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
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"
46 #include "langhooks.h"
63 /* Initialization routine for this file. */
68 /* The only initialization required is of the reserved word
79 mask
|= D_ASM
| D_EXT
;
83 if (!c_dialect_objc ())
84 mask
|= D_OBJC
| D_CXX_OBJC
;
86 ridpointers
= GGC_CNEWVEC (tree
, (int) RID_MAX
);
87 for (i
= 0; i
< num_c_common_reswords
; i
++)
89 /* If a keyword is disabled, do not enter it into the table
90 and so create a canonical spelling that isn't a keyword. */
91 if (c_common_reswords
[i
].disable
& mask
)
94 && (c_common_reswords
[i
].disable
& D_CXXWARN
))
96 id
= get_identifier (c_common_reswords
[i
].word
);
97 C_SET_RID_CODE (id
, RID_CXX_COMPAT_WARN
);
98 C_IS_RESERVED_WORD (id
) = 1;
103 id
= get_identifier (c_common_reswords
[i
].word
);
104 C_SET_RID_CODE (id
, c_common_reswords
[i
].rid
);
105 C_IS_RESERVED_WORD (id
) = 1;
106 ridpointers
[(int) c_common_reswords
[i
].rid
] = id
;
110 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
111 and the C parser. Unlike the C++ lexer, the parser structure
112 stores the lexer information instead of using a separate structure.
113 Identifiers are separated into ordinary identifiers, type names,
114 keywords and some other Objective-C types of identifiers, and some
115 look-ahead is maintained.
117 ??? It might be a good idea to lex the whole file up front (as for
118 C++). It would then be possible to share more of the C and C++
119 lexer code, if desired. */
121 /* The following local token type is used. */
124 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
126 /* More information about the type of a CPP_NAME token. */
127 typedef enum c_id_kind
{
128 /* An ordinary identifier. */
130 /* An identifier declared as a typedef name. */
132 /* An identifier declared as an Objective-C class name. */
134 /* Not an identifier. */
138 /* A single C token after string literal concatenation and conversion
139 of preprocessing tokens to tokens. */
140 typedef struct c_token
GTY (())
142 /* The kind of token. */
143 ENUM_BITFIELD (cpp_ttype
) type
: 8;
144 /* If this token is a CPP_NAME, this value indicates whether also
145 declared as some kind of type. Otherwise, it is C_ID_NONE. */
146 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
147 /* If this token is a keyword, this value indicates which keyword.
148 Otherwise, this value is RID_MAX. */
149 ENUM_BITFIELD (rid
) keyword
: 8;
150 /* If this token is a CPP_PRAGMA, this indicates the pragma that
151 was seen. Otherwise it is PRAGMA_NONE. */
152 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 8;
153 /* The value associated with this token, if any. */
155 /* The location at which this token was found. */
159 /* A parser structure recording information about the state and
160 context of parsing. Includes lexer information with up to two
161 tokens of look-ahead; more are not needed for C. */
162 typedef struct c_parser
GTY(())
164 /* The look-ahead tokens. */
166 /* How many look-ahead tokens are available (0, 1 or 2). */
168 /* True if a syntax error is being recovered from; false otherwise.
169 c_parser_error sets this flag. It should clear this flag when
170 enough tokens have been consumed to recover from the error. */
171 BOOL_BITFIELD error
: 1;
172 /* True if we're processing a pragma, and shouldn't automatically
173 consume CPP_PRAGMA_EOL. */
174 BOOL_BITFIELD in_pragma
: 1;
175 /* True if we're parsing the outermost block of an if statement. */
176 BOOL_BITFIELD in_if_block
: 1;
177 /* True if we want to lex an untranslated string. */
178 BOOL_BITFIELD lex_untranslated_string
: 1;
179 /* Objective-C specific parser/lexer information. */
180 BOOL_BITFIELD objc_pq_context
: 1;
181 /* The following flag is needed to contextualize Objective-C lexical
182 analysis. In some cases (e.g., 'int NSObject;'), it is
183 undesirable to bind an identifier to an Objective-C class, even
184 if a class with that name exists. */
185 BOOL_BITFIELD objc_need_raw_identifier
: 1;
189 /* The actual parser and external interface. ??? Does this need to be
190 garbage-collected? */
192 static GTY (()) c_parser
*the_parser
;
195 /* Read in and lex a single token, storing it in *TOKEN. */
198 c_lex_one_token (c_parser
*parser
, c_token
*token
)
200 timevar_push (TV_LEX
);
202 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
,
203 (parser
->lex_untranslated_string
204 ? C_LEX_STRING_NO_TRANSLATE
: 0));
205 token
->id_kind
= C_ID_NONE
;
206 token
->keyword
= RID_MAX
;
207 token
->pragma_kind
= PRAGMA_NONE
;
215 bool objc_force_identifier
= parser
->objc_need_raw_identifier
;
216 if (c_dialect_objc ())
217 parser
->objc_need_raw_identifier
= false;
219 if (C_IS_RESERVED_WORD (token
->value
))
221 enum rid rid_code
= C_RID_CODE (token
->value
);
223 if (rid_code
== RID_CXX_COMPAT_WARN
)
225 warning_at (token
->location
,
227 "identifier %qs conflicts with C++ keyword",
228 IDENTIFIER_POINTER (token
->value
));
230 else if (c_dialect_objc ())
232 if (!objc_is_reserved_word (token
->value
)
233 && (!OBJC_IS_PQ_KEYWORD (rid_code
)
234 || parser
->objc_pq_context
))
236 /* Return the canonical spelling for this keyword. */
237 token
->value
= ridpointers
[(int) rid_code
];
238 token
->type
= CPP_KEYWORD
;
239 token
->keyword
= rid_code
;
245 token
->type
= CPP_KEYWORD
;
246 token
->keyword
= rid_code
;
251 decl
= lookup_name (token
->value
);
254 if (TREE_CODE (decl
) == TYPE_DECL
)
256 token
->id_kind
= C_ID_TYPENAME
;
260 else if (c_dialect_objc ())
262 tree objc_interface_decl
= objc_is_class_name (token
->value
);
263 /* Objective-C class names are in the same namespace as
264 variables and typedefs, and hence are shadowed by local
266 if (objc_interface_decl
267 && (global_bindings_p ()
268 || (!objc_force_identifier
&& !decl
)))
270 token
->value
= objc_interface_decl
;
271 token
->id_kind
= C_ID_CLASSNAME
;
275 token
->id_kind
= C_ID_ID
;
279 /* This only happens in Objective-C; it must be a keyword. */
280 token
->type
= CPP_KEYWORD
;
281 token
->keyword
= C_RID_CODE (token
->value
);
285 case CPP_CLOSE_PAREN
:
287 /* These tokens may affect the interpretation of any identifiers
288 following, if doing Objective-C. */
289 if (c_dialect_objc ())
290 parser
->objc_need_raw_identifier
= false;
293 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
294 token
->pragma_kind
= (enum pragma_kind
) TREE_INT_CST_LOW (token
->value
);
300 timevar_pop (TV_LEX
);
303 /* Return a pointer to the next token from PARSER, reading it in if
306 static inline c_token
*
307 c_parser_peek_token (c_parser
*parser
)
309 if (parser
->tokens_avail
== 0)
311 c_lex_one_token (parser
, &parser
->tokens
[0]);
312 parser
->tokens_avail
= 1;
314 return &parser
->tokens
[0];
317 /* Return true if the next token from PARSER has the indicated
321 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
323 return c_parser_peek_token (parser
)->type
== type
;
326 /* Return true if the next token from PARSER does not have the
330 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
332 return !c_parser_next_token_is (parser
, type
);
335 /* Return true if the next token from PARSER is the indicated
339 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
341 return c_parser_peek_token (parser
)->keyword
== keyword
;
344 /* Return true if TOKEN can start a type name,
347 c_token_starts_typename (c_token
*token
)
352 switch (token
->id_kind
)
359 gcc_assert (c_dialect_objc ());
365 switch (token
->keyword
)
397 if (c_dialect_objc ())
405 /* Return true if the next token from PARSER can start a type name,
408 c_parser_next_token_starts_typename (c_parser
*parser
)
410 c_token
*token
= c_parser_peek_token (parser
);
411 return c_token_starts_typename (token
);
414 /* Return true if TOKEN can start declaration specifiers, false
417 c_token_starts_declspecs (c_token
*token
)
422 switch (token
->id_kind
)
429 gcc_assert (c_dialect_objc ());
435 switch (token
->keyword
)
474 if (c_dialect_objc ())
482 /* Return true if the next token from PARSER can start declaration
483 specifiers, false otherwise. */
485 c_parser_next_token_starts_declspecs (c_parser
*parser
)
487 c_token
*token
= c_parser_peek_token (parser
);
488 return c_token_starts_declspecs (token
);
491 /* Return a pointer to the next-but-one token from PARSER, reading it
492 in if necessary. The next token is already read in. */
495 c_parser_peek_2nd_token (c_parser
*parser
)
497 if (parser
->tokens_avail
>= 2)
498 return &parser
->tokens
[1];
499 gcc_assert (parser
->tokens_avail
== 1);
500 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
501 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
502 c_lex_one_token (parser
, &parser
->tokens
[1]);
503 parser
->tokens_avail
= 2;
504 return &parser
->tokens
[1];
507 /* Consume the next token from PARSER. */
510 c_parser_consume_token (c_parser
*parser
)
512 gcc_assert (parser
->tokens_avail
>= 1);
513 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
514 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
515 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
516 if (parser
->tokens_avail
== 2)
517 parser
->tokens
[0] = parser
->tokens
[1];
518 parser
->tokens_avail
--;
521 /* Expect the current token to be a #pragma. Consume it and remember
522 that we've begun parsing a pragma. */
525 c_parser_consume_pragma (c_parser
*parser
)
527 gcc_assert (!parser
->in_pragma
);
528 gcc_assert (parser
->tokens_avail
>= 1);
529 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
530 if (parser
->tokens_avail
== 2)
531 parser
->tokens
[0] = parser
->tokens
[1];
532 parser
->tokens_avail
--;
533 parser
->in_pragma
= true;
536 /* Update the globals input_location and in_system_header from
539 c_parser_set_source_position_from_token (c_token
*token
)
541 if (token
->type
!= CPP_EOF
)
543 input_location
= token
->location
;
547 /* Issue a diagnostic of the form
548 FILE:LINE: MESSAGE before TOKEN
549 where TOKEN is the next token in the input stream of PARSER.
550 MESSAGE (specified by the caller) is usually of the form "expected
553 Do not issue a diagnostic if still recovering from an error.
555 ??? This is taken from the C++ parser, but building up messages in
556 this way is not i18n-friendly and some other approach should be
560 c_parser_error (c_parser
*parser
, const char *gmsgid
)
562 c_token
*token
= c_parser_peek_token (parser
);
565 parser
->error
= true;
568 /* This diagnostic makes more sense if it is tagged to the line of
569 the token we just peeked at. */
570 c_parser_set_source_position_from_token (token
);
571 c_parse_error (gmsgid
,
572 /* Because c_parse_error does not understand
573 CPP_KEYWORD, keywords are treated like
575 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
579 /* If the next token is of the indicated TYPE, consume it. Otherwise,
580 issue the error MSGID. If MSGID is NULL then a message has already
581 been produced and no message will be produced this time. Returns
582 true if found, false otherwise. */
585 c_parser_require (c_parser
*parser
,
589 if (c_parser_next_token_is (parser
, type
))
591 c_parser_consume_token (parser
);
596 c_parser_error (parser
, msgid
);
601 /* If the next token is the indicated keyword, consume it. Otherwise,
602 issue the error MSGID. Returns true if found, false otherwise. */
605 c_parser_require_keyword (c_parser
*parser
,
609 if (c_parser_next_token_is_keyword (parser
, keyword
))
611 c_parser_consume_token (parser
);
616 c_parser_error (parser
, msgid
);
621 /* Like c_parser_require, except that tokens will be skipped until the
622 desired token is found. An error message is still produced if the
623 next token is not as expected. If MSGID is NULL then a message has
624 already been produced and no message will be produced this
628 c_parser_skip_until_found (c_parser
*parser
,
632 unsigned nesting_depth
= 0;
634 if (c_parser_require (parser
, type
, msgid
))
637 /* Skip tokens until the desired token is found. */
640 /* Peek at the next token. */
641 c_token
*token
= c_parser_peek_token (parser
);
642 /* If we've reached the token we want, consume it and stop. */
643 if (token
->type
== type
&& !nesting_depth
)
645 c_parser_consume_token (parser
);
649 /* If we've run out of tokens, stop. */
650 if (token
->type
== CPP_EOF
)
652 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
654 if (token
->type
== CPP_OPEN_BRACE
655 || token
->type
== CPP_OPEN_PAREN
656 || token
->type
== CPP_OPEN_SQUARE
)
658 else if (token
->type
== CPP_CLOSE_BRACE
659 || token
->type
== CPP_CLOSE_PAREN
660 || token
->type
== CPP_CLOSE_SQUARE
)
662 if (nesting_depth
-- == 0)
665 /* Consume this token. */
666 c_parser_consume_token (parser
);
668 parser
->error
= false;
671 /* Skip tokens until the end of a parameter is found, but do not
672 consume the comma, semicolon or closing delimiter. */
675 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
677 unsigned nesting_depth
= 0;
681 c_token
*token
= c_parser_peek_token (parser
);
682 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
685 /* If we've run out of tokens, stop. */
686 if (token
->type
== CPP_EOF
)
688 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
690 if (token
->type
== CPP_OPEN_BRACE
691 || token
->type
== CPP_OPEN_PAREN
692 || token
->type
== CPP_OPEN_SQUARE
)
694 else if (token
->type
== CPP_CLOSE_BRACE
695 || token
->type
== CPP_CLOSE_PAREN
696 || token
->type
== CPP_CLOSE_SQUARE
)
698 if (nesting_depth
-- == 0)
701 /* Consume this token. */
702 c_parser_consume_token (parser
);
704 parser
->error
= false;
707 /* Expect to be at the end of the pragma directive and consume an
708 end of line marker. */
711 c_parser_skip_to_pragma_eol (c_parser
*parser
)
713 gcc_assert (parser
->in_pragma
);
714 parser
->in_pragma
= false;
716 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
719 c_token
*token
= c_parser_peek_token (parser
);
720 if (token
->type
== CPP_EOF
)
722 if (token
->type
== CPP_PRAGMA_EOL
)
724 c_parser_consume_token (parser
);
727 c_parser_consume_token (parser
);
730 parser
->error
= false;
733 /* Skip tokens until we have consumed an entire block, or until we
734 have consumed a non-nested ';'. */
737 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
739 unsigned nesting_depth
= 0;
740 bool save_error
= parser
->error
;
746 /* Peek at the next token. */
747 token
= c_parser_peek_token (parser
);
755 if (parser
->in_pragma
)
760 /* If the next token is a ';', we have reached the
761 end of the statement. */
764 /* Consume the ';'. */
765 c_parser_consume_token (parser
);
770 case CPP_CLOSE_BRACE
:
771 /* If the next token is a non-nested '}', then we have
772 reached the end of the current block. */
773 if (nesting_depth
== 0 || --nesting_depth
== 0)
775 c_parser_consume_token (parser
);
781 /* If it the next token is a '{', then we are entering a new
782 block. Consume the entire block. */
787 /* If we see a pragma, consume the whole thing at once. We
788 have some safeguards against consuming pragmas willy-nilly.
789 Normally, we'd expect to be here with parser->error set,
790 which disables these safeguards. But it's possible to get
791 here for secondary error recovery, after parser->error has
793 c_parser_consume_pragma (parser
);
794 c_parser_skip_to_pragma_eol (parser
);
795 parser
->error
= save_error
;
802 c_parser_consume_token (parser
);
806 parser
->error
= false;
809 /* CPP's options (initialized by c-opts.c). */
810 extern cpp_options
*cpp_opts
;
812 /* Save the warning flags which are controlled by __extension__. */
815 disable_extension_diagnostics (void)
818 | (warn_pointer_arith
<< 1)
819 | (warn_traditional
<< 2)
821 | (warn_long_long
<< 4));
822 cpp_opts
->pedantic
= pedantic
= 0;
823 warn_pointer_arith
= 0;
824 cpp_opts
->warn_traditional
= warn_traditional
= 0;
826 cpp_opts
->warn_long_long
= warn_long_long
= 0;
830 /* Restore the warning flags which are controlled by __extension__.
831 FLAGS is the return value from disable_extension_diagnostics. */
834 restore_extension_diagnostics (int flags
)
836 cpp_opts
->pedantic
= pedantic
= flags
& 1;
837 warn_pointer_arith
= (flags
>> 1) & 1;
838 cpp_opts
->warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
839 flag_iso
= (flags
>> 3) & 1;
840 cpp_opts
->warn_long_long
= warn_long_long
= (flags
>> 4) & 1;
843 /* Possibly kinds of declarator to parse. */
844 typedef enum c_dtr_syn
{
845 /* A normal declarator with an identifier. */
847 /* An abstract declarator (maybe empty). */
849 /* A parameter declarator: may be either, but after a type name does
850 not redeclare a typedef name as an identifier if it can
851 alternatively be interpreted as a typedef name; see DR#009,
852 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
853 following DR#249. For example, given a typedef T, "int T" and
854 "int *T" are valid parameter declarations redeclaring T, while
855 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
856 abstract declarators rather than involving redundant parentheses;
857 the same applies with attributes inside the parentheses before
862 static void c_parser_external_declaration (c_parser
*);
863 static void c_parser_asm_definition (c_parser
*);
864 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool, bool);
865 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
867 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
868 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
869 static tree
c_parser_struct_declaration (c_parser
*);
870 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
871 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
873 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
875 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
877 struct c_declarator
*);
878 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
879 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
880 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
881 static tree
c_parser_simple_asm_expr (c_parser
*);
882 static tree
c_parser_attributes (c_parser
*);
883 static struct c_type_name
*c_parser_type_name (c_parser
*);
884 static struct c_expr
c_parser_initializer (c_parser
*);
885 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
886 static void c_parser_initelt (c_parser
*);
887 static void c_parser_initval (c_parser
*, struct c_expr
*);
888 static tree
c_parser_compound_statement (c_parser
*);
889 static void c_parser_compound_statement_nostart (c_parser
*);
890 static void c_parser_label (c_parser
*);
891 static void c_parser_statement (c_parser
*);
892 static void c_parser_statement_after_labels (c_parser
*);
893 static void c_parser_if_statement (c_parser
*);
894 static void c_parser_switch_statement (c_parser
*);
895 static void c_parser_while_statement (c_parser
*);
896 static void c_parser_do_statement (c_parser
*);
897 static void c_parser_for_statement (c_parser
*);
898 static tree
c_parser_asm_statement (c_parser
*);
899 static tree
c_parser_asm_operands (c_parser
*, bool);
900 static tree
c_parser_asm_clobbers (c_parser
*);
901 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
902 static struct c_expr
c_parser_conditional_expression (c_parser
*,
904 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
905 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
906 static struct c_expr
c_parser_unary_expression (c_parser
*);
907 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
908 static struct c_expr
c_parser_alignof_expression (c_parser
*);
909 static struct c_expr
c_parser_postfix_expression (c_parser
*);
910 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
911 struct c_type_name
*);
912 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
914 static struct c_expr
c_parser_expression (c_parser
*);
915 static struct c_expr
c_parser_expression_conv (c_parser
*);
916 static VEC(tree
,gc
) *c_parser_expr_list (c_parser
*, bool, bool,
918 static void c_parser_release_expr_list (VEC(tree
,gc
) *);
919 static tree
c_parser_vec_to_tree_list (VEC(tree
,gc
) *);
920 static void c_parser_omp_construct (c_parser
*);
921 static void c_parser_omp_threadprivate (c_parser
*);
922 static void c_parser_omp_barrier (c_parser
*);
923 static void c_parser_omp_flush (c_parser
*);
924 static void c_parser_omp_taskwait (c_parser
*);
926 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
927 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
929 /* These Objective-C parser functions are only ever called when
930 compiling Objective-C. */
931 static void c_parser_objc_class_definition (c_parser
*);
932 static void c_parser_objc_class_instance_variables (c_parser
*);
933 static void c_parser_objc_class_declaration (c_parser
*);
934 static void c_parser_objc_alias_declaration (c_parser
*);
935 static void c_parser_objc_protocol_definition (c_parser
*);
936 static enum tree_code
c_parser_objc_method_type (c_parser
*);
937 static void c_parser_objc_method_definition (c_parser
*);
938 static void c_parser_objc_methodprotolist (c_parser
*);
939 static void c_parser_objc_methodproto (c_parser
*);
940 static tree
c_parser_objc_method_decl (c_parser
*);
941 static tree
c_parser_objc_type_name (c_parser
*);
942 static tree
c_parser_objc_protocol_refs (c_parser
*);
943 static void c_parser_objc_try_catch_statement (c_parser
*);
944 static void c_parser_objc_synchronized_statement (c_parser
*);
945 static tree
c_parser_objc_selector (c_parser
*);
946 static tree
c_parser_objc_selector_arg (c_parser
*);
947 static tree
c_parser_objc_receiver (c_parser
*);
948 static tree
c_parser_objc_message_args (c_parser
*);
949 static tree
c_parser_objc_keywordexpr (c_parser
*);
951 /* Parse a translation unit (C90 6.7, C99 6.9).
954 external-declarations
956 external-declarations:
958 external-declarations external-declaration
967 c_parser_translation_unit (c_parser
*parser
)
969 if (c_parser_next_token_is (parser
, CPP_EOF
))
971 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
972 "ISO C forbids an empty translation unit");
976 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
980 c_parser_external_declaration (parser
);
981 obstack_free (&parser_obstack
, obstack_position
);
983 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
987 /* Parse an external declaration (C90 6.7, C99 6.9).
989 external-declaration:
995 external-declaration:
998 __extension__ external-declaration
1002 external-declaration:
1003 objc-class-definition
1004 objc-class-declaration
1005 objc-alias-declaration
1006 objc-protocol-definition
1007 objc-method-definition
1012 c_parser_external_declaration (c_parser
*parser
)
1015 switch (c_parser_peek_token (parser
)->type
)
1018 switch (c_parser_peek_token (parser
)->keyword
)
1021 ext
= disable_extension_diagnostics ();
1022 c_parser_consume_token (parser
);
1023 c_parser_external_declaration (parser
);
1024 restore_extension_diagnostics (ext
);
1027 c_parser_asm_definition (parser
);
1029 case RID_AT_INTERFACE
:
1030 case RID_AT_IMPLEMENTATION
:
1031 gcc_assert (c_dialect_objc ());
1032 c_parser_objc_class_definition (parser
);
1035 gcc_assert (c_dialect_objc ());
1036 c_parser_objc_class_declaration (parser
);
1039 gcc_assert (c_dialect_objc ());
1040 c_parser_objc_alias_declaration (parser
);
1042 case RID_AT_PROTOCOL
:
1043 gcc_assert (c_dialect_objc ());
1044 c_parser_objc_protocol_definition (parser
);
1047 gcc_assert (c_dialect_objc ());
1048 c_parser_consume_token (parser
);
1049 objc_finish_implementation ();
1056 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1057 "ISO C does not allow extra %<;%> outside of a function");
1058 c_parser_consume_token (parser
);
1061 c_parser_pragma (parser
, pragma_external
);
1065 if (c_dialect_objc ())
1067 c_parser_objc_method_definition (parser
);
1070 /* Else fall through, and yield a syntax error trying to parse
1071 as a declaration or function definition. */
1074 /* A declaration or a function definition. We can only tell
1075 which after parsing the declaration specifiers, if any, and
1076 the first declarator. */
1077 c_parser_declaration_or_fndef (parser
, true, true, false, true);
1083 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1084 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1085 accepted; otherwise (old-style parameter declarations) only other
1086 declarations are accepted. If NESTED is true, we are inside a
1087 function or parsing old-style parameter declarations; any functions
1088 encountered are nested functions and declaration specifiers are
1089 required; otherwise we are at top level and functions are normal
1090 functions and declaration specifiers may be optional. If EMPTY_OK
1091 is true, empty declarations are OK (subject to all other
1092 constraints); otherwise (old-style parameter declarations) they are
1093 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1094 may start with attributes; otherwise they may not.
1097 declaration-specifiers init-declarator-list[opt] ;
1099 function-definition:
1100 declaration-specifiers[opt] declarator declaration-list[opt]
1105 declaration-list declaration
1107 init-declarator-list:
1109 init-declarator-list , init-declarator
1112 declarator simple-asm-expr[opt] attributes[opt]
1113 declarator simple-asm-expr[opt] attributes[opt] = initializer
1117 nested-function-definition:
1118 declaration-specifiers declarator declaration-list[opt]
1121 The simple-asm-expr and attributes are GNU extensions.
1123 This function does not handle __extension__; that is handled in its
1124 callers. ??? Following the old parser, __extension__ may start
1125 external declarations, declarations in functions and declarations
1126 at the start of "for" loops, but not old-style parameter
1129 C99 requires declaration specifiers in a function definition; the
1130 absence is diagnosed through the diagnosis of implicit int. In GNU
1131 C we also allow but diagnose declarations without declaration
1132 specifiers, but only at top level (elsewhere they conflict with
1138 threadprivate-directive */
1141 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
, bool empty_ok
,
1142 bool nested
, bool start_attr_ok
)
1144 struct c_declspecs
*specs
;
1146 tree all_prefix_attrs
;
1147 bool diagnosed_no_specs
= false;
1148 location_t here
= c_parser_peek_token (parser
)->location
;
1150 specs
= build_null_declspecs ();
1151 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
);
1154 c_parser_skip_to_end_of_block_or_statement (parser
);
1157 if (nested
&& !specs
->declspecs_seen_p
)
1159 c_parser_error (parser
, "expected declaration specifiers");
1160 c_parser_skip_to_end_of_block_or_statement (parser
);
1163 finish_declspecs (specs
);
1164 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1170 shadow_tag_warned (specs
, 1);
1171 pedwarn (here
, 0, "empty declaration");
1173 c_parser_consume_token (parser
);
1176 pending_xref_error ();
1177 prefix_attrs
= specs
->attrs
;
1178 all_prefix_attrs
= prefix_attrs
;
1179 specs
->attrs
= NULL_TREE
;
1182 struct c_declarator
*declarator
;
1185 /* Declaring either one or more declarators (in which case we
1186 should diagnose if there were no declaration specifiers) or a
1187 function definition (in which case the diagnostic for
1188 implicit int suffices). */
1189 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1190 C_DTR_NORMAL
, &dummy
);
1191 if (declarator
== NULL
)
1193 c_parser_skip_to_end_of_block_or_statement (parser
);
1196 if (c_parser_next_token_is (parser
, CPP_EQ
)
1197 || c_parser_next_token_is (parser
, CPP_COMMA
)
1198 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1199 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1200 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1202 tree asm_name
= NULL_TREE
;
1203 tree postfix_attrs
= NULL_TREE
;
1204 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1206 diagnosed_no_specs
= true;
1207 pedwarn (here
, 0, "data definition has no type or storage class");
1209 /* Having seen a data definition, there cannot now be a
1210 function definition. */
1212 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1213 asm_name
= c_parser_simple_asm_expr (parser
);
1214 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1215 postfix_attrs
= c_parser_attributes (parser
);
1216 if (c_parser_next_token_is (parser
, CPP_EQ
))
1220 c_parser_consume_token (parser
);
1221 /* The declaration of the variable is in effect while
1222 its initializer is parsed. */
1223 d
= start_decl (declarator
, specs
, true,
1224 chainon (postfix_attrs
, all_prefix_attrs
));
1226 d
= error_mark_node
;
1227 start_init (d
, asm_name
, global_bindings_p ());
1228 init
= c_parser_initializer (parser
);
1230 if (d
!= error_mark_node
)
1232 maybe_warn_string_init (TREE_TYPE (d
), init
);
1233 finish_decl (d
, init
.value
, init
.original_type
, asm_name
);
1238 tree d
= start_decl (declarator
, specs
, false,
1239 chainon (postfix_attrs
,
1242 finish_decl (d
, NULL_TREE
, NULL_TREE
, asm_name
);
1244 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1246 c_parser_consume_token (parser
);
1247 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1248 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1251 all_prefix_attrs
= prefix_attrs
;
1254 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1256 c_parser_consume_token (parser
);
1261 c_parser_error (parser
, "expected %<,%> or %<;%>");
1262 c_parser_skip_to_end_of_block_or_statement (parser
);
1268 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1269 "%<asm%> or %<__attribute__%>");
1270 c_parser_skip_to_end_of_block_or_statement (parser
);
1273 /* Function definition (nested or otherwise). */
1276 pedwarn (here
, OPT_pedantic
, "ISO C forbids nested functions");
1277 c_push_function_context ();
1279 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1281 /* This can appear in many cases looking nothing like a
1282 function definition, so we don't give a more specific
1283 error suggesting there was one. */
1284 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1285 "or %<__attribute__%>");
1287 c_pop_function_context ();
1290 /* Parse old-style parameter declarations. ??? Attributes are
1291 not allowed to start declaration specifiers here because of a
1292 syntax conflict between a function declaration with attribute
1293 suffix and a function definition with an attribute prefix on
1294 first old-style parameter declaration. Following the old
1295 parser, they are not accepted on subsequent old-style
1296 parameter declarations either. However, there is no
1297 ambiguity after the first declaration, nor indeed on the
1298 first as long as we don't allow postfix attributes after a
1299 declarator with a nonempty identifier list in a definition;
1300 and postfix attributes have never been accepted here in
1301 function definitions either. */
1302 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1303 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1304 c_parser_declaration_or_fndef (parser
, false, false, true, false);
1305 store_parm_decls ();
1306 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1307 = c_parser_peek_token (parser
)->location
;
1308 fnbody
= c_parser_compound_statement (parser
);
1311 tree decl
= current_function_decl
;
1314 c_pop_function_context ();
1315 add_stmt (build_stmt (DECL_EXPR
, decl
));
1326 /* Parse an asm-definition (asm() outside a function body). This is a
1334 c_parser_asm_definition (c_parser
*parser
)
1336 tree asm_str
= c_parser_simple_asm_expr (parser
);
1338 cgraph_add_asm_node (asm_str
);
1339 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1342 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1343 6.7), adding them to SPECS (which may already include some).
1344 Storage class specifiers are accepted iff SCSPEC_OK; type
1345 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1346 the start iff START_ATTR_OK.
1348 declaration-specifiers:
1349 storage-class-specifier declaration-specifiers[opt]
1350 type-specifier declaration-specifiers[opt]
1351 type-qualifier declaration-specifiers[opt]
1352 function-specifier declaration-specifiers[opt]
1354 Function specifiers (inline) are from C99, and are currently
1355 handled as storage class specifiers, as is __thread.
1357 C90 6.5.1, C99 6.7.1:
1358 storage-class-specifier:
1369 C90 6.5.2, C99 6.7.2:
1382 [_Imaginary removed in C99 TC2]
1383 struct-or-union-specifier
1387 (_Bool and _Complex are new in C99.)
1389 C90 6.5.3, C99 6.7.3:
1396 (restrict is new in C99.)
1400 declaration-specifiers:
1401 attributes declaration-specifiers[opt]
1403 storage-class-specifier:
1415 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1416 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1421 class-name objc-protocol-refs[opt]
1422 typedef-name objc-protocol-refs
1427 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1428 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
)
1430 bool attrs_ok
= start_attr_ok
;
1431 bool seen_type
= specs
->type_seen_p
;
1432 while (c_parser_next_token_is (parser
, CPP_NAME
)
1433 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1434 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1436 struct c_typespec t
;
1438 if (c_parser_next_token_is (parser
, CPP_NAME
))
1440 tree value
= c_parser_peek_token (parser
)->value
;
1441 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1442 /* This finishes the specifiers unless a type name is OK, it
1443 is declared as a type name and a type name hasn't yet
1445 if (!typespec_ok
|| seen_type
1446 || (kind
!= C_ID_TYPENAME
&& kind
!= C_ID_CLASSNAME
))
1448 c_parser_consume_token (parser
);
1451 if (kind
== C_ID_TYPENAME
1452 && (!c_dialect_objc ()
1453 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
1455 t
.kind
= ctsk_typedef
;
1456 /* For a typedef name, record the meaning, not the name.
1457 In case of 'foo foo, bar;'. */
1458 t
.spec
= lookup_name (value
);
1460 t
.expr_const_operands
= true;
1464 tree proto
= NULL_TREE
;
1465 gcc_assert (c_dialect_objc ());
1467 if (c_parser_next_token_is (parser
, CPP_LESS
))
1468 proto
= c_parser_objc_protocol_refs (parser
);
1469 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1471 t
.expr_const_operands
= true;
1473 declspecs_add_type (specs
, t
);
1476 if (c_parser_next_token_is (parser
, CPP_LESS
))
1478 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1479 nisse@lysator.liu.se. */
1481 gcc_assert (c_dialect_objc ());
1482 if (!typespec_ok
|| seen_type
)
1484 proto
= c_parser_objc_protocol_refs (parser
);
1486 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1488 t
.expr_const_operands
= true;
1489 declspecs_add_type (specs
, t
);
1492 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1493 switch (c_parser_peek_token (parser
)->keyword
)
1505 /* TODO: Distinguish between function specifiers (inline)
1506 and storage class specifiers, either here or in
1507 declspecs_add_scspec. */
1508 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1509 c_parser_consume_token (parser
);
1532 if (c_dialect_objc ())
1533 parser
->objc_need_raw_identifier
= true;
1534 t
.kind
= ctsk_resword
;
1535 t
.spec
= c_parser_peek_token (parser
)->value
;
1537 t
.expr_const_operands
= true;
1538 declspecs_add_type (specs
, t
);
1539 c_parser_consume_token (parser
);
1546 t
= c_parser_enum_specifier (parser
);
1547 declspecs_add_type (specs
, t
);
1555 t
= c_parser_struct_or_union_specifier (parser
);
1556 invoke_plugin_callbacks (PLUGIN_FINISH_TYPE
, t
.spec
);
1557 declspecs_add_type (specs
, t
);
1560 /* ??? The old parser rejected typeof after other type
1561 specifiers, but is a syntax error the best way of
1563 if (!typespec_ok
|| seen_type
)
1567 t
= c_parser_typeof_specifier (parser
);
1568 declspecs_add_type (specs
, t
);
1574 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1575 c_parser_consume_token (parser
);
1580 attrs
= c_parser_attributes (parser
);
1581 declspecs_add_attrs (specs
, attrs
);
1590 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1593 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1594 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1595 enum attributes[opt] identifier
1597 The form with trailing comma is new in C99. The forms with
1598 attributes are GNU extensions. In GNU C, we accept any expression
1599 without commas in the syntax (assignment expressions, not just
1600 conditional expressions); assignment expressions will be diagnosed
1605 enumerator-list , enumerator
1608 enumeration-constant
1609 enumeration-constant = constant-expression
1612 static struct c_typespec
1613 c_parser_enum_specifier (c_parser
*parser
)
1615 struct c_typespec ret
;
1617 tree ident
= NULL_TREE
;
1618 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1619 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1620 c_parser_consume_token (parser
);
1621 attrs
= c_parser_attributes (parser
);
1622 /* Set the location in case we create a decl now. */
1623 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1624 if (c_parser_next_token_is (parser
, CPP_NAME
))
1626 ident
= c_parser_peek_token (parser
)->value
;
1627 ident_loc
= c_parser_peek_token (parser
)->location
;
1628 c_parser_consume_token (parser
);
1630 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1632 /* Parse an enum definition. */
1633 struct c_enum_contents the_enum
;
1634 tree type
= start_enum (&the_enum
, ident
);
1636 /* We chain the enumerators in reverse order, then put them in
1637 forward order at the end. */
1638 tree values
= NULL_TREE
;
1639 c_parser_consume_token (parser
);
1647 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1648 location_t value_loc
;
1649 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1651 c_parser_error (parser
, "expected identifier");
1652 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1653 values
= error_mark_node
;
1656 token
= c_parser_peek_token (parser
);
1657 enum_id
= token
->value
;
1658 /* Set the location in case we create a decl now. */
1659 c_parser_set_source_position_from_token (token
);
1660 value_loc
= token
->location
;
1661 c_parser_consume_token (parser
);
1662 if (c_parser_next_token_is (parser
, CPP_EQ
))
1664 c_parser_consume_token (parser
);
1665 value_loc
= c_parser_peek_token (parser
)->location
;
1666 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1669 enum_value
= NULL_TREE
;
1670 enum_decl
= build_enumerator (&the_enum
, enum_id
, enum_value
,
1672 TREE_CHAIN (enum_decl
) = values
;
1675 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1677 comma_loc
= c_parser_peek_token (parser
)->location
;
1679 c_parser_consume_token (parser
);
1681 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1683 if (seen_comma
&& !flag_isoc99
)
1684 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
1685 c_parser_consume_token (parser
);
1690 c_parser_error (parser
, "expected %<,%> or %<}%>");
1691 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1692 values
= error_mark_node
;
1696 postfix_attrs
= c_parser_attributes (parser
);
1697 ret
.spec
= finish_enum (type
, nreverse (values
),
1698 chainon (attrs
, postfix_attrs
));
1699 ret
.kind
= ctsk_tagdef
;
1700 ret
.expr
= NULL_TREE
;
1701 ret
.expr_const_operands
= true;
1706 c_parser_error (parser
, "expected %<{%>");
1707 ret
.spec
= error_mark_node
;
1708 ret
.kind
= ctsk_tagref
;
1709 ret
.expr
= NULL_TREE
;
1710 ret
.expr_const_operands
= true;
1713 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1714 /* In ISO C, enumerated types can be referred to only if already
1716 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1719 pedwarn (ident_loc
, OPT_pedantic
,
1720 "ISO C forbids forward references to %<enum%> types");
1725 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1727 struct-or-union-specifier:
1728 struct-or-union attributes[opt] identifier[opt]
1729 { struct-contents } attributes[opt]
1730 struct-or-union attributes[opt] identifier
1733 struct-declaration-list
1735 struct-declaration-list:
1736 struct-declaration ;
1737 struct-declaration-list struct-declaration ;
1744 struct-declaration-list struct-declaration
1746 struct-declaration-list:
1747 struct-declaration-list ;
1750 (Note that in the syntax here, unlike that in ISO C, the semicolons
1751 are included here rather than in struct-declaration, in order to
1752 describe the syntax with extra semicolons and missing semicolon at
1757 struct-declaration-list:
1758 @defs ( class-name )
1760 (Note this does not include a trailing semicolon, but can be
1761 followed by further declarations, and gets a pedwarn-if-pedantic
1762 when followed by a semicolon.) */
1764 static struct c_typespec
1765 c_parser_struct_or_union_specifier (c_parser
*parser
)
1767 struct c_typespec ret
;
1769 tree ident
= NULL_TREE
;
1770 enum tree_code code
;
1771 switch (c_parser_peek_token (parser
)->keyword
)
1782 c_parser_consume_token (parser
);
1783 attrs
= c_parser_attributes (parser
);
1784 /* Set the location in case we create a decl now. */
1785 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1786 if (c_parser_next_token_is (parser
, CPP_NAME
))
1788 ident
= c_parser_peek_token (parser
)->value
;
1789 c_parser_consume_token (parser
);
1791 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1793 /* Parse a struct or union definition. Start the scope of the
1794 tag before parsing components. */
1795 tree type
= start_struct (code
, ident
);
1797 /* We chain the components in reverse order, then put them in
1798 forward order at the end. Each struct-declaration may
1799 declare multiple components (comma-separated), so we must use
1800 chainon to join them, although when parsing each
1801 struct-declaration we can use TREE_CHAIN directly.
1803 The theory behind all this is that there will be more
1804 semicolon separated fields than comma separated fields, and
1805 so we'll be minimizing the number of node traversals required
1807 tree contents
= NULL_TREE
;
1808 c_parser_consume_token (parser
);
1809 /* Handle the Objective-C @defs construct,
1810 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1811 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1814 gcc_assert (c_dialect_objc ());
1815 c_parser_consume_token (parser
);
1816 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1818 if (c_parser_next_token_is (parser
, CPP_NAME
)
1819 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1821 name
= c_parser_peek_token (parser
)->value
;
1822 c_parser_consume_token (parser
);
1826 c_parser_error (parser
, "expected class name");
1827 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1830 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1832 contents
= nreverse (objc_get_class_ivars (name
));
1835 /* Parse the struct-declarations and semicolons. Problems with
1836 semicolons are diagnosed here; empty structures are diagnosed
1841 /* Parse any stray semicolon. */
1842 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1844 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1845 "extra semicolon in struct or union specified");
1846 c_parser_consume_token (parser
);
1849 /* Stop if at the end of the struct or union contents. */
1850 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1852 c_parser_consume_token (parser
);
1855 /* Accept #pragmas at struct scope. */
1856 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1858 c_parser_pragma (parser
, pragma_external
);
1861 /* Parse some comma-separated declarations, but not the
1862 trailing semicolon if any. */
1863 decls
= c_parser_struct_declaration (parser
);
1864 contents
= chainon (decls
, contents
);
1865 /* If no semicolon follows, either we have a parse error or
1866 are at the end of the struct or union and should
1868 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1869 c_parser_consume_token (parser
);
1872 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1873 pedwarn (c_parser_peek_token (parser
)->location
, 0,
1874 "no semicolon at end of struct or union");
1877 c_parser_error (parser
, "expected %<;%>");
1878 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1883 postfix_attrs
= c_parser_attributes (parser
);
1884 ret
.spec
= finish_struct (type
, nreverse (contents
),
1885 chainon (attrs
, postfix_attrs
));
1886 ret
.kind
= ctsk_tagdef
;
1887 ret
.expr
= NULL_TREE
;
1888 ret
.expr_const_operands
= true;
1893 c_parser_error (parser
, "expected %<{%>");
1894 ret
.spec
= error_mark_node
;
1895 ret
.kind
= ctsk_tagref
;
1896 ret
.expr
= NULL_TREE
;
1897 ret
.expr_const_operands
= true;
1900 ret
= parser_xref_tag (code
, ident
);
1904 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1905 the trailing semicolon.
1908 specifier-qualifier-list struct-declarator-list
1910 specifier-qualifier-list:
1911 type-specifier specifier-qualifier-list[opt]
1912 type-qualifier specifier-qualifier-list[opt]
1913 attributes specifier-qualifier-list[opt]
1915 struct-declarator-list:
1917 struct-declarator-list , attributes[opt] struct-declarator
1920 declarator attributes[opt]
1921 declarator[opt] : constant-expression attributes[opt]
1926 __extension__ struct-declaration
1927 specifier-qualifier-list
1929 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1930 of attributes where shown is a GNU extension. In GNU C, we accept
1931 any expression without commas in the syntax (assignment
1932 expressions, not just conditional expressions); assignment
1933 expressions will be diagnosed as non-constant. */
1936 c_parser_struct_declaration (c_parser
*parser
)
1938 struct c_declspecs
*specs
;
1940 tree all_prefix_attrs
;
1942 location_t decl_loc
;
1943 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
1947 ext
= disable_extension_diagnostics ();
1948 c_parser_consume_token (parser
);
1949 decl
= c_parser_struct_declaration (parser
);
1950 restore_extension_diagnostics (ext
);
1953 specs
= build_null_declspecs ();
1954 decl_loc
= c_parser_peek_token (parser
)->location
;
1955 c_parser_declspecs (parser
, specs
, false, true, true);
1958 if (!specs
->declspecs_seen_p
)
1960 c_parser_error (parser
, "expected specifier-qualifier-list");
1963 finish_declspecs (specs
);
1964 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1967 if (!specs
->type_seen_p
)
1969 pedwarn (decl_loc
, OPT_pedantic
,
1970 "ISO C forbids member declarations with no members");
1971 shadow_tag_warned (specs
, pedantic
);
1976 /* Support for unnamed structs or unions as members of
1977 structs or unions (which is [a] useful and [b] supports
1981 ret
= grokfield (c_parser_peek_token (parser
)->location
,
1982 build_id_declarator (NULL_TREE
), specs
,
1985 decl_attributes (&ret
, attrs
, 0);
1989 pending_xref_error ();
1990 prefix_attrs
= specs
->attrs
;
1991 all_prefix_attrs
= prefix_attrs
;
1992 specs
->attrs
= NULL_TREE
;
1996 /* Declaring one or more declarators or un-named bit-fields. */
1997 struct c_declarator
*declarator
;
1999 if (c_parser_next_token_is (parser
, CPP_COLON
))
2000 declarator
= build_id_declarator (NULL_TREE
);
2002 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2003 C_DTR_NORMAL
, &dummy
);
2004 if (declarator
== NULL
)
2006 c_parser_skip_to_end_of_block_or_statement (parser
);
2009 if (c_parser_next_token_is (parser
, CPP_COLON
)
2010 || c_parser_next_token_is (parser
, CPP_COMMA
)
2011 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2012 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2013 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2015 tree postfix_attrs
= NULL_TREE
;
2016 tree width
= NULL_TREE
;
2018 if (c_parser_next_token_is (parser
, CPP_COLON
))
2020 c_parser_consume_token (parser
);
2021 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2023 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2024 postfix_attrs
= c_parser_attributes (parser
);
2025 d
= grokfield (c_parser_peek_token (parser
)->location
,
2026 declarator
, specs
, width
, &all_prefix_attrs
);
2027 decl_attributes (&d
, chainon (postfix_attrs
,
2028 all_prefix_attrs
), 0);
2029 TREE_CHAIN (d
) = decls
;
2031 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2032 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2035 all_prefix_attrs
= prefix_attrs
;
2036 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2037 c_parser_consume_token (parser
);
2038 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2039 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2041 /* Semicolon consumed in caller. */
2046 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2052 c_parser_error (parser
,
2053 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2054 "%<__attribute__%>");
2061 /* Parse a typeof specifier (a GNU extension).
2064 typeof ( expression )
2065 typeof ( type-name )
2068 static struct c_typespec
2069 c_parser_typeof_specifier (c_parser
*parser
)
2071 struct c_typespec ret
;
2072 ret
.kind
= ctsk_typeof
;
2073 ret
.spec
= error_mark_node
;
2074 ret
.expr
= NULL_TREE
;
2075 ret
.expr_const_operands
= true;
2076 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2077 c_parser_consume_token (parser
);
2080 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2086 if (c_parser_next_token_starts_typename (parser
))
2088 struct c_type_name
*type
= c_parser_type_name (parser
);
2093 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2094 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2100 location_t here
= c_parser_peek_token (parser
)->location
;
2101 struct c_expr expr
= c_parser_expression (parser
);
2104 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2105 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2106 error_at (here
, "%<typeof%> applied to a bit-field");
2107 ret
.spec
= TREE_TYPE (expr
.value
);
2108 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2109 /* This is returned with the type so that when the type is
2110 evaluated, this can be evaluated. */
2112 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2113 pop_maybe_used (was_vm
);
2115 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2119 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2120 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2121 be redeclared; otherwise it may not. KIND indicates which kind of
2122 declarator is wanted. Returns a valid declarator except in the
2123 case of a syntax error in which case NULL is returned. *SEEN_ID is
2124 set to true if an identifier being declared is seen; this is used
2125 to diagnose bad forms of abstract array declarators and to
2126 determine whether an identifier list is syntactically permitted.
2129 pointer[opt] direct-declarator
2133 ( attributes[opt] declarator )
2134 direct-declarator array-declarator
2135 direct-declarator ( parameter-type-list )
2136 direct-declarator ( identifier-list[opt] )
2139 * type-qualifier-list[opt]
2140 * type-qualifier-list[opt] pointer
2142 type-qualifier-list:
2145 type-qualifier-list type-qualifier
2146 type-qualifier-list attributes
2148 parameter-type-list:
2150 parameter-list , ...
2153 parameter-declaration
2154 parameter-list , parameter-declaration
2156 parameter-declaration:
2157 declaration-specifiers declarator attributes[opt]
2158 declaration-specifiers abstract-declarator[opt] attributes[opt]
2162 identifier-list , identifier
2164 abstract-declarator:
2166 pointer[opt] direct-abstract-declarator
2168 direct-abstract-declarator:
2169 ( attributes[opt] abstract-declarator )
2170 direct-abstract-declarator[opt] array-declarator
2171 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2176 direct-declarator ( parameter-forward-declarations
2177 parameter-type-list[opt] )
2179 direct-abstract-declarator:
2180 direct-abstract-declarator[opt] ( parameter-forward-declarations
2181 parameter-type-list[opt] )
2183 parameter-forward-declarations:
2185 parameter-forward-declarations parameter-list ;
2187 The uses of attributes shown above are GNU extensions.
2189 Some forms of array declarator are not included in C99 in the
2190 syntax for abstract declarators; these are disallowed elsewhere.
2191 This may be a defect (DR#289).
2193 This function also accepts an omitted abstract declarator as being
2194 an abstract declarator, although not part of the formal syntax. */
2196 static struct c_declarator
*
2197 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2200 /* Parse any initial pointer part. */
2201 if (c_parser_next_token_is (parser
, CPP_MULT
))
2203 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2204 struct c_declarator
*inner
;
2205 c_parser_consume_token (parser
);
2206 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2207 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2211 return make_pointer_declarator (quals_attrs
, inner
);
2213 /* Now we have a direct declarator, direct abstract declarator or
2214 nothing (which counts as a direct abstract declarator here). */
2215 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2218 /* Parse a direct declarator or direct abstract declarator; arguments
2219 as c_parser_declarator. */
2221 static struct c_declarator
*
2222 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2225 /* The direct declarator must start with an identifier (possibly
2226 omitted) or a parenthesized declarator (possibly abstract). In
2227 an ordinary declarator, initial parentheses must start a
2228 parenthesized declarator. In an abstract declarator or parameter
2229 declarator, they could start a parenthesized declarator or a
2230 parameter list. To tell which, the open parenthesis and any
2231 following attributes must be read. If a declaration specifier
2232 follows, then it is a parameter list; if the specifier is a
2233 typedef name, there might be an ambiguity about redeclaring it,
2234 which is resolved in the direction of treating it as a typedef
2235 name. If a close parenthesis follows, it is also an empty
2236 parameter list, as the syntax does not permit empty abstract
2237 declarators. Otherwise, it is a parenthesized declarator (in
2238 which case the analysis may be repeated inside it, recursively).
2240 ??? There is an ambiguity in a parameter declaration "int
2241 (__attribute__((foo)) x)", where x is not a typedef name: it
2242 could be an abstract declarator for a function, or declare x with
2243 parentheses. The proper resolution of this ambiguity needs
2244 documenting. At present we follow an accident of the old
2245 parser's implementation, whereby the first parameter must have
2246 some declaration specifiers other than just attributes. Thus as
2247 a parameter declaration it is treated as a parenthesized
2248 parameter named x, and as an abstract declarator it is
2251 ??? Also following the old parser, attributes inside an empty
2252 parameter list are ignored, making it a list not yielding a
2253 prototype, rather than giving an error or making it have one
2254 parameter with implicit type int.
2256 ??? Also following the old parser, typedef names may be
2257 redeclared in declarators, but not Objective-C class names. */
2259 if (kind
!= C_DTR_ABSTRACT
2260 && c_parser_next_token_is (parser
, CPP_NAME
)
2262 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2263 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2265 struct c_declarator
*inner
2266 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2268 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2269 c_parser_consume_token (parser
);
2270 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2273 if (kind
!= C_DTR_NORMAL
2274 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2276 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2277 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2280 /* Either we are at the end of an abstract declarator, or we have
2283 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2286 struct c_declarator
*inner
;
2287 c_parser_consume_token (parser
);
2288 attrs
= c_parser_attributes (parser
);
2289 if (kind
!= C_DTR_NORMAL
2290 && (c_parser_next_token_starts_declspecs (parser
)
2291 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2293 struct c_arg_info
*args
2294 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2301 = build_function_declarator (args
,
2302 build_id_declarator (NULL_TREE
));
2303 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2307 /* A parenthesized declarator. */
2308 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2309 if (inner
!= NULL
&& attrs
!= NULL
)
2310 inner
= build_attrs_declarator (attrs
, inner
);
2311 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2313 c_parser_consume_token (parser
);
2317 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2321 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2328 if (kind
== C_DTR_NORMAL
)
2330 c_parser_error (parser
, "expected identifier or %<(%>");
2334 return build_id_declarator (NULL_TREE
);
2338 /* Parse part of a direct declarator or direct abstract declarator,
2339 given that some (in INNER) has already been parsed; ID_PRESENT is
2340 true if an identifier is present, false for an abstract
2343 static struct c_declarator
*
2344 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2345 struct c_declarator
*inner
)
2347 /* Parse a sequence of array declarators and parameter lists. */
2348 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2350 struct c_declarator
*declarator
;
2351 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2355 c_parser_consume_token (parser
);
2356 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2357 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2359 c_parser_consume_token (parser
);
2360 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2361 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2362 if (!quals_attrs
->declspecs_seen_p
)
2364 /* If "static" is present, there must be an array dimension.
2365 Otherwise, there may be a dimension, "*", or no
2370 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2374 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2379 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2381 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2385 c_parser_consume_token (parser
);
2390 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2396 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2399 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2400 c_parser_consume_token (parser
);
2403 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2407 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2409 if (declarator
== NULL
)
2411 inner
= set_array_declarator_inner (declarator
, inner
);
2412 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2414 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2417 struct c_arg_info
*args
;
2418 c_parser_consume_token (parser
);
2419 attrs
= c_parser_attributes (parser
);
2420 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2425 inner
= build_function_declarator (args
, inner
);
2426 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2432 /* Parse a parameter list or identifier list, including the closing
2433 parenthesis but not the opening one. ATTRS are the attributes at
2434 the start of the list. ID_LIST_OK is true if an identifier list is
2435 acceptable; such a list must not have attributes at the start. */
2437 static struct c_arg_info
*
2438 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2441 declare_parm_level ();
2442 /* If the list starts with an identifier, it is an identifier list.
2443 Otherwise, it is either a prototype list or an empty list. */
2446 && c_parser_next_token_is (parser
, CPP_NAME
)
2447 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2449 tree list
= NULL_TREE
, *nextp
= &list
;
2450 while (c_parser_next_token_is (parser
, CPP_NAME
)
2451 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2453 *nextp
= build_tree_list (NULL_TREE
,
2454 c_parser_peek_token (parser
)->value
);
2455 nextp
= & TREE_CHAIN (*nextp
);
2456 c_parser_consume_token (parser
);
2457 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2459 c_parser_consume_token (parser
);
2460 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2462 c_parser_error (parser
, "expected identifier");
2466 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2468 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2473 ret
->pending_sizes
= 0;
2474 ret
->had_vla_unspec
= 0;
2475 c_parser_consume_token (parser
);
2481 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2489 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
2495 /* Parse a parameter list (possibly empty), including the closing
2496 parenthesis but not the opening one. ATTRS are the attributes at
2497 the start of the list. */
2499 static struct c_arg_info
*
2500 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
2502 bool good_parm
= false;
2503 /* ??? Following the old parser, forward parameter declarations may
2504 use abstract declarators, and if no real parameter declarations
2505 follow the forward declarations then this is not diagnosed. Also
2506 note as above that attributes are ignored as the only contents of
2507 the parentheses, or as the only contents after forward
2509 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2511 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2516 ret
->pending_sizes
= 0;
2517 ret
->had_vla_unspec
= 0;
2518 c_parser_consume_token (parser
);
2521 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2523 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2527 ret
->pending_sizes
= 0;
2528 ret
->had_vla_unspec
= 0;
2529 /* Suppress -Wold-style-definition for this case. */
2530 ret
->types
= error_mark_node
;
2531 error_at (c_parser_peek_token (parser
)->location
,
2532 "ISO C requires a named argument before %<...%>");
2533 c_parser_consume_token (parser
);
2534 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2536 c_parser_consume_token (parser
);
2541 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2546 /* Nonempty list of parameters, either terminated with semicolon
2547 (forward declarations; recurse) or with close parenthesis (normal
2548 function) or with ", ... )" (variadic function). */
2551 /* Parse a parameter. */
2552 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2557 push_parm_decl (parm
);
2559 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2562 c_parser_consume_token (parser
);
2563 mark_forward_parm_decls ();
2564 new_attrs
= c_parser_attributes (parser
);
2565 return c_parser_parms_list_declarator (parser
, new_attrs
);
2567 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2569 c_parser_consume_token (parser
);
2571 return get_parm_info (false);
2574 struct c_arg_info
*ret
2575 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2580 ret
->pending_sizes
= 0;
2581 ret
->had_vla_unspec
= 0;
2585 if (!c_parser_require (parser
, CPP_COMMA
,
2586 "expected %<;%>, %<,%> or %<)%>"))
2588 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2589 get_pending_sizes ();
2592 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2594 c_parser_consume_token (parser
);
2595 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2597 c_parser_consume_token (parser
);
2599 return get_parm_info (true);
2602 struct c_arg_info
*ret
2603 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2608 ret
->pending_sizes
= 0;
2609 ret
->had_vla_unspec
= 0;
2615 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2617 get_pending_sizes ();
2624 /* Parse a parameter declaration. ATTRS are the attributes at the
2625 start of the declaration if it is the first parameter. */
2627 static struct c_parm
*
2628 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2630 struct c_declspecs
*specs
;
2631 struct c_declarator
*declarator
;
2633 tree postfix_attrs
= NULL_TREE
;
2635 if (!c_parser_next_token_starts_declspecs (parser
))
2637 /* ??? In some Objective-C cases '...' isn't applicable so there
2638 should be a different message. */
2639 c_parser_error (parser
,
2640 "expected declaration specifiers or %<...%>");
2641 c_parser_skip_to_end_of_parameter (parser
);
2644 specs
= build_null_declspecs ();
2647 declspecs_add_attrs (specs
, attrs
);
2650 c_parser_declspecs (parser
, specs
, true, true, true);
2651 finish_declspecs (specs
);
2652 pending_xref_error ();
2653 prefix_attrs
= specs
->attrs
;
2654 specs
->attrs
= NULL_TREE
;
2655 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2656 C_DTR_PARM
, &dummy
);
2657 if (declarator
== NULL
)
2659 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2662 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2663 postfix_attrs
= c_parser_attributes (parser
);
2664 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2668 /* Parse a string literal in an asm expression. It should not be
2669 translated, and wide string literals are an error although
2670 permitted by the syntax. This is a GNU extension.
2675 ??? At present, following the old parser, the caller needs to have
2676 set lex_untranslated_string to 1. It would be better to follow the
2677 C++ parser rather than using this kludge. */
2680 c_parser_asm_string_literal (c_parser
*parser
)
2683 if (c_parser_next_token_is (parser
, CPP_STRING
))
2685 str
= c_parser_peek_token (parser
)->value
;
2686 c_parser_consume_token (parser
);
2688 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2690 error_at (c_parser_peek_token (parser
)->location
,
2691 "wide string literal in %<asm%>");
2692 str
= build_string (1, "");
2693 c_parser_consume_token (parser
);
2697 c_parser_error (parser
, "expected string literal");
2703 /* Parse a simple asm expression. This is used in restricted
2704 contexts, where a full expression with inputs and outputs does not
2705 make sense. This is a GNU extension.
2708 asm ( asm-string-literal )
2712 c_parser_simple_asm_expr (c_parser
*parser
)
2715 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2716 /* ??? Follow the C++ parser rather than using the
2717 lex_untranslated_string kludge. */
2718 parser
->lex_untranslated_string
= true;
2719 c_parser_consume_token (parser
);
2720 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2722 parser
->lex_untranslated_string
= false;
2725 str
= c_parser_asm_string_literal (parser
);
2726 parser
->lex_untranslated_string
= false;
2727 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2729 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2735 /* Parse (possibly empty) attributes. This is a GNU extension.
2739 attributes attribute
2742 __attribute__ ( ( attribute-list ) )
2746 attribute_list , attrib
2751 any-word ( identifier )
2752 any-word ( identifier , nonempty-expr-list )
2753 any-word ( expr-list )
2755 where the "identifier" must not be declared as a type, and
2756 "any-word" may be any identifier (including one declared as a
2757 type), a reserved word storage class specifier, type specifier or
2758 type qualifier. ??? This still leaves out most reserved keywords
2759 (following the old parser), shouldn't we include them, and why not
2760 allow identifiers declared as types to start the arguments? */
2763 c_parser_attributes (c_parser
*parser
)
2765 tree attrs
= NULL_TREE
;
2766 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2768 /* ??? Follow the C++ parser rather than using the
2769 lex_untranslated_string kludge. */
2770 parser
->lex_untranslated_string
= true;
2771 c_parser_consume_token (parser
);
2772 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2774 parser
->lex_untranslated_string
= false;
2777 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2779 parser
->lex_untranslated_string
= false;
2780 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2783 /* Parse the attribute list. */
2784 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2785 || c_parser_next_token_is (parser
, CPP_NAME
)
2786 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2788 tree attr
, attr_name
, attr_args
;
2789 VEC(tree
,gc
) *expr_list
;
2790 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2792 c_parser_consume_token (parser
);
2795 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2797 /* ??? See comment above about what keywords are
2800 switch (c_parser_peek_token (parser
)->keyword
)
2837 /* Accept __attribute__((__const)) as __attribute__((const))
2840 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
2843 attr_name
= c_parser_peek_token (parser
)->value
;
2844 c_parser_consume_token (parser
);
2845 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2847 attr
= build_tree_list (attr_name
, NULL_TREE
);
2848 attrs
= chainon (attrs
, attr
);
2851 c_parser_consume_token (parser
);
2852 /* Parse the attribute contents. If they start with an
2853 identifier which is followed by a comma or close
2854 parenthesis, then the arguments start with that
2855 identifier; otherwise they are an expression list. */
2856 if (c_parser_next_token_is (parser
, CPP_NAME
)
2857 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2858 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2859 || (c_parser_peek_2nd_token (parser
)->type
2860 == CPP_CLOSE_PAREN
)))
2862 tree arg1
= c_parser_peek_token (parser
)->value
;
2863 c_parser_consume_token (parser
);
2864 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2865 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2869 c_parser_consume_token (parser
);
2870 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
2871 tree_list
= c_parser_vec_to_tree_list (expr_list
);
2872 attr_args
= tree_cons (NULL_TREE
, arg1
, tree_list
);
2873 c_parser_release_expr_list (expr_list
);
2878 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2879 attr_args
= NULL_TREE
;
2882 expr_list
= c_parser_expr_list (parser
, false, true, NULL
);
2883 attr_args
= c_parser_vec_to_tree_list (expr_list
);
2884 c_parser_release_expr_list (expr_list
);
2887 attr
= build_tree_list (attr_name
, attr_args
);
2888 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2889 c_parser_consume_token (parser
);
2892 parser
->lex_untranslated_string
= false;
2893 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2897 attrs
= chainon (attrs
, attr
);
2899 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2900 c_parser_consume_token (parser
);
2903 parser
->lex_untranslated_string
= false;
2904 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2908 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2909 c_parser_consume_token (parser
);
2912 parser
->lex_untranslated_string
= false;
2913 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2917 parser
->lex_untranslated_string
= false;
2922 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2925 specifier-qualifier-list abstract-declarator[opt]
2928 static struct c_type_name
*
2929 c_parser_type_name (c_parser
*parser
)
2931 struct c_declspecs
*specs
= build_null_declspecs ();
2932 struct c_declarator
*declarator
;
2933 struct c_type_name
*ret
;
2935 c_parser_declspecs (parser
, specs
, false, true, true);
2936 if (!specs
->declspecs_seen_p
)
2938 c_parser_error (parser
, "expected specifier-qualifier-list");
2941 pending_xref_error ();
2942 finish_declspecs (specs
);
2943 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2944 C_DTR_ABSTRACT
, &dummy
);
2945 if (declarator
== NULL
)
2947 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2949 ret
->declarator
= declarator
;
2953 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2956 assignment-expression
2957 { initializer-list }
2958 { initializer-list , }
2961 designation[opt] initializer
2962 initializer-list , designation[opt] initializer
2969 designator-list designator
2976 [ constant-expression ]
2988 [ constant-expression ... constant-expression ]
2990 Any expression without commas is accepted in the syntax for the
2991 constant-expressions, with non-constant expressions rejected later.
2993 This function is only used for top-level initializers; for nested
2994 ones, see c_parser_initval. */
2996 static struct c_expr
2997 c_parser_initializer (c_parser
*parser
)
2999 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3000 return c_parser_braced_init (parser
, NULL_TREE
, false);
3004 ret
= c_parser_expr_no_commas (parser
, NULL
);
3005 if (TREE_CODE (ret
.value
) != STRING_CST
3006 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3007 ret
= default_function_array_conversion (ret
);
3012 /* Parse a braced initializer list. TYPE is the type specified for a
3013 compound literal, and NULL_TREE for other initializers and for
3014 nested braced lists. NESTED_P is true for nested braced lists,
3015 false for the list of a compound literal or the list that is the
3016 top-level initializer in a declaration. */
3018 static struct c_expr
3019 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3021 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3022 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3023 c_parser_consume_token (parser
);
3025 push_init_level (0);
3027 really_start_incremental_init (type
);
3028 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3030 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3034 /* Parse a non-empty initializer list, possibly with a trailing
3038 c_parser_initelt (parser
);
3041 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3042 c_parser_consume_token (parser
);
3045 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3049 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3052 ret
.value
= error_mark_node
;
3053 ret
.original_code
= ERROR_MARK
;
3054 ret
.original_type
= NULL
;
3055 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3059 c_parser_consume_token (parser
);
3060 return pop_init_level (0);
3063 /* Parse a nested initializer, including designators. */
3066 c_parser_initelt (c_parser
*parser
)
3068 /* Parse any designator or designator list. A single array
3069 designator may have the subsequent "=" omitted in GNU C, but a
3070 longer list or a structure member designator may not. */
3071 if (c_parser_next_token_is (parser
, CPP_NAME
)
3072 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3074 /* Old-style structure member designator. */
3075 set_init_label (c_parser_peek_token (parser
)->value
);
3076 /* Use the colon as the error location. */
3077 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3078 "obsolete use of designated initializer with %<:%>");
3079 c_parser_consume_token (parser
);
3080 c_parser_consume_token (parser
);
3084 /* des_seen is 0 if there have been no designators, 1 if there
3085 has been a single array designator and 2 otherwise. */
3087 /* Location of a designator. */
3088 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3089 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3090 || c_parser_next_token_is (parser
, CPP_DOT
))
3092 int des_prev
= des_seen
;
3094 des_loc
= c_parser_peek_token (parser
)->location
;
3097 if (c_parser_next_token_is (parser
, CPP_DOT
))
3100 c_parser_consume_token (parser
);
3101 if (c_parser_next_token_is (parser
, CPP_NAME
))
3103 set_init_label (c_parser_peek_token (parser
)->value
);
3104 c_parser_consume_token (parser
);
3109 init
.value
= error_mark_node
;
3110 init
.original_code
= ERROR_MARK
;
3111 init
.original_type
= NULL
;
3112 c_parser_error (parser
, "expected identifier");
3113 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3114 process_init_element (init
, false);
3121 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3122 /* ??? Following the old parser, [ objc-receiver
3123 objc-message-args ] is accepted as an initializer,
3124 being distinguished from a designator by what follows
3125 the first assignment expression inside the square
3126 brackets, but after a first array designator a
3127 subsequent square bracket is for Objective-C taken to
3128 start an expression, using the obsolete form of
3129 designated initializer without '=', rather than
3130 possibly being a second level of designation: in LALR
3131 terms, the '[' is shifted rather than reducing
3132 designator to designator-list. */
3133 if (des_prev
== 1 && c_dialect_objc ())
3135 des_seen
= des_prev
;
3138 if (des_prev
== 0 && c_dialect_objc ())
3140 /* This might be an array designator or an
3141 Objective-C message expression. If the former,
3142 continue parsing here; if the latter, parse the
3143 remainder of the initializer given the starting
3144 primary-expression. ??? It might make sense to
3145 distinguish when des_prev == 1 as well; see
3146 previous comment. */
3148 struct c_expr mexpr
;
3149 c_parser_consume_token (parser
);
3150 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3151 && ((c_parser_peek_token (parser
)->id_kind
3153 || (c_parser_peek_token (parser
)->id_kind
3154 == C_ID_CLASSNAME
)))
3156 /* Type name receiver. */
3157 tree id
= c_parser_peek_token (parser
)->value
;
3158 c_parser_consume_token (parser
);
3159 rec
= objc_get_class_reference (id
);
3160 goto parse_message_args
;
3162 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3163 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3164 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3165 goto array_desig_after_first
;
3166 /* Expression receiver. So far only one part
3167 without commas has been parsed; there might be
3168 more of the expression. */
3170 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3173 c_parser_consume_token (parser
);
3174 next
= c_parser_expr_no_commas (parser
, NULL
);
3175 next
= default_function_array_conversion (next
);
3176 rec
= build_compound_expr (rec
, next
.value
);
3179 /* Now parse the objc-message-args. */
3180 args
= c_parser_objc_message_args (parser
);
3181 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3184 = objc_build_message_expr (build_tree_list (rec
, args
));
3185 mexpr
.original_code
= ERROR_MARK
;
3186 mexpr
.original_type
= NULL
;
3187 /* Now parse and process the remainder of the
3188 initializer, starting with this message
3189 expression as a primary-expression. */
3190 c_parser_initval (parser
, &mexpr
);
3193 c_parser_consume_token (parser
);
3194 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3195 array_desig_after_first
:
3196 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3198 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3199 c_parser_consume_token (parser
);
3200 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3204 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3206 c_parser_consume_token (parser
);
3207 set_init_index (first
, second
);
3209 pedwarn (ellipsis_loc
, OPT_pedantic
,
3210 "ISO C forbids specifying range of elements to initialize");
3213 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3219 if (c_parser_next_token_is (parser
, CPP_EQ
))
3222 pedwarn (des_loc
, OPT_pedantic
,
3223 "ISO C90 forbids specifying subobject to initialize");
3224 c_parser_consume_token (parser
);
3229 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3230 "obsolete use of designated initializer without %<=%>");
3234 init
.value
= error_mark_node
;
3235 init
.original_code
= ERROR_MARK
;
3236 init
.original_type
= NULL
;
3237 c_parser_error (parser
, "expected %<=%>");
3238 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3239 process_init_element (init
, false);
3245 c_parser_initval (parser
, NULL
);
3248 /* Parse a nested initializer; as c_parser_initializer but parses
3249 initializers within braced lists, after any designators have been
3250 applied. If AFTER is not NULL then it is an Objective-C message
3251 expression which is the primary-expression starting the
3255 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3258 gcc_assert (!after
|| c_dialect_objc ());
3259 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3260 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3263 init
= c_parser_expr_no_commas (parser
, after
);
3264 if (init
.value
!= NULL_TREE
3265 && TREE_CODE (init
.value
) != STRING_CST
3266 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3267 init
= default_function_array_conversion (init
);
3269 process_init_element (init
, false);
3272 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3276 { block-item-list[opt] }
3277 { label-declarations block-item-list }
3281 block-item-list block-item
3293 { label-declarations block-item-list }
3296 __extension__ nested-declaration
3297 nested-function-definition
3301 label-declarations label-declaration
3304 __label__ identifier-list ;
3306 Allowing the mixing of declarations and code is new in C99. The
3307 GNU syntax also permits (not shown above) labels at the end of
3308 compound statements, which yield an error. We don't allow labels
3309 on declarations; this might seem like a natural extension, but
3310 there would be a conflict between attributes on the label and
3311 prefix attributes on the declaration. ??? The syntax follows the
3312 old parser in requiring something after label declarations.
3313 Although they are erroneous if the labels declared aren't defined,
3314 is it useful for the syntax to be this way?
3326 c_parser_compound_statement (c_parser
*parser
)
3329 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3331 /* Ensure a scope is entered and left anyway to avoid confusion
3332 if we have just prepared to enter a function body. */
3333 stmt
= c_begin_compound_stmt (true);
3334 c_end_compound_stmt (stmt
, true);
3335 return error_mark_node
;
3337 stmt
= c_begin_compound_stmt (true);
3338 c_parser_compound_statement_nostart (parser
);
3339 return c_end_compound_stmt (stmt
, true);
3342 /* Parse a compound statement except for the opening brace. This is
3343 used for parsing both compound statements and statement expressions
3344 (which follow different paths to handling the opening). */
3347 c_parser_compound_statement_nostart (c_parser
*parser
)
3349 bool last_stmt
= false;
3350 bool last_label
= false;
3351 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3352 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3354 c_parser_consume_token (parser
);
3357 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3359 location_t err_loc
= c_parser_peek_token (parser
)->location
;
3360 /* Read zero or more forward-declarations for labels that nested
3361 functions can jump to. */
3362 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3364 c_parser_consume_token (parser
);
3365 /* Any identifiers, including those declared as type names,
3370 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3372 c_parser_error (parser
, "expected identifier");
3376 = declare_label (c_parser_peek_token (parser
)->value
);
3377 C_DECLARED_LABEL_FLAG (label
) = 1;
3378 add_stmt (build_stmt (DECL_EXPR
, label
));
3379 c_parser_consume_token (parser
);
3380 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3381 c_parser_consume_token (parser
);
3385 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3387 pedwarn (err_loc
, OPT_pedantic
, "ISO C forbids label declarations");
3389 /* We must now have at least one statement, label or declaration. */
3390 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3392 c_parser_error (parser
, "expected declaration or statement");
3393 c_parser_consume_token (parser
);
3396 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3398 location_t loc
= c_parser_peek_token (parser
)->location
;
3399 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3400 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3401 || (c_parser_next_token_is (parser
, CPP_NAME
)
3402 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3404 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3405 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
3407 label_loc
= c_parser_peek_token (parser
)->location
;
3410 c_parser_label (parser
);
3412 else if (!last_label
3413 && c_parser_next_token_starts_declspecs (parser
))
3416 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3419 (pedantic
&& !flag_isoc99
)
3421 : OPT_Wdeclaration_after_statement
,
3422 "ISO C90 forbids mixed declarations and code");
3425 else if (!last_label
3426 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3428 /* __extension__ can start a declaration, but is also an
3429 unary operator that can start an expression. Consume all
3430 but the last of a possible series of __extension__ to
3432 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3433 && (c_parser_peek_2nd_token (parser
)->keyword
3435 c_parser_consume_token (parser
);
3436 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3439 ext
= disable_extension_diagnostics ();
3440 c_parser_consume_token (parser
);
3442 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3443 /* Following the old parser, __extension__ does not
3444 disable this diagnostic. */
3445 restore_extension_diagnostics (ext
);
3447 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
3449 : OPT_Wdeclaration_after_statement
,
3450 "ISO C90 forbids mixed declarations and code");
3456 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3458 /* External pragmas, and some omp pragmas, are not associated
3459 with regular c code, and so are not to be considered statements
3460 syntactically. This ensures that the user doesn't put them
3461 places that would turn into syntax errors if the directive
3463 if (c_parser_pragma (parser
, pragma_compound
))
3464 last_label
= false, last_stmt
= true;
3466 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3468 c_parser_error (parser
, "expected declaration or statement");
3471 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3473 if (parser
->in_if_block
)
3475 error_at (loc
, """expected %<}%> before %<else%>");
3480 error_at (loc
, "%<else%> without a previous %<if%>");
3481 c_parser_consume_token (parser
);
3490 c_parser_statement_after_labels (parser
);
3493 parser
->error
= false;
3496 error_at (label_loc
, "label at end of compound statement");
3497 c_parser_consume_token (parser
);
3500 /* Parse a label (C90 6.6.1, C99 6.8.1).
3503 identifier : attributes[opt]
3504 case constant-expression :
3510 case constant-expression ... constant-expression :
3512 The use of attributes on labels is a GNU extension. The syntax in
3513 GNU C accepts any expressions without commas, non-constant
3514 expressions being rejected later. */
3517 c_parser_label (c_parser
*parser
)
3519 location_t loc1
= c_parser_peek_token (parser
)->location
;
3520 tree label
= NULL_TREE
;
3521 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3524 c_parser_consume_token (parser
);
3525 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3526 if (c_parser_next_token_is (parser
, CPP_COLON
))
3528 c_parser_consume_token (parser
);
3529 label
= do_case (exp1
, NULL_TREE
);
3531 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3533 c_parser_consume_token (parser
);
3534 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3535 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3536 label
= do_case (exp1
, exp2
);
3539 c_parser_error (parser
, "expected %<:%> or %<...%>");
3541 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3543 c_parser_consume_token (parser
);
3544 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3545 label
= do_case (NULL_TREE
, NULL_TREE
);
3549 tree name
= c_parser_peek_token (parser
)->value
;
3552 location_t loc2
= c_parser_peek_token (parser
)->location
;
3553 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3554 c_parser_consume_token (parser
);
3555 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3556 c_parser_consume_token (parser
);
3557 attrs
= c_parser_attributes (parser
);
3558 tlab
= define_label (loc2
, name
);
3561 decl_attributes (&tlab
, attrs
, 0);
3562 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3567 SET_EXPR_LOCATION (label
, loc1
);
3568 if (c_parser_next_token_starts_declspecs (parser
)
3569 && !(c_parser_next_token_is (parser
, CPP_NAME
)
3570 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3572 error_at (c_parser_peek_token (parser
)->location
,
3573 "a label can only be part of a statement and "
3574 "a declaration is not a statement");
3575 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
3576 /*nested*/ true, /*empty_ok*/ false,
3577 /*start_attr_ok*/ true);
3582 /* Parse a statement (C90 6.6, C99 6.8).
3587 expression-statement
3595 expression-statement:
3598 selection-statement:
3602 iteration-statement:
3611 return expression[opt] ;
3624 objc-throw-statement
3625 objc-try-catch-statement
3626 objc-synchronized-statement
3628 objc-throw-statement:
3642 parallel-for-construct
3643 parallel-sections-construct
3650 parallel-directive structured-block
3653 for-directive iteration-statement
3656 sections-directive section-scope
3659 single-directive structured-block
3661 parallel-for-construct:
3662 parallel-for-directive iteration-statement
3664 parallel-sections-construct:
3665 parallel-sections-directive section-scope
3668 master-directive structured-block
3671 critical-directive structured-block
3674 atomic-directive expression-statement
3677 ordered-directive structured-block */
3680 c_parser_statement (c_parser
*parser
)
3682 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3683 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3684 || (c_parser_next_token_is (parser
, CPP_NAME
)
3685 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3686 c_parser_label (parser
);
3687 c_parser_statement_after_labels (parser
);
3690 /* Parse a statement, other than a labeled statement. */
3693 c_parser_statement_after_labels (c_parser
*parser
)
3695 location_t loc
= c_parser_peek_token (parser
)->location
;
3696 tree stmt
= NULL_TREE
;
3697 bool in_if_block
= parser
->in_if_block
;
3698 parser
->in_if_block
= false;
3699 switch (c_parser_peek_token (parser
)->type
)
3701 case CPP_OPEN_BRACE
:
3702 add_stmt (c_parser_compound_statement (parser
));
3705 switch (c_parser_peek_token (parser
)->keyword
)
3708 c_parser_if_statement (parser
);
3711 c_parser_switch_statement (parser
);
3714 c_parser_while_statement (parser
);
3717 c_parser_do_statement (parser
);
3720 c_parser_for_statement (parser
);
3723 c_parser_consume_token (parser
);
3724 if (c_parser_next_token_is (parser
, CPP_NAME
))
3726 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3727 c_parser_consume_token (parser
);
3729 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3731 c_parser_consume_token (parser
);
3732 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3735 c_parser_error (parser
, "expected identifier or %<*%>");
3736 goto expect_semicolon
;
3738 c_parser_consume_token (parser
);
3739 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3740 goto expect_semicolon
;
3742 c_parser_consume_token (parser
);
3743 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3744 goto expect_semicolon
;
3746 c_parser_consume_token (parser
);
3747 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3749 stmt
= c_finish_return (NULL_TREE
, NULL_TREE
);
3750 c_parser_consume_token (parser
);
3754 struct c_expr expr
= c_parser_expression_conv (parser
);
3755 stmt
= c_finish_return (expr
.value
, expr
.original_type
);
3756 goto expect_semicolon
;
3760 stmt
= c_parser_asm_statement (parser
);
3763 gcc_assert (c_dialect_objc ());
3764 c_parser_consume_token (parser
);
3765 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3767 stmt
= objc_build_throw_stmt (NULL_TREE
);
3768 c_parser_consume_token (parser
);
3772 tree expr
= c_parser_expression (parser
).value
;
3773 expr
= c_fully_fold (expr
, false, NULL
);
3774 stmt
= objc_build_throw_stmt (expr
);
3775 goto expect_semicolon
;
3779 gcc_assert (c_dialect_objc ());
3780 c_parser_objc_try_catch_statement (parser
);
3782 case RID_AT_SYNCHRONIZED
:
3783 gcc_assert (c_dialect_objc ());
3784 c_parser_objc_synchronized_statement (parser
);
3791 c_parser_consume_token (parser
);
3793 case CPP_CLOSE_PAREN
:
3794 case CPP_CLOSE_SQUARE
:
3795 /* Avoid infinite loop in error recovery:
3796 c_parser_skip_until_found stops at a closing nesting
3797 delimiter without consuming it, but here we need to consume
3798 it to proceed further. */
3799 c_parser_error (parser
, "expected statement");
3800 c_parser_consume_token (parser
);
3803 c_parser_pragma (parser
, pragma_stmt
);
3807 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3809 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3812 /* Two cases cannot and do not have line numbers associated: If stmt
3813 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3814 cannot hold line numbers. But that's OK because the statement
3815 will either be changed to a MODIFY_EXPR during gimplification of
3816 the statement expr, or discarded. If stmt was compound, but
3817 without new variables, we will have skipped the creation of a
3818 BIND and will have a bare STATEMENT_LIST. But that's OK because
3819 (recursively) all of the component statements should already have
3820 line numbers assigned. ??? Can we discard no-op statements
3822 protected_set_expr_location (stmt
, loc
);
3824 parser
->in_if_block
= in_if_block
;
3827 /* Parse the condition from an if, do, while or for statements. */
3830 c_parser_condition (c_parser
*parser
)
3834 loc
= c_parser_peek_token (parser
)->location
;
3835 cond
= c_parser_expression_conv (parser
).value
;
3836 cond
= c_objc_common_truthvalue_conversion (loc
, cond
);
3837 cond
= c_fully_fold (cond
, false, NULL
);
3838 protected_set_expr_location (cond
, loc
);
3839 if (warn_sequence_point
)
3840 verify_sequence_points (cond
);
3844 /* Parse a parenthesized condition from an if, do or while statement.
3850 c_parser_paren_condition (c_parser
*parser
)
3853 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3854 return error_mark_node
;
3855 cond
= c_parser_condition (parser
);
3856 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3860 /* Parse a statement which is a block in C99. */
3863 c_parser_c99_block_statement (c_parser
*parser
)
3865 tree block
= c_begin_compound_stmt (flag_isoc99
);
3866 c_parser_statement (parser
);
3867 return c_end_compound_stmt (block
, flag_isoc99
);
3870 /* Parse the body of an if statement. This is just parsing a
3871 statement but (a) it is a block in C99, (b) we track whether the
3872 body is an if statement for the sake of -Wparentheses warnings, (c)
3873 we handle an empty body specially for the sake of -Wempty-body
3874 warnings, and (d) we call parser_compound_statement directly
3875 because c_parser_statement_after_labels resets
3876 parser->in_if_block. */
3879 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3881 tree block
= c_begin_compound_stmt (flag_isoc99
);
3882 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3883 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3884 || (c_parser_next_token_is (parser
, CPP_NAME
)
3885 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3886 c_parser_label (parser
);
3887 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3888 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3890 location_t loc
= c_parser_peek_token (parser
)->location
;
3891 add_stmt (build_empty_stmt ());
3892 c_parser_consume_token (parser
);
3893 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3894 warning_at (loc
, OPT_Wempty_body
,
3895 "suggest braces around empty body in an %<if%> statement");
3897 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3898 add_stmt (c_parser_compound_statement (parser
));
3900 c_parser_statement_after_labels (parser
);
3901 return c_end_compound_stmt (block
, flag_isoc99
);
3904 /* Parse the else body of an if statement. This is just parsing a
3905 statement but (a) it is a block in C99, (b) we handle an empty body
3906 specially for the sake of -Wempty-body warnings. */
3909 c_parser_else_body (c_parser
*parser
)
3911 tree block
= c_begin_compound_stmt (flag_isoc99
);
3912 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3913 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3914 || (c_parser_next_token_is (parser
, CPP_NAME
)
3915 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3916 c_parser_label (parser
);
3917 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3919 warning_at (c_parser_peek_token (parser
)->location
,
3921 "suggest braces around empty body in an %<else%> statement");
3922 add_stmt (build_empty_stmt ());
3923 c_parser_consume_token (parser
);
3926 c_parser_statement_after_labels (parser
);
3927 return c_end_compound_stmt (block
, flag_isoc99
);
3930 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3933 if ( expression ) statement
3934 if ( expression ) statement else statement
3938 c_parser_if_statement (c_parser
*parser
)
3943 bool first_if
= false;
3944 tree first_body
, second_body
;
3947 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3948 c_parser_consume_token (parser
);
3949 block
= c_begin_compound_stmt (flag_isoc99
);
3950 loc
= c_parser_peek_token (parser
)->location
;
3951 cond
= c_parser_paren_condition (parser
);
3952 in_if_block
= parser
->in_if_block
;
3953 parser
->in_if_block
= true;
3954 first_body
= c_parser_if_body (parser
, &first_if
);
3955 parser
->in_if_block
= in_if_block
;
3956 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3958 c_parser_consume_token (parser
);
3959 second_body
= c_parser_else_body (parser
);
3962 second_body
= NULL_TREE
;
3963 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3964 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3967 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3970 switch (expression) statement
3974 c_parser_switch_statement (c_parser
*parser
)
3976 tree block
, expr
, body
, save_break
;
3977 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3978 c_parser_consume_token (parser
);
3979 block
= c_begin_compound_stmt (flag_isoc99
);
3980 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3982 expr
= c_parser_expression (parser
).value
;
3983 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3986 expr
= error_mark_node
;
3987 c_start_case (expr
);
3988 save_break
= c_break_label
;
3989 c_break_label
= NULL_TREE
;
3990 body
= c_parser_c99_block_statement (parser
);
3991 c_finish_case (body
);
3993 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3994 c_break_label
= save_break
;
3995 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3998 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
4001 while (expression) statement
4005 c_parser_while_statement (c_parser
*parser
)
4007 tree block
, cond
, body
, save_break
, save_cont
;
4009 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
4010 c_parser_consume_token (parser
);
4011 block
= c_begin_compound_stmt (flag_isoc99
);
4012 loc
= c_parser_peek_token (parser
)->location
;
4013 cond
= c_parser_paren_condition (parser
);
4014 save_break
= c_break_label
;
4015 c_break_label
= NULL_TREE
;
4016 save_cont
= c_cont_label
;
4017 c_cont_label
= NULL_TREE
;
4018 body
= c_parser_c99_block_statement (parser
);
4019 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
4020 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4021 c_break_label
= save_break
;
4022 c_cont_label
= save_cont
;
4025 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4028 do statement while ( expression ) ;
4032 c_parser_do_statement (c_parser
*parser
)
4034 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4036 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4037 c_parser_consume_token (parser
);
4038 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4039 warning_at (c_parser_peek_token (parser
)->location
,
4041 "suggest braces around empty body in %<do%> statement");
4042 block
= c_begin_compound_stmt (flag_isoc99
);
4043 loc
= c_parser_peek_token (parser
)->location
;
4044 save_break
= c_break_label
;
4045 c_break_label
= NULL_TREE
;
4046 save_cont
= c_cont_label
;
4047 c_cont_label
= NULL_TREE
;
4048 body
= c_parser_c99_block_statement (parser
);
4049 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4050 new_break
= c_break_label
;
4051 c_break_label
= save_break
;
4052 new_cont
= c_cont_label
;
4053 c_cont_label
= save_cont
;
4054 cond
= c_parser_paren_condition (parser
);
4055 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4056 c_parser_skip_to_end_of_block_or_statement (parser
);
4057 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4058 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4061 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4064 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4065 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4067 The form with a declaration is new in C99.
4069 ??? In accordance with the old parser, the declaration may be a
4070 nested function, which is then rejected in check_for_loop_decls,
4071 but does it make any sense for this to be included in the grammar?
4072 Note in particular that the nested function does not include a
4073 trailing ';', whereas the "declaration" production includes one.
4074 Also, can we reject bad declarations earlier and cheaper than
4075 check_for_loop_decls? */
4078 c_parser_for_statement (c_parser
*parser
)
4080 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4082 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4083 loc
= c_parser_peek_token (parser
)->location
;
4084 c_parser_consume_token (parser
);
4085 block
= c_begin_compound_stmt (flag_isoc99
);
4086 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4088 /* Parse the initialization declaration or expression. */
4089 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4091 c_parser_consume_token (parser
);
4092 c_finish_expr_stmt (NULL_TREE
);
4094 else if (c_parser_next_token_starts_declspecs (parser
))
4096 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4097 check_for_loop_decls ();
4099 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4101 /* __extension__ can start a declaration, but is also an
4102 unary operator that can start an expression. Consume all
4103 but the last of a possible series of __extension__ to
4105 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4106 && (c_parser_peek_2nd_token (parser
)->keyword
4108 c_parser_consume_token (parser
);
4109 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4112 ext
= disable_extension_diagnostics ();
4113 c_parser_consume_token (parser
);
4114 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4115 restore_extension_diagnostics (ext
);
4116 check_for_loop_decls ();
4124 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4125 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4127 /* Parse the loop condition. */
4128 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4130 c_parser_consume_token (parser
);
4135 cond
= c_parser_condition (parser
);
4136 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4138 /* Parse the increment expression. */
4139 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4140 incr
= c_process_expr_stmt (NULL_TREE
);
4142 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4143 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4147 cond
= error_mark_node
;
4148 incr
= error_mark_node
;
4150 save_break
= c_break_label
;
4151 c_break_label
= NULL_TREE
;
4152 save_cont
= c_cont_label
;
4153 c_cont_label
= NULL_TREE
;
4154 body
= c_parser_c99_block_statement (parser
);
4155 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4156 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4157 c_break_label
= save_break
;
4158 c_cont_label
= save_cont
;
4161 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4162 statement with inputs, outputs, clobbers, and volatile tag
4166 asm type-qualifier[opt] ( asm-argument ) ;
4170 asm-string-literal : asm-operands[opt]
4171 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4172 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4174 Qualifiers other than volatile are accepted in the syntax but
4178 c_parser_asm_statement (c_parser
*parser
)
4180 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4182 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4183 c_parser_consume_token (parser
);
4184 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4186 quals
= c_parser_peek_token (parser
)->value
;
4187 c_parser_consume_token (parser
);
4189 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4190 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4192 warning_at (c_parser_peek_token (parser
)->location
,
4194 "%E qualifier ignored on asm",
4195 c_parser_peek_token (parser
)->value
);
4197 c_parser_consume_token (parser
);
4201 /* ??? Follow the C++ parser rather than using the
4202 lex_untranslated_string kludge. */
4203 parser
->lex_untranslated_string
= true;
4204 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4206 parser
->lex_untranslated_string
= false;
4209 str
= c_parser_asm_string_literal (parser
);
4210 if (str
== NULL_TREE
)
4212 parser
->lex_untranslated_string
= false;
4213 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4216 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4219 outputs
= NULL_TREE
;
4221 clobbers
= NULL_TREE
;
4224 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4226 parser
->lex_untranslated_string
= false;
4227 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4231 /* Parse outputs. */
4232 if (c_parser_next_token_is (parser
, CPP_COLON
)
4233 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4234 outputs
= NULL_TREE
;
4236 outputs
= c_parser_asm_operands (parser
, false);
4237 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4240 clobbers
= NULL_TREE
;
4243 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4245 parser
->lex_untranslated_string
= false;
4246 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4250 if (c_parser_next_token_is (parser
, CPP_COLON
)
4251 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4254 inputs
= c_parser_asm_operands (parser
, true);
4255 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4257 clobbers
= NULL_TREE
;
4260 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4262 parser
->lex_untranslated_string
= false;
4263 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4266 /* Parse clobbers. */
4267 clobbers
= c_parser_asm_clobbers (parser
);
4269 parser
->lex_untranslated_string
= false;
4270 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4272 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4275 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4276 c_parser_skip_to_end_of_block_or_statement (parser
);
4277 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4282 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4283 not outputs), apply the default conversion of functions and arrays
4288 asm-operands , asm-operand
4291 asm-string-literal ( expression )
4292 [ identifier ] asm-string-literal ( expression )
4296 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4298 tree list
= NULL_TREE
;
4303 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4305 c_parser_consume_token (parser
);
4306 if (c_parser_next_token_is (parser
, CPP_NAME
))
4308 tree id
= c_parser_peek_token (parser
)->value
;
4309 c_parser_consume_token (parser
);
4310 name
= build_string (IDENTIFIER_LENGTH (id
),
4311 IDENTIFIER_POINTER (id
));
4315 c_parser_error (parser
, "expected identifier");
4316 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4319 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4324 str
= c_parser_asm_string_literal (parser
);
4325 if (str
== NULL_TREE
)
4327 parser
->lex_untranslated_string
= false;
4328 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4330 parser
->lex_untranslated_string
= true;
4333 expr
= c_parser_expression (parser
);
4335 expr
= default_function_array_conversion (expr
);
4336 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
4337 parser
->lex_untranslated_string
= true;
4338 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4340 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4343 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4345 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4346 c_parser_consume_token (parser
);
4353 /* Parse asm clobbers, a GNU extension.
4357 asm-clobbers , asm-string-literal
4361 c_parser_asm_clobbers (c_parser
*parser
)
4363 tree list
= NULL_TREE
;
4366 tree str
= c_parser_asm_string_literal (parser
);
4368 list
= tree_cons (NULL_TREE
, str
, list
);
4371 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4372 c_parser_consume_token (parser
);
4379 /* Parse an expression other than a compound expression; that is, an
4380 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4381 NULL then it is an Objective-C message expression which is the
4382 primary-expression starting the expression as an initializer.
4384 assignment-expression:
4385 conditional-expression
4386 unary-expression assignment-operator assignment-expression
4388 assignment-operator: one of
4389 = *= /= %= += -= <<= >>= &= ^= |=
4391 In GNU C we accept any conditional expression on the LHS and
4392 diagnose the invalid lvalue rather than producing a syntax
4395 static struct c_expr
4396 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4398 struct c_expr lhs
, rhs
, ret
;
4399 enum tree_code code
;
4400 location_t op_location
;
4401 gcc_assert (!after
|| c_dialect_objc ());
4402 lhs
= c_parser_conditional_expression (parser
, after
);
4403 op_location
= c_parser_peek_token (parser
)->location
;
4404 switch (c_parser_peek_token (parser
)->type
)
4413 code
= TRUNC_DIV_EXPR
;
4416 code
= TRUNC_MOD_EXPR
;
4431 code
= BIT_AND_EXPR
;
4434 code
= BIT_XOR_EXPR
;
4437 code
= BIT_IOR_EXPR
;
4442 c_parser_consume_token (parser
);
4443 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4444 rhs
= default_function_array_conversion (rhs
);
4445 ret
.value
= build_modify_expr (op_location
, lhs
.value
, code
, rhs
.value
,
4447 if (code
== NOP_EXPR
)
4448 ret
.original_code
= MODIFY_EXPR
;
4451 TREE_NO_WARNING (ret
.value
) = 1;
4452 ret
.original_code
= ERROR_MARK
;
4454 ret
.original_type
= NULL
;
4458 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4459 is not NULL then it is an Objective-C message expression which is
4460 the primary-expression starting the expression as an initializer.
4462 conditional-expression:
4463 logical-OR-expression
4464 logical-OR-expression ? expression : conditional-expression
4468 conditional-expression:
4469 logical-OR-expression ? : conditional-expression
4472 static struct c_expr
4473 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4475 struct c_expr cond
, exp1
, exp2
, ret
;
4476 location_t cond_loc
;
4478 gcc_assert (!after
|| c_dialect_objc ());
4480 cond_loc
= c_parser_peek_token (parser
)->location
;
4481 cond
= c_parser_binary_expression (parser
, after
);
4482 protected_set_expr_location (cond
.value
, cond_loc
);
4484 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4486 cond
= default_function_array_conversion (cond
);
4487 c_parser_consume_token (parser
);
4488 if (c_parser_next_token_is (parser
, CPP_COLON
))
4490 tree eptype
= NULL_TREE
;
4491 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
4492 "ISO C forbids omitting the middle term of a ?: expression");
4493 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
4495 eptype
= TREE_TYPE (cond
.value
);
4496 cond
.value
= TREE_OPERAND (cond
.value
, 0);
4498 /* Make sure first operand is calculated only once. */
4499 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
4501 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
4502 exp1
.original_type
= NULL
;
4503 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
4504 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4509 = c_objc_common_truthvalue_conversion
4510 (cond_loc
, default_conversion (cond
.value
));
4511 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4512 exp1
= c_parser_expression_conv (parser
);
4513 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4514 - (cond
.value
== truthvalue_false_node
));
4516 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4518 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4519 ret
.value
= error_mark_node
;
4520 ret
.original_code
= ERROR_MARK
;
4521 ret
.original_type
= NULL
;
4524 exp2
= c_parser_conditional_expression (parser
, NULL
);
4525 exp2
= default_function_array_conversion (exp2
);
4526 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4527 ret
.value
= build_conditional_expr (cond
.value
,
4528 cond
.original_code
== C_MAYBE_CONST_EXPR
,
4529 exp1
.value
, exp2
.value
);
4530 ret
.original_code
= ERROR_MARK
;
4531 if (exp1
.value
== error_mark_node
|| exp2
.value
== error_mark_node
)
4532 ret
.original_type
= NULL
;
4537 /* If both sides are enum type, the default conversion will have
4538 made the type of the result be an integer type. We want to
4539 remember the enum types we started with. */
4540 t1
= exp1
.original_type
? exp1
.original_type
: TREE_TYPE (exp1
.value
);
4541 t2
= exp2
.original_type
? exp2
.original_type
: TREE_TYPE (exp2
.value
);
4542 ret
.original_type
= ((t1
!= error_mark_node
4543 && t2
!= error_mark_node
4544 && (TYPE_MAIN_VARIANT (t1
)
4545 == TYPE_MAIN_VARIANT (t2
)))
4552 /* Parse a binary expression; that is, a logical-OR-expression (C90
4553 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4554 an Objective-C message expression which is the primary-expression
4555 starting the expression as an initializer.
4557 multiplicative-expression:
4559 multiplicative-expression * cast-expression
4560 multiplicative-expression / cast-expression
4561 multiplicative-expression % cast-expression
4563 additive-expression:
4564 multiplicative-expression
4565 additive-expression + multiplicative-expression
4566 additive-expression - multiplicative-expression
4570 shift-expression << additive-expression
4571 shift-expression >> additive-expression
4573 relational-expression:
4575 relational-expression < shift-expression
4576 relational-expression > shift-expression
4577 relational-expression <= shift-expression
4578 relational-expression >= shift-expression
4580 equality-expression:
4581 relational-expression
4582 equality-expression == relational-expression
4583 equality-expression != relational-expression
4587 AND-expression & equality-expression
4589 exclusive-OR-expression:
4591 exclusive-OR-expression ^ AND-expression
4593 inclusive-OR-expression:
4594 exclusive-OR-expression
4595 inclusive-OR-expression | exclusive-OR-expression
4597 logical-AND-expression:
4598 inclusive-OR-expression
4599 logical-AND-expression && inclusive-OR-expression
4601 logical-OR-expression:
4602 logical-AND-expression
4603 logical-OR-expression || logical-AND-expression
4606 static struct c_expr
4607 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4609 /* A binary expression is parsed using operator-precedence parsing,
4610 with the operands being cast expressions. All the binary
4611 operators are left-associative. Thus a binary expression is of
4614 E0 op1 E1 op2 E2 ...
4616 which we represent on a stack. On the stack, the precedence
4617 levels are strictly increasing. When a new operator is
4618 encountered of higher precedence than that at the top of the
4619 stack, it is pushed; its LHS is the top expression, and its RHS
4620 is everything parsed until it is popped. When a new operator is
4621 encountered with precedence less than or equal to that at the top
4622 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4623 by the result of the operation until the operator at the top of
4624 the stack has lower precedence than the new operator or there is
4625 only one element on the stack; then the top expression is the LHS
4626 of the new operator. In the case of logical AND and OR
4627 expressions, we also need to adjust skip_evaluation as
4628 appropriate when the operators are pushed and popped. */
4630 /* The precedence levels, where 0 is a dummy lowest level used for
4631 the bottom of the stack. */
4647 /* The expression at this stack level. */
4649 /* The precedence of the operator on its left, PREC_NONE at the
4650 bottom of the stack. */
4652 /* The operation on its left. */
4656 /* Location of the binary operator. */
4657 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
4660 switch (stack[sp].op) \
4662 case TRUTH_ANDIF_EXPR: \
4663 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4665 case TRUTH_ORIF_EXPR: \
4666 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4671 stack[sp - 1].expr \
4672 = default_function_array_conversion (stack[sp - 1].expr); \
4674 = default_function_array_conversion (stack[sp].expr); \
4675 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4677 stack[sp - 1].expr, \
4681 gcc_assert (!after
|| c_dialect_objc ());
4682 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4683 stack
[0].prec
= PREC_NONE
;
4688 enum tree_code ocode
;
4691 switch (c_parser_peek_token (parser
)->type
)
4699 ocode
= TRUNC_DIV_EXPR
;
4703 ocode
= TRUNC_MOD_EXPR
;
4715 ocode
= LSHIFT_EXPR
;
4719 ocode
= RSHIFT_EXPR
;
4733 case CPP_GREATER_EQ
:
4746 oprec
= PREC_BITAND
;
4747 ocode
= BIT_AND_EXPR
;
4750 oprec
= PREC_BITXOR
;
4751 ocode
= BIT_XOR_EXPR
;
4755 ocode
= BIT_IOR_EXPR
;
4758 oprec
= PREC_LOGAND
;
4759 ocode
= TRUTH_ANDIF_EXPR
;
4763 ocode
= TRUTH_ORIF_EXPR
;
4766 /* Not a binary operator, so end of the binary
4770 binary_loc
= c_parser_peek_token (parser
)->location
;
4771 c_parser_consume_token (parser
);
4772 while (oprec
<= stack
[sp
].prec
)
4776 case TRUTH_ANDIF_EXPR
:
4778 = default_function_array_conversion (stack
[sp
].expr
);
4779 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4780 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4781 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4783 case TRUTH_ORIF_EXPR
:
4785 = default_function_array_conversion (stack
[sp
].expr
);
4786 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4787 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4788 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4794 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4795 stack
[sp
].prec
= oprec
;
4796 stack
[sp
].op
= ocode
;
4801 return stack
[0].expr
;
4805 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4806 NULL then it is an Objective-C message expression which is the
4807 primary-expression starting the expression as an initializer.
4811 ( type-name ) unary-expression
4814 static struct c_expr
4815 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4817 gcc_assert (!after
|| c_dialect_objc ());
4819 return c_parser_postfix_expression_after_primary (parser
, *after
);
4820 /* If the expression begins with a parenthesized type name, it may
4821 be either a cast or a compound literal; we need to see whether
4822 the next character is '{' to tell the difference. If not, it is
4823 an unary expression. */
4824 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4825 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4827 struct c_type_name
*type_name
;
4830 c_parser_consume_token (parser
);
4831 type_name
= c_parser_type_name (parser
);
4832 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4833 if (type_name
== NULL
)
4835 ret
.value
= error_mark_node
;
4836 ret
.original_code
= ERROR_MARK
;
4837 ret
.original_type
= NULL
;
4841 /* Save casted types in the function's used types hash table. */
4842 used_types_insert (type_name
->specs
->type
);
4844 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4845 return c_parser_postfix_expression_after_paren_type (parser
,
4847 expr
= c_parser_cast_expression (parser
, NULL
);
4848 expr
= default_function_array_conversion (expr
);
4849 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4850 ret
.original_code
= ERROR_MARK
;
4851 ret
.original_type
= NULL
;
4855 return c_parser_unary_expression (parser
);
4858 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4864 unary-operator cast-expression
4865 sizeof unary-expression
4866 sizeof ( type-name )
4868 unary-operator: one of
4874 __alignof__ unary-expression
4875 __alignof__ ( type-name )
4878 unary-operator: one of
4879 __extension__ __real__ __imag__
4881 In addition, the GNU syntax treats ++ and -- as unary operators, so
4882 they may be applied to cast expressions with errors for non-lvalues
4885 static struct c_expr
4886 c_parser_unary_expression (c_parser
*parser
)
4889 struct c_expr ret
, op
;
4890 location_t loc
= c_parser_peek_token (parser
)->location
;
4891 ret
.original_code
= ERROR_MARK
;
4892 ret
.original_type
= NULL
;
4893 switch (c_parser_peek_token (parser
)->type
)
4896 c_parser_consume_token (parser
);
4897 op
= c_parser_cast_expression (parser
, NULL
);
4898 op
= default_function_array_conversion (op
);
4899 return parser_build_unary_op (PREINCREMENT_EXPR
, op
, loc
);
4900 case CPP_MINUS_MINUS
:
4901 c_parser_consume_token (parser
);
4902 op
= c_parser_cast_expression (parser
, NULL
);
4903 op
= default_function_array_conversion (op
);
4904 return parser_build_unary_op (PREDECREMENT_EXPR
, op
, loc
);
4906 c_parser_consume_token (parser
);
4907 return parser_build_unary_op (ADDR_EXPR
,
4908 c_parser_cast_expression (parser
, NULL
),
4911 c_parser_consume_token (parser
);
4912 op
= c_parser_cast_expression (parser
, NULL
);
4913 op
= default_function_array_conversion (op
);
4914 ret
.value
= build_indirect_ref (loc
, op
.value
, "unary *");
4917 if (!c_dialect_objc () && !in_system_header
)
4918 warning_at (c_parser_peek_token (parser
)->location
,
4920 "traditional C rejects the unary plus operator");
4921 c_parser_consume_token (parser
);
4922 op
= c_parser_cast_expression (parser
, NULL
);
4923 op
= default_function_array_conversion (op
);
4924 return parser_build_unary_op (CONVERT_EXPR
, op
, loc
);
4926 c_parser_consume_token (parser
);
4927 op
= c_parser_cast_expression (parser
, NULL
);
4928 op
= default_function_array_conversion (op
);
4929 return parser_build_unary_op (NEGATE_EXPR
, op
, loc
);
4931 c_parser_consume_token (parser
);
4932 op
= c_parser_cast_expression (parser
, NULL
);
4933 op
= default_function_array_conversion (op
);
4934 return parser_build_unary_op (BIT_NOT_EXPR
, op
, loc
);
4936 c_parser_consume_token (parser
);
4937 op
= c_parser_cast_expression (parser
, NULL
);
4938 op
= default_function_array_conversion (op
);
4939 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
, loc
);
4941 /* Refer to the address of a label as a pointer. */
4942 c_parser_consume_token (parser
);
4943 if (c_parser_next_token_is (parser
, CPP_NAME
))
4945 ret
.value
= finish_label_address_expr
4946 (c_parser_peek_token (parser
)->value
, loc
);
4947 c_parser_consume_token (parser
);
4951 c_parser_error (parser
, "expected identifier");
4952 ret
.value
= error_mark_node
;
4956 switch (c_parser_peek_token (parser
)->keyword
)
4959 return c_parser_sizeof_expression (parser
);
4961 return c_parser_alignof_expression (parser
);
4963 c_parser_consume_token (parser
);
4964 ext
= disable_extension_diagnostics ();
4965 ret
= c_parser_cast_expression (parser
, NULL
);
4966 restore_extension_diagnostics (ext
);
4969 c_parser_consume_token (parser
);
4970 op
= c_parser_cast_expression (parser
, NULL
);
4971 op
= default_function_array_conversion (op
);
4972 return parser_build_unary_op (REALPART_EXPR
, op
, loc
);
4974 c_parser_consume_token (parser
);
4975 op
= c_parser_cast_expression (parser
, NULL
);
4976 op
= default_function_array_conversion (op
);
4977 return parser_build_unary_op (IMAGPART_EXPR
, op
, loc
);
4979 return c_parser_postfix_expression (parser
);
4982 return c_parser_postfix_expression (parser
);
4986 /* Parse a sizeof expression. */
4988 static struct c_expr
4989 c_parser_sizeof_expression (c_parser
*parser
)
4992 location_t expr_loc
;
4993 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4994 c_parser_consume_token (parser
);
4997 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4998 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5000 /* Either sizeof ( type-name ) or sizeof unary-expression
5001 starting with a compound literal. */
5002 struct c_type_name
*type_name
;
5003 c_parser_consume_token (parser
);
5004 expr_loc
= c_parser_peek_token (parser
)->location
;
5005 type_name
= c_parser_type_name (parser
);
5006 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5007 if (type_name
== NULL
)
5012 ret
.value
= error_mark_node
;
5013 ret
.original_code
= ERROR_MARK
;
5014 ret
.original_type
= NULL
;
5017 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5019 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5023 /* sizeof ( type-name ). */
5026 return c_expr_sizeof_type (type_name
);
5030 expr_loc
= c_parser_peek_token (parser
)->location
;
5031 expr
= c_parser_unary_expression (parser
);
5035 if (TREE_CODE (expr
.value
) == COMPONENT_REF
5036 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
5037 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
5038 return c_expr_sizeof_expr (expr
);
5042 /* Parse an alignof expression. */
5044 static struct c_expr
5045 c_parser_alignof_expression (c_parser
*parser
)
5048 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
5049 c_parser_consume_token (parser
);
5052 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5053 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5055 /* Either __alignof__ ( type-name ) or __alignof__
5056 unary-expression starting with a compound literal. */
5057 struct c_type_name
*type_name
;
5059 c_parser_consume_token (parser
);
5060 type_name
= c_parser_type_name (parser
);
5061 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5062 if (type_name
== NULL
)
5067 ret
.value
= error_mark_node
;
5068 ret
.original_code
= ERROR_MARK
;
5069 ret
.original_type
= NULL
;
5072 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5074 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5078 /* alignof ( type-name ). */
5081 ret
.value
= c_alignof (groktypename (type_name
, NULL
, NULL
));
5082 ret
.original_code
= ERROR_MARK
;
5083 ret
.original_type
= NULL
;
5089 expr
= c_parser_unary_expression (parser
);
5093 ret
.value
= c_alignof_expr (expr
.value
);
5094 ret
.original_code
= ERROR_MARK
;
5095 ret
.original_type
= NULL
;
5100 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5104 postfix-expression [ expression ]
5105 postfix-expression ( argument-expression-list[opt] )
5106 postfix-expression . identifier
5107 postfix-expression -> identifier
5108 postfix-expression ++
5109 postfix-expression --
5110 ( type-name ) { initializer-list }
5111 ( type-name ) { initializer-list , }
5113 argument-expression-list:
5115 argument-expression-list , argument-expression
5127 (treated as a keyword in GNU C)
5130 ( compound-statement )
5131 __builtin_va_arg ( assignment-expression , type-name )
5132 __builtin_offsetof ( type-name , offsetof-member-designator )
5133 __builtin_choose_expr ( assignment-expression ,
5134 assignment-expression ,
5135 assignment-expression )
5136 __builtin_types_compatible_p ( type-name , type-name )
5138 offsetof-member-designator:
5140 offsetof-member-designator . identifier
5141 offsetof-member-designator [ expression ]
5146 [ objc-receiver objc-message-args ]
5147 @selector ( objc-selector-arg )
5148 @protocol ( identifier )
5149 @encode ( type-name )
5153 static struct c_expr
5154 c_parser_postfix_expression (c_parser
*parser
)
5156 struct c_expr expr
, e1
, e2
, e3
;
5157 struct c_type_name
*t1
, *t2
;
5159 expr
.original_code
= ERROR_MARK
;
5160 expr
.original_type
= NULL
;
5161 switch (c_parser_peek_token (parser
)->type
)
5164 expr
.value
= c_parser_peek_token (parser
)->value
;
5165 loc
= c_parser_peek_token (parser
)->location
;
5166 c_parser_consume_token (parser
);
5167 if (TREE_CODE (expr
.value
) == FIXED_CST
5168 && !targetm
.fixed_point_supported_p ())
5170 error_at (loc
, "fixed-point types not supported for this target");
5171 expr
.value
= error_mark_node
;
5178 expr
.value
= c_parser_peek_token (parser
)->value
;
5179 c_parser_consume_token (parser
);
5185 expr
.value
= c_parser_peek_token (parser
)->value
;
5186 expr
.original_code
= STRING_CST
;
5187 c_parser_consume_token (parser
);
5189 case CPP_OBJC_STRING
:
5190 gcc_assert (c_dialect_objc ());
5192 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5193 c_parser_consume_token (parser
);
5196 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5198 c_parser_error (parser
, "expected expression");
5199 expr
.value
= error_mark_node
;
5203 tree id
= c_parser_peek_token (parser
)->value
;
5204 location_t loc
= c_parser_peek_token (parser
)->location
;
5205 c_parser_consume_token (parser
);
5206 expr
.value
= build_external_ref (id
,
5207 (c_parser_peek_token (parser
)->type
5208 == CPP_OPEN_PAREN
), loc
,
5209 &expr
.original_type
);
5212 case CPP_OPEN_PAREN
:
5213 /* A parenthesized expression, statement expression or compound
5215 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5217 /* A statement expression. */
5219 location_t here
= c_parser_peek_token (parser
)->location
;
5220 c_parser_consume_token (parser
);
5221 c_parser_consume_token (parser
);
5222 if (cur_stmt_list
== NULL
)
5224 error_at (here
, "braced-group within expression allowed "
5225 "only inside a function");
5226 parser
->error
= true;
5227 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5228 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5229 expr
.value
= error_mark_node
;
5232 stmt
= c_begin_stmt_expr ();
5233 c_parser_compound_statement_nostart (parser
);
5234 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5236 pedwarn (here
, OPT_pedantic
,
5237 "ISO C forbids braced-groups within expressions");
5238 expr
.value
= c_finish_stmt_expr (stmt
);
5240 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5242 /* A compound literal. ??? Can we actually get here rather
5243 than going directly to
5244 c_parser_postfix_expression_after_paren_type from
5246 struct c_type_name
*type_name
;
5247 c_parser_consume_token (parser
);
5248 type_name
= c_parser_type_name (parser
);
5249 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5251 if (type_name
== NULL
)
5253 expr
.value
= error_mark_node
;
5256 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5261 /* A parenthesized expression. */
5262 c_parser_consume_token (parser
);
5263 expr
= c_parser_expression (parser
);
5264 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5265 TREE_NO_WARNING (expr
.value
) = 1;
5266 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
5267 expr
.original_code
= ERROR_MARK
;
5268 /* Don't change EXPR.ORIGINAL_TYPE. */
5269 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5274 switch (c_parser_peek_token (parser
)->keyword
)
5276 case RID_FUNCTION_NAME
:
5277 case RID_PRETTY_FUNCTION_NAME
:
5278 case RID_C99_FUNCTION_NAME
:
5279 expr
.value
= fname_decl (c_parser_peek_token (parser
)->location
,
5280 c_parser_peek_token (parser
)->keyword
,
5281 c_parser_peek_token (parser
)->value
);
5282 c_parser_consume_token (parser
);
5285 c_parser_consume_token (parser
);
5286 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5288 expr
.value
= error_mark_node
;
5291 e1
= c_parser_expr_no_commas (parser
, NULL
);
5292 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
5293 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5295 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5296 expr
.value
= error_mark_node
;
5299 t1
= c_parser_type_name (parser
);
5300 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5304 expr
.value
= error_mark_node
;
5308 tree type_expr
= NULL_TREE
;
5309 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
,
5314 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
5315 TREE_TYPE (expr
.value
), type_expr
,
5317 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
5322 c_parser_consume_token (parser
);
5323 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5325 expr
.value
= error_mark_node
;
5328 t1
= c_parser_type_name (parser
);
5331 expr
.value
= error_mark_node
;
5334 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5336 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5337 expr
.value
= error_mark_node
;
5341 tree type
= groktypename (t1
, NULL
, NULL
);
5343 if (type
== error_mark_node
)
5344 offsetof_ref
= error_mark_node
;
5346 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5347 /* Parse the second argument to __builtin_offsetof. We
5348 must have one identifier, and beyond that we want to
5349 accept sub structure and sub array references. */
5350 if (c_parser_next_token_is (parser
, CPP_NAME
))
5352 offsetof_ref
= build_component_ref
5353 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5354 c_parser_consume_token (parser
);
5355 while (c_parser_next_token_is (parser
, CPP_DOT
)
5356 || c_parser_next_token_is (parser
,
5358 || c_parser_next_token_is (parser
,
5361 if (c_parser_next_token_is (parser
, CPP_DEREF
))
5363 loc
= c_parser_peek_token (parser
)->location
;
5364 offsetof_ref
= build_array_ref (offsetof_ref
,
5369 else if (c_parser_next_token_is (parser
, CPP_DOT
))
5372 c_parser_consume_token (parser
);
5373 if (c_parser_next_token_is_not (parser
,
5376 c_parser_error (parser
, "expected identifier");
5379 offsetof_ref
= build_component_ref
5381 c_parser_peek_token (parser
)->value
);
5382 c_parser_consume_token (parser
);
5387 loc
= c_parser_peek_token (parser
)->location
;
5388 c_parser_consume_token (parser
);
5389 idx
= c_parser_expression (parser
).value
;
5390 idx
= c_fully_fold (idx
, false, NULL
);
5391 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5393 offsetof_ref
= build_array_ref (offsetof_ref
, idx
, loc
);
5398 c_parser_error (parser
, "expected identifier");
5399 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5401 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5404 case RID_CHOOSE_EXPR
:
5405 c_parser_consume_token (parser
);
5406 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5408 expr
.value
= error_mark_node
;
5411 loc
= c_parser_peek_token (parser
)->location
;
5412 e1
= c_parser_expr_no_commas (parser
, NULL
);
5413 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5415 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5416 expr
.value
= error_mark_node
;
5419 e2
= c_parser_expr_no_commas (parser
, NULL
);
5420 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5422 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5423 expr
.value
= error_mark_node
;
5426 e3
= c_parser_expr_no_commas (parser
, NULL
);
5427 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5433 if (TREE_CODE (c
) != INTEGER_CST
5434 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
5436 "first argument to %<__builtin_choose_expr%> not"
5438 constant_expression_warning (c
);
5439 expr
= integer_zerop (c
) ? e3
: e2
;
5442 case RID_TYPES_COMPATIBLE_P
:
5443 c_parser_consume_token (parser
);
5444 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5446 expr
.value
= error_mark_node
;
5449 t1
= c_parser_type_name (parser
);
5452 expr
.value
= error_mark_node
;
5455 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5457 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5458 expr
.value
= error_mark_node
;
5461 t2
= c_parser_type_name (parser
);
5464 expr
.value
= error_mark_node
;
5467 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5472 e1
= TYPE_MAIN_VARIANT (groktypename (t1
, NULL
, NULL
));
5473 e2
= TYPE_MAIN_VARIANT (groktypename (t2
, NULL
, NULL
));
5475 expr
.value
= comptypes (e1
, e2
)
5476 ? build_int_cst (NULL_TREE
, 1)
5477 : build_int_cst (NULL_TREE
, 0);
5480 case RID_AT_SELECTOR
:
5481 gcc_assert (c_dialect_objc ());
5482 c_parser_consume_token (parser
);
5483 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5485 expr
.value
= error_mark_node
;
5489 tree sel
= c_parser_objc_selector_arg (parser
);
5490 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5492 expr
.value
= objc_build_selector_expr (sel
);
5495 case RID_AT_PROTOCOL
:
5496 gcc_assert (c_dialect_objc ());
5497 c_parser_consume_token (parser
);
5498 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5500 expr
.value
= error_mark_node
;
5503 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5505 c_parser_error (parser
, "expected identifier");
5506 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5507 expr
.value
= error_mark_node
;
5511 tree id
= c_parser_peek_token (parser
)->value
;
5512 c_parser_consume_token (parser
);
5513 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5515 expr
.value
= objc_build_protocol_expr (id
);
5519 /* Extension to support C-structures in the archiver. */
5520 gcc_assert (c_dialect_objc ());
5521 c_parser_consume_token (parser
);
5522 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5524 expr
.value
= error_mark_node
;
5527 t1
= c_parser_type_name (parser
);
5530 expr
.value
= error_mark_node
;
5531 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5534 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5537 tree type
= groktypename (t1
, NULL
, NULL
);
5538 expr
.value
= objc_build_encode_expr (type
);
5542 c_parser_error (parser
, "expected expression");
5543 expr
.value
= error_mark_node
;
5547 case CPP_OPEN_SQUARE
:
5548 if (c_dialect_objc ())
5550 tree receiver
, args
;
5551 c_parser_consume_token (parser
);
5552 receiver
= c_parser_objc_receiver (parser
);
5553 args
= c_parser_objc_message_args (parser
);
5554 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5556 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5560 /* Else fall through to report error. */
5562 c_parser_error (parser
, "expected expression");
5563 expr
.value
= error_mark_node
;
5566 return c_parser_postfix_expression_after_primary (parser
, expr
);
5569 /* Parse a postfix expression after a parenthesized type name: the
5570 brace-enclosed initializer of a compound literal, possibly followed
5571 by some postfix operators. This is separate because it is not
5572 possible to tell until after the type name whether a cast
5573 expression has a cast or a compound literal, or whether the operand
5574 of sizeof is a parenthesized type name or starts with a compound
5577 static struct c_expr
5578 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5579 struct c_type_name
*type_name
)
5585 location_t start_loc
;
5586 tree type_expr
= NULL_TREE
;
5587 bool type_expr_const
= true;
5588 start_init (NULL_TREE
, NULL
, 0);
5589 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
5590 start_loc
= c_parser_peek_token (parser
)->location
;
5591 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5593 error_at (start_loc
, "compound literal has variable size");
5594 type
= error_mark_node
;
5596 init
= c_parser_braced_init (parser
, type
, false);
5598 maybe_warn_string_init (type
, init
);
5601 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
5602 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
5603 ? CONSTRUCTOR_NON_CONST (init
.value
)
5604 : init
.original_code
== C_MAYBE_CONST_EXPR
);
5605 non_const
|= !type_expr_const
;
5606 expr
.value
= build_compound_literal (type
, init
.value
, non_const
);
5607 expr
.original_code
= ERROR_MARK
;
5608 expr
.original_type
= NULL
;
5611 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
5613 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
5614 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
5618 gcc_assert (!non_const
);
5619 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
5620 type_expr
, expr
.value
);
5623 return c_parser_postfix_expression_after_primary (parser
, expr
);
5626 /* Parse a postfix expression after the initial primary or compound
5627 literal; that is, parse a series of postfix operators. */
5629 static struct c_expr
5630 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5633 struct c_expr orig_expr
;
5635 VEC(tree
,gc
) *exprlist
;
5636 VEC(tree
,gc
) *origtypes
;
5637 location_t loc
= c_parser_peek_token (parser
)->location
;
5640 switch (c_parser_peek_token (parser
)->type
)
5642 case CPP_OPEN_SQUARE
:
5643 /* Array reference. */
5644 loc
= c_parser_peek_token (parser
)->location
;
5645 c_parser_consume_token (parser
);
5646 idx
= c_parser_expression (parser
).value
;
5647 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5649 expr
.value
= build_array_ref (expr
.value
, idx
, loc
);
5650 expr
.original_code
= ERROR_MARK
;
5651 expr
.original_type
= NULL
;
5653 case CPP_OPEN_PAREN
:
5654 /* Function call. */
5655 c_parser_consume_token (parser
);
5656 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5659 exprlist
= c_parser_expr_list (parser
, true, false, &origtypes
);
5660 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5663 expr
.value
= build_function_call_vec (expr
.value
, exprlist
,
5665 expr
.original_code
= ERROR_MARK
;
5666 if (TREE_CODE (expr
.value
) == INTEGER_CST
5667 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
5668 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
5669 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
5670 expr
.original_code
= C_MAYBE_CONST_EXPR
;
5671 expr
.original_type
= NULL
;
5672 if (exprlist
!= NULL
)
5674 c_parser_release_expr_list (exprlist
);
5675 c_parser_release_expr_list (origtypes
);
5679 /* Structure element reference. */
5680 c_parser_consume_token (parser
);
5681 expr
= default_function_array_conversion (expr
);
5682 if (c_parser_next_token_is (parser
, CPP_NAME
))
5683 ident
= c_parser_peek_token (parser
)->value
;
5686 c_parser_error (parser
, "expected identifier");
5687 expr
.value
= error_mark_node
;
5688 expr
.original_code
= ERROR_MARK
;
5689 expr
.original_type
= NULL
;
5692 c_parser_consume_token (parser
);
5693 expr
.value
= build_component_ref (expr
.value
, ident
);
5694 expr
.original_code
= ERROR_MARK
;
5695 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
5696 expr
.original_type
= NULL
;
5699 /* Remember the original type of a bitfield. */
5700 tree field
= TREE_OPERAND (expr
.value
, 1);
5701 if (TREE_CODE (field
) != FIELD_DECL
)
5702 expr
.original_type
= NULL
;
5704 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
5708 /* Structure element reference. */
5709 c_parser_consume_token (parser
);
5710 expr
= default_function_array_conversion (expr
);
5711 if (c_parser_next_token_is (parser
, CPP_NAME
))
5712 ident
= c_parser_peek_token (parser
)->value
;
5715 c_parser_error (parser
, "expected identifier");
5716 expr
.value
= error_mark_node
;
5717 expr
.original_code
= ERROR_MARK
;
5718 expr
.original_type
= NULL
;
5721 c_parser_consume_token (parser
);
5722 expr
.value
= build_component_ref (build_indirect_ref (loc
,
5726 expr
.original_code
= ERROR_MARK
;
5727 if (TREE_CODE (expr
.value
) != COMPONENT_REF
)
5728 expr
.original_type
= NULL
;
5731 /* Remember the original type of a bitfield. */
5732 tree field
= TREE_OPERAND (expr
.value
, 1);
5733 if (TREE_CODE (field
) != FIELD_DECL
)
5734 expr
.original_type
= NULL
;
5736 expr
.original_type
= DECL_BIT_FIELD_TYPE (field
);
5740 /* Postincrement. */
5741 c_parser_consume_token (parser
);
5742 expr
= default_function_array_conversion (expr
);
5743 expr
.value
= build_unary_op (loc
,
5744 POSTINCREMENT_EXPR
, expr
.value
, 0);
5745 expr
.original_code
= ERROR_MARK
;
5746 expr
.original_type
= NULL
;
5748 case CPP_MINUS_MINUS
:
5749 /* Postdecrement. */
5750 c_parser_consume_token (parser
);
5751 expr
= default_function_array_conversion (expr
);
5752 expr
.value
= build_unary_op (loc
,
5753 POSTDECREMENT_EXPR
, expr
.value
, 0);
5754 expr
.original_code
= ERROR_MARK
;
5755 expr
.original_type
= NULL
;
5763 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5766 assignment-expression
5767 expression , assignment-expression
5770 static struct c_expr
5771 c_parser_expression (c_parser
*parser
)
5774 expr
= c_parser_expr_no_commas (parser
, NULL
);
5775 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5778 c_parser_consume_token (parser
);
5779 next
= c_parser_expr_no_commas (parser
, NULL
);
5780 next
= default_function_array_conversion (next
);
5781 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5782 expr
.original_code
= COMPOUND_EXPR
;
5783 expr
.original_type
= NULL
;
5788 /* Parse an expression and convert functions or arrays to
5791 static struct c_expr
5792 c_parser_expression_conv (c_parser
*parser
)
5795 expr
= c_parser_expression (parser
);
5796 expr
= default_function_array_conversion (expr
);
5800 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5801 functions and arrays to pointers. If FOLD_P, fold the expressions.
5804 assignment-expression
5805 nonempty-expr-list , assignment-expression
5808 /* We cache two vectors, to save most allocation and deallocation. */
5809 static GTY((deletable
)) VEC(tree
,gc
) *cached_expr_list_1
;
5810 static GTY((deletable
)) VEC(tree
,gc
) *cached_expr_list_2
;
5812 static VEC(tree
,gc
) *
5813 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
,
5814 VEC(tree
,gc
) **p_orig_types
)
5817 VEC(tree
,gc
) *orig_types
;
5820 if (cached_expr_list_1
!= NULL
)
5822 ret
= cached_expr_list_1
;
5823 cached_expr_list_1
= NULL
;
5824 VEC_truncate (tree
, ret
, 0);
5826 else if (cached_expr_list_2
!= NULL
)
5828 ret
= cached_expr_list_2
;
5829 cached_expr_list_2
= NULL
;
5830 VEC_truncate (tree
, ret
, 0);
5833 ret
= VEC_alloc (tree
, gc
, 16);
5835 if (p_orig_types
== NULL
)
5839 if (cached_expr_list_2
!= NULL
)
5841 orig_types
= cached_expr_list_2
;
5842 cached_expr_list_2
= NULL
;
5843 VEC_truncate (tree
, orig_types
, 0);
5846 orig_types
= VEC_alloc (tree
, gc
, 16);
5849 expr
= c_parser_expr_no_commas (parser
, NULL
);
5851 expr
= default_function_array_conversion (expr
);
5853 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5854 VEC_quick_push (tree
, ret
, expr
.value
);
5855 if (orig_types
!= NULL
)
5856 VEC_quick_push (tree
, orig_types
, expr
.original_type
);
5857 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5859 c_parser_consume_token (parser
);
5860 expr
= c_parser_expr_no_commas (parser
, NULL
);
5862 expr
= default_function_array_conversion (expr
);
5864 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5865 VEC_safe_push (tree
, gc
, ret
, expr
.value
);
5866 if (orig_types
!= NULL
)
5867 VEC_safe_push (tree
, gc
, orig_types
, expr
.original_type
);
5869 if (orig_types
!= NULL
)
5870 *p_orig_types
= orig_types
;
5874 /* Release a vector returned by c_parser_expr_list. */
5877 c_parser_release_expr_list (VEC(tree
,gc
) *vec
)
5879 if (cached_expr_list_1
== NULL
)
5880 cached_expr_list_1
= vec
;
5881 else if (cached_expr_list_2
== NULL
)
5882 cached_expr_list_2
= vec
;
5884 VEC_free (tree
, gc
, vec
);
5887 /* Convert a vector, as returned by c_parser_expr_list, to a
5891 c_parser_vec_to_tree_list (VEC(tree
,gc
) *vec
)
5893 tree ret
= NULL_TREE
;
5897 for (i
= 0; VEC_iterate (tree
, vec
, i
, t
); ++i
)
5899 *pp
= build_tree_list (NULL
, t
);
5900 pp
= &TREE_CHAIN (*pp
);
5905 /* Parse Objective-C-specific constructs. */
5907 /* Parse an objc-class-definition.
5909 objc-class-definition:
5910 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5911 objc-class-instance-variables[opt] objc-methodprotolist @end
5912 @implementation identifier objc-superclass[opt]
5913 objc-class-instance-variables[opt]
5914 @interface identifier ( identifier ) objc-protocol-refs[opt]
5915 objc-methodprotolist @end
5916 @implementation identifier ( identifier )
5921 "@interface identifier (" must start "@interface identifier (
5922 identifier ) ...": objc-methodprotolist in the first production may
5923 not start with a parenthesized identifier as a declarator of a data
5924 definition with no declaration specifiers if the objc-superclass,
5925 objc-protocol-refs and objc-class-instance-variables are omitted. */
5928 c_parser_objc_class_definition (c_parser
*parser
)
5933 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5935 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5939 c_parser_consume_token (parser
);
5940 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5942 c_parser_error (parser
, "expected identifier");
5945 id1
= c_parser_peek_token (parser
)->value
;
5946 c_parser_consume_token (parser
);
5947 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5950 tree proto
= NULL_TREE
;
5951 c_parser_consume_token (parser
);
5952 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5954 c_parser_error (parser
, "expected identifier");
5955 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5958 id2
= c_parser_peek_token (parser
)->value
;
5959 c_parser_consume_token (parser
);
5960 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5963 objc_start_category_implementation (id1
, id2
);
5966 if (c_parser_next_token_is (parser
, CPP_LESS
))
5967 proto
= c_parser_objc_protocol_refs (parser
);
5968 objc_start_category_interface (id1
, id2
, proto
);
5969 c_parser_objc_methodprotolist (parser
);
5970 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5971 objc_finish_interface ();
5974 if (c_parser_next_token_is (parser
, CPP_COLON
))
5976 c_parser_consume_token (parser
);
5977 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5979 c_parser_error (parser
, "expected identifier");
5982 superclass
= c_parser_peek_token (parser
)->value
;
5983 c_parser_consume_token (parser
);
5986 superclass
= NULL_TREE
;
5989 tree proto
= NULL_TREE
;
5990 if (c_parser_next_token_is (parser
, CPP_LESS
))
5991 proto
= c_parser_objc_protocol_refs (parser
);
5992 objc_start_class_interface (id1
, superclass
, proto
);
5995 objc_start_class_implementation (id1
, superclass
);
5996 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5997 c_parser_objc_class_instance_variables (parser
);
6000 objc_continue_interface ();
6001 c_parser_objc_methodprotolist (parser
);
6002 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6003 objc_finish_interface ();
6007 objc_continue_implementation ();
6012 /* Parse objc-class-instance-variables.
6014 objc-class-instance-variables:
6015 { objc-instance-variable-decl-list[opt] }
6017 objc-instance-variable-decl-list:
6018 objc-visibility-spec
6019 objc-instance-variable-decl ;
6021 objc-instance-variable-decl-list objc-visibility-spec
6022 objc-instance-variable-decl-list objc-instance-variable-decl ;
6023 objc-instance-variable-decl-list ;
6025 objc-visibility-spec:
6030 objc-instance-variable-decl:
6035 c_parser_objc_class_instance_variables (c_parser
*parser
)
6037 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
6038 c_parser_consume_token (parser
);
6039 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
6042 /* Parse any stray semicolon. */
6043 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6045 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6046 "extra semicolon in struct or union specified");
6047 c_parser_consume_token (parser
);
6050 /* Stop if at the end of the instance variables. */
6051 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
6053 c_parser_consume_token (parser
);
6056 /* Parse any objc-visibility-spec. */
6057 if (c_parser_next_token_is_keyword (parser
, RID_PRIVATE
))
6059 c_parser_consume_token (parser
);
6060 objc_set_visibility (2);
6063 else if (c_parser_next_token_is_keyword (parser
, RID_PROTECTED
))
6065 c_parser_consume_token (parser
);
6066 objc_set_visibility (0);
6069 else if (c_parser_next_token_is_keyword (parser
, RID_PUBLIC
))
6071 c_parser_consume_token (parser
);
6072 objc_set_visibility (1);
6075 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
6077 c_parser_pragma (parser
, pragma_external
);
6081 /* Parse some comma-separated declarations. */
6082 decls
= c_parser_struct_declaration (parser
);
6084 /* Comma-separated instance variables are chained together in
6085 reverse order; add them one by one. */
6086 tree ivar
= nreverse (decls
);
6087 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
6088 objc_add_instance_variable (copy_node (ivar
));
6090 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6094 /* Parse an objc-class-declaration.
6096 objc-class-declaration:
6097 @class identifier-list ;
6101 c_parser_objc_class_declaration (c_parser
*parser
)
6103 tree list
= NULL_TREE
;
6104 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_CLASS
));
6105 c_parser_consume_token (parser
);
6106 /* Any identifiers, including those declared as type names, are OK
6111 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6113 c_parser_error (parser
, "expected identifier");
6116 id
= c_parser_peek_token (parser
)->value
;
6117 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6118 c_parser_consume_token (parser
);
6119 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6120 c_parser_consume_token (parser
);
6124 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6125 objc_declare_class (list
);
6128 /* Parse an objc-alias-declaration.
6130 objc-alias-declaration:
6131 @compatibility_alias identifier identifier ;
6135 c_parser_objc_alias_declaration (c_parser
*parser
)
6138 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
6139 c_parser_consume_token (parser
);
6140 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6142 c_parser_error (parser
, "expected identifier");
6143 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
6146 id1
= c_parser_peek_token (parser
)->value
;
6147 c_parser_consume_token (parser
);
6148 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6150 c_parser_error (parser
, "expected identifier");
6151 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
6154 id2
= c_parser_peek_token (parser
)->value
;
6155 c_parser_consume_token (parser
);
6156 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6157 objc_declare_alias (id1
, id2
);
6160 /* Parse an objc-protocol-definition.
6162 objc-protocol-definition:
6163 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
6164 @protocol identifier-list ;
6166 "@protocol identifier ;" should be resolved as "@protocol
6167 identifier-list ;": objc-methodprotolist may not start with a
6168 semicolon in the first alternative if objc-protocol-refs are
6172 c_parser_objc_protocol_definition (c_parser
*parser
)
6174 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
6175 c_parser_consume_token (parser
);
6176 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6178 c_parser_error (parser
, "expected identifier");
6181 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
6182 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
6184 tree list
= NULL_TREE
;
6185 /* Any identifiers, including those declared as type names, are
6190 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6192 c_parser_error (parser
, "expected identifier");
6195 id
= c_parser_peek_token (parser
)->value
;
6196 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6197 c_parser_consume_token (parser
);
6198 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6199 c_parser_consume_token (parser
);
6203 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6204 objc_declare_protocols (list
);
6208 tree id
= c_parser_peek_token (parser
)->value
;
6209 tree proto
= NULL_TREE
;
6210 c_parser_consume_token (parser
);
6211 if (c_parser_next_token_is (parser
, CPP_LESS
))
6212 proto
= c_parser_objc_protocol_refs (parser
);
6213 parser
->objc_pq_context
= true;
6214 objc_start_protocol (id
, proto
);
6215 c_parser_objc_methodprotolist (parser
);
6216 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6217 parser
->objc_pq_context
= false;
6218 objc_finish_interface ();
6222 /* Parse an objc-method-type.
6229 static enum tree_code
6230 c_parser_objc_method_type (c_parser
*parser
)
6232 switch (c_parser_peek_token (parser
)->type
)
6235 c_parser_consume_token (parser
);
6238 c_parser_consume_token (parser
);
6245 /* Parse an objc-method-definition.
6247 objc-method-definition:
6248 objc-method-type objc-method-decl ;[opt] compound-statement
6252 c_parser_objc_method_definition (c_parser
*parser
)
6254 enum tree_code type
= c_parser_objc_method_type (parser
);
6256 objc_set_method_type (type
);
6257 parser
->objc_pq_context
= true;
6258 decl
= c_parser_objc_method_decl (parser
);
6259 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6261 c_parser_consume_token (parser
);
6262 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6263 "extra semicolon in method definition specified");
6265 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6267 c_parser_error (parser
, "expected %<{%>");
6270 parser
->objc_pq_context
= false;
6271 objc_start_method_definition (decl
);
6272 add_stmt (c_parser_compound_statement (parser
));
6273 objc_finish_method_definition (current_function_decl
);
6276 /* Parse an objc-methodprotolist.
6278 objc-methodprotolist:
6280 objc-methodprotolist objc-methodproto
6281 objc-methodprotolist declaration
6282 objc-methodprotolist ;
6284 The declaration is a data definition, which may be missing
6285 declaration specifiers under the same rules and diagnostics as
6286 other data definitions outside functions, and the stray semicolon
6287 is diagnosed the same way as a stray semicolon outside a
6291 c_parser_objc_methodprotolist (c_parser
*parser
)
6295 /* The list is terminated by @end. */
6296 switch (c_parser_peek_token (parser
)->type
)
6299 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6300 "ISO C does not allow extra %<;%> outside of a function");
6301 c_parser_consume_token (parser
);
6305 c_parser_objc_methodproto (parser
);
6308 c_parser_pragma (parser
, pragma_external
);
6313 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6315 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6321 /* Parse an objc-methodproto.
6324 objc-method-type objc-method-decl ;
6328 c_parser_objc_methodproto (c_parser
*parser
)
6330 enum tree_code type
= c_parser_objc_method_type (parser
);
6332 objc_set_method_type (type
);
6333 /* Remember protocol qualifiers in prototypes. */
6334 parser
->objc_pq_context
= true;
6335 decl
= c_parser_objc_method_decl (parser
);
6336 /* Forget protocol qualifiers here. */
6337 parser
->objc_pq_context
= false;
6338 objc_add_method_declaration (decl
);
6339 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6342 /* Parse an objc-method-decl.
6345 ( objc-type-name ) objc-selector
6347 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6348 objc-keyword-selector objc-optparmlist
6350 objc-keyword-selector:
6352 objc-keyword-selector objc-keyword-decl
6355 objc-selector : ( objc-type-name ) identifier
6356 objc-selector : identifier
6357 : ( objc-type-name ) identifier
6361 objc-optparms objc-optellipsis
6365 objc-opt-parms , parameter-declaration
6373 c_parser_objc_method_decl (c_parser
*parser
)
6375 tree type
= NULL_TREE
;
6377 tree parms
= NULL_TREE
;
6378 bool ellipsis
= false;
6380 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6382 c_parser_consume_token (parser
);
6383 type
= c_parser_objc_type_name (parser
);
6384 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6386 sel
= c_parser_objc_selector (parser
);
6387 /* If there is no selector, or a colon follows, we have an
6388 objc-keyword-selector. If there is a selector, and a colon does
6389 not follow, that selector ends the objc-method-decl. */
6390 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6393 tree list
= NULL_TREE
;
6396 tree atype
= NULL_TREE
, id
, keyworddecl
;
6397 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6399 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6401 c_parser_consume_token (parser
);
6402 atype
= c_parser_objc_type_name (parser
);
6403 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6406 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6408 c_parser_error (parser
, "expected identifier");
6409 return error_mark_node
;
6411 id
= c_parser_peek_token (parser
)->value
;
6412 c_parser_consume_token (parser
);
6413 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6414 list
= chainon (list
, keyworddecl
);
6415 tsel
= c_parser_objc_selector (parser
);
6416 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6419 /* Parse the optional parameter list. Optional Objective-C
6420 method parameters follow the C syntax, and may include '...'
6421 to denote a variable number of arguments. */
6422 parms
= make_node (TREE_LIST
);
6423 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6425 struct c_parm
*parm
;
6426 c_parser_consume_token (parser
);
6427 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6430 c_parser_consume_token (parser
);
6433 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6436 parms
= chainon (parms
,
6437 build_tree_list (NULL_TREE
, grokparm (parm
)));
6441 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6444 /* Parse an objc-type-name.
6447 objc-type-qualifiers[opt] type-name
6448 objc-type-qualifiers[opt]
6450 objc-type-qualifiers:
6452 objc-type-qualifiers objc-type-qualifier
6454 objc-type-qualifier: one of
6455 in out inout bycopy byref oneway
6459 c_parser_objc_type_name (c_parser
*parser
)
6461 tree quals
= NULL_TREE
;
6462 struct c_type_name
*type_name
= NULL
;
6463 tree type
= NULL_TREE
;
6466 c_token
*token
= c_parser_peek_token (parser
);
6467 if (token
->type
== CPP_KEYWORD
6468 && (token
->keyword
== RID_IN
6469 || token
->keyword
== RID_OUT
6470 || token
->keyword
== RID_INOUT
6471 || token
->keyword
== RID_BYCOPY
6472 || token
->keyword
== RID_BYREF
6473 || token
->keyword
== RID_ONEWAY
))
6475 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6476 c_parser_consume_token (parser
);
6481 if (c_parser_next_token_starts_typename (parser
))
6482 type_name
= c_parser_type_name (parser
);
6484 type
= groktypename (type_name
, NULL
, NULL
);
6485 return build_tree_list (quals
, type
);
6488 /* Parse objc-protocol-refs.
6495 c_parser_objc_protocol_refs (c_parser
*parser
)
6497 tree list
= NULL_TREE
;
6498 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6499 c_parser_consume_token (parser
);
6500 /* Any identifiers, including those declared as type names, are OK
6505 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6507 c_parser_error (parser
, "expected identifier");
6510 id
= c_parser_peek_token (parser
)->value
;
6511 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6512 c_parser_consume_token (parser
);
6513 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6514 c_parser_consume_token (parser
);
6518 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6522 /* Parse an objc-try-catch-statement.
6524 objc-try-catch-statement:
6525 @try compound-statement objc-catch-list[opt]
6526 @try compound-statement objc-catch-list[opt] @finally compound-statement
6529 @catch ( parameter-declaration ) compound-statement
6530 objc-catch-list @catch ( parameter-declaration ) compound-statement
6534 c_parser_objc_try_catch_statement (c_parser
*parser
)
6538 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TRY
));
6539 c_parser_consume_token (parser
);
6540 loc
= c_parser_peek_token (parser
)->location
;
6541 stmt
= c_parser_compound_statement (parser
);
6542 objc_begin_try_stmt (loc
, stmt
);
6543 while (c_parser_next_token_is_keyword (parser
, RID_CATCH
))
6545 struct c_parm
*parm
;
6546 c_parser_consume_token (parser
);
6547 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6549 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6552 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6555 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6556 objc_begin_catch_clause (grokparm (parm
));
6557 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6558 c_parser_compound_statement_nostart (parser
);
6559 objc_finish_catch_clause ();
6561 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6565 c_parser_consume_token (parser
);
6566 finloc
= c_parser_peek_token (parser
)->location
;
6567 finstmt
= c_parser_compound_statement (parser
);
6568 objc_build_finally_clause (finloc
, finstmt
);
6570 objc_finish_try_stmt ();
6573 /* Parse an objc-synchronized-statement.
6575 objc-synchronized-statement:
6576 @synchronized ( expression ) compound-statement
6580 c_parser_objc_synchronized_statement (c_parser
*parser
)
6584 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6585 c_parser_consume_token (parser
);
6586 loc
= c_parser_peek_token (parser
)->location
;
6587 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6589 expr
= c_parser_expression (parser
).value
;
6590 expr
= c_fully_fold (expr
, false, NULL
);
6591 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6594 expr
= error_mark_node
;
6595 stmt
= c_parser_compound_statement (parser
);
6596 objc_build_synchronized (loc
, expr
, stmt
);
6599 /* Parse an objc-selector; return NULL_TREE without an error if the
6600 next token is not an objc-selector.
6605 enum struct union if else while do for switch case default
6606 break continue return goto asm sizeof typeof __alignof
6607 unsigned long const short volatile signed restrict _Complex
6608 in out inout bycopy byref oneway int char float double void _Bool
6610 ??? Why this selection of keywords but not, for example, storage
6611 class specifiers? */
6614 c_parser_objc_selector (c_parser
*parser
)
6616 c_token
*token
= c_parser_peek_token (parser
);
6617 tree value
= token
->value
;
6618 if (token
->type
== CPP_NAME
)
6620 c_parser_consume_token (parser
);
6623 if (token
->type
!= CPP_KEYWORD
)
6625 switch (token
->keyword
)
6666 c_parser_consume_token (parser
);
6673 /* Parse an objc-selector-arg.
6677 objc-keywordname-list
6679 objc-keywordname-list:
6681 objc-keywordname-list objc-keywordname
6689 c_parser_objc_selector_arg (c_parser
*parser
)
6691 tree sel
= c_parser_objc_selector (parser
);
6692 tree list
= NULL_TREE
;
6693 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6697 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6699 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6700 sel
= c_parser_objc_selector (parser
);
6701 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6707 /* Parse an objc-receiver.
6716 c_parser_objc_receiver (c_parser
*parser
)
6718 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6719 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6720 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6722 tree id
= c_parser_peek_token (parser
)->value
;
6723 c_parser_consume_token (parser
);
6724 return objc_get_class_reference (id
);
6726 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
6729 /* Parse objc-message-args.
6733 objc-keywordarg-list
6735 objc-keywordarg-list:
6737 objc-keywordarg-list objc-keywordarg
6740 objc-selector : objc-keywordexpr
6745 c_parser_objc_message_args (c_parser
*parser
)
6747 tree sel
= c_parser_objc_selector (parser
);
6748 tree list
= NULL_TREE
;
6749 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6754 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6756 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6757 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6758 sel
= c_parser_objc_selector (parser
);
6759 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6765 /* Parse an objc-keywordexpr.
6772 c_parser_objc_keywordexpr (c_parser
*parser
)
6775 VEC(tree
,gc
) *expr_list
= c_parser_expr_list (parser
, true, true, NULL
);
6776 if (VEC_length (tree
, expr_list
) == 1)
6778 /* Just return the expression, remove a level of
6780 ret
= VEC_index (tree
, expr_list
, 0);
6784 /* We have a comma expression, we will collapse later. */
6785 ret
= c_parser_vec_to_tree_list (expr_list
);
6787 c_parser_release_expr_list (expr_list
);
6792 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6793 should be considered, statements. ALLOW_STMT is true if we're within
6794 the context of a function and such pragmas are to be allowed. Returns
6795 true if we actually parsed such a pragma. */
6798 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6802 id
= c_parser_peek_token (parser
)->pragma_kind
;
6803 gcc_assert (id
!= PRAGMA_NONE
);
6807 case PRAGMA_OMP_BARRIER
:
6808 if (context
!= pragma_compound
)
6810 if (context
== pragma_stmt
)
6811 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6812 "used in compound statements");
6815 c_parser_omp_barrier (parser
);
6818 case PRAGMA_OMP_FLUSH
:
6819 if (context
!= pragma_compound
)
6821 if (context
== pragma_stmt
)
6822 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6823 "used in compound statements");
6826 c_parser_omp_flush (parser
);
6829 case PRAGMA_OMP_TASKWAIT
:
6830 if (context
!= pragma_compound
)
6832 if (context
== pragma_stmt
)
6833 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
6834 "used in compound statements");
6837 c_parser_omp_taskwait (parser
);
6840 case PRAGMA_OMP_THREADPRIVATE
:
6841 c_parser_omp_threadprivate (parser
);
6844 case PRAGMA_OMP_SECTION
:
6845 error_at (c_parser_peek_token (parser
)->location
,
6846 "%<#pragma omp section%> may only be used in "
6847 "%<#pragma omp sections%> construct");
6848 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6851 case PRAGMA_GCC_PCH_PREPROCESS
:
6852 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6853 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6857 if (id
< PRAGMA_FIRST_EXTERNAL
)
6859 if (context
== pragma_external
)
6862 c_parser_error (parser
, "expected declaration specifiers");
6863 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6866 c_parser_omp_construct (parser
);
6872 c_parser_consume_pragma (parser
);
6873 c_invoke_pragma_handler (id
);
6875 /* Skip to EOL, but suppress any error message. Those will have been
6876 generated by the handler routine through calling error, as opposed
6877 to calling c_parser_error. */
6878 parser
->error
= true;
6879 c_parser_skip_to_pragma_eol (parser
);
6884 /* The interface the pragma parsers have to the lexer. */
6887 pragma_lex (tree
*value
)
6889 c_token
*tok
= c_parser_peek_token (the_parser
);
6890 enum cpp_ttype ret
= tok
->type
;
6892 *value
= tok
->value
;
6893 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6897 if (ret
== CPP_KEYWORD
)
6899 c_parser_consume_token (the_parser
);
6906 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6910 c_parser_consume_pragma (parser
);
6911 if (c_parser_next_token_is (parser
, CPP_STRING
))
6913 name
= c_parser_peek_token (parser
)->value
;
6914 c_parser_consume_token (parser
);
6917 c_parser_error (parser
, "expected string literal");
6918 c_parser_skip_to_pragma_eol (parser
);
6921 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6924 /* OpenMP 2.5 parsing routines. */
6926 /* Returns name of the next clause.
6927 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6928 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6929 returned and the token is consumed. */
6931 static pragma_omp_clause
6932 c_parser_omp_clause_name (c_parser
*parser
)
6934 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6936 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6937 result
= PRAGMA_OMP_CLAUSE_IF
;
6938 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6939 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6940 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6942 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6947 if (!strcmp ("collapse", p
))
6948 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
6949 else if (!strcmp ("copyin", p
))
6950 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6951 else if (!strcmp ("copyprivate", p
))
6952 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6955 if (!strcmp ("firstprivate", p
))
6956 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6959 if (!strcmp ("lastprivate", p
))
6960 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6963 if (!strcmp ("nowait", p
))
6964 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6965 else if (!strcmp ("num_threads", p
))
6966 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6969 if (!strcmp ("ordered", p
))
6970 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6973 if (!strcmp ("private", p
))
6974 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6977 if (!strcmp ("reduction", p
))
6978 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6981 if (!strcmp ("schedule", p
))
6982 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6983 else if (!strcmp ("shared", p
))
6984 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6987 if (!strcmp ("untied", p
))
6988 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
6993 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6994 c_parser_consume_token (parser
);
6999 /* Validate that a clause of the given type does not already exist. */
7002 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
7007 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
7008 if (OMP_CLAUSE_CODE (c
) == code
)
7010 error ("too many %qs clauses", name
);
7018 variable-list , identifier
7020 If KIND is nonzero, create the appropriate node and install the decl
7021 in OMP_CLAUSE_DECL and add the node to the head of the list.
7023 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
7024 return the list created. */
7027 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
7030 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
7031 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
7032 c_parser_error (parser
, "expected identifier");
7034 while (c_parser_next_token_is (parser
, CPP_NAME
)
7035 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
7037 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
7040 undeclared_variable (c_parser_peek_token (parser
)->value
,
7041 c_parser_peek_token (parser
)->location
);
7042 else if (t
== error_mark_node
)
7046 tree u
= build_omp_clause (kind
);
7047 OMP_CLAUSE_DECL (u
) = t
;
7048 OMP_CLAUSE_CHAIN (u
) = list
;
7052 list
= tree_cons (t
, NULL_TREE
, list
);
7054 c_parser_consume_token (parser
);
7056 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
7059 c_parser_consume_token (parser
);
7065 /* Similarly, but expect leading and trailing parenthesis. This is a very
7066 common case for omp clauses. */
7069 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
7072 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7074 list
= c_parser_omp_variable_list (parser
, kind
, list
);
7075 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7081 collapse ( constant-expression ) */
7084 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
7086 tree c
, num
= error_mark_node
;
7090 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
7092 loc
= c_parser_peek_token (parser
)->location
;
7093 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7095 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
7096 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7098 if (num
== error_mark_node
)
7100 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
7101 || !host_integerp (num
, 0)
7102 || (n
= tree_low_cst (num
, 0)) <= 0
7106 "collapse argument needs positive constant integer expression");
7109 c
= build_omp_clause (OMP_CLAUSE_COLLAPSE
);
7110 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
7111 OMP_CLAUSE_CHAIN (c
) = list
;
7116 copyin ( variable-list ) */
7119 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
7121 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
7125 copyprivate ( variable-list ) */
7128 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
7130 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
7134 default ( shared | none ) */
7137 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
7139 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
7142 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7144 if (c_parser_next_token_is (parser
, CPP_NAME
))
7146 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7151 if (strcmp ("none", p
) != 0)
7153 kind
= OMP_CLAUSE_DEFAULT_NONE
;
7157 if (strcmp ("shared", p
) != 0)
7159 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
7166 c_parser_consume_token (parser
);
7171 c_parser_error (parser
, "expected %<none%> or %<shared%>");
7173 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7175 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
7178 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
7179 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
7180 OMP_CLAUSE_CHAIN (c
) = list
;
7181 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
7187 firstprivate ( variable-list ) */
7190 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
7192 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
7196 if ( expression ) */
7199 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
7201 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7203 tree t
= c_parser_paren_condition (parser
);
7206 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
7208 c
= build_omp_clause (OMP_CLAUSE_IF
);
7209 OMP_CLAUSE_IF_EXPR (c
) = t
;
7210 OMP_CLAUSE_CHAIN (c
) = list
;
7214 c_parser_error (parser
, "expected %<(%>");
7220 lastprivate ( variable-list ) */
7223 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
7225 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
7232 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7236 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
7238 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
7239 OMP_CLAUSE_CHAIN (c
) = list
;
7244 num_threads ( expression ) */
7247 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
7249 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7251 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
7252 tree c
, t
= c_parser_expression (parser
).value
;
7253 t
= c_fully_fold (t
, false, NULL
);
7255 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7257 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
7259 c_parser_error (parser
, "expected integer expression");
7263 /* Attempt to statically determine when the number isn't positive. */
7264 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
7265 build_int_cst (TREE_TYPE (t
), 0));
7266 if (c
== boolean_true_node
)
7268 warning_at (expr_loc
, 0,
7269 "%<num_threads%> value must be positive");
7270 t
= integer_one_node
;
7273 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
7275 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
7276 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
7277 OMP_CLAUSE_CHAIN (c
) = list
;
7288 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7292 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
7294 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
7295 OMP_CLAUSE_CHAIN (c
) = list
;
7300 private ( variable-list ) */
7303 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
7305 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
7309 reduction ( reduction-operator : variable-list )
7312 One of: + * - & ^ | && || */
7315 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
7317 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7319 enum tree_code code
;
7321 switch (c_parser_peek_token (parser
)->type
)
7333 code
= BIT_AND_EXPR
;
7336 code
= BIT_XOR_EXPR
;
7339 code
= BIT_IOR_EXPR
;
7342 code
= TRUTH_ANDIF_EXPR
;
7345 code
= TRUTH_ORIF_EXPR
;
7348 c_parser_error (parser
,
7349 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7350 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7351 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7354 c_parser_consume_token (parser
);
7355 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7359 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7360 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7361 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7365 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7371 schedule ( schedule-kind )
7372 schedule ( schedule-kind , expression )
7375 static | dynamic | guided | runtime | auto
7379 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7383 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7386 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7388 if (c_parser_next_token_is (parser
, CPP_NAME
))
7390 tree kind
= c_parser_peek_token (parser
)->value
;
7391 const char *p
= IDENTIFIER_POINTER (kind
);
7396 if (strcmp ("dynamic", p
) != 0)
7398 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7402 if (strcmp ("guided", p
) != 0)
7404 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7408 if (strcmp ("runtime", p
) != 0)
7410 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7417 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7418 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7419 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
7420 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
7424 c_parser_consume_token (parser
);
7425 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7428 c_parser_consume_token (parser
);
7430 here
= c_parser_peek_token (parser
)->location
;
7431 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7432 t
= c_fully_fold (t
, false, NULL
);
7434 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7435 error_at (here
, "schedule %<runtime%> does not take "
7436 "a %<chunk_size%> parameter");
7437 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
7439 "schedule %<auto%> does not take "
7440 "a %<chunk_size%> parameter");
7441 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7442 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7444 c_parser_error (parser
, "expected integer expression");
7446 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7449 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7450 "expected %<,%> or %<)%>");
7452 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7453 OMP_CLAUSE_CHAIN (c
) = list
;
7457 c_parser_error (parser
, "invalid schedule kind");
7458 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7463 shared ( variable-list ) */
7466 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7468 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7475 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7479 /* FIXME: Should we allow duplicates? */
7480 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
7482 c
= build_omp_clause (OMP_CLAUSE_UNTIED
);
7483 OMP_CLAUSE_CHAIN (c
) = list
;
7487 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7488 is a bitmask in MASK. Return the list of clauses found; the result
7489 of clause default goes in *pdefault. */
7492 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7495 tree clauses
= NULL
;
7498 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7501 pragma_omp_clause c_kind
;
7503 tree prev
= clauses
;
7505 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
7506 c_parser_consume_token (parser
);
7509 here
= c_parser_peek_token (parser
)->location
;
7510 c_kind
= c_parser_omp_clause_name (parser
);
7514 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
7515 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
7516 c_name
= "collapse";
7518 case PRAGMA_OMP_CLAUSE_COPYIN
:
7519 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7522 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7523 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7524 c_name
= "copyprivate";
7526 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7527 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7530 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7531 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7532 c_name
= "firstprivate";
7534 case PRAGMA_OMP_CLAUSE_IF
:
7535 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7538 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7539 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7540 c_name
= "lastprivate";
7542 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7543 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7546 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7547 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7548 c_name
= "num_threads";
7550 case PRAGMA_OMP_CLAUSE_ORDERED
:
7551 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7554 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7555 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7558 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7559 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7560 c_name
= "reduction";
7562 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7563 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7564 c_name
= "schedule";
7566 case PRAGMA_OMP_CLAUSE_SHARED
:
7567 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7570 case PRAGMA_OMP_CLAUSE_UNTIED
:
7571 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
7575 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7579 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7581 /* Remove the invalid clause(s) from the list to avoid
7582 confusing the rest of the compiler. */
7584 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
7589 c_parser_skip_to_pragma_eol (parser
);
7591 return c_finish_omp_clauses (clauses
);
7598 In practice, we're also interested in adding the statement to an
7599 outer node. So it is convenient if we work around the fact that
7600 c_parser_statement calls add_stmt. */
7603 c_parser_omp_structured_block (c_parser
*parser
)
7605 tree stmt
= push_stmt_list ();
7606 c_parser_statement (parser
);
7607 return pop_stmt_list (stmt
);
7611 # pragma omp atomic new-line
7615 x binop= expr | x++ | ++x | x-- | --x
7617 +, *, -, /, &, ^, |, <<, >>
7619 where x is an lvalue expression with scalar type. */
7622 c_parser_omp_atomic (c_parser
*parser
)
7626 enum tree_code code
;
7627 struct c_expr rhs_expr
;
7629 c_parser_skip_to_pragma_eol (parser
);
7631 lhs
= c_parser_unary_expression (parser
).value
;
7632 lhs
= c_fully_fold (lhs
, false, NULL
);
7633 switch (TREE_CODE (lhs
))
7637 c_parser_skip_to_end_of_block_or_statement (parser
);
7640 case PREINCREMENT_EXPR
:
7641 case POSTINCREMENT_EXPR
:
7642 lhs
= TREE_OPERAND (lhs
, 0);
7644 rhs
= integer_one_node
;
7647 case PREDECREMENT_EXPR
:
7648 case POSTDECREMENT_EXPR
:
7649 lhs
= TREE_OPERAND (lhs
, 0);
7651 rhs
= integer_one_node
;
7655 switch (c_parser_peek_token (parser
)->type
)
7661 code
= TRUNC_DIV_EXPR
;
7676 code
= BIT_AND_EXPR
;
7679 code
= BIT_IOR_EXPR
;
7682 code
= BIT_XOR_EXPR
;
7685 c_parser_error (parser
,
7686 "invalid operator for %<#pragma omp atomic%>");
7690 c_parser_consume_token (parser
);
7691 rhs_expr
= c_parser_expression (parser
);
7692 rhs_expr
= default_function_array_conversion (rhs_expr
);
7693 rhs
= rhs_expr
.value
;
7694 rhs
= c_fully_fold (rhs
, false, NULL
);
7697 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7698 if (stmt
!= error_mark_node
)
7700 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7705 # pragma omp barrier new-line
7709 c_parser_omp_barrier (c_parser
*parser
)
7711 c_parser_consume_pragma (parser
);
7712 c_parser_skip_to_pragma_eol (parser
);
7714 c_finish_omp_barrier ();
7718 # pragma omp critical [(name)] new-line
7723 c_parser_omp_critical (c_parser
*parser
)
7725 tree stmt
, name
= NULL
;
7727 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7729 c_parser_consume_token (parser
);
7730 if (c_parser_next_token_is (parser
, CPP_NAME
))
7732 name
= c_parser_peek_token (parser
)->value
;
7733 c_parser_consume_token (parser
);
7734 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7737 c_parser_error (parser
, "expected identifier");
7739 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7740 c_parser_error (parser
, "expected %<(%> or end of line");
7741 c_parser_skip_to_pragma_eol (parser
);
7743 stmt
= c_parser_omp_structured_block (parser
);
7744 return c_finish_omp_critical (stmt
, name
);
7748 # pragma omp flush flush-vars[opt] new-line
7751 ( variable-list ) */
7754 c_parser_omp_flush (c_parser
*parser
)
7756 c_parser_consume_pragma (parser
);
7757 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7758 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
7759 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7760 c_parser_error (parser
, "expected %<(%> or end of line");
7761 c_parser_skip_to_pragma_eol (parser
);
7763 c_finish_omp_flush ();
7766 /* Parse the restricted form of the for statement allowed by OpenMP.
7767 The real trick here is to determine the loop control variable early
7768 so that we can push a new decl if necessary to make it private. */
7771 c_parser_omp_for_loop (c_parser
*parser
, tree clauses
, tree
*par_clauses
)
7773 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
7774 tree declv
, condv
, incrv
, initv
, for_block
= NULL
, ret
= NULL
;
7776 bool fail
= false, open_brace_parsed
= false;
7777 int i
, collapse
= 1, nbraces
= 0;
7779 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
7780 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
7781 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
7783 gcc_assert (collapse
>= 1);
7785 declv
= make_tree_vec (collapse
);
7786 initv
= make_tree_vec (collapse
);
7787 condv
= make_tree_vec (collapse
);
7788 incrv
= make_tree_vec (collapse
);
7790 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7792 c_parser_error (parser
, "for statement expected");
7795 loc
= c_parser_peek_token (parser
)->location
;
7796 c_parser_consume_token (parser
);
7798 for (i
= 0; i
< collapse
; i
++)
7802 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7805 /* Parse the initialization declaration or expression. */
7806 if (c_parser_next_token_starts_declspecs (parser
))
7810 = tree_cons (NULL
, c_begin_compound_stmt (true), for_block
);
7811 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7812 decl
= check_for_loop_decls ();
7815 if (DECL_INITIAL (decl
) == error_mark_node
)
7816 decl
= error_mark_node
;
7819 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7820 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7822 struct c_expr init_exp
;
7823 location_t init_loc
;
7825 decl
= c_parser_postfix_expression (parser
).value
;
7827 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7828 init_loc
= c_parser_peek_token (parser
)->location
;
7830 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
7831 init_exp
= default_function_array_conversion (init_exp
);
7832 init
= build_modify_expr (init_loc
,
7833 decl
, NOP_EXPR
, init_exp
.value
,
7834 init_exp
.original_type
);
7835 init
= c_process_expr_stmt (init
);
7837 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7842 c_parser_error (parser
,
7843 "expected iteration declaration or initialization");
7844 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7850 /* Parse the loop condition. */
7852 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7854 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
7855 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
);
7857 cond
= cond_expr
.value
;
7858 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
7859 cond
= c_fully_fold (cond
, false, NULL
);
7860 switch (cond_expr
.original_code
)
7868 /* Can't be cond = error_mark_node, because we want to preserve
7869 the location until c_finish_omp_for. */
7870 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
7873 protected_set_expr_location (cond
, cond_loc
);
7875 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7877 /* Parse the increment expression. */
7879 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7881 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
7883 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7884 protected_set_expr_location (incr
, incr_loc
);
7886 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7888 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
7892 TREE_VEC_ELT (declv
, i
) = decl
;
7893 TREE_VEC_ELT (initv
, i
) = init
;
7894 TREE_VEC_ELT (condv
, i
) = cond
;
7895 TREE_VEC_ELT (incrv
, i
) = incr
;
7899 if (i
== collapse
- 1)
7902 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7903 in between the collapsed for loops to be still considered perfectly
7904 nested. Hopefully the final version clarifies this.
7905 For now handle (multiple) {'s and empty statements. */
7908 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7910 c_parser_consume_token (parser
);
7913 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7915 c_parser_consume_token (parser
);
7919 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7920 c_parser_consume_token (parser
);
7923 c_parser_error (parser
, "not enough perfectly nested loops");
7926 open_brace_parsed
= true;
7936 nbraces
+= bracecount
;
7939 save_break
= c_break_label
;
7940 c_break_label
= size_one_node
;
7941 save_cont
= c_cont_label
;
7942 c_cont_label
= NULL_TREE
;
7943 body
= push_stmt_list ();
7945 if (open_brace_parsed
)
7947 stmt
= c_begin_compound_stmt (true);
7948 c_parser_compound_statement_nostart (parser
);
7949 add_stmt (c_end_compound_stmt (stmt
, true));
7952 add_stmt (c_parser_c99_block_statement (parser
));
7954 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7956 body
= pop_stmt_list (body
);
7957 c_break_label
= save_break
;
7958 c_cont_label
= save_cont
;
7962 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7964 c_parser_consume_token (parser
);
7967 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7968 c_parser_consume_token (parser
);
7971 c_parser_error (parser
, "collapsed loops not perfectly nested");
7974 stmt
= c_begin_compound_stmt (true);
7976 c_parser_compound_statement_nostart (parser
);
7977 body
= c_end_compound_stmt (stmt
, true);
7984 /* Only bother calling c_finish_omp_for if we haven't already generated
7985 an error from the initialization parsing. */
7988 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
7991 if (par_clauses
!= NULL
)
7994 for (c
= par_clauses
; *c
; )
7995 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
7996 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
7997 c
= &OMP_CLAUSE_CHAIN (*c
);
8000 for (i
= 0; i
< collapse
; i
++)
8001 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
8004 c
= &OMP_CLAUSE_CHAIN (*c
);
8005 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
8008 "iteration variable %qD should not be firstprivate",
8009 OMP_CLAUSE_DECL (*c
));
8010 *c
= OMP_CLAUSE_CHAIN (*c
);
8014 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
8015 change it to shared (decl) in
8016 OMP_PARALLEL_CLAUSES. */
8017 tree l
= build_omp_clause (OMP_CLAUSE_LASTPRIVATE
);
8018 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
8019 OMP_CLAUSE_CHAIN (l
) = clauses
;
8021 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
8025 OMP_FOR_CLAUSES (stmt
) = clauses
;
8032 stmt
= c_end_compound_stmt (TREE_VALUE (for_block
), true);
8034 for_block
= TREE_CHAIN (for_block
);
8040 #pragma omp for for-clause[optseq] new-line
8044 #define OMP_FOR_CLAUSE_MASK \
8045 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8046 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8047 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
8048 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8049 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
8050 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
8051 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
8052 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8055 c_parser_omp_for (c_parser
*parser
)
8057 tree block
, clauses
, ret
;
8059 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
8062 block
= c_begin_compound_stmt (true);
8063 ret
= c_parser_omp_for_loop (parser
, clauses
, NULL
);
8064 block
= c_end_compound_stmt (block
, true);
8071 # pragma omp master new-line
8076 c_parser_omp_master (c_parser
*parser
)
8078 c_parser_skip_to_pragma_eol (parser
);
8079 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
8083 # pragma omp ordered new-line
8088 c_parser_omp_ordered (c_parser
*parser
)
8090 c_parser_skip_to_pragma_eol (parser
);
8091 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
8097 { section-sequence }
8100 section-directive[opt] structured-block
8101 section-sequence section-directive structured-block */
8104 c_parser_omp_sections_scope (c_parser
*parser
)
8107 bool error_suppress
= false;
8110 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
8112 /* Avoid skipping until the end of the block. */
8113 parser
->error
= false;
8117 stmt
= push_stmt_list ();
8119 loc
= c_parser_peek_token (parser
)->location
;
8120 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
8122 substmt
= push_stmt_list ();
8126 c_parser_statement (parser
);
8128 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
8130 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
8132 if (c_parser_next_token_is (parser
, CPP_EOF
))
8136 substmt
= pop_stmt_list (substmt
);
8137 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
8138 SET_EXPR_LOCATION (substmt
, loc
);
8144 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
8146 if (c_parser_next_token_is (parser
, CPP_EOF
))
8149 loc
= c_parser_peek_token (parser
)->location
;
8150 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
8152 c_parser_consume_pragma (parser
);
8153 c_parser_skip_to_pragma_eol (parser
);
8154 error_suppress
= false;
8156 else if (!error_suppress
)
8158 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
8159 error_suppress
= true;
8162 substmt
= c_parser_omp_structured_block (parser
);
8163 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
8164 SET_EXPR_LOCATION (substmt
, loc
);
8167 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
8168 "expected %<#pragma omp section%> or %<}%>");
8170 substmt
= pop_stmt_list (stmt
);
8172 stmt
= make_node (OMP_SECTIONS
);
8173 TREE_TYPE (stmt
) = void_type_node
;
8174 OMP_SECTIONS_BODY (stmt
) = substmt
;
8176 return add_stmt (stmt
);
8180 # pragma omp sections sections-clause[optseq] newline
8184 #define OMP_SECTIONS_CLAUSE_MASK \
8185 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8186 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8187 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
8188 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8189 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8192 c_parser_omp_sections (c_parser
*parser
)
8194 tree block
, clauses
, ret
;
8196 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
8197 "#pragma omp sections");
8199 block
= c_begin_compound_stmt (true);
8200 ret
= c_parser_omp_sections_scope (parser
);
8202 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
8203 block
= c_end_compound_stmt (block
, true);
8210 # pragma parallel parallel-clause new-line
8211 # pragma parallel for parallel-for-clause new-line
8212 # pragma parallel sections parallel-sections-clause new-line
8215 #define OMP_PARALLEL_CLAUSE_MASK \
8216 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8217 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8218 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8219 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8220 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8221 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8222 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8223 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8226 c_parser_omp_parallel (c_parser
*parser
)
8228 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
8229 const char *p_name
= "#pragma omp parallel";
8230 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
8231 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
8233 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
8235 c_parser_consume_token (parser
);
8236 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
8237 p_name
= "#pragma omp parallel for";
8238 mask
|= OMP_FOR_CLAUSE_MASK
;
8239 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8241 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8243 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8244 if (strcmp (p
, "sections") == 0)
8246 c_parser_consume_token (parser
);
8247 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
8248 p_name
= "#pragma omp parallel sections";
8249 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
8250 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8254 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
8258 case PRAGMA_OMP_PARALLEL
:
8259 block
= c_begin_omp_parallel ();
8260 c_parser_statement (parser
);
8261 stmt
= c_finish_omp_parallel (clauses
, block
);
8264 case PRAGMA_OMP_PARALLEL_FOR
:
8265 block
= c_begin_omp_parallel ();
8266 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8267 c_parser_omp_for_loop (parser
, ws_clause
, &par_clause
);
8268 stmt
= c_finish_omp_parallel (par_clause
, block
);
8269 OMP_PARALLEL_COMBINED (stmt
) = 1;
8272 case PRAGMA_OMP_PARALLEL_SECTIONS
:
8273 block
= c_begin_omp_parallel ();
8274 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8275 stmt
= c_parser_omp_sections_scope (parser
);
8277 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
8278 stmt
= c_finish_omp_parallel (par_clause
, block
);
8279 OMP_PARALLEL_COMBINED (stmt
) = 1;
8290 # pragma omp single single-clause[optseq] new-line
8294 #define OMP_SINGLE_CLAUSE_MASK \
8295 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8296 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8297 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8298 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8301 c_parser_omp_single (c_parser
*parser
)
8303 tree stmt
= make_node (OMP_SINGLE
);
8304 TREE_TYPE (stmt
) = void_type_node
;
8306 OMP_SINGLE_CLAUSES (stmt
)
8307 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
8308 "#pragma omp single");
8309 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
8311 return add_stmt (stmt
);
8315 # pragma omp task task-clause[optseq] new-line
8318 #define OMP_TASK_CLAUSE_MASK \
8319 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8320 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8321 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8322 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8323 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8324 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8327 c_parser_omp_task (c_parser
*parser
)
8329 tree clauses
, block
;
8331 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
8332 "#pragma omp task");
8334 block
= c_begin_omp_task ();
8335 c_parser_statement (parser
);
8336 return c_finish_omp_task (clauses
, block
);
8340 # pragma omp taskwait new-line
8344 c_parser_omp_taskwait (c_parser
*parser
)
8346 c_parser_consume_pragma (parser
);
8347 c_parser_skip_to_pragma_eol (parser
);
8349 c_finish_omp_taskwait ();
8352 /* Main entry point to parsing most OpenMP pragmas. */
8355 c_parser_omp_construct (c_parser
*parser
)
8357 enum pragma_kind p_kind
;
8361 loc
= c_parser_peek_token (parser
)->location
;
8362 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
8363 c_parser_consume_pragma (parser
);
8365 /* For all constructs below except #pragma omp atomic
8366 MUST_NOT_THROW catch handlers are needed when exceptions
8368 if (p_kind
!= PRAGMA_OMP_ATOMIC
)
8369 c_maybe_initialize_eh ();
8373 case PRAGMA_OMP_ATOMIC
:
8374 c_parser_omp_atomic (parser
);
8376 case PRAGMA_OMP_CRITICAL
:
8377 stmt
= c_parser_omp_critical (parser
);
8379 case PRAGMA_OMP_FOR
:
8380 stmt
= c_parser_omp_for (parser
);
8382 case PRAGMA_OMP_MASTER
:
8383 stmt
= c_parser_omp_master (parser
);
8385 case PRAGMA_OMP_ORDERED
:
8386 stmt
= c_parser_omp_ordered (parser
);
8388 case PRAGMA_OMP_PARALLEL
:
8389 stmt
= c_parser_omp_parallel (parser
);
8391 case PRAGMA_OMP_SECTIONS
:
8392 stmt
= c_parser_omp_sections (parser
);
8394 case PRAGMA_OMP_SINGLE
:
8395 stmt
= c_parser_omp_single (parser
);
8397 case PRAGMA_OMP_TASK
:
8398 stmt
= c_parser_omp_task (parser
);
8405 SET_EXPR_LOCATION (stmt
, loc
);
8410 # pragma omp threadprivate (variable-list) */
8413 c_parser_omp_threadprivate (c_parser
*parser
)
8417 c_parser_consume_pragma (parser
);
8418 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
8420 /* Mark every variable in VARS to be assigned thread local storage. */
8421 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
8423 tree v
= TREE_PURPOSE (t
);
8425 /* If V had already been marked threadprivate, it doesn't matter
8426 whether it had been used prior to this point. */
8427 if (TREE_CODE (v
) != VAR_DECL
)
8428 error ("%qD is not a variable", v
);
8429 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
8430 error ("%qE declared %<threadprivate%> after first use", v
);
8431 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
8432 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
8433 else if (TREE_TYPE (v
) == error_mark_node
)
8435 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
8436 error ("%<threadprivate%> %qE has incomplete type", v
);
8439 if (! DECL_THREAD_LOCAL_P (v
))
8441 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
8442 /* If rtl has been already set for this var, call
8443 make_decl_rtl once again, so that encode_section_info
8444 has a chance to look at the new decl flags. */
8445 if (DECL_RTL_SET_P (v
))
8448 C_DECL_THREADPRIVATE_P (v
) = 1;
8452 c_parser_skip_to_pragma_eol (parser
);
8456 /* Parse a single source file. */
8461 /* Use local storage to begin. If the first token is a pragma, parse it.
8462 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8463 which will cause garbage collection. */
8466 memset (&tparser
, 0, sizeof tparser
);
8467 the_parser
= &tparser
;
8469 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
8470 c_parser_pragma_pch_preprocess (&tparser
);
8472 the_parser
= GGC_NEW (c_parser
);
8473 *the_parser
= tparser
;
8475 c_parser_translation_unit (the_parser
);
8479 #include "gt-c-parser.h"