ((int) RID_MAX
);
90 for (i
= 0; i
< num_c_common_reswords
; i
++)
92 /* If a keyword is disabled, do not enter it into the table
93 and so create a canonical spelling that isn't a keyword. */
94 if (c_common_reswords
[i
].disable
& mask
)
97 && (c_common_reswords
[i
].disable
& D_CXXWARN
))
99 id
= get_identifier (c_common_reswords
[i
].word
);
100 C_SET_RID_CODE (id
, RID_CXX_COMPAT_WARN
);
101 C_IS_RESERVED_WORD (id
) = 1;
106 id
= get_identifier (c_common_reswords
[i
].word
);
107 C_SET_RID_CODE (id
, c_common_reswords
[i
].rid
);
108 C_IS_RESERVED_WORD (id
) = 1;
109 ridpointers
[(int) c_common_reswords
[i
].rid
] = id
;
113 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
114 and the C parser. Unlike the C++ lexer, the parser structure
115 stores the lexer information instead of using a separate structure.
116 Identifiers are separated into ordinary identifiers, type names,
117 keywords and some other Objective-C types of identifiers, and some
118 look-ahead is maintained.
120 ??? It might be a good idea to lex the whole file up front (as for
121 C++). It would then be possible to share more of the C and C++
122 lexer code, if desired. */
124 /* The following local token type is used. */
127 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
129 /* More information about the type of a CPP_NAME token. */
130 typedef enum c_id_kind
{
131 /* An ordinary identifier. */
133 /* An identifier declared as a typedef name. */
135 /* An identifier declared as an Objective-C class name. */
137 /* An address space identifier. */
139 /* Not an identifier. */
143 /* A single C token after string literal concatenation and conversion
144 of preprocessing tokens to tokens. */
145 typedef struct GTY (()) c_token
{
146 /* The kind of token. */
147 ENUM_BITFIELD (cpp_ttype
) type
: 8;
148 /* If this token is a CPP_NAME, this value indicates whether also
149 declared as some kind of type. Otherwise, it is C_ID_NONE. */
150 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
151 /* If this token is a keyword, this value indicates which keyword.
152 Otherwise, this value is RID_MAX. */
153 ENUM_BITFIELD (rid
) keyword
: 8;
154 /* If this token is a CPP_PRAGMA, this indicates the pragma that
155 was seen. Otherwise it is PRAGMA_NONE. */
156 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 8;
157 /* The location at which this token was found. */
159 /* The value associated with this token, if any. */
163 /* A parser structure recording information about the state and
164 context of parsing. Includes lexer information with up to two
165 tokens of look-ahead; more are not needed for C. */
166 typedef struct GTY(()) c_parser
{
167 /* The look-ahead tokens. */
169 /* How many look-ahead tokens are available (0, 1 or 2). */
171 /* True if a syntax error is being recovered from; false otherwise.
172 c_parser_error sets this flag. It should clear this flag when
173 enough tokens have been consumed to recover from the error. */
174 BOOL_BITFIELD error
: 1;
175 /* True if we're processing a pragma, and shouldn't automatically
176 consume CPP_PRAGMA_EOL. */
177 BOOL_BITFIELD in_pragma
: 1;
178 /* True if we're parsing the outermost block of an if statement. */
179 BOOL_BITFIELD in_if_block
: 1;
180 /* True if we want to lex an untranslated string. */
181 BOOL_BITFIELD lex_untranslated_string
: 1;
183 /* Objective-C specific parser/lexer information. */
185 /* True if we are in a context where the Objective-C "PQ" keywords
186 are considered keywords. */
187 BOOL_BITFIELD objc_pq_context
: 1;
188 /* True if we are parsing a (potential) Objective-C foreach
189 statement. This is set to true after we parsed 'for (' and while
190 we wait for 'in' or ';' to decide if it's a standard C for loop or an
191 Objective-C foreach loop. */
192 BOOL_BITFIELD objc_could_be_foreach_context
: 1;
193 /* The following flag is needed to contextualize Objective-C lexical
194 analysis. In some cases (e.g., 'int NSObject;'), it is
195 undesirable to bind an identifier to an Objective-C class, even
196 if a class with that name exists. */
197 BOOL_BITFIELD objc_need_raw_identifier
: 1;
198 /* True if we are in a context where the Objective-C "Property attribute"
199 keywords are valid. */
200 BOOL_BITFIELD objc_property_attr_context
: 1;
204 /* The actual parser and external interface. ??? Does this need to be
205 garbage-collected? */
207 static GTY (()) c_parser
*the_parser
;
209 /* Read in and lex a single token, storing it in *TOKEN. */
212 c_lex_one_token (c_parser
*parser
, c_token
*token
)
214 timevar_push (TV_LEX
);
216 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
,
217 (parser
->lex_untranslated_string
218 ? C_LEX_STRING_NO_TRANSLATE
: 0));
219 token
->id_kind
= C_ID_NONE
;
220 token
->keyword
= RID_MAX
;
221 token
->pragma_kind
= PRAGMA_NONE
;
229 bool objc_force_identifier
= parser
->objc_need_raw_identifier
;
230 if (c_dialect_objc ())
231 parser
->objc_need_raw_identifier
= false;
233 if (C_IS_RESERVED_WORD (token
->value
))
235 enum rid rid_code
= C_RID_CODE (token
->value
);
237 if (rid_code
== RID_CXX_COMPAT_WARN
)
239 warning_at (token
->location
,
241 "identifier %qE conflicts with C++ keyword",
244 else if (rid_code
>= RID_FIRST_ADDR_SPACE
245 && rid_code
<= RID_LAST_ADDR_SPACE
)
247 token
->id_kind
= C_ID_ADDRSPACE
;
248 token
->keyword
= rid_code
;
251 else if (c_dialect_objc () && OBJC_IS_PQ_KEYWORD (rid_code
))
253 /* We found an Objective-C "pq" keyword (in, out,
254 inout, bycopy, byref, oneway). They need special
255 care because the interpretation depends on the
257 if (parser
->objc_pq_context
)
259 token
->type
= CPP_KEYWORD
;
260 token
->keyword
= rid_code
;
263 else if (parser
->objc_could_be_foreach_context
264 && rid_code
== RID_IN
)
266 /* We are in Objective-C, inside a (potential)
267 foreach context (which means after having
268 parsed 'for (', but before having parsed ';'),
269 and we found 'in'. We consider it the keyword
270 which terminates the declaration at the
271 beginning of a foreach-statement. Note that
272 this means you can't use 'in' for anything else
273 in that context; in particular, in Objective-C
274 you can't use 'in' as the name of the running
275 variable in a C for loop. We could potentially
276 try to add code here to disambiguate, but it
277 seems a reasonable limitation. */
278 token
->type
= CPP_KEYWORD
;
279 token
->keyword
= rid_code
;
282 /* Else, "pq" keywords outside of the "pq" context are
283 not keywords, and we fall through to the code for
286 else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code
))
288 /* We found an Objective-C "property attribute"
289 keyword (getter, setter, readonly, etc). These are
290 only valid in the property context. */
291 if (parser
->objc_property_attr_context
)
293 token
->type
= CPP_KEYWORD
;
294 token
->keyword
= rid_code
;
297 /* Else they are not special keywords.
300 else if (c_dialect_objc ()
301 && (OBJC_IS_AT_KEYWORD (rid_code
)
302 || OBJC_IS_CXX_KEYWORD (rid_code
)))
304 /* We found one of the Objective-C "@" keywords (defs,
305 selector, synchronized, etc) or one of the
306 Objective-C "cxx" keywords (class, private,
307 protected, public, try, catch, throw) without a
308 preceding '@' sign. Do nothing and fall through to
309 the code for normal tokens (in C++ we would still
310 consider the CXX ones keywords, but not in C). */
315 token
->type
= CPP_KEYWORD
;
316 token
->keyword
= rid_code
;
321 decl
= lookup_name (token
->value
);
324 if (TREE_CODE (decl
) == TYPE_DECL
)
326 token
->id_kind
= C_ID_TYPENAME
;
330 else if (c_dialect_objc ())
332 tree objc_interface_decl
= objc_is_class_name (token
->value
);
333 /* Objective-C class names are in the same namespace as
334 variables and typedefs, and hence are shadowed by local
336 if (objc_interface_decl
337 && (!objc_force_identifier
|| global_bindings_p ()))
339 token
->value
= objc_interface_decl
;
340 token
->id_kind
= C_ID_CLASSNAME
;
344 token
->id_kind
= C_ID_ID
;
348 /* This only happens in Objective-C; it must be a keyword. */
349 token
->type
= CPP_KEYWORD
;
350 switch (C_RID_CODE (token
->value
))
352 /* Replace 'class' with '@class', 'private' with '@private',
353 etc. This prevents confusion with the C++ keyword
354 'class', and makes the tokens consistent with other
355 Objective-C 'AT' keywords. For example '@class' is
356 reported as RID_AT_CLASS which is consistent with
357 '@synchronized', which is reported as
360 case RID_CLASS
: token
->keyword
= RID_AT_CLASS
; break;
361 case RID_PRIVATE
: token
->keyword
= RID_AT_PRIVATE
; break;
362 case RID_PROTECTED
: token
->keyword
= RID_AT_PROTECTED
; break;
363 case RID_PUBLIC
: token
->keyword
= RID_AT_PUBLIC
; break;
364 case RID_THROW
: token
->keyword
= RID_AT_THROW
; break;
365 case RID_TRY
: token
->keyword
= RID_AT_TRY
; break;
366 case RID_CATCH
: token
->keyword
= RID_AT_CATCH
; break;
367 default: token
->keyword
= C_RID_CODE (token
->value
);
372 case CPP_CLOSE_PAREN
:
374 /* These tokens may affect the interpretation of any identifiers
375 following, if doing Objective-C. */
376 if (c_dialect_objc ())
377 parser
->objc_need_raw_identifier
= false;
380 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
381 token
->pragma_kind
= (enum pragma_kind
) TREE_INT_CST_LOW (token
->value
);
387 timevar_pop (TV_LEX
);
390 /* Return a pointer to the next token from PARSER, reading it in if
393 static inline c_token
*
394 c_parser_peek_token (c_parser
*parser
)
396 if (parser
->tokens_avail
== 0)
398 c_lex_one_token (parser
, &parser
->tokens
[0]);
399 parser
->tokens_avail
= 1;
401 return &parser
->tokens
[0];
404 /* Return true if the next token from PARSER has the indicated
408 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
410 return c_parser_peek_token (parser
)->type
== type
;
413 /* Return true if the next token from PARSER does not have the
417 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
419 return !c_parser_next_token_is (parser
, type
);
422 /* Return true if the next token from PARSER is the indicated
426 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
428 return c_parser_peek_token (parser
)->keyword
== keyword
;
431 /* Return a pointer to the next-but-one token from PARSER, reading it
432 in if necessary. The next token is already read in. */
435 c_parser_peek_2nd_token (c_parser
*parser
)
437 if (parser
->tokens_avail
>= 2)
438 return &parser
->tokens
[1];
439 gcc_assert (parser
->tokens_avail
== 1);
440 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
441 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
442 c_lex_one_token (parser
, &parser
->tokens
[1]);
443 parser
->tokens_avail
= 2;
444 return &parser
->tokens
[1];
447 /* Return true if TOKEN can start a type name,
450 c_token_starts_typename (c_token
*token
)
455 switch (token
->id_kind
)
464 gcc_assert (c_dialect_objc ());
470 switch (token
->keyword
)
503 if (c_dialect_objc ())
511 enum c_lookahead_kind
{
512 /* Always treat unknown identifiers as typenames. */
515 /* Could be parsing a nonabstract declarator. Only treat an identifier
516 as a typename if followed by another identifier or a star. */
517 cla_nonabstract_decl
,
519 /* Never treat identifiers as typenames. */
523 /* Return true if the next token from PARSER can start a type name,
524 false otherwise. LA specifies how to do lookahead in order to
525 detect unknown type names. If unsure, pick CLA_PREFER_ID. */
528 c_parser_next_tokens_start_typename (c_parser
*parser
, enum c_lookahead_kind la
)
530 c_token
*token
= c_parser_peek_token (parser
);
531 if (c_token_starts_typename (token
))
534 /* Try a bit harder to detect an unknown typename. */
535 if (la
!= cla_prefer_id
536 && token
->type
== CPP_NAME
537 && token
->id_kind
== C_ID_ID
539 /* Do not try too hard when we could have "object in array". */
540 && !parser
->objc_could_be_foreach_context
542 && (la
== cla_prefer_type
543 || c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
544 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
546 /* Only unknown identifiers. */
547 && !lookup_name (token
->value
))
553 /* Return true if TOKEN is a type qualifier, false otherwise. */
555 c_token_is_qualifier (c_token
*token
)
560 switch (token
->id_kind
)
568 switch (token
->keyword
)
585 /* Return true if the next token from PARSER is a type qualifier,
588 c_parser_next_token_is_qualifier (c_parser
*parser
)
590 c_token
*token
= c_parser_peek_token (parser
);
591 return c_token_is_qualifier (token
);
594 /* Return true if TOKEN can start declaration specifiers, false
597 c_token_starts_declspecs (c_token
*token
)
602 switch (token
->id_kind
)
611 gcc_assert (c_dialect_objc ());
617 switch (token
->keyword
)
657 if (c_dialect_objc ())
666 /* Return true if TOKEN can start declaration specifiers or a static
667 assertion, false otherwise. */
669 c_token_starts_declaration (c_token
*token
)
671 if (c_token_starts_declspecs (token
)
672 || token
->keyword
== RID_STATIC_ASSERT
)
678 /* Return true if the next token from PARSER can start declaration
679 specifiers, false otherwise. */
681 c_parser_next_token_starts_declspecs (c_parser
*parser
)
683 c_token
*token
= c_parser_peek_token (parser
);
685 /* In Objective-C, a classname normally starts a declspecs unless it
686 is immediately followed by a dot. In that case, it is the
687 Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
688 setter/getter on the class. c_token_starts_declspecs() can't
689 differentiate between the two cases because it only checks the
690 current token, so we have a special check here. */
691 if (c_dialect_objc ()
692 && token
->type
== CPP_NAME
693 && token
->id_kind
== C_ID_CLASSNAME
694 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
697 return c_token_starts_declspecs (token
);
700 /* Return true if the next tokens from PARSER can start declaration
701 specifiers or a static assertion, false otherwise. */
703 c_parser_next_tokens_start_declaration (c_parser
*parser
)
705 c_token
*token
= c_parser_peek_token (parser
);
708 if (c_dialect_objc ()
709 && token
->type
== CPP_NAME
710 && token
->id_kind
== C_ID_CLASSNAME
711 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
714 /* Labels do not start declarations. */
715 if (token
->type
== CPP_NAME
716 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
719 if (c_token_starts_declaration (token
))
722 if (c_parser_next_tokens_start_typename (parser
, cla_nonabstract_decl
))
728 /* Consume the next token from PARSER. */
731 c_parser_consume_token (c_parser
*parser
)
733 gcc_assert (parser
->tokens_avail
>= 1);
734 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
735 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
736 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
737 if (parser
->tokens_avail
== 2)
738 parser
->tokens
[0] = parser
->tokens
[1];
739 parser
->tokens_avail
--;
742 /* Expect the current token to be a #pragma. Consume it and remember
743 that we've begun parsing a pragma. */
746 c_parser_consume_pragma (c_parser
*parser
)
748 gcc_assert (!parser
->in_pragma
);
749 gcc_assert (parser
->tokens_avail
>= 1);
750 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
751 if (parser
->tokens_avail
== 2)
752 parser
->tokens
[0] = parser
->tokens
[1];
753 parser
->tokens_avail
--;
754 parser
->in_pragma
= true;
757 /* Update the globals input_location and in_system_header from
760 c_parser_set_source_position_from_token (c_token
*token
)
762 if (token
->type
!= CPP_EOF
)
764 input_location
= token
->location
;
768 /* Issue a diagnostic of the form
769 FILE:LINE: MESSAGE before TOKEN
770 where TOKEN is the next token in the input stream of PARSER.
771 MESSAGE (specified by the caller) is usually of the form "expected
774 Do not issue a diagnostic if still recovering from an error.
776 ??? This is taken from the C++ parser, but building up messages in
777 this way is not i18n-friendly and some other approach should be
781 c_parser_error (c_parser
*parser
, const char *gmsgid
)
783 c_token
*token
= c_parser_peek_token (parser
);
786 parser
->error
= true;
789 /* This diagnostic makes more sense if it is tagged to the line of
790 the token we just peeked at. */
791 c_parser_set_source_position_from_token (token
);
792 c_parse_error (gmsgid
,
793 /* Because c_parse_error does not understand
794 CPP_KEYWORD, keywords are treated like
796 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
797 /* ??? The C parser does not save the cpp flags of a
798 token, we need to pass 0 here and we will not get
799 the source spelling of some tokens but rather the
800 canonical spelling. */
801 token
->value
, /*flags=*/0);
804 /* If the next token is of the indicated TYPE, consume it. Otherwise,
805 issue the error MSGID. If MSGID is NULL then a message has already
806 been produced and no message will be produced this time. Returns
807 true if found, false otherwise. */
810 c_parser_require (c_parser
*parser
,
814 if (c_parser_next_token_is (parser
, type
))
816 c_parser_consume_token (parser
);
821 c_parser_error (parser
, msgid
);
826 /* If the next token is the indicated keyword, consume it. Otherwise,
827 issue the error MSGID. Returns true if found, false otherwise. */
830 c_parser_require_keyword (c_parser
*parser
,
834 if (c_parser_next_token_is_keyword (parser
, keyword
))
836 c_parser_consume_token (parser
);
841 c_parser_error (parser
, msgid
);
846 /* Like c_parser_require, except that tokens will be skipped until the
847 desired token is found. An error message is still produced if the
848 next token is not as expected. If MSGID is NULL then a message has
849 already been produced and no message will be produced this
853 c_parser_skip_until_found (c_parser
*parser
,
857 unsigned nesting_depth
= 0;
859 if (c_parser_require (parser
, type
, msgid
))
862 /* Skip tokens until the desired token is found. */
865 /* Peek at the next token. */
866 c_token
*token
= c_parser_peek_token (parser
);
867 /* If we've reached the token we want, consume it and stop. */
868 if (token
->type
== type
&& !nesting_depth
)
870 c_parser_consume_token (parser
);
874 /* If we've run out of tokens, stop. */
875 if (token
->type
== CPP_EOF
)
877 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
879 if (token
->type
== CPP_OPEN_BRACE
880 || token
->type
== CPP_OPEN_PAREN
881 || token
->type
== CPP_OPEN_SQUARE
)
883 else if (token
->type
== CPP_CLOSE_BRACE
884 || token
->type
== CPP_CLOSE_PAREN
885 || token
->type
== CPP_CLOSE_SQUARE
)
887 if (nesting_depth
-- == 0)
890 /* Consume this token. */
891 c_parser_consume_token (parser
);
893 parser
->error
= false;
896 /* Skip tokens until the end of a parameter is found, but do not
897 consume the comma, semicolon or closing delimiter. */
900 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
902 unsigned nesting_depth
= 0;
906 c_token
*token
= c_parser_peek_token (parser
);
907 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
910 /* If we've run out of tokens, stop. */
911 if (token
->type
== CPP_EOF
)
913 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
915 if (token
->type
== CPP_OPEN_BRACE
916 || token
->type
== CPP_OPEN_PAREN
917 || token
->type
== CPP_OPEN_SQUARE
)
919 else if (token
->type
== CPP_CLOSE_BRACE
920 || token
->type
== CPP_CLOSE_PAREN
921 || token
->type
== CPP_CLOSE_SQUARE
)
923 if (nesting_depth
-- == 0)
926 /* Consume this token. */
927 c_parser_consume_token (parser
);
929 parser
->error
= false;
932 /* Expect to be at the end of the pragma directive and consume an
933 end of line marker. */
936 c_parser_skip_to_pragma_eol (c_parser
*parser
)
938 gcc_assert (parser
->in_pragma
);
939 parser
->in_pragma
= false;
941 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
944 c_token
*token
= c_parser_peek_token (parser
);
945 if (token
->type
== CPP_EOF
)
947 if (token
->type
== CPP_PRAGMA_EOL
)
949 c_parser_consume_token (parser
);
952 c_parser_consume_token (parser
);
955 parser
->error
= false;
958 /* Skip tokens until we have consumed an entire block, or until we
959 have consumed a non-nested ';'. */
962 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
964 unsigned nesting_depth
= 0;
965 bool save_error
= parser
->error
;
971 /* Peek at the next token. */
972 token
= c_parser_peek_token (parser
);
980 if (parser
->in_pragma
)
985 /* If the next token is a ';', we have reached the
986 end of the statement. */
989 /* Consume the ';'. */
990 c_parser_consume_token (parser
);
995 case CPP_CLOSE_BRACE
:
996 /* If the next token is a non-nested '}', then we have
997 reached the end of the current block. */
998 if (nesting_depth
== 0 || --nesting_depth
== 0)
1000 c_parser_consume_token (parser
);
1005 case CPP_OPEN_BRACE
:
1006 /* If it the next token is a '{', then we are entering a new
1007 block. Consume the entire block. */
1012 /* If we see a pragma, consume the whole thing at once. We
1013 have some safeguards against consuming pragmas willy-nilly.
1014 Normally, we'd expect to be here with parser->error set,
1015 which disables these safeguards. But it's possible to get
1016 here for secondary error recovery, after parser->error has
1018 c_parser_consume_pragma (parser
);
1019 c_parser_skip_to_pragma_eol (parser
);
1020 parser
->error
= save_error
;
1027 c_parser_consume_token (parser
);
1031 parser
->error
= false;
1034 /* CPP's options (initialized by c-opts.c). */
1035 extern cpp_options
*cpp_opts
;
1037 /* Save the warning flags which are controlled by __extension__. */
1040 disable_extension_diagnostics (void)
1043 | (warn_pointer_arith
<< 1)
1044 | (warn_traditional
<< 2)
1046 | (warn_long_long
<< 4)
1047 | (warn_cxx_compat
<< 5)
1048 | (warn_overlength_strings
<< 6));
1049 cpp_opts
->cpp_pedantic
= pedantic
= 0;
1050 warn_pointer_arith
= 0;
1051 cpp_opts
->cpp_warn_traditional
= warn_traditional
= 0;
1053 cpp_opts
->cpp_warn_long_long
= warn_long_long
= 0;
1054 warn_cxx_compat
= 0;
1055 warn_overlength_strings
= 0;
1059 /* Restore the warning flags which are controlled by __extension__.
1060 FLAGS is the return value from disable_extension_diagnostics. */
1063 restore_extension_diagnostics (int flags
)
1065 cpp_opts
->cpp_pedantic
= pedantic
= flags
& 1;
1066 warn_pointer_arith
= (flags
>> 1) & 1;
1067 cpp_opts
->cpp_warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
1068 flag_iso
= (flags
>> 3) & 1;
1069 cpp_opts
->cpp_warn_long_long
= warn_long_long
= (flags
>> 4) & 1;
1070 warn_cxx_compat
= (flags
>> 5) & 1;
1071 warn_overlength_strings
= (flags
>> 6) & 1;
1074 /* Possibly kinds of declarator to parse. */
1075 typedef enum c_dtr_syn
{
1076 /* A normal declarator with an identifier. */
1078 /* An abstract declarator (maybe empty). */
1080 /* A parameter declarator: may be either, but after a type name does
1081 not redeclare a typedef name as an identifier if it can
1082 alternatively be interpreted as a typedef name; see DR#009,
1083 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
1084 following DR#249. For example, given a typedef T, "int T" and
1085 "int *T" are valid parameter declarations redeclaring T, while
1086 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
1087 abstract declarators rather than involving redundant parentheses;
1088 the same applies with attributes inside the parentheses before
1093 static void c_parser_external_declaration (c_parser
*);
1094 static void c_parser_asm_definition (c_parser
*);
1095 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool,
1096 bool, bool, tree
*);
1097 static void c_parser_static_assert_declaration_no_semi (c_parser
*);
1098 static void c_parser_static_assert_declaration (c_parser
*);
1099 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
1100 bool, enum c_lookahead_kind
);
1101 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
1102 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
1103 static tree
c_parser_struct_declaration (c_parser
*);
1104 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
1105 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
1107 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
1109 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
1111 struct c_declarator
*);
1112 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
1113 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
,
1115 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
1116 static tree
c_parser_simple_asm_expr (c_parser
*);
1117 static tree
c_parser_attributes (c_parser
*);
1118 static struct c_type_name
*c_parser_type_name (c_parser
*);
1119 static struct c_expr
c_parser_initializer (c_parser
*);
1120 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1121 static void c_parser_initelt (c_parser
*, struct obstack
*);
1122 static void c_parser_initval (c_parser
*, struct c_expr
*,
1124 static tree
c_parser_compound_statement (c_parser
*);
1125 static void c_parser_compound_statement_nostart (c_parser
*);
1126 static void c_parser_label (c_parser
*);
1127 static void c_parser_statement (c_parser
*);
1128 static void c_parser_statement_after_labels (c_parser
*);
1129 static void c_parser_if_statement (c_parser
*);
1130 static void c_parser_switch_statement (c_parser
*);
1131 static void c_parser_while_statement (c_parser
*);
1132 static void c_parser_do_statement (c_parser
*);
1133 static void c_parser_for_statement (c_parser
*);
1134 static tree
c_parser_asm_statement (c_parser
*);
1135 static tree
c_parser_asm_operands (c_parser
*, bool);
1136 static tree
c_parser_asm_goto_operands (c_parser
*);
1137 static tree
c_parser_asm_clobbers (c_parser
*);
1138 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1139 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1141 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1142 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1143 static struct c_expr
c_parser_unary_expression (c_parser
*);
1144 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1145 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1146 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1147 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1148 struct c_type_name
*,
1150 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1153 static struct c_expr
c_parser_expression (c_parser
*);
1154 static struct c_expr
c_parser_expression_conv (c_parser
*);
1155 static VEC(tree
,gc
) *c_parser_expr_list (c_parser
*, bool, bool,
1157 static void c_parser_omp_construct (c_parser
*);
1158 static void c_parser_omp_threadprivate (c_parser
*);
1159 static void c_parser_omp_barrier (c_parser
*);
1160 static void c_parser_omp_flush (c_parser
*);
1161 static void c_parser_omp_taskwait (c_parser
*);
1163 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1164 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1166 /* These Objective-C parser functions are only ever called when
1167 compiling Objective-C. */
1168 static void c_parser_objc_class_definition (c_parser
*, tree
);
1169 static void c_parser_objc_class_instance_variables (c_parser
*);
1170 static void c_parser_objc_class_declaration (c_parser
*);
1171 static void c_parser_objc_alias_declaration (c_parser
*);
1172 static void c_parser_objc_protocol_definition (c_parser
*, tree
);
1173 static bool c_parser_objc_method_type (c_parser
*);
1174 static void c_parser_objc_method_definition (c_parser
*);
1175 static void c_parser_objc_methodprotolist (c_parser
*);
1176 static void c_parser_objc_methodproto (c_parser
*);
1177 static tree
c_parser_objc_method_decl (c_parser
*, bool, tree
*, tree
*);
1178 static tree
c_parser_objc_type_name (c_parser
*);
1179 static tree
c_parser_objc_protocol_refs (c_parser
*);
1180 static void c_parser_objc_try_catch_finally_statement (c_parser
*);
1181 static void c_parser_objc_synchronized_statement (c_parser
*);
1182 static tree
c_parser_objc_selector (c_parser
*);
1183 static tree
c_parser_objc_selector_arg (c_parser
*);
1184 static tree
c_parser_objc_receiver (c_parser
*);
1185 static tree
c_parser_objc_message_args (c_parser
*);
1186 static tree
c_parser_objc_keywordexpr (c_parser
*);
1187 static void c_parser_objc_at_property_declaration (c_parser
*);
1188 static void c_parser_objc_at_synthesize_declaration (c_parser
*);
1189 static void c_parser_objc_at_dynamic_declaration (c_parser
*);
1190 static bool c_parser_objc_diagnose_bad_element_prefix
1191 (c_parser
*, struct c_declspecs
*);
1193 /* Parse a translation unit (C90 6.7, C99 6.9).
1196 external-declarations
1198 external-declarations:
1199 external-declaration
1200 external-declarations external-declaration
1209 c_parser_translation_unit (c_parser
*parser
)
1211 if (c_parser_next_token_is (parser
, CPP_EOF
))
1213 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1214 "ISO C forbids an empty translation unit");
1218 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1219 mark_valid_location_for_stdc_pragma (false);
1223 c_parser_external_declaration (parser
);
1224 obstack_free (&parser_obstack
, obstack_position
);
1226 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1230 /* Parse an external declaration (C90 6.7, C99 6.9).
1232 external-declaration:
1238 external-declaration:
1241 __extension__ external-declaration
1245 external-declaration:
1246 objc-class-definition
1247 objc-class-declaration
1248 objc-alias-declaration
1249 objc-protocol-definition
1250 objc-method-definition
1255 c_parser_external_declaration (c_parser
*parser
)
1258 switch (c_parser_peek_token (parser
)->type
)
1261 switch (c_parser_peek_token (parser
)->keyword
)
1264 ext
= disable_extension_diagnostics ();
1265 c_parser_consume_token (parser
);
1266 c_parser_external_declaration (parser
);
1267 restore_extension_diagnostics (ext
);
1270 c_parser_asm_definition (parser
);
1272 case RID_AT_INTERFACE
:
1273 case RID_AT_IMPLEMENTATION
:
1274 gcc_assert (c_dialect_objc ());
1275 c_parser_objc_class_definition (parser
, NULL_TREE
);
1278 gcc_assert (c_dialect_objc ());
1279 c_parser_objc_class_declaration (parser
);
1282 gcc_assert (c_dialect_objc ());
1283 c_parser_objc_alias_declaration (parser
);
1285 case RID_AT_PROTOCOL
:
1286 gcc_assert (c_dialect_objc ());
1287 c_parser_objc_protocol_definition (parser
, NULL_TREE
);
1289 case RID_AT_PROPERTY
:
1290 gcc_assert (c_dialect_objc ());
1291 c_parser_objc_at_property_declaration (parser
);
1293 case RID_AT_SYNTHESIZE
:
1294 gcc_assert (c_dialect_objc ());
1295 c_parser_objc_at_synthesize_declaration (parser
);
1297 case RID_AT_DYNAMIC
:
1298 gcc_assert (c_dialect_objc ());
1299 c_parser_objc_at_dynamic_declaration (parser
);
1302 gcc_assert (c_dialect_objc ());
1303 c_parser_consume_token (parser
);
1304 objc_finish_implementation ();
1311 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1312 "ISO C does not allow extra %<;%> outside of a function");
1313 c_parser_consume_token (parser
);
1316 mark_valid_location_for_stdc_pragma (true);
1317 c_parser_pragma (parser
, pragma_external
);
1318 mark_valid_location_for_stdc_pragma (false);
1322 if (c_dialect_objc ())
1324 c_parser_objc_method_definition (parser
);
1327 /* Else fall through, and yield a syntax error trying to parse
1328 as a declaration or function definition. */
1331 /* A declaration or a function definition (or, in Objective-C,
1332 an @interface or @protocol with prefix attributes). We can
1333 only tell which after parsing the declaration specifiers, if
1334 any, and the first declarator. */
1335 c_parser_declaration_or_fndef (parser
, true, true, true, false, true, NULL
);
1340 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1341 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1342 accepted; otherwise (old-style parameter declarations) only other
1343 declarations are accepted. If STATIC_ASSERT_OK is true, a static
1344 assertion is accepted; otherwise (old-style parameter declarations)
1345 it is not. If NESTED is true, we are inside a function or parsing
1346 old-style parameter declarations; any functions encountered are
1347 nested functions and declaration specifiers are required; otherwise
1348 we are at top level and functions are normal functions and
1349 declaration specifiers may be optional. If EMPTY_OK is true, empty
1350 declarations are OK (subject to all other constraints); otherwise
1351 (old-style parameter declarations) they are diagnosed. If
1352 START_ATTR_OK is true, the declaration specifiers may start with
1353 attributes; otherwise they may not.
1354 OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed
1355 declaration when parsing an Objective-C foreach statement.
1358 declaration-specifiers init-declarator-list[opt] ;
1359 static_assert-declaration
1361 function-definition:
1362 declaration-specifiers[opt] declarator declaration-list[opt]
1367 declaration-list declaration
1369 init-declarator-list:
1371 init-declarator-list , init-declarator
1374 declarator simple-asm-expr[opt] attributes[opt]
1375 declarator simple-asm-expr[opt] attributes[opt] = initializer
1379 nested-function-definition:
1380 declaration-specifiers declarator declaration-list[opt]
1384 attributes objc-class-definition
1385 attributes objc-category-definition
1386 attributes objc-protocol-definition
1388 The simple-asm-expr and attributes are GNU extensions.
1390 This function does not handle __extension__; that is handled in its
1391 callers. ??? Following the old parser, __extension__ may start
1392 external declarations, declarations in functions and declarations
1393 at the start of "for" loops, but not old-style parameter
1396 C99 requires declaration specifiers in a function definition; the
1397 absence is diagnosed through the diagnosis of implicit int. In GNU
1398 C we also allow but diagnose declarations without declaration
1399 specifiers, but only at top level (elsewhere they conflict with
1402 In Objective-C, declarations of the looping variable in a foreach
1403 statement are exceptionally terminated by 'in' (for example, 'for
1404 (NSObject *object in array) { ... }').
1409 threadprivate-directive */
1412 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
,
1413 bool static_assert_ok
, bool empty_ok
,
1414 bool nested
, bool start_attr_ok
,
1415 tree
*objc_foreach_object_declaration
)
1417 struct c_declspecs
*specs
;
1419 tree all_prefix_attrs
;
1420 bool diagnosed_no_specs
= false;
1421 location_t here
= c_parser_peek_token (parser
)->location
;
1423 if (static_assert_ok
1424 && c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
1426 c_parser_static_assert_declaration (parser
);
1429 specs
= build_null_declspecs ();
1431 /* Try to detect an unknown type name when we have "A B" or "A *B". */
1432 if (c_parser_peek_token (parser
)->type
== CPP_NAME
1433 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
1434 && (c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
1435 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
1436 && (!nested
|| !lookup_name (c_parser_peek_token (parser
)->value
)))
1438 error_at (here
, "unknown type name %qE",
1439 c_parser_peek_token (parser
)->value
);
1441 /* Parse declspecs normally to get a correct pointer type, but avoid
1442 a further "fails to be a type name" error. Refuse nested functions
1443 since it is not how the user likely wants us to recover. */
1444 c_parser_peek_token (parser
)->type
= CPP_KEYWORD
;
1445 c_parser_peek_token (parser
)->keyword
= RID_VOID
;
1446 c_parser_peek_token (parser
)->value
= error_mark_node
;
1450 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
, cla_nonabstract_decl
);
1453 c_parser_skip_to_end_of_block_or_statement (parser
);
1456 if (nested
&& !specs
->declspecs_seen_p
)
1458 c_parser_error (parser
, "expected declaration specifiers");
1459 c_parser_skip_to_end_of_block_or_statement (parser
);
1462 finish_declspecs (specs
);
1463 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1469 shadow_tag_warned (specs
, 1);
1470 pedwarn (here
, 0, "empty declaration");
1472 c_parser_consume_token (parser
);
1476 /* Provide better error recovery. Note that a type name here is usually
1477 better diagnosed as a redeclaration. */
1479 && specs
->typespec_kind
== ctsk_tagdef
1480 && c_parser_next_token_starts_declspecs (parser
)
1481 && !c_parser_next_token_is (parser
, CPP_NAME
))
1483 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
1484 parser
->error
= false;
1485 shadow_tag_warned (specs
, 1);
1488 else if (c_dialect_objc ())
1490 /* Prefix attributes are an error on method decls. */
1491 switch (c_parser_peek_token (parser
)->type
)
1495 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1499 warning_at (c_parser_peek_token (parser
)->location
,
1501 "prefix attributes are ignored for methods");
1502 specs
->attrs
= NULL_TREE
;
1505 c_parser_objc_method_definition (parser
);
1507 c_parser_objc_methodproto (parser
);
1513 /* This is where we parse 'attributes @interface ...',
1514 'attributes @implementation ...', 'attributes @protocol ...'
1515 (where attributes could be, for example, __attribute__
1518 switch (c_parser_peek_token (parser
)->keyword
)
1520 case RID_AT_INTERFACE
:
1522 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1524 c_parser_objc_class_definition (parser
, specs
->attrs
);
1528 case RID_AT_IMPLEMENTATION
:
1530 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1534 warning_at (c_parser_peek_token (parser
)->location
,
1536 "prefix attributes are ignored for implementations");
1537 specs
->attrs
= NULL_TREE
;
1539 c_parser_objc_class_definition (parser
, NULL_TREE
);
1543 case RID_AT_PROTOCOL
:
1545 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1547 c_parser_objc_protocol_definition (parser
, specs
->attrs
);
1554 case RID_AT_PROPERTY
:
1557 c_parser_error (parser
, "unexpected attribute");
1558 specs
->attrs
= NULL
;
1566 pending_xref_error ();
1567 prefix_attrs
= specs
->attrs
;
1568 all_prefix_attrs
= prefix_attrs
;
1569 specs
->attrs
= NULL_TREE
;
1572 struct c_declarator
*declarator
;
1576 /* Declaring either one or more declarators (in which case we
1577 should diagnose if there were no declaration specifiers) or a
1578 function definition (in which case the diagnostic for
1579 implicit int suffices). */
1580 declarator
= c_parser_declarator (parser
,
1581 specs
->typespec_kind
!= ctsk_none
,
1582 C_DTR_NORMAL
, &dummy
);
1583 if (declarator
== NULL
)
1585 c_parser_skip_to_end_of_block_or_statement (parser
);
1588 if (c_parser_next_token_is (parser
, CPP_EQ
)
1589 || c_parser_next_token_is (parser
, CPP_COMMA
)
1590 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1591 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1592 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
)
1593 || c_parser_next_token_is_keyword (parser
, RID_IN
))
1595 tree asm_name
= NULL_TREE
;
1596 tree postfix_attrs
= NULL_TREE
;
1597 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1599 diagnosed_no_specs
= true;
1600 pedwarn (here
, 0, "data definition has no type or storage class");
1602 /* Having seen a data definition, there cannot now be a
1603 function definition. */
1605 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1606 asm_name
= c_parser_simple_asm_expr (parser
);
1607 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1608 postfix_attrs
= c_parser_attributes (parser
);
1609 if (c_parser_next_token_is (parser
, CPP_EQ
))
1613 location_t init_loc
;
1614 c_parser_consume_token (parser
);
1615 /* The declaration of the variable is in effect while
1616 its initializer is parsed. */
1617 d
= start_decl (declarator
, specs
, true,
1618 chainon (postfix_attrs
, all_prefix_attrs
));
1620 d
= error_mark_node
;
1621 start_init (d
, asm_name
, global_bindings_p ());
1622 init_loc
= c_parser_peek_token (parser
)->location
;
1623 init
= c_parser_initializer (parser
);
1625 if (d
!= error_mark_node
)
1627 maybe_warn_string_init (TREE_TYPE (d
), init
);
1628 finish_decl (d
, init_loc
, init
.value
,
1629 init
.original_type
, asm_name
);
1634 tree d
= start_decl (declarator
, specs
, false,
1635 chainon (postfix_attrs
,
1638 finish_decl (d
, UNKNOWN_LOCATION
, NULL_TREE
,
1639 NULL_TREE
, asm_name
);
1641 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1644 *objc_foreach_object_declaration
= d
;
1646 *objc_foreach_object_declaration
= error_mark_node
;
1649 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1651 c_parser_consume_token (parser
);
1652 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1653 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1656 all_prefix_attrs
= prefix_attrs
;
1659 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1661 c_parser_consume_token (parser
);
1664 else if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1666 /* This can only happen in Objective-C: we found the
1667 'in' that terminates the declaration inside an
1668 Objective-C foreach statement. Do not consume the
1669 token, so that the caller can use it to determine
1670 that this indeed is a foreach context. */
1675 c_parser_error (parser
, "expected %<,%> or %<;%>");
1676 c_parser_skip_to_end_of_block_or_statement (parser
);
1682 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1683 "%<asm%> or %<__attribute__%>");
1684 c_parser_skip_to_end_of_block_or_statement (parser
);
1687 /* Function definition (nested or otherwise). */
1690 pedwarn (here
, OPT_pedantic
, "ISO C forbids nested functions");
1691 c_push_function_context ();
1693 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1695 /* This can appear in many cases looking nothing like a
1696 function definition, so we don't give a more specific
1697 error suggesting there was one. */
1698 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1699 "or %<__attribute__%>");
1701 c_pop_function_context ();
1705 if (DECL_DECLARED_INLINE_P (current_function_decl
))
1706 tv
= TV_PARSE_INLINE
;
1711 /* Parse old-style parameter declarations. ??? Attributes are
1712 not allowed to start declaration specifiers here because of a
1713 syntax conflict between a function declaration with attribute
1714 suffix and a function definition with an attribute prefix on
1715 first old-style parameter declaration. Following the old
1716 parser, they are not accepted on subsequent old-style
1717 parameter declarations either. However, there is no
1718 ambiguity after the first declaration, nor indeed on the
1719 first as long as we don't allow postfix attributes after a
1720 declarator with a nonempty identifier list in a definition;
1721 and postfix attributes have never been accepted here in
1722 function definitions either. */
1723 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1724 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1725 c_parser_declaration_or_fndef (parser
, false, false, false,
1727 store_parm_decls ();
1728 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1729 = c_parser_peek_token (parser
)->location
;
1730 fnbody
= c_parser_compound_statement (parser
);
1733 tree decl
= current_function_decl
;
1734 /* Mark nested functions as needing static-chain initially.
1735 lower_nested_functions will recompute it but the
1736 DECL_STATIC_CHAIN flag is also used before that happens,
1737 by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */
1738 DECL_STATIC_CHAIN (decl
) = 1;
1741 c_pop_function_context ();
1742 add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl
), DECL_EXPR
, decl
));
1755 /* Parse an asm-definition (asm() outside a function body). This is a
1763 c_parser_asm_definition (c_parser
*parser
)
1765 tree asm_str
= c_parser_simple_asm_expr (parser
);
1767 cgraph_add_asm_node (asm_str
);
1768 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1771 /* Parse a static assertion (C1X N1425 6.7.10).
1773 static_assert-declaration:
1774 static_assert-declaration-no-semi ;
1778 c_parser_static_assert_declaration (c_parser
*parser
)
1780 c_parser_static_assert_declaration_no_semi (parser
);
1782 || !c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
1783 c_parser_skip_to_end_of_block_or_statement (parser
);
1786 /* Parse a static assertion (C1X N1425 6.7.10), without the trailing
1789 static_assert-declaration-no-semi:
1790 _Static_assert ( constant-expression , string-literal )
1794 c_parser_static_assert_declaration_no_semi (c_parser
*parser
)
1796 location_t assert_loc
, value_loc
;
1800 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
));
1801 assert_loc
= c_parser_peek_token (parser
)->location
;
1805 pedwarn (assert_loc
, OPT_pedantic
,
1806 "ISO C99 does not support %<_Static_assert%>");
1808 pedwarn (assert_loc
, OPT_pedantic
,
1809 "ISO C90 does not support %<_Static_assert%>");
1811 c_parser_consume_token (parser
);
1812 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1814 value_loc
= c_parser_peek_token (parser
)->location
;
1815 value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1816 parser
->lex_untranslated_string
= true;
1817 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
1819 parser
->lex_untranslated_string
= false;
1822 switch (c_parser_peek_token (parser
)->type
)
1828 case CPP_UTF8STRING
:
1829 string
= c_parser_peek_token (parser
)->value
;
1830 c_parser_consume_token (parser
);
1831 parser
->lex_untranslated_string
= false;
1834 c_parser_error (parser
, "expected string literal");
1835 parser
->lex_untranslated_string
= false;
1838 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
1840 if (!INTEGRAL_TYPE_P (TREE_TYPE (value
)))
1842 error_at (value_loc
, "expression in static assertion is not an integer");
1845 if (TREE_CODE (value
) != INTEGER_CST
)
1847 value
= c_fully_fold (value
, false, NULL
);
1848 if (TREE_CODE (value
) == INTEGER_CST
)
1849 pedwarn (value_loc
, OPT_pedantic
, "expression in static assertion "
1850 "is not an integer constant expression");
1852 if (TREE_CODE (value
) != INTEGER_CST
)
1854 error_at (value_loc
, "expression in static assertion is not constant");
1857 constant_expression_warning (value
);
1858 if (integer_zerop (value
))
1859 error_at (assert_loc
, "static assertion failed: %E", string
);
1862 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1863 6.7), adding them to SPECS (which may already include some).
1864 Storage class specifiers are accepted iff SCSPEC_OK; type
1865 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1866 the start iff START_ATTR_OK.
1868 declaration-specifiers:
1869 storage-class-specifier declaration-specifiers[opt]
1870 type-specifier declaration-specifiers[opt]
1871 type-qualifier declaration-specifiers[opt]
1872 function-specifier declaration-specifiers[opt]
1874 Function specifiers (inline) are from C99, and are currently
1875 handled as storage class specifiers, as is __thread.
1877 C90 6.5.1, C99 6.7.1:
1878 storage-class-specifier:
1889 C90 6.5.2, C99 6.7.2:
1902 [_Imaginary removed in C99 TC2]
1903 struct-or-union-specifier
1907 (_Bool and _Complex are new in C99.)
1909 C90 6.5.3, C99 6.7.3:
1915 address-space-qualifier
1917 (restrict is new in C99.)
1921 declaration-specifiers:
1922 attributes declaration-specifiers[opt]
1928 identifier recognized by the target
1930 storage-class-specifier:
1943 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1944 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1949 class-name objc-protocol-refs[opt]
1950 typedef-name objc-protocol-refs
1955 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1956 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
,
1957 enum c_lookahead_kind la
)
1959 bool attrs_ok
= start_attr_ok
;
1960 bool seen_type
= specs
->typespec_kind
!= ctsk_none
;
1963 gcc_assert (la
== cla_prefer_id
);
1965 while (c_parser_next_token_is (parser
, CPP_NAME
)
1966 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1967 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1969 struct c_typespec t
;
1971 location_t loc
= c_parser_peek_token (parser
)->location
;
1973 /* If we cannot accept a type, exit if the next token must start
1974 one. Also, if we already have seen a tagged definition,
1975 a typename would be an error anyway and likely the user
1976 has simply forgotten a semicolon, so we exit. */
1977 if ((!typespec_ok
|| specs
->typespec_kind
== ctsk_tagdef
)
1978 && c_parser_next_tokens_start_typename (parser
, la
)
1979 && !c_parser_next_token_is_qualifier (parser
))
1982 if (c_parser_next_token_is (parser
, CPP_NAME
))
1984 tree value
= c_parser_peek_token (parser
)->value
;
1985 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1987 if (kind
== C_ID_ADDRSPACE
)
1990 = c_parser_peek_token (parser
)->keyword
- RID_FIRST_ADDR_SPACE
;
1991 declspecs_add_addrspace (specs
, as
);
1992 c_parser_consume_token (parser
);
1997 gcc_assert (!c_parser_next_token_is_qualifier (parser
));
1999 /* If we cannot accept a type, and the next token must start one,
2000 exit. Do the same if we already have seen a tagged definition,
2001 since it would be an error anyway and likely the user has simply
2002 forgotten a semicolon. */
2003 if (seen_type
|| !c_parser_next_tokens_start_typename (parser
, la
))
2006 /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
2007 a C_ID_CLASSNAME. */
2008 c_parser_consume_token (parser
);
2011 if (kind
== C_ID_ID
)
2013 error ("unknown type name %qE", value
);
2014 t
.kind
= ctsk_typedef
;
2015 t
.spec
= error_mark_node
;
2017 else if (kind
== C_ID_TYPENAME
2018 && (!c_dialect_objc ()
2019 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
2021 t
.kind
= ctsk_typedef
;
2022 /* For a typedef name, record the meaning, not the name.
2023 In case of 'foo foo, bar;'. */
2024 t
.spec
= lookup_name (value
);
2028 tree proto
= NULL_TREE
;
2029 gcc_assert (c_dialect_objc ());
2031 if (c_parser_next_token_is (parser
, CPP_LESS
))
2032 proto
= c_parser_objc_protocol_refs (parser
);
2033 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
2036 t
.expr_const_operands
= true;
2037 declspecs_add_type (loc
, specs
, t
);
2040 if (c_parser_next_token_is (parser
, CPP_LESS
))
2042 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
2043 nisse@lysator.liu.se. */
2045 gcc_assert (c_dialect_objc ());
2046 if (!typespec_ok
|| seen_type
)
2048 proto
= c_parser_objc_protocol_refs (parser
);
2050 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
2052 t
.expr_const_operands
= true;
2053 declspecs_add_type (loc
, specs
, t
);
2056 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
2057 switch (c_parser_peek_token (parser
)->keyword
)
2069 /* TODO: Distinguish between function specifiers (inline)
2070 and storage class specifiers, either here or in
2071 declspecs_add_scspec. */
2072 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
2073 c_parser_consume_token (parser
);
2097 if (c_dialect_objc ())
2098 parser
->objc_need_raw_identifier
= true;
2099 t
.kind
= ctsk_resword
;
2100 t
.spec
= c_parser_peek_token (parser
)->value
;
2102 t
.expr_const_operands
= true;
2103 declspecs_add_type (loc
, specs
, t
);
2104 c_parser_consume_token (parser
);
2111 t
= c_parser_enum_specifier (parser
);
2112 declspecs_add_type (loc
, specs
, t
);
2120 t
= c_parser_struct_or_union_specifier (parser
);
2121 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, t
.spec
);
2122 declspecs_add_type (loc
, specs
, t
);
2125 /* ??? The old parser rejected typeof after other type
2126 specifiers, but is a syntax error the best way of
2128 if (!typespec_ok
|| seen_type
)
2132 t
= c_parser_typeof_specifier (parser
);
2133 declspecs_add_type (loc
, specs
, t
);
2139 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
2140 c_parser_consume_token (parser
);
2145 attrs
= c_parser_attributes (parser
);
2146 declspecs_add_attrs (specs
, attrs
);
2155 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
2158 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
2159 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
2160 enum attributes[opt] identifier
2162 The form with trailing comma is new in C99. The forms with
2163 attributes are GNU extensions. In GNU C, we accept any expression
2164 without commas in the syntax (assignment expressions, not just
2165 conditional expressions); assignment expressions will be diagnosed
2170 enumerator-list , enumerator
2173 enumeration-constant
2174 enumeration-constant = constant-expression
2177 static struct c_typespec
2178 c_parser_enum_specifier (c_parser
*parser
)
2180 struct c_typespec ret
;
2182 tree ident
= NULL_TREE
;
2183 location_t enum_loc
;
2184 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2185 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
2186 enum_loc
= c_parser_peek_token (parser
)->location
;
2187 c_parser_consume_token (parser
);
2188 attrs
= c_parser_attributes (parser
);
2189 enum_loc
= c_parser_peek_token (parser
)->location
;
2190 /* Set the location in case we create a decl now. */
2191 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2192 if (c_parser_next_token_is (parser
, CPP_NAME
))
2194 ident
= c_parser_peek_token (parser
)->value
;
2195 ident_loc
= c_parser_peek_token (parser
)->location
;
2196 enum_loc
= ident_loc
;
2197 c_parser_consume_token (parser
);
2199 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2201 /* Parse an enum definition. */
2202 struct c_enum_contents the_enum
;
2205 /* We chain the enumerators in reverse order, then put them in
2206 forward order at the end. */
2208 timevar_push (TV_PARSE_ENUM
);
2209 type
= start_enum (enum_loc
, &the_enum
, ident
);
2211 c_parser_consume_token (parser
);
2219 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2220 location_t decl_loc
, value_loc
;
2221 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
2223 c_parser_error (parser
, "expected identifier");
2224 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2225 values
= error_mark_node
;
2228 token
= c_parser_peek_token (parser
);
2229 enum_id
= token
->value
;
2230 /* Set the location in case we create a decl now. */
2231 c_parser_set_source_position_from_token (token
);
2232 decl_loc
= value_loc
= token
->location
;
2233 c_parser_consume_token (parser
);
2234 if (c_parser_next_token_is (parser
, CPP_EQ
))
2236 c_parser_consume_token (parser
);
2237 value_loc
= c_parser_peek_token (parser
)->location
;
2238 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
2241 enum_value
= NULL_TREE
;
2242 enum_decl
= build_enumerator (decl_loc
, value_loc
,
2243 &the_enum
, enum_id
, enum_value
);
2244 TREE_CHAIN (enum_decl
) = values
;
2247 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2249 comma_loc
= c_parser_peek_token (parser
)->location
;
2251 c_parser_consume_token (parser
);
2253 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2255 if (seen_comma
&& !flag_isoc99
)
2256 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
2257 c_parser_consume_token (parser
);
2262 c_parser_error (parser
, "expected %<,%> or %<}%>");
2263 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2264 values
= error_mark_node
;
2268 postfix_attrs
= c_parser_attributes (parser
);
2269 ret
.spec
= finish_enum (type
, nreverse (values
),
2270 chainon (attrs
, postfix_attrs
));
2271 ret
.kind
= ctsk_tagdef
;
2272 ret
.expr
= NULL_TREE
;
2273 ret
.expr_const_operands
= true;
2274 timevar_pop (TV_PARSE_ENUM
);
2279 c_parser_error (parser
, "expected %<{%>");
2280 ret
.spec
= error_mark_node
;
2281 ret
.kind
= ctsk_tagref
;
2282 ret
.expr
= NULL_TREE
;
2283 ret
.expr_const_operands
= true;
2286 ret
= parser_xref_tag (ident_loc
, ENUMERAL_TYPE
, ident
);
2287 /* In ISO C, enumerated types can be referred to only if already
2289 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
2292 pedwarn (enum_loc
, OPT_pedantic
,
2293 "ISO C forbids forward references to %<enum%> types");
2298 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
2300 struct-or-union-specifier:
2301 struct-or-union attributes[opt] identifier[opt]
2302 { struct-contents } attributes[opt]
2303 struct-or-union attributes[opt] identifier
2306 struct-declaration-list
2308 struct-declaration-list:
2309 struct-declaration ;
2310 struct-declaration-list struct-declaration ;
2317 struct-declaration-list struct-declaration
2319 struct-declaration-list:
2320 struct-declaration-list ;
2323 (Note that in the syntax here, unlike that in ISO C, the semicolons
2324 are included here rather than in struct-declaration, in order to
2325 describe the syntax with extra semicolons and missing semicolon at
2330 struct-declaration-list:
2331 @defs ( class-name )
2333 (Note this does not include a trailing semicolon, but can be
2334 followed by further declarations, and gets a pedwarn-if-pedantic
2335 when followed by a semicolon.) */
2337 static struct c_typespec
2338 c_parser_struct_or_union_specifier (c_parser
*parser
)
2340 struct c_typespec ret
;
2342 tree ident
= NULL_TREE
;
2343 location_t struct_loc
;
2344 location_t ident_loc
= UNKNOWN_LOCATION
;
2345 enum tree_code code
;
2346 switch (c_parser_peek_token (parser
)->keyword
)
2357 struct_loc
= c_parser_peek_token (parser
)->location
;
2358 c_parser_consume_token (parser
);
2359 attrs
= c_parser_attributes (parser
);
2361 /* Set the location in case we create a decl now. */
2362 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2364 if (c_parser_next_token_is (parser
, CPP_NAME
))
2366 ident
= c_parser_peek_token (parser
)->value
;
2367 ident_loc
= c_parser_peek_token (parser
)->location
;
2368 struct_loc
= ident_loc
;
2369 c_parser_consume_token (parser
);
2371 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2373 /* Parse a struct or union definition. Start the scope of the
2374 tag before parsing components. */
2375 struct c_struct_parse_info
*struct_info
;
2376 tree type
= start_struct (struct_loc
, code
, ident
, &struct_info
);
2378 /* We chain the components in reverse order, then put them in
2379 forward order at the end. Each struct-declaration may
2380 declare multiple components (comma-separated), so we must use
2381 chainon to join them, although when parsing each
2382 struct-declaration we can use TREE_CHAIN directly.
2384 The theory behind all this is that there will be more
2385 semicolon separated fields than comma separated fields, and
2386 so we'll be minimizing the number of node traversals required
2389 timevar_push (TV_PARSE_STRUCT
);
2390 contents
= NULL_TREE
;
2391 c_parser_consume_token (parser
);
2392 /* Handle the Objective-C @defs construct,
2393 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
2394 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
2397 gcc_assert (c_dialect_objc ());
2398 c_parser_consume_token (parser
);
2399 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2401 if (c_parser_next_token_is (parser
, CPP_NAME
)
2402 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
2404 name
= c_parser_peek_token (parser
)->value
;
2405 c_parser_consume_token (parser
);
2409 c_parser_error (parser
, "expected class name");
2410 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2413 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2415 contents
= nreverse (objc_get_class_ivars (name
));
2418 /* Parse the struct-declarations and semicolons. Problems with
2419 semicolons are diagnosed here; empty structures are diagnosed
2424 /* Parse any stray semicolon. */
2425 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2427 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
2428 "extra semicolon in struct or union specified");
2429 c_parser_consume_token (parser
);
2432 /* Stop if at the end of the struct or union contents. */
2433 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2435 c_parser_consume_token (parser
);
2438 /* Accept #pragmas at struct scope. */
2439 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
2441 c_parser_pragma (parser
, pragma_external
);
2444 /* Parse some comma-separated declarations, but not the
2445 trailing semicolon if any. */
2446 decls
= c_parser_struct_declaration (parser
);
2447 contents
= chainon (decls
, contents
);
2448 /* If no semicolon follows, either we have a parse error or
2449 are at the end of the struct or union and should
2451 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2452 c_parser_consume_token (parser
);
2455 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2456 pedwarn (c_parser_peek_token (parser
)->location
, 0,
2457 "no semicolon at end of struct or union");
2458 else if (parser
->error
2459 || !c_parser_next_token_starts_declspecs (parser
))
2461 c_parser_error (parser
, "expected %<;%>");
2462 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2466 /* If we come here, we have already emitted an error
2467 for an expected `;', identifier or `(', and we also
2468 recovered already. Go on with the next field. */
2471 postfix_attrs
= c_parser_attributes (parser
);
2472 ret
.spec
= finish_struct (struct_loc
, type
, nreverse (contents
),
2473 chainon (attrs
, postfix_attrs
), struct_info
);
2474 ret
.kind
= ctsk_tagdef
;
2475 ret
.expr
= NULL_TREE
;
2476 ret
.expr_const_operands
= true;
2477 timevar_pop (TV_PARSE_STRUCT
);
2482 c_parser_error (parser
, "expected %<{%>");
2483 ret
.spec
= error_mark_node
;
2484 ret
.kind
= ctsk_tagref
;
2485 ret
.expr
= NULL_TREE
;
2486 ret
.expr_const_operands
= true;
2489 ret
= parser_xref_tag (ident_loc
, code
, ident
);
2493 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
2494 the trailing semicolon.
2497 specifier-qualifier-list struct-declarator-list
2498 static_assert-declaration-no-semi
2500 specifier-qualifier-list:
2501 type-specifier specifier-qualifier-list[opt]
2502 type-qualifier specifier-qualifier-list[opt]
2503 attributes specifier-qualifier-list[opt]
2505 struct-declarator-list:
2507 struct-declarator-list , attributes[opt] struct-declarator
2510 declarator attributes[opt]
2511 declarator[opt] : constant-expression attributes[opt]
2516 __extension__ struct-declaration
2517 specifier-qualifier-list
2519 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
2520 of attributes where shown is a GNU extension. In GNU C, we accept
2521 any expression without commas in the syntax (assignment
2522 expressions, not just conditional expressions); assignment
2523 expressions will be diagnosed as non-constant. */
2526 c_parser_struct_declaration (c_parser
*parser
)
2528 struct c_declspecs
*specs
;
2530 tree all_prefix_attrs
;
2532 location_t decl_loc
;
2533 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2537 ext
= disable_extension_diagnostics ();
2538 c_parser_consume_token (parser
);
2539 decl
= c_parser_struct_declaration (parser
);
2540 restore_extension_diagnostics (ext
);
2543 if (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
2545 c_parser_static_assert_declaration_no_semi (parser
);
2548 specs
= build_null_declspecs ();
2549 decl_loc
= c_parser_peek_token (parser
)->location
;
2550 c_parser_declspecs (parser
, specs
, false, true, true, cla_nonabstract_decl
);
2553 if (!specs
->declspecs_seen_p
)
2555 c_parser_error (parser
, "expected specifier-qualifier-list");
2558 finish_declspecs (specs
);
2559 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2560 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2563 if (specs
->typespec_kind
== ctsk_none
)
2565 pedwarn (decl_loc
, OPT_pedantic
,
2566 "ISO C forbids member declarations with no members");
2567 shadow_tag_warned (specs
, pedantic
);
2572 /* Support for unnamed structs or unions as members of
2573 structs or unions (which is [a] useful and [b] supports
2577 ret
= grokfield (c_parser_peek_token (parser
)->location
,
2578 build_id_declarator (NULL_TREE
), specs
,
2581 decl_attributes (&ret
, attrs
, 0);
2586 /* Provide better error recovery. Note that a type name here is valid,
2587 and will be treated as a field name. */
2588 if (specs
->typespec_kind
== ctsk_tagdef
2589 && TREE_CODE (specs
->type
) != ENUMERAL_TYPE
2590 && c_parser_next_token_starts_declspecs (parser
)
2591 && !c_parser_next_token_is (parser
, CPP_NAME
))
2593 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
2594 parser
->error
= false;
2598 pending_xref_error ();
2599 prefix_attrs
= specs
->attrs
;
2600 all_prefix_attrs
= prefix_attrs
;
2601 specs
->attrs
= NULL_TREE
;
2605 /* Declaring one or more declarators or un-named bit-fields. */
2606 struct c_declarator
*declarator
;
2608 if (c_parser_next_token_is (parser
, CPP_COLON
))
2609 declarator
= build_id_declarator (NULL_TREE
);
2611 declarator
= c_parser_declarator (parser
,
2612 specs
->typespec_kind
!= ctsk_none
,
2613 C_DTR_NORMAL
, &dummy
);
2614 if (declarator
== NULL
)
2616 c_parser_skip_to_end_of_block_or_statement (parser
);
2619 if (c_parser_next_token_is (parser
, CPP_COLON
)
2620 || c_parser_next_token_is (parser
, CPP_COMMA
)
2621 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2622 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2623 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2625 tree postfix_attrs
= NULL_TREE
;
2626 tree width
= NULL_TREE
;
2628 if (c_parser_next_token_is (parser
, CPP_COLON
))
2630 c_parser_consume_token (parser
);
2631 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2633 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2634 postfix_attrs
= c_parser_attributes (parser
);
2635 d
= grokfield (c_parser_peek_token (parser
)->location
,
2636 declarator
, specs
, width
, &all_prefix_attrs
);
2637 decl_attributes (&d
, chainon (postfix_attrs
,
2638 all_prefix_attrs
), 0);
2639 DECL_CHAIN (d
) = decls
;
2641 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2642 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2645 all_prefix_attrs
= prefix_attrs
;
2646 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2647 c_parser_consume_token (parser
);
2648 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2649 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2651 /* Semicolon consumed in caller. */
2656 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2662 c_parser_error (parser
,
2663 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2664 "%<__attribute__%>");
2671 /* Parse a typeof specifier (a GNU extension).
2674 typeof ( expression )
2675 typeof ( type-name )
2678 static struct c_typespec
2679 c_parser_typeof_specifier (c_parser
*parser
)
2681 struct c_typespec ret
;
2682 ret
.kind
= ctsk_typeof
;
2683 ret
.spec
= error_mark_node
;
2684 ret
.expr
= NULL_TREE
;
2685 ret
.expr_const_operands
= true;
2686 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2687 c_parser_consume_token (parser
);
2688 c_inhibit_evaluation_warnings
++;
2690 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2692 c_inhibit_evaluation_warnings
--;
2696 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_id
))
2698 struct c_type_name
*type
= c_parser_type_name (parser
);
2699 c_inhibit_evaluation_warnings
--;
2703 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2704 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2710 location_t here
= c_parser_peek_token (parser
)->location
;
2711 struct c_expr expr
= c_parser_expression (parser
);
2712 c_inhibit_evaluation_warnings
--;
2714 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2715 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2716 error_at (here
, "%<typeof%> applied to a bit-field");
2717 mark_exp_read (expr
.value
);
2718 ret
.spec
= TREE_TYPE (expr
.value
);
2719 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2720 /* This is returned with the type so that when the type is
2721 evaluated, this can be evaluated. */
2723 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2724 pop_maybe_used (was_vm
);
2726 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2730 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2731 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2732 be redeclared; otherwise it may not. KIND indicates which kind of
2733 declarator is wanted. Returns a valid declarator except in the
2734 case of a syntax error in which case NULL is returned. *SEEN_ID is
2735 set to true if an identifier being declared is seen; this is used
2736 to diagnose bad forms of abstract array declarators and to
2737 determine whether an identifier list is syntactically permitted.
2740 pointer[opt] direct-declarator
2744 ( attributes[opt] declarator )
2745 direct-declarator array-declarator
2746 direct-declarator ( parameter-type-list )
2747 direct-declarator ( identifier-list[opt] )
2750 * type-qualifier-list[opt]
2751 * type-qualifier-list[opt] pointer
2753 type-qualifier-list:
2756 type-qualifier-list type-qualifier
2757 type-qualifier-list attributes
2759 parameter-type-list:
2761 parameter-list , ...
2764 parameter-declaration
2765 parameter-list , parameter-declaration
2767 parameter-declaration:
2768 declaration-specifiers declarator attributes[opt]
2769 declaration-specifiers abstract-declarator[opt] attributes[opt]
2773 identifier-list , identifier
2775 abstract-declarator:
2777 pointer[opt] direct-abstract-declarator
2779 direct-abstract-declarator:
2780 ( attributes[opt] abstract-declarator )
2781 direct-abstract-declarator[opt] array-declarator
2782 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2787 direct-declarator ( parameter-forward-declarations
2788 parameter-type-list[opt] )
2790 direct-abstract-declarator:
2791 direct-abstract-declarator[opt] ( parameter-forward-declarations
2792 parameter-type-list[opt] )
2794 parameter-forward-declarations:
2796 parameter-forward-declarations parameter-list ;
2798 The uses of attributes shown above are GNU extensions.
2800 Some forms of array declarator are not included in C99 in the
2801 syntax for abstract declarators; these are disallowed elsewhere.
2802 This may be a defect (DR#289).
2804 This function also accepts an omitted abstract declarator as being
2805 an abstract declarator, although not part of the formal syntax. */
2807 static struct c_declarator
*
2808 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2811 /* Parse any initial pointer part. */
2812 if (c_parser_next_token_is (parser
, CPP_MULT
))
2814 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2815 struct c_declarator
*inner
;
2816 c_parser_consume_token (parser
);
2817 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2818 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2822 return make_pointer_declarator (quals_attrs
, inner
);
2824 /* Now we have a direct declarator, direct abstract declarator or
2825 nothing (which counts as a direct abstract declarator here). */
2826 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2829 /* Parse a direct declarator or direct abstract declarator; arguments
2830 as c_parser_declarator. */
2832 static struct c_declarator
*
2833 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2836 /* The direct declarator must start with an identifier (possibly
2837 omitted) or a parenthesized declarator (possibly abstract). In
2838 an ordinary declarator, initial parentheses must start a
2839 parenthesized declarator. In an abstract declarator or parameter
2840 declarator, they could start a parenthesized declarator or a
2841 parameter list. To tell which, the open parenthesis and any
2842 following attributes must be read. If a declaration specifier
2843 follows, then it is a parameter list; if the specifier is a
2844 typedef name, there might be an ambiguity about redeclaring it,
2845 which is resolved in the direction of treating it as a typedef
2846 name. If a close parenthesis follows, it is also an empty
2847 parameter list, as the syntax does not permit empty abstract
2848 declarators. Otherwise, it is a parenthesized declarator (in
2849 which case the analysis may be repeated inside it, recursively).
2851 ??? There is an ambiguity in a parameter declaration "int
2852 (__attribute__((foo)) x)", where x is not a typedef name: it
2853 could be an abstract declarator for a function, or declare x with
2854 parentheses. The proper resolution of this ambiguity needs
2855 documenting. At present we follow an accident of the old
2856 parser's implementation, whereby the first parameter must have
2857 some declaration specifiers other than just attributes. Thus as
2858 a parameter declaration it is treated as a parenthesized
2859 parameter named x, and as an abstract declarator it is
2862 ??? Also following the old parser, attributes inside an empty
2863 parameter list are ignored, making it a list not yielding a
2864 prototype, rather than giving an error or making it have one
2865 parameter with implicit type int.
2867 ??? Also following the old parser, typedef names may be
2868 redeclared in declarators, but not Objective-C class names. */
2870 if (kind
!= C_DTR_ABSTRACT
2871 && c_parser_next_token_is (parser
, CPP_NAME
)
2873 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
2874 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
2875 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2877 struct c_declarator
*inner
2878 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2880 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2881 c_parser_consume_token (parser
);
2882 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2885 if (kind
!= C_DTR_NORMAL
2886 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2888 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2889 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2892 /* Either we are at the end of an abstract declarator, or we have
2895 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2898 struct c_declarator
*inner
;
2899 c_parser_consume_token (parser
);
2900 attrs
= c_parser_attributes (parser
);
2901 if (kind
!= C_DTR_NORMAL
2902 && (c_parser_next_token_starts_declspecs (parser
)
2903 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2905 struct c_arg_info
*args
2906 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2913 = build_function_declarator (args
,
2914 build_id_declarator (NULL_TREE
));
2915 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2919 /* A parenthesized declarator. */
2920 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2921 if (inner
!= NULL
&& attrs
!= NULL
)
2922 inner
= build_attrs_declarator (attrs
, inner
);
2923 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2925 c_parser_consume_token (parser
);
2929 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2933 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2940 if (kind
== C_DTR_NORMAL
)
2942 c_parser_error (parser
, "expected identifier or %<(%>");
2946 return build_id_declarator (NULL_TREE
);
2950 /* Parse part of a direct declarator or direct abstract declarator,
2951 given that some (in INNER) has already been parsed; ID_PRESENT is
2952 true if an identifier is present, false for an abstract
2955 static struct c_declarator
*
2956 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2957 struct c_declarator
*inner
)
2959 /* Parse a sequence of array declarators and parameter lists. */
2960 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2962 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
2963 struct c_declarator
*declarator
;
2964 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2968 c_parser_consume_token (parser
);
2969 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2970 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2972 c_parser_consume_token (parser
);
2973 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2974 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2975 if (!quals_attrs
->declspecs_seen_p
)
2977 /* If "static" is present, there must be an array dimension.
2978 Otherwise, there may be a dimension, "*", or no
2983 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2987 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2992 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2994 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2998 c_parser_consume_token (parser
);
3003 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
3009 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
3012 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3013 c_parser_consume_token (parser
);
3016 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3021 mark_exp_read (dimen
);
3022 declarator
= build_array_declarator (brace_loc
, dimen
, quals_attrs
,
3023 static_seen
, star_seen
);
3024 if (declarator
== NULL
)
3026 inner
= set_array_declarator_inner (declarator
, inner
);
3027 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3029 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
3032 struct c_arg_info
*args
;
3033 c_parser_consume_token (parser
);
3034 attrs
= c_parser_attributes (parser
);
3035 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
3040 inner
= build_function_declarator (args
, inner
);
3041 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3047 /* Parse a parameter list or identifier list, including the closing
3048 parenthesis but not the opening one. ATTRS are the attributes at
3049 the start of the list. ID_LIST_OK is true if an identifier list is
3050 acceptable; such a list must not have attributes at the start. */
3052 static struct c_arg_info
*
3053 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
3056 declare_parm_level ();
3057 /* If the list starts with an identifier, it is an identifier list.
3058 Otherwise, it is either a prototype list or an empty list. */
3061 && c_parser_next_token_is (parser
, CPP_NAME
)
3062 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3064 /* Look ahead to detect typos in type names. */
3065 && c_parser_peek_2nd_token (parser
)->type
!= CPP_NAME
3066 && c_parser_peek_2nd_token (parser
)->type
!= CPP_MULT
3067 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_PAREN
3068 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_SQUARE
)
3070 tree list
= NULL_TREE
, *nextp
= &list
;
3071 while (c_parser_next_token_is (parser
, CPP_NAME
)
3072 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
3074 *nextp
= build_tree_list (NULL_TREE
,
3075 c_parser_peek_token (parser
)->value
);
3076 nextp
= & TREE_CHAIN (*nextp
);
3077 c_parser_consume_token (parser
);
3078 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
3080 c_parser_consume_token (parser
);
3081 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3083 c_parser_error (parser
, "expected identifier");
3087 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3089 struct c_arg_info
*ret
= build_arg_info ();
3091 c_parser_consume_token (parser
);
3097 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3105 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
,
3112 /* Parse a parameter list (possibly empty), including the closing
3113 parenthesis but not the opening one. ATTRS are the attributes at
3114 the start of the list. EXPR is NULL or an expression that needs to
3115 be evaluated for the side effects of array size expressions in the
3118 static struct c_arg_info
*
3119 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
, tree expr
)
3121 bool bad_parm
= false;
3123 /* ??? Following the old parser, forward parameter declarations may
3124 use abstract declarators, and if no real parameter declarations
3125 follow the forward declarations then this is not diagnosed. Also
3126 note as above that attributes are ignored as the only contents of
3127 the parentheses, or as the only contents after forward
3129 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3131 struct c_arg_info
*ret
= build_arg_info ();
3132 c_parser_consume_token (parser
);
3135 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3137 struct c_arg_info
*ret
= build_arg_info ();
3138 /* Suppress -Wold-style-definition for this case. */
3139 ret
->types
= error_mark_node
;
3140 error_at (c_parser_peek_token (parser
)->location
,
3141 "ISO C requires a named argument before %<...%>");
3142 c_parser_consume_token (parser
);
3143 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3145 c_parser_consume_token (parser
);
3150 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3155 /* Nonempty list of parameters, either terminated with semicolon
3156 (forward declarations; recurse) or with close parenthesis (normal
3157 function) or with ", ... )" (variadic function). */
3160 /* Parse a parameter. */
3161 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
3166 push_parm_decl (parm
, &expr
);
3167 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3170 c_parser_consume_token (parser
);
3171 mark_forward_parm_decls ();
3172 new_attrs
= c_parser_attributes (parser
);
3173 return c_parser_parms_list_declarator (parser
, new_attrs
, expr
);
3175 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3177 c_parser_consume_token (parser
);
3181 return get_parm_info (false, expr
);
3183 if (!c_parser_require (parser
, CPP_COMMA
,
3184 "expected %<;%>, %<,%> or %<)%>"))
3186 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3189 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3191 c_parser_consume_token (parser
);
3192 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3194 c_parser_consume_token (parser
);
3198 return get_parm_info (true, expr
);
3202 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3210 /* Parse a parameter declaration. ATTRS are the attributes at the
3211 start of the declaration if it is the first parameter. */
3213 static struct c_parm
*
3214 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
3216 struct c_declspecs
*specs
;
3217 struct c_declarator
*declarator
;
3219 tree postfix_attrs
= NULL_TREE
;
3221 if (!c_parser_next_token_starts_declspecs (parser
))
3223 c_token
*token
= c_parser_peek_token (parser
);
3226 c_parser_set_source_position_from_token (token
);
3227 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
3229 error ("unknown type name %qE", token
->value
);
3230 parser
->error
= true;
3232 /* ??? In some Objective-C cases '...' isn't applicable so there
3233 should be a different message. */
3235 c_parser_error (parser
,
3236 "expected declaration specifiers or %<...%>");
3237 c_parser_skip_to_end_of_parameter (parser
);
3240 specs
= build_null_declspecs ();
3243 declspecs_add_attrs (specs
, attrs
);
3246 c_parser_declspecs (parser
, specs
, true, true, true, cla_nonabstract_decl
);
3247 finish_declspecs (specs
);
3248 pending_xref_error ();
3249 prefix_attrs
= specs
->attrs
;
3250 specs
->attrs
= NULL_TREE
;
3251 declarator
= c_parser_declarator (parser
,
3252 specs
->typespec_kind
!= ctsk_none
,
3253 C_DTR_PARM
, &dummy
);
3254 if (declarator
== NULL
)
3256 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3259 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3260 postfix_attrs
= c_parser_attributes (parser
);
3261 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
3265 /* Parse a string literal in an asm expression. It should not be
3266 translated, and wide string literals are an error although
3267 permitted by the syntax. This is a GNU extension.
3272 ??? At present, following the old parser, the caller needs to have
3273 set lex_untranslated_string to 1. It would be better to follow the
3274 C++ parser rather than using this kludge. */
3277 c_parser_asm_string_literal (c_parser
*parser
)
3280 int save_flag
= warn_overlength_strings
;
3281 warn_overlength_strings
= 0;
3282 if (c_parser_next_token_is (parser
, CPP_STRING
))
3284 str
= c_parser_peek_token (parser
)->value
;
3285 c_parser_consume_token (parser
);
3287 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
3289 error_at (c_parser_peek_token (parser
)->location
,
3290 "wide string literal in %<asm%>");
3291 str
= build_string (1, "");
3292 c_parser_consume_token (parser
);
3296 c_parser_error (parser
, "expected string literal");
3299 warn_overlength_strings
= save_flag
;
3303 /* Parse a simple asm expression. This is used in restricted
3304 contexts, where a full expression with inputs and outputs does not
3305 make sense. This is a GNU extension.
3308 asm ( asm-string-literal )
3312 c_parser_simple_asm_expr (c_parser
*parser
)
3315 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
3316 /* ??? Follow the C++ parser rather than using the
3317 lex_untranslated_string kludge. */
3318 parser
->lex_untranslated_string
= true;
3319 c_parser_consume_token (parser
);
3320 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3322 parser
->lex_untranslated_string
= false;
3325 str
= c_parser_asm_string_literal (parser
);
3326 parser
->lex_untranslated_string
= false;
3327 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
3329 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3335 /* Parse (possibly empty) attributes. This is a GNU extension.
3339 attributes attribute
3342 __attribute__ ( ( attribute-list ) )
3346 attribute_list , attrib
3351 any-word ( identifier )
3352 any-word ( identifier , nonempty-expr-list )
3353 any-word ( expr-list )
3355 where the "identifier" must not be declared as a type, and
3356 "any-word" may be any identifier (including one declared as a
3357 type), a reserved word storage class specifier, type specifier or
3358 type qualifier. ??? This still leaves out most reserved keywords
3359 (following the old parser), shouldn't we include them, and why not
3360 allow identifiers declared as types to start the arguments? */
3363 c_parser_attributes (c_parser
*parser
)
3365 tree attrs
= NULL_TREE
;
3366 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3368 /* ??? Follow the C++ parser rather than using the
3369 lex_untranslated_string kludge. */
3370 parser
->lex_untranslated_string
= true;
3371 c_parser_consume_token (parser
);
3372 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3374 parser
->lex_untranslated_string
= false;
3377 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3379 parser
->lex_untranslated_string
= false;
3380 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3383 /* Parse the attribute list. */
3384 while (c_parser_next_token_is (parser
, CPP_COMMA
)
3385 || c_parser_next_token_is (parser
, CPP_NAME
)
3386 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
3388 tree attr
, attr_name
, attr_args
;
3389 VEC(tree
,gc
) *expr_list
;
3390 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3392 c_parser_consume_token (parser
);
3395 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
3397 /* ??? See comment above about what keywords are
3400 switch (c_parser_peek_token (parser
)->keyword
)
3438 /* Accept __attribute__((__const)) as __attribute__((const))
3441 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
3444 attr_name
= c_parser_peek_token (parser
)->value
;
3445 c_parser_consume_token (parser
);
3446 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
3448 attr
= build_tree_list (attr_name
, NULL_TREE
);
3449 attrs
= chainon (attrs
, attr
);
3452 c_parser_consume_token (parser
);
3453 /* Parse the attribute contents. If they start with an
3454 identifier which is followed by a comma or close
3455 parenthesis, then the arguments start with that
3456 identifier; otherwise they are an expression list.
3457 In objective-c the identifier may be a classname. */
3458 if (c_parser_next_token_is (parser
, CPP_NAME
)
3459 && (c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3460 || (c_dialect_objc ()
3461 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
3462 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
3463 || (c_parser_peek_2nd_token (parser
)->type
3464 == CPP_CLOSE_PAREN
)))
3466 tree arg1
= c_parser_peek_token (parser
)->value
;
3467 c_parser_consume_token (parser
);
3468 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3469 attr_args
= build_tree_list (NULL_TREE
, arg1
);
3473 c_parser_consume_token (parser
);
3474 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
3475 tree_list
= build_tree_list_vec (expr_list
);
3476 attr_args
= tree_cons (NULL_TREE
, arg1
, tree_list
);
3477 release_tree_vector (expr_list
);
3482 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3483 attr_args
= NULL_TREE
;
3486 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
3487 attr_args
= build_tree_list_vec (expr_list
);
3488 release_tree_vector (expr_list
);
3491 attr
= build_tree_list (attr_name
, attr_args
);
3492 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3493 c_parser_consume_token (parser
);
3496 parser
->lex_untranslated_string
= false;
3497 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3501 attrs
= chainon (attrs
, attr
);
3503 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3504 c_parser_consume_token (parser
);
3507 parser
->lex_untranslated_string
= false;
3508 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3512 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3513 c_parser_consume_token (parser
);
3516 parser
->lex_untranslated_string
= false;
3517 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3521 parser
->lex_untranslated_string
= false;
3526 /* Parse a type name (C90 6.5.5, C99 6.7.6).
3529 specifier-qualifier-list abstract-declarator[opt]
3532 static struct c_type_name
*
3533 c_parser_type_name (c_parser
*parser
)
3535 struct c_declspecs
*specs
= build_null_declspecs ();
3536 struct c_declarator
*declarator
;
3537 struct c_type_name
*ret
;
3539 c_parser_declspecs (parser
, specs
, false, true, true, cla_prefer_type
);
3540 if (!specs
->declspecs_seen_p
)
3542 c_parser_error (parser
, "expected specifier-qualifier-list");
3545 if (specs
->type
!= error_mark_node
)
3547 pending_xref_error ();
3548 finish_declspecs (specs
);
3550 declarator
= c_parser_declarator (parser
,
3551 specs
->typespec_kind
!= ctsk_none
,
3552 C_DTR_ABSTRACT
, &dummy
);
3553 if (declarator
== NULL
)
3555 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
3557 ret
->declarator
= declarator
;
3561 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
3564 assignment-expression
3565 { initializer-list }
3566 { initializer-list , }
3569 designation[opt] initializer
3570 initializer-list , designation[opt] initializer
3577 designator-list designator
3584 [ constant-expression ]
3596 [ constant-expression ... constant-expression ]
3598 Any expression without commas is accepted in the syntax for the
3599 constant-expressions, with non-constant expressions rejected later.
3601 This function is only used for top-level initializers; for nested
3602 ones, see c_parser_initval. */
3604 static struct c_expr
3605 c_parser_initializer (c_parser
*parser
)
3607 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3608 return c_parser_braced_init (parser
, NULL_TREE
, false);
3612 location_t loc
= c_parser_peek_token (parser
)->location
;
3613 ret
= c_parser_expr_no_commas (parser
, NULL
);
3614 if (TREE_CODE (ret
.value
) != STRING_CST
3615 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3616 ret
= default_function_array_read_conversion (loc
, ret
);
3621 /* Parse a braced initializer list. TYPE is the type specified for a
3622 compound literal, and NULL_TREE for other initializers and for
3623 nested braced lists. NESTED_P is true for nested braced lists,
3624 false for the list of a compound literal or the list that is the
3625 top-level initializer in a declaration. */
3627 static struct c_expr
3628 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3631 struct obstack braced_init_obstack
;
3632 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3633 gcc_obstack_init (&braced_init_obstack
);
3634 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3635 c_parser_consume_token (parser
);
3637 push_init_level (0, &braced_init_obstack
);
3639 really_start_incremental_init (type
);
3640 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3642 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3646 /* Parse a non-empty initializer list, possibly with a trailing
3650 c_parser_initelt (parser
, &braced_init_obstack
);
3653 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3654 c_parser_consume_token (parser
);
3657 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3661 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3663 ret
.value
= error_mark_node
;
3664 ret
.original_code
= ERROR_MARK
;
3665 ret
.original_type
= NULL
;
3666 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3667 pop_init_level (0, &braced_init_obstack
);
3668 obstack_free (&braced_init_obstack
, NULL
);
3671 c_parser_consume_token (parser
);
3672 ret
= pop_init_level (0, &braced_init_obstack
);
3673 obstack_free (&braced_init_obstack
, NULL
);
3677 /* Parse a nested initializer, including designators. */
3680 c_parser_initelt (c_parser
*parser
, struct obstack
* braced_init_obstack
)
3682 /* Parse any designator or designator list. A single array
3683 designator may have the subsequent "=" omitted in GNU C, but a
3684 longer list or a structure member designator may not. */
3685 if (c_parser_next_token_is (parser
, CPP_NAME
)
3686 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3688 /* Old-style structure member designator. */
3689 set_init_label (c_parser_peek_token (parser
)->value
,
3690 braced_init_obstack
);
3691 /* Use the colon as the error location. */
3692 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3693 "obsolete use of designated initializer with %<:%>");
3694 c_parser_consume_token (parser
);
3695 c_parser_consume_token (parser
);
3699 /* des_seen is 0 if there have been no designators, 1 if there
3700 has been a single array designator and 2 otherwise. */
3702 /* Location of a designator. */
3703 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3704 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3705 || c_parser_next_token_is (parser
, CPP_DOT
))
3707 int des_prev
= des_seen
;
3709 des_loc
= c_parser_peek_token (parser
)->location
;
3712 if (c_parser_next_token_is (parser
, CPP_DOT
))
3715 c_parser_consume_token (parser
);
3716 if (c_parser_next_token_is (parser
, CPP_NAME
))
3718 set_init_label (c_parser_peek_token (parser
)->value
,
3719 braced_init_obstack
);
3720 c_parser_consume_token (parser
);
3725 init
.value
= error_mark_node
;
3726 init
.original_code
= ERROR_MARK
;
3727 init
.original_type
= NULL
;
3728 c_parser_error (parser
, "expected identifier");
3729 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3730 process_init_element (init
, false, braced_init_obstack
);
3737 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3738 /* ??? Following the old parser, [ objc-receiver
3739 objc-message-args ] is accepted as an initializer,
3740 being distinguished from a designator by what follows
3741 the first assignment expression inside the square
3742 brackets, but after a first array designator a
3743 subsequent square bracket is for Objective-C taken to
3744 start an expression, using the obsolete form of
3745 designated initializer without '=', rather than
3746 possibly being a second level of designation: in LALR
3747 terms, the '[' is shifted rather than reducing
3748 designator to designator-list. */
3749 if (des_prev
== 1 && c_dialect_objc ())
3751 des_seen
= des_prev
;
3754 if (des_prev
== 0 && c_dialect_objc ())
3756 /* This might be an array designator or an
3757 Objective-C message expression. If the former,
3758 continue parsing here; if the latter, parse the
3759 remainder of the initializer given the starting
3760 primary-expression. ??? It might make sense to
3761 distinguish when des_prev == 1 as well; see
3762 previous comment. */
3764 struct c_expr mexpr
;
3765 c_parser_consume_token (parser
);
3766 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3767 && ((c_parser_peek_token (parser
)->id_kind
3769 || (c_parser_peek_token (parser
)->id_kind
3770 == C_ID_CLASSNAME
)))
3772 /* Type name receiver. */
3773 tree id
= c_parser_peek_token (parser
)->value
;
3774 c_parser_consume_token (parser
);
3775 rec
= objc_get_class_reference (id
);
3776 goto parse_message_args
;
3778 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3779 mark_exp_read (first
);
3780 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3781 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3782 goto array_desig_after_first
;
3783 /* Expression receiver. So far only one part
3784 without commas has been parsed; there might be
3785 more of the expression. */
3787 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3790 location_t comma_loc
, exp_loc
;
3791 comma_loc
= c_parser_peek_token (parser
)->location
;
3792 c_parser_consume_token (parser
);
3793 exp_loc
= c_parser_peek_token (parser
)->location
;
3794 next
= c_parser_expr_no_commas (parser
, NULL
);
3795 next
= default_function_array_read_conversion (exp_loc
,
3797 rec
= build_compound_expr (comma_loc
, rec
, next
.value
);
3800 /* Now parse the objc-message-args. */
3801 args
= c_parser_objc_message_args (parser
);
3802 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3805 = objc_build_message_expr (rec
, args
);
3806 mexpr
.original_code
= ERROR_MARK
;
3807 mexpr
.original_type
= NULL
;
3808 /* Now parse and process the remainder of the
3809 initializer, starting with this message
3810 expression as a primary-expression. */
3811 c_parser_initval (parser
, &mexpr
, braced_init_obstack
);
3814 c_parser_consume_token (parser
);
3815 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3816 mark_exp_read (first
);
3817 array_desig_after_first
:
3818 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3820 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3821 c_parser_consume_token (parser
);
3822 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3823 mark_exp_read (second
);
3827 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3829 c_parser_consume_token (parser
);
3830 set_init_index (first
, second
, braced_init_obstack
);
3832 pedwarn (ellipsis_loc
, OPT_pedantic
,
3833 "ISO C forbids specifying range of elements to initialize");
3836 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3842 if (c_parser_next_token_is (parser
, CPP_EQ
))
3845 pedwarn (des_loc
, OPT_pedantic
,
3846 "ISO C90 forbids specifying subobject to initialize");
3847 c_parser_consume_token (parser
);
3852 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3853 "obsolete use of designated initializer without %<=%>");
3857 init
.value
= error_mark_node
;
3858 init
.original_code
= ERROR_MARK
;
3859 init
.original_type
= NULL
;
3860 c_parser_error (parser
, "expected %<=%>");
3861 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3862 process_init_element (init
, false, braced_init_obstack
);
3868 c_parser_initval (parser
, NULL
, braced_init_obstack
);
3871 /* Parse a nested initializer; as c_parser_initializer but parses
3872 initializers within braced lists, after any designators have been
3873 applied. If AFTER is not NULL then it is an Objective-C message
3874 expression which is the primary-expression starting the
3878 c_parser_initval (c_parser
*parser
, struct c_expr
*after
,
3879 struct obstack
* braced_init_obstack
)
3882 gcc_assert (!after
|| c_dialect_objc ());
3883 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3884 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3887 location_t loc
= c_parser_peek_token (parser
)->location
;
3888 init
= c_parser_expr_no_commas (parser
, after
);
3889 if (init
.value
!= NULL_TREE
3890 && TREE_CODE (init
.value
) != STRING_CST
3891 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3892 init
= default_function_array_read_conversion (loc
, init
);
3894 process_init_element (init
, false, braced_init_obstack
);
3897 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3901 { block-item-list[opt] }
3902 { label-declarations block-item-list }
3906 block-item-list block-item
3918 { label-declarations block-item-list }
3921 __extension__ nested-declaration
3922 nested-function-definition
3926 label-declarations label-declaration
3929 __label__ identifier-list ;
3931 Allowing the mixing of declarations and code is new in C99. The
3932 GNU syntax also permits (not shown above) labels at the end of
3933 compound statements, which yield an error. We don't allow labels
3934 on declarations; this might seem like a natural extension, but
3935 there would be a conflict between attributes on the label and
3936 prefix attributes on the declaration. ??? The syntax follows the
3937 old parser in requiring something after label declarations.
3938 Although they are erroneous if the labels declared aren't defined,
3939 is it useful for the syntax to be this way?
3951 c_parser_compound_statement (c_parser
*parser
)
3954 location_t brace_loc
;
3955 brace_loc
= c_parser_peek_token (parser
)->location
;
3956 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3958 /* Ensure a scope is entered and left anyway to avoid confusion
3959 if we have just prepared to enter a function body. */
3960 stmt
= c_begin_compound_stmt (true);
3961 c_end_compound_stmt (brace_loc
, stmt
, true);
3962 return error_mark_node
;
3964 stmt
= c_begin_compound_stmt (true);
3965 c_parser_compound_statement_nostart (parser
);
3966 return c_end_compound_stmt (brace_loc
, stmt
, true);
3969 /* Parse a compound statement except for the opening brace. This is
3970 used for parsing both compound statements and statement expressions
3971 (which follow different paths to handling the opening). */
3974 c_parser_compound_statement_nostart (c_parser
*parser
)
3976 bool last_stmt
= false;
3977 bool last_label
= false;
3978 bool save_valid_for_pragma
= valid_location_for_stdc_pragma_p ();
3979 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3980 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3982 c_parser_consume_token (parser
);
3985 mark_valid_location_for_stdc_pragma (true);
3986 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3988 /* Read zero or more forward-declarations for labels that nested
3989 functions can jump to. */
3990 mark_valid_location_for_stdc_pragma (false);
3991 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3993 label_loc
= c_parser_peek_token (parser
)->location
;
3994 c_parser_consume_token (parser
);
3995 /* Any identifiers, including those declared as type names,
4000 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
4002 c_parser_error (parser
, "expected identifier");
4006 = declare_label (c_parser_peek_token (parser
)->value
);
4007 C_DECLARED_LABEL_FLAG (label
) = 1;
4008 add_stmt (build_stmt (label_loc
, DECL_EXPR
, label
));
4009 c_parser_consume_token (parser
);
4010 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4011 c_parser_consume_token (parser
);
4015 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4017 pedwarn (label_loc
, OPT_pedantic
, "ISO C forbids label declarations");
4019 /* We must now have at least one statement, label or declaration. */
4020 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
4022 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4023 c_parser_error (parser
, "expected declaration or statement");
4024 c_parser_consume_token (parser
);
4027 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
4029 location_t loc
= c_parser_peek_token (parser
)->location
;
4030 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4031 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4032 || (c_parser_next_token_is (parser
, CPP_NAME
)
4033 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4035 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4036 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
4038 label_loc
= c_parser_peek_token (parser
)->location
;
4041 mark_valid_location_for_stdc_pragma (false);
4042 c_parser_label (parser
);
4044 else if (!last_label
4045 && c_parser_next_tokens_start_declaration (parser
))
4048 mark_valid_location_for_stdc_pragma (false);
4049 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
4052 (pedantic
&& !flag_isoc99
)
4054 : OPT_Wdeclaration_after_statement
,
4055 "ISO C90 forbids mixed declarations and code");
4058 else if (!last_label
4059 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4061 /* __extension__ can start a declaration, but is also an
4062 unary operator that can start an expression. Consume all
4063 but the last of a possible series of __extension__ to
4065 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4066 && (c_parser_peek_2nd_token (parser
)->keyword
4068 c_parser_consume_token (parser
);
4069 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4072 ext
= disable_extension_diagnostics ();
4073 c_parser_consume_token (parser
);
4075 mark_valid_location_for_stdc_pragma (false);
4076 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4078 /* Following the old parser, __extension__ does not
4079 disable this diagnostic. */
4080 restore_extension_diagnostics (ext
);
4082 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
4084 : OPT_Wdeclaration_after_statement
,
4085 "ISO C90 forbids mixed declarations and code");
4091 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
4093 /* External pragmas, and some omp pragmas, are not associated
4094 with regular c code, and so are not to be considered statements
4095 syntactically. This ensures that the user doesn't put them
4096 places that would turn into syntax errors if the directive
4098 if (c_parser_pragma (parser
, pragma_compound
))
4099 last_label
= false, last_stmt
= true;
4101 else if (c_parser_next_token_is (parser
, CPP_EOF
))
4103 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4104 c_parser_error (parser
, "expected declaration or statement");
4107 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4109 if (parser
->in_if_block
)
4111 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4112 error_at (loc
, """expected %<}%> before %<else%>");
4117 error_at (loc
, "%<else%> without a previous %<if%>");
4118 c_parser_consume_token (parser
);
4127 mark_valid_location_for_stdc_pragma (false);
4128 c_parser_statement_after_labels (parser
);
4131 parser
->error
= false;
4134 error_at (label_loc
, "label at end of compound statement");
4135 c_parser_consume_token (parser
);
4136 /* Restore the value we started with. */
4137 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4140 /* Parse a label (C90 6.6.1, C99 6.8.1).
4143 identifier : attributes[opt]
4144 case constant-expression :
4150 case constant-expression ... constant-expression :
4152 The use of attributes on labels is a GNU extension. The syntax in
4153 GNU C accepts any expressions without commas, non-constant
4154 expressions being rejected later. */
4157 c_parser_label (c_parser
*parser
)
4159 location_t loc1
= c_parser_peek_token (parser
)->location
;
4160 tree label
= NULL_TREE
;
4161 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4164 c_parser_consume_token (parser
);
4165 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
4166 if (c_parser_next_token_is (parser
, CPP_COLON
))
4168 c_parser_consume_token (parser
);
4169 label
= do_case (loc1
, exp1
, NULL_TREE
);
4171 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
4173 c_parser_consume_token (parser
);
4174 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
4175 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4176 label
= do_case (loc1
, exp1
, exp2
);
4179 c_parser_error (parser
, "expected %<:%> or %<...%>");
4181 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
4183 c_parser_consume_token (parser
);
4184 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4185 label
= do_case (loc1
, NULL_TREE
, NULL_TREE
);
4189 tree name
= c_parser_peek_token (parser
)->value
;
4192 location_t loc2
= c_parser_peek_token (parser
)->location
;
4193 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
4194 c_parser_consume_token (parser
);
4195 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
4196 c_parser_consume_token (parser
);
4197 attrs
= c_parser_attributes (parser
);
4198 tlab
= define_label (loc2
, name
);
4201 decl_attributes (&tlab
, attrs
, 0);
4202 label
= add_stmt (build_stmt (loc1
, LABEL_EXPR
, tlab
));
4207 if (c_parser_next_tokens_start_declaration (parser
))
4209 error_at (c_parser_peek_token (parser
)->location
,
4210 "a label can only be part of a statement and "
4211 "a declaration is not a statement");
4212 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
4213 /*static_assert_ok*/ true,
4214 /*nested*/ true, /*empty_ok*/ false,
4215 /*start_attr_ok*/ true, NULL
);
4220 /* Parse a statement (C90 6.6, C99 6.8).
4225 expression-statement
4233 expression-statement:
4236 selection-statement:
4240 iteration-statement:
4249 return expression[opt] ;
4262 objc-throw-statement
4263 objc-try-catch-statement
4264 objc-synchronized-statement
4266 objc-throw-statement:
4280 parallel-for-construct
4281 parallel-sections-construct
4288 parallel-directive structured-block
4291 for-directive iteration-statement
4294 sections-directive section-scope
4297 single-directive structured-block
4299 parallel-for-construct:
4300 parallel-for-directive iteration-statement
4302 parallel-sections-construct:
4303 parallel-sections-directive section-scope
4306 master-directive structured-block
4309 critical-directive structured-block
4312 atomic-directive expression-statement
4315 ordered-directive structured-block */
4318 c_parser_statement (c_parser
*parser
)
4320 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4321 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4322 || (c_parser_next_token_is (parser
, CPP_NAME
)
4323 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4324 c_parser_label (parser
);
4325 c_parser_statement_after_labels (parser
);
4328 /* Parse a statement, other than a labeled statement. */
4331 c_parser_statement_after_labels (c_parser
*parser
)
4333 location_t loc
= c_parser_peek_token (parser
)->location
;
4334 tree stmt
= NULL_TREE
;
4335 bool in_if_block
= parser
->in_if_block
;
4336 parser
->in_if_block
= false;
4337 switch (c_parser_peek_token (parser
)->type
)
4339 case CPP_OPEN_BRACE
:
4340 add_stmt (c_parser_compound_statement (parser
));
4343 switch (c_parser_peek_token (parser
)->keyword
)
4346 c_parser_if_statement (parser
);
4349 c_parser_switch_statement (parser
);
4352 c_parser_while_statement (parser
);
4355 c_parser_do_statement (parser
);
4358 c_parser_for_statement (parser
);
4361 c_parser_consume_token (parser
);
4362 if (c_parser_next_token_is (parser
, CPP_NAME
))
4364 stmt
= c_finish_goto_label (loc
,
4365 c_parser_peek_token (parser
)->value
);
4366 c_parser_consume_token (parser
);
4368 else if (c_parser_next_token_is (parser
, CPP_MULT
))
4372 c_parser_consume_token (parser
);
4373 val
= c_parser_expression (parser
).value
;
4374 mark_exp_read (val
);
4375 stmt
= c_finish_goto_ptr (loc
, val
);
4378 c_parser_error (parser
, "expected identifier or %<*%>");
4379 goto expect_semicolon
;
4381 c_parser_consume_token (parser
);
4382 stmt
= c_finish_bc_stmt (loc
, &c_cont_label
, false);
4383 goto expect_semicolon
;
4385 c_parser_consume_token (parser
);
4386 stmt
= c_finish_bc_stmt (loc
, &c_break_label
, true);
4387 goto expect_semicolon
;
4389 c_parser_consume_token (parser
);
4390 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4392 stmt
= c_finish_return (loc
, NULL_TREE
, NULL_TREE
);
4393 c_parser_consume_token (parser
);
4397 struct c_expr expr
= c_parser_expression_conv (parser
);
4398 mark_exp_read (expr
.value
);
4399 stmt
= c_finish_return (loc
, expr
.value
, expr
.original_type
);
4400 goto expect_semicolon
;
4404 stmt
= c_parser_asm_statement (parser
);
4407 gcc_assert (c_dialect_objc ());
4408 c_parser_consume_token (parser
);
4409 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4411 stmt
= objc_build_throw_stmt (loc
, NULL_TREE
);
4412 c_parser_consume_token (parser
);
4416 tree expr
= c_parser_expression (parser
).value
;
4417 expr
= c_fully_fold (expr
, false, NULL
);
4418 stmt
= objc_build_throw_stmt (loc
, expr
);
4419 goto expect_semicolon
;
4423 gcc_assert (c_dialect_objc ());
4424 c_parser_objc_try_catch_finally_statement (parser
);
4426 case RID_AT_SYNCHRONIZED
:
4427 gcc_assert (c_dialect_objc ());
4428 c_parser_objc_synchronized_statement (parser
);
4435 c_parser_consume_token (parser
);
4437 case CPP_CLOSE_PAREN
:
4438 case CPP_CLOSE_SQUARE
:
4439 /* Avoid infinite loop in error recovery:
4440 c_parser_skip_until_found stops at a closing nesting
4441 delimiter without consuming it, but here we need to consume
4442 it to proceed further. */
4443 c_parser_error (parser
, "expected statement");
4444 c_parser_consume_token (parser
);
4447 c_parser_pragma (parser
, pragma_stmt
);
4451 stmt
= c_finish_expr_stmt (loc
, c_parser_expression_conv (parser
).value
);
4453 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4456 /* Two cases cannot and do not have line numbers associated: If stmt
4457 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
4458 cannot hold line numbers. But that's OK because the statement
4459 will either be changed to a MODIFY_EXPR during gimplification of
4460 the statement expr, or discarded. If stmt was compound, but
4461 without new variables, we will have skipped the creation of a
4462 BIND and will have a bare STATEMENT_LIST. But that's OK because
4463 (recursively) all of the component statements should already have
4464 line numbers assigned. ??? Can we discard no-op statements
4466 if (CAN_HAVE_LOCATION_P (stmt
)
4467 && EXPR_LOCATION (stmt
) == UNKNOWN_LOCATION
)
4468 SET_EXPR_LOCATION (stmt
, loc
);
4470 parser
->in_if_block
= in_if_block
;
4473 /* Parse the condition from an if, do, while or for statements. */
4476 c_parser_condition (c_parser
*parser
)
4478 location_t loc
= c_parser_peek_token (parser
)->location
;
4480 cond
= c_parser_expression_conv (parser
).value
;
4481 cond
= c_objc_common_truthvalue_conversion (loc
, cond
);
4482 cond
= c_fully_fold (cond
, false, NULL
);
4483 if (warn_sequence_point
)
4484 verify_sequence_points (cond
);
4488 /* Parse a parenthesized condition from an if, do or while statement.
4494 c_parser_paren_condition (c_parser
*parser
)
4497 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4498 return error_mark_node
;
4499 cond
= c_parser_condition (parser
);
4500 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4504 /* Parse a statement which is a block in C99. */
4507 c_parser_c99_block_statement (c_parser
*parser
)
4509 tree block
= c_begin_compound_stmt (flag_isoc99
);
4510 location_t loc
= c_parser_peek_token (parser
)->location
;
4511 c_parser_statement (parser
);
4512 return c_end_compound_stmt (loc
, block
, flag_isoc99
);
4515 /* Parse the body of an if statement. This is just parsing a
4516 statement but (a) it is a block in C99, (b) we track whether the
4517 body is an if statement for the sake of -Wparentheses warnings, (c)
4518 we handle an empty body specially for the sake of -Wempty-body
4519 warnings, and (d) we call parser_compound_statement directly
4520 because c_parser_statement_after_labels resets
4521 parser->in_if_block. */
4524 c_parser_if_body (c_parser
*parser
, bool *if_p
)
4526 tree block
= c_begin_compound_stmt (flag_isoc99
);
4527 location_t body_loc
= c_parser_peek_token (parser
)->location
;
4528 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4529 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4530 || (c_parser_next_token_is (parser
, CPP_NAME
)
4531 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4532 c_parser_label (parser
);
4533 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
4534 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4536 location_t loc
= c_parser_peek_token (parser
)->location
;
4537 add_stmt (build_empty_stmt (loc
));
4538 c_parser_consume_token (parser
);
4539 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4540 warning_at (loc
, OPT_Wempty_body
,
4541 "suggest braces around empty body in an %<if%> statement");
4543 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4544 add_stmt (c_parser_compound_statement (parser
));
4546 c_parser_statement_after_labels (parser
);
4547 return c_end_compound_stmt (body_loc
, block
, flag_isoc99
);
4550 /* Parse the else body of an if statement. This is just parsing a
4551 statement but (a) it is a block in C99, (b) we handle an empty body
4552 specially for the sake of -Wempty-body warnings. */
4555 c_parser_else_body (c_parser
*parser
)
4557 location_t else_loc
= c_parser_peek_token (parser
)->location
;
4558 tree block
= c_begin_compound_stmt (flag_isoc99
);
4559 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4560 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4561 || (c_parser_next_token_is (parser
, CPP_NAME
)
4562 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4563 c_parser_label (parser
);
4564 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4566 location_t loc
= c_parser_peek_token (parser
)->location
;
4569 "suggest braces around empty body in an %<else%> statement");
4570 add_stmt (build_empty_stmt (loc
));
4571 c_parser_consume_token (parser
);
4574 c_parser_statement_after_labels (parser
);
4575 return c_end_compound_stmt (else_loc
, block
, flag_isoc99
);
4578 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
4581 if ( expression ) statement
4582 if ( expression ) statement else statement
4586 c_parser_if_statement (c_parser
*parser
)
4591 bool first_if
= false;
4592 tree first_body
, second_body
;
4595 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
4596 c_parser_consume_token (parser
);
4597 block
= c_begin_compound_stmt (flag_isoc99
);
4598 loc
= c_parser_peek_token (parser
)->location
;
4599 cond
= c_parser_paren_condition (parser
);
4600 in_if_block
= parser
->in_if_block
;
4601 parser
->in_if_block
= true;
4602 first_body
= c_parser_if_body (parser
, &first_if
);
4603 parser
->in_if_block
= in_if_block
;
4604 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4606 c_parser_consume_token (parser
);
4607 second_body
= c_parser_else_body (parser
);
4610 second_body
= NULL_TREE
;
4611 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
4612 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4615 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
4618 switch (expression) statement
4622 c_parser_switch_statement (c_parser
*parser
)
4624 tree block
, expr
, body
, save_break
;
4625 location_t switch_loc
= c_parser_peek_token (parser
)->location
;
4626 location_t switch_cond_loc
;
4627 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
4628 c_parser_consume_token (parser
);
4629 block
= c_begin_compound_stmt (flag_isoc99
);
4630 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4632 switch_cond_loc
= c_parser_peek_token (parser
)->location
;
4633 expr
= c_parser_expression (parser
).value
;
4634 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4638 switch_cond_loc
= UNKNOWN_LOCATION
;
4639 expr
= error_mark_node
;
4641 c_start_case (switch_loc
, switch_cond_loc
, expr
);
4642 save_break
= c_break_label
;
4643 c_break_label
= NULL_TREE
;
4644 body
= c_parser_c99_block_statement (parser
);
4645 c_finish_case (body
);
4648 location_t here
= c_parser_peek_token (parser
)->location
;
4649 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_break_label
);
4650 SET_EXPR_LOCATION (t
, here
);
4653 c_break_label
= save_break
;
4654 add_stmt (c_end_compound_stmt (switch_loc
, block
, flag_isoc99
));
4657 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
4660 while (expression) statement
4664 c_parser_while_statement (c_parser
*parser
)
4666 tree block
, cond
, body
, save_break
, save_cont
;
4668 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
4669 c_parser_consume_token (parser
);
4670 block
= c_begin_compound_stmt (flag_isoc99
);
4671 loc
= c_parser_peek_token (parser
)->location
;
4672 cond
= c_parser_paren_condition (parser
);
4673 save_break
= c_break_label
;
4674 c_break_label
= NULL_TREE
;
4675 save_cont
= c_cont_label
;
4676 c_cont_label
= NULL_TREE
;
4677 body
= c_parser_c99_block_statement (parser
);
4678 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
4679 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4680 c_break_label
= save_break
;
4681 c_cont_label
= save_cont
;
4684 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4687 do statement while ( expression ) ;
4691 c_parser_do_statement (c_parser
*parser
)
4693 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4695 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4696 c_parser_consume_token (parser
);
4697 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4698 warning_at (c_parser_peek_token (parser
)->location
,
4700 "suggest braces around empty body in %<do%> statement");
4701 block
= c_begin_compound_stmt (flag_isoc99
);
4702 loc
= c_parser_peek_token (parser
)->location
;
4703 save_break
= c_break_label
;
4704 c_break_label
= NULL_TREE
;
4705 save_cont
= c_cont_label
;
4706 c_cont_label
= NULL_TREE
;
4707 body
= c_parser_c99_block_statement (parser
);
4708 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4709 new_break
= c_break_label
;
4710 c_break_label
= save_break
;
4711 new_cont
= c_cont_label
;
4712 c_cont_label
= save_cont
;
4713 cond
= c_parser_paren_condition (parser
);
4714 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4715 c_parser_skip_to_end_of_block_or_statement (parser
);
4716 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4717 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4720 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4723 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4724 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4726 The form with a declaration is new in C99.
4728 ??? In accordance with the old parser, the declaration may be a
4729 nested function, which is then rejected in check_for_loop_decls,
4730 but does it make any sense for this to be included in the grammar?
4731 Note in particular that the nested function does not include a
4732 trailing ';', whereas the "declaration" production includes one.
4733 Also, can we reject bad declarations earlier and cheaper than
4734 check_for_loop_decls?
4736 In Objective-C, there are two additional variants:
4739 for ( expression in expresssion ) statement
4740 for ( declaration in expression ) statement
4742 This is inconsistent with C, because the second variant is allowed
4743 even if c99 is not enabled.
4745 The rest of the comment documents these Objective-C foreach-statement.
4747 Here is the canonical example of the first variant:
4748 for (object in array) { do something with object }
4749 we call the first expression ("object") the "object_expression" and
4750 the second expression ("array") the "collection_expression".
4751 object_expression must be an lvalue of type "id" (a generic Objective-C
4752 object) because the loop works by assigning to object_expression the
4753 various objects from the collection_expression. collection_expression
4754 must evaluate to something of type "id" which responds to the method
4755 countByEnumeratingWithState:objects:count:.
4757 The canonical example of the second variant is:
4758 for (id object in array) { do something with object }
4759 which is completely equivalent to
4762 for (object in array) { do something with object }
4764 Note that initizializing 'object' in some way (eg, "for ((object =
4765 xxx) in array) { do something with object }") is possibly
4766 technically valid, but completely pointless as 'object' will be
4767 assigned to something else as soon as the loop starts. We should
4768 most likely reject it (TODO).
4770 The beginning of the Objective-C foreach-statement looks exactly
4771 like the beginning of the for-statement, and we can tell it is a
4772 foreach-statement only because the initial declaration or
4773 expression is terminated by 'in' instead of ';'.
4777 c_parser_for_statement (c_parser
*parser
)
4779 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4780 /* The following are only used when parsing an ObjC foreach statement. */
4781 tree object_expression
;
4782 /* Silence the bogus uninitialized warning. */
4783 tree collection_expression
= NULL
;
4784 location_t loc
= c_parser_peek_token (parser
)->location
;
4785 location_t for_loc
= c_parser_peek_token (parser
)->location
;
4786 bool is_foreach_statement
= false;
4787 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4788 c_parser_consume_token (parser
);
4789 /* Open a compound statement in Objective-C as well, just in case this is
4790 as foreach expression. */
4791 block
= c_begin_compound_stmt (flag_isoc99
|| c_dialect_objc ());
4792 cond
= error_mark_node
;
4793 incr
= error_mark_node
;
4794 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4796 /* Parse the initialization declaration or expression. */
4797 object_expression
= error_mark_node
;
4798 parser
->objc_could_be_foreach_context
= c_dialect_objc ();
4799 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4801 parser
->objc_could_be_foreach_context
= false;
4802 c_parser_consume_token (parser
);
4803 c_finish_expr_stmt (loc
, NULL_TREE
);
4805 else if (c_parser_next_tokens_start_declaration (parser
))
4807 c_parser_declaration_or_fndef (parser
, true, true, true, true, true,
4808 &object_expression
);
4809 parser
->objc_could_be_foreach_context
= false;
4811 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4813 c_parser_consume_token (parser
);
4814 is_foreach_statement
= true;
4815 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4816 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4819 check_for_loop_decls (for_loc
, flag_isoc99
);
4821 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4823 /* __extension__ can start a declaration, but is also an
4824 unary operator that can start an expression. Consume all
4825 but the last of a possible series of __extension__ to
4827 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4828 && (c_parser_peek_2nd_token (parser
)->keyword
4830 c_parser_consume_token (parser
);
4831 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4834 ext
= disable_extension_diagnostics ();
4835 c_parser_consume_token (parser
);
4836 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4837 true, &object_expression
);
4838 parser
->objc_could_be_foreach_context
= false;
4840 restore_extension_diagnostics (ext
);
4841 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4843 c_parser_consume_token (parser
);
4844 is_foreach_statement
= true;
4845 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4846 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4849 check_for_loop_decls (for_loc
, flag_isoc99
);
4858 tree init_expression
;
4859 init_expression
= c_parser_expression (parser
).value
;
4860 parser
->objc_could_be_foreach_context
= false;
4861 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4863 c_parser_consume_token (parser
);
4864 is_foreach_statement
= true;
4865 if (! lvalue_p (init_expression
))
4866 c_parser_error (parser
, "invalid iterating variable in fast enumeration");
4867 object_expression
= c_fully_fold (init_expression
, false, NULL
);
4871 c_finish_expr_stmt (loc
, init_expression
);
4872 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4876 /* Parse the loop condition. In the case of a foreach
4877 statement, there is no loop condition. */
4878 gcc_assert (!parser
->objc_could_be_foreach_context
);
4879 if (!is_foreach_statement
)
4881 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4883 c_parser_consume_token (parser
);
4888 cond
= c_parser_condition (parser
);
4889 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4892 /* Parse the increment expression (the third expression in a
4893 for-statement). In the case of a foreach-statement, this is
4894 the expression that follows the 'in'. */
4895 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4897 if (is_foreach_statement
)
4899 c_parser_error (parser
, "missing collection in fast enumeration");
4900 collection_expression
= error_mark_node
;
4903 incr
= c_process_expr_stmt (loc
, NULL_TREE
);
4907 if (is_foreach_statement
)
4908 collection_expression
= c_fully_fold (c_parser_expression (parser
).value
,
4911 incr
= c_process_expr_stmt (loc
, c_parser_expression (parser
).value
);
4913 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4915 save_break
= c_break_label
;
4916 c_break_label
= NULL_TREE
;
4917 save_cont
= c_cont_label
;
4918 c_cont_label
= NULL_TREE
;
4919 body
= c_parser_c99_block_statement (parser
);
4920 if (is_foreach_statement
)
4921 objc_finish_foreach_loop (loc
, object_expression
, collection_expression
, body
, c_break_label
, c_cont_label
);
4923 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4924 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
|| c_dialect_objc ()));
4925 c_break_label
= save_break
;
4926 c_cont_label
= save_cont
;
4929 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4930 statement with inputs, outputs, clobbers, and volatile tag
4934 asm type-qualifier[opt] ( asm-argument ) ;
4935 asm type-qualifier[opt] goto ( asm-goto-argument ) ;
4939 asm-string-literal : asm-operands[opt]
4940 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4941 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
4944 asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
4947 Qualifiers other than volatile are accepted in the syntax but
4951 c_parser_asm_statement (c_parser
*parser
)
4953 tree quals
, str
, outputs
, inputs
, clobbers
, labels
, ret
;
4954 bool simple
, is_goto
;
4955 location_t asm_loc
= c_parser_peek_token (parser
)->location
;
4956 int section
, nsections
;
4958 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4959 c_parser_consume_token (parser
);
4960 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4962 quals
= c_parser_peek_token (parser
)->value
;
4963 c_parser_consume_token (parser
);
4965 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4966 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4968 warning_at (c_parser_peek_token (parser
)->location
,
4970 "%E qualifier ignored on asm",
4971 c_parser_peek_token (parser
)->value
);
4973 c_parser_consume_token (parser
);
4979 if (c_parser_next_token_is_keyword (parser
, RID_GOTO
))
4981 c_parser_consume_token (parser
);
4985 /* ??? Follow the C++ parser rather than using the
4986 lex_untranslated_string kludge. */
4987 parser
->lex_untranslated_string
= true;
4990 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4993 str
= c_parser_asm_string_literal (parser
);
4994 if (str
== NULL_TREE
)
4995 goto error_close_paren
;
4998 outputs
= NULL_TREE
;
5000 clobbers
= NULL_TREE
;
5003 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5006 /* Parse each colon-delimited section of operands. */
5007 nsections
= 3 + is_goto
;
5008 for (section
= 0; section
< nsections
; ++section
)
5010 if (!c_parser_require (parser
, CPP_COLON
,
5013 : "expected %<:%> or %<)%>"))
5014 goto error_close_paren
;
5016 /* Once past any colon, we're no longer a simple asm. */
5019 if ((!c_parser_next_token_is (parser
, CPP_COLON
)
5020 && !c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5025 /* For asm goto, we don't allow output operands, but reserve
5026 the slot for a future extension that does allow them. */
5028 outputs
= c_parser_asm_operands (parser
, false);
5031 inputs
= c_parser_asm_operands (parser
, true);
5034 clobbers
= c_parser_asm_clobbers (parser
);
5037 labels
= c_parser_asm_goto_operands (parser
);
5043 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5048 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5050 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5054 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
5055 c_parser_skip_to_end_of_block_or_statement (parser
);
5057 ret
= build_asm_stmt (quals
, build_asm_expr (asm_loc
, str
, outputs
, inputs
,
5058 clobbers
, labels
, simple
));
5061 parser
->lex_untranslated_string
= false;
5065 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5069 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
5070 not outputs), apply the default conversion of functions and arrays
5075 asm-operands , asm-operand
5078 asm-string-literal ( expression )
5079 [ identifier ] asm-string-literal ( expression )
5083 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
5085 tree list
= NULL_TREE
;
5091 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
5093 c_parser_consume_token (parser
);
5094 if (c_parser_next_token_is (parser
, CPP_NAME
))
5096 tree id
= c_parser_peek_token (parser
)->value
;
5097 c_parser_consume_token (parser
);
5098 name
= build_string (IDENTIFIER_LENGTH (id
),
5099 IDENTIFIER_POINTER (id
));
5103 c_parser_error (parser
, "expected identifier");
5104 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
5107 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5112 str
= c_parser_asm_string_literal (parser
);
5113 if (str
== NULL_TREE
)
5115 parser
->lex_untranslated_string
= false;
5116 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5118 parser
->lex_untranslated_string
= true;
5121 loc
= c_parser_peek_token (parser
)->location
;
5122 expr
= c_parser_expression (parser
);
5123 mark_exp_read (expr
.value
);
5125 expr
= default_function_array_conversion (loc
, expr
);
5126 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5127 parser
->lex_untranslated_string
= true;
5128 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5130 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5133 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
5135 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5136 c_parser_consume_token (parser
);
5143 /* Parse asm clobbers, a GNU extension.
5147 asm-clobbers , asm-string-literal
5151 c_parser_asm_clobbers (c_parser
*parser
)
5153 tree list
= NULL_TREE
;
5156 tree str
= c_parser_asm_string_literal (parser
);
5158 list
= tree_cons (NULL_TREE
, str
, list
);
5161 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5162 c_parser_consume_token (parser
);
5169 /* Parse asm goto labels, a GNU extension.
5173 asm-goto-operands , identifier
5177 c_parser_asm_goto_operands (c_parser
*parser
)
5179 tree list
= NULL_TREE
;
5184 if (c_parser_next_token_is (parser
, CPP_NAME
))
5186 c_token
*tok
= c_parser_peek_token (parser
);
5188 label
= lookup_label_for_goto (tok
->location
, name
);
5189 c_parser_consume_token (parser
);
5190 TREE_USED (label
) = 1;
5194 c_parser_error (parser
, "expected identifier");
5198 name
= build_string (IDENTIFIER_LENGTH (name
),
5199 IDENTIFIER_POINTER (name
));
5200 list
= tree_cons (name
, label
, list
);
5201 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5202 c_parser_consume_token (parser
);
5204 return nreverse (list
);
5208 /* Parse an expression other than a compound expression; that is, an
5209 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
5210 NULL then it is an Objective-C message expression which is the
5211 primary-expression starting the expression as an initializer.
5213 assignment-expression:
5214 conditional-expression
5215 unary-expression assignment-operator assignment-expression
5217 assignment-operator: one of
5218 = *= /= %= += -= <<= >>= &= ^= |=
5220 In GNU C we accept any conditional expression on the LHS and
5221 diagnose the invalid lvalue rather than producing a syntax
5224 static struct c_expr
5225 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
5227 struct c_expr lhs
, rhs
, ret
;
5228 enum tree_code code
;
5229 location_t op_location
, exp_location
;
5230 gcc_assert (!after
|| c_dialect_objc ());
5231 lhs
= c_parser_conditional_expression (parser
, after
);
5232 op_location
= c_parser_peek_token (parser
)->location
;
5233 switch (c_parser_peek_token (parser
)->type
)
5242 code
= TRUNC_DIV_EXPR
;
5245 code
= TRUNC_MOD_EXPR
;
5260 code
= BIT_AND_EXPR
;
5263 code
= BIT_XOR_EXPR
;
5266 code
= BIT_IOR_EXPR
;
5271 c_parser_consume_token (parser
);
5272 exp_location
= c_parser_peek_token (parser
)->location
;
5273 rhs
= c_parser_expr_no_commas (parser
, NULL
);
5274 rhs
= default_function_array_read_conversion (exp_location
, rhs
);
5275 ret
.value
= build_modify_expr (op_location
, lhs
.value
, lhs
.original_type
,
5276 code
, exp_location
, rhs
.value
,
5278 if (code
== NOP_EXPR
)
5279 ret
.original_code
= MODIFY_EXPR
;
5282 TREE_NO_WARNING (ret
.value
) = 1;
5283 ret
.original_code
= ERROR_MARK
;
5285 ret
.original_type
= NULL
;
5289 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
5290 is not NULL then it is an Objective-C message expression which is
5291 the primary-expression starting the expression as an initializer.
5293 conditional-expression:
5294 logical-OR-expression
5295 logical-OR-expression ? expression : conditional-expression
5299 conditional-expression:
5300 logical-OR-expression ? : conditional-expression
5303 static struct c_expr
5304 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
5306 struct c_expr cond
, exp1
, exp2
, ret
;
5307 location_t cond_loc
, colon_loc
, middle_loc
;
5309 gcc_assert (!after
|| c_dialect_objc ());
5311 cond
= c_parser_binary_expression (parser
, after
);
5313 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
5315 cond_loc
= c_parser_peek_token (parser
)->location
;
5316 cond
= default_function_array_read_conversion (cond_loc
, cond
);
5317 c_parser_consume_token (parser
);
5318 if (c_parser_next_token_is (parser
, CPP_COLON
))
5320 tree eptype
= NULL_TREE
;
5322 middle_loc
= c_parser_peek_token (parser
)->location
;
5323 pedwarn (middle_loc
, OPT_pedantic
,
5324 "ISO C forbids omitting the middle term of a ?: expression");
5325 warn_for_omitted_condop (middle_loc
, cond
.value
);
5326 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
5328 eptype
= TREE_TYPE (cond
.value
);
5329 cond
.value
= TREE_OPERAND (cond
.value
, 0);
5331 /* Make sure first operand is calculated only once. */
5332 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
5334 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
5335 exp1
.original_type
= NULL
;
5336 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
5337 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_true_node
;
5342 = c_objc_common_truthvalue_conversion
5343 (cond_loc
, default_conversion (cond
.value
));
5344 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_false_node
;
5345 exp1
= c_parser_expression_conv (parser
);
5346 mark_exp_read (exp1
.value
);
5347 c_inhibit_evaluation_warnings
+=
5348 ((cond
.value
== truthvalue_true_node
)
5349 - (cond
.value
== truthvalue_false_node
));
5352 colon_loc
= c_parser_peek_token (parser
)->location
;
5353 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
5355 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5356 ret
.value
= error_mark_node
;
5357 ret
.original_code
= ERROR_MARK
;
5358 ret
.original_type
= NULL
;
5362 location_t exp2_loc
= c_parser_peek_token (parser
)->location
;
5363 exp2
= c_parser_conditional_expression (parser
, NULL
);
5364 exp2
= default_function_array_read_conversion (exp2_loc
, exp2
);
5366 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5367 ret
.value
= build_conditional_expr (colon_loc
, cond
.value
,
5368 cond
.original_code
== C_MAYBE_CONST_EXPR
,
5369 exp1
.value
, exp1
.original_type
,
5370 exp2
.value
, exp2
.original_type
);
5371 ret
.original_code
= ERROR_MARK
;
5372 if (exp1
.value
== error_mark_node
|| exp2
.value
== error_mark_node
)
5373 ret
.original_type
= NULL
;
5378 /* If both sides are enum type, the default conversion will have
5379 made the type of the result be an integer type. We want to
5380 remember the enum types we started with. */
5381 t1
= exp1
.original_type
? exp1
.original_type
: TREE_TYPE (exp1
.value
);
5382 t2
= exp2
.original_type
? exp2
.original_type
: TREE_TYPE (exp2
.value
);
5383 ret
.original_type
= ((t1
!= error_mark_node
5384 && t2
!= error_mark_node
5385 && (TYPE_MAIN_VARIANT (t1
)
5386 == TYPE_MAIN_VARIANT (t2
)))
5393 /* Parse a binary expression; that is, a logical-OR-expression (C90
5394 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
5395 an Objective-C message expression which is the primary-expression
5396 starting the expression as an initializer.
5398 multiplicative-expression:
5400 multiplicative-expression * cast-expression
5401 multiplicative-expression / cast-expression
5402 multiplicative-expression % cast-expression
5404 additive-expression:
5405 multiplicative-expression
5406 additive-expression + multiplicative-expression
5407 additive-expression - multiplicative-expression
5411 shift-expression << additive-expression
5412 shift-expression >> additive-expression
5414 relational-expression:
5416 relational-expression < shift-expression
5417 relational-expression > shift-expression
5418 relational-expression <= shift-expression
5419 relational-expression >= shift-expression
5421 equality-expression:
5422 relational-expression
5423 equality-expression == relational-expression
5424 equality-expression != relational-expression
5428 AND-expression & equality-expression
5430 exclusive-OR-expression:
5432 exclusive-OR-expression ^ AND-expression
5434 inclusive-OR-expression:
5435 exclusive-OR-expression
5436 inclusive-OR-expression | exclusive-OR-expression
5438 logical-AND-expression:
5439 inclusive-OR-expression
5440 logical-AND-expression && inclusive-OR-expression
5442 logical-OR-expression:
5443 logical-AND-expression
5444 logical-OR-expression || logical-AND-expression
5447 static struct c_expr
5448 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
5450 /* A binary expression is parsed using operator-precedence parsing,
5451 with the operands being cast expressions. All the binary
5452 operators are left-associative. Thus a binary expression is of
5455 E0 op1 E1 op2 E2 ...
5457 which we represent on a stack. On the stack, the precedence
5458 levels are strictly increasing. When a new operator is
5459 encountered of higher precedence than that at the top of the
5460 stack, it is pushed; its LHS is the top expression, and its RHS
5461 is everything parsed until it is popped. When a new operator is
5462 encountered with precedence less than or equal to that at the top
5463 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
5464 by the result of the operation until the operator at the top of
5465 the stack has lower precedence than the new operator or there is
5466 only one element on the stack; then the top expression is the LHS
5467 of the new operator. In the case of logical AND and OR
5468 expressions, we also need to adjust c_inhibit_evaluation_warnings
5469 as appropriate when the operators are pushed and popped. */
5471 /* The precedence levels, where 0 is a dummy lowest level used for
5472 the bottom of the stack. */
5488 /* The expression at this stack level. */
5490 /* The precedence of the operator on its left, PREC_NONE at the
5491 bottom of the stack. */
5493 /* The operation on its left. */
5495 /* The source location of this operation. */
5499 /* Location of the binary operator. */
5500 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
5503 switch (stack[sp].op) \
5505 case TRUTH_ANDIF_EXPR: \
5506 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5507 == truthvalue_false_node); \
5509 case TRUTH_ORIF_EXPR: \
5510 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5511 == truthvalue_true_node); \
5516 stack[sp - 1].expr \
5517 = default_function_array_read_conversion (stack[sp - 1].loc, \
5518 stack[sp - 1].expr); \
5520 = default_function_array_read_conversion (stack[sp].loc, \
5522 stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \
5524 stack[sp - 1].expr, \
5528 gcc_assert (!after
|| c_dialect_objc ());
5529 stack
[0].loc
= c_parser_peek_token (parser
)->location
;
5530 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
5531 stack
[0].prec
= PREC_NONE
;
5536 enum tree_code ocode
;
5539 switch (c_parser_peek_token (parser
)->type
)
5547 ocode
= TRUNC_DIV_EXPR
;
5551 ocode
= TRUNC_MOD_EXPR
;
5563 ocode
= LSHIFT_EXPR
;
5567 ocode
= RSHIFT_EXPR
;
5581 case CPP_GREATER_EQ
:
5594 oprec
= PREC_BITAND
;
5595 ocode
= BIT_AND_EXPR
;
5598 oprec
= PREC_BITXOR
;
5599 ocode
= BIT_XOR_EXPR
;
5603 ocode
= BIT_IOR_EXPR
;
5606 oprec
= PREC_LOGAND
;
5607 ocode
= TRUTH_ANDIF_EXPR
;
5611 ocode
= TRUTH_ORIF_EXPR
;
5614 /* Not a binary operator, so end of the binary
5618 binary_loc
= c_parser_peek_token (parser
)->location
;
5619 c_parser_consume_token (parser
);
5620 while (oprec
<= stack
[sp
].prec
)
5624 case TRUTH_ANDIF_EXPR
:
5626 = default_function_array_read_conversion (stack
[sp
].loc
,
5628 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5629 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5630 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5631 == truthvalue_false_node
);
5633 case TRUTH_ORIF_EXPR
:
5635 = default_function_array_read_conversion (stack
[sp
].loc
,
5637 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5638 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5639 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5640 == truthvalue_true_node
);
5646 stack
[sp
].loc
= binary_loc
;
5647 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
5648 stack
[sp
].prec
= oprec
;
5649 stack
[sp
].op
= ocode
;
5650 stack
[sp
].loc
= binary_loc
;
5655 return stack
[0].expr
;
5659 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
5660 NULL then it is an Objective-C message expression which is the
5661 primary-expression starting the expression as an initializer.
5665 ( type-name ) unary-expression
5668 static struct c_expr
5669 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
5671 location_t cast_loc
= c_parser_peek_token (parser
)->location
;
5672 gcc_assert (!after
|| c_dialect_objc ());
5674 return c_parser_postfix_expression_after_primary (parser
,
5676 /* If the expression begins with a parenthesized type name, it may
5677 be either a cast or a compound literal; we need to see whether
5678 the next character is '{' to tell the difference. If not, it is
5679 an unary expression. Full detection of unknown typenames here
5680 would require a 3-token lookahead. */
5681 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5682 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5684 struct c_type_name
*type_name
;
5687 c_parser_consume_token (parser
);
5688 type_name
= c_parser_type_name (parser
);
5689 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5690 if (type_name
== NULL
)
5692 ret
.value
= error_mark_node
;
5693 ret
.original_code
= ERROR_MARK
;
5694 ret
.original_type
= NULL
;
5698 /* Save casted types in the function's used types hash table. */
5699 used_types_insert (type_name
->specs
->type
);
5701 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5702 return c_parser_postfix_expression_after_paren_type (parser
, type_name
,
5705 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
5706 expr
= c_parser_cast_expression (parser
, NULL
);
5707 expr
= default_function_array_read_conversion (expr_loc
, expr
);
5709 ret
.value
= c_cast_expr (cast_loc
, type_name
, expr
.value
);
5710 ret
.original_code
= ERROR_MARK
;
5711 ret
.original_type
= NULL
;
5715 return c_parser_unary_expression (parser
);
5718 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
5724 unary-operator cast-expression
5725 sizeof unary-expression
5726 sizeof ( type-name )
5728 unary-operator: one of
5734 __alignof__ unary-expression
5735 __alignof__ ( type-name )
5738 unary-operator: one of
5739 __extension__ __real__ __imag__
5741 In addition, the GNU syntax treats ++ and -- as unary operators, so
5742 they may be applied to cast expressions with errors for non-lvalues
5745 static struct c_expr
5746 c_parser_unary_expression (c_parser
*parser
)
5749 struct c_expr ret
, op
;
5750 location_t op_loc
= c_parser_peek_token (parser
)->location
;
5752 ret
.original_code
= ERROR_MARK
;
5753 ret
.original_type
= NULL
;
5754 switch (c_parser_peek_token (parser
)->type
)
5757 c_parser_consume_token (parser
);
5758 exp_loc
= c_parser_peek_token (parser
)->location
;
5759 op
= c_parser_cast_expression (parser
, NULL
);
5760 op
= default_function_array_read_conversion (exp_loc
, op
);
5761 return parser_build_unary_op (op_loc
, PREINCREMENT_EXPR
, op
);
5762 case CPP_MINUS_MINUS
:
5763 c_parser_consume_token (parser
);
5764 exp_loc
= c_parser_peek_token (parser
)->location
;
5765 op
= c_parser_cast_expression (parser
, NULL
);
5766 op
= default_function_array_read_conversion (exp_loc
, op
);
5767 return parser_build_unary_op (op_loc
, PREDECREMENT_EXPR
, op
);
5769 c_parser_consume_token (parser
);
5770 op
= c_parser_cast_expression (parser
, NULL
);
5771 mark_exp_read (op
.value
);
5772 return parser_build_unary_op (op_loc
, ADDR_EXPR
, op
);
5774 c_parser_consume_token (parser
);
5775 exp_loc
= c_parser_peek_token (parser
)->location
;
5776 op
= c_parser_cast_expression (parser
, NULL
);
5777 op
= default_function_array_read_conversion (exp_loc
, op
);
5778 ret
.value
= build_indirect_ref (op_loc
, op
.value
, RO_UNARY_STAR
);
5781 if (!c_dialect_objc () && !in_system_header
)
5784 "traditional C rejects the unary plus operator");
5785 c_parser_consume_token (parser
);
5786 exp_loc
= c_parser_peek_token (parser
)->location
;
5787 op
= c_parser_cast_expression (parser
, NULL
);
5788 op
= default_function_array_read_conversion (exp_loc
, op
);
5789 return parser_build_unary_op (op_loc
, CONVERT_EXPR
, op
);
5791 c_parser_consume_token (parser
);
5792 exp_loc
= c_parser_peek_token (parser
)->location
;
5793 op
= c_parser_cast_expression (parser
, NULL
);
5794 op
= default_function_array_read_conversion (exp_loc
, op
);
5795 return parser_build_unary_op (op_loc
, NEGATE_EXPR
, op
);
5797 c_parser_consume_token (parser
);
5798 exp_loc
= c_parser_peek_token (parser
)->location
;
5799 op
= c_parser_cast_expression (parser
, NULL
);
5800 op
= default_function_array_read_conversion (exp_loc
, op
);
5801 return parser_build_unary_op (op_loc
, BIT_NOT_EXPR
, op
);
5803 c_parser_consume_token (parser
);
5804 exp_loc
= c_parser_peek_token (parser
)->location
;
5805 op
= c_parser_cast_expression (parser
, NULL
);
5806 op
= default_function_array_read_conversion (exp_loc
, op
);
5807 return parser_build_unary_op (op_loc
, TRUTH_NOT_EXPR
, op
);
5809 /* Refer to the address of a label as a pointer. */
5810 c_parser_consume_token (parser
);
5811 if (c_parser_next_token_is (parser
, CPP_NAME
))
5813 ret
.value
= finish_label_address_expr
5814 (c_parser_peek_token (parser
)->value
, op_loc
);
5815 c_parser_consume_token (parser
);
5819 c_parser_error (parser
, "expected identifier");
5820 ret
.value
= error_mark_node
;
5824 switch (c_parser_peek_token (parser
)->keyword
)
5827 return c_parser_sizeof_expression (parser
);
5829 return c_parser_alignof_expression (parser
);
5831 c_parser_consume_token (parser
);
5832 ext
= disable_extension_diagnostics ();
5833 ret
= c_parser_cast_expression (parser
, NULL
);
5834 restore_extension_diagnostics (ext
);
5837 c_parser_consume_token (parser
);
5838 exp_loc
= c_parser_peek_token (parser
)->location
;
5839 op
= c_parser_cast_expression (parser
, NULL
);
5840 op
= default_function_array_conversion (exp_loc
, op
);
5841 return parser_build_unary_op (op_loc
, REALPART_EXPR
, op
);
5843 c_parser_consume_token (parser
);
5844 exp_loc
= c_parser_peek_token (parser
)->location
;
5845 op
= c_parser_cast_expression (parser
, NULL
);
5846 op
= default_function_array_conversion (exp_loc
, op
);
5847 return parser_build_unary_op (op_loc
, IMAGPART_EXPR
, op
);
5849 return c_parser_postfix_expression (parser
);
5852 return c_parser_postfix_expression (parser
);
5856 /* Parse a sizeof expression. */
5858 static struct c_expr
5859 c_parser_sizeof_expression (c_parser
*parser
)
5862 location_t expr_loc
;
5863 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
5864 c_parser_consume_token (parser
);
5865 c_inhibit_evaluation_warnings
++;
5867 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5868 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5870 /* Either sizeof ( type-name ) or sizeof unary-expression
5871 starting with a compound literal. */
5872 struct c_type_name
*type_name
;
5873 c_parser_consume_token (parser
);
5874 expr_loc
= c_parser_peek_token (parser
)->location
;
5875 type_name
= c_parser_type_name (parser
);
5876 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5877 if (type_name
== NULL
)
5880 c_inhibit_evaluation_warnings
--;
5882 ret
.value
= error_mark_node
;
5883 ret
.original_code
= ERROR_MARK
;
5884 ret
.original_type
= NULL
;
5887 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5889 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5894 /* sizeof ( type-name ). */
5895 c_inhibit_evaluation_warnings
--;
5897 return c_expr_sizeof_type (expr_loc
, type_name
);
5901 expr_loc
= c_parser_peek_token (parser
)->location
;
5902 expr
= c_parser_unary_expression (parser
);
5904 c_inhibit_evaluation_warnings
--;
5906 mark_exp_read (expr
.value
);
5907 if (TREE_CODE (expr
.value
) == COMPONENT_REF
5908 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
5909 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
5910 return c_expr_sizeof_expr (expr_loc
, expr
);
5914 /* Parse an alignof expression. */
5916 static struct c_expr
5917 c_parser_alignof_expression (c_parser
*parser
)
5920 location_t loc
= c_parser_peek_token (parser
)->location
;
5921 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
5922 c_parser_consume_token (parser
);
5923 c_inhibit_evaluation_warnings
++;
5925 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5926 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5928 /* Either __alignof__ ( type-name ) or __alignof__
5929 unary-expression starting with a compound literal. */
5931 struct c_type_name
*type_name
;
5933 c_parser_consume_token (parser
);
5934 loc
= c_parser_peek_token (parser
)->location
;
5935 type_name
= c_parser_type_name (parser
);
5936 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5937 if (type_name
== NULL
)
5940 c_inhibit_evaluation_warnings
--;
5942 ret
.value
= error_mark_node
;
5943 ret
.original_code
= ERROR_MARK
;
5944 ret
.original_type
= NULL
;
5947 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5949 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5954 /* alignof ( type-name ). */
5955 c_inhibit_evaluation_warnings
--;
5957 ret
.value
= c_alignof (loc
, groktypename (type_name
, NULL
, NULL
));
5958 ret
.original_code
= ERROR_MARK
;
5959 ret
.original_type
= NULL
;
5965 expr
= c_parser_unary_expression (parser
);
5967 mark_exp_read (expr
.value
);
5968 c_inhibit_evaluation_warnings
--;
5970 ret
.value
= c_alignof_expr (loc
, expr
.value
);
5971 ret
.original_code
= ERROR_MARK
;
5972 ret
.original_type
= NULL
;
5977 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5981 postfix-expression [ expression ]
5982 postfix-expression ( argument-expression-list[opt] )
5983 postfix-expression . identifier
5984 postfix-expression -> identifier
5985 postfix-expression ++
5986 postfix-expression --
5987 ( type-name ) { initializer-list }
5988 ( type-name ) { initializer-list , }
5990 argument-expression-list:
5992 argument-expression-list , argument-expression
6004 (treated as a keyword in GNU C)
6007 ( compound-statement )
6008 __builtin_va_arg ( assignment-expression , type-name )
6009 __builtin_offsetof ( type-name , offsetof-member-designator )
6010 __builtin_choose_expr ( assignment-expression ,
6011 assignment-expression ,
6012 assignment-expression )
6013 __builtin_types_compatible_p ( type-name , type-name )
6015 offsetof-member-designator:
6017 offsetof-member-designator . identifier
6018 offsetof-member-designator [ expression ]
6023 [ objc-receiver objc-message-args ]
6024 @selector ( objc-selector-arg )
6025 @protocol ( identifier )
6026 @encode ( type-name )
6028 Classname . identifier
6031 static struct c_expr
6032 c_parser_postfix_expression (c_parser
*parser
)
6034 struct c_expr expr
, e1
, e2
, e3
;
6035 struct c_type_name
*t1
, *t2
;
6036 location_t loc
= c_parser_peek_token (parser
)->location
;;
6037 expr
.original_code
= ERROR_MARK
;
6038 expr
.original_type
= NULL
;
6039 switch (c_parser_peek_token (parser
)->type
)
6042 expr
.value
= c_parser_peek_token (parser
)->value
;
6043 loc
= c_parser_peek_token (parser
)->location
;
6044 c_parser_consume_token (parser
);
6045 if (TREE_CODE (expr
.value
) == FIXED_CST
6046 && !targetm
.fixed_point_supported_p ())
6048 error_at (loc
, "fixed-point types not supported for this target");
6049 expr
.value
= error_mark_node
;
6056 expr
.value
= c_parser_peek_token (parser
)->value
;
6057 c_parser_consume_token (parser
);
6063 case CPP_UTF8STRING
:
6064 expr
.value
= c_parser_peek_token (parser
)->value
;
6065 expr
.original_code
= STRING_CST
;
6066 c_parser_consume_token (parser
);
6068 case CPP_OBJC_STRING
:
6069 gcc_assert (c_dialect_objc ());
6071 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
6072 c_parser_consume_token (parser
);
6075 switch (c_parser_peek_token (parser
)->id_kind
)
6079 tree id
= c_parser_peek_token (parser
)->value
;
6080 c_parser_consume_token (parser
);
6081 expr
.value
= build_external_ref (loc
, id
,
6082 (c_parser_peek_token (parser
)->type
6084 &expr
.original_type
);
6087 case C_ID_CLASSNAME
:
6089 /* Here we parse the Objective-C 2.0 Class.name dot
6091 tree class_name
= c_parser_peek_token (parser
)->value
;
6093 c_parser_consume_token (parser
);
6094 gcc_assert (c_dialect_objc ());
6095 if (!c_parser_require (parser
, CPP_DOT
, "expected %<.%>"))
6097 expr
.value
= error_mark_node
;
6100 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6102 c_parser_error (parser
, "expected identifier");
6103 expr
.value
= error_mark_node
;
6106 component
= c_parser_peek_token (parser
)->value
;
6107 c_parser_consume_token (parser
);
6108 expr
.value
= objc_build_class_component_ref (class_name
,
6113 c_parser_error (parser
, "expected expression");
6114 expr
.value
= error_mark_node
;
6118 case CPP_OPEN_PAREN
:
6119 /* A parenthesized expression, statement expression or compound
6121 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
6123 /* A statement expression. */
6125 location_t brace_loc
;
6126 c_parser_consume_token (parser
);
6127 brace_loc
= c_parser_peek_token (parser
)->location
;
6128 c_parser_consume_token (parser
);
6129 if (cur_stmt_list
== NULL
)
6131 error_at (loc
, "braced-group within expression allowed "
6132 "only inside a function");
6133 parser
->error
= true;
6134 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
6135 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6136 expr
.value
= error_mark_node
;
6139 stmt
= c_begin_stmt_expr ();
6140 c_parser_compound_statement_nostart (parser
);
6141 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6143 pedwarn (loc
, OPT_pedantic
,
6144 "ISO C forbids braced-groups within expressions");
6145 expr
.value
= c_finish_stmt_expr (brace_loc
, stmt
);
6146 mark_exp_read (expr
.value
);
6148 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
6150 /* A compound literal. ??? Can we actually get here rather
6151 than going directly to
6152 c_parser_postfix_expression_after_paren_type from
6155 struct c_type_name
*type_name
;
6156 c_parser_consume_token (parser
);
6157 loc
= c_parser_peek_token (parser
)->location
;
6158 type_name
= c_parser_type_name (parser
);
6159 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6161 if (type_name
== NULL
)
6163 expr
.value
= error_mark_node
;
6166 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6172 /* A parenthesized expression. */
6173 c_parser_consume_token (parser
);
6174 expr
= c_parser_expression (parser
);
6175 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
6176 TREE_NO_WARNING (expr
.value
) = 1;
6177 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
6178 expr
.original_code
= ERROR_MARK
;
6179 /* Don't change EXPR.ORIGINAL_TYPE. */
6180 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6185 switch (c_parser_peek_token (parser
)->keyword
)
6187 case RID_FUNCTION_NAME
:
6188 case RID_PRETTY_FUNCTION_NAME
:
6189 case RID_C99_FUNCTION_NAME
:
6190 expr
.value
= fname_decl (loc
,
6191 c_parser_peek_token (parser
)->keyword
,
6192 c_parser_peek_token (parser
)->value
);
6193 c_parser_consume_token (parser
);
6196 c_parser_consume_token (parser
);
6197 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6199 expr
.value
= error_mark_node
;
6202 e1
= c_parser_expr_no_commas (parser
, NULL
);
6203 mark_exp_read (e1
.value
);
6204 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
6205 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6207 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6208 expr
.value
= error_mark_node
;
6211 loc
= c_parser_peek_token (parser
)->location
;
6212 t1
= c_parser_type_name (parser
);
6213 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6217 expr
.value
= error_mark_node
;
6221 tree type_expr
= NULL_TREE
;
6222 expr
.value
= c_build_va_arg (loc
, e1
.value
,
6223 groktypename (t1
, &type_expr
, NULL
));
6226 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
6227 TREE_TYPE (expr
.value
), type_expr
,
6229 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
6234 c_parser_consume_token (parser
);
6235 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6237 expr
.value
= error_mark_node
;
6240 t1
= c_parser_type_name (parser
);
6242 parser
->error
= true;
6243 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6244 gcc_assert (parser
->error
);
6247 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6248 expr
.value
= error_mark_node
;
6253 tree type
= groktypename (t1
, NULL
, NULL
);
6255 if (type
== error_mark_node
)
6256 offsetof_ref
= error_mark_node
;
6259 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
6260 SET_EXPR_LOCATION (offsetof_ref
, loc
);
6262 /* Parse the second argument to __builtin_offsetof. We
6263 must have one identifier, and beyond that we want to
6264 accept sub structure and sub array references. */
6265 if (c_parser_next_token_is (parser
, CPP_NAME
))
6267 offsetof_ref
= build_component_ref
6268 (loc
, offsetof_ref
, c_parser_peek_token (parser
)->value
);
6269 c_parser_consume_token (parser
);
6270 while (c_parser_next_token_is (parser
, CPP_DOT
)
6271 || c_parser_next_token_is (parser
,
6273 || c_parser_next_token_is (parser
,
6276 if (c_parser_next_token_is (parser
, CPP_DEREF
))
6278 loc
= c_parser_peek_token (parser
)->location
;
6279 offsetof_ref
= build_array_ref (loc
,
6284 else if (c_parser_next_token_is (parser
, CPP_DOT
))
6287 c_parser_consume_token (parser
);
6288 if (c_parser_next_token_is_not (parser
,
6291 c_parser_error (parser
, "expected identifier");
6294 offsetof_ref
= build_component_ref
6296 c_parser_peek_token (parser
)->value
);
6297 c_parser_consume_token (parser
);
6302 loc
= c_parser_peek_token (parser
)->location
;
6303 c_parser_consume_token (parser
);
6304 idx
= c_parser_expression (parser
).value
;
6305 idx
= c_fully_fold (idx
, false, NULL
);
6306 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6308 offsetof_ref
= build_array_ref (loc
, offsetof_ref
, idx
);
6313 c_parser_error (parser
, "expected identifier");
6314 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6316 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
6319 case RID_CHOOSE_EXPR
:
6320 c_parser_consume_token (parser
);
6321 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6323 expr
.value
= error_mark_node
;
6326 loc
= c_parser_peek_token (parser
)->location
;
6327 e1
= c_parser_expr_no_commas (parser
, NULL
);
6328 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6330 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6331 expr
.value
= error_mark_node
;
6334 e2
= c_parser_expr_no_commas (parser
, NULL
);
6335 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6337 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6338 expr
.value
= error_mark_node
;
6341 e3
= c_parser_expr_no_commas (parser
, NULL
);
6342 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6348 mark_exp_read (e2
.value
);
6349 mark_exp_read (e3
.value
);
6350 if (TREE_CODE (c
) != INTEGER_CST
6351 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
6353 "first argument to %<__builtin_choose_expr%> not"
6355 constant_expression_warning (c
);
6356 expr
= integer_zerop (c
) ? e3
: e2
;
6359 case RID_TYPES_COMPATIBLE_P
:
6360 c_parser_consume_token (parser
);
6361 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6363 expr
.value
= error_mark_node
;
6366 t1
= c_parser_type_name (parser
);
6369 expr
.value
= error_mark_node
;
6372 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6374 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6375 expr
.value
= error_mark_node
;
6378 t2
= c_parser_type_name (parser
);
6381 expr
.value
= error_mark_node
;
6384 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6389 e1
= TYPE_MAIN_VARIANT (groktypename (t1
, NULL
, NULL
));
6390 e2
= TYPE_MAIN_VARIANT (groktypename (t2
, NULL
, NULL
));
6393 = comptypes (e1
, e2
) ? integer_one_node
: integer_zero_node
;
6396 case RID_AT_SELECTOR
:
6397 gcc_assert (c_dialect_objc ());
6398 c_parser_consume_token (parser
);
6399 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6401 expr
.value
= error_mark_node
;
6405 tree sel
= c_parser_objc_selector_arg (parser
);
6406 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6408 expr
.value
= objc_build_selector_expr (loc
, sel
);
6411 case RID_AT_PROTOCOL
:
6412 gcc_assert (c_dialect_objc ());
6413 c_parser_consume_token (parser
);
6414 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6416 expr
.value
= error_mark_node
;
6419 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6421 c_parser_error (parser
, "expected identifier");
6422 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6423 expr
.value
= error_mark_node
;
6427 tree id
= c_parser_peek_token (parser
)->value
;
6428 c_parser_consume_token (parser
);
6429 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6431 expr
.value
= objc_build_protocol_expr (id
);
6435 /* Extension to support C-structures in the archiver. */
6436 gcc_assert (c_dialect_objc ());
6437 c_parser_consume_token (parser
);
6438 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6440 expr
.value
= error_mark_node
;
6443 t1
= c_parser_type_name (parser
);
6446 expr
.value
= error_mark_node
;
6447 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6450 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6453 tree type
= groktypename (t1
, NULL
, NULL
);
6454 expr
.value
= objc_build_encode_expr (type
);
6458 c_parser_error (parser
, "expected expression");
6459 expr
.value
= error_mark_node
;
6463 case CPP_OPEN_SQUARE
:
6464 if (c_dialect_objc ())
6466 tree receiver
, args
;
6467 c_parser_consume_token (parser
);
6468 receiver
= c_parser_objc_receiver (parser
);
6469 args
= c_parser_objc_message_args (parser
);
6470 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6472 expr
.value
= objc_build_message_expr (receiver
, args
);
6475 /* Else fall through to report error. */
6477 c_parser_error (parser
, "expected expression");
6478 expr
.value
= error_mark_node
;
6481 return c_parser_postfix_expression_after_primary (parser
, loc
, expr
);
6484 /* Parse a postfix expression after a parenthesized type name: the
6485 brace-enclosed initializer of a compound literal, possibly followed
6486 by some postfix operators. This is separate because it is not
6487 possible to tell until after the type name whether a cast
6488 expression has a cast or a compound literal, or whether the operand
6489 of sizeof is a parenthesized type name or starts with a compound
6490 literal. TYPE_LOC is the location where TYPE_NAME starts--the
6491 location of the first token after the parentheses around the type
6494 static struct c_expr
6495 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
6496 struct c_type_name
*type_name
,
6497 location_t type_loc
)
6503 location_t start_loc
;
6504 tree type_expr
= NULL_TREE
;
6505 bool type_expr_const
= true;
6506 check_compound_literal_type (type_loc
, type_name
);
6507 start_init (NULL_TREE
, NULL
, 0);
6508 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
6509 start_loc
= c_parser_peek_token (parser
)->location
;
6510 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
6512 error_at (type_loc
, "compound literal has variable size");
6513 type
= error_mark_node
;
6515 init
= c_parser_braced_init (parser
, type
, false);
6517 maybe_warn_string_init (type
, init
);
6519 if (type
!= error_mark_node
6520 && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type
))
6521 && current_function_decl
)
6523 error ("compound literal qualified by address-space qualifier");
6524 type
= error_mark_node
;
6528 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
6529 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
6530 ? CONSTRUCTOR_NON_CONST (init
.value
)
6531 : init
.original_code
== C_MAYBE_CONST_EXPR
);
6532 non_const
|= !type_expr_const
;
6533 expr
.value
= build_compound_literal (start_loc
, type
, init
.value
, non_const
);
6534 expr
.original_code
= ERROR_MARK
;
6535 expr
.original_type
= NULL
;
6538 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
6540 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
6541 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
6545 gcc_assert (!non_const
);
6546 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
6547 type_expr
, expr
.value
);
6550 return c_parser_postfix_expression_after_primary (parser
, start_loc
, expr
);
6553 /* Parse a postfix expression after the initial primary or compound
6554 literal; that is, parse a series of postfix operators.
6556 EXPR_LOC is the location of the primary expression. */
6558 static struct c_expr
6559 c_parser_postfix_expression_after_primary (c_parser
*parser
,
6560 location_t expr_loc
,
6563 struct c_expr orig_expr
;
6565 VEC(tree
,gc
) *exprlist
;
6566 VEC(tree
,gc
) *origtypes
;
6569 location_t op_loc
= c_parser_peek_token (parser
)->location
;
6570 switch (c_parser_peek_token (parser
)->type
)
6572 case CPP_OPEN_SQUARE
:
6573 /* Array reference. */
6574 c_parser_consume_token (parser
);
6575 idx
= c_parser_expression (parser
).value
;
6576 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6578 expr
.value
= build_array_ref (op_loc
, expr
.value
, idx
);
6579 expr
.original_code
= ERROR_MARK
;
6580 expr
.original_type
= NULL
;
6582 case CPP_OPEN_PAREN
:
6583 /* Function call. */
6584 c_parser_consume_token (parser
);
6585 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6588 exprlist
= c_parser_expr_list (parser
, true, false, &origtypes
);
6589 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6592 mark_exp_read (expr
.value
);
6593 /* FIXME diagnostics: Ideally we want the FUNCNAME, not the
6594 "(" after the FUNCNAME, which is what we have now. */
6595 expr
.value
= build_function_call_vec (op_loc
, expr
.value
, exprlist
,
6597 expr
.original_code
= ERROR_MARK
;
6598 if (TREE_CODE (expr
.value
) == INTEGER_CST
6599 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
6600 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
6601 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
6602 expr
.original_code
= C_MAYBE_CONST_EXPR
;
6603 expr
.original_type
= NULL
;
6604 if (exprlist
!= NULL
)
6606 release_tree_vector (exprlist
);
6607 release_tree_vector (origtypes
);
6611 /* Structure element reference. */
6612 c_parser_consume_token (parser
);
6613 expr
= default_function_array_conversion (expr_loc
, expr
);
6614 if (c_parser_next_token_is (parser
, CPP_NAME
))
6615 ident
= c_parser_peek_token (parser
)->value
;
6618 c_parser_error (parser
, "expected identifier");
6619 expr
.value
= error_mark_node
;
6620 expr
.original_code
= ERROR_MARK
;
6621 expr
.original_type
= NULL
;
6624 c_parser_consume_token (parser
);
6625 expr
.value
= build_component_ref (op_loc
, expr
.value
, ident
);
6626 expr
.original_code
= ERROR_MARK
;
6627 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6628 expr
.original_type
= NULL
;
6631 /* Remember the original type of a bitfield. */
6632 tree field
= TREE_OPERAND (expr
.value
, 1);
6633 if (TREE_CODE (field
) != FIELD_DECL
)
6634 expr
.original_type
= NULL
;
6636 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6640 /* Structure element reference. */
6641 c_parser_consume_token (parser
);
6642 expr
= default_function_array_conversion (expr_loc
, expr
);
6643 if (c_parser_next_token_is (parser
, CPP_NAME
))
6644 ident
= c_parser_peek_token (parser
)->value
;
6647 c_parser_error (parser
, "expected identifier");
6648 expr
.value
= error_mark_node
;
6649 expr
.original_code
= ERROR_MARK
;
6650 expr
.original_type
= NULL
;
6653 c_parser_consume_token (parser
);
6654 expr
.value
= build_component_ref (op_loc
,
6655 build_indirect_ref (op_loc
,
6659 expr
.original_code
= ERROR_MARK
;
6660 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6661 expr
.original_type
= NULL
;
6664 /* Remember the original type of a bitfield. */
6665 tree field
= TREE_OPERAND (expr
.value
, 1);
6666 if (TREE_CODE (field
) != FIELD_DECL
)
6667 expr
.original_type
= NULL
;
6669 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6673 /* Postincrement. */
6674 c_parser_consume_token (parser
);
6675 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6676 expr
.value
= build_unary_op (op_loc
,
6677 POSTINCREMENT_EXPR
, expr
.value
, 0);
6678 expr
.original_code
= ERROR_MARK
;
6679 expr
.original_type
= NULL
;
6681 case CPP_MINUS_MINUS
:
6682 /* Postdecrement. */
6683 c_parser_consume_token (parser
);
6684 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6685 expr
.value
= build_unary_op (op_loc
,
6686 POSTDECREMENT_EXPR
, expr
.value
, 0);
6687 expr
.original_code
= ERROR_MARK
;
6688 expr
.original_type
= NULL
;
6696 /* Parse an expression (C90 6.3.17, C99 6.5.17).
6699 assignment-expression
6700 expression , assignment-expression
6703 static struct c_expr
6704 c_parser_expression (c_parser
*parser
)
6707 expr
= c_parser_expr_no_commas (parser
, NULL
);
6708 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6712 location_t loc
= c_parser_peek_token (parser
)->location
;
6713 location_t expr_loc
;
6714 c_parser_consume_token (parser
);
6715 expr_loc
= c_parser_peek_token (parser
)->location
;
6716 lhsval
= expr
.value
;
6717 while (TREE_CODE (lhsval
) == COMPOUND_EXPR
)
6718 lhsval
= TREE_OPERAND (lhsval
, 1);
6719 if (DECL_P (lhsval
) || handled_component_p (lhsval
))
6720 mark_exp_read (lhsval
);
6721 next
= c_parser_expr_no_commas (parser
, NULL
);
6722 next
= default_function_array_conversion (expr_loc
, next
);
6723 expr
.value
= build_compound_expr (loc
, expr
.value
, next
.value
);
6724 expr
.original_code
= COMPOUND_EXPR
;
6725 expr
.original_type
= next
.original_type
;
6730 /* Parse an expression and convert functions or arrays to
6733 static struct c_expr
6734 c_parser_expression_conv (c_parser
*parser
)
6737 location_t loc
= c_parser_peek_token (parser
)->location
;
6738 expr
= c_parser_expression (parser
);
6739 expr
= default_function_array_conversion (loc
, expr
);
6743 /* Parse a non-empty list of expressions. If CONVERT_P, convert
6744 functions and arrays to pointers. If FOLD_P, fold the expressions.
6747 assignment-expression
6748 nonempty-expr-list , assignment-expression
6751 static VEC(tree
,gc
) *
6752 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
,
6753 VEC(tree
,gc
) **p_orig_types
)
6756 VEC(tree
,gc
) *orig_types
;
6758 location_t loc
= c_parser_peek_token (parser
)->location
;
6760 ret
= make_tree_vector ();
6761 if (p_orig_types
== NULL
)
6764 orig_types
= make_tree_vector ();
6766 expr
= c_parser_expr_no_commas (parser
, NULL
);
6768 expr
= default_function_array_read_conversion (loc
, expr
);
6770 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6771 VEC_quick_push (tree
, ret
, expr
.value
);
6772 if (orig_types
!= NULL
)
6773 VEC_quick_push (tree
, orig_types
, expr
.original_type
);
6774 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6776 c_parser_consume_token (parser
);
6777 loc
= c_parser_peek_token (parser
)->location
;
6778 expr
= c_parser_expr_no_commas (parser
, NULL
);
6780 expr
= default_function_array_read_conversion (loc
, expr
);
6782 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6783 VEC_safe_push (tree
, gc
, ret
, expr
.value
);
6784 if (orig_types
!= NULL
)
6785 VEC_safe_push (tree
, gc
, orig_types
, expr
.original_type
);
6787 if (orig_types
!= NULL
)
6788 *p_orig_types
= orig_types
;
6792 /* Parse Objective-C-specific constructs. */
6794 /* Parse an objc-class-definition.
6796 objc-class-definition:
6797 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
6798 objc-class-instance-variables[opt] objc-methodprotolist @end
6799 @implementation identifier objc-superclass[opt]
6800 objc-class-instance-variables[opt]
6801 @interface identifier ( identifier ) objc-protocol-refs[opt]
6802 objc-methodprotolist @end
6803 @interface identifier ( ) objc-protocol-refs[opt]
6804 objc-methodprotolist @end
6805 @implementation identifier ( identifier )
6810 "@interface identifier (" must start "@interface identifier (
6811 identifier ) ...": objc-methodprotolist in the first production may
6812 not start with a parenthesized identifier as a declarator of a data
6813 definition with no declaration specifiers if the objc-superclass,
6814 objc-protocol-refs and objc-class-instance-variables are omitted. */
6817 c_parser_objc_class_definition (c_parser
*parser
, tree attributes
)
6822 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
6824 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
6829 c_parser_consume_token (parser
);
6830 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6832 c_parser_error (parser
, "expected identifier");
6835 id1
= c_parser_peek_token (parser
)->value
;
6836 c_parser_consume_token (parser
);
6837 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6839 /* We have a category or class extension. */
6841 tree proto
= NULL_TREE
;
6842 c_parser_consume_token (parser
);
6843 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6845 if (iface_p
&& c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6847 /* We have a class extension. */
6852 c_parser_error (parser
, "expected identifier or %<)%>");
6853 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6859 id2
= c_parser_peek_token (parser
)->value
;
6860 c_parser_consume_token (parser
);
6862 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6865 objc_start_category_implementation (id1
, id2
);
6868 if (c_parser_next_token_is (parser
, CPP_LESS
))
6869 proto
= c_parser_objc_protocol_refs (parser
);
6870 objc_start_category_interface (id1
, id2
, proto
, attributes
);
6871 c_parser_objc_methodprotolist (parser
);
6872 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6873 objc_finish_interface ();
6876 if (c_parser_next_token_is (parser
, CPP_COLON
))
6878 c_parser_consume_token (parser
);
6879 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6881 c_parser_error (parser
, "expected identifier");
6884 superclass
= c_parser_peek_token (parser
)->value
;
6885 c_parser_consume_token (parser
);
6888 superclass
= NULL_TREE
;
6891 tree proto
= NULL_TREE
;
6892 if (c_parser_next_token_is (parser
, CPP_LESS
))
6893 proto
= c_parser_objc_protocol_refs (parser
);
6894 objc_start_class_interface (id1
, superclass
, proto
, attributes
);
6897 objc_start_class_implementation (id1
, superclass
);
6898 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6899 c_parser_objc_class_instance_variables (parser
);
6902 objc_continue_interface ();
6903 c_parser_objc_methodprotolist (parser
);
6904 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6905 objc_finish_interface ();
6909 objc_continue_implementation ();
6914 /* Parse objc-class-instance-variables.
6916 objc-class-instance-variables:
6917 { objc-instance-variable-decl-list[opt] }
6919 objc-instance-variable-decl-list:
6920 objc-visibility-spec
6921 objc-instance-variable-decl ;
6923 objc-instance-variable-decl-list objc-visibility-spec
6924 objc-instance-variable-decl-list objc-instance-variable-decl ;
6925 objc-instance-variable-decl-list ;
6927 objc-visibility-spec:
6932 objc-instance-variable-decl:
6937 c_parser_objc_class_instance_variables (c_parser
*parser
)
6939 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
6940 c_parser_consume_token (parser
);
6941 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
6944 /* Parse any stray semicolon. */
6945 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6947 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6948 "extra semicolon in struct or union specified");
6949 c_parser_consume_token (parser
);
6952 /* Stop if at the end of the instance variables. */
6953 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
6955 c_parser_consume_token (parser
);
6958 /* Parse any objc-visibility-spec. */
6959 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
6961 c_parser_consume_token (parser
);
6962 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE
);
6965 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
6967 c_parser_consume_token (parser
);
6968 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED
);
6971 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
6973 c_parser_consume_token (parser
);
6974 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC
);
6977 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PACKAGE
))
6979 c_parser_consume_token (parser
);
6980 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE
);
6983 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
6985 c_parser_pragma (parser
, pragma_external
);
6989 /* Parse some comma-separated declarations. */
6990 decls
= c_parser_struct_declaration (parser
);
6992 /* Comma-separated instance variables are chained together in
6993 reverse order; add them one by one. */
6994 tree ivar
= nreverse (decls
);
6995 for (; ivar
; ivar
= DECL_CHAIN (ivar
))
6996 objc_add_instance_variable (copy_node (ivar
));
6998 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7002 /* Parse an objc-class-declaration.
7004 objc-class-declaration:
7005 @class identifier-list ;
7009 c_parser_objc_class_declaration (c_parser
*parser
)
7011 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
7012 c_parser_consume_token (parser
);
7013 /* Any identifiers, including those declared as type names, are OK
7018 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7020 c_parser_error (parser
, "expected identifier");
7021 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7022 parser
->error
= false;
7025 id
= c_parser_peek_token (parser
)->value
;
7026 objc_declare_class (id
);
7027 c_parser_consume_token (parser
);
7028 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7029 c_parser_consume_token (parser
);
7033 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7036 /* Parse an objc-alias-declaration.
7038 objc-alias-declaration:
7039 @compatibility_alias identifier identifier ;
7043 c_parser_objc_alias_declaration (c_parser
*parser
)
7046 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
7047 c_parser_consume_token (parser
);
7048 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7050 c_parser_error (parser
, "expected identifier");
7051 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7054 id1
= c_parser_peek_token (parser
)->value
;
7055 c_parser_consume_token (parser
);
7056 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7058 c_parser_error (parser
, "expected identifier");
7059 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7062 id2
= c_parser_peek_token (parser
)->value
;
7063 c_parser_consume_token (parser
);
7064 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7065 objc_declare_alias (id1
, id2
);
7068 /* Parse an objc-protocol-definition.
7070 objc-protocol-definition:
7071 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
7072 @protocol identifier-list ;
7074 "@protocol identifier ;" should be resolved as "@protocol
7075 identifier-list ;": objc-methodprotolist may not start with a
7076 semicolon in the first alternative if objc-protocol-refs are
7080 c_parser_objc_protocol_definition (c_parser
*parser
, tree attributes
)
7082 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
7084 c_parser_consume_token (parser
);
7085 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7087 c_parser_error (parser
, "expected identifier");
7090 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
7091 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
7093 /* Any identifiers, including those declared as type names, are
7098 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7100 c_parser_error (parser
, "expected identifier");
7103 id
= c_parser_peek_token (parser
)->value
;
7104 objc_declare_protocol (id
, attributes
);
7105 c_parser_consume_token (parser
);
7106 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7107 c_parser_consume_token (parser
);
7111 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7115 tree id
= c_parser_peek_token (parser
)->value
;
7116 tree proto
= NULL_TREE
;
7117 c_parser_consume_token (parser
);
7118 if (c_parser_next_token_is (parser
, CPP_LESS
))
7119 proto
= c_parser_objc_protocol_refs (parser
);
7120 parser
->objc_pq_context
= true;
7121 objc_start_protocol (id
, proto
, attributes
);
7122 c_parser_objc_methodprotolist (parser
);
7123 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7124 parser
->objc_pq_context
= false;
7125 objc_finish_interface ();
7129 /* Parse an objc-method-type.
7135 Return true if it is a class method (+) and false if it is
7136 an instance method (-).
7139 c_parser_objc_method_type (c_parser
*parser
)
7141 switch (c_parser_peek_token (parser
)->type
)
7144 c_parser_consume_token (parser
);
7147 c_parser_consume_token (parser
);
7154 /* Parse an objc-method-definition.
7156 objc-method-definition:
7157 objc-method-type objc-method-decl ;[opt] compound-statement
7161 c_parser_objc_method_definition (c_parser
*parser
)
7163 bool is_class_method
= c_parser_objc_method_type (parser
);
7164 tree decl
, attributes
= NULL_TREE
, expr
= NULL_TREE
;
7165 parser
->objc_pq_context
= true;
7166 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
,
7168 if (decl
== error_mark_node
)
7169 return; /* Bail here. */
7171 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7173 c_parser_consume_token (parser
);
7174 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7175 "extra semicolon in method definition specified");
7178 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7180 c_parser_error (parser
, "expected %<{%>");
7184 parser
->objc_pq_context
= false;
7185 if (objc_start_method_definition (is_class_method
, decl
, attributes
, expr
))
7187 add_stmt (c_parser_compound_statement (parser
));
7188 objc_finish_method_definition (current_function_decl
);
7192 /* This code is executed when we find a method definition
7193 outside of an @implementation context (or invalid for other
7194 reasons). Parse the method (to keep going) but do not emit
7197 c_parser_compound_statement (parser
);
7201 /* Parse an objc-methodprotolist.
7203 objc-methodprotolist:
7205 objc-methodprotolist objc-methodproto
7206 objc-methodprotolist declaration
7207 objc-methodprotolist ;
7211 The declaration is a data definition, which may be missing
7212 declaration specifiers under the same rules and diagnostics as
7213 other data definitions outside functions, and the stray semicolon
7214 is diagnosed the same way as a stray semicolon outside a
7218 c_parser_objc_methodprotolist (c_parser
*parser
)
7222 /* The list is terminated by @end. */
7223 switch (c_parser_peek_token (parser
)->type
)
7226 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7227 "ISO C does not allow extra %<;%> outside of a function");
7228 c_parser_consume_token (parser
);
7232 c_parser_objc_methodproto (parser
);
7235 c_parser_pragma (parser
, pragma_external
);
7240 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
7242 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
))
7243 c_parser_objc_at_property_declaration (parser
);
7244 else if (c_parser_next_token_is_keyword (parser
, RID_AT_OPTIONAL
))
7246 objc_set_method_opt (true);
7247 c_parser_consume_token (parser
);
7249 else if (c_parser_next_token_is_keyword (parser
, RID_AT_REQUIRED
))
7251 objc_set_method_opt (false);
7252 c_parser_consume_token (parser
);
7255 c_parser_declaration_or_fndef (parser
, false, false, true,
7262 /* Parse an objc-methodproto.
7265 objc-method-type objc-method-decl ;
7269 c_parser_objc_methodproto (c_parser
*parser
)
7271 bool is_class_method
= c_parser_objc_method_type (parser
);
7272 tree decl
, attributes
= NULL_TREE
;
7274 /* Remember protocol qualifiers in prototypes. */
7275 parser
->objc_pq_context
= true;
7276 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
,
7278 /* Forget protocol qualifiers now. */
7279 parser
->objc_pq_context
= false;
7281 /* Do not allow the presence of attributes to hide an erroneous
7282 method implementation in the interface section. */
7283 if (!c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7285 c_parser_error (parser
, "expected %<;%>");
7289 if (decl
!= error_mark_node
)
7290 objc_add_method_declaration (is_class_method
, decl
, attributes
);
7292 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7295 /* If we are at a position that method attributes may be present, check that
7296 there are not any parsed already (a syntax error) and then collect any
7297 specified at the current location. Finally, if new attributes were present,
7298 check that the next token is legal ( ';' for decls and '{' for defs). */
7301 c_parser_objc_maybe_method_attributes (c_parser
* parser
, tree
* attributes
)
7306 c_parser_error (parser
,
7307 "method attributes must be specified at the end only");
7308 *attributes
= NULL_TREE
;
7312 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7313 *attributes
= c_parser_attributes (parser
);
7315 /* If there were no attributes here, just report any earlier error. */
7316 if (*attributes
== NULL_TREE
|| bad
)
7319 /* If the attributes are followed by a ; or {, then just report any earlier
7321 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
7322 || c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7325 /* We've got attributes, but not at the end. */
7326 c_parser_error (parser
,
7327 "expected %<;%> or %<{%> after method attribute definition");
7331 /* Parse an objc-method-decl.
7334 ( objc-type-name ) objc-selector
7336 ( objc-type-name ) objc-keyword-selector objc-optparmlist
7337 objc-keyword-selector objc-optparmlist
7340 objc-keyword-selector:
7342 objc-keyword-selector objc-keyword-decl
7345 objc-selector : ( objc-type-name ) identifier
7346 objc-selector : identifier
7347 : ( objc-type-name ) identifier
7351 objc-optparms objc-optellipsis
7355 objc-opt-parms , parameter-declaration
7363 c_parser_objc_method_decl (c_parser
*parser
, bool is_class_method
,
7364 tree
*attributes
, tree
*expr
)
7366 tree type
= NULL_TREE
;
7368 tree parms
= NULL_TREE
;
7369 bool ellipsis
= false;
7370 bool attr_err
= false;
7372 *attributes
= NULL_TREE
;
7373 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7375 c_parser_consume_token (parser
);
7376 type
= c_parser_objc_type_name (parser
);
7377 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7379 sel
= c_parser_objc_selector (parser
);
7380 /* If there is no selector, or a colon follows, we have an
7381 objc-keyword-selector. If there is a selector, and a colon does
7382 not follow, that selector ends the objc-method-decl. */
7383 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
7386 tree list
= NULL_TREE
;
7389 tree atype
= NULL_TREE
, id
, keyworddecl
;
7390 tree param_attr
= NULL_TREE
;
7391 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7393 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7395 c_parser_consume_token (parser
);
7396 atype
= c_parser_objc_type_name (parser
);
7397 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7400 /* New ObjC allows attributes on method parameters. */
7401 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7402 param_attr
= c_parser_attributes (parser
);
7403 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7405 c_parser_error (parser
, "expected identifier");
7406 return error_mark_node
;
7408 id
= c_parser_peek_token (parser
)->value
;
7409 c_parser_consume_token (parser
);
7410 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
, param_attr
);
7411 list
= chainon (list
, keyworddecl
);
7412 tsel
= c_parser_objc_selector (parser
);
7413 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7417 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7419 /* Parse the optional parameter list. Optional Objective-C
7420 method parameters follow the C syntax, and may include '...'
7421 to denote a variable number of arguments. */
7422 parms
= make_node (TREE_LIST
);
7423 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7425 struct c_parm
*parm
;
7426 c_parser_consume_token (parser
);
7427 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7430 c_parser_consume_token (parser
);
7431 attr_err
|= c_parser_objc_maybe_method_attributes
7432 (parser
, attributes
) ;
7435 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7438 parms
= chainon (parms
,
7439 build_tree_list (NULL_TREE
, grokparm (parm
, expr
)));
7444 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7448 c_parser_error (parser
, "objective-c method declaration is expected");
7449 return error_mark_node
;
7453 return error_mark_node
;
7455 return objc_build_method_signature (is_class_method
, type
, sel
, parms
, ellipsis
);
7458 /* Parse an objc-type-name.
7461 objc-type-qualifiers[opt] type-name
7462 objc-type-qualifiers[opt]
7464 objc-type-qualifiers:
7466 objc-type-qualifiers objc-type-qualifier
7468 objc-type-qualifier: one of
7469 in out inout bycopy byref oneway
7473 c_parser_objc_type_name (c_parser
*parser
)
7475 tree quals
= NULL_TREE
;
7476 struct c_type_name
*type_name
= NULL
;
7477 tree type
= NULL_TREE
;
7480 c_token
*token
= c_parser_peek_token (parser
);
7481 if (token
->type
== CPP_KEYWORD
7482 && (token
->keyword
== RID_IN
7483 || token
->keyword
== RID_OUT
7484 || token
->keyword
== RID_INOUT
7485 || token
->keyword
== RID_BYCOPY
7486 || token
->keyword
== RID_BYREF
7487 || token
->keyword
== RID_ONEWAY
))
7489 quals
= chainon (build_tree_list (NULL_TREE
, token
->value
), quals
);
7490 c_parser_consume_token (parser
);
7495 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
7496 type_name
= c_parser_type_name (parser
);
7498 type
= groktypename (type_name
, NULL
, NULL
);
7500 /* If the type is unknown, and error has already been produced and
7501 we need to recover from the error. In that case, use NULL_TREE
7502 for the type, as if no type had been specified; this will use the
7503 default type ('id') which is good for error recovery. */
7504 if (type
== error_mark_node
)
7507 return build_tree_list (quals
, type
);
7510 /* Parse objc-protocol-refs.
7517 c_parser_objc_protocol_refs (c_parser
*parser
)
7519 tree list
= NULL_TREE
;
7520 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
7521 c_parser_consume_token (parser
);
7522 /* Any identifiers, including those declared as type names, are OK
7527 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7529 c_parser_error (parser
, "expected identifier");
7532 id
= c_parser_peek_token (parser
)->value
;
7533 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7534 c_parser_consume_token (parser
);
7535 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7536 c_parser_consume_token (parser
);
7540 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
7544 /* Parse an objc-try-catch-finally-statement.
7546 objc-try-catch-finally-statement:
7547 @try compound-statement objc-catch-list[opt]
7548 @try compound-statement objc-catch-list[opt] @finally compound-statement
7551 @catch ( objc-catch-parameter-declaration ) compound-statement
7552 objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
7554 objc-catch-parameter-declaration:
7555 parameter-declaration
7558 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
7560 PS: This function is identical to cp_parser_objc_try_catch_finally_statement
7561 for C++. Keep them in sync. */
7564 c_parser_objc_try_catch_finally_statement (c_parser
*parser
)
7566 location_t location
;
7569 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
7570 c_parser_consume_token (parser
);
7571 location
= c_parser_peek_token (parser
)->location
;
7572 objc_maybe_warn_exceptions (location
);
7573 stmt
= c_parser_compound_statement (parser
);
7574 objc_begin_try_stmt (location
, stmt
);
7576 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
7578 struct c_parm
*parm
;
7579 tree parameter_declaration
= error_mark_node
;
7580 bool seen_open_paren
= false;
7582 c_parser_consume_token (parser
);
7583 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7584 seen_open_paren
= true;
7585 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7587 /* We have "@catch (...)" (where the '...' are literally
7588 what is in the code). Skip the '...'.
7589 parameter_declaration is set to NULL_TREE, and
7590 objc_being_catch_clauses() knows that that means
7592 c_parser_consume_token (parser
);
7593 parameter_declaration
= NULL_TREE
;
7597 /* We have "@catch (NSException *exception)" or something
7598 like that. Parse the parameter declaration. */
7599 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7601 parameter_declaration
= error_mark_node
;
7603 parameter_declaration
= grokparm (parm
, NULL
);
7605 if (seen_open_paren
)
7606 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7609 /* If there was no open parenthesis, we are recovering from
7610 an error, and we are trying to figure out what mistake
7611 the user has made. */
7613 /* If there is an immediate closing parenthesis, the user
7614 probably forgot the opening one (ie, they typed "@catch
7615 NSException *e)". Parse the closing parenthesis and keep
7617 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
7618 c_parser_consume_token (parser
);
7620 /* If these is no immediate closing parenthesis, the user
7621 probably doesn't know that parenthesis are required at
7622 all (ie, they typed "@catch NSException *e"). So, just
7623 forget about the closing parenthesis and keep going. */
7625 objc_begin_catch_clause (parameter_declaration
);
7626 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7627 c_parser_compound_statement_nostart (parser
);
7628 objc_finish_catch_clause ();
7630 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
7632 c_parser_consume_token (parser
);
7633 location
= c_parser_peek_token (parser
)->location
;
7634 stmt
= c_parser_compound_statement (parser
);
7635 objc_build_finally_clause (location
, stmt
);
7637 objc_finish_try_stmt ();
7640 /* Parse an objc-synchronized-statement.
7642 objc-synchronized-statement:
7643 @synchronized ( expression ) compound-statement
7647 c_parser_objc_synchronized_statement (c_parser
*parser
)
7651 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
7652 c_parser_consume_token (parser
);
7653 loc
= c_parser_peek_token (parser
)->location
;
7654 objc_maybe_warn_exceptions (loc
);
7655 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7657 expr
= c_parser_expression (parser
).value
;
7658 expr
= c_fully_fold (expr
, false, NULL
);
7659 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7662 expr
= error_mark_node
;
7663 stmt
= c_parser_compound_statement (parser
);
7664 objc_build_synchronized (loc
, expr
, stmt
);
7667 /* Parse an objc-selector; return NULL_TREE without an error if the
7668 next token is not an objc-selector.
7673 enum struct union if else while do for switch case default
7674 break continue return goto asm sizeof typeof __alignof
7675 unsigned long const short volatile signed restrict _Complex
7676 in out inout bycopy byref oneway int char float double void _Bool
7678 ??? Why this selection of keywords but not, for example, storage
7679 class specifiers? */
7682 c_parser_objc_selector (c_parser
*parser
)
7684 c_token
*token
= c_parser_peek_token (parser
);
7685 tree value
= token
->value
;
7686 if (token
->type
== CPP_NAME
)
7688 c_parser_consume_token (parser
);
7691 if (token
->type
!= CPP_KEYWORD
)
7693 switch (token
->keyword
)
7735 c_parser_consume_token (parser
);
7742 /* Parse an objc-selector-arg.
7746 objc-keywordname-list
7748 objc-keywordname-list:
7750 objc-keywordname-list objc-keywordname
7758 c_parser_objc_selector_arg (c_parser
*parser
)
7760 tree sel
= c_parser_objc_selector (parser
);
7761 tree list
= NULL_TREE
;
7762 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7766 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7768 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
7769 sel
= c_parser_objc_selector (parser
);
7770 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7776 /* Parse an objc-receiver.
7785 c_parser_objc_receiver (c_parser
*parser
)
7787 if (c_parser_peek_token (parser
)->type
== CPP_NAME
7788 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
7789 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
7791 tree id
= c_parser_peek_token (parser
)->value
;
7792 c_parser_consume_token (parser
);
7793 return objc_get_class_reference (id
);
7795 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
7798 /* Parse objc-message-args.
7802 objc-keywordarg-list
7804 objc-keywordarg-list:
7806 objc-keywordarg-list objc-keywordarg
7809 objc-selector : objc-keywordexpr
7814 c_parser_objc_message_args (c_parser
*parser
)
7816 tree sel
= c_parser_objc_selector (parser
);
7817 tree list
= NULL_TREE
;
7818 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7823 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7824 return error_mark_node
;
7825 keywordexpr
= c_parser_objc_keywordexpr (parser
);
7826 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
7827 sel
= c_parser_objc_selector (parser
);
7828 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7834 /* Parse an objc-keywordexpr.
7841 c_parser_objc_keywordexpr (c_parser
*parser
)
7844 VEC(tree
,gc
) *expr_list
= c_parser_expr_list (parser
, true, true, NULL
);
7845 if (VEC_length (tree
, expr_list
) == 1)
7847 /* Just return the expression, remove a level of
7849 ret
= VEC_index (tree
, expr_list
, 0);
7853 /* We have a comma expression, we will collapse later. */
7854 ret
= build_tree_list_vec (expr_list
);
7856 release_tree_vector (expr_list
);
7860 /* A check, needed in several places, that ObjC interface, implementation or
7861 method definitions are not prefixed by incorrect items. */
7863 c_parser_objc_diagnose_bad_element_prefix (c_parser
*parser
,
7864 struct c_declspecs
*specs
)
7866 if (!specs
->declspecs_seen_p
|| specs
->non_sc_seen_p
7867 || specs
->typespec_kind
!= ctsk_none
)
7869 c_parser_error (parser
,
7870 "no type or storage class may be specified here,");
7871 c_parser_skip_to_end_of_block_or_statement (parser
);
7877 /* Parse an Objective-C @property declaration. The syntax is:
7879 objc-property-declaration:
7880 '@property' objc-property-attributes[opt] struct-declaration ;
7882 objc-property-attributes:
7883 '(' objc-property-attribute-list ')'
7885 objc-property-attribute-list:
7886 objc-property-attribute
7887 objc-property-attribute-list, objc-property-attribute
7889 objc-property-attribute
7890 'getter' = identifier
7891 'setter' = identifier
7900 @property NSString *name;
7901 @property (readonly) id object;
7902 @property (retain, nonatomic, getter=getTheName) id name;
7903 @property int a, b, c;
7905 PS: This function is identical to cp_parser_objc_at_propery_declaration
7906 for C++. Keep them in sync. */
7908 c_parser_objc_at_property_declaration (c_parser
*parser
)
7910 /* The following variables hold the attributes of the properties as
7911 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
7912 seen. When we see an attribute, we set them to 'true' (if they
7913 are boolean properties) or to the identifier (if they have an
7914 argument, ie, for getter and setter). Note that here we only
7915 parse the list of attributes, check the syntax and accumulate the
7916 attributes that we find. objc_add_property_declaration() will
7917 then process the information. */
7918 bool property_assign
= false;
7919 bool property_copy
= false;
7920 tree property_getter_ident
= NULL_TREE
;
7921 bool property_nonatomic
= false;
7922 bool property_readonly
= false;
7923 bool property_readwrite
= false;
7924 bool property_retain
= false;
7925 tree property_setter_ident
= NULL_TREE
;
7927 /* 'properties' is the list of properties that we read. Usually a
7928 single one, but maybe more (eg, in "@property int a, b, c;" there
7933 loc
= c_parser_peek_token (parser
)->location
;
7934 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
));
7936 c_parser_consume_token (parser
); /* Eat '@property'. */
7938 /* Parse the optional attribute list... */
7939 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7942 c_parser_consume_token (parser
);
7944 /* Property attribute keywords are valid now. */
7945 parser
->objc_property_attr_context
= true;
7949 bool syntax_error
= false;
7950 c_token
*token
= c_parser_peek_token (parser
);
7953 if (token
->type
!= CPP_KEYWORD
)
7955 if (token
->type
== CPP_CLOSE_PAREN
)
7956 c_parser_error (parser
, "expected identifier");
7959 c_parser_consume_token (parser
);
7960 c_parser_error (parser
, "unknown property attribute");
7964 keyword
= token
->keyword
;
7965 c_parser_consume_token (parser
);
7968 case RID_ASSIGN
: property_assign
= true; break;
7969 case RID_COPY
: property_copy
= true; break;
7970 case RID_NONATOMIC
: property_nonatomic
= true; break;
7971 case RID_READONLY
: property_readonly
= true; break;
7972 case RID_READWRITE
: property_readwrite
= true; break;
7973 case RID_RETAIN
: property_retain
= true; break;
7977 if (c_parser_next_token_is_not (parser
, CPP_EQ
))
7979 if (keyword
== RID_GETTER
)
7980 c_parser_error (parser
,
7981 "missing %<=%> (after %<getter%> attribute)");
7983 c_parser_error (parser
,
7984 "missing %<=%> (after %<setter%> attribute)");
7985 syntax_error
= true;
7988 c_parser_consume_token (parser
); /* eat the = */
7989 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7991 c_parser_error (parser
, "expected identifier");
7992 syntax_error
= true;
7995 if (keyword
== RID_SETTER
)
7997 if (property_setter_ident
!= NULL_TREE
)
7998 c_parser_error (parser
, "the %<setter%> attribute may only be specified once");
8000 property_setter_ident
= c_parser_peek_token (parser
)->value
;
8001 c_parser_consume_token (parser
);
8002 if (c_parser_next_token_is_not (parser
, CPP_COLON
))
8003 c_parser_error (parser
, "setter name must terminate with %<:%>");
8005 c_parser_consume_token (parser
);
8009 if (property_getter_ident
!= NULL_TREE
)
8010 c_parser_error (parser
, "the %<getter%> attribute may only be specified once");
8012 property_getter_ident
= c_parser_peek_token (parser
)->value
;
8013 c_parser_consume_token (parser
);
8017 c_parser_error (parser
, "unknown property attribute");
8018 syntax_error
= true;
8025 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8026 c_parser_consume_token (parser
);
8030 parser
->objc_property_attr_context
= false;
8031 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8033 /* ... and the property declaration(s). */
8034 properties
= c_parser_struct_declaration (parser
);
8036 if (properties
== error_mark_node
)
8038 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8039 parser
->error
= false;
8043 if (properties
== NULL_TREE
)
8044 c_parser_error (parser
, "expected identifier");
8047 /* Comma-separated properties are chained together in
8048 reverse order; add them one by one. */
8049 properties
= nreverse (properties
);
8051 for (; properties
; properties
= TREE_CHAIN (properties
))
8052 objc_add_property_declaration (loc
, copy_node (properties
),
8053 property_readonly
, property_readwrite
,
8054 property_assign
, property_retain
,
8055 property_copy
, property_nonatomic
,
8056 property_getter_ident
, property_setter_ident
);
8059 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8060 parser
->error
= false;
8063 /* Parse an Objective-C @synthesize declaration. The syntax is:
8065 objc-synthesize-declaration:
8066 @synthesize objc-synthesize-identifier-list ;
8068 objc-synthesize-identifier-list:
8069 objc-synthesize-identifier
8070 objc-synthesize-identifier-list, objc-synthesize-identifier
8072 objc-synthesize-identifier
8074 identifier = identifier
8077 @synthesize MyProperty;
8078 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
8080 PS: This function is identical to cp_parser_objc_at_synthesize_declaration
8081 for C++. Keep them in sync.
8084 c_parser_objc_at_synthesize_declaration (c_parser
*parser
)
8086 tree list
= NULL_TREE
;
8088 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNTHESIZE
));
8089 loc
= c_parser_peek_token (parser
)->location
;
8091 c_parser_consume_token (parser
);
8094 tree property
, ivar
;
8095 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8097 c_parser_error (parser
, "expected identifier");
8098 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8099 /* Once we find the semicolon, we can resume normal parsing.
8100 We have to reset parser->error manually because
8101 c_parser_skip_until_found() won't reset it for us if the
8102 next token is precisely a semicolon. */
8103 parser
->error
= false;
8106 property
= c_parser_peek_token (parser
)->value
;
8107 c_parser_consume_token (parser
);
8108 if (c_parser_next_token_is (parser
, CPP_EQ
))
8110 c_parser_consume_token (parser
);
8111 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8113 c_parser_error (parser
, "expected identifier");
8114 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8115 parser
->error
= false;
8118 ivar
= c_parser_peek_token (parser
)->value
;
8119 c_parser_consume_token (parser
);
8123 list
= chainon (list
, build_tree_list (ivar
, property
));
8124 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8125 c_parser_consume_token (parser
);
8129 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8130 objc_add_synthesize_declaration (loc
, list
);
8133 /* Parse an Objective-C @dynamic declaration. The syntax is:
8135 objc-dynamic-declaration:
8136 @dynamic identifier-list ;
8139 @dynamic MyProperty;
8140 @dynamic MyProperty, AnotherProperty;
8142 PS: This function is identical to cp_parser_objc_at_dynamic_declaration
8143 for C++. Keep them in sync.
8146 c_parser_objc_at_dynamic_declaration (c_parser
*parser
)
8148 tree list
= NULL_TREE
;
8150 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_DYNAMIC
));
8151 loc
= c_parser_peek_token (parser
)->location
;
8153 c_parser_consume_token (parser
);
8157 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8159 c_parser_error (parser
, "expected identifier");
8160 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8161 parser
->error
= false;
8164 property
= c_parser_peek_token (parser
)->value
;
8165 list
= chainon (list
, build_tree_list (NULL_TREE
, property
));
8166 c_parser_consume_token (parser
);
8167 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8168 c_parser_consume_token (parser
);
8172 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8173 objc_add_dynamic_declaration (loc
, list
);
8177 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
8178 should be considered, statements. ALLOW_STMT is true if we're within
8179 the context of a function and such pragmas are to be allowed. Returns
8180 true if we actually parsed such a pragma. */
8183 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
8187 id
= c_parser_peek_token (parser
)->pragma_kind
;
8188 gcc_assert (id
!= PRAGMA_NONE
);
8192 case PRAGMA_OMP_BARRIER
:
8193 if (context
!= pragma_compound
)
8195 if (context
== pragma_stmt
)
8196 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
8197 "used in compound statements");
8200 c_parser_omp_barrier (parser
);
8203 case PRAGMA_OMP_FLUSH
:
8204 if (context
!= pragma_compound
)
8206 if (context
== pragma_stmt
)
8207 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
8208 "used in compound statements");
8211 c_parser_omp_flush (parser
);
8214 case PRAGMA_OMP_TASKWAIT
:
8215 if (context
!= pragma_compound
)
8217 if (context
== pragma_stmt
)
8218 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
8219 "used in compound statements");
8222 c_parser_omp_taskwait (parser
);
8225 case PRAGMA_OMP_THREADPRIVATE
:
8226 c_parser_omp_threadprivate (parser
);
8229 case PRAGMA_OMP_SECTION
:
8230 error_at (c_parser_peek_token (parser
)->location
,
8231 "%<#pragma omp section%> may only be used in "
8232 "%<#pragma omp sections%> construct");
8233 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8236 case PRAGMA_GCC_PCH_PREPROCESS
:
8237 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
8238 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8242 if (id
< PRAGMA_FIRST_EXTERNAL
)
8244 if (context
== pragma_external
)
8247 c_parser_error (parser
, "expected declaration specifiers");
8248 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8251 c_parser_omp_construct (parser
);
8257 c_parser_consume_pragma (parser
);
8258 c_invoke_pragma_handler (id
);
8260 /* Skip to EOL, but suppress any error message. Those will have been
8261 generated by the handler routine through calling error, as opposed
8262 to calling c_parser_error. */
8263 parser
->error
= true;
8264 c_parser_skip_to_pragma_eol (parser
);
8269 /* The interface the pragma parsers have to the lexer. */
8272 pragma_lex (tree
*value
)
8274 c_token
*tok
= c_parser_peek_token (the_parser
);
8275 enum cpp_ttype ret
= tok
->type
;
8277 *value
= tok
->value
;
8278 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
8282 if (ret
== CPP_KEYWORD
)
8284 c_parser_consume_token (the_parser
);
8291 c_parser_pragma_pch_preprocess (c_parser
*parser
)
8295 c_parser_consume_pragma (parser
);
8296 if (c_parser_next_token_is (parser
, CPP_STRING
))
8298 name
= c_parser_peek_token (parser
)->value
;
8299 c_parser_consume_token (parser
);
8302 c_parser_error (parser
, "expected string literal");
8303 c_parser_skip_to_pragma_eol (parser
);
8306 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
8309 /* OpenMP 2.5 parsing routines. */
8311 /* Returns name of the next clause.
8312 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
8313 the token is not consumed. Otherwise appropriate pragma_omp_clause is
8314 returned and the token is consumed. */
8316 static pragma_omp_clause
8317 c_parser_omp_clause_name (c_parser
*parser
)
8319 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
8321 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
8322 result
= PRAGMA_OMP_CLAUSE_IF
;
8323 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
8324 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
8325 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8327 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8332 if (!strcmp ("collapse", p
))
8333 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
8334 else if (!strcmp ("copyin", p
))
8335 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
8336 else if (!strcmp ("copyprivate", p
))
8337 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
8340 if (!strcmp ("firstprivate", p
))
8341 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
8344 if (!strcmp ("lastprivate", p
))
8345 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
8348 if (!strcmp ("nowait", p
))
8349 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
8350 else if (!strcmp ("num_threads", p
))
8351 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
8354 if (!strcmp ("ordered", p
))
8355 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
8358 if (!strcmp ("private", p
))
8359 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
8362 if (!strcmp ("reduction", p
))
8363 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
8366 if (!strcmp ("schedule", p
))
8367 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
8368 else if (!strcmp ("shared", p
))
8369 result
= PRAGMA_OMP_CLAUSE_SHARED
;
8372 if (!strcmp ("untied", p
))
8373 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
8378 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
8379 c_parser_consume_token (parser
);
8384 /* Validate that a clause of the given type does not already exist. */
8387 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
8392 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
8393 if (OMP_CLAUSE_CODE (c
) == code
)
8395 location_t loc
= OMP_CLAUSE_LOCATION (c
);
8396 error_at (loc
, "too many %qs clauses", name
);
8404 variable-list , identifier
8406 If KIND is nonzero, create the appropriate node and install the
8407 decl in OMP_CLAUSE_DECL and add the node to the head of the list.
8408 If KIND is nonzero, CLAUSE_LOC is the location of the clause.
8410 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
8411 return the list created. */
8414 c_parser_omp_variable_list (c_parser
*parser
,
8415 location_t clause_loc
,
8416 enum omp_clause_code kind
,
8419 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
8420 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
8421 c_parser_error (parser
, "expected identifier");
8423 while (c_parser_next_token_is (parser
, CPP_NAME
)
8424 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
8426 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
8429 undeclared_variable (c_parser_peek_token (parser
)->location
,
8430 c_parser_peek_token (parser
)->value
);
8431 else if (t
== error_mark_node
)
8435 tree u
= build_omp_clause (clause_loc
, kind
);
8436 OMP_CLAUSE_DECL (u
) = t
;
8437 OMP_CLAUSE_CHAIN (u
) = list
;
8441 list
= tree_cons (t
, NULL_TREE
, list
);
8443 c_parser_consume_token (parser
);
8445 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
8448 c_parser_consume_token (parser
);
8454 /* Similarly, but expect leading and trailing parenthesis. This is a very
8455 common case for omp clauses. */
8458 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
8461 /* The clauses location. */
8462 location_t loc
= c_parser_peek_token (parser
)->location
;
8464 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8466 list
= c_parser_omp_variable_list (parser
, loc
, kind
, list
);
8467 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8473 collapse ( constant-expression ) */
8476 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
8478 tree c
, num
= error_mark_node
;
8482 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
8484 loc
= c_parser_peek_token (parser
)->location
;
8485 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8487 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
8488 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8490 if (num
== error_mark_node
)
8492 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
8493 || !host_integerp (num
, 0)
8494 || (n
= tree_low_cst (num
, 0)) <= 0
8498 "collapse argument needs positive constant integer expression");
8501 c
= build_omp_clause (loc
, OMP_CLAUSE_COLLAPSE
);
8502 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
8503 OMP_CLAUSE_CHAIN (c
) = list
;
8508 copyin ( variable-list ) */
8511 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
8513 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
8517 copyprivate ( variable-list ) */
8520 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
8522 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
8526 default ( shared | none ) */
8529 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
8531 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
8532 location_t loc
= c_parser_peek_token (parser
)->location
;
8535 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8537 if (c_parser_next_token_is (parser
, CPP_NAME
))
8539 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8544 if (strcmp ("none", p
) != 0)
8546 kind
= OMP_CLAUSE_DEFAULT_NONE
;
8550 if (strcmp ("shared", p
) != 0)
8552 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
8559 c_parser_consume_token (parser
);
8564 c_parser_error (parser
, "expected %<none%> or %<shared%>");
8566 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8568 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
8571 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
8572 c
= build_omp_clause (loc
, OMP_CLAUSE_DEFAULT
);
8573 OMP_CLAUSE_CHAIN (c
) = list
;
8574 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
8580 firstprivate ( variable-list ) */
8583 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
8585 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
8589 if ( expression ) */
8592 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
8594 location_t loc
= c_parser_peek_token (parser
)->location
;
8595 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
8597 tree t
= c_parser_paren_condition (parser
);
8600 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
8602 c
= build_omp_clause (loc
, OMP_CLAUSE_IF
);
8603 OMP_CLAUSE_IF_EXPR (c
) = t
;
8604 OMP_CLAUSE_CHAIN (c
) = list
;
8608 c_parser_error (parser
, "expected %<(%>");
8614 lastprivate ( variable-list ) */
8617 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
8619 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
8626 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8629 location_t loc
= c_parser_peek_token (parser
)->location
;
8631 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
8633 c
= build_omp_clause (loc
, OMP_CLAUSE_NOWAIT
);
8634 OMP_CLAUSE_CHAIN (c
) = list
;
8639 num_threads ( expression ) */
8642 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
8644 location_t num_threads_loc
= c_parser_peek_token (parser
)->location
;
8645 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8647 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
8648 tree c
, t
= c_parser_expression (parser
).value
;
8649 t
= c_fully_fold (t
, false, NULL
);
8651 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8653 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
8655 c_parser_error (parser
, "expected integer expression");
8659 /* Attempt to statically determine when the number isn't positive. */
8660 c
= fold_build2_loc (expr_loc
, LE_EXPR
, boolean_type_node
, t
,
8661 build_int_cst (TREE_TYPE (t
), 0));
8662 if (CAN_HAVE_LOCATION_P (c
))
8663 SET_EXPR_LOCATION (c
, expr_loc
);
8664 if (c
== boolean_true_node
)
8666 warning_at (expr_loc
, 0,
8667 "%<num_threads%> value must be positive");
8668 t
= integer_one_node
;
8671 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
8673 c
= build_omp_clause (num_threads_loc
, OMP_CLAUSE_NUM_THREADS
);
8674 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
8675 OMP_CLAUSE_CHAIN (c
) = list
;
8686 c_parser_omp_clause_ordered (c_parser
*parser
, tree list
)
8690 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
8692 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8693 OMP_CLAUSE_ORDERED
);
8694 OMP_CLAUSE_CHAIN (c
) = list
;
8700 private ( variable-list ) */
8703 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
8705 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
8709 reduction ( reduction-operator : variable-list )
8712 One of: + * - & ^ | && || */
8715 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
8717 location_t clause_loc
= c_parser_peek_token (parser
)->location
;
8718 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8720 enum tree_code code
;
8722 switch (c_parser_peek_token (parser
)->type
)
8734 code
= BIT_AND_EXPR
;
8737 code
= BIT_XOR_EXPR
;
8740 code
= BIT_IOR_EXPR
;
8743 code
= TRUTH_ANDIF_EXPR
;
8746 code
= TRUTH_ORIF_EXPR
;
8749 c_parser_error (parser
,
8750 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
8751 "%<^%>, %<|%>, %<&&%>, or %<||%>");
8752 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8755 c_parser_consume_token (parser
);
8756 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
8760 nl
= c_parser_omp_variable_list (parser
, clause_loc
,
8761 OMP_CLAUSE_REDUCTION
, list
);
8762 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
8763 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
8767 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8773 schedule ( schedule-kind )
8774 schedule ( schedule-kind , expression )
8777 static | dynamic | guided | runtime | auto
8781 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
8784 location_t loc
= c_parser_peek_token (parser
)->location
;
8786 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8789 c
= build_omp_clause (loc
, OMP_CLAUSE_SCHEDULE
);
8791 if (c_parser_next_token_is (parser
, CPP_NAME
))
8793 tree kind
= c_parser_peek_token (parser
)->value
;
8794 const char *p
= IDENTIFIER_POINTER (kind
);
8799 if (strcmp ("dynamic", p
) != 0)
8801 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
8805 if (strcmp ("guided", p
) != 0)
8807 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
8811 if (strcmp ("runtime", p
) != 0)
8813 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
8820 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
8821 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
8822 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
8823 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
8827 c_parser_consume_token (parser
);
8828 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8831 c_parser_consume_token (parser
);
8833 here
= c_parser_peek_token (parser
)->location
;
8834 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
8835 t
= c_fully_fold (t
, false, NULL
);
8837 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
8838 error_at (here
, "schedule %<runtime%> does not take "
8839 "a %<chunk_size%> parameter");
8840 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
8842 "schedule %<auto%> does not take "
8843 "a %<chunk_size%> parameter");
8844 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
8845 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
8847 c_parser_error (parser
, "expected integer expression");
8849 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8852 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
8853 "expected %<,%> or %<)%>");
8855 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
8856 OMP_CLAUSE_CHAIN (c
) = list
;
8860 c_parser_error (parser
, "invalid schedule kind");
8861 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8866 shared ( variable-list ) */
8869 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
8871 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
8878 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8882 /* FIXME: Should we allow duplicates? */
8883 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
8885 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8887 OMP_CLAUSE_CHAIN (c
) = list
;
8892 /* Parse all OpenMP clauses. The set clauses allowed by the directive
8893 is a bitmask in MASK. Return the list of clauses found; the result
8894 of clause default goes in *pdefault. */
8897 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
8900 tree clauses
= NULL
;
8903 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
8906 pragma_omp_clause c_kind
;
8908 tree prev
= clauses
;
8910 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
8911 c_parser_consume_token (parser
);
8914 here
= c_parser_peek_token (parser
)->location
;
8915 c_kind
= c_parser_omp_clause_name (parser
);
8919 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
8920 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
8921 c_name
= "collapse";
8923 case PRAGMA_OMP_CLAUSE_COPYIN
:
8924 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
8927 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
8928 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
8929 c_name
= "copyprivate";
8931 case PRAGMA_OMP_CLAUSE_DEFAULT
:
8932 clauses
= c_parser_omp_clause_default (parser
, clauses
);
8935 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
8936 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
8937 c_name
= "firstprivate";
8939 case PRAGMA_OMP_CLAUSE_IF
:
8940 clauses
= c_parser_omp_clause_if (parser
, clauses
);
8943 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
8944 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
8945 c_name
= "lastprivate";
8947 case PRAGMA_OMP_CLAUSE_NOWAIT
:
8948 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
8951 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
8952 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
8953 c_name
= "num_threads";
8955 case PRAGMA_OMP_CLAUSE_ORDERED
:
8956 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
8959 case PRAGMA_OMP_CLAUSE_PRIVATE
:
8960 clauses
= c_parser_omp_clause_private (parser
, clauses
);
8963 case PRAGMA_OMP_CLAUSE_REDUCTION
:
8964 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
8965 c_name
= "reduction";
8967 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
8968 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
8969 c_name
= "schedule";
8971 case PRAGMA_OMP_CLAUSE_SHARED
:
8972 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
8975 case PRAGMA_OMP_CLAUSE_UNTIED
:
8976 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
8980 c_parser_error (parser
, "expected %<#pragma omp%> clause");
8984 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
8986 /* Remove the invalid clause(s) from the list to avoid
8987 confusing the rest of the compiler. */
8989 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
8994 c_parser_skip_to_pragma_eol (parser
);
8996 return c_finish_omp_clauses (clauses
);
9003 In practice, we're also interested in adding the statement to an
9004 outer node. So it is convenient if we work around the fact that
9005 c_parser_statement calls add_stmt. */
9008 c_parser_omp_structured_block (c_parser
*parser
)
9010 tree stmt
= push_stmt_list ();
9011 c_parser_statement (parser
);
9012 return pop_stmt_list (stmt
);
9016 # pragma omp atomic new-line
9020 x binop= expr | x++ | ++x | x-- | --x
9022 +, *, -, /, &, ^, |, <<, >>
9024 where x is an lvalue expression with scalar type.
9026 LOC is the location of the #pragma token. */
9029 c_parser_omp_atomic (location_t loc
, c_parser
*parser
)
9033 enum tree_code code
;
9034 struct c_expr rhs_expr
;
9036 c_parser_skip_to_pragma_eol (parser
);
9038 lhs
= c_parser_unary_expression (parser
).value
;
9039 lhs
= c_fully_fold (lhs
, false, NULL
);
9040 switch (TREE_CODE (lhs
))
9044 c_parser_skip_to_end_of_block_or_statement (parser
);
9047 case PREINCREMENT_EXPR
:
9048 case POSTINCREMENT_EXPR
:
9049 lhs
= TREE_OPERAND (lhs
, 0);
9051 rhs
= integer_one_node
;
9054 case PREDECREMENT_EXPR
:
9055 case POSTDECREMENT_EXPR
:
9056 lhs
= TREE_OPERAND (lhs
, 0);
9058 rhs
= integer_one_node
;
9062 if (TREE_CODE (TREE_OPERAND (lhs
, 0)) == SAVE_EXPR
9063 && TREE_CODE (TREE_OPERAND (lhs
, 1)) == COMPOUND_EXPR
9064 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0)) == MODIFY_EXPR
9065 && TREE_OPERAND (TREE_OPERAND (lhs
, 1), 1) == TREE_OPERAND (lhs
, 0)
9066 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
9067 (TREE_OPERAND (lhs
, 1), 0), 0)))
9069 /* Undo effects of boolean_increment for post {in,de}crement. */
9070 lhs
= TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0);
9073 if (TREE_CODE (lhs
) == MODIFY_EXPR
9074 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs
, 0))) == BOOLEAN_TYPE
)
9076 /* Undo effects of boolean_increment. */
9077 if (integer_onep (TREE_OPERAND (lhs
, 1)))
9079 /* This is pre or post increment. */
9080 rhs
= TREE_OPERAND (lhs
, 1);
9081 lhs
= TREE_OPERAND (lhs
, 0);
9085 if (TREE_CODE (TREE_OPERAND (lhs
, 1)) == TRUTH_NOT_EXPR
9086 && TREE_OPERAND (lhs
, 0)
9087 == TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0))
9089 /* This is pre or post decrement. */
9090 rhs
= TREE_OPERAND (lhs
, 1);
9091 lhs
= TREE_OPERAND (lhs
, 0);
9098 switch (c_parser_peek_token (parser
)->type
)
9104 code
= TRUNC_DIV_EXPR
;
9119 code
= BIT_AND_EXPR
;
9122 code
= BIT_IOR_EXPR
;
9125 code
= BIT_XOR_EXPR
;
9128 c_parser_error (parser
,
9129 "invalid operator for %<#pragma omp atomic%>");
9133 /* Arrange to pass the location of the assignment operator to
9134 c_finish_omp_atomic. */
9135 loc
= c_parser_peek_token (parser
)->location
;
9136 c_parser_consume_token (parser
);
9138 location_t rhs_loc
= c_parser_peek_token (parser
)->location
;
9139 rhs_expr
= c_parser_expression (parser
);
9140 rhs_expr
= default_function_array_read_conversion (rhs_loc
, rhs_expr
);
9142 rhs
= rhs_expr
.value
;
9143 rhs
= c_fully_fold (rhs
, false, NULL
);
9146 stmt
= c_finish_omp_atomic (loc
, code
, lhs
, rhs
);
9147 if (stmt
!= error_mark_node
)
9149 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9154 # pragma omp barrier new-line
9158 c_parser_omp_barrier (c_parser
*parser
)
9160 location_t loc
= c_parser_peek_token (parser
)->location
;
9161 c_parser_consume_pragma (parser
);
9162 c_parser_skip_to_pragma_eol (parser
);
9164 c_finish_omp_barrier (loc
);
9168 # pragma omp critical [(name)] new-line
9171 LOC is the location of the #pragma itself. */
9174 c_parser_omp_critical (location_t loc
, c_parser
*parser
)
9176 tree stmt
, name
= NULL
;
9178 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9180 c_parser_consume_token (parser
);
9181 if (c_parser_next_token_is (parser
, CPP_NAME
))
9183 name
= c_parser_peek_token (parser
)->value
;
9184 c_parser_consume_token (parser
);
9185 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9188 c_parser_error (parser
, "expected identifier");
9190 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9191 c_parser_error (parser
, "expected %<(%> or end of line");
9192 c_parser_skip_to_pragma_eol (parser
);
9194 stmt
= c_parser_omp_structured_block (parser
);
9195 return c_finish_omp_critical (loc
, stmt
, name
);
9199 # pragma omp flush flush-vars[opt] new-line
9202 ( variable-list ) */
9205 c_parser_omp_flush (c_parser
*parser
)
9207 location_t loc
= c_parser_peek_token (parser
)->location
;
9208 c_parser_consume_pragma (parser
);
9209 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9210 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9211 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9212 c_parser_error (parser
, "expected %<(%> or end of line");
9213 c_parser_skip_to_pragma_eol (parser
);
9215 c_finish_omp_flush (loc
);
9218 /* Parse the restricted form of the for statement allowed by OpenMP.
9219 The real trick here is to determine the loop control variable early
9220 so that we can push a new decl if necessary to make it private.
9221 LOC is the location of the OMP in "#pragma omp". */
9224 c_parser_omp_for_loop (location_t loc
,
9225 c_parser
*parser
, tree clauses
, tree
*par_clauses
)
9227 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
9228 tree declv
, condv
, incrv
, initv
, ret
= NULL
;
9229 bool fail
= false, open_brace_parsed
= false;
9230 int i
, collapse
= 1, nbraces
= 0;
9232 VEC(tree
,gc
) *for_block
= make_tree_vector ();
9234 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
9235 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
9236 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
9238 gcc_assert (collapse
>= 1);
9240 declv
= make_tree_vec (collapse
);
9241 initv
= make_tree_vec (collapse
);
9242 condv
= make_tree_vec (collapse
);
9243 incrv
= make_tree_vec (collapse
);
9245 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
9247 c_parser_error (parser
, "for statement expected");
9250 for_loc
= c_parser_peek_token (parser
)->location
;
9251 c_parser_consume_token (parser
);
9253 for (i
= 0; i
< collapse
; i
++)
9257 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9260 /* Parse the initialization declaration or expression. */
9261 if (c_parser_next_tokens_start_declaration (parser
))
9264 VEC_safe_push (tree
, gc
, for_block
, c_begin_compound_stmt (true));
9265 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
9266 decl
= check_for_loop_decls (for_loc
, flag_isoc99
);
9269 if (DECL_INITIAL (decl
) == error_mark_node
)
9270 decl
= error_mark_node
;
9273 else if (c_parser_next_token_is (parser
, CPP_NAME
)
9274 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
9276 struct c_expr decl_exp
;
9277 struct c_expr init_exp
;
9278 location_t init_loc
;
9280 decl_exp
= c_parser_postfix_expression (parser
);
9281 decl
= decl_exp
.value
;
9283 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
9285 init_loc
= c_parser_peek_token (parser
)->location
;
9286 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
9287 init_exp
= default_function_array_read_conversion (init_loc
,
9289 init
= build_modify_expr (init_loc
, decl
, decl_exp
.original_type
,
9290 NOP_EXPR
, init_loc
, init_exp
.value
,
9291 init_exp
.original_type
);
9292 init
= c_process_expr_stmt (init_loc
, init
);
9294 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9299 c_parser_error (parser
,
9300 "expected iteration declaration or initialization");
9301 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
9307 /* Parse the loop condition. */
9309 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
9311 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
9312 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
);
9314 cond
= cond_expr
.value
;
9315 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
9316 cond
= c_fully_fold (cond
, false, NULL
);
9317 switch (cond_expr
.original_code
)
9325 /* Can't be cond = error_mark_node, because we want to preserve
9326 the location until c_finish_omp_for. */
9327 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
9330 protected_set_expr_location (cond
, cond_loc
);
9332 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9334 /* Parse the increment expression. */
9336 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
9338 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
9340 incr
= c_process_expr_stmt (incr_loc
,
9341 c_parser_expression (parser
).value
);
9343 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9345 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
9349 TREE_VEC_ELT (declv
, i
) = decl
;
9350 TREE_VEC_ELT (initv
, i
) = init
;
9351 TREE_VEC_ELT (condv
, i
) = cond
;
9352 TREE_VEC_ELT (incrv
, i
) = incr
;
9356 if (i
== collapse
- 1)
9359 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
9360 in between the collapsed for loops to be still considered perfectly
9361 nested. Hopefully the final version clarifies this.
9362 For now handle (multiple) {'s and empty statements. */
9365 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9367 c_parser_consume_token (parser
);
9370 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
9372 c_parser_consume_token (parser
);
9376 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9377 c_parser_consume_token (parser
);
9380 c_parser_error (parser
, "not enough perfectly nested loops");
9383 open_brace_parsed
= true;
9393 nbraces
+= bracecount
;
9396 save_break
= c_break_label
;
9397 c_break_label
= size_one_node
;
9398 save_cont
= c_cont_label
;
9399 c_cont_label
= NULL_TREE
;
9400 body
= push_stmt_list ();
9402 if (open_brace_parsed
)
9404 location_t here
= c_parser_peek_token (parser
)->location
;
9405 stmt
= c_begin_compound_stmt (true);
9406 c_parser_compound_statement_nostart (parser
);
9407 add_stmt (c_end_compound_stmt (here
, stmt
, true));
9410 add_stmt (c_parser_c99_block_statement (parser
));
9413 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_cont_label
);
9414 SET_EXPR_LOCATION (t
, loc
);
9418 body
= pop_stmt_list (body
);
9419 c_break_label
= save_break
;
9420 c_cont_label
= save_cont
;
9424 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9426 c_parser_consume_token (parser
);
9429 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9430 c_parser_consume_token (parser
);
9433 c_parser_error (parser
, "collapsed loops not perfectly nested");
9436 location_t here
= c_parser_peek_token (parser
)->location
;
9437 stmt
= c_begin_compound_stmt (true);
9439 c_parser_compound_statement_nostart (parser
);
9440 body
= c_end_compound_stmt (here
, stmt
, true);
9447 /* Only bother calling c_finish_omp_for if we haven't already generated
9448 an error from the initialization parsing. */
9451 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
9454 if (par_clauses
!= NULL
)
9457 for (c
= par_clauses
; *c
; )
9458 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
9459 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
9460 c
= &OMP_CLAUSE_CHAIN (*c
);
9463 for (i
= 0; i
< collapse
; i
++)
9464 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
9467 c
= &OMP_CLAUSE_CHAIN (*c
);
9468 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
9471 "iteration variable %qD should not be firstprivate",
9472 OMP_CLAUSE_DECL (*c
));
9473 *c
= OMP_CLAUSE_CHAIN (*c
);
9477 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
9478 change it to shared (decl) in
9479 OMP_PARALLEL_CLAUSES. */
9480 tree l
= build_omp_clause (OMP_CLAUSE_LOCATION (*c
),
9481 OMP_CLAUSE_LASTPRIVATE
);
9482 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
9483 OMP_CLAUSE_CHAIN (l
) = clauses
;
9485 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
9489 OMP_FOR_CLAUSES (stmt
) = clauses
;
9494 while (!VEC_empty (tree
, for_block
))
9496 /* FIXME diagnostics: LOC below should be the actual location of
9497 this particular for block. We need to build a list of
9498 locations to go along with FOR_BLOCK. */
9499 stmt
= c_end_compound_stmt (loc
, VEC_pop (tree
, for_block
), true);
9502 release_tree_vector (for_block
);
9507 #pragma omp for for-clause[optseq] new-line
9510 LOC is the location of the #pragma token.
9513 #define OMP_FOR_CLAUSE_MASK \
9514 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9515 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9516 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9517 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9518 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
9519 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
9520 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
9521 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9524 c_parser_omp_for (location_t loc
, c_parser
*parser
)
9526 tree block
, clauses
, ret
;
9528 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
9531 block
= c_begin_compound_stmt (true);
9532 ret
= c_parser_omp_for_loop (loc
, parser
, clauses
, NULL
);
9533 block
= c_end_compound_stmt (loc
, block
, true);
9540 # pragma omp master new-line
9543 LOC is the location of the #pragma token.
9547 c_parser_omp_master (location_t loc
, c_parser
*parser
)
9549 c_parser_skip_to_pragma_eol (parser
);
9550 return c_finish_omp_master (loc
, c_parser_omp_structured_block (parser
));
9554 # pragma omp ordered new-line
9557 LOC is the location of the #pragma itself.
9561 c_parser_omp_ordered (location_t loc
, c_parser
*parser
)
9563 c_parser_skip_to_pragma_eol (parser
);
9564 return c_finish_omp_ordered (loc
, c_parser_omp_structured_block (parser
));
9570 { section-sequence }
9573 section-directive[opt] structured-block
9574 section-sequence section-directive structured-block
9576 SECTIONS_LOC is the location of the #pragma omp sections. */
9579 c_parser_omp_sections_scope (location_t sections_loc
, c_parser
*parser
)
9582 bool error_suppress
= false;
9585 loc
= c_parser_peek_token (parser
)->location
;
9586 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
9588 /* Avoid skipping until the end of the block. */
9589 parser
->error
= false;
9593 stmt
= push_stmt_list ();
9595 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
9597 substmt
= push_stmt_list ();
9601 c_parser_statement (parser
);
9603 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9605 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9607 if (c_parser_next_token_is (parser
, CPP_EOF
))
9611 substmt
= pop_stmt_list (substmt
);
9612 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9613 SET_EXPR_LOCATION (substmt
, loc
);
9619 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9621 if (c_parser_next_token_is (parser
, CPP_EOF
))
9624 loc
= c_parser_peek_token (parser
)->location
;
9625 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9627 c_parser_consume_pragma (parser
);
9628 c_parser_skip_to_pragma_eol (parser
);
9629 error_suppress
= false;
9631 else if (!error_suppress
)
9633 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
9634 error_suppress
= true;
9637 substmt
= c_parser_omp_structured_block (parser
);
9638 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9639 SET_EXPR_LOCATION (substmt
, loc
);
9642 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
9643 "expected %<#pragma omp section%> or %<}%>");
9645 substmt
= pop_stmt_list (stmt
);
9647 stmt
= make_node (OMP_SECTIONS
);
9648 SET_EXPR_LOCATION (stmt
, sections_loc
);
9649 TREE_TYPE (stmt
) = void_type_node
;
9650 OMP_SECTIONS_BODY (stmt
) = substmt
;
9652 return add_stmt (stmt
);
9656 # pragma omp sections sections-clause[optseq] newline
9659 LOC is the location of the #pragma token.
9662 #define OMP_SECTIONS_CLAUSE_MASK \
9663 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9664 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9665 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9666 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9667 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9670 c_parser_omp_sections (location_t loc
, c_parser
*parser
)
9672 tree block
, clauses
, ret
;
9674 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
9675 "#pragma omp sections");
9677 block
= c_begin_compound_stmt (true);
9678 ret
= c_parser_omp_sections_scope (loc
, parser
);
9680 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
9681 block
= c_end_compound_stmt (loc
, block
, true);
9688 # pragma parallel parallel-clause new-line
9689 # pragma parallel for parallel-for-clause new-line
9690 # pragma parallel sections parallel-sections-clause new-line
9692 LOC is the location of the #pragma token.
9695 #define OMP_PARALLEL_CLAUSE_MASK \
9696 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9697 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9698 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9699 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9700 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
9701 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
9702 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9703 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
9706 c_parser_omp_parallel (location_t loc
, c_parser
*parser
)
9708 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
9709 const char *p_name
= "#pragma omp parallel";
9710 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
9711 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
9713 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9715 c_parser_consume_token (parser
);
9716 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
9717 p_name
= "#pragma omp parallel for";
9718 mask
|= OMP_FOR_CLAUSE_MASK
;
9719 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9721 else if (c_parser_next_token_is (parser
, CPP_NAME
))
9723 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
9724 if (strcmp (p
, "sections") == 0)
9726 c_parser_consume_token (parser
);
9727 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
9728 p_name
= "#pragma omp parallel sections";
9729 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
9730 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9734 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
9738 case PRAGMA_OMP_PARALLEL
:
9739 block
= c_begin_omp_parallel ();
9740 c_parser_statement (parser
);
9741 stmt
= c_finish_omp_parallel (loc
, clauses
, block
);
9744 case PRAGMA_OMP_PARALLEL_FOR
:
9745 block
= c_begin_omp_parallel ();
9746 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9747 c_parser_omp_for_loop (loc
, parser
, ws_clause
, &par_clause
);
9748 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9749 OMP_PARALLEL_COMBINED (stmt
) = 1;
9752 case PRAGMA_OMP_PARALLEL_SECTIONS
:
9753 block
= c_begin_omp_parallel ();
9754 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9755 stmt
= c_parser_omp_sections_scope (loc
, parser
);
9757 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
9758 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9759 OMP_PARALLEL_COMBINED (stmt
) = 1;
9770 # pragma omp single single-clause[optseq] new-line
9773 LOC is the location of the #pragma.
9776 #define OMP_SINGLE_CLAUSE_MASK \
9777 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9778 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9779 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
9780 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9783 c_parser_omp_single (location_t loc
, c_parser
*parser
)
9785 tree stmt
= make_node (OMP_SINGLE
);
9786 SET_EXPR_LOCATION (stmt
, loc
);
9787 TREE_TYPE (stmt
) = void_type_node
;
9789 OMP_SINGLE_CLAUSES (stmt
)
9790 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
9791 "#pragma omp single");
9792 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
9794 return add_stmt (stmt
);
9798 # pragma omp task task-clause[optseq] new-line
9800 LOC is the location of the #pragma.
9803 #define OMP_TASK_CLAUSE_MASK \
9804 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9805 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
9806 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9807 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9808 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9809 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
9812 c_parser_omp_task (location_t loc
, c_parser
*parser
)
9814 tree clauses
, block
;
9816 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
9817 "#pragma omp task");
9819 block
= c_begin_omp_task ();
9820 c_parser_statement (parser
);
9821 return c_finish_omp_task (loc
, clauses
, block
);
9825 # pragma omp taskwait new-line
9829 c_parser_omp_taskwait (c_parser
*parser
)
9831 location_t loc
= c_parser_peek_token (parser
)->location
;
9832 c_parser_consume_pragma (parser
);
9833 c_parser_skip_to_pragma_eol (parser
);
9835 c_finish_omp_taskwait (loc
);
9838 /* Main entry point to parsing most OpenMP pragmas. */
9841 c_parser_omp_construct (c_parser
*parser
)
9843 enum pragma_kind p_kind
;
9847 loc
= c_parser_peek_token (parser
)->location
;
9848 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
9849 c_parser_consume_pragma (parser
);
9853 case PRAGMA_OMP_ATOMIC
:
9854 c_parser_omp_atomic (loc
, parser
);
9856 case PRAGMA_OMP_CRITICAL
:
9857 stmt
= c_parser_omp_critical (loc
, parser
);
9859 case PRAGMA_OMP_FOR
:
9860 stmt
= c_parser_omp_for (loc
, parser
);
9862 case PRAGMA_OMP_MASTER
:
9863 stmt
= c_parser_omp_master (loc
, parser
);
9865 case PRAGMA_OMP_ORDERED
:
9866 stmt
= c_parser_omp_ordered (loc
, parser
);
9868 case PRAGMA_OMP_PARALLEL
:
9869 stmt
= c_parser_omp_parallel (loc
, parser
);
9871 case PRAGMA_OMP_SECTIONS
:
9872 stmt
= c_parser_omp_sections (loc
, parser
);
9874 case PRAGMA_OMP_SINGLE
:
9875 stmt
= c_parser_omp_single (loc
, parser
);
9877 case PRAGMA_OMP_TASK
:
9878 stmt
= c_parser_omp_task (loc
, parser
);
9885 gcc_assert (EXPR_LOCATION (stmt
) != UNKNOWN_LOCATION
);
9890 # pragma omp threadprivate (variable-list) */
9893 c_parser_omp_threadprivate (c_parser
*parser
)
9898 c_parser_consume_pragma (parser
);
9899 loc
= c_parser_peek_token (parser
)->location
;
9900 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9902 /* Mark every variable in VARS to be assigned thread local storage. */
9903 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
9905 tree v
= TREE_PURPOSE (t
);
9907 /* FIXME diagnostics: Ideally we should keep individual
9908 locations for all the variables in the var list to make the
9909 following errors more precise. Perhaps
9910 c_parser_omp_var_list_parens() should construct a list of
9911 locations to go along with the var list. */
9913 /* If V had already been marked threadprivate, it doesn't matter
9914 whether it had been used prior to this point. */
9915 if (TREE_CODE (v
) != VAR_DECL
)
9916 error_at (loc
, "%qD is not a variable", v
);
9917 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
9918 error_at (loc
, "%qE declared %<threadprivate%> after first use", v
);
9919 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
9920 error_at (loc
, "automatic variable %qE cannot be %<threadprivate%>", v
);
9921 else if (TREE_TYPE (v
) == error_mark_node
)
9923 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
9924 error_at (loc
, "%<threadprivate%> %qE has incomplete type", v
);
9927 if (! DECL_THREAD_LOCAL_P (v
))
9929 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
9930 /* If rtl has been already set for this var, call
9931 make_decl_rtl once again, so that encode_section_info
9932 has a chance to look at the new decl flags. */
9933 if (DECL_RTL_SET_P (v
))
9936 C_DECL_THREADPRIVATE_P (v
) = 1;
9940 c_parser_skip_to_pragma_eol (parser
);
9944 /* Parse a single source file. */
9949 /* Use local storage to begin. If the first token is a pragma, parse it.
9950 If it is #pragma GCC pch_preprocess, then this will load a PCH file
9951 which will cause garbage collection. */
9954 memset (&tparser
, 0, sizeof tparser
);
9955 the_parser
= &tparser
;
9957 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
9958 c_parser_pragma_pch_preprocess (&tparser
);
9960 the_parser
= ggc_alloc_c_parser ();
9961 *the_parser
= tparser
;
9963 /* Initialize EH, if we've been told to do so. */
9964 if (flag_exceptions
)
9965 using_eh_for_cleanups ();
9967 c_parser_translation_unit (the_parser
);
9971 #include "gt-c-parser.h"