1 /* Parser for C and Objective-C.
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 Parser actions based on the old Bison parser; structure somewhat
7 influenced by and fragments based on the C++ parser.
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 3, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
27 Make sure all relevant comments, and all relevant code from all
28 actions, brought over from old parser. Verify exact correspondence
31 Add testcases covering every input symbol in every state in old and
34 Include full syntax for GNU C, including erroneous cases accepted
35 with error messages, in syntax productions in comments.
37 Make more diagnostics in the front end generally take an explicit
38 location rather than implicitly using input_location. */
42 #include "coretypes.h"
43 #include "tm.h" /* For rtl.h: needs enum reg_class. */
45 #include "langhooks.h"
49 #include "c-family/c-pragma.h"
54 #include "c-family/c-common.h"
55 #include "c-family/c-objc.h"
62 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
73 /* Make sure RID_MAX hasn't grown past the 8 bits used to hold the keyword in
74 the c_token structure. */
75 gcc_assert (RID_MAX
<= 255);
82 mask
|= D_ASM
| D_EXT
;
86 if (!c_dialect_objc ())
87 mask
|= D_OBJC
| D_CXX_OBJC
;
89 ridpointers
= ggc_alloc_cleared_vec_tree ((int) RID_MAX
);
90 for (i
= 0; i
< num_c_common_reswords
; i
++)
92 /* If a keyword is disabled, do not enter it into the table
93 and so create a canonical spelling that isn't a keyword. */
94 if (c_common_reswords
[i
].disable
& mask
)
97 && (c_common_reswords
[i
].disable
& D_CXXWARN
))
99 id
= get_identifier (c_common_reswords
[i
].word
);
100 C_SET_RID_CODE (id
, RID_CXX_COMPAT_WARN
);
101 C_IS_RESERVED_WORD (id
) = 1;
106 id
= get_identifier (c_common_reswords
[i
].word
);
107 C_SET_RID_CODE (id
, c_common_reswords
[i
].rid
);
108 C_IS_RESERVED_WORD (id
) = 1;
109 ridpointers
[(int) c_common_reswords
[i
].rid
] = id
;
113 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
114 and the C parser. Unlike the C++ lexer, the parser structure
115 stores the lexer information instead of using a separate structure.
116 Identifiers are separated into ordinary identifiers, type names,
117 keywords and some other Objective-C types of identifiers, and some
118 look-ahead is maintained.
120 ??? It might be a good idea to lex the whole file up front (as for
121 C++). It would then be possible to share more of the C and C++
122 lexer code, if desired. */
124 /* The following local token type is used. */
127 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
129 /* More information about the type of a CPP_NAME token. */
130 typedef enum c_id_kind
{
131 /* An ordinary identifier. */
133 /* An identifier declared as a typedef name. */
135 /* An identifier declared as an Objective-C class name. */
137 /* An address space identifier. */
139 /* Not an identifier. */
143 /* A single C token after string literal concatenation and conversion
144 of preprocessing tokens to tokens. */
145 typedef struct GTY (()) c_token
{
146 /* The kind of token. */
147 ENUM_BITFIELD (cpp_ttype
) type
: 8;
148 /* If this token is a CPP_NAME, this value indicates whether also
149 declared as some kind of type. Otherwise, it is C_ID_NONE. */
150 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
151 /* If this token is a keyword, this value indicates which keyword.
152 Otherwise, this value is RID_MAX. */
153 ENUM_BITFIELD (rid
) keyword
: 8;
154 /* If this token is a CPP_PRAGMA, this indicates the pragma that
155 was seen. Otherwise it is PRAGMA_NONE. */
156 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 8;
157 /* The location at which this token was found. */
159 /* The value associated with this token, if any. */
163 /* A parser structure recording information about the state and
164 context of parsing. Includes lexer information with up to two
165 tokens of look-ahead; more are not needed for C. */
166 typedef struct GTY(()) c_parser
{
167 /* The look-ahead tokens. */
169 /* How many look-ahead tokens are available (0, 1 or 2). */
171 /* True if a syntax error is being recovered from; false otherwise.
172 c_parser_error sets this flag. It should clear this flag when
173 enough tokens have been consumed to recover from the error. */
174 BOOL_BITFIELD error
: 1;
175 /* True if we're processing a pragma, and shouldn't automatically
176 consume CPP_PRAGMA_EOL. */
177 BOOL_BITFIELD in_pragma
: 1;
178 /* True if we're parsing the outermost block of an if statement. */
179 BOOL_BITFIELD in_if_block
: 1;
180 /* True if we want to lex an untranslated string. */
181 BOOL_BITFIELD lex_untranslated_string
: 1;
183 /* Objective-C specific parser/lexer information. */
185 /* True if we are in a context where the Objective-C "PQ" keywords
186 are considered keywords. */
187 BOOL_BITFIELD objc_pq_context
: 1;
188 /* True if we are parsing a (potential) Objective-C foreach
189 statement. This is set to true after we parsed 'for (' and while
190 we wait for 'in' or ';' to decide if it's a standard C for loop or an
191 Objective-C foreach loop. */
192 BOOL_BITFIELD objc_could_be_foreach_context
: 1;
193 /* The following flag is needed to contextualize Objective-C lexical
194 analysis. In some cases (e.g., 'int NSObject;'), it is
195 undesirable to bind an identifier to an Objective-C class, even
196 if a class with that name exists. */
197 BOOL_BITFIELD objc_need_raw_identifier
: 1;
198 /* True if we are in a context where the Objective-C "Property attribute"
199 keywords are valid. */
200 BOOL_BITFIELD objc_property_attr_context
: 1;
204 /* The actual parser and external interface. ??? Does this need to be
205 garbage-collected? */
207 static GTY (()) c_parser
*the_parser
;
209 /* Read in and lex a single token, storing it in *TOKEN. */
212 c_lex_one_token (c_parser
*parser
, c_token
*token
)
214 timevar_push (TV_LEX
);
216 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
,
217 (parser
->lex_untranslated_string
218 ? C_LEX_STRING_NO_TRANSLATE
: 0));
219 token
->id_kind
= C_ID_NONE
;
220 token
->keyword
= RID_MAX
;
221 token
->pragma_kind
= PRAGMA_NONE
;
229 bool objc_force_identifier
= parser
->objc_need_raw_identifier
;
230 if (c_dialect_objc ())
231 parser
->objc_need_raw_identifier
= false;
233 if (C_IS_RESERVED_WORD (token
->value
))
235 enum rid rid_code
= C_RID_CODE (token
->value
);
237 if (rid_code
== RID_CXX_COMPAT_WARN
)
239 warning_at (token
->location
,
241 "identifier %qE conflicts with C++ keyword",
244 else if (rid_code
>= RID_FIRST_ADDR_SPACE
245 && rid_code
<= RID_LAST_ADDR_SPACE
)
247 token
->id_kind
= C_ID_ADDRSPACE
;
248 token
->keyword
= rid_code
;
251 else if (c_dialect_objc () && OBJC_IS_PQ_KEYWORD (rid_code
))
253 /* We found an Objective-C "pq" keyword (in, out,
254 inout, bycopy, byref, oneway). They need special
255 care because the interpretation depends on the
257 if (parser
->objc_pq_context
)
259 token
->type
= CPP_KEYWORD
;
260 token
->keyword
= rid_code
;
263 else if (parser
->objc_could_be_foreach_context
264 && rid_code
== RID_IN
)
266 /* We are in Objective-C, inside a (potential)
267 foreach context (which means after having
268 parsed 'for (', but before having parsed ';'),
269 and we found 'in'. We consider it the keyword
270 which terminates the declaration at the
271 beginning of a foreach-statement. Note that
272 this means you can't use 'in' for anything else
273 in that context; in particular, in Objective-C
274 you can't use 'in' as the name of the running
275 variable in a C for loop. We could potentially
276 try to add code here to disambiguate, but it
277 seems a reasonable limitation. */
278 token
->type
= CPP_KEYWORD
;
279 token
->keyword
= rid_code
;
282 /* Else, "pq" keywords outside of the "pq" context are
283 not keywords, and we fall through to the code for
286 else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code
))
288 /* We found an Objective-C "property attribute"
289 keyword (getter, setter, readonly, etc). These are
290 only valid in the property context. */
291 if (parser
->objc_property_attr_context
)
293 token
->type
= CPP_KEYWORD
;
294 token
->keyword
= rid_code
;
297 /* Else they are not special keywords.
300 else if (c_dialect_objc ()
301 && (OBJC_IS_AT_KEYWORD (rid_code
)
302 || OBJC_IS_CXX_KEYWORD (rid_code
)))
304 /* We found one of the Objective-C "@" keywords (defs,
305 selector, synchronized, etc) or one of the
306 Objective-C "cxx" keywords (class, private,
307 protected, public, try, catch, throw) without a
308 preceding '@' sign. Do nothing and fall through to
309 the code for normal tokens (in C++ we would still
310 consider the CXX ones keywords, but not in C). */
315 token
->type
= CPP_KEYWORD
;
316 token
->keyword
= rid_code
;
321 decl
= lookup_name (token
->value
);
324 if (TREE_CODE (decl
) == TYPE_DECL
)
326 token
->id_kind
= C_ID_TYPENAME
;
330 else if (c_dialect_objc ())
332 tree objc_interface_decl
= objc_is_class_name (token
->value
);
333 /* Objective-C class names are in the same namespace as
334 variables and typedefs, and hence are shadowed by local
336 if (objc_interface_decl
337 && (!objc_force_identifier
|| global_bindings_p ()))
339 token
->value
= objc_interface_decl
;
340 token
->id_kind
= C_ID_CLASSNAME
;
344 token
->id_kind
= C_ID_ID
;
348 /* This only happens in Objective-C; it must be a keyword. */
349 token
->type
= CPP_KEYWORD
;
350 switch (C_RID_CODE (token
->value
))
352 /* Replace 'class' with '@class', 'private' with '@private',
353 etc. This prevents confusion with the C++ keyword
354 'class', and makes the tokens consistent with other
355 Objective-C 'AT' keywords. For example '@class' is
356 reported as RID_AT_CLASS which is consistent with
357 '@synchronized', which is reported as
360 case RID_CLASS
: token
->keyword
= RID_AT_CLASS
; break;
361 case RID_PRIVATE
: token
->keyword
= RID_AT_PRIVATE
; break;
362 case RID_PROTECTED
: token
->keyword
= RID_AT_PROTECTED
; break;
363 case RID_PUBLIC
: token
->keyword
= RID_AT_PUBLIC
; break;
364 case RID_THROW
: token
->keyword
= RID_AT_THROW
; break;
365 case RID_TRY
: token
->keyword
= RID_AT_TRY
; break;
366 case RID_CATCH
: token
->keyword
= RID_AT_CATCH
; break;
367 default: token
->keyword
= C_RID_CODE (token
->value
);
372 case CPP_CLOSE_PAREN
:
374 /* These tokens may affect the interpretation of any identifiers
375 following, if doing Objective-C. */
376 if (c_dialect_objc ())
377 parser
->objc_need_raw_identifier
= false;
380 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
381 token
->pragma_kind
= (enum pragma_kind
) TREE_INT_CST_LOW (token
->value
);
387 timevar_pop (TV_LEX
);
390 /* Return a pointer to the next token from PARSER, reading it in if
393 static inline c_token
*
394 c_parser_peek_token (c_parser
*parser
)
396 if (parser
->tokens_avail
== 0)
398 c_lex_one_token (parser
, &parser
->tokens
[0]);
399 parser
->tokens_avail
= 1;
401 return &parser
->tokens
[0];
404 /* Return true if the next token from PARSER has the indicated
408 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
410 return c_parser_peek_token (parser
)->type
== type
;
413 /* Return true if the next token from PARSER does not have the
417 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
419 return !c_parser_next_token_is (parser
, type
);
422 /* Return true if the next token from PARSER is the indicated
426 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
428 return c_parser_peek_token (parser
)->keyword
== keyword
;
431 /* Return a pointer to the next-but-one token from PARSER, reading it
432 in if necessary. The next token is already read in. */
435 c_parser_peek_2nd_token (c_parser
*parser
)
437 if (parser
->tokens_avail
>= 2)
438 return &parser
->tokens
[1];
439 gcc_assert (parser
->tokens_avail
== 1);
440 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
441 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
442 c_lex_one_token (parser
, &parser
->tokens
[1]);
443 parser
->tokens_avail
= 2;
444 return &parser
->tokens
[1];
447 /* Return true if TOKEN can start a type name,
450 c_token_starts_typename (c_token
*token
)
455 switch (token
->id_kind
)
464 gcc_assert (c_dialect_objc ());
470 switch (token
->keyword
)
503 if (c_dialect_objc ())
511 enum c_lookahead_kind
{
512 /* Always treat unknown identifiers as typenames. */
515 /* Could be parsing a nonabstract declarator. Only treat an identifier
516 as a typename if followed by another identifier or a star. */
517 cla_nonabstract_decl
,
519 /* Never treat identifiers as typenames. */
523 /* Return true if the next token from PARSER can start a type name,
524 false otherwise. LA specifies how to do lookahead in order to
525 detect unknown type names. If unsure, pick CLA_PREFER_ID. */
528 c_parser_next_tokens_start_typename (c_parser
*parser
, enum c_lookahead_kind la
)
530 c_token
*token
= c_parser_peek_token (parser
);
531 if (c_token_starts_typename (token
))
534 /* Try a bit harder to detect an unknown typename. */
535 if (la
!= cla_prefer_id
536 && token
->type
== CPP_NAME
537 && token
->id_kind
== C_ID_ID
539 /* Do not try too hard when we could have "object in array". */
540 && !parser
->objc_could_be_foreach_context
542 && (la
== cla_prefer_type
543 || c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
544 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
546 /* Only unknown identifiers. */
547 && !lookup_name (token
->value
))
553 /* Return true if TOKEN is a type qualifier, false otherwise. */
555 c_token_is_qualifier (c_token
*token
)
560 switch (token
->id_kind
)
568 switch (token
->keyword
)
585 /* Return true if the next token from PARSER is a type qualifier,
588 c_parser_next_token_is_qualifier (c_parser
*parser
)
590 c_token
*token
= c_parser_peek_token (parser
);
591 return c_token_is_qualifier (token
);
594 /* Return true if TOKEN can start declaration specifiers, false
597 c_token_starts_declspecs (c_token
*token
)
602 switch (token
->id_kind
)
611 gcc_assert (c_dialect_objc ());
617 switch (token
->keyword
)
657 if (c_dialect_objc ())
666 /* Return true if TOKEN can start declaration specifiers or a static
667 assertion, false otherwise. */
669 c_token_starts_declaration (c_token
*token
)
671 if (c_token_starts_declspecs (token
)
672 || token
->keyword
== RID_STATIC_ASSERT
)
678 /* Return true if the next token from PARSER can start declaration
679 specifiers, false otherwise. */
681 c_parser_next_token_starts_declspecs (c_parser
*parser
)
683 c_token
*token
= c_parser_peek_token (parser
);
685 /* In Objective-C, a classname normally starts a declspecs unless it
686 is immediately followed by a dot. In that case, it is the
687 Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
688 setter/getter on the class. c_token_starts_declspecs() can't
689 differentiate between the two cases because it only checks the
690 current token, so we have a special check here. */
691 if (c_dialect_objc ()
692 && token
->type
== CPP_NAME
693 && token
->id_kind
== C_ID_CLASSNAME
694 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
697 return c_token_starts_declspecs (token
);
700 /* Return true if the next tokens from PARSER can start declaration
701 specifiers or a static assertion, false otherwise. */
703 c_parser_next_tokens_start_declaration (c_parser
*parser
)
705 c_token
*token
= c_parser_peek_token (parser
);
708 if (c_dialect_objc ()
709 && token
->type
== CPP_NAME
710 && token
->id_kind
== C_ID_CLASSNAME
711 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
714 /* Labels do not start declarations. */
715 if (token
->type
== CPP_NAME
716 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
719 if (c_token_starts_declaration (token
))
722 if (c_parser_next_tokens_start_typename (parser
, cla_nonabstract_decl
))
728 /* Consume the next token from PARSER. */
731 c_parser_consume_token (c_parser
*parser
)
733 gcc_assert (parser
->tokens_avail
>= 1);
734 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
735 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
736 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
737 if (parser
->tokens_avail
== 2)
738 parser
->tokens
[0] = parser
->tokens
[1];
739 parser
->tokens_avail
--;
742 /* Expect the current token to be a #pragma. Consume it and remember
743 that we've begun parsing a pragma. */
746 c_parser_consume_pragma (c_parser
*parser
)
748 gcc_assert (!parser
->in_pragma
);
749 gcc_assert (parser
->tokens_avail
>= 1);
750 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
751 if (parser
->tokens_avail
== 2)
752 parser
->tokens
[0] = parser
->tokens
[1];
753 parser
->tokens_avail
--;
754 parser
->in_pragma
= true;
757 /* Update the globals input_location and in_system_header from
760 c_parser_set_source_position_from_token (c_token
*token
)
762 if (token
->type
!= CPP_EOF
)
764 input_location
= token
->location
;
768 /* Issue a diagnostic of the form
769 FILE:LINE: MESSAGE before TOKEN
770 where TOKEN is the next token in the input stream of PARSER.
771 MESSAGE (specified by the caller) is usually of the form "expected
774 Do not issue a diagnostic if still recovering from an error.
776 ??? This is taken from the C++ parser, but building up messages in
777 this way is not i18n-friendly and some other approach should be
781 c_parser_error (c_parser
*parser
, const char *gmsgid
)
783 c_token
*token
= c_parser_peek_token (parser
);
786 parser
->error
= true;
789 /* This diagnostic makes more sense if it is tagged to the line of
790 the token we just peeked at. */
791 c_parser_set_source_position_from_token (token
);
792 c_parse_error (gmsgid
,
793 /* Because c_parse_error does not understand
794 CPP_KEYWORD, keywords are treated like
796 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
797 /* ??? The C parser does not save the cpp flags of a
798 token, we need to pass 0 here and we will not get
799 the source spelling of some tokens but rather the
800 canonical spelling. */
801 token
->value
, /*flags=*/0);
804 /* If the next token is of the indicated TYPE, consume it. Otherwise,
805 issue the error MSGID. If MSGID is NULL then a message has already
806 been produced and no message will be produced this time. Returns
807 true if found, false otherwise. */
810 c_parser_require (c_parser
*parser
,
814 if (c_parser_next_token_is (parser
, type
))
816 c_parser_consume_token (parser
);
821 c_parser_error (parser
, msgid
);
826 /* If the next token is the indicated keyword, consume it. Otherwise,
827 issue the error MSGID. Returns true if found, false otherwise. */
830 c_parser_require_keyword (c_parser
*parser
,
834 if (c_parser_next_token_is_keyword (parser
, keyword
))
836 c_parser_consume_token (parser
);
841 c_parser_error (parser
, msgid
);
846 /* Like c_parser_require, except that tokens will be skipped until the
847 desired token is found. An error message is still produced if the
848 next token is not as expected. If MSGID is NULL then a message has
849 already been produced and no message will be produced this
853 c_parser_skip_until_found (c_parser
*parser
,
857 unsigned nesting_depth
= 0;
859 if (c_parser_require (parser
, type
, msgid
))
862 /* Skip tokens until the desired token is found. */
865 /* Peek at the next token. */
866 c_token
*token
= c_parser_peek_token (parser
);
867 /* If we've reached the token we want, consume it and stop. */
868 if (token
->type
== type
&& !nesting_depth
)
870 c_parser_consume_token (parser
);
874 /* If we've run out of tokens, stop. */
875 if (token
->type
== CPP_EOF
)
877 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
879 if (token
->type
== CPP_OPEN_BRACE
880 || token
->type
== CPP_OPEN_PAREN
881 || token
->type
== CPP_OPEN_SQUARE
)
883 else if (token
->type
== CPP_CLOSE_BRACE
884 || token
->type
== CPP_CLOSE_PAREN
885 || token
->type
== CPP_CLOSE_SQUARE
)
887 if (nesting_depth
-- == 0)
890 /* Consume this token. */
891 c_parser_consume_token (parser
);
893 parser
->error
= false;
896 /* Skip tokens until the end of a parameter is found, but do not
897 consume the comma, semicolon or closing delimiter. */
900 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
902 unsigned nesting_depth
= 0;
906 c_token
*token
= c_parser_peek_token (parser
);
907 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
910 /* If we've run out of tokens, stop. */
911 if (token
->type
== CPP_EOF
)
913 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
915 if (token
->type
== CPP_OPEN_BRACE
916 || token
->type
== CPP_OPEN_PAREN
917 || token
->type
== CPP_OPEN_SQUARE
)
919 else if (token
->type
== CPP_CLOSE_BRACE
920 || token
->type
== CPP_CLOSE_PAREN
921 || token
->type
== CPP_CLOSE_SQUARE
)
923 if (nesting_depth
-- == 0)
926 /* Consume this token. */
927 c_parser_consume_token (parser
);
929 parser
->error
= false;
932 /* Expect to be at the end of the pragma directive and consume an
933 end of line marker. */
936 c_parser_skip_to_pragma_eol (c_parser
*parser
)
938 gcc_assert (parser
->in_pragma
);
939 parser
->in_pragma
= false;
941 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
944 c_token
*token
= c_parser_peek_token (parser
);
945 if (token
->type
== CPP_EOF
)
947 if (token
->type
== CPP_PRAGMA_EOL
)
949 c_parser_consume_token (parser
);
952 c_parser_consume_token (parser
);
955 parser
->error
= false;
958 /* Skip tokens until we have consumed an entire block, or until we
959 have consumed a non-nested ';'. */
962 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
964 unsigned nesting_depth
= 0;
965 bool save_error
= parser
->error
;
971 /* Peek at the next token. */
972 token
= c_parser_peek_token (parser
);
980 if (parser
->in_pragma
)
985 /* If the next token is a ';', we have reached the
986 end of the statement. */
989 /* Consume the ';'. */
990 c_parser_consume_token (parser
);
995 case CPP_CLOSE_BRACE
:
996 /* If the next token is a non-nested '}', then we have
997 reached the end of the current block. */
998 if (nesting_depth
== 0 || --nesting_depth
== 0)
1000 c_parser_consume_token (parser
);
1005 case CPP_OPEN_BRACE
:
1006 /* If it the next token is a '{', then we are entering a new
1007 block. Consume the entire block. */
1012 /* If we see a pragma, consume the whole thing at once. We
1013 have some safeguards against consuming pragmas willy-nilly.
1014 Normally, we'd expect to be here with parser->error set,
1015 which disables these safeguards. But it's possible to get
1016 here for secondary error recovery, after parser->error has
1018 c_parser_consume_pragma (parser
);
1019 c_parser_skip_to_pragma_eol (parser
);
1020 parser
->error
= save_error
;
1027 c_parser_consume_token (parser
);
1031 parser
->error
= false;
1034 /* CPP's options (initialized by c-opts.c). */
1035 extern cpp_options
*cpp_opts
;
1037 /* Save the warning flags which are controlled by __extension__. */
1040 disable_extension_diagnostics (void)
1043 | (warn_pointer_arith
<< 1)
1044 | (warn_traditional
<< 2)
1046 | (warn_long_long
<< 4)
1047 | (warn_cxx_compat
<< 5)
1048 | (warn_overlength_strings
<< 6));
1049 cpp_opts
->cpp_pedantic
= pedantic
= 0;
1050 warn_pointer_arith
= 0;
1051 cpp_opts
->cpp_warn_traditional
= warn_traditional
= 0;
1053 cpp_opts
->cpp_warn_long_long
= warn_long_long
= 0;
1054 warn_cxx_compat
= 0;
1055 warn_overlength_strings
= 0;
1059 /* Restore the warning flags which are controlled by __extension__.
1060 FLAGS is the return value from disable_extension_diagnostics. */
1063 restore_extension_diagnostics (int flags
)
1065 cpp_opts
->cpp_pedantic
= pedantic
= flags
& 1;
1066 warn_pointer_arith
= (flags
>> 1) & 1;
1067 cpp_opts
->cpp_warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
1068 flag_iso
= (flags
>> 3) & 1;
1069 cpp_opts
->cpp_warn_long_long
= warn_long_long
= (flags
>> 4) & 1;
1070 warn_cxx_compat
= (flags
>> 5) & 1;
1071 warn_overlength_strings
= (flags
>> 6) & 1;
1074 /* Possibly kinds of declarator to parse. */
1075 typedef enum c_dtr_syn
{
1076 /* A normal declarator with an identifier. */
1078 /* An abstract declarator (maybe empty). */
1080 /* A parameter declarator: may be either, but after a type name does
1081 not redeclare a typedef name as an identifier if it can
1082 alternatively be interpreted as a typedef name; see DR#009,
1083 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
1084 following DR#249. For example, given a typedef T, "int T" and
1085 "int *T" are valid parameter declarations redeclaring T, while
1086 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
1087 abstract declarators rather than involving redundant parentheses;
1088 the same applies with attributes inside the parentheses before
1093 static void c_parser_external_declaration (c_parser
*);
1094 static void c_parser_asm_definition (c_parser
*);
1095 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool,
1096 bool, bool, tree
*);
1097 static void c_parser_static_assert_declaration_no_semi (c_parser
*);
1098 static void c_parser_static_assert_declaration (c_parser
*);
1099 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
1100 bool, enum c_lookahead_kind
);
1101 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
1102 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
1103 static tree
c_parser_struct_declaration (c_parser
*);
1104 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
1105 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
1107 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
1109 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
1111 struct c_declarator
*);
1112 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
1113 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
1114 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
1115 static tree
c_parser_simple_asm_expr (c_parser
*);
1116 static tree
c_parser_attributes (c_parser
*);
1117 static struct c_type_name
*c_parser_type_name (c_parser
*);
1118 static struct c_expr
c_parser_initializer (c_parser
*);
1119 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1120 static void c_parser_initelt (c_parser
*, struct obstack
*);
1121 static void c_parser_initval (c_parser
*, struct c_expr
*,
1123 static tree
c_parser_compound_statement (c_parser
*);
1124 static void c_parser_compound_statement_nostart (c_parser
*);
1125 static void c_parser_label (c_parser
*);
1126 static void c_parser_statement (c_parser
*);
1127 static void c_parser_statement_after_labels (c_parser
*);
1128 static void c_parser_if_statement (c_parser
*);
1129 static void c_parser_switch_statement (c_parser
*);
1130 static void c_parser_while_statement (c_parser
*);
1131 static void c_parser_do_statement (c_parser
*);
1132 static void c_parser_for_statement (c_parser
*);
1133 static tree
c_parser_asm_statement (c_parser
*);
1134 static tree
c_parser_asm_operands (c_parser
*, bool);
1135 static tree
c_parser_asm_goto_operands (c_parser
*);
1136 static tree
c_parser_asm_clobbers (c_parser
*);
1137 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1138 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1140 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1141 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1142 static struct c_expr
c_parser_unary_expression (c_parser
*);
1143 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1144 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1145 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1146 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1147 struct c_type_name
*,
1149 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1152 static struct c_expr
c_parser_expression (c_parser
*);
1153 static struct c_expr
c_parser_expression_conv (c_parser
*);
1154 static VEC(tree
,gc
) *c_parser_expr_list (c_parser
*, bool, bool,
1156 static void c_parser_omp_construct (c_parser
*);
1157 static void c_parser_omp_threadprivate (c_parser
*);
1158 static void c_parser_omp_barrier (c_parser
*);
1159 static void c_parser_omp_flush (c_parser
*);
1160 static void c_parser_omp_taskwait (c_parser
*);
1162 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1163 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1165 /* These Objective-C parser functions are only ever called when
1166 compiling Objective-C. */
1167 static void c_parser_objc_class_definition (c_parser
*, tree
);
1168 static void c_parser_objc_class_instance_variables (c_parser
*);
1169 static void c_parser_objc_class_declaration (c_parser
*);
1170 static void c_parser_objc_alias_declaration (c_parser
*);
1171 static void c_parser_objc_protocol_definition (c_parser
*, tree
);
1172 static bool c_parser_objc_method_type (c_parser
*);
1173 static void c_parser_objc_method_definition (c_parser
*);
1174 static void c_parser_objc_methodprotolist (c_parser
*);
1175 static void c_parser_objc_methodproto (c_parser
*);
1176 static tree
c_parser_objc_method_decl (c_parser
*, bool, tree
*);
1177 static tree
c_parser_objc_type_name (c_parser
*);
1178 static tree
c_parser_objc_protocol_refs (c_parser
*);
1179 static void c_parser_objc_try_catch_finally_statement (c_parser
*);
1180 static void c_parser_objc_synchronized_statement (c_parser
*);
1181 static tree
c_parser_objc_selector (c_parser
*);
1182 static tree
c_parser_objc_selector_arg (c_parser
*);
1183 static tree
c_parser_objc_receiver (c_parser
*);
1184 static tree
c_parser_objc_message_args (c_parser
*);
1185 static tree
c_parser_objc_keywordexpr (c_parser
*);
1186 static void c_parser_objc_at_property_declaration (c_parser
*);
1187 static void c_parser_objc_at_synthesize_declaration (c_parser
*);
1188 static void c_parser_objc_at_dynamic_declaration (c_parser
*);
1189 static bool c_parser_objc_diagnose_bad_element_prefix
1190 (c_parser
*, struct c_declspecs
*);
1192 /* Parse a translation unit (C90 6.7, C99 6.9).
1195 external-declarations
1197 external-declarations:
1198 external-declaration
1199 external-declarations external-declaration
1208 c_parser_translation_unit (c_parser
*parser
)
1210 if (c_parser_next_token_is (parser
, CPP_EOF
))
1212 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1213 "ISO C forbids an empty translation unit");
1217 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1218 mark_valid_location_for_stdc_pragma (false);
1222 c_parser_external_declaration (parser
);
1223 obstack_free (&parser_obstack
, obstack_position
);
1225 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1229 /* Parse an external declaration (C90 6.7, C99 6.9).
1231 external-declaration:
1237 external-declaration:
1240 __extension__ external-declaration
1244 external-declaration:
1245 objc-class-definition
1246 objc-class-declaration
1247 objc-alias-declaration
1248 objc-protocol-definition
1249 objc-method-definition
1254 c_parser_external_declaration (c_parser
*parser
)
1257 switch (c_parser_peek_token (parser
)->type
)
1260 switch (c_parser_peek_token (parser
)->keyword
)
1263 ext
= disable_extension_diagnostics ();
1264 c_parser_consume_token (parser
);
1265 c_parser_external_declaration (parser
);
1266 restore_extension_diagnostics (ext
);
1269 c_parser_asm_definition (parser
);
1271 case RID_AT_INTERFACE
:
1272 case RID_AT_IMPLEMENTATION
:
1273 gcc_assert (c_dialect_objc ());
1274 c_parser_objc_class_definition (parser
, NULL_TREE
);
1277 gcc_assert (c_dialect_objc ());
1278 c_parser_objc_class_declaration (parser
);
1281 gcc_assert (c_dialect_objc ());
1282 c_parser_objc_alias_declaration (parser
);
1284 case RID_AT_PROTOCOL
:
1285 gcc_assert (c_dialect_objc ());
1286 c_parser_objc_protocol_definition (parser
, NULL_TREE
);
1288 case RID_AT_PROPERTY
:
1289 gcc_assert (c_dialect_objc ());
1290 c_parser_objc_at_property_declaration (parser
);
1292 case RID_AT_SYNTHESIZE
:
1293 gcc_assert (c_dialect_objc ());
1294 c_parser_objc_at_synthesize_declaration (parser
);
1296 case RID_AT_DYNAMIC
:
1297 gcc_assert (c_dialect_objc ());
1298 c_parser_objc_at_dynamic_declaration (parser
);
1301 gcc_assert (c_dialect_objc ());
1302 c_parser_consume_token (parser
);
1303 objc_finish_implementation ();
1310 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1311 "ISO C does not allow extra %<;%> outside of a function");
1312 c_parser_consume_token (parser
);
1315 mark_valid_location_for_stdc_pragma (true);
1316 c_parser_pragma (parser
, pragma_external
);
1317 mark_valid_location_for_stdc_pragma (false);
1321 if (c_dialect_objc ())
1323 c_parser_objc_method_definition (parser
);
1326 /* Else fall through, and yield a syntax error trying to parse
1327 as a declaration or function definition. */
1330 /* A declaration or a function definition (or, in Objective-C,
1331 an @interface or @protocol with prefix attributes). We can
1332 only tell which after parsing the declaration specifiers, if
1333 any, and the first declarator. */
1334 c_parser_declaration_or_fndef (parser
, true, true, true, false, true, NULL
);
1339 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1340 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1341 accepted; otherwise (old-style parameter declarations) only other
1342 declarations are accepted. If STATIC_ASSERT_OK is true, a static
1343 assertion is accepted; otherwise (old-style parameter declarations)
1344 it is not. If NESTED is true, we are inside a function or parsing
1345 old-style parameter declarations; any functions encountered are
1346 nested functions and declaration specifiers are required; otherwise
1347 we are at top level and functions are normal functions and
1348 declaration specifiers may be optional. If EMPTY_OK is true, empty
1349 declarations are OK (subject to all other constraints); otherwise
1350 (old-style parameter declarations) they are diagnosed. If
1351 START_ATTR_OK is true, the declaration specifiers may start with
1352 attributes; otherwise they may not.
1353 OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed
1354 declaration when parsing an Objective-C foreach statement.
1357 declaration-specifiers init-declarator-list[opt] ;
1358 static_assert-declaration
1360 function-definition:
1361 declaration-specifiers[opt] declarator declaration-list[opt]
1366 declaration-list declaration
1368 init-declarator-list:
1370 init-declarator-list , init-declarator
1373 declarator simple-asm-expr[opt] attributes[opt]
1374 declarator simple-asm-expr[opt] attributes[opt] = initializer
1378 nested-function-definition:
1379 declaration-specifiers declarator declaration-list[opt]
1383 attributes objc-class-definition
1384 attributes objc-category-definition
1385 attributes objc-protocol-definition
1387 The simple-asm-expr and attributes are GNU extensions.
1389 This function does not handle __extension__; that is handled in its
1390 callers. ??? Following the old parser, __extension__ may start
1391 external declarations, declarations in functions and declarations
1392 at the start of "for" loops, but not old-style parameter
1395 C99 requires declaration specifiers in a function definition; the
1396 absence is diagnosed through the diagnosis of implicit int. In GNU
1397 C we also allow but diagnose declarations without declaration
1398 specifiers, but only at top level (elsewhere they conflict with
1401 In Objective-C, declarations of the looping variable in a foreach
1402 statement are exceptionally terminated by 'in' (for example, 'for
1403 (NSObject *object in array) { ... }').
1408 threadprivate-directive */
1411 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
,
1412 bool static_assert_ok
, bool empty_ok
,
1413 bool nested
, bool start_attr_ok
,
1414 tree
*objc_foreach_object_declaration
)
1416 struct c_declspecs
*specs
;
1418 tree all_prefix_attrs
;
1419 bool diagnosed_no_specs
= false;
1420 location_t here
= c_parser_peek_token (parser
)->location
;
1422 if (static_assert_ok
1423 && c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
1425 c_parser_static_assert_declaration (parser
);
1428 specs
= build_null_declspecs ();
1430 /* Try to detect an unknown type name when we have "A B" or "A *B". */
1431 if (c_parser_peek_token (parser
)->type
== CPP_NAME
1432 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
1433 && (c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
1434 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
1435 && (!nested
|| !lookup_name (c_parser_peek_token (parser
)->value
)))
1437 error_at (here
, "unknown type name %qE",
1438 c_parser_peek_token (parser
)->value
);
1440 /* Parse declspecs normally to get a correct pointer type, but avoid
1441 a further "fails to be a type name" error. Refuse nested functions
1442 since it is not how the user likely wants us to recover. */
1443 c_parser_peek_token (parser
)->type
= CPP_KEYWORD
;
1444 c_parser_peek_token (parser
)->keyword
= RID_VOID
;
1445 c_parser_peek_token (parser
)->value
= error_mark_node
;
1449 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
, cla_nonabstract_decl
);
1452 c_parser_skip_to_end_of_block_or_statement (parser
);
1455 if (nested
&& !specs
->declspecs_seen_p
)
1457 c_parser_error (parser
, "expected declaration specifiers");
1458 c_parser_skip_to_end_of_block_or_statement (parser
);
1461 finish_declspecs (specs
);
1462 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1468 shadow_tag_warned (specs
, 1);
1469 pedwarn (here
, 0, "empty declaration");
1471 c_parser_consume_token (parser
);
1475 /* Provide better error recovery. Note that a type name here is usually
1476 better diagnosed as a redeclaration. */
1478 && specs
->typespec_kind
== ctsk_tagdef
1479 && c_parser_next_token_starts_declspecs (parser
)
1480 && !c_parser_next_token_is (parser
, CPP_NAME
))
1482 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
1483 parser
->error
= false;
1484 shadow_tag_warned (specs
, 1);
1487 else if (c_dialect_objc ())
1489 /* Prefix attributes are an error on method decls. */
1490 switch (c_parser_peek_token (parser
)->type
)
1494 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1498 warning_at (c_parser_peek_token (parser
)->location
,
1500 "prefix attributes are ignored for methods");
1501 specs
->attrs
= NULL_TREE
;
1504 c_parser_objc_method_definition (parser
);
1506 c_parser_objc_methodproto (parser
);
1512 /* This is where we parse 'attributes @interface ...',
1513 'attributes @implementation ...', 'attributes @protocol ...'
1514 (where attributes could be, for example, __attribute__
1517 switch (c_parser_peek_token (parser
)->keyword
)
1519 case RID_AT_INTERFACE
:
1521 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1523 c_parser_objc_class_definition (parser
, specs
->attrs
);
1527 case RID_AT_IMPLEMENTATION
:
1529 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1533 warning_at (c_parser_peek_token (parser
)->location
,
1535 "prefix attributes are ignored for implementations");
1536 specs
->attrs
= NULL_TREE
;
1538 c_parser_objc_class_definition (parser
, NULL_TREE
);
1542 case RID_AT_PROTOCOL
:
1544 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1546 c_parser_objc_protocol_definition (parser
, specs
->attrs
);
1553 case RID_AT_PROPERTY
:
1556 c_parser_error (parser
, "unexpected attribute");
1557 specs
->attrs
= NULL
;
1565 pending_xref_error ();
1566 prefix_attrs
= specs
->attrs
;
1567 all_prefix_attrs
= prefix_attrs
;
1568 specs
->attrs
= NULL_TREE
;
1571 struct c_declarator
*declarator
;
1574 /* Declaring either one or more declarators (in which case we
1575 should diagnose if there were no declaration specifiers) or a
1576 function definition (in which case the diagnostic for
1577 implicit int suffices). */
1578 declarator
= c_parser_declarator (parser
,
1579 specs
->typespec_kind
!= ctsk_none
,
1580 C_DTR_NORMAL
, &dummy
);
1581 if (declarator
== NULL
)
1583 c_parser_skip_to_end_of_block_or_statement (parser
);
1586 if (c_parser_next_token_is (parser
, CPP_EQ
)
1587 || c_parser_next_token_is (parser
, CPP_COMMA
)
1588 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1589 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1590 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
)
1591 || c_parser_next_token_is_keyword (parser
, RID_IN
))
1593 tree asm_name
= NULL_TREE
;
1594 tree postfix_attrs
= NULL_TREE
;
1595 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1597 diagnosed_no_specs
= true;
1598 pedwarn (here
, 0, "data definition has no type or storage class");
1600 /* Having seen a data definition, there cannot now be a
1601 function definition. */
1603 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1604 asm_name
= c_parser_simple_asm_expr (parser
);
1605 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1606 postfix_attrs
= c_parser_attributes (parser
);
1607 if (c_parser_next_token_is (parser
, CPP_EQ
))
1611 location_t init_loc
;
1612 c_parser_consume_token (parser
);
1613 /* The declaration of the variable is in effect while
1614 its initializer is parsed. */
1615 d
= start_decl (declarator
, specs
, true,
1616 chainon (postfix_attrs
, all_prefix_attrs
));
1618 d
= error_mark_node
;
1619 start_init (d
, asm_name
, global_bindings_p ());
1620 init_loc
= c_parser_peek_token (parser
)->location
;
1621 init
= c_parser_initializer (parser
);
1623 if (d
!= error_mark_node
)
1625 maybe_warn_string_init (TREE_TYPE (d
), init
);
1626 finish_decl (d
, init_loc
, init
.value
,
1627 init
.original_type
, asm_name
);
1632 tree d
= start_decl (declarator
, specs
, false,
1633 chainon (postfix_attrs
,
1636 finish_decl (d
, UNKNOWN_LOCATION
, NULL_TREE
,
1637 NULL_TREE
, asm_name
);
1639 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1642 *objc_foreach_object_declaration
= d
;
1644 *objc_foreach_object_declaration
= error_mark_node
;
1647 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1649 c_parser_consume_token (parser
);
1650 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1651 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1654 all_prefix_attrs
= prefix_attrs
;
1657 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1659 c_parser_consume_token (parser
);
1662 else if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1664 /* This can only happen in Objective-C: we found the
1665 'in' that terminates the declaration inside an
1666 Objective-C foreach statement. Do not consume the
1667 token, so that the caller can use it to determine
1668 that this indeed is a foreach context. */
1673 c_parser_error (parser
, "expected %<,%> or %<;%>");
1674 c_parser_skip_to_end_of_block_or_statement (parser
);
1680 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1681 "%<asm%> or %<__attribute__%>");
1682 c_parser_skip_to_end_of_block_or_statement (parser
);
1685 /* Function definition (nested or otherwise). */
1688 pedwarn (here
, OPT_pedantic
, "ISO C forbids nested functions");
1689 c_push_function_context ();
1691 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1693 /* This can appear in many cases looking nothing like a
1694 function definition, so we don't give a more specific
1695 error suggesting there was one. */
1696 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1697 "or %<__attribute__%>");
1699 c_pop_function_context ();
1702 /* Parse old-style parameter declarations. ??? Attributes are
1703 not allowed to start declaration specifiers here because of a
1704 syntax conflict between a function declaration with attribute
1705 suffix and a function definition with an attribute prefix on
1706 first old-style parameter declaration. Following the old
1707 parser, they are not accepted on subsequent old-style
1708 parameter declarations either. However, there is no
1709 ambiguity after the first declaration, nor indeed on the
1710 first as long as we don't allow postfix attributes after a
1711 declarator with a nonempty identifier list in a definition;
1712 and postfix attributes have never been accepted here in
1713 function definitions either. */
1714 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1715 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1716 c_parser_declaration_or_fndef (parser
, false, false, false,
1718 store_parm_decls ();
1719 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1720 = c_parser_peek_token (parser
)->location
;
1721 fnbody
= c_parser_compound_statement (parser
);
1724 tree decl
= current_function_decl
;
1725 /* Mark nested functions as needing static-chain initially.
1726 lower_nested_functions will recompute it but the
1727 DECL_STATIC_CHAIN flag is also used before that happens,
1728 by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */
1729 DECL_STATIC_CHAIN (decl
) = 1;
1732 c_pop_function_context ();
1733 add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl
), DECL_EXPR
, decl
));
1744 /* Parse an asm-definition (asm() outside a function body). This is a
1752 c_parser_asm_definition (c_parser
*parser
)
1754 tree asm_str
= c_parser_simple_asm_expr (parser
);
1756 cgraph_add_asm_node (asm_str
);
1757 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1760 /* Parse a static assertion (C1X N1425 6.7.10).
1762 static_assert-declaration:
1763 static_assert-declaration-no-semi ;
1767 c_parser_static_assert_declaration (c_parser
*parser
)
1769 c_parser_static_assert_declaration_no_semi (parser
);
1771 || !c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
1772 c_parser_skip_to_end_of_block_or_statement (parser
);
1775 /* Parse a static assertion (C1X N1425 6.7.10), without the trailing
1778 static_assert-declaration-no-semi:
1779 _Static_assert ( constant-expression , string-literal )
1783 c_parser_static_assert_declaration_no_semi (c_parser
*parser
)
1785 location_t assert_loc
, value_loc
;
1789 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
));
1790 assert_loc
= c_parser_peek_token (parser
)->location
;
1794 pedwarn (assert_loc
, OPT_pedantic
,
1795 "ISO C99 does not support %<_Static_assert%>");
1797 pedwarn (assert_loc
, OPT_pedantic
,
1798 "ISO C90 does not support %<_Static_assert%>");
1800 c_parser_consume_token (parser
);
1801 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1803 value_loc
= c_parser_peek_token (parser
)->location
;
1804 value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1805 parser
->lex_untranslated_string
= true;
1806 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
1808 parser
->lex_untranslated_string
= false;
1811 switch (c_parser_peek_token (parser
)->type
)
1817 case CPP_UTF8STRING
:
1818 string
= c_parser_peek_token (parser
)->value
;
1819 c_parser_consume_token (parser
);
1820 parser
->lex_untranslated_string
= false;
1823 c_parser_error (parser
, "expected string literal");
1824 parser
->lex_untranslated_string
= false;
1827 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
1829 if (!INTEGRAL_TYPE_P (TREE_TYPE (value
)))
1831 error_at (value_loc
, "expression in static assertion is not an integer");
1834 if (TREE_CODE (value
) != INTEGER_CST
)
1836 value
= c_fully_fold (value
, false, NULL
);
1837 if (TREE_CODE (value
) == INTEGER_CST
)
1838 pedwarn (value_loc
, OPT_pedantic
, "expression in static assertion "
1839 "is not an integer constant expression");
1841 if (TREE_CODE (value
) != INTEGER_CST
)
1843 error_at (value_loc
, "expression in static assertion is not constant");
1846 constant_expression_warning (value
);
1847 if (integer_zerop (value
))
1848 error_at (assert_loc
, "static assertion failed: %E", string
);
1851 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1852 6.7), adding them to SPECS (which may already include some).
1853 Storage class specifiers are accepted iff SCSPEC_OK; type
1854 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1855 the start iff START_ATTR_OK.
1857 declaration-specifiers:
1858 storage-class-specifier declaration-specifiers[opt]
1859 type-specifier declaration-specifiers[opt]
1860 type-qualifier declaration-specifiers[opt]
1861 function-specifier declaration-specifiers[opt]
1863 Function specifiers (inline) are from C99, and are currently
1864 handled as storage class specifiers, as is __thread.
1866 C90 6.5.1, C99 6.7.1:
1867 storage-class-specifier:
1878 C90 6.5.2, C99 6.7.2:
1891 [_Imaginary removed in C99 TC2]
1892 struct-or-union-specifier
1896 (_Bool and _Complex are new in C99.)
1898 C90 6.5.3, C99 6.7.3:
1904 address-space-qualifier
1906 (restrict is new in C99.)
1910 declaration-specifiers:
1911 attributes declaration-specifiers[opt]
1917 identifier recognized by the target
1919 storage-class-specifier:
1932 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1933 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1938 class-name objc-protocol-refs[opt]
1939 typedef-name objc-protocol-refs
1944 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1945 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
,
1946 enum c_lookahead_kind la
)
1948 bool attrs_ok
= start_attr_ok
;
1949 bool seen_type
= specs
->typespec_kind
!= ctsk_none
;
1952 gcc_assert (la
== cla_prefer_id
);
1954 while (c_parser_next_token_is (parser
, CPP_NAME
)
1955 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1956 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1958 struct c_typespec t
;
1960 location_t loc
= c_parser_peek_token (parser
)->location
;
1962 /* If we cannot accept a type, exit if the next token must start
1963 one. Also, if we already have seen a tagged definition,
1964 a typename would be an error anyway and likely the user
1965 has simply forgotten a semicolon, so we exit. */
1966 if ((!typespec_ok
|| specs
->typespec_kind
== ctsk_tagdef
)
1967 && c_parser_next_tokens_start_typename (parser
, la
)
1968 && !c_parser_next_token_is_qualifier (parser
))
1971 if (c_parser_next_token_is (parser
, CPP_NAME
))
1973 tree value
= c_parser_peek_token (parser
)->value
;
1974 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1976 if (kind
== C_ID_ADDRSPACE
)
1979 = c_parser_peek_token (parser
)->keyword
- RID_FIRST_ADDR_SPACE
;
1980 declspecs_add_addrspace (specs
, as
);
1981 c_parser_consume_token (parser
);
1986 gcc_assert (!c_parser_next_token_is_qualifier (parser
));
1988 /* If we cannot accept a type, and the next token must start one,
1989 exit. Do the same if we already have seen a tagged definition,
1990 since it would be an error anyway and likely the user has simply
1991 forgotten a semicolon. */
1992 if (seen_type
|| !c_parser_next_tokens_start_typename (parser
, la
))
1995 /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
1996 a C_ID_CLASSNAME. */
1997 c_parser_consume_token (parser
);
2000 if (kind
== C_ID_ID
)
2002 error ("unknown type name %qE", value
);
2003 t
.kind
= ctsk_typedef
;
2004 t
.spec
= error_mark_node
;
2006 else if (kind
== C_ID_TYPENAME
2007 && (!c_dialect_objc ()
2008 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
2010 t
.kind
= ctsk_typedef
;
2011 /* For a typedef name, record the meaning, not the name.
2012 In case of 'foo foo, bar;'. */
2013 t
.spec
= lookup_name (value
);
2017 tree proto
= NULL_TREE
;
2018 gcc_assert (c_dialect_objc ());
2020 if (c_parser_next_token_is (parser
, CPP_LESS
))
2021 proto
= c_parser_objc_protocol_refs (parser
);
2022 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
2025 t
.expr_const_operands
= true;
2026 declspecs_add_type (loc
, specs
, t
);
2029 if (c_parser_next_token_is (parser
, CPP_LESS
))
2031 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
2032 nisse@lysator.liu.se. */
2034 gcc_assert (c_dialect_objc ());
2035 if (!typespec_ok
|| seen_type
)
2037 proto
= c_parser_objc_protocol_refs (parser
);
2039 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
2041 t
.expr_const_operands
= true;
2042 declspecs_add_type (loc
, specs
, t
);
2045 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
2046 switch (c_parser_peek_token (parser
)->keyword
)
2058 /* TODO: Distinguish between function specifiers (inline)
2059 and storage class specifiers, either here or in
2060 declspecs_add_scspec. */
2061 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
2062 c_parser_consume_token (parser
);
2086 if (c_dialect_objc ())
2087 parser
->objc_need_raw_identifier
= true;
2088 t
.kind
= ctsk_resword
;
2089 t
.spec
= c_parser_peek_token (parser
)->value
;
2091 t
.expr_const_operands
= true;
2092 declspecs_add_type (loc
, specs
, t
);
2093 c_parser_consume_token (parser
);
2100 t
= c_parser_enum_specifier (parser
);
2101 declspecs_add_type (loc
, specs
, t
);
2109 t
= c_parser_struct_or_union_specifier (parser
);
2110 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, t
.spec
);
2111 declspecs_add_type (loc
, specs
, t
);
2114 /* ??? The old parser rejected typeof after other type
2115 specifiers, but is a syntax error the best way of
2117 if (!typespec_ok
|| seen_type
)
2121 t
= c_parser_typeof_specifier (parser
);
2122 declspecs_add_type (loc
, specs
, t
);
2128 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
2129 c_parser_consume_token (parser
);
2134 attrs
= c_parser_attributes (parser
);
2135 declspecs_add_attrs (specs
, attrs
);
2144 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
2147 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
2148 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
2149 enum attributes[opt] identifier
2151 The form with trailing comma is new in C99. The forms with
2152 attributes are GNU extensions. In GNU C, we accept any expression
2153 without commas in the syntax (assignment expressions, not just
2154 conditional expressions); assignment expressions will be diagnosed
2159 enumerator-list , enumerator
2162 enumeration-constant
2163 enumeration-constant = constant-expression
2166 static struct c_typespec
2167 c_parser_enum_specifier (c_parser
*parser
)
2169 struct c_typespec ret
;
2171 tree ident
= NULL_TREE
;
2172 location_t enum_loc
;
2173 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2174 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
2175 enum_loc
= c_parser_peek_token (parser
)->location
;
2176 c_parser_consume_token (parser
);
2177 attrs
= c_parser_attributes (parser
);
2178 enum_loc
= c_parser_peek_token (parser
)->location
;
2179 /* Set the location in case we create a decl now. */
2180 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2181 if (c_parser_next_token_is (parser
, CPP_NAME
))
2183 ident
= c_parser_peek_token (parser
)->value
;
2184 ident_loc
= c_parser_peek_token (parser
)->location
;
2185 enum_loc
= ident_loc
;
2186 c_parser_consume_token (parser
);
2188 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2190 /* Parse an enum definition. */
2191 struct c_enum_contents the_enum
;
2192 tree type
= start_enum (enum_loc
, &the_enum
, ident
);
2194 /* We chain the enumerators in reverse order, then put them in
2195 forward order at the end. */
2196 tree values
= NULL_TREE
;
2197 c_parser_consume_token (parser
);
2205 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2206 location_t decl_loc
, value_loc
;
2207 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
2209 c_parser_error (parser
, "expected identifier");
2210 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2211 values
= error_mark_node
;
2214 token
= c_parser_peek_token (parser
);
2215 enum_id
= token
->value
;
2216 /* Set the location in case we create a decl now. */
2217 c_parser_set_source_position_from_token (token
);
2218 decl_loc
= value_loc
= token
->location
;
2219 c_parser_consume_token (parser
);
2220 if (c_parser_next_token_is (parser
, CPP_EQ
))
2222 c_parser_consume_token (parser
);
2223 value_loc
= c_parser_peek_token (parser
)->location
;
2224 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
2227 enum_value
= NULL_TREE
;
2228 enum_decl
= build_enumerator (decl_loc
, value_loc
,
2229 &the_enum
, enum_id
, enum_value
);
2230 TREE_CHAIN (enum_decl
) = values
;
2233 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2235 comma_loc
= c_parser_peek_token (parser
)->location
;
2237 c_parser_consume_token (parser
);
2239 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2241 if (seen_comma
&& !flag_isoc99
)
2242 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
2243 c_parser_consume_token (parser
);
2248 c_parser_error (parser
, "expected %<,%> or %<}%>");
2249 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2250 values
= error_mark_node
;
2254 postfix_attrs
= c_parser_attributes (parser
);
2255 ret
.spec
= finish_enum (type
, nreverse (values
),
2256 chainon (attrs
, postfix_attrs
));
2257 ret
.kind
= ctsk_tagdef
;
2258 ret
.expr
= NULL_TREE
;
2259 ret
.expr_const_operands
= true;
2264 c_parser_error (parser
, "expected %<{%>");
2265 ret
.spec
= error_mark_node
;
2266 ret
.kind
= ctsk_tagref
;
2267 ret
.expr
= NULL_TREE
;
2268 ret
.expr_const_operands
= true;
2271 ret
= parser_xref_tag (ident_loc
, ENUMERAL_TYPE
, ident
);
2272 /* In ISO C, enumerated types can be referred to only if already
2274 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
2277 pedwarn (enum_loc
, OPT_pedantic
,
2278 "ISO C forbids forward references to %<enum%> types");
2283 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
2285 struct-or-union-specifier:
2286 struct-or-union attributes[opt] identifier[opt]
2287 { struct-contents } attributes[opt]
2288 struct-or-union attributes[opt] identifier
2291 struct-declaration-list
2293 struct-declaration-list:
2294 struct-declaration ;
2295 struct-declaration-list struct-declaration ;
2302 struct-declaration-list struct-declaration
2304 struct-declaration-list:
2305 struct-declaration-list ;
2308 (Note that in the syntax here, unlike that in ISO C, the semicolons
2309 are included here rather than in struct-declaration, in order to
2310 describe the syntax with extra semicolons and missing semicolon at
2315 struct-declaration-list:
2316 @defs ( class-name )
2318 (Note this does not include a trailing semicolon, but can be
2319 followed by further declarations, and gets a pedwarn-if-pedantic
2320 when followed by a semicolon.) */
2322 static struct c_typespec
2323 c_parser_struct_or_union_specifier (c_parser
*parser
)
2325 struct c_typespec ret
;
2327 tree ident
= NULL_TREE
;
2328 location_t struct_loc
;
2329 location_t ident_loc
= UNKNOWN_LOCATION
;
2330 enum tree_code code
;
2331 switch (c_parser_peek_token (parser
)->keyword
)
2342 struct_loc
= c_parser_peek_token (parser
)->location
;
2343 c_parser_consume_token (parser
);
2344 attrs
= c_parser_attributes (parser
);
2346 /* Set the location in case we create a decl now. */
2347 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2349 if (c_parser_next_token_is (parser
, CPP_NAME
))
2351 ident
= c_parser_peek_token (parser
)->value
;
2352 ident_loc
= c_parser_peek_token (parser
)->location
;
2353 struct_loc
= ident_loc
;
2354 c_parser_consume_token (parser
);
2356 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2358 /* Parse a struct or union definition. Start the scope of the
2359 tag before parsing components. */
2360 struct c_struct_parse_info
*struct_info
;
2361 tree type
= start_struct (struct_loc
, code
, ident
, &struct_info
);
2363 /* We chain the components in reverse order, then put them in
2364 forward order at the end. Each struct-declaration may
2365 declare multiple components (comma-separated), so we must use
2366 chainon to join them, although when parsing each
2367 struct-declaration we can use TREE_CHAIN directly.
2369 The theory behind all this is that there will be more
2370 semicolon separated fields than comma separated fields, and
2371 so we'll be minimizing the number of node traversals required
2373 tree contents
= NULL_TREE
;
2374 c_parser_consume_token (parser
);
2375 /* Handle the Objective-C @defs construct,
2376 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
2377 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
2380 gcc_assert (c_dialect_objc ());
2381 c_parser_consume_token (parser
);
2382 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2384 if (c_parser_next_token_is (parser
, CPP_NAME
)
2385 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
2387 name
= c_parser_peek_token (parser
)->value
;
2388 c_parser_consume_token (parser
);
2392 c_parser_error (parser
, "expected class name");
2393 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2396 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2398 contents
= nreverse (objc_get_class_ivars (name
));
2401 /* Parse the struct-declarations and semicolons. Problems with
2402 semicolons are diagnosed here; empty structures are diagnosed
2407 /* Parse any stray semicolon. */
2408 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2410 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
2411 "extra semicolon in struct or union specified");
2412 c_parser_consume_token (parser
);
2415 /* Stop if at the end of the struct or union contents. */
2416 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2418 c_parser_consume_token (parser
);
2421 /* Accept #pragmas at struct scope. */
2422 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
2424 c_parser_pragma (parser
, pragma_external
);
2427 /* Parse some comma-separated declarations, but not the
2428 trailing semicolon if any. */
2429 decls
= c_parser_struct_declaration (parser
);
2430 contents
= chainon (decls
, contents
);
2431 /* If no semicolon follows, either we have a parse error or
2432 are at the end of the struct or union and should
2434 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2435 c_parser_consume_token (parser
);
2438 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2439 pedwarn (c_parser_peek_token (parser
)->location
, 0,
2440 "no semicolon at end of struct or union");
2441 else if (parser
->error
2442 || !c_parser_next_token_starts_declspecs (parser
))
2444 c_parser_error (parser
, "expected %<;%>");
2445 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2449 /* If we come here, we have already emitted an error
2450 for an expected `;', identifier or `(', and we also
2451 recovered already. Go on with the next field. */
2454 postfix_attrs
= c_parser_attributes (parser
);
2455 ret
.spec
= finish_struct (struct_loc
, type
, nreverse (contents
),
2456 chainon (attrs
, postfix_attrs
), struct_info
);
2457 ret
.kind
= ctsk_tagdef
;
2458 ret
.expr
= NULL_TREE
;
2459 ret
.expr_const_operands
= true;
2464 c_parser_error (parser
, "expected %<{%>");
2465 ret
.spec
= error_mark_node
;
2466 ret
.kind
= ctsk_tagref
;
2467 ret
.expr
= NULL_TREE
;
2468 ret
.expr_const_operands
= true;
2471 ret
= parser_xref_tag (ident_loc
, code
, ident
);
2475 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
2476 the trailing semicolon.
2479 specifier-qualifier-list struct-declarator-list
2480 static_assert-declaration-no-semi
2482 specifier-qualifier-list:
2483 type-specifier specifier-qualifier-list[opt]
2484 type-qualifier specifier-qualifier-list[opt]
2485 attributes specifier-qualifier-list[opt]
2487 struct-declarator-list:
2489 struct-declarator-list , attributes[opt] struct-declarator
2492 declarator attributes[opt]
2493 declarator[opt] : constant-expression attributes[opt]
2498 __extension__ struct-declaration
2499 specifier-qualifier-list
2501 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
2502 of attributes where shown is a GNU extension. In GNU C, we accept
2503 any expression without commas in the syntax (assignment
2504 expressions, not just conditional expressions); assignment
2505 expressions will be diagnosed as non-constant. */
2508 c_parser_struct_declaration (c_parser
*parser
)
2510 struct c_declspecs
*specs
;
2512 tree all_prefix_attrs
;
2514 location_t decl_loc
;
2515 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2519 ext
= disable_extension_diagnostics ();
2520 c_parser_consume_token (parser
);
2521 decl
= c_parser_struct_declaration (parser
);
2522 restore_extension_diagnostics (ext
);
2525 if (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
2527 c_parser_static_assert_declaration_no_semi (parser
);
2530 specs
= build_null_declspecs ();
2531 decl_loc
= c_parser_peek_token (parser
)->location
;
2532 c_parser_declspecs (parser
, specs
, false, true, true, cla_nonabstract_decl
);
2535 if (!specs
->declspecs_seen_p
)
2537 c_parser_error (parser
, "expected specifier-qualifier-list");
2540 finish_declspecs (specs
);
2541 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2542 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2545 if (specs
->typespec_kind
== ctsk_none
)
2547 pedwarn (decl_loc
, OPT_pedantic
,
2548 "ISO C forbids member declarations with no members");
2549 shadow_tag_warned (specs
, pedantic
);
2554 /* Support for unnamed structs or unions as members of
2555 structs or unions (which is [a] useful and [b] supports
2559 ret
= grokfield (c_parser_peek_token (parser
)->location
,
2560 build_id_declarator (NULL_TREE
), specs
,
2563 decl_attributes (&ret
, attrs
, 0);
2568 /* Provide better error recovery. Note that a type name here is valid,
2569 and will be treated as a field name. */
2570 if (specs
->typespec_kind
== ctsk_tagdef
2571 && TREE_CODE (specs
->type
) != ENUMERAL_TYPE
2572 && c_parser_next_token_starts_declspecs (parser
)
2573 && !c_parser_next_token_is (parser
, CPP_NAME
))
2575 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
2576 parser
->error
= false;
2580 pending_xref_error ();
2581 prefix_attrs
= specs
->attrs
;
2582 all_prefix_attrs
= prefix_attrs
;
2583 specs
->attrs
= NULL_TREE
;
2587 /* Declaring one or more declarators or un-named bit-fields. */
2588 struct c_declarator
*declarator
;
2590 if (c_parser_next_token_is (parser
, CPP_COLON
))
2591 declarator
= build_id_declarator (NULL_TREE
);
2593 declarator
= c_parser_declarator (parser
,
2594 specs
->typespec_kind
!= ctsk_none
,
2595 C_DTR_NORMAL
, &dummy
);
2596 if (declarator
== NULL
)
2598 c_parser_skip_to_end_of_block_or_statement (parser
);
2601 if (c_parser_next_token_is (parser
, CPP_COLON
)
2602 || c_parser_next_token_is (parser
, CPP_COMMA
)
2603 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2604 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2605 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2607 tree postfix_attrs
= NULL_TREE
;
2608 tree width
= NULL_TREE
;
2610 if (c_parser_next_token_is (parser
, CPP_COLON
))
2612 c_parser_consume_token (parser
);
2613 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2615 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2616 postfix_attrs
= c_parser_attributes (parser
);
2617 d
= grokfield (c_parser_peek_token (parser
)->location
,
2618 declarator
, specs
, width
, &all_prefix_attrs
);
2619 decl_attributes (&d
, chainon (postfix_attrs
,
2620 all_prefix_attrs
), 0);
2621 DECL_CHAIN (d
) = decls
;
2623 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2624 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2627 all_prefix_attrs
= prefix_attrs
;
2628 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2629 c_parser_consume_token (parser
);
2630 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2631 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2633 /* Semicolon consumed in caller. */
2638 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2644 c_parser_error (parser
,
2645 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2646 "%<__attribute__%>");
2653 /* Parse a typeof specifier (a GNU extension).
2656 typeof ( expression )
2657 typeof ( type-name )
2660 static struct c_typespec
2661 c_parser_typeof_specifier (c_parser
*parser
)
2663 struct c_typespec ret
;
2664 ret
.kind
= ctsk_typeof
;
2665 ret
.spec
= error_mark_node
;
2666 ret
.expr
= NULL_TREE
;
2667 ret
.expr_const_operands
= true;
2668 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2669 c_parser_consume_token (parser
);
2670 c_inhibit_evaluation_warnings
++;
2672 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2674 c_inhibit_evaluation_warnings
--;
2678 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_id
))
2680 struct c_type_name
*type
= c_parser_type_name (parser
);
2681 c_inhibit_evaluation_warnings
--;
2685 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2686 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2692 location_t here
= c_parser_peek_token (parser
)->location
;
2693 struct c_expr expr
= c_parser_expression (parser
);
2694 c_inhibit_evaluation_warnings
--;
2696 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2697 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2698 error_at (here
, "%<typeof%> applied to a bit-field");
2699 mark_exp_read (expr
.value
);
2700 ret
.spec
= TREE_TYPE (expr
.value
);
2701 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2702 /* This is returned with the type so that when the type is
2703 evaluated, this can be evaluated. */
2705 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2706 pop_maybe_used (was_vm
);
2708 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2712 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2713 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2714 be redeclared; otherwise it may not. KIND indicates which kind of
2715 declarator is wanted. Returns a valid declarator except in the
2716 case of a syntax error in which case NULL is returned. *SEEN_ID is
2717 set to true if an identifier being declared is seen; this is used
2718 to diagnose bad forms of abstract array declarators and to
2719 determine whether an identifier list is syntactically permitted.
2722 pointer[opt] direct-declarator
2726 ( attributes[opt] declarator )
2727 direct-declarator array-declarator
2728 direct-declarator ( parameter-type-list )
2729 direct-declarator ( identifier-list[opt] )
2732 * type-qualifier-list[opt]
2733 * type-qualifier-list[opt] pointer
2735 type-qualifier-list:
2738 type-qualifier-list type-qualifier
2739 type-qualifier-list attributes
2741 parameter-type-list:
2743 parameter-list , ...
2746 parameter-declaration
2747 parameter-list , parameter-declaration
2749 parameter-declaration:
2750 declaration-specifiers declarator attributes[opt]
2751 declaration-specifiers abstract-declarator[opt] attributes[opt]
2755 identifier-list , identifier
2757 abstract-declarator:
2759 pointer[opt] direct-abstract-declarator
2761 direct-abstract-declarator:
2762 ( attributes[opt] abstract-declarator )
2763 direct-abstract-declarator[opt] array-declarator
2764 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2769 direct-declarator ( parameter-forward-declarations
2770 parameter-type-list[opt] )
2772 direct-abstract-declarator:
2773 direct-abstract-declarator[opt] ( parameter-forward-declarations
2774 parameter-type-list[opt] )
2776 parameter-forward-declarations:
2778 parameter-forward-declarations parameter-list ;
2780 The uses of attributes shown above are GNU extensions.
2782 Some forms of array declarator are not included in C99 in the
2783 syntax for abstract declarators; these are disallowed elsewhere.
2784 This may be a defect (DR#289).
2786 This function also accepts an omitted abstract declarator as being
2787 an abstract declarator, although not part of the formal syntax. */
2789 static struct c_declarator
*
2790 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2793 /* Parse any initial pointer part. */
2794 if (c_parser_next_token_is (parser
, CPP_MULT
))
2796 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2797 struct c_declarator
*inner
;
2798 c_parser_consume_token (parser
);
2799 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2800 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2804 return make_pointer_declarator (quals_attrs
, inner
);
2806 /* Now we have a direct declarator, direct abstract declarator or
2807 nothing (which counts as a direct abstract declarator here). */
2808 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2811 /* Parse a direct declarator or direct abstract declarator; arguments
2812 as c_parser_declarator. */
2814 static struct c_declarator
*
2815 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2818 /* The direct declarator must start with an identifier (possibly
2819 omitted) or a parenthesized declarator (possibly abstract). In
2820 an ordinary declarator, initial parentheses must start a
2821 parenthesized declarator. In an abstract declarator or parameter
2822 declarator, they could start a parenthesized declarator or a
2823 parameter list. To tell which, the open parenthesis and any
2824 following attributes must be read. If a declaration specifier
2825 follows, then it is a parameter list; if the specifier is a
2826 typedef name, there might be an ambiguity about redeclaring it,
2827 which is resolved in the direction of treating it as a typedef
2828 name. If a close parenthesis follows, it is also an empty
2829 parameter list, as the syntax does not permit empty abstract
2830 declarators. Otherwise, it is a parenthesized declarator (in
2831 which case the analysis may be repeated inside it, recursively).
2833 ??? There is an ambiguity in a parameter declaration "int
2834 (__attribute__((foo)) x)", where x is not a typedef name: it
2835 could be an abstract declarator for a function, or declare x with
2836 parentheses. The proper resolution of this ambiguity needs
2837 documenting. At present we follow an accident of the old
2838 parser's implementation, whereby the first parameter must have
2839 some declaration specifiers other than just attributes. Thus as
2840 a parameter declaration it is treated as a parenthesized
2841 parameter named x, and as an abstract declarator it is
2844 ??? Also following the old parser, attributes inside an empty
2845 parameter list are ignored, making it a list not yielding a
2846 prototype, rather than giving an error or making it have one
2847 parameter with implicit type int.
2849 ??? Also following the old parser, typedef names may be
2850 redeclared in declarators, but not Objective-C class names. */
2852 if (kind
!= C_DTR_ABSTRACT
2853 && c_parser_next_token_is (parser
, CPP_NAME
)
2855 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
2856 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
2857 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2859 struct c_declarator
*inner
2860 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2862 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2863 c_parser_consume_token (parser
);
2864 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2867 if (kind
!= C_DTR_NORMAL
2868 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2870 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2871 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2874 /* Either we are at the end of an abstract declarator, or we have
2877 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2880 struct c_declarator
*inner
;
2881 c_parser_consume_token (parser
);
2882 attrs
= c_parser_attributes (parser
);
2883 if (kind
!= C_DTR_NORMAL
2884 && (c_parser_next_token_starts_declspecs (parser
)
2885 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2887 struct c_arg_info
*args
2888 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2895 = build_function_declarator (args
,
2896 build_id_declarator (NULL_TREE
));
2897 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2901 /* A parenthesized declarator. */
2902 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2903 if (inner
!= NULL
&& attrs
!= NULL
)
2904 inner
= build_attrs_declarator (attrs
, inner
);
2905 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2907 c_parser_consume_token (parser
);
2911 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2915 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2922 if (kind
== C_DTR_NORMAL
)
2924 c_parser_error (parser
, "expected identifier or %<(%>");
2928 return build_id_declarator (NULL_TREE
);
2932 /* Parse part of a direct declarator or direct abstract declarator,
2933 given that some (in INNER) has already been parsed; ID_PRESENT is
2934 true if an identifier is present, false for an abstract
2937 static struct c_declarator
*
2938 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2939 struct c_declarator
*inner
)
2941 /* Parse a sequence of array declarators and parameter lists. */
2942 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2944 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
2945 struct c_declarator
*declarator
;
2946 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2950 c_parser_consume_token (parser
);
2951 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2952 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2954 c_parser_consume_token (parser
);
2955 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2956 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2957 if (!quals_attrs
->declspecs_seen_p
)
2959 /* If "static" is present, there must be an array dimension.
2960 Otherwise, there may be a dimension, "*", or no
2965 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2969 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2974 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2976 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2980 c_parser_consume_token (parser
);
2985 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2991 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2994 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2995 c_parser_consume_token (parser
);
2998 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3003 mark_exp_read (dimen
);
3004 declarator
= build_array_declarator (brace_loc
, dimen
, quals_attrs
,
3005 static_seen
, star_seen
);
3006 if (declarator
== NULL
)
3008 inner
= set_array_declarator_inner (declarator
, inner
);
3009 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3011 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
3014 struct c_arg_info
*args
;
3015 c_parser_consume_token (parser
);
3016 attrs
= c_parser_attributes (parser
);
3017 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
3022 inner
= build_function_declarator (args
, inner
);
3023 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3029 /* Parse a parameter list or identifier list, including the closing
3030 parenthesis but not the opening one. ATTRS are the attributes at
3031 the start of the list. ID_LIST_OK is true if an identifier list is
3032 acceptable; such a list must not have attributes at the start. */
3034 static struct c_arg_info
*
3035 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
3038 declare_parm_level ();
3039 /* If the list starts with an identifier, it is an identifier list.
3040 Otherwise, it is either a prototype list or an empty list. */
3043 && c_parser_next_token_is (parser
, CPP_NAME
)
3044 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3046 /* Look ahead to detect typos in type names. */
3047 && c_parser_peek_2nd_token (parser
)->type
!= CPP_NAME
3048 && c_parser_peek_2nd_token (parser
)->type
!= CPP_MULT
3049 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_PAREN
3050 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_SQUARE
)
3052 tree list
= NULL_TREE
, *nextp
= &list
;
3053 while (c_parser_next_token_is (parser
, CPP_NAME
)
3054 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
3056 *nextp
= build_tree_list (NULL_TREE
,
3057 c_parser_peek_token (parser
)->value
);
3058 nextp
= & TREE_CHAIN (*nextp
);
3059 c_parser_consume_token (parser
);
3060 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
3062 c_parser_consume_token (parser
);
3063 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3065 c_parser_error (parser
, "expected identifier");
3069 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3071 struct c_arg_info
*ret
= build_arg_info ();
3073 c_parser_consume_token (parser
);
3079 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3087 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
3093 /* Parse a parameter list (possibly empty), including the closing
3094 parenthesis but not the opening one. ATTRS are the attributes at
3095 the start of the list. */
3097 static struct c_arg_info
*
3098 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
3100 bool bad_parm
= false;
3101 /* ??? Following the old parser, forward parameter declarations may
3102 use abstract declarators, and if no real parameter declarations
3103 follow the forward declarations then this is not diagnosed. Also
3104 note as above that attributes are ignored as the only contents of
3105 the parentheses, or as the only contents after forward
3107 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3109 struct c_arg_info
*ret
= build_arg_info ();
3110 c_parser_consume_token (parser
);
3113 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3115 struct c_arg_info
*ret
= build_arg_info ();
3116 /* Suppress -Wold-style-definition for this case. */
3117 ret
->types
= error_mark_node
;
3118 error_at (c_parser_peek_token (parser
)->location
,
3119 "ISO C requires a named argument before %<...%>");
3120 c_parser_consume_token (parser
);
3121 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3123 c_parser_consume_token (parser
);
3128 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3133 /* Nonempty list of parameters, either terminated with semicolon
3134 (forward declarations; recurse) or with close parenthesis (normal
3135 function) or with ", ... )" (variadic function). */
3138 /* Parse a parameter. */
3139 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
3144 push_parm_decl (parm
);
3145 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3148 c_parser_consume_token (parser
);
3149 mark_forward_parm_decls ();
3150 new_attrs
= c_parser_attributes (parser
);
3151 return c_parser_parms_list_declarator (parser
, new_attrs
);
3153 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3155 c_parser_consume_token (parser
);
3158 get_pending_sizes ();
3162 return get_parm_info (false);
3164 if (!c_parser_require (parser
, CPP_COMMA
,
3165 "expected %<;%>, %<,%> or %<)%>"))
3167 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3168 get_pending_sizes ();
3171 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3173 c_parser_consume_token (parser
);
3174 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3176 c_parser_consume_token (parser
);
3179 get_pending_sizes ();
3183 return get_parm_info (true);
3187 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3189 get_pending_sizes ();
3196 /* Parse a parameter declaration. ATTRS are the attributes at the
3197 start of the declaration if it is the first parameter. */
3199 static struct c_parm
*
3200 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
3202 struct c_declspecs
*specs
;
3203 struct c_declarator
*declarator
;
3205 tree postfix_attrs
= NULL_TREE
;
3207 if (!c_parser_next_token_starts_declspecs (parser
))
3209 c_token
*token
= c_parser_peek_token (parser
);
3212 c_parser_set_source_position_from_token (token
);
3213 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
3215 error ("unknown type name %qE", token
->value
);
3216 parser
->error
= true;
3218 /* ??? In some Objective-C cases '...' isn't applicable so there
3219 should be a different message. */
3221 c_parser_error (parser
,
3222 "expected declaration specifiers or %<...%>");
3223 c_parser_skip_to_end_of_parameter (parser
);
3226 specs
= build_null_declspecs ();
3229 declspecs_add_attrs (specs
, attrs
);
3232 c_parser_declspecs (parser
, specs
, true, true, true, cla_nonabstract_decl
);
3233 finish_declspecs (specs
);
3234 pending_xref_error ();
3235 prefix_attrs
= specs
->attrs
;
3236 specs
->attrs
= NULL_TREE
;
3237 declarator
= c_parser_declarator (parser
,
3238 specs
->typespec_kind
!= ctsk_none
,
3239 C_DTR_PARM
, &dummy
);
3240 if (declarator
== NULL
)
3242 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3245 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3246 postfix_attrs
= c_parser_attributes (parser
);
3247 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
3251 /* Parse a string literal in an asm expression. It should not be
3252 translated, and wide string literals are an error although
3253 permitted by the syntax. This is a GNU extension.
3258 ??? At present, following the old parser, the caller needs to have
3259 set lex_untranslated_string to 1. It would be better to follow the
3260 C++ parser rather than using this kludge. */
3263 c_parser_asm_string_literal (c_parser
*parser
)
3266 int save_flag
= warn_overlength_strings
;
3267 warn_overlength_strings
= 0;
3268 if (c_parser_next_token_is (parser
, CPP_STRING
))
3270 str
= c_parser_peek_token (parser
)->value
;
3271 c_parser_consume_token (parser
);
3273 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
3275 error_at (c_parser_peek_token (parser
)->location
,
3276 "wide string literal in %<asm%>");
3277 str
= build_string (1, "");
3278 c_parser_consume_token (parser
);
3282 c_parser_error (parser
, "expected string literal");
3285 warn_overlength_strings
= save_flag
;
3289 /* Parse a simple asm expression. This is used in restricted
3290 contexts, where a full expression with inputs and outputs does not
3291 make sense. This is a GNU extension.
3294 asm ( asm-string-literal )
3298 c_parser_simple_asm_expr (c_parser
*parser
)
3301 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
3302 /* ??? Follow the C++ parser rather than using the
3303 lex_untranslated_string kludge. */
3304 parser
->lex_untranslated_string
= true;
3305 c_parser_consume_token (parser
);
3306 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3308 parser
->lex_untranslated_string
= false;
3311 str
= c_parser_asm_string_literal (parser
);
3312 parser
->lex_untranslated_string
= false;
3313 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
3315 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3321 /* Parse (possibly empty) attributes. This is a GNU extension.
3325 attributes attribute
3328 __attribute__ ( ( attribute-list ) )
3332 attribute_list , attrib
3337 any-word ( identifier )
3338 any-word ( identifier , nonempty-expr-list )
3339 any-word ( expr-list )
3341 where the "identifier" must not be declared as a type, and
3342 "any-word" may be any identifier (including one declared as a
3343 type), a reserved word storage class specifier, type specifier or
3344 type qualifier. ??? This still leaves out most reserved keywords
3345 (following the old parser), shouldn't we include them, and why not
3346 allow identifiers declared as types to start the arguments? */
3349 c_parser_attributes (c_parser
*parser
)
3351 tree attrs
= NULL_TREE
;
3352 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3354 /* ??? Follow the C++ parser rather than using the
3355 lex_untranslated_string kludge. */
3356 parser
->lex_untranslated_string
= true;
3357 c_parser_consume_token (parser
);
3358 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3360 parser
->lex_untranslated_string
= false;
3363 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3365 parser
->lex_untranslated_string
= false;
3366 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3369 /* Parse the attribute list. */
3370 while (c_parser_next_token_is (parser
, CPP_COMMA
)
3371 || c_parser_next_token_is (parser
, CPP_NAME
)
3372 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
3374 tree attr
, attr_name
, attr_args
;
3375 VEC(tree
,gc
) *expr_list
;
3376 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3378 c_parser_consume_token (parser
);
3381 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
3383 /* ??? See comment above about what keywords are
3386 switch (c_parser_peek_token (parser
)->keyword
)
3424 /* Accept __attribute__((__const)) as __attribute__((const))
3427 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
3430 attr_name
= c_parser_peek_token (parser
)->value
;
3431 c_parser_consume_token (parser
);
3432 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
3434 attr
= build_tree_list (attr_name
, NULL_TREE
);
3435 attrs
= chainon (attrs
, attr
);
3438 c_parser_consume_token (parser
);
3439 /* Parse the attribute contents. If they start with an
3440 identifier which is followed by a comma or close
3441 parenthesis, then the arguments start with that
3442 identifier; otherwise they are an expression list.
3443 In objective-c the identifier may be a classname. */
3444 if (c_parser_next_token_is (parser
, CPP_NAME
)
3445 && (c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3446 || (c_dialect_objc ()
3447 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
3448 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
3449 || (c_parser_peek_2nd_token (parser
)->type
3450 == CPP_CLOSE_PAREN
)))
3452 tree arg1
= c_parser_peek_token (parser
)->value
;
3453 c_parser_consume_token (parser
);
3454 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3455 attr_args
= build_tree_list (NULL_TREE
, arg1
);
3459 c_parser_consume_token (parser
);
3460 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
3461 tree_list
= build_tree_list_vec (expr_list
);
3462 attr_args
= tree_cons (NULL_TREE
, arg1
, tree_list
);
3463 release_tree_vector (expr_list
);
3468 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3469 attr_args
= NULL_TREE
;
3472 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
3473 attr_args
= build_tree_list_vec (expr_list
);
3474 release_tree_vector (expr_list
);
3477 attr
= build_tree_list (attr_name
, attr_args
);
3478 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3479 c_parser_consume_token (parser
);
3482 parser
->lex_untranslated_string
= false;
3483 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3487 attrs
= chainon (attrs
, attr
);
3489 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3490 c_parser_consume_token (parser
);
3493 parser
->lex_untranslated_string
= false;
3494 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3498 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3499 c_parser_consume_token (parser
);
3502 parser
->lex_untranslated_string
= false;
3503 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3507 parser
->lex_untranslated_string
= false;
3512 /* Parse a type name (C90 6.5.5, C99 6.7.6).
3515 specifier-qualifier-list abstract-declarator[opt]
3518 static struct c_type_name
*
3519 c_parser_type_name (c_parser
*parser
)
3521 struct c_declspecs
*specs
= build_null_declspecs ();
3522 struct c_declarator
*declarator
;
3523 struct c_type_name
*ret
;
3525 c_parser_declspecs (parser
, specs
, false, true, true, cla_prefer_type
);
3526 if (!specs
->declspecs_seen_p
)
3528 c_parser_error (parser
, "expected specifier-qualifier-list");
3531 if (specs
->type
!= error_mark_node
)
3533 pending_xref_error ();
3534 finish_declspecs (specs
);
3536 declarator
= c_parser_declarator (parser
,
3537 specs
->typespec_kind
!= ctsk_none
,
3538 C_DTR_ABSTRACT
, &dummy
);
3539 if (declarator
== NULL
)
3541 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
3543 ret
->declarator
= declarator
;
3547 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
3550 assignment-expression
3551 { initializer-list }
3552 { initializer-list , }
3555 designation[opt] initializer
3556 initializer-list , designation[opt] initializer
3563 designator-list designator
3570 [ constant-expression ]
3582 [ constant-expression ... constant-expression ]
3584 Any expression without commas is accepted in the syntax for the
3585 constant-expressions, with non-constant expressions rejected later.
3587 This function is only used for top-level initializers; for nested
3588 ones, see c_parser_initval. */
3590 static struct c_expr
3591 c_parser_initializer (c_parser
*parser
)
3593 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3594 return c_parser_braced_init (parser
, NULL_TREE
, false);
3598 location_t loc
= c_parser_peek_token (parser
)->location
;
3599 ret
= c_parser_expr_no_commas (parser
, NULL
);
3600 if (TREE_CODE (ret
.value
) != STRING_CST
3601 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3602 ret
= default_function_array_read_conversion (loc
, ret
);
3607 /* Parse a braced initializer list. TYPE is the type specified for a
3608 compound literal, and NULL_TREE for other initializers and for
3609 nested braced lists. NESTED_P is true for nested braced lists,
3610 false for the list of a compound literal or the list that is the
3611 top-level initializer in a declaration. */
3613 static struct c_expr
3614 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3617 struct obstack braced_init_obstack
;
3618 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3619 gcc_obstack_init (&braced_init_obstack
);
3620 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3621 c_parser_consume_token (parser
);
3623 push_init_level (0, &braced_init_obstack
);
3625 really_start_incremental_init (type
);
3626 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3628 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3632 /* Parse a non-empty initializer list, possibly with a trailing
3636 c_parser_initelt (parser
, &braced_init_obstack
);
3639 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3640 c_parser_consume_token (parser
);
3643 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3647 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3649 ret
.value
= error_mark_node
;
3650 ret
.original_code
= ERROR_MARK
;
3651 ret
.original_type
= NULL
;
3652 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3653 pop_init_level (0, &braced_init_obstack
);
3654 obstack_free (&braced_init_obstack
, NULL
);
3657 c_parser_consume_token (parser
);
3658 ret
= pop_init_level (0, &braced_init_obstack
);
3659 obstack_free (&braced_init_obstack
, NULL
);
3663 /* Parse a nested initializer, including designators. */
3666 c_parser_initelt (c_parser
*parser
, struct obstack
* braced_init_obstack
)
3668 /* Parse any designator or designator list. A single array
3669 designator may have the subsequent "=" omitted in GNU C, but a
3670 longer list or a structure member designator may not. */
3671 if (c_parser_next_token_is (parser
, CPP_NAME
)
3672 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3674 /* Old-style structure member designator. */
3675 set_init_label (c_parser_peek_token (parser
)->value
,
3676 braced_init_obstack
);
3677 /* Use the colon as the error location. */
3678 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3679 "obsolete use of designated initializer with %<:%>");
3680 c_parser_consume_token (parser
);
3681 c_parser_consume_token (parser
);
3685 /* des_seen is 0 if there have been no designators, 1 if there
3686 has been a single array designator and 2 otherwise. */
3688 /* Location of a designator. */
3689 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3690 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3691 || c_parser_next_token_is (parser
, CPP_DOT
))
3693 int des_prev
= des_seen
;
3695 des_loc
= c_parser_peek_token (parser
)->location
;
3698 if (c_parser_next_token_is (parser
, CPP_DOT
))
3701 c_parser_consume_token (parser
);
3702 if (c_parser_next_token_is (parser
, CPP_NAME
))
3704 set_init_label (c_parser_peek_token (parser
)->value
,
3705 braced_init_obstack
);
3706 c_parser_consume_token (parser
);
3711 init
.value
= error_mark_node
;
3712 init
.original_code
= ERROR_MARK
;
3713 init
.original_type
= NULL
;
3714 c_parser_error (parser
, "expected identifier");
3715 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3716 process_init_element (init
, false, braced_init_obstack
);
3723 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3724 /* ??? Following the old parser, [ objc-receiver
3725 objc-message-args ] is accepted as an initializer,
3726 being distinguished from a designator by what follows
3727 the first assignment expression inside the square
3728 brackets, but after a first array designator a
3729 subsequent square bracket is for Objective-C taken to
3730 start an expression, using the obsolete form of
3731 designated initializer without '=', rather than
3732 possibly being a second level of designation: in LALR
3733 terms, the '[' is shifted rather than reducing
3734 designator to designator-list. */
3735 if (des_prev
== 1 && c_dialect_objc ())
3737 des_seen
= des_prev
;
3740 if (des_prev
== 0 && c_dialect_objc ())
3742 /* This might be an array designator or an
3743 Objective-C message expression. If the former,
3744 continue parsing here; if the latter, parse the
3745 remainder of the initializer given the starting
3746 primary-expression. ??? It might make sense to
3747 distinguish when des_prev == 1 as well; see
3748 previous comment. */
3750 struct c_expr mexpr
;
3751 c_parser_consume_token (parser
);
3752 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3753 && ((c_parser_peek_token (parser
)->id_kind
3755 || (c_parser_peek_token (parser
)->id_kind
3756 == C_ID_CLASSNAME
)))
3758 /* Type name receiver. */
3759 tree id
= c_parser_peek_token (parser
)->value
;
3760 c_parser_consume_token (parser
);
3761 rec
= objc_get_class_reference (id
);
3762 goto parse_message_args
;
3764 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3765 mark_exp_read (first
);
3766 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3767 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3768 goto array_desig_after_first
;
3769 /* Expression receiver. So far only one part
3770 without commas has been parsed; there might be
3771 more of the expression. */
3773 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3776 location_t comma_loc
, exp_loc
;
3777 comma_loc
= c_parser_peek_token (parser
)->location
;
3778 c_parser_consume_token (parser
);
3779 exp_loc
= c_parser_peek_token (parser
)->location
;
3780 next
= c_parser_expr_no_commas (parser
, NULL
);
3781 next
= default_function_array_read_conversion (exp_loc
,
3783 rec
= build_compound_expr (comma_loc
, rec
, next
.value
);
3786 /* Now parse the objc-message-args. */
3787 args
= c_parser_objc_message_args (parser
);
3788 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3791 = objc_build_message_expr (build_tree_list (rec
, args
));
3792 mexpr
.original_code
= ERROR_MARK
;
3793 mexpr
.original_type
= NULL
;
3794 /* Now parse and process the remainder of the
3795 initializer, starting with this message
3796 expression as a primary-expression. */
3797 c_parser_initval (parser
, &mexpr
, braced_init_obstack
);
3800 c_parser_consume_token (parser
);
3801 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3802 mark_exp_read (first
);
3803 array_desig_after_first
:
3804 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3806 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3807 c_parser_consume_token (parser
);
3808 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3809 mark_exp_read (second
);
3813 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3815 c_parser_consume_token (parser
);
3816 set_init_index (first
, second
, braced_init_obstack
);
3818 pedwarn (ellipsis_loc
, OPT_pedantic
,
3819 "ISO C forbids specifying range of elements to initialize");
3822 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3828 if (c_parser_next_token_is (parser
, CPP_EQ
))
3831 pedwarn (des_loc
, OPT_pedantic
,
3832 "ISO C90 forbids specifying subobject to initialize");
3833 c_parser_consume_token (parser
);
3838 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3839 "obsolete use of designated initializer without %<=%>");
3843 init
.value
= error_mark_node
;
3844 init
.original_code
= ERROR_MARK
;
3845 init
.original_type
= NULL
;
3846 c_parser_error (parser
, "expected %<=%>");
3847 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3848 process_init_element (init
, false, braced_init_obstack
);
3854 c_parser_initval (parser
, NULL
, braced_init_obstack
);
3857 /* Parse a nested initializer; as c_parser_initializer but parses
3858 initializers within braced lists, after any designators have been
3859 applied. If AFTER is not NULL then it is an Objective-C message
3860 expression which is the primary-expression starting the
3864 c_parser_initval (c_parser
*parser
, struct c_expr
*after
,
3865 struct obstack
* braced_init_obstack
)
3868 gcc_assert (!after
|| c_dialect_objc ());
3869 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3870 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3873 location_t loc
= c_parser_peek_token (parser
)->location
;
3874 init
= c_parser_expr_no_commas (parser
, after
);
3875 if (init
.value
!= NULL_TREE
3876 && TREE_CODE (init
.value
) != STRING_CST
3877 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3878 init
= default_function_array_read_conversion (loc
, init
);
3880 process_init_element (init
, false, braced_init_obstack
);
3883 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3887 { block-item-list[opt] }
3888 { label-declarations block-item-list }
3892 block-item-list block-item
3904 { label-declarations block-item-list }
3907 __extension__ nested-declaration
3908 nested-function-definition
3912 label-declarations label-declaration
3915 __label__ identifier-list ;
3917 Allowing the mixing of declarations and code is new in C99. The
3918 GNU syntax also permits (not shown above) labels at the end of
3919 compound statements, which yield an error. We don't allow labels
3920 on declarations; this might seem like a natural extension, but
3921 there would be a conflict between attributes on the label and
3922 prefix attributes on the declaration. ??? The syntax follows the
3923 old parser in requiring something after label declarations.
3924 Although they are erroneous if the labels declared aren't defined,
3925 is it useful for the syntax to be this way?
3937 c_parser_compound_statement (c_parser
*parser
)
3940 location_t brace_loc
;
3941 brace_loc
= c_parser_peek_token (parser
)->location
;
3942 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3944 /* Ensure a scope is entered and left anyway to avoid confusion
3945 if we have just prepared to enter a function body. */
3946 stmt
= c_begin_compound_stmt (true);
3947 c_end_compound_stmt (brace_loc
, stmt
, true);
3948 return error_mark_node
;
3950 stmt
= c_begin_compound_stmt (true);
3951 c_parser_compound_statement_nostart (parser
);
3952 return c_end_compound_stmt (brace_loc
, stmt
, true);
3955 /* Parse a compound statement except for the opening brace. This is
3956 used for parsing both compound statements and statement expressions
3957 (which follow different paths to handling the opening). */
3960 c_parser_compound_statement_nostart (c_parser
*parser
)
3962 bool last_stmt
= false;
3963 bool last_label
= false;
3964 bool save_valid_for_pragma
= valid_location_for_stdc_pragma_p ();
3965 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3966 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3968 c_parser_consume_token (parser
);
3971 mark_valid_location_for_stdc_pragma (true);
3972 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3974 /* Read zero or more forward-declarations for labels that nested
3975 functions can jump to. */
3976 mark_valid_location_for_stdc_pragma (false);
3977 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3979 label_loc
= c_parser_peek_token (parser
)->location
;
3980 c_parser_consume_token (parser
);
3981 /* Any identifiers, including those declared as type names,
3986 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3988 c_parser_error (parser
, "expected identifier");
3992 = declare_label (c_parser_peek_token (parser
)->value
);
3993 C_DECLARED_LABEL_FLAG (label
) = 1;
3994 add_stmt (build_stmt (label_loc
, DECL_EXPR
, label
));
3995 c_parser_consume_token (parser
);
3996 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3997 c_parser_consume_token (parser
);
4001 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4003 pedwarn (label_loc
, OPT_pedantic
, "ISO C forbids label declarations");
4005 /* We must now have at least one statement, label or declaration. */
4006 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
4008 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4009 c_parser_error (parser
, "expected declaration or statement");
4010 c_parser_consume_token (parser
);
4013 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
4015 location_t loc
= c_parser_peek_token (parser
)->location
;
4016 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4017 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4018 || (c_parser_next_token_is (parser
, CPP_NAME
)
4019 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4021 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4022 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
4024 label_loc
= c_parser_peek_token (parser
)->location
;
4027 mark_valid_location_for_stdc_pragma (false);
4028 c_parser_label (parser
);
4030 else if (!last_label
4031 && c_parser_next_tokens_start_declaration (parser
))
4034 mark_valid_location_for_stdc_pragma (false);
4035 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
4038 (pedantic
&& !flag_isoc99
)
4040 : OPT_Wdeclaration_after_statement
,
4041 "ISO C90 forbids mixed declarations and code");
4044 else if (!last_label
4045 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4047 /* __extension__ can start a declaration, but is also an
4048 unary operator that can start an expression. Consume all
4049 but the last of a possible series of __extension__ to
4051 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4052 && (c_parser_peek_2nd_token (parser
)->keyword
4054 c_parser_consume_token (parser
);
4055 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4058 ext
= disable_extension_diagnostics ();
4059 c_parser_consume_token (parser
);
4061 mark_valid_location_for_stdc_pragma (false);
4062 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4064 /* Following the old parser, __extension__ does not
4065 disable this diagnostic. */
4066 restore_extension_diagnostics (ext
);
4068 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
4070 : OPT_Wdeclaration_after_statement
,
4071 "ISO C90 forbids mixed declarations and code");
4077 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
4079 /* External pragmas, and some omp pragmas, are not associated
4080 with regular c code, and so are not to be considered statements
4081 syntactically. This ensures that the user doesn't put them
4082 places that would turn into syntax errors if the directive
4084 if (c_parser_pragma (parser
, pragma_compound
))
4085 last_label
= false, last_stmt
= true;
4087 else if (c_parser_next_token_is (parser
, CPP_EOF
))
4089 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4090 c_parser_error (parser
, "expected declaration or statement");
4093 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4095 if (parser
->in_if_block
)
4097 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4098 error_at (loc
, """expected %<}%> before %<else%>");
4103 error_at (loc
, "%<else%> without a previous %<if%>");
4104 c_parser_consume_token (parser
);
4113 mark_valid_location_for_stdc_pragma (false);
4114 c_parser_statement_after_labels (parser
);
4117 parser
->error
= false;
4120 error_at (label_loc
, "label at end of compound statement");
4121 c_parser_consume_token (parser
);
4122 /* Restore the value we started with. */
4123 mark_valid_location_for_stdc_pragma (save_valid_for_pragma
);
4126 /* Parse a label (C90 6.6.1, C99 6.8.1).
4129 identifier : attributes[opt]
4130 case constant-expression :
4136 case constant-expression ... constant-expression :
4138 The use of attributes on labels is a GNU extension. The syntax in
4139 GNU C accepts any expressions without commas, non-constant
4140 expressions being rejected later. */
4143 c_parser_label (c_parser
*parser
)
4145 location_t loc1
= c_parser_peek_token (parser
)->location
;
4146 tree label
= NULL_TREE
;
4147 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
4150 c_parser_consume_token (parser
);
4151 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
4152 if (c_parser_next_token_is (parser
, CPP_COLON
))
4154 c_parser_consume_token (parser
);
4155 label
= do_case (loc1
, exp1
, NULL_TREE
);
4157 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
4159 c_parser_consume_token (parser
);
4160 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
4161 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4162 label
= do_case (loc1
, exp1
, exp2
);
4165 c_parser_error (parser
, "expected %<:%> or %<...%>");
4167 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
4169 c_parser_consume_token (parser
);
4170 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4171 label
= do_case (loc1
, NULL_TREE
, NULL_TREE
);
4175 tree name
= c_parser_peek_token (parser
)->value
;
4178 location_t loc2
= c_parser_peek_token (parser
)->location
;
4179 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
4180 c_parser_consume_token (parser
);
4181 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
4182 c_parser_consume_token (parser
);
4183 attrs
= c_parser_attributes (parser
);
4184 tlab
= define_label (loc2
, name
);
4187 decl_attributes (&tlab
, attrs
, 0);
4188 label
= add_stmt (build_stmt (loc1
, LABEL_EXPR
, tlab
));
4193 if (c_parser_next_tokens_start_declaration (parser
))
4195 error_at (c_parser_peek_token (parser
)->location
,
4196 "a label can only be part of a statement and "
4197 "a declaration is not a statement");
4198 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
4199 /*static_assert_ok*/ true,
4200 /*nested*/ true, /*empty_ok*/ false,
4201 /*start_attr_ok*/ true, NULL
);
4206 /* Parse a statement (C90 6.6, C99 6.8).
4211 expression-statement
4219 expression-statement:
4222 selection-statement:
4226 iteration-statement:
4235 return expression[opt] ;
4248 objc-throw-statement
4249 objc-try-catch-statement
4250 objc-synchronized-statement
4252 objc-throw-statement:
4266 parallel-for-construct
4267 parallel-sections-construct
4274 parallel-directive structured-block
4277 for-directive iteration-statement
4280 sections-directive section-scope
4283 single-directive structured-block
4285 parallel-for-construct:
4286 parallel-for-directive iteration-statement
4288 parallel-sections-construct:
4289 parallel-sections-directive section-scope
4292 master-directive structured-block
4295 critical-directive structured-block
4298 atomic-directive expression-statement
4301 ordered-directive structured-block */
4304 c_parser_statement (c_parser
*parser
)
4306 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4307 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4308 || (c_parser_next_token_is (parser
, CPP_NAME
)
4309 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4310 c_parser_label (parser
);
4311 c_parser_statement_after_labels (parser
);
4314 /* Parse a statement, other than a labeled statement. */
4317 c_parser_statement_after_labels (c_parser
*parser
)
4319 location_t loc
= c_parser_peek_token (parser
)->location
;
4320 tree stmt
= NULL_TREE
;
4321 bool in_if_block
= parser
->in_if_block
;
4322 parser
->in_if_block
= false;
4323 switch (c_parser_peek_token (parser
)->type
)
4325 case CPP_OPEN_BRACE
:
4326 add_stmt (c_parser_compound_statement (parser
));
4329 switch (c_parser_peek_token (parser
)->keyword
)
4332 c_parser_if_statement (parser
);
4335 c_parser_switch_statement (parser
);
4338 c_parser_while_statement (parser
);
4341 c_parser_do_statement (parser
);
4344 c_parser_for_statement (parser
);
4347 c_parser_consume_token (parser
);
4348 if (c_parser_next_token_is (parser
, CPP_NAME
))
4350 stmt
= c_finish_goto_label (loc
,
4351 c_parser_peek_token (parser
)->value
);
4352 c_parser_consume_token (parser
);
4354 else if (c_parser_next_token_is (parser
, CPP_MULT
))
4358 c_parser_consume_token (parser
);
4359 val
= c_parser_expression (parser
).value
;
4360 mark_exp_read (val
);
4361 stmt
= c_finish_goto_ptr (loc
, val
);
4364 c_parser_error (parser
, "expected identifier or %<*%>");
4365 goto expect_semicolon
;
4367 c_parser_consume_token (parser
);
4368 stmt
= c_finish_bc_stmt (loc
, &c_cont_label
, false);
4369 goto expect_semicolon
;
4371 c_parser_consume_token (parser
);
4372 stmt
= c_finish_bc_stmt (loc
, &c_break_label
, true);
4373 goto expect_semicolon
;
4375 c_parser_consume_token (parser
);
4376 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4378 stmt
= c_finish_return (loc
, NULL_TREE
, NULL_TREE
);
4379 c_parser_consume_token (parser
);
4383 struct c_expr expr
= c_parser_expression_conv (parser
);
4384 mark_exp_read (expr
.value
);
4385 stmt
= c_finish_return (loc
, expr
.value
, expr
.original_type
);
4386 goto expect_semicolon
;
4390 stmt
= c_parser_asm_statement (parser
);
4393 gcc_assert (c_dialect_objc ());
4394 c_parser_consume_token (parser
);
4395 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4397 stmt
= objc_build_throw_stmt (loc
, NULL_TREE
);
4398 c_parser_consume_token (parser
);
4402 tree expr
= c_parser_expression (parser
).value
;
4403 expr
= c_fully_fold (expr
, false, NULL
);
4404 stmt
= objc_build_throw_stmt (loc
, expr
);
4405 goto expect_semicolon
;
4409 gcc_assert (c_dialect_objc ());
4410 c_parser_objc_try_catch_finally_statement (parser
);
4412 case RID_AT_SYNCHRONIZED
:
4413 gcc_assert (c_dialect_objc ());
4414 c_parser_objc_synchronized_statement (parser
);
4421 c_parser_consume_token (parser
);
4423 case CPP_CLOSE_PAREN
:
4424 case CPP_CLOSE_SQUARE
:
4425 /* Avoid infinite loop in error recovery:
4426 c_parser_skip_until_found stops at a closing nesting
4427 delimiter without consuming it, but here we need to consume
4428 it to proceed further. */
4429 c_parser_error (parser
, "expected statement");
4430 c_parser_consume_token (parser
);
4433 c_parser_pragma (parser
, pragma_stmt
);
4437 stmt
= c_finish_expr_stmt (loc
, c_parser_expression_conv (parser
).value
);
4439 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4442 /* Two cases cannot and do not have line numbers associated: If stmt
4443 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
4444 cannot hold line numbers. But that's OK because the statement
4445 will either be changed to a MODIFY_EXPR during gimplification of
4446 the statement expr, or discarded. If stmt was compound, but
4447 without new variables, we will have skipped the creation of a
4448 BIND and will have a bare STATEMENT_LIST. But that's OK because
4449 (recursively) all of the component statements should already have
4450 line numbers assigned. ??? Can we discard no-op statements
4452 if (CAN_HAVE_LOCATION_P (stmt
)
4453 && EXPR_LOCATION (stmt
) == UNKNOWN_LOCATION
)
4454 SET_EXPR_LOCATION (stmt
, loc
);
4456 parser
->in_if_block
= in_if_block
;
4459 /* Parse the condition from an if, do, while or for statements. */
4462 c_parser_condition (c_parser
*parser
)
4464 location_t loc
= c_parser_peek_token (parser
)->location
;
4466 cond
= c_parser_expression_conv (parser
).value
;
4467 cond
= c_objc_common_truthvalue_conversion (loc
, cond
);
4468 cond
= c_fully_fold (cond
, false, NULL
);
4469 if (warn_sequence_point
)
4470 verify_sequence_points (cond
);
4474 /* Parse a parenthesized condition from an if, do or while statement.
4480 c_parser_paren_condition (c_parser
*parser
)
4483 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4484 return error_mark_node
;
4485 cond
= c_parser_condition (parser
);
4486 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4490 /* Parse a statement which is a block in C99. */
4493 c_parser_c99_block_statement (c_parser
*parser
)
4495 tree block
= c_begin_compound_stmt (flag_isoc99
);
4496 location_t loc
= c_parser_peek_token (parser
)->location
;
4497 c_parser_statement (parser
);
4498 return c_end_compound_stmt (loc
, block
, flag_isoc99
);
4501 /* Parse the body of an if statement. This is just parsing a
4502 statement but (a) it is a block in C99, (b) we track whether the
4503 body is an if statement for the sake of -Wparentheses warnings, (c)
4504 we handle an empty body specially for the sake of -Wempty-body
4505 warnings, and (d) we call parser_compound_statement directly
4506 because c_parser_statement_after_labels resets
4507 parser->in_if_block. */
4510 c_parser_if_body (c_parser
*parser
, bool *if_p
)
4512 tree block
= c_begin_compound_stmt (flag_isoc99
);
4513 location_t body_loc
= c_parser_peek_token (parser
)->location
;
4514 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4515 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4516 || (c_parser_next_token_is (parser
, CPP_NAME
)
4517 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4518 c_parser_label (parser
);
4519 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
4520 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4522 location_t loc
= c_parser_peek_token (parser
)->location
;
4523 add_stmt (build_empty_stmt (loc
));
4524 c_parser_consume_token (parser
);
4525 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4526 warning_at (loc
, OPT_Wempty_body
,
4527 "suggest braces around empty body in an %<if%> statement");
4529 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4530 add_stmt (c_parser_compound_statement (parser
));
4532 c_parser_statement_after_labels (parser
);
4533 return c_end_compound_stmt (body_loc
, block
, flag_isoc99
);
4536 /* Parse the else body of an if statement. This is just parsing a
4537 statement but (a) it is a block in C99, (b) we handle an empty body
4538 specially for the sake of -Wempty-body warnings. */
4541 c_parser_else_body (c_parser
*parser
)
4543 location_t else_loc
= c_parser_peek_token (parser
)->location
;
4544 tree block
= c_begin_compound_stmt (flag_isoc99
);
4545 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
4546 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
4547 || (c_parser_next_token_is (parser
, CPP_NAME
)
4548 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
4549 c_parser_label (parser
);
4550 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4552 location_t loc
= c_parser_peek_token (parser
)->location
;
4555 "suggest braces around empty body in an %<else%> statement");
4556 add_stmt (build_empty_stmt (loc
));
4557 c_parser_consume_token (parser
);
4560 c_parser_statement_after_labels (parser
);
4561 return c_end_compound_stmt (else_loc
, block
, flag_isoc99
);
4564 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
4567 if ( expression ) statement
4568 if ( expression ) statement else statement
4572 c_parser_if_statement (c_parser
*parser
)
4577 bool first_if
= false;
4578 tree first_body
, second_body
;
4581 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
4582 c_parser_consume_token (parser
);
4583 block
= c_begin_compound_stmt (flag_isoc99
);
4584 loc
= c_parser_peek_token (parser
)->location
;
4585 cond
= c_parser_paren_condition (parser
);
4586 in_if_block
= parser
->in_if_block
;
4587 parser
->in_if_block
= true;
4588 first_body
= c_parser_if_body (parser
, &first_if
);
4589 parser
->in_if_block
= in_if_block
;
4590 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
4592 c_parser_consume_token (parser
);
4593 second_body
= c_parser_else_body (parser
);
4596 second_body
= NULL_TREE
;
4597 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
4598 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4601 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
4604 switch (expression) statement
4608 c_parser_switch_statement (c_parser
*parser
)
4610 tree block
, expr
, body
, save_break
;
4611 location_t switch_loc
= c_parser_peek_token (parser
)->location
;
4612 location_t switch_cond_loc
;
4613 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
4614 c_parser_consume_token (parser
);
4615 block
= c_begin_compound_stmt (flag_isoc99
);
4616 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4618 switch_cond_loc
= c_parser_peek_token (parser
)->location
;
4619 expr
= c_parser_expression (parser
).value
;
4620 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4624 switch_cond_loc
= UNKNOWN_LOCATION
;
4625 expr
= error_mark_node
;
4627 c_start_case (switch_loc
, switch_cond_loc
, expr
);
4628 save_break
= c_break_label
;
4629 c_break_label
= NULL_TREE
;
4630 body
= c_parser_c99_block_statement (parser
);
4631 c_finish_case (body
);
4634 location_t here
= c_parser_peek_token (parser
)->location
;
4635 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_break_label
);
4636 SET_EXPR_LOCATION (t
, here
);
4639 c_break_label
= save_break
;
4640 add_stmt (c_end_compound_stmt (switch_loc
, block
, flag_isoc99
));
4643 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
4646 while (expression) statement
4650 c_parser_while_statement (c_parser
*parser
)
4652 tree block
, cond
, body
, save_break
, save_cont
;
4654 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
4655 c_parser_consume_token (parser
);
4656 block
= c_begin_compound_stmt (flag_isoc99
);
4657 loc
= c_parser_peek_token (parser
)->location
;
4658 cond
= c_parser_paren_condition (parser
);
4659 save_break
= c_break_label
;
4660 c_break_label
= NULL_TREE
;
4661 save_cont
= c_cont_label
;
4662 c_cont_label
= NULL_TREE
;
4663 body
= c_parser_c99_block_statement (parser
);
4664 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
4665 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4666 c_break_label
= save_break
;
4667 c_cont_label
= save_cont
;
4670 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4673 do statement while ( expression ) ;
4677 c_parser_do_statement (c_parser
*parser
)
4679 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4681 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4682 c_parser_consume_token (parser
);
4683 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4684 warning_at (c_parser_peek_token (parser
)->location
,
4686 "suggest braces around empty body in %<do%> statement");
4687 block
= c_begin_compound_stmt (flag_isoc99
);
4688 loc
= c_parser_peek_token (parser
)->location
;
4689 save_break
= c_break_label
;
4690 c_break_label
= NULL_TREE
;
4691 save_cont
= c_cont_label
;
4692 c_cont_label
= NULL_TREE
;
4693 body
= c_parser_c99_block_statement (parser
);
4694 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4695 new_break
= c_break_label
;
4696 c_break_label
= save_break
;
4697 new_cont
= c_cont_label
;
4698 c_cont_label
= save_cont
;
4699 cond
= c_parser_paren_condition (parser
);
4700 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4701 c_parser_skip_to_end_of_block_or_statement (parser
);
4702 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4703 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
));
4706 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4709 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4710 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4712 The form with a declaration is new in C99.
4714 ??? In accordance with the old parser, the declaration may be a
4715 nested function, which is then rejected in check_for_loop_decls,
4716 but does it make any sense for this to be included in the grammar?
4717 Note in particular that the nested function does not include a
4718 trailing ';', whereas the "declaration" production includes one.
4719 Also, can we reject bad declarations earlier and cheaper than
4720 check_for_loop_decls?
4722 In Objective-C, there are two additional variants:
4725 for ( expression in expresssion ) statement
4726 for ( declaration in expression ) statement
4728 This is inconsistent with C, because the second variant is allowed
4729 even if c99 is not enabled.
4731 The rest of the comment documents these Objective-C foreach-statement.
4733 Here is the canonical example of the first variant:
4734 for (object in array) { do something with object }
4735 we call the first expression ("object") the "object_expression" and
4736 the second expression ("array") the "collection_expression".
4737 object_expression must be an lvalue of type "id" (a generic Objective-C
4738 object) because the loop works by assigning to object_expression the
4739 various objects from the collection_expression. collection_expression
4740 must evaluate to something of type "id" which responds to the method
4741 countByEnumeratingWithState:objects:count:.
4743 The canonical example of the second variant is:
4744 for (id object in array) { do something with object }
4745 which is completely equivalent to
4748 for (object in array) { do something with object }
4750 Note that initizializing 'object' in some way (eg, "for ((object =
4751 xxx) in array) { do something with object }") is possibly
4752 technically valid, but completely pointless as 'object' will be
4753 assigned to something else as soon as the loop starts. We should
4754 most likely reject it (TODO).
4756 The beginning of the Objective-C foreach-statement looks exactly
4757 like the beginning of the for-statement, and we can tell it is a
4758 foreach-statement only because the initial declaration or
4759 expression is terminated by 'in' instead of ';'.
4763 c_parser_for_statement (c_parser
*parser
)
4765 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4766 /* The following are only used when parsing an ObjC foreach statement. */
4767 tree object_expression
;
4768 /* Silence the bogus uninitialized warning. */
4769 tree collection_expression
= NULL
;
4770 location_t loc
= c_parser_peek_token (parser
)->location
;
4771 location_t for_loc
= c_parser_peek_token (parser
)->location
;
4772 bool is_foreach_statement
= false;
4773 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4774 c_parser_consume_token (parser
);
4775 /* Open a compound statement in Objective-C as well, just in case this is
4776 as foreach expression. */
4777 block
= c_begin_compound_stmt (flag_isoc99
|| c_dialect_objc ());
4778 cond
= error_mark_node
;
4779 incr
= error_mark_node
;
4780 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4782 /* Parse the initialization declaration or expression. */
4783 object_expression
= error_mark_node
;
4784 parser
->objc_could_be_foreach_context
= c_dialect_objc ();
4785 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4787 parser
->objc_could_be_foreach_context
= false;
4788 c_parser_consume_token (parser
);
4789 c_finish_expr_stmt (loc
, NULL_TREE
);
4791 else if (c_parser_next_tokens_start_declaration (parser
))
4793 c_parser_declaration_or_fndef (parser
, true, true, true, true, true,
4794 &object_expression
);
4795 parser
->objc_could_be_foreach_context
= false;
4797 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4799 c_parser_consume_token (parser
);
4800 is_foreach_statement
= true;
4801 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4802 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4805 check_for_loop_decls (for_loc
, flag_isoc99
);
4807 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4809 /* __extension__ can start a declaration, but is also an
4810 unary operator that can start an expression. Consume all
4811 but the last of a possible series of __extension__ to
4813 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4814 && (c_parser_peek_2nd_token (parser
)->keyword
4816 c_parser_consume_token (parser
);
4817 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4820 ext
= disable_extension_diagnostics ();
4821 c_parser_consume_token (parser
);
4822 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4823 true, &object_expression
);
4824 parser
->objc_could_be_foreach_context
= false;
4826 restore_extension_diagnostics (ext
);
4827 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4829 c_parser_consume_token (parser
);
4830 is_foreach_statement
= true;
4831 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4832 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4835 check_for_loop_decls (for_loc
, flag_isoc99
);
4844 tree init_expression
;
4845 init_expression
= c_parser_expression (parser
).value
;
4846 parser
->objc_could_be_foreach_context
= false;
4847 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4849 c_parser_consume_token (parser
);
4850 is_foreach_statement
= true;
4851 if (! lvalue_p (init_expression
))
4852 c_parser_error (parser
, "invalid iterating variable in fast enumeration");
4853 object_expression
= c_fully_fold (init_expression
, false, NULL
);
4857 c_finish_expr_stmt (loc
, init_expression
);
4858 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4862 /* Parse the loop condition. In the case of a foreach
4863 statement, there is no loop condition. */
4864 gcc_assert (!parser
->objc_could_be_foreach_context
);
4865 if (!is_foreach_statement
)
4867 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4869 c_parser_consume_token (parser
);
4874 cond
= c_parser_condition (parser
);
4875 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4878 /* Parse the increment expression (the third expression in a
4879 for-statement). In the case of a foreach-statement, this is
4880 the expression that follows the 'in'. */
4881 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4883 if (is_foreach_statement
)
4885 c_parser_error (parser
, "missing collection in fast enumeration");
4886 collection_expression
= error_mark_node
;
4889 incr
= c_process_expr_stmt (loc
, NULL_TREE
);
4893 if (is_foreach_statement
)
4894 collection_expression
= c_fully_fold (c_parser_expression (parser
).value
,
4897 incr
= c_process_expr_stmt (loc
, c_parser_expression (parser
).value
);
4899 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4901 save_break
= c_break_label
;
4902 c_break_label
= NULL_TREE
;
4903 save_cont
= c_cont_label
;
4904 c_cont_label
= NULL_TREE
;
4905 body
= c_parser_c99_block_statement (parser
);
4906 if (is_foreach_statement
)
4907 objc_finish_foreach_loop (loc
, object_expression
, collection_expression
, body
, c_break_label
, c_cont_label
);
4909 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4910 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
|| c_dialect_objc ()));
4911 c_break_label
= save_break
;
4912 c_cont_label
= save_cont
;
4915 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4916 statement with inputs, outputs, clobbers, and volatile tag
4920 asm type-qualifier[opt] ( asm-argument ) ;
4921 asm type-qualifier[opt] goto ( asm-goto-argument ) ;
4925 asm-string-literal : asm-operands[opt]
4926 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4927 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
4930 asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
4933 Qualifiers other than volatile are accepted in the syntax but
4937 c_parser_asm_statement (c_parser
*parser
)
4939 tree quals
, str
, outputs
, inputs
, clobbers
, labels
, ret
;
4940 bool simple
, is_goto
;
4941 location_t asm_loc
= c_parser_peek_token (parser
)->location
;
4942 int section
, nsections
;
4944 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4945 c_parser_consume_token (parser
);
4946 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4948 quals
= c_parser_peek_token (parser
)->value
;
4949 c_parser_consume_token (parser
);
4951 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4952 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4954 warning_at (c_parser_peek_token (parser
)->location
,
4956 "%E qualifier ignored on asm",
4957 c_parser_peek_token (parser
)->value
);
4959 c_parser_consume_token (parser
);
4965 if (c_parser_next_token_is_keyword (parser
, RID_GOTO
))
4967 c_parser_consume_token (parser
);
4971 /* ??? Follow the C++ parser rather than using the
4972 lex_untranslated_string kludge. */
4973 parser
->lex_untranslated_string
= true;
4976 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4979 str
= c_parser_asm_string_literal (parser
);
4980 if (str
== NULL_TREE
)
4981 goto error_close_paren
;
4984 outputs
= NULL_TREE
;
4986 clobbers
= NULL_TREE
;
4989 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
4992 /* Parse each colon-delimited section of operands. */
4993 nsections
= 3 + is_goto
;
4994 for (section
= 0; section
< nsections
; ++section
)
4996 if (!c_parser_require (parser
, CPP_COLON
,
4999 : "expected %<:%> or %<)%>"))
5000 goto error_close_paren
;
5002 /* Once past any colon, we're no longer a simple asm. */
5005 if ((!c_parser_next_token_is (parser
, CPP_COLON
)
5006 && !c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5011 /* For asm goto, we don't allow output operands, but reserve
5012 the slot for a future extension that does allow them. */
5014 outputs
= c_parser_asm_operands (parser
, false);
5017 inputs
= c_parser_asm_operands (parser
, true);
5020 clobbers
= c_parser_asm_clobbers (parser
);
5023 labels
= c_parser_asm_goto_operands (parser
);
5029 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5034 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5036 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5040 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
5041 c_parser_skip_to_end_of_block_or_statement (parser
);
5043 ret
= build_asm_stmt (quals
, build_asm_expr (asm_loc
, str
, outputs
, inputs
,
5044 clobbers
, labels
, simple
));
5047 parser
->lex_untranslated_string
= false;
5051 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5055 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
5056 not outputs), apply the default conversion of functions and arrays
5061 asm-operands , asm-operand
5064 asm-string-literal ( expression )
5065 [ identifier ] asm-string-literal ( expression )
5069 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
5071 tree list
= NULL_TREE
;
5077 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
5079 c_parser_consume_token (parser
);
5080 if (c_parser_next_token_is (parser
, CPP_NAME
))
5082 tree id
= c_parser_peek_token (parser
)->value
;
5083 c_parser_consume_token (parser
);
5084 name
= build_string (IDENTIFIER_LENGTH (id
),
5085 IDENTIFIER_POINTER (id
));
5089 c_parser_error (parser
, "expected identifier");
5090 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
5093 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5098 str
= c_parser_asm_string_literal (parser
);
5099 if (str
== NULL_TREE
)
5101 parser
->lex_untranslated_string
= false;
5102 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5104 parser
->lex_untranslated_string
= true;
5107 loc
= c_parser_peek_token (parser
)->location
;
5108 expr
= c_parser_expression (parser
);
5109 mark_exp_read (expr
.value
);
5111 expr
= default_function_array_conversion (loc
, expr
);
5112 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5113 parser
->lex_untranslated_string
= true;
5114 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5116 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5119 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
5121 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5122 c_parser_consume_token (parser
);
5129 /* Parse asm clobbers, a GNU extension.
5133 asm-clobbers , asm-string-literal
5137 c_parser_asm_clobbers (c_parser
*parser
)
5139 tree list
= NULL_TREE
;
5142 tree str
= c_parser_asm_string_literal (parser
);
5144 list
= tree_cons (NULL_TREE
, str
, list
);
5147 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5148 c_parser_consume_token (parser
);
5155 /* Parse asm goto labels, a GNU extension.
5159 asm-goto-operands , identifier
5163 c_parser_asm_goto_operands (c_parser
*parser
)
5165 tree list
= NULL_TREE
;
5170 if (c_parser_next_token_is (parser
, CPP_NAME
))
5172 c_token
*tok
= c_parser_peek_token (parser
);
5174 label
= lookup_label_for_goto (tok
->location
, name
);
5175 c_parser_consume_token (parser
);
5176 TREE_USED (label
) = 1;
5180 c_parser_error (parser
, "expected identifier");
5184 name
= build_string (IDENTIFIER_LENGTH (name
),
5185 IDENTIFIER_POINTER (name
));
5186 list
= tree_cons (name
, label
, list
);
5187 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5188 c_parser_consume_token (parser
);
5190 return nreverse (list
);
5194 /* Parse an expression other than a compound expression; that is, an
5195 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
5196 NULL then it is an Objective-C message expression which is the
5197 primary-expression starting the expression as an initializer.
5199 assignment-expression:
5200 conditional-expression
5201 unary-expression assignment-operator assignment-expression
5203 assignment-operator: one of
5204 = *= /= %= += -= <<= >>= &= ^= |=
5206 In GNU C we accept any conditional expression on the LHS and
5207 diagnose the invalid lvalue rather than producing a syntax
5210 static struct c_expr
5211 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
5213 struct c_expr lhs
, rhs
, ret
;
5214 enum tree_code code
;
5215 location_t op_location
, exp_location
;
5216 gcc_assert (!after
|| c_dialect_objc ());
5217 lhs
= c_parser_conditional_expression (parser
, after
);
5218 op_location
= c_parser_peek_token (parser
)->location
;
5219 switch (c_parser_peek_token (parser
)->type
)
5228 code
= TRUNC_DIV_EXPR
;
5231 code
= TRUNC_MOD_EXPR
;
5246 code
= BIT_AND_EXPR
;
5249 code
= BIT_XOR_EXPR
;
5252 code
= BIT_IOR_EXPR
;
5257 c_parser_consume_token (parser
);
5258 exp_location
= c_parser_peek_token (parser
)->location
;
5259 rhs
= c_parser_expr_no_commas (parser
, NULL
);
5260 rhs
= default_function_array_read_conversion (exp_location
, rhs
);
5261 ret
.value
= build_modify_expr (op_location
, lhs
.value
, lhs
.original_type
,
5262 code
, exp_location
, rhs
.value
,
5264 if (code
== NOP_EXPR
)
5265 ret
.original_code
= MODIFY_EXPR
;
5268 TREE_NO_WARNING (ret
.value
) = 1;
5269 ret
.original_code
= ERROR_MARK
;
5271 ret
.original_type
= NULL
;
5275 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
5276 is not NULL then it is an Objective-C message expression which is
5277 the primary-expression starting the expression as an initializer.
5279 conditional-expression:
5280 logical-OR-expression
5281 logical-OR-expression ? expression : conditional-expression
5285 conditional-expression:
5286 logical-OR-expression ? : conditional-expression
5289 static struct c_expr
5290 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
5292 struct c_expr cond
, exp1
, exp2
, ret
;
5293 location_t cond_loc
, colon_loc
, middle_loc
;
5295 gcc_assert (!after
|| c_dialect_objc ());
5297 cond
= c_parser_binary_expression (parser
, after
);
5299 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
5301 cond_loc
= c_parser_peek_token (parser
)->location
;
5302 cond
= default_function_array_read_conversion (cond_loc
, cond
);
5303 c_parser_consume_token (parser
);
5304 if (c_parser_next_token_is (parser
, CPP_COLON
))
5306 tree eptype
= NULL_TREE
;
5308 middle_loc
= c_parser_peek_token (parser
)->location
;
5309 pedwarn (middle_loc
, OPT_pedantic
,
5310 "ISO C forbids omitting the middle term of a ?: expression");
5311 warn_for_omitted_condop (middle_loc
, cond
.value
);
5312 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
5314 eptype
= TREE_TYPE (cond
.value
);
5315 cond
.value
= TREE_OPERAND (cond
.value
, 0);
5317 /* Make sure first operand is calculated only once. */
5318 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
5320 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
5321 exp1
.original_type
= NULL
;
5322 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
5323 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_true_node
;
5328 = c_objc_common_truthvalue_conversion
5329 (cond_loc
, default_conversion (cond
.value
));
5330 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_false_node
;
5331 exp1
= c_parser_expression_conv (parser
);
5332 mark_exp_read (exp1
.value
);
5333 c_inhibit_evaluation_warnings
+=
5334 ((cond
.value
== truthvalue_true_node
)
5335 - (cond
.value
== truthvalue_false_node
));
5338 colon_loc
= c_parser_peek_token (parser
)->location
;
5339 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
5341 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5342 ret
.value
= error_mark_node
;
5343 ret
.original_code
= ERROR_MARK
;
5344 ret
.original_type
= NULL
;
5348 location_t exp2_loc
= c_parser_peek_token (parser
)->location
;
5349 exp2
= c_parser_conditional_expression (parser
, NULL
);
5350 exp2
= default_function_array_read_conversion (exp2_loc
, exp2
);
5352 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5353 ret
.value
= build_conditional_expr (colon_loc
, cond
.value
,
5354 cond
.original_code
== C_MAYBE_CONST_EXPR
,
5355 exp1
.value
, exp1
.original_type
,
5356 exp2
.value
, exp2
.original_type
);
5357 ret
.original_code
= ERROR_MARK
;
5358 if (exp1
.value
== error_mark_node
|| exp2
.value
== error_mark_node
)
5359 ret
.original_type
= NULL
;
5364 /* If both sides are enum type, the default conversion will have
5365 made the type of the result be an integer type. We want to
5366 remember the enum types we started with. */
5367 t1
= exp1
.original_type
? exp1
.original_type
: TREE_TYPE (exp1
.value
);
5368 t2
= exp2
.original_type
? exp2
.original_type
: TREE_TYPE (exp2
.value
);
5369 ret
.original_type
= ((t1
!= error_mark_node
5370 && t2
!= error_mark_node
5371 && (TYPE_MAIN_VARIANT (t1
)
5372 == TYPE_MAIN_VARIANT (t2
)))
5379 /* Parse a binary expression; that is, a logical-OR-expression (C90
5380 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
5381 an Objective-C message expression which is the primary-expression
5382 starting the expression as an initializer.
5384 multiplicative-expression:
5386 multiplicative-expression * cast-expression
5387 multiplicative-expression / cast-expression
5388 multiplicative-expression % cast-expression
5390 additive-expression:
5391 multiplicative-expression
5392 additive-expression + multiplicative-expression
5393 additive-expression - multiplicative-expression
5397 shift-expression << additive-expression
5398 shift-expression >> additive-expression
5400 relational-expression:
5402 relational-expression < shift-expression
5403 relational-expression > shift-expression
5404 relational-expression <= shift-expression
5405 relational-expression >= shift-expression
5407 equality-expression:
5408 relational-expression
5409 equality-expression == relational-expression
5410 equality-expression != relational-expression
5414 AND-expression & equality-expression
5416 exclusive-OR-expression:
5418 exclusive-OR-expression ^ AND-expression
5420 inclusive-OR-expression:
5421 exclusive-OR-expression
5422 inclusive-OR-expression | exclusive-OR-expression
5424 logical-AND-expression:
5425 inclusive-OR-expression
5426 logical-AND-expression && inclusive-OR-expression
5428 logical-OR-expression:
5429 logical-AND-expression
5430 logical-OR-expression || logical-AND-expression
5433 static struct c_expr
5434 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
5436 /* A binary expression is parsed using operator-precedence parsing,
5437 with the operands being cast expressions. All the binary
5438 operators are left-associative. Thus a binary expression is of
5441 E0 op1 E1 op2 E2 ...
5443 which we represent on a stack. On the stack, the precedence
5444 levels are strictly increasing. When a new operator is
5445 encountered of higher precedence than that at the top of the
5446 stack, it is pushed; its LHS is the top expression, and its RHS
5447 is everything parsed until it is popped. When a new operator is
5448 encountered with precedence less than or equal to that at the top
5449 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
5450 by the result of the operation until the operator at the top of
5451 the stack has lower precedence than the new operator or there is
5452 only one element on the stack; then the top expression is the LHS
5453 of the new operator. In the case of logical AND and OR
5454 expressions, we also need to adjust c_inhibit_evaluation_warnings
5455 as appropriate when the operators are pushed and popped. */
5457 /* The precedence levels, where 0 is a dummy lowest level used for
5458 the bottom of the stack. */
5474 /* The expression at this stack level. */
5476 /* The precedence of the operator on its left, PREC_NONE at the
5477 bottom of the stack. */
5479 /* The operation on its left. */
5481 /* The source location of this operation. */
5485 /* Location of the binary operator. */
5486 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
5489 switch (stack[sp].op) \
5491 case TRUTH_ANDIF_EXPR: \
5492 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5493 == truthvalue_false_node); \
5495 case TRUTH_ORIF_EXPR: \
5496 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5497 == truthvalue_true_node); \
5502 stack[sp - 1].expr \
5503 = default_function_array_read_conversion (stack[sp - 1].loc, \
5504 stack[sp - 1].expr); \
5506 = default_function_array_read_conversion (stack[sp].loc, \
5508 stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \
5510 stack[sp - 1].expr, \
5514 gcc_assert (!after
|| c_dialect_objc ());
5515 stack
[0].loc
= c_parser_peek_token (parser
)->location
;
5516 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
5517 stack
[0].prec
= PREC_NONE
;
5522 enum tree_code ocode
;
5525 switch (c_parser_peek_token (parser
)->type
)
5533 ocode
= TRUNC_DIV_EXPR
;
5537 ocode
= TRUNC_MOD_EXPR
;
5549 ocode
= LSHIFT_EXPR
;
5553 ocode
= RSHIFT_EXPR
;
5567 case CPP_GREATER_EQ
:
5580 oprec
= PREC_BITAND
;
5581 ocode
= BIT_AND_EXPR
;
5584 oprec
= PREC_BITXOR
;
5585 ocode
= BIT_XOR_EXPR
;
5589 ocode
= BIT_IOR_EXPR
;
5592 oprec
= PREC_LOGAND
;
5593 ocode
= TRUTH_ANDIF_EXPR
;
5597 ocode
= TRUTH_ORIF_EXPR
;
5600 /* Not a binary operator, so end of the binary
5604 binary_loc
= c_parser_peek_token (parser
)->location
;
5605 c_parser_consume_token (parser
);
5606 while (oprec
<= stack
[sp
].prec
)
5610 case TRUTH_ANDIF_EXPR
:
5612 = default_function_array_read_conversion (stack
[sp
].loc
,
5614 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5615 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5616 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5617 == truthvalue_false_node
);
5619 case TRUTH_ORIF_EXPR
:
5621 = default_function_array_read_conversion (stack
[sp
].loc
,
5623 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5624 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5625 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5626 == truthvalue_true_node
);
5632 stack
[sp
].loc
= binary_loc
;
5633 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
5634 stack
[sp
].prec
= oprec
;
5635 stack
[sp
].op
= ocode
;
5636 stack
[sp
].loc
= binary_loc
;
5641 return stack
[0].expr
;
5645 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
5646 NULL then it is an Objective-C message expression which is the
5647 primary-expression starting the expression as an initializer.
5651 ( type-name ) unary-expression
5654 static struct c_expr
5655 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
5657 location_t cast_loc
= c_parser_peek_token (parser
)->location
;
5658 gcc_assert (!after
|| c_dialect_objc ());
5660 return c_parser_postfix_expression_after_primary (parser
,
5662 /* If the expression begins with a parenthesized type name, it may
5663 be either a cast or a compound literal; we need to see whether
5664 the next character is '{' to tell the difference. If not, it is
5665 an unary expression. Full detection of unknown typenames here
5666 would require a 3-token lookahead. */
5667 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5668 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5670 struct c_type_name
*type_name
;
5673 c_parser_consume_token (parser
);
5674 type_name
= c_parser_type_name (parser
);
5675 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5676 if (type_name
== NULL
)
5678 ret
.value
= error_mark_node
;
5679 ret
.original_code
= ERROR_MARK
;
5680 ret
.original_type
= NULL
;
5684 /* Save casted types in the function's used types hash table. */
5685 used_types_insert (type_name
->specs
->type
);
5687 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5688 return c_parser_postfix_expression_after_paren_type (parser
, type_name
,
5691 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
5692 expr
= c_parser_cast_expression (parser
, NULL
);
5693 expr
= default_function_array_read_conversion (expr_loc
, expr
);
5695 ret
.value
= c_cast_expr (cast_loc
, type_name
, expr
.value
);
5696 ret
.original_code
= ERROR_MARK
;
5697 ret
.original_type
= NULL
;
5701 return c_parser_unary_expression (parser
);
5704 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
5710 unary-operator cast-expression
5711 sizeof unary-expression
5712 sizeof ( type-name )
5714 unary-operator: one of
5720 __alignof__ unary-expression
5721 __alignof__ ( type-name )
5724 unary-operator: one of
5725 __extension__ __real__ __imag__
5727 In addition, the GNU syntax treats ++ and -- as unary operators, so
5728 they may be applied to cast expressions with errors for non-lvalues
5731 static struct c_expr
5732 c_parser_unary_expression (c_parser
*parser
)
5735 struct c_expr ret
, op
;
5736 location_t op_loc
= c_parser_peek_token (parser
)->location
;
5738 ret
.original_code
= ERROR_MARK
;
5739 ret
.original_type
= NULL
;
5740 switch (c_parser_peek_token (parser
)->type
)
5743 c_parser_consume_token (parser
);
5744 exp_loc
= c_parser_peek_token (parser
)->location
;
5745 op
= c_parser_cast_expression (parser
, NULL
);
5746 op
= default_function_array_read_conversion (exp_loc
, op
);
5747 return parser_build_unary_op (op_loc
, PREINCREMENT_EXPR
, op
);
5748 case CPP_MINUS_MINUS
:
5749 c_parser_consume_token (parser
);
5750 exp_loc
= c_parser_peek_token (parser
)->location
;
5751 op
= c_parser_cast_expression (parser
, NULL
);
5752 op
= default_function_array_read_conversion (exp_loc
, op
);
5753 return parser_build_unary_op (op_loc
, PREDECREMENT_EXPR
, op
);
5755 c_parser_consume_token (parser
);
5756 op
= c_parser_cast_expression (parser
, NULL
);
5757 mark_exp_read (op
.value
);
5758 return parser_build_unary_op (op_loc
, ADDR_EXPR
, op
);
5760 c_parser_consume_token (parser
);
5761 exp_loc
= c_parser_peek_token (parser
)->location
;
5762 op
= c_parser_cast_expression (parser
, NULL
);
5763 op
= default_function_array_read_conversion (exp_loc
, op
);
5764 ret
.value
= build_indirect_ref (op_loc
, op
.value
, RO_UNARY_STAR
);
5767 if (!c_dialect_objc () && !in_system_header
)
5770 "traditional C rejects the unary plus operator");
5771 c_parser_consume_token (parser
);
5772 exp_loc
= c_parser_peek_token (parser
)->location
;
5773 op
= c_parser_cast_expression (parser
, NULL
);
5774 op
= default_function_array_read_conversion (exp_loc
, op
);
5775 return parser_build_unary_op (op_loc
, CONVERT_EXPR
, op
);
5777 c_parser_consume_token (parser
);
5778 exp_loc
= c_parser_peek_token (parser
)->location
;
5779 op
= c_parser_cast_expression (parser
, NULL
);
5780 op
= default_function_array_read_conversion (exp_loc
, op
);
5781 return parser_build_unary_op (op_loc
, NEGATE_EXPR
, op
);
5783 c_parser_consume_token (parser
);
5784 exp_loc
= c_parser_peek_token (parser
)->location
;
5785 op
= c_parser_cast_expression (parser
, NULL
);
5786 op
= default_function_array_read_conversion (exp_loc
, op
);
5787 return parser_build_unary_op (op_loc
, BIT_NOT_EXPR
, op
);
5789 c_parser_consume_token (parser
);
5790 exp_loc
= c_parser_peek_token (parser
)->location
;
5791 op
= c_parser_cast_expression (parser
, NULL
);
5792 op
= default_function_array_read_conversion (exp_loc
, op
);
5793 return parser_build_unary_op (op_loc
, TRUTH_NOT_EXPR
, op
);
5795 /* Refer to the address of a label as a pointer. */
5796 c_parser_consume_token (parser
);
5797 if (c_parser_next_token_is (parser
, CPP_NAME
))
5799 ret
.value
= finish_label_address_expr
5800 (c_parser_peek_token (parser
)->value
, op_loc
);
5801 c_parser_consume_token (parser
);
5805 c_parser_error (parser
, "expected identifier");
5806 ret
.value
= error_mark_node
;
5810 switch (c_parser_peek_token (parser
)->keyword
)
5813 return c_parser_sizeof_expression (parser
);
5815 return c_parser_alignof_expression (parser
);
5817 c_parser_consume_token (parser
);
5818 ext
= disable_extension_diagnostics ();
5819 ret
= c_parser_cast_expression (parser
, NULL
);
5820 restore_extension_diagnostics (ext
);
5823 c_parser_consume_token (parser
);
5824 exp_loc
= c_parser_peek_token (parser
)->location
;
5825 op
= c_parser_cast_expression (parser
, NULL
);
5826 op
= default_function_array_conversion (exp_loc
, op
);
5827 return parser_build_unary_op (op_loc
, REALPART_EXPR
, op
);
5829 c_parser_consume_token (parser
);
5830 exp_loc
= c_parser_peek_token (parser
)->location
;
5831 op
= c_parser_cast_expression (parser
, NULL
);
5832 op
= default_function_array_conversion (exp_loc
, op
);
5833 return parser_build_unary_op (op_loc
, IMAGPART_EXPR
, op
);
5835 return c_parser_postfix_expression (parser
);
5838 return c_parser_postfix_expression (parser
);
5842 /* Parse a sizeof expression. */
5844 static struct c_expr
5845 c_parser_sizeof_expression (c_parser
*parser
)
5848 location_t expr_loc
;
5849 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
5850 c_parser_consume_token (parser
);
5851 c_inhibit_evaluation_warnings
++;
5853 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5854 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5856 /* Either sizeof ( type-name ) or sizeof unary-expression
5857 starting with a compound literal. */
5858 struct c_type_name
*type_name
;
5859 c_parser_consume_token (parser
);
5860 expr_loc
= c_parser_peek_token (parser
)->location
;
5861 type_name
= c_parser_type_name (parser
);
5862 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5863 if (type_name
== NULL
)
5866 c_inhibit_evaluation_warnings
--;
5868 ret
.value
= error_mark_node
;
5869 ret
.original_code
= ERROR_MARK
;
5870 ret
.original_type
= NULL
;
5873 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5875 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5880 /* sizeof ( type-name ). */
5881 c_inhibit_evaluation_warnings
--;
5883 return c_expr_sizeof_type (expr_loc
, type_name
);
5887 expr_loc
= c_parser_peek_token (parser
)->location
;
5888 expr
= c_parser_unary_expression (parser
);
5890 c_inhibit_evaluation_warnings
--;
5892 mark_exp_read (expr
.value
);
5893 if (TREE_CODE (expr
.value
) == COMPONENT_REF
5894 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
5895 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
5896 return c_expr_sizeof_expr (expr_loc
, expr
);
5900 /* Parse an alignof expression. */
5902 static struct c_expr
5903 c_parser_alignof_expression (c_parser
*parser
)
5906 location_t loc
= c_parser_peek_token (parser
)->location
;
5907 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
5908 c_parser_consume_token (parser
);
5909 c_inhibit_evaluation_warnings
++;
5911 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5912 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5914 /* Either __alignof__ ( type-name ) or __alignof__
5915 unary-expression starting with a compound literal. */
5917 struct c_type_name
*type_name
;
5919 c_parser_consume_token (parser
);
5920 loc
= c_parser_peek_token (parser
)->location
;
5921 type_name
= c_parser_type_name (parser
);
5922 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5923 if (type_name
== NULL
)
5926 c_inhibit_evaluation_warnings
--;
5928 ret
.value
= error_mark_node
;
5929 ret
.original_code
= ERROR_MARK
;
5930 ret
.original_type
= NULL
;
5933 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5935 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5940 /* alignof ( type-name ). */
5941 c_inhibit_evaluation_warnings
--;
5943 ret
.value
= c_alignof (loc
, groktypename (type_name
, NULL
, NULL
));
5944 ret
.original_code
= ERROR_MARK
;
5945 ret
.original_type
= NULL
;
5951 expr
= c_parser_unary_expression (parser
);
5953 mark_exp_read (expr
.value
);
5954 c_inhibit_evaluation_warnings
--;
5956 ret
.value
= c_alignof_expr (loc
, expr
.value
);
5957 ret
.original_code
= ERROR_MARK
;
5958 ret
.original_type
= NULL
;
5963 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5967 postfix-expression [ expression ]
5968 postfix-expression ( argument-expression-list[opt] )
5969 postfix-expression . identifier
5970 postfix-expression -> identifier
5971 postfix-expression ++
5972 postfix-expression --
5973 ( type-name ) { initializer-list }
5974 ( type-name ) { initializer-list , }
5976 argument-expression-list:
5978 argument-expression-list , argument-expression
5990 (treated as a keyword in GNU C)
5993 ( compound-statement )
5994 __builtin_va_arg ( assignment-expression , type-name )
5995 __builtin_offsetof ( type-name , offsetof-member-designator )
5996 __builtin_choose_expr ( assignment-expression ,
5997 assignment-expression ,
5998 assignment-expression )
5999 __builtin_types_compatible_p ( type-name , type-name )
6001 offsetof-member-designator:
6003 offsetof-member-designator . identifier
6004 offsetof-member-designator [ expression ]
6009 [ objc-receiver objc-message-args ]
6010 @selector ( objc-selector-arg )
6011 @protocol ( identifier )
6012 @encode ( type-name )
6014 Classname . identifier
6017 static struct c_expr
6018 c_parser_postfix_expression (c_parser
*parser
)
6020 struct c_expr expr
, e1
, e2
, e3
;
6021 struct c_type_name
*t1
, *t2
;
6022 location_t loc
= c_parser_peek_token (parser
)->location
;;
6023 expr
.original_code
= ERROR_MARK
;
6024 expr
.original_type
= NULL
;
6025 switch (c_parser_peek_token (parser
)->type
)
6028 expr
.value
= c_parser_peek_token (parser
)->value
;
6029 loc
= c_parser_peek_token (parser
)->location
;
6030 c_parser_consume_token (parser
);
6031 if (TREE_CODE (expr
.value
) == FIXED_CST
6032 && !targetm
.fixed_point_supported_p ())
6034 error_at (loc
, "fixed-point types not supported for this target");
6035 expr
.value
= error_mark_node
;
6042 expr
.value
= c_parser_peek_token (parser
)->value
;
6043 c_parser_consume_token (parser
);
6049 case CPP_UTF8STRING
:
6050 expr
.value
= c_parser_peek_token (parser
)->value
;
6051 expr
.original_code
= STRING_CST
;
6052 c_parser_consume_token (parser
);
6054 case CPP_OBJC_STRING
:
6055 gcc_assert (c_dialect_objc ());
6057 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
6058 c_parser_consume_token (parser
);
6061 switch (c_parser_peek_token (parser
)->id_kind
)
6065 tree id
= c_parser_peek_token (parser
)->value
;
6066 c_parser_consume_token (parser
);
6067 expr
.value
= build_external_ref (loc
, id
,
6068 (c_parser_peek_token (parser
)->type
6070 &expr
.original_type
);
6073 case C_ID_CLASSNAME
:
6075 /* Here we parse the Objective-C 2.0 Class.name dot
6077 tree class_name
= c_parser_peek_token (parser
)->value
;
6079 c_parser_consume_token (parser
);
6080 gcc_assert (c_dialect_objc ());
6081 if (!c_parser_require (parser
, CPP_DOT
, "expected %<.%>"))
6083 expr
.value
= error_mark_node
;
6086 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6088 c_parser_error (parser
, "expected identifier");
6089 expr
.value
= error_mark_node
;
6092 component
= c_parser_peek_token (parser
)->value
;
6093 c_parser_consume_token (parser
);
6094 expr
.value
= objc_build_class_component_ref (class_name
,
6099 c_parser_error (parser
, "expected expression");
6100 expr
.value
= error_mark_node
;
6104 case CPP_OPEN_PAREN
:
6105 /* A parenthesized expression, statement expression or compound
6107 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
6109 /* A statement expression. */
6111 location_t brace_loc
;
6112 c_parser_consume_token (parser
);
6113 brace_loc
= c_parser_peek_token (parser
)->location
;
6114 c_parser_consume_token (parser
);
6115 if (cur_stmt_list
== NULL
)
6117 error_at (loc
, "braced-group within expression allowed "
6118 "only inside a function");
6119 parser
->error
= true;
6120 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
6121 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6122 expr
.value
= error_mark_node
;
6125 stmt
= c_begin_stmt_expr ();
6126 c_parser_compound_statement_nostart (parser
);
6127 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6129 pedwarn (loc
, OPT_pedantic
,
6130 "ISO C forbids braced-groups within expressions");
6131 expr
.value
= c_finish_stmt_expr (brace_loc
, stmt
);
6132 mark_exp_read (expr
.value
);
6134 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
6136 /* A compound literal. ??? Can we actually get here rather
6137 than going directly to
6138 c_parser_postfix_expression_after_paren_type from
6141 struct c_type_name
*type_name
;
6142 c_parser_consume_token (parser
);
6143 loc
= c_parser_peek_token (parser
)->location
;
6144 type_name
= c_parser_type_name (parser
);
6145 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6147 if (type_name
== NULL
)
6149 expr
.value
= error_mark_node
;
6152 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6158 /* A parenthesized expression. */
6159 c_parser_consume_token (parser
);
6160 expr
= c_parser_expression (parser
);
6161 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
6162 TREE_NO_WARNING (expr
.value
) = 1;
6163 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
6164 expr
.original_code
= ERROR_MARK
;
6165 /* Don't change EXPR.ORIGINAL_TYPE. */
6166 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6171 switch (c_parser_peek_token (parser
)->keyword
)
6173 case RID_FUNCTION_NAME
:
6174 case RID_PRETTY_FUNCTION_NAME
:
6175 case RID_C99_FUNCTION_NAME
:
6176 expr
.value
= fname_decl (loc
,
6177 c_parser_peek_token (parser
)->keyword
,
6178 c_parser_peek_token (parser
)->value
);
6179 c_parser_consume_token (parser
);
6182 c_parser_consume_token (parser
);
6183 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6185 expr
.value
= error_mark_node
;
6188 e1
= c_parser_expr_no_commas (parser
, NULL
);
6189 mark_exp_read (e1
.value
);
6190 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
6191 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6193 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6194 expr
.value
= error_mark_node
;
6197 loc
= c_parser_peek_token (parser
)->location
;
6198 t1
= c_parser_type_name (parser
);
6199 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6203 expr
.value
= error_mark_node
;
6207 tree type_expr
= NULL_TREE
;
6208 expr
.value
= c_build_va_arg (loc
, e1
.value
,
6209 groktypename (t1
, &type_expr
, NULL
));
6212 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
6213 TREE_TYPE (expr
.value
), type_expr
,
6215 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
6220 c_parser_consume_token (parser
);
6221 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6223 expr
.value
= error_mark_node
;
6226 t1
= c_parser_type_name (parser
);
6228 parser
->error
= true;
6229 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6230 gcc_assert (parser
->error
);
6233 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6234 expr
.value
= error_mark_node
;
6239 tree type
= groktypename (t1
, NULL
, NULL
);
6241 if (type
== error_mark_node
)
6242 offsetof_ref
= error_mark_node
;
6245 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
6246 SET_EXPR_LOCATION (offsetof_ref
, loc
);
6248 /* Parse the second argument to __builtin_offsetof. We
6249 must have one identifier, and beyond that we want to
6250 accept sub structure and sub array references. */
6251 if (c_parser_next_token_is (parser
, CPP_NAME
))
6253 offsetof_ref
= build_component_ref
6254 (loc
, offsetof_ref
, c_parser_peek_token (parser
)->value
);
6255 c_parser_consume_token (parser
);
6256 while (c_parser_next_token_is (parser
, CPP_DOT
)
6257 || c_parser_next_token_is (parser
,
6259 || c_parser_next_token_is (parser
,
6262 if (c_parser_next_token_is (parser
, CPP_DEREF
))
6264 loc
= c_parser_peek_token (parser
)->location
;
6265 offsetof_ref
= build_array_ref (loc
,
6270 else if (c_parser_next_token_is (parser
, CPP_DOT
))
6273 c_parser_consume_token (parser
);
6274 if (c_parser_next_token_is_not (parser
,
6277 c_parser_error (parser
, "expected identifier");
6280 offsetof_ref
= build_component_ref
6282 c_parser_peek_token (parser
)->value
);
6283 c_parser_consume_token (parser
);
6288 loc
= c_parser_peek_token (parser
)->location
;
6289 c_parser_consume_token (parser
);
6290 idx
= c_parser_expression (parser
).value
;
6291 idx
= c_fully_fold (idx
, false, NULL
);
6292 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6294 offsetof_ref
= build_array_ref (loc
, offsetof_ref
, idx
);
6299 c_parser_error (parser
, "expected identifier");
6300 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6302 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
6305 case RID_CHOOSE_EXPR
:
6306 c_parser_consume_token (parser
);
6307 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6309 expr
.value
= error_mark_node
;
6312 loc
= c_parser_peek_token (parser
)->location
;
6313 e1
= c_parser_expr_no_commas (parser
, NULL
);
6314 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6316 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6317 expr
.value
= error_mark_node
;
6320 e2
= c_parser_expr_no_commas (parser
, NULL
);
6321 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6323 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6324 expr
.value
= error_mark_node
;
6327 e3
= c_parser_expr_no_commas (parser
, NULL
);
6328 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6334 mark_exp_read (e2
.value
);
6335 mark_exp_read (e3
.value
);
6336 if (TREE_CODE (c
) != INTEGER_CST
6337 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
6339 "first argument to %<__builtin_choose_expr%> not"
6341 constant_expression_warning (c
);
6342 expr
= integer_zerop (c
) ? e3
: e2
;
6345 case RID_TYPES_COMPATIBLE_P
:
6346 c_parser_consume_token (parser
);
6347 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6349 expr
.value
= error_mark_node
;
6352 t1
= c_parser_type_name (parser
);
6355 expr
.value
= error_mark_node
;
6358 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6360 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6361 expr
.value
= error_mark_node
;
6364 t2
= c_parser_type_name (parser
);
6367 expr
.value
= error_mark_node
;
6370 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6375 e1
= TYPE_MAIN_VARIANT (groktypename (t1
, NULL
, NULL
));
6376 e2
= TYPE_MAIN_VARIANT (groktypename (t2
, NULL
, NULL
));
6379 = comptypes (e1
, e2
) ? integer_one_node
: integer_zero_node
;
6382 case RID_AT_SELECTOR
:
6383 gcc_assert (c_dialect_objc ());
6384 c_parser_consume_token (parser
);
6385 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6387 expr
.value
= error_mark_node
;
6391 tree sel
= c_parser_objc_selector_arg (parser
);
6392 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6394 expr
.value
= objc_build_selector_expr (loc
, sel
);
6397 case RID_AT_PROTOCOL
:
6398 gcc_assert (c_dialect_objc ());
6399 c_parser_consume_token (parser
);
6400 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6402 expr
.value
= error_mark_node
;
6405 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6407 c_parser_error (parser
, "expected identifier");
6408 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6409 expr
.value
= error_mark_node
;
6413 tree id
= c_parser_peek_token (parser
)->value
;
6414 c_parser_consume_token (parser
);
6415 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6417 expr
.value
= objc_build_protocol_expr (id
);
6421 /* Extension to support C-structures in the archiver. */
6422 gcc_assert (c_dialect_objc ());
6423 c_parser_consume_token (parser
);
6424 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6426 expr
.value
= error_mark_node
;
6429 t1
= c_parser_type_name (parser
);
6432 expr
.value
= error_mark_node
;
6433 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6436 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6439 tree type
= groktypename (t1
, NULL
, NULL
);
6440 expr
.value
= objc_build_encode_expr (type
);
6444 c_parser_error (parser
, "expected expression");
6445 expr
.value
= error_mark_node
;
6449 case CPP_OPEN_SQUARE
:
6450 if (c_dialect_objc ())
6452 tree receiver
, args
;
6453 c_parser_consume_token (parser
);
6454 receiver
= c_parser_objc_receiver (parser
);
6455 args
= c_parser_objc_message_args (parser
);
6456 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6458 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
6462 /* Else fall through to report error. */
6464 c_parser_error (parser
, "expected expression");
6465 expr
.value
= error_mark_node
;
6468 return c_parser_postfix_expression_after_primary (parser
, loc
, expr
);
6471 /* Parse a postfix expression after a parenthesized type name: the
6472 brace-enclosed initializer of a compound literal, possibly followed
6473 by some postfix operators. This is separate because it is not
6474 possible to tell until after the type name whether a cast
6475 expression has a cast or a compound literal, or whether the operand
6476 of sizeof is a parenthesized type name or starts with a compound
6477 literal. TYPE_LOC is the location where TYPE_NAME starts--the
6478 location of the first token after the parentheses around the type
6481 static struct c_expr
6482 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
6483 struct c_type_name
*type_name
,
6484 location_t type_loc
)
6490 location_t start_loc
;
6491 tree type_expr
= NULL_TREE
;
6492 bool type_expr_const
= true;
6493 check_compound_literal_type (type_loc
, type_name
);
6494 start_init (NULL_TREE
, NULL
, 0);
6495 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
6496 start_loc
= c_parser_peek_token (parser
)->location
;
6497 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
6499 error_at (type_loc
, "compound literal has variable size");
6500 type
= error_mark_node
;
6502 init
= c_parser_braced_init (parser
, type
, false);
6504 maybe_warn_string_init (type
, init
);
6506 if (type
!= error_mark_node
6507 && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type
))
6508 && current_function_decl
)
6510 error ("compound literal qualified by address-space qualifier");
6511 type
= error_mark_node
;
6515 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
6516 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
6517 ? CONSTRUCTOR_NON_CONST (init
.value
)
6518 : init
.original_code
== C_MAYBE_CONST_EXPR
);
6519 non_const
|= !type_expr_const
;
6520 expr
.value
= build_compound_literal (start_loc
, type
, init
.value
, non_const
);
6521 expr
.original_code
= ERROR_MARK
;
6522 expr
.original_type
= NULL
;
6525 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
6527 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
6528 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
6532 gcc_assert (!non_const
);
6533 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
6534 type_expr
, expr
.value
);
6537 return c_parser_postfix_expression_after_primary (parser
, start_loc
, expr
);
6540 /* Parse a postfix expression after the initial primary or compound
6541 literal; that is, parse a series of postfix operators.
6543 EXPR_LOC is the location of the primary expression. */
6545 static struct c_expr
6546 c_parser_postfix_expression_after_primary (c_parser
*parser
,
6547 location_t expr_loc
,
6550 struct c_expr orig_expr
;
6552 VEC(tree
,gc
) *exprlist
;
6553 VEC(tree
,gc
) *origtypes
;
6556 location_t op_loc
= c_parser_peek_token (parser
)->location
;
6557 switch (c_parser_peek_token (parser
)->type
)
6559 case CPP_OPEN_SQUARE
:
6560 /* Array reference. */
6561 c_parser_consume_token (parser
);
6562 idx
= c_parser_expression (parser
).value
;
6563 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6565 expr
.value
= build_array_ref (op_loc
, expr
.value
, idx
);
6566 expr
.original_code
= ERROR_MARK
;
6567 expr
.original_type
= NULL
;
6569 case CPP_OPEN_PAREN
:
6570 /* Function call. */
6571 c_parser_consume_token (parser
);
6572 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6575 exprlist
= c_parser_expr_list (parser
, true, false, &origtypes
);
6576 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6579 mark_exp_read (expr
.value
);
6580 /* FIXME diagnostics: Ideally we want the FUNCNAME, not the
6581 "(" after the FUNCNAME, which is what we have now. */
6582 expr
.value
= build_function_call_vec (op_loc
, expr
.value
, exprlist
,
6584 expr
.original_code
= ERROR_MARK
;
6585 if (TREE_CODE (expr
.value
) == INTEGER_CST
6586 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
6587 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
6588 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
6589 expr
.original_code
= C_MAYBE_CONST_EXPR
;
6590 expr
.original_type
= NULL
;
6591 if (exprlist
!= NULL
)
6593 release_tree_vector (exprlist
);
6594 release_tree_vector (origtypes
);
6598 /* Structure element reference. */
6599 c_parser_consume_token (parser
);
6600 expr
= default_function_array_conversion (expr_loc
, expr
);
6601 if (c_parser_next_token_is (parser
, CPP_NAME
))
6602 ident
= c_parser_peek_token (parser
)->value
;
6605 c_parser_error (parser
, "expected identifier");
6606 expr
.value
= error_mark_node
;
6607 expr
.original_code
= ERROR_MARK
;
6608 expr
.original_type
= NULL
;
6611 c_parser_consume_token (parser
);
6612 expr
.value
= build_component_ref (op_loc
, expr
.value
, ident
);
6613 expr
.original_code
= ERROR_MARK
;
6614 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6615 expr
.original_type
= NULL
;
6618 /* Remember the original type of a bitfield. */
6619 tree field
= TREE_OPERAND (expr
.value
, 1);
6620 if (TREE_CODE (field
) != FIELD_DECL
)
6621 expr
.original_type
= NULL
;
6623 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6627 /* Structure element reference. */
6628 c_parser_consume_token (parser
);
6629 expr
= default_function_array_conversion (expr_loc
, expr
);
6630 if (c_parser_next_token_is (parser
, CPP_NAME
))
6631 ident
= c_parser_peek_token (parser
)->value
;
6634 c_parser_error (parser
, "expected identifier");
6635 expr
.value
= error_mark_node
;
6636 expr
.original_code
= ERROR_MARK
;
6637 expr
.original_type
= NULL
;
6640 c_parser_consume_token (parser
);
6641 expr
.value
= build_component_ref (op_loc
,
6642 build_indirect_ref (op_loc
,
6646 expr
.original_code
= ERROR_MARK
;
6647 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6648 expr
.original_type
= NULL
;
6651 /* Remember the original type of a bitfield. */
6652 tree field
= TREE_OPERAND (expr
.value
, 1);
6653 if (TREE_CODE (field
) != FIELD_DECL
)
6654 expr
.original_type
= NULL
;
6656 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6660 /* Postincrement. */
6661 c_parser_consume_token (parser
);
6662 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6663 expr
.value
= build_unary_op (op_loc
,
6664 POSTINCREMENT_EXPR
, expr
.value
, 0);
6665 expr
.original_code
= ERROR_MARK
;
6666 expr
.original_type
= NULL
;
6668 case CPP_MINUS_MINUS
:
6669 /* Postdecrement. */
6670 c_parser_consume_token (parser
);
6671 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6672 expr
.value
= build_unary_op (op_loc
,
6673 POSTDECREMENT_EXPR
, expr
.value
, 0);
6674 expr
.original_code
= ERROR_MARK
;
6675 expr
.original_type
= NULL
;
6683 /* Parse an expression (C90 6.3.17, C99 6.5.17).
6686 assignment-expression
6687 expression , assignment-expression
6690 static struct c_expr
6691 c_parser_expression (c_parser
*parser
)
6694 expr
= c_parser_expr_no_commas (parser
, NULL
);
6695 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6699 location_t loc
= c_parser_peek_token (parser
)->location
;
6700 location_t expr_loc
;
6701 c_parser_consume_token (parser
);
6702 expr_loc
= c_parser_peek_token (parser
)->location
;
6703 lhsval
= expr
.value
;
6704 while (TREE_CODE (lhsval
) == COMPOUND_EXPR
)
6705 lhsval
= TREE_OPERAND (lhsval
, 1);
6706 if (DECL_P (lhsval
) || handled_component_p (lhsval
))
6707 mark_exp_read (lhsval
);
6708 next
= c_parser_expr_no_commas (parser
, NULL
);
6709 next
= default_function_array_conversion (expr_loc
, next
);
6710 expr
.value
= build_compound_expr (loc
, expr
.value
, next
.value
);
6711 expr
.original_code
= COMPOUND_EXPR
;
6712 expr
.original_type
= next
.original_type
;
6717 /* Parse an expression and convert functions or arrays to
6720 static struct c_expr
6721 c_parser_expression_conv (c_parser
*parser
)
6724 location_t loc
= c_parser_peek_token (parser
)->location
;
6725 expr
= c_parser_expression (parser
);
6726 expr
= default_function_array_conversion (loc
, expr
);
6730 /* Parse a non-empty list of expressions. If CONVERT_P, convert
6731 functions and arrays to pointers. If FOLD_P, fold the expressions.
6734 assignment-expression
6735 nonempty-expr-list , assignment-expression
6738 static VEC(tree
,gc
) *
6739 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
,
6740 VEC(tree
,gc
) **p_orig_types
)
6743 VEC(tree
,gc
) *orig_types
;
6745 location_t loc
= c_parser_peek_token (parser
)->location
;
6747 ret
= make_tree_vector ();
6748 if (p_orig_types
== NULL
)
6751 orig_types
= make_tree_vector ();
6753 expr
= c_parser_expr_no_commas (parser
, NULL
);
6755 expr
= default_function_array_read_conversion (loc
, expr
);
6757 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6758 VEC_quick_push (tree
, ret
, expr
.value
);
6759 if (orig_types
!= NULL
)
6760 VEC_quick_push (tree
, orig_types
, expr
.original_type
);
6761 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6763 c_parser_consume_token (parser
);
6764 loc
= c_parser_peek_token (parser
)->location
;
6765 expr
= c_parser_expr_no_commas (parser
, NULL
);
6767 expr
= default_function_array_read_conversion (loc
, expr
);
6769 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6770 VEC_safe_push (tree
, gc
, ret
, expr
.value
);
6771 if (orig_types
!= NULL
)
6772 VEC_safe_push (tree
, gc
, orig_types
, expr
.original_type
);
6774 if (orig_types
!= NULL
)
6775 *p_orig_types
= orig_types
;
6779 /* Parse Objective-C-specific constructs. */
6781 /* Parse an objc-class-definition.
6783 objc-class-definition:
6784 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
6785 objc-class-instance-variables[opt] objc-methodprotolist @end
6786 @implementation identifier objc-superclass[opt]
6787 objc-class-instance-variables[opt]
6788 @interface identifier ( identifier ) objc-protocol-refs[opt]
6789 objc-methodprotolist @end
6790 @interface identifier ( ) objc-protocol-refs[opt]
6791 objc-methodprotolist @end
6792 @implementation identifier ( identifier )
6797 "@interface identifier (" must start "@interface identifier (
6798 identifier ) ...": objc-methodprotolist in the first production may
6799 not start with a parenthesized identifier as a declarator of a data
6800 definition with no declaration specifiers if the objc-superclass,
6801 objc-protocol-refs and objc-class-instance-variables are omitted. */
6804 c_parser_objc_class_definition (c_parser
*parser
, tree attributes
)
6809 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
6811 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
6816 c_parser_consume_token (parser
);
6817 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6819 c_parser_error (parser
, "expected identifier");
6822 id1
= c_parser_peek_token (parser
)->value
;
6823 c_parser_consume_token (parser
);
6824 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6826 /* We have a category or class extension. */
6828 tree proto
= NULL_TREE
;
6829 c_parser_consume_token (parser
);
6830 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6832 if (iface_p
&& c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6834 /* We have a class extension. */
6839 c_parser_error (parser
, "expected identifier or %<)%>");
6840 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6846 id2
= c_parser_peek_token (parser
)->value
;
6847 c_parser_consume_token (parser
);
6849 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6852 objc_start_category_implementation (id1
, id2
);
6855 if (c_parser_next_token_is (parser
, CPP_LESS
))
6856 proto
= c_parser_objc_protocol_refs (parser
);
6857 objc_start_category_interface (id1
, id2
, proto
, attributes
);
6858 c_parser_objc_methodprotolist (parser
);
6859 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6860 objc_finish_interface ();
6863 if (c_parser_next_token_is (parser
, CPP_COLON
))
6865 c_parser_consume_token (parser
);
6866 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6868 c_parser_error (parser
, "expected identifier");
6871 superclass
= c_parser_peek_token (parser
)->value
;
6872 c_parser_consume_token (parser
);
6875 superclass
= NULL_TREE
;
6878 tree proto
= NULL_TREE
;
6879 if (c_parser_next_token_is (parser
, CPP_LESS
))
6880 proto
= c_parser_objc_protocol_refs (parser
);
6881 objc_start_class_interface (id1
, superclass
, proto
, attributes
);
6884 objc_start_class_implementation (id1
, superclass
);
6885 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6886 c_parser_objc_class_instance_variables (parser
);
6889 objc_continue_interface ();
6890 c_parser_objc_methodprotolist (parser
);
6891 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6892 objc_finish_interface ();
6896 objc_continue_implementation ();
6901 /* Parse objc-class-instance-variables.
6903 objc-class-instance-variables:
6904 { objc-instance-variable-decl-list[opt] }
6906 objc-instance-variable-decl-list:
6907 objc-visibility-spec
6908 objc-instance-variable-decl ;
6910 objc-instance-variable-decl-list objc-visibility-spec
6911 objc-instance-variable-decl-list objc-instance-variable-decl ;
6912 objc-instance-variable-decl-list ;
6914 objc-visibility-spec:
6919 objc-instance-variable-decl:
6924 c_parser_objc_class_instance_variables (c_parser
*parser
)
6926 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
6927 c_parser_consume_token (parser
);
6928 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
6931 /* Parse any stray semicolon. */
6932 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6934 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6935 "extra semicolon in struct or union specified");
6936 c_parser_consume_token (parser
);
6939 /* Stop if at the end of the instance variables. */
6940 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
6942 c_parser_consume_token (parser
);
6945 /* Parse any objc-visibility-spec. */
6946 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
6948 c_parser_consume_token (parser
);
6949 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE
);
6952 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
6954 c_parser_consume_token (parser
);
6955 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED
);
6958 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
6960 c_parser_consume_token (parser
);
6961 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC
);
6964 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PACKAGE
))
6966 c_parser_consume_token (parser
);
6967 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE
);
6970 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
6972 c_parser_pragma (parser
, pragma_external
);
6976 /* Parse some comma-separated declarations. */
6977 decls
= c_parser_struct_declaration (parser
);
6979 /* Comma-separated instance variables are chained together in
6980 reverse order; add them one by one. */
6981 tree ivar
= nreverse (decls
);
6982 for (; ivar
; ivar
= DECL_CHAIN (ivar
))
6983 objc_add_instance_variable (copy_node (ivar
));
6985 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6989 /* Parse an objc-class-declaration.
6991 objc-class-declaration:
6992 @class identifier-list ;
6996 c_parser_objc_class_declaration (c_parser
*parser
)
6998 tree list
= NULL_TREE
;
6999 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
7000 c_parser_consume_token (parser
);
7001 /* Any identifiers, including those declared as type names, are OK
7006 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7008 c_parser_error (parser
, "expected identifier");
7009 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7010 parser
->error
= false;
7013 id
= c_parser_peek_token (parser
)->value
;
7014 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7015 c_parser_consume_token (parser
);
7016 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7017 c_parser_consume_token (parser
);
7021 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7022 objc_declare_class (list
);
7025 /* Parse an objc-alias-declaration.
7027 objc-alias-declaration:
7028 @compatibility_alias identifier identifier ;
7032 c_parser_objc_alias_declaration (c_parser
*parser
)
7035 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
7036 c_parser_consume_token (parser
);
7037 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7039 c_parser_error (parser
, "expected identifier");
7040 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7043 id1
= c_parser_peek_token (parser
)->value
;
7044 c_parser_consume_token (parser
);
7045 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7047 c_parser_error (parser
, "expected identifier");
7048 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7051 id2
= c_parser_peek_token (parser
)->value
;
7052 c_parser_consume_token (parser
);
7053 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7054 objc_declare_alias (id1
, id2
);
7057 /* Parse an objc-protocol-definition.
7059 objc-protocol-definition:
7060 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
7061 @protocol identifier-list ;
7063 "@protocol identifier ;" should be resolved as "@protocol
7064 identifier-list ;": objc-methodprotolist may not start with a
7065 semicolon in the first alternative if objc-protocol-refs are
7069 c_parser_objc_protocol_definition (c_parser
*parser
, tree attributes
)
7071 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
7073 c_parser_consume_token (parser
);
7074 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7076 c_parser_error (parser
, "expected identifier");
7079 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
7080 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
7082 tree list
= NULL_TREE
;
7083 /* Any identifiers, including those declared as type names, are
7088 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7090 c_parser_error (parser
, "expected identifier");
7093 id
= c_parser_peek_token (parser
)->value
;
7094 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7095 c_parser_consume_token (parser
);
7096 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7097 c_parser_consume_token (parser
);
7101 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7102 objc_declare_protocols (list
, attributes
);
7106 tree id
= c_parser_peek_token (parser
)->value
;
7107 tree proto
= NULL_TREE
;
7108 c_parser_consume_token (parser
);
7109 if (c_parser_next_token_is (parser
, CPP_LESS
))
7110 proto
= c_parser_objc_protocol_refs (parser
);
7111 parser
->objc_pq_context
= true;
7112 objc_start_protocol (id
, proto
, attributes
);
7113 c_parser_objc_methodprotolist (parser
);
7114 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7115 parser
->objc_pq_context
= false;
7116 objc_finish_interface ();
7120 /* Parse an objc-method-type.
7126 Return true if it is a class method (+) and false if it is
7127 an instance method (-).
7130 c_parser_objc_method_type (c_parser
*parser
)
7132 switch (c_parser_peek_token (parser
)->type
)
7135 c_parser_consume_token (parser
);
7138 c_parser_consume_token (parser
);
7145 /* Parse an objc-method-definition.
7147 objc-method-definition:
7148 objc-method-type objc-method-decl ;[opt] compound-statement
7152 c_parser_objc_method_definition (c_parser
*parser
)
7154 bool is_class_method
= c_parser_objc_method_type (parser
);
7155 tree decl
, attributes
= NULL_TREE
;
7156 parser
->objc_pq_context
= true;
7157 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
);
7158 if (decl
== error_mark_node
)
7159 return; /* Bail here. */
7161 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7163 c_parser_consume_token (parser
);
7164 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7165 "extra semicolon in method definition specified");
7168 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7170 c_parser_error (parser
, "expected %<{%>");
7174 parser
->objc_pq_context
= false;
7175 if (objc_start_method_definition (is_class_method
, decl
, attributes
))
7177 add_stmt (c_parser_compound_statement (parser
));
7178 objc_finish_method_definition (current_function_decl
);
7182 /* This code is executed when we find a method definition
7183 outside of an @implementation context (or invalid for other
7184 reasons). Parse the method (to keep going) but do not emit
7187 c_parser_compound_statement (parser
);
7191 /* Parse an objc-methodprotolist.
7193 objc-methodprotolist:
7195 objc-methodprotolist objc-methodproto
7196 objc-methodprotolist declaration
7197 objc-methodprotolist ;
7201 The declaration is a data definition, which may be missing
7202 declaration specifiers under the same rules and diagnostics as
7203 other data definitions outside functions, and the stray semicolon
7204 is diagnosed the same way as a stray semicolon outside a
7208 c_parser_objc_methodprotolist (c_parser
*parser
)
7212 /* The list is terminated by @end. */
7213 switch (c_parser_peek_token (parser
)->type
)
7216 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7217 "ISO C does not allow extra %<;%> outside of a function");
7218 c_parser_consume_token (parser
);
7222 c_parser_objc_methodproto (parser
);
7225 c_parser_pragma (parser
, pragma_external
);
7230 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
7232 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
))
7233 c_parser_objc_at_property_declaration (parser
);
7234 else if (c_parser_next_token_is_keyword (parser
, RID_AT_OPTIONAL
))
7236 objc_set_method_opt (true);
7237 c_parser_consume_token (parser
);
7239 else if (c_parser_next_token_is_keyword (parser
, RID_AT_REQUIRED
))
7241 objc_set_method_opt (false);
7242 c_parser_consume_token (parser
);
7245 c_parser_declaration_or_fndef (parser
, false, false, true,
7252 /* Parse an objc-methodproto.
7255 objc-method-type objc-method-decl ;
7259 c_parser_objc_methodproto (c_parser
*parser
)
7261 bool is_class_method
= c_parser_objc_method_type (parser
);
7262 tree decl
, attributes
= NULL_TREE
;
7264 /* Remember protocol qualifiers in prototypes. */
7265 parser
->objc_pq_context
= true;
7266 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
);
7267 /* Forget protocol qualifiers now. */
7268 parser
->objc_pq_context
= false;
7270 /* Do not allow the presence of attributes to hide an erroneous
7271 method implementation in the interface section. */
7272 if (!c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7274 c_parser_error (parser
, "expected %<;%>");
7278 if (decl
!= error_mark_node
)
7279 objc_add_method_declaration (is_class_method
, decl
, attributes
);
7281 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7284 /* If we are at a position that method attributes may be present, check that
7285 there are not any parsed already (a syntax error) and then collect any
7286 specified at the current location. Finally, if new attributes were present,
7287 check that the next token is legal ( ';' for decls and '{' for defs). */
7290 c_parser_objc_maybe_method_attributes (c_parser
* parser
, tree
* attributes
)
7295 c_parser_error (parser
,
7296 "method attributes must be specified at the end only");
7297 *attributes
= NULL_TREE
;
7301 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7302 *attributes
= c_parser_attributes (parser
);
7304 /* If there were no attributes here, just report any earlier error. */
7305 if (*attributes
== NULL_TREE
|| bad
)
7308 /* If the attributes are followed by a ; or {, then just report any earlier
7310 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
7311 || c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7314 /* We've got attributes, but not at the end. */
7315 c_parser_error (parser
,
7316 "expected %<;%> or %<{%> after method attribute definition");
7320 /* Parse an objc-method-decl.
7323 ( objc-type-name ) objc-selector
7325 ( objc-type-name ) objc-keyword-selector objc-optparmlist
7326 objc-keyword-selector objc-optparmlist
7329 objc-keyword-selector:
7331 objc-keyword-selector objc-keyword-decl
7334 objc-selector : ( objc-type-name ) identifier
7335 objc-selector : identifier
7336 : ( objc-type-name ) identifier
7340 objc-optparms objc-optellipsis
7344 objc-opt-parms , parameter-declaration
7352 c_parser_objc_method_decl (c_parser
*parser
, bool is_class_method
, tree
*attributes
)
7354 tree type
= NULL_TREE
;
7356 tree parms
= NULL_TREE
;
7357 bool ellipsis
= false;
7358 bool attr_err
= false;
7360 *attributes
= NULL_TREE
;
7361 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7363 c_parser_consume_token (parser
);
7364 type
= c_parser_objc_type_name (parser
);
7365 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7367 sel
= c_parser_objc_selector (parser
);
7368 /* If there is no selector, or a colon follows, we have an
7369 objc-keyword-selector. If there is a selector, and a colon does
7370 not follow, that selector ends the objc-method-decl. */
7371 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
7374 tree list
= NULL_TREE
;
7377 tree atype
= NULL_TREE
, id
, keyworddecl
;
7378 tree param_attr
= NULL_TREE
;
7379 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7381 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7383 c_parser_consume_token (parser
);
7384 atype
= c_parser_objc_type_name (parser
);
7385 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7388 /* New ObjC allows attributes on method parameters. */
7389 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7390 param_attr
= c_parser_attributes (parser
);
7391 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7393 c_parser_error (parser
, "expected identifier");
7394 return error_mark_node
;
7396 id
= c_parser_peek_token (parser
)->value
;
7397 c_parser_consume_token (parser
);
7398 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
, param_attr
);
7399 list
= chainon (list
, keyworddecl
);
7400 tsel
= c_parser_objc_selector (parser
);
7401 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7405 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7407 /* Parse the optional parameter list. Optional Objective-C
7408 method parameters follow the C syntax, and may include '...'
7409 to denote a variable number of arguments. */
7410 parms
= make_node (TREE_LIST
);
7411 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7413 struct c_parm
*parm
;
7414 c_parser_consume_token (parser
);
7415 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7418 c_parser_consume_token (parser
);
7419 attr_err
|= c_parser_objc_maybe_method_attributes
7420 (parser
, attributes
) ;
7423 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7426 parms
= chainon (parms
,
7427 build_tree_list (NULL_TREE
, grokparm (parm
)));
7432 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7436 c_parser_error (parser
, "objective-c method declaration is expected");
7437 return error_mark_node
;
7441 return error_mark_node
;
7443 return objc_build_method_signature (is_class_method
, type
, sel
, parms
, ellipsis
);
7446 /* Parse an objc-type-name.
7449 objc-type-qualifiers[opt] type-name
7450 objc-type-qualifiers[opt]
7452 objc-type-qualifiers:
7454 objc-type-qualifiers objc-type-qualifier
7456 objc-type-qualifier: one of
7457 in out inout bycopy byref oneway
7461 c_parser_objc_type_name (c_parser
*parser
)
7463 tree quals
= NULL_TREE
;
7464 struct c_type_name
*type_name
= NULL
;
7465 tree type
= NULL_TREE
;
7468 c_token
*token
= c_parser_peek_token (parser
);
7469 if (token
->type
== CPP_KEYWORD
7470 && (token
->keyword
== RID_IN
7471 || token
->keyword
== RID_OUT
7472 || token
->keyword
== RID_INOUT
7473 || token
->keyword
== RID_BYCOPY
7474 || token
->keyword
== RID_BYREF
7475 || token
->keyword
== RID_ONEWAY
))
7477 quals
= chainon (build_tree_list (NULL_TREE
, token
->value
), quals
);
7478 c_parser_consume_token (parser
);
7483 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
7484 type_name
= c_parser_type_name (parser
);
7486 type
= groktypename (type_name
, NULL
, NULL
);
7488 /* If the type is unknown, and error has already been produced and
7489 we need to recover from the error. In that case, use NULL_TREE
7490 for the type, as if no type had been specified; this will use the
7491 default type ('id') which is good for error recovery. */
7492 if (type
== error_mark_node
)
7495 return build_tree_list (quals
, type
);
7498 /* Parse objc-protocol-refs.
7505 c_parser_objc_protocol_refs (c_parser
*parser
)
7507 tree list
= NULL_TREE
;
7508 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
7509 c_parser_consume_token (parser
);
7510 /* Any identifiers, including those declared as type names, are OK
7515 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7517 c_parser_error (parser
, "expected identifier");
7520 id
= c_parser_peek_token (parser
)->value
;
7521 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7522 c_parser_consume_token (parser
);
7523 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7524 c_parser_consume_token (parser
);
7528 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
7532 /* Parse an objc-try-catch-finally-statement.
7534 objc-try-catch-finally-statement:
7535 @try compound-statement objc-catch-list[opt]
7536 @try compound-statement objc-catch-list[opt] @finally compound-statement
7539 @catch ( objc-catch-parameter-declaration ) compound-statement
7540 objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
7542 objc-catch-parameter-declaration:
7543 parameter-declaration
7546 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
7548 PS: This function is identical to cp_parser_objc_try_catch_finally_statement
7549 for C++. Keep them in sync. */
7552 c_parser_objc_try_catch_finally_statement (c_parser
*parser
)
7554 location_t location
;
7557 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
7558 c_parser_consume_token (parser
);
7559 location
= c_parser_peek_token (parser
)->location
;
7560 objc_maybe_warn_exceptions (location
);
7561 stmt
= c_parser_compound_statement (parser
);
7562 objc_begin_try_stmt (location
, stmt
);
7564 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
7566 struct c_parm
*parm
;
7567 tree parameter_declaration
= error_mark_node
;
7568 bool seen_open_paren
= false;
7570 c_parser_consume_token (parser
);
7571 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7572 seen_open_paren
= true;
7573 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7575 /* We have "@catch (...)" (where the '...' are literally
7576 what is in the code). Skip the '...'.
7577 parameter_declaration is set to NULL_TREE, and
7578 objc_being_catch_clauses() knows that that means
7580 c_parser_consume_token (parser
);
7581 parameter_declaration
= NULL_TREE
;
7585 /* We have "@catch (NSException *exception)" or something
7586 like that. Parse the parameter declaration. */
7587 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7589 parameter_declaration
= error_mark_node
;
7591 parameter_declaration
= grokparm (parm
);
7593 if (seen_open_paren
)
7594 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7597 /* If there was no open parenthesis, we are recovering from
7598 an error, and we are trying to figure out what mistake
7599 the user has made. */
7601 /* If there is an immediate closing parenthesis, the user
7602 probably forgot the opening one (ie, they typed "@catch
7603 NSException *e)". Parse the closing parenthesis and keep
7605 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
7606 c_parser_consume_token (parser
);
7608 /* If these is no immediate closing parenthesis, the user
7609 probably doesn't know that parenthesis are required at
7610 all (ie, they typed "@catch NSException *e"). So, just
7611 forget about the closing parenthesis and keep going. */
7613 objc_begin_catch_clause (parameter_declaration
);
7614 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7615 c_parser_compound_statement_nostart (parser
);
7616 objc_finish_catch_clause ();
7618 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
7620 c_parser_consume_token (parser
);
7621 location
= c_parser_peek_token (parser
)->location
;
7622 stmt
= c_parser_compound_statement (parser
);
7623 objc_build_finally_clause (location
, stmt
);
7625 objc_finish_try_stmt ();
7628 /* Parse an objc-synchronized-statement.
7630 objc-synchronized-statement:
7631 @synchronized ( expression ) compound-statement
7635 c_parser_objc_synchronized_statement (c_parser
*parser
)
7639 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
7640 c_parser_consume_token (parser
);
7641 loc
= c_parser_peek_token (parser
)->location
;
7642 objc_maybe_warn_exceptions (loc
);
7643 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7645 expr
= c_parser_expression (parser
).value
;
7646 expr
= c_fully_fold (expr
, false, NULL
);
7647 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7650 expr
= error_mark_node
;
7651 stmt
= c_parser_compound_statement (parser
);
7652 objc_build_synchronized (loc
, expr
, stmt
);
7655 /* Parse an objc-selector; return NULL_TREE without an error if the
7656 next token is not an objc-selector.
7661 enum struct union if else while do for switch case default
7662 break continue return goto asm sizeof typeof __alignof
7663 unsigned long const short volatile signed restrict _Complex
7664 in out inout bycopy byref oneway int char float double void _Bool
7666 ??? Why this selection of keywords but not, for example, storage
7667 class specifiers? */
7670 c_parser_objc_selector (c_parser
*parser
)
7672 c_token
*token
= c_parser_peek_token (parser
);
7673 tree value
= token
->value
;
7674 if (token
->type
== CPP_NAME
)
7676 c_parser_consume_token (parser
);
7679 if (token
->type
!= CPP_KEYWORD
)
7681 switch (token
->keyword
)
7723 c_parser_consume_token (parser
);
7730 /* Parse an objc-selector-arg.
7734 objc-keywordname-list
7736 objc-keywordname-list:
7738 objc-keywordname-list objc-keywordname
7746 c_parser_objc_selector_arg (c_parser
*parser
)
7748 tree sel
= c_parser_objc_selector (parser
);
7749 tree list
= NULL_TREE
;
7750 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7754 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7756 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
7757 sel
= c_parser_objc_selector (parser
);
7758 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7764 /* Parse an objc-receiver.
7773 c_parser_objc_receiver (c_parser
*parser
)
7775 if (c_parser_peek_token (parser
)->type
== CPP_NAME
7776 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
7777 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
7779 tree id
= c_parser_peek_token (parser
)->value
;
7780 c_parser_consume_token (parser
);
7781 return objc_get_class_reference (id
);
7783 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
7786 /* Parse objc-message-args.
7790 objc-keywordarg-list
7792 objc-keywordarg-list:
7794 objc-keywordarg-list objc-keywordarg
7797 objc-selector : objc-keywordexpr
7802 c_parser_objc_message_args (c_parser
*parser
)
7804 tree sel
= c_parser_objc_selector (parser
);
7805 tree list
= NULL_TREE
;
7806 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7811 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7812 return error_mark_node
;
7813 keywordexpr
= c_parser_objc_keywordexpr (parser
);
7814 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
7815 sel
= c_parser_objc_selector (parser
);
7816 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7822 /* Parse an objc-keywordexpr.
7829 c_parser_objc_keywordexpr (c_parser
*parser
)
7832 VEC(tree
,gc
) *expr_list
= c_parser_expr_list (parser
, true, true, NULL
);
7833 if (VEC_length (tree
, expr_list
) == 1)
7835 /* Just return the expression, remove a level of
7837 ret
= VEC_index (tree
, expr_list
, 0);
7841 /* We have a comma expression, we will collapse later. */
7842 ret
= build_tree_list_vec (expr_list
);
7844 release_tree_vector (expr_list
);
7848 /* A check, needed in several places, that ObjC interface, implementation or
7849 method definitions are not prefixed by incorrect items. */
7851 c_parser_objc_diagnose_bad_element_prefix (c_parser
*parser
,
7852 struct c_declspecs
*specs
)
7854 if (!specs
->declspecs_seen_p
|| specs
->non_sc_seen_p
7855 || specs
->typespec_kind
!= ctsk_none
)
7857 c_parser_error (parser
,
7858 "no type or storage class may be specified here,");
7859 c_parser_skip_to_end_of_block_or_statement (parser
);
7865 /* Parse an Objective-C @property declaration. The syntax is:
7867 objc-property-declaration:
7868 '@property' objc-property-attributes[opt] struct-declaration ;
7870 objc-property-attributes:
7871 '(' objc-property-attribute-list ')'
7873 objc-property-attribute-list:
7874 objc-property-attribute
7875 objc-property-attribute-list, objc-property-attribute
7877 objc-property-attribute
7878 'getter' = identifier
7879 'setter' = identifier
7888 @property NSString *name;
7889 @property (readonly) id object;
7890 @property (retain, nonatomic, getter=getTheName) id name;
7891 @property int a, b, c;
7893 PS: This function is identical to cp_parser_objc_at_propery_declaration
7894 for C++. Keep them in sync. */
7896 c_parser_objc_at_property_declaration (c_parser
*parser
)
7898 /* The following variables hold the attributes of the properties as
7899 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
7900 seen. When we see an attribute, we set them to 'true' (if they
7901 are boolean properties) or to the identifier (if they have an
7902 argument, ie, for getter and setter). Note that here we only
7903 parse the list of attributes, check the syntax and accumulate the
7904 attributes that we find. objc_add_property_declaration() will
7905 then process the information. */
7906 bool property_assign
= false;
7907 bool property_copy
= false;
7908 tree property_getter_ident
= NULL_TREE
;
7909 bool property_nonatomic
= false;
7910 bool property_readonly
= false;
7911 bool property_readwrite
= false;
7912 bool property_retain
= false;
7913 tree property_setter_ident
= NULL_TREE
;
7915 /* 'properties' is the list of properties that we read. Usually a
7916 single one, but maybe more (eg, in "@property int a, b, c;" there
7921 loc
= c_parser_peek_token (parser
)->location
;
7922 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
));
7924 c_parser_consume_token (parser
); /* Eat '@property'. */
7926 /* Parse the optional attribute list... */
7927 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7930 c_parser_consume_token (parser
);
7932 /* Property attribute keywords are valid now. */
7933 parser
->objc_property_attr_context
= true;
7937 bool syntax_error
= false;
7938 c_token
*token
= c_parser_peek_token (parser
);
7941 if (token
->type
!= CPP_KEYWORD
)
7943 if (token
->type
== CPP_CLOSE_PAREN
)
7944 c_parser_error (parser
, "expected identifier");
7947 c_parser_consume_token (parser
);
7948 c_parser_error (parser
, "unknown property attribute");
7952 keyword
= token
->keyword
;
7953 c_parser_consume_token (parser
);
7956 case RID_ASSIGN
: property_assign
= true; break;
7957 case RID_COPY
: property_copy
= true; break;
7958 case RID_NONATOMIC
: property_nonatomic
= true; break;
7959 case RID_READONLY
: property_readonly
= true; break;
7960 case RID_READWRITE
: property_readwrite
= true; break;
7961 case RID_RETAIN
: property_retain
= true; break;
7965 if (c_parser_next_token_is_not (parser
, CPP_EQ
))
7967 if (keyword
== RID_GETTER
)
7968 c_parser_error (parser
,
7969 "missing %<=%> (after %<getter%> attribute)");
7971 c_parser_error (parser
,
7972 "missing %<=%> (after %<setter%> attribute)");
7973 syntax_error
= true;
7976 c_parser_consume_token (parser
); /* eat the = */
7977 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7979 c_parser_error (parser
, "expected identifier");
7980 syntax_error
= true;
7983 if (keyword
== RID_SETTER
)
7985 if (property_setter_ident
!= NULL_TREE
)
7986 c_parser_error (parser
, "the %<setter%> attribute may only be specified once");
7988 property_setter_ident
= c_parser_peek_token (parser
)->value
;
7989 c_parser_consume_token (parser
);
7990 if (c_parser_next_token_is_not (parser
, CPP_COLON
))
7991 c_parser_error (parser
, "setter name must terminate with %<:%>");
7993 c_parser_consume_token (parser
);
7997 if (property_getter_ident
!= NULL_TREE
)
7998 c_parser_error (parser
, "the %<getter%> attribute may only be specified once");
8000 property_getter_ident
= c_parser_peek_token (parser
)->value
;
8001 c_parser_consume_token (parser
);
8005 c_parser_error (parser
, "unknown property attribute");
8006 syntax_error
= true;
8013 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8014 c_parser_consume_token (parser
);
8018 parser
->objc_property_attr_context
= false;
8019 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8021 /* ... and the property declaration(s). */
8022 properties
= c_parser_struct_declaration (parser
);
8024 if (properties
== error_mark_node
)
8026 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8027 parser
->error
= false;
8031 if (properties
== NULL_TREE
)
8032 c_parser_error (parser
, "expected identifier");
8035 /* Comma-separated properties are chained together in
8036 reverse order; add them one by one. */
8037 properties
= nreverse (properties
);
8039 for (; properties
; properties
= TREE_CHAIN (properties
))
8040 objc_add_property_declaration (loc
, copy_node (properties
),
8041 property_readonly
, property_readwrite
,
8042 property_assign
, property_retain
,
8043 property_copy
, property_nonatomic
,
8044 property_getter_ident
, property_setter_ident
);
8047 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8048 parser
->error
= false;
8051 /* Parse an Objective-C @synthesize declaration. The syntax is:
8053 objc-synthesize-declaration:
8054 @synthesize objc-synthesize-identifier-list ;
8056 objc-synthesize-identifier-list:
8057 objc-synthesize-identifier
8058 objc-synthesize-identifier-list, objc-synthesize-identifier
8060 objc-synthesize-identifier
8062 identifier = identifier
8065 @synthesize MyProperty;
8066 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
8068 PS: This function is identical to cp_parser_objc_at_synthesize_declaration
8069 for C++. Keep them in sync.
8072 c_parser_objc_at_synthesize_declaration (c_parser
*parser
)
8074 tree list
= NULL_TREE
;
8076 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNTHESIZE
));
8077 loc
= c_parser_peek_token (parser
)->location
;
8079 c_parser_consume_token (parser
);
8082 tree property
, ivar
;
8083 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8085 c_parser_error (parser
, "expected identifier");
8086 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8087 /* Once we find the semicolon, we can resume normal parsing.
8088 We have to reset parser->error manually because
8089 c_parser_skip_until_found() won't reset it for us if the
8090 next token is precisely a semicolon. */
8091 parser
->error
= false;
8094 property
= c_parser_peek_token (parser
)->value
;
8095 c_parser_consume_token (parser
);
8096 if (c_parser_next_token_is (parser
, CPP_EQ
))
8098 c_parser_consume_token (parser
);
8099 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8101 c_parser_error (parser
, "expected identifier");
8102 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8103 parser
->error
= false;
8106 ivar
= c_parser_peek_token (parser
)->value
;
8107 c_parser_consume_token (parser
);
8111 list
= chainon (list
, build_tree_list (ivar
, property
));
8112 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8113 c_parser_consume_token (parser
);
8117 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8118 objc_add_synthesize_declaration (loc
, list
);
8121 /* Parse an Objective-C @dynamic declaration. The syntax is:
8123 objc-dynamic-declaration:
8124 @dynamic identifier-list ;
8127 @dynamic MyProperty;
8128 @dynamic MyProperty, AnotherProperty;
8130 PS: This function is identical to cp_parser_objc_at_dynamic_declaration
8131 for C++. Keep them in sync.
8134 c_parser_objc_at_dynamic_declaration (c_parser
*parser
)
8136 tree list
= NULL_TREE
;
8138 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_DYNAMIC
));
8139 loc
= c_parser_peek_token (parser
)->location
;
8141 c_parser_consume_token (parser
);
8145 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8147 c_parser_error (parser
, "expected identifier");
8148 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8149 parser
->error
= false;
8152 property
= c_parser_peek_token (parser
)->value
;
8153 list
= chainon (list
, build_tree_list (NULL_TREE
, property
));
8154 c_parser_consume_token (parser
);
8155 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8156 c_parser_consume_token (parser
);
8160 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8161 objc_add_dynamic_declaration (loc
, list
);
8165 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
8166 should be considered, statements. ALLOW_STMT is true if we're within
8167 the context of a function and such pragmas are to be allowed. Returns
8168 true if we actually parsed such a pragma. */
8171 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
8175 id
= c_parser_peek_token (parser
)->pragma_kind
;
8176 gcc_assert (id
!= PRAGMA_NONE
);
8180 case PRAGMA_OMP_BARRIER
:
8181 if (context
!= pragma_compound
)
8183 if (context
== pragma_stmt
)
8184 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
8185 "used in compound statements");
8188 c_parser_omp_barrier (parser
);
8191 case PRAGMA_OMP_FLUSH
:
8192 if (context
!= pragma_compound
)
8194 if (context
== pragma_stmt
)
8195 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
8196 "used in compound statements");
8199 c_parser_omp_flush (parser
);
8202 case PRAGMA_OMP_TASKWAIT
:
8203 if (context
!= pragma_compound
)
8205 if (context
== pragma_stmt
)
8206 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
8207 "used in compound statements");
8210 c_parser_omp_taskwait (parser
);
8213 case PRAGMA_OMP_THREADPRIVATE
:
8214 c_parser_omp_threadprivate (parser
);
8217 case PRAGMA_OMP_SECTION
:
8218 error_at (c_parser_peek_token (parser
)->location
,
8219 "%<#pragma omp section%> may only be used in "
8220 "%<#pragma omp sections%> construct");
8221 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8224 case PRAGMA_GCC_PCH_PREPROCESS
:
8225 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
8226 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8230 if (id
< PRAGMA_FIRST_EXTERNAL
)
8232 if (context
== pragma_external
)
8235 c_parser_error (parser
, "expected declaration specifiers");
8236 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8239 c_parser_omp_construct (parser
);
8245 c_parser_consume_pragma (parser
);
8246 c_invoke_pragma_handler (id
);
8248 /* Skip to EOL, but suppress any error message. Those will have been
8249 generated by the handler routine through calling error, as opposed
8250 to calling c_parser_error. */
8251 parser
->error
= true;
8252 c_parser_skip_to_pragma_eol (parser
);
8257 /* The interface the pragma parsers have to the lexer. */
8260 pragma_lex (tree
*value
)
8262 c_token
*tok
= c_parser_peek_token (the_parser
);
8263 enum cpp_ttype ret
= tok
->type
;
8265 *value
= tok
->value
;
8266 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
8270 if (ret
== CPP_KEYWORD
)
8272 c_parser_consume_token (the_parser
);
8279 c_parser_pragma_pch_preprocess (c_parser
*parser
)
8283 c_parser_consume_pragma (parser
);
8284 if (c_parser_next_token_is (parser
, CPP_STRING
))
8286 name
= c_parser_peek_token (parser
)->value
;
8287 c_parser_consume_token (parser
);
8290 c_parser_error (parser
, "expected string literal");
8291 c_parser_skip_to_pragma_eol (parser
);
8294 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
8297 /* OpenMP 2.5 parsing routines. */
8299 /* Returns name of the next clause.
8300 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
8301 the token is not consumed. Otherwise appropriate pragma_omp_clause is
8302 returned and the token is consumed. */
8304 static pragma_omp_clause
8305 c_parser_omp_clause_name (c_parser
*parser
)
8307 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
8309 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
8310 result
= PRAGMA_OMP_CLAUSE_IF
;
8311 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
8312 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
8313 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8315 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8320 if (!strcmp ("collapse", p
))
8321 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
8322 else if (!strcmp ("copyin", p
))
8323 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
8324 else if (!strcmp ("copyprivate", p
))
8325 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
8328 if (!strcmp ("firstprivate", p
))
8329 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
8332 if (!strcmp ("lastprivate", p
))
8333 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
8336 if (!strcmp ("nowait", p
))
8337 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
8338 else if (!strcmp ("num_threads", p
))
8339 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
8342 if (!strcmp ("ordered", p
))
8343 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
8346 if (!strcmp ("private", p
))
8347 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
8350 if (!strcmp ("reduction", p
))
8351 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
8354 if (!strcmp ("schedule", p
))
8355 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
8356 else if (!strcmp ("shared", p
))
8357 result
= PRAGMA_OMP_CLAUSE_SHARED
;
8360 if (!strcmp ("untied", p
))
8361 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
8366 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
8367 c_parser_consume_token (parser
);
8372 /* Validate that a clause of the given type does not already exist. */
8375 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
8380 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
8381 if (OMP_CLAUSE_CODE (c
) == code
)
8383 location_t loc
= OMP_CLAUSE_LOCATION (c
);
8384 error_at (loc
, "too many %qs clauses", name
);
8392 variable-list , identifier
8394 If KIND is nonzero, create the appropriate node and install the
8395 decl in OMP_CLAUSE_DECL and add the node to the head of the list.
8396 If KIND is nonzero, CLAUSE_LOC is the location of the clause.
8398 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
8399 return the list created. */
8402 c_parser_omp_variable_list (c_parser
*parser
,
8403 location_t clause_loc
,
8404 enum omp_clause_code kind
,
8407 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
8408 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
8409 c_parser_error (parser
, "expected identifier");
8411 while (c_parser_next_token_is (parser
, CPP_NAME
)
8412 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
8414 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
8417 undeclared_variable (c_parser_peek_token (parser
)->location
,
8418 c_parser_peek_token (parser
)->value
);
8419 else if (t
== error_mark_node
)
8423 tree u
= build_omp_clause (clause_loc
, kind
);
8424 OMP_CLAUSE_DECL (u
) = t
;
8425 OMP_CLAUSE_CHAIN (u
) = list
;
8429 list
= tree_cons (t
, NULL_TREE
, list
);
8431 c_parser_consume_token (parser
);
8433 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
8436 c_parser_consume_token (parser
);
8442 /* Similarly, but expect leading and trailing parenthesis. This is a very
8443 common case for omp clauses. */
8446 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
8449 /* The clauses location. */
8450 location_t loc
= c_parser_peek_token (parser
)->location
;
8452 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8454 list
= c_parser_omp_variable_list (parser
, loc
, kind
, list
);
8455 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8461 collapse ( constant-expression ) */
8464 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
8466 tree c
, num
= error_mark_node
;
8470 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
8472 loc
= c_parser_peek_token (parser
)->location
;
8473 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8475 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
8476 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8478 if (num
== error_mark_node
)
8480 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
8481 || !host_integerp (num
, 0)
8482 || (n
= tree_low_cst (num
, 0)) <= 0
8486 "collapse argument needs positive constant integer expression");
8489 c
= build_omp_clause (loc
, OMP_CLAUSE_COLLAPSE
);
8490 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
8491 OMP_CLAUSE_CHAIN (c
) = list
;
8496 copyin ( variable-list ) */
8499 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
8501 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
8505 copyprivate ( variable-list ) */
8508 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
8510 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
8514 default ( shared | none ) */
8517 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
8519 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
8520 location_t loc
= c_parser_peek_token (parser
)->location
;
8523 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8525 if (c_parser_next_token_is (parser
, CPP_NAME
))
8527 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8532 if (strcmp ("none", p
) != 0)
8534 kind
= OMP_CLAUSE_DEFAULT_NONE
;
8538 if (strcmp ("shared", p
) != 0)
8540 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
8547 c_parser_consume_token (parser
);
8552 c_parser_error (parser
, "expected %<none%> or %<shared%>");
8554 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8556 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
8559 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
8560 c
= build_omp_clause (loc
, OMP_CLAUSE_DEFAULT
);
8561 OMP_CLAUSE_CHAIN (c
) = list
;
8562 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
8568 firstprivate ( variable-list ) */
8571 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
8573 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
8577 if ( expression ) */
8580 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
8582 location_t loc
= c_parser_peek_token (parser
)->location
;
8583 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
8585 tree t
= c_parser_paren_condition (parser
);
8588 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
8590 c
= build_omp_clause (loc
, OMP_CLAUSE_IF
);
8591 OMP_CLAUSE_IF_EXPR (c
) = t
;
8592 OMP_CLAUSE_CHAIN (c
) = list
;
8596 c_parser_error (parser
, "expected %<(%>");
8602 lastprivate ( variable-list ) */
8605 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
8607 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
8614 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8617 location_t loc
= c_parser_peek_token (parser
)->location
;
8619 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
8621 c
= build_omp_clause (loc
, OMP_CLAUSE_NOWAIT
);
8622 OMP_CLAUSE_CHAIN (c
) = list
;
8627 num_threads ( expression ) */
8630 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
8632 location_t num_threads_loc
= c_parser_peek_token (parser
)->location
;
8633 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8635 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
8636 tree c
, t
= c_parser_expression (parser
).value
;
8637 t
= c_fully_fold (t
, false, NULL
);
8639 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8641 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
8643 c_parser_error (parser
, "expected integer expression");
8647 /* Attempt to statically determine when the number isn't positive. */
8648 c
= fold_build2_loc (expr_loc
, LE_EXPR
, boolean_type_node
, t
,
8649 build_int_cst (TREE_TYPE (t
), 0));
8650 if (CAN_HAVE_LOCATION_P (c
))
8651 SET_EXPR_LOCATION (c
, expr_loc
);
8652 if (c
== boolean_true_node
)
8654 warning_at (expr_loc
, 0,
8655 "%<num_threads%> value must be positive");
8656 t
= integer_one_node
;
8659 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
8661 c
= build_omp_clause (num_threads_loc
, OMP_CLAUSE_NUM_THREADS
);
8662 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
8663 OMP_CLAUSE_CHAIN (c
) = list
;
8674 c_parser_omp_clause_ordered (c_parser
*parser
, tree list
)
8678 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
8680 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8681 OMP_CLAUSE_ORDERED
);
8682 OMP_CLAUSE_CHAIN (c
) = list
;
8688 private ( variable-list ) */
8691 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
8693 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
8697 reduction ( reduction-operator : variable-list )
8700 One of: + * - & ^ | && || */
8703 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
8705 location_t clause_loc
= c_parser_peek_token (parser
)->location
;
8706 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8708 enum tree_code code
;
8710 switch (c_parser_peek_token (parser
)->type
)
8722 code
= BIT_AND_EXPR
;
8725 code
= BIT_XOR_EXPR
;
8728 code
= BIT_IOR_EXPR
;
8731 code
= TRUTH_ANDIF_EXPR
;
8734 code
= TRUTH_ORIF_EXPR
;
8737 c_parser_error (parser
,
8738 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
8739 "%<^%>, %<|%>, %<&&%>, or %<||%>");
8740 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8743 c_parser_consume_token (parser
);
8744 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
8748 nl
= c_parser_omp_variable_list (parser
, clause_loc
,
8749 OMP_CLAUSE_REDUCTION
, list
);
8750 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
8751 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
8755 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8761 schedule ( schedule-kind )
8762 schedule ( schedule-kind , expression )
8765 static | dynamic | guided | runtime | auto
8769 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
8772 location_t loc
= c_parser_peek_token (parser
)->location
;
8774 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8777 c
= build_omp_clause (loc
, OMP_CLAUSE_SCHEDULE
);
8779 if (c_parser_next_token_is (parser
, CPP_NAME
))
8781 tree kind
= c_parser_peek_token (parser
)->value
;
8782 const char *p
= IDENTIFIER_POINTER (kind
);
8787 if (strcmp ("dynamic", p
) != 0)
8789 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
8793 if (strcmp ("guided", p
) != 0)
8795 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
8799 if (strcmp ("runtime", p
) != 0)
8801 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
8808 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
8809 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
8810 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
8811 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
8815 c_parser_consume_token (parser
);
8816 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8819 c_parser_consume_token (parser
);
8821 here
= c_parser_peek_token (parser
)->location
;
8822 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
8823 t
= c_fully_fold (t
, false, NULL
);
8825 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
8826 error_at (here
, "schedule %<runtime%> does not take "
8827 "a %<chunk_size%> parameter");
8828 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
8830 "schedule %<auto%> does not take "
8831 "a %<chunk_size%> parameter");
8832 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
8833 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
8835 c_parser_error (parser
, "expected integer expression");
8837 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8840 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
8841 "expected %<,%> or %<)%>");
8843 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
8844 OMP_CLAUSE_CHAIN (c
) = list
;
8848 c_parser_error (parser
, "invalid schedule kind");
8849 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8854 shared ( variable-list ) */
8857 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
8859 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
8866 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8870 /* FIXME: Should we allow duplicates? */
8871 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
8873 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8875 OMP_CLAUSE_CHAIN (c
) = list
;
8880 /* Parse all OpenMP clauses. The set clauses allowed by the directive
8881 is a bitmask in MASK. Return the list of clauses found; the result
8882 of clause default goes in *pdefault. */
8885 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
8888 tree clauses
= NULL
;
8891 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
8894 pragma_omp_clause c_kind
;
8896 tree prev
= clauses
;
8898 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
8899 c_parser_consume_token (parser
);
8902 here
= c_parser_peek_token (parser
)->location
;
8903 c_kind
= c_parser_omp_clause_name (parser
);
8907 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
8908 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
8909 c_name
= "collapse";
8911 case PRAGMA_OMP_CLAUSE_COPYIN
:
8912 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
8915 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
8916 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
8917 c_name
= "copyprivate";
8919 case PRAGMA_OMP_CLAUSE_DEFAULT
:
8920 clauses
= c_parser_omp_clause_default (parser
, clauses
);
8923 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
8924 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
8925 c_name
= "firstprivate";
8927 case PRAGMA_OMP_CLAUSE_IF
:
8928 clauses
= c_parser_omp_clause_if (parser
, clauses
);
8931 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
8932 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
8933 c_name
= "lastprivate";
8935 case PRAGMA_OMP_CLAUSE_NOWAIT
:
8936 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
8939 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
8940 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
8941 c_name
= "num_threads";
8943 case PRAGMA_OMP_CLAUSE_ORDERED
:
8944 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
8947 case PRAGMA_OMP_CLAUSE_PRIVATE
:
8948 clauses
= c_parser_omp_clause_private (parser
, clauses
);
8951 case PRAGMA_OMP_CLAUSE_REDUCTION
:
8952 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
8953 c_name
= "reduction";
8955 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
8956 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
8957 c_name
= "schedule";
8959 case PRAGMA_OMP_CLAUSE_SHARED
:
8960 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
8963 case PRAGMA_OMP_CLAUSE_UNTIED
:
8964 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
8968 c_parser_error (parser
, "expected %<#pragma omp%> clause");
8972 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
8974 /* Remove the invalid clause(s) from the list to avoid
8975 confusing the rest of the compiler. */
8977 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
8982 c_parser_skip_to_pragma_eol (parser
);
8984 return c_finish_omp_clauses (clauses
);
8991 In practice, we're also interested in adding the statement to an
8992 outer node. So it is convenient if we work around the fact that
8993 c_parser_statement calls add_stmt. */
8996 c_parser_omp_structured_block (c_parser
*parser
)
8998 tree stmt
= push_stmt_list ();
8999 c_parser_statement (parser
);
9000 return pop_stmt_list (stmt
);
9004 # pragma omp atomic new-line
9008 x binop= expr | x++ | ++x | x-- | --x
9010 +, *, -, /, &, ^, |, <<, >>
9012 where x is an lvalue expression with scalar type.
9014 LOC is the location of the #pragma token. */
9017 c_parser_omp_atomic (location_t loc
, c_parser
*parser
)
9021 enum tree_code code
;
9022 struct c_expr rhs_expr
;
9024 c_parser_skip_to_pragma_eol (parser
);
9026 lhs
= c_parser_unary_expression (parser
).value
;
9027 lhs
= c_fully_fold (lhs
, false, NULL
);
9028 switch (TREE_CODE (lhs
))
9032 c_parser_skip_to_end_of_block_or_statement (parser
);
9035 case PREINCREMENT_EXPR
:
9036 case POSTINCREMENT_EXPR
:
9037 lhs
= TREE_OPERAND (lhs
, 0);
9039 rhs
= integer_one_node
;
9042 case PREDECREMENT_EXPR
:
9043 case POSTDECREMENT_EXPR
:
9044 lhs
= TREE_OPERAND (lhs
, 0);
9046 rhs
= integer_one_node
;
9050 if (TREE_CODE (TREE_OPERAND (lhs
, 0)) == SAVE_EXPR
9051 && TREE_CODE (TREE_OPERAND (lhs
, 1)) == COMPOUND_EXPR
9052 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0)) == MODIFY_EXPR
9053 && TREE_OPERAND (TREE_OPERAND (lhs
, 1), 1) == TREE_OPERAND (lhs
, 0)
9054 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
9055 (TREE_OPERAND (lhs
, 1), 0), 0)))
9057 /* Undo effects of boolean_increment for post {in,de}crement. */
9058 lhs
= TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0);
9061 if (TREE_CODE (lhs
) == MODIFY_EXPR
9062 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs
, 0))) == BOOLEAN_TYPE
)
9064 /* Undo effects of boolean_increment. */
9065 if (integer_onep (TREE_OPERAND (lhs
, 1)))
9067 /* This is pre or post increment. */
9068 rhs
= TREE_OPERAND (lhs
, 1);
9069 lhs
= TREE_OPERAND (lhs
, 0);
9073 if (TREE_CODE (TREE_OPERAND (lhs
, 1)) == TRUTH_NOT_EXPR
9074 && TREE_OPERAND (lhs
, 0)
9075 == TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0))
9077 /* This is pre or post decrement. */
9078 rhs
= TREE_OPERAND (lhs
, 1);
9079 lhs
= TREE_OPERAND (lhs
, 0);
9086 switch (c_parser_peek_token (parser
)->type
)
9092 code
= TRUNC_DIV_EXPR
;
9107 code
= BIT_AND_EXPR
;
9110 code
= BIT_IOR_EXPR
;
9113 code
= BIT_XOR_EXPR
;
9116 c_parser_error (parser
,
9117 "invalid operator for %<#pragma omp atomic%>");
9121 /* Arrange to pass the location of the assignment operator to
9122 c_finish_omp_atomic. */
9123 loc
= c_parser_peek_token (parser
)->location
;
9124 c_parser_consume_token (parser
);
9126 location_t rhs_loc
= c_parser_peek_token (parser
)->location
;
9127 rhs_expr
= c_parser_expression (parser
);
9128 rhs_expr
= default_function_array_read_conversion (rhs_loc
, rhs_expr
);
9130 rhs
= rhs_expr
.value
;
9131 rhs
= c_fully_fold (rhs
, false, NULL
);
9134 stmt
= c_finish_omp_atomic (loc
, code
, lhs
, rhs
);
9135 if (stmt
!= error_mark_node
)
9137 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9142 # pragma omp barrier new-line
9146 c_parser_omp_barrier (c_parser
*parser
)
9148 location_t loc
= c_parser_peek_token (parser
)->location
;
9149 c_parser_consume_pragma (parser
);
9150 c_parser_skip_to_pragma_eol (parser
);
9152 c_finish_omp_barrier (loc
);
9156 # pragma omp critical [(name)] new-line
9159 LOC is the location of the #pragma itself. */
9162 c_parser_omp_critical (location_t loc
, c_parser
*parser
)
9164 tree stmt
, name
= NULL
;
9166 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9168 c_parser_consume_token (parser
);
9169 if (c_parser_next_token_is (parser
, CPP_NAME
))
9171 name
= c_parser_peek_token (parser
)->value
;
9172 c_parser_consume_token (parser
);
9173 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9176 c_parser_error (parser
, "expected identifier");
9178 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9179 c_parser_error (parser
, "expected %<(%> or end of line");
9180 c_parser_skip_to_pragma_eol (parser
);
9182 stmt
= c_parser_omp_structured_block (parser
);
9183 return c_finish_omp_critical (loc
, stmt
, name
);
9187 # pragma omp flush flush-vars[opt] new-line
9190 ( variable-list ) */
9193 c_parser_omp_flush (c_parser
*parser
)
9195 location_t loc
= c_parser_peek_token (parser
)->location
;
9196 c_parser_consume_pragma (parser
);
9197 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9198 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9199 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9200 c_parser_error (parser
, "expected %<(%> or end of line");
9201 c_parser_skip_to_pragma_eol (parser
);
9203 c_finish_omp_flush (loc
);
9206 /* Parse the restricted form of the for statement allowed by OpenMP.
9207 The real trick here is to determine the loop control variable early
9208 so that we can push a new decl if necessary to make it private.
9209 LOC is the location of the OMP in "#pragma omp". */
9212 c_parser_omp_for_loop (location_t loc
,
9213 c_parser
*parser
, tree clauses
, tree
*par_clauses
)
9215 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
9216 tree declv
, condv
, incrv
, initv
, ret
= NULL
;
9217 bool fail
= false, open_brace_parsed
= false;
9218 int i
, collapse
= 1, nbraces
= 0;
9220 VEC(tree
,gc
) *for_block
= make_tree_vector ();
9222 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
9223 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
9224 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
9226 gcc_assert (collapse
>= 1);
9228 declv
= make_tree_vec (collapse
);
9229 initv
= make_tree_vec (collapse
);
9230 condv
= make_tree_vec (collapse
);
9231 incrv
= make_tree_vec (collapse
);
9233 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
9235 c_parser_error (parser
, "for statement expected");
9238 for_loc
= c_parser_peek_token (parser
)->location
;
9239 c_parser_consume_token (parser
);
9241 for (i
= 0; i
< collapse
; i
++)
9245 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9248 /* Parse the initialization declaration or expression. */
9249 if (c_parser_next_tokens_start_declaration (parser
))
9252 VEC_safe_push (tree
, gc
, for_block
, c_begin_compound_stmt (true));
9253 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
9254 decl
= check_for_loop_decls (for_loc
, flag_isoc99
);
9257 if (DECL_INITIAL (decl
) == error_mark_node
)
9258 decl
= error_mark_node
;
9261 else if (c_parser_next_token_is (parser
, CPP_NAME
)
9262 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
9264 struct c_expr decl_exp
;
9265 struct c_expr init_exp
;
9266 location_t init_loc
;
9268 decl_exp
= c_parser_postfix_expression (parser
);
9269 decl
= decl_exp
.value
;
9271 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
9273 init_loc
= c_parser_peek_token (parser
)->location
;
9274 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
9275 init_exp
= default_function_array_read_conversion (init_loc
,
9277 init
= build_modify_expr (init_loc
, decl
, decl_exp
.original_type
,
9278 NOP_EXPR
, init_loc
, init_exp
.value
,
9279 init_exp
.original_type
);
9280 init
= c_process_expr_stmt (init_loc
, init
);
9282 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9287 c_parser_error (parser
,
9288 "expected iteration declaration or initialization");
9289 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
9295 /* Parse the loop condition. */
9297 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
9299 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
9300 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
);
9302 cond
= cond_expr
.value
;
9303 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
9304 cond
= c_fully_fold (cond
, false, NULL
);
9305 switch (cond_expr
.original_code
)
9313 /* Can't be cond = error_mark_node, because we want to preserve
9314 the location until c_finish_omp_for. */
9315 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
9318 protected_set_expr_location (cond
, cond_loc
);
9320 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9322 /* Parse the increment expression. */
9324 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
9326 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
9328 incr
= c_process_expr_stmt (incr_loc
,
9329 c_parser_expression (parser
).value
);
9331 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9333 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
9337 TREE_VEC_ELT (declv
, i
) = decl
;
9338 TREE_VEC_ELT (initv
, i
) = init
;
9339 TREE_VEC_ELT (condv
, i
) = cond
;
9340 TREE_VEC_ELT (incrv
, i
) = incr
;
9344 if (i
== collapse
- 1)
9347 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
9348 in between the collapsed for loops to be still considered perfectly
9349 nested. Hopefully the final version clarifies this.
9350 For now handle (multiple) {'s and empty statements. */
9353 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9355 c_parser_consume_token (parser
);
9358 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
9360 c_parser_consume_token (parser
);
9364 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9365 c_parser_consume_token (parser
);
9368 c_parser_error (parser
, "not enough perfectly nested loops");
9371 open_brace_parsed
= true;
9381 nbraces
+= bracecount
;
9384 save_break
= c_break_label
;
9385 c_break_label
= size_one_node
;
9386 save_cont
= c_cont_label
;
9387 c_cont_label
= NULL_TREE
;
9388 body
= push_stmt_list ();
9390 if (open_brace_parsed
)
9392 location_t here
= c_parser_peek_token (parser
)->location
;
9393 stmt
= c_begin_compound_stmt (true);
9394 c_parser_compound_statement_nostart (parser
);
9395 add_stmt (c_end_compound_stmt (here
, stmt
, true));
9398 add_stmt (c_parser_c99_block_statement (parser
));
9401 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_cont_label
);
9402 SET_EXPR_LOCATION (t
, loc
);
9406 body
= pop_stmt_list (body
);
9407 c_break_label
= save_break
;
9408 c_cont_label
= save_cont
;
9412 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9414 c_parser_consume_token (parser
);
9417 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9418 c_parser_consume_token (parser
);
9421 c_parser_error (parser
, "collapsed loops not perfectly nested");
9424 location_t here
= c_parser_peek_token (parser
)->location
;
9425 stmt
= c_begin_compound_stmt (true);
9427 c_parser_compound_statement_nostart (parser
);
9428 body
= c_end_compound_stmt (here
, stmt
, true);
9435 /* Only bother calling c_finish_omp_for if we haven't already generated
9436 an error from the initialization parsing. */
9439 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
9442 if (par_clauses
!= NULL
)
9445 for (c
= par_clauses
; *c
; )
9446 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
9447 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
9448 c
= &OMP_CLAUSE_CHAIN (*c
);
9451 for (i
= 0; i
< collapse
; i
++)
9452 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
9455 c
= &OMP_CLAUSE_CHAIN (*c
);
9456 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
9459 "iteration variable %qD should not be firstprivate",
9460 OMP_CLAUSE_DECL (*c
));
9461 *c
= OMP_CLAUSE_CHAIN (*c
);
9465 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
9466 change it to shared (decl) in
9467 OMP_PARALLEL_CLAUSES. */
9468 tree l
= build_omp_clause (OMP_CLAUSE_LOCATION (*c
),
9469 OMP_CLAUSE_LASTPRIVATE
);
9470 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
9471 OMP_CLAUSE_CHAIN (l
) = clauses
;
9473 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
9477 OMP_FOR_CLAUSES (stmt
) = clauses
;
9482 while (!VEC_empty (tree
, for_block
))
9484 /* FIXME diagnostics: LOC below should be the actual location of
9485 this particular for block. We need to build a list of
9486 locations to go along with FOR_BLOCK. */
9487 stmt
= c_end_compound_stmt (loc
, VEC_pop (tree
, for_block
), true);
9490 release_tree_vector (for_block
);
9495 #pragma omp for for-clause[optseq] new-line
9498 LOC is the location of the #pragma token.
9501 #define OMP_FOR_CLAUSE_MASK \
9502 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9503 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9504 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9505 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9506 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
9507 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
9508 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
9509 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9512 c_parser_omp_for (location_t loc
, c_parser
*parser
)
9514 tree block
, clauses
, ret
;
9516 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
9519 block
= c_begin_compound_stmt (true);
9520 ret
= c_parser_omp_for_loop (loc
, parser
, clauses
, NULL
);
9521 block
= c_end_compound_stmt (loc
, block
, true);
9528 # pragma omp master new-line
9531 LOC is the location of the #pragma token.
9535 c_parser_omp_master (location_t loc
, c_parser
*parser
)
9537 c_parser_skip_to_pragma_eol (parser
);
9538 return c_finish_omp_master (loc
, c_parser_omp_structured_block (parser
));
9542 # pragma omp ordered new-line
9545 LOC is the location of the #pragma itself.
9549 c_parser_omp_ordered (location_t loc
, c_parser
*parser
)
9551 c_parser_skip_to_pragma_eol (parser
);
9552 return c_finish_omp_ordered (loc
, c_parser_omp_structured_block (parser
));
9558 { section-sequence }
9561 section-directive[opt] structured-block
9562 section-sequence section-directive structured-block
9564 SECTIONS_LOC is the location of the #pragma omp sections. */
9567 c_parser_omp_sections_scope (location_t sections_loc
, c_parser
*parser
)
9570 bool error_suppress
= false;
9573 loc
= c_parser_peek_token (parser
)->location
;
9574 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
9576 /* Avoid skipping until the end of the block. */
9577 parser
->error
= false;
9581 stmt
= push_stmt_list ();
9583 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
9585 substmt
= push_stmt_list ();
9589 c_parser_statement (parser
);
9591 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9593 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9595 if (c_parser_next_token_is (parser
, CPP_EOF
))
9599 substmt
= pop_stmt_list (substmt
);
9600 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9601 SET_EXPR_LOCATION (substmt
, loc
);
9607 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9609 if (c_parser_next_token_is (parser
, CPP_EOF
))
9612 loc
= c_parser_peek_token (parser
)->location
;
9613 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9615 c_parser_consume_pragma (parser
);
9616 c_parser_skip_to_pragma_eol (parser
);
9617 error_suppress
= false;
9619 else if (!error_suppress
)
9621 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
9622 error_suppress
= true;
9625 substmt
= c_parser_omp_structured_block (parser
);
9626 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9627 SET_EXPR_LOCATION (substmt
, loc
);
9630 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
9631 "expected %<#pragma omp section%> or %<}%>");
9633 substmt
= pop_stmt_list (stmt
);
9635 stmt
= make_node (OMP_SECTIONS
);
9636 SET_EXPR_LOCATION (stmt
, sections_loc
);
9637 TREE_TYPE (stmt
) = void_type_node
;
9638 OMP_SECTIONS_BODY (stmt
) = substmt
;
9640 return add_stmt (stmt
);
9644 # pragma omp sections sections-clause[optseq] newline
9647 LOC is the location of the #pragma token.
9650 #define OMP_SECTIONS_CLAUSE_MASK \
9651 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9652 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9653 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9654 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9655 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9658 c_parser_omp_sections (location_t loc
, c_parser
*parser
)
9660 tree block
, clauses
, ret
;
9662 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
9663 "#pragma omp sections");
9665 block
= c_begin_compound_stmt (true);
9666 ret
= c_parser_omp_sections_scope (loc
, parser
);
9668 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
9669 block
= c_end_compound_stmt (loc
, block
, true);
9676 # pragma parallel parallel-clause new-line
9677 # pragma parallel for parallel-for-clause new-line
9678 # pragma parallel sections parallel-sections-clause new-line
9680 LOC is the location of the #pragma token.
9683 #define OMP_PARALLEL_CLAUSE_MASK \
9684 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9685 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9686 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9687 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9688 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
9689 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
9690 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9691 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
9694 c_parser_omp_parallel (location_t loc
, c_parser
*parser
)
9696 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
9697 const char *p_name
= "#pragma omp parallel";
9698 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
9699 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
9701 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9703 c_parser_consume_token (parser
);
9704 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
9705 p_name
= "#pragma omp parallel for";
9706 mask
|= OMP_FOR_CLAUSE_MASK
;
9707 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9709 else if (c_parser_next_token_is (parser
, CPP_NAME
))
9711 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
9712 if (strcmp (p
, "sections") == 0)
9714 c_parser_consume_token (parser
);
9715 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
9716 p_name
= "#pragma omp parallel sections";
9717 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
9718 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9722 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
9726 case PRAGMA_OMP_PARALLEL
:
9727 block
= c_begin_omp_parallel ();
9728 c_parser_statement (parser
);
9729 stmt
= c_finish_omp_parallel (loc
, clauses
, block
);
9732 case PRAGMA_OMP_PARALLEL_FOR
:
9733 block
= c_begin_omp_parallel ();
9734 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9735 c_parser_omp_for_loop (loc
, parser
, ws_clause
, &par_clause
);
9736 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9737 OMP_PARALLEL_COMBINED (stmt
) = 1;
9740 case PRAGMA_OMP_PARALLEL_SECTIONS
:
9741 block
= c_begin_omp_parallel ();
9742 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9743 stmt
= c_parser_omp_sections_scope (loc
, parser
);
9745 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
9746 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9747 OMP_PARALLEL_COMBINED (stmt
) = 1;
9758 # pragma omp single single-clause[optseq] new-line
9761 LOC is the location of the #pragma.
9764 #define OMP_SINGLE_CLAUSE_MASK \
9765 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9766 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9767 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
9768 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9771 c_parser_omp_single (location_t loc
, c_parser
*parser
)
9773 tree stmt
= make_node (OMP_SINGLE
);
9774 SET_EXPR_LOCATION (stmt
, loc
);
9775 TREE_TYPE (stmt
) = void_type_node
;
9777 OMP_SINGLE_CLAUSES (stmt
)
9778 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
9779 "#pragma omp single");
9780 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
9782 return add_stmt (stmt
);
9786 # pragma omp task task-clause[optseq] new-line
9788 LOC is the location of the #pragma.
9791 #define OMP_TASK_CLAUSE_MASK \
9792 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9793 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
9794 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9795 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9796 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9797 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
9800 c_parser_omp_task (location_t loc
, c_parser
*parser
)
9802 tree clauses
, block
;
9804 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
9805 "#pragma omp task");
9807 block
= c_begin_omp_task ();
9808 c_parser_statement (parser
);
9809 return c_finish_omp_task (loc
, clauses
, block
);
9813 # pragma omp taskwait new-line
9817 c_parser_omp_taskwait (c_parser
*parser
)
9819 location_t loc
= c_parser_peek_token (parser
)->location
;
9820 c_parser_consume_pragma (parser
);
9821 c_parser_skip_to_pragma_eol (parser
);
9823 c_finish_omp_taskwait (loc
);
9826 /* Main entry point to parsing most OpenMP pragmas. */
9829 c_parser_omp_construct (c_parser
*parser
)
9831 enum pragma_kind p_kind
;
9835 loc
= c_parser_peek_token (parser
)->location
;
9836 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
9837 c_parser_consume_pragma (parser
);
9841 case PRAGMA_OMP_ATOMIC
:
9842 c_parser_omp_atomic (loc
, parser
);
9844 case PRAGMA_OMP_CRITICAL
:
9845 stmt
= c_parser_omp_critical (loc
, parser
);
9847 case PRAGMA_OMP_FOR
:
9848 stmt
= c_parser_omp_for (loc
, parser
);
9850 case PRAGMA_OMP_MASTER
:
9851 stmt
= c_parser_omp_master (loc
, parser
);
9853 case PRAGMA_OMP_ORDERED
:
9854 stmt
= c_parser_omp_ordered (loc
, parser
);
9856 case PRAGMA_OMP_PARALLEL
:
9857 stmt
= c_parser_omp_parallel (loc
, parser
);
9859 case PRAGMA_OMP_SECTIONS
:
9860 stmt
= c_parser_omp_sections (loc
, parser
);
9862 case PRAGMA_OMP_SINGLE
:
9863 stmt
= c_parser_omp_single (loc
, parser
);
9865 case PRAGMA_OMP_TASK
:
9866 stmt
= c_parser_omp_task (loc
, parser
);
9873 gcc_assert (EXPR_LOCATION (stmt
) != UNKNOWN_LOCATION
);
9878 # pragma omp threadprivate (variable-list) */
9881 c_parser_omp_threadprivate (c_parser
*parser
)
9886 c_parser_consume_pragma (parser
);
9887 loc
= c_parser_peek_token (parser
)->location
;
9888 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9890 /* Mark every variable in VARS to be assigned thread local storage. */
9891 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
9893 tree v
= TREE_PURPOSE (t
);
9895 /* FIXME diagnostics: Ideally we should keep individual
9896 locations for all the variables in the var list to make the
9897 following errors more precise. Perhaps
9898 c_parser_omp_var_list_parens() should construct a list of
9899 locations to go along with the var list. */
9901 /* If V had already been marked threadprivate, it doesn't matter
9902 whether it had been used prior to this point. */
9903 if (TREE_CODE (v
) != VAR_DECL
)
9904 error_at (loc
, "%qD is not a variable", v
);
9905 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
9906 error_at (loc
, "%qE declared %<threadprivate%> after first use", v
);
9907 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
9908 error_at (loc
, "automatic variable %qE cannot be %<threadprivate%>", v
);
9909 else if (TREE_TYPE (v
) == error_mark_node
)
9911 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
9912 error_at (loc
, "%<threadprivate%> %qE has incomplete type", v
);
9915 if (! DECL_THREAD_LOCAL_P (v
))
9917 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
9918 /* If rtl has been already set for this var, call
9919 make_decl_rtl once again, so that encode_section_info
9920 has a chance to look at the new decl flags. */
9921 if (DECL_RTL_SET_P (v
))
9924 C_DECL_THREADPRIVATE_P (v
) = 1;
9928 c_parser_skip_to_pragma_eol (parser
);
9932 /* Parse a single source file. */
9937 /* Use local storage to begin. If the first token is a pragma, parse it.
9938 If it is #pragma GCC pch_preprocess, then this will load a PCH file
9939 which will cause garbage collection. */
9942 memset (&tparser
, 0, sizeof tparser
);
9943 the_parser
= &tparser
;
9945 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
9946 c_parser_pragma_pch_preprocess (&tparser
);
9948 the_parser
= ggc_alloc_c_parser ();
9949 *the_parser
= tparser
;
9951 /* Initialize EH, if we've been told to do so. */
9952 if (flag_exceptions
)
9953 using_eh_for_cleanups ();
9955 c_parser_translation_unit (the_parser
);
9959 #include "gt-c-parser.h"