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);
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
);
1461 tree proto
= NULL_TREE
;
1462 gcc_assert (c_dialect_objc ());
1464 if (c_parser_next_token_is (parser
, CPP_LESS
))
1465 proto
= c_parser_objc_protocol_refs (parser
);
1466 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1468 declspecs_add_type (specs
, t
);
1471 if (c_parser_next_token_is (parser
, CPP_LESS
))
1473 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1474 nisse@lysator.liu.se. */
1476 gcc_assert (c_dialect_objc ());
1477 if (!typespec_ok
|| seen_type
)
1479 proto
= c_parser_objc_protocol_refs (parser
);
1481 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1482 declspecs_add_type (specs
, t
);
1485 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1486 switch (c_parser_peek_token (parser
)->keyword
)
1498 /* TODO: Distinguish between function specifiers (inline)
1499 and storage class specifiers, either here or in
1500 declspecs_add_scspec. */
1501 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1502 c_parser_consume_token (parser
);
1525 if (c_dialect_objc ())
1526 parser
->objc_need_raw_identifier
= true;
1527 t
.kind
= ctsk_resword
;
1528 t
.spec
= c_parser_peek_token (parser
)->value
;
1529 declspecs_add_type (specs
, t
);
1530 c_parser_consume_token (parser
);
1537 t
= c_parser_enum_specifier (parser
);
1538 declspecs_add_type (specs
, t
);
1546 t
= c_parser_struct_or_union_specifier (parser
);
1547 declspecs_add_type (specs
, t
);
1550 /* ??? The old parser rejected typeof after other type
1551 specifiers, but is a syntax error the best way of
1553 if (!typespec_ok
|| seen_type
)
1557 t
= c_parser_typeof_specifier (parser
);
1558 declspecs_add_type (specs
, t
);
1564 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1565 c_parser_consume_token (parser
);
1570 attrs
= c_parser_attributes (parser
);
1571 declspecs_add_attrs (specs
, attrs
);
1580 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1583 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1584 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1585 enum attributes[opt] identifier
1587 The form with trailing comma is new in C99. The forms with
1588 attributes are GNU extensions. In GNU C, we accept any expression
1589 without commas in the syntax (assignment expressions, not just
1590 conditional expressions); assignment expressions will be diagnosed
1595 enumerator-list , enumerator
1598 enumeration-constant
1599 enumeration-constant = constant-expression
1602 static struct c_typespec
1603 c_parser_enum_specifier (c_parser
*parser
)
1605 struct c_typespec ret
;
1607 tree ident
= NULL_TREE
;
1608 location_t ident_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1609 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1610 c_parser_consume_token (parser
);
1611 attrs
= c_parser_attributes (parser
);
1612 /* Set the location in case we create a decl now. */
1613 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1614 if (c_parser_next_token_is (parser
, CPP_NAME
))
1616 ident
= c_parser_peek_token (parser
)->value
;
1617 ident_loc
= c_parser_peek_token (parser
)->location
;
1618 c_parser_consume_token (parser
);
1620 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1622 /* Parse an enum definition. */
1623 struct c_enum_contents the_enum
;
1624 tree type
= start_enum (&the_enum
, ident
);
1626 /* We chain the enumerators in reverse order, then put them in
1627 forward order at the end. */
1628 tree values
= NULL_TREE
;
1629 c_parser_consume_token (parser
);
1637 location_t comma_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
1638 location_t value_loc
;
1639 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1641 c_parser_error (parser
, "expected identifier");
1642 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1643 values
= error_mark_node
;
1646 token
= c_parser_peek_token (parser
);
1647 enum_id
= token
->value
;
1648 /* Set the location in case we create a decl now. */
1649 c_parser_set_source_position_from_token (token
);
1650 value_loc
= token
->location
;
1651 c_parser_consume_token (parser
);
1652 if (c_parser_next_token_is (parser
, CPP_EQ
))
1654 c_parser_consume_token (parser
);
1655 value_loc
= c_parser_peek_token (parser
)->location
;
1656 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1659 enum_value
= NULL_TREE
;
1660 enum_decl
= build_enumerator (&the_enum
, enum_id
, enum_value
,
1662 TREE_CHAIN (enum_decl
) = values
;
1665 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1667 comma_loc
= c_parser_peek_token (parser
)->location
;
1669 c_parser_consume_token (parser
);
1671 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1673 if (seen_comma
&& !flag_isoc99
)
1674 pedwarn (comma_loc
, OPT_pedantic
, "comma at end of enumerator list");
1675 c_parser_consume_token (parser
);
1680 c_parser_error (parser
, "expected %<,%> or %<}%>");
1681 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1682 values
= error_mark_node
;
1686 postfix_attrs
= c_parser_attributes (parser
);
1687 ret
.spec
= finish_enum (type
, nreverse (values
),
1688 chainon (attrs
, postfix_attrs
));
1689 ret
.kind
= ctsk_tagdef
;
1694 c_parser_error (parser
, "expected %<{%>");
1695 ret
.spec
= error_mark_node
;
1696 ret
.kind
= ctsk_tagref
;
1699 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1700 /* In ISO C, enumerated types can be referred to only if already
1702 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1705 pedwarn (ident_loc
, OPT_pedantic
,
1706 "ISO C forbids forward references to %<enum%> types");
1711 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1713 struct-or-union-specifier:
1714 struct-or-union attributes[opt] identifier[opt]
1715 { struct-contents } attributes[opt]
1716 struct-or-union attributes[opt] identifier
1719 struct-declaration-list
1721 struct-declaration-list:
1722 struct-declaration ;
1723 struct-declaration-list struct-declaration ;
1730 struct-declaration-list struct-declaration
1732 struct-declaration-list:
1733 struct-declaration-list ;
1736 (Note that in the syntax here, unlike that in ISO C, the semicolons
1737 are included here rather than in struct-declaration, in order to
1738 describe the syntax with extra semicolons and missing semicolon at
1743 struct-declaration-list:
1744 @defs ( class-name )
1746 (Note this does not include a trailing semicolon, but can be
1747 followed by further declarations, and gets a pedwarn-if-pedantic
1748 when followed by a semicolon.) */
1750 static struct c_typespec
1751 c_parser_struct_or_union_specifier (c_parser
*parser
)
1753 struct c_typespec ret
;
1755 tree ident
= NULL_TREE
;
1756 enum tree_code code
;
1757 switch (c_parser_peek_token (parser
)->keyword
)
1768 c_parser_consume_token (parser
);
1769 attrs
= c_parser_attributes (parser
);
1770 /* Set the location in case we create a decl now. */
1771 c_parser_set_source_position_from_token (c_parser_peek_token (parser
));
1772 if (c_parser_next_token_is (parser
, CPP_NAME
))
1774 ident
= c_parser_peek_token (parser
)->value
;
1775 c_parser_consume_token (parser
);
1777 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1779 /* Parse a struct or union definition. Start the scope of the
1780 tag before parsing components. */
1781 tree type
= start_struct (code
, ident
);
1783 /* We chain the components in reverse order, then put them in
1784 forward order at the end. Each struct-declaration may
1785 declare multiple components (comma-separated), so we must use
1786 chainon to join them, although when parsing each
1787 struct-declaration we can use TREE_CHAIN directly.
1789 The theory behind all this is that there will be more
1790 semicolon separated fields than comma separated fields, and
1791 so we'll be minimizing the number of node traversals required
1793 tree contents
= NULL_TREE
;
1794 c_parser_consume_token (parser
);
1795 /* Handle the Objective-C @defs construct,
1796 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1797 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1800 gcc_assert (c_dialect_objc ());
1801 c_parser_consume_token (parser
);
1802 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1804 if (c_parser_next_token_is (parser
, CPP_NAME
)
1805 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1807 name
= c_parser_peek_token (parser
)->value
;
1808 c_parser_consume_token (parser
);
1812 c_parser_error (parser
, "expected class name");
1813 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1816 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1818 contents
= nreverse (objc_get_class_ivars (name
));
1821 /* Parse the struct-declarations and semicolons. Problems with
1822 semicolons are diagnosed here; empty structures are diagnosed
1827 /* Parse any stray semicolon. */
1828 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1830 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
1831 "extra semicolon in struct or union specified");
1832 c_parser_consume_token (parser
);
1835 /* Stop if at the end of the struct or union contents. */
1836 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1838 c_parser_consume_token (parser
);
1841 /* Accept #pragmas at struct scope. */
1842 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1844 c_parser_pragma (parser
, pragma_external
);
1847 /* Parse some comma-separated declarations, but not the
1848 trailing semicolon if any. */
1849 decls
= c_parser_struct_declaration (parser
);
1850 contents
= chainon (decls
, contents
);
1851 /* If no semicolon follows, either we have a parse error or
1852 are at the end of the struct or union and should
1854 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1855 c_parser_consume_token (parser
);
1858 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1859 pedwarn (c_parser_peek_token (parser
)->location
, 0,
1860 "no semicolon at end of struct or union");
1863 c_parser_error (parser
, "expected %<;%>");
1864 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1869 postfix_attrs
= c_parser_attributes (parser
);
1870 ret
.spec
= finish_struct (type
, nreverse (contents
),
1871 chainon (attrs
, postfix_attrs
));
1872 ret
.kind
= ctsk_tagdef
;
1877 c_parser_error (parser
, "expected %<{%>");
1878 ret
.spec
= error_mark_node
;
1879 ret
.kind
= ctsk_tagref
;
1882 ret
= parser_xref_tag (code
, ident
);
1886 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1887 the trailing semicolon.
1890 specifier-qualifier-list struct-declarator-list
1892 specifier-qualifier-list:
1893 type-specifier specifier-qualifier-list[opt]
1894 type-qualifier specifier-qualifier-list[opt]
1895 attributes specifier-qualifier-list[opt]
1897 struct-declarator-list:
1899 struct-declarator-list , attributes[opt] struct-declarator
1902 declarator attributes[opt]
1903 declarator[opt] : constant-expression attributes[opt]
1908 __extension__ struct-declaration
1909 specifier-qualifier-list
1911 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1912 of attributes where shown is a GNU extension. In GNU C, we accept
1913 any expression without commas in the syntax (assignment
1914 expressions, not just conditional expressions); assignment
1915 expressions will be diagnosed as non-constant. */
1918 c_parser_struct_declaration (c_parser
*parser
)
1920 struct c_declspecs
*specs
;
1922 tree all_prefix_attrs
;
1924 location_t decl_loc
;
1925 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
1929 ext
= disable_extension_diagnostics ();
1930 c_parser_consume_token (parser
);
1931 decl
= c_parser_struct_declaration (parser
);
1932 restore_extension_diagnostics (ext
);
1935 specs
= build_null_declspecs ();
1936 decl_loc
= c_parser_peek_token (parser
)->location
;
1937 c_parser_declspecs (parser
, specs
, false, true, true);
1940 if (!specs
->declspecs_seen_p
)
1942 c_parser_error (parser
, "expected specifier-qualifier-list");
1945 finish_declspecs (specs
);
1946 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1949 if (!specs
->type_seen_p
)
1951 pedwarn (decl_loc
, OPT_pedantic
,
1952 "ISO C forbids member declarations with no members");
1953 shadow_tag_warned (specs
, pedantic
);
1958 /* Support for unnamed structs or unions as members of
1959 structs or unions (which is [a] useful and [b] supports
1963 ret
= grokfield (c_parser_peek_token (parser
)->location
,
1964 build_id_declarator (NULL_TREE
), specs
,
1967 decl_attributes (&ret
, attrs
, 0);
1971 pending_xref_error ();
1972 prefix_attrs
= specs
->attrs
;
1973 all_prefix_attrs
= prefix_attrs
;
1974 specs
->attrs
= NULL_TREE
;
1978 /* Declaring one or more declarators or un-named bit-fields. */
1979 struct c_declarator
*declarator
;
1981 if (c_parser_next_token_is (parser
, CPP_COLON
))
1982 declarator
= build_id_declarator (NULL_TREE
);
1984 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1985 C_DTR_NORMAL
, &dummy
);
1986 if (declarator
== NULL
)
1988 c_parser_skip_to_end_of_block_or_statement (parser
);
1991 if (c_parser_next_token_is (parser
, CPP_COLON
)
1992 || c_parser_next_token_is (parser
, CPP_COMMA
)
1993 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1994 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
1995 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1997 tree postfix_attrs
= NULL_TREE
;
1998 tree width
= NULL_TREE
;
2000 if (c_parser_next_token_is (parser
, CPP_COLON
))
2002 c_parser_consume_token (parser
);
2003 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2005 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2006 postfix_attrs
= c_parser_attributes (parser
);
2007 d
= grokfield (c_parser_peek_token (parser
)->location
,
2008 declarator
, specs
, width
, &all_prefix_attrs
);
2009 decl_attributes (&d
, chainon (postfix_attrs
,
2010 all_prefix_attrs
), 0);
2011 TREE_CHAIN (d
) = decls
;
2013 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2014 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2017 all_prefix_attrs
= prefix_attrs
;
2018 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2019 c_parser_consume_token (parser
);
2020 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2021 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2023 /* Semicolon consumed in caller. */
2028 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2034 c_parser_error (parser
,
2035 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2036 "%<__attribute__%>");
2043 /* Parse a typeof specifier (a GNU extension).
2046 typeof ( expression )
2047 typeof ( type-name )
2050 static struct c_typespec
2051 c_parser_typeof_specifier (c_parser
*parser
)
2053 struct c_typespec ret
;
2054 ret
.kind
= ctsk_typeof
;
2055 ret
.spec
= error_mark_node
;
2056 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2057 c_parser_consume_token (parser
);
2060 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2066 if (c_parser_next_token_starts_typename (parser
))
2068 struct c_type_name
*type
= c_parser_type_name (parser
);
2073 ret
.spec
= groktypename (type
);
2074 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2080 location_t here
= c_parser_peek_token (parser
)->location
;
2081 struct c_expr expr
= c_parser_expression (parser
);
2084 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2085 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2086 error_at (here
, "%<typeof%> applied to a bit-field");
2087 ret
.spec
= TREE_TYPE (expr
.value
);
2088 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2089 /* This should be returned with the type so that when the type
2090 is evaluated, this can be evaluated. For now, we avoid
2091 evaluation when the context might. */
2092 if (!skip_evaluation
&& was_vm
)
2094 tree e
= expr
.value
;
2096 /* If the expression is not of a type to which we cannot assign a line
2097 number, wrap the thing in a no-op NOP_EXPR. */
2098 if (DECL_P (e
) || CONSTANT_CLASS_P (e
))
2099 e
= build1 (NOP_EXPR
, void_type_node
, e
);
2101 protected_set_expr_location (e
, here
);
2105 pop_maybe_used (was_vm
);
2107 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2111 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2112 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2113 be redeclared; otherwise it may not. KIND indicates which kind of
2114 declarator is wanted. Returns a valid declarator except in the
2115 case of a syntax error in which case NULL is returned. *SEEN_ID is
2116 set to true if an identifier being declared is seen; this is used
2117 to diagnose bad forms of abstract array declarators and to
2118 determine whether an identifier list is syntactically permitted.
2121 pointer[opt] direct-declarator
2125 ( attributes[opt] declarator )
2126 direct-declarator array-declarator
2127 direct-declarator ( parameter-type-list )
2128 direct-declarator ( identifier-list[opt] )
2131 * type-qualifier-list[opt]
2132 * type-qualifier-list[opt] pointer
2134 type-qualifier-list:
2137 type-qualifier-list type-qualifier
2138 type-qualifier-list attributes
2140 parameter-type-list:
2142 parameter-list , ...
2145 parameter-declaration
2146 parameter-list , parameter-declaration
2148 parameter-declaration:
2149 declaration-specifiers declarator attributes[opt]
2150 declaration-specifiers abstract-declarator[opt] attributes[opt]
2154 identifier-list , identifier
2156 abstract-declarator:
2158 pointer[opt] direct-abstract-declarator
2160 direct-abstract-declarator:
2161 ( attributes[opt] abstract-declarator )
2162 direct-abstract-declarator[opt] array-declarator
2163 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2168 direct-declarator ( parameter-forward-declarations
2169 parameter-type-list[opt] )
2171 direct-abstract-declarator:
2172 direct-abstract-declarator[opt] ( parameter-forward-declarations
2173 parameter-type-list[opt] )
2175 parameter-forward-declarations:
2177 parameter-forward-declarations parameter-list ;
2179 The uses of attributes shown above are GNU extensions.
2181 Some forms of array declarator are not included in C99 in the
2182 syntax for abstract declarators; these are disallowed elsewhere.
2183 This may be a defect (DR#289).
2185 This function also accepts an omitted abstract declarator as being
2186 an abstract declarator, although not part of the formal syntax. */
2188 static struct c_declarator
*
2189 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2192 /* Parse any initial pointer part. */
2193 if (c_parser_next_token_is (parser
, CPP_MULT
))
2195 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2196 struct c_declarator
*inner
;
2197 c_parser_consume_token (parser
);
2198 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2199 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2203 return make_pointer_declarator (quals_attrs
, inner
);
2205 /* Now we have a direct declarator, direct abstract declarator or
2206 nothing (which counts as a direct abstract declarator here). */
2207 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2210 /* Parse a direct declarator or direct abstract declarator; arguments
2211 as c_parser_declarator. */
2213 static struct c_declarator
*
2214 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2217 /* The direct declarator must start with an identifier (possibly
2218 omitted) or a parenthesized declarator (possibly abstract). In
2219 an ordinary declarator, initial parentheses must start a
2220 parenthesized declarator. In an abstract declarator or parameter
2221 declarator, they could start a parenthesized declarator or a
2222 parameter list. To tell which, the open parenthesis and any
2223 following attributes must be read. If a declaration specifier
2224 follows, then it is a parameter list; if the specifier is a
2225 typedef name, there might be an ambiguity about redeclaring it,
2226 which is resolved in the direction of treating it as a typedef
2227 name. If a close parenthesis follows, it is also an empty
2228 parameter list, as the syntax does not permit empty abstract
2229 declarators. Otherwise, it is a parenthesized declarator (in
2230 which case the analysis may be repeated inside it, recursively).
2232 ??? There is an ambiguity in a parameter declaration "int
2233 (__attribute__((foo)) x)", where x is not a typedef name: it
2234 could be an abstract declarator for a function, or declare x with
2235 parentheses. The proper resolution of this ambiguity needs
2236 documenting. At present we follow an accident of the old
2237 parser's implementation, whereby the first parameter must have
2238 some declaration specifiers other than just attributes. Thus as
2239 a parameter declaration it is treated as a parenthesized
2240 parameter named x, and as an abstract declarator it is
2243 ??? Also following the old parser, attributes inside an empty
2244 parameter list are ignored, making it a list not yielding a
2245 prototype, rather than giving an error or making it have one
2246 parameter with implicit type int.
2248 ??? Also following the old parser, typedef names may be
2249 redeclared in declarators, but not Objective-C class names. */
2251 if (kind
!= C_DTR_ABSTRACT
2252 && c_parser_next_token_is (parser
, CPP_NAME
)
2254 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2255 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2257 struct c_declarator
*inner
2258 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2260 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2261 c_parser_consume_token (parser
);
2262 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2265 if (kind
!= C_DTR_NORMAL
2266 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2268 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2269 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2272 /* Either we are at the end of an abstract declarator, or we have
2275 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2278 struct c_declarator
*inner
;
2279 c_parser_consume_token (parser
);
2280 attrs
= c_parser_attributes (parser
);
2281 if (kind
!= C_DTR_NORMAL
2282 && (c_parser_next_token_starts_declspecs (parser
)
2283 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2285 struct c_arg_info
*args
2286 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2293 = build_function_declarator (args
,
2294 build_id_declarator (NULL_TREE
));
2295 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2299 /* A parenthesized declarator. */
2300 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2301 if (inner
!= NULL
&& attrs
!= NULL
)
2302 inner
= build_attrs_declarator (attrs
, inner
);
2303 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2305 c_parser_consume_token (parser
);
2309 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2313 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2320 if (kind
== C_DTR_NORMAL
)
2322 c_parser_error (parser
, "expected identifier or %<(%>");
2326 return build_id_declarator (NULL_TREE
);
2330 /* Parse part of a direct declarator or direct abstract declarator,
2331 given that some (in INNER) has already been parsed; ID_PRESENT is
2332 true if an identifier is present, false for an abstract
2335 static struct c_declarator
*
2336 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2337 struct c_declarator
*inner
)
2339 /* Parse a sequence of array declarators and parameter lists. */
2340 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2342 struct c_declarator
*declarator
;
2343 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2347 c_parser_consume_token (parser
);
2348 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2349 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2351 c_parser_consume_token (parser
);
2352 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2353 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2354 if (!quals_attrs
->declspecs_seen_p
)
2356 /* If "static" is present, there must be an array dimension.
2357 Otherwise, there may be a dimension, "*", or no
2362 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2366 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2371 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2373 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2377 c_parser_consume_token (parser
);
2382 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2388 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2391 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2392 c_parser_consume_token (parser
);
2395 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2399 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2401 if (declarator
== NULL
)
2403 inner
= set_array_declarator_inner (declarator
, inner
);
2404 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2406 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2409 struct c_arg_info
*args
;
2410 c_parser_consume_token (parser
);
2411 attrs
= c_parser_attributes (parser
);
2412 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2417 inner
= build_function_declarator (args
, inner
);
2418 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2424 /* Parse a parameter list or identifier list, including the closing
2425 parenthesis but not the opening one. ATTRS are the attributes at
2426 the start of the list. ID_LIST_OK is true if an identifier list is
2427 acceptable; such a list must not have attributes at the start. */
2429 static struct c_arg_info
*
2430 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2433 declare_parm_level ();
2434 /* If the list starts with an identifier, it is an identifier list.
2435 Otherwise, it is either a prototype list or an empty list. */
2438 && c_parser_next_token_is (parser
, CPP_NAME
)
2439 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2441 tree list
= NULL_TREE
, *nextp
= &list
;
2442 while (c_parser_next_token_is (parser
, CPP_NAME
)
2443 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2445 *nextp
= build_tree_list (NULL_TREE
,
2446 c_parser_peek_token (parser
)->value
);
2447 nextp
= & TREE_CHAIN (*nextp
);
2448 c_parser_consume_token (parser
);
2449 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2451 c_parser_consume_token (parser
);
2452 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2454 c_parser_error (parser
, "expected identifier");
2458 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2460 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2465 ret
->pending_sizes
= 0;
2466 ret
->had_vla_unspec
= 0;
2467 c_parser_consume_token (parser
);
2473 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2481 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
2487 /* Parse a parameter list (possibly empty), including the closing
2488 parenthesis but not the opening one. ATTRS are the attributes at
2489 the start of the list. */
2491 static struct c_arg_info
*
2492 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
2494 bool good_parm
= false;
2495 /* ??? Following the old parser, forward parameter declarations may
2496 use abstract declarators, and if no real parameter declarations
2497 follow the forward declarations then this is not diagnosed. Also
2498 note as above that attributes are ignored as the only contents of
2499 the parentheses, or as the only contents after forward
2501 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2503 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2508 ret
->pending_sizes
= 0;
2509 ret
->had_vla_unspec
= 0;
2510 c_parser_consume_token (parser
);
2513 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2515 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2519 ret
->pending_sizes
= 0;
2520 ret
->had_vla_unspec
= 0;
2521 /* Suppress -Wold-style-definition for this case. */
2522 ret
->types
= error_mark_node
;
2523 error_at (c_parser_peek_token (parser
)->location
,
2524 "ISO C requires a named argument before %<...%>");
2525 c_parser_consume_token (parser
);
2526 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2528 c_parser_consume_token (parser
);
2533 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2538 /* Nonempty list of parameters, either terminated with semicolon
2539 (forward declarations; recurse) or with close parenthesis (normal
2540 function) or with ", ... )" (variadic function). */
2543 /* Parse a parameter. */
2544 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2549 push_parm_decl (parm
);
2551 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2554 c_parser_consume_token (parser
);
2555 mark_forward_parm_decls ();
2556 new_attrs
= c_parser_attributes (parser
);
2557 return c_parser_parms_list_declarator (parser
, new_attrs
);
2559 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2561 c_parser_consume_token (parser
);
2563 return get_parm_info (false);
2566 struct c_arg_info
*ret
2567 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2572 ret
->pending_sizes
= 0;
2573 ret
->had_vla_unspec
= 0;
2577 if (!c_parser_require (parser
, CPP_COMMA
,
2578 "expected %<;%>, %<,%> or %<)%>"))
2580 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2581 get_pending_sizes ();
2584 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2586 c_parser_consume_token (parser
);
2587 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2589 c_parser_consume_token (parser
);
2591 return get_parm_info (true);
2594 struct c_arg_info
*ret
2595 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2600 ret
->pending_sizes
= 0;
2601 ret
->had_vla_unspec
= 0;
2607 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2609 get_pending_sizes ();
2616 /* Parse a parameter declaration. ATTRS are the attributes at the
2617 start of the declaration if it is the first parameter. */
2619 static struct c_parm
*
2620 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2622 struct c_declspecs
*specs
;
2623 struct c_declarator
*declarator
;
2625 tree postfix_attrs
= NULL_TREE
;
2627 if (!c_parser_next_token_starts_declspecs (parser
))
2629 /* ??? In some Objective-C cases '...' isn't applicable so there
2630 should be a different message. */
2631 c_parser_error (parser
,
2632 "expected declaration specifiers or %<...%>");
2633 c_parser_skip_to_end_of_parameter (parser
);
2636 specs
= build_null_declspecs ();
2639 declspecs_add_attrs (specs
, attrs
);
2642 c_parser_declspecs (parser
, specs
, true, true, true);
2643 finish_declspecs (specs
);
2644 pending_xref_error ();
2645 prefix_attrs
= specs
->attrs
;
2646 specs
->attrs
= NULL_TREE
;
2647 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2648 C_DTR_PARM
, &dummy
);
2649 if (declarator
== NULL
)
2651 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2654 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2655 postfix_attrs
= c_parser_attributes (parser
);
2656 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2660 /* Parse a string literal in an asm expression. It should not be
2661 translated, and wide string literals are an error although
2662 permitted by the syntax. This is a GNU extension.
2667 ??? At present, following the old parser, the caller needs to have
2668 set lex_untranslated_string to 1. It would be better to follow the
2669 C++ parser rather than using this kludge. */
2672 c_parser_asm_string_literal (c_parser
*parser
)
2675 if (c_parser_next_token_is (parser
, CPP_STRING
))
2677 str
= c_parser_peek_token (parser
)->value
;
2678 c_parser_consume_token (parser
);
2680 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2682 error_at (c_parser_peek_token (parser
)->location
,
2683 "wide string literal in %<asm%>");
2684 str
= build_string (1, "");
2685 c_parser_consume_token (parser
);
2689 c_parser_error (parser
, "expected string literal");
2695 /* Parse a simple asm expression. This is used in restricted
2696 contexts, where a full expression with inputs and outputs does not
2697 make sense. This is a GNU extension.
2700 asm ( asm-string-literal )
2704 c_parser_simple_asm_expr (c_parser
*parser
)
2707 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2708 /* ??? Follow the C++ parser rather than using the
2709 lex_untranslated_string kludge. */
2710 parser
->lex_untranslated_string
= true;
2711 c_parser_consume_token (parser
);
2712 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2714 parser
->lex_untranslated_string
= false;
2717 str
= c_parser_asm_string_literal (parser
);
2718 parser
->lex_untranslated_string
= false;
2719 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2721 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2727 /* Parse (possibly empty) attributes. This is a GNU extension.
2731 attributes attribute
2734 __attribute__ ( ( attribute-list ) )
2738 attribute_list , attrib
2743 any-word ( identifier )
2744 any-word ( identifier , nonempty-expr-list )
2745 any-word ( expr-list )
2747 where the "identifier" must not be declared as a type, and
2748 "any-word" may be any identifier (including one declared as a
2749 type), a reserved word storage class specifier, type specifier or
2750 type qualifier. ??? This still leaves out most reserved keywords
2751 (following the old parser), shouldn't we include them, and why not
2752 allow identifiers declared as types to start the arguments? */
2755 c_parser_attributes (c_parser
*parser
)
2757 tree attrs
= NULL_TREE
;
2758 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2760 /* ??? Follow the C++ parser rather than using the
2761 lex_untranslated_string kludge. */
2762 parser
->lex_untranslated_string
= true;
2763 c_parser_consume_token (parser
);
2764 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2766 parser
->lex_untranslated_string
= false;
2769 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2771 parser
->lex_untranslated_string
= false;
2772 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2775 /* Parse the attribute list. */
2776 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2777 || c_parser_next_token_is (parser
, CPP_NAME
)
2778 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2780 tree attr
, attr_name
, attr_args
;
2781 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2783 c_parser_consume_token (parser
);
2786 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2788 /* ??? See comment above about what keywords are
2791 switch (c_parser_peek_token (parser
)->keyword
)
2828 /* Accept __attribute__((__const)) as __attribute__((const))
2831 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
2834 attr_name
= c_parser_peek_token (parser
)->value
;
2835 c_parser_consume_token (parser
);
2836 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2838 attr
= build_tree_list (attr_name
, NULL_TREE
);
2839 attrs
= chainon (attrs
, attr
);
2842 c_parser_consume_token (parser
);
2843 /* Parse the attribute contents. If they start with an
2844 identifier which is followed by a comma or close
2845 parenthesis, then the arguments start with that
2846 identifier; otherwise they are an expression list. */
2847 if (c_parser_next_token_is (parser
, CPP_NAME
)
2848 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2849 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2850 || (c_parser_peek_2nd_token (parser
)->type
2851 == CPP_CLOSE_PAREN
)))
2853 tree arg1
= c_parser_peek_token (parser
)->value
;
2854 c_parser_consume_token (parser
);
2855 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2856 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2859 c_parser_consume_token (parser
);
2860 attr_args
= tree_cons (NULL_TREE
, arg1
,
2861 c_parser_expr_list (parser
, false));
2866 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2867 attr_args
= NULL_TREE
;
2869 attr_args
= c_parser_expr_list (parser
, false);
2871 attr
= build_tree_list (attr_name
, attr_args
);
2872 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2873 c_parser_consume_token (parser
);
2876 parser
->lex_untranslated_string
= false;
2877 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2881 attrs
= chainon (attrs
, attr
);
2883 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2884 c_parser_consume_token (parser
);
2887 parser
->lex_untranslated_string
= false;
2888 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2892 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2893 c_parser_consume_token (parser
);
2896 parser
->lex_untranslated_string
= false;
2897 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2901 parser
->lex_untranslated_string
= false;
2906 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2909 specifier-qualifier-list abstract-declarator[opt]
2912 static struct c_type_name
*
2913 c_parser_type_name (c_parser
*parser
)
2915 struct c_declspecs
*specs
= build_null_declspecs ();
2916 struct c_declarator
*declarator
;
2917 struct c_type_name
*ret
;
2919 c_parser_declspecs (parser
, specs
, false, true, true);
2920 if (!specs
->declspecs_seen_p
)
2922 c_parser_error (parser
, "expected specifier-qualifier-list");
2925 pending_xref_error ();
2926 finish_declspecs (specs
);
2927 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2928 C_DTR_ABSTRACT
, &dummy
);
2929 if (declarator
== NULL
)
2931 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2933 ret
->declarator
= declarator
;
2937 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2940 assignment-expression
2941 { initializer-list }
2942 { initializer-list , }
2945 designation[opt] initializer
2946 initializer-list , designation[opt] initializer
2953 designator-list designator
2960 [ constant-expression ]
2972 [ constant-expression ... constant-expression ]
2974 Any expression without commas is accepted in the syntax for the
2975 constant-expressions, with non-constant expressions rejected later.
2977 This function is only used for top-level initializers; for nested
2978 ones, see c_parser_initval. */
2980 static struct c_expr
2981 c_parser_initializer (c_parser
*parser
)
2983 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2984 return c_parser_braced_init (parser
, NULL_TREE
, false);
2988 ret
= c_parser_expr_no_commas (parser
, NULL
);
2989 if (TREE_CODE (ret
.value
) != STRING_CST
2990 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
2991 ret
= default_function_array_conversion (ret
);
2996 /* Parse a braced initializer list. TYPE is the type specified for a
2997 compound literal, and NULL_TREE for other initializers and for
2998 nested braced lists. NESTED_P is true for nested braced lists,
2999 false for the list of a compound literal or the list that is the
3000 top-level initializer in a declaration. */
3002 static struct c_expr
3003 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3005 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3006 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3007 c_parser_consume_token (parser
);
3009 push_init_level (0);
3011 really_start_incremental_init (type
);
3012 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3014 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3018 /* Parse a non-empty initializer list, possibly with a trailing
3022 c_parser_initelt (parser
);
3025 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3026 c_parser_consume_token (parser
);
3029 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3033 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3036 ret
.value
= error_mark_node
;
3037 ret
.original_code
= ERROR_MARK
;
3038 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3041 c_parser_consume_token (parser
);
3042 return pop_init_level (0);
3045 /* Parse a nested initializer, including designators. */
3048 c_parser_initelt (c_parser
*parser
)
3050 /* Parse any designator or designator list. A single array
3051 designator may have the subsequent "=" omitted in GNU C, but a
3052 longer list or a structure member designator may not. */
3053 if (c_parser_next_token_is (parser
, CPP_NAME
)
3054 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3056 /* Old-style structure member designator. */
3057 set_init_label (c_parser_peek_token (parser
)->value
);
3058 /* Use the colon as the error location. */
3059 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3060 "obsolete use of designated initializer with %<:%>");
3061 c_parser_consume_token (parser
);
3062 c_parser_consume_token (parser
);
3066 /* des_seen is 0 if there have been no designators, 1 if there
3067 has been a single array designator and 2 otherwise. */
3069 /* Location of a designator. */
3070 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3071 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3072 || c_parser_next_token_is (parser
, CPP_DOT
))
3074 int des_prev
= des_seen
;
3076 des_loc
= c_parser_peek_token (parser
)->location
;
3079 if (c_parser_next_token_is (parser
, CPP_DOT
))
3082 c_parser_consume_token (parser
);
3083 if (c_parser_next_token_is (parser
, CPP_NAME
))
3085 set_init_label (c_parser_peek_token (parser
)->value
);
3086 c_parser_consume_token (parser
);
3091 init
.value
= error_mark_node
;
3092 init
.original_code
= ERROR_MARK
;
3093 c_parser_error (parser
, "expected identifier");
3094 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3095 process_init_element (init
, false);
3102 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3103 /* ??? Following the old parser, [ objc-receiver
3104 objc-message-args ] is accepted as an initializer,
3105 being distinguished from a designator by what follows
3106 the first assignment expression inside the square
3107 brackets, but after a first array designator a
3108 subsequent square bracket is for Objective-C taken to
3109 start an expression, using the obsolete form of
3110 designated initializer without '=', rather than
3111 possibly being a second level of designation: in LALR
3112 terms, the '[' is shifted rather than reducing
3113 designator to designator-list. */
3114 if (des_prev
== 1 && c_dialect_objc ())
3116 des_seen
= des_prev
;
3119 if (des_prev
== 0 && c_dialect_objc ())
3121 /* This might be an array designator or an
3122 Objective-C message expression. If the former,
3123 continue parsing here; if the latter, parse the
3124 remainder of the initializer given the starting
3125 primary-expression. ??? It might make sense to
3126 distinguish when des_prev == 1 as well; see
3127 previous comment. */
3129 struct c_expr mexpr
;
3130 c_parser_consume_token (parser
);
3131 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3132 && ((c_parser_peek_token (parser
)->id_kind
3134 || (c_parser_peek_token (parser
)->id_kind
3135 == C_ID_CLASSNAME
)))
3137 /* Type name receiver. */
3138 tree id
= c_parser_peek_token (parser
)->value
;
3139 c_parser_consume_token (parser
);
3140 rec
= objc_get_class_reference (id
);
3141 goto parse_message_args
;
3143 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3144 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3145 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3146 goto array_desig_after_first
;
3147 /* Expression receiver. So far only one part
3148 without commas has been parsed; there might be
3149 more of the expression. */
3151 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3154 c_parser_consume_token (parser
);
3155 next
= c_parser_expr_no_commas (parser
, NULL
);
3156 next
= default_function_array_conversion (next
);
3157 rec
= build_compound_expr (rec
, next
.value
);
3160 /* Now parse the objc-message-args. */
3161 args
= c_parser_objc_message_args (parser
);
3162 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3165 = objc_build_message_expr (build_tree_list (rec
, args
));
3166 mexpr
.original_code
= ERROR_MARK
;
3167 /* Now parse and process the remainder of the
3168 initializer, starting with this message
3169 expression as a primary-expression. */
3170 c_parser_initval (parser
, &mexpr
);
3173 c_parser_consume_token (parser
);
3174 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3175 array_desig_after_first
:
3176 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3178 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3179 c_parser_consume_token (parser
);
3180 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3184 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3186 c_parser_consume_token (parser
);
3187 set_init_index (first
, second
);
3189 pedwarn (ellipsis_loc
, OPT_pedantic
,
3190 "ISO C forbids specifying range of elements to initialize");
3193 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3199 if (c_parser_next_token_is (parser
, CPP_EQ
))
3202 pedwarn (des_loc
, OPT_pedantic
,
3203 "ISO C90 forbids specifying subobject to initialize");
3204 c_parser_consume_token (parser
);
3209 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3210 "obsolete use of designated initializer without %<=%>");
3214 init
.value
= error_mark_node
;
3215 init
.original_code
= ERROR_MARK
;
3216 c_parser_error (parser
, "expected %<=%>");
3217 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3218 process_init_element (init
, false);
3224 c_parser_initval (parser
, NULL
);
3227 /* Parse a nested initializer; as c_parser_initializer but parses
3228 initializers within braced lists, after any designators have been
3229 applied. If AFTER is not NULL then it is an Objective-C message
3230 expression which is the primary-expression starting the
3234 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3237 gcc_assert (!after
|| c_dialect_objc ());
3238 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3239 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3242 init
= c_parser_expr_no_commas (parser
, after
);
3243 if (init
.value
!= NULL_TREE
3244 && TREE_CODE (init
.value
) != STRING_CST
3245 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3246 init
= default_function_array_conversion (init
);
3248 process_init_element (init
, false);
3251 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3255 { block-item-list[opt] }
3256 { label-declarations block-item-list }
3260 block-item-list block-item
3272 { label-declarations block-item-list }
3275 __extension__ nested-declaration
3276 nested-function-definition
3280 label-declarations label-declaration
3283 __label__ identifier-list ;
3285 Allowing the mixing of declarations and code is new in C99. The
3286 GNU syntax also permits (not shown above) labels at the end of
3287 compound statements, which yield an error. We don't allow labels
3288 on declarations; this might seem like a natural extension, but
3289 there would be a conflict between attributes on the label and
3290 prefix attributes on the declaration. ??? The syntax follows the
3291 old parser in requiring something after label declarations.
3292 Although they are erroneous if the labels declared aren't defined,
3293 is it useful for the syntax to be this way?
3305 c_parser_compound_statement (c_parser
*parser
)
3308 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3309 return error_mark_node
;
3310 stmt
= c_begin_compound_stmt (true);
3311 c_parser_compound_statement_nostart (parser
);
3312 return c_end_compound_stmt (stmt
, true);
3315 /* Parse a compound statement except for the opening brace. This is
3316 used for parsing both compound statements and statement expressions
3317 (which follow different paths to handling the opening). */
3320 c_parser_compound_statement_nostart (c_parser
*parser
)
3322 bool last_stmt
= false;
3323 bool last_label
= false;
3324 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3325 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3327 c_parser_consume_token (parser
);
3330 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3332 location_t err_loc
= c_parser_peek_token (parser
)->location
;
3333 /* Read zero or more forward-declarations for labels that nested
3334 functions can jump to. */
3335 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3337 c_parser_consume_token (parser
);
3338 /* Any identifiers, including those declared as type names,
3343 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3345 c_parser_error (parser
, "expected identifier");
3349 = declare_label (c_parser_peek_token (parser
)->value
);
3350 C_DECLARED_LABEL_FLAG (label
) = 1;
3351 add_stmt (build_stmt (DECL_EXPR
, label
));
3352 c_parser_consume_token (parser
);
3353 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3354 c_parser_consume_token (parser
);
3358 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3360 pedwarn (err_loc
, OPT_pedantic
, "ISO C forbids label declarations");
3362 /* We must now have at least one statement, label or declaration. */
3363 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3365 c_parser_error (parser
, "expected declaration or statement");
3366 c_parser_consume_token (parser
);
3369 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3371 location_t loc
= c_parser_peek_token (parser
)->location
;
3372 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3373 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3374 || (c_parser_next_token_is (parser
, CPP_NAME
)
3375 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3377 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3378 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
3380 label_loc
= c_parser_peek_token (parser
)->location
;
3383 c_parser_label (parser
);
3385 else if (!last_label
3386 && c_parser_next_token_starts_declspecs (parser
))
3389 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3392 (pedantic
&& !flag_isoc99
)
3394 : OPT_Wdeclaration_after_statement
,
3395 "ISO C90 forbids mixed declarations and code");
3398 else if (!last_label
3399 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3401 /* __extension__ can start a declaration, but is also an
3402 unary operator that can start an expression. Consume all
3403 but the last of a possible series of __extension__ to
3405 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3406 && (c_parser_peek_2nd_token (parser
)->keyword
3408 c_parser_consume_token (parser
);
3409 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3412 ext
= disable_extension_diagnostics ();
3413 c_parser_consume_token (parser
);
3415 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3416 /* Following the old parser, __extension__ does not
3417 disable this diagnostic. */
3418 restore_extension_diagnostics (ext
);
3420 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
3422 : OPT_Wdeclaration_after_statement
,
3423 "ISO C90 forbids mixed declarations and code");
3429 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3431 /* External pragmas, and some omp pragmas, are not associated
3432 with regular c code, and so are not to be considered statements
3433 syntactically. This ensures that the user doesn't put them
3434 places that would turn into syntax errors if the directive
3436 if (c_parser_pragma (parser
, pragma_compound
))
3437 last_label
= false, last_stmt
= true;
3439 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3441 c_parser_error (parser
, "expected declaration or statement");
3444 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3446 if (parser
->in_if_block
)
3448 error_at (loc
, """expected %<}%> before %<else%>");
3453 error_at (loc
, "%<else%> without a previous %<if%>");
3454 c_parser_consume_token (parser
);
3463 c_parser_statement_after_labels (parser
);
3466 parser
->error
= false;
3469 error_at (label_loc
, "label at end of compound statement");
3470 c_parser_consume_token (parser
);
3473 /* Parse a label (C90 6.6.1, C99 6.8.1).
3476 identifier : attributes[opt]
3477 case constant-expression :
3483 case constant-expression ... constant-expression :
3485 The use of attributes on labels is a GNU extension. The syntax in
3486 GNU C accepts any expressions without commas, non-constant
3487 expressions being rejected later. */
3490 c_parser_label (c_parser
*parser
)
3492 location_t loc1
= c_parser_peek_token (parser
)->location
;
3493 tree label
= NULL_TREE
;
3494 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3497 c_parser_consume_token (parser
);
3498 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3499 if (c_parser_next_token_is (parser
, CPP_COLON
))
3501 c_parser_consume_token (parser
);
3502 label
= do_case (exp1
, NULL_TREE
);
3504 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3506 c_parser_consume_token (parser
);
3507 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3508 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3509 label
= do_case (exp1
, exp2
);
3512 c_parser_error (parser
, "expected %<:%> or %<...%>");
3514 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3516 c_parser_consume_token (parser
);
3517 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3518 label
= do_case (NULL_TREE
, NULL_TREE
);
3522 tree name
= c_parser_peek_token (parser
)->value
;
3525 location_t loc2
= c_parser_peek_token (parser
)->location
;
3526 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3527 c_parser_consume_token (parser
);
3528 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3529 c_parser_consume_token (parser
);
3530 attrs
= c_parser_attributes (parser
);
3531 tlab
= define_label (loc2
, name
);
3534 decl_attributes (&tlab
, attrs
, 0);
3535 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3540 SET_EXPR_LOCATION (label
, loc1
);
3541 if (c_parser_next_token_starts_declspecs (parser
)
3542 && !(c_parser_next_token_is (parser
, CPP_NAME
)
3543 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3545 error_at (c_parser_peek_token (parser
)->location
,
3546 "a label can only be part of a statement and "
3547 "a declaration is not a statement");
3548 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
3549 /*nested*/ true, /*empty_ok*/ false,
3550 /*start_attr_ok*/ true);
3555 /* Parse a statement (C90 6.6, C99 6.8).
3560 expression-statement
3568 expression-statement:
3571 selection-statement:
3575 iteration-statement:
3584 return expression[opt] ;
3597 objc-throw-statement
3598 objc-try-catch-statement
3599 objc-synchronized-statement
3601 objc-throw-statement:
3615 parallel-for-construct
3616 parallel-sections-construct
3623 parallel-directive structured-block
3626 for-directive iteration-statement
3629 sections-directive section-scope
3632 single-directive structured-block
3634 parallel-for-construct:
3635 parallel-for-directive iteration-statement
3637 parallel-sections-construct:
3638 parallel-sections-directive section-scope
3641 master-directive structured-block
3644 critical-directive structured-block
3647 atomic-directive expression-statement
3650 ordered-directive structured-block */
3653 c_parser_statement (c_parser
*parser
)
3655 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3656 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3657 || (c_parser_next_token_is (parser
, CPP_NAME
)
3658 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3659 c_parser_label (parser
);
3660 c_parser_statement_after_labels (parser
);
3663 /* Parse a statement, other than a labeled statement. */
3666 c_parser_statement_after_labels (c_parser
*parser
)
3668 location_t loc
= c_parser_peek_token (parser
)->location
;
3669 tree stmt
= NULL_TREE
;
3670 bool in_if_block
= parser
->in_if_block
;
3671 parser
->in_if_block
= false;
3672 switch (c_parser_peek_token (parser
)->type
)
3674 case CPP_OPEN_BRACE
:
3675 add_stmt (c_parser_compound_statement (parser
));
3678 switch (c_parser_peek_token (parser
)->keyword
)
3681 c_parser_if_statement (parser
);
3684 c_parser_switch_statement (parser
);
3687 c_parser_while_statement (parser
);
3690 c_parser_do_statement (parser
);
3693 c_parser_for_statement (parser
);
3696 c_parser_consume_token (parser
);
3697 if (c_parser_next_token_is (parser
, CPP_NAME
))
3699 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3700 c_parser_consume_token (parser
);
3702 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3704 c_parser_consume_token (parser
);
3705 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3708 c_parser_error (parser
, "expected identifier or %<*%>");
3709 goto expect_semicolon
;
3711 c_parser_consume_token (parser
);
3712 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3713 goto expect_semicolon
;
3715 c_parser_consume_token (parser
);
3716 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3717 goto expect_semicolon
;
3719 c_parser_consume_token (parser
);
3720 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3722 stmt
= c_finish_return (NULL_TREE
);
3723 c_parser_consume_token (parser
);
3727 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3728 goto expect_semicolon
;
3732 stmt
= c_parser_asm_statement (parser
);
3735 gcc_assert (c_dialect_objc ());
3736 c_parser_consume_token (parser
);
3737 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3739 stmt
= objc_build_throw_stmt (NULL_TREE
);
3740 c_parser_consume_token (parser
);
3745 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3746 goto expect_semicolon
;
3750 gcc_assert (c_dialect_objc ());
3751 c_parser_objc_try_catch_statement (parser
);
3753 case RID_AT_SYNCHRONIZED
:
3754 gcc_assert (c_dialect_objc ());
3755 c_parser_objc_synchronized_statement (parser
);
3762 c_parser_consume_token (parser
);
3764 case CPP_CLOSE_PAREN
:
3765 case CPP_CLOSE_SQUARE
:
3766 /* Avoid infinite loop in error recovery:
3767 c_parser_skip_until_found stops at a closing nesting
3768 delimiter without consuming it, but here we need to consume
3769 it to proceed further. */
3770 c_parser_error (parser
, "expected statement");
3771 c_parser_consume_token (parser
);
3774 c_parser_pragma (parser
, pragma_stmt
);
3778 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3780 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3783 /* Two cases cannot and do not have line numbers associated: If stmt
3784 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3785 cannot hold line numbers. But that's OK because the statement
3786 will either be changed to a MODIFY_EXPR during gimplification of
3787 the statement expr, or discarded. If stmt was compound, but
3788 without new variables, we will have skipped the creation of a
3789 BIND and will have a bare STATEMENT_LIST. But that's OK because
3790 (recursively) all of the component statements should already have
3791 line numbers assigned. ??? Can we discard no-op statements
3793 protected_set_expr_location (stmt
, loc
);
3795 parser
->in_if_block
= in_if_block
;
3798 /* Parse the condition from an if, do, while or for statements. */
3801 c_parser_condition (c_parser
*parser
)
3805 loc
= c_parser_peek_token (parser
)->location
;
3806 cond
= c_objc_common_truthvalue_conversion
3807 (loc
, c_parser_expression_conv (parser
).value
);
3808 protected_set_expr_location (cond
, loc
);
3809 if (warn_sequence_point
)
3810 verify_sequence_points (cond
);
3814 /* Parse a parenthesized condition from an if, do or while statement.
3820 c_parser_paren_condition (c_parser
*parser
)
3823 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3824 return error_mark_node
;
3825 cond
= c_parser_condition (parser
);
3826 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3830 /* Parse a statement which is a block in C99. */
3833 c_parser_c99_block_statement (c_parser
*parser
)
3835 tree block
= c_begin_compound_stmt (flag_isoc99
);
3836 c_parser_statement (parser
);
3837 return c_end_compound_stmt (block
, flag_isoc99
);
3840 /* Parse the body of an if statement. This is just parsing a
3841 statement but (a) it is a block in C99, (b) we track whether the
3842 body is an if statement for the sake of -Wparentheses warnings, (c)
3843 we handle an empty body specially for the sake of -Wempty-body
3844 warnings, and (d) we call parser_compound_statement directly
3845 because c_parser_statement_after_labels resets
3846 parser->in_if_block. */
3849 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3851 tree block
= c_begin_compound_stmt (flag_isoc99
);
3852 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3853 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3854 || (c_parser_next_token_is (parser
, CPP_NAME
)
3855 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3856 c_parser_label (parser
);
3857 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3858 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3860 location_t loc
= c_parser_peek_token (parser
)->location
;
3861 add_stmt (build_empty_stmt ());
3862 c_parser_consume_token (parser
);
3863 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3864 warning_at (loc
, OPT_Wempty_body
,
3865 "suggest braces around empty body in an %<if%> statement");
3867 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3868 add_stmt (c_parser_compound_statement (parser
));
3870 c_parser_statement_after_labels (parser
);
3871 return c_end_compound_stmt (block
, flag_isoc99
);
3874 /* Parse the else body of an if statement. This is just parsing a
3875 statement but (a) it is a block in C99, (b) we handle an empty body
3876 specially for the sake of -Wempty-body warnings. */
3879 c_parser_else_body (c_parser
*parser
)
3881 tree block
= c_begin_compound_stmt (flag_isoc99
);
3882 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3883 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3884 || (c_parser_next_token_is (parser
, CPP_NAME
)
3885 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3886 c_parser_label (parser
);
3887 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3889 warning_at (c_parser_peek_token (parser
)->location
,
3891 "suggest braces around empty body in an %<else%> statement");
3892 add_stmt (build_empty_stmt ());
3893 c_parser_consume_token (parser
);
3896 c_parser_statement_after_labels (parser
);
3897 return c_end_compound_stmt (block
, flag_isoc99
);
3900 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3903 if ( expression ) statement
3904 if ( expression ) statement else statement
3908 c_parser_if_statement (c_parser
*parser
)
3913 bool first_if
= false;
3914 tree first_body
, second_body
;
3917 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3918 c_parser_consume_token (parser
);
3919 block
= c_begin_compound_stmt (flag_isoc99
);
3920 loc
= c_parser_peek_token (parser
)->location
;
3921 cond
= c_parser_paren_condition (parser
);
3922 in_if_block
= parser
->in_if_block
;
3923 parser
->in_if_block
= true;
3924 first_body
= c_parser_if_body (parser
, &first_if
);
3925 parser
->in_if_block
= in_if_block
;
3926 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3928 c_parser_consume_token (parser
);
3929 second_body
= c_parser_else_body (parser
);
3932 second_body
= NULL_TREE
;
3933 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3934 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3937 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3940 switch (expression) statement
3944 c_parser_switch_statement (c_parser
*parser
)
3946 tree block
, expr
, body
, save_break
;
3947 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3948 c_parser_consume_token (parser
);
3949 block
= c_begin_compound_stmt (flag_isoc99
);
3950 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3952 expr
= c_parser_expression (parser
).value
;
3953 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3956 expr
= error_mark_node
;
3957 c_start_case (expr
);
3958 save_break
= c_break_label
;
3959 c_break_label
= NULL_TREE
;
3960 body
= c_parser_c99_block_statement (parser
);
3961 c_finish_case (body
);
3963 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3964 c_break_label
= save_break
;
3965 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3968 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3971 while (expression) statement
3975 c_parser_while_statement (c_parser
*parser
)
3977 tree block
, cond
, body
, save_break
, save_cont
;
3979 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3980 c_parser_consume_token (parser
);
3981 block
= c_begin_compound_stmt (flag_isoc99
);
3982 loc
= c_parser_peek_token (parser
)->location
;
3983 cond
= c_parser_paren_condition (parser
);
3984 save_break
= c_break_label
;
3985 c_break_label
= NULL_TREE
;
3986 save_cont
= c_cont_label
;
3987 c_cont_label
= NULL_TREE
;
3988 body
= c_parser_c99_block_statement (parser
);
3989 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3990 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3991 c_break_label
= save_break
;
3992 c_cont_label
= save_cont
;
3995 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3998 do statement while ( expression ) ;
4002 c_parser_do_statement (c_parser
*parser
)
4004 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4006 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4007 c_parser_consume_token (parser
);
4008 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4009 warning_at (c_parser_peek_token (parser
)->location
,
4011 "suggest braces around empty body in %<do%> statement");
4012 block
= c_begin_compound_stmt (flag_isoc99
);
4013 loc
= c_parser_peek_token (parser
)->location
;
4014 save_break
= c_break_label
;
4015 c_break_label
= NULL_TREE
;
4016 save_cont
= c_cont_label
;
4017 c_cont_label
= NULL_TREE
;
4018 body
= c_parser_c99_block_statement (parser
);
4019 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4020 new_break
= c_break_label
;
4021 c_break_label
= save_break
;
4022 new_cont
= c_cont_label
;
4023 c_cont_label
= save_cont
;
4024 cond
= c_parser_paren_condition (parser
);
4025 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4026 c_parser_skip_to_end_of_block_or_statement (parser
);
4027 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4028 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4031 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4034 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4035 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4037 The form with a declaration is new in C99.
4039 ??? In accordance with the old parser, the declaration may be a
4040 nested function, which is then rejected in check_for_loop_decls,
4041 but does it make any sense for this to be included in the grammar?
4042 Note in particular that the nested function does not include a
4043 trailing ';', whereas the "declaration" production includes one.
4044 Also, can we reject bad declarations earlier and cheaper than
4045 check_for_loop_decls? */
4048 c_parser_for_statement (c_parser
*parser
)
4050 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4052 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4053 loc
= c_parser_peek_token (parser
)->location
;
4054 c_parser_consume_token (parser
);
4055 block
= c_begin_compound_stmt (flag_isoc99
);
4056 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4058 /* Parse the initialization declaration or expression. */
4059 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4061 c_parser_consume_token (parser
);
4062 c_finish_expr_stmt (NULL_TREE
);
4064 else if (c_parser_next_token_starts_declspecs (parser
))
4066 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4067 check_for_loop_decls ();
4069 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4071 /* __extension__ can start a declaration, but is also an
4072 unary operator that can start an expression. Consume all
4073 but the last of a possible series of __extension__ to
4075 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4076 && (c_parser_peek_2nd_token (parser
)->keyword
4078 c_parser_consume_token (parser
);
4079 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4082 ext
= disable_extension_diagnostics ();
4083 c_parser_consume_token (parser
);
4084 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4085 restore_extension_diagnostics (ext
);
4086 check_for_loop_decls ();
4094 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4095 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4097 /* Parse the loop condition. */
4098 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4100 c_parser_consume_token (parser
);
4105 cond
= c_parser_condition (parser
);
4106 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4108 /* Parse the increment expression. */
4109 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4110 incr
= c_process_expr_stmt (NULL_TREE
);
4112 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4113 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4117 cond
= error_mark_node
;
4118 incr
= error_mark_node
;
4120 save_break
= c_break_label
;
4121 c_break_label
= NULL_TREE
;
4122 save_cont
= c_cont_label
;
4123 c_cont_label
= NULL_TREE
;
4124 body
= c_parser_c99_block_statement (parser
);
4125 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4126 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4127 c_break_label
= save_break
;
4128 c_cont_label
= save_cont
;
4131 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4132 statement with inputs, outputs, clobbers, and volatile tag
4136 asm type-qualifier[opt] ( asm-argument ) ;
4140 asm-string-literal : asm-operands[opt]
4141 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4142 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4144 Qualifiers other than volatile are accepted in the syntax but
4148 c_parser_asm_statement (c_parser
*parser
)
4150 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4152 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4153 c_parser_consume_token (parser
);
4154 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4156 quals
= c_parser_peek_token (parser
)->value
;
4157 c_parser_consume_token (parser
);
4159 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4160 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4162 warning_at (c_parser_peek_token (parser
)->location
,
4164 "%E qualifier ignored on asm",
4165 c_parser_peek_token (parser
)->value
);
4167 c_parser_consume_token (parser
);
4171 /* ??? Follow the C++ parser rather than using the
4172 lex_untranslated_string kludge. */
4173 parser
->lex_untranslated_string
= true;
4174 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4176 parser
->lex_untranslated_string
= false;
4179 str
= c_parser_asm_string_literal (parser
);
4180 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4183 outputs
= NULL_TREE
;
4185 clobbers
= NULL_TREE
;
4188 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4190 parser
->lex_untranslated_string
= false;
4191 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4195 /* Parse outputs. */
4196 if (c_parser_next_token_is (parser
, CPP_COLON
)
4197 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4198 outputs
= NULL_TREE
;
4200 outputs
= c_parser_asm_operands (parser
, false);
4201 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4204 clobbers
= NULL_TREE
;
4207 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4209 parser
->lex_untranslated_string
= false;
4210 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4214 if (c_parser_next_token_is (parser
, CPP_COLON
)
4215 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4218 inputs
= c_parser_asm_operands (parser
, true);
4219 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4221 clobbers
= NULL_TREE
;
4224 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4226 parser
->lex_untranslated_string
= false;
4227 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4230 /* Parse clobbers. */
4231 clobbers
= c_parser_asm_clobbers (parser
);
4233 parser
->lex_untranslated_string
= false;
4234 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4236 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4239 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4240 c_parser_skip_to_end_of_block_or_statement (parser
);
4241 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4246 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4247 not outputs), apply the default conversion of functions and arrays
4252 asm-operands , asm-operand
4255 asm-string-literal ( expression )
4256 [ identifier ] asm-string-literal ( expression )
4260 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4262 tree list
= NULL_TREE
;
4267 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4269 c_parser_consume_token (parser
);
4270 if (c_parser_next_token_is (parser
, CPP_NAME
))
4272 tree id
= c_parser_peek_token (parser
)->value
;
4273 c_parser_consume_token (parser
);
4274 name
= build_string (IDENTIFIER_LENGTH (id
),
4275 IDENTIFIER_POINTER (id
));
4279 c_parser_error (parser
, "expected identifier");
4280 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4283 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4288 str
= c_parser_asm_string_literal (parser
);
4289 if (str
== NULL_TREE
)
4291 parser
->lex_untranslated_string
= false;
4292 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4294 parser
->lex_untranslated_string
= true;
4297 expr
= c_parser_expression (parser
);
4299 expr
= default_function_array_conversion (expr
);
4300 parser
->lex_untranslated_string
= true;
4301 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4303 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4306 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4308 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4309 c_parser_consume_token (parser
);
4316 /* Parse asm clobbers, a GNU extension.
4320 asm-clobbers , asm-string-literal
4324 c_parser_asm_clobbers (c_parser
*parser
)
4326 tree list
= NULL_TREE
;
4329 tree str
= c_parser_asm_string_literal (parser
);
4331 list
= tree_cons (NULL_TREE
, str
, list
);
4334 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4335 c_parser_consume_token (parser
);
4342 /* Parse an expression other than a compound expression; that is, an
4343 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4344 NULL then it is an Objective-C message expression which is the
4345 primary-expression starting the expression as an initializer.
4347 assignment-expression:
4348 conditional-expression
4349 unary-expression assignment-operator assignment-expression
4351 assignment-operator: one of
4352 = *= /= %= += -= <<= >>= &= ^= |=
4354 In GNU C we accept any conditional expression on the LHS and
4355 diagnose the invalid lvalue rather than producing a syntax
4358 static struct c_expr
4359 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4361 struct c_expr lhs
, rhs
, ret
;
4362 enum tree_code code
;
4363 location_t op_location
;
4364 gcc_assert (!after
|| c_dialect_objc ());
4365 lhs
= c_parser_conditional_expression (parser
, after
);
4366 op_location
= c_parser_peek_token (parser
)->location
;
4367 switch (c_parser_peek_token (parser
)->type
)
4376 code
= TRUNC_DIV_EXPR
;
4379 code
= TRUNC_MOD_EXPR
;
4394 code
= BIT_AND_EXPR
;
4397 code
= BIT_XOR_EXPR
;
4400 code
= BIT_IOR_EXPR
;
4405 c_parser_consume_token (parser
);
4406 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4407 rhs
= default_function_array_conversion (rhs
);
4408 ret
.value
= build_modify_expr (op_location
, lhs
.value
, code
, rhs
.value
);
4409 if (code
== NOP_EXPR
)
4410 ret
.original_code
= MODIFY_EXPR
;
4413 TREE_NO_WARNING (ret
.value
) = 1;
4414 ret
.original_code
= ERROR_MARK
;
4419 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4420 is not NULL then it is an Objective-C message expression which is
4421 the primary-expression starting the expression as an initializer.
4423 conditional-expression:
4424 logical-OR-expression
4425 logical-OR-expression ? expression : conditional-expression
4429 conditional-expression:
4430 logical-OR-expression ? : conditional-expression
4433 static struct c_expr
4434 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4436 struct c_expr cond
, exp1
, exp2
, ret
;
4437 location_t cond_loc
;
4439 gcc_assert (!after
|| c_dialect_objc ());
4441 cond_loc
= c_parser_peek_token (parser
)->location
;
4442 cond
= c_parser_binary_expression (parser
, after
);
4443 protected_set_expr_location (cond
.value
, cond_loc
);
4445 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4447 cond
= default_function_array_conversion (cond
);
4448 c_parser_consume_token (parser
);
4449 if (c_parser_next_token_is (parser
, CPP_COLON
))
4451 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
4452 "ISO C forbids omitting the middle term of a ?: expression");
4453 /* Make sure first operand is calculated only once. */
4454 exp1
.value
= save_expr (default_conversion (cond
.value
));
4455 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
4456 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4461 = c_objc_common_truthvalue_conversion
4462 (cond_loc
, default_conversion (cond
.value
));
4463 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4464 exp1
= c_parser_expression_conv (parser
);
4465 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4466 - (cond
.value
== truthvalue_false_node
));
4468 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4470 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4471 ret
.value
= error_mark_node
;
4472 ret
.original_code
= ERROR_MARK
;
4475 exp2
= c_parser_conditional_expression (parser
, NULL
);
4476 exp2
= default_function_array_conversion (exp2
);
4477 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4478 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4479 ret
.original_code
= ERROR_MARK
;
4483 /* Parse a binary expression; that is, a logical-OR-expression (C90
4484 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4485 an Objective-C message expression which is the primary-expression
4486 starting the expression as an initializer.
4488 multiplicative-expression:
4490 multiplicative-expression * cast-expression
4491 multiplicative-expression / cast-expression
4492 multiplicative-expression % cast-expression
4494 additive-expression:
4495 multiplicative-expression
4496 additive-expression + multiplicative-expression
4497 additive-expression - multiplicative-expression
4501 shift-expression << additive-expression
4502 shift-expression >> additive-expression
4504 relational-expression:
4506 relational-expression < shift-expression
4507 relational-expression > shift-expression
4508 relational-expression <= shift-expression
4509 relational-expression >= shift-expression
4511 equality-expression:
4512 relational-expression
4513 equality-expression == relational-expression
4514 equality-expression != relational-expression
4518 AND-expression & equality-expression
4520 exclusive-OR-expression:
4522 exclusive-OR-expression ^ AND-expression
4524 inclusive-OR-expression:
4525 exclusive-OR-expression
4526 inclusive-OR-expression | exclusive-OR-expression
4528 logical-AND-expression:
4529 inclusive-OR-expression
4530 logical-AND-expression && inclusive-OR-expression
4532 logical-OR-expression:
4533 logical-AND-expression
4534 logical-OR-expression || logical-AND-expression
4537 static struct c_expr
4538 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4540 /* A binary expression is parsed using operator-precedence parsing,
4541 with the operands being cast expressions. All the binary
4542 operators are left-associative. Thus a binary expression is of
4545 E0 op1 E1 op2 E2 ...
4547 which we represent on a stack. On the stack, the precedence
4548 levels are strictly increasing. When a new operator is
4549 encountered of higher precedence than that at the top of the
4550 stack, it is pushed; its LHS is the top expression, and its RHS
4551 is everything parsed until it is popped. When a new operator is
4552 encountered with precedence less than or equal to that at the top
4553 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4554 by the result of the operation until the operator at the top of
4555 the stack has lower precedence than the new operator or there is
4556 only one element on the stack; then the top expression is the LHS
4557 of the new operator. In the case of logical AND and OR
4558 expressions, we also need to adjust skip_evaluation as
4559 appropriate when the operators are pushed and popped. */
4561 /* The precedence levels, where 0 is a dummy lowest level used for
4562 the bottom of the stack. */
4578 /* The expression at this stack level. */
4580 /* The precedence of the operator on its left, PREC_NONE at the
4581 bottom of the stack. */
4583 /* The operation on its left. */
4587 /* Location of the binary operator. */
4588 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
4591 switch (stack[sp].op) \
4593 case TRUTH_ANDIF_EXPR: \
4594 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4596 case TRUTH_ORIF_EXPR: \
4597 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4602 stack[sp - 1].expr \
4603 = default_function_array_conversion (stack[sp - 1].expr); \
4605 = default_function_array_conversion (stack[sp].expr); \
4606 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4608 stack[sp - 1].expr, \
4612 gcc_assert (!after
|| c_dialect_objc ());
4613 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4614 stack
[0].prec
= PREC_NONE
;
4619 enum tree_code ocode
;
4622 switch (c_parser_peek_token (parser
)->type
)
4630 ocode
= TRUNC_DIV_EXPR
;
4634 ocode
= TRUNC_MOD_EXPR
;
4646 ocode
= LSHIFT_EXPR
;
4650 ocode
= RSHIFT_EXPR
;
4664 case CPP_GREATER_EQ
:
4677 oprec
= PREC_BITAND
;
4678 ocode
= BIT_AND_EXPR
;
4681 oprec
= PREC_BITXOR
;
4682 ocode
= BIT_XOR_EXPR
;
4686 ocode
= BIT_IOR_EXPR
;
4689 oprec
= PREC_LOGAND
;
4690 ocode
= TRUTH_ANDIF_EXPR
;
4694 ocode
= TRUTH_ORIF_EXPR
;
4697 /* Not a binary operator, so end of the binary
4701 binary_loc
= c_parser_peek_token (parser
)->location
;
4702 c_parser_consume_token (parser
);
4703 while (oprec
<= stack
[sp
].prec
)
4707 case TRUTH_ANDIF_EXPR
:
4709 = default_function_array_conversion (stack
[sp
].expr
);
4710 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4711 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4712 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4714 case TRUTH_ORIF_EXPR
:
4716 = default_function_array_conversion (stack
[sp
].expr
);
4717 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4718 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4719 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4725 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4726 stack
[sp
].prec
= oprec
;
4727 stack
[sp
].op
= ocode
;
4732 return stack
[0].expr
;
4736 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4737 NULL then it is an Objective-C message expression which is the
4738 primary-expression starting the expression as an initializer.
4742 ( type-name ) unary-expression
4745 static struct c_expr
4746 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4748 gcc_assert (!after
|| c_dialect_objc ());
4750 return c_parser_postfix_expression_after_primary (parser
, *after
);
4751 /* If the expression begins with a parenthesized type name, it may
4752 be either a cast or a compound literal; we need to see whether
4753 the next character is '{' to tell the difference. If not, it is
4754 an unary expression. */
4755 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4756 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4758 struct c_type_name
*type_name
;
4761 c_parser_consume_token (parser
);
4762 type_name
= c_parser_type_name (parser
);
4763 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4764 if (type_name
== NULL
)
4766 ret
.value
= error_mark_node
;
4767 ret
.original_code
= ERROR_MARK
;
4771 /* Save casted types in the function's used types hash table. */
4772 used_types_insert (type_name
->specs
->type
);
4774 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4775 return c_parser_postfix_expression_after_paren_type (parser
,
4777 expr
= c_parser_cast_expression (parser
, NULL
);
4778 expr
= default_function_array_conversion (expr
);
4779 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4780 ret
.original_code
= ERROR_MARK
;
4784 return c_parser_unary_expression (parser
);
4787 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4793 unary-operator cast-expression
4794 sizeof unary-expression
4795 sizeof ( type-name )
4797 unary-operator: one of
4803 __alignof__ unary-expression
4804 __alignof__ ( type-name )
4807 unary-operator: one of
4808 __extension__ __real__ __imag__
4810 In addition, the GNU syntax treats ++ and -- as unary operators, so
4811 they may be applied to cast expressions with errors for non-lvalues
4814 static struct c_expr
4815 c_parser_unary_expression (c_parser
*parser
)
4818 struct c_expr ret
, op
;
4819 location_t loc
= c_parser_peek_token (parser
)->location
;
4820 switch (c_parser_peek_token (parser
)->type
)
4823 c_parser_consume_token (parser
);
4824 op
= c_parser_cast_expression (parser
, NULL
);
4825 op
= default_function_array_conversion (op
);
4826 return parser_build_unary_op (PREINCREMENT_EXPR
, op
, loc
);
4827 case CPP_MINUS_MINUS
:
4828 c_parser_consume_token (parser
);
4829 op
= c_parser_cast_expression (parser
, NULL
);
4830 op
= default_function_array_conversion (op
);
4831 return parser_build_unary_op (PREDECREMENT_EXPR
, op
, loc
);
4833 c_parser_consume_token (parser
);
4834 return parser_build_unary_op (ADDR_EXPR
,
4835 c_parser_cast_expression (parser
, NULL
),
4838 c_parser_consume_token (parser
);
4839 op
= c_parser_cast_expression (parser
, NULL
);
4840 op
= default_function_array_conversion (op
);
4841 ret
.value
= build_indirect_ref (loc
, op
.value
, "unary *");
4842 ret
.original_code
= ERROR_MARK
;
4845 if (!c_dialect_objc () && !in_system_header
)
4846 warning_at (c_parser_peek_token (parser
)->location
,
4848 "traditional C rejects the unary plus operator");
4849 c_parser_consume_token (parser
);
4850 op
= c_parser_cast_expression (parser
, NULL
);
4851 op
= default_function_array_conversion (op
);
4852 return parser_build_unary_op (CONVERT_EXPR
, op
, loc
);
4854 c_parser_consume_token (parser
);
4855 op
= c_parser_cast_expression (parser
, NULL
);
4856 op
= default_function_array_conversion (op
);
4857 return parser_build_unary_op (NEGATE_EXPR
, op
, loc
);
4859 c_parser_consume_token (parser
);
4860 op
= c_parser_cast_expression (parser
, NULL
);
4861 op
= default_function_array_conversion (op
);
4862 return parser_build_unary_op (BIT_NOT_EXPR
, op
, loc
);
4864 c_parser_consume_token (parser
);
4865 op
= c_parser_cast_expression (parser
, NULL
);
4866 op
= default_function_array_conversion (op
);
4867 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
, loc
);
4869 /* Refer to the address of a label as a pointer. */
4870 c_parser_consume_token (parser
);
4871 if (c_parser_next_token_is (parser
, CPP_NAME
))
4873 ret
.value
= finish_label_address_expr
4874 (c_parser_peek_token (parser
)->value
, loc
);
4875 c_parser_consume_token (parser
);
4879 c_parser_error (parser
, "expected identifier");
4880 ret
.value
= error_mark_node
;
4882 ret
.original_code
= ERROR_MARK
;
4885 switch (c_parser_peek_token (parser
)->keyword
)
4888 return c_parser_sizeof_expression (parser
);
4890 return c_parser_alignof_expression (parser
);
4892 c_parser_consume_token (parser
);
4893 ext
= disable_extension_diagnostics ();
4894 ret
= c_parser_cast_expression (parser
, NULL
);
4895 restore_extension_diagnostics (ext
);
4898 c_parser_consume_token (parser
);
4899 op
= c_parser_cast_expression (parser
, NULL
);
4900 op
= default_function_array_conversion (op
);
4901 return parser_build_unary_op (REALPART_EXPR
, op
, loc
);
4903 c_parser_consume_token (parser
);
4904 op
= c_parser_cast_expression (parser
, NULL
);
4905 op
= default_function_array_conversion (op
);
4906 return parser_build_unary_op (IMAGPART_EXPR
, op
, loc
);
4908 return c_parser_postfix_expression (parser
);
4911 return c_parser_postfix_expression (parser
);
4915 /* Parse a sizeof expression. */
4917 static struct c_expr
4918 c_parser_sizeof_expression (c_parser
*parser
)
4921 location_t expr_loc
;
4922 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4923 c_parser_consume_token (parser
);
4926 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4927 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4929 /* Either sizeof ( type-name ) or sizeof unary-expression
4930 starting with a compound literal. */
4931 struct c_type_name
*type_name
;
4932 c_parser_consume_token (parser
);
4933 expr_loc
= c_parser_peek_token (parser
)->location
;
4934 type_name
= c_parser_type_name (parser
);
4935 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4936 if (type_name
== NULL
)
4941 ret
.value
= error_mark_node
;
4942 ret
.original_code
= ERROR_MARK
;
4945 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4947 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4951 /* sizeof ( type-name ). */
4954 return c_expr_sizeof_type (type_name
);
4958 expr_loc
= c_parser_peek_token (parser
)->location
;
4959 expr
= c_parser_unary_expression (parser
);
4963 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4964 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4965 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
4966 return c_expr_sizeof_expr (expr
);
4970 /* Parse an alignof expression. */
4972 static struct c_expr
4973 c_parser_alignof_expression (c_parser
*parser
)
4976 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4977 c_parser_consume_token (parser
);
4980 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4981 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4983 /* Either __alignof__ ( type-name ) or __alignof__
4984 unary-expression starting with a compound literal. */
4985 struct c_type_name
*type_name
;
4987 c_parser_consume_token (parser
);
4988 type_name
= c_parser_type_name (parser
);
4989 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4990 if (type_name
== NULL
)
4995 ret
.value
= error_mark_node
;
4996 ret
.original_code
= ERROR_MARK
;
4999 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5001 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5005 /* alignof ( type-name ). */
5008 ret
.value
= c_alignof (groktypename (type_name
));
5009 ret
.original_code
= ERROR_MARK
;
5015 expr
= c_parser_unary_expression (parser
);
5019 ret
.value
= c_alignof_expr (expr
.value
);
5020 ret
.original_code
= ERROR_MARK
;
5025 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5029 postfix-expression [ expression ]
5030 postfix-expression ( argument-expression-list[opt] )
5031 postfix-expression . identifier
5032 postfix-expression -> identifier
5033 postfix-expression ++
5034 postfix-expression --
5035 ( type-name ) { initializer-list }
5036 ( type-name ) { initializer-list , }
5038 argument-expression-list:
5040 argument-expression-list , argument-expression
5052 (treated as a keyword in GNU C)
5055 ( compound-statement )
5056 __builtin_va_arg ( assignment-expression , type-name )
5057 __builtin_offsetof ( type-name , offsetof-member-designator )
5058 __builtin_choose_expr ( assignment-expression ,
5059 assignment-expression ,
5060 assignment-expression )
5061 __builtin_types_compatible_p ( type-name , type-name )
5063 offsetof-member-designator:
5065 offsetof-member-designator . identifier
5066 offsetof-member-designator [ expression ]
5071 [ objc-receiver objc-message-args ]
5072 @selector ( objc-selector-arg )
5073 @protocol ( identifier )
5074 @encode ( type-name )
5078 static struct c_expr
5079 c_parser_postfix_expression (c_parser
*parser
)
5081 struct c_expr expr
, e1
, e2
, e3
;
5082 struct c_type_name
*t1
, *t2
;
5084 switch (c_parser_peek_token (parser
)->type
)
5087 expr
.value
= c_parser_peek_token (parser
)->value
;
5088 expr
.original_code
= ERROR_MARK
;
5089 loc
= c_parser_peek_token (parser
)->location
;
5090 c_parser_consume_token (parser
);
5091 if (TREE_CODE (expr
.value
) == FIXED_CST
5092 && !targetm
.fixed_point_supported_p ())
5094 error_at (loc
, "fixed-point types not supported for this target");
5095 expr
.value
= error_mark_node
;
5102 expr
.value
= c_parser_peek_token (parser
)->value
;
5103 expr
.original_code
= ERROR_MARK
;
5104 c_parser_consume_token (parser
);
5110 expr
.value
= c_parser_peek_token (parser
)->value
;
5111 expr
.original_code
= STRING_CST
;
5112 c_parser_consume_token (parser
);
5114 case CPP_OBJC_STRING
:
5115 gcc_assert (c_dialect_objc ());
5117 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5118 expr
.original_code
= ERROR_MARK
;
5119 c_parser_consume_token (parser
);
5122 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5124 c_parser_error (parser
, "expected expression");
5125 expr
.value
= error_mark_node
;
5126 expr
.original_code
= ERROR_MARK
;
5130 tree id
= c_parser_peek_token (parser
)->value
;
5131 location_t loc
= c_parser_peek_token (parser
)->location
;
5132 c_parser_consume_token (parser
);
5133 expr
.value
= build_external_ref (id
,
5134 (c_parser_peek_token (parser
)->type
5135 == CPP_OPEN_PAREN
), loc
);
5136 expr
.original_code
= ERROR_MARK
;
5139 case CPP_OPEN_PAREN
:
5140 /* A parenthesized expression, statement expression or compound
5142 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5144 /* A statement expression. */
5146 location_t here
= c_parser_peek_token (parser
)->location
;
5147 c_parser_consume_token (parser
);
5148 c_parser_consume_token (parser
);
5149 if (cur_stmt_list
== NULL
)
5151 error_at (here
, "braced-group within expression allowed "
5152 "only inside a function");
5153 parser
->error
= true;
5154 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5155 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5156 expr
.value
= error_mark_node
;
5157 expr
.original_code
= ERROR_MARK
;
5160 stmt
= c_begin_stmt_expr ();
5161 c_parser_compound_statement_nostart (parser
);
5162 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5164 pedwarn (here
, OPT_pedantic
,
5165 "ISO C forbids braced-groups within expressions");
5166 expr
.value
= c_finish_stmt_expr (stmt
);
5167 expr
.original_code
= ERROR_MARK
;
5169 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5171 /* A compound literal. ??? Can we actually get here rather
5172 than going directly to
5173 c_parser_postfix_expression_after_paren_type from
5175 struct c_type_name
*type_name
;
5176 c_parser_consume_token (parser
);
5177 type_name
= c_parser_type_name (parser
);
5178 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5180 if (type_name
== NULL
)
5182 expr
.value
= error_mark_node
;
5183 expr
.original_code
= ERROR_MARK
;
5186 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5191 /* A parenthesized expression. */
5192 c_parser_consume_token (parser
);
5193 expr
= c_parser_expression (parser
);
5194 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5195 TREE_NO_WARNING (expr
.value
) = 1;
5196 expr
.original_code
= ERROR_MARK
;
5197 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5202 switch (c_parser_peek_token (parser
)->keyword
)
5204 case RID_FUNCTION_NAME
:
5205 case RID_PRETTY_FUNCTION_NAME
:
5206 case RID_C99_FUNCTION_NAME
:
5207 expr
.value
= fname_decl (c_parser_peek_token (parser
)->location
,
5208 c_parser_peek_token (parser
)->keyword
,
5209 c_parser_peek_token (parser
)->value
);
5210 expr
.original_code
= ERROR_MARK
;
5211 c_parser_consume_token (parser
);
5214 c_parser_consume_token (parser
);
5215 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5217 expr
.value
= error_mark_node
;
5218 expr
.original_code
= ERROR_MARK
;
5221 e1
= c_parser_expr_no_commas (parser
, NULL
);
5222 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5224 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5225 expr
.value
= error_mark_node
;
5226 expr
.original_code
= ERROR_MARK
;
5229 t1
= c_parser_type_name (parser
);
5230 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5234 expr
.value
= error_mark_node
;
5235 expr
.original_code
= ERROR_MARK
;
5239 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5240 expr
.original_code
= ERROR_MARK
;
5244 c_parser_consume_token (parser
);
5245 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5247 expr
.value
= error_mark_node
;
5248 expr
.original_code
= ERROR_MARK
;
5251 t1
= c_parser_type_name (parser
);
5254 expr
.value
= error_mark_node
;
5255 expr
.original_code
= ERROR_MARK
;
5258 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5260 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5261 expr
.value
= error_mark_node
;
5262 expr
.original_code
= ERROR_MARK
;
5266 tree type
= groktypename (t1
);
5268 if (type
== error_mark_node
)
5269 offsetof_ref
= error_mark_node
;
5271 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5272 /* Parse the second argument to __builtin_offsetof. We
5273 must have one identifier, and beyond that we want to
5274 accept sub structure and sub array references. */
5275 if (c_parser_next_token_is (parser
, CPP_NAME
))
5277 offsetof_ref
= build_component_ref
5278 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5279 c_parser_consume_token (parser
);
5280 while (c_parser_next_token_is (parser
, CPP_DOT
)
5281 || c_parser_next_token_is (parser
,
5283 || c_parser_next_token_is (parser
,
5286 if (c_parser_next_token_is (parser
, CPP_DEREF
))
5288 loc
= c_parser_peek_token (parser
)->location
;
5289 offsetof_ref
= build_array_ref (offsetof_ref
,
5294 else if (c_parser_next_token_is (parser
, CPP_DOT
))
5297 c_parser_consume_token (parser
);
5298 if (c_parser_next_token_is_not (parser
,
5301 c_parser_error (parser
, "expected identifier");
5304 offsetof_ref
= build_component_ref
5306 c_parser_peek_token (parser
)->value
);
5307 c_parser_consume_token (parser
);
5312 loc
= c_parser_peek_token (parser
)->location
;
5313 c_parser_consume_token (parser
);
5314 idx
= c_parser_expression (parser
).value
;
5315 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5317 offsetof_ref
= build_array_ref (offsetof_ref
, idx
, loc
);
5322 c_parser_error (parser
, "expected identifier");
5323 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5325 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5326 expr
.original_code
= ERROR_MARK
;
5329 case RID_CHOOSE_EXPR
:
5330 c_parser_consume_token (parser
);
5331 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5333 expr
.value
= error_mark_node
;
5334 expr
.original_code
= ERROR_MARK
;
5337 loc
= c_parser_peek_token (parser
)->location
;
5338 e1
= c_parser_expr_no_commas (parser
, NULL
);
5339 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5341 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5342 expr
.value
= error_mark_node
;
5343 expr
.original_code
= ERROR_MARK
;
5346 e2
= c_parser_expr_no_commas (parser
, NULL
);
5347 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5349 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5350 expr
.value
= error_mark_node
;
5351 expr
.original_code
= ERROR_MARK
;
5354 e3
= c_parser_expr_no_commas (parser
, NULL
);
5355 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5360 c
= fold (e1
.value
);
5361 if (TREE_CODE (c
) != INTEGER_CST
)
5363 "first argument to %<__builtin_choose_expr%> not"
5365 expr
= integer_zerop (c
) ? e3
: e2
;
5368 case RID_TYPES_COMPATIBLE_P
:
5369 c_parser_consume_token (parser
);
5370 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5372 expr
.value
= error_mark_node
;
5373 expr
.original_code
= ERROR_MARK
;
5376 t1
= c_parser_type_name (parser
);
5379 expr
.value
= error_mark_node
;
5380 expr
.original_code
= ERROR_MARK
;
5383 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5385 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5386 expr
.value
= error_mark_node
;
5387 expr
.original_code
= ERROR_MARK
;
5390 t2
= c_parser_type_name (parser
);
5393 expr
.value
= error_mark_node
;
5394 expr
.original_code
= ERROR_MARK
;
5397 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5402 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5403 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5405 expr
.value
= comptypes (e1
, e2
)
5406 ? build_int_cst (NULL_TREE
, 1)
5407 : build_int_cst (NULL_TREE
, 0);
5408 expr
.original_code
= ERROR_MARK
;
5411 case RID_AT_SELECTOR
:
5412 gcc_assert (c_dialect_objc ());
5413 c_parser_consume_token (parser
);
5414 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5416 expr
.value
= error_mark_node
;
5417 expr
.original_code
= ERROR_MARK
;
5421 tree sel
= c_parser_objc_selector_arg (parser
);
5422 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5424 expr
.value
= objc_build_selector_expr (sel
);
5425 expr
.original_code
= ERROR_MARK
;
5428 case RID_AT_PROTOCOL
:
5429 gcc_assert (c_dialect_objc ());
5430 c_parser_consume_token (parser
);
5431 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5433 expr
.value
= error_mark_node
;
5434 expr
.original_code
= ERROR_MARK
;
5437 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5439 c_parser_error (parser
, "expected identifier");
5440 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5441 expr
.value
= error_mark_node
;
5442 expr
.original_code
= ERROR_MARK
;
5446 tree id
= c_parser_peek_token (parser
)->value
;
5447 c_parser_consume_token (parser
);
5448 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5450 expr
.value
= objc_build_protocol_expr (id
);
5451 expr
.original_code
= ERROR_MARK
;
5455 /* Extension to support C-structures in the archiver. */
5456 gcc_assert (c_dialect_objc ());
5457 c_parser_consume_token (parser
);
5458 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5460 expr
.value
= error_mark_node
;
5461 expr
.original_code
= ERROR_MARK
;
5464 t1
= c_parser_type_name (parser
);
5467 expr
.value
= error_mark_node
;
5468 expr
.original_code
= ERROR_MARK
;
5469 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5472 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5475 tree type
= groktypename (t1
);
5476 expr
.value
= objc_build_encode_expr (type
);
5477 expr
.original_code
= ERROR_MARK
;
5481 c_parser_error (parser
, "expected expression");
5482 expr
.value
= error_mark_node
;
5483 expr
.original_code
= ERROR_MARK
;
5487 case CPP_OPEN_SQUARE
:
5488 if (c_dialect_objc ())
5490 tree receiver
, args
;
5491 c_parser_consume_token (parser
);
5492 receiver
= c_parser_objc_receiver (parser
);
5493 args
= c_parser_objc_message_args (parser
);
5494 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5496 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5498 expr
.original_code
= ERROR_MARK
;
5501 /* Else fall through to report error. */
5503 c_parser_error (parser
, "expected expression");
5504 expr
.value
= error_mark_node
;
5505 expr
.original_code
= ERROR_MARK
;
5508 return c_parser_postfix_expression_after_primary (parser
, expr
);
5511 /* Parse a postfix expression after a parenthesized type name: the
5512 brace-enclosed initializer of a compound literal, possibly followed
5513 by some postfix operators. This is separate because it is not
5514 possible to tell until after the type name whether a cast
5515 expression has a cast or a compound literal, or whether the operand
5516 of sizeof is a parenthesized type name or starts with a compound
5519 static struct c_expr
5520 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5521 struct c_type_name
*type_name
)
5526 location_t start_loc
;
5527 start_init (NULL_TREE
, NULL
, 0);
5528 type
= groktypename (type_name
);
5529 start_loc
= c_parser_peek_token (parser
)->location
;
5530 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5532 error_at (start_loc
, "compound literal has variable size");
5533 type
= error_mark_node
;
5535 init
= c_parser_braced_init (parser
, type
, false);
5537 maybe_warn_string_init (type
, init
);
5540 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
5541 expr
.value
= build_compound_literal (type
, init
.value
);
5542 expr
.original_code
= ERROR_MARK
;
5543 return c_parser_postfix_expression_after_primary (parser
, expr
);
5546 /* Parse a postfix expression after the initial primary or compound
5547 literal; that is, parse a series of postfix operators. */
5549 static struct c_expr
5550 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5553 tree ident
, idx
, exprlist
;
5554 location_t loc
= c_parser_peek_token (parser
)->location
;
5557 switch (c_parser_peek_token (parser
)->type
)
5559 case CPP_OPEN_SQUARE
:
5560 /* Array reference. */
5561 loc
= c_parser_peek_token (parser
)->location
;
5562 c_parser_consume_token (parser
);
5563 idx
= c_parser_expression (parser
).value
;
5564 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5566 expr
.value
= build_array_ref (expr
.value
, idx
, loc
);
5567 expr
.original_code
= ERROR_MARK
;
5569 case CPP_OPEN_PAREN
:
5570 /* Function call. */
5571 c_parser_consume_token (parser
);
5572 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5573 exprlist
= NULL_TREE
;
5575 exprlist
= c_parser_expr_list (parser
, true);
5576 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5578 expr
.value
= build_function_call (expr
.value
, exprlist
);
5579 expr
.original_code
= ERROR_MARK
;
5580 if (warn_disallowed_functions
)
5581 warn_if_disallowed_function_p (expr
.value
);
5584 /* Structure element reference. */
5585 c_parser_consume_token (parser
);
5586 expr
= default_function_array_conversion (expr
);
5587 if (c_parser_next_token_is (parser
, CPP_NAME
))
5588 ident
= c_parser_peek_token (parser
)->value
;
5591 c_parser_error (parser
, "expected identifier");
5592 expr
.value
= error_mark_node
;
5593 expr
.original_code
= ERROR_MARK
;
5596 c_parser_consume_token (parser
);
5597 expr
.value
= build_component_ref (expr
.value
, ident
);
5598 expr
.original_code
= ERROR_MARK
;
5601 /* Structure element reference. */
5602 c_parser_consume_token (parser
);
5603 expr
= default_function_array_conversion (expr
);
5604 if (c_parser_next_token_is (parser
, CPP_NAME
))
5605 ident
= c_parser_peek_token (parser
)->value
;
5608 c_parser_error (parser
, "expected identifier");
5609 expr
.value
= error_mark_node
;
5610 expr
.original_code
= ERROR_MARK
;
5613 c_parser_consume_token (parser
);
5614 expr
.value
= build_component_ref (build_indirect_ref (loc
,
5618 expr
.original_code
= ERROR_MARK
;
5621 /* Postincrement. */
5622 c_parser_consume_token (parser
);
5623 expr
= default_function_array_conversion (expr
);
5624 expr
.value
= build_unary_op (loc
,
5625 POSTINCREMENT_EXPR
, expr
.value
, 0);
5626 expr
.original_code
= ERROR_MARK
;
5628 case CPP_MINUS_MINUS
:
5629 /* Postdecrement. */
5630 c_parser_consume_token (parser
);
5631 expr
= default_function_array_conversion (expr
);
5632 expr
.value
= build_unary_op (loc
,
5633 POSTDECREMENT_EXPR
, expr
.value
, 0);
5634 expr
.original_code
= ERROR_MARK
;
5642 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5645 assignment-expression
5646 expression , assignment-expression
5649 static struct c_expr
5650 c_parser_expression (c_parser
*parser
)
5653 expr
= c_parser_expr_no_commas (parser
, NULL
);
5654 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5657 c_parser_consume_token (parser
);
5658 next
= c_parser_expr_no_commas (parser
, NULL
);
5659 next
= default_function_array_conversion (next
);
5660 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5661 expr
.original_code
= COMPOUND_EXPR
;
5666 /* Parse an expression and convert functions or arrays to
5669 static struct c_expr
5670 c_parser_expression_conv (c_parser
*parser
)
5673 expr
= c_parser_expression (parser
);
5674 expr
= default_function_array_conversion (expr
);
5678 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5679 functions and arrays to pointers.
5682 assignment-expression
5683 nonempty-expr-list , assignment-expression
5687 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5691 expr
= c_parser_expr_no_commas (parser
, NULL
);
5693 expr
= default_function_array_conversion (expr
);
5694 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5695 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5697 c_parser_consume_token (parser
);
5698 expr
= c_parser_expr_no_commas (parser
, NULL
);
5700 expr
= default_function_array_conversion (expr
);
5701 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5707 /* Parse Objective-C-specific constructs. */
5709 /* Parse an objc-class-definition.
5711 objc-class-definition:
5712 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5713 objc-class-instance-variables[opt] objc-methodprotolist @end
5714 @implementation identifier objc-superclass[opt]
5715 objc-class-instance-variables[opt]
5716 @interface identifier ( identifier ) objc-protocol-refs[opt]
5717 objc-methodprotolist @end
5718 @implementation identifier ( identifier )
5723 "@interface identifier (" must start "@interface identifier (
5724 identifier ) ...": objc-methodprotolist in the first production may
5725 not start with a parenthesized identifier as a declarator of a data
5726 definition with no declaration specifiers if the objc-superclass,
5727 objc-protocol-refs and objc-class-instance-variables are omitted. */
5730 c_parser_objc_class_definition (c_parser
*parser
)
5735 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5737 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5741 c_parser_consume_token (parser
);
5742 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5744 c_parser_error (parser
, "expected identifier");
5747 id1
= c_parser_peek_token (parser
)->value
;
5748 c_parser_consume_token (parser
);
5749 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5752 tree proto
= NULL_TREE
;
5753 c_parser_consume_token (parser
);
5754 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5756 c_parser_error (parser
, "expected identifier");
5757 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5760 id2
= c_parser_peek_token (parser
)->value
;
5761 c_parser_consume_token (parser
);
5762 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5765 objc_start_category_implementation (id1
, id2
);
5768 if (c_parser_next_token_is (parser
, CPP_LESS
))
5769 proto
= c_parser_objc_protocol_refs (parser
);
5770 objc_start_category_interface (id1
, id2
, proto
);
5771 c_parser_objc_methodprotolist (parser
);
5772 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5773 objc_finish_interface ();
5776 if (c_parser_next_token_is (parser
, CPP_COLON
))
5778 c_parser_consume_token (parser
);
5779 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5781 c_parser_error (parser
, "expected identifier");
5784 superclass
= c_parser_peek_token (parser
)->value
;
5785 c_parser_consume_token (parser
);
5788 superclass
= NULL_TREE
;
5791 tree proto
= NULL_TREE
;
5792 if (c_parser_next_token_is (parser
, CPP_LESS
))
5793 proto
= c_parser_objc_protocol_refs (parser
);
5794 objc_start_class_interface (id1
, superclass
, proto
);
5797 objc_start_class_implementation (id1
, superclass
);
5798 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5799 c_parser_objc_class_instance_variables (parser
);
5802 objc_continue_interface ();
5803 c_parser_objc_methodprotolist (parser
);
5804 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5805 objc_finish_interface ();
5809 objc_continue_implementation ();
5814 /* Parse objc-class-instance-variables.
5816 objc-class-instance-variables:
5817 { objc-instance-variable-decl-list[opt] }
5819 objc-instance-variable-decl-list:
5820 objc-visibility-spec
5821 objc-instance-variable-decl ;
5823 objc-instance-variable-decl-list objc-visibility-spec
5824 objc-instance-variable-decl-list objc-instance-variable-decl ;
5825 objc-instance-variable-decl-list ;
5827 objc-visibility-spec:
5832 objc-instance-variable-decl:
5837 c_parser_objc_class_instance_variables (c_parser
*parser
)
5839 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5840 c_parser_consume_token (parser
);
5841 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5844 /* Parse any stray semicolon. */
5845 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5847 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
5848 "extra semicolon in struct or union specified");
5849 c_parser_consume_token (parser
);
5852 /* Stop if at the end of the instance variables. */
5853 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5855 c_parser_consume_token (parser
);
5858 /* Parse any objc-visibility-spec. */
5859 if (c_parser_next_token_is_keyword (parser
, RID_PRIVATE
))
5861 c_parser_consume_token (parser
);
5862 objc_set_visibility (2);
5865 else if (c_parser_next_token_is_keyword (parser
, RID_PROTECTED
))
5867 c_parser_consume_token (parser
);
5868 objc_set_visibility (0);
5871 else if (c_parser_next_token_is_keyword (parser
, RID_PUBLIC
))
5873 c_parser_consume_token (parser
);
5874 objc_set_visibility (1);
5877 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5879 c_parser_pragma (parser
, pragma_external
);
5883 /* Parse some comma-separated declarations. */
5884 decls
= c_parser_struct_declaration (parser
);
5886 /* Comma-separated instance variables are chained together in
5887 reverse order; add them one by one. */
5888 tree ivar
= nreverse (decls
);
5889 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5890 objc_add_instance_variable (copy_node (ivar
));
5892 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5896 /* Parse an objc-class-declaration.
5898 objc-class-declaration:
5899 @class identifier-list ;
5903 c_parser_objc_class_declaration (c_parser
*parser
)
5905 tree list
= NULL_TREE
;
5906 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_CLASS
));
5907 c_parser_consume_token (parser
);
5908 /* Any identifiers, including those declared as type names, are OK
5913 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5915 c_parser_error (parser
, "expected identifier");
5918 id
= c_parser_peek_token (parser
)->value
;
5919 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5920 c_parser_consume_token (parser
);
5921 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5922 c_parser_consume_token (parser
);
5926 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5927 objc_declare_class (list
);
5930 /* Parse an objc-alias-declaration.
5932 objc-alias-declaration:
5933 @compatibility_alias identifier identifier ;
5937 c_parser_objc_alias_declaration (c_parser
*parser
)
5940 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5941 c_parser_consume_token (parser
);
5942 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5944 c_parser_error (parser
, "expected identifier");
5945 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5948 id1
= c_parser_peek_token (parser
)->value
;
5949 c_parser_consume_token (parser
);
5950 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5952 c_parser_error (parser
, "expected identifier");
5953 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5956 id2
= c_parser_peek_token (parser
)->value
;
5957 c_parser_consume_token (parser
);
5958 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5959 objc_declare_alias (id1
, id2
);
5962 /* Parse an objc-protocol-definition.
5964 objc-protocol-definition:
5965 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5966 @protocol identifier-list ;
5968 "@protocol identifier ;" should be resolved as "@protocol
5969 identifier-list ;": objc-methodprotolist may not start with a
5970 semicolon in the first alternative if objc-protocol-refs are
5974 c_parser_objc_protocol_definition (c_parser
*parser
)
5976 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5977 c_parser_consume_token (parser
);
5978 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5980 c_parser_error (parser
, "expected identifier");
5983 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5984 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5986 tree list
= NULL_TREE
;
5987 /* Any identifiers, including those declared as type names, are
5992 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5994 c_parser_error (parser
, "expected identifier");
5997 id
= c_parser_peek_token (parser
)->value
;
5998 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5999 c_parser_consume_token (parser
);
6000 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6001 c_parser_consume_token (parser
);
6005 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6006 objc_declare_protocols (list
);
6010 tree id
= c_parser_peek_token (parser
)->value
;
6011 tree proto
= NULL_TREE
;
6012 c_parser_consume_token (parser
);
6013 if (c_parser_next_token_is (parser
, CPP_LESS
))
6014 proto
= c_parser_objc_protocol_refs (parser
);
6015 parser
->objc_pq_context
= true;
6016 objc_start_protocol (id
, proto
);
6017 c_parser_objc_methodprotolist (parser
);
6018 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6019 parser
->objc_pq_context
= false;
6020 objc_finish_interface ();
6024 /* Parse an objc-method-type.
6031 static enum tree_code
6032 c_parser_objc_method_type (c_parser
*parser
)
6034 switch (c_parser_peek_token (parser
)->type
)
6037 c_parser_consume_token (parser
);
6040 c_parser_consume_token (parser
);
6047 /* Parse an objc-method-definition.
6049 objc-method-definition:
6050 objc-method-type objc-method-decl ;[opt] compound-statement
6054 c_parser_objc_method_definition (c_parser
*parser
)
6056 enum tree_code type
= c_parser_objc_method_type (parser
);
6058 objc_set_method_type (type
);
6059 parser
->objc_pq_context
= true;
6060 decl
= c_parser_objc_method_decl (parser
);
6061 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6063 c_parser_consume_token (parser
);
6064 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6065 "extra semicolon in method definition specified");
6067 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6069 c_parser_error (parser
, "expected %<{%>");
6072 parser
->objc_pq_context
= false;
6073 objc_start_method_definition (decl
);
6074 add_stmt (c_parser_compound_statement (parser
));
6075 objc_finish_method_definition (current_function_decl
);
6078 /* Parse an objc-methodprotolist.
6080 objc-methodprotolist:
6082 objc-methodprotolist objc-methodproto
6083 objc-methodprotolist declaration
6084 objc-methodprotolist ;
6086 The declaration is a data definition, which may be missing
6087 declaration specifiers under the same rules and diagnostics as
6088 other data definitions outside functions, and the stray semicolon
6089 is diagnosed the same way as a stray semicolon outside a
6093 c_parser_objc_methodprotolist (c_parser
*parser
)
6097 /* The list is terminated by @end. */
6098 switch (c_parser_peek_token (parser
)->type
)
6101 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6102 "ISO C does not allow extra %<;%> outside of a function");
6103 c_parser_consume_token (parser
);
6107 c_parser_objc_methodproto (parser
);
6110 c_parser_pragma (parser
, pragma_external
);
6115 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6117 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6123 /* Parse an objc-methodproto.
6126 objc-method-type objc-method-decl ;
6130 c_parser_objc_methodproto (c_parser
*parser
)
6132 enum tree_code type
= c_parser_objc_method_type (parser
);
6134 objc_set_method_type (type
);
6135 /* Remember protocol qualifiers in prototypes. */
6136 parser
->objc_pq_context
= true;
6137 decl
= c_parser_objc_method_decl (parser
);
6138 /* Forget protocol qualifiers here. */
6139 parser
->objc_pq_context
= false;
6140 objc_add_method_declaration (decl
);
6141 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6144 /* Parse an objc-method-decl.
6147 ( objc-type-name ) objc-selector
6149 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6150 objc-keyword-selector objc-optparmlist
6152 objc-keyword-selector:
6154 objc-keyword-selector objc-keyword-decl
6157 objc-selector : ( objc-type-name ) identifier
6158 objc-selector : identifier
6159 : ( objc-type-name ) identifier
6163 objc-optparms objc-optellipsis
6167 objc-opt-parms , parameter-declaration
6175 c_parser_objc_method_decl (c_parser
*parser
)
6177 tree type
= NULL_TREE
;
6179 tree parms
= NULL_TREE
;
6180 bool ellipsis
= false;
6182 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6184 c_parser_consume_token (parser
);
6185 type
= c_parser_objc_type_name (parser
);
6186 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6188 sel
= c_parser_objc_selector (parser
);
6189 /* If there is no selector, or a colon follows, we have an
6190 objc-keyword-selector. If there is a selector, and a colon does
6191 not follow, that selector ends the objc-method-decl. */
6192 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6195 tree list
= NULL_TREE
;
6198 tree atype
= NULL_TREE
, id
, keyworddecl
;
6199 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6201 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6203 c_parser_consume_token (parser
);
6204 atype
= c_parser_objc_type_name (parser
);
6205 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6208 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6210 c_parser_error (parser
, "expected identifier");
6211 return error_mark_node
;
6213 id
= c_parser_peek_token (parser
)->value
;
6214 c_parser_consume_token (parser
);
6215 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6216 list
= chainon (list
, keyworddecl
);
6217 tsel
= c_parser_objc_selector (parser
);
6218 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6221 /* Parse the optional parameter list. Optional Objective-C
6222 method parameters follow the C syntax, and may include '...'
6223 to denote a variable number of arguments. */
6224 parms
= make_node (TREE_LIST
);
6225 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6227 struct c_parm
*parm
;
6228 c_parser_consume_token (parser
);
6229 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6232 c_parser_consume_token (parser
);
6235 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6238 parms
= chainon (parms
,
6239 build_tree_list (NULL_TREE
, grokparm (parm
)));
6243 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6246 /* Parse an objc-type-name.
6249 objc-type-qualifiers[opt] type-name
6250 objc-type-qualifiers[opt]
6252 objc-type-qualifiers:
6254 objc-type-qualifiers objc-type-qualifier
6256 objc-type-qualifier: one of
6257 in out inout bycopy byref oneway
6261 c_parser_objc_type_name (c_parser
*parser
)
6263 tree quals
= NULL_TREE
;
6264 struct c_type_name
*type_name
= NULL
;
6265 tree type
= NULL_TREE
;
6268 c_token
*token
= c_parser_peek_token (parser
);
6269 if (token
->type
== CPP_KEYWORD
6270 && (token
->keyword
== RID_IN
6271 || token
->keyword
== RID_OUT
6272 || token
->keyword
== RID_INOUT
6273 || token
->keyword
== RID_BYCOPY
6274 || token
->keyword
== RID_BYREF
6275 || token
->keyword
== RID_ONEWAY
))
6277 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6278 c_parser_consume_token (parser
);
6283 if (c_parser_next_token_starts_typename (parser
))
6284 type_name
= c_parser_type_name (parser
);
6286 type
= groktypename (type_name
);
6287 return build_tree_list (quals
, type
);
6290 /* Parse objc-protocol-refs.
6297 c_parser_objc_protocol_refs (c_parser
*parser
)
6299 tree list
= NULL_TREE
;
6300 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6301 c_parser_consume_token (parser
);
6302 /* Any identifiers, including those declared as type names, are OK
6307 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6309 c_parser_error (parser
, "expected identifier");
6312 id
= c_parser_peek_token (parser
)->value
;
6313 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6314 c_parser_consume_token (parser
);
6315 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6316 c_parser_consume_token (parser
);
6320 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6324 /* Parse an objc-try-catch-statement.
6326 objc-try-catch-statement:
6327 @try compound-statement objc-catch-list[opt]
6328 @try compound-statement objc-catch-list[opt] @finally compound-statement
6331 @catch ( parameter-declaration ) compound-statement
6332 objc-catch-list @catch ( parameter-declaration ) compound-statement
6336 c_parser_objc_try_catch_statement (c_parser
*parser
)
6340 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TRY
));
6341 c_parser_consume_token (parser
);
6342 loc
= c_parser_peek_token (parser
)->location
;
6343 stmt
= c_parser_compound_statement (parser
);
6344 objc_begin_try_stmt (loc
, stmt
);
6345 while (c_parser_next_token_is_keyword (parser
, RID_CATCH
))
6347 struct c_parm
*parm
;
6348 c_parser_consume_token (parser
);
6349 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6351 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6354 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6357 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6358 objc_begin_catch_clause (grokparm (parm
));
6359 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6360 c_parser_compound_statement_nostart (parser
);
6361 objc_finish_catch_clause ();
6363 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6367 c_parser_consume_token (parser
);
6368 finloc
= c_parser_peek_token (parser
)->location
;
6369 finstmt
= c_parser_compound_statement (parser
);
6370 objc_build_finally_clause (finloc
, finstmt
);
6372 objc_finish_try_stmt ();
6375 /* Parse an objc-synchronized-statement.
6377 objc-synchronized-statement:
6378 @synchronized ( expression ) compound-statement
6382 c_parser_objc_synchronized_statement (c_parser
*parser
)
6386 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6387 c_parser_consume_token (parser
);
6388 loc
= c_parser_peek_token (parser
)->location
;
6389 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6391 expr
= c_parser_expression (parser
).value
;
6392 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6395 expr
= error_mark_node
;
6396 stmt
= c_parser_compound_statement (parser
);
6397 objc_build_synchronized (loc
, expr
, stmt
);
6400 /* Parse an objc-selector; return NULL_TREE without an error if the
6401 next token is not an objc-selector.
6406 enum struct union if else while do for switch case default
6407 break continue return goto asm sizeof typeof __alignof
6408 unsigned long const short volatile signed restrict _Complex
6409 in out inout bycopy byref oneway int char float double void _Bool
6411 ??? Why this selection of keywords but not, for example, storage
6412 class specifiers? */
6415 c_parser_objc_selector (c_parser
*parser
)
6417 c_token
*token
= c_parser_peek_token (parser
);
6418 tree value
= token
->value
;
6419 if (token
->type
== CPP_NAME
)
6421 c_parser_consume_token (parser
);
6424 if (token
->type
!= CPP_KEYWORD
)
6426 switch (token
->keyword
)
6467 c_parser_consume_token (parser
);
6474 /* Parse an objc-selector-arg.
6478 objc-keywordname-list
6480 objc-keywordname-list:
6482 objc-keywordname-list objc-keywordname
6490 c_parser_objc_selector_arg (c_parser
*parser
)
6492 tree sel
= c_parser_objc_selector (parser
);
6493 tree list
= NULL_TREE
;
6494 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6498 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6500 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6501 sel
= c_parser_objc_selector (parser
);
6502 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6508 /* Parse an objc-receiver.
6517 c_parser_objc_receiver (c_parser
*parser
)
6519 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6520 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6521 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6523 tree id
= c_parser_peek_token (parser
)->value
;
6524 c_parser_consume_token (parser
);
6525 return objc_get_class_reference (id
);
6527 return c_parser_expression (parser
).value
;
6530 /* Parse objc-message-args.
6534 objc-keywordarg-list
6536 objc-keywordarg-list:
6538 objc-keywordarg-list objc-keywordarg
6541 objc-selector : objc-keywordexpr
6546 c_parser_objc_message_args (c_parser
*parser
)
6548 tree sel
= c_parser_objc_selector (parser
);
6549 tree list
= NULL_TREE
;
6550 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6555 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6557 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6558 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6559 sel
= c_parser_objc_selector (parser
);
6560 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6566 /* Parse an objc-keywordexpr.
6573 c_parser_objc_keywordexpr (c_parser
*parser
)
6575 tree list
= c_parser_expr_list (parser
, true);
6576 if (TREE_CHAIN (list
) == NULL_TREE
)
6578 /* Just return the expression, remove a level of
6580 return TREE_VALUE (list
);
6584 /* We have a comma expression, we will collapse later. */
6590 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6591 should be considered, statements. ALLOW_STMT is true if we're within
6592 the context of a function and such pragmas are to be allowed. Returns
6593 true if we actually parsed such a pragma. */
6596 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6600 id
= c_parser_peek_token (parser
)->pragma_kind
;
6601 gcc_assert (id
!= PRAGMA_NONE
);
6605 case PRAGMA_OMP_BARRIER
:
6606 if (context
!= pragma_compound
)
6608 if (context
== pragma_stmt
)
6609 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6610 "used in compound statements");
6613 c_parser_omp_barrier (parser
);
6616 case PRAGMA_OMP_FLUSH
:
6617 if (context
!= pragma_compound
)
6619 if (context
== pragma_stmt
)
6620 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6621 "used in compound statements");
6624 c_parser_omp_flush (parser
);
6627 case PRAGMA_OMP_TASKWAIT
:
6628 if (context
!= pragma_compound
)
6630 if (context
== pragma_stmt
)
6631 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
6632 "used in compound statements");
6635 c_parser_omp_taskwait (parser
);
6638 case PRAGMA_OMP_THREADPRIVATE
:
6639 c_parser_omp_threadprivate (parser
);
6642 case PRAGMA_OMP_SECTION
:
6643 error_at (c_parser_peek_token (parser
)->location
,
6644 "%<#pragma omp section%> may only be used in "
6645 "%<#pragma omp sections%> construct");
6646 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6649 case PRAGMA_GCC_PCH_PREPROCESS
:
6650 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6651 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6655 if (id
< PRAGMA_FIRST_EXTERNAL
)
6657 if (context
== pragma_external
)
6660 c_parser_error (parser
, "expected declaration specifiers");
6661 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6664 c_parser_omp_construct (parser
);
6670 c_parser_consume_pragma (parser
);
6671 c_invoke_pragma_handler (id
);
6673 /* Skip to EOL, but suppress any error message. Those will have been
6674 generated by the handler routine through calling error, as opposed
6675 to calling c_parser_error. */
6676 parser
->error
= true;
6677 c_parser_skip_to_pragma_eol (parser
);
6682 /* The interface the pragma parsers have to the lexer. */
6685 pragma_lex (tree
*value
)
6687 c_token
*tok
= c_parser_peek_token (the_parser
);
6688 enum cpp_ttype ret
= tok
->type
;
6690 *value
= tok
->value
;
6691 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6695 if (ret
== CPP_KEYWORD
)
6697 c_parser_consume_token (the_parser
);
6704 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6708 c_parser_consume_pragma (parser
);
6709 if (c_parser_next_token_is (parser
, CPP_STRING
))
6711 name
= c_parser_peek_token (parser
)->value
;
6712 c_parser_consume_token (parser
);
6715 c_parser_error (parser
, "expected string literal");
6716 c_parser_skip_to_pragma_eol (parser
);
6719 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6722 /* OpenMP 2.5 parsing routines. */
6724 /* Returns name of the next clause.
6725 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6726 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6727 returned and the token is consumed. */
6729 static pragma_omp_clause
6730 c_parser_omp_clause_name (c_parser
*parser
)
6732 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6734 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6735 result
= PRAGMA_OMP_CLAUSE_IF
;
6736 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6737 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6738 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6740 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6745 if (!strcmp ("collapse", p
))
6746 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
6747 else if (!strcmp ("copyin", p
))
6748 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6749 else if (!strcmp ("copyprivate", p
))
6750 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6753 if (!strcmp ("firstprivate", p
))
6754 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6757 if (!strcmp ("lastprivate", p
))
6758 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6761 if (!strcmp ("nowait", p
))
6762 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6763 else if (!strcmp ("num_threads", p
))
6764 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6767 if (!strcmp ("ordered", p
))
6768 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6771 if (!strcmp ("private", p
))
6772 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6775 if (!strcmp ("reduction", p
))
6776 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6779 if (!strcmp ("schedule", p
))
6780 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6781 else if (!strcmp ("shared", p
))
6782 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6785 if (!strcmp ("untied", p
))
6786 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
6791 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6792 c_parser_consume_token (parser
);
6797 /* Validate that a clause of the given type does not already exist. */
6800 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
6805 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6806 if (OMP_CLAUSE_CODE (c
) == code
)
6808 error ("too many %qs clauses", name
);
6816 variable-list , identifier
6818 If KIND is nonzero, create the appropriate node and install the decl
6819 in OMP_CLAUSE_DECL and add the node to the head of the list.
6821 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6822 return the list created. */
6825 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6828 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6829 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6830 c_parser_error (parser
, "expected identifier");
6832 while (c_parser_next_token_is (parser
, CPP_NAME
)
6833 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6835 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6838 undeclared_variable (c_parser_peek_token (parser
)->value
,
6839 c_parser_peek_token (parser
)->location
);
6840 else if (t
== error_mark_node
)
6844 tree u
= build_omp_clause (kind
);
6845 OMP_CLAUSE_DECL (u
) = t
;
6846 OMP_CLAUSE_CHAIN (u
) = list
;
6850 list
= tree_cons (t
, NULL_TREE
, list
);
6852 c_parser_consume_token (parser
);
6854 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6857 c_parser_consume_token (parser
);
6863 /* Similarly, but expect leading and trailing parenthesis. This is a very
6864 common case for omp clauses. */
6867 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
6870 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6872 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6873 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6879 collapse ( constant-expression ) */
6882 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
6884 tree c
, num
= error_mark_node
;
6888 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
6890 loc
= c_parser_peek_token (parser
)->location
;
6891 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6893 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
6894 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6896 if (num
== error_mark_node
)
6898 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
6899 || !host_integerp (num
, 0)
6900 || (n
= tree_low_cst (num
, 0)) <= 0
6904 "collapse argument needs positive constant integer expression");
6907 c
= build_omp_clause (OMP_CLAUSE_COLLAPSE
);
6908 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
6909 OMP_CLAUSE_CHAIN (c
) = list
;
6914 copyin ( variable-list ) */
6917 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6919 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6923 copyprivate ( variable-list ) */
6926 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6928 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6932 default ( shared | none ) */
6935 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6937 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6940 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6942 if (c_parser_next_token_is (parser
, CPP_NAME
))
6944 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6949 if (strcmp ("none", p
) != 0)
6951 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6955 if (strcmp ("shared", p
) != 0)
6957 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6964 c_parser_consume_token (parser
);
6969 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6971 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6973 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6976 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6977 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6978 OMP_CLAUSE_CHAIN (c
) = list
;
6979 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6985 firstprivate ( variable-list ) */
6988 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6990 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6994 if ( expression ) */
6997 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
6999 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7001 tree t
= c_parser_paren_condition (parser
);
7004 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
7006 c
= build_omp_clause (OMP_CLAUSE_IF
);
7007 OMP_CLAUSE_IF_EXPR (c
) = t
;
7008 OMP_CLAUSE_CHAIN (c
) = list
;
7012 c_parser_error (parser
, "expected %<(%>");
7018 lastprivate ( variable-list ) */
7021 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
7023 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
7030 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7034 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
7036 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
7037 OMP_CLAUSE_CHAIN (c
) = list
;
7042 num_threads ( expression ) */
7045 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
7047 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7049 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
7050 tree c
, t
= c_parser_expression (parser
).value
;
7052 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7054 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
7056 c_parser_error (parser
, "expected integer expression");
7060 /* Attempt to statically determine when the number isn't positive. */
7061 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
7062 build_int_cst (TREE_TYPE (t
), 0));
7063 if (c
== boolean_true_node
)
7065 warning_at (expr_loc
, 0,
7066 "%<num_threads%> value must be positive");
7067 t
= integer_one_node
;
7070 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
7072 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
7073 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
7074 OMP_CLAUSE_CHAIN (c
) = list
;
7085 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7089 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
7091 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
7092 OMP_CLAUSE_CHAIN (c
) = list
;
7097 private ( variable-list ) */
7100 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
7102 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
7106 reduction ( reduction-operator : variable-list )
7109 One of: + * - & ^ | && || */
7112 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
7114 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7116 enum tree_code code
;
7118 switch (c_parser_peek_token (parser
)->type
)
7130 code
= BIT_AND_EXPR
;
7133 code
= BIT_XOR_EXPR
;
7136 code
= BIT_IOR_EXPR
;
7139 code
= TRUTH_ANDIF_EXPR
;
7142 code
= TRUTH_ORIF_EXPR
;
7145 c_parser_error (parser
,
7146 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7147 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7148 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7151 c_parser_consume_token (parser
);
7152 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7156 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7157 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7158 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7162 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7168 schedule ( schedule-kind )
7169 schedule ( schedule-kind , expression )
7172 static | dynamic | guided | runtime | auto
7176 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7180 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7183 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7185 if (c_parser_next_token_is (parser
, CPP_NAME
))
7187 tree kind
= c_parser_peek_token (parser
)->value
;
7188 const char *p
= IDENTIFIER_POINTER (kind
);
7193 if (strcmp ("dynamic", p
) != 0)
7195 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7199 if (strcmp ("guided", p
) != 0)
7201 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7205 if (strcmp ("runtime", p
) != 0)
7207 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7214 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7215 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7216 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
7217 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
7221 c_parser_consume_token (parser
);
7222 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7225 c_parser_consume_token (parser
);
7227 here
= c_parser_peek_token (parser
)->location
;
7228 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7230 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7231 error_at (here
, "schedule %<runtime%> does not take "
7232 "a %<chunk_size%> parameter");
7233 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
7235 "schedule %<auto%> does not take "
7236 "a %<chunk_size%> parameter");
7237 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7238 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7240 c_parser_error (parser
, "expected integer expression");
7242 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7245 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7246 "expected %<,%> or %<)%>");
7248 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7249 OMP_CLAUSE_CHAIN (c
) = list
;
7253 c_parser_error (parser
, "invalid schedule kind");
7254 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7259 shared ( variable-list ) */
7262 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7264 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7271 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7275 /* FIXME: Should we allow duplicates? */
7276 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
7278 c
= build_omp_clause (OMP_CLAUSE_UNTIED
);
7279 OMP_CLAUSE_CHAIN (c
) = list
;
7283 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7284 is a bitmask in MASK. Return the list of clauses found; the result
7285 of clause default goes in *pdefault. */
7288 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7291 tree clauses
= NULL
;
7294 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7297 pragma_omp_clause c_kind
;
7299 tree prev
= clauses
;
7301 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
7302 c_parser_consume_token (parser
);
7305 here
= c_parser_peek_token (parser
)->location
;
7306 c_kind
= c_parser_omp_clause_name (parser
);
7310 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
7311 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
7312 c_name
= "collapse";
7314 case PRAGMA_OMP_CLAUSE_COPYIN
:
7315 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7318 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7319 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7320 c_name
= "copyprivate";
7322 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7323 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7326 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7327 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7328 c_name
= "firstprivate";
7330 case PRAGMA_OMP_CLAUSE_IF
:
7331 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7334 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7335 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7336 c_name
= "lastprivate";
7338 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7339 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7342 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7343 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7344 c_name
= "num_threads";
7346 case PRAGMA_OMP_CLAUSE_ORDERED
:
7347 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7350 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7351 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7354 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7355 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7356 c_name
= "reduction";
7358 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7359 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7360 c_name
= "schedule";
7362 case PRAGMA_OMP_CLAUSE_SHARED
:
7363 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7366 case PRAGMA_OMP_CLAUSE_UNTIED
:
7367 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
7371 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7375 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7377 /* Remove the invalid clause(s) from the list to avoid
7378 confusing the rest of the compiler. */
7380 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
7385 c_parser_skip_to_pragma_eol (parser
);
7387 return c_finish_omp_clauses (clauses
);
7394 In practice, we're also interested in adding the statement to an
7395 outer node. So it is convenient if we work around the fact that
7396 c_parser_statement calls add_stmt. */
7399 c_parser_omp_structured_block (c_parser
*parser
)
7401 tree stmt
= push_stmt_list ();
7402 c_parser_statement (parser
);
7403 return pop_stmt_list (stmt
);
7407 # pragma omp atomic new-line
7411 x binop= expr | x++ | ++x | x-- | --x
7413 +, *, -, /, &, ^, |, <<, >>
7415 where x is an lvalue expression with scalar type. */
7418 c_parser_omp_atomic (c_parser
*parser
)
7422 enum tree_code code
;
7423 struct c_expr rhs_expr
;
7425 c_parser_skip_to_pragma_eol (parser
);
7427 lhs
= c_parser_unary_expression (parser
).value
;
7428 switch (TREE_CODE (lhs
))
7432 c_parser_skip_to_end_of_block_or_statement (parser
);
7435 case PREINCREMENT_EXPR
:
7436 case POSTINCREMENT_EXPR
:
7437 lhs
= TREE_OPERAND (lhs
, 0);
7439 rhs
= integer_one_node
;
7442 case PREDECREMENT_EXPR
:
7443 case POSTDECREMENT_EXPR
:
7444 lhs
= TREE_OPERAND (lhs
, 0);
7446 rhs
= integer_one_node
;
7450 switch (c_parser_peek_token (parser
)->type
)
7456 code
= TRUNC_DIV_EXPR
;
7471 code
= BIT_AND_EXPR
;
7474 code
= BIT_IOR_EXPR
;
7477 code
= BIT_XOR_EXPR
;
7480 c_parser_error (parser
,
7481 "invalid operator for %<#pragma omp atomic%>");
7485 c_parser_consume_token (parser
);
7486 rhs_expr
= c_parser_expression (parser
);
7487 rhs_expr
= default_function_array_conversion (rhs_expr
);
7488 rhs
= rhs_expr
.value
;
7491 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7492 if (stmt
!= error_mark_node
)
7494 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7499 # pragma omp barrier new-line
7503 c_parser_omp_barrier (c_parser
*parser
)
7505 c_parser_consume_pragma (parser
);
7506 c_parser_skip_to_pragma_eol (parser
);
7508 c_finish_omp_barrier ();
7512 # pragma omp critical [(name)] new-line
7517 c_parser_omp_critical (c_parser
*parser
)
7519 tree stmt
, name
= NULL
;
7521 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7523 c_parser_consume_token (parser
);
7524 if (c_parser_next_token_is (parser
, CPP_NAME
))
7526 name
= c_parser_peek_token (parser
)->value
;
7527 c_parser_consume_token (parser
);
7528 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7531 c_parser_error (parser
, "expected identifier");
7533 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7534 c_parser_error (parser
, "expected %<(%> or end of line");
7535 c_parser_skip_to_pragma_eol (parser
);
7537 stmt
= c_parser_omp_structured_block (parser
);
7538 return c_finish_omp_critical (stmt
, name
);
7542 # pragma omp flush flush-vars[opt] new-line
7545 ( variable-list ) */
7548 c_parser_omp_flush (c_parser
*parser
)
7550 c_parser_consume_pragma (parser
);
7551 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7552 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
7553 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7554 c_parser_error (parser
, "expected %<(%> or end of line");
7555 c_parser_skip_to_pragma_eol (parser
);
7557 c_finish_omp_flush ();
7560 /* Parse the restricted form of the for statement allowed by OpenMP.
7561 The real trick here is to determine the loop control variable early
7562 so that we can push a new decl if necessary to make it private. */
7565 c_parser_omp_for_loop (c_parser
*parser
, tree clauses
, tree
*par_clauses
)
7567 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
7568 tree declv
, condv
, incrv
, initv
, for_block
= NULL
, ret
= NULL
;
7570 bool fail
= false, open_brace_parsed
= false;
7571 int i
, collapse
= 1, nbraces
= 0;
7573 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
7574 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
7575 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
7577 gcc_assert (collapse
>= 1);
7579 declv
= make_tree_vec (collapse
);
7580 initv
= make_tree_vec (collapse
);
7581 condv
= make_tree_vec (collapse
);
7582 incrv
= make_tree_vec (collapse
);
7584 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7586 c_parser_error (parser
, "for statement expected");
7589 loc
= c_parser_peek_token (parser
)->location
;
7590 c_parser_consume_token (parser
);
7592 for (i
= 0; i
< collapse
; i
++)
7596 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7599 /* Parse the initialization declaration or expression. */
7600 if (c_parser_next_token_starts_declspecs (parser
))
7604 = tree_cons (NULL
, c_begin_compound_stmt (true), for_block
);
7605 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7606 decl
= check_for_loop_decls ();
7609 if (DECL_INITIAL (decl
) == error_mark_node
)
7610 decl
= error_mark_node
;
7613 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7614 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7616 struct c_expr init_exp
;
7617 location_t init_loc
;
7619 decl
= c_parser_postfix_expression (parser
).value
;
7621 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7622 init_loc
= c_parser_peek_token (parser
)->location
;
7624 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
7625 init_exp
= default_function_array_conversion (init_exp
);
7626 init
= build_modify_expr (init_loc
,
7627 decl
, NOP_EXPR
, init_exp
.value
);
7628 init
= c_process_expr_stmt (init
);
7630 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7635 c_parser_error (parser
,
7636 "expected iteration declaration or initialization");
7637 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7643 /* Parse the loop condition. */
7645 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7647 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
7649 cond
= c_parser_expression_conv (parser
).value
;
7650 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
7651 protected_set_expr_location (cond
, cond_loc
);
7653 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7655 /* Parse the increment expression. */
7657 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7659 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
7661 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7662 protected_set_expr_location (incr
, incr_loc
);
7664 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7666 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
7670 TREE_VEC_ELT (declv
, i
) = decl
;
7671 TREE_VEC_ELT (initv
, i
) = init
;
7672 TREE_VEC_ELT (condv
, i
) = cond
;
7673 TREE_VEC_ELT (incrv
, i
) = incr
;
7677 if (i
== collapse
- 1)
7680 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7681 in between the collapsed for loops to be still considered perfectly
7682 nested. Hopefully the final version clarifies this.
7683 For now handle (multiple) {'s and empty statements. */
7686 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7688 c_parser_consume_token (parser
);
7691 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7693 c_parser_consume_token (parser
);
7697 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7698 c_parser_consume_token (parser
);
7701 c_parser_error (parser
, "not enough perfectly nested loops");
7704 open_brace_parsed
= true;
7714 nbraces
+= bracecount
;
7717 save_break
= c_break_label
;
7718 c_break_label
= size_one_node
;
7719 save_cont
= c_cont_label
;
7720 c_cont_label
= NULL_TREE
;
7721 body
= push_stmt_list ();
7723 if (open_brace_parsed
)
7725 stmt
= c_begin_compound_stmt (true);
7726 c_parser_compound_statement_nostart (parser
);
7727 add_stmt (c_end_compound_stmt (stmt
, true));
7730 add_stmt (c_parser_c99_block_statement (parser
));
7732 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7734 body
= pop_stmt_list (body
);
7735 c_break_label
= save_break
;
7736 c_cont_label
= save_cont
;
7740 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7742 c_parser_consume_token (parser
);
7745 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7746 c_parser_consume_token (parser
);
7749 c_parser_error (parser
, "collapsed loops not perfectly nested");
7752 stmt
= c_begin_compound_stmt (true);
7754 c_parser_compound_statement_nostart (parser
);
7755 body
= c_end_compound_stmt (stmt
, true);
7762 /* Only bother calling c_finish_omp_for if we haven't already generated
7763 an error from the initialization parsing. */
7766 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
7769 if (par_clauses
!= NULL
)
7772 for (c
= par_clauses
; *c
; )
7773 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
7774 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
7775 c
= &OMP_CLAUSE_CHAIN (*c
);
7778 for (i
= 0; i
< collapse
; i
++)
7779 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
7782 c
= &OMP_CLAUSE_CHAIN (*c
);
7783 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
7786 "iteration variable %qD should not be firstprivate",
7787 OMP_CLAUSE_DECL (*c
));
7788 *c
= OMP_CLAUSE_CHAIN (*c
);
7792 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7793 change it to shared (decl) in
7794 OMP_PARALLEL_CLAUSES. */
7795 tree l
= build_omp_clause (OMP_CLAUSE_LASTPRIVATE
);
7796 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
7797 OMP_CLAUSE_CHAIN (l
) = clauses
;
7799 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
7803 OMP_FOR_CLAUSES (stmt
) = clauses
;
7810 stmt
= c_end_compound_stmt (TREE_VALUE (for_block
), true);
7812 for_block
= TREE_CHAIN (for_block
);
7818 #pragma omp for for-clause[optseq] new-line
7822 #define OMP_FOR_CLAUSE_MASK \
7823 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7824 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7825 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7826 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7827 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7828 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7829 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7830 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7833 c_parser_omp_for (c_parser
*parser
)
7835 tree block
, clauses
, ret
;
7837 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7840 block
= c_begin_compound_stmt (true);
7841 ret
= c_parser_omp_for_loop (parser
, clauses
, NULL
);
7842 block
= c_end_compound_stmt (block
, true);
7849 # pragma omp master new-line
7854 c_parser_omp_master (c_parser
*parser
)
7856 c_parser_skip_to_pragma_eol (parser
);
7857 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7861 # pragma omp ordered new-line
7866 c_parser_omp_ordered (c_parser
*parser
)
7868 c_parser_skip_to_pragma_eol (parser
);
7869 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7875 { section-sequence }
7878 section-directive[opt] structured-block
7879 section-sequence section-directive structured-block */
7882 c_parser_omp_sections_scope (c_parser
*parser
)
7885 bool error_suppress
= false;
7888 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7890 /* Avoid skipping until the end of the block. */
7891 parser
->error
= false;
7895 stmt
= push_stmt_list ();
7897 loc
= c_parser_peek_token (parser
)->location
;
7898 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7900 substmt
= push_stmt_list ();
7904 c_parser_statement (parser
);
7906 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7908 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7910 if (c_parser_next_token_is (parser
, CPP_EOF
))
7914 substmt
= pop_stmt_list (substmt
);
7915 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7916 SET_EXPR_LOCATION (substmt
, loc
);
7922 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7924 if (c_parser_next_token_is (parser
, CPP_EOF
))
7927 loc
= c_parser_peek_token (parser
)->location
;
7928 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7930 c_parser_consume_pragma (parser
);
7931 c_parser_skip_to_pragma_eol (parser
);
7932 error_suppress
= false;
7934 else if (!error_suppress
)
7936 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
7937 error_suppress
= true;
7940 substmt
= c_parser_omp_structured_block (parser
);
7941 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7942 SET_EXPR_LOCATION (substmt
, loc
);
7945 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7946 "expected %<#pragma omp section%> or %<}%>");
7948 substmt
= pop_stmt_list (stmt
);
7950 stmt
= make_node (OMP_SECTIONS
);
7951 TREE_TYPE (stmt
) = void_type_node
;
7952 OMP_SECTIONS_BODY (stmt
) = substmt
;
7954 return add_stmt (stmt
);
7958 # pragma omp sections sections-clause[optseq] newline
7962 #define OMP_SECTIONS_CLAUSE_MASK \
7963 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7964 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7965 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7966 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7967 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7970 c_parser_omp_sections (c_parser
*parser
)
7972 tree block
, clauses
, ret
;
7974 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7975 "#pragma omp sections");
7977 block
= c_begin_compound_stmt (true);
7978 ret
= c_parser_omp_sections_scope (parser
);
7980 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7981 block
= c_end_compound_stmt (block
, true);
7988 # pragma parallel parallel-clause new-line
7989 # pragma parallel for parallel-for-clause new-line
7990 # pragma parallel sections parallel-sections-clause new-line
7993 #define OMP_PARALLEL_CLAUSE_MASK \
7994 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7995 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7996 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7997 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7998 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7999 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8000 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8001 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8004 c_parser_omp_parallel (c_parser
*parser
)
8006 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
8007 const char *p_name
= "#pragma omp parallel";
8008 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
8009 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
8011 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
8013 c_parser_consume_token (parser
);
8014 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
8015 p_name
= "#pragma omp parallel for";
8016 mask
|= OMP_FOR_CLAUSE_MASK
;
8017 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8019 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8021 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8022 if (strcmp (p
, "sections") == 0)
8024 c_parser_consume_token (parser
);
8025 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
8026 p_name
= "#pragma omp parallel sections";
8027 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
8028 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8032 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
8036 case PRAGMA_OMP_PARALLEL
:
8037 block
= c_begin_omp_parallel ();
8038 c_parser_statement (parser
);
8039 stmt
= c_finish_omp_parallel (clauses
, block
);
8042 case PRAGMA_OMP_PARALLEL_FOR
:
8043 block
= c_begin_omp_parallel ();
8044 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8045 c_parser_omp_for_loop (parser
, ws_clause
, &par_clause
);
8046 stmt
= c_finish_omp_parallel (par_clause
, block
);
8047 OMP_PARALLEL_COMBINED (stmt
) = 1;
8050 case PRAGMA_OMP_PARALLEL_SECTIONS
:
8051 block
= c_begin_omp_parallel ();
8052 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8053 stmt
= c_parser_omp_sections_scope (parser
);
8055 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
8056 stmt
= c_finish_omp_parallel (par_clause
, block
);
8057 OMP_PARALLEL_COMBINED (stmt
) = 1;
8068 # pragma omp single single-clause[optseq] new-line
8072 #define OMP_SINGLE_CLAUSE_MASK \
8073 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8074 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8075 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8076 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8079 c_parser_omp_single (c_parser
*parser
)
8081 tree stmt
= make_node (OMP_SINGLE
);
8082 TREE_TYPE (stmt
) = void_type_node
;
8084 OMP_SINGLE_CLAUSES (stmt
)
8085 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
8086 "#pragma omp single");
8087 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
8089 return add_stmt (stmt
);
8093 # pragma omp task task-clause[optseq] new-line
8096 #define OMP_TASK_CLAUSE_MASK \
8097 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8098 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8099 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8100 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8101 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8102 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8105 c_parser_omp_task (c_parser
*parser
)
8107 tree clauses
, block
;
8109 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
8110 "#pragma omp task");
8112 block
= c_begin_omp_task ();
8113 c_parser_statement (parser
);
8114 return c_finish_omp_task (clauses
, block
);
8118 # pragma omp taskwait new-line
8122 c_parser_omp_taskwait (c_parser
*parser
)
8124 c_parser_consume_pragma (parser
);
8125 c_parser_skip_to_pragma_eol (parser
);
8127 c_finish_omp_taskwait ();
8130 /* Main entry point to parsing most OpenMP pragmas. */
8133 c_parser_omp_construct (c_parser
*parser
)
8135 enum pragma_kind p_kind
;
8139 loc
= c_parser_peek_token (parser
)->location
;
8140 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
8141 c_parser_consume_pragma (parser
);
8143 /* For all constructs below except #pragma omp atomic
8144 MUST_NOT_THROW catch handlers are needed when exceptions
8146 if (p_kind
!= PRAGMA_OMP_ATOMIC
)
8147 c_maybe_initialize_eh ();
8151 case PRAGMA_OMP_ATOMIC
:
8152 c_parser_omp_atomic (parser
);
8154 case PRAGMA_OMP_CRITICAL
:
8155 stmt
= c_parser_omp_critical (parser
);
8157 case PRAGMA_OMP_FOR
:
8158 stmt
= c_parser_omp_for (parser
);
8160 case PRAGMA_OMP_MASTER
:
8161 stmt
= c_parser_omp_master (parser
);
8163 case PRAGMA_OMP_ORDERED
:
8164 stmt
= c_parser_omp_ordered (parser
);
8166 case PRAGMA_OMP_PARALLEL
:
8167 stmt
= c_parser_omp_parallel (parser
);
8169 case PRAGMA_OMP_SECTIONS
:
8170 stmt
= c_parser_omp_sections (parser
);
8172 case PRAGMA_OMP_SINGLE
:
8173 stmt
= c_parser_omp_single (parser
);
8175 case PRAGMA_OMP_TASK
:
8176 stmt
= c_parser_omp_task (parser
);
8183 SET_EXPR_LOCATION (stmt
, loc
);
8188 # pragma omp threadprivate (variable-list) */
8191 c_parser_omp_threadprivate (c_parser
*parser
)
8195 c_parser_consume_pragma (parser
);
8196 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
8198 /* Mark every variable in VARS to be assigned thread local storage. */
8199 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
8201 tree v
= TREE_PURPOSE (t
);
8203 /* If V had already been marked threadprivate, it doesn't matter
8204 whether it had been used prior to this point. */
8205 if (TREE_CODE (v
) != VAR_DECL
)
8206 error ("%qD is not a variable", v
);
8207 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
8208 error ("%qE declared %<threadprivate%> after first use", v
);
8209 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
8210 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
8211 else if (TREE_TYPE (v
) == error_mark_node
)
8213 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
8214 error ("%<threadprivate%> %qE has incomplete type", v
);
8217 if (! DECL_THREAD_LOCAL_P (v
))
8219 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
8220 /* If rtl has been already set for this var, call
8221 make_decl_rtl once again, so that encode_section_info
8222 has a chance to look at the new decl flags. */
8223 if (DECL_RTL_SET_P (v
))
8226 C_DECL_THREADPRIVATE_P (v
) = 1;
8230 c_parser_skip_to_pragma_eol (parser
);
8234 /* Parse a single source file. */
8239 /* Use local storage to begin. If the first token is a pragma, parse it.
8240 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8241 which will cause garbage collection. */
8244 memset (&tparser
, 0, sizeof tparser
);
8245 the_parser
= &tparser
;
8247 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
8248 c_parser_pragma_pch_preprocess (&tparser
);
8250 the_parser
= GGC_NEW (c_parser
);
8251 *the_parser
= tparser
;
8253 c_parser_translation_unit (the_parser
);
8257 #include "gt-c-parser.h"