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
258 if (parser
->objc_pq_context
)
260 token
->type
= CPP_KEYWORD
;
261 token
->keyword
= rid_code
;
264 else if (parser
->objc_could_be_foreach_context
265 && rid_code
== RID_IN
)
267 /* We are in Objective-C, inside a (potential)
268 foreach context (which means after having
269 parsed 'for (', but before having parsed ';'),
270 and we found 'in'. We consider it the keyword
271 which terminates the declaration at the
272 beginning of a foreach-statement. Note that
273 this means you can't use 'in' for anything else
274 in that context; in particular, in Objective-C
275 you can't use 'in' as the name of the running
276 variable in a C for loop. We could potentially
277 try to add code here to disambiguate, but it
278 seems a reasonable limitation.
280 token
->type
= CPP_KEYWORD
;
281 token
->keyword
= rid_code
;
284 /* Else, "pq" keywords outside of the "pq" context are
285 not keywords, and we fall through to the code for
289 else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code
))
291 /* We found an Objective-C "property attribute" keyword
292 (readonly, copies, getter, setter, ivar). These are
293 only valid in the property context. */
294 if (parser
->objc_property_attr_context
)
296 token
->type
= CPP_KEYWORD
;
297 token
->keyword
= rid_code
;
300 /* Else they are not special keywords.
303 else if (c_dialect_objc ()
304 && (OBJC_IS_AT_KEYWORD (rid_code
)
305 || OBJC_IS_CXX_KEYWORD (rid_code
)))
307 /* We found one of the Objective-C "@" keywords (defs,
308 selector, synchronized, etc) or one of the
309 Objective-C "cxx" keywords (class, private,
310 protected, public, try, catch, throw) without a
311 preceding '@' sign. Do nothing and fall through to
312 the code for normal tokens (in C++ we would still
313 consider the CXX ones keywords, but not in C).
319 token
->type
= CPP_KEYWORD
;
320 token
->keyword
= rid_code
;
325 decl
= lookup_name (token
->value
);
328 if (TREE_CODE (decl
) == TYPE_DECL
)
330 token
->id_kind
= C_ID_TYPENAME
;
334 else if (c_dialect_objc ())
336 tree objc_interface_decl
= objc_is_class_name (token
->value
);
337 /* Objective-C class names are in the same namespace as
338 variables and typedefs, and hence are shadowed by local
340 if (objc_interface_decl
341 && (global_bindings_p ()
342 || (!objc_force_identifier
&& !decl
)))
344 token
->value
= objc_interface_decl
;
345 token
->id_kind
= C_ID_CLASSNAME
;
349 token
->id_kind
= C_ID_ID
;
353 /* This only happens in Objective-C; it must be a keyword. */
354 token
->type
= CPP_KEYWORD
;
355 switch (C_RID_CODE (token
->value
))
357 /* Replace 'class' with '@class', 'private' with '@private',
358 etc. This prevents confusion with the C++ keyword
359 'class', and makes the tokens consistent with other
360 Objective-C 'AT' keywords. For example '@class' is
361 reported as RID_AT_CLASS which is consistent with
362 '@synchronized', which is reported as
365 case RID_CLASS
: token
->keyword
= RID_AT_CLASS
; break;
366 case RID_PRIVATE
: token
->keyword
= RID_AT_PRIVATE
; break;
367 case RID_PROTECTED
: token
->keyword
= RID_AT_PROTECTED
; break;
368 case RID_PUBLIC
: token
->keyword
= RID_AT_PUBLIC
; break;
369 case RID_THROW
: token
->keyword
= RID_AT_THROW
; break;
370 case RID_TRY
: token
->keyword
= RID_AT_TRY
; break;
371 case RID_CATCH
: token
->keyword
= RID_AT_CATCH
; break;
372 default: token
->keyword
= C_RID_CODE (token
->value
);
377 case CPP_CLOSE_PAREN
:
379 /* These tokens may affect the interpretation of any identifiers
380 following, if doing Objective-C. */
381 if (c_dialect_objc ())
382 parser
->objc_need_raw_identifier
= false;
385 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
386 token
->pragma_kind
= (enum pragma_kind
) TREE_INT_CST_LOW (token
->value
);
392 timevar_pop (TV_LEX
);
395 /* Return a pointer to the next token from PARSER, reading it in if
398 static inline c_token
*
399 c_parser_peek_token (c_parser
*parser
)
401 if (parser
->tokens_avail
== 0)
403 c_lex_one_token (parser
, &parser
->tokens
[0]);
404 parser
->tokens_avail
= 1;
406 return &parser
->tokens
[0];
409 /* Return true if the next token from PARSER has the indicated
413 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
415 return c_parser_peek_token (parser
)->type
== type
;
418 /* Return true if the next token from PARSER does not have the
422 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
424 return !c_parser_next_token_is (parser
, type
);
427 /* Return true if the next token from PARSER is the indicated
431 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
433 return c_parser_peek_token (parser
)->keyword
== keyword
;
436 /* Return a pointer to the next-but-one token from PARSER, reading it
437 in if necessary. The next token is already read in. */
440 c_parser_peek_2nd_token (c_parser
*parser
)
442 if (parser
->tokens_avail
>= 2)
443 return &parser
->tokens
[1];
444 gcc_assert (parser
->tokens_avail
== 1);
445 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
446 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
447 c_lex_one_token (parser
, &parser
->tokens
[1]);
448 parser
->tokens_avail
= 2;
449 return &parser
->tokens
[1];
452 /* Return true if TOKEN can start a type name,
455 c_token_starts_typename (c_token
*token
)
460 switch (token
->id_kind
)
469 gcc_assert (c_dialect_objc ());
475 switch (token
->keyword
)
508 if (c_dialect_objc ())
516 enum c_lookahead_kind
{
517 /* Always treat unknown identifiers as typenames. */
520 /* Could be parsing a nonabstract declarator. Only treat an identifier
521 as a typename if followed by another identifier or a star. */
522 cla_nonabstract_decl
,
524 /* Never treat identifiers as typenames. */
528 /* Return true if the next token from PARSER can start a type name,
529 false otherwise. LA specifies how to do lookahead in order to
530 detect unknown type names. If unsure, pick CLA_PREFER_ID. */
533 c_parser_next_tokens_start_typename (c_parser
*parser
, enum c_lookahead_kind la
)
535 c_token
*token
= c_parser_peek_token (parser
);
536 if (c_token_starts_typename (token
))
539 /* Try a bit harder to detect an unknown typename. */
540 if (la
!= cla_prefer_id
541 && token
->type
== CPP_NAME
542 && token
->id_kind
== C_ID_ID
544 /* Do not try too hard when we could have "object in array". */
545 && !parser
->objc_could_be_foreach_context
547 && (la
== cla_prefer_type
548 || c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
549 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
551 /* Only unknown identifiers. */
552 && !lookup_name (token
->value
))
558 /* Return true if TOKEN is a type qualifier, false otherwise. */
560 c_token_is_qualifier (c_token
*token
)
565 switch (token
->id_kind
)
573 switch (token
->keyword
)
590 /* Return true if the next token from PARSER is a type qualifier,
593 c_parser_next_token_is_qualifier (c_parser
*parser
)
595 c_token
*token
= c_parser_peek_token (parser
);
596 return c_token_is_qualifier (token
);
599 /* Return true if TOKEN can start declaration specifiers, false
602 c_token_starts_declspecs (c_token
*token
)
607 switch (token
->id_kind
)
616 gcc_assert (c_dialect_objc ());
622 switch (token
->keyword
)
662 if (c_dialect_objc ())
671 /* Return true if TOKEN can start declaration specifiers or a static
672 assertion, false otherwise. */
674 c_token_starts_declaration (c_token
*token
)
676 if (c_token_starts_declspecs (token
)
677 || token
->keyword
== RID_STATIC_ASSERT
)
683 /* Return true if the next token from PARSER can start declaration
684 specifiers, false otherwise. */
686 c_parser_next_token_starts_declspecs (c_parser
*parser
)
688 c_token
*token
= c_parser_peek_token (parser
);
690 /* In Objective-C, a classname normally starts a declspecs unless it
691 is immediately followed by a dot. In that case, it is the
692 Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
693 setter/getter on the class. c_token_starts_declspecs() can't
694 differentiate between the two cases because it only checks the
695 current token, so we have a special check here. */
696 if (c_dialect_objc ()
697 && token
->type
== CPP_NAME
698 && token
->id_kind
== C_ID_CLASSNAME
699 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
702 return c_token_starts_declspecs (token
);
705 /* Return true if the next tokens from PARSER can start declaration
706 specifiers or a static assertion, false otherwise. */
708 c_parser_next_tokens_start_declaration (c_parser
*parser
)
710 c_token
*token
= c_parser_peek_token (parser
);
713 if (c_dialect_objc ()
714 && token
->type
== CPP_NAME
715 && token
->id_kind
== C_ID_CLASSNAME
716 && c_parser_peek_2nd_token (parser
)->type
== CPP_DOT
)
719 /* Labels do not start declarations. */
720 if (token
->type
== CPP_NAME
721 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
724 if (c_token_starts_declaration (token
))
727 if (c_parser_next_tokens_start_typename (parser
, cla_nonabstract_decl
))
733 /* Consume the next token from PARSER. */
736 c_parser_consume_token (c_parser
*parser
)
738 gcc_assert (parser
->tokens_avail
>= 1);
739 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
740 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
741 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
742 if (parser
->tokens_avail
== 2)
743 parser
->tokens
[0] = parser
->tokens
[1];
744 parser
->tokens_avail
--;
747 /* Expect the current token to be a #pragma. Consume it and remember
748 that we've begun parsing a pragma. */
751 c_parser_consume_pragma (c_parser
*parser
)
753 gcc_assert (!parser
->in_pragma
);
754 gcc_assert (parser
->tokens_avail
>= 1);
755 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
756 if (parser
->tokens_avail
== 2)
757 parser
->tokens
[0] = parser
->tokens
[1];
758 parser
->tokens_avail
--;
759 parser
->in_pragma
= true;
762 /* Update the globals input_location and in_system_header from
765 c_parser_set_source_position_from_token (c_token
*token
)
767 if (token
->type
!= CPP_EOF
)
769 input_location
= token
->location
;
773 /* Issue a diagnostic of the form
774 FILE:LINE: MESSAGE before TOKEN
775 where TOKEN is the next token in the input stream of PARSER.
776 MESSAGE (specified by the caller) is usually of the form "expected
779 Do not issue a diagnostic if still recovering from an error.
781 ??? This is taken from the C++ parser, but building up messages in
782 this way is not i18n-friendly and some other approach should be
786 c_parser_error (c_parser
*parser
, const char *gmsgid
)
788 c_token
*token
= c_parser_peek_token (parser
);
791 parser
->error
= true;
794 /* This diagnostic makes more sense if it is tagged to the line of
795 the token we just peeked at. */
796 c_parser_set_source_position_from_token (token
);
797 c_parse_error (gmsgid
,
798 /* Because c_parse_error does not understand
799 CPP_KEYWORD, keywords are treated like
801 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
802 /* ??? The C parser does not save the cpp flags of a
803 token, we need to pass 0 here and we will not get
804 the source spelling of some tokens but rather the
805 canonical spelling. */
806 token
->value
, /*flags=*/0);
809 /* If the next token is of the indicated TYPE, consume it. Otherwise,
810 issue the error MSGID. If MSGID is NULL then a message has already
811 been produced and no message will be produced this time. Returns
812 true if found, false otherwise. */
815 c_parser_require (c_parser
*parser
,
819 if (c_parser_next_token_is (parser
, type
))
821 c_parser_consume_token (parser
);
826 c_parser_error (parser
, msgid
);
831 /* If the next token is the indicated keyword, consume it. Otherwise,
832 issue the error MSGID. Returns true if found, false otherwise. */
835 c_parser_require_keyword (c_parser
*parser
,
839 if (c_parser_next_token_is_keyword (parser
, keyword
))
841 c_parser_consume_token (parser
);
846 c_parser_error (parser
, msgid
);
851 /* Like c_parser_require, except that tokens will be skipped until the
852 desired token is found. An error message is still produced if the
853 next token is not as expected. If MSGID is NULL then a message has
854 already been produced and no message will be produced this
858 c_parser_skip_until_found (c_parser
*parser
,
862 unsigned nesting_depth
= 0;
864 if (c_parser_require (parser
, type
, msgid
))
867 /* Skip tokens until the desired token is found. */
870 /* Peek at the next token. */
871 c_token
*token
= c_parser_peek_token (parser
);
872 /* If we've reached the token we want, consume it and stop. */
873 if (token
->type
== type
&& !nesting_depth
)
875 c_parser_consume_token (parser
);
879 /* If we've run out of tokens, stop. */
880 if (token
->type
== CPP_EOF
)
882 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
884 if (token
->type
== CPP_OPEN_BRACE
885 || token
->type
== CPP_OPEN_PAREN
886 || token
->type
== CPP_OPEN_SQUARE
)
888 else if (token
->type
== CPP_CLOSE_BRACE
889 || token
->type
== CPP_CLOSE_PAREN
890 || token
->type
== CPP_CLOSE_SQUARE
)
892 if (nesting_depth
-- == 0)
895 /* Consume this token. */
896 c_parser_consume_token (parser
);
898 parser
->error
= false;
901 /* Skip tokens until the end of a parameter is found, but do not
902 consume the comma, semicolon or closing delimiter. */
905 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
907 unsigned nesting_depth
= 0;
911 c_token
*token
= c_parser_peek_token (parser
);
912 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
915 /* If we've run out of tokens, stop. */
916 if (token
->type
== CPP_EOF
)
918 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
920 if (token
->type
== CPP_OPEN_BRACE
921 || token
->type
== CPP_OPEN_PAREN
922 || token
->type
== CPP_OPEN_SQUARE
)
924 else if (token
->type
== CPP_CLOSE_BRACE
925 || token
->type
== CPP_CLOSE_PAREN
926 || token
->type
== CPP_CLOSE_SQUARE
)
928 if (nesting_depth
-- == 0)
931 /* Consume this token. */
932 c_parser_consume_token (parser
);
934 parser
->error
= false;
937 /* Expect to be at the end of the pragma directive and consume an
938 end of line marker. */
941 c_parser_skip_to_pragma_eol (c_parser
*parser
)
943 gcc_assert (parser
->in_pragma
);
944 parser
->in_pragma
= false;
946 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
949 c_token
*token
= c_parser_peek_token (parser
);
950 if (token
->type
== CPP_EOF
)
952 if (token
->type
== CPP_PRAGMA_EOL
)
954 c_parser_consume_token (parser
);
957 c_parser_consume_token (parser
);
960 parser
->error
= false;
963 /* Skip tokens until we have consumed an entire block, or until we
964 have consumed a non-nested ';'. */
967 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
969 unsigned nesting_depth
= 0;
970 bool save_error
= parser
->error
;
976 /* Peek at the next token. */
977 token
= c_parser_peek_token (parser
);
985 if (parser
->in_pragma
)
990 /* If the next token is a ';', we have reached the
991 end of the statement. */
994 /* Consume the ';'. */
995 c_parser_consume_token (parser
);
1000 case CPP_CLOSE_BRACE
:
1001 /* If the next token is a non-nested '}', then we have
1002 reached the end of the current block. */
1003 if (nesting_depth
== 0 || --nesting_depth
== 0)
1005 c_parser_consume_token (parser
);
1010 case CPP_OPEN_BRACE
:
1011 /* If it the next token is a '{', then we are entering a new
1012 block. Consume the entire block. */
1017 /* If we see a pragma, consume the whole thing at once. We
1018 have some safeguards against consuming pragmas willy-nilly.
1019 Normally, we'd expect to be here with parser->error set,
1020 which disables these safeguards. But it's possible to get
1021 here for secondary error recovery, after parser->error has
1023 c_parser_consume_pragma (parser
);
1024 c_parser_skip_to_pragma_eol (parser
);
1025 parser
->error
= save_error
;
1032 c_parser_consume_token (parser
);
1036 parser
->error
= false;
1039 /* CPP's options (initialized by c-opts.c). */
1040 extern cpp_options
*cpp_opts
;
1042 /* Save the warning flags which are controlled by __extension__. */
1045 disable_extension_diagnostics (void)
1048 | (warn_pointer_arith
<< 1)
1049 | (warn_traditional
<< 2)
1051 | (warn_long_long
<< 4)
1052 | (warn_cxx_compat
<< 5));
1053 cpp_opts
->cpp_pedantic
= pedantic
= 0;
1054 warn_pointer_arith
= 0;
1055 cpp_opts
->cpp_warn_traditional
= warn_traditional
= 0;
1057 cpp_opts
->cpp_warn_long_long
= warn_long_long
= 0;
1058 warn_cxx_compat
= 0;
1062 /* Restore the warning flags which are controlled by __extension__.
1063 FLAGS is the return value from disable_extension_diagnostics. */
1066 restore_extension_diagnostics (int flags
)
1068 cpp_opts
->cpp_pedantic
= pedantic
= flags
& 1;
1069 warn_pointer_arith
= (flags
>> 1) & 1;
1070 cpp_opts
->cpp_warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
1071 flag_iso
= (flags
>> 3) & 1;
1072 cpp_opts
->cpp_warn_long_long
= warn_long_long
= (flags
>> 4) & 1;
1073 warn_cxx_compat
= (flags
>> 5) & 1;
1076 /* Possibly kinds of declarator to parse. */
1077 typedef enum c_dtr_syn
{
1078 /* A normal declarator with an identifier. */
1080 /* An abstract declarator (maybe empty). */
1082 /* A parameter declarator: may be either, but after a type name does
1083 not redeclare a typedef name as an identifier if it can
1084 alternatively be interpreted as a typedef name; see DR#009,
1085 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
1086 following DR#249. For example, given a typedef T, "int T" and
1087 "int *T" are valid parameter declarations redeclaring T, while
1088 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
1089 abstract declarators rather than involving redundant parentheses;
1090 the same applies with attributes inside the parentheses before
1095 static void c_parser_external_declaration (c_parser
*);
1096 static void c_parser_asm_definition (c_parser
*);
1097 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool,
1098 bool, bool, tree
*);
1099 static void c_parser_static_assert_declaration_no_semi (c_parser
*);
1100 static void c_parser_static_assert_declaration (c_parser
*);
1101 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
1102 bool, enum c_lookahead_kind
);
1103 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
1104 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
1105 static tree
c_parser_struct_declaration (c_parser
*);
1106 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
1107 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
1109 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
1111 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
1113 struct c_declarator
*);
1114 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
1115 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
1116 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
1117 static tree
c_parser_simple_asm_expr (c_parser
*);
1118 static tree
c_parser_attributes (c_parser
*);
1119 static struct c_type_name
*c_parser_type_name (c_parser
*);
1120 static struct c_expr
c_parser_initializer (c_parser
*);
1121 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1122 static void c_parser_initelt (c_parser
*, struct obstack
*);
1123 static void c_parser_initval (c_parser
*, struct c_expr
*,
1125 static tree
c_parser_compound_statement (c_parser
*);
1126 static void c_parser_compound_statement_nostart (c_parser
*);
1127 static void c_parser_label (c_parser
*);
1128 static void c_parser_statement (c_parser
*);
1129 static void c_parser_statement_after_labels (c_parser
*);
1130 static void c_parser_if_statement (c_parser
*);
1131 static void c_parser_switch_statement (c_parser
*);
1132 static void c_parser_while_statement (c_parser
*);
1133 static void c_parser_do_statement (c_parser
*);
1134 static void c_parser_for_statement (c_parser
*);
1135 static tree
c_parser_asm_statement (c_parser
*);
1136 static tree
c_parser_asm_operands (c_parser
*, bool);
1137 static tree
c_parser_asm_goto_operands (c_parser
*);
1138 static tree
c_parser_asm_clobbers (c_parser
*);
1139 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1140 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1142 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1143 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1144 static struct c_expr
c_parser_unary_expression (c_parser
*);
1145 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1146 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1147 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1148 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1149 struct c_type_name
*,
1151 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1154 static struct c_expr
c_parser_expression (c_parser
*);
1155 static struct c_expr
c_parser_expression_conv (c_parser
*);
1156 static VEC(tree
,gc
) *c_parser_expr_list (c_parser
*, bool, bool,
1158 static void c_parser_omp_construct (c_parser
*);
1159 static void c_parser_omp_threadprivate (c_parser
*);
1160 static void c_parser_omp_barrier (c_parser
*);
1161 static void c_parser_omp_flush (c_parser
*);
1162 static void c_parser_omp_taskwait (c_parser
*);
1164 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1165 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1167 /* These Objective-C parser functions are only ever called when
1168 compiling Objective-C. */
1169 static void c_parser_objc_class_definition (c_parser
*, tree
);
1170 static void c_parser_objc_class_instance_variables (c_parser
*);
1171 static void c_parser_objc_class_declaration (c_parser
*);
1172 static void c_parser_objc_alias_declaration (c_parser
*);
1173 static void c_parser_objc_protocol_definition (c_parser
*, tree
);
1174 static bool c_parser_objc_method_type (c_parser
*);
1175 static void c_parser_objc_method_definition (c_parser
*);
1176 static void c_parser_objc_methodprotolist (c_parser
*);
1177 static void c_parser_objc_methodproto (c_parser
*);
1178 static tree
c_parser_objc_method_decl (c_parser
*, bool, tree
*);
1179 static tree
c_parser_objc_type_name (c_parser
*);
1180 static tree
c_parser_objc_protocol_refs (c_parser
*);
1181 static void c_parser_objc_try_catch_finally_statement (c_parser
*);
1182 static void c_parser_objc_synchronized_statement (c_parser
*);
1183 static tree
c_parser_objc_selector (c_parser
*);
1184 static tree
c_parser_objc_selector_arg (c_parser
*);
1185 static tree
c_parser_objc_receiver (c_parser
*);
1186 static tree
c_parser_objc_message_args (c_parser
*);
1187 static tree
c_parser_objc_keywordexpr (c_parser
*);
1188 static void c_parser_objc_at_property_declaration (c_parser
*);
1189 static void c_parser_objc_at_synthesize_declaration (c_parser
*);
1190 static void c_parser_objc_at_dynamic_declaration (c_parser
*);
1191 static bool c_parser_objc_diagnose_bad_element_prefix
1192 (c_parser
*, struct c_declspecs
*);
1194 /* Parse a translation unit (C90 6.7, C99 6.9).
1197 external-declarations
1199 external-declarations:
1200 external-declaration
1201 external-declarations external-declaration
1210 c_parser_translation_unit (c_parser
*parser
)
1212 if (c_parser_next_token_is (parser
, CPP_EOF
))
1214 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1215 "ISO C forbids an empty translation unit");
1219 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1220 mark_valid_location_for_stdc_pragma (false);
1224 c_parser_external_declaration (parser
);
1225 obstack_free (&parser_obstack
, obstack_position
);
1227 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1231 /* Parse an external declaration (C90 6.7, C99 6.9).
1233 external-declaration:
1239 external-declaration:
1242 __extension__ external-declaration
1246 external-declaration:
1247 objc-class-definition
1248 objc-class-declaration
1249 objc-alias-declaration
1250 objc-protocol-definition
1251 objc-method-definition
1256 c_parser_external_declaration (c_parser
*parser
)
1259 switch (c_parser_peek_token (parser
)->type
)
1262 switch (c_parser_peek_token (parser
)->keyword
)
1265 ext
= disable_extension_diagnostics ();
1266 c_parser_consume_token (parser
);
1267 c_parser_external_declaration (parser
);
1268 restore_extension_diagnostics (ext
);
1271 c_parser_asm_definition (parser
);
1273 case RID_AT_INTERFACE
:
1274 case RID_AT_IMPLEMENTATION
:
1275 gcc_assert (c_dialect_objc ());
1276 c_parser_objc_class_definition (parser
, NULL_TREE
);
1279 gcc_assert (c_dialect_objc ());
1280 c_parser_objc_class_declaration (parser
);
1283 gcc_assert (c_dialect_objc ());
1284 c_parser_objc_alias_declaration (parser
);
1286 case RID_AT_PROTOCOL
:
1287 gcc_assert (c_dialect_objc ());
1288 c_parser_objc_protocol_definition (parser
, NULL_TREE
);
1290 case RID_AT_PROPERTY
:
1291 gcc_assert (c_dialect_objc ());
1292 c_parser_objc_at_property_declaration (parser
);
1294 case RID_AT_SYNTHESIZE
:
1295 gcc_assert (c_dialect_objc ());
1296 c_parser_objc_at_synthesize_declaration (parser
);
1298 case RID_AT_DYNAMIC
:
1299 gcc_assert (c_dialect_objc ());
1300 c_parser_objc_at_dynamic_declaration (parser
);
1303 gcc_assert (c_dialect_objc ());
1304 c_parser_consume_token (parser
);
1305 objc_finish_implementation ();
1312 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1313 "ISO C does not allow extra %<;%> outside of a function");
1314 c_parser_consume_token (parser
);
1317 mark_valid_location_for_stdc_pragma (true);
1318 c_parser_pragma (parser
, pragma_external
);
1319 mark_valid_location_for_stdc_pragma (false);
1323 if (c_dialect_objc ())
1325 c_parser_objc_method_definition (parser
);
1328 /* Else fall through, and yield a syntax error trying to parse
1329 as a declaration or function definition. */
1332 /* A declaration or a function definition (or, in Objective-C,
1333 an @interface or @protocol with prefix attributes). We can
1334 only tell which after parsing the declaration specifiers, if
1335 any, and the first declarator. */
1336 c_parser_declaration_or_fndef (parser
, true, true, true, false, true, NULL
);
1341 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1342 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1343 accepted; otherwise (old-style parameter declarations) only other
1344 declarations are accepted. If STATIC_ASSERT_OK is true, a static
1345 assertion is accepted; otherwise (old-style parameter declarations)
1346 it is not. If NESTED is true, we are inside a function or parsing
1347 old-style parameter declarations; any functions encountered are
1348 nested functions and declaration specifiers are required; otherwise
1349 we are at top level and functions are normal functions and
1350 declaration specifiers may be optional. If EMPTY_OK is true, empty
1351 declarations are OK (subject to all other constraints); otherwise
1352 (old-style parameter declarations) they are diagnosed. If
1353 START_ATTR_OK is true, the declaration specifiers may start with
1354 attributes; otherwise they may not.
1355 OBJC_FOREACH_OBJECT_DECLARATION can be used to get back the parsed
1356 declaration when parsing an Objective-C foreach statement.
1359 declaration-specifiers init-declarator-list[opt] ;
1360 static_assert-declaration
1362 function-definition:
1363 declaration-specifiers[opt] declarator declaration-list[opt]
1368 declaration-list declaration
1370 init-declarator-list:
1372 init-declarator-list , init-declarator
1375 declarator simple-asm-expr[opt] attributes[opt]
1376 declarator simple-asm-expr[opt] attributes[opt] = initializer
1380 nested-function-definition:
1381 declaration-specifiers declarator declaration-list[opt]
1385 attributes objc-class-definition
1386 attributes objc-category-definition
1387 attributes objc-protocol-definition
1389 The simple-asm-expr and attributes are GNU extensions.
1391 This function does not handle __extension__; that is handled in its
1392 callers. ??? Following the old parser, __extension__ may start
1393 external declarations, declarations in functions and declarations
1394 at the start of "for" loops, but not old-style parameter
1397 C99 requires declaration specifiers in a function definition; the
1398 absence is diagnosed through the diagnosis of implicit int. In GNU
1399 C we also allow but diagnose declarations without declaration
1400 specifiers, but only at top level (elsewhere they conflict with
1403 In Objective-C, declarations of the looping variable in a foreach
1404 statement are exceptionally terminated by 'in' (for example, 'for
1405 (NSObject *object in array) { ... }').
1410 threadprivate-directive */
1413 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
,
1414 bool static_assert_ok
, bool empty_ok
,
1415 bool nested
, bool start_attr_ok
,
1416 tree
*objc_foreach_object_declaration
)
1418 struct c_declspecs
*specs
;
1420 tree all_prefix_attrs
;
1421 bool diagnosed_no_specs
= false;
1422 location_t here
= c_parser_peek_token (parser
)->location
;
1424 if (static_assert_ok
1425 && c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
1427 c_parser_static_assert_declaration (parser
);
1430 specs
= build_null_declspecs ();
1432 /* Try to detect an unknown type name when we have "A B" or "A *B". */
1433 if (c_parser_peek_token (parser
)->type
== CPP_NAME
1434 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
1435 && (c_parser_peek_2nd_token (parser
)->type
== CPP_NAME
1436 || c_parser_peek_2nd_token (parser
)->type
== CPP_MULT
)
1437 && (!nested
|| !lookup_name (c_parser_peek_token (parser
)->value
)))
1439 error_at (here
, "unknown type name %qE",
1440 c_parser_peek_token (parser
)->value
);
1442 /* Parse declspecs normally to get a correct pointer type, but avoid
1443 a further "fails to be a type name" error. Refuse nested functions
1444 since it is not how the user likely wants us to recover. */
1445 c_parser_peek_token (parser
)->type
= CPP_KEYWORD
;
1446 c_parser_peek_token (parser
)->keyword
= RID_VOID
;
1447 c_parser_peek_token (parser
)->value
= error_mark_node
;
1451 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
, cla_nonabstract_decl
);
1454 c_parser_skip_to_end_of_block_or_statement (parser
);
1457 if (nested
&& !specs
->declspecs_seen_p
)
1459 c_parser_error (parser
, "expected declaration specifiers");
1460 c_parser_skip_to_end_of_block_or_statement (parser
);
1463 finish_declspecs (specs
);
1464 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1470 shadow_tag_warned (specs
, 1);
1471 pedwarn (here
, 0, "empty declaration");
1473 c_parser_consume_token (parser
);
1477 /* Provide better error recovery. Note that a type name here is usually
1478 better diagnosed as a redeclaration. */
1480 && specs
->typespec_kind
== ctsk_tagdef
1481 && c_parser_next_token_starts_declspecs (parser
)
1482 && !c_parser_next_token_is (parser
, CPP_NAME
))
1484 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
1485 parser
->error
= false;
1486 shadow_tag_warned (specs
, 1);
1489 else if (c_dialect_objc ())
1491 /* Prefix attributes are an error on method decls. */
1492 switch (c_parser_peek_token (parser
)->type
)
1496 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1500 warning_at (c_parser_peek_token (parser
)->location
,
1502 "prefix attributes are ignored for methods");
1503 specs
->attrs
= NULL_TREE
;
1506 c_parser_objc_method_definition (parser
);
1508 c_parser_objc_methodproto (parser
);
1514 /* This is where we parse 'attributes @interface ...',
1515 'attributes @implementation ...', 'attributes @protocol ...'
1516 (where attributes could be, for example, __attribute__
1519 switch (c_parser_peek_token (parser
)->keyword
)
1521 case RID_AT_INTERFACE
:
1523 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1525 c_parser_objc_class_definition (parser
, specs
->attrs
);
1529 case RID_AT_IMPLEMENTATION
:
1531 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1535 warning_at (c_parser_peek_token (parser
)->location
,
1537 "prefix attributes are ignored for implementations");
1538 specs
->attrs
= NULL_TREE
;
1540 c_parser_objc_class_definition (parser
, NULL_TREE
);
1544 case RID_AT_PROTOCOL
:
1546 if (c_parser_objc_diagnose_bad_element_prefix (parser
, specs
))
1548 c_parser_objc_protocol_definition (parser
, specs
->attrs
);
1555 case RID_AT_PROPERTY
:
1558 c_parser_error (parser
,
1559 "attributes may not be specified before" );
1560 specs
->attrs
= NULL
;
1568 pending_xref_error ();
1569 prefix_attrs
= specs
->attrs
;
1570 all_prefix_attrs
= prefix_attrs
;
1571 specs
->attrs
= NULL_TREE
;
1574 struct c_declarator
*declarator
;
1577 /* Declaring either one or more declarators (in which case we
1578 should diagnose if there were no declaration specifiers) or a
1579 function definition (in which case the diagnostic for
1580 implicit int suffices). */
1581 declarator
= c_parser_declarator (parser
,
1582 specs
->typespec_kind
!= ctsk_none
,
1583 C_DTR_NORMAL
, &dummy
);
1584 if (declarator
== NULL
)
1586 c_parser_skip_to_end_of_block_or_statement (parser
);
1589 if (c_parser_next_token_is (parser
, CPP_EQ
)
1590 || c_parser_next_token_is (parser
, CPP_COMMA
)
1591 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1592 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1593 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
)
1594 || c_parser_next_token_is_keyword (parser
, RID_IN
))
1596 tree asm_name
= NULL_TREE
;
1597 tree postfix_attrs
= NULL_TREE
;
1598 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1600 diagnosed_no_specs
= true;
1601 pedwarn (here
, 0, "data definition has no type or storage class");
1603 /* Having seen a data definition, there cannot now be a
1604 function definition. */
1606 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1607 asm_name
= c_parser_simple_asm_expr (parser
);
1608 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1609 postfix_attrs
= c_parser_attributes (parser
);
1610 if (c_parser_next_token_is (parser
, CPP_EQ
))
1614 location_t init_loc
;
1615 c_parser_consume_token (parser
);
1616 /* The declaration of the variable is in effect while
1617 its initializer is parsed. */
1618 d
= start_decl (declarator
, specs
, true,
1619 chainon (postfix_attrs
, all_prefix_attrs
));
1621 d
= error_mark_node
;
1622 start_init (d
, asm_name
, global_bindings_p ());
1623 init_loc
= c_parser_peek_token (parser
)->location
;
1624 init
= c_parser_initializer (parser
);
1626 if (d
!= error_mark_node
)
1628 maybe_warn_string_init (TREE_TYPE (d
), init
);
1629 finish_decl (d
, init_loc
, init
.value
,
1630 init
.original_type
, asm_name
);
1635 tree d
= start_decl (declarator
, specs
, false,
1636 chainon (postfix_attrs
,
1639 finish_decl (d
, UNKNOWN_LOCATION
, NULL_TREE
,
1640 NULL_TREE
, asm_name
);
1642 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1645 *objc_foreach_object_declaration
= d
;
1647 *objc_foreach_object_declaration
= error_mark_node
;
1650 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1652 c_parser_consume_token (parser
);
1653 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1654 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1657 all_prefix_attrs
= prefix_attrs
;
1660 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1662 c_parser_consume_token (parser
);
1665 else if (c_parser_next_token_is_keyword (parser
, RID_IN
))
1667 /* This can only happen in Objective-C: we found the
1668 'in' that terminates the declaration inside an
1669 Objective-C foreach statement. Do not consume the
1670 token, so that the caller can use it to determine
1671 that this indeed is a foreach context. */
1676 c_parser_error (parser
, "expected %<,%> or %<;%>");
1677 c_parser_skip_to_end_of_block_or_statement (parser
);
1683 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1684 "%<asm%> or %<__attribute__%>");
1685 c_parser_skip_to_end_of_block_or_statement (parser
);
1688 /* Function definition (nested or otherwise). */
1691 pedwarn (here
, OPT_pedantic
, "ISO C forbids nested functions");
1692 c_push_function_context ();
1694 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1696 /* This can appear in many cases looking nothing like a
1697 function definition, so we don't give a more specific
1698 error suggesting there was one. */
1699 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1700 "or %<__attribute__%>");
1702 c_pop_function_context ();
1705 /* Parse old-style parameter declarations. ??? Attributes are
1706 not allowed to start declaration specifiers here because of a
1707 syntax conflict between a function declaration with attribute
1708 suffix and a function definition with an attribute prefix on
1709 first old-style parameter declaration. Following the old
1710 parser, they are not accepted on subsequent old-style
1711 parameter declarations either. However, there is no
1712 ambiguity after the first declaration, nor indeed on the
1713 first as long as we don't allow postfix attributes after a
1714 declarator with a nonempty identifier list in a definition;
1715 and postfix attributes have never been accepted here in
1716 function definitions either. */
1717 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1718 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1719 c_parser_declaration_or_fndef (parser
, false, false, false,
1721 store_parm_decls ();
1722 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1723 = c_parser_peek_token (parser
)->location
;
1724 fnbody
= c_parser_compound_statement (parser
);
1727 tree decl
= current_function_decl
;
1728 /* Mark nested functions as needing static-chain initially.
1729 lower_nested_functions will recompute it but the
1730 DECL_STATIC_CHAIN flag is also used before that happens,
1731 by initializer_constant_valid_p. See gcc.dg/nested-fn-2.c. */
1732 DECL_STATIC_CHAIN (decl
) = 1;
1735 c_pop_function_context ();
1736 add_stmt (build_stmt (DECL_SOURCE_LOCATION (decl
), DECL_EXPR
, decl
));
1747 /* Parse an asm-definition (asm() outside a function body). This is a
1755 c_parser_asm_definition (c_parser
*parser
)
1757 tree asm_str
= c_parser_simple_asm_expr (parser
);
1759 cgraph_add_asm_node (asm_str
);
1760 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1763 /* Parse a static assertion (C1X N1425 6.7.10).
1765 static_assert-declaration:
1766 static_assert-declaration-no-semi ;
1770 c_parser_static_assert_declaration (c_parser
*parser
)
1772 c_parser_static_assert_declaration_no_semi (parser
);
1774 || !c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
1775 c_parser_skip_to_end_of_block_or_statement (parser
);
1778 /* Parse a static assertion (C1X N1425 6.7.10), without the trailing
1781 static_assert-declaration-no-semi:
1782 _Static_assert ( constant-expression , string-literal )
1786 c_parser_static_assert_declaration_no_semi (c_parser
*parser
)
1788 location_t assert_loc
, value_loc
;
1792 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
));
1793 assert_loc
= c_parser_peek_token (parser
)->location
;
1797 pedwarn (assert_loc
, OPT_pedantic
,
1798 "ISO C99 does not support %<_Static_assert%>");
1800 pedwarn (assert_loc
, OPT_pedantic
,
1801 "ISO C90 does not support %<_Static_assert%>");
1803 c_parser_consume_token (parser
);
1804 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1806 value_loc
= c_parser_peek_token (parser
)->location
;
1807 value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1808 parser
->lex_untranslated_string
= true;
1809 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
1811 parser
->lex_untranslated_string
= false;
1814 switch (c_parser_peek_token (parser
)->type
)
1820 case CPP_UTF8STRING
:
1821 string
= c_parser_peek_token (parser
)->value
;
1822 c_parser_consume_token (parser
);
1823 parser
->lex_untranslated_string
= false;
1826 c_parser_error (parser
, "expected string literal");
1827 parser
->lex_untranslated_string
= false;
1830 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
1832 if (!INTEGRAL_TYPE_P (TREE_TYPE (value
)))
1834 error_at (value_loc
, "expression in static assertion is not an integer");
1837 if (TREE_CODE (value
) != INTEGER_CST
)
1839 value
= c_fully_fold (value
, false, NULL
);
1840 if (TREE_CODE (value
) == INTEGER_CST
)
1841 pedwarn (value_loc
, OPT_pedantic
, "expression in static assertion "
1842 "is not an integer constant expression");
1844 if (TREE_CODE (value
) != INTEGER_CST
)
1846 error_at (value_loc
, "expression in static assertion is not constant");
1849 constant_expression_warning (value
);
1850 if (integer_zerop (value
))
1851 error_at (assert_loc
, "static assertion failed: %E", string
);
1854 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1855 6.7), adding them to SPECS (which may already include some).
1856 Storage class specifiers are accepted iff SCSPEC_OK; type
1857 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1858 the start iff START_ATTR_OK.
1860 declaration-specifiers:
1861 storage-class-specifier declaration-specifiers[opt]
1862 type-specifier declaration-specifiers[opt]
1863 type-qualifier declaration-specifiers[opt]
1864 function-specifier declaration-specifiers[opt]
1866 Function specifiers (inline) are from C99, and are currently
1867 handled as storage class specifiers, as is __thread.
1869 C90 6.5.1, C99 6.7.1:
1870 storage-class-specifier:
1881 C90 6.5.2, C99 6.7.2:
1894 [_Imaginary removed in C99 TC2]
1895 struct-or-union-specifier
1899 (_Bool and _Complex are new in C99.)
1901 C90 6.5.3, C99 6.7.3:
1907 address-space-qualifier
1909 (restrict is new in C99.)
1913 declaration-specifiers:
1914 attributes declaration-specifiers[opt]
1920 identifier recognized by the target
1922 storage-class-specifier:
1935 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1936 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1941 class-name objc-protocol-refs[opt]
1942 typedef-name objc-protocol-refs
1947 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1948 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
,
1949 enum c_lookahead_kind la
)
1951 bool attrs_ok
= start_attr_ok
;
1952 bool seen_type
= specs
->typespec_kind
!= ctsk_none
;
1955 gcc_assert (la
== cla_prefer_id
);
1957 while (c_parser_next_token_is (parser
, CPP_NAME
)
1958 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1959 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1961 struct c_typespec t
;
1963 location_t loc
= c_parser_peek_token (parser
)->location
;
1965 /* If we cannot accept a type, exit if the next token must start
1966 one. Also, if we already have seen a tagged definition,
1967 a typename would be an error anyway and likely the user
1968 has simply forgotten a semicolon, so we exit. */
1969 if ((!typespec_ok
|| specs
->typespec_kind
== ctsk_tagdef
)
1970 && c_parser_next_tokens_start_typename (parser
, la
)
1971 && !c_parser_next_token_is_qualifier (parser
))
1974 if (c_parser_next_token_is (parser
, CPP_NAME
))
1976 tree value
= c_parser_peek_token (parser
)->value
;
1977 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1979 if (kind
== C_ID_ADDRSPACE
)
1982 = c_parser_peek_token (parser
)->keyword
- RID_FIRST_ADDR_SPACE
;
1983 declspecs_add_addrspace (specs
, as
);
1984 c_parser_consume_token (parser
);
1989 gcc_assert (!c_parser_next_token_is_qualifier (parser
));
1991 /* If we cannot accept a type, and the next token must start one,
1992 exit. Do the same if we already have seen a tagged definition,
1993 since it would be an error anyway and likely the user has simply
1994 forgotten a semicolon. */
1995 if (seen_type
|| !c_parser_next_tokens_start_typename (parser
, la
))
1998 /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
1999 a C_ID_CLASSNAME. */
2000 c_parser_consume_token (parser
);
2003 if (kind
== C_ID_ID
)
2005 error ("unknown type name %qE", value
);
2006 t
.kind
= ctsk_typedef
;
2007 t
.spec
= error_mark_node
;
2009 else if (kind
== C_ID_TYPENAME
2010 && (!c_dialect_objc ()
2011 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
2013 t
.kind
= ctsk_typedef
;
2014 /* For a typedef name, record the meaning, not the name.
2015 In case of 'foo foo, bar;'. */
2016 t
.spec
= lookup_name (value
);
2020 tree proto
= NULL_TREE
;
2021 gcc_assert (c_dialect_objc ());
2023 if (c_parser_next_token_is (parser
, CPP_LESS
))
2024 proto
= c_parser_objc_protocol_refs (parser
);
2025 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
2028 t
.expr_const_operands
= true;
2029 declspecs_add_type (loc
, specs
, t
);
2032 if (c_parser_next_token_is (parser
, CPP_LESS
))
2034 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
2035 nisse@lysator.liu.se. */
2037 gcc_assert (c_dialect_objc ());
2038 if (!typespec_ok
|| seen_type
)
2040 proto
= c_parser_objc_protocol_refs (parser
);
2042 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
2044 t
.expr_const_operands
= true;
2045 declspecs_add_type (loc
, specs
, t
);
2048 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
2049 switch (c_parser_peek_token (parser
)->keyword
)
2061 /* TODO: Distinguish between function specifiers (inline)
2062 and storage class specifiers, either here or in
2063 declspecs_add_scspec. */
2064 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
2065 c_parser_consume_token (parser
);
2089 if (c_dialect_objc ())
2090 parser
->objc_need_raw_identifier
= true;
2091 t
.kind
= ctsk_resword
;
2092 t
.spec
= c_parser_peek_token (parser
)->value
;
2094 t
.expr_const_operands
= true;
2095 declspecs_add_type (loc
, specs
, t
);
2096 c_parser_consume_token (parser
);
2103 t
= c_parser_enum_specifier (parser
);
2104 declspecs_add_type (loc
, specs
, t
);
2112 t
= c_parser_struct_or_union_specifier (parser
);
2113 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, t
.spec
);
2114 declspecs_add_type (loc
, specs
, t
);
2117 /* ??? The old parser rejected typeof after other type
2118 specifiers, but is a syntax error the best way of
2120 if (!typespec_ok
|| seen_type
)
2124 t
= c_parser_typeof_specifier (parser
);
2125 declspecs_add_type (loc
, specs
, t
);
2131 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
2132 c_parser_consume_token (parser
);
2137 attrs
= c_parser_attributes (parser
);
2138 declspecs_add_attrs (specs
, attrs
);
2147 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
2150 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
2151 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
2152 enum attributes[opt] identifier
2154 The form with trailing comma is new in C99. The forms with
2155 attributes are GNU extensions. In GNU C, we accept any expression
2156 without commas in the syntax (assignment expressions, not just
2157 conditional expressions); assignment expressions will be diagnosed
2162 enumerator-list , enumerator
2165 enumeration-constant
2166 enumeration-constant = constant-expression
2169 static struct c_typespec
2170 c_parser_enum_specifier (c_parser
*parser
)
2172 struct c_typespec ret
;
2174 tree ident
= NULL_TREE
;
2175 location_t enum_loc
;
2176 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2177 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
2178 enum_loc
= c_parser_peek_token (parser
)->location
;
2179 c_parser_consume_token (parser
);
2180 attrs
= c_parser_attributes (parser
);
2181 enum_loc
= c_parser_peek_token (parser
)->location
;
2182 /* Set the location in case we create a decl now. */
2183 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2184 if (c_parser_next_token_is (parser
, CPP_NAME
))
2186 ident
= c_parser_peek_token (parser
)->value
;
2187 ident_loc
= c_parser_peek_token (parser
)->location
;
2188 enum_loc
= ident_loc
;
2189 c_parser_consume_token (parser
);
2191 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2193 /* Parse an enum definition. */
2194 struct c_enum_contents the_enum
;
2195 tree type
= start_enum (enum_loc
, &the_enum
, ident
);
2197 /* We chain the enumerators in reverse order, then put them in
2198 forward order at the end. */
2199 tree values
= NULL_TREE
;
2200 c_parser_consume_token (parser
);
2208 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
2209 location_t decl_loc
, value_loc
;
2210 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
2212 c_parser_error (parser
, "expected identifier");
2213 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2214 values
= error_mark_node
;
2217 token
= c_parser_peek_token (parser
);
2218 enum_id
= token
->value
;
2219 /* Set the location in case we create a decl now. */
2220 c_parser_set_source_position_from_token (token
);
2221 decl_loc
= value_loc
= token
->location
;
2222 c_parser_consume_token (parser
);
2223 if (c_parser_next_token_is (parser
, CPP_EQ
))
2225 c_parser_consume_token (parser
);
2226 value_loc
= c_parser_peek_token (parser
)->location
;
2227 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
2230 enum_value
= NULL_TREE
;
2231 enum_decl
= build_enumerator (decl_loc
, value_loc
,
2232 &the_enum
, enum_id
, enum_value
);
2233 TREE_CHAIN (enum_decl
) = values
;
2236 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2238 comma_loc
= c_parser_peek_token (parser
)->location
;
2240 c_parser_consume_token (parser
);
2242 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2244 if (seen_comma
&& !flag_isoc99
)
2245 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
2246 c_parser_consume_token (parser
);
2251 c_parser_error (parser
, "expected %<,%> or %<}%>");
2252 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2253 values
= error_mark_node
;
2257 postfix_attrs
= c_parser_attributes (parser
);
2258 ret
.spec
= finish_enum (type
, nreverse (values
),
2259 chainon (attrs
, postfix_attrs
));
2260 ret
.kind
= ctsk_tagdef
;
2261 ret
.expr
= NULL_TREE
;
2262 ret
.expr_const_operands
= true;
2267 c_parser_error (parser
, "expected %<{%>");
2268 ret
.spec
= error_mark_node
;
2269 ret
.kind
= ctsk_tagref
;
2270 ret
.expr
= NULL_TREE
;
2271 ret
.expr_const_operands
= true;
2274 ret
= parser_xref_tag (ident_loc
, ENUMERAL_TYPE
, ident
);
2275 /* In ISO C, enumerated types can be referred to only if already
2277 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
2280 pedwarn (enum_loc
, OPT_pedantic
,
2281 "ISO C forbids forward references to %<enum%> types");
2286 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
2288 struct-or-union-specifier:
2289 struct-or-union attributes[opt] identifier[opt]
2290 { struct-contents } attributes[opt]
2291 struct-or-union attributes[opt] identifier
2294 struct-declaration-list
2296 struct-declaration-list:
2297 struct-declaration ;
2298 struct-declaration-list struct-declaration ;
2305 struct-declaration-list struct-declaration
2307 struct-declaration-list:
2308 struct-declaration-list ;
2311 (Note that in the syntax here, unlike that in ISO C, the semicolons
2312 are included here rather than in struct-declaration, in order to
2313 describe the syntax with extra semicolons and missing semicolon at
2318 struct-declaration-list:
2319 @defs ( class-name )
2321 (Note this does not include a trailing semicolon, but can be
2322 followed by further declarations, and gets a pedwarn-if-pedantic
2323 when followed by a semicolon.) */
2325 static struct c_typespec
2326 c_parser_struct_or_union_specifier (c_parser
*parser
)
2328 struct c_typespec ret
;
2330 tree ident
= NULL_TREE
;
2331 location_t struct_loc
;
2332 location_t ident_loc
= UNKNOWN_LOCATION
;
2333 enum tree_code code
;
2334 switch (c_parser_peek_token (parser
)->keyword
)
2345 struct_loc
= c_parser_peek_token (parser
)->location
;
2346 c_parser_consume_token (parser
);
2347 attrs
= c_parser_attributes (parser
);
2349 /* Set the location in case we create a decl now. */
2350 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
2352 if (c_parser_next_token_is (parser
, CPP_NAME
))
2354 ident
= c_parser_peek_token (parser
)->value
;
2355 ident_loc
= c_parser_peek_token (parser
)->location
;
2356 struct_loc
= ident_loc
;
2357 c_parser_consume_token (parser
);
2359 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2361 /* Parse a struct or union definition. Start the scope of the
2362 tag before parsing components. */
2363 struct c_struct_parse_info
*struct_info
;
2364 tree type
= start_struct (struct_loc
, code
, ident
, &struct_info
);
2366 /* We chain the components in reverse order, then put them in
2367 forward order at the end. Each struct-declaration may
2368 declare multiple components (comma-separated), so we must use
2369 chainon to join them, although when parsing each
2370 struct-declaration we can use TREE_CHAIN directly.
2372 The theory behind all this is that there will be more
2373 semicolon separated fields than comma separated fields, and
2374 so we'll be minimizing the number of node traversals required
2376 tree contents
= NULL_TREE
;
2377 c_parser_consume_token (parser
);
2378 /* Handle the Objective-C @defs construct,
2379 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
2380 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
2383 gcc_assert (c_dialect_objc ());
2384 c_parser_consume_token (parser
);
2385 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2387 if (c_parser_next_token_is (parser
, CPP_NAME
)
2388 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
2390 name
= c_parser_peek_token (parser
)->value
;
2391 c_parser_consume_token (parser
);
2395 c_parser_error (parser
, "expected class name");
2396 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2399 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2401 contents
= nreverse (objc_get_class_ivars (name
));
2404 /* Parse the struct-declarations and semicolons. Problems with
2405 semicolons are diagnosed here; empty structures are diagnosed
2410 /* Parse any stray semicolon. */
2411 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2413 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
2414 "extra semicolon in struct or union specified");
2415 c_parser_consume_token (parser
);
2418 /* Stop if at the end of the struct or union contents. */
2419 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2421 c_parser_consume_token (parser
);
2424 /* Accept #pragmas at struct scope. */
2425 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
2427 c_parser_pragma (parser
, pragma_external
);
2430 /* Parse some comma-separated declarations, but not the
2431 trailing semicolon if any. */
2432 decls
= c_parser_struct_declaration (parser
);
2433 contents
= chainon (decls
, contents
);
2434 /* If no semicolon follows, either we have a parse error or
2435 are at the end of the struct or union and should
2437 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2438 c_parser_consume_token (parser
);
2441 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2442 pedwarn (c_parser_peek_token (parser
)->location
, 0,
2443 "no semicolon at end of struct or union");
2444 else if (parser
->error
2445 || !c_parser_next_token_starts_declspecs (parser
))
2447 c_parser_error (parser
, "expected %<;%>");
2448 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
2452 /* If we come here, we have already emitted an error
2453 for an expected `;', identifier or `(', and we also
2454 recovered already. Go on with the next field. */
2457 postfix_attrs
= c_parser_attributes (parser
);
2458 ret
.spec
= finish_struct (struct_loc
, type
, nreverse (contents
),
2459 chainon (attrs
, postfix_attrs
), struct_info
);
2460 ret
.kind
= ctsk_tagdef
;
2461 ret
.expr
= NULL_TREE
;
2462 ret
.expr_const_operands
= true;
2467 c_parser_error (parser
, "expected %<{%>");
2468 ret
.spec
= error_mark_node
;
2469 ret
.kind
= ctsk_tagref
;
2470 ret
.expr
= NULL_TREE
;
2471 ret
.expr_const_operands
= true;
2474 ret
= parser_xref_tag (ident_loc
, code
, ident
);
2478 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
2479 the trailing semicolon.
2482 specifier-qualifier-list struct-declarator-list
2483 static_assert-declaration-no-semi
2485 specifier-qualifier-list:
2486 type-specifier specifier-qualifier-list[opt]
2487 type-qualifier specifier-qualifier-list[opt]
2488 attributes specifier-qualifier-list[opt]
2490 struct-declarator-list:
2492 struct-declarator-list , attributes[opt] struct-declarator
2495 declarator attributes[opt]
2496 declarator[opt] : constant-expression attributes[opt]
2501 __extension__ struct-declaration
2502 specifier-qualifier-list
2504 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
2505 of attributes where shown is a GNU extension. In GNU C, we accept
2506 any expression without commas in the syntax (assignment
2507 expressions, not just conditional expressions); assignment
2508 expressions will be diagnosed as non-constant. */
2511 c_parser_struct_declaration (c_parser
*parser
)
2513 struct c_declspecs
*specs
;
2515 tree all_prefix_attrs
;
2517 location_t decl_loc
;
2518 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2522 ext
= disable_extension_diagnostics ();
2523 c_parser_consume_token (parser
);
2524 decl
= c_parser_struct_declaration (parser
);
2525 restore_extension_diagnostics (ext
);
2528 if (c_parser_next_token_is_keyword (parser
, RID_STATIC_ASSERT
))
2530 c_parser_static_assert_declaration_no_semi (parser
);
2533 specs
= build_null_declspecs ();
2534 decl_loc
= c_parser_peek_token (parser
)->location
;
2535 c_parser_declspecs (parser
, specs
, false, true, true, cla_nonabstract_decl
);
2538 if (!specs
->declspecs_seen_p
)
2540 c_parser_error (parser
, "expected specifier-qualifier-list");
2543 finish_declspecs (specs
);
2544 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2545 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2548 if (specs
->typespec_kind
== ctsk_none
)
2550 pedwarn (decl_loc
, OPT_pedantic
,
2551 "ISO C forbids member declarations with no members");
2552 shadow_tag_warned (specs
, pedantic
);
2557 /* Support for unnamed structs or unions as members of
2558 structs or unions (which is [a] useful and [b] supports
2562 ret
= grokfield (c_parser_peek_token (parser
)->location
,
2563 build_id_declarator (NULL_TREE
), specs
,
2566 decl_attributes (&ret
, attrs
, 0);
2571 /* Provide better error recovery. Note that a type name here is valid,
2572 and will be treated as a field name. */
2573 if (specs
->typespec_kind
== ctsk_tagdef
2574 && TREE_CODE (specs
->type
) != ENUMERAL_TYPE
2575 && c_parser_next_token_starts_declspecs (parser
)
2576 && !c_parser_next_token_is (parser
, CPP_NAME
))
2578 c_parser_error (parser
, "expected %<;%>, identifier or %<(%>");
2579 parser
->error
= false;
2583 pending_xref_error ();
2584 prefix_attrs
= specs
->attrs
;
2585 all_prefix_attrs
= prefix_attrs
;
2586 specs
->attrs
= NULL_TREE
;
2590 /* Declaring one or more declarators or un-named bit-fields. */
2591 struct c_declarator
*declarator
;
2593 if (c_parser_next_token_is (parser
, CPP_COLON
))
2594 declarator
= build_id_declarator (NULL_TREE
);
2596 declarator
= c_parser_declarator (parser
,
2597 specs
->typespec_kind
!= ctsk_none
,
2598 C_DTR_NORMAL
, &dummy
);
2599 if (declarator
== NULL
)
2601 c_parser_skip_to_end_of_block_or_statement (parser
);
2604 if (c_parser_next_token_is (parser
, CPP_COLON
)
2605 || c_parser_next_token_is (parser
, CPP_COMMA
)
2606 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2607 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2608 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2610 tree postfix_attrs
= NULL_TREE
;
2611 tree width
= NULL_TREE
;
2613 if (c_parser_next_token_is (parser
, CPP_COLON
))
2615 c_parser_consume_token (parser
);
2616 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2618 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2619 postfix_attrs
= c_parser_attributes (parser
);
2620 d
= grokfield (c_parser_peek_token (parser
)->location
,
2621 declarator
, specs
, width
, &all_prefix_attrs
);
2622 decl_attributes (&d
, chainon (postfix_attrs
,
2623 all_prefix_attrs
), 0);
2624 DECL_CHAIN (d
) = decls
;
2626 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2627 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2630 all_prefix_attrs
= prefix_attrs
;
2631 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2632 c_parser_consume_token (parser
);
2633 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2634 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2636 /* Semicolon consumed in caller. */
2641 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2647 c_parser_error (parser
,
2648 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2649 "%<__attribute__%>");
2656 /* Parse a typeof specifier (a GNU extension).
2659 typeof ( expression )
2660 typeof ( type-name )
2663 static struct c_typespec
2664 c_parser_typeof_specifier (c_parser
*parser
)
2666 struct c_typespec ret
;
2667 ret
.kind
= ctsk_typeof
;
2668 ret
.spec
= error_mark_node
;
2669 ret
.expr
= NULL_TREE
;
2670 ret
.expr_const_operands
= true;
2671 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2672 c_parser_consume_token (parser
);
2673 c_inhibit_evaluation_warnings
++;
2675 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2677 c_inhibit_evaluation_warnings
--;
2681 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_id
))
2683 struct c_type_name
*type
= c_parser_type_name (parser
);
2684 c_inhibit_evaluation_warnings
--;
2688 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2689 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2695 location_t here
= c_parser_peek_token (parser
)->location
;
2696 struct c_expr expr
= c_parser_expression (parser
);
2697 c_inhibit_evaluation_warnings
--;
2699 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2700 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2701 error_at (here
, "%<typeof%> applied to a bit-field");
2702 mark_exp_read (expr
.value
);
2703 ret
.spec
= TREE_TYPE (expr
.value
);
2704 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2705 /* This is returned with the type so that when the type is
2706 evaluated, this can be evaluated. */
2708 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2709 pop_maybe_used (was_vm
);
2711 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2715 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2716 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2717 be redeclared; otherwise it may not. KIND indicates which kind of
2718 declarator is wanted. Returns a valid declarator except in the
2719 case of a syntax error in which case NULL is returned. *SEEN_ID is
2720 set to true if an identifier being declared is seen; this is used
2721 to diagnose bad forms of abstract array declarators and to
2722 determine whether an identifier list is syntactically permitted.
2725 pointer[opt] direct-declarator
2729 ( attributes[opt] declarator )
2730 direct-declarator array-declarator
2731 direct-declarator ( parameter-type-list )
2732 direct-declarator ( identifier-list[opt] )
2735 * type-qualifier-list[opt]
2736 * type-qualifier-list[opt] pointer
2738 type-qualifier-list:
2741 type-qualifier-list type-qualifier
2742 type-qualifier-list attributes
2744 parameter-type-list:
2746 parameter-list , ...
2749 parameter-declaration
2750 parameter-list , parameter-declaration
2752 parameter-declaration:
2753 declaration-specifiers declarator attributes[opt]
2754 declaration-specifiers abstract-declarator[opt] attributes[opt]
2758 identifier-list , identifier
2760 abstract-declarator:
2762 pointer[opt] direct-abstract-declarator
2764 direct-abstract-declarator:
2765 ( attributes[opt] abstract-declarator )
2766 direct-abstract-declarator[opt] array-declarator
2767 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2772 direct-declarator ( parameter-forward-declarations
2773 parameter-type-list[opt] )
2775 direct-abstract-declarator:
2776 direct-abstract-declarator[opt] ( parameter-forward-declarations
2777 parameter-type-list[opt] )
2779 parameter-forward-declarations:
2781 parameter-forward-declarations parameter-list ;
2783 The uses of attributes shown above are GNU extensions.
2785 Some forms of array declarator are not included in C99 in the
2786 syntax for abstract declarators; these are disallowed elsewhere.
2787 This may be a defect (DR#289).
2789 This function also accepts an omitted abstract declarator as being
2790 an abstract declarator, although not part of the formal syntax. */
2792 static struct c_declarator
*
2793 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2796 /* Parse any initial pointer part. */
2797 if (c_parser_next_token_is (parser
, CPP_MULT
))
2799 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2800 struct c_declarator
*inner
;
2801 c_parser_consume_token (parser
);
2802 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2803 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2807 return make_pointer_declarator (quals_attrs
, inner
);
2809 /* Now we have a direct declarator, direct abstract declarator or
2810 nothing (which counts as a direct abstract declarator here). */
2811 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2814 /* Parse a direct declarator or direct abstract declarator; arguments
2815 as c_parser_declarator. */
2817 static struct c_declarator
*
2818 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2821 /* The direct declarator must start with an identifier (possibly
2822 omitted) or a parenthesized declarator (possibly abstract). In
2823 an ordinary declarator, initial parentheses must start a
2824 parenthesized declarator. In an abstract declarator or parameter
2825 declarator, they could start a parenthesized declarator or a
2826 parameter list. To tell which, the open parenthesis and any
2827 following attributes must be read. If a declaration specifier
2828 follows, then it is a parameter list; if the specifier is a
2829 typedef name, there might be an ambiguity about redeclaring it,
2830 which is resolved in the direction of treating it as a typedef
2831 name. If a close parenthesis follows, it is also an empty
2832 parameter list, as the syntax does not permit empty abstract
2833 declarators. Otherwise, it is a parenthesized declarator (in
2834 which case the analysis may be repeated inside it, recursively).
2836 ??? There is an ambiguity in a parameter declaration "int
2837 (__attribute__((foo)) x)", where x is not a typedef name: it
2838 could be an abstract declarator for a function, or declare x with
2839 parentheses. The proper resolution of this ambiguity needs
2840 documenting. At present we follow an accident of the old
2841 parser's implementation, whereby the first parameter must have
2842 some declaration specifiers other than just attributes. Thus as
2843 a parameter declaration it is treated as a parenthesized
2844 parameter named x, and as an abstract declarator it is
2847 ??? Also following the old parser, attributes inside an empty
2848 parameter list are ignored, making it a list not yielding a
2849 prototype, rather than giving an error or making it have one
2850 parameter with implicit type int.
2852 ??? Also following the old parser, typedef names may be
2853 redeclared in declarators, but not Objective-C class names. */
2855 if (kind
!= C_DTR_ABSTRACT
2856 && c_parser_next_token_is (parser
, CPP_NAME
)
2858 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
2859 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
2860 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2862 struct c_declarator
*inner
2863 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2865 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2866 c_parser_consume_token (parser
);
2867 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2870 if (kind
!= C_DTR_NORMAL
2871 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2873 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2874 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2877 /* Either we are at the end of an abstract declarator, or we have
2880 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2883 struct c_declarator
*inner
;
2884 c_parser_consume_token (parser
);
2885 attrs
= c_parser_attributes (parser
);
2886 if (kind
!= C_DTR_NORMAL
2887 && (c_parser_next_token_starts_declspecs (parser
)
2888 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2890 struct c_arg_info
*args
2891 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2898 = build_function_declarator (args
,
2899 build_id_declarator (NULL_TREE
));
2900 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2904 /* A parenthesized declarator. */
2905 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2906 if (inner
!= NULL
&& attrs
!= NULL
)
2907 inner
= build_attrs_declarator (attrs
, inner
);
2908 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2910 c_parser_consume_token (parser
);
2914 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2918 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2925 if (kind
== C_DTR_NORMAL
)
2927 c_parser_error (parser
, "expected identifier or %<(%>");
2931 return build_id_declarator (NULL_TREE
);
2935 /* Parse part of a direct declarator or direct abstract declarator,
2936 given that some (in INNER) has already been parsed; ID_PRESENT is
2937 true if an identifier is present, false for an abstract
2940 static struct c_declarator
*
2941 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2942 struct c_declarator
*inner
)
2944 /* Parse a sequence of array declarators and parameter lists. */
2945 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2947 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
2948 struct c_declarator
*declarator
;
2949 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2953 c_parser_consume_token (parser
);
2954 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2955 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2957 c_parser_consume_token (parser
);
2958 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2959 c_parser_declspecs (parser
, quals_attrs
, false, false, true, cla_prefer_id
);
2960 if (!quals_attrs
->declspecs_seen_p
)
2962 /* If "static" is present, there must be an array dimension.
2963 Otherwise, there may be a dimension, "*", or no
2968 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2972 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2977 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2979 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2983 c_parser_consume_token (parser
);
2988 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2994 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2997 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2998 c_parser_consume_token (parser
);
3001 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3006 mark_exp_read (dimen
);
3007 declarator
= build_array_declarator (brace_loc
, dimen
, quals_attrs
,
3008 static_seen
, star_seen
);
3009 if (declarator
== NULL
)
3011 inner
= set_array_declarator_inner (declarator
, inner
);
3012 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3014 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
3017 struct c_arg_info
*args
;
3018 c_parser_consume_token (parser
);
3019 attrs
= c_parser_attributes (parser
);
3020 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
3025 inner
= build_function_declarator (args
, inner
);
3026 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
3032 /* Parse a parameter list or identifier list, including the closing
3033 parenthesis but not the opening one. ATTRS are the attributes at
3034 the start of the list. ID_LIST_OK is true if an identifier list is
3035 acceptable; such a list must not have attributes at the start. */
3037 static struct c_arg_info
*
3038 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
3041 declare_parm_level ();
3042 /* If the list starts with an identifier, it is an identifier list.
3043 Otherwise, it is either a prototype list or an empty list. */
3046 && c_parser_next_token_is (parser
, CPP_NAME
)
3047 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
3049 /* Look ahead to detect typos in type names. */
3050 && c_parser_peek_2nd_token (parser
)->type
!= CPP_NAME
3051 && c_parser_peek_2nd_token (parser
)->type
!= CPP_MULT
3052 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_PAREN
3053 && c_parser_peek_2nd_token (parser
)->type
!= CPP_OPEN_SQUARE
)
3055 tree list
= NULL_TREE
, *nextp
= &list
;
3056 while (c_parser_next_token_is (parser
, CPP_NAME
)
3057 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
3059 *nextp
= build_tree_list (NULL_TREE
,
3060 c_parser_peek_token (parser
)->value
);
3061 nextp
= & TREE_CHAIN (*nextp
);
3062 c_parser_consume_token (parser
);
3063 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
3065 c_parser_consume_token (parser
);
3066 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3068 c_parser_error (parser
, "expected identifier");
3072 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3074 struct c_arg_info
*ret
= build_arg_info ();
3076 c_parser_consume_token (parser
);
3082 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3090 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
3096 /* Parse a parameter list (possibly empty), including the closing
3097 parenthesis but not the opening one. ATTRS are the attributes at
3098 the start of the list. */
3100 static struct c_arg_info
*
3101 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
3103 bool bad_parm
= false;
3104 /* ??? Following the old parser, forward parameter declarations may
3105 use abstract declarators, and if no real parameter declarations
3106 follow the forward declarations then this is not diagnosed. Also
3107 note as above that attributes are ignored as the only contents of
3108 the parentheses, or as the only contents after forward
3110 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3112 struct c_arg_info
*ret
= build_arg_info ();
3113 c_parser_consume_token (parser
);
3116 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3118 struct c_arg_info
*ret
= build_arg_info ();
3119 /* Suppress -Wold-style-definition for this case. */
3120 ret
->types
= error_mark_node
;
3121 error_at (c_parser_peek_token (parser
)->location
,
3122 "ISO C requires a named argument before %<...%>");
3123 c_parser_consume_token (parser
);
3124 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3126 c_parser_consume_token (parser
);
3131 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3136 /* Nonempty list of parameters, either terminated with semicolon
3137 (forward declarations; recurse) or with close parenthesis (normal
3138 function) or with ", ... )" (variadic function). */
3141 /* Parse a parameter. */
3142 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
3147 push_parm_decl (parm
);
3148 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3151 c_parser_consume_token (parser
);
3152 mark_forward_parm_decls ();
3153 new_attrs
= c_parser_attributes (parser
);
3154 return c_parser_parms_list_declarator (parser
, new_attrs
);
3156 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3158 c_parser_consume_token (parser
);
3161 get_pending_sizes ();
3165 return get_parm_info (false);
3167 if (!c_parser_require (parser
, CPP_COMMA
,
3168 "expected %<;%>, %<,%> or %<)%>"))
3170 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
3171 get_pending_sizes ();
3174 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3176 c_parser_consume_token (parser
);
3177 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
3179 c_parser_consume_token (parser
);
3182 get_pending_sizes ();
3186 return get_parm_info (true);
3190 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
3192 get_pending_sizes ();
3199 /* Parse a parameter declaration. ATTRS are the attributes at the
3200 start of the declaration if it is the first parameter. */
3202 static struct c_parm
*
3203 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
3205 struct c_declspecs
*specs
;
3206 struct c_declarator
*declarator
;
3208 tree postfix_attrs
= NULL_TREE
;
3210 if (!c_parser_next_token_starts_declspecs (parser
))
3212 c_token
*token
= c_parser_peek_token (parser
);
3215 c_parser_set_source_position_from_token (token
);
3216 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
3218 error ("unknown type name %qE", token
->value
);
3219 parser
->error
= true;
3221 /* ??? In some Objective-C cases '...' isn't applicable so there
3222 should be a different message. */
3224 c_parser_error (parser
,
3225 "expected declaration specifiers or %<...%>");
3226 c_parser_skip_to_end_of_parameter (parser
);
3229 specs
= build_null_declspecs ();
3232 declspecs_add_attrs (specs
, attrs
);
3235 c_parser_declspecs (parser
, specs
, true, true, true, cla_nonabstract_decl
);
3236 finish_declspecs (specs
);
3237 pending_xref_error ();
3238 prefix_attrs
= specs
->attrs
;
3239 specs
->attrs
= NULL_TREE
;
3240 declarator
= c_parser_declarator (parser
,
3241 specs
->typespec_kind
!= ctsk_none
,
3242 C_DTR_PARM
, &dummy
);
3243 if (declarator
== NULL
)
3245 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3248 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
3249 postfix_attrs
= c_parser_attributes (parser
);
3250 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
3254 /* Parse a string literal in an asm expression. It should not be
3255 translated, and wide string literals are an error although
3256 permitted by the syntax. This is a GNU extension.
3261 ??? At present, following the old parser, the caller needs to have
3262 set lex_untranslated_string to 1. It would be better to follow the
3263 C++ parser rather than using this kludge. */
3266 c_parser_asm_string_literal (c_parser
*parser
)
3269 if (c_parser_next_token_is (parser
, CPP_STRING
))
3271 str
= c_parser_peek_token (parser
)->value
;
3272 c_parser_consume_token (parser
);
3274 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
3276 error_at (c_parser_peek_token (parser
)->location
,
3277 "wide string literal in %<asm%>");
3278 str
= build_string (1, "");
3279 c_parser_consume_token (parser
);
3283 c_parser_error (parser
, "expected string literal");
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
, collection_expression
;
4768 location_t loc
= c_parser_peek_token (parser
)->location
;
4769 location_t for_loc
= c_parser_peek_token (parser
)->location
;
4770 bool is_foreach_statement
= false;
4771 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4772 c_parser_consume_token (parser
);
4773 /* Open a compound statement in Objective-C as well, just in case this is
4774 as foreach expression. */
4775 block
= c_begin_compound_stmt (flag_isoc99
|| c_dialect_objc ());
4776 cond
= error_mark_node
;
4777 incr
= error_mark_node
;
4778 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4780 /* Parse the initialization declaration or expression. */
4781 object_expression
= error_mark_node
;
4782 parser
->objc_could_be_foreach_context
= c_dialect_objc ();
4783 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4785 parser
->objc_could_be_foreach_context
= false;
4786 c_parser_consume_token (parser
);
4787 c_finish_expr_stmt (loc
, NULL_TREE
);
4789 else if (c_parser_next_tokens_start_declaration (parser
))
4791 c_parser_declaration_or_fndef (parser
, true, true, true, true, true,
4792 &object_expression
);
4793 parser
->objc_could_be_foreach_context
= false;
4795 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4797 c_parser_consume_token (parser
);
4798 is_foreach_statement
= true;
4799 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4800 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4803 check_for_loop_decls (for_loc
, flag_isoc99
);
4805 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4807 /* __extension__ can start a declaration, but is also an
4808 unary operator that can start an expression. Consume all
4809 but the last of a possible series of __extension__ to
4811 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4812 && (c_parser_peek_2nd_token (parser
)->keyword
4814 c_parser_consume_token (parser
);
4815 if (c_token_starts_declaration (c_parser_peek_2nd_token (parser
)))
4818 ext
= disable_extension_diagnostics ();
4819 c_parser_consume_token (parser
);
4820 c_parser_declaration_or_fndef (parser
, true, true, true, true,
4821 true, &object_expression
);
4822 parser
->objc_could_be_foreach_context
= false;
4824 restore_extension_diagnostics (ext
);
4825 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4827 c_parser_consume_token (parser
);
4828 is_foreach_statement
= true;
4829 if (check_for_loop_decls (for_loc
, true) == NULL_TREE
)
4830 c_parser_error (parser
, "multiple iterating variables in fast enumeration");
4833 check_for_loop_decls (for_loc
, flag_isoc99
);
4842 tree init_expression
;
4843 init_expression
= c_parser_expression (parser
).value
;
4844 parser
->objc_could_be_foreach_context
= false;
4845 if (c_parser_next_token_is_keyword (parser
, RID_IN
))
4847 c_parser_consume_token (parser
);
4848 is_foreach_statement
= true;
4849 if (! lvalue_p (init_expression
))
4850 c_parser_error (parser
, "invalid iterating variable in fast enumeration");
4851 object_expression
= c_fully_fold (init_expression
, false, NULL
);
4855 c_finish_expr_stmt (loc
, init_expression
);
4856 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4860 /* Parse the loop condition. In the case of a foreach
4861 statement, there is no loop condition. */
4862 gcc_assert (!parser
->objc_could_be_foreach_context
);
4863 if (!is_foreach_statement
)
4865 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4867 c_parser_consume_token (parser
);
4872 cond
= c_parser_condition (parser
);
4873 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4876 /* Parse the increment expression (the third expression in a
4877 for-statement). In the case of a foreach-statement, this is
4878 the expression that follows the 'in'. */
4879 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4881 if (is_foreach_statement
)
4883 c_parser_error (parser
, "missing collection in fast enumeration");
4884 collection_expression
= error_mark_node
;
4887 incr
= c_process_expr_stmt (loc
, NULL_TREE
);
4891 if (is_foreach_statement
)
4892 collection_expression
= c_fully_fold (c_parser_expression (parser
).value
,
4895 incr
= c_process_expr_stmt (loc
, c_parser_expression (parser
).value
);
4897 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4899 save_break
= c_break_label
;
4900 c_break_label
= NULL_TREE
;
4901 save_cont
= c_cont_label
;
4902 c_cont_label
= NULL_TREE
;
4903 body
= c_parser_c99_block_statement (parser
);
4904 if (is_foreach_statement
)
4905 objc_finish_foreach_loop (loc
, object_expression
, collection_expression
, body
, c_break_label
, c_cont_label
);
4907 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4908 add_stmt (c_end_compound_stmt (loc
, block
, flag_isoc99
|| c_dialect_objc ()));
4909 c_break_label
= save_break
;
4910 c_cont_label
= save_cont
;
4913 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4914 statement with inputs, outputs, clobbers, and volatile tag
4918 asm type-qualifier[opt] ( asm-argument ) ;
4919 asm type-qualifier[opt] goto ( asm-goto-argument ) ;
4923 asm-string-literal : asm-operands[opt]
4924 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4925 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
4928 asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
4931 Qualifiers other than volatile are accepted in the syntax but
4935 c_parser_asm_statement (c_parser
*parser
)
4937 tree quals
, str
, outputs
, inputs
, clobbers
, labels
, ret
;
4938 bool simple
, is_goto
;
4939 location_t asm_loc
= c_parser_peek_token (parser
)->location
;
4940 int section
, nsections
;
4942 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4943 c_parser_consume_token (parser
);
4944 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4946 quals
= c_parser_peek_token (parser
)->value
;
4947 c_parser_consume_token (parser
);
4949 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4950 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4952 warning_at (c_parser_peek_token (parser
)->location
,
4954 "%E qualifier ignored on asm",
4955 c_parser_peek_token (parser
)->value
);
4957 c_parser_consume_token (parser
);
4963 if (c_parser_next_token_is_keyword (parser
, RID_GOTO
))
4965 c_parser_consume_token (parser
);
4969 /* ??? Follow the C++ parser rather than using the
4970 lex_untranslated_string kludge. */
4971 parser
->lex_untranslated_string
= true;
4974 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4977 str
= c_parser_asm_string_literal (parser
);
4978 if (str
== NULL_TREE
)
4979 goto error_close_paren
;
4982 outputs
= NULL_TREE
;
4984 clobbers
= NULL_TREE
;
4987 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
4990 /* Parse each colon-delimited section of operands. */
4991 nsections
= 3 + is_goto
;
4992 for (section
= 0; section
< nsections
; ++section
)
4994 if (!c_parser_require (parser
, CPP_COLON
,
4997 : "expected %<:%> or %<)%>"))
4998 goto error_close_paren
;
5000 /* Once past any colon, we're no longer a simple asm. */
5003 if ((!c_parser_next_token_is (parser
, CPP_COLON
)
5004 && !c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5009 /* For asm goto, we don't allow output operands, but reserve
5010 the slot for a future extension that does allow them. */
5012 outputs
= c_parser_asm_operands (parser
, false);
5015 inputs
= c_parser_asm_operands (parser
, true);
5018 clobbers
= c_parser_asm_clobbers (parser
);
5021 labels
= c_parser_asm_goto_operands (parser
);
5027 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
) && !is_goto
)
5032 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5034 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5038 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
5039 c_parser_skip_to_end_of_block_or_statement (parser
);
5041 ret
= build_asm_stmt (quals
, build_asm_expr (asm_loc
, str
, outputs
, inputs
,
5042 clobbers
, labels
, simple
));
5045 parser
->lex_untranslated_string
= false;
5049 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5053 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
5054 not outputs), apply the default conversion of functions and arrays
5059 asm-operands , asm-operand
5062 asm-string-literal ( expression )
5063 [ identifier ] asm-string-literal ( expression )
5067 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
5069 tree list
= NULL_TREE
;
5075 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
5077 c_parser_consume_token (parser
);
5078 if (c_parser_next_token_is (parser
, CPP_NAME
))
5080 tree id
= c_parser_peek_token (parser
)->value
;
5081 c_parser_consume_token (parser
);
5082 name
= build_string (IDENTIFIER_LENGTH (id
),
5083 IDENTIFIER_POINTER (id
));
5087 c_parser_error (parser
, "expected identifier");
5088 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
5091 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5096 str
= c_parser_asm_string_literal (parser
);
5097 if (str
== NULL_TREE
)
5099 parser
->lex_untranslated_string
= false;
5100 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5102 parser
->lex_untranslated_string
= true;
5105 loc
= c_parser_peek_token (parser
)->location
;
5106 expr
= c_parser_expression (parser
);
5107 mark_exp_read (expr
.value
);
5109 expr
= default_function_array_conversion (loc
, expr
);
5110 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5111 parser
->lex_untranslated_string
= true;
5112 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
5114 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5117 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
5119 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5120 c_parser_consume_token (parser
);
5127 /* Parse asm clobbers, a GNU extension.
5131 asm-clobbers , asm-string-literal
5135 c_parser_asm_clobbers (c_parser
*parser
)
5137 tree list
= NULL_TREE
;
5140 tree str
= c_parser_asm_string_literal (parser
);
5142 list
= tree_cons (NULL_TREE
, str
, list
);
5145 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5146 c_parser_consume_token (parser
);
5153 /* Parse asm goto labels, a GNU extension.
5157 asm-goto-operands , identifier
5161 c_parser_asm_goto_operands (c_parser
*parser
)
5163 tree list
= NULL_TREE
;
5168 if (c_parser_next_token_is (parser
, CPP_NAME
))
5170 c_token
*tok
= c_parser_peek_token (parser
);
5172 label
= lookup_label_for_goto (tok
->location
, name
);
5173 c_parser_consume_token (parser
);
5174 TREE_USED (label
) = 1;
5178 c_parser_error (parser
, "expected identifier");
5182 name
= build_string (IDENTIFIER_LENGTH (name
),
5183 IDENTIFIER_POINTER (name
));
5184 list
= tree_cons (name
, label
, list
);
5185 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5186 c_parser_consume_token (parser
);
5188 return nreverse (list
);
5192 /* Parse an expression other than a compound expression; that is, an
5193 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
5194 NULL then it is an Objective-C message expression which is the
5195 primary-expression starting the expression as an initializer.
5197 assignment-expression:
5198 conditional-expression
5199 unary-expression assignment-operator assignment-expression
5201 assignment-operator: one of
5202 = *= /= %= += -= <<= >>= &= ^= |=
5204 In GNU C we accept any conditional expression on the LHS and
5205 diagnose the invalid lvalue rather than producing a syntax
5208 static struct c_expr
5209 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
5211 struct c_expr lhs
, rhs
, ret
;
5212 enum tree_code code
;
5213 location_t op_location
, exp_location
;
5214 gcc_assert (!after
|| c_dialect_objc ());
5215 lhs
= c_parser_conditional_expression (parser
, after
);
5216 op_location
= c_parser_peek_token (parser
)->location
;
5217 switch (c_parser_peek_token (parser
)->type
)
5226 code
= TRUNC_DIV_EXPR
;
5229 code
= TRUNC_MOD_EXPR
;
5244 code
= BIT_AND_EXPR
;
5247 code
= BIT_XOR_EXPR
;
5250 code
= BIT_IOR_EXPR
;
5255 c_parser_consume_token (parser
);
5256 exp_location
= c_parser_peek_token (parser
)->location
;
5257 rhs
= c_parser_expr_no_commas (parser
, NULL
);
5258 rhs
= default_function_array_read_conversion (exp_location
, rhs
);
5259 ret
.value
= build_modify_expr (op_location
, lhs
.value
, lhs
.original_type
,
5260 code
, exp_location
, rhs
.value
,
5262 if (code
== NOP_EXPR
)
5263 ret
.original_code
= MODIFY_EXPR
;
5266 TREE_NO_WARNING (ret
.value
) = 1;
5267 ret
.original_code
= ERROR_MARK
;
5269 ret
.original_type
= NULL
;
5273 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
5274 is not NULL then it is an Objective-C message expression which is
5275 the primary-expression starting the expression as an initializer.
5277 conditional-expression:
5278 logical-OR-expression
5279 logical-OR-expression ? expression : conditional-expression
5283 conditional-expression:
5284 logical-OR-expression ? : conditional-expression
5287 static struct c_expr
5288 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
5290 struct c_expr cond
, exp1
, exp2
, ret
;
5291 location_t cond_loc
, colon_loc
, middle_loc
;
5293 gcc_assert (!after
|| c_dialect_objc ());
5295 cond
= c_parser_binary_expression (parser
, after
);
5297 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
5299 cond_loc
= c_parser_peek_token (parser
)->location
;
5300 cond
= default_function_array_read_conversion (cond_loc
, cond
);
5301 c_parser_consume_token (parser
);
5302 if (c_parser_next_token_is (parser
, CPP_COLON
))
5304 tree eptype
= NULL_TREE
;
5306 middle_loc
= c_parser_peek_token (parser
)->location
;
5307 pedwarn (middle_loc
, OPT_pedantic
,
5308 "ISO C forbids omitting the middle term of a ?: expression");
5309 warn_for_omitted_condop (middle_loc
, cond
.value
);
5310 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
5312 eptype
= TREE_TYPE (cond
.value
);
5313 cond
.value
= TREE_OPERAND (cond
.value
, 0);
5315 /* Make sure first operand is calculated only once. */
5316 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
5318 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
5319 exp1
.original_type
= NULL
;
5320 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
5321 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_true_node
;
5326 = c_objc_common_truthvalue_conversion
5327 (cond_loc
, default_conversion (cond
.value
));
5328 c_inhibit_evaluation_warnings
+= cond
.value
== truthvalue_false_node
;
5329 exp1
= c_parser_expression_conv (parser
);
5330 mark_exp_read (exp1
.value
);
5331 c_inhibit_evaluation_warnings
+=
5332 ((cond
.value
== truthvalue_true_node
)
5333 - (cond
.value
== truthvalue_false_node
));
5336 colon_loc
= c_parser_peek_token (parser
)->location
;
5337 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
5339 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5340 ret
.value
= error_mark_node
;
5341 ret
.original_code
= ERROR_MARK
;
5342 ret
.original_type
= NULL
;
5346 location_t exp2_loc
= c_parser_peek_token (parser
)->location
;
5347 exp2
= c_parser_conditional_expression (parser
, NULL
);
5348 exp2
= default_function_array_read_conversion (exp2_loc
, exp2
);
5350 c_inhibit_evaluation_warnings
-= cond
.value
== truthvalue_true_node
;
5351 ret
.value
= build_conditional_expr (colon_loc
, cond
.value
,
5352 cond
.original_code
== C_MAYBE_CONST_EXPR
,
5353 exp1
.value
, exp1
.original_type
,
5354 exp2
.value
, exp2
.original_type
);
5355 ret
.original_code
= ERROR_MARK
;
5356 if (exp1
.value
== error_mark_node
|| exp2
.value
== error_mark_node
)
5357 ret
.original_type
= NULL
;
5362 /* If both sides are enum type, the default conversion will have
5363 made the type of the result be an integer type. We want to
5364 remember the enum types we started with. */
5365 t1
= exp1
.original_type
? exp1
.original_type
: TREE_TYPE (exp1
.value
);
5366 t2
= exp2
.original_type
? exp2
.original_type
: TREE_TYPE (exp2
.value
);
5367 ret
.original_type
= ((t1
!= error_mark_node
5368 && t2
!= error_mark_node
5369 && (TYPE_MAIN_VARIANT (t1
)
5370 == TYPE_MAIN_VARIANT (t2
)))
5377 /* Parse a binary expression; that is, a logical-OR-expression (C90
5378 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
5379 an Objective-C message expression which is the primary-expression
5380 starting the expression as an initializer.
5382 multiplicative-expression:
5384 multiplicative-expression * cast-expression
5385 multiplicative-expression / cast-expression
5386 multiplicative-expression % cast-expression
5388 additive-expression:
5389 multiplicative-expression
5390 additive-expression + multiplicative-expression
5391 additive-expression - multiplicative-expression
5395 shift-expression << additive-expression
5396 shift-expression >> additive-expression
5398 relational-expression:
5400 relational-expression < shift-expression
5401 relational-expression > shift-expression
5402 relational-expression <= shift-expression
5403 relational-expression >= shift-expression
5405 equality-expression:
5406 relational-expression
5407 equality-expression == relational-expression
5408 equality-expression != relational-expression
5412 AND-expression & equality-expression
5414 exclusive-OR-expression:
5416 exclusive-OR-expression ^ AND-expression
5418 inclusive-OR-expression:
5419 exclusive-OR-expression
5420 inclusive-OR-expression | exclusive-OR-expression
5422 logical-AND-expression:
5423 inclusive-OR-expression
5424 logical-AND-expression && inclusive-OR-expression
5426 logical-OR-expression:
5427 logical-AND-expression
5428 logical-OR-expression || logical-AND-expression
5431 static struct c_expr
5432 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
5434 /* A binary expression is parsed using operator-precedence parsing,
5435 with the operands being cast expressions. All the binary
5436 operators are left-associative. Thus a binary expression is of
5439 E0 op1 E1 op2 E2 ...
5441 which we represent on a stack. On the stack, the precedence
5442 levels are strictly increasing. When a new operator is
5443 encountered of higher precedence than that at the top of the
5444 stack, it is pushed; its LHS is the top expression, and its RHS
5445 is everything parsed until it is popped. When a new operator is
5446 encountered with precedence less than or equal to that at the top
5447 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
5448 by the result of the operation until the operator at the top of
5449 the stack has lower precedence than the new operator or there is
5450 only one element on the stack; then the top expression is the LHS
5451 of the new operator. In the case of logical AND and OR
5452 expressions, we also need to adjust c_inhibit_evaluation_warnings
5453 as appropriate when the operators are pushed and popped. */
5455 /* The precedence levels, where 0 is a dummy lowest level used for
5456 the bottom of the stack. */
5472 /* The expression at this stack level. */
5474 /* The precedence of the operator on its left, PREC_NONE at the
5475 bottom of the stack. */
5477 /* The operation on its left. */
5479 /* The source location of this operation. */
5483 /* Location of the binary operator. */
5484 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
5487 switch (stack[sp].op) \
5489 case TRUTH_ANDIF_EXPR: \
5490 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5491 == truthvalue_false_node); \
5493 case TRUTH_ORIF_EXPR: \
5494 c_inhibit_evaluation_warnings -= (stack[sp - 1].expr.value \
5495 == truthvalue_true_node); \
5500 stack[sp - 1].expr \
5501 = default_function_array_read_conversion (stack[sp - 1].loc, \
5502 stack[sp - 1].expr); \
5504 = default_function_array_read_conversion (stack[sp].loc, \
5506 stack[sp - 1].expr = parser_build_binary_op (stack[sp].loc, \
5508 stack[sp - 1].expr, \
5512 gcc_assert (!after
|| c_dialect_objc ());
5513 stack
[0].loc
= c_parser_peek_token (parser
)->location
;
5514 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
5515 stack
[0].prec
= PREC_NONE
;
5520 enum tree_code ocode
;
5523 switch (c_parser_peek_token (parser
)->type
)
5531 ocode
= TRUNC_DIV_EXPR
;
5535 ocode
= TRUNC_MOD_EXPR
;
5547 ocode
= LSHIFT_EXPR
;
5551 ocode
= RSHIFT_EXPR
;
5565 case CPP_GREATER_EQ
:
5578 oprec
= PREC_BITAND
;
5579 ocode
= BIT_AND_EXPR
;
5582 oprec
= PREC_BITXOR
;
5583 ocode
= BIT_XOR_EXPR
;
5587 ocode
= BIT_IOR_EXPR
;
5590 oprec
= PREC_LOGAND
;
5591 ocode
= TRUTH_ANDIF_EXPR
;
5595 ocode
= TRUTH_ORIF_EXPR
;
5598 /* Not a binary operator, so end of the binary
5602 binary_loc
= c_parser_peek_token (parser
)->location
;
5603 c_parser_consume_token (parser
);
5604 while (oprec
<= stack
[sp
].prec
)
5608 case TRUTH_ANDIF_EXPR
:
5610 = default_function_array_read_conversion (stack
[sp
].loc
,
5612 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5613 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5614 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5615 == truthvalue_false_node
);
5617 case TRUTH_ORIF_EXPR
:
5619 = default_function_array_read_conversion (stack
[sp
].loc
,
5621 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
5622 (stack
[sp
].loc
, default_conversion (stack
[sp
].expr
.value
));
5623 c_inhibit_evaluation_warnings
+= (stack
[sp
].expr
.value
5624 == truthvalue_true_node
);
5630 stack
[sp
].loc
= binary_loc
;
5631 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
5632 stack
[sp
].prec
= oprec
;
5633 stack
[sp
].op
= ocode
;
5634 stack
[sp
].loc
= binary_loc
;
5639 return stack
[0].expr
;
5643 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
5644 NULL then it is an Objective-C message expression which is the
5645 primary-expression starting the expression as an initializer.
5649 ( type-name ) unary-expression
5652 static struct c_expr
5653 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
5655 location_t cast_loc
= c_parser_peek_token (parser
)->location
;
5656 gcc_assert (!after
|| c_dialect_objc ());
5658 return c_parser_postfix_expression_after_primary (parser
,
5660 /* If the expression begins with a parenthesized type name, it may
5661 be either a cast or a compound literal; we need to see whether
5662 the next character is '{' to tell the difference. If not, it is
5663 an unary expression. Full detection of unknown typenames here
5664 would require a 3-token lookahead. */
5665 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5666 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5668 struct c_type_name
*type_name
;
5671 c_parser_consume_token (parser
);
5672 type_name
= c_parser_type_name (parser
);
5673 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5674 if (type_name
== NULL
)
5676 ret
.value
= error_mark_node
;
5677 ret
.original_code
= ERROR_MARK
;
5678 ret
.original_type
= NULL
;
5682 /* Save casted types in the function's used types hash table. */
5683 used_types_insert (type_name
->specs
->type
);
5685 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5686 return c_parser_postfix_expression_after_paren_type (parser
, type_name
,
5689 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
5690 expr
= c_parser_cast_expression (parser
, NULL
);
5691 expr
= default_function_array_read_conversion (expr_loc
, expr
);
5693 ret
.value
= c_cast_expr (cast_loc
, type_name
, expr
.value
);
5694 ret
.original_code
= ERROR_MARK
;
5695 ret
.original_type
= NULL
;
5699 return c_parser_unary_expression (parser
);
5702 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
5708 unary-operator cast-expression
5709 sizeof unary-expression
5710 sizeof ( type-name )
5712 unary-operator: one of
5718 __alignof__ unary-expression
5719 __alignof__ ( type-name )
5722 unary-operator: one of
5723 __extension__ __real__ __imag__
5725 In addition, the GNU syntax treats ++ and -- as unary operators, so
5726 they may be applied to cast expressions with errors for non-lvalues
5729 static struct c_expr
5730 c_parser_unary_expression (c_parser
*parser
)
5733 struct c_expr ret
, op
;
5734 location_t op_loc
= c_parser_peek_token (parser
)->location
;
5736 ret
.original_code
= ERROR_MARK
;
5737 ret
.original_type
= NULL
;
5738 switch (c_parser_peek_token (parser
)->type
)
5741 c_parser_consume_token (parser
);
5742 exp_loc
= c_parser_peek_token (parser
)->location
;
5743 op
= c_parser_cast_expression (parser
, NULL
);
5744 op
= default_function_array_read_conversion (exp_loc
, op
);
5745 return parser_build_unary_op (op_loc
, PREINCREMENT_EXPR
, op
);
5746 case CPP_MINUS_MINUS
:
5747 c_parser_consume_token (parser
);
5748 exp_loc
= c_parser_peek_token (parser
)->location
;
5749 op
= c_parser_cast_expression (parser
, NULL
);
5750 op
= default_function_array_read_conversion (exp_loc
, op
);
5751 return parser_build_unary_op (op_loc
, PREDECREMENT_EXPR
, op
);
5753 c_parser_consume_token (parser
);
5754 op
= c_parser_cast_expression (parser
, NULL
);
5755 mark_exp_read (op
.value
);
5756 return parser_build_unary_op (op_loc
, ADDR_EXPR
, op
);
5758 c_parser_consume_token (parser
);
5759 exp_loc
= c_parser_peek_token (parser
)->location
;
5760 op
= c_parser_cast_expression (parser
, NULL
);
5761 op
= default_function_array_read_conversion (exp_loc
, op
);
5762 ret
.value
= build_indirect_ref (op_loc
, op
.value
, RO_UNARY_STAR
);
5765 if (!c_dialect_objc () && !in_system_header
)
5768 "traditional C rejects the unary plus operator");
5769 c_parser_consume_token (parser
);
5770 exp_loc
= c_parser_peek_token (parser
)->location
;
5771 op
= c_parser_cast_expression (parser
, NULL
);
5772 op
= default_function_array_read_conversion (exp_loc
, op
);
5773 return parser_build_unary_op (op_loc
, CONVERT_EXPR
, op
);
5775 c_parser_consume_token (parser
);
5776 exp_loc
= c_parser_peek_token (parser
)->location
;
5777 op
= c_parser_cast_expression (parser
, NULL
);
5778 op
= default_function_array_read_conversion (exp_loc
, op
);
5779 return parser_build_unary_op (op_loc
, NEGATE_EXPR
, op
);
5781 c_parser_consume_token (parser
);
5782 exp_loc
= c_parser_peek_token (parser
)->location
;
5783 op
= c_parser_cast_expression (parser
, NULL
);
5784 op
= default_function_array_read_conversion (exp_loc
, op
);
5785 return parser_build_unary_op (op_loc
, BIT_NOT_EXPR
, op
);
5787 c_parser_consume_token (parser
);
5788 exp_loc
= c_parser_peek_token (parser
)->location
;
5789 op
= c_parser_cast_expression (parser
, NULL
);
5790 op
= default_function_array_read_conversion (exp_loc
, op
);
5791 return parser_build_unary_op (op_loc
, TRUTH_NOT_EXPR
, op
);
5793 /* Refer to the address of a label as a pointer. */
5794 c_parser_consume_token (parser
);
5795 if (c_parser_next_token_is (parser
, CPP_NAME
))
5797 ret
.value
= finish_label_address_expr
5798 (c_parser_peek_token (parser
)->value
, op_loc
);
5799 c_parser_consume_token (parser
);
5803 c_parser_error (parser
, "expected identifier");
5804 ret
.value
= error_mark_node
;
5808 switch (c_parser_peek_token (parser
)->keyword
)
5811 return c_parser_sizeof_expression (parser
);
5813 return c_parser_alignof_expression (parser
);
5815 c_parser_consume_token (parser
);
5816 ext
= disable_extension_diagnostics ();
5817 ret
= c_parser_cast_expression (parser
, NULL
);
5818 restore_extension_diagnostics (ext
);
5821 c_parser_consume_token (parser
);
5822 exp_loc
= c_parser_peek_token (parser
)->location
;
5823 op
= c_parser_cast_expression (parser
, NULL
);
5824 op
= default_function_array_conversion (exp_loc
, op
);
5825 return parser_build_unary_op (op_loc
, REALPART_EXPR
, op
);
5827 c_parser_consume_token (parser
);
5828 exp_loc
= c_parser_peek_token (parser
)->location
;
5829 op
= c_parser_cast_expression (parser
, NULL
);
5830 op
= default_function_array_conversion (exp_loc
, op
);
5831 return parser_build_unary_op (op_loc
, IMAGPART_EXPR
, op
);
5833 return c_parser_postfix_expression (parser
);
5836 return c_parser_postfix_expression (parser
);
5840 /* Parse a sizeof expression. */
5842 static struct c_expr
5843 c_parser_sizeof_expression (c_parser
*parser
)
5846 location_t expr_loc
;
5847 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
5848 c_parser_consume_token (parser
);
5849 c_inhibit_evaluation_warnings
++;
5851 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5852 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5854 /* Either sizeof ( type-name ) or sizeof unary-expression
5855 starting with a compound literal. */
5856 struct c_type_name
*type_name
;
5857 c_parser_consume_token (parser
);
5858 expr_loc
= c_parser_peek_token (parser
)->location
;
5859 type_name
= c_parser_type_name (parser
);
5860 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5861 if (type_name
== NULL
)
5864 c_inhibit_evaluation_warnings
--;
5866 ret
.value
= error_mark_node
;
5867 ret
.original_code
= ERROR_MARK
;
5868 ret
.original_type
= NULL
;
5871 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5873 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5878 /* sizeof ( type-name ). */
5879 c_inhibit_evaluation_warnings
--;
5881 return c_expr_sizeof_type (expr_loc
, type_name
);
5885 expr_loc
= c_parser_peek_token (parser
)->location
;
5886 expr
= c_parser_unary_expression (parser
);
5888 c_inhibit_evaluation_warnings
--;
5890 mark_exp_read (expr
.value
);
5891 if (TREE_CODE (expr
.value
) == COMPONENT_REF
5892 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
5893 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
5894 return c_expr_sizeof_expr (expr_loc
, expr
);
5898 /* Parse an alignof expression. */
5900 static struct c_expr
5901 c_parser_alignof_expression (c_parser
*parser
)
5904 location_t loc
= c_parser_peek_token (parser
)->location
;
5905 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
5906 c_parser_consume_token (parser
);
5907 c_inhibit_evaluation_warnings
++;
5909 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5910 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5912 /* Either __alignof__ ( type-name ) or __alignof__
5913 unary-expression starting with a compound literal. */
5915 struct c_type_name
*type_name
;
5917 c_parser_consume_token (parser
);
5918 loc
= c_parser_peek_token (parser
)->location
;
5919 type_name
= c_parser_type_name (parser
);
5920 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5921 if (type_name
== NULL
)
5924 c_inhibit_evaluation_warnings
--;
5926 ret
.value
= error_mark_node
;
5927 ret
.original_code
= ERROR_MARK
;
5928 ret
.original_type
= NULL
;
5931 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5933 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5938 /* alignof ( type-name ). */
5939 c_inhibit_evaluation_warnings
--;
5941 ret
.value
= c_alignof (loc
, groktypename (type_name
, NULL
, NULL
));
5942 ret
.original_code
= ERROR_MARK
;
5943 ret
.original_type
= NULL
;
5949 expr
= c_parser_unary_expression (parser
);
5951 mark_exp_read (expr
.value
);
5952 c_inhibit_evaluation_warnings
--;
5954 ret
.value
= c_alignof_expr (loc
, expr
.value
);
5955 ret
.original_code
= ERROR_MARK
;
5956 ret
.original_type
= NULL
;
5961 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5965 postfix-expression [ expression ]
5966 postfix-expression ( argument-expression-list[opt] )
5967 postfix-expression . identifier
5968 postfix-expression -> identifier
5969 postfix-expression ++
5970 postfix-expression --
5971 ( type-name ) { initializer-list }
5972 ( type-name ) { initializer-list , }
5974 argument-expression-list:
5976 argument-expression-list , argument-expression
5988 (treated as a keyword in GNU C)
5991 ( compound-statement )
5992 __builtin_va_arg ( assignment-expression , type-name )
5993 __builtin_offsetof ( type-name , offsetof-member-designator )
5994 __builtin_choose_expr ( assignment-expression ,
5995 assignment-expression ,
5996 assignment-expression )
5997 __builtin_types_compatible_p ( type-name , type-name )
5999 offsetof-member-designator:
6001 offsetof-member-designator . identifier
6002 offsetof-member-designator [ expression ]
6007 [ objc-receiver objc-message-args ]
6008 @selector ( objc-selector-arg )
6009 @protocol ( identifier )
6010 @encode ( type-name )
6012 Classname . identifier
6015 static struct c_expr
6016 c_parser_postfix_expression (c_parser
*parser
)
6018 struct c_expr expr
, e1
, e2
, e3
;
6019 struct c_type_name
*t1
, *t2
;
6020 location_t loc
= c_parser_peek_token (parser
)->location
;;
6021 expr
.original_code
= ERROR_MARK
;
6022 expr
.original_type
= NULL
;
6023 switch (c_parser_peek_token (parser
)->type
)
6026 expr
.value
= c_parser_peek_token (parser
)->value
;
6027 loc
= c_parser_peek_token (parser
)->location
;
6028 c_parser_consume_token (parser
);
6029 if (TREE_CODE (expr
.value
) == FIXED_CST
6030 && !targetm
.fixed_point_supported_p ())
6032 error_at (loc
, "fixed-point types not supported for this target");
6033 expr
.value
= error_mark_node
;
6040 expr
.value
= c_parser_peek_token (parser
)->value
;
6041 c_parser_consume_token (parser
);
6047 case CPP_UTF8STRING
:
6048 expr
.value
= c_parser_peek_token (parser
)->value
;
6049 expr
.original_code
= STRING_CST
;
6050 c_parser_consume_token (parser
);
6052 case CPP_OBJC_STRING
:
6053 gcc_assert (c_dialect_objc ());
6055 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
6056 c_parser_consume_token (parser
);
6059 switch (c_parser_peek_token (parser
)->id_kind
)
6063 tree id
= c_parser_peek_token (parser
)->value
;
6064 c_parser_consume_token (parser
);
6065 expr
.value
= build_external_ref (loc
, id
,
6066 (c_parser_peek_token (parser
)->type
6068 &expr
.original_type
);
6071 case C_ID_CLASSNAME
:
6073 /* Here we parse the Objective-C 2.0 Class.name dot
6075 tree class_name
= c_parser_peek_token (parser
)->value
;
6077 c_parser_consume_token (parser
);
6078 gcc_assert (c_dialect_objc ());
6079 if (!c_parser_require (parser
, CPP_DOT
, "expected %<.%>"))
6081 expr
.value
= error_mark_node
;
6084 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6086 c_parser_error (parser
, "expected identifier");
6087 expr
.value
= error_mark_node
;
6090 component
= c_parser_peek_token (parser
)->value
;
6091 c_parser_consume_token (parser
);
6092 expr
.value
= objc_build_class_component_ref (class_name
,
6097 c_parser_error (parser
, "expected expression");
6098 expr
.value
= error_mark_node
;
6102 case CPP_OPEN_PAREN
:
6103 /* A parenthesized expression, statement expression or compound
6105 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
6107 /* A statement expression. */
6109 location_t brace_loc
;
6110 c_parser_consume_token (parser
);
6111 brace_loc
= c_parser_peek_token (parser
)->location
;
6112 c_parser_consume_token (parser
);
6113 if (cur_stmt_list
== NULL
)
6115 error_at (loc
, "braced-group within expression allowed "
6116 "only inside a function");
6117 parser
->error
= true;
6118 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
6119 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6120 expr
.value
= error_mark_node
;
6123 stmt
= c_begin_stmt_expr ();
6124 c_parser_compound_statement_nostart (parser
);
6125 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6127 pedwarn (loc
, OPT_pedantic
,
6128 "ISO C forbids braced-groups within expressions");
6129 expr
.value
= c_finish_stmt_expr (brace_loc
, stmt
);
6130 mark_exp_read (expr
.value
);
6132 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
6134 /* A compound literal. ??? Can we actually get here rather
6135 than going directly to
6136 c_parser_postfix_expression_after_paren_type from
6139 struct c_type_name
*type_name
;
6140 c_parser_consume_token (parser
);
6141 loc
= c_parser_peek_token (parser
)->location
;
6142 type_name
= c_parser_type_name (parser
);
6143 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6145 if (type_name
== NULL
)
6147 expr
.value
= error_mark_node
;
6150 expr
= c_parser_postfix_expression_after_paren_type (parser
,
6156 /* A parenthesized expression. */
6157 c_parser_consume_token (parser
);
6158 expr
= c_parser_expression (parser
);
6159 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
6160 TREE_NO_WARNING (expr
.value
) = 1;
6161 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
6162 expr
.original_code
= ERROR_MARK
;
6163 /* Don't change EXPR.ORIGINAL_TYPE. */
6164 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6169 switch (c_parser_peek_token (parser
)->keyword
)
6171 case RID_FUNCTION_NAME
:
6172 case RID_PRETTY_FUNCTION_NAME
:
6173 case RID_C99_FUNCTION_NAME
:
6174 expr
.value
= fname_decl (loc
,
6175 c_parser_peek_token (parser
)->keyword
,
6176 c_parser_peek_token (parser
)->value
);
6177 c_parser_consume_token (parser
);
6180 c_parser_consume_token (parser
);
6181 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6183 expr
.value
= error_mark_node
;
6186 e1
= c_parser_expr_no_commas (parser
, NULL
);
6187 mark_exp_read (e1
.value
);
6188 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
6189 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6191 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6192 expr
.value
= error_mark_node
;
6195 loc
= c_parser_peek_token (parser
)->location
;
6196 t1
= c_parser_type_name (parser
);
6197 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6201 expr
.value
= error_mark_node
;
6205 tree type_expr
= NULL_TREE
;
6206 expr
.value
= c_build_va_arg (loc
, e1
.value
,
6207 groktypename (t1
, &type_expr
, NULL
));
6210 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
6211 TREE_TYPE (expr
.value
), type_expr
,
6213 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
6218 c_parser_consume_token (parser
);
6219 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6221 expr
.value
= error_mark_node
;
6224 t1
= c_parser_type_name (parser
);
6226 parser
->error
= true;
6227 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6228 gcc_assert (parser
->error
);
6231 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6232 expr
.value
= error_mark_node
;
6237 tree type
= groktypename (t1
, NULL
, NULL
);
6239 if (type
== error_mark_node
)
6240 offsetof_ref
= error_mark_node
;
6243 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
6244 SET_EXPR_LOCATION (offsetof_ref
, loc
);
6246 /* Parse the second argument to __builtin_offsetof. We
6247 must have one identifier, and beyond that we want to
6248 accept sub structure and sub array references. */
6249 if (c_parser_next_token_is (parser
, CPP_NAME
))
6251 offsetof_ref
= build_component_ref
6252 (loc
, offsetof_ref
, c_parser_peek_token (parser
)->value
);
6253 c_parser_consume_token (parser
);
6254 while (c_parser_next_token_is (parser
, CPP_DOT
)
6255 || c_parser_next_token_is (parser
,
6257 || c_parser_next_token_is (parser
,
6260 if (c_parser_next_token_is (parser
, CPP_DEREF
))
6262 loc
= c_parser_peek_token (parser
)->location
;
6263 offsetof_ref
= build_array_ref (loc
,
6268 else if (c_parser_next_token_is (parser
, CPP_DOT
))
6271 c_parser_consume_token (parser
);
6272 if (c_parser_next_token_is_not (parser
,
6275 c_parser_error (parser
, "expected identifier");
6278 offsetof_ref
= build_component_ref
6280 c_parser_peek_token (parser
)->value
);
6281 c_parser_consume_token (parser
);
6286 loc
= c_parser_peek_token (parser
)->location
;
6287 c_parser_consume_token (parser
);
6288 idx
= c_parser_expression (parser
).value
;
6289 idx
= c_fully_fold (idx
, false, NULL
);
6290 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6292 offsetof_ref
= build_array_ref (loc
, offsetof_ref
, idx
);
6297 c_parser_error (parser
, "expected identifier");
6298 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6300 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
6303 case RID_CHOOSE_EXPR
:
6304 c_parser_consume_token (parser
);
6305 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6307 expr
.value
= error_mark_node
;
6310 loc
= c_parser_peek_token (parser
)->location
;
6311 e1
= c_parser_expr_no_commas (parser
, NULL
);
6312 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6314 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6315 expr
.value
= error_mark_node
;
6318 e2
= c_parser_expr_no_commas (parser
, NULL
);
6319 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6321 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6322 expr
.value
= error_mark_node
;
6325 e3
= c_parser_expr_no_commas (parser
, NULL
);
6326 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6332 mark_exp_read (e2
.value
);
6333 mark_exp_read (e3
.value
);
6334 if (TREE_CODE (c
) != INTEGER_CST
6335 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
6337 "first argument to %<__builtin_choose_expr%> not"
6339 constant_expression_warning (c
);
6340 expr
= integer_zerop (c
) ? e3
: e2
;
6343 case RID_TYPES_COMPATIBLE_P
:
6344 c_parser_consume_token (parser
);
6345 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6347 expr
.value
= error_mark_node
;
6350 t1
= c_parser_type_name (parser
);
6353 expr
.value
= error_mark_node
;
6356 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
6358 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6359 expr
.value
= error_mark_node
;
6362 t2
= c_parser_type_name (parser
);
6365 expr
.value
= error_mark_node
;
6368 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6373 e1
= TYPE_MAIN_VARIANT (groktypename (t1
, NULL
, NULL
));
6374 e2
= TYPE_MAIN_VARIANT (groktypename (t2
, NULL
, NULL
));
6377 = comptypes (e1
, e2
) ? integer_one_node
: integer_zero_node
;
6380 case RID_AT_SELECTOR
:
6381 gcc_assert (c_dialect_objc ());
6382 c_parser_consume_token (parser
);
6383 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6385 expr
.value
= error_mark_node
;
6389 tree sel
= c_parser_objc_selector_arg (parser
);
6390 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6392 expr
.value
= objc_build_selector_expr (loc
, sel
);
6395 case RID_AT_PROTOCOL
:
6396 gcc_assert (c_dialect_objc ());
6397 c_parser_consume_token (parser
);
6398 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6400 expr
.value
= error_mark_node
;
6403 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6405 c_parser_error (parser
, "expected identifier");
6406 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6407 expr
.value
= error_mark_node
;
6411 tree id
= c_parser_peek_token (parser
)->value
;
6412 c_parser_consume_token (parser
);
6413 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6415 expr
.value
= objc_build_protocol_expr (id
);
6419 /* Extension to support C-structures in the archiver. */
6420 gcc_assert (c_dialect_objc ());
6421 c_parser_consume_token (parser
);
6422 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6424 expr
.value
= error_mark_node
;
6427 t1
= c_parser_type_name (parser
);
6430 expr
.value
= error_mark_node
;
6431 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6434 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6437 tree type
= groktypename (t1
, NULL
, NULL
);
6438 expr
.value
= objc_build_encode_expr (type
);
6442 c_parser_error (parser
, "expected expression");
6443 expr
.value
= error_mark_node
;
6447 case CPP_OPEN_SQUARE
:
6448 if (c_dialect_objc ())
6450 tree receiver
, args
;
6451 c_parser_consume_token (parser
);
6452 receiver
= c_parser_objc_receiver (parser
);
6453 args
= c_parser_objc_message_args (parser
);
6454 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6456 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
6460 /* Else fall through to report error. */
6462 c_parser_error (parser
, "expected expression");
6463 expr
.value
= error_mark_node
;
6466 return c_parser_postfix_expression_after_primary (parser
, loc
, expr
);
6469 /* Parse a postfix expression after a parenthesized type name: the
6470 brace-enclosed initializer of a compound literal, possibly followed
6471 by some postfix operators. This is separate because it is not
6472 possible to tell until after the type name whether a cast
6473 expression has a cast or a compound literal, or whether the operand
6474 of sizeof is a parenthesized type name or starts with a compound
6475 literal. TYPE_LOC is the location where TYPE_NAME starts--the
6476 location of the first token after the parentheses around the type
6479 static struct c_expr
6480 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
6481 struct c_type_name
*type_name
,
6482 location_t type_loc
)
6488 location_t start_loc
;
6489 tree type_expr
= NULL_TREE
;
6490 bool type_expr_const
= true;
6491 check_compound_literal_type (type_loc
, type_name
);
6492 start_init (NULL_TREE
, NULL
, 0);
6493 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
6494 start_loc
= c_parser_peek_token (parser
)->location
;
6495 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
6497 error_at (type_loc
, "compound literal has variable size");
6498 type
= error_mark_node
;
6500 init
= c_parser_braced_init (parser
, type
, false);
6502 maybe_warn_string_init (type
, init
);
6504 if (type
!= error_mark_node
6505 && !ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type
))
6506 && current_function_decl
)
6508 error ("compound literal qualified by address-space qualifier");
6509 type
= error_mark_node
;
6513 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
6514 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
6515 ? CONSTRUCTOR_NON_CONST (init
.value
)
6516 : init
.original_code
== C_MAYBE_CONST_EXPR
);
6517 non_const
|= !type_expr_const
;
6518 expr
.value
= build_compound_literal (start_loc
, type
, init
.value
, non_const
);
6519 expr
.original_code
= ERROR_MARK
;
6520 expr
.original_type
= NULL
;
6523 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
6525 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
6526 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
6530 gcc_assert (!non_const
);
6531 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
6532 type_expr
, expr
.value
);
6535 return c_parser_postfix_expression_after_primary (parser
, start_loc
, expr
);
6538 /* Parse a postfix expression after the initial primary or compound
6539 literal; that is, parse a series of postfix operators.
6541 EXPR_LOC is the location of the primary expression. */
6543 static struct c_expr
6544 c_parser_postfix_expression_after_primary (c_parser
*parser
,
6545 location_t expr_loc
,
6548 struct c_expr orig_expr
;
6550 VEC(tree
,gc
) *exprlist
;
6551 VEC(tree
,gc
) *origtypes
;
6554 location_t op_loc
= c_parser_peek_token (parser
)->location
;
6555 switch (c_parser_peek_token (parser
)->type
)
6557 case CPP_OPEN_SQUARE
:
6558 /* Array reference. */
6559 c_parser_consume_token (parser
);
6560 idx
= c_parser_expression (parser
).value
;
6561 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
6563 expr
.value
= build_array_ref (op_loc
, expr
.value
, idx
);
6564 expr
.original_code
= ERROR_MARK
;
6565 expr
.original_type
= NULL
;
6567 case CPP_OPEN_PAREN
:
6568 /* Function call. */
6569 c_parser_consume_token (parser
);
6570 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6573 exprlist
= c_parser_expr_list (parser
, true, false, &origtypes
);
6574 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6577 mark_exp_read (expr
.value
);
6578 /* FIXME diagnostics: Ideally we want the FUNCNAME, not the
6579 "(" after the FUNCNAME, which is what we have now. */
6580 expr
.value
= build_function_call_vec (op_loc
, expr
.value
, exprlist
,
6582 expr
.original_code
= ERROR_MARK
;
6583 if (TREE_CODE (expr
.value
) == INTEGER_CST
6584 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
6585 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
6586 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
6587 expr
.original_code
= C_MAYBE_CONST_EXPR
;
6588 expr
.original_type
= NULL
;
6589 if (exprlist
!= NULL
)
6591 release_tree_vector (exprlist
);
6592 release_tree_vector (origtypes
);
6596 /* Structure element reference. */
6597 c_parser_consume_token (parser
);
6598 expr
= default_function_array_conversion (expr_loc
, expr
);
6599 if (c_parser_next_token_is (parser
, CPP_NAME
))
6600 ident
= c_parser_peek_token (parser
)->value
;
6603 c_parser_error (parser
, "expected identifier");
6604 expr
.value
= error_mark_node
;
6605 expr
.original_code
= ERROR_MARK
;
6606 expr
.original_type
= NULL
;
6609 c_parser_consume_token (parser
);
6610 expr
.value
= build_component_ref (op_loc
, expr
.value
, ident
);
6611 expr
.original_code
= ERROR_MARK
;
6612 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6613 expr
.original_type
= NULL
;
6616 /* Remember the original type of a bitfield. */
6617 tree field
= TREE_OPERAND (expr
.value
, 1);
6618 if (TREE_CODE (field
) != FIELD_DECL
)
6619 expr
.original_type
= NULL
;
6621 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6625 /* Structure element reference. */
6626 c_parser_consume_token (parser
);
6627 expr
= default_function_array_conversion (expr_loc
, expr
);
6628 if (c_parser_next_token_is (parser
, CPP_NAME
))
6629 ident
= c_parser_peek_token (parser
)->value
;
6632 c_parser_error (parser
, "expected identifier");
6633 expr
.value
= error_mark_node
;
6634 expr
.original_code
= ERROR_MARK
;
6635 expr
.original_type
= NULL
;
6638 c_parser_consume_token (parser
);
6639 expr
.value
= build_component_ref (op_loc
,
6640 build_indirect_ref (op_loc
,
6644 expr
.original_code
= ERROR_MARK
;
6645 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
6646 expr
.original_type
= NULL
;
6649 /* Remember the original type of a bitfield. */
6650 tree field
= TREE_OPERAND (expr
.value
, 1);
6651 if (TREE_CODE (field
) != FIELD_DECL
)
6652 expr
.original_type
= NULL
;
6654 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
6658 /* Postincrement. */
6659 c_parser_consume_token (parser
);
6660 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6661 expr
.value
= build_unary_op (op_loc
,
6662 POSTINCREMENT_EXPR
, expr
.value
, 0);
6663 expr
.original_code
= ERROR_MARK
;
6664 expr
.original_type
= NULL
;
6666 case CPP_MINUS_MINUS
:
6667 /* Postdecrement. */
6668 c_parser_consume_token (parser
);
6669 expr
= default_function_array_read_conversion (expr_loc
, expr
);
6670 expr
.value
= build_unary_op (op_loc
,
6671 POSTDECREMENT_EXPR
, expr
.value
, 0);
6672 expr
.original_code
= ERROR_MARK
;
6673 expr
.original_type
= NULL
;
6681 /* Parse an expression (C90 6.3.17, C99 6.5.17).
6684 assignment-expression
6685 expression , assignment-expression
6688 static struct c_expr
6689 c_parser_expression (c_parser
*parser
)
6692 expr
= c_parser_expr_no_commas (parser
, NULL
);
6693 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6697 location_t loc
= c_parser_peek_token (parser
)->location
;
6698 location_t expr_loc
;
6699 c_parser_consume_token (parser
);
6700 expr_loc
= c_parser_peek_token (parser
)->location
;
6701 lhsval
= expr
.value
;
6702 while (TREE_CODE (lhsval
) == COMPOUND_EXPR
)
6703 lhsval
= TREE_OPERAND (lhsval
, 1);
6704 if (DECL_P (lhsval
) || handled_component_p (lhsval
))
6705 mark_exp_read (lhsval
);
6706 next
= c_parser_expr_no_commas (parser
, NULL
);
6707 next
= default_function_array_conversion (expr_loc
, next
);
6708 expr
.value
= build_compound_expr (loc
, expr
.value
, next
.value
);
6709 expr
.original_code
= COMPOUND_EXPR
;
6710 expr
.original_type
= next
.original_type
;
6715 /* Parse an expression and convert functions or arrays to
6718 static struct c_expr
6719 c_parser_expression_conv (c_parser
*parser
)
6722 location_t loc
= c_parser_peek_token (parser
)->location
;
6723 expr
= c_parser_expression (parser
);
6724 expr
= default_function_array_conversion (loc
, expr
);
6728 /* Parse a non-empty list of expressions. If CONVERT_P, convert
6729 functions and arrays to pointers. If FOLD_P, fold the expressions.
6732 assignment-expression
6733 nonempty-expr-list , assignment-expression
6736 static VEC(tree
,gc
) *
6737 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
,
6738 VEC(tree
,gc
) **p_orig_types
)
6741 VEC(tree
,gc
) *orig_types
;
6743 location_t loc
= c_parser_peek_token (parser
)->location
;
6745 ret
= make_tree_vector ();
6746 if (p_orig_types
== NULL
)
6749 orig_types
= make_tree_vector ();
6751 expr
= c_parser_expr_no_commas (parser
, NULL
);
6753 expr
= default_function_array_read_conversion (loc
, expr
);
6755 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6756 VEC_quick_push (tree
, ret
, expr
.value
);
6757 if (orig_types
!= NULL
)
6758 VEC_quick_push (tree
, orig_types
, expr
.original_type
);
6759 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6761 c_parser_consume_token (parser
);
6762 loc
= c_parser_peek_token (parser
)->location
;
6763 expr
= c_parser_expr_no_commas (parser
, NULL
);
6765 expr
= default_function_array_read_conversion (loc
, expr
);
6767 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
6768 VEC_safe_push (tree
, gc
, ret
, expr
.value
);
6769 if (orig_types
!= NULL
)
6770 VEC_safe_push (tree
, gc
, orig_types
, expr
.original_type
);
6772 if (orig_types
!= NULL
)
6773 *p_orig_types
= orig_types
;
6777 /* Parse Objective-C-specific constructs. */
6779 /* Parse an objc-class-definition.
6781 objc-class-definition:
6782 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
6783 objc-class-instance-variables[opt] objc-methodprotolist @end
6784 @implementation identifier objc-superclass[opt]
6785 objc-class-instance-variables[opt]
6786 @interface identifier ( identifier ) objc-protocol-refs[opt]
6787 objc-methodprotolist @end
6788 @interface identifier ( ) objc-protocol-refs[opt]
6789 objc-methodprotolist @end
6790 @implementation identifier ( identifier )
6795 "@interface identifier (" must start "@interface identifier (
6796 identifier ) ...": objc-methodprotolist in the first production may
6797 not start with a parenthesized identifier as a declarator of a data
6798 definition with no declaration specifiers if the objc-superclass,
6799 objc-protocol-refs and objc-class-instance-variables are omitted. */
6802 c_parser_objc_class_definition (c_parser
*parser
, tree attributes
)
6807 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
6809 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
6814 c_parser_consume_token (parser
);
6815 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6817 c_parser_error (parser
, "expected identifier");
6820 id1
= c_parser_peek_token (parser
)->value
;
6821 c_parser_consume_token (parser
);
6822 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6824 /* We have a category or class extension. */
6826 tree proto
= NULL_TREE
;
6827 c_parser_consume_token (parser
);
6828 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6830 if (iface_p
&& c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
6832 /* We have a class extension. */
6837 c_parser_error (parser
, "expected identifier or %<)%>");
6838 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6844 id2
= c_parser_peek_token (parser
)->value
;
6845 c_parser_consume_token (parser
);
6847 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6850 objc_start_category_implementation (id1
, id2
);
6853 if (c_parser_next_token_is (parser
, CPP_LESS
))
6854 proto
= c_parser_objc_protocol_refs (parser
);
6855 objc_start_category_interface (id1
, id2
, proto
, attributes
);
6856 c_parser_objc_methodprotolist (parser
);
6857 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6858 objc_finish_interface ();
6861 if (c_parser_next_token_is (parser
, CPP_COLON
))
6863 c_parser_consume_token (parser
);
6864 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6866 c_parser_error (parser
, "expected identifier");
6869 superclass
= c_parser_peek_token (parser
)->value
;
6870 c_parser_consume_token (parser
);
6873 superclass
= NULL_TREE
;
6876 tree proto
= NULL_TREE
;
6877 if (c_parser_next_token_is (parser
, CPP_LESS
))
6878 proto
= c_parser_objc_protocol_refs (parser
);
6879 objc_start_class_interface (id1
, superclass
, proto
, attributes
);
6882 objc_start_class_implementation (id1
, superclass
);
6883 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6884 c_parser_objc_class_instance_variables (parser
);
6887 objc_continue_interface ();
6888 c_parser_objc_methodprotolist (parser
);
6889 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6890 objc_finish_interface ();
6894 objc_continue_implementation ();
6899 /* Parse objc-class-instance-variables.
6901 objc-class-instance-variables:
6902 { objc-instance-variable-decl-list[opt] }
6904 objc-instance-variable-decl-list:
6905 objc-visibility-spec
6906 objc-instance-variable-decl ;
6908 objc-instance-variable-decl-list objc-visibility-spec
6909 objc-instance-variable-decl-list objc-instance-variable-decl ;
6910 objc-instance-variable-decl-list ;
6912 objc-visibility-spec:
6917 objc-instance-variable-decl:
6922 c_parser_objc_class_instance_variables (c_parser
*parser
)
6924 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
6925 c_parser_consume_token (parser
);
6926 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
6929 /* Parse any stray semicolon. */
6930 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6932 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6933 "extra semicolon in struct or union specified");
6934 c_parser_consume_token (parser
);
6937 /* Stop if at the end of the instance variables. */
6938 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
6940 c_parser_consume_token (parser
);
6943 /* Parse any objc-visibility-spec. */
6944 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
6946 c_parser_consume_token (parser
);
6947 objc_set_visibility (OBJC_IVAR_VIS_PRIVATE
);
6950 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
6952 c_parser_consume_token (parser
);
6953 objc_set_visibility (OBJC_IVAR_VIS_PROTECTED
);
6956 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
6958 c_parser_consume_token (parser
);
6959 objc_set_visibility (OBJC_IVAR_VIS_PUBLIC
);
6962 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PACKAGE
))
6964 c_parser_consume_token (parser
);
6965 objc_set_visibility (OBJC_IVAR_VIS_PACKAGE
);
6968 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
6970 c_parser_pragma (parser
, pragma_external
);
6974 /* Parse some comma-separated declarations. */
6975 decls
= c_parser_struct_declaration (parser
);
6977 /* Comma-separated instance variables are chained together in
6978 reverse order; add them one by one. */
6979 tree ivar
= nreverse (decls
);
6980 for (; ivar
; ivar
= DECL_CHAIN (ivar
))
6981 objc_add_instance_variable (copy_node (ivar
));
6983 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6987 /* Parse an objc-class-declaration.
6989 objc-class-declaration:
6990 @class identifier-list ;
6994 c_parser_objc_class_declaration (c_parser
*parser
)
6996 tree list
= NULL_TREE
;
6997 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
6998 c_parser_consume_token (parser
);
6999 /* Any identifiers, including those declared as type names, are OK
7004 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7006 c_parser_error (parser
, "expected identifier");
7007 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7008 parser
->error
= false;
7011 id
= c_parser_peek_token (parser
)->value
;
7012 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7013 c_parser_consume_token (parser
);
7014 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7015 c_parser_consume_token (parser
);
7019 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7020 objc_declare_class (list
);
7023 /* Parse an objc-alias-declaration.
7025 objc-alias-declaration:
7026 @compatibility_alias identifier identifier ;
7030 c_parser_objc_alias_declaration (c_parser
*parser
)
7033 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
7034 c_parser_consume_token (parser
);
7035 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7037 c_parser_error (parser
, "expected identifier");
7038 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7041 id1
= c_parser_peek_token (parser
)->value
;
7042 c_parser_consume_token (parser
);
7043 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7045 c_parser_error (parser
, "expected identifier");
7046 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
7049 id2
= c_parser_peek_token (parser
)->value
;
7050 c_parser_consume_token (parser
);
7051 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7052 objc_declare_alias (id1
, id2
);
7055 /* Parse an objc-protocol-definition.
7057 objc-protocol-definition:
7058 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
7059 @protocol identifier-list ;
7061 "@protocol identifier ;" should be resolved as "@protocol
7062 identifier-list ;": objc-methodprotolist may not start with a
7063 semicolon in the first alternative if objc-protocol-refs are
7067 c_parser_objc_protocol_definition (c_parser
*parser
, tree attributes
)
7069 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
7071 c_parser_consume_token (parser
);
7072 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7074 c_parser_error (parser
, "expected identifier");
7077 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
7078 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
7080 tree list
= NULL_TREE
;
7081 /* Any identifiers, including those declared as type names, are
7086 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7088 c_parser_error (parser
, "expected identifier");
7091 id
= c_parser_peek_token (parser
)->value
;
7092 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7093 c_parser_consume_token (parser
);
7094 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7095 c_parser_consume_token (parser
);
7099 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7100 objc_declare_protocols (list
, attributes
);
7104 tree id
= c_parser_peek_token (parser
)->value
;
7105 tree proto
= NULL_TREE
;
7106 c_parser_consume_token (parser
);
7107 if (c_parser_next_token_is (parser
, CPP_LESS
))
7108 proto
= c_parser_objc_protocol_refs (parser
);
7109 parser
->objc_pq_context
= true;
7110 objc_start_protocol (id
, proto
, attributes
);
7111 c_parser_objc_methodprotolist (parser
);
7112 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
7113 parser
->objc_pq_context
= false;
7114 objc_finish_interface ();
7118 /* Parse an objc-method-type.
7124 Return true if it is a class method (+) and false if it is
7125 an instance method (-).
7128 c_parser_objc_method_type (c_parser
*parser
)
7130 switch (c_parser_peek_token (parser
)->type
)
7133 c_parser_consume_token (parser
);
7136 c_parser_consume_token (parser
);
7143 /* Parse an objc-method-definition.
7145 objc-method-definition:
7146 objc-method-type objc-method-decl ;[opt] compound-statement
7150 c_parser_objc_method_definition (c_parser
*parser
)
7152 bool is_class_method
= c_parser_objc_method_type (parser
);
7153 tree decl
, attributes
= NULL_TREE
;
7154 parser
->objc_pq_context
= true;
7155 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
);
7156 if (decl
== error_mark_node
)
7157 return; /* Bail here. */
7159 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7161 c_parser_consume_token (parser
);
7162 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7163 "extra semicolon in method definition specified");
7166 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7168 c_parser_error (parser
, "expected %<{%>");
7172 parser
->objc_pq_context
= false;
7173 if (objc_start_method_definition (is_class_method
, decl
, attributes
))
7175 add_stmt (c_parser_compound_statement (parser
));
7176 objc_finish_method_definition (current_function_decl
);
7180 /* This code is executed when we find a method definition
7181 outside of an @implementation context (or invalid for other
7182 reasons). Parse the method (to keep going) but do not emit
7185 c_parser_compound_statement (parser
);
7189 /* Parse an objc-methodprotolist.
7191 objc-methodprotolist:
7193 objc-methodprotolist objc-methodproto
7194 objc-methodprotolist declaration
7195 objc-methodprotolist ;
7199 The declaration is a data definition, which may be missing
7200 declaration specifiers under the same rules and diagnostics as
7201 other data definitions outside functions, and the stray semicolon
7202 is diagnosed the same way as a stray semicolon outside a
7206 c_parser_objc_methodprotolist (c_parser
*parser
)
7210 /* The list is terminated by @end. */
7211 switch (c_parser_peek_token (parser
)->type
)
7214 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
7215 "ISO C does not allow extra %<;%> outside of a function");
7216 c_parser_consume_token (parser
);
7220 c_parser_objc_methodproto (parser
);
7223 c_parser_pragma (parser
, pragma_external
);
7228 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
7230 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
))
7231 c_parser_objc_at_property_declaration (parser
);
7232 else if (c_parser_next_token_is_keyword (parser
, RID_AT_OPTIONAL
))
7234 objc_set_method_opt (true);
7235 c_parser_consume_token (parser
);
7237 else if (c_parser_next_token_is_keyword (parser
, RID_AT_REQUIRED
))
7239 objc_set_method_opt (false);
7240 c_parser_consume_token (parser
);
7243 c_parser_declaration_or_fndef (parser
, false, false, true,
7250 /* Parse an objc-methodproto.
7253 objc-method-type objc-method-decl ;
7257 c_parser_objc_methodproto (c_parser
*parser
)
7259 bool is_class_method
= c_parser_objc_method_type (parser
);
7260 tree decl
, attributes
= NULL_TREE
;
7262 /* Remember protocol qualifiers in prototypes. */
7263 parser
->objc_pq_context
= true;
7264 decl
= c_parser_objc_method_decl (parser
, is_class_method
, &attributes
);
7265 /* Forget protocol qualifiers now. */
7266 parser
->objc_pq_context
= false;
7268 /* Do not allow the presence of attributes to hide an erroneous
7269 method implementation in the interface section. */
7270 if (!c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7272 c_parser_error (parser
, "expected %<;%>");
7276 if (decl
!= error_mark_node
)
7277 objc_add_method_declaration (is_class_method
, decl
, attributes
);
7279 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7282 /* If we are at a position that method attributes may be present, check that
7283 there are not any parsed already (a syntax error) and then collect any
7284 specified at the current location. Finally, if new attributes were present,
7285 check that the next token is legal ( ';' for decls and '{' for defs). */
7288 c_parser_objc_maybe_method_attributes (c_parser
* parser
, tree
* attributes
)
7293 c_parser_error (parser
,
7294 "method attributes must be specified at the end only");
7295 *attributes
= NULL_TREE
;
7299 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7300 *attributes
= c_parser_attributes (parser
);
7302 /* If there were no attributes here, just report any earlier error. */
7303 if (*attributes
== NULL_TREE
|| bad
)
7306 /* If the attributes are followed by a ; or {, then just report any earlier
7308 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
7309 || c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7312 /* We've got attributes, but not at the end. */
7313 c_parser_error (parser
,
7314 "expected %<;%> or %<{%> after method attribute definition");
7318 /* Parse an objc-method-decl.
7321 ( objc-type-name ) objc-selector
7323 ( objc-type-name ) objc-keyword-selector objc-optparmlist
7324 objc-keyword-selector objc-optparmlist
7327 objc-keyword-selector:
7329 objc-keyword-selector objc-keyword-decl
7332 objc-selector : ( objc-type-name ) identifier
7333 objc-selector : identifier
7334 : ( objc-type-name ) identifier
7338 objc-optparms objc-optellipsis
7342 objc-opt-parms , parameter-declaration
7350 c_parser_objc_method_decl (c_parser
*parser
, bool is_class_method
, tree
*attributes
)
7352 tree type
= NULL_TREE
;
7354 tree parms
= NULL_TREE
;
7355 bool ellipsis
= false;
7356 bool attr_err
= false;
7358 *attributes
= NULL_TREE
;
7359 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7361 c_parser_consume_token (parser
);
7362 type
= c_parser_objc_type_name (parser
);
7363 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7365 sel
= c_parser_objc_selector (parser
);
7366 /* If there is no selector, or a colon follows, we have an
7367 objc-keyword-selector. If there is a selector, and a colon does
7368 not follow, that selector ends the objc-method-decl. */
7369 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
7372 tree list
= NULL_TREE
;
7375 tree atype
= NULL_TREE
, id
, keyworddecl
;
7376 tree param_attr
= NULL_TREE
;
7377 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7379 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7381 c_parser_consume_token (parser
);
7382 atype
= c_parser_objc_type_name (parser
);
7383 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7386 /* New ObjC allows attributes on method parameters. */
7387 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
7388 param_attr
= c_parser_attributes (parser
);
7389 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7391 c_parser_error (parser
, "expected identifier");
7392 return error_mark_node
;
7394 id
= c_parser_peek_token (parser
)->value
;
7395 c_parser_consume_token (parser
);
7396 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
, param_attr
);
7397 list
= chainon (list
, keyworddecl
);
7398 tsel
= c_parser_objc_selector (parser
);
7399 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7403 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7405 /* Parse the optional parameter list. Optional Objective-C
7406 method parameters follow the C syntax, and may include '...'
7407 to denote a variable number of arguments. */
7408 parms
= make_node (TREE_LIST
);
7409 while (c_parser_next_token_is (parser
, CPP_COMMA
))
7411 struct c_parm
*parm
;
7412 c_parser_consume_token (parser
);
7413 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7416 c_parser_consume_token (parser
);
7417 attr_err
|= c_parser_objc_maybe_method_attributes
7418 (parser
, attributes
) ;
7421 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7424 parms
= chainon (parms
,
7425 build_tree_list (NULL_TREE
, grokparm (parm
)));
7430 attr_err
|= c_parser_objc_maybe_method_attributes (parser
, attributes
) ;
7434 c_parser_error (parser
, "objective-c method declaration is expected");
7435 return error_mark_node
;
7439 return error_mark_node
;
7441 return objc_build_method_signature (is_class_method
, type
, sel
, parms
, ellipsis
);
7444 /* Parse an objc-type-name.
7447 objc-type-qualifiers[opt] type-name
7448 objc-type-qualifiers[opt]
7450 objc-type-qualifiers:
7452 objc-type-qualifiers objc-type-qualifier
7454 objc-type-qualifier: one of
7455 in out inout bycopy byref oneway
7459 c_parser_objc_type_name (c_parser
*parser
)
7461 tree quals
= NULL_TREE
;
7462 struct c_type_name
*type_name
= NULL
;
7463 tree type
= NULL_TREE
;
7466 c_token
*token
= c_parser_peek_token (parser
);
7467 if (token
->type
== CPP_KEYWORD
7468 && (token
->keyword
== RID_IN
7469 || token
->keyword
== RID_OUT
7470 || token
->keyword
== RID_INOUT
7471 || token
->keyword
== RID_BYCOPY
7472 || token
->keyword
== RID_BYREF
7473 || token
->keyword
== RID_ONEWAY
))
7475 quals
= chainon (build_tree_list (NULL_TREE
, token
->value
), quals
);
7476 c_parser_consume_token (parser
);
7481 if (c_parser_next_tokens_start_typename (parser
, cla_prefer_type
))
7482 type_name
= c_parser_type_name (parser
);
7484 type
= groktypename (type_name
, NULL
, NULL
);
7486 /* If the type is unknown, and error has already been produced and
7487 we need to recover from the error. In that case, use NULL_TREE
7488 for the type, as if no type had been specified; this will use the
7489 default type ('id') which is good for error recovery. */
7490 if (type
== error_mark_node
)
7493 return build_tree_list (quals
, type
);
7496 /* Parse objc-protocol-refs.
7503 c_parser_objc_protocol_refs (c_parser
*parser
)
7505 tree list
= NULL_TREE
;
7506 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
7507 c_parser_consume_token (parser
);
7508 /* Any identifiers, including those declared as type names, are OK
7513 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7515 c_parser_error (parser
, "expected identifier");
7518 id
= c_parser_peek_token (parser
)->value
;
7519 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
7520 c_parser_consume_token (parser
);
7521 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7522 c_parser_consume_token (parser
);
7526 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
7530 /* Parse an objc-try-catch-finally-statement.
7532 objc-try-catch-finally-statement:
7533 @try compound-statement objc-catch-list[opt]
7534 @try compound-statement objc-catch-list[opt] @finally compound-statement
7537 @catch ( objc-catch-parameter-declaration ) compound-statement
7538 objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
7540 objc-catch-parameter-declaration:
7541 parameter-declaration
7544 where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
7546 PS: This function is identical to cp_parser_objc_try_catch_finally_statement
7547 for C++. Keep them in sync. */
7550 c_parser_objc_try_catch_finally_statement (c_parser
*parser
)
7552 location_t location
;
7555 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
7556 c_parser_consume_token (parser
);
7557 location
= c_parser_peek_token (parser
)->location
;
7558 objc_maybe_warn_exceptions (location
);
7559 stmt
= c_parser_compound_statement (parser
);
7560 objc_begin_try_stmt (location
, stmt
);
7562 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
7564 struct c_parm
*parm
;
7565 tree parameter_declaration
= error_mark_node
;
7566 bool seen_open_paren
= false;
7568 c_parser_consume_token (parser
);
7569 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7570 seen_open_paren
= true;
7571 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
7573 /* We have "@catch (...)" (where the '...' are literally
7574 what is in the code). Skip the '...'.
7575 parameter_declaration is set to NULL_TREE, and
7576 objc_being_catch_clauses() knows that that means
7578 c_parser_consume_token (parser
);
7579 parameter_declaration
= NULL_TREE
;
7583 /* We have "@catch (NSException *exception)" or something
7584 like that. Parse the parameter declaration. */
7585 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
7587 parameter_declaration
= error_mark_node
;
7589 parameter_declaration
= grokparm (parm
);
7591 if (seen_open_paren
)
7592 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7595 /* If there was no open parenthesis, we are recovering from
7596 an error, and we are trying to figure out what mistake
7597 the user has made. */
7599 /* If there is an immediate closing parenthesis, the user
7600 probably forgot the opening one (ie, they typed "@catch
7601 NSException *e)". Parse the closing parenthesis and keep
7603 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
7604 c_parser_consume_token (parser
);
7606 /* If these is no immediate closing parenthesis, the user
7607 probably doesn't know that parenthesis are required at
7608 all (ie, they typed "@catch NSException *e"). So, just
7609 forget about the closing parenthesis and keep going. */
7611 objc_begin_catch_clause (parameter_declaration
);
7612 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7613 c_parser_compound_statement_nostart (parser
);
7614 objc_finish_catch_clause ();
7616 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
7618 c_parser_consume_token (parser
);
7619 location
= c_parser_peek_token (parser
)->location
;
7620 stmt
= c_parser_compound_statement (parser
);
7621 objc_build_finally_clause (location
, stmt
);
7623 objc_finish_try_stmt ();
7626 /* Parse an objc-synchronized-statement.
7628 objc-synchronized-statement:
7629 @synchronized ( expression ) compound-statement
7633 c_parser_objc_synchronized_statement (c_parser
*parser
)
7637 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
7638 c_parser_consume_token (parser
);
7639 loc
= c_parser_peek_token (parser
)->location
;
7640 objc_maybe_warn_exceptions (loc
);
7641 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7643 expr
= c_parser_expression (parser
).value
;
7644 expr
= c_fully_fold (expr
, false, NULL
);
7645 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7648 expr
= error_mark_node
;
7649 stmt
= c_parser_compound_statement (parser
);
7650 objc_build_synchronized (loc
, expr
, stmt
);
7653 /* Parse an objc-selector; return NULL_TREE without an error if the
7654 next token is not an objc-selector.
7659 enum struct union if else while do for switch case default
7660 break continue return goto asm sizeof typeof __alignof
7661 unsigned long const short volatile signed restrict _Complex
7662 in out inout bycopy byref oneway int char float double void _Bool
7664 ??? Why this selection of keywords but not, for example, storage
7665 class specifiers? */
7668 c_parser_objc_selector (c_parser
*parser
)
7670 c_token
*token
= c_parser_peek_token (parser
);
7671 tree value
= token
->value
;
7672 if (token
->type
== CPP_NAME
)
7674 c_parser_consume_token (parser
);
7677 if (token
->type
!= CPP_KEYWORD
)
7679 switch (token
->keyword
)
7721 c_parser_consume_token (parser
);
7728 /* Parse an objc-selector-arg.
7732 objc-keywordname-list
7734 objc-keywordname-list:
7736 objc-keywordname-list objc-keywordname
7744 c_parser_objc_selector_arg (c_parser
*parser
)
7746 tree sel
= c_parser_objc_selector (parser
);
7747 tree list
= NULL_TREE
;
7748 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7752 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7754 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
7755 sel
= c_parser_objc_selector (parser
);
7756 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7762 /* Parse an objc-receiver.
7771 c_parser_objc_receiver (c_parser
*parser
)
7773 if (c_parser_peek_token (parser
)->type
== CPP_NAME
7774 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
7775 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
7777 tree id
= c_parser_peek_token (parser
)->value
;
7778 c_parser_consume_token (parser
);
7779 return objc_get_class_reference (id
);
7781 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
7784 /* Parse objc-message-args.
7788 objc-keywordarg-list
7790 objc-keywordarg-list:
7792 objc-keywordarg-list objc-keywordarg
7795 objc-selector : objc-keywordexpr
7800 c_parser_objc_message_args (c_parser
*parser
)
7802 tree sel
= c_parser_objc_selector (parser
);
7803 tree list
= NULL_TREE
;
7804 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7809 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7810 return error_mark_node
;
7811 keywordexpr
= c_parser_objc_keywordexpr (parser
);
7812 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
7813 sel
= c_parser_objc_selector (parser
);
7814 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
7820 /* Parse an objc-keywordexpr.
7827 c_parser_objc_keywordexpr (c_parser
*parser
)
7830 VEC(tree
,gc
) *expr_list
= c_parser_expr_list (parser
, true, true, NULL
);
7831 if (VEC_length (tree
, expr_list
) == 1)
7833 /* Just return the expression, remove a level of
7835 ret
= VEC_index (tree
, expr_list
, 0);
7839 /* We have a comma expression, we will collapse later. */
7840 ret
= build_tree_list_vec (expr_list
);
7842 release_tree_vector (expr_list
);
7846 /* A check, needed in several places, that ObjC interface, implementation or
7847 method definitions are not prefixed by incorrect items. */
7849 c_parser_objc_diagnose_bad_element_prefix (c_parser
*parser
,
7850 struct c_declspecs
*specs
)
7852 if (!specs
->declspecs_seen_p
|| specs
->non_sc_seen_p
7853 || specs
->typespec_kind
!= ctsk_none
)
7855 c_parser_error (parser
,
7856 "no type or storage class may be specified here,");
7857 c_parser_skip_to_end_of_block_or_statement (parser
);
7863 /* Parse an Objective-C @property declaration. The syntax is:
7865 objc-property-declaration:
7866 '@property' objc-property-attributes[opt] struct-declaration ;
7868 objc-property-attributes:
7869 '(' objc-property-attribute-list ')'
7871 objc-property-attribute-list:
7872 objc-property-attribute
7873 objc-property-attribute-list, objc-property-attribute
7875 objc-property-attribute
7876 'getter' = identifier
7877 'setter' = identifier
7886 @property NSString *name;
7887 @property (readonly) id object;
7888 @property (retain, nonatomic, getter=getTheName) id name;
7889 @property int a, b, c;
7891 PS: This function is identical to cp_parser_objc_at_propery_declaration
7892 for C++. Keep them in sync. */
7894 c_parser_objc_at_property_declaration (c_parser
*parser
)
7896 /* The following variables hold the attributes of the properties as
7897 parsed. They are 'false' or 'NULL_TREE' if the attribute was not
7898 seen. When we see an attribute, we set them to 'true' (if they
7899 are boolean properties) or to the identifier (if they have an
7900 argument, ie, for getter and setter). Note that here we only
7901 parse the list of attributes, check the syntax and accumulate the
7902 attributes that we find. objc_add_property_declaration() will
7903 then process the information. */
7904 bool property_assign
= false;
7905 bool property_copy
= false;
7906 tree property_getter_ident
= NULL_TREE
;
7907 bool property_nonatomic
= false;
7908 bool property_readonly
= false;
7909 bool property_readwrite
= false;
7910 bool property_retain
= false;
7911 tree property_setter_ident
= NULL_TREE
;
7913 /* 'properties' is the list of properties that we read. Usually a
7914 single one, but maybe more (eg, in "@property int a, b, c;" there
7919 loc
= c_parser_peek_token (parser
)->location
;
7920 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROPERTY
));
7922 c_parser_consume_token (parser
); /* Eat '@property'. */
7924 /* Parse the optional attribute list... */
7925 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7928 c_parser_consume_token (parser
);
7930 /* Property attribute keywords are valid now. */
7931 parser
->objc_property_attr_context
= true;
7935 bool syntax_error
= false;
7936 c_token
*token
= c_parser_peek_token (parser
);
7939 if (token
->type
!= CPP_KEYWORD
)
7941 if (token
->type
== CPP_CLOSE_PAREN
)
7942 c_parser_error (parser
, "expected identifier");
7945 c_parser_consume_token (parser
);
7946 c_parser_error (parser
, "unknown property attribute");
7950 keyword
= token
->keyword
;
7951 c_parser_consume_token (parser
);
7954 case RID_ASSIGN
: property_assign
= true; break;
7955 case RID_COPY
: property_copy
= true; break;
7956 case RID_NONATOMIC
: property_nonatomic
= true; break;
7957 case RID_READONLY
: property_readonly
= true; break;
7958 case RID_READWRITE
: property_readwrite
= true; break;
7959 case RID_RETAIN
: property_retain
= true; break;
7963 if (c_parser_next_token_is_not (parser
, CPP_EQ
))
7965 c_parser_error (parser
,
7966 "getter/setter attribute must be followed by %<=%>");
7967 syntax_error
= true;
7970 c_parser_consume_token (parser
); /* eat the = */
7971 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
7973 c_parser_error (parser
, "expected identifier");
7974 syntax_error
= true;
7977 if (keyword
== RID_SETTER
)
7979 if (property_setter_ident
!= NULL_TREE
)
7980 c_parser_error (parser
, "the %<setter%> attribute may only be specified once");
7982 property_setter_ident
= c_parser_peek_token (parser
)->value
;
7983 c_parser_consume_token (parser
);
7984 if (c_parser_next_token_is_not (parser
, CPP_COLON
))
7985 c_parser_error (parser
, "setter name must terminate with %<:%>");
7987 c_parser_consume_token (parser
);
7991 if (property_getter_ident
!= NULL_TREE
)
7992 c_parser_error (parser
, "the %<getter%> attribute may only be specified once");
7994 property_getter_ident
= c_parser_peek_token (parser
)->value
;
7995 c_parser_consume_token (parser
);
7999 c_parser_error (parser
, "unknown property attribute");
8000 syntax_error
= true;
8007 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8008 c_parser_consume_token (parser
);
8012 parser
->objc_property_attr_context
= false;
8013 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8015 /* ... and the property declaration(s). */
8016 properties
= c_parser_struct_declaration (parser
);
8018 if (properties
== error_mark_node
)
8020 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8021 parser
->error
= false;
8025 if (properties
== NULL_TREE
)
8026 c_parser_error (parser
, "expected identifier");
8029 /* Comma-separated properties are chained together in
8030 reverse order; add them one by one. */
8031 properties
= nreverse (properties
);
8033 for (; properties
; properties
= TREE_CHAIN (properties
))
8034 objc_add_property_declaration (loc
, copy_node (properties
),
8035 property_readonly
, property_readwrite
,
8036 property_assign
, property_retain
,
8037 property_copy
, property_nonatomic
,
8038 property_getter_ident
, property_setter_ident
);
8041 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8042 parser
->error
= false;
8045 /* Parse an Objective-C @synthesize declaration. The syntax is:
8047 objc-synthesize-declaration:
8048 @synthesize objc-synthesize-identifier-list ;
8050 objc-synthesize-identifier-list:
8051 objc-synthesize-identifier
8052 objc-synthesize-identifier-list, objc-synthesize-identifier
8054 objc-synthesize-identifier
8056 identifier = identifier
8059 @synthesize MyProperty;
8060 @synthesize OneProperty, AnotherProperty=MyIvar, YetAnotherProperty;
8062 PS: This function is identical to cp_parser_objc_at_synthesize_declaration
8063 for C++. Keep them in sync.
8066 c_parser_objc_at_synthesize_declaration (c_parser
*parser
)
8068 tree list
= NULL_TREE
;
8070 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNTHESIZE
));
8071 loc
= c_parser_peek_token (parser
)->location
;
8073 c_parser_consume_token (parser
);
8076 tree property
, ivar
;
8077 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8079 c_parser_error (parser
, "expected identifier");
8080 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8081 /* Once we find the semicolon, we can resume normal parsing.
8082 We have to reset parser->error manually because
8083 c_parser_skip_until_found() won't reset it for us if the
8084 next token is precisely a semicolon. */
8085 parser
->error
= false;
8088 property
= c_parser_peek_token (parser
)->value
;
8089 c_parser_consume_token (parser
);
8090 if (c_parser_next_token_is (parser
, CPP_EQ
))
8092 c_parser_consume_token (parser
);
8093 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8095 c_parser_error (parser
, "expected identifier");
8096 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8097 parser
->error
= false;
8100 ivar
= c_parser_peek_token (parser
)->value
;
8101 c_parser_consume_token (parser
);
8105 list
= chainon (list
, build_tree_list (ivar
, property
));
8106 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8107 c_parser_consume_token (parser
);
8111 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8112 objc_add_synthesize_declaration (loc
, list
);
8115 /* Parse an Objective-C @dynamic declaration. The syntax is:
8117 objc-dynamic-declaration:
8118 @dynamic identifier-list ;
8121 @dynamic MyProperty;
8122 @dynamic MyProperty, AnotherProperty;
8124 PS: This function is identical to cp_parser_objc_at_dynamic_declaration
8125 for C++. Keep them in sync.
8128 c_parser_objc_at_dynamic_declaration (c_parser
*parser
)
8130 tree list
= NULL_TREE
;
8132 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_DYNAMIC
));
8133 loc
= c_parser_peek_token (parser
)->location
;
8135 c_parser_consume_token (parser
);
8139 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
8141 c_parser_error (parser
, "expected identifier");
8142 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
8143 parser
->error
= false;
8146 property
= c_parser_peek_token (parser
)->value
;
8147 list
= chainon (list
, build_tree_list (NULL_TREE
, property
));
8148 c_parser_consume_token (parser
);
8149 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8150 c_parser_consume_token (parser
);
8154 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
8155 objc_add_dynamic_declaration (loc
, list
);
8159 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
8160 should be considered, statements. ALLOW_STMT is true if we're within
8161 the context of a function and such pragmas are to be allowed. Returns
8162 true if we actually parsed such a pragma. */
8165 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
8169 id
= c_parser_peek_token (parser
)->pragma_kind
;
8170 gcc_assert (id
!= PRAGMA_NONE
);
8174 case PRAGMA_OMP_BARRIER
:
8175 if (context
!= pragma_compound
)
8177 if (context
== pragma_stmt
)
8178 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
8179 "used in compound statements");
8182 c_parser_omp_barrier (parser
);
8185 case PRAGMA_OMP_FLUSH
:
8186 if (context
!= pragma_compound
)
8188 if (context
== pragma_stmt
)
8189 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
8190 "used in compound statements");
8193 c_parser_omp_flush (parser
);
8196 case PRAGMA_OMP_TASKWAIT
:
8197 if (context
!= pragma_compound
)
8199 if (context
== pragma_stmt
)
8200 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
8201 "used in compound statements");
8204 c_parser_omp_taskwait (parser
);
8207 case PRAGMA_OMP_THREADPRIVATE
:
8208 c_parser_omp_threadprivate (parser
);
8211 case PRAGMA_OMP_SECTION
:
8212 error_at (c_parser_peek_token (parser
)->location
,
8213 "%<#pragma omp section%> may only be used in "
8214 "%<#pragma omp sections%> construct");
8215 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8218 case PRAGMA_GCC_PCH_PREPROCESS
:
8219 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
8220 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8224 if (id
< PRAGMA_FIRST_EXTERNAL
)
8226 if (context
== pragma_external
)
8229 c_parser_error (parser
, "expected declaration specifiers");
8230 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
8233 c_parser_omp_construct (parser
);
8239 c_parser_consume_pragma (parser
);
8240 c_invoke_pragma_handler (id
);
8242 /* Skip to EOL, but suppress any error message. Those will have been
8243 generated by the handler routine through calling error, as opposed
8244 to calling c_parser_error. */
8245 parser
->error
= true;
8246 c_parser_skip_to_pragma_eol (parser
);
8251 /* The interface the pragma parsers have to the lexer. */
8254 pragma_lex (tree
*value
)
8256 c_token
*tok
= c_parser_peek_token (the_parser
);
8257 enum cpp_ttype ret
= tok
->type
;
8259 *value
= tok
->value
;
8260 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
8264 if (ret
== CPP_KEYWORD
)
8266 c_parser_consume_token (the_parser
);
8273 c_parser_pragma_pch_preprocess (c_parser
*parser
)
8277 c_parser_consume_pragma (parser
);
8278 if (c_parser_next_token_is (parser
, CPP_STRING
))
8280 name
= c_parser_peek_token (parser
)->value
;
8281 c_parser_consume_token (parser
);
8284 c_parser_error (parser
, "expected string literal");
8285 c_parser_skip_to_pragma_eol (parser
);
8288 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
8291 /* OpenMP 2.5 parsing routines. */
8293 /* Returns name of the next clause.
8294 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
8295 the token is not consumed. Otherwise appropriate pragma_omp_clause is
8296 returned and the token is consumed. */
8298 static pragma_omp_clause
8299 c_parser_omp_clause_name (c_parser
*parser
)
8301 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
8303 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
8304 result
= PRAGMA_OMP_CLAUSE_IF
;
8305 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
8306 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
8307 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8309 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8314 if (!strcmp ("collapse", p
))
8315 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
8316 else if (!strcmp ("copyin", p
))
8317 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
8318 else if (!strcmp ("copyprivate", p
))
8319 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
8322 if (!strcmp ("firstprivate", p
))
8323 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
8326 if (!strcmp ("lastprivate", p
))
8327 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
8330 if (!strcmp ("nowait", p
))
8331 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
8332 else if (!strcmp ("num_threads", p
))
8333 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
8336 if (!strcmp ("ordered", p
))
8337 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
8340 if (!strcmp ("private", p
))
8341 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
8344 if (!strcmp ("reduction", p
))
8345 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
8348 if (!strcmp ("schedule", p
))
8349 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
8350 else if (!strcmp ("shared", p
))
8351 result
= PRAGMA_OMP_CLAUSE_SHARED
;
8354 if (!strcmp ("untied", p
))
8355 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
8360 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
8361 c_parser_consume_token (parser
);
8366 /* Validate that a clause of the given type does not already exist. */
8369 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
8374 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
8375 if (OMP_CLAUSE_CODE (c
) == code
)
8377 location_t loc
= OMP_CLAUSE_LOCATION (c
);
8378 error_at (loc
, "too many %qs clauses", name
);
8386 variable-list , identifier
8388 If KIND is nonzero, create the appropriate node and install the
8389 decl in OMP_CLAUSE_DECL and add the node to the head of the list.
8390 If KIND is nonzero, CLAUSE_LOC is the location of the clause.
8392 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
8393 return the list created. */
8396 c_parser_omp_variable_list (c_parser
*parser
,
8397 location_t clause_loc
,
8398 enum omp_clause_code kind
,
8401 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
8402 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
8403 c_parser_error (parser
, "expected identifier");
8405 while (c_parser_next_token_is (parser
, CPP_NAME
)
8406 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
8408 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
8411 undeclared_variable (c_parser_peek_token (parser
)->location
,
8412 c_parser_peek_token (parser
)->value
);
8413 else if (t
== error_mark_node
)
8417 tree u
= build_omp_clause (clause_loc
, kind
);
8418 OMP_CLAUSE_DECL (u
) = t
;
8419 OMP_CLAUSE_CHAIN (u
) = list
;
8423 list
= tree_cons (t
, NULL_TREE
, list
);
8425 c_parser_consume_token (parser
);
8427 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
8430 c_parser_consume_token (parser
);
8436 /* Similarly, but expect leading and trailing parenthesis. This is a very
8437 common case for omp clauses. */
8440 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
8443 /* The clauses location. */
8444 location_t loc
= c_parser_peek_token (parser
)->location
;
8446 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8448 list
= c_parser_omp_variable_list (parser
, loc
, kind
, list
);
8449 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8455 collapse ( constant-expression ) */
8458 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
8460 tree c
, num
= error_mark_node
;
8464 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
8466 loc
= c_parser_peek_token (parser
)->location
;
8467 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8469 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
8470 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8472 if (num
== error_mark_node
)
8474 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
8475 || !host_integerp (num
, 0)
8476 || (n
= tree_low_cst (num
, 0)) <= 0
8480 "collapse argument needs positive constant integer expression");
8483 c
= build_omp_clause (loc
, OMP_CLAUSE_COLLAPSE
);
8484 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
8485 OMP_CLAUSE_CHAIN (c
) = list
;
8490 copyin ( variable-list ) */
8493 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
8495 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
8499 copyprivate ( variable-list ) */
8502 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
8504 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
8508 default ( shared | none ) */
8511 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
8513 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
8514 location_t loc
= c_parser_peek_token (parser
)->location
;
8517 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8519 if (c_parser_next_token_is (parser
, CPP_NAME
))
8521 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8526 if (strcmp ("none", p
) != 0)
8528 kind
= OMP_CLAUSE_DEFAULT_NONE
;
8532 if (strcmp ("shared", p
) != 0)
8534 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
8541 c_parser_consume_token (parser
);
8546 c_parser_error (parser
, "expected %<none%> or %<shared%>");
8548 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8550 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
8553 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
8554 c
= build_omp_clause (loc
, OMP_CLAUSE_DEFAULT
);
8555 OMP_CLAUSE_CHAIN (c
) = list
;
8556 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
8562 firstprivate ( variable-list ) */
8565 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
8567 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
8571 if ( expression ) */
8574 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
8576 location_t loc
= c_parser_peek_token (parser
)->location
;
8577 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
8579 tree t
= c_parser_paren_condition (parser
);
8582 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
8584 c
= build_omp_clause (loc
, OMP_CLAUSE_IF
);
8585 OMP_CLAUSE_IF_EXPR (c
) = t
;
8586 OMP_CLAUSE_CHAIN (c
) = list
;
8590 c_parser_error (parser
, "expected %<(%>");
8596 lastprivate ( variable-list ) */
8599 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
8601 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
8608 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8611 location_t loc
= c_parser_peek_token (parser
)->location
;
8613 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
8615 c
= build_omp_clause (loc
, OMP_CLAUSE_NOWAIT
);
8616 OMP_CLAUSE_CHAIN (c
) = list
;
8621 num_threads ( expression ) */
8624 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
8626 location_t num_threads_loc
= c_parser_peek_token (parser
)->location
;
8627 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8629 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
8630 tree c
, t
= c_parser_expression (parser
).value
;
8631 t
= c_fully_fold (t
, false, NULL
);
8633 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8635 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
8637 c_parser_error (parser
, "expected integer expression");
8641 /* Attempt to statically determine when the number isn't positive. */
8642 c
= fold_build2_loc (expr_loc
, LE_EXPR
, boolean_type_node
, t
,
8643 build_int_cst (TREE_TYPE (t
), 0));
8644 if (CAN_HAVE_LOCATION_P (c
))
8645 SET_EXPR_LOCATION (c
, expr_loc
);
8646 if (c
== boolean_true_node
)
8648 warning_at (expr_loc
, 0,
8649 "%<num_threads%> value must be positive");
8650 t
= integer_one_node
;
8653 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
8655 c
= build_omp_clause (num_threads_loc
, OMP_CLAUSE_NUM_THREADS
);
8656 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
8657 OMP_CLAUSE_CHAIN (c
) = list
;
8668 c_parser_omp_clause_ordered (c_parser
*parser
, tree list
)
8672 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
8674 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8675 OMP_CLAUSE_ORDERED
);
8676 OMP_CLAUSE_CHAIN (c
) = list
;
8682 private ( variable-list ) */
8685 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
8687 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
8691 reduction ( reduction-operator : variable-list )
8694 One of: + * - & ^ | && || */
8697 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
8699 location_t clause_loc
= c_parser_peek_token (parser
)->location
;
8700 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8702 enum tree_code code
;
8704 switch (c_parser_peek_token (parser
)->type
)
8716 code
= BIT_AND_EXPR
;
8719 code
= BIT_XOR_EXPR
;
8722 code
= BIT_IOR_EXPR
;
8725 code
= TRUTH_ANDIF_EXPR
;
8728 code
= TRUTH_ORIF_EXPR
;
8731 c_parser_error (parser
,
8732 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
8733 "%<^%>, %<|%>, %<&&%>, or %<||%>");
8734 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8737 c_parser_consume_token (parser
);
8738 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
8742 nl
= c_parser_omp_variable_list (parser
, clause_loc
,
8743 OMP_CLAUSE_REDUCTION
, list
);
8744 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
8745 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
8749 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8755 schedule ( schedule-kind )
8756 schedule ( schedule-kind , expression )
8759 static | dynamic | guided | runtime | auto
8763 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
8766 location_t loc
= c_parser_peek_token (parser
)->location
;
8768 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
8771 c
= build_omp_clause (loc
, OMP_CLAUSE_SCHEDULE
);
8773 if (c_parser_next_token_is (parser
, CPP_NAME
))
8775 tree kind
= c_parser_peek_token (parser
)->value
;
8776 const char *p
= IDENTIFIER_POINTER (kind
);
8781 if (strcmp ("dynamic", p
) != 0)
8783 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
8787 if (strcmp ("guided", p
) != 0)
8789 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
8793 if (strcmp ("runtime", p
) != 0)
8795 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
8802 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
8803 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
8804 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
8805 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
8809 c_parser_consume_token (parser
);
8810 if (c_parser_next_token_is (parser
, CPP_COMMA
))
8813 c_parser_consume_token (parser
);
8815 here
= c_parser_peek_token (parser
)->location
;
8816 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
8817 t
= c_fully_fold (t
, false, NULL
);
8819 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
8820 error_at (here
, "schedule %<runtime%> does not take "
8821 "a %<chunk_size%> parameter");
8822 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
8824 "schedule %<auto%> does not take "
8825 "a %<chunk_size%> parameter");
8826 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
8827 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
8829 c_parser_error (parser
, "expected integer expression");
8831 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
8834 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
8835 "expected %<,%> or %<)%>");
8837 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
8838 OMP_CLAUSE_CHAIN (c
) = list
;
8842 c_parser_error (parser
, "invalid schedule kind");
8843 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
8848 shared ( variable-list ) */
8851 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
8853 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
8860 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
8864 /* FIXME: Should we allow duplicates? */
8865 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
8867 c
= build_omp_clause (c_parser_peek_token (parser
)->location
,
8869 OMP_CLAUSE_CHAIN (c
) = list
;
8874 /* Parse all OpenMP clauses. The set clauses allowed by the directive
8875 is a bitmask in MASK. Return the list of clauses found; the result
8876 of clause default goes in *pdefault. */
8879 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
8882 tree clauses
= NULL
;
8885 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
8888 pragma_omp_clause c_kind
;
8890 tree prev
= clauses
;
8892 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
8893 c_parser_consume_token (parser
);
8896 here
= c_parser_peek_token (parser
)->location
;
8897 c_kind
= c_parser_omp_clause_name (parser
);
8901 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
8902 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
8903 c_name
= "collapse";
8905 case PRAGMA_OMP_CLAUSE_COPYIN
:
8906 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
8909 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
8910 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
8911 c_name
= "copyprivate";
8913 case PRAGMA_OMP_CLAUSE_DEFAULT
:
8914 clauses
= c_parser_omp_clause_default (parser
, clauses
);
8917 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
8918 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
8919 c_name
= "firstprivate";
8921 case PRAGMA_OMP_CLAUSE_IF
:
8922 clauses
= c_parser_omp_clause_if (parser
, clauses
);
8925 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
8926 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
8927 c_name
= "lastprivate";
8929 case PRAGMA_OMP_CLAUSE_NOWAIT
:
8930 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
8933 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
8934 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
8935 c_name
= "num_threads";
8937 case PRAGMA_OMP_CLAUSE_ORDERED
:
8938 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
8941 case PRAGMA_OMP_CLAUSE_PRIVATE
:
8942 clauses
= c_parser_omp_clause_private (parser
, clauses
);
8945 case PRAGMA_OMP_CLAUSE_REDUCTION
:
8946 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
8947 c_name
= "reduction";
8949 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
8950 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
8951 c_name
= "schedule";
8953 case PRAGMA_OMP_CLAUSE_SHARED
:
8954 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
8957 case PRAGMA_OMP_CLAUSE_UNTIED
:
8958 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
8962 c_parser_error (parser
, "expected %<#pragma omp%> clause");
8966 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
8968 /* Remove the invalid clause(s) from the list to avoid
8969 confusing the rest of the compiler. */
8971 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
8976 c_parser_skip_to_pragma_eol (parser
);
8978 return c_finish_omp_clauses (clauses
);
8985 In practice, we're also interested in adding the statement to an
8986 outer node. So it is convenient if we work around the fact that
8987 c_parser_statement calls add_stmt. */
8990 c_parser_omp_structured_block (c_parser
*parser
)
8992 tree stmt
= push_stmt_list ();
8993 c_parser_statement (parser
);
8994 return pop_stmt_list (stmt
);
8998 # pragma omp atomic new-line
9002 x binop= expr | x++ | ++x | x-- | --x
9004 +, *, -, /, &, ^, |, <<, >>
9006 where x is an lvalue expression with scalar type.
9008 LOC is the location of the #pragma token. */
9011 c_parser_omp_atomic (location_t loc
, c_parser
*parser
)
9015 enum tree_code code
;
9016 struct c_expr rhs_expr
;
9018 c_parser_skip_to_pragma_eol (parser
);
9020 lhs
= c_parser_unary_expression (parser
).value
;
9021 lhs
= c_fully_fold (lhs
, false, NULL
);
9022 switch (TREE_CODE (lhs
))
9026 c_parser_skip_to_end_of_block_or_statement (parser
);
9029 case PREINCREMENT_EXPR
:
9030 case POSTINCREMENT_EXPR
:
9031 lhs
= TREE_OPERAND (lhs
, 0);
9033 rhs
= integer_one_node
;
9036 case PREDECREMENT_EXPR
:
9037 case POSTDECREMENT_EXPR
:
9038 lhs
= TREE_OPERAND (lhs
, 0);
9040 rhs
= integer_one_node
;
9044 if (TREE_CODE (TREE_OPERAND (lhs
, 0)) == SAVE_EXPR
9045 && TREE_CODE (TREE_OPERAND (lhs
, 1)) == COMPOUND_EXPR
9046 && TREE_CODE (TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0)) == MODIFY_EXPR
9047 && TREE_OPERAND (TREE_OPERAND (lhs
, 1), 1) == TREE_OPERAND (lhs
, 0)
9048 && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND
9049 (TREE_OPERAND (lhs
, 1), 0), 0)))
9051 /* Undo effects of boolean_increment for post {in,de}crement. */
9052 lhs
= TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0);
9055 if (TREE_CODE (lhs
) == MODIFY_EXPR
9056 && TREE_CODE (TREE_TYPE (TREE_OPERAND (lhs
, 0))) == BOOLEAN_TYPE
)
9058 /* Undo effects of boolean_increment. */
9059 if (integer_onep (TREE_OPERAND (lhs
, 1)))
9061 /* This is pre or post increment. */
9062 rhs
= TREE_OPERAND (lhs
, 1);
9063 lhs
= TREE_OPERAND (lhs
, 0);
9067 if (TREE_CODE (TREE_OPERAND (lhs
, 1)) == TRUTH_NOT_EXPR
9068 && TREE_OPERAND (lhs
, 0)
9069 == TREE_OPERAND (TREE_OPERAND (lhs
, 1), 0))
9071 /* This is pre or post decrement. */
9072 rhs
= TREE_OPERAND (lhs
, 1);
9073 lhs
= TREE_OPERAND (lhs
, 0);
9080 switch (c_parser_peek_token (parser
)->type
)
9086 code
= TRUNC_DIV_EXPR
;
9101 code
= BIT_AND_EXPR
;
9104 code
= BIT_IOR_EXPR
;
9107 code
= BIT_XOR_EXPR
;
9110 c_parser_error (parser
,
9111 "invalid operator for %<#pragma omp atomic%>");
9115 /* Arrange to pass the location of the assignment operator to
9116 c_finish_omp_atomic. */
9117 loc
= c_parser_peek_token (parser
)->location
;
9118 c_parser_consume_token (parser
);
9120 location_t rhs_loc
= c_parser_peek_token (parser
)->location
;
9121 rhs_expr
= c_parser_expression (parser
);
9122 rhs_expr
= default_function_array_read_conversion (rhs_loc
, rhs_expr
);
9124 rhs
= rhs_expr
.value
;
9125 rhs
= c_fully_fold (rhs
, false, NULL
);
9128 stmt
= c_finish_omp_atomic (loc
, code
, lhs
, rhs
);
9129 if (stmt
!= error_mark_node
)
9131 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9136 # pragma omp barrier new-line
9140 c_parser_omp_barrier (c_parser
*parser
)
9142 location_t loc
= c_parser_peek_token (parser
)->location
;
9143 c_parser_consume_pragma (parser
);
9144 c_parser_skip_to_pragma_eol (parser
);
9146 c_finish_omp_barrier (loc
);
9150 # pragma omp critical [(name)] new-line
9153 LOC is the location of the #pragma itself. */
9156 c_parser_omp_critical (location_t loc
, c_parser
*parser
)
9158 tree stmt
, name
= NULL
;
9160 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9162 c_parser_consume_token (parser
);
9163 if (c_parser_next_token_is (parser
, CPP_NAME
))
9165 name
= c_parser_peek_token (parser
)->value
;
9166 c_parser_consume_token (parser
);
9167 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9170 c_parser_error (parser
, "expected identifier");
9172 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9173 c_parser_error (parser
, "expected %<(%> or end of line");
9174 c_parser_skip_to_pragma_eol (parser
);
9176 stmt
= c_parser_omp_structured_block (parser
);
9177 return c_finish_omp_critical (loc
, stmt
, name
);
9181 # pragma omp flush flush-vars[opt] new-line
9184 ( variable-list ) */
9187 c_parser_omp_flush (c_parser
*parser
)
9189 location_t loc
= c_parser_peek_token (parser
)->location
;
9190 c_parser_consume_pragma (parser
);
9191 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
9192 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9193 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
9194 c_parser_error (parser
, "expected %<(%> or end of line");
9195 c_parser_skip_to_pragma_eol (parser
);
9197 c_finish_omp_flush (loc
);
9200 /* Parse the restricted form of the for statement allowed by OpenMP.
9201 The real trick here is to determine the loop control variable early
9202 so that we can push a new decl if necessary to make it private.
9203 LOC is the location of the OMP in "#pragma omp". */
9206 c_parser_omp_for_loop (location_t loc
,
9207 c_parser
*parser
, tree clauses
, tree
*par_clauses
)
9209 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
9210 tree declv
, condv
, incrv
, initv
, ret
= NULL
;
9211 bool fail
= false, open_brace_parsed
= false;
9212 int i
, collapse
= 1, nbraces
= 0;
9214 VEC(tree
,gc
) *for_block
= make_tree_vector ();
9216 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
9217 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
9218 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
9220 gcc_assert (collapse
>= 1);
9222 declv
= make_tree_vec (collapse
);
9223 initv
= make_tree_vec (collapse
);
9224 condv
= make_tree_vec (collapse
);
9225 incrv
= make_tree_vec (collapse
);
9227 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
9229 c_parser_error (parser
, "for statement expected");
9232 for_loc
= c_parser_peek_token (parser
)->location
;
9233 c_parser_consume_token (parser
);
9235 for (i
= 0; i
< collapse
; i
++)
9239 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
9242 /* Parse the initialization declaration or expression. */
9243 if (c_parser_next_tokens_start_declaration (parser
))
9246 VEC_safe_push (tree
, gc
, for_block
, c_begin_compound_stmt (true));
9247 c_parser_declaration_or_fndef (parser
, true, true, true, true, true, NULL
);
9248 decl
= check_for_loop_decls (for_loc
, flag_isoc99
);
9251 if (DECL_INITIAL (decl
) == error_mark_node
)
9252 decl
= error_mark_node
;
9255 else if (c_parser_next_token_is (parser
, CPP_NAME
)
9256 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
9258 struct c_expr decl_exp
;
9259 struct c_expr init_exp
;
9260 location_t init_loc
;
9262 decl_exp
= c_parser_postfix_expression (parser
);
9263 decl
= decl_exp
.value
;
9265 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
9267 init_loc
= c_parser_peek_token (parser
)->location
;
9268 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
9269 init_exp
= default_function_array_read_conversion (init_loc
,
9271 init
= build_modify_expr (init_loc
, decl
, decl_exp
.original_type
,
9272 NOP_EXPR
, init_loc
, init_exp
.value
,
9273 init_exp
.original_type
);
9274 init
= c_process_expr_stmt (init_loc
, init
);
9276 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9281 c_parser_error (parser
,
9282 "expected iteration declaration or initialization");
9283 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
9289 /* Parse the loop condition. */
9291 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
9293 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
9294 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
);
9296 cond
= cond_expr
.value
;
9297 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
9298 cond
= c_fully_fold (cond
, false, NULL
);
9299 switch (cond_expr
.original_code
)
9307 /* Can't be cond = error_mark_node, because we want to preserve
9308 the location until c_finish_omp_for. */
9309 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
9312 protected_set_expr_location (cond
, cond_loc
);
9314 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
9316 /* Parse the increment expression. */
9318 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
9320 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
9322 incr
= c_process_expr_stmt (incr_loc
,
9323 c_parser_expression (parser
).value
);
9325 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
9327 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
9331 TREE_VEC_ELT (declv
, i
) = decl
;
9332 TREE_VEC_ELT (initv
, i
) = init
;
9333 TREE_VEC_ELT (condv
, i
) = cond
;
9334 TREE_VEC_ELT (incrv
, i
) = incr
;
9338 if (i
== collapse
- 1)
9341 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
9342 in between the collapsed for loops to be still considered perfectly
9343 nested. Hopefully the final version clarifies this.
9344 For now handle (multiple) {'s and empty statements. */
9347 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9349 c_parser_consume_token (parser
);
9352 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
9354 c_parser_consume_token (parser
);
9358 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9359 c_parser_consume_token (parser
);
9362 c_parser_error (parser
, "not enough perfectly nested loops");
9365 open_brace_parsed
= true;
9375 nbraces
+= bracecount
;
9378 save_break
= c_break_label
;
9379 c_break_label
= size_one_node
;
9380 save_cont
= c_cont_label
;
9381 c_cont_label
= NULL_TREE
;
9382 body
= push_stmt_list ();
9384 if (open_brace_parsed
)
9386 location_t here
= c_parser_peek_token (parser
)->location
;
9387 stmt
= c_begin_compound_stmt (true);
9388 c_parser_compound_statement_nostart (parser
);
9389 add_stmt (c_end_compound_stmt (here
, stmt
, true));
9392 add_stmt (c_parser_c99_block_statement (parser
));
9395 tree t
= build1 (LABEL_EXPR
, void_type_node
, c_cont_label
);
9396 SET_EXPR_LOCATION (t
, loc
);
9400 body
= pop_stmt_list (body
);
9401 c_break_label
= save_break
;
9402 c_cont_label
= save_cont
;
9406 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9408 c_parser_consume_token (parser
);
9411 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
9412 c_parser_consume_token (parser
);
9415 c_parser_error (parser
, "collapsed loops not perfectly nested");
9418 location_t here
= c_parser_peek_token (parser
)->location
;
9419 stmt
= c_begin_compound_stmt (true);
9421 c_parser_compound_statement_nostart (parser
);
9422 body
= c_end_compound_stmt (here
, stmt
, true);
9429 /* Only bother calling c_finish_omp_for if we haven't already generated
9430 an error from the initialization parsing. */
9433 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
9436 if (par_clauses
!= NULL
)
9439 for (c
= par_clauses
; *c
; )
9440 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
9441 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
9442 c
= &OMP_CLAUSE_CHAIN (*c
);
9445 for (i
= 0; i
< collapse
; i
++)
9446 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
9449 c
= &OMP_CLAUSE_CHAIN (*c
);
9450 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
9453 "iteration variable %qD should not be firstprivate",
9454 OMP_CLAUSE_DECL (*c
));
9455 *c
= OMP_CLAUSE_CHAIN (*c
);
9459 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
9460 change it to shared (decl) in
9461 OMP_PARALLEL_CLAUSES. */
9462 tree l
= build_omp_clause (OMP_CLAUSE_LOCATION (*c
),
9463 OMP_CLAUSE_LASTPRIVATE
);
9464 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
9465 OMP_CLAUSE_CHAIN (l
) = clauses
;
9467 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
9471 OMP_FOR_CLAUSES (stmt
) = clauses
;
9476 while (!VEC_empty (tree
, for_block
))
9478 /* FIXME diagnostics: LOC below should be the actual location of
9479 this particular for block. We need to build a list of
9480 locations to go along with FOR_BLOCK. */
9481 stmt
= c_end_compound_stmt (loc
, VEC_pop (tree
, for_block
), true);
9484 release_tree_vector (for_block
);
9489 #pragma omp for for-clause[optseq] new-line
9492 LOC is the location of the #pragma token.
9495 #define OMP_FOR_CLAUSE_MASK \
9496 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9497 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9498 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9499 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9500 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
9501 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
9502 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
9503 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9506 c_parser_omp_for (location_t loc
, c_parser
*parser
)
9508 tree block
, clauses
, ret
;
9510 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
9513 block
= c_begin_compound_stmt (true);
9514 ret
= c_parser_omp_for_loop (loc
, parser
, clauses
, NULL
);
9515 block
= c_end_compound_stmt (loc
, block
, true);
9522 # pragma omp master new-line
9525 LOC is the location of the #pragma token.
9529 c_parser_omp_master (location_t loc
, c_parser
*parser
)
9531 c_parser_skip_to_pragma_eol (parser
);
9532 return c_finish_omp_master (loc
, c_parser_omp_structured_block (parser
));
9536 # pragma omp ordered new-line
9539 LOC is the location of the #pragma itself.
9543 c_parser_omp_ordered (location_t loc
, c_parser
*parser
)
9545 c_parser_skip_to_pragma_eol (parser
);
9546 return c_finish_omp_ordered (loc
, c_parser_omp_structured_block (parser
));
9552 { section-sequence }
9555 section-directive[opt] structured-block
9556 section-sequence section-directive structured-block
9558 SECTIONS_LOC is the location of the #pragma omp sections. */
9561 c_parser_omp_sections_scope (location_t sections_loc
, c_parser
*parser
)
9564 bool error_suppress
= false;
9567 loc
= c_parser_peek_token (parser
)->location
;
9568 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
9570 /* Avoid skipping until the end of the block. */
9571 parser
->error
= false;
9575 stmt
= push_stmt_list ();
9577 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
9579 substmt
= push_stmt_list ();
9583 c_parser_statement (parser
);
9585 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9587 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9589 if (c_parser_next_token_is (parser
, CPP_EOF
))
9593 substmt
= pop_stmt_list (substmt
);
9594 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9595 SET_EXPR_LOCATION (substmt
, loc
);
9601 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
9603 if (c_parser_next_token_is (parser
, CPP_EOF
))
9606 loc
= c_parser_peek_token (parser
)->location
;
9607 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
9609 c_parser_consume_pragma (parser
);
9610 c_parser_skip_to_pragma_eol (parser
);
9611 error_suppress
= false;
9613 else if (!error_suppress
)
9615 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
9616 error_suppress
= true;
9619 substmt
= c_parser_omp_structured_block (parser
);
9620 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
9621 SET_EXPR_LOCATION (substmt
, loc
);
9624 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
9625 "expected %<#pragma omp section%> or %<}%>");
9627 substmt
= pop_stmt_list (stmt
);
9629 stmt
= make_node (OMP_SECTIONS
);
9630 SET_EXPR_LOCATION (stmt
, sections_loc
);
9631 TREE_TYPE (stmt
) = void_type_node
;
9632 OMP_SECTIONS_BODY (stmt
) = substmt
;
9634 return add_stmt (stmt
);
9638 # pragma omp sections sections-clause[optseq] newline
9641 LOC is the location of the #pragma token.
9644 #define OMP_SECTIONS_CLAUSE_MASK \
9645 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9646 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9647 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
9648 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9649 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9652 c_parser_omp_sections (location_t loc
, c_parser
*parser
)
9654 tree block
, clauses
, ret
;
9656 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
9657 "#pragma omp sections");
9659 block
= c_begin_compound_stmt (true);
9660 ret
= c_parser_omp_sections_scope (loc
, parser
);
9662 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
9663 block
= c_end_compound_stmt (loc
, block
, true);
9670 # pragma parallel parallel-clause new-line
9671 # pragma parallel for parallel-for-clause new-line
9672 # pragma parallel sections parallel-sections-clause new-line
9674 LOC is the location of the #pragma token.
9677 #define OMP_PARALLEL_CLAUSE_MASK \
9678 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9679 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9680 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9681 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9682 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
9683 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
9684 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
9685 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
9688 c_parser_omp_parallel (location_t loc
, c_parser
*parser
)
9690 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
9691 const char *p_name
= "#pragma omp parallel";
9692 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
9693 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
9695 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
9697 c_parser_consume_token (parser
);
9698 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
9699 p_name
= "#pragma omp parallel for";
9700 mask
|= OMP_FOR_CLAUSE_MASK
;
9701 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9703 else if (c_parser_next_token_is (parser
, CPP_NAME
))
9705 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
9706 if (strcmp (p
, "sections") == 0)
9708 c_parser_consume_token (parser
);
9709 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
9710 p_name
= "#pragma omp parallel sections";
9711 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
9712 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
9716 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
9720 case PRAGMA_OMP_PARALLEL
:
9721 block
= c_begin_omp_parallel ();
9722 c_parser_statement (parser
);
9723 stmt
= c_finish_omp_parallel (loc
, clauses
, block
);
9726 case PRAGMA_OMP_PARALLEL_FOR
:
9727 block
= c_begin_omp_parallel ();
9728 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9729 c_parser_omp_for_loop (loc
, parser
, ws_clause
, &par_clause
);
9730 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9731 OMP_PARALLEL_COMBINED (stmt
) = 1;
9734 case PRAGMA_OMP_PARALLEL_SECTIONS
:
9735 block
= c_begin_omp_parallel ();
9736 c_split_parallel_clauses (loc
, clauses
, &par_clause
, &ws_clause
);
9737 stmt
= c_parser_omp_sections_scope (loc
, parser
);
9739 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
9740 stmt
= c_finish_omp_parallel (loc
, par_clause
, block
);
9741 OMP_PARALLEL_COMBINED (stmt
) = 1;
9752 # pragma omp single single-clause[optseq] new-line
9755 LOC is the location of the #pragma.
9758 #define OMP_SINGLE_CLAUSE_MASK \
9759 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9760 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9761 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
9762 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
9765 c_parser_omp_single (location_t loc
, c_parser
*parser
)
9767 tree stmt
= make_node (OMP_SINGLE
);
9768 SET_EXPR_LOCATION (stmt
, loc
);
9769 TREE_TYPE (stmt
) = void_type_node
;
9771 OMP_SINGLE_CLAUSES (stmt
)
9772 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
9773 "#pragma omp single");
9774 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
9776 return add_stmt (stmt
);
9780 # pragma omp task task-clause[optseq] new-line
9782 LOC is the location of the #pragma.
9785 #define OMP_TASK_CLAUSE_MASK \
9786 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
9787 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
9788 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
9789 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
9790 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
9791 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
9794 c_parser_omp_task (location_t loc
, c_parser
*parser
)
9796 tree clauses
, block
;
9798 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
9799 "#pragma omp task");
9801 block
= c_begin_omp_task ();
9802 c_parser_statement (parser
);
9803 return c_finish_omp_task (loc
, clauses
, block
);
9807 # pragma omp taskwait new-line
9811 c_parser_omp_taskwait (c_parser
*parser
)
9813 location_t loc
= c_parser_peek_token (parser
)->location
;
9814 c_parser_consume_pragma (parser
);
9815 c_parser_skip_to_pragma_eol (parser
);
9817 c_finish_omp_taskwait (loc
);
9820 /* Main entry point to parsing most OpenMP pragmas. */
9823 c_parser_omp_construct (c_parser
*parser
)
9825 enum pragma_kind p_kind
;
9829 loc
= c_parser_peek_token (parser
)->location
;
9830 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
9831 c_parser_consume_pragma (parser
);
9835 case PRAGMA_OMP_ATOMIC
:
9836 c_parser_omp_atomic (loc
, parser
);
9838 case PRAGMA_OMP_CRITICAL
:
9839 stmt
= c_parser_omp_critical (loc
, parser
);
9841 case PRAGMA_OMP_FOR
:
9842 stmt
= c_parser_omp_for (loc
, parser
);
9844 case PRAGMA_OMP_MASTER
:
9845 stmt
= c_parser_omp_master (loc
, parser
);
9847 case PRAGMA_OMP_ORDERED
:
9848 stmt
= c_parser_omp_ordered (loc
, parser
);
9850 case PRAGMA_OMP_PARALLEL
:
9851 stmt
= c_parser_omp_parallel (loc
, parser
);
9853 case PRAGMA_OMP_SECTIONS
:
9854 stmt
= c_parser_omp_sections (loc
, parser
);
9856 case PRAGMA_OMP_SINGLE
:
9857 stmt
= c_parser_omp_single (loc
, parser
);
9859 case PRAGMA_OMP_TASK
:
9860 stmt
= c_parser_omp_task (loc
, parser
);
9867 gcc_assert (EXPR_LOCATION (stmt
) != UNKNOWN_LOCATION
);
9872 # pragma omp threadprivate (variable-list) */
9875 c_parser_omp_threadprivate (c_parser
*parser
)
9880 c_parser_consume_pragma (parser
);
9881 loc
= c_parser_peek_token (parser
)->location
;
9882 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
9884 /* Mark every variable in VARS to be assigned thread local storage. */
9885 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
9887 tree v
= TREE_PURPOSE (t
);
9889 /* FIXME diagnostics: Ideally we should keep individual
9890 locations for all the variables in the var list to make the
9891 following errors more precise. Perhaps
9892 c_parser_omp_var_list_parens() should construct a list of
9893 locations to go along with the var list. */
9895 /* If V had already been marked threadprivate, it doesn't matter
9896 whether it had been used prior to this point. */
9897 if (TREE_CODE (v
) != VAR_DECL
)
9898 error_at (loc
, "%qD is not a variable", v
);
9899 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
9900 error_at (loc
, "%qE declared %<threadprivate%> after first use", v
);
9901 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
9902 error_at (loc
, "automatic variable %qE cannot be %<threadprivate%>", v
);
9903 else if (TREE_TYPE (v
) == error_mark_node
)
9905 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
9906 error_at (loc
, "%<threadprivate%> %qE has incomplete type", v
);
9909 if (! DECL_THREAD_LOCAL_P (v
))
9911 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
9912 /* If rtl has been already set for this var, call
9913 make_decl_rtl once again, so that encode_section_info
9914 has a chance to look at the new decl flags. */
9915 if (DECL_RTL_SET_P (v
))
9918 C_DECL_THREADPRIVATE_P (v
) = 1;
9922 c_parser_skip_to_pragma_eol (parser
);
9926 /* Parse a single source file. */
9931 /* Use local storage to begin. If the first token is a pragma, parse it.
9932 If it is #pragma GCC pch_preprocess, then this will load a PCH file
9933 which will cause garbage collection. */
9936 memset (&tparser
, 0, sizeof tparser
);
9937 the_parser
= &tparser
;
9939 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
9940 c_parser_pragma_pch_preprocess (&tparser
);
9942 the_parser
= ggc_alloc_c_parser ();
9943 *the_parser
= tparser
;
9945 /* Initialize EH, if we've been told to do so. */
9946 if (flag_exceptions
)
9947 using_eh_for_cleanups ();
9949 c_parser_translation_unit (the_parser
);
9953 #include "gt-c-parser.h"