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 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 2, 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 COPYING. If not, write to the Free
22 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
27 Make sure all relevant comments, and all relevant code from all
28 actions, brought over from old parser. Verify exact correspondence
31 Add testcases covering every input symbol in every state in old and
34 Include full syntax for GNU C, including erroneous cases accepted
35 with error messages, in syntax productions in comments.
37 Make more diagnostics in the front end generally take an explicit
38 location rather than implicitly using input_location. */
42 #include "coretypes.h"
46 #include "langhooks.h"
62 /* Miscellaneous data and functions needed for the parser. */
66 /* Objective-C specific parser/lexer information. */
68 static int objc_pq_context
= 0;
70 /* The following flag is needed to contextualize Objective-C lexical
71 analysis. In some cases (e.g., 'int NSObject;'), it is undesirable
72 to bind an identifier to an Objective-C class, even if a class with
74 static int objc_need_raw_identifier
= 0;
75 #define OBJC_NEED_RAW_IDENTIFIER(VAL) \
77 if (c_dialect_objc ()) \
78 objc_need_raw_identifier = VAL; \
81 /* The reserved keyword table. */
85 ENUM_BITFIELD(rid
) rid
: 16;
86 unsigned int disable
: 16;
89 /* Disable mask. Keywords are disabled if (reswords[i].disable &
91 #define D_C89 0x01 /* not in C89 */
92 #define D_EXT 0x02 /* GCC extension */
93 #define D_EXT89 0x04 /* GCC extension incorporated in C99 */
94 #define D_OBJC 0x08 /* Objective C only */
96 static const struct resword reswords
[] =
98 { "_Bool", RID_BOOL
, 0 },
99 { "_Complex", RID_COMPLEX
, 0 },
100 { "_Decimal32", RID_DFLOAT32
, D_EXT
},
101 { "_Decimal64", RID_DFLOAT64
, D_EXT
},
102 { "_Decimal128", RID_DFLOAT128
, D_EXT
},
103 { "__FUNCTION__", RID_FUNCTION_NAME
, 0 },
104 { "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME
, 0 },
105 { "__alignof", RID_ALIGNOF
, 0 },
106 { "__alignof__", RID_ALIGNOF
, 0 },
107 { "__asm", RID_ASM
, 0 },
108 { "__asm__", RID_ASM
, 0 },
109 { "__attribute", RID_ATTRIBUTE
, 0 },
110 { "__attribute__", RID_ATTRIBUTE
, 0 },
111 { "__builtin_choose_expr", RID_CHOOSE_EXPR
, 0 },
112 { "__builtin_offsetof", RID_OFFSETOF
, 0 },
113 { "__builtin_types_compatible_p", RID_TYPES_COMPATIBLE_P
, 0 },
114 { "__builtin_va_arg", RID_VA_ARG
, 0 },
115 { "__complex", RID_COMPLEX
, 0 },
116 { "__complex__", RID_COMPLEX
, 0 },
117 { "__const", RID_CONST
, 0 },
118 { "__const__", RID_CONST
, 0 },
119 { "__extension__", RID_EXTENSION
, 0 },
120 { "__func__", RID_C99_FUNCTION_NAME
, 0 },
121 { "__imag", RID_IMAGPART
, 0 },
122 { "__imag__", RID_IMAGPART
, 0 },
123 { "__inline", RID_INLINE
, 0 },
124 { "__inline__", RID_INLINE
, 0 },
125 { "__label__", RID_LABEL
, 0 },
126 { "__real", RID_REALPART
, 0 },
127 { "__real__", RID_REALPART
, 0 },
128 { "__restrict", RID_RESTRICT
, 0 },
129 { "__restrict__", RID_RESTRICT
, 0 },
130 { "__signed", RID_SIGNED
, 0 },
131 { "__signed__", RID_SIGNED
, 0 },
132 { "__thread", RID_THREAD
, 0 },
133 { "__typeof", RID_TYPEOF
, 0 },
134 { "__typeof__", RID_TYPEOF
, 0 },
135 { "__volatile", RID_VOLATILE
, 0 },
136 { "__volatile__", RID_VOLATILE
, 0 },
137 { "asm", RID_ASM
, D_EXT
},
138 { "auto", RID_AUTO
, 0 },
139 { "break", RID_BREAK
, 0 },
140 { "case", RID_CASE
, 0 },
141 { "char", RID_CHAR
, 0 },
142 { "const", RID_CONST
, 0 },
143 { "continue", RID_CONTINUE
, 0 },
144 { "default", RID_DEFAULT
, 0 },
146 { "double", RID_DOUBLE
, 0 },
147 { "else", RID_ELSE
, 0 },
148 { "enum", RID_ENUM
, 0 },
149 { "extern", RID_EXTERN
, 0 },
150 { "float", RID_FLOAT
, 0 },
151 { "for", RID_FOR
, 0 },
152 { "goto", RID_GOTO
, 0 },
154 { "inline", RID_INLINE
, D_EXT89
},
155 { "int", RID_INT
, 0 },
156 { "long", RID_LONG
, 0 },
157 { "register", RID_REGISTER
, 0 },
158 { "restrict", RID_RESTRICT
, D_C89
},
159 { "return", RID_RETURN
, 0 },
160 { "short", RID_SHORT
, 0 },
161 { "signed", RID_SIGNED
, 0 },
162 { "sizeof", RID_SIZEOF
, 0 },
163 { "static", RID_STATIC
, 0 },
164 { "struct", RID_STRUCT
, 0 },
165 { "switch", RID_SWITCH
, 0 },
166 { "typedef", RID_TYPEDEF
, 0 },
167 { "typeof", RID_TYPEOF
, D_EXT
},
168 { "union", RID_UNION
, 0 },
169 { "unsigned", RID_UNSIGNED
, 0 },
170 { "void", RID_VOID
, 0 },
171 { "volatile", RID_VOLATILE
, 0 },
172 { "while", RID_WHILE
, 0 },
173 /* These Objective-C keywords are recognized only immediately after
175 { "class", RID_AT_CLASS
, D_OBJC
},
176 { "compatibility_alias", RID_AT_ALIAS
, D_OBJC
},
177 { "defs", RID_AT_DEFS
, D_OBJC
},
178 { "encode", RID_AT_ENCODE
, D_OBJC
},
179 { "end", RID_AT_END
, D_OBJC
},
180 { "implementation", RID_AT_IMPLEMENTATION
, D_OBJC
},
181 { "interface", RID_AT_INTERFACE
, D_OBJC
},
182 { "private", RID_AT_PRIVATE
, D_OBJC
},
183 { "protected", RID_AT_PROTECTED
, D_OBJC
},
184 { "protocol", RID_AT_PROTOCOL
, D_OBJC
},
185 { "public", RID_AT_PUBLIC
, D_OBJC
},
186 { "selector", RID_AT_SELECTOR
, D_OBJC
},
187 { "throw", RID_AT_THROW
, D_OBJC
},
188 { "try", RID_AT_TRY
, D_OBJC
},
189 { "catch", RID_AT_CATCH
, D_OBJC
},
190 { "finally", RID_AT_FINALLY
, D_OBJC
},
191 { "synchronized", RID_AT_SYNCHRONIZED
, D_OBJC
},
192 /* These are recognized only in protocol-qualifier context
194 { "bycopy", RID_BYCOPY
, D_OBJC
},
195 { "byref", RID_BYREF
, D_OBJC
},
196 { "in", RID_IN
, D_OBJC
},
197 { "inout", RID_INOUT
, D_OBJC
},
198 { "oneway", RID_ONEWAY
, D_OBJC
},
199 { "out", RID_OUT
, D_OBJC
},
201 #define N_reswords (sizeof reswords / sizeof (struct resword))
203 /* All OpenMP clauses. OpenMP 2.5. */
204 typedef enum pragma_omp_clause
{
205 PRAGMA_OMP_CLAUSE_NONE
= 0,
207 PRAGMA_OMP_CLAUSE_COPYIN
,
208 PRAGMA_OMP_CLAUSE_COPYPRIVATE
,
209 PRAGMA_OMP_CLAUSE_DEFAULT
,
210 PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
,
211 PRAGMA_OMP_CLAUSE_IF
,
212 PRAGMA_OMP_CLAUSE_LASTPRIVATE
,
213 PRAGMA_OMP_CLAUSE_NOWAIT
,
214 PRAGMA_OMP_CLAUSE_NUM_THREADS
,
215 PRAGMA_OMP_CLAUSE_ORDERED
,
216 PRAGMA_OMP_CLAUSE_PRIVATE
,
217 PRAGMA_OMP_CLAUSE_REDUCTION
,
218 PRAGMA_OMP_CLAUSE_SCHEDULE
,
219 PRAGMA_OMP_CLAUSE_SHARED
223 /* Initialization routine for this file. */
228 /* The only initialization required is of the reserved word
232 int mask
= (flag_isoc99
? 0 : D_C89
)
233 | (flag_no_asm
? (flag_isoc99
? D_EXT
: D_EXT
|D_EXT89
) : 0);
235 if (!c_dialect_objc ())
238 ridpointers
= GGC_CNEWVEC (tree
, (int) RID_MAX
);
239 for (i
= 0; i
< N_reswords
; i
++)
241 /* If a keyword is disabled, do not enter it into the table
242 and so create a canonical spelling that isn't a keyword. */
243 if (reswords
[i
].disable
& mask
)
246 id
= get_identifier (reswords
[i
].word
);
247 C_RID_CODE (id
) = reswords
[i
].rid
;
248 C_IS_RESERVED_WORD (id
) = 1;
249 ridpointers
[(int) reswords
[i
].rid
] = id
;
253 /* The C lexer intermediates between the lexer in cpplib and c-lex.c
254 and the C parser. Unlike the C++ lexer, the parser structure
255 stores the lexer information instead of using a separate structure.
256 Identifiers are separated into ordinary identifiers, type names,
257 keywords and some other Objective-C types of identifiers, and some
258 look-ahead is maintained.
260 ??? It might be a good idea to lex the whole file up front (as for
261 C++). It would then be possible to share more of the C and C++
262 lexer code, if desired. */
264 /* The following local token type is used. */
267 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
269 /* More information about the type of a CPP_NAME token. */
270 typedef enum c_id_kind
{
271 /* An ordinary identifier. */
273 /* An identifier declared as a typedef name. */
275 /* An identifier declared as an Objective-C class name. */
277 /* Not an identifier. */
281 /* A single C token after string literal concatenation and conversion
282 of preprocessing tokens to tokens. */
283 typedef struct c_token
GTY (())
285 /* The kind of token. */
286 ENUM_BITFIELD (cpp_ttype
) type
: 8;
287 /* If this token is a CPP_NAME, this value indicates whether also
288 declared as some kind of type. Otherwise, it is C_ID_NONE. */
289 ENUM_BITFIELD (c_id_kind
) id_kind
: 8;
290 /* If this token is a keyword, this value indicates which keyword.
291 Otherwise, this value is RID_MAX. */
292 ENUM_BITFIELD (rid
) keyword
: 8;
293 /* If this token is a CPP_PRAGMA, this indicates the pragma that
294 was seen. Otherwise it is PRAGMA_NONE. */
295 ENUM_BITFIELD (pragma_kind
) pragma_kind
: 7;
296 /* True if this token is from a system header. */
297 BOOL_BITFIELD in_system_header
: 1;
298 /* The value associated with this token, if any. */
300 /* The location at which this token was found. */
304 /* A parser structure recording information about the state and
305 context of parsing. Includes lexer information with up to two
306 tokens of look-ahead; more are not needed for C. */
307 typedef struct c_parser
GTY(())
309 /* The look-ahead tokens. */
311 /* How many look-ahead tokens are available (0, 1 or 2). */
313 /* True if a syntax error is being recovered from; false otherwise.
314 c_parser_error sets this flag. It should clear this flag when
315 enough tokens have been consumed to recover from the error. */
316 BOOL_BITFIELD error
: 1;
317 /* True if we're processing a pragma, and shouldn't automatically
318 consume CPP_PRAGMA_EOL. */
319 BOOL_BITFIELD in_pragma
: 1;
323 /* The actual parser and external interface. ??? Does this need to be
324 garbage-collected? */
326 static GTY (()) c_parser
*the_parser
;
329 /* Read in and lex a single token, storing it in *TOKEN. */
332 c_lex_one_token (c_token
*token
)
334 timevar_push (TV_LEX
);
336 token
->type
= c_lex_with_flags (&token
->value
, &token
->location
, NULL
);
337 token
->id_kind
= C_ID_NONE
;
338 token
->keyword
= RID_MAX
;
339 token
->pragma_kind
= PRAGMA_NONE
;
340 token
->in_system_header
= in_system_header
;
348 int objc_force_identifier
= objc_need_raw_identifier
;
349 OBJC_NEED_RAW_IDENTIFIER (0);
351 if (C_IS_RESERVED_WORD (token
->value
))
353 enum rid rid_code
= C_RID_CODE (token
->value
);
355 if (c_dialect_objc ())
357 if (!OBJC_IS_AT_KEYWORD (rid_code
)
358 && (!OBJC_IS_PQ_KEYWORD (rid_code
) || objc_pq_context
))
360 /* Return the canonical spelling for this keyword. */
361 token
->value
= ridpointers
[(int) rid_code
];
362 token
->type
= CPP_KEYWORD
;
363 token
->keyword
= rid_code
;
369 /* Return the canonical spelling for this keyword. */
370 token
->value
= ridpointers
[(int) rid_code
];
371 token
->type
= CPP_KEYWORD
;
372 token
->keyword
= rid_code
;
377 decl
= lookup_name (token
->value
);
380 if (TREE_CODE (decl
) == TYPE_DECL
)
382 token
->id_kind
= C_ID_TYPENAME
;
386 else if (c_dialect_objc ())
388 tree objc_interface_decl
= objc_is_class_name (token
->value
);
389 /* Objective-C class names are in the same namespace as
390 variables and typedefs, and hence are shadowed by local
392 if (objc_interface_decl
393 && (global_bindings_p ()
394 || (!objc_force_identifier
&& !decl
)))
396 token
->value
= objc_interface_decl
;
397 token
->id_kind
= C_ID_CLASSNAME
;
401 token
->id_kind
= C_ID_ID
;
405 /* This only happens in Objective-C; it must be a keyword. */
406 token
->type
= CPP_KEYWORD
;
407 token
->keyword
= C_RID_CODE (token
->value
);
411 case CPP_CLOSE_PAREN
:
413 /* These tokens may affect the interpretation of any identifiers
414 following, if doing Objective-C. */
415 OBJC_NEED_RAW_IDENTIFIER (0);
418 /* We smuggled the cpp_token->u.pragma value in an INTEGER_CST. */
419 token
->pragma_kind
= TREE_INT_CST_LOW (token
->value
);
425 timevar_pop (TV_LEX
);
428 /* Return a pointer to the next token from PARSER, reading it in if
431 static inline c_token
*
432 c_parser_peek_token (c_parser
*parser
)
434 if (parser
->tokens_avail
== 0)
436 c_lex_one_token (&parser
->tokens
[0]);
437 parser
->tokens_avail
= 1;
439 return &parser
->tokens
[0];
442 /* Return true if the next token from PARSER has the indicated
446 c_parser_next_token_is (c_parser
*parser
, enum cpp_ttype type
)
448 return c_parser_peek_token (parser
)->type
== type
;
451 /* Return true if the next token from PARSER does not have the
455 c_parser_next_token_is_not (c_parser
*parser
, enum cpp_ttype type
)
457 return !c_parser_next_token_is (parser
, type
);
460 /* Return true if the next token from PARSER is the indicated
464 c_parser_next_token_is_keyword (c_parser
*parser
, enum rid keyword
)
468 /* Peek at the next token. */
469 token
= c_parser_peek_token (parser
);
470 /* Check to see if it is the indicated keyword. */
471 return token
->keyword
== keyword
;
474 /* Return true if TOKEN can start a type name,
477 c_token_starts_typename (c_token
*token
)
482 switch (token
->id_kind
)
489 gcc_assert (c_dialect_objc ());
495 switch (token
->keyword
)
524 if (c_dialect_objc ())
532 /* Return true if the next token from PARSER can start a type name,
535 c_parser_next_token_starts_typename (c_parser
*parser
)
537 c_token
*token
= c_parser_peek_token (parser
);
538 return c_token_starts_typename (token
);
541 /* Return true if TOKEN can start declaration specifiers, false
544 c_token_starts_declspecs (c_token
*token
)
549 switch (token
->id_kind
)
556 gcc_assert (c_dialect_objc ());
562 switch (token
->keyword
)
598 if (c_dialect_objc ())
606 /* Return true if the next token from PARSER can start declaration
607 specifiers, false otherwise. */
609 c_parser_next_token_starts_declspecs (c_parser
*parser
)
611 c_token
*token
= c_parser_peek_token (parser
);
612 return c_token_starts_declspecs (token
);
615 /* Return a pointer to the next-but-one token from PARSER, reading it
616 in if necessary. The next token is already read in. */
619 c_parser_peek_2nd_token (c_parser
*parser
)
621 if (parser
->tokens_avail
>= 2)
622 return &parser
->tokens
[1];
623 gcc_assert (parser
->tokens_avail
== 1);
624 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
625 gcc_assert (parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
626 c_lex_one_token (&parser
->tokens
[1]);
627 parser
->tokens_avail
= 2;
628 return &parser
->tokens
[1];
631 /* Consume the next token from PARSER. */
634 c_parser_consume_token (c_parser
*parser
)
636 gcc_assert (parser
->tokens_avail
>= 1);
637 gcc_assert (parser
->tokens
[0].type
!= CPP_EOF
);
638 gcc_assert (!parser
->in_pragma
|| parser
->tokens
[0].type
!= CPP_PRAGMA_EOL
);
639 gcc_assert (parser
->error
|| parser
->tokens
[0].type
!= CPP_PRAGMA
);
640 if (parser
->tokens_avail
== 2)
641 parser
->tokens
[0] = parser
->tokens
[1];
642 parser
->tokens_avail
--;
645 /* Expect the current token to be a #pragma. Consume it and remember
646 that we've begun parsing a pragma. */
649 c_parser_consume_pragma (c_parser
*parser
)
651 gcc_assert (!parser
->in_pragma
);
652 gcc_assert (parser
->tokens_avail
>= 1);
653 gcc_assert (parser
->tokens
[0].type
== CPP_PRAGMA
);
654 if (parser
->tokens_avail
== 2)
655 parser
->tokens
[0] = parser
->tokens
[1];
656 parser
->tokens_avail
--;
657 parser
->in_pragma
= true;
660 /* Update the globals input_location and in_system_header from
663 c_parser_set_source_position_from_token (c_token
*token
)
665 if (token
->type
!= CPP_EOF
)
667 input_location
= token
->location
;
668 in_system_header
= token
->in_system_header
;
672 /* Issue a diagnostic of the form
673 FILE:LINE: MESSAGE before TOKEN
674 where TOKEN is the next token in the input stream of PARSER.
675 MESSAGE (specified by the caller) is usually of the form "expected
678 Do not issue a diagnostic if still recovering from an error.
680 ??? This is taken from the C++ parser, but building up messages in
681 this way is not i18n-friendly and some other approach should be
685 c_parser_error (c_parser
*parser
, const char *gmsgid
)
687 c_token
*token
= c_parser_peek_token (parser
);
690 parser
->error
= true;
693 /* This diagnostic makes more sense if it is tagged to the line of
694 the token we just peeked at. */
695 c_parser_set_source_position_from_token (token
);
696 c_parse_error (gmsgid
,
697 /* Because c_parse_error does not understand
698 CPP_KEYWORD, keywords are treated like
700 (token
->type
== CPP_KEYWORD
? CPP_NAME
: token
->type
),
704 /* If the next token is of the indicated TYPE, consume it. Otherwise,
705 issue the error MSGID. If MSGID is NULL then a message has already
706 been produced and no message will be produced this time. Returns
707 true if found, false otherwise. */
710 c_parser_require (c_parser
*parser
,
714 if (c_parser_next_token_is (parser
, type
))
716 c_parser_consume_token (parser
);
721 c_parser_error (parser
, msgid
);
726 /* If the next token is the indicated keyword, consume it. Otherwise,
727 issue the error MSGID. Returns true if found, false otherwise. */
730 c_parser_require_keyword (c_parser
*parser
,
734 if (c_parser_next_token_is_keyword (parser
, keyword
))
736 c_parser_consume_token (parser
);
741 c_parser_error (parser
, msgid
);
746 /* Like c_parser_require, except that tokens will be skipped until the
747 desired token is found. An error message is still produced if the
748 next token is not as expected. If MSGID is NULL then a message has
749 already been produced and no message will be produced this
753 c_parser_skip_until_found (c_parser
*parser
,
757 unsigned nesting_depth
= 0;
759 if (c_parser_require (parser
, type
, msgid
))
762 /* Skip tokens until the desired token is found. */
765 /* Peek at the next token. */
766 c_token
*token
= c_parser_peek_token (parser
);
767 /* If we've reached the token we want, consume it and stop. */
768 if (token
->type
== type
&& !nesting_depth
)
770 c_parser_consume_token (parser
);
774 /* If we've run out of tokens, stop. */
775 if (token
->type
== CPP_EOF
)
777 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
779 if (token
->type
== CPP_OPEN_BRACE
780 || token
->type
== CPP_OPEN_PAREN
781 || token
->type
== CPP_OPEN_SQUARE
)
783 else if (token
->type
== CPP_CLOSE_BRACE
784 || token
->type
== CPP_CLOSE_PAREN
785 || token
->type
== CPP_CLOSE_SQUARE
)
787 if (nesting_depth
-- == 0)
790 /* Consume this token. */
791 c_parser_consume_token (parser
);
793 parser
->error
= false;
796 /* Skip tokens until the end of a parameter is found, but do not
797 consume the comma, semicolon or closing delimiter. */
800 c_parser_skip_to_end_of_parameter (c_parser
*parser
)
802 unsigned nesting_depth
= 0;
806 c_token
*token
= c_parser_peek_token (parser
);
807 if ((token
->type
== CPP_COMMA
|| token
->type
== CPP_SEMICOLON
)
810 /* If we've run out of tokens, stop. */
811 if (token
->type
== CPP_EOF
)
813 if (token
->type
== CPP_PRAGMA_EOL
&& parser
->in_pragma
)
815 if (token
->type
== CPP_OPEN_BRACE
816 || token
->type
== CPP_OPEN_PAREN
817 || token
->type
== CPP_OPEN_SQUARE
)
819 else if (token
->type
== CPP_CLOSE_BRACE
820 || token
->type
== CPP_CLOSE_PAREN
821 || token
->type
== CPP_CLOSE_SQUARE
)
823 if (nesting_depth
-- == 0)
826 /* Consume this token. */
827 c_parser_consume_token (parser
);
829 parser
->error
= false;
832 /* Expect to be at the end of the pragma directive and consume an
833 end of line marker. */
836 c_parser_skip_to_pragma_eol (c_parser
*parser
)
838 gcc_assert (parser
->in_pragma
);
839 parser
->in_pragma
= false;
841 if (!c_parser_require (parser
, CPP_PRAGMA_EOL
, "expected end of line"))
844 c_token
*token
= c_parser_peek_token (parser
);
845 if (token
->type
== CPP_EOF
)
847 if (token
->type
== CPP_PRAGMA_EOL
)
849 c_parser_consume_token (parser
);
852 c_parser_consume_token (parser
);
855 parser
->error
= false;
858 /* Skip tokens until we have consumed an entire block, or until we
859 have consumed a non-nested ';'. */
862 c_parser_skip_to_end_of_block_or_statement (c_parser
*parser
)
864 unsigned nesting_depth
= 0;
865 bool save_error
= parser
->error
;
871 /* Peek at the next token. */
872 token
= c_parser_peek_token (parser
);
880 if (parser
->in_pragma
)
885 /* If the next token is a ';', we have reached the
886 end of the statement. */
889 /* Consume the ';'. */
890 c_parser_consume_token (parser
);
895 case CPP_CLOSE_BRACE
:
896 /* If the next token is a non-nested '}', then we have
897 reached the end of the current block. */
898 if (nesting_depth
== 0 || --nesting_depth
== 0)
900 c_parser_consume_token (parser
);
906 /* If it the next token is a '{', then we are entering a new
907 block. Consume the entire block. */
912 /* If we see a pragma, consume the whole thing at once. We
913 have some safeguards against consuming pragmas willy-nilly.
914 Normally, we'd expect to be here with parser->error set,
915 which disables these safeguards. But it's possible to get
916 here for secondary error recovery, after parser->error has
918 c_parser_consume_pragma (parser
);
919 c_parser_skip_to_pragma_eol (parser
);
920 parser
->error
= save_error
;
927 c_parser_consume_token (parser
);
931 parser
->error
= false;
934 /* Save the warning flags which are controlled by __extension__. */
937 disable_extension_diagnostics (void)
940 | (warn_pointer_arith
<< 1)
941 | (warn_traditional
<< 2)
944 warn_pointer_arith
= 0;
945 warn_traditional
= 0;
950 /* Restore the warning flags which are controlled by __extension__.
951 FLAGS is the return value from disable_extension_diagnostics. */
954 restore_extension_diagnostics (int flags
)
956 pedantic
= flags
& 1;
957 warn_pointer_arith
= (flags
>> 1) & 1;
958 warn_traditional
= (flags
>> 2) & 1;
959 flag_iso
= (flags
>> 3) & 1;
962 /* Possibly kinds of declarator to parse. */
963 typedef enum c_dtr_syn
{
964 /* A normal declarator with an identifier. */
966 /* An abstract declarator (maybe empty). */
968 /* A parameter declarator: may be either, but after a type name does
969 not redeclare a typedef name as an identifier if it can
970 alternatively be interpreted as a typedef name; see DR#009,
971 applied in C90 TC1, omitted from C99 and reapplied in C99 TC2
972 following DR#249. For example, given a typedef T, "int T" and
973 "int *T" are valid parameter declarations redeclaring T, while
974 "int (T)" and "int * (T)" and "int (T[])" and "int (T (int))" are
975 abstract declarators rather than involving redundant parentheses;
976 the same applies with attributes inside the parentheses before
981 static void c_parser_external_declaration (c_parser
*);
982 static void c_parser_asm_definition (c_parser
*);
983 static void c_parser_declaration_or_fndef (c_parser
*, bool, bool, bool, bool);
984 static void c_parser_declspecs (c_parser
*, struct c_declspecs
*, bool, bool,
986 static struct c_typespec
c_parser_enum_specifier (c_parser
*);
987 static struct c_typespec
c_parser_struct_or_union_specifier (c_parser
*);
988 static tree
c_parser_struct_declaration (c_parser
*);
989 static struct c_typespec
c_parser_typeof_specifier (c_parser
*);
990 static struct c_declarator
*c_parser_declarator (c_parser
*, bool, c_dtr_syn
,
992 static struct c_declarator
*c_parser_direct_declarator (c_parser
*, bool,
994 static struct c_declarator
*c_parser_direct_declarator_inner (c_parser
*,
996 struct c_declarator
*);
997 static struct c_arg_info
*c_parser_parms_declarator (c_parser
*, bool, tree
);
998 static struct c_arg_info
*c_parser_parms_list_declarator (c_parser
*, tree
);
999 static struct c_parm
*c_parser_parameter_declaration (c_parser
*, tree
);
1000 static tree
c_parser_simple_asm_expr (c_parser
*);
1001 static tree
c_parser_attributes (c_parser
*);
1002 static struct c_type_name
*c_parser_type_name (c_parser
*);
1003 static struct c_expr
c_parser_initializer (c_parser
*);
1004 static struct c_expr
c_parser_braced_init (c_parser
*, tree
, bool);
1005 static void c_parser_initelt (c_parser
*);
1006 static void c_parser_initval (c_parser
*, struct c_expr
*);
1007 static tree
c_parser_compound_statement (c_parser
*);
1008 static void c_parser_compound_statement_nostart (c_parser
*);
1009 static void c_parser_label (c_parser
*);
1010 static void c_parser_statement (c_parser
*);
1011 static void c_parser_statement_after_labels (c_parser
*);
1012 static void c_parser_if_statement (c_parser
*);
1013 static void c_parser_switch_statement (c_parser
*);
1014 static void c_parser_while_statement (c_parser
*);
1015 static void c_parser_do_statement (c_parser
*);
1016 static void c_parser_for_statement (c_parser
*);
1017 static tree
c_parser_asm_statement (c_parser
*);
1018 static tree
c_parser_asm_operands (c_parser
*, bool);
1019 static tree
c_parser_asm_clobbers (c_parser
*);
1020 static struct c_expr
c_parser_expr_no_commas (c_parser
*, struct c_expr
*);
1021 static struct c_expr
c_parser_conditional_expression (c_parser
*,
1023 static struct c_expr
c_parser_binary_expression (c_parser
*, struct c_expr
*);
1024 static struct c_expr
c_parser_cast_expression (c_parser
*, struct c_expr
*);
1025 static struct c_expr
c_parser_unary_expression (c_parser
*);
1026 static struct c_expr
c_parser_sizeof_expression (c_parser
*);
1027 static struct c_expr
c_parser_alignof_expression (c_parser
*);
1028 static struct c_expr
c_parser_postfix_expression (c_parser
*);
1029 static struct c_expr
c_parser_postfix_expression_after_paren_type (c_parser
*,
1030 struct c_type_name
*);
1031 static struct c_expr
c_parser_postfix_expression_after_primary (c_parser
*,
1033 static struct c_expr
c_parser_expression (c_parser
*);
1034 static struct c_expr
c_parser_expression_conv (c_parser
*);
1035 static tree
c_parser_expr_list (c_parser
*, bool);
1036 static void c_parser_omp_construct (c_parser
*);
1037 static void c_parser_omp_threadprivate (c_parser
*);
1038 static void c_parser_omp_barrier (c_parser
*);
1039 static void c_parser_omp_flush (c_parser
*);
1041 enum pragma_context
{ pragma_external
, pragma_stmt
, pragma_compound
};
1042 static bool c_parser_pragma (c_parser
*, enum pragma_context
);
1044 /* These Objective-C parser functions are only ever called when
1045 compiling Objective-C. */
1046 static void c_parser_objc_class_definition (c_parser
*);
1047 static void c_parser_objc_class_instance_variables (c_parser
*);
1048 static void c_parser_objc_class_declaration (c_parser
*);
1049 static void c_parser_objc_alias_declaration (c_parser
*);
1050 static void c_parser_objc_protocol_definition (c_parser
*);
1051 static enum tree_code
c_parser_objc_method_type (c_parser
*);
1052 static void c_parser_objc_method_definition (c_parser
*);
1053 static void c_parser_objc_methodprotolist (c_parser
*);
1054 static void c_parser_objc_methodproto (c_parser
*);
1055 static tree
c_parser_objc_method_decl (c_parser
*);
1056 static tree
c_parser_objc_type_name (c_parser
*);
1057 static tree
c_parser_objc_protocol_refs (c_parser
*);
1058 static void c_parser_objc_try_catch_statement (c_parser
*);
1059 static void c_parser_objc_synchronized_statement (c_parser
*);
1060 static tree
c_parser_objc_selector (c_parser
*);
1061 static tree
c_parser_objc_selector_arg (c_parser
*);
1062 static tree
c_parser_objc_receiver (c_parser
*);
1063 static tree
c_parser_objc_message_args (c_parser
*);
1064 static tree
c_parser_objc_keywordexpr (c_parser
*);
1066 /* Parse a translation unit (C90 6.7, C99 6.9).
1069 external-declarations
1071 external-declarations:
1072 external-declaration
1073 external-declarations external-declaration
1082 c_parser_translation_unit (c_parser
*parser
)
1084 if (c_parser_next_token_is (parser
, CPP_EOF
))
1087 pedwarn ("ISO C forbids an empty source file");
1091 void *obstack_position
= obstack_alloc (&parser_obstack
, 0);
1095 c_parser_external_declaration (parser
);
1096 obstack_free (&parser_obstack
, obstack_position
);
1098 while (c_parser_next_token_is_not (parser
, CPP_EOF
));
1102 /* Parse an external declaration (C90 6.7, C99 6.9).
1104 external-declaration:
1110 external-declaration:
1113 __extension__ external-declaration
1117 external-declaration:
1118 objc-class-definition
1119 objc-class-declaration
1120 objc-alias-declaration
1121 objc-protocol-definition
1122 objc-method-definition
1127 c_parser_external_declaration (c_parser
*parser
)
1130 switch (c_parser_peek_token (parser
)->type
)
1133 switch (c_parser_peek_token (parser
)->keyword
)
1136 ext
= disable_extension_diagnostics ();
1137 c_parser_consume_token (parser
);
1138 c_parser_external_declaration (parser
);
1139 restore_extension_diagnostics (ext
);
1142 c_parser_asm_definition (parser
);
1144 case RID_AT_INTERFACE
:
1145 case RID_AT_IMPLEMENTATION
:
1146 gcc_assert (c_dialect_objc ());
1147 c_parser_objc_class_definition (parser
);
1150 gcc_assert (c_dialect_objc ());
1151 c_parser_objc_class_declaration (parser
);
1154 gcc_assert (c_dialect_objc ());
1155 c_parser_objc_alias_declaration (parser
);
1157 case RID_AT_PROTOCOL
:
1158 gcc_assert (c_dialect_objc ());
1159 c_parser_objc_protocol_definition (parser
);
1162 gcc_assert (c_dialect_objc ());
1163 c_parser_consume_token (parser
);
1164 objc_finish_implementation ();
1172 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
1173 c_parser_consume_token (parser
);
1176 c_parser_pragma (parser
, pragma_external
);
1180 if (c_dialect_objc ())
1182 c_parser_objc_method_definition (parser
);
1185 /* Else fall through, and yield a syntax error trying to parse
1186 as a declaration or function definition. */
1189 /* A declaration or a function definition. We can only tell
1190 which after parsing the declaration specifiers, if any, and
1191 the first declarator. */
1192 c_parser_declaration_or_fndef (parser
, true, true, false, true);
1198 /* Parse a declaration or function definition (C90 6.5, 6.7.1, C99
1199 6.7, 6.9.1). If FNDEF_OK is true, a function definition is
1200 accepted; otherwise (old-style parameter declarations) only other
1201 declarations are accepted. If NESTED is true, we are inside a
1202 function or parsing old-style parameter declarations; any functions
1203 encountered are nested functions and declaration specifiers are
1204 required; otherwise we are at top level and functions are normal
1205 functions and declaration specifiers may be optional. If EMPTY_OK
1206 is true, empty declarations are OK (subject to all other
1207 constraints); otherwise (old-style parameter declarations) they are
1208 diagnosed. If START_ATTR_OK is true, the declaration specifiers
1209 may start with attributes; otherwise they may not.
1212 declaration-specifiers init-declarator-list[opt] ;
1214 function-definition:
1215 declaration-specifiers[opt] declarator declaration-list[opt]
1220 declaration-list declaration
1222 init-declarator-list:
1224 init-declarator-list , init-declarator
1227 declarator simple-asm-expr[opt] attributes[opt]
1228 declarator simple-asm-expr[opt] attributes[opt] = initializer
1232 nested-function-definition:
1233 declaration-specifiers declarator declaration-list[opt]
1236 The simple-asm-expr and attributes are GNU extensions.
1238 This function does not handle __extension__; that is handled in its
1239 callers. ??? Following the old parser, __extension__ may start
1240 external declarations, declarations in functions and declarations
1241 at the start of "for" loops, but not old-style parameter
1244 C99 requires declaration specifiers in a function definition; the
1245 absence is diagnosed through the diagnosis of implicit int. In GNU
1246 C we also allow but diagnose declarations without declaration
1247 specifiers, but only at top level (elsewhere they conflict with
1253 threadprivate-directive */
1256 c_parser_declaration_or_fndef (c_parser
*parser
, bool fndef_ok
, bool empty_ok
,
1257 bool nested
, bool start_attr_ok
)
1259 struct c_declspecs
*specs
;
1261 tree all_prefix_attrs
;
1262 bool diagnosed_no_specs
= false;
1264 specs
= build_null_declspecs ();
1265 c_parser_declspecs (parser
, specs
, true, true, start_attr_ok
);
1268 c_parser_skip_to_end_of_block_or_statement (parser
);
1271 if (nested
&& !specs
->declspecs_seen_p
)
1273 c_parser_error (parser
, "expected declaration specifiers");
1274 c_parser_skip_to_end_of_block_or_statement (parser
);
1277 finish_declspecs (specs
);
1278 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1284 shadow_tag_warned (specs
, 1);
1285 pedwarn ("empty declaration");
1287 c_parser_consume_token (parser
);
1290 pending_xref_error ();
1291 prefix_attrs
= specs
->attrs
;
1292 all_prefix_attrs
= prefix_attrs
;
1293 specs
->attrs
= NULL_TREE
;
1296 struct c_declarator
*declarator
;
1299 /* Declaring either one or more declarators (in which case we
1300 should diagnose if there were no declaration specifiers) or a
1301 function definition (in which case the diagnostic for
1302 implicit int suffices). */
1303 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
1304 C_DTR_NORMAL
, &dummy
);
1305 if (declarator
== NULL
)
1307 c_parser_skip_to_end_of_block_or_statement (parser
);
1310 if (c_parser_next_token_is (parser
, CPP_EQ
)
1311 || c_parser_next_token_is (parser
, CPP_COMMA
)
1312 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
1313 || c_parser_next_token_is_keyword (parser
, RID_ASM
)
1314 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1316 tree asm_name
= NULL_TREE
;
1317 tree postfix_attrs
= NULL_TREE
;
1318 if (!diagnosed_no_specs
&& !specs
->declspecs_seen_p
)
1320 diagnosed_no_specs
= true;
1321 pedwarn ("data definition has no type or storage class");
1323 /* Having seen a data definition, there cannot now be a
1324 function definition. */
1326 if (c_parser_next_token_is_keyword (parser
, RID_ASM
))
1327 asm_name
= c_parser_simple_asm_expr (parser
);
1328 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1329 postfix_attrs
= c_parser_attributes (parser
);
1330 if (c_parser_next_token_is (parser
, CPP_EQ
))
1334 c_parser_consume_token (parser
);
1335 /* The declaration of the variable is in effect while
1336 its initializer is parsed. */
1337 d
= start_decl (declarator
, specs
, true,
1338 chainon (postfix_attrs
, all_prefix_attrs
));
1340 d
= error_mark_node
;
1341 start_init (d
, asm_name
, global_bindings_p ());
1342 init
= c_parser_initializer (parser
);
1344 if (d
!= error_mark_node
)
1346 maybe_warn_string_init (TREE_TYPE (d
), init
);
1347 finish_decl (d
, init
.value
, asm_name
);
1352 tree d
= start_decl (declarator
, specs
, false,
1353 chainon (postfix_attrs
,
1356 finish_decl (d
, NULL_TREE
, asm_name
);
1358 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1360 c_parser_consume_token (parser
);
1361 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
1362 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
1365 all_prefix_attrs
= prefix_attrs
;
1368 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1370 c_parser_consume_token (parser
);
1375 c_parser_error (parser
, "expected %<,%> or %<;%>");
1376 c_parser_skip_to_end_of_block_or_statement (parser
);
1382 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, "
1383 "%<asm%> or %<__attribute__%>");
1384 c_parser_skip_to_end_of_block_or_statement (parser
);
1387 /* Function definition (nested or otherwise). */
1391 pedwarn ("ISO C forbids nested functions");
1392 push_function_context ();
1394 if (!start_function (specs
, declarator
, all_prefix_attrs
))
1396 /* This can appear in many cases looking nothing like a
1397 function definition, so we don't give a more specific
1398 error suggesting there was one. */
1399 c_parser_error (parser
, "expected %<=%>, %<,%>, %<;%>, %<asm%> "
1400 "or %<__attribute__%>");
1402 pop_function_context ();
1405 /* Parse old-style parameter declarations. ??? Attributes are
1406 not allowed to start declaration specifiers here because of a
1407 syntax conflict between a function declaration with attribute
1408 suffix and a function definition with an attribute prefix on
1409 first old-style parameter declaration. Following the old
1410 parser, they are not accepted on subsequent old-style
1411 parameter declarations either. However, there is no
1412 ambiguity after the first declaration, nor indeed on the
1413 first as long as we don't allow postfix attributes after a
1414 declarator with a nonempty identifier list in a definition;
1415 and postfix attributes have never been accepted here in
1416 function definitions either. */
1417 while (c_parser_next_token_is_not (parser
, CPP_EOF
)
1418 && c_parser_next_token_is_not (parser
, CPP_OPEN_BRACE
))
1419 c_parser_declaration_or_fndef (parser
, false, false, true, false);
1420 DECL_SOURCE_LOCATION (current_function_decl
)
1421 = c_parser_peek_token (parser
)->location
;
1422 store_parm_decls ();
1423 fnbody
= c_parser_compound_statement (parser
);
1426 tree decl
= current_function_decl
;
1429 pop_function_context ();
1430 add_stmt (build_stmt (DECL_EXPR
, decl
));
1441 /* Parse an asm-definition (asm() outside a function body). This is a
1449 c_parser_asm_definition (c_parser
*parser
)
1451 tree asm_str
= c_parser_simple_asm_expr (parser
);
1453 cgraph_add_asm_node (asm_str
);
1454 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
1457 /* Parse some declaration specifiers (possibly none) (C90 6.5, C99
1458 6.7), adding them to SPECS (which may already include some).
1459 Storage class specifiers are accepted iff SCSPEC_OK; type
1460 specifiers are accepted iff TYPESPEC_OK; attributes are accepted at
1461 the start iff START_ATTR_OK.
1463 declaration-specifiers:
1464 storage-class-specifier declaration-specifiers[opt]
1465 type-specifier declaration-specifiers[opt]
1466 type-qualifier declaration-specifiers[opt]
1467 function-specifier declaration-specifiers[opt]
1469 Function specifiers (inline) are from C99, and are currently
1470 handled as storage class specifiers, as is __thread.
1472 C90 6.5.1, C99 6.7.1:
1473 storage-class-specifier:
1484 C90 6.5.2, C99 6.7.2:
1497 [_Imaginary removed in C99 TC2]
1498 struct-or-union-specifier
1502 (_Bool and _Complex are new in C99.)
1504 C90 6.5.3, C99 6.7.3:
1511 (restrict is new in C99.)
1515 declaration-specifiers:
1516 attributes declaration-specifiers[opt]
1518 storage-class-specifier:
1530 class-name objc-protocol-refs[opt]
1531 typedef-name objc-protocol-refs
1536 c_parser_declspecs (c_parser
*parser
, struct c_declspecs
*specs
,
1537 bool scspec_ok
, bool typespec_ok
, bool start_attr_ok
)
1539 bool attrs_ok
= start_attr_ok
;
1540 bool seen_type
= specs
->type_seen_p
;
1541 while (c_parser_next_token_is (parser
, CPP_NAME
)
1542 || c_parser_next_token_is (parser
, CPP_KEYWORD
)
1543 || (c_dialect_objc () && c_parser_next_token_is (parser
, CPP_LESS
)))
1545 struct c_typespec t
;
1547 if (c_parser_next_token_is (parser
, CPP_NAME
))
1549 tree value
= c_parser_peek_token (parser
)->value
;
1550 c_id_kind kind
= c_parser_peek_token (parser
)->id_kind
;
1551 /* This finishes the specifiers unless a type name is OK, it
1552 is declared as a type name and a type name hasn't yet
1554 if (!typespec_ok
|| seen_type
1555 || (kind
!= C_ID_TYPENAME
&& kind
!= C_ID_CLASSNAME
))
1557 c_parser_consume_token (parser
);
1560 if (kind
== C_ID_TYPENAME
1561 && (!c_dialect_objc ()
1562 || c_parser_next_token_is_not (parser
, CPP_LESS
)))
1564 t
.kind
= ctsk_typedef
;
1565 /* For a typedef name, record the meaning, not the name.
1566 In case of 'foo foo, bar;'. */
1567 t
.spec
= lookup_name (value
);
1571 tree proto
= NULL_TREE
;
1572 gcc_assert (c_dialect_objc ());
1574 if (c_parser_next_token_is (parser
, CPP_LESS
))
1575 proto
= c_parser_objc_protocol_refs (parser
);
1576 t
.spec
= objc_get_protocol_qualified_type (value
, proto
);
1578 declspecs_add_type (specs
, t
);
1581 if (c_parser_next_token_is (parser
, CPP_LESS
))
1583 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>" -
1584 nisse@lysator.liu.se. */
1586 gcc_assert (c_dialect_objc ());
1587 if (!typespec_ok
|| seen_type
)
1589 proto
= c_parser_objc_protocol_refs (parser
);
1591 t
.spec
= objc_get_protocol_qualified_type (NULL_TREE
, proto
);
1592 declspecs_add_type (specs
, t
);
1595 gcc_assert (c_parser_next_token_is (parser
, CPP_KEYWORD
));
1596 switch (c_parser_peek_token (parser
)->keyword
)
1608 /* TODO: Distinguish between function specifiers (inline)
1609 and storage class specifiers, either here or in
1610 declspecs_add_scspec. */
1611 declspecs_add_scspec (specs
, c_parser_peek_token (parser
)->value
);
1612 c_parser_consume_token (parser
);
1632 OBJC_NEED_RAW_IDENTIFIER (1);
1633 t
.kind
= ctsk_resword
;
1634 t
.spec
= c_parser_peek_token (parser
)->value
;
1635 declspecs_add_type (specs
, t
);
1636 c_parser_consume_token (parser
);
1643 t
= c_parser_enum_specifier (parser
);
1644 declspecs_add_type (specs
, t
);
1652 t
= c_parser_struct_or_union_specifier (parser
);
1653 declspecs_add_type (specs
, t
);
1656 /* ??? The old parser rejected typeof after other type
1657 specifiers, but is a syntax error the best way of
1659 if (!typespec_ok
|| seen_type
)
1663 t
= c_parser_typeof_specifier (parser
);
1664 declspecs_add_type (specs
, t
);
1670 declspecs_add_qual (specs
, c_parser_peek_token (parser
)->value
);
1671 c_parser_consume_token (parser
);
1676 attrs
= c_parser_attributes (parser
);
1677 declspecs_add_attrs (specs
, attrs
);
1686 /* Parse an enum specifier (C90 6.5.2.2, C99 6.7.2.2).
1689 enum attributes[opt] identifier[opt] { enumerator-list } attributes[opt]
1690 enum attributes[opt] identifier[opt] { enumerator-list , } attributes[opt]
1691 enum attributes[opt] identifier
1693 The form with trailing comma is new in C99. The forms with
1694 attributes are GNU extensions. In GNU C, we accept any expression
1695 without commas in the syntax (assignment expressions, not just
1696 conditional expressions); assignment expressions will be diagnosed
1701 enumerator-list , enumerator
1704 enumeration-constant
1705 enumeration-constant = constant-expression
1708 static struct c_typespec
1709 c_parser_enum_specifier (c_parser
*parser
)
1711 struct c_typespec ret
;
1713 tree ident
= NULL_TREE
;
1714 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ENUM
));
1715 c_parser_consume_token (parser
);
1716 attrs
= c_parser_attributes (parser
);
1717 if (c_parser_next_token_is (parser
, CPP_NAME
))
1719 ident
= c_parser_peek_token (parser
)->value
;
1720 c_parser_consume_token (parser
);
1722 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1724 /* Parse an enum definition. */
1725 tree type
= start_enum (ident
);
1727 /* We chain the enumerators in reverse order, then put them in
1728 forward order at the end. */
1729 tree values
= NULL_TREE
;
1730 c_parser_consume_token (parser
);
1737 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
1739 c_parser_error (parser
, "expected identifier");
1740 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1741 values
= error_mark_node
;
1744 enum_id
= c_parser_peek_token (parser
)->value
;
1745 c_parser_consume_token (parser
);
1746 if (c_parser_next_token_is (parser
, CPP_EQ
))
1748 c_parser_consume_token (parser
);
1749 enum_value
= c_parser_expr_no_commas (parser
, NULL
).value
;
1752 enum_value
= NULL_TREE
;
1753 enum_decl
= build_enumerator (enum_id
, enum_value
);
1754 TREE_CHAIN (enum_decl
) = values
;
1757 if (c_parser_next_token_is (parser
, CPP_COMMA
))
1760 c_parser_consume_token (parser
);
1762 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1764 if (seen_comma
&& pedantic
&& !flag_isoc99
)
1765 pedwarn ("comma at end of enumerator list");
1766 c_parser_consume_token (parser
);
1771 c_parser_error (parser
, "expected %<,%> or %<}%>");
1772 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1773 values
= error_mark_node
;
1777 postfix_attrs
= c_parser_attributes (parser
);
1778 ret
.spec
= finish_enum (type
, nreverse (values
),
1779 chainon (attrs
, postfix_attrs
));
1780 ret
.kind
= ctsk_tagdef
;
1785 c_parser_error (parser
, "expected %<{%>");
1786 ret
.spec
= error_mark_node
;
1787 ret
.kind
= ctsk_tagref
;
1790 ret
= parser_xref_tag (ENUMERAL_TYPE
, ident
);
1791 /* In ISO C, enumerated types can be referred to only if already
1793 if (pedantic
&& !COMPLETE_TYPE_P (ret
.spec
))
1794 pedwarn ("ISO C forbids forward references to %<enum%> types");
1798 /* Parse a struct or union specifier (C90 6.5.2.1, C99 6.7.2.1).
1800 struct-or-union-specifier:
1801 struct-or-union attributes[opt] identifier[opt]
1802 { struct-contents } attributes[opt]
1803 struct-or-union attributes[opt] identifier
1806 struct-declaration-list
1808 struct-declaration-list:
1809 struct-declaration ;
1810 struct-declaration-list struct-declaration ;
1817 struct-declaration-list struct-declaration
1819 struct-declaration-list:
1820 struct-declaration-list ;
1823 (Note that in the syntax here, unlike that in ISO C, the semicolons
1824 are included here rather than in struct-declaration, in order to
1825 describe the syntax with extra semicolons and missing semicolon at
1830 struct-declaration-list:
1831 @defs ( class-name )
1833 (Note this does not include a trailing semicolon, but can be
1834 followed by further declarations, and gets a pedwarn-if-pedantic
1835 when followed by a semicolon.) */
1837 static struct c_typespec
1838 c_parser_struct_or_union_specifier (c_parser
*parser
)
1840 struct c_typespec ret
;
1842 tree ident
= NULL_TREE
;
1843 enum tree_code code
;
1844 switch (c_parser_peek_token (parser
)->keyword
)
1855 c_parser_consume_token (parser
);
1856 attrs
= c_parser_attributes (parser
);
1857 if (c_parser_next_token_is (parser
, CPP_NAME
))
1859 ident
= c_parser_peek_token (parser
)->value
;
1860 c_parser_consume_token (parser
);
1862 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
1864 /* Parse a struct or union definition. Start the scope of the
1865 tag before parsing components. */
1866 tree type
= start_struct (code
, ident
);
1868 /* We chain the components in reverse order, then put them in
1869 forward order at the end. Each struct-declaration may
1870 declare multiple components (comma-separated), so we must use
1871 chainon to join them, although when parsing each
1872 struct-declaration we can use TREE_CHAIN directly.
1874 The theory behind all this is that there will be more
1875 semicolon separated fields than comma separated fields, and
1876 so we'll be minimizing the number of node traversals required
1878 tree contents
= NULL_TREE
;
1879 c_parser_consume_token (parser
);
1880 /* Handle the Objective-C @defs construct,
1881 e.g. foo(sizeof(struct{ @defs(ClassName) }));. */
1882 if (c_parser_next_token_is_keyword (parser
, RID_AT_DEFS
))
1885 gcc_assert (c_dialect_objc ());
1886 c_parser_consume_token (parser
);
1887 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
1889 if (c_parser_next_token_is (parser
, CPP_NAME
)
1890 && c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
)
1892 name
= c_parser_peek_token (parser
)->value
;
1893 c_parser_consume_token (parser
);
1897 c_parser_error (parser
, "expected class name");
1898 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
1901 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
1903 contents
= nreverse (objc_get_class_ivars (name
));
1906 /* Parse the struct-declarations and semicolons. Problems with
1907 semicolons are diagnosed here; empty structures are diagnosed
1912 /* Parse any stray semicolon. */
1913 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1916 pedwarn ("extra semicolon in struct or union specified");
1917 c_parser_consume_token (parser
);
1920 /* Stop if at the end of the struct or union contents. */
1921 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1923 c_parser_consume_token (parser
);
1926 /* Accept #pragmas at struct scope. */
1927 if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
1929 c_parser_pragma (parser
, pragma_external
);
1932 /* Parse some comma-separated declarations, but not the
1933 trailing semicolon if any. */
1934 decls
= c_parser_struct_declaration (parser
);
1935 contents
= chainon (decls
, contents
);
1936 /* If no semicolon follows, either we have a parse error or
1937 are at the end of the struct or union and should
1939 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
1940 c_parser_consume_token (parser
);
1943 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
1944 pedwarn ("no semicolon at end of struct or union");
1947 c_parser_error (parser
, "expected %<;%>");
1948 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
1953 postfix_attrs
= c_parser_attributes (parser
);
1954 ret
.spec
= finish_struct (type
, nreverse (contents
),
1955 chainon (attrs
, postfix_attrs
));
1956 ret
.kind
= ctsk_tagdef
;
1961 c_parser_error (parser
, "expected %<{%>");
1962 ret
.spec
= error_mark_node
;
1963 ret
.kind
= ctsk_tagref
;
1966 ret
= parser_xref_tag (code
, ident
);
1970 /* Parse a struct-declaration (C90 6.5.2.1, C99 6.7.2.1), *without*
1971 the trailing semicolon.
1974 specifier-qualifier-list struct-declarator-list
1976 specifier-qualifier-list:
1977 type-specifier specifier-qualifier-list[opt]
1978 type-qualifier specifier-qualifier-list[opt]
1979 attributes specifier-qualifier-list[opt]
1981 struct-declarator-list:
1983 struct-declarator-list , attributes[opt] struct-declarator
1986 declarator attributes[opt]
1987 declarator[opt] : constant-expression attributes[opt]
1992 __extension__ struct-declaration
1993 specifier-qualifier-list
1995 Unlike the ISO C syntax, semicolons are handled elsewhere. The use
1996 of attributes where shown is a GNU extension. In GNU C, we accept
1997 any expression without commas in the syntax (assignment
1998 expressions, not just conditional expressions); assignment
1999 expressions will be diagnosed as non-constant. */
2002 c_parser_struct_declaration (c_parser
*parser
)
2004 struct c_declspecs
*specs
;
2006 tree all_prefix_attrs
;
2008 if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
2012 ext
= disable_extension_diagnostics ();
2013 c_parser_consume_token (parser
);
2014 decl
= c_parser_struct_declaration (parser
);
2015 restore_extension_diagnostics (ext
);
2018 specs
= build_null_declspecs ();
2019 c_parser_declspecs (parser
, specs
, false, true, true);
2022 if (!specs
->declspecs_seen_p
)
2024 c_parser_error (parser
, "expected specifier-qualifier-list");
2027 finish_declspecs (specs
);
2028 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2031 if (!specs
->type_seen_p
)
2034 pedwarn ("ISO C forbids member declarations with no members");
2035 shadow_tag_warned (specs
, pedantic
);
2040 /* Support for unnamed structs or unions as members of
2041 structs or unions (which is [a] useful and [b] supports
2043 ret
= grokfield (build_id_declarator (NULL_TREE
), specs
, NULL_TREE
);
2047 pending_xref_error ();
2048 prefix_attrs
= specs
->attrs
;
2049 all_prefix_attrs
= prefix_attrs
;
2050 specs
->attrs
= NULL_TREE
;
2054 /* Declaring one or more declarators or un-named bit-fields. */
2055 struct c_declarator
*declarator
;
2057 if (c_parser_next_token_is (parser
, CPP_COLON
))
2058 declarator
= build_id_declarator (NULL_TREE
);
2060 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2061 C_DTR_NORMAL
, &dummy
);
2062 if (declarator
== NULL
)
2064 c_parser_skip_to_end_of_block_or_statement (parser
);
2067 if (c_parser_next_token_is (parser
, CPP_COLON
)
2068 || c_parser_next_token_is (parser
, CPP_COMMA
)
2069 || c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2070 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
)
2071 || c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2073 tree postfix_attrs
= NULL_TREE
;
2074 tree width
= NULL_TREE
;
2076 if (c_parser_next_token_is (parser
, CPP_COLON
))
2078 c_parser_consume_token (parser
);
2079 width
= c_parser_expr_no_commas (parser
, NULL
).value
;
2081 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2082 postfix_attrs
= c_parser_attributes (parser
);
2083 d
= grokfield (declarator
, specs
, width
);
2084 decl_attributes (&d
, chainon (postfix_attrs
,
2085 all_prefix_attrs
), 0);
2086 TREE_CHAIN (d
) = decls
;
2088 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2089 all_prefix_attrs
= chainon (c_parser_attributes (parser
),
2092 all_prefix_attrs
= prefix_attrs
;
2093 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2094 c_parser_consume_token (parser
);
2095 else if (c_parser_next_token_is (parser
, CPP_SEMICOLON
)
2096 || c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
2098 /* Semicolon consumed in caller. */
2103 c_parser_error (parser
, "expected %<,%>, %<;%> or %<}%>");
2109 c_parser_error (parser
,
2110 "expected %<:%>, %<,%>, %<;%>, %<}%> or "
2111 "%<__attribute__%>");
2118 /* Parse a typeof specifier (a GNU extension).
2121 typeof ( expression )
2122 typeof ( type-name )
2125 static struct c_typespec
2126 c_parser_typeof_specifier (c_parser
*parser
)
2128 struct c_typespec ret
;
2129 ret
.kind
= ctsk_typeof
;
2130 ret
.spec
= error_mark_node
;
2131 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_TYPEOF
));
2132 c_parser_consume_token (parser
);
2135 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2141 if (c_parser_next_token_starts_typename (parser
))
2143 struct c_type_name
*type
= c_parser_type_name (parser
);
2148 ret
.spec
= groktypename (type
);
2149 pop_maybe_used (variably_modified_type_p (ret
.spec
, NULL_TREE
));
2155 struct c_expr expr
= c_parser_expression (parser
);
2158 if (TREE_CODE (expr
.value
) == COMPONENT_REF
2159 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
2160 error ("%<typeof%> applied to a bit-field");
2161 ret
.spec
= TREE_TYPE (expr
.value
);
2162 was_vm
= variably_modified_type_p (ret
.spec
, NULL_TREE
);
2163 /* This should be returned with the type so that when the type
2164 is evaluated, this can be evaluated. For now, we avoid
2165 evaluation when the context might. */
2166 if (!skip_evaluation
&& was_vm
)
2168 tree e
= expr
.value
;
2170 /* If the expression is not of a type to which we cannot assign a line
2171 number, wrap the thing in a no-op NOP_EXPR. */
2172 if (DECL_P (e
) || CONSTANT_CLASS_P (e
))
2173 e
= build1 (NOP_EXPR
, void_type_node
, e
);
2176 SET_EXPR_LOCATION (e
, input_location
);
2180 pop_maybe_used (was_vm
);
2182 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
2186 /* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
2187 6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
2188 be redeclared; otherwise it may not. KIND indicates which kind of
2189 declarator is wanted. Returns a valid declarator except in the
2190 case of a syntax error in which case NULL is returned. *SEEN_ID is
2191 set to true if an identifier being declared is seen; this is used
2192 to diagnose bad forms of abstract array declarators and to
2193 determine whether an identifier list is syntactically permitted.
2196 pointer[opt] direct-declarator
2200 ( attributes[opt] declarator )
2201 direct-declarator array-declarator
2202 direct-declarator ( parameter-type-list )
2203 direct-declarator ( identifier-list[opt] )
2206 * type-qualifier-list[opt]
2207 * type-qualifier-list[opt] pointer
2209 type-qualifier-list:
2212 type-qualifier-list type-qualifier
2213 type-qualifier-list attributes
2215 parameter-type-list:
2217 parameter-list , ...
2220 parameter-declaration
2221 parameter-list , parameter-declaration
2223 parameter-declaration:
2224 declaration-specifiers declarator attributes[opt]
2225 declaration-specifiers abstract-declarator[opt] attributes[opt]
2229 identifier-list , identifier
2231 abstract-declarator:
2233 pointer[opt] direct-abstract-declarator
2235 direct-abstract-declarator:
2236 ( attributes[opt] abstract-declarator )
2237 direct-abstract-declarator[opt] array-declarator
2238 direct-abstract-declarator[opt] ( parameter-type-list[opt] )
2243 direct-declarator ( parameter-forward-declarations
2244 parameter-type-list[opt] )
2246 direct-abstract-declarator:
2247 direct-abstract-declarator[opt] ( parameter-forward-declarations
2248 parameter-type-list[opt] )
2250 parameter-forward-declarations:
2252 parameter-forward-declarations parameter-list ;
2254 The uses of attributes shown above are GNU extensions.
2256 Some forms of array declarator are not included in C99 in the
2257 syntax for abstract declarators; these are disallowed elsewhere.
2258 This may be a defect (DR#289).
2260 This function also accepts an omitted abstract declarator as being
2261 an abstract declarator, although not part of the formal syntax. */
2263 static struct c_declarator
*
2264 c_parser_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2267 /* Parse any initial pointer part. */
2268 if (c_parser_next_token_is (parser
, CPP_MULT
))
2270 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2271 struct c_declarator
*inner
;
2272 c_parser_consume_token (parser
);
2273 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2274 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2278 return make_pointer_declarator (quals_attrs
, inner
);
2280 /* Now we have a direct declarator, direct abstract declarator or
2281 nothing (which counts as a direct abstract declarator here). */
2282 return c_parser_direct_declarator (parser
, type_seen_p
, kind
, seen_id
);
2285 /* Parse a direct declarator or direct abstract declarator; arguments
2286 as c_parser_declarator. */
2288 static struct c_declarator
*
2289 c_parser_direct_declarator (c_parser
*parser
, bool type_seen_p
, c_dtr_syn kind
,
2292 /* The direct declarator must start with an identifier (possibly
2293 omitted) or a parenthesized declarator (possibly abstract). In
2294 an ordinary declarator, initial parentheses must start a
2295 parenthesized declarator. In an abstract declarator or parameter
2296 declarator, they could start a parenthesized declarator or a
2297 parameter list. To tell which, the open parenthesis and any
2298 following attributes must be read. If a declaration specifier
2299 follows, then it is a parameter list; if the specifier is a
2300 typedef name, there might be an ambiguity about redeclaring it,
2301 which is resolved in the direction of treating it as a typedef
2302 name. If a close parenthesis follows, it is also an empty
2303 parameter list, as the syntax does not permit empty abstract
2304 declarators. Otherwise, it is a parenthesized declarator (in
2305 which case the analysis may be repeated inside it, recursively).
2307 ??? There is an ambiguity in a parameter declaration "int
2308 (__attribute__((foo)) x)", where x is not a typedef name: it
2309 could be an abstract declarator for a function, or declare x with
2310 parentheses. The proper resolution of this ambiguity needs
2311 documenting. At present we follow an accident of the old
2312 parser's implementation, whereby the first parameter must have
2313 some declaration specifiers other than just attributes. Thus as
2314 a parameter declaration it is treated as a parenthesized
2315 parameter named x, and as an abstract declarator it is
2318 ??? Also following the old parser, attributes inside an empty
2319 parameter list are ignored, making it a list not yielding a
2320 prototype, rather than giving an error or making it have one
2321 parameter with implicit type int.
2323 ??? Also following the old parser, typedef names may be
2324 redeclared in declarators, but not Objective-C class names. */
2326 if (kind
!= C_DTR_ABSTRACT
2327 && c_parser_next_token_is (parser
, CPP_NAME
)
2329 && c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
)
2330 || c_parser_peek_token (parser
)->id_kind
== C_ID_ID
))
2332 struct c_declarator
*inner
2333 = build_id_declarator (c_parser_peek_token (parser
)->value
);
2335 inner
->id_loc
= c_parser_peek_token (parser
)->location
;
2336 c_parser_consume_token (parser
);
2337 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2340 if (kind
!= C_DTR_NORMAL
2341 && c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2343 struct c_declarator
*inner
= build_id_declarator (NULL_TREE
);
2344 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2347 /* Either we are at the end of an abstract declarator, or we have
2350 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2353 struct c_declarator
*inner
;
2354 c_parser_consume_token (parser
);
2355 attrs
= c_parser_attributes (parser
);
2356 if (kind
!= C_DTR_NORMAL
2357 && (c_parser_next_token_starts_declspecs (parser
)
2358 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
)))
2360 struct c_arg_info
*args
2361 = c_parser_parms_declarator (parser
, kind
== C_DTR_NORMAL
,
2368 = build_function_declarator (args
,
2369 build_id_declarator (NULL_TREE
));
2370 return c_parser_direct_declarator_inner (parser
, *seen_id
,
2374 /* A parenthesized declarator. */
2375 inner
= c_parser_declarator (parser
, type_seen_p
, kind
, seen_id
);
2376 if (inner
!= NULL
&& attrs
!= NULL
)
2377 inner
= build_attrs_declarator (attrs
, inner
);
2378 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2380 c_parser_consume_token (parser
);
2384 return c_parser_direct_declarator_inner (parser
, *seen_id
, inner
);
2388 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2395 if (kind
== C_DTR_NORMAL
)
2397 c_parser_error (parser
, "expected identifier or %<(%>");
2401 return build_id_declarator (NULL_TREE
);
2405 /* Parse part of a direct declarator or direct abstract declarator,
2406 given that some (in INNER) has already been parsed; ID_PRESENT is
2407 true if an identifier is present, false for an abstract
2410 static struct c_declarator
*
2411 c_parser_direct_declarator_inner (c_parser
*parser
, bool id_present
,
2412 struct c_declarator
*inner
)
2414 /* Parse a sequence of array declarators and parameter lists. */
2415 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
2417 struct c_declarator
*declarator
;
2418 struct c_declspecs
*quals_attrs
= build_null_declspecs ();
2422 c_parser_consume_token (parser
);
2423 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2424 static_seen
= c_parser_next_token_is_keyword (parser
, RID_STATIC
);
2426 c_parser_consume_token (parser
);
2427 if (static_seen
&& !quals_attrs
->declspecs_seen_p
)
2428 c_parser_declspecs (parser
, quals_attrs
, false, false, true);
2429 if (!quals_attrs
->declspecs_seen_p
)
2431 /* If "static" is present, there must be an array dimension.
2432 Otherwise, there may be a dimension, "*", or no
2437 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2441 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2446 else if (c_parser_next_token_is (parser
, CPP_MULT
))
2448 if (c_parser_peek_2nd_token (parser
)->type
== CPP_CLOSE_SQUARE
)
2452 c_parser_consume_token (parser
);
2457 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2463 dimen
= c_parser_expr_no_commas (parser
, NULL
).value
;
2466 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
2467 c_parser_consume_token (parser
);
2470 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
2474 declarator
= build_array_declarator (dimen
, quals_attrs
, static_seen
,
2476 if (declarator
== NULL
)
2478 inner
= set_array_declarator_inner (declarator
, inner
, !id_present
);
2479 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2481 else if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
2484 struct c_arg_info
*args
;
2485 c_parser_consume_token (parser
);
2486 attrs
= c_parser_attributes (parser
);
2487 args
= c_parser_parms_declarator (parser
, id_present
, attrs
);
2492 inner
= build_function_declarator (args
, inner
);
2493 return c_parser_direct_declarator_inner (parser
, id_present
, inner
);
2499 /* Parse a parameter list or identifier list, including the closing
2500 parenthesis but not the opening one. ATTRS are the attributes at
2501 the start of the list. ID_LIST_OK is true if an identifier list is
2502 acceptable; such a list must not have attributes at the start. */
2504 static struct c_arg_info
*
2505 c_parser_parms_declarator (c_parser
*parser
, bool id_list_ok
, tree attrs
)
2508 declare_parm_level ();
2509 /* If the list starts with an identifier, it is an identifier list.
2510 Otherwise, it is either a prototype list or an empty list. */
2513 && c_parser_next_token_is (parser
, CPP_NAME
)
2514 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2516 tree list
= NULL_TREE
, *nextp
= &list
;
2517 while (c_parser_next_token_is (parser
, CPP_NAME
)
2518 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
2520 *nextp
= build_tree_list (NULL_TREE
,
2521 c_parser_peek_token (parser
)->value
);
2522 nextp
= & TREE_CHAIN (*nextp
);
2523 c_parser_consume_token (parser
);
2524 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
2526 c_parser_consume_token (parser
);
2527 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2529 c_parser_error (parser
, "expected identifier");
2533 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2535 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
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
->had_vla_unspec
= 0;
2583 c_parser_consume_token (parser
);
2586 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2588 struct c_arg_info
*ret
= XOBNEW (&parser_obstack
, struct c_arg_info
);
2592 ret
->had_vla_unspec
= 0;
2593 /* Suppress -Wold-style-definition for this case. */
2594 ret
->types
= error_mark_node
;
2595 error ("ISO C requires a named argument before %<...%>");
2596 c_parser_consume_token (parser
);
2597 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2599 c_parser_consume_token (parser
);
2604 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2609 /* Nonempty list of parameters, either terminated with semicolon
2610 (forward declarations; recurse) or with close parenthesis (normal
2611 function) or with ", ... )" (variadic function). */
2614 /* Parse a parameter. */
2615 struct c_parm
*parm
= c_parser_parameter_declaration (parser
, attrs
);
2620 push_parm_decl (parm
);
2622 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
2625 c_parser_consume_token (parser
);
2626 mark_forward_parm_decls ();
2627 new_attrs
= c_parser_attributes (parser
);
2628 return c_parser_parms_list_declarator (parser
, new_attrs
);
2630 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2632 c_parser_consume_token (parser
);
2634 return get_parm_info (false);
2637 struct c_arg_info
*ret
2638 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2643 ret
->had_vla_unspec
= 0;
2647 if (!c_parser_require (parser
, CPP_COMMA
,
2648 "expected %<;%>, %<,%> or %<)%>"))
2650 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2653 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
2655 c_parser_consume_token (parser
);
2656 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2658 c_parser_consume_token (parser
);
2660 return get_parm_info (true);
2663 struct c_arg_info
*ret
2664 = XOBNEW (&parser_obstack
, struct c_arg_info
);
2669 ret
->had_vla_unspec
= 0;
2675 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2683 /* Parse a parameter declaration. ATTRS are the attributes at the
2684 start of the declaration if it is the first parameter. */
2686 static struct c_parm
*
2687 c_parser_parameter_declaration (c_parser
*parser
, tree attrs
)
2689 struct c_declspecs
*specs
;
2690 struct c_declarator
*declarator
;
2692 tree postfix_attrs
= NULL_TREE
;
2694 if (!c_parser_next_token_starts_declspecs (parser
))
2696 /* ??? In some Objective-C cases '...' isn't applicable so there
2697 should be a different message. */
2698 c_parser_error (parser
,
2699 "expected declaration specifiers or %<...%>");
2700 c_parser_skip_to_end_of_parameter (parser
);
2703 specs
= build_null_declspecs ();
2706 declspecs_add_attrs (specs
, attrs
);
2709 c_parser_declspecs (parser
, specs
, true, true, true);
2710 finish_declspecs (specs
);
2711 pending_xref_error ();
2712 prefix_attrs
= specs
->attrs
;
2713 specs
->attrs
= NULL_TREE
;
2714 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2715 C_DTR_PARM
, &dummy
);
2716 if (declarator
== NULL
)
2718 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
2721 if (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2722 postfix_attrs
= c_parser_attributes (parser
);
2723 return build_c_parm (specs
, chainon (postfix_attrs
, prefix_attrs
),
2727 /* Parse a string literal in an asm expression. It should not be
2728 translated, and wide string literals are an error although
2729 permitted by the syntax. This is a GNU extension.
2734 ??? At present, following the old parser, the caller needs to have
2735 set c_lex_string_translate to 0. It would be better to follow the
2736 C++ parser rather than using the c_lex_string_translate kludge. */
2739 c_parser_asm_string_literal (c_parser
*parser
)
2742 if (c_parser_next_token_is (parser
, CPP_STRING
))
2744 str
= c_parser_peek_token (parser
)->value
;
2745 c_parser_consume_token (parser
);
2747 else if (c_parser_next_token_is (parser
, CPP_WSTRING
))
2749 error ("wide string literal in %<asm%>");
2750 str
= build_string (1, "");
2751 c_parser_consume_token (parser
);
2755 c_parser_error (parser
, "expected string literal");
2761 /* Parse a simple asm expression. This is used in restricted
2762 contexts, where a full expression with inputs and outputs does not
2763 make sense. This is a GNU extension.
2766 asm ( asm-string-literal )
2770 c_parser_simple_asm_expr (c_parser
*parser
)
2773 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
2774 /* ??? Follow the C++ parser rather than using the
2775 c_lex_string_translate kludge. */
2776 c_lex_string_translate
= 0;
2777 c_parser_consume_token (parser
);
2778 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2780 c_lex_string_translate
= 1;
2783 str
= c_parser_asm_string_literal (parser
);
2784 c_lex_string_translate
= 1;
2785 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
2787 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2793 /* Parse (possibly empty) attributes. This is a GNU extension.
2797 attributes attribute
2800 __attribute__ ( ( attribute-list ) )
2804 attribute_list , attrib
2809 any-word ( identifier )
2810 any-word ( identifier , nonempty-expr-list )
2811 any-word ( expr-list )
2813 where the "identifier" must not be declared as a type, and
2814 "any-word" may be any identifier (including one declared as a
2815 type), a reserved word storage class specifier, type specifier or
2816 type qualifier. ??? This still leaves out most reserved keywords
2817 (following the old parser), shouldn't we include them, and why not
2818 allow identifiers declared as types to start the arguments? */
2821 c_parser_attributes (c_parser
*parser
)
2823 tree attrs
= NULL_TREE
;
2824 while (c_parser_next_token_is_keyword (parser
, RID_ATTRIBUTE
))
2826 /* ??? Follow the C++ parser rather than using the
2827 c_lex_string_translate kludge. */
2828 c_lex_string_translate
= 0;
2829 c_parser_consume_token (parser
);
2830 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2832 c_lex_string_translate
= 1;
2835 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
2837 c_lex_string_translate
= 1;
2838 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
2841 /* Parse the attribute list. */
2842 while (c_parser_next_token_is (parser
, CPP_COMMA
)
2843 || c_parser_next_token_is (parser
, CPP_NAME
)
2844 || c_parser_next_token_is (parser
, CPP_KEYWORD
))
2846 tree attr
, attr_name
, attr_args
;
2847 if (c_parser_next_token_is (parser
, CPP_COMMA
))
2849 c_parser_consume_token (parser
);
2852 if (c_parser_next_token_is (parser
, CPP_KEYWORD
))
2854 /* ??? See comment above about what keywords are
2857 switch (c_parser_peek_token (parser
)->keyword
)
2892 attr_name
= c_parser_peek_token (parser
)->value
;
2893 c_parser_consume_token (parser
);
2894 if (c_parser_next_token_is_not (parser
, CPP_OPEN_PAREN
))
2896 attr
= build_tree_list (attr_name
, NULL_TREE
);
2897 attrs
= chainon (attrs
, attr
);
2900 c_parser_consume_token (parser
);
2901 /* Parse the attribute contents. If they start with an
2902 identifier which is followed by a comma or close
2903 parenthesis, then the arguments start with that
2904 identifier; otherwise they are an expression list. */
2905 if (c_parser_next_token_is (parser
, CPP_NAME
)
2906 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
2907 && ((c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
)
2908 || (c_parser_peek_2nd_token (parser
)->type
2909 == CPP_CLOSE_PAREN
)))
2911 tree arg1
= c_parser_peek_token (parser
)->value
;
2912 c_parser_consume_token (parser
);
2913 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2914 attr_args
= build_tree_list (NULL_TREE
, arg1
);
2917 c_parser_consume_token (parser
);
2918 attr_args
= tree_cons (NULL_TREE
, arg1
,
2919 c_parser_expr_list (parser
, false));
2924 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2925 attr_args
= NULL_TREE
;
2927 attr_args
= c_parser_expr_list (parser
, false);
2929 attr
= build_tree_list (attr_name
, attr_args
);
2930 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2931 c_parser_consume_token (parser
);
2934 c_lex_string_translate
= 1;
2935 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2939 attrs
= chainon (attrs
, attr
);
2941 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2942 c_parser_consume_token (parser
);
2945 c_lex_string_translate
= 1;
2946 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2950 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
2951 c_parser_consume_token (parser
);
2954 c_lex_string_translate
= 1;
2955 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
2959 c_lex_string_translate
= 1;
2964 /* Parse a type name (C90 6.5.5, C99 6.7.6).
2967 specifier-qualifier-list abstract-declarator[opt]
2970 static struct c_type_name
*
2971 c_parser_type_name (c_parser
*parser
)
2973 struct c_declspecs
*specs
= build_null_declspecs ();
2974 struct c_declarator
*declarator
;
2975 struct c_type_name
*ret
;
2977 c_parser_declspecs (parser
, specs
, false, true, true);
2978 if (!specs
->declspecs_seen_p
)
2980 c_parser_error (parser
, "expected specifier-qualifier-list");
2983 pending_xref_error ();
2984 finish_declspecs (specs
);
2985 declarator
= c_parser_declarator (parser
, specs
->type_seen_p
,
2986 C_DTR_ABSTRACT
, &dummy
);
2987 if (declarator
== NULL
)
2989 ret
= XOBNEW (&parser_obstack
, struct c_type_name
);
2991 ret
->declarator
= declarator
;
2995 /* Parse an initializer (C90 6.5.7, C99 6.7.8).
2998 assignment-expression
2999 { initializer-list }
3000 { initializer-list , }
3003 designation[opt] initializer
3004 initializer-list , designation[opt] initializer
3011 designator-list designator
3018 [ constant-expression ]
3030 [ constant-expression ... constant-expression ]
3032 Any expression without commas is accepted in the syntax for the
3033 constant-expressions, with non-constant expressions rejected later.
3035 This function is only used for top-level initializers; for nested
3036 ones, see c_parser_initval. */
3038 static struct c_expr
3039 c_parser_initializer (c_parser
*parser
)
3041 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
3042 return c_parser_braced_init (parser
, NULL_TREE
, false);
3046 ret
= c_parser_expr_no_commas (parser
, NULL
);
3047 if (TREE_CODE (ret
.value
) != STRING_CST
3048 && TREE_CODE (ret
.value
) != COMPOUND_LITERAL_EXPR
)
3049 ret
= default_function_array_conversion (ret
);
3054 /* Parse a braced initializer list. TYPE is the type specified for a
3055 compound literal, and NULL_TREE for other initializers and for
3056 nested braced lists. NESTED_P is true for nested braced lists,
3057 false for the list of a compound literal or the list that is the
3058 top-level initializer in a declaration. */
3060 static struct c_expr
3061 c_parser_braced_init (c_parser
*parser
, tree type
, bool nested_p
)
3063 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
3064 c_parser_consume_token (parser
);
3066 push_init_level (0);
3068 really_start_incremental_init (type
);
3069 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3072 pedwarn ("ISO C forbids empty initializer braces");
3076 /* Parse a non-empty initializer list, possibly with a trailing
3080 c_parser_initelt (parser
);
3083 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3084 c_parser_consume_token (parser
);
3087 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3091 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3094 ret
.value
= error_mark_node
;
3095 ret
.original_code
= ERROR_MARK
;
3096 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, "expected %<}%>");
3099 c_parser_consume_token (parser
);
3100 return pop_init_level (0);
3103 /* Parse a nested initializer, including designators. */
3106 c_parser_initelt (c_parser
*parser
)
3108 /* Parse any designator or designator list. A single array
3109 designator may have the subsequent "=" omitted in GNU C, but a
3110 longer list or a structure member designator may not. */
3111 if (c_parser_next_token_is (parser
, CPP_NAME
)
3112 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
)
3114 /* Old-style structure member designator. */
3115 set_init_label (c_parser_peek_token (parser
)->value
);
3117 pedwarn ("obsolete use of designated initializer with %<:%>");
3118 c_parser_consume_token (parser
);
3119 c_parser_consume_token (parser
);
3123 /* des_seen is 0 if there have been no designators, 1 if there
3124 has been a single array designator and 2 otherwise. */
3126 while (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
)
3127 || c_parser_next_token_is (parser
, CPP_DOT
))
3129 int des_prev
= des_seen
;
3132 if (c_parser_next_token_is (parser
, CPP_DOT
))
3135 c_parser_consume_token (parser
);
3136 if (c_parser_next_token_is (parser
, CPP_NAME
))
3138 set_init_label (c_parser_peek_token (parser
)->value
);
3139 c_parser_consume_token (parser
);
3144 init
.value
= error_mark_node
;
3145 init
.original_code
= ERROR_MARK
;
3146 c_parser_error (parser
, "expected identifier");
3147 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3148 process_init_element (init
);
3155 /* ??? Following the old parser, [ objc-receiver
3156 objc-message-args ] is accepted as an initializer,
3157 being distinguished from a designator by what follows
3158 the first assignment expression inside the square
3159 brackets, but after a first array designator a
3160 subsequent square bracket is for Objective-C taken to
3161 start an expression, using the obsolete form of
3162 designated initializer without '=', rather than
3163 possibly being a second level of designation: in LALR
3164 terms, the '[' is shifted rather than reducing
3165 designator to designator-list. */
3166 if (des_prev
== 1 && c_dialect_objc ())
3168 des_seen
= des_prev
;
3171 if (des_prev
== 0 && c_dialect_objc ())
3173 /* This might be an array designator or an
3174 Objective-C message expression. If the former,
3175 continue parsing here; if the latter, parse the
3176 remainder of the initializer given the starting
3177 primary-expression. ??? It might make sense to
3178 distinguish when des_prev == 1 as well; see
3179 previous comment. */
3181 struct c_expr mexpr
;
3182 c_parser_consume_token (parser
);
3183 if (c_parser_peek_token (parser
)->type
== CPP_NAME
3184 && ((c_parser_peek_token (parser
)->id_kind
3186 || (c_parser_peek_token (parser
)->id_kind
3187 == C_ID_CLASSNAME
)))
3189 /* Type name receiver. */
3190 tree id
= c_parser_peek_token (parser
)->value
;
3191 c_parser_consume_token (parser
);
3192 rec
= objc_get_class_reference (id
);
3193 goto parse_message_args
;
3195 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3196 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
)
3197 || c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3198 goto array_desig_after_first
;
3199 /* Expression receiver. So far only one part
3200 without commas has been parsed; there might be
3201 more of the expression. */
3203 while (c_parser_next_token_is (parser
, CPP_COMMA
))
3206 c_parser_consume_token (parser
);
3207 next
= c_parser_expr_no_commas (parser
, NULL
);
3208 next
= default_function_array_conversion (next
);
3209 rec
= build_compound_expr (rec
, next
.value
);
3212 /* Now parse the objc-message-args. */
3213 args
= c_parser_objc_message_args (parser
);
3214 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3217 = objc_build_message_expr (build_tree_list (rec
, args
));
3218 mexpr
.original_code
= ERROR_MARK
;
3219 /* Now parse and process the remainder of the
3220 initializer, starting with this message
3221 expression as a primary-expression. */
3222 c_parser_initval (parser
, &mexpr
);
3225 c_parser_consume_token (parser
);
3226 first
= c_parser_expr_no_commas (parser
, NULL
).value
;
3227 array_desig_after_first
:
3228 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3230 c_parser_consume_token (parser
);
3231 second
= c_parser_expr_no_commas (parser
, NULL
).value
;
3235 if (c_parser_next_token_is (parser
, CPP_CLOSE_SQUARE
))
3237 c_parser_consume_token (parser
);
3238 set_init_index (first
, second
);
3239 if (pedantic
&& second
)
3240 pedwarn ("ISO C forbids specifying range of "
3241 "elements to initialize");
3244 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
3250 if (c_parser_next_token_is (parser
, CPP_EQ
))
3252 if (pedantic
&& !flag_isoc99
)
3253 pedwarn ("ISO C90 forbids specifying subobject to initialize");
3254 c_parser_consume_token (parser
);
3261 pedwarn ("obsolete use of designated initializer "
3267 init
.value
= error_mark_node
;
3268 init
.original_code
= ERROR_MARK
;
3269 c_parser_error (parser
, "expected %<=%>");
3270 c_parser_skip_until_found (parser
, CPP_COMMA
, NULL
);
3271 process_init_element (init
);
3277 c_parser_initval (parser
, NULL
);
3280 /* Parse a nested initializer; as c_parser_initializer but parses
3281 initializers within braced lists, after any designators have been
3282 applied. If AFTER is not NULL then it is an Objective-C message
3283 expression which is the primary-expression starting the
3287 c_parser_initval (c_parser
*parser
, struct c_expr
*after
)
3290 gcc_assert (!after
|| c_dialect_objc ());
3291 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
) && !after
)
3292 init
= c_parser_braced_init (parser
, NULL_TREE
, true);
3295 init
= c_parser_expr_no_commas (parser
, after
);
3296 if (init
.value
!= NULL_TREE
3297 && TREE_CODE (init
.value
) != STRING_CST
3298 && TREE_CODE (init
.value
) != COMPOUND_LITERAL_EXPR
)
3299 init
= default_function_array_conversion (init
);
3301 process_init_element (init
);
3304 /* Parse a compound statement (possibly a function body) (C90 6.6.2,
3308 { block-item-list[opt] }
3309 { label-declarations block-item-list }
3313 block-item-list block-item
3325 { label-declarations block-item-list }
3328 __extension__ nested-declaration
3329 nested-function-definition
3333 label-declarations label-declaration
3336 __label__ identifier-list ;
3338 Allowing the mixing of declarations and code is new in C99. The
3339 GNU syntax also permits (not shown above) labels at the end of
3340 compound statements, which yield an error. We don't allow labels
3341 on declarations; this might seem like a natural extension, but
3342 there would be a conflict between attributes on the label and
3343 prefix attributes on the declaration. ??? The syntax follows the
3344 old parser in requiring something after label declarations.
3345 Although they are erroneous if the labels declared aren't defined,
3346 is it useful for the syntax to be this way?
3358 c_parser_compound_statement (c_parser
*parser
)
3361 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
3362 return error_mark_node
;
3363 stmt
= c_begin_compound_stmt (true);
3364 c_parser_compound_statement_nostart (parser
);
3365 return c_end_compound_stmt (stmt
, true);
3368 /* Parse a compound statement except for the opening brace. This is
3369 used for parsing both compound statements and statement expressions
3370 (which follow different paths to handling the opening). */
3373 c_parser_compound_statement_nostart (c_parser
*parser
)
3375 bool last_stmt
= false;
3376 bool last_label
= false;
3377 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3379 c_parser_consume_token (parser
);
3382 if (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3384 /* Read zero or more forward-declarations for labels that nested
3385 functions can jump to. */
3386 while (c_parser_next_token_is_keyword (parser
, RID_LABEL
))
3388 c_parser_consume_token (parser
);
3389 /* Any identifiers, including those declared as type names,
3394 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
3396 c_parser_error (parser
, "expected identifier");
3400 = declare_label (c_parser_peek_token (parser
)->value
);
3401 C_DECLARED_LABEL_FLAG (label
) = 1;
3402 add_stmt (build_stmt (DECL_EXPR
, label
));
3403 c_parser_consume_token (parser
);
3404 if (c_parser_next_token_is (parser
, CPP_COMMA
))
3405 c_parser_consume_token (parser
);
3409 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3411 /* ??? Locating this diagnostic on the token after the
3412 declarations end follows the old parser, but it might be
3413 better to locate it where the declarations start instead. */
3415 pedwarn ("ISO C forbids label declarations");
3417 /* We must now have at least one statement, label or declaration. */
3418 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
3420 c_parser_error (parser
, "expected declaration or statement");
3421 c_parser_consume_token (parser
);
3424 while (c_parser_next_token_is_not (parser
, CPP_CLOSE_BRACE
))
3426 location_t loc
= c_parser_peek_token (parser
)->location
;
3427 if (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3428 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3429 || (c_parser_next_token_is (parser
, CPP_NAME
)
3430 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3434 c_parser_label (parser
);
3436 else if (!last_label
3437 && c_parser_next_token_starts_declspecs (parser
))
3440 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3442 && ((pedantic
&& !flag_isoc99
)
3443 || warn_declaration_after_statement
))
3444 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3448 else if (!last_label
3449 && c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
3451 /* __extension__ can start a declaration, but is also an
3452 unary operator that can start an expression. Consume all
3453 but the last of a possible series of __extension__ to
3455 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
3456 && (c_parser_peek_2nd_token (parser
)->keyword
3458 c_parser_consume_token (parser
);
3459 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
3462 ext
= disable_extension_diagnostics ();
3463 c_parser_consume_token (parser
);
3465 c_parser_declaration_or_fndef (parser
, true, true, true, true);
3466 /* Following the old parser, __extension__ does not
3467 disable this diagnostic. */
3468 restore_extension_diagnostics (ext
);
3470 && ((pedantic
&& !flag_isoc99
)
3471 || warn_declaration_after_statement
))
3472 pedwarn_c90 ("%HISO C90 forbids mixed declarations and code",
3479 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
3481 /* External pragmas, and some omp pragmas, are not associated
3482 with regular c code, and so are not to be considered statements
3483 syntactically. This ensures that the user doesn't put them
3484 places that would turn into syntax errors if the directive
3486 if (c_parser_pragma (parser
, pragma_compound
))
3487 last_label
= false, last_stmt
= true;
3489 else if (c_parser_next_token_is (parser
, CPP_EOF
))
3491 c_parser_error (parser
, "expected declaration or statement");
3499 c_parser_statement_after_labels (parser
);
3503 error ("label at end of compound statement");
3504 c_parser_consume_token (parser
);
3507 /* Parse a label (C90 6.6.1, C99 6.8.1).
3510 identifier : attributes[opt]
3511 case constant-expression :
3517 case constant-expression ... constant-expression :
3519 The use of attributes on labels is a GNU extension. The syntax in
3520 GNU C accepts any expressions without commas, non-constant
3521 expressions being rejected later. */
3524 c_parser_label (c_parser
*parser
)
3526 location_t loc1
= c_parser_peek_token (parser
)->location
;
3527 tree label
= NULL_TREE
;
3528 if (c_parser_next_token_is_keyword (parser
, RID_CASE
))
3531 c_parser_consume_token (parser
);
3532 exp1
= c_parser_expr_no_commas (parser
, NULL
).value
;
3533 if (c_parser_next_token_is (parser
, CPP_COLON
))
3535 c_parser_consume_token (parser
);
3536 label
= do_case (exp1
, NULL_TREE
);
3538 else if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
3540 c_parser_consume_token (parser
);
3541 exp2
= c_parser_expr_no_commas (parser
, NULL
).value
;
3542 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3543 label
= do_case (exp1
, exp2
);
3546 c_parser_error (parser
, "expected %<:%> or %<...%>");
3548 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
3550 c_parser_consume_token (parser
);
3551 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
3552 label
= do_case (NULL_TREE
, NULL_TREE
);
3556 tree name
= c_parser_peek_token (parser
)->value
;
3560 gcc_assert (c_parser_next_token_is (parser
, CPP_NAME
));
3561 c_parser_consume_token (parser
);
3562 gcc_assert (c_parser_next_token_is (parser
, CPP_COLON
));
3563 loc2
= c_parser_peek_token (parser
)->location
;
3564 c_parser_consume_token (parser
);
3565 attrs
= c_parser_attributes (parser
);
3566 tlab
= define_label (loc2
, name
);
3569 decl_attributes (&tlab
, attrs
, 0);
3570 label
= add_stmt (build_stmt (LABEL_EXPR
, tlab
));
3574 SET_EXPR_LOCATION (label
, loc1
);
3577 /* Parse a statement (C90 6.6, C99 6.8).
3582 expression-statement
3590 expression-statement:
3593 selection-statement:
3597 iteration-statement:
3606 return expression[opt] ;
3619 objc-throw-statement
3620 objc-try-catch-statement
3621 objc-synchronized-statement
3623 objc-throw-statement:
3637 parallel-for-construct
3638 parallel-sections-construct
3645 parallel-directive structured-block
3648 for-directive iteration-statement
3651 sections-directive section-scope
3654 single-directive structured-block
3656 parallel-for-construct:
3657 parallel-for-directive iteration-statement
3659 parallel-sections-construct:
3660 parallel-sections-directive section-scope
3663 master-directive structured-block
3666 critical-directive structured-block
3669 atomic-directive expression-statement
3672 ordered-directive structured-block */
3675 c_parser_statement (c_parser
*parser
)
3677 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3678 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3679 || (c_parser_next_token_is (parser
, CPP_NAME
)
3680 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3681 c_parser_label (parser
);
3682 c_parser_statement_after_labels (parser
);
3685 /* Parse a statement, other than a labeled statement. */
3688 c_parser_statement_after_labels (c_parser
*parser
)
3690 location_t loc
= c_parser_peek_token (parser
)->location
;
3691 tree stmt
= NULL_TREE
;
3692 switch (c_parser_peek_token (parser
)->type
)
3694 case CPP_OPEN_BRACE
:
3695 add_stmt (c_parser_compound_statement (parser
));
3698 switch (c_parser_peek_token (parser
)->keyword
)
3701 c_parser_if_statement (parser
);
3704 c_parser_switch_statement (parser
);
3707 c_parser_while_statement (parser
);
3710 c_parser_do_statement (parser
);
3713 c_parser_for_statement (parser
);
3716 c_parser_consume_token (parser
);
3717 if (c_parser_next_token_is (parser
, CPP_NAME
))
3719 stmt
= c_finish_goto_label (c_parser_peek_token (parser
)->value
);
3720 c_parser_consume_token (parser
);
3722 else if (c_parser_next_token_is (parser
, CPP_MULT
))
3724 c_parser_consume_token (parser
);
3725 stmt
= c_finish_goto_ptr (c_parser_expression (parser
).value
);
3728 c_parser_error (parser
, "expected identifier or %<*%>");
3729 goto expect_semicolon
;
3731 c_parser_consume_token (parser
);
3732 stmt
= c_finish_bc_stmt (&c_cont_label
, false);
3733 goto expect_semicolon
;
3735 c_parser_consume_token (parser
);
3736 stmt
= c_finish_bc_stmt (&c_break_label
, true);
3737 goto expect_semicolon
;
3739 c_parser_consume_token (parser
);
3740 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3742 stmt
= c_finish_return (NULL_TREE
);
3743 c_parser_consume_token (parser
);
3747 stmt
= c_finish_return (c_parser_expression_conv (parser
).value
);
3748 goto expect_semicolon
;
3752 stmt
= c_parser_asm_statement (parser
);
3755 gcc_assert (c_dialect_objc ());
3756 c_parser_consume_token (parser
);
3757 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3759 stmt
= objc_build_throw_stmt (NULL_TREE
);
3760 c_parser_consume_token (parser
);
3765 = objc_build_throw_stmt (c_parser_expression (parser
).value
);
3766 goto expect_semicolon
;
3770 gcc_assert (c_dialect_objc ());
3771 c_parser_objc_try_catch_statement (parser
);
3773 case RID_AT_SYNCHRONIZED
:
3774 gcc_assert (c_dialect_objc ());
3775 c_parser_objc_synchronized_statement (parser
);
3782 c_parser_consume_token (parser
);
3784 case CPP_CLOSE_PAREN
:
3785 case CPP_CLOSE_SQUARE
:
3786 /* Avoid infinite loop in error recovery:
3787 c_parser_skip_until_found stops at a closing nesting
3788 delimiter without consuming it, but here we need to consume
3789 it to proceed further. */
3790 c_parser_error (parser
, "expected statement");
3791 c_parser_consume_token (parser
);
3794 c_parser_pragma (parser
, pragma_stmt
);
3798 stmt
= c_finish_expr_stmt (c_parser_expression_conv (parser
).value
);
3800 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
3803 /* Two cases cannot and do not have line numbers associated: If stmt
3804 is degenerate, such as "2;", then stmt is an INTEGER_CST, which
3805 cannot hold line numbers. But that's OK because the statement
3806 will either be changed to a MODIFY_EXPR during gimplification of
3807 the statement expr, or discarded. If stmt was compound, but
3808 without new variables, we will have skipped the creation of a
3809 BIND and will have a bare STATEMENT_LIST. But that's OK because
3810 (recursively) all of the component statements should already have
3811 line numbers assigned. ??? Can we discard no-op statements
3813 if (stmt
&& EXPR_P (stmt
))
3814 SET_EXPR_LOCATION (stmt
, loc
);
3817 /* Parse a parenthesized condition from an if, do or while statement.
3823 c_parser_paren_condition (c_parser
*parser
)
3827 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3828 return error_mark_node
;
3829 loc
= c_parser_peek_token (parser
)->location
;
3830 cond
= c_objc_common_truthvalue_conversion
3831 (c_parser_expression_conv (parser
).value
);
3833 SET_EXPR_LOCATION (cond
, loc
);
3834 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3838 /* Parse a statement which is a block in C99. */
3841 c_parser_c99_block_statement (c_parser
*parser
)
3843 tree block
= c_begin_compound_stmt (flag_isoc99
);
3844 c_parser_statement (parser
);
3845 return c_end_compound_stmt (block
, flag_isoc99
);
3848 /* Parse the body of an if statement or the else half thereof. This
3849 is just parsing a statement but (a) it is a block in C99, (b) we
3850 track whether the body is an if statement for the sake of
3851 -Wparentheses warnings, (c) we handle an empty body specially for
3852 the sake of -Wextra warnings. */
3855 c_parser_if_body (c_parser
*parser
, bool *if_p
)
3857 tree block
= c_begin_compound_stmt (flag_isoc99
);
3858 while (c_parser_next_token_is_keyword (parser
, RID_CASE
)
3859 || c_parser_next_token_is_keyword (parser
, RID_DEFAULT
)
3860 || (c_parser_next_token_is (parser
, CPP_NAME
)
3861 && c_parser_peek_2nd_token (parser
)->type
== CPP_COLON
))
3862 c_parser_label (parser
);
3863 *if_p
= c_parser_next_token_is_keyword (parser
, RID_IF
);
3864 if (extra_warnings
&& c_parser_next_token_is (parser
, CPP_SEMICOLON
))
3865 add_stmt (build_empty_stmt ());
3866 c_parser_statement_after_labels (parser
);
3867 return c_end_compound_stmt (block
, flag_isoc99
);
3870 /* Parse an if statement (C90 6.6.4, C99 6.8.4).
3873 if ( expression ) statement
3874 if ( expression ) statement else statement
3878 c_parser_if_statement (c_parser
*parser
)
3883 bool first_if
= false, second_if
= false;
3884 tree first_body
, second_body
;
3885 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_IF
));
3886 c_parser_consume_token (parser
);
3887 block
= c_begin_compound_stmt (flag_isoc99
);
3888 loc
= c_parser_peek_token (parser
)->location
;
3889 cond
= c_parser_paren_condition (parser
);
3890 first_body
= c_parser_if_body (parser
, &first_if
);
3891 if (c_parser_next_token_is_keyword (parser
, RID_ELSE
))
3893 c_parser_consume_token (parser
);
3894 second_body
= c_parser_if_body (parser
, &second_if
);
3897 second_body
= NULL_TREE
;
3898 c_finish_if_stmt (loc
, cond
, first_body
, second_body
, first_if
);
3899 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3902 /* Parse a switch statement (C90 6.6.4, C99 6.8.4).
3905 switch (expression) statement
3909 c_parser_switch_statement (c_parser
*parser
)
3911 tree block
, expr
, body
, save_break
;
3912 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SWITCH
));
3913 c_parser_consume_token (parser
);
3914 block
= c_begin_compound_stmt (flag_isoc99
);
3915 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
3917 expr
= c_parser_expression (parser
).value
;
3918 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
3921 expr
= error_mark_node
;
3922 c_start_case (expr
);
3923 save_break
= c_break_label
;
3924 c_break_label
= NULL_TREE
;
3925 body
= c_parser_c99_block_statement (parser
);
3926 c_finish_case (body
);
3928 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_break_label
));
3929 c_break_label
= save_break
;
3930 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3933 /* Parse a while statement (C90 6.6.5, C99 6.8.5).
3936 while (expression) statement
3940 c_parser_while_statement (c_parser
*parser
)
3942 tree block
, cond
, body
, save_break
, save_cont
;
3944 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_WHILE
));
3945 c_parser_consume_token (parser
);
3946 block
= c_begin_compound_stmt (flag_isoc99
);
3947 loc
= c_parser_peek_token (parser
)->location
;
3948 cond
= c_parser_paren_condition (parser
);
3949 save_break
= c_break_label
;
3950 c_break_label
= NULL_TREE
;
3951 save_cont
= c_cont_label
;
3952 c_cont_label
= NULL_TREE
;
3953 body
= c_parser_c99_block_statement (parser
);
3954 c_finish_loop (loc
, cond
, NULL
, body
, c_break_label
, c_cont_label
, true);
3955 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3956 c_break_label
= save_break
;
3957 c_cont_label
= save_cont
;
3960 /* Parse a do statement (C90 6.6.5, C99 6.8.5).
3963 do statement while ( expression ) ;
3967 c_parser_do_statement (c_parser
*parser
)
3969 tree block
, cond
, body
, save_break
, save_cont
, new_break
, new_cont
;
3971 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_DO
));
3972 c_parser_consume_token (parser
);
3973 block
= c_begin_compound_stmt (flag_isoc99
);
3974 loc
= c_parser_peek_token (parser
)->location
;
3975 save_break
= c_break_label
;
3976 c_break_label
= NULL_TREE
;
3977 save_cont
= c_cont_label
;
3978 c_cont_label
= NULL_TREE
;
3979 body
= c_parser_c99_block_statement (parser
);
3980 c_parser_require_keyword (parser
, RID_WHILE
, "expected %<while%>");
3981 new_break
= c_break_label
;
3982 c_break_label
= save_break
;
3983 new_cont
= c_cont_label
;
3984 c_cont_label
= save_cont
;
3985 cond
= c_parser_paren_condition (parser
);
3986 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
3987 c_parser_skip_to_end_of_block_or_statement (parser
);
3988 c_finish_loop (loc
, cond
, NULL
, body
, new_break
, new_cont
, false);
3989 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
3992 /* Parse a for statement (C90 6.6.5, C99 6.8.5).
3995 for ( expression[opt] ; expression[opt] ; expression[opt] ) statement
3996 for ( nested-declaration expression[opt] ; expression[opt] ) statement
3998 The form with a declaration is new in C99.
4000 ??? In accordance with the old parser, the declaration may be a
4001 nested function, which is then rejected in check_for_loop_decls,
4002 but does it make any sense for this to be included in the grammar?
4003 Note in particular that the nested function does not include a
4004 trailing ';', whereas the "declaration" production includes one.
4005 Also, can we reject bad declarations earlier and cheaper than
4006 check_for_loop_decls? */
4009 c_parser_for_statement (c_parser
*parser
)
4011 tree block
, cond
, incr
, save_break
, save_cont
, body
;
4013 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_FOR
));
4014 loc
= c_parser_peek_token (parser
)->location
;
4015 c_parser_consume_token (parser
);
4016 block
= c_begin_compound_stmt (flag_isoc99
);
4017 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4019 /* Parse the initialization declaration or expression. */
4020 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4022 c_parser_consume_token (parser
);
4023 c_finish_expr_stmt (NULL_TREE
);
4025 else if (c_parser_next_token_starts_declspecs (parser
))
4027 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4028 check_for_loop_decls ();
4030 else if (c_parser_next_token_is_keyword (parser
, RID_EXTENSION
))
4032 /* __extension__ can start a declaration, but is also an
4033 unary operator that can start an expression. Consume all
4034 but the last of a possible series of __extension__ to
4036 while (c_parser_peek_2nd_token (parser
)->type
== CPP_KEYWORD
4037 && (c_parser_peek_2nd_token (parser
)->keyword
4039 c_parser_consume_token (parser
);
4040 if (c_token_starts_declspecs (c_parser_peek_2nd_token (parser
)))
4043 ext
= disable_extension_diagnostics ();
4044 c_parser_consume_token (parser
);
4045 c_parser_declaration_or_fndef (parser
, true, true, true, true);
4046 restore_extension_diagnostics (ext
);
4047 check_for_loop_decls ();
4055 c_finish_expr_stmt (c_parser_expression (parser
).value
);
4056 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4058 /* Parse the loop condition. */
4059 loc
= c_parser_peek_token (parser
)->location
;
4060 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
4062 c_parser_consume_token (parser
);
4067 tree ocond
= c_parser_expression_conv (parser
).value
;
4068 cond
= c_objc_common_truthvalue_conversion (ocond
);
4070 SET_EXPR_LOCATION (cond
, loc
);
4071 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
4073 /* Parse the increment expression. */
4074 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4075 incr
= c_process_expr_stmt (NULL_TREE
);
4077 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
4078 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4082 cond
= error_mark_node
;
4083 incr
= error_mark_node
;
4085 save_break
= c_break_label
;
4086 c_break_label
= NULL_TREE
;
4087 save_cont
= c_cont_label
;
4088 c_cont_label
= NULL_TREE
;
4089 body
= c_parser_c99_block_statement (parser
);
4090 c_finish_loop (loc
, cond
, incr
, body
, c_break_label
, c_cont_label
, true);
4091 add_stmt (c_end_compound_stmt (block
, flag_isoc99
));
4092 c_break_label
= save_break
;
4093 c_cont_label
= save_cont
;
4096 /* Parse an asm statement, a GNU extension. This is a full-blown asm
4097 statement with inputs, outputs, clobbers, and volatile tag
4101 asm type-qualifier[opt] ( asm-argument ) ;
4105 asm-string-literal : asm-operands[opt]
4106 asm-string-literal : asm-operands[opt] : asm-operands[opt]
4107 asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers
4109 Qualifiers other than volatile are accepted in the syntax but
4113 c_parser_asm_statement (c_parser
*parser
)
4115 tree quals
, str
, outputs
, inputs
, clobbers
, ret
;
4117 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ASM
));
4118 c_parser_consume_token (parser
);
4119 if (c_parser_next_token_is_keyword (parser
, RID_VOLATILE
))
4121 quals
= c_parser_peek_token (parser
)->value
;
4122 c_parser_consume_token (parser
);
4124 else if (c_parser_next_token_is_keyword (parser
, RID_CONST
)
4125 || c_parser_next_token_is_keyword (parser
, RID_RESTRICT
))
4127 warning (0, "%E qualifier ignored on asm",
4128 c_parser_peek_token (parser
)->value
);
4130 c_parser_consume_token (parser
);
4134 /* ??? Follow the C++ parser rather than using the
4135 c_lex_string_translate kludge. */
4136 c_lex_string_translate
= 0;
4137 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4139 c_lex_string_translate
= 1;
4142 str
= c_parser_asm_string_literal (parser
);
4143 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4146 outputs
= NULL_TREE
;
4148 clobbers
= NULL_TREE
;
4151 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4153 c_lex_string_translate
= 1;
4154 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4158 /* Parse outputs. */
4159 if (c_parser_next_token_is (parser
, CPP_COLON
)
4160 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4161 outputs
= NULL_TREE
;
4163 outputs
= c_parser_asm_operands (parser
, false);
4164 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4167 clobbers
= NULL_TREE
;
4170 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4172 c_lex_string_translate
= 1;
4173 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4177 if (c_parser_next_token_is (parser
, CPP_COLON
)
4178 || c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4181 inputs
= c_parser_asm_operands (parser
, true);
4182 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
4184 clobbers
= NULL_TREE
;
4187 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%> or %<)%>"))
4189 c_lex_string_translate
= 1;
4190 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4193 /* Parse clobbers. */
4194 clobbers
= c_parser_asm_clobbers (parser
);
4196 c_lex_string_translate
= 1;
4197 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4199 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4202 if (!c_parser_require (parser
, CPP_SEMICOLON
, "expected %<;%>"))
4203 c_parser_skip_to_end_of_block_or_statement (parser
);
4204 ret
= build_asm_stmt (quals
, build_asm_expr (str
, outputs
, inputs
,
4209 /* Parse asm operands, a GNU extension. If CONVERT_P (for inputs but
4210 not outputs), apply the default conversion of functions and arrays
4215 asm-operands , asm-operand
4218 asm-string-literal ( expression )
4219 [ identifier ] asm-string-literal ( expression )
4223 c_parser_asm_operands (c_parser
*parser
, bool convert_p
)
4225 tree list
= NULL_TREE
;
4230 if (c_parser_next_token_is (parser
, CPP_OPEN_SQUARE
))
4232 c_parser_consume_token (parser
);
4233 if (c_parser_next_token_is (parser
, CPP_NAME
))
4235 tree id
= c_parser_peek_token (parser
)->value
;
4236 c_parser_consume_token (parser
);
4237 name
= build_string (IDENTIFIER_LENGTH (id
),
4238 IDENTIFIER_POINTER (id
));
4242 c_parser_error (parser
, "expected identifier");
4243 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
, NULL
);
4246 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
4251 str
= c_parser_asm_string_literal (parser
);
4252 if (str
== NULL_TREE
)
4254 c_lex_string_translate
= 1;
4255 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
4257 c_lex_string_translate
= 0;
4260 expr
= c_parser_expression (parser
);
4262 expr
= default_function_array_conversion (expr
);
4263 c_lex_string_translate
= 0;
4264 if (!c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>"))
4266 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
4269 list
= chainon (list
, build_tree_list (build_tree_list (name
, str
),
4271 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4272 c_parser_consume_token (parser
);
4279 /* Parse asm clobbers, a GNU extension.
4283 asm-clobbers , asm-string-literal
4287 c_parser_asm_clobbers (c_parser
*parser
)
4289 tree list
= NULL_TREE
;
4292 tree str
= c_parser_asm_string_literal (parser
);
4294 list
= tree_cons (NULL_TREE
, str
, list
);
4297 if (c_parser_next_token_is (parser
, CPP_COMMA
))
4298 c_parser_consume_token (parser
);
4305 /* Parse an expression other than a compound expression; that is, an
4306 assignment expression (C90 6.3.16, C99 6.5.16). If AFTER is not
4307 NULL then it is an Objective-C message expression which is the
4308 primary-expression starting the expression as an initializer.
4310 assignment-expression:
4311 conditional-expression
4312 unary-expression assignment-operator assignment-expression
4314 assignment-operator: one of
4315 = *= /= %= += -= <<= >>= &= ^= |=
4317 In GNU C we accept any conditional expression on the LHS and
4318 diagnose the invalid lvalue rather than producing a syntax
4321 static struct c_expr
4322 c_parser_expr_no_commas (c_parser
*parser
, struct c_expr
*after
)
4324 struct c_expr lhs
, rhs
, ret
;
4325 enum tree_code code
;
4326 gcc_assert (!after
|| c_dialect_objc ());
4327 lhs
= c_parser_conditional_expression (parser
, after
);
4328 switch (c_parser_peek_token (parser
)->type
)
4337 code
= TRUNC_DIV_EXPR
;
4340 code
= TRUNC_MOD_EXPR
;
4355 code
= BIT_AND_EXPR
;
4358 code
= BIT_XOR_EXPR
;
4361 code
= BIT_IOR_EXPR
;
4366 c_parser_consume_token (parser
);
4367 rhs
= c_parser_expr_no_commas (parser
, NULL
);
4368 rhs
= default_function_array_conversion (rhs
);
4369 ret
.value
= build_modify_expr (lhs
.value
, code
, rhs
.value
);
4370 if (code
== NOP_EXPR
)
4371 ret
.original_code
= MODIFY_EXPR
;
4374 TREE_NO_WARNING (ret
.value
) = 1;
4375 ret
.original_code
= ERROR_MARK
;
4380 /* Parse a conditional expression (C90 6.3.15, C99 6.5.15). If AFTER
4381 is not NULL then it is an Objective-C message expression which is
4382 the primary-expression starting the expression as an initializer.
4384 conditional-expression:
4385 logical-OR-expression
4386 logical-OR-expression ? expression : conditional-expression
4390 conditional-expression:
4391 logical-OR-expression ? : conditional-expression
4394 static struct c_expr
4395 c_parser_conditional_expression (c_parser
*parser
, struct c_expr
*after
)
4397 struct c_expr cond
, exp1
, exp2
, ret
;
4398 gcc_assert (!after
|| c_dialect_objc ());
4399 cond
= c_parser_binary_expression (parser
, after
);
4400 if (c_parser_next_token_is_not (parser
, CPP_QUERY
))
4402 cond
= default_function_array_conversion (cond
);
4403 c_parser_consume_token (parser
);
4404 if (c_parser_next_token_is (parser
, CPP_COLON
))
4407 pedwarn ("ISO C forbids omitting the middle term of a ?: expression");
4408 /* Make sure first operand is calculated only once. */
4409 exp1
.value
= save_expr (default_conversion (cond
.value
));
4410 cond
.value
= c_objc_common_truthvalue_conversion (exp1
.value
);
4411 skip_evaluation
+= cond
.value
== truthvalue_true_node
;
4416 = c_objc_common_truthvalue_conversion
4417 (default_conversion (cond
.value
));
4418 skip_evaluation
+= cond
.value
== truthvalue_false_node
;
4419 exp1
= c_parser_expression_conv (parser
);
4420 skip_evaluation
+= ((cond
.value
== truthvalue_true_node
)
4421 - (cond
.value
== truthvalue_false_node
));
4423 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
4425 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4426 ret
.value
= error_mark_node
;
4427 ret
.original_code
= ERROR_MARK
;
4430 exp2
= c_parser_conditional_expression (parser
, NULL
);
4431 exp2
= default_function_array_conversion (exp2
);
4432 skip_evaluation
-= cond
.value
== truthvalue_true_node
;
4433 ret
.value
= build_conditional_expr (cond
.value
, exp1
.value
, exp2
.value
);
4434 ret
.original_code
= ERROR_MARK
;
4438 /* Parse a binary expression; that is, a logical-OR-expression (C90
4439 6.3.5-6.3.14, C99 6.5.5-6.5.14). If AFTER is not NULL then it is
4440 an Objective-C message expression which is the primary-expression
4441 starting the expression as an initializer.
4443 multiplicative-expression:
4445 multiplicative-expression * cast-expression
4446 multiplicative-expression / cast-expression
4447 multiplicative-expression % cast-expression
4449 additive-expression:
4450 multiplicative-expression
4451 additive-expression + multiplicative-expression
4452 additive-expression - multiplicative-expression
4456 shift-expression << additive-expression
4457 shift-expression >> additive-expression
4459 relational-expression:
4461 relational-expression < shift-expression
4462 relational-expression > shift-expression
4463 relational-expression <= shift-expression
4464 relational-expression >= shift-expression
4466 equality-expression:
4467 relational-expression
4468 equality-expression == relational-expression
4469 equality-expression != relational-expression
4473 AND-expression & equality-expression
4475 exclusive-OR-expression:
4477 exclusive-OR-expression ^ AND-expression
4479 inclusive-OR-expression:
4480 exclusive-OR-expression
4481 inclusive-OR-expression | exclusive-OR-expression
4483 logical-AND-expression:
4484 inclusive-OR-expression
4485 logical-AND-expression && inclusive-OR-expression
4487 logical-OR-expression:
4488 logical-AND-expression
4489 logical-OR-expression || logical-AND-expression
4492 static struct c_expr
4493 c_parser_binary_expression (c_parser
*parser
, struct c_expr
*after
)
4495 /* A binary expression is parsed using operator-precedence parsing,
4496 with the operands being cast expressions. All the binary
4497 operators are left-associative. Thus a binary expression is of
4500 E0 op1 E1 op2 E2 ...
4502 which we represent on a stack. On the stack, the precedence
4503 levels are strictly increasing. When a new operator is
4504 encountered of higher precedence than that at the top of the
4505 stack, it is pushed; its LHS is the top expression, and its RHS
4506 is everything parsed until it is popped. When a new operator is
4507 encountered with precedence less than or equal to that at the top
4508 of the stack, triples E[i-1] op[i] E[i] are popped and replaced
4509 by the result of the operation until the operator at the top of
4510 the stack has lower precedence than the new operator or there is
4511 only one element on the stack; then the top expression is the LHS
4512 of the new operator. In the case of logical AND and OR
4513 expressions, we also need to adjust skip_evaluation as
4514 appropriate when the operators are pushed and popped. */
4516 /* The precedence levels, where 0 is a dummy lowest level used for
4517 the bottom of the stack. */
4533 /* The expression at this stack level. */
4535 /* The precedence of the operator on its left, PREC_NONE at the
4536 bottom of the stack. */
4538 /* The operation on its left. */
4544 switch (stack[sp].op) \
4546 case TRUTH_ANDIF_EXPR: \
4547 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_false_node; \
4549 case TRUTH_ORIF_EXPR: \
4550 skip_evaluation -= stack[sp - 1].expr.value == truthvalue_true_node; \
4555 stack[sp - 1].expr \
4556 = default_function_array_conversion (stack[sp - 1].expr); \
4558 = default_function_array_conversion (stack[sp].expr); \
4559 stack[sp - 1].expr = parser_build_binary_op (stack[sp].op, \
4560 stack[sp - 1].expr, \
4564 gcc_assert (!after
|| c_dialect_objc ());
4565 stack
[0].expr
= c_parser_cast_expression (parser
, after
);
4566 stack
[0].prec
= PREC_NONE
;
4571 enum tree_code ocode
;
4574 switch (c_parser_peek_token (parser
)->type
)
4582 ocode
= TRUNC_DIV_EXPR
;
4586 ocode
= TRUNC_MOD_EXPR
;
4598 ocode
= LSHIFT_EXPR
;
4602 ocode
= RSHIFT_EXPR
;
4616 case CPP_GREATER_EQ
:
4629 oprec
= PREC_BITAND
;
4630 ocode
= BIT_AND_EXPR
;
4633 oprec
= PREC_BITXOR
;
4634 ocode
= BIT_XOR_EXPR
;
4638 ocode
= BIT_IOR_EXPR
;
4641 oprec
= PREC_LOGAND
;
4642 ocode
= TRUTH_ANDIF_EXPR
;
4646 ocode
= TRUTH_ORIF_EXPR
;
4649 /* Not a binary operator, so end of the binary
4653 c_parser_consume_token (parser
);
4654 while (oprec
<= stack
[sp
].prec
)
4658 case TRUTH_ANDIF_EXPR
:
4660 = default_function_array_conversion (stack
[sp
].expr
);
4661 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4662 (default_conversion (stack
[sp
].expr
.value
));
4663 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_false_node
;
4665 case TRUTH_ORIF_EXPR
:
4667 = default_function_array_conversion (stack
[sp
].expr
);
4668 stack
[sp
].expr
.value
= c_objc_common_truthvalue_conversion
4669 (default_conversion (stack
[sp
].expr
.value
));
4670 skip_evaluation
+= stack
[sp
].expr
.value
== truthvalue_true_node
;
4676 stack
[sp
].expr
= c_parser_cast_expression (parser
, NULL
);
4677 stack
[sp
].prec
= oprec
;
4678 stack
[sp
].op
= ocode
;
4683 return stack
[0].expr
;
4687 /* Parse a cast expression (C90 6.3.4, C99 6.5.4). If AFTER is not
4688 NULL then it is an Objective-C message expression which is the
4689 primary-expression starting the expression as an initializer.
4693 ( type-name ) unary-expression
4696 static struct c_expr
4697 c_parser_cast_expression (c_parser
*parser
, struct c_expr
*after
)
4699 gcc_assert (!after
|| c_dialect_objc ());
4701 return c_parser_postfix_expression_after_primary (parser
, *after
);
4702 /* If the expression begins with a parenthesized type name, it may
4703 be either a cast or a compound literal; we need to see whether
4704 the next character is '{' to tell the difference. If not, it is
4705 an unary expression. */
4706 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4707 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4709 struct c_type_name
*type_name
;
4712 c_parser_consume_token (parser
);
4713 type_name
= c_parser_type_name (parser
);
4714 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4715 if (type_name
== NULL
)
4717 ret
.value
= error_mark_node
;
4718 ret
.original_code
= ERROR_MARK
;
4722 /* Save casted types in the function's used types hash table. */
4723 used_types_insert (type_name
->specs
->type
);
4725 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4726 return c_parser_postfix_expression_after_paren_type (parser
,
4728 expr
= c_parser_cast_expression (parser
, NULL
);
4729 expr
= default_function_array_conversion (expr
);
4730 ret
.value
= c_cast_expr (type_name
, expr
.value
);
4731 ret
.original_code
= ERROR_MARK
;
4735 return c_parser_unary_expression (parser
);
4738 /* Parse an unary expression (C90 6.3.3, C99 6.5.3).
4744 unary-operator cast-expression
4745 sizeof unary-expression
4746 sizeof ( type-name )
4748 unary-operator: one of
4754 __alignof__ unary-expression
4755 __alignof__ ( type-name )
4758 unary-operator: one of
4759 __extension__ __real__ __imag__
4761 In addition, the GNU syntax treats ++ and -- as unary operators, so
4762 they may be applied to cast expressions with errors for non-lvalues
4765 static struct c_expr
4766 c_parser_unary_expression (c_parser
*parser
)
4769 struct c_expr ret
, op
;
4770 switch (c_parser_peek_token (parser
)->type
)
4773 c_parser_consume_token (parser
);
4774 op
= c_parser_cast_expression (parser
, NULL
);
4775 op
= default_function_array_conversion (op
);
4776 return parser_build_unary_op (PREINCREMENT_EXPR
, op
);
4777 case CPP_MINUS_MINUS
:
4778 c_parser_consume_token (parser
);
4779 op
= c_parser_cast_expression (parser
, NULL
);
4780 op
= default_function_array_conversion (op
);
4781 return parser_build_unary_op (PREDECREMENT_EXPR
, op
);
4783 c_parser_consume_token (parser
);
4784 return parser_build_unary_op (ADDR_EXPR
,
4785 c_parser_cast_expression (parser
, NULL
));
4787 c_parser_consume_token (parser
);
4788 op
= c_parser_cast_expression (parser
, NULL
);
4789 op
= default_function_array_conversion (op
);
4790 ret
.value
= build_indirect_ref (op
.value
, "unary *");
4791 ret
.original_code
= ERROR_MARK
;
4794 c_parser_consume_token (parser
);
4795 if (!c_dialect_objc () && !in_system_header
)
4796 warning (OPT_Wtraditional
,
4797 "traditional C rejects the unary plus operator");
4798 op
= c_parser_cast_expression (parser
, NULL
);
4799 op
= default_function_array_conversion (op
);
4800 return parser_build_unary_op (CONVERT_EXPR
, op
);
4802 c_parser_consume_token (parser
);
4803 op
= c_parser_cast_expression (parser
, NULL
);
4804 op
= default_function_array_conversion (op
);
4805 return parser_build_unary_op (NEGATE_EXPR
, op
);
4807 c_parser_consume_token (parser
);
4808 op
= c_parser_cast_expression (parser
, NULL
);
4809 op
= default_function_array_conversion (op
);
4810 return parser_build_unary_op (BIT_NOT_EXPR
, op
);
4812 c_parser_consume_token (parser
);
4813 op
= c_parser_cast_expression (parser
, NULL
);
4814 op
= default_function_array_conversion (op
);
4815 return parser_build_unary_op (TRUTH_NOT_EXPR
, op
);
4817 /* Refer to the address of a label as a pointer. */
4818 c_parser_consume_token (parser
);
4819 if (c_parser_next_token_is (parser
, CPP_NAME
))
4821 ret
.value
= finish_label_address_expr
4822 (c_parser_peek_token (parser
)->value
);
4823 c_parser_consume_token (parser
);
4827 c_parser_error (parser
, "expected identifier");
4828 ret
.value
= error_mark_node
;
4830 ret
.original_code
= ERROR_MARK
;
4833 switch (c_parser_peek_token (parser
)->keyword
)
4836 return c_parser_sizeof_expression (parser
);
4838 return c_parser_alignof_expression (parser
);
4840 c_parser_consume_token (parser
);
4841 ext
= disable_extension_diagnostics ();
4842 ret
= c_parser_cast_expression (parser
, NULL
);
4843 restore_extension_diagnostics (ext
);
4846 c_parser_consume_token (parser
);
4847 op
= c_parser_cast_expression (parser
, NULL
);
4848 op
= default_function_array_conversion (op
);
4849 return parser_build_unary_op (REALPART_EXPR
, op
);
4851 c_parser_consume_token (parser
);
4852 op
= c_parser_cast_expression (parser
, NULL
);
4853 op
= default_function_array_conversion (op
);
4854 return parser_build_unary_op (IMAGPART_EXPR
, op
);
4856 return c_parser_postfix_expression (parser
);
4859 return c_parser_postfix_expression (parser
);
4863 /* Parse a sizeof expression. */
4865 static struct c_expr
4866 c_parser_sizeof_expression (c_parser
*parser
)
4869 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_SIZEOF
));
4870 c_parser_consume_token (parser
);
4873 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4874 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4876 /* Either sizeof ( type-name ) or sizeof unary-expression
4877 starting with a compound literal. */
4878 struct c_type_name
*type_name
;
4879 c_parser_consume_token (parser
);
4880 type_name
= c_parser_type_name (parser
);
4881 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4882 if (type_name
== NULL
)
4887 ret
.value
= error_mark_node
;
4888 ret
.original_code
= ERROR_MARK
;
4891 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4893 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4897 /* sizeof ( type-name ). */
4900 if (type_name
->declarator
->kind
== cdk_array
4901 && type_name
->declarator
->u
.array
.vla_unspec_p
)
4904 error ("%<[*]%> not allowed in other than a declaration");
4906 return c_expr_sizeof_type (type_name
);
4910 expr
= c_parser_unary_expression (parser
);
4914 if (TREE_CODE (expr
.value
) == COMPONENT_REF
4915 && DECL_C_BIT_FIELD (TREE_OPERAND (expr
.value
, 1)))
4916 error ("%<sizeof%> applied to a bit-field");
4917 return c_expr_sizeof_expr (expr
);
4921 /* Parse an alignof expression. */
4923 static struct c_expr
4924 c_parser_alignof_expression (c_parser
*parser
)
4927 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_ALIGNOF
));
4928 c_parser_consume_token (parser
);
4931 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
)
4932 && c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
4934 /* Either __alignof__ ( type-name ) or __alignof__
4935 unary-expression starting with a compound literal. */
4936 struct c_type_name
*type_name
;
4938 c_parser_consume_token (parser
);
4939 type_name
= c_parser_type_name (parser
);
4940 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
4941 if (type_name
== NULL
)
4946 ret
.value
= error_mark_node
;
4947 ret
.original_code
= ERROR_MARK
;
4950 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
4952 expr
= c_parser_postfix_expression_after_paren_type (parser
,
4956 /* alignof ( type-name ). */
4959 ret
.value
= c_alignof (groktypename (type_name
));
4960 ret
.original_code
= ERROR_MARK
;
4966 expr
= c_parser_unary_expression (parser
);
4970 ret
.value
= c_alignof_expr (expr
.value
);
4971 ret
.original_code
= ERROR_MARK
;
4976 /* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
4980 postfix-expression [ expression ]
4981 postfix-expression ( argument-expression-list[opt] )
4982 postfix-expression . identifier
4983 postfix-expression -> identifier
4984 postfix-expression ++
4985 postfix-expression --
4986 ( type-name ) { initializer-list }
4987 ( type-name ) { initializer-list , }
4989 argument-expression-list:
4991 argument-expression-list , argument-expression
5003 (treated as a keyword in GNU C)
5006 ( compound-statement )
5007 __builtin_va_arg ( assignment-expression , type-name )
5008 __builtin_offsetof ( type-name , offsetof-member-designator )
5009 __builtin_choose_expr ( assignment-expression ,
5010 assignment-expression ,
5011 assignment-expression )
5012 __builtin_types_compatible_p ( type-name , type-name )
5014 offsetof-member-designator:
5016 offsetof-member-designator . identifier
5017 offsetof-member-designator [ expression ]
5022 [ objc-receiver objc-message-args ]
5023 @selector ( objc-selector-arg )
5024 @protocol ( identifier )
5025 @encode ( type-name )
5029 static struct c_expr
5030 c_parser_postfix_expression (c_parser
*parser
)
5032 struct c_expr expr
, e1
, e2
, e3
;
5033 struct c_type_name
*t1
, *t2
;
5034 switch (c_parser_peek_token (parser
)->type
)
5039 expr
.value
= c_parser_peek_token (parser
)->value
;
5040 expr
.original_code
= ERROR_MARK
;
5041 c_parser_consume_token (parser
);
5045 expr
.value
= c_parser_peek_token (parser
)->value
;
5046 expr
.original_code
= STRING_CST
;
5047 c_parser_consume_token (parser
);
5049 case CPP_OBJC_STRING
:
5050 gcc_assert (c_dialect_objc ());
5052 = objc_build_string_object (c_parser_peek_token (parser
)->value
);
5053 expr
.original_code
= ERROR_MARK
;
5054 c_parser_consume_token (parser
);
5057 if (c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
5059 c_parser_error (parser
, "expected expression");
5060 expr
.value
= error_mark_node
;
5061 expr
.original_code
= ERROR_MARK
;
5065 tree id
= c_parser_peek_token (parser
)->value
;
5066 location_t loc
= c_parser_peek_token (parser
)->location
;
5067 c_parser_consume_token (parser
);
5068 expr
.value
= build_external_ref (id
,
5069 (c_parser_peek_token (parser
)->type
5070 == CPP_OPEN_PAREN
), loc
);
5071 expr
.original_code
= ERROR_MARK
;
5074 case CPP_OPEN_PAREN
:
5075 /* A parenthesized expression, statement expression or compound
5077 if (c_parser_peek_2nd_token (parser
)->type
== CPP_OPEN_BRACE
)
5079 /* A statement expression. */
5081 c_parser_consume_token (parser
);
5082 c_parser_consume_token (parser
);
5083 if (cur_stmt_list
== NULL
)
5085 error ("braced-group within expression allowed "
5086 "only inside a function");
5087 parser
->error
= true;
5088 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
, NULL
);
5089 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5090 expr
.value
= error_mark_node
;
5091 expr
.original_code
= ERROR_MARK
;
5094 stmt
= c_begin_stmt_expr ();
5095 c_parser_compound_statement_nostart (parser
);
5096 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5099 pedwarn ("ISO C forbids braced-groups within expressions");
5100 expr
.value
= c_finish_stmt_expr (stmt
);
5101 expr
.original_code
= ERROR_MARK
;
5103 else if (c_token_starts_typename (c_parser_peek_2nd_token (parser
)))
5105 /* A compound literal. ??? Can we actually get here rather
5106 than going directly to
5107 c_parser_postfix_expression_after_paren_type from
5109 struct c_type_name
*type_name
;
5110 c_parser_consume_token (parser
);
5111 type_name
= c_parser_type_name (parser
);
5112 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5114 if (type_name
== NULL
)
5116 expr
.value
= error_mark_node
;
5117 expr
.original_code
= ERROR_MARK
;
5120 expr
= c_parser_postfix_expression_after_paren_type (parser
,
5125 /* A parenthesized expression. */
5126 c_parser_consume_token (parser
);
5127 expr
= c_parser_expression (parser
);
5128 if (TREE_CODE (expr
.value
) == MODIFY_EXPR
)
5129 TREE_NO_WARNING (expr
.value
) = 1;
5130 expr
.original_code
= ERROR_MARK
;
5131 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5136 switch (c_parser_peek_token (parser
)->keyword
)
5138 case RID_FUNCTION_NAME
:
5139 case RID_PRETTY_FUNCTION_NAME
:
5140 case RID_C99_FUNCTION_NAME
:
5141 expr
.value
= fname_decl (c_parser_peek_token (parser
)->keyword
,
5142 c_parser_peek_token (parser
)->value
);
5143 expr
.original_code
= ERROR_MARK
;
5144 c_parser_consume_token (parser
);
5147 c_parser_consume_token (parser
);
5148 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5150 expr
.value
= error_mark_node
;
5151 expr
.original_code
= ERROR_MARK
;
5154 e1
= c_parser_expr_no_commas (parser
, NULL
);
5155 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5157 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5158 expr
.value
= error_mark_node
;
5159 expr
.original_code
= ERROR_MARK
;
5162 t1
= c_parser_type_name (parser
);
5163 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5167 expr
.value
= error_mark_node
;
5168 expr
.original_code
= ERROR_MARK
;
5172 expr
.value
= build_va_arg (e1
.value
, groktypename (t1
));
5173 expr
.original_code
= ERROR_MARK
;
5177 c_parser_consume_token (parser
);
5178 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5180 expr
.value
= error_mark_node
;
5181 expr
.original_code
= ERROR_MARK
;
5184 t1
= c_parser_type_name (parser
);
5187 expr
.value
= error_mark_node
;
5188 expr
.original_code
= ERROR_MARK
;
5191 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5193 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5194 expr
.value
= error_mark_node
;
5195 expr
.original_code
= ERROR_MARK
;
5199 tree type
= groktypename (t1
);
5201 if (type
== error_mark_node
)
5202 offsetof_ref
= error_mark_node
;
5204 offsetof_ref
= build1 (INDIRECT_REF
, type
, NULL
);
5205 /* Parse the second argument to __builtin_offsetof. We
5206 must have one identifier, and beyond that we want to
5207 accept sub structure and sub array references. */
5208 if (c_parser_next_token_is (parser
, CPP_NAME
))
5210 offsetof_ref
= build_component_ref
5211 (offsetof_ref
, c_parser_peek_token (parser
)->value
);
5212 c_parser_consume_token (parser
);
5213 while (c_parser_next_token_is (parser
, CPP_DOT
)
5214 || c_parser_next_token_is (parser
,
5217 if (c_parser_next_token_is (parser
, CPP_DOT
))
5219 c_parser_consume_token (parser
);
5220 if (c_parser_next_token_is_not (parser
,
5223 c_parser_error (parser
, "expected identifier");
5226 offsetof_ref
= build_component_ref
5228 c_parser_peek_token (parser
)->value
);
5229 c_parser_consume_token (parser
);
5234 c_parser_consume_token (parser
);
5235 idx
= c_parser_expression (parser
).value
;
5236 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5238 offsetof_ref
= build_array_ref (offsetof_ref
, idx
);
5243 c_parser_error (parser
, "expected identifier");
5244 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5246 expr
.value
= fold_offsetof (offsetof_ref
);
5247 expr
.original_code
= ERROR_MARK
;
5250 case RID_CHOOSE_EXPR
:
5251 c_parser_consume_token (parser
);
5252 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5254 expr
.value
= error_mark_node
;
5255 expr
.original_code
= ERROR_MARK
;
5258 e1
= c_parser_expr_no_commas (parser
, NULL
);
5259 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5261 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5262 expr
.value
= error_mark_node
;
5263 expr
.original_code
= ERROR_MARK
;
5266 e2
= c_parser_expr_no_commas (parser
, NULL
);
5267 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5269 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5270 expr
.value
= error_mark_node
;
5271 expr
.original_code
= ERROR_MARK
;
5274 e3
= c_parser_expr_no_commas (parser
, NULL
);
5275 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5280 c
= fold (e1
.value
);
5281 if (TREE_CODE (c
) != INTEGER_CST
)
5282 error ("first argument to %<__builtin_choose_expr%> not"
5284 expr
= integer_zerop (c
) ? e3
: e2
;
5287 case RID_TYPES_COMPATIBLE_P
:
5288 c_parser_consume_token (parser
);
5289 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5291 expr
.value
= error_mark_node
;
5292 expr
.original_code
= ERROR_MARK
;
5295 t1
= c_parser_type_name (parser
);
5298 expr
.value
= error_mark_node
;
5299 expr
.original_code
= ERROR_MARK
;
5302 if (!c_parser_require (parser
, CPP_COMMA
, "expected %<,%>"))
5304 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5305 expr
.value
= error_mark_node
;
5306 expr
.original_code
= ERROR_MARK
;
5309 t2
= c_parser_type_name (parser
);
5312 expr
.value
= error_mark_node
;
5313 expr
.original_code
= ERROR_MARK
;
5316 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5321 e1
= TYPE_MAIN_VARIANT (groktypename (t1
));
5322 e2
= TYPE_MAIN_VARIANT (groktypename (t2
));
5324 expr
.value
= comptypes (e1
, e2
)
5325 ? build_int_cst (NULL_TREE
, 1)
5326 : build_int_cst (NULL_TREE
, 0);
5327 expr
.original_code
= ERROR_MARK
;
5330 case RID_AT_SELECTOR
:
5331 gcc_assert (c_dialect_objc ());
5332 c_parser_consume_token (parser
);
5333 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5335 expr
.value
= error_mark_node
;
5336 expr
.original_code
= ERROR_MARK
;
5340 tree sel
= c_parser_objc_selector_arg (parser
);
5341 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5343 expr
.value
= objc_build_selector_expr (sel
);
5344 expr
.original_code
= ERROR_MARK
;
5347 case RID_AT_PROTOCOL
:
5348 gcc_assert (c_dialect_objc ());
5349 c_parser_consume_token (parser
);
5350 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5352 expr
.value
= error_mark_node
;
5353 expr
.original_code
= ERROR_MARK
;
5356 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5358 c_parser_error (parser
, "expected identifier");
5359 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5360 expr
.value
= error_mark_node
;
5361 expr
.original_code
= ERROR_MARK
;
5365 tree id
= c_parser_peek_token (parser
)->value
;
5366 c_parser_consume_token (parser
);
5367 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5369 expr
.value
= objc_build_protocol_expr (id
);
5370 expr
.original_code
= ERROR_MARK
;
5374 /* Extension to support C-structures in the archiver. */
5375 gcc_assert (c_dialect_objc ());
5376 c_parser_consume_token (parser
);
5377 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
5379 expr
.value
= error_mark_node
;
5380 expr
.original_code
= ERROR_MARK
;
5383 t1
= c_parser_type_name (parser
);
5386 expr
.value
= error_mark_node
;
5387 expr
.original_code
= ERROR_MARK
;
5388 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5391 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5394 tree type
= groktypename (t1
);
5395 expr
.value
= objc_build_encode_expr (type
);
5396 expr
.original_code
= ERROR_MARK
;
5400 c_parser_error (parser
, "expected expression");
5401 expr
.value
= error_mark_node
;
5402 expr
.original_code
= ERROR_MARK
;
5406 case CPP_OPEN_SQUARE
:
5407 if (c_dialect_objc ())
5409 tree receiver
, args
;
5410 c_parser_consume_token (parser
);
5411 receiver
= c_parser_objc_receiver (parser
);
5412 args
= c_parser_objc_message_args (parser
);
5413 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5415 expr
.value
= objc_build_message_expr (build_tree_list (receiver
,
5417 expr
.original_code
= ERROR_MARK
;
5420 /* Else fall through to report error. */
5422 c_parser_error (parser
, "expected expression");
5423 expr
.value
= error_mark_node
;
5424 expr
.original_code
= ERROR_MARK
;
5427 return c_parser_postfix_expression_after_primary (parser
, expr
);
5430 /* Parse a postfix expression after a parenthesized type name: the
5431 brace-enclosed initializer of a compound literal, possibly followed
5432 by some postfix operators. This is separate because it is not
5433 possible to tell until after the type name whether a cast
5434 expression has a cast or a compound literal, or whether the operand
5435 of sizeof is a parenthesized type name or starts with a compound
5438 static struct c_expr
5439 c_parser_postfix_expression_after_paren_type (c_parser
*parser
,
5440 struct c_type_name
*type_name
)
5445 start_init (NULL_TREE
, NULL
, 0);
5446 type
= groktypename (type_name
);
5447 if (C_TYPE_VARIABLE_SIZE (type
))
5449 error ("compound literal has variable size");
5450 type
= error_mark_node
;
5452 init
= c_parser_braced_init (parser
, type
, false);
5454 maybe_warn_string_init (type
, init
);
5456 if (pedantic
&& !flag_isoc99
)
5457 pedwarn ("ISO C90 forbids compound literals");
5458 expr
.value
= build_compound_literal (type
, init
.value
);
5459 expr
.original_code
= ERROR_MARK
;
5460 return c_parser_postfix_expression_after_primary (parser
, expr
);
5463 /* Parse a postfix expression after the initial primary or compound
5464 literal; that is, parse a series of postfix operators. */
5466 static struct c_expr
5467 c_parser_postfix_expression_after_primary (c_parser
*parser
,
5470 tree ident
, idx
, exprlist
;
5473 switch (c_parser_peek_token (parser
)->type
)
5475 case CPP_OPEN_SQUARE
:
5476 /* Array reference. */
5477 c_parser_consume_token (parser
);
5478 idx
= c_parser_expression (parser
).value
;
5479 c_parser_skip_until_found (parser
, CPP_CLOSE_SQUARE
,
5481 expr
.value
= build_array_ref (expr
.value
, idx
);
5482 expr
.original_code
= ERROR_MARK
;
5484 case CPP_OPEN_PAREN
:
5485 /* Function call. */
5486 c_parser_consume_token (parser
);
5487 if (c_parser_next_token_is (parser
, CPP_CLOSE_PAREN
))
5488 exprlist
= NULL_TREE
;
5490 exprlist
= c_parser_expr_list (parser
, true);
5491 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
5493 expr
.value
= build_function_call (expr
.value
, exprlist
);
5494 expr
.original_code
= ERROR_MARK
;
5497 /* Structure element reference. */
5498 c_parser_consume_token (parser
);
5499 expr
= default_function_array_conversion (expr
);
5500 if (c_parser_next_token_is (parser
, CPP_NAME
))
5501 ident
= c_parser_peek_token (parser
)->value
;
5504 c_parser_error (parser
, "expected identifier");
5505 expr
.value
= error_mark_node
;
5506 expr
.original_code
= ERROR_MARK
;
5509 c_parser_consume_token (parser
);
5510 expr
.value
= build_component_ref (expr
.value
, ident
);
5511 expr
.original_code
= ERROR_MARK
;
5514 /* Structure element reference. */
5515 c_parser_consume_token (parser
);
5516 expr
= default_function_array_conversion (expr
);
5517 if (c_parser_next_token_is (parser
, CPP_NAME
))
5518 ident
= c_parser_peek_token (parser
)->value
;
5521 c_parser_error (parser
, "expected identifier");
5522 expr
.value
= error_mark_node
;
5523 expr
.original_code
= ERROR_MARK
;
5526 c_parser_consume_token (parser
);
5527 expr
.value
= build_component_ref (build_indirect_ref (expr
.value
,
5529 expr
.original_code
= ERROR_MARK
;
5532 /* Postincrement. */
5533 c_parser_consume_token (parser
);
5534 expr
= default_function_array_conversion (expr
);
5535 expr
.value
= build_unary_op (POSTINCREMENT_EXPR
, expr
.value
, 0);
5536 expr
.original_code
= ERROR_MARK
;
5538 case CPP_MINUS_MINUS
:
5539 /* Postdecrement. */
5540 c_parser_consume_token (parser
);
5541 expr
= default_function_array_conversion (expr
);
5542 expr
.value
= build_unary_op (POSTDECREMENT_EXPR
, expr
.value
, 0);
5543 expr
.original_code
= ERROR_MARK
;
5551 /* Parse an expression (C90 6.3.17, C99 6.5.17).
5554 assignment-expression
5555 expression , assignment-expression
5558 static struct c_expr
5559 c_parser_expression (c_parser
*parser
)
5562 expr
= c_parser_expr_no_commas (parser
, NULL
);
5563 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5566 c_parser_consume_token (parser
);
5567 next
= c_parser_expr_no_commas (parser
, NULL
);
5568 next
= default_function_array_conversion (next
);
5569 expr
.value
= build_compound_expr (expr
.value
, next
.value
);
5570 expr
.original_code
= COMPOUND_EXPR
;
5575 /* Parse an expression and convert functions or arrays to
5578 static struct c_expr
5579 c_parser_expression_conv (c_parser
*parser
)
5582 expr
= c_parser_expression (parser
);
5583 expr
= default_function_array_conversion (expr
);
5587 /* Parse a non-empty list of expressions. If CONVERT_P, convert
5588 functions and arrays to pointers.
5591 assignment-expression
5592 nonempty-expr-list , assignment-expression
5596 c_parser_expr_list (c_parser
*parser
, bool convert_p
)
5600 expr
= c_parser_expr_no_commas (parser
, NULL
);
5602 expr
= default_function_array_conversion (expr
);
5603 ret
= cur
= build_tree_list (NULL_TREE
, expr
.value
);
5604 while (c_parser_next_token_is (parser
, CPP_COMMA
))
5606 c_parser_consume_token (parser
);
5607 expr
= c_parser_expr_no_commas (parser
, NULL
);
5609 expr
= default_function_array_conversion (expr
);
5610 cur
= TREE_CHAIN (cur
) = build_tree_list (NULL_TREE
, expr
.value
);
5616 /* Parse Objective-C-specific constructs. */
5618 /* Parse an objc-class-definition.
5620 objc-class-definition:
5621 @interface identifier objc-superclass[opt] objc-protocol-refs[opt]
5622 objc-class-instance-variables[opt] objc-methodprotolist @end
5623 @implementation identifier objc-superclass[opt]
5624 objc-class-instance-variables[opt]
5625 @interface identifier ( identifier ) objc-protocol-refs[opt]
5626 objc-methodprotolist @end
5627 @implementation identifier ( identifier )
5632 "@interface identifier (" must start "@interface identifier (
5633 identifier ) ...": objc-methodprotolist in the first production may
5634 not start with a parenthesized identifier as a declarator of a data
5635 definition with no declaration specifiers if the objc-superclass,
5636 objc-protocol-refs and objc-class-instance-variables are omitted. */
5639 c_parser_objc_class_definition (c_parser
*parser
)
5644 if (c_parser_next_token_is_keyword (parser
, RID_AT_INTERFACE
))
5646 else if (c_parser_next_token_is_keyword (parser
, RID_AT_IMPLEMENTATION
))
5650 c_parser_consume_token (parser
);
5651 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5653 c_parser_error (parser
, "expected identifier");
5656 id1
= c_parser_peek_token (parser
)->value
;
5657 c_parser_consume_token (parser
);
5658 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
5661 tree proto
= NULL_TREE
;
5662 c_parser_consume_token (parser
);
5663 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5665 c_parser_error (parser
, "expected identifier");
5666 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
5669 id2
= c_parser_peek_token (parser
)->value
;
5670 c_parser_consume_token (parser
);
5671 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
5674 objc_start_category_implementation (id1
, id2
);
5677 if (c_parser_next_token_is (parser
, CPP_LESS
))
5678 proto
= c_parser_objc_protocol_refs (parser
);
5679 objc_start_category_interface (id1
, id2
, proto
);
5680 c_parser_objc_methodprotolist (parser
);
5681 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5682 objc_finish_interface ();
5685 if (c_parser_next_token_is (parser
, CPP_COLON
))
5687 c_parser_consume_token (parser
);
5688 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5690 c_parser_error (parser
, "expected identifier");
5693 superclass
= c_parser_peek_token (parser
)->value
;
5694 c_parser_consume_token (parser
);
5697 superclass
= NULL_TREE
;
5700 tree proto
= NULL_TREE
;
5701 if (c_parser_next_token_is (parser
, CPP_LESS
))
5702 proto
= c_parser_objc_protocol_refs (parser
);
5703 objc_start_class_interface (id1
, superclass
, proto
);
5706 objc_start_class_implementation (id1
, superclass
);
5707 if (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5708 c_parser_objc_class_instance_variables (parser
);
5711 objc_continue_interface ();
5712 c_parser_objc_methodprotolist (parser
);
5713 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5714 objc_finish_interface ();
5718 objc_continue_implementation ();
5723 /* Parse objc-class-instance-variables.
5725 objc-class-instance-variables:
5726 { objc-instance-variable-decl-list[opt] }
5728 objc-instance-variable-decl-list:
5729 objc-visibility-spec
5730 objc-instance-variable-decl ;
5732 objc-instance-variable-decl-list objc-visibility-spec
5733 objc-instance-variable-decl-list objc-instance-variable-decl ;
5734 objc-instance-variable-decl-list ;
5736 objc-visibility-spec:
5741 objc-instance-variable-decl:
5746 c_parser_objc_class_instance_variables (c_parser
*parser
)
5748 gcc_assert (c_parser_next_token_is (parser
, CPP_OPEN_BRACE
));
5749 c_parser_consume_token (parser
);
5750 while (c_parser_next_token_is_not (parser
, CPP_EOF
))
5753 /* Parse any stray semicolon. */
5754 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5757 pedwarn ("extra semicolon in struct or union specified");
5758 c_parser_consume_token (parser
);
5761 /* Stop if at the end of the instance variables. */
5762 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
5764 c_parser_consume_token (parser
);
5767 /* Parse any objc-visibility-spec. */
5768 if (c_parser_next_token_is_keyword (parser
, RID_AT_PRIVATE
))
5770 c_parser_consume_token (parser
);
5771 objc_set_visibility (2);
5774 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PROTECTED
))
5776 c_parser_consume_token (parser
);
5777 objc_set_visibility (0);
5780 else if (c_parser_next_token_is_keyword (parser
, RID_AT_PUBLIC
))
5782 c_parser_consume_token (parser
);
5783 objc_set_visibility (1);
5786 else if (c_parser_next_token_is (parser
, CPP_PRAGMA
))
5788 c_parser_pragma (parser
, pragma_external
);
5792 /* Parse some comma-separated declarations. */
5793 decls
= c_parser_struct_declaration (parser
);
5795 /* Comma-separated instance variables are chained together in
5796 reverse order; add them one by one. */
5797 tree ivar
= nreverse (decls
);
5798 for (; ivar
; ivar
= TREE_CHAIN (ivar
))
5799 objc_add_instance_variable (copy_node (ivar
));
5801 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5805 /* Parse an objc-class-declaration.
5807 objc-class-declaration:
5808 @class identifier-list ;
5812 c_parser_objc_class_declaration (c_parser
*parser
)
5814 tree list
= NULL_TREE
;
5815 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_CLASS
));
5816 c_parser_consume_token (parser
);
5817 /* Any identifiers, including those declared as type names, are OK
5822 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5824 c_parser_error (parser
, "expected identifier");
5827 id
= c_parser_peek_token (parser
)->value
;
5828 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5829 c_parser_consume_token (parser
);
5830 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5831 c_parser_consume_token (parser
);
5835 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5836 objc_declare_class (list
);
5839 /* Parse an objc-alias-declaration.
5841 objc-alias-declaration:
5842 @compatibility_alias identifier identifier ;
5846 c_parser_objc_alias_declaration (c_parser
*parser
)
5849 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_ALIAS
));
5850 c_parser_consume_token (parser
);
5851 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5853 c_parser_error (parser
, "expected identifier");
5854 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5857 id1
= c_parser_peek_token (parser
)->value
;
5858 c_parser_consume_token (parser
);
5859 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5861 c_parser_error (parser
, "expected identifier");
5862 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, NULL
);
5865 id2
= c_parser_peek_token (parser
)->value
;
5866 c_parser_consume_token (parser
);
5867 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5868 objc_declare_alias (id1
, id2
);
5871 /* Parse an objc-protocol-definition.
5873 objc-protocol-definition:
5874 @protocol identifier objc-protocol-refs[opt] objc-methodprotolist @end
5875 @protocol identifier-list ;
5877 "@protocol identifier ;" should be resolved as "@protocol
5878 identifier-list ;": objc-methodprotolist may not start with a
5879 semicolon in the first alternative if objc-protocol-refs are
5883 c_parser_objc_protocol_definition (c_parser
*parser
)
5885 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_PROTOCOL
));
5886 c_parser_consume_token (parser
);
5887 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5889 c_parser_error (parser
, "expected identifier");
5892 if (c_parser_peek_2nd_token (parser
)->type
== CPP_COMMA
5893 || c_parser_peek_2nd_token (parser
)->type
== CPP_SEMICOLON
)
5895 tree list
= NULL_TREE
;
5896 /* Any identifiers, including those declared as type names, are
5901 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
5903 c_parser_error (parser
, "expected identifier");
5906 id
= c_parser_peek_token (parser
)->value
;
5907 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
5908 c_parser_consume_token (parser
);
5909 if (c_parser_next_token_is (parser
, CPP_COMMA
))
5910 c_parser_consume_token (parser
);
5914 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
5915 objc_declare_protocols (list
);
5919 tree id
= c_parser_peek_token (parser
)->value
;
5920 tree proto
= NULL_TREE
;
5921 c_parser_consume_token (parser
);
5922 if (c_parser_next_token_is (parser
, CPP_LESS
))
5923 proto
= c_parser_objc_protocol_refs (parser
);
5924 objc_pq_context
= 1;
5925 objc_start_protocol (id
, proto
);
5926 c_parser_objc_methodprotolist (parser
);
5927 c_parser_require_keyword (parser
, RID_AT_END
, "expected %<@end%>");
5928 objc_pq_context
= 0;
5929 objc_finish_interface ();
5933 /* Parse an objc-method-type.
5940 static enum tree_code
5941 c_parser_objc_method_type (c_parser
*parser
)
5943 switch (c_parser_peek_token (parser
)->type
)
5946 c_parser_consume_token (parser
);
5949 c_parser_consume_token (parser
);
5956 /* Parse an objc-method-definition.
5958 objc-method-definition:
5959 objc-method-type objc-method-decl ;[opt] compound-statement
5963 c_parser_objc_method_definition (c_parser
*parser
)
5965 enum tree_code type
= c_parser_objc_method_type (parser
);
5967 objc_set_method_type (type
);
5968 objc_pq_context
= 1;
5969 decl
= c_parser_objc_method_decl (parser
);
5970 if (c_parser_next_token_is (parser
, CPP_SEMICOLON
))
5972 c_parser_consume_token (parser
);
5974 pedwarn ("extra semicolon in method definition specified");
5976 if (!c_parser_next_token_is (parser
, CPP_OPEN_BRACE
))
5978 c_parser_error (parser
, "expected %<{%>");
5981 objc_pq_context
= 0;
5982 objc_start_method_definition (decl
);
5983 add_stmt (c_parser_compound_statement (parser
));
5984 objc_finish_method_definition (current_function_decl
);
5987 /* Parse an objc-methodprotolist.
5989 objc-methodprotolist:
5991 objc-methodprotolist objc-methodproto
5992 objc-methodprotolist declaration
5993 objc-methodprotolist ;
5995 The declaration is a data definition, which may be missing
5996 declaration specifiers under the same rules and diagnostics as
5997 other data definitions outside functions, and the stray semicolon
5998 is diagnosed the same way as a stray semicolon outside a
6002 c_parser_objc_methodprotolist (c_parser
*parser
)
6006 /* The list is terminated by @end. */
6007 switch (c_parser_peek_token (parser
)->type
)
6011 pedwarn ("ISO C does not allow extra %<;%> outside of a function");
6012 c_parser_consume_token (parser
);
6016 c_parser_objc_methodproto (parser
);
6019 c_parser_pragma (parser
, pragma_external
);
6024 if (c_parser_next_token_is_keyword (parser
, RID_AT_END
))
6026 c_parser_declaration_or_fndef (parser
, false, true, false, true);
6032 /* Parse an objc-methodproto.
6035 objc-method-type objc-method-decl ;
6039 c_parser_objc_methodproto (c_parser
*parser
)
6041 enum tree_code type
= c_parser_objc_method_type (parser
);
6043 objc_set_method_type (type
);
6044 /* Remember protocol qualifiers in prototypes. */
6045 objc_pq_context
= 1;
6046 decl
= c_parser_objc_method_decl (parser
);
6047 /* Forget protocol qualifiers here. */
6048 objc_pq_context
= 0;
6049 objc_add_method_declaration (decl
);
6050 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
6053 /* Parse an objc-method-decl.
6056 ( objc-type-name ) objc-selector
6058 ( objc-type-name ) objc-keyword-selector objc-optparmlist
6059 objc-keyword-selector objc-optparmlist
6061 objc-keyword-selector:
6063 objc-keyword-selector objc-keyword-decl
6066 objc-selector : ( objc-type-name ) identifier
6067 objc-selector : identifier
6068 : ( objc-type-name ) identifier
6072 objc-optparms objc-optellipsis
6076 objc-opt-parms , parameter-declaration
6084 c_parser_objc_method_decl (c_parser
*parser
)
6086 tree type
= NULL_TREE
;
6088 tree parms
= NULL_TREE
;
6089 bool ellipsis
= false;
6091 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6093 c_parser_consume_token (parser
);
6094 type
= c_parser_objc_type_name (parser
);
6095 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6097 sel
= c_parser_objc_selector (parser
);
6098 /* If there is no selector, or a colon follows, we have an
6099 objc-keyword-selector. If there is a selector, and a colon does
6100 not follow, that selector ends the objc-method-decl. */
6101 if (!sel
|| c_parser_next_token_is (parser
, CPP_COLON
))
6104 tree list
= NULL_TREE
;
6107 tree atype
= NULL_TREE
, id
, keyworddecl
;
6108 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6110 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6112 c_parser_consume_token (parser
);
6113 atype
= c_parser_objc_type_name (parser
);
6114 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
6117 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6119 c_parser_error (parser
, "expected identifier");
6120 return error_mark_node
;
6122 id
= c_parser_peek_token (parser
)->value
;
6123 c_parser_consume_token (parser
);
6124 keyworddecl
= objc_build_keyword_decl (tsel
, atype
, id
);
6125 list
= chainon (list
, keyworddecl
);
6126 tsel
= c_parser_objc_selector (parser
);
6127 if (!tsel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6130 /* Parse the optional parameter list. Optional Objective-C
6131 method parameters follow the C syntax, and may include '...'
6132 to denote a variable number of arguments. */
6133 parms
= make_node (TREE_LIST
);
6134 while (c_parser_next_token_is (parser
, CPP_COMMA
))
6136 struct c_parm
*parm
;
6137 c_parser_consume_token (parser
);
6138 if (c_parser_next_token_is (parser
, CPP_ELLIPSIS
))
6141 c_parser_consume_token (parser
);
6144 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6147 parms
= chainon (parms
,
6148 build_tree_list (NULL_TREE
, grokparm (parm
)));
6152 return objc_build_method_signature (type
, sel
, parms
, ellipsis
);
6155 /* Parse an objc-type-name.
6158 objc-type-qualifiers[opt] type-name
6159 objc-type-qualifiers[opt]
6161 objc-type-qualifiers:
6163 objc-type-qualifiers objc-type-qualifier
6165 objc-type-qualifier: one of
6166 in out inout bycopy byref oneway
6170 c_parser_objc_type_name (c_parser
*parser
)
6172 tree quals
= NULL_TREE
;
6173 struct c_type_name
*typename
= NULL
;
6174 tree type
= NULL_TREE
;
6177 c_token
*token
= c_parser_peek_token (parser
);
6178 if (token
->type
== CPP_KEYWORD
6179 && (token
->keyword
== RID_IN
6180 || token
->keyword
== RID_OUT
6181 || token
->keyword
== RID_INOUT
6182 || token
->keyword
== RID_BYCOPY
6183 || token
->keyword
== RID_BYREF
6184 || token
->keyword
== RID_ONEWAY
))
6186 quals
= chainon (quals
, build_tree_list (NULL_TREE
, token
->value
));
6187 c_parser_consume_token (parser
);
6192 if (c_parser_next_token_starts_typename (parser
))
6193 typename
= c_parser_type_name (parser
);
6195 type
= groktypename (typename
);
6196 return build_tree_list (quals
, type
);
6199 /* Parse objc-protocol-refs.
6206 c_parser_objc_protocol_refs (c_parser
*parser
)
6208 tree list
= NULL_TREE
;
6209 gcc_assert (c_parser_next_token_is (parser
, CPP_LESS
));
6210 c_parser_consume_token (parser
);
6211 /* Any identifiers, including those declared as type names, are OK
6216 if (c_parser_next_token_is_not (parser
, CPP_NAME
))
6218 c_parser_error (parser
, "expected identifier");
6221 id
= c_parser_peek_token (parser
)->value
;
6222 list
= chainon (list
, build_tree_list (NULL_TREE
, id
));
6223 c_parser_consume_token (parser
);
6224 if (c_parser_next_token_is (parser
, CPP_COMMA
))
6225 c_parser_consume_token (parser
);
6229 c_parser_require (parser
, CPP_GREATER
, "expected %<>%>");
6233 /* Parse an objc-try-catch-statement.
6235 objc-try-catch-statement:
6236 @try compound-statement objc-catch-list[opt]
6237 @try compound-statement objc-catch-list[opt] @finally compound-statement
6240 @catch ( parameter-declaration ) compound-statement
6241 objc-catch-list @catch ( parameter-declaration ) compound-statement
6245 c_parser_objc_try_catch_statement (c_parser
*parser
)
6249 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_TRY
));
6250 c_parser_consume_token (parser
);
6251 loc
= c_parser_peek_token (parser
)->location
;
6252 stmt
= c_parser_compound_statement (parser
);
6253 objc_begin_try_stmt (loc
, stmt
);
6254 while (c_parser_next_token_is_keyword (parser
, RID_AT_CATCH
))
6256 struct c_parm
*parm
;
6257 c_parser_consume_token (parser
);
6258 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6260 parm
= c_parser_parameter_declaration (parser
, NULL_TREE
);
6263 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, NULL
);
6266 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6267 objc_begin_catch_clause (grokparm (parm
));
6268 if (c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
6269 c_parser_compound_statement_nostart (parser
);
6270 objc_finish_catch_clause ();
6272 if (c_parser_next_token_is_keyword (parser
, RID_AT_FINALLY
))
6276 c_parser_consume_token (parser
);
6277 finloc
= c_parser_peek_token (parser
)->location
;
6278 finstmt
= c_parser_compound_statement (parser
);
6279 objc_build_finally_clause (finloc
, finstmt
);
6281 objc_finish_try_stmt ();
6284 /* Parse an objc-synchronized-statement.
6286 objc-synchronized-statement:
6287 @synchronized ( expression ) compound-statement
6291 c_parser_objc_synchronized_statement (c_parser
*parser
)
6295 gcc_assert (c_parser_next_token_is_keyword (parser
, RID_AT_SYNCHRONIZED
));
6296 c_parser_consume_token (parser
);
6297 loc
= c_parser_peek_token (parser
)->location
;
6298 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6300 expr
= c_parser_expression (parser
).value
;
6301 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6304 expr
= error_mark_node
;
6305 stmt
= c_parser_compound_statement (parser
);
6306 objc_build_synchronized (loc
, expr
, stmt
);
6309 /* Parse an objc-selector; return NULL_TREE without an error if the
6310 next token is not an objc-selector.
6315 enum struct union if else while do for switch case default
6316 break continue return goto asm sizeof typeof __alignof
6317 unsigned long const short volatile signed restrict _Complex
6318 in out inout bycopy byref oneway int char float double void _Bool
6320 ??? Why this selection of keywords but not, for example, storage
6321 class specifiers? */
6324 c_parser_objc_selector (c_parser
*parser
)
6326 c_token
*token
= c_parser_peek_token (parser
);
6327 tree value
= token
->value
;
6328 if (token
->type
== CPP_NAME
)
6330 c_parser_consume_token (parser
);
6333 if (token
->type
!= CPP_KEYWORD
)
6335 switch (token
->keyword
)
6376 c_parser_consume_token (parser
);
6383 /* Parse an objc-selector-arg.
6387 objc-keywordname-list
6389 objc-keywordname-list:
6391 objc-keywordname-list objc-keywordname
6399 c_parser_objc_selector_arg (c_parser
*parser
)
6401 tree sel
= c_parser_objc_selector (parser
);
6402 tree list
= NULL_TREE
;
6403 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6407 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6409 list
= chainon (list
, build_tree_list (sel
, NULL_TREE
));
6410 sel
= c_parser_objc_selector (parser
);
6411 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6417 /* Parse an objc-receiver.
6426 c_parser_objc_receiver (c_parser
*parser
)
6428 if (c_parser_peek_token (parser
)->type
== CPP_NAME
6429 && (c_parser_peek_token (parser
)->id_kind
== C_ID_TYPENAME
6430 || c_parser_peek_token (parser
)->id_kind
== C_ID_CLASSNAME
))
6432 tree id
= c_parser_peek_token (parser
)->value
;
6433 c_parser_consume_token (parser
);
6434 return objc_get_class_reference (id
);
6436 return c_parser_expression (parser
).value
;
6439 /* Parse objc-message-args.
6443 objc-keywordarg-list
6445 objc-keywordarg-list:
6447 objc-keywordarg-list objc-keywordarg
6450 objc-selector : objc-keywordexpr
6455 c_parser_objc_message_args (c_parser
*parser
)
6457 tree sel
= c_parser_objc_selector (parser
);
6458 tree list
= NULL_TREE
;
6459 if (sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6464 if (!c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
6466 keywordexpr
= c_parser_objc_keywordexpr (parser
);
6467 list
= chainon (list
, build_tree_list (sel
, keywordexpr
));
6468 sel
= c_parser_objc_selector (parser
);
6469 if (!sel
&& c_parser_next_token_is_not (parser
, CPP_COLON
))
6475 /* Parse an objc-keywordexpr.
6482 c_parser_objc_keywordexpr (c_parser
*parser
)
6484 tree list
= c_parser_expr_list (parser
, true);
6485 if (TREE_CHAIN (list
) == NULL_TREE
)
6487 /* Just return the expression, remove a level of
6489 return TREE_VALUE (list
);
6493 /* We have a comma expression, we will collapse later. */
6499 /* Handle pragmas. Some OpenMP pragmas are associated with, and therefore
6500 should be considered, statements. ALLOW_STMT is true if we're within
6501 the context of a function and such pragmas are to be allowed. Returns
6502 true if we actually parsed such a pragma. */
6505 c_parser_pragma (c_parser
*parser
, enum pragma_context context
)
6509 id
= c_parser_peek_token (parser
)->pragma_kind
;
6510 gcc_assert (id
!= PRAGMA_NONE
);
6514 case PRAGMA_OMP_BARRIER
:
6515 if (context
!= pragma_compound
)
6517 if (context
== pragma_stmt
)
6518 c_parser_error (parser
, "%<#pragma omp barrier%> may only be "
6519 "used in compound statements");
6522 c_parser_omp_barrier (parser
);
6525 case PRAGMA_OMP_FLUSH
:
6526 if (context
!= pragma_compound
)
6528 if (context
== pragma_stmt
)
6529 c_parser_error (parser
, "%<#pragma omp flush%> may only be "
6530 "used in compound statements");
6533 c_parser_omp_flush (parser
);
6536 case PRAGMA_OMP_THREADPRIVATE
:
6537 c_parser_omp_threadprivate (parser
);
6540 case PRAGMA_OMP_SECTION
:
6541 error ("%<#pragma omp section%> may only be used in "
6542 "%<#pragma omp sections%> construct");
6543 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6546 case PRAGMA_GCC_PCH_PREPROCESS
:
6547 c_parser_error (parser
, "%<#pragma GCC pch_preprocess%> must be first");
6548 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6552 if (id
< PRAGMA_FIRST_EXTERNAL
)
6554 if (context
== pragma_external
)
6557 c_parser_error (parser
, "expected declaration specifiers");
6558 c_parser_skip_until_found (parser
, CPP_PRAGMA_EOL
, NULL
);
6561 c_parser_omp_construct (parser
);
6567 c_parser_consume_pragma (parser
);
6568 c_invoke_pragma_handler (id
);
6570 /* Skip to EOL, but suppress any error message. Those will have been
6571 generated by the handler routine through calling error, as opposed
6572 to calling c_parser_error. */
6573 parser
->error
= true;
6574 c_parser_skip_to_pragma_eol (parser
);
6579 /* The interface the pragma parsers have to the lexer. */
6582 pragma_lex (tree
*value
)
6584 c_token
*tok
= c_parser_peek_token (the_parser
);
6585 enum cpp_ttype ret
= tok
->type
;
6587 *value
= tok
->value
;
6588 if (ret
== CPP_PRAGMA_EOL
|| ret
== CPP_EOF
)
6592 if (ret
== CPP_KEYWORD
)
6594 c_parser_consume_token (the_parser
);
6601 c_parser_pragma_pch_preprocess (c_parser
*parser
)
6605 c_parser_consume_pragma (parser
);
6606 if (c_parser_next_token_is (parser
, CPP_STRING
))
6608 name
= c_parser_peek_token (parser
)->value
;
6609 c_parser_consume_token (parser
);
6612 c_parser_error (parser
, "expected string literal");
6613 c_parser_skip_to_pragma_eol (parser
);
6616 c_common_pch_pragma (parse_in
, TREE_STRING_POINTER (name
));
6619 /* OpenMP 2.5 parsing routines. */
6621 /* Returns name of the next clause.
6622 If the clause is not recognized PRAGMA_OMP_CLAUSE_NONE is returned and
6623 the token is not consumed. Otherwise appropriate pragma_omp_clause is
6624 returned and the token is consumed. */
6626 static pragma_omp_clause
6627 c_parser_omp_clause_name (c_parser
*parser
)
6629 pragma_omp_clause result
= PRAGMA_OMP_CLAUSE_NONE
;
6631 if (c_parser_next_token_is_keyword (parser
, RID_IF
))
6632 result
= PRAGMA_OMP_CLAUSE_IF
;
6633 else if (c_parser_next_token_is_keyword (parser
, RID_DEFAULT
))
6634 result
= PRAGMA_OMP_CLAUSE_DEFAULT
;
6635 else if (c_parser_next_token_is (parser
, CPP_NAME
))
6637 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6642 if (!strcmp ("copyin", p
))
6643 result
= PRAGMA_OMP_CLAUSE_COPYIN
;
6644 else if (!strcmp ("copyprivate", p
))
6645 result
= PRAGMA_OMP_CLAUSE_COPYPRIVATE
;
6648 if (!strcmp ("firstprivate", p
))
6649 result
= PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
;
6652 if (!strcmp ("lastprivate", p
))
6653 result
= PRAGMA_OMP_CLAUSE_LASTPRIVATE
;
6656 if (!strcmp ("nowait", p
))
6657 result
= PRAGMA_OMP_CLAUSE_NOWAIT
;
6658 else if (!strcmp ("num_threads", p
))
6659 result
= PRAGMA_OMP_CLAUSE_NUM_THREADS
;
6662 if (!strcmp ("ordered", p
))
6663 result
= PRAGMA_OMP_CLAUSE_ORDERED
;
6666 if (!strcmp ("private", p
))
6667 result
= PRAGMA_OMP_CLAUSE_PRIVATE
;
6670 if (!strcmp ("reduction", p
))
6671 result
= PRAGMA_OMP_CLAUSE_REDUCTION
;
6674 if (!strcmp ("schedule", p
))
6675 result
= PRAGMA_OMP_CLAUSE_SCHEDULE
;
6676 else if (!strcmp ("shared", p
))
6677 result
= PRAGMA_OMP_CLAUSE_SHARED
;
6682 if (result
!= PRAGMA_OMP_CLAUSE_NONE
)
6683 c_parser_consume_token (parser
);
6688 /* Validate that a clause of the given type does not already exist. */
6691 check_no_duplicate_clause (tree clauses
, enum tree_code code
, const char *name
)
6695 for (c
= clauses
; c
; c
= OMP_CLAUSE_CHAIN (c
))
6696 if (OMP_CLAUSE_CODE (c
) == code
)
6698 error ("too many %qs clauses", name
);
6706 variable-list , identifier
6708 If KIND is nonzero, create the appropriate node and install the decl
6709 in OMP_CLAUSE_DECL and add the node to the head of the list.
6711 If KIND is zero, create a TREE_LIST with the decl in TREE_PURPOSE;
6712 return the list created. */
6715 c_parser_omp_variable_list (c_parser
*parser
, enum omp_clause_code kind
,
6718 if (c_parser_next_token_is_not (parser
, CPP_NAME
)
6719 || c_parser_peek_token (parser
)->id_kind
!= C_ID_ID
)
6720 c_parser_error (parser
, "expected identifier");
6722 while (c_parser_next_token_is (parser
, CPP_NAME
)
6723 && c_parser_peek_token (parser
)->id_kind
== C_ID_ID
)
6725 tree t
= lookup_name (c_parser_peek_token (parser
)->value
);
6728 undeclared_variable (c_parser_peek_token (parser
)->value
,
6729 c_parser_peek_token (parser
)->location
);
6730 else if (t
== error_mark_node
)
6734 tree u
= build_omp_clause (kind
);
6735 OMP_CLAUSE_DECL (u
) = t
;
6736 OMP_CLAUSE_CHAIN (u
) = list
;
6740 list
= tree_cons (t
, NULL_TREE
, list
);
6742 c_parser_consume_token (parser
);
6744 if (c_parser_next_token_is_not (parser
, CPP_COMMA
))
6747 c_parser_consume_token (parser
);
6753 /* Similarly, but expect leading and trailing parenthesis. This is a very
6754 common case for omp clauses. */
6757 c_parser_omp_var_list_parens (c_parser
*parser
, enum tree_code kind
, tree list
)
6759 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6761 list
= c_parser_omp_variable_list (parser
, kind
, list
);
6762 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6768 copyin ( variable-list ) */
6771 c_parser_omp_clause_copyin (c_parser
*parser
, tree list
)
6773 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYIN
, list
);
6777 copyprivate ( variable-list ) */
6780 c_parser_omp_clause_copyprivate (c_parser
*parser
, tree list
)
6782 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_COPYPRIVATE
, list
);
6786 default ( shared | none ) */
6789 c_parser_omp_clause_default (c_parser
*parser
, tree list
)
6791 enum omp_clause_default_kind kind
= OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
6794 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6796 if (c_parser_next_token_is (parser
, CPP_NAME
))
6798 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
6803 if (strcmp ("none", p
) != 0)
6805 kind
= OMP_CLAUSE_DEFAULT_NONE
;
6809 if (strcmp ("shared", p
) != 0)
6811 kind
= OMP_CLAUSE_DEFAULT_SHARED
;
6818 c_parser_consume_token (parser
);
6823 c_parser_error (parser
, "expected %<none%> or %<shared%>");
6825 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6827 if (kind
== OMP_CLAUSE_DEFAULT_UNSPECIFIED
)
6830 check_no_duplicate_clause (list
, OMP_CLAUSE_DEFAULT
, "default");
6831 c
= build_omp_clause (OMP_CLAUSE_DEFAULT
);
6832 OMP_CLAUSE_CHAIN (c
) = list
;
6833 OMP_CLAUSE_DEFAULT_KIND (c
) = kind
;
6839 firstprivate ( variable-list ) */
6842 c_parser_omp_clause_firstprivate (c_parser
*parser
, tree list
)
6844 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_FIRSTPRIVATE
, list
);
6848 if ( expression ) */
6851 c_parser_omp_clause_if (c_parser
*parser
, tree list
)
6853 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
6855 tree t
= c_parser_paren_condition (parser
);
6858 check_no_duplicate_clause (list
, OMP_CLAUSE_IF
, "if");
6860 c
= build_omp_clause (OMP_CLAUSE_IF
);
6861 OMP_CLAUSE_IF_EXPR (c
) = t
;
6862 OMP_CLAUSE_CHAIN (c
) = list
;
6866 c_parser_error (parser
, "expected %<(%>");
6872 lastprivate ( variable-list ) */
6875 c_parser_omp_clause_lastprivate (c_parser
*parser
, tree list
)
6877 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_LASTPRIVATE
, list
);
6884 c_parser_omp_clause_nowait (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6888 check_no_duplicate_clause (list
, OMP_CLAUSE_NOWAIT
, "nowait");
6890 c
= build_omp_clause (OMP_CLAUSE_NOWAIT
);
6891 OMP_CLAUSE_CHAIN (c
) = list
;
6896 num_threads ( expression ) */
6899 c_parser_omp_clause_num_threads (c_parser
*parser
, tree list
)
6901 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6903 tree c
, t
= c_parser_expression (parser
).value
;
6905 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
6907 if (!INTEGRAL_TYPE_P (TREE_TYPE (t
)))
6909 c_parser_error (parser
, "expected integer expression");
6913 /* Attempt to statically determine when the number isn't positive. */
6914 c
= fold_build2 (LE_EXPR
, boolean_type_node
, t
,
6915 build_int_cst (TREE_TYPE (t
), 0));
6916 if (c
== boolean_true_node
)
6918 warning (0, "%<num_threads%> value must be positive");
6919 t
= integer_one_node
;
6922 check_no_duplicate_clause (list
, OMP_CLAUSE_NUM_THREADS
, "num_threads");
6924 c
= build_omp_clause (OMP_CLAUSE_NUM_THREADS
);
6925 OMP_CLAUSE_NUM_THREADS_EXPR (c
) = t
;
6926 OMP_CLAUSE_CHAIN (c
) = list
;
6937 c_parser_omp_clause_ordered (c_parser
*parser ATTRIBUTE_UNUSED
, tree list
)
6941 check_no_duplicate_clause (list
, OMP_CLAUSE_ORDERED
, "ordered");
6943 c
= build_omp_clause (OMP_CLAUSE_ORDERED
);
6944 OMP_CLAUSE_CHAIN (c
) = list
;
6949 private ( variable-list ) */
6952 c_parser_omp_clause_private (c_parser
*parser
, tree list
)
6954 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_PRIVATE
, list
);
6958 reduction ( reduction-operator : variable-list )
6961 One of: + * - & ^ | && || */
6964 c_parser_omp_clause_reduction (c_parser
*parser
, tree list
)
6966 if (c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
6968 enum tree_code code
;
6970 switch (c_parser_peek_token (parser
)->type
)
6982 code
= BIT_AND_EXPR
;
6985 code
= BIT_XOR_EXPR
;
6988 code
= BIT_IOR_EXPR
;
6991 code
= TRUTH_ANDIF_EXPR
;
6994 code
= TRUTH_ORIF_EXPR
;
6997 c_parser_error (parser
,
6998 "expected %<+%>, %<*%>, %<-%>, %<&%>, "
6999 "%<^%>, %<|%>, %<&&%>, or %<||%>");
7000 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7003 c_parser_consume_token (parser
);
7004 if (c_parser_require (parser
, CPP_COLON
, "expected %<:%>"))
7008 nl
= c_parser_omp_variable_list (parser
, OMP_CLAUSE_REDUCTION
, list
);
7009 for (c
= nl
; c
!= list
; c
= OMP_CLAUSE_CHAIN (c
))
7010 OMP_CLAUSE_REDUCTION_CODE (c
) = code
;
7014 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7020 schedule ( schedule-kind )
7021 schedule ( schedule-kind , expression )
7024 static | dynamic | guided | runtime
7028 c_parser_omp_clause_schedule (c_parser
*parser
, tree list
)
7032 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7035 c
= build_omp_clause (OMP_CLAUSE_SCHEDULE
);
7037 if (c_parser_next_token_is (parser
, CPP_NAME
))
7039 tree kind
= c_parser_peek_token (parser
)->value
;
7040 const char *p
= IDENTIFIER_POINTER (kind
);
7045 if (strcmp ("dynamic", p
) != 0)
7047 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_DYNAMIC
;
7051 if (strcmp ("guided", p
) != 0)
7053 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_GUIDED
;
7057 if (strcmp ("runtime", p
) != 0)
7059 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_RUNTIME
;
7066 else if (c_parser_next_token_is_keyword (parser
, RID_STATIC
))
7067 OMP_CLAUSE_SCHEDULE_KIND (c
) = OMP_CLAUSE_SCHEDULE_STATIC
;
7071 c_parser_consume_token (parser
);
7072 if (c_parser_next_token_is (parser
, CPP_COMMA
))
7074 c_parser_consume_token (parser
);
7076 t
= c_parser_expr_no_commas (parser
, NULL
).value
;
7078 if (OMP_CLAUSE_SCHEDULE_KIND (c
) == OMP_CLAUSE_SCHEDULE_RUNTIME
)
7079 error ("schedule %<runtime%> does not take "
7080 "a %<chunk_size%> parameter");
7081 else if (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
)
7082 OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c
) = t
;
7084 c_parser_error (parser
, "expected integer expression");
7086 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7089 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
,
7090 "expected %<,%> or %<)%>");
7092 check_no_duplicate_clause (list
, OMP_CLAUSE_SCHEDULE
, "schedule");
7093 OMP_CLAUSE_CHAIN (c
) = list
;
7097 c_parser_error (parser
, "invalid schedule kind");
7098 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, 0);
7103 shared ( variable-list ) */
7106 c_parser_omp_clause_shared (c_parser
*parser
, tree list
)
7108 return c_parser_omp_var_list_parens (parser
, OMP_CLAUSE_SHARED
, list
);
7111 /* Parse all OpenMP clauses. The set clauses allowed by the directive
7112 is a bitmask in MASK. Return the list of clauses found; the result
7113 of clause default goes in *pdefault. */
7116 c_parser_omp_all_clauses (c_parser
*parser
, unsigned int mask
,
7119 tree clauses
= NULL
;
7121 while (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7123 const pragma_omp_clause c_kind
= c_parser_omp_clause_name (parser
);
7125 tree prev
= clauses
;
7129 case PRAGMA_OMP_CLAUSE_COPYIN
:
7130 clauses
= c_parser_omp_clause_copyin (parser
, clauses
);
7133 case PRAGMA_OMP_CLAUSE_COPYPRIVATE
:
7134 clauses
= c_parser_omp_clause_copyprivate (parser
, clauses
);
7135 c_name
= "copyprivate";
7137 case PRAGMA_OMP_CLAUSE_DEFAULT
:
7138 clauses
= c_parser_omp_clause_default (parser
, clauses
);
7141 case PRAGMA_OMP_CLAUSE_FIRSTPRIVATE
:
7142 clauses
= c_parser_omp_clause_firstprivate (parser
, clauses
);
7143 c_name
= "firstprivate";
7145 case PRAGMA_OMP_CLAUSE_IF
:
7146 clauses
= c_parser_omp_clause_if (parser
, clauses
);
7149 case PRAGMA_OMP_CLAUSE_LASTPRIVATE
:
7150 clauses
= c_parser_omp_clause_lastprivate (parser
, clauses
);
7151 c_name
= "lastprivate";
7153 case PRAGMA_OMP_CLAUSE_NOWAIT
:
7154 clauses
= c_parser_omp_clause_nowait (parser
, clauses
);
7157 case PRAGMA_OMP_CLAUSE_NUM_THREADS
:
7158 clauses
= c_parser_omp_clause_num_threads (parser
, clauses
);
7159 c_name
= "num_threads";
7161 case PRAGMA_OMP_CLAUSE_ORDERED
:
7162 clauses
= c_parser_omp_clause_ordered (parser
, clauses
);
7165 case PRAGMA_OMP_CLAUSE_PRIVATE
:
7166 clauses
= c_parser_omp_clause_private (parser
, clauses
);
7169 case PRAGMA_OMP_CLAUSE_REDUCTION
:
7170 clauses
= c_parser_omp_clause_reduction (parser
, clauses
);
7171 c_name
= "reduction";
7173 case PRAGMA_OMP_CLAUSE_SCHEDULE
:
7174 clauses
= c_parser_omp_clause_schedule (parser
, clauses
);
7175 c_name
= "schedule";
7177 case PRAGMA_OMP_CLAUSE_SHARED
:
7178 clauses
= c_parser_omp_clause_shared (parser
, clauses
);
7182 c_parser_error (parser
, "expected %<#pragma omp%> clause");
7186 if (((mask
>> c_kind
) & 1) == 0 && !parser
->error
)
7188 /* Remove the invalid clause(s) from the list to avoid
7189 confusing the rest of the compiler. */
7191 error ("%qs is not valid for %qs", c_name
, where
);
7196 c_parser_skip_to_pragma_eol (parser
);
7198 return c_finish_omp_clauses (clauses
);
7205 In practice, we're also interested in adding the statement to an
7206 outer node. So it is convenient if we work around the fact that
7207 c_parser_statement calls add_stmt. */
7210 c_parser_omp_structured_block (c_parser
*parser
)
7212 tree stmt
= push_stmt_list ();
7213 c_parser_statement (parser
);
7214 return pop_stmt_list (stmt
);
7218 # pragma omp atomic new-line
7222 x binop= expr | x++ | ++x | x-- | --x
7224 +, *, -, /, &, ^, |, <<, >>
7226 where x is an lvalue expression with scalar type. */
7229 c_parser_omp_atomic (c_parser
*parser
)
7233 enum tree_code code
;
7235 c_parser_skip_to_pragma_eol (parser
);
7237 lhs
= c_parser_unary_expression (parser
).value
;
7238 switch (TREE_CODE (lhs
))
7242 c_parser_skip_to_end_of_block_or_statement (parser
);
7245 case PREINCREMENT_EXPR
:
7246 case POSTINCREMENT_EXPR
:
7247 lhs
= TREE_OPERAND (lhs
, 0);
7249 rhs
= integer_one_node
;
7252 case PREDECREMENT_EXPR
:
7253 case POSTDECREMENT_EXPR
:
7254 lhs
= TREE_OPERAND (lhs
, 0);
7256 rhs
= integer_one_node
;
7260 switch (c_parser_peek_token (parser
)->type
)
7266 code
= TRUNC_DIV_EXPR
;
7281 code
= BIT_AND_EXPR
;
7284 code
= BIT_IOR_EXPR
;
7287 code
= BIT_XOR_EXPR
;
7290 c_parser_error (parser
,
7291 "invalid operator for %<#pragma omp atomic%>");
7295 c_parser_consume_token (parser
);
7296 rhs
= c_parser_expression (parser
).value
;
7299 stmt
= c_finish_omp_atomic (code
, lhs
, rhs
);
7300 if (stmt
!= error_mark_node
)
7302 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7307 # pragma omp barrier new-line
7311 c_parser_omp_barrier (c_parser
*parser
)
7313 c_parser_consume_pragma (parser
);
7314 c_parser_skip_to_pragma_eol (parser
);
7316 c_finish_omp_barrier ();
7320 # pragma omp critical [(name)] new-line
7325 c_parser_omp_critical (c_parser
*parser
)
7327 tree stmt
, name
= NULL
;
7329 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7331 c_parser_consume_token (parser
);
7332 if (c_parser_next_token_is (parser
, CPP_NAME
))
7334 name
= c_parser_peek_token (parser
)->value
;
7335 c_parser_consume_token (parser
);
7336 c_parser_require (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7339 c_parser_error (parser
, "expected identifier");
7341 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7342 c_parser_error (parser
, "expected %<(%> or end of line");
7343 c_parser_skip_to_pragma_eol (parser
);
7345 stmt
= c_parser_omp_structured_block (parser
);
7346 return c_finish_omp_critical (stmt
, name
);
7350 # pragma omp flush flush-vars[opt] new-line
7353 ( variable-list ) */
7356 c_parser_omp_flush (c_parser
*parser
)
7358 c_parser_consume_pragma (parser
);
7359 if (c_parser_next_token_is (parser
, CPP_OPEN_PAREN
))
7360 c_parser_omp_var_list_parens (parser
, 0, NULL
);
7361 else if (c_parser_next_token_is_not (parser
, CPP_PRAGMA_EOL
))
7362 c_parser_error (parser
, "expected %<(%> or end of line");
7363 c_parser_skip_to_pragma_eol (parser
);
7365 c_finish_omp_flush ();
7368 /* Parse the restricted form of the for statment allowed by OpenMP.
7369 The real trick here is to determine the loop control variable early
7370 so that we can push a new decl if necessary to make it private. */
7373 c_parser_omp_for_loop (c_parser
*parser
)
7375 tree decl
, cond
, incr
, save_break
, save_cont
, body
, init
;
7378 if (!c_parser_next_token_is_keyword (parser
, RID_FOR
))
7380 c_parser_error (parser
, "for statement expected");
7383 loc
= c_parser_peek_token (parser
)->location
;
7384 c_parser_consume_token (parser
);
7386 if (!c_parser_require (parser
, CPP_OPEN_PAREN
, "expected %<(%>"))
7389 /* Parse the initialization declaration or expression. */
7390 if (c_parser_next_token_starts_declspecs (parser
))
7392 c_parser_declaration_or_fndef (parser
, true, true, true, true);
7393 decl
= check_for_loop_decls ();
7398 else if (c_parser_next_token_is (parser
, CPP_NAME
)
7399 && c_parser_peek_2nd_token (parser
)->type
== CPP_EQ
)
7401 decl
= c_parser_postfix_expression (parser
).value
;
7403 c_parser_require (parser
, CPP_EQ
, "expected %<=%>");
7405 init
= c_parser_expr_no_commas (parser
, NULL
).value
;
7406 init
= build_modify_expr (decl
, NOP_EXPR
, init
);
7407 init
= c_process_expr_stmt (init
);
7409 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7414 /* Parse the loop condition. */
7416 if (c_parser_next_token_is_not (parser
, CPP_SEMICOLON
))
7418 cond
= c_parser_expression_conv (parser
).value
;
7419 cond
= c_objc_common_truthvalue_conversion (cond
);
7421 SET_EXPR_LOCATION (cond
, input_location
);
7423 c_parser_skip_until_found (parser
, CPP_SEMICOLON
, "expected %<;%>");
7425 /* Parse the increment expression. */
7427 if (c_parser_next_token_is_not (parser
, CPP_CLOSE_PAREN
))
7428 incr
= c_process_expr_stmt (c_parser_expression (parser
).value
);
7429 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7432 save_break
= c_break_label
;
7433 c_break_label
= size_one_node
;
7434 save_cont
= c_cont_label
;
7435 c_cont_label
= NULL_TREE
;
7436 body
= push_stmt_list ();
7438 add_stmt (c_parser_c99_block_statement (parser
));
7440 add_stmt (build1 (LABEL_EXPR
, void_type_node
, c_cont_label
));
7442 body
= pop_stmt_list (body
);
7443 c_break_label
= save_break
;
7444 c_cont_label
= save_cont
;
7446 /* Only bother calling c_finish_omp_for if we havn't already generated
7447 an error from the initialization parsing. */
7448 if (decl
!= NULL
&& decl
!= error_mark_node
&& init
!= error_mark_node
)
7449 return c_finish_omp_for (loc
, decl
, init
, cond
, incr
, body
, NULL
);
7453 c_parser_error (parser
, "expected iteration declaration or initialization");
7454 c_parser_skip_until_found (parser
, CPP_CLOSE_PAREN
, "expected %<)%>");
7455 decl
= init
= cond
= incr
= NULL_TREE
;
7460 #pragma omp for for-clause[optseq] new-line
7464 #define OMP_FOR_CLAUSE_MASK \
7465 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7466 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7467 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7468 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7469 | (1u << PRAGMA_OMP_CLAUSE_ORDERED) \
7470 | (1u << PRAGMA_OMP_CLAUSE_SCHEDULE) \
7471 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7474 c_parser_omp_for (c_parser
*parser
)
7476 tree block
, clauses
, ret
;
7478 clauses
= c_parser_omp_all_clauses (parser
, OMP_FOR_CLAUSE_MASK
,
7481 block
= c_begin_compound_stmt (true);
7482 ret
= c_parser_omp_for_loop (parser
);
7484 OMP_FOR_CLAUSES (ret
) = clauses
;
7485 block
= c_end_compound_stmt (block
, true);
7492 # pragma omp master new-line
7497 c_parser_omp_master (c_parser
*parser
)
7499 c_parser_skip_to_pragma_eol (parser
);
7500 return c_finish_omp_master (c_parser_omp_structured_block (parser
));
7504 # pragma omp ordered new-line
7509 c_parser_omp_ordered (c_parser
*parser
)
7511 c_parser_skip_to_pragma_eol (parser
);
7512 return c_finish_omp_ordered (c_parser_omp_structured_block (parser
));
7518 { section-sequence }
7521 section-directive[opt] structured-block
7522 section-sequence section-directive structured-block */
7525 c_parser_omp_sections_scope (c_parser
*parser
)
7528 bool error_suppress
= false;
7531 if (!c_parser_require (parser
, CPP_OPEN_BRACE
, "expected %<{%>"))
7533 /* Avoid skipping until the end of the block. */
7534 parser
->error
= false;
7538 stmt
= push_stmt_list ();
7540 loc
= c_parser_peek_token (parser
)->location
;
7541 if (c_parser_peek_token (parser
)->pragma_kind
!= PRAGMA_OMP_SECTION
)
7543 substmt
= push_stmt_list ();
7547 c_parser_statement (parser
);
7549 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7551 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7553 if (c_parser_next_token_is (parser
, CPP_EOF
))
7557 substmt
= pop_stmt_list (substmt
);
7558 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7559 SET_EXPR_LOCATION (substmt
, loc
);
7565 if (c_parser_next_token_is (parser
, CPP_CLOSE_BRACE
))
7567 if (c_parser_next_token_is (parser
, CPP_EOF
))
7570 loc
= c_parser_peek_token (parser
)->location
;
7571 if (c_parser_peek_token (parser
)->pragma_kind
== PRAGMA_OMP_SECTION
)
7573 c_parser_consume_pragma (parser
);
7574 c_parser_skip_to_pragma_eol (parser
);
7575 error_suppress
= false;
7577 else if (!error_suppress
)
7579 error ("expected %<#pragma omp section%> or %<}%>");
7580 error_suppress
= true;
7583 substmt
= c_parser_omp_structured_block (parser
);
7584 substmt
= build1 (OMP_SECTION
, void_type_node
, substmt
);
7585 SET_EXPR_LOCATION (substmt
, loc
);
7588 c_parser_skip_until_found (parser
, CPP_CLOSE_BRACE
,
7589 "expected %<#pragma omp section%> or %<}%>");
7591 substmt
= pop_stmt_list (stmt
);
7593 stmt
= make_node (OMP_SECTIONS
);
7594 TREE_TYPE (stmt
) = void_type_node
;
7595 OMP_SECTIONS_BODY (stmt
) = substmt
;
7597 return add_stmt (stmt
);
7601 # pragma omp sections sections-clause[optseq] newline
7605 #define OMP_SECTIONS_CLAUSE_MASK \
7606 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7607 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7608 | (1u << PRAGMA_OMP_CLAUSE_LASTPRIVATE) \
7609 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7610 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7613 c_parser_omp_sections (c_parser
*parser
)
7615 tree block
, clauses
, ret
;
7617 clauses
= c_parser_omp_all_clauses (parser
, OMP_SECTIONS_CLAUSE_MASK
,
7618 "#pragma omp sections");
7620 block
= c_begin_compound_stmt (true);
7621 ret
= c_parser_omp_sections_scope (parser
);
7623 OMP_SECTIONS_CLAUSES (ret
) = clauses
;
7624 block
= c_end_compound_stmt (block
, true);
7631 # pragma parallel parallel-clause new-line
7632 # pragma parallel for parallel-for-clause new-line
7633 # pragma parallel sections parallel-sections-clause new-line
7636 #define OMP_PARALLEL_CLAUSE_MASK \
7637 ( (1u << PRAGMA_OMP_CLAUSE_IF) \
7638 | (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7639 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7640 | (1u << PRAGMA_OMP_CLAUSE_DEFAULT) \
7641 | (1u << PRAGMA_OMP_CLAUSE_SHARED) \
7642 | (1u << PRAGMA_OMP_CLAUSE_COPYIN) \
7643 | (1u << PRAGMA_OMP_CLAUSE_REDUCTION) \
7644 | (1u << PRAGMA_OMP_CLAUSE_NUM_THREADS))
7647 c_parser_omp_parallel (c_parser
*parser
)
7649 enum pragma_kind p_kind
= PRAGMA_OMP_PARALLEL
;
7650 const char *p_name
= "#pragma omp parallel";
7651 tree stmt
, clauses
, par_clause
, ws_clause
, block
;
7652 unsigned int mask
= OMP_PARALLEL_CLAUSE_MASK
;
7654 if (c_parser_next_token_is_keyword (parser
, RID_FOR
))
7656 c_parser_consume_token (parser
);
7657 p_kind
= PRAGMA_OMP_PARALLEL_FOR
;
7658 p_name
= "#pragma omp parallel for";
7659 mask
|= OMP_FOR_CLAUSE_MASK
;
7660 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7662 else if (c_parser_next_token_is (parser
, CPP_NAME
))
7664 const char *p
= IDENTIFIER_POINTER (c_parser_peek_token (parser
)->value
);
7665 if (strcmp (p
, "sections") == 0)
7667 c_parser_consume_token (parser
);
7668 p_kind
= PRAGMA_OMP_PARALLEL_SECTIONS
;
7669 p_name
= "#pragma omp parallel sections";
7670 mask
|= OMP_SECTIONS_CLAUSE_MASK
;
7671 mask
&= ~(1u << PRAGMA_OMP_CLAUSE_NOWAIT
);
7675 clauses
= c_parser_omp_all_clauses (parser
, mask
, p_name
);
7679 case PRAGMA_OMP_PARALLEL
:
7680 block
= c_begin_omp_parallel ();
7681 c_parser_statement (parser
);
7682 stmt
= c_finish_omp_parallel (clauses
, block
);
7685 case PRAGMA_OMP_PARALLEL_FOR
:
7686 block
= c_begin_omp_parallel ();
7687 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7688 stmt
= c_parser_omp_for_loop (parser
);
7690 OMP_FOR_CLAUSES (stmt
) = ws_clause
;
7691 stmt
= c_finish_omp_parallel (par_clause
, block
);
7692 OMP_PARALLEL_COMBINED (stmt
) = 1;
7695 case PRAGMA_OMP_PARALLEL_SECTIONS
:
7696 block
= c_begin_omp_parallel ();
7697 c_split_parallel_clauses (clauses
, &par_clause
, &ws_clause
);
7698 stmt
= c_parser_omp_sections_scope (parser
);
7700 OMP_SECTIONS_CLAUSES (stmt
) = ws_clause
;
7701 stmt
= c_finish_omp_parallel (par_clause
, block
);
7702 OMP_PARALLEL_COMBINED (stmt
) = 1;
7713 # pragma omp single single-clause[optseq] new-line
7717 #define OMP_SINGLE_CLAUSE_MASK \
7718 ( (1u << PRAGMA_OMP_CLAUSE_PRIVATE) \
7719 | (1u << PRAGMA_OMP_CLAUSE_FIRSTPRIVATE) \
7720 | (1u << PRAGMA_OMP_CLAUSE_COPYPRIVATE) \
7721 | (1u << PRAGMA_OMP_CLAUSE_NOWAIT))
7724 c_parser_omp_single (c_parser
*parser
)
7726 tree stmt
= make_node (OMP_SINGLE
);
7727 TREE_TYPE (stmt
) = void_type_node
;
7729 OMP_SINGLE_CLAUSES (stmt
)
7730 = c_parser_omp_all_clauses (parser
, OMP_SINGLE_CLAUSE_MASK
,
7731 "#pragma omp single");
7732 OMP_SINGLE_BODY (stmt
) = c_parser_omp_structured_block (parser
);
7734 return add_stmt (stmt
);
7738 /* Main entry point to parsing most OpenMP pragmas. */
7741 c_parser_omp_construct (c_parser
*parser
)
7743 enum pragma_kind p_kind
;
7747 loc
= c_parser_peek_token (parser
)->location
;
7748 p_kind
= c_parser_peek_token (parser
)->pragma_kind
;
7749 c_parser_consume_pragma (parser
);
7753 case PRAGMA_OMP_ATOMIC
:
7754 c_parser_omp_atomic (parser
);
7756 case PRAGMA_OMP_CRITICAL
:
7757 stmt
= c_parser_omp_critical (parser
);
7759 case PRAGMA_OMP_FOR
:
7760 stmt
= c_parser_omp_for (parser
);
7762 case PRAGMA_OMP_MASTER
:
7763 stmt
= c_parser_omp_master (parser
);
7765 case PRAGMA_OMP_ORDERED
:
7766 stmt
= c_parser_omp_ordered (parser
);
7768 case PRAGMA_OMP_PARALLEL
:
7769 stmt
= c_parser_omp_parallel (parser
);
7771 case PRAGMA_OMP_SECTIONS
:
7772 stmt
= c_parser_omp_sections (parser
);
7774 case PRAGMA_OMP_SINGLE
:
7775 stmt
= c_parser_omp_single (parser
);
7782 SET_EXPR_LOCATION (stmt
, loc
);
7787 # pragma omp threadprivate (variable-list) */
7790 c_parser_omp_threadprivate (c_parser
*parser
)
7794 c_parser_consume_pragma (parser
);
7795 vars
= c_parser_omp_var_list_parens (parser
, 0, NULL
);
7797 if (!targetm
.have_tls
)
7798 sorry ("threadprivate variables not supported in this target");
7800 /* Mark every variable in VARS to be assigned thread local storage. */
7801 for (t
= vars
; t
; t
= TREE_CHAIN (t
))
7803 tree v
= TREE_PURPOSE (t
);
7805 /* If V had already been marked threadprivate, it doesn't matter
7806 whether it had been used prior to this point. */
7807 if (TREE_USED (v
) && !C_DECL_THREADPRIVATE_P (v
))
7808 error ("%qE declared %<threadprivate%> after first use", v
);
7809 else if (! TREE_STATIC (v
) && ! DECL_EXTERNAL (v
))
7810 error ("automatic variable %qE cannot be %<threadprivate%>", v
);
7811 else if (! COMPLETE_TYPE_P (TREE_TYPE (v
)))
7812 error ("%<threadprivate%> %qE has incomplete type", v
);
7815 if (! DECL_THREAD_LOCAL_P (v
))
7817 DECL_TLS_MODEL (v
) = decl_default_tls_model (v
);
7818 /* If rtl has been already set for this var, call
7819 make_decl_rtl once again, so that encode_section_info
7820 has a chance to look at the new decl flags. */
7821 if (DECL_RTL_SET_P (v
))
7824 C_DECL_THREADPRIVATE_P (v
) = 1;
7828 c_parser_skip_to_pragma_eol (parser
);
7832 /* Parse a single source file. */
7837 /* Use local storage to begin. If the first token is a pragma, parse it.
7838 If it is #pragma GCC pch_preprocess, then this will load a PCH file
7839 which will cause garbage collection. */
7842 memset (&tparser
, 0, sizeof tparser
);
7843 the_parser
= &tparser
;
7845 if (c_parser_peek_token (&tparser
)->pragma_kind
== PRAGMA_GCC_PCH_PREPROCESS
)
7846 c_parser_pragma_pch_preprocess (&tparser
);
7848 the_parser
= GGC_NEW (c_parser
);
7849 *the_parser
= tparser
;
7851 c_parser_translation_unit (the_parser
);
7855 #include "gt-c-parser.h"