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
);
2583 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2585 c_parser_consume_token (parser
);
2586 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2588 c_parser_consume_token (parser
);
2590 return get_parm_info (true);
2593 struct c_arg_info
*ret
2594 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2599 ret
->pending_sizes
= 0;
2600 ret
->had_vla_unspec
= 0;
2606 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2614 /* Parse a parameter declaration. ATTRS are the attributes at the
2615 start of the declaration if it is the first parameter. */
2617 static struct c_parm
*
2618 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2620 struct c_declspecs
*specs
;
2621 struct c_declarator
*declarator
;
2623 tree postfix_attrs
= NULL_TREE
;
2625 if (!c_parser_next_token_starts_declspecs (parser
))
2627 /* ??? In some Objective-C cases '...' isn't applicable so there
2628 should be a different message. */
2629 c_parser_error (parser
,
2630 "expected declaration specifiers or %<...%>");
2631 c_parser_skip_to_end_of_parameter (parser
);
2634 specs
= build_null_declspecs ();
2637 declspecs_add_attrs (specs
, attrs
);
2640 c_parser_declspecs (parser
, specs
, true, true, true);
2641 finish_declspecs (specs
);
2642 pending_xref_error ();
2643 prefix_attrs
= specs
->attrs
;
2644 specs
->attrs
= NULL_TREE
;
2645 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2646 C_DTR_PARM
, &dummy
);
2647 if (declarator
== NULL
)
2649 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2652 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2653 postfix_attrs
= c_parser_attributes (parser
);
2654 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2658 /* Parse a string literal in an asm expression. It should not be
2659 translated, and wide string literals are an error although
2660 permitted by the syntax. This is a GNU extension.
2665 ??? At present, following the old parser, the caller needs to have
2666 set lex_untranslated_string to 1. It would be better to follow the
2667 C++ parser rather than using this kludge. */
2670 c_parser_asm_string_literal (c_parser
*parser
)
2673 if (c_parser_next_token_is (parser
, CPP_STRING
))
2675 str
= c_parser_peek_token (parser
)->value
;
2676 c_parser_consume_token (parser
);
2678 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2680 error_at (c_parser_peek_token (parser
)->location
,
2681 "wide string literal in %<asm%>");
2682 str
= build_string (1, "");
2683 c_parser_consume_token (parser
);
2687 c_parser_error (parser
, "expected string literal");
2693 /* Parse a simple asm expression. This is used in restricted
2694 contexts, where a full expression with inputs and outputs does not
2695 make sense. This is a GNU extension.
2698 asm ( asm-string-literal )
2702 c_parser_simple_asm_expr (c_parser
*parser
)
2705 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2706 /* ??? Follow the C++ parser rather than using the
2707 lex_untranslated_string kludge. */
2708 parser
->lex_untranslated_string
= true;
2709 c_parser_consume_token (parser
);
2710 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2712 parser
->lex_untranslated_string
= false;
2715 str
= c_parser_asm_string_literal (parser
);
2716 parser
->lex_untranslated_string
= false;
2717 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2719 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2725 /* Parse (possibly empty) attributes. This is a GNU extension.
2729 attributes attribute
2732 __attribute__ ( ( attribute-list ) )
2736 attribute_list , attrib
2741 any-word ( identifier )
2742 any-word ( identifier , nonempty-expr-list )
2743 any-word ( expr-list )
2745 where the "identifier" must not be declared as a type, and
2746 "any-word" may be any identifier (including one declared as a
2747 type), a reserved word storage class specifier, type specifier or
2748 type qualifier. ??? This still leaves out most reserved keywords
2749 (following the old parser), shouldn't we include them, and why not
2750 allow identifiers declared as types to start the arguments? */
2753 c_parser_attributes (c_parser
*parser
)
2755 tree attrs
= NULL_TREE
;
2756 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2758 /* ??? Follow the C++ parser rather than using the
2759 lex_untranslated_string kludge. */
2760 parser
->lex_untranslated_string
= true;
2761 c_parser_consume_token (parser
);
2762 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2764 parser
->lex_untranslated_string
= false;
2767 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2769 parser
->lex_untranslated_string
= false;
2770 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2773 /* Parse the attribute list. */
2774 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2775 || c_parser_next_token_is (parser
, CPP_NAME
)
2776 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2778 tree attr
, attr_name
, attr_args
;
2779 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2781 c_parser_consume_token (parser
);
2784 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2786 /* ??? See comment above about what keywords are
2789 switch (c_parser_peek_token (parser
)->keyword
)
2826 /* Accept __attribute__((__const)) as __attribute__((const))
2829 = ridpointers
[(int) c_parser_peek_token (parser
)->keyword
];
2832 attr_name
= c_parser_peek_token (parser
)->value
;
2833 c_parser_consume_token (parser
);
2834 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2836 attr
= build_tree_list (attr_name
, NULL_TREE
);
2837 attrs
= chainon (attrs
, attr
);
2840 c_parser_consume_token (parser
);
2841 /* Parse the attribute contents. If they start with an
2842 identifier which is followed by a comma or close
2843 parenthesis, then the arguments start with that
2844 identifier; otherwise they are an expression list. */
2845 if (c_parser_next_token_is (parser
, CPP_NAME
)
2846 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2847 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2848 || (c_parser_peek_2nd_token (parser
)->type
2849 == CPP_CLOSE_PAREN
)))
2851 tree arg1
= c_parser_peek_token (parser
)->value
;
2852 c_parser_consume_token (parser
);
2853 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2854 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2857 c_parser_consume_token (parser
);
2858 attr_args
= tree_cons (NULL_TREE
, arg1
,
2859 c_parser_expr_list (parser
, false));
2864 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2865 attr_args
= NULL_TREE
;
2867 attr_args
= c_parser_expr_list (parser
, false);
2869 attr
= build_tree_list (attr_name
, attr_args
);
2870 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2871 c_parser_consume_token (parser
);
2874 parser
->lex_untranslated_string
= false;
2875 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2879 attrs
= chainon (attrs
, attr
);
2881 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2882 c_parser_consume_token (parser
);
2885 parser
->lex_untranslated_string
= false;
2886 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2890 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2891 c_parser_consume_token (parser
);
2894 parser
->lex_untranslated_string
= false;
2895 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2899 parser
->lex_untranslated_string
= false;
2904 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2907 specifier-qualifier-list abstract-declarator[opt]
2910 static struct c_type_name
*
2911 c_parser_type_name (c_parser
*parser
)
2913 struct c_declspecs
*specs
= build_null_declspecs ();
2914 struct c_declarator
*declarator
;
2915 struct c_type_name
*ret
;
2917 c_parser_declspecs (parser
, specs
, false, true, true);
2918 if (!specs
->declspecs_seen_p
)
2920 c_parser_error (parser
, "expected specifier-qualifier-list");
2923 pending_xref_error ();
2924 finish_declspecs (specs
);
2925 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2926 C_DTR_ABSTRACT
, &dummy
);
2927 if (declarator
== NULL
)
2929 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2931 ret
->declarator
= declarator
;
2935 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2938 assignment-expression
2939 { initializer-list }
2940 { initializer-list , }
2943 designation[opt] initializer
2944 initializer-list , designation[opt] initializer
2951 designator-list designator
2958 [ constant-expression ]
2970 [ constant-expression ... constant-expression ]
2972 Any expression without commas is accepted in the syntax for the
2973 constant-expressions, with non-constant expressions rejected later.
2975 This function is only used for top-level initializers; for nested
2976 ones, see c_parser_initval. */
2978 static struct c_expr
2979 c_parser_initializer (c_parser
*parser
)
2981 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
2982 return c_parser_braced_init (parser
, NULL_TREE
, false);
2986 ret
= c_parser_expr_no_commas (parser
, NULL
);
2987 if (TREE_CODE (ret
.value
) != STRING_CST
2988 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
2989 ret
= default_function_array_conversion (ret
);
2994 /* Parse a braced initializer list. TYPE is the type specified for a
2995 compound literal, and NULL_TREE for other initializers and for
2996 nested braced lists. NESTED_P is true for nested braced lists,
2997 false for the list of a compound literal or the list that is the
2998 top-level initializer in a declaration. */
3000 static struct c_expr
3001 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3003 location_t brace_loc
= c_parser_peek_token (parser
)->location
;
3004 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3005 c_parser_consume_token (parser
);
3007 push_init_level (0);
3009 really_start_incremental_init (type
);
3010 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3012 pedwarn (brace_loc
, OPT_pedantic
, "ISO C forbids empty initializer braces");
3016 /* Parse a non-empty initializer list, possibly with a trailing
3020 c_parser_initelt (parser
);
3023 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3024 c_parser_consume_token (parser
);
3027 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3031 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3034 ret
.value
= error_mark_node
;
3035 ret
.original_code
= ERROR_MARK
;
3036 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3039 c_parser_consume_token (parser
);
3040 return pop_init_level (0);
3043 /* Parse a nested initializer, including designators. */
3046 c_parser_initelt (c_parser
*parser
)
3048 /* Parse any designator or designator list. A single array
3049 designator may have the subsequent "=" omitted in GNU C, but a
3050 longer list or a structure member designator may not. */
3051 if (c_parser_next_token_is (parser
, CPP_NAME
)
3052 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3054 /* Old-style structure member designator. */
3055 set_init_label (c_parser_peek_token (parser
)->value
);
3056 /* Use the colon as the error location. */
3057 pedwarn (c_parser_peek_2nd_token (parser
)->location
, OPT_pedantic
,
3058 "obsolete use of designated initializer with %<:%>");
3059 c_parser_consume_token (parser
);
3060 c_parser_consume_token (parser
);
3064 /* des_seen is 0 if there have been no designators, 1 if there
3065 has been a single array designator and 2 otherwise. */
3067 /* Location of a designator. */
3068 location_t des_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3069 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3070 || c_parser_next_token_is (parser
, CPP_DOT
))
3072 int des_prev
= des_seen
;
3074 des_loc
= c_parser_peek_token (parser
)->location
;
3077 if (c_parser_next_token_is (parser
, CPP_DOT
))
3080 c_parser_consume_token (parser
);
3081 if (c_parser_next_token_is (parser
, CPP_NAME
))
3083 set_init_label (c_parser_peek_token (parser
)->value
);
3084 c_parser_consume_token (parser
);
3089 init
.value
= error_mark_node
;
3090 init
.original_code
= ERROR_MARK
;
3091 c_parser_error (parser
, "expected identifier");
3092 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3093 process_init_element (init
, false);
3100 location_t ellipsis_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3101 /* ??? Following the old parser, [ objc-receiver
3102 objc-message-args ] is accepted as an initializer,
3103 being distinguished from a designator by what follows
3104 the first assignment expression inside the square
3105 brackets, but after a first array designator a
3106 subsequent square bracket is for Objective-C taken to
3107 start an expression, using the obsolete form of
3108 designated initializer without '=', rather than
3109 possibly being a second level of designation: in LALR
3110 terms, the '[' is shifted rather than reducing
3111 designator to designator-list. */
3112 if (des_prev
== 1 && c_dialect_objc ())
3114 des_seen
= des_prev
;
3117 if (des_prev
== 0 && c_dialect_objc ())
3119 /* This might be an array designator or an
3120 Objective-C message expression. If the former,
3121 continue parsing here; if the latter, parse the
3122 remainder of the initializer given the starting
3123 primary-expression. ??? It might make sense to
3124 distinguish when des_prev == 1 as well; see
3125 previous comment. */
3127 struct c_expr mexpr
;
3128 c_parser_consume_token (parser
);
3129 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3130 && ((c_parser_peek_token (parser
)->id_kind
3132 || (c_parser_peek_token (parser
)->id_kind
3133 == C_ID_CLASSNAME
)))
3135 /* Type name receiver. */
3136 tree id
= c_parser_peek_token (parser
)->value
;
3137 c_parser_consume_token (parser
);
3138 rec
= objc_get_class_reference (id
);
3139 goto parse_message_args
;
3141 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3142 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3143 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3144 goto array_desig_after_first
;
3145 /* Expression receiver. So far only one part
3146 without commas has been parsed; there might be
3147 more of the expression. */
3149 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3152 c_parser_consume_token (parser
);
3153 next
= c_parser_expr_no_commas (parser
, NULL
);
3154 next
= default_function_array_conversion (next
);
3155 rec
= build_compound_expr (rec
, next
.value
);
3158 /* Now parse the objc-message-args. */
3159 args
= c_parser_objc_message_args (parser
);
3160 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3163 = objc_build_message_expr (build_tree_list (rec
, args
));
3164 mexpr
.original_code
= ERROR_MARK
;
3165 /* Now parse and process the remainder of the
3166 initializer, starting with this message
3167 expression as a primary-expression. */
3168 c_parser_initval (parser
, &mexpr
);
3171 c_parser_consume_token (parser
);
3172 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3173 array_desig_after_first
:
3174 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3176 ellipsis_loc
= c_parser_peek_token (parser
)->location
;
3177 c_parser_consume_token (parser
);
3178 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3182 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3184 c_parser_consume_token (parser
);
3185 set_init_index (first
, second
);
3187 pedwarn (ellipsis_loc
, OPT_pedantic
,
3188 "ISO C forbids specifying range of elements to initialize");
3191 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3197 if (c_parser_next_token_is (parser
, CPP_EQ
))
3200 pedwarn (des_loc
, OPT_pedantic
,
3201 "ISO C90 forbids specifying subobject to initialize");
3202 c_parser_consume_token (parser
);
3207 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
3208 "obsolete use of designated initializer without %<=%>");
3212 init
.value
= error_mark_node
;
3213 init
.original_code
= ERROR_MARK
;
3214 c_parser_error (parser
, "expected %<=%>");
3215 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3216 process_init_element (init
, false);
3222 c_parser_initval (parser
, NULL
);
3225 /* Parse a nested initializer; as c_parser_initializer but parses
3226 initializers within braced lists, after any designators have been
3227 applied. If AFTER is not NULL then it is an Objective-C message
3228 expression which is the primary-expression starting the
3232 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3235 gcc_assert (!after
|| c_dialect_objc ());
3236 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3237 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3240 init
= c_parser_expr_no_commas (parser
, after
);
3241 if (init
.value
!= NULL_TREE
3242 && TREE_CODE (init
.value
) != STRING_CST
3243 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3244 init
= default_function_array_conversion (init
);
3246 process_init_element (init
, false);
3249 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3253 { block-item-list[opt] }
3254 { label-declarations block-item-list }
3258 block-item-list block-item
3270 { label-declarations block-item-list }
3273 __extension__ nested-declaration
3274 nested-function-definition
3278 label-declarations label-declaration
3281 __label__ identifier-list ;
3283 Allowing the mixing of declarations and code is new in C99. The
3284 GNU syntax also permits (not shown above) labels at the end of
3285 compound statements, which yield an error. We don't allow labels
3286 on declarations; this might seem like a natural extension, but
3287 there would be a conflict between attributes on the label and
3288 prefix attributes on the declaration. ??? The syntax follows the
3289 old parser in requiring something after label declarations.
3290 Although they are erroneous if the labels declared aren't defined,
3291 is it useful for the syntax to be this way?
3303 c_parser_compound_statement (c_parser
*parser
)
3306 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3307 return error_mark_node
;
3308 stmt
= c_begin_compound_stmt (true);
3309 c_parser_compound_statement_nostart (parser
);
3310 return c_end_compound_stmt (stmt
, true);
3313 /* Parse a compound statement except for the opening brace. This is
3314 used for parsing both compound statements and statement expressions
3315 (which follow different paths to handling the opening). */
3318 c_parser_compound_statement_nostart (c_parser
*parser
)
3320 bool last_stmt
= false;
3321 bool last_label
= false;
3322 location_t label_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
3323 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3325 c_parser_consume_token (parser
);
3328 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3330 location_t err_loc
= c_parser_peek_token (parser
)->location
;
3331 /* Read zero or more forward-declarations for labels that nested
3332 functions can jump to. */
3333 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3335 c_parser_consume_token (parser
);
3336 /* Any identifiers, including those declared as type names,
3341 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3343 c_parser_error (parser
, "expected identifier");
3347 = declare_label (c_parser_peek_token (parser
)->value
);
3348 C_DECLARED_LABEL_FLAG (label
) = 1;
3349 add_stmt (build_stmt (DECL_EXPR
, label
));
3350 c_parser_consume_token (parser
);
3351 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3352 c_parser_consume_token (parser
);
3356 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3358 pedwarn (err_loc
, OPT_pedantic
, "ISO C forbids label declarations");
3360 /* We must now have at least one statement, label or declaration. */
3361 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3363 c_parser_error (parser
, "expected declaration or statement");
3364 c_parser_consume_token (parser
);
3367 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3369 location_t loc
= c_parser_peek_token (parser
)->location
;
3370 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3371 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3372 || (c_parser_next_token_is (parser
, CPP_NAME
)
3373 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3375 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3376 label_loc
= c_parser_peek_2nd_token (parser
)->location
;
3378 label_loc
= c_parser_peek_token (parser
)->location
;
3381 c_parser_label (parser
);
3383 else if (!last_label
3384 && c_parser_next_token_starts_declspecs (parser
))
3387 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3390 (pedantic
&& !flag_isoc99
)
3392 : OPT_Wdeclaration_after_statement
,
3393 "ISO C90 forbids mixed declarations and code");
3396 else if (!last_label
3397 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3399 /* __extension__ can start a declaration, but is also an
3400 unary operator that can start an expression. Consume all
3401 but the last of a possible series of __extension__ to
3403 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3404 && (c_parser_peek_2nd_token (parser
)->keyword
3406 c_parser_consume_token (parser
);
3407 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3410 ext
= disable_extension_diagnostics ();
3411 c_parser_consume_token (parser
);
3413 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3414 /* Following the old parser, __extension__ does not
3415 disable this diagnostic. */
3416 restore_extension_diagnostics (ext
);
3418 pedwarn_c90 (loc
, (pedantic
&& !flag_isoc99
)
3420 : OPT_Wdeclaration_after_statement
,
3421 "ISO C90 forbids mixed declarations and code");
3427 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3429 /* External pragmas, and some omp pragmas, are not associated
3430 with regular c code, and so are not to be considered statements
3431 syntactically. This ensures that the user doesn't put them
3432 places that would turn into syntax errors if the directive
3434 if (c_parser_pragma (parser
, pragma_compound
))
3435 last_label
= false, last_stmt
= true;
3437 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3439 c_parser_error (parser
, "expected declaration or statement");
3442 else if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3444 if (parser
->in_if_block
)
3446 error_at (loc
, """expected %<}%> before %<else%>");
3451 error_at (loc
, "%<else%> without a previous %<if%>");
3452 c_parser_consume_token (parser
);
3461 c_parser_statement_after_labels (parser
);
3464 parser
->error
= false;
3467 error_at (label_loc
, "label at end of compound statement");
3468 c_parser_consume_token (parser
);
3471 /* Parse a label (C90 6.6.1, C99 6.8.1).
3474 identifier : attributes[opt]
3475 case constant-expression :
3481 case constant-expression ... constant-expression :
3483 The use of attributes on labels is a GNU extension. The syntax in
3484 GNU C accepts any expressions without commas, non-constant
3485 expressions being rejected later. */
3488 c_parser_label (c_parser
*parser
)
3490 location_t loc1
= c_parser_peek_token (parser
)->location
;
3491 tree label
= NULL_TREE
;
3492 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3495 c_parser_consume_token (parser
);
3496 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3497 if (c_parser_next_token_is (parser
, CPP_COLON
))
3499 c_parser_consume_token (parser
);
3500 label
= do_case (exp1
, NULL_TREE
);
3502 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3504 c_parser_consume_token (parser
);
3505 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3506 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3507 label
= do_case (exp1
, exp2
);
3510 c_parser_error (parser
, "expected %<:%> or %<...%>");
3512 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3514 c_parser_consume_token (parser
);
3515 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3516 label
= do_case (NULL_TREE
, NULL_TREE
);
3520 tree name
= c_parser_peek_token (parser
)->value
;
3523 location_t loc2
= c_parser_peek_token (parser
)->location
;
3524 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3525 c_parser_consume_token (parser
);
3526 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3527 c_parser_consume_token (parser
);
3528 attrs
= c_parser_attributes (parser
);
3529 tlab
= define_label (loc2
, name
);
3532 decl_attributes (&tlab
, attrs
, 0);
3533 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3538 SET_EXPR_LOCATION (label
, loc1
);
3539 if (c_parser_next_token_starts_declspecs (parser
)
3540 && !(c_parser_next_token_is (parser
, CPP_NAME
)
3541 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3543 error_at (c_parser_peek_token (parser
)->location
,
3544 "a label can only be part of a statement and "
3545 "a declaration is not a statement");
3546 c_parser_declaration_or_fndef (parser
, /*fndef_ok*/ false,
3547 /*nested*/ true, /*empty_ok*/ false,
3548 /*start_attr_ok*/ true);
3553 /* Parse a statement (C90 6.6, C99 6.8).
3558 expression-statement
3566 expression-statement:
3569 selection-statement:
3573 iteration-statement:
3582 return expression[opt] ;
3595 objc-throw-statement
3596 objc-try-catch-statement
3597 objc-synchronized-statement
3599 objc-throw-statement:
3613 parallel-for-construct
3614 parallel-sections-construct
3621 parallel-directive structured-block
3624 for-directive iteration-statement
3627 sections-directive section-scope
3630 single-directive structured-block
3632 parallel-for-construct:
3633 parallel-for-directive iteration-statement
3635 parallel-sections-construct:
3636 parallel-sections-directive section-scope
3639 master-directive structured-block
3642 critical-directive structured-block
3645 atomic-directive expression-statement
3648 ordered-directive structured-block */
3651 c_parser_statement (c_parser
*parser
)
3653 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3654 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3655 || (c_parser_next_token_is (parser
, CPP_NAME
)
3656 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3657 c_parser_label (parser
);
3658 c_parser_statement_after_labels (parser
);
3661 /* Parse a statement, other than a labeled statement. */
3664 c_parser_statement_after_labels (c_parser
*parser
)
3666 location_t loc
= c_parser_peek_token (parser
)->location
;
3667 tree stmt
= NULL_TREE
;
3668 bool in_if_block
= parser
->in_if_block
;
3669 parser
->in_if_block
= false;
3670 switch (c_parser_peek_token (parser
)->type
)
3672 case CPP_OPEN_BRACE
:
3673 add_stmt (c_parser_compound_statement (parser
));
3676 switch (c_parser_peek_token (parser
)->keyword
)
3679 c_parser_if_statement (parser
);
3682 c_parser_switch_statement (parser
);
3685 c_parser_while_statement (parser
);
3688 c_parser_do_statement (parser
);
3691 c_parser_for_statement (parser
);
3694 c_parser_consume_token (parser
);
3695 if (c_parser_next_token_is (parser
, CPP_NAME
))
3697 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3698 c_parser_consume_token (parser
);
3700 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3702 c_parser_consume_token (parser
);
3703 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3706 c_parser_error (parser
, "expected identifier or %<*%>");
3707 goto expect_semicolon
;
3709 c_parser_consume_token (parser
);
3710 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3711 goto expect_semicolon
;
3713 c_parser_consume_token (parser
);
3714 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3715 goto expect_semicolon
;
3717 c_parser_consume_token (parser
);
3718 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3720 stmt
= c_finish_return (NULL_TREE
);
3721 c_parser_consume_token (parser
);
3725 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3726 goto expect_semicolon
;
3730 stmt
= c_parser_asm_statement (parser
);
3733 gcc_assert (c_dialect_objc ());
3734 c_parser_consume_token (parser
);
3735 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3737 stmt
= objc_build_throw_stmt (NULL_TREE
);
3738 c_parser_consume_token (parser
);
3743 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3744 goto expect_semicolon
;
3748 gcc_assert (c_dialect_objc ());
3749 c_parser_objc_try_catch_statement (parser
);
3751 case RID_AT_SYNCHRONIZED
:
3752 gcc_assert (c_dialect_objc ());
3753 c_parser_objc_synchronized_statement (parser
);
3760 c_parser_consume_token (parser
);
3762 case CPP_CLOSE_PAREN
:
3763 case CPP_CLOSE_SQUARE
:
3764 /* Avoid infinite loop in error recovery:
3765 c_parser_skip_until_found stops at a closing nesting
3766 delimiter without consuming it, but here we need to consume
3767 it to proceed further. */
3768 c_parser_error (parser
, "expected statement");
3769 c_parser_consume_token (parser
);
3772 c_parser_pragma (parser
, pragma_stmt
);
3776 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3778 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3781 /* Two cases cannot and do not have line numbers associated: If stmt
3782 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3783 cannot hold line numbers. But that's OK because the statement
3784 will either be changed to a MODIFY_EXPR during gimplification of
3785 the statement expr, or discarded. If stmt was compound, but
3786 without new variables, we will have skipped the creation of a
3787 BIND and will have a bare STATEMENT_LIST. But that's OK because
3788 (recursively) all of the component statements should already have
3789 line numbers assigned. ??? Can we discard no-op statements
3791 protected_set_expr_location (stmt
, loc
);
3793 parser
->in_if_block
= in_if_block
;
3796 /* Parse the condition from an if, do, while or for statements. */
3799 c_parser_condition (c_parser
*parser
)
3803 loc
= c_parser_peek_token (parser
)->location
;
3804 cond
= c_objc_common_truthvalue_conversion
3805 (loc
, c_parser_expression_conv (parser
).value
);
3806 protected_set_expr_location (cond
, loc
);
3807 if (warn_sequence_point
)
3808 verify_sequence_points (cond
);
3812 /* Parse a parenthesized condition from an if, do or while statement.
3818 c_parser_paren_condition (c_parser
*parser
)
3821 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3822 return error_mark_node
;
3823 cond
= c_parser_condition (parser
);
3824 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3828 /* Parse a statement which is a block in C99. */
3831 c_parser_c99_block_statement (c_parser
*parser
)
3833 tree block
= c_begin_compound_stmt (flag_isoc99
);
3834 c_parser_statement (parser
);
3835 return c_end_compound_stmt (block
, flag_isoc99
);
3838 /* Parse the body of an if statement. This is just parsing a
3839 statement but (a) it is a block in C99, (b) we track whether the
3840 body is an if statement for the sake of -Wparentheses warnings, (c)
3841 we handle an empty body specially for the sake of -Wempty-body
3842 warnings, and (d) we call parser_compound_statement directly
3843 because c_parser_statement_after_labels resets
3844 parser->in_if_block. */
3847 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3849 tree block
= c_begin_compound_stmt (flag_isoc99
);
3850 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3851 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3852 || (c_parser_next_token_is (parser
, CPP_NAME
)
3853 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3854 c_parser_label (parser
);
3855 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3856 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3858 location_t loc
= c_parser_peek_token (parser
)->location
;
3859 add_stmt (build_empty_stmt ());
3860 c_parser_consume_token (parser
);
3861 if (!c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3862 warning_at (loc
, OPT_Wempty_body
,
3863 "suggest braces around empty body in an %<if%> statement");
3865 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3866 add_stmt (c_parser_compound_statement (parser
));
3868 c_parser_statement_after_labels (parser
);
3869 return c_end_compound_stmt (block
, flag_isoc99
);
3872 /* Parse the else body of an if statement. This is just parsing a
3873 statement but (a) it is a block in C99, (b) we handle an empty body
3874 specially for the sake of -Wempty-body warnings. */
3877 c_parser_else_body (c_parser
*parser
)
3879 tree block
= c_begin_compound_stmt (flag_isoc99
);
3880 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3881 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3882 || (c_parser_next_token_is (parser
, CPP_NAME
)
3883 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3884 c_parser_label (parser
);
3885 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3887 warning_at (c_parser_peek_token (parser
)->location
,
3889 "suggest braces around empty body in an %<else%> statement");
3890 add_stmt (build_empty_stmt ());
3891 c_parser_consume_token (parser
);
3894 c_parser_statement_after_labels (parser
);
3895 return c_end_compound_stmt (block
, flag_isoc99
);
3898 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3901 if ( expression ) statement
3902 if ( expression ) statement else statement
3906 c_parser_if_statement (c_parser
*parser
)
3911 bool first_if
= false;
3912 tree first_body
, second_body
;
3915 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3916 c_parser_consume_token (parser
);
3917 block
= c_begin_compound_stmt (flag_isoc99
);
3918 loc
= c_parser_peek_token (parser
)->location
;
3919 cond
= c_parser_paren_condition (parser
);
3920 in_if_block
= parser
->in_if_block
;
3921 parser
->in_if_block
= true;
3922 first_body
= c_parser_if_body (parser
, &first_if
);
3923 parser
->in_if_block
= in_if_block
;
3924 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3926 c_parser_consume_token (parser
);
3927 second_body
= c_parser_else_body (parser
);
3930 second_body
= NULL_TREE
;
3931 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3932 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3935 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3938 switch (expression) statement
3942 c_parser_switch_statement (c_parser
*parser
)
3944 tree block
, expr
, body
, save_break
;
3945 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3946 c_parser_consume_token (parser
);
3947 block
= c_begin_compound_stmt (flag_isoc99
);
3948 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3950 expr
= c_parser_expression (parser
).value
;
3951 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3954 expr
= error_mark_node
;
3955 c_start_case (expr
);
3956 save_break
= c_break_label
;
3957 c_break_label
= NULL_TREE
;
3958 body
= c_parser_c99_block_statement (parser
);
3959 c_finish_case (body
);
3961 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3962 c_break_label
= save_break
;
3963 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3966 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3969 while (expression) statement
3973 c_parser_while_statement (c_parser
*parser
)
3975 tree block
, cond
, body
, save_break
, save_cont
;
3977 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3978 c_parser_consume_token (parser
);
3979 block
= c_begin_compound_stmt (flag_isoc99
);
3980 loc
= c_parser_peek_token (parser
)->location
;
3981 cond
= c_parser_paren_condition (parser
);
3982 save_break
= c_break_label
;
3983 c_break_label
= NULL_TREE
;
3984 save_cont
= c_cont_label
;
3985 c_cont_label
= NULL_TREE
;
3986 body
= c_parser_c99_block_statement (parser
);
3987 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3988 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3989 c_break_label
= save_break
;
3990 c_cont_label
= save_cont
;
3993 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3996 do statement while ( expression ) ;
4000 c_parser_do_statement (c_parser
*parser
)
4002 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
4004 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
4005 c_parser_consume_token (parser
);
4006 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4007 warning_at (c_parser_peek_token (parser
)->location
,
4009 "suggest braces around empty body in %<do%> statement");
4010 block
= c_begin_compound_stmt (flag_isoc99
);
4011 loc
= c_parser_peek_token (parser
)->location
;
4012 save_break
= c_break_label
;
4013 c_break_label
= NULL_TREE
;
4014 save_cont
= c_cont_label
;
4015 c_cont_label
= NULL_TREE
;
4016 body
= c_parser_c99_block_statement (parser
);
4017 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
4018 new_break
= c_break_label
;
4019 c_break_label
= save_break
;
4020 new_cont
= c_cont_label
;
4021 c_cont_label
= save_cont
;
4022 cond
= c_parser_paren_condition (parser
);
4023 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4024 c_parser_skip_to_end_of_block_or_statement (parser
);
4025 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
4026 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4029 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4032 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4033 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4035 The form with a declaration is new in C99.
4037 ??? In accordance with the old parser, the declaration may be a
4038 nested function, which is then rejected in check_for_loop_decls,
4039 but does it make any sense for this to be included in the grammar?
4040 Note in particular that the nested function does not include a
4041 trailing ';', whereas the "declaration" production includes one.
4042 Also, can we reject bad declarations earlier and cheaper than
4043 check_for_loop_decls? */
4046 c_parser_for_statement (c_parser
*parser
)
4048 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4050 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4051 loc
= c_parser_peek_token (parser
)->location
;
4052 c_parser_consume_token (parser
);
4053 block
= c_begin_compound_stmt (flag_isoc99
);
4054 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4056 /* Parse the initialization declaration or expression. */
4057 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4059 c_parser_consume_token (parser
);
4060 c_finish_expr_stmt (NULL_TREE
);
4062 else if (c_parser_next_token_starts_declspecs (parser
))
4064 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4065 check_for_loop_decls ();
4067 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4069 /* __extension__ can start a declaration, but is also an
4070 unary operator that can start an expression. Consume all
4071 but the last of a possible series of __extension__ to
4073 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4074 && (c_parser_peek_2nd_token (parser
)->keyword
4076 c_parser_consume_token (parser
);
4077 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4080 ext
= disable_extension_diagnostics ();
4081 c_parser_consume_token (parser
);
4082 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4083 restore_extension_diagnostics (ext
);
4084 check_for_loop_decls ();
4092 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4093 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4095 /* Parse the loop condition. */
4096 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4098 c_parser_consume_token (parser
);
4103 cond
= c_parser_condition (parser
);
4104 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4106 /* Parse the increment expression. */
4107 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4108 incr
= c_process_expr_stmt (NULL_TREE
);
4110 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4111 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4115 cond
= error_mark_node
;
4116 incr
= error_mark_node
;
4118 save_break
= c_break_label
;
4119 c_break_label
= NULL_TREE
;
4120 save_cont
= c_cont_label
;
4121 c_cont_label
= NULL_TREE
;
4122 body
= c_parser_c99_block_statement (parser
);
4123 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4124 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4125 c_break_label
= save_break
;
4126 c_cont_label
= save_cont
;
4129 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4130 statement with inputs, outputs, clobbers, and volatile tag
4134 asm type-qualifier[opt] ( asm-argument ) ;
4138 asm-string-literal : asm-operands[opt]
4139 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4140 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4142 Qualifiers other than volatile are accepted in the syntax but
4146 c_parser_asm_statement (c_parser
*parser
)
4148 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4150 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4151 c_parser_consume_token (parser
);
4152 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4154 quals
= c_parser_peek_token (parser
)->value
;
4155 c_parser_consume_token (parser
);
4157 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4158 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4160 warning_at (c_parser_peek_token (parser
)->location
,
4162 "%E qualifier ignored on asm",
4163 c_parser_peek_token (parser
)->value
);
4165 c_parser_consume_token (parser
);
4169 /* ??? Follow the C++ parser rather than using the
4170 lex_untranslated_string kludge. */
4171 parser
->lex_untranslated_string
= true;
4172 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4174 parser
->lex_untranslated_string
= false;
4177 str
= c_parser_asm_string_literal (parser
);
4178 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4181 outputs
= NULL_TREE
;
4183 clobbers
= NULL_TREE
;
4186 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4188 parser
->lex_untranslated_string
= false;
4189 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4193 /* Parse outputs. */
4194 if (c_parser_next_token_is (parser
, CPP_COLON
)
4195 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4196 outputs
= NULL_TREE
;
4198 outputs
= c_parser_asm_operands (parser
, false);
4199 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4202 clobbers
= NULL_TREE
;
4205 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4207 parser
->lex_untranslated_string
= false;
4208 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4212 if (c_parser_next_token_is (parser
, CPP_COLON
)
4213 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4216 inputs
= c_parser_asm_operands (parser
, true);
4217 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4219 clobbers
= NULL_TREE
;
4222 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4224 parser
->lex_untranslated_string
= false;
4225 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4228 /* Parse clobbers. */
4229 clobbers
= c_parser_asm_clobbers (parser
);
4231 parser
->lex_untranslated_string
= false;
4232 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4234 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4237 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4238 c_parser_skip_to_end_of_block_or_statement (parser
);
4239 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4244 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4245 not outputs), apply the default conversion of functions and arrays
4250 asm-operands , asm-operand
4253 asm-string-literal ( expression )
4254 [ identifier ] asm-string-literal ( expression )
4258 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4260 tree list
= NULL_TREE
;
4265 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4267 c_parser_consume_token (parser
);
4268 if (c_parser_next_token_is (parser
, CPP_NAME
))
4270 tree id
= c_parser_peek_token (parser
)->value
;
4271 c_parser_consume_token (parser
);
4272 name
= build_string (IDENTIFIER_LENGTH (id
),
4273 IDENTIFIER_POINTER (id
));
4277 c_parser_error (parser
, "expected identifier");
4278 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4281 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4286 str
= c_parser_asm_string_literal (parser
);
4287 if (str
== NULL_TREE
)
4289 parser
->lex_untranslated_string
= false;
4290 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4292 parser
->lex_untranslated_string
= true;
4295 expr
= c_parser_expression (parser
);
4297 expr
= default_function_array_conversion (expr
);
4298 parser
->lex_untranslated_string
= true;
4299 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4301 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4304 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4306 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4307 c_parser_consume_token (parser
);
4314 /* Parse asm clobbers, a GNU extension.
4318 asm-clobbers , asm-string-literal
4322 c_parser_asm_clobbers (c_parser
*parser
)
4324 tree list
= NULL_TREE
;
4327 tree str
= c_parser_asm_string_literal (parser
);
4329 list
= tree_cons (NULL_TREE
, str
, list
);
4332 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4333 c_parser_consume_token (parser
);
4340 /* Parse an expression other than a compound expression; that is, an
4341 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4342 NULL then it is an Objective-C message expression which is the
4343 primary-expression starting the expression as an initializer.
4345 assignment-expression:
4346 conditional-expression
4347 unary-expression assignment-operator assignment-expression
4349 assignment-operator: one of
4350 = *= /= %= += -= <<= >>= &= ^= |=
4352 In GNU C we accept any conditional expression on the LHS and
4353 diagnose the invalid lvalue rather than producing a syntax
4356 static struct c_expr
4357 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4359 struct c_expr lhs
, rhs
, ret
;
4360 enum tree_code code
;
4361 location_t op_location
;
4362 gcc_assert (!after
|| c_dialect_objc ());
4363 lhs
= c_parser_conditional_expression (parser
, after
);
4364 op_location
= c_parser_peek_token (parser
)->location
;
4365 switch (c_parser_peek_token (parser
)->type
)
4374 code
= TRUNC_DIV_EXPR
;
4377 code
= TRUNC_MOD_EXPR
;
4392 code
= BIT_AND_EXPR
;
4395 code
= BIT_XOR_EXPR
;
4398 code
= BIT_IOR_EXPR
;
4403 c_parser_consume_token (parser
);
4404 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4405 rhs
= default_function_array_conversion (rhs
);
4406 ret
.value
= build_modify_expr (op_location
, lhs
.value
, code
, rhs
.value
);
4407 if (code
== NOP_EXPR
)
4408 ret
.original_code
= MODIFY_EXPR
;
4411 TREE_NO_WARNING (ret
.value
) = 1;
4412 ret
.original_code
= ERROR_MARK
;
4417 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4418 is not NULL then it is an Objective-C message expression which is
4419 the primary-expression starting the expression as an initializer.
4421 conditional-expression:
4422 logical-OR-expression
4423 logical-OR-expression ? expression : conditional-expression
4427 conditional-expression:
4428 logical-OR-expression ? : conditional-expression
4431 static struct c_expr
4432 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4434 struct c_expr cond
, exp1
, exp2
, ret
;
4435 location_t cond_loc
;
4437 gcc_assert (!after
|| c_dialect_objc ());
4439 cond_loc
= c_parser_peek_token (parser
)->location
;
4440 cond
= c_parser_binary_expression (parser
, after
);
4441 protected_set_expr_location (cond
.value
, cond_loc
);
4443 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4445 cond
= default_function_array_conversion (cond
);
4446 c_parser_consume_token (parser
);
4447 if (c_parser_next_token_is (parser
, CPP_COLON
))
4449 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
4450 "ISO C forbids omitting the middle term of a ?: expression");
4451 /* Make sure first operand is calculated only once. */
4452 exp1
.value
= save_expr (default_conversion (cond
.value
));
4453 cond
.value
= c_objc_common_truthvalue_conversion (cond_loc
, exp1
.value
);
4454 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4459 = c_objc_common_truthvalue_conversion
4460 (cond_loc
, default_conversion (cond
.value
));
4461 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4462 exp1
= c_parser_expression_conv (parser
);
4463 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4464 - (cond
.value
== truthvalue_false_node
));
4466 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4468 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4469 ret
.value
= error_mark_node
;
4470 ret
.original_code
= ERROR_MARK
;
4473 exp2
= c_parser_conditional_expression (parser
, NULL
);
4474 exp2
= default_function_array_conversion (exp2
);
4475 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4476 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4477 ret
.original_code
= ERROR_MARK
;
4481 /* Parse a binary expression; that is, a logical-OR-expression (C90
4482 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4483 an Objective-C message expression which is the primary-expression
4484 starting the expression as an initializer.
4486 multiplicative-expression:
4488 multiplicative-expression * cast-expression
4489 multiplicative-expression / cast-expression
4490 multiplicative-expression % cast-expression
4492 additive-expression:
4493 multiplicative-expression
4494 additive-expression + multiplicative-expression
4495 additive-expression - multiplicative-expression
4499 shift-expression << additive-expression
4500 shift-expression >> additive-expression
4502 relational-expression:
4504 relational-expression < shift-expression
4505 relational-expression > shift-expression
4506 relational-expression <= shift-expression
4507 relational-expression >= shift-expression
4509 equality-expression:
4510 relational-expression
4511 equality-expression == relational-expression
4512 equality-expression != relational-expression
4516 AND-expression & equality-expression
4518 exclusive-OR-expression:
4520 exclusive-OR-expression ^ AND-expression
4522 inclusive-OR-expression:
4523 exclusive-OR-expression
4524 inclusive-OR-expression | exclusive-OR-expression
4526 logical-AND-expression:
4527 inclusive-OR-expression
4528 logical-AND-expression && inclusive-OR-expression
4530 logical-OR-expression:
4531 logical-AND-expression
4532 logical-OR-expression || logical-AND-expression
4535 static struct c_expr
4536 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4538 /* A binary expression is parsed using operator-precedence parsing,
4539 with the operands being cast expressions. All the binary
4540 operators are left-associative. Thus a binary expression is of
4543 E0 op1 E1 op2 E2 ...
4545 which we represent on a stack. On the stack, the precedence
4546 levels are strictly increasing. When a new operator is
4547 encountered of higher precedence than that at the top of the
4548 stack, it is pushed; its LHS is the top expression, and its RHS
4549 is everything parsed until it is popped. When a new operator is
4550 encountered with precedence less than or equal to that at the top
4551 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4552 by the result of the operation until the operator at the top of
4553 the stack has lower precedence than the new operator or there is
4554 only one element on the stack; then the top expression is the LHS
4555 of the new operator. In the case of logical AND and OR
4556 expressions, we also need to adjust skip_evaluation as
4557 appropriate when the operators are pushed and popped. */
4559 /* The precedence levels, where 0 is a dummy lowest level used for
4560 the bottom of the stack. */
4576 /* The expression at this stack level. */
4578 /* The precedence of the operator on its left, PREC_NONE at the
4579 bottom of the stack. */
4581 /* The operation on its left. */
4585 /* Location of the binary operator. */
4586 location_t binary_loc
= UNKNOWN_LOCATION
; /* Quiet warning. */
4589 switch (stack[sp].op) \
4591 case TRUTH_ANDIF_EXPR: \
4592 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4594 case TRUTH_ORIF_EXPR: \
4595 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4600 stack[sp - 1].expr \
4601 = default_function_array_conversion (stack[sp - 1].expr); \
4603 = default_function_array_conversion (stack[sp].expr); \
4604 stack[sp - 1].expr = parser_build_binary_op (binary_loc, \
4606 stack[sp - 1].expr, \
4610 gcc_assert (!after
|| c_dialect_objc ());
4611 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4612 stack
[0].prec
= PREC_NONE
;
4617 enum tree_code ocode
;
4620 switch (c_parser_peek_token (parser
)->type
)
4628 ocode
= TRUNC_DIV_EXPR
;
4632 ocode
= TRUNC_MOD_EXPR
;
4644 ocode
= LSHIFT_EXPR
;
4648 ocode
= RSHIFT_EXPR
;
4662 case CPP_GREATER_EQ
:
4675 oprec
= PREC_BITAND
;
4676 ocode
= BIT_AND_EXPR
;
4679 oprec
= PREC_BITXOR
;
4680 ocode
= BIT_XOR_EXPR
;
4684 ocode
= BIT_IOR_EXPR
;
4687 oprec
= PREC_LOGAND
;
4688 ocode
= TRUTH_ANDIF_EXPR
;
4692 ocode
= TRUTH_ORIF_EXPR
;
4695 /* Not a binary operator, so end of the binary
4699 binary_loc
= c_parser_peek_token (parser
)->location
;
4700 c_parser_consume_token (parser
);
4701 while (oprec
<= stack
[sp
].prec
)
4705 case TRUTH_ANDIF_EXPR
:
4707 = default_function_array_conversion (stack
[sp
].expr
);
4708 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4709 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4710 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4712 case TRUTH_ORIF_EXPR
:
4714 = default_function_array_conversion (stack
[sp
].expr
);
4715 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4716 (binary_loc
, default_conversion (stack
[sp
].expr
.value
));
4717 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4723 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4724 stack
[sp
].prec
= oprec
;
4725 stack
[sp
].op
= ocode
;
4730 return stack
[0].expr
;
4734 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4735 NULL then it is an Objective-C message expression which is the
4736 primary-expression starting the expression as an initializer.
4740 ( type-name ) unary-expression
4743 static struct c_expr
4744 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4746 gcc_assert (!after
|| c_dialect_objc ());
4748 return c_parser_postfix_expression_after_primary (parser
, *after
);
4749 /* If the expression begins with a parenthesized type name, it may
4750 be either a cast or a compound literal; we need to see whether
4751 the next character is '{' to tell the difference. If not, it is
4752 an unary expression. */
4753 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4754 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4756 struct c_type_name
*type_name
;
4759 c_parser_consume_token (parser
);
4760 type_name
= c_parser_type_name (parser
);
4761 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4762 if (type_name
== NULL
)
4764 ret
.value
= error_mark_node
;
4765 ret
.original_code
= ERROR_MARK
;
4769 /* Save casted types in the function's used types hash table. */
4770 used_types_insert (type_name
->specs
->type
);
4772 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4773 return c_parser_postfix_expression_after_paren_type (parser
,
4775 expr
= c_parser_cast_expression (parser
, NULL
);
4776 expr
= default_function_array_conversion (expr
);
4777 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4778 ret
.original_code
= ERROR_MARK
;
4782 return c_parser_unary_expression (parser
);
4785 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4791 unary-operator cast-expression
4792 sizeof unary-expression
4793 sizeof ( type-name )
4795 unary-operator: one of
4801 __alignof__ unary-expression
4802 __alignof__ ( type-name )
4805 unary-operator: one of
4806 __extension__ __real__ __imag__
4808 In addition, the GNU syntax treats ++ and -- as unary operators, so
4809 they may be applied to cast expressions with errors for non-lvalues
4812 static struct c_expr
4813 c_parser_unary_expression (c_parser
*parser
)
4816 struct c_expr ret
, op
;
4817 location_t loc
= c_parser_peek_token (parser
)->location
;
4818 switch (c_parser_peek_token (parser
)->type
)
4821 c_parser_consume_token (parser
);
4822 op
= c_parser_cast_expression (parser
, NULL
);
4823 op
= default_function_array_conversion (op
);
4824 return parser_build_unary_op (PREINCREMENT_EXPR
, op
, loc
);
4825 case CPP_MINUS_MINUS
:
4826 c_parser_consume_token (parser
);
4827 op
= c_parser_cast_expression (parser
, NULL
);
4828 op
= default_function_array_conversion (op
);
4829 return parser_build_unary_op (PREDECREMENT_EXPR
, op
, loc
);
4831 c_parser_consume_token (parser
);
4832 return parser_build_unary_op (ADDR_EXPR
,
4833 c_parser_cast_expression (parser
, NULL
),
4836 c_parser_consume_token (parser
);
4837 op
= c_parser_cast_expression (parser
, NULL
);
4838 op
= default_function_array_conversion (op
);
4839 ret
.value
= build_indirect_ref (loc
, op
.value
, "unary *");
4840 ret
.original_code
= ERROR_MARK
;
4843 if (!c_dialect_objc () && !in_system_header
)
4844 warning_at (c_parser_peek_token (parser
)->location
,
4846 "traditional C rejects the unary plus operator");
4847 c_parser_consume_token (parser
);
4848 op
= c_parser_cast_expression (parser
, NULL
);
4849 op
= default_function_array_conversion (op
);
4850 return parser_build_unary_op (CONVERT_EXPR
, op
, loc
);
4852 c_parser_consume_token (parser
);
4853 op
= c_parser_cast_expression (parser
, NULL
);
4854 op
= default_function_array_conversion (op
);
4855 return parser_build_unary_op (NEGATE_EXPR
, op
, loc
);
4857 c_parser_consume_token (parser
);
4858 op
= c_parser_cast_expression (parser
, NULL
);
4859 op
= default_function_array_conversion (op
);
4860 return parser_build_unary_op (BIT_NOT_EXPR
, op
, loc
);
4862 c_parser_consume_token (parser
);
4863 op
= c_parser_cast_expression (parser
, NULL
);
4864 op
= default_function_array_conversion (op
);
4865 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
, loc
);
4867 /* Refer to the address of a label as a pointer. */
4868 c_parser_consume_token (parser
);
4869 if (c_parser_next_token_is (parser
, CPP_NAME
))
4871 ret
.value
= finish_label_address_expr
4872 (c_parser_peek_token (parser
)->value
, loc
);
4873 c_parser_consume_token (parser
);
4877 c_parser_error (parser
, "expected identifier");
4878 ret
.value
= error_mark_node
;
4880 ret
.original_code
= ERROR_MARK
;
4883 switch (c_parser_peek_token (parser
)->keyword
)
4886 return c_parser_sizeof_expression (parser
);
4888 return c_parser_alignof_expression (parser
);
4890 c_parser_consume_token (parser
);
4891 ext
= disable_extension_diagnostics ();
4892 ret
= c_parser_cast_expression (parser
, NULL
);
4893 restore_extension_diagnostics (ext
);
4896 c_parser_consume_token (parser
);
4897 op
= c_parser_cast_expression (parser
, NULL
);
4898 op
= default_function_array_conversion (op
);
4899 return parser_build_unary_op (REALPART_EXPR
, op
, loc
);
4901 c_parser_consume_token (parser
);
4902 op
= c_parser_cast_expression (parser
, NULL
);
4903 op
= default_function_array_conversion (op
);
4904 return parser_build_unary_op (IMAGPART_EXPR
, op
, loc
);
4906 return c_parser_postfix_expression (parser
);
4909 return c_parser_postfix_expression (parser
);
4913 /* Parse a sizeof expression. */
4915 static struct c_expr
4916 c_parser_sizeof_expression (c_parser
*parser
)
4919 location_t expr_loc
;
4920 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4921 c_parser_consume_token (parser
);
4924 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4925 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4927 /* Either sizeof ( type-name ) or sizeof unary-expression
4928 starting with a compound literal. */
4929 struct c_type_name
*type_name
;
4930 c_parser_consume_token (parser
);
4931 expr_loc
= c_parser_peek_token (parser
)->location
;
4932 type_name
= c_parser_type_name (parser
);
4933 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4934 if (type_name
== NULL
)
4939 ret
.value
= error_mark_node
;
4940 ret
.original_code
= ERROR_MARK
;
4943 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4945 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4949 /* sizeof ( type-name ). */
4952 if (type_name
->declarator
->kind
== cdk_array
4953 && type_name
->declarator
->u
.array
.vla_unspec_p
)
4957 "%<[*]%> not allowed in other than a declaration");
4959 return c_expr_sizeof_type (type_name
);
4963 expr_loc
= c_parser_peek_token (parser
)->location
;
4964 expr
= c_parser_unary_expression (parser
);
4968 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4969 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4970 error_at (expr_loc
, "%<sizeof%> applied to a bit-field");
4971 return c_expr_sizeof_expr (expr
);
4975 /* Parse an alignof expression. */
4977 static struct c_expr
4978 c_parser_alignof_expression (c_parser
*parser
)
4981 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4982 c_parser_consume_token (parser
);
4985 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4986 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4988 /* Either __alignof__ ( type-name ) or __alignof__
4989 unary-expression starting with a compound literal. */
4990 struct c_type_name
*type_name
;
4992 c_parser_consume_token (parser
);
4993 type_name
= c_parser_type_name (parser
);
4994 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4995 if (type_name
== NULL
)
5000 ret
.value
= error_mark_node
;
5001 ret
.original_code
= ERROR_MARK
;
5004 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5006 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5010 /* alignof ( type-name ). */
5013 ret
.value
= c_alignof (groktypename (type_name
));
5014 ret
.original_code
= ERROR_MARK
;
5020 expr
= c_parser_unary_expression (parser
);
5024 ret
.value
= c_alignof_expr (expr
.value
);
5025 ret
.original_code
= ERROR_MARK
;
5030 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
5034 postfix-expression [ expression ]
5035 postfix-expression ( argument-expression-list[opt] )
5036 postfix-expression . identifier
5037 postfix-expression -> identifier
5038 postfix-expression ++
5039 postfix-expression --
5040 ( type-name ) { initializer-list }
5041 ( type-name ) { initializer-list , }
5043 argument-expression-list:
5045 argument-expression-list , argument-expression
5057 (treated as a keyword in GNU C)
5060 ( compound-statement )
5061 __builtin_va_arg ( assignment-expression , type-name )
5062 __builtin_offsetof ( type-name , offsetof-member-designator )
5063 __builtin_choose_expr ( assignment-expression ,
5064 assignment-expression ,
5065 assignment-expression )
5066 __builtin_types_compatible_p ( type-name , type-name )
5068 offsetof-member-designator:
5070 offsetof-member-designator . identifier
5071 offsetof-member-designator [ expression ]
5076 [ objc-receiver objc-message-args ]
5077 @selector ( objc-selector-arg )
5078 @protocol ( identifier )
5079 @encode ( type-name )
5083 static struct c_expr
5084 c_parser_postfix_expression (c_parser
*parser
)
5086 struct c_expr expr
, e1
, e2
, e3
;
5087 struct c_type_name
*t1
, *t2
;
5089 switch (c_parser_peek_token (parser
)->type
)
5092 expr
.value
= c_parser_peek_token (parser
)->value
;
5093 expr
.original_code
= ERROR_MARK
;
5094 loc
= c_parser_peek_token (parser
)->location
;
5095 c_parser_consume_token (parser
);
5096 if (TREE_CODE (expr
.value
) == FIXED_CST
5097 && !targetm
.fixed_point_supported_p ())
5099 error_at (loc
, "fixed-point types not supported for this target");
5100 expr
.value
= error_mark_node
;
5107 expr
.value
= c_parser_peek_token (parser
)->value
;
5108 expr
.original_code
= ERROR_MARK
;
5109 c_parser_consume_token (parser
);
5115 expr
.value
= c_parser_peek_token (parser
)->value
;
5116 expr
.original_code
= STRING_CST
;
5117 c_parser_consume_token (parser
);
5119 case CPP_OBJC_STRING
:
5120 gcc_assert (c_dialect_objc ());
5122 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5123 expr
.original_code
= ERROR_MARK
;
5124 c_parser_consume_token (parser
);
5127 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5129 c_parser_error (parser
, "expected expression");
5130 expr
.value
= error_mark_node
;
5131 expr
.original_code
= ERROR_MARK
;
5135 tree id
= c_parser_peek_token (parser
)->value
;
5136 location_t loc
= c_parser_peek_token (parser
)->location
;
5137 c_parser_consume_token (parser
);
5138 expr
.value
= build_external_ref (id
,
5139 (c_parser_peek_token (parser
)->type
5140 == CPP_OPEN_PAREN
), loc
);
5141 expr
.original_code
= ERROR_MARK
;
5144 case CPP_OPEN_PAREN
:
5145 /* A parenthesized expression, statement expression or compound
5147 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5149 /* A statement expression. */
5151 location_t here
= c_parser_peek_token (parser
)->location
;
5152 c_parser_consume_token (parser
);
5153 c_parser_consume_token (parser
);
5154 if (cur_stmt_list
== NULL
)
5156 error_at (here
, "braced-group within expression allowed "
5157 "only inside a function");
5158 parser
->error
= true;
5159 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5160 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5161 expr
.value
= error_mark_node
;
5162 expr
.original_code
= ERROR_MARK
;
5165 stmt
= c_begin_stmt_expr ();
5166 c_parser_compound_statement_nostart (parser
);
5167 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5169 pedwarn (here
, OPT_pedantic
,
5170 "ISO C forbids braced-groups within expressions");
5171 expr
.value
= c_finish_stmt_expr (stmt
);
5172 expr
.original_code
= ERROR_MARK
;
5174 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5176 /* A compound literal. ??? Can we actually get here rather
5177 than going directly to
5178 c_parser_postfix_expression_after_paren_type from
5180 struct c_type_name
*type_name
;
5181 c_parser_consume_token (parser
);
5182 type_name
= c_parser_type_name (parser
);
5183 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5185 if (type_name
== NULL
)
5187 expr
.value
= error_mark_node
;
5188 expr
.original_code
= ERROR_MARK
;
5191 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5196 /* A parenthesized expression. */
5197 c_parser_consume_token (parser
);
5198 expr
= c_parser_expression (parser
);
5199 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5200 TREE_NO_WARNING (expr
.value
) = 1;
5201 expr
.original_code
= ERROR_MARK
;
5202 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5207 switch (c_parser_peek_token (parser
)->keyword
)
5209 case RID_FUNCTION_NAME
:
5210 case RID_PRETTY_FUNCTION_NAME
:
5211 case RID_C99_FUNCTION_NAME
:
5212 expr
.value
= fname_decl (c_parser_peek_token (parser
)->location
,
5213 c_parser_peek_token (parser
)->keyword
,
5214 c_parser_peek_token (parser
)->value
);
5215 expr
.original_code
= ERROR_MARK
;
5216 c_parser_consume_token (parser
);
5219 c_parser_consume_token (parser
);
5220 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5222 expr
.value
= error_mark_node
;
5223 expr
.original_code
= ERROR_MARK
;
5226 e1
= c_parser_expr_no_commas (parser
, NULL
);
5227 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5229 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5230 expr
.value
= error_mark_node
;
5231 expr
.original_code
= ERROR_MARK
;
5234 t1
= c_parser_type_name (parser
);
5235 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5239 expr
.value
= error_mark_node
;
5240 expr
.original_code
= ERROR_MARK
;
5244 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5245 expr
.original_code
= ERROR_MARK
;
5249 c_parser_consume_token (parser
);
5250 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5252 expr
.value
= error_mark_node
;
5253 expr
.original_code
= ERROR_MARK
;
5256 t1
= c_parser_type_name (parser
);
5259 expr
.value
= error_mark_node
;
5260 expr
.original_code
= ERROR_MARK
;
5263 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5265 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5266 expr
.value
= error_mark_node
;
5267 expr
.original_code
= ERROR_MARK
;
5271 tree type
= groktypename (t1
);
5273 if (type
== error_mark_node
)
5274 offsetof_ref
= error_mark_node
;
5276 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5277 /* Parse the second argument to __builtin_offsetof. We
5278 must have one identifier, and beyond that we want to
5279 accept sub structure and sub array references. */
5280 if (c_parser_next_token_is (parser
, CPP_NAME
))
5282 offsetof_ref
= build_component_ref
5283 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5284 c_parser_consume_token (parser
);
5285 while (c_parser_next_token_is (parser
, CPP_DOT
)
5286 || c_parser_next_token_is (parser
,
5288 || c_parser_next_token_is (parser
,
5291 if (c_parser_next_token_is (parser
, CPP_DEREF
))
5293 loc
= c_parser_peek_token (parser
)->location
;
5294 offsetof_ref
= build_array_ref (offsetof_ref
,
5299 else if (c_parser_next_token_is (parser
, CPP_DOT
))
5302 c_parser_consume_token (parser
);
5303 if (c_parser_next_token_is_not (parser
,
5306 c_parser_error (parser
, "expected identifier");
5309 offsetof_ref
= build_component_ref
5311 c_parser_peek_token (parser
)->value
);
5312 c_parser_consume_token (parser
);
5317 loc
= c_parser_peek_token (parser
)->location
;
5318 c_parser_consume_token (parser
);
5319 idx
= c_parser_expression (parser
).value
;
5320 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5322 offsetof_ref
= build_array_ref (offsetof_ref
, idx
, loc
);
5327 c_parser_error (parser
, "expected identifier");
5328 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5330 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5331 expr
.original_code
= ERROR_MARK
;
5334 case RID_CHOOSE_EXPR
:
5335 c_parser_consume_token (parser
);
5336 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5338 expr
.value
= error_mark_node
;
5339 expr
.original_code
= ERROR_MARK
;
5342 loc
= c_parser_peek_token (parser
)->location
;
5343 e1
= c_parser_expr_no_commas (parser
, NULL
);
5344 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5346 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5347 expr
.value
= error_mark_node
;
5348 expr
.original_code
= ERROR_MARK
;
5351 e2
= c_parser_expr_no_commas (parser
, NULL
);
5352 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5354 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5355 expr
.value
= error_mark_node
;
5356 expr
.original_code
= ERROR_MARK
;
5359 e3
= c_parser_expr_no_commas (parser
, NULL
);
5360 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5365 c
= fold (e1
.value
);
5366 if (TREE_CODE (c
) != INTEGER_CST
)
5368 "first argument to %<__builtin_choose_expr%> not"
5370 expr
= integer_zerop (c
) ? e3
: e2
;
5373 case RID_TYPES_COMPATIBLE_P
:
5374 c_parser_consume_token (parser
);
5375 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5377 expr
.value
= error_mark_node
;
5378 expr
.original_code
= ERROR_MARK
;
5381 t1
= c_parser_type_name (parser
);
5384 expr
.value
= error_mark_node
;
5385 expr
.original_code
= ERROR_MARK
;
5388 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5390 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5391 expr
.value
= error_mark_node
;
5392 expr
.original_code
= ERROR_MARK
;
5395 t2
= c_parser_type_name (parser
);
5398 expr
.value
= error_mark_node
;
5399 expr
.original_code
= ERROR_MARK
;
5402 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5407 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5408 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5410 expr
.value
= comptypes (e1
, e2
)
5411 ? build_int_cst (NULL_TREE
, 1)
5412 : build_int_cst (NULL_TREE
, 0);
5413 expr
.original_code
= ERROR_MARK
;
5416 case RID_AT_SELECTOR
:
5417 gcc_assert (c_dialect_objc ());
5418 c_parser_consume_token (parser
);
5419 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5421 expr
.value
= error_mark_node
;
5422 expr
.original_code
= ERROR_MARK
;
5426 tree sel
= c_parser_objc_selector_arg (parser
);
5427 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5429 expr
.value
= objc_build_selector_expr (sel
);
5430 expr
.original_code
= ERROR_MARK
;
5433 case RID_AT_PROTOCOL
:
5434 gcc_assert (c_dialect_objc ());
5435 c_parser_consume_token (parser
);
5436 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5438 expr
.value
= error_mark_node
;
5439 expr
.original_code
= ERROR_MARK
;
5442 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5444 c_parser_error (parser
, "expected identifier");
5445 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5446 expr
.value
= error_mark_node
;
5447 expr
.original_code
= ERROR_MARK
;
5451 tree id
= c_parser_peek_token (parser
)->value
;
5452 c_parser_consume_token (parser
);
5453 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5455 expr
.value
= objc_build_protocol_expr (id
);
5456 expr
.original_code
= ERROR_MARK
;
5460 /* Extension to support C-structures in the archiver. */
5461 gcc_assert (c_dialect_objc ());
5462 c_parser_consume_token (parser
);
5463 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5465 expr
.value
= error_mark_node
;
5466 expr
.original_code
= ERROR_MARK
;
5469 t1
= c_parser_type_name (parser
);
5472 expr
.value
= error_mark_node
;
5473 expr
.original_code
= ERROR_MARK
;
5474 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5477 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5480 tree type
= groktypename (t1
);
5481 expr
.value
= objc_build_encode_expr (type
);
5482 expr
.original_code
= ERROR_MARK
;
5486 c_parser_error (parser
, "expected expression");
5487 expr
.value
= error_mark_node
;
5488 expr
.original_code
= ERROR_MARK
;
5492 case CPP_OPEN_SQUARE
:
5493 if (c_dialect_objc ())
5495 tree receiver
, args
;
5496 c_parser_consume_token (parser
);
5497 receiver
= c_parser_objc_receiver (parser
);
5498 args
= c_parser_objc_message_args (parser
);
5499 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5501 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5503 expr
.original_code
= ERROR_MARK
;
5506 /* Else fall through to report error. */
5508 c_parser_error (parser
, "expected expression");
5509 expr
.value
= error_mark_node
;
5510 expr
.original_code
= ERROR_MARK
;
5513 return c_parser_postfix_expression_after_primary (parser
, expr
);
5516 /* Parse a postfix expression after a parenthesized type name: the
5517 brace-enclosed initializer of a compound literal, possibly followed
5518 by some postfix operators. This is separate because it is not
5519 possible to tell until after the type name whether a cast
5520 expression has a cast or a compound literal, or whether the operand
5521 of sizeof is a parenthesized type name or starts with a compound
5524 static struct c_expr
5525 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5526 struct c_type_name
*type_name
)
5531 location_t start_loc
;
5532 start_init (NULL_TREE
, NULL
, 0);
5533 type
= groktypename (type_name
);
5534 start_loc
= c_parser_peek_token (parser
)->location
;
5535 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5537 error_at (start_loc
, "compound literal has variable size");
5538 type
= error_mark_node
;
5540 init
= c_parser_braced_init (parser
, type
, false);
5542 maybe_warn_string_init (type
, init
);
5545 pedwarn (start_loc
, OPT_pedantic
, "ISO C90 forbids compound literals");
5546 expr
.value
= build_compound_literal (type
, init
.value
);
5547 expr
.original_code
= ERROR_MARK
;
5548 return c_parser_postfix_expression_after_primary (parser
, expr
);
5551 /* Parse a postfix expression after the initial primary or compound
5552 literal; that is, parse a series of postfix operators. */
5554 static struct c_expr
5555 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5558 tree ident
, idx
, exprlist
;
5559 location_t loc
= c_parser_peek_token (parser
)->location
;
5562 switch (c_parser_peek_token (parser
)->type
)
5564 case CPP_OPEN_SQUARE
:
5565 /* Array reference. */
5566 loc
= c_parser_peek_token (parser
)->location
;
5567 c_parser_consume_token (parser
);
5568 idx
= c_parser_expression (parser
).value
;
5569 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5571 expr
.value
= build_array_ref (expr
.value
, idx
, loc
);
5572 expr
.original_code
= ERROR_MARK
;
5574 case CPP_OPEN_PAREN
:
5575 /* Function call. */
5576 c_parser_consume_token (parser
);
5577 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5578 exprlist
= NULL_TREE
;
5580 exprlist
= c_parser_expr_list (parser
, true);
5581 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5583 expr
.value
= build_function_call (expr
.value
, exprlist
);
5584 expr
.original_code
= ERROR_MARK
;
5585 if (warn_disallowed_functions
)
5586 warn_if_disallowed_function_p (expr
.value
);
5589 /* Structure element reference. */
5590 c_parser_consume_token (parser
);
5591 expr
= default_function_array_conversion (expr
);
5592 if (c_parser_next_token_is (parser
, CPP_NAME
))
5593 ident
= c_parser_peek_token (parser
)->value
;
5596 c_parser_error (parser
, "expected identifier");
5597 expr
.value
= error_mark_node
;
5598 expr
.original_code
= ERROR_MARK
;
5601 c_parser_consume_token (parser
);
5602 expr
.value
= build_component_ref (expr
.value
, ident
);
5603 expr
.original_code
= ERROR_MARK
;
5606 /* Structure element reference. */
5607 c_parser_consume_token (parser
);
5608 expr
= default_function_array_conversion (expr
);
5609 if (c_parser_next_token_is (parser
, CPP_NAME
))
5610 ident
= c_parser_peek_token (parser
)->value
;
5613 c_parser_error (parser
, "expected identifier");
5614 expr
.value
= error_mark_node
;
5615 expr
.original_code
= ERROR_MARK
;
5618 c_parser_consume_token (parser
);
5619 expr
.value
= build_component_ref (build_indirect_ref (loc
,
5623 expr
.original_code
= ERROR_MARK
;
5626 /* Postincrement. */
5627 c_parser_consume_token (parser
);
5628 expr
= default_function_array_conversion (expr
);
5629 expr
.value
= build_unary_op (loc
,
5630 POSTINCREMENT_EXPR
, expr
.value
, 0);
5631 expr
.original_code
= ERROR_MARK
;
5633 case CPP_MINUS_MINUS
:
5634 /* Postdecrement. */
5635 c_parser_consume_token (parser
);
5636 expr
= default_function_array_conversion (expr
);
5637 expr
.value
= build_unary_op (loc
,
5638 POSTDECREMENT_EXPR
, expr
.value
, 0);
5639 expr
.original_code
= ERROR_MARK
;
5647 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5650 assignment-expression
5651 expression , assignment-expression
5654 static struct c_expr
5655 c_parser_expression (c_parser
*parser
)
5658 expr
= c_parser_expr_no_commas (parser
, NULL
);
5659 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5662 c_parser_consume_token (parser
);
5663 next
= c_parser_expr_no_commas (parser
, NULL
);
5664 next
= default_function_array_conversion (next
);
5665 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5666 expr
.original_code
= COMPOUND_EXPR
;
5671 /* Parse an expression and convert functions or arrays to
5674 static struct c_expr
5675 c_parser_expression_conv (c_parser
*parser
)
5678 expr
= c_parser_expression (parser
);
5679 expr
= default_function_array_conversion (expr
);
5683 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5684 functions and arrays to pointers.
5687 assignment-expression
5688 nonempty-expr-list , assignment-expression
5692 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5696 expr
= c_parser_expr_no_commas (parser
, NULL
);
5698 expr
= default_function_array_conversion (expr
);
5699 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5700 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5702 c_parser_consume_token (parser
);
5703 expr
= c_parser_expr_no_commas (parser
, NULL
);
5705 expr
= default_function_array_conversion (expr
);
5706 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5712 /* Parse Objective-C-specific constructs. */
5714 /* Parse an objc-class-definition.
5716 objc-class-definition:
5717 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5718 objc-class-instance-variables[opt] objc-methodprotolist @end
5719 @implementation identifier objc-superclass[opt]
5720 objc-class-instance-variables[opt]
5721 @interface identifier ( identifier ) objc-protocol-refs[opt]
5722 objc-methodprotolist @end
5723 @implementation identifier ( identifier )
5728 "@interface identifier (" must start "@interface identifier (
5729 identifier ) ...": objc-methodprotolist in the first production may
5730 not start with a parenthesized identifier as a declarator of a data
5731 definition with no declaration specifiers if the objc-superclass,
5732 objc-protocol-refs and objc-class-instance-variables are omitted. */
5735 c_parser_objc_class_definition (c_parser
*parser
)
5740 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5742 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5746 c_parser_consume_token (parser
);
5747 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5749 c_parser_error (parser
, "expected identifier");
5752 id1
= c_parser_peek_token (parser
)->value
;
5753 c_parser_consume_token (parser
);
5754 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5757 tree proto
= NULL_TREE
;
5758 c_parser_consume_token (parser
);
5759 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5761 c_parser_error (parser
, "expected identifier");
5762 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5765 id2
= c_parser_peek_token (parser
)->value
;
5766 c_parser_consume_token (parser
);
5767 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5770 objc_start_category_implementation (id1
, id2
);
5773 if (c_parser_next_token_is (parser
, CPP_LESS
))
5774 proto
= c_parser_objc_protocol_refs (parser
);
5775 objc_start_category_interface (id1
, id2
, proto
);
5776 c_parser_objc_methodprotolist (parser
);
5777 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5778 objc_finish_interface ();
5781 if (c_parser_next_token_is (parser
, CPP_COLON
))
5783 c_parser_consume_token (parser
);
5784 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5786 c_parser_error (parser
, "expected identifier");
5789 superclass
= c_parser_peek_token (parser
)->value
;
5790 c_parser_consume_token (parser
);
5793 superclass
= NULL_TREE
;
5796 tree proto
= NULL_TREE
;
5797 if (c_parser_next_token_is (parser
, CPP_LESS
))
5798 proto
= c_parser_objc_protocol_refs (parser
);
5799 objc_start_class_interface (id1
, superclass
, proto
);
5802 objc_start_class_implementation (id1
, superclass
);
5803 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5804 c_parser_objc_class_instance_variables (parser
);
5807 objc_continue_interface ();
5808 c_parser_objc_methodprotolist (parser
);
5809 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5810 objc_finish_interface ();
5814 objc_continue_implementation ();
5819 /* Parse objc-class-instance-variables.
5821 objc-class-instance-variables:
5822 { objc-instance-variable-decl-list[opt] }
5824 objc-instance-variable-decl-list:
5825 objc-visibility-spec
5826 objc-instance-variable-decl ;
5828 objc-instance-variable-decl-list objc-visibility-spec
5829 objc-instance-variable-decl-list objc-instance-variable-decl ;
5830 objc-instance-variable-decl-list ;
5832 objc-visibility-spec:
5837 objc-instance-variable-decl:
5842 c_parser_objc_class_instance_variables (c_parser
*parser
)
5844 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5845 c_parser_consume_token (parser
);
5846 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5849 /* Parse any stray semicolon. */
5850 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5852 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
5853 "extra semicolon in struct or union specified");
5854 c_parser_consume_token (parser
);
5857 /* Stop if at the end of the instance variables. */
5858 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5860 c_parser_consume_token (parser
);
5863 /* Parse any objc-visibility-spec. */
5864 if (c_parser_next_token_is_keyword (parser
, RID_PRIVATE
))
5866 c_parser_consume_token (parser
);
5867 objc_set_visibility (2);
5870 else if (c_parser_next_token_is_keyword (parser
, RID_PROTECTED
))
5872 c_parser_consume_token (parser
);
5873 objc_set_visibility (0);
5876 else if (c_parser_next_token_is_keyword (parser
, RID_PUBLIC
))
5878 c_parser_consume_token (parser
);
5879 objc_set_visibility (1);
5882 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5884 c_parser_pragma (parser
, pragma_external
);
5888 /* Parse some comma-separated declarations. */
5889 decls
= c_parser_struct_declaration (parser
);
5891 /* Comma-separated instance variables are chained together in
5892 reverse order; add them one by one. */
5893 tree ivar
= nreverse (decls
);
5894 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5895 objc_add_instance_variable (copy_node (ivar
));
5897 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5901 /* Parse an objc-class-declaration.
5903 objc-class-declaration:
5904 @class identifier-list ;
5908 c_parser_objc_class_declaration (c_parser
*parser
)
5910 tree list
= NULL_TREE
;
5911 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_CLASS
));
5912 c_parser_consume_token (parser
);
5913 /* Any identifiers, including those declared as type names, are OK
5918 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5920 c_parser_error (parser
, "expected identifier");
5923 id
= c_parser_peek_token (parser
)->value
;
5924 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5925 c_parser_consume_token (parser
);
5926 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5927 c_parser_consume_token (parser
);
5931 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5932 objc_declare_class (list
);
5935 /* Parse an objc-alias-declaration.
5937 objc-alias-declaration:
5938 @compatibility_alias identifier identifier ;
5942 c_parser_objc_alias_declaration (c_parser
*parser
)
5945 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5946 c_parser_consume_token (parser
);
5947 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5949 c_parser_error (parser
, "expected identifier");
5950 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5953 id1
= c_parser_peek_token (parser
)->value
;
5954 c_parser_consume_token (parser
);
5955 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5957 c_parser_error (parser
, "expected identifier");
5958 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5961 id2
= c_parser_peek_token (parser
)->value
;
5962 c_parser_consume_token (parser
);
5963 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5964 objc_declare_alias (id1
, id2
);
5967 /* Parse an objc-protocol-definition.
5969 objc-protocol-definition:
5970 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5971 @protocol identifier-list ;
5973 "@protocol identifier ;" should be resolved as "@protocol
5974 identifier-list ;": objc-methodprotolist may not start with a
5975 semicolon in the first alternative if objc-protocol-refs are
5979 c_parser_objc_protocol_definition (c_parser
*parser
)
5981 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5982 c_parser_consume_token (parser
);
5983 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5985 c_parser_error (parser
, "expected identifier");
5988 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5989 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5991 tree list
= NULL_TREE
;
5992 /* Any identifiers, including those declared as type names, are
5997 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5999 c_parser_error (parser
, "expected identifier");
6002 id
= c_parser_peek_token (parser
)->value
;
6003 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6004 c_parser_consume_token (parser
);
6005 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6006 c_parser_consume_token (parser
);
6010 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6011 objc_declare_protocols (list
);
6015 tree id
= c_parser_peek_token (parser
)->value
;
6016 tree proto
= NULL_TREE
;
6017 c_parser_consume_token (parser
);
6018 if (c_parser_next_token_is (parser
, CPP_LESS
))
6019 proto
= c_parser_objc_protocol_refs (parser
);
6020 parser
->objc_pq_context
= true;
6021 objc_start_protocol (id
, proto
);
6022 c_parser_objc_methodprotolist (parser
);
6023 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
6024 parser
->objc_pq_context
= false;
6025 objc_finish_interface ();
6029 /* Parse an objc-method-type.
6036 static enum tree_code
6037 c_parser_objc_method_type (c_parser
*parser
)
6039 switch (c_parser_peek_token (parser
)->type
)
6042 c_parser_consume_token (parser
);
6045 c_parser_consume_token (parser
);
6052 /* Parse an objc-method-definition.
6054 objc-method-definition:
6055 objc-method-type objc-method-decl ;[opt] compound-statement
6059 c_parser_objc_method_definition (c_parser
*parser
)
6061 enum tree_code type
= c_parser_objc_method_type (parser
);
6063 objc_set_method_type (type
);
6064 parser
->objc_pq_context
= true;
6065 decl
= c_parser_objc_method_decl (parser
);
6066 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
6068 c_parser_consume_token (parser
);
6069 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6070 "extra semicolon in method definition specified");
6072 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
6074 c_parser_error (parser
, "expected %<{%>");
6077 parser
->objc_pq_context
= false;
6078 objc_start_method_definition (decl
);
6079 add_stmt (c_parser_compound_statement (parser
));
6080 objc_finish_method_definition (current_function_decl
);
6083 /* Parse an objc-methodprotolist.
6085 objc-methodprotolist:
6087 objc-methodprotolist objc-methodproto
6088 objc-methodprotolist declaration
6089 objc-methodprotolist ;
6091 The declaration is a data definition, which may be missing
6092 declaration specifiers under the same rules and diagnostics as
6093 other data definitions outside functions, and the stray semicolon
6094 is diagnosed the same way as a stray semicolon outside a
6098 c_parser_objc_methodprotolist (c_parser
*parser
)
6102 /* The list is terminated by @end. */
6103 switch (c_parser_peek_token (parser
)->type
)
6106 pedwarn (c_parser_peek_token (parser
)->location
, OPT_pedantic
,
6107 "ISO C does not allow extra %<;%> outside of a function");
6108 c_parser_consume_token (parser
);
6112 c_parser_objc_methodproto (parser
);
6115 c_parser_pragma (parser
, pragma_external
);
6120 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6122 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6128 /* Parse an objc-methodproto.
6131 objc-method-type objc-method-decl ;
6135 c_parser_objc_methodproto (c_parser
*parser
)
6137 enum tree_code type
= c_parser_objc_method_type (parser
);
6139 objc_set_method_type (type
);
6140 /* Remember protocol qualifiers in prototypes. */
6141 parser
->objc_pq_context
= true;
6142 decl
= c_parser_objc_method_decl (parser
);
6143 /* Forget protocol qualifiers here. */
6144 parser
->objc_pq_context
= false;
6145 objc_add_method_declaration (decl
);
6146 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6149 /* Parse an objc-method-decl.
6152 ( objc-type-name ) objc-selector
6154 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6155 objc-keyword-selector objc-optparmlist
6157 objc-keyword-selector:
6159 objc-keyword-selector objc-keyword-decl
6162 objc-selector : ( objc-type-name ) identifier
6163 objc-selector : identifier
6164 : ( objc-type-name ) identifier
6168 objc-optparms objc-optellipsis
6172 objc-opt-parms , parameter-declaration
6180 c_parser_objc_method_decl (c_parser
*parser
)
6182 tree type
= NULL_TREE
;
6184 tree parms
= NULL_TREE
;
6185 bool ellipsis
= false;
6187 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6189 c_parser_consume_token (parser
);
6190 type
= c_parser_objc_type_name (parser
);
6191 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6193 sel
= c_parser_objc_selector (parser
);
6194 /* If there is no selector, or a colon follows, we have an
6195 objc-keyword-selector. If there is a selector, and a colon does
6196 not follow, that selector ends the objc-method-decl. */
6197 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6200 tree list
= NULL_TREE
;
6203 tree atype
= NULL_TREE
, id
, keyworddecl
;
6204 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6206 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6208 c_parser_consume_token (parser
);
6209 atype
= c_parser_objc_type_name (parser
);
6210 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6213 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6215 c_parser_error (parser
, "expected identifier");
6216 return error_mark_node
;
6218 id
= c_parser_peek_token (parser
)->value
;
6219 c_parser_consume_token (parser
);
6220 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6221 list
= chainon (list
, keyworddecl
);
6222 tsel
= c_parser_objc_selector (parser
);
6223 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6226 /* Parse the optional parameter list. Optional Objective-C
6227 method parameters follow the C syntax, and may include '...'
6228 to denote a variable number of arguments. */
6229 parms
= make_node (TREE_LIST
);
6230 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6232 struct c_parm
*parm
;
6233 c_parser_consume_token (parser
);
6234 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6237 c_parser_consume_token (parser
);
6240 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6243 parms
= chainon (parms
,
6244 build_tree_list (NULL_TREE
, grokparm (parm
)));
6248 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6251 /* Parse an objc-type-name.
6254 objc-type-qualifiers[opt] type-name
6255 objc-type-qualifiers[opt]
6257 objc-type-qualifiers:
6259 objc-type-qualifiers objc-type-qualifier
6261 objc-type-qualifier: one of
6262 in out inout bycopy byref oneway
6266 c_parser_objc_type_name (c_parser
*parser
)
6268 tree quals
= NULL_TREE
;
6269 struct c_type_name
*type_name
= NULL
;
6270 tree type
= NULL_TREE
;
6273 c_token
*token
= c_parser_peek_token (parser
);
6274 if (token
->type
== CPP_KEYWORD
6275 && (token
->keyword
== RID_IN
6276 || token
->keyword
== RID_OUT
6277 || token
->keyword
== RID_INOUT
6278 || token
->keyword
== RID_BYCOPY
6279 || token
->keyword
== RID_BYREF
6280 || token
->keyword
== RID_ONEWAY
))
6282 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6283 c_parser_consume_token (parser
);
6288 if (c_parser_next_token_starts_typename (parser
))
6289 type_name
= c_parser_type_name (parser
);
6291 type
= groktypename (type_name
);
6292 return build_tree_list (quals
, type
);
6295 /* Parse objc-protocol-refs.
6302 c_parser_objc_protocol_refs (c_parser
*parser
)
6304 tree list
= NULL_TREE
;
6305 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6306 c_parser_consume_token (parser
);
6307 /* Any identifiers, including those declared as type names, are OK
6312 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6314 c_parser_error (parser
, "expected identifier");
6317 id
= c_parser_peek_token (parser
)->value
;
6318 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6319 c_parser_consume_token (parser
);
6320 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6321 c_parser_consume_token (parser
);
6325 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6329 /* Parse an objc-try-catch-statement.
6331 objc-try-catch-statement:
6332 @try compound-statement objc-catch-list[opt]
6333 @try compound-statement objc-catch-list[opt] @finally compound-statement
6336 @catch ( parameter-declaration ) compound-statement
6337 objc-catch-list @catch ( parameter-declaration ) compound-statement
6341 c_parser_objc_try_catch_statement (c_parser
*parser
)
6345 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TRY
));
6346 c_parser_consume_token (parser
);
6347 loc
= c_parser_peek_token (parser
)->location
;
6348 stmt
= c_parser_compound_statement (parser
);
6349 objc_begin_try_stmt (loc
, stmt
);
6350 while (c_parser_next_token_is_keyword (parser
, RID_CATCH
))
6352 struct c_parm
*parm
;
6353 c_parser_consume_token (parser
);
6354 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6356 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6359 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6362 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6363 objc_begin_catch_clause (grokparm (parm
));
6364 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6365 c_parser_compound_statement_nostart (parser
);
6366 objc_finish_catch_clause ();
6368 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6372 c_parser_consume_token (parser
);
6373 finloc
= c_parser_peek_token (parser
)->location
;
6374 finstmt
= c_parser_compound_statement (parser
);
6375 objc_build_finally_clause (finloc
, finstmt
);
6377 objc_finish_try_stmt ();
6380 /* Parse an objc-synchronized-statement.
6382 objc-synchronized-statement:
6383 @synchronized ( expression ) compound-statement
6387 c_parser_objc_synchronized_statement (c_parser
*parser
)
6391 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6392 c_parser_consume_token (parser
);
6393 loc
= c_parser_peek_token (parser
)->location
;
6394 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6396 expr
= c_parser_expression (parser
).value
;
6397 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6400 expr
= error_mark_node
;
6401 stmt
= c_parser_compound_statement (parser
);
6402 objc_build_synchronized (loc
, expr
, stmt
);
6405 /* Parse an objc-selector; return NULL_TREE without an error if the
6406 next token is not an objc-selector.
6411 enum struct union if else while do for switch case default
6412 break continue return goto asm sizeof typeof __alignof
6413 unsigned long const short volatile signed restrict _Complex
6414 in out inout bycopy byref oneway int char float double void _Bool
6416 ??? Why this selection of keywords but not, for example, storage
6417 class specifiers? */
6420 c_parser_objc_selector (c_parser
*parser
)
6422 c_token
*token
= c_parser_peek_token (parser
);
6423 tree value
= token
->value
;
6424 if (token
->type
== CPP_NAME
)
6426 c_parser_consume_token (parser
);
6429 if (token
->type
!= CPP_KEYWORD
)
6431 switch (token
->keyword
)
6472 c_parser_consume_token (parser
);
6479 /* Parse an objc-selector-arg.
6483 objc-keywordname-list
6485 objc-keywordname-list:
6487 objc-keywordname-list objc-keywordname
6495 c_parser_objc_selector_arg (c_parser
*parser
)
6497 tree sel
= c_parser_objc_selector (parser
);
6498 tree list
= NULL_TREE
;
6499 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6503 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6505 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6506 sel
= c_parser_objc_selector (parser
);
6507 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6513 /* Parse an objc-receiver.
6522 c_parser_objc_receiver (c_parser
*parser
)
6524 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6525 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6526 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6528 tree id
= c_parser_peek_token (parser
)->value
;
6529 c_parser_consume_token (parser
);
6530 return objc_get_class_reference (id
);
6532 return c_parser_expression (parser
).value
;
6535 /* Parse objc-message-args.
6539 objc-keywordarg-list
6541 objc-keywordarg-list:
6543 objc-keywordarg-list objc-keywordarg
6546 objc-selector : objc-keywordexpr
6551 c_parser_objc_message_args (c_parser
*parser
)
6553 tree sel
= c_parser_objc_selector (parser
);
6554 tree list
= NULL_TREE
;
6555 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6560 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6562 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6563 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6564 sel
= c_parser_objc_selector (parser
);
6565 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6571 /* Parse an objc-keywordexpr.
6578 c_parser_objc_keywordexpr (c_parser
*parser
)
6580 tree list
= c_parser_expr_list (parser
, true);
6581 if (TREE_CHAIN (list
) == NULL_TREE
)
6583 /* Just return the expression, remove a level of
6585 return TREE_VALUE (list
);
6589 /* We have a comma expression, we will collapse later. */
6595 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6596 should be considered, statements. ALLOW_STMT is true if we're within
6597 the context of a function and such pragmas are to be allowed. Returns
6598 true if we actually parsed such a pragma. */
6601 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6605 id
= c_parser_peek_token (parser
)->pragma_kind
;
6606 gcc_assert (id
!= PRAGMA_NONE
);
6610 case PRAGMA_OMP_BARRIER
:
6611 if (context
!= pragma_compound
)
6613 if (context
== pragma_stmt
)
6614 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6615 "used in compound statements");
6618 c_parser_omp_barrier (parser
);
6621 case PRAGMA_OMP_FLUSH
:
6622 if (context
!= pragma_compound
)
6624 if (context
== pragma_stmt
)
6625 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6626 "used in compound statements");
6629 c_parser_omp_flush (parser
);
6632 case PRAGMA_OMP_TASKWAIT
:
6633 if (context
!= pragma_compound
)
6635 if (context
== pragma_stmt
)
6636 c_parser_error (parser
, "%<#pragma omp taskwait%> may only be "
6637 "used in compound statements");
6640 c_parser_omp_taskwait (parser
);
6643 case PRAGMA_OMP_THREADPRIVATE
:
6644 c_parser_omp_threadprivate (parser
);
6647 case PRAGMA_OMP_SECTION
:
6648 error_at (c_parser_peek_token (parser
)->location
,
6649 "%<#pragma omp section%> may only be used in "
6650 "%<#pragma omp sections%> construct");
6651 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6654 case PRAGMA_GCC_PCH_PREPROCESS
:
6655 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6656 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6660 if (id
< PRAGMA_FIRST_EXTERNAL
)
6662 if (context
== pragma_external
)
6665 c_parser_error (parser
, "expected declaration specifiers");
6666 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6669 c_parser_omp_construct (parser
);
6675 c_parser_consume_pragma (parser
);
6676 c_invoke_pragma_handler (id
);
6678 /* Skip to EOL, but suppress any error message. Those will have been
6679 generated by the handler routine through calling error, as opposed
6680 to calling c_parser_error. */
6681 parser
->error
= true;
6682 c_parser_skip_to_pragma_eol (parser
);
6687 /* The interface the pragma parsers have to the lexer. */
6690 pragma_lex (tree
*value
)
6692 c_token
*tok
= c_parser_peek_token (the_parser
);
6693 enum cpp_ttype ret
= tok
->type
;
6695 *value
= tok
->value
;
6696 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6700 if (ret
== CPP_KEYWORD
)
6702 c_parser_consume_token (the_parser
);
6709 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6713 c_parser_consume_pragma (parser
);
6714 if (c_parser_next_token_is (parser
, CPP_STRING
))
6716 name
= c_parser_peek_token (parser
)->value
;
6717 c_parser_consume_token (parser
);
6720 c_parser_error (parser
, "expected string literal");
6721 c_parser_skip_to_pragma_eol (parser
);
6724 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6727 /* OpenMP 2.5 parsing routines. */
6729 /* Returns name of the next clause.
6730 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6731 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6732 returned and the token is consumed. */
6734 static pragma_omp_clause
6735 c_parser_omp_clause_name (c_parser
*parser
)
6737 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6739 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6740 result
= PRAGMA_OMP_CLAUSE_IF
;
6741 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6742 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6743 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6745 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6750 if (!strcmp ("collapse", p
))
6751 result
= PRAGMA_OMP_CLAUSE_COLLAPSE
;
6752 else if (!strcmp ("copyin", p
))
6753 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6754 else if (!strcmp ("copyprivate", p
))
6755 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6758 if (!strcmp ("firstprivate", p
))
6759 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6762 if (!strcmp ("lastprivate", p
))
6763 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6766 if (!strcmp ("nowait", p
))
6767 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6768 else if (!strcmp ("num_threads", p
))
6769 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6772 if (!strcmp ("ordered", p
))
6773 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6776 if (!strcmp ("private", p
))
6777 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6780 if (!strcmp ("reduction", p
))
6781 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6784 if (!strcmp ("schedule", p
))
6785 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6786 else if (!strcmp ("shared", p
))
6787 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6790 if (!strcmp ("untied", p
))
6791 result
= PRAGMA_OMP_CLAUSE_UNTIED
;
6796 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6797 c_parser_consume_token (parser
);
6802 /* Validate that a clause of the given type does not already exist. */
6805 check_no_duplicate_clause (tree clauses
, enum omp_clause_code code
,
6810 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6811 if (OMP_CLAUSE_CODE (c
) == code
)
6813 error ("too many %qs clauses", name
);
6821 variable-list , identifier
6823 If KIND is nonzero, create the appropriate node and install the decl
6824 in OMP_CLAUSE_DECL and add the node to the head of the list.
6826 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6827 return the list created. */
6830 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6833 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6834 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6835 c_parser_error (parser
, "expected identifier");
6837 while (c_parser_next_token_is (parser
, CPP_NAME
)
6838 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6840 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6843 undeclared_variable (c_parser_peek_token (parser
)->value
,
6844 c_parser_peek_token (parser
)->location
);
6845 else if (t
== error_mark_node
)
6849 tree u
= build_omp_clause (kind
);
6850 OMP_CLAUSE_DECL (u
) = t
;
6851 OMP_CLAUSE_CHAIN (u
) = list
;
6855 list
= tree_cons (t
, NULL_TREE
, list
);
6857 c_parser_consume_token (parser
);
6859 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6862 c_parser_consume_token (parser
);
6868 /* Similarly, but expect leading and trailing parenthesis. This is a very
6869 common case for omp clauses. */
6872 c_parser_omp_var_list_parens (c_parser
*parser
, enum omp_clause_code kind
,
6875 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6877 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6878 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6884 collapse ( constant-expression ) */
6887 c_parser_omp_clause_collapse (c_parser
*parser
, tree list
)
6889 tree c
, num
= error_mark_node
;
6893 check_no_duplicate_clause (list
, OMP_CLAUSE_COLLAPSE
, "collapse");
6895 loc
= c_parser_peek_token (parser
)->location
;
6896 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6898 num
= c_parser_expr_no_commas (parser
, NULL
).value
;
6899 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6901 if (num
== error_mark_node
)
6903 if (!INTEGRAL_TYPE_P (TREE_TYPE (num
))
6904 || !host_integerp (num
, 0)
6905 || (n
= tree_low_cst (num
, 0)) <= 0
6909 "collapse argument needs positive constant integer expression");
6912 c
= build_omp_clause (OMP_CLAUSE_COLLAPSE
);
6913 OMP_CLAUSE_COLLAPSE_EXPR (c
) = num
;
6914 OMP_CLAUSE_CHAIN (c
) = list
;
6919 copyin ( variable-list ) */
6922 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6924 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6928 copyprivate ( variable-list ) */
6931 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6933 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6937 default ( shared | none ) */
6940 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6942 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6945 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6947 if (c_parser_next_token_is (parser
, CPP_NAME
))
6949 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6954 if (strcmp ("none", p
) != 0)
6956 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6960 if (strcmp ("shared", p
) != 0)
6962 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6969 c_parser_consume_token (parser
);
6974 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6976 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6978 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6981 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6982 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6983 OMP_CLAUSE_CHAIN (c
) = list
;
6984 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6990 firstprivate ( variable-list ) */
6993 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6995 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6999 if ( expression ) */
7002 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
7004 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7006 tree t
= c_parser_paren_condition (parser
);
7009 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
7011 c
= build_omp_clause (OMP_CLAUSE_IF
);
7012 OMP_CLAUSE_IF_EXPR (c
) = t
;
7013 OMP_CLAUSE_CHAIN (c
) = list
;
7017 c_parser_error (parser
, "expected %<(%>");
7023 lastprivate ( variable-list ) */
7026 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
7028 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
7035 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7039 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
7041 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
7042 OMP_CLAUSE_CHAIN (c
) = list
;
7047 num_threads ( expression ) */
7050 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
7052 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7054 location_t expr_loc
= c_parser_peek_token (parser
)->location
;
7055 tree c
, t
= c_parser_expression (parser
).value
;
7057 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7059 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
7061 c_parser_error (parser
, "expected integer expression");
7065 /* Attempt to statically determine when the number isn't positive. */
7066 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
7067 build_int_cst (TREE_TYPE (t
), 0));
7068 if (c
== boolean_true_node
)
7070 warning_at (expr_loc
, 0,
7071 "%<num_threads%> value must be positive");
7072 t
= integer_one_node
;
7075 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
7077 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
7078 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
7079 OMP_CLAUSE_CHAIN (c
) = list
;
7090 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7094 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
7096 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
7097 OMP_CLAUSE_CHAIN (c
) = list
;
7102 private ( variable-list ) */
7105 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
7107 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
7111 reduction ( reduction-operator : variable-list )
7114 One of: + * - & ^ | && || */
7117 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
7119 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7121 enum tree_code code
;
7123 switch (c_parser_peek_token (parser
)->type
)
7135 code
= BIT_AND_EXPR
;
7138 code
= BIT_XOR_EXPR
;
7141 code
= BIT_IOR_EXPR
;
7144 code
= TRUTH_ANDIF_EXPR
;
7147 code
= TRUTH_ORIF_EXPR
;
7150 c_parser_error (parser
,
7151 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7152 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7153 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7156 c_parser_consume_token (parser
);
7157 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7161 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7162 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7163 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7167 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7173 schedule ( schedule-kind )
7174 schedule ( schedule-kind , expression )
7177 static | dynamic | guided | runtime | auto
7181 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7185 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7188 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7190 if (c_parser_next_token_is (parser
, CPP_NAME
))
7192 tree kind
= c_parser_peek_token (parser
)->value
;
7193 const char *p
= IDENTIFIER_POINTER (kind
);
7198 if (strcmp ("dynamic", p
) != 0)
7200 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7204 if (strcmp ("guided", p
) != 0)
7206 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7210 if (strcmp ("runtime", p
) != 0)
7212 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7219 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7220 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7221 else if (c_parser_next_token_is_keyword (parser
, RID_AUTO
))
7222 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_AUTO
;
7226 c_parser_consume_token (parser
);
7227 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7230 c_parser_consume_token (parser
);
7232 here
= c_parser_peek_token (parser
)->location
;
7233 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7235 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7236 error_at (here
, "schedule %<runtime%> does not take "
7237 "a %<chunk_size%> parameter");
7238 else if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_AUTO
)
7240 "schedule %<auto%> does not take "
7241 "a %<chunk_size%> parameter");
7242 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7243 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7245 c_parser_error (parser
, "expected integer expression");
7247 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7250 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7251 "expected %<,%> or %<)%>");
7253 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7254 OMP_CLAUSE_CHAIN (c
) = list
;
7258 c_parser_error (parser
, "invalid schedule kind");
7259 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7264 shared ( variable-list ) */
7267 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7269 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7276 c_parser_omp_clause_untied (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
7280 /* FIXME: Should we allow duplicates? */
7281 check_no_duplicate_clause (list
, OMP_CLAUSE_UNTIED
, "untied");
7283 c
= build_omp_clause (OMP_CLAUSE_UNTIED
);
7284 OMP_CLAUSE_CHAIN (c
) = list
;
7288 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7289 is a bitmask in MASK. Return the list of clauses found; the result
7290 of clause default goes in *pdefault. */
7293 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7296 tree clauses
= NULL
;
7299 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7302 pragma_omp_clause c_kind
;
7304 tree prev
= clauses
;
7306 if (!first
&& c_parser_next_token_is (parser
, CPP_COMMA
))
7307 c_parser_consume_token (parser
);
7310 here
= c_parser_peek_token (parser
)->location
;
7311 c_kind
= c_parser_omp_clause_name (parser
);
7315 case PRAGMA_OMP_CLAUSE_COLLAPSE
:
7316 clauses
= c_parser_omp_clause_collapse (parser
, clauses
);
7317 c_name
= "collapse";
7319 case PRAGMA_OMP_CLAUSE_COPYIN
:
7320 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7323 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7324 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7325 c_name
= "copyprivate";
7327 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7328 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7331 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7332 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7333 c_name
= "firstprivate";
7335 case PRAGMA_OMP_CLAUSE_IF
:
7336 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7339 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7340 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7341 c_name
= "lastprivate";
7343 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7344 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7347 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7348 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7349 c_name
= "num_threads";
7351 case PRAGMA_OMP_CLAUSE_ORDERED
:
7352 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7355 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7356 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7359 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7360 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7361 c_name
= "reduction";
7363 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7364 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7365 c_name
= "schedule";
7367 case PRAGMA_OMP_CLAUSE_SHARED
:
7368 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7371 case PRAGMA_OMP_CLAUSE_UNTIED
:
7372 clauses
= c_parser_omp_clause_untied (parser
, clauses
);
7376 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7380 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7382 /* Remove the invalid clause(s) from the list to avoid
7383 confusing the rest of the compiler. */
7385 error_at (here
, "%qs is not valid for %qs", c_name
, where
);
7390 c_parser_skip_to_pragma_eol (parser
);
7392 return c_finish_omp_clauses (clauses
);
7399 In practice, we're also interested in adding the statement to an
7400 outer node. So it is convenient if we work around the fact that
7401 c_parser_statement calls add_stmt. */
7404 c_parser_omp_structured_block (c_parser
*parser
)
7406 tree stmt
= push_stmt_list ();
7407 c_parser_statement (parser
);
7408 return pop_stmt_list (stmt
);
7412 # pragma omp atomic new-line
7416 x binop= expr | x++ | ++x | x-- | --x
7418 +, *, -, /, &, ^, |, <<, >>
7420 where x is an lvalue expression with scalar type. */
7423 c_parser_omp_atomic (c_parser
*parser
)
7427 enum tree_code code
;
7428 struct c_expr rhs_expr
;
7430 c_parser_skip_to_pragma_eol (parser
);
7432 lhs
= c_parser_unary_expression (parser
).value
;
7433 switch (TREE_CODE (lhs
))
7437 c_parser_skip_to_end_of_block_or_statement (parser
);
7440 case PREINCREMENT_EXPR
:
7441 case POSTINCREMENT_EXPR
:
7442 lhs
= TREE_OPERAND (lhs
, 0);
7444 rhs
= integer_one_node
;
7447 case PREDECREMENT_EXPR
:
7448 case POSTDECREMENT_EXPR
:
7449 lhs
= TREE_OPERAND (lhs
, 0);
7451 rhs
= integer_one_node
;
7455 switch (c_parser_peek_token (parser
)->type
)
7461 code
= TRUNC_DIV_EXPR
;
7476 code
= BIT_AND_EXPR
;
7479 code
= BIT_IOR_EXPR
;
7482 code
= BIT_XOR_EXPR
;
7485 c_parser_error (parser
,
7486 "invalid operator for %<#pragma omp atomic%>");
7490 c_parser_consume_token (parser
);
7491 rhs_expr
= c_parser_expression (parser
);
7492 rhs_expr
= default_function_array_conversion (rhs_expr
);
7493 rhs
= rhs_expr
.value
;
7496 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7497 if (stmt
!= error_mark_node
)
7499 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7504 # pragma omp barrier new-line
7508 c_parser_omp_barrier (c_parser
*parser
)
7510 c_parser_consume_pragma (parser
);
7511 c_parser_skip_to_pragma_eol (parser
);
7513 c_finish_omp_barrier ();
7517 # pragma omp critical [(name)] new-line
7522 c_parser_omp_critical (c_parser
*parser
)
7524 tree stmt
, name
= NULL
;
7526 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7528 c_parser_consume_token (parser
);
7529 if (c_parser_next_token_is (parser
, CPP_NAME
))
7531 name
= c_parser_peek_token (parser
)->value
;
7532 c_parser_consume_token (parser
);
7533 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7536 c_parser_error (parser
, "expected identifier");
7538 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7539 c_parser_error (parser
, "expected %<(%> or end of line");
7540 c_parser_skip_to_pragma_eol (parser
);
7542 stmt
= c_parser_omp_structured_block (parser
);
7543 return c_finish_omp_critical (stmt
, name
);
7547 # pragma omp flush flush-vars[opt] new-line
7550 ( variable-list ) */
7553 c_parser_omp_flush (c_parser
*parser
)
7555 c_parser_consume_pragma (parser
);
7556 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7557 c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
7558 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7559 c_parser_error (parser
, "expected %<(%> or end of line");
7560 c_parser_skip_to_pragma_eol (parser
);
7562 c_finish_omp_flush ();
7565 /* Parse the restricted form of the for statement allowed by OpenMP.
7566 The real trick here is to determine the loop control variable early
7567 so that we can push a new decl if necessary to make it private. */
7570 c_parser_omp_for_loop (c_parser
*parser
, tree clauses
, tree
*par_clauses
)
7572 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
, stmt
, cl
;
7573 tree declv
, condv
, incrv
, initv
, for_block
= NULL
, ret
= NULL
;
7575 bool fail
= false, open_brace_parsed
= false;
7576 int i
, collapse
= 1, nbraces
= 0;
7578 for (cl
= clauses
; cl
; cl
= OMP_CLAUSE_CHAIN (cl
))
7579 if (OMP_CLAUSE_CODE (cl
) == OMP_CLAUSE_COLLAPSE
)
7580 collapse
= tree_low_cst (OMP_CLAUSE_COLLAPSE_EXPR (cl
), 0);
7582 gcc_assert (collapse
>= 1);
7584 declv
= make_tree_vec (collapse
);
7585 initv
= make_tree_vec (collapse
);
7586 condv
= make_tree_vec (collapse
);
7587 incrv
= make_tree_vec (collapse
);
7589 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7591 c_parser_error (parser
, "for statement expected");
7594 loc
= c_parser_peek_token (parser
)->location
;
7595 c_parser_consume_token (parser
);
7597 for (i
= 0; i
< collapse
; i
++)
7601 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7604 /* Parse the initialization declaration or expression. */
7605 if (c_parser_next_token_starts_declspecs (parser
))
7609 = tree_cons (NULL
, c_begin_compound_stmt (true), for_block
);
7610 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7611 decl
= check_for_loop_decls ();
7614 if (DECL_INITIAL (decl
) == error_mark_node
)
7615 decl
= error_mark_node
;
7618 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7619 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7621 struct c_expr init_exp
;
7622 location_t init_loc
;
7624 decl
= c_parser_postfix_expression (parser
).value
;
7626 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7627 init_loc
= c_parser_peek_token (parser
)->location
;
7629 init_exp
= c_parser_expr_no_commas (parser
, NULL
);
7630 init_exp
= default_function_array_conversion (init_exp
);
7631 init
= build_modify_expr (init_loc
,
7632 decl
, NOP_EXPR
, init_exp
.value
);
7633 init
= c_process_expr_stmt (init
);
7635 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7640 c_parser_error (parser
,
7641 "expected iteration declaration or initialization");
7642 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7648 /* Parse the loop condition. */
7650 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7652 location_t cond_loc
= c_parser_peek_token (parser
)->location
;
7654 cond
= c_parser_expression_conv (parser
).value
;
7655 cond
= c_objc_common_truthvalue_conversion (cond_loc
, cond
);
7656 protected_set_expr_location (cond
, cond_loc
);
7658 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7660 /* Parse the increment expression. */
7662 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7664 location_t incr_loc
= c_parser_peek_token (parser
)->location
;
7666 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7667 protected_set_expr_location (incr
, incr_loc
);
7669 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7671 if (decl
== NULL
|| decl
== error_mark_node
|| init
== error_mark_node
)
7675 TREE_VEC_ELT (declv
, i
) = decl
;
7676 TREE_VEC_ELT (initv
, i
) = init
;
7677 TREE_VEC_ELT (condv
, i
) = cond
;
7678 TREE_VEC_ELT (incrv
, i
) = incr
;
7682 if (i
== collapse
- 1)
7685 /* FIXME: OpenMP 3.0 draft isn't very clear on what exactly is allowed
7686 in between the collapsed for loops to be still considered perfectly
7687 nested. Hopefully the final version clarifies this.
7688 For now handle (multiple) {'s and empty statements. */
7691 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7693 c_parser_consume_token (parser
);
7696 else if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
7698 c_parser_consume_token (parser
);
7702 && c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7703 c_parser_consume_token (parser
);
7706 c_parser_error (parser
, "not enough perfectly nested loops");
7709 open_brace_parsed
= true;
7719 nbraces
+= bracecount
;
7722 save_break
= c_break_label
;
7723 c_break_label
= size_one_node
;
7724 save_cont
= c_cont_label
;
7725 c_cont_label
= NULL_TREE
;
7726 body
= push_stmt_list ();
7728 if (open_brace_parsed
)
7730 stmt
= c_begin_compound_stmt (true);
7731 c_parser_compound_statement_nostart (parser
);
7732 add_stmt (c_end_compound_stmt (stmt
, true));
7735 add_stmt (c_parser_c99_block_statement (parser
));
7737 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7739 body
= pop_stmt_list (body
);
7740 c_break_label
= save_break
;
7741 c_cont_label
= save_cont
;
7745 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7747 c_parser_consume_token (parser
);
7750 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
7751 c_parser_consume_token (parser
);
7754 c_parser_error (parser
, "collapsed loops not perfectly nested");
7757 stmt
= c_begin_compound_stmt (true);
7759 c_parser_compound_statement_nostart (parser
);
7760 body
= c_end_compound_stmt (stmt
, true);
7767 /* Only bother calling c_finish_omp_for if we haven't already generated
7768 an error from the initialization parsing. */
7771 stmt
= c_finish_omp_for (loc
, declv
, initv
, condv
, incrv
, body
, NULL
);
7774 if (par_clauses
!= NULL
)
7777 for (c
= par_clauses
; *c
; )
7778 if (OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_FIRSTPRIVATE
7779 && OMP_CLAUSE_CODE (*c
) != OMP_CLAUSE_LASTPRIVATE
)
7780 c
= &OMP_CLAUSE_CHAIN (*c
);
7783 for (i
= 0; i
< collapse
; i
++)
7784 if (TREE_VEC_ELT (declv
, i
) == OMP_CLAUSE_DECL (*c
))
7787 c
= &OMP_CLAUSE_CHAIN (*c
);
7788 else if (OMP_CLAUSE_CODE (*c
) == OMP_CLAUSE_FIRSTPRIVATE
)
7791 "iteration variable %qD should not be firstprivate",
7792 OMP_CLAUSE_DECL (*c
));
7793 *c
= OMP_CLAUSE_CHAIN (*c
);
7797 /* Copy lastprivate (decl) clause to OMP_FOR_CLAUSES,
7798 change it to shared (decl) in
7799 OMP_PARALLEL_CLAUSES. */
7800 tree l
= build_omp_clause (OMP_CLAUSE_LASTPRIVATE
);
7801 OMP_CLAUSE_DECL (l
) = OMP_CLAUSE_DECL (*c
);
7802 OMP_CLAUSE_CHAIN (l
) = clauses
;
7804 OMP_CLAUSE_SET_CODE (*c
, OMP_CLAUSE_SHARED
);
7808 OMP_FOR_CLAUSES (stmt
) = clauses
;
7815 stmt
= c_end_compound_stmt (TREE_VALUE (for_block
), true);
7817 for_block
= TREE_CHAIN (for_block
);
7823 #pragma omp for for-clause[optseq] new-line
7827 #define OMP_FOR_CLAUSE_MASK \
7828 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7829 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7830 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7831 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7832 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7833 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7834 | (1u << PRAGMA_OMP_CLAUSE_COLLAPSE) \
7835 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7838 c_parser_omp_for (c_parser
*parser
)
7840 tree block
, clauses
, ret
;
7842 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7845 block
= c_begin_compound_stmt (true);
7846 ret
= c_parser_omp_for_loop (parser
, clauses
, NULL
);
7847 block
= c_end_compound_stmt (block
, true);
7854 # pragma omp master new-line
7859 c_parser_omp_master (c_parser
*parser
)
7861 c_parser_skip_to_pragma_eol (parser
);
7862 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7866 # pragma omp ordered new-line
7871 c_parser_omp_ordered (c_parser
*parser
)
7873 c_parser_skip_to_pragma_eol (parser
);
7874 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7880 { section-sequence }
7883 section-directive[opt] structured-block
7884 section-sequence section-directive structured-block */
7887 c_parser_omp_sections_scope (c_parser
*parser
)
7890 bool error_suppress
= false;
7893 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7895 /* Avoid skipping until the end of the block. */
7896 parser
->error
= false;
7900 stmt
= push_stmt_list ();
7902 loc
= c_parser_peek_token (parser
)->location
;
7903 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7905 substmt
= push_stmt_list ();
7909 c_parser_statement (parser
);
7911 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7913 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7915 if (c_parser_next_token_is (parser
, CPP_EOF
))
7919 substmt
= pop_stmt_list (substmt
);
7920 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7921 SET_EXPR_LOCATION (substmt
, loc
);
7927 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7929 if (c_parser_next_token_is (parser
, CPP_EOF
))
7932 loc
= c_parser_peek_token (parser
)->location
;
7933 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7935 c_parser_consume_pragma (parser
);
7936 c_parser_skip_to_pragma_eol (parser
);
7937 error_suppress
= false;
7939 else if (!error_suppress
)
7941 error_at (loc
, "expected %<#pragma omp section%> or %<}%>");
7942 error_suppress
= true;
7945 substmt
= c_parser_omp_structured_block (parser
);
7946 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7947 SET_EXPR_LOCATION (substmt
, loc
);
7950 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7951 "expected %<#pragma omp section%> or %<}%>");
7953 substmt
= pop_stmt_list (stmt
);
7955 stmt
= make_node (OMP_SECTIONS
);
7956 TREE_TYPE (stmt
) = void_type_node
;
7957 OMP_SECTIONS_BODY (stmt
) = substmt
;
7959 return add_stmt (stmt
);
7963 # pragma omp sections sections-clause[optseq] newline
7967 #define OMP_SECTIONS_CLAUSE_MASK \
7968 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7969 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7970 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7971 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7972 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7975 c_parser_omp_sections (c_parser
*parser
)
7977 tree block
, clauses
, ret
;
7979 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7980 "#pragma omp sections");
7982 block
= c_begin_compound_stmt (true);
7983 ret
= c_parser_omp_sections_scope (parser
);
7985 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7986 block
= c_end_compound_stmt (block
, true);
7993 # pragma parallel parallel-clause new-line
7994 # pragma parallel for parallel-for-clause new-line
7995 # pragma parallel sections parallel-sections-clause new-line
7998 #define OMP_PARALLEL_CLAUSE_MASK \
7999 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8000 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8001 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8002 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8003 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
8004 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
8005 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
8006 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
8009 c_parser_omp_parallel (c_parser
*parser
)
8011 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
8012 const char *p_name
= "#pragma omp parallel";
8013 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
8014 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
8016 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
8018 c_parser_consume_token (parser
);
8019 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
8020 p_name
= "#pragma omp parallel for";
8021 mask
|= OMP_FOR_CLAUSE_MASK
;
8022 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8024 else if (c_parser_next_token_is (parser
, CPP_NAME
))
8026 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
8027 if (strcmp (p
, "sections") == 0)
8029 c_parser_consume_token (parser
);
8030 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
8031 p_name
= "#pragma omp parallel sections";
8032 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
8033 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
8037 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
8041 case PRAGMA_OMP_PARALLEL
:
8042 block
= c_begin_omp_parallel ();
8043 c_parser_statement (parser
);
8044 stmt
= c_finish_omp_parallel (clauses
, block
);
8047 case PRAGMA_OMP_PARALLEL_FOR
:
8048 block
= c_begin_omp_parallel ();
8049 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8050 c_parser_omp_for_loop (parser
, ws_clause
, &par_clause
);
8051 stmt
= c_finish_omp_parallel (par_clause
, block
);
8052 OMP_PARALLEL_COMBINED (stmt
) = 1;
8055 case PRAGMA_OMP_PARALLEL_SECTIONS
:
8056 block
= c_begin_omp_parallel ();
8057 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
8058 stmt
= c_parser_omp_sections_scope (parser
);
8060 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
8061 stmt
= c_finish_omp_parallel (par_clause
, block
);
8062 OMP_PARALLEL_COMBINED (stmt
) = 1;
8073 # pragma omp single single-clause[optseq] new-line
8077 #define OMP_SINGLE_CLAUSE_MASK \
8078 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8079 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8080 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
8081 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
8084 c_parser_omp_single (c_parser
*parser
)
8086 tree stmt
= make_node (OMP_SINGLE
);
8087 TREE_TYPE (stmt
) = void_type_node
;
8089 OMP_SINGLE_CLAUSES (stmt
)
8090 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
8091 "#pragma omp single");
8092 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
8094 return add_stmt (stmt
);
8098 # pragma omp task task-clause[optseq] new-line
8101 #define OMP_TASK_CLAUSE_MASK \
8102 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
8103 | (1u << PRAGMA_OMP_CLAUSE_UNTIED) \
8104 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
8105 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
8106 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
8107 | (1u << PRAGMA_OMP_CLAUSE_SHARED))
8110 c_parser_omp_task (c_parser
*parser
)
8112 tree clauses
, block
;
8114 clauses
= c_parser_omp_all_clauses (parser
, OMP_TASK_CLAUSE_MASK
,
8115 "#pragma omp task");
8117 block
= c_begin_omp_task ();
8118 c_parser_statement (parser
);
8119 return c_finish_omp_task (clauses
, block
);
8123 # pragma omp taskwait new-line
8127 c_parser_omp_taskwait (c_parser
*parser
)
8129 c_parser_consume_pragma (parser
);
8130 c_parser_skip_to_pragma_eol (parser
);
8132 c_finish_omp_taskwait ();
8135 /* Main entry point to parsing most OpenMP pragmas. */
8138 c_parser_omp_construct (c_parser
*parser
)
8140 enum pragma_kind p_kind
;
8144 loc
= c_parser_peek_token (parser
)->location
;
8145 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
8146 c_parser_consume_pragma (parser
);
8148 /* For all constructs below except #pragma omp atomic
8149 MUST_NOT_THROW catch handlers are needed when exceptions
8151 if (p_kind
!= PRAGMA_OMP_ATOMIC
)
8152 c_maybe_initialize_eh ();
8156 case PRAGMA_OMP_ATOMIC
:
8157 c_parser_omp_atomic (parser
);
8159 case PRAGMA_OMP_CRITICAL
:
8160 stmt
= c_parser_omp_critical (parser
);
8162 case PRAGMA_OMP_FOR
:
8163 stmt
= c_parser_omp_for (parser
);
8165 case PRAGMA_OMP_MASTER
:
8166 stmt
= c_parser_omp_master (parser
);
8168 case PRAGMA_OMP_ORDERED
:
8169 stmt
= c_parser_omp_ordered (parser
);
8171 case PRAGMA_OMP_PARALLEL
:
8172 stmt
= c_parser_omp_parallel (parser
);
8174 case PRAGMA_OMP_SECTIONS
:
8175 stmt
= c_parser_omp_sections (parser
);
8177 case PRAGMA_OMP_SINGLE
:
8178 stmt
= c_parser_omp_single (parser
);
8180 case PRAGMA_OMP_TASK
:
8181 stmt
= c_parser_omp_task (parser
);
8188 SET_EXPR_LOCATION (stmt
, loc
);
8193 # pragma omp threadprivate (variable-list) */
8196 c_parser_omp_threadprivate (c_parser
*parser
)
8200 c_parser_consume_pragma (parser
);
8201 vars
= c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_ERROR
, NULL
);
8203 /* Mark every variable in VARS to be assigned thread local storage. */
8204 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
8206 tree v
= TREE_PURPOSE (t
);
8208 /* If V had already been marked threadprivate, it doesn't matter
8209 whether it had been used prior to this point. */
8210 if (TREE_CODE (v
) != VAR_DECL
)
8211 error ("%qD is not a variable", v
);
8212 else if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
8213 error ("%qE declared %<threadprivate%> after first use", v
);
8214 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
8215 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
8216 else if (TREE_TYPE (v
) == error_mark_node
)
8218 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
8219 error ("%<threadprivate%> %qE has incomplete type", v
);
8222 if (! DECL_THREAD_LOCAL_P (v
))
8224 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
8225 /* If rtl has been already set for this var, call
8226 make_decl_rtl once again, so that encode_section_info
8227 has a chance to look at the new decl flags. */
8228 if (DECL_RTL_SET_P (v
))
8231 C_DECL_THREADPRIVATE_P (v
) = 1;
8235 c_parser_skip_to_pragma_eol (parser
);
8239 /* Parse a single source file. */
8244 /* Use local storage to begin. If the first token is a pragma, parse it.
8245 If it is #pragma GCC pch_preprocess, then this will load a PCH file
8246 which will cause garbage collection. */
8249 memset (&tparser
, 0, sizeof tparser
);
8250 the_parser
= &tparser
;
8252 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
8253 c_parser_pragma_pch_preprocess (&tparser
);
8255 the_parser
= GGC_NEW (c_parser
);
8256 *the_parser
= tparser
;
8258 c_parser_translation_unit (the_parser
);
8262 #include "gt-c-parser.h"