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"
62 /* Initialization routine for this file. */
67 /* The only initialization required is of the reserved word
78 mask
|= D_ASM
| D_EXT
;
82 if (!c_dialect_objc ())
83 mask
|= D_OBJC
| D_CXX_OBJC
;
85 ridpointers
= GGC_CNEWVEC (tree
, (int) RID_MAX
);
86 for (i
= 0; i
< num_c_common_reswords
; i
++)
88 /* If a keyword is disabled, do not enter it into the table
89 and so create a canonical spelling that isn't a keyword. */
90 if (c_common_reswords
[i
].disable
& mask
)
93 && (c_common_reswords
[i
].disable
& D_CXXWARN
))
95 id
= get_identifier (c_common_reswords
[i
].word
);
96 C_SET_RID_CODE (id
, RID_CXX_COMPAT_WARN
);
97 C_IS_RESERVED_WORD (id
) = 1;
102 id
= get_identifier (c_common_reswords
[i
].word
);
103 C_SET_RID_CODE (id
, c_common_reswords
[i
].rid
);
104 C_IS_RESERVED_WORD (id
) = 1;
105 ridpointers
[(int) c_common_reswords
[i
].rid
] = id
;
109 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
110 and the C parser. Unlike the C++ lexer, the parser structure
111 stores the lexer information instead of using a separate structure.
112 Identifiers are separated into ordinary identifiers, type names,
113 keywords and some other Objective-C types of identifiers, and some
114 look-ahead is maintained.
116 ??? It might be a good idea to lex the whole file up front (as for
117 C++). It would then be possible to share more of the C and C++
118 lexer code, if desired. */
120 /* The following local token type is used. */
123 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
125 /* More information about the type of a CPP_NAME token. */
126 typedef enum c_id_kind
{
127 /* An ordinary identifier. */
129 /* An identifier declared as a typedef name. */
131 /* An identifier declared as an Objective-C class name. */
133 /* Not an identifier. */
137 /* A single C token after string literal concatenation and conversion
138 of preprocessing tokens to tokens. */
139 typedef struct c_token
GTY (())
141 /* The kind of token. */
142 ENUM_BITFIELD (cpp_ttype
) type
: 8;
143 /* If this token is a CPP_NAME, this value indicates whether also
144 declared as some kind of type. Otherwise, it is C_ID_NONE. */
145 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
146 /* If this token is a keyword, this value indicates which keyword.
147 Otherwise, this value is RID_MAX. */
148 ENUM_BITFIELD (rid
) keyword
: 8;
149 /* If this token is a CPP_PRAGMA, this indicates the pragma that
150 was seen. Otherwise it is PRAGMA_NONE. */
151 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 8;
152 /* The value associated with this token, if any. */
154 /* The location at which this token was found. */
158 /* A parser structure recording information about the state and
159 context of parsing. Includes lexer information with up to two
160 tokens of look-ahead; more are not needed for C. */
161 typedef struct c_parser
GTY(())
163 /* The look-ahead tokens. */
165 /* How many look-ahead tokens are available (0, 1 or 2). */
167 /* True if a syntax error is being recovered from; false otherwise.
168 c_parser_error sets this flag. It should clear this flag when
169 enough tokens have been consumed to recover from the error. */
170 BOOL_BITFIELD error
: 1;
171 /* True if we're processing a pragma, and shouldn't automatically
172 consume CPP_PRAGMA_EOL. */
173 BOOL_BITFIELD in_pragma
: 1;
174 /* True if we're parsing the outermost block of an if statement. */
175 BOOL_BITFIELD in_if_block
: 1;
176 /* True if we want to lex an untranslated string. */
177 BOOL_BITFIELD lex_untranslated_string
: 1;
178 /* Objective-C specific parser/lexer information. */
179 BOOL_BITFIELD objc_pq_context
: 1;
180 /* The following flag is needed to contextualize Objective-C lexical
181 analysis. In some cases (e.g., 'int NSObject;'), it is
182 undesirable to bind an identifier to an Objective-C class, even
183 if a class with that name exists. */
184 BOOL_BITFIELD objc_need_raw_identifier
: 1;
188 /* The actual parser and external interface. ??? Does this need to be
189 garbage-collected? */
191 static GTY (()) c_parser
*the_parser
;
194 /* Read in and lex a single token, storing it in *TOKEN. */
197 c_lex_one_token (c_parser
*parser
, c_token
*token
)
199 timevar_push (TV_LEX
);
201 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
,
202 (parser
->lex_untranslated_string
203 ? C_LEX_STRING_NO_TRANSLATE
: 0));
204 token
->id_kind
= C_ID_NONE
;
205 token
->keyword
= RID_MAX
;
206 token
->pragma_kind
= PRAGMA_NONE
;
214 bool objc_force_identifier
= parser
->objc_need_raw_identifier
;
215 if (c_dialect_objc ())
216 parser
->objc_need_raw_identifier
= false;
218 if (C_IS_RESERVED_WORD (token
->value
))
220 enum rid rid_code
= C_RID_CODE (token
->value
);
222 if (rid_code
== RID_CXX_COMPAT_WARN
)
224 warning_at (token
->location
,
226 "identifier %qs conflicts with C++ keyword",
227 IDENTIFIER_POINTER (token
->value
));
229 else if (c_dialect_objc ())
231 if (!objc_is_reserved_word (token
->value
)
232 && (!OBJC_IS_PQ_KEYWORD (rid_code
)
233 || parser
->objc_pq_context
))
235 /* Return the canonical spelling for this keyword. */
236 token
->value
= ridpointers
[(int) rid_code
];
237 token
->type
= CPP_KEYWORD
;
238 token
->keyword
= rid_code
;
244 token
->type
= CPP_KEYWORD
;
245 token
->keyword
= rid_code
;
250 decl
= lookup_name (token
->value
);
253 if (TREE_CODE (decl
) == TYPE_DECL
)
255 token
->id_kind
= C_ID_TYPENAME
;
259 else if (c_dialect_objc ())
261 tree objc_interface_decl
= objc_is_class_name (token
->value
);
262 /* Objective-C class names are in the same namespace as
263 variables and typedefs, and hence are shadowed by local
265 if (objc_interface_decl
266 && (global_bindings_p ()
267 || (!objc_force_identifier
&& !decl
)))
269 token
->value
= objc_interface_decl
;
270 token
->id_kind
= C_ID_CLASSNAME
;
274 token
->id_kind
= C_ID_ID
;
278 /* This only happens in Objective-C; it must be a keyword. */
279 token
->type
= CPP_KEYWORD
;
280 token
->keyword
= C_RID_CODE (token
->value
);
284 case CPP_CLOSE_PAREN
:
286 /* These tokens may affect the interpretation of any identifiers
287 following, if doing Objective-C. */
288 if (c_dialect_objc ())
289 parser
->objc_need_raw_identifier
= false;
292 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
293 token
->pragma_kind
= (enum pragma_kind
) TREE_INT_CST_LOW (token
->value
);
299 timevar_pop (TV_LEX
);
302 /* Return a pointer to the next token from PARSER, reading it in if
305 static inline c_token
*
306 c_parser_peek_token (c_parser
*parser
)
308 if (parser
->tokens_avail
== 0)
310 c_lex_one_token (parser
, &parser
->tokens
[0]);
311 parser
->tokens_avail
= 1;
313 return &parser
->tokens
[0];
316 /* Return true if the next token from PARSER has the indicated
320 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
322 return c_parser_peek_token (parser
)->type
== type
;
325 /* Return true if the next token from PARSER does not have the
329 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
331 return !c_parser_next_token_is (parser
, type
);
334 /* Return true if the next token from PARSER is the indicated
338 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
340 return c_parser_peek_token (parser
)->keyword
== keyword
;
343 /* Return true if TOKEN can start a type name,
346 c_token_starts_typename (c_token
*token
)
351 switch (token
->id_kind
)
358 gcc_assert (c_dialect_objc ());
364 switch (token
->keyword
)
396 if (c_dialect_objc ())
404 /* Return true if the next token from PARSER can start a type name,
407 c_parser_next_token_starts_typename (c_parser
*parser
)
409 c_token
*token
= c_parser_peek_token (parser
);
410 return c_token_starts_typename (token
);
413 /* Return true if TOKEN can start declaration specifiers, false
416 c_token_starts_declspecs (c_token
*token
)
421 switch (token
->id_kind
)
428 gcc_assert (c_dialect_objc ());
434 switch (token
->keyword
)
473 if (c_dialect_objc ())
481 /* Return true if the next token from PARSER can start declaration
482 specifiers, false otherwise. */
484 c_parser_next_token_starts_declspecs (c_parser
*parser
)
486 c_token
*token
= c_parser_peek_token (parser
);
487 return c_token_starts_declspecs (token
);
490 /* Return a pointer to the next-but-one token from PARSER, reading it
491 in if necessary. The next token is already read in. */
494 c_parser_peek_2nd_token (c_parser
*parser
)
496 if (parser
->tokens_avail
>= 2)
497 return &parser
->tokens
[1];
498 gcc_assert (parser
->tokens_avail
== 1);
499 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
500 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
501 c_lex_one_token (parser
, &parser
->tokens
[1]);
502 parser
->tokens_avail
= 2;
503 return &parser
->tokens
[1];
506 /* Consume the next token from PARSER. */
509 c_parser_consume_token (c_parser
*parser
)
511 gcc_assert (parser
->tokens_avail
>= 1);
512 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
513 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
514 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
515 if (parser
->tokens_avail
== 2)
516 parser
->tokens
[0] = parser
->tokens
[1];
517 parser
->tokens_avail
--;
520 /* Expect the current token to be a #pragma. Consume it and remember
521 that we've begun parsing a pragma. */
524 c_parser_consume_pragma (c_parser
*parser
)
526 gcc_assert (!parser
->in_pragma
);
527 gcc_assert (parser
->tokens_avail
>= 1);
528 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
529 if (parser
->tokens_avail
== 2)
530 parser
->tokens
[0] = parser
->tokens
[1];
531 parser
->tokens_avail
--;
532 parser
->in_pragma
= true;
535 /* Update the globals input_location and in_system_header from
538 c_parser_set_source_position_from_token (c_token
*token
)
540 if (token
->type
!= CPP_EOF
)
542 input_location
= token
->location
;
546 /* Issue a diagnostic of the form
547 FILE:LINE: MESSAGE before TOKEN
548 where TOKEN is the next token in the input stream of PARSER.
549 MESSAGE (specified by the caller) is usually of the form "expected
552 Do not issue a diagnostic if still recovering from an error.
554 ??? This is taken from the C++ parser, but building up messages in
555 this way is not i18n-friendly and some other approach should be
559 c_parser_error (c_parser
*parser
, const char *gmsgid
)
561 c_token
*token
= c_parser_peek_token (parser
);
564 parser
->error
= true;
567 /* This diagnostic makes more sense if it is tagged to the line of
568 the token we just peeked at. */
569 c_parser_set_source_position_from_token (token
);
570 c_parse_error (gmsgid
,
571 /* Because c_parse_error does not understand
572 CPP_KEYWORD, keywords are treated like
574 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
578 /* If the next token is of the indicated TYPE, consume it. Otherwise,
579 issue the error MSGID. If MSGID is NULL then a message has already
580 been produced and no message will be produced this time. Returns
581 true if found, false otherwise. */
584 c_parser_require (c_parser
*parser
,
588 if (c_parser_next_token_is (parser
, type
))
590 c_parser_consume_token (parser
);
595 c_parser_error (parser
, msgid
);
600 /* If the next token is the indicated keyword, consume it. Otherwise,
601 issue the error MSGID. Returns true if found, false otherwise. */
604 c_parser_require_keyword (c_parser
*parser
,
608 if (c_parser_next_token_is_keyword (parser
, keyword
))
610 c_parser_consume_token (parser
);
615 c_parser_error (parser
, msgid
);
620 /* Like c_parser_require, except that tokens will be skipped until the
621 desired token is found. An error message is still produced if the
622 next token is not as expected. If MSGID is NULL then a message has
623 already been produced and no message will be produced this
627 c_parser_skip_until_found (c_parser
*parser
,
631 unsigned nesting_depth
= 0;
633 if (c_parser_require (parser
, type
, msgid
))
636 /* Skip tokens until the desired token is found. */
639 /* Peek at the next token. */
640 c_token
*token
= c_parser_peek_token (parser
);
641 /* If we've reached the token we want, consume it and stop. */
642 if (token
->type
== type
&& !nesting_depth
)
644 c_parser_consume_token (parser
);
648 /* If we've run out of tokens, stop. */
649 if (token
->type
== CPP_EOF
)
651 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
653 if (token
->type
== CPP_OPEN_BRACE
654 || token
->type
== CPP_OPEN_PAREN
655 || token
->type
== CPP_OPEN_SQUARE
)
657 else if (token
->type
== CPP_CLOSE_BRACE
658 || token
->type
== CPP_CLOSE_PAREN
659 || token
->type
== CPP_CLOSE_SQUARE
)
661 if (nesting_depth
-- == 0)
664 /* Consume this token. */
665 c_parser_consume_token (parser
);
667 parser
->error
= false;
670 /* Skip tokens until the end of a parameter is found, but do not
671 consume the comma, semicolon or closing delimiter. */
674 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
676 unsigned nesting_depth
= 0;
680 c_token
*token
= c_parser_peek_token (parser
);
681 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
684 /* If we've run out of tokens, stop. */
685 if (token
->type
== CPP_EOF
)
687 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
689 if (token
->type
== CPP_OPEN_BRACE
690 || token
->type
== CPP_OPEN_PAREN
691 || token
->type
== CPP_OPEN_SQUARE
)
693 else if (token
->type
== CPP_CLOSE_BRACE
694 || token
->type
== CPP_CLOSE_PAREN
695 || token
->type
== CPP_CLOSE_SQUARE
)
697 if (nesting_depth
-- == 0)
700 /* Consume this token. */
701 c_parser_consume_token (parser
);
703 parser
->error
= false;
706 /* Expect to be at the end of the pragma directive and consume an
707 end of line marker. */
710 c_parser_skip_to_pragma_eol (c_parser
*parser
)
712 gcc_assert (parser
->in_pragma
);
713 parser
->in_pragma
= false;
715 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
718 c_token
*token
= c_parser_peek_token (parser
);
719 if (token
->type
== CPP_EOF
)
721 if (token
->type
== CPP_PRAGMA_EOL
)
723 c_parser_consume_token (parser
);
726 c_parser_consume_token (parser
);
729 parser
->error
= false;
732 /* Skip tokens until we have consumed an entire block, or until we
733 have consumed a non-nested ';'. */
736 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
738 unsigned nesting_depth
= 0;
739 bool save_error
= parser
->error
;
745 /* Peek at the next token. */
746 token
= c_parser_peek_token (parser
);
754 if (parser
->in_pragma
)
759 /* If the next token is a ';', we have reached the
760 end of the statement. */
763 /* Consume the ';'. */
764 c_parser_consume_token (parser
);
769 case CPP_CLOSE_BRACE
:
770 /* If the next token is a non-nested '}', then we have
771 reached the end of the current block. */
772 if (nesting_depth
== 0 || --nesting_depth
== 0)
774 c_parser_consume_token (parser
);
780 /* If it the next token is a '{', then we are entering a new
781 block. Consume the entire block. */
786 /* If we see a pragma, consume the whole thing at once. We
787 have some safeguards against consuming pragmas willy-nilly.
788 Normally, we'd expect to be here with parser->error set,
789 which disables these safeguards. But it's possible to get
790 here for secondary error recovery, after parser->error has
792 c_parser_consume_pragma (parser
);
793 c_parser_skip_to_pragma_eol (parser
);
794 parser
->error
= save_error
;
801 c_parser_consume_token (parser
);
805 parser
->error
= false;
808 /* CPP's options (initialized by c-opts.c). */
809 extern cpp_options
*cpp_opts
;
811 /* Save the warning flags which are controlled by __extension__. */
814 disable_extension_diagnostics (void)
817 | (warn_pointer_arith
<< 1)
818 | (warn_traditional
<< 2)
820 | (warn_long_long
<< 4)
821 | (cpp_opts
->warn_long_long
<< 5));
822 cpp_opts
->pedantic
= pedantic
= 0;
823 warn_pointer_arith
= 0;
824 cpp_opts
->warn_traditional
= warn_traditional
= 0;
827 cpp_opts
->warn_long_long
= 0;
831 /* Restore the warning flags which are controlled by __extension__.
832 FLAGS is the return value from disable_extension_diagnostics. */
835 restore_extension_diagnostics (int flags
)
837 cpp_opts
->pedantic
= pedantic
= flags
& 1;
838 warn_pointer_arith
= (flags
>> 1) & 1;
839 cpp_opts
->warn_traditional
= warn_traditional
= (flags
>> 2) & 1;
840 flag_iso
= (flags
>> 3) & 1;
841 warn_long_long
= (flags
>> 4) & 1;
842 cpp_opts
->warn_long_long
= (flags
>> 5) & 1;
845 /* Possibly kinds of declarator to parse. */
846 typedef enum c_dtr_syn
{
847 /* A normal declarator with an identifier. */
849 /* An abstract declarator (maybe empty). */
851 /* A parameter declarator: may be either, but after a type name does
852 not redeclare a typedef name as an identifier if it can
853 alternatively be interpreted as a typedef name; see DR#009,
854 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
855 following DR#249. For example, given a typedef T, "int T" and
856 "int *T" are valid parameter declarations redeclaring T, while
857 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
858 abstract declarators rather than involving redundant parentheses;
859 the same applies with attributes inside the parentheses before
864 static void c_parser_external_declaration (c_parser
*);
865 static void c_parser_asm_definition (c_parser
*);
866 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool, bool);
867 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
869 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
870 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
871 static tree
c_parser_struct_declaration (c_parser
*);
872 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
873 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
875 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
877 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
879 struct c_declarator
*);
880 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
881 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
882 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
883 static tree
c_parser_simple_asm_expr (c_parser
*);
884 static tree
c_parser_attributes (c_parser
*);
885 static struct c_type_name
*c_parser_type_name (c_parser
*);
886 static struct c_expr
c_parser_initializer (c_parser
*);
887 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
888 static void c_parser_initelt (c_parser
*);
889 static void c_parser_initval (c_parser
*, struct c_expr
*);
890 static tree
c_parser_compound_statement (c_parser
*);
891 static void c_parser_compound_statement_nostart (c_parser
*);
892 static void c_parser_label (c_parser
*);
893 static void c_parser_statement (c_parser
*);
894 static void c_parser_statement_after_labels (c_parser
*);
895 static void c_parser_if_statement (c_parser
*);
896 static void c_parser_switch_statement (c_parser
*);
897 static void c_parser_while_statement (c_parser
*);
898 static void c_parser_do_statement (c_parser
*);
899 static void c_parser_for_statement (c_parser
*);
900 static tree
c_parser_asm_statement (c_parser
*);
901 static tree
c_parser_asm_operands (c_parser
*, bool);
902 static tree
c_parser_asm_clobbers (c_parser
*);
903 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
904 static struct c_expr
c_parser_conditional_expression (c_parser
*,
906 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
907 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
908 static struct c_expr
c_parser_unary_expression (c_parser
*);
909 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
910 static struct c_expr
c_parser_alignof_expression (c_parser
*);
911 static struct c_expr
c_parser_postfix_expression (c_parser
*);
912 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
913 struct c_type_name
*);
914 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
916 static struct c_expr
c_parser_expression (c_parser
*);
917 static struct c_expr
c_parser_expression_conv (c_parser
*);
918 static tree
c_parser_expr_list (c_parser
*, bool, bool);
919 static void c_parser_omp_construct (c_parser
*);
920 static void c_parser_omp_threadprivate (c_parser
*);
921 static void c_parser_omp_barrier (c_parser
*);
922 static void c_parser_omp_flush (c_parser
*);
923 static void c_parser_omp_taskwait (c_parser
*);
925 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
926 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
928 /* These Objective-C parser functions are only ever called when
929 compiling Objective-C. */
930 static void c_parser_objc_class_definition (c_parser
*);
931 static void c_parser_objc_class_instance_variables (c_parser
*);
932 static void c_parser_objc_class_declaration (c_parser
*);
933 static void c_parser_objc_alias_declaration (c_parser
*);
934 static void c_parser_objc_protocol_definition (c_parser
*);
935 static enum tree_code
c_parser_objc_method_type (c_parser
*);
936 static void c_parser_objc_method_definition (c_parser
*);
937 static void c_parser_objc_methodprotolist (c_parser
*);
938 static void c_parser_objc_methodproto (c_parser
*);
939 static tree
c_parser_objc_method_decl (c_parser
*);
940 static tree
c_parser_objc_type_name (c_parser
*);
941 static tree
c_parser_objc_protocol_refs (c_parser
*);
942 static void c_parser_objc_try_catch_statement (c_parser
*);
943 static void c_parser_objc_synchronized_statement (c_parser
*);
944 static tree
c_parser_objc_selector (c_parser
*);
945 static tree
c_parser_objc_selector_arg (c_parser
*);
946 static tree
c_parser_objc_receiver (c_parser
*);
947 static tree
c_parser_objc_message_args (c_parser
*);
948 static tree
c_parser_objc_keywordexpr (c_parser
*);
950 /* Parse a translation unit (C90 6.7, C99 6.9).
953 external-declarations
955 external-declarations:
957 external-declarations external-declaration
966 c_parser_translation_unit (c_parser
*parser
)
968 if (c_parser_next_token_is (parser
, CPP_EOF
))
970 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
971 "ISO C forbids an empty translation unit");
975 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
979 c_parser_external_declaration (parser
);
980 obstack_free (&parser_obstack
, obstack_position
);
982 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
986 /* Parse an external declaration (C90 6.7, C99 6.9).
988 external-declaration:
994 external-declaration:
997 __extension__ external-declaration
1001 external-declaration:
1002 objc-class-definition
1003 objc-class-declaration
1004 objc-alias-declaration
1005 objc-protocol-definition
1006 objc-method-definition
1011 c_parser_external_declaration (c_parser
*parser
)
1014 switch (c_parser_peek_token (parser
)->type
)
1017 switch (c_parser_peek_token (parser
)->keyword
)
1020 ext
= disable_extension_diagnostics ();
1021 c_parser_consume_token (parser
);
1022 c_parser_external_declaration (parser
);
1023 restore_extension_diagnostics (ext
);
1026 c_parser_asm_definition (parser
);
1028 case RID_AT_INTERFACE
:
1029 case RID_AT_IMPLEMENTATION
:
1030 gcc_assert (c_dialect_objc ());
1031 c_parser_objc_class_definition (parser
);
1034 gcc_assert (c_dialect_objc ());
1035 c_parser_objc_class_declaration (parser
);
1038 gcc_assert (c_dialect_objc ());
1039 c_parser_objc_alias_declaration (parser
);
1041 case RID_AT_PROTOCOL
:
1042 gcc_assert (c_dialect_objc ());
1043 c_parser_objc_protocol_definition (parser
);
1046 gcc_assert (c_dialect_objc ());
1047 c_parser_consume_token (parser
);
1048 objc_finish_implementation ();
1055 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1056 "ISO C does not allow extra %<;%> outside of a function");
1057 c_parser_consume_token (parser
);
1060 c_parser_pragma (parser
, pragma_external
);
1064 if (c_dialect_objc ())
1066 c_parser_objc_method_definition (parser
);
1069 /* Else fall through, and yield a syntax error trying to parse
1070 as a declaration or function definition. */
1073 /* A declaration or a function definition. We can only tell
1074 which after parsing the declaration specifiers, if any, and
1075 the first declarator. */
1076 c_parser_declaration_or_fndef (parser
, true, true, false, true);
1082 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1083 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1084 accepted; otherwise (old-style parameter declarations) only other
1085 declarations are accepted. If NESTED is true, we are inside a
1086 function or parsing old-style parameter declarations; any functions
1087 encountered are nested functions and declaration specifiers are
1088 required; otherwise we are at top level and functions are normal
1089 functions and declaration specifiers may be optional. If EMPTY_OK
1090 is true, empty declarations are OK (subject to all other
1091 constraints); otherwise (old-style parameter declarations) they are
1092 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1093 may start with attributes; otherwise they may not.
1096 declaration-specifiers init-declarator-list[opt] ;
1098 function-definition:
1099 declaration-specifiers[opt] declarator declaration-list[opt]
1104 declaration-list declaration
1106 init-declarator-list:
1108 init-declarator-list , init-declarator
1111 declarator simple-asm-expr[opt] attributes[opt]
1112 declarator simple-asm-expr[opt] attributes[opt] = initializer
1116 nested-function-definition:
1117 declaration-specifiers declarator declaration-list[opt]
1120 The simple-asm-expr and attributes are GNU extensions.
1122 This function does not handle __extension__; that is handled in its
1123 callers. ??? Following the old parser, __extension__ may start
1124 external declarations, declarations in functions and declarations
1125 at the start of "for" loops, but not old-style parameter
1128 C99 requires declaration specifiers in a function definition; the
1129 absence is diagnosed through the diagnosis of implicit int. In GNU
1130 C we also allow but diagnose declarations without declaration
1131 specifiers, but only at top level (elsewhere they conflict with
1137 threadprivate-directive */
1140 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
, bool empty_ok
,
1141 bool nested
, bool start_attr_ok
)
1143 struct c_declspecs
*specs
;
1145 tree all_prefix_attrs
;
1146 bool diagnosed_no_specs
= false;
1147 location_t here
= c_parser_peek_token (parser
)->location
;
1149 specs
= build_null_declspecs ();
1150 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
);
1153 c_parser_skip_to_end_of_block_or_statement (parser
);
1156 if (nested
&& !specs
->declspecs_seen_p
)
1158 c_parser_error (parser
, "expected declaration specifiers");
1159 c_parser_skip_to_end_of_block_or_statement (parser
);
1162 finish_declspecs (specs
);
1163 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1169 shadow_tag_warned (specs
, 1);
1170 pedwarn (here
, 0, "empty declaration");
1172 c_parser_consume_token (parser
);
1175 pending_xref_error ();
1176 prefix_attrs
= specs
->attrs
;
1177 all_prefix_attrs
= prefix_attrs
;
1178 specs
->attrs
= NULL_TREE
;
1181 struct c_declarator
*declarator
;
1184 /* Declaring either one or more declarators (in which case we
1185 should diagnose if there were no declaration specifiers) or a
1186 function definition (in which case the diagnostic for
1187 implicit int suffices). */
1188 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1189 C_DTR_NORMAL
, &dummy
);
1190 if (declarator
== NULL
)
1192 c_parser_skip_to_end_of_block_or_statement (parser
);
1195 if (c_parser_next_token_is (parser
, CPP_EQ
)
1196 || c_parser_next_token_is (parser
, CPP_COMMA
)
1197 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1198 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1199 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1201 tree asm_name
= NULL_TREE
;
1202 tree postfix_attrs
= NULL_TREE
;
1203 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1205 diagnosed_no_specs
= true;
1206 pedwarn (here
, 0, "data definition has no type or storage class");
1208 /* Having seen a data definition, there cannot now be a
1209 function definition. */
1211 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1212 asm_name
= c_parser_simple_asm_expr (parser
);
1213 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1214 postfix_attrs
= c_parser_attributes (parser
);
1215 if (c_parser_next_token_is (parser
, CPP_EQ
))
1219 c_parser_consume_token (parser
);
1220 /* The declaration of the variable is in effect while
1221 its initializer is parsed. */
1222 d
= start_decl (declarator
, specs
, true,
1223 chainon (postfix_attrs
, all_prefix_attrs
));
1225 d
= error_mark_node
;
1226 start_init (d
, asm_name
, global_bindings_p ());
1227 init
= c_parser_initializer (parser
);
1229 if (d
!= error_mark_node
)
1231 maybe_warn_string_init (TREE_TYPE (d
), init
);
1232 finish_decl (d
, init
.value
, asm_name
);
1237 tree d
= start_decl (declarator
, specs
, false,
1238 chainon (postfix_attrs
,
1241 finish_decl (d
, NULL_TREE
, asm_name
);
1243 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1245 c_parser_consume_token (parser
);
1246 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1247 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1250 all_prefix_attrs
= prefix_attrs
;
1253 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1255 c_parser_consume_token (parser
);
1260 c_parser_error (parser
, "expected %<,%> or %<;%>");
1261 c_parser_skip_to_end_of_block_or_statement (parser
);
1267 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1268 "%<asm%> or %<__attribute__%>");
1269 c_parser_skip_to_end_of_block_or_statement (parser
);
1272 /* Function definition (nested or otherwise). */
1275 pedwarn (here
, OPT_pedantic
, "ISO C forbids nested functions");
1276 c_push_function_context ();
1278 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1280 /* This can appear in many cases looking nothing like a
1281 function definition, so we don't give a more specific
1282 error suggesting there was one. */
1283 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1284 "or %<__attribute__%>");
1286 c_pop_function_context ();
1289 /* Parse old-style parameter declarations. ??? Attributes are
1290 not allowed to start declaration specifiers here because of a
1291 syntax conflict between a function declaration with attribute
1292 suffix and a function definition with an attribute prefix on
1293 first old-style parameter declaration. Following the old
1294 parser, they are not accepted on subsequent old-style
1295 parameter declarations either. However, there is no
1296 ambiguity after the first declaration, nor indeed on the
1297 first as long as we don't allow postfix attributes after a
1298 declarator with a nonempty identifier list in a definition;
1299 and postfix attributes have never been accepted here in
1300 function definitions either. */
1301 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1302 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1303 c_parser_declaration_or_fndef (parser
, false, false, true, false);
1304 store_parm_decls ();
1305 DECL_STRUCT_FUNCTION (current_function_decl
)->function_start_locus
1306 = c_parser_peek_token (parser
)->location
;
1307 fnbody
= c_parser_compound_statement (parser
);
1310 tree decl
= current_function_decl
;
1313 c_pop_function_context ();
1314 add_stmt (build_stmt (DECL_EXPR
, decl
));
1325 /* Parse an asm-definition (asm() outside a function body). This is a
1333 c_parser_asm_definition (c_parser
*parser
)
1335 tree asm_str
= c_parser_simple_asm_expr (parser
);
1337 cgraph_add_asm_node (asm_str
);
1338 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1341 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1342 6.7), adding them to SPECS (which may already include some).
1343 Storage class specifiers are accepted iff SCSPEC_OK; type
1344 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1345 the start iff START_ATTR_OK.
1347 declaration-specifiers:
1348 storage-class-specifier declaration-specifiers[opt]
1349 type-specifier declaration-specifiers[opt]
1350 type-qualifier declaration-specifiers[opt]
1351 function-specifier declaration-specifiers[opt]
1353 Function specifiers (inline) are from C99, and are currently
1354 handled as storage class specifiers, as is __thread.
1356 C90 6.5.1, C99 6.7.1:
1357 storage-class-specifier:
1368 C90 6.5.2, C99 6.7.2:
1381 [_Imaginary removed in C99 TC2]
1382 struct-or-union-specifier
1386 (_Bool and _Complex are new in C99.)
1388 C90 6.5.3, C99 6.7.3:
1395 (restrict is new in C99.)
1399 declaration-specifiers:
1400 attributes declaration-specifiers[opt]
1402 storage-class-specifier:
1414 (_Fract, _Accum, and _Sat are new from ISO/IEC DTR 18037:
1415 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf)
1420 class-name objc-protocol-refs[opt]
1421 typedef-name objc-protocol-refs
1426 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1427 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
)
1429 bool attrs_ok
= start_attr_ok
;
1430 bool seen_type
= specs
->type_seen_p
;
1431 while (c_parser_next_token_is (parser
, CPP_NAME
)
1432 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1433 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1435 struct c_typespec t
;
1437 if (c_parser_next_token_is (parser
, CPP_NAME
))
1439 tree value
= c_parser_peek_token (parser
)->value
;
1440 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1441 /* This finishes the specifiers unless a type name is OK, it
1442 is declared as a type name and a type name hasn't yet
1444 if (!typespec_ok
|| seen_type
1445 || (kind
!= C_ID_TYPENAME
&& kind
!= C_ID_CLASSNAME
))
1447 c_parser_consume_token (parser
);
1450 if (kind
== C_ID_TYPENAME
1451 && (!c_dialect_objc ()
1452 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
1454 t
.kind
= ctsk_typedef
;
1455 /* For a typedef name, record the meaning, not the name.
1456 In case of 'foo foo, bar;'. */
1457 t
.spec
= lookup_name (value
);
1459 t
.expr_const_operands
= true;
1463 tree proto
= NULL_TREE
;
1464 gcc_assert (c_dialect_objc ());
1466 if (c_parser_next_token_is (parser
, CPP_LESS
))
1467 proto
= c_parser_objc_protocol_refs (parser
);
1468 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1470 t
.expr_const_operands
= true;
1472 declspecs_add_type (specs
, t
);
1475 if (c_parser_next_token_is (parser
, CPP_LESS
))
1477 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1478 nisse@lysator.liu.se. */
1480 gcc_assert (c_dialect_objc ());
1481 if (!typespec_ok
|| seen_type
)
1483 proto
= c_parser_objc_protocol_refs (parser
);
1485 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1487 t
.expr_const_operands
= true;
1488 declspecs_add_type (specs
, t
);
1491 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1492 switch (c_parser_peek_token (parser
)->keyword
)
1504 /* TODO: Distinguish between function specifiers (inline)
1505 and storage class specifiers, either here or in
1506 declspecs_add_scspec. */
1507 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1508 c_parser_consume_token (parser
);
1531 if (c_dialect_objc ())
1532 parser
->objc_need_raw_identifier
= true;
1533 t
.kind
= ctsk_resword
;
1534 t
.spec
= c_parser_peek_token (parser
)->value
;
1536 t
.expr_const_operands
= true;
1537 declspecs_add_type (specs
, t
);
1538 c_parser_consume_token (parser
);
1545 t
= c_parser_enum_specifier (parser
);
1546 declspecs_add_type (specs
, t
);
1554 t
= c_parser_struct_or_union_specifier (parser
);
1555 declspecs_add_type (specs
, t
);
1558 /* ??? The old parser rejected typeof after other type
1559 specifiers, but is a syntax error the best way of
1561 if (!typespec_ok
|| seen_type
)
1565 t
= c_parser_typeof_specifier (parser
);
1566 declspecs_add_type (specs
, t
);
1572 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1573 c_parser_consume_token (parser
);
1578 attrs
= c_parser_attributes (parser
);
1579 declspecs_add_attrs (specs
, attrs
);
1588 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1591 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1592 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1593 enum attributes[opt] identifier
1595 The form with trailing comma is new in C99. The forms with
1596 attributes are GNU extensions. In GNU C, we accept any expression
1597 without commas in the syntax (assignment expressions, not just
1598 conditional expressions); assignment expressions will be diagnosed
1603 enumerator-list , enumerator
1606 enumeration-constant
1607 enumeration-constant = constant-expression
1610 static struct c_typespec
1611 c_parser_enum_specifier (c_parser
*parser
)
1613 struct c_typespec ret
;
1615 tree ident
= NULL_TREE
;
1616 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1617 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1618 c_parser_consume_token (parser
);
1619 attrs
= c_parser_attributes (parser
);
1620 /* Set the location in case we create a decl now. */
1621 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1622 if (c_parser_next_token_is (parser
, CPP_NAME
))
1624 ident
= c_parser_peek_token (parser
)->value
;
1625 ident_loc
= c_parser_peek_token (parser
)->location
;
1626 c_parser_consume_token (parser
);
1628 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1630 /* Parse an enum definition. */
1631 struct c_enum_contents the_enum
;
1632 tree type
= start_enum (&the_enum
, ident
);
1634 /* We chain the enumerators in reverse order, then put them in
1635 forward order at the end. */
1636 tree values
= NULL_TREE
;
1637 c_parser_consume_token (parser
);
1645 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1646 location_t value_loc
;
1647 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1649 c_parser_error (parser
, "expected identifier");
1650 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1651 values
= error_mark_node
;
1654 token
= c_parser_peek_token (parser
);
1655 enum_id
= token
->value
;
1656 /* Set the location in case we create a decl now. */
1657 c_parser_set_source_position_from_token (token
);
1658 value_loc
= token
->location
;
1659 c_parser_consume_token (parser
);
1660 if (c_parser_next_token_is (parser
, CPP_EQ
))
1662 c_parser_consume_token (parser
);
1663 value_loc
= c_parser_peek_token (parser
)->location
;
1664 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1667 enum_value
= NULL_TREE
;
1668 enum_decl
= build_enumerator (&the_enum
, enum_id
, enum_value
,
1670 TREE_CHAIN (enum_decl
) = values
;
1673 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1675 comma_loc
= c_parser_peek_token (parser
)->location
;
1677 c_parser_consume_token (parser
);
1679 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1681 if (seen_comma
&& !flag_isoc99
)
1682 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
1683 c_parser_consume_token (parser
);
1688 c_parser_error (parser
, "expected %<,%> or %<}%>");
1689 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1690 values
= error_mark_node
;
1694 postfix_attrs
= c_parser_attributes (parser
);
1695 ret
.spec
= finish_enum (type
, nreverse (values
),
1696 chainon (attrs
, postfix_attrs
));
1697 ret
.kind
= ctsk_tagdef
;
1698 ret
.expr
= NULL_TREE
;
1699 ret
.expr_const_operands
= true;
1704 c_parser_error (parser
, "expected %<{%>");
1705 ret
.spec
= error_mark_node
;
1706 ret
.kind
= ctsk_tagref
;
1707 ret
.expr
= NULL_TREE
;
1708 ret
.expr_const_operands
= true;
1711 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1712 /* In ISO C, enumerated types can be referred to only if already
1714 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1717 pedwarn (ident_loc
, OPT_pedantic
,
1718 "ISO C forbids forward references to %<enum%> types");
1723 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1725 struct-or-union-specifier:
1726 struct-or-union attributes[opt] identifier[opt]
1727 { struct-contents } attributes[opt]
1728 struct-or-union attributes[opt] identifier
1731 struct-declaration-list
1733 struct-declaration-list:
1734 struct-declaration ;
1735 struct-declaration-list struct-declaration ;
1742 struct-declaration-list struct-declaration
1744 struct-declaration-list:
1745 struct-declaration-list ;
1748 (Note that in the syntax here, unlike that in ISO C, the semicolons
1749 are included here rather than in struct-declaration, in order to
1750 describe the syntax with extra semicolons and missing semicolon at
1755 struct-declaration-list:
1756 @defs ( class-name )
1758 (Note this does not include a trailing semicolon, but can be
1759 followed by further declarations, and gets a pedwarn-if-pedantic
1760 when followed by a semicolon.) */
1762 static struct c_typespec
1763 c_parser_struct_or_union_specifier (c_parser
*parser
)
1765 struct c_typespec ret
;
1767 tree ident
= NULL_TREE
;
1768 enum tree_code code
;
1769 switch (c_parser_peek_token (parser
)->keyword
)
1780 c_parser_consume_token (parser
);
1781 attrs
= c_parser_attributes (parser
);
1782 /* Set the location in case we create a decl now. */
1783 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1784 if (c_parser_next_token_is (parser
, CPP_NAME
))
1786 ident
= c_parser_peek_token (parser
)->value
;
1787 c_parser_consume_token (parser
);
1789 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1791 /* Parse a struct or union definition. Start the scope of the
1792 tag before parsing components. */
1793 tree type
= start_struct (code
, ident
);
1795 /* We chain the components in reverse order, then put them in
1796 forward order at the end. Each struct-declaration may
1797 declare multiple components (comma-separated), so we must use
1798 chainon to join them, although when parsing each
1799 struct-declaration we can use TREE_CHAIN directly.
1801 The theory behind all this is that there will be more
1802 semicolon separated fields than comma separated fields, and
1803 so we'll be minimizing the number of node traversals required
1805 tree contents
= NULL_TREE
;
1806 c_parser_consume_token (parser
);
1807 /* Handle the Objective-C @defs construct,
1808 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1809 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1812 gcc_assert (c_dialect_objc ());
1813 c_parser_consume_token (parser
);
1814 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1816 if (c_parser_next_token_is (parser
, CPP_NAME
)
1817 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1819 name
= c_parser_peek_token (parser
)->value
;
1820 c_parser_consume_token (parser
);
1824 c_parser_error (parser
, "expected class name");
1825 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1828 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1830 contents
= nreverse (objc_get_class_ivars (name
));
1833 /* Parse the struct-declarations and semicolons. Problems with
1834 semicolons are diagnosed here; empty structures are diagnosed
1839 /* Parse any stray semicolon. */
1840 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1842 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1843 "extra semicolon in struct or union specified");
1844 c_parser_consume_token (parser
);
1847 /* Stop if at the end of the struct or union contents. */
1848 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1850 c_parser_consume_token (parser
);
1853 /* Accept #pragmas at struct scope. */
1854 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1856 c_parser_pragma (parser
, pragma_external
);
1859 /* Parse some comma-separated declarations, but not the
1860 trailing semicolon if any. */
1861 decls
= c_parser_struct_declaration (parser
);
1862 contents
= chainon (decls
, contents
);
1863 /* If no semicolon follows, either we have a parse error or
1864 are at the end of the struct or union and should
1866 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1867 c_parser_consume_token (parser
);
1870 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1871 pedwarn (c_parser_peek_token (parser
)->location
, 0,
1872 "no semicolon at end of struct or union");
1875 c_parser_error (parser
, "expected %<;%>");
1876 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1881 postfix_attrs
= c_parser_attributes (parser
);
1882 ret
.spec
= finish_struct (type
, nreverse (contents
),
1883 chainon (attrs
, postfix_attrs
));
1884 ret
.kind
= ctsk_tagdef
;
1885 ret
.expr
= NULL_TREE
;
1886 ret
.expr_const_operands
= true;
1891 c_parser_error (parser
, "expected %<{%>");
1892 ret
.spec
= error_mark_node
;
1893 ret
.kind
= ctsk_tagref
;
1894 ret
.expr
= NULL_TREE
;
1895 ret
.expr_const_operands
= true;
1898 ret
= parser_xref_tag (code
, ident
);
1902 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1903 the trailing semicolon.
1906 specifier-qualifier-list struct-declarator-list
1908 specifier-qualifier-list:
1909 type-specifier specifier-qualifier-list[opt]
1910 type-qualifier specifier-qualifier-list[opt]
1911 attributes specifier-qualifier-list[opt]
1913 struct-declarator-list:
1915 struct-declarator-list , attributes[opt] struct-declarator
1918 declarator attributes[opt]
1919 declarator[opt] : constant-expression attributes[opt]
1924 __extension__ struct-declaration
1925 specifier-qualifier-list
1927 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1928 of attributes where shown is a GNU extension. In GNU C, we accept
1929 any expression without commas in the syntax (assignment
1930 expressions, not just conditional expressions); assignment
1931 expressions will be diagnosed as non-constant. */
1934 c_parser_struct_declaration (c_parser
*parser
)
1936 struct c_declspecs
*specs
;
1938 tree all_prefix_attrs
;
1940 location_t decl_loc
;
1941 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
1945 ext
= disable_extension_diagnostics ();
1946 c_parser_consume_token (parser
);
1947 decl
= c_parser_struct_declaration (parser
);
1948 restore_extension_diagnostics (ext
);
1951 specs
= build_null_declspecs ();
1952 decl_loc
= c_parser_peek_token (parser
)->location
;
1953 c_parser_declspecs (parser
, specs
, false, true, true);
1956 if (!specs
->declspecs_seen_p
)
1958 c_parser_error (parser
, "expected specifier-qualifier-list");
1961 finish_declspecs (specs
);
1962 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1965 if (!specs
->type_seen_p
)
1967 pedwarn (decl_loc
, OPT_pedantic
,
1968 "ISO C forbids member declarations with no members");
1969 shadow_tag_warned (specs
, pedantic
);
1974 /* Support for unnamed structs or unions as members of
1975 structs or unions (which is [a] useful and [b] supports
1979 ret
= grokfield (c_parser_peek_token (parser
)->location
,
1980 build_id_declarator (NULL_TREE
), specs
,
1983 decl_attributes (&ret
, attrs
, 0);
1987 pending_xref_error ();
1988 prefix_attrs
= specs
->attrs
;
1989 all_prefix_attrs
= prefix_attrs
;
1990 specs
->attrs
= NULL_TREE
;
1994 /* Declaring one or more declarators or un-named bit-fields. */
1995 struct c_declarator
*declarator
;
1997 if (c_parser_next_token_is (parser
, CPP_COLON
))
1998 declarator
= build_id_declarator (NULL_TREE
);
2000 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2001 C_DTR_NORMAL
, &dummy
);
2002 if (declarator
== NULL
)
2004 c_parser_skip_to_end_of_block_or_statement (parser
);
2007 if (c_parser_next_token_is (parser
, CPP_COLON
)
2008 || c_parser_next_token_is (parser
, CPP_COMMA
)
2009 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2010 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2011 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2013 tree postfix_attrs
= NULL_TREE
;
2014 tree width
= NULL_TREE
;
2016 if (c_parser_next_token_is (parser
, CPP_COLON
))
2018 c_parser_consume_token (parser
);
2019 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2021 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2022 postfix_attrs
= c_parser_attributes (parser
);
2023 d
= grokfield (c_parser_peek_token (parser
)->location
,
2024 declarator
, specs
, width
, &all_prefix_attrs
);
2025 decl_attributes (&d
, chainon (postfix_attrs
,
2026 all_prefix_attrs
), 0);
2027 TREE_CHAIN (d
) = decls
;
2029 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2030 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2033 all_prefix_attrs
= prefix_attrs
;
2034 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2035 c_parser_consume_token (parser
);
2036 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2037 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2039 /* Semicolon consumed in caller. */
2044 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2050 c_parser_error (parser
,
2051 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2052 "%<__attribute__%>");
2059 /* Parse a typeof specifier (a GNU extension).
2062 typeof ( expression )
2063 typeof ( type-name )
2066 static struct c_typespec
2067 c_parser_typeof_specifier (c_parser
*parser
)
2069 struct c_typespec ret
;
2070 ret
.kind
= ctsk_typeof
;
2071 ret
.spec
= error_mark_node
;
2072 ret
.expr
= NULL_TREE
;
2073 ret
.expr_const_operands
= true;
2074 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2075 c_parser_consume_token (parser
);
2078 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2084 if (c_parser_next_token_starts_typename (parser
))
2086 struct c_type_name
*type
= c_parser_type_name (parser
);
2091 ret
.spec
= groktypename (type
, &ret
.expr
, &ret
.expr_const_operands
);
2092 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2098 location_t here
= c_parser_peek_token (parser
)->location
;
2099 struct c_expr expr
= c_parser_expression (parser
);
2102 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2103 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2104 error_at (here
, "%<typeof%> applied to a bit-field");
2105 ret
.spec
= TREE_TYPE (expr
.value
);
2106 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2107 /* This is returned with the type so that when the type is
2108 evaluated, this can be evaluated. */
2110 ret
.expr
= c_fully_fold (expr
.value
, false, &ret
.expr_const_operands
);
2111 pop_maybe_used (was_vm
);
2113 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2117 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2118 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2119 be redeclared; otherwise it may not. KIND indicates which kind of
2120 declarator is wanted. Returns a valid declarator except in the
2121 case of a syntax error in which case NULL is returned. *SEEN_ID is
2122 set to true if an identifier being declared is seen; this is used
2123 to diagnose bad forms of abstract array declarators and to
2124 determine whether an identifier list is syntactically permitted.
2127 pointer[opt] direct-declarator
2131 ( attributes[opt] declarator )
2132 direct-declarator array-declarator
2133 direct-declarator ( parameter-type-list )
2134 direct-declarator ( identifier-list[opt] )
2137 * type-qualifier-list[opt]
2138 * type-qualifier-list[opt] pointer
2140 type-qualifier-list:
2143 type-qualifier-list type-qualifier
2144 type-qualifier-list attributes
2146 parameter-type-list:
2148 parameter-list , ...
2151 parameter-declaration
2152 parameter-list , parameter-declaration
2154 parameter-declaration:
2155 declaration-specifiers declarator attributes[opt]
2156 declaration-specifiers abstract-declarator[opt] attributes[opt]
2160 identifier-list , identifier
2162 abstract-declarator:
2164 pointer[opt] direct-abstract-declarator
2166 direct-abstract-declarator:
2167 ( attributes[opt] abstract-declarator )
2168 direct-abstract-declarator[opt] array-declarator
2169 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2174 direct-declarator ( parameter-forward-declarations
2175 parameter-type-list[opt] )
2177 direct-abstract-declarator:
2178 direct-abstract-declarator[opt] ( parameter-forward-declarations
2179 parameter-type-list[opt] )
2181 parameter-forward-declarations:
2183 parameter-forward-declarations parameter-list ;
2185 The uses of attributes shown above are GNU extensions.
2187 Some forms of array declarator are not included in C99 in the
2188 syntax for abstract declarators; these are disallowed elsewhere.
2189 This may be a defect (DR#289).
2191 This function also accepts an omitted abstract declarator as being
2192 an abstract declarator, although not part of the formal syntax. */
2194 static struct c_declarator
*
2195 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2198 /* Parse any initial pointer part. */
2199 if (c_parser_next_token_is (parser
, CPP_MULT
))
2201 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2202 struct c_declarator
*inner
;
2203 c_parser_consume_token (parser
);
2204 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2205 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2209 return make_pointer_declarator (quals_attrs
, inner
);
2211 /* Now we have a direct declarator, direct abstract declarator or
2212 nothing (which counts as a direct abstract declarator here). */
2213 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2216 /* Parse a direct declarator or direct abstract declarator; arguments
2217 as c_parser_declarator. */
2219 static struct c_declarator
*
2220 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2223 /* The direct declarator must start with an identifier (possibly
2224 omitted) or a parenthesized declarator (possibly abstract). In
2225 an ordinary declarator, initial parentheses must start a
2226 parenthesized declarator. In an abstract declarator or parameter
2227 declarator, they could start a parenthesized declarator or a
2228 parameter list. To tell which, the open parenthesis and any
2229 following attributes must be read. If a declaration specifier
2230 follows, then it is a parameter list; if the specifier is a
2231 typedef name, there might be an ambiguity about redeclaring it,
2232 which is resolved in the direction of treating it as a typedef
2233 name. If a close parenthesis follows, it is also an empty
2234 parameter list, as the syntax does not permit empty abstract
2235 declarators. Otherwise, it is a parenthesized declarator (in
2236 which case the analysis may be repeated inside it, recursively).
2238 ??? There is an ambiguity in a parameter declaration "int
2239 (__attribute__((foo)) x)", where x is not a typedef name: it
2240 could be an abstract declarator for a function, or declare x with
2241 parentheses. The proper resolution of this ambiguity needs
2242 documenting. At present we follow an accident of the old
2243 parser's implementation, whereby the first parameter must have
2244 some declaration specifiers other than just attributes. Thus as
2245 a parameter declaration it is treated as a parenthesized
2246 parameter named x, and as an abstract declarator it is
2249 ??? Also following the old parser, attributes inside an empty
2250 parameter list are ignored, making it a list not yielding a
2251 prototype, rather than giving an error or making it have one
2252 parameter with implicit type int.
2254 ??? Also following the old parser, typedef names may be
2255 redeclared in declarators, but not Objective-C class names. */
2257 if (kind
!= C_DTR_ABSTRACT
2258 && c_parser_next_token_is (parser
, CPP_NAME
)
2260 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2261 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2263 struct c_declarator
*inner
2264 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2266 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2267 c_parser_consume_token (parser
);
2268 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2271 if (kind
!= C_DTR_NORMAL
2272 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2274 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2275 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2278 /* Either we are at the end of an abstract declarator, or we have
2281 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2284 struct c_declarator
*inner
;
2285 c_parser_consume_token (parser
);
2286 attrs
= c_parser_attributes (parser
);
2287 if (kind
!= C_DTR_NORMAL
2288 && (c_parser_next_token_starts_declspecs (parser
)
2289 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2291 struct c_arg_info
*args
2292 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2299 = build_function_declarator (args
,
2300 build_id_declarator (NULL_TREE
));
2301 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2305 /* A parenthesized declarator. */
2306 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2307 if (inner
!= NULL
&& attrs
!= NULL
)
2308 inner
= build_attrs_declarator (attrs
, inner
);
2309 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2311 c_parser_consume_token (parser
);
2315 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2319 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2326 if (kind
== C_DTR_NORMAL
)
2328 c_parser_error (parser
, "expected identifier or %<(%>");
2332 return build_id_declarator (NULL_TREE
);
2336 /* Parse part of a direct declarator or direct abstract declarator,
2337 given that some (in INNER) has already been parsed; ID_PRESENT is
2338 true if an identifier is present, false for an abstract
2341 static struct c_declarator
*
2342 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2343 struct c_declarator
*inner
)
2345 /* Parse a sequence of array declarators and parameter lists. */
2346 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2348 struct c_declarator
*declarator
;
2349 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2353 c_parser_consume_token (parser
);
2354 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2355 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2357 c_parser_consume_token (parser
);
2358 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2359 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2360 if (!quals_attrs
->declspecs_seen_p
)
2362 /* If "static" is present, there must be an array dimension.
2363 Otherwise, there may be a dimension, "*", or no
2368 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2372 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2377 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2379 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2383 c_parser_consume_token (parser
);
2388 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2394 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2397 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2398 c_parser_consume_token (parser
);
2401 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2405 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2407 if (declarator
== NULL
)
2409 inner
= set_array_declarator_inner (declarator
, inner
);
2410 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2412 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2415 struct c_arg_info
*args
;
2416 c_parser_consume_token (parser
);
2417 attrs
= c_parser_attributes (parser
);
2418 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2423 inner
= build_function_declarator (args
, inner
);
2424 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2430 /* Parse a parameter list or identifier list, including the closing
2431 parenthesis but not the opening one. ATTRS are the attributes at
2432 the start of the list. ID_LIST_OK is true if an identifier list is
2433 acceptable; such a list must not have attributes at the start. */
2435 static struct c_arg_info
*
2436 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2439 declare_parm_level ();
2440 /* If the list starts with an identifier, it is an identifier list.
2441 Otherwise, it is either a prototype list or an empty list. */
2444 && c_parser_next_token_is (parser
, CPP_NAME
)
2445 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2447 tree list
= NULL_TREE
, *nextp
= &list
;
2448 while (c_parser_next_token_is (parser
, CPP_NAME
)
2449 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2451 *nextp
= build_tree_list (NULL_TREE
,
2452 c_parser_peek_token (parser
)->value
);
2453 nextp
= & TREE_CHAIN (*nextp
);
2454 c_parser_consume_token (parser
);
2455 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2457 c_parser_consume_token (parser
);
2458 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2460 c_parser_error (parser
, "expected identifier");
2464 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2466 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2471 ret
->pending_sizes
= 0;
2472 ret
->had_vla_unspec
= 0;
2473 c_parser_consume_token (parser
);
2479 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2487 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
2493 /* Parse a parameter list (possibly empty), including the closing
2494 parenthesis but not the opening one. ATTRS are the attributes at
2495 the start of the list. */
2497 static struct c_arg_info
*
2498 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
2500 bool good_parm
= false;
2501 /* ??? Following the old parser, forward parameter declarations may
2502 use abstract declarators, and if no real parameter declarations
2503 follow the forward declarations then this is not diagnosed. Also
2504 note as above that attributes are ignored as the only contents of
2505 the parentheses, or as the only contents after forward
2507 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2509 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2514 ret
->pending_sizes
= 0;
2515 ret
->had_vla_unspec
= 0;
2516 c_parser_consume_token (parser
);
2519 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2521 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2525 ret
->pending_sizes
= 0;
2526 ret
->had_vla_unspec
= 0;
2527 /* Suppress -Wold-style-definition for this case. */
2528 ret
->types
= error_mark_node
;
2529 error_at (c_parser_peek_token (parser
)->location
,
2530 "ISO C requires a named argument before %<...%>");
2531 c_parser_consume_token (parser
);
2532 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2534 c_parser_consume_token (parser
);
2539 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2544 /* Nonempty list of parameters, either terminated with semicolon
2545 (forward declarations; recurse) or with close parenthesis (normal
2546 function) or with ", ... )" (variadic function). */
2549 /* Parse a parameter. */
2550 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2555 push_parm_decl (parm
);
2557 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2560 c_parser_consume_token (parser
);
2561 mark_forward_parm_decls ();
2562 new_attrs
= c_parser_attributes (parser
);
2563 return c_parser_parms_list_declarator (parser
, new_attrs
);
2565 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2567 c_parser_consume_token (parser
);
2569 return get_parm_info (false);
2572 struct c_arg_info
*ret
2573 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2578 ret
->pending_sizes
= 0;
2579 ret
->had_vla_unspec
= 0;
2583 if (!c_parser_require (parser
, CPP_COMMA
,
2584 "expected %<;%>, %<,%> or %<)%>"))
2586 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2587 get_pending_sizes ();
2590 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2592 c_parser_consume_token (parser
);
2593 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2595 c_parser_consume_token (parser
);
2597 return get_parm_info (true);
2600 struct c_arg_info
*ret
2601 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2606 ret
->pending_sizes
= 0;
2607 ret
->had_vla_unspec
= 0;
2613 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2615 get_pending_sizes ();
2622 /* Parse a parameter declaration. ATTRS are the attributes at the
2623 start of the declaration if it is the first parameter. */
2625 static struct c_parm
*
2626 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2628 struct c_declspecs
*specs
;
2629 struct c_declarator
*declarator
;
2631 tree postfix_attrs
= NULL_TREE
;
2633 if (!c_parser_next_token_starts_declspecs (parser
))
2635 /* ??? In some Objective-C cases '...' isn't applicable so there
2636 should be a different message. */
2637 c_parser_error (parser
,
2638 "expected declaration specifiers or %<...%>");
2639 c_parser_skip_to_end_of_parameter (parser
);
2642 specs
= build_null_declspecs ();
2645 declspecs_add_attrs (specs
, attrs
);
2648 c_parser_declspecs (parser
, specs
, true, true, true);
2649 finish_declspecs (specs
);
2650 pending_xref_error ();
2651 prefix_attrs
= specs
->attrs
;
2652 specs
->attrs
= NULL_TREE
;
2653 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2654 C_DTR_PARM
, &dummy
);
2655 if (declarator
== NULL
)
2657 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2660 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2661 postfix_attrs
= c_parser_attributes (parser
);
2662 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2666 /* Parse a string literal in an asm expression. It should not be
2667 translated, and wide string literals are an error although
2668 permitted by the syntax. This is a GNU extension.
2673 ??? At present, following the old parser, the caller needs to have
2674 set lex_untranslated_string to 1. It would be better to follow the
2675 C++ parser rather than using this kludge. */
2678 c_parser_asm_string_literal (c_parser
*parser
)
2681 if (c_parser_next_token_is (parser
, CPP_STRING
))
2683 str
= c_parser_peek_token (parser
)->value
;
2684 c_parser_consume_token (parser
);
2686 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2688 error_at (c_parser_peek_token (parser
)->location
,
2689 "wide string literal in %<asm%>");
2690 str
= build_string (1, "");
2691 c_parser_consume_token (parser
);
2695 c_parser_error (parser
, "expected string literal");
2701 /* Parse a simple asm expression. This is used in restricted
2702 contexts, where a full expression with inputs and outputs does not
2703 make sense. This is a GNU extension.
2706 asm ( asm-string-literal )
2710 c_parser_simple_asm_expr (c_parser
*parser
)
2713 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2714 /* ??? Follow the C++ parser rather than using the
2715 lex_untranslated_string kludge. */
2716 parser
->lex_untranslated_string
= true;
2717 c_parser_consume_token (parser
);
2718 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2720 parser
->lex_untranslated_string
= false;
2723 str
= c_parser_asm_string_literal (parser
);
2724 parser
->lex_untranslated_string
= false;
2725 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2727 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2733 /* Parse (possibly empty) attributes. This is a GNU extension.
2737 attributes attribute
2740 __attribute__ ( ( attribute-list ) )
2744 attribute_list , attrib
2749 any-word ( identifier )
2750 any-word ( identifier , nonempty-expr-list )
2751 any-word ( expr-list )
2753 where the "identifier" must not be declared as a type, and
2754 "any-word" may be any identifier (including one declared as a
2755 type), a reserved word storage class specifier, type specifier or
2756 type qualifier. ??? This still leaves out most reserved keywords
2757 (following the old parser), shouldn't we include them, and why not
2758 allow identifiers declared as types to start the arguments? */
2761 c_parser_attributes (c_parser
*parser
)
2763 tree attrs
= NULL_TREE
;
2764 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2766 /* ??? Follow the C++ parser rather than using the
2767 lex_untranslated_string kludge. */
2768 parser
->lex_untranslated_string
= true;
2769 c_parser_consume_token (parser
);
2770 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2772 parser
->lex_untranslated_string
= false;
2775 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2777 parser
->lex_untranslated_string
= false;
2778 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2781 /* Parse the attribute list. */
2782 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2783 || c_parser_next_token_is (parser
, CPP_NAME
)
2784 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2786 tree attr
, attr_name
, attr_args
;
2787 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2789 c_parser_consume_token (parser
);
2792 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2794 /* ??? See comment above about what keywords are
2797 switch (c_parser_peek_token (parser
)->keyword
)
2834 /* Accept __attribute__((__const)) as __attribute__((const))
2837 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
2840 attr_name
= c_parser_peek_token (parser
)->value
;
2841 c_parser_consume_token (parser
);
2842 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2844 attr
= build_tree_list (attr_name
, NULL_TREE
);
2845 attrs
= chainon (attrs
, attr
);
2848 c_parser_consume_token (parser
);
2849 /* Parse the attribute contents. If they start with an
2850 identifier which is followed by a comma or close
2851 parenthesis, then the arguments start with that
2852 identifier; otherwise they are an expression list. */
2853 if (c_parser_next_token_is (parser
, CPP_NAME
)
2854 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2855 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2856 || (c_parser_peek_2nd_token (parser
)->type
2857 == CPP_CLOSE_PAREN
)))
2859 tree arg1
= c_parser_peek_token (parser
)->value
;
2860 c_parser_consume_token (parser
);
2861 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2862 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2865 c_parser_consume_token (parser
);
2866 attr_args
= tree_cons (NULL_TREE
, arg1
,
2867 c_parser_expr_list (parser
, false,
2873 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2874 attr_args
= NULL_TREE
;
2876 attr_args
= c_parser_expr_list (parser
, false, true);
2878 attr
= build_tree_list (attr_name
, attr_args
);
2879 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2880 c_parser_consume_token (parser
);
2883 parser
->lex_untranslated_string
= false;
2884 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2888 attrs
= chainon (attrs
, attr
);
2890 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2891 c_parser_consume_token (parser
);
2894 parser
->lex_untranslated_string
= false;
2895 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
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 parser
->lex_untranslated_string
= false;
2913 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2916 specifier-qualifier-list abstract-declarator[opt]
2919 static struct c_type_name
*
2920 c_parser_type_name (c_parser
*parser
)
2922 struct c_declspecs
*specs
= build_null_declspecs ();
2923 struct c_declarator
*declarator
;
2924 struct c_type_name
*ret
;
2926 c_parser_declspecs (parser
, specs
, false, true, true);
2927 if (!specs
->declspecs_seen_p
)
2929 c_parser_error (parser
, "expected specifier-qualifier-list");
2932 pending_xref_error ();
2933 finish_declspecs (specs
);
2934 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2935 C_DTR_ABSTRACT
, &dummy
);
2936 if (declarator
== NULL
)
2938 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2940 ret
->declarator
= declarator
;
2944 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2947 assignment-expression
2948 { initializer-list }
2949 { initializer-list , }
2952 designation[opt] initializer
2953 initializer-list , designation[opt] initializer
2960 designator-list designator
2967 [ constant-expression ]
2979 [ constant-expression ... constant-expression ]
2981 Any expression without commas is accepted in the syntax for the
2982 constant-expressions, with non-constant expressions rejected later.
2984 This function is only used for top-level initializers; for nested
2985 ones, see c_parser_initval. */
2987 static struct c_expr
2988 c_parser_initializer (c_parser
*parser
)
2990 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2991 return c_parser_braced_init (parser
, NULL_TREE
, false);
2995 ret
= c_parser_expr_no_commas (parser
, NULL
);
2996 if (TREE_CODE (ret
.value
) != STRING_CST
2997 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
2998 ret
= default_function_array_conversion (ret
);
3003 /* Parse a braced initializer list. TYPE is the type specified for a
3004 compound literal, and NULL_TREE for other initializers and for
3005 nested braced lists. NESTED_P is true for nested braced lists,
3006 false for the list of a compound literal or the list that is the
3007 top-level initializer in a declaration. */
3009 static struct c_expr
3010 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3012 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3013 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3014 c_parser_consume_token (parser
);
3016 push_init_level (0);
3018 really_start_incremental_init (type
);
3019 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3021 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3025 /* Parse a non-empty initializer list, possibly with a trailing
3029 c_parser_initelt (parser
);
3032 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3033 c_parser_consume_token (parser
);
3036 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3040 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3043 ret
.value
= error_mark_node
;
3044 ret
.original_code
= ERROR_MARK
;
3045 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3049 c_parser_consume_token (parser
);
3050 return pop_init_level (0);
3053 /* Parse a nested initializer, including designators. */
3056 c_parser_initelt (c_parser
*parser
)
3058 /* Parse any designator or designator list. A single array
3059 designator may have the subsequent "=" omitted in GNU C, but a
3060 longer list or a structure member designator may not. */
3061 if (c_parser_next_token_is (parser
, CPP_NAME
)
3062 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3064 /* Old-style structure member designator. */
3065 set_init_label (c_parser_peek_token (parser
)->value
);
3066 /* Use the colon as the error location. */
3067 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3068 "obsolete use of designated initializer with %<:%>");
3069 c_parser_consume_token (parser
);
3070 c_parser_consume_token (parser
);
3074 /* des_seen is 0 if there have been no designators, 1 if there
3075 has been a single array designator and 2 otherwise. */
3077 /* Location of a designator. */
3078 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3079 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3080 || c_parser_next_token_is (parser
, CPP_DOT
))
3082 int des_prev
= des_seen
;
3084 des_loc
= c_parser_peek_token (parser
)->location
;
3087 if (c_parser_next_token_is (parser
, CPP_DOT
))
3090 c_parser_consume_token (parser
);
3091 if (c_parser_next_token_is (parser
, CPP_NAME
))
3093 set_init_label (c_parser_peek_token (parser
)->value
);
3094 c_parser_consume_token (parser
);
3099 init
.value
= error_mark_node
;
3100 init
.original_code
= ERROR_MARK
;
3101 c_parser_error (parser
, "expected identifier");
3102 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3103 process_init_element (init
, false);
3110 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3111 /* ??? Following the old parser, [ objc-receiver
3112 objc-message-args ] is accepted as an initializer,
3113 being distinguished from a designator by what follows
3114 the first assignment expression inside the square
3115 brackets, but after a first array designator a
3116 subsequent square bracket is for Objective-C taken to
3117 start an expression, using the obsolete form of
3118 designated initializer without '=', rather than
3119 possibly being a second level of designation: in LALR
3120 terms, the '[' is shifted rather than reducing
3121 designator to designator-list. */
3122 if (des_prev
== 1 && c_dialect_objc ())
3124 des_seen
= des_prev
;
3127 if (des_prev
== 0 && c_dialect_objc ())
3129 /* This might be an array designator or an
3130 Objective-C message expression. If the former,
3131 continue parsing here; if the latter, parse the
3132 remainder of the initializer given the starting
3133 primary-expression. ??? It might make sense to
3134 distinguish when des_prev == 1 as well; see
3135 previous comment. */
3137 struct c_expr mexpr
;
3138 c_parser_consume_token (parser
);
3139 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3140 && ((c_parser_peek_token (parser
)->id_kind
3142 || (c_parser_peek_token (parser
)->id_kind
3143 == C_ID_CLASSNAME
)))
3145 /* Type name receiver. */
3146 tree id
= c_parser_peek_token (parser
)->value
;
3147 c_parser_consume_token (parser
);
3148 rec
= objc_get_class_reference (id
);
3149 goto parse_message_args
;
3151 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3152 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3153 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3154 goto array_desig_after_first
;
3155 /* Expression receiver. So far only one part
3156 without commas has been parsed; there might be
3157 more of the expression. */
3159 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3162 c_parser_consume_token (parser
);
3163 next
= c_parser_expr_no_commas (parser
, NULL
);
3164 next
= default_function_array_conversion (next
);
3165 rec
= build_compound_expr (rec
, next
.value
);
3168 /* Now parse the objc-message-args. */
3169 args
= c_parser_objc_message_args (parser
);
3170 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3173 = objc_build_message_expr (build_tree_list (rec
, args
));
3174 mexpr
.original_code
= ERROR_MARK
;
3175 /* Now parse and process the remainder of the
3176 initializer, starting with this message
3177 expression as a primary-expression. */
3178 c_parser_initval (parser
, &mexpr
);
3181 c_parser_consume_token (parser
);
3182 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3183 array_desig_after_first
:
3184 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3186 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3187 c_parser_consume_token (parser
);
3188 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3192 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3194 c_parser_consume_token (parser
);
3195 set_init_index (first
, second
);
3197 pedwarn (ellipsis_loc
, OPT_pedantic
,
3198 "ISO C forbids specifying range of elements to initialize");
3201 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3207 if (c_parser_next_token_is (parser
, CPP_EQ
))
3210 pedwarn (des_loc
, OPT_pedantic
,
3211 "ISO C90 forbids specifying subobject to initialize");
3212 c_parser_consume_token (parser
);
3217 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3218 "obsolete use of designated initializer without %<=%>");
3222 init
.value
= error_mark_node
;
3223 init
.original_code
= ERROR_MARK
;
3224 c_parser_error (parser
, "expected %<=%>");
3225 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3226 process_init_element (init
, false);
3232 c_parser_initval (parser
, NULL
);
3235 /* Parse a nested initializer; as c_parser_initializer but parses
3236 initializers within braced lists, after any designators have been
3237 applied. If AFTER is not NULL then it is an Objective-C message
3238 expression which is the primary-expression starting the
3242 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3245 gcc_assert (!after
|| c_dialect_objc ());
3246 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3247 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3250 init
= c_parser_expr_no_commas (parser
, after
);
3251 if (init
.value
!= NULL_TREE
3252 && TREE_CODE (init
.value
) != STRING_CST
3253 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3254 init
= default_function_array_conversion (init
);
3256 process_init_element (init
, false);
3259 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3263 { block-item-list[opt] }
3264 { label-declarations block-item-list }
3268 block-item-list block-item
3280 { label-declarations block-item-list }
3283 __extension__ nested-declaration
3284 nested-function-definition
3288 label-declarations label-declaration
3291 __label__ identifier-list ;
3293 Allowing the mixing of declarations and code is new in C99. The
3294 GNU syntax also permits (not shown above) labels at the end of
3295 compound statements, which yield an error. We don't allow labels
3296 on declarations; this might seem like a natural extension, but
3297 there would be a conflict between attributes on the label and
3298 prefix attributes on the declaration. ??? The syntax follows the
3299 old parser in requiring something after label declarations.
3300 Although they are erroneous if the labels declared aren't defined,
3301 is it useful for the syntax to be this way?
3313 c_parser_compound_statement (c_parser
*parser
)
3316 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3318 /* Ensure a scope is entered and left anyway to avoid confusion
3319 if we have just prepared to enter a function body. */
3320 stmt
= c_begin_compound_stmt (true);
3321 c_end_compound_stmt (stmt
, true);
3322 return error_mark_node
;
3324 stmt
= c_begin_compound_stmt (true);
3325 c_parser_compound_statement_nostart (parser
);
3326 return c_end_compound_stmt (stmt
, true);
3329 /* Parse a compound statement except for the opening brace. This is
3330 used for parsing both compound statements and statement expressions
3331 (which follow different paths to handling the opening). */
3334 c_parser_compound_statement_nostart (c_parser
*parser
)
3336 bool last_stmt
= false;
3337 bool last_label
= false;
3338 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3339 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3341 c_parser_consume_token (parser
);
3344 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3346 location_t err_loc
= c_parser_peek_token (parser
)->location
;
3347 /* Read zero or more forward-declarations for labels that nested
3348 functions can jump to. */
3349 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3351 c_parser_consume_token (parser
);
3352 /* Any identifiers, including those declared as type names,
3357 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3359 c_parser_error (parser
, "expected identifier");
3363 = declare_label (c_parser_peek_token (parser
)->value
);
3364 C_DECLARED_LABEL_FLAG (label
) = 1;
3365 add_stmt (build_stmt (DECL_EXPR
, label
));
3366 c_parser_consume_token (parser
);
3367 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3368 c_parser_consume_token (parser
);
3372 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3374 pedwarn (err_loc
, OPT_pedantic
, "ISO C forbids label declarations");
3376 /* We must now have at least one statement, label or declaration. */
3377 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3379 c_parser_error (parser
, "expected declaration or statement");
3380 c_parser_consume_token (parser
);
3383 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3385 location_t loc
= c_parser_peek_token (parser
)->location
;
3386 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3387 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3388 || (c_parser_next_token_is (parser
, CPP_NAME
)
3389 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3391 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3392 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
3394 label_loc
= c_parser_peek_token (parser
)->location
;
3397 c_parser_label (parser
);
3399 else if (!last_label
3400 && c_parser_next_token_starts_declspecs (parser
))
3403 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3406 (pedantic
&& !flag_isoc99
)
3408 : OPT_Wdeclaration_after_statement
,
3409 "ISO C90 forbids mixed declarations and code");
3412 else if (!last_label
3413 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3415 /* __extension__ can start a declaration, but is also an
3416 unary operator that can start an expression. Consume all
3417 but the last of a possible series of __extension__ to
3419 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3420 && (c_parser_peek_2nd_token (parser
)->keyword
3422 c_parser_consume_token (parser
);
3423 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3426 ext
= disable_extension_diagnostics ();
3427 c_parser_consume_token (parser
);
3429 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3430 /* Following the old parser, __extension__ does not
3431 disable this diagnostic. */
3432 restore_extension_diagnostics (ext
);
3434 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
3436 : OPT_Wdeclaration_after_statement
,
3437 "ISO C90 forbids mixed declarations and code");
3443 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3445 /* External pragmas, and some omp pragmas, are not associated
3446 with regular c code, and so are not to be considered statements
3447 syntactically. This ensures that the user doesn't put them
3448 places that would turn into syntax errors if the directive
3450 if (c_parser_pragma (parser
, pragma_compound
))
3451 last_label
= false, last_stmt
= true;
3453 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3455 c_parser_error (parser
, "expected declaration or statement");
3458 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3460 if (parser
->in_if_block
)
3462 error_at (loc
, """expected %<}%> before %<else%>");
3467 error_at (loc
, "%<else%> without a previous %<if%>");
3468 c_parser_consume_token (parser
);
3477 c_parser_statement_after_labels (parser
);
3480 parser
->error
= false;
3483 error_at (label_loc
, "label at end of compound statement");
3484 c_parser_consume_token (parser
);
3487 /* Parse a label (C90 6.6.1, C99 6.8.1).
3490 identifier : attributes[opt]
3491 case constant-expression :
3497 case constant-expression ... constant-expression :
3499 The use of attributes on labels is a GNU extension. The syntax in
3500 GNU C accepts any expressions without commas, non-constant
3501 expressions being rejected later. */
3504 c_parser_label (c_parser
*parser
)
3506 location_t loc1
= c_parser_peek_token (parser
)->location
;
3507 tree label
= NULL_TREE
;
3508 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3511 c_parser_consume_token (parser
);
3512 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3513 if (c_parser_next_token_is (parser
, CPP_COLON
))
3515 c_parser_consume_token (parser
);
3516 label
= do_case (exp1
, NULL_TREE
);
3518 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3520 c_parser_consume_token (parser
);
3521 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3522 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3523 label
= do_case (exp1
, exp2
);
3526 c_parser_error (parser
, "expected %<:%> or %<...%>");
3528 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3530 c_parser_consume_token (parser
);
3531 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3532 label
= do_case (NULL_TREE
, NULL_TREE
);
3536 tree name
= c_parser_peek_token (parser
)->value
;
3539 location_t loc2
= c_parser_peek_token (parser
)->location
;
3540 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3541 c_parser_consume_token (parser
);
3542 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3543 c_parser_consume_token (parser
);
3544 attrs
= c_parser_attributes (parser
);
3545 tlab
= define_label (loc2
, name
);
3548 decl_attributes (&tlab
, attrs
, 0);
3549 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3554 SET_EXPR_LOCATION (label
, loc1
);
3555 if (c_parser_next_token_starts_declspecs (parser
)
3556 && !(c_parser_next_token_is (parser
, CPP_NAME
)
3557 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3559 error_at (c_parser_peek_token (parser
)->location
,
3560 "a label can only be part of a statement and "
3561 "a declaration is not a statement");
3562 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
3563 /*nested*/ true, /*empty_ok*/ false,
3564 /*start_attr_ok*/ true);
3569 /* Parse a statement (C90 6.6, C99 6.8).
3574 expression-statement
3582 expression-statement:
3585 selection-statement:
3589 iteration-statement:
3598 return expression[opt] ;
3611 objc-throw-statement
3612 objc-try-catch-statement
3613 objc-synchronized-statement
3615 objc-throw-statement:
3629 parallel-for-construct
3630 parallel-sections-construct
3637 parallel-directive structured-block
3640 for-directive iteration-statement
3643 sections-directive section-scope
3646 single-directive structured-block
3648 parallel-for-construct:
3649 parallel-for-directive iteration-statement
3651 parallel-sections-construct:
3652 parallel-sections-directive section-scope
3655 master-directive structured-block
3658 critical-directive structured-block
3661 atomic-directive expression-statement
3664 ordered-directive structured-block */
3667 c_parser_statement (c_parser
*parser
)
3669 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3670 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3671 || (c_parser_next_token_is (parser
, CPP_NAME
)
3672 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3673 c_parser_label (parser
);
3674 c_parser_statement_after_labels (parser
);
3677 /* Parse a statement, other than a labeled statement. */
3680 c_parser_statement_after_labels (c_parser
*parser
)
3682 location_t loc
= c_parser_peek_token (parser
)->location
;
3683 tree stmt
= NULL_TREE
;
3684 bool in_if_block
= parser
->in_if_block
;
3685 parser
->in_if_block
= false;
3686 switch (c_parser_peek_token (parser
)->type
)
3688 case CPP_OPEN_BRACE
:
3689 add_stmt (c_parser_compound_statement (parser
));
3692 switch (c_parser_peek_token (parser
)->keyword
)
3695 c_parser_if_statement (parser
);
3698 c_parser_switch_statement (parser
);
3701 c_parser_while_statement (parser
);
3704 c_parser_do_statement (parser
);
3707 c_parser_for_statement (parser
);
3710 c_parser_consume_token (parser
);
3711 if (c_parser_next_token_is (parser
, CPP_NAME
))
3713 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3714 c_parser_consume_token (parser
);
3716 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3718 c_parser_consume_token (parser
);
3719 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3722 c_parser_error (parser
, "expected identifier or %<*%>");
3723 goto expect_semicolon
;
3725 c_parser_consume_token (parser
);
3726 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3727 goto expect_semicolon
;
3729 c_parser_consume_token (parser
);
3730 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3731 goto expect_semicolon
;
3733 c_parser_consume_token (parser
);
3734 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3736 stmt
= c_finish_return (NULL_TREE
);
3737 c_parser_consume_token (parser
);
3741 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3742 goto expect_semicolon
;
3746 stmt
= c_parser_asm_statement (parser
);
3749 gcc_assert (c_dialect_objc ());
3750 c_parser_consume_token (parser
);
3751 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3753 stmt
= objc_build_throw_stmt (NULL_TREE
);
3754 c_parser_consume_token (parser
);
3758 tree expr
= c_parser_expression (parser
).value
;
3759 expr
= c_fully_fold (expr
, false, NULL
);
3760 stmt
= objc_build_throw_stmt (expr
);
3761 goto expect_semicolon
;
3765 gcc_assert (c_dialect_objc ());
3766 c_parser_objc_try_catch_statement (parser
);
3768 case RID_AT_SYNCHRONIZED
:
3769 gcc_assert (c_dialect_objc ());
3770 c_parser_objc_synchronized_statement (parser
);
3777 c_parser_consume_token (parser
);
3779 case CPP_CLOSE_PAREN
:
3780 case CPP_CLOSE_SQUARE
:
3781 /* Avoid infinite loop in error recovery:
3782 c_parser_skip_until_found stops at a closing nesting
3783 delimiter without consuming it, but here we need to consume
3784 it to proceed further. */
3785 c_parser_error (parser
, "expected statement");
3786 c_parser_consume_token (parser
);
3789 c_parser_pragma (parser
, pragma_stmt
);
3793 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3795 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3798 /* Two cases cannot and do not have line numbers associated: If stmt
3799 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3800 cannot hold line numbers. But that's OK because the statement
3801 will either be changed to a MODIFY_EXPR during gimplification of
3802 the statement expr, or discarded. If stmt was compound, but
3803 without new variables, we will have skipped the creation of a
3804 BIND and will have a bare STATEMENT_LIST. But that's OK because
3805 (recursively) all of the component statements should already have
3806 line numbers assigned. ??? Can we discard no-op statements
3808 protected_set_expr_location (stmt
, loc
);
3810 parser
->in_if_block
= in_if_block
;
3813 /* Parse the condition from an if, do, while or for statements. */
3816 c_parser_condition (c_parser
*parser
)
3820 loc
= c_parser_peek_token (parser
)->location
;
3821 cond
= c_parser_expression_conv (parser
).value
;
3822 cond
= c_objc_common_truthvalue_conversion (loc
, cond
);
3823 cond
= c_fully_fold (cond
, false, NULL
);
3824 protected_set_expr_location (cond
, loc
);
3825 if (warn_sequence_point
)
3826 verify_sequence_points (cond
);
3830 /* Parse a parenthesized condition from an if, do or while statement.
3836 c_parser_paren_condition (c_parser
*parser
)
3839 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3840 return error_mark_node
;
3841 cond
= c_parser_condition (parser
);
3842 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3846 /* Parse a statement which is a block in C99. */
3849 c_parser_c99_block_statement (c_parser
*parser
)
3851 tree block
= c_begin_compound_stmt (flag_isoc99
);
3852 c_parser_statement (parser
);
3853 return c_end_compound_stmt (block
, flag_isoc99
);
3856 /* Parse the body of an if statement. This is just parsing a
3857 statement but (a) it is a block in C99, (b) we track whether the
3858 body is an if statement for the sake of -Wparentheses warnings, (c)
3859 we handle an empty body specially for the sake of -Wempty-body
3860 warnings, and (d) we call parser_compound_statement directly
3861 because c_parser_statement_after_labels resets
3862 parser->in_if_block. */
3865 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3867 tree block
= c_begin_compound_stmt (flag_isoc99
);
3868 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3869 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3870 || (c_parser_next_token_is (parser
, CPP_NAME
)
3871 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3872 c_parser_label (parser
);
3873 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3874 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3876 location_t loc
= c_parser_peek_token (parser
)->location
;
3877 add_stmt (build_empty_stmt ());
3878 c_parser_consume_token (parser
);
3879 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3880 warning_at (loc
, OPT_Wempty_body
,
3881 "suggest braces around empty body in an %<if%> statement");
3883 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3884 add_stmt (c_parser_compound_statement (parser
));
3886 c_parser_statement_after_labels (parser
);
3887 return c_end_compound_stmt (block
, flag_isoc99
);
3890 /* Parse the else body of an if statement. This is just parsing a
3891 statement but (a) it is a block in C99, (b) we handle an empty body
3892 specially for the sake of -Wempty-body warnings. */
3895 c_parser_else_body (c_parser
*parser
)
3897 tree block
= c_begin_compound_stmt (flag_isoc99
);
3898 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3899 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3900 || (c_parser_next_token_is (parser
, CPP_NAME
)
3901 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3902 c_parser_label (parser
);
3903 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3905 warning_at (c_parser_peek_token (parser
)->location
,
3907 "suggest braces around empty body in an %<else%> statement");
3908 add_stmt (build_empty_stmt ());
3909 c_parser_consume_token (parser
);
3912 c_parser_statement_after_labels (parser
);
3913 return c_end_compound_stmt (block
, flag_isoc99
);
3916 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3919 if ( expression ) statement
3920 if ( expression ) statement else statement
3924 c_parser_if_statement (c_parser
*parser
)
3929 bool first_if
= false;
3930 tree first_body
, second_body
;
3933 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3934 c_parser_consume_token (parser
);
3935 block
= c_begin_compound_stmt (flag_isoc99
);
3936 loc
= c_parser_peek_token (parser
)->location
;
3937 cond
= c_parser_paren_condition (parser
);
3938 in_if_block
= parser
->in_if_block
;
3939 parser
->in_if_block
= true;
3940 first_body
= c_parser_if_body (parser
, &first_if
);
3941 parser
->in_if_block
= in_if_block
;
3942 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3944 c_parser_consume_token (parser
);
3945 second_body
= c_parser_else_body (parser
);
3948 second_body
= NULL_TREE
;
3949 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3950 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3953 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3956 switch (expression) statement
3960 c_parser_switch_statement (c_parser
*parser
)
3962 tree block
, expr
, body
, save_break
;
3963 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3964 c_parser_consume_token (parser
);
3965 block
= c_begin_compound_stmt (flag_isoc99
);
3966 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3968 expr
= c_parser_expression (parser
).value
;
3969 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3972 expr
= error_mark_node
;
3973 c_start_case (expr
);
3974 save_break
= c_break_label
;
3975 c_break_label
= NULL_TREE
;
3976 body
= c_parser_c99_block_statement (parser
);
3977 c_finish_case (body
);
3979 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3980 c_break_label
= save_break
;
3981 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3984 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3987 while (expression) statement
3991 c_parser_while_statement (c_parser
*parser
)
3993 tree block
, cond
, body
, save_break
, save_cont
;
3995 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3996 c_parser_consume_token (parser
);
3997 block
= c_begin_compound_stmt (flag_isoc99
);
3998 loc
= c_parser_peek_token (parser
)->location
;
3999 cond
= c_parser_paren_condition (parser
);
4000 save_break
= c_break_label
;
4001 c_break_label
= NULL_TREE
;
4002 save_cont
= c_cont_label
;
4003 c_cont_label
= NULL_TREE
;
4004 body
= c_parser_c99_block_statement (parser
);
4005 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
4006 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4007 c_break_label
= save_break
;
4008 c_cont_label
= save_cont
;
4011 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
4014 do statement while ( expression ) ;
4018 c_parser_do_statement (c_parser
*parser
)
4020 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4022 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4023 c_parser_consume_token (parser
);
4024 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4025 warning_at (c_parser_peek_token (parser
)->location
,
4027 "suggest braces around empty body in %<do%> statement");
4028 block
= c_begin_compound_stmt (flag_isoc99
);
4029 loc
= c_parser_peek_token (parser
)->location
;
4030 save_break
= c_break_label
;
4031 c_break_label
= NULL_TREE
;
4032 save_cont
= c_cont_label
;
4033 c_cont_label
= NULL_TREE
;
4034 body
= c_parser_c99_block_statement (parser
);
4035 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4036 new_break
= c_break_label
;
4037 c_break_label
= save_break
;
4038 new_cont
= c_cont_label
;
4039 c_cont_label
= save_cont
;
4040 cond
= c_parser_paren_condition (parser
);
4041 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4042 c_parser_skip_to_end_of_block_or_statement (parser
);
4043 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4044 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4047 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4050 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4051 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4053 The form with a declaration is new in C99.
4055 ??? In accordance with the old parser, the declaration may be a
4056 nested function, which is then rejected in check_for_loop_decls,
4057 but does it make any sense for this to be included in the grammar?
4058 Note in particular that the nested function does not include a
4059 trailing ';', whereas the "declaration" production includes one.
4060 Also, can we reject bad declarations earlier and cheaper than
4061 check_for_loop_decls? */
4064 c_parser_for_statement (c_parser
*parser
)
4066 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4068 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4069 loc
= c_parser_peek_token (parser
)->location
;
4070 c_parser_consume_token (parser
);
4071 block
= c_begin_compound_stmt (flag_isoc99
);
4072 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4074 /* Parse the initialization declaration or expression. */
4075 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4077 c_parser_consume_token (parser
);
4078 c_finish_expr_stmt (NULL_TREE
);
4080 else if (c_parser_next_token_starts_declspecs (parser
))
4082 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4083 check_for_loop_decls ();
4085 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4087 /* __extension__ can start a declaration, but is also an
4088 unary operator that can start an expression. Consume all
4089 but the last of a possible series of __extension__ to
4091 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4092 && (c_parser_peek_2nd_token (parser
)->keyword
4094 c_parser_consume_token (parser
);
4095 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4098 ext
= disable_extension_diagnostics ();
4099 c_parser_consume_token (parser
);
4100 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4101 restore_extension_diagnostics (ext
);
4102 check_for_loop_decls ();
4110 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4111 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4113 /* Parse the loop condition. */
4114 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4116 c_parser_consume_token (parser
);
4121 cond
= c_parser_condition (parser
);
4122 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4124 /* Parse the increment expression. */
4125 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4126 incr
= c_process_expr_stmt (NULL_TREE
);
4128 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4129 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4133 cond
= error_mark_node
;
4134 incr
= error_mark_node
;
4136 save_break
= c_break_label
;
4137 c_break_label
= NULL_TREE
;
4138 save_cont
= c_cont_label
;
4139 c_cont_label
= NULL_TREE
;
4140 body
= c_parser_c99_block_statement (parser
);
4141 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4142 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4143 c_break_label
= save_break
;
4144 c_cont_label
= save_cont
;
4147 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4148 statement with inputs, outputs, clobbers, and volatile tag
4152 asm type-qualifier[opt] ( asm-argument ) ;
4156 asm-string-literal : asm-operands[opt]
4157 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4158 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4160 Qualifiers other than volatile are accepted in the syntax but
4164 c_parser_asm_statement (c_parser
*parser
)
4166 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4168 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4169 c_parser_consume_token (parser
);
4170 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4172 quals
= c_parser_peek_token (parser
)->value
;
4173 c_parser_consume_token (parser
);
4175 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4176 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4178 warning_at (c_parser_peek_token (parser
)->location
,
4180 "%E qualifier ignored on asm",
4181 c_parser_peek_token (parser
)->value
);
4183 c_parser_consume_token (parser
);
4187 /* ??? Follow the C++ parser rather than using the
4188 lex_untranslated_string kludge. */
4189 parser
->lex_untranslated_string
= true;
4190 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4192 parser
->lex_untranslated_string
= false;
4195 str
= c_parser_asm_string_literal (parser
);
4196 if (str
== NULL_TREE
)
4198 parser
->lex_untranslated_string
= false;
4199 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4202 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4205 outputs
= NULL_TREE
;
4207 clobbers
= NULL_TREE
;
4210 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4212 parser
->lex_untranslated_string
= false;
4213 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4217 /* Parse outputs. */
4218 if (c_parser_next_token_is (parser
, CPP_COLON
)
4219 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4220 outputs
= NULL_TREE
;
4222 outputs
= c_parser_asm_operands (parser
, false);
4223 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4226 clobbers
= NULL_TREE
;
4229 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4231 parser
->lex_untranslated_string
= false;
4232 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4236 if (c_parser_next_token_is (parser
, CPP_COLON
)
4237 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4240 inputs
= c_parser_asm_operands (parser
, true);
4241 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4243 clobbers
= NULL_TREE
;
4246 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4248 parser
->lex_untranslated_string
= false;
4249 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4252 /* Parse clobbers. */
4253 clobbers
= c_parser_asm_clobbers (parser
);
4255 parser
->lex_untranslated_string
= false;
4256 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4258 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4261 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4262 c_parser_skip_to_end_of_block_or_statement (parser
);
4263 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4268 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4269 not outputs), apply the default conversion of functions and arrays
4274 asm-operands , asm-operand
4277 asm-string-literal ( expression )
4278 [ identifier ] asm-string-literal ( expression )
4282 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4284 tree list
= NULL_TREE
;
4289 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4291 c_parser_consume_token (parser
);
4292 if (c_parser_next_token_is (parser
, CPP_NAME
))
4294 tree id
= c_parser_peek_token (parser
)->value
;
4295 c_parser_consume_token (parser
);
4296 name
= build_string (IDENTIFIER_LENGTH (id
),
4297 IDENTIFIER_POINTER (id
));
4301 c_parser_error (parser
, "expected identifier");
4302 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4305 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4310 str
= c_parser_asm_string_literal (parser
);
4311 if (str
== NULL_TREE
)
4313 parser
->lex_untranslated_string
= false;
4314 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4316 parser
->lex_untranslated_string
= true;
4319 expr
= c_parser_expression (parser
);
4321 expr
= default_function_array_conversion (expr
);
4322 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
4323 parser
->lex_untranslated_string
= true;
4324 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4326 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4329 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4331 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4332 c_parser_consume_token (parser
);
4339 /* Parse asm clobbers, a GNU extension.
4343 asm-clobbers , asm-string-literal
4347 c_parser_asm_clobbers (c_parser
*parser
)
4349 tree list
= NULL_TREE
;
4352 tree str
= c_parser_asm_string_literal (parser
);
4354 list
= tree_cons (NULL_TREE
, str
, list
);
4357 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4358 c_parser_consume_token (parser
);
4365 /* Parse an expression other than a compound expression; that is, an
4366 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4367 NULL then it is an Objective-C message expression which is the
4368 primary-expression starting the expression as an initializer.
4370 assignment-expression:
4371 conditional-expression
4372 unary-expression assignment-operator assignment-expression
4374 assignment-operator: one of
4375 = *= /= %= += -= <<= >>= &= ^= |=
4377 In GNU C we accept any conditional expression on the LHS and
4378 diagnose the invalid lvalue rather than producing a syntax
4381 static struct c_expr
4382 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4384 struct c_expr lhs
, rhs
, ret
;
4385 enum tree_code code
;
4386 location_t op_location
;
4387 gcc_assert (!after
|| c_dialect_objc ());
4388 lhs
= c_parser_conditional_expression (parser
, after
);
4389 op_location
= c_parser_peek_token (parser
)->location
;
4390 switch (c_parser_peek_token (parser
)->type
)
4399 code
= TRUNC_DIV_EXPR
;
4402 code
= TRUNC_MOD_EXPR
;
4417 code
= BIT_AND_EXPR
;
4420 code
= BIT_XOR_EXPR
;
4423 code
= BIT_IOR_EXPR
;
4428 c_parser_consume_token (parser
);
4429 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4430 rhs
= default_function_array_conversion (rhs
);
4431 ret
.value
= build_modify_expr (op_location
, lhs
.value
, code
, rhs
.value
);
4432 if (code
== NOP_EXPR
)
4433 ret
.original_code
= MODIFY_EXPR
;
4436 TREE_NO_WARNING (ret
.value
) = 1;
4437 ret
.original_code
= ERROR_MARK
;
4442 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4443 is not NULL then it is an Objective-C message expression which is
4444 the primary-expression starting the expression as an initializer.
4446 conditional-expression:
4447 logical-OR-expression
4448 logical-OR-expression ? expression : conditional-expression
4452 conditional-expression:
4453 logical-OR-expression ? : conditional-expression
4456 static struct c_expr
4457 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4459 struct c_expr cond
, exp1
, exp2
, ret
;
4460 location_t cond_loc
;
4462 gcc_assert (!after
|| c_dialect_objc ());
4464 cond_loc
= c_parser_peek_token (parser
)->location
;
4465 cond
= c_parser_binary_expression (parser
, after
);
4466 protected_set_expr_location (cond
.value
, cond_loc
);
4468 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4470 cond
= default_function_array_conversion (cond
);
4471 c_parser_consume_token (parser
);
4472 if (c_parser_next_token_is (parser
, CPP_COLON
))
4474 tree eptype
= NULL_TREE
;
4475 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
4476 "ISO C forbids omitting the middle term of a ?: expression");
4477 if (TREE_CODE (cond
.value
) == EXCESS_PRECISION_EXPR
)
4479 eptype
= TREE_TYPE (cond
.value
);
4480 cond
.value
= TREE_OPERAND (cond
.value
, 0);
4482 /* Make sure first operand is calculated only once. */
4483 exp1
.value
= c_save_expr (default_conversion (cond
.value
));
4485 exp1
.value
= build1 (EXCESS_PRECISION_EXPR
, eptype
, exp1
.value
);
4486 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
4487 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4492 = c_objc_common_truthvalue_conversion
4493 (cond_loc
, default_conversion (cond
.value
));
4494 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4495 exp1
= c_parser_expression_conv (parser
);
4496 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4497 - (cond
.value
== truthvalue_false_node
));
4499 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4501 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4502 ret
.value
= error_mark_node
;
4503 ret
.original_code
= ERROR_MARK
;
4506 exp2
= c_parser_conditional_expression (parser
, NULL
);
4507 exp2
= default_function_array_conversion (exp2
);
4508 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4509 ret
.value
= build_conditional_expr (cond
.value
,
4510 cond
.original_code
== C_MAYBE_CONST_EXPR
,
4511 exp1
.value
, exp2
.value
);
4512 ret
.original_code
= ERROR_MARK
;
4516 /* Parse a binary expression; that is, a logical-OR-expression (C90
4517 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4518 an Objective-C message expression which is the primary-expression
4519 starting the expression as an initializer.
4521 multiplicative-expression:
4523 multiplicative-expression * cast-expression
4524 multiplicative-expression / cast-expression
4525 multiplicative-expression % cast-expression
4527 additive-expression:
4528 multiplicative-expression
4529 additive-expression + multiplicative-expression
4530 additive-expression - multiplicative-expression
4534 shift-expression << additive-expression
4535 shift-expression >> additive-expression
4537 relational-expression:
4539 relational-expression < shift-expression
4540 relational-expression > shift-expression
4541 relational-expression <= shift-expression
4542 relational-expression >= shift-expression
4544 equality-expression:
4545 relational-expression
4546 equality-expression == relational-expression
4547 equality-expression != relational-expression
4551 AND-expression & equality-expression
4553 exclusive-OR-expression:
4555 exclusive-OR-expression ^ AND-expression
4557 inclusive-OR-expression:
4558 exclusive-OR-expression
4559 inclusive-OR-expression | exclusive-OR-expression
4561 logical-AND-expression:
4562 inclusive-OR-expression
4563 logical-AND-expression && inclusive-OR-expression
4565 logical-OR-expression:
4566 logical-AND-expression
4567 logical-OR-expression || logical-AND-expression
4570 static struct c_expr
4571 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4573 /* A binary expression is parsed using operator-precedence parsing,
4574 with the operands being cast expressions. All the binary
4575 operators are left-associative. Thus a binary expression is of
4578 E0 op1 E1 op2 E2 ...
4580 which we represent on a stack. On the stack, the precedence
4581 levels are strictly increasing. When a new operator is
4582 encountered of higher precedence than that at the top of the
4583 stack, it is pushed; its LHS is the top expression, and its RHS
4584 is everything parsed until it is popped. When a new operator is
4585 encountered with precedence less than or equal to that at the top
4586 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4587 by the result of the operation until the operator at the top of
4588 the stack has lower precedence than the new operator or there is
4589 only one element on the stack; then the top expression is the LHS
4590 of the new operator. In the case of logical AND and OR
4591 expressions, we also need to adjust skip_evaluation as
4592 appropriate when the operators are pushed and popped. */
4594 /* The precedence levels, where 0 is a dummy lowest level used for
4595 the bottom of the stack. */
4611 /* The expression at this stack level. */
4613 /* The precedence of the operator on its left, PREC_NONE at the
4614 bottom of the stack. */
4616 /* The operation on its left. */
4620 /* Location of the binary operator. */
4621 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
4624 switch (stack[sp].op) \
4626 case TRUTH_ANDIF_EXPR: \
4627 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4629 case TRUTH_ORIF_EXPR: \
4630 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4635 stack[sp - 1].expr \
4636 = default_function_array_conversion (stack[sp - 1].expr); \
4638 = default_function_array_conversion (stack[sp].expr); \
4639 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4641 stack[sp - 1].expr, \
4645 gcc_assert (!after
|| c_dialect_objc ());
4646 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4647 stack
[0].prec
= PREC_NONE
;
4652 enum tree_code ocode
;
4655 switch (c_parser_peek_token (parser
)->type
)
4663 ocode
= TRUNC_DIV_EXPR
;
4667 ocode
= TRUNC_MOD_EXPR
;
4679 ocode
= LSHIFT_EXPR
;
4683 ocode
= RSHIFT_EXPR
;
4697 case CPP_GREATER_EQ
:
4710 oprec
= PREC_BITAND
;
4711 ocode
= BIT_AND_EXPR
;
4714 oprec
= PREC_BITXOR
;
4715 ocode
= BIT_XOR_EXPR
;
4719 ocode
= BIT_IOR_EXPR
;
4722 oprec
= PREC_LOGAND
;
4723 ocode
= TRUTH_ANDIF_EXPR
;
4727 ocode
= TRUTH_ORIF_EXPR
;
4730 /* Not a binary operator, so end of the binary
4734 binary_loc
= c_parser_peek_token (parser
)->location
;
4735 c_parser_consume_token (parser
);
4736 while (oprec
<= stack
[sp
].prec
)
4740 case TRUTH_ANDIF_EXPR
:
4742 = default_function_array_conversion (stack
[sp
].expr
);
4743 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4744 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4745 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4747 case TRUTH_ORIF_EXPR
:
4749 = default_function_array_conversion (stack
[sp
].expr
);
4750 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4751 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4752 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4758 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4759 stack
[sp
].prec
= oprec
;
4760 stack
[sp
].op
= ocode
;
4765 return stack
[0].expr
;
4769 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4770 NULL then it is an Objective-C message expression which is the
4771 primary-expression starting the expression as an initializer.
4775 ( type-name ) unary-expression
4778 static struct c_expr
4779 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4781 gcc_assert (!after
|| c_dialect_objc ());
4783 return c_parser_postfix_expression_after_primary (parser
, *after
);
4784 /* If the expression begins with a parenthesized type name, it may
4785 be either a cast or a compound literal; we need to see whether
4786 the next character is '{' to tell the difference. If not, it is
4787 an unary expression. */
4788 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4789 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4791 struct c_type_name
*type_name
;
4794 c_parser_consume_token (parser
);
4795 type_name
= c_parser_type_name (parser
);
4796 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4797 if (type_name
== NULL
)
4799 ret
.value
= error_mark_node
;
4800 ret
.original_code
= ERROR_MARK
;
4804 /* Save casted types in the function's used types hash table. */
4805 used_types_insert (type_name
->specs
->type
);
4807 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4808 return c_parser_postfix_expression_after_paren_type (parser
,
4810 expr
= c_parser_cast_expression (parser
, NULL
);
4811 expr
= default_function_array_conversion (expr
);
4812 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4813 ret
.original_code
= ERROR_MARK
;
4817 return c_parser_unary_expression (parser
);
4820 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4826 unary-operator cast-expression
4827 sizeof unary-expression
4828 sizeof ( type-name )
4830 unary-operator: one of
4836 __alignof__ unary-expression
4837 __alignof__ ( type-name )
4840 unary-operator: one of
4841 __extension__ __real__ __imag__
4843 In addition, the GNU syntax treats ++ and -- as unary operators, so
4844 they may be applied to cast expressions with errors for non-lvalues
4847 static struct c_expr
4848 c_parser_unary_expression (c_parser
*parser
)
4851 struct c_expr ret
, op
;
4852 location_t loc
= c_parser_peek_token (parser
)->location
;
4853 switch (c_parser_peek_token (parser
)->type
)
4856 c_parser_consume_token (parser
);
4857 op
= c_parser_cast_expression (parser
, NULL
);
4858 op
= default_function_array_conversion (op
);
4859 return parser_build_unary_op (PREINCREMENT_EXPR
, op
, loc
);
4860 case CPP_MINUS_MINUS
:
4861 c_parser_consume_token (parser
);
4862 op
= c_parser_cast_expression (parser
, NULL
);
4863 op
= default_function_array_conversion (op
);
4864 return parser_build_unary_op (PREDECREMENT_EXPR
, op
, loc
);
4866 c_parser_consume_token (parser
);
4867 return parser_build_unary_op (ADDR_EXPR
,
4868 c_parser_cast_expression (parser
, NULL
),
4871 c_parser_consume_token (parser
);
4872 op
= c_parser_cast_expression (parser
, NULL
);
4873 op
= default_function_array_conversion (op
);
4874 ret
.value
= build_indirect_ref (loc
, op
.value
, "unary *");
4875 ret
.original_code
= ERROR_MARK
;
4878 if (!c_dialect_objc () && !in_system_header
)
4879 warning_at (c_parser_peek_token (parser
)->location
,
4881 "traditional C rejects the unary plus operator");
4882 c_parser_consume_token (parser
);
4883 op
= c_parser_cast_expression (parser
, NULL
);
4884 op
= default_function_array_conversion (op
);
4885 return parser_build_unary_op (CONVERT_EXPR
, op
, loc
);
4887 c_parser_consume_token (parser
);
4888 op
= c_parser_cast_expression (parser
, NULL
);
4889 op
= default_function_array_conversion (op
);
4890 return parser_build_unary_op (NEGATE_EXPR
, op
, loc
);
4892 c_parser_consume_token (parser
);
4893 op
= c_parser_cast_expression (parser
, NULL
);
4894 op
= default_function_array_conversion (op
);
4895 return parser_build_unary_op (BIT_NOT_EXPR
, op
, loc
);
4897 c_parser_consume_token (parser
);
4898 op
= c_parser_cast_expression (parser
, NULL
);
4899 op
= default_function_array_conversion (op
);
4900 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
, loc
);
4902 /* Refer to the address of a label as a pointer. */
4903 c_parser_consume_token (parser
);
4904 if (c_parser_next_token_is (parser
, CPP_NAME
))
4906 ret
.value
= finish_label_address_expr
4907 (c_parser_peek_token (parser
)->value
, loc
);
4908 c_parser_consume_token (parser
);
4912 c_parser_error (parser
, "expected identifier");
4913 ret
.value
= error_mark_node
;
4915 ret
.original_code
= ERROR_MARK
;
4918 switch (c_parser_peek_token (parser
)->keyword
)
4921 return c_parser_sizeof_expression (parser
);
4923 return c_parser_alignof_expression (parser
);
4925 c_parser_consume_token (parser
);
4926 ext
= disable_extension_diagnostics ();
4927 ret
= c_parser_cast_expression (parser
, NULL
);
4928 restore_extension_diagnostics (ext
);
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 (REALPART_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 (IMAGPART_EXPR
, op
, loc
);
4941 return c_parser_postfix_expression (parser
);
4944 return c_parser_postfix_expression (parser
);
4948 /* Parse a sizeof expression. */
4950 static struct c_expr
4951 c_parser_sizeof_expression (c_parser
*parser
)
4954 location_t expr_loc
;
4955 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4956 c_parser_consume_token (parser
);
4959 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4960 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4962 /* Either sizeof ( type-name ) or sizeof unary-expression
4963 starting with a compound literal. */
4964 struct c_type_name
*type_name
;
4965 c_parser_consume_token (parser
);
4966 expr_loc
= c_parser_peek_token (parser
)->location
;
4967 type_name
= c_parser_type_name (parser
);
4968 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4969 if (type_name
== NULL
)
4974 ret
.value
= error_mark_node
;
4975 ret
.original_code
= ERROR_MARK
;
4978 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4980 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4984 /* sizeof ( type-name ). */
4987 return c_expr_sizeof_type (type_name
);
4991 expr_loc
= c_parser_peek_token (parser
)->location
;
4992 expr
= c_parser_unary_expression (parser
);
4996 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4997 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4998 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
4999 return c_expr_sizeof_expr (expr
);
5003 /* Parse an alignof expression. */
5005 static struct c_expr
5006 c_parser_alignof_expression (c_parser
*parser
)
5009 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
5010 c_parser_consume_token (parser
);
5013 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
5014 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5016 /* Either __alignof__ ( type-name ) or __alignof__
5017 unary-expression starting with a compound literal. */
5018 struct c_type_name
*type_name
;
5020 c_parser_consume_token (parser
);
5021 type_name
= c_parser_type_name (parser
);
5022 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5023 if (type_name
== NULL
)
5028 ret
.value
= error_mark_node
;
5029 ret
.original_code
= ERROR_MARK
;
5032 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5034 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5038 /* alignof ( type-name ). */
5041 ret
.value
= c_alignof (groktypename (type_name
, NULL
, NULL
));
5042 ret
.original_code
= ERROR_MARK
;
5048 expr
= c_parser_unary_expression (parser
);
5052 ret
.value
= c_alignof_expr (expr
.value
);
5053 ret
.original_code
= ERROR_MARK
;
5058 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5062 postfix-expression [ expression ]
5063 postfix-expression ( argument-expression-list[opt] )
5064 postfix-expression . identifier
5065 postfix-expression -> identifier
5066 postfix-expression ++
5067 postfix-expression --
5068 ( type-name ) { initializer-list }
5069 ( type-name ) { initializer-list , }
5071 argument-expression-list:
5073 argument-expression-list , argument-expression
5085 (treated as a keyword in GNU C)
5088 ( compound-statement )
5089 __builtin_va_arg ( assignment-expression , type-name )
5090 __builtin_offsetof ( type-name , offsetof-member-designator )
5091 __builtin_choose_expr ( assignment-expression ,
5092 assignment-expression ,
5093 assignment-expression )
5094 __builtin_types_compatible_p ( type-name , type-name )
5096 offsetof-member-designator:
5098 offsetof-member-designator . identifier
5099 offsetof-member-designator [ expression ]
5104 [ objc-receiver objc-message-args ]
5105 @selector ( objc-selector-arg )
5106 @protocol ( identifier )
5107 @encode ( type-name )
5111 static struct c_expr
5112 c_parser_postfix_expression (c_parser
*parser
)
5114 struct c_expr expr
, e1
, e2
, e3
;
5115 struct c_type_name
*t1
, *t2
;
5117 switch (c_parser_peek_token (parser
)->type
)
5120 expr
.value
= c_parser_peek_token (parser
)->value
;
5121 expr
.original_code
= ERROR_MARK
;
5122 loc
= c_parser_peek_token (parser
)->location
;
5123 c_parser_consume_token (parser
);
5124 if (TREE_CODE (expr
.value
) == FIXED_CST
5125 && !targetm
.fixed_point_supported_p ())
5127 error_at (loc
, "fixed-point types not supported for this target");
5128 expr
.value
= error_mark_node
;
5135 expr
.value
= c_parser_peek_token (parser
)->value
;
5136 expr
.original_code
= ERROR_MARK
;
5137 c_parser_consume_token (parser
);
5143 expr
.value
= c_parser_peek_token (parser
)->value
;
5144 expr
.original_code
= STRING_CST
;
5145 c_parser_consume_token (parser
);
5147 case CPP_OBJC_STRING
:
5148 gcc_assert (c_dialect_objc ());
5150 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5151 expr
.original_code
= ERROR_MARK
;
5152 c_parser_consume_token (parser
);
5155 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5157 c_parser_error (parser
, "expected expression");
5158 expr
.value
= error_mark_node
;
5159 expr
.original_code
= ERROR_MARK
;
5163 tree id
= c_parser_peek_token (parser
)->value
;
5164 location_t loc
= c_parser_peek_token (parser
)->location
;
5165 c_parser_consume_token (parser
);
5166 expr
.value
= build_external_ref (id
,
5167 (c_parser_peek_token (parser
)->type
5168 == CPP_OPEN_PAREN
), loc
);
5169 expr
.original_code
= ERROR_MARK
;
5172 case CPP_OPEN_PAREN
:
5173 /* A parenthesized expression, statement expression or compound
5175 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5177 /* A statement expression. */
5179 location_t here
= c_parser_peek_token (parser
)->location
;
5180 c_parser_consume_token (parser
);
5181 c_parser_consume_token (parser
);
5182 if (cur_stmt_list
== NULL
)
5184 error_at (here
, "braced-group within expression allowed "
5185 "only inside a function");
5186 parser
->error
= true;
5187 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5188 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5189 expr
.value
= error_mark_node
;
5190 expr
.original_code
= ERROR_MARK
;
5193 stmt
= c_begin_stmt_expr ();
5194 c_parser_compound_statement_nostart (parser
);
5195 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5197 pedwarn (here
, OPT_pedantic
,
5198 "ISO C forbids braced-groups within expressions");
5199 expr
.value
= c_finish_stmt_expr (stmt
);
5200 expr
.original_code
= ERROR_MARK
;
5202 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5204 /* A compound literal. ??? Can we actually get here rather
5205 than going directly to
5206 c_parser_postfix_expression_after_paren_type from
5208 struct c_type_name
*type_name
;
5209 c_parser_consume_token (parser
);
5210 type_name
= c_parser_type_name (parser
);
5211 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5213 if (type_name
== NULL
)
5215 expr
.value
= error_mark_node
;
5216 expr
.original_code
= ERROR_MARK
;
5219 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5224 /* A parenthesized expression. */
5225 c_parser_consume_token (parser
);
5226 expr
= c_parser_expression (parser
);
5227 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5228 TREE_NO_WARNING (expr
.value
) = 1;
5229 if (expr
.original_code
!= C_MAYBE_CONST_EXPR
)
5230 expr
.original_code
= ERROR_MARK
;
5231 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5236 switch (c_parser_peek_token (parser
)->keyword
)
5238 case RID_FUNCTION_NAME
:
5239 case RID_PRETTY_FUNCTION_NAME
:
5240 case RID_C99_FUNCTION_NAME
:
5241 expr
.value
= fname_decl (c_parser_peek_token (parser
)->location
,
5242 c_parser_peek_token (parser
)->keyword
,
5243 c_parser_peek_token (parser
)->value
);
5244 expr
.original_code
= ERROR_MARK
;
5245 c_parser_consume_token (parser
);
5248 c_parser_consume_token (parser
);
5249 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5251 expr
.value
= error_mark_node
;
5252 expr
.original_code
= ERROR_MARK
;
5255 e1
= c_parser_expr_no_commas (parser
, NULL
);
5256 e1
.value
= c_fully_fold (e1
.value
, false, NULL
);
5257 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5259 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5260 expr
.value
= error_mark_node
;
5261 expr
.original_code
= ERROR_MARK
;
5264 t1
= c_parser_type_name (parser
);
5265 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5269 expr
.value
= error_mark_node
;
5270 expr
.original_code
= ERROR_MARK
;
5274 tree type_expr
= NULL_TREE
;
5275 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
,
5280 expr
.value
= build2 (C_MAYBE_CONST_EXPR
,
5281 TREE_TYPE (expr
.value
), type_expr
,
5283 C_MAYBE_CONST_EXPR_NON_CONST (expr
.value
) = true;
5285 expr
.original_code
= ERROR_MARK
;
5289 c_parser_consume_token (parser
);
5290 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5292 expr
.value
= error_mark_node
;
5293 expr
.original_code
= ERROR_MARK
;
5296 t1
= c_parser_type_name (parser
);
5299 expr
.value
= error_mark_node
;
5300 expr
.original_code
= ERROR_MARK
;
5303 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5305 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5306 expr
.value
= error_mark_node
;
5307 expr
.original_code
= ERROR_MARK
;
5311 tree type
= groktypename (t1
, NULL
, NULL
);
5313 if (type
== error_mark_node
)
5314 offsetof_ref
= error_mark_node
;
5316 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5317 /* Parse the second argument to __builtin_offsetof. We
5318 must have one identifier, and beyond that we want to
5319 accept sub structure and sub array references. */
5320 if (c_parser_next_token_is (parser
, CPP_NAME
))
5322 offsetof_ref
= build_component_ref
5323 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5324 c_parser_consume_token (parser
);
5325 while (c_parser_next_token_is (parser
, CPP_DOT
)
5326 || c_parser_next_token_is (parser
,
5328 || c_parser_next_token_is (parser
,
5331 if (c_parser_next_token_is (parser
, CPP_DEREF
))
5333 loc
= c_parser_peek_token (parser
)->location
;
5334 offsetof_ref
= build_array_ref (offsetof_ref
,
5339 else if (c_parser_next_token_is (parser
, CPP_DOT
))
5342 c_parser_consume_token (parser
);
5343 if (c_parser_next_token_is_not (parser
,
5346 c_parser_error (parser
, "expected identifier");
5349 offsetof_ref
= build_component_ref
5351 c_parser_peek_token (parser
)->value
);
5352 c_parser_consume_token (parser
);
5357 loc
= c_parser_peek_token (parser
)->location
;
5358 c_parser_consume_token (parser
);
5359 idx
= c_parser_expression (parser
).value
;
5360 idx
= c_fully_fold (idx
, false, NULL
);
5361 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5363 offsetof_ref
= build_array_ref (offsetof_ref
, idx
, loc
);
5368 c_parser_error (parser
, "expected identifier");
5369 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5371 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5372 expr
.original_code
= ERROR_MARK
;
5375 case RID_CHOOSE_EXPR
:
5376 c_parser_consume_token (parser
);
5377 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5379 expr
.value
= error_mark_node
;
5380 expr
.original_code
= ERROR_MARK
;
5383 loc
= c_parser_peek_token (parser
)->location
;
5384 e1
= c_parser_expr_no_commas (parser
, NULL
);
5385 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5387 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5388 expr
.value
= error_mark_node
;
5389 expr
.original_code
= ERROR_MARK
;
5392 e2
= c_parser_expr_no_commas (parser
, NULL
);
5393 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5395 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5396 expr
.value
= error_mark_node
;
5397 expr
.original_code
= ERROR_MARK
;
5400 e3
= c_parser_expr_no_commas (parser
, NULL
);
5401 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5406 c
= fold (e1
.value
);
5407 if (TREE_CODE (c
) != INTEGER_CST
5408 || !INTEGRAL_TYPE_P (TREE_TYPE (c
)))
5410 "first argument to %<__builtin_choose_expr%> not"
5412 constant_expression_warning (c
);
5413 expr
= integer_zerop (c
) ? e3
: e2
;
5416 case RID_TYPES_COMPATIBLE_P
:
5417 c_parser_consume_token (parser
);
5418 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5420 expr
.value
= error_mark_node
;
5421 expr
.original_code
= ERROR_MARK
;
5424 t1
= c_parser_type_name (parser
);
5427 expr
.value
= error_mark_node
;
5428 expr
.original_code
= ERROR_MARK
;
5431 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5433 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5434 expr
.value
= error_mark_node
;
5435 expr
.original_code
= ERROR_MARK
;
5438 t2
= c_parser_type_name (parser
);
5441 expr
.value
= error_mark_node
;
5442 expr
.original_code
= ERROR_MARK
;
5445 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5450 e1
= TYPE_MAIN_VARIANT (groktypename (t1
, NULL
, NULL
));
5451 e2
= TYPE_MAIN_VARIANT (groktypename (t2
, NULL
, NULL
));
5453 expr
.value
= comptypes (e1
, e2
)
5454 ? build_int_cst (NULL_TREE
, 1)
5455 : build_int_cst (NULL_TREE
, 0);
5456 expr
.original_code
= ERROR_MARK
;
5459 case RID_AT_SELECTOR
:
5460 gcc_assert (c_dialect_objc ());
5461 c_parser_consume_token (parser
);
5462 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5464 expr
.value
= error_mark_node
;
5465 expr
.original_code
= ERROR_MARK
;
5469 tree sel
= c_parser_objc_selector_arg (parser
);
5470 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5472 expr
.value
= objc_build_selector_expr (sel
);
5473 expr
.original_code
= ERROR_MARK
;
5476 case RID_AT_PROTOCOL
:
5477 gcc_assert (c_dialect_objc ());
5478 c_parser_consume_token (parser
);
5479 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5481 expr
.value
= error_mark_node
;
5482 expr
.original_code
= ERROR_MARK
;
5485 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5487 c_parser_error (parser
, "expected identifier");
5488 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5489 expr
.value
= error_mark_node
;
5490 expr
.original_code
= ERROR_MARK
;
5494 tree id
= c_parser_peek_token (parser
)->value
;
5495 c_parser_consume_token (parser
);
5496 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5498 expr
.value
= objc_build_protocol_expr (id
);
5499 expr
.original_code
= ERROR_MARK
;
5503 /* Extension to support C-structures in the archiver. */
5504 gcc_assert (c_dialect_objc ());
5505 c_parser_consume_token (parser
);
5506 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5508 expr
.value
= error_mark_node
;
5509 expr
.original_code
= ERROR_MARK
;
5512 t1
= c_parser_type_name (parser
);
5515 expr
.value
= error_mark_node
;
5516 expr
.original_code
= ERROR_MARK
;
5517 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5520 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5523 tree type
= groktypename (t1
, NULL
, NULL
);
5524 expr
.value
= objc_build_encode_expr (type
);
5525 expr
.original_code
= ERROR_MARK
;
5529 c_parser_error (parser
, "expected expression");
5530 expr
.value
= error_mark_node
;
5531 expr
.original_code
= ERROR_MARK
;
5535 case CPP_OPEN_SQUARE
:
5536 if (c_dialect_objc ())
5538 tree receiver
, args
;
5539 c_parser_consume_token (parser
);
5540 receiver
= c_parser_objc_receiver (parser
);
5541 args
= c_parser_objc_message_args (parser
);
5542 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5544 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5546 expr
.original_code
= ERROR_MARK
;
5549 /* Else fall through to report error. */
5551 c_parser_error (parser
, "expected expression");
5552 expr
.value
= error_mark_node
;
5553 expr
.original_code
= ERROR_MARK
;
5556 return c_parser_postfix_expression_after_primary (parser
, expr
);
5559 /* Parse a postfix expression after a parenthesized type name: the
5560 brace-enclosed initializer of a compound literal, possibly followed
5561 by some postfix operators. This is separate because it is not
5562 possible to tell until after the type name whether a cast
5563 expression has a cast or a compound literal, or whether the operand
5564 of sizeof is a parenthesized type name or starts with a compound
5567 static struct c_expr
5568 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5569 struct c_type_name
*type_name
)
5575 location_t start_loc
;
5576 tree type_expr
= NULL_TREE
;
5577 bool type_expr_const
= true;
5578 start_init (NULL_TREE
, NULL
, 0);
5579 type
= groktypename (type_name
, &type_expr
, &type_expr_const
);
5580 start_loc
= c_parser_peek_token (parser
)->location
;
5581 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5583 error_at (start_loc
, "compound literal has variable size");
5584 type
= error_mark_node
;
5586 init
= c_parser_braced_init (parser
, type
, false);
5588 maybe_warn_string_init (type
, init
);
5591 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
5592 non_const
= ((init
.value
&& TREE_CODE (init
.value
) == CONSTRUCTOR
)
5593 ? CONSTRUCTOR_NON_CONST (init
.value
)
5594 : init
.original_code
== C_MAYBE_CONST_EXPR
);
5595 non_const
|= !type_expr_const
;
5596 expr
.value
= build_compound_literal (type
, init
.value
, non_const
);
5597 expr
.original_code
= ERROR_MARK
;
5600 if (TREE_CODE (expr
.value
) == C_MAYBE_CONST_EXPR
)
5602 gcc_assert (C_MAYBE_CONST_EXPR_PRE (expr
.value
) == NULL_TREE
);
5603 C_MAYBE_CONST_EXPR_PRE (expr
.value
) = type_expr
;
5607 gcc_assert (!non_const
);
5608 expr
.value
= build2 (C_MAYBE_CONST_EXPR
, type
,
5609 type_expr
, expr
.value
);
5612 return c_parser_postfix_expression_after_primary (parser
, expr
);
5615 /* Parse a postfix expression after the initial primary or compound
5616 literal; that is, parse a series of postfix operators. */
5618 static struct c_expr
5619 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5622 struct c_expr orig_expr
;
5623 tree ident
, idx
, exprlist
;
5624 location_t loc
= c_parser_peek_token (parser
)->location
;
5627 switch (c_parser_peek_token (parser
)->type
)
5629 case CPP_OPEN_SQUARE
:
5630 /* Array reference. */
5631 loc
= c_parser_peek_token (parser
)->location
;
5632 c_parser_consume_token (parser
);
5633 idx
= c_parser_expression (parser
).value
;
5634 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5636 expr
.value
= build_array_ref (expr
.value
, idx
, loc
);
5637 expr
.original_code
= ERROR_MARK
;
5639 case CPP_OPEN_PAREN
:
5640 /* Function call. */
5641 c_parser_consume_token (parser
);
5642 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5643 exprlist
= NULL_TREE
;
5645 exprlist
= c_parser_expr_list (parser
, true, false);
5646 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5649 expr
.value
= build_function_call (expr
.value
, exprlist
);
5650 expr
.original_code
= ERROR_MARK
;
5651 if (TREE_CODE (expr
.value
) == INTEGER_CST
5652 && TREE_CODE (orig_expr
.value
) == FUNCTION_DECL
5653 && DECL_BUILT_IN_CLASS (orig_expr
.value
) == BUILT_IN_NORMAL
5654 && DECL_FUNCTION_CODE (orig_expr
.value
) == BUILT_IN_CONSTANT_P
)
5655 expr
.original_code
= C_MAYBE_CONST_EXPR
;
5658 /* Structure element reference. */
5659 c_parser_consume_token (parser
);
5660 expr
= default_function_array_conversion (expr
);
5661 if (c_parser_next_token_is (parser
, CPP_NAME
))
5662 ident
= c_parser_peek_token (parser
)->value
;
5665 c_parser_error (parser
, "expected identifier");
5666 expr
.value
= error_mark_node
;
5667 expr
.original_code
= ERROR_MARK
;
5670 c_parser_consume_token (parser
);
5671 expr
.value
= build_component_ref (expr
.value
, ident
);
5672 expr
.original_code
= ERROR_MARK
;
5675 /* Structure element reference. */
5676 c_parser_consume_token (parser
);
5677 expr
= default_function_array_conversion (expr
);
5678 if (c_parser_next_token_is (parser
, CPP_NAME
))
5679 ident
= c_parser_peek_token (parser
)->value
;
5682 c_parser_error (parser
, "expected identifier");
5683 expr
.value
= error_mark_node
;
5684 expr
.original_code
= ERROR_MARK
;
5687 c_parser_consume_token (parser
);
5688 expr
.value
= build_component_ref (build_indirect_ref (loc
,
5692 expr
.original_code
= ERROR_MARK
;
5695 /* Postincrement. */
5696 c_parser_consume_token (parser
);
5697 expr
= default_function_array_conversion (expr
);
5698 expr
.value
= build_unary_op (loc
,
5699 POSTINCREMENT_EXPR
, expr
.value
, 0);
5700 expr
.original_code
= ERROR_MARK
;
5702 case CPP_MINUS_MINUS
:
5703 /* Postdecrement. */
5704 c_parser_consume_token (parser
);
5705 expr
= default_function_array_conversion (expr
);
5706 expr
.value
= build_unary_op (loc
,
5707 POSTDECREMENT_EXPR
, expr
.value
, 0);
5708 expr
.original_code
= ERROR_MARK
;
5716 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5719 assignment-expression
5720 expression , assignment-expression
5723 static struct c_expr
5724 c_parser_expression (c_parser
*parser
)
5727 expr
= c_parser_expr_no_commas (parser
, NULL
);
5728 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5731 c_parser_consume_token (parser
);
5732 next
= c_parser_expr_no_commas (parser
, NULL
);
5733 next
= default_function_array_conversion (next
);
5734 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5735 expr
.original_code
= COMPOUND_EXPR
;
5740 /* Parse an expression and convert functions or arrays to
5743 static struct c_expr
5744 c_parser_expression_conv (c_parser
*parser
)
5747 expr
= c_parser_expression (parser
);
5748 expr
= default_function_array_conversion (expr
);
5752 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5753 functions and arrays to pointers. If FOLD_P, fold the expressions.
5756 assignment-expression
5757 nonempty-expr-list , assignment-expression
5761 c_parser_expr_list (c_parser
*parser
, bool convert_p
, bool fold_p
)
5765 expr
= c_parser_expr_no_commas (parser
, NULL
);
5767 expr
= default_function_array_conversion (expr
);
5769 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5770 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5771 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5773 c_parser_consume_token (parser
);
5774 expr
= c_parser_expr_no_commas (parser
, NULL
);
5776 expr
= default_function_array_conversion (expr
);
5778 expr
.value
= c_fully_fold (expr
.value
, false, NULL
);
5779 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5785 /* Parse Objective-C-specific constructs. */
5787 /* Parse an objc-class-definition.
5789 objc-class-definition:
5790 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5791 objc-class-instance-variables[opt] objc-methodprotolist @end
5792 @implementation identifier objc-superclass[opt]
5793 objc-class-instance-variables[opt]
5794 @interface identifier ( identifier ) objc-protocol-refs[opt]
5795 objc-methodprotolist @end
5796 @implementation identifier ( identifier )
5801 "@interface identifier (" must start "@interface identifier (
5802 identifier ) ...": objc-methodprotolist in the first production may
5803 not start with a parenthesized identifier as a declarator of a data
5804 definition with no declaration specifiers if the objc-superclass,
5805 objc-protocol-refs and objc-class-instance-variables are omitted. */
5808 c_parser_objc_class_definition (c_parser
*parser
)
5813 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5815 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5819 c_parser_consume_token (parser
);
5820 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5822 c_parser_error (parser
, "expected identifier");
5825 id1
= c_parser_peek_token (parser
)->value
;
5826 c_parser_consume_token (parser
);
5827 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5830 tree proto
= NULL_TREE
;
5831 c_parser_consume_token (parser
);
5832 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5834 c_parser_error (parser
, "expected identifier");
5835 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5838 id2
= c_parser_peek_token (parser
)->value
;
5839 c_parser_consume_token (parser
);
5840 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5843 objc_start_category_implementation (id1
, id2
);
5846 if (c_parser_next_token_is (parser
, CPP_LESS
))
5847 proto
= c_parser_objc_protocol_refs (parser
);
5848 objc_start_category_interface (id1
, id2
, proto
);
5849 c_parser_objc_methodprotolist (parser
);
5850 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5851 objc_finish_interface ();
5854 if (c_parser_next_token_is (parser
, CPP_COLON
))
5856 c_parser_consume_token (parser
);
5857 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5859 c_parser_error (parser
, "expected identifier");
5862 superclass
= c_parser_peek_token (parser
)->value
;
5863 c_parser_consume_token (parser
);
5866 superclass
= NULL_TREE
;
5869 tree proto
= NULL_TREE
;
5870 if (c_parser_next_token_is (parser
, CPP_LESS
))
5871 proto
= c_parser_objc_protocol_refs (parser
);
5872 objc_start_class_interface (id1
, superclass
, proto
);
5875 objc_start_class_implementation (id1
, superclass
);
5876 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5877 c_parser_objc_class_instance_variables (parser
);
5880 objc_continue_interface ();
5881 c_parser_objc_methodprotolist (parser
);
5882 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5883 objc_finish_interface ();
5887 objc_continue_implementation ();
5892 /* Parse objc-class-instance-variables.
5894 objc-class-instance-variables:
5895 { objc-instance-variable-decl-list[opt] }
5897 objc-instance-variable-decl-list:
5898 objc-visibility-spec
5899 objc-instance-variable-decl ;
5901 objc-instance-variable-decl-list objc-visibility-spec
5902 objc-instance-variable-decl-list objc-instance-variable-decl ;
5903 objc-instance-variable-decl-list ;
5905 objc-visibility-spec:
5910 objc-instance-variable-decl:
5915 c_parser_objc_class_instance_variables (c_parser
*parser
)
5917 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5918 c_parser_consume_token (parser
);
5919 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5922 /* Parse any stray semicolon. */
5923 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5925 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
5926 "extra semicolon in struct or union specified");
5927 c_parser_consume_token (parser
);
5930 /* Stop if at the end of the instance variables. */
5931 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5933 c_parser_consume_token (parser
);
5936 /* Parse any objc-visibility-spec. */
5937 if (c_parser_next_token_is_keyword (parser
, RID_PRIVATE
))
5939 c_parser_consume_token (parser
);
5940 objc_set_visibility (2);
5943 else if (c_parser_next_token_is_keyword (parser
, RID_PROTECTED
))
5945 c_parser_consume_token (parser
);
5946 objc_set_visibility (0);
5949 else if (c_parser_next_token_is_keyword (parser
, RID_PUBLIC
))
5951 c_parser_consume_token (parser
);
5952 objc_set_visibility (1);
5955 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5957 c_parser_pragma (parser
, pragma_external
);
5961 /* Parse some comma-separated declarations. */
5962 decls
= c_parser_struct_declaration (parser
);
5964 /* Comma-separated instance variables are chained together in
5965 reverse order; add them one by one. */
5966 tree ivar
= nreverse (decls
);
5967 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5968 objc_add_instance_variable (copy_node (ivar
));
5970 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5974 /* Parse an objc-class-declaration.
5976 objc-class-declaration:
5977 @class identifier-list ;
5981 c_parser_objc_class_declaration (c_parser
*parser
)
5983 tree list
= NULL_TREE
;
5984 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_CLASS
));
5985 c_parser_consume_token (parser
);
5986 /* Any identifiers, including those declared as type names, are OK
5991 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5993 c_parser_error (parser
, "expected identifier");
5996 id
= c_parser_peek_token (parser
)->value
;
5997 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5998 c_parser_consume_token (parser
);
5999 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6000 c_parser_consume_token (parser
);
6004 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6005 objc_declare_class (list
);
6008 /* Parse an objc-alias-declaration.
6010 objc-alias-declaration:
6011 @compatibility_alias identifier identifier ;
6015 c_parser_objc_alias_declaration (c_parser
*parser
)
6018 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
6019 c_parser_consume_token (parser
);
6020 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6022 c_parser_error (parser
, "expected identifier");
6023 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
6026 id1
= c_parser_peek_token (parser
)->value
;
6027 c_parser_consume_token (parser
);
6028 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6030 c_parser_error (parser
, "expected identifier");
6031 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
6034 id2
= c_parser_peek_token (parser
)->value
;
6035 c_parser_consume_token (parser
);
6036 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6037 objc_declare_alias (id1
, id2
);
6040 /* Parse an objc-protocol-definition.
6042 objc-protocol-definition:
6043 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
6044 @protocol identifier-list ;
6046 "@protocol identifier ;" should be resolved as "@protocol
6047 identifier-list ;": objc-methodprotolist may not start with a
6048 semicolon in the first alternative if objc-protocol-refs are
6052 c_parser_objc_protocol_definition (c_parser
*parser
)
6054 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
6055 c_parser_consume_token (parser
);
6056 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6058 c_parser_error (parser
, "expected identifier");
6061 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
6062 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
6064 tree list
= NULL_TREE
;
6065 /* Any identifiers, including those declared as type names, are
6070 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6072 c_parser_error (parser
, "expected identifier");
6075 id
= c_parser_peek_token (parser
)->value
;
6076 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6077 c_parser_consume_token (parser
);
6078 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6079 c_parser_consume_token (parser
);
6083 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6084 objc_declare_protocols (list
);
6088 tree id
= c_parser_peek_token (parser
)->value
;
6089 tree proto
= NULL_TREE
;
6090 c_parser_consume_token (parser
);
6091 if (c_parser_next_token_is (parser
, CPP_LESS
))
6092 proto
= c_parser_objc_protocol_refs (parser
);
6093 parser
->objc_pq_context
= true;
6094 objc_start_protocol (id
, proto
);
6095 c_parser_objc_methodprotolist (parser
);
6096 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6097 parser
->objc_pq_context
= false;
6098 objc_finish_interface ();
6102 /* Parse an objc-method-type.
6109 static enum tree_code
6110 c_parser_objc_method_type (c_parser
*parser
)
6112 switch (c_parser_peek_token (parser
)->type
)
6115 c_parser_consume_token (parser
);
6118 c_parser_consume_token (parser
);
6125 /* Parse an objc-method-definition.
6127 objc-method-definition:
6128 objc-method-type objc-method-decl ;[opt] compound-statement
6132 c_parser_objc_method_definition (c_parser
*parser
)
6134 enum tree_code type
= c_parser_objc_method_type (parser
);
6136 objc_set_method_type (type
);
6137 parser
->objc_pq_context
= true;
6138 decl
= c_parser_objc_method_decl (parser
);
6139 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6141 c_parser_consume_token (parser
);
6142 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6143 "extra semicolon in method definition specified");
6145 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6147 c_parser_error (parser
, "expected %<{%>");
6150 parser
->objc_pq_context
= false;
6151 objc_start_method_definition (decl
);
6152 add_stmt (c_parser_compound_statement (parser
));
6153 objc_finish_method_definition (current_function_decl
);
6156 /* Parse an objc-methodprotolist.
6158 objc-methodprotolist:
6160 objc-methodprotolist objc-methodproto
6161 objc-methodprotolist declaration
6162 objc-methodprotolist ;
6164 The declaration is a data definition, which may be missing
6165 declaration specifiers under the same rules and diagnostics as
6166 other data definitions outside functions, and the stray semicolon
6167 is diagnosed the same way as a stray semicolon outside a
6171 c_parser_objc_methodprotolist (c_parser
*parser
)
6175 /* The list is terminated by @end. */
6176 switch (c_parser_peek_token (parser
)->type
)
6179 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6180 "ISO C does not allow extra %<;%> outside of a function");
6181 c_parser_consume_token (parser
);
6185 c_parser_objc_methodproto (parser
);
6188 c_parser_pragma (parser
, pragma_external
);
6193 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6195 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6201 /* Parse an objc-methodproto.
6204 objc-method-type objc-method-decl ;
6208 c_parser_objc_methodproto (c_parser
*parser
)
6210 enum tree_code type
= c_parser_objc_method_type (parser
);
6212 objc_set_method_type (type
);
6213 /* Remember protocol qualifiers in prototypes. */
6214 parser
->objc_pq_context
= true;
6215 decl
= c_parser_objc_method_decl (parser
);
6216 /* Forget protocol qualifiers here. */
6217 parser
->objc_pq_context
= false;
6218 objc_add_method_declaration (decl
);
6219 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6222 /* Parse an objc-method-decl.
6225 ( objc-type-name ) objc-selector
6227 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6228 objc-keyword-selector objc-optparmlist
6230 objc-keyword-selector:
6232 objc-keyword-selector objc-keyword-decl
6235 objc-selector : ( objc-type-name ) identifier
6236 objc-selector : identifier
6237 : ( objc-type-name ) identifier
6241 objc-optparms objc-optellipsis
6245 objc-opt-parms , parameter-declaration
6253 c_parser_objc_method_decl (c_parser
*parser
)
6255 tree type
= NULL_TREE
;
6257 tree parms
= NULL_TREE
;
6258 bool ellipsis
= false;
6260 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6262 c_parser_consume_token (parser
);
6263 type
= c_parser_objc_type_name (parser
);
6264 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6266 sel
= c_parser_objc_selector (parser
);
6267 /* If there is no selector, or a colon follows, we have an
6268 objc-keyword-selector. If there is a selector, and a colon does
6269 not follow, that selector ends the objc-method-decl. */
6270 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6273 tree list
= NULL_TREE
;
6276 tree atype
= NULL_TREE
, id
, keyworddecl
;
6277 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6279 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6281 c_parser_consume_token (parser
);
6282 atype
= c_parser_objc_type_name (parser
);
6283 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6286 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6288 c_parser_error (parser
, "expected identifier");
6289 return error_mark_node
;
6291 id
= c_parser_peek_token (parser
)->value
;
6292 c_parser_consume_token (parser
);
6293 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6294 list
= chainon (list
, keyworddecl
);
6295 tsel
= c_parser_objc_selector (parser
);
6296 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6299 /* Parse the optional parameter list. Optional Objective-C
6300 method parameters follow the C syntax, and may include '...'
6301 to denote a variable number of arguments. */
6302 parms
= make_node (TREE_LIST
);
6303 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6305 struct c_parm
*parm
;
6306 c_parser_consume_token (parser
);
6307 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6310 c_parser_consume_token (parser
);
6313 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6316 parms
= chainon (parms
,
6317 build_tree_list (NULL_TREE
, grokparm (parm
)));
6321 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6324 /* Parse an objc-type-name.
6327 objc-type-qualifiers[opt] type-name
6328 objc-type-qualifiers[opt]
6330 objc-type-qualifiers:
6332 objc-type-qualifiers objc-type-qualifier
6334 objc-type-qualifier: one of
6335 in out inout bycopy byref oneway
6339 c_parser_objc_type_name (c_parser
*parser
)
6341 tree quals
= NULL_TREE
;
6342 struct c_type_name
*type_name
= NULL
;
6343 tree type
= NULL_TREE
;
6346 c_token
*token
= c_parser_peek_token (parser
);
6347 if (token
->type
== CPP_KEYWORD
6348 && (token
->keyword
== RID_IN
6349 || token
->keyword
== RID_OUT
6350 || token
->keyword
== RID_INOUT
6351 || token
->keyword
== RID_BYCOPY
6352 || token
->keyword
== RID_BYREF
6353 || token
->keyword
== RID_ONEWAY
))
6355 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6356 c_parser_consume_token (parser
);
6361 if (c_parser_next_token_starts_typename (parser
))
6362 type_name
= c_parser_type_name (parser
);
6364 type
= groktypename (type_name
, NULL
, NULL
);
6365 return build_tree_list (quals
, type
);
6368 /* Parse objc-protocol-refs.
6375 c_parser_objc_protocol_refs (c_parser
*parser
)
6377 tree list
= NULL_TREE
;
6378 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6379 c_parser_consume_token (parser
);
6380 /* Any identifiers, including those declared as type names, are OK
6385 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6387 c_parser_error (parser
, "expected identifier");
6390 id
= c_parser_peek_token (parser
)->value
;
6391 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6392 c_parser_consume_token (parser
);
6393 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6394 c_parser_consume_token (parser
);
6398 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6402 /* Parse an objc-try-catch-statement.
6404 objc-try-catch-statement:
6405 @try compound-statement objc-catch-list[opt]
6406 @try compound-statement objc-catch-list[opt] @finally compound-statement
6409 @catch ( parameter-declaration ) compound-statement
6410 objc-catch-list @catch ( parameter-declaration ) compound-statement
6414 c_parser_objc_try_catch_statement (c_parser
*parser
)
6418 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TRY
));
6419 c_parser_consume_token (parser
);
6420 loc
= c_parser_peek_token (parser
)->location
;
6421 stmt
= c_parser_compound_statement (parser
);
6422 objc_begin_try_stmt (loc
, stmt
);
6423 while (c_parser_next_token_is_keyword (parser
, RID_CATCH
))
6425 struct c_parm
*parm
;
6426 c_parser_consume_token (parser
);
6427 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6429 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6432 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6435 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6436 objc_begin_catch_clause (grokparm (parm
));
6437 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6438 c_parser_compound_statement_nostart (parser
);
6439 objc_finish_catch_clause ();
6441 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6445 c_parser_consume_token (parser
);
6446 finloc
= c_parser_peek_token (parser
)->location
;
6447 finstmt
= c_parser_compound_statement (parser
);
6448 objc_build_finally_clause (finloc
, finstmt
);
6450 objc_finish_try_stmt ();
6453 /* Parse an objc-synchronized-statement.
6455 objc-synchronized-statement:
6456 @synchronized ( expression ) compound-statement
6460 c_parser_objc_synchronized_statement (c_parser
*parser
)
6464 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6465 c_parser_consume_token (parser
);
6466 loc
= c_parser_peek_token (parser
)->location
;
6467 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6469 expr
= c_parser_expression (parser
).value
;
6470 expr
= c_fully_fold (expr
, false, NULL
);
6471 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6474 expr
= error_mark_node
;
6475 stmt
= c_parser_compound_statement (parser
);
6476 objc_build_synchronized (loc
, expr
, stmt
);
6479 /* Parse an objc-selector; return NULL_TREE without an error if the
6480 next token is not an objc-selector.
6485 enum struct union if else while do for switch case default
6486 break continue return goto asm sizeof typeof __alignof
6487 unsigned long const short volatile signed restrict _Complex
6488 in out inout bycopy byref oneway int char float double void _Bool
6490 ??? Why this selection of keywords but not, for example, storage
6491 class specifiers? */
6494 c_parser_objc_selector (c_parser
*parser
)
6496 c_token
*token
= c_parser_peek_token (parser
);
6497 tree value
= token
->value
;
6498 if (token
->type
== CPP_NAME
)
6500 c_parser_consume_token (parser
);
6503 if (token
->type
!= CPP_KEYWORD
)
6505 switch (token
->keyword
)
6546 c_parser_consume_token (parser
);
6553 /* Parse an objc-selector-arg.
6557 objc-keywordname-list
6559 objc-keywordname-list:
6561 objc-keywordname-list objc-keywordname
6569 c_parser_objc_selector_arg (c_parser
*parser
)
6571 tree sel
= c_parser_objc_selector (parser
);
6572 tree list
= NULL_TREE
;
6573 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6577 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6579 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6580 sel
= c_parser_objc_selector (parser
);
6581 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6587 /* Parse an objc-receiver.
6596 c_parser_objc_receiver (c_parser
*parser
)
6598 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6599 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6600 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6602 tree id
= c_parser_peek_token (parser
)->value
;
6603 c_parser_consume_token (parser
);
6604 return objc_get_class_reference (id
);
6606 return c_fully_fold (c_parser_expression (parser
).value
, false, NULL
);
6609 /* Parse objc-message-args.
6613 objc-keywordarg-list
6615 objc-keywordarg-list:
6617 objc-keywordarg-list objc-keywordarg
6620 objc-selector : objc-keywordexpr
6625 c_parser_objc_message_args (c_parser
*parser
)
6627 tree sel
= c_parser_objc_selector (parser
);
6628 tree list
= NULL_TREE
;
6629 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6634 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6636 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6637 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6638 sel
= c_parser_objc_selector (parser
);
6639 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6645 /* Parse an objc-keywordexpr.
6652 c_parser_objc_keywordexpr (c_parser
*parser
)
6654 tree list
= c_parser_expr_list (parser
, true, true);
6655 if (TREE_CHAIN (list
) == NULL_TREE
)
6657 /* Just return the expression, remove a level of
6659 return TREE_VALUE (list
);
6663 /* We have a comma expression, we will collapse later. */
6669 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6670 should be considered, statements. ALLOW_STMT is true if we're within
6671 the context of a function and such pragmas are to be allowed. Returns
6672 true if we actually parsed such a pragma. */
6675 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6679 id
= c_parser_peek_token (parser
)->pragma_kind
;
6680 gcc_assert (id
!= PRAGMA_NONE
);
6684 case PRAGMA_OMP_BARRIER
:
6685 if (context
!= pragma_compound
)
6687 if (context
== pragma_stmt
)
6688 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6689 "used in compound statements");
6692 c_parser_omp_barrier (parser
);
6695 case PRAGMA_OMP_FLUSH
:
6696 if (context
!= pragma_compound
)
6698 if (context
== pragma_stmt
)
6699 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6700 "used in compound statements");
6703 c_parser_omp_flush (parser
);
6706 case PRAGMA_OMP_TASKWAIT
:
6707 if (context
!= pragma_compound
)
6709 if (context
== pragma_stmt
)
6710 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
6711 "used in compound statements");
6714 c_parser_omp_taskwait (parser
);
6717 case PRAGMA_OMP_THREADPRIVATE
:
6718 c_parser_omp_threadprivate (parser
);
6721 case PRAGMA_OMP_SECTION
:
6722 error_at (c_parser_peek_token (parser
)->location
,
6723 "%<#pragma omp section%> may only be used in "
6724 "%<#pragma omp sections%> construct");
6725 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6728 case PRAGMA_GCC_PCH_PREPROCESS
:
6729 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6730 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6734 if (id
< PRAGMA_FIRST_EXTERNAL
)
6736 if (context
== pragma_external
)
6739 c_parser_error (parser
, "expected declaration specifiers");
6740 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6743 c_parser_omp_construct (parser
);
6749 c_parser_consume_pragma (parser
);
6750 c_invoke_pragma_handler (id
);
6752 /* Skip to EOL, but suppress any error message. Those will have been
6753 generated by the handler routine through calling error, as opposed
6754 to calling c_parser_error. */
6755 parser
->error
= true;
6756 c_parser_skip_to_pragma_eol (parser
);
6761 /* The interface the pragma parsers have to the lexer. */
6764 pragma_lex (tree
*value
)
6766 c_token
*tok
= c_parser_peek_token (the_parser
);
6767 enum cpp_ttype ret
= tok
->type
;
6769 *value
= tok
->value
;
6770 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6774 if (ret
== CPP_KEYWORD
)
6776 c_parser_consume_token (the_parser
);
6783 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6787 c_parser_consume_pragma (parser
);
6788 if (c_parser_next_token_is (parser
, CPP_STRING
))
6790 name
= c_parser_peek_token (parser
)->value
;
6791 c_parser_consume_token (parser
);
6794 c_parser_error (parser
, "expected string literal");
6795 c_parser_skip_to_pragma_eol (parser
);
6798 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6801 /* OpenMP 2.5 parsing routines. */
6803 /* Returns name of the next clause.
6804 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6805 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6806 returned and the token is consumed. */
6808 static pragma_omp_clause
6809 c_parser_omp_clause_name (c_parser
*parser
)
6811 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6813 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6814 result
= PRAGMA_OMP_CLAUSE_IF
;
6815 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6816 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6817 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6819 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6824 if (!strcmp ("collapse", p
))
6825 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
6826 else if (!strcmp ("copyin", p
))
6827 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6828 else if (!strcmp ("copyprivate", p
))
6829 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6832 if (!strcmp ("firstprivate", p
))
6833 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6836 if (!strcmp ("lastprivate", p
))
6837 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6840 if (!strcmp ("nowait", p
))
6841 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6842 else if (!strcmp ("num_threads", p
))
6843 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6846 if (!strcmp ("ordered", p
))
6847 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6850 if (!strcmp ("private", p
))
6851 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6854 if (!strcmp ("reduction", p
))
6855 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6858 if (!strcmp ("schedule", p
))
6859 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6860 else if (!strcmp ("shared", p
))
6861 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6864 if (!strcmp ("untied", p
))
6865 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
6870 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6871 c_parser_consume_token (parser
);
6876 /* Validate that a clause of the given type does not already exist. */
6879 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
6884 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6885 if (OMP_CLAUSE_CODE (c
) == code
)
6887 error ("too many %qs clauses", name
);
6895 variable-list , identifier
6897 If KIND is nonzero, create the appropriate node and install the decl
6898 in OMP_CLAUSE_DECL and add the node to the head of the list.
6900 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6901 return the list created. */
6904 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6907 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6908 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6909 c_parser_error (parser
, "expected identifier");
6911 while (c_parser_next_token_is (parser
, CPP_NAME
)
6912 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6914 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6917 undeclared_variable (c_parser_peek_token (parser
)->value
,
6918 c_parser_peek_token (parser
)->location
);
6919 else if (t
== error_mark_node
)
6923 tree u
= build_omp_clause (kind
);
6924 OMP_CLAUSE_DECL (u
) = t
;
6925 OMP_CLAUSE_CHAIN (u
) = list
;
6929 list
= tree_cons (t
, NULL_TREE
, list
);
6931 c_parser_consume_token (parser
);
6933 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6936 c_parser_consume_token (parser
);
6942 /* Similarly, but expect leading and trailing parenthesis. This is a very
6943 common case for omp clauses. */
6946 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
6949 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6951 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6952 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6958 collapse ( constant-expression ) */
6961 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
6963 tree c
, num
= error_mark_node
;
6967 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
6969 loc
= c_parser_peek_token (parser
)->location
;
6970 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6972 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
6973 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6975 if (num
== error_mark_node
)
6977 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
6978 || !host_integerp (num
, 0)
6979 || (n
= tree_low_cst (num
, 0)) <= 0
6983 "collapse argument needs positive constant integer expression");
6986 c
= build_omp_clause (OMP_CLAUSE_COLLAPSE
);
6987 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
6988 OMP_CLAUSE_CHAIN (c
) = list
;
6993 copyin ( variable-list ) */
6996 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6998 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
7002 copyprivate ( variable-list ) */
7005 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
7007 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
7011 default ( shared | none ) */
7014 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
7016 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
7019 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7021 if (c_parser_next_token_is (parser
, CPP_NAME
))
7023 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7028 if (strcmp ("none", p
) != 0)
7030 kind
= OMP_CLAUSE_DEFAULT_NONE
;
7034 if (strcmp ("shared", p
) != 0)
7036 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
7043 c_parser_consume_token (parser
);
7048 c_parser_error (parser
, "expected %<none%> or %<shared%>");
7050 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7052 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
7055 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
7056 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
7057 OMP_CLAUSE_CHAIN (c
) = list
;
7058 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
7064 firstprivate ( variable-list ) */
7067 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
7069 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
7073 if ( expression ) */
7076 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
7078 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7080 tree t
= c_parser_paren_condition (parser
);
7083 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
7085 c
= build_omp_clause (OMP_CLAUSE_IF
);
7086 OMP_CLAUSE_IF_EXPR (c
) = t
;
7087 OMP_CLAUSE_CHAIN (c
) = list
;
7091 c_parser_error (parser
, "expected %<(%>");
7097 lastprivate ( variable-list ) */
7100 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
7102 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
7109 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7113 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
7115 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
7116 OMP_CLAUSE_CHAIN (c
) = list
;
7121 num_threads ( expression ) */
7124 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
7126 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7128 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
7129 tree c
, t
= c_parser_expression (parser
).value
;
7130 t
= c_fully_fold (t
, false, NULL
);
7132 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7134 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
7136 c_parser_error (parser
, "expected integer expression");
7140 /* Attempt to statically determine when the number isn't positive. */
7141 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
7142 build_int_cst (TREE_TYPE (t
), 0));
7143 if (c
== boolean_true_node
)
7145 warning_at (expr_loc
, 0,
7146 "%<num_threads%> value must be positive");
7147 t
= integer_one_node
;
7150 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
7152 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
7153 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
7154 OMP_CLAUSE_CHAIN (c
) = list
;
7165 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7169 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
7171 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
7172 OMP_CLAUSE_CHAIN (c
) = list
;
7177 private ( variable-list ) */
7180 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
7182 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
7186 reduction ( reduction-operator : variable-list )
7189 One of: + * - & ^ | && || */
7192 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
7194 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7196 enum tree_code code
;
7198 switch (c_parser_peek_token (parser
)->type
)
7210 code
= BIT_AND_EXPR
;
7213 code
= BIT_XOR_EXPR
;
7216 code
= BIT_IOR_EXPR
;
7219 code
= TRUTH_ANDIF_EXPR
;
7222 code
= TRUTH_ORIF_EXPR
;
7225 c_parser_error (parser
,
7226 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7227 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7228 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7231 c_parser_consume_token (parser
);
7232 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7236 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7237 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7238 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7242 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7248 schedule ( schedule-kind )
7249 schedule ( schedule-kind , expression )
7252 static | dynamic | guided | runtime | auto
7256 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7260 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7263 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7265 if (c_parser_next_token_is (parser
, CPP_NAME
))
7267 tree kind
= c_parser_peek_token (parser
)->value
;
7268 const char *p
= IDENTIFIER_POINTER (kind
);
7273 if (strcmp ("dynamic", p
) != 0)
7275 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7279 if (strcmp ("guided", p
) != 0)
7281 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7285 if (strcmp ("runtime", p
) != 0)
7287 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7294 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7295 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7296 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
7297 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
7301 c_parser_consume_token (parser
);
7302 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7305 c_parser_consume_token (parser
);
7307 here
= c_parser_peek_token (parser
)->location
;
7308 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7309 t
= c_fully_fold (t
, false, NULL
);
7311 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7312 error_at (here
, "schedule %<runtime%> does not take "
7313 "a %<chunk_size%> parameter");
7314 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
7316 "schedule %<auto%> does not take "
7317 "a %<chunk_size%> parameter");
7318 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7319 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7321 c_parser_error (parser
, "expected integer expression");
7323 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7326 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7327 "expected %<,%> or %<)%>");
7329 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7330 OMP_CLAUSE_CHAIN (c
) = list
;
7334 c_parser_error (parser
, "invalid schedule kind");
7335 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7340 shared ( variable-list ) */
7343 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7345 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7352 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7356 /* FIXME: Should we allow duplicates? */
7357 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
7359 c
= build_omp_clause (OMP_CLAUSE_UNTIED
);
7360 OMP_CLAUSE_CHAIN (c
) = list
;
7364 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7365 is a bitmask in MASK. Return the list of clauses found; the result
7366 of clause default goes in *pdefault. */
7369 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7372 tree clauses
= NULL
;
7375 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7378 pragma_omp_clause c_kind
;
7380 tree prev
= clauses
;
7382 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
7383 c_parser_consume_token (parser
);
7386 here
= c_parser_peek_token (parser
)->location
;
7387 c_kind
= c_parser_omp_clause_name (parser
);
7391 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
7392 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
7393 c_name
= "collapse";
7395 case PRAGMA_OMP_CLAUSE_COPYIN
:
7396 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7399 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7400 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7401 c_name
= "copyprivate";
7403 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7404 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7407 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7408 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7409 c_name
= "firstprivate";
7411 case PRAGMA_OMP_CLAUSE_IF
:
7412 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7415 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7416 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7417 c_name
= "lastprivate";
7419 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7420 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7423 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7424 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7425 c_name
= "num_threads";
7427 case PRAGMA_OMP_CLAUSE_ORDERED
:
7428 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7431 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7432 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7435 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7436 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7437 c_name
= "reduction";
7439 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7440 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7441 c_name
= "schedule";
7443 case PRAGMA_OMP_CLAUSE_SHARED
:
7444 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7447 case PRAGMA_OMP_CLAUSE_UNTIED
:
7448 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
7452 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7456 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7458 /* Remove the invalid clause(s) from the list to avoid
7459 confusing the rest of the compiler. */
7461 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
7466 c_parser_skip_to_pragma_eol (parser
);
7468 return c_finish_omp_clauses (clauses
);
7475 In practice, we're also interested in adding the statement to an
7476 outer node. So it is convenient if we work around the fact that
7477 c_parser_statement calls add_stmt. */
7480 c_parser_omp_structured_block (c_parser
*parser
)
7482 tree stmt
= push_stmt_list ();
7483 c_parser_statement (parser
);
7484 return pop_stmt_list (stmt
);
7488 # pragma omp atomic new-line
7492 x binop= expr | x++ | ++x | x-- | --x
7494 +, *, -, /, &, ^, |, <<, >>
7496 where x is an lvalue expression with scalar type. */
7499 c_parser_omp_atomic (c_parser
*parser
)
7503 enum tree_code code
;
7504 struct c_expr rhs_expr
;
7506 c_parser_skip_to_pragma_eol (parser
);
7508 lhs
= c_parser_unary_expression (parser
).value
;
7509 lhs
= c_fully_fold (lhs
, false, NULL
);
7510 switch (TREE_CODE (lhs
))
7514 c_parser_skip_to_end_of_block_or_statement (parser
);
7517 case PREINCREMENT_EXPR
:
7518 case POSTINCREMENT_EXPR
:
7519 lhs
= TREE_OPERAND (lhs
, 0);
7521 rhs
= integer_one_node
;
7524 case PREDECREMENT_EXPR
:
7525 case POSTDECREMENT_EXPR
:
7526 lhs
= TREE_OPERAND (lhs
, 0);
7528 rhs
= integer_one_node
;
7532 switch (c_parser_peek_token (parser
)->type
)
7538 code
= TRUNC_DIV_EXPR
;
7553 code
= BIT_AND_EXPR
;
7556 code
= BIT_IOR_EXPR
;
7559 code
= BIT_XOR_EXPR
;
7562 c_parser_error (parser
,
7563 "invalid operator for %<#pragma omp atomic%>");
7567 c_parser_consume_token (parser
);
7568 rhs_expr
= c_parser_expression (parser
);
7569 rhs_expr
= default_function_array_conversion (rhs_expr
);
7570 rhs
= rhs_expr
.value
;
7571 rhs
= c_fully_fold (rhs
, false, NULL
);
7574 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7575 if (stmt
!= error_mark_node
)
7577 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7582 # pragma omp barrier new-line
7586 c_parser_omp_barrier (c_parser
*parser
)
7588 c_parser_consume_pragma (parser
);
7589 c_parser_skip_to_pragma_eol (parser
);
7591 c_finish_omp_barrier ();
7595 # pragma omp critical [(name)] new-line
7600 c_parser_omp_critical (c_parser
*parser
)
7602 tree stmt
, name
= NULL
;
7604 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7606 c_parser_consume_token (parser
);
7607 if (c_parser_next_token_is (parser
, CPP_NAME
))
7609 name
= c_parser_peek_token (parser
)->value
;
7610 c_parser_consume_token (parser
);
7611 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7614 c_parser_error (parser
, "expected identifier");
7616 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7617 c_parser_error (parser
, "expected %<(%> or end of line");
7618 c_parser_skip_to_pragma_eol (parser
);
7620 stmt
= c_parser_omp_structured_block (parser
);
7621 return c_finish_omp_critical (stmt
, name
);
7625 # pragma omp flush flush-vars[opt] new-line
7628 ( variable-list ) */
7631 c_parser_omp_flush (c_parser
*parser
)
7633 c_parser_consume_pragma (parser
);
7634 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7635 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
7636 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7637 c_parser_error (parser
, "expected %<(%> or end of line");
7638 c_parser_skip_to_pragma_eol (parser
);
7640 c_finish_omp_flush ();
7643 /* Parse the restricted form of the for statement allowed by OpenMP.
7644 The real trick here is to determine the loop control variable early
7645 so that we can push a new decl if necessary to make it private. */
7648 c_parser_omp_for_loop (c_parser
*parser
, tree clauses
, tree
*par_clauses
)
7650 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
7651 tree declv
, condv
, incrv
, initv
, for_block
= NULL
, ret
= NULL
;
7653 bool fail
= false, open_brace_parsed
= false;
7654 int i
, collapse
= 1, nbraces
= 0;
7656 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
7657 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
7658 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
7660 gcc_assert (collapse
>= 1);
7662 declv
= make_tree_vec (collapse
);
7663 initv
= make_tree_vec (collapse
);
7664 condv
= make_tree_vec (collapse
);
7665 incrv
= make_tree_vec (collapse
);
7667 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7669 c_parser_error (parser
, "for statement expected");
7672 loc
= c_parser_peek_token (parser
)->location
;
7673 c_parser_consume_token (parser
);
7675 for (i
= 0; i
< collapse
; i
++)
7679 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7682 /* Parse the initialization declaration or expression. */
7683 if (c_parser_next_token_starts_declspecs (parser
))
7687 = tree_cons (NULL
, c_begin_compound_stmt (true), for_block
);
7688 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7689 decl
= check_for_loop_decls ();
7692 if (DECL_INITIAL (decl
) == error_mark_node
)
7693 decl
= error_mark_node
;
7696 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7697 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7699 struct c_expr init_exp
;
7700 location_t init_loc
;
7702 decl
= c_parser_postfix_expression (parser
).value
;
7704 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7705 init_loc
= c_parser_peek_token (parser
)->location
;
7707 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
7708 init_exp
= default_function_array_conversion (init_exp
);
7709 init
= build_modify_expr (init_loc
,
7710 decl
, NOP_EXPR
, init_exp
.value
);
7711 init
= c_process_expr_stmt (init
);
7713 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7718 c_parser_error (parser
,
7719 "expected iteration declaration or initialization");
7720 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7726 /* Parse the loop condition. */
7728 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7730 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
7731 struct c_expr cond_expr
= c_parser_binary_expression (parser
, NULL
);
7733 cond
= cond_expr
.value
;
7734 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
7735 cond
= c_fully_fold (cond
, false, NULL
);
7736 switch (cond_expr
.original_code
)
7744 /* Can't be cond = error_mark_node, because we want to preserve
7745 the location until c_finish_omp_for. */
7746 cond
= build1 (NOP_EXPR
, boolean_type_node
, error_mark_node
);
7749 protected_set_expr_location (cond
, cond_loc
);
7751 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7753 /* Parse the increment expression. */
7755 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7757 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
7759 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7760 protected_set_expr_location (incr
, incr_loc
);
7762 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7764 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
7768 TREE_VEC_ELT (declv
, i
) = decl
;
7769 TREE_VEC_ELT (initv
, i
) = init
;
7770 TREE_VEC_ELT (condv
, i
) = cond
;
7771 TREE_VEC_ELT (incrv
, i
) = incr
;
7775 if (i
== collapse
- 1)
7778 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7779 in between the collapsed for loops to be still considered perfectly
7780 nested. Hopefully the final version clarifies this.
7781 For now handle (multiple) {'s and empty statements. */
7784 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7786 c_parser_consume_token (parser
);
7789 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7791 c_parser_consume_token (parser
);
7795 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7796 c_parser_consume_token (parser
);
7799 c_parser_error (parser
, "not enough perfectly nested loops");
7802 open_brace_parsed
= true;
7812 nbraces
+= bracecount
;
7815 save_break
= c_break_label
;
7816 c_break_label
= size_one_node
;
7817 save_cont
= c_cont_label
;
7818 c_cont_label
= NULL_TREE
;
7819 body
= push_stmt_list ();
7821 if (open_brace_parsed
)
7823 stmt
= c_begin_compound_stmt (true);
7824 c_parser_compound_statement_nostart (parser
);
7825 add_stmt (c_end_compound_stmt (stmt
, true));
7828 add_stmt (c_parser_c99_block_statement (parser
));
7830 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7832 body
= pop_stmt_list (body
);
7833 c_break_label
= save_break
;
7834 c_cont_label
= save_cont
;
7838 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7840 c_parser_consume_token (parser
);
7843 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7844 c_parser_consume_token (parser
);
7847 c_parser_error (parser
, "collapsed loops not perfectly nested");
7850 stmt
= c_begin_compound_stmt (true);
7852 c_parser_compound_statement_nostart (parser
);
7853 body
= c_end_compound_stmt (stmt
, true);
7860 /* Only bother calling c_finish_omp_for if we haven't already generated
7861 an error from the initialization parsing. */
7864 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
7867 if (par_clauses
!= NULL
)
7870 for (c
= par_clauses
; *c
; )
7871 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
7872 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
7873 c
= &OMP_CLAUSE_CHAIN (*c
);
7876 for (i
= 0; i
< collapse
; i
++)
7877 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
7880 c
= &OMP_CLAUSE_CHAIN (*c
);
7881 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
7884 "iteration variable %qD should not be firstprivate",
7885 OMP_CLAUSE_DECL (*c
));
7886 *c
= OMP_CLAUSE_CHAIN (*c
);
7890 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7891 change it to shared (decl) in
7892 OMP_PARALLEL_CLAUSES. */
7893 tree l
= build_omp_clause (OMP_CLAUSE_LASTPRIVATE
);
7894 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
7895 OMP_CLAUSE_CHAIN (l
) = clauses
;
7897 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
7901 OMP_FOR_CLAUSES (stmt
) = clauses
;
7908 stmt
= c_end_compound_stmt (TREE_VALUE (for_block
), true);
7910 for_block
= TREE_CHAIN (for_block
);
7916 #pragma omp for for-clause[optseq] new-line
7920 #define OMP_FOR_CLAUSE_MASK \
7921 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7922 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7923 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7924 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7925 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7926 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7927 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7928 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7931 c_parser_omp_for (c_parser
*parser
)
7933 tree block
, clauses
, ret
;
7935 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7938 block
= c_begin_compound_stmt (true);
7939 ret
= c_parser_omp_for_loop (parser
, clauses
, NULL
);
7940 block
= c_end_compound_stmt (block
, true);
7947 # pragma omp master new-line
7952 c_parser_omp_master (c_parser
*parser
)
7954 c_parser_skip_to_pragma_eol (parser
);
7955 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7959 # pragma omp ordered new-line
7964 c_parser_omp_ordered (c_parser
*parser
)
7966 c_parser_skip_to_pragma_eol (parser
);
7967 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7973 { section-sequence }
7976 section-directive[opt] structured-block
7977 section-sequence section-directive structured-block */
7980 c_parser_omp_sections_scope (c_parser
*parser
)
7983 bool error_suppress
= false;
7986 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7988 /* Avoid skipping until the end of the block. */
7989 parser
->error
= false;
7993 stmt
= push_stmt_list ();
7995 loc
= c_parser_peek_token (parser
)->location
;
7996 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7998 substmt
= push_stmt_list ();
8002 c_parser_statement (parser
);
8004 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
8006 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
8008 if (c_parser_next_token_is (parser
, CPP_EOF
))
8012 substmt
= pop_stmt_list (substmt
);
8013 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
8014 SET_EXPR_LOCATION (substmt
, loc
);
8020 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
8022 if (c_parser_next_token_is (parser
, CPP_EOF
))
8025 loc
= c_parser_peek_token (parser
)->location
;
8026 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
8028 c_parser_consume_pragma (parser
);
8029 c_parser_skip_to_pragma_eol (parser
);
8030 error_suppress
= false;
8032 else if (!error_suppress
)
8034 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
8035 error_suppress
= true;
8038 substmt
= c_parser_omp_structured_block (parser
);
8039 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
8040 SET_EXPR_LOCATION (substmt
, loc
);
8043 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
8044 "expected %<#pragma omp section%> or %<}%>");
8046 substmt
= pop_stmt_list (stmt
);
8048 stmt
= make_node (OMP_SECTIONS
);
8049 TREE_TYPE (stmt
) = void_type_node
;
8050 OMP_SECTIONS_BODY (stmt
) = substmt
;
8052 return add_stmt (stmt
);
8056 # pragma omp sections sections-clause[optseq] newline
8060 #define OMP_SECTIONS_CLAUSE_MASK \
8061 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8062 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8063 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
8064 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8065 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8068 c_parser_omp_sections (c_parser
*parser
)
8070 tree block
, clauses
, ret
;
8072 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
8073 "#pragma omp sections");
8075 block
= c_begin_compound_stmt (true);
8076 ret
= c_parser_omp_sections_scope (parser
);
8078 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
8079 block
= c_end_compound_stmt (block
, true);
8086 # pragma parallel parallel-clause new-line
8087 # pragma parallel for parallel-for-clause new-line
8088 # pragma parallel sections parallel-sections-clause new-line
8091 #define OMP_PARALLEL_CLAUSE_MASK \
8092 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8093 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8094 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8095 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8096 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8097 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8098 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8099 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8102 c_parser_omp_parallel (c_parser
*parser
)
8104 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
8105 const char *p_name
= "#pragma omp parallel";
8106 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
8107 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
8109 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
8111 c_parser_consume_token (parser
);
8112 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
8113 p_name
= "#pragma omp parallel for";
8114 mask
|= OMP_FOR_CLAUSE_MASK
;
8115 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8117 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8119 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8120 if (strcmp (p
, "sections") == 0)
8122 c_parser_consume_token (parser
);
8123 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
8124 p_name
= "#pragma omp parallel sections";
8125 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
8126 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8130 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
8134 case PRAGMA_OMP_PARALLEL
:
8135 block
= c_begin_omp_parallel ();
8136 c_parser_statement (parser
);
8137 stmt
= c_finish_omp_parallel (clauses
, block
);
8140 case PRAGMA_OMP_PARALLEL_FOR
:
8141 block
= c_begin_omp_parallel ();
8142 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8143 c_parser_omp_for_loop (parser
, ws_clause
, &par_clause
);
8144 stmt
= c_finish_omp_parallel (par_clause
, block
);
8145 OMP_PARALLEL_COMBINED (stmt
) = 1;
8148 case PRAGMA_OMP_PARALLEL_SECTIONS
:
8149 block
= c_begin_omp_parallel ();
8150 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8151 stmt
= c_parser_omp_sections_scope (parser
);
8153 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
8154 stmt
= c_finish_omp_parallel (par_clause
, block
);
8155 OMP_PARALLEL_COMBINED (stmt
) = 1;
8166 # pragma omp single single-clause[optseq] new-line
8170 #define OMP_SINGLE_CLAUSE_MASK \
8171 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8172 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8173 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8174 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8177 c_parser_omp_single (c_parser
*parser
)
8179 tree stmt
= make_node (OMP_SINGLE
);
8180 TREE_TYPE (stmt
) = void_type_node
;
8182 OMP_SINGLE_CLAUSES (stmt
)
8183 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
8184 "#pragma omp single");
8185 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
8187 return add_stmt (stmt
);
8191 # pragma omp task task-clause[optseq] new-line
8194 #define OMP_TASK_CLAUSE_MASK \
8195 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8196 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8197 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8198 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8199 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8200 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8203 c_parser_omp_task (c_parser
*parser
)
8205 tree clauses
, block
;
8207 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
8208 "#pragma omp task");
8210 block
= c_begin_omp_task ();
8211 c_parser_statement (parser
);
8212 return c_finish_omp_task (clauses
, block
);
8216 # pragma omp taskwait new-line
8220 c_parser_omp_taskwait (c_parser
*parser
)
8222 c_parser_consume_pragma (parser
);
8223 c_parser_skip_to_pragma_eol (parser
);
8225 c_finish_omp_taskwait ();
8228 /* Main entry point to parsing most OpenMP pragmas. */
8231 c_parser_omp_construct (c_parser
*parser
)
8233 enum pragma_kind p_kind
;
8237 loc
= c_parser_peek_token (parser
)->location
;
8238 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
8239 c_parser_consume_pragma (parser
);
8241 /* For all constructs below except #pragma omp atomic
8242 MUST_NOT_THROW catch handlers are needed when exceptions
8244 if (p_kind
!= PRAGMA_OMP_ATOMIC
)
8245 c_maybe_initialize_eh ();
8249 case PRAGMA_OMP_ATOMIC
:
8250 c_parser_omp_atomic (parser
);
8252 case PRAGMA_OMP_CRITICAL
:
8253 stmt
= c_parser_omp_critical (parser
);
8255 case PRAGMA_OMP_FOR
:
8256 stmt
= c_parser_omp_for (parser
);
8258 case PRAGMA_OMP_MASTER
:
8259 stmt
= c_parser_omp_master (parser
);
8261 case PRAGMA_OMP_ORDERED
:
8262 stmt
= c_parser_omp_ordered (parser
);
8264 case PRAGMA_OMP_PARALLEL
:
8265 stmt
= c_parser_omp_parallel (parser
);
8267 case PRAGMA_OMP_SECTIONS
:
8268 stmt
= c_parser_omp_sections (parser
);
8270 case PRAGMA_OMP_SINGLE
:
8271 stmt
= c_parser_omp_single (parser
);
8273 case PRAGMA_OMP_TASK
:
8274 stmt
= c_parser_omp_task (parser
);
8281 SET_EXPR_LOCATION (stmt
, loc
);
8286 # pragma omp threadprivate (variable-list) */
8289 c_parser_omp_threadprivate (c_parser
*parser
)
8293 c_parser_consume_pragma (parser
);
8294 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
8296 /* Mark every variable in VARS to be assigned thread local storage. */
8297 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
8299 tree v
= TREE_PURPOSE (t
);
8301 /* If V had already been marked threadprivate, it doesn't matter
8302 whether it had been used prior to this point. */
8303 if (TREE_CODE (v
) != VAR_DECL
)
8304 error ("%qD is not a variable", v
);
8305 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
8306 error ("%qE declared %<threadprivate%> after first use", v
);
8307 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
8308 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
8309 else if (TREE_TYPE (v
) == error_mark_node
)
8311 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
8312 error ("%<threadprivate%> %qE has incomplete type", v
);
8315 if (! DECL_THREAD_LOCAL_P (v
))
8317 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
8318 /* If rtl has been already set for this var, call
8319 make_decl_rtl once again, so that encode_section_info
8320 has a chance to look at the new decl flags. */
8321 if (DECL_RTL_SET_P (v
))
8324 C_DECL_THREADPRIVATE_P (v
) = 1;
8328 c_parser_skip_to_pragma_eol (parser
);
8332 /* Parse a single source file. */
8337 /* Use local storage to begin. If the first token is a pragma, parse it.
8338 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8339 which will cause garbage collection. */
8342 memset (&tparser
, 0, sizeof tparser
);
8343 the_parser
= &tparser
;
8345 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
8346 c_parser_pragma_pch_preprocess (&tparser
);
8348 the_parser
= GGC_NEW (c_parser
);
8349 *the_parser
= tparser
;
8351 c_parser_translation_unit (the_parser
);
8355 #include "gt-c-parser.h"