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 Free Software Foundation, Inc.
5 Parser actions based on the old Bison parser; structure somewhat
6 influenced by and fragments based on the C++ parser.
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
26 Make sure all relevant comments, and all relevant code from all
27 actions, brought over from old parser. Verify exact correspondence
30 Add testcases covering every input symbol in every state in old and
33 Include full syntax for GNU C, including erroneous cases accepted
34 with error messages, in syntax productions in comments.
36 Make more diagnostics in the front end generally take an explicit
37 location rather than implicitly using input_location. */
41 #include "coretypes.h"
45 #include "langhooks.h"
61 /* Miscellaneous data and functions needed for the parser. */
65 /* Objective-C specific parser/lexer information. */
67 static int objc_pq_context
= 0;
69 /* The following flag is needed to contextualize Objective-C lexical
70 analysis. In some cases (e.g., 'int NSObject;'), it is undesirable
71 to bind an identifier to an Objective-C class, even if a class with
73 static int objc_need_raw_identifier
= 0;
74 #define OBJC_NEED_RAW_IDENTIFIER(VAL) \
76 if (c_dialect_objc ()) \
77 objc_need_raw_identifier = VAL; \
80 /* The reserved keyword table. */
84 ENUM_BITFIELD(rid
) rid
: 16;
85 unsigned int disable
: 16;
88 /* Disable mask. Keywords are disabled if (reswords[i].disable &
90 #define D_C89 0x01 /* not in C89 */
91 #define D_EXT 0x02 /* GCC extension */
92 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
93 #define D_OBJC 0x08 /* Objective C only */
95 static const struct resword reswords
[] =
97 { "_Bool", RID_BOOL
, 0 },
98 { "_Complex", RID_COMPLEX
, 0 },
99 { "_Decimal32", RID_DFLOAT32
, D_EXT
},
100 { "_Decimal64", RID_DFLOAT64
, D_EXT
},
101 { "_Decimal128", RID_DFLOAT128
, D_EXT
},
102 { "__FUNCTION__", RID_FUNCTION_NAME
, 0 },
103 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME
, 0 },
104 { "__alignof", RID_ALIGNOF
, 0 },
105 { "__alignof__", RID_ALIGNOF
, 0 },
106 { "__asm", RID_ASM
, 0 },
107 { "__asm__", RID_ASM
, 0 },
108 { "__attribute", RID_ATTRIBUTE
, 0 },
109 { "__attribute__", RID_ATTRIBUTE
, 0 },
110 { "__builtin_choose_expr", RID_CHOOSE_EXPR
, 0 },
111 { "__builtin_offsetof", RID_OFFSETOF
, 0 },
112 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P
, 0 },
113 { "__builtin_va_arg", RID_VA_ARG
, 0 },
114 { "__complex", RID_COMPLEX
, 0 },
115 { "__complex__", RID_COMPLEX
, 0 },
116 { "__const", RID_CONST
, 0 },
117 { "__const__", RID_CONST
, 0 },
118 { "__extension__", RID_EXTENSION
, 0 },
119 { "__func__", RID_C99_FUNCTION_NAME
, 0 },
120 { "__imag", RID_IMAGPART
, 0 },
121 { "__imag__", RID_IMAGPART
, 0 },
122 { "__inline", RID_INLINE
, 0 },
123 { "__inline__", RID_INLINE
, 0 },
124 { "__label__", RID_LABEL
, 0 },
125 { "__real", RID_REALPART
, 0 },
126 { "__real__", RID_REALPART
, 0 },
127 { "__restrict", RID_RESTRICT
, 0 },
128 { "__restrict__", RID_RESTRICT
, 0 },
129 { "__signed", RID_SIGNED
, 0 },
130 { "__signed__", RID_SIGNED
, 0 },
131 { "__thread", RID_THREAD
, 0 },
132 { "__typeof", RID_TYPEOF
, 0 },
133 { "__typeof__", RID_TYPEOF
, 0 },
134 { "__volatile", RID_VOLATILE
, 0 },
135 { "__volatile__", RID_VOLATILE
, 0 },
136 { "asm", RID_ASM
, D_EXT
},
137 { "auto", RID_AUTO
, 0 },
138 { "break", RID_BREAK
, 0 },
139 { "case", RID_CASE
, 0 },
140 { "char", RID_CHAR
, 0 },
141 { "const", RID_CONST
, 0 },
142 { "continue", RID_CONTINUE
, 0 },
143 { "default", RID_DEFAULT
, 0 },
145 { "double", RID_DOUBLE
, 0 },
146 { "else", RID_ELSE
, 0 },
147 { "enum", RID_ENUM
, 0 },
148 { "extern", RID_EXTERN
, 0 },
149 { "float", RID_FLOAT
, 0 },
150 { "for", RID_FOR
, 0 },
151 { "goto", RID_GOTO
, 0 },
153 { "inline", RID_INLINE
, D_EXT89
},
154 { "int", RID_INT
, 0 },
155 { "long", RID_LONG
, 0 },
156 { "register", RID_REGISTER
, 0 },
157 { "restrict", RID_RESTRICT
, D_C89
},
158 { "return", RID_RETURN
, 0 },
159 { "short", RID_SHORT
, 0 },
160 { "signed", RID_SIGNED
, 0 },
161 { "sizeof", RID_SIZEOF
, 0 },
162 { "static", RID_STATIC
, 0 },
163 { "struct", RID_STRUCT
, 0 },
164 { "switch", RID_SWITCH
, 0 },
165 { "typedef", RID_TYPEDEF
, 0 },
166 { "typeof", RID_TYPEOF
, D_EXT
},
167 { "union", RID_UNION
, 0 },
168 { "unsigned", RID_UNSIGNED
, 0 },
169 { "void", RID_VOID
, 0 },
170 { "volatile", RID_VOLATILE
, 0 },
171 { "while", RID_WHILE
, 0 },
172 /* These Objective-C keywords are recognized only immediately after
174 { "class", RID_AT_CLASS
, D_OBJC
},
175 { "compatibility_alias", RID_AT_ALIAS
, D_OBJC
},
176 { "defs", RID_AT_DEFS
, D_OBJC
},
177 { "encode", RID_AT_ENCODE
, D_OBJC
},
178 { "end", RID_AT_END
, D_OBJC
},
179 { "implementation", RID_AT_IMPLEMENTATION
, D_OBJC
},
180 { "interface", RID_AT_INTERFACE
, D_OBJC
},
181 { "private", RID_AT_PRIVATE
, D_OBJC
},
182 { "protected", RID_AT_PROTECTED
, D_OBJC
},
183 { "protocol", RID_AT_PROTOCOL
, D_OBJC
},
184 { "public", RID_AT_PUBLIC
, D_OBJC
},
185 { "selector", RID_AT_SELECTOR
, D_OBJC
},
186 { "throw", RID_AT_THROW
, D_OBJC
},
187 { "try", RID_AT_TRY
, D_OBJC
},
188 { "catch", RID_AT_CATCH
, D_OBJC
},
189 { "finally", RID_AT_FINALLY
, D_OBJC
},
190 { "synchronized", RID_AT_SYNCHRONIZED
, D_OBJC
},
191 /* These are recognized only in protocol-qualifier context
193 { "bycopy", RID_BYCOPY
, D_OBJC
},
194 { "byref", RID_BYREF
, D_OBJC
},
195 { "in", RID_IN
, D_OBJC
},
196 { "inout", RID_INOUT
, D_OBJC
},
197 { "oneway", RID_ONEWAY
, D_OBJC
},
198 { "out", RID_OUT
, D_OBJC
},
200 #define N_reswords (sizeof reswords / sizeof (struct resword))
202 /* All OpenMP clauses. OpenMP 2.5. */
203 typedef enum pragma_omp_clause
{
204 PRAGMA_OMP_CLAUSE_NONE
= 0,
206 PRAGMA_OMP_CLAUSE_COPYIN
,
207 PRAGMA_OMP_CLAUSE_COPYPRIVATE
,
208 PRAGMA_OMP_CLAUSE_DEFAULT
,
209 PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
,
210 PRAGMA_OMP_CLAUSE_IF
,
211 PRAGMA_OMP_CLAUSE_LASTPRIVATE
,
212 PRAGMA_OMP_CLAUSE_NOWAIT
,
213 PRAGMA_OMP_CLAUSE_NUM_THREADS
,
214 PRAGMA_OMP_CLAUSE_ORDERED
,
215 PRAGMA_OMP_CLAUSE_PRIVATE
,
216 PRAGMA_OMP_CLAUSE_REDUCTION
,
217 PRAGMA_OMP_CLAUSE_SCHEDULE
,
218 PRAGMA_OMP_CLAUSE_SHARED
222 /* Initialization routine for this file. */
227 /* The only initialization required is of the reserved word
231 int mask
= (flag_isoc99
? 0 : D_C89
)
232 | (flag_no_asm
? (flag_isoc99
? D_EXT
: D_EXT
|D_EXT89
) : 0);
234 if (!c_dialect_objc ())
237 ridpointers
= GGC_CNEWVEC (tree
, (int) RID_MAX
);
238 for (i
= 0; i
< N_reswords
; i
++)
240 /* If a keyword is disabled, do not enter it into the table
241 and so create a canonical spelling that isn't a keyword. */
242 if (reswords
[i
].disable
& mask
)
245 id
= get_identifier (reswords
[i
].word
);
246 C_RID_CODE (id
) = reswords
[i
].rid
;
247 C_IS_RESERVED_WORD (id
) = 1;
248 ridpointers
[(int) reswords
[i
].rid
] = id
;
252 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
253 and the C parser. Unlike the C++ lexer, the parser structure
254 stores the lexer information instead of using a separate structure.
255 Identifiers are separated into ordinary identifiers, type names,
256 keywords and some other Objective-C types of identifiers, and some
257 look-ahead is maintained.
259 ??? It might be a good idea to lex the whole file up front (as for
260 C++). It would then be possible to share more of the C and C++
261 lexer code, if desired. */
263 /* The following local token type is used. */
266 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
268 /* More information about the type of a CPP_NAME token. */
269 typedef enum c_id_kind
{
270 /* An ordinary identifier. */
272 /* An identifier declared as a typedef name. */
274 /* An identifier declared as an Objective-C class name. */
276 /* Not an identifier. */
280 /* A single C token after string literal concatenation and conversion
281 of preprocessing tokens to tokens. */
282 typedef struct c_token
GTY (())
284 /* The kind of token. */
285 ENUM_BITFIELD (cpp_ttype
) type
: 8;
286 /* If this token is a CPP_NAME, this value indicates whether also
287 declared as some kind of type. Otherwise, it is C_ID_NONE. */
288 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
289 /* If this token is a keyword, this value indicates which keyword.
290 Otherwise, this value is RID_MAX. */
291 ENUM_BITFIELD (rid
) keyword
: 8;
292 /* If this token is a CPP_PRAGMA, this indicates the pragma that
293 was seen. Otherwise it is PRAGMA_NONE. */
294 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 7;
295 /* True if this token is from a system header. */
296 BOOL_BITFIELD in_system_header
: 1;
297 /* The value associated with this token, if any. */
299 /* The location at which this token was found. */
303 /* A parser structure recording information about the state and
304 context of parsing. Includes lexer information with up to two
305 tokens of look-ahead; more are not needed for C. */
306 typedef struct c_parser
GTY(())
308 /* The look-ahead tokens. */
310 /* How many look-ahead tokens are available (0, 1 or 2). */
312 /* True if a syntax error is being recovered from; false otherwise.
313 c_parser_error sets this flag. It should clear this flag when
314 enough tokens have been consumed to recover from the error. */
315 BOOL_BITFIELD error
: 1;
316 /* True if we're processing a pragma, and shouldn't automatically
317 consume CPP_PRAGMA_EOL. */
318 BOOL_BITFIELD in_pragma
: 1;
322 /* The actual parser and external interface. ??? Does this need to be
323 garbage-collected? */
325 static GTY (()) c_parser
*the_parser
;
328 /* Read in and lex a single token, storing it in *TOKEN. */
331 c_lex_one_token (c_token
*token
)
333 timevar_push (TV_LEX
);
335 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
);
336 token
->id_kind
= C_ID_NONE
;
337 token
->keyword
= RID_MAX
;
338 token
->pragma_kind
= PRAGMA_NONE
;
339 token
->in_system_header
= in_system_header
;
347 int objc_force_identifier
= objc_need_raw_identifier
;
348 OBJC_NEED_RAW_IDENTIFIER (0);
350 if (C_IS_RESERVED_WORD (token
->value
))
352 enum rid rid_code
= C_RID_CODE (token
->value
);
354 if (c_dialect_objc ())
356 if (!OBJC_IS_AT_KEYWORD (rid_code
)
357 && (!OBJC_IS_PQ_KEYWORD (rid_code
) || objc_pq_context
))
359 /* Return the canonical spelling for this keyword. */
360 token
->value
= ridpointers
[(int) rid_code
];
361 token
->type
= CPP_KEYWORD
;
362 token
->keyword
= rid_code
;
368 /* Return the canonical spelling for this keyword. */
369 token
->value
= ridpointers
[(int) rid_code
];
370 token
->type
= CPP_KEYWORD
;
371 token
->keyword
= rid_code
;
376 decl
= lookup_name (token
->value
);
379 if (TREE_CODE (decl
) == TYPE_DECL
)
381 token
->id_kind
= C_ID_TYPENAME
;
385 else if (c_dialect_objc ())
387 tree objc_interface_decl
= objc_is_class_name (token
->value
);
388 /* Objective-C class names are in the same namespace as
389 variables and typedefs, and hence are shadowed by local
391 if (objc_interface_decl
392 && (global_bindings_p ()
393 || (!objc_force_identifier
&& !decl
)))
395 token
->value
= objc_interface_decl
;
396 token
->id_kind
= C_ID_CLASSNAME
;
400 token
->id_kind
= C_ID_ID
;
404 /* This only happens in Objective-C; it must be a keyword. */
405 token
->type
= CPP_KEYWORD
;
406 token
->keyword
= C_RID_CODE (token
->value
);
410 case CPP_CLOSE_PAREN
:
412 /* These tokens may affect the interpretation of any identifiers
413 following, if doing Objective-C. */
414 OBJC_NEED_RAW_IDENTIFIER (0);
417 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
418 token
->pragma_kind
= TREE_INT_CST_LOW (token
->value
);
424 timevar_pop (TV_LEX
);
427 /* Return a pointer to the next token from PARSER, reading it in if
430 static inline c_token
*
431 c_parser_peek_token (c_parser
*parser
)
433 if (parser
->tokens_avail
== 0)
435 c_lex_one_token (&parser
->tokens
[0]);
436 parser
->tokens_avail
= 1;
438 return &parser
->tokens
[0];
441 /* Return true if the next token from PARSER has the indicated
445 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
447 return c_parser_peek_token (parser
)->type
== type
;
450 /* Return true if the next token from PARSER does not have the
454 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
456 return !c_parser_next_token_is (parser
, type
);
459 /* Return true if the next token from PARSER is the indicated
463 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
467 /* Peek at the next token. */
468 token
= c_parser_peek_token (parser
);
469 /* Check to see if it is the indicated keyword. */
470 return token
->keyword
== keyword
;
473 /* Return true if TOKEN can start a type name,
476 c_token_starts_typename (c_token
*token
)
481 switch (token
->id_kind
)
488 gcc_assert (c_dialect_objc ());
494 switch (token
->keyword
)
523 if (c_dialect_objc ())
531 /* Return true if the next token from PARSER can start a type name,
534 c_parser_next_token_starts_typename (c_parser
*parser
)
536 c_token
*token
= c_parser_peek_token (parser
);
537 return c_token_starts_typename (token
);
540 /* Return true if TOKEN can start declaration specifiers, false
543 c_token_starts_declspecs (c_token
*token
)
548 switch (token
->id_kind
)
555 gcc_assert (c_dialect_objc ());
561 switch (token
->keyword
)
597 if (c_dialect_objc ())
605 /* Return true if the next token from PARSER can start declaration
606 specifiers, false otherwise. */
608 c_parser_next_token_starts_declspecs (c_parser
*parser
)
610 c_token
*token
= c_parser_peek_token (parser
);
611 return c_token_starts_declspecs (token
);
614 /* Return a pointer to the next-but-one token from PARSER, reading it
615 in if necessary. The next token is already read in. */
618 c_parser_peek_2nd_token (c_parser
*parser
)
620 if (parser
->tokens_avail
>= 2)
621 return &parser
->tokens
[1];
622 gcc_assert (parser
->tokens_avail
== 1);
623 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
624 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
625 c_lex_one_token (&parser
->tokens
[1]);
626 parser
->tokens_avail
= 2;
627 return &parser
->tokens
[1];
630 /* Consume the next token from PARSER. */
633 c_parser_consume_token (c_parser
*parser
)
635 gcc_assert (parser
->tokens_avail
>= 1);
636 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
637 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
638 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
639 if (parser
->tokens_avail
== 2)
640 parser
->tokens
[0] = parser
->tokens
[1];
641 parser
->tokens_avail
--;
644 /* Expect the current token to be a #pragma. Consume it and remember
645 that we've begun parsing a pragma. */
648 c_parser_consume_pragma (c_parser
*parser
)
650 gcc_assert (!parser
->in_pragma
);
651 gcc_assert (parser
->tokens_avail
>= 1);
652 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
653 if (parser
->tokens_avail
== 2)
654 parser
->tokens
[0] = parser
->tokens
[1];
655 parser
->tokens_avail
--;
656 parser
->in_pragma
= true;
659 /* Update the globals input_location and in_system_header from
662 c_parser_set_source_position_from_token (c_token
*token
)
664 if (token
->type
!= CPP_EOF
)
666 input_location
= token
->location
;
667 in_system_header
= token
->in_system_header
;
671 /* Issue a diagnostic of the form
672 FILE:LINE: MESSAGE before TOKEN
673 where TOKEN is the next token in the input stream of PARSER.
674 MESSAGE (specified by the caller) is usually of the form "expected
677 Do not issue a diagnostic if still recovering from an error.
679 ??? This is taken from the C++ parser, but building up messages in
680 this way is not i18n-friendly and some other approach should be
684 c_parser_error (c_parser
*parser
, const char *gmsgid
)
686 c_token
*token
= c_parser_peek_token (parser
);
689 parser
->error
= true;
692 /* This diagnostic makes more sense if it is tagged to the line of
693 the token we just peeked at. */
694 c_parser_set_source_position_from_token (token
);
695 c_parse_error (gmsgid
,
696 /* Because c_parse_error does not understand
697 CPP_KEYWORD, keywords are treated like
699 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
703 /* If the next token is of the indicated TYPE, consume it. Otherwise,
704 issue the error MSGID. If MSGID is NULL then a message has already
705 been produced and no message will be produced this time. Returns
706 true if found, false otherwise. */
709 c_parser_require (c_parser
*parser
,
713 if (c_parser_next_token_is (parser
, type
))
715 c_parser_consume_token (parser
);
720 c_parser_error (parser
, msgid
);
725 /* If the next token is the indicated keyword, consume it. Otherwise,
726 issue the error MSGID. Returns true if found, false otherwise. */
729 c_parser_require_keyword (c_parser
*parser
,
733 if (c_parser_next_token_is_keyword (parser
, keyword
))
735 c_parser_consume_token (parser
);
740 c_parser_error (parser
, msgid
);
745 /* Like c_parser_require, except that tokens will be skipped until the
746 desired token is found. An error message is still produced if the
747 next token is not as expected. If MSGID is NULL then a message has
748 already been produced and no message will be produced this
752 c_parser_skip_until_found (c_parser
*parser
,
756 unsigned nesting_depth
= 0;
758 if (c_parser_require (parser
, type
, msgid
))
761 /* Skip tokens until the desired token is found. */
764 /* Peek at the next token. */
765 c_token
*token
= c_parser_peek_token (parser
);
766 /* If we've reached the token we want, consume it and stop. */
767 if (token
->type
== type
&& !nesting_depth
)
769 c_parser_consume_token (parser
);
773 /* If we've run out of tokens, stop. */
774 if (token
->type
== CPP_EOF
)
776 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
778 if (token
->type
== CPP_OPEN_BRACE
779 || token
->type
== CPP_OPEN_PAREN
780 || token
->type
== CPP_OPEN_SQUARE
)
782 else if (token
->type
== CPP_CLOSE_BRACE
783 || token
->type
== CPP_CLOSE_PAREN
784 || token
->type
== CPP_CLOSE_SQUARE
)
786 if (nesting_depth
-- == 0)
789 /* Consume this token. */
790 c_parser_consume_token (parser
);
792 parser
->error
= false;
795 /* Skip tokens until the end of a parameter is found, but do not
796 consume the comma, semicolon or closing delimiter. */
799 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
801 unsigned nesting_depth
= 0;
805 c_token
*token
= c_parser_peek_token (parser
);
806 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
809 /* If we've run out of tokens, stop. */
810 if (token
->type
== CPP_EOF
)
812 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
814 if (token
->type
== CPP_OPEN_BRACE
815 || token
->type
== CPP_OPEN_PAREN
816 || token
->type
== CPP_OPEN_SQUARE
)
818 else if (token
->type
== CPP_CLOSE_BRACE
819 || token
->type
== CPP_CLOSE_PAREN
820 || token
->type
== CPP_CLOSE_SQUARE
)
822 if (nesting_depth
-- == 0)
825 /* Consume this token. */
826 c_parser_consume_token (parser
);
828 parser
->error
= false;
831 /* Expect to be at the end of the pragma directive and consume an
832 end of line marker. */
835 c_parser_skip_to_pragma_eol (c_parser
*parser
)
837 gcc_assert (parser
->in_pragma
);
838 parser
->in_pragma
= false;
840 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
843 c_token
*token
= c_parser_peek_token (parser
);
844 if (token
->type
== CPP_EOF
)
846 if (token
->type
== CPP_PRAGMA_EOL
)
848 c_parser_consume_token (parser
);
851 c_parser_consume_token (parser
);
854 parser
->error
= false;
857 /* Skip tokens until we have consumed an entire block, or until we
858 have consumed a non-nested ';'. */
861 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
863 unsigned nesting_depth
= 0;
864 bool save_error
= parser
->error
;
870 /* Peek at the next token. */
871 token
= c_parser_peek_token (parser
);
879 if (parser
->in_pragma
)
884 /* If the next token is a ';', we have reached the
885 end of the statement. */
888 /* Consume the ';'. */
889 c_parser_consume_token (parser
);
894 case CPP_CLOSE_BRACE
:
895 /* If the next token is a non-nested '}', then we have
896 reached the end of the current block. */
897 if (nesting_depth
== 0 || --nesting_depth
== 0)
899 c_parser_consume_token (parser
);
905 /* If it the next token is a '{', then we are entering a new
906 block. Consume the entire block. */
911 /* If we see a pragma, consume the whole thing at once. We
912 have some safeguards against consuming pragmas willy-nilly.
913 Normally, we'd expect to be here with parser->error set,
914 which disables these safeguards. But it's possible to get
915 here for secondary error recovery, after parser->error has
917 c_parser_consume_pragma (parser
);
918 c_parser_skip_to_pragma_eol (parser
);
919 parser
->error
= save_error
;
926 c_parser_consume_token (parser
);
930 parser
->error
= false;
933 /* Save the warning flags which are controlled by __extension__. */
936 disable_extension_diagnostics (void)
939 | (warn_pointer_arith
<< 1)
940 | (warn_traditional
<< 2)
943 warn_pointer_arith
= 0;
944 warn_traditional
= 0;
949 /* Restore the warning flags which are controlled by __extension__.
950 FLAGS is the return value from disable_extension_diagnostics. */
953 restore_extension_diagnostics (int flags
)
955 pedantic
= flags
& 1;
956 warn_pointer_arith
= (flags
>> 1) & 1;
957 warn_traditional
= (flags
>> 2) & 1;
958 flag_iso
= (flags
>> 3) & 1;
961 /* Possibly kinds of declarator to parse. */
962 typedef enum c_dtr_syn
{
963 /* A normal declarator with an identifier. */
965 /* An abstract declarator (maybe empty). */
967 /* A parameter declarator: may be either, but after a type name does
968 not redeclare a typedef name as an identifier if it can
969 alternatively be interpreted as a typedef name; see DR#009,
970 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
971 following DR#249. For example, given a typedef T, "int T" and
972 "int *T" are valid parameter declarations redeclaring T, while
973 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
974 abstract declarators rather than involving redundant parentheses;
975 the same applies with attributes inside the parentheses before
980 static void c_parser_external_declaration (c_parser
*);
981 static void c_parser_asm_definition (c_parser
*);
982 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool, bool);
983 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
985 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
986 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
987 static tree
c_parser_struct_declaration (c_parser
*);
988 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
989 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
991 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
993 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
995 struct c_declarator
*);
996 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
997 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
998 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
999 static tree
c_parser_simple_asm_expr (c_parser
*);
1000 static tree
c_parser_attributes (c_parser
*);
1001 static struct c_type_name
*c_parser_type_name (c_parser
*);
1002 static struct c_expr
c_parser_initializer (c_parser
*);
1003 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1004 static void c_parser_initelt (c_parser
*);
1005 static void c_parser_initval (c_parser
*, struct c_expr
*);
1006 static tree
c_parser_compound_statement (c_parser
*);
1007 static void c_parser_compound_statement_nostart (c_parser
*);
1008 static void c_parser_label (c_parser
*);
1009 static void c_parser_statement (c_parser
*);
1010 static void c_parser_statement_after_labels (c_parser
*);
1011 static void c_parser_if_statement (c_parser
*);
1012 static void c_parser_switch_statement (c_parser
*);
1013 static void c_parser_while_statement (c_parser
*);
1014 static void c_parser_do_statement (c_parser
*);
1015 static void c_parser_for_statement (c_parser
*);
1016 static tree
c_parser_asm_statement (c_parser
*);
1017 static tree
c_parser_asm_operands (c_parser
*, bool);
1018 static tree
c_parser_asm_clobbers (c_parser
*);
1019 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1020 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1022 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1023 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1024 static struct c_expr
c_parser_unary_expression (c_parser
*);
1025 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1026 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1027 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1028 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1029 struct c_type_name
*);
1030 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1032 static struct c_expr
c_parser_expression (c_parser
*);
1033 static struct c_expr
c_parser_expression_conv (c_parser
*);
1034 static tree
c_parser_expr_list (c_parser
*, bool);
1035 static void c_parser_omp_construct (c_parser
*);
1036 static void c_parser_omp_threadprivate (c_parser
*);
1037 static void c_parser_omp_barrier (c_parser
*);
1038 static void c_parser_omp_flush (c_parser
*);
1040 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1041 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1043 /* These Objective-C parser functions are only ever called when
1044 compiling Objective-C. */
1045 static void c_parser_objc_class_definition (c_parser
*);
1046 static void c_parser_objc_class_instance_variables (c_parser
*);
1047 static void c_parser_objc_class_declaration (c_parser
*);
1048 static void c_parser_objc_alias_declaration (c_parser
*);
1049 static void c_parser_objc_protocol_definition (c_parser
*);
1050 static enum tree_code
c_parser_objc_method_type (c_parser
*);
1051 static void c_parser_objc_method_definition (c_parser
*);
1052 static void c_parser_objc_methodprotolist (c_parser
*);
1053 static void c_parser_objc_methodproto (c_parser
*);
1054 static tree
c_parser_objc_method_decl (c_parser
*);
1055 static tree
c_parser_objc_type_name (c_parser
*);
1056 static tree
c_parser_objc_protocol_refs (c_parser
*);
1057 static void c_parser_objc_try_catch_statement (c_parser
*);
1058 static void c_parser_objc_synchronized_statement (c_parser
*);
1059 static tree
c_parser_objc_selector (c_parser
*);
1060 static tree
c_parser_objc_selector_arg (c_parser
*);
1061 static tree
c_parser_objc_receiver (c_parser
*);
1062 static tree
c_parser_objc_message_args (c_parser
*);
1063 static tree
c_parser_objc_keywordexpr (c_parser
*);
1065 /* Parse a translation unit (C90 6.7, C99 6.9).
1068 external-declarations
1070 external-declarations:
1071 external-declaration
1072 external-declarations external-declaration
1081 c_parser_translation_unit (c_parser
*parser
)
1083 if (c_parser_next_token_is (parser
, CPP_EOF
))
1086 pedwarn ("ISO C forbids an empty source file");
1090 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1094 c_parser_external_declaration (parser
);
1095 obstack_free (&parser_obstack
, obstack_position
);
1097 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1101 /* Parse an external declaration (C90 6.7, C99 6.9).
1103 external-declaration:
1109 external-declaration:
1112 __extension__ external-declaration
1116 external-declaration:
1117 objc-class-definition
1118 objc-class-declaration
1119 objc-alias-declaration
1120 objc-protocol-definition
1121 objc-method-definition
1126 c_parser_external_declaration (c_parser
*parser
)
1129 switch (c_parser_peek_token (parser
)->type
)
1132 switch (c_parser_peek_token (parser
)->keyword
)
1135 ext
= disable_extension_diagnostics ();
1136 c_parser_consume_token (parser
);
1137 c_parser_external_declaration (parser
);
1138 restore_extension_diagnostics (ext
);
1141 c_parser_asm_definition (parser
);
1143 case RID_AT_INTERFACE
:
1144 case RID_AT_IMPLEMENTATION
:
1145 gcc_assert (c_dialect_objc ());
1146 c_parser_objc_class_definition (parser
);
1149 gcc_assert (c_dialect_objc ());
1150 c_parser_objc_class_declaration (parser
);
1153 gcc_assert (c_dialect_objc ());
1154 c_parser_objc_alias_declaration (parser
);
1156 case RID_AT_PROTOCOL
:
1157 gcc_assert (c_dialect_objc ());
1158 c_parser_objc_protocol_definition (parser
);
1161 gcc_assert (c_dialect_objc ());
1162 c_parser_consume_token (parser
);
1163 objc_finish_implementation ();
1171 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
1172 c_parser_consume_token (parser
);
1175 c_parser_pragma (parser
, pragma_external
);
1179 if (c_dialect_objc ())
1181 c_parser_objc_method_definition (parser
);
1184 /* Else fall through, and yield a syntax error trying to parse
1185 as a declaration or function definition. */
1188 /* A declaration or a function definition. We can only tell
1189 which after parsing the declaration specifiers, if any, and
1190 the first declarator. */
1191 c_parser_declaration_or_fndef (parser
, true, true, false, true);
1197 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1198 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1199 accepted; otherwise (old-style parameter declarations) only other
1200 declarations are accepted. If NESTED is true, we are inside a
1201 function or parsing old-style parameter declarations; any functions
1202 encountered are nested functions and declaration specifiers are
1203 required; otherwise we are at top level and functions are normal
1204 functions and declaration specifiers may be optional. If EMPTY_OK
1205 is true, empty declarations are OK (subject to all other
1206 constraints); otherwise (old-style parameter declarations) they are
1207 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1208 may start with attributes; otherwise they may not.
1211 declaration-specifiers init-declarator-list[opt] ;
1213 function-definition:
1214 declaration-specifiers[opt] declarator declaration-list[opt]
1219 declaration-list declaration
1221 init-declarator-list:
1223 init-declarator-list , init-declarator
1226 declarator simple-asm-expr[opt] attributes[opt]
1227 declarator simple-asm-expr[opt] attributes[opt] = initializer
1231 nested-function-definition:
1232 declaration-specifiers declarator declaration-list[opt]
1235 The simple-asm-expr and attributes are GNU extensions.
1237 This function does not handle __extension__; that is handled in its
1238 callers. ??? Following the old parser, __extension__ may start
1239 external declarations, declarations in functions and declarations
1240 at the start of "for" loops, but not old-style parameter
1243 C99 requires declaration specifiers in a function definition; the
1244 absence is diagnosed through the diagnosis of implicit int. In GNU
1245 C we also allow but diagnose declarations without declaration
1246 specifiers, but only at top level (elsewhere they conflict with
1252 threadprivate-directive */
1255 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
, bool empty_ok
,
1256 bool nested
, bool start_attr_ok
)
1258 struct c_declspecs
*specs
;
1260 tree all_prefix_attrs
;
1261 bool diagnosed_no_specs
= false;
1263 specs
= build_null_declspecs ();
1264 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
);
1267 c_parser_skip_to_end_of_block_or_statement (parser
);
1270 if (nested
&& !specs
->declspecs_seen_p
)
1272 c_parser_error (parser
, "expected declaration specifiers");
1273 c_parser_skip_to_end_of_block_or_statement (parser
);
1276 finish_declspecs (specs
);
1277 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1283 shadow_tag_warned (specs
, 1);
1284 pedwarn ("empty declaration");
1286 c_parser_consume_token (parser
);
1289 pending_xref_error ();
1290 prefix_attrs
= specs
->attrs
;
1291 all_prefix_attrs
= prefix_attrs
;
1292 specs
->attrs
= NULL_TREE
;
1295 struct c_declarator
*declarator
;
1298 /* Declaring either one or more declarators (in which case we
1299 should diagnose if there were no declaration specifiers) or a
1300 function definition (in which case the diagnostic for
1301 implicit int suffices). */
1302 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1303 C_DTR_NORMAL
, &dummy
);
1304 if (declarator
== NULL
)
1306 c_parser_skip_to_end_of_block_or_statement (parser
);
1309 if (c_parser_next_token_is (parser
, CPP_EQ
)
1310 || c_parser_next_token_is (parser
, CPP_COMMA
)
1311 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1312 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1313 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1315 tree asm_name
= NULL_TREE
;
1316 tree postfix_attrs
= NULL_TREE
;
1317 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1319 diagnosed_no_specs
= true;
1320 pedwarn ("data definition has no type or storage class");
1322 /* Having seen a data definition, there cannot now be a
1323 function definition. */
1325 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1326 asm_name
= c_parser_simple_asm_expr (parser
);
1327 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1328 postfix_attrs
= c_parser_attributes (parser
);
1329 if (c_parser_next_token_is (parser
, CPP_EQ
))
1333 c_parser_consume_token (parser
);
1334 /* The declaration of the variable is in effect while
1335 its initializer is parsed. */
1336 d
= start_decl (declarator
, specs
, true,
1337 chainon (postfix_attrs
, all_prefix_attrs
));
1339 d
= error_mark_node
;
1340 start_init (d
, asm_name
, global_bindings_p ());
1341 init
= c_parser_initializer (parser
);
1343 if (d
!= error_mark_node
)
1345 maybe_warn_string_init (TREE_TYPE (d
), init
);
1346 finish_decl (d
, init
.value
, asm_name
);
1351 tree d
= start_decl (declarator
, specs
, false,
1352 chainon (postfix_attrs
,
1355 finish_decl (d
, NULL_TREE
, asm_name
);
1357 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1359 c_parser_consume_token (parser
);
1360 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1361 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1364 all_prefix_attrs
= prefix_attrs
;
1367 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1369 c_parser_consume_token (parser
);
1374 c_parser_error (parser
, "expected %<,%> or %<;%>");
1375 c_parser_skip_to_end_of_block_or_statement (parser
);
1381 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1382 "%<asm%> or %<__attribute__%>");
1383 c_parser_skip_to_end_of_block_or_statement (parser
);
1386 /* Function definition (nested or otherwise). */
1390 pedwarn ("ISO C forbids nested functions");
1391 push_function_context ();
1393 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1395 /* This can appear in many cases looking nothing like a
1396 function definition, so we don't give a more specific
1397 error suggesting there was one. */
1398 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1399 "or %<__attribute__%>");
1401 pop_function_context ();
1404 /* Parse old-style parameter declarations. ??? Attributes are
1405 not allowed to start declaration specifiers here because of a
1406 syntax conflict between a function declaration with attribute
1407 suffix and a function definition with an attribute prefix on
1408 first old-style parameter declaration. Following the old
1409 parser, they are not accepted on subsequent old-style
1410 parameter declarations either. However, there is no
1411 ambiguity after the first declaration, nor indeed on the
1412 first as long as we don't allow postfix attributes after a
1413 declarator with a nonempty identifier list in a definition;
1414 and postfix attributes have never been accepted here in
1415 function definitions either. */
1416 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1417 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1418 c_parser_declaration_or_fndef (parser
, false, false, true, false);
1419 DECL_SOURCE_LOCATION (current_function_decl
)
1420 = c_parser_peek_token (parser
)->location
;
1421 store_parm_decls ();
1422 fnbody
= c_parser_compound_statement (parser
);
1425 tree decl
= current_function_decl
;
1428 pop_function_context ();
1429 add_stmt (build_stmt (DECL_EXPR
, decl
));
1440 /* Parse an asm-definition (asm() outside a function body). This is a
1448 c_parser_asm_definition (c_parser
*parser
)
1450 tree asm_str
= c_parser_simple_asm_expr (parser
);
1452 cgraph_add_asm_node (asm_str
);
1453 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1456 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1457 6.7), adding them to SPECS (which may already include some).
1458 Storage class specifiers are accepted iff SCSPEC_OK; type
1459 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1460 the start iff START_ATTR_OK.
1462 declaration-specifiers:
1463 storage-class-specifier declaration-specifiers[opt]
1464 type-specifier declaration-specifiers[opt]
1465 type-qualifier declaration-specifiers[opt]
1466 function-specifier declaration-specifiers[opt]
1468 Function specifiers (inline) are from C99, and are currently
1469 handled as storage class specifiers, as is __thread.
1471 C90 6.5.1, C99 6.7.1:
1472 storage-class-specifier:
1483 C90 6.5.2, C99 6.7.2:
1496 [_Imaginary removed in C99 TC2]
1497 struct-or-union-specifier
1501 (_Bool and _Complex are new in C99.)
1503 C90 6.5.3, C99 6.7.3:
1510 (restrict is new in C99.)
1514 declaration-specifiers:
1515 attributes declaration-specifiers[opt]
1517 storage-class-specifier:
1529 class-name objc-protocol-refs[opt]
1530 typedef-name objc-protocol-refs
1535 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1536 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
)
1538 bool attrs_ok
= start_attr_ok
;
1539 bool seen_type
= specs
->type_seen_p
;
1540 while (c_parser_next_token_is (parser
, CPP_NAME
)
1541 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1542 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1544 struct c_typespec t
;
1546 if (c_parser_next_token_is (parser
, CPP_NAME
))
1548 tree value
= c_parser_peek_token (parser
)->value
;
1549 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1550 /* This finishes the specifiers unless a type name is OK, it
1551 is declared as a type name and a type name hasn't yet
1553 if (!typespec_ok
|| seen_type
1554 || (kind
!= C_ID_TYPENAME
&& kind
!= C_ID_CLASSNAME
))
1556 c_parser_consume_token (parser
);
1559 if (kind
== C_ID_TYPENAME
1560 && (!c_dialect_objc ()
1561 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
1563 t
.kind
= ctsk_typedef
;
1564 /* For a typedef name, record the meaning, not the name.
1565 In case of 'foo foo, bar;'. */
1566 t
.spec
= lookup_name (value
);
1570 tree proto
= NULL_TREE
;
1571 gcc_assert (c_dialect_objc ());
1573 if (c_parser_next_token_is (parser
, CPP_LESS
))
1574 proto
= c_parser_objc_protocol_refs (parser
);
1575 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1577 declspecs_add_type (specs
, t
);
1580 if (c_parser_next_token_is (parser
, CPP_LESS
))
1582 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1583 nisse@lysator.liu.se. */
1585 gcc_assert (c_dialect_objc ());
1586 if (!typespec_ok
|| seen_type
)
1588 proto
= c_parser_objc_protocol_refs (parser
);
1590 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1591 declspecs_add_type (specs
, t
);
1594 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1595 switch (c_parser_peek_token (parser
)->keyword
)
1607 /* TODO: Distinguish between function specifiers (inline)
1608 and storage class specifiers, either here or in
1609 declspecs_add_scspec. */
1610 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1611 c_parser_consume_token (parser
);
1631 OBJC_NEED_RAW_IDENTIFIER (1);
1632 t
.kind
= ctsk_resword
;
1633 t
.spec
= c_parser_peek_token (parser
)->value
;
1634 declspecs_add_type (specs
, t
);
1635 c_parser_consume_token (parser
);
1642 t
= c_parser_enum_specifier (parser
);
1643 declspecs_add_type (specs
, t
);
1651 t
= c_parser_struct_or_union_specifier (parser
);
1652 declspecs_add_type (specs
, t
);
1655 /* ??? The old parser rejected typeof after other type
1656 specifiers, but is a syntax error the best way of
1658 if (!typespec_ok
|| seen_type
)
1662 t
= c_parser_typeof_specifier (parser
);
1663 declspecs_add_type (specs
, t
);
1669 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1670 c_parser_consume_token (parser
);
1675 attrs
= c_parser_attributes (parser
);
1676 declspecs_add_attrs (specs
, attrs
);
1685 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1688 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1689 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1690 enum attributes[opt] identifier
1692 The form with trailing comma is new in C99. The forms with
1693 attributes are GNU extensions. In GNU C, we accept any expression
1694 without commas in the syntax (assignment expressions, not just
1695 conditional expressions); assignment expressions will be diagnosed
1700 enumerator-list , enumerator
1703 enumeration-constant
1704 enumeration-constant = constant-expression
1707 static struct c_typespec
1708 c_parser_enum_specifier (c_parser
*parser
)
1710 struct c_typespec ret
;
1712 tree ident
= NULL_TREE
;
1713 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1714 c_parser_consume_token (parser
);
1715 attrs
= c_parser_attributes (parser
);
1716 if (c_parser_next_token_is (parser
, CPP_NAME
))
1718 ident
= c_parser_peek_token (parser
)->value
;
1719 c_parser_consume_token (parser
);
1721 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1723 /* Parse an enum definition. */
1724 tree type
= start_enum (ident
);
1726 /* We chain the enumerators in reverse order, then put them in
1727 forward order at the end. */
1728 tree values
= NULL_TREE
;
1729 c_parser_consume_token (parser
);
1736 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1738 c_parser_error (parser
, "expected identifier");
1739 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1740 values
= error_mark_node
;
1743 enum_id
= c_parser_peek_token (parser
)->value
;
1744 c_parser_consume_token (parser
);
1745 if (c_parser_next_token_is (parser
, CPP_EQ
))
1747 c_parser_consume_token (parser
);
1748 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1751 enum_value
= NULL_TREE
;
1752 enum_decl
= build_enumerator (enum_id
, enum_value
);
1753 TREE_CHAIN (enum_decl
) = values
;
1756 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1759 c_parser_consume_token (parser
);
1761 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1763 if (seen_comma
&& pedantic
&& !flag_isoc99
)
1764 pedwarn ("comma at end of enumerator list");
1765 c_parser_consume_token (parser
);
1770 c_parser_error (parser
, "expected %<,%> or %<}%>");
1771 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1772 values
= error_mark_node
;
1776 postfix_attrs
= c_parser_attributes (parser
);
1777 ret
.spec
= finish_enum (type
, nreverse (values
),
1778 chainon (attrs
, postfix_attrs
));
1779 ret
.kind
= ctsk_tagdef
;
1784 c_parser_error (parser
, "expected %<{%>");
1785 ret
.spec
= error_mark_node
;
1786 ret
.kind
= ctsk_tagref
;
1789 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1790 /* In ISO C, enumerated types can be referred to only if already
1792 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1793 pedwarn ("ISO C forbids forward references to %<enum%> types");
1797 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1799 struct-or-union-specifier:
1800 struct-or-union attributes[opt] identifier[opt]
1801 { struct-contents } attributes[opt]
1802 struct-or-union attributes[opt] identifier
1805 struct-declaration-list
1807 struct-declaration-list:
1808 struct-declaration ;
1809 struct-declaration-list struct-declaration ;
1816 struct-declaration-list struct-declaration
1818 struct-declaration-list:
1819 struct-declaration-list ;
1822 (Note that in the syntax here, unlike that in ISO C, the semicolons
1823 are included here rather than in struct-declaration, in order to
1824 describe the syntax with extra semicolons and missing semicolon at
1829 struct-declaration-list:
1830 @defs ( class-name )
1832 (Note this does not include a trailing semicolon, but can be
1833 followed by further declarations, and gets a pedwarn-if-pedantic
1834 when followed by a semicolon.) */
1836 static struct c_typespec
1837 c_parser_struct_or_union_specifier (c_parser
*parser
)
1839 struct c_typespec ret
;
1841 tree ident
= NULL_TREE
;
1842 enum tree_code code
;
1843 switch (c_parser_peek_token (parser
)->keyword
)
1854 c_parser_consume_token (parser
);
1855 attrs
= c_parser_attributes (parser
);
1856 if (c_parser_next_token_is (parser
, CPP_NAME
))
1858 ident
= c_parser_peek_token (parser
)->value
;
1859 c_parser_consume_token (parser
);
1861 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1863 /* Parse a struct or union definition. Start the scope of the
1864 tag before parsing components. */
1865 tree type
= start_struct (code
, ident
);
1867 /* We chain the components in reverse order, then put them in
1868 forward order at the end. Each struct-declaration may
1869 declare multiple components (comma-separated), so we must use
1870 chainon to join them, although when parsing each
1871 struct-declaration we can use TREE_CHAIN directly.
1873 The theory behind all this is that there will be more
1874 semicolon separated fields than comma separated fields, and
1875 so we'll be minimizing the number of node traversals required
1877 tree contents
= NULL_TREE
;
1878 c_parser_consume_token (parser
);
1879 /* Handle the Objective-C @defs construct,
1880 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1881 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1884 gcc_assert (c_dialect_objc ());
1885 c_parser_consume_token (parser
);
1886 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1888 if (c_parser_next_token_is (parser
, CPP_NAME
)
1889 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1891 name
= c_parser_peek_token (parser
)->value
;
1892 c_parser_consume_token (parser
);
1896 c_parser_error (parser
, "expected class name");
1897 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1900 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1902 contents
= nreverse (objc_get_class_ivars (name
));
1905 /* Parse the struct-declarations and semicolons. Problems with
1906 semicolons are diagnosed here; empty structures are diagnosed
1911 /* Parse any stray semicolon. */
1912 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1915 pedwarn ("extra semicolon in struct or union specified");
1916 c_parser_consume_token (parser
);
1919 /* Stop if at the end of the struct or union contents. */
1920 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1922 c_parser_consume_token (parser
);
1925 /* Accept #pragmas at struct scope. */
1926 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1928 c_parser_pragma (parser
, pragma_external
);
1931 /* Parse some comma-separated declarations, but not the
1932 trailing semicolon if any. */
1933 decls
= c_parser_struct_declaration (parser
);
1934 contents
= chainon (decls
, contents
);
1935 /* If no semicolon follows, either we have a parse error or
1936 are at the end of the struct or union and should
1938 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1939 c_parser_consume_token (parser
);
1942 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1943 pedwarn ("no semicolon at end of struct or union");
1946 c_parser_error (parser
, "expected %<;%>");
1947 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1952 postfix_attrs
= c_parser_attributes (parser
);
1953 ret
.spec
= finish_struct (type
, nreverse (contents
),
1954 chainon (attrs
, postfix_attrs
));
1955 ret
.kind
= ctsk_tagdef
;
1960 c_parser_error (parser
, "expected %<{%>");
1961 ret
.spec
= error_mark_node
;
1962 ret
.kind
= ctsk_tagref
;
1965 ret
= parser_xref_tag (code
, ident
);
1969 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1970 the trailing semicolon.
1973 specifier-qualifier-list struct-declarator-list
1975 specifier-qualifier-list:
1976 type-specifier specifier-qualifier-list[opt]
1977 type-qualifier specifier-qualifier-list[opt]
1978 attributes specifier-qualifier-list[opt]
1980 struct-declarator-list:
1982 struct-declarator-list , attributes[opt] struct-declarator
1985 declarator attributes[opt]
1986 declarator[opt] : constant-expression attributes[opt]
1991 __extension__ struct-declaration
1992 specifier-qualifier-list
1994 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1995 of attributes where shown is a GNU extension. In GNU C, we accept
1996 any expression without commas in the syntax (assignment
1997 expressions, not just conditional expressions); assignment
1998 expressions will be diagnosed as non-constant. */
2001 c_parser_struct_declaration (c_parser
*parser
)
2003 struct c_declspecs
*specs
;
2005 tree all_prefix_attrs
;
2007 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2011 ext
= disable_extension_diagnostics ();
2012 c_parser_consume_token (parser
);
2013 decl
= c_parser_struct_declaration (parser
);
2014 restore_extension_diagnostics (ext
);
2017 specs
= build_null_declspecs ();
2018 c_parser_declspecs (parser
, specs
, false, true, true);
2021 if (!specs
->declspecs_seen_p
)
2023 c_parser_error (parser
, "expected specifier-qualifier-list");
2026 finish_declspecs (specs
);
2027 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2030 if (!specs
->type_seen_p
)
2033 pedwarn ("ISO C forbids member declarations with no members");
2034 shadow_tag_warned (specs
, pedantic
);
2039 /* Support for unnamed structs or unions as members of
2040 structs or unions (which is [a] useful and [b] supports
2042 ret
= grokfield (build_id_declarator (NULL_TREE
), specs
, NULL_TREE
);
2046 pending_xref_error ();
2047 prefix_attrs
= specs
->attrs
;
2048 all_prefix_attrs
= prefix_attrs
;
2049 specs
->attrs
= NULL_TREE
;
2053 /* Declaring one or more declarators or un-named bit-fields. */
2054 struct c_declarator
*declarator
;
2056 if (c_parser_next_token_is (parser
, CPP_COLON
))
2057 declarator
= build_id_declarator (NULL_TREE
);
2059 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2060 C_DTR_NORMAL
, &dummy
);
2061 if (declarator
== NULL
)
2063 c_parser_skip_to_end_of_block_or_statement (parser
);
2066 if (c_parser_next_token_is (parser
, CPP_COLON
)
2067 || c_parser_next_token_is (parser
, CPP_COMMA
)
2068 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2069 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2070 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2072 tree postfix_attrs
= NULL_TREE
;
2073 tree width
= NULL_TREE
;
2075 if (c_parser_next_token_is (parser
, CPP_COLON
))
2077 c_parser_consume_token (parser
);
2078 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2080 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2081 postfix_attrs
= c_parser_attributes (parser
);
2082 d
= grokfield (declarator
, specs
, width
);
2083 decl_attributes (&d
, chainon (postfix_attrs
,
2084 all_prefix_attrs
), 0);
2085 TREE_CHAIN (d
) = decls
;
2087 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2088 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2091 all_prefix_attrs
= prefix_attrs
;
2092 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2093 c_parser_consume_token (parser
);
2094 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2095 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2097 /* Semicolon consumed in caller. */
2102 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2108 c_parser_error (parser
,
2109 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2110 "%<__attribute__%>");
2117 /* Parse a typeof specifier (a GNU extension).
2120 typeof ( expression )
2121 typeof ( type-name )
2124 static struct c_typespec
2125 c_parser_typeof_specifier (c_parser
*parser
)
2127 struct c_typespec ret
;
2128 ret
.kind
= ctsk_typeof
;
2129 ret
.spec
= error_mark_node
;
2130 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2131 c_parser_consume_token (parser
);
2134 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2140 if (c_parser_next_token_starts_typename (parser
))
2142 struct c_type_name
*type
= c_parser_type_name (parser
);
2147 ret
.spec
= groktypename (type
);
2148 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2154 struct c_expr expr
= c_parser_expression (parser
);
2157 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2158 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2159 error ("%<typeof%> applied to a bit-field");
2160 ret
.spec
= TREE_TYPE (expr
.value
);
2161 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2162 /* This should be returned with the type so that when the type
2163 is evaluated, this can be evaluated. For now, we avoid
2164 evaluation when the context might. */
2165 if (!skip_evaluation
&& was_vm
)
2167 tree e
= expr
.value
;
2169 /* If the expression is not of a type to which we cannot assign a line
2170 number, wrap the thing in a no-op NOP_EXPR. */
2171 if (DECL_P (e
) || CONSTANT_CLASS_P (e
))
2172 e
= build1 (NOP_EXPR
, void_type_node
, e
);
2175 SET_EXPR_LOCATION (e
, input_location
);
2179 pop_maybe_used (was_vm
);
2181 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2185 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2186 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2187 be redeclared; otherwise it may not. KIND indicates which kind of
2188 declarator is wanted. Returns a valid declarator except in the
2189 case of a syntax error in which case NULL is returned. *SEEN_ID is
2190 set to true if an identifier being declared is seen; this is used
2191 to diagnose bad forms of abstract array declarators and to
2192 determine whether an identifier list is syntactically permitted.
2195 pointer[opt] direct-declarator
2199 ( attributes[opt] declarator )
2200 direct-declarator array-declarator
2201 direct-declarator ( parameter-type-list )
2202 direct-declarator ( identifier-list[opt] )
2205 * type-qualifier-list[opt]
2206 * type-qualifier-list[opt] pointer
2208 type-qualifier-list:
2211 type-qualifier-list type-qualifier
2212 type-qualifier-list attributes
2214 parameter-type-list:
2216 parameter-list , ...
2219 parameter-declaration
2220 parameter-list , parameter-declaration
2222 parameter-declaration:
2223 declaration-specifiers declarator attributes[opt]
2224 declaration-specifiers abstract-declarator[opt] attributes[opt]
2228 identifier-list , identifier
2230 abstract-declarator:
2232 pointer[opt] direct-abstract-declarator
2234 direct-abstract-declarator:
2235 ( attributes[opt] abstract-declarator )
2236 direct-abstract-declarator[opt] array-declarator
2237 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2242 direct-declarator ( parameter-forward-declarations
2243 parameter-type-list[opt] )
2245 direct-abstract-declarator:
2246 direct-abstract-declarator[opt] ( parameter-forward-declarations
2247 parameter-type-list[opt] )
2249 parameter-forward-declarations:
2251 parameter-forward-declarations parameter-list ;
2253 The uses of attributes shown above are GNU extensions.
2255 Some forms of array declarator are not included in C99 in the
2256 syntax for abstract declarators; these are disallowed elsewhere.
2257 This may be a defect (DR#289).
2259 This function also accepts an omitted abstract declarator as being
2260 an abstract declarator, although not part of the formal syntax. */
2262 static struct c_declarator
*
2263 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2266 /* Parse any initial pointer part. */
2267 if (c_parser_next_token_is (parser
, CPP_MULT
))
2269 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2270 struct c_declarator
*inner
;
2271 c_parser_consume_token (parser
);
2272 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2273 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2277 return make_pointer_declarator (quals_attrs
, inner
);
2279 /* Now we have a direct declarator, direct abstract declarator or
2280 nothing (which counts as a direct abstract declarator here). */
2281 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2284 /* Parse a direct declarator or direct abstract declarator; arguments
2285 as c_parser_declarator. */
2287 static struct c_declarator
*
2288 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2291 /* The direct declarator must start with an identifier (possibly
2292 omitted) or a parenthesized declarator (possibly abstract). In
2293 an ordinary declarator, initial parentheses must start a
2294 parenthesized declarator. In an abstract declarator or parameter
2295 declarator, they could start a parenthesized declarator or a
2296 parameter list. To tell which, the open parenthesis and any
2297 following attributes must be read. If a declaration specifier
2298 follows, then it is a parameter list; if the specifier is a
2299 typedef name, there might be an ambiguity about redeclaring it,
2300 which is resolved in the direction of treating it as a typedef
2301 name. If a close parenthesis follows, it is also an empty
2302 parameter list, as the syntax does not permit empty abstract
2303 declarators. Otherwise, it is a parenthesized declarator (in
2304 which case the analysis may be repeated inside it, recursively).
2306 ??? There is an ambiguity in a parameter declaration "int
2307 (__attribute__((foo)) x)", where x is not a typedef name: it
2308 could be an abstract declarator for a function, or declare x with
2309 parentheses. The proper resolution of this ambiguity needs
2310 documenting. At present we follow an accident of the old
2311 parser's implementation, whereby the first parameter must have
2312 some declaration specifiers other than just attributes. Thus as
2313 a parameter declaration it is treated as a parenthesized
2314 parameter named x, and as an abstract declarator it is
2317 ??? Also following the old parser, attributes inside an empty
2318 parameter list are ignored, making it a list not yielding a
2319 prototype, rather than giving an error or making it have one
2320 parameter with implicit type int.
2322 ??? Also following the old parser, typedef names may be
2323 redeclared in declarators, but not Objective-C class names. */
2325 if (kind
!= C_DTR_ABSTRACT
2326 && c_parser_next_token_is (parser
, CPP_NAME
)
2328 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2329 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2331 struct c_declarator
*inner
2332 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2334 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2335 c_parser_consume_token (parser
);
2336 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2339 if (kind
!= C_DTR_NORMAL
2340 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2342 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2343 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2346 /* Either we are at the end of an abstract declarator, or we have
2349 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2352 struct c_declarator
*inner
;
2353 c_parser_consume_token (parser
);
2354 attrs
= c_parser_attributes (parser
);
2355 if (kind
!= C_DTR_NORMAL
2356 && (c_parser_next_token_starts_declspecs (parser
)
2357 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2359 struct c_arg_info
*args
2360 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2367 = build_function_declarator (args
,
2368 build_id_declarator (NULL_TREE
));
2369 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2373 /* A parenthesized declarator. */
2374 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2375 if (inner
!= NULL
&& attrs
!= NULL
)
2376 inner
= build_attrs_declarator (attrs
, inner
);
2377 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2379 c_parser_consume_token (parser
);
2383 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2387 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2394 if (kind
== C_DTR_NORMAL
)
2396 c_parser_error (parser
, "expected identifier or %<(%>");
2400 return build_id_declarator (NULL_TREE
);
2404 /* Parse part of a direct declarator or direct abstract declarator,
2405 given that some (in INNER) has already been parsed; ID_PRESENT is
2406 true if an identifier is present, false for an abstract
2409 static struct c_declarator
*
2410 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2411 struct c_declarator
*inner
)
2413 /* Parse a sequence of array declarators and parameter lists. */
2414 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2416 struct c_declarator
*declarator
;
2417 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2421 c_parser_consume_token (parser
);
2422 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2423 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2425 c_parser_consume_token (parser
);
2426 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2427 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2428 if (!quals_attrs
->declspecs_seen_p
)
2430 /* If "static" is present, there must be an array dimension.
2431 Otherwise, there may be a dimension, "*", or no
2436 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2440 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2445 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2447 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2451 c_parser_consume_token (parser
);
2456 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2462 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2465 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2466 c_parser_consume_token (parser
);
2469 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2473 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2475 if (declarator
== NULL
)
2477 inner
= set_array_declarator_inner (declarator
, inner
, !id_present
);
2478 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2480 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2483 struct c_arg_info
*args
;
2484 c_parser_consume_token (parser
);
2485 attrs
= c_parser_attributes (parser
);
2486 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2491 inner
= build_function_declarator (args
, inner
);
2492 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2498 /* Parse a parameter list or identifier list, including the closing
2499 parenthesis but not the opening one. ATTRS are the attributes at
2500 the start of the list. ID_LIST_OK is true if an identifier list is
2501 acceptable; such a list must not have attributes at the start. */
2503 static struct c_arg_info
*
2504 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2507 declare_parm_level ();
2508 /* If the list starts with an identifier, it is an identifier list.
2509 Otherwise, it is either a prototype list or an empty list. */
2512 && c_parser_next_token_is (parser
, CPP_NAME
)
2513 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2515 tree list
= NULL_TREE
, *nextp
= &list
;
2516 while (c_parser_next_token_is (parser
, CPP_NAME
)
2517 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2519 *nextp
= build_tree_list (NULL_TREE
,
2520 c_parser_peek_token (parser
)->value
);
2521 nextp
= & TREE_CHAIN (*nextp
);
2522 c_parser_consume_token (parser
);
2523 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2525 c_parser_consume_token (parser
);
2526 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2528 c_parser_error (parser
, "expected identifier");
2532 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2534 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2539 ret
->pending_sizes
= 0;
2540 ret
->had_vla_unspec
= 0;
2541 c_parser_consume_token (parser
);
2547 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2555 struct c_arg_info
*ret
= c_parser_parms_list_declarator (parser
, attrs
);
2561 /* Parse a parameter list (possibly empty), including the closing
2562 parenthesis but not the opening one. ATTRS are the attributes at
2563 the start of the list. */
2565 static struct c_arg_info
*
2566 c_parser_parms_list_declarator (c_parser
*parser
, tree attrs
)
2568 bool good_parm
= false;
2569 /* ??? Following the old parser, forward parameter declarations may
2570 use abstract declarators, and if no real parameter declarations
2571 follow the forward declarations then this is not diagnosed. Also
2572 note as above that attributes are ignored as the only contents of
2573 the parentheses, or as the only contents after forward
2575 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2577 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2582 ret
->pending_sizes
= 0;
2583 ret
->had_vla_unspec
= 0;
2584 c_parser_consume_token (parser
);
2587 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2589 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2593 ret
->pending_sizes
= 0;
2594 ret
->had_vla_unspec
= 0;
2595 /* Suppress -Wold-style-definition for this case. */
2596 ret
->types
= error_mark_node
;
2597 error ("ISO C requires a named argument before %<...%>");
2598 c_parser_consume_token (parser
);
2599 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2601 c_parser_consume_token (parser
);
2606 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2611 /* Nonempty list of parameters, either terminated with semicolon
2612 (forward declarations; recurse) or with close parenthesis (normal
2613 function) or with ", ... )" (variadic function). */
2616 /* Parse a parameter. */
2617 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2622 push_parm_decl (parm
);
2624 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2627 c_parser_consume_token (parser
);
2628 mark_forward_parm_decls ();
2629 new_attrs
= c_parser_attributes (parser
);
2630 return c_parser_parms_list_declarator (parser
, new_attrs
);
2632 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2634 c_parser_consume_token (parser
);
2636 return get_parm_info (false);
2639 struct c_arg_info
*ret
2640 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2645 ret
->pending_sizes
= 0;
2646 ret
->had_vla_unspec
= 0;
2650 if (!c_parser_require (parser
, CPP_COMMA
,
2651 "expected %<;%>, %<,%> or %<)%>"))
2653 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2656 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2658 c_parser_consume_token (parser
);
2659 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2661 c_parser_consume_token (parser
);
2663 return get_parm_info (true);
2666 struct c_arg_info
*ret
2667 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2672 ret
->pending_sizes
= 0;
2673 ret
->had_vla_unspec
= 0;
2679 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2687 /* Parse a parameter declaration. ATTRS are the attributes at the
2688 start of the declaration if it is the first parameter. */
2690 static struct c_parm
*
2691 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2693 struct c_declspecs
*specs
;
2694 struct c_declarator
*declarator
;
2696 tree postfix_attrs
= NULL_TREE
;
2698 if (!c_parser_next_token_starts_declspecs (parser
))
2700 /* ??? In some Objective-C cases '...' isn't applicable so there
2701 should be a different message. */
2702 c_parser_error (parser
,
2703 "expected declaration specifiers or %<...%>");
2704 c_parser_skip_to_end_of_parameter (parser
);
2707 specs
= build_null_declspecs ();
2710 declspecs_add_attrs (specs
, attrs
);
2713 c_parser_declspecs (parser
, specs
, true, true, true);
2714 finish_declspecs (specs
);
2715 pending_xref_error ();
2716 prefix_attrs
= specs
->attrs
;
2717 specs
->attrs
= NULL_TREE
;
2718 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2719 C_DTR_PARM
, &dummy
);
2720 if (declarator
== NULL
)
2722 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2725 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2726 postfix_attrs
= c_parser_attributes (parser
);
2727 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2731 /* Parse a string literal in an asm expression. It should not be
2732 translated, and wide string literals are an error although
2733 permitted by the syntax. This is a GNU extension.
2738 ??? At present, following the old parser, the caller needs to have
2739 set c_lex_string_translate to 0. It would be better to follow the
2740 C++ parser rather than using the c_lex_string_translate kludge. */
2743 c_parser_asm_string_literal (c_parser
*parser
)
2746 if (c_parser_next_token_is (parser
, CPP_STRING
))
2748 str
= c_parser_peek_token (parser
)->value
;
2749 c_parser_consume_token (parser
);
2751 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2753 error ("wide string literal in %<asm%>");
2754 str
= build_string (1, "");
2755 c_parser_consume_token (parser
);
2759 c_parser_error (parser
, "expected string literal");
2765 /* Parse a simple asm expression. This is used in restricted
2766 contexts, where a full expression with inputs and outputs does not
2767 make sense. This is a GNU extension.
2770 asm ( asm-string-literal )
2774 c_parser_simple_asm_expr (c_parser
*parser
)
2777 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2778 /* ??? Follow the C++ parser rather than using the
2779 c_lex_string_translate kludge. */
2780 c_lex_string_translate
= 0;
2781 c_parser_consume_token (parser
);
2782 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2784 c_lex_string_translate
= 1;
2787 str
= c_parser_asm_string_literal (parser
);
2788 c_lex_string_translate
= 1;
2789 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2791 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2797 /* Parse (possibly empty) attributes. This is a GNU extension.
2801 attributes attribute
2804 __attribute__ ( ( attribute-list ) )
2808 attribute_list , attrib
2813 any-word ( identifier )
2814 any-word ( identifier , nonempty-expr-list )
2815 any-word ( expr-list )
2817 where the "identifier" must not be declared as a type, and
2818 "any-word" may be any identifier (including one declared as a
2819 type), a reserved word storage class specifier, type specifier or
2820 type qualifier. ??? This still leaves out most reserved keywords
2821 (following the old parser), shouldn't we include them, and why not
2822 allow identifiers declared as types to start the arguments? */
2825 c_parser_attributes (c_parser
*parser
)
2827 tree attrs
= NULL_TREE
;
2828 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2830 /* ??? Follow the C++ parser rather than using the
2831 c_lex_string_translate kludge. */
2832 c_lex_string_translate
= 0;
2833 c_parser_consume_token (parser
);
2834 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2836 c_lex_string_translate
= 1;
2839 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2841 c_lex_string_translate
= 1;
2842 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2845 /* Parse the attribute list. */
2846 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2847 || c_parser_next_token_is (parser
, CPP_NAME
)
2848 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2850 tree attr
, attr_name
, attr_args
;
2851 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2853 c_parser_consume_token (parser
);
2856 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2858 /* ??? See comment above about what keywords are
2861 switch (c_parser_peek_token (parser
)->keyword
)
2896 attr_name
= c_parser_peek_token (parser
)->value
;
2897 c_parser_consume_token (parser
);
2898 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2900 attr
= build_tree_list (attr_name
, NULL_TREE
);
2901 attrs
= chainon (attrs
, attr
);
2904 c_parser_consume_token (parser
);
2905 /* Parse the attribute contents. If they start with an
2906 identifier which is followed by a comma or close
2907 parenthesis, then the arguments start with that
2908 identifier; otherwise they are an expression list. */
2909 if (c_parser_next_token_is (parser
, CPP_NAME
)
2910 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2911 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2912 || (c_parser_peek_2nd_token (parser
)->type
2913 == CPP_CLOSE_PAREN
)))
2915 tree arg1
= c_parser_peek_token (parser
)->value
;
2916 c_parser_consume_token (parser
);
2917 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2918 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2921 c_parser_consume_token (parser
);
2922 attr_args
= tree_cons (NULL_TREE
, arg1
,
2923 c_parser_expr_list (parser
, false));
2928 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2929 attr_args
= NULL_TREE
;
2931 attr_args
= c_parser_expr_list (parser
, false);
2933 attr
= build_tree_list (attr_name
, attr_args
);
2934 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2935 c_parser_consume_token (parser
);
2938 c_lex_string_translate
= 1;
2939 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2943 attrs
= chainon (attrs
, attr
);
2945 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2946 c_parser_consume_token (parser
);
2949 c_lex_string_translate
= 1;
2950 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2954 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2955 c_parser_consume_token (parser
);
2958 c_lex_string_translate
= 1;
2959 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2963 c_lex_string_translate
= 1;
2968 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2971 specifier-qualifier-list abstract-declarator[opt]
2974 static struct c_type_name
*
2975 c_parser_type_name (c_parser
*parser
)
2977 struct c_declspecs
*specs
= build_null_declspecs ();
2978 struct c_declarator
*declarator
;
2979 struct c_type_name
*ret
;
2981 c_parser_declspecs (parser
, specs
, false, true, true);
2982 if (!specs
->declspecs_seen_p
)
2984 c_parser_error (parser
, "expected specifier-qualifier-list");
2987 pending_xref_error ();
2988 finish_declspecs (specs
);
2989 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2990 C_DTR_ABSTRACT
, &dummy
);
2991 if (declarator
== NULL
)
2993 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2995 ret
->declarator
= declarator
;
2999 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
3002 assignment-expression
3003 { initializer-list }
3004 { initializer-list , }
3007 designation[opt] initializer
3008 initializer-list , designation[opt] initializer
3015 designator-list designator
3022 [ constant-expression ]
3034 [ constant-expression ... constant-expression ]
3036 Any expression without commas is accepted in the syntax for the
3037 constant-expressions, with non-constant expressions rejected later.
3039 This function is only used for top-level initializers; for nested
3040 ones, see c_parser_initval. */
3042 static struct c_expr
3043 c_parser_initializer (c_parser
*parser
)
3045 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3046 return c_parser_braced_init (parser
, NULL_TREE
, false);
3050 ret
= c_parser_expr_no_commas (parser
, NULL
);
3051 if (TREE_CODE (ret
.value
) != STRING_CST
3052 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3053 ret
= default_function_array_conversion (ret
);
3058 /* Parse a braced initializer list. TYPE is the type specified for a
3059 compound literal, and NULL_TREE for other initializers and for
3060 nested braced lists. NESTED_P is true for nested braced lists,
3061 false for the list of a compound literal or the list that is the
3062 top-level initializer in a declaration. */
3064 static struct c_expr
3065 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3067 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3068 c_parser_consume_token (parser
);
3070 push_init_level (0);
3072 really_start_incremental_init (type
);
3073 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3076 pedwarn ("ISO C forbids empty initializer braces");
3080 /* Parse a non-empty initializer list, possibly with a trailing
3084 c_parser_initelt (parser
);
3087 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3088 c_parser_consume_token (parser
);
3091 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3095 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3098 ret
.value
= error_mark_node
;
3099 ret
.original_code
= ERROR_MARK
;
3100 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3103 c_parser_consume_token (parser
);
3104 return pop_init_level (0);
3107 /* Parse a nested initializer, including designators. */
3110 c_parser_initelt (c_parser
*parser
)
3112 /* Parse any designator or designator list. A single array
3113 designator may have the subsequent "=" omitted in GNU C, but a
3114 longer list or a structure member designator may not. */
3115 if (c_parser_next_token_is (parser
, CPP_NAME
)
3116 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3118 /* Old-style structure member designator. */
3119 set_init_label (c_parser_peek_token (parser
)->value
);
3121 pedwarn ("obsolete use of designated initializer with %<:%>");
3122 c_parser_consume_token (parser
);
3123 c_parser_consume_token (parser
);
3127 /* des_seen is 0 if there have been no designators, 1 if there
3128 has been a single array designator and 2 otherwise. */
3130 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3131 || c_parser_next_token_is (parser
, CPP_DOT
))
3133 int des_prev
= des_seen
;
3136 if (c_parser_next_token_is (parser
, CPP_DOT
))
3139 c_parser_consume_token (parser
);
3140 if (c_parser_next_token_is (parser
, CPP_NAME
))
3142 set_init_label (c_parser_peek_token (parser
)->value
);
3143 c_parser_consume_token (parser
);
3148 init
.value
= error_mark_node
;
3149 init
.original_code
= ERROR_MARK
;
3150 c_parser_error (parser
, "expected identifier");
3151 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3152 process_init_element (init
);
3159 /* ??? Following the old parser, [ objc-receiver
3160 objc-message-args ] is accepted as an initializer,
3161 being distinguished from a designator by what follows
3162 the first assignment expression inside the square
3163 brackets, but after a first array designator a
3164 subsequent square bracket is for Objective-C taken to
3165 start an expression, using the obsolete form of
3166 designated initializer without '=', rather than
3167 possibly being a second level of designation: in LALR
3168 terms, the '[' is shifted rather than reducing
3169 designator to designator-list. */
3170 if (des_prev
== 1 && c_dialect_objc ())
3172 des_seen
= des_prev
;
3175 if (des_prev
== 0 && c_dialect_objc ())
3177 /* This might be an array designator or an
3178 Objective-C message expression. If the former,
3179 continue parsing here; if the latter, parse the
3180 remainder of the initializer given the starting
3181 primary-expression. ??? It might make sense to
3182 distinguish when des_prev == 1 as well; see
3183 previous comment. */
3185 struct c_expr mexpr
;
3186 c_parser_consume_token (parser
);
3187 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3188 && ((c_parser_peek_token (parser
)->id_kind
3190 || (c_parser_peek_token (parser
)->id_kind
3191 == C_ID_CLASSNAME
)))
3193 /* Type name receiver. */
3194 tree id
= c_parser_peek_token (parser
)->value
;
3195 c_parser_consume_token (parser
);
3196 rec
= objc_get_class_reference (id
);
3197 goto parse_message_args
;
3199 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3200 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3201 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3202 goto array_desig_after_first
;
3203 /* Expression receiver. So far only one part
3204 without commas has been parsed; there might be
3205 more of the expression. */
3207 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3210 c_parser_consume_token (parser
);
3211 next
= c_parser_expr_no_commas (parser
, NULL
);
3212 next
= default_function_array_conversion (next
);
3213 rec
= build_compound_expr (rec
, next
.value
);
3216 /* Now parse the objc-message-args. */
3217 args
= c_parser_objc_message_args (parser
);
3218 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3221 = objc_build_message_expr (build_tree_list (rec
, args
));
3222 mexpr
.original_code
= ERROR_MARK
;
3223 /* Now parse and process the remainder of the
3224 initializer, starting with this message
3225 expression as a primary-expression. */
3226 c_parser_initval (parser
, &mexpr
);
3229 c_parser_consume_token (parser
);
3230 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3231 array_desig_after_first
:
3232 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3234 c_parser_consume_token (parser
);
3235 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3239 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3241 c_parser_consume_token (parser
);
3242 set_init_index (first
, second
);
3243 if (pedantic
&& second
)
3244 pedwarn ("ISO C forbids specifying range of "
3245 "elements to initialize");
3248 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3254 if (c_parser_next_token_is (parser
, CPP_EQ
))
3256 if (pedantic
&& !flag_isoc99
)
3257 pedwarn ("ISO C90 forbids specifying subobject to initialize");
3258 c_parser_consume_token (parser
);
3265 pedwarn ("obsolete use of designated initializer "
3271 init
.value
= error_mark_node
;
3272 init
.original_code
= ERROR_MARK
;
3273 c_parser_error (parser
, "expected %<=%>");
3274 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3275 process_init_element (init
);
3281 c_parser_initval (parser
, NULL
);
3284 /* Parse a nested initializer; as c_parser_initializer but parses
3285 initializers within braced lists, after any designators have been
3286 applied. If AFTER is not NULL then it is an Objective-C message
3287 expression which is the primary-expression starting the
3291 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3294 gcc_assert (!after
|| c_dialect_objc ());
3295 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3296 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3299 init
= c_parser_expr_no_commas (parser
, after
);
3300 if (init
.value
!= NULL_TREE
3301 && TREE_CODE (init
.value
) != STRING_CST
3302 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3303 init
= default_function_array_conversion (init
);
3305 process_init_element (init
);
3308 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3312 { block-item-list[opt] }
3313 { label-declarations block-item-list }
3317 block-item-list block-item
3329 { label-declarations block-item-list }
3332 __extension__ nested-declaration
3333 nested-function-definition
3337 label-declarations label-declaration
3340 __label__ identifier-list ;
3342 Allowing the mixing of declarations and code is new in C99. The
3343 GNU syntax also permits (not shown above) labels at the end of
3344 compound statements, which yield an error. We don't allow labels
3345 on declarations; this might seem like a natural extension, but
3346 there would be a conflict between attributes on the label and
3347 prefix attributes on the declaration. ??? The syntax follows the
3348 old parser in requiring something after label declarations.
3349 Although they are erroneous if the labels declared aren't defined,
3350 is it useful for the syntax to be this way?
3362 c_parser_compound_statement (c_parser
*parser
)
3365 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3366 return error_mark_node
;
3367 stmt
= c_begin_compound_stmt (true);
3368 c_parser_compound_statement_nostart (parser
);
3369 return c_end_compound_stmt (stmt
, true);
3372 /* Parse a compound statement except for the opening brace. This is
3373 used for parsing both compound statements and statement expressions
3374 (which follow different paths to handling the opening). */
3377 c_parser_compound_statement_nostart (c_parser
*parser
)
3379 bool last_stmt
= false;
3380 bool last_label
= false;
3381 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3383 c_parser_consume_token (parser
);
3386 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3388 /* Read zero or more forward-declarations for labels that nested
3389 functions can jump to. */
3390 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3392 c_parser_consume_token (parser
);
3393 /* Any identifiers, including those declared as type names,
3398 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3400 c_parser_error (parser
, "expected identifier");
3404 = declare_label (c_parser_peek_token (parser
)->value
);
3405 C_DECLARED_LABEL_FLAG (label
) = 1;
3406 add_stmt (build_stmt (DECL_EXPR
, label
));
3407 c_parser_consume_token (parser
);
3408 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3409 c_parser_consume_token (parser
);
3413 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3415 /* ??? Locating this diagnostic on the token after the
3416 declarations end follows the old parser, but it might be
3417 better to locate it where the declarations start instead. */
3419 pedwarn ("ISO C forbids label declarations");
3421 /* We must now have at least one statement, label or declaration. */
3422 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3424 c_parser_error (parser
, "expected declaration or statement");
3425 c_parser_consume_token (parser
);
3428 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3430 location_t loc
= c_parser_peek_token (parser
)->location
;
3431 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3432 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3433 || (c_parser_next_token_is (parser
, CPP_NAME
)
3434 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3438 c_parser_label (parser
);
3440 else if (!last_label
3441 && c_parser_next_token_starts_declspecs (parser
))
3444 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3446 && ((pedantic
&& !flag_isoc99
)
3447 || warn_declaration_after_statement
))
3448 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3452 else if (!last_label
3453 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3455 /* __extension__ can start a declaration, but is also an
3456 unary operator that can start an expression. Consume all
3457 but the last of a possible series of __extension__ to
3459 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3460 && (c_parser_peek_2nd_token (parser
)->keyword
3462 c_parser_consume_token (parser
);
3463 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3466 ext
= disable_extension_diagnostics ();
3467 c_parser_consume_token (parser
);
3469 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3470 /* Following the old parser, __extension__ does not
3471 disable this diagnostic. */
3472 restore_extension_diagnostics (ext
);
3474 && ((pedantic
&& !flag_isoc99
)
3475 || warn_declaration_after_statement
))
3476 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3483 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3485 /* External pragmas, and some omp pragmas, are not associated
3486 with regular c code, and so are not to be considered statements
3487 syntactically. This ensures that the user doesn't put them
3488 places that would turn into syntax errors if the directive
3490 if (c_parser_pragma (parser
, pragma_compound
))
3491 last_label
= false, last_stmt
= true;
3493 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3495 c_parser_error (parser
, "expected declaration or statement");
3503 c_parser_statement_after_labels (parser
);
3506 parser
->error
= false;
3509 error ("label at end of compound statement");
3510 c_parser_consume_token (parser
);
3513 /* Parse a label (C90 6.6.1, C99 6.8.1).
3516 identifier : attributes[opt]
3517 case constant-expression :
3523 case constant-expression ... constant-expression :
3525 The use of attributes on labels is a GNU extension. The syntax in
3526 GNU C accepts any expressions without commas, non-constant
3527 expressions being rejected later. */
3530 c_parser_label (c_parser
*parser
)
3532 location_t loc1
= c_parser_peek_token (parser
)->location
;
3533 tree label
= NULL_TREE
;
3534 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3537 c_parser_consume_token (parser
);
3538 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3539 if (c_parser_next_token_is (parser
, CPP_COLON
))
3541 c_parser_consume_token (parser
);
3542 label
= do_case (exp1
, NULL_TREE
);
3544 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3546 c_parser_consume_token (parser
);
3547 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3548 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3549 label
= do_case (exp1
, exp2
);
3552 c_parser_error (parser
, "expected %<:%> or %<...%>");
3554 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3556 c_parser_consume_token (parser
);
3557 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3558 label
= do_case (NULL_TREE
, NULL_TREE
);
3562 tree name
= c_parser_peek_token (parser
)->value
;
3566 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3567 c_parser_consume_token (parser
);
3568 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3569 loc2
= c_parser_peek_token (parser
)->location
;
3570 c_parser_consume_token (parser
);
3571 attrs
= c_parser_attributes (parser
);
3572 tlab
= define_label (loc2
, name
);
3575 decl_attributes (&tlab
, attrs
, 0);
3576 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3580 SET_EXPR_LOCATION (label
, loc1
);
3583 /* Parse a statement (C90 6.6, C99 6.8).
3588 expression-statement
3596 expression-statement:
3599 selection-statement:
3603 iteration-statement:
3612 return expression[opt] ;
3625 objc-throw-statement
3626 objc-try-catch-statement
3627 objc-synchronized-statement
3629 objc-throw-statement:
3643 parallel-for-construct
3644 parallel-sections-construct
3651 parallel-directive structured-block
3654 for-directive iteration-statement
3657 sections-directive section-scope
3660 single-directive structured-block
3662 parallel-for-construct:
3663 parallel-for-directive iteration-statement
3665 parallel-sections-construct:
3666 parallel-sections-directive section-scope
3669 master-directive structured-block
3672 critical-directive structured-block
3675 atomic-directive expression-statement
3678 ordered-directive structured-block */
3681 c_parser_statement (c_parser
*parser
)
3683 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3684 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3685 || (c_parser_next_token_is (parser
, CPP_NAME
)
3686 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3687 c_parser_label (parser
);
3688 c_parser_statement_after_labels (parser
);
3691 /* Parse a statement, other than a labeled statement. */
3694 c_parser_statement_after_labels (c_parser
*parser
)
3696 location_t loc
= c_parser_peek_token (parser
)->location
;
3697 tree stmt
= NULL_TREE
;
3698 switch (c_parser_peek_token (parser
)->type
)
3700 case CPP_OPEN_BRACE
:
3701 add_stmt (c_parser_compound_statement (parser
));
3704 switch (c_parser_peek_token (parser
)->keyword
)
3707 c_parser_if_statement (parser
);
3710 c_parser_switch_statement (parser
);
3713 c_parser_while_statement (parser
);
3716 c_parser_do_statement (parser
);
3719 c_parser_for_statement (parser
);
3722 c_parser_consume_token (parser
);
3723 if (c_parser_next_token_is (parser
, CPP_NAME
))
3725 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3726 c_parser_consume_token (parser
);
3728 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3730 c_parser_consume_token (parser
);
3731 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3734 c_parser_error (parser
, "expected identifier or %<*%>");
3735 goto expect_semicolon
;
3737 c_parser_consume_token (parser
);
3738 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3739 goto expect_semicolon
;
3741 c_parser_consume_token (parser
);
3742 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3743 goto expect_semicolon
;
3745 c_parser_consume_token (parser
);
3746 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3748 stmt
= c_finish_return (NULL_TREE
);
3749 c_parser_consume_token (parser
);
3753 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3754 goto expect_semicolon
;
3758 stmt
= c_parser_asm_statement (parser
);
3761 gcc_assert (c_dialect_objc ());
3762 c_parser_consume_token (parser
);
3763 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3765 stmt
= objc_build_throw_stmt (NULL_TREE
);
3766 c_parser_consume_token (parser
);
3771 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3772 goto expect_semicolon
;
3776 gcc_assert (c_dialect_objc ());
3777 c_parser_objc_try_catch_statement (parser
);
3779 case RID_AT_SYNCHRONIZED
:
3780 gcc_assert (c_dialect_objc ());
3781 c_parser_objc_synchronized_statement (parser
);
3788 c_parser_consume_token (parser
);
3790 case CPP_CLOSE_PAREN
:
3791 case CPP_CLOSE_SQUARE
:
3792 /* Avoid infinite loop in error recovery:
3793 c_parser_skip_until_found stops at a closing nesting
3794 delimiter without consuming it, but here we need to consume
3795 it to proceed further. */
3796 c_parser_error (parser
, "expected statement");
3797 c_parser_consume_token (parser
);
3800 c_parser_pragma (parser
, pragma_stmt
);
3804 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3806 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3809 /* Two cases cannot and do not have line numbers associated: If stmt
3810 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3811 cannot hold line numbers. But that's OK because the statement
3812 will either be changed to a MODIFY_EXPR during gimplification of
3813 the statement expr, or discarded. If stmt was compound, but
3814 without new variables, we will have skipped the creation of a
3815 BIND and will have a bare STATEMENT_LIST. But that's OK because
3816 (recursively) all of the component statements should already have
3817 line numbers assigned. ??? Can we discard no-op statements
3819 if (stmt
&& EXPR_P (stmt
))
3820 SET_EXPR_LOCATION (stmt
, loc
);
3823 /* Parse a parenthesized condition from an if, do or while statement.
3829 c_parser_paren_condition (c_parser
*parser
)
3833 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3834 return error_mark_node
;
3835 loc
= c_parser_peek_token (parser
)->location
;
3836 cond
= c_objc_common_truthvalue_conversion
3837 (c_parser_expression_conv (parser
).value
);
3839 SET_EXPR_LOCATION (cond
, loc
);
3840 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3844 /* Parse a statement which is a block in C99. */
3847 c_parser_c99_block_statement (c_parser
*parser
)
3849 tree block
= c_begin_compound_stmt (flag_isoc99
);
3850 c_parser_statement (parser
);
3851 return c_end_compound_stmt (block
, flag_isoc99
);
3854 /* Parse the body of an if statement or the else half thereof. This
3855 is just parsing a statement but (a) it is a block in C99, (b) we
3856 track whether the body is an if statement for the sake of
3857 -Wparentheses warnings, (c) we handle an empty body specially for
3858 the sake of -Wextra warnings. */
3861 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3863 tree block
= c_begin_compound_stmt (flag_isoc99
);
3864 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3865 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3866 || (c_parser_next_token_is (parser
, CPP_NAME
)
3867 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3868 c_parser_label (parser
);
3869 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3870 if (extra_warnings
&& c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3871 add_stmt (build_empty_stmt ());
3872 c_parser_statement_after_labels (parser
);
3873 return c_end_compound_stmt (block
, flag_isoc99
);
3876 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3879 if ( expression ) statement
3880 if ( expression ) statement else statement
3884 c_parser_if_statement (c_parser
*parser
)
3889 bool first_if
= false, second_if
= false;
3890 tree first_body
, second_body
;
3891 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3892 c_parser_consume_token (parser
);
3893 block
= c_begin_compound_stmt (flag_isoc99
);
3894 loc
= c_parser_peek_token (parser
)->location
;
3895 cond
= c_parser_paren_condition (parser
);
3896 first_body
= c_parser_if_body (parser
, &first_if
);
3897 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3899 c_parser_consume_token (parser
);
3900 second_body
= c_parser_if_body (parser
, &second_if
);
3903 second_body
= NULL_TREE
;
3904 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3905 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3908 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3911 switch (expression) statement
3915 c_parser_switch_statement (c_parser
*parser
)
3917 tree block
, expr
, body
, save_break
;
3918 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3919 c_parser_consume_token (parser
);
3920 block
= c_begin_compound_stmt (flag_isoc99
);
3921 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3923 expr
= c_parser_expression (parser
).value
;
3924 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3927 expr
= error_mark_node
;
3928 c_start_case (expr
);
3929 save_break
= c_break_label
;
3930 c_break_label
= NULL_TREE
;
3931 body
= c_parser_c99_block_statement (parser
);
3932 c_finish_case (body
);
3934 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3935 c_break_label
= save_break
;
3936 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3939 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3942 while (expression) statement
3946 c_parser_while_statement (c_parser
*parser
)
3948 tree block
, cond
, body
, save_break
, save_cont
;
3950 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3951 c_parser_consume_token (parser
);
3952 block
= c_begin_compound_stmt (flag_isoc99
);
3953 loc
= c_parser_peek_token (parser
)->location
;
3954 cond
= c_parser_paren_condition (parser
);
3955 save_break
= c_break_label
;
3956 c_break_label
= NULL_TREE
;
3957 save_cont
= c_cont_label
;
3958 c_cont_label
= NULL_TREE
;
3959 body
= c_parser_c99_block_statement (parser
);
3960 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3961 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3962 c_break_label
= save_break
;
3963 c_cont_label
= save_cont
;
3966 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3969 do statement while ( expression ) ;
3973 c_parser_do_statement (c_parser
*parser
)
3975 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
3977 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
3978 c_parser_consume_token (parser
);
3979 block
= c_begin_compound_stmt (flag_isoc99
);
3980 loc
= c_parser_peek_token (parser
)->location
;
3981 save_break
= c_break_label
;
3982 c_break_label
= NULL_TREE
;
3983 save_cont
= c_cont_label
;
3984 c_cont_label
= NULL_TREE
;
3985 body
= c_parser_c99_block_statement (parser
);
3986 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
3987 new_break
= c_break_label
;
3988 c_break_label
= save_break
;
3989 new_cont
= c_cont_label
;
3990 c_cont_label
= save_cont
;
3991 cond
= c_parser_paren_condition (parser
);
3992 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
3993 c_parser_skip_to_end_of_block_or_statement (parser
);
3994 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
3995 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3998 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
4001 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
4002 for ( nested-declaration expression[opt] ; expression[opt] ) statement
4004 The form with a declaration is new in C99.
4006 ??? In accordance with the old parser, the declaration may be a
4007 nested function, which is then rejected in check_for_loop_decls,
4008 but does it make any sense for this to be included in the grammar?
4009 Note in particular that the nested function does not include a
4010 trailing ';', whereas the "declaration" production includes one.
4011 Also, can we reject bad declarations earlier and cheaper than
4012 check_for_loop_decls? */
4015 c_parser_for_statement (c_parser
*parser
)
4017 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4019 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4020 loc
= c_parser_peek_token (parser
)->location
;
4021 c_parser_consume_token (parser
);
4022 block
= c_begin_compound_stmt (flag_isoc99
);
4023 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4025 /* Parse the initialization declaration or expression. */
4026 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4028 c_parser_consume_token (parser
);
4029 c_finish_expr_stmt (NULL_TREE
);
4031 else if (c_parser_next_token_starts_declspecs (parser
))
4033 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4034 check_for_loop_decls ();
4036 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4038 /* __extension__ can start a declaration, but is also an
4039 unary operator that can start an expression. Consume all
4040 but the last of a possible series of __extension__ to
4042 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4043 && (c_parser_peek_2nd_token (parser
)->keyword
4045 c_parser_consume_token (parser
);
4046 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4049 ext
= disable_extension_diagnostics ();
4050 c_parser_consume_token (parser
);
4051 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4052 restore_extension_diagnostics (ext
);
4053 check_for_loop_decls ();
4061 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4062 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4064 /* Parse the loop condition. */
4065 loc
= c_parser_peek_token (parser
)->location
;
4066 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4068 c_parser_consume_token (parser
);
4073 tree ocond
= c_parser_expression_conv (parser
).value
;
4074 cond
= c_objc_common_truthvalue_conversion (ocond
);
4076 SET_EXPR_LOCATION (cond
, loc
);
4077 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4079 /* Parse the increment expression. */
4080 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4081 incr
= c_process_expr_stmt (NULL_TREE
);
4083 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4084 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4088 cond
= error_mark_node
;
4089 incr
= error_mark_node
;
4091 save_break
= c_break_label
;
4092 c_break_label
= NULL_TREE
;
4093 save_cont
= c_cont_label
;
4094 c_cont_label
= NULL_TREE
;
4095 body
= c_parser_c99_block_statement (parser
);
4096 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4097 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4098 c_break_label
= save_break
;
4099 c_cont_label
= save_cont
;
4102 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4103 statement with inputs, outputs, clobbers, and volatile tag
4107 asm type-qualifier[opt] ( asm-argument ) ;
4111 asm-string-literal : asm-operands[opt]
4112 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4113 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4115 Qualifiers other than volatile are accepted in the syntax but
4119 c_parser_asm_statement (c_parser
*parser
)
4121 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4123 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4124 c_parser_consume_token (parser
);
4125 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4127 quals
= c_parser_peek_token (parser
)->value
;
4128 c_parser_consume_token (parser
);
4130 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4131 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4133 warning (0, "%E qualifier ignored on asm",
4134 c_parser_peek_token (parser
)->value
);
4136 c_parser_consume_token (parser
);
4140 /* ??? Follow the C++ parser rather than using the
4141 c_lex_string_translate kludge. */
4142 c_lex_string_translate
= 0;
4143 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4145 c_lex_string_translate
= 1;
4148 str
= c_parser_asm_string_literal (parser
);
4149 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4152 outputs
= NULL_TREE
;
4154 clobbers
= NULL_TREE
;
4157 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4159 c_lex_string_translate
= 1;
4160 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4164 /* Parse outputs. */
4165 if (c_parser_next_token_is (parser
, CPP_COLON
)
4166 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4167 outputs
= NULL_TREE
;
4169 outputs
= c_parser_asm_operands (parser
, false);
4170 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4173 clobbers
= NULL_TREE
;
4176 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4178 c_lex_string_translate
= 1;
4179 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4183 if (c_parser_next_token_is (parser
, CPP_COLON
)
4184 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4187 inputs
= c_parser_asm_operands (parser
, true);
4188 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4190 clobbers
= NULL_TREE
;
4193 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4195 c_lex_string_translate
= 1;
4196 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4199 /* Parse clobbers. */
4200 clobbers
= c_parser_asm_clobbers (parser
);
4202 c_lex_string_translate
= 1;
4203 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4205 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4208 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4209 c_parser_skip_to_end_of_block_or_statement (parser
);
4210 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4215 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4216 not outputs), apply the default conversion of functions and arrays
4221 asm-operands , asm-operand
4224 asm-string-literal ( expression )
4225 [ identifier ] asm-string-literal ( expression )
4229 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4231 tree list
= NULL_TREE
;
4236 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4238 c_parser_consume_token (parser
);
4239 if (c_parser_next_token_is (parser
, CPP_NAME
))
4241 tree id
= c_parser_peek_token (parser
)->value
;
4242 c_parser_consume_token (parser
);
4243 name
= build_string (IDENTIFIER_LENGTH (id
),
4244 IDENTIFIER_POINTER (id
));
4248 c_parser_error (parser
, "expected identifier");
4249 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4252 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4257 str
= c_parser_asm_string_literal (parser
);
4258 if (str
== NULL_TREE
)
4260 c_lex_string_translate
= 1;
4261 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4263 c_lex_string_translate
= 0;
4266 expr
= c_parser_expression (parser
);
4268 expr
= default_function_array_conversion (expr
);
4269 c_lex_string_translate
= 0;
4270 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4272 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4275 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4277 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4278 c_parser_consume_token (parser
);
4285 /* Parse asm clobbers, a GNU extension.
4289 asm-clobbers , asm-string-literal
4293 c_parser_asm_clobbers (c_parser
*parser
)
4295 tree list
= NULL_TREE
;
4298 tree str
= c_parser_asm_string_literal (parser
);
4300 list
= tree_cons (NULL_TREE
, str
, list
);
4303 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4304 c_parser_consume_token (parser
);
4311 /* Parse an expression other than a compound expression; that is, an
4312 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4313 NULL then it is an Objective-C message expression which is the
4314 primary-expression starting the expression as an initializer.
4316 assignment-expression:
4317 conditional-expression
4318 unary-expression assignment-operator assignment-expression
4320 assignment-operator: one of
4321 = *= /= %= += -= <<= >>= &= ^= |=
4323 In GNU C we accept any conditional expression on the LHS and
4324 diagnose the invalid lvalue rather than producing a syntax
4327 static struct c_expr
4328 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4330 struct c_expr lhs
, rhs
, ret
;
4331 enum tree_code code
;
4332 gcc_assert (!after
|| c_dialect_objc ());
4333 lhs
= c_parser_conditional_expression (parser
, after
);
4334 switch (c_parser_peek_token (parser
)->type
)
4343 code
= TRUNC_DIV_EXPR
;
4346 code
= TRUNC_MOD_EXPR
;
4361 code
= BIT_AND_EXPR
;
4364 code
= BIT_XOR_EXPR
;
4367 code
= BIT_IOR_EXPR
;
4372 c_parser_consume_token (parser
);
4373 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4374 rhs
= default_function_array_conversion (rhs
);
4375 ret
.value
= build_modify_expr (lhs
.value
, code
, rhs
.value
);
4376 if (code
== NOP_EXPR
)
4377 ret
.original_code
= MODIFY_EXPR
;
4380 TREE_NO_WARNING (ret
.value
) = 1;
4381 ret
.original_code
= ERROR_MARK
;
4386 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4387 is not NULL then it is an Objective-C message expression which is
4388 the primary-expression starting the expression as an initializer.
4390 conditional-expression:
4391 logical-OR-expression
4392 logical-OR-expression ? expression : conditional-expression
4396 conditional-expression:
4397 logical-OR-expression ? : conditional-expression
4400 static struct c_expr
4401 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4403 struct c_expr cond
, exp1
, exp2
, ret
;
4404 gcc_assert (!after
|| c_dialect_objc ());
4405 cond
= c_parser_binary_expression (parser
, after
);
4406 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4408 cond
= default_function_array_conversion (cond
);
4409 c_parser_consume_token (parser
);
4410 if (c_parser_next_token_is (parser
, CPP_COLON
))
4413 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
4414 /* Make sure first operand is calculated only once. */
4415 exp1
.value
= save_expr (default_conversion (cond
.value
));
4416 cond
.value
= c_objc_common_truthvalue_conversion (exp1
.value
);
4417 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4422 = c_objc_common_truthvalue_conversion
4423 (default_conversion (cond
.value
));
4424 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4425 exp1
= c_parser_expression_conv (parser
);
4426 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4427 - (cond
.value
== truthvalue_false_node
));
4429 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4431 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4432 ret
.value
= error_mark_node
;
4433 ret
.original_code
= ERROR_MARK
;
4436 exp2
= c_parser_conditional_expression (parser
, NULL
);
4437 exp2
= default_function_array_conversion (exp2
);
4438 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4439 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4440 ret
.original_code
= ERROR_MARK
;
4444 /* Parse a binary expression; that is, a logical-OR-expression (C90
4445 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4446 an Objective-C message expression which is the primary-expression
4447 starting the expression as an initializer.
4449 multiplicative-expression:
4451 multiplicative-expression * cast-expression
4452 multiplicative-expression / cast-expression
4453 multiplicative-expression % cast-expression
4455 additive-expression:
4456 multiplicative-expression
4457 additive-expression + multiplicative-expression
4458 additive-expression - multiplicative-expression
4462 shift-expression << additive-expression
4463 shift-expression >> additive-expression
4465 relational-expression:
4467 relational-expression < shift-expression
4468 relational-expression > shift-expression
4469 relational-expression <= shift-expression
4470 relational-expression >= shift-expression
4472 equality-expression:
4473 relational-expression
4474 equality-expression == relational-expression
4475 equality-expression != relational-expression
4479 AND-expression & equality-expression
4481 exclusive-OR-expression:
4483 exclusive-OR-expression ^ AND-expression
4485 inclusive-OR-expression:
4486 exclusive-OR-expression
4487 inclusive-OR-expression | exclusive-OR-expression
4489 logical-AND-expression:
4490 inclusive-OR-expression
4491 logical-AND-expression && inclusive-OR-expression
4493 logical-OR-expression:
4494 logical-AND-expression
4495 logical-OR-expression || logical-AND-expression
4498 static struct c_expr
4499 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4501 /* A binary expression is parsed using operator-precedence parsing,
4502 with the operands being cast expressions. All the binary
4503 operators are left-associative. Thus a binary expression is of
4506 E0 op1 E1 op2 E2 ...
4508 which we represent on a stack. On the stack, the precedence
4509 levels are strictly increasing. When a new operator is
4510 encountered of higher precedence than that at the top of the
4511 stack, it is pushed; its LHS is the top expression, and its RHS
4512 is everything parsed until it is popped. When a new operator is
4513 encountered with precedence less than or equal to that at the top
4514 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4515 by the result of the operation until the operator at the top of
4516 the stack has lower precedence than the new operator or there is
4517 only one element on the stack; then the top expression is the LHS
4518 of the new operator. In the case of logical AND and OR
4519 expressions, we also need to adjust skip_evaluation as
4520 appropriate when the operators are pushed and popped. */
4522 /* The precedence levels, where 0 is a dummy lowest level used for
4523 the bottom of the stack. */
4539 /* The expression at this stack level. */
4541 /* The precedence of the operator on its left, PREC_NONE at the
4542 bottom of the stack. */
4544 /* The operation on its left. */
4550 switch (stack[sp].op) \
4552 case TRUTH_ANDIF_EXPR: \
4553 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4555 case TRUTH_ORIF_EXPR: \
4556 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4561 stack[sp - 1].expr \
4562 = default_function_array_conversion (stack[sp - 1].expr); \
4564 = default_function_array_conversion (stack[sp].expr); \
4565 stack[sp - 1].expr = parser_build_binary_op (stack[sp].op, \
4566 stack[sp - 1].expr, \
4570 gcc_assert (!after
|| c_dialect_objc ());
4571 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4572 stack
[0].prec
= PREC_NONE
;
4577 enum tree_code ocode
;
4580 switch (c_parser_peek_token (parser
)->type
)
4588 ocode
= TRUNC_DIV_EXPR
;
4592 ocode
= TRUNC_MOD_EXPR
;
4604 ocode
= LSHIFT_EXPR
;
4608 ocode
= RSHIFT_EXPR
;
4622 case CPP_GREATER_EQ
:
4635 oprec
= PREC_BITAND
;
4636 ocode
= BIT_AND_EXPR
;
4639 oprec
= PREC_BITXOR
;
4640 ocode
= BIT_XOR_EXPR
;
4644 ocode
= BIT_IOR_EXPR
;
4647 oprec
= PREC_LOGAND
;
4648 ocode
= TRUTH_ANDIF_EXPR
;
4652 ocode
= TRUTH_ORIF_EXPR
;
4655 /* Not a binary operator, so end of the binary
4659 c_parser_consume_token (parser
);
4660 while (oprec
<= stack
[sp
].prec
)
4664 case TRUTH_ANDIF_EXPR
:
4666 = default_function_array_conversion (stack
[sp
].expr
);
4667 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4668 (default_conversion (stack
[sp
].expr
.value
));
4669 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4671 case TRUTH_ORIF_EXPR
:
4673 = default_function_array_conversion (stack
[sp
].expr
);
4674 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4675 (default_conversion (stack
[sp
].expr
.value
));
4676 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4682 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4683 stack
[sp
].prec
= oprec
;
4684 stack
[sp
].op
= ocode
;
4689 return stack
[0].expr
;
4693 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4694 NULL then it is an Objective-C message expression which is the
4695 primary-expression starting the expression as an initializer.
4699 ( type-name ) unary-expression
4702 static struct c_expr
4703 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4705 gcc_assert (!after
|| c_dialect_objc ());
4707 return c_parser_postfix_expression_after_primary (parser
, *after
);
4708 /* If the expression begins with a parenthesized type name, it may
4709 be either a cast or a compound literal; we need to see whether
4710 the next character is '{' to tell the difference. If not, it is
4711 an unary expression. */
4712 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4713 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4715 struct c_type_name
*type_name
;
4718 c_parser_consume_token (parser
);
4719 type_name
= c_parser_type_name (parser
);
4720 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4721 if (type_name
== NULL
)
4723 ret
.value
= error_mark_node
;
4724 ret
.original_code
= ERROR_MARK
;
4728 /* Save casted types in the function's used types hash table. */
4729 used_types_insert (type_name
->specs
->type
);
4731 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4732 return c_parser_postfix_expression_after_paren_type (parser
,
4734 expr
= c_parser_cast_expression (parser
, NULL
);
4735 expr
= default_function_array_conversion (expr
);
4736 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4737 ret
.original_code
= ERROR_MARK
;
4741 return c_parser_unary_expression (parser
);
4744 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4750 unary-operator cast-expression
4751 sizeof unary-expression
4752 sizeof ( type-name )
4754 unary-operator: one of
4760 __alignof__ unary-expression
4761 __alignof__ ( type-name )
4764 unary-operator: one of
4765 __extension__ __real__ __imag__
4767 In addition, the GNU syntax treats ++ and -- as unary operators, so
4768 they may be applied to cast expressions with errors for non-lvalues
4771 static struct c_expr
4772 c_parser_unary_expression (c_parser
*parser
)
4775 struct c_expr ret
, op
;
4776 switch (c_parser_peek_token (parser
)->type
)
4779 c_parser_consume_token (parser
);
4780 op
= c_parser_cast_expression (parser
, NULL
);
4781 op
= default_function_array_conversion (op
);
4782 return parser_build_unary_op (PREINCREMENT_EXPR
, op
);
4783 case CPP_MINUS_MINUS
:
4784 c_parser_consume_token (parser
);
4785 op
= c_parser_cast_expression (parser
, NULL
);
4786 op
= default_function_array_conversion (op
);
4787 return parser_build_unary_op (PREDECREMENT_EXPR
, op
);
4789 c_parser_consume_token (parser
);
4790 return parser_build_unary_op (ADDR_EXPR
,
4791 c_parser_cast_expression (parser
, NULL
));
4793 c_parser_consume_token (parser
);
4794 op
= c_parser_cast_expression (parser
, NULL
);
4795 op
= default_function_array_conversion (op
);
4796 ret
.value
= build_indirect_ref (op
.value
, "unary *");
4797 ret
.original_code
= ERROR_MARK
;
4800 c_parser_consume_token (parser
);
4801 if (!c_dialect_objc () && !in_system_header
)
4802 warning (OPT_Wtraditional
,
4803 "traditional C rejects the unary plus operator");
4804 op
= c_parser_cast_expression (parser
, NULL
);
4805 op
= default_function_array_conversion (op
);
4806 return parser_build_unary_op (CONVERT_EXPR
, op
);
4808 c_parser_consume_token (parser
);
4809 op
= c_parser_cast_expression (parser
, NULL
);
4810 op
= default_function_array_conversion (op
);
4811 return parser_build_unary_op (NEGATE_EXPR
, op
);
4813 c_parser_consume_token (parser
);
4814 op
= c_parser_cast_expression (parser
, NULL
);
4815 op
= default_function_array_conversion (op
);
4816 return parser_build_unary_op (BIT_NOT_EXPR
, op
);
4818 c_parser_consume_token (parser
);
4819 op
= c_parser_cast_expression (parser
, NULL
);
4820 op
= default_function_array_conversion (op
);
4821 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
);
4823 /* Refer to the address of a label as a pointer. */
4824 c_parser_consume_token (parser
);
4825 if (c_parser_next_token_is (parser
, CPP_NAME
))
4827 ret
.value
= finish_label_address_expr
4828 (c_parser_peek_token (parser
)->value
);
4829 c_parser_consume_token (parser
);
4833 c_parser_error (parser
, "expected identifier");
4834 ret
.value
= error_mark_node
;
4836 ret
.original_code
= ERROR_MARK
;
4839 switch (c_parser_peek_token (parser
)->keyword
)
4842 return c_parser_sizeof_expression (parser
);
4844 return c_parser_alignof_expression (parser
);
4846 c_parser_consume_token (parser
);
4847 ext
= disable_extension_diagnostics ();
4848 ret
= c_parser_cast_expression (parser
, NULL
);
4849 restore_extension_diagnostics (ext
);
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 (REALPART_EXPR
, op
);
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 (IMAGPART_EXPR
, op
);
4862 return c_parser_postfix_expression (parser
);
4865 return c_parser_postfix_expression (parser
);
4869 /* Parse a sizeof expression. */
4871 static struct c_expr
4872 c_parser_sizeof_expression (c_parser
*parser
)
4875 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4876 c_parser_consume_token (parser
);
4879 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4880 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4882 /* Either sizeof ( type-name ) or sizeof unary-expression
4883 starting with a compound literal. */
4884 struct c_type_name
*type_name
;
4885 c_parser_consume_token (parser
);
4886 type_name
= c_parser_type_name (parser
);
4887 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4888 if (type_name
== NULL
)
4893 ret
.value
= error_mark_node
;
4894 ret
.original_code
= ERROR_MARK
;
4897 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4899 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4903 /* sizeof ( type-name ). */
4906 if (type_name
->declarator
->kind
== cdk_array
4907 && type_name
->declarator
->u
.array
.vla_unspec_p
)
4910 error ("%<[*]%> not allowed in other than a declaration");
4912 return c_expr_sizeof_type (type_name
);
4916 expr
= c_parser_unary_expression (parser
);
4920 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4921 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4922 error ("%<sizeof%> applied to a bit-field");
4923 return c_expr_sizeof_expr (expr
);
4927 /* Parse an alignof expression. */
4929 static struct c_expr
4930 c_parser_alignof_expression (c_parser
*parser
)
4933 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4934 c_parser_consume_token (parser
);
4937 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4938 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4940 /* Either __alignof__ ( type-name ) or __alignof__
4941 unary-expression starting with a compound literal. */
4942 struct c_type_name
*type_name
;
4944 c_parser_consume_token (parser
);
4945 type_name
= c_parser_type_name (parser
);
4946 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4947 if (type_name
== NULL
)
4952 ret
.value
= error_mark_node
;
4953 ret
.original_code
= ERROR_MARK
;
4956 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4958 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4962 /* alignof ( type-name ). */
4965 ret
.value
= c_alignof (groktypename (type_name
));
4966 ret
.original_code
= ERROR_MARK
;
4972 expr
= c_parser_unary_expression (parser
);
4976 ret
.value
= c_alignof_expr (expr
.value
);
4977 ret
.original_code
= ERROR_MARK
;
4982 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4986 postfix-expression [ expression ]
4987 postfix-expression ( argument-expression-list[opt] )
4988 postfix-expression . identifier
4989 postfix-expression -> identifier
4990 postfix-expression ++
4991 postfix-expression --
4992 ( type-name ) { initializer-list }
4993 ( type-name ) { initializer-list , }
4995 argument-expression-list:
4997 argument-expression-list , argument-expression
5009 (treated as a keyword in GNU C)
5012 ( compound-statement )
5013 __builtin_va_arg ( assignment-expression , type-name )
5014 __builtin_offsetof ( type-name , offsetof-member-designator )
5015 __builtin_choose_expr ( assignment-expression ,
5016 assignment-expression ,
5017 assignment-expression )
5018 __builtin_types_compatible_p ( type-name , type-name )
5020 offsetof-member-designator:
5022 offsetof-member-designator . identifier
5023 offsetof-member-designator [ expression ]
5028 [ objc-receiver objc-message-args ]
5029 @selector ( objc-selector-arg )
5030 @protocol ( identifier )
5031 @encode ( type-name )
5035 static struct c_expr
5036 c_parser_postfix_expression (c_parser
*parser
)
5038 struct c_expr expr
, e1
, e2
, e3
;
5039 struct c_type_name
*t1
, *t2
;
5040 switch (c_parser_peek_token (parser
)->type
)
5045 expr
.value
= c_parser_peek_token (parser
)->value
;
5046 expr
.original_code
= ERROR_MARK
;
5047 c_parser_consume_token (parser
);
5051 expr
.value
= c_parser_peek_token (parser
)->value
;
5052 expr
.original_code
= STRING_CST
;
5053 c_parser_consume_token (parser
);
5055 case CPP_OBJC_STRING
:
5056 gcc_assert (c_dialect_objc ());
5058 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5059 expr
.original_code
= ERROR_MARK
;
5060 c_parser_consume_token (parser
);
5063 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5065 c_parser_error (parser
, "expected expression");
5066 expr
.value
= error_mark_node
;
5067 expr
.original_code
= ERROR_MARK
;
5071 tree id
= c_parser_peek_token (parser
)->value
;
5072 location_t loc
= c_parser_peek_token (parser
)->location
;
5073 c_parser_consume_token (parser
);
5074 expr
.value
= build_external_ref (id
,
5075 (c_parser_peek_token (parser
)->type
5076 == CPP_OPEN_PAREN
), loc
);
5077 expr
.original_code
= ERROR_MARK
;
5080 case CPP_OPEN_PAREN
:
5081 /* A parenthesized expression, statement expression or compound
5083 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5085 /* A statement expression. */
5087 c_parser_consume_token (parser
);
5088 c_parser_consume_token (parser
);
5089 if (cur_stmt_list
== NULL
)
5091 error ("braced-group within expression allowed "
5092 "only inside a function");
5093 parser
->error
= true;
5094 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5095 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5096 expr
.value
= error_mark_node
;
5097 expr
.original_code
= ERROR_MARK
;
5100 stmt
= c_begin_stmt_expr ();
5101 c_parser_compound_statement_nostart (parser
);
5102 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5105 pedwarn ("ISO C forbids braced-groups within expressions");
5106 expr
.value
= c_finish_stmt_expr (stmt
);
5107 expr
.original_code
= ERROR_MARK
;
5109 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5111 /* A compound literal. ??? Can we actually get here rather
5112 than going directly to
5113 c_parser_postfix_expression_after_paren_type from
5115 struct c_type_name
*type_name
;
5116 c_parser_consume_token (parser
);
5117 type_name
= c_parser_type_name (parser
);
5118 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5120 if (type_name
== NULL
)
5122 expr
.value
= error_mark_node
;
5123 expr
.original_code
= ERROR_MARK
;
5126 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5131 /* A parenthesized expression. */
5132 c_parser_consume_token (parser
);
5133 expr
= c_parser_expression (parser
);
5134 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5135 TREE_NO_WARNING (expr
.value
) = 1;
5136 expr
.original_code
= ERROR_MARK
;
5137 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5142 switch (c_parser_peek_token (parser
)->keyword
)
5144 case RID_FUNCTION_NAME
:
5145 case RID_PRETTY_FUNCTION_NAME
:
5146 case RID_C99_FUNCTION_NAME
:
5147 expr
.value
= fname_decl (c_parser_peek_token (parser
)->keyword
,
5148 c_parser_peek_token (parser
)->value
);
5149 expr
.original_code
= ERROR_MARK
;
5150 c_parser_consume_token (parser
);
5153 c_parser_consume_token (parser
);
5154 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5156 expr
.value
= error_mark_node
;
5157 expr
.original_code
= ERROR_MARK
;
5160 e1
= c_parser_expr_no_commas (parser
, NULL
);
5161 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5163 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5164 expr
.value
= error_mark_node
;
5165 expr
.original_code
= ERROR_MARK
;
5168 t1
= c_parser_type_name (parser
);
5169 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5173 expr
.value
= error_mark_node
;
5174 expr
.original_code
= ERROR_MARK
;
5178 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5179 expr
.original_code
= ERROR_MARK
;
5183 c_parser_consume_token (parser
);
5184 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5186 expr
.value
= error_mark_node
;
5187 expr
.original_code
= ERROR_MARK
;
5190 t1
= c_parser_type_name (parser
);
5193 expr
.value
= error_mark_node
;
5194 expr
.original_code
= ERROR_MARK
;
5197 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5199 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5200 expr
.value
= error_mark_node
;
5201 expr
.original_code
= ERROR_MARK
;
5205 tree type
= groktypename (t1
);
5207 if (type
== error_mark_node
)
5208 offsetof_ref
= error_mark_node
;
5210 offsetof_ref
= build1 (INDIRECT_REF
, type
, null_pointer_node
);
5211 /* Parse the second argument to __builtin_offsetof. We
5212 must have one identifier, and beyond that we want to
5213 accept sub structure and sub array references. */
5214 if (c_parser_next_token_is (parser
, CPP_NAME
))
5216 offsetof_ref
= build_component_ref
5217 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5218 c_parser_consume_token (parser
);
5219 while (c_parser_next_token_is (parser
, CPP_DOT
)
5220 || c_parser_next_token_is (parser
,
5223 if (c_parser_next_token_is (parser
, CPP_DOT
))
5225 c_parser_consume_token (parser
);
5226 if (c_parser_next_token_is_not (parser
,
5229 c_parser_error (parser
, "expected identifier");
5232 offsetof_ref
= build_component_ref
5234 c_parser_peek_token (parser
)->value
);
5235 c_parser_consume_token (parser
);
5240 c_parser_consume_token (parser
);
5241 idx
= c_parser_expression (parser
).value
;
5242 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5244 offsetof_ref
= build_array_ref (offsetof_ref
, idx
);
5249 c_parser_error (parser
, "expected identifier");
5250 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5252 expr
.value
= fold_offsetof (offsetof_ref
, NULL_TREE
);
5253 expr
.original_code
= ERROR_MARK
;
5256 case RID_CHOOSE_EXPR
:
5257 c_parser_consume_token (parser
);
5258 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5260 expr
.value
= error_mark_node
;
5261 expr
.original_code
= ERROR_MARK
;
5264 e1
= c_parser_expr_no_commas (parser
, NULL
);
5265 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5267 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5268 expr
.value
= error_mark_node
;
5269 expr
.original_code
= ERROR_MARK
;
5272 e2
= c_parser_expr_no_commas (parser
, NULL
);
5273 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5275 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5276 expr
.value
= error_mark_node
;
5277 expr
.original_code
= ERROR_MARK
;
5280 e3
= c_parser_expr_no_commas (parser
, NULL
);
5281 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5286 c
= fold (e1
.value
);
5287 if (TREE_CODE (c
) != INTEGER_CST
)
5288 error ("first argument to %<__builtin_choose_expr%> not"
5290 expr
= integer_zerop (c
) ? e3
: e2
;
5293 case RID_TYPES_COMPATIBLE_P
:
5294 c_parser_consume_token (parser
);
5295 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5297 expr
.value
= error_mark_node
;
5298 expr
.original_code
= ERROR_MARK
;
5301 t1
= c_parser_type_name (parser
);
5304 expr
.value
= error_mark_node
;
5305 expr
.original_code
= ERROR_MARK
;
5308 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5310 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5311 expr
.value
= error_mark_node
;
5312 expr
.original_code
= ERROR_MARK
;
5315 t2
= c_parser_type_name (parser
);
5318 expr
.value
= error_mark_node
;
5319 expr
.original_code
= ERROR_MARK
;
5322 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5327 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5328 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5330 expr
.value
= comptypes (e1
, e2
)
5331 ? build_int_cst (NULL_TREE
, 1)
5332 : build_int_cst (NULL_TREE
, 0);
5333 expr
.original_code
= ERROR_MARK
;
5336 case RID_AT_SELECTOR
:
5337 gcc_assert (c_dialect_objc ());
5338 c_parser_consume_token (parser
);
5339 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5341 expr
.value
= error_mark_node
;
5342 expr
.original_code
= ERROR_MARK
;
5346 tree sel
= c_parser_objc_selector_arg (parser
);
5347 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5349 expr
.value
= objc_build_selector_expr (sel
);
5350 expr
.original_code
= ERROR_MARK
;
5353 case RID_AT_PROTOCOL
:
5354 gcc_assert (c_dialect_objc ());
5355 c_parser_consume_token (parser
);
5356 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5358 expr
.value
= error_mark_node
;
5359 expr
.original_code
= ERROR_MARK
;
5362 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5364 c_parser_error (parser
, "expected identifier");
5365 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5366 expr
.value
= error_mark_node
;
5367 expr
.original_code
= ERROR_MARK
;
5371 tree id
= c_parser_peek_token (parser
)->value
;
5372 c_parser_consume_token (parser
);
5373 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5375 expr
.value
= objc_build_protocol_expr (id
);
5376 expr
.original_code
= ERROR_MARK
;
5380 /* Extension to support C-structures in the archiver. */
5381 gcc_assert (c_dialect_objc ());
5382 c_parser_consume_token (parser
);
5383 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5385 expr
.value
= error_mark_node
;
5386 expr
.original_code
= ERROR_MARK
;
5389 t1
= c_parser_type_name (parser
);
5392 expr
.value
= error_mark_node
;
5393 expr
.original_code
= ERROR_MARK
;
5394 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5397 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5400 tree type
= groktypename (t1
);
5401 expr
.value
= objc_build_encode_expr (type
);
5402 expr
.original_code
= ERROR_MARK
;
5406 c_parser_error (parser
, "expected expression");
5407 expr
.value
= error_mark_node
;
5408 expr
.original_code
= ERROR_MARK
;
5412 case CPP_OPEN_SQUARE
:
5413 if (c_dialect_objc ())
5415 tree receiver
, args
;
5416 c_parser_consume_token (parser
);
5417 receiver
= c_parser_objc_receiver (parser
);
5418 args
= c_parser_objc_message_args (parser
);
5419 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5421 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5423 expr
.original_code
= ERROR_MARK
;
5426 /* Else fall through to report error. */
5428 c_parser_error (parser
, "expected expression");
5429 expr
.value
= error_mark_node
;
5430 expr
.original_code
= ERROR_MARK
;
5433 return c_parser_postfix_expression_after_primary (parser
, expr
);
5436 /* Parse a postfix expression after a parenthesized type name: the
5437 brace-enclosed initializer of a compound literal, possibly followed
5438 by some postfix operators. This is separate because it is not
5439 possible to tell until after the type name whether a cast
5440 expression has a cast or a compound literal, or whether the operand
5441 of sizeof is a parenthesized type name or starts with a compound
5444 static struct c_expr
5445 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5446 struct c_type_name
*type_name
)
5451 start_init (NULL_TREE
, NULL
, 0);
5452 type
= groktypename (type_name
);
5453 if (type
!= error_mark_node
&& C_TYPE_VARIABLE_SIZE (type
))
5455 error ("compound literal has variable size");
5456 type
= error_mark_node
;
5458 init
= c_parser_braced_init (parser
, type
, false);
5460 maybe_warn_string_init (type
, init
);
5462 if (pedantic
&& !flag_isoc99
)
5463 pedwarn ("ISO C90 forbids compound literals");
5464 expr
.value
= build_compound_literal (type
, init
.value
);
5465 expr
.original_code
= ERROR_MARK
;
5466 return c_parser_postfix_expression_after_primary (parser
, expr
);
5469 /* Parse a postfix expression after the initial primary or compound
5470 literal; that is, parse a series of postfix operators. */
5472 static struct c_expr
5473 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5476 tree ident
, idx
, exprlist
;
5479 switch (c_parser_peek_token (parser
)->type
)
5481 case CPP_OPEN_SQUARE
:
5482 /* Array reference. */
5483 c_parser_consume_token (parser
);
5484 idx
= c_parser_expression (parser
).value
;
5485 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5487 expr
.value
= build_array_ref (expr
.value
, idx
);
5488 expr
.original_code
= ERROR_MARK
;
5490 case CPP_OPEN_PAREN
:
5491 /* Function call. */
5492 c_parser_consume_token (parser
);
5493 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5494 exprlist
= NULL_TREE
;
5496 exprlist
= c_parser_expr_list (parser
, true);
5497 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5499 expr
.value
= build_function_call (expr
.value
, exprlist
);
5500 expr
.original_code
= ERROR_MARK
;
5503 /* Structure element reference. */
5504 c_parser_consume_token (parser
);
5505 expr
= default_function_array_conversion (expr
);
5506 if (c_parser_next_token_is (parser
, CPP_NAME
))
5507 ident
= c_parser_peek_token (parser
)->value
;
5510 c_parser_error (parser
, "expected identifier");
5511 expr
.value
= error_mark_node
;
5512 expr
.original_code
= ERROR_MARK
;
5515 c_parser_consume_token (parser
);
5516 expr
.value
= build_component_ref (expr
.value
, ident
);
5517 expr
.original_code
= ERROR_MARK
;
5520 /* Structure element reference. */
5521 c_parser_consume_token (parser
);
5522 expr
= default_function_array_conversion (expr
);
5523 if (c_parser_next_token_is (parser
, CPP_NAME
))
5524 ident
= c_parser_peek_token (parser
)->value
;
5527 c_parser_error (parser
, "expected identifier");
5528 expr
.value
= error_mark_node
;
5529 expr
.original_code
= ERROR_MARK
;
5532 c_parser_consume_token (parser
);
5533 expr
.value
= build_component_ref (build_indirect_ref (expr
.value
,
5535 expr
.original_code
= ERROR_MARK
;
5538 /* Postincrement. */
5539 c_parser_consume_token (parser
);
5540 expr
= default_function_array_conversion (expr
);
5541 expr
.value
= build_unary_op (POSTINCREMENT_EXPR
, expr
.value
, 0);
5542 expr
.original_code
= ERROR_MARK
;
5544 case CPP_MINUS_MINUS
:
5545 /* Postdecrement. */
5546 c_parser_consume_token (parser
);
5547 expr
= default_function_array_conversion (expr
);
5548 expr
.value
= build_unary_op (POSTDECREMENT_EXPR
, expr
.value
, 0);
5549 expr
.original_code
= ERROR_MARK
;
5557 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5560 assignment-expression
5561 expression , assignment-expression
5564 static struct c_expr
5565 c_parser_expression (c_parser
*parser
)
5568 expr
= c_parser_expr_no_commas (parser
, NULL
);
5569 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5572 c_parser_consume_token (parser
);
5573 next
= c_parser_expr_no_commas (parser
, NULL
);
5574 next
= default_function_array_conversion (next
);
5575 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5576 expr
.original_code
= COMPOUND_EXPR
;
5581 /* Parse an expression and convert functions or arrays to
5584 static struct c_expr
5585 c_parser_expression_conv (c_parser
*parser
)
5588 expr
= c_parser_expression (parser
);
5589 expr
= default_function_array_conversion (expr
);
5593 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5594 functions and arrays to pointers.
5597 assignment-expression
5598 nonempty-expr-list , assignment-expression
5602 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5606 expr
= c_parser_expr_no_commas (parser
, NULL
);
5608 expr
= default_function_array_conversion (expr
);
5609 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5610 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5612 c_parser_consume_token (parser
);
5613 expr
= c_parser_expr_no_commas (parser
, NULL
);
5615 expr
= default_function_array_conversion (expr
);
5616 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5622 /* Parse Objective-C-specific constructs. */
5624 /* Parse an objc-class-definition.
5626 objc-class-definition:
5627 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5628 objc-class-instance-variables[opt] objc-methodprotolist @end
5629 @implementation identifier objc-superclass[opt]
5630 objc-class-instance-variables[opt]
5631 @interface identifier ( identifier ) objc-protocol-refs[opt]
5632 objc-methodprotolist @end
5633 @implementation identifier ( identifier )
5638 "@interface identifier (" must start "@interface identifier (
5639 identifier ) ...": objc-methodprotolist in the first production may
5640 not start with a parenthesized identifier as a declarator of a data
5641 definition with no declaration specifiers if the objc-superclass,
5642 objc-protocol-refs and objc-class-instance-variables are omitted. */
5645 c_parser_objc_class_definition (c_parser
*parser
)
5650 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5652 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5656 c_parser_consume_token (parser
);
5657 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5659 c_parser_error (parser
, "expected identifier");
5662 id1
= c_parser_peek_token (parser
)->value
;
5663 c_parser_consume_token (parser
);
5664 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5667 tree proto
= NULL_TREE
;
5668 c_parser_consume_token (parser
);
5669 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5671 c_parser_error (parser
, "expected identifier");
5672 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5675 id2
= c_parser_peek_token (parser
)->value
;
5676 c_parser_consume_token (parser
);
5677 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5680 objc_start_category_implementation (id1
, id2
);
5683 if (c_parser_next_token_is (parser
, CPP_LESS
))
5684 proto
= c_parser_objc_protocol_refs (parser
);
5685 objc_start_category_interface (id1
, id2
, proto
);
5686 c_parser_objc_methodprotolist (parser
);
5687 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5688 objc_finish_interface ();
5691 if (c_parser_next_token_is (parser
, CPP_COLON
))
5693 c_parser_consume_token (parser
);
5694 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5696 c_parser_error (parser
, "expected identifier");
5699 superclass
= c_parser_peek_token (parser
)->value
;
5700 c_parser_consume_token (parser
);
5703 superclass
= NULL_TREE
;
5706 tree proto
= NULL_TREE
;
5707 if (c_parser_next_token_is (parser
, CPP_LESS
))
5708 proto
= c_parser_objc_protocol_refs (parser
);
5709 objc_start_class_interface (id1
, superclass
, proto
);
5712 objc_start_class_implementation (id1
, superclass
);
5713 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5714 c_parser_objc_class_instance_variables (parser
);
5717 objc_continue_interface ();
5718 c_parser_objc_methodprotolist (parser
);
5719 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5720 objc_finish_interface ();
5724 objc_continue_implementation ();
5729 /* Parse objc-class-instance-variables.
5731 objc-class-instance-variables:
5732 { objc-instance-variable-decl-list[opt] }
5734 objc-instance-variable-decl-list:
5735 objc-visibility-spec
5736 objc-instance-variable-decl ;
5738 objc-instance-variable-decl-list objc-visibility-spec
5739 objc-instance-variable-decl-list objc-instance-variable-decl ;
5740 objc-instance-variable-decl-list ;
5742 objc-visibility-spec:
5747 objc-instance-variable-decl:
5752 c_parser_objc_class_instance_variables (c_parser
*parser
)
5754 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5755 c_parser_consume_token (parser
);
5756 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5759 /* Parse any stray semicolon. */
5760 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5763 pedwarn ("extra semicolon in struct or union specified");
5764 c_parser_consume_token (parser
);
5767 /* Stop if at the end of the instance variables. */
5768 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5770 c_parser_consume_token (parser
);
5773 /* Parse any objc-visibility-spec. */
5774 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
5776 c_parser_consume_token (parser
);
5777 objc_set_visibility (2);
5780 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
5782 c_parser_consume_token (parser
);
5783 objc_set_visibility (0);
5786 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
5788 c_parser_consume_token (parser
);
5789 objc_set_visibility (1);
5792 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5794 c_parser_pragma (parser
, pragma_external
);
5798 /* Parse some comma-separated declarations. */
5799 decls
= c_parser_struct_declaration (parser
);
5801 /* Comma-separated instance variables are chained together in
5802 reverse order; add them one by one. */
5803 tree ivar
= nreverse (decls
);
5804 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5805 objc_add_instance_variable (copy_node (ivar
));
5807 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5811 /* Parse an objc-class-declaration.
5813 objc-class-declaration:
5814 @class identifier-list ;
5818 c_parser_objc_class_declaration (c_parser
*parser
)
5820 tree list
= NULL_TREE
;
5821 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
5822 c_parser_consume_token (parser
);
5823 /* Any identifiers, including those declared as type names, are OK
5828 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5830 c_parser_error (parser
, "expected identifier");
5833 id
= c_parser_peek_token (parser
)->value
;
5834 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5835 c_parser_consume_token (parser
);
5836 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5837 c_parser_consume_token (parser
);
5841 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5842 objc_declare_class (list
);
5845 /* Parse an objc-alias-declaration.
5847 objc-alias-declaration:
5848 @compatibility_alias identifier identifier ;
5852 c_parser_objc_alias_declaration (c_parser
*parser
)
5855 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5856 c_parser_consume_token (parser
);
5857 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5859 c_parser_error (parser
, "expected identifier");
5860 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5863 id1
= c_parser_peek_token (parser
)->value
;
5864 c_parser_consume_token (parser
);
5865 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5867 c_parser_error (parser
, "expected identifier");
5868 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5871 id2
= c_parser_peek_token (parser
)->value
;
5872 c_parser_consume_token (parser
);
5873 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5874 objc_declare_alias (id1
, id2
);
5877 /* Parse an objc-protocol-definition.
5879 objc-protocol-definition:
5880 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5881 @protocol identifier-list ;
5883 "@protocol identifier ;" should be resolved as "@protocol
5884 identifier-list ;": objc-methodprotolist may not start with a
5885 semicolon in the first alternative if objc-protocol-refs are
5889 c_parser_objc_protocol_definition (c_parser
*parser
)
5891 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5892 c_parser_consume_token (parser
);
5893 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5895 c_parser_error (parser
, "expected identifier");
5898 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5899 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5901 tree list
= NULL_TREE
;
5902 /* Any identifiers, including those declared as type names, are
5907 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5909 c_parser_error (parser
, "expected identifier");
5912 id
= c_parser_peek_token (parser
)->value
;
5913 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5914 c_parser_consume_token (parser
);
5915 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5916 c_parser_consume_token (parser
);
5920 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5921 objc_declare_protocols (list
);
5925 tree id
= c_parser_peek_token (parser
)->value
;
5926 tree proto
= NULL_TREE
;
5927 c_parser_consume_token (parser
);
5928 if (c_parser_next_token_is (parser
, CPP_LESS
))
5929 proto
= c_parser_objc_protocol_refs (parser
);
5930 objc_pq_context
= 1;
5931 objc_start_protocol (id
, proto
);
5932 c_parser_objc_methodprotolist (parser
);
5933 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5934 objc_pq_context
= 0;
5935 objc_finish_interface ();
5939 /* Parse an objc-method-type.
5946 static enum tree_code
5947 c_parser_objc_method_type (c_parser
*parser
)
5949 switch (c_parser_peek_token (parser
)->type
)
5952 c_parser_consume_token (parser
);
5955 c_parser_consume_token (parser
);
5962 /* Parse an objc-method-definition.
5964 objc-method-definition:
5965 objc-method-type objc-method-decl ;[opt] compound-statement
5969 c_parser_objc_method_definition (c_parser
*parser
)
5971 enum tree_code type
= c_parser_objc_method_type (parser
);
5973 objc_set_method_type (type
);
5974 objc_pq_context
= 1;
5975 decl
= c_parser_objc_method_decl (parser
);
5976 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5978 c_parser_consume_token (parser
);
5980 pedwarn ("extra semicolon in method definition specified");
5982 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5984 c_parser_error (parser
, "expected %<{%>");
5987 objc_pq_context
= 0;
5988 objc_start_method_definition (decl
);
5989 add_stmt (c_parser_compound_statement (parser
));
5990 objc_finish_method_definition (current_function_decl
);
5993 /* Parse an objc-methodprotolist.
5995 objc-methodprotolist:
5997 objc-methodprotolist objc-methodproto
5998 objc-methodprotolist declaration
5999 objc-methodprotolist ;
6001 The declaration is a data definition, which may be missing
6002 declaration specifiers under the same rules and diagnostics as
6003 other data definitions outside functions, and the stray semicolon
6004 is diagnosed the same way as a stray semicolon outside a
6008 c_parser_objc_methodprotolist (c_parser
*parser
)
6012 /* The list is terminated by @end. */
6013 switch (c_parser_peek_token (parser
)->type
)
6017 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
6018 c_parser_consume_token (parser
);
6022 c_parser_objc_methodproto (parser
);
6025 c_parser_pragma (parser
, pragma_external
);
6030 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6032 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6038 /* Parse an objc-methodproto.
6041 objc-method-type objc-method-decl ;
6045 c_parser_objc_methodproto (c_parser
*parser
)
6047 enum tree_code type
= c_parser_objc_method_type (parser
);
6049 objc_set_method_type (type
);
6050 /* Remember protocol qualifiers in prototypes. */
6051 objc_pq_context
= 1;
6052 decl
= c_parser_objc_method_decl (parser
);
6053 /* Forget protocol qualifiers here. */
6054 objc_pq_context
= 0;
6055 objc_add_method_declaration (decl
);
6056 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6059 /* Parse an objc-method-decl.
6062 ( objc-type-name ) objc-selector
6064 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6065 objc-keyword-selector objc-optparmlist
6067 objc-keyword-selector:
6069 objc-keyword-selector objc-keyword-decl
6072 objc-selector : ( objc-type-name ) identifier
6073 objc-selector : identifier
6074 : ( objc-type-name ) identifier
6078 objc-optparms objc-optellipsis
6082 objc-opt-parms , parameter-declaration
6090 c_parser_objc_method_decl (c_parser
*parser
)
6092 tree type
= NULL_TREE
;
6094 tree parms
= NULL_TREE
;
6095 bool ellipsis
= false;
6097 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6099 c_parser_consume_token (parser
);
6100 type
= c_parser_objc_type_name (parser
);
6101 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6103 sel
= c_parser_objc_selector (parser
);
6104 /* If there is no selector, or a colon follows, we have an
6105 objc-keyword-selector. If there is a selector, and a colon does
6106 not follow, that selector ends the objc-method-decl. */
6107 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6110 tree list
= NULL_TREE
;
6113 tree atype
= NULL_TREE
, id
, keyworddecl
;
6114 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6116 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6118 c_parser_consume_token (parser
);
6119 atype
= c_parser_objc_type_name (parser
);
6120 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6123 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6125 c_parser_error (parser
, "expected identifier");
6126 return error_mark_node
;
6128 id
= c_parser_peek_token (parser
)->value
;
6129 c_parser_consume_token (parser
);
6130 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6131 list
= chainon (list
, keyworddecl
);
6132 tsel
= c_parser_objc_selector (parser
);
6133 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6136 /* Parse the optional parameter list. Optional Objective-C
6137 method parameters follow the C syntax, and may include '...'
6138 to denote a variable number of arguments. */
6139 parms
= make_node (TREE_LIST
);
6140 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6142 struct c_parm
*parm
;
6143 c_parser_consume_token (parser
);
6144 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6147 c_parser_consume_token (parser
);
6150 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6153 parms
= chainon (parms
,
6154 build_tree_list (NULL_TREE
, grokparm (parm
)));
6158 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6161 /* Parse an objc-type-name.
6164 objc-type-qualifiers[opt] type-name
6165 objc-type-qualifiers[opt]
6167 objc-type-qualifiers:
6169 objc-type-qualifiers objc-type-qualifier
6171 objc-type-qualifier: one of
6172 in out inout bycopy byref oneway
6176 c_parser_objc_type_name (c_parser
*parser
)
6178 tree quals
= NULL_TREE
;
6179 struct c_type_name
*typename
= NULL
;
6180 tree type
= NULL_TREE
;
6183 c_token
*token
= c_parser_peek_token (parser
);
6184 if (token
->type
== CPP_KEYWORD
6185 && (token
->keyword
== RID_IN
6186 || token
->keyword
== RID_OUT
6187 || token
->keyword
== RID_INOUT
6188 || token
->keyword
== RID_BYCOPY
6189 || token
->keyword
== RID_BYREF
6190 || token
->keyword
== RID_ONEWAY
))
6192 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6193 c_parser_consume_token (parser
);
6198 if (c_parser_next_token_starts_typename (parser
))
6199 typename
= c_parser_type_name (parser
);
6201 type
= groktypename (typename
);
6202 return build_tree_list (quals
, type
);
6205 /* Parse objc-protocol-refs.
6212 c_parser_objc_protocol_refs (c_parser
*parser
)
6214 tree list
= NULL_TREE
;
6215 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6216 c_parser_consume_token (parser
);
6217 /* Any identifiers, including those declared as type names, are OK
6222 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6224 c_parser_error (parser
, "expected identifier");
6227 id
= c_parser_peek_token (parser
)->value
;
6228 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6229 c_parser_consume_token (parser
);
6230 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6231 c_parser_consume_token (parser
);
6235 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6239 /* Parse an objc-try-catch-statement.
6241 objc-try-catch-statement:
6242 @try compound-statement objc-catch-list[opt]
6243 @try compound-statement objc-catch-list[opt] @finally compound-statement
6246 @catch ( parameter-declaration ) compound-statement
6247 objc-catch-list @catch ( parameter-declaration ) compound-statement
6251 c_parser_objc_try_catch_statement (c_parser
*parser
)
6255 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
6256 c_parser_consume_token (parser
);
6257 loc
= c_parser_peek_token (parser
)->location
;
6258 stmt
= c_parser_compound_statement (parser
);
6259 objc_begin_try_stmt (loc
, stmt
);
6260 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
6262 struct c_parm
*parm
;
6263 c_parser_consume_token (parser
);
6264 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6266 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6269 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6272 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6273 objc_begin_catch_clause (grokparm (parm
));
6274 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6275 c_parser_compound_statement_nostart (parser
);
6276 objc_finish_catch_clause ();
6278 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6282 c_parser_consume_token (parser
);
6283 finloc
= c_parser_peek_token (parser
)->location
;
6284 finstmt
= c_parser_compound_statement (parser
);
6285 objc_build_finally_clause (finloc
, finstmt
);
6287 objc_finish_try_stmt ();
6290 /* Parse an objc-synchronized-statement.
6292 objc-synchronized-statement:
6293 @synchronized ( expression ) compound-statement
6297 c_parser_objc_synchronized_statement (c_parser
*parser
)
6301 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6302 c_parser_consume_token (parser
);
6303 loc
= c_parser_peek_token (parser
)->location
;
6304 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6306 expr
= c_parser_expression (parser
).value
;
6307 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6310 expr
= error_mark_node
;
6311 stmt
= c_parser_compound_statement (parser
);
6312 objc_build_synchronized (loc
, expr
, stmt
);
6315 /* Parse an objc-selector; return NULL_TREE without an error if the
6316 next token is not an objc-selector.
6321 enum struct union if else while do for switch case default
6322 break continue return goto asm sizeof typeof __alignof
6323 unsigned long const short volatile signed restrict _Complex
6324 in out inout bycopy byref oneway int char float double void _Bool
6326 ??? Why this selection of keywords but not, for example, storage
6327 class specifiers? */
6330 c_parser_objc_selector (c_parser
*parser
)
6332 c_token
*token
= c_parser_peek_token (parser
);
6333 tree value
= token
->value
;
6334 if (token
->type
== CPP_NAME
)
6336 c_parser_consume_token (parser
);
6339 if (token
->type
!= CPP_KEYWORD
)
6341 switch (token
->keyword
)
6382 c_parser_consume_token (parser
);
6389 /* Parse an objc-selector-arg.
6393 objc-keywordname-list
6395 objc-keywordname-list:
6397 objc-keywordname-list objc-keywordname
6405 c_parser_objc_selector_arg (c_parser
*parser
)
6407 tree sel
= c_parser_objc_selector (parser
);
6408 tree list
= NULL_TREE
;
6409 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6413 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6415 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6416 sel
= c_parser_objc_selector (parser
);
6417 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6423 /* Parse an objc-receiver.
6432 c_parser_objc_receiver (c_parser
*parser
)
6434 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6435 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6436 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6438 tree id
= c_parser_peek_token (parser
)->value
;
6439 c_parser_consume_token (parser
);
6440 return objc_get_class_reference (id
);
6442 return c_parser_expression (parser
).value
;
6445 /* Parse objc-message-args.
6449 objc-keywordarg-list
6451 objc-keywordarg-list:
6453 objc-keywordarg-list objc-keywordarg
6456 objc-selector : objc-keywordexpr
6461 c_parser_objc_message_args (c_parser
*parser
)
6463 tree sel
= c_parser_objc_selector (parser
);
6464 tree list
= NULL_TREE
;
6465 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6470 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6472 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6473 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6474 sel
= c_parser_objc_selector (parser
);
6475 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6481 /* Parse an objc-keywordexpr.
6488 c_parser_objc_keywordexpr (c_parser
*parser
)
6490 tree list
= c_parser_expr_list (parser
, true);
6491 if (TREE_CHAIN (list
) == NULL_TREE
)
6493 /* Just return the expression, remove a level of
6495 return TREE_VALUE (list
);
6499 /* We have a comma expression, we will collapse later. */
6505 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6506 should be considered, statements. ALLOW_STMT is true if we're within
6507 the context of a function and such pragmas are to be allowed. Returns
6508 true if we actually parsed such a pragma. */
6511 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6515 id
= c_parser_peek_token (parser
)->pragma_kind
;
6516 gcc_assert (id
!= PRAGMA_NONE
);
6520 case PRAGMA_OMP_BARRIER
:
6521 if (context
!= pragma_compound
)
6523 if (context
== pragma_stmt
)
6524 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6525 "used in compound statements");
6528 c_parser_omp_barrier (parser
);
6531 case PRAGMA_OMP_FLUSH
:
6532 if (context
!= pragma_compound
)
6534 if (context
== pragma_stmt
)
6535 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6536 "used in compound statements");
6539 c_parser_omp_flush (parser
);
6542 case PRAGMA_OMP_THREADPRIVATE
:
6543 c_parser_omp_threadprivate (parser
);
6546 case PRAGMA_OMP_SECTION
:
6547 error ("%<#pragma omp section%> may only be used in "
6548 "%<#pragma omp sections%> construct");
6549 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6552 case PRAGMA_GCC_PCH_PREPROCESS
:
6553 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6554 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6558 if (id
< PRAGMA_FIRST_EXTERNAL
)
6560 if (context
== pragma_external
)
6563 c_parser_error (parser
, "expected declaration specifiers");
6564 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6567 c_parser_omp_construct (parser
);
6573 c_parser_consume_pragma (parser
);
6574 c_invoke_pragma_handler (id
);
6576 /* Skip to EOL, but suppress any error message. Those will have been
6577 generated by the handler routine through calling error, as opposed
6578 to calling c_parser_error. */
6579 parser
->error
= true;
6580 c_parser_skip_to_pragma_eol (parser
);
6585 /* The interface the pragma parsers have to the lexer. */
6588 pragma_lex (tree
*value
)
6590 c_token
*tok
= c_parser_peek_token (the_parser
);
6591 enum cpp_ttype ret
= tok
->type
;
6593 *value
= tok
->value
;
6594 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6598 if (ret
== CPP_KEYWORD
)
6600 c_parser_consume_token (the_parser
);
6607 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6611 c_parser_consume_pragma (parser
);
6612 if (c_parser_next_token_is (parser
, CPP_STRING
))
6614 name
= c_parser_peek_token (parser
)->value
;
6615 c_parser_consume_token (parser
);
6618 c_parser_error (parser
, "expected string literal");
6619 c_parser_skip_to_pragma_eol (parser
);
6622 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6625 /* OpenMP 2.5 parsing routines. */
6627 /* Returns name of the next clause.
6628 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6629 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6630 returned and the token is consumed. */
6632 static pragma_omp_clause
6633 c_parser_omp_clause_name (c_parser
*parser
)
6635 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6637 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6638 result
= PRAGMA_OMP_CLAUSE_IF
;
6639 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6640 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6641 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6643 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6648 if (!strcmp ("copyin", p
))
6649 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6650 else if (!strcmp ("copyprivate", p
))
6651 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6654 if (!strcmp ("firstprivate", p
))
6655 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6658 if (!strcmp ("lastprivate", p
))
6659 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6662 if (!strcmp ("nowait", p
))
6663 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6664 else if (!strcmp ("num_threads", p
))
6665 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6668 if (!strcmp ("ordered", p
))
6669 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6672 if (!strcmp ("private", p
))
6673 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6676 if (!strcmp ("reduction", p
))
6677 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6680 if (!strcmp ("schedule", p
))
6681 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6682 else if (!strcmp ("shared", p
))
6683 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6688 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6689 c_parser_consume_token (parser
);
6694 /* Validate that a clause of the given type does not already exist. */
6697 check_no_duplicate_clause (tree clauses
, enum tree_code code
, const char *name
)
6701 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6702 if (OMP_CLAUSE_CODE (c
) == code
)
6704 error ("too many %qs clauses", name
);
6712 variable-list , identifier
6714 If KIND is nonzero, create the appropriate node and install the decl
6715 in OMP_CLAUSE_DECL and add the node to the head of the list.
6717 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6718 return the list created. */
6721 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6724 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6725 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6726 c_parser_error (parser
, "expected identifier");
6728 while (c_parser_next_token_is (parser
, CPP_NAME
)
6729 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6731 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6734 undeclared_variable (c_parser_peek_token (parser
)->value
,
6735 c_parser_peek_token (parser
)->location
);
6736 else if (t
== error_mark_node
)
6740 tree u
= build_omp_clause (kind
);
6741 OMP_CLAUSE_DECL (u
) = t
;
6742 OMP_CLAUSE_CHAIN (u
) = list
;
6746 list
= tree_cons (t
, NULL_TREE
, list
);
6748 c_parser_consume_token (parser
);
6750 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6753 c_parser_consume_token (parser
);
6759 /* Similarly, but expect leading and trailing parenthesis. This is a very
6760 common case for omp clauses. */
6763 c_parser_omp_var_list_parens (c_parser
*parser
, enum tree_code kind
, tree list
)
6765 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6767 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6768 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6774 copyin ( variable-list ) */
6777 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6779 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6783 copyprivate ( variable-list ) */
6786 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6788 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6792 default ( shared | none ) */
6795 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6797 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6800 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6802 if (c_parser_next_token_is (parser
, CPP_NAME
))
6804 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6809 if (strcmp ("none", p
) != 0)
6811 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6815 if (strcmp ("shared", p
) != 0)
6817 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6824 c_parser_consume_token (parser
);
6829 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6831 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6833 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6836 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6837 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6838 OMP_CLAUSE_CHAIN (c
) = list
;
6839 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6845 firstprivate ( variable-list ) */
6848 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6850 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6854 if ( expression ) */
6857 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
6859 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6861 tree t
= c_parser_paren_condition (parser
);
6864 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
6866 c
= build_omp_clause (OMP_CLAUSE_IF
);
6867 OMP_CLAUSE_IF_EXPR (c
) = t
;
6868 OMP_CLAUSE_CHAIN (c
) = list
;
6872 c_parser_error (parser
, "expected %<(%>");
6878 lastprivate ( variable-list ) */
6881 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
6883 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
6890 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6894 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
6896 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
6897 OMP_CLAUSE_CHAIN (c
) = list
;
6902 num_threads ( expression ) */
6905 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
6907 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6909 tree c
, t
= c_parser_expression (parser
).value
;
6911 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6913 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
6915 c_parser_error (parser
, "expected integer expression");
6919 /* Attempt to statically determine when the number isn't positive. */
6920 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
6921 build_int_cst (TREE_TYPE (t
), 0));
6922 if (c
== boolean_true_node
)
6924 warning (0, "%<num_threads%> value must be positive");
6925 t
= integer_one_node
;
6928 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
6930 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
6931 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
6932 OMP_CLAUSE_CHAIN (c
) = list
;
6943 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6947 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
6949 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
6950 OMP_CLAUSE_CHAIN (c
) = list
;
6955 private ( variable-list ) */
6958 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
6960 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
6964 reduction ( reduction-operator : variable-list )
6967 One of: + * - & ^ | && || */
6970 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
6972 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6974 enum tree_code code
;
6976 switch (c_parser_peek_token (parser
)->type
)
6988 code
= BIT_AND_EXPR
;
6991 code
= BIT_XOR_EXPR
;
6994 code
= BIT_IOR_EXPR
;
6997 code
= TRUTH_ANDIF_EXPR
;
7000 code
= TRUTH_ORIF_EXPR
;
7003 c_parser_error (parser
,
7004 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
7005 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7006 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7009 c_parser_consume_token (parser
);
7010 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7014 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7015 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7016 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7020 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7026 schedule ( schedule-kind )
7027 schedule ( schedule-kind , expression )
7030 static | dynamic | guided | runtime
7034 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7038 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7041 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7043 if (c_parser_next_token_is (parser
, CPP_NAME
))
7045 tree kind
= c_parser_peek_token (parser
)->value
;
7046 const char *p
= IDENTIFIER_POINTER (kind
);
7051 if (strcmp ("dynamic", p
) != 0)
7053 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7057 if (strcmp ("guided", p
) != 0)
7059 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7063 if (strcmp ("runtime", p
) != 0)
7065 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7072 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7073 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7077 c_parser_consume_token (parser
);
7078 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7080 c_parser_consume_token (parser
);
7082 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7084 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7085 error ("schedule %<runtime%> does not take "
7086 "a %<chunk_size%> parameter");
7087 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7088 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7090 c_parser_error (parser
, "expected integer expression");
7092 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7095 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7096 "expected %<,%> or %<)%>");
7098 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7099 OMP_CLAUSE_CHAIN (c
) = list
;
7103 c_parser_error (parser
, "invalid schedule kind");
7104 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7109 shared ( variable-list ) */
7112 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7114 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7117 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7118 is a bitmask in MASK. Return the list of clauses found; the result
7119 of clause default goes in *pdefault. */
7122 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7125 tree clauses
= NULL
;
7127 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7129 const pragma_omp_clause c_kind
= c_parser_omp_clause_name (parser
);
7131 tree prev
= clauses
;
7135 case PRAGMA_OMP_CLAUSE_COPYIN
:
7136 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7139 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7140 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7141 c_name
= "copyprivate";
7143 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7144 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7147 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7148 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7149 c_name
= "firstprivate";
7151 case PRAGMA_OMP_CLAUSE_IF
:
7152 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7155 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7156 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7157 c_name
= "lastprivate";
7159 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7160 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7163 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7164 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7165 c_name
= "num_threads";
7167 case PRAGMA_OMP_CLAUSE_ORDERED
:
7168 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7171 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7172 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7175 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7176 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7177 c_name
= "reduction";
7179 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7180 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7181 c_name
= "schedule";
7183 case PRAGMA_OMP_CLAUSE_SHARED
:
7184 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7188 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7192 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7194 /* Remove the invalid clause(s) from the list to avoid
7195 confusing the rest of the compiler. */
7197 error ("%qs is not valid for %qs", c_name
, where
);
7202 c_parser_skip_to_pragma_eol (parser
);
7204 return c_finish_omp_clauses (clauses
);
7211 In practice, we're also interested in adding the statement to an
7212 outer node. So it is convenient if we work around the fact that
7213 c_parser_statement calls add_stmt. */
7216 c_parser_omp_structured_block (c_parser
*parser
)
7218 tree stmt
= push_stmt_list ();
7219 c_parser_statement (parser
);
7220 return pop_stmt_list (stmt
);
7224 # pragma omp atomic new-line
7228 x binop= expr | x++ | ++x | x-- | --x
7230 +, *, -, /, &, ^, |, <<, >>
7232 where x is an lvalue expression with scalar type. */
7235 c_parser_omp_atomic (c_parser
*parser
)
7239 enum tree_code code
;
7241 c_parser_skip_to_pragma_eol (parser
);
7243 lhs
= c_parser_unary_expression (parser
).value
;
7244 switch (TREE_CODE (lhs
))
7248 c_parser_skip_to_end_of_block_or_statement (parser
);
7251 case PREINCREMENT_EXPR
:
7252 case POSTINCREMENT_EXPR
:
7253 lhs
= TREE_OPERAND (lhs
, 0);
7255 rhs
= integer_one_node
;
7258 case PREDECREMENT_EXPR
:
7259 case POSTDECREMENT_EXPR
:
7260 lhs
= TREE_OPERAND (lhs
, 0);
7262 rhs
= integer_one_node
;
7266 switch (c_parser_peek_token (parser
)->type
)
7272 code
= TRUNC_DIV_EXPR
;
7287 code
= BIT_AND_EXPR
;
7290 code
= BIT_IOR_EXPR
;
7293 code
= BIT_XOR_EXPR
;
7296 c_parser_error (parser
,
7297 "invalid operator for %<#pragma omp atomic%>");
7301 c_parser_consume_token (parser
);
7302 rhs
= c_parser_expression (parser
).value
;
7305 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7306 if (stmt
!= error_mark_node
)
7308 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7313 # pragma omp barrier new-line
7317 c_parser_omp_barrier (c_parser
*parser
)
7319 c_parser_consume_pragma (parser
);
7320 c_parser_skip_to_pragma_eol (parser
);
7322 c_finish_omp_barrier ();
7326 # pragma omp critical [(name)] new-line
7331 c_parser_omp_critical (c_parser
*parser
)
7333 tree stmt
, name
= NULL
;
7335 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7337 c_parser_consume_token (parser
);
7338 if (c_parser_next_token_is (parser
, CPP_NAME
))
7340 name
= c_parser_peek_token (parser
)->value
;
7341 c_parser_consume_token (parser
);
7342 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7345 c_parser_error (parser
, "expected identifier");
7347 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7348 c_parser_error (parser
, "expected %<(%> or end of line");
7349 c_parser_skip_to_pragma_eol (parser
);
7351 stmt
= c_parser_omp_structured_block (parser
);
7352 return c_finish_omp_critical (stmt
, name
);
7356 # pragma omp flush flush-vars[opt] new-line
7359 ( variable-list ) */
7362 c_parser_omp_flush (c_parser
*parser
)
7364 c_parser_consume_pragma (parser
);
7365 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7366 c_parser_omp_var_list_parens (parser
, 0, NULL
);
7367 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7368 c_parser_error (parser
, "expected %<(%> or end of line");
7369 c_parser_skip_to_pragma_eol (parser
);
7371 c_finish_omp_flush ();
7374 /* Parse the restricted form of the for statment allowed by OpenMP.
7375 The real trick here is to determine the loop control variable early
7376 so that we can push a new decl if necessary to make it private. */
7379 c_parser_omp_for_loop (c_parser
*parser
)
7381 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
;
7384 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7386 c_parser_error (parser
, "for statement expected");
7389 loc
= c_parser_peek_token (parser
)->location
;
7390 c_parser_consume_token (parser
);
7392 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7395 /* Parse the initialization declaration or expression. */
7396 if (c_parser_next_token_starts_declspecs (parser
))
7398 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7399 decl
= check_for_loop_decls ();
7404 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7405 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7407 decl
= c_parser_postfix_expression (parser
).value
;
7409 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7411 init
= c_parser_expr_no_commas (parser
, NULL
).value
;
7412 init
= build_modify_expr (decl
, NOP_EXPR
, init
);
7413 init
= c_process_expr_stmt (init
);
7415 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7420 /* Parse the loop condition. */
7422 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7424 cond
= c_parser_expression_conv (parser
).value
;
7425 cond
= c_objc_common_truthvalue_conversion (cond
);
7427 SET_EXPR_LOCATION (cond
, input_location
);
7429 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7431 /* Parse the increment expression. */
7433 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7434 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7435 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7438 save_break
= c_break_label
;
7439 c_break_label
= size_one_node
;
7440 save_cont
= c_cont_label
;
7441 c_cont_label
= NULL_TREE
;
7442 body
= push_stmt_list ();
7444 add_stmt (c_parser_c99_block_statement (parser
));
7446 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7448 body
= pop_stmt_list (body
);
7449 c_break_label
= save_break
;
7450 c_cont_label
= save_cont
;
7452 /* Only bother calling c_finish_omp_for if we havn't already generated
7453 an error from the initialization parsing. */
7454 if (decl
!= NULL
&& decl
!= error_mark_node
&& init
!= error_mark_node
)
7455 return c_finish_omp_for (loc
, decl
, init
, cond
, incr
, body
, NULL
);
7459 c_parser_error (parser
, "expected iteration declaration or initialization");
7460 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7461 decl
= init
= cond
= incr
= NULL_TREE
;
7466 #pragma omp for for-clause[optseq] new-line
7470 #define OMP_FOR_CLAUSE_MASK \
7471 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7472 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7473 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7474 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7475 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7476 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7477 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7480 c_parser_omp_for (c_parser
*parser
)
7482 tree block
, clauses
, ret
;
7484 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7487 block
= c_begin_compound_stmt (true);
7488 ret
= c_parser_omp_for_loop (parser
);
7490 OMP_FOR_CLAUSES (ret
) = clauses
;
7491 block
= c_end_compound_stmt (block
, true);
7498 # pragma omp master new-line
7503 c_parser_omp_master (c_parser
*parser
)
7505 c_parser_skip_to_pragma_eol (parser
);
7506 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7510 # pragma omp ordered new-line
7515 c_parser_omp_ordered (c_parser
*parser
)
7517 c_parser_skip_to_pragma_eol (parser
);
7518 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7524 { section-sequence }
7527 section-directive[opt] structured-block
7528 section-sequence section-directive structured-block */
7531 c_parser_omp_sections_scope (c_parser
*parser
)
7534 bool error_suppress
= false;
7537 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7539 /* Avoid skipping until the end of the block. */
7540 parser
->error
= false;
7544 stmt
= push_stmt_list ();
7546 loc
= c_parser_peek_token (parser
)->location
;
7547 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7549 substmt
= push_stmt_list ();
7553 c_parser_statement (parser
);
7555 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7557 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7559 if (c_parser_next_token_is (parser
, CPP_EOF
))
7563 substmt
= pop_stmt_list (substmt
);
7564 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7565 SET_EXPR_LOCATION (substmt
, loc
);
7571 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7573 if (c_parser_next_token_is (parser
, CPP_EOF
))
7576 loc
= c_parser_peek_token (parser
)->location
;
7577 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7579 c_parser_consume_pragma (parser
);
7580 c_parser_skip_to_pragma_eol (parser
);
7581 error_suppress
= false;
7583 else if (!error_suppress
)
7585 error ("expected %<#pragma omp section%> or %<}%>");
7586 error_suppress
= true;
7589 substmt
= c_parser_omp_structured_block (parser
);
7590 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7591 SET_EXPR_LOCATION (substmt
, loc
);
7594 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7595 "expected %<#pragma omp section%> or %<}%>");
7597 substmt
= pop_stmt_list (stmt
);
7599 stmt
= make_node (OMP_SECTIONS
);
7600 TREE_TYPE (stmt
) = void_type_node
;
7601 OMP_SECTIONS_BODY (stmt
) = substmt
;
7603 return add_stmt (stmt
);
7607 # pragma omp sections sections-clause[optseq] newline
7611 #define OMP_SECTIONS_CLAUSE_MASK \
7612 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7613 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7614 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7615 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7616 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7619 c_parser_omp_sections (c_parser
*parser
)
7621 tree block
, clauses
, ret
;
7623 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7624 "#pragma omp sections");
7626 block
= c_begin_compound_stmt (true);
7627 ret
= c_parser_omp_sections_scope (parser
);
7629 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7630 block
= c_end_compound_stmt (block
, true);
7637 # pragma parallel parallel-clause new-line
7638 # pragma parallel for parallel-for-clause new-line
7639 # pragma parallel sections parallel-sections-clause new-line
7642 #define OMP_PARALLEL_CLAUSE_MASK \
7643 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7644 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7645 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7646 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7647 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7648 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7649 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7650 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7653 c_parser_omp_parallel (c_parser
*parser
)
7655 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
7656 const char *p_name
= "#pragma omp parallel";
7657 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
7658 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
7660 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7662 c_parser_consume_token (parser
);
7663 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
7664 p_name
= "#pragma omp parallel for";
7665 mask
|= OMP_FOR_CLAUSE_MASK
;
7666 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7668 else if (c_parser_next_token_is (parser
, CPP_NAME
))
7670 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7671 if (strcmp (p
, "sections") == 0)
7673 c_parser_consume_token (parser
);
7674 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
7675 p_name
= "#pragma omp parallel sections";
7676 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
7677 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7681 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
7685 case PRAGMA_OMP_PARALLEL
:
7686 block
= c_begin_omp_parallel ();
7687 c_parser_statement (parser
);
7688 stmt
= c_finish_omp_parallel (clauses
, block
);
7691 case PRAGMA_OMP_PARALLEL_FOR
:
7692 block
= c_begin_omp_parallel ();
7693 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7694 stmt
= c_parser_omp_for_loop (parser
);
7696 OMP_FOR_CLAUSES (stmt
) = ws_clause
;
7697 stmt
= c_finish_omp_parallel (par_clause
, block
);
7698 OMP_PARALLEL_COMBINED (stmt
) = 1;
7701 case PRAGMA_OMP_PARALLEL_SECTIONS
:
7702 block
= c_begin_omp_parallel ();
7703 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7704 stmt
= c_parser_omp_sections_scope (parser
);
7706 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
7707 stmt
= c_finish_omp_parallel (par_clause
, block
);
7708 OMP_PARALLEL_COMBINED (stmt
) = 1;
7719 # pragma omp single single-clause[optseq] new-line
7723 #define OMP_SINGLE_CLAUSE_MASK \
7724 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7725 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7726 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7727 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7730 c_parser_omp_single (c_parser
*parser
)
7732 tree stmt
= make_node (OMP_SINGLE
);
7733 TREE_TYPE (stmt
) = void_type_node
;
7735 OMP_SINGLE_CLAUSES (stmt
)
7736 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
7737 "#pragma omp single");
7738 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
7740 return add_stmt (stmt
);
7744 /* Main entry point to parsing most OpenMP pragmas. */
7747 c_parser_omp_construct (c_parser
*parser
)
7749 enum pragma_kind p_kind
;
7753 loc
= c_parser_peek_token (parser
)->location
;
7754 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
7755 c_parser_consume_pragma (parser
);
7757 /* For all constructs below except #pragma omp atomic
7758 MUST_NOT_THROW catch handlers are needed when exceptions
7760 if (p_kind
!= PRAGMA_OMP_ATOMIC
)
7761 c_maybe_initialize_eh ();
7765 case PRAGMA_OMP_ATOMIC
:
7766 c_parser_omp_atomic (parser
);
7768 case PRAGMA_OMP_CRITICAL
:
7769 stmt
= c_parser_omp_critical (parser
);
7771 case PRAGMA_OMP_FOR
:
7772 stmt
= c_parser_omp_for (parser
);
7774 case PRAGMA_OMP_MASTER
:
7775 stmt
= c_parser_omp_master (parser
);
7777 case PRAGMA_OMP_ORDERED
:
7778 stmt
= c_parser_omp_ordered (parser
);
7780 case PRAGMA_OMP_PARALLEL
:
7781 stmt
= c_parser_omp_parallel (parser
);
7783 case PRAGMA_OMP_SECTIONS
:
7784 stmt
= c_parser_omp_sections (parser
);
7786 case PRAGMA_OMP_SINGLE
:
7787 stmt
= c_parser_omp_single (parser
);
7794 SET_EXPR_LOCATION (stmt
, loc
);
7799 # pragma omp threadprivate (variable-list) */
7802 c_parser_omp_threadprivate (c_parser
*parser
)
7806 c_parser_consume_pragma (parser
);
7807 vars
= c_parser_omp_var_list_parens (parser
, 0, NULL
);
7809 if (!targetm
.have_tls
)
7810 sorry ("threadprivate variables not supported in this target");
7812 /* Mark every variable in VARS to be assigned thread local storage. */
7813 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
7815 tree v
= TREE_PURPOSE (t
);
7817 /* If V had already been marked threadprivate, it doesn't matter
7818 whether it had been used prior to this point. */
7819 if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
7820 error ("%qE declared %<threadprivate%> after first use", v
);
7821 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
7822 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
7823 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
7824 error ("%<threadprivate%> %qE has incomplete type", v
);
7827 if (! DECL_THREAD_LOCAL_P (v
))
7829 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
7830 /* If rtl has been already set for this var, call
7831 make_decl_rtl once again, so that encode_section_info
7832 has a chance to look at the new decl flags. */
7833 if (DECL_RTL_SET_P (v
))
7836 C_DECL_THREADPRIVATE_P (v
) = 1;
7840 c_parser_skip_to_pragma_eol (parser
);
7844 /* Parse a single source file. */
7849 /* Use local storage to begin. If the first token is a pragma, parse it.
7850 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7851 which will cause garbage collection. */
7854 memset (&tparser
, 0, sizeof tparser
);
7855 the_parser
= &tparser
;
7857 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
7858 c_parser_pragma_pch_preprocess (&tparser
);
7860 the_parser
= GGC_NEW (c_parser
);
7861 *the_parser
= tparser
;
7863 c_parser_translation_unit (the_parser
);
7867 #include "gt-c-parser.h"